CN113511250A

CN113511250A - Children's barrow

Info

Publication number: CN113511250A
Application number: CN202110804139.1A
Authority: CN
Inventors: 李丰
Original assignee: Goodbaby Child Products Co Ltd
Current assignee: Goodbaby Child Products Co Ltd
Priority date: 2021-07-16
Filing date: 2021-07-16
Publication date: 2021-10-19
Anticipated expiration: 2041-07-16
Also published as: CN113511250B

Abstract

The invention discloses a children's stroller, comprising a stroller frame and a first wheel assembly arranged at the bottom of the stroller frame. A connecting rod between wheel assemblies, one end of the connecting rod is universally connected with the movable rod, and the other end of the connecting rod is rotatably connected with the first wheel assembly. When the cart frame is folded, the movable rod moves through the connecting rod. The first wheel assembly is driven to turn over the inner side of the cart frame around the first axis, the first axis extending in the front-rear direction. When the stroller frame is folded, the first wheel assembly can be driven to turn to the inner side of the stroller frame only through the connecting rod, so that the stroller has a simple structure, convenient folding operation, low manufacturing cost, and After the children's stroller is folded, the first wheel assembly can be close to the frame of the stroller, so that the folded children's stroller has a compact structure, a small volume, and is easy to carry and store.

Description

Children's barrow

Technical Field

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

Background

The children's barrow provides great convenience for adults to carry smaller children for outdoor activities. In order to facilitate the carrying and storage of the stroller, the stroller can be folded generally.

In the prior art, when a part of the stroller is folded, only the stroller frame is folded, and the wheel assembly and the connected stroller frame do not move relatively, so that the folded stroller has a larger structural volume.

When the wheel assembly of part of the children stroller is folded, the wheel assembly can also rotate relative to the connected stroller frame so as to be folded. But the structure of the driving mechanism for driving the wheel assemblies to be synchronously folded when the frame of the stroller is folded is complex, so that the structure of the stroller is large in volume and high in manufacturing cost.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a stroller, wherein when a stroller frame is folded, a first wheel assembly can be driven to turn towards the inner side of the stroller only through a connecting rod.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a children's shallow, is in including having the shallow frame of expansion and fold condition, setting the first wheel subassembly of the bottom of shallow frame, the shallow frame includes the movable rod that can move when the shallow frame is folded, children's shallow is still including setting up the movable rod with connecting rod between the first wheel subassembly, a tip of connecting rod with the universal rotation of movable rod is connected, another tip of connecting rod with the rotation of first wheel subassembly is connected, works as when the shallow frame is folded, the movable rod motion, through the connecting rod orders about first wheel subassembly is around the primary shaft the inboard upset of shallow frame, the primary shaft extends along the fore-and-aft direction.

Preferably, one end portion of the link is rotatably connected to the stroller frame via a ball joint, and the other end portion of the link is rotatably connected to the first wheel assembly via a second shaft extending obliquely in the left-right direction.

Further, the movable rod is a rear support of the stroller frame, the first wheel assembly is a rear wheel assembly, the connecting rod is located behind the rear support, the front end portion of the connecting rod is rotatably connected with the lower end portion of the rear support through the spherical joint, the rear end portion of the connecting rod is rotatably connected with the rear wheel assembly through the second shaft, and the second shaft is inclined and extended backward from the outer side of the stroller frame to the inner side in the left-right direction.

Furthermore, the rear wheel subassembly sets up respectively the left and right sides of children's shallow, the connecting rod is provided with two, every the connecting rod all is connected the after-poppet with correspond one side between the rear wheel subassembly, every the connecting rod all extends to the slope of the outside of children's shallow from the anteroposterior.

Further, the movable rod is a front support of the stroller frame, the first wheel assembly is a front wheel assembly, the connecting rod is located in front of the front support, the rear end of the connecting rod is rotatably connected with the lower end of the front support through the spherical joint, the front end of the connecting rod is rotatably connected with the front wheel assembly through the second shaft, and the second shaft is inclined forwards and extends forwards from the outer side to the inner side of the stroller frame along the left-right direction.

Furthermore, the front wheel assemblies are respectively arranged on the left side and the right side of the baby stroller, two connecting rods are arranged, each connecting rod is connected to the front support and the front wheel assembly on the corresponding side, and each connecting rod extends obliquely from the rear direction to the front direction to the outer side of the baby stroller.

Preferably, the stroller further includes a second wheel assembly located in front of or behind the first wheel assembly and a connecting shaft extending in a front-rear direction, two ends of the connecting shaft are respectively connected to the first wheel assembly and the second wheel assembly, and when the stroller frame is folded to drive the first wheel assembly to turn around the first axis inside the stroller frame, the second wheel assembly is driven to turn around the first axis inside the stroller frame synchronously.

Furthermore, the first wheel assembly is connected with the connecting shaft in a rotating mode through a third shaft, the third shaft extends in the left-right direction, and the second wheel assembly is fixedly connected with the connecting shaft.

Further, when the stroller is in the unfolded state, the wheel axle of the first wheel assembly and the wheel axle of the second wheel assembly both extend in the horizontal direction, and when the stroller is in the folded state, the wheel axle of the first wheel assembly and the wheel axle of the second wheel assembly both extend in the up-down direction.

Preferably, the cart frame comprises a front bracket, a rear bracket, a push rod assembly and a bottom rod assembly, the upper part of the front bracket is rotatably connected with the lower part of the push rod assembly, the lower part of the front bracket is rotationally connected with the bottom rod assembly, the upper part of the rear bracket is rotationally connected with the lower part of the push rod assembly, the lower part of the rear bracket is rotationally connected with the bottom rod assembly, the child stroller also comprises a second wheel assembly arranged at the bottom of the stroller frame and a connecting shaft connected between the first wheel assembly and the second wheel assembly, the bottom rod assembly comprises a bottom rod extending along the front-back direction, the bottom rod is sleeved outside the connecting shaft and matched with the connecting shaft, the connecting shaft can be rotationally arranged in the bottom rod around the first shaft, and the movable rod is the front support or the rear support.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: when the stroller frame is folded, the first wheel assembly can be driven to turn towards the inner side of the stroller frame through the connection mode of the connecting rod and the movable rod when the movable rod moves, so that the stroller is simple in structure, convenient to fold and operate and low in manufacturing cost; and the connecting rod orders about first wheel subassembly pivoted direction of rotation for the direction of drawing close to the shallow frame for first wheel subassembly can closely draw close together with the shallow frame after the children's shallow is folding, makes the children's shallow compact structure after folding, and is small, portable and deposit.

Drawings

Fig. 1 is a perspective view of the stroller of this embodiment 1 in a deployed state;

fig. 2 is a schematic side view of the stroller of this embodiment 1 in a deployed state (a cross-sectional view of the bottom bar assembly);

fig. 3 is a schematic side view of the stroller of this embodiment 1 in a deployed state (a cross-sectional view of a connecting position between the connecting rod and the fixing seat is schematic);

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

fig. 5 is a schematic top view of the stroller of this embodiment 1 in a deployed state;

fig. 6 is a side view of the stroller of this embodiment 1 during folding (with the backrest rotated forward);

FIG. 7 is a schematic side view of the stroller of this embodiment 1 during folding (with the push-up rod sliding downward);

FIG. 8 is a schematic side view of the stroller of this embodiment 1 during folding (with the push rod assembly rotated forward);

fig. 9 is a perspective view of the stroller of this embodiment 1 during folding (with the push rod assembly rotated forward and downward);

FIG. 10 is a rear view of the FIG. 9 condition;

FIG. 11 is a side view of the FIG. 9 condition;

FIG. 12 is a side view of the stroller of this embodiment 1 in a folded position;

fig. 13 is a schematic structural view of a wheel assembly of the stroller of embodiment 1;

fig. 14 is a schematic structural view of a bottom bar assembly of the stroller of this embodiment;

fig. 15 is a schematic structural view of a rear bracket of the stroller of embodiment 1;

fig. 16 is a schematic structural view of a link of the stroller of embodiment 1.

Wherein: 11. a front bracket; 111. a front support rod; 112. a front cross bar; 12. a rear bracket; 121. a rear support rod; 122. a rear cross bar; 13. a push rod assembly; 131. a lower push rod; 132. a push rod is arranged; 14. a bottom bar assembly; 141. a bottom bar; 142. a transverse stay bar; 123. a fixed seat; 123a, a spherical inner hole; 21. a front wheel assembly; 22. a rear wheel assembly; 23. a connecting shaft; 31. a first shaft; 32. a second shaft; 33. a third axis; 4. a connecting rod; 41. a ball joint; 51. a seat portion; 52. a backrest part.

Detailed Description

The technical solution of the present invention is further explained with reference to the drawings and the specific embodiments.

Example 1

As shown in fig. 1 to 12, the stroller of the present invention includes a stroller frame and a wheel assembly disposed at a bottom of the stroller frame.

The stroller frame includes a movable bar that rotates or slides when the stroller is folded.

The wheel assemblies include a first wheel assembly and a second wheel assembly located forward or rearward of the first wheel assembly, i.e., one of the two components of the first wheel assembly and the second wheel assembly is the front wheel assembly 21 and the other component is the rear wheel assembly 22, at least the first wheel assembly being rotatably disposed on the cart frame about a first axis 31, the first axis 31 extending in the fore-and-aft direction.

The stroller further comprises a linkage mechanism, the linkage mechanism is arranged between the movable rod and the first wheel assembly, and when the stroller frame is folded, the first wheel assembly can be driven to turn around the first shaft 31 towards the inner side of the stroller frame to be close to the stroller frame through the linkage mechanism. Like this, can realize folding linkage for children's shallow's folding convenient operation.

The linkage mechanism comprises a connecting rod 4 arranged between the movable rod and the first wheel assembly, one end of the connecting rod 4 is connected with the movable rod in a universal rotating mode, the other end of the connecting rod 4 is connected with the first wheel assembly in a rotating mode, and the rotating connection can be in universal rotating connection or directional rotating connection. When the stroller frame is folded, the movable rod moves, namely the connecting rod 4 drives the first wheel assembly to turn around the first shaft 31 towards the inner side of the stroller frame to be close to the stroller frame.

In this embodiment, one end portion of the link 4 is rotatably connected to the movable lever via a ball joint 41, the other end portion of the link 4 is rotatably connected to the first wheel assembly via a second shaft 32, and the second shaft 32 extends obliquely in the left-right direction.

Specifically, one of the two parts of the movable rod and the connecting rod 4 is provided with a spherical inner hole 123a, the spherical joint 41 is arranged on the other of the two parts of the movable rod and the connecting rod 4, the spherical inner hole 123a is matched with the spherical joint 41, the spherical joint 41 is pressed into the spherical inner hole 123a, and the spherical joint 41 can rotate universally relative to the spherical inner hole 123, as shown in fig. 3 and 4.

Of course, the two ends of the connecting rod 4 can also be rotatably connected with the movable rod and the first wheel assembly respectively through the spherical joints 41.

Preferably, the second wheel assembly is also rotatably mounted on the stroller frame about the first axis 31, and when the stroller frame is folded and the first wheel assembly is driven to roll about the first axis 31 toward the inside of the stroller frame by the linkage mechanism, the second wheel assembly is driven to roll about the first axis 31 toward the inside of the stroller frame. Therefore, when the stroller frame is folded, the first wheel component and the second wheel component can be turned and folded at the same time, so that the folding operation of the stroller is more convenient.

Specifically, the wheel assembly further includes a link shaft 23 provided between the first wheel assembly and the second wheel assembly, the link shaft 23 extending in the front-rear direction, and both end portions thereof being connected to the first wheel assembly and the second wheel assembly, respectively.

The first wheel assembly is rotatably connected to the link shaft 23 via a third shaft 33, the third shaft 33 extends in the left-right direction, and the second wheel assembly is fixedly connected to the link shaft 23. Therefore, when the stroller is folded and the first wheel assembly and the second wheel assembly are turned towards the inner side of the stroller frame, the first wheel assembly can be rotated around the third shaft 33 relative to the connecting shaft 23, so that the first wheel assembly and the second wheel assembly are close to each other, and the folded stroller is more compact in structure and smaller in size.

A specific structure of the cart frame is given in the present embodiment, but the structure of the cart frame is not limited to the structure given in the present embodiment.

Specifically, the stroller frame includes a front bracket 11, a rear bracket 12, a push rod assembly 13, and a bottom rod assembly 14.

The upper portion of the front supporter 11 is rotatably coupled to the lower portion of the push rod assembly 13, and the lower portion of the front supporter 11 is rotatably coupled to the bottom bar assembly 14. The upper portion of the rear bracket 12 is rotatably coupled to the lower portion of the push rod assembly 13, and the lower portion of the rear bracket 12 is rotatably coupled to the bottom rod assembly 14. Thus, a four-bar linkage is formed between the front frame 11, the push rod assembly 13, the rear frame 12, and the bottom bar assembly 14.

On the bottom bar assembly 14, the rotational connection of the front bracket 11 and the bottom bar assembly 14 is located forward of the rotational connection of the rear bracket 12 and the bottom bar assembly 14.

The front bracket 11 includes front support rods 111 at left and right sides and a front cross bar 112 having both ends fixedly connected to or integrally provided with the front support rods 111 at left and right sides, respectively.

As shown in fig. 15, the rear frame 12 includes rear stays 121 located on both left and right sides and a rear cross bar 122 having both ends fixedly connected to or integrally provided with the rear stays 121 on both left and right sides, respectively.

The push rod assembly includes a lower push rod 131 and an upper push rod 132 slidably disposed on the lower push rod 131 in a length extending direction of the lower push rod 131. In this embodiment, the lower push rod 131 has a lumen extending in the longitudinal direction thereof, and the upper push rod 132 can slide in the direction of retracting into the lumen or in the direction of extending out of the lumen relative to the lower push rod 131 in the direction of longitudinal extension of the lumen.

As shown in fig. 14, the bottom bar assembly 14 includes bottom bars 141 on both left and right sides and a cross bar 142 connected between the bottom bars 141 on both left and right sides, the bottom bars 141 extending in the front-rear direction.

In this embodiment, the lower portions of the front and rear support bars 111 and 121 are rotatably coupled to the bottom bar 141, and the upper portions of the front and rear support bars 111 and 121 are rotatably coupled to the lower portion of the lower push bar 131.

In this embodiment, the first shaft 31 is the connecting shaft 23, the bottom rod 141 has a lumen extending along the length direction thereof, the lumen is matched with the connecting shaft 23, and the connecting shaft 23 is inserted into the lumen of the bottom rod 141 and can be rotatably disposed around its own axis relative to the bottom rod assembly 14.

In this embodiment, the movable lever is the rear bracket 12 and the first wheel assembly is located rearward of the second wheel assembly, i.e., the first wheel assembly is the rear wheel assembly 22 and the second wheel assembly is the front wheel assembly 21. The link 4 is disposed between the rear bracket 12 and the rear wheel assembly 22.

Specifically, when the stroller is unfolded, the link 4 is located behind the rear bracket 12. The rear wheel assemblies 22 are respectively arranged on the left side and the right side of the stroller, two connecting rods 4 are arranged, the front end portion of each connecting rod 4 is rotatably connected with the lower end portion of the rear support 12 through a spherical joint 41, the universal rotating connection portion of each connecting rod 4 and the rear support 12 and the rotating connection portion of the push rod assembly 13 and the rear support 12 are respectively located on two opposite sides of the rotating connection portion of the rear support 12 and the bottom rod assembly 14, the rear end portion of each connecting rod 4 is rotatably connected with the rear wheel assembly 22 on one corresponding side through a second shaft 32, and the second shaft 32 is inclined backwards and extends from the outer side to the inner side of the stroller frame in the left-right direction. The rear wheel assembly 22 is rotatably connected with the connecting shaft 23 through a third shaft 33, and the front wheel assembly 21 is fixedly connected with the connecting shaft 23. As shown in fig. 1 to 9.

In this embodiment, the rear cross bar 122 is fixedly provided with a fixing seat 123, a spherical inner hole 123a is provided on the fixing seat 123, and the spherical joint 41 is provided on the connecting rod 4, as shown in fig. 3, 4, 15 and 16.

The stroller also includes a seat assembly disposed on the stroller frame, the seat assembly including a seat portion 51 and a back portion 52. In order to fold the stroller with the seat assembly, so that the folding operation of the stroller is more convenient, the backrest portion 52 is rotatably connected with the seat portion 51, and the seat assembly is integrally rotatably connected with the stroller frame. In this embodiment, the seat 51, the backrest 52, the lower part of the push-down lever 131, and the upper part of the front frame 11 are coaxially and rotatably connected.

When the stroller is in the unfolded state, most of the upper push rod 132 extends out of the tube cavity of the lower push rod 131, the two connecting rods 4 are located behind the rear bracket 12, each connecting rod 4 extends obliquely from front to rear to the outer side of the stroller, the wheel axle of the front wheel assembly 21 and the wheel axle of the rear wheel assembly 22 both extend in the horizontal direction and in the left-right direction, and the distance between the wheel axle of the front wheel assembly 21 and the wheel axle of the rear wheel assembly 22 is relatively long, as shown in fig. 1 to 5.

When the stroller is folded, the backrest 52 is first rotated forward to close the seat 51, as shown in fig. 6; sliding the upper push rod 132 downwards relative to the lower push rod 131 to retract into the lumen of the lower push rod 131, as shown in fig. 7; flipping the pusher bar assembly 13 forward as shown in fig. 8; the push rod assembly 13 is continuously turned forwards and downwards to drive the seat assembly to turn downwards to be close to the front support 11, meanwhile, the front support 11 turns backwards and downwards to be close to the bottom rod assembly 14 around the rotary joint with the bottom rod 141, the rear support 12 turns backwards and downwards to be close to the bottom rod assembly 14 around the rotary joint with the bottom rod 141, when the rear support 12 rotates, the fixing seat 123 moves forwards, the rear wheel assembly 22 is pulled by the connecting rod 4 to rotate forwards around the third shaft 33 relative to the connecting shaft 23 and gradually close to the front wheel assembly 21, meanwhile, as the front end part of the connecting rod 4 is in universal rotary connection with the rear support 12 through the spherical joint 41, the second shaft 32 of which the rear end part is in rotary connection with the rear wheel assembly 22 extends backwards and forwards from the outer side to the inner side of the stroller wheel assembly frame along the left-right direction, the front wheel assembly 21 and the rear wheel assembly 22 on the left side and the right side both turn around the first shaft 31 towards the inner side of the stroller to be close to the stroller frame, as shown in fig. 9 to 11.

When the stroller is in a folded state, the rod members forming the frame of the stroller are closely closed together, the push rod assembly 13, the front support 11, the rear support 12 and the bottom rod 141 are sequentially arranged from top to bottom, the front wheel assembly 21 and the rear wheel assembly 22 on the left and right sides are accommodated between the bottom rods 141 on the left and right sides, the wheel axle of the front wheel assembly 21 and the wheel axle of the rear wheel assembly 22 extend in the up-down direction, and the distance between the wheel axle of the front wheel assembly 21 and the wheel axle of the rear wheel assembly 22 is relatively short, as shown in fig. 12.

Example 2

In this embodiment, the movable lever is the front bracket 11 and the first wheel assembly is located forward of the second wheel assembly, i.e., the first wheel assembly is the front wheel assembly 21 and the second wheel assembly is the rear wheel assembly 22. The link 4 is disposed between the front bracket 11 and the front wheel assembly 21.

When the stroller is unfolded, the connecting rods 4 are located in front of the front support 11, the front wheel assemblies 21 are respectively arranged on the left side and the right side of the stroller, the number of the connecting rods 4 is two, each connecting rod 4 extends from the rear direction to the outer side of the stroller in an inclined mode, the rear end portion of each connecting rod 4 is rotatably connected with the lower end portion of the front support 11 through a spherical joint, the front end portion of each connecting rod 4 is rotatably connected with the front wheel assembly 21 through a second shaft 32, and the second shaft 32 extends from the outer side of the stroller frame to the inner side in a forward inclined mode along the left-right direction. The front wheel assembly 21 is rotatably connected with the connecting shaft 23 through a third shaft 33, and the rear wheel assembly 22 is fixedly connected with the connecting shaft 23. The rest is the same as in example 1.

In this embodiment, when the stroller frame is folded, when the push rod assembly 13 is turned over, the front bracket 11 is driven to turn forward and downward around the rotational connection with the bottom rod 141 to close to the bottom rod assembly 14, the rear bracket 12 turns forward and downward around the rotational connection with the bottom rod 141 to close to the bottom rod assembly 14, when the front bracket 11 is rotated, the universal rotational connection between the connecting rod 4 and the front bracket 11 moves backward, the front wheel assembly 21 is pulled by the connecting rod 4 to rotate backward around the third shaft 33 relative to the connecting shaft 23 to gradually close to the rear wheel assembly 22, and simultaneously, the front wheel assembly 21 and the rear wheel assembly 22 on the left side and the right side are both turned over around the first shaft 31 to the inside of the stroller.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A children's stroller, comprising a stroller frame having an unfolded and folded state, a first wheel assembly disposed at the bottom of the stroller frame, the stroller frame being included in the stroller frame A movable rod that can move when folded, characterized in that the stroller further comprises a connecting rod arranged between the movable rod and the first wheel assembly, and one end of the connecting rod is connected to the movable rod Universal rotation connection, the other end of the connecting rod is connected in rotation with the first wheel assembly, when the cart frame is folded, the movable rod moves, and the first wheel is driven by the connecting rod The assembly is flipped inside the cart frame about a first axis extending in the front-to-rear direction.

2 . The stroller according to claim 1 , wherein one end of the connecting rod is rotatably connected to the movable rod through a ball joint, and the other end of the connecting rod is connected to the first wheel assembly. 3 . The second shaft is rotationally connected, and the second shaft extends obliquely in the left-right direction.

3 . The stroller according to claim 2 , wherein the movable rod is a rear bracket of the stroller frame, the first wheel assembly is a rear wheel assembly, and the connecting rod is located in the Behind the rear bracket, the front end of the connecting rod and the lower end of the rear bracket are rotatably connected through the ball joint, and the rear end of the connecting rod and the rear wheel assembly are rotatably connected through the second shaft , the second shaft extends from the outer side to the inner side of the cart frame along the left-right direction and extends backward obliquely.

4 . The stroller according to claim 3 , wherein the rear wheel assemblies are respectively arranged on the left and right sides of the stroller, and there are two connecting rods, and each connecting rod is provided with two connecting rods. 5 . They are all connected between the rear bracket and the rear wheel assembly on the corresponding side, and each of the connecting rods extends obliquely from front to rear to the outside of the stroller.

5 . The stroller according to claim 2 , wherein the movable rod is a front bracket of the stroller frame, the first wheel assembly is a front wheel assembly, and the connecting rod is located in the In front of the front bracket, the rear end of the connecting rod and the lower end of the front bracket are rotatably connected through the ball joint, and the front end of the connecting rod and the front wheel assembly are rotatably connected through the second shaft , the second shaft is inclined forwardly extending from the outer side to the inner side of the cart frame along the left-right direction.

6 . The stroller according to claim 5 , wherein the front wheel assemblies are respectively disposed on the left and right sides of the stroller, and two connecting rods are provided, and each connecting rod is provided with two connecting rods. 7 . Each of the connecting rods is connected to the front bracket and the front wheel assembly on the corresponding side, and each of the connecting rods extends obliquely from the rear to the front toward the outer side of the stroller.

7. The stroller of claim 1, wherein the stroller further comprises a second wheel assembly located in front of or behind the first wheel assembly and a connecting shaft extending in the front-rear direction, so that The two ends of the connecting shaft are respectively connected with the first wheel assembly and the second wheel assembly, and when the cart frame is folded, the first wheel assembly is driven to rotate the cart around the first axis. When the inner side of the frame is turned over, the second wheel assembly is driven to turn over the inner side of the cart frame synchronously around the first axis.

8 . The stroller according to claim 7 , wherein the first wheel assembly is rotatably connected to the connecting shaft through a third shaft, the third shaft extends in the left-right direction, and the second wheel The assembly is fixedly connected with the connecting shaft.

9 . The stroller of claim 7 , wherein when the stroller is in a deployed state, both the axle of the first wheel assembly and the axle of the second wheel assembly extend in a horizontal direction. 10 . , when the stroller is in the folded state, the axle of the first wheel assembly and the axle of the second wheel assembly both extend in the up-down direction.

10 . The stroller according to claim 1 , wherein the stroller frame comprises a front bracket, a rear bracket, a push rod assembly and a bottom rod assembly, and the upper part of the front bracket is connected to the push rod assembly. 11 . The lower part of the front bracket is rotatably connected with the bottom rod assembly, the upper part of the rear bracket is rotatably connected with the lower part of the push rod assembly, and the lower part of the rear bracket is rotated with the bottom rod assembly connected, the stroller further includes a second wheel assembly disposed at the bottom of the stroller frame and a connecting shaft connected between the first wheel assembly and the second wheel assembly, the bottom rod The assembly includes a bottom rod extending in the front-rear direction, the bottom rod is sleeved on the outside of the connecting shaft and matched with the connecting shaft, and the connecting shaft is rotatably arranged on the bottom of the first shaft. In the rod, the movable rod is the front bracket or the rear bracket.