JP2000139616A - Armrest device for chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust the positions of elbow covers according to the physical constitution of a seated person by providing the elbow covers slidingly displaceable nearly on the horizontal plane at the upper end sections of elbow frames erected on both sides of the seat section of a chair. SOLUTION: An armrest device 4 is provided with an elbow frame 5 erected on the side section of a seat section 1 and an elbow cover 6 supported by the elbow frame 5, and the elbow cover 6 is fitted to the upper end section of the elbow frame 5 movably laterally. The base section of the elbow frame 5 is fixed to the lower face of the seat section 1. When the elbow covers 6 of both the right and left armrest devices 4 are moved to the center side of the seat section 1, the interval between both the right and left elbow covers 6 is W1. When both the right and left elbow covers 6 are slidingly displaced to the outermost side, the interval between both elbow covers 6 is W2. The interval between both elbow covers 6 can be adjusted within a wide range from W1 to W2 according to the physical constitution of a seated person, particularly shoulder breadth, and a chair excellent in human engineering is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair and an armrest device for the chair, and more particularly to a chair armrest device capable of adjusting the distance between the elbow covers on both sides of the chair and adjusting the distance in the front-rear direction.

[0002]

2. Description of the Related Art Conventionally, as an armrest device for a chair, there is generally provided an armrest device having a structure in which an elbow cover is fixed to an upper end of an elbow frame provided on both right and left sides of a seat portion.

There is also provided an armrest device having a structure in which the vertical height of an elbow cover can be adjusted.

However, in the conventional armrest device, the elbow cover is fixed to the elbow frame or the height can be adjusted, and the distance between the left and right elbow covers can be adjusted according to the physique of the occupant, particularly the shoulder width. Nothing that could be done was provided.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide an ergonomically excellent chair and an elbow cover capable of adjusting the position of an elbow cover according to the physique of a seated occupant in view of the above situation. is there.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an elbow cover (elbow pad) which is slidable in a substantially horizontal plane on the upper end of an elbow frame provided on both sides of a chair. ) Is provided for the armrest device of the chair.

According to a second aspect of the present invention, in the armrest device, the elbow cover is slidably mounted on a support provided at an upper end of the elbow frame, and the elbow cover is provided between the support and the elbow cover. An urging means for urging the seat in the center direction is provided.

Further, as described in claim 3, after the position of the elbow cover with respect to the elbow frame is slid and adjusted, it is preferable to provide a lock means for maintaining the state.

According to the armrest device of the present invention, the elbow cover can be moved and adjusted in the left-right direction or the front-back direction according to the physique of the seated person.

According to the second aspect of the present invention, the elbow cover is always located inside by the elastic urging means, so that a person with a large physique sits down and puts his arm on the elbow cover, and puts the elbow cover outward. It is possible to move.

Further, according to the structure of the third aspect, the elbow cover can be securely held at the adjusted position, and there is no need to readjust when the same person sits.

[0011]

Next, an embodiment of the present invention will be described with reference to the accompanying drawings. 1 and 2 show a chair according to an embodiment of the present invention. In the drawings, reference numeral 1 denotes a seat, reference numeral 2 denotes a leg, reference numeral 3 denotes a backrest, and reference numeral 4 denotes an armrest device. I have.

The illustrated chair has a seat portion 1 supported by a leg portion 2 so as to be horizontally rotatable, and a backrest 3 disposed behind the seat portion 1.
The armchair device 4 is provided on both left and right sides of the seat 1. The armrest device 4 includes:
An elbow frame 5 erected on the side of the seat 1 and an elbow cover 6 supported by the elbow frame 5 are provided.
Is attached to the upper end of the elbow frame 5 so as to be movable left and right. The base of the elbow frame 5 is fixed to the lower surface of the seat 1.

As shown in FIG. 2, the left and right armrest devices 4,
In the state where the elbow covers 6 and 6 of No. 4 are moved to the center side of the seat 1, the distance between the left and right elbow covers 6 and 6 is W1, and the state where the left and right elbow covers 6 and 6 are slid outward is shifted. ,
The distance between the left and right elbow covers 6, 6 is W2, and the distance between the left and right elbow covers 6, 6 can be adjusted within the range of W1 to W2 according to the physique (particularly shoulder width) of the seated person.

Various known slide mechanisms can be used as the mechanism for slidingly moving the elbow cover 6 to the left and right with respect to the elbow frame 5, but in the present embodiment, as shown in FIGS. A support base 7 is formed at the upper end of the frame 5, and a guide rail 8 is formed on the support base 7, while a guide groove 9 in which the guide rail 8 fits is formed on a lower surface of the elbow cover 6, and these guides are formed. A mechanism for slidingly engaging the rail 8 and the guide groove 9 is employed.

The guide rail 8 formed on the support base 7 has a substantially T-shaped cross section, and the guide groove 9 formed on the elbow cover 6 has a concave groove shape in which the head of the guide rail 8 slides and engages. ing.

As shown in FIG. 4, the elbow cover 6 is attached to a support base 7.
The elbow cover 6 has a recess 11 into which the support 7 is fitted from below. In order to allow the elbow cover 6 to move left and right,
1 is set to a width dimension larger than the width dimension of the support base 7.

A guide rail 8 is formed at the upper end of the support 7, and the guide groove 9 is formed on the upper bottom surface of the recess 11. Needless to say, the guide rail 8 and the guide groove 9 extend in the left-right direction when the chair is viewed from the front.

Since the guide rail 8 of the support 7 is formed in a T-shaped cross section, a concave groove 10 is formed on the front and rear side surfaces of the guide rail 8. The front-rear width of the guide rail 8 is smaller than the front-rear width of the recess 11. For this reason, a space consisting of a recess 11 and a concave groove 10 of 8 is formed on both front and rear sides of the guide rail 8, and a tension coil spring 12 as elastic biasing means is provided in this space. I have.

The tension coil spring 12 extends in the left-right direction, and one end thereof is locked by a locking portion 13 protruding from an end of the support base 7 near the seat 1 in the concave groove 10. I have. The other end of the tension coil spring 12 is locked in a notch groove 11 of the elbow cover 6 and a locking portion 14 protruding from an outer end far from the seat. For this reason, the elbow cover 6 is urged by the elastic restoring force of the tension coil spring 12 so as to move toward the center of the seat portion 1 and become selfish.

FIG. 5 shows a lock mechanism 15 for maintaining the state after the elbow cover 6 is slid and adjusted.
An example is shown. This will be described below.

As a component of the lock mechanism 15, a plurality of engaging recesses 16 are formed on one side edge of the guide rail 8 extending in the longitudinal direction. A portion of the elbow cover 6 facing the engaging recess 16 of the guide rail 8 is formed in a hollow shape, and an operation button 17 that can be pushed by a person with a finger from outside the elbow cover 6 is formed in the hollow portion. Alternatively, an operation lever and a latch rod 18 that rotates in conjunction with the pressing operation of the operation button 17 are provided.

An end of the latch rod 18 opposite to the operation button 17 across the center of rotation is provided with the latch rod 18.
The engagement claw 19 is formed so as to be engaged with and disengaged from the engagement concave portion 16 by the rotation of. The operation button 1 is operated by the spring body 20.
7 is urged in the direction in which it protrudes forward, and the latch rod 18 is urged to a position in which it engages with the engagement recess 16.

In this embodiment, the operation button 17 and the operation rod 21 connected to the operation button 17 are slidably supported on the elbow cover 6, and the tip of the operation rod 21 is connected to a latch having an intermediate portion pivotally mounted. Pivotally supported at one end of the rod 18,
By fitting the spring body 20 formed of a compression coil spring, the operation button 17 protrudes, and the latch rod 18 is urged to engage with the engagement concave portion 16, so that the operation button 17 is freely used. When the spring body 20 is provided on the latch rod 18, a kick spring is used.

To adjust the lateral position of the elbow cover 6, the operation button 17 is depressed with a finger to release the engagement between the engaging claw 19 and the engaging concave portion 16, and in this state, the elasticity is reduced. The finger may be released from the operation button 17 after the elbow cover 6 is slid and adjusted against the elastic force of the urging means (tensile coil spring 12) or with the elastic force. Then
The engaging claw 19 of the latch rod 18 is engaged with the engaging recess 1 of the guide rail 8.
6 to maintain the elbow cover 6 in the adjusted position. Note that the lock mechanism 15 is not limited to the above-described embodiment, and various mechanisms can be adopted.

As shown in FIG. 6, the position of the elbow cover 6 can be adjusted in the front-rear direction according to the physique of the seated person. Normally, the elbow cover 6 is elastically biased to the rearmost position, and when used by a large-sized occupant, the elbow cover 6 is slid forward to a position most suitable for the occupant's physique. The elbow cover 6 is set. The adjustable stroke length of the elbow cover 6 is indicated by D in the figure. The mechanism for adjusting the front and rear of the elbow cover 6 can employ the same mechanism as described above, and a detailed description thereof will be omitted.

[0026]

According to the present invention, the elbow cover is slid in the lateral direction according to the physique of the occupant to adjust the distance between the elbow covers on both sides, thereby providing the most suitable elbow cover for the occupant. Position, while the elbow cover is slid in the front-rear direction, so that the front-rear position of the elbow cover can be optimally set according to the physique of the occupant, providing an ergonomic chair. .

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a chair according to an embodiment of the present invention.

FIG. 2 is a front view of the main part.

FIG. 3 is a vertical sectional side view of a main part showing a slide mechanism of an elbow cover.

FIG. 4 is a longitudinal sectional front view of a main part in the same manner.

FIG. 5 is a plan view of a main part of an example of a lock mechanism partially broken away.

FIG. 6 is a partial side view of a chair in which an elbow cover can be adjusted back and forth.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat part 2 Leg part 3 Backrest 4 Armrest device 5 Elbow frame 6 Elbow cover 7 Support stand 8 Guide rail 9 Guide groove 10 Depression groove 11 Depression 12 Tension coil spring (elastic biasing means) 13 Locking part (support stand) 14) Locking part (elbow cover side) 15 Lock mechanism 16 Engagement recess 17 Operation button 18 Latch rod 19 Engagement claw 20 Spring body 21 Operation rod

Claims (3)

[Claims] 1. An armrest device for a chair, wherein an elbow cover (elbow rest) is provided at an upper end of an elbow frame erected on both sides of a seat of the chair so as to be slidable in a substantially horizontal plane. 2. A support table provided at an upper end of the elbow frame,
2. The armrest device for a chair according to claim 1, wherein the elbow cover is slidably mounted on the left and right sides, and biasing means for biasing the elbow cover toward the center of the seat is provided between the support and the elbow cover. . 3. The armrest device for a chair according to claim 1, further comprising a lock means for maintaining the state of the elbow cover after sliding the position of the elbow cover with respect to the elbow frame.