Seat folding support and folding vehicle

Abstract

A seat folding support, comprising a support frame (11) and a seat base (12), wherein the support frame (11) comprises a first supporting member (111), two second supporting members (112), and a third supporting member (113), and an upper end of the first supporting member (111) is pivotally connected to a middle portion of a rear end of the seat base (12); the two second supporting members (112) are symmetrically arranged on both left and right sides of the first supporting member (111), the two second supporting members (112) are respectively arranged crosswise with the first supporting member (111), and middle portions of the two second supporting members are pivotally connected to each other; upper ends of the two second supporting members (112) are each pivotally connected to two sides of a lower end of the third supporting member (113); and an upper end of the third supporting member (113) is pivotally connected to a bottom surface of the seat base (12). The seat folding support uses a small number of rods, has a simple structure, and is both stylish and aesthetically pleasing. The present application further comprises a folding vehicle.

Description

Seat folding bracket and folding cart Technical Field

[0001] This application relates to a folding vehicle, and more particularly to a simple, stylish and attractive seat folding bracket and folding vehicle. Background Technology

[0002] Existing seat folding bracket structures typically involve installing a support frame under the seat to connect it to the frame. These support frames are symmetrically positioned on both sides of the seat; specifically, a cross-shaped support frame is placed on each side, forming a variable quadrilateral structure with the seat. When the frame is folded down, the seat and support frames fold along with the frame through the deformation of the quadrilateral structure. However, because existing seat folding brackets have at least three support rods on one side, the total number of rods on both sides is at least six. This large number of rods makes the folding bicycle appear to have numerous connection points, a complex connection structure, and many exposed rods, severely impacting the overall aesthetics of the vehicle.

[0003] Application content

[0004] The purpose of this application is to provide a folding chair bracket with a small number of rods, a simple structure, and a stylish and beautiful appearance.

[0005] Another objective of this application is to provide a folding bicycle with a simple structure and a stylish and attractive appearance.

[0006] To achieve the above objectives, the folding seat bracket provided in this application includes a support frame and a seat. The support frame includes a first support member, two second support members, and a third support member. The upper end of the first support member is pivotally connected to the middle of the rear end of the seat. The two second support members are symmetrically arranged on the left and right sides of the first support member, and the two second support members are respectively arranged crosswise with the first support member, with their middle parts pivotally connected to each other. The upper ends of the two second support members are pivotally connected to the lower ends of the third support member. The upper end of the third support member is pivotally connected to the bottom surface of the seat.

[0007] Compared with the prior art, this application sets up a first support member, two second support members, and a third support member. The two second support members are symmetrically arranged on the left and right sides of the first support member, and the upper end of the third support member is pivotally connected to the bottom surface of the chair seat and located between the upper ends of the two second support members. Thus, the first support member, the second support member, and the third support member can form a support frame for supporting the chair seat, and the three of them together with the chair seat form a deformable quadrilateral structure. Therefore, only four support members are needed on both sides of the chair seat to realize the unfolding or folding of the entire seat folding bracket. The number of support members is less than the number of rods used in the traditional way, the structure is simplified, and the overall appearance is more minimalist, stylish and beautiful.

[0008] Preferably, the pivot axis of the upper end of the third support member, which is pivotally connected to the seat, is located at the midpoint of the seat or between the center of the seat and the rear end of the seat. This allows the third support member to be positioned closer to the rear end of the seat. Therefore, when viewed from a normal angle, the front end of the seat can completely cover the lower third support member, resulting in a simpler and more aesthetically pleasing overall structure with a better visual effect.

[0009] Preferably, the bottom surface of the seat is provided with a receiving groove, and the third support member is received in the receiving groove when the folding frame is folded. By providing the receiving groove, the third support member can be received in the receiving groove when the seat folding bracket is folded, thereby making the structure more compact and reducing the volume of the seat folding bracket after folding.

[0010] Preferably, the seat folding bracket further includes a backrest folding mechanism, which is disposed at the rear end of the seat and connected to the first support member, and the first support member drives the backrest folding mechanism to open or fold relative to the seat.

[0011] Specifically, the backrest folding mechanism includes a backrest and a connecting rod. The lower ends of the backrest are pivotally connected to the rear ends of the chair seat on both sides. A receiving frame is provided in the middle of the rear end of the chair seat. The upper end of the first support member faces the bottom surface of the chair seat and extends outward and bent to form a pivot portion. One end of the connecting rod is pivotally connected to the pivot portion, and the other end of the connecting rod is pivotally connected to the middle of the lower end of the backrest. The pivot portion and the connecting rod are housed within the receiving frame. By providing a pivot portion at the upper end of the first support member and connecting the pivot portion to the backrest using the connecting rod, the backrest only needs one rod to achieve linkage with the support frame, simplifying the backrest structure. Furthermore, by providing a receiving frame in the middle of the rear end of the chair seat, the pivot portion and the connecting rod are hidden in the bottom of the rear end of the chair seat, making the overall structure look simpler and more aesthetically pleasing, with a better visual effect.

[0012] Specifically, the bottom surface of the chair seat has two parallel connecting beams extending in the front-rear direction. The rear section of each connecting beam protrudes downward to form a first pivot lug. A receiving frame is formed between the two first pivot lugs. The first support member extends into the receiving frame and is pivotally connected to the two first pivot lugs. By providing the connecting beams, the load-bearing strength of the chair seat can be improved. Furthermore, the rear end of the chair seat can form the receiving frame, allowing some of the rods to be stored internally, avoiding direct exposure and thus improving the visual effect.

[0013] Specifically, the rear ends of the two connecting beams extend upward to form second pivot lugs that are pivotally connected to the back of the beam. This conceals the connecting rod located between the two second pivot lugs, preventing it from being exposed from the side and further improving the visual effect.

[0014] Specifically, the side projection of the second support member has a bent structure; the lower section of the first support member extends obliquely from bottom to top and rear, and the upper section of the first support member extends backward along a direction deviating from the extension direction of the lower section.

[0015] Specifically, the side projection of the first support member has a bent structure; the lower section of the first support member extends obliquely from bottom to top and rear, and the upper section of the first support member extends backward along a direction deviating from the extension direction of the lower section.

[0016] Specifically, the middle section of the rear projection of the second support member has a bent structure relative to the upper and lower sections, so that the upper section of the second support member is closer to the middle position of the folding vehicle or closer to the first support member than the lower section.

[0017] A folding bicycle includes a front frame, a rear frame, and a seat folding bracket. The rear end of the front frame overlaps with the front end of the rear frame, and the lower side of the front frame is pivotally connected to the front end of the rear frame. The lower end of a first support member is pivotally connected to the middle of the rear end of the front frame, and the lower ends of two second support members are respectively pivotally connected to the two rear ends of the rear frame.

[0018] Preferably, the folding vehicle further includes a front wheel seat, a front wheel, and a rear wheel. The front wheel is respectively disposed on both sides of the front wheel seat, and the front wheel seat is disposed at the front end of the front frame. The rear wheel is respectively pivotally connected to the rear end of the rear frame or the lower end of the second support member.

[0019] Specifically, the folding frame also includes a pull rod, one end of which is pivotally connected to the front wheel seat and the other end of which is pivotally connected to the rear frame. Attached Figure Description

[0020] Figure 1 is a perspective view of the folding vehicle of this application when fully unfolded.

[0021] Figure 2 is a side view of the folding vehicle of this application when fully unfolded.

[0022] Figure 3 is a rear view of the folding vehicle of this application.

[0023] Figure 4 is a cross-sectional view of the folding vehicle of this application.

[0024] Figure 5 is an exploded view of the seat folding bracket of the folding vehicle of this application.

[0025] Figure 6 is a structural diagram of the surface of the seat of the folding vehicle of this application.

[0026] Figure 7 is a structural diagram of the bottom surface of the seat of the folding vehicle of this application.

[0027] Figure 8 is a diagram showing the state of the folding vehicle of this application when it is half-folded.

[0028] Figure 9 shows the state of the folding vehicle after it is fully folded. Detailed Implementation

[0029] To illustrate the technical content, structural features, and effects of this application in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0030] As shown in Figures 1 to 5, the folding bicycle 100 of this application includes a seat folding bracket 1, a front frame 2, and a rear frame 3. The seat folding bracket 1 includes a support frame 11 and a seat 12. The support frame 11 includes a first support member 111, two second support members 112, and a third support member 113. The upper end of the first support member 111 is pivotally connected to the middle of the rear end of the seat 12, with the pivot axis being A. The two second support members 112 are symmetrically arranged on the left and right sides of the first support member 111, i.e., the first support member 111 is located between the two second support members 112. The two second support members 112 are respectively arranged crosswise with the first support member 111, and their middle parts are pivotally connected to each other, with the pivot axis being O. More specifically, please refer to the side view of the folding cart 100 in Figure 2. The side projections of the first support member 111 and the second support member 112 are both bent structures. The section below the pivot point where the first support member 111 and the second support member 112 are pivotally connected is the lower section, and the section above the pivot point is the upper section. The lower section of the first support member 111 extends obliquely upwards and backwards, while the upper section of the first support member 111 bends and extends backwards along a direction deviating from the extension direction of the lower section. The lower section of the second support member 112 extends obliquely upwards and forwards, while the upper section of the second support member 112 bends and extends backwards along a direction deviating from the extension direction of the lower section. The upper ends of the two second support members 112 are respectively pivotally connected to the lower ends of the third support member 113 on both sides, with the pivot axis being B. The upper end of the third support member 113 is pivotally connected to the bottom surface of the seat 12, with the pivot axis being P. The third support member 113 is positioned between the two second support members 112. In this embodiment, the first support member 111 and the third support member 113 have relatively large dimensions along the width direction of the folding vehicle 100, making the first support member 111 and the third support member 113 have a plate-like structure, while the second support member 112 has a rod-like structure. More specifically, referring to the rear view of the folding vehicle 100 in Figure 3, the middle section of the rear projection of the two second support members 112 has a bent structure relative to the upper and lower sections, making the upper section of the second support member 112 closer to the middle position of the folding vehicle 100 or closer to the first support member 111 than the lower section. This makes the entire frame look smaller and simpler. The rear end of the front frame 2 overlaps with the front end of the rear frame 3, and the lower side of the front frame 2 is pivotally connected to the front end of the rear frame 3, with the pivot axis being K; the lower end of the first support member 111 is pivotally connected to the middle of the rear end of the front frame 2, with the pivot axis being C, and the lower ends of the two second support members 112 are respectively pivotally connected to the two sides of the rear end of the rear frame 3, with the pivot axis being D. In this embodiment, the front frame 2 has a plate-like structure, and the rear frame 3 includes two rods distributed on the left and right sides and extending rearward.

[0031] Referring again to Figures 4 and 7, the pivot P of the upper end of the third support member 113, which is pivotally connected to the seat 12, is located at the midpoint of the seat 12 or between the center of the seat 12 and the rear end of the seat 12. This allows the third support member 113 to be positioned closer to the rear end of the seat 12. Therefore, when the user observes from a normal angle (i.e., when the user is standing in front, to the left, and to the right), the front end of the seat 12 can cover the third support member 113 below it, making the entire frame structure look simpler, more aesthetically pleasing, and visually better. The bottom surface of the seat 12 is provided with a receiving groove 121, and the third support member 113 is received in the receiving groove 121 when the folding frame 100 is folded. By providing the receiving groove 121, the third support member 113 can be received in the receiving groove 121 when the seat folding bracket 1 is folded, thereby making the structure more compact and reducing the volume of the seat folding bracket 1 after folding.

[0032] Referring again to Figures 4 to 7, the seat folding bracket 1 also includes a backrest folding mechanism 4, which is disposed at the rear end of the seat 12 and connected to the first support member 111. The first support member 111 drives the backrest folding mechanism 4 to open or fold relative to the seat 12. Specifically, the backrest folding mechanism 4 includes a backrest 41 and a connecting rod 42. The lower ends of the backrest 41 are pivotally connected to the rear ends of the seat 12 on both sides via pivot seats, with the pivot axis being G. A receiving frame 122 is provided in the middle of the rear end of the seat 12. The upper end of the first support member 111 bends towards the bottom surface of the seat 12 with the pivot axis A as the bending point and extends outward along the upper front to form a pivot part 111a. One end of the connecting rod 42 is pivotally connected to the pivot part 111a, with the pivot axis being E. The other end of the connecting rod 42 is pivotally connected to the middle of the lower end of the backrest 41, with the pivot axis being F. The pivot part 111a and the connecting rod 42 are housed within the receiving frame 122. By providing a pivot portion 111a at the upper end of the first support member 111 and connecting the pivot portion 111a to the backrest 41 using the connecting rod 42, the distance from pivot shaft E to pivot shaft O is greater than the distance from pivot shaft A to pivot shaft O. This allows the connecting rod 42 to push the lower end of the backrest 41 to rotate under the influence of the pivot portion 111a, causing the backrest 41 to move closer to the seat 12. Therefore, the backrest 41 only requires one rod to achieve linkage with the support frame 11, simplifying its structure. Furthermore, by providing a receiving frame 122 at the middle of the rear end of the seat 12, the pivot portion 111a and the connecting rod 42 are hidden at the bottom of the rear end of the seat 12, resulting in a simpler and more aesthetically pleasing overall structure with a better visual effect.

[0033] As shown in Figures 6 and 7, the bottom surface of the chair seat 12 is provided with two parallel connecting beams 123 extending in the front and rear directions. The rear section of the connecting beam 123 extends downward to form a first pivot lug 123a, which has a triangular structure. A receiving frame 122 is formed between the two first pivot lugs 123a. The first support member 111 extends into the receiving frame 122 and is pivotally connected to the two first pivot lugs 123a via a pivot shaft A. The pivot position is located at [position missing]. By setting the connecting beams 123, the load-bearing strength of the chair seat 12 can be improved, and the lower corner of the triangular structure can be [position missing]. This design allows the rear end of the chair seat 12 to form the receiving frame 122, thereby storing some of the rods inside and avoiding direct exposure, thus improving the visual effect.

[0034] As shown in Figures 6 and 7, the rear ends of the two connecting beams 123 extend upward to form second pivot lugs 123b that are pivotally connected to the backrest 41. Pivot seats 411 extend from both sides of the lower end of the backrest 41 and are pivotally connected to the second pivot lugs 123b. This increases the space of the accommodating frame 122 at the lower middle of the backrest 41 and the rear middle of the seat 12, thereby concealing the upper section of the connecting rod 42 located between the two second pivot lugs 123b, preventing the connecting rod 42 from being exposed in the side direction, and further improving the visual effect.

[0035] Please refer to Figures 2 and 4. The folding bicycle 100 also includes a front wheel seat 5, a front wheel 6, and a rear wheel 7. The front wheel 6 is respectively disposed on both sides of the front wheel seat 5, and the front wheel seat 5 is disposed at the front end of the front frame 2. The rear wheel 7 is respectively pivotally connected to the rear end of the rear frame 3 or the lower end of the second support member 112. The folding bicycle 100 frame also includes a pull rod 8. One end of the pull rod 8 is pivotally connected to the front wheel seat 5, and the other end is pivotally connected to the rear frame 3. The pivot shaft H is located behind the pivot shaft K. The pull rod 8 allows the front wheel seat 5 to be pulled when the folding bicycle 100 is folded. This allows the front wheel seat 5 to move closer to the rear frame 3 and also allows the direction rod 51 on the front wheel seat 5 to return to the center position, making the frame structure more compact and reasonable after folding, and reducing the volume after folding.

[0036] Based on the above and in conjunction with Figures 8 and 9, the folding process of the folding vehicle 100 of this application will be described in detail below:

[0037] When folding, lifting the rear end of the front frame 2 upwards causes the front end of the rear frame 3 to rise, bringing the front frame 2 and rear frame 3 closer together. Simultaneously, the rear end of the front frame 2 causes the lower end of the first support member 111 to rotate upwards around the pivot axis O, causing the upper end of the first support member 111 to rotate downwards around the pivot axis O, and the lower end of the third support member 113 to rotate forward towards the bottom surface of the seat 12. At this time, the seat 12 flips towards the rear end of the folding cart 100. Furthermore, while rotating, the upper end of the first support member 111 pushes the connecting rod 42 through the pivot part 111a, and the connecting rod 42 pushes the lower end of the backrest 41, causing the backrest 41 to move closer to the surface of the seat 12 around the pivot axis G. Finally, the folding vehicle 100 can be completely folded up after the front frame 2, rear frame 3, first support member 111, second support member 112, third support member 113, seat 12 and backrest 41 are brought together.

[0038] Compared with the prior art, this application sets up a first support member 111, two second support members 112 and a third support member 113. The two second support members 112 are symmetrically arranged on the left and right sides of the first support member 111, and the upper end of the third support member 113 is pivotally connected to the bottom surface of the seat 12 and located between the upper ends of the two second support members 112. Thus, the first support member 111, the second support member 112 and the third support member 113 can form a support frame 11 to support the seat 12. The three of them and the seat 12 form a deformable quadrilateral structure. Therefore, only four support members are needed on both sides of the seat 12 to realize the unfolding or folding of the entire seat folding bracket 1. The number of support members is less than the number of rods used in the past, the structure is simplified, and the overall appearance is more simple, stylish and beautiful.

[0039] The above-disclosed examples are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Therefore, any equivalent variations made in accordance with the scope of this application shall still fall within the scope of this application.

Claims

1. A seat folding bracket, characterized by: The seat folding support comprises a support frame and a seat, the support frame comprises a first support, two second supports and a third support, the upper end of the first support is pivotally connected to the middle of the rear end of the seat, the two second supports are symmetrically arranged on the left and right sides of the first support, and the two second supports are cross-arranged with the first support and pivotally connected to each other in the middle, the upper ends of the two second supports are respectively pivotally connected to the lower ends of the third support, and the upper end of the third support is pivotally connected to the bottom surface of the seat.

2. The seat folding bracket according to claim 1, wherein: The pivot shaft of the upper end of the third support is located at the midpoint of the seat or between the center of the seat and the rear end of the seat.

3. The seat folding bracket according to claim 1, wherein: The bottom surface of the seat is provided with a receiving groove, and the third support is accommodated in the receiving groove when the folding frame is folded.

4. The seat folding bracket according to claim 1, wherein: The seat folding support further comprises a backrest folding mechanism arranged at the rear end of the seat and connected to the first support, and the first support drives the backrest folding mechanism to open or fold relative to the seat.

5. The seat folding bracket according to claim 4, wherein: The backrest folding mechanism comprises a backrest and a connecting rod, the lower ends of the backrest are respectively pivotally connected to the two sides of the rear end of the seat, a receiving frame is arranged in the middle of the rear end of the seat, the upper end of the first support is bent and extended to a pivot part towards the bottom surface of the seat and forward, one end of the connecting rod is pivotally connected to the pivot part, the other end of the connecting rod is pivotally connected to the middle of the lower end of the backrest, and the pivot part and the connecting rod are accommodated in the receiving frame.

6. The seat folding bracket according to claim 5, wherein: The bottom surface of the seat is provided with two connecting beams extending in the front-rear direction and parallel to each other, the rear sections of the connecting beams are downwardly and outwardly extended to form first pivot ears, the receiving frame is formed between the two first pivot ears, and the first support is inserted into the receiving frame and pivotally connected to the two first pivot ears.

7. The seat folding bracket according to claim 6, wherein: The rear ends of the two connecting beams are upwardly extended to form second pivot ears pivotally connected to the backrest.

8. The seat folding bracket according to claim 1, wherein: The side projection of the second support is in a bent structure, the lower section of the second support is inclined and extended from the lower end to the upper front end, and the upper section of the second support is bent and extended from the lower section to the rear end in a direction deviating from the extension direction of the lower section.

9. The seat folding bracket according to claim 8, wherein: The side projection of the first support is in a bent structure, the lower section of the first support is inclined and extended from the lower end to the upper rear end, and the upper section of the first support is bent and extended from the lower section to the rear end in a direction deviating from the extension direction of the lower section.

10. The seat folding bracket according to claim 1, wherein: The middle section of the rear side projection of the second support is in a bent structure relative to the upper section and the lower section, so that the upper section of the second support is closer to the middle position of the folding vehicle or closer to the first support than the lower section.

11. A folding vehicle characterized by: The seat folding support comprises a support frame and a seat, the support frame comprises a first support, two second supports and a third support, the upper end of the first support is pivotally connected to the middle of the rear end of the seat, the two second supports are symmetrically arranged on the left and right sides of the first support, and the two second supports are cross-arranged with the first support and pivotally connected to each other in the middle, the upper ends of the two second supports are respectively pivotally connected to the lower ends of the third support, and the upper end of the third support is pivotally connected to the bottom surface of the seat.

12. The foldable vehicle of claim 11, wherein: The folding bicycle further comprises front wheel seats, front wheels and rear wheels, the front wheels are respectively arranged at two sides of the front wheel seats, and the front wheel seats are arranged at front ends of the front frames; the rear wheels are respectively pivotally connected to rear ends of the rear frames or lower ends of the second support members.

13. The foldable vehicle of claim 12, wherein: The folding bicycle frame further comprises a pull rod, one end of the pull rod is pivotally connected to the front wheel seat, and the other end of the pull rod is pivotally connected to the rear frame.

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