JP5014682B2 - Chair lumbar support equipment - Google Patents

Description

  The present invention relates to a lumbar support device for supporting a waist of a seated person in a chair.

  Some chair backrests are provided with a lumbar support device that can comfortably support the lumbar part of the occupant so as to relieve fatigue when sitting for a long time (for example, Patent Documents). 1).

In this lumbar support device, a holding piece disposed on the front side of the board constituting the backrest and projecting from the left and right end portions of the lumbar support is folded back to the back side of the board, and the holding piece and the lumbar support side The lumbar support is attached to the substrate so as to move up and down by sandwiching the left and right sides of the substrate with the end portions.
JP 2001-128787 A

  However, the lumbar support device described in Patent Document 1 requires only a small number of parts. On the other hand, when attaching the lumbar support to the board, the lumbar support is inclined left and right in front view, Therefore, there is a problem in that the mounting is troublesome and the outer shape of the substrate constituting the backrest is also limited.

  The present invention has been made to solve the conventional problems as described above, and is a chair that has a structure that can be easily attached to the backrest and is not limited by the external shape of the board. The object is to provide a lumbar support device.

According to the present invention, the above problem is solved as follows.
(1) In the lumbar support device mounted on the back of the chair, the left and right lumbar supports are disposed between the board constituting the back and the cushion body in the front view, and at both left and right ends of the board, Protruding forward from the front surface of the board, and provided with a vertically backward U-shaped support part in side view, a slit that penetrates in the left and right direction and extends in the up and down direction is formed, and the left and right end parts of the lumbar support A mounting member having an operating portion is attached to the left and right end portions of the lumbar support through which the slit is inserted, and a recess and a protrusion that are engageable with each other are further interposed between the support portion and the mounting member. The lumbar support can be moved up and down by providing a detent mechanism composed of a portion and operating the operation portion in the vertical direction.

(2) above (1) open fraud and mitigating risk left and right end portions of the substrate facing the supporting lifting unit in section the opening by penetrating, disposing the operating portion of the mounting member to the rear of the substrate.

(3) above (1) or (2) Oite in section an operating portion of the attachment member, the opening of the left and right end portions of the substrate, the lateral direction of the substrate and extending inwardly, the operation portion of the substrate Do not protrude outward from the left and right ends.

( 4 ) In any one of the above items (1) to ( 3 ), the attachment member is provided with an attachment portion provided with an attachment hole into which the left and right ends of the lumbar support are inserted, and from the attachment portion to the rear of the substrate or the substrate It is comprised by the operation part extended in the left-right direction outward thru | or inward.

( 5 ) In any one of the above items (1) to ( 4 ), an operation knob extending rearward of the substrate is provided in the operation portion of the attachment member.

( 6 ) In any one of the above items (1) to ( 5 ), a frame-shaped intermediate plate is provided between the substrate and the cushion body, and a lumbar support is disposed between the substrate and the intermediate plate.

According to the invention of the above (1), the end portions of the lumbar support corresponding to the slits provided at the left and right end portions of the substrate are respectively inserted, and the left and right end portions of the lumbar support into which the slit is inserted are respectively inserted. When each mounting member having an operation portion is attached, the lumbar support can be attached to the substrate so as to be easily movable up and down, so that assembly is simplified. Further, when the operation portion of the mounting member is moved up and down, the lumbar support is also moved up and down together, and the vertical adjustment of the lumbar support can be easily performed. Furthermore, since the means for attaching the lumbar support to the substrate only needs to be provided with slits at the left and right ends of the substrate, the outer shape of the substrate is not limited, and a degree of design freedom can be obtained.

Moreover, the slit for attaching a lumbar support to a board | substrate can be easily formed only by providing a board | substrate with a vertically long U-shaped support part in a side view.

Furthermore, the lumbar support is moved up and down together with the mounting member, and each time the mounting member is moved to a position where the concave portion and the convex portion correspond to each other, the concave portion and the convex portion are engaged with each other. It is transmitted to the person's finger and can be recognized that it has been switched to a predetermined position. Moreover, if it stops at that position, the lumbar support can be stopped at the adjusted position.

According to the invention of the above (2) , the mounting member is placed in the left and right widths of the substrate by disposing the operation portion of the mounting member in the openings provided at the left and right ends of the substrate. This makes it possible to obtain a compact lumbar support device.

According to the invention of the above (3) , since the operating portion of the mounting member is prevented from protruding outward in the left-right direction from the left and right end portions of the substrate, the mounting member is provided in a state of being accommodated within the left-right width of the substrate. Therefore, it is possible to obtain a compact lumbar support device.

According to the invention of the above item (4) , when the left and right ends of the lumbar support are inserted into the mounting holes of the mounting member, the mounting member can be easily mounted on the lumbar support, and assembly is facilitated.

According to the invention of the above item (5) , when the lumbar support is moved up and down, it can be operated with the surface of the operation portion of the mounting member aligned with the back surface of the substrate. Smooth along the back.

According to the invention of the above item (6) , the deformation of the intermediate plate can be suppressed by supporting the cushion material with the intermediate plate. Further, since the intermediate plate is formed in a frame shape, even if the intermediate plate is provided between the substrate and the cushion body, the intermediate plate does not hinder the elastic deformation characteristics of the substrate.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a backrest of a chair to which a lumbar support device according to an embodiment of the present invention is applied as seen from the front side, and FIG. 2 is an enlarged perspective view of essential members in the backrest as seen from the front side. 3 and FIG. 3 are exploded perspective views of the backrest as seen from the back side with the skin material removed, FIG. 4 is an exploded perspective view of the backrest as seen from the front side, and FIG. The enlarged back view of the backrest, FIGS. 6, 7, and 8 are the sectional view taken along the line VI-VI, the sectional view taken along the line VII-VII, the sectional view taken along the line VIII-VIII in FIG. It is an expansion perspective view of the principal part member.

  As shown in FIGS. 3 and 4, the backrest (1) is composed of a board (2), a cushion body (3) disposed on the front surface thereof, and a board (2) and a cushion body (3). The lumbar support (5) is provided between the intermediate plate (4) and the substrate (2). The front surface of the cushion body (3) is covered with a skin material (6).

  The substrate (2) is an integrally molded product of synthetic resin, and as shown in FIGS. 2 to 5, a mesh (7) penetrating in the front-rear direction is provided on the inner side surrounded by the peripheral portion, and the whole is elastic. It can be deformed, and a smooth flexure can be obtained according to the body shape of the seated person.

  A plurality of engaging protrusions (9) and engaging protrusions (10) are provided on the front surface of the peripheral edge (8) of the substrate (2). As shown in FIG. 4, a pair of engaging protrusions (9) are formed at the upper left and right end portions of the front surface of the peripheral edge portion (8) so as to protrude forward. A plurality of engaging protrusions (10) are provided on the upper and lower portions and the left and right portions of the peripheral edge portion (8) so as to protrude in the front-rear direction at a predetermined interval.

Vertical openings that are recessed inward from the left and right side edges of the board (2) and penetrated back and forth at the positions where the lumbar supports (5) are attached to the left and right ends of the board (2). (11) (11) is formed.

As shown in FIG. 6, the positions opposite to the substrate opening of left and right end portions of the front surface of (2) (11) (11), backward U-shaped support portion of the side view vertically long (12), the substrate ( Projecting forward from the front of 2). The backward pieces (12a) and (12a) facing rearward from the upper and lower ends of the support portion (12) are connected to the front surface of the substrate (2) at the upper and lower ends of the opening (11). The two rear pieces (12a) and (12a) of the support portion (12) protrude forward at a substantially right angle from the substrate (2) and connect the front ends of the two rear pieces (12a) and (12a). The main body (12b) is parallel to the front surface of the substrate (2). A slit (13) penetrating in the left-right direction and extending in the up-down direction is formed between the front surface of the substrate (2) and the main body (12b). Further, as shown in FIG. 5, a plurality of locking recesses (14) are arranged on the surface facing the back side of the main body (12b) so as to form a row at predetermined intervals in the vertical direction. Is formed.

  The middle plate (4) is also an integrally molded product of synthetic resin, and the peripheral edge of the substrate (2) is composed of left and right vertical edges (15a) (15a) and upper and lower horizontal edges (15b) (15b). (8) The peripheral part (15) formed in the shape of a frame having substantially the same size as that of (8) and the middle part extending in the left-right direction connecting the vertical middle parts of the left and right vertical edge parts (15a) (15a) to each other The connecting portion (16) is integrally provided. Further, the outer shape of the peripheral edge portion (15) has a shape that substantially matches the basic outer shape of the cushion body (3) so as to be a core material of the cushion body (3).

An engagement hole (17) and an engagement hole (18) are formed in the peripheral edge portion (15) of the intermediate plate (4). The engagement holes (17) are provided at the left and right positions of the upper lateral edge (15b) corresponding to the engagement protrusions (9) of the substrate (2), and are detachable from the engagement protrusions (9). Engageable. On the other hand, engagement holes (18), the left and right longitudinal edges (15a) (15a) and upper and lower transverse edges (15b) (15b), in correspondence with the engaging projection of the substrate (2) (10) A plurality of them are provided so as to be detachably engageable with the engaging protrusion (10).

  The left and right end portions of the intermediate connecting portion (16) have a bifurcated portion (16a) and a bifurcated portion (16b) projecting outward in the vertical direction. The free ends of the two branch portions (16a) and (16b) are connected to the middle portion in the vertical direction of the left and right vertical edge portions (15a) of the middle plate (4). The branch portions (16a) and (16b) distribute the external force applied to the connecting portion between the intermediate connecting portion (16) and the vertical edge portions (15a) and (15a) to the upper and lower connecting portions, respectively. The strength of is increased.

  On the other hand, three locking holes (19), (19) and (19), which are slit-shaped extending in the left-right direction and penetrated in the front-rear direction, are formed in the central portion of the intermediate connecting portion (16) at a predetermined interval. Formed. In each of these locking holes (19), the other end of the retractor (20) whose one end is connected to a part of the skin material (6) can be locked.

Lumbar support (5) is, in a front view, a horizontally long belt-like body portion extending in the lateral direction (21), the body portion (21), central portion in the longitudinal Direction protrudes toward the rear, left and right It is formed in a bow shape that is curved so that both side portions are positioned forward .

At both left and right ends of the main body (21), attachment end portions (22) and (22) projecting outward are formed. The distance between the outer ends of the left and right mounting ends (22) and (22) is slightly smaller than the distance between the outer ends of the openings (11) and (11) of the board (2) in front view, The substrate (2) is formed so as not to protrude outward in the left-right direction from the left and right ends of the substrate (2).

Mounting members (23) for operating the lumbar support ( 5 ) in the vertical direction are attached to the left and right mounting end portions (22) and (22), respectively. As shown in FIG. 9, a pair of engaging claws (24) projecting forward is provided at the outer front end portion of (22) and (22) apart from each other in the vertical direction.

  The attachment member (23) is an integrally molded product of synthetic resin, and is inserted into the opening (11) from the rear of the substrate (2) as shown in detail in FIG. 12b) A mounting portion (25) that can move in the vertical direction in the opening (11) in contact with the inner surface, and from the mounting portion (25) to the outer side and the inner side of the board (2). An extending operation part (26) is integrally provided.

The mounting portion (25) is provided with mounting holes (27) through which the left and right mounting end portions (22) of the lumbar support (5) are inserted to the left and right, and the mounting end portion (22). Is inserted to the predetermined position, the engaging step (28) in which the engaging claw (24) is prevented from coming off is engaged. On the front surface of the mounting portion (25) facing the main body portion (12b) of the support portion (12), the locking concave portion (14) corresponds to the locking concave portion (14) of the main body portion (12b). ) And a detent mechanism (29) constituting a detent mechanism. On the other hand, an operation knob (30) extending rearward of the substrate (2) is integrally formed with the operation portion (26).

Next, an example of the assembly procedure of the backrest (1) will be described. First, the cushion body (3) is arranged on the front surface of the middle plate (4) so as to cover the front surface of the middle plate (4), and the skin material (6) is covered from the front outer side of the cushion body (3). At this time, the area in need of pulling of the skin material (6), permanently installing the front end of the retractor (20).

  Next, the retractor (20) is inserted from the front into the notch (3a) (see FIG. 4) that penetrates the cushion body (3) in the front-rear direction and extends in the left-right direction, and the rear end of the retractor (20) The portion is inserted into each locking hole (19) of the intermediate connecting portion (16), and the rear end portion is engaged and prevented from coming off on the back side of the intermediate connecting portion (16).

  Thus, as shown in FIG. 1, the cushion body (3) is provided on the surface of the backrest (1) with the pulling portion (31) of the skin material (6) extending in the left-right direction when viewed from the front. And the skin material (6) are arranged on the intermediate plate (4).

  Next, the peripheral edge of the skin material (6) is wound around the back side of the intermediate plate (4), and this peripheral edge is fixed to the peripheral edge (15) of the intermediate plate (4) with a tacker needle. Thereby, the intermediate plate (4), the cushion body (3), and the skin material (6) are integrated.

  Next, the lumbar support (5) is attached to the substrate (2). First, the main body part (21) of the lumbar support (5) is bent forward, and the left and right attachment end parts (22) and (22) are inserted into the left and right slits (13) and (13) from the inside, respectively. Let Next, the mounting member (23) faces the outer side of the opening (11), and the locking claw (24) engages with the locking step (28) in the mounting hole (27) of the mounting portion (25). When the attachment end (22) is press-fitted until they are aligned, the attachment member (23) is attached to the attachment end (22). This is done on both the left and right sides.

  The mounting member (23) assembled to the lumbar support (5) is pressed against the inner surface of the main body (12b) of the support (12), and the operation knob (30) is moved from the back surface of the substrate (2). It is held in a state of slightly protruding toward the rear.

  Subsequently, the substrate (2) faces the intermediate plate (4) from the rear of the intermediate plate (4), and the engagement protrusion (9) and the engagement protrusion (10) of the substrate (2) correspond to these. When the base plate (2) is fixed to the middle plate (4) by engaging with the engagement holes (17) and (18) of the middle plate (4), the assembly of the backrest (1) is completed. To do. The peripheral edge of the skin material (6) is sandwiched between the intermediate plate (4) and the substrate (2) and is not exposed to the outside.

  The backrest (1) constructed in this way is operated by vertically grasping the operation knob (30) of the mounting member (23) exposed on the back surface of the backrest (1) with a finger and vertically in the opening (11). By moving the lumbar support (5), the lumbar support (5) moves in the vertical direction, and the height position of the lumbar support (5) in the vertical direction can be easily adjusted.

  Further, when the mounting member (23) is moved in the vertical direction, each time the locking projection (29) corresponds to the locking recess (14), it falls into the corresponding locking recess (14), and at that time Since the touch is transmitted to the operator's finger, the lumbar support (5) can be easily held at a desired position.

It is the perspective view which looked at the backrest of the chair to which the lumbar support device concerning one embodiment of the present invention was applied from the front side. It is the expansion perspective view which looked at the principal part member in the backrest from the front side. It is the disassembled perspective view which removed the skin material and saw the backrest from the back side. It is the disassembled perspective view which similarly removed the skin material and looked at the backrest from the front side. It is an enlarged rear view of a backrest. It is the VI-VI sectional view taken on the line in FIG. It is the VII-VII sectional view taken on the line in FIG. It is the VIII-VIII sectional view taken on the line in FIG. It is an expansion perspective view of the principal part member of a backrest.

(1) Backrest
(2) Board
(3) Cushion body
(3a) Notch
(4) Middle plate
(5) Lumber support
(6) Skin material
(7) Mesh
(8) Perimeter
(9) Engagement protrusion
(10) Engagement protrusion
(11) Opening
(12) Support part
(12a) Rear piece
(12b) Main unit
(13) Slit
(14) Locking recess
(15) Perimeter
(15a) Vertical edge
(15b) Horizontal edge
(16) Intermediate connection
(16a) Branch
(16b) Branch
(17) Engagement hole
(18) Engagement hole
(19) Locking hole
(20) Retractor
(21) Main unit
(22) Mounting end
(23) Mounting member
(24) Claw
(25) Mounting part
(26) Operation unit
(27) Mounting hole
(28) Locking step
(29) Locking projection
(30) Operation knob
(31) Pull part

Claims (6)

In the lumbar support device attached to the back of the chair,
Between the board constituting the backrest and the cushion body, a left and right lumbar support is disposed in front view,
Protruding forward from the front surface of the substrate at the left and right ends of the substrate, and providing a vertically long U-shaped support portion in side view, a slit extending in the left-right direction and extending in the up-down direction is formed. A mounting member having an operating portion is attached to the left and right end portions of the lumbar support that are inserted through the left and right end portions of the lumbar support and the slits are inserted, and further, between the support portion and the mounting member, A lumbar support device for a chair, characterized in that a detent mechanism composed of a concave portion and a convex portion that can be engaged is provided, and the lumbar support can be moved up and down by operating the operation portion in the vertical direction. Open the left and right end portions of the substrate facing the support part, the opening by penetrating, chair lumbar support device according to claim 1, wherein the operating portion of the mounting member, characterized in that disposed behind the substrate . The operation part of the mounting member is extended inward in the left-right direction of the board from the openings at both left and right ends of the board, so that the operation part does not protrude from the left-right end part of the board in the left-right direction. The lumbar support device for a chair according to claim 1 or 2 . The mounting member is constituted by a mounting portion having mounting holes for fitting the left and right end portions of the lumbar support, and an operation portion extending from the mounting portion to the rear of the board or from the outside in the left-right direction to the inside of the board. The lumbar support device for a chair according to any one of claims 1 to 3 . The lumbar support device for a chair according to any one of claims 1 to 4 , wherein an operation knob extending rearward of the board is provided in an operation portion of the attachment member. The lumbar support for a chair according to any one of claims 1 to 5 , wherein a frame-shaped intermediate plate is provided between the substrate and the cushion body, and a lumbar support is disposed between the substrate and the intermediate plate. apparatus.

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