CN106627718B

CN106627718B - Child cart

Info

Publication number: CN106627718B
Application number: CN201710040444.1A
Authority: CN
Inventors: 张兴荣; 马福生
Original assignee: Goodbaby Child Products Co Ltd
Current assignee: Goodbaby Child Products Co Ltd
Priority date: 2017-01-20
Filing date: 2017-01-20
Publication date: 2023-08-04
Anticipated expiration: 2037-01-20
Also published as: CN106627718A

Abstract

The invention discloses a stroller, which comprises a stroller frame with unfolding and folding states, wherein the stroller frame comprises side brackets positioned at the left side and the right side and a cross brace assembly arranged between the side brackets at the two sides, each side bracket comprises a front bracket, a rear bracket, a push rod and a seat rod, the front bracket, the rear bracket, the push rod and the seat rod are connected in a rotating way through the same shaft of a rotating shaft, the stroller also comprises a rotating joint arranged at the rotating joint of the front bracket, the rear bracket, the push rod and the seat rod, and when the stroller is folded, the rear bracket, the push rod, the seat rod and the front bracket are overturned and are close to each other. The child cart is simple in structure, can be folded, is small in size after being folded, and is convenient to carry and store.

Description

Child cart

Technical Field

The invention relates to the technical field of children products, in particular to a child trolley.

Background

The child stroller in the prior art comprises a stroller frame with an unfolding position and a folding position, a front wheel assembly and a rear wheel assembly which are arranged at the bottom of the stroller frame, and a locking mechanism for locking the stroller frame in the unfolding state. The existing children's carts are various, the number of cart frame members is different, the connection positions among the members are different, so that the folding principle and the folding mode are different, and the folding effect is different.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a child cart which can be folded and has smaller volume after being folded.

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

the utility model provides a children's shallow, includes has the shallow frame of expansion state and folding state, locates the front wheel subassembly of the bottom front portion of shallow frame, locates the rear wheel subassembly of the bottom rear portion of shallow frame, be used for with the locking mechanical system of shallow frame lock under the expansion state, the shallow frame is including being located respectively the side support of children's shallow left and right sides, locate the both sides the stull subassembly between the side support, every side the side support all includes fore-stock, rear bracket, push rod and seat pole, the fore-stock the rear bracket the push rod the same axle rotation connection through the pivot of four parts of seat pole, children's shallow still includes the setting and is in the fore-stock the rear bracket the push rod the revolute joint of seat pole, when children's shallow is folding, the rear bracket the push rod the seat pole with the fore-stock upset is drawn close to each other.

Preferably, the rotary joint comprises a first joint seat fixedly connected with the front bracket, a second joint seat fixedly connected with the rear bracket, a third joint seat fixedly connected with the push rod and a fourth joint seat fixedly connected with the seat rod, the first joint seat, the second joint seat, the third joint seat and the fourth joint seat are sleeved on the rotating shaft and can be rotationally arranged around the rotating shaft, the locking mechanism comprises a first locking mechanism used for locking the side brackets at each side in an unfolding state, and the first locking mechanism is arranged between any two of the four parts of the first joint seat, the second joint seat, the third joint seat and the fourth joint seat.

Further, the rotary joint further comprises a first convex part arranged on one of the four parts of the first joint seat, the second joint seat, the third joint seat and the fourth joint seat, two parts of the other three parts except the one part are respectively provided with a first chute and a second chute matched with the first convex part, the first convex part is respectively penetrated in the first chute and the second chute, a second convex part is arranged on the third part of the other three parts except the one part, two parts of the other three parts except the one part are respectively provided with a third chute and a fourth chute matched with the second convex part, the first chute and the second chute are circular arc grooves with the same radius size and the same circle center, and when the stroller is in an unfolding state, the first chute is respectively matched with the first chute and the second chute, and two ends of the second chute are respectively matched with the first chute and the second chute.

In a specific embodiment, the first protrusion is disposed on the first joint seat, the first chute is disposed on the second joint seat, the second chute is disposed on the third joint seat, the second protrusion is disposed on the fourth joint seat, the third chute is disposed on the third joint seat, and the fourth chute is disposed on the fourth joint seat.

Further, the first sliding groove, the second sliding groove, the third sliding groove and the fourth sliding groove are arc grooves taking the axle center of the rotating shaft as the circle center, when the baby carriage starts to fold, the push rod and the rear support are turned forwards, and the seat rod and the front support can be turned forwards or backwards.

Further, when one of the four parts of the first joint seat, the second joint seat, the third joint seat and the fourth joint seat rotates, the other three parts are driven to turn over.

Still further, a fifth chute extending along the radial direction is arranged on the first joint seat, a sixth chute extending along the rotating direction is arranged on the second joint seat, a seventh chute extending along the rotating direction is arranged on the third joint seat, an eighth chute extending along the rotating direction is arranged on the fourth joint seat, the rotating joint further comprises a sliding block, the sliding block is respectively matched with the fifth chute, the sixth chute, the seventh chute and the eighth chute, one end of the sliding block is respectively arranged in the fifth chute, the sixth chute, the seventh chute and the eighth chute in a penetrating way, and when the baby stroller is folded, one of the three parts of the push rod, the seat rod and the rear bracket is overturned to be close to the front bracket, and the other two parts of the three parts are driven to be overturned to be close to the front bracket through the matching of the sliding block with the sixth chute, the seventh chute and the eighth chute.

In a specific embodiment, the fifth sliding groove is a straight groove, and the sixth sliding groove, the seventh sliding groove and the eighth sliding groove are involute arc grooves.

Preferably, the cross brace assembly is retractable in a left-right direction, and when the stroller is folded, the cross brace assembly is retracted to bring the side brackets on both sides together.

Further, the cross brace assembly comprises a first brace rod and a second brace rod which are respectively fixedly connected with the side brackets at two sides, the first brace rod and the second brace rod extend along the left-right direction, and the second brace rod can be slidably arranged on the first brace rod along the length extending direction of the first brace rod.

Still further, the first strut has a lumen extending along a length thereof, and the second strut is slidably disposed within the lumen along the length of the lumen.

Further, the cross brace components are provided with a plurality of groups, and the cross brace components are respectively arranged between the front brackets on the left side and the right side, between the rear brackets on the left side and the right side and between the push rods on the left side and the right side, and the structures of the cross brace components are the same or different.

Preferably, the push rod is retractable along its length extension.

Further, the push rod comprises a plurality of support rods which are sequentially connected in sequence along the length extending direction of the push rod, the lower part of the support rod positioned at the lowest part is connected with the rotary joint, and each support rod can be slidably arranged on the adjacent support rod along the length extending direction of the adjacent support rod.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the child cart disclosed by the invention is simple in structure, can be folded, is small in size after being folded, and is convenient to carry and store.

Drawings

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

FIG. 2 is a side view of the stroller of the present invention in an expanded state;

FIG. 3 is a schematic view of the rotary joint according to the present invention (example 1, enlarged view);

FIG. 4 is an exploded view of the revolute joint of the present invention (example 1, enlarged view);

fig. 5 is a schematic view of the structure of the rotary joint according to the present invention (example 2, enlarged view);

FIG. 6 is an exploded view of the revolute joint of the present invention (example 2, enlarged view);

FIG. 7 is one of the perspective views of the child stroller of the present invention during folding;

FIG. 8 is one of the side views of the child stroller of the present invention during folding;

FIG. 9 is a second perspective view of the child stroller of the present invention during folding;

FIG. 10 is a second side view of the child stroller of the present invention during folding;

FIG. 11 is a perspective view of the child stroller of the present invention in a collapsed condition;

fig. 12 is a side view of the stroller of the present invention in a collapsed condition.

Wherein: 1. a side bracket; 11. a front bracket; 12. a rear bracket; 13. a push rod; 14. a seat rod; 15. a grip; 21. a first cross brace; 22. a second cross brace; 23. a third cross brace; 211/221/231, a first stay; 212/222/232, a second brace; 3. a rotating shaft; 4. rotating the joint; 41. a first joint seat; 411. a first convex portion; 412. a fifth chute; 42. a second joint seat; 421. a first chute; 422. a fourth chute; 423. a sixth chute; 43. a third joint seat; 431. a second chute; 432. a third chute; 433. a seventh chute; 44. a fourth joint seat; 441. a second convex portion; 442. an eighth chute; 45. a slide block; 451. a ninth chute; 5. a front wheel assembly; 6. and a rear wheel assembly.

Detailed Description

The technical scheme of the invention is further described below with reference to the attached drawings and specific embodiments.

As shown in fig. 1, 2 and 7 to 12, the child stroller of the present invention includes a stroller frame having an unfolded and folded state, a front wheel assembly 5 provided at a bottom front portion of the stroller frame, a rear wheel assembly 6 provided at a bottom rear portion of the stroller frame, and a locking mechanism for locking the stroller frame in the unfolded state.

The cart frame comprises side brackets 1 respectively positioned at the left side and the right side of the cart frame and a transverse strut assembly connected between the side brackets 1 at the left side and the right side.

The side brackets 1 on each side comprise a front bracket 11, a rear bracket 12, a push rod 13 and a seat rod 14, the front bracket 11 extends along the front-rear direction, the rear bracket 12 is obliquely arranged from front to back and downwards, the front wheel assembly 5 is arranged at the front part of the front bracket 11, the rear wheel assembly 6 is arranged at the lower part of the rear bracket 12, and the rear part of the front bracket 11, the upper part of the rear bracket 12, the lower part of the push rod 13 and the seat rod 14 are connected in a rotating way through the same shaft of the rotating shaft 3.

The transverse support assembly extends in the left-right direction and can stretch in the left-right direction, so that the side supports 1 on the left side and the right side can be closed, and the stroller can be folded in the transverse direction. The cross brace assembly has a plurality of groups, in this embodiment, the cross brace assembly specifically includes a first cross brace 21 disposed between front brackets 11 on the left and right sides, a second cross brace 22 disposed between rear brackets 12 on the left and right sides, and a third cross brace 23 disposed between push rods 13 on the left and right sides, and the structures of the first cross brace 21, the second cross brace 22, and the third cross brace 23 may be the same or different.

In a specific embodiment, taking the first cross brace 21 as an example, the first cross brace 21 includes a first brace bar 211 and a second brace bar 212, where the first brace bar 211 and the second brace bar 212 extend in the left-right direction, one end of the first brace bar 211 is fixedly connected to the side bracket 1 on one side, one end of the second brace bar 212 is fixedly connected to the side bracket 1 on the other side, and the second brace bar 212 is slidably disposed on the first brace bar 211 along the length extending direction of the first brace bar 211. Specifically, the first stay bar 211 is provided with a lumen extending in the longitudinal direction thereof, and the second stay bar 212 is slidably provided in the lumen in the longitudinal direction of the lumen. The second stay 212 extends from the first stay 211 when the stroller frame is in the unfolded state, and the second stay 212 retracts into the first stay 211 when the stroller frame is in the folded state.

The second cross brace 22 also includes a first brace 221 and a second brace 222, and the third cross brace 23 also includes a first brace 231 and a second brace 232, which can be configured in the same manner as the first cross brace 21, and will not be described herein.

The push rod 13 can stretch out and draw back along the length extension direction, so that the volume of the baby carriage is smaller after being folded, and the baby carriage can be suitable for pushing people with different heights. Specifically, the push rod 13 includes a plurality of struts sequentially arranged in order along the length extension direction thereof, and four members of the lower portion of the lowermost strut, the rear portion of the front bracket 11, the upper portion of the rear bracket 12, and the seat bar 14 are rotatably connected by the same shaft of the rotary shaft 3, each strut being slidably disposed on an adjacent strut along the length extension direction of an adjacent strut.

In one embodiment, at least one of the two adjacent struts has a lumen extending along its length, and the other strut is slidably disposed within the lumen along the length of the lumen.

In this embodiment, the push rod 13 includes three struts: the first supporting rod 131, the second supporting rod 132 and the third supporting rod 133 are sequentially arranged in sequence, extend along the same length direction, are respectively provided with a pipe cavity extending along the length direction of the second supporting rod 132 and the third supporting rod 133, the first supporting rod 131 can be slidably arranged in the pipe cavity of the second supporting rod 132, the second supporting rod 132 can be slidably arranged in the pipe cavity of the third supporting rod 133, the third supporting rod 133 is located at the lowest end of the push rod 13, and the lower part of the third supporting rod 133, the rear part of the front support 11, the upper part of the rear support 12 and the seat rod 14 are rotationally connected through the same shaft of the rotating shaft 3.

The side brackets 1 on each side also comprise a handle 15, one end of which is fixedly connected with the upper end of the push rod 13, and the handle 15 is intersected with the push rod 13 to form an L shape. In this embodiment, one end of the grip 15 is fixedly connected to the upper portion of the first strut 131.

The baby stroller further comprises a rotary joint 4 which is arranged at the joint of the front bracket 11, the rear bracket 12, the push rod 13 and the seat rod 14 which are rotatably connected, wherein the rotary joint 4 can adopt the following two structural forms:

example 1

As shown in fig. 3 and 4, the rotary joint 4 includes a first joint seat 41 fixedly connected with the front bracket 11, a second joint seat 42 fixedly connected with the rear bracket 12, a third joint seat 43 fixedly connected with the push rod 13, and a fourth joint seat 44 fixedly connected with the seat rod 14, wherein the first joint seat 41, the second joint seat 42, the third joint seat 43 and the fourth joint seat 44 are all sleeved on the rotating shaft 3 and can be rotatably arranged around the rotating shaft 3, the rotary joint 4 further includes a first protrusion 411 arranged on one of the first joint seat 41, the second joint seat 42, the third joint seat 43 and the fourth joint seat 44, a first sliding groove and a second sliding groove 431 matched with the first protrusion 411 are respectively arranged on two of the other three components except the first component, the first protrusion 421 is respectively arranged in the first sliding groove 421 and the second sliding groove 431 in a penetrating manner, a second protrusion 441 is arranged on the other three components except the first component, the other three components except the first component are respectively arranged on the third part, the other three components except the first protrusion 441, the other three components except the first component 421 are respectively arranged on the third sliding groove and the second sliding groove, the third part 421 is respectively the third sliding groove is respectively the second sliding groove, the radius of the third protrusion is the third sliding groove is the same, the third sliding groove is different from the third sliding groove is different from the first sliding groove, the third sliding groove is different from the third sliding groove, the sliding groove is different from the sliding groove, the sliding groove is different, and the sliding groove is sliding. When the stroller is in the unfolded state, the opposite ends of the first protrusion 411 respectively abut against one end of the first sliding slot 421 and one end of the second sliding slot 431, and the opposite ends of the second protrusion 441 respectively abut against one end of the third sliding slot 432 and one end of the fourth sliding slot 422.

In the present embodiment, the first protrusion 411 is disposed on the first joint seat 41, the second protrusion 441 is disposed on the fourth joint seat 44, the first slide groove 421 and the fourth slide groove 422 are disposed on the second joint seat 42, and the second slide groove 431 and the third slide groove 432 are disposed on the third joint seat 43. Opposite ends of the first protrusion 411 are respectively abutted against a rear end portion of the first sliding groove 421 and a front end portion of the second sliding groove 431 along a rotation direction of the rotation shaft 3, and opposite ends of the second protrusion 441 are respectively abutted against a rear end portion of the fourth sliding groove 422 and a front end portion of the third sliding groove 432. Thus, when the stroller starts to fold, the push rod 13 and the rear bracket 12 can only be turned forward, while the front bracket 11 and the seat post 14 can be turned forward or backward.

The locking mechanism comprises a first locking mechanism for locking the side bracket 1 on each side in the unfolded state, when the rotary joint 4 adopts the structure, the positions of the other two parts can be in the locked state as long as the first locking mechanism locks the positions of two parts of the first joint seat 41, the second joint seat 42, the third joint seat 43 and the fourth joint seat 44, and when the first locking mechanism is unlocked, the first joint seat 41, the second joint seat 42, the third joint seat 43 and the fourth joint seat 44 can rotate around the rotating shaft 3 independently, and when the second joint seat 42 and the third joint seat 43 rotate for a certain angle, the first joint seat 41 and the fourth joint seat 44 can be driven to rotate, so that the push rod 13, the rear bracket 12 and the seat rod 14 are driven to rotate and close to the front bracket 11, and the child stroller is folded.

Example 2

In this embodiment, when one of the four components of the first joint seat 41, the second joint seat 42, the third joint seat 43 and the fourth joint seat 44 is rotated and folded, the other three components can be driven to be turned and folded, and turning linkage can be realized.

Specifically, as shown in fig. 5 and 6, the rotary joint 4 includes a first joint seat 41 fixedly connected to the front bracket 11, a second joint seat 42 fixedly connected to the rear bracket 12, a third joint seat 43 fixedly connected to the push rod 13, and a fourth joint seat 44 fixedly connected to the seat rod 14, and the first joint seat 41, the second joint seat 42, the third joint seat 43, and the fourth joint seat 44 are all disposed around the rotary shaft 3 so as to be rotatable about the rotary shaft 3. The first joint seat 41 is provided with a fifth sliding groove 412 extending along the radial direction, the second joint seat 42 is provided with a sixth sliding groove 423 extending along the rotation direction, the third joint seat 43 is provided with a seventh sliding groove 433 extending along the rotation direction, and the fourth joint seat 44 is provided with an eighth sliding groove 442 extending along the rotation direction. The rotary joint 4 further includes a slider 45, where the slider 45 is respectively matched with the fifth chute 412, the sixth chute 423, the seventh chute 433 and the eighth chute 442, and one end of the slider 45 is respectively inserted into the fifth chute 412, the sixth chute 423, the seventh chute 433 and the eighth chute 442 and can be slidably disposed along the length extension direction of each chute, and meanwhile, the slider 45 can be rotatably and slidably disposed relative to the rotating shaft 3, specifically, a ninth chute 451 matched with the rotating shaft 3 is disposed on the slider 45, and the rotating shaft 3 is inserted into the ninth chute 451. The sixth chute 423, the seventh chute 433 and the eighth chute 442 are different in structural size, in this embodiment, the fifth chute 412 is a straight chute, and the sixth chute 423, the seventh chute 433 and the eighth chute 442 are all involute arc grooves, but the parameters forming the involute arc grooves are different. In this way, a linkage structure is formed among the first joint seat 41, the second joint seat 42, the third joint seat 43 and the fourth joint seat 44, when the baby stroller is folded, one of the three components of the push rod 13, the seat rod 14 and the rear bracket 12 is turned over to be close to the front bracket 11, and the other two of the three components can be driven to be close to the front bracket 11 by matching the sliding block 45 with the sixth sliding groove 423, the seventh sliding groove 433 and the eighth sliding groove 442.

Also, in the present embodiment, as long as the first locking mechanism for locking the side stand 1 in the unfolded state is used to lock the positions of two members out of the four members of the first joint seat 41, the second joint seat 42, the third joint seat 43, and the fourth joint seat 44, the positions of the other two members can be also brought into the locked state.

In the above two embodiments, along the extending direction of the axis of the rotating shaft 3, the third joint seat 43, the second joint seat 42, the first joint seat 41 and the fourth joint seat 44 located on the left and right sides of the stroller are sequentially disposed from the inner side to the outer side of the stroller, and the first locking mechanism is disposed between the second joint seat 42 and the third joint seat 43 to lock the positions of the second joint seat 42 and the third joint seat 43.

The locking mechanism further comprises a second locking mechanism for locking the cross-brace assembly in the deployed state and a third locking mechanism for locking the push rod 13 in different length positions. The second locking mechanism is disposed between the first and second braces 211/221/231 and 212/222/232, respectively, of each set of cross brace assemblies. The third locking mechanism is provided between each adjacent two struts of the push rod 13, respectively.

When the stroller is in the unfolded state, the first locking mechanism, the second locking mechanism and the third locking mechanism are in the locked state, the second supporting rods 212/222/232 extend from the first supporting rods 211/221/231, the first supporting rod 131 extends from the tube cavity on the second supporting rod 132, and the second supporting rod 132 extends from the tube cavity on the third supporting rod 133, as shown in fig. 1 and 2.

When the stroller is folded, the third locking mechanism is unlocked to retract the first strut 131 into the lumen on the second strut 132, and the second strut 132 is retracted into the lumen on the third strut 133, as shown in fig. 7 and 8; then unlocking the second locking mechanism, so that the second stay bar 212/222/232 is retracted into the lumen on the first stay bar 211/221/231, and the side brackets 1 on the left side and the right side are closed together along the left-right direction; finally, the first locking mechanism is unlocked, and if the rotary joint 4 adopts the structure in the embodiment 1, after the first locking mechanism is unlocked, the rear bracket 12 and the push rod 13 are respectively operated to turn forward around the rotary shaft 3 and gradually close to the front bracket 11, when the push rod 13 continues to turn forward to close to the front bracket 11 after a certain angle of forward turning of the push rod 13, the seat rod 14 is driven to turn forward to close to the front bracket 11, as shown in fig. 9 and 10, until the front bracket 11, the rear bracket 12, the push rod 13 and the seat rod 14 are closely close together, and finally folded as shown in fig. 11 and 12. If the rotary joint 4 adopts the structure in embodiment 2, after the first locking mechanism is unlocked, one of the three components of the rear bracket 12, the push rod 13 and the seat post 14 is operated to be turned over to be close to the front bracket 11, that is, the other two components are also turned over to be close to the front bracket 11 by the linkage structure formed between the first joint seat 41, the second joint seat 42, the third joint seat 43 and the fourth joint seat 44, as shown in fig. 9 and 10, until the front bracket 11, the rear bracket 12, the push rod 13 and the seat post 14 are closely closed together, and finally folded as shown in fig. 11 and 12. The dimensions of the folded baby stroller in the width and height directions are greatly reduced, so that the folded baby stroller is small in size and convenient to carry and store. When the stroller is in the folded state, the handle 15 and the rotary joint 4 are both supported on the ground, so that the stroller is more convenient to store.

In the folding process of the baby carriage, after the push rod 13 is contracted, the first locking mechanism can be unlocked firstly, so that the side brackets 1 on two sides are overturned, folded and closed together, and then the second locking mechanism is unlocked, so that the side brackets 1 on two sides are transversely closed.

The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.

Claims

1. The utility model provides a children's shallow, includes has the shallow frame of expansion state and folding state, locates the front wheel subassembly of the bottom front portion of shallow frame, locates the rear wheel subassembly of the bottom rear portion of shallow frame, be used for with the locking mechanical system of shallow frame lock under the expansion state, the shallow frame is including being located respectively the side support of children's shallow left and right sides, locate both sides the stull subassembly between the side support, every side the side support all includes fore-stock, rear bracket, push rod and stock, its characterized in that: the front support, the rear support, the push rod and the seat rod are connected in a rotating way through the same shaft of a rotating shaft, the baby stroller further comprises a rotating joint arranged at the rotating joint of the front support, the rear support, the push rod and the seat rod, when the baby stroller is folded, the rear support, the push rod, the seat rod and the front support are overturned and are mutually closed, the rotating joint comprises a first joint seat fixedly connected with the front support, a second joint seat fixedly connected with the rear support, a third joint seat fixedly connected with the push rod and a fourth joint seat fixedly connected with the seat rod, the first joint seat, the second joint seat, the third joint seat and the fourth joint seat are sleeved on the rotating shaft and can be rotationally arranged around the rotating shaft, the locking mechanism comprises a first locking mechanism used for locking the side bracket at each side in an unfolding state, the first locking mechanism is arranged between any two parts of the first joint seat, the second joint seat, the third joint seat and the fourth joint seat, the rotating joint also comprises a first convex part arranged on one part of the first joint seat, the second joint seat, the third joint seat and the fourth joint seat, two parts of the other three parts except the one part are respectively provided with a first sliding groove and a second sliding groove matched with the first convex part, the first convex part is respectively arranged in the first sliding groove and the second sliding groove in a penetrating way, the third part of the other three parts except the one part is provided with a second convex part, and when the child stroller is in the unfolded state, the opposite ends of the first convex part are respectively matched with the first sliding groove and the second sliding groove, and the opposite ends of the second convex part are respectively matched with the third sliding groove and the fourth sliding groove.

2. The stroller of claim 1, wherein: the first protruding portion is arranged on the first joint seat, the first sliding groove is arranged on the second joint seat, the second sliding groove is arranged on the third joint seat, the second protruding portion is arranged on the fourth joint seat, the third sliding groove is arranged on the third joint seat, and the fourth sliding groove is arranged on the fourth joint seat.

3. The stroller of claim 2, wherein: the first sliding groove, the second sliding groove, the third sliding groove and the fourth sliding groove are arc grooves taking the axle center of the rotating shaft as the circle center, when the baby carriage starts to fold, the push rod and the rear support are turned forwards, and the seat rod and the front support can be turned forwards or backwards.

4. The stroller of claim 1, wherein: when one of the four parts of the first joint seat, the second joint seat, the third joint seat and the fourth joint seat rotates, the other three parts are driven to turn over.

5. The stroller of any one of claims 1-4, wherein: the transverse support assembly can stretch out and draw back along the left-right direction, and when the child stroller is folded, the transverse support assembly contracts to enable the side supports on the two sides to be close.

6. The stroller of claim 5, wherein: the transverse strut assembly comprises a first strut and a second strut which are respectively fixedly connected with the side brackets on two sides, the first strut and the second strut extend along the left-right direction, and the second strut can be slidably arranged on the first strut along the length extending direction of the first strut.

7. The stroller of claim 6, wherein: the first strut has a lumen extending along a length thereof, and the second strut is slidably disposed in the lumen along the length of the lumen.

8. The stroller of claim 5, wherein: the cross brace components are arranged in a plurality of groups, and are respectively arranged between the front brackets on the left side and the right side, between the rear brackets on the left side and the right side and between the push rods on the left side and the right side, and the structures of the cross brace components are the same or different.

9. The stroller of any one of claims 1-4, wherein: the push rod can stretch and retract along the length extension direction.

10. The stroller of claim 9, wherein: the push rod comprises a plurality of support rods which are sequentially connected along the length extension direction of the push rod, the lower part of the support rod which is positioned at the lowest part is connected with the rotary joint, and each support rod can be slidably arranged on the adjacent support rod along the length extension direction of the support rod adjacent to the support rod.