CN116001899B - Child cart - Google Patents

Abstract

The invention discloses a child stroller, which comprises two groups of side brackets arranged on the left side and the right side, and a connecting bracket connected between the two groups of side brackets. Each group of side supports comprises a front support rod and a rear support rod, and each connecting support comprises a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod and a connecting seat. One end part of the first connecting rod is rotationally connected with the front support rod on one side, and the other end part of the first connecting rod is rotationally connected with the connecting seat; one end part of the second connecting rod is rotationally connected with the front support rod on the other side, and the other end part of the second connecting rod is rotationally connected with the connecting seat; one end part of the third connecting rod is rotationally connected with the rear supporting rod on one side, and the other end part of the third connecting rod is rotationally connected with the connecting seat; one end part of the fourth connecting rod is rotationally connected with the rear supporting rod on the other side, and the other end part of the fourth connecting rod is rotationally connected with the connecting seat. The child stroller can conveniently and rapidly link the two side brackets to unfold or fold, and the front support rod and the rear support rod after folding are folded towards the middle connecting seat, so that the child stroller has compact folding structure and smaller volume.

Description

Strollers

Technical Field

The invention relates to the field of children's products, in particular to a children's stroller.

Background Art

There are various structures of strollers on the market, and their rods are usually able to move relative to each other and fold together to achieve folding of the entire stroller for easy storage and storage. In order to obtain a smaller folded volume, some strollers can be folded horizontally, and their length, height and width after folding are significantly reduced. However, most of the existing strollers that can be folded horizontally need to be equipped with more horizontal rods and rotating shafts at different positions of the two side brackets, resulting in a more complex structure of the entire stroller, and the rigidity and stability of the stroller when unfolded are poor. When the stroller is folded, it is also easy to have local jamming and stagnation, which affects the user experience.

Summary of the invention

The purpose of the present invention is to provide a baby stroller with a novel structure and a small folding volume in view of the problems existing in the prior art.

In order to achieve the above object, the technical solution adopted by the present invention is:

A baby stroller, having an unfolded state and a folded state, the baby stroller comprising two groups of side brackets respectively arranged on left and right sides, and a connecting bracket connected between the two groups of the side brackets, each group of the side brackets comprising a front support rod and a rear support rod, the connecting bracket comprising a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod and a connecting seat, wherein one end of the first connecting rod is rotatably connected to the front support rod on one side, and the other end of the first connecting rod is rotatably connected to the connecting seat; one end of the second connecting rod is rotatably connected to the front support rod on the other side, and the other end of the second connecting rod is rotatably connected to the connecting seat; one end of the third connecting rod is rotatably connected to the rear support rod on one side, and the other end of the third connecting rod is rotatably connected to the connecting seat. The end portion is rotatably connected to the connecting seat; one end portion of the fourth connecting rod is rotatably connected to the rear support rod on the other side, and the other end portion of the fourth connecting rod is rotatably connected to the connecting seat; when the child stroller is in the unfolded state, along the left and right directions, the connecting seat is located between the two groups of the side brackets, and the first connecting rod, the second connecting rod, the third connecting rod, and the fourth connecting rod are respectively extended in an inclined manner along the front and rear directions; when the child stroller is converted from the unfolded state to the folded state, the connecting seat moves upward; when the child stroller is in the folded state, the first connecting rod, the second connecting rod, the third connecting rod, and the fourth connecting rod are respectively extended in the up and down directions, and the two groups of the side brackets are close to each other along the left and right directions.

In some embodiments, when the child stroller is in the unfolded state, the first link and the second link are located on the front side of the connecting seat, the third link and the fourth link are located on the rear side of the connecting seat, and along the left and right directions, the first link, the second link, the third link, and the fourth link respectively extend gradually from the outside to the inside toward the connecting seat.

In some embodiments, when the child stroller is in an unfolded state, the first link, the second link, the third link, and the fourth link are spaced apart along the circumference of the connecting seat.

In some embodiments, when the stroller is in the unfolded state, the center line of the connecting seat extends in the up and down direction, the first connecting rod is rotatably connected to the connecting seat around a first axis, the second connecting rod is rotatably connected to the connecting seat around a second axis, the third connecting rod is rotatably connected to the connecting seat around a third axis, and the fourth connecting rod is rotatably connected to the connecting seat around a fourth axis, and the extension directions of the first axis, the second axis, the third axis, and the fourth axis are respectively perpendicular to the center line of the connecting seat.

In some embodiments, each of the front support rods has a front connecting portion, and each of the rear support rods has a rear connecting portion, each of the front connecting portion and each of the rear connecting portion protrudes toward the connecting seat, the first connecting rod and the second connecting rod are respectively rotatably connected to the front connecting portion on the same side, and the third connecting rod and the fourth connecting rod are respectively rotatably connected to the rear connecting portion on the same side; the first connecting rod is rotatably connected to the front connecting portion on one side around a fifth axis, and the fifth axis is parallel to the first axis; the second connecting rod is rotatably connected to the front connecting portion on the other side around a sixth axis, and the sixth axis is parallel to the second axis; the third connecting rod is rotatably connected to the rear connecting portion on one side around a seventh axis, and the seventh axis is parallel to the third axis; the fourth connecting rod is rotatably connected to the rear connecting portion on the other side around an eighth axis, and the eighth axis is parallel to the fourth axis.

In some embodiments, when the stroller is in the unfolded state, each group of the side supports further includes: a first support rod, wherein two of the lower portion of the first support rod, the upper portion of the rear support rod, and the upper portion of the front support rod are rotatably connected, and the third is rotatably connected to at least one of the first two; a push rod, wherein the push rod is rotatably connected to the first support rod; a second support rod, wherein the upper portion of the second support rod is rotatably connected to the push rod, and the lower portion of the second support rod is rotatably connected to the rear support; a pull rod, wherein one end portion of the pull rod is rotatably connected to the second support rod, and the third connecting rod and the fourth connecting rod are respectively rotatably connected to the other end portion of the pull rod on the same side.

In some embodiments, when the child stroller is in the unfolded state, each of the pull rods extends gradually and tilted inward from top to bottom along the left-right direction.

In some embodiments, each group of the side brackets further includes a seat rod and a sliding member, one end of the seat rod is rotatably connected to the second support rod, the sliding member is rotatably connected to the first support rod, the seat rod can be connected to the sliding member in a relatively slidable manner along its own axial direction, and when the child stroller is in the unfolded state, the sliding member is located on the front side of the second support rod.

In some embodiments, the connecting bracket also includes a seat assembly, and the seat assembly includes a first seat link, a second seat link, a third seat link and a fourth seat link, wherein one end of the first seat link is rotatably connected to the seat link on one side, one end of the second seat link is rotatably connected to the seat link on the other side, and the other end of the first seat link is rotatably connected to the other end of the second seat link; one end of the third seat link is rotatably connected to the sliding member on one side, one end of the fourth seat link is rotatably connected to the sliding member on the other side, and the other end of the third seat link is rotatably connected to the other end of the fourth seat link; in the left-right direction, the first seat link and the third seat link are located on the same side, the first seat link is rotatably connected to the third seat link, the second seat link and the fourth seat link are located on the other side, and the second seat link is rotatably connected to the fourth seat link.

In some embodiments, when the child stroller is in the unfolded state, the rotation connection between the first seat link and the seat rod is located behind the sliding member, and the rotation connection between the second seat link and the seat rod is located behind the sliding member; when the child stroller is in the unfolded state, the rotation centerline of the first seat link and the seat rod, the rotation centerline of the second seat link and the seat rod, the rotation centerline of the first seat link and the second seat link, the rotation centerline of the third seat link and the sliding member, the rotation centerline of the fourth seat link and the sliding member, the rotation centerline of the third seat link and the fourth seat link, the rotation centerline of the first seat link and the third seat link, and the rotation centerline of the second seat link and the fourth seat link are parallel to each other and extend in the up and down directions respectively.

Due to the application of the above technical solution, the child stroller provided by the present invention has a simple connecting bracket structure, which can conveniently and quickly link the front support rods and the rear support rods on both sides to expand or fold. The rigid rod structure in the connecting bracket is stable and reliable, and the movement is flexible. After folding, the front support rods and the rear support rods are both folded toward the middle connecting seat, so that the folding structure of the child stroller is compact and the volume is smaller.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for describing the embodiments.

FIG1 is a perspective view of a child stroller in an unfolded state according to a specific embodiment of the present invention;

FIG2 is a schematic side view of the child stroller in the unfolded state according to the present embodiment;

FIG3 is a three-dimensional schematic diagram of the child stroller in the unfolded state in this embodiment from another angle;

FIG4 is a schematic top view of the child stroller in the unfolded state according to the present embodiment;

FIG5 is a three-dimensional schematic diagram of the child stroller in the folding process of this embodiment;

Figure 6 is an enlarged schematic diagram of point A in Figure 5;

FIG. 7 is a side view of the child stroller in the folding process according to the present embodiment;

FIG8 is a three-dimensional schematic diagram of the child stroller in the folded state according to the present embodiment;

FIG9 is a side view of the child stroller in the folded state according to the present embodiment;

Wherein: 100, side bracket; 110, front support rod; 111, front connecting part; 120, rear support rod; 121, rear connecting part; 122, upper extension part; 130, first support rod; 140, push rod; 141, lower extension part; 150, second support rod; 151, rear extension part; 160, pull rod; 170, seat rod; 180, sliding member;

200, connecting bracket; 201, connecting part; 210, first connecting rod; 220, second connecting rod; 230, third connecting rod; 240, fourth connecting rod; 250, connecting seat; 251, connecting port; 260, seat assembly; 261, first seat connecting rod; 262, second seat connecting rod; 263, third seat connecting rod; 264, fourth seat connecting rod; 270, grip rod; 271, grip rod seat; 280, grip rod;

310. Front wheel assembly; 320. Rear wheel assembly; 1001. First axis; 1002. Second axis; 1003. Third axis; 1004. Fourth axis; 1005. Fifth axis; 1006. Sixth axis; 1007. Seventh axis; 1008. Eighth axis; 1009. Center line.

DETAILED DESCRIPTION

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.

In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "left-right direction", "height direction", "front-back direction" and the like indicate directions or positional relationships based on FIG. 1 , which are directions or positional relationships observed by a child when the child normally rides in the stroller. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, have only a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

1 to 4 , a child stroller with an unfolded state and a folded state includes two sets of side brackets 100 respectively arranged on the left and right sides, and a connecting bracket 200 connected between the two sets of side brackets 100. In this embodiment, the two sets of side brackets 100 are arranged symmetrically, and each set of side brackets 100 includes a front support rod 110, a rear support rod 120, a first support rod 130, a push rod 140, a second support rod 150, a pull rod 160, a seat rod 170, a sliding member 180, etc.

Referring to FIGS. 1 to 4 , in this embodiment, when the stroller is in the unfolded state, in each set of side brackets 100, the front support rod 110 gradually extends upward from the front to the back, and the bottom of the front support rod 110 is provided with a front wheel assembly 310; the rear support rod 120 gradually extends downward from the front to the back, and the bottom of the rear support rod 120 is provided with a rear wheel assembly 320, and the upper part of the rear support rod 120 also has a section of an upper extension portion 122 extending backward and upward. The first support rod 130 gradually extends upward from the front to the back, and two of the lower part of the first support rod 130, the upper part of the rear support rod 120, and the upper part of the front support rod 110 are rotatably connected, and the third is rotatably connected to at least one of the first two. In this embodiment, specifically, the upper part of the front support rod 110 is rotatably connected to the upper part of the rear support rod 120, and the lower part of the first support rod 130 is rotatably connected to the upper part 122. Further, the push rod 140 gradually extends upward from the front to the back, and the push rod 140 is rotatably connected to the first support rod 130, specifically, the lower part of the push rod 140 is rotatably connected to the upper end of the first support rod 130, and the extension direction of the push rod 140 and the first support rod 130 is substantially parallel, and the lower part of the push rod 140 also has a lower extension part 141, and the lower extension part 141 is located below the rotation connection between the push rod 140 and the first support rod 130. The second support rod 150 gradually extends upward from the front to the back, and the lower part of the second support rod 150 has a rear extension part 151 extending backward and downward. The second support rod 150 is located at the rear side of the first support rod 130 as a whole, and the upper part of the second support rod 150 is rotatably connected to the push rod 140, specifically, it is rotatably connected to the lower extension part 141, and the lower part of the second support rod 150 is rotatably connected to the rear bracket 120, specifically, the rear extension part 151 is rotatably connected to the rear bracket 120. One end of the pull rod 160 is rotatably connected to the second support rod 150, and the other end of the pull rod 160 is rotatably connected to the connecting bracket 200. In the left-right direction, the pull rod 160 on each side gradually extends inward from top to bottom. In this embodiment, one end of the seat rod 170 is rotatably connected to the second support rod 150, and the sliding member 180 is rotatably connected to the first support rod 130. The seat rod 170 can be connected to the sliding member 180 in a relatively slidable manner along its own axis. When the child stroller is in the unfolded state, the rear end of the seat rod 170 is rotatably connected to the second support rod 150, and the sliding member 180 is located at the front side of the second support rod 150. Here, the sliding member 180 specifically adopts a sliding sleeve. It should be noted that in this embodiment, in each set of side brackets 100, the rotation axis centerline between the two components that are rotatably connected to each other extends along the left-right direction of the child stroller, and different rotation axis centerlines are parallel to each other.

As shown in FIGS. 1 to 4 , in this embodiment, a gripping rod seat 271 is provided at the top of each side push rod 140, and each gripping rod seat 271 is fixed with a gripping rod 270, which extends forward from the gripping rod seat 271, and two gripping rods 280 are rotatably connected between the two gripping rod seats 271. Specifically, one end of each gripping rod 280 is rotatably connected to the gripping rod seat 271 on the same side, and the other ends of the two gripping rods 280 are rotatably connected to each other. When the child stroller is in the unfolded state, each gripping rod 280 extends in the left-right direction, and the extension directions of the two gripping rods 280 are roughly collinear. The rotation axis center lines of the rotational connection points of the above-mentioned gripping rods 280 are parallel to each other and extend in the front-back direction, and are preferably perpendicular to the extension direction of the push rod 140, so that the left-right folding of the push rods 140 on both sides can be achieved.

1 to 4, the connecting bracket 200 includes a first connecting rod 210, a second connecting rod 220, a third connecting rod 230, a fourth connecting rod 240 and a connecting seat 250. Among them, one end of the first connecting rod 210 is rotatably connected to the front support rod 110 on one side, and the other end of the first connecting rod 210 is rotatably connected to the connecting seat 250; one end of the second connecting rod 220 is rotatably connected to the front support rod 110 on the other side, and the other end of the second connecting rod 220 is rotatably connected to the connecting seat 250; one end of the third connecting rod 230 is rotatably connected to the rear support rod 120 on one side, and the other end of the third connecting rod 230 is rotatably connected to the connecting seat 250; one end of the fourth connecting rod 240 is rotatably connected to the rear support rod 120 on the other side, and the other end of the fourth connecting rod 240 is rotatably connected to the connecting seat 250. When the stroller is in the unfolded state, the connecting seat 250 is located between the two sets of side brackets 100 in the left-right direction, and the first connecting rod 210, the second connecting rod 220, the third connecting rod 230, and the fourth connecting rod 240 extend obliquely in the front-back direction respectively.

In this embodiment, the connection seat 250 is specifically located in the middle of the entire connection bracket 200. When the child stroller is in the unfolded state, the first link 210 and the second link 220 are located at the front side of the connection seat 250, and the third link 230 and the fourth link 240 are located at the rear side of the connection seat 250; along the left-right direction, the first link 210 and the third link 230 are located on the same side of the connection seat 250 (defined as the right side here), and the second link 220 and the fourth link 240 are located on the other side of the connection seat 250 (defined as the left side here). Along the left-right direction, the first link 210, the second link 220, the third link 230, and the fourth link 240 extend obliquely from the outside to the inside gradually toward the connection seat 250, and the first link 210, the second link 220, the third link 230, and the fourth link 240 are spaced and arranged in sequence along the circumference of the connection seat 250.

Referring to FIGS. 1 to 4 , in this embodiment, each front support rod 110 has a front connecting portion 111, and each rear support rod 120 has a rear connecting portion 121, and each front connecting portion 111 and each rear connecting portion 121 are protruded toward the middle connecting seat 250. The first connecting rod 210 and the second connecting rod 220 are respectively rotatably connected to the front connecting portion 111 on the same side, and the third connecting rod 230 and the fourth connecting rod 240 are respectively rotatably connected to the rear connecting portion 121 on the same side. In this embodiment, the protruding direction of each front connecting portion 111 and each rear connecting portion 121 is roughly the same as the length extension direction of the corresponding first connecting rod 210, the second connecting rod 220, the third connecting rod 230 or the fourth connecting rod 240, and the front connecting portion 111 and the rear connecting portion 121 are both arranged at the lower end of the corresponding front support rod 110 or the rear support rod 120, so that the connecting seat 250 and the like have a height as low as possible and stronger stability.

5 and 6, in this embodiment, the connection seat 250 is in the shape of a disk as a whole. When the stroller is in the unfolded state, the center line 1009 of the connection seat 250 extends in the up-down direction, and the center line 1009 specifically extends from top to bottom and slightly tilted forward. The lower part of the connection seat 250 has four connection ports 251, which are arranged at intervals along the circumference of the connection seat 250 and correspond to one end of the first connecting rod 210, the second connecting rod 220, the third connecting rod 230 and the fourth connecting rod 240 connected to the connection seat 250. In this embodiment, the length extension directions of the first connecting rod 210, the second connecting rod 220, the third connecting rod 230, and the fourth connecting rod 240 are respectively perpendicular to the center line 1009, the first connecting rod 210 and the connecting seat 250 are rotationally connected around the first axis 1001, the second connecting rod 220 and the connecting seat 250 are rotationally connected around the second axis 1002, the third connecting rod 230 and the connecting seat 250 are rotationally connected around the third axis 1003, and the fourth connecting rod 240 and the connecting seat 250 are rotationally connected around the fourth axis 1004. The extension directions of the above-mentioned first axis 1001, the second axis 1002, the third axis 1003, and the fourth axis 1004 are respectively perpendicular to the center line 1009 of the connecting seat 250, and are also respectively perpendicular to the length extension directions of the corresponding first connecting rod 210, the second connecting rod 220, the third connecting rod 230 or the fourth connecting rod 240. In this embodiment, the first axis 1001 is roughly parallel to the third axis 1003, the second axis 1002 is roughly parallel to the fourth axis 1004, and the angle between any two adjacent axes of the first axis 1001, the second axis 1002, the third axis 1003, and the fourth axis 1004 is approximately 90°, so that the connection positions of the first connecting rod 210, the second connecting rod 220, the third connecting rod 230, and the fourth connecting rod 240 are evenly spaced, and no interference occurs during relative rotation. On the other hand, the first link 210 is rotationally connected to the front connecting portion 111 on one side around the fifth axis 1005, and the fifth axis 1005 is parallel to the first axis 1001; the second link 220 is rotationally connected to the front connecting portion 111 on the other side around the sixth axis 1006, and the sixth axis 1006 is parallel to the second axis 1002; the third link 230 is rotationally connected to the rear connecting portion 121 on one side around the seventh axis 1007, and the seventh axis 1007 is parallel to the third axis 1003; the fourth link 240 is rotationally connected to the rear connecting portion 121 on the other side around the eighth axis 1008, and the eighth axis 1008 is parallel to the fourth axis 1004. In this way, when the connecting seat 250 moves in the up and down direction, it can simultaneously drive one end of the first connecting rod 210, the second connecting rod 220, the third connecting rod 230 and the fourth connecting rod 240 to move upward and rotate, and at the same time, the other end of each connecting rod is driven to rotate relative to the side bracket 100 and retract inward.

As shown in FIGS. 1 to 4 , in this embodiment, the third connecting rod 230 and the fourth connecting rod 240 are respectively rotatably connected to the other end of the pull rod 160 on the same side. Specifically, the rear portions of the third connecting rod 230 and the fourth connecting rod 240 respectively have connecting portions 201, and the connecting portions 201 are relatively located on the outside in the left-right direction. In each set of side brackets 100, the lower end of the pull rod 160 is rotatably connected to the connecting portion 201 on the same side, and the extension direction of the rotation axis between the two is roughly parallel to the extension direction of the corresponding third connecting rod 230 or fourth connecting rod 240. In this way, when the side brackets 100 on both sides are folded and folded, the connecting brackets 200 can be linked through the pull rod 160.

3 and 4, in this embodiment, the connecting bracket 200 further includes a seat assembly 260, and the seat assembly 260 includes a first seat link 261, a second seat link 262, a third seat link 263, and a fourth seat link 264. Among them, one end of the first seat link 261 is rotatably connected to the seat rod 170 on one side, one end of the second seat link 262 is rotatably connected to the seat rod 170 on the other side, and the other end of the first seat link 261 is rotatably connected to the other end of the second seat link 262; one end of the third seat link 263 is rotatably connected to the sliding member 180 on one side, one end of the fourth seat link 264 is rotatably connected to the sliding member 180 on the other side, and the other end of the third seat link 263 is rotatably connected to the other end of the fourth seat link 264. In the left-right direction, the first seat link 261 and the third seat link 263 are located on the same side, specifically the right side, and the first seat link 261 and the third seat link 263 are rotatably connected; the second seat link 262 and the fourth seat link 264 are located on the other side, specifically the left side, and the second seat link 262 and the fourth seat link 264 are rotatably connected. When the child stroller is in the unfolded state, the rotatable connection between the first seat link 261 and the seat rod 170 is located behind the sliding member 180, and the rotatable connection between the second seat link 262 and the seat rod 170 is located behind the sliding member 180. In this embodiment, the first seat link 261 and the second seat link 262 are rotatably connected to the rear end of the seat rod 170 on the same side. The rotation center line of the first seat link 261 and the seat post 170, the rotation center line of the second seat link 262 and the seat post 170, the rotation center line of the first seat link 261 and the second seat link 262, the rotation center line of the third seat link 263 and the sliding member 180, the rotation center line of the fourth seat link 264 and the sliding member 180, the rotation center line of the third seat link 263 and the fourth seat link 264, the rotation center line of the first seat link 261 and the third seat link 263, the rotation center line of the second seat link 262 and the fourth seat link 264, etc. involved in the seat assembly 260 are parallel to each other and extend in the vertical direction respectively. In this way, when the sliding member 180 slides along the seat post 170, the entire seat assembly 260 can be linked to be folded or unfolded left and right.

Referring to FIGS. 5 to 7 , in this embodiment, when the stroller is converted from the unfolded state to the folded state, the push rods 140 on both sides are first driven to move downward synchronously, thereby driving the first support rod 130 and the second support rod 150 to flip backward and downward, so that the push rod 140, the first support rod 130 and the second support rod 150 are all retracted toward the rear support rod 120. Further, the rear end of the seat rod 170 moves downward along with the second support rod 150, and the seat rod 170 gradually rotates to extend in the up-down direction and retracts with the first support rod 130 and the second support rod 150; and because the distance between the first support rod 130 and the second support rod 150 increases, the sliding member 180 slides upward along the seat rod 170. During the above process, since the sliding member 180 on each side gradually moves away from the rear end of the seat rod 170, the right end of the third seat link 263 connected to the sliding member 180 in the seat assembly 260 is driven to gradually move away from the right end of the first seat link 261 along the axial direction of the seat rod 170. Similarly, the left end of the fourth seat link 264 gradually moves away from the left end of the second seat link 262 along the axial direction of the seat rod 170. At the same time, the first seat link 261 and the second seat link 262, the third seat link 263 and the fourth seat link 264 rotate close to each other, and the seat assembly 260 is folded in the left and right directions.

On the other hand, the rotation of the second support rod 150 drives the pull rod 160 to move upward as a whole, thereby pulling the third link 230 and the fourth link 240 on both sides upward, driving the connecting seat 250 to move upward, and then causing the first link 210 and one end of the second link 220 to rotate upward synchronously. The first link 210, the second link 220, the third link 230, and the fourth link 240 are all folded toward the central connecting seat 250, and then react to the side brackets 100 on both sides, so that the two groups of side brackets 100 are folded forward and backward and also move closer to each other left and right.

During the above folding process, as the two sets of side brackets 100 move closer to the left and right, the two grip links 280 also synchronously complete the left and right folding: the rotating connection of the two grip links 280 moves downward, and the two grip links 280 gradually convert to extend in the up and down directions and move closer to each other, thereby tightening the distance between the grip rods 270 on both sides.

As shown in Fig. 8 and Fig. 9, in this embodiment, when the child stroller is in the folded state, the first connecting rod 210, the second connecting rod 220, the third connecting rod 230, and the fourth connecting rod 240 extend in the up-down direction respectively, and the two sets of side brackets 100 approach each other in the left-right direction. Among them, the connecting seat 250 rises, and the grip rod 270 falls, and the two are approximately at the same height; the push rod 140 is folded at the rear side of the rear support rod 120, and the rear wheel assembly 320 is folded at the outside of the front wheel assembly 310. The bottom of the rear wheel assembly 320, the front wheel assembly 310 and the bottom of the lower extension 141 of the push rod 140 are approximately at the same horizontal plane, so that the child stroller can be self-standing after being folded, which is very convenient.

When the baby stroller needs to be converted from the folded state to the unfolded state, it is only necessary to reverse the above steps, which will not be described again here.

To sum up, the child stroller provided in this embodiment has a novel structure and is stable and reliable when unfolded. It can further be folded and folded quickly in a linked manner and achieve synchronous folding in height, length and width. The volume of the stroller is significantly reduced after folding, which is convenient for storage and storage and easy to use.

The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A baby stroller having an unfolded state and a folded state, the baby stroller comprising two sets of side brackets respectively arranged on the left and right sides, and a connecting bracket connected between the two sets of side brackets, each set of the side brackets comprising a front support rod and a rear support rod, characterized in that: The connecting bracket includes a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod and a connecting seat, wherein one end of the first connecting rod is rotatably connected to the front support rod on one side, and the other end of the first connecting rod is rotatably connected to the connecting seat; one end of the second connecting rod is rotatably connected to the front support rod on the other side, and the other end of the second connecting rod is rotatably connected to the connecting seat; one end of the third connecting rod is rotatably connected to the rear support rod on one side, and the other end of the third connecting rod is rotatably connected to the connecting seat; one end of the fourth connecting rod is rotatably connected to the rear support rod on the other side, and the other end of the fourth connecting rod is rotatably connected to the connecting seat; When the stroller is in an unfolded state, along the left-right direction, the connecting seat is located between the two sets of side brackets, and the first connecting rod, the second connecting rod, the third connecting rod, and the fourth connecting rod extend obliquely along the front-back direction respectively; When the baby stroller is transformed from the unfolded state to the folded state, the connecting seat moves upward; When the stroller is in a folded state, the first connecting rod, the second connecting rod, the third connecting rod, and the fourth connecting rod extend in the up-down direction respectively, and the two groups of side brackets approach each other in the left-right direction. When the stroller is in an unfolded state, the center line of the connecting seat extends in the up-down direction, the first connecting rod is connected to the connecting seat for rotation around a first axis, the second connecting rod is connected to the connecting seat for rotation around a second axis, the third connecting rod is connected to the connecting seat for rotation around a third axis, the fourth connecting rod is connected to the connecting seat for rotation around a fourth axis, and the extension directions of the first axis, the second axis, the third axis, and the fourth axis are respectively perpendicular to the center line of the connecting seat. in, Each of the front support rods has a front connecting portion, each of the rear support rods has a rear connecting portion, the first connecting rod and the second connecting rod are respectively rotatably connected to the front connecting portion on the same side, and the third connecting rod and the fourth connecting rod are respectively rotatably connected to the rear connecting portion on the same side; The first connecting rod is rotatably connected to the front connecting portion on one side around a fifth axis, and the fifth axis is parallel to the first axis; The second connecting rod is rotatably connected to the front connecting portion on the other side around a sixth axis, and the sixth axis is parallel to the second axis; The third connecting rod is rotatably connected to the rear connecting portion on one side around a seventh axis, and the seventh axis is parallel to the third axis; The fourth connecting rod is rotatably connected to the rear connecting portion on the other side around an eighth axis, and the eighth axis is parallel to the fourth axis. 2. The stroller according to claim 1 is characterized in that: when the stroller is in the unfolded state, the first link and the second link are located on the front side of the connecting seat, the third link and the fourth link are located on the rear side of the connecting seat, and along the left and right directions, the first link, the second link, the third link, and the fourth link extend gradually from the outside to the inside toward the connecting seat. 3. The stroller according to claim 1, characterized in that when the stroller is in an unfolded state, the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod are arranged at intervals along the circumference of the connecting seat. 4 . The stroller according to claim 1 , wherein each of the front connecting portions and each of the rear connecting portions protrudes toward the connecting seat. 5. The stroller according to claim 1, characterized in that when the stroller is in an unfolded state, each set of the side brackets further comprises: A first support rod, wherein two of the lower portion of the first support rod, the upper portion of the rear support rod, and the upper portion of the front support rod are rotatably connected, and the third is rotatably connected to at least one of the first two; A push rod, the push rod being rotatably connected to the first support rod; a second support rod, wherein the upper portion of the second support rod is rotatably connected to the push rod, and the lower portion of the second support rod is rotatably connected to the rear support rod; A pull rod, one end of which is rotatably connected to the second support rod, and the third connecting rod and the fourth connecting rod are respectively rotatably connected to the other end of the pull rod on the same side. 6. The stroller according to claim 5, characterized in that when the stroller is in the unfolded state, each of the pull rods extends gradually inwardly from top to bottom in the left-right direction. 7. The stroller according to claim 5 is characterized in that: each group of the side brackets also includes a seat rod and a sliding member, one end of the seat rod is rotatably connected to the second support rod, the sliding member is rotatably connected to the first support rod, the seat rod can be connected to the sliding member in a relatively slidable manner along its own axial direction, and when the stroller is in the unfolded state, the sliding member is located on the front side of the second support rod. 8. The stroller according to claim 7, characterized in that: the connecting bracket further comprises a seat assembly, the seat assembly comprises a first seat link, a second seat link, a third seat link and a fourth seat link, wherein: One end of the first seat link is rotatably connected to the seat post on one side, one end of the second seat link is rotatably connected to the seat post on the other side, and the other end of the first seat link is rotatably connected to the other end of the second seat link; One end of the third seat link is rotatably connected to the sliding member on one side, one end of the fourth seat link is rotatably connected to the sliding member on the other side, and the other end of the third seat link is rotatably connected to the other end of the fourth seat link; In the left-right direction, the first seat link and the third seat link are located on the same side, and are rotationally connected to the third seat link; the second seat link and the fourth seat link are located on the other side, and are rotationally connected to the fourth seat link. 9. The stroller according to claim 8, characterized in that: when the stroller is in the unfolded state, the rotation connection between the first seat link and the seat rod is located behind the sliding member, and the rotation connection between the second seat link and the seat rod is located behind the sliding member; when the stroller is in the unfolded state, the rotation center line of the first seat link and the seat rod, the rotation center line of the second seat link and the seat rod, the rotation center line of the first seat link and the second seat link, the rotation center line of the third seat link and the sliding member, the rotation center line of the fourth seat link and the sliding member, the rotation center line of the third seat link and the fourth seat link, the rotation center line of the first seat link and the third seat link, and the rotation center line of the second seat link and the fourth seat link are parallel to each other and extend in the up and down directions respectively.