Folding seat and folding vehicle

Abstract

The application discloses a folding seat and a folding vehicle. The folding seat comprises a seat, a backrest, a traction member and a locking member. The rear end of the seat is provided with a locking portion. The backrest is pivotally connected to the seat. The locking member is movably arranged on the backrest. The traction member is arranged on the backrest. One end of the traction member is connected with the locking member and drives the locking member to extend out of or retract into the backrest, so as to extend out of the backrest and be locked with the locking portion when the backrest is unfolded relative to the seat. The backrest of the folding seat can be independently unfolded or folded. The folding seat has the advantages of simple structure and simple operation.

Description

Technical Field

[0001] This invention relates to a folding vehicle, and more particularly to a folding seat. Background Technology

[0002] Existing foldable electric bikes typically link the seat, backrest, and frame together for easy folding. When folding, simply folding the frame simultaneously folds the seat and backrest. For example, utility model patent CN204659922U, entitled "Folding Seat Backrest Linked Folding Structure," discloses a linkage rod between the frame and backrest. During folding, the frame moves the seat downwards, simultaneously driving the linkage rod, which in turn folds the backrest. While this method reduces user effort and facilitates folding and unfolding, the seat height cannot be adjusted. This is because adjusting the frame also folds the backrest, rendering the seat unusable. Therefore, these folding bikes are difficult to adapt to users of different heights. To solve the above problems, the backrest must be separated from the frame. When the seat height is adjusted via the frame, the backrest should remain open, and when the frame is fully folded, the backrest should also be fully folded. However, such a structure does not currently exist. Summary of the Invention

[0003] The purpose of this invention is to provide a folding seat whose backrest can be opened or folded independently, and which has the advantages of simple structure and easy operation.

[0004] Another objective of this invention is to provide a folding cart with adjustable seat height, simplified structure, convenient operation, and small size when folded.

[0005] To achieve the above objectives, the folding chair provided by the present invention includes a seat, a backrest, a traction member, and a locking member. The rear end of the seat is provided with a locking part, the backrest is pivotally connected to the seat, and the locking member is movably disposed on the backrest. The traction member is disposed on the backrest, one end of which is connected to the locking member and drives the locking member to extend or retract into the backrest, so that when the backrest is unfolded relative to the seat, it extends outward and engages with the locking part to lock.

[0006] Compared with existing technologies, this invention, by pivoting the backrest to the seat, allows the backrest to rotate relative to the seat. When the backrest rotates towards the seat and closes, the backrest and seat are in a folded state; when the backrest rotates away from the seat and opens, the backrest and seat are in an unfolded state. Furthermore, by movably providing a locking member on the backrest and a locking part on the seat, a traction member engages or disengages the locking member from the locking part, thereby locking or unlocking the locking member and the locking part. Therefore, the backrest and seat are mutually locked when unfolded or folded together after unlocking, resulting in a very simple structure. When applied to a folding cart, this allows for independent unfolding or folding operations without needing to be linked to the folding cart, thus eliminating many linkage structures that associate the folding seat with the folding cart, further simplifying the structure of the folding cart. In addition, during operation, only the traction member needs to be operated to drive the locking member and the locking part to release and fold, which is very convenient and quick. After folding, the backrest is close to the seat, further reducing the volume of the folding cart and improving the convenience of storage or carrying.

[0007] Preferably, the folding seat further includes an operation switch located on the rear side of the backrest, with the other end of the traction member extending to the rear side of the backrest and connected to the operation switch. The traction member allows for convenient user operation without affecting seating. The operation switch further enhances the ease of use and unlocking.

[0008] Preferably, the folding seat further includes a reset member disposed between the backrest and the locking member, providing an elastic force that causes the locking member to extend out of the backrest. By providing the reset member and utilizing its elastic force, the locking member can automatically engage with the locking part, thereby achieving automatic locking between the backrest and the seat, simplifying the operation steps and improving ease of use.

[0009] Specifically, the locking part is provided with a guide slope to guide the locking member into the backrest during the unfolding of the backrest relative to the seat, so as to avoid interference.

[0010] Preferably, the backrest includes a support arm and a back panel, the support arm is pivotally connected to the seat, the back panel is fixed to the support arm, the locking member is slidably disposed at one end of the support arm near the seat, and the traction member passes through the interior of the support arm and is connected to the locking member.

[0011] Preferably, the folding seat further includes a positioning mechanism disposed between the backrest and the seat to position the backrest. By providing this positioning mechanism, the locking member and the locking part can accurately position the backrest relative to the seat before locking, thereby improving the accuracy of the alignment of the locking member and the locking part. Furthermore, after the locking member and the locking part are released, the backrest is positioned relative to the seat, thus preventing the backrest from accidentally flipping over due to sudden release from the seat and improving safety during use.

[0012] Specifically, the positioning mechanism includes a positioning protrusion and a positioning recess. The positioning protrusion is disposed on one of the backrest and the seat, and the positioning recess is disposed on the other. When the locking member engages with the locking part, the positioning protrusion is engaged within the positioning recess. Through the cooperation of the positioning protrusion and the positioning recess, the backrest and the seat can be quickly and accurately positioned, making positioning simple and convenient.

[0013] Specifically, the positioning mechanism further includes an elastic element that provides an elastic force to cause the positioning protrusion to extend into the positioning recess. By using the elastic element to push the positioning protrusion, the positioning protrusion can automatically engage with the positioning recess, improving ease of use.

[0014] Specifically, the rear end of the seat extends into a pivot portion, the backrest is pivotally connected to the pivot portion, and the positioning recess is disposed on the pivot portion. By providing the pivot portion, it can be connected to the backrest, and the positioning mechanism can be hidden inside, thus making the folding chair more concise and aesthetically pleasing.

[0015] Preferably, the locking element is a locking pin, and the locking part is provided with a locking hole. The locking pin is inserted into the locking hole to achieve locking.

[0016] A folding bicycle includes a front frame, a rear frame, a first support rod, a second support rod, a third support rod, and a folding seat. The front frame is slidably disposed relative to the rear frame in a front-rear direction. The lower end of the first support rod is pivotally connected to the front end of the rear frame, and the upper end is pivotally connected to the lower end of the third support rod. The lower end of the second support rod is pivotally connected to the rear end of the front frame, and the upper end is pivotally connected to the front end of the seat of the folding seat. The first support rod and the second support rod are pivotally connected in a cross configuration. The upper end of the third support rod is pivotally connected to the rear end of the seat of the folding seat.

[0017] Preferably, the device also includes an electric drive unit disposed between the front and rear frames to drive the front and rear frames to slide relative to each other. By using the electric drive unit to move the front and rear frames, the folding vehicle can be automatically folded or unfolded without manual operation, making it convenient, quick, and providing an excellent user experience. Furthermore, by incorporating an electric drive unit with a telescopic end, which can drive the front and rear frames to slide relative to each other a certain distance, the height of the folding seat can be adjusted by the swinging of the first, second, and third support rods to accommodate users of different heights.

[0018] Preferably, the vehicle also includes a steering shaft, a control lever, a connector, a steering component, and a steering arm. The steering shaft is rotatably mounted at the front end of the front frame. The control lever is located at the front end of the steering shaft. The connector is fixedly connected between the steering shaft and the control lever. The steering component is fixedly connected to the steering shaft. One end of the steering arm is pivotally connected to the steering component, and the other end is pivotally connected to the wheel seat to drive the wheel seat to swing. By connecting the control lever to the steering shaft using the connector, the control lever is located at the front end of the steering shaft, thereby increasing the distance from the control lever to the seat, thus increasing the seating space of the folding vehicle and improving riding comfort. Attached Figure Description

[0019] Figure 1 This is a top-view perspective view of the folding vehicle of the present invention.

[0020] Figure 2 This is a bottom-view perspective view of the folding vehicle of the present invention.

[0021] Figure 3 This is a side view of the folding vehicle of the present invention.

[0022] Figure 4 This is a perspective view of the folding seat of the folding vehicle of the present invention when unfolded.

[0023] Figure 5 This is an exploded view of the folding seat of the folding vehicle of the present invention.

[0024] Figure 6 This is a cross-sectional view of the folding seat of the folding vehicle of the present invention.

[0025] Figure 7 This is the present invention. Figure 6 Enlarged view of part A in the middle.

[0026] Figure 8 This is a diagram showing the folding seat of the folding vehicle of the present invention when it is fully folded.

[0027] Figure 9 This is the present invention. Figure 2Enlarged view of section B.

[0028] Figure 10 This is a diagram showing the rotational state of each component when the folding vehicle of this invention is folded up. Detailed Implementation

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

[0030] like Figures 1 to 6 As shown, the folding bicycle 100 of the present invention includes a front frame 1, a rear frame 2, a first support rod 3, a second support rod 4, a third support rod 5, and a folding seat 6. The first support rod 3, the second support rod 4, and the third support rod 5 form a seat folding bracket, and two sets of seat folding brackets are symmetrically arranged on the left and right sides of the folding bicycle 100. The folding seat 6 is disposed between the upper ends of the two sets of seat folding brackets. The front frame 1 is slidably arranged relative to the rear frame 2 in a front-rear direction; the lower end of the first support rod 3 is pivotally connected to the front end of the rear frame 2, and the upper end is pivotally connected to the lower end of the third support rod 5; the lower end of the second support rod 4 is pivotally connected to the rear end of the front frame 1. The first support rod 3 and the second support rod 4 are pivotally connected in a cross manner. The folding seat 6 includes a seat 61, a backrest 62, a traction member 63, and a locking member 64. Two traction members 63 and two locking members 64 are symmetrically arranged on the left and right sides of the rear end of the seat 61 to jointly lock or unlock the sides of the backrest 62. The upper end of the second support rod 4 is pivotally connected to the lower front end of the seat 61; the upper end of the third support rod 5 is pivotally connected to the lower rear end of the seat 61. A locking part 611 is provided on the lower rear end of the seat 61, and the upper end of the third support rod 5 is pivotally connected to the locking part 611. The backrest 62 is pivotally connected to the seat 61, and the locking member 64 is movably disposed on the backrest 62. The traction member 63 is disposed on the backrest 62, one end of which is connected to the locking member 64 and drives the locking member 64 to extend or retract into the backrest 62, so that when the backrest 62 is unfolded relative to the seat 61, it extends outward and engages with the locking part 611 for locking. In this embodiment, the locking member 64 is a cylindrical locking pin, and the locking part 611 is provided with a locking hole 611a. The locking pin is inserted into the locking hole 611a to achieve engagement and locking.

[0031] Please refer to the following: Figures 4 to 6The rear end of the seat 61 extends into a pivot portion 612. The backrest 62 includes a support arm 621 and a back panel 622. The support arms 621 are symmetrically arranged on the left and right sides of the rear end of the seat 61. The lower end of the support arm 621 is pivotally connected to the pivot portion 612. The back panel 622 is fixed to the support arm 621. The locking member 64 is slidably disposed inside the support arm 621 near one end of the seat 61. The traction member 63 passes through the interior of the support arm 621 and connects to the locking member 64. More specifically, the support arm 621 has a seat body 623 at one end near the seat 61. The seat body 623 has a sliding hole 623a. The central axis of the sliding hole 623a extends along the length of the support arm 621. The locking member 64 is slidably disposed in the sliding hole 623a to extend out of the lower end of the support arm 621 or retract into it.

[0032] For example Figure 6 and Figure 7 As shown, the folding seat 6 also includes a reset member 66, which is disposed between the backrest 62 and the locking member 64, and provides an elastic force that allows the locking member 64 to extend out of the backrest 62. Specifically, the reset member 66 is disposed in the sliding hole 623a, with one end abutting against the seat body 623 and the other end abutting against the locking member 64. By providing the reset member 66, the elastic force of the reset member 66 allows the locking member 64 to automatically engage with the locking part 611, thereby achieving automatic locking between the backrest 62 and the seat 61, simplifying the operation steps and improving the convenience of use. The locking part 611 is provided with a guide slope 611b to guide the locking member 64 to retract into the backrest during the unfolding of the backrest 62 relative to the seat 61, avoiding interference. In this embodiment, the reset member 66 is a compression spring, which is sleeved on the locking pin.

[0033] Please see again Figure 4 and Figure 5The folding seat 6 also includes an operation switch 67, which is located on the rear side of the backrest 62. One end of the traction member 63 extends from the support arm 621 into the sliding hole 623a and connects to the end of the locking member 64. The other end of the traction member 63 extends to the rear side of the backrest 62 and connects to the operation switch 67. The two traction members 63 located on both sides of the two folding seats 6 are connected to the same operation switch 67, so that the locking members 64 on both sides can be simultaneously disengaged from the locking hole 611a with only one operation of the operation switch 67. The traction members 63 are convenient for users to operate without affecting seating. By setting the operation switch 67, users can operate the traction members 63 more conveniently, improving the ease of unlocking.

[0034] like Figures 5 to 7 The folding seat 6 also includes a positioning mechanism 68, which is disposed between the backrest 62 and the seat 61 to position the backrest 62. By providing the positioning mechanism 68, the locking member 64 and the locking part 611 can accurately position the backrest 62 relative to the seat 61 before locking, thereby improving the accuracy of the alignment of the locking member 64 and the locking part 611. Furthermore, after the locking member 64 and the locking part 611 are released, the backrest 62 is positioned relative to the seat 61, thus preventing the backrest 62 from accidentally flipping over due to sudden release from the seat 61 and improving safety during use.

[0035] For example Figures 5 to 7Specifically, the positioning mechanism 68 includes a positioning protrusion 681, a positioning recess 682, and an elastic element 683. The positioning protrusion 681 is disposed on one of the backrest 62 and the seat 61, and the positioning recess 682 is disposed on the other of the backrest 62 and the seat 61. The front end of the positioning protrusion 681 is a protruding spherical surface, and the positioning recess 682 is an inwardly recessed spherical surface. When the locking element 64 engages with the locking part 611, the spherical surface of the positioning protrusion 681 is engaged within the spherical surface of the positioning recess 682. Through the cooperation of the positioning protrusion 681 and the positioning recess 682, the backrest 62 and the seat 61 can be quickly and accurately positioned, making positioning simple and convenient. More specifically, the support arm 621 has a through hole, and the positioning protrusion 681 is slidably disposed in the through hole and can extend out of or retract into the through hole, with the extension and retraction direction perpendicular to the sliding direction of the locking pin. The positioning recess 682 is located inside the pivot portion 612, allowing the pivot portion 612 to connect to the backrest 62 while concealing the positioning mechanism 68 within, resulting in a simpler and more aesthetically pleasing design for the folding seat 6. The elastic element 683 is located inside the support arm 621, with one end abutting against the positioning protrusion 681. The elastic element 683 provides an elastic force that allows the positioning protrusion 681 to extend into the positioning recess 682. By using the elastic element 683 to push the positioning protrusion 681, the positioning protrusion 681 can automatically engage with the positioning recess 682, improving ease of use.

[0036] like Figure 1 and Figure 2 As shown, the folding bicycle 100 also includes an electric drive device 7, which is disposed between the front frame 1 and the rear frame 2 to drive the front frame 1 and the rear frame 2 to slide relative to each other. The electric drive device 7 is an electric push rod. By using the electric drive device 7 to drive the front frame 1 and the rear frame 2 to move, the folding bicycle 100 can be automatically folded or unfolded without manual operation, making it convenient and quick to use, and providing an excellent user experience. In addition, by providing the electric drive device 7, which has a telescopic end, it can drive the front frame 1 and the rear frame 2 to slide relative to each other a certain distance. Thus, by swinging the first support rod 3, the second support rod 4, and the third support rod 5, the height of the folding seat 6 can be adjusted to accommodate users of different heights.

[0037] For example Figure 1 , Figure 2 and Figure 9The folding bicycle 100 also includes a steering shaft 8, a control lever 9, a connector 10, a steering component 110, and a steering arm 120. The steering shaft 8 is rotatably mounted at the front end of the front frame 1. The control lever 9 is located at the front end of the steering shaft 8. The connector 10 is fixedly connected between the steering shaft 8 and the control lever 9. The steering component 110 is fixedly connected to the steering shaft 8. One end of the steering arm 120 is pivotally connected to the steering component 110, and the other end is pivotally connected to the wheel seat to drive the wheel seat to swing. By connecting the control lever 9 to the steering shaft 8 using the connector 10, the control lever 9 is located at the front end of the steering shaft 8, thereby increasing the distance from the control lever 9 to the seat 61, thus increasing the seating space of the folding bicycle 100 and improving riding comfort.

[0038] In summary and in combination Figure 8 and Figure 10 The folding principle of the folding vehicle 100 of the present invention will be described in detail below:

[0039] When unfolded, the front frame 1 extends forward from the rear frame 2, the first support rod 3, the second support rod 4 and the third support rod 5 unfold, the backrest 62 opens relative to the seat 61, the positioning protrusion 681 engages with the positioning recess 682, and the locking member 64 is inserted into the locking hole 611a.

[0040] When the folding carriage 100 needs to be folded, the user can first pull the operation switch 67 upwards. The operation switch 67 drives the traction member 63, which pulls the locking member 64, causing the locking member 64 to disengage. Then, the user can forcefully push the backrest 62 towards the seat 61 and flip it over. At this time, the positioning protrusion 681 disengages from the positioning recess 682, and the backrest 62 can flip to a position close to the seat 61. Afterwards, the electric drive device 7 can be activated. The electric drive device 7 drives the front frame 1 and the rear frame 2 to slide relative to each other. The front frame 1 and the rear frame 2 slide towards each other in the front and rear directions. At the same time, the front frame 1 drives the lower end of the second support rod 4 to move backward relative to the rear frame 2, and the rear frame 2 drives the lower end of the first support rod 3 to move forward relative to the front frame 1. The third support rod 5 swings, causing the seat 61 to move downward towards the rear frame 2 and finally rest against the rear frame 2. At this point, the folding cart 100 can be folded up. When unfolded again, the electric drive device 7 is activated, causing the front frame 1 and the rear frame 2 to slide and unfold relative to each other, thereby raising the seat 61. Finally, the backrest 62 is opened, causing it to rotate away from the seat 61. When the locking member 64 reaches the front end of the locking part 611, guided by the guide slope 611b, the locking member 64 retracts into the support arm 621 inside the backrest 62. After the backrest 62 is fully opened, the positioning protrusion 681 engages with the positioning recess 682, and the locking member 64 aligns with the locking hole 611a and automatically extends into the locking hole 611a under the elastic force of the reset member 66, so that the backrest 62 and the seat 61 are unfolded and locked.

[0041] Compared with the prior art, the present invention pivotally connects the backrest 62 to the seat 61, allowing the backrest 62 to rotate relative to the seat 61. When the backrest 62 rotates towards the seat 61, the backrest 62 and the seat 61 are in a folded state; when the backrest 62 rotates away from the seat 61, the backrest 62 and the seat 61 are in an unfolded state. Furthermore, by movably providing a locking member 64 on the backrest 62 and a locking part 611 on the seat 61, and using a traction member 63 to drive the locking member 64 to engage or disengage from the locking part 611, the locking member 64 and the locking part 611 can be locked or unlocked to each other. Therefore, the backrest 62 and the seat 61 are mutually locked when unfolded or can be folded together after being unlocked, resulting in a very simple structure. When applied to the folding bicycle 100, the backrest 62 can be unfolded or folded independently without needing to be linked to the folding bicycle 100 for folding. This eliminates the need for a linkage structure that links the folding seat 6 to the folding bicycle 100, further simplifying the structure of the folding bicycle 100. Furthermore, with the folding seat 100 of this invention, the height of the seat 61 can be adjusted by changing the folding state of the front frame 1 and the rear frame 2 without affecting the state of the backrest 62. Therefore, the frame can be used in different states, accommodating users of different heights. Additionally, the folding seat 100 of this invention only requires the movement of the traction member 63 to activate it, which in turn drives the locking member 64 and the locking part 611 to unlock and fold, making operation very convenient and quick. After folding, the backrest 62 is close to the seat 61, further reducing the folded volume of the folding bicycle 100 and improving storage and portability.

[0042] The above-disclosed examples are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention shall still fall within the scope of the present invention.

Claims

1. A foldable seat, characterized by: The folding seat comprises a seat, a backrest, a pulling member and a locking member. The rear end of the seat is provided with a locking portion. The backrest is pivotally connected to the seat. The locking member is movably arranged on the backrest. The pulling member is arranged on the backrest and connected to the locking member at one end. The pulling member drives the locking member to extend out of or retract into the backrest, so as to extend out of the backrest and lock with the locking portion when the backrest is unfolded relative to the seat. The folding seat further comprises a positioning mechanism arranged between the backrest and the seat to position the backrest. The positioning mechanism comprises a positioning convex and a positioning concave. The positioning convex is arranged on one of the backrest and the seat and extends in a direction perpendicular to the extending direction of the locking member. The positioning concave is arranged on the other of the backrest and the seat. The front end of the positioning convex is a protruding spherical surface, and the positioning concave is an inwardly recessed spherical surface. The positioning mechanism further comprises a resilient member providing an elastic force for extending the positioning convex into the positioning concave. When the locking member is locked with the locking portion, the positioning convex is locked in the positioning concave.

2. The foldable seat of claim 1, wherein: The folding seat further comprises an operation switch arranged on the rear side of the backrest. The other end of the pulling member extends to the rear side of the backrest and is connected to the operation switch.

3. The foldable seat of claim 1, wherein: The folding seat further comprises a reset member arranged between the backrest and the locking member and providing an elastic force for extending the locking member out of the backrest.

4. The foldable seat of claim 3, wherein: The locking portion is provided with a guide inclined surface to guide the locking member to retract into the backrest during unfolding of the backrest relative to the seat, so as to avoid interference.

5. The foldable seat of claim 1, wherein: The backrest comprises an arm pivotally connected to the seat and a back plate fixed to the arm. The locking member is slidably arranged on the end of the arm close to the seat. The pulling member passes through the inside of the arm and is connected to the locking member.

6. The foldable seat of claim 1, wherein: The rear end of the seat extends a pivot portion. The backrest is pivotally connected to the pivot portion. The positioning concave is arranged on the pivot portion.

7. A foldable seat as claimed in any one of claims 1 to 6, characterised in that: The locking member is a locking pin. The locking portion is provided with a locking hole. The locking pin is inserted into the locking hole to achieve locking.

8. A folding vehicle characterized by: The folding seat comprises a front frame, a rear frame, a first support rod, a second support rod, a third support rod and the folding seat of any one of claims 1 to 7. The front frame is slidably arranged relative to the rear frame along the front-rear direction. The lower end of the first support rod is pivotally connected to the front end of the rear frame. The upper end of the first support rod is pivotally connected to the lower end of the third support rod. The lower end of the second support rod is pivotally connected to the rear end of the front frame. The upper end of the second support rod is pivotally connected to the front end of the seat of the folding seat. The first support rod and the second support rod are crossly pivotally connected. The upper end of the third support rod is pivotally connected to the rear end of the seat of the folding seat.

9. The foldable vehicle of claim 8, wherein: The folding seat further comprises an electric drive device arranged between the front frame and the rear frame to drive the front frame and the rear frame to slide relative to each other.

10. The foldable vehicle of claim 8, wherein: The steering shaft is rotatably arranged at the front end of the front frame, the control rod is located at the front end of the steering shaft, and the connecting piece is fixedly connected between the steering shaft and the control rod; the steering piece is fixedly connected to the steering shaft, one end of the steering arm is pivotally connected to the steering piece, and the other end of the steering arm is pivotally connected to the wheel seat, so as to drive the wheel seat to swing.

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