阅读说明：本技术 一种便于上楼梯的折叠式灾区医疗救援担架 (Foldable disaster area medical rescue stretcher convenient to go upstairs ) 是由 姜荣健 于 2021-08-30 设计创作，主要内容包括：本发明涉及担架技术领域,尤其涉及一种便于上楼梯的折叠式灾区医疗救援担架,包括有折叠机构、卡紧机构、储物机构、固定机构等；折叠机构上设有卡紧机构,折叠机构上设有储物机构,固定机构设于转动架上。通过第二滑动架与第三楔形块的配合,可以防止在运送患者的过程中误将转动架及其上装置折叠,进一步地保证了在运送患者过程中的稳定性,达到了在使用该设备运送患者的过程中能够有效地始终保持平衡的效果。(The invention relates to the technical field of stretchers, in particular to a folding type disaster area medical rescue stretcher convenient for going upstairs, which comprises a folding mechanism, a clamping mechanism, a storage mechanism, a fixing mechanism and the like; the folding mechanism is provided with a clamping mechanism, the folding mechanism is provided with a storage mechanism, and the fixing mechanism is arranged on the rotating frame. Through the cooperation of second carriage and third wedge-shaped piece, can prevent to fold rotating turret and last device at the in-process mistake that transports the patient, further guaranteed transporting patient in-process stability, reached and can keep balanced effect throughout effectively using this equipment to transport patient's in-process.)

1. The utility model provides a foldable disaster area medical rescue stretcher convenient to go upstairs which characterized in that: the folding mechanism comprises a folding mechanism (1), a clamping mechanism (2) and a storage mechanism (3), wherein the clamping mechanism (2) is arranged on the folding mechanism (1), and the storage mechanism (3) is arranged on the folding mechanism (1).

2. The folding type disaster area medical rescue stretcher convenient for going upstairs according to claim 1 is characterized in that: the folding mechanism (1) comprises a fixed table (11), a rotating shaft (12), a rotating frame (13) and a torsion spring (14), wherein the rotating shaft (12) is symmetrically and rotatably connected to the fixed table (11), the rotating frame (13) is connected to the rotating shaft (12), the rotating frame (13) is in contact with the fixed table (11), and the torsion spring (14) is symmetrically connected between the rotating frame (13) and the fixed table (11).

3. The foldable disaster area medical rescue stretcher convenient for going upstairs according to claim 2, which is characterized in that: the clamping mechanism (2) comprises a first fixing frame (21), a first sliding rod (22), a first wedge-shaped block (23), a first reset spring (24), a second fixing frame (25) and a first fixing block (26), wherein the first fixing frame (21) is connected to one side of a rotating frame (13), the first sliding rod (22) is connected to the first fixing frame (21) in a sliding mode, the first wedge-shaped block (23) is connected to one end of the first sliding rod (22), the first reset spring (24) is connected between the first wedge-shaped block (23) and the first fixing frame (21), the second fixing frame (25) is connected to one side of the other rotating frame (13), and the first fixing block (26) is connected to the second fixing frame (25).

4. The foldable disaster area medical rescue stretcher convenient for going upstairs according to claim 3, which is characterized in that: storing mechanism (3) is including fixed plate (31), second slide bar (32), first carriage (33), second reset spring (34) and slip box (35), fixed plate (31) have been connected to fixed station (11) bottom hookup, it has two second slide bars (32) to slide connection on fixed plate (31), two second slide bars (32) dislocation set, second slide bar (32) one end hookup has first carriage (33), two first carriages (33) correspond the setting, be connected with second reset spring (34) between first carriage (33) and fixed plate (31), it has slip box (35) to slide connection on first carriage (33).

5. The foldable disaster area medical rescue stretcher convenient for going upstairs according to claim 4, which is characterized in that: the fixing mechanism (4) is arranged on the rotating frame (13), the fixing mechanism (4) comprises a third fixing frame (41), a second wedge-shaped block (42), a third reset spring (43), a fourth fixing frame (44), a rotating wheel (45), a volute spring (46), a binding band (47) and a first fixing rod (48), the top of the rotating frame (13) is connected with the third fixing frame (41), the third fixing frame (41) is connected with the second wedge-shaped block (42) in a sliding mode, the third reset spring (43) is connected between the second wedge-shaped block (42) and the third fixing frame (41), the top of the rotating frame (13) is connected with a pair of fourth fixing frames (44), the rotating wheel (45) is connected between the fourth fixing frames (44) in a rotating mode, the volute spring (46) is connected on the rotating wheel (45), the binding band (47) is connected on the spring (46), one end of the binding band (47) is connected with a first fixing rod (48).

6. The foldable disaster area medical rescue stretcher convenient for going upstairs according to claim 5, is characterized in that: the clamping mechanism (5) is arranged on the fixed platform (11), the clamping mechanism (5) comprises a first bevel gear (51), a fifth fixed frame (52), a second fixed rod (53), a flat gear (54), a second bevel gear (55), a second sliding frame (56), a fourth reset spring (57), a rack (58), a sixth fixed frame (59) and a third wedge-shaped block (511), one end of a rotating wheel (45) is connected with the first bevel gear (51), a pair of fifth fixed frames (52) are connected on the fixed platform (11) in a linkage manner, the fifth fixed frames (52) are connected with the second fixed rod (53) in a rotation manner, the flat gear (54) is connected on the second fixed rod (53), one end of the second fixed rod (53) is connected with the gear (55), the second bevel gear (55) is meshed with the first bevel gear (51), the second sliding frame (56) is connected on the fifth fixed frame (52) in a sliding manner, a fourth return spring (57) is connected between the second sliding frame (56) and the fifth fixed frame (52), a rack (58) is connected to the second sliding frame (56), a sixth fixed frame (59) is connected to the second sliding frame (56), a third wedge block (511) is connected to one end of the rotating shaft (12), and the third wedge block (511) is in contact with the second sliding frame (56).

7. The foldable disaster area medical rescue stretcher convenient for going upstairs according to claim 6, is characterized in that: the sliding mechanism (6) is arranged on the rotating frame (13), the sliding mechanism (6) comprises a third sliding frame (61), a fifth reset spring (62), a third fixing rod (63), a rolling wheel (64), a second fixing block (65), a third fixing block (67), a wedge-shaped frame (68), a sliding block (69) and a sixth reset spring (611), the rotating frame (13) is connected with the third sliding frame (61) in a sliding manner, the fifth reset spring (62) is connected between the third sliding frame (61) and the rotating frame (13), the third fixing rod (63) is connected on the third sliding frame (61) in a connecting manner, the rolling wheel (64) is connected on the third sliding frame (61) in a symmetrical rotating manner, the second fixing block (65) is connected on the bottom of the rotating frame (13) in a symmetrical manner, the wedge-shaped frame (68) is connected on the second fixing blocks (65) on the same side in a sliding manner, the wedge-shaped frame (68) is in sliding fit with the third sliding frame (61), a third fixing block (67) is connected to the wedge-shaped frame (68) in a connecting mode, sliding blocks (69) are symmetrically and slidably connected to the wedge-shaped frame (68), the sliding blocks (69) are clamped into the third sliding frame (61), and a sixth reset spring (611) is connected between the second fixing block (65) and the wedge-shaped frame (68).

Technical Field

The invention relates to the technical field of stretchers, in particular to a folding type disaster area medical rescue stretcher convenient for going upstairs.

Background

The stretcher is a necessary article for rescue, can carry injured people, keeps the injured people in an extending state as much as possible, can avoid further injury of the injured people, and can assist medical care personnel to rapidly transfer patients to a hospital for treatment.

However, in some high-rise buildings without an elevator, once a patient is injured and needs to be transported by a medical stretcher, the medical stretcher in the prior art is prone to incline when the patient is transported in a staircase, the patient on the stretcher may slip off from the stretcher to cause secondary injury, and in a special case, medical staff may have a phenomenon that the medical staff cannot take the medical kit due to emergency, and the medical kit cannot arrive in time, which may bring great trouble to the medical staff.

Disclosure of Invention

In view of the above, there is a need for a foldable disaster area medical rescue stretcher capable of effectively keeping a balance all the time to prevent a patient from being injured secondarily and having a function of conveniently storing medical devices to be convenient for going upstairs in the process of transporting the patient using the device, so as to solve the above-mentioned problems in the background art that the stretcher is prone to be inclined during the process of transporting the patient and the function of conveniently storing the medical devices is not provided.

A foldable disaster area medical rescue stretcher convenient to go upstairs comprises a folding mechanism, a clamping mechanism and a storage mechanism, wherein the folding mechanism is provided with the clamping mechanism, and the folding mechanism is provided with the storage mechanism.

In a preferred embodiment of the invention, the folding mechanism comprises a fixed table, a rotating shaft, a rotating frame and a torsion spring, wherein the rotating shaft is symmetrically and rotatably connected to the fixed table, the rotating frame is connected to the rotating shaft, the rotating frame is in contact with the fixed table, and the torsion spring is symmetrically connected between the rotating frame and the fixed table.

In a preferred embodiment of the present invention, the clamping mechanism comprises a first fixing frame, a first sliding rod, a first wedge, a first return spring, a second fixing frame and a first fixing block, wherein the first fixing frame is connected to one side of the rotating frame, the first sliding rod is slidably connected to the first fixing frame, the first wedge is connected to one end of the first sliding rod, the first return spring is connected between the first wedge and the first fixing frame, the second fixing frame is connected to one side of the other rotating frame, and the first fixing block is connected to the second fixing frame.

In a preferred embodiment of the invention, the storage mechanism comprises a fixed plate, second slide bars, a first sliding frame, a second return spring and a sliding box, wherein the fixed plate is connected to the bottom of the fixed table, the two second slide bars are connected to the fixed plate in a sliding manner, the two second slide bars are arranged in a staggered manner, the first sliding frame is connected to one end of each second slide bar, the two first sliding frames are correspondingly arranged, the second return spring is connected between each first sliding frame and the fixed plate, and the sliding box is connected to each first sliding frame in a sliding manner.

In a preferred embodiment of the present invention, the fixing mechanism is disposed on the rotating frame, the fixing mechanism includes a third fixing frame, a second wedge, a third return spring, a fourth fixing frame, a rotating wheel, a scroll spring, a binding band and a first fixing rod, the third fixing frame is coupled to the top of the rotating frame, the second wedge is slidably connected to the third fixing frame, the third return spring is connected between the second wedge and the third fixing frame, a pair of fourth fixing frames are coupled to the top of the rotating frame, the rotating wheel is rotatably connected between the pair of fourth fixing frames, the scroll spring is coupled to the rotating wheel, the binding band is coupled to the scroll spring, and the first fixing rod is coupled to one end of the binding band.

In a preferred embodiment of the invention, the clamping mechanism is arranged on the fixed table and comprises a first bevel gear, a fifth fixed frame, a second fixed rod, a flat gear, a second bevel gear, a second sliding frame, a fourth reset spring, a rack, a sixth fixed frame and a third wedge block, wherein one end of the rotating wheel is connected with the first bevel gear, a pair of fifth fixed frames are connected on the fixed table in a coupling way, the fifth fixed frame is connected with the second fixed rod in a rotating way, the flat gear is connected on the second fixed rod in a coupling way, one end of the second fixed rod is connected with the second bevel gear, the second bevel gear is meshed with the first bevel gear, the fifth fixed frame is connected with the second sliding frame in a sliding way, the fourth reset spring is connected between the second sliding frame and the fifth fixed frame, the rack is connected on the second sliding frame, the sixth fixed frame is connected on the second sliding frame, and one end of the rotating shaft is connected with the third wedge block, the third wedge contacts the second carriage.

In a preferred embodiment of the invention, the device further comprises a sliding mechanism, the sliding mechanism is arranged on the rotating frame, the sliding mechanism comprises a third sliding frame, a fifth return spring, a third fixed rod and a rolling wheel, the second fixed block, the third fixed block, the wedge frame, sliding block and sixth reset spring, sliding connection has the third carriage on the rotating turret, be connected with fifth reset spring between third carriage and the rotating turret, the hookup has the third dead lever on the third carriage, the symmetry rotary type is connected with the wheel that rolls on the third carriage, the symmetrical hookup in rotating turret bottom has the second fixed block, common slidingtype is connected with the wedge frame on two second fixed blocks of homonymy, wedge frame and third carriage slidingtype cooperation, the hookup has the third fixed block on the wedge frame, the symmetry slidingtype is connected with the sliding block on the wedge frame, the sliding block card is gone into on the third carriage, be connected with sixth reset spring between second fixed block and the wedge frame.

The invention has the beneficial effects that:

through the cooperation of second wedge and bandage and device above that, the bandage can restrict the patient, prevents to rock at the in-process that transports the patient and makes the patient drop, and the second wedge can block first dead lever simultaneously, has reached and can prevent effectively that the in-process that transports the patient makes the patient drop the effect that causes the secondary damage.

Through the cooperation of second carriage and third wedge-shaped piece, can prevent to fold rotating turret and last device at the in-process mistake that transports the patient, further guaranteed transporting patient in-process stability, reached and can keep balanced effect throughout effectively using this equipment to transport patient's in-process.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is an enlarged perspective view of the present invention a.

Fig. 3 is an enlarged perspective view of the present invention B.

Fig. 4 is an enlarged perspective view of the present invention C.

Fig. 5 is a schematic sectional three-dimensional structure of the storage mechanism of the invention.

Fig. 6 is an enlarged perspective view of the present invention D.

Fig. 7 is a partial perspective view of the fixing mechanism of the present invention.

Fig. 8 is a partially cut-away perspective view of the sliding mechanism of the present invention.

Fig. 9 is an enlarged perspective view of the present invention E.

In the figure: 1_ folding mechanism, 11_ stationary stage, 12_ rotating shaft, 13_ rotating frame, 14_ torsion spring, 2_ clamping mechanism, 21_ first stationary frame, 22_ first slide bar, 23_ first wedge block, 24_ first return spring, 25_ second stationary frame, 26_ first stationary block, 3_ storage mechanism, 31_ stationary plate, 32_ second slide bar, 33_ first sliding frame, 34_ second return spring, 35_ slide box, 4_ stationary mechanism, 41_ third stationary frame, 42_ second wedge block, 43_ third return spring, 44_ fourth stationary frame, 45_ rotating wheel, 46_ scroll spring, 47_ strap, 48_ first stationary bar, 5_ clamping mechanism, 51_ first bevel gear, 52_ fifth stationary frame, 53_ second stationary bar, 54_ second bevel gear, 55_ gear, 56_ second sliding frame, 57_ fourth return spring, 58_ rack, 59_ sixth fixed frame, 511_ third wedge block, 6_ sliding mechanism, 61_ third sliding frame, 62_ fifth return spring, 63_ third fixed rod, 64_ rolling wheel, 65_ second fixed block, 67_ third fixed block, 68_ wedge frame, 69_ sliding block, 611_ sixth return spring.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.

Example 1

A foldable disaster area medical rescue stretcher convenient for going upstairs is shown in figures 1-9 and comprises a folding mechanism 1, a clamping mechanism 2 and a storage mechanism 3, wherein the clamping mechanism 2 is arranged on the folding mechanism 1, the folding mechanism 1 is used for packing up the device, the storage mechanism 3 is arranged on the folding mechanism 1, and medical staff can take medical instruments conveniently through the storage mechanism 3.

The folding mechanism 1 comprises a fixed table 11, a rotating shaft 12, a rotating frame 13 and a torsion spring 14, wherein the rotating shaft 12 is symmetrically and rotatably connected to the fixed table 11, the rotating frame 13 is connected to the rotating shaft 12, the rotating frame 13 is in contact with the fixed table 11, the torsion spring 14 is symmetrically connected between the rotating frame 13 and the fixed table 11, and the torsion spring 14 is used for assisting the rotating frame 13 and the upper device thereof to reset.

The clamping mechanism 2 comprises a first fixing frame 21, a first sliding rod 22, a first wedge-shaped block 23, a first reset spring 24, a second fixing frame 25 and a first fixing block 26, wherein the first fixing frame 21 is connected to one side of a rotating frame 13, the first sliding rod 22 is connected to the first fixing frame 21 in a sliding mode, the first wedge-shaped block 23 is connected to one end of the first sliding rod 22, the first wedge-shaped block 23 is used for clamping the first fixing block 26, the first reset spring 24 is connected between the first wedge-shaped block 23 and the first fixing frame 21, the first reset spring 24 is used for driving the first wedge-shaped block 23 to reset, the second fixing frame 25 is connected to one side of the other rotating frame 13, the first fixing block 26 is connected to the second fixing frame 25, and the first fixing block 26 is used for extruding the first wedge-shaped block 23 to move.

The storage mechanism 3 comprises a fixed plate 31, a second slide bar 32, a first sliding frame 33, a second reset spring 34 and a sliding box 35, the fixed plate 31 is connected to the bottom of the fixed table 11, the fixed plate 31 is connected with the two second slide bars 32 in a sliding mode, the two second slide bars 32 are arranged in a staggered mode, one end of each second slide bar 32 is connected with the corresponding first sliding frame 33, the two first sliding frames 33 are arranged correspondingly, the second reset spring 34 is connected between the first sliding frame 33 and the fixed plate 31, the second reset spring 34 is used for driving the first sliding frame 33 to reset, the sliding box 35 is connected to the first sliding frame 33 in a sliding mode, and medical equipment can be placed on the sliding box through the matching of the first sliding frame 33 and the sliding box 35.

When the device needs to be folded, the two rotating frames 13 and the devices thereon are manually pushed to rotate in opposite directions, the torsion spring 14 is compressed accordingly, in the process, the rotating frames 13 push the first sliding frame 33 and the devices thereon to move in the direction of approaching each other, the second return spring 34 is compressed accordingly, so that the device can be folded, the device is convenient to store, and the effect of conveniently folding the device is achieved.

When the medical instrument rack needs to be used, the first sliding rod 22 is pulled manually, the first return spring 24 is compressed accordingly, the first wedge block 23 is enabled not to be clamped on the first fixing block 26, the two rotating frames 13 and the devices on the rotating frames reset under the action of the torsion spring 14 and gravity, then the first sliding rod 22 is loosened, the first sliding rod 22 and the first wedge block 23 reset under the reset action of the first return spring 24, the first sliding frame 33 resets under the reset action of the second return spring 34, through the matching of the first sliding frame 33 and the sliding box 35, the medical instrument can be placed on the sliding frame, and the sliding box 35 is pulled manually, so that the medical instrument is convenient to take and use.

Example 2

On the basis of embodiment 1, as shown in fig. 6 to 9, the medical nursing device further includes a fixing mechanism 4, the fixing mechanism 4 is disposed on the rotating frame 13, the fixing mechanism 4 is used for preventing the patient from falling off due to shaking during the process of transporting the patient, the fixing mechanism 4 includes a third fixing frame 41, a second wedge-shaped block 42, a third return spring 43, a fourth fixing frame 44, a rotating wheel 45, a volute spring 46, a binding band 47 and a first fixing rod 48, the third fixing frame 41 is connected to the top of the rotating frame 13, the second wedge-shaped block 42 is slidably connected to the third fixing frame 41, the second wedge-shaped block 42 is used for clamping the first fixing rod 48, the third return spring 43 is connected between the second wedge-shaped block 42 and the third fixing frame 41, the third return spring 43 is used for driving the second wedge-shaped block 42 to return, a pair of fourth fixing frames 44 is connected to the top of the rotating frame 13, and the rotating wheel 45 is rotatably connected between the pair of fourth fixing frames 44, a scroll spring 46 is connected to the rotating wheel 45, the scroll spring 46 is used for driving a first fixing rod 48 and the device thereon to reset, a bandage 47 is connected to the scroll spring 46, the bandage 47 is used for limiting a patient, and a first fixing rod 48 is connected to one end of the bandage 47.

The clamping mechanism 5 is arranged on the fixed table 11, the clamping mechanism 5 comprises a first bevel gear 51, a fifth fixed frame 52, a second fixed rod 53, a flat gear 54, a second bevel gear 55, a second sliding frame 56, a fourth return spring 57, a rack 58, a sixth fixed frame 59 and a third wedge block 511, one end of a rotating wheel 45 is connected with the first bevel gear 51, the first bevel gear 51 is used for driving the second bevel gear 55 and the devices thereon to rotate, the fixed table 11 is connected with a pair of fifth fixed frames 52, the fifth fixed frame 52 is connected with the second fixed rod 53 in a rotating mode, the second fixed rod 53 is connected with the flat gear 54, the flat gear 54 is used for driving the rack 58 and the devices thereon to move, one end of the second fixed rod 53 is connected with the second bevel gear 55, the gear 55 is meshed with the first bevel gear 51, the fifth fixed frame 52 is connected with the second sliding frame 56 in a sliding mode, a fourth return spring 57 is connected between the second sliding frame 56 and the fifth fixing frame 52, a rack 58 is connected to the second sliding frame 56, a sixth fixing frame 59 is connected to the second sliding frame 56, a third wedge 511 is connected to one end of the rotating shaft 12, the rotating frame 13 and the upper device thereof can be prevented from being folded by mistake in the process of conveying the patient through the matching of the second sliding frame 56 and the third wedge 511, and the third wedge 511 is contacted with the second sliding frame 56.

The sliding mechanism 6 is arranged on the rotating frame 13, the sliding mechanism 6 comprises a third sliding frame 61, a fifth reset spring 62, a third fixed rod 63, a rolling wheel 64, a second fixed block 65, a third fixed block 67, a wedge-shaped frame 68, a sliding block 69 and a sixth reset spring 611, the rotating frame 13 is connected with the third sliding frame 61 in a sliding manner, the fifth reset spring 62 is connected between the third sliding frame 61 and the rotating frame 13, the fifth reset spring 62 is used for driving the third sliding frame 61 to reset, the third sliding frame 61 is connected with the third fixed rod 63 in a connecting manner, the rolling wheel 64 is connected on the third sliding frame 61 in a symmetrical and rotating manner, the second fixed block 65 is connected at the bottom of the rotating frame 13 in a symmetrical manner, the wedge-shaped frames 68 are connected on the two second fixed blocks 65 on the same side in a sliding manner together, the wedge-shaped frame 68 is used for clamping the third sliding frame 61, and the wedge-shaped frame 68 is matched with the third sliding frame 61 in a sliding manner, the wedge frame 68 is connected with a third fixed block 67, the wedge frame 68 is symmetrically and slidably connected with sliding blocks 69, the sliding blocks 69 are clamped on the third sliding frame 61, a sixth return spring 611 is connected between the second fixed block 65 and the wedge frame 68, and the sixth return spring 611 is used for driving the wedge frame 68 to return.

Then, the patient lies on the top of the fixed table 11 and the rotating frame 13, then the first fixing rod 48 and the device thereon are manually pulled to move towards the direction close to the third fixed frame 41, the volute spiral spring 46 is stretched accordingly, the first fixing rod 48 pushes the second wedge-shaped block 42 to move, the third return spring 43 is compressed accordingly, the first fixing rod 48 is contacted with the other side of the second wedge-shaped block 42 subsequently, the second wedge-shaped block 42 is reset under the reset action of the third return spring 43, so that the second wedge-shaped block 42 clamps the first fixing rod 48, the patient can be conveniently limited by the binding band 47, the patient is prevented from shaking and falling off in the process of conveying the patient, and the effect of effectively preventing the patient from falling off and causing secondary injury in the process of conveying the patient is achieved.

In the process of pulling out the first fixing rod 48 and the device thereon, the rotating wheel 45 and the device thereon can be reversed, the first bevel gear 51 can drive the second bevel gear 55 and the device thereon to rotate clockwise, after the patient is conveyed to a proper position, the second wedge-shaped block 42 needs to be pushed manually, the third return spring 43 can be compressed accordingly, so that the second wedge-shaped block 42 no longer limits the first fixing rod 48, the first fixing rod 48 and the device thereon can be reset under the reset action of the scroll spring 46, then the second wedge-shaped block 42 is released, and the second wedge-shaped block 42 can be reset under the reset action of the third return spring 43.

In the process of resetting the first fixed rod 48 and the devices thereon, the rotating wheel 45 and the devices thereon rotate clockwise, the first bevel gear 51 drives the second bevel gear 55 and the devices thereon to rotate reversely, the flat gear 54 drives the rack 58 and the devices thereon to move, and the fourth reset spring 57 is compressed accordingly, so that the second sliding frame 56 does not limit the third wedge 511 any more, the rotating frame 13 and the devices thereon can be folded conveniently, the rotating frame 13 and the devices thereon can be prevented from being folded by mistake in the process of transporting patients through the matching of the second sliding frame 56 and the third wedge 511, the stability in the process of transporting patients is further ensured, and the effect of effectively and always keeping balance in the process of transporting patients by using the equipment is achieved.

During the folding process of the rotating frame 13 and the device thereon, the flat gear 54 is separated from the rack 58, and the rack 58 and the device thereon are reset along with the reset of the fourth reset spring 57.

During the folding process of the rotating frame 13 and the upper device thereof, the sliding block 69 moves under the action of its own gravity, so that the sliding block 69 no longer catches the third sliding frame 61, then the third sliding frame 61 and the upper device thereof can be manually pushed to move, the fifth return spring 62 is stretched, so that the third sliding frame 61 and the upper device thereof can be retracted, during the process, the third sliding frame 61 pushes the wedge frame 68 and the upper device thereof to move, the sixth return spring 611 is then compressed, so that the wedge frame 68 no longer catches the third sliding frame 61, then the third sliding frame 61 contacts with the other side of the wedge frame 68, and the wedge frame 68 and the upper device thereof are reset under the resetting action of the sixth return spring 611, so that the wedge frame 68 catches the lower part of the third sliding frame 61, and the third sliding frame 61 and the upper device thereof are prevented from being reset.

When the rotating frame 13 and the devices thereon are reset, the second sliding frame 56 and the devices thereon are manually pulled to move, the fourth return spring 57 is compressed, the sixth fixing frame 59 pushes the third fixing block 67 and the devices thereon to move, the sixth return spring 611 is compressed, so that the wedge-shaped frame 68 no longer catches the third sliding frame 61, the third sliding frame 61 and the devices thereon are then reset by the reset action of the fifth return spring 62, then the second sliding frame 56 is released, the second sliding frame 56 is reset by the reset action of the fourth return spring 57, the third fixed block 67 and the devices thereon are reset by the reset action of the sixth return spring 611, so that the wedge-shaped bracket 68 again catches the third sliding bracket 61, the sliding block 69 will then be reset by the effect of gravity, by means of the rolling wheel 64, the device is facilitated to be pushed, and repeated use of the device is made possible by repeating the above operations.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.