Seat folding support and folding bicycle

Abstract

The utility model discloses a seat folding support and a folding vehicle, the seat folding support comprises a support frame and a seat, the support frame comprises a first support piece, two second support pieces and a third support piece, the upper end of the first support piece is pivoted with the middle part of the rear end of the seat; the two second supporting pieces are symmetrically arranged on the left side and the right side of the first supporting piece respectively, the two second supporting pieces and the first supporting piece are arranged in a crossed mode respectively, and the middle portions of the two second supporting pieces and the middle portions of the first supporting piece are connected in a pivoted mode. The upper ends of the two second supporting pieces are pivoted to the two sides of the lower end of the third supporting piece respectively. And the upper end of the third supporting piece is pivoted to the bottom surface of the chair seat. The seat folding bracket disclosed by the utility model is few in used rod pieces, simple in structure, fashionable and attractive.

Description

Technical Field

[0001] The utility model relates to a folding bicycle, in particular to a seat folding bracket and a folding bicycle with a simple structure, fashionable and beautiful appearance. Background Art

[0002] The existing seat folding bracket structure generally sets a support frame under the seat side, and uses the support frame to connect the seat and the vehicle frame. The support frames are symmetrically arranged on both sides of the seat; specifically, a cross-shaped support frame is arranged on each side of the seat, and a variable quadrilateral structure is formed between the support frame and the seat. In this way, when the bottom frame of the vehicle is folded, through the deformation of the quadrilateral structure, the seat and the support frame can be folded following the folding of the bottom frame of the vehicle. However, since the number of rods of the support frame on one side of the existing seat folding bracket is at least three, the total number of rods on both sides is at least six. The number of rods of the folding bicycle is relatively large, which makes the whole folding bicycle look like it has a large number of connection points, and the connection structure is complex, and the exposed rods are complicated, seriously affecting the aesthetics of the whole vehicle. Content of the Utility Model

[0003] The purpose of the utility model is to provide a seat folding bracket with a small number of rods, a simple structure, fashionable and beautiful appearance.

[0004] Another purpose of the utility model is to provide a folding bicycle with a simple structure, fashionable and beautiful appearance.

[0005] In order to achieve the above purpose, the seat folding bracket provided by the utility model comprises a support frame and a seat. The support frame comprises 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 respectively, and the two second support members are respectively arranged in a cross shape with the first support member and their middles are pivotally connected to each other; the upper ends of the two second support members are respectively pivotally connected to both sides of the lower end of the third support member; the upper end of the third support member is pivotally connected to the bottom surface of the seat.

[0006] Compared with the prior art, the utility model forms a support frame for supporting the seat by arranging 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 respectively, and the upper end of the third support member is pivotally connected to the bottom surface of the seat and located between the upper ends of the two second support members. Therefore, the first support member, the second support member and the third support member can form a support frame for the seat, and the three of them and the seat form a deformable quadrilateral structure. Therefore, only four support members are needed in total on both sides of the seat to realize the unfolding or folding of the entire seat folding bracket. The number of support members is less than that of the traditional rods, the structure is simplified, and the overall look is more simple, fashionable and beautiful.

[0007] Preferably, the pivot axis of the upper end of the third support member 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 can make the position of the third support member closer to the rear end of the seat. Therefore, when the user observes at a normal angle, the front end of the seat can completely cover the third support member on the lower side, so that the overall structure can be more concise and beautiful and the visual effect is better.

[0008] Preferably, a receiving groove is provided on the bottom surface of the seat, 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, so that the structure is more compact and the volume of the seat folding bracket after folding can be reduced.

[0009] Preferably, the seat folding bracket further includes a backrest folding mechanism, the backrest folding mechanism is arranged 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.

[0010] Specifically, the backrest folding mechanism includes a backrest and a connecting rod. The two sides of the lower end of the backrest are respectively pivotally connected to the two sides of the rear end of the seat. A receiving frame is formed in the middle of the rear end of the seat. The upper end of the first support member faces the bottom surface of the seat and extends forward and upward to form a pivoting portion. One end of the connecting rod is pivotally connected to the pivoting portion, and the other end of the connecting rod is pivotally connected to the middle of the lower end of the backrest. The pivoting portion and the connecting rod are received in the receiving frame. By providing the pivoting portion at the upper end of the first support member and connecting the pivoting portion to the backrest using the connecting rod, the backrest can be linked to the support frame with only one rod, simplifying the structure of the backrest. Moreover, by forming the receiving frame in the middle of the rear end of the seat and hiding the pivoting portion and the connecting rod in the bottom of the rear end of the seat using the receiving frame, the overall structure can look more concise and beautiful, with a better visual effect.

[0011] Specifically, two connecting beams extending in the front-rear direction and parallel to each other are provided on the bottom surface of the seat. The rear section of the connecting beam protrudes downward to form a first pivoting ear. The receiving frame is formed between the two first pivoting ears. The first support member extends into the receiving frame and is pivotally connected to the two first pivoting ears. By providing the connecting beam, on the one hand, the load-bearing strength of the seat can be improved, and on the other hand, the receiving frame can be formed at the rear end of the seat, so that some rods can be received inside to avoid direct exposure, thereby enhancing the visual effect.

[0012] Specifically, the rear ends of the two connecting beams extend upward to form second pivoting ears pivotally connected to the backrest. This can block the connecting rod located between the two second pivoting ears to prevent the connecting rod from being exposed from the side direction, further enhancing the visual effect.

[0013] Specifically, the side projection of the second support member is in a bent structure; the lower section of the first support member extends obliquely upward from the bottom to the rear, and the upper section of the first support member extends and bends backward along a direction deviating from the extension direction of the lower section.

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

[0015] Specifically, the middle section of the rear projection of the second support member is bent relative to the upper and lower sections, such that the upper section of the second support member is closer to the middle position of the folding cart or closer to the first support member than the lower section.

[0016] A folding bike, comprising a front frame, a rear frame and a seat folding bracket. The rear end of the front frame is arranged overlapping 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 the first support member is pivotally connected to the middle of the rear end of the front frame, and the lower ends of the two second support members are respectively pivotally connected to both sides of the rear end of the rear frame.

[0017] Preferably, the folding bike further comprises a front wheel seat, a front wheel and a rear wheel. The front wheels are respectively arranged on both sides of the front wheel seat, and the front wheel seat is arranged at the front end of the front frame; the rear wheels are respectively pivotally connected to the rear end of the rear frame or the lower ends of the second support members.

[0018] Specifically, the folding frame further comprises a pull rod, one end of the pull rod is pivotally connected to the front wheel seat, and the other end is pivotally connected to the rear frame. Description of the Drawings

[0019] Figure 1 is a perspective view of the folding bike of the present utility model when it is fully unfolded.

[0020] Figure 2 is a side view of the folding bike of the present utility model when it is fully unfolded. ?

[0021] Figure 3 is a rear view of the folding bike of the present utility model.

[0022] Figure 4 is a sectional view of the folding bike of the present utility model.

[0023] Figure 5 is an exploded view of the seat folding bracket of the folding bike of the present utility model.

[0024] Figure 6 is a structural diagram of the surface of the seat of the folding bike of the present utility model.

[0025] Figure 7 is a structural diagram of the bottom surface of the seat of the folding bike of the present utility model.

[0026] Figure 8 is a state diagram of the folding bike of the present utility model when it is semi-folded.

[0027] Figure 9 is a state diagram of the folding bike of the present utility model after it is fully folded. Detailed Embodiments

[0028] To describe in detail the technical content, structural features and achieved effects of the present utility model, the following is described in detail in conjunction with the embodiments and with reference to the drawings.

[0029] As Figures 1 to 5 It should be noted that there seems to be a "?" in the translation of line . Please check the original text for accuracy.As shown in the figure, the folding bicycle 100 of the present utility model 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, and the pivot axis is A; the two second support members 112 are symmetrically arranged on the left and right sides of the first support member 111 respectively, that is, the first support member 111 is located between the two second support members 112. The two second support members 112 are respectively arranged in a cross shape with the first support member 111 and the middle parts of the two are pivotally connected to each other, and the pivot axis is O. More specifically, please refer to Figure 2 the side view of the folding bicycle 100 in Figure 2 . The side projections of the first support member 111 and the second support member 112 are both bent structures; taking the pivot point where the first support member 111 and the second support member 112 are pivotally connected as the demarcation point, the part below the demarcation point is the lower section, and the part above the demarcation point is the upper section; the lower section of the first support member 111 extends obliquely upward from bottom to back, and the upper section of the first support member 111 bends and extends backward along the extension direction deviating from the lower section; the lower section of the second support member 112 extends obliquely upward from bottom to front, and the upper section of the second support member 112 bends and extends backward along the extension direction deviating from the lower section. The upper ends of the two second support members 112 are respectively pivotally connected to both sides of the lower end of the third support member 113, and the pivot axis is B; the upper end of the third support member 113 is pivotally connected to the bottom surface of the seat 12, and the pivot axis is P; the third support member 113 is located between the two second support members 112. In this embodiment, the first support member 111 and the third support member 113 have larger dimensions in the width direction of the folding bicycle 100, so that the first support member 111 and the third support member 113 are in a plate-like structure, while the second support member 112 is in a rod-like structure. More specifically, please refer to Figure 3 the rear view of the folding bicycle 100 in Figure 3 . The middle section of the rear projections of the two second support members 112 is bent relative to the upper and lower sections, so that the upper section of the second support member 112 is closer to the middle position of the folding bicycle 100 or closer to the first support member 111 than the lower section. This makes the whole frame look more compact and simple. The rear end of the front frame 2 is overlapped 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, and the pivot axis is 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, and the pivot axis is C, and the lower ends of the two second support members 112 are respectively pivotally connected to both sides of the rear end of the rear frame 3, and the pivot axis is D. In this embodiment, the front frame 2 is in a plate-like structure, and the rear frame 3 includes two rods distributed on the left and right sides and extending backward.

[0030] Please refer to again Figure 4and Figure 7 As shown, the upper end of the third support member 113 is pivotally connected to the pivot axis P of the seat 12, and the pivot axis P 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 can make the position of the third support member 113 closer to the rear end of the seat 12. Therefore, when the user observes at a normal angle (i.e., when the user stands in the front, left, and right positions), the front end of the seat 12 can block the third support member 113 below it, so that the structure of the entire frame can look more concise and beautiful, and the visual effect is better. A receiving groove 121 is provided on the bottom surface of the seat 12, and the third support member 113 is received in the receiving groove 121 when the folding bicycle 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, so that the structure is more compact, and the volume of the seat folding bracket 1 after folding can be reduced.

[0031] Please refer to again Figures 4 to 7 As shown, the seat folding bracket 1 further includes a backrest folding mechanism 4. The backrest folding mechanism 4 is provided at the rear end of the seat 12 and is 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 two sides of the lower end of the backrest 41 are respectively coaxially pivotally connected to the two sides of the rear end of the seat 12 through pivot seats, and the pivot axis is 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 extends forward and upward from the pivot axis A toward the bottom surface of the seat 12 to extend a pivot portion 111a. One end of the connecting rod 42 is pivotally connected to the pivot portion 111a, and the pivot axis is E. The other end of the connecting rod 42 is pivotally connected to the middle of the lower end of the backrest 41, and the pivot axis is F. The pivot portion 111a and the connecting rod 42 are received in the receiving frame 122. By providing the pivot portion 111a at the upper end of the first support member 111 and connecting the pivot portion 111a and the backrest 41 by using the connecting rod 42, the distance from the pivot axis E to the pivot axis O is greater than the distance from the pivot axis A to the pivot axis O, so that the connecting rod 42 is driven by the pivot portion 111a to push the lower end of the backrest 41 to rotate with a thrust, so that the backrest 41 moves closer to the seat 12. Therefore, only one rod is needed for the backrest 41 to realize linkage with the support frame 11, which simplifies the structure of the backrest 41. And, by providing a receiving frame 122 in the middle of the rear end of the seat 12 and hiding the pivot portion 111a and the connecting rod 42 at the bottom of the rear end of the seat 12 by using the receiving frame 122, the overall structure can look more concise and beautiful, and the visual effect is better.

[0032] For another example Figure 6 and Figure 7 As shown, two connecting beams 123 extending in the front-rear direction and parallel to each other are provided on the bottom surface of the seat 12. The rear section of the connecting beam 123 extends downward and protrudes to form a first pivot ear 123a, and the first pivot ear 123a has a triangular structure. An accommodation frame 122 is formed between the two first pivot ears 123a. The first support member 111 extends into the accommodation frame 122 and is pivotally connected to the two first pivot ears 123a through a pivot shaft A, and the pivoting position is located at the supposed position. By providing the connecting beam 123, on the one hand, the load-bearing strength of the seat 12 can be improved, and on the other hand, the corner at the lower end of the triangular structure can be made. Such a design can enable the rear end of the seat 12 to form the accommodation frame 122, so that some rods can be received inside, avoiding direct exposure, thereby enhancing the visual effect.

[0033] For another example Figure 6 and Figure 7 As shown, the rear ends of the two connecting beams 123 extend upward to form second pivot ears 123b pivotally connected to the backrest 41, and pivot seats 411 extending from both sides of the lower end of the backrest 41 are pivotally connected to the second pivot ears 123b. In this way, the space of the accommodation frame 122 can be increased at the middle of the lower end of the backrest 41 and the middle of the rear side of the seat 12, so as to block the upper section of the connecting rod 42 between the two second pivot ears 123b, preventing the connecting rod 42 from being exposed in the side direction, and further enhancing the visual effect.

[0034] Please refer to Figure 2 and Figure 4 As shown, the folding vehicle 100 further includes a front wheel seat 5, front wheels 6 and rear wheels 7. The front wheels 6 are respectively arranged on both sides of the front wheel seat 5, and the front wheel seat 5 is arranged at the front end of the front frame 2; the rear wheels 7 are respectively pivotally connected to the rear end of the rear frame 3 or the lower end of the second support member 112. The folding vehicle 100 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, with a pivot shaft H, and the pivot shaft H is located behind the pivot shaft K. By providing the pull rod 8, when the folding vehicle 100 is folded, the front wheel seat 5 can be pulled, which can not only make the front wheel seat 5 close to the rear frame 3, but also make the steering rod 51 on the front wheel seat 5 return to the correct position, making the folded frame structure more compact and reasonable, and the folded volume smaller.

[0035] Combining the above and in conjunction with Figure 8 and Figure 9 , the folding process of the folding vehicle 100 of the present invention will be described in detail as follows:

[0036] When folding, lift the rear end of the front frame 2 upward, driving the front end of the rear frame 3 to rise, and the front frame 2 and the rear frame 3 will approach each other. At the same time, the rear end of the front frame 2 drives the lower end of the first support member 111 to rotate upward around the pivot axis O, causing the upper end of the first support member 111 to rotate downward around the pivot axis O, and the lower end of the third support member 113 to rotate forward and approach the bottom surface of the seat 12. At this time, the seat 12 flips towards the rear end of the folding bicycle 100. In addition, while rotating, the upper end of the first support member 111 pushes the connecting rod 42 through the pivot portion 111a, and the connecting rod 42 pushes the lower end of the backrest 41, causing the backrest 41 to approach the surface of the seat 12 around the pivot axis G. Finally, after the front frame 2, the rear frame 3, the first support member 111, the second support member 112, the third support member 113, the seat 12 and the backrest 41 approach each other, the folding bicycle 100 can be completely folded.

[0037] Compared with the prior art, the present utility model is provided with 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 respectively, 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 members 112 and the third support member 113 can form a support frame 11 for supporting the seat 12, and the three of them and the seat 12 form a deformable quadrilateral structure. Therefore, only four support members are needed in total on both sides of the seat 12 to realize the deployment or folding of the entire seat folding bracket 1. The number of support members is less than that of the traditional rods, the structure is simplified, and the overall appearance looks more simple, fashionable and beautiful.

[0038] The above-disclosed are only the preferred examples of the present utility model, and of course, the scope of the rights of the present utility model cannot be limited thereby. Therefore, the equivalent changes made according to the scope of the patent application of the present utility model still fall within the scope covered by the present utility model.

Claims

1. A seat folding bracket, characterized in that: It 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 respectively, and the two second support members are cross - arranged with the first support member and their middles are pivotally connected to each other. The upper ends of the two second support members are respectively pivotally connected to both sides of the lower end of the third support member. The upper end of the third support member is pivotally connected to the bottom surface of the seat.

2. The seat folding bracket according to claim 1, wherein: The pivot axis where the upper end of the third support member is pivotally connected to the seat is located at the mid - point 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: A receiving groove is provided on the bottom surface of the seat, and the third support member is received in the receiving groove when the folding frame is folded.

4. The seat folding bracket according to claim 1, wherein: The seat folding bracket further includes a backrest folding mechanism. The backrest folding mechanism is arranged at the rear end of the seat and is connected to the first support member, and the first support member 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 includes a backrest and a connecting rod. Both sides of the lower end of the backrest are respectively pivotally connected to both sides of the rear end of the seat. A receiving frame is provided in the middle of the rear end of the seat. The upper end of the first support member faces the bottom surface of the seat and extends forward and upward 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 received in the receiving frame.

6. The seat folding bracket according to claim 5, characterized in that: Two connecting beams extending in the front - rear direction and parallel to each other are provided on the bottom surface of the seat. The rear section of the connecting beam protrudes downward to form a first pivot ear. The receiving frame is formed between the two first pivot ears. The first support member extends into the receiving frame and is 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 extend upward to form second pivot ears for pivotally connecting with the backrest.

8. The seat folding bracket according to claim 1, characterized in that: The side projection of the second support member is a bent structure. The lower section of the second support member extends obliquely from bottom to front and upward, and the upper section of the second support member bends and extends backward along a direction deviating from the extension direction of the lower section.

9. The seat folding bracket according to claim 8, characterized in that: The side projection of the first support member is a bent structure. The lower section of the first support member extends obliquely from bottom to rear and upward, and the upper section of the first support member bends and extends backward along 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 projection of the second support member is bent relative to the upper and lower sections, such 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.

11. A folding bicycle, characterized in that: It includes a front frame, a rear frame and the seat folding bracket according to any one of claims 1 to 10. The rear end of the front frame is arranged overlapping 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 the first support member is pivotally connected to the middle of the rear end of the front frame, and the lower ends of the two second support members are respectively pivotally connected to both sides of the rear end of the rear frame.

12. The folding bicycle according to claim 11, wherein: The folding bicycle further includes a front wheel seat, a front wheel and a rear wheel. The front wheels are respectively arranged on both sides of the front wheel seat, and the front wheel seat is arranged at the front end of the front frame; the rear wheels are respectively pivotally connected to the rear end of the rear frame or the lower end of the second support member.

13. The folding bicycle according to claim 12, characterized in that: The folding frame further includes a pull rod. One end of the pull rod is pivotally connected to the front wheel seat, and the other end is pivotally connected to the rear frame.

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