JP3190627U - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair capable of reducing pressure contact between a spine and a coccyx when a seated person is seated, and significantly reducing a feeling of fatigue even when seated for a long time. SOLUTION: A chair 1 has a seat portion 2 and a backrest 4, and a spine avoidance recess 4a is formed in the backrest 4 corresponding to the position of the spine of a seated person, and a seated person is formed in the seat portion 2. A coccyx avoidance recess 2a is formed between the backrest side and the anterior side corresponding to the position of the coccyx. The spine avoidance recess 4a and the coccyx avoidance recess 2a are formed at the central portions of the backrest 4 and the seat portion 2 in the width direction, respectively, and the cushion bodies 7 and 8 are detachably embedded in these recesses. [Selection diagram] Fig. 1

Description

  The present invention relates to a chair having a seat portion and a backrest, and more particularly to a chair in which a seat portion and a backrest are formed with a recess corresponding to a spine and a scapula of a seated person.

  The chair is required to have good sitting comfort when a seated person sits on the seat, and no fatigue or pain is felt even when seated for a long time, and various improvements have been made. Regarding the chair back, Japanese Patent No. 3438078 (Patent Document 1) discloses a backrest plate for correction installed in a backrest portion of a car seat, and a central vertical recess is formed on the backrest plate. It has been disclosed to correct the spine by keeping the spine in a straight, close to standing position so that the spine does not hit the corrective backrest. In Japanese Utility Model Publication No. 60-2531 (Patent Document 2), a longitudinal groove is formed in the center of the cushion, a pressing ridge is embedded in the groove, and the spine is pressed into the pressing ridge. It is described to correct.

Japanese Patent No. 3438078 Japanese Utility Model Publication No. 60-2531

  In Patent Documents 1 and 2, the spine is corrected by a longitudinal groove formed in the backrest or cushion. For this reason, when the back is placed against the backrest, the protruding spine will abut against the longitudinal groove, and the abutment surface pressure will be higher than the abutment surface pressure of the part where the other part of the back hits However, since discomfort and pain occur mainly in the pressing spine, there is a problem in that, after all, it is not possible to obtain a good sitting comfort, and when the user sits for a long time, a feeling of fatigue or pain is generated. In addition, when sitting on a chair, the spine abuts against the backrest, while the tailbone abuts against the seat portion particularly when seated shallowly, which also causes fatigue and pain. The backrest and cushion disclosed in No. 2 are not considered for this problem.

  On the other hand, a normally used chair is not limited to a seated person who needs to correct the spine, and a normal person uses it in a normal way. In this case, the chair in which the groove for correction is formed is uncomfortable for the ordinary person. For this reason, there arises a problem that two chairs for spine correction and two chairs for healthy persons must be prepared.

  The problem to be solved by the present invention is to provide a chair that can be used by both a seated person and a healthy person who need to avoid the spine and tailbone.

  Therefore, the chair according to the present invention is a chair having a seat portion and a backrest, and the backrest is formed with a spine avoidance recess corresponding to the position of the spine of the seated person, and the seat portion includes: A coccyx avoidance recess corresponding to the position of the seated person's coccyx is formed between the backrest side and the anterior side, and a recess cushion body is attached to and detached from the spine avoidance recess and coccyx avoidance recess. Buried as possible.

  Further, the hardness of the cushion body for the recess may be different from the seat portion and the backrest of the chair of the main body.

  In the chair according to the present invention, the spine avoidance recess is formed in the backrest corresponding to the position of the spine of the seated person, so that the spine enters the spine avoidance recess when the seated person sits down. Can be avoided and the feeling of fatigue and pain can be greatly reduced. Furthermore, since the coccyx avoidance recess is formed in the seat portion corresponding to the position of the seated person's coccyx, pressure contact with the coccyx can be avoided, and fatigue and pain can be greatly reduced. In addition, since the cushion body for the recess is detachably embedded in the spine avoidance recess and the coccyx avoidance recess, a healthy person who does not need spine correction etc. can use it as a normal chair. A wide range of seats can be used arbitrarily depending on the purpose of use of the chair.

  In addition, by making the cushion body for the recess different from the seat portion of the chair of the main body and the backrest, the cushion body hardness can be used for either a seated person who needs spine correction or the like or a healthy person. By making different, it becomes possible to provide a chair with good sitting comfort.

  It is a perspective view which shows the Example of the chair concerning this invention.   It is a top view of the chair shown in FIG.   It is a side view which shows the state where the seated person sat down on the chair.   It is a top view which shows the state in which the seated person sat down on the chair.   It is a side view which shows the state where the seated person sat down on the chair without a cushion.

  The chair according to the present invention is a chair having a seat portion and a backrest, and the backrest is formed with a spine avoidance recess corresponding to the position of the spine of the seated person, and the seat portion has a seated person. The coccyx avoidance recess corresponding to the position of the coccyx is formed between the backrest side and the front side, and the cushioning body for the recess can be attached to and removed from the spine avoidance recess and the coccyx avoidance recess Buried.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. A chair 1 shown in FIGS. 1 and 2 includes a seat portion 2, four leg portions 3 that support the seat portion 2, a backrest 4 erected from the rear end of the seat portion 2, and an armrest 5. Have. The seat portion 2 is formed in a substantially rectangular shape, and a cushion structure such as urethane foam or urethane chip is accommodated on the upper surface, and the surface is covered with a cloth, leather, resin sheet or the like. Further, the backrest 4 has a cushion structure similar to that of the seat portion 2.

  A vertically long spine avoidance recess 4a extending in the vertical direction is formed at the center of the backrest 4 in the lateral width direction. This spine avoidance recess 4a is formed at a position corresponding to the spine of the seated person 6, and is wider than the width of the spine. Further, the spine avoidance recess 4a is formed to be short so that the upper portion does not reach the upper end of the backrest 4, and the upper end side of the backrest 4 communicates therewith, so that the backrest 4 is not divided by the spine avoidance recess 4a. , Ensuring the strength as a chair, and maintaining durability. The lower part of the spine avoidance recess 4 a reaches the rear part of the seat part 2. The spine avoidance recess 4a shown in FIGS. 1 and 2 is formed so as to penetrate the cushion, and the back side is closed by a back plate (not shown) of the backrest 4 to form a recess.

  On the other hand, a rectangular coccyx avoidance recess 2a is formed between the backrest 4 side and the front side in the center of the seat portion 2 in the lateral width direction. The coccyx avoidance recess 2a is formed at a position corresponding to the coccyx of the seated person 6, and is wider than the coccyx. Further, the coccyx avoidance recess 2a is formed to be short so that the front part does not reach the front end of the seat part 2, and, like the backrest 4, the front end side communicates, so that the seat part 2 is divided by the coccyx avoidance recess 2a. Without making it, the strength as a chair is secured and durability is maintained. The coccyx avoidance recess 2a shown in FIGS. 1 and 2 is formed so as to penetrate the cushion, and as shown in FIGS. 3 and 5, the seat 2 is provided with a bottom plate 2b.

  The vertically long spine avoidance recess 4a formed in the center of the backrest 4 in the lateral width direction and the rectangular tailbone avoidance recess 2a formed in the center of the seat portion 2 in the lateral width direction are respectively provided with cushion bodies 7 and 8 for recesses. Is embedded in a removable manner.

  The recess cushion body 7 embedded in the spine avoidance recess 4a is formed in a size that is substantially equal to or slightly larger than the shape of the spine avoidance recess 4a, that is, the length, width, and depth in the vertical direction. Like the backrest 4, a cushion material such as urethane foam or urethane chip is accommodated in the interior of the recess cushion body 7, and the surface is covered with a cloth, leather, resin sheet or other cushion. . The recess cushion body 7 is embedded in the spine avoidance recess 4 a in a light press-fit state, so that the upper surface of the recess cushion body 7 is substantially flat with the surface of the backrest 4. On one end side of the recess cushion body 7, a handle portion 7a for pulling out the buried recess cushion body 7 is attached.

  Further, the recess cushion body 8 embedded in the coccyx avoidance recess 2a of the seat portion 2 is similar to the recess cushion body 7, and the shape of the coccyx avoidance recess 2a, that is, the longitudinal length, width, and The depth is approximately equal or slightly larger. As in the case of the seat portion 2, a cushion material such as urethane foam or urethane chip is housed inside the cushion body 8 for the recess, and the cushion structure is covered with a cloth, leather, resin sheet, or the like. Yes. The recess cushion body 8 is buried in the coccyx avoidance recess 2 a in a light press-fit state, so that the upper surface of the recess cushion body 8 is substantially flat with the surface of the backrest 4. A handle portion 8 a for pulling out the buried recessed cushion body 8 is also attached to one end side of the recessed cushion body 8.

  In addition, although the cushion bodies 7 and 8 for the recesses described above are embedded in the spine avoidance recesses 4a and the tailbone avoidance recesses 2a, they are made to be substantially flat with the backrest 4 and the surface of the seat portion 2, depending on circumstances. May be lower than the backrest 4 and the surface of the seat portion 2. Further, the hardness of the cushion bodies 7 and 8 for the recesses may be made smaller than that of the backrest 4 and the seat portion 2 so that the tailbone and tailbone of the seated person 6 may be depressed. Further, in the above-described embodiment, the shape of the spine avoidance recess 4a formed in the backrest 4 and the tailbone avoidance recess 2a formed in the seat portion 2 are formed in a vertically long or rectangular shape. You may form in polygons, such as a shape and a rectangle. In this case, the recess cushion bodies 7 and 8 are also formed in a shape suitable for the spine avoidance recess 4a and the coccyx avoidance recess 2a.

  Next, the action of the chair 1 in which the bone avoidance recess 4a of the backrest 4 and the coccyx avoidance recess 2a of the seat portion 2 are formed will be described with reference to FIG. As shown in FIG. 5, when the seated person 6 sits deeply on the seat portion 2 of the chair 1 and the angle θ1 between the foot and the torso is almost a right angle, the back of the seated person 6 comes into contact with the backrest 4. At this time, a vertically long spine avoidance recess 4a extending in the vertical direction is formed at the center in the width direction of the backrest 4, and the spine avoidance recess 4a is formed at a position corresponding to the spine of the seated person 6. The spine 6a of the seated person 6 enters the spine avoidance recess 4a, and the pressure contact with the spine 6a is avoided. Thereby, a feeling of fatigue and pain can be reduced.

  On the other hand, when the seated person 6 sits shallowly on the seat part 2 of the chair 1 and the angle between the foot and the torso is increased, the position of the spine 6a of the seated person 6 is lowered, and the tailbone 6b of the seat part 2 is Move the dimension forward. Even in this state, since the coccyx avoidance recess 2a is formed between the backrest 4 side and the front side, the coccyx 6b can enter the coccyx avoidance recess 2a and avoid pressure contact with the coccyx 6b.

  If the seated person 6 is a healthy person and the spine avoidance recess 4a of the backrest 4 and the tailbone avoidance recess 2a of the seat portion 2 are unnecessary, as shown in FIGS. 1 to 4, The recess cushion bodies 7, 8 are embedded in the spine avoidance recess 4a and the coccyx avoidance recess 2a, respectively. That is, as indicated by an arrow in FIG. 1, the recess cushion body 7 is embedded in the spine avoidance recess 4 a of the backrest 4 until it is substantially flat with the surface of the backrest 4. Further, the recess cushion body 8 is embedded in the coccyx avoidance recess 2 a of the seat portion 2 until it is substantially flat with the surface of the backrest 4.

  By embedding the cushion bodies 7 and 8 for the recesses in the spine avoidance recess 4a and the coccyx avoidance recess 2a, respectively, as shown in FIGS. 3 and 4, it can be used as a normal chair. Therefore, a single chair can be used arbitrarily for any seated person depending on the purpose of use.

  Further, when the spine avoidance recess 4a of the backrest 4 and the coccyx avoidance recess 2a of the seat portion 2 are required, it is easily removed by pulling out the handle portions 7a, 8a attached to the cushion bodies 7, 8 for the recess. be able to.

  Although the present invention has been specifically described above based on the embodiments, it is needless to say that the present invention is not limited to the above embodiments and can be variously modified without departing from the gist thereof. In the above-described embodiment, the backrest and the seat portion may be circular, elliptical, or polygonal other than the square. Further, the spine avoidance recess or the coccyx avoidance recess formed in the backrest and the seat portion may be covered with a chair chair having flexibility.

DESCRIPTION OF SYMBOLS 1 Chair 2 Seat part 2a Tailbone avoidance recess 4 Backrest 4a Spine avoidance recess 6 Seated person 6a Spine 6b Tailbone 7, 8 Cushion body for recess

Claims (2)

A chair having a seat and a backrest,
The backrest is formed with a spine avoidance recess corresponding to the position of the seated person's spine, and the seat portion has a tailbone avoidance recess corresponding to the position of the seated person's tailbone on the backrest side. Formed between the front side,
A chair in which a cushion body for a recess is removably embedded in the recess for avoiding the spine and the recess for avoiding the coccyx.   The chair according to claim 1 or 2, wherein the hardness of the cushion body for the recess is different from that of the seat portion and the backrest.

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