JP3616977B2 - Chair back - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a backrest of a chair provided with a lumbar support that can appropriately support the back of a waist of a seated person.
[0002]
[Prior art]
The backrest of a chair having a lumbar support function is known, but the conventional one has a complicated mechanism, is expensive, and is troublesome to handle.
[0003]
A lumbar support that can be moved up and down as desired is described in, for example, Japanese Utility Model Publication No. 1-8214. This requires that the backrest body be provided with a groove, and the chair itself Will change the shape.
[0004]
In addition, the backrest described in Japanese Utility Model Publication No. 1-8214 and Japanese Utility Model Publication No. 57-172536 has a cushion or the like that can be attached to and detached from the front surface. There is a drawback.
[0005]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION An object of the present invention is to provide a chair back with a simple structure and a lumbar support that can be adjusted in height.
[0006]
[Means for Solving the Problems]
According to the present invention, the above problem is solved as follows.
(1) In the front surface of the back support body that surrounds the cushion body with a skin material, a skin is provided with a gap, a notch is provided at the lower part of the left and right side edges of the skin material, and the inside of the gap the side end portion of the lumbar support facing the inserted lateral direction to expose in the notch portion.
[0007]
(2) In the above item (1), by making the vertical dimension of the gap larger than the vertical dimension of the lumbar support, the lumbar support can be moved up and down within the gap.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
[0009]
As shown in FIG. 1 and FIG. 2, the backrest body (1) of the chair is formed by surrounding the cushion body (2) with the skin material (3), and the vertical dimension is slightly large on the front surface. The outer cover material (5) is stretched by providing the gap (4).
[0010]
At the bottom of the left and right side edges of the outer skin material (5), it is notch has a length up or down (6) (6) provided. As shown in FIG. 7, the inner edge of the notch (6) is provided with a bead (7) following the left and right edges of the outer skin material (5).
[0011]
In the gap (4), a vertically long lumbar support (8) made of a synthetic resin having a vertical dimension smaller than the vertical dimension of the gap (4) and having an appropriate flexibility. Has been inserted.
[0012]
The lumbar support (8) is gently concave and concave in a rear view in a plan view and in a forward direction in a side view so that the back surface of the lumbar portion of the seated person can properly come into contact with the lumbar support (8). Therefore, a plurality of cuts (9) are provided at appropriate positions on the upper and lower edges (see FIGS. 3 to 5).
[0013]
The lumbar support (8) has such a length that its side end is exposed in the notch (6), and as shown in FIG. A peripheral wall (11) extending in the direction and slightly inward of the upper and lower edges, that is, in the center direction, is provided, and an outward V-shaped narrow slot (12) is provided inward of the peripheral wall (11). ing.
[0014]
The portion surrounded by the slot (12) is an inward tongue piece (13) and is slightly inward from the outer ends of the upper and lower outward holes (14) and (14) of the slot (12). There are provided substantially vertical engagement holes (15) and (16) that bite into the main body (10) side and the inward tongue piece (13) side of the support (8).
[0015]
The positions of these engagement holes (15) and (16) are the positions of the bead (7 on the inner edge of the notch (6) of the outer skin material (5) when the lumbar support (8) is inserted into the gap (4). ) And its width is approximately equal to the width of the bead (7).
[0016]
Adjacent to the inner edge of the peripheral wall (11), the body (10) of the lumbar support (8) is provided with mounting holes (17), (17) arranged vertically.
[0017]
(18) is a flat box-shaped cover facing rearward, and an inward V-shape that can cover the outer side (19) and the slot (12) that can be properly fitted to the outer surface of the peripheral wall (11). The inner side part (20) of the shape is connected to the substantially horizontal upper and lower side parts (21) (21), and a covering piece (22) is provided across each of these side parts. 21) In the vicinity of (21), the cover piece (22) is provided with rearward-facing locking claws (23) and (23) which can be inserted and locked into the mounting hole (17).
[0018]
The lumbar support (8) is inserted into the gap (4), and as shown in FIG. 7, the upper and lower vertical engagement holes (15) and (15) of the slot (12) are inserted into the rear surface of the bead (7). The inner tongue piece (13) is elastically bent and polymerized on the front surface of the outer skin material (5).
Thus, in the engagement holes (15) and (16), the inwardly facing tongue piece (13) side (16) is on the front surface of the bead (7), and the main body (10) side (15) is The rear edge of the ball edge (7) is fitted and locked, and unintentional movement of the lumbar support (8) in the vertical and horizontal directions is prevented.
[0019]
【The invention's effect】
According to the invention which concerns on Claim 1, insertion and extraction of a lumbar support are easy.
[0020]
According to the invention which concerns on Claim 2, the up-and-down position of a lumbar support can be adjusted easily.
[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 side view taken along the line II-II in FIG.
FIG. 3 is a front view of a lumbar support main body.
4 is a cross-sectional plan view taken along the line IV-IV in FIG. 3;
FIG. 5 is a side view of a lumbar support main body.
FIG. 6 is an enlarged perspective view of a side end portion 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 symbols]
(1) Back support body
(2) Cushion body
(3) Skin material
(4) Gap
(5) Skin material
(6) Notch
(7) Ball edge
(8) Lumber support
(9) Cutting
(10) Body
(11) Perimeter 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 (2)

The outer cover material is stretched with a space on the front surface of the backrest body that surrounds the cushion body with the skin material, and a long notch is provided in the lower part of the left and right side edges of the outer cover material, and the gap the side end portion of the lumbar support facing lateral direction is inserted into the inner, back of a chair made by exposing at the notch. The backrest of 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 in the gap.

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