WO2024087310A1

WO2024087310A1 - Stroller

Info

Publication number: WO2024087310A1
Application number: PCT/CN2022/135041
Authority: WO
Inventors: 刘伟; 闫德锋; 张孟
Original assignee: 好孩子儿童用品有限公司
Priority date: 2022-10-28
Filing date: 2022-11-29
Publication date: 2024-05-02
Also published as: CN115716497A

Abstract

A stroller, comprising: an underframe (1), an upper enclosure frame (2), and a folding mechanism arranged between the underframe (1) and the upper enclosure frame (2) and used for driving the upper enclosure frame (2) to move closer to or away from the underframe (1). The folding mechanism comprises a first linkage assembly and a second linkage assembly. The first linkage assembly comprises a first upper link rod (61) and a first lower link rod (62), wherein the upper end of the first upper link rod (61) is rotatably connected to the upper enclosure frame (2), the lower end of the first lower link rod (62) is rotatably connected to the underframe (1), and the lower end of the first upper link rod (61) is rotatably connected to the upper end of the first lower link rod (62). The second linkage assembly comprises a second upper link rod (63) and a second lower link rod (64), wherein the upper end of the second upper link rod (63) is rotatably connected to the upper enclosure frame (2), the lower end of the second lower link rod (64) is rotatably connected to the underframe (1), and the lower end of the second upper link rod (63) is rotatably connected to the upper end of the second lower link rod (64). The first linkage assembly cooperates with the second linkage assembly, and when one of the first linkage assembly and the second linkage assembly moves, the other one is driven to move synchronously, such that the upper enclosure frame (2) performs a translational motion up and down relative to the underframe (1).

Description

A children's car

Technical Field

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

Background technique

A child trailer can not only be used to carry children for use outside, but can also be used as a tool for transporting items, which makes the use of child trailers more and more widespread. In order to facilitate the carrying and storage of child trailers, child trailers can generally be folded. The child trailer includes a base frame and an upper frame arranged above the base frame. When the child trailer is unfolded for use, the upper frame is away from the base frame. When the child trailer is folded, the upper frame is close to the base frame. In the prior art, when the upper frame is folded or unfolded, the upper frame cannot always maintain translational motion, so that the cloth cover between the upper frame and the base frame is pulled, making the folding and unfolding of the upper frame not smooth, and also affecting the service life of the cloth cover.

Summary of the invention

The object of the present invention is to provide a baby carriage in view of the deficiencies in the prior art, wherein when the baby carriage is folded or unfolded, the upper surrounding frame always performs an upward or downward translation movement.

To achieve the above object, the technical solution adopted by the present invention is:

A children's stroller, comprising a base frame and an upper frame located above the base frame, the children's stroller also comprising a folding mechanism arranged between the base frame and the upper frame for driving the upper frame to move closer to or away from the base frame, the folding mechanism comprising a first link assembly and a second link assembly, the first link assembly comprising a first upper link and a first lower link, the upper end of the first upper link is rotatably connected to the upper frame, the lower end of the first lower link is rotatably connected to the base frame, the lower end of the first upper link is rotatably connected to the upper end of the first lower link, the second link assembly comprises a second upper link and a second lower link, the upper end of the second upper link is rotatably connected to the upper frame, the lower end of the second lower link is rotatably connected to the base frame, the lower end of the second upper link is rotatably connected to the upper end of the second lower link, the first link assembly cooperates with the second link assembly, and when one of the first link assembly and the second link assembly moves, the other is driven to move synchronously so that the upper frame performs an up and down translational movement relative to the base frame.

Preferably, the first upper connecting rod cooperates with the second upper connecting rod.

Further, the first upper connecting rod includes a first upper rod body and a first gear fixedly arranged at the upper end portion of the first upper rod body, the first gear is rotatably connected to the upper frame, the lower end portion of the first upper rod body is rotatably connected to the upper end portion of the first lower connecting rod, the second upper connecting rod includes a second upper rod body and a second gear fixedly arranged at the upper end portion of the second upper rod body, the second gear is rotatably connected to the upper frame, the lower end portion of the second upper rod body is rotatably connected to the upper end portion of the second lower connecting rod, and the first gear is meshed with the second gear.

Preferably, the first lower connecting rod cooperates with the second lower connecting rod.

Further, the first lower connecting rod includes a first lower rod body and a third gear fixedly arranged at the lower end of the first lower rod body, the third gear is rotatably connected to the base frame, the upper end of the first lower rod body is rotatably connected to the lower end of the first upper connecting rod, the second lower connecting rod includes a second lower rod body and a fourth gear fixedly arranged at the lower end of the second lower rod body, the fourth gear is rotatably connected to the base frame, the upper end of the second lower rod body is rotatably connected to the lower end of the second upper connecting rod, and the third gear is meshed with the fourth gear.

Preferably, the first upper connecting rod cooperates with the second upper connecting rod, and the first lower connecting rod cooperates with the second lower connecting rod.

Further, the first upper connecting rod includes a first upper rod body and a first gear fixedly arranged at the upper end portion of the first upper rod body, the second upper connecting rod includes a second upper rod body and a second gear fixedly arranged at the upper end portion of the second upper rod body, the first lower connecting rod includes a first lower rod body and a third gear fixedly arranged at the lower end portion of the first lower rod body, the second lower connecting rod includes a second lower rod body and a fourth gear fixedly arranged at the lower end portion of the second lower rod body, the first gear and the second gear are both rotatably connected to the upper frame, the third gear and the fourth gear are both rotatably connected to the base frame, the lower end portion of the first upper rod body is rotatably connected to the upper end portion of the first lower rod body, the lower end portion of the second upper rod body is rotatably connected to the upper end portion of the second lower rod body, the first gear is meshed with the second gear, and the third gear is meshed with the fourth gear.

Preferably, a rotational connection between an upper end portion of the first upper connecting rod and the upper surrounding frame, and a rotational connection between an upper end portion of the second upper connecting rod and the upper surrounding frame are located at different positions of the upper surrounding frame.

Furthermore, the rotational connection between the upper end of the first upper connecting rod and the upper surrounding frame and the rotational connection between the upper end of the second upper connecting rod and the upper surrounding frame are at the same height position on the upper surrounding frame.

Preferably, a rotational connection between the lower end of the first lower link and the base frame and a rotational connection between the lower end of the second lower link and the base frame are located at different positions of the base frame.

Further, the rotation connection between the lower end of the first lower connecting rod and the base frame and the rotation connection between the lower end of the second lower connecting rod and the base frame are at the same height position on the base frame.

Preferably, the first connecting rod assembly and the second connecting rod assembly are symmetrically arranged between the base frame and the upper surrounding frame.

Preferably, the baby carriage also includes a first limiting structure for limiting the movement of the folding mechanism when the upper frame is unfolded from the folded position so that the upper frame is in the unfolded position, the first limiting structure includes a first limiting portion respectively arranged on both sides of the base frame and a second limiting portion respectively arranged on both sides of the upper frame, when the upper frame is in the unfolded position, the first lower connecting rod and the second lower connecting rod are respectively abutted against and matched with the first limiting portion at the corresponding position, and the first upper connecting rod and the second upper connecting rod are respectively abutted against and matched with the second limiting portion at the corresponding position.

Preferably, the baby carriage also includes a second limiting structure for limiting the movement of the folding mechanism when the upper frame is folded from the unfolded position so that the upper frame is in the folded position, the second limiting structure includes a third limiting portion respectively arranged on both sides of the base frame and a fourth limiting portion respectively arranged on both sides of the upper frame, when the upper frame is in the folded position, the first lower connecting rod and the second lower connecting rod are respectively abutted against and matched with the third limiting portion at the corresponding position, and the first upper connecting rod and the second upper connecting rod are respectively abutted against and matched with the fourth limiting portion at the corresponding position.

Preferably, the baby carriage has a first folding mechanism arranged between the front end of the base frame and the front end of the upper frame, and a second folding mechanism arranged between the rear end of the base frame and the rear end of the upper frame, and the first folding mechanism and the second folding mechanism are the same as the folding mechanism.

Preferably, the upper frame does not deform when performing an upward and downward translation movement relative to the base frame.

Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: when the baby stroller of the present invention is folded or unfolded, as long as the first link assembly and the second link assembly are actuated, the upper frame can be moved downward to approach the bottom frame or moved upward away from the bottom frame, thereby realizing the folding and unfolding operation of the upper frame. Moreover, when the upper frame is folded or unfolded, the first link assembly and the second link assembly can be actuated synchronously, so that the upper frame can always maintain the upward or downward translation movement without twisting, so that the folding and unfolding action of the upper frame is smooth.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a perspective view of the baby stroller of this embodiment when the upper frame is in the unfolded position;

FIG2 is a rear view schematic diagram of the baby stroller of this embodiment when the upper frame is in the unfolded position;

FIG3 is a cross-sectional view of the baby stroller of this embodiment when the upper frame is in the unfolded position;

Figure 4 is a partial enlarged schematic diagram of point A in Figure 3;

Figure 5 is a partial enlarged schematic diagram of point B in Figure 3;

FIG6 is a three-dimensional schematic diagram of the baby stroller of this embodiment when the upper frame is in a folded position;

FIG7 is a rear view schematic diagram of the baby stroller of this embodiment when the upper frame is in a folded position;

FIG8 is a cross-sectional view of the baby stroller of this embodiment when the upper frame is in a folded position;

FIG9 is a partial enlarged schematic diagram of point A in FIG8.

Wherein: 1, chassis; 11, first limiting part; 12, third limiting part; 2, upper frame; 21, second limiting part; 22, fourth limiting part; 3, push rod; 4, front wheel assembly; 5, rear wheel assembly; 61, first upper connecting rod; 611, first upper rod body; 612, first gear; 62, first lower connecting rod; 621, first lower rod body; 622, third gear; 63, second upper connecting rod; 631, second upper rod body; 632, second gear; 64, second lower connecting rod; 641, second lower rod body; 642, fourth gear; 71, first shaft; 72, second shaft; 73, third shaft; 74, fourth shaft; 75, fifth shaft; 76, sixth shaft.

Detailed ways

The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Fig. 1 to Fig. 9, the baby stroller of the present invention comprises a bottom frame 1, an upper frame 2 and a push rod 3, wherein the upper frame 2 is located above the bottom frame 1, and the push rod 3 is arranged on the bottom frame 1 and is used to push or pull the baby stroller. The baby stroller also comprises a front wheel assembly 4 arranged at the bottom front part of the bottom frame 1 and a rear wheel assembly 5 arranged at the bottom rear part of the bottom frame 1.

The baby stroller has an unfolded state and a folded state. When the baby stroller is in the unfolded state, the upper frame 2 is in the unfolded position, which is away from the bottom frame 1, and a containing space is formed between the bottom frame 1 and the upper frame 2, and the containing space is used for children to sit, lie down, or for placing items, as shown in Figures 1 to 3. When the baby stroller is in the folded state, the upper frame 2 is in the folded position, which is close to the bottom frame 1, as shown in Figures 6 to 8. Preferably, the upper frame 2 is parallel to the bottom frame 1 in both the unfolded position and the folded position. The upper frame 2 and the bottom frame 1 are both made of hard materials and will not deform during the unfolding and folding process of the baby stroller.

The baby stroller further comprises a folding mechanism, which is connected between the bottom frame 1 and the upper frame 2. The folding mechanism can be unfolded and folded, and the upper frame 2 can be driven to the unfolded position by the unfolding action of the folding mechanism, and the upper frame 2 can be driven to the folded position by the folding action of the folding mechanism.

Specifically, the folding mechanism includes a first connecting rod assembly and a second connecting rod assembly.

As shown in Figures 1 to 3 and Figures 6 to 8, the first connecting rod assembly includes a first upper connecting rod 61 and a first lower connecting rod 62. The upper end of the first upper connecting rod 61 is rotatably connected to the upper frame 2 via a first shaft 71, the lower end of the first lower connecting rod 62 is rotatably connected to the base frame 1 via a second shaft 72, and the lower end of the first upper connecting rod 61 is rotatably connected to the upper end of the first lower connecting rod 62 via a third shaft 73.

As shown in Figures 1 to 3 and Figures 6 to 8, the second connecting rod assembly includes a second upper connecting rod 63 and a second lower connecting rod 64. The upper end of the second upper connecting rod 63 is rotationally connected to the upper frame 2 via a fourth shaft 74, the lower end of the second lower connecting rod 64 is rotationally connected to the base frame 1 via a fifth shaft 75, and the lower end of the second upper connecting rod 63 is rotationally connected to the upper end of the second lower connecting rod 64 via a sixth shaft 76.

The first shaft 71 and the fourth shaft 74 are located at different positions on the upper frame 2, and preferably the first shaft 71 and the fourth shaft 74 are located at the same height position on the upper frame 2. The second shaft 72 and the fifth shaft 75 are located at different positions on the bottom frame 1, and preferably the second shaft 72 and the fifth shaft 75 are located at the same height position on the bottom frame 1.

The first shaft 71 , the second shaft 72 , the third shaft 73 , the fourth shaft 74 , the fifth shaft 75 and the sixth shaft 76 are arranged in parallel.

When the folding mechanism is in the unfolded state, the upper frame 2 is in the unfolded position, at which time the first upper connecting rod 61 is away from the first lower connecting rod 62, and a relatively large angle is formed between the two; the second upper connecting rod 63 is away from the second lower connecting rod 64, and a relatively large angle is formed between the two. When the folding mechanism is in the folded state, the upper frame 2 is in the folded position, at which time the first upper connecting rod 61 is close to the first lower connecting rod 62, and a relatively small angle is formed between the two; the second upper connecting rod 63 is also close to the second lower connecting rod 64, and a relatively small angle is formed between the two.

Preferably, the first connecting rod assembly and the second connecting rod assembly are symmetrically arranged between the base frame 1 and the upper surrounding frame 2 .

The first connecting rod assembly cooperates with the second connecting rod assembly so that when one of the first connecting rod assembly and the second connecting rod assembly moves, the other can be driven to move synchronously, that is, when the first upper connecting rod 61 and the first lower connecting rod 62 rotate relatively close to each other, the second upper connecting rod 63 and the second lower connecting rod 64 rotate relatively close to each other synchronously; when the first upper connecting rod 61 and the first lower connecting rod 62 rotate relatively away from each other, the second upper connecting rod 63 and the second lower connecting rod 64 rotate relatively away from each other synchronously. This allows the upper frame 2 to always maintain a parallel state with the base frame 1 and make up and down translational movements when folded or unfolded without twisting.

In a specific implementation manner, the first upper connecting rod 61 and the second upper connecting rod 63 can be matched with each other, thereby achieving synchronous action of the first connecting rod assembly and the second connecting rod assembly.

Specifically, the first upper connecting rod 61 includes a first upper rod body 611 and a first gear 612 fixedly arranged at the upper end of the first upper rod body 611. The first gear 612 is rotatably connected to the upper frame 2 through the first shaft 71, and the lower end of the first upper rod body 611 is rotatably connected to the upper end of the first lower connecting rod 62 through the third shaft 73. The second upper connecting rod 63 includes a second upper rod body 631 and a second gear 632 fixedly arranged at the upper end of the second upper rod body 631. The second gear 632 is rotatably connected to the upper frame 2 through the fourth shaft 74, and the lower end of the second upper rod body 631 is rotatably connected to the upper end of the second lower connecting rod 64 through the sixth shaft 76, and the first gear 612 is meshed with the second gear 632, as shown in Figures 3 and 4.

When the first upper connecting rod 61 rotates relative to the first lower connecting rod 62, the first gear 612 rotates relative to the upper frame 2, and the second gear 632 is meshed with the first gear 612, so that the second gear 632 is also rotated relative to the upper frame 2, so that the second upper connecting rod 63 and the second lower connecting rod 64 rotate relative to each other. Conversely, when the second upper connecting rod 63 rotates relative to the second lower connecting rod 64, the first gear 612 is meshed with the second gear 632, so that the first upper connecting rod 61 is synchronously rotated relative to the first lower connecting rod 62, thereby realizing the synchronous action of the first connecting rod assembly and the second connecting rod assembly.

In another specific implementation manner, the first lower connecting rod 62 and the second lower connecting rod 64 may also be matched with each other, so as to achieve synchronous action of the first connecting rod assembly and the second connecting rod assembly.

Specifically, the first lower connecting rod 62 includes a first lower rod body 621 and a third gear 622 fixedly arranged at the lower end of the first lower rod body 621. The third gear 622 is rotatably connected to the bottom frame 1 through the second shaft 72, and the upper end of the first lower rod body 621 is rotatably connected to the lower end of the first upper connecting rod 61 through the third shaft 73. The second lower connecting rod 64 includes a second lower rod body 641 and a fourth gear 642 fixedly arranged at the lower end of the second lower rod body 641, the fourth gear 642 is rotatably connected to the bottom frame 1 through the fifth shaft 75, the upper end of the second lower rod body 641 is rotatably connected to the lower end of the second upper connecting rod 63 through the sixth shaft 76, and the third gear 622 is meshed with the fourth gear 642, as shown in Figures 3 and 5.

When the first upper link 61 and the first lower link 62 rotate relative to each other, the third gear 622 rotates relative to the bottom frame 1, and the third gear 622 is meshed with the fourth gear 642, so that the fourth gear 642 can also rotate relative to the bottom frame 1, so that the second upper link 63 and the second lower link 64 rotate relative to each other. Conversely, when the second upper link 63 and the second lower link 64 rotate relative to each other, the third gear 622 is meshed with the fourth gear 642, so that the first upper link 61 can rotate synchronously relative to the first lower link 62, thereby realizing the synchronous action of the first link assembly and the second link assembly.

Of course, the above two embodiments can also be adopted at the same time, that is, the upper ends of the first upper connecting rod 61 and the second upper connecting rod 63 are meshed with the second gear 632 through the first gear 612, and the lower ends of the first lower connecting rod 62 and the second lower connecting rod 64 are meshed with the fourth gear 642 through the third gear 622. In this way, while realizing the synchronous action of the first connecting rod assembly and the second connecting rod assembly so that the upper surrounding frame 2 always maintains the upward or downward translation movement, the structure of the locking mechanism of the child stroller for locking the upper surrounding frame 2 in the unfolded position is also made simple, and only the positions of two mutually connected components among the upper surrounding frame 2, the first upper connecting rod 61, the first lower connecting rod 62, the bottom frame 1, the second lower connecting rod 64 and the second upper connecting rod 63 need to be locked.

The baby stroller further comprises a first limiting structure. When the upper frame 2 is unfolded from the folded position, the first limiting structure can limit the action of the folding mechanism so that the upper frame 2 is in the unfolded position.

Specifically, as shown in Fig. 3 to Fig. 5, the first limiting structure includes a first limiting portion 11 provided on the bottom frame 1 and a second limiting portion 21 provided on the upper frame 2, wherein the first limiting portion 11 is provided on both sides of the bottom frame 1, and the second limiting portion 21 is provided on both sides of the upper frame 2. When the upper frame 2 is in the unfolded position, the first lower connecting rod 62 and the second lower connecting rod 64 are respectively abutted against and matched with the first limiting portion 11 at the corresponding position, and the first upper connecting rod 61 and the second upper connecting rod 63 are respectively abutted against and matched with the second limiting portion 21 at the corresponding position.

The baby stroller further comprises a second limiting structure. When the upper frame 2 is folded from the unfolded position, the second limiting structure can limit the action of the folding mechanism so that the upper frame 2 is in the folded position.

Specifically, as shown in Figures 8 and 9, the second limiting structure includes a third limiting portion 12 provided on the bottom frame 1 and a fourth limiting portion 22 provided on the upper frame 2, wherein the third limiting portion 12 is provided on both sides of the bottom frame 1, and the fourth limiting portion 22 is provided on both sides of the upper frame 2. When the upper frame 2 is in the folded position, the first lower connecting rod 62 and the second lower connecting rod 64 are respectively abutted against and matched with the third limiting portion 12 at the corresponding position, and the first upper connecting rod 61 and the second upper connecting rod 63 are respectively abutted against and matched with the fourth limiting portion 22 at the corresponding position.

In this embodiment, the folding mechanism is disposed between the front end of the bottom frame 1 and the front end of the upper frame 2, and the folding mechanism is defined as the first folding mechanism. The folding mechanism is also disposed between the rear end of the bottom frame 1 and the rear end of the upper frame 2, and the folding mechanism is defined as the second folding mechanism.

When the upper frame 2 is converted from the unfolded position to the folded position, the locking mechanism is unlocked and the upper frame 2 is pressed downward. In the first folding mechanism and the second folding mechanism, the first gear 612 is meshed with the second gear 632 and the third gear 622 is meshed with the fourth gear 642, so that the first upper connecting rod 61 and the first lower connecting rod 62 are relatively rotated and brought together, and the second upper connecting rod 63 and the second lower connecting rod 64 are also synchronously rotated and brought together, so that the upper frame 2 remains parallel to the bottom frame 1 and moves downward in translation with the bottom frame 1. The upper frame 2 is in a folded position as shown in FIGS. 6 to 8 .

When the upper frame 2 is in the folded position, the push rod 3 is brought close to the base frame 1, and the baby carriage is in the folded state.

When the baby stroller is unfolded from the folded state, the push rod 3 moves in the opposite direction to the unfolded position, and the upper frame 2 is lifted upward. In the first folding mechanism and the second folding mechanism, the first gear 612 is engaged with the second gear 632, and the third gear 622 is engaged with the fourth gear 642, so that the first upper connecting rod 61 and the first lower connecting rod 62 are relatively rotated away from each other, and the second upper connecting rod 63 and the second lower connecting rod 64 are also synchronously rotated away from each other, so that the upper frame 2 remains parallel to the bottom frame 1 and moves upward in translation away from the bottom frame. The upper frame 2 is in the expanded position, as shown in FIGS. 1 to 3 .

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 the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

A baby stroller, comprising a base frame and an upper frame located above the base frame, characterized in that the baby stroller also includes a folding mechanism arranged between the base frame and the upper frame for driving the upper frame to move closer to or away from the base frame, the folding mechanism includes a first link assembly and a second link assembly, the first link assembly includes a first upper link and a first lower link, the upper end of the first upper link is rotatably connected to the upper frame, the lower end of the first lower link is rotatably connected to the base frame, the lower end of the first upper link is rotatably connected to the upper end of the first lower link, the second link assembly includes a second upper link and a second lower link, the upper end of the second upper link is rotatably connected to the upper frame, the lower end of the second lower link is rotatably connected to the base frame, the lower end of the second upper link is rotatably connected to the upper end of the second lower link, the first link assembly cooperates with the second link assembly, and when one of the first link assembly and the second link assembly moves, the other is driven to move synchronously so that the upper frame moves up and down relative to the base frame.
The children's stroller according to claim 1, wherein the first upper connecting rod cooperates with the second upper connecting rod.
The children's stroller according to claim 2 is characterized in that: the first upper connecting rod includes a first upper rod body and a first gear fixedly arranged at the upper end of the first upper rod body, the first gear is rotatably connected to the upper frame, the lower end of the first upper rod body is rotatably connected to the upper end of the first lower connecting rod, the second upper connecting rod includes a second upper rod body and a second gear fixedly arranged at the upper end of the second upper rod body, the second gear is rotatably connected to the upper frame, the lower end of the second upper rod body is rotatably connected to the upper end of the second lower connecting rod, and the first gear is meshed with the second gear.
The baby stroller according to claim 1, wherein the first lower connecting rod cooperates with the second lower connecting rod.
The children's car according to claim 4 is characterized in that: the first lower connecting rod includes a first lower rod body and a third gear fixedly arranged at the lower end of the first lower rod body, the third gear is rotatably connected to the base frame, the upper end of the first lower rod body is rotatably connected to the lower end of the first upper connecting rod, the second lower connecting rod includes a second lower rod body and a fourth gear fixedly arranged at the lower end of the second lower rod body, the fourth gear is rotatably connected to the base frame, the upper end of the second lower rod body is rotatably connected to the lower end of the second upper connecting rod, and the third gear is meshed with the fourth gear.
The baby stroller according to claim 1, wherein the first upper connecting rod cooperates with the second upper connecting rod, and the first lower connecting rod cooperates with the second lower connecting rod.
The child stroller according to claim 6 is characterized in that: the first upper connecting rod includes a first upper rod body and a first gear fixedly arranged at the upper end portion of the first upper rod body, the second upper connecting rod includes a second upper rod body and a second gear fixedly arranged at the upper end portion of the second upper rod body, the first lower connecting rod includes a first lower rod body and a third gear fixedly arranged at the lower end portion of the first lower rod body, the second lower connecting rod includes a second lower rod body and a fourth gear fixedly arranged at the lower end portion of the second lower rod body, the first gear and the second gear are both rotatably connected to the upper frame, the third gear and the fourth gear are both rotatably connected to the base frame, the lower end portion of the first upper rod body is rotatably connected to the upper end portion of the first lower rod body, the lower end portion of the second upper rod body is rotatably connected to the upper end portion of the second lower rod body, the first gear is meshed with the second gear, and the third gear is meshed with the fourth gear.
The baby stroller according to claim 1, characterized in that: the rotation connection between the upper end of the first upper connecting rod and the upper surrounding frame and the rotation connection between the upper end of the second upper connecting rod and the upper surrounding frame are located at different positions of the upper surrounding frame.
The baby stroller according to claim 8, characterized in that: the rotation connection between the upper end of the first upper connecting rod and the upper surrounding frame and the rotation connection between the upper end of the second upper connecting rod and the upper surrounding frame are at the same height position on the upper surrounding frame.
The baby stroller according to claim 1, characterized in that: the rotation connection between the lower end of the first lower connecting rod and the base frame and the rotation connection between the lower end of the second lower connecting rod and the base frame are located at different positions of the base frame.
The baby stroller according to claim 10 is characterized in that: the rotation connection between the lower end of the first lower connecting rod and the base frame and the rotation connection between the lower end of the second lower connecting rod and the base frame are at the same height position on the base frame.
The baby stroller according to claim 1, wherein the first connecting rod assembly and the second connecting rod assembly are symmetrically arranged between the base frame and the upper surrounding frame.
The children's stroller according to claim 1 is characterized in that: the children's stroller also includes a first limiting structure for limiting the action of the folding mechanism when the upper frame is unfolded from the folded position so that the upper frame is in the unfolded position, the first limiting structure includes a first limiting portion respectively arranged on both sides of the base frame and a second limiting portion respectively arranged on both sides of the upper frame, when the upper frame is in the unfolded position, the first lower connecting rod and the second lower connecting rod are respectively abutted against and matched with the first limiting portion at the corresponding position, and the first upper connecting rod and the second upper connecting rod are respectively abutted against and matched with the second limiting portion at the corresponding position.
The children's stroller according to claim 1 is characterized in that: the children's stroller also includes a second limiting structure for limiting the action of the folding mechanism when the upper frame is folded from the unfolded position so that the upper frame is in the folded position, the second limiting structure includes a third limiting portion respectively arranged on both sides of the base frame and a fourth limiting portion respectively arranged on both sides of the upper frame, when the upper frame is in the folded position, the first lower connecting rod and the second lower connecting rod are respectively abutted against and matched with the third limiting portion at the corresponding position, and the first upper connecting rod and the second upper connecting rod are respectively abutted against and matched with the fourth limiting portion at the corresponding position.
The baby stroller according to claim 1 is characterized in that: the baby stroller has a first folding mechanism arranged between the front end of the base frame and the front end of the upper frame, and a second folding mechanism arranged between the rear end of the base frame and the rear end of the upper frame, and the first folding mechanism and the second folding mechanism are the same as the folding mechanism.
The children's stroller according to claim 1 is characterized in that the upper frame does not deform when it moves up and down relative to the bottom frame.