阅读说明：本技术 儿童推车 (Children's barrow ) 是由 高翔 张兴荣 于 2021-04-19 设计创作，主要内容包括：本发明公开了一种儿童推车,包括具有展开状态与折叠状态的车架,车架包括两组侧支架、连接在两组侧支架之间的横撑组件,侧支架至少包括相互转动连接的第一支架杆与第二支架杆,横撑组件包括设置在两侧第一支架杆之间的横撑杆,横撑杆包括各自沿左右方向延伸的第一杆与第二杆,第一杆设于一侧的第一支架杆上,第二杆设于另一侧的第一支架杆上,且第一杆与第二杆沿左右方向滑动地连接,车架上还设有用于在第二支架杆相对第一支架杆转动时驱使第一杆相对第二杆滑动伸缩的联动装置。本发明的儿童推车,侧支架与横撑组件能够联动收折与展开,操作简便,车架折叠后体积小,便于收纳和携带。(The invention discloses a children cart, which comprises a frame in an unfolded state and a folded state, wherein the frame comprises two groups of side supports and a cross support assembly connected between the two groups of side supports, each side support at least comprises a first support rod and a second support rod which are mutually rotatably connected, the cross support assembly comprises a cross support rod arranged between the first support rods on two sides, each cross support rod comprises a first rod and a second rod which respectively extend along the left-right direction, the first rods are arranged on the first support rods on one side, the second rods are arranged on the first support rods on the other side, the first rods and the second rods are connected in a sliding mode along the left-right direction, and the frame is further provided with a linkage device for driving the first rods to slide and stretch relative to the second rods when the second support rods rotate relative to the first support rods. According to the stroller disclosed by the invention, the side brackets and the cross brace component can be folded and unfolded in a linkage manner, the operation is simple and convenient, and the size of the folded stroller frame is small, so that the stroller frame is convenient to store and carry.)

1. The utility model provides a children's shallow, includes the frame that has expansion state and fold condition, locates the front wheel subassembly and the rear wheel subassembly of frame bottom, the frame is including dividing two sets of collateral branch framves, the connection of locating the left and right sides two sets of stull subassembly between the collateral branch frame, its characterized in that: the side bracket at least comprises a first bracket rod and a second bracket rod which are mutually and rotatably connected,

the transverse supporting component comprises transverse supporting rods arranged between the first supporting rod and the second supporting rod, the transverse supporting rods comprise a first rod and a second rod, the first rod and the second rod extend along the left-right direction respectively, the first rod is arranged on the first supporting rod on one side, the second rod is arranged on the first supporting rod on the other side, the first rod and the second rod are connected in a sliding mode along the left-right direction, and a linkage device used for driving the first rod to slide relative to the second rod when the second supporting rod rotates relative to the first supporting rod so that the transverse supporting rods stretch along the left-right direction is further arranged on the frame.

2. The stroller of claim 1, wherein: the first rod is arranged on the first support rod on one side in a relatively rotating mode around the axis of the first rod, the second rod is fixedly arranged on the first support rod on the other side, a matching structure is arranged between the first rod and the second rod, and the matching structure enables the first rod to stretch and retract relative to the second rod in a sliding mode in the rotating process of the first rod around the axis of the first rod.

3. The stroller of claim 2, wherein: the first rod can relatively slide and can relatively rotate around the axis of the first rod to penetrate through a rod cavity of the second rod, the matching structure comprises a spiral groove and a limiting part, the spiral groove is formed in the second rod, the limiting part is arranged on the first rod, the limiting part is fixedly arranged at the end part of the first rod penetrating through the second rod, the spiral groove extends spirally along the length direction of the second rod, and the limiting part can be inserted into the spiral groove in a relatively sliding fit mode.

4. The stroller of claim 2, wherein: the linkage device comprises a transmission mechanism which can make the first rod rotate around the axis of the first rod in a linkage manner in the process that the second support rod rotates relative to the first support rod.

5. The stroller of claim 4, wherein: the transmission mechanism at least comprises a first gear and a second gear, the first gear is fixedly arranged on the second support rod, the second support rod and the first gear are jointly connected around a first rotation center line in a rotating way relative to the first support rod, the second gear is fixedly arranged on the first rod, the second gear and the first rod are arranged coaxially,

the first gear and the second gear are meshed with each other; or the like, or, alternatively,

the transmission mechanism further comprises a transmission assembly which is arranged between the first gear and the second gear in a transmission manner.

6. The stroller of claim 5, wherein: the transmission assembly comprises a transmission gear set, the transmission gear set comprises a third gear and a fourth gear which are fixedly arranged with the same axis, the third gear and the fourth gear are connected to the first support rod in a relative rotation mode around a second rotation center line, the first gear is meshed with the third gear, and the fourth gear is meshed with the second gear.

7. The stroller of claim 6, wherein:

the first rod is rotatably connected to the first support rod around the first rotation center line;

preferably, the first rotation center line is located above the second rotation center line on the first support bar;

preferably, the diameter of the first gear is larger than that of the third gear, and the diameter of the fourth gear is larger than that of the second gear;

preferably, the second gear is integrally formed on the first rod;

preferably, the second gear has an outer diameter greater than an inner diameter of the rod cavity of the second rod.

8. The stroller of claim 1, wherein: the transverse support component further comprises a plurality of auxiliary support rods which are arranged between the side supports on the two sides and can slide and stretch along the left-right direction, and when the first rod and the second rod slide relatively along the left-right direction, all the auxiliary support rods slide and stretch along the left-right direction.

9. Child stroller according to any of claims 1 to 8, characterized in that: the side bracket further includes:

the front wheel bracket is arranged at the bottom of the front wheel bracket;

the rear wheel bracket is arranged at the bottom of the rear wheel bracket, and the upper part of the front wheel bracket is rotationally connected with the upper part of the rear wheel bracket;

a side rail, a lower portion of which is rotatably connected with an upper portion of the rear wheel bracket;

the upper parts of the side handrails are rotatably connected to the push rod frame;

the rear support frame is rotationally connected to the rear wheel bracket, and the upper part of the rear support frame is rotationally connected with the lower part of the push rod frame;

the front part of the bottom bracket is rotationally connected to the front wheel bracket, and the rear part of the bottom bracket is rotationally connected with the lower part of the rear bracket;

the rear wheel support forms the first support rod, the rear support forms the second support rod, and the transverse support rods are arranged at the upper parts of the rear wheel supports on the two sides.

10. Child stroller according to any of claims 1 to 8, characterized in that: the side bracket further includes:

the front wheel bracket is arranged at the bottom of the front wheel bracket;

the rear wheel bracket is arranged at the bottom of the rear wheel bracket, and the upper part of the front wheel bracket is rotationally connected with the upper part of the rear wheel bracket;

the lower part of the push rod frame is rotationally connected with the upper part of the rear wheel bracket;

the rear part of the armrest frame is rotationally connected to the push rod frame;

the front supporting frame is rotationally connected to the front wheel bracket, the upper part of the front supporting frame is rotationally connected to the armrest frame, and the lower part of the front supporting frame is rotationally connected with a sliding piece;

a link assembly including a front link and a rear link both extending in a front-rear direction, a front portion of the front link being rotatably connected to the front wheel bracket, a rear portion of the front link being rotatably connected to a front portion of the rear link, a rear portion of the rear link being rotatably connected to the rear wheel bracket, the slider being slidably disposed on the front link in a front-rear direction;

the front wheel bracket forms the first bracket rod, the push rod bracket forms the second bracket rod, and the transverse support rod is arranged at the upper parts of the front wheel brackets at two sides.

Technical Field

The invention relates to the field of children products, in particular to a stroller.

Background

Among the prior art, the structure diverse of folding children's shallow frame, its folding principle also diverse, many shallow can not realize folding in the left and right sides direction of frame, or folding needs go on in multistep, have folding bulky, folding operation complicacy, be not convenient for accomodate and carry the problem.

Disclosure of Invention

The invention aims to provide a stroller which is small in folding volume and simple and convenient to fold.

In order to achieve the purpose, the invention adopts the technical scheme that:

a stroller comprises a frame in an unfolded state and a folded state, and a front wheel assembly and a rear wheel assembly which are arranged at the bottom of the frame, wherein the frame comprises two groups of side supports which are respectively arranged at the left side and the right side, and a cross support assembly connected between the two groups of side supports, the side supports at least comprise a first support rod and a second support rod which are mutually rotatably connected, the cross support assembly comprises cross support rods arranged between the first support rods at the two sides, the cross support rods comprise a first rod and a second rod which respectively extend along the left-right direction, the first rod is arranged on the first support rod at one side, the second rod is arranged on the first support rod at the other side, the first rod and the second rod are connected in a left-right sliding manner, and a linkage device for driving the first rod to slide relative to the second rod when the second support rod rotates relative to the first support rod to enable the cross support rod to stretch along the left-right direction .

Preferably, the first rod is relatively rotatably arranged on the first support rod on one side around the axis of the first rod, the second rod is fixedly arranged on the first support rod on the other side, and a matching structure is arranged between the first rod and the second rod, so that the first rod slides and stretches relative to the second rod in the rotating process of the first rod around the axis of the first rod.

Furthermore, the first rod can relatively slide and relatively rotate around the axis of the first rod to penetrate through the rod cavity of the second rod, the matching structure comprises a spiral groove formed in the second rod and a limiting part arranged on the first rod, the limiting part is fixedly arranged at the end part of the first rod penetrating through the second rod, the spiral groove spirally extends along the length direction of the second rod, and the limiting part can be relatively slidably inserted into the spiral groove.

In some embodiments, the limiting member is a limiting pin detachably disposed on the first rod, and an axial extending direction of the limiting pin is perpendicular to an axial line of the first rod.

Furthermore, an outer sleeve is fixedly sleeved outside the second rod, a matching groove which is consistent with the extending track of the spiral groove is further arranged on the inner side peripheral wall of the outer sleeve, one end part of the limiting piece is slidably inserted into the spiral groove, and the other end part of the limiting piece is slidably inserted into the matching groove.

Preferably, the linkage device comprises a transmission mechanism which can link the first rod to rotate around the axis of the first rod in the process of rotating the second support rod relative to the first support rod.

Further, the transmission mechanism includes: the first gear is fixedly arranged on the second support rod, and the second support rod and the first gear are connected together around a first rotation center line in a rotating mode relative to the first support rod; the second gear is fixedly arranged on the first rod and is arranged coaxially with the first rod.

In some embodiments, the first gear intermeshes with the second gear, and the first rotational centerline and the axis of the first shaft are parallel to each other.

In some embodiments, the transmission mechanism further comprises a transmission assembly drivingly disposed between the first and second gears.

Furthermore, the transmission assembly comprises a transmission gear set, the transmission gear set comprises a third gear and a fourth gear which are coaxially and fixedly arranged, the third gear and the fourth gear are connected to the first support rod in a relative rotation mode around a second rotation center line, the first gear is meshed with the third gear, and the fourth gear is meshed with the second gear.

Preferably, the first lever is rotatably connected to the first support lever about the first rotation center line.

Preferably, the first rotation center line is located above the second rotation center line on the first bracket bar.

Preferably, the diameter of the first gear is larger than the diameter of the third gear, and the diameter of the fourth gear is larger than the diameter of the second gear.

Preferably, the second gear is integrally formed on the first rod.

Preferably, the second gear has an outer diameter greater than an inner diameter of the rod cavity of the second rod.

Preferably, the side brackets at least include a rear wheel bracket provided with the rear wheel assembly at the bottom, the first bracket rod is the rear wheel bracket, and the transverse support rod is arranged at the upper parts of the rear wheel brackets at both sides.

Preferably, the cross brace assembly further includes a plurality of auxiliary brace rods which are arranged between the side brackets at two sides and can slide and extend along the left-right direction, and when the first rod and the second rod slide relatively along the left-right direction, all the auxiliary brace rods slide and extend along the left-right direction.

In some embodiments, the side bracket further comprises: the front wheel bracket is arranged at the bottom of the front wheel bracket; the rear wheel bracket is arranged at the bottom of the rear wheel bracket, and the upper part of the front wheel bracket is rotationally connected with the upper part of the rear wheel bracket; a side rail, a lower portion of which is rotatably connected with an upper portion of the rear wheel bracket; the upper parts of the side handrails are rotatably connected to the push rod frame; the rear support frame is rotationally connected to the rear wheel bracket, and the upper part of the rear support frame is rotationally connected with the lower part of the push rod frame; the front part of the bottom bracket is rotationally connected to the front wheel bracket, and the rear part of the bottom bracket is rotationally connected with the lower part of the rear bracket; the rear wheel support forms the first support rod, the rear support forms the second support rod, and the transverse support rods are arranged at the upper parts of the rear wheel supports on the two sides.

In some embodiments, the side bracket further comprises: the front wheel bracket is arranged at the bottom of the front wheel bracket; the rear wheel bracket is arranged at the bottom of the rear wheel bracket, and the upper part of the front wheel bracket is rotationally connected with the upper part of the rear wheel bracket; the lower part of the push rod frame is rotationally connected with the upper part of the rear wheel bracket; the rear part of the armrest frame is rotationally connected to the push rod frame; the front supporting frame is rotationally connected to the front wheel bracket, the upper part of the front supporting frame is rotationally connected to the armrest frame, and the lower part of the front supporting frame is rotationally connected with a sliding piece; a link assembly including a front link and a rear link both extending in a front-rear direction, a front portion of the front link being rotatably connected to the front wheel bracket, a rear portion of the front link being rotatably connected to a front portion of the rear link, a rear portion of the rear link being rotatably connected to the rear wheel bracket, the slider being slidably disposed on the front link in a front-rear direction; the front wheel bracket forms the first bracket rod, the push rod bracket forms the second bracket rod, and the transverse support rod is arranged at the upper parts of the front wheel brackets at two sides.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: according to the child stroller disclosed by the invention, when the second support rod rotates relative to the first support rod, the linkage device can enable the first rod to slide and stretch along the left and right directions relative to the second rod, so that the side support and the cross support component are linked, folded and unfolded, the operation is simple and convenient, the size of the folded stroller frame is small, and the stroller frame is convenient to store and carry.

Drawings

FIG. 1 is a perspective view of a stroller in an expanded state according to an embodiment of the present invention;

FIG. 2 is a schematic perspective view of the stroller of the first embodiment at another angle in an unfolded state;

FIG. 3 is a schematic side view of the stroller in a deployed position according to the first embodiment;

FIG. 4 is an exploded view of the stroller in accordance with the first embodiment;

FIG. 5 is an exploded perspective view of the stroller of the first embodiment at another angle;

FIG. 6 is a partially exploded view of the stroller in accordance with the first embodiment;

FIG. 7 is a further exploded view of FIG. 6;

FIG. 8 is a perspective view of the stroller in the first embodiment during folding;

FIG. 9 is a schematic perspective view of the stroller shown in the first embodiment at another angle during folding;

FIG. 10 is a schematic side view of the stroller in a folding process according to the first embodiment;

FIG. 11 is a perspective view of the stroller in the first embodiment in a folded state;

FIG. 12 is a rear view of the stroller in the first embodiment in a folded state;

FIG. 13 is a schematic side view of the stroller in a folded state according to the first embodiment;

fig. 14 is a perspective view of the stroller in the second embodiment in the unfolded state;

fig. 15 is a perspective view of the stroller of the second embodiment at another angle in the unfolded state;

FIG. 16 is a schematic side view of the stroller in accordance with the second embodiment in a deployed state;

fig. 17 is an exploded view of the stroller in accordance with the second embodiment;

fig. 18 is a partial perspective view of the stroller in the second embodiment;

FIG. 19 is an exploded view of FIG. 18;

FIG. 20 is a further exploded view of FIG. 19;

fig. 21 is a perspective view of the stroller in the folding process according to the second embodiment;

FIG. 22 is a perspective view of the stroller of the second embodiment at another angle during folding;

FIG. 23 is a schematic side view of the stroller of the second embodiment during folding;

FIG. 24 is a perspective view of the stroller of the second embodiment in a folded state;

FIG. 25 is a rear view of the stroller in the folded state according to the second embodiment;

FIG. 26 is a side view of the stroller of the second embodiment in a folded state;

wherein: 100. a side bracket; 101. a front wheel bracket; 102. a rear wheel support; 103. a side arm rest; 104. a push rod frame; 1041. a push rod is arranged; 1042. a lower push rod; 105. a rear support frame; 106. a bottom bracket; 107. a handrail frame; 108. a front bracket; 1081. a slider; 109. a front link; 110. a rear connecting rod; 111. a seat post; 112. a seat link;

200. a cross brace assembly; 201. a transverse stay bar; 202. attaching a support rod;

300. a front wheel assembly; 400. a rear wheel assembly; 500. a handle bar; 501. an unlock button;

1. a first lever; 11. a limiting member; 2. a second lever; 21. a helical groove; 3. a first gear; 4. a second gear; 5. a third gear; 6. a fourth gear; 7. an outer sleeve; 8. a loop bar; 9. a slide bar;

1000. a first rotational centerline; 2000. a second centerline of rotation.

Detailed Description

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the invention may be more readily understood by those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "left-right", "height", "front-back" and the like indicate orientations or positional relationships that, when an adult of a stroller holds the putter frame 104, based on fig. 1, are shown only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, only have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. Further, the description of the upper, lower, left, right, etc. used in the present invention is only with respect to the positional relationship of the respective components of the present invention with respect to each other in the drawings.

Example one

Referring to fig. 1 to 3, a stroller includes a frame having an unfolded state and a folded state, a front wheel assembly 300 and a rear wheel assembly 400 disposed at the bottom of the frame, the frame includes two sets of side brackets 100 disposed at the left and right sides, and a cross brace assembly 200 connected between the two sets of side brackets 100, the side brackets 100 at least include a first bracket rod and a second bracket rod which are rotatably connected to each other, and when the first bracket rod and the second bracket rod are rotated relatively to be folded, all the cross brace assemblies 200 can be linked to be folded along the left and right directions. The stroller is further provided with a locking device for locking the frame in the unfolded state.

In this embodiment, the side frame 100 specifically includes a front wheel frame 101, a rear wheel frame 102, a side armrest 103, a push rod frame 104, a rear support frame 105, a bottom support frame 106, a seat rod 111, a seat link 112, and the like. When the frame is in the unfolded state, the front wheel assembly 300 is arranged at the bottom of the front wheel bracket 101, the rear wheel assembly 400 is arranged at the bottom of the rear wheel bracket 102, and the upper part of the front wheel bracket 101 is rotatably connected with the upper part of the rear wheel bracket 102 through the rotating shaft c. The lower portion of the side arm rest 103 is rotatably connected to the upper portion of the rear wheel bracket 102 via a rotating shaft b, and the upper portion of the side arm rest 103 is rotatably connected to the push rod frame 104 via a rotating shaft a. The rear bracket 105 is rotatably connected to the rear wheel bracket 102 via a rotating shaft s, and an upper portion of the rear bracket 105 is rotatably connected to a lower portion of the push rod frame 104 via a rotating shaft r. The front part of the bottom bracket 106 is rotatably connected to the front wheel bracket 101 through a rotating shaft g, and the rear part of the bottom bracket 106 is rotatably connected to the lower part of the rear bracket 105 through a rotating shaft d. The seat rod 111 is used for providing sitting support for children, and the rear part of the seat rod is rotationally connected with the rear support frame 105 through a rotating shaft e; the upper portion of the seat link 112 is rotatably connected to the seat rod 111 through a rotation shaft f, and the lower portion of the seat link 112 is rotatably connected to the upper portion of the rear bracket 102 through a rotation shaft c. The push rod frame 104 is inclined and extended from bottom to top, and the rotating shaft r is located below the rotating shaft a. In the length extending direction of the rear bracket 105, the rotating shaft s is positioned between the rotating shaft a and the rotating shaft d; the rotation axis b is located above the rotation axis c on the rear wheel bracket 102. The axes of the rotating shaft a, the rotating shaft b, the rotating shaft c, the rotating shaft d, the rotating shaft e, the rotating shaft f, the rotating shaft g, the rotating shaft r and the rotating shaft s extend along the left and right direction of the frame.

Referring to fig. 4, the frame of the present embodiment further includes a handle rod 500 connected between the two push rod frames 104, two ends of the handle rod 500 are respectively rotatably connected to the upper ends of the push rod frames 104 on the same side through a rotating shaft h, and an axis of the rotating shaft h extends along the length direction of the push rod frames 104.

The locking device in this embodiment is disposed at the rotational connection between the side armrest 103 and the push rod frame 104, and the specific structure of the locking device may be the existing locking device, which is not limited in the present invention. The middle of the handle bar 500 is also provided with an unlocking button 501 for unlocking the locking device.

In this embodiment, the rear wheel bracket 102 constitutes a first bracket bar, and the rear bracket 105 constitutes a second bracket bar.

The cross brace assembly 200 includes a cross brace 201 disposed between the first side support rods on both sides, and a plurality of auxiliary braces 202 disposed between the side supports 100 and capable of sliding and stretching in the left-right direction, in this embodiment, at least three auxiliary braces 202 are respectively disposed between the seat rods 111 on both sides, between the front wheel supports 101, and between the rear wheel supports 102. When the side brackets 100 rotate and drive the transverse supporting rods 201 to extend and retract along the left and right directions, all the auxiliary supporting rods 202 can extend and retract synchronously, so that the left and right side brackets 100 are close to each other, and the folding of the whole frame in the left and right directions is realized.

Referring to fig. 4 to 7, in the present embodiment, a crossbar 201 is provided at the upper portion of the rear wheel carrier 102 on both sides. The transverse supporting rod 201 comprises a first rod 1 and a second rod 2 which extend along the left-right direction respectively, the first rod 1 is arranged on the rear wheel bracket 102 on one side, the second rod 2 is arranged on the rear wheel bracket 102 on the other side, the first rod 1 and the second rod 2 are connected in a left-right sliding mode, and a linkage device which is used for driving the first rod 1 to slide relative to the second rod 2 when the rear supporting frame 105 rotates relative to the rear wheel bracket 102 so that the transverse supporting rod 201 can stretch and retract along the left-right direction is further arranged on the bicycle frame.

Specifically, the first rod 1 is relatively rotatably arranged on the rear wheel bracket 102 on one side around the axis of the first rod 1, the second rod 2 is fixedly arranged on the rear wheel bracket 102 on the other side, and a matching structure is arranged between the first rod 1 and the second rod 2, so that the first rod 1 slides and stretches relative to the second rod 2 in the rotating process around the axis of the first rod 1. In this embodiment, the first rod 1 is disposed on the left side of the frame, and the second rod 2 is disposed on the right side of the frame.

First pole 1 can enough relative slip can wear to establish in the pole chamber of second pole 2 around self axial lead relative rotation ground again, and the cooperation structure is including setting up the helicla flute 21 on second pole 2 and setting up locating part 11 on first pole 1, and wherein, locating part 11 sets firmly on the tip that first pole 1 wore to establish in second pole 2, and the helicla flute 21 extends along the length direction spiral of second pole 2, and locating part 11 can insert relatively sliding fit ground and establish in helicla flute 21. Specifically, the limiting member 11 is a limiting pin detachably disposed on the first rod 1, and is in threaded connection with the first rod 1, and an axial extending direction of the limiting pin is perpendicular to an axial line of the first rod 1. In the process that the first rod 1 rotates around the axis line of the first rod, the limiting piece 11 slides along the spiral groove 21, so that the first rod 1 slides and stretches in the left-right direction relative to the second rod 2.

In addition, the outer sleeve 7 is fixedly sleeved outside the second rod 2, a fitting groove (not shown in the figure) which is consistent with the extending track of the spiral groove 21 is further formed in the inner peripheral wall of the outer sleeve 7, one end of the limiting member 11 is slidably inserted into the spiral groove 21, and the other end of the limiting member 11 is slidably inserted into the fitting groove, so that fitting guidance is realized, the telescopic sliding of the transverse supporting rod 201 is smoother, and the outer appearance is more beautiful.

Further, the linkage device includes a transmission mechanism capable of linking to rotate the first lever 1 about its axis during rotation of the rear bracket 105 relative to the rear wheel carrier 102.

The transmission mechanism at least comprises a first gear 3 and a second gear 4, wherein the first gear 3 is fixedly arranged on the push rod frame 104, and the push rod frame 104 and the first gear 3 are connected together around a first rotation center line 1000 in a rotating way relative to the front wheel bracket 101; the second gear 4 is fixedly arranged on the first rod 1, and the second gear 4 and the first rod 1 are arranged coaxially.

In some embodiments, the first gear 3 can be directly meshed with the second gear 4, and the first rotation center line 1000 is parallel to the axis of the first rod 1, so that when the push rod frame 104 and the first gear 3 rotate, the second gear 4 and the first rod 1 are driven to rotate.

In this embodiment, the transmission mechanism further includes a transmission assembly, and the transmission assembly is drivingly disposed between the first gear 3 and the second gear 4, so that the first gear 3 rotates for a time period grounded to drive the second gear 4 to rotate. Specifically, the transmission assembly includes a transmission gear set, the transmission gear set includes a third gear 5 and a fourth gear 6 which are coaxially and fixedly arranged with each other, the third gear 5 and the fourth gear 6 are relatively rotatably connected to the rear wheel bracket 102 around a second rotation center line 2000 together, wherein the first gear 3 and the third gear 5 are engaged with each other, and the fourth gear 6 and the second gear 4 are engaged with each other.

In this embodiment, the first rod 1 is rotatably connected to the rear wheel bracket 102 about a first rotation center line 1000, and the axis of the first rod 1 is collinear with the first rotation center line 1000, and the first rotation center line 1000 is also the common axis of the first gear 3 and the second gear 4, and the first rotation center line 1000 is located above the second rotation center line 2000 on the rear wheel bracket 102.

Further, the diameter of the first gear 3 is larger than that of the third gear 5, and the diameter of the fourth gear 6 is larger than that of the second gear 4. In the present embodiment, the second gear 4 is integrally formed on the first lever 1. The outer diameter of the second gear 4 is larger than the inner diameter of the rod cavity of the second rod 2, so that a limit can be formed, and the first rod 1 cannot be completely accommodated in the rod cavity of the second rod 2.

In this embodiment, all the auxiliary stay bars 202 include a slide bar 9 and a sleeve bar 8 which extend along the left-right direction, in each group of auxiliary stay bars 202, the slide bar 9 is disposed on the left side bracket 100, the sleeve bar 8 is disposed on the right side bracket 100, the sleeve bar 8 has a bar cavity extending along the length direction thereof, the outer diameter of the slide bar 9 is smaller than the inner diameter of the bar cavity of the sleeve bar 8, and thus the slide bar 9 can be slidably inserted into the bar cavity of the sleeve bar 8 along the left-right direction.

The folding principle of the stroller in this embodiment is specifically described as follows:

referring to fig. 8 to 10, when the frame needs to be folded, an unlocking button 501 on the handle bar 500 is firstly pressed, so that the bars can rotate relatively; the push rod frame 104 is then pressed downward to drive the side arm rests 103 and the rear stay 105 to rotate backward and to be folded with the rear wheel bracket 102.

In this process, the linkage can drive the first rod 1 to retract relative to the second rod 2 in a sliding manner: taking the view angle shown in fig. 9 as an example, when the linkage device on the left side of the stroller is viewed from the left side of the stroller, the rear stay 105 rotates backward and downward, so that the first gear 3 rotates clockwise around the first rotation center line 1000, the third gear 5 engaged with the first gear is driven to rotate counterclockwise, the fourth gear 6 also rotates counterclockwise, and further the second gear 4 engaged with the fourth gear is driven to rotate clockwise, that is, the first gear 3 drives the second gear 4 to rotate in the same direction as the first gear through the transmission assembly, the first rod 1 rotates clockwise, so that the limiting member 11 slides along the spiral groove 21, and the first rod 1 retracts in the left-right direction relative to the second rod 2.

When the first rod 1 retracts relative to the second rod 2, the left and right brackets 100 approach each other, so that all the auxiliary stay bars 202 can slide and retract in the left-right direction, and the push rod brackets 104 on both sides are retracted to the rear side of the grip lever 500 around the rotation axis h.

Meanwhile, when the rear stay 105 rotates, the bottom bracket 106 is driven to rotate, so that the front wheel bracket 101 and the rear wheel bracket 102 are drawn close to each other, and the frame is folded in the front-rear direction.

Referring to fig. 11 to 13, when the rear support frame 105 and the rear wheel bracket 102 are completely rotated and folded, all the cross brace assemblies 200 are also folded, all the slide bars 9 are inserted into the bar cavities of the loop bars 8, and the frame is folded in the height direction, the front-back direction and the width direction, so that the folding operation is simple, the folding volume is small, and the frame is convenient to store and carry.

When the frame in a folded state needs to be unfolded, the steps are reversely operated: the push rod frame 104 is pulled upwards, the rear support rod 105 rotates forwards and upwards, the linkage device is linked with the first rod 1 to slide and extend relative to the second rod 2, and therefore the whole left and right side supports 100 are far away from each other and are unfolded, and details are not repeated.

Example two

Referring to fig. 14 to 26, the stroller of this embodiment is substantially the same as the stroller of the first embodiment, and the main difference is the specific structure of the bars of the frame.

Referring to fig. 14 to 16, in the present embodiment, the side bracket 100 specifically includes a front wheel bracket 101, a rear wheel bracket 102, a push rod bracket 104, an armrest bracket 107, a front support frame 108, a connecting rod assembly, and the like. Wherein, the front wheel assembly 300 is arranged at the bottom of the front wheel bracket 101, the rear wheel assembly 400 is arranged at the bottom of the rear wheel bracket 102, and the upper part of the front wheel bracket 101 is rotatably connected with the upper part of the rear wheel bracket 102 through a rotating shaft i. The push rod frame 104 specifically includes an upper push rod 1041 and a lower push rod 1042 which are slidably connected, and a lower portion of the push rod frame 104 is rotatably connected to an upper portion of the rear wheel bracket 102 through a rotating shaft j. The rear portion of the handle frame 107 is rotatably coupled to the push rod frame 104 by a rotating shaft t. The front bracket 108 is rotatably connected to the front wheel bracket 101 through a rotation shaft p, the upper part of the front bracket 108 is rotatably connected to the armrest frame 107 through a rotation shaft k, and the lower part of the front bracket 108 is rotatably connected to the slider 1081 through a rotation shaft m. The link assembly specifically includes a front link 109 and a rear link 110 each extending in the front-rear direction, a front portion of the front link 109 is rotatably connected to the front wheel bracket 101 through a rotation shaft n, a rear portion of the front link 109 is rotatably connected to a front portion of the rear link 110 through a rotation shaft o, a rear portion of the rear link 110 is rotatably connected to the rear wheel bracket 102 through a rotation shaft u, and a slider 1081 is slidably provided on the front link 109 in the front-rear direction.

The axial lines of the rotating shaft i, the rotating shaft j, the rotating shaft k, the rotating shaft m, the rotating shaft n, the rotating shaft o, the rotating shaft p, the rotating shaft t and the rotating shaft u extend along the left-right direction of the frame. In the length direction of the front bracket 108, the rotating shaft p is located between the rotating shaft k and the rotating shaft m; the pivot j is located above the pivot i on the front wheel bracket 101.

Referring to fig. 17, the frame of the present embodiment also includes a handle rod 500 connected between the push rod frames 104 on both sides, both ends of the handle rod 500 are respectively rotatably connected to the upper end of the upper push rod 1041 on the same side through a rotating shaft q, and the axis of the rotating shaft q extends along the length direction of the push rod frame 104.

The locking device in this embodiment is disposed at the rotational connection between the down-push rod 1042 and the front wheel bracket 101, which may specifically adopt the prior art, and the middle of the grip lever 500 is provided with an unlocking button 501 for unlocking the locking device.

In this embodiment, the front wheel bracket 101 forms a first bracket rod, and the push rod bracket 104 forms a second bracket rod.

In this embodiment, at least two auxiliary stay bars 202 are respectively located between the front wheel brackets 101 and between the rear wheel brackets 102 on both sides. And the slide rod 9 is arranged on the side bracket 100 at the right side, and the loop bar 8 is arranged on the side bracket 100 at the left side.

The structure of the linkage device in this embodiment is basically the same as that in the first embodiment, and the difference is mainly that the axes of the first gear 3 and the second gear 4 are arranged in parallel, specifically, the axis of the first gear 3 is located above the axis of the second gear 4, but the above difference does not affect the working principle of the linkage device in this embodiment, and only when the axes are arranged in a collinear manner, the structure of the frame can be made more compact.

Referring to fig. 18 to 20, in the present embodiment, a crossbar 201 is provided at the upper portion of the front wheel carrier 101 on both sides. Specifically, the first rod 1 is relatively rotatably disposed on the left front wheel bracket 101 around its axis, the second rod 2 is fixedly disposed on the right front wheel bracket 101, and an outer sleeve (not shown) is fixedly sleeved outside the second rod 2.

The first gear 3 is fixedly arranged on the push rod frame 104, and the push rod frame 104 and the first gear 3 are connected together around a first rotation center line 1000 in a rotating way relative to the front wheel bracket 101; the second gear 4 is fixedly arranged on the first rod 1, and the second gear 4 and the first rod 1 are arranged coaxially. The third gear wheel 5 is connected to the front wheel carrier 101 together with the fourth gear wheel 6 for relative rotation about a second center of rotation 2000. The first rotation center line 1000 is located above the second rotation center line 2000 on the front wheel carrier 101.

The folding principle of the stroller in this embodiment is specifically described as follows:

referring to fig. 21 to 23, when the stroller of this embodiment is folded, the unlocking button 501 on the handle bar 500 is also pressed first, so that the bars can rotate relative to each other; then the upper push rod 1041 is pressed down to contract and fold with the lower push rod 1042, and simultaneously the push rod frame 104 is rotated forward integrally and folds with the front wheel bracket 101.

In this process, the linkage can drive the first rod 1 to retract relative to the second rod 2 in a sliding manner: taking the perspective shown in fig. 21 as an example, when the left side of the stroller is viewed from the left side, the push rod frame 104 rotates forward and downward, so that the first gear 3 rotates counterclockwise around the first rotation center line 1000, the second gear 4 rotates counterclockwise in the same direction as the first gear through the transmission assembly, the first rod 1 also rotates counterclockwise, so that the limiting member 11 slides along the spiral groove 21, and the first rod 1 retracts in the left-right direction relative to the second rod 2.

As can be seen from the figure, the rotation extending direction of the spiral groove 21 in the present embodiment is opposite to that in the first embodiment, which is designed according to the specific arrangement of the first and second support rods, so as to enable the relative retraction of the first and second rods 1 and 2 when the first and second support rods rotate close to each other.

When the first lever 1 retracts relative to the second lever 2, the left and right brackets 100 approach each other, so that all the auxiliary stays 202 can slide and retract in the left-right direction, and the push rod brackets 104 on both sides are retracted to the rear side of the grip lever 500 around the rotation axis q.

Meanwhile, the armrest frame 107 and the front support frame 108 are rotated and folded between the push rod frame 104 and the front wheel bracket 101, the sliding piece 1081 slides backwards along the front connecting rod 109, the push rod frame 104 continues to rotate forwards, so that the front wheel bracket 101 and the rear wheel bracket 102 are close to each other, and the frame is folded in the up-down and front-back directions.

When the frame in the folded state needs to be unfolded, the steps are operated in the reverse direction, and detailed description is omitted.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.