Wheelchair with movable backrest

Abstract

The utility model relates to a wheelchair with a movable backrest, which comprises a seat frame and a back frame assembly, the bottom of the seat frame is connected with a front caster group and a rear caster group, the back frame assembly comprises a backrest frame and a backrest, the backrest frame is hinged to the rear side of the seat frame in a turnover manner, a slide rail assembly is arranged on the backrest frame, and the slide rail assembly is connected with the backrest. The backrest is connected to the backrest frame in an up-down sliding mode through the sliding rail assembly. The backrest on the wheelchair can slide up and down relative to the backrest frame, the attaching force is decomposed to a certain extent, the skin is easier to leave the leather surface on the backrest, a user feels more comfortable when using the wheelchair, the pain during bathing is relieved, and the experience feeling is better.

Description

Technical Field

[0001] The utility model relates to the field of wheelchairs, in particular to a wheelchair with a movable backrest. Background Art

[0002] The current wheelchair includes at least a seat frame and a back frame, and the back frame is provided with a backrest made of PU material. The wheelchair needs to be unfolded into a bed for use, so the back frame can be flipped and hinged on the rear side of the seat frame. The wheelchair also needs to meet the requirements of bathing. However, whether the back frame is converted into a bed shape or the wheelchair is used for bathing, the skin on the user's back will directly contact the leather surface of the backrest. The skin will stick closely to the leather surface due to sweat or other factors. When the user bends over, is about to leave the backrest, or the back frame flips backward, the leather surface will pull the skin, causing the user's skin to tear and hurt, affecting the user experience of the wheelchair. Therefore, in order to avoid the shortcomings of the existing technology, it is necessary to improve the existing technology. Utility Model Content

[0003] The purpose of the utility model is to solve the above-mentioned existing problems and provide a wheelchair with a movable backrest having a simple and reasonable structure.

[0004] A wheelchair with a movable backrest comprises a seat frame and a back frame assembly, wherein the bottom of the seat frame is connected to a front caster group and a rear caster group, and the back frame assembly comprises a backrest frame and a backrest, wherein the backrest frame is flip-hinged on the rear side of the seat frame, and a slide rail assembly is provided on the backrest frame, and the backrest is connected to the backrest frame by sliding up and down through the slide rail assembly.

[0005] The purpose of the utility model can also be solved by the following technical measures:

[0006] As a more specific solution, the backrest includes at least a back pad mounting plate, the back pad mounting plate is fixedly connected to the slide rail assembly, and the front side of the back pad mounting plate is connected to a flexible or elastic back pad.

[0007] As a further solution, the slide rail assembly includes a fixed slide rail and a movable slider, the fixed slide rail is longitudinally fixed on the backrest frame, the movable slider is slidably connected to the fixed slide rail, and the back pad mounting plate is fixedly connected to the front side of the movable slider.

[0008] As a further solution, the backrest frame includes a back frame outer frame, the slide rail assembly is arranged in the hollow range of the back frame outer frame, and the rear side of the back frame outer frame is assembled and connected with a back frame decorative panel, and the back frame decorative panel matches the shape of the back frame outer frame.

[0009] As a further solution, the backrest frame also includes two or more longitudinally arranged guide rail mounting plates, the two or more guide rail mounting plates are connected to the outer frame of the back frame, and each guide rail mounting plate is connected to a fixed slide rail, and each fixed slide rail is slidably connected to at least two movable sliders, and the two movable sliders are connected to at least the upper and lower parts of the back pad mounting plate.

[0010] As a further solution, the width of the backrest is greater than the width of the backrest frame, and the left and right sides of the backrest protrude equally from the left and right sides of the backrest frame respectively; the height of the backrest is greater than the height of the backrest frame, and the upper part of the backrest is higher than the upper side of the backrest frame.

[0011] As a further solution, a back motor assembly is also included, wherein the motor body of the back motor assembly is rotatably hinged on the rear side of the seat frame, and the telescopic push rod of the back motor assembly is rotatably hinged on the upper side of the backrest frame.

[0012] As a further solution, a high backrest assembly is also included, and the high backrest assembly is flipped and hinged to the upper side or the back side of the backrest frame through a back folding device assembly.

[0013] As a further solution, the high back assembly includes a high back frame, the bottom of the high back frame is connected to the back folding device assembly, and the rear side of the high back frame is connected to the handrail; a high back cushion is sleeved on the high back frame, the front side of the high back cushion is connected to a headrest, and the headrest is placed on the upper side of the backrest.

[0014] As a further solution, the front side of the seat frame is hinged with a foot support frame, and the front side of the foot support frame is hinged with a pedal frame. By flipping the back frame assembly and the foot support frame relative to the seat frame, and flipping the foot support frame relative to the foot support frame, the back frame assembly, seat frame, foot support frame and pedal frame can be flattened into a bed shape.

[0015] The beneficial effects of the utility model are as follows:

[0016] The utility model discloses a wheelchair with a movable backrest. The backrest on this wheelchair can slide up and down relative to the backrest frame, which decomposes the attachment force to a certain extent, makes it easier for the skin to leave the leather surface of the backrest, makes the user more comfortable when using it, reduces the pain when bathing, and provides a better experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of a wheelchair in this utility model.

[0018] Figure 2 This is a schematic diagram of the exploded structure of the back frame assembly in the present invention.

[0019] Figure 3 This is a schematic diagram of the exploded structure of the mid-high backrest assembly of the present invention.

[0020] Figure 4This is a schematic diagram of the structure of the wheelchair in the backrest state in the utility model.

[0021] Figure 5 This is a structural schematic diagram of the wheelchair in the flattened state in the present invention. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] like Figures 1 to 3 As shown, a wheelchair with a movable backrest includes a seat frame 11 and a back frame assembly 12. The bottom of the seat frame 11 is connected to a front caster group 15 and a rear caster group 16. The back frame assembly 12 includes a backrest frame 1 and a backrest 2. The backrest frame 1 is flip-hinged on the rear side of the seat frame 11, and a slide rail assembly 3 is provided on the backrest frame 1. The backrest 2 is connected to the backrest frame 1 by sliding up and down through the slide rail assembly 3.

[0024] The backrest 2 on this wheelchair can slide up and down relative to the backrest frame 1, which decomposes the adhesion force to a certain extent, making it easier for the skin to leave the leather surface of the backrest 2, making it more comfortable for the user to use, reducing the pain of bathing, and providing a better experience.

[0025] The backrest 2 includes at least a back pad mounting plate 21, which is fixedly connected to the slide rail assembly 3. The front side of the back pad mounting plate 21 is connected to a flexible or elastic back pad 22; since the back pad 22 is mainly made of a material similar to PU, it cannot be directly fixed to the slide rail assembly 3. Therefore, the backrest 2 is first connected through the back pad mounting plate 21, and then the back pad mounting plate 21 is fastened to the slide rail assembly 3 with screws.

[0026] In this embodiment, the slide rail assembly 3 includes a fixed slide rail 31 and a movable slider 32. The fixed slide rail 31 is longitudinally fixed on the backrest frame 1, and the movable slider 32 is slidably connected to the fixed slide rail 31. The back pad mounting plate 21 is fixedly connected to the front side of the movable slider 32. The fixed slide rail 31 and the movable slider 32 are conventional sliding structures with little friction between the two, smooth and quiet sliding, long service life, simple structure, and easy installation.

[0027] The backrest frame 1 includes a backrest outer frame 111, the slide rail assembly 3 is arranged in the hollow range of the backrest outer frame 111, and the backrest outer frame 111 is assembled and connected to the backrest decorative plate 113, and the backrest decorative plate 113 matches the shape of the backrest outer frame 111;

[0028] The back frame decorative panel 113 can shield the slide rail assembly 3, so that the back side of the wheelchair can remain beautiful, and prevent foreign objects or the fingers of the accompanying person from entering the slide rail assembly 3 during the sliding process, causing damage to the slide rail assembly 3 or injury to the accompanying person; in addition, when the user takes a shower in the wheelchair, it can avoid or reduce water splashing onto the slide rail assembly 3, causing the slide rail assembly 3 to rust and affecting its service life.

[0029] In this embodiment, the backrest frame 1 also includes two longitudinally arranged guide rail mounting plates 112, the two guide rail mounting plates 112 are connected to the back frame outer frame 111, and each guide rail mounting plate 112 is connected to a fixed slide rail 31, and each fixed slide rail 31 is slidably connected to two movable sliders 32, and the two movable sliders 32 are connected to the upper and lower parts of the back cushion mounting plate 21; they can disperse the force of the backrest 2 to the backrest frame 1, so that the backrest has sufficient support, thereby improving the comfort of the user's backrest.

[0030] The width of the backrest 2 is greater than the width of the backrest frame 1, and the left and right sides of the backrest 2 protrude evenly from the left and right sides of the backrest frame 1 respectively; the height of the backrest 2 is greater than the height of the backrest frame 1, and the upper part of the backrest 2 is higher than the upper side of the backrest frame 1; the backrest 2, which is larger than the backrest frame 1 as a whole, can increase the area of ​​support for the user's back, and helps to block the gap between the backrest 2 and the backrest frame 1, reducing water splashing onto the slide rail assembly 3 through the gap between the two.

[0031] In addition, the upper part of the backrest 2 is higher than the upper side of the backrest frame 1 because when the back frame assembly 12 of the wheelchair is flipped from the backrest state to the lying state, the backrest 2 will slide downward under the drag of the user's back. Therefore, even after the backrest 2 slides downward, the upper part of the backrest 2 is still long enough to cover the gap between it and the backrest frame 1, thereby maintaining a waterproof effect.

[0032] It also includes a back motor assembly 4, the motor body 41 of the back motor assembly 4 is rotatably hinged on the rear side of the seat frame 11, and the telescopic push rod 42 of the back motor assembly 4 is rotatably hinged on the upper side of the backrest frame 1; the back frame component 12 is electrically flipped up and down through the back motor assembly 4.

[0033] It also includes a high backrest component 5, which is flipped and hinged to the upper side or back side of the backrest frame 1 through a back folding device assembly 6; the high backrest component 5 is mainly used to support the user's head, but when the wheelchair is flattened into a bed shape, the high backrest component 5 can be replaced by other structures, so it needs to be folded to the back side of the backrest frame 1 for avoidance.

[0034] In addition, the back folding device assembly 6 on the wheelchair is a conventional folding structure and will not be elaborated here.

[0035] The high backrest assembly 5 includes a high backrest frame 51, the bottom of the high backrest frame 51 is connected to the folding back assembly 6, the rear side of the high backrest frame 51 is connected to a handrail 52, and the handrail 52 can be used to install a brake handle structure; a high backrest cushion 53 is sleeved on the high backrest frame 51, and the high backrest cushion 53 can be a beach net. The front side of the high backrest cushion 53 is connected to a headrest 54, and the headrest 54 is placed on the upper side of the backrest 2. The headrest 54 supports the user's head to improve comfort.

[0036] like Figure 4 and Figure 5 As shown, the front side of the seat frame 11 is hinged with a foot support 13, and the front side of the foot support 13 is hinged with a footrest frame 14. By flipping the back frame assembly 12 and the foot support 13 relative to the seat frame 11, and flipping the footrest frame 14 relative to the foot support 13, the back frame assembly 12, the seat frame 11, the foot support 13 and the footrest frame 14 are flattened into a bed shape. This structure allows the wheelchair to be unfolded into a bed shape.

[0037] The above is a preferred embodiment of the present invention, which shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A retractable wheelchair comprising a seat frame (11) and a back frame assembly (12), wherein the bottom of the seat frame (11) is connected to a front caster assembly (15) and a rear caster assembly (16), characterized in that: The back frame assembly (12) includes a backrest frame (1) and a backrest (2), wherein the backrest frame (1) is flip-hinged on the rear side of the seat frame (11), and a slide rail assembly (3) is provided on the backrest frame (1), and the backrest (2) is connected to the backrest frame (1) by sliding up and down through the slide rail assembly (3); the backrest (2) includes at least a back pad mounting plate (21), and the back pad mounting plate (21) is fixedly connected to the slide rail assembly (3), and the front side of the back pad mounting plate (21) is connected to a flexible or elastic back pad (22).

2. The wheelchair with movable backrest according to claim 1, characterized in that: The slide rail assembly (3) includes a fixed slide rail (31) and a movable slider (32), wherein the fixed slide rail (31) is longitudinally fixed to the backrest frame (1), the movable slider (32) is slidably connected to the fixed slide rail (31), and the back pad mounting plate (21) is fixedly connected to the front side of the movable slider (32).

3. The wheelchair with movable backrest according to claim 2, characterized in that: The backrest frame (1) includes a backrest outer frame (111), the slide rail assembly (3) is arranged in a hollow range of the backrest outer frame (111), and the rear side of the backrest outer frame (111) is assembled and connected with a backrest decorative plate (113), and the backrest decorative plate (113) matches the shape of the backrest outer frame (111).

4. The wheelchair with movable backrest according to claim 3, characterized in that: The backrest frame (1) further comprises two or more longitudinally arranged guide rail mounting plates (112), the two or more guide rail mounting plates (112) being connected to the backrest outer frame (111), and each guide rail mounting plate (112) being connected to a fixed slide rail (31), and each fixed slide rail (31) being slidably connected to at least two movable sliders (32), and the two movable sliders (32) being connected to at least the upper and lower parts of the back cushion mounting plate (21).

5. The wheelchair with movable backrest according to claim 1, characterized in that: The width of the backrest (2) is greater than the width of the backrest frame (1), and the left and right sides of the backrest (2) protrude equally from the left and right sides of the backrest frame (1); the height of the backrest (2) is greater than the height of the backrest frame (1), and the upper part of the backrest (2) is higher than the upper side of the backrest frame (1).

6. The wheelchair with movable backrest according to claim 1, characterized in that: It also includes a back motor assembly (4), wherein the motor body (41) of the back motor assembly (4) is rotatably hinged to the rear side of the seat frame (11), and the telescopic push rod (42) of the back motor assembly (4) is rotatably hinged to the upper side of the backrest frame (1).

7. The wheelchair with movable backrest according to claim 1, characterized in that: It also includes a high backrest assembly (5), which is flipped and hinged to the upper side or back side of the backrest frame (1) through a back folding device assembly (6).

8. The wheelchair with movable backrest according to claim 7, characterized in that: The high backrest assembly (5) includes a high backrest frame (51), the bottom of the high backrest frame (51) is connected to the folding device assembly (6), and the rear side of the high backrest frame (51) is connected to the handrail frame (52); a high backrest cushion (53) is sleeved on the high backrest frame (51), and the front side of the high backrest cushion (53) is connected to a headrest (54), and the headrest (54) is placed on the upper side of the backrest (2).

9. The wheelchair with movable backrest according to claim 1, characterized in that: The front side of the seat frame (11) is hinged with a foot support frame (13), and the front side of the foot support frame (13) is hinged with a pedal frame (14). By flipping the back frame assembly and the foot support frame (13) relative to the seat frame (11), and flipping the pedal frame (14) relative to the foot support frame (13), the back frame assembly, the seat frame (11), the foot support frame (13) and the pedal frame (14) are flattened into a bed shape.

Images