Folding wheelchair
By optimizing the wheelchair structure design and utilizing a combination of components such as limiting plates, elastic pins, and positioning grooves, the problem of large size when folded in existing foldable wheelchairs has been solved, achieving a flattened and compressed wheelchair that improves the convenience of carrying and storing.
Patent Information
- Application Number
- CN202520390751.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-07
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-07
AI Technical Summary
Existing foldable wheelchairs are still quite large when folded, making it inconvenient for users to carry and store them when traveling.
By optimizing the structural design of the wheelchair, including the rotational connection methods of the backrest, seat, support frame, base, front wheel assembly, and rear wheel assembly, and by using a combination of components such as limiting plates, elastic pins, and positioning grooves, the wheelchair can be flattened and compressed as much as possible when folded, reducing its size and volume.
It achieves vertical flattening and compression of the wheelchair in the folded state, significantly reducing the size and volume after folding, and improving the convenience of carrying and storing.
Smart Images
Figure CN223944566U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a wheelchair, in particular to a folding wheelchair. BACKGROUND
[0002] The folding wheelchair provides the use advantage beneficial to storage and carrying, but the existing foldable wheelchair still has a large size after folding and converging, which brings inconvenience in space to the user when carrying and storing. UTILITY MODEL CONTENTS
[0003] The utility model aims at providing a folding wheelchair which has a small size and volume after folding and converging.
[0004] TECHNICAL SCHEME: A folding wheelchair comprises a backrest, a seat plate, a support frame, a base, a front wheel set and a rear wheel set, the backrest is above the seat plate, the lower end of the backrest is rotationally connected with the rear side of the seat plate, the base is below the seat plate, the support frame is between the seat plate and the base, the upper end of the support frame is rotationally connected with the rear side of the seat plate, the lower end of the support frame is rotationally connected with the front side of the base, the front wheel set is in front of the base, two front wheels of the front wheel set are respectively rotationally connected with the left and right sides of the base, and two rear wheels of the rear wheel set are respectively installed and connected with the left and right sides of the base behind the two front wheels.
[0005] Further, a connecting arm is arranged on the front wheel, the connecting arm comprises a support rod and an inverted U-shaped clamping plate, a connecting column at the top of the U-shaped clamping plate is vertically arranged in an axial hole at the front end of the support rod to form a first rotational connection, two side plates of the U-shaped clamping plate are respectively arranged on the two sides of the front wheel and are installed and fixed with the two ends of the wheel shaft of the front wheel, and the rear end of the support rod is rotationally connected with the base to form a second rotational connection; in a wheelchair use state, the support rod is turned to the front moving direction of the wheelchair to fix the second rotational connection, and in a wheelchair folding state, the support rod is turned to the rear retreating direction of the wheelchair; when the front wheel is folded, the length of the wheelchair in the front-rear direction is shortened.
[0006] Further, in the wheelchair use state, an inner side of the rear end of the support rod is provided with a positioning groove, and a fixing pin is fixed in a first positioning hole on the base. When the front wheel is used or folded, the fixing pin can be inserted in the positioning groove, so that the wheelchair can be used in different states.
[0007] Further, a limiting plate is arranged between the support frame and the base, the limiting plate is located behind the rotational connection between the lower end of the support frame and the front side of the base, and the two ends of the limiting plate are respectively connected with the support frame and the base; in the wheelchair use state, the limiting plate makes the support frame be inclined to the horizontal direction, and the limiting plate positions the angle of the support frame.
[0008] Further, the seat plate bottom surface is provided with a triangular support plate, a first side of the triangular support plate is fixed with the seat plate bottom surface, and the upper end of the support frame is connected with a second side of the triangular support plate at two positions from top to bottom, the upper position is that the upper end of the support frame is rotationally connected with the rear side of the seat plate, and the second side is a side in the same inclination direction as the support frame in the wheelchair using state. The triangular support plate positions the angle of the support frame.
[0009] Further, the left and right sides of the rear side of the seat plate are respectively provided with fixed connecting seats, the connecting seats are provided with assembly cavities in the middle, the left and right sides of the backrest are respectively vertical rods, horizontal sleeve rods are arranged on the front sides of the lower ends of the vertical rods, the lower ends of the vertical rods and the sleeve rods are located in the assembly cavities, shaft pins are sequentially arranged in the outer side wall surfaces of the connecting seats, the interiors of the sleeve rods and the inner side wall surfaces of the connecting seats, the shaft pins are fixed at the two ends and the inner side wall surfaces, elastic column pins are further arranged on the inner side wall surfaces, and pull ropes are connected with the tail portions of the telescopic rods of the elastic column pins; in the wheelchair using state, the head portions of the telescopic rods of the elastic column pins are inserted into the second positioning holes in the lower ends of the vertical rods, and in the wheelchair folding state, the head portions of the telescopic rods are pulled out of the second positioning holes by pulling the pull ropes. The assembly of the connecting seats and the lower ends of the vertical rods makes the backrest foldable on the seat plate, and the two are parallel.
[0010] Beneficial effects: the wheelchair structure can make the vertical direction as flat as possible in the folding state, reduce the size after folding and converging, and achieve a smaller size and volume. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 FIG. 1 is a structure schematic diagram of a wheelchair in a using state according to the present application;
[0012] Figure 2 FIG. 4 is a connecting structure schematic diagram of a front wheel group, a rear wheel group and a base according to the present application;
[0013] Figure 3 FIG. 6 is a connecting structure schematic diagram of a support frame and a base according to the present application;
[0014] Figure 4 FIG. 8 is a connecting structure schematic diagram of a support frame, a seat plate and a backrest and the seat plate according to the present application;
[0015] Figure 5 FIG. 10 is a connecting structure schematic diagram of a vertical rod and a connecting seat according to the present application;
[0016] Figure 6 FIG. 12 is a structure schematic diagram of a wheelchair in a folding state according to the present application. DETAILED DESCRIPTION
[0017] The present application is further illustrated in combination with the drawings and specific embodiments.
[0018] A folding wheelchair, as shown in the attached image Figure 1 As shown, it includes a backrest 1, a seat 2, a support frame 3, a base 4, a front wheel assembly 5, and a rear wheel assembly 6.
[0019] Combined with appendix Figure 4 , 5 As shown, the backrest 1 is above the seat plate 2, and the lower end of the backrest 1 is rotatably connected to the rear side of the seat plate 2. Vertical rods 11 are located on the left and right sides of the backrest 1, and connecting seats 21 are respectively provided on the left and right sides of the rear side of the seat plate 2. The connecting seats are fixed to the seat plate, and the connecting seats 21 have an assembly cavity 211 in the middle. The lower ends of the two vertical rods are respectively located in the assembly cavities of the two connecting seats. A horizontal sleeve 12 is provided on the front side of the lower end of the vertical rod 11, and the sleeve 12 is also located in the assembly cavity 211. A pin 22 passes sequentially through the outer wall surface 212 of the connecting seat 21, inside the sleeve 12, and on the inner wall surface 213 of the connecting seat 21. Both ends of the pin 22 are fixed to the outer wall surface 212 and the inner wall surface 213 respectively. When the backrest rotates, the sleeve rotates relative to the fixed pin. (See attached diagram.) Figure 6 As shown, an elastic pin 23 is also provided on the inner wall surface 213. The head of the telescopic rod of the elastic pin 23 is opposite to the second positioning hole 13 on the lower end of the vertical rod 11, and a pull rope is connected to the tail of the telescopic rod of the elastic pin 23. Pulling the pull rope causes the head of the telescopic rod to retract inward and be pulled out from the second positioning hole. At this time, the backrest can rotate around the pivot pin. Rotating the backrest downward will allow it to close onto the seat plate, putting the backrest in a folded state. When the backrest rotates upward to the position where the second positioning hole is close to the head of the telescopic rod, since the head of the telescopic rod is elastically connected to the elastic pin, as the backrest continues to rotate, the second positioning hole contacts and engages with the head of the telescopic rod, allowing the head of the telescopic rod to extend into the second positioning hole and be positioned there. Since the pivot pin and the elastic pin form two points of positioning on the same vertical rod, the angle of the backrest relative to the seat plate is fixed, putting the backrest in the use state. It can be seen that the relative position of the pivot pin and the surface of the seat plate is related to the folding angle of the backrest relative to the seat plate.
[0020] Combined with appendix Figure 3 , 4As shown, the base 4 is below the seat plate 2, the support frame 3 is between the seat plate 2 and the base 4, the upper end of the support frame 3 is rotatably connected to the rear side of the seat plate 2, and the lower end of the support frame 3 is rotatably connected to the front side of the base 4. The support frame 3 can be H-shaped, and the left and right sides each have a support rod 33, and the lower end of the support rod 33 is rotatably connected to the front side of the base 4 by a shaft pin. A limiting plate 31 is arranged between the support rod 33 and the base 4, and the limiting plate 31 is located at the rear side of the rotatable connection of the lower end of the support rod, and the two ends of the limiting plate 31 are connected to the support rod 33 and the base 4 respectively, so that the support frame 3 is inclined to the horizontal direction, and the support frame is in a use state, and the connection at one end is achieved by an elastic column pin. When the elastic column pin is disengaged from the positioning connection, the support frame can rotate around the shaft pin as the rotation point, and the support frame can be folded on the base by rotating downward, and the support frame is in a folded state. The bottom surface of the seat plate 2 is provided with a triangular support plate 32, the first side of the triangular support plate 32 is fixed to the bottom surface of the seat plate 2, the upper and lower positions of the upper end of the support rod 33 are connected to the second side of the triangular support plate 32 respectively, the second side is inclined in the same direction as the support frame in the use state of the wheelchair, the upper position is rotatably connected by a shaft pin, and the lower position is connected by an elastic column pin. When the elastic column pin is disengaged from the positioning connection, the support frame can rotate around the shaft pin as the rotation point, and the two ends of the support rod are rotatably connected, so that the support frame can be horizontal, and the seat plate can be folded on the support frame.
[0021] The accompanying drawings are used to Figure 2 As shown, the front wheel set 5 is in front of the base 4, and the two front wheels 51 of the front wheel set 5 are rotatably connected to the left and right sides of the base 4 respectively. The front wheel 51 is provided with a connecting arm 52, the connecting arm 52 includes a support rod 521 and a U-shaped clamping plate 522, the U-shaped clamping plate is inverted, and the two side plates 525 are located on the left and right sides of the front wheel 51 and are fixedly connected to the two ends of the wheel shaft 53 of the front wheel 51. When the wheelchair is running, the tire rotates around the wheel shaft as the center axis, the connecting column 524 at the top of the U-shaped clamping plate 522 is vertically arranged in the shaft hole 523 at the front end of the support rod 521 to form a first rotatable connection, the rear end of the support rod 521 is rotatably connected to the base 4, and in the use state of the front wheel, the front wheel rotates forward around the second rotatable connection through the support rod, so that the length of the support rod is forward, the support rod is turned to the forward direction of the wheelchair, and the rear end of the support rod 521 is provided with a positioning groove 526, which is fixed with the first positioning hole 41 on the base through a fixed pin. When the fixed pin is removed, the front wheel rotates backward around the second rotatable connection through the support rod, so that the length of the support rod is backward, the support rod is turned to the backward direction of the wheelchair, and the front wheel is in a folded state.
[0022] The two rear wheels 61 of the rear wheel set 6 are rotatably connected to the left and right sides of the base 4 respectively behind the two front wheels 51, and the use state and the folded state of the rear wheel are the same.
[0023] The wheelchair structure of the utility model, like the accompanying drawings Figure 6 As shown, the wheelchair structure can be as flat as possible in the vertical direction in the folded state, the size after folding and closing can be reduced, and a smaller size and volume can be achieved.
Claims
1. A folding wheelchair, characterized in that: The device includes a backrest (1), a seat (2), a support frame (3), a base (4), a front wheel assembly (5), and a rear wheel assembly (6). The backrest (1) is above the seat (2), and the lower end of the backrest (1) is rotatably connected to the rear side of the seat (2). The base (4) is below the seat (2). The support frame (3) is between the seat (2) and the base (4). The upper end of the support frame (3) is rotatably connected to the rear side of the seat (2), and the lower end of the support frame (3) is rotatably connected to the front side of the base (4). The front wheel assembly (5) is in front of the base (4), and the two front wheels (51) of the front wheel assembly (5) are rotatably connected to the left and right sides of the base (4) respectively. The two rear wheels (61) of the rear wheel assembly (6) are installed and connected to the left and right sides of the base (4) respectively behind the two front wheels (51).
2. The folding wheelchair according to claim 1, characterized in that: A connecting arm (52) is provided on the front wheel (51). The connecting arm (52) includes a support rod (521) and an inverted U-shaped clamp (522). The connecting post (524) at the top of the U-shaped clamp (522) is vertically inserted into the shaft hole (523) at the front end of the support rod (521) to form a first rotatable connection. The two side plates (525) of the U-shaped clamp (522) are located on both sides of the front wheel (51) and are fixed to both ends of the wheel axle (53) of the front wheel (51). The rear end of the support rod (521) forms a second rotatable connection with the base (4). When the wheelchair is in use, the support rod (521) is turned to the forward direction of the wheelchair to fix the second rotatable connection. When the wheelchair is folded, the support rod (521) is turned to the backward direction of the wheelchair.
3. The folding wheelchair according to claim 2, characterized in that: When the wheelchair is in use, the inner side of the rear end of the support rod (521) is provided with a positioning groove (526), which is fixed to the first positioning hole (41) on the base (4) with a fixing pin.
4. The folding wheelchair according to claim 1, characterized in that: A limiting plate (31) is provided between the support frame (3) and the base (4). The limiting plate (31) is located behind the rotating connection between the lower end of the support frame (3) and the front side of the base (4). The two ends of the limiting plate (31) are connected to the support frame (3) and the base (4) respectively. When the wheelchair is in use, the limiting plate (31) makes the support frame (3) tilted in the horizontal direction.
5. The folding wheelchair according to claim 1, characterized in that: The bottom surface of the seat plate (2) is provided with a triangular support plate (32). The first side of the triangular support plate (32) is fixed to the bottom surface of the seat plate (2). The upper end of the support frame (3) is connected to the second side of the triangular support plate (32) at two positions, one above and one below. The upper position is where the upper end of the support frame (3) is rotatably connected to the rear side of the seat plate (2). The second side is the side with the same tilt direction as the support frame (3) when the wheelchair is in use.
6. The folding wheelchair according to claim 1, characterized in that: Fixed connecting seats (21) are respectively provided on the left and right sides of the rear side of the seat plate (2). The connecting seats (21) have an assembly cavity (211) in the middle. The left and right sides of the backrest (1) are vertical rods (11). A horizontal sleeve (12) is provided on the front side of the lower end of the vertical rod (11). The lower end of the vertical rod (11) and the sleeve (12) are located in the assembly cavity (211). The shaft pin (22) passes through the outer wall surface (212) of the connecting seat (21), the sleeve (12), and the connecting seat (211) in sequence. The inner wall (213) of the seat (21) is fixed at both ends to the outer wall (212) and the inner wall (213). An elastic pin (23) is also provided on the inner wall (213). A pull rope is connected to the end of the telescopic rod of the elastic pin (23). When the wheelchair is in use, the head of the telescopic rod of the elastic pin (23) extends into the second positioning hole (13) at the lower end of the vertical rod (11). When the wheelchair is folded, the pull rope is pulled to pull the head of the telescopic rod out of the second positioning hole (13).