JP4518602B2 - Lumber support device in chair - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lumbar support device in a chair, and in particular, a lumbar support in which a set height position of the lumbar support can be freely adjusted and can be fixed easily and stably at the adjusted position. Relates to the device.
[0002]
[Prior art]
For example, Japanese Patent Application Laid-Open No. 10-211051 discloses that the height of the mounting position of the lumbar support is adjusted. According to the present invention, engagement means including inward tongue pieces that engage with the left and right side portions of the backrest are provided at the left and right end portions of the lumbar support.
[0003]
[Problems to be solved by the invention]
However, in the above-mentioned, there are problems that a large force is required for the operation of releasing the engaging means, and that it is difficult to adjust the lumbar support height while sitting on the chair.
SUMMARY OF THE INVENTION An object of the present invention is to provide a lumbar support device in which the engaging means can be easily released and the height position of the lumbar support can be easily adjusted while sitting on a chair.
[0004]
[Means for Solving the Problems]
According to the present invention, the above problem is solved as follows.
[0005]
(1) In a lumbar support device for a chair in which the lumbar support that abuts against the lumbar part of the seat is attached to the front of the backrest so that it can be moved up and down, the lumbar support is folded back to the left and right ends of the lumbar support is a faced pieces sandwiching a side edge of the backrest and protrudes from the outer end of the faced pieces outward, the faces piece integrally formed an operation handle for expanding a back in the faces piece Engagement means that can adjust the vertical position of the lumbar support by selectively engaging with engagement means provided at a plurality of positions in the vertical direction of the back of the back on the surface facing the back of the back. It is provided that both the engaging means can be released by expanding the holding piece by the operation handle .
[0006]
(2) In the above (1) term, as the engaging means, the surface facing the backrest back in the backrest back to a plurality of convex engagement portion in the vertical direction, and suffers piece, the convex engagement A hole or recess for fitting and locking the joint is provided.
[0007]
(3) In the above item (1) or (2) , the lumbar support to be brought into contact with the waist portion of the seat portion is suspended from the side end portions of the left and right holding pieces via the hanging arms suspended from the front surface of the backrest. Provide below.
[0008]
(4) In the above item (3) , the suspension arm is provided with a flexible portion that can be elastically bent in the front-rear direction.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of the lumbar support, and FIG. 2 is a rear view thereof.
[0010]
The horizontally long strip-shaped main body (2) of the lumbar support (1) is gently curved backward in the longitudinal direction, and a bulging portion (3) is formed at the center of the front surface.
[0011]
Extending from the left and right ends of the main body (2) is a strip-shaped suspension arm (4) that faces upward and obliquely outward, and an intermediate portion of the suspension arm (4) has a corrugated flexible portion. (5) is formed.
[0012]
Further, a support portion (6) extending horizontally outward is formed at the upper and outer ends of the suspension arm (4), and the tip thereof is folded back inward to form a holding piece (7). .
[0013]
The size of the gap (8) between the support portion (6) and the holding piece (7) is such that the side end portion of the backrest (12) can be clamped between the back end portions of the backrest (12) of the chair described later. It is almost adapted to the wall thickness.
[0014]
At the outer end of the left and right holding pieces (7), an operation handle (9) is formed to protrude outward substantially parallel to the holding piece (7), and the holding piece (7) and the operation handle (9) ) Is provided with a reinforcing flange (10). The holding piece (7) is formed with an engaging means comprising a horizontally long through hole (11).
[0015]
FIG. 3 is a rear view of the backrest (12). The backrest (12) is a substrate made of metal or synthetic resin, and has a mesh (13) penetrating in the front-rear direction, and a bent portion (14) is provided at a substantially central portion in the vertical direction of the left and right side end portions. The upper and lower end portions are provided with attachment portions (15) to the support rods.
[0016]
Further, as shown in FIG. 5, the backrest (12) has a shape in which a waist portion protrudes forward, a lower end portion and an upper end portion are curved rearward, and is substantially forward-shaped in a side view.
[0017]
On the rear surface of the backrest (12), as shown in FIG. 3, the left and right end portions corresponding to the height of the waist of the seated person are formed by a plurality of horizontally long convex engaging portions (16). The joining means are formed in the vertical direction at predetermined intervals. The convex engaging portion (16) can be engaged with a through hole (11) which is an engaging means provided on the holding piece (7) of the lumbar support (1).
[0018]
4 is an enlarged cross-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-rear direction is restricted.
[0019]
In FIG. 4, when the front end portion of the operation handle (9) is gripped and pulled forward (indicated by arrow B), the front end portion of the holding piece (7) integrally connected via the reinforcing flange (10) is obtained. Since it opens rearward (indicated by arrow C) and the gap (8) becomes larger, the convex engaging portion (16) is removed from the through hole (11), the engagement of both engaging means is released, and the lumbar support ( 1) can be easily moved in the vertical direction.
[0020]
The main body (2) of the lumbar support (1) is suspended below the operation handle (9) by the length of the suspension arm (4), so the main body (2) is positioned lower. However, the operation handle (9) can be set at a position that can be easily handled by the hand of the person who is seated.
[0021]
Since the flexible arm (5) is formed on the suspension arm (4), the flexible body (5) is bent so that the main body (2) becomes a curved portion of the backrest (12). Also fits and slides.
[0022]
For example, as shown in FIG. 5, even when the main body (2) of the lumbar support (1) is positioned below the curved portion of the backrest (12), the main body (2) is The flexible portion (5) of the suspension arm (4) is curved by being pressed by the cushion (17) disposed on the front surface of (12), and the main body (2) is always supported by the backrest (12). Can slide while touching the surface.
[0023]
The present invention is not limited to the embodiment described above, and can be appropriately changed in design according to the purpose. For example, the engaging means of the holding piece (7) of the lumbar support (1) may be a wave-shaped recess instead of the through hole, and the engaging means of the holding piece (7) and the backrest back face each other. It may be tooth-shaped.
[0024]
【The invention's effect】
The present invention configured as described above has the following excellent effects.
[0025]
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 with the operation handle. Is very easy to adjust.
Further, the height adjustment can be easily performed while confirming the contact state of the lumbar support with the waist while keeping the sitting posture.
Furthermore, since the left and right end portions of the backrest are sandwiched by the left and right holding pieces of the lumbar support, the lumbar support is prevented from wobbling in the front-rear and left-right directions.
[0026]
Moreover, since a plurality of engaging means formed on the back of the backrest are formed in the vertical direction, the set height of the lumbar support can be adjusted in small increments.
[0027]
According to the second aspect of the present invention, the lumbar support can be easily and reliably locked and fixed to the backrest at a desired height position.
[0028]
According to the third aspect of the invention, by setting the suspension arm to an appropriate length, even when the height position of the lumbar support main body is low, the operation handle is positioned at a height that is easy for the seated person to operate. Can do.
[0029]
According to the invention described in claim 4 , 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, and a stable seating feeling can be obtained at all times. .
[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 back view of a backrest.
4 is an enlarged sectional view taken along line AA in FIG. 3. FIG.
FIG. 5 is a side view of a backrest and a lumbar support.
[Explanation of symbols]
(1) Lumber support
(2) Body
(3) bulge
(4) Suspended 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) Bending part
(15) Mounting part
(16) Convex engaging part
(17) Cushion

Claims (4)

In the lumbar support device of the chair, which is mounted on the front of the backrest so that it can move up and down, the lumbar support that makes contact with the lumbar part of the seated person,
Spreading the left and right side end portions of the lumbar support, and suffer piece is folded back to the rear side of the backrest to clamping the side end portion of the backrest, projects from the outer end of the faced pieces outward, the faces piece An operation handle to be integrally formed, and by selectively engaging with engagement means provided at a plurality of locations in the vertical direction of the backrest back surface on a surface facing the backrest back surface of the holding piece, A chair characterized in that an engaging means that can adjust the vertical position of the lumbar support is provided, and the two engaging means can be released by expanding the holding piece by the operation handle. Lumbar support device. As the engaging means, a hole in which a plurality of protruding line engaging parts are provided in the vertical direction on the back of the backrest, and the protruding line engaging part is fitted and locked on a surface facing the backrest of the holding piece, or lumbar support device in claim 1, wherein the chair, characterized in that a recess. The lumbar support to abut the waist of the seat, from the side end portions of the left and right faces piece, via a Tsuude which is suspended in front of the backrest, according to claim 1 or 2, characterized in that provided below Lumber support device in the described chair. The lumbar support device for a chair according to claim 3, wherein the suspension arm is provided with a flexible portion that can be elastically bent in the front-rear direction.

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