JP2001128787A - Lumber-supporting device of chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an improved seating feeling by easily adjusting a lumber support being fitted to front of back to an arbitrary height and stable gear- locking the fixing of the lumber support to the back. SOLUTION: In the lumber-supporting device of a chair where a lumber support 1 that is brought into contact with the waist part of a seated person is fitted to the front of a back 12 so that it can moved up and down, a holding piece 7 is formed at the rear side of the back 13 from an edge part at the left and right sides of the lumber support 1 so that it can be folded, and an operation grip 9 for expanding the folded part of the holding piece 7 is extended from the holding piece 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lumbar support device for a chair, and more particularly to a lumbar support that can freely adjust a set height position of a lumbar support, and easily and stably fixes the adjusted position. Lumbar support device.

[0002]

2. Description of the Related Art Adjusting the height of a mounting position of a lumbar support is disclosed, for example, in Japanese Patent Laid-Open No. 10-2110.
No. 51, for example. According to the present invention, the lumbar support is provided at its left and right ends with engaging means comprising inward tongues which engage with the left and right sides of the backrest.

[0003]

However, in the above-described method, a large force is required for releasing the engaging means, and it is difficult to adjust the height of the lumbar support while sitting on a chair. There is. SUMMARY OF THE INVENTION It is an object of the present invention to provide a lumbar support device in which the releasing operation of the engaging means is easy and the height position of the lumbar support can be easily adjusted while sitting on a chair.

[0004]

According to the present invention, the above-mentioned problem is solved as follows.

(1) In a lumbar support device for a chair in which a lumbar support for abutting against the abdomen of a occupant is mounted on the front of the backrest so as to be movable up and down, the backside of the backrest is located at the left and right ends of the lumbar support. The operating handle for expanding the folded portion of the holding piece is extended from the holding piece.

(2) In the above item (1), an engaging means which is fitted and locked to each other is provided on a surface of the holding piece facing the back of the backrest and on the back of the backrest. Are provided with engaging means at a plurality of positions in the vertical direction so that the position of the lumbar support in the vertical direction can be adjusted.

(3) In the above item (2), as the engaging means, a large number of convex locking portions are provided on the back face of the backrest in the vertical direction, and the holding piece is provided on the surface of the holding piece facing the back face of the backrest. A hole or a concave portion for fitting and locking the convex locking portion is provided.

(4) In any of the above items (1) to (3), the lumbar support to be brought into contact with the waist of the seat is suspended from the side ends of the left and right holding pieces on the front surface of the backrest. Provided below via a suspension arm.

(5) In the above item (4), the suspension arm is provided with a flexible portion which can be elastically bent in the front-rear direction.

[0010]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a lumbar support,
FIG. 2 is a rear view thereof.

A horizontally long band-shaped main body of the lumbar support (1).
(2) is gently curved backward in the longitudinal direction,
A bulge (3) is formed at the center of the front surface.

At the left and right ends of the main body (2), strip-shaped suspension arms (4) extending obliquely upward and outward are respectively extended.
A corrugated flexible part (5) is formed in the middle part of (4).

A support part (6) extending horizontally outward is formed at the upper and outer ends of the suspension arm (4), and the tip is folded back inward to form a holding piece (7). Have been.

The size of the gap (8) between the support portion (6) and the holding piece (7) is set so that the side end of the backrest (12) of the chair described later can be clamped. Approximately adapted to the thickness of the side edge.

An operation handle (9) is formed at the outer end of the left and right holding pieces (7) outwardly in parallel with the holding piece (7). A reinforcing flange (10) is provided between the handles (9). The holding piece (7) is formed with an engaging means comprising a horizontally long through hole (11).

FIG. 3 is a rear view of the backrest (12). The backrest (12) is a substrate made of metal or synthetic resin, has a mesh (13) penetrating back and forth, and is provided with a bent portion (14) at substantially the center in the vertical direction at the left and right ends. At the upper and lower ends, mounting portions (15) for supporting rods are provided.

The backrest (12) is, as shown in FIG.
The waist protrudes forward, and the lower end and the upper end are curved rearward, forming a substantially forward-looking shape in side view.

As shown in FIG. 3, on the rear surface of the backrest (12), a plurality of horizontally long convex engaging portions (16) are provided at left and right ends at positions corresponding to the height of the waist of the seated person. Engaging means consisting of
They are arranged vertically at predetermined intervals. The convex engaging portion (16) is a holding piece of the lumbar support (1).
It can be engaged with the through hole (11) which is an engagement means provided in (7).

FIG. 4 is an enlarged sectional view taken along line AA in FIG. The convex engaging portion (16) is engaged with the through hole (11), the lumbar support (1) is fixed, and movement in the vertical and horizontal directions and in the front and rear directions is regulated.

In FIG. 4, when the front end of the operation handle 9 is gripped and pulled forward (indicated by an arrow B), the holding piece 7 integrally connected via the reinforcing flange 10 is moved. Since the leading end opens rearward (indicated by arrow C) and the gap (8) increases, the convex engaging portion (16) is pulled out from the through hole (11), and the engagement of both engaging means is released. The lumbar support (1) can be easily moved in the vertical direction.

The main body (2) of the lumbar support (1)
Is suspended below the operation handle (9) by almost the length of the hanging arm (4), so that the operation handle (9) can be seated even when the main body (2) is positioned lower. It can be set to a position that is easy to handle with the hands of the person.

Since a flexible portion (5) is formed on the hanging arm (4), when the flexible portion (5) is bent,
The main body (2) is adapted to the curved portion of the backrest (12),
You can slide.

For example, as shown in FIG. 5, even when the main body (2) of the lumbar support (1) is located below the V-shaped curved portion of the backrest (12), the main body (2) can be used. , Backrest (12)
Is pressed by the cushion (17) arranged in front of the
The flexible portion (5) of (4) is curved, and the main body (2) can slide while always in contact with the surface of the backrest (12).

The present invention is not limited to the above-described embodiment, and the design can be appropriately changed according to the purpose. For example, the engaging means of the holding piece (7) of the lumbar support (1) may be a wavy recess instead of the through hole, and the engaging means of the holding piece (7) and the back of the backrest are opposed to each other. It may have a tooth shape.

[0025]

The present invention configured as described above has the following excellent effects.

According to the first aspect of the present invention, the lumbar support can be easily moved in the vertical direction by expanding the holding piece by the operating handle. Adjustment of the height position is extremely easy. Further, it is possible to easily adjust the height while confirming how the lumbar support hits the waist while keeping the sitting posture. Further, since the left and right holding portions of the lumbar support sandwich the left and right ends of the backrest, the lumbar support is prevented from wobbling in the front-rear and left-right directions.

According to the second aspect of the present invention, since the plurality of engaging means formed on the back surface of the backrest are formed in a vertical direction, the set height of the lumbar support can be adjusted in small increments.

According to the third aspect of the invention, the lumbar support can be easily and reliably locked and fixed to the backrest at a desired height position.

According to the fourth aspect of the present invention, by setting the suspension arm to an appropriate length, even when the height position of the main body of the lumbar support is low, the operation handle can be set to a height that can be easily operated by a seated person. Can be located.

According to the fifth aspect of the present invention, the main body of the lumbar support can always be moved up and down along the surface of the backrest, even with respect to the curved backrest.
A stable seating feeling can be obtained.

[Brief description of the drawings]

FIG. 1 is a plan view of a lumbar support.

FIG. 2 is a rear view of the lumbar support.

FIG. 3 is a rear view of the backrest.

FIG. 4 is an enlarged sectional view taken along line AA in FIG. 3;

FIG. 5 is a side view of the backrest and the lumbar support.

[Explanation of symbols]

 (1) Lumbar support (2) Main body (3) Swelling part (4) Hanging arm (5) Flexible part (6) Support part (7) Holding piece (8) Gap (9) Operation handle (10) Reinforcing flange (11) Through hole (12) Backrest (13) Mesh (14) Bend (15) Mounting (16) Engagement (17) Cushion

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[Procedure amendment]

[Submission date] December 6, 2000 (200.12.
6)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction contents]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lumbar support device for a chair, and more particularly to a lumbar support that can freely adjust a set height position of a lumbar support, and easily and stably fixes the adjusted position. about Lula emissions <br/> bar support device can in be.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

[0005] (1) on the front of the backrest, the lumbar support to abut the waist portion of the seat's in lumbar support device vertically movably mounted to the chair, the back of the backrest from the left and right side end portions of the lumbar support The holding piece is folded back to the side, and an operation handle for expanding the folded portion of the holding piece is extended from the holding piece.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

(4) In any one of the above items (1) to (3) , the lumbar support to be brought into contact with the waist of the occupant may be provided on the back of the left and right holding pieces from the side ends. It is provided below via a hanging arm suspended from the front of the back.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Masato Kadomichi 2-7-1, Kitako, Nishi-ku, Yokohama-shi F-term in Okamura Manufacturing Co., Ltd. (Reference) 3B084 HA06

Claims (5)

[Claims] 1. A lumbar support device for a chair in which a lumbar support for abutting against the abdomen of a occupant is mounted on the front of the backrest so as to be movable up and down. A lumbar support device for a chair, wherein an operation handle for folding back a holding piece and expanding a folded portion of the holding piece is extended from the holding piece. 2. An engaging means that is fitted and locked to each other on a surface of the holding piece facing the backrest and on a backside of the backrest, and a plurality of vertical portions are provided on the backside of the backrest. 2. The lumbar support device for a chair according to claim 1, wherein an engagement means is provided on the lumbar support so that the vertical position of the lumbar support can be adjusted. 3. As the engaging means, a large number of convex locking portions are provided on the back surface of the backrest in the vertical direction, and the convex locking portions are fitted on surfaces of the holding pieces facing the back surface of the backrest. 3. The lumbar support device for a chair according to claim 2, wherein a hole or a concave portion for locking is provided. 4. A lumbar support, which abuts against the waist of the seat, is provided below the side ends of the left and right holding pieces via hanging arms suspended from the front surface of the backrest. A lumbar support device for the chair according to claim 1. 5. The lumbar support device for a chair according to claim 4, wherein the suspension arm is provided with a flexible portion capable of elastically bending in the front-rear direction.