JP2006187665A - Base for backrest of chair and chair including it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flexible 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 following the motion of the body. <P>SOLUTION: The base 1 is formed of plastic and provided with a large number of openings a1-a3 for imparting flexibility. In the base 1, the opening rate at the center part is larger than that on both sides. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a flexible chair backrest board and a chair including the same.

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.

  The present invention provides a flexible backrest board for a chair that can fit a seated person's body with a simple structure and can support the body comfortably and appropriately following the movement of the body. And a chair provided with the same.

According to the present invention, the above problem is solved as follows.
(1) A substrate made of plastic provided with a large number of openings for imparting flexibility, wherein the opening ratio at the center is larger than the opening ratio at both sides.

  (2) A substrate made of plastic provided with a large number of openings for imparting flexibility, wherein the opening ratio of the central part is made larger than the opening ratio of the upper part.

  (3) In the above item (1) or (2), the aperture ratio at the center is larger than the aperture ratio at the lower part.

  (4) A substrate made of plastic provided with a large number of openings for imparting flexibility, wherein the opening ratio of the central part is set larger than the opening ratio of the peripheral part.

  (5) In any one of the above items (1) to (4), the average opening area of the opening provided in the central portion is determined from the average opening area of the opening provided in both side portions, upper portion, lower portion, or peripheral portion. Great.

  (6) In any one of the above items (1) to (5), each opening is a long hole facing a certain direction, and the average length in the longitudinal direction of the opening provided in the center is defined by both sides, the upper part, It is larger than the average length in the longitudinal direction of the opening provided in the lower part or the peripheral part.

  (7) In the above section (6), a plurality of strip-shaped pieces facing in the same direction are integrally provided inside the plate-shaped frame portion made of plastic, and appropriate opposing portions of the strip-shaped pieces adjacent to each other are provided, By connecting with connecting pieces, a longitudinal opening is formed in the front-rear direction and in the same direction as the strip-like piece, and the number of connecting pieces in the central part is determined by connecting pieces in both sides, upper part, lower part, or peripheral part. The average length in the longitudinal direction of the opening in the central portion is made larger than the average length in the longitudinal direction of the openings in the side portions, the upper portion, the lower portion, or the peripheral portion.

  (8) The chair includes a backrest substrate for the chair having flexibility according to any one of the above items (1) to (7).

According to the first to eighth aspects of the present invention, the central portion of the substrate can be bent more greatly than the side portions, the upper portion, the lower portion, or the peripheral portion, so that various portions of the back surface of the body can be supported in the most preferable state. And can be adapted to the overall shape of the back surface of the body.
Accordingly, a flexible chair backrest board that can fit the seated person's body and can support the body comfortably and appropriately following the movement of the body, and the same A chair provided can be provided.

FIG. 1 shows an embodiment of the present invention.
A large number of backrest substrates (1) are arranged in the left-right direction (3), (3) of the plate-like frame portion (2) square in a front view, and are lined up and down at almost regular intervals. A corrugated belt-like piece (4) is provided, which is a plate 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.

  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.

  In a region where it is desired to increase the rigidity by reducing the flexibility in the substrate (1), the adjacent mountain-shaped portions of the strips (4) and (4) lined up and down are connected together in the vertical direction ( 5) By connecting with each other, there are elongated holes (a1) to (a3) that penetrate in the front-rear direction and are elongated in the left-right direction in the same direction as the strip-like piece (4). Is formed. The openings (a1) to (a3) are given the symbols (a1) to (a3) in order from the shortest length in the left-right direction.

  The uppermost and lowermost strips (4) and the upper side (6) and the lower side (7) of the frame (2) each have a plurality of separate vertical surfaces. The support pieces (8) are connected.

  According to this embodiment, depending on the presence or absence of the connecting piece (5), the extension and flexibility of the strip-like piece (4) at that location will differ, and the back of the seated person will be supported in the most preferable compressed state. be able to.

  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.

  In the example shown in FIG. 1, openings (a1) and (a2) having a short length in the left-right direction are concentrated on both side portions in the frame portion (2), and in the central portion between them, The average length of the openings (a2) and (a3) in the center is determined by combining the long opening (a3) in the left-right direction and the middle opening (a2) in combination. It is larger than the average length of the openings (a1) and (a2), so that the opening ratio of the central part is larger than the opening ratios of both side parts, and the central part is more easily bent than both side parts.

  In the example shown in FIG. 1, a plurality of openings (a2) in the form of regular hexagonal nodules having a small opening size are arranged not only on both sides in the frame (2) but also in the center. Are arranged side by side to slightly increase the rigidity of the central portion of the board (1) where the seated person's spine abuts. The relationship between the average length and the aperture ratio is not affected.

  In addition, the openings (a1) to (a3) adjacent vertically are shifted in the left-right direction by the half pitch of the opening (a2) and are arranged in a staggered manner, so that it is compared with a lattice shape. Thus, the flexibility in the direction orthogonal to the row of the openings (a1) to (a3) is increased, and the smoothness that is uniform in the vertical direction and the horizontal direction is obtained.

  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. The upper and lower strips (6) and (7) of the upper and lower strips (4) and the plate-shaped frame (2) are coupled with each other by separate connecting strips (9). ) Are connected to each other by a plurality of support pieces (10) facing in the up-down direction, so that they penetrate through the frame part (2) in the front-rear direction and face in the same direction as the strip-like piece (4). A plurality of elongated holes (a1) to (a7) are formed. The openings (a1) to (a7) are given the symbols (a1) to (a7) in order from the shortest length in the left-right direction.

  By attaching or removing the connecting piece (9) and the supporting piece (10) at desired locations, the lengths in the left and right directions of the openings (a1) to (a7) of each part are changed, and the board (1) The flexibility at each location can be varied.

  In the example shown in FIG. 2, the number of connecting pieces (9) in the central part in the frame part (2) is the upper and lower parts in the frame part (2) and both sides, and therefore the periphery surrounding the central part. By reducing the number of connecting pieces (9) and supporting pieces (10) in the part, the average length of the openings (a1) to (a7) in the central part is set in the upper part, the lower part, both side parts, and the peripheral part. It is larger than the average length of the openings (a1) to (a7), and the opening ratio at the center is larger than the opening ratios of the upper, lower, both sides, and the peripheral part, and the center is bent from the other parts. It is easy.

  As a result, flexibility is imparted to the originally inflexible plastic substrate (1), and the central part of the frame part (2) can be bent more greatly than other parts, so that Each part can be supported in the most preferable state, and can be suitably adapted to the overall shape of the back surface of the body.

  Also, the openings (a1) to (a7) adjacent to each other in the vertical direction are arranged in a staggered manner by shifting the positions in the left-right direction by a half pitch of the openings (a2), as in the embodiment shown in FIG. Therefore, the flexibility in the direction orthogonal to the rows of the openings (a1) to (a7) is increased compared to the case of a lattice shape, and the flexibility is smooth in the vertical and horizontal directions. Is obtained.

  The connecting piece (9) and the supporting piece (10) may be formed integrally with the strip-like piece (4) and the frame portion (2), as in the example of FIG. In this case, the substrate (1) can be easily and inexpensively formed by integrally molding plastic or pressing a plastic plate.

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

  The connecting piece (9-2) shown in FIG. 4 is a slightly flexible piece in which the middle parts in the vertical direction are connected by a piece (13) that is slightly wider than the thickness of the strip piece (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 piece (10).
The support piece (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 piece (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 belt-like piece (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 piece (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 pieces (5) and (9) and the supporting pieces (8) and (10) face 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 piece. It is a perspective view which shows the other example of a connection piece. It is a perspective view which shows an example of a support piece. It is a perspective view which shows the other example of a support piece.

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 piece
(10) (10-1) (10-2) Support piece
(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) to (a7) openings

Claims (8)

  A flexible chair having a plurality of openings for imparting flexibility, the opening ratio of a central part being larger than the opening ratios of both side parts. Backrest substrate.   A backrest of a flexible chair characterized in that it is a substrate made of plastic provided with a large number of openings for imparting flexibility, wherein the opening ratio of the central part is made larger than the opening ratio of the upper part. Substrate.   3. The backrest substrate for a flexible chair according to claim 1, wherein the opening ratio of the central portion is larger than the opening ratio of the lower portion.   A flexible chair having a plurality of openings for imparting flexibility, the opening ratio of a central portion being larger than the opening ratio of a peripheral portion. Backrest substrate.   The average opening area of the opening provided in the central part is larger than the average opening area of the opening provided in both side parts, upper part, lower part, or peripheral part. The board | substrate for backrests of the chair which has the description of flexibility.   Each opening is a long hole facing in a certain direction, and the average length in the longitudinal direction of the opening provided in the center is determined from the average length in the longitudinal direction of the openings provided in both sides, upper part, lower part, or peripheral part. The board for backrest of the chair which has flexibility in any one of Claims 1-5 characterized by the above-mentioned.   A number of strip-shaped pieces facing in the same direction are integrally provided inside the plate-shaped frame portion made of plastic, and appropriate opposing portions of the strip-shaped pieces adjacent to each other are connected to each other by connecting pieces, thereby moving in the front-rear direction. By forming an elongated opening in the same direction as the belt-like piece, and the number of connecting pieces in the central part is smaller than the number of connecting pieces in both sides, upper part, lower part, or peripheral part. 7. The flexibility according to claim 6, wherein an average length in the longitudinal direction of the opening in the portion is made larger than an average length in the longitudinal direction of the opening in the side portions, the upper portion, the lower portion, or the peripheral portion. Chair backrest board.   A chair provided with the substrate for backrests of the flexible chair according to any one of claims 1 to 7.

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