Magnetic quick-release backrest for electric wheelchair

Abstract

The utility model provides a kind of quick-release type electric wheelchair backrest of magnetic attraction, including backrest main body, the both sides of backrest main body are connected with connecting pipe, the lower end of connecting pipe is equipped with two fixed bases, two fixed bases lower end are sequentially provided with adjusting sleeve, magnetic attraction column and magnetic base, two magnetic bases are sleeved on chassis support, adjusting sleeve is embedded in fixed base, and telescopic spring is equipped between the two, spring column is embedded in adjusting sleeve, spring ball is embedded in magnetic attraction column, spring column and the spring ball are mutually contacted and connected, and one end of spring ball is embedded in adjusting sleeve.The utility model has the beneficial effects: by adopting the mode that magnetic attraction and mechanical structure are combined, the characteristics of tool-free installation and removal, convenient operation are realized;Through the clamping structure between adjusting sleeve and fixed base, magnetic base, and the magnetic attraction of magnetic attraction column and magnetic base, the overall structure of backrest is stable and reliable.

Description

Technical Field

[0001] This utility model mainly relates to the field of electric wheelchair technology, specifically to a magnetic quick-release electric wheelchair backrest. Background Technology

[0002] With the deepening of population aging and the increase in the number of people with disabilities, the demand for electric wheelchairs as an important means of transportation is growing. However, the backrest of traditional electric wheelchairs has many inconveniences in terms of installation, disassembly, angle adjustment, and replacement of the backrest body.

[0003] Traditional electric wheelchair backrests are mostly fixed with fasteners such as bolts and nuts, making installation and disassembly cumbersome and requiring specific tools. This is difficult for users with mobility impairments and is time-consuming and energy-intensive. In terms of angle adjustment, traditional backrests are usually complicated or have a limited range of adjustment, making it difficult to meet the diverse comfort needs of users. The backrest body of traditional backrests is often fixedly connected to the backrest frame, making replacement difficult. When the backrest body is dirty or damaged, cleaning and repair costs are high, and it cannot be replaced according to the user's personalized needs.

[0004] It should be noted that the above content falls within the scope of the inventor's technical knowledge. Due to the vast and complex nature of the technical content in this field, the above content of this application does not necessarily constitute prior art. Utility Model Content

[0005] 1. The technical problem to be solved by the utility model: This invention provides a magnetic quick-release electric wheelchair backrest to solve the technical problems existing in the background art.

[0006] 2. Technical Solution: To achieve the above objectives, the technical solution provided by this utility model is as follows: a magnetic quick-release electric wheelchair backrest, comprising a backrest body, with connecting pipes connected to both sides of the backrest body, and two fixing seats at the lower end of the connecting pipes. An adjusting sleeve, a magnetic column, and a magnetic base are sequentially arranged at the lower ends of the two fixing seats. The two magnetic bases are sleeved on a chassis support. The adjusting sleeve is embedded within the fixing seats, and a telescopic spring is provided between them. A spring column is embedded within the adjusting sleeve, and a spring ball is embedded within the magnetic column. The spring column and the spring ball are in contact with each other, and one end of the spring ball is embedded within the adjusting sleeve.

[0007] Furthermore, the upper end of the connecting pipe is connected to the handrail, and the lower end of the connecting pipe is provided with a threaded hole that matches the fixed seat.

[0008] Furthermore, the fixing seat has a locking groove and a limiting groove, and a fixing bolt is welded to the upper end of the fixing seat.

[0009] Furthermore, the outer wall of the adjusting sleeve is provided with a first locking block and a second locking block, the first locking block being matched with the engaging groove and the limiting groove respectively.

[0010] Furthermore, the magnetic base is provided with a docking groove and an adjustment groove, and the adjustment groove is provided with an insertion groove. The docking groove and the adjustment groove are connected, and the second locking block is matched with the docking groove and the adjustment groove.

[0011] Furthermore, the magnetic column is a magnet, the magnetic base is a metal part that attracts the magnet, and the lower end of the magnetic column is inserted into the insertion slot.

[0012] Furthermore, the backrest body is a soft pad, which is fitted onto the connecting tube.

[0013] Furthermore, the upper end of the telescopic spring is embedded in the fixed base via a disc, and the lower end is fixedly connected to the adjusting sleeve.

[0014] 3. Beneficial effects: Compared with the prior art, the technical solution provided by this utility model has the following advantages: By combining magnetic attraction with mechanical structure, it achieves tool-free installation and disassembly, making it easy to operate; By adjusting the snap-fit ​​structure between the sleeve and the fixed base and the magnetic base, as well as the magnetic attraction between the magnetic column and the magnetic base, the overall structure of the backrest is made stable and reliable, providing solid support for the user and ensuring that it will not easily shake or loosen during use, thus guaranteeing the user's safety. The backrest angle is flexibly adjustable to suit various scenarios. The backrest body is easy to replace, making cleaning and maintenance convenient, and it can also meet personalized needs.

[0015] It should be noted that the structures not described in this utility model are the same as or can be implemented using existing technology, and will not be elaborated here, as they do not involve the design points and improvement directions of this utility model. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an exploded view of the overall structure of this utility model; Figure 3 This is a partial structural schematic diagram of the present invention; Figure 4 This is a partial structural cross-sectional view of the present invention; Figure 5 This is another partial structural cross-sectional view of the present invention.

[0017] Figure label: 1. Backrest main body; 2. Connecting pipe; 3. Fixing base; 301. Engaging groove; 302. Limiting groove; 303. Fixing bolt; 4. Adjusting sleeve; 401. Spring column; 402. Locking block one; 403. Locking block two; 5. Magnetic column; 501. Spring ball; 6. Magnetic base; 601. Connecting groove; 602. Adjusting groove; 603. Insertion groove; 7. Chassis bracket; 8. Telescopic spring; 9. Armrest. Detailed Implementation

[0018] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," "provided with," and "located in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] See attached document Figure 1-5 A magnetic quick-release electric wheelchair backrest includes a backrest body 1. Connecting pipes 2 are connected to both sides of the backrest body 1. Two fixing seats 3 are provided at the lower end of the connecting pipes 2. Adjusting sleeves 4, magnetic columns 5 and magnetic seats 6 are arranged sequentially at the lower end of the two fixing seats 3. The two magnetic seats 6 are sleeved on the chassis support 7. The adjusting sleeve 4 is embedded in the fixing seat 3 and a telescopic spring 8 is provided between the two. A spring column 401 is embedded in the adjusting sleeve 4 and a spring ball 501 is embedded in the magnetic column 5. The spring column 401 and the spring ball 501 are connected to each other and one end of the spring ball 501 is embedded in the adjusting sleeve 4.

[0023] The backrest body 1 is a soft cushion made of soft and comfortable material, which can provide users with good support and comfort. It is fitted onto the connecting tube 2, making it convenient for users to change according to their needs. For example, users can change to backrest bodies of different materials and thicknesses according to their own preferences or physical conditions.

[0024] There are two connecting tubes 2, which are connected to the two sides of the backrest body 1 respectively. The upper end of the connecting tube 2 is connected to the armrest 9. The armrest 9 provides a convenient place for the user to hold and increases the stability during use. The lower end of the connecting tube 2 is provided with a threaded hole. This threaded hole matches the fixing bolt 303 welded to the upper end of the fixing seat 3. Through the threaded connection, the fixing seat 3 is firmly installed at the lower end of the connecting tube 2.

[0025] The fixed base 3 has a locking groove 301 and a limiting groove 302. These two grooves play a key limiting role in the installation and adjustment process. The lower end of the fixed base 3 is provided with an adjusting sleeve 4, a magnetic column 5 and a magnetic seat 6 in sequence.

[0026] The adjusting sleeve 4 is embedded in the fixed base 3, and a telescopic spring 8 is provided between the two. The upper end of the telescopic spring 8 is embedded in the fixed base 3 through a disc, and the lower end is fixedly connected to the adjusting sleeve 4. When the adjusting sleeve 4 is pulled down, the telescopic spring 8 is stretched and stores elastic potential energy; when the adjusting sleeve 4 is released, the elastic potential energy of the telescopic spring 8 is released, causing the adjusting sleeve 4 to tend to return to its original position.

[0027] The outer wall of the adjusting sleeve 4 is provided with a first locking block 402 and a second locking block 403. The first locking block 402 is matched with the locking groove 301 and the limiting groove 302 respectively. The second locking block 403 is matched with the docking groove 601 and the adjusting groove 602 on the magnetic base 6. The adjusting sleeve 4 is embedded with a spring column 401. The spring column 401 and the spring ball 501 embedded in the magnetic column 5 are in mutual contact and connection, and one end of the spring ball 501 is embedded in the adjusting sleeve 4.

[0028] The magnetic column 5 is a magnet, and the magnetic base 6 is a metal part that attracts the magnet. This design utilizes magnetic force to achieve quick connection and disassembly. The lower end of the magnetic column 5 is inserted into the insertion slot 603 on the magnetic base 6, so that the magnetic column 5 and the magnetic base 6 are firmly connected.

[0029] The magnetic seat 6 is mounted on the chassis frame 7, which is part of the electric wheelchair. The connection between the magnetic seat 6 and the chassis frame 7 allows for angle adjustment according to usage needs. Users can adjust the backrest angle according to their own sitting posture and comfort, increasing the flexibility and comfort of use.

[0030] The specific installation process is as follows: First, insert the lower end of the magnetic column 5 into the insertion slot 603 on the magnetic base 6. At this time, the magnetic column 5 and the magnetic base 6 are initially connected by magnetic force. Then, press the spring column 401 on the adjusting sleeve 4 inward with your finger. The spring column 401 moves inward, pushing the spring ball 501 on the magnetic column 5 inward, so that the spring ball 501 is no longer stuck in the adjusting sleeve 4, thereby releasing the connection between the magnetic column 5 and the adjusting sleeve 4. While keeping the spring column 401 pressed, pull the adjusting sleeve 4 downward. During the pulling process... The telescopic spring 8 is stretched; when the adjusting sleeve 4 is pulled to a certain position, the first locking block 402 enters the limiting groove 302 from the engaging groove 301, and the second locking block 403 enters the adjusting groove 602 from the docking groove 601; then the adjusting sleeve 4 is rotated, and the telescopic spring 8 will rotate together with the adjusting sleeve 4. The purpose of rotating the adjusting sleeve 4 is to achieve upper and lower locking. The upper locking block 402 engages with the limiting groove 302 of the fixed seat 3 for limiting, and the lower locking block 403 engages with the adjusting groove 602 of the magnetic seat 6 for limiting, thus completing the entire installation process.

[0031] During use, the angle between the chassis support 7 and the magnetic base 6 can be adjusted according to usage needs. Users can flexibly adjust the tilt of the backrest according to their own needs to obtain the best riding experience. The backrest body 1, as a soft cushion, can also be replaced according to the user's needs. For example, when the backrest body 1 is dirty or damaged, a new backrest body can be easily replaced.

[0032] In summary, the magnetic quick-release electric wheelchair backrest provided by this technical solution is easy and quick to install and remove, and can be completed quickly through magnetic attraction and mechanical operation without the need for complicated tools; secondly, the backrest angle is adjustable, increasing the flexibility and comfort of use, and the backrest body is replaceable, making it convenient for cleaning and maintenance, while also meeting the personalized needs of different users.

[0033] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A magnetic quick-release electric wheelchair backrest, characterized in that: The backrest body (1) is connected to two connecting pipes (2) on both sides. The lower end of the connecting pipe (2) is provided with two fixed seats (3). The lower ends of the two fixed seats (3) are provided with an adjusting sleeve (4), a magnetic column (5) and a magnetic seat (6) in sequence. The two magnetic seats (6) are sleeved on the chassis support (7). The adjusting sleeve (4) is embedded in the fixed seat (3) and a telescopic spring (8) is provided between them. The adjusting sleeve (4) is embedded with a spring column (401). The magnetic column (5) is embedded with a spring ball (501). The spring column (401) and the spring ball (501) are connected to each other and one end of the spring ball (501) is embedded in the adjusting sleeve (4).

2. The magnetic quick-release electric wheelchair backrest according to claim 1, characterized in that: The upper end of the connecting pipe (2) is connected to the handrail (9), and the lower end of the connecting pipe (2) is provided with a threaded hole that matches the fixed seat (3).

3. The magnetic quick-release electric wheelchair backrest according to claim 1, characterized in that: The fixing seat (3) has a locking groove (301) and a limiting groove (302) inside, and a fixing bolt (303) is welded to the upper end of the fixing seat (3).

4. The magnetic quick-release electric wheelchair backrest according to claim 3, characterized in that: The outer wall of the adjusting sleeve (4) is provided with a first locking block (402) and a second locking block (403). The first locking block (402) is matched with the locking groove (301) and the limiting groove (302) respectively.

5. The magnetic quick-release electric wheelchair backrest according to claim 4, characterized in that: The magnetic base (6) is provided with a docking groove (601) and an adjustment groove (602). The adjustment groove (602) is provided with a plug-in groove (603). The docking groove (601) and the adjustment groove (602) are connected. The second card block (403) is matched with the docking groove (601) and the adjustment groove (602).

6. The magnetic quick-release electric wheelchair backrest according to claim 5, characterized in that: The magnetic column (5) is a magnet, and the magnetic base (6) is a metal part that attracts the magnet. The lower end of the magnetic column (5) is inserted into the insertion slot (603).

7. The magnetic quick-release electric wheelchair backrest according to claim 1, characterized in that: The backrest body (1) is a soft pad, which is fitted onto the connecting tube (2).

8. The magnetic quick-release electric wheelchair backrest according to claim 1, characterized in that: The upper end of the telescopic spring (8) is embedded in the fixed base (3) through a disc, and the lower end is fixedly connected to the adjusting sleeve (4).

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