JPH0759816A - Wheelchair - Google Patents

Abstract

PURPOSE:To provide the wheelchair which can tilt a step in a stable attitude by a simple structure. CONSTITUTION:A step 40 is constituted of a first step 41 supported by a seat 30, and a second step 42 which is supported so as to be flexible by the lower part of a first step 41, and also, provided with a foot plate 50, and provided with a turning arm 43 supported so as to be freely turnable by a first step 41, a first link 44 whose both end parts are attached axially to each of one end parts of the turning arm 43 and a main body, and a second link 45 whose both end parts are attached axially to each of the other end parts of the turning arm 43 and a second step 42.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheelchair, and more particularly, to a wheelchair having a main body having front wheels and rear wheels pivotally mounted, a backrest arranged on the rear wheel side of the main body, and a foot plate. The present invention relates to a wheelchair including a step arranged on the front wheel side of a main body and a seat arranged between the step and the backrest, and the step being tiltably supported on the seat.

[0002]

2. Description of the Related Art Generally, a wheelchair has a main body on which front wheels and rear wheels are axially mounted, a backrest arranged on the rear wheel side of the main body, and a foot plate on which a foot is placed and which is arranged on the front wheel side of the main body. The step is provided and a seat is provided between the step and the backrest. Among such wheelchairs, there are, for example, those in which the backrest is tiltably supported so that the user can recline, and further, the step is also tiltably supported so that the user can tilt. There are things that allow you to recline to a more relaxed position.

[0003]

However, in the conventional wheelchair, since the foot plate is fixed with respect to the step, when the step is tilted upward, the foot of the user placed on the foot plate is removed. It was pushed up by the foot plate, and the posture of the user became unstable because the entire lower half of the body was displaced. Therefore, there is a problem that the user has to correct the posture each time the step is tilted.

In particular, wheelchair users, who are physically handicapped due to injury or illness, may require a great deal of effort to correct their postures, and need help from a caregiver. In some cases. Therefore, there has been a demand for a wheelchair in which the posture of the user does not become unstable even when the step is tilted.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a wheelchair capable of tilting steps while maintaining a stable posture.
It is to provide by a simple structure.

[0006]

The means adopted by the present invention for solving the above-mentioned problems will be described with reference to the reference numerals used in the drawings. "A main body in which a front wheel 11 and a rear wheel 12 are axially attached 10, a backrest 20 arranged on the rear wheel 12 side of the main body 10, and a front plate 11 of the main body 10 having a foot plate 50.
A wheelchair 100 that includes a step 40 disposed on the side and a seat 30 disposed between the step 40 and the backrest 20 and that supports the step 40 on the seat 30 in a tiltable manner. The step 40 comprises a first step 41 supported by the seat 30 and a second step 42 supported by the lower part of the first step 41 so as to be extendable and contractible and provided with the foot plate 50. A rotation arm 43 rotatably supported by the first step 41,
A first link 44 having both ends attached to one end of the rotating arm 43 and the main body 10, and both ends attached to each of the other end of the rotating arm 43 and the second step 42. Wheelchair 1 characterized by having a second link 45 worn
00 ”.

[0007]

The wheelchair 100 of the present invention thus constructed operates as follows.

First, the step 40 comprises a first step 41 supported by the seat 30 and a second step 42 supported by the lower part of the first step 41 so as to be able to extend and contract. A rotation lever 43 is rotatably supported by the. Both ends of the first link 44 are pivotally attached to one end of the turning lever 43 and the main body 10, respectively, and the other end of the turning lever 43 and each of the second steps 42 are attached to each other. Both ends of the second link 45 are pivotally attached. Therefore, for example, as shown in FIGS. 3 and 4, when the step 40 is tilted, the rotation arm 43 is rotated by the first link 44, and the rotation of the rotation arm 43 causes the second arm 45 to rotate. The second step 42 will expand and contract. That is, the entire length of step 40 expands and contracts. Here, the expansion and contraction of the entire step 40 is performed by the first link 44 and the rotating arm 43 as described above.
And the second link 45, so step 40
Tilts upward to extend, and tilting step 40 downward causes contraction.

By the way, the foot plate 50 is provided in the second step 42. That is, it is provided at the bottom of the entire step 40 that expands and contracts. Therefore, seat 3
The distance between 0 and the foot plate 50 expands and contracts according to the expansion and contraction of the length of the entire step 40. Therefore, when the step 40 is tilted upward, the distance between the seat 30 and the foot plate 50 is increased, and even if the step 40 is tilted upward, the foot plate 50 does not push up the user's foot. The posture of the person does not become unstable.

[0010]

Embodiments of the wheelchair 100 according to the present invention will now be described in detail with reference to the drawings. In addition, in the drawings in this embodiment, the wheelchair 1 is shown so that the structure is clear.
00 frame is shown, but a cover (not shown) having elasticity is appropriately arranged in this frame.

FIG. 1 shows an embodiment of a wheelchair 100 according to the present invention. A pair of front wheels 11 and a pair of rear wheels 12 are axially mounted on the lower portion of the main body 10, and a back support pin 20 is provided on the rear wheel 12 side upper portion of the main body 10 via a back support pin 21.
Is tiltably supported. In addition, this back rest 20
Is divided into an upper portion and a lower portion, and the upper portion is foldable forward so that the whole is compactly housed when the wheelchair 100 is transported (not shown). Further, the backrest 20 projects downward from the backrest pin 21, and the backrest 20 side of the seat 30 is rotatably supported via the seat pin 31 at the end of this projecting portion. . The step 40 side of the seat 30 is rotatably supported on the front wheel 11 side upper portion of the main body 10 via a seat pin 32. Further, the seat pin 32 is loosely fitted in a long hole provided in the main body 10 so that the seat 30 can slide with respect to the main body 10.

Next, the step 40 is tiltably supported at the end of the seat 30 on the step 40 side via a step pin 46. The lower part of the step pin 46 in step 40 is located below the seat 30. One end of the connecting rod 47 provided is pivotally attached by a connecting pin 49. The other end of the connecting rod 47 is connected to the back support pin 2 of the back support 20.
1 is pivotally attached to the end of an arm 23, which is fixed to the lower part of 1 and is substantially L-shaped in side view, via a connecting pin 48.

As shown in FIG. 2, the wheelchair 100 having the above-described structure is provided with the backrest 20 when the backrest 20 is tilted.
The tilt of the seat 30 (arrow A) causes the entire seat 30 to move to step 4.
It moves in the 0 direction (arrow B) and the back rest 20 of the seat 30
The side rises (arrow C), and the step 40 tilts with respect to the seat 30 (arrow D).

On the other hand, as shown in FIG.
Is composed of a first step 41 tiltably supported by the seat 30 via a step pin 46 and a second step 42 supported by the first step 41 so as to extend and contract. , The second step 42. A rotating arm 43 is rotatably supported at a substantially central portion of the first step 41 via a pin 43a, and one end portion of the first link 44 is provided at each end of the rotating arm 43. And one end of the second link 45 are pivotally attached by pins 43b and 43c. The other end of the first link 44 is pivotally attached to the main body 10 by the pin 44a, and the other end of the second link 45 is pivotally attached to the second step 42 by the pin 45a.

As shown in FIG. 4, when the step 40 constructed as described above is tilted (arrow D), the rotating arm 43 is rotated by the first link 44, and the rotating arm 43 is rotated. By the movement, the second step 42 expands and contracts with respect to the first step 41 via the second link 45 (arrow E), and the foot plate 5 provided on the seat 30 and the second step 42
Expands and contracts the interval with 0. That is, when step 40 is tilted upward, the distance between the seat 30 and the foot plate 50 increases. Note that, as shown in FIGS. 5 and 6, when the entire rotating arm 43 and the second link 45 are arranged so as to be accommodated in the lower side of the step 40, the respective members may protrude above the step 40. Therefore, the wheelchair 100 is convenient because it does not get in the way when the wheelchair 100 is moved up and down.

On the other hand, in this embodiment, a fixing device 60 such as a damper, which is expandable and contractable and has a fixed length, is provided below the seat 30, and both ends of the fixing device 60 are provided. At the end of the L-shaped arm 23 fixed to the back support 20 and the side of the front wheel 11 of the main body 10,
They are axially attached by connecting pins 61 and 62, respectively. The fixing device 60 can fix the tilted state of the back support 20. The handle 22 fixed to the backrest 20 is provided with a lever (not shown), and by operating this lever, the fixing device 60 is operated via a wire (not shown). is there. Therefore, the tilting operation of the backrest 20 can be easily operated by the caregiver behind the wheelchair 100. Incidentally, such a manual fixing device 60
However, the invention is not limited to this, and the backrest 20 may be electrically tilted to fix the tilted state by a retractable fixing device 60 that employs, for example, an electric jack.

Further, an armrest 15 which is supported so as to be able to move up and down is provided in a central portion of an upper portion of the main body 10.
If the wheelchair 100 is lowered, the whole wheelchair 100 can be compactly accommodated during transportation, and the user can easily get on and off the wheelchair 100 from the side. The armrest 15 and the like may be provided with the operation device of the fixing device 60 described above so that the user of the wheelchair 100 can also operate the fixing device 60.

As described above, in the present embodiment, step 40
Wheelchair 1 in which the tilt of the backrest 20 is interlocked with the tilt of the backrest 20
Although the example of 00 is shown, the wheelchair 100 of the present invention is not limited to this, and at least step 40 may be tilted.

[0019]

As described above in detail, in the wheelchair according to the present invention, when the step is tilted, the distance between the seat and the foot plate expands and contracts. Particularly, when the step is tilted upward, the seat and the foot plate move. The distance between the steps is extended, and even if the step is tilted upward, the foot plate does not push up the user's foot and the user can maintain a stable posture.

Therefore, according to the present invention, it is possible to provide a wheelchair in which a step can be tilted in a stable posture with a simple structure.

[Brief description of drawings]

FIG. 1 is a right side view showing an embodiment of a wheelchair according to the present invention.

FIG. 2 is a right side view showing a state in which the wheelchair shown in FIG. 1 is reclining.

FIG. 3 is an enlarged view of a main part of the wheelchair shown in FIG.

FIG. 4 is an enlarged view of a main part of the wheelchair shown in FIG.

FIG. 5 is an enlarged view of an essential part showing another embodiment of the wheelchair according to the present invention.

6 is an enlarged view of an essential part showing a state in which the wheelchair shown in FIG. 5 is reclining.

[Explanation of symbols]

 10 Main Body 11 Front Wheel 12 Rear Wheel 15 Armrest 20 Backrest 21 Backrest Pin 22 Handle 23 Arm 30 Seat 31 Seat Pin 32 Seat Pin 40 Step 41 First Step 42 Second Step 43 Rotating Arm 44 First Link 45 Second Link 46 step pin 47 connecting rod 48 connecting pin 49 connecting pin 50 foot plate 60 fixing device 61 connecting pin 62 connecting pin 100 wheelchair

Claims (1)

[Claims] 1. A main body to which front and rear wheels are axially attached, a back support arranged on the rear wheel side of the main body, a step having a foot plate and arranged on the front wheel side of the main body, A wheelchair having a seat disposed between the step and the backrest and supporting the step in a tiltable manner on the seat, wherein the step includes a first step supported by the seat and a first step of the first step. A second step in which the foot plate is provided at the lower part so as to be extendable and contractible, and a rotary arm rotatably supported in the first step; one end of the rotary arm; A first link having both ends axially attached to each of the main body, and a second link having both ends axially attached to each of the other end of the rotating arm and the second step. The characteristic wheelchair.