JPH07323047A - Electric chair - Google Patents

Abstract

PURPOSE:To place a front end part of an electric chair ahead of a step in the lowering thereof to the lowest position and behind the step in the lifting thereof only with the lifting or lowering thereof. CONSTITUTION:This electric chair is made up of a rear wheel 1 driven with an electric motor M, front wheels 2 ahead of the rear wheel 1, a step 3 and a chair 4 which is lifted or lowered between the left and right front wheels 2 and the step 3. The chair 4 is located behind the step 3 in the lifting position and moved forward sticking out ahead of the step 3 in the lowest lowering position to approach a running floor surface or contact it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric chair whose wheels can be rotated and moved by driving an electric motor.
Mainly handicapped people can use it conveniently.

[0002]

2. Description of the Related Art Since an elevating chair moves up and down on the rear side of the step and between the left and right front wheels, the elevating position where the chair approaches or contacts the floor surface. However, since this front step interferes, the step was manually rotated to the left and right outside.

According to the present invention, when the chair is raised, the step is in the front position, and when the chair is lowered, the step is in the front position, and the rear position is the outer position when the chair is lifted up without raising or lowering the chair, without disturbing the sitting. It is to make it a state.

[0004]

According to the present invention, a rear wheel 1 driven by an electric motor M, a front wheel 2 and a step 3 in front of the rear wheel 1 and a front wheel 2 and a step 3 on the left and right sides are provided. The chair 4 is lifted up and down in the
A configuration of an electric chair characterized in that it is in a rear position of the step 3 in a raised position, and moves forward so as to project to a position in front of the step 3 in the lowest position to approach or come into contact with a running floor surface. And

[0005]

Operation and effects of the invention By driving the electric motor M, the rear wheel 1 can be electrically driven to move and the chair 4 can be moved up and down. During this movement, since the chair 4 is in a state of being raised upward in the rear part, step 3
Will be positioned in front of the left and right sides of the chair 4, and the feet can be placed on the upper surface of the step 3.

When the chair 4 is lowered to the front, the front end of the chair 4 is located in front of the steps 3 on both the left and right sides so that the chair 4 can approach or come into contact with the floor surface. In this way, the chair 4 only moves up and down with respect to the steps 3 on both the left and right sides so that it is at the rear position in the ascending position and is at the front position in the descending position, thus eliminating the step 3 entry and exit operations. Therefore, the configuration and the operation can be simplified.

When the auxiliary wheels 5 that can be operated up and down are provided near the front and rear of the front wheels 2 as in the embodiment, the front wheels 2 are moved by moving the auxiliary wheels 5 downward when traveling on a floor with a step. It can be levitated once and the running can be carried out smoothly.

In addition, the front wheel 2 while the traveling chair is running.
When the fall prevention rod 6 is located at the rear portion of the rear wheel 1 due to the floating of the vehicle or the downward movement of the auxiliary wheel 5 as described above, when the whole electric chair is tilted backward a large amount, this fall The floor support of the prevention rod 6 can prevent rearward falls.

[0009]

[Example] A pair of transmission motors M on both upper sides of a transmission case
And a battery for driving the motor M is arranged on the rear side. Axle shafts 8 are provided on both left and right sides of the lower portion of the transmission case 7, and are provided so as to be transmission-rotated by a motor M corresponding to the left and right through a reduction mechanism.
When driving straight, the left and right motors M are simultaneously driven in the same direction to rotate the left and right rear wheels 1 at the same time, and when turning or steering, the drive or rotation speed of only one motor M is adjusted. Then, steering or the like can be performed by the difference in rotation between the left and right rear wheels 1.

A front wheel frame 9 is projected from the lower part of a transmission case 7 constituting the chassis to the left and right sides of the front, and a steerable front wheel 2, a step 3 so as to cover the upper side thereof, and a vertical movement to the rear side thereof are possible. Each of the auxiliary wheels 5 and the like is arranged. The front wheel 2 is rotatable and rotatable in the direction, but may be configured to be remotely operable by an operation tool. Step 3 is located at the frontmost end and is fixed to the front wheel frame 9.

The auxiliary wheel 5 is vertically rotatable around a pin 11 with respect to a bracket on the front part of the front wheel frame 9 by a bell crank 10, and the bell crank 10 has a link 12, a bell crank 13, and a chair 41. It is interlocked so as to be vertically rotated by a lever 14 which is located on the side and is vertically rotated. Normally, the lever 14 is moved upward from the floor surface. However, the lever 14 is pulled up so that the auxiliary wheel 5 is moved to the floor surface. It can be operated to a position where the front wheel frame 9 and the front wheels 2 are lifted by pushing down.

At the rear portion of the rear wheel 1, an upper portion of the fall prevention rod 6 is pivotally supported 16 on a rear frame 15 which is integral with the transmission case 7.
This fall prevention rod 6 is attached to the bell crank 13 and the rod 17
When the auxiliary wheel 5 is pushed down by pulling up the lever 14 and pushing the auxiliary wheel 5, the fall prevention rod 6 can be projected rearward of the rear wheel 1.

When the chair 4 is moved to the upper rear side and the front wheels 2 and the like are levitated from the floor surface by the auxiliary wheels 5, the rear fall is supported by the fall prevention rod 6 on the rear floor surface. To do.

The chair 4 is composed of a seat 18 at the bottom, a backrest 19 on the rear side, elbow supports 20 on the left and right sides, and the like, and is integrally constructed by a chair frame 21. Chair frame 21, the front wheel frame 9 and the rear frame 15
A pair of left and right front links 22 and a rear link 23 provide a substantially parallel link between them and support structure that can be pivotally moved forward and backward to move up and down. Pivot 24 of these front and rear links 22, 23 for the chair frame 21
And 25, and a pivot 26 for the lower front wheel frame 9 and a pivot 27 for the rear frame 15.
The position related to and is deviated vertically, and the pivotal support portions 24 and 26 on the front link 22 side are set lower.

When the front link 22 and the rear link 23 are raised to the upper rear, the chair 4 moves up and moves rearward with respect to the chassis. At this time, the front end portion of the seat 18 is at the rear position with respect to step 3, and both feet can be placed on the upper surfaces of the left and right steps 3 while sitting on the seat 18.

When the front link 22 and the rear link 23 are tilted downward to the front, the seat 18 is positioned within the space between the front wheel 2, the auxiliary wheel 5, the step 2, and the front wheel frame 9 on both left and right sides, and the seat is moved. The lower surface of the seat 18 can be seated on the surface of the seat 18 in a state where the lower surface of the seat 18 approaches or contacts the floor surface and the legs are extended forward. At this time, the front end of the seat 18 is in a relational position projecting to the front side with respect to the left and right steps 3 and the front wheels 2. So sheet 1
Even if 8 descends, it does not hit or interfere with the table or the like located on the front side.

Links 22 and 23 to such chassis
The chair 4 which can be lifted and lowered through is wound by a wire 28. The wire 28 is wound around a pulley at the upper end of the transmission case 7, the front end is connected to the chair frame 21, and the chair 4 can be raised and lowered by winding and pulling back by a reel driven by a motor. Can be fixed and maintained at a height.

A control box 29 is provided on the lower side and an operation lever 30 is provided on the upper side of one of the left and right elbow receivers 20. By tilting the operating lever 30 in the front-rear direction, the electric motor M can be rotated forward and backward to move forward and backward. Further, by tilting the operation lever 30 to the left and right, the rotation of the electric motor M on the tilt side can be decelerated or stopped to perform steering or turning.

The chair 4 can be moved up and down by operating the operation switch 31 provided on the control box 29. The chair 4 is lowered by pushing the operation switch 31 downward, and raised by pushing it upward. Three
Reference numeral 2 is a wiring connecting the control box 29 and the motor M and the like.

A rack mechanism may be used in place of the links 22 and 23 mechanism. The electric motor M may be single, and a clutch mechanism, an actuating mechanism, and the like may be provided to raise and lower the left and right rear wheels 1 and further the chair 4 by winding the wire 28.

[Brief description of drawings]

FIG. 1 is a side view.

FIG. 2 is a side view showing the operating state thereof.

FIG. 3 is a perspective view.

[Explanation of symbols]

 1 Rear Wheel 2 Front Wheel 3 Step 4 Chair 5 Auxiliary Wheel 6 Fall Prevention Rod M Electric Motor

Claims (3)

[Claims] 1. A rear wheel 1 driven by an electric motor M, a front wheel 2 and a step 3 in front of the rear wheel 1, and a left and right front wheels 2 and a chair 4 which is raised and lowered between the steps 3. The chair 4 is in the rear position of the step 3 in the raised position, and moves forward so as to project to the front position of the step 3 in the lowest position to approach or come into contact with the running floor surface. And an electric chair. 2. The electric chair according to claim 1, wherein auxiliary wheels 5 that can be moved up and down are provided near the front and rear of the front wheel 2. 3. A fall prevention rod 6 which is located rearward of the rear wheel 1 and is interlocked with the downward movement of the auxiliary wheel 5 or fixed to the vehicle body to prevent backward fall of the chair. The electric chair according to claim 1 or claim 2.