Backrest structure for electric wheelchair

Abstract

The utility model discloses a backrest structure for an electric wheelchair, which comprises a fixed seat, an angle adjuster fixedly connected to the upper end of the fixed seat, and a mounting seat rotatably connected to the angle adjuster; the lower end of the U-shaped mounting frame is fixedly connected with the upper end of the mounting seat, a sliding groove is formed in the front end of the U-shaped mounting frame, clamping plates are slidably connected to the sliding groove through limiting rods, the clamping plates are symmetrically distributed in the U-shaped mounting frame, clamping grooves are formed in the front ends of the clamping plates, and threaded rods are in threaded connection with the left end and the right end of the U-shaped mounting frame. A detachable mechanism is composed of the U-shaped mounting frame, the sliding grooves, the limiting rods, the clamping plates, the screw rods, the clamping grooves, the protruding blocks, the backrest plate and the back cushion, the backrest can be rapidly disassembled and assembled, and replacement, cleaning and overhauling of the backrest are facilitated; the angle adjusting mechanism is composed of the fixing base, the angle adjuster, the mounting base and the U-shaped mounting frame, the inclination angle of the backrest can be adjusted to adapt to different users, and the using comfort of the backrest structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric wheelchairs, in particular to a backrest structure for an electric wheelchair. Background Art

[0002] Existing electric wheelchair backrest structures have complex mounting structures and are difficult to disassemble and assemble, hindering backrest replacement and maintenance. The backrest's fixed angle makes it difficult to adapt to varying user needs, and the backrest structure lacks flexibility. A Chinese patent application, CN201721292648.6, discloses a "new electric wheelchair backrest" comprising a support frame and a push rod. The support frame is equipped with a rear drive wheel and an anti-roll wheel at its base. The utility model relates to a new electric wheelchair backrest with an angle-adjustable lower arc clip fixed to the support frame and an angle-adjustable upper arc clip fixed to the push rod. An angle-adjustable push pin adjusts the relative position of the lower and upper arc clips, thereby adjusting the angle of the push rod relative to the support frame. Users can adjust the angle of the push rod and backrest according to their needs, providing convenience for electric wheelchair users. Furthermore, the new electric wheelchair backrest structure is rationally designed, safe, convenient, and quick to use, making it suitable for widespread use. However, the backrest structure is difficult to disassemble and assemble, hindering replacement and maintenance. The fixed angle of the backrest makes it difficult to adapt to varying user needs, and the backrest structure lacks flexibility. Utility Model Content

[0003] The purpose of the present utility model is to solve at least one of the technical problems existing in the prior art and to provide a backrest structure for an electric wheelchair. A detachable mechanism is formed by a U-shaped mounting frame, a slide groove, a limit rod, a clamping plate, a screw, a clamping groove, a protrusion, and a backrest plate reliable pad, so that the backrest can be quickly disassembled and assembled, which is convenient for replacing, cleaning and repairing the backrest. An angle adjustment mechanism is formed by a fixing seat, an angle adjuster, a mounting seat and a U-shaped mounting frame, so that the inclination angle of the backrest can be adjusted to suit different users, thereby improving the comfort of use of the backrest structure.

[0004] The utility model also provides a backrest structure for an electric wheelchair as described above, comprising: a fixed seat, the upper end of the fixed seat is fixedly connected to an adjuster, and the adjuster is rotatably connected to the mounting seat; a U-shaped mounting frame, the lower end of the U-shaped mounting frame is fixedly connected to the upper end of the mounting seat, the front end of the U-shaped mounting frame is provided with a slide groove, the slide groove is slidably connected to a clamping plate through a limit rod, the clamping plates are symmetrically distributed inside the U-shaped mounting frame, the front end of the clamping plate is provided with a clamping groove, and the left and right ends of the U-shaped mounting frame are threadedly connected to a threaded rod; a protrusion, the left and right ends of the protrusion are clamped with the clamping groove, the front end of the protrusion is fixedly connected to the backrest plate, and the front end of the backrest plate is fixedly connected to the cushion.

[0005] According to the utility model, a backrest structure for an electric wheelchair is provided. A mounting plate is fixedly connected to the lower end of the fixing seat, facilitating the installation and fixation of the backrest structure. The mounting plate is provided with mounting holes to facilitate the stable installation of the backrest structure. The mounting holes are located at the four corners of the mounting plate, facilitating the stable installation of the backrest structure.

[0006] According to the electric wheelchair backrest structure of the present invention, a fixing plate is fixedly connected to the front end of the U-shaped mounting frame to improve the stability of the threaded rod. The fixing plates are symmetrically distributed within the U-shaped mounting frame, facilitating the stable installation of the threaded rod. The fixing plates are threadedly connected to the threaded rod, facilitating the stable installation of the threaded rod.

[0007] According to the electric wheelchair backrest structure of the present invention, the end of the threaded rod close to the clamping plate abuts against the rear end of the clamping plate, which is conducive to stable compression of the clamping plate.

[0008] According to the electric wheelchair backrest structure described in the utility model, the end of the threaded rod away from the clamping plate is provided with an adjustment handle to facilitate adjustment of the threaded rod and improve the convenience of use of the threaded rod. The end of the threaded rod close to the clamping plate is provided with a cylindrical block to facilitate stable compression of the clamping plate.

[0009] According to the electric wheelchair backrest structure of the present invention, a circular groove is provided at the rear end of the clamping plate to prevent displacement of the threaded rod and facilitate stable compression of the threaded rod. The circular groove is sleeved with the cylindrical block, which facilitates stable compression of the threaded rod.

[0010] According to the electric wheelchair backrest structure of the present invention, the rear end of the protrusion abuts against the rear inner wall of the mounting frame, making the structure compact and stable. The side ends of the protrusion abut against the side inner walls of the clamping groove, making the structure compact and stable.

[0011] According to the backrest structure for an electric wheelchair described in the utility model, the rear end of the backrest plate abuts against the front end of the mounting frame, making the structure compact and stable. Beneficial effects

[0012] 1. Compared with the existing technology, this electric wheelchair backrest structure has a detachable mechanism composed of a U-shaped mounting frame, a slide groove, a limit rod, a clamping plate, a screw, a clamping groove, a protrusion, and a backrest plate reliable pad. The backrest can be quickly disassembled and assembled, which is convenient for replacement, cleaning and maintenance of the backrest;

[0013] 2. Compared with the existing technology, the backrest structure of this electric wheelchair has an angle adjustment mechanism composed of a fixed seat, an adjuster, a mounting seat and a U-shaped mounting frame, which can adjust the inclination angle of the backrest to adapt to different users, and the comfort of use of the backrest structure is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0015] Figure 1 This is a schematic diagram of the exploded structure of a backrest structure for an electric wheelchair according to the present utility model;

[0016] Figure 2 This is a schematic structural diagram of a backrest structure for an electric wheelchair according to the present utility model;

[0017] Figure 3 This is a schematic diagram of the transverse cross-sectional structure of a backrest structure for an electric wheelchair according to the present utility model;

[0018] Figure 4 The utility model is a schematic diagram of the longitudinal cross-section structure of a backrest structure for an electric wheelchair.

[0019] Legend:

[0020] 1. U-shaped mounting frame; 2. Clamping plate; 3. Backrest plate; 4. Cushion; 5. Mounting hole; 6. Mounting plate; 7. Fixed seat; 8. Recliner; 9. Mounting seat; 10. Adjusting handle; 11. Threaded rod; 12. Cylindrical block; 13. Fixed plate; 14. Clamping plate; 15. Slide groove; 16. Limit rod; 17. Bump; 18. Circular groove. DETAILED DESCRIPTION

[0021] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0022] Reference Figure 1-4 The embodiment of the present utility model provides a backrest structure for an electric wheelchair, which includes: a fixing seat 7, the upper end of the fixing seat 7 is fixedly connected to a recliner 8, which adjusts the angle of the backrest to adapt to the use requirements of different users, the recliner 8 is rotatably connected to a mounting seat 9, and a U-shaped mounting frame is installed. The lower end of the fixing seat 7 is fixedly connected to a mounting plate 6 for mounting and fixing the backrest structure. The mounting plate 6 is provided with mounting holes 5 for stably mounting the backrest structure. The mounting holes 5 are located at the four corners of the mounting plate 6 to form a stable mounting layout.

[0023] The U-shaped mounting frame, the lower end of the U-shaped mounting frame 1 is fixedly connected to the upper end of the mounting seat 9 to form a mounting structure of the U-shaped mounting frame, and a slide groove 15 is provided at the front end of the U-shaped mounting frame 1 to enable the limit rod to slide in the U-shaped mounting frame, and the slide groove 15 is slidably connected to the clamping plate 14 through the limit rod 16 to clamp the protrusion of the backrest, and the clamping plates 14 are symmetrically distributed inside the U-shaped mounting frame 1 to form a clamping layout, and a clamping groove 2 is provided at the front end of the clamping plate 14 to clamp and limit the protrusion, and the left and right ends of the U-shaped mounting frame 1 are threadedly connected with threaded rods 11, which are tightened to compress the clamping plates, and the end of the threaded rod 11 close to the clamping plate 14 and the rear end of the clamping plate 14 They abut against each other to form a tightening structure. An adjusting handle 10 is provided at one end of the threaded rod 11 away from the clamping plate 14 to adjust the threaded rod. A cylindrical block 12 is provided at one end of the threaded rod 11 close to the clamping plate 14 to press the clamping plate. A circular groove 18 is provided at the rear end of the clamping plate 14 to limit the cylindrical block to prevent the deviation of the threaded rod. The circular groove 18 is sleeved with the cylindrical block 12 to form a limiting structure. A fixing plate 13 is fixedly connected to the front end of the U-shaped mounting frame 1 to install the threaded rod. The fixing plates 13 are symmetrically distributed inside the U-shaped mounting frame 1 to form an installation layout of the threaded rod. The fixing plate 13 is threadedly connected to the threaded rod 11 to form an installation structure of the threaded rod.

[0024] The protrusion 17, the left and right ends of the protrusion 17 are clamped with the clamping groove 2 to form a compression clamping structure, which can quickly disassemble and assemble the backrest. The rear end of the protrusion 17 abuts against the rear inner wall of the mounting frame 1 to form a compact and stable structure. The side end of the protrusion 17 abuts against the side inner wall of the clamping groove 2 to form a compact and stable structure. The front end of the protrusion 17 is fixedly connected to the backrest board 3, and the cushion is installed. The rear end of the backrest board 3 abuts against the front end of the mounting frame 1 to form a compact and stable structure. The front end of the backrest board 3 is fixedly connected to the cushion 4 for leaning.

[0025] Working principle: When using the backrest structure for an electric wheelchair, the angle of the backrest structure can be adjusted by the angle adjuster 8 to adapt to different usage requirements; adjusting the threaded rod 11 can release the clamping plate 14 from clamping the protrusion 17 of the backrest plate 3, and the backrest structure can be quickly disassembled, making it convenient to replace, clean and repair the backrest structure. Similarly, the backrest structure can be quickly installed by adjusting the threaded rod 11.

[0026] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A backrest structure for an electric wheelchair, characterized in that: include: A fixed seat (7), wherein the upper end of the fixed seat (7) is fixedly connected to a recliner (8), and the recliner (8) is rotatably connected to a mounting seat (9); A U-shaped mounting frame (1), wherein the lower end of the U-shaped mounting frame (1) is fixedly connected to the upper end of the mounting seat (9), a slide groove (15) is provided at the front end of the U-shaped mounting frame (1), and the slide groove (15) is slidably connected to a clamping plate (14) through a limit rod (16), and the clamping plate (14) is symmetrically distributed inside the U-shaped mounting frame (1), and a clamping groove (2) is provided at the front end of the clamping plate (14), and the left and right ends of the U-shaped mounting frame (1) are threadedly connected to threaded rods (11); A protrusion (17), the left and right ends of the protrusion (17) are clamped with the clamping groove (2), the front end of the protrusion (17) is fixedly connected to the backrest plate (3), and the front end of the backrest plate (3) is fixedly connected to the cushion (4).

2. The electric wheelchair backrest structure according to claim 1, characterized in that: The lower end of the fixing seat (7) is fixedly connected to a mounting plate (6), and mounting holes (5) are provided in the mounting plate (6). The mounting holes (5) are located at the four corners of the mounting plate (6).

3. The backrest structure for an electric wheelchair according to claim 1, characterized in that: A fixing plate (13) is fixedly connected to the front end of the U-shaped installation frame (1), the fixing plates (13) are symmetrically distributed inside the U-shaped installation frame (1), and the fixing plates (13) are threadedly connected to the threaded rod (11).

4. The electric wheelchair backrest structure according to claim 1, characterized in that: One end of the threaded rod (11) close to the clamping plate (14) abuts against the rear end of the clamping plate (14).

5. The electric wheelchair backrest structure according to claim 1, characterized in that: An adjusting handle (10) is provided at one end of the threaded rod (11) away from the clamping plate (14), and a cylindrical block (12) is provided at one end of the threaded rod (11) close to the clamping plate (14).

6. The electric wheelchair backrest structure according to claim 1, characterized in that: A circular groove (18) is provided at the rear end of the clamping plate (14), and the circular groove (18) is sleeved with the cylindrical block (12).

7. The electric wheelchair backrest structure according to claim 1, characterized in that: The rear end of the protrusion (17) abuts against the rear inner wall of the installation frame (1), and the side end of the protrusion (17) abuts against the side inner wall of the clamping groove (2).

8. The electric wheelchair backrest structure according to claim 1, characterized in that: The rear end of the backrest plate (3) abuts against the front end of the mounting frame (1).

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