JP2766432B2 - Chair with armrests - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved chair provided with an armrest.

[0002]

2. Description of the Related Art It is well known that a chair is provided with an armrest on which the left and right elbows of a person can be placed above both right and left sides of a seat body. As it is, conventionally, the elbow pad is fixed to the seat body,
The height from the upper surface of the seat to the upper surface of the elbow rest is constant. However, in general, a large person has a high sitting height, so the height from the upper surface of the sitting body to the elbow is high when sitting on a chair, while a small person has a low sitting height, so the sitting body is sitting on a chair. It is thought that the height from the upper surface to the elbow will also be lower, and the height from the upper surface of the seat to the elbow will differ depending on the physique of the person, so in a chair with a constant height of the elbow rest as before,
If the physique of the person sitting on the chair is different, the elbow may float from the elbow rest, or on the other hand the elbow may be stretched against the elbow rest, giving a comfortable sitting comfort regardless of the physique There was a problem that it could not be done.

An object of the present invention is to provide a chair that solves this problem.

[0004]

In order to achieve this object, a chair according to the present invention comprises a seat and a movable elbow rest which can be moved up and down or tilted with respect to the seat. The body and the armrest are linked via the interlocking means such that the armrest moves according to the magnitude of the downward load on the seat body.

[0005]

The operation and effect of the present invention will be described below.
The height of the elbow rest increases when a large and heavy person sits, and the height of the elbow rest decreases when a small and light person sits. The height and the like can be automatically adjusted so as to move up and down in proportion to the size of the weight of the person sitting on the chair.

Therefore, according to the present invention, the height of the armrest can be automatically adjusted to substantially match the position of the elbow of the person sitting on the chair, so that no special adjustment work is required. This has the effect that comfortable sitting comfort can be given to individuals of different physiques.

[0007]

Next, an embodiment of the present invention will be described with reference to the drawings on the assumption that the height from the seat to the elbow increases as the physique of a person increases. In the figure, reference numeral 1 denotes a pillar of a chair, reference numeral 2 denotes a seat, reference numeral 3 denotes a backrest, and elbow pads 4, 4 extending in the front-rear direction are disposed above both right and left sides of the seat 2, respectively. doing.

A support frame 5 having an upward opening is fitted on the upper end of the pillar 1, and a base plate 6 is mounted on the upper end of the support frame 5.
Is fixed, and the seat body 2 is supported by four front and rear, right and left weight-applied springs 7 placed on the base plate 6, so that the seat body 2 can be adjusted to the magnitude of the downward load on the seat body 2. It is configured to descend by a corresponding amount. A reinforcing plate 8 is fixed to the lower surface of the seat 2.

An L-shaped upward bracket 9 as viewed from the front is provided upright at both front and rear ends of the left and right sides of the base plate 6, and a link body 10 as an example of an interlocking means is provided at the upper end of each upward bracket 9. The left and right approximately halfway portions are pivotally connected with the left and right one by one first pins 11, and one end of each link body 10 is
The left and right second pins 13 pivotally attach to the downward brackets 12 formed by bending the side edges of the reinforcing plate 8 of the seat body 2, while the other end of each link body 10 is connected to the elbow rest 4. The front and rear foot pieces 14 projecting downward from
It is pivotally connected by the third pin 15 for each book.

Further, a guide pin 16 extending in the front-rear direction is mounted between the outer ends of the front-rear upward brackets 9, 9 on the base plate 6, and the front and rear ends of the guide pin 16 are connected to the front and rear feet of the armrest 4. The upper and lower elongated holes 17 formed in the piece 14 are fitted and inserted. Note that the armrest 4 may be configured to be able to tilt in the front-rear direction. In the above configuration, when a person sits on a chair, as shown in FIG. 6, the seat body 2 moves downward against the weight-applied spring 7, and each link body 10 moves as the seat body 2 moves downward. Are simultaneously rotated about the first pin 11, so that the left and right elbow rests 4, 4 simultaneously rise by an amount proportional to the descending amount of the seat 2.

In this case, since the spring constant of the body weight application spring 7 is constant, the descending amount of the seat body 2 increases in accordance with the weight of the person sitting on the chair. It increases in proportion to the weight of the person sitting on the chair. On the other hand, when a large, high sitting person is generally seated on a chair, the height from the upper surface of the sitting body 2 to the person's elbow is high, and when a small, low sitting person is seated on the chair, Although the height from the upper surface of the seat body 2 to the elbow of the person is considered to be low,
In general, large and tall people are heavy, and small and short people are light in weight. Therefore, when a large person sits on a chair, the height of the elbow rest 4 is high and small people If the person sits on a chair, the height of the elbow rest 4 will be low, so even if the physique of the person sitting on the chair is different,
Is automatically adjusted to match the height of the person's elbow.

Note that the seat 2 is lowered by the person sitting thereon, and the relative height between the seat 2 and the elbow rest 4 also changes depending on the person sitting on the chair. The relationship between the amount of descent and the height of the armrest 4 is set to a ratio that takes into account the difference in the relative height between the seat body 2 and the armrest 4 due to a person sitting on a chair. By the way, it is conceivable that the height from the sitting body 2 to the elbow decreases when the physique increases because the height of the arm increases as the height increases. The elbow pad 4 may be configured to descend in proportion to the magnitude of the load.

Further, the seat body 2 is configured to tilt backward in proportion to the weight of a person.
In order to increase the elastic resistance of the spring means against the backward tilting of the backrest 3, in this case, the elbow rest 4 is configured to be able to tilt backward and the elbow rest 4 is interlocked with the backward tilting of the seat 2.
May be configured to tilt backward. Further, since a person tends to have a larger shoulder width as the size becomes larger, the left and right elbow supports 4, 4 are configured so as to increase the distance between each other, and the left and right elbow rests 4, 4 are increased in proportion to the magnitude of the load on the seat body 2. Elbow rest 4,
The space between the left and right elbow supports 4 and 4 and the vertical movement may both be linked to the magnitude of the load on the seat 2.

The above embodiment relates to the case where the lowering of the seat body and the vertical movement of the elbow rest are related, but the downward load on the seat body is raised, for example, the elbow rest is raised in conjunction with the backward tilt of the seat body. It is also possible to associate the other amount of displacement that changes with the vertical movement of the elbow rest, or the like. Further, it goes without saying that the interlocking means is not limited to the link body as in the embodiment, but may employ another structure such as pulling by a wire.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a part of an interlocking means.

FIG. 2 is a perspective view of a chair.

FIG. 3 is a sectional view taken along line III-III of FIG. 2;

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is a sectional view taken along line VV of FIG. 3;

FIG. 6 is a diagram showing an operation state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pillar 2 Seat 3 Backrest 4 Elbow rest 7 Weight application spring 10 Link body as an example of interlocking means

Claims (1)

(57) [Claims] 1. A seat and a movable elbow rest which can be moved up and down or tilted with respect to the seat, and the seat and the elbow rest are moved in accordance with the magnitude of a downward load on the seat. A chair with an armrest, characterized in that the armrest is linked via interlocking means to move.