阅读说明：本技术 一种双座摇篮婴儿车 (Double-seat cradle baby carriage ) 是由 不公告发明人 于 2020-11-17 设计创作，主要内容包括：本发明公开一种双座摇篮婴儿车,包括第一座椅、第二座椅、车架机构、底盘机构、扶手架,两个座椅均可为婴幼儿提供一个舒适的乘坐和卧躺空间,第一座椅的靠背倾斜角度也可根据婴幼儿喜好进行调整,第二座椅的坐板高度可根据婴幼儿体型进行调节,车架机构上端与两个座椅后端可通过模块化的快插结构进行连接和分离,车架机构采用的多连杆结构,可方便地实现座椅的高度和方向调整,同时也能依据钟摆效应实现两个座椅的横向摇篮功能,车架机构下端与底盘机构紧固连接,扶手架下端与底盘机构紧固连接,底盘机构下设有四个车轮,家长能够通过扶手架实现对婴儿车的操控。(The invention discloses a double-seat cradle baby carriage, which comprises a first seat, a second seat, a carriage mechanism, a chassis mechanism and an armrest frame, wherein the two seats can provide a comfortable sitting and lying space for infants, the inclination angle of a backrest of the first seat can be adjusted according to the preference of the infants, the height of a seat plate of the second seat can be adjusted according to the body types of the infants, the upper end of the carriage mechanism and the rear ends of the two seats can be connected and separated through a modularized quick-insertion structure, the carriage mechanism adopts a multi-connecting-rod structure, the height and direction adjustment of the seats can be conveniently realized, meanwhile, the transverse cradle function of the two seats can be realized according to the pendulum effect, the lower end of the frame mechanism is fixedly connected with the chassis mechanism, the lower end of the armrest frame is fixedly connected with the chassis mechanism, the four wheels are arranged below the chassis mechanism, and parents can realize the control of the baby carriage through the armrest frame.)

1. The utility model provides a two-seater cradle perambulator, includes first seat (1.1), second seat (1.2), frame mechanism (2), chassis mechanism (3), handrail frame (4), its characterized in that: the first seat (1.1) and the second seat (1.2) can adjust the pitching inclination angle and provide a comfortable sitting and lying space for the infant, the inner parts of the first seat (1.1) and the second seat can form a flat plane to facilitate the infant to lie and play, the inclination angle of the backrest of the first seat (1.1) can be adjusted according to the preference of the infant, the height of the seat plate of the second seat (1.2) can be adjusted according to the body type of the infant, the upper end of the frame mechanism (2) can be connected and separated with the rear ends of the first seat (1.1) and the second seat (1.2) through a modularized fast-plugging structure, the frame mechanism (2) adopts a multi-link structure, the height and direction adjustment of the first seat (1.1) and the second seat (1.2) can be conveniently realized, the great flexibility and convenience are realized, and the transverse cradle function of the first seat (1.1) and the second seat (1.2) can be realized according to a pendulum effect at the same time, the lower end of the frame mechanism (2) is fixedly connected with the chassis mechanism (3), the lower end of the handrail frame (4) is fixedly connected with the chassis mechanism (3), four wheels are arranged below the chassis mechanism (3), and parents can control the baby carriage through the handrail frame (4).

2. The dual-seat cradle infant car according to claim 1, wherein: the first seat (1.1) comprises a first frame (101), a rear overturning plate (102), a pressing plate (102.2), a front overturning plate (103), a first insert rod (104), a first spring (105), a first connecting rod (106), a second connecting rod (107), a second spring (108), a second insert rod (109), a first positioning cover (110), a first knob (111), a second knob (112), a second positioning cover (113), a third insert rod (114), a third spring (115), a third connecting rod (116), a fourth connecting rod (117), a fourth spring (118), a fourth insert rod (119), a spring leaf (120), a pressing plate hook (121), a first button (122), a first hook (123), a first slot inserting frame (124), a first wedge block (125), a first nut (126), a first ejector rod (127), a first hook spring (128) and a first set screw (129), wherein the first frame (101) is a main body supporting structure of the first seat (1.1), the front end of the backrest is provided with a seat plate (101.1) and a transverse armrest, a front turning plate (103) and the seat plate (101.1) form a revolute pair, the inclination angle of the front turning plate (103) is locked through a positioning mechanism consisting of a first inserted link (104), a first spring (105), a first connecting link (106), a second connecting link (107), a second spring (108), a second inserted link (109) and a first knob (111) to provide a comfortable backrest for infants, a first positioning cover (110) covers the outer side of the positioning mechanism, a rear turning plate (102) and the front turning plate (103) form a revolute pair, the locking of the rear turning plate (102) relative to the front turning plate (103) is realized through a locking mechanism consisting of a pressing plate (102.2), a pressing plate hook (121) and a spring piece (120), and the second knob (112), a third inserted link (114), a third spring (115), a third connecting link (116), a fourth connecting link (117), A positioning mechanism consisting of a fourth spring (118) and a fourth inserted link (119) can ensure that when the front turning plate (103) is in a horizontal state, the inclination angle of the rear turning plate (102) is locked, the second positioning cover (113) covers the outer side of the positioning mechanism, the first slot frame (124) and the first frame (101) form a revolute pair, the lower end of the first slot frame (124) adjusts the pitching inclination angle of the first seat (1.1) through an adjusting mechanism formed by a first wedge-shaped block (125), a first nut (126) and a first ejector rod (127), so that first seat (1.1) can bring comfortable riding experience for the infant of different hobbies, the modularization that comprises first slot frame (124), first button (122), first couple spring (128), first holding screw (129), first couple (123) inserts the structure soon can realize first seat (1.1) and high-efficient and quick connection and separation of frame mechanism (2).

3. The dual-seat cradle infant car according to claim 2, wherein: six pairs of front positioning holes (101.2) which are distributed in an equidistant circular arc manner are arranged on two sides of the middle part of the first frame (101), five pairs of rear positioning holes (101.3) which are distributed in an equidistant circular arc manner are arranged on two sides of the rear end of the first frame (101), a seat plate (101.1) is arranged at the front end of the first frame (101), a lower end of a front turning plate (103) and the rear end of the seat plate (101.1) form a revolute pair, a front plate upright post (103.1), a front plate left socket (103.2) and a front plate right socket (103.3) are arranged on the rear side of the front turning plate (103), two shifting posts are arranged on the upper side and the lower side of the front end of a first knob (111) and form a revolute pair with the front plate upright post (103.1), a first insertion rod (104) is arranged in the front plate left socket (103.2) and forms a moving pair, a first spring (105) is arranged between the first insertion rod (104) and the front plate left socket (103.2), under the elastic force action of the first spring (105), the, the first connecting rod (106) is arranged between the right end of the first inserted bar (104) and the upper side shifting column at the front end of the first knob (111), and forms a revolute pair with the first connecting rod and the second connecting rod; the second inserted bar (109) is arranged in the front plate right socket (103.3) and forms a moving pair, the second spring (108) is arranged between the second inserted bar (109) and the front plate right socket (103.3), the second inserted bar (109) is always positioned at the right end of the front plate right socket (103.3) under the action of the elastic force of the second spring (108), and the second connecting rod (107) is arranged between the left end of the second inserted bar (109) and the lower side shifting column at the front end of the first knob (111) and forms a rotating pair with the rear two;

in a natural state, the first inserted link (104) and the second inserted link (109) are respectively inserted into a pair of front positioning holes (101.2) at two sides of the first frame (101) under the action of the elastic forces of the first spring (105) and the second spring (108), when the inclination angle of the front turning plate (103) needs to be adjusted, the first knob (111) is twisted clockwise, under the action of the pulling force of the first connecting rod (106) and the second connecting rod (107), the first inserted link (104) moves rightwards, the second inserted link (109) moves leftwards, after the first inserted link (104) and the second inserted link (109) are separated from the front positioning hole (101.2), the front turning plate (103) can be adjusted to a proper inclined position, and the first knob (111) is loosened to enable the first insertion rod (104) and the second insertion rod (109) to be inserted into the front positioning hole (101.2) at a new position, so that the inclination angle adjustment action of the front turning plate (103) can be completed; when the first insertion rod (104) and the second insertion rod (109) are inserted into the pair of front positioning holes (101.2) at the lowermost end, the front turning plate (103) and the seat plate (101.1) form a plane;

the lower end of the rear turning plate (102) and the upper end of the front turning plate (103) form a revolute pair, the two pressure plate hooks (121) are mounted at the upper end of the front turning plate (103) and form the revolute pair, the spring leaf (120) is mounted between the lower end of the pressure plate hook (121) and the front turning plate (103), the two pressure plates (102.2) are fixedly mounted at the lower end of the rear turning plate (102) through screws, the rear turning plate (102) rotates anticlockwise relative to the front turning plate (103) until the rear turning plate and the front turning plate form a plane, the two pressure plates (102.2) can be clamped into the two pressure plate hooks (121), and under the action of the elastic force of the spring leaf (120), the pressure plate hooks (121) compress the pressure plates (102.2), so; the lower ends of the two pressure plate hooks (121) are pressed to rotate anticlockwise, and the rotation of the rear turning plate (102) relative to the front turning plate (103) can be restored after the pressure plate (102.2) is separated from the pressure plate hooks (121);

a rear plate upright post (102.1), a rear plate right socket (102.3) and a rear plate left socket (102.4) are arranged on the rear side of the rear turning plate (102), two poking columns are arranged on the upper side and the lower side of the front end of the second knob (112) and form a revolute pair with the rear plate upright post (102.1), a third inserted bar (114) is installed in the rear plate right socket (102.3) and form a revolute pair, a third spring (115) is installed between the third inserted bar (114) and the rear plate right socket (102.3), the third inserted bar (114) is always positioned at the right end of the rear plate right socket (102.3) under the action of the elastic force of the third spring (115), and a third connecting rod (116) is installed between the left end of the third inserted bar (114) and the poking column on the lower side of the front end of the second knob (112) and form a revolute pair with the rear inserted bar and the rear; the fourth inserted bar (119) is arranged in the rear plate left socket (102.4) to form a sliding pair, the fourth spring (118) is arranged between the fourth inserted bar (119) and the rear plate left socket (102.4), the fourth inserted bar (119) is always positioned at the left end position of the rear plate left socket (102.4) under the elastic force action of the fourth spring (118), and the fourth connecting rod (117) is arranged between the right end of the fourth inserted bar (119) and the upper side shifting column at the front end of the second knob (112) and forms a rotating pair with the rear two;

after the front turning plate (103) and the seat plate (101.1) form a plane, under the natural state, a third inserted link (114) and a fourth inserted link (119) are respectively inserted into a pair of rear positioning holes (101.3) under the elastic force action of a third spring (115) and a fourth spring (118), when the inclination angle of the rear turning plate (102) needs to be adjusted, the second knob (112) is twisted clockwise, under the action of the tension of the third connecting rod (116) and the fourth connecting rod (117), the third inserted link (114) moves leftwards, the fourth inserted link (119) moves rightwards, after the third inserted link (114) and the fourth inserted link (119) are separated from the rear positioning hole (101.3), the rear turning plate (102) can be adjusted to a proper inclined position, and the second knob (112) is loosened to enable the third insertion rod (114) and the fourth insertion rod (119) to be inserted into the rear positioning hole (101.3) at a new position, so that the inclination angle adjustment action of the rear turning plate (102) can be completed; when the third insertion rod (114) and the fourth insertion rod (119) are inserted into the pair of rear positioning holes (101.3) at the lowest end, the rear turning plate (102), the front turning plate (103) and the seat plate (101.1) form a plane for the infant to lie and rest.

4. The dual-seat cradle infant car according to claim 2, wherein: the rear side of the first frame (101) is provided with a connecting seat (101.5) and a top rod seat (101.4), the upper end of the left side of the first slot frame (124) and the connecting seat (101.5) form a revolute pair, the upper end of the right side of the first slot frame (124) is provided with a rectangular groove, the upper end of the rectangular groove is provided with two rectangular jacks, the lower end of the first slot frame (124) is internally provided with a hook cavity and a transverse button hole, a first hook (123) is arranged in the hook cavity and can slide up and down in the hook cavity, the upper end of the first hook (123) is provided with an inclined plane structure, the middle position of the first hook (123) is provided with a rectangular opening, the lower side of the first button (122) is provided with an inclined plane, the first button (122) passes through the rectangular opening in the middle of the first hook (123) and is arranged in the button hole of the first slot frame (124), the lower end of the first slot frame (124) is provided with two threaded holes, two first hook springs (128) are respectively arranged between two first set screws (129) and a first hook (123), the left end of a first ejector rod (127) and an ejector rod seat (101.4) form a revolute pair, and a threaded structure at the right end, two first wedge blocks (125) and two first nuts (126) clamp the lower end of a first slot frame (124) together;

in an initial state, under the action of the elastic force of a first hook spring (128), a first hook (123) is positioned at the upper end of a hook cavity, an inclined plane structure at the upper end of the first hook (123) extends into a rectangular groove at the upper end of the right side of a first slot frame (124), and an inclined plane at the lower side of a first button (122) is pressed leftwards to push the first hook (123) to move downwards, so that the inclined plane structure at the upper end of the first hook (123) retracts into the hook cavity; after the first button (122) is released from being pressed, the first hook (123) returns to the initial position under the action of the elastic force of the first hook spring (128);

the first set screw (129) and the first slot frame (124) form a thread pair connection, and the compression amount of the first hook spring (128) can be changed by adjusting the position of the first set screw (129), so that the pressing and rebounding force of the first button (122) can be adjusted;

the adjustment of the pitch angle of the first seat (1.1) can be realized by adjusting the positions of the two first nuts (126) on the first mandril (127): when the two first nuts (126) move leftwards on the first ejector rod (127), the front end of the first seat (1.1) inclines downwards, and when the two first nuts (126) move rightwards on the first ejector rod (127), the front end of the first seat (1.1) inclines upwards.

5. The dual-seat cradle infant car according to claim 1, wherein: the second seat (1.2) comprises a second frame (1001), a backrest (1002), turning plates (1003), connecting plates (1004), pressure spring screws (1005), bead pushing springs (1006), a bead pushing spring (1007), a spring plate (1008), a top hook (1009), a positioning frame (1010), a second slot frame (1011), a second button (1012), a second wedge block (1013), a second nut (1014), a second ejector rod (1015), a second hook spring (1016), a second set screw (1017) and a second hook (1018), wherein the second frame (1001) is a main body supporting structure of the second seat (1.2), the turning plates (1003) are rotatably connected with the second frame (1001) through the two connecting plates (1004), the backrest (1002) can slide on the rear end of the second frame (1001) and can slide on the rear end of the second frame (1001) through the pressure spring screws (1005), the bead pushing springs (1006), the bead pushing springs (1007), the spring plate (1008), the top hook (1009), The positioning mechanism formed by the positioning frame (1010) realizes the position adjustment and positioning of the backrest (1002) so that infants with different body sizes and heights can be adjusted to comfortable sitting postures, when the backrest (1002) is at the lowest end position, the turnover plate (1003) turns forwards to enable the bottom of the second seat (1.2) to form a flat plane for the infants to lie down and play, the turnover plate (1003) turns backwards to enable the second seat (1.2) to become a protective vehicle for the infants to learn to walk, the upper end of the second slot frame (1011) and the upper end of the rear side of the second frame (1001) form a revolute pair, the lower end of the second slot frame (1011) adjusts the pitching inclination angle of the second seat (1.2) through an adjusting mechanism formed by the second wedge block (1013), the second nut (1014) and the second ejector rod (1015), so that the second seat (1.2) can bring comfortable sitting postures for the infants with different preferences, and the second slot frame (1011) experiences, The modular quick-insertion structure formed by the second button (1012), the second hook spring (1016), the second set screw (1017) and the second hook (1018) can realize efficient and quick connection and separation of the second seat (1.2) and the frame mechanism (2).

6. The dual-seat cradle infant car according to claim 5, wherein: mesh enclosure barriers with good ventilation effect are arranged on two sides of the second frame (1001), a transverse handrail and an upright baffle plate are arranged at the front end of the second frame for protecting the safety of infants, two rectangular square holes with round corners are longitudinally arranged on the bottom side of the second frame (1001), two connecting plates (1004) and the turning plate (1003) and the second frame (1001) form a revolute pair, so that the turning plate (1003) and the second frame (1001) form a rotary connection, two guide rods (1001.2) are arranged in the rear end of the second frame (1001), two guide holes arranged on the rear side of the backrest (1002) are matched and installed with the two guide rods (1001.2), the backrest (1002) can slide up and down relative to the second frame (1001), and the shape and the size of a seat plate (1002.1) arranged at the bottom end of the backrest (1002) are the same as those of the rectangular square holes arranged at the rear end of the bottom side of the second frame (1001);

in an initial state, the turning plate (1003) is turned forwards to cover the rectangular square hole in the front end of the second frame (1001), the backrest (1002) is located at the lowest position, so that the seat plate (1002.1) covers the rectangular square hole in the rear end of the second frame (1001), and the bottom of the second seat (1.2) forms a flat plane for an infant to lie on and play;

a top rod seat (1001.5) is arranged at the rear side of the second frame (1001), a revolute pair is formed by the upper end of the left side of a second slot frame (1011) and the upper end of the rear side of the second frame (1001), a rectangular groove is arranged at the upper end of the right side of the second slot frame (1011), two rectangular jacks are arranged at the upper end of the rectangular groove, a hook cavity and a transverse button hole are arranged inside the lower end of the second slot frame (1011), a second hook (1018) is arranged in the hook cavity and can slide up and down in the hook cavity, an inclined plane structure is arranged at the upper end of the second hook (1018), a rectangular opening is arranged at the middle position, an inclined plane is arranged at the lower side of the second button (1012), the second button (1012) passes through the rectangular opening in the middle of the second hook (1018) and is arranged in the button hole of the second slot frame (1011), two threaded holes communicated with the hook cavity are arranged at the lower end of the second slot frame (1011), and two second set screws (, two second hook springs (1016) are respectively arranged between two second set screws (1017) and a second hook (1018), the left end of the second ejector rod (1015) and the ejector rod seat (1001.5) form a revolute pair, and a threaded structure at the right end, two second wedge-shaped blocks (1013) and two second nuts (1014) clamp the lower end of the second slot frame (1011);

in an initial state, under the action of the elastic force of a second hook spring (1016), a second hook (1018) is positioned at the upper end of a hook cavity, an inclined plane structure at the upper end of the second hook (1018) extends into a rectangular groove at the upper end of the right side of a second slot rack (1011), and an inclined plane at the lower side of a second button (1012) is pressed leftwards to push the second hook (1018) to move downwards so that the inclined plane structure at the upper end of the second hook (1018) retracts into the hook cavity; after the pressing of the second button (1012) is released, the second hook (1018) is restored to the initial position under the action of the elastic force of the second hook spring (1016);

the second set screw (1017) and the second slot frame (1011) form a thread pair connection, the compression amount of the second hook spring (1016) can be changed by adjusting the position of the second set screw (1017), and therefore the pressing and rebounding force of the second button (1012) can be adjusted;

the adjustment of the pitch angle of the second seat (1.2) can be realized by adjusting the positions of two second nuts (1014) on the second mandril (1015): when the two second nuts (1014) move leftwards on the second top rod (1015), the front end of the second seat (1.2) inclines downwards, and when the two second nuts (1014) move rightwards on the second top rod (1015), the front end of the second seat (1.2) inclines upwards.

7. The dual-seat cradle infant car according to claim 5, wherein: a cavity structure is arranged at the rear end of the second frame (1001), a rotatable lower blocking wheel (1001.1) is arranged at the lower end of the front side of the cavity structure, a ratchet bar (1001.3) is longitudinally arranged at the rear side of the cavity structure, a rotatable upper blocking wheel (1001.4) is arranged at the upper end of the ratchet bar (1001.3), the positioning frame (1010) is fixedly connected with the backrest (1002) through screws, a front top surface (1009.1) is arranged at the front side of the top hook (1009), a rear top surface (1009.2) is arranged at the lower end of the rear side, the top hook (1009) is arranged in the positioning frame (1010) and forms a revolute pair, two spring pieces (1008) are arranged between the positioning frame (1010) and the top hook (1009), the top hook (1009) has a counterclockwise rotation trend under the elastic action of the spring pieces (1008), a threaded hole is arranged at the top end of the positioning frame (1010), a top bead (1007) is arranged at the lower end of the threaded hole and, a ball ejecting spring (1006) is arranged between the pressure spring screw (1005) and the ball ejecting (1007), the compression amount of the ball ejecting spring (1006) can be changed by adjusting the position of the pressure spring screw (1005) in the threaded hole, so that the resilience force of the ball ejecting (1007) is adjusted, and the lower end of the top hook (1009) can be meshed with the teeth of the ratchet (1001.3), so that the positioning of the height position of the backrest (1002) is realized;

in an initial state, under the action of the elasticity of the spring piece (1008), the top end of the top hook (1009) is positioned on the left side of the top bead (1007); when the height of the seat plate (1002.1) needs to be adjusted, the backrest (1002) is pulled upwards, the lower end of the top hook (1009) can jump from bottom to top between teeth of the ratchet rack (1001.3), the upper end of the top hook (1009) is always positioned in the left area of the top bead (1007) in the process, the backrest (1002) stops being pulled upwards after the seat plate (1002.1) moves to a proper height position, the lower end of the top hook (1009) is clamped between the teeth of the corresponding ratchet rack (1001.3) and cannot move downwards, and therefore the height adjustment and positioning of the seat plate (1002.1) are completed;

when the height of the seat plate (1002.1) needs to be lowered, the backrest (1002) is pulled upwards to the highest position, in the process, the front top surface (1009.1) of the top hook (1009) moves upwards and contacts the upper baffle wheel (1001.4), under the pushing of the upper baffle wheel (1001.4), the top hook (1009) rotates clockwise to enable the upper end of the top hook to be compressed and cross the top bead (1007) to reach the right side interval of the top bead (1007), under the blocking action of the top bead (1007), the upper end of the top hook (1009) cannot spontaneously cross the top bead (1007) to reach the left side interval, at the moment, the lower end of the top hook (1009) is disengaged from the ratchet rack (1001.3), so that the seat plate (1002.1) can smoothly slide downwards, when the seat plate (1002.1) slides to the lowest end position, the lower baffle wheel (1001.1) can prop against the rear top surface (1009.2) of the top hook (1009), under the pushing action of the lower baffle wheel (1001.1), the top hook (1009) rotates anticlockwise, the upper end of the top hook compresses and the top bead reaches the left side interval (1007), thereby restoring the initial state and continuing to adjust the seat plate (1002.1) to the proper height.

8. The dual-seat cradle infant car according to claim 1, wherein: the frame mechanism (2) comprises a first swing rod (201), a top cover (202), a first upright post (203), a first sliding sleeve (204), a first spring (205), a second upright post (206), a pneumatic rod switch (207), a lower connecting rod (208), an upper connecting rod (209), a pneumatic rod (210), a fixed upright post (211), a second spring (212), a second sliding sleeve (213), a third upright post (214), a locking wrench (215), a cradle inserted bar (216), an inserted bar spring (217), a top swinging sleeve (218), a tail swinging sleeve (219), a second swing rod (220) and a transverse connecting rod (221), the frame mechanism (2) can realize the modular connection with the first seat (1.1) through the first swing rod (201), realize the modular connection with the second seat (1.2) through the second swing rod (220), and realize the synchronous transverse function based on the pendulum effect of the cradle by the first seat (1.1) and the second seat (1.2) through the transverse connecting rod (221), the first upright post (203) is of a T-shaped structure, a locking wrench (215) positioned at the left side position of the upper end of the first upright post (203) can realize the locking of the cradle function of the first seat (1.1) and the second seat (1.2) through a cradle inserted bar (216), the first upright post (203) can rotate relative to the second upright post (206) and is locked at the rotating position through a first sliding sleeve (204), a lower connecting rod (208) and an upper connecting rod (209) are arranged between the second upright post (206) and a third upright post (214), the fourth upright post forms a parallelogram structure, a pneumatic rod (210) is arranged between the lower connecting rod (208) and an upper connecting rod (209) through a top swinging sleeve (218) and a tail swinging sleeve (219) and is used for adjusting the height of the second upright post (206), the lower end of the fixed upright post (211) is tightly connected with the chassis mechanism (3), and the third upright post (214) can rotate relative to the fixed upright post (211), and the rotating position is locked by the second sliding sleeve (213).

9. The dual-seat cradle infant car according to claim 8, wherein: the structure of the first swing rod (201) is the same as that of the second swing rod (220), the left end of the first swing rod (201) is of a rectangular plate structure, two insert plates (201.1) are arranged at the upper end of the rectangular plate structure, the right end of the first swing rod (201) is of a round shaft structure, a round hole is vertically formed in the upper side of the round shaft structure, the round shaft structure and the left end of the upper side of the first upright post (203) form a revolute pair through a bearing, the round shaft structure at the right end of the second swing rod (220) and the right end of the upper side of the first upright post (203) form a revolute pair through a bearing, the left end of the transverse connecting rod (221) and the first swing rod (201) form a revolute pair, the right end and the second swing rod (220) form a parallelogram structure, a round hole is vertically formed in the left end of the first upright post (203), the insert rods (216) are coaxially arranged in the round hole of the ladder and form a, the plunger spring (217) is arranged between the upper end of the first upright post (203) and the cradle plunger (216), the lower end of the locking wrench (215) and the upper end of the cradle plunger (216) form a revolute pair, and the top cover (202) is arranged at the left end of the upper side of the first upright post (203);

the left end rectangular plate structure of the first swing rod (201) can be embedded into the rectangular groove of the first slot frame (124), two inserting plates (201.1) at the upper end of the rectangular plate structure are inserted into two rectangular inserting holes at the upper end of the rectangular groove of the first slot frame (124), and the first hook (123) can hook the lower edge of the rectangular plate structure, so that the modular connection of the first seat (1.1) and the frame mechanism (2) is realized; the first hook (123) can be retracted by pressing the first button (112), so that the connection between the first seat (1.1) and the frame mechanism (2) can be released; the modular connection principle of the second seat (1.2) and the frame mechanism (2) through the second swing rod (220) is the same as that described above;

in the initial state, the locking wrench (215) is in a vertical state, the cradle inserted link (216) is downwards inserted into the round hole on the upper side of the round shaft structure at the right end of the first swing link (201) under the action of the elastic force of the inserted link spring (217), so that the cradle function of the first seat (1.1) and the second seat (1.2) is locked, after the locking wrench (215) is pulled backwards to a horizontal state, the cradle inserted link (216) upwards moves and is separated from the round hole on the upper side of the round shaft structure at the right end of the first swing link (201) and is kept, and therefore the cradle function of the first seat (1.1) and the second seat (1.2) can be recovered.

10. The dual-seat cradle infant car according to claim 8, wherein: the lower end of the first upright post (203) is provided with an external spline, the upper end of the second upright post (206) forms a revolute pair with the lower end of the first upright post (203) through two deep groove ball bearings and a thrust ball bearing, the position of the second upright post (206) close to the upper end is provided with an external spline, the upper end and the lower end inside the first sliding sleeve (204) are provided with internal splines, the internal splines at the lower end of the first sliding sleeve are matched with the external splines on the second upright post (206) to form a revolute pair, so that the first sliding sleeve (204) can slide on the second upright post (206) and cannot rotate, the internal splines at the upper end inside the first sliding sleeve (204) can be matched with the external splines at the lower end of the first upright post (203), and a first spring (205) is arranged between the lower;

in an initial state, under the action of the elastic force of a first spring (205), an internal spline at the upper end of the first sliding sleeve (204) is always matched with an external spline at the lower end of the first upright post (203), so that the rotation of the first upright post (203) relative to the second upright post (206) is locked; when the first upright post (203) needs to be rotated, the first sliding sleeve (204) can be pressed downwards, so that the inner spline at the upper end of the first sliding sleeve is separated from the matching with the outer spline at the lower end of the first upright post (203), the first upright post (203) can be rotated to a proper angle, and then the pressing of the first sliding sleeve (204) is released, so that the inner spline at the upper end of the first sliding sleeve is matched with the outer spline at the lower end of the first upright post (203), and the position of the first upright post (203) is locked;

the lower end of a third upright post (214) is provided with an external spline, the upper end of a fixed upright post (211) forms a revolute pair with the lower end of the third upright post (214) through two deep groove ball bearings and a thrust ball bearing, the position of the fixed upright post (211) close to the upper end is provided with the external spline, the upper end and the lower end in a second sliding sleeve (213) are both provided with the internal spline, the internal spline at the lower end of the second sliding sleeve is matched with the external spline on the fixed upright post (211) to form a revolute pair, so that the second sliding sleeve (213) can slide on the fixed upright post (211) but cannot rotate, the internal spline at the upper end in the second sliding sleeve (213) can be matched with the external spline at the lower end of the third upright post (214), and a second spring (212;

in an initial state, under the action of the elastic force of the second spring (212), the internal spline at the upper end of the second sliding sleeve (213) is always matched with the external spline at the lower end of the third upright post (214), so that the third upright post (214) is locked to rotate relative to the fixed upright post (211); when the third upright post (214) needs to be rotated, the second sliding sleeve (213) can be pressed downwards, so that the inner spline at the upper end of the second sliding sleeve is separated from the matching with the outer spline at the lower end of the third upright post (214), the third upright post (214) can be rotated to a proper angle, and then the pressing on the second sliding sleeve (213) is released, so that the inner spline at the upper end of the second sliding sleeve is matched with the outer spline at the lower end of the third upright post (214), and the position of the third upright post (214) is locked;

after the second sliding sleeve (213) is pressed downwards and the third upright post (214) is rotated by 180 degrees, the pressing on the second sliding sleeve (213) is released, so that the position of the third upright post (214) is locked, the first seat (1.1) and the second seat (1.2) can be changed from the front direction to the back direction, and the infant can be changed from the back to the parent-facing state;

the left ends of an upper connecting rod (209) and a lower connecting rod (208) form a revolute pair with a third upright post (214), the right ends of the upper connecting rod (209) and the lower connecting rod (208) form a revolute pair, the upper connecting rod (209) is installed on the upper side of the lower connecting rod (208), the upper connecting rod (209), the lower connecting rod (208), the second upright post (206) and the third upright post (214) form a parallelogram structure, the upper end of a pneumatic rod (210) forms a revolute pair with the upper connecting rod (209) through a top swing sleeve (218), the lower end of the pneumatic rod (210) forms a revolute pair with the lower connecting rod (208) through a tail swing sleeve (219), and a pneumatic rod switch (207) is installed at the top end of the pneumatic rod (210) and forms a revolute pair with the;

when the first seat (1.1) and the second seat (1.2) are in an unloaded state, the air pressure rod switch (207) is turned downwards to enable the air pressure rod (210) to extend, so that the position of the second upright post (206) is raised, and the first seat (1.1) and the second seat (1.2) are raised; when the air pressure rod switch (207) is turned downwards, the first upright post (203) is pressed downwards, the air pressure rod (210) can be contracted, the first seat (1.1) and the second seat (1.2) are lowered, the length of the air pressure rod (210) can be locked by releasing the air pressure rod switch (207), and the height positions of the first seat (1.1) and the second seat (1.2) can be locked.

Technical Field

The invention relates to the field of baby carriages, in particular to a double-seat cradle baby carriage.

Background

The baby carriage is a walking tool for babies, and the space in the baby carriage body can be used for the babies to sit, lie and the like, so that the baby carriage greatly facilitates the traveling activities of parents carrying the babies, and provides comfortable sitting and growing space for the babies; when the baby is small, the baby still needs to lie down when going out, and the baby carriage with the soft shock absorption and the high carriage style is more convenient for parents to take care of the baby; when the infant is large, the infant can eat some coarse cereals, a high dining chair is usually used for feeding the infant conveniently, a safety vehicle for assisting the infant to walk is needed in the learning and walking stage of the infant, the activity amount is large at the moment, and therefore the infant vehicle with a lower gravity center is needed to be used for preventing the infant vehicle from overturning or falling down to cause large damage; in the process of using the baby carriage, some babies face parents to have a sense of safety, and other babies face forwards to facilitate observation of fresh things along the way, so that the baby carriage is required to have a function of adjusting the direction of the seat; the existing baby carriage has single function, and generally becomes an idle product due to the fact that the service life of the baby carriage can not meet the growth requirements of infants about one year; moreover, most of the existing baby carriages do not have the function of a cradle, and parents can only hold the baby to shake when the baby cries due to the emotions of fussy or boring, so that the crying of the baby can be stopped, which can increase the physical burden of the parents and the inconvenience in movement.

For satisfying the different demands of each growth stage of infant, especially twins infant's growth demand, purchase a plurality of perambulator and supplementary chair can lead to the family to purchase the expense increase, causes the waste of resource, also occupies more indoor parking space, along with life style's change, the consumer also appears diversified demand to the perambulator, and the product of function singleness can not satisfy people to the diversified demand of perambulator.

The invention patent with publication number CN102616263A discloses a cradle type multifunctional baby carriage, wherein the lower end of the basket body is provided with a basket body seat, the upper side of the basket plate is provided with a basket body groove, and the basket body seat can rotate in the basket body groove, so as to realize the cradle function of the longitudinal swing of the basket body; in addition, because the cradle swings longitudinally, the infant can have a head-foot high state when using the cradle, and the infant can show different degrees of tension or fear in the state, which can generate adverse effects on the fragile psychology of the infant.

Disclosure of Invention

In order to solve the defects of the prior art, the invention aims to provide a double-seat cradle baby carriage which is novel in structure, rich in functions and convenient to operate.

The technical scheme adopted by the invention is as follows: the utility model provides a two-seater cradle perambulator, includes first seat, second seat, frame mechanism, chassis mechanism, handrail frame, its characterized in that: the first seat and the second seat can adjust the pitching inclination angle and provide a comfortable sitting and lying space for the infant, the inner parts of the first seat and the second seat can form a flat plane to facilitate the infant to lie and play, the inclination angle of the backrest of the first seat can be adjusted according to the preference of the infant, the height of the seat plate of the second seat can be adjusted according to the body type of the infant, the upper end of the frame mechanism and the rear ends of the first seat and the second seat can be connected and separated through a modularized quick-insertion structure, the frame mechanism adopts a multi-connecting-rod structure, the height and direction adjustment of the first seat and the second seat can be conveniently realized, the frame mechanism has great flexibility and convenience, meanwhile, the transverse cradle function of the first seat and the second seat can be realized according to the pendulum effect, the lower end of the frame mechanism is fixedly connected with the chassis mechanism, the lower end of the armrest frame is fixedly connected with the chassis mechanism, and the chassis mechanism is provided with, the parents accessible handrail frame realizes controlling perambulator.

The first seat comprises a first frame, a rear turning plate, a pressure plate, a front turning plate, a first insert rod, a first spring, a first connecting rod, a second spring, a second insert rod, a first positioning cover, a first knob, a second positioning cover, a third insert rod, a third spring, a third connecting rod, a fourth spring, a fourth insert rod, a spring leaf, a pressure plate hook, a first button, a first hook, a first slot frame, a first wedge-shaped block, a first nut, a first ejector rod, a first hook spring and a first set screw, wherein the first frame is a main body supporting structure of the first seat, a seat plate and a transverse armrest are arranged at the front end of the first frame, a rotating pair is formed by the front turning plate and the seat plate, and a positioning mechanism formed by the first insert rod, the first spring, the first connecting rod, the second spring, the second insert rod and the first knob locks the inclination angle of the front turning plate to provide a comfortable backrest for infants, the first positioning cover covers the outer side of the positioning mechanism, the rear turning plate and the front turning plate form a revolute pair, the locking of the rear turning plate relative to the front turning plate is realized through a locking mechanism formed by a pressing plate, a pressing plate hook and a spring piece, the inclination angle of the rear turning plate can be locked when the front turning plate is in a horizontal state through the positioning mechanism formed by a second knob, a third inserted link, a third spring, a third connecting link, a fourth spring and a fourth inserted link, the second positioning cover covers the outer side of the positioning mechanism, the first slot frame and the first frame form a revolute pair, the pitching inclination angle of the first seat is adjusted through an adjusting mechanism formed by a first wedge block, a first nut and a first ejector rod at the lower end of the first slot frame, so that the first seat can bring comfortable sitting experience for infants with different preferences, and the first slot frame, the first button, the first hook spring, the first fastening screw, the second button, the second hook, the modular quick-insertion structure formed by the first hooks can realize efficient and quick connection and separation of the first seat and the frame mechanism.

Preferably, six pairs of front positioning holes are formed in two sides of the middle of the first frame, the six pairs of front positioning holes are formed in the two sides of the middle of the first frame, the five pairs of rear positioning holes are formed in the two sides of the rear end of the first frame, a seat plate is arranged at the front end of the first frame, a rotating pair is formed by the lower end of a front turning plate and the rear end of the seat plate, a front plate upright post, a front plate left socket and a front plate right socket are arranged on the rear side of the front turning plate, two shifting posts are arranged on the upper side and the lower side of the front end of the first knob, and form a rotating pair with the front plate upright post; the second inserted bar is installed in the front plate right socket and constitutes the sliding pair, the second spring is installed between the second inserted bar and the front plate right socket, under the action of the second spring elasticity, the second inserted bar is always located at the right end position of the front plate right socket, and the second connecting rod is installed between the left end of the second inserted bar and the lower side shifting column at the front end of the first knob and constitutes the sliding pair with the rear two.

When the front turning plate is in a natural state, the first inserting rod and the second inserting rod are respectively inserted into a pair of front positioning holes at two sides of the first frame under the action of elastic force of the first spring and the second spring, when the inclination angle of the front turning plate needs to be adjusted, the first knob is twisted clockwise, the first inserting rod moves rightwards under the action of the tensile force of the first connecting rod and the second connecting rod, the second inserting rod moves leftwards, after the first inserting rod and the second inserting rod are separated from the front positioning holes, the front turning plate can be adjusted to a proper inclined position, the twisting of the first knob is released, the first inserting rod and the second inserting rod are inserted into the front positioning holes at new positions, and the inclination angle adjusting action of the front turning plate can be completed; when the first inserted link and the second inserted link are inserted into the pair of front positioning holes at the lowest end, the front turning plate and the seat plate form a plane.

Preferably, the lower end of the rear turning plate and the upper end of the front turning plate form a revolute pair, the two pressure plate hooks are arranged at the upper end of the front turning plate and form the revolute pair, the spring leaf is arranged between the lower end of the pressure plate hook and the front turning plate, the two pressure plates are fixedly arranged at the lower end of the rear turning plate through screws, the rear turning plate rotates anticlockwise relative to the front turning plate until the rear turning plate and the front turning plate form a plane, the two pressure plates can be clamped into the two pressure plate hooks, and the pressure plate hooks press the pressure plates under the action of the elasticity of the spring leaf, so that; the lower ends of the two pressure plate hooks are pressed to rotate anticlockwise, and after the pressure plates are separated from the pressure plate hooks, the rotation of the rear turning plate relative to the front turning plate can be restored.

Preferably, a rear plate upright post, a rear plate right socket and a rear plate left socket are arranged on the rear side of the rear turning plate, two shifting posts are arranged on the upper side and the lower side of the front end of the second knob and form a revolute pair with the rear plate upright post, a third insertion rod is installed in the rear plate right socket and form a revolute pair, a third spring is installed between the third insertion rod and the rear plate right socket, the third insertion rod is always positioned at the right end position of the rear plate right socket under the action of the elastic force of the third spring, and a third connecting rod is installed between the left end of the third insertion rod and the shifting posts on the lower side of the front end of the second knob and forms a revolute pair with the rear two insertion rods; the fourth inserted bar is installed in the left socket of the rear plate and forms a sliding pair, the fourth spring is installed between the fourth inserted bar and the left socket of the rear plate, the fourth inserted bar is always positioned at the left end position of the left socket of the rear plate under the action of the elastic force of the fourth spring, and the fourth connecting rod is installed between the right end of the fourth inserted bar and the shifting column on the upper side of the front end of the second knob and forms a sliding pair with the rear inserting bar and the shifting column.

Preferably, after the front turning plate and the seat plate form a plane, in a natural state, a third insertion rod and a fourth insertion rod are respectively inserted into a pair of rear positioning holes under the elastic force action of a third spring and a fourth spring, when the inclination angle of the rear turning plate needs to be adjusted, a second knob is twisted clockwise, under the tension action of a third connecting rod and a fourth connecting rod, the third insertion rod moves leftwards, the fourth insertion rod moves rightwards, after the third insertion rod and the fourth insertion rod are separated from the rear positioning holes, the rear turning plate can be adjusted to a proper inclination position, the twisting of the second knob is released, the third insertion rod and the fourth insertion rod are inserted into the rear positioning holes at new positions, and the inclination angle adjustment action of the rear turning plate can be completed; when the third inserted link and the fourth inserted link are inserted into the pair of rear positioning holes at the lowest end, the rear turning plate, the front turning plate and the seat plate can form a plane for the infant to have a rest in a lying mode.

Preferably, the rear side of the first frame is provided with a connecting seat and a top rod seat, the upper end of the left side of the first slot frame and the connecting seat form a revolute pair, the upper end of the right side of the first slot frame is provided with a rectangular groove, the upper end of the rectangular groove is provided with two rectangular jacks, the lower end of the first slot frame is internally provided with a hook cavity and a transverse button hole, the first hook is arranged in the hook cavity and can slide up and down in the hook cavity, the upper end of the first hook is provided with an inclined plane structure, the middle position of the first hook is provided with a rectangular opening, the lower side of the first button is provided with an inclined plane, the first button passes through the rectangular opening in the middle of the first hook and is arranged in the button hole of the first slot frame, the lower end of the first slot frame is provided with two threaded holes communicated with the hook cavity, the two first set screws are respectively arranged in, the left end of the first ejector rod and the ejector rod seat form a revolute pair, and the threaded structure at the right end, the two first wedge-shaped blocks and the two first nuts clamp the lower end of the first slot frame together.

In an initial state, under the action of the elastic force of a first hook spring, the first hook is positioned at the upper end of the hook cavity, an inclined plane structure at the upper end of the first hook extends into a rectangular groove at the upper end of the right side of the first slot frame, and a lower inclined plane of a first button is pressed leftwards to push the first hook to move downwards, so that the inclined plane structure at the upper end of the first hook retracts into the hook cavity; after the pressing of the first button is released, the first hook is restored to the initial position under the action of the elastic force of the first hook spring.

First holding screw and first slot framework become screw thread pair and be connected, and the accessible is adjusted first holding screw's position and is changed the decrement of first couple spring to the realization is pressed and is kick-backed the regulation of dynamics to first button.

The adjustment of the pitch angle of the first seat can be realized by adjusting the positions of the two first nuts on the first mandril: the two first nuts move leftwards on the first ejector rod, so that the front end of the first seat inclines downwards, and the two first nuts move rightwards on the first ejector rod, so that the front end of the first seat inclines upwards.

The second seat comprises a second frame, a backrest, a turning plate, connecting plates, a pressure spring screw, a bead-pushing spring, a spring leaf, a top hook, a positioning frame, a second slot frame, a second button, a second wedge-shaped block, a second nut, a second ejector rod, a second hook spring, a second set screw and a second hook, the second frame is a main body supporting structure of the second seat, the turning plate is rotationally connected with the second frame through the two connecting plates, the backrest can slide up and down at the rear end of the second frame, the position adjustment and the positioning of the backrest are realized through a positioning mechanism consisting of the pressure spring screw, the bead-pushing spring, the spring leaf, the top hook and the positioning frame, so that infants with different body sizes and body heights can be adjusted to a comfortable sitting posture, when the backrest is at the lowest end position, the turning plate turns forwards to form a flat plane at the bottom of the second seat for the infants to lie and turn over, and the second seat can become a protective vehicle for the infants to walk when the infants to study by turning backwards, second slot frame upper end constitutes the revolute pair with second frame rear side upper end, the every single move inclination that the second seat was adjusted to the adjustment mechanism that second slot frame lower extreme constitutes through second wedge, the second nut, the second ejector pin to make the second seat can bring comfortable experience of taking for the infant of different hobbies, by second slot frame, the second button, the second couple spring, the second holding screw, the modularization that the second couple constitutes inserts the structure soon and can realize that second seat and frame mechanism are high-efficient and quick is connected and separation.

Preferably, the two sides of the second frame are provided with mesh barriers with good ventilation effect, the front end of the second frame is provided with a transverse handrail and an upright baffle for protecting the safety of infants, the bottom side of the second frame is longitudinally provided with two rectangular square holes with round corners, the two connecting plates and the turning plate and the second frame form a revolute pair, so that the turning plate and the second frame form a rotary connection, the inside of the rear end of the second frame is provided with two guide rods, the two guide holes arranged on the rear side of the backrest are matched and installed with the two guide rods, the backrest can slide up and down relative to the second frame, and the shape and the size of the seat plate arranged at the bottom end of the backrest are the same as those of the rectangular square holes arranged on the rear end of the bottom side.

In the initial state, the turning plate is forwards turned to cover the rectangular square hole in the front end of the second frame, and the backrest is in the lowest position to enable the seat plate to cover the rectangular square hole in the rear end of the second frame, so that the bottom of the second seat forms a flat plane for an infant to lie down and play.

Preferably, the rear side of the second frame is provided with a mandril base, the upper end of the left side of the second slot frame and the upper end of the rear side of the second frame form a revolute pair, the upper end of the right side of the second slot frame is provided with a rectangular groove, the upper end of the rectangular groove is provided with two rectangular jacks, the lower end of the second slot frame is internally provided with a hook cavity and a transverse button hole, the second hook is arranged in the hook cavity and can slide up and down in the hook cavity, the upper end of the second hook is provided with an inclined plane structure, the middle position of the second hook is provided with a rectangular opening, the lower side of the second button is provided with an inclined plane, the second button passes through the rectangular opening in the middle of the second hook and is arranged in the button hole of the second slot frame, the lower end of the second slot frame is provided with two threaded holes communicated with the hook cavity, the two second set screws are respectively arranged, the left end of the second ejector rod and the ejector rod seat form a revolute pair, and the threaded structure at the right end, the two second wedge-shaped blocks and the two second nuts clamp the lower end of the second slot frame together.

In an initial state, under the action of the spring force of the second hook, the second hook is positioned at the upper end of the hook cavity, the inclined plane structure at the upper end of the second hook extends into the rectangular groove at the upper end of the right side of the second slot frame, and the inclined plane at the lower side of the second button is pressed leftwards to push the second hook to move downwards, so that the inclined plane structure at the upper end of the second hook is retracted into the hook cavity; after the pressing of the second button is released, the second hook is restored to the initial position under the action of the elastic force of the second hook spring.

The second holding screw and the second slot framework form a thread pair connection, the compression amount of the second hook spring can be changed by adjusting the position of the second holding screw, and therefore the pressing and rebounding force of the second button can be adjusted.

The adjustment of the pitch angle of the second seat can be realized by adjusting the positions of the two second nuts on the second ejector rod: the two second nuts move leftwards on the second ejector rod, then the front end of the second seat inclines downwards, and the two second nuts move rightwards on the second ejector rod, then the front end of the second seat inclines upwards.

Preferably, the rear end of the second frame is provided with a cavity structure, the lower end of the front side of the cavity structure is provided with a rotatable lower baffle wheel, the rear side of the cavity structure is longitudinally provided with a ratchet bar, the upper end of the ratchet bar is provided with a rotatable upper baffle wheel, the positioning frame is tightly connected with the backrest through a screw, the front side of the top hook is provided with a front top surface, the lower end of the rear side is provided with a rear top surface, the top hook is arranged in the positioning frame and forms a revolute pair, two spring pieces are arranged between the positioning frame and the top hook, the top hook has a tendency of anticlockwise rotation under the elastic force of the spring pieces, the top end of the positioning frame is provided with a threaded hole, the top ball is arranged at the lower end of the threaded hole and extends downwards, the pressure spring screw is arranged at the upper end of the threaded hole through a thread pair, a, thereby adjusting the resilience of the top bead, and the lower end of the top hook can be meshed with the teeth of the ratchet bar, thereby realizing the positioning of the height position of the backrest.

In an initial state, under the action of the elasticity of the spring piece, the top end of the top hook is positioned on the left side of the top bead; when the height of the seat plate needs to be adjusted, the backrest is pulled upwards, the lower end of the top hook can bounce upwards from bottom to top between the teeth of the ratchet bar, the upper end of the top hook is always located in the left area of the top bead in the process, the backrest stops being pulled upwards after the seat plate moves to a proper height position, the lower end of the top hook can be clamped between the teeth of the corresponding ratchet bar and cannot move downwards, and therefore the height adjustment and the positioning of the seat plate are completed.

When the height of the seat plate needs to be reduced, the backrest is pulled upwards to the highest position, the front top surface of the top hook can move upwards and contact with the upper blocking wheel in the process, the top hook can rotate clockwise to enable the upper end of the top hook to compress and cross the top bead under the pushing of the upper blocking wheel and reach the right interval of the top bead, the upper end of the top hook cannot spontaneously cross the top bead to reach the left interval under the blocking effect of the top bead, at the moment, the lower end of the top hook is separated from being meshed with the ratchet, the seat plate can smoothly slide downwards, when the seat plate slides to the lowest end position, the lower blocking wheel can abut against the rear top surface of the top hook, the top hook rotates anticlockwise under the thrust effect of the lower blocking wheel, the upper end of the top hook is compressed and crosses the top bead to reach the left interval, the initial state is recovered, and the seat plate can be continuously adjusted to the.

The frame mechanism comprises a first swing rod, a top cover, a first upright post, a first sliding sleeve, a first spring, a second upright post, a pneumatic rod switch, a lower connecting rod, an upper connecting rod, a pneumatic rod, a fixed upright post, a second spring, a second sliding sleeve, a third upright post, a locking wrench, a cradle inserted link, an inserted link spring, a top swing sleeve, a tail swing sleeve, a second swing rod and a transverse connecting rod, the frame mechanism can realize modular connection with a first seat through the first swing rod, realize modular connection with a second seat through the second swing rod, and realize synchronous transverse cradle functions based on the pendulum effect through the transverse connecting rod by the first seat and the second seat, the first upright post is of a T-shaped structure, the locking wrench positioned at the left side of the upper end of the first upright post can realize locking of the cradle functions of the first seat and the second seat through the cradle inserted link, the first upright post can rotate relative to the second upright post and is locked by the rotating position of the first sliding sleeve, the lower connecting rod and the upper connecting rod are arranged between the second upright post and the third upright post, the upper connecting rod and the lower connecting rod form a parallelogram structure, the air pressure rod is arranged between the lower connecting rod and the upper connecting rod through the top swing sleeve and the tail swing sleeve and used for adjusting the height of the second upright post, the lower end of the fixed upright post is fixedly connected with the chassis mechanism, the third upright post can rotate relative to the fixed upright post, and the rotating position is locked by the second sliding sleeve.

Preferably, the first swing link and the second swing link are identical in structure, the left end of the first swing link is of a rectangular plate structure, the upper end of the rectangular plate structure is provided with two insert plates, the right end of the first swing link is of a round shaft structure, a round hole is vertically formed in the upper side of the round shaft structure, the round shaft structure and the left end of the upper side of the first upright post form a rotating pair through a bearing, the round shaft structure at the right end of the second swing link and the right end of the upper side of the first upright post form a rotating pair through a bearing, the left end of the transverse connecting rod and the first swing link form a rotating pair, the right end and the second swing link form a rotating pair, the first swing link, the second swing link, the first upright post and the transverse connecting rod form a parallelogram structure, the left end of the upper side of the first upright post is vertically provided with a stepped round hole, the cradle insert rod is coaxially arranged in the stepped round hole and, the top cover is arranged at the left end of the upper side of the first upright post.

Preferably, the rectangular plate structure at the left end of the first swing rod can be embedded into the rectangular groove of the first slot frame, the two inserting plates at the upper end of the rectangular plate structure are inserted into the two rectangular inserting holes at the upper end of the rectangular groove of the first slot frame, and the first hook can hook the lower edge of the rectangular plate structure, so that the modular connection of the first seat and the frame mechanism is realized; the first hook can be retracted inwards by pressing the first button, so that the connection between the first seat and the frame mechanism can be released; the modular connection principle of the second seat and the frame mechanism through the second swing rod is the same as that described above.

When the cradle is in the initial state, the locking wrench is in the vertical state, the cradle inserted bar is downwards inserted into the round hole on the upper side of the round shaft structure at the right end of the first swing bar under the action of the spring force of the inserted bar spring, so that the cradle function of the first seat and the second seat is locked, and after the locking wrench is pulled backwards to the horizontal state, the cradle inserted bar upwards moves and is separated from and kept in the round hole on the upper side of the round shaft structure at the right end of the first swing bar, so that the cradle function of the first seat and the second seat can be recovered.

Preferably, the lower end of the first upright post is provided with an external spline, the upper end of the second upright post and the lower end of the first upright post form a revolute pair through two deep groove ball bearings and a thrust ball bearing, the position of the second upright post, which is close to the upper end, is provided with the external spline, the upper end and the lower end inside the first sliding sleeve are both provided with the internal spline, the internal spline at the lower end of the first sliding sleeve and the external spline on the second upright post form a sliding pair, so that the first sliding sleeve can slide on the second upright post and cannot rotate, the internal spline at the upper end inside the first sliding sleeve can be matched with the external spline at the lower end of the first upright post, and a first.

In an initial state, the internal spline at the upper end of the first sliding sleeve is always matched with the external spline at the lower end of the first upright post under the action of the elastic force of the first spring, so that the rotation of the first upright post relative to the second upright post is locked; when the first upright post needs to be rotated, the first sliding sleeve can be pressed downwards, so that the inner spline at the upper end of the first sliding sleeve is separated from the matching with the outer spline at the lower end of the first upright post, the first upright post can be rotated to a proper angle, then the pressing of the first sliding sleeve is released, the inner spline at the upper end of the first sliding sleeve is matched with the outer spline at the lower end of the first upright post, and the position of the first upright post is locked.

Preferably, the lower end of the third upright post is provided with an external spline, the upper end of the fixed upright post and the lower end of the third upright post form a revolute pair through two deep groove ball bearings and a thrust ball bearing, the fixed upright post is provided with an external spline near the upper end, the upper end and the lower end inside the second sliding sleeve are both provided with internal splines, the internal splines at the lower end of the second sliding sleeve and the external splines on the fixed upright post form a revolute pair in a matching manner, so that the second sliding sleeve can slide on the fixed upright post and cannot rotate, the internal splines at the upper end inside the second sliding sleeve can be matched with the external splines at the lower end of the third upright post, and a.

In an initial state, the internal spline at the upper end of the second sliding sleeve is always matched with the external spline at the lower end of the third upright post under the action of the elastic force of the second spring, so that the rotation of the third upright post relative to the fixed upright post is locked; when the third upright post needs to be rotated, the second sliding sleeve can be pressed downwards, so that the inner spline at the upper end of the second sliding sleeve is separated from the matching with the outer spline at the lower end of the third upright post, the third upright post can be rotated to a proper angle, then the pressing on the second sliding sleeve is released, the inner spline at the upper end of the second sliding sleeve is matched with the outer spline at the lower end of the third upright post, and the position of the third upright post is locked.

After the second sliding sleeve is pressed downwards and the third upright post is rotated by 180 degrees, the pressing of the second sliding sleeve is released, so that the position of the third upright post is locked, the first seat and the second seat can be changed from forward to backward, and the state of facing parents of the infant can be changed from back to back by facing the parents.

Preferably, the left ends of the upper connecting rod and the lower connecting rod form a revolute pair with the third upright, the right ends of the upper connecting rod and the lower connecting rod form a revolute pair with the second upright, the upper connecting rod is mounted on the upper side of the lower connecting rod, the upper connecting rod, the lower connecting rod, the second upright and the third upright form a parallelogram structure, the upper end of the pneumatic rod forms a revolute pair with the upper connecting rod through the top swing sleeve, the lower end of the pneumatic rod forms a revolute pair with the lower connecting rod through the tail swing sleeve, and the pneumatic rod switch is mounted at the top end position of the pneumatic rod and forms a.

When the first seat and the second seat are in an idle state, the air pressure rod switch is turned downwards to enable the air pressure rod to extend, so that the position of the second upright post is raised, and the first seat and the second seat are raised; when the switch of the air pressure rod is turned downwards, the first upright post is pressed downwards, the air pressure rod can be contracted, the first seat and the second seat are lowered, the length of the air pressure rod can be locked by loosening the switch of the air pressure rod, and the height positions of the first seat and the second seat are locked.

The invention has the beneficial effects that:

one baby carriage can meet the requirement of twins or two babies with small age difference for going out simultaneously, compared with two common baby carriages, the baby carriage has the advantages of reduced purchasing cost, saved storage space, capability of completing the care of two babies by one parent and convenient use.

The heights of the two seats can be adjusted according to the requirements of infants, and when a small infant is born, the positions of the seats can be properly adjusted to be high, so that parents can conveniently look after the seats; when the infant is bigger, the seat can be properly lowered, the overall gravity center is lowered, and the riding safety is improved.

And thirdly, the height of the seat is adjusted by adopting a pneumatic rod structure, so that the operation is convenient, the pneumatic rod has a certain damping and buffering effect, and the riding comfort of the seat is improved.

The inclination angle of the backrest of the first seat can be adjusted according to needs, so that infants with different body types can keep comfortable sitting postures, the inclination angle of the front turning plate can be adjusted only by twisting the first knob, and the operation is convenient.

The rear turnover plate of the first seat can be locked to form a leveling surface with the front turnover plate, so that an infant can lean against the seat conveniently, the seat plate and the front turnover plate can form a leveling surface, the infant can lie conveniently, the inclination angle of the rear turnover plate can be independently adjusted, and the head of the infant can be supported conveniently when the infant lies.

The height of the seat plate in the second seat can be adjusted to a comfortable height according to the body type and the preference of the infant, the height adjustment of the seat plate has an automatic resetting function, an additional switch is not needed for locking, and the seat plate is simple to operate, convenient to use and stable and reliable in positioning.

The directions of the two seats can be changed, the infant can have a wide visual field when the seat faces forwards, and the infant can face the parents when the seat faces backwards, so that the feeling of safety of the infant is increased, and the parents can conveniently communicate and interact with the infant.

The two seats have the function of a cradle, can realize transverse swinging according to the pendulum effect, cannot have the risk of sudden descending in the swinging process of the seats, cannot have the state of low head and high feet to ensure that the infants are uneasy and nervous, can effectively prevent the infants from crying and screaming caused by the emotions of fussy or boring and the like, and relieves the burden of parents.

And ninthly, the locking spanner is pulled to lock and unlock the swing of the swing rod, so that the cradle swing function of the two seats can be locked or unlocked, the cradle function can be locked when the baby carriage is moved, the safety is improved, the cradle function can be unlocked when the baby cry and scream, and the operation is quick and convenient.

Two seats in the R and frame accessible modularization coupling mechanism carry out quick and firm connection, have not only improved the packaging efficiency, also can be according to actual need quick and conveniently change other seats that adopt the same connection module, improve perambulator's interchangeability.

The pitching inclination angles of the two seats can be adjusted according to the preference of the infant, so that the sitting comfort of the seats is improved.

The first upright post can be locked by the first sliding sleeve relative to the rotation of the second upright post, the third upright post can be locked by the second sliding sleeve relative to the rotation of the fixed upright post, the locking structure is convenient to operate, simple and reliable, the minimum unit of the rotation angle can be changed by changing the number of the spline teeth, namely, the first upright post and the third upright post can be locked after rotating any angle under the condition that the number of the spline teeth is enough.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of two seats facing rearward.

Fig. 3 is a schematic view of the overall structure of the first seat.

Fig. 4 is a schematic view of the overall structure of the first seat.

Fig. 5 is an exploded view of the first seat.

Fig. 6 is a schematic view of the overall structure of the second seat.

Fig. 7 is a schematic view of the overall structure of the second seat.

Fig. 8 is an exploded view of the second seat.

Fig. 9 is a schematic view showing a state after the seat plate is raised.

Fig. 10 is a schematic view showing a state where the seat is lowered.

Fig. 11 is an exploded view of the frame mechanism.

Fig. 12 is a schematic view of the two seat bassinet functional locked state.

Fig. 13 is a schematic view of the two seat cradles in a functional open state.

Fig. 14 is a schematic view of the rotation-locked state of the first column.

Fig. 15 is a schematic view of the first column in a rotatable state.

Fig. 16 is a schematic view of the rotation-locked state of the third column.

Fig. 17 is a schematic view of the third column in a rotatable state.

Reference numerals: 1.1 a first seat, 101 a first frame, 101.1 a seat plate, 101.2 a front positioning hole, 101.3 a rear positioning hole, 101.4 a top bar seat, 101.5 a connecting seat, 102 a rear turning plate, 102.1 a rear plate upright post, 102.2 a press plate, 102.3 a rear plate right socket, 102.4 a rear plate left socket, 103 a front turning plate, 103.1 a front plate upright post, 103.2 a front plate left socket, 103.3 a front plate right socket, 104 a first inserted bar, 105 a first spring, 106 a first connecting bar, 107 a second connecting bar, 108 a second spring, 109 a second inserted bar, 110 a first positioning cover, 111 a first knob, 112 a second knob, 113 a second positioning cover, 114 a third inserted bar, 115 a third spring, 116 a third connecting bar, 117 a fourth connecting bar, 118 a fourth inserted bar, 119 a fourth inserted bar, 120 a press plate hook, 121 a press plate hook, 122 a first button, 123 a first hook, 124 a first slot frame, 125 a first wedge-shaped block, 126, a first wedge-shaped hook nut, 129 a first top bar set screw;

1.2 a second seat, 1001 a second frame, 1001.1 a lower catch wheel, 1001.2 guide rods, 1001.3 a ratchet rod, 1001.4 an upper catch wheel, 1001.5 a top rod seat, 1002 a backrest, 1002.1 a seat plate, 1003 a turning plate, 1004 a connecting plate, 1005 a pressure spring screw, 1006 a top ball spring, 1007 a top ball, 1008 a spring leaf, 1009 a top hook, 1009.1 a front top surface, 1009.2 a rear top surface, 1010 a locating rack, 1011 a second slot rack, 1012 a second button, 1013 a second wedge block, 1014 a second nut, 1015 a second top rod, 1016 a second hook spring, 1017 a second set screw and 1018 a second hook;

2, a frame mechanism, a 201 first swing rod, a 201.1 inserting plate, a 202 top cover, a 203 first upright post, a 204 first sliding sleeve, a 205 first spring, a 206 second upright post, a 207 pneumatic rod switch, a 208 lower connecting rod, a 209 upper connecting rod, a 210 pneumatic rod, a 211 fixed upright post, a 212 second spring, a 213 second sliding sleeve, a 214 third upright post, a 215 locking wrench, a 216 cradle inserting rod, a 217 inserting rod spring, a 218 top swinging sleeve, a 219 tail swinging sleeve, a 220 second swing rod and a 221 transverse connecting rod;

3 chassis mechanisms and 4 handrail frames.

Detailed Description

The present invention will be further described with reference to specific examples, which are illustrative of the invention and are not to be construed as limiting the invention.

As shown in fig. 1, a double-seat cradle infant car comprises a first seat 1.1, a second seat 1.2, a frame mechanism 2, a chassis mechanism 3 and an armrest frame 4, and is characterized in that: the first seat 1.1 and the second seat 1.2 can adjust the pitching inclination angle, and can provide a comfortable sitting and lying space for the infant, the inner part of the first seat 1.1 can form a flat plane to facilitate the lying and playing of the infant, the inclination angle of the backrest of the first seat 1.1 can be adjusted according to the preference of the infant, the height of the seat plate of the second seat 1.2 can be adjusted according to the body type of the infant, the upper end of the frame mechanism 2 can be connected and separated with the rear ends of the first seat 1.1 and the second seat 1.2 through a modular quick-insertion structure, the frame mechanism 2 adopts a multi-link structure, the height and direction adjustment of the first seat 1.1 and the second seat 1.2 can be conveniently realized, the great flexibility and convenience are achieved, the transverse cradle function of the first seat 1.1.2 and the second seat 1.2 can be realized according to the pendulum effect, the lower end of the frame mechanism 2 is connected with the chassis mechanism 3 in a fastening way, the lower end of the armrest frame 4 is connected with the chassis mechanism 3 in, four wheels are arranged below the chassis mechanism 3, and parents can control the baby carriage through the handrail frame 4.

As shown in fig. 3 and 4, the first seat 1.1 includes a first frame 101, a rear-turning plate 102, a pressing plate 102.2, a front-turning plate 103, a first insertion rod 104, a first spring 105, a first connection rod 106, a second connection rod 107, a second spring 108, a second insertion rod 109, a first positioning cover 110, a first knob 111, a second knob 112, a second positioning cover 113, a third insertion rod 114, a third spring 115, a third connection rod 116, a fourth connection rod 117, a fourth spring 118, a fourth insertion rod 119, a spring plate 120, a pressing plate hook 121, a first button 122, a first hook 123, a first slot frame 124, a first wedge block 125, a first nut 126, a first push rod 127, a first hook spring 128, and a first set screw 129, the first frame 101 is a main body supporting structure of the first seat 1.1, a seat plate 101.1 and a transverse armrest are disposed at a front end of the first frame 101.1, the front-turning plate 103 and the seat plate 101.1 form a rotary auxiliary seat plate 104, and the auxiliary seat plate 101.1 passes through the first insertion rod 104, A positioning mechanism composed of a first spring 105, a first connecting rod 106, a second connecting rod 107, a second spring 108, a second inserting rod 109 and a first knob 111 locks the inclination angle of the front turning plate 103 to provide a comfortable leaning backrest for infants, a first positioning cover 110 covers the outer side of the positioning mechanism, the rear turning plate 102 and the front turning plate 103 form a revolute pair, the locking mechanism composed of a pressing plate 102.2, a pressing plate hook 121 and a spring piece 120 realizes the locking of the rear turning plate 102 relative to the front turning plate 103, the positioning mechanism composed of the second knob 112, a third inserting rod 114, a third spring 115, a third connecting rod 116, a fourth connecting rod 117, a fourth spring 118 and a fourth inserting rod 119 can lock the inclination angle of the rear turning plate 102 when the front turning plate 103 is in a horizontal state, a second positioning cover 113 covers the outer side of the positioning mechanism, a first slot frame 124 and a first frame 101 form a revolute pair, the lower end of the first slot 124 is connected with a first wedge-shaped block 125, The pitch inclination angle of the first seat 1.1 is adjusted by an adjusting mechanism composed of the first nut 126 and the first top bar 127, so that the first seat 1.1 can bring comfortable seating experience for infants with different preferences, and the modular quick-insertion structure composed of the first slot frame 124, the first button 122, the first hook spring 128, the first set screw 129 and the first hook 123 can realize efficient and quick connection and separation of the first seat 1.1 and the frame mechanism 2.

As shown in fig. 3, 4 and 5, six pairs of front positioning holes 101.2 are disposed on two sides of the middle of the first frame 101, which are equally spaced and distributed as arcs, five pairs of rear positioning holes 101.3 are disposed on two sides of the rear end, which are equally spaced and distributed as arcs, the front end of the first frame 101 is provided with a seat 101.1, the lower end of the front flip 103 and the rear end of the seat 101.1 form a revolute pair, the rear side of the front flip 103 is provided with a front upright 103.1, a front left socket 103.2 and a front right socket 103.3, two shift posts are disposed on the upper and lower sides of the front end of the first knob 111, which form a revolute pair with the front upright 103.1, the first insertion rod 104 is disposed in the front left socket 103.2 and forms a shift pair, the first spring 105 is disposed between the first insertion rod 104 and the front left socket 103.2, the first insertion rod 104 is always disposed at the left end of the front left socket 103.2 under the elastic force of the first spring 105, the first connection rod 106 is disposed between the right end of the first insertion rod 104 and the front shift post, and form revolute pair with the latter two; the second inserted link 109 is installed in the front board right socket 103.3 and constitutes a sliding pair, the second spring 108 is installed between the second inserted link 109 and the front board right socket 103.3, the second inserted link 109 is always located at the right end of the front board right socket 103.3 under the elastic force of the second spring 108, and the second connecting rod 107 is installed between the left end of the second inserted link 109 and the lower side of the front end of the first knob 111 and constitutes a rotating pair with the rear two.

As shown in fig. 4, in a natural state, the first insertion rod 104 and the second insertion rod 109 are respectively inserted into the pair of front positioning holes 101.2 on both sides of the first frame 101 under the elastic force of the first spring 105 and the second spring 108, when the tilt angle of the front turning plate 103 needs to be adjusted, the first knob 111 is twisted clockwise, the first insertion rod 104 moves rightwards and the second insertion rod 109 moves leftwards under the pulling force of the first connecting rod 106 and the second connecting rod 107, after the first insertion rod 104 and the second insertion rod 109 are both separated from the front positioning holes 101.2, the front turning plate 103 can be adjusted to a proper tilt position, and the twist of the first knob 111 is released, so that the first insertion rod 104 and the second insertion rod 109 are inserted into the front positioning holes 101.2 at new positions, and the tilt angle adjustment of the front turning plate 103 can be completed; when the first insertion rod 104 and the second insertion rod 109 are inserted into the pair of front positioning holes 101.2 at the lowermost end, the front flap 103 and the seat plate 101.1 can form a plane.

As shown in fig. 3, 4 and 5, the lower end of the rear turning plate 102 and the upper end of the front turning plate 103 form a revolute pair, two pressing plate hooks 121 are mounted at the upper end of the front turning plate 103 and form a revolute pair, a spring leaf 120 is mounted between the lower end of the pressing plate hook 121 and the front turning plate 103, two pressing plates 102.2 are mounted at the lower end of the rear turning plate 102 through screw fastening, the rear turning plate 102 rotates counterclockwise relative to the front turning plate 103 until the two pressing plates form a plane, the two pressing plates 102.2 can be clamped into the two pressing plate hooks 121, and under the action of the elastic force of the spring leaf 120, the pressing plate hooks 121 press the pressing plates 102.2, so that the; the lower ends of the two pressure plate hooks 121 are pressed to rotate anticlockwise, and the rotation of the rear turning plate 102 relative to the front turning plate 103 can be recovered after the pressure plate 102.2 is separated from the pressure plate hooks 121.

A rear plate upright post 102.1, a rear plate right socket 102.3 and a rear plate left socket 102.4 are arranged at the rear side of the rear turning plate 102, two poking columns are arranged at the upper side and the lower side of the front end of the second knob 112 and form a revolute pair with the rear plate upright post 102.1, a third inserted bar 114 is arranged in the rear plate right socket 102.3 and forms a revolute pair, a third spring 115 is arranged between the third inserted bar 114 and the rear plate right socket 102.3, the third inserted bar 114 is always positioned at the right end of the rear plate right socket 102.3 under the elastic force of the third spring 115, and a third connecting rod 116 is arranged between the left end of the third inserted bar 114 and the poking column at the lower side of the front end of the second knob 112 and forms a revolute pair with the rear two; the fourth inserted bar 119 is installed in the rear plate left socket 102.4 and constitutes a sliding pair, the fourth spring 118 is installed between the fourth inserted bar 119 and the rear plate left socket 102.4, the fourth inserted bar 119 is always located at the left end position of the rear plate left socket 102.4 under the elastic force action of the fourth spring 118, and the fourth connecting rod 117 is installed between the right end of the fourth inserted bar 119 and the upper side shifting column at the front end of the second knob 112 and constitutes a rotating pair with the rear two.

After the front turning plate 103 and the seat plate 101.1 form a plane, in a natural state, the third insertion rod 114 and the fourth insertion rod 119 are respectively inserted into the pair of rear positioning holes 101.3 under the elastic force action of the third spring 115 and the fourth spring 118, when the inclination angle of the rear turning plate 102 needs to be adjusted, the second knob 112 is twisted clockwise, the third insertion rod 114 moves leftwards and the fourth insertion rod 119 moves rightwards under the pulling force action of the third connecting rod 116 and the fourth connecting rod 117, after the third insertion rod 114 and the fourth insertion rod 119 are separated from the rear positioning holes 101.3, the rear turning plate 102 can be adjusted to a proper inclination position, the twisting of the second knob 112 is released, the third insertion rod 114 and the fourth insertion rod 119 are inserted into the rear positioning holes 101.3 at new positions, and the inclination angle adjustment action of the rear turning plate 102 can be completed; when the third insertion rod 114 and the fourth insertion rod 119 are inserted into the pair of rear positioning holes 101.3 at the lowermost end, the rear turning plate 102, the front turning plate 103 and the seat plate 101.1 form a plane for the infant to have a rest.

As shown in fig. 3 and 5, the rear side of the first frame 101 is provided with a connecting seat 101.5 and a top rod seat 101.4, the upper end of the left side of the first slot frame 124 and the connecting seat 101.5 form a revolute pair, the upper end of the right side of the first slot frame 124 is provided with a rectangular groove, the upper end of the rectangular groove is provided with two rectangular jacks, the lower end of the first slot frame 124 is internally provided with a hook cavity and a transverse button hole, the first hook 123 is installed in the hook cavity and can slide up and down in the hook cavity, the upper end of the first hook 123 is provided with an inclined plane structure, the middle position is provided with a rectangular opening, the lower side of the first button 122 is provided with an inclined plane, the first button 122 passes through the rectangular opening in the middle of the first hook 123 and is installed in the button hole of the first slot frame 124, the lower end of the first slot frame 124 is provided with two threaded holes communicated with the hook cavity, the two first fastening screws 129 are respectively installed in the two threaded holes, the two first hook springs, the left end of the first mandril 127 and the mandril base 101.4 form a rotation pair, and the thread structure at the right end, the two first wedge-shaped blocks 125 and the two first nuts 126 clamp the lower end of the first slot frame 124 together.

In an initial state, under the action of the elastic force of the first hook spring 128, the first hook 123 is positioned at the upper end of the hook cavity, the inclined plane structure at the upper end of the first hook 123 extends into the rectangular groove at the upper end of the right side of the first slot frame 124, the lower inclined plane of the first button 122 is pressed leftwards to push the first hook 123 to move downwards, and the inclined plane structure at the upper end of the first hook 123 retracts into the hook cavity; after releasing the pressing of the first button 122, the first hook 123 is restored to the original position by the elastic force of the first hook spring 128.

The first set screw 129 is in threaded pair connection with the first slot frame 124, and the compression amount of the first hook spring 128 can be changed by adjusting the position of the first set screw 129, so that the pressing and rebounding force of the first button 122 can be adjusted.

The adjustment of the pitch angle of the first seat 1.1 can be realized by adjusting the positions of the two first nuts 126 on the first top bar 127: the two first nuts 126 move leftwards on the first top bar 127, so that the front end of the first seat 1.1 inclines downwards, and the two first nuts 126 move rightwards on the first top bar 127, so that the front end of the first seat 1.1 inclines upwards.

As shown in fig. 6, 7 and 8, the second seat 1.2 includes a second frame 1001, a backrest 1002, a flap 1003, a link plate 1004, a pressure spring screw 1005, a ball spring 1006, a ball spring 1007, a spring plate 1008, a hook 1009, a positioning frame 1010, a second slot frame 1011, a second button 1012, a second wedge 1013, a second nut 1014, a second ejector 1015, a second hook spring 1016, a second set screw 1017 and a second hook 1018, the second frame 1001 is a main body supporting structure of the second seat 1.2, the flap 1003 is rotatably connected with the second frame 1001 through the two link plates 1004, the backrest 1002 can slide up and down at the rear end of the second frame 1001, and the positioning mechanism formed by the pressure spring screw 1005, the ball spring 1006, the ball spring 1007, the spring 1008, the hook spring 1008 and the positioning frame 1010 realizes the position adjustment and the positioning of the backrest 1002, so that infants with different sizes and heights can be adjusted to a comfortable sitting posture, when the backrest 1002 is at the lowest end position, the turning plate 1003 is turned forwards to enable the bottom of the second seat 1.2 to form a flat plane for an infant to lie down and play, the turning plate 1003 is turned backwards to enable the second seat 1.2 to become a protective vehicle for the infant to learn to walk, the upper end of the second slot frame 1011 and the upper end of the rear side of the second frame 1001 form a revolute pair, the lower end of the second slot frame 1011 is adjusted to the pitching inclination angle of the second seat 1.2 through an adjusting mechanism formed by the second wedge-shaped block 1013, the second nut 1014 and the second ejector pin 1015, so that the second seat 1.2 can bring comfortable sitting experience for the infants with different preferences, and the modular quick-insertion structure formed by the second slot frame 1011, the second button 1012, the second hook spring 1016, the second set screw 1017 and the second hook 1018 can realize efficient and quick connection and separation of the second seat 1.2 and the frame mechanism 2.

The mesh enclosure with good ventilation effect is arranged on two sides of the second frame 1001, the front end of the second frame is provided with a transverse handrail and an upright baffle for protecting the safety of infants, the bottom side of the second frame 1001 is longitudinally provided with two rectangular square holes with round corners, two connecting plates 1004, a turning plate 1003 and the second frame 1001 form a revolute pair, so that the turning plate 1003 and the second frame 1001 form a rotary connection, two guide rods 1001.2 are arranged in the rear end of the second frame 1001, two guide holes formed in the rear side of the backrest 1002 are matched and installed with the two guide rods 1001.2, the backrest 1002 can slide up and down relative to the second frame 1001, and the shape and size of a seat plate 1002.1 arranged at the bottom end of the backrest 1002 are the same as those of the rectangular square holes in the rear end of the bottom side of the second frame 1001.

In the initial state, the flap 1003 is turned forward to cover the rectangular square hole at the front end of the second frame 1001, and the backrest 1002 is at the lowest position to make the seat plate 1002.1 cover the rectangular square hole at the rear end of the second frame 1001, so that the bottom of the second seat 1.2 forms a flat plane for the infant to lie down and play.

A top rod seat 1001.5 is arranged at the rear side of the second frame 1001, the upper end of the left side of a second slot frame 1011 forms a revolute pair with the upper end of the rear side of the second frame 1001, a rectangular groove is arranged at the upper end of the right side of the second slot frame 1011, two rectangular insertion holes are arranged at the upper end of the rectangular groove, a hook cavity and a transverse button hole are arranged inside the lower end of the second slot frame 1011, a second hook 1018 is arranged in the hook cavity and can slide up and down in the hook cavity, an inclined plane structure is arranged at the upper end of the second hook 1018, a rectangular opening is arranged at the middle position, an inclined plane is arranged at the lower side of a second button 1012, the second button 1012 passes through the rectangular opening in the middle of the second hook 1018 and is arranged in the button hole of the second slot frame 1011, two threaded holes communicated with the hook cavity are arranged at the lower end of the second slot frame 1011, two second set screws 1017 are respectively arranged in the two threaded holes, two, the left end of the second top rod 1015 and the top rod seat 1001.5 form a rotation pair, and the thread structure at the right end, the two second wedge blocks 1013 and the two second nuts 1014 clamp the lower end of the second slot frame 1011 together.

In an initial state, under the action of the elastic force of the second hook spring 1016, the second hook 1018 is positioned at the upper end of the hook cavity, the inclined plane structure at the upper end of the second hook 1018 extends into the rectangular groove at the upper end of the right side of the second slot bracket 1011, and the inclined plane structure at the lower side of the second button 1012 is pressed leftwards to push the second hook 1018 to move downwards, so that the inclined plane structure at the upper end of the second hook 1018 retracts into the hook cavity; after releasing the pressing of the second button 1012, the second hook 1018 is restored to the original position by the elastic force of the second hook spring 1016.

The second set screw 1017 and the second slot frame 1011 form a screw pair connection, and the compression amount of the second hook spring 1016 can be changed by adjusting the position of the second set screw 1017, so that the pressing and rebounding force of the second button 1012 can be adjusted.

Adjusting the position of the two second nuts 1014 on the second rod 1015 can realize the adjustment of the pitch angle of the second seat 1.2: two second nuts 1014 move to the left on the second top bar 1015 so that the front end of the second seat 1.2 is inclined downwards, and two second nuts 1014 move to the right on the second top bar 1015 so that the front end of the second seat 1.2 is inclined upwards.

As shown in fig. 8, 9 and 10, a cavity structure is disposed at the rear end of the second frame 1001, a rotatable lower stop wheel 1001.1 is disposed at the lower end of the front side of the cavity structure, a ratchet bar 1001.3 is longitudinally disposed at the rear side of the cavity structure, a rotatable upper stop wheel 1001.4 is disposed at the upper end of the ratchet bar 1001.3, the positioning frame 1010 is tightly connected to the backrest 1002 through screws, a front top surface 1009.1 is disposed at the front side of the top hook 1009, a rear top surface 1009.2 is disposed at the lower end of the rear side, the top hook 1009 is mounted inside the positioning frame 1010 and constitutes a rotation pair, two spring strips 1008 are mounted between the positioning frame 1010 and the top hook 1009, the top hook 1009 tends to rotate counterclockwise under the elastic force of the spring strips 1008, a threaded hole is disposed at the top end of the positioning frame 1010, a top bead 1007 is mounted at the lower end of the threaded hole and extends downward, a pressure spring screw 1005 is mounted at the upper, the compression amount of the top ball spring 1006 can be changed by adjusting the position of the pressure spring screw 1005 in the threaded hole, so that the resilience of the top ball 1007 is adjusted, and the lower end of the top hook 1009 can be meshed with the teeth of the ratchet rack 1001.3, thereby positioning the height position of the backrest 1002.

In an initial state, under the action of the elastic force of the spring piece 1008, the top end of the top hook 1009 is positioned on the left side of the top bead 1007; when the height of the seat plate 1002.1 needs to be adjusted, the backrest 1002 is pulled upwards, the lower end of the top hook 1009 can jump from bottom to top between the teeth of the ratchet bar 1001.3, the upper end of the top hook 1009 is always located in the left area of the top bead 1007 in the process, the backrest 1002 stops being pulled upwards after the seat plate 1002.1 moves to a proper height position, the lower end of the top hook 1009 can be clamped between the teeth of the corresponding ratchet bar 1001.3 and cannot move downwards, and therefore the height adjustment and the positioning of the seat plate 1002.1 are completed.

When the height of the seat plate 1002.1 needs to be lowered, the backrest 1002 is pulled upwards to the highest position, in the process, the front top surface 1009.1 of the top hook 1009 moves upwards and contacts the upper stop wheel 1001.4, under the pushing of the upper stop wheel 1001.4, the top hook 1009 rotates clockwise, so that the upper end of the top hook compresses and crosses the top bead 1007 and reaches the right section of the top bead 1007, under the blocking action of the top bead 1007, the upper end of the top hook 1009 cannot pass through the top bead 1007 to the left section spontaneously, at the moment, the lower end of the top hook 1009 is disengaged from the ratchet rack 1001.3, so that the seat plate 1002.1 can slide downwards smoothly, when the seat plate 1002.1 slides to the lowest position, the lower stop wheel 1001.1 abuts against the rear top surface 1009.2 of the top hook 1009, under the pushing action of the lower stop wheel 1001.1, the top hook rotates anticlockwise, the upper end of the top hook compresses and crosses the top bead 1007 to the left section, so that the initial state is recovered, and the seat plate 1002.1 can be adjusted to the proper height continuously.

As shown in fig. 11, the frame mechanism 2 includes a first swing link 201, a top cover 202, a first upright 203, a first sliding sleeve 204, a first spring 205, a second upright 206, a pneumatic rod switch 207, a lower connecting rod 208, an upper connecting rod 209, a pneumatic rod 210, a fixed upright 211, a second spring 212, a second sliding sleeve 213, a third upright 214, a locking wrench 215, a cradle inserting rod 216, an inserting rod spring 217, a top swing sleeve 218, a tail swing sleeve 219, a second swing link 220, and a cross connecting rod 221, the frame mechanism 2 can realize modular connection with the first seat 1.1 through the first swing link 201, realize modular connection with the second seat 1.2 through the second swing link 220, and realize a synchronous transverse cradle function based on a pendulum effect between the first seat 1.1 and the second seat 1.2 through the cross connecting rod 221, the first upright 203 is of a T-shaped structure, the locking device 215 located at the left side of the upper end of the first upright 203 can realize locking function of the cradle wrenches for the first seat 1.1.1 and the second seat 1.2 through the cradle inserting rod 216, the first upright 203 can rotate relative to the second upright 206 and is locked by the first sliding sleeve 204, the lower connecting rod 208 and the upper connecting rod 209 are arranged between the second upright 206 and the third upright 214 to form a parallelogram structure, the pneumatic rod 210 is arranged between the lower connecting rod 208 and the upper connecting rod 209 through the top swinging sleeve 218 and the tail swinging sleeve 219 and is used for adjusting the height of the second upright 206, the lower end of the fixed upright 211 is fixedly connected with the chassis mechanism 3, and the third upright 214 can rotate relative to the fixed upright 211 and is locked by the second sliding sleeve 213.

The first swing link 201 and the second swing link 220 have the same structure, the left end of the first swing link is of a rectangular plate structure, the upper end of the rectangular plate structure is provided with two insert plates 201.1, the right end of the first swing link 201 is of a round shaft structure, the upper side of the round shaft structure is vertically provided with a round hole, the round shaft structure and the upper side left end of the first upright 203 form a rotating pair through a bearing, the round shaft structure at the right end of the second swing link 220 and the upper side right end of the first upright 203 form a rotating pair through a bearing, the left end of the transverse connecting rod 221 and the first swing link 201 form a rotating pair, the right end and the second swing link 220 form a rotating pair, the first swing link 201, the second swing link 220, the first upright 203 and the transverse connecting rod 221 form a parallelogram structure, the upper side left end of the first upright 203 is vertically provided with a step round hole, the cradle insert rod 216 is coaxially arranged in the step round hole and forms a moving pair, the insert rod spring 217 is arranged between the, the top cover 202 is mounted to the upper left end of the first upright 203.

As shown in fig. 9 and 10, the rectangular plate structure at the left end of the first swing link 201 can be embedded into the rectangular groove of the first slot frame 124, the two insertion plates 201.1 at the upper end of the rectangular plate structure are inserted into the two rectangular insertion holes at the upper end of the rectangular groove of the first slot frame 124, and the first hook 123 can hook the lower edge of the rectangular plate structure, so as to realize the modular connection of the first seat 1.1 and the frame mechanism 2; the first hook 123 can be retracted by pressing the first button 112, so that the connection between the first seat 1.1 and the frame mechanism 2 can be released; the modular connection principle of the second seat 1.2 to the frame mechanism 2 via the second rocker 220 is the same as described above.

As shown in fig. 12 and 13, in the initial state, the locking wrench 215 is in the vertical state, the cradle insert rod 216 is inserted downward into the circular hole on the upper side of the circular shaft structure at the right end of the first swing link 201 by the elastic force of the insert rod spring 217, so as to lock the cradle function of the first seat 1.1 and the second seat 1.2, and after the locking wrench 215 is pulled backward to the horizontal state, the cradle insert rod 216 moves upward and is separated from and held in the circular hole on the upper side of the circular shaft structure at the right end of the first swing link 201, so that the cradle function of the first seat 1.1 and the second seat 1.2 can be restored.

As shown in fig. 14 and 15, the lower end of the first upright 203 is provided with an external spline, the upper end of the second upright 206 forms a revolute pair with the lower end of the first upright 203 through two deep groove ball bearings and a thrust ball bearing, the position of the second upright 206 near the upper end is provided with an external spline, the upper end and the lower end inside the first sliding sleeve 204 are both provided with internal splines, the internal splines at the lower end of the first sliding sleeve cooperate with the external splines on the second upright 206 to form a sliding pair, so that the first sliding sleeve 204 can slide on the second upright 206 but cannot rotate, the internal splines at the upper end inside the first sliding sleeve 204 can cooperate with the external splines at the lower end of the first upright 203, and a first spring 205 is arranged between the lower end of the first sliding sleeve.

In the initial state, under the action of the elastic force of the first spring 205, the internal spline at the upper end of the first sliding sleeve 204 is always matched with the external spline at the lower end of the first upright column 203, so that the rotation of the first upright column 203 relative to the second upright column 206 is locked; when the first upright 203 needs to be rotated, the first sliding sleeve 204 can be pressed downwards, so that the inner spline at the upper end of the first sliding sleeve is separated from the matching with the outer spline at the lower end of the first upright 203, the first upright 203 can be rotated to a proper angle, then the pressing of the first sliding sleeve 204 is released, so that the inner spline at the upper end of the first sliding sleeve is matched with the outer spline at the lower end of the first upright 203, and the position of the first upright 203 is locked.

As shown in fig. 16 and 17, the lower end of the third upright 214 is provided with an external spline, the upper end of the fixed upright 211 forms a revolute pair with the lower end of the third upright 214 through two deep groove ball bearings and a thrust ball bearing, the position of the fixed upright 211 near the upper end is provided with an external spline, the upper end and the lower end inside the second sliding sleeve 213 are both provided with internal splines, the internal spline at the lower end of the second sliding sleeve 213 is matched with the external spline on the fixed upright 211 to form a sliding pair, so that the second sliding sleeve 213 can slide on the fixed upright 211 but cannot rotate, the internal spline at the upper end inside the second sliding sleeve 213 can be matched with the external spline at the lower end of the third upright 214, and a second spring 212 is arranged between.

In the initial state, the internal spline at the upper end of the second sliding sleeve 213 is always matched with the external spline at the lower end of the third upright post 214 under the action of the elastic force of the second spring 212, so that the rotation of the third upright post 214 relative to the fixed upright post 211 is locked; when the third upright 214 needs to be rotated, the second sliding sleeve 213 can be pressed downwards, so that the internal spline at the upper end of the second sliding sleeve is separated from the matching with the external spline at the lower end of the third upright 214, the third upright 214 can be rotated to a proper angle, then the pressing on the second sliding sleeve 213 is released, so that the internal spline at the upper end of the second sliding sleeve is matched with the external spline at the lower end of the third upright 214, and the position of the third upright 214 is locked.

After the second sliding sleeve 213 is pressed downwards and the third upright post 214 is rotated 180 degrees, the pressing of the second sliding sleeve 213 is released, so that the position of the third upright post 214 is locked, the first seat 1.1 and the second seat 1.2 can be changed from the front direction to the back direction, and the infant can be changed from the state of facing away from the parents to the state of facing the parents.

As shown in fig. 1, 5 and 11, the left ends of the upper link 209 and the lower link 208 and the third upright 214 form a rotation pair, the right ends of the upper link 209 and the second upright 206 form a rotation pair, the upper link 209 is installed on the upper side of the lower link 208, the upper link 209, the lower link 208, the second upright 206 and the third upright 214 form a parallelogram structure, the upper end of the pneumatic rod 210 and the upper link 209 form a rotation pair through the top pendulum sleeve 218, the lower end of the pneumatic rod 210 and the lower link 208 form a rotation pair through the tail pendulum sleeve 219, and the pneumatic rod switch 207 is installed at the top end of the pneumatic rod 210 and forms a rotation pair with the upper link 209.

When the first seat 1.1 and the second seat 1.2 are in an unloaded state, the air pressure bar switch 207 is turned downwards to extend the air pressure bar 210, so that the position of the second upright post 206 is raised, and the first seat 1.1 and the second seat 1.2 are raised; in the state of pulling the air pressure bar switch 207 downwards, the first upright column 203 is pressed downwards, the air pressure bar 210 can be contracted, so that the first seat 1.1 and the second seat 1.2 are lowered, the length of the air pressure bar 210 can be locked by releasing the air pressure bar switch 207, and the height positions of the first seat 1.1 and the second seat 1.2 can be locked.

The references to "front", "back", "left", "right", etc., are to be construed as being based on the orientation or positional relationship shown in the drawings or as would normally be placed upon use of the inventive article, and are intended to be descriptive only and not as indicating or implying that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.