Stroller

Abstract

The utility model discloses a child stroller which comprises a stroller frame, a wheel assembly and a limiting piece, the stroller frame comprises a first support and a second support which are rotationally connected through a first shaft, the wheel assembly is rotationally connected with the first support through a second shaft, and the limiting piece is movably arranged on the first support; when the baby stroller is in an unfolded state, the limiting pieces are far away from the wheel assemblies; when the stroller is folded, the second support can be matched with the limiting piece so as to drive the limiting piece to move in the direction close to the wheel assembly. The wheel assembly is provided with a first limiting part and a second limiting part which are matched with the limiting piece to limit the rotation angle of the wheel assembly relative to the first support. In the folding process and in the folding state of the stroller, the rotation angle of the wheel assembly can be limited through the limiting piece, so that the wheel assembly can only rotate within the set angle range, and the problem that when the stroller is folded and unfolded, the wheels are clamped in the stroller frame and need to be manually pulled by people can be avoided.

Description

TECHNICAL FIELD

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

[0002] The children's pushchair is a very convenient children's walking tool, which is generally used when adults carry children to go out. The children's pushchair generally can be folded to facilitate the carrying and storage of the children's pushchair. The children's pushchair generally comprises a foldable frame, a front wheel installed at the front of the frame, a rear wheel installed at the rear of the frame, a locking device capable of locking the frame in an open state, and a seat pocket installed on the frame for a baby to sit. In the prior art, the front wheel is easily stuck in the frame of the pushchair when folding or after folding, and the pushchair frame can only be further folded or unfolded after the front wheel is manually pulled out of the frame, which makes the folding and unfolding operation of the children's pushchair inconvenient. SUMMARY

[0003] The utility model aims at the deficiency in the prior art, and provides a children's pushchair which limits the rotation angle of the wheel to avoid the wheel from being stuck in the frame.

[0004] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of:

[0005] A children's pushchair has an unfolded state and a folded state, comprising:

[0006] A pushchair frame comprises a first support and a second support connected by a first shaft;

[0007] A wheel assembly is connected to the first support by a second shaft;

[0008] A limiting piece is movably arranged on the first support;

[0009] When the children's pushchair is in the unfolded state, the limiting piece is away from the wheel assembly; when the children's pushchair is folded, the second support can cooperate with the limiting piece to drive the limiting piece to move towards the wheel assembly.

[0010] The wheel assembly is provided with a first limiting part and a second limiting part cooperating with the limiting piece to limit the rotation angle of the wheel assembly relative to the first support.

[0011] In some embodiments, the first limiting part and the second limiting part are arranged along the circumferential direction of the second shaft, and the rotation of the wheel assembly is limited when the limiting piece abuts against the limiting part.

[0012] In some embodiments, the wheel assembly comprises a fork and a wheel rotatably arranged on the fork.

[0013] The upper portion of the wheel fork is provided with a protrusion protruding upward and a recess provided opposite to the protrusion, the protrusion is offset from the second shaft; the first and second limiting portions are provided on the two sides opposite to the protrusion;

[0014] Or, the upper portion of the wheel fork is provided with a recess, the recess has two inner walls provided opposite along the circumferential direction of the second shaft, the two inner walls form the first and second limiting portions respectively;

[0015] When the second support rotates relative to the first support when the stroller is folded, the limiting member moves to the recess relative to the wheel assembly.

[0016] In some embodiments, a first inclined guide surface is provided on one side of the protrusion towards the first support, the first inclined guide surface is inclined towards the recess to guide the limiting member to slide from the first inclined guide surface to the recess;

[0017] When the limiting member moves relative to the wheel assembly, the limiting member moves to abut against the first inclined guide surface and slides along the first inclined guide surface to drive the wheel assembly to rotate.

[0018] In some embodiments, two first inclined guide surfaces are provided, the two first inclined guide surfaces are intersected and inclined towards the two opposite sides;

[0019] The lower portion of the limiting member is further provided with a second inclined guide surface, when the limiting member moves relative to the wheel assembly, the limiting member moves to abut against the first inclined guide surface with the second inclined guide surface, the second inclined guide surface is provided with two second inclined guide surfaces, the two second inclined guide surfaces are intersected and inclined towards the two opposite sides.

[0020] In some embodiments, the first support has a support body and an extension portion extending from the support body towards the inner side of the support body, the second support is rotatably installed on the extension portion and located on the inner side of the support body, and the wheel assembly is rotatably installed on the bottom of the extension portion;

[0021] The extension portion has an inner side edge and an outer side edge provided opposite in the left-right direction, and the limiting member is provided close to the inner side edge;

[0022] In the left-right direction, the second shaft is provided opposite between the limiting member and the first shaft;

[0023] The first shaft is provided close to the outer side edge;

[0024] The first shaft is arranged obliquely to the horizontal plane and is arranged obliquely downward rearward.

[0025] In some embodiments, the upper portion of the wheel fork is provided with a column portion which is inserted into the first support, the recess is located outside the column portion and is concave downward from the upper end of the column portion, the recess extends in the circumferential direction, the lower portion of the limiting member is inserted into the recess and is movable along the extension direction of the recess when the stroller is in the folded state, and the convex portion is fixedly arranged in the recess.

[0026] In some embodiments, the second support is provided with a third inclined guide surface which is arranged in abutting engagement with the limiting member, so that the limiting member is driven to move relative to the first support when the stroller is folded by rotating the second support relative to the first support.

[0027] The second support is provided with a clamping groove, and the upper portion of the limiting member is located in the clamping groove, and the third inclined guide surface is arranged on the side wall of the clamping groove.

[0028] In some embodiments, the limiting member is arranged to be slidable up and down on the first support.

[0029] The stroller further comprises a resilient member arranged between the first support and the limiting member, and the elastic force of the resilient member is used to drive the limiting member to move away from the wheel assembly.

[0030] In some embodiments, the first supports are arranged on the left and right sides respectively, the second support is provided with two second supports, the two second supports are arranged between the first supports on the left and right sides, one end of the two second supports is rotationally connected, the other end of each second support is rotationally connected to the first support on the corresponding side through the first shaft, when the stroller is in the unfolded state, the two second supports are sequentially arranged in the left-right direction, the first shaft extends in the front-rear direction, and the second shaft extends in the up-down direction; when the stroller is folded, the two second supports are rotated towards each other so that the first supports on the left and right sides are close to each other in the left-right direction.

[0031] The second support is a foot pedal for a child to step on.

[0032] The wheel assembly is arranged on the left and right sides respectively corresponding to the first supports, and each wheel assembly on each side comprises a wheel; when the stroller is in the unfolded state, the wheels on the left and right sides are parallel to each other; when the stroller is in the folded state, the wheels on the left and right sides are inclined to each other and abut each other.

[0033] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: During and after folding, the limiting component of the stroller can cooperate with the wheel assembly to limit the rotation angle of the wheel assembly, so that the wheel assembly can only rotate relative to the first bracket within the set angle range. This avoids the problem that the wheels are stuck in the stroller frame when the stroller is folded or unfolded and need to be manually turned, making the folding and unfolding operation of the stroller convenient. Attached Figure Description

[0034] Appendix Figure 1 This is a three-dimensional schematic diagram of the stroller in the unfolded state according to this embodiment;

[0035] Appendix Figure 2 This is a side view of the stroller in the unfolded state according to this embodiment;

[0036] Appendix Figure 3 This is one of the exploded schematic diagrams of the position of the first bracket and wheel assembly when the stroller is in the unfolded state according to this embodiment;

[0037] Appendix Figure 4 This is the second exploded view of the position of the first support and wheel assembly when the stroller is in the unfolded state in this embodiment;

[0038] Appendix Figure 5 For the appendix Figure 2 sectional view along line AA;

[0039] Appendix Figure 6 This is a three-dimensional schematic diagram of the stroller in this embodiment during the folding process;

[0040] Appendix Figure 7 This is a side view of the stroller in this embodiment during the folding process;

[0041] Appendix Figure 8 This is a three-dimensional schematic diagram of the stroller in the folded state according to this embodiment;

[0042] Appendix Figure 9 This is a front view of the stroller in the folded state according to this embodiment;

[0043] Appendix Figure 10 This is a schematic diagram of the structure of the first bracket and wheel assembly when the stroller of this embodiment is in the folded state;

[0044] Appendix Figure 11 For the appendix Figure 10 sectional view along line AA;

[0045] Appendix Figure 12 For the appendix Figure 10 Schematic diagram of cross section along line BB.

[0046] Wherein: 11, the first support; 111, the support body; 112, the extension; 12, the second support; 121, the clamping groove; 121a, the third inclined guide surface; 13, the rear support assembly; 131, the rear upper rod; 132, the rear lower rod; 14, the push rod assembly; 15, the side armrest; 16, the lower connecting rod; 17, the front connecting rod; 18, the rear pull rod; 19, the rear cross brace; 21, the wheel fork; 211, the convex part; 211a, the first inclined guide surface; 211b, the first limiting part; 211c, the second limiting part; 212, the concave part; 213, the column part; 22, the wheel; 31, the first shaft; 32, the second shaft; 4, the limiting piece; 41, the second inclined guide surface; 5, the elastic piece; 6, the rear wheel assembly. DETAILED DESCRIPTION

[0047] The technical scheme of the utility model will be further described below in combination with the drawings and specific embodiments.

[0048] In the following description, the directions such as "front", "rear", "left", "right", "up", and "down" are all according to the directions in the drawings. Figure 2 In the drawings, the left direction is "front", the right direction is "rear", the up direction is "up", and the down direction is "down". The directions perpendicular to the paper are "left" and "right". The above definitions of directions are only for the convenience of describing the utility model and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0049] As shown in Figure 1 and Figure 2 , the utility model discloses a child stroller, which comprises a stroller frame having an unfolded state and a folded state, and a wheel assembly arranged at the bottom of the stroller frame.

[0050] The stroller frame comprises a first support 11 and a second support 12, and the first support 11 and the second support 12 are rotationally connected through a first shaft 31. When the stroller frame is converted between the unfolded state and the folded state, the first support 11 and the second support 12 rotate relative to each other.

[0051] The wheel assembly is rotationally connected to the lower part of the first support 11 through a second shaft 32. Specifically, as shown in Figures 3-5 , the wheel assembly comprises a wheel fork 21 and a wheel 22 rotationally arranged on the wheel fork 21, and the upper part of the wheel fork 21 is rotationally connected to the first support 11 through the second shaft 32. When the child stroller is in the unfolded state, the wheel assembly as a whole can rotate relative to the first support 11 within a range of 360° about the second shaft 32, thereby facilitating the turning of the child stroller during travel.

[0052] AsFigures 3-5 and Figure 11 As shown in Figs. 1 and 2, the stroller further comprises a limiting member 4 movably arranged on the first support 11. When the stroller is folding and folded, the limiting member 4 can be matched with the wheel assembly, so as to block the rotation of the wheel assembly, and thus the wheel assembly can only rotate within a certain angle range around the second shaft 32 when the stroller is folding and folded, thereby avoiding the problems that the wheels 22 are stuck in the stroller frame and need to be manually pulled by hands when the stroller is folding and unfolding.

[0053] In this embodiment, the first support 11 comprises a support body 111 and an extension 112 extending from the support body 111 to the inner side of the support body 111. The second support 12 is rotationally connected with the extension 112 through the first shaft 31, and the second support 12 is located on the inner side of the support body 111. The wheel fork 21 is rotationally installed at the bottom of the extension 112 through the second shaft 32.

[0054] The extension 112 has an inner side and an outer side oppositely arranged in the left-right direction, the limiting member 4 is oppositely arranged at a position close to the inner side, and the first shaft 31 is oppositely arranged at a position close to the outer side. In the left-right direction, the second shaft 32 is oppositely arranged between the limiting member 4 and the first shaft 31.

[0055] The limiting member 4 has a first position and a second position relative to the first support 11. When the stroller is in an unfolded state, the limiting member 4 is in the first position in the first support 11, at this time, the limiting member 4 is away from the wheel assembly, so that the limiting member 4 does not block the rotation of the wheel assembly, that is, it does not affect the normal travel of the stroller, as shown in Figs. 1 and 2. Figure 5 When the stroller is folding, the limiting member 4 moves from the first position to the second position, and when the limiting member 4 moves a certain distance, the limiting member 4 can be matched with the wheel assembly. When the stroller is in a folded state, the limiting member 4 is in the second position in the first support 11, at this time, the limiting member 4 is matched with the wheel assembly, as shown in Figs. 3 and 4. Figure 11 and Figure 12 Thus, during the folding process and after the stroller is folded, the limiting member 4 can block the rotation of the wheel assembly, so that the wheel assembly can only rotate within a certain angle range around the second shaft 32.

[0056] The wheel fork 21 is provided with a first limiting portion 211b and a second limiting portion 211c, and the first limiting portion 211b or the second limiting portion 211c is in abutment with the limiting member 4 during the folding process and in the folded state of the stroller, so as to limit the rotation angle of the wheel assembly.

[0057] Specifically, in this embodiment, as shown in Figs. 1 and 2, Figure 4 and Figure 5As shown, the upper portion of the wheel fork 21 is provided with a protrusion 211 protruding upward, and the protrusion 211 is eccentrically arranged relative to the second shaft 32. When the stroller is folded, the limiting member 4 can move to abut against the protrusion 211, and the limiting member 4 is located on a rotation path of the protrusion 211 rotating around the second shaft 32. In this way, when the protrusion 211 rotates around the second shaft 32, the limiting member 4 can block the protrusion 211, thereby limiting the rotation angle of the protrusion 211, i.e., the rotation angle of the wheel assembly.

[0058] In this embodiment, the first limiting portion 211b and the second limiting portion 211c are arranged on opposite sides of the protrusion 211.

[0059] The upper portion of the wheel fork 21 also has a recess 212 recessed relative to the protrusion 211, and the recess 212 is located on the side of the circumferential direction of the protrusion 211. When the stroller is folded, the limiting member 4 moves towards the wheel assembly to the recess 212.

[0060] In this embodiment, as shown, Figure 12 the upper portion of the wheel fork 21 is provided with a column portion 213 inserted into the first support 11, and the recess 212 is located on the outer side of the column portion 213 and recessed downward from the upper end of the outer side of the column portion 213. The upper portion of the wheel fork 21 is provided with the recess 212 extending in the circumferential direction. When the stroller is in the folded state, the lower portion of the limiting member 4 is inserted into the recess 212, and the protrusion 211 is fixedly arranged in the recess 212. When the wheel assembly rotates around the second shaft 32, the limiting member 4 moves in the extension direction of the recess 212. When the protrusion 211 abuts against the limiting member 4, the wheel assembly cannot continue to rotate.

[0061] In other embodiments, a recess recessed downward can be arranged on the upper portion of the wheel fork 21, and the recess is eccentrically arranged relative to the second shaft 32. When the stroller is folded, the limiting member 4 can move to be inserted into the recess and abut against an inner wall in the circumferential direction of the recess. In this way, the rotation angle of the wheel assembly can also be limited by the cooperation of the limiting member 4 and the recess. At this time, the two inner walls in the circumferential direction of the recess form a first limiting portion and a second limiting portion, respectively.

[0062] The angle corresponding to the arc length where the limiting member 4 is located is the angle that the wheel assembly is limited to rotate. In this embodiment, the angle corresponding to the arc length where the limiting member 4 is located is 80°, i.e., the maximum angle that the wheel assembly can rotate around the second shaft 32 in the folded state is 280°.

[0063] In this embodiment, the limiting member 4 is arranged in the first support 11 to be able to slide up and down, and the limiting member 4 is switched between the first position and the second position by sliding the limiting member 4 up and down relative to the first support 11.

[0064] When the stroller is folded to a certain angle, the wheel assembly interferes with other components of the stroller, and the stroller cannot be folded further. At this time, the wheel assembly needs to be manually rotated around the second shaft 32 by a certain angle, and then the stroller can be folded further. Based on this, in this embodiment, when the stroller folding limiting piece 4 is converted from the first position to the second position, the wheel assembly can be automatically rotated around the second shaft 32 relative to the first support 11 by a certain angle through the cooperation of the limiting piece 4 and the convex part 211. This can avoid the interference between the wheel assembly and other components of the stroller during the folding of the stroller, so that the stroller cannot be folded further. The structure of the folded stroller is smaller, and the folding operation of the stroller is more simple and convenient.

[0065] Specifically, as shown in Figure 3 and Figure 4 The upper part of the convex part 211 is provided with a first inclined guide surface 211a, and the lower part of the limiting piece 4 is provided with a second inclined guide surface 41 matched with the first inclined guide surface 211a. When the limiting piece 4 is in the first position, the second inclined guide surface 41 is away from the first inclined guide surface 211a. When the limiting piece 4 moves a certain distance from the first position to the second position, the second inclined guide surface 41 is in contact with the first inclined guide surface 211a, so that when the limiting piece 4 continues to move to the second position, the second inclined guide surface 41 can act on the first inclined guide surface 211a, thereby driving the wheel assembly to automatically rotate around the second shaft 32 relative to the first support 11.

[0066] The first inclined guide surface 211a is provided with two first inclined guide surfaces 211a, and the two first inclined guide surfaces 211a are intersected and inclined to the opposite sides. Correspondingly, the second inclined guide surface 41 is provided with two second inclined guide surfaces 41, and the two second inclined guide surfaces 41 are intersected and inclined to the opposite sides.

[0067] When the stroller is folded from the unfolded state, one second inclined guide surface 41 is in contact with the corresponding first inclined guide surface 211a to drive the wheel assembly to automatically rotate around the second shaft 32 to the inside of the stroller frame. When the stroller is unfolded from the folded state, the other second inclined guide surface 41 is in contact with the corresponding first inclined guide surface 211a to drive the wheel assembly to automatically rotate around the second shaft 32 to the outside of the stroller frame.

[0068] In this embodiment, the first limiting part 211b and the second limiting part 211c are arranged at the roots of the two first inclined guide surfaces 211a.

[0069] When the second support 12 is rotated relative to the first support 11, the second support 12 can act on the limiting member 4, thereby driving the limiting member 4 to move relative to the first support 11, and further move from the first position to the second position. In this way, the movement of the limiting member 4 can be achieved by the rotation of the first support 11, so that the folding operation of the stroller is simple.

[0070] Specifically, the second support 12 is provided with a third inclined guide surface 121a, which is arranged in abutment with the limiting member 4. When the second support 12 is rotated relative to the first support 11, the third inclined guide surface 121a acts on the limiting member 4, thereby driving the limiting member 4 to move relative to the first support 11.

[0071] In this embodiment, the second support 12 is provided with a clamping groove 121, and the upper portion of the limiting member 4 is located in the clamping groove 121. The third inclined guide surface 121a is arranged on the side wall of the clamping groove 121, and abuts against the upper portion of the limiting member 4.

[0072] The stroller further comprises a resilient member 5, one end of which is arranged on the first support 11, and the other end of which is arranged on the limiting member 4. The elastic force of the resilient member 5 is used to drive the limiting member 4 to remain in the first position.

[0073] As shown in Figure 1 , Figure 2 , Figures 6-9 , a specific structure of a stroller frame of a stroller is given in this embodiment.

[0074] The stroller frame comprises side supports on the left and right sides and a cross support assembly connected between the side supports on the left and right sides.

[0075] Each side support comprises a front support, a rear support assembly 13, a push rod assembly 14, a side armrest 15, a lower connecting rod 16, a front connecting rod 17, and a rear pull rod 18.

[0076] The lower portion of the front support is provided with a front wheel assembly. The front support is the first support 11 described above, and the front wheel assembly is the wheel assembly described above.

[0077] Each rear support assembly 13 comprises a rear upper rod 131 and a rear lower rod 132, and the rear lower rod 132 is slidably arranged on the rear upper rod 131 along the length extension direction of the rear upper rod 131. The lower portion of the rear lower rod 132 is provided with a rear wheel assembly 6.

[0078] The lower portion of the push rod assembly 14 is rotationally connected with the upper portion of the side armrest 15.

[0079] Two of the lower part of the side armrest 15, the upper part of the front support 11 and the upper part of the rear upper rod 131 are rotationally connected, the third is rotationally connected with any one of the former two, or the three are coaxially rotationally connected. In this embodiment, the lower part of the side armrest 15 is rotationally connected with the upper part of the rear upper rod 131, and the upper part of the front support 11 is rotationally connected with the upper part of the rear upper rod 131.

[0080] One end of the lower connecting rod 16 is rotationally connected with the lower part of the push rod assembly 14, and the lower connecting rod 16 is rotationally connected with the rear upper rod 131.

[0081] One end of the front connecting rod 17 is rotationally connected with the front support 11, and the other end of the front connecting rod 17 is rotationally connected with the lower connecting rod 16.

[0082] One end of the rear pull rod 18 is rotationally connected with the lower part of the lower connecting rod 16, and the other end of the rear pull rod 18 is rotationally connected with the rear lower rod 132.

[0083] In this way, in each side support, a four-bar linkage mechanism is formed between the rear upper rod 131, the side armrest 15, the push rod assembly 14 and the lower connecting rod 16, a four-bar linkage mechanism is formed between the front support 11, the rear upper rod 131, the lower connecting rod 16 and the front connecting rod 17, and a slider-crank mechanism is formed between the rear upper rod 131, the rear lower rod 132, the rear pull rod 18 and the lower connecting rod 16.

[0084] The cross support assembly includes a front cross support assembly and a rear cross support assembly, the front cross support assembly is arranged between the front supports on the left and right sides, and the rear cross support assembly is arranged between the rear lower rods 132 on the left and right sides.

[0085] The front cross support assembly includes two front cross support rods, one end of the two front cross support rods is rotationally connected, and the other end of the two front cross support rods is respectively rotationally connected with the front support on the corresponding side. The front cross support rod is the second support 12 described above, and in some embodiments, the front cross support rod can also be used as a footrest for children to step on.

[0086] The rear cross support assembly includes two rear cross support rods 19, one end of the two rear cross support rods 19 is rotationally connected, and the other end of the two rear cross support rods 19 is respectively rotationally connected with the rear lower rod 132 on the corresponding side.

[0087] The stroller frame further includes a first linkage mechanism and a second linkage mechanism, the first linkage mechanism and the second linkage mechanism are respectively arranged on the left and right sides, when the side supports on each side are folded during folding of the child stroller, the two front cross support rods can be driven to relatively rotate and fold through the first linkage mechanisms on the two sides, and the two rear cross support rods 19 can be driven to relatively rotate and fold through the second linkage mechanisms on the two sides, so that the side supports on the left and right sides are brought together, the child stroller is simultaneously folded longitudinally and laterally, the child stroller is convenient to fold, and the structure has a small volume after being folded.

[0088] When the stroller is in the unfolded state, the two front cross support rods are arranged in sequence along the left-right direction, the two rear cross support rods 19 are arranged in sequence along the left-right direction; the first shaft 31 extends along the front-rear direction, the first shaft 31 is arranged obliquely relative to the horizontal plane and is arranged obliquely downward; the second shaft 32 extends along the up-down direction; the limiting piece 4 is in the first position under the elastic force of the elastic piece 5; the left and right two wheels 22 are parallel. Figure 1 and Figure 2 as shown.

[0089] When the stroller is folded, the push rod assembly 14 is rotated downward and forward as a whole to approach the side handle 15, so that the side handle 15 and the lower link 16 are both rotated downward, thereby pulling the front support to rotate rearward to approach the rear support assembly 13 through the front link 17, and pulling the rear lower rod 132 to move upward relative to the rear upper rod 131 to approach the rear upper rod 131 through the rear pull rod 18. In this process, the front cross support rod is pulled to rotate relative to the front support through the first linkage mechanism, and the rear cross support rod 19 is pulled to rotate relative to the rear lower rod 132 through the second linkage mechanism, so that the left and right side supports approach each other. When the front cross support rod rotates, the limiting piece 4 is driven to move downward until the second inclined guide surface 41 abuts and cooperates with the first inclined guide surface 211a, at which time the front wheel assembly is rotated relative to the front support around the second shaft 32 to avoid interference between the front wheel assembly and the rear wheel assembly 6 or the rear support assembly 13 during the folding of the stroller. The folding process is shown in Figure 6 and Figure 7 until all the components of the stroller are closely approached together, the left and right two wheels 22 are inclined to each other and abut each other, and finally folded as shown in Figure 8 and Figure 9 The stroller is folded, the structure is compact, the volume is small, and it is convenient to carry and store.

[0090] During the folding process and in the folded state of the stroller, the limiting piece 4 cooperates with the convex portion 211, so that the front wheel assembly can only rotate within a certain angle range.

[0091] The above embodiments are only for illustrating the technical concept and characteristics of the present application, the purpose is to enable persons 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 according to 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 child stroller has an unfolded state and a folded state, comprising: a stroller frame comprising a first support and a second support connected by a first shaft; a wheel assembly connected with the first support by a second shaft; a limiting member movably arranged on the first support; when the child stroller is in the unfolded state, the limiting member is away from the wheel assembly; when the child stroller is folded, the second support can cooperate with the limiting member to drive the limiting member to move towards the wheel assembly; the wheel assembly is provided with a first limiting portion and a second limiting portion cooperating with the limiting member to limit the rotation angle of the wheel assembly relative to the first support.

2. The stroller of claim 1, wherein: The first limiting portion and the second limiting portion are arranged along the circumferential direction of the second shaft and limit the rotation of the wheel assembly when abutting against the limiting member.

3. The stroller of claim 2, wherein: The wheel assembly comprises a wheel fork and a wheel rotatably arranged on the wheel fork; the upper part of the wheel fork is provided with a convex portion protruding upward and a recess portion arranged opposite to the convex portion on the side thereof, and the convex portion is arranged away from the second shaft; the first limiting portion and the second limiting portion are arranged on the two sides opposite to the convex portion; or, the upper part of the wheel fork is provided with a recess portion having two inner walls arranged opposite to each other along the circumferential direction of the second shaft, and the two inner walls form the first limiting portion and the second limiting portion respectively; when the child stroller is folded, the limiting member moves towards the wheel assembly when the second support rotates relative to the first support.

4. The stroller of claim 3, wherein: The side of the convex portion towards the first support is provided with a first inclined guide surface, which is inclined towards the recess portion to guide the limiting member to slide from the first inclined guide surface towards the recess portion; when the limiting member moves towards the wheel assembly, the limiting member moves to abut against the first inclined guide surface and slides along the first inclined guide surface to drive the wheel assembly to rotate.

5. The stroller of claim 4, wherein: The first inclined guide surface is provided with two first inclined guide surfaces intersecting each other and inclined towards opposite sides; the lower part of the limiting member is further provided with a second inclined guide surface, and when the limiting member moves towards the wheel assembly, the limiting member moves to abut against the second inclined guide surface with the first inclined guide surface; the second inclined guide surface is provided with two second inclined guide surfaces intersecting each other and inclined towards opposite sides.

6. The stroller of claim 4, wherein: The first support has a support body and an extension portion extending from the support body towards the inner side of the support body, and the second support is rotatably mounted on the extension portion and located on the inner side of the support body; the wheel assembly is rotatably mounted on the bottom of the extension portion; the extension portion has an inner side and an outer side arranged opposite to each other in the left-right direction, and the limiting member is arranged close to the inner side; in the left-right direction, the second shaft is arranged opposite to the limiting member and the first shaft; the first shaft is arranged close to the outer side; the first shaft is inclined relative to the horizontal plane, and the first shaft is inclined towards the lower rear.

7. The stroller of claim 3, wherein: The upper part of the wheel fork is provided with a column part which is inserted into the first support, the recess part is located outside the column part and is concave downward from the upper end of the outside of the column part, the recess part extends in the circumferential direction, the lower part of the limiting piece is inserted into the recess part and can move along the extension direction of the recess part when the child stroller is in the folded state, and the convex part is fixedly arranged in the recess part.

8. The stroller of claim 1, wherein: The second support is provided with a third inclined guide surface which is in abutting engagement with the limiting piece, so that the limiting piece is driven to move relative to the first support when the child stroller is folded and the second support rotates relative to the first support. The second support is provided with a clamping groove, and the upper part of the limiting piece is located in the clamping groove, and the third inclined guide surface is arranged on the side wall of the clamping groove.

9. The stroller of claim 1, wherein: The limiting piece is arranged on the first support in a slidable manner up and down. The child stroller further comprises a resilient piece arranged between the first support and the limiting piece, and the elastic force of the resilient piece is used to drive the limiting piece to move away from the wheel assembly.

10. The stroller of claim 1, wherein: The first supports are arranged on the left and right sides respectively, the second support is provided with two, and the two second supports are arranged between the first supports on the left and right sides, one end of the two second supports is rotationally connected, and the other end of each second support is rotationally connected with the first support on the corresponding side through the first shaft; when the child stroller is in the unfolded state, the two second supports are sequentially arranged in the left-right direction, the first shaft extends in the front-rear direction, and the second shaft extends in the up-down direction; when the child stroller is folded, the two second supports are rotated towards each other so that the first supports on the left and right sides are close to each other in the left-right direction. The second support is a footrest for children to step on. The wheel assembly corresponding to the first support is arranged on the left and right sides respectively, and each side of the wheel assembly comprises a wheel; when the child stroller is in the unfolded state, the wheels on the left and right sides are parallel to each other; when the child stroller is in the folded state, the wheels on the left and right sides are inclined to each other and abut.

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