Backrest assembly of electric wheelchair

Abstract

The utility model discloses an electric wheelchair backrest assembly which comprises a wheelchair frame, and the top end of the wheelchair frame is fixedly connected with a backrest frame. A backrest assembly is arranged in the backrest frame and comprises a breathable plate, and the two sides of the breathable plate are connected with the inner wall of the backrest frame respectively; the back cushion assembly is arranged on the front surface of the breathable plate; the fixed plate is connected to the back surface of the permeable plate; and the positioning assembly is arranged in the fixing plate. The arrangement mode that the breathable plate, the back cushion assembly, the fixing plate and the positioning assembly are matched is utilized, fixing of the back cushion assembly can be relieved at any time through the positioning assembly, and therefore the back of the electric wheelchair can be replaced at any time according to weather and other conditions, and great convenience can be brought to users; the chair has the advantages of convenience in use, simplicity in operation, recyclability and the like, and diseases of a user caused by incapability of replacing the backrest or other invariant conditions are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field related to backrests, and in particular to a backrest component for an electric wheelchair. Background Art

[0002] At present, the existing electric wheelchairs have a high degree of intelligence, which brings great convenience to patients in need or elderly people with limited mobility. It not only brings great convenience to patients in need, but also greatly reduces the pressure on a family.

[0003] The backrests of electric wheelchairs currently on the market are generally made of canvas or leather, and are integrally formed with the seat cushion. Patients cannot replace the backrests of electric wheelchairs at any time according to weather conditions. If it is summer, the canvas or leather backrests will cause trouble to patients, especially when the temperature is high. When the patient leans against the backrest, the air cannot circulate, and the sweat produced by the human body cannot evaporate quickly, which can easily cause skin diseases and other conditions, which is quite inconvenient. Utility Model Content

[0004] The purpose of the utility model is to provide an electric wheelchair backrest assembly to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electric wheelchair backrest assembly, comprising a wheelchair frame, the top end of which is fixedly connected to a backrest frame;

[0006] A backrest assembly is arranged inside the backrest frame, and the backrest assembly includes:

[0007] A breathable plate, both sides of which are fixedly connected to the inner wall of the backrest frame, and the breathable plate is provided with a plurality of breathable holes at equal intervals for use in weather with relatively high temperature;

[0008] A cushion assembly, which is arranged on the front of the air-permeable plate and is used in weather with relatively low temperature. The cushion assembly comprises:

[0009] A cushion plate, wherein the cushion plate cooperates with the air-permeable plate;

[0010] Connecting rods, a plurality of connecting rods are fixedly connected to the back of the cushion plate at equal intervals, the connecting rods are connected to the air holes in a sliding manner, a plurality of through holes are opened at equal intervals in the middle of the fixing plate, and the connecting rods are connected to the inner cavities of the through holes in a sliding manner;

[0011] A fixing plate, the fixing plate is fixedly connected to the back side of the air-permeable plate, and the cross section of the fixing plate is C-shaped;

[0012] A positioning assembly is disposed inside the fixing plate and is used to define the position of the cushion assembly. The positioning assembly includes:

[0013] A positioning rod, wherein a plurality of positioning grooves are equidistantly formed at the top of the fixing plate, a positioning hole is formed at the top of the connecting rod, one end of the positioning rod is slidably inserted and connected with the inner cavity of the positioning groove, and the other end of the positioning rod is slidably inserted and connected with the inner cavity of the positioning hole;

[0014] Slide blocks, wherein a plurality of the slide blocks are respectively fixedly connected to the two sides of the positioning rod, and slide blocks are provided on both sides of the inner wall of the positioning groove, and the slide blocks are slidably interlaced with the inner cavity of the slide blocks;

[0015] A compression spring is located inside the slide slot.

[0016] Preferably, one end of the compression spring is fixedly connected to the slider, and the other end of the compression spring is fixedly connected to the inner wall of the slide groove.

[0017] Preferably, the top ends of the plurality of positioning rods are fixedly connected with a synchronization plate, and the outer wall of the synchronization plate is provided with a groove.

[0018] Preferably, the cross-sections of the cushion plate and the air-permeable plate are both arc-shaped, and the cushion plate is made of heat-insulating material.

[0019] Technical effects and advantages of the utility model:

[0020] The utility model utilizes a configuration mode in which a breathable plate, a cushion assembly, a fixing plate and a positioning assembly are matched, and the cushion assembly can be released from fixation at any time through the positioning assembly, so that the breathable plate or the cushion assembly can be selected at any time according to weather conditions, and the backrest of the electric wheelchair can be flexibly replaced, which can bring great convenience to people using the wheelchair and prevent the occurrence of diseases or other changes to the user due to the inability to replace the backrest. The utility model has the advantages of convenient use, simple operation, and recyclable use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0022] Figure 2 This is a schematic diagram of the internal structure of the backrest assembly of the utility model when viewed from above.

[0023] Figure 3 It is a schematic diagram of the internal structure of the back side of the fixing plate of the utility model.

[0024] In the figure: 1, wheelchair frame; 2, backrest frame; 3, backrest assembly; 31, breathable plate; 32, cushion assembly; 321, cushion plate; 322, connecting rod; 33, fixing plate; 34, positioning assembly; 341, positioning rod; 342, slider; 343, compression spring; 4, synchronization plate. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The utility model provides Figure 1-3 An electric wheelchair backrest assembly shown includes a wheelchair frame 1, the top of which is fixedly connected to a backrest frame 2;

[0027] Furthermore, a backrest assembly 3 is provided inside the backrest frame 2, and the backrest assembly 3 includes: a breathable plate 31, a cushion assembly 32, a fixing plate 33 and a positioning assembly 34. Both sides of the breathable plate 31 are fixedly connected to the inner wall of the backrest frame 2 respectively. A plurality of breathable holes are equidistantly provided on the breathable plate 31, which are used in weather with higher temperatures. The breathable holes can allow air to flow freely on the backrest, thereby increasing comfort. When the human body sweats, the ventilation holes help the evaporation of sweat, keep the backrest dry, reduce moisture and discomfort, and in a hot environment, the ventilation holes help improve the heat dissipation effect of the backrest, reduce the temperature of the backrest surface, make the backrest cooler, and improve the user's comfort. The ventilation holes on the backrest can be designed according to the human body curve to provide more ergonomic support, reduce the pressure on the back, shoulders and waist, and relieve fatigue; the cushion assembly 32 is arranged on the front of the breathable plate 31 for use in weather with lower temperatures; the fixing plate 33, the fixing plate 33 is fixedly connected to the back of the breathable plate 31, and the cross-section of the fixing plate 33 is C-shaped. The shaped fixing plate 33 can ensure that the air holes are not blocked and can also position the cushion assembly 32; the positioning assembly 34 is arranged inside the fixing plate 33, and is used to limit the position of the cushion assembly 32. The cushion assembly 32 can be released at any time through the positioning assembly 34, so that the air permeable plate 31 or the cushion assembly 32 can be used at any time according to weather conditions. The back of the electric wheelchair can be flexibly replaced, which can bring great convenience to the people using it and prevent the user from getting sick or other changes due to the inability to replace the backrest. It has the advantages of convenient use, simple operation, and recyclable use.

[0028] Specifically, the cushion assembly 32 includes: a cushion plate 321 and a connecting rod 322. The cushion plate 321 cooperates with the breathable plate 31. The cross-sections of the cushion plate 321 and the breathable plate 31 are both arc-shaped. The cushion plate 321 is made of thermal insulation material. The cushion plate 321 can be made of materials such as polyurethane foam, memory foam, latex foam, down and space cotton, which has a good thermal insulation effect, making it more comfortable to use in cold weather; a plurality of connecting rods 322 are equidistantly fixedly connected to the back of the cushion plate 321, and the connecting rods 322 are slidably and interlacedly connected with the breathable holes. A plurality of through holes are equidistantly opened in the middle of the fixed plate 33, and the connecting rods 322 are slidably and interlacedly connected with the inner cavity of the through holes. The connecting rods 322 pass through the breathable holes and interlace with the through holes, so that the connecting rods 322 can be positioned by the positioning assembly 34, thereby realizing the installation of the cushion plate 321.

[0029] Specifically, the positioning assembly 34 includes: a positioning rod 341, a slider 342 and a compression spring 343. The top of the fixed plate 33 is equidistantly provided with a plurality of positioning grooves, the top of the connecting rod 322 is provided with a positioning hole, one end of the positioning rod 341 is slidably inserted and connected with the inner cavity of the positioning groove, and the other end of the positioning rod 341 is slidably inserted and connected with the inner cavity of the positioning hole; a plurality of sliders 342 are respectively fixedly connected to both sides of the positioning rod 341, and both sides of the inner wall of the positioning groove are provided with sliding grooves, and the sliders 342 are slidably inserted and connected with the inner cavity of the sliding groove, and the sliders 342 play a role. The limiting effect on the positioning rod 341 makes the positioning rod 341 only able to slide along the direction of the slide groove; the compression spring 343 is located inside the slide groove, one end of the compression spring 343 is fixedly connected to the slider 342, and the other end of the compression spring 343 is fixedly connected to the inner wall of the slide groove. The compression spring 343 is always in a compressed state, so that a stable elastic force can be provided to the positioning rod 341 through the slider 342, so that the positioning rod 341 can be stably downward, so that the connecting rod 322 inserted into the through hole can be clamped and positioned.

[0030] Furthermore, the top ends of the multiple positioning rods 341 are fixedly connected to a synchronization plate 4, and a pull groove is provided on the outer wall of the synchronization plate 4. By inserting a finger into the pull groove, the synchronization plate 4 can be pulled upward, so that the multiple positioning rods 341 can be pulled at the same time by the synchronization plate 4, thereby releasing the positioning of the multiple connecting rods 322 at the same time, and the cushion plate 321 can be removed from the breathable plate 31, so that the disassembly can be completed quickly, which is convenient for use when the temperature is high.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric wheelchair backrest assembly, comprising: A wheelchair frame (1), the top end of which is fixedly connected to a backrest frame (2); The invention is characterized in that a backrest assembly (3) is arranged inside the backrest frame (2), and the backrest assembly (3) comprises: A ventilation plate (31), the two sides of which are respectively fixedly connected to the inner wall of the backrest frame (2), and the ventilation plate (31) is provided with a plurality of ventilation holes at equal intervals for use in weather with relatively high temperature; A cushion assembly (32), which is arranged on the front side of the air permeable plate (31) and is used in weather with relatively low temperature. The cushion assembly (32) comprises: A cushion plate (321), wherein the cushion plate (321) cooperates with the air-permeable plate (31); A connecting rod (322), wherein a plurality of the connecting rods (322) are fixedly connected to the back of the cushion plate (321) at equal intervals, wherein the connecting rods (322) are slidably interpenetratingly connected to the air vents; a fixing plate (33), wherein the fixing plate (33) is fixedly connected to the back of the air vent plate (31), wherein the cross section of the fixing plate (33) is C-shaped; a plurality of through holes are equidistantly provided in the middle of the fixing plate (33), wherein the connecting rods (322) are slidably interpenetratingly connected to the inner cavities of the through holes; A positioning assembly (34), the positioning assembly (34) being arranged inside the fixing plate (33) and used for defining the position of the cushion assembly (32), the positioning assembly (34) comprising: A positioning rod (341), a plurality of positioning grooves are equidistantly formed at the top of the fixing plate (33), a positioning hole is formed at the top of the connecting rod (322), one end of the positioning rod (341) is slidably connected to the inner cavity of the positioning groove, and the other end of the positioning rod (341) is slidably connected to the inner cavity of the positioning hole; Slide blocks (342), wherein a plurality of the slide blocks (342) are respectively fixedly connected to two sides of the positioning rod (341), and slide blocks are provided on both sides of the inner wall of the positioning groove, and the slide blocks (342) are slidably connected with the inner cavity of the slide blocks; A compression spring (343), wherein the compression spring (343) is located inside the slide groove.

2. The electric wheelchair backrest assembly according to claim 1, characterized in that: One end of the compression spring (343) is fixedly connected to the slider (342), and the other end of the compression spring (343) is fixedly connected to the inner wall of the slide groove.

3. The electric wheelchair backrest assembly according to claim 1, characterized in that: The top ends of the plurality of positioning rods (341) are fixedly connected to a synchronization plate (4), and a groove is provided on the outer wall of the synchronization plate (4).

4. The electric wheelchair backrest assembly according to claim 1, characterized in that: The cross-sections of the cushion plate (321) and the air-permeable plate (31) are both arc-shaped, and the cushion plate (321) is made of a heat-insulating material.

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