Baby stroller
By designing a sliding push rod assembly and linkage mechanism, the stroller can be folded into a compact box structure, solving the problem of the difficulty of carrying existing strollers and achieving the effect of effortless dragging.
Patent Information
- Application Number
- CN202421228782.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-05-31
AI Technical Summary
Existing strollers are difficult to carry when folded, especially larger and heavier ones.
A children's stroller was designed, whose frame includes a front support, a rear support, and a push rod assembly. The push rod assembly can be slidably connected and can be used as a handle when folded. The seat mechanism and backrest can be closed together. The components are tightly packed together through a linkage mechanism to form a compact box structure.
This stroller allows for easy folding and dragging, saving effort and featuring a compact, small, and convenient design.
Smart Images
Figure CN223720960U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to children's articles technical field, concretely relates to a children's cart. BACKGROUND
[0002] Children's cart is generally used when adults carry children to go out. In order to facilitate the carrying and storage of children's cart, most of children's cart can be folded. In the prior art, when the children's cart is folded, it is generally carried by lifting the whole children's cart, which makes the carrying of children's cart more laborious, especially some children's cart with large structure and heavy weight. SUMMARY
[0003] The utility model aims at the deficiency in the prior art, and provides a children's cart convenient to carry.
[0004] To achieve the above object, the utility model adopts the technical scheme of:
[0005] A children's cart, including the pushcart frame with unfolded state and folded state, the pushcart frame includes front support, rear support and push rod assembly, the upper portion of the front support is rotatably connected with the upper portion of the rear support, the lower portion of the push rod assembly is slidably connected with the upper portion of the front support, the children's cart further includes seat mechanism, the seat mechanism includes base assembly movably arranged on the pushcart frame and backrest rotatably connected with the base assembly.
[0006] When the children's cart is in the folded state, along the front and back direction, the front support, the push rod assembly and the base assembly are accommodated between the backrest and the rear support, the push rod assembly includes a plurality of push rod struts sequentially slidably connected along the length extension direction thereof, the push rod struts are relatively slidable to make the push rod assembly elongate, and the push rod assembly is relatively slidable away from the front support.
[0007] In some embodiments, the children's cart further includes a front wheel assembly arranged at the lower portion of the front support and a rear wheel assembly arranged at the lower portion of the rear support, when the children's cart is in the folded state, the lowermost end of the rear wheel assembly is located above the lowermost end of the front wheel assembly, and the lower portion of the push rod assembly extends to the lower portion of the front support to make the push rod assembly and the front wheel assembly stand on the ground together.
[0008] In some embodiments, the children's cart further includes a linkage mechanism arranged between the base assembly and the rear support, the linkage mechanism is movably connected with the rear support and the base assembly respectively, when the children's cart is in the folded state, the rear support and the front support are kept close to each other by the linkage mechanism.
[0009] In some embodiments, the rear portion of the base assembly is rotatably connected to the upper portion of the front support, and the linkage mechanism includes a first link, one end of the first link is rotatably connected to the front portion of the base assembly, and the other end of the first link is rotatably connected to the upper portion of the rear support.
[0010] In some embodiments, the front support is rotatably connected to the rear support about a first axis, the base assembly is rotatably connected to the front support about a second axis, the first link is rotatably connected to the base assembly about a third axis, and the first link is rotatably connected to the rear support about a fourth axis, and the distance between the first axis and the fourth axis is less than the distance between the third axis and the fourth axis.
[0011] In some embodiments, the front support is rotatably connected to the rear support about a first axis, and a portion of the rear support extends upward beyond the other side of the first axis to form a rear support extension, and the first link is rotatably connected to the rear support extension.
[0012] In some embodiments, the front support extends upward to form a front support extension, and the rear portion of the base assembly is rotatably connected to the front support extension.
[0013] In some embodiments, the base assembly includes a base and a seat rotatably disposed on the base about a rotation axis extending in the up-down direction, the backrest is rotatably connected to the seat, the rear portion of the base is rotatably connected to the upper portion of the front support, and one end of the first link is rotatably connected to the front portion of the base.
[0014] In some embodiments, the base assembly includes a seat, the backrest is rotatably connected to the seat, the rear portion of the seat is rotatably connected to the upper portion of the front support, and one end of the first link is rotatably connected to the front portion of the seat.
[0015] In some embodiments, the backrest includes a backrest main plate, the rear support includes rear support rods disposed on the left and right sides and a connecting plate connected between the rear support rods on the left and right sides, and when the stroller is in the folded state, the front support, the push rod assembly and the base assembly are accommodated between the backrest main plate and the connecting plate in the front-back direction.
[0016] In some embodiments, the backrest further includes backrest side plates respectively disposed on the left and right sides of the backrest main plate, and when the stroller is in the unfolded state, the backrest side plates extend forward from the left and right sides of the backrest main plate.
[0017] The rear support further includes a surrounding plate disposed on the connecting plate, the surrounding plate is disposed at the front portion of the connecting plate, and the rear support rods are accommodated inside the surrounding plate.
[0018] When the stroller is in the folded state, the backrest side plates are close to the surrounding plates, the base assembly is accommodated between the left and right backrest side plates in the left-right direction, and the front support, the push rod assembly and the rear support are accommodated between the left and right sides of the surrounding plate;
[0019] And / or, the surrounding plate is provided with a avoiding slot, when the stroller is in the folded state, the push rod assembly is located in the avoiding slot;
[0020] And / or, the backrest main plate and the backrest side plate are integrally arranged, and the connecting plate and the surrounding plate are integrally arranged.
[0021] In some embodiments, the seat mechanism further comprises an armrest and a second connecting rod, one end of the armrest is rotationally connected with the backrest, one end of the second connecting rod is rotationally connected with the armrest, and the other end of the second connecting rod is rotationally connected with the base assembly.
[0022] In some embodiments, the front support comprises a front support rod and a connecting piece fixedly arranged on the upper portion of the front support rod, the rear support comprises rear support rods arranged on the left and right sides respectively, the upper portions of the rear support rods on each side are rotationally connected with the corresponding side of the connecting piece respectively, and the lower portion of the push rod assembly is slidingly connected with the upper portion of the front support rod.
[0023] And / or, the push rod assembly comprises an upper push rod and a lower push rod, the lower portion of the upper push rod is slidingly connected with the upper portion of the lower push rod, the lower portion of the lower push rod is slidingly connected with the upper portion of the front support rod, and the front support rod, the lower push rod and the upper push rod are all arc-shaped.
[0024] And / or, the front support rod and the lower push rod each have a lumen extending along the length direction thereof, the lower push rod is slidingly arranged in the lumen of the front support rod along the length extension direction of the lumen of the front support rod, and the upper push rod is slidingly arranged in the lumen of the lower push rod along the length extension direction of the lumen of the lower push rod.
[0025] And / or, the push rod assembly further comprises a push handle extending in the left-right direction, and the upper portion of the upper push rod is fixedly arranged on the middle portion of the push handle.
[0026] Thanks to the above technical solutions, the stroller of the present application has the following advantages compared with the prior art: after being folded, the backrest, the seat, the front support, the push rod assembly and the rear support of the stroller of the present application are closely close together, the seat, the front support and the push rod assembly are accommodated between the backrest and the rear support, the push rod assembly can slide away from the front support relative to the front support, the push rod assembly can be elongated, the push rod assembly can serve as a handle, and the whole stroller is like a luggage case, which can be dragged by a person, so that the stroller is convenient to carry and very labor-saving. Attached Figure Description
[0027] Appendix Figure 1 This is a three-dimensional schematic diagram of the stroller in the unfolded state of Embodiment 1 (the stroller is in the forward-facing use state);
[0028] Appendix Figure 2 This is a side view of the stroller in the unfolded state of Embodiment 1 (the stroller is in the forward-facing use state);
[0029] Appendix Figure 3 This is a three-dimensional schematic diagram of the stroller in the unfolded state of Embodiment 1 (the stroller is in the reverse use state);
[0030] Appendix Figure 4 This is a side view of the stroller in the unfolded state of Embodiment 1 (the stroller is in the reverse use state);
[0031] Appendix Figure 5 This is an exploded view of the stroller in Embodiment 1.
[0032] Appendix Figure 6 This is a three-dimensional schematic diagram of the stroller in this embodiment 1 during the folding process (the backrest rotates forward relative to the seat to the folding position, the lower push rod slides down a certain distance relative to the front support rod, and the upper push rod slides down a certain distance relative to the lower push rod).
[0033] Appendix Figure 7 For the corresponding appendix Figure 6 A side view diagram in this state;
[0034] Appendix Figure 8 This is a three-dimensional schematic diagram of the stroller in this embodiment 1 during the folding process (the lower push rod slides down relative to the front support rod to the folding position, and the upper push rod slides down relative to the lower push rod to the folding position).
[0035] Appendix Figure 9 For the corresponding appendix Figure 8 A side view diagram in this state;
[0036] Appendix Figure 10 This is a three-dimensional schematic diagram of the stroller in Embodiment 1 during the folding process (the rear support rotates forward at a certain angle);
[0037] Appendix Figure 11 For the corresponding appendix Figure 8 A side view diagram in this state;
[0038] Appendix Figure 12 This is a three-dimensional schematic diagram of the stroller in the folded state of Embodiment 1.
[0039] Appendix Figure 13Fig. 2 is a perspective view of the child stroller of embodiment 1 in the folded state;
[0040] Fig. 3 is a side view of the child stroller of embodiment 1 in the folded state; Figure 14 Fig. 4 is a perspective view of the child stroller of embodiment 1 in the transition from the folded state to the towing state;
[0041] Fig. 5 is a side view of the child stroller of embodiment 1 in the transition from the folded state to the towing state; Figure 15 Fig. 6 is a perspective view of the child stroller of embodiment 1 in the towing state;
[0042] Figure 16 Fig. 7 is a side view of the child stroller of embodiment 1 in the towing state;
[0043] Fig. 8 is a side view of the child stroller of embodiment 2 in the unfolded state (the child stroller is in the forward use state). Figure 17 Fig. 9 is a perspective view of the child stroller of embodiment 2 in the unfolded state (the child stroller is in the forward use state).
[0044] Fig. 10 is a side view of the child stroller of embodiment 2 in the unfolded state (the child stroller is in the forward use state). Figure 18 Fig. 11 is a side view of the child stroller of embodiment 2 in the unfolded state (the child stroller is in the backward use state). Fig. 12 is a perspective view of the child stroller of embodiment 2 in the unfolded state (the child stroller is in the backward use state).
[0045] Fig. 13 is a perspective view of the child stroller of embodiment 2 in the unfolded state (the child stroller is in the backward use state). Fig. 14 is a perspective view of the child stroller of embodiment 2 in the unfolded state (the child stroller is in the backward use state). Fig. 15 is a perspective view of the child stroller of embodiment 2 in the unfolded state (the child stroller is in the backward use state).
[0046] Fig. 16 is a perspective view of the child stroller of embodiment 2 in the unfolded state (the child stroller is in the backward use state). Fig. 17 is a perspective view of the child stroller of embodiment 2 in the unfolded state (the child stroller is in the backward use state).
[0047] Fig. 18 is a perspective view of the child stroller of embodiment 2 in the unfolded state (the child stroller is in the backward use state). Figure 2 Fig. 19 is a perspective view of the child stroller of embodiment 2 in the unfolded state (the child stroller is in the backward use state). Fig. 20 is a perspective view of the child stroller of embodiment 2 in the unfolded state (the child stroller is in the backward use state).
[0048] Fig. 21 is a perspective view of the child stroller of embodiment 2 in the unfolded state (the child stroller is in the backward use state). Fig. 22 is a perspective view of the child stroller of embodiment 2 in the unfolded state (the child stroller is in the backward use state).
[0049] Fig. 23 is a perspective view of the child stroller of embodiment 2 in the unfolded state (the child stroller is in the backward use state). Figures 1-17As shown, the child stroller of the present application comprises a stroller frame, a seat mechanism arranged on the stroller frame, a front wheel assembly 51 arranged at the bottom front part of the stroller frame, and a rear wheel assembly 52 arranged at the bottom rear part of the stroller frame.
[0050] The stroller frame comprises a front support 11, a rear support 12, and a push rod assembly 13. The front wheel assembly 51 is arranged at the lower part of the front support 11, and the rear wheel assembly 52 is arranged at the lower part of the rear support 12. The upper part of the rear support 12 is rotationally connected with the upper part of the front support 11 about a first shaft 41. The lower part of the push rod assembly 13 is slidingly connected with the upper part of the front support 11, so that the push rod assembly 13 can be slidingly arranged relative to the front support 11 along the length extension direction of the front support 11.
[0051] In this embodiment, the front support 11 comprises a front support rod 111 and a connecting piece 112. The front support rod 111 is located at the middle part in the left-right direction of the child stroller, and extends upward from front to back when the stroller frame is in the unfolded state. The front wheel assembly 51 is arranged at the lower part of the front support rod 111 on the left and right sides, respectively. The connecting piece 112 is fixedly arranged at the upper part of the front support rod 111.
[0052] The rear support 12 comprises a rear support rod 121 arranged on each of the left and right sides. The upper part of each of the rear support rods 121 is rotationally connected with the corresponding side part of the connecting piece 112 through the first shaft 41. The rear wheel assembly 52 is arranged at the lower part of each of the rear support rods 121.
[0053] The rear support 12 further comprises a connecting plate 122 arranged between the left and right rear support rods 121. The rear support 12 further comprises a surrounding plate 123 arranged on the connecting plate 122, and the surrounding plate 123 is arranged at the front part of the connecting plate 122. The connecting plate 122 and the surrounding plate 123 form a box-shaped structure with the front part and the bottom part being open. The left and right rear support rods 121 are accommodated in the box-shaped structure. Preferably, the connecting plate 122 and the surrounding plate 123 are integrally arranged.
[0054] Preferably, the front support rod 111 has a lumen extending along the length direction thereof, and the push rod assembly 13 is slidingly arranged in the lumen of the front support rod 111 along the length extension direction of the lumen. The upper and lower ends of the lumen of the front support rod 111 are open, so that the upper part of the push rod assembly 13 extends to the outside of the upper part of the lumen, and the lower part of the push rod assembly 13 can be retracted into the lumen or extend to the outside of the lower part of the lumen.
[0055] The push rod assembly 13 comprises a plurality of push rod rods which are sequentially slidingly connected along the length extension direction thereof. The push rod rods are relatively slidable to elongate or shorten the push rod assembly 13.
[0056] Specifically, the push rod assembly 13 comprises an upper push rod 131 and a lower push rod 132. The lower part of the upper push rod 131 is in sliding connection with the upper part of the lower push rod 132, and the lower part of the lower push rod 132 is in sliding connection with the upper part of the front support rod 111. Preferably, the upper push rod 131, the lower push rod 132 and the front support rod 111 are all arc-shaped structures, and when the child stroller is in the unfolded state, the arc-shaped structures of the upper push rod 131, the lower push rod 132 and the front support rod 111 are sequentially arranged, so that the child stroller has an attractive appearance.
[0057] The lower push rod 132 has a lumen extending along the length direction thereof, and the upper push rod 131 is slidably arranged in the lumen of the lower push rod 132 along the length direction of the lumen. The lower push rod 132 is slidably arranged in the lumen of the front support rod 111 along the length direction of the lumen, and the lower part of the lower push rod 132 can extend out of the lumen of the front support rod 111 to the outside of the lumen.
[0058] The push rod assembly 13 further comprises a push handle 133 extending in the left-right direction, and the upper end of the upper push rod 131 is fixedly arranged at the middle part of the push handle 133.
[0059] The seat mechanism is for a child to sit on, and comprises a base assembly and a backrest 23. The base assembly is movably arranged on the stroller frame, and the backrest 23 is rotatably connected to the base assembly. Thus, when the child stroller is folded, the backrest 23 can be rotated relative to the base assembly to be close to the base assembly, and the seat mechanism as a whole can be rotated relative to the stroller frame to be close to the stroller frame, so that the seat mechanism can be more closely close to the stroller frame after the child stroller is folded, and the structure of the child stroller after being folded has a smaller volume.
[0060] The base assembly at least comprises a seat 21 for supporting the child's buttocks, and the seat 21 is rotatably connected to the backrest 23. In some embodiments, the base assembly further comprises a base 22, and the base 22 is rotatably connected to the upper part of the front support 11. The seat 21 can be rotatably arranged on the base 22 about a rotation shaft extending in the up-down direction. In this way, the seat 21 can drive the backrest 23 to rotate about the rotation shaft, so that the seat 21 and the backrest 23 can be rotated to different positions, and the child stroller can have a forward use state and a reverse use state. When the child stroller is in the forward use state, the child's face is forward when the child is sitting in the seat mechanism, as shown in Figure 1 and Figure 2 When the child stroller is in the reverse use state, the child's face is backward when the child is sitting in the seat mechanism, as shown in Figure 3 and Figure 4 The seat 21 can be rotated relative to the base 22 about the rotation shaft to switch the child stroller between the forward use state and the reverse use state without taking the child out of the seat mechanism, so that the reversing operation of the child stroller is convenient.
[0061] The backrest 23 comprises a backrest main plate 231 for supporting the back of the child. The backrest 23 further comprises backrest side plates 232 respectively arranged at left and right sides of the backrest main plate 231 for protecting the child. When the stroller is in the unfolded state, the backrest side plates 232 extend forward from the left and right sides of the backrest main plate 231, and the lower portions of each of the backrest side plates 232 are respectively pivotally connected to the corresponding side of the seat 21. Preferably, the backrest main plate 231 and the left and right backrest side plates 232 are integrally arranged.
[0062] The seat mechanism further comprises an armrest 24 and a second connecting rod 25. One end of the armrest 24 is pivotally connected to the backrest 23. One end of the second connecting rod 25 is pivotally connected to the armrest 24, and the other end of the second connecting rod 25 is pivotally connected to the seat 21.
[0063] In this way, a four-bar linkage mechanism is formed between the seat 21, the backrest 23, the armrest 24 and the second connecting rod 25. When the backrest 23 is pivoted relative to the seat 21 during folding and unfolding of the stroller, the armrest 24 and the second connecting rod 25 are synchronously folded or unfolded by relative pivoting, so that the folding operation of the stroller is facilitated.
[0064] The stroller further comprises a linkage mechanism arranged between the base assembly and the rear support 12, and the linkage mechanism is movably connected to the rear support 12 and the base assembly respectively. When the rear support 12 is moved towards the front support 11 for folding, the rear support 12 drives the base assembly to move towards the front support 11 through the linkage mechanism. When the rear support 12 is pivoted towards the unfolded position, the rear support 12 drives the base assembly to move towards the unfolded position through the linkage mechanism. In this way, during the unfolding or folding operation of the stroller, the base assembly can be pivoted relative to the front support 11 through the pivoting of the rear support 12, without the need for separate operation to pivot the base assembly relative to the front support 11, so that the folding and unfolding operation of the stroller is facilitated.
[0065] Specifically, the linkage mechanism comprises a first connecting rod 3. The rear portion of the base 22 is pivotally connected to the upper portion of the front support 11 about a second axis 42. One end of the first connecting rod 3 is pivotally connected to the front portion of the base 22 about a third axis 43, and the other end of the first connecting rod 3 is pivotally connected to the upper portion of the rear support 12 about a fourth axis 44. In this way, a four-bar linkage mechanism is formed between the front support 11, the base 22, the first connecting rod 3 and the rear support 12, so that when the rear support 12 is pivoted relative to the front support 11, the base 22 can be synchronously pivoted relative to the front support 11.
[0066] In this embodiment, part of the rear support rod 121 extends upwardly to the other side of the first shaft 41 to form a rear support extension 121a, and the first link rod 3 is pivotally connected to the rear support extension 121a. The connecting member 112 extends upwardly to form a front support extension 113, and the base 22 is pivotally connected to the front support extension 113.
[0067] The distance between the first shaft 41 and the fourth shaft 44 is smaller than the distance between the third shaft 43 and the fourth shaft 44. In this way, the base assembly can be closer to the front support 11 when the stroller is folded, and the stroller structure is more compact and smaller in size when folded.
[0068] When the stroller is in the unfolded state, the upper push rod 131 extends out of the lumen of the lower push rod 132 from the upper end of the lumen of the lower push rod 132, the lower push rod 132 extends out of the lumen of the front support rod 111 from the upper end of the lumen of the front support rod 111, the lower part of the lower push rod 132 is located in the lumen of the front support rod 111 and does not extend out of the lumen, as shown in Figures 1-4 . The stroller can be in a forward use state, as shown in Figure 1 and Figure 2 . It can also be in a reverse use state, as shown in Figure 3 and Figure 4 .
[0069] When the stroller is folded, the backrest 23 is pivoted forward to approach the seat 21, the upper push rod 131 is slid downwardly to retract into the lumen of the lower push rod 132, and the push rod assembly 13 is slid downwardly as a whole to retract into the lumen of the front support rod 111, as shown in Figure 6 and Figure 7 . Until the upper push rod 131 is mostly retracted into the lumen of the lower push rod 132 to be in a folded position, and the upper part of the push rod assembly 13 is mostly retracted into the lumen of the front support rod 111 to be in a folded position, as shown in Figure 8 and Figure 9 . The rear support 12 is pivoted forward to gradually approach the front support 11, and the base assembly is pulled downwardly by the first link rod 3 to gradually approach the front support 11, as shown in Figure 10 and Figure 11 .
[0070] When the stroller is in the folded state, the rods constituting the stroller frame are closely together, the seat mechanism is closely together with the stroller frame. The lower part of the lower push rod 132 extends downward to the outside of the lumen of the front support rod 111, the lowermost end of the front wheel assembly 51 is below the lowermost end of the rear wheel assembly 52, the lower part of the lower push rod 132 and the left and right front wheel assemblies 51 are collectively supported on the ground, and the left and right front wheel assemblies 51 and the lower part of the lower push rod 132 are sequentially connected to form a triangular structure, so that the stroller after folding has good stability and can stand on the ground without being easily tilted. As shown in Figure 12 and Figure 13 When the stroller is in the folded state, the seat mechanism will not rotate away from the front support 11 under its own gravity, and the rear support 12 will not rotate away from the front support 11 through the linkage mechanism.
[0071] When the stroller is in the folded state, the backrest side plate 232 is close to the surrounding plate 123; in the front-rear direction, the front support 11, the push rod assembly 13, the handrail 24 and the base assembly are accommodated between the backrest main plate 231 and the connecting plate 122; in the left-right direction, the handrail 24 and the base assembly are accommodated between the left and right backrest side plates 232, and the front support 11, the push rod assembly 13 and the rear support rod 121 are all accommodated between the left and right sides of the surrounding plate 123. The entire stroller forms a box structure, making the stroller structure compact and small. The top plate of the surrounding plate 123 is provided with a avoiding slot 123a, and the push rod assembly 13 is partially located in the avoiding slot 123a, so that the push handle 133 is located outside the box structure, as shown in Figure 12 and Figure 13 .
[0072] When the stroller is in the folded state, the push rod assembly 13 can be elongated and extended from the lumen of the front support rod 111, that is, the push rod assembly 13 is in the unfolded position, as shown in Figures 14-17 At this time, the stroller is similar to a luggage, and the push rod assembly 13 can be used as a handle for dragging, making the carrying of the stroller very convenient and labor-saving.
[0073] Example 2
[0074] In this embodiment, as shown in Figure 18 , the stroller has no linkage mechanism, and the rest is the same as example 1.
[0075] Example 3
[0076] In this embodiment, the base assembly of the child's pushchair does not include a base, the rear of the seat 21 is pivotally connected to the upper part of the front support 11 about a second axis 42. One end of the first link 3 is pivotally connected to the front of the seat 21 about a third axis 43, the other end of the first link 3 is pivotally connected to the upper part of the rear support 12 about a third axis 44. In this way, a four-bar linkage is formed between the front support 11, the seat 21, the first link 3 and the rear support 12, which allows the seat 21 to be synchronously rotated relative to the front support 11 when the rear support 12 is rotated relative to the front support 11. The remainder is the same as embodiment 1.
[0077] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made in accordance with the spirit and essence of the present application shall be covered within the protection scope of the present application.
Claims
1. A stroller, characterized by: The stroller frame comprises a front support, a rear support and a push rod assembly, the upper part of the front support is rotatably connected with the upper part of the rear support, the lower part of the push rod assembly is slidably connected with the upper part of the front support, the stroller further comprises a seat mechanism, the seat mechanism comprises a base assembly movably arranged on the stroller frame and a backrest rotatably connected with the base assembly; When the stroller is in the folded state, the front support, the push rod assembly and the base assembly are accommodated between the backrest and the rear support in the front-rear direction, the push rod assembly comprises a plurality of push rod struts sequentially slidably connected along the length direction of the push rod assembly, the push rod struts are relatively slidable to elongate the push rod assembly, and the push rod assembly is relatively slidable away from the front support.
2. The stroller of claim 1, wherein: The stroller further comprises a front wheel assembly arranged on the lower part of the front support and a rear wheel assembly arranged on the lower part of the rear support, when the stroller is in the folded state, the lowermost end of the rear wheel assembly is located above the lowermost end of the front wheel assembly, and the lower part of the push rod assembly extends to the lower part of the front support so that the push rod assembly and the front wheel assembly are jointly supported on the ground.
3. The stroller of claim 1, wherein: The stroller further comprises a linkage mechanism arranged between the base assembly and the rear support, the linkage mechanism is movably connected with the rear support and the base assembly respectively, and the linkage mechanism keeps the rear support and the front support close to each other when the stroller is in the folded state.
4. The stroller of claim 3, wherein: The rear part of the base assembly is rotatably connected with the upper part of the front support, and the linkage mechanism comprises a first connecting rod, one end of the first connecting rod is rotatably connected with the front part of the base assembly, and the other end of the first connecting rod is rotatably connected with the upper part of the rear support.
5. The stroller of claim 4, wherein: The front support and the rear support are rotatably connected around a first axis, the base assembly and the front support are rotatably connected around a second axis, the first connecting rod and the base assembly are rotatably connected around a third axis, the first connecting rod and the rear support are rotatably connected around a fourth axis, and the distance between the first axis and the fourth axis is smaller than the distance between the third axis and the fourth axis.
6. The stroller of claim 4, wherein: The front support and the rear support are rotatably connected around a first axis, part of the rear support extends upward to the other side of the first axis to form a rear support extension, and the first connecting rod is rotatably connected on the rear support extension. The front support extends upward to form a front support extension, and the rear part of the base assembly is rotatably connected on the front support extension.
7. The stroller of claim 4, wherein: The base assembly comprises a base and a seat rotatably arranged on the base around a rotating shaft extending in the up-down direction, the backrest is rotatably connected with the seat, the rear part of the base is rotatably connected with the upper part of the front support, and one end of the first connecting rod is rotatably connected with the front part of the base. Alternatively, the base assembly comprises a seat, the backrest is rotatably connected with the seat, the rear part of the seat is rotatably connected with the upper part of the front support, and one end of the first connecting rod is rotatably connected with the front part of the seat.
8. The stroller of claim 1, wherein: The backrest comprises a backrest main plate, the rear support comprises rear support rods arranged on left and right sides and a connecting plate connected between the rear support rods on the left and right sides, and when the stroller is in the folded state, the front support, the push rod assembly and the base assembly are accommodated between the backrest main plate and the connecting plate in the front-rear direction.
9. The stroller of claim 8, wherein: The backrest further comprises backrest side plates arranged on left and right sides of the backrest main plate respectively, and when the stroller is in the unfolded state, the backrest side plates extend forward from the left and right sides of the backrest main plate respectively; The rear support further comprises a surrounding plate arranged on the connecting plate, the surrounding plate is arranged at the front of the connecting plate, and the rear support rods are accommodated inside the surrounding plate; When the stroller is in the folded state, the backrest side plates are close to the surrounding plate, the base assembly is accommodated between the backrest side plates on the left and right sides in the left-right direction, and the front support, the push rod assembly and the rear support rods are all accommodated between the left and right sides of the surrounding plate; And / or, the surrounding plate is provided with a avoiding slot, and when the stroller is in the folded state, the push rod assembly is located in the avoiding slot; And / or, the backrest main plate and the backrest side plate are integrally arranged, and the connecting plate and the surrounding plate are integrally arranged.
10. The stroller of claim 1, wherein: The seat mechanism further comprises a handrail and a second connecting rod, one end of the handrail is rotationally connected with the backrest, and one end of the second connecting rod is rotationally connected with the handrail, and the other end of the second connecting rod is rotationally connected with the base assembly.
11. The stroller of claim 1, wherein: The front support comprises a front support rod and a connecting piece fixedly arranged on the upper portion of the front support rod, the rear support comprises rear support rods arranged on left and right sides respectively, the upper portions of the rear support rods on each side are rotationally connected with the corresponding side of the connecting piece respectively, and the lower portion of the push rod assembly is slidingly connected with the upper portion of the front support rod; And / or, the push rod assembly comprises an upper push rod and a lower push rod, the lower portion of the upper push rod is slidingly connected with the upper portion of the lower push rod, the lower portion of the lower push rod is slidingly connected with the upper portion of the front support rod, and the front support rod, the lower push rod and the upper push rod are all arc-shaped; And / or, the front support rod and the lower push rod both have a lumen extending in the length direction thereof, the lower push rod is slidingly arranged in the lumen of the front support rod in the length extending direction of the lumen of the front support rod, and the upper push rod is slidingly arranged in the lumen of the lower push rod in the length extending direction of the lumen of the lower push rod; And / or, the push rod assembly further comprises a push handle, the push handle extends in the left-right direction, and the upper portion of the upper push rod is fixedly arranged in the middle portion of the push handle.