A child stroller

Abstract

The invention discloses a child stroller, comprising a frame with an unfolded state and a folded state; the frame comprises a cross support connected between side support assemblies; the cross support comprises at least one cross support assembly, the cross support assembly comprises two cross support rods respectively having inner ends and outer ends, the inner ends of the two cross support rods are rotatably connected, the outer end of one cross support rod is rotatably connected to one of the side support assemblies, and the outer end of the other cross support rod is rotatably connected to the other side support assembly; the cross support assembly also comprises an inner connecting rod for rotating the two cross support rods together, one end of the inner connecting rod is slidably and rotatably connected to the side support assembly so as to move accordingly with the unfolding or folding of the side support assembly, and the other end of the inner connecting rod is rotatably connected to the cross support rod to drive the cross support rod to rotate. The child stroller is easy to operate and compact in size after folding.

Description

Technical Field

[0001] The invention relates to the field of children's products, in particular to a children's stroller. Background Art

[0002] Strollers are widely used for children to travel and greatly facilitate children's travel. However, when carrying or storing the stroller, the entire stroller often occupies a large volume. In order to solve this problem, current strollers generally have a folding function and can be folded for carrying or storage, especially strollers that can be folded twice horizontally, which have a smaller volume.

[0003] In the current child strollers that can be folded twice horizontally, a cross brace assembly consisting of two intersecting connecting rods is generally used to connect the side bracket assemblies on both sides. Although the child stroller with this structure can be easily folded, the volume after folding is still large, and it is still not convenient to carry and store. There is room for further reducing the volume of the folded child stroller. Summary of the invention

[0004] In view of the above problems, an object of the present invention is to provide a child stroller which is easy to operate and has a compact size after being folded.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme:

[0006] A child stroller, comprising a frame having an unfolded state and a folded state, a front wheel arranged in front of the bottom of the frame, and a rear wheel arranged behind the bottom of the frame; the frame comprises at least two side bracket assemblies and a cross bracket connected between the side bracket assemblies;

[0007] The cross support comprises at least one cross support assembly, and the cross support assembly comprises two cross support rods respectively having inner ends and outer ends, the inner ends of the two cross support rods are rotatably connected, the outer end of one of the cross support rods is rotatably connected to one of the side support assemblies, and the outer end of the other cross support rod is rotatably connected to the other side support assembly;

[0008] The cross brace assembly further includes an inner connecting rod for rotating the two cross brace rods toward each other, one end of the inner connecting rod is slidably and rotatably connected to the side bracket assembly so as to move accordingly with the expansion or folding of the side bracket assembly, and the other end of the inner connecting rod is rotatably connected to the cross brace rod so as to drive the cross brace rod to rotate;

[0009] When the frame is in the unfolded state, the two transverse support rods are relatively unfolded, and when the frame is in the folded state, the outer ends of the two transverse support rods are close to each other.

[0010] Preferably, each of the side support assemblies includes a front wheel support for setting the front wheel and a rear wheel support for setting the rear wheel, and the cross support includes a first cross support assembly arranged between the front wheel supports of the two side support assemblies and a second cross support assembly arranged between the rear wheel supports of the two side support assemblies.

[0011] More preferably, the inner link of the first cross brace assembly is rotatably connected to a first sliding member, and the first sliding member is slidably disposed on the front wheel bracket; the inner link of the second cross brace assembly is rotatably connected to a second sliding member, and the second sliding member is slidably disposed on the rear wheel bracket.

[0012] Furthermore, each of the side support assemblies also includes a connecting rod assembly for driving the first sliding member and / or the second sliding member to move as the side support assembly is unfolded or folded.

[0013] Furthermore, the connecting rod assembly includes a rear support rod for driving the second sliding member to move, a pulling rod and a front support rod for linking the first sliding member and the second sliding member, the rear end of the rear support rod is rotatably connected to the second sliding member, the front end of the rear support rod is connected to other parts of the side support assembly except the rear wheel support, the front end of the pulling rod is rotatably connected to the front wheel support, the rear end of the pulling rod is rotatably connected to the second sliding member, the upper end of the front support rod is rotatably connected to the pulling rod, and the lower end of the front support rod is rotatably connected to the first sliding member.

[0014] In a specific embodiment, the side support assembly also includes an upper push rod, a lower push rod whose upper end is rotatably connected to the upper push rod, and a side support rod whose upper end is rotatably connected to the lower end of the upper push rod, the lower end of the lower push rod, the upper end of the front wheel support and the upper end of the rear wheel support are rotatably connected to each other or coaxially connected, the lower end of the side support rod is rotatably connected to the rear wheel support, the front end of the rear support rod is rotatably connected to the side support rod or the lower push rod, and the rear end of the rear support rod is rotatably connected to the second sliding member.

[0015] Furthermore, the side support assembly also includes a seat rod, the rear end of the seat rod is rotatably connected to the side support rod, the front part of the seat rod is slidably and rotatably connected to the lower push rod, and the cross support also includes a cross support assembly connected between the seat rods.

[0016] Preferably, the end of the inner link is connected to the side bracket assembly via a sliding member, the end of the inner link is rotatably connected to the sliding member, and the sliding member is slidably connected to the side bracket assembly.

[0017] Preferably, the inner ends of the two cross braces are rotatably connected via a first pivot, the outer ends of the cross braces are rotatably connected to the side bracket assembly via a second pivot, one end of the inner connecting rod is rotatably connected to the side bracket assembly via a third pivot, and the other end of the inner connecting rod is rotatably connected to the cross brace via a fourth pivot, and the axial center lines of the first pivot, each of the second pivots, each of the third pivots and each of the fourth pivots in the same cross brace assembly are parallel to each other.

[0018] Preferably, the two cross bracing rods of the same cross bracing assembly have the same length.

[0019] In combination with the above, the present invention adopts the above technical solution, which has the following advantages compared with the prior art:

[0020] One end of the inner link is slidably and rotatably connected to the side bracket assembly, and the other end is rotatably connected to the cross brace rod. When the side bracket assembly is folded, the inner link drives the two cross braces to move closer to each other, so that the cross brace assembly is folded, which is easy to operate. In addition, the lateral size of the folded cross brace assembly is smaller, which reduces the size of the folded child stroller and makes the folded volume more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0022] Figure 1 is a three-dimensional structural diagram of a child stroller according to the present invention, wherein the frame is in an unfolded state;

[0023] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0024] Figure 3 for Figure 1 A partial enlarged view of point B in the middle;

[0025] Figure 4 for Figure 1 a side view of the stroller shown;

[0026] Figure 5 for Figure 1 A three-dimensional structural diagram of the child stroller shown, wherein the frame is in the folding process;

[0027] Figure 6 for Figure 5 a side view of the stroller shown;

[0028] Figure 7 for Figure 1 A three-dimensional structural diagram of the child stroller shown, wherein the frame is in a folded state;

[0029] Figure 8 for Figure 7 A side view of the stroller shown.

[0030] in,

[0031] 1. Side support assembly; 11. Upper push rod; 111. Upper rod; 112. Lower rod; 12. Lower push rod; 13. Front wheel support; 131. First sliding sleeve; 14. Rear wheel support; 141. Second sliding sleeve; 15. Side support rod; 16. Rear support rod; 17. Pull rod; 18. Front support rod; 19. Seat rod; 191. Seat rod sliding sleeve;

[0032] 2. cross bracket; 21a. cross brace; 21b. cross brace; 22a. inner connecting rod; 22b. inner connecting rod; 23. first connecting rod; 24. second connecting rod; 201. first cross brace assembly; 202. second cross brace assembly; 203. cross brace assembly; 204. push rod connecting assembly;

[0033] 3. Front wheel;

[0034] 4. Rear wheel. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art. The directional words mentioned in the present invention are defined based on the conventional viewing angles of the unfolded stroller by those skilled in the art, such as "front" and "rear" respectively corresponding to Figure 2 The left and right sides of the paper.

[0036] Reference Figure 1-8 As shown, a child stroller includes a frame having an unfolded state and a folded state, a front wheel 3 arranged in front of the bottom of the frame, and a rear wheel 4 arranged in the rear of the bottom of the frame. The frame includes at least two side bracket assemblies 1 and a cross bracket 2 connected between the side bracket assemblies 1. In this embodiment, the number of the side bracket assemblies 1 is two, and they are respectively located on the left and right sides of the child stroller. In another embodiment, the number of the side bracket assemblies 1 can be three. The cross bracket 2 is used to connect the side bracket assemblies 1 on both sides.

[0037] Combination Figure 2 and Figure 3As shown, the cross support 2 includes at least one cross support assembly. Each cross support assembly includes two cross support rods (i.e., cross support rod 21a and cross support rod 21b) respectively having inner and outer ends, wherein the inner ends of the cross support rod 21a and the cross support rod 21b are rotatably connected, wherein the outer end of the cross support rod 21a is rotatably connected to one of the side support assemblies 1, and the outer end of the cross support rod 21b is rotatably connected to the other side support assembly 1. The cross support assembly also includes an inner connecting rod (i.e., inner connecting rod 22a and / or inner connecting rod 22b) for rotating and approaching the cross support rod 21a and the cross support rod 21b, one end of the inner connecting rod is slidably and rotatably connected to the side support assembly 1 so as to move accordingly with the folding of the side support assembly 1, and the other end of the inner connecting rod is rotatably connected to the cross support rod 21a and / or the cross support rod 21b to drive the cross support rod 21a and the cross support rod 21b to rotate. Specifically, the cross brace assembly includes an inner link 22a and an inner link 22b, the lower end of the inner link 22a is slidably and rotatably connected to the left side bracket assembly 1, and the upper end of the inner link 22a is rotatably connected to the cross brace rod 21a; the lower end of the inner link 22b is slidably and rotatably connected to the right side bracket assembly 1, and the upper end of the inner link 22b is rotatably connected to the cross brace rod 21b. The lower ends of the inner link 22a and the inner link 22b are respectively connected to the side bracket assembly 1 through a sliding member, and the lower ends of the inner link 22a and the inner link 22b are respectively rotatably connected to the sliding member, and the sliding member is slidably connected to the side bracket assembly 1, and the sliding member is specifically a sliding sleeve. When the frame is in the unfolded state, the cross brace 21a and the cross brace 21b are relatively unfolded and extend in the left and right directions of the stroller, and each cross brace 21a and the inner connecting rod 22a and the side bracket assembly 1 on the corresponding side form a triangular structure, and each cross brace 21b and the inner connecting rod 22b and the side bracket assembly 1 on the corresponding side form a triangular structure; when the frame is in the folded state, the outer ends of the cross brace 21a and the cross brace 21b are close to each other, and the inner ends of the cross brace 21a and the cross brace 21b are located above or below their outer ends, and the cross brace 21a, the cross brace 21b, the inner connecting rod 22a, the inner connecting rod 22b and the side bracket assembly 1 are close to each other. In addition, the lengths of the cross brace 21a and the cross brace 21b of the same cross brace assembly are equal, and the left and right cross brace assemblies are symmetrical, so as to reduce the distance between the two side bracket assemblies 1 after folding, that is, to reduce the lateral size. More preferably, the cross support 2 includes a plurality of cross bracing assemblies, and the cross bracing rods of each cross bracing assembly are of equal length.

[0038] Each side support assembly 1 includes a front wheel support 13 for arranging the front wheel 3 and a rear wheel support 14 for arranging the rear wheel 4, and the upper end of the front wheel support 13 and the upper end of the rear wheel support 14 are rotatably connected. The cross support 2 includes a first cross support assembly 201 arranged between the front wheel supports 13 of the two side support assemblies 1 and a second cross support assembly 202 arranged between the rear wheel supports 14 of the two side support assemblies 1. Figure 2As shown, in the first cross brace assembly 201, the outer ends of the cross brace rod 21a and the cross brace rod 21b are rotatably connected to the front wheel bracket 13, the upper end of the inner link 22a is rotatably connected between the two ends of the cross brace rod 21a, the upper end of the inner link 22b is rotatably connected between the two ends of the cross brace rod 21b, and the lower ends of the inner link 22a and the inner link 22b are rotatably connected to a first sliding member, which is specifically a first sliding sleeve 131 slidably mounted on the front wheel bracket 13, and the two first sliding sleeves 131 are respectively located below the cross brace rod 21a and the cross brace rod 21b. Figure 3 As shown, in the second cross brace assembly 202, the outer ends of the cross brace rod 21a and the cross brace rod 21b are respectively rotatably connected to the rear wheel bracket 14, the upper end of the inner connecting rod 22a is rotatably connected between the two ends of the cross brace rod 21a, and the upper end of the inner connecting rod 22b is rotatably connected between the two ends of the cross brace rod 21b, and the lower ends of the inner connecting rod 22a and the inner connecting rod 22b are respectively rotatably connected to a second sliding member, which is specifically a second sliding sleeve 141 slidably mounted on the rear wheel bracket 14, and the two second sliding sleeves 141 are respectively located below the cross brace rod 21a and the cross brace rod 21b.

[0039] Reference Figure 2 As shown, the inner ends of the cross brace rod 21a and the cross brace rod 21b are rotationally connected via the first pivot a1, the outer ends of the cross brace rod 21a and the cross brace rod 21b are rotationally connected to the side bracket assembly 1 via the second pivot a2, the lower ends of the inner link 22a and the inner link 22b are rotationally connected to the side bracket assembly 1 via the third pivot a3, the upper end of the inner link 22a is rotationally connected to the cross brace rod 21a via the fourth pivot a4, and the upper end of the inner link 22b is rotationally connected to the cross brace rod 21b via the fourth pivot a4, and the axial lines of the first pivot a1, each second pivot a2, each third pivot a3 and each fourth pivot a4 in the same cross brace assembly are parallel to each other, and are preferably perpendicular to the plane where the center lines of the two front wheel brackets 13 are located or the plane where the center lines of the two rear wheel brackets 14 are located.

[0040] Each side support assembly 1 also includes a connecting rod assembly for driving the first sliding sleeve 131 and / or the second sliding sleeve 141 to slide as the side support assembly 1 is unfolded or folded. When the side support assembly 1 is unfolded or folded, the connecting rod assembly moves accordingly, thereby driving the first sliding sleeve 131 to slide along the front wheel support 13 and / or the second sliding sleeve 141 to slide along the rear wheel support 14. The connecting rod assembly specifically includes a rear support rod 16 for driving the second sliding sleeve 141 to move, a pull rod 17 and a front support rod 18 located between the first sliding sleeve 131 and the second sliding sleeve 141 to link the two. The rear end of the rear support rod 16 is rotatably connected to the second sliding sleeve 141, the front end of the rear support rod 16 is connected to other parts of the side support assembly 1 except the rear wheel support 14, the front end of the pull rod 17 is rotatably connected to the front wheel support 13, the rear end of the pull rod 17 is rotatably connected to the second sliding sleeve 141, the upper end of the front support rod 18 is rotatably connected between the two ends of the pull rod 17, and the lower end of the front support rod 18 is rotatably connected to the first sliding sleeve 131.

[0041] Combination Figure 1 and 4 As shown, each side support assembly 1 specifically includes the front wheel support 13, the rear wheel support 14, the rear support rod 16, the pull rod 17, the front support rod 18, an upper push rod 11, a lower push rod 12 and a side support rod 15. The upper push rod 11 is composed of an upper rod 111 and a lower rod 112 which are arranged up and down and fixedly connected as one body, and the upper end of the lower push rod 12 is rotatably connected to the joint of the upper rod 111 and the lower rod 112 of the upper push rod 11. The lower end of the lower push rod 12, the upper end of the front wheel support 13 and the upper end of the rear wheel support 14 are connected to rotate relative to each other or coaxially, for example, two of the components are first connected to rotate with each other through a pivot, and the third component is connected to rotate with one of the above two components through another pivot; or the three are connected to rotate with each other through the same pivot. Specifically in this embodiment, the lower end of the lower push rod 12 and the upper end of the front wheel support 13 are pivotally connected to the upper part of the rear wheel support 14 respectively. The upper end of the side support rod 15 is rotatably connected to the lower end of the lower rod 112 of the upper push rod 11, and the lower end of the side support rod 15 is rotatably connected to the rear wheel bracket 14. The front end of the rear support rod 16 is specifically rotatably connected between the two ends of the side support rod 15, or rotatably connected between the two ends of the lower push rod 12.

[0042] The side support assembly 1 further includes a seat rod 19, the rear end of the seat rod 19 is rotatably connected to the side support rod 15, and the front portion of the seat rod 19 is slidably and rotatably connected to the lower push rod 12. Specifically in this embodiment, the seat rod 19 is slidably inserted in a seat rod sliding sleeve 191, and the seat rod sliding sleeve 191 is rotatably connected to the lower push rod 12; the rear end of the seat rod 19 and the upper end of the rear support rod 16 are rotatably connected to the side support rod 15 through the same pivot.

[0043] Combination Figure 1 As shown, the cross support 2 also includes a cross support assembly 203 connected between the seat bars 19 of the two side support assemblies 1. The cross support assembly 203 includes two groups of first connecting rods 23, and each group of first connecting rods 23 includes two first connecting rods 23 that cross each other to form a cross-shaped structure. The middle parts of the two first connecting rods 23 of each group are rotatably connected, and the outer ends thereof are rotatably connected to the seat bars 19, and the inner ends are rotatably connected to the inner ends of the two first connecting rods 23 of the other group. The cross support assembly 203 between the seat bars 19 can also be replaced by the above-mentioned cross support assembly.

[0044] The cross bracket 2 further includes a push rod connection assembly 204 connected between the upper ends of the upper push rods 11 of the two side bracket assemblies 1. The push rod connection assembly 204 includes two second connecting rods 24, the inner ends of the two second connecting rods 24 are rotatably connected, and the outer ends of the second connecting rods 24 are rotatably connected to the upper ends of the upper push rods 11.

[0045] The "rotational connection" mentioned in this embodiment refers to a pivot connection, which connects two or three components through a pivot and allows the components to rotate relative to each other.

[0046] Combination Figure 1-4 As shown, when the frame is in the unfolded state, the cross support 2 is unfolded, wherein the two cross support rods 21a and 21b of the first cross support assembly 201 are relatively unfolded and extend in the left-right direction of the child stroller, so that the front wheel supports 13 on both sides are unfolded; the two cross support rods 21a and 21b of the second cross support assembly 202 are relatively unfolded and extend in the left-right direction of the child stroller, so that the rear wheel supports 14 on both sides are unfolded; the cross support assembly 203 is unfolded to unfold the seat rods 19 on both sides; the two second connecting rods 24 of the push rod connecting assembly 204 are unfolded and extend in the left-right direction of the child stroller to unfold the upper push rods 11 on both sides. The upper push rods 11, the lower push rods 12, the front wheel supports 13, the rear wheel supports 14 and the side support rods 15 of each side support assembly 1 are mutually unfolded.

[0047] Combination Figure 5 and Figure 6 As shown, when the frame is folded, the locking mechanism between the upper push rod 11 and the lower push rod 12 is unlocked, the upper push rod 11 is pressed downward to lean against the rear wheel bracket 14, and the side support rod 15 pushes the rear support rod 16 to move the second sliding sleeve 141 downward, driving the pull rod 17 to rotate, so that the front wheel bracket 13 and the rear wheel bracket 14 are brought together, and the front support rod 18 rotates accordingly to push the first sliding sleeve 131 to move downward; as the second sliding sleeve 141 and the first sliding sleeve 131 move downward, the inner connecting rod 22a and the inner connecting rod 22b rotate and pull the cross brace rod 21a and the cross brace rod 21b to rotate downward, driving the first cross brace assembly 201 and the second cross brace assembly 202 to fold, and the cross brace assembly 203 and the push rod connecting assembly 204 are brought together and folded.

[0048] Combination Figure 7 and Figure 8 As shown, when the frame is in the folded state, the rods of each side support assembly 1 are brought closer to each other, the cross support rods 21a and 21b, and the inner connecting rods 22a and 22b of the first cross support assembly 201 are brought closer to each other so that the front wheel supports 13 on both sides are brought closer to each other, the two cross support rods 21a and 21b, and the two inner connecting rods 22a and 22b of the second cross support assembly 202 are brought closer to each other so that the rear wheel supports 14 on both sides are brought closer to each other, the cross support assembly 203 is folded to make the seat rods 19 on both sides close to each other, and the two second connecting rods 24 of the push rod connecting assembly 204 are brought closer to make the upper push rods 11 on both sides close to each other, thereby realizing the folding of the child stroller in the lateral direction (i.e., the left and right direction), so that the two side support assemblies 1 are close to each other.

[0049] When the side support assembly 1 is folded, the first cross brace assembly 201 and the second cross brace assembly 202 are driven to fold together, which is easy to operate. Moreover, the lateral dimensions of the folded first cross brace assembly 201 and the second cross brace assembly 202 are small, which reduces the size of the child stroller after folding (especially the size in the left and right directions), making the folded volume of the child stroller relatively compact.

[0050] The above embodiments are only for illustrating the technical concept and features of the present invention, and are preferred implementation methods. Their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent transformation or modification made according to the spirit and essence of the present invention should be included in the protection scope of the present invention.

Claims

1. A stroller for children, comprising a frame having an unfolded state and a folded state, a front wheel arranged in front of the bottom of the frame, and a rear wheel arranged in the rear of the bottom of the frame; the frame comprises at least two side bracket assemblies and a cross bracket connected between the side bracket assemblies; characterized in that: The side bracket assembly also includes a seat rod, the cross bracket includes at least one cross brace assembly, a cross brace assembly connected between the seat rods and a push rod connection assembly located between the upper push rods of the side bracket assembly, the push rod connection assembly includes a second connecting rod, the inner end of the second connecting rod is rotatably connected, and the outer end of the second connecting rod is rotatably connected to the upper push rod, the cross brace assembly includes a first cross brace assembly and a second cross brace assembly, the inner connecting rod of the first cross brace assembly is rotatably connected to a first sliding member, and the inner connecting rod of the second cross brace assembly is rotatably connected to a second sliding member, and each of the side bracket assemblies also includes a device for unfolding or folding with the side bracket assembly The linkage assembly driving the first sliding member and the second sliding member to move comprises a rear support rod for driving the second sliding member to move, a pull rod and a front support rod for linking the first sliding member and the second sliding member, the rear end of the rear support rod is rotatably connected to the second sliding member, the front end of the rear support rod is connected to other parts of the side support assembly except the rear wheel support, the front end of the pull rod is rotatably connected to the front wheel support, the rear end of the pull rod is rotatably connected to the second sliding member, the upper end of the front support rod is rotatably connected to the pull rod, and the lower end of the front support rod is rotatably connected to the first sliding member; The cross brace assembly comprises two cross brace rods respectively having inner ends and outer ends, the cross brace assembly is mirror-symmetrical, the two cross brace rods of the same cross brace assembly are of equal length, the inner ends of the two cross brace rods are rotatably connected, the outer end of one of the cross brace rods is rotatably connected to one of the side bracket assemblies, and the outer end of the other cross brace rod is rotatably connected to the other side bracket assembly; The cross brace assembly further includes an inner connecting rod for rotating the two cross brace rods toward each other, one end of the inner connecting rod is slidably and rotatably connected to the side bracket assembly so as to move accordingly with the expansion or folding of the side bracket assembly, and the other end of the inner connecting rod is rotatably connected to the cross brace rod so as to drive the cross brace rod to rotate; When the frame is in the unfolded state, the two cross braces are relatively unfolded, and a triangular structure is formed between the cross brace and the inner connecting rod and the side bracket assembly on the corresponding side. When the frame is in the folded state, the outer ends of the two cross braces are close to each other.

2. The baby stroller according to claim 1, characterized in that: Each of the side support assemblies includes a front wheel support for setting the front wheel and a rear wheel support for setting the rear wheel, and the cross support includes a first cross support assembly arranged between the front wheel supports of the two side support assemblies and a second cross support assembly arranged between the rear wheel supports of the two side support assemblies.

3. The baby stroller according to claim 2, characterized in that: The inner connecting rod of the first cross brace assembly is rotatably connected to the first sliding member, and the first sliding member is slidably disposed on the front wheel bracket; the inner connecting rod of the second cross brace assembly is rotatably connected to the second sliding member, and the second sliding member is slidably disposed on the rear wheel bracket.

4. The baby stroller according to claim 1, characterized in that: The side support assembly also includes a lower push rod whose upper end is rotatably connected to the upper push rod and a side support rod whose upper end is rotatably connected to the lower end of the upper push rod, the lower end of the lower push rod, the upper end of the front wheel support and the upper end of the rear wheel support are rotatably connected to each other or coaxially connected, the lower end of the side support rod is rotatably connected to the rear wheel support, the front end of the rear support rod is rotatably connected to the side support rod or the lower push rod, and the rear end of the rear support rod is rotatably connected to the second sliding member.

5. The stroller according to claim 4, characterized in that: The rear end of the seat post is rotatably connected to the side support rod, and the front part of the seat post is slidably and rotatably connected to the lower push rod.

6. The stroller according to claim 1, characterized in that: The end of the inner link is connected to the side bracket assembly through a sliding member, the end of the inner link is rotatably connected to the sliding member, and the sliding member is slidably connected to the side bracket assembly.

7. The stroller according to claim 1, characterized in that: The inner ends of the two cross braces are rotatably connected via a first pivot, the outer ends of the cross braces are rotatably connected to the side bracket assembly via a second pivot, one end of the inner connecting rod is rotatably connected to the side bracket assembly via a third pivot, and the other end of the inner connecting rod is rotatably connected to the cross brace via a fourth pivot, and the axial center lines of the first pivot, each of the second pivots, each of the third pivots and each of the fourth pivots in the same cross brace assembly are parallel to each other.

8. The stroller according to claim 1, characterized in that: The two cross bracing rods of the same cross bracing assembly have the same length.

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