Stroller

Abstract

The application discloses a child stroller, which comprises a cross support and two groups of side supports, the cross support can be folded in the left-right direction, each group of side supports comprises: a push rod having a first position and a second position, the push rod is rotationally connected with a side rod at the first position and is rotationally connected with a first connecting rod at the second position; a front support rod having a third position and a fourth position, the front support rod is rotationally connected with the side rod at the third position and is rotationally connected with a rear support rod at the fourth position; the first connecting rod is rotationally connected with the second connecting rod, one side of the second connecting rod is rotationally connected with the side rod, and the other side is rotationally connected with the rear support rod. In the unfolded state, the cross support is unfolded in the left-right direction, and the two groups of side supports are arranged at intervals in the left-right direction; in the folded state, the cross support is folded in the left-right direction, and the two groups of side supports are close to each other in the left-right direction. The child stroller has simple structure, novel style, simple folding operation, and can be significantly reduced in size after folding, and has a wider application range.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of children's products, in particular to a children's stroller. BACKGROUND

[0002] Children's stroller is a kind of children's product that is essential for parents to take baby out. In order to facilitate carrying and moving when going out, more and more children's strollers are developing towards the direction of more simple and light structure, and most of the current children's strollers have folding function, and the size of the frame can be significantly reduced after folding. However, the frame structures of various children's strollers on the market are different, and the folding principles are various, and the length, width and height of many children's strollers are still large after folding, which cannot be carried to special occasions such as airplanes, and there are still many inconveniences in use. SUMMARY

[0003] The purpose of the present application is to overcome the shortcomings of the prior art, and provide a foldable children's stroller with novel structure.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is:

[0005] A children's stroller has an unfolded state and a folded state, and comprises two groups of side supports arranged on the left and right sides, and a cross support connected between the two groups of side supports, the cross support can be folded relative to the left and right directions, each group of side supports comprises a push rod, a side rod, a front support rod, a rear support rod, a first connecting rod and a second connecting rod, when the children's stroller is in the unfolded state, in each group of side supports:

[0006] The push rod has a first position and a second position arranged at intervals, the push rod is connected to the upper part of the side rod at the first position in a relative rotating manner, and the push rod is connected to the upper part of the first connecting rod at the second position in a relative rotating manner;

[0007] The front support rod has a third position and a fourth position arranged at intervals, the front support rod is connected to the lower part of the side rod at the third position in a relative rotating manner, and the front support rod is connected to the rear support rod at the fourth position in a relative rotating manner;

[0008] The lower part of the first connecting rod is connected to the second connecting rod in a relative rotating manner, one side of the second connecting rod is connected to the side rod in a relative rotating manner, and the other side of the second connecting rod is connected to the rear support rod in a relative rotating manner;

[0009] When the children's stroller is in the unfolded state, the cross support is unfolded along the left and right directions, and the two groups of side supports are arranged at intervals along the left and right directions;

[0010] When the stroller is in the unfolded state, the transverse support is in the unfolded state, and the two groups of side supports are in the unfolded state.

[0011] In some embodiments, the transverse support comprises a first connecting member and a second connecting member, the first connecting member and the second connecting member are rotatably connected to each other; in each group of side supports, the rear support rod or the second connecting rod constitutes a driving rod; one end of the first connecting member is rotatably connected to the first connecting rod on one side, and one end of the second connecting member is rotatably connected to the driving rod on the same side; the other end of the first connecting member is rotatably connected to the driving rod on the other side, and the other end of the second connecting member is rotatably connected to the first connecting rod on the other side.

[0012] In some embodiments, each group of side supports comprises a rear wheel assembly, and when the stroller is in the unfolded state, the rear wheel assembly is rotatably connected to the lower part of the rear support rod; in each group of side supports, the rear support rod constitutes the driving rod.

[0013] In some embodiments, each group of side supports comprises a rear wheel assembly, and when the stroller is in the unfolded state, the rear wheel assembly is rotatably connected to the lower part of the second connecting rod; in each group of side supports, the second connecting rod constitutes the driving rod.

[0014] In some embodiments, when the stroller is in the unfolded state, one end of the first connecting member is rotatably connected to the lower end of the first connecting rod on one side, and one end of the second connecting member is rotatably connected to the lower end of the first connecting rod on the other side; in each group of side supports, along the extension direction of the first connecting rod, the rotatable connection between the first connecting rod and the second connecting rod is located above the lower end of the first connecting rod.

[0015] In some embodiments, the transverse support comprises a third connecting member and a fourth connecting member, one end of the third connecting member is rotatably connected to the front support rod on one side, one end of the fourth connecting member is rotatably connected to the front support rod on the other side, and the other end of the third connecting member is rotatably connected to the other end of the fourth connecting member; when the stroller is in the unfolded state, the third connecting member and the fourth connecting member respectively extend in the left-right direction; when the stroller is in the folded state, the third connecting member and the fourth connecting member respectively extend in the up-down direction.

[0016] In some embodiments, each of the side supports comprises a pull rod, one end of the pull rod is rotatably connected with the rear support rod of the same side, and the other end of the pull rod is rotatably connected with the third connecting member or the fourth connecting member of the same side.

[0017] In some embodiments, the transverse support comprises a seat assembly, the seat assembly comprises a backrest plate, a first connecting plate and a second connecting plate, the first connecting plate is rotatably connected with the side support of one side, the second connecting plate is rotatably connected with the side support of the other side, the first connecting plate is slidably connected with the backrest plate, and the second connecting plate is slidably connected with the backrest plate; when the stroller is in the unfolded state, the first connecting plate and the second connecting plate are arranged on the left and right sides of the backrest plate; when the stroller is in the folded state, the first connecting plate and the second connecting plate are close to each other in the left-right direction, and the first connecting plate and the second connecting plate are folded on one side of the thickness direction of the backrest plate.

[0018] In some embodiments, each of the side supports comprises a seat rod and a sliding member, when the stroller is in the unfolded state, in each of the side supports, the sliding member is rotatably connected with the side rod, the rear part of the seat rod is rotatably connected with the first connecting rod, and the seat rod is slidably connected with the sliding member; the first connecting plate is rotatably connected with the sliding member of one side, and the second connecting plate is rotatably connected with the sliding member of the other side.

[0019] In some embodiments, the first connecting plate has at least one first protrusion and at least one first recess, the first protrusion protrudes towards the second connecting plate in the left-right direction, and the first recess is recessed away from the second connecting plate; the second connecting plate has at least one second protrusion and at least one second recess, the second protrusion protrudes towards the first connecting plate in the left-right direction, and the second recess is recessed away from the first connecting plate; when the stroller is in the unfolded state, the first connecting plate and the second connecting plate are arranged apart in the left-right direction; when the stroller is in the folded state, the first protrusion is fitted and clamped in the second recess, and the second protrusion is fitted and clamped in the first recess.

[0020] With the above technical scheme, the child stroller provided by the embodiment of the present application has simple structure, novel style, simple folding operation, and significantly reduced size in the up-down and front-back directions after folding, and the foldable cross support can further reduce the size of the child stroller in the left-right direction, so that the child stroller is more portable when going out, and the child stroller can also be folded to stand by itself, which is convenient for storage, and even can meet the size requirement of carrying luggage on an airplane, so that the application range is wider. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme of the present application, the drawings required to be used in the following embodiment description will be briefly introduced.

[0022] FIG. 1 is a perspective view of the child stroller in the unfolded state according to the embodiment 1 of the present application; Figure 1 FIG. 2 is a side view of the child stroller in the unfolded state according to the embodiment 1 of the present application;

[0023] FIG. 3 is a perspective view of the child stroller in the folding process according to the embodiment 1 of the present application; Figure 2 FIG. 4 is a side view of the child stroller in the folding process according to the embodiment 1 of the present application;

[0024] FIG. 5 is a perspective view of the child stroller in the folded state according to the embodiment 1 of the present application; Figure 3 FIG. 6 is a side view of the child stroller in the folded state according to the embodiment 1 of the present application;

[0025] FIG. 7 is a partial perspective view of the seat assembly according to the embodiment 1 of the present application; Figure 4 FIG. 8 is a partial front view of the seat assembly in the unfolded state according to the embodiment 1 of the present application;

[0026] FIG. 9 is a partial rear view of the seat assembly in the folded state according to the embodiment 1 of the present application; Figure 5 FIG. 10 is a perspective view of the child stroller in the unfolded state according to the embodiment 2 of the present application;

[0027] FIG. 11 is a side view of the child stroller in the unfolded state according to the embodiment 2 of the present application; Figure 6 FIG. 12 is a perspective view of the child stroller in the folded state according to the embodiment 2 of the present application;

[0028] Figure 7 FIG. 13 is a partial perspective view of the seat assembly according to the embodiment 2 of the present application;

[0029] FIG. 14 is a partial front view of the seat assembly in the unfolded state according to the embodiment 2 of the present application; Figure 8 FIG. 15 is a partial rear view of the seat assembly in the folded state according to the embodiment 2 of the present application;

[0030] Figure 9 FIG. 16 is a partial rear view of the seat assembly in the folded state according to the embodiment 2 of the present application;

[0031] FIG. 17 is a partial rear view of the seat assembly in the folded state according to the embodiment 2 of the present application; Figure 10 FIG. 18 is a perspective view of the child stroller in the unfolded state according to the embodiment 3 of the present application;

[0032] FIG. 19 is a side view of the child stroller in the unfolded state according to the embodiment 3 of the present application; Figure 11 FIG. 20 is a perspective view of the child stroller in the folded state according to the embodiment 3 of the present application;

[0033] ​​Wherein: 100, side bracket; 110, push rod; 111, first position; 112, second position; 120, side rod; 130, front support rod; 131, third position; 132, fourth position; 140, rear support rod; 150, first connecting rod; 160, second connecting rod; 171, seat rod; 172, sliding member; 180, pull rod; 191, front wheel assembly; 192, rear wheel assembly;

[0034] 200. Horizontal support; 201. First rotating part; 202. Second rotating part; 203. Handle bar; 210. First connecting piece; 220. Second connecting piece; 230. Third connecting piece; 240. Fourth connecting piece; 250. Backrest panel; 251. First inclined groove; 252. Second inclined groove; 260. First connecting plate; 261. First protrusion; 2611. First sliding column; 262. First groove; 263. First Vertical groove; 270, second connecting plate; 271, second protrusion; 2711, second sliding column; 272, second groove; 273, second vertical groove; 280, seat connecting rod; 291, first backrest connecting rod; 2911, first guide post; 292, second backrest connecting rod; 2921, second guide post; 1001, first axis line; 1002, second axis line; 1003, third axis line; 1004, fourth axis line. Detailed Implementation

[0035] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more readily understood by those skilled in the art.

[0036] It should be noted that the descriptions of directions such as "up and down," "front and back," and "left and right" in this article are all based on the appendix. Figure 1 Or attached Figure 10 The definition of the direction observed by a child sitting normally in the stroller when it is in the unfolded state and facing the direction of push of the stroller is only for the purpose of describing and understanding the specific solutions of different embodiments of the present invention, and does not mean that the stroller provided by the invention must have a specific placement orientation.

[0037] Example 1

[0038] See Figures 1 to 9As shown, this embodiment provides a stroller with an unfolded state and a folded state. The stroller includes two sets of side supports 100 located on the left and right sides, and a horizontal support 200 connecting the two sets of side supports 100. The horizontal support 200 can be folded relative to each other in the left-right direction. The horizontal support 200 mainly includes a first connecting member 210, a second connecting member 220, a third connecting member 230, a fourth connecting member 240, a seat assembly, and a handle bar 203. The two sets of side supports 100 have identical structures and are symmetrically arranged. Each set of side supports 100 includes a push rod 110, a side rod 120, a front support rod 130, a rear support rod 140, a first connecting rod 150, and a second connecting rod 160. In this embodiment, each set of side supports 100 also includes a seat rod 171, a sliding member 172, a pull rod 180, a front wheel assembly 191, and a rear wheel assembly 192.

[0039] See Figures 1 to 6 As shown in this embodiment, when the stroller is in the unfolded state, the horizontal support 200 unfolds in the left and right directions, and the two sets of side supports 100 are spaced apart in the left and right directions, allowing the child to sit normally in the stroller; when the stroller is in the folded state, the horizontal support 200 is folded in the left and right directions, and the two sets of side supports 100 are brought closer to each other in the left and right directions. At the same time, each set of side supports 100 can be folded in the up and down and front and back directions, which significantly reduces the overall size of the stroller, making it easy to carry or store.

[0040] See Figure 1 and Figure 2As shown, when the stroller is in the unfolded state, in each set of side supports 100: the push rod 110 has a first position 111 and a second position 112 spaced apart. The push rod 110 is rotatably connected to the upper part of the side rod 120 at the first position 111, and the push rod 110 is rotatably connected to the upper part of the first connecting rod 150 at the second position 112; the front support rod 130 has a third position 131 and a fourth position 132 spaced apart. The front support rod 130 is rotatably connected to the lower part of the side rod 120 at the third position 131, and the front support rod 130 is rotatably connected to the rear support rod 140 at the fourth position 132; the lower part of the first connecting rod 150 is rotatably connected to the second connecting rod 160, one side of the second connecting rod 160 is rotatably connected to the side rod 120, and the other side of the second connecting rod 160 is rotatably connected to the rear support rod 140. In the aforementioned push rod 110, side rod 120, front support rod 130, rear support rod 140, first connecting rod 150, and second connecting rod 160, the axis of rotation between any two rotatably connected components extends in the left-right direction. Thus, in each set of side supports 100, the push rod 110, side rod 120, first connecting rod 150, and second connecting rod 160 form one four-bar linkage, while the side rod 120, front support rod 130, rear support rod 140, and second connecting rod 160 form another four-bar linkage. These two four-bar linkages are linked through the shared side rod 120 and second connecting rod 160. Therefore, by driving any one of the rods (usually the push rod 110) to rotate relative to the other, the entire set of side supports 100 can be rotated, folded, or unfolded, making the overall structure of the stroller simple and easy to operate.

[0041] See Figure 1 and Figure 2 As shown in this embodiment, when the stroller is in the unfolded state, in each set of side supports 100, along the extension direction of the push rod 110, the first position 111 is located above the second position 112; specifically, the first position 111 is located in front of and above the second position 112. When the stroller is in the unfolded state, the side rod 120 and the first connecting rod 150 extend gradually upward from front to back, with the side rod 120 located in front of the first connecting rod 150. In this way, the side rod 120 and the first connecting rod 150 can be arranged relatively close but spaced apart in the front-back direction, and they will not interfere with each other during rotation.

[0042] See Figure 1 and Figure 2As shown, in this embodiment, when the stroller is in the unfolded state, in each set of side supports 100, the front support rod 130 gradually extends upward from front to back, the rear support rod 140 gradually extends downward from front to back, and the second connecting rod 160 gradually extends downward from front to back, with the rear support rod 140 located below the second connecting rod 160. The front wheel assembly 191 is rotatably connected to the lower part of the front support rod 130, and the rear wheel assembly 192 is rotatably connected to the lower part of the rear support rod 140. Along the extending direction of the front support rod 130, the third position 131 is located above the fourth position 132. Thus, the side rod 120 and the rear support rod 140 will not interfere with each other during relative rotation. In this embodiment, the front side of the second link 160 is rotatably connected to the side rod 120, and the rear side of the second link 160 is rotatably connected to the rear support rod 140. Along the extension direction of the second link 160, the rotatable connection between the first link 150 and the second link 160 is located between the aforementioned front and rear sides.

[0043] See Figure 1 and Figure 2 As shown, in this embodiment, when the stroller is in the unfolded state, in each set of side supports 100, the sliding member 172 and the side rod 120 are rotatably connected relative to each other. The seat rod 171 extends in the front-to-back direction, and the rear part of the seat rod 171 is rotatably connected relative to the first connecting rod 150. The seat rod 171 can slide relative to the sliding member 172 along its own extension direction. Here, the rotation axis of the seat rod 171 and the sliding member 172 respectively extends in the left-to-right direction. The sliding member 172 is specifically a sliding sleeve, and the seat rod 171 can slide relative to each other through the inner cavity of the sliding sleeve. In this way, when the first connecting rod 150 and the side rod 120 are retracted relative to each other, the seat rod 171 can be driven to rotate synchronously and slide to retract.

[0044] See Figure 1 As shown, in this embodiment, a grip 203 is connected between the push rods 110 on both sides. Specifically, the upper end of each push rod 110 can be rotatably connected to one side of the grip 203. The rotation axis lines on both sides extend in the vertical direction, so that the push rods 110 on both sides can be rotated and retracted to the rear side of the grip 203.

[0045] See Figure 1 and Figure 3As shown, in each set of side supports 100, the rear support rod 140 or the second connecting rod 160 constitutes the driving rod; in this embodiment, the rear support rod 140 specifically constitutes the driving rod. In the horizontal support 200, the first connecting member 210 and the second connecting member 220 are rotatably connected relative to each other; one end of the first connecting member 210 is rotatably connected to the first connecting rod 150 on one side, and one end of the second connecting member 220 is rotatably connected to the driving rod on that side; the other end of the first connecting member 210 is rotatably connected to the driving rod on the other side, and the other end of the second connecting member 220 is rotatably connected to the first connecting rod 150 on the other side. In this embodiment, the first connecting member 210 and the second connecting member 220 are respectively rod-shaped and symmetrically arranged left and right, thereby forming an "X"-shaped rotating connection structure. When the stroller is in the unfolded state, one end of the first connecting member 210 is rotatably connected to the lower end of the first connecting rod 150 on one side, and one end of the second connecting member 220 is rotatably connected to the lower end of the first connecting rod 150 on the other side. Each side of the first connecting rod 150 has a first rotating part 201 at its lower end, and the first connecting member 210 and the second connecting member 220 are rotatably connected to the corresponding first rotating part 201. Similarly, each side of the rear support rod 140 has a second rotating part 202 at its lower end, and the first connecting member 210 and the second connecting member 220 are rotatably connected to the corresponding second rotating part 202. (See also...) Figure 1 and Figure 2 As shown, when the stroller is in the unfolded state, in each set of side supports 100, along the extension direction of the first connecting rod 150, the rotatable connection between the first connecting rod 150 and the second connecting rod 160 is located above the lower end of the first connecting rod 150. The ends of the first connecting member 210 and the second connecting member 220 on the same left and right sides are relatively close to each other, so that the first connecting rod 150 and the rear support rod 140 on the left and right sides are relatively far apart; see also Figures 3 to 6 As shown, when the stroller is converted to a folded state, the first link 150 flips backward, causing the first rotating part 201 to rise upward, and the ends of the first connector 210 and the second connector 220 on the same side move away from each other, thereby driving the first link 150 and the rear support rod 140 on the left and right sides to move closer to each other.

[0046] See Figures 1 to 6As shown, in the horizontal support 200 of this embodiment, one end of the third connector 230 is rotatably connected to the front support rod 130 on one side, one end of the fourth connector 240 is rotatably connected to the front support rod 130 on the other side, and the other end of the third connector 230 is rotatably connected to the other end of the fourth connector 240. Further, each set of side supports 100 includes a pull rod 180, one end of which is rotatably connected to the rear support rod 140 on the same side, and the other end of which is rotatably connected to either the third connector 230 or the fourth connector 240 on the same side. Thus, when the side supports 100 on both sides are folded simultaneously, the rear support rod 140 and the front support rod 130 on each side move closer to each other, and the pull rod 180 can drive the corresponding third connector 230 or fourth connector 240 to rotate relative to each other, thereby realizing the folding of the horizontal support 200 in the left-right direction. When the stroller is in the unfolded state, the third connector 230 and the fourth connector 240 extend in the left and right directions respectively, which can be used as footrests for children to place their feet; when the stroller is in the folded state, the third connector 230 and the fourth connector 240 extend in the up and down directions respectively, and the third connector 230 and the fourth connector 240 are close to each other.

[0047] See Figure 1 , Figures 7 to 9 As shown, in this embodiment, the seat assembly in the horizontal support 200 includes at least a backrest 250, a first connecting plate 260, and a second connecting plate 270. The first connecting plate 260 is rotatably connected to one side support 100, and the second connecting plate 270 is rotatably connected to the other side support 100. The first connecting plate 260 and the backrest 250 are slidably connected, and the second connecting plate 270 is also slidably connected to the backrest 250, allowing the first connecting plate 260 and the second connecting plate 270 to move closer or further apart in the left-right direction, thus enabling the seat assembly to fold and unfold. In this embodiment, the first connecting plate 260 is specifically rotatably connected to one side sliding member 172, and the second connecting plate 270 is specifically rotatably connected to the other side sliding member 172. In other embodiments, the first connecting plate 260 and the second connecting plate 270 may also be rotatably connected to the seat post 171, side post 120, or first connecting rod 150 on the same side, respectively. Here, the first connecting plate 260 and the second connecting plate 270 can rotate relative to each other around the fourth axis 1004, which extends in the left and right direction, so that the backrest plate 250, the first connecting plate 260 and the second connecting plate 270 as a whole can flip up and down relative to the side bracket 100.

[0048] See Figures 7 to 9As shown, in this embodiment, the backrest plate 250, the first connecting plate 260, and the second connecting plate 270 are all plate-shaped, with the first connecting plate 260 and the second connecting plate 270 located on the same side of the thickness direction of the backrest plate 250. The first connecting plate 260 has at least one first protrusion 261 and at least one first groove 262. In the left-right direction, the first protrusion 261 protrudes towards the second connecting plate 270, and the first groove 262 is recessed in a direction away from the second connecting plate 270. Correspondingly, the second connecting plate 270 has at least one second protrusion 271 and at least one second groove 272. In the left-right direction, the second protrusion 271 protrudes towards the first connecting plate 260, and the second groove 272 is recessed in a direction away from the first connecting plate 260. Specifically, when the stroller is in the unfolded state, the first connecting plate 260 and the second connecting plate 270 are spaced apart in the left-right direction. The first connecting plate 260 has a first groove 262, a first protrusion 261, another first groove 262, and another first protrusion 261 arranged sequentially from top to bottom; the second connecting plate 270 has a second protrusion 271, a second groove 272, another second protrusion 271, and another second groove 272 arranged sequentially from top to bottom. When the stroller is in the folded state, the first connecting plate 260 and the second connecting plate 270 are close to each other, and each first protrusion 261 can be fitted into a corresponding second groove 272, while each second protrusion 271 can be fitted into a corresponding first groove 262, so the first connecting plate 260 and the second connecting plate 270 can fit tightly together.

[0049] Furthermore, in this embodiment, the backrest panel 250 is provided with a first inclined groove 251 and a second inclined groove 252. The first inclined groove 251 and the second inclined groove 252 each have two spaced apart along the height direction of the backrest panel 250. The extending directions of the two first inclined grooves 251 are parallel to each other, and the extending directions of the two second inclined grooves 252 are parallel to each other. The inclined extending directions of each first inclined groove 251 and second inclined groove 252 are opposite. Figure 8From the shown perspective, the first connecting plate 260 is located on the left side of the backrest plate 250, and the second connecting plate 270 is located on the right side of the backrest plate 250. Each first inclined groove 251 extends upward gradually from left to right, and each second inclined groove 252 extends downward gradually from left to right. Correspondingly, each first protrusion 261 of the first connecting plate 260 is provided with a first sliding post 2611, and each first sliding post 2611 can be slidably inserted into one of the first inclined grooves 251; each second protrusion 271 of the second connecting plate 270 is provided with a second sliding post 2711, and each second sliding post 2711 can be slidably inserted into one of the second inclined grooves 252. In other embodiments, the first connecting plate 260 may also have one or more first protrusions 261, each first protrusion 261 having a first sliding post 2611, and the number of first inclined grooves 251 may be increased or decreased accordingly with the number of first sliding posts 2611; similarly, the specific number of second inclined grooves 252 may be increased or decreased accordingly with the number of second sliding posts 2711.

[0050] See Figures 7 to 9 As shown, in this embodiment, the seat assembly further includes a first backrest link 291 and a second backrest link 292. One end of the first backrest link 291 is rotatably connected to the first connecting plate 260, and the other end of the first backrest link 291 has a first guide post 2911. One end of the second backrest link 292 is rotatably connected to the second connecting plate 270, and the other end of the second backrest link 292 has a second guide post 2921. Further, the first connecting plate 260 has a first vertical groove 263 extending along the height direction of the backrest plate 250, and the second guide post 2921 is slidably inserted into the first vertical groove 263. The second connecting plate 270 has a second vertical groove 273 extending along the height direction of the backrest plate 250, and the first guide post 2911 is slidably inserted into the second vertical groove 273. In this embodiment, when the stroller is in the unfolded state, one end of the first backrest link 291 is rotatably connected to the lower part of the first connecting plate 260 around the first axis 1001, and the first vertical groove 263 is located above the first axis 1001; one end of the second backrest link 292 is rotatably connected to the lower part of the second connecting plate 270 around the second axis 1002, and the second vertical groove 273 is located above the second axis 1002; the middle parts of the first backrest link 291 and the second backrest link 292 are also rotatably connected around the third axis 1003. The first axis 1001, the second axis 1002, and the third axis 1003 are parallel to each other, and their extension directions are parallel to the thickness direction of the backrest plate 250.

[0051] See Figures 7 to 9From the perspective shown, in this embodiment, when the stroller is in the unfolded state, the first connecting plate 260 and the second connecting plate 270 are respectively disposed on the left and right sides of the backrest plate 250, and the first connecting plate 260 and the second connecting plate 270 are lower than the height of the backrest plate 250. Each first sliding post 2611 is located at the lower end of the corresponding first inclined groove 251, each second sliding post 2711 is located at the lower end of the corresponding second inclined groove 252, the first guide post 2911 is located at the lower end of the second vertical groove 273, and the second guide post 2921 is located at the lower end of the first vertical groove 263. When the stroller is in the folded state, the first connecting plate 260 and the second connecting plate 270 move closer to each other in the left-right direction. The first connecting plate 260 and the second connecting plate 270 are folded together on one side of the thickness direction of the backrest plate 250. Each first sliding post 2611 slides to the upper end of the corresponding first inclined groove 251, each second sliding post 2711 slides to the upper end of the corresponding second inclined groove 252, the first guide post 2911 slides to the upper end of the second vertical groove 273, and the second guide post 2921 slides to the upper end of the first vertical groove 263.

[0052] See Figure 7 As shown, in this embodiment, the seat assembly also includes seat connecting rods 280, which connect the seat rods 171 on both sides and the sliding member 172, enabling the folding and unfolding of the seat rods 171 on both sides. Specifically, four seat connecting rods 280 are shown here, rotatably connected in sequence. The specific connection method of the seat connecting rods 280 can be found in existing technology and will not be described further here.

[0053] In this embodiment, the stroller also includes a locking mechanism (not shown in the figure) for locking it in the unfolded state. The specific structure of the locking mechanism can be referred to the prior art, and the present invention is not limited thereto.

[0054] See Figure 3 and Figure 4 As shown, when the stroller needs to be converted from an unfolded state to a folded state, the locking mechanism is first unlocked. Then, the push rods 110 on both sides can be driven to fold backward and move downward simultaneously. During the downward rotation of the push rods 110, the side rods 120 and the first connecting rod 150 connected to them can be driven to flip backward, thereby folding and closing the four-bar linkage consisting of the push rods 110, side rods 120, first connecting rods 150 and second connecting rods 160. At the same time, the seat rod 171 can be driven to slide and rotate to close together with the side rods 120 and the first connecting rod 150. On the other hand, the rotational movement of the side rods 120 and the second connecting rod 160 can be linked to the four-bar linkage consisting of the front support rod 130 and the rear support rod 140 to rotate and close synchronously, thereby realizing the folding and closing of the entire side support 100. During the above process, the side supports 100 on both sides can move synchronously, and the cross support 200 closes in the left and right direction, so that the side supports 100 on both sides are brought closer together, thereby realizing the folding of the entire stroller.

[0055] See Figure 5 and Figure 6 As shown in this embodiment, when the stroller is in a folded state, its lateral thickness, front-to-back length, and vertical height are significantly reduced. Along the lateral direction, the front wheel assembly 191 and the rear wheel assembly 192 can partially or completely overlap, and the front wheel assembly 191 and the rear wheel assembly 192 can be supported on the same horizontal plane, enabling the stroller to fold and stand upright, making it easier to store and fold.

[0056] Example 2

[0057] See Figure 10 and Figure 11 As shown, this embodiment provides another type of stroller. The overall structure of this stroller is basically the same as that of Embodiment 1. It also has an unfolded state and a folded state, including two sets of side supports 100 symmetrically arranged on the left and right sides, and a horizontal support 200 connected between the two sets of side supports 100. The horizontal support 200 can be folded relative to each other in the left and right directions. The main difference between this embodiment and Embodiment 1 is that the specific connection positions of the rear support rod 140, the second connecting rod 160 and the rear wheel assembly 192 in each set of side supports 100 are different.

[0058] See Figure 10 and Figure 11 As shown in this embodiment, when the stroller is in the unfolded state, in each set of side brackets 100, the rear support rod 140 and the second connecting rod 160 gradually extend downward from front to back. The rear support rod 140 is also located below the second connecting rod 160. The rear end of the rear support rod 140 is rotatably connected to the second connecting rod 160. The rear wheel assembly 192 is rotatably connected to the lower part of the second connecting rod 160.

[0059] In this embodiment, the second connecting rod 160 in each set of side supports 100 constitutes a driving rod. That is, in the horizontal support 200 of this embodiment, one end of the first connecting member 210 is rotatably connected to the second connecting rod 160 on one side, and one end of the second connecting member 220 is rotatably connected to the second connecting rod 160 on the other side.

[0060] The above differences do not constitute a substantial difference between the folding principle of the stroller in this embodiment and that in embodiment 1. The stroller in this embodiment can also achieve the linkage folding of the two side supports 100 and the middle horizontal support 200. The folding and unfolding operation is simple, and the size of the stroller is significantly reduced after folding, making it easy to carry and store.

[0061] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A stroller having an unfolded state and a folded state, the stroller comprising two sets of side supports disposed on the left and right sides, and a cross support connecting the two sets of side supports, characterized in that: The horizontal support can be folded relative to each other in the left and right directions. Each set of side supports includes a push rod, a side rod, a front support rod, a rear support rod, a first connecting rod, and a second connecting rod. When the stroller is in the unfolded state, in each set of side supports: the push rod has a first position and a second position set at intervals. The push rod is rotatably connected to the upper part of the side rod at the first position, and the push rod is rotatably connected to the upper part of the first connecting rod at the second position. The front support rod has a third position and a fourth position spaced apart. At the third position, the front support rod is rotatably connected to the lower part of the side rod, and at the fourth position, it is rotatably connected to the rear support rod. The lower part of the first connecting rod is rotatably connected to the second connecting rod, one side of the second connecting rod is rotatably connected to the side rod, and the other side of the second connecting rod is rotatably connected to the rear support rod. When the stroller is in the unfolded state, the horizontal support extends in the left-right direction, and the two sets of side supports are spaced apart in the left-right direction. When the stroller is in the folded state, the horizontal support retracts in the left-right direction, and the two sets of side supports move closer to each other in the left-right direction. The horizontal support includes a first connector and a second connector, which are rotatably connected relative to each other. In each set of side supports, the rear support rod or the second connecting rod constitutes a drive rod. One end of the first connector is rotatably connected to the first connecting rod on one side, and one end of the second connector is rotatably connected to the drive rod on that side. The other end of the first connector is rotatably connected to the drive rod on the other side, and the other end of the second connector is rotatably connected to the first connecting rod on the other side.

2. The stroller according to claim 1, characterized in that: Each set of side brackets includes a rear wheel assembly, which is rotatably connected to the lower part of the rear support rod when the stroller is in the unfolded state; in each set of side brackets, the rear support rod constitutes the drive rod.

3. The stroller according to claim 1, characterized in that: Each set of side brackets includes a rear wheel assembly, which is rotatably connected to the lower part of the second link when the stroller is in the unfolded state; in each set of side brackets, the second link constitutes the drive rod.

4. The stroller according to claim 1, characterized in that: When the stroller is in the unfolded state, one end of the first connector can be rotatably connected to the lower end of the first link on one side, and one end of the second connector can be rotatably connected to the lower end of the first link on the other side; in each set of side brackets, along the extension direction of the first link, the rotatable connection between the first link and the second link is located above the lower end of the first link.

5. The stroller according to claim 1, characterized in that: The horizontal support includes a third connector and a fourth connector. One end of the third connector is rotatably connected to the front support rod on one side, and one end of the fourth connector is rotatably connected to the front support rod on the other side. The other end of the third connector is rotatably connected to the other end of the fourth connector. When the stroller is in the unfolded state, the third connector and the fourth connector extend in the left and right directions, respectively. When the stroller is in the folded state, the third connector and the fourth connector extend in the up and down directions, respectively.

6. The stroller according to claim 5, characterized in that: Each set of side supports includes a tie rod, one end of which is rotatably connected to the rear support rod on the same side, and the other end of which is rotatably connected to the third or fourth connector on the same side.

7. The stroller according to claim 1, characterized in that: The horizontal support includes a seat assembly, which includes a backrest, a first connecting plate, and a second connecting plate. The first connecting plate is rotatably connected to one side of the side support, and the second connecting plate is rotatably connected to the other side of the side support. The first connecting plate and the backrest are slidably connected, and the second connecting plate is also slidably connected. When the stroller is in the unfolded state, the first connecting plate and the second connecting plate are located on the left and right sides of the backrest. When the stroller is in the folded state, the first connecting plate and the second connecting plate move closer to each other in the left-right direction, and the first connecting plate and the second connecting plate are folded together on one side of the thickness direction of the backrest.

8. The stroller according to claim 7, characterized in that: Each set of side supports includes a seat rod and a sliding member. When the stroller is in the unfolded state, in each set of side supports, the sliding member and the side rod are rotatably connected relative to each other, the rear part of the seat rod is rotatably connected relative to the first connecting rod, and the seat rod is slidably connected to the sliding member. The first connecting plate is rotatably connected relative to the sliding member on one side, and the second connecting plate is rotatably connected relative to the sliding member on the other side.

9. The stroller according to claim 7, characterized in that: The first connecting plate has at least one first protrusion and at least one first groove. Along the left-right direction, the first protrusion protrudes towards the second connecting plate, and the first groove is recessed away from the second connecting plate. The second connecting plate has at least one second protrusion and at least one second groove. Along the left-right direction, the second protrusion protrudes towards the first connecting plate, and the second groove is recessed away from the first connecting plate. When the stroller is in the unfolded state, the first connecting plate and the second connecting plate are spaced apart along the left-right direction. When the stroller is in the folded state, the first protrusion engages with the second groove, and the second protrusion engages with the first groove.

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