CN112278059A

CN112278059A - Folding baby carriage

Info

Publication number: CN112278059A
Application number: CN202011398094.4A
Authority: CN
Inventors: 张发辉
Original assignee: Zhongshan Tongxin Daily Products Co ltd
Current assignee: Zhongshan Tongxin Daily Products Co ltd
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2021-01-29
Anticipated expiration: 2040-12-04
Also published as: CN112278059B

Abstract

The invention discloses a foldable children's stroller, and the invention provides a folding type children's stroller which is simple in retracting way, convenient for folding, small in volume after folding, stable and reliable in structure and high in safety. The invention includes a foldable cart frame and a seat connected thereon. The seat includes a seat surface, a backrest is arranged above the seat surface, and the lower end of the backrest is connected to the rear of the seat surface through a folding joint; the seat also includes a base, the seat surface It is rotatably connected to the base; the push rod of the cart frame, the support rod and the bottom frame arranged in an X shape with the push rod, there is a sliding lock between the top of the support rod and the lower part of the seat for restricting the top of the support rod to slide forward. When the folding stroller is unfolded, the sliding lock locks the seat, the push rod, the support rod and the bottom frame while locking the top of the push rod. The invention is a baby walking tool which is convenient to be folded and carried.

Description

Folding baby carriage

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of trolleys, in particular to a folding type children trolley.

[ background of the invention ]

For the transportation, the storage and carrying of making things convenient for children's shallow, most children's shallow is beta structure, and beta structure of the foldable children's shallow on the existing market is mostly such single structures such as flexible, slip, rotation, has following problem: 1. due to the limitation of a folding structure, folding operation is often carried out by matching two hands when the folding operation is carried out; 2. the folding structure is unreasonable, the friction force of the matching position is large, the structure is fragile, the folding is labor-consuming, and the folding is difficult and easy to damage; 3. because the folding structure is not provided with a folding lock, the safety problem is easily caused; 4. the backrest is inconvenient to fold and difficult to fold; 5. the folding structure is imperfect, the volume is still larger after folding, the space is occupied, and the portability is poor; 6. both hands are required to be folded, one hand cannot operate, and the like.

The present invention has been made based on such a situation.

[ summary of the invention ]

The invention aims to overcome the defects of the prior art and provides the folding type child stroller which is simple in folding mode, convenient to fold, small in size after being folded, stable and firm in structure and high in safety.

The invention is realized by the following technical scheme:

a folding stroller comprises a folding stroller frame and a seat connected to the folding stroller frame, wherein the seat comprises a seat surface, a backrest is arranged above the seat surface, and the lower end of the backrest is connected to the tail of the seat surface through a folding joint.

The folding stroller comprises a first rotating element fixed at the lower end of the backrest and a second rotating element fixed at the tail part of the seat, a key is arranged between the first rotating element and the second rotating element, a rotating shaft is arranged between the first rotating element and the key and hinged through the rotating shaft, and a joint locking device used for locking the first rotating element and the second rotating element is arranged between the first rotating element and the key.

The foldable stroller comprises a first sliding groove radially arranged on the end surface of the first rotating element, a second sliding groove radially arranged on the end surface of the second rotating element, a third sliding groove arranged in a non-radial manner and arranged on the end surface of the key, wherein one end of the third sliding groove is close to the axis of the rotating shaft, and the other end of the third sliding groove is far away from the axis of the rotating shaft; when the backrest is turned upwards, the second sliding groove and the first sliding groove are overlapped, and the pin shaft is simultaneously positioned in the first sliding groove and the second sliding groove, so that the first rotating element and the second rotating element cannot rotate relatively to lock the folding joint;

the end face of the first rotating element is also provided with an arc-shaped fourth sliding chute arranged around the axis of the rotating shaft, and one end of the first sliding chute close to the axis of the rotating shaft is communicated with one end of the fourth sliding chute; when the key is pressed, the key rotates around the rotating shaft, meanwhile, the third sliding groove pushes the pin shaft to slide along the first sliding groove and the second sliding groove to the axis direction of the rotating shaft, the pin shaft slides to one end, close to the axis of the rotating shaft, of the first sliding groove and the second sliding groove and enters the fourth sliding groove, and at the moment, the pin shaft is located in the second sliding groove and the fourth sliding groove simultaneously and enables the first rotating element and the second rotating element to rotate relatively, so that the folding joint is unlocked.

According to the folding stroller, the first spring which enables the pin shaft to slide along the third sliding groove in the direction away from the axis of the rotating shaft is arranged on the key, the first spring is sleeved on the rotating shaft, one end of the first spring is fixed on the key, and the other end of the first spring is clamped on the pin shaft.

The foldable stroller as described above, the seat further comprises a base, and the seat surface is rotatably connected to the base.

According to the folding stroller, the base is provided with the rotation locking device for locking the seat to limit the seat to rotate on the base.

According to the folding stroller, the center of the upper end of the base is provided with the base rotating shaft which protrudes upwards, and the center of the lower end of the seat surface is provided with the rotating shaft hole for the base rotating shaft to insert and rotate in; the upper end of the base is also provided with an annular groove, and the lower end of the chair seat is also provided with an annular boss which protrudes downwards and can rotate in the annular groove;

the rotation locking device comprises a fifth sliding groove which is arranged on the base and is communicated with the annular groove, the fifth sliding groove is radially arranged along the base, a locking block which can slide in the fifth sliding groove is arranged in the fifth sliding groove, a second spring which pulls the locking block towards the center of the base is further arranged in the fifth sliding groove, at least one notch which can be inserted by the locking block is arranged on the annular boss, and when the locking block is pulled outwards from the notch, the chair seat can freely rotate on the base.

The foldable stroller comprises a frame, a support rod and an underframe, wherein the frame comprises a telescopic push rod, the support rod and the underframe are arranged in an X shape with the push rod and used for supporting a seat, the underframe is provided with wheels, the tail part of the seat is rotatably connected to the middle part of the push rod, the lower end of the push rod is rotatably and slidably connected to the underframe, the lower end of the support rod is rotatably connected to the tail part of the underframe, the upper end of the support rod is rotatably and slidably connected to the lower part of the seat, the middle part of the support rod is provided with a support shaft, and the support shaft is pressed against the; and a sliding lock for limiting the top end of the supporting rod to slide forwards is arranged between the top end of the supporting rod and the lower part of the seat, and when the foldable stroller is in an unfolded state, the sliding lock locks the top end of the push rod and simultaneously locks the seat, the push rod, the supporting rod and the underframe.

According to the folding stroller, the top end of the support rod is connected with the sliding shaft, and the side surface of the seat is provided with the sixth sliding groove which is arranged along the front-back direction and is used for the sliding shaft to insert and slide back and forth; the sliding lock is arranged at the rear part of the sixth sliding chute and comprises a lock head part and a lock tail part, the front end of the lock head part is in an inverted hook shape capable of hooking the sliding shaft to limit the sliding shaft to slide forwards, a third spring used for downwards jacking the front part of the lock head part is arranged between the upper part of the front part of the lock head part and the seat, and the middle part of the lock head part is rotatably connected to the side surface of the seat; the lock tail part is in a lever shape with the middle part rotatably connected to the side surface of the seat, and the front end of the lock tail part is pressed on the rear end of the lock head part from top to bottom.

According to the folding stroller, the side surface of the seat is further provided with an unlocking device, the unlocking device comprises a seventh sliding groove which is inwards concave from the side surface of the seat in the left-right direction, a locking block capable of sliding in the seventh sliding groove is arranged in the seventh sliding groove, and a protruding part is arranged at the lower part of the locking block; when the lock block slides outwards, the bulge part can slide to the upper part of the lock tail part and is pressed against the rear part of the rotary connection part of the lock tail part and the seat, so that the rotation of the tail end of the lock tail part upwards and the rotation of the front end downwards are limited; and a fourth spring for pushing the locking block outwards is arranged between the locking block and the second sliding groove.

Compared with the prior art, the invention has the following advantages:

1. the invention relates to a folding type children stroller, wherein the lower end of a backrest is connected to the tail part of a chair surface through a folding joint. The folding joint can realize the rotation connection, the locking and the unlocking at the same time, the unlocking operation is simple, the single hand can operate, and in addition, the folding joint has a simple structure and is easy to manufacture.

2. The seat comprises a base and a seat surface, wherein the seat surface is rotatably connected to the base. Therefore, the seat surface can rotate on the base by 360 degrees, on one hand, the interestingness is increased, the seat can rotate, the fun can be increased for children on the seat, and the dysphoria is avoided; secondly, when the child is blown out from the windward side, the seat can be rotated 180 degrees on the base, so that the baby and the child sitting on the seat can be enabled to be back to the front direction of the vehicle, and the situation that the face of the baby and the child is directly blown out by the wind to cause illness is avoided. Of course, when the seat is provided with the backrest, the backrest can be folded in a way that the top end of the backrest is folded towards the direction of the vehicle head, and can also be folded in the following way: the chair seat is rotated 180 degrees on the base, then the backrest is folded, and the top end of the backrest is folded towards the tail direction of the vehicle, so that the volume after folding is smaller.

3. And a sliding lock for limiting the top end of the supporting rod to slide forwards is arranged between the top end of the supporting rod and the lower part of the seat, and when the foldable stroller is in an unfolded state, the sliding lock locks the top end of the push rod and simultaneously locks the seat, the push rod, the supporting rod and the underframe. The side of the seat is also provided with an unlocking device, when unlocking is needed, the locking block is pressed inwards by hands, the locking block slides inwards and is separated from the tail part of the lock, the tail end handle of the tail part of the lock is pulled upwards, and the tail end of the lock can rotate upwards and the front end of the lock can rotate downwards, so that unlocking is achieved. The unlocking device plays a role of a safety lock, and safety accidents caused by the fact that the sliding lock is unlocked accidentally are avoided. In addition, the handle at the tail end of the lock tail part is pulled upwards by a hand, and the lock block is pressed inwards by one hand, so that when the handle at the tail end of the lock tail part is held by a hand, the ring finger can reach and press the lock block inwards, and the unlocking can be realized by one hand.

[ description of the drawings ]

The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings, in which:

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is an exploded view of the folding joint of the present invention;

FIG. 3 is a cross-sectional view of a folding joint of the present invention;

FIG. 4 is a schematic view of a portion of the seat of the present invention;

FIG. 5 is an exploded view of the base of the present invention;

FIG. 6 is a side view of the present invention;

FIG. 7 is a schematic perspective view of another embodiment of the present invention;

FIG. 8 is a schematic view of a folded configuration of the present invention;

fig. 9 is an exploded view of the folded configuration of the present invention.

[ detailed description ] embodiments

The invention is further described below with reference to the accompanying drawings:

in order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description. In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

A foldable stroller as shown in fig. 1-9, comprising a foldable stroller frame 1 and a seat 2 connected thereto, wherein the seat 2 comprises a seat surface 21, a backrest 22 is arranged above the seat surface 21, and the lower end of the backrest 22 is connected to the rear part of the seat surface 21 through a foldable joint 23. The folding joint 23 can simultaneously realize rotation connection, locking and unlocking, and is simple in unlocking operation and operable by a single hand.

Specifically, as shown in fig. 1 to 3, the folding joint 23 includes a first rotating element 221 fixed at the lower end of the backrest 22 and a second rotating element 211 fixed at the rear portion of the seat 21, a button 231 is disposed between the first rotating element 221 and the second rotating element 211, a rotating shaft 232 is disposed between the first rotating element 221, the second rotating element 211 and the button 231 and is hinged through the rotating shaft 232, and a joint locking device for locking the first rotating element 221 and the second rotating element 211 to each other is disposed between the first rotating element 221, the second rotating element 211 and the button 231.

Specifically, the joint locking device includes a first sliding slot 2211 radially disposed on an end surface of the first rotating element 221, a second sliding slot 2111 radially disposed on an end surface of the second rotating element 211, a third sliding slot 2311 non-radially disposed on an end surface of the key 231, one end of the third sliding slot 2311 being close to an axis of the rotating shaft 232 and the other end being far away from the axis of the rotating shaft 232, and a pin 233 sequentially passing through the first sliding slot 2211, the second sliding slot 2111 and the third sliding slot 2311; when the backrest 22 is turned up, the second sliding slot 2111 and the first sliding slot 2211 are overlapped, and the pin 233 is simultaneously positioned in the first sliding slot 2211 and the second sliding slot 2111, so that the first rotating element 221 and the second rotating element 211 cannot rotate relatively to lock the folding joint 23;

the button 231 is used for locking or unlocking the folding joint 23, when the pin 233 is simultaneously located in the first sliding slot 2211 and the second sliding slot 2111, because the first sliding slot 2211 and the second sliding slot 2111 are overlapped and simultaneously limited by the rotating shaft 232 and the pin 233, the first rotating element 221 and the second rotating element 211 cannot rotate relatively, the first rotating element 221 is folded downwards and is not moved, and the folding joint 23 is in a locking state. Thus, safety can be ensured, and safety accidents caused by the fact that the folding joint 23 is folded accidentally can be prevented.

An arc-shaped fourth sliding groove 2212 arranged around the axis of the rotating shaft 232 is further arranged on the end face of the first rotating element 221, and one end of the first sliding groove 2211 close to the axis of the rotating shaft 232 is communicated with one end of the fourth sliding groove 2212; when the key 231 is pressed down, the key 231 rotates around the rotating shaft 232, meanwhile, the third sliding slot 2311 pushes the pin shaft 233 to slide along the first sliding slot 2211 and the second sliding slot 2111 towards the axis of the rotating shaft 232, after the pin shaft 233 slides to one end of the first sliding slot 2211 and the second sliding slot 2111 close to the axis of the rotating shaft 232, the pin shaft 233 enters the fourth sliding slot 2212, at this time, the pin shaft 233 is simultaneously positioned in the second sliding slot 2111 and the fourth sliding slot 2212, and the first rotating element 221 and the second rotating element 211 can rotate relatively, so that the folding joint 23 is unlocked.

When the button 231 is pressed downward, the button 231 rotates around the rotating shaft 232, during the rotation, the third sliding slot 2311 pushes the pin 233, the pin 233 slides along the first sliding slot 2211 and the second sliding slot 2111 towards the axial center of the rotating shaft 232 under the action of the pushing force, when the first sliding slot 2211 and the second sliding slot 2111 slide to one end of the first sliding slot 2211 and the second sliding slot 2111 close to the axial center of the rotating shaft 232, the pin 233 enters the fourth sliding slot 2212, because the fourth sliding slot 2212 is arranged around the axial center of the rotating shaft 232, namely the sliding action of the pin 233 in the fourth sliding slot 2212 is a rotating action around the axial center of the rotating shaft 232, and at this time, the second sliding slot 2111 is stationary relative to the pin 233, the first rotating element 221 and the second rotating element 211 can rotate relatively, the folding joint 23 is unlocked, and the first rotating element 221 can be folded.

This folding is convenient to operate, and the button 231 can be folded by pressing down with one hand without applying too much force; in addition, the folding structure can prevent safety accidents caused by misoperation due to the folding lock, and is high in safety and more stable

Specifically, the button 231 is provided with a first spring 234 which enables the pin 233 to slide along the third sliding groove 2311 in a direction away from the axis of the rotating shaft 232, the first spring 234 is sleeved on the rotating shaft 232, one end of the first spring 234 is fixed on the button 231, and the other end of the first spring 234 is clamped on the pin 233. The first spring 234 provides a restoring force for automatically restoring the folding joint 23 from the unlocked state to the locked state, and the first spring 234 may achieve automatic self-locking of the folding joint 23.

Specifically, as shown in fig. 1 and 4, the seat 2 further includes a base 24, and the seat surface 21 is rotatably connected to the base 24. Therefore, the seat surface 21 can rotate on the base 2 for 360 degrees, on one hand, the interestingness is increased, the seat can rotate, the fun can be increased for children on the seat, and the dysphoria is avoided; secondly, when the baby is blown out from the head-on side by strong wind, the chair surface 21 can be rotated 180 degrees on the base 24, so that the baby and the child sitting on the chair surface 21 can be enabled to be back to the front direction of the car, and the situation that the face of the baby and the child is directly blown by the wind to cause illness is avoided. Of course, when the backrest 22 is provided on the seat, the backrest 22 can be folded in such a way that the top end thereof is folded toward the vehicle head direction, and can also be folded in the following way: the seat 21 is rotated 180 degrees on the base 24, and then the backrest 22 is folded, and the top end of the backrest is folded towards the tail direction of the vehicle, so that the folded volume is smaller.

Specifically, the base 24 is provided with a rotation locking device for locking the seat 21 to limit the rotation of the seat on the base 24.

Specifically, the center of the upper end of the base 24 is provided with a base rotating shaft 241 protruding upwards, and the center of the lower end of the seat 21 is provided with a rotating shaft hole 212 for the base rotating shaft 241 to be inserted and rotate in; the upper end of the base 24 is also provided with an annular groove 242, and the lower end of the seat 21 is also provided with an annular boss 213 which protrudes downwards and can rotate in the annular groove 242;

the rotation locking device includes a fifth sliding groove 243 disposed on the base 24 and penetrating the annular groove 242, the fifth sliding groove 243 is disposed along the radial direction of the base 24, a locking block 244 capable of sliding in the fifth sliding groove 243 is disposed in the fifth sliding groove 243, a second spring 245 pulling the locking block 244 toward the center of the base 24 is further disposed in the fifth sliding groove 243, at least one notch 214 capable of being inserted by the locking block 244 is disposed on the annular boss 213, and preferably, one notch 214 is disposed in the front-back direction of the seat 21. When the locking block 244 is pulled outward away from the notch 214, the seat 21 can rotate freely on the base 24.

The rotation locking device is in a pull-out unlocking mode, and when the rotation locking device is not unlocked, the locking block 244 is inserted into the notch 214 under the action of the second spring 245, so that the seat 21 is clamped and cannot rotate; to unlock, the locking block 244 is pulled outward by hand, and the locking block 244 is pulled out of the notch 214, so that the seat 21 can rotate freely. Of course, the rotational locking device can also be in a pressing type unlocking mode.

As shown in fig. 5, the rotation locking device further includes a locking cover 246 for supporting the locking block 244 against falling off, and the locking cover 246 is fixedly connected to the bottom surface of the base 24, preferably by means of screws.

Preferably, as shown in fig. 6 and 7, the front end of the seat 21 is preferably rotatably connected with a front bracket 26, and the rotatable connection is preferably hinged; handrails 27 are preferably rotatably connected to two sides of the top end of the front support 26, and the rotatable connection is preferably hinged; the handrail 27 other end can be dismantled and rotate to be connected backrest 22 middle part, and the two preferably adopts the joint, promptly the outside protrusion in backrest 22 middle part forms the protruding axle, is equipped with the round recess on this protruding axle, handrail 27 both ends are equipped with can overlap the epaxial semicircular hole of this protruding, and this downthehole being equipped with can block into this recess and can be in wherein pivoted trip. Thus, the backrest 22, the seat 21, the front support 26 and the armrests 27 form a parallelogram structure, so that the front support 26 and the armrests 27 are linked to be folded together when the backrest 22 is folded. Of course, the connection between the armrest 27 and the middle of the backrest 22 may be detached and folded separately.

Specifically, the cart frame 1 comprises a telescopic push rod 11, a support rod 12 arranged in an X-shaped manner with the push rod 11 and used for supporting the seat 2, and an underframe 13 with wheels, wherein the tail part of the seat 2 is rotatably connected to the middle part of the push rod 11, the lower end of the push rod 11 is rotatably and slidably connected to the underframe 13, the lower end of the support rod 12 is rotatably connected to the tail part of the underframe 13, the upper end of the support rod 12 is rotatably and slidably connected to the lower part of the seat 2, a support shaft 121 is arranged in the middle part of the support rod 12, and the support shaft 121 is pressed against the push rod 11 from top to bottom and; a sliding lock 14 for limiting the top end of the supporting rod 12 to slide forwards is arranged between the top end of the supporting rod 12 and the lower part of the seat 2, and when the folding type baby stroller is in an unfolded state, the sliding lock 14 locks the top end of the push rod 11 and simultaneously locks the seat 2, the push rod 11, the supporting rod 12 and the underframe 13. The supporting shaft 121 and the push rod 11 are in separable contact without being hinged, so that the structure is simpler, the maintenance and the disassembly are more convenient, in addition, because the force borne by the joint of the supporting rod 12 and the push rod 11 is larger, the fixed connection between the supporting rod 12 and the push rod 11 is easy to damage, and the separable contact connection mode of the supporting rod 12 can reduce the abrasion and prolong the service life. When the stroller is unfolded, the sliding lock 14 locks the top end of the supporting rod 12 to limit the forward sliding on the seat 2, and then the seat 2, the push rod 11, the supporting rod 12 and the chassis 13 are locked, so that the stroller cannot be folded. Therefore, the folding structure of the children's cart with the sliding lock 14 can ensure that the unfolded state is locked firmly, stably and safely; secondly, safety accidents caused by accidental folding of the seat can be avoided; thirdly, the folding is simple and convenient when the bicycle is folded, and only the sliding lock 14 is operated.

When the child stroller needs to be folded, the operation is simple, the sliding lock 14 is operated only to release the top end of the supporting rod 12, the top end of the supporting rod 12 can slide forwards on the seat 2, at the moment, the lower end of the push rod 11 can rotate downwards on the bottom frame 13 and slide forwards, the lower end of the supporting rod 12 rotates downwards around the bottom frame 13, the tail part of the seat 2 rotates downwards around the push rod 11, and therefore the child stroller is folded downwards.

Specifically, the top end of the support rod 12 is connected with a sliding shaft 122, and the side surface of the seat 2 is provided with a sixth sliding chute 25 which is arranged along the front-back direction and is used for the sliding shaft 122 to be inserted and slide back and forth; the slide lock 14 is arranged at the rear part of the sixth sliding groove 25, the slide lock 14 comprises a lock head part 141 and a lock tail part 142, the front end of the lock head part 141 is in a reverse hook shape which can hook the sliding shaft 122 to limit the slide forward, a third spring 143 for pushing the front part of the lock head part 141 downwards is arranged between the upper part of the front part of the lock head part 141 and the seat 2, and the middle part of the lock head part 141 is rotatably connected to the side surface of the seat 2; the lock tail part 142 is in a lever shape with the middle part rotatably connected to the side surface of the seat 2, and the front end of the lock tail part 142 is pressed on the rear end of the lock head part 141 from top to bottom. The tail end of the lock tail 142 is preferably provided with a handle. When the handle is pulled up by hand, the front end of the lock tail 142 presses the rear end of the lock head 141, and the front end of the lock head 141 is tilted up, thereby releasing the sliding shaft 122.

Specifically, the side surface of the seat 2 is further provided with an unlocking device 15, the unlocking device 15 comprises a seventh sliding groove 151 which is recessed inwards from the side surface of the seat 2 in the left-right direction, a locking block 152 capable of sliding in the seventh sliding groove 151 is arranged in the seventh sliding groove, and a convex part is arranged at the lower part of the locking block 152; when the locking block 152 slides outwards, the protruding part can slide above the lock tail part 142 and press against the back of the rotary joint of the lock tail part 142 and the seat 2, so that the rotation of the tail end of the lock tail part 142 upwards and the front end downwards is limited; a fourth spring 153 for pushing the locking block 152 outward is provided between the locking block 152 and the second runner 2111. When the lock needs to be unlocked, the lock block 152 is pressed inwards by a hand, the lock block 152 slides inwards and is separated from the lock tail part 142, the handle at the tail end of the lock tail part 142 is pulled upwards, and the lock tail part 142 can rotate upwards at the tail end and downwards at the front end. The unlocking device 15 functions as a safety lock to prevent the slide lock 14 from being accidentally unlocked to cause a safety accident. In addition, pulling the handle at the end of the lock tail 142 upward by hand and pressing the lock block 152 inward can be accomplished with one hand, and the ring finger can reach and press the lock block 152 inward while holding the handle at the end of the lock tail 142.

Preferably, as shown in fig. 9, the seat 2 is provided with a sixth sliding groove 25 on each of the left and right sides, the left and right ends of the sliding shaft 122 are respectively inserted into the left and right sixth sliding grooves 25, the rear portion of each sixth sliding groove 25 is provided with a sliding lock 14, and an unlocking device 15 is arranged above only one sliding lock 14; a link 144 for transmission is fixedly connected between the lock tail 142 of the left slide lock 14 and the lock tail 142 of the right slide lock 14. The pair of sixth sliding grooves 25 and the corresponding pair of sliding locks 14 are symmetrically arranged, so that the structure is more stable and firm, and the operation is more labor-saving. Meanwhile, the connecting rod 144 can unlock the unlocking device 4 and the sliding lock 14 by a single hand without two hands, and the operation is simple and convenient.

Preferably, a sliding frame is arranged between the lower end of the push rod 11 and the bottom frame 13, the bottom frame 13 comprises sliding rods in the front-back direction, the lower end of the push rod 11 is rotatably connected to the sliding frame, and the sliding rod is connected with the sliding frame in a sliding mode. Therefore, the lower end of the push rod 11 can be connected to the bottom frame 13 in a sliding and rotating mode, the folding is convenient, and the size is small after the folding.

It is specific, be equipped with the firm clamp that can play supporting role between the two between 2 afterbody of seat and bracing piece 12, firm clamp is including the decurrent elastic clamp of opening, firm clamp upper end is fixed below 2 afterbody of seat, and works as during the shallow expansion state of children, firm clamp's lower extreme elastic clamp pushes down and presss from both sides on bracing piece 12, and the structure is more stable like this.

As shown in fig. 1, 6 and 7, the top end of the push rod 11 is preferably provided with a handle. The support rods 12 are preferably two arranged in the left and right direction. The wheel is preferably two front wheels and two rear wheels, but the front wheel that freely turns to is connected to chassis 13 front end, two rear wheels are connected to chassis 13 rear end, have at least one be equipped with the service brake on the rear wheel, and is more stable a little like this, the front wheel is preferably universal wheel, preferably two respectively establish one on the rear wheel the service brake, left and right foot all can step on the service brake like this.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a foldable children's shallow which characterized in that: the foldable stroller comprises a foldable stroller frame (1) and a seat (2) connected to the foldable stroller frame, wherein the seat (2) comprises a seat surface (21), a backrest (22) is arranged above the seat surface (21), and the lower end of the backrest (22) is connected to the tail of the seat surface (21) through a foldable joint (23).

2. A foldable stroller according to claim 1, wherein: the folding joint (23) comprises a first rotating element (221) fixed at the lower end of the backrest (22) and a second rotating element (211) fixed at the tail of the seat (21), a key (231) is arranged between the first rotating element (221) and the second rotating element (211), a rotating shaft (232) is arranged among the first rotating element (221), the second rotating element (211) and the key (231) and is hinged through the rotating shaft (232), and a joint locking device used for locking the first rotating element (221) and the second rotating element (211) with each other is arranged among the first rotating element (221), the second rotating element (211) and the key (231).

3. A foldable stroller according to claim 2, wherein: the joint locking device comprises a first sliding groove (2211) which is radially arranged on the end face of a first rotating element (221), a second sliding groove (2111) is radially arranged on the end face of a second rotating element (211), a third sliding groove (2311) which is not radially arranged is arranged on the end face of a key (231), one end of the third sliding groove (2311) is close to the axis of a rotating shaft (232), the other end of the third sliding groove (2311) is far away from the axis of the rotating shaft (232), and the joint locking device further comprises a pin shaft (233) which sequentially penetrates through the first sliding groove (2211), the second sliding groove (2111) and the third sliding groove (2311); when the backrest (22) is turned upwards, the second sliding groove (2111) and the first sliding groove (2211) are overlapped, and the pin shaft (233) is simultaneously positioned in the first sliding groove (2211) and the second sliding groove (2111), so that the first rotating element (221) and the second rotating element (211) cannot rotate relatively to lock the folding joint (23);

an arc-shaped fourth sliding groove (2212) arranged around the axis of the rotating shaft (232) is further formed in the end face of the first rotating element (221), and one end, close to the axis of the rotating shaft (232), of the first sliding groove (2211) is communicated with one end of the fourth sliding groove (2212); when the key (231) is pressed down, the key (231) rotates around the rotating shaft (232), meanwhile, the third sliding groove (2311) pushes the pin shaft (233) to slide along the first sliding groove (2211) and the second sliding groove (2111) to the axis direction of the rotating shaft (232), the pin shaft (233) slides to the end, close to the axis of the rotating shaft (232), of the first sliding groove (2211) and the second sliding groove (2111), and then the pin shaft (233) enters the fourth sliding groove (2212), at the moment, the pin shaft (233) is simultaneously positioned in the second sliding groove (2111) and the fourth sliding groove (2212), and the first rotating element (221) and the second rotating element (211) can rotate relatively to unlock the folding joint (23).

4. A foldable stroller according to claim 3, wherein: the button (231) is provided with a first spring (234) which can enable the pin shaft (233) to slide along the third sliding groove (2311) in the direction away from the axis of the rotating shaft (232), the first spring (234) is sleeved on the rotating shaft (232), one end of the first spring (234) is fixed on the button (231), and the other end of the first spring (234) is clamped on the pin shaft (233).

5. A foldable stroller according to claim 1, wherein: the seat (2) further comprises a base (24), and the seat surface (21) is rotatably connected to the base (24).

6. A foldable stroller according to claim 5, wherein: the base (24) is provided with a rotation locking device for locking the chair seat (21) to limit the rotation of the chair seat on the base (24).

7. A foldable stroller according to claim 6, wherein: the center of the upper end of the base (24) is provided with a base rotating shaft (241) which protrudes upwards, and the center of the lower end of the chair surface (21) is provided with a rotating shaft hole (212) for the base rotating shaft (241) to insert and rotate in; the upper end of the base (24) is also provided with an annular groove (242), and the lower end of the chair surface (21) is also provided with an annular boss (213) which protrudes downwards and can rotate in the annular groove (242);

rotate locking device including setting up fifth spout (243) on base (24) and having a perfect understanding with annular groove (242), base (24) radial arrangement is followed in fifth spout (243), be equipped with in fifth spout (243) and can be in gliding latch segment (244) of fifth spout (243), still be equipped with in fifth spout (243) and draw second spring (245) of latch segment (244) toward base (24) center, be equipped with at least one on annular boss (213) and can be locked latch segment (244) male breach (214), when latch segment (244) are pulled out breach (214) outward, seat (21) can freely rotate on base (24).

8. A foldable stroller according to claim 1 or 5, wherein: the cart frame (1) comprises a telescopic push rod (11), a support rod (12) which is arranged in an X-shaped manner with the push rod (11) and used for supporting the seat (2), and an underframe (13) with wheels, wherein the tail part of the seat (2) is rotatably connected to the middle part of the push rod (11), the lower end of the push rod (11) is rotatably and slidably connected to the underframe (13), the lower end of the support rod (12) is rotatably connected to the tail part of the underframe (13), the upper end of the support rod (12) is rotatably and slidably connected to the lower part of the seat (2), a support shaft (121) is arranged in the middle part of the support rod (12), and the support shaft (121) is pressed against the push rod (11) from top to bottom and is in separable; a sliding lock (14) used for limiting the top end of the supporting rod (12) to slide forwards is arranged between the top end of the supporting rod (12) and the lower portion of the seat (2), and when the folding stroller is in an unfolded state, the sliding lock (14) locks the top end of the push rod (11) and simultaneously locks the seat (2), the push rod (11), the supporting rod (12) and the underframe (13).

9. A foldable stroller according to claim 8, wherein: the top end of the supporting rod (12) is connected with a sliding shaft (122), and the side surface of the seat (2) is provided with a sixth sliding groove (25) which is arranged along the front-back direction and is used for the sliding shaft (122) to insert and slide back and forth in the sixth sliding groove; the sliding lock (14) is arranged at the rear part of the sixth sliding groove (25), the sliding lock (14) comprises a lock head part (141) and a lock tail part (142), the front end of the lock head part (141) is in an inverted hook shape capable of hooking the sliding shaft (122) to limit the sliding forward, a third spring (143) used for downwards pressing the front part of the lock head part (141) is arranged between the upper part of the front part of the lock head part (141) and the seat (2), and the middle part of the lock head part (141) is rotatably connected to the side surface of the seat (2); the lock tail part (142) is in a lever shape with the middle part rotatably connected to the side surface of the seat (2), and the front end of the lock tail part (142) is pressed on the rear end of the lock head part (141) from top to bottom.

10. A foldable stroller according to claim 9, wherein: the side surface of the seat (2) is also provided with an unlocking device (15), the unlocking device (15) comprises a seventh sliding groove (151) which is inwards concave from the side surface of the seat (2) in the left-right direction, a locking block (152) capable of sliding in the seventh sliding groove (151) is arranged in the seventh sliding groove, and the lower part of the locking block (152) is provided with a convex part; when the locking block (152) slides outwards, the bulge part can slide to the upper part of the lock tail part (142) and is pressed against the rear part of the rotary connection part of the lock tail part (142) and the seat (2), so that the rotation of the tail end of the lock tail part (142) upwards and the front end downwards is limited; a fourth spring (153) pushing the locking block (152) outwards is arranged between the locking block (152) and the second sliding groove (2111).