JP2003305087A - Wheelchair with care function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a physically handicapped person-friendly wheelchair with care function by increasing safety for prevention of turning-over and falling and reducing a load on a caregiver in a riding on and off operation of the physically handicapped person for the wheelchair by the caregiver. <P>SOLUTION: This wheelchair with care function comprises a lift mechanism 10 for vertically moving the upper part of the wheelchair, a reclining mechanism 20 having a toothed belt extensively applied to a toothed pulley to generally level the upper part of the wheelchair, a rear wheel moving mechanism 30 for moving rear wheels backward, a handrail moving mechanism 40 for lowering a hand pushing part 9 and a handrail part 8, and a swing mechanism 50 for moving the upper part of the wheelchair in a generally arc shape. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheelchair for getting in and out of an injured or sick person, a physically handicapped person or the like who is difficult to walk independently, and particularly to a bed. (Bet), etc. relates to getting on and off the wheelchair, and getting on and off the bed from the wheelchair.

[0002]

2. Description of the Related Art Conventionally, a lightweight folding wheelchair has been widely used in which a caregiver manually pushes the wheel from behind, or an injured person manually rolls the wheels on the side of the seat to move the wheelchair. In addition, a wheelchair that is electrically driven by a battery and that can be moved by a passenger's driving operation is used.

Further, a reclining mechanism, a lift mechanism,
A wheelchair provided with a slide mechanism and a mechanism capable of moving from the bed to the wheelchair and from the wheelchair to the bed (JP 2001-70A).
No. 350) publication.

[0004]

However, while the conventional wheelchair is basically used by people with disabilities, as a result of generally giving priority to the function as a means of transportation,
Although a lot of attention has been given to the function of moving,
There are some areas where we cannot say enough about getting on and off the wheelchair before and after moving.

A conventional wheelchair equipped with a sliding mechanism is
It is an easy idea that healthy people think. Because the center of gravity moves backward when reclining, the balance of the wheelchair as a whole becomes unstable, and it is possible that the wheelchair may fall backward, which poses a safety issue. Further, in the slide mechanism that moves abruptly in the lateral direction, it is possible that the inertial force exerted on the disabled person at the time of stopping may cause the wheelchair to fall in the lateral direction. Therefore, a person who uses a wheelchair is required to have a stable and well-balanced wheelchair.

The present invention has been made in view of the above problems of the prior art, and an object thereof is to prevent a person with a disability, etc., who is assisted by a caregiver from falling over or getting into a wheelchair. The purpose is to improve safety such as prevention, reduce the burden on caregivers, give a sense of security to people with disabilities, and provide a wheelchair with a stable and easy-to-use care function.

[0007]

Means for Solving the Problem Backrest 2 and seat 3
, A leg rest portion 4, a lift mechanism 10 having a function of moving the foot rest portion 5 up and down, a toothed pulley 21 at a joint portion between the backrest portion and the seat surface, and a joint portion between the seat surface and the leg rest portion. Toothed pulley 22, toothed pulley 21 and toothed pulley 2
A reclining mechanism 20 in which a toothed belt 23 is stretched between the backrest portion 2 and the leg rest portion 4 so that the backrest portion, the seat surface and the leg rest portion are substantially flat, and the upper portion of the wheelchair are A swing mechanism 50 that horizontally moves in a substantially arc shape is provided.

A rear wheel moving mechanism 30 including a support arm 32 and a bending arm 34, a hand pushing portion 9, a handrail portion 8, a guide arm 45, and a handrail moving mechanism 40 including a bending arm 42 are provided. It is a wheelchair with a support function provided.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION (Lift Mechanism) Lift Mechanism 10
Has a mechanism of 1 input shaft and 2 output shafts arranged between the chassis 11 and the support base 13, and the backrest part 2 and the seat surface 3 on the upper part of the support base 13 via the arm on the driven part on the output shaft. It is an inverted pantograph structure in which the leg rest portion 4 and the foot rest portion 5 are moved up and down.

(Reclining mechanism) The reclining mechanism 20 includes a toothed pulley 21 provided at an end of the seat surface 3,
The toothed pulley 22 is connected by a toothed belt 23, and the toothed pulley 21, and the backrest 2 and the leg rest portion 4 are substantially flat with the toothed pulley 22 as the center.

(Swing mechanism) For persons with disabilities, a swing mechanism 30 is provided between the upper and lower portions of the wheelchair, which is movable by an assistant to allow the upper and lower portions of the wheelchair to move and the upper portion to move in a substantially arc shape. By this, from the bed to the wheelchair,
You can get on and off the bed from a wheelchair.

(Rear Wheel Moving Mechanism) The rear wheel moving mechanism is a shaft 33.
The support arm 32 and the bending arm 33, which are divided into two around the center, can be extended and contracted in one direction, and the rear wheel is moved backward to stabilize the balance of the wheelchair.

(Handrail moving mechanism) The handrail moving mechanism has a folding arm 4 in which a handrail portion 8 and a hand pushing portion 9 are interlocked with a rear wheel moving mechanism.
The structure is such that it is moved downward by the 2 and the guide arm 45.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be illustratively described in detail below with reference to the drawings. However, unless otherwise specified, the configuration method, the configuration device, the configuration content, the dimensions, the materials, the shapes of the components, the relative arrangement, and the like described in this embodiment are within the scope of the present invention. It is not intended to be limited only to this, and it is merely an example of explanation.

(Rear Wheel Moving Mechanism) The rear wheel moving mechanism will be described with reference to FIGS. 1, 2 and 3. FIG. 1 shows a case where a cared person is placed and moved, and the support arm 32 and the bending arm 34 hold the rear wheel by one in-line body.

FIG. 2 is a diagram in which the rear wheel is moving, in which the supporting arm 32 and the bending arm 34 connected by the shaft 33 are moving while the supporting shaft 31 is a fulcrum.
The rear wheel shaft 35 is provided at the end of the rear wheel 7, and the rear wheel 7 moves.

FIG. 3 is a diagram in which the rearward movement of the rear wheels is completed. Since the support arm 32 and the bending arm 34 are fixed by the stopper 36, they are linearly connected. Since the reclining mechanism is operated in such a state, the reclining mechanism can be operated in a stable state.

(Handrail Moving Mechanism) The handrail moving mechanism will be described with reference to FIGS. 1, 2 and 3. The handrail moving mechanism 40 includes a hand pushing portion 9 pivotally supported by an end portion of a guide arm 45 and a bending arm 42.
Is connected to the handrail part 8 pivotally supported by a bending shaft 43. The handrail part 8 and the handrail part 8 are interlocked with the rear wheel moving mechanism 30.
Is a structure that moves downward.

The other end of the guide arm 45 is pivotally supported by the shaft 46, and the other end of the guide arm 45 is pivotally supported by the shaft 44. Therefore, the rear wheel moving mechanism 30
When the support arm 32 is moved, the guide arm 45 moves in conjunction with the handrail moving mechanism 40 via a shaft 46 provided on the support arm 32. Note that FIG. 1 is a diagram before the start of movement, FIG. 2 is a diagram during the movement, and FIG. 3 is after the movement is completed.

(Lift Means) Referring to FIG. 4, four bearings 12 are provided on the upper part of the chassis 11 and the support 1
The bearings 12 are also provided at four locations on the back surface of the bearing 3, and the lift mechanism 10 is disposed between the chassis 11 and the support 13. The main body of the lift mechanism 10 has input shafts on the front and back sides,
Since the round handle 16 of the input shaft is connected, by rotating the round handle 16, two driven parts 14 are provided on two output shafts 17 on the left and right, and the driven part 14 is driven.
And the bearings 12 are connected by an arm 15.

Therefore, by rotating the round handle 16 which is the input shaft of the lift mechanism 10, the rotational force is transmitted to the two output shafts and the driven part 14 moves in the horizontal direction. This is a mechanism for vertically moving the support base 13 by vertically moving 15 so that the backrest portion 2, the seat surface 3, the leg rest portion 4, and the footrest 5 on the upper portion of the wheelchair are vertically moved.

(Recliner) Referring to FIG. 4, the backrest portion 2 and the seat surface 3 are connected by a shaft, a toothed pulley 21 is provided at the end of the shaft, and the seat surface 3 and the leg rest portion 4 are connected by the shaft. Connect the toothed pulley 22 to the end of the shaft.
And the toothed belt 23 is stretched between the toothed pulley 21 and the toothed pulley 22.

Therefore, by applying a force in the direction in which the backrest portion 2 is tilted, the rotational force of the toothed pulley 21 is changed to the toothed belt 2.
Since it is transmitted to the toothed pulley 22 by means of 3, the leg rest portion 4 rises upward, so that the backrest portion 2, the seat surface 3, the leg rest portion 4 and the foot rest 5 are substantially flat.

The footrest 5 is also provided with an end portion 2 of the leg rest portion 4.
Since it is rotatably supported by 5 and is further urged by an elastic body (not shown), the foot rest 5 is held horizontally around the shaft 25 by removing a pin (not shown).

(Swing Means) Referring to FIG. 5,
The support base 13 is provided with a rotation shaft 52, an arm 51 connected to the rotation shaft is provided, a rotatable support plate 53 is provided at an end of the arm 51, and the backrest portion 2 is provided above the support plate.
The seating surface 3, the leg rest portion 4, and the footrest 5 are arranged.

Therefore, the backrest 2 at the upper part of the wheelchair
When a force is applied to the seat surface 3, the leg rest portion 4 and the footrest 5 in the horizontal direction, the arm 51 and the support plate 5 centering around the rotation shaft 52.
Since 3 moves in an arc, the backrest part 2, the seat surface 3, the leg rest part 4, and the footrest 5 on the upper part of the wheelchair move to the upper part of the bed.

When sitting on the wheelchair of the present invention, after the rear wheels are moved rearward by the rear wheel moving mechanism 30 to stabilize the wheelchair, the round handle 1 on the input shaft of the lift mechanism 10 is used.
By rotating 6 on the upper surface of the support base 13,
By moving the backrest portion 2, the seat surface 3, the leg rest portion 4, and the footrest portion 5 upward, and then applying a force to the backrest portion 2 by the reclining mechanism 20, the rotational force of the toothed pulley 21 is toothed. Since it is transmitted to the toothed pulley 22 by the belt 23, the backrest portion 2, the seat surface 3 and the leg rest portion 4 are made substantially flat, and the swing mechanism 50 allows the backrest portion, the seat surface and the leg rest portion at the upper portion of the wheelchair to be formed. And when the force is applied to the footrest in the horizontal direction, it moves above the bed. Once again, drive the lift mechanism to move the backrest, seat surface, leg rest and footrest,
It can be fixed on the bed and moved from the wheelchair to the bed with the help of an assistant.

When moving, the backrest 2, the seat 3, the leg rest 4 and the footrest 5 on the upper part of the wheelchair are moved horizontally by the swing mechanism and fixed on the upper part of the support 13. Round handle 16 on the input shaft of the lift mechanism 10
The support base 13 is moved downward by rotating, and then the reclining mechanism 20 interlocks with raising the backrest portion 2 so that the leg rest portion 4 bends downward and becomes a sitting posture, and then the rear wheel. The moving mechanism 30 and the handrail moving mechanism 40 are moved to move to the posture shown in FIG.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications may be made without departing from the scope of the present invention. Of course.

[0030]

According to the wheelchair with assistance function of the first aspect, by providing the swing mechanism for horizontally moving the backrest portion, the seat surface, the leg rest portion, and the footrest portion in a substantially arc shape,
Since a sudden lateral inertial force is not applied to the wheelchair, it prevents the wheelchair from falling down and prevents the disabled from falling, and the balance of the wheelchair is stable as a whole. We were able to provide a wheelchair with an assisting function that gives

In the conventional wheelchair, there is a fear that the wheelchair may fall during the reclining operation. However, since the rear wheel is moved backward by the rear wheel moving mechanism according to the second aspect, the balance of the wheelchair as a whole is stable. It became a wheelchair with improved safety by preventing falls and preventing people with disabilities from falling.

[Brief description of drawings]

FIG. 1 is a side view of the present invention during normal use.

FIG. 2 is a side view of the rear wheel moving mechanism and the handrail moving mechanism of the present invention during operation.

FIG. 3 is a side view of the rear wheel moving mechanism and the handrail moving mechanism of the present invention when the operations are completed.

FIG. 4 is a side view showing a reclining mechanism of the present invention.

FIG. 5 is a side view showing the swing mechanism of the present invention.

[Explanation of symbols]

1 ... wheelchair 2 ... Backrest 3 ... Seat 4 ... Leg resting part 5: Footrest 10 ... Lift mechanism 13 ... Support stand 14 ... Driven part 15 ... Arm 16 ... Round handle 17 ... Drive shaft 20 ... Reclining mechanism 21 ... Toothed pulley 22 ... Toothed pulley 23 ... Toothed belt 24 ... Tension pulley 30 ... Rear wheel moving mechanism 31 ... Support shaft 32 ... Support arm 33 ... Axis 34 ... Bending arm 35 ... rear wheel axle 36 ... Stopper 40 ... Handrail moving mechanism 41 ... Axis 42 ... Bending arm 43 ... Bending axis 44 ... Guide shaft 45 ... Guiding arm 46 ... Axis 50 ... Swing mechanism 51 ... Arm 52 ... Rotating axis 53 ... Support plate

Claims (2)

[Claims] 1. A backrest portion (2), a seat surface (3), a leg rest portion (4), a lift mechanism (10) provided with a function for moving the footrest portion (5) up and down, and a backrest. Toothed pulley (21) at the connecting portion between the seat portion and the seat surface, a toothed pulley (22) at the connecting portion between the seat surface and the leg rest portion, and a toothed belt between the toothed pulley 21 and the toothed pulley 22 ( The reclining mechanism (20) in which the backrest part (2) and the leg rest part (4) are interlocked so that the backrest part, the seat surface and the leg rest part are substantially flat, and the upper part of the wheelchair are A wheelchair with an assisting function, which is provided with a swing mechanism (50) that horizontally moves in a substantially arc shape. 2. A support arm (32) and a bending arm (3).
4) Rear wheel moving mechanism (30) and hand pusher (9)
2. The wheelchair with assistance function according to claim 1, further comprising a handrail part (8), a guide arm (45), and a handrail moving mechanism (40) including a bending arm (42).