JP3060858U - Wheelchair with stand-up assist mechanism - Google Patents

Abstract

(57) [Summary] [Problem] To be able to stand up on its own, to easily get on and off, and to be easily used. A swing frame (30) is provided in addition to an L-shaped frame (10). The swing frame 30 constitutes a four-link mechanism, and when going down, the seat portion 51 is inclined forward and upward. This is driven by the telescopic device 60.

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheelchair with a stand-up assist mechanism, and more particularly to a wheelchair having a mechanism for assisting a person to easily get up from a seat.

[0002]

2. Description of the Related Art With the recent aging society, various wheelchairs have been actively improved, but no wheelchair has a mechanism for easily assisting the user to get up.

[0003]

[Problem to be Solved by the Invention] An object of the invention is to provide a wheelchair that can stand up by itself, easily get on and off, and can be used easily.

[0004]

Means for Solving the Problems A solution of the present invention is a wheelchair having an L-shaped frame having a rear frame portion 10 slightly inclined rearward, wherein a left and right inner sides of a horizontal frame portion 11 of the L-shaped frame are provided. The rear end of the lower link 40 extending forward along the front is pivotally connected to the lower end A of the rear frame 10, and the rear end of the upper link 20 extending slightly inclined forward and downward is connected to the rear frame 10 B. The lower end of the inverted L-shaped oscillating frame 30 is pivotally attached to the lower end of the lower link 40 at the front end D, and the middle of the leg 31 is pivotally attached to the upper end 20 of the front link C. The upper link 20, the leg 31, and the lower link 40 constitute a four-link mechanism. The seat 51 and the backrest 52 are fixed to the upper side of the swing frame 30 extending rearward from the upper end of the leg 31. Between the horizontal frame part 11 and the arm part on the telescopic device 60 This is a wheelchair with a stand-up assist mechanism characterized by pivoting the lower ends.

In particular, the length ratio of the four-link mechanism constituted by the rear frame portion 10, the upper link 20, the leg portion 31, and the lower link 40 is approximately 14: 35: 6: 31.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 8 show a wheelchair according to an embodiment of the present invention.

Referring to FIGS. 3 to 6 showing an L-shaped frame, a hand push handle 17 held by a caregiver, a rear frame portion 10 connected thereto, and rear wheels on the left and right of the rear frame portion 10 are shown. 16, a horizontal frame 11 connected to the lower end of the rear frame 10, left and right front wheels 12 mounted on the front end of the horizontal frame 11, and one end of a telescopic device 60 mounted on the horizontal frame 11. And

The telescopic device 60 is a manual hydraulic device, an electric power cylinder, or the like. In the case of an electric power cylinder, it is driven by a battery (not shown) as a power supply for supplying it.

The horizontal frame 11 also includes at least one pair of horizontal frames for connecting the left and right horizontal frames 11 to each other.

[0010] The L-shaped frame is a frame that is mechanically fixed except for the front wheel 12 and the rear wheel 16 that are pivotally connected.

Referring to FIGS. 1, 2, and 3 showing the swing frame 30 rotatably connected to the L-shaped frame at the fulcrums A and B, a pair of lower links 40 and a pair of upper links 20 are shown. Rotate around fulcrums A and B, respectively. The leg 31 and the upper link 20 are pivotally connected at a fulcrum C, and the leg 31 and the lower link 40 are pivotally connected at a fulcrum D. That is, the fulcrums A, B, C, and D are all pivotally connected. For this reason, the lower link 40 and the upper link 20 rotate while keeping the gap at the front end, that is, between the fulcrums CD, constant.

The upper end of the leg 31 is inclined forward, and then moves to the arm. A seat 51 and a backrest 52 are fixed to the upper part of the arm.

The telescopic device 60 is interposed between the arm or seat 51 and the horizontal frame 11. When the telescopic device 60 is extended, the four-link mechanism including the rear frame, the upper link 20, the leg 31, and the lower link 40 is operated, and the seat 51 and the backrest as shown in FIGS. 52 rises upward, moves forward, and leans forward. For this reason, the person sitting on the seat portion 51 can easily get off the car. When the user sits in a car, the telescopic device 60 is contracted and moved in the opposite direction, thereby making it easier to ride. The expansion and contraction device 60 may be a manual fluid pressure jack type or, in the case of an electric wheelchair, an electric fluid pressure type.

The ratio of the lengths AB, BC, CD, DA of the four-link mechanism constituted by the rear frame, the upper link 20, the leg 31, and the lower link 40 is approximately 14: 35: 6: 31 is preferred.

In the above description of the embodiment, parts common to the related art, such as a step for putting a foot, a safety lever, and an operation switch, are not shown and omitted.

[0016]

[Effects of the Invention] As described above, according to the present invention, since the seat can be moved manually or electrically, even those who cannot stand up on their own can stand up without any assistance, so that the independence of life can be expanded.

[Brief description of the drawings]

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

FIG. 2 is a plan view showing the wheelchair according to the embodiment of the present invention.

FIG. 3 is a front view showing the wheelchair according to the embodiment of the present invention.

FIG. 4 is a side view showing the L-shaped frame according to the embodiment of the present invention;

FIG. 5 is a plan view showing the L-shaped frame according to the embodiment of the present invention;

FIG. 6 is a rear view showing the L-shaped frame according to the embodiment of the present invention;

FIG. 7 is a side view showing a state before the swing frame according to the embodiment of the present invention is pulled up.

FIG. 8 is a side view showing a state in which the swing frame according to the embodiment of the present invention is pulled up.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 rear frame portion 11 horizontal frame portion 12 front wheel 16 rear wheel 17 hand push handle 20 upper link 30 swing frame 31 swing frame leg 40 lower link 51 seat 52 backrest 60 telescopic device A pivot point B pivot Attached fulcrum C A pivoted fulcrum D A pivoted fulcrum

Claims (2)

[Utility model registration claims] 1. A wheelchair having an L-shaped frame slightly inclined backward, comprising: a lower link (40) extending forward along left and right inner sides of a horizontal frame portion (11) of the L-shaped frame; The upper link (2) that extends slightly downward
0) The rear ends of the lower frame (30) are pivotally connected to the rear frame (10), respectively, and the lower end of the forwardly inclined leg (31) of the inverted L-shaped swinging frame (30) is pivotally connected to the front end of the lower link (40). Department (3
1) The middle part is pivotally connected to the front end of the upper link (20), and the rear frame (10), the upper link (20), the leg (31), and the lower link (40) constitute a four-link mechanism. A swing frame (3) extending rearward from the upper end of the leg (31).
The seat (51) and the backrest (52) are fixed on the upper side of (0), and the upper and lower ends of the telescopic device (60) are pivotally mounted between the horizontal frame (11) and the swing frame (30). A wheelchair with a stand-up assist mechanism characterized by the following. 2. A rear frame (10), an upper link (20),
2. The wheelchair with a stand-up assist mechanism according to claim 1, wherein the length ratio of the four-link mechanism constituted by the legs (31) and the lower link (40) is approximately 14: 35: 6: 31.