CN106627718B - Child cart - Google Patents

Abstract

The invention discloses a stroller for children, which comprises a stroller frame in unfolded and folded states. The stroller frame includes side brackets located on left and right sides, and cross brace assemblies arranged between the side brackets on both sides. The side brackets on the side all include a front bracket, a rear bracket, a push rod and a seat post. The rotating joint at the rotating joint of the bracket, the push rod, and the seat post, when the stroller is folded, the rear bracket, the push rod, the seat post and the front bracket turn over and move closer to each other. The baby stroller has a simple structure, can be folded, and has a small volume after being folded, and is easy to carry and store.

Description

stroller

technical field

The invention relates to the technical field of children's products, in particular to a baby stroller.

Background technique

The children's stroller in the prior art includes a stroller frame with an unfolded position and a folded position, a front wheel assembly and a rear wheel assembly arranged at the bottom of the stroller frame, and is used to lock the stroller frame in the unfolded state the locking mechanism. There are many types of existing children's strollers, the number of rods of the stroller frame is different, and the connection positions between the rods are different, so the folding principles and folding methods are different, and the folding effects are also different.

Contents of the invention

The object of the present invention is to provide a foldable children's stroller with a small volume after being folded to address the deficiencies of the prior art.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A stroller for children, comprising a stroller frame with unfolded state and folded state, a front wheel assembly arranged at the bottom front part of the pushcart frame, a rear wheel assembly arranged at the bottom rear part of the pushcart frame a wheel assembly, a locking mechanism for locking the stroller frame in an unfolded state, the stroller frame includes side brackets respectively located on the left and right sides of the children's stroller, and the a cross brace assembly between side brackets, said side brackets on each side comprising a front bracket, a rear bracket, a pushrod and a seatpost, said front bracket, said rear bracket, said pushrod, said seatpost four The parts are connected with the same axis through the rotating shaft, and the children's stroller also includes a rotating joint arranged at the rotation joints of the front bracket, the rear bracket, the push rod, and the seat post, and the children's pushchair When the bicycle is folded, the rear support, the push rod, the seatpost and the front support are overturned and close to each other.

Preferably, the rotating joint includes a first joint seat fixedly connected to the front support, a second joint seat fixedly connected to the rear support, a third joint seat fixedly connected to the push rod, The fourth joint seat fixedly connected with the seat post, the first joint seat, the second joint seat, the third joint seat and the fourth joint seat are all sleeved on the rotating shaft and It is arranged to be able to rotate around the rotating shaft, and the locking mechanism includes a first locking mechanism for locking the side brackets on each side in an unfolded state, and the first locking mechanism is arranged on the first joint seat, between any two of the four parts of the second joint seat, the third joint seat and the fourth joint seat.

Furthermore, the rotary joint also includes a first protrusion provided on one of the four parts of the first joint seat, the second joint seat, the third joint seat and the fourth joint seat. part, two of the remaining three parts except the one part are respectively provided with a first slide groove and a second slide groove matched with the first convex part, and the first convex part is respectively Going through the first chute and the second chute, the third part of the other three parts except the one part is provided with a second protrusion, and the other part except the one part Two of the remaining three components are also respectively provided with a third chute and a fourth chute matched with the second protrusion, and the first chute and the second chute are arc grooves with the same radius size and circle center, the third chute and the fourth chute are arc grooves with the same radius size and circle center, when the baby stroller is in the unfolded state, the first The opposite two ends of a protrusion are matched with the first chute and the second chute respectively, and the opposite ends of the second protrusion are respectively matched with the third chute and the fourth chute match.

A specific embodiment, the first protrusion is arranged on the first joint seat, the first slide groove is arranged on the second joint seat, and the second slide groove is arranged on the first joint seat. On the three-joint seat, the second convex part is arranged on the fourth joint seat, the third chute is arranged on the third joint seat, and the fourth chute is arranged on the fourth joint seat.

Further, the first chute, the second chute, the third chute and the fourth chute are circular arc grooves centered on the axis of the rotating shaft, when the child pushes When the bicycle starts to be folded, both the push rod and the rear bracket are turned forward, and the seat post and the front bracket can be turned forward or backward.

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.

Furthermore, the first joint seat is provided with a fifth slide slot extending along its radial direction, the second joint base is provided with a sixth slide slot extending along its rotation direction, and the third joint base The seat is provided with a seventh slide groove extending along its rotation direction, and the fourth joint seat is provided with an eighth slide groove extending along its rotation direction, and the rotation joint also includes a slider, which is respectively connected with The fifth chute, the sixth chute, the seventh chute and the eighth chute are matched, and one end of the slider is respectively set in the fifth chute and the eighth chute. In the sixth chute, the seventh chute and the eighth chute, when the stroller is folded, one of the three parts of the push rod, the seat post and the rear bracket When overturning and moving closer to the front bracket, the other two of the three components are driven to overturn with the sixth chute, the seventh chute and the eighth chute through the cooperation of the slider and the eighth chute. The front bracket is moved closer.

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

Preferably, the cross brace assembly can expand and contract in the left and right directions, and when the stroller is folded, the cross brace assembly shrinks to make the side brackets on both sides close together.

Further, the cross brace assembly includes a first brace and a second brace respectively fixedly connected to the side brackets on both sides, and both the first brace and the second brace extend along the left-right direction , the second strut is slidably arranged on the first strut along the extending direction of the length of the first strut.

Furthermore, the first strut has a lumen extending along its length, and the second strut can be slidably disposed in the lumen along the extending direction of the length of the lumen.

Further, there are multiple sets of cross brace assemblies, which are respectively arranged between the front brackets on the left and right sides, between the rear brackets on the left and right sides, and between the push rods on the left and right sides. The structures of the cross brace components are the same or different.

Preferably, the push rod can be stretched along its length extension direction.

Further, the push rod includes a plurality of rods sequentially connected along the length extension direction of the push rod, the lower part of the lowermost one of the rods is connected to the rotary joint, and each of the rods The rod is slidably arranged on the adjacent one of the supporting rods along the extending direction of the length of the adjacent one of the supporting rods.

Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art: the children's stroller of the present invention has a simple structure, can be folded, and has a small volume after folding, and is easy to carry and store.

Description of drawings

Accompanying drawing 1 is the perspective view of the children's stroller of the present invention in the unfolded state;

Accompanying drawing 2 is the side view of the children's stroller of the present invention in the unfolded state;

Accompanying drawing 3 is the structural representation of the rotary joint of the present invention (embodiment 1, enlarged view);

Accompanying drawing 4 is the exploded view of the rotary joint of the present invention (embodiment 1, enlarged view);

Accompanying drawing 5 is the structure diagram of the rotary joint of the present invention (embodiment 2, enlarged view);

Accompanying drawing 6 is the exploded view of the rotary joint of the present invention (embodiment 2, enlarged view);

Accompanying drawing 7 is one of perspective views of the children's stroller in the folding process of the present invention;

Accompanying drawing 8 is one of the side views of the children's stroller in the folding process of the present invention;

Accompanying drawing 9 is the second perspective view of the children's stroller in the folding process of the present invention;

Accompanying drawing 10 is the second side view of the children's stroller in the folding process of the present invention;

Accompanying drawing 11 is the perspective view of the children's stroller in the folded state of the present invention;

Accompanying drawing 12 is the side view of the stroller of the present invention in a folded state.

Among them: 1. Side bracket; 11. Front bracket; 12. Rear bracket; 13. Push rod; 14. Seat post; 15. Grip; 21. First cross brace; 22. Second cross brace; 23. Third Cross brace; 211/221/231, the first strut; 212/222/232, the second strut; 3, the rotating shaft; 4, the rotating joint; 41, the first joint seat; 411, the first convex part; 412, The fifth chute; 42, the second joint seat; 421, the first chute; 422, the fourth chute; 423, the sixth chute; 43, the third joint seat; 431, the second chute; 432, the first chute Three chutes; 433, the seventh chute; 44, the fourth joint seat; 441, the second protrusion; 442, the eighth chute; 45, the slider; 451, the ninth chute; 5, the front wheel assembly; 6. Rear wheel assembly.

Detailed ways

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Fig. 1, Fig. 2, Fig. 7 ~ Fig. 12, the children's stroller of the present invention includes a stroller frame in unfolded and folded states, a front wheel assembly 5 arranged at the bottom front of the stroller frame, a set The rear wheel assembly 6 at the bottom rear portion of the cart frame is used for locking the cart frame in the unfolded state.

The stroller frame includes side brackets 1 respectively located on the left and right sides of the stroller frame and cross brace assemblies connected between the side brackets 1 on the left and right sides.

The side bracket 1 on each side includes a front bracket 11, a rear bracket 12, a push rod 13 and a seatpost 14. The front bracket 11 extends along the front-to-back direction, and the rear bracket 12 is inclined downward from the front to the rear. The front wheel assembly 5 is installed on the front The front part of the bracket 11, the rear wheel assembly 6 is installed on the bottom of the rear bracket 12, the rear part of the front bracket 11, the top of the rear bracket 12, the bottom of the push rod 13 and the four parts of the seatpost 14 are connected by the same axis of rotation through the rotating shaft 3 .

The cross brace assembly extends along the left and right directions, and can expand and contract along the left and right directions, so that the side brackets 1 on the left and right sides can be moved closer together, so that the children's stroller can be folded in the transverse direction. There are multiple sets of brace assemblies. In this embodiment, the brace assemblies specifically include a first brace 21 arranged between the front brackets 11 on the left and right sides, and a second brace installed between the rear brackets 12 on the left and right sides. The structures of the brace 22, the third brace 23 disposed between the push rods 13 on the left and right sides, the first brace 21, the second brace 22 and the third brace 23 may be the same or different.

A specific implementation manner, taking the first brace 21 as an example, the first brace 21 includes a first brace 211 and a second brace 212, both of which extend along the left and right directions One end of the first brace 211 is fixedly connected to the side bracket 1 on one side, and one end of the second brace 212 is fixedly connected to the side bracket 1 on the other side, and the second brace 212 can move along the first brace. The rod 211 is slidably disposed on the first strut 211 in the extending direction of its length. Specifically, a lumen extending along the length direction of the first strut 211 is provided, and the second strut 212 is slidably disposed in the lumen along the extending direction of the length of the lumen. When the stroller frame is in the expanded state, the second strut 212 protrudes from the first strut 211 , and when the stroller frame is in the folded state, the second strut 212 retracts into the first strut 211 .

The second brace 22 also includes a first brace 221 and a second brace 222, and the third brace 23 also includes a first brace 231 and a second brace 232, which can be arranged in the same way as the first brace 21. , which will not be repeated here.

The push rod 13 can expand and contract along its length extension direction, so that not only the volume of the child's stroller is smaller after being folded, but also the child's stroller can be used by people of different heights. Specifically, the push rod 13 includes a plurality of struts arranged sequentially along its length extension direction, the lower part of a strut located at the bottom, the rear part of the front bracket 11, the upper part of the rear bracket 12 and the seatpost 14 four The parts are rotatably connected with the same axis through the rotating shaft 3, and each strut can be slidably arranged on the adjacent strut along the length extension direction of the adjacent strut.

In a specific embodiment, at least one of the two adjacent struts has a lumen extending along its length, and the other strut can be slidably set in the lumen along the length extension direction of the lumen .

In this embodiment, the push rod 13 includes three poles: the first pole 131, the second pole 132 and the third pole 133, and the first pole 131, the second pole 132 and the third pole 133 are in sequence set, and extend along the same length direction, the second pole 132 and the third pole 133 are provided with lumens extending along the length direction thereof, the first pole 131 can be in the lumen of the second pole 132 Set slidingly, the second strut 132 can be slidably set in the lumen of the third strut 133, the third strut 133 is located at the lowermost end of the push rod 13, the bottom of the third strut 133, the rear of the front bracket 11 The four parts of the upper portion, the rear bracket 12 and the seatpost 14 are connected by the same axis of rotation through the rotating shaft 3 .

The side bracket 1 on each side also includes a handle 15 whose end is fixedly connected to the upper end of the push rod 13 , and the handle 15 intersects with the push rod 13 to form an L shape. In this embodiment, one end of the handle 15 is fixedly connected to the upper part of the first pole 131 .

The stroller also includes a swivel joint 4 arranged at the connection between the front bracket 11, the rear bracket 12, the push rod 13 and the seat post 14 on each side. The swivel joint 4 can adopt the following two structural forms:

Example 1

As shown in FIGS. 3 and 4 , 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 , and a second joint seat 42 fixedly connected to the push rod 13 . The three-joint seat 43, the fourth joint seat 44 fixedly connected with the seatpost 14, 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 It can be arranged to be rotatable around the rotating shaft 3, and the rotating joint 4 also includes a first protrusion arranged on one of the four parts of the first joint seat 41, the second joint seat 42, the third joint seat 43 and the fourth joint seat 44. part 411, two of the remaining three parts except one part are respectively provided with a first chute 421 and a second chute 431 matching with the first protruding part 411, and the first protruding part 411 passes through Set in the first chute 421 and the second chute 431, the third part of the remaining three parts except one part is provided with a second convex part 441, and the remaining three parts except one part The two components in the middle are also respectively provided with a third chute 432 and a fourth chute 422 matched with the second protrusion 441, the first chute 421, the second chute 431, the third chute 432 and the second chute 432. The four chute 422 are arc grooves, and the center of the arc groove coincides with the center of the rotating shaft 3, the radius of the first chute 421 is the same as that of the second chute 431, and the radius of the third chute 432 and the fourth chute 422 are the same. same radius. When the stroller is in the unfolded state, the opposite ends of the first protrusion 411 are respectively against one end of the first chute 421 and one end of the second chute 431, and the opposite ends of the second protrusion 441 are respectively in contact with the third chute. One end of the sliding slot 432 is in contact with one end of the fourth sliding slot 422 .

In this embodiment, the first protrusion 411 is arranged on the first joint seat 41, the second protrusion 441 is arranged on the fourth joint seat 44, and the first slide groove 421 and the fourth slide groove 422 are arranged on the second joint seat 42 , the second sliding slot 431 and the third sliding slot 432 are arranged on the third joint seat 43 . Along the rotation direction of the rotating shaft 3, the opposite ends of the first protrusion 411 are respectively abutted against the rear end of the first chute 421 and the front end of the second chute 431, and the opposite ends of the second protrusion 441 are respectively abutted against It is provided at the rear end of the fourth sliding slot 422 and the front end of the third sliding slot 432 . In this way, when the stroller starts to be folded, the push rod 13 and the rear frame 12 can only be turned forward, while the front frame 11 and the seatpost 14 can be turned forward or backward.

The locking mechanism includes a first locking mechanism for locking the side bracket 1 on each side in the unfolded state. When the above-mentioned structure is adopted for the rotary joint 4, the first locking mechanism only needs to lock the first joint seat 41 and the second joint seat 41. 42. The position of two of the four parts of the third joint seat 43 and the fourth joint seat 44 means that the positions of the other two parts are also in a locked state. When the first locking mechanism is unlocked, the first joint The four parts of the 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 the second joint seat 42 and the third joint seat 43 rotate a certain angle and continue to rotate. When rotating, the first joint seat 41 and the fourth joint seat 44 can be driven to rotate, thereby driving the push rod 13, the rear support 12 and the seat post 14 to rotate and move closer to the front support 11, so that the stroller can be folded.

Example 2

In this embodiment, when one of the four parts 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 parts can be driven to flip and fold, which can realize Flip linkage.

Specifically, as shown in FIGS. 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 , and a second joint seat 42 fixed to the push rod 13 . The connected third joint seat 43, the fourth joint seat 44 fixedly connected with the seat post 14, 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 arranged to rotate around the rotating shaft 3. The first joint seat 41 is provided with a fifth chute 412 extending along its radial direction, the second joint seat 42 is provided with a sixth chute 423 extending along its rotation direction, and the third joint seat 43 is provided with a The seventh slide slot 433 extends in the rotation direction, and the fourth joint base 44 is provided with the eighth slide slot 442 extending in the rotation direction. The rotary joint 4 also includes a slider 45, 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 installed on the The fifth chute 412 , the sixth chute 423 , the seventh chute 433 and the eighth chute 442 are arranged to slide along the length extension direction of each chute, and at the same time, the slider 45 can rotate and slide relative to the rotating shaft 3 Specifically, the slider 45 is provided with a ninth chute 451 matched with the rotating shaft 3 , and the rotating shaft 3 passes through the ninth chute 451 . The sixth chute 423, the seventh chute 433 and the eighth chute 442 have different structural dimensions. In this embodiment, the fifth chute 412 is a straight groove, and the sixth chute 423, the seventh chute 433 and The eighth sliding grooves 442 are all involute arc grooves, but the parameters for forming the involute arc grooves are different. In this way, a linkage structure is formed between the first joint seat 41, the second joint seat 42, the third joint seat 43 and the fourth joint seat 44. When the stroller is folded, the push rod 13, the seat post 14 and the rear When one of the three parts of the bracket 12 turns over and draws closer to the front bracket 11, the cooperation of the slider 45 with the sixth chute 423, the seventh chute 433 and the eighth chute 442 can drive the other of the three parts. The two parts also turn over and move closer to the front support 11.

Likewise, in this embodiment, as long as the first locking mechanism for locking the side bracket 1 in the unfolded state is used to lock the first joint seat 41, the second joint seat 42, the third joint seat 43 and the fourth joint seat 444 If the positions of two parts in one part are locked, the positions of the other two parts are also locked.

In the above two embodiments, along the axial extension direction 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 all from the child's pushchair. The inner side of the car is sequentially arranged to the outside, and the first locking mechanism is arranged between the second joint seat 42 and the third joint seat 43 to lock the positions of the two, when the second joint seat 42 and the third joint seat 43 When the position of the joint is fixed, the positions of the first joint seat 41 and the fourth joint seat 44 are also fixed through the specific structural setting of the rotating joint.

The locking mechanism also includes a second locking mechanism for locking the strut assembly in the unfolded state and a third locking mechanism for locking the push rod 13 in different length positions. The second locking mechanism is respectively arranged between the first struts 211/221/231 and the second struts 212/222/232 of each set of cross brace assemblies. The third locking mechanism is respectively arranged between every two adjacent poles of the push rod 13 .

When the stroller is in the unfolded state, the first locking mechanism, the second locking mechanism, and the third locking mechanism are all in the locked state, and the second strut 212/222/232 extends from the first strut 211/221/231 The first strut 131 protrudes from the lumen on the second strut 132 , and the second strut 132 protrudes from the lumen on the third strut 133 , as shown in FIGS. 1 and 2 .

When the stroller is folded, the third locking mechanism is unlocked first, so that the first pole 131 is retracted into the lumen on the second pole 132, and the second pole 132 is retracted into the lumen on the third pole 133 , as shown in Figure 7 and Figure 8; then unlock the second locking mechanism, so that the second strut 212/222/232 retracts into the lumen on the first strut 211/221/231, so that the left and right sides The side brackets 1 move closer together along the left and right directions; finally unlock the first locking mechanism, if the swivel joint 4 adopts the structure in embodiment 1, after the first locking mechanism is unlocked, respectively operate the rear bracket 12 and the push rod 13 to make them revolve around the rotation axis 3 Flip forward and gradually move closer to the front bracket 11. When the push rod 13 flips forward at a certain angle, when the push rod 13 continues to flip forward and get closer to the front bracket 11, the seat post 14 is also turned forward to move closer to the front bracket 11. As shown in FIG. 9 and FIG. 10 , until the front bracket 11 , rear bracket 12 , push rod 13 and seat post 14 are close together, the final folding is shown in FIG. 11 and FIG. 12 . If the swivel joint 4 adopts the structure in Embodiment 2, after the first locking mechanism is unlocked, one of the three parts of the rear bracket 12, the push rod 13 and the seat post 14 is operated to turn over and move closer to the front bracket 11. Through 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, the other two components also turn over and move closer to the front bracket 11, as shown in Figures 9 and 10 As shown, until the front bracket 11, the rear bracket 12, the push rod 13 and the seatpost 14 are close together, and finally folded as shown in Fig. 11 and Fig. 12 . The size of the folded baby stroller in the width and height directions is greatly reduced, so that the folded baby stroller has a small volume and is easy to carry and store. When the baby stroller is in the folded state, both the handle 15 and the rotating joint 4 are supported on the ground, so that the storage of the baby stroller is more convenient.

During the folding process of the stroller, after the push rod 13 shrinks, the first locking mechanism can also be unlocked first, so that the side brackets 1 on both sides can be turned over and folded together, and then the second locking mechanism can be unlocked, so that the side brackets 1 on both sides can be folded together. 1 Close up horizontally.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and not to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention shall fall within the protection scope of the present invention.

Claims (10)

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.