JPH054817Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is an electric wheelchair for physically disabled people, specifically a bed in which the seat cushion (seat part) and the seat back (backrest part) can be formed on substantially the same plane. This invention relates to improvements to wheelchairs that can be used as wheelchairs.

(Prior Art and its Problems) A conventional wheelchair of this type has been disclosed that is equipped with a reclining device and can be used as a bed by folding the seat back backward.

However, with this wheelchair, even if the seat back falls backwards, the seat cushion remains fixed to the vehicle body.
Since the rear part of the seat cushion is installed at a lower angle than the front part, there is a problem in that the seating surfaces of the seat cushion and the seat back are not flush with each other.

Therefore, when this wheelchair is used as a bed, a difference in level occurs between the seat cushion and the seat back, resulting in a problem that greatly impairs usability.

Therefore, the object of the present invention is to improve usability as a bed by making the seat cushion also horizontal when the seat bag is folded backwards into a substantially horizontal position.

(Means to Solve the Problem) Therefore, in the wheelchair according to the present invention, the front side is rotatably pivoted to the vehicle body, and the rear side is pivotably attached to the vehicle body with respect to the front side. a cushion frame supported at a low position; a back frame connected to the vehicle body side by a reclining device; It consists of an arm that is installed.

Therefore, in order to make the cushion frame comfortable to sit on when normally used as a wheelchair, the rear side is supported on the vehicle body in a lower position than the front side, and when used as a bed, When the back frame is tilted back by the reclining device, the arm integrated with the back frame raises the rear side of the cushion frame as the back frame is tilted back, and the seat cushion and the seat back are pushed together. Make the surfaces coplanar.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

Fig. 1 shows a wheelchair according to the present invention, in which a is a seat cushion, the rear side of which is placed on the car body e, and the front side rotatably pivoted on the car body e so that the rear side can rise. When the front side is supported and the rear side is placed on the vehicle body e, the seat surface is formed higher than the rear side to provide good seating comfort when used as a wheelchair.

In the figure, b indicates a seat back, and this seat back b is connected to the vehicle body e by a reclining device, and armrests c and c are provided at the lower left and right of the lower part of the seat back b in the direction of the seat cushion a.
is installed.

Further, a footrest d is connected to the front part of the seat cushion a so as to be able to rise and fall, and this footrest d is not interlocked with the reclining device,
It has a structure in which it is operated by a single motor 5.

The above structure will be specifically explained with reference to FIG.

In the figure, reference numeral 1 indicates a bread-shaped (dish-shaped) cushion frame that constitutes the seat cushion a, and both front left and right sides of the cushion frame 1 are connected by shafts 15 to a pedestal frame 3 that constitutes the vehicle body e. It is pivotably mounted on the side. Further, the rear side of the cushion frame 1 is supported on the vehicle body e side at a lower position than the front side, and as described above, the seat surface is configured such that the front side is higher than the rear side.
In the figure, reference numeral 31 denotes a leg piece whose base end is welded to the base frame 3, and the cushion frame 1 is attached to the upper end of this leg piece 31 as described above. In the figure, 11, 12
1 represents a reinforcing rod of the cushion frame 1, and 13 and 14 represent the left and right side walls of the cushion frame 1, respectively.

The rear side of the cushion frame 1 is placed on a bracket (not shown) fixed to the rear leg piece 31'. Therefore, the rear side of the cushion frame 1 is attached so as to be able to be pushed upward about the shaft 15 on the front side as the center of rotation.

This pushing up of the rear side of the cushion frame 1 causes the back frame 2 constituting the seat back b to
This is done by the arms 21, 21 of.

The back frame 2 is connected by a reclining device mounted across both sides of its lower part and the leg piece 31' of the pedestal frame 3. 32 and an upper arm 23 fixed to the back frame 2 side are rotatably attached to each other with a shaft pin 23, and a motor 4 is provided on the back frame 2, and this motor 4 moves the back frame 2 in the front-rear direction. It was made so that it could be laid down.

Arms 21, 21 are provided on the left and right sides of the lower end of the back frame 2. This arm 2
As shown in FIG. 4, the ends of the cushion frames 1 and 21 extend below the rear bottom surface of the cushion frame 1, and when the back frame 2 is laid down approximately horizontally by the reclining device, the cushion frame 1 is Pushed up by the arms 21, 21, FIG.
As shown by the dotted chain line, the seat cushion a and the seat back b become substantially horizontal.

A support plate 53 constituting the footrest d is rotatably pivoted 52 to a mounting rod 33 fixed to the cushion frame 1 through a support shaft 51.
3 is equipped with a motor 5. Therefore, the support plate 53 is rotated by the motor 5 to move the footrest d from the state shown by the solid line in FIG. 3 to the state shown by the two-dot chain line. Therefore, since this footrest d rises and falls independently without interlocking with the reclining device, there is no need to provide an interlocking member such as a link below the cushion frame 1. Therefore,
There is no need for a space below the cushion frame 1 to arrange a link or the like, and the ease of assembling the wheelchair is improved.

(Effects) As described above, the present invention supports the rear part of the cushion frame in a swingable manner, and fixes the cushion frame to the back frame, so that when the back frame is tilted backward, the cushion frame It has an arm that pushes the rear part upwards. Therefore, in order to improve the comfort of sitting in a wheelchair,
If the rear side of the seat cushion is lower than the front side, and the seat cushion is used as a bed with the seat cushion in a substantially horizontal position at the rear, the rear side of the seat cushion will move upward as the seat cushion falls. It is pushed up and becomes horizontal like a seat back. Therefore, when the wheelchair is used as a bed, the seating surfaces of the seat cushion and the seat back are on the same plane, making it extremely usable as a bed. When used as a bed, the front side of the cushion frame is rotatably pivoted, so the height of the seat cushion does not move beyond the height of the seat surface on the front side. , the seat cushion itself does not move forward. Therefore, when the wheelchair is used as a bed or vice versa, the seating surface of the seat cushion does not change, which improves safety and prevents the buttocks from shifting.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a perspective view, FIG. 2 is a perspective view of the frame structure, FIG. 3 is an explanatory view showing the operating state, and FIG. 4 is a sectional view of the main parts. be. In the figure, 1 is a cushion frame, 2 is a back frame, 21, 21 are arms, a is a seat cushion, and b is a seat back.

Claims (1)

[Claims for Utility Model Registration] Shoes whose front part is rotatably pivoted to the vehicle body, and whose rear part is pivotably supported by the vehicle body at a lower position relative to the front part. A wheelchair comprising a cushion frame, a back frame connected to the vehicle body side by a reclining device, and an arm fixed to the lower end of the back frame and having a tip extending below the rear bottom surface of the cushion frame.