JPH10211049A - Backrest of chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a height adjustable lumbar support to be respectably fit on, by tensely equipping an outer leather material on a gap on the front face of a backrest main body and inserting and keeping a lumbar support facing right and left directions into the gap. SOLUTION: This backrest main body of a chair is made by wrapping a surface leather material around a cushion body, and a gap is formed on the front face to tensely equip an outer leather material 5. Vertical notch parts are equipped on the right and left side edges of the outer leather material 5 and a beading 7 is set on the inner edge of the notch part. A laterally long plate-like lumbar support 8 made of synthetic resin is inserted into the gap. The lumbar support 8 is overlapped on the front face of the outer leather material 5 by positioning upper and lower engaging hole 15, 16 of a groove hole 12 onto the rear face of beading 7 and elastically bending an inward facing tongue 13. Thereby one engaging hole 16 on the inward facing tongue 13 side among the engaging holes 15, 16 is fit and engaged with the front face of the beading 7 and the other one 15 on the main body 10 side with the rear face to prevent unwilling movement of the lumbar support 8 in the vertical and lateral directions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair back provided with a lumbar support capable of properly supporting the back of a lumbar region of a occupant.

[0002]

2. Description of the Related Art Although the backrest of a chair having a lumbar support function is known, the conventional one has a complicated mechanism, increases the cost and is cumbersome to handle.

The lumbar support that can be moved up and down as desired is described in, for example, Japanese Utility Model 1-8.
Although described in Japanese Patent Publication No. 214, it is necessary to provide a groove in the backrest body, which changes the shape of the chair itself.

The backrests described in Japanese Utility Model Publication No. 1-8214 and Japanese Utility Model Laid-Open Publication No. Sho 57-172536, etc. have a detachable cushion or the like on the front surface, and thus lack a sense of unity. There is a disadvantage that the appearance is bad.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a chair back which has a simple structure and a height-adjustable lumbar support, and which is nicely mounted.

[0006]

According to the present invention, the above-mentioned problem is solved as follows. (1) A skin material is stretched on the front surface of the backrest body with a gap provided therebetween, and a lumbar support pointing in the left-right direction is inserted and held in the gap.

(2) In the above item (1), cutouts are provided in the left and right side edges of the outer shell material, which are directed vertically, and the side ends of the lumbar support are exposed into the cutouts.

(3) In the above item (1) or (2), by setting the vertical dimension of the gap to be larger than the vertical dimension of the lumbar support, the lumbar support can be vertically moved within the gap. Can be moved.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

As shown in FIGS. 1 and 2, the backrest main body (1) of the chair has a cushion body (2) surrounded by a skin material (3), and its front surface has a vertical dimension. A slightly larger gap (4) is provided, and a skin material (5) is stretched.

Notches 6 and 6 are provided below the left and right side edges of the outer skin material 5 so as to be long in the up-down direction and to have the inner edge substantially vertical. As shown in FIG. 7, on the inner edge of the cutout portion (6), a bead (7) is provided following the left and right side edges of the outer cover material (5).

In the gap (4), the vertical dimension is
A horizontally long plate-shaped lumbar support (8) made of synthetic resin having a size smaller than the vertical dimension of the gap (4) and having appropriate flexibility is inserted.

[0013] The lumbar support (8) is gently concavely curved rearward in a plan view and forwardly in a side view so that the back of the waist of the occupant can properly abut.
A plurality of cuts (9) are provided at appropriate locations on the upper and lower edges to provide preferable flexibility (see FIGS. 3 to 5).

The lumbar support (8) has such a length that its side end is exposed into the notch (6). As shown in FIG. 6, the lumbar support (8) has a side edge of its main body (10). Peripheral wall (11) that faces forward and whose upper and lower edges extend slightly inward,
The outer wall (11) is provided with an outward V-shaped narrow groove (12) inside.

The portion surrounded by the slot (12) is an inward tongue (1).
3), and outward holes (14) (14) above and below the slot (12)
Slightly inward of the outer end of the lumbar support (8), there are provided substantially vertical engagement holes (15) and (16) that bite into the body (10) side and the inward tongue piece (13) side.

When the lumbar support (8) is inserted into the gap (4), the positions of the engaging holes (15) and (16) are determined by the outer cover material (5).
Is formed so as to overlap with the bead (7) at the inner edge of the notch (6), and has a width substantially equal to the width of the bead (7).

Adjacent to the inner edge of the peripheral wall (11), the body (10) of the lumbar support (8) has mounting holes (17) (17) arranged vertically.
Is provided.

(18) is a flat box-shaped cover facing backward,
Outer side portion (19) that can be properly fitted to the outer surface of the peripheral wall (11)
And an inward V-shaped inner side portion (20) that can cover the slot (12).
And are connected at substantially horizontal upper and lower sides (21) and (21), and a cover piece (22) is provided over these sides,
In the vicinity of the upper and lower sides (21) (21), the cover piece (22) is provided with rearward locking claws (23) (23) that can be inserted and locked into the mounting hole (17).

The lumbar support (8) is inserted into the gap (4), and as shown in FIG. 7, the substantially vertical engagement holes (15) and (15) above and below the slot (12) are inserted into the bead (7). ) On the back side, and the inward tongue (1
3) is elastically bent and superimposed on the front surface of the outer cover material (5).
As a result, of the engagement holes (15) and (16), the one (16) on the inward tongue piece (13) side is in front of the bead (7), and the one (15) on the body (10) side is also The lumbar support (8) is fitted and locked to the rear surface of the bead (7), thereby preventing unintentional movement of the lumbar support (8) in the vertical and horizontal directions.

[0020]

【The invention's effect】

(a) The configuration of the lumbar support and its mounting portion is simple, and its mounting and removal are easy.

(B) According to the second aspect, the lumbar support can be easily gripped.

(C) According to the third aspect, the vertical position of the lumbar support can be easily adjusted.

[Brief description of the drawings]

FIG. 1 is a front view of a chair provided with a backrest according to the present invention.

FIG. 2 is a vertical sectional side view taken along the line II-II in FIG.

FIG. 3 is a front view of the lumbar support main body.

FIG. 4 is a cross-sectional plan view taken along line IV-IV in FIG.

FIG. 5 is a side view of the lumbar support main body.

FIG. 6 is an enlarged perspective view of a side end of a lumbar support and a cover.

FIG. 7 is an enlarged perspective view showing a side end portion and a cover of the lumbar support in a mounted state.

[Explanation of Signs] (1) Backrest body (2) Cushion body (3) Skin material (4) Gap (5) Outer skin material (6) Notch (7) Ball (8) Lumber support (9) Cut ( 10) Body (11) Peripheral wall (12) Slot (13) Inward tongue (14) Outward hole (15) (16) Engagement hole (17) Mounting hole (18) Cover (19) Outer side (20) Inner side (21) Upper and lower sides (22) Cover piece (23) Locking claw

Claims (3)

[Claims] 1. A backrest of a chair in which a gap is provided on the front surface of a backrest main body and a skin material is stretched, and a lumbar support that faces left and right is inserted and held in the gap. 2. The backrest of a chair according to claim 1, wherein a notch is provided in the left and right side edges of the outer shell material, and the side end of the lumbar support is exposed into the notch. 3. The chair according to claim 1, wherein the vertical dimension of the gap is larger than the vertical dimension of the lumbar support so that the lumbar support can be moved up and down within the gap. Backrest.