CN110979438A - Folding child's bike - Google Patents

Abstract

The invention discloses a folding buggy, wherein a chassis comprises a first chassis and a second chassis which are rotationally connected at the inner sides, wheel assemblies comprise a first wheel assembly rotationally connected with the first chassis and a second wheel assembly rotationally connected with the second chassis, the first wheel assembly and the second wheel assembly respectively have a first position and a second position through self rotation, the first position is below the chassis, the second position is in the inner side of the chassis, a connecting assembly comprises a first driving piece and a second driving piece, when the folding buggy is in an opening state, the first wheel assembly and the second wheel assembly are both located at the first position, and when the folding buggy is in a folding state, the first wheel assembly and the second wheel assembly respectively rotate to the second position through the sliding of the first driving piece and the second driving piece. This folding child's bike is folding, and the wheel upset is to the inboard on chassis to make whole car flat, greatly reduced occupation space, it is very convenient to deposit and carry.

Description

Folding child's bike

Technical Field

The invention relates to a folding child car.

Background

The child's carriage is a common child's walking tool, and the structure of a child's carriage includes a chassis, wheels connected below the chassis, and side frames connected with the chassis, and the side frames and the chassis form a containing space together, and the child can sit or lie on the chassis. The child cart with the structure can be dragged and pushed. The handle can be independently arranged, and the side frame can also be used as the handle when in dragging or pushing. The baby carriage of the type on the market at present has the problem of large volume after being folded, and particularly, the wheels cannot be folded relative to the chassis, so that the carriage occupies space and is inconvenient to carry.

Disclosure of Invention

In order to solve the above problems, it is an object of the present invention to provide a folding child's vehicle.

In order to achieve the above purposes, the invention adopts the technical scheme that: a folding buggy, which has an opening state and a folding state, the folding buggy comprises a chassis and wheel components connected with the chassis, the chassis comprises a first chassis and a second chassis which are rotationally connected at the inner sides, when the folding buggy is in the folding state, the first chassis and the second chassis are mutually rotated and closed, the wheel components comprise a first wheel component rotationally connected with the first chassis and a second wheel component rotationally connected with the second chassis, the first wheel component and the second wheel component are both provided with a first position and a second position through self rotation, the first position is arranged below the chassis, the second position is arranged at the inner side of the chassis,

the folding child car further comprises a connecting assembly connected with the wheel assemblies and the chassis, the connecting assembly comprises a first driving piece connected with the first bottom frame and the first wheel assembly in a relatively sliding mode, and a second driving piece connected with the second bottom frame and the second wheel assembly in a relatively sliding mode, when the folding child car is in an opening state, the first wheel assembly and the second wheel assembly are located at a first position, and when the folding child car is in a folding state, the first wheel assembly and the second wheel assembly drive the child car to rotate to a second position through the sliding of the first driving piece and the second driving piece respectively while the connecting assembly, the first bottom frame and the second bottom frame are mutually folded.

Further, the connecting assembly comprises a first driving piece and a second driving piece, wherein the first driving piece is connected with the first chassis and the first wheel assembly in a relatively sliding mode, the second driving piece is connected with the second chassis and the second wheel assembly in a relatively sliding mode, and when the folding child bicycle is in the folding state, the first wheel assembly and the second wheel assembly are driven to rotate to the second position through sliding of the first driving piece and the second driving piece respectively.

Furthermore, a first spiral groove is formed in the first wheel assembly, and the first driving piece is connected with the first spiral groove in a sliding mode; the second wheel component is provided with a second spiral groove, and the second driving piece is in sliding connection with the second spiral groove.

Furthermore, the first wheel assembly comprises a first sleeve which is pivotally connected to the first chassis, a first joint which is connected with the first sleeve and a first wheel which is rotatably connected to the first joint, and a first spiral groove is formed in the first sleeve; the second wheel assembly comprises a second sleeve which is pivotally connected to the second chassis, a second joint which is connected with the second sleeve, and a second wheel which is rotatably connected to the second joint, and the second spiral groove is formed in the second sleeve.

Optionally, the connecting assembly further includes a first side bar with a lower portion rotatably connected to the first chassis, and a second side bar with a lower portion rotatably connected to the second chassis, an upper portion of the first side bar and an upper portion of the second side bar are rotatably connected, one end of the first driving member is rotatably connected to the first side bar and the other end is slidably connected to the first chassis, and one end of the second driving member is rotatably connected to the second side bar and the other end is slidably connected to the second chassis.

Furthermore, the folding child car also comprises an upper joint which is rotatably connected with the upper part of the first side bar and the upper part of the second side bar in the same shaft, a first upper frame and a second upper frame, the inner sides of which are rotatably connected with the upper joint, a first upper connecting rod, the upper end of which is rotatably connected with the first upper frame and the lower end of which is rotatably connected with the first side bar, and a second upper connecting rod, the upper end of which is rotatably connected with the second upper frame and the lower end of which is rotatably connected with the second side bar.

Furthermore, the first side bar, the second side bar, the first upper connecting rod, the second upper connecting rod and the first upper joint are respectively provided with two parts and are symmetrically arranged on the left side and the right side of the folding baby carriage, when the folding baby carriage is in an opening state, the first upper frame and the second upper frame are respectively positioned right above the first underframe and the second underframe, and when the folding baby carriage is in a folding state, the first upper frame and the second upper frame are respectively close to the first underframe and the second underframe.

Optionally, the connecting assembly further includes a first sliding frame slidably connected to the first chassis, a first connecting rod having one end rotatably connected to the second chassis and the other end rotatably connected to the first sliding frame, a second sliding frame slidably connected to the second chassis, and a second connecting rod having one end rotatably connected to the first chassis and the other end rotatably connected to the second sliding frame, and the first driving member and the second driving member are respectively and fixedly connected to the first sliding frame and the second sliding frame.

Furthermore, the folding child car further comprises a first side frame rotationally connected with the outer side of the first underframe, a second side frame rotationally connected with the outer side of the second underframe, a first side connecting rod with one end rotationally connected with the first sliding frame and the other end rotationally connected with the first side frame, and a second side connecting rod with one end rotationally connected with the second sliding frame and the other end rotationally connected with the second side frame.

Furthermore, the first connecting rod, the second connecting rod, the first side connecting rod and the second side connecting rod are respectively provided with two connecting rods and are respectively arranged on the left side and the right side of the folding baby carriage, when the folding baby carriage is in an opening state, the first side frame and the second side frame are respectively perpendicular to the first underframe and the second underframe, and when the folding baby carriage is in a folding state, the first side frame and the second side frame are respectively close to the first underframe and the second underframe.

Due to the adoption of the technical scheme, the folding child bicycle has the advantages that through the structural design, the wheels are turned to the inner side of the chassis after being folded, so that the whole bicycle is flat, the occupied space is greatly reduced, and the folding child bicycle is very convenient to store and carry.

Drawings

FIG. 1 is a schematic structural view of a folding child's vehicle in an embodiment of the present invention, wherein the folding child's vehicle is in an open position;

FIG. 2 is a side view schematic of the structure of FIG. 1;

FIG. 3 is a schematic structural view of the folding child's vehicle when folded;

FIG. 4 is a side view schematic of the structure of FIG. 4;

FIG. 5 is a schematic structural view of the folding child's vehicle in a folded condition;

FIG. 6 is a side view schematic of the structure of FIG. 5;

FIG. 7 is a schematic structural view of a folding child's vehicle in another embodiment of the present invention, wherein the folding child's vehicle is in an open position;

FIG. 8 is a side view schematic of the structure of FIG. 7;

fig. 9 is a schematic top view of a portion a of fig. 8;

FIG. 10 is a schematic structural view of the folding child's vehicle shown in FIG. 7 when folded;

FIG. 11 is a side view schematic of the structure of FIG. 10;

FIG. 12 is a schematic structural view of the folding child's vehicle illustrated in FIG. 7 in a folded condition;

FIG. 13 is a side view schematic of the structure of FIG. 12;

fig. 14 is a schematic view of the folded buggy structure shown in fig. 7 when fitted with a cloth cover.

The reference numbers in the figures are:

110. a first chassis; 120. a second chassis; 121. a handle; 130. a first upper frame; 140. a second upper frame; 150. a first wheel assembly; 1511. a first helical groove; 151. a first sleeve; 152. a first joint; 153. a first wheel; 160. a second wheel assembly; 1611. a second helical groove; 161. a second sleeve; 162. a second joint; 163. a second wheel; 170. a first side bar; 171. a first upper link; 172. a first driving member; 173. an upper joint; 180. a second side bar; 181. a second upper link; 182. a second driving member; 190. a push handle;

210. a first chassis; 220. a second chassis; 230. a first side frame; 240. a second side frame;

250. a first wheel assembly; 2511. a first helical groove; 251. a first sleeve; 252. A first joint; 253. a first wheel; 260. a second wheel assembly; 2611. a second helical groove; 261. a second sleeve; 262. A second joint; 263. a second wheel; 270. a first carriage; 271. a first driving member; 280. a second carriage; 281. a second driving member; 291. a first link; 292. a second link; 293. a first side link; 294. a second side link;

300. and (4) covering with cloth.

Detailed Description

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the invention may be more readily understood by those skilled in the art.

The terms "inboard" and "outboard" in the following embodiments refer to opposite sides of a component, wherein the direction toward the center of the trailer is "inboard" and the direction away from the center of the trailer is "outboard", and the terms "left" and "right" refer to another pair of opposite sides of the component, with the "inboard" side of the component between the left and right sides and between the inner and outer sides.

Example one

Referring to fig. 1 to 6, which have an open state and a folded state, the folding buggy includes a frame and a wheel assembly, the frame includes a chassis, the wheel assembly is connected with the chassis, the chassis includes a first chassis 110 and a second chassis 120 which are rotatably connected at the inner side, when the folding buggy is in the open state, the first chassis 110 and the second chassis 120 are unfolded and substantially on the same plane to jointly form a supporting surface for children to sit, and when the folding buggy is in the folded state, the first chassis 110 and the second chassis 120 are rotated to each other to be close to each other.

The wheel assembly includes a first wheel assembly 150 rotatably coupled to the first chassis 110, and a second wheel assembly 160 rotatably coupled to the second chassis 120, and the first wheel assembly 150 and the second wheel assembly 160 each have a first position and a second position by rotating themselves, the first position being below the chassis, and the second position being inside the chassis. The folding buggy further comprises a coupling assembly comprising a first drive member 171 which is relatively slidably connected to each of the first chassis 110 and the first wheel assembly 150, a second drive member 181 which is relatively slidably connected to each of the second chassis 120 and the second wheel assembly 160, each of the first wheel assembly 150 and the second wheel assembly 160 being in a first position when the folding buggy is in the unfolded condition, and the first wheel assembly 150 and the second wheel assembly 160 being rotated to a second position by sliding of the first drive member 171 and the second drive member 181 respectively when the folding buggy is in the folded condition.

Specifically, the first chassis 110 and the second chassis 120 are provided with long straight grooves (not shown in the drawings) extending in the front-rear direction, the first wheel assembly 150 is provided with a first spiral groove 1511, and one end of the first driving member 171 slides in both the long straight grooves and the first spiral groove 1511. More specifically, the first wheel assembly 150 includes a first sleeve 151 pivotally connected to the first chassis 110, a first joint 152 rotatably connected to the first sleeve 151, and a first wheel 153 rotatably connected to the first joint 152, and the first spiral groove 1511 is formed on the first sleeve 151. Similarly, the second wheel assembly 160 is provided with a second spiral groove 1611, and one end of the second driving member 181 slides in the long straight groove and the second spiral groove 1611 at the same time. Also more specifically, the second wheel assembly 160 includes a second sleeve 161 pivotally connected to the second chassis 120, a second joint 162 rotatably connected to the second sleeve 161, and a second wheel 163 rotatably connected to the second joint 162, and the second spiral groove 1611 is opened on the second sleeve 161.

In a preferred embodiment, the connecting assembly is connected to the first chassis 110 and the second chassis 120, respectively, and is actuated by the mutual rotation of the first chassis 110 and the second chassis 120.

In this embodiment, the connecting assembly further includes a first side bar 170 having a lower portion rotatably coupled to the first chassis 110, a second side bar 180 having a lower portion rotatably coupled to the second chassis 120, and an upper portion of the first side bar 170 and an upper portion of the second side bar 180 are rotatably coupled. The first chassis 110, the second chassis 120, the first side bar 170, and the second side bar 180 constitute a four-bar linkage. One end of the first driving member 171 is rotatably connected to the first side bar 170 and the other end thereof is slidably connected to the first chassis 110, and one end of the second driving member 181 is rotatably connected to the second side bar 180 and the other end thereof is slidably connected to the second chassis 120.

In this embodiment, the folding child's vehicle further includes an upper joint 173 pivotally connected to the upper portion of the first side bar 170 and the upper portion of the second side bar 180 at the same axis, a first upper frame 130 and a second upper frame 140 pivotally connected to the upper joint 173 at the inner side, a first upper link 172 pivotally connected to the first upper frame 130 at the upper end and pivotally connected to the first side bar 170 at the lower end, and a second upper link 182 pivotally connected to the second upper frame 140 at the upper end and pivotally connected to the second side bar 180 at the lower end, wherein the first side bar 170, the first upper frame 130, the first upper link 172, and the upper joint 173 constitute a four-bar linkage mechanism, and correspondingly, the second side bar 180, the second upper frame 140, the second upper link 182, and the upper joint 173 constitute a four-bar linkage mechanism.

The first side bar 170, the second side bar 180, the first upper connecting rod 172, the second upper connecting rod 182 and the first upper joint 173 are respectively provided with two and symmetrically arranged at the left side and the right side of the folding buggy, when the folding buggy is in an opening state, the first side bar 170 and the second side bar 180 at the same side form a side frame of the folding buggy, the first upper frame 130 and the second upper frame 140 are respectively positioned right above the first underframe 110 and the second underframe 120, and when the folding buggy is in a folding state, the first upper frame 130 and the second upper frame 140 are respectively close to the first underframe 110 and the second underframe 120.

Preferably, a push handle 190 is pivotally connected to the second upper frame 140, the push handle 190 being openable relative to the second upper frame 140 when the foldable stroller is in the open position, and the push handle 190 being foldable relative to the second upper frame 140 when the foldable stroller is in the folded position.

Preferably, a handle 121 is provided at an inner side of the second chassis 120, and the handle 121 can be lifted when folded, thereby facilitating a user's folding operation.

The working principle is as follows:

when the handle 121 is pulled upward, the first chassis 110 and the second chassis 120 rotate toward each other under the action of gravity, the four-bar linkage mechanism consisting of the first chassis 110, the second chassis 120, the first side bar 170 and the second side bar 180 operates to rotate the first side bar 170 and the first chassis 110 toward each other, the second side bar 180 and the second chassis 120 toward each other to rotate the first driving member 171 and the second driving member 181, and the first driving member 171 and the second driving member 181 slide relative to the first chassis 110 and the second chassis 120, respectively, under the sliding fit action of the first driving member 171 and the first spiral groove 1511, the first wheel assembly 150 rotates relative to the first chassis 110, and similarly, under the sliding fit action of the second driving member 181 and the second spiral groove 1611, the second wheel assembly 160 rotates relative to the second chassis 120, thereby turning the first and second wheel assemblies 150 and 160 to the insides of the first and second bottom frames 110 and 120, respectively. Meanwhile, due to the relative rotation and folding of the first side bar 170 and the second side bar 180, the four-bar linkage consisting of the first side bar 170, the first upper frame 130, the first upper link 172 and the upper joint 173 and the four-bar linkage consisting of the second side bar 180, the second upper frame 140, the second upper link 182 and the upper joint 173 are driven to simultaneously act, and the first upper frame 130 and the second upper frame 140 respectively rotate downwards and are folded. And (4) folding the whole vehicle until all the parts are folded and close to each other to form a flat shape.

In this embodiment, the first upper frame and the second upper frame form an upper enclosure frame of the child car, and a cloth cover is arranged between the upper enclosure frame and the chassis, so that a hollow accommodating space is formed. When the folding child bicycle is in an opening state, the wheel assembly is in a first position, the wheel assembly is located below the chassis and outside a space where the bicycle frame is located, and rotating shafts of the first wheel and the second wheel are arranged in parallel along the left-right direction of the bicycle frame; when the baby carriage is in a folded state, the wheel assembly is in a second position, the wheel assembly is located in a space where the frame is located, and rotating shafts of the first wheel and the second wheel are arranged in parallel or in a collinear mode along the front-back direction of the frame.

Example two

Referring to fig. 7 to 14, which have an open state and a folded state, the folding buggy comprises a frame and a wheel assembly, the frame comprises a chassis, the wheel assembly is connected with the chassis, the chassis comprises a first chassis 210 and a second chassis 220 which are rotatably connected at the inner sides, when the folding buggy is in the open state, the first chassis 210 and the second chassis 220 are mutually unfolded and basically positioned on the same plane, together forming a supporting surface for children to sit, and when the folding buggy is in the folded state, the first chassis 210 and the second chassis 220 are mutually rotated and closed.

The wheel assembly includes a first wheel assembly 250 rotatably coupled to the first chassis 210, and a second wheel assembly 260 rotatably coupled to the second chassis 220, and the first wheel assembly 250 and the second wheel assembly 260 each have a first position and a second position by rotating themselves, the first position being below the chassis, and the second position being inside the chassis. The folding buggy further comprises a connection assembly comprising a first drive member 271 which is relatively slidably connected to both the first chassis 210 and the first wheel assembly 250, a second drive member 281 which is relatively slidably connected to both the second chassis 220 and the second wheel assembly 260, the first wheel assembly 250 and the second wheel assembly 260 each being in a first position when the folding buggy is in the open condition, the first wheel assembly 250 and the second wheel assembly 260 being rotated to a second position by sliding of the first drive member 271 and the second drive member 281, respectively, when the folding buggy is in the folded condition.

Specifically, the first chassis 210 and the second chassis 220 are provided with long straight grooves extending in the front-rear direction, the first wheel assembly 250 is provided with a first spiral groove 2511, and one end of the first driving member 271 slides in the long straight grooves and the first spiral groove 2511. More specifically, the first wheel assembly 250 includes a first sleeve 251 pivotally connected to the first chassis 210, a first joint 252 connected to the first sleeve 251, and a first wheel 253 rotatably connected to the first joint 252, wherein a first spiral groove 2511 is formed on the first sleeve 251, and the first joint 520 and the first sleeve 510 may be fixedly connected or integrally formed, or may be pivotally connected to enable the first wheel 530 to rotate universally. Similarly, the second wheel assembly 260 is provided with a second spiral groove 2611, and one end of the second driving member 281 slides in the long straight groove and the second spiral groove 2611. Also more specifically, the second wheel assembly 260 includes a second sleeve 261 pivotally connected to the second chassis 220, a second joint 262 connected to the second sleeve 261, and a second wheel 263 rotatably connected to the second joint 262, and a second spiral groove 2611 is opened on the second sleeve 261.

In a preferred embodiment, the connecting assembly is connected to the first chassis 210 and the second chassis 220, respectively, and is actuated by the mutual rotation of the first chassis 210 and the second chassis 220.

In this embodiment, the connection assembly includes a first connection assembly and a second connection assembly. The first connecting assembly comprises a first sliding frame 270 connected with the first chassis 210 in a sliding manner, a first connecting rod 291 with one end rotatably connected with the second chassis 220 and the other end rotatably connected with the first sliding frame 270, and a first driving member 271 is fixedly connected with the first sliding frame 270; the first chassis 210, the second chassis 220, the first link 291, and the first carriage 270 constitute a slider-crank mechanism. Similarly, the second connecting assembly includes a second sliding frame 280 slidably connected to the second chassis 220, a second connecting rod 292 having one end rotatably connected to the first chassis 210 and the other end rotatably connected to the second sliding frame 280, and a second driving member 281 fixedly connected to the second sliding frame 280; the first base frame 210, the second base frame 220, the second link 292, and the second slide frame 280 constitute a crank slider mechanism. Specifically, the first link 291 and the second link 292 are two each and are disposed on the left and right sides of the folding child car, respectively.

The folding child's vehicle in this embodiment further includes a first side frame 230 pivotally connected to the outside of the first chassis 210, a second side frame 240 pivotally connected to the outside of the second chassis 220, a first side link 293 pivotally connected at one end to the first carriage 270 and pivotally connected at the other end to the first side frame 230, and a second side link 294 pivotally connected at one end to the second carriage 280 and pivotally connected at the other end to the second side frame 240. The first side link 293, the first sliding frame 270, the first base frame 210 and the first side frame 230 form a slider-crank mechanism; the second side link 294, the second sliding frame 280, the second base frame 220, and the second side frame 240 constitute a crank slider mechanism. The first side frame 230 and the second side frame 240 are arranged perpendicular to the first chassis 110 and the second chassis 120, respectively, when the folding buggy is in the open state, and the first side frame 230 and the second side frame 240 are drawn close to the first chassis 210 and the second chassis 220, respectively, when the folding buggy is in the folded state. The first connecting rod 291, the second connecting rod 292, the first side connecting rod 293 and the second side connecting rod 294 are respectively two and are respectively arranged at the left side and the right side of the folding child car.

The working principle is as follows:

when the folding is performed, the first chassis 210 and the second chassis 220 rotate relatively and approach each other, the joint between the two moves upward, and under the driving of the relative rotation of the two, the crank slider mechanism formed by the first chassis 210, the second chassis 220, the first link 291 and the first sliding frame 270 and the crank slider mechanism formed by the first chassis 210, the second chassis 220, the second link 292 and the second sliding frame 280 operate simultaneously, so that the first sliding frame 270 and the second sliding frame 280 move inward, the first driving element 271 and the second driving element 281 slide in the first spiral groove 2511 and the second spiral groove 2611 respectively, under the interaction between the first driving element 271 and the first spiral grooves 2511 on the left and right sides, the first wheel assemblies 250 on the left and right sides rotate simultaneously and turn over toward the inner side of the first chassis 210, and under the interaction between the second driving element 281 and the second spiral grooves 2611 on the left and right sides, the second wheel assemblies 260 on the left and right sides are simultaneously rotated and turned toward the inner side of the second base frame 220, thereby achieving folding and gathering of the first wheel assemblies 250 and the second wheel assemblies 260. Meanwhile, under the driving of the first sliding frame 270 and the second sliding frame 280, the crank-slider mechanism formed by the first side link 293, the first sliding frame 270, the first bottom frame 210 and the first side frame 230 and the crank-slider mechanism formed by the second side link 294, the second sliding frame 280, the second bottom frame 220 and the second side frame 240 operate simultaneously, and under the driving of the first side link 293 and the second side link 294, the first side frame 230 and the second side frame 240 rotate and approach to the first bottom frame 210 and the second bottom frame 220 respectively. Until all the parts are folded to form a flat shape, and the whole vehicle is folded.

In this embodiment, a cloth cover 300 is enclosed between the first side frame 230, the second side frame 240 and the chassis, so as to form a hollow accommodating space. When the folding child vehicle is in an opening state, the wheel assembly is in a first position, the wheel assembly is positioned below the chassis and outside the space where the vehicle frame is positioned, and the rotating shafts of the first wheel 253 and the second wheel 263 are arranged in parallel with each other along the left-right direction of the vehicle frame; when the stroller is in the collapsed position, the wheel assembly is in the second position, in which the wheel assembly is within the space of the frame, and the axes of rotation of the first and second wheels 253, 263 are parallel or collinear with each other in the fore-and-aft direction of the frame. The folding child's bike in the above embodiment is folded by the structural design, and the wheels are turned to the inner side of the chassis, so that the whole bike is flat, the occupied space is greatly reduced, and the folding child's bike is very convenient to store and carry.

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 (10)

1. The utility model provides a folding child's bike, its has open mode and fold condition, folding child's bike include the chassis, with the wheel subassembly that the chassis is connected, the chassis includes inboard first chassis and the second chassis of rotating the connection mutually, works as when folding child's bike is in fold condition, first chassis and second chassis rotation each other are drawn close its characterized in that: the wheel assembly comprises a first wheel assembly rotationally connected with the first chassis and a second wheel assembly rotationally connected with the second chassis, the first wheel assembly and the second wheel assembly are respectively provided with a first position and a second position through self rotation, the first position is arranged below the chassis, the second position is arranged at the inner side of the chassis,

folding child's bike still include with coupling assembling that wheel subassembly and chassis are connected works as folding child's bike is when the open mode, first wheel subassembly and second wheel subassembly all are located the first position, works as folding child's bike is when fold condition, first wheel subassembly and second wheel subassembly are in drive and rotate to the second position when coupling assembling, first chassis and the mutual folding of second chassis.

2. The folding child's vehicle of claim 1, characterized in that: the connecting assembly comprises a first driving piece and a second driving piece, wherein the first driving piece and the first wheel assembly are connected with each other in a relatively sliding mode, the second driving piece and the second wheel assembly are connected with each other in a relatively sliding mode, and when the folding buggy is in a folded state, the first wheel assembly and the second wheel assembly are driven to rotate to a second position through the sliding of the first driving piece and the second driving piece respectively.

3. The folding child's vehicle of claim 2, characterized in that: the first wheel assembly is provided with a first spiral groove, and the first driving piece is in sliding connection with the first spiral groove; the second wheel assembly is provided with a second spiral groove, and the second driving piece is in sliding connection with the second spiral groove.

4. The folding child's vehicle of claim 3, characterized in that: the first wheel assembly comprises a first sleeve which is pivotally connected to the first chassis, a first joint which is connected with the first sleeve and a first wheel which is rotatably connected to the first joint, and the first spiral groove is formed in the first sleeve; the second wheel assembly comprises a second sleeve which is pivotally connected to the second chassis, a second joint which is connected with the second sleeve, and a second wheel which is rotatably connected to the second joint, and the second spiral groove is formed in the second sleeve.

5. The folding child's vehicle of claim 2, characterized in that: coupling assembling still include the lower part with first side lever (170), the lower part that first chassis phase rotation is connected with second side lever (180) that second chassis phase rotation is connected, the upper portion of first side lever (170) with the upper portion of second side lever (180) is connected mutually, the one end of first driving piece with first side lever (170) phase rotation be connected and the other end with first chassis looks sliding connection, the one end of second driving piece with second side lever (180) phase rotation be connected and the other end with second chassis looks sliding connection.

6. The folding child's vehicle of claim 5, characterized in that: the folding child car further comprises an upper joint (173) rotatably connected with the upper portions of the first side bar (170) and the second side bar (180) in the same shaft, a first upper frame (130) and a second upper frame (140) of which the inner sides are rotatably connected with the upper joint (173), a first upper connecting rod (172) of which the upper end is rotatably connected with the first upper frame (130) and of which the lower end is rotatably connected with the first side bar (170), and a second upper connecting rod (182) of which the upper end is rotatably connected with the second upper frame (140) and of which the lower end is rotatably connected with the second side bar (180).

7. The folding child's vehicle of claim 6, characterized in that: first side lever (170), second side lever (180), first upper connecting rod (172), second upper connecting rod (182), first top connection (173) respectively have two and set up symmetrically the left and right sides of folding perambulator is when opening the state, first upper ledge (130) and second upper ledge (140) are located respectively first chassis with directly over the second chassis, work as folding perambulator is when fold condition, first upper ledge (130) and second upper ledge (140) draw close in respectively first chassis with the second chassis.

8. The folding child's vehicle of claim 2, characterized in that: coupling assembling still include with first carriage (270), one end of first chassis looks sliding connection with second chassis (220) rotate mutually and be connected and the other end with first carriage (270) rotate mutually first connecting rod (291) of connecting, with second carriage (220) looks sliding connection's second carriage (280), one end with first chassis (210) rotate mutually and be connected and the other end with second carriage (280) rotate mutually second connecting rod (292) of connecting, first driving piece and second driving piece fixed connection respectively on first carriage (270) and second carriage (280).

9. The folding child's vehicle of claim 8, characterized in that: the folding child's bike further comprises a first side frame (230) rotatably connected with the outer side of the first underframe, a second side frame (240) rotatably connected with the outer side of the second underframe, a first side connecting rod (293) with one end rotatably connected with the first sliding frame (270) and the other end rotatably connected with the first side frame (230), and a second side connecting rod (294) with one end rotatably connected with the second sliding frame (280) and the other end rotatably connected with the second side frame (240).

10. The folding child's vehicle of claim 9, characterized in that: first connecting rod (291), second connecting rod (292), first side connecting rod (293), second side connecting rod (294) respectively have two and set up respectively the left and right sides of folding perambulator, work as when folding perambulator is opening state, first side frame (230) and second side frame (240) perpendicular to respectively first chassis and second chassis set up, work as folding perambulator is when fold condition, first side frame (230) and second side frame (240) draw close in respectively first chassis and second chassis.

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