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, a seat and a backrest folding mechanism, the seat is arranged on the support frame, and the backrest folding mechanism is arranged at the rear end of the seat; the backrest folding mechanism comprises a backrest and a connecting rod, the lower end of the backrest is pivoted to the rear end of the chair seat, the supporting frame is provided with a first supporting piece, the upper end of the first supporting piece is pivoted to the rear end of the chair seat, and the upper end of the first supporting piece faces the bottom surface of the chair seat and bends and extends out of a pivoting part along the upper front direction; one end of the connecting rod is pivoted to the pivoting part, and the other end of the connecting rod is pivoted to the lower end of the backrest; and the support frame drives the chair seat and the backrest folding mechanism to be unfolded or folded. The seat folding support and the folding bicycle have the advantages of being 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, uses the support frame to connect the seat and the vehicle frame, and, a backrest is set at the rear end of the seat, and a linkage mechanism is arranged between the backrest and the support frame to realize the purpose of the linkage folding of the backrest and the support frame. However, since the linkage mechanism between the backrest and the support frame of the existing seat folding bracket is generally linked by one or more rods, these rods are arranged on the left and right sides of the backrest, and these rods will be completely exposed. Therefore, this makes the number of rods of the entire folding bicycle relatively large, the number of connection points seems to be relatively large, and the connection structure becomes complex, seriously affecting the aesthetics of the whole vehicle. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a seat folding bracket with 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] To achieve the above purposes, the seat folding bracket provided by the utility model includes a support frame, a seat and a backrest folding mechanism. The seat is arranged on the support frame, and the backrest folding mechanism is arranged at the rear end of the seat; the backrest folding mechanism includes a backrest and a connecting rod. The lower end of the backrest is pivotally connected to the rear end of the seat. The support frame has a first support member, the upper end of the first support member is pivotally connected to the rear end of the seat and the upper end of the first support member faces the bottom surface of the seat and bends and extends forward 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 lower end of the backrest; the support frame drives the seat and the backrest folding mechanism to open or fold.

[0006] Compared with the prior art, the utility model bends and extends the upper end of the first support member forward upward towards the seat to form a pivot portion, and uses the connecting rod to connect the pivot portion and the backrest, so that the connecting rod is driven by the pivot portion to push the lower end of the backrest to rotate with a thrust, so that the backrest approaches the seat. Therefore, only one rod is needed for the backrest to realize linkage with the support frame, and the structure is very simple. And, since the pivot portion bends and extends to the bottom surface of the rear end of the seat, the seat can block the pivot portion and the connecting rod, making the overall structure look more concise and beautiful, and the visual effect is better.

[0007] Preferably, a receiving frame is formed at the rear end of the seat, and the pivoting portion and the connecting rod are received in the receiving frame. By forming the receiving frame at the rear end of the seat, the pivoting portion and the connecting rod are received at the bottom of the rear end of the seat by using the receiving frame, so that the sides of the pivoting portion and the connecting rod are shielded, and thus they can be hidden at the bottom of the rear end of the seat, making the overall structure look more concise and beautiful with better visual effects.

[0008] Specifically, both sides of the lower end of the backrest are pivotally connected to both sides of the rear end of the seat, and the other end of the connecting rod is pivotally connected to the middle of the lower end of the backrest.

[0009] 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.

[0010] Specifically, the rear ends of the two connecting beams extend upward to form second pivoting ears pivotally connected to the backrest. In this way, the connecting rod located between the two second pivoting ears can be shielded to prevent the connecting rod from being exposed from the side direction, further enhancing the visual effect.

[0011] Preferably, the support frame includes the first support member, the second support member and the third support member; the second support member and the first support member are arranged in a cross shape and pivotally connected to each other in the middle; the upper end of the second support member is 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 front end of the seat. By providing the first support member, the second support member and the third support member, a deformable quadrilateral structure is formed by the first support member, the second support member, the third support member and the seat, so as to achieve the purpose of synchronously driving the seat to fold when the support frame folds.

[0012] A folding vehicle includes a front frame, a rear frame and a seat folding bracket. The rear end of the front frame is overlapped 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 rear end of the front frame, and the lower end of the second support member is pivotally connected to the rear end of the rear frame.

[0013] Preferably, the folding bicycle further includes a front wheel seat, a front wheel and a rear wheel. The front wheels are 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 wheels are respectively pivotally connected to the rear end of the rear frame or the lower end of the second support member.

[0014] Specifically, 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. Description of the Drawings

[0015] Figure 1 is a perspective view of the folding bicycle of the present invention when it is fully unfolded.

[0016] Figure 2 is a side view of the folding bicycle of the present invention when it is fully unfolded.

[0017] Figure 3 is a rear view of the folding bicycle of the present invention.

[0018] Figure 4 is a cross-sectional view of the folding bicycle of the present invention.

[0019] Figure 5 is an exploded view of the seat folding bracket of the folding bicycle of the present invention.

[0020] Figure 6 is a structural diagram of the surface of the seat of the folding bicycle of the present invention.

[0021] Figure 7 is a structural diagram of the bottom surface of the seat of the folding bicycle of the present invention.

[0022] Figure 8 is a state diagram of the folding bicycle of the present invention when it is semi-folded.

[0023] Figure 9 is a state diagram of the folding bicycle of the present invention after it is fully folded. Detailed Description of the Invention

[0024] In order to describe in detail the technical content, structural features, and achieved effects of the present invention, the following is described in detail in conjunction with the embodiments and with reference to the accompanying drawings.

[0025] As Figures 1 to 5As shown, 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, and the support frame 11 drives the seat 12 to open or fold. 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 their middles 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 segment, and the part above the demarcation point is the upper segment; the lower segment of the first support member 111 extends obliquely upward from bottom to back, and the upper segment of the first support member 111 bends and extends backward along the extension direction deviating from the lower segment; the lower segment of the second support member 112 extends obliquely upward from bottom to front, and the upper segment of the second support member 112 bends and extends backward along the extension direction deviating from the lower segment. 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 dimensions of the first support member 111 and the third support member 113 in the width direction of the folding bicycle 100 are larger, 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 3Rear view of the folding bicycle 100. The middle section of the rear projection of the two second support members 112 is bent relative to the upper and lower sections, such 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 entire frame look more compact and simple. The rear end of the front frame 2 is arranged overlapping 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 both 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 backward. The support frame 11 can also be in other existing structural forms, which will not be listed one by one here.

[0026] Please refer again to Figure 4 and Figure 7 As shown, the pivot axis P of the upper end of the third support member 113 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 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., 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, with a better visual effect. 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, thereby making the structure more compact and reducing the volume of the seat folding bracket 1 after folding.

[0027] Please refer again to Figures 4 to 7As shown, the seat folding bracket 1 further includes a backrest folding mechanism 4, and the support frame 11 opens or folds the backrest folding mechanism 4. The backrest folding mechanism 4 is disposed at the rear end of the seat 12 and is connected to the first support member 111, and 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 coaxially pivotally connected to the two sides of the rear end of the seat 12 through pivot seats respectively, and the pivot axis is G. A receiving frame 122 is formed in the middle of the rear end of the seat 12. The upper end of the first support member 111 extends toward the bottom surface of the seat 12 with the pivot axis A as a bending point and extends obliquely forward to form 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 to 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 drives the lower end of the backrest 41 to rotate with a thrust under the drive of the pivot portion 111a, and the backrest 41 moves closer to the seat 12. Therefore, only one rod is needed for the backrest 41 to be linked with the support frame 11, which simplifies the structure of the backrest 41. Moreover, by forming the 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.

[0028] Again, 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 protrudes downward to form a first pivot ear 123a, and the first pivot ear 123a has a triangular structure. The receiving frame 122 is formed between the two first pivot ears 123a. The first support member 111 extends into the receiving frame 122 and is pivotally connected to the two first pivot ears 123a through the pivot axis A, and the pivotal connection position is located at the should. 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 receiving frame 122, so that some rods can be received inside to avoid direct exposure, thereby improving the visual effect.

[0029] Again, Figure 6 andFigure 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 in the middle of the lower end of the backrest 41 and the middle of the rear side of the seat 12, so as to shield the upper section of the connecting rod 42 located between the two second pivot ears 123b, prevent the connecting rod 42 from being exposed in the side direction, and further improve the visual effect.

[0030] 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 further 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, and a pivot shaft H. 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.

[0031] Combined with the above and Figure 8 and Figure 9 , the folding process of the folding vehicle 100 of the present invention will be described in detail as follows:

[0032] When folding, lift the rear end of the front frame 2 upward to drive 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 shaft O, so that the upper end of the first support member 111 rotates downward around the pivot shaft O, and the lower end of the third support member 113 rotates forward and approaches the bottom surface of the seat 12. At this time, the seat 12 flips towards the rear end of the folding vehicle 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, so that the backrest 41 approaches the surface of the seat 12 around the pivot shaft 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 vehicle 100 can be completely folded.

[0033] Compared with the prior art, in the present utility model, by providing 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, so that 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, and the number of support members is less than that of the traditional rods, and the structure is simplified. Moreover, since the pivot portion 111a is bent and extended to the bottom surface of the rear end of the seat 12, the pivot portion 111a and the connecting rod 42 can be shielded, making the overall structure look more simple, fashionable and beautiful.

[0034] The above-disclosed are only the preferred examples of the present utility model, and of course, the scope of 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, a seat and a backrest folding mechanism, the seat is arranged on the support frame, and the backrest folding mechanism is arranged at the rear end of the seat; the backrest folding mechanism includes a backrest and a connecting rod, the lower end of the backrest is pivotally connected to the rear end of the seat, the support frame has a first support member, the upper end of the first support member is pivotally connected to the rear end of the seat and the upper end of the first support member is toward the bottom surface of the seat and extends along the upper front 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 lower end of the backrest; the support frame drives the seat and the backrest folding mechanism to open or fold.

2. The seat folding bracket according to claim 1, characterized in that: A containing frame is provided at the rear end of the seat, and the pivoting portion and the connecting rod are contained in the containing frame.

3. The seat folding bracket according to claim 2, characterized in that: 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, and the other end of the connecting rod is pivotally connected to the middle part of the lower end of the backrest.

4. The seat folding bracket according to claim 2, characterized in that: The bottom surface of the seat is provided with two connecting beams extending in the front and rear directions and parallel to each other, the rear section of the connecting beam protrudes and extends downward to form a first pivot ear, the accommodating frame is formed between the two first pivot ears, the first support member extends into the accommodating frame and is pivotally connected with the two first pivot ears.

5. The seat folding bracket according to claim 4, characterized in that: The rear ends of the two connecting beams extend upward to form a second pivoting ear pivotally connected to the backrest.

6. The seat folding bracket according to any one of claims 1 to 5, characterized in that: The support frame includes the first support member, the second support member and the third support member; the second support member and the first support member are cross-arranged and the middle parts of the two are pivotally connected to each other; the upper end of the second support member is 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 front end of the seat.

7. A folding bicycle, characterized in that: It comprises a front frame, a rear frame and the seat folding bracket as claimed in claim 6, wherein the rear end of the front frame is arranged to overlap with the front end of the rear frame, and the lower side of the front frame and the front end of the rear frame are pivotally connected to each other; the lower end of the first support member is pivotally connected to the rear end of the front frame, and the lower end of the second support member is pivotally connected to the rear end of the rear frame.

8. The folding bicycle according to claim 7, characterized in that: The folding bicycle further comprises a front wheel seat, a front wheel and a rear wheel. The front wheel is 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 wheel is respectively pivotally connected to the rear end of the rear frame or the lower end of the second support member.

9. The folding bicycle according to claim 8, characterized in that: 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.

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