JPH10179644A - Standing assistant chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a standing assistant chair which assists in a user to stand up and can be used at any desired place by easily moving it. SOLUTION: This standing assistant chair has a back rest 5 provided above the legs 2, 3 at the back part of the chair and an arm rest 4 on each of the right/left sides. In addition, the seat part of the chair is split into a front seat part 6 which is short in depth and a back seat part 7 which is long in depth, and the front end lower part of the back seat part 7 is connected to the back end part of the front seat part 6 with a hinge 14. Further, the front end lower part of the back seat part 7 is connected to the leg side with a front link 8, and at the same time, the back end lower part of the back seat part 7 is connected to the leg side with a back link 16 to form parallel links. Besides, an intermediate part in the depth direction of the back seat part 7 is connected respectively to the back lower parts of the legs 3 each with a gas spring 19. When the gas spring 19 is stretched, the back seat part 7 is transferred almost parallel to ascend and, at the same time, the front of the front seat part 6 is caused to droop forward by its own weight.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a standing assisting chair for assisting a person or an elderly with a leg or waist disability to sit and stand up.

[0002]

2. Description of the Related Art Conventionally, there have been provided various standing assist chairs for assisting a person with a disability or the elderly who are difficult to stand on their own from a sitting posture. It is intended for people who can hardly stand on their own, and therefore the seat, the backrest, the armrests, etc., are all driven by electric mechanisms.

[0003]

Therefore, in the conventional assisting upright assisting chair, the structure of the chair is extremely large because it assists the user completely in the standing position, and the mechanism of the chair In addition to this, the power supply and other equipment will be installed, and the weight of the chair will be significantly increased, it will not be easy to move it, and it will be an inappropriate structure for a chair used everyday and it will be extremely expensive And could not be used easily.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an upright assisting chair which can assist a user to stand up with a simple structure and can be easily moved and used anywhere. As a solution, the present invention is a chair having a backrest at the rear upper part of the legs and armrests on the left and right, wherein the seat part has a short front seat part, and a rear seat part longer than this. The lower front end of the rear seat and the rear end of the front seat are connected by a bendable hinge, and the lower front end of the rear seat and the leg side are connected by a front link. The lower rear end of the rear seat portion and the leg side are connected by a rear link to form a parallel link, and the middle portion in the front-rear direction of the rear seat portion and the lower rear portion of the leg are connected by a gas spring. The rear seat moves almost parallel and rises when the gas spring is extended Lies in the so hangs forward by both front own weight undercard portion.

[0005] As a result, when seating, the front and rear seat portions are flat and can be seated in a stable posture.
When standing up from the sitting position, the rear seat follows and rises,
The leg portion is naturally guided in a downward direction by the forward inclination of the front seat portion, and is naturally converted into a standing posture and can easily stand up.

When the user sits down, the waist is supported by the back seat from the standing posture and is smoothly converted to the sitting posture by the action opposite to the above, so that no pain is given.

Further, if the connecting position between the gas spring and the rear seat portion is made variable and the reaction force by the gas spring is adjusted, the reaction force of the rear seat portion at the time of sitting according to the weight of the user. Can be selected in an optimal state.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings.

The chair body 1 has front and rear legs 2 and 3, left and right armrests 4 fixed between upper ends of the front and rear legs 2 and 3, and a backrest 5 extending above the rear legs 3. I have.

The seat comprises a front seat 6 having a shorter depth and a rear seat 7 having a longer depth than the front seat 6. The lower rear end of the front seat 6 and the lower front end of the rear seat 7 are hinged to each other. Are flexibly connected to each other.

At the front position between the cross beams 13a, 13a of the beam member 13 fixed at a substantially intermediate height position between the front and rear legs 2, 3 of the chair body 1, a rigid bearing member 9 having a rectangular cross section and a large rigidity is fixed. The lower end of the front link 8 is provided at the front end of the bearing member 9.
The lower end of a rear link 16 is pivotally supported by a shaft 17 at the rear end of the bearing member 9.

The upper end of the front link 8 is pivotally connected by a shaft 12 to a bearing portion 11 below the front end of the rear seat portion 7, and the rear link 16
The upper end of the front link 8 is pivotally connected to a bearing 15 at the lower rear end of the rear seat 7 by a shaft 18, and the front link 8 and the rear link 16 constitute a substantially parallel link. The lower surface on the tip end side of the front seat portion 6 is supported in contact with the upper surface of the front link 8.

One end of a gas spring 19 is pivotally connected by a shaft 20 to the lower center between the left and right rear legs 3, and the other end is located at the center of the rear seat portion 7 in the width direction and at an intermediate position between the lower front end and the rear end. The slide guide 21 is fixed to one of the engaging portions 22 formed of a concave portion formed on the upper edge of the fixed slide guide 21.

That is, the slide guide 21 is provided with a large number of engaging portions 22 for receiving a force point, which is the other end portion of the gas spring 19, in the longitudinal direction. The gas spring 19
Is slightly stretched, the push-up force is weakened by the change of the power point, and it is suitable for a lightweight person. If it is set backward as shown in FIG. 3, the gas spring 19 is in a shortened state, and the push-up force is changed by the change of the power point. It becomes stronger and is more suitable for heavy people. Therefore, by selecting the position of the engaging portion 22 in accordance with the weight of the user, a lifting force suitable for the user can be obtained.

The gas spring 19 is extended by the armrest 4.
By operating a lever 23 provided on the lower side of the front end, the lock is controlled as is well known.

Next, the operation will be described.

First, in the seated state, as shown in FIG. 1, the rear seat 7 is positioned without a step behind the front seat 6, and both of them are kept in a horizontal posture. Similarly, the user can be seated, and when the user does not need the assist for standing up, the user can rise from the seated state to the standing state without operating the lever 23. In this seated state, the front and rear links 8, 16 are both in a horizontal state.

When the occupant needs to stand up and stand up with the feet on the floor and need assistance in standing up, simultaneously grasp the tip of the left and right armrests 4 and 4 and the lever 23, and
Is operated, the valve of the gas spring 19 is unlocked, and the gas spring 19 is extended as shown in FIG. 2 and the rear seat portion 7 is slightly raised forward so as to follow the standing of a seated person. Let it.

With this rise, the rear link 16 rotates so as to rise with the shaft 17 as a fulcrum. However, since the rear link 16 and the front link 8 are in a parallel link relationship, the front link 8 is also connected to the rear link 16. It rises in conjunction with it.

For this reason, the front seat 6 above the front link 8
Is bent about the hinge 14 at the front end of the rear seat 7 and leans forward so as not to hinder the natural standing posture of a person standing up. If the lever 23 is released, it is fixed at that position, so that it is possible to return to the standing operation from that position.

When the user sits down again, the posture is changed from the upright posture to the sitting posture smoothly by the operation opposite to the above. That is, when the lever 23 is operated, the lock of the valve of the gas spring 19 is released, so that the gas spring 19 sequentially contracts according to the weight received when the user sits down on the rear seat portion 7, and the chair main body 1 becomes as shown in FIG. Therefore, the user can sequentially return from the state of sitting on the chair body 1 to the seated posture, but no pain is given to the user in this process.

In the case of FIGS. 3 and 4, standing and sitting can be performed by the same operation as described above, but as shown in FIG.
By locking the upper end of the gasket 9 to the rear engaging portion 22, the reaction force when the lock of the gas spring 19 is released increases, so that even a person with a large weight can sit smoothly.

[0023]

Since the present invention is constructed as described above, the following effects can be obtained.

1) Since it is a structure in which a mechanism for assisting standing up is assembled to a conventional chair serving as a base, it can be provided simply and inexpensively.

2) Like a conventional chair, it can be easily moved and used anywhere.

3) According to the second aspect, the connecting position between the rear seat portion and the gas spring is made variable in the front-rear direction.
The reaction force at the time of sitting can be optimally adjusted according to the weight of the user.

[Brief description of the drawings]

FIG. 1 is a side view showing a state in which a standing assistance chair according to the present invention is seated.

FIG. 2 is a side view showing a state where the state of FIG.

FIG. 3 is a side view showing a state in which an upper end position of the gas spring is moved rearward so as to be adapted to a person having a large weight.

FIG. 4 is a side view showing a state changed to a standing state.

FIG. 5 is a half plan view of a chair with a seat removed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Chair main body 2 Front leg 3 Rear leg 4 Armrest 5 Backrest 6 Front seat part 7 Rear seat part 8 Front link 16 Rear link 19 Gas spring 21 Slide guide 22 Engagement part 23 Lever

Claims (2)

[Claims] 1. A chair having a backrest at an upper rear portion of a leg and armrests at right and left sides, wherein a seat portion is divided into a front seat portion having a shorter depth and a rear seat portion having a longer depth. A lower front end of the rear seat portion and a rear end portion of the front seat portion are connected by a bendable hinge, and a lower front end of the rear seat portion and a leg side are connected by a front link; The lower end and the leg side are connected by a rear link to form a parallel link, and the middle portion in the front-rear direction of the rear seat portion and the lower rear portion of the leg are connected by a gas spring. An upright assisting chair characterized in that the seat portion moves substantially parallel and rises, and the front portion of the front seat portion hangs forward by its own weight. 2. The upright assisting chair according to claim 1, wherein the connecting position between the rear seat portion and the gas spring is variable in the front-rear direction, and the reaction force of the gas spring is adjustable.