JP3171562B2 - Reclining wheelchair - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheelchair suitable for nursing a seriously ill patient or a bedridden elderly person.

[0002]

2. Description of the Related Art Generally, when a bedridden patient is changed from a bed to a wheelchair or from a wheelchair to a bed, the wheelchair is brought to the side of the bed and a plurality of caregivers hold the patient and change the state. If it is a reclining type, a wheelchair with a flat top is brought to the side of the bed and the caregiver lifts it or slides it sideways to change it, but from the viewpoint of labor and safety, the reclining type wheelchair is superior. I have.

[0003] However, in the conventional wheelchair, even though it is a full reclining type, the backrest, the seating surface, and the lower limb are interlocked and horizontal, and the footrest is not interlocked. At best, it is manually set to an appropriate position and angle afterwards.

Further, in a conventional reclining type wheelchair, if the backrest is lowered from the state of sitting on the chair to make the upper surface horizontal, the position of the center of gravity of the human body is behind the rear wheel, and the backrest side is turned over, which is dangerous.

Further, when the wheelchair is put on the side of a bed or the like, there is a gap between the backrest and the seat surface and the bed, and when the human body is slid sideways, it cannot be moved smoothly.

In order to cope with such a problem, for example, when a backrest is tilted down, a wheelchair in which a rear wheel moves rearward in conjunction therewith has been put out. Therefore, the height changes with the movement of the rear wheel, and it is not possible to set an appropriate position and angle.

[0007] In some cases, a support is provided beneath the backrest to prevent the vehicle from tipping over, but lacks mobility when moving in a horizontal state.

[0008] In order to fill the gap with the bed, there is a handrail whose height can be adjusted so that it can be set on the same surface as the seating surface.

[0009]

As described above, in the conventional wheelchair, even if it is easy to change the bed with a bed by full reclining, the operability and the stability in the horizontal state when the horizontal state is achieved. There is a problem with mobility. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and to provide a stable and mobile wheelchair in which the upper surface of the wheelchair becomes a uniform horizontal surface with a simple operation.

[0010]

In order to achieve the above object, a wheelchair according to the present invention has a structure in which a seat surface, a lower limb portion, and a footrest portion connected by links are all in the same horizontal plane by lowering a backrest. I have. Conversely, when the backrest is raised, the seat surface is slightly lowered backward, the lower limbs are bent and fall down, and the footrests are lowered substantially in parallel.

The wheelchair according to the present invention is configured so that when the backrest is tilted, the rear wheel moves horizontally rearward.
Conversely, when the backrest is raised, the rear wheels move horizontally forward.

Further, a swing is provided on the backrest portion, and a handrail is provided on the seat surface, so that the backrest portion and the seating surface are formed by turning or sliding, respectively.

[0013]

In the wheelchair according to the present invention, the seat surface, the lower limb portion, and the footrest portion connected by the link mechanism are all simultaneously in the same horizontal plane by one operation of lowering the backrest, and when the patient is transferred to a bed or the like. Construct a suitable uniform and level bed surface. Conversely, when the backrest is raised, the seat surface is slightly lowered backward, the lower limbs are bent and fall down, and the footrests are lowered almost in parallel, so that the wheelchair is stable and comfortable to sit on.

Further, in the wheelchair according to the present invention, when the backrest is lowered, the rear wheel moves horizontally rearward by the link mechanism.
It is configured as a stable bed corresponding to the change of the center of gravity due to the movement of the human body. Furthermore, since the rear wheel moves horizontally instead of turning, there is no change in the inclination of the wheelchair body due to the movement. Conversely, when the backrest is raised, the rear wheel moves horizontally forward by the link mechanism, and becomes a position suitable for the exercise function as a wheelchair, without impairing its exercise performance.

Further, the gap between the bed and the wheelchair when transferring to and from a bed or the like can be filled by adjusting the tilt of the backrest or the handrail of the seat surface to an appropriate position, so that there is no clogging or dropping. Transfer is possible.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a case where the backrest is raised to form a wheelchair, and FIG. 2 shows a case where the backrest is tilted to have a horizontal upper surface. Both are side views, but show the link mechanism in an easily understood manner.

1 and 2, as shown in FIGS.
The two seats, the three lower limbs, and the four feet rest are connected to bend freely. In FIG. 1, when one backrest is tilted rearward around the fulcrum 1, the five links 1 rotatably mounted on the one backrest become the six links 2 rotatably mounted on the 22 frame body. Pushing forward, the three lower limbs rotate forward via the seven links 3 rotatably mounted on the six links 2 and the three lower limbs. At the same time, the four-legged portion is rotatably connected at one end to the two seats by an eight-link 4 rotatably mounted, and the three-legged portion is rotated forward with the four-legged portion. Gradually changes its angle and moves upward.

Therefore, when one backrest is in a horizontal state, the rear of the two seats is also connected to the one backrest, and the front part is connected to the three lower limbs pushed forward by the seven links 3. As a result of the connection, as shown in FIG. 2, it becomes horizontal at a position higher than the seating surface of the wheelchair shown in FIG. 3 lower limbs connected by 7 links 3 simultaneously, and 2 seats and 8
The four foot rests connected by the link 4 are also horizontal.
Therefore, a horizontal upper surface is formed as shown in FIG.

On the contrary, in FIG.
, The five links 1 rotatably mounted on the backrest portion pull the six links 2 rotatably mounted on the 22 frame body backward, and the six links 2 and 3 The three lower limbs rotate rearward via the seven links 3 rotatably mounted on the lower limbs. At the same time, the four feet
One end is rotatably connected to two seats by an eight link 4 rotatably mounted. As the lower limb rotates rearward, the angle of the four-legged portion gradually changes. Move down.

Accordingly, when one backrest is in the state of leaning as shown in FIG. 1, the rear of the two seating surfaces is pulled back by the connection with the one backrest, and the front part thereof is pulled backward by the seven links 3. By the connection with the three lower limbs, as shown in FIG. 1, a lower portion is formed at a position lower than the seating surface when the horizontal plane shown in FIG. 7 at the same time
The three lower limbs connected by the link 3 pivot backward, and the four foot rests connected by the two seats and the eight links 4 move downward while gradually changing the angle to form a foot rest. I do. Thus, a wheelchair is formed as shown in FIG.

Next, as shown in FIG.
, The 25 link 8 rotates clockwise around the 23 fulcrum 2 via the 24 link 7 rotatably mounted on the backrest. At this time, there is a long hole at the lower end of the 25 link 8, and the 20 rear wheel axle is fitted in this hole. The 20 rear wheel axle is fixed to a 21 rear wheel axle holder and slides rearward on two 19 slide shafts.
Therefore, when the backrest is tilted backward, the rear wheels are horizontally moved rearward by the 25 links 8.

Conversely, in FIG. 2, when one backrest portion is raised forward around the nine fulcrum points 1, two 25links 8 are connected via the 24 links 7 rotatably mounted on the one backrest portion.
It rotates counterclockwise around the three fulcrums 2. At this time, there is a long hole at the lower end of the 25 link 8, and the 20 rear wheel axle is fitted in this hole. The 20 rear wheel axle is fixed to the 21 rear wheel axle holder and slides forward on two 19 slide shafts. Therefore, when one backrest portion is raised forward, the rear wheels are horizontally moved forward by the 25 links 8.

The one backrest and the 22 frame body are connected by 16 fixed cylinders. The 16 fixed cylinders are rotatably supported by the 1 backrest portion and the 22 frame body, respectively, and can be slid in the axial direction by a simple hand lever operation, and the length thereof can be arbitrarily set. Therefore, the backrest can be adjusted and fixed at an arbitrary angle.

The five links 1 and the 22 frame body are connected by ten stoppers. The 10 stoppers are rotatably supported on the 5 links 1 and are fixed to the 22 frame body via 15 fixing brackets. The 10 stoppers are freely moved by releasing the fixing of the 15 fixing bracket, and are fixed by fixing with the 15 fixing bracket. The reclining angle can be fixed with the above-mentioned 16 fixed cylinder,
Further, by providing 10 stoppers, rattling of each part due to rattling at many link parts including the two seat surfaces is eliminated, and a stable state is provided.

The two seating surfaces and the 22 frame main body are 11
The links are connected by links 5 and 12 and are supported by 13 springs mounted on 14 spring guides.
The upper portion of the spring guide is simultaneously supported by a shaft supporting portion with the two seats of the 12 link 6, and the lower portion thereof is loosely fitted to a spring support 26 fixed to the frame body 22. And one
The 13 springs inserted into the 4 spring guides are compressed and mounted between the upper portion of the 14 spring guide and the 26 spring receiver. Thus, when the backrest is tilted to shift from the wheelchair state shown in FIG. 1 to the horizontal state shown in FIG. 2, the seat surface is pushed up and the operation can be performed lightly.

The length of the eight links 4 is adjustable, and the eight links 4 have a structure that can cope with adjusting the distance by inserting and removing the four-legged portion from the three lower limbs according to the length of the human foot.

FIGS. 3 and 4 are side views showing the operation of the tilting of the backrest and the handrail of the seat. FIG. 3 is a view showing a state of a wheelchair, in which 27 tilts rotatably supported by one backrest portion are raised, and in this state, it functions to prevent the body from skidding. In addition, 28 railings are attached to the 29 railing bracket attached to the 22 frame body, and 3
0 It is fixed with a handrail fixing screw, and is fixed in a state of being pulled out upward so as to act as a handrail.

FIG. 4 is a view showing a state in which a single horizontal plane is formed by full reclining. The 27 swings rotatably supported by one backrest are tilted in the same horizontal plane as the one backrest. I have. The 28 handrail is attached to the 29 handrail bracket attached to the 22 frame body.
It is fixed with a handrail fixing screw, and is fixed in a state where it is pushed down so as to form the same horizontal plane as the seat surface.

[0029]

As described above, according to the wheelchair of the present invention, the upper surface thereof can be easily made completely uniform and horizontal by one operation of lowering the backrest. Since the horizontal plane is formed at a position higher than the surface height, the patient is closer to the upper surface of the bed and can easily transfer the patient to and from the bed. At the same time, when in a horizontal state, the rear wheel can move horizontally backward to support the upper part for a longer span, so that the machine does not turn over due to the movement of the center of gravity of the patient, A stable state can be maintained. In addition, it can be easily turned into a wheelchair with one operation of raising the backrest,
Further, since the seat surface is slightly lowered downward, stable sitting comfort can be provided. In addition, a tilt and a handrail are provided to rotate or slide at an appropriate position when transferring to a bed or the like to fill a gap between the bed or the like, so that smoother transfer can be performed.

[Brief description of the drawings]

FIG. 1 is a diagram showing a wheelchair state.

FIG. 2 is a view showing an example in which a uniform horizontal surface is formed by full reclining.

FIG. 3 is a diagram illustrating the effects of tilt and handrail in a wheelchair state.

FIG. 4 is a diagram showing the effects of tilt and handrail in a state where a uniform horizontal surface is formed by full reclining.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Backrest part 2 Seat surface 3 Lower limb part 4 Foot rest part 5 Link 1 6 Link 2 7 Link 3 8 Link 4 9 Support point 1 10 Stopper 11 Link 5 12 Link 6 13 Spring 14 Spring guide 15 Fixture 16 Fixing cylinder 17 Rear wheel 18 Front wheel 19 slide shaft 20 rear wheel shaft 21 rear wheel shaft holder 22 frame body 23 fulcrum 2 24 link 7 25 link 8 26 spring receiver 27 tilt 28 railing 29 railing bracket 30 railing fixing screw

Claims (2)

(57) [Claims] When the backrest is tilted backward, the rear wheels move horizontally rearward, thereby increasing the wheelbase between the rear wheels and the front wheels. At the same time, the seating surface, the lower limbs, and the footrests are placed on the backrest. When the backrest is raised, the rear wheel horizontally moves forward, and the wheelbase decreases.At the same time, the rear part of the seat surface is lowered and the front surface is raised. A reclining wheelchair, wherein the lower limb and the footrest are bent in conjunction with each other to form a chair with a footrest. 2. When the backrest is tilted rearward, the trunk holding jaws installed on both sides of the backrest are opened to form the same plane as the backrest, and the handrail is also slid down to be flush with the seating surface. And when the back part is raised,
2. The wheelchair according to claim 1, wherein the tilt is raised to form a trunk holding device, and the handrail is also raised to act as a trunk holding and a handrail.