A folding self-standing lightweight wheelchair

Abstract

A kind of folding self-standing portable wheelchair, including seat rod, the two sides of seat rod are respectively provided with front support symmetrically, front support is connected front support joint, front support joint is rotatably connected with the upper portion of rear support rod by first rotating shaft, the upper portion of front support is rotatably connected with the front portion of seat rod on second rotating shaft;Seat support rod is rotatably connected with rear support rod by seventh rotating shaft;Backrest connects backrest fixed plate, the lower portion of backrest fixed plate is rotatably connected with the upper end of seat support by fourth rotating shaft, the lower end of seat support is connected the rear portion of seat rod, the rear portion of seat rod is rotatably connected with the upper end of seat support rod by sixth rotating shaft, the lower end of seat support rod is rotatably connected with the lower portion of rear support rod by seventh rotating shaft;The lower portion of backrest connecting rod is rotatably connected with the middle portion of rear support rod by fifth rotating shaft.This application is easy to fold, and the volume of wheelchair after folding is small.

Description

Technical Field

[0001] This invention relates to the field of wheelchair technology, and more specifically to a folding, self-standing, lightweight wheelchair. Background Technology

[0002] Wheelchairs are essential tools for rehabilitation and mobility for people with limb disabilities or limited mobility. However, most electric wheelchairs suffer from complex folding structures and cumbersome operation. Folding them often requires multiple steps, including bending over or even lifting the wheelchair, which is extremely inconvenient for users with mobility impairments. Furthermore, the folded wheelchair remains bulky, making it difficult to store in a vehicle trunk or carry. Therefore, it is necessary to design a lightweight, self-folding electric wheelchair to address these shortcomings of existing technology. Summary of the Invention

[0003] The purpose of this invention is to provide a foldable, self-standing, lightweight wheelchair that can effectively solve the technical problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A folding, self-standing, lightweight wheelchair includes: A seat post, with front supports symmetrically arranged on both sides of the seat post. The front supports are connected to front support joints. The front support joints are rotatably connected to the upper part of the rear support post via a first rotating shaft. The upper part of the front support is rotatably connected to the front part of the seat post via a second rotating shaft. The seat support rod is rotatably connected to the rear support rod via a seventh rotating shaft, and the seat support rod, the rear support rod, the front support, and the seat rod form a four-bar linkage mechanism; The backrest is connected to a backrest fixing plate. The lower part of the backrest fixing plate is rotatably connected to the upper end of the seat support member via a fourth rotating shaft. The lower end of the seat support member is connected to the rear part of the seat rod. The rear part of the seat rod is rotatably connected to the upper end of the seat support rod via a sixth rotating shaft. The lower end of the seat support rod is rotatably connected to the lower part of the rear support rod via a seventh rotating shaft. The backrest link is rotatably connected to the middle part of the rear support rod via a fifth rotating shaft, and to the backrest fixing plate via a third rotating shaft. The backrest fixing plate, seat support, seat support rod, rear support rod and backrest link form a five-bar linkage mechanism. The seat support rod and the rear support rod are connected via a movable component.

[0005] Preferably, the movable component includes a locking hook disposed on one side of the seat support rod, the two locking hooks are connected by an unlocking lever, and the first pivot hole on the locking hook is rotatably connected to the second pivot hole on the seat support rod; When folding, press down on the unlocking lever, the lock hook rotates around the first pivot hole, and the slot on the lock hook disengages from the lock pin on the rear support rod; When opened, press down on the unlock lever, the lock hook rotates around the pivot hole, the second slot on the lock hook disengages from the second locking post on the rear support rod, and after the first slot of the lock hook locks the first locking post on the rear support rod, the seat support rod rotates forward around the seventh rotation axis until it touches the limit block on the rear support rod, and the seat support rod stops rotating forward.

[0006] Preferably, it includes a torsion spring, which is sleeved in the first pivot hole on the lock hook, with the upper torsion arm of the torsion spring disposed on the seat support rod and the lower torsion arm disposed on the lock hook.

[0007] Preferably, after the front support rotates and moves closer to the rear support rod, and the backrest rotates and moves closer to the seat rod, the second slot on the locking hook hooks the second locking post on the rear support rod.

[0008] Preferably, the limiting block is fixedly connected to the rear support rod.

[0009] Compared with the prior art, the beneficial effects of the present invention are: When folding the wheelchair, press down on the unlock lever. The locking hook's first slot disengages from the locking pin on the rear support rod. Continue pulling the unlock lever backward, causing the seat support rod to rotate backward around the seventh rotation axis. The seat support rod pulls the seat rod backward, which in turn pulls the front support to rotate backward around the first rotation axis. Simultaneously, the seat support moves backward, causing the lower end of the backrest fixing plate to move backward. The upper end of the backrest fixing plate is held by the backrest connecting rod, so the backrest fixing plate rotates forward around the fourth rotation axis, and the backrest rotates forward around the fourth rotation axis. As a result, the front support rotates towards the rear support rod, and the backrest rotates towards the seat rod, causing the armrests to rotate forward and fold, thus completing the folding process. When the frame is folded, the locking hook's second slot hooks onto the locking pin on the rear support rod, locking the frame and preventing it from being opened. When opening the wheelchair, press down on the unlock lever. The locking hook rotates counterclockwise around the pivot hole, and the second slot of the locking hook disengages from the second locking pin on the rear support rod. Pulling up the backrest opens the frame. Simultaneously, the first slot of the locking hook engages with the first locking pin on the rear support rod, locking the wheelchair. After the frame is opened, while the locking hook is locking the first locking pin, the seat support rod rotates forward around the seventh rotation axis until it contacts the limiting block on the rear support rod, preventing further forward rotation. This invention features a simple folding operation and a compact folded size for easy carrying or storage. Attached Figure Description

[0010] Figure 1 This is a first-view view of the wheelchair in this invention; Figure 2 This is a side view of the wheelchair in this invention; Figure 3 This is a second-view view of the wheelchair in this invention; Figure 4 yes Figure 3 Schematic diagram of the connection between the central locking hook and the locking pin 1; Figure 5 This is a schematic diagram of the locking hook structure of the wheelchair in this invention; Figure 6 This is a schematic diagram of the wheelchair in its folded state locking mechanism in this invention; Figure 7 This is a schematic diagram of the wheelchair in the open state according to the present invention; In the diagram, 1. Backrest, 2. Armrest, 3. Controller, 4. Front support joint, 5. Seat rod, 502. Seat support component, 6. Front support, 7. Front wheel shock absorber spring, 8. Front wheel cover, 9. Foot pedal, 10. Backrest connecting rod, 11. Backrest fixing plate, 12. Seat support rod, 1201. Second pivot hole, 13. Rear support rod, 1301. Locking pin one, 1302. Locking pin two, 1303. Limiting block, 14. Rear... 15. Rear wheel shock absorber spring; 16. Rear wheel cover; 17. Rear wheel; 18. Lock hook; 19. First pivot hole; 10. Unlocking lever; 10. Slot 1; 11. Slot 2; 12. Torsion spring; 13. Anti-roll wheel; 24. First pivot shaft; 25. Second pivot shaft; 26. Third pivot shaft; 27. Fourth pivot shaft; 28. Fifth pivot shaft; 29. ​​Sixth pivot shaft; 20. Seventh pivot shaft; 21. Front wheel. Detailed Implementation

[0011] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention. Example

[0012] Please see Figure 1-7 As shown, a folding, self-standing lightweight wheelchair includes a seat post 5, a seat support rod 12, a backrest 1, a backrest connecting rod 10, and movable components. Front supports 6 are symmetrically arranged on both sides of the seat post 5. The front supports 6 are connected to front support joints 4. The front support joints 4 are rotatably connected to the upper part of the rear support rod 13 via a first rotating shaft 20. The upper part of the front support 6 is rotatably connected to the front part of the seat post 5 via a second rotating shaft 21. The front support 6 has an armrest 2 at the top and a front wheel 27 at the bottom. A front wheel shock absorber spring 7 is provided on one side of the front wheel 27, and a front wheel cover 8 is provided on the top. A foot pedal 9 is provided between the two front supports 6. A controller 3 is provided on one of the armrests 2, and the user controls the wheelchair of the present invention through the controller 3. The rear support rod has a rear wheel at the bottom, a rear wheel shock absorber spring on one side of the rear wheel, and a rear wheel cover on top. The seat support rod 12 and the rear support rod 13 are rotatably connected through the seventh rotating shaft 26, and the seat support rod 12, the rear support rod 13, the front support 6 and the seat rod 5 form a four-bar linkage mechanism; The backrest 1 is connected to the backrest fixing plate 11. The lower part of the backrest fixing plate 11 is rotatably connected to the upper end of the seat support 502 through the fourth rotating shaft 23. The lower end of the seat support 502 is connected to the rear part of the seat rod 5. The rear part of the seat rod 5 is rotatably connected to the upper end of the seat support rod 12 through the sixth rotating shaft 25. The lower end of the seat support rod 12 is rotatably connected to the lower part of the rear support rod 13 through the seventh rotating shaft 26. The lower part of the backrest link 10 is rotatably connected to the middle part of the rear support rod 13 via the fifth rotating shaft 24, and the upper part is rotatably connected to the backrest fixing plate 11 via the third rotating shaft 22. The backrest fixing plate 11, the seat support 502, the seat support rod 12, the rear support rod 13 and the backrest link 10 form a five-bar linkage mechanism. The seat support rod 12 and the rear support rod 13 are connected by a movable component; The movable component includes a locking hook 17 disposed on one side of the seat support rod 12. The two locking hooks 17 are connected by an unlocking lever 1702. The first pivot hole 1701 on the locking hook 17 is rotatably connected to the second pivot hole 1201 on the seat support rod 12. When folded, press down on the unlocking lever 1702, the locking hook 17 rotates around the first pivot hole 1701, and the slot 1703 on the locking hook 17 disengages from the locking post 1301 on the rear support rod 13; When opened, press down on the unlock lever 1702, the locking hook 17 rotates around the first pivot hole 1701, the second slot 1704 on the locking hook 17 disengages from the second locking pin 1302 on the rear support rod 13, and after the first slot 1703 of the locking hook 17 locks the first locking pin 1301 on the rear support rod 13, the seat support rod 12 rotates forward around the seventh rotating axis 26 until it touches the limiting block 1303 on the rear support rod 13, and the seat support rod 12 stops rotating forward. The front support 6 rotates toward the rear support rod 13 and the backrest 1 rotates toward the seat rod 5, and the second slot 1704 on the locking hook 17 hooks the second locking post 1302 on the rear support rod 13. The limiting block 1303 is fixedly connected to the rear support rod 13. Example

[0013] Please see Figure 1-7 As shown, a folding self-standing lightweight wheelchair includes a seat post 5, a backrest 1, a backrest connecting rod 10, and a movable component. Front supports 6 are symmetrically arranged on both sides of the seat post 5. The front supports 6 are connected to front support joints 4. The front support joints 4 are rotatably connected to the upper part of the rear support rod 13 through a first rotating shaft 20. The upper part of the front support 6 is rotatably connected to the front part of the seat post 5 on a second rotating shaft 21. Seat support rod 12, which is rotatably connected to rear support rod 13 via a seventh rotating shaft 26, and the seat support rod 12, rear support rod 13, front support 6 and seat rod 5 form a four-bar linkage mechanism; The backrest 1 is connected to the backrest fixing plate 11. The lower part of the backrest fixing plate 11 is rotatably connected to the upper end of the seat support 502 through the fourth rotating shaft 23. The lower end of the seat support 502 is connected to the rear part of the seat rod 5. The rear part of the seat rod 5 is rotatably connected to the upper end of the seat support rod 12 through the sixth rotating shaft 25. The lower end of the seat support rod 12 is rotatably connected to the lower part of the rear support rod 13 through the seventh rotating shaft 26. The lower part of the backrest link 10 is rotatably connected to the middle part of the rear support rod 13 via the fifth rotating shaft 24, and the upper part is rotatably connected to the backrest fixing plate 11 via the third rotating shaft 22. The backrest fixing plate 11, the seat support 502, the seat support rod 12, the rear support rod 13 and the backrest link 10 form a five-bar linkage mechanism. The seat support rod 12 and the rear support rod 13 are connected by a movable component; The movable component includes a locking hook 17 disposed on one side of the seat support rod 12. The two locking hooks 17 are connected by an unlocking lever 1702. The first pivot hole 1701 on the locking hook 17 is rotatably connected to the second pivot hole 1201 on the seat support rod 12. The wheelchair of the present invention includes a torsion spring 18, the torsion spring 18 being sleeved in a first pivot hole 1701 on a locking hook 17, the upper torsion arm of the torsion spring 18 being disposed on a seat support rod 12, and the lower torsion arm being disposed on a locking hook 17. The front support 6 rotates toward the rear support rod 13, and the backrest 1 rotates toward the seat rod 5. Then, the second slot 1704 on the locking hook 17 hooks the second locking post 1302 on the rear support rod 13.

[0014] The limiting block 1303 is fixedly connected to the rear support rod 13.

[0015] When folded, press down on the unlocking lever 1702, the locking hook 17 rotates around the first pivot hole 1701, and the slot 1703 on the locking hook 17 disengages from the locking post 1301 on the rear support rod 13; When opened, press down on the unlock lever 1702, the locking hook 17 rotates around the first pivot hole 1701, the second slot 1704 on the locking hook 17 disengages from the second locking pin 1302 on the rear support rod 13, and after the first slot 1703 of the locking hook 17 locks the first locking pin 1301 on the rear support rod 13, the seat support rod 12 rotates forward around the seventh rotating axis 26 until it touches the limiting block 1303 on the rear support rod 13, and the seat support rod 12 stops rotating forward. When the wheelchair needs to be folded, press down on the unlocking lever 1702. The locking hook 17 rotates counterclockwise around the first pivot hole 1701, and the locking hook 17's slot 1703 disengages from the locking pin 1301 on the rear support rod 13. Pulling the unlocking lever 1702 backward causes the seat support rod 12 to rotate backward around the seventh pivot axis 26. The seat support rod 12 pulls the seat rod 5 backward, and the seat rod 5 pulls the front support 6 backward around the first pivot axis 20. Simultaneously, the seat support 502 moves backward, causing the lower end of the backrest fixing plate 11 to move backward. The upper end of the backrest fixing plate 11 is held by the backrest connecting rod 10, so the backrest fixing plate 11 rotates forward around the fourth pivot axis 23, meaning the backrest 1 rotates forward around the fourth pivot axis 23. Thus, the front support 6 rotates closer to the rear support rod 13, and the backrest 1 rotates closer to the seat rod 5. Figure 3 Rotate armrest 2 forward and fold it to complete the folding process, as shown below. Figure 6 ; When the frame is folded, the second slot 1704 of the locking hook 17 hooks into the second locking post 1302 of the rear support rod 13, as follows: Figure 6 At this point, the frame is locked and cannot be opened.

[0016] To open the wheelchair, press down on the unlock lever 1702. The locking hook 17 rotates counterclockwise around the first pivot hole 1701, and the second slot 1704 of the locking hook 17 disengages from the second locking pin 1302 on the rear support rod 13. Pulling up the backrest 1 opens the wheelchair under the action of the five-bar and four-bar linkages. Simultaneously, the first slot 1703 of the locking hook 17 engages with the first locking pin 1301 of the rear support rod 13, locking the frame. Figure 3 .

[0017] After the wheelchair is opened, while the locking hook 17 locks the locking pin 1301, the seat support rod 12 rotates forward around the seventh rotation axis 26 until it contacts the limiting block 1303 of the rear support rod 13. The limiting block 1303 is fixedly connected to the rear support rod 13, and the seat support rod 12 cannot continue to rotate forward. Figure 7 As shown.

[0018] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the present invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A folding, self-standing, lightweight wheelchair, characterized in that, include: Seat rod (5), with front supports (6) symmetrically arranged on both sides of the seat rod (5), the front support (6) is connected to the front support joint (4), the front support joint (4) is rotatably connected to the upper part of the rear support rod (13) through the first rotating shaft (20), and the upper part of the front support (6) is rotatably connected to the front part of the seat rod (5) on the second rotating shaft (21). Seat support rod (12), the seat support rod (12) and the rear support rod (13) are rotatably connected through the seventh rotating shaft (26), and the seat support rod (12), the rear support rod (13), the front support (6) and the seat rod (5) form a four-bar linkage mechanism; Backrest (1), the backrest (1) is connected to backrest fixing plate (11), the lower part of the backrest fixing plate (11) is rotatably connected to the upper end of seat support (502) through the fourth rotating shaft (23), the lower end of seat support (502) is connected to the rear part of seat rod (5), the rear part of seat rod (5) is rotatably connected to the upper end of seat support rod (12) through the sixth rotating shaft (25), and the lower end of seat support rod (12) is rotatably connected to the lower part of rear support rod (13) through the seventh rotating shaft (26); Backrest link (10), the lower part of the backrest link (10) is rotatably connected to the middle part of the rear support rod (13) through the fifth rotating shaft (24), and the upper part is rotatably connected to the backrest fixing plate (11) through the third rotating shaft (22). The backrest fixing plate (11), seat support (502), seat support rod (12), rear support rod (13) and backrest link (10) form a five-bar linkage mechanism. The seat support rod (12) and the rear support rod (13) are connected by the movable component.

2. The folding, self-standing, lightweight wheelchair according to claim 1, characterized in that: The movable component includes a locking hook (17) disposed on one side of the seat support rod (12), the two locking hooks (17) are connected by an unlocking lever (1702), and the first pivot hole (1701) on the locking hook (17) is rotatably connected to the second pivot hole (1201) on the seat support rod (12); When folded, press down on the unlocking lever (1702), the locking hook (17) rotates around the first pivot hole (1701), and the slot (1703) on the locking hook (17) disengages from the locking pin (1301) on the rear support rod (13); When opened, press down on the unlock lever (1702), the lock hook (17) rotates around the first pivot hole (1701), the second slot (1704) on the lock hook (17) disengages from the second locking pin (1302) on the rear support rod (13), and after the first slot (1703) of the lock hook (17) locks the first locking pin (1301) on the rear support rod (13), the seat support rod (12) rotates forward around the seventh rotating axis (26) until it touches the limit block (1303) on the rear support rod (13), and the seat support rod (12) stops rotating forward.

3. A folding, self-standing, lightweight wheelchair according to claim 2, characterized in that: Includes a torsion spring (18), which is sleeved on the first pivot hole (1701) of the lock hook (17). The upper torsion arm of the torsion spring (18) is set on the seat support rod (12), and the lower torsion arm is set on the lock hook (17).

4. A folding, self-standing, lightweight wheelchair according to claim 3, characterized in that: The front support (6) rotates toward the rear support rod (13), and the backrest (1) rotates toward the seat rod (5). The second slot (1704) on the locking hook (17) hooks the second locking post (1302) on the rear support rod (13).

5. A folding, self-standing, lightweight wheelchair according to claim 2, characterized in that: The limiting block (1303) is fixedly connected to the rear support rod (13).

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