CN113184036B - Children's barrow - Google Patents

Abstract

The invention discloses a children's barrow, which comprises a barrow frame, a front seat assembly, a rear seat assembly, a front wheel assembly and a rear wheel assembly, wherein the front seat assembly and the rear seat assembly are movably arranged on the stroller frame, the stroller frame comprises a front support and a rear support rotationally connected with the front support, the front wheel assembly comprises a front wheel connector arranged at the lower part of the front support and a front wheel rotationally arranged on the front wheel connector, the front wheel connector is provided with a wheel shaft, the children's barrow has single-person and double-person use states, when the children's barrow is switched between the single-person and double-person use states, the front support rotates relative to the rear support, and the wheel shaft of the children's barrow is vertical to the ground in the single-person and double-person use states. This children's shallow when changing between single and double user state, preceding seat subassembly slides along the fore-and-aft direction, can drive the relative after-poppet of fore-stock and rotate to order about the relative fore-stock rotation of front wheel joint, thereby make the shaft homoenergetic perpendicular to ground of front wheel joint under single and double user state, in order to reduce the resistance of children's shallow when marcing.

Description

a children's stroller

technical field

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

Background technique

The stroller provides great convenience for adults to carry smaller children for outdoor activities. There are more and more families with two children. In order to carry two children for outdoor activities at the same time, the stroller needs to be used by two people. And when only one child is carried for outdoor activities, the stroller can be converted into a single-use state. In order to reduce the resistance of the stroller when it travels, it is required that the axle of the front wheel joint of the stroller can be perpendicular to the ground when the stroller is in single-use state and double-use state.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a stroller, the wheel axle of the front wheel joint can be perpendicular to the ground when the stroller is in single use state and double use state.

For achieving the above object, the technical scheme adopted in the present invention is:

A child stroller includes a stroller frame, a front seat assembly and a rear seat assembly respectively movably arranged on the stroller frame, a front wheel assembly arranged at the bottom front of the stroller frame, and a The rear wheel assembly at the bottom rear of the cart frame, the cart frame includes a front bracket and a rear bracket, the upper part of the front bracket is rotatably connected with the upper part of the rear bracket, and the front wheel assembly includes a set of the front wheel joint at the lower part of the front bracket and the front wheel rotatably arranged on the front wheel joint, the front wheel joint has an axle, the stroller has a single-use state and a double-use state, When the stroller is switched between the single-use state and the double-use state, the front bracket rotates relative to the rear bracket, and the wheel axle of the stroller is in the single-use state and the double-use state are perpendicular to the ground.

Preferably, the front wheel joint is rotatably connected to the lower part of the front bracket, and the stroller further includes a function for driving the front wheel when the stroller is switched between a single-use state and a double-use state. A drive mechanism for a wheel joint to rotate relative to the front bracket so that the wheel axles are all perpendicular to the ground.

Further, the rotating shaft rotatably connected to the front wheel joint and the front bracket vertically intersects with the wheel shaft.

Further, the front seat assembly includes a seat post assembly that can be extended and retracted in the front-rear direction, and the front part of the seat post assembly is rotatably connected to the front bracket, when the stroller is in a single-use state and a double-use state. When converting between them, the seat post assembly is telescopic and causes the front bracket to rotate relative to the rear bracket.

Further, the seat post assembly includes a rear seat post and a front seat post extending in the front-rear direction, the front part of the front seat post is rotatably connected with the front bracket, and the front seat post can extend along the length of the rear seat post A direction is slidably provided on the rear seatpost.

Further, the driving mechanism includes a front link, one end of the front link is rotatably connected to the front seat post, and the other end of the front link is rotatably connected to the front wheel joint.

Further, the front seat assembly further comprises a front seat pocket or a front seat panel, the front seat pocket or the front seat panel is fixedly arranged on the front seat post, or the front seat pocket or the front seat panel is slidably arranged in the front and rear directions. on the front seatpost.

In a specific embodiment, the front seat pocket or the front seat panel is slidably disposed on the front seat post along the front-rear direction. When the stroller is switched from a single-use state to a double-use state, the front seat Or the front seat plate slides forward relative to the front seat post, and when the stroller is switched from the double use state to the single use state, the front seat pocket or the front seat plate slides backward relative to the front seat post.

Further, the rear seat assembly includes a rear seat plate, when the stroller is in a single-use state, the rear seat plate is accommodated under the seat post assembly, and when the stroller is in a double-use state, the rear seat plate is accommodated under the seat post assembly In the state, the rear seat plate is located behind the seat post assembly.

Preferably, the cart frame further comprises a push rod assembly, a side armrest and a rear link, two of the upper part of the front bracket, the upper part of the rear bracket and the front part of the side armrest The components are rotatably connected, the third component is rotatably connected with any one of the aforementioned two components, or the above three components are rotatably connected coaxially, the rear part of the side armrest is rotatably connected with the push rod assembly, and the rear One end of the connecting rod is rotatably connected with the lower part of the push rod assembly, and the other end of the rear connecting rod is rotatably connected with the rear bracket. The seat post assembly includes a rear seat post and a front seat post that is slidably disposed on the rear seat post along the front-rear direction, the front seat post is rotatably connected to the front bracket, and the rear seat assembly includes a rear seat plate, so Two of the three parts of the rear seat plate, the lower part of the push rod assembly and the rear part of the rear seat post are rotatably connected, and the third part is rotatably connected to any one of the aforementioned two parts, or The above three components are connected in a coaxial rotation.

Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art: the child stroller of the present invention is provided with a driving mechanism between the front seat assembly and the front wheel joint, and when the child stroller is in a single-use state and When switching between the two-person use states, the front seat assembly slides in the front and rear directions, which can drive the front bracket to rotate relative to the rear bracket, and the front wheel joint can be driven to rotate relative to the front bracket through the driving mechanism, so that the stroller can be used in a single-person state and a double-person use state. When in use, the axles of the front wheel joints can be perpendicular to the ground to reduce the resistance of the stroller when traveling.

Description of drawings

Accompanying drawing 1 is the three-dimensional schematic diagram of the children's stroller that can be switched between single and double of the present embodiment in the unfolded state (the double use state, the front link on one side is removed, and the front wheel assembly on one side and the front bracket are in a disassembled state. );

FIG. 2 is a schematic side view of the child stroller that can be switched between single and double according to the present embodiment in an unfolded state (two-person use state);

3 is a schematic cross-sectional view of the child stroller capable of single-double conversion according to the present embodiment in an unfolded state (two-person use state);

FIG. 4 is a three-dimensional schematic diagram of the child stroller capable of single-double conversion according to the present embodiment in the unfolded state (during the single-double conversion process);

5 is a schematic side view of the stroller capable of single-double conversion according to the present embodiment in an unfolded state (during single-double conversion);

6 is a schematic cross-sectional view of the child stroller capable of single-double conversion according to the present embodiment in an unfolded state (during single-double conversion);

FIG. 7 is a three-dimensional schematic diagram of the children's stroller that can be switched between single and double according to the present embodiment in an unfolded state (single-person use state);

FIG. 8 is a schematic side view of the stroller that can be switched between single and double according to the present embodiment in an unfolded state (single-person use state);

9 is a side partial exploded view of the children's stroller that can be converted to single and double according to the present embodiment;

Figure 10 is a perspective partial exploded view of the children's stroller that can be switched between single and double according to the present embodiment;

FIG. 11 is a perspective view of the child stroller that can be converted to single and double according to the embodiment during the folding process (the front seat assembly is folded);

Figure 12 is a schematic side view of the child stroller that can be converted to single and double according to the embodiment during the folding process (the front seat assembly is folded);

Figure 13 is a three-dimensional schematic diagram of the children's stroller that can be converted to single and double according to the embodiment during the folding process (the stroller frame is folded);

14 is a schematic side view of the child stroller that can be converted to single and double according to the embodiment during the folding process (the stroller frame is folded);

FIG. 15 is a schematic perspective view of the children's stroller that can be switched between single and double according to the present embodiment in a folded state;

FIG. 16 is a schematic side view of the children's stroller that can be converted to single and double according to the present embodiment in a folded state.

Among them: 11, front bracket; 12, rear bracket; 13, push rod assembly; 131, lower push rod; 132, upper push rod; 14, side armrest; 15, rear link; 21, front seat pocket or front seat plate; 211 , slotted; 22, rear seat post; 221, chute; 23, front seat post; 231, first convex part; 232, second convex part; 31, rear seat plate; 32, extension rod; 4, conversion link ;51, front wheel joint; 511, axle; 52, front wheel; 61, rear wheel joint; 62, rear wheel; 71, first axle; 72, second axle; 73, third axle; 74, fourth axle ; 75, the fifth axis; 76, the sixth axis; 8, the front link.

Detailed ways

The technical solutions of the present invention will be further elaborated below with reference to the accompanying drawings and specific embodiments.

As shown in FIGS. 1 to 16 , the single-double convertible stroller of the present invention includes a stroller frame with unfolded and folded states, a front wheel assembly, a rear wheel assembly, a front seat assembly and a rear seat assembly.

The cart frame includes a front bracket 11 , a rear bracket 12 , a push rod assembly 13 , a side armrest 14 and a rear link 15 . The front wheel assembly is arranged at the lower part of the front bracket 11 , the rear wheel assembly is arranged at the lower part of the rear bracket 12 , the upper part of the front bracket 11 , the upper part of the rear bracket 12 and the front part of the side armrest 14 Two of the three parts are rotatably connected , the third part is rotationally connected with any one of the aforementioned two components, or the above-mentioned three components are connected in a coaxial rotation. The three parts are connected coaxially and rotatably through the first shaft 71 . The rear portion of the side armrest 14 is rotatably connected with the push rod assembly 13 . One end of the rear link 15 is rotatably connected to the lower part of the push rod assembly 13 , and the other end of the rear link 15 is rotatably connected to the rear bracket 12 . In this way, a four-bar linkage is formed between the side armrest 14 , the rear bracket 12 , the rear link 15 and the push rod assembly 13 .

In this embodiment, the push rod assembly 13 includes a lower push rod 131 and an upper push rod 132 that is slidably disposed on the lower push rod 131 along the lengthwise extending direction of the lower push rod 131 . Specifically, the lower push rod 131 is provided with a lumen extending along the length direction thereof, and the upper push rod 132 is partially inserted in the lumen and slidably disposed along the lengthwise extending direction of the lumen. The rear part of the side armrest 14 is rotatably connected with the lower push rod 131 , and one end of the rear link 15 is rotatably connected with the lower part of the lower push rod 131 .

The front wheel assembly includes a front wheel joint 51 and a front wheel 52 , the front wheel joint 51 is arranged at the lower part of the front bracket 11 , and the front wheel 52 is rotatably arranged on the front wheel joint 51 .

The rear wheel assembly includes a rear wheel joint 61 and a rear wheel 62 , the rear wheel joint 61 is fixedly arranged on the lower part of the rear bracket 12 , and the rear wheel 62 is rotatably arranged on the rear wheel joint 61 .

Both the front seat assembly and the rear seat assembly are movably arranged on the frame of the cart, and the movement here refers to turning or sliding. Specifically, the front seat assembly includes a front seat pocket or a front seat panel 21, and when the stroller frame is in an unfolded state, the front seat pocket or the front seat panel 21 can slide in the front-rear direction. The rear seat assembly includes a rear seat panel 31 , and the rear seat panel 31 is rotatably disposed relative to the push rod assembly 13 .

The front seat assembly further includes a seatpost assembly, and the seatpost assembly can be retracted and retracted in the front-rear direction, that is, the front seat assembly can be retracted and retracted in the front-rear direction. The specific seat post assembly includes a rear seat post 22 extending in the front-rear direction and a front seat post 23 slidably provided on the rear seat post 22 along the lengthwise extending direction of the rear seat post 22, and a front seat pocket or front seat plate 21 is provided on the front seat post 23 on. The relative sliding between the front seat post 23 and the rear seat post 22 can make the seat post assembly extend and retract in the front-rear direction, and can drive the front seat pocket or the front seat plate 21 to slide relative to the cart frame in the front-rear direction.

The front seat post 23 is provided with a first protruding portion 231 , and the rear seat post 22 is provided with a chute 221 extending in the front-rear direction. The first protruding portion 231 is located in and matched with the chute 221 . When the seat post assembly extends and retracts in the front-rear direction, the first convex portion 231 and the chute 221 cooperate to guide the extension and retraction direction of the seat post assembly, and at the same time, the maximum length of the seat post assembly when extended and the minimum length when retracted are limited. .

The front seat pocket or the front seat panel 21 may be fixedly arranged on the front seat post 23 or may be slidably arranged on the front seat post 23 in the front-rear direction. Preferably, the front seat pocket or the front seat panel 21 is slidably disposed on the front seat post 23 in the front-rear direction, so that the sliding stroke of the front seat pocket or the front seat panel 21 in the front-rear direction can be increased.

The front seat post 23 is also provided with a second convex portion 232, the bottom of the front seat pocket or the front seat plate 21 is provided with a lumen extending in the front-rear direction, and the side wall of the lumen is provided with a slot extending through the lumen and extending in the front-rear direction. 211 , the front seat post 23 partially protrudes into the lumen, and the second protrusion 232 on the front seat post 23 is located in the slot 211 and is matched with the slot 211 . When the front seat pocket or the front seat panel 21 slides in the front-rear direction relative to the front seat post 23 , the sliding of the front seat pocket or the front seat panel 21 is guided by the cooperation of the second convex portion 232 and the slot 211 , and at the same time, the front seat pocket or the front seat panel 21 is guided relative to the front seat. The sliding distance of the rod 23 is limited.

Two of the three lower parts of the rear seat plate 31, the rear seat post 22 and the lower push rod 131 are rotatably connected, and the third part is rotatably connected with any one of the foregoing two parts, or the above three parts are the same. Shaft rotation connection. In this embodiment, the four components of the rear seat plate 31 , the rear seat post 22 , the lower part of the lower push rod 131 and the one end of the rear link 15 are connected by coaxial rotation through the second shaft 72 .

The stroller has a single-use state and a double-use state. When the stroller is in a double-use state, the rear seat plate 31 is located behind the seat post assembly, and the front seat assembly and the rear seat assembly respectively form a seating area for children to ride on , as shown in Figure 1 to Figure 3.

When the stroller is in a single-use state, the rear seat panel 31 is accommodated under the seat post assembly, and the front seat assembly forms an area for children to ride, as shown in FIGS. 7 and 8 .

When the stroller is switched between the single-use state and the double-use state, the seat post assembly is telescopic, the front seat pocket or front seat panel 21 slides relative to the front seat post 23 , and the rear seat panel 31 rotates relative to the push rod assembly 13 . When one of the front seat pockets or the front seat panel 21 and the rear seat panel 31 moves relative to the stroller frame, the other component can be driven by the link mechanism to move synchronously relative to the stroller frame, so that the stroller can be Switching between the double-use state and the single-use state makes the stroller easy to switch between the single-use state and the double-use state, which is convenient for the child's stroller to use.

The link mechanism is provided between the front seat pocket or front seat panel 21 and the rear seat panel 31 . Specifically, the link mechanism includes a conversion link 4 , one end of the conversion link 4 is rotatably connected to the front seat pocket or the front seat panel 21 , and the other end of the conversion link 4 is rotatably connected to the rear seat panel 31 . In this embodiment, the rear seat assembly further includes an extension rod 32 extending outward from the connection between the rear seat panel 31 and the lower part of the lower push rod 131 and the rear seat post 22 , and the other end of the conversion link 4 and the extension rod 32 Turn the connection. When the rear seat plate 31 rotates relative to the push rod assembly 13, the front seat pocket or the front seat plate 21 is driven to slide relative to the front seat post 23 through the conversion link 4. When the second convex portion 232 abuts against one end of the slot 211, the rear seat When the plate 31 continues to rotate relative to the push rod assembly 13 , the front seat pocket or the front seat plate 21 can be driven by the conversion link 4 to drive the front seat post 23 to slide relative to the rear seat post 22 synchronously.

The front portion of the front seat post 23 is rotatably connected to the front bracket 11 through a third shaft 73 . In this way, when the stroller is switched between the single-use state and the double-use state, the front seat post 23 slides in the front-rear direction relative to the rear seat post 22, thereby driving the front bracket 11 to rotate relative to the rear bracket 12, so that the front bracket 11 and the rear bracket 12 are rotated. The angle between the rear brackets 12 changes, that is, the distance between the front wheel 51 and the rear wheel 61 changes. When the stroller is in the state of double use, a first distance is formed between the front wheel 51 and the rear wheel 61, and when the stroller is in the state of single use, a second distance is formed between the front wheel 51 and the rear wheel 61, the first distance is The first distance is greater than the second distance.

The front wheel joint 51 has an axle 511. In order to reduce the resistance of the stroller when the stroller is in single use and double use, the wheel axis 511 is required to be perpendicular to the ground.

The front wheel joint 51 is rotatably connected to the front bracket 11 through a fourth shaft 74 , and the fourth shaft 74 is perpendicular to the wheel shaft 511 . The stroller also includes a drive mechanism. When the stroller is switched between the single-use state and the double-use state, the front wheel joint 51 can be driven to rotate relative to the front bracket 11 by the drive mechanism, so that the wheel axle 511 is in the single-use state. It is perpendicular to the ground in the state of double use.

Specifically, the driving mechanism includes a front link 8 , one end of the front link 8 is rotatably connected to the front seat post 23 through a fifth shaft 75 , and the other end of the front link 8 is rotatably connected to the front wheel joint 51 through a sixth shaft 76 . In this way, a four-bar linkage is formed between the front bracket 11, the front seat post 23, the front link 8 and the front wheel joint 51. When the stroller is switched between the single-use state and the double-use state, the front seat post 23 drives the When the front bracket 11 is rotated, the front wheel joint 51 can be pulled to rotate relative to the front bracket 11 through the four-bar linkage mechanism.

The stroller has unfolded and folded states. When the stroller is in the unfolded state and in the double-use state, most of the upper push rod 132 extends out of the lumen of the lower push rod 131; the front seat post 23 is opposite to the rear seat post. 22 slides forward to the maximum stroke position, that is, the first convex portion 231 abuts against the front end of the chute 221; the front seat pocket or front seat plate 21 slides to the maximum stroke position relative to the front seat post 23, that is, the second convex portion 232 and The rear end of the slot 211 is arranged against each other; the rear seat panel 31 is located behind the front seat pocket or the front seat panel 21; The fourth shaft 74 is located in front of the sixth shaft 76 , as shown in FIGS. 1 to 3 .

When the stroller needs to be converted from the double-use state to the single-use state in the unfolded state, the rear seat panel 31 is rotated downward and forward around the second axis 72, and the front seat pocket or the front seat panel 21 is pulled through the conversion link 4 to face the front seat panel 21. The front seat post 23 slides backward. When the second convex portion 232 abuts against the front end of the slot 211 and the rear seat plate 31 continues to rotate around the second axis 72 , the front seat pocket or the front seat plate 21 can be pulled through the conversion link 4 The front seat post 23 is driven to slide backward relative to the rear seat post 22 synchronously, as shown in FIG. 4 to FIG. 6 , until the first convex portion 231 and the rear end of the chute 221 are set against each other, the stroller is in a single-use state. , at this time, the rear seat plate 31 is rotated to be located below the seat post assembly, as shown in FIG. 7 and FIG. 8 .

When the stroller needs to be converted from the single-use state to the double-use state in the unfolded state, the rear seat panel 31 is rotated backward and upward around the second axis 72, and the front seat pocket or the front seat panel 21 is pushed relative to the front seat through the conversion link 4 The rod 23 slides forward, and when the second protrusion 232 abuts against the rear end of the slot 211, and the rear seat panel 31 continues to rotate around the second axis 72, the front seat pocket or the front seat panel 21 can be pushed through the conversion link 4 The front seat post 23 is driven to slide forward relative to the rear seat post 22 synchronously until the stroller is in a double-use state.

When the stroller is folded, first convert the stroller to a single-use state; fold the front seat pockets, as shown in Figure 11 and Figure 12; after the front seat pockets are folded, fold the stroller frame, and when folding, push up first The rod 132 is slid down and retracted into the lumen of the lower push rod 131, so that the push rod assembly 13 moves forward and downward to be close to the rear bracket 12, and the front bracket 11 is pulled by the seat post assembly to rotate backward to match the rear bracket 12. Move closer, and drive the front wheel joint 51 to rotate relative to the front bracket 11 through the four-bar linkage mechanism formed between the front bracket 11, the front seat post 23, the front link 8 and the front wheel joint 51. The folding process of the cart frame is shown in Figure 13 As shown in Figure 14, until the rods that make up the frame of the stroller and the components of the stroller are close together, and finally folded as shown in Figures 15 and 16, the child has a compact structure, small volume, and is folded. Can stand on the ground, easy to carry and store.

The above-mentioned embodiments are only intended to illustrate the technical concept and characteristics of the present invention, and the purpose thereof is to enable those who are familiar with the art to understand the content of the present invention and implement them accordingly, and cannot limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be included within the protection scope of the present invention.

Claims (10)

1. A child stroller, comprising a stroller frame, a front seat assembly and a rear seat assembly respectively movably arranged on the stroller frame, and a front wheel assembly arranged at the bottom front of the stroller frame and a rear wheel assembly arranged at the bottom rear of the cart frame, the cart frame includes a front bracket and a rear bracket, the upper part of the front bracket is rotatably connected with the upper part of the rear bracket, and the front wheel assembly It includes a front wheel joint disposed at the lower part of the front bracket and a front wheel rotatably disposed on the front wheel joint, characterized in that the front wheel joint has an axle, and the stroller has a single-use state and double-use state, when the stroller is switched between the single-use state and the double-use state, the front bracket rotates relative to the rear bracket, the stroller is in the single-use state and the double-use state In the state of use, the axles are all perpendicular to the ground. 2 . The stroller according to claim 1 , wherein the front wheel joint is rotatably connected to the lower part of the front bracket, and the stroller further comprises the stroller in a single-use state and a A driving mechanism for driving the front wheel joint to rotate relative to the front bracket so that the wheel axles are both perpendicular to the ground when the two-person use states are switched to each other. 3 . The stroller according to claim 2 , wherein the rotating shaft of the front wheel joint and the front bracket rotatably connected is perpendicular to the wheel shaft. 3 . 4 . The stroller according to claim 2 , wherein the front seat assembly comprises a seat post assembly that can be extended and retracted in the front-rear direction, the front part of the seat post assembly is rotatably connected with the front bracket, and when When the stroller is switched between the single-use state and the double-use state, the seat post assembly is extended and retracted so that the front bracket rotates relative to the rear bracket. 5 . The stroller according to claim 4 , wherein the seat post assembly comprises a rear seat post and a front seat post extending in the front-rear direction, and the front part of the front seat post is rotatably connected with the front bracket, 5 . The front seat post is slidably provided on the rear seat post along a lengthwise extending direction of the rear seat post. 6 . The stroller according to claim 5 , wherein the driving mechanism comprises a front link, one end of the front link is rotatably connected to the front seat post, and the other end of the front link is rotatably connected. 7 . The part is rotatably connected with the front wheel joint. 7 . The stroller according to claim 5 , wherein the front seat assembly further comprises a front seat pocket or a front seat panel, and the front seat pocket or front seat panel is fixedly arranged on the front seat post, or the front seat A pocket or a front seat panel is provided on the front seat post so as to be slidable in the front-rear direction. 8 . The stroller according to claim 7 , wherein the front seat pocket or the front seat panel is slidably disposed on the front seat post in the front-rear direction, and when the stroller is in a single-use state to the When the double use state is converted, the front seat pocket or the front seat panel slides forward relative to the front seat post, and when the stroller is converted from the double use state to the single use state, the front seat pocket or the front seat panel is relatively The front seatpost slides back. 9 . The stroller of claim 4 , wherein the rear seat assembly includes a rear seat panel that is accommodated in the seat when the stroller is in a single-occupancy state. 10 . Below the rod assembly, when the stroller is in a double-use state, the rear seat plate is located behind the seat post assembly. 10. The stroller of claim 1, wherein the stroller frame further comprises a push rod assembly, a side armrest and a rear link, the upper part of the front bracket, the upper part of the rear bracket and the Two of the three parts in the front part of the side armrest are rotatably connected, and the third part is rotatably connected with any one of the aforementioned two parts, or the above three parts are coaxially rotatably connected. The rear part is rotatably connected with the push rod assembly, one end of the rear link is rotatably connected with the lower part of the push rod assembly, the other end of the rear link is rotatably connected with the rear bracket, and the front The seat assembly includes a seat post assembly that can be telescopic in the front-rear direction, the seat post assembly includes a rear seat post and a front seat post that can be slidably arranged on the rear seat post in the front-rear direction, the front seat post and the front bracket Rotationally connected, the rear seat assembly includes a rear seat panel, two of the three parts of the rear seat panel, the lower part of the push rod assembly and the rear part of the rear seat post are rotatably connected, and the third part It is rotatably connected to any one of the aforementioned two components, or the above-mentioned three components are coaxially rotatably connected.

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