JP2006187666A - Base for backrest of chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a base for the backrest of a chair, which fits the body of a seated person with a simple structure, and suitably and comfortably supports the body by following the motion of the body. <P>SOLUTION: The flexible base for the backrest 1 of the chair is formed of a plastic. The base has different partial flexibilities by the combination of a large number of flexible holes a1 and a2 imparting flexibility and having different shapes. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a chair backrest substrate having flexibility.

Conventionally, there are roughly three types of cushion mechanisms for supporting the entire body, such as a chair seat and a backrest.
First, a cushion material such as polyurethane foam or cotton is stretched over the surface of a three-dimensional curved substrate based on a body curve. According to this, the optimal sitting comfort is obtained when the shape of the board and the curve of the body match, but when the body is moved, a sense of incongruity is felt. In addition, only the stretchability of the cushion material supports the subtle shape of the body and its changes, so a thick cushion material with moderate hardness is required to cope with various physique differences. is there. If the cushioning material is too thin, it may bottom out, and if it is too hard, it will not fit the body well.

  The second one uses a net or canvas instead of the substrate. In particular, if you use a stretchable net, it fits the shape of the body and follows the movement of the body, keeping a suitable sitting comfort, but due to the structure, the net and canvas are always in tension A material to hold is needed. However, the frame material may hit the body at the front edge of the seat, the upper end of the backrest, or the like, and may feel uncomfortable. In addition, in order to avoid hitting, it is not possible to obtain a sufficient support area with the thing made by escaping this part. Furthermore, if there is a hole in the net, it must be replaced immediately.

  The third one should be said to be intermediate between the first one and the second one. By providing an opening in the substrate made of plastic resin, the strength of the substrate is reduced, and when the weight is applied, the substrate It is intended to obtain cushioning properties by utilizing the bending. However, with such a substrate, it is difficult to set which part has a cushioning property, and the deflection of the boundary between the open part and the non-open part is small, and the opening The deflection of the central part is large, and the deviation becomes a problem.

  An object of the present invention is to provide a backrest board for a chair that can fit a seated person's body with a simple structure and can appropriately support the body comfortably following the movement of the body. It is said.

According to the present invention, the above problem is solved as follows.
(1) A chair backrest substrate made of plastic and having flexibility, and is partially flexible by providing a combination of a number of flexure holes having different shapes for imparting flexibility. Make them different.

  (2) In the above item (1), it is assumed that the flexure hole includes a plurality of types having different sizes.

  (3) In the above item (1) or (2), the flexible hole includes an elongated long hole facing a certain direction, and the flexibility is partially varied by varying the length.

  (4) In any one of the above items (1) to (3), the flexure hole includes a plurality of types of reference holes having a reference shape and elongated holes having a shape in which a plurality of reference holes are continuously arranged on a straight line. Shall.

  (5) In the above item (4), the reference shape of the reference hole is a single nodule shape, and the long hole is a saddle shape or dumpling shape in which a plurality of the reference shapes are continuously arranged on a straight line.

  (6) In any one of the above items (1) to (5), the flexure holes are arranged in a plurality of rows, and the flexure holes in rows adjacent to each other are arranged in a staggered manner with the positions shifted. .

According to the present invention, the following effects can be achieved.
According to the first aspect of the present invention, by providing a combination of a large number of flexure holes having different shapes for imparting flexibility, flexibility can be imparted to a plastic substrate that is not inherently flexible. Not only can the size of the flexibility be partially different, it can fit the occupant's body with a simple structure and follow the movement of the body appropriately. Can be supported comfortably.

  According to the invention described in claim 2, since the flexure holes include a plurality of types having different sizes, it is possible to change the distribution ratio between the large flexure holes and the small flexure holes by changing the distribution ratio of the flexure holes. The size can be easily different from other parts.

  According to the third aspect of the present invention, the flexible hole includes an elongated long hole facing a certain direction, and the flexibility is partially varied by changing the length thereof. The size of the property can be easily determined based on the length of the flexure hole, and the uniformity can be given to the flexure holes to improve the appearance.

  According to the inventions of claims 4 and 5, the flexure hole is composed of a plurality of types of reference holes having a reference shape and elongated holes having a shape in which a plurality of reference holes are continuously arranged on a straight line. The hole can be defined as one unit and the length of the long hole can be easily determined as an integral multiple thereof, and each bending hole can be made uniform to improve the appearance.

  According to the invention described in claim 6, the flexure holes are arranged in a plurality of rows, and the flexure holes in the rows adjacent to each other are arranged in a staggered manner in which the positions are shifted. Compared to the case, the flexibility in the direction orthogonal to the row of the flexure holes is increased, and a smooth flexibility that is uniform in the vertical direction and the horizontal direction is obtained.

FIG. 1 shows a first embodiment of the present invention.
The backrest substrate (1) has a number of corrugated belts that are horizontally oriented and are arranged at regular intervals across the left and right side ridges (3) and (3) of the plate-like frame (2). The plate (4) is provided and is a plate-like material made of plastic.

  The width, waveform, wave height, wave pitch, vertical spacing, etc. of the strip (4) may all be the same, but especially in the waist where the load is high, the rigidity is greater than in other parts. It is desirable to set the above requirements.

  A general plate-shaped substrate formed by molding plastic is not substantially flexible. However, according to the substrate (1) shown in FIG. When the load is applied, the belt-like piece (4) at that portion is stretched to bend and be able to comfortably support the seated person's body.

  In the region where it is desired to increase the rigidity by reducing the flexibility in the substrate (1), the adjacent chevron portions of the strips (4) and (4) arranged vertically are connected to each other in the vertical direction ( 5).

  The uppermost and lowermost strips (4), and the upper side ridge (6) and lower side ridge (7) of the frame (2) each have a plurality of support pieces (8) facing vertically. Are connected.

  Depending on the presence or absence of the connecting piece (5), the extension of the strip-like piece (4) at that location, and hence the flexibility, will be different, and the back of the seated person can be supported in the most preferable compressed state.

  That is, in the portion of the board (1) that is to be greatly bent, for example, the portion where the seated person's waist or shoulder hits, the number of connecting pieces (5) in the vertical direction is reduced and the load needs to be strongly supported. The number of connecting pieces (5) can be increased so that various portions of the back surface of the body can be supported in the most preferable state and can be suitably adapted to the overall shape of the back surface of the body.

  According to this embodiment, the adjacent chevron portions of the strips (4) and (4) arranged in the vertical direction are coupled together by the coupling strip (5), and the top and bottom strips (4) and the frame By connecting the upper reed (6) and the lower reed (7) of the part (2) with a plurality of support pieces (8) facing vertically, the substrate (1) is made flexible. A large number of flexure holes (a1) (a1 ′) (a2) (a2 ′) having different shapes for application are formed.

The flexure hole (a1) is a reference hole and has a single nodule shape, in this example, a regular hexagonal reference shape.
The bending hole (a2) is a bowl-shaped long hole in which two reference holes (a1) are continuously arranged on a straight line.
The bending holes (a1 ′) (a2 ′) are half holes obtained by dividing the bending holes (a1) and (a2) into two.

  In the example shown in FIG. 1, the bending holes (a1) as reference holes are arranged in a line in the vertical direction at the center and both sides in the left-right direction of the substrate (1), and between them, A plurality of bowl-shaped flexure holes (a2) facing in the left-right direction are staggered with their positions shifted in the left-right direction by half the pitch of the flexure holes (a1), which are reference holes, between rows adjacent vertically. In addition, a halved bending hole (a1 ') is provided in the portion adjacent to the left and right side ridges (3) and (3) of the outermost frame portion (2) in the left and right direction, and the most vertically extending direction. In the outer frame portion (2), a half-divided bending hole (a2 ') is provided in a portion adjacent to the upper horizontal rod (6) and the lower horizontal rod (7).

  Therefore, a portion with increased rigidity is formed at the center of the board (1) with which the seated person's spine abuts and on both sides of the board (1) that supports both sides of the seated person. A portion having high flexibility is formed, and rigidity and flexibility are intermediate between the upper and lower sides (6) and (7) of the frame (2). A comfortable fit is obtained when the portion is formed and the seated person falls into the board (1).

  Further, in the example shown in FIG. 1, the bent holes (a1) (a1 ') (a2) (a2') are the smallest in the center, and form a similar shape that is slightly larger as they move up and down. By doing so, the rigidity of the central portion of the substrate (1) is kept to some extent.

  The substrate (1) is advantageous in terms of manufacturing and cost because it can be formed by integrally molding plastic or by stamping a plastic plate.

  FIG. 2 shows another embodiment of the present invention. Instead of the connecting piece (5) in the vertical direction in FIG. 1, the desired opposing chevron portions in the corrugated strips (4) and (4) adjacent in the vertical direction are shown. Connect the two with separate connecting members (9), and connect the upper and lower strips (4) with the upper side (6) and lower side (7) of the frame (2). These are connected by a plurality of support members (10) facing in the vertical direction.

  By attaching or removing the connecting member (9) to or from a desired location, the flexibility at various locations on the substrate (1) can be changed.

  In the example shown in FIG. 2, by providing the connecting member (9) and the supporting member (10) in the arrangement as shown in the drawing, the substrate (1) has a large number of flexures having different shapes for imparting flexibility. The holes (a1) to (a7) are formed in a staggered arrangement in which the positions are shifted in the left-right direction by a multiple of a half pitch of the flexure holes (a1) which are the reference holes between the vertically adjacent rows. .

The flexure hole (a1) is a reference hole and has a single nodule shape, in this example, a regular hexagonal reference shape.
The flexure holes (a2) to (a7) have straight holes for the reference holes (a1) for 1, 5, 2, 2, 5, 3, 4, and 6 respectively. It is a long hole in the shape of a dumpling that is continuous with (including some that are slightly missing).

  The flexibility of the substrate (1) is partially varied by appropriately combining a large number of flexure holes (a1) to (a7) having different lengths in the left-right direction.

  In the example shown in FIG. 2, the portion of the substrate (1) that is to be largely bent, for example, the portion that needs to strongly support the load while reducing the number of connecting members (9) in the central portion where the back of the seated person hits, For example, by increasing the number of connecting members (9) and supporting members (10) between the upper and lower parts and both side parts, the flexibility is partially different, and various parts of the back surface of the body are supported in the most preferable state. And can be suitably adapted to the overall shape of the back surface of the body.

3 and 4 show a preferred example of the connecting member (9).
The connecting member (9-1) shown in FIG. 3 is a hook piece (1) which is opposed to each other on one side of the vertical support piece (11) and can be fitted and locked into the chevron of the corrugated strip piece (4). 12) (12) is provided.

  The connecting member (9-2) shown in FIG. 4 is a slightly flexible two-piece piece in which the middle portions in the vertical direction are connected by a piece (13) that is slightly wider than the thickness of the strip (4). The upper and lower ends of the vertical support pieces (14) and (14) are provided with locking projections (15) and (15) that face each other with an interval slightly smaller than the thickness of the strip piece (4).

5 and 6 show a preferred example of the support member (10).
The support member (10-1) shown in FIG. 5 is a hook that can be fitted and locked into the angled portion of the strip piece (4) at the lower end and the plug piece (17) at the upper end of the vertical support piece (16). A piece (18) is provided.

  After the hook piece (18) is locked to the chevron of the belt-like piece (4), the insertion hole (17) is formed in the support hole (19) drilled in the upper side hook (6) or the lower side hook (7). The support piece (10-1) is attached by being fitted to.

  The support member (10-2) shown in FIG. 6 is formed by connecting the middle portions in the vertical direction with a gap piece (20) that is slightly wider than the thickness of the strip (4) and the upper reed (6). The upper ends of two flexible vertical supports (21) and (21) have hemispherical protrusions (22) and (22) that face each other with a slightly smaller distance than the thickness of the upper reed (6). Further, locking projections (23) and (23) are provided which are opposed to each other with a slightly smaller interval than the thickness of the strip (4).

  Insert the opposing vertical struts (21) and (21) into the upper reed (6) from below (or the lower reed (7) from above) and insert the hemispherical protrusions (22) and (22) The support member (10-2) is attached by engaging with the front and back edges of the support hole (19) drilled in the flange (6).

  In each of the above embodiments, the strip (4) may be provided in the vertical direction. In this case, the connecting piece (5), the supporting piece (8), the connecting member (9), and the supporting member (10) are directed in the left-right direction.

It is a back perspective view showing an example of a chair provided with a 1st embodiment of a substrate for backrest by the present invention. It is a back perspective view showing an example of a chair provided with a 2nd embodiment of a substrate for backrest by the present invention. It is a perspective view which shows an example of a connection member. It is a perspective view which shows the other examples of a connection member. It is a perspective view which shows an example of a supporting member. It is a perspective view which shows the other example of a supporting member.

Explanation of symbols

(1) Board
(2) Frame
(3) Acupuncture
(4) Strip
(5) Connecting piece
(6) Upper recumbent
(7) Lower recumbent
(8) Support piece
(9) (9-1) (9-2) Connecting member
(10) (10-1) (10-2) Support member
(11) Vertical support
(12) Fragment
(13) Spacing piece
(14) Vertical support
(15) Locking protrusion
(16) Vertical support
(17) Plug-in plug
(18) Fragment
(19) Support hole
(20) Spacing piece
(21) Vertical support
(22) Hemispherical protrusion
(23) Locking protrusion
(a1)-(a7) Deflection hole

Claims (6)

  A flexible chair backrest substrate made of plastic, wherein a plurality of flexure holes with different shapes for providing flexibility are provided in combination to make the flexibility partially different. A chair backrest board characterized by that.   2. The chair backrest board according to claim 1, wherein the flexure hole includes a plurality of types of holes having different sizes.   3. The chair back according to claim 1 or 2, wherein the flexible hole includes an elongated long hole facing a predetermined direction, and the flexibility is partially changed by changing the length thereof. substrate.   4. The flexible hole according to any one of claims 1 to 3, wherein the bending hole is composed of a plurality of types of a reference hole having a reference shape and a long hole having a shape in which a plurality of reference holes are continuously arranged on a straight line. The backrest board for the chair described.   5. The backrest of a chair according to claim 4, wherein the reference hole has a standard shape of a single nodule, and the long hole has a bowl shape or a dumpling shape in which a plurality of the reference shapes are continuously arranged on a straight line. substrate.   The chair according to any one of claims 1 to 5, wherein the flexure holes are arranged in a plurality of rows, and the flexure holes in rows adjacent to each other are arranged in a staggered manner with their positions shifted. Backrest board.

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