JPH10211051A - Lumbar support device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate fear of a lumbar support to come out in the lateral direction and to enable to be respectably fit on, by equipping an engaging means to be engaged with a part of both side parts of a backrest onto both end parts of a lumbar support in a chair mounted with the lumbar support on the front face of the backrest. SOLUTION: The backrest main body of a chair is made by wrapping a cushion body with a surface leather material and a gap is formed by tensely setting an outer leather material 5 on the front face. A laterally long plate-like lumbar support 8 made of synthetic resin is inserted into the gap. That is, the lumbar support 8 is inserted into the gap and upper and lower engaging holes 15, 15 of groove holes 12 formed on the side end edge of the lumbar support main body are positioned on the rear face of a beading 7 connected to right and left side edges of the outer leather material 5, and an inward facing tongue piece 13 is overlapped on the front face of the outer leather material 5. Thereby an engaging hole 16 on the inward facing tongue 13 side is fit and engaged with the front face of the beading 7 and an engaging hole 15 on the main body 10 side with the rear face of the beading 7 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 lumbar support which is mounted on the front of a backrest of a chair so that the lumbar support can be moved up and down so as to reduce the fatigue of the occupant. And a lumbar support device.

[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 The present invention relates to a lumbar support device having a simple structure in which the height of the lumbar support can be adjusted to the front of the backrest of the chair without being deviated in the left-right direction and the height can be adjusted. The purpose is to provide.

[0006]

According to the present invention, the above-mentioned problem is solved as follows. (1) In a lumbar support device in which a lumbar support for abutting against the waist of a occupant is vertically movably mounted on a front surface of a backrest of a chair, at least one of both side portions of the lumbar support is provided at both ends of the lumbar support. An engagement means for engaging the portion is provided.

(2) In the above item (1), the engaging means is
The structure is such that both side edges of the outer skin material arranged on the front of the back of the chair are sandwiched from front and rear.

(3) In the above item (2), the engaging means is
Base ends are continuously provided on both sides of the horizontally long plate-shaped lumbar support main body, and extend inward substantially in parallel with the lumbar support main body to sandwich the side edge of the outer skin material with the lumbar support main body. It has a pair of left and right inward tongue pieces.

(4) In the above item (3), outwardly V-shaped grooves are provided on both sides of the lumbar support main body, and a portion surrounded by the grooves is an inward tongue.

(5) In the above item (4), the upper and lower edges of the inward tongue piece and the opposing edges of the slot on the lumbar support main body side engage with the bead formed on the side edge of the outer skin material. An engagement hole is provided.

(6) In any one of the above item (2) or (3) to (5), which is subordinate to the item (2), the lumbar support body is brought into contact with the side edge of the outer shell material, and An abutment piece is provided to prevent the edge from penetrating deeply into the engagement means.

(7) The above items (3) to (5) or (3) to
In any one of the above paragraphs (5) and (6), the upper and lower edges of the inward tongue may be engaged with the inside of a bead formed on the side edge of the outer shell material, and Protrusions are provided to prevent the rim from coming off the inward tongue.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, a backrest body (1) of a chair comprises a cushion body (2) and a skin material (3).
A space (4) having a slightly larger vertical dimension is provided on the front surface thereof, and a skin material (5) is stretched.

Cutouts (6) and (6) are provided below the left and right side edges of the outer cover material (5), and are long in the up-down direction and the inner edges are 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.

The lumbar support (8) is slightly concavely bent rearward in a plan view and forwardly in a side view so that the back of the waist of the occupant can abut properly.
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 piece (13) serving as an engagement means, and is located outside the outward holes (14) and (14) above and below the slot (12). Slightly inward from the end, there are provided substantially vertical engagement holes (15) and (16) that bite into the body (10) side of the lumbar support (8) and the inward tongue piece (13).

When the lumbar support (8) is inserted into the gap (4), the positions of the engagement holes (15) and (16) are determined by the outer 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).

The portion of the main body (10) that is continuous from the inner end of the peripheral wall (11) and that is aligned with the outer edge of the engagement hole (15) has a side edge of the outer shell material (5), that is, Abuts on the outer skin material
A pair of upper and lower abutting pieces (11a) are provided to prevent the side edge of (5) from penetrating deeply into the outward holes (14) (14).

An engagement hole in the rear surface of the inward tongue piece (13)
At the upper and lower edges close to (16), engage the inside of the bead (7),
A pair of upper and lower protrusions (13a) are provided to prevent the side edge of the outer cover material (5) from coming inward from the inward tongue piece (13).

Thus, the bead (7) of the outer cover material (5) is always engaged with the engagement holes (15) and (16) by the contact piece (11a) and the projection (13a).
Through to the back of the inward tongue (13).

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

(18) is a flat box-shaped cover facing rearward.
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.

[0026]

【The invention's effect】

(a) By engaging the engaging means provided on both side ends of the lumbar support with at least a part of both sides of the backrest, the lumbar support does not come off from the backrest in the left-right direction or displace. The lumbar support is mounted on the backrest so that it can be moved up and down, and it is only necessary to provide engagement means on both side ends of the lumbar support, so that the structure can be simplified and grooves or other processing on the backrest itself can be performed as in the conventional case. The lumbar support is provided with a coupling member or the like at the intermediate portion thereof, whereby the elasticity of the intermediate portion of the lumbar support is impaired, and the occupant does not feel uncomfortable. Also, the lumbar support can be easily attached and detached.

(B) According to the second aspect, the thickness of the engaging means in the front-rear direction can be reduced, and the overall thickness of the lumbar support device can be reduced.

(C) According to the third aspect, the inward tongue piece can be easily formed integrally with the lumbar support body.

(D) According to the fourth aspect, the engaging means and the lumbar support can be easily formed as one member.

(E) According to the fifth aspect, the bead of the outer skin material is engaged with the engagement hole, and the outer skin material is prevented from coming inward from the engagement means.

(F) According to the sixth aspect, the contact piece abuts on the side edge of the outer shell material, and the side edge of the outer shell material is prevented from digging deeply into the engaging means.

(G) According to the seventh aspect, the projection is engaged with the inside of the bead, and the side edge of the outer skin material is prevented from coming inward from the inward tongue piece.

[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 symbols]

 (1) Backrest body (2) Cushion body (3) Skin material (4) Gap (5) Skin material (6) Notch (7) Ball (8) Lumbar support (9) Cut (10) Body (11) ) Peripheral wall (11a) Contact piece (12) Slot (13) Inward tongue (13a) Projection (14) Outward hole (15) (16) Engagement hole (17) Mounting hole (18) Cover (19) Outside Side (20) Inner side (21) Upper and lower sides (22) Cover (23) Locking claw

Claims (7)

[Claims] 1. A lumbar support device in which a lumbar support to be brought into contact with the waist of a occupant is vertically movably mounted on a front surface of a backrest of a chair, wherein both ends of the lumbar support are provided at both ends of the lumbar support. A lumbar support device comprising an engaging means for engaging at least a part thereof. 2. The lumbar support device according to claim 1, wherein the engaging means sandwiches both side edges of the outer cover material arranged on the front surface of the back of the chair from front and rear. 3. A lumbar support body, wherein the engaging means has base ends connected to both sides of a horizontally long plate-shaped lumbar support body and extends inward substantially in parallel with the lumbar support body. 3. The lumbar support device according to claim 2, further comprising a pair of left and right inward tongue pieces sandwiching a side edge of the outer skin material therebetween. 4. The lumbar support device according to claim 3, wherein outwardly V-shaped grooves are provided on both sides of the lumbar support main body, and a portion surrounded by the grooves is an inward tongue. 5. An engaging hole for engaging with a bead formed on a side edge of an outer skin material is provided at upper and lower edges of an inward tongue piece and an edge of a slot on a lumbar support body side facing the inward tongue piece. 4. The lumbar support device according to 4. 6. The lumbar support body according to claim 2, further comprising an abutting piece which abuts against a side edge of the outer shell material to prevent the side edge from penetrating deeply into the engaging means. 6. The lumbar support device according to any one of claims 3 to 5, wherein 7. The upper and lower edges on the rear surface of the inward tongue engage with the inside of a bead formed on the side edge of the outer skin material to prevent the side edge of the outer skin material from coming off the inward tongue piece inward. The lumbar support device according to any one of claims 3 to 5, wherein the lumbar support device is provided with a projection.