TWI863624B - Convertible wheelchair - Google Patents

Abstract

A rotatable wheelchair comprises a base frame, a plurality of wheels connected to the seat frame, a seat frame connected to the base frame with adjustable height, a back panel armrest assembly, and a hollow portion, wherein the seat frame has a rear connecting portion, the back panel armrest assembly is connected to the rear connecting portion, and comprises two back panel armrest members, wherein at least one back panel armrest member can be pivotally connected to the rear connecting portion relative to the seat frame, the hollow portion is formed between a seat plate of the seat frame and the base frame, and openings are formed on opposite sides and a rear side of the hollow portion. The rotatable wheelchair of the present invention has the functions of a wheelchair, a walking aid, and a rotation, and can make it safer and more convenient for users to rotate on different seat surfaces, and is convenient for users to rotate by themselves.

Description

Convertible wheelchair

The present invention relates to an assistive device, in particular to a rotatable wheelchair which is convenient for users to rotate between different seat surfaces.

In addition to facilitating the mobility of people with limited mobility, existing wheelchairs require users to switch between different seating surfaces every day, such as moving from a wheelchair to a bed, from a toilet back to a wheelchair, from a wheelchair to a car, etc.

On average, a wheelchair user needs to transfer 15 to 20 times a day. When transferring from an existing wheelchair, a transfer board is needed to assist. The user first sets up the transfer board between the wheelchair and the bed surface, and places it under the wheelchair user's hips, so that the wheelchair user can move along the transfer board from the wheelchair to the bed surface, or from the bed surface to the wheelchair.

Since the transfer board is an additional auxiliary product, if it is not firmly installed, the transfer board is easy to slide or even fall when the wheelchair user is transferring, causing hidden safety concerns.

In view of this, the main purpose of the present invention is to provide a rotatable wheelchair, which can move the seat plate of the wheelchair to the seat surface and open the backrest to the side, so as to quickly rotate the body to the bed surface or chair.

In order to achieve the above-mentioned purpose, the invertible wheelchair of the present invention comprises: a base frame, the base frame comprises a lower connecting portion, the lower connecting portion is located at the front side of the base frame; a plurality of wheel bodies, the plurality of wheel bodies are installed on the base frame at intervals; a seat frame, the seat frame is connected to the base frame with adjustable height, and the seat frame comprises a seat plate; an upper connecting portion, the upper connecting portion is adjacent to the front side of the seat frame, is located below the seat plate, and is connected to the lower connecting portion with adjustable height; and a rear connecting portion, the rear connecting portion is adjacent to the rear side of the seat frame; A back panel armrest assembly, the back panel armrest assembly is connected to the rear connecting portion and includes two back panel armrest members, at least one of which can be pivotally connected to the rear connecting portion relative to the seat frame, and the two back panel armrest members have two armrest portions respectively located on opposite sides and extending forward; and a hollow portion, the hollow portion is formed between the seat plate and the base frame, and the opposite sides and rear side of the hollow portion form openings.

By utilizing the above technical features, the invertible wheelchair of the present invention has the following advantages:

1. The height of the seat frame can be adjusted, which is convenient for the user to adjust the relative height of the seat frame according to the height of the bed surface or the chair surface.

2. The hollow portion between the seat frame and the base frame facilitates pushing the base frame of the convertible wheelchair into the hollow portion under the bed or chair, so that the seat plate can be supported on the bed surface or chair surface.

3. The backrest armrest assembly has at least one backrest armrest member that can pivot relative to the seat frame. The user can pivot and open the backrest armrest to quickly switch between the seat and the bed surface or chair surface.

4. The user can hold the two armrests of the backrest assembly and use the transferable wheelchair of the present invention as a rehabilitation walker.

1 to 4, a first preferred embodiment of the rotatable wheelchair of the present invention comprises a base frame 10, a plurality of wheels 15A, 15B, a seat frame 20, a backrest armrest assembly 30, and a hollow portion.

The base frame 10 includes a lower connecting portion 13, which is located at the front side of the base frame 10 and extends upward. Specifically, the lower connecting portion 13 includes two lower connecting members 131 arranged at intervals on the left and right, and the two lower connecting members 131 extend upward. The base frame 10 also includes two bottom rods 11 and two pedal portions 14. The two bottom rods 11 extend backward from the two lower connecting members 131 and are adjacent to the bottom ends of the two lower connecting members 131. The two pedal portions 14 are respectively connected to the bottom ends of the two lower connecting members 131 and extend toward each other. The plurality of wheel bodies 15A, 15B are installed on the base frame 10 at intervals. The plurality of wheel bodies 15A, 15B include two front wheel bodies 15A and two rear wheel bodies 15B. The two front wheel bodies 15A are adjacent to the front ends of the two bottom rods 11, and the two rear wheel bodies 15B are adjacent to the rear ends of the two bottom rods 11. The wheel diameter of each front wheel body 15A is larger than the wheel diameter of each rear wheel body 15B. Each rear wheel body 15B can use a brake wheel to facilitate the user to fix the rotatable wheelchair.

The seat frame 20 is connected to the base frame 10 in an adjustable height. The seat frame 20 includes a seat plate 21, an upper connecting portion 23, and a rear connecting portion 25. The upper connecting portion 23 is adjacent to the front side of the seat frame 20, is located below the seat plate 21, and is connected to the lower connecting portion 13 in an adjustable height. The upper connecting portion 23 includes two upper connecting members 231 arranged at intervals on the left and right. The two upper connecting members 231 are respectively connected to the two lower connecting members 131 and can move up and down relative to the two lower connecting members 131. A height driving unit 40 may be provided between the upper connecting portion 23 and the lower connecting portion 13. The height driving unit 40 drives the seat frame 20 to move up and down relative to the base frame 10. The height driving unit 40 may use a pneumatic cylinder or an electric device to drive the upper connecting portion 23 to move up and down relative to the lower connecting portion 13, thereby driving the seat frame 20 to rise or fall. The rear connecting portion 25 is adjacent to the rear side of the seat frame 20 and is located above the seat plate 21.

Preferably, the two lower connecting members 131 extend obliquely upward and backward, and the two upper connecting members 231 extend obliquely downward and forward from the bottom of the seat plate 21, and are respectively connected to the two lower connecting members 131, and each upper connecting member 231 has the same inclination angle as its corresponding lower connecting member 131. A seat plate bracket 22 is connected to the two upper connecting members 231 and is located at the top of the two upper connecting members 231. The seat plate 21 is fixed above the seat plate bracket 22, and the rear connecting portion 25 is connected to the top end of the seat plate bracket 22.

The back panel armrest assembly 30 is connected to the rear connecting portion 25 and includes two back panel armrest members 31, wherein at least one of the back panel armrest members 31 can be pivotally connected to the rear connecting portion 25 relative to the seat frame 20 so that the back panel armrest member 31 can be opened laterally, and the two back panel armrest members 31 include two armrest portions 313 respectively located on opposite sides and extending forward, and the two armrest portions 313 are located higher than the seat plate 21 and are spaced from the seat plate 21. Preferably, both backrest members 31 can be pivotally connected to the rear connecting portion 25 relative to the seat frame 20, and a positioning member 33, such as a positioning bolt, can be provided between each backrest member 31 and the rear connecting portion 25 to fix the relative angle between the backrest member 31 and the rear connecting portion 25 to prevent the backrest member 31 from pivoting relative to each other during use; further, the positioning member 33 can also use a self-locking positioning member, such as a positioning member with a latch structure or a ratchet structure, and can position the backrest member 31 after adjusting the relative angle of each backrest member 31 to prevent the backrest member 31 from rotating.

Please refer to FIG. 5 , a rotation drive member 50 such as a motor may also be provided between each backboard armrest member 31 and the rear connecting portion 25 , and the rotation drive member 50 can drive the backboard armrest member 31 to rotate relative to the rear connecting portion 25 .

1 to 5 , the hollow portion is formed between the seat plate 21 and the base frame 10 , and openings are formed at opposite sides and the rear side of the hollow portion to facilitate pushing the seat plate 21 onto the seat surface.

Please refer to Figures 1, 2, and 5. The convertible wheelchair can further have a height control unit 61 and an opening and closing control unit 63. The height control unit 61 is electrically connected to the height drive unit 40, and can control the height drive unit 40 to drive the seat frame 20 to move up and down relative to the base frame 10. The opening and closing control unit 63 is electrically connected to each rotating drive member 50, and can control each rotating drive member 50 to drive its corresponding back panel armrest member 31 to pivotally open and close relative to the seat frame 20.

Please refer to Figures 6 and 7. When in use, the height of the seat frame 20 can be adjusted according to the height of the seat surface, such as the height of the bed surface or the chair surface, so that the seat plate 21 is slightly higher than the seat surface, and the base frame 10 can be pushed into the hollow part under the bed or the chair, and the seat plate 21 can be pushed into the seat surface and rest on the seat surface.

Please refer to FIG. 8 , and the backrest armrest 31 on one side can be pivoted to facilitate the user to directly shift between the seat plate 21 and the seat surface from the side, and to facilitate the user whose upper body can exert force by himself to shift by himself, which is safer and more convenient to use.

When the user stands, he can also hold the two armrest parts 313 of the two back armrest parts 31 and use the invertible wheelchair of the present invention as a rehabilitation walker.

The invertible wheelchair of the present invention has the functions of a wheelchair, a walking aid, and invertible, and can make it safer and more convenient for the user to invert on different seat surfaces, and is convenient for the user to invert by himself.

10: Base frame

11: Bottom bar

13: Lower connection

131: Lower connecting piece

14: Pedal

15A, 15B: Wheel body

20: Seat

21: Seat plate

22: Seat bracket

23: Upper connection

231: Upper connector

25: Rear connection

30: Backrest armrest set

31: Back panel armrest

313: Armrest

33: Positioning piece

40: Height drive unit

50: Rotary drive

61: High and low control unit

63: Opening and closing control unit

Figure 1 is a three-dimensional external view of the first preferred embodiment of the present invention. Figure 2 is a side view of the first preferred embodiment of the present invention. Figure 3 is a top view of the first preferred embodiment of the present invention. Figure 4 is a rear view of the first preferred embodiment of the present invention. Figure 5 is a rear view of the second preferred embodiment of the present invention. Figure 6 is a schematic diagram of the action of adjusting the height of the seat frame of the first preferred embodiment of the present invention. Figure 7 is a schematic diagram of the use of the first preferred embodiment of the present invention to push the bed body. Figure 8 is a top view of the backboard armrest of the first preferred embodiment of the present invention with the backboard armrest opened.

10: Base frame

11: Bottom bar

13: Lower connection part

131: Lower connector

14: Pedal section

15A, 15B: wheel body

20: Seat frame

21: Seat plate

22: Seat bracket

23: Upper connection part

231: Upper connector

25: Rear connection part

30: Backrest armrest set

31: Back panel armrest

313: Armrests

33: Positioning piece

61: High and low control unit

63: Opening and closing control unit

Claims (8)

A rotatable wheelchair comprises: a base frame, the base frame comprises a lower connecting portion, the lower connecting portion is located at the front side of the base frame; a plurality of wheel bodies, the plurality of wheel bodies are installed on the base frame at intervals; a seat frame, the seat frame is connected to the base frame in an adjustable height, and the seat frame comprises a seat plate; an upper connecting portion, the upper connecting portion is adjacent to the front side of the seat frame, is located below the seat plate, and is connected to the lower connecting portion in an adjustable height; and a rear connecting portion, the rear connecting portion is adjacent to the rear side of the seat frame; a backboard armrest assembly, the backboard armrest assembly is connected to the rear connecting portion, and comprises two backboard armrests. Parts, wherein at least one of the backboard armrest parts can be pivotally connected to the rear connecting part relative to the seat frame, and the two backboard armrest parts have two armrest parts respectively located on opposite sides and extending forward; a hollow part, the hollow part is formed between the seat plate and the base frame, and the opposite sides and the rear side of the hollow part form an opening; the lower connecting part includes two lower connecting parts arranged at intervals on the left and right, and the two lower connecting parts extend upward; the upper connecting part includes two upper connecting parts arranged at intervals on the left and right, and the two upper connecting parts are respectively connected to the two lower connecting parts and can move up and down relative to the two lower connecting parts. The rotatable wheelchair as described in claim 1, wherein the base frame includes two bottom rods and two pedal parts; the two bottom rods extend backward from the two lower connecting parts respectively and are adjacent to the bottom ends of the two bottom rods; the two pedal parts are respectively connected to the bottom ends of the two lower connecting parts. The rotatable wheelchair as described in claim 2, wherein the two lower connecting parts extend obliquely upward and backward; and the two upper connecting parts extend obliquely downward and forward from the bottom of the seat plate. A rotatable wheelchair as described in any one of claims 1 to 3, wherein a height drive unit is provided between the upper connecting portion and the lower connecting portion, and the height drive unit can drive the upper connecting portion to move up and down relative to the lower connecting portion. A rotatable wheelchair as described in any one of claims 1 to 3, wherein the two backrest armrests can be pivotally connected to the rear connection portion relative to the seat frame. The rotatable wheelchair as described in claim 4, wherein the two backrest armrests can be pivotally connected to the rear connection portion relative to the seat frame. The rotatable wheelchair as described in claim 6, wherein a positioning member is provided between each backrest armrest member and the rear connecting portion. As described in claim 6, the rotatable wheelchair has a rotating drive member between each backrest member and the rear connecting portion, and the rotating drive member can drive the backrest member to rotate relative to the rear connecting portion.

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