Portable and foldable electric wheelchair

Abstract

The utility model discloses a portable and foldable electric wheelchair, which relates to the technical field of electric wheelchairs and comprises an electric wheelchair body and a base arranged on the lower side of the electric wheelchair body, wheels are mounted at four corners of the base, a working cavity is arranged at the top of the base, and a lifting mechanism is arranged in the working cavity. A lifting mechanism is arranged on the base, a seat plate is arranged on the top of the lifting mechanism, a foldable back plate is arranged on the base, a foldable armrest frame is further arranged on the base, and the seat plate can be in sliding fit with the back plate and the armrest frame. By means of the liftable design of the seat plate, when the electric wheelchair is used, the lifting plate is lifted, the electric wheelchair can be used by a user, meanwhile, the back plate and the armrest frame can be supported, and therefore the purpose of directly using the electric wheelchair is achieved.

Description

Technical Field

[0001] This utility model relates to the field of electric wheelchair technology, and in particular to a lightweight and foldable electric wheelchair. Background Technology

[0002] As an important assistive mobility tool, the demand for lightweight, portable, and adaptable electric wheelchairs is becoming increasingly prominent. Electric wheelchairs require the installation of motors and batteries. With advancements in battery technology, from the bulky lead-acid batteries of the past to the current lithium-ion batteries, lightweight materials and high energy density have been achieved, increasing energy storage capacity. Simultaneously, changes in the materials of the metal structure in existing electric wheelchairs, such as the partial application of carbon fiber and magnesium-aluminum alloys, have enabled even lighter designs. Although existing electric wheelchairs have achieved significant improvements and breakthroughs in lightweighting, in practical use, they need to be frequently carried, such as placed in the trunk of a car. Therefore, enabling folding while maintaining original functionality and lightweight design has become a further research topic. Existing foldable electric wheelchairs mostly use a snap-fit ​​structure for folding, which is relatively cumbersome, and the various snaps are prone to damage, leading to a reduced lifespan of the electric wheelchair. Utility Model Content

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0004] In view of the problems existing in the above and / or existing lightweight and foldable electric wheelchairs, this utility model is proposed.

[0005] Therefore, the problem that this utility model aims to solve is the inconvenience of folding existing lightweight electric wheelchairs.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a lightweight and foldable electric wheelchair, including an electric wheelchair body and a base disposed on the lower side of the electric wheelchair body. Wheels are installed on the four corners of the base. A working cavity is provided on the top of the base, and a lifting mechanism is provided inside the working cavity. A seat plate is provided on the top of the lifting mechanism. A foldable back plate is provided on the base. A foldable armrest frame is also provided on the base. The seat plate can slide with the back plate and the armrest frame.

[0007] As a preferred embodiment of the lightweight and foldable electric wheelchair described in this utility model, the lifting mechanism includes a first support rod, a second support rod, and a drive assembly. The first support rod is symmetrically arranged in the working cavity, and one end of the first support rod is rotatably connected to the interior of the working cavity. The second support rods are interlaced and rotatably connected to the first support rod. The top ends of the two second support rods are penetrated by a first rotating shaft, and the bottom ends of the two second support rods are also penetrated by a second rotating shaft. A first strip groove is provided on the side wall of the working cavity, and both ends of the second rotating shaft are slidably inserted into the two first strip grooves. The top ends of the two first support rods are penetrated by a third rotating shaft. Two strip plates are symmetrically arranged at the bottom of the seat plate, and a second strip groove is provided on the side of the strip plate near the third rotating shaft. Both ends of the third rotating shaft are slidably inserted into the two second strip grooves. Both ends of the first rotating shaft are rotatably connected to the ends of the two strip plates away from the second strip groove. The drive assembly is installed in the working cavity and is used to push the second rotating shaft to slide along the direction of the first strip groove.

[0008] As a preferred embodiment of the lightweight and foldable electric wheelchair described in this utility model, the drive assembly includes a motor and a moving block. The moving block is slidably disposed on the inner bottom wall of the working cavity along the direction of the first strip groove, and the moving block is disposed in the middle of the second rotating shaft. The output end of the motor is connected to a lead screw, which passes through the moving block and is threadedly engaged with the moving block.

[0009] As a preferred embodiment of the lightweight and foldable electric wheelchair described in this utility model, the back panel includes a fixed plate and a folding plate. The fixed plate is fixedly installed on the base, and the folding plate is rotatably connected to the fixed plate. A limiting groove is provided on the side of the fixed plate and the folding plate near the seat plate along the lifting direction of the seat plate, and a limiting slider matching the limiting groove is provided on the seat plate.

[0010] As a preferred embodiment of the lightweight and foldable electric wheelchair described in this utility model, the armrest frame includes a fixed frame and a folding frame. The fixed frame is fixedly installed on the top side of the seat plate, and the folding frame is rotatably connected to the fixed frame. The seat plate is provided with a through hole for the fixed frame or the folding frame to slide through.

[0011] As a preferred embodiment of the lightweight and foldable electric wheelchair described in this utility model, wherein: of the two fixing frames, the fixing frame on one side is higher than the fixing frame on the other side.

[0012] As a preferred embodiment of the lightweight and foldable electric wheelchair described in this utility model, it further includes a foot pedal, and a placement groove is provided on the front side of the base, with the foot pedal rotatably connected in the placement groove.

[0013] As a preferred embodiment of the lightweight and foldable electric wheelchair described in this utility model, it further includes a support block located below the foot pedal and fixedly connected to the side wall of the base.

[0014] As a preferred embodiment of the lightweight and foldable electric wheelchair described in this utility model, a folding rod is rotatably mounted on the side of the seat plate near the foot pedal, and a plug is provided at the bottom end of the folding rod.

[0015] As a preferred embodiment of the lightweight and foldable electric wheelchair described in this utility model, the foot pedal is provided with a socket adapted to the plug rod.

[0016] The beneficial effects of this utility model are as follows: the lifting mechanism can drive the seat plate to rise and fall, and the working cavity can house the lifting mechanism. When not in use, the seat plate can be lowered onto the base, thereby reducing the overall height. With the foldable back panel and foldable armrests, the back panel and armrests can be folded after the seat plate is folded down, thereby achieving the purpose of folding the whole to reduce the volume and make it easy to carry. With the lifting design of the seat plate, when in use, the lifting plate is raised, which can not only be used by the user, but also support the back panel and armrests, thereby realizing the purpose of directly using the electric wheelchair. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0018] Figure 1 This is a schematic diagram of the overall structure of a lightweight, foldable electric wheelchair.

[0019] Figure 2 This is a schematic diagram of the internal lifting mechanism of the working chamber in a lightweight, foldable electric wheelchair.

[0020] Figure 3 This is a schematic diagram of the structure of a lightweight, foldable electric wheelchair in its folded state.

[0021] Figure 4 This is a structural schematic diagram of a lightweight, foldable electric wheelchair from another perspective when it is folded.

[0022] Figure 5This is a structural diagram of a lightweight, foldable electric wheelchair, comprising a limiting slide, a limiting slider, a folding plate, a seat plate, a folding rod, and a plug rod.

[0023] In the diagram: 1. Base; 2. Wheel; 3. Working chamber; 4. Seat plate; 5. Support rod one; 6. Support rod two; 7. Rotating shaft one; 8. Rotating shaft two; 9. Strip groove one; 10. Rotating shaft three; 11. Strip groove two; 12. Motor; 13. Moving block; 14. Lead screw; 15. Fixing plate; 16. Folding plate; 17. Limiting slide groove; 18. Limiting slider; 19. Fixing frame; 20. Folding frame; 21. Foot pedal; 22. Placement groove; 23. Support block; 24. Folding rod; 25. Insert rod; 26. Insertion hole. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0027] Reference Figures 1-5This embodiment of the present invention provides a lightweight and foldable electric wheelchair, including an electric wheelchair body and a base 1 disposed on the lower side of the electric wheelchair body. Wheels 2 are mounted on the four corners of the base 1. A working cavity 3 is provided on the top of the base 1, and a lifting mechanism is provided inside the working cavity 3. A seat plate 4 is provided on the top of the lifting mechanism. A foldable back panel is provided on the base 1, and a foldable armrest frame is also provided on the base 1. The seat plate 4 can slide with the back panel and the armrest frame. The lifting mechanism can drive the wheelchair. The seat 4 can be raised and lowered. The lifting mechanism can be placed in the working cavity 3. When not in use, the seat 4 can be lowered onto the base 1 to reduce the overall height. With the foldable back panel and foldable armrests, the back panel and armrests can be folded after the seat 4 is folded down, thus achieving the purpose of folding down the whole to reduce the volume and make it easy to carry. With the height-adjustable design of the seat 4, when in use, the lifting platform is raised, which can not only be used by the user, but also support the back panel and armrests, thus realizing the purpose of directly using the electric wheelchair.

[0028] Reference Figure 2 The lifting mechanism includes support rod 5, support rod 6, and a drive assembly. Support rod 5 is symmetrically arranged within the working chamber 3, with one end of each support rod 5 rotatably connected to the interior of the working chamber 3. Support rod 6 is alternately and rotatably connected to support rod 5. A rotating shaft 7 passes through the top ends of the two support rods 6, and a rotating shaft 8 passes through the bottom ends of the two support rods 6. A strip groove 9 is provided on the side wall of the working chamber 3, and both ends of the rotating shaft 8 are slidably inserted into the two strip grooves 9. A rotating shaft 10 passes through the top ends of the two support rods 5. The bottom end of the seat plate 4 is symmetrically arranged... Two strip plates are placed, and a strip groove 11 is provided on the side of the strip plates near the rotating shaft 10. The two ends of the rotating shaft 10 are respectively slidably inserted into the two strip grooves 11. The two ends of the rotating shaft 7 are rotatably connected to the ends of the two strip plates away from the strip grooves 11. The driving assembly is installed in the working cavity 3 and is used to push the rotating shaft 8 to slide along the direction of the strip groove 9. The driving assembly can push the rotating shaft 8 to slide along the direction of the two strip grooves, thereby realizing the support and lowering of the X structure formed by the support rod 5 and the support rod 6, so that the height of the seat plate 4 can be adjusted.

[0029] Reference Figure 2The drive assembly includes a motor 12 and a moving block 13. The moving block 13 is slidably disposed on the inner bottom wall of the working cavity 3 along the direction of the strip groove 9, and the moving block 13 is disposed in the middle of the rotating shaft 8. The output end of the motor 12 is connected to a lead screw 14, which passes through the moving block 13 and is threadedly engaged with the moving block 13. By rotating the motor 12 in both directions, the lead screw 14 can be rotated in both directions, thereby moving the moving block 13. The moving block 13 and the working cavity 3 are provided with a sliding groove and a slider structure in the moving direction to improve the sliding stability of the moving block 13.

[0030] Reference Figures 1-5 The back panel includes a fixed plate 15 and a folding plate 16. The fixed plate 15 is fixedly installed on the base 1, and the folding plate 16 is rotatably connected to the fixed plate 15. The fixed plate 15 and the folding plate 16 are provided with a limiting groove 17 on the side of the fixed plate 15 and the folding plate 16 near the seat plate 4 along the lifting direction of the seat plate 4. A limiting slider 18 matching the limiting groove 17 is provided on the seat plate 4. When the electric wheelchair is in use, the folding plate 16 is raised. Due to the sliding cooperation between the limiting slider 18 and the limiting groove 17, the seat plate 4 moves upward onto the folding plate 16, which can support the folding plate 16, realizing the open use state of the back panel.

[0031] Reference Figures 1-4 The armrest frame includes a fixed frame 19 and a folding frame 20. The fixed frame 19 is fixedly installed on the top side of the seat plate 4, and the folding frame 20 is rotatably connected to the fixed frame 19. The seat plate 4 is provided with a through hole for the fixed frame 19 or the folding frame 20 to slide through. With the through hole, when using the electric wheelchair, the folding frame 20 can be raised, and the seat plate 4 can support the back panel at the same time. Thus, by raising and lowering the seat plate 4, the back panel and the armrest frame can be opened and folded at the same time, making the operation more convenient. Of the two fixed frames 19, one fixed frame 19 is higher than the other fixed frame 19, which facilitates folding.

[0032] The folding direction of both the folding plate 16 and the folding frame 20 is towards the seat plate 4.

[0033] Reference Figures 1-3The system also includes a foot pedal 21. A placement groove 22 is provided on the front side of the base 1. The foot pedal 21 is rotatably connected to the placement groove 22. The system also includes a support block 23, which is located below the foot pedal 21 and is fixedly connected to the side wall of the base 1. The foot pedal 21 can be flipped to support the user's feet. The support block 23 can support the flipped foot pedal 21. A folding rod 24 is rotatably installed on the side of the seat plate 4 near the foot pedal 21. By folding the folding plate 16, the length of the seat plate 4 can be reduced, making it easier for the user to bend their knees. The bottom end of the folding rod 24 is provided with a plug rod 25. The foot pedal 21 is provided with a socket 26 that matches the plug rod 25. When the seat plate 4 is lowered and retracted, the foot pedal 21 is flipped into the placement groove 22, and the plug rod 25 is inserted into the socket 26, thus stabilizing the foot pedal 21.

[0034] Working principle: In this embodiment, the lightweight and foldable electric wheelchair is first taken out as a whole. It should be noted that the electric wheelchair in this embodiment uses a high-strength metal material and a lightweight lithium battery to reduce the overall weight. Moreover, the wheels and drive device in the electric wheelchair body of this embodiment are all existing technologies. You can refer to the electric wheelchair sold by Langfang Huweishen Technology Co., Ltd., which has a support at the bottom of the seat, which is equivalent to the base 1 in this embodiment. The base 1 in this application can also support the frame, as long as it can support and adjust the first support rod 5 and the second support rod 6. Furthermore, the drive and how to control the movement of the electric wheelchair directly use existing technologies. It can be purchased and directly installed on the base 1 in this embodiment. This embodiment does not change the structure and method of the drive and how to control the movement of the electric wheelchair. It is just a direct use. Therefore, there is no need to elaborate further in this embodiment. It belongs to the existing technology known to those skilled in the art.

[0035] When in use, fold the folding plate 16 and armrest frame upright, then turn on the motor 12 (the motor 12 is electrically connected to the battery on the electric wheelchair body). By moving the seat plate 4 upward, the folding plate 16 and armrest frame are supported. Then flip the foot pedal 21, and the user can sit on the seat plate 4 to use it.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A lightweight, foldable electric wheelchair, comprising an electric wheelchair body and a base (1) disposed on the underside of the electric wheelchair body, wherein wheels (2) are mounted on the four corners of the base (1), characterized in that: The base (1) has a working cavity (3) at its top, and a lifting mechanism is provided inside the working cavity (3). The lifting mechanism has a seat plate (4) at its top. The base (1) has a foldable back plate and a foldable armrest. The seat plate (4) can slide with the back plate and the armrest.

2. The lightweight, foldable electric wheelchair as described in claim 1, characterized in that: The lifting mechanism includes a first support rod (5), a second support rod (6), and a drive assembly. The first support rod (5) is symmetrically arranged in the working cavity (3), and one end of the first support rod (5) is rotatably connected to the inside of the working cavity (3). The second support rods (6) are interlaced and rotatably connected to the first support rod (5). The top ends of the two second support rods (6) are penetrated by a first rotating shaft (7), and the bottom ends of the two second support rods (6) are penetrated by a second rotating shaft (8). A strip groove (9) is provided on the side wall of the working cavity (3), and the two ends of the second rotating shaft (8) are slidably inserted into the two... Inside the first (9) strip groove, the top ends of the two first (5) support rods are connected by a third (10) rotating shaft. The bottom end of the seat plate (4) is symmetrically provided with two strip plates, and the second (11) strip groove is provided on the side of the strip plate near the third (10) rotating shaft. The two ends of the third (10) rotating shaft are respectively slidably inserted into the two second (11) strip grooves. The two ends of the first (7) rotating shaft are rotatably connected to the ends of the two strip plates away from the second (11) strip groove. The drive assembly is installed in the working cavity (3) and is used to push the second (8) rotating shaft along the direction of the first (9) strip groove.

3. The lightweight, foldable electric wheelchair as described in claim 2, characterized in that: The drive assembly includes a motor (12) and a moving block (13). The moving block (13) is slidably disposed on the inner bottom wall of the working cavity (3) along the direction of the first strip groove (9). The moving block (13) is disposed in the middle of the second rotating shaft (8). The output end of the motor (12) is connected to a lead screw (14). The lead screw (14) passes through the moving block (13) and is threadedly engaged with the moving block (13).

4. The lightweight and foldable electric wheelchair as described in claim 3, characterized in that: The back plate includes a fixed plate (15) and a folding plate (16). The fixed plate (15) is fixedly installed on the base (1). The folding plate (16) is rotatably connected to the fixed plate (15). The fixed plate (15) and the folding plate (16) are provided with a limiting groove (17) along the lifting direction of the seat plate (4) on the side of the fixed plate (15) near the seat plate (4). A limiting slider (18) matching the limiting groove (17) is provided on the seat plate (4).

5. A lightweight, foldable electric wheelchair as described in claim 4, characterized in that: The handrail includes a fixed frame (19) and a folding frame (20). The fixed frame (19) is fixedly installed on the top side of the seat plate (4). The folding frame (20) is rotatably connected to the fixed frame (19). The seat plate (4) is provided with a through hole for the fixed frame (19) or the folding frame (20) to slide through.

6. The lightweight, foldable electric wheelchair as described in claim 5, characterized in that: Of the two fixtures (19), one fixture (19) is higher than the other fixture (19).

7. A lightweight, foldable electric wheelchair as described in claim 6, characterized in that: It also includes a foot pedal (21), and a placement groove (22) is provided on the front side of the base (1), and the foot pedal (21) is rotatably connected in the placement groove (22).

8. A lightweight, foldable electric wheelchair as described in claim 7, characterized in that: It also includes a support block (23), which is located below the foot pedal (21) and is fixedly connected to the side wall of the base (1).

9. A lightweight, foldable electric wheelchair as described in claim 8, characterized in that: A folding rod (24) is rotatably mounted on the side of the seat plate (4) near the foot pedal (21), and a plug (25) is provided at the bottom end of the folding rod (24).

10. A lightweight, foldable electric wheelchair as described in claim 9, characterized in that: The foot pedal (21) is provided with a socket (26) that is compatible with the plug (25).

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