Cart

Abstract

The utility model relates to a cart which comprises a front support, a rear support, a push rod frame, a connecting frame, a front wheel assembly and a rear wheel assembly, when the cart is in an unfolded state, the upper portion of the rear support is connected to the front support in a rotating mode, and the lower portion of the push rod frame is connected to the rear support in a rotating mode. The front portion of the connecting frame is rotationally connected with the upper portion of the front support, the rear portion of the connecting frame is rotationally connected to the push rod frame, the front wheel assembly is arranged at the bottom of the front support, the rear wheel assembly is arranged at the bottom of the rear support, and the stroller is folded when the stroller is in a folded state. The front support, the rear support, the push rod frame and the connecting frame extend in the up-down direction and are folded in the front-back direction. The number of rod pieces of the stroller is small, the structure is simple, folding operation is convenient, the size of the folded stroller is relatively small, the structure of the folded stroller is relatively flat, and great convenience is brought to daily carrying, storage and the like of a user.

Description

TECHNICAL FIELD

[0001] The utility model relates to children's articles field, concretely relates to a stroller. BACKGROUND

[0002] In prior art, the structure of children's stroller is various, the stroller frame usually includes the front support, rear support and push rod frame which are rotationally connected with each other, and the connecting rod assembly arranged between the front support, rear support and push rod frame to realize the linkage between the front support, rear support and push rod frame, so as to realize the unfolding and folding of the stroller frame. At present, the number of the rod pieces of the children's stroller is usually more, and the size after folding is still large, the overall weight is large and is not conducive to daily carrying, and is also not conducive to the reduction of production cost. SUMMARY

[0003] The utility model aims at providing a new stroller to solve one or more problems of prior art.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme of: a stroller, the stroller has an unfolded state and a folded state, the stroller includes a front support, a rear support, a push rod frame, a connecting frame, a front wheel assembly and a rear wheel assembly, the upper part of the rear support is rotationally connected to the front support when the stroller is in the unfolded state, the lower part of the push rod frame is rotationally connected to the rear support, the front part of the connecting frame is rotationally connected to the upper part of the front support, the rear part of the connecting frame is rotationally connected to the push rod frame, the front wheel assembly is arranged at the bottom of the front support, and the rear wheel assembly is arranged at the bottom of the rear support, the front support, rear support, push rod frame and connecting frame all extend along the up-down direction and are mutually folded along the front-back direction when the stroller is in the folded state.

[0005] Preferably, the stroller further includes a support seat and a seat mechanism, the seat mechanism at least includes a seat, the seat is installed on the support seat, wherein the support seat is rotationally connected to the upper part of the front support or rotationally connected to the front part of the connecting frame, or the support seat is rotationally connected with the upper part of the front support and the front part of the connecting frame around the same rotation center line, the support seat and the seat mechanism are folded on the front side of the front support or on the rear side of the connecting frame when the stroller is in the folded state.

[0006] In some embodiments, the seat mechanism further comprises a backrest, a lower portion of the backrest being rotatably connected to an end portion of the seat, the seat being rotatably connected to the support base about a rotation center line extending in a vertical direction, the stroller being in an unfolded state, the seat mechanism having at least a forward use position and a reverse use position, in the forward use position, the backrest being located between the seat and the push bar frame, in the reverse use position, the seat being located between the backrest and the push bar frame.

[0007] In some embodiments, the seat mechanism further comprises a backrest, a lower portion of the backrest being rotatably connected to an end portion of the seat, the push bar frame extending upwardly and rearwardly from front to back, the stroller being in an unfolded state, at least a portion of the push bar frame extending rearwardly of the backrest.

[0008] In some embodiments, the stroller being in an unfolded state, the push bar frame is substantially parallel to the backrest.

[0009] In some embodiments, the stroller being in an unfolded state, an angle between an extending direction of the push bar frame and a horizontal plane is 75°±10°.

[0010] In some embodiments, the stroller being in an unfolded state, the connection frame extends rearwardly and downwardly from front to back, and the connection frame has an extension portion located rearwardly of the push bar frame, the seat mechanism being in the reverse use position, the extension portion forming a support portion capable of providing foot support for a sitter.

[0011] In some embodiments, the stroller further comprises a connection member, one end of the connection member being connected to the front support or the rear support, and the other end of the connection member being connected to the connection frame, so as to enclose a receiving space.

[0012] In some embodiments, the support base is rotatably connected to an upper portion of the front support and a front portion of the connection frame about a rotation center line, the stroller being in a folded state, the support base and the seat mechanism being folded together at a front side of the front support.

[0013] In some embodiments, the push bar frame comprises a lower push bar frame and an upper push bar frame, the lower push bar frame being rotatably connected to the connection frame and the rear support, the upper push bar frame being arranged to be unfolded and folded along a length direction with respect to the lower push bar frame.

[0014] In some embodiments, a lower portion of the upper push bar frame is rotatably connected to an upper portion of the lower push bar frame, the upper push bar frame extending in a vertical direction and being located above the lower push bar frame as a whole when the stroller is in an unfolded state, the upper push bar frame being folded rearwardly of the lower push bar frame when the stroller is in a folded state.

[0015] In some embodiments, the rear support comprises a support body extending in the up-down direction, and a rear wheel joint fixed to the lower part of the support body, the rear wheel joint extending rearward from the lower part of the support body, the rear wheel assembly is mounted to the rear part of the rear wheel joint, and the lower part of the push rod frame is rotatably connected to the front part of the rear wheel joint.

[0016] In some embodiments, the rear wheel joint has two groups arranged on the left and right sides respectively, and each group of the rear wheel joint is provided with a rear wheel assembly; when the stroller is in the folded state, the front wheel assembly is folded between the two groups of rear wheel assemblies, and the rear wheel assemblies are located in front of the last end of the front wheel assembly in the front-rear direction.

[0017] In some embodiments, the upper part of the rear support is rotatably connected to the front support around a first center line, the lower part of the push rod frame is rotatably connected to the lower part of the rear support around a second center line, the rear part of the connecting frame is rotatably connected to the push rod frame around a third center line, and the upper part of the front support is rotatably connected to the front part of the connecting frame around a rotation center line, when the stroller is in the unfolded state, the first center line, the rotation center line, the second center line and the third center line are parallel to each other and sequentially arranged in the front-rear direction.

[0018] Thanks to the use of the above technical solutions, the stroller provided by the present application has the following advantages compared with the prior art: the stroller mainly comprises a front support, a rear support, a connecting frame and a push rod frame, the number of overall rod members is small, the structure is simple, the folding operation is convenient, the size of the stroller after folding is relatively small, and the structure after folding is relatively flat, which brings great convenience to the daily carrying and storage of users.

[0019] Further, by rotatably connecting the support seat to the upper part of the front support or the front part of the connecting frame, and providing a seat mechanism on the support seat, the seat mechanism can have a forward use position and a reverse position on the stroller, and the seat mechanism can be folded together with other rod members in the stroller relative to the front support or the connecting frame, which does not cause excessive increase in the size of the stroller after folding, and does not need to be disassembled and folded separately, which is convenient for daily use of users. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating laborious work.

[0021] ATTACHMENT Figure 1This is a three-dimensional structural diagram of the stroller frame of a child stroller in an unfolded state according to a specific embodiment of the present utility model, wherein the seat mechanism is in the forward use position;

[0022] Appendix Figure 2 For the appendix Figure 1 A side view of the trolley's structure;

[0023] Appendix Figure 3 For the appendix Figure 2 A side view diagram of the seat mechanism in the trolley when it is switched to the reverse use position;

[0024] Appendix Figure 4 For the appendix Figure 1 A front view diagram of the trolley's structure;

[0025] Appendix Figure 5 For the appendix Figure 1 A top view of the trolley's structure;

[0026] Appendix Figure 6 For the appendix Figure 2 Based on this, a schematic diagram of the seat mechanism after the backrest is folded down relative to the seat;

[0027] Appendix Figure 7 For the appendix Figure 6 Based on this, a schematic diagram of the upper push rod frame shortened along the length direction;

[0028] Appendix Figure 8 For the appendix Figure 7 Based on this, the upper push rod frame flips and folds relative to the lower push rod frame, and the structural diagram of the relative folding process of each rod in the trolley;

[0029] Appendix Figure 9 For the appendix Figure 8 A schematic diagram of the trolley after further folding;

[0030] Appendix Figure 10 For the appendix Figure 9 A schematic diagram showing the structure of the stroller after it has been further folded up;

[0031] Appendix Figure 11 For the appendix Figure 1 A side view of the trolley in its folded state;

[0032] Appendix Figure 12 For the appendix Figure 11 A schematic diagram of the rear view structure;

[0033] Wherein: 1, front support; 11, front support rod; 12, front cross rod; 2, rear support; 21, support body; 22, rear wheel joint; 3, connecting frame; 31, extension; 3a, connecting rod; 3b, connecting cross rod; 4, push rod frame; 41, lower push rod frame; 411, lower push rod; 42, upper push rod frame; 5, support seat; 6, seat mechanism; 61, seat; 62, backrest; 10, front wheel assembly; 20, rear wheel assembly. DETAILED DESCRIPTION

[0034] The preferred embodiments of the present application will be described in detail with reference to the drawings, so that the advantages and features of the present application can be more easily understood by those skilled in the art. It should be noted that the description of these embodiments is used to help understand the present application, but does not constitute a limitation on the present application. In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as they do not conflict with each other.

[0035] In this paper, the orientation or position relationship indicated by "up", "down", "left", "right" and the like is defined based on the orientation and position relationship observed by the user when pushing the cart, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0036] Figures 1 to 12 The drawings are drawn in true proportion, and in order to maintain the brevity of the specification, the proportions of the elements are not listed one by one, but the proportions and positions of the elements should be considered as part of the content of the specification.

[0037] Referring to Figures 1 to 12 A cart shown in the drawing has an unfolded state and a folded state, the cart includes a front support 1, a rear support 2, a push rod frame 4, a connecting frame 3, a front wheel assembly 10 and a rear wheel assembly 20, the cart is in an unfolded state, the front support 1 extends upwardly from front to back, the rear support 2 extends upwardly from back to front, the connecting frame 3 extends in the front-back direction, the push rod frame 4 extends in the up-down direction and extends forwardly from top to bottom, wherein the upper part of the rear support 2 is rotatably connected to the front support 1, the lower part of the push rod frame 4 is rotatably connected to the rear support 2, the front part of the connecting frame 3 is rotatably connected to the upper part of the front support 1, the rear part of the connecting frame 3 is rotatably connected to the push rod frame 4, the front wheel assembly 10 is arranged at the bottom of the front support 1, and the rear wheel assembly 20 is arranged at the bottom of the rear support 2. When the cart is folded, the front support 1, the rear support 2, the connecting frame 3 and the push rod frame 4 are rotated and folded in the front-back direction; when the cart is in a folded state, as shown in Figure 11 , Figure 12As shown, the front support 1, the rear support 2, the connecting support 3 and the push rod support 4 are all converted to extend along the up-down direction and fold together along the front-back direction, and the front wheel assembly 10 and the rear wheel assembly 20 are folded together.

[0038] The stroller further comprises a support seat 5 and a seat mechanism 6, the seat mechanism 6 at least comprises a seat 61, which is mounted on the support seat 5. The support seat 5 is rotatably connected to the upper portion of the front support 1 or the front portion of the connecting support 3, or the support seat 5 and the upper portion of the front support 1 and the front portion of the connecting support 3 are rotatably connected around the same rotation center. When the stroller is in the unfolded state, the seat 61 is substantially in the horizontal direction, providing support for the user to sit and stand; when the stroller is folded, the support seat 5 rotates with the seat mechanism 6 relative to the front support 1 or the connecting support 3, so that the support seat 5 can be flipped forward to the front side of the front support 1 or flipped backward to the rear side of the connecting support 3. In this way, when the stroller is in the folded state, the support seat 5 and the seat mechanism 6 are folded together on the front side of the front support 1 or on the rear side of the connecting support 3, without the need to remove the seat mechanism 6 for separate folding.

[0039] The seat mechanism 6 further comprises a backrest 62, the lower portion of which is rotatably connected to one end of the seat 61. The seat 61 is rotatably connected to the support seat 5 around a rotation center line Y extending in the up-down direction, which allows the seat mechanism 6 to be used in reverse, specifically, when the stroller is in the unfolded state, the seat mechanism 6 has at least a forward use position and a reverse use position. In the forward use position, as shown in Figure 1 、 Figure 2 , in the front-back direction, the backrest 62 is located between the seat 61 and the push rod support 4, and the sitter sits on the seat 61 facing away from the pusher and facing the direction of the stroller travel; in the reverse use position, as shown in Figure 3 , the seat 61 is located between the backrest 62 and the push rod support 4, and the sitter sits on the seat 61 facing away from the direction of the stroller travel and facing the pusher.

[0040] Referring to the drawings, in the stroller provided by the embodiment, each rod is specifically arranged as follows:

[0041] The front support 1 comprises a front support rod 11 extending in the up-down direction, and a front cross rod 12 provided at the lower portion of the front support rod 11 and extending in the left-right direction, the lower portion of the front support rod 11 is connected to the middle portion of the front cross rod 12, and the front wheel assembly 10 has two groups and is respectively mounted on the left and right end portions of the front cross rod 12. Here, the front cross rod 12 is arranged as a footrest to provide foot support for the sitter when the seat mechanism 6 is in the forward use position.

[0042] The push rod frame 4 comprises a lower push rod frame 41 and an upper push rod frame 42. The lower push rod frame 41 is rotatably connected to the connecting frame 3 and the rear support 2. The upper push rod frame 42 is arranged to be unfolded or folded along the length direction relative to the lower push rod frame 41. Here, the lower part of the upper push rod frame 42 is rotatably connected to the upper part of the lower push rod frame 41. The two parts can be unfolded or folded by relative rotation, so that the push rod frame 4 is unfolded or folded along the length direction. When the stroller is in the unfolded state, the upper push rod frame 42 is located above the lower push rod frame 41. Here, the upper push rod frame 42 and the lower push rod frame 41 extend along the same length direction. When the stroller is in the unfolded state, the push rod frame 4 extends upward from front to back. At least part of the structure of the push rod frame 4 extends behind the backrest 62. In some embodiments, the push rod frame 4 is substantially parallel to the backrest 62. When the stroller is in the unfolded state, the structure looks more beautiful. In particular, when the stroller is in the unfolded state, the angle between the extension direction of the push rod frame 4 and the horizontal plane is 75°±10°. This makes it easier for the user to hold and apply force when pushing.

[0043] In this embodiment, the upper push rod frame 42 itself is also arranged to be telescopic along the length direction. When the push rod frame 4 is fully unfolded, the size of the folded push rod frame 4 is as small as possible, so that the size of the entire stroller is reduced after folding.

[0044] The rear support 2 comprises two support bodies 21 arranged on the left and right sides and extending in the up-down direction. The upper parts of the two support bodies 21 are rotatably connected to the front support 11 about the first center line X1. The two support bodies 21 each extend outward in the left-right direction from top to bottom. The lower part of each support body 21 is fixedly provided with a rear wheel joint 22. When the stroller is in the unfolded state, the rear wheel joint 22 extends rearward from the lower part of the support body 21. The rear wheel assembly 20 is installed at the rear of the rear wheel joint 22. The lower part of the push rod frame 4 is rotatably connected to the front part of the two rear wheel joints 22. Here, the lower push rod frame 41 has two lower push rods 411 arranged on the left and right sides and extending in the up-down direction. The two lower push rods 411 are each rotatably connected to the front part of the corresponding rear wheel joint 22 about the second center line X2.

[0045] The front part of the connecting frame 3 is rotatably connected to the upper part of the front support 1 about the rotation center line X0. The rear part of the connecting frame 3 is rotatably connected to the push rod frame 4 about the third center line X3. When the stroller is in the unfolded state, the connecting frame 3 extends downward from front to back. The connecting frame 3 has an extension part 31 located behind the push rod frame 4. When the seat mechanism 6 is in the reverse use position, the extension part 31 forms a support part for the feet of a sitter. That is, when a child sits facing the pusher, his / her feet can be supported on the extension part 31. The extension part 31 can also be used to fix a basket cover for storage.

[0046] Here specifically, the connecting frame 3 has two connecting rods 3a arranged on the left and right sides, and a connecting cross rod 3b arranged between the rear portions of the two connecting rods 3a. The connecting rods 3a on the two sides are respectively connected to the corresponding lower push rod 411 to rotate about the second center line X2. The connecting rod 3a on each side is connected to the lower push rod 411 on the side to rotate, and the connecting rod 3a and the connecting cross rod 3b together form an extension 31.

[0047] In this embodiment, the upper portion of the front support 1, the front portion of the connecting frame 3, and the support seat 5 are connected to rotate about the rotation center line X0. When the stroller is folded, the support seat 5 and the seat mechanism 6 are flipped forward relative to the front support 1 and the connecting frame 3, so that the seat mechanism 6 is folded on the front side of the front support 1. The rotation center line X0, the first center line X1, the second center line X2, and the third center line X3 all extend in the left-right direction and are parallel to each other.

[0048] Without being shown, the stroller also includes a connecting member connected at one end to the front support 1 or the rear support 2 and at the other end to the connecting frame 3 to enclose a storage space for storing items for the user to carry with the stroller.

[0049] The stroller also includes a locking mechanism for locking it in the unfolded state. In this embodiment, the locking mechanism can include one or more combinations of the following locking components: (1) a first locking component arranged between the upper portion of the front support 1, the front portion of the connecting frame 3, and the support seat 5 to lock them relative to each other; (2) a second locking component arranged on the push rod frame 4 to lock the upper push rod frame 42 relative to the lower push rod frame 41; (3) a third locking component arranged between the seat 61 and the support seat 5 to lock the seat mechanism 6 in the forward use position or the reverse use position; and (4) a fourth locking component arranged between the backrest 62 and the seat 61 to lock the seat mechanism 6 in the unfolded state.

[0050] When the stroller is in the unfolded state, as shown in Figures 1 to 5 , the front support 1, the rear support 2, the connecting frame 3, and the push rod frame 4 are opened relative to each other, the upper push rod frame 42 of the push rod frame 4 is elongated in the length direction and unfolded relative to the lower push rod frame 41, and the first center line X1, the rotation center line X0, the second center line X2, and the third center line X3 are arranged in the front-rear direction. The front wheel assembly 10 and the rear wheel assembly 20 are supported on the ground, and there is a large distance between the front wheel assembly 10 and the rear wheel assembly 20, which can provide stable support. The seat mechanism 6 can be rotated about the rotation center line Y0 to be in the forward use position as shown in Figure 2 , or converted to the reverse use position as shown in Figure 3 , and the conversion operation is also very convenient.

[0051] When the seat mechanism 6 is in the forward use position and the stroller needs to be folded, the following steps can be taken: referring to Figure 6 the backrest 62 is rotated to be folded relative to the seat 61; then, referring to Figures 7 to 10 the upper push rod holder 42 is reduced in length in the length direction, and the upper push rod holder 42 is further driven to overturn backward relative to the lower push rod holder 41, and the push rod holder 4 is further driven to rotate as a whole, so that the front support 1, the rear support 2, the push rod holder 4 and the connecting holder 3 are gradually folded along the front and rear directions by rotating relative to each other. Finally, the folded stroller is as shown in Figure 11 , Figure 12 the front support 1, the rear support 2, the connecting holder 3 and the push rod holder 4 are folded along the front and rear directions, and the seat mechanism 6 is folded on the front side of the front support 1, wherein the front support 1, the rear support 2 and the connecting holder 3 are mostly folded between the lower push rods 411 on the two sides of the push rod holder 4, so that the front and rear directions are as close as possible, and the rear wheel assembly 20 is as close to the front as possible, and is located in front of the last end of the front wheel assembly 10 as a whole, which makes the size of the folded stroller in the front and rear directions as small as possible. The structure of the folded stroller is relatively flat, which brings convenience for users to store and carry it daily.

[0052] Without illustrations, when the seat mechanism 6 is in the reverse use position and the stroller needs to be folded, the difference from the steps shown in Figures 6 to 10 is that the seat mechanism 6 can be folded behind the connecting holder 3 and in the structure of the front support 1, the rear support 2, the connecting holder 3 and the push rod holder 4 folded along the front and rear directions, which can also achieve the folding operation of the stroller with the seat mechanism 6 and the size of the folded stroller is still small.

[0053] It should be noted that, unless specifically defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. If there is a conflict between the definitions used in this text and the definitions in other public documents, the definitions used herein shall prevail.

[0054] It should also be noted that the "rotary connection" in the above embodiments refers to a pivot connection, unless the context clearly indicates other rotary connection methods.

[0055] As shown in the specification and claims, the terms "comprise" and "include" only indicate the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements.

[0056] It should be further understood that "multiple" in the present disclosure refers to two or more, and other quantifiers are similar. The association relationship between the associated objects described by "and / or" indicates that there can be three relationships, for example, A and / or B can represent three cases: A exists alone, A and B exist together, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after it. The singular forms "a", "said" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0057] It should be further understood that the terms "first", "second", and the like are used to describe various information, but these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not represent a specific order or importance. In fact, the expressions "first", "second", and the like can be completely interchangeable. For example, the first information can also be referred to as the second information without departing from the scope of the present disclosure, and similarly, the second information can also be referred to as the first information.

[0058] The above examples 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 it cannot limit the protection scope of the present application. Any equivalent changes or modifications made in accordance with the essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A stroller characterized by: The stroller has an unfolded state and a folded state, and comprises a front support, a rear support, a push rod support, a connecting support, a front wheel assembly and a rear wheel assembly. In the unfolded state, the upper part of the rear support is rotatably connected to the front support, the lower part of the push rod support is rotatably connected to the rear support, the front part of the connecting support is rotatably connected to the upper part of the front support, the rear part of the connecting support is rotatably connected to the push rod support, the front wheel assembly is arranged at the bottom of the front support, and the rear wheel assembly is arranged at the bottom of the rear support. In the folded state, the front support, the rear support, the push rod support and the connecting support all extend in the up-down direction and are folded in the front-rear direction.

2. The cart of claim 1, wherein: The stroller further comprises a support seat and a seat mechanism, the seat mechanism at least comprises a seat, and the seat is mounted on the support seat. The support seat is rotatably connected to the upper part of the front support or the front part of the connecting support, or the support seat is rotatably connected to the upper part of the front support and the front part of the connecting support around the same rotation center line. In the folded state, the support seat and the seat mechanism are folded together on the front side of the front support or on the rear side of the connecting support.

3. The cart of claim 2, wherein: The seat mechanism further comprises a backrest, the lower part of the backrest is rotatably connected to one end of the seat, and the seat is rotatably connected to the support seat around a rotation center line extending in the up-down direction. In the unfolded state, the seat mechanism has at least a forward use position and a reverse use position. In the forward use position, the backrest is located between the seat and the push rod support. In the reverse use position, the seat is located between the backrest and the push rod support. The seat mechanism further comprises a backrest, the lower part of the backrest is rotatably connected to one end of the seat, and the seat is rotatably connected to the support seat around a rotation center line extending in the up-down direction. In the unfolded state, the seat mechanism has at least a forward use position and a reverse use position. In the forward use position, the backrest is located between the seat and the push rod support. In the reverse use position, the seat is located between the backrest and the push rod support. In the unfolded state, the push rod support extends upwardly and rearwardly, and at least part of the structure of the push rod support extends behind the backrest. In the unfolded state, the push rod support is substantially parallel to the backrest.

4. The cart of claim 3, wherein: In the unfolded state, the angle between the extension direction of the push rod support and the horizontal plane is 75°±10°. In the unfolded state, the connecting support extends downwardly and rearwardly, and the connecting support has an extension part located behind the push rod support. In the reverse use position of the seat mechanism, the extension part forms a support part capable of providing support for the feet of a sitter.

5. The cart of claim 2, wherein: The stroller further comprises a connecting piece, one end of the connecting piece is connected to the front support or the rear support, and the other end of the connecting piece is connected to the connecting support, so as to surround a containing space. The support seat, the upper part of the front support and the front part of the connecting support are rotatably connected around a rotation center line. In the folded state, the support seat and the seat mechanism are folded together on the front side of the front support.

6. The cart of claim 1, wherein: The push rod frame comprises a lower push rod frame and an upper push rod frame, the lower push rod frame is rotatably connected with the connecting frame and the rear support, and the upper push rod frame is arranged to be unfolded and folded along the length direction relative to the lower push rod frame.

7. The cart of claim 6, wherein: The lower part of the upper push rod frame is rotatably connected with the upper part of the lower push rod frame, when the stroller is in the unfolded state, the upper push rod frame extends along the up-down direction and is located above the lower push rod frame as a whole, and when the stroller is in the folded state, the upper push rod frame is folded behind the lower push rod frame.

8. The cart of claim 1, wherein: The rear support comprises a support body extending along the up-down direction, and a rear wheel joint fixed to the lower part of the support body, the rear wheel joint extends rearward from the lower part of the support body, the rear wheel assembly is installed at the rear part of the rear wheel joint, and the lower part of the push rod frame is rotatably connected to the front part of the rear wheel joint.

9. The cart of claim 8, wherein: The rear wheel joint has two groups arranged on the left and right sides respectively, each group of the rear wheel joint is provided with one rear wheel assembly, when the stroller is in the folded state, the front wheel assembly is folded between the two groups of rear wheel assemblies, and the rear wheel assemblies are located in front of the last end of the front wheel assembly as a whole in the front-rear direction.

10. The cart of claim 1, wherein: The upper part of the rear support is rotatably connected with the front support around a first center line, the lower part of the push rod frame is rotatably connected with the lower part of the rear support around a second center line, the rear part of the connecting frame is rotatably connected with the push rod frame around a third center line, the upper part of the front support is rotatably connected with the front part of the connecting frame around a rotation center line, and when the stroller is in the unfolded state, the first center line, the rotation center line, the second center line and the third center line are parallel to each other and sequentially distributed in the front-rear direction.

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