WO2003009726A1

WO2003009726A1 - Seat part structure of chair

Info

Publication number: WO2003009726A1
Application number: PCT/JP2002/006966
Authority: WO
Inventors: Yoichi Inaba
Original assignee: Yoichi Inaba
Priority date: 2001-07-24
Filing date: 2002-07-09
Publication date: 2003-02-06

Abstract

A seat part structure of a chair capable of preventing a hip from getting a pain even if the chair is used for long period by taking into account the specificity of an ischial bone portion, wherein recessed parts (3) and (3) are formed in the bearing surface (11) of the seating part (1) of the chair at positions allowing both the right and left side projected parts of the ischial bones to abut thereon so that a contact pressure of the right and left side projected parts of the ischial bones with the bearing surface (11) becomes less than that with the other portions, and removable cushions (8) and (8) for depressurization are fitted into the recessed parts (3) and (3), the cushions (8) and (8) for depressurization prepared in different thicknesses and hardnesses being used to match a pressure at the right and left side projected parts of the ischial bones to an individual taste and replaced according to the taste, whereby the smooth decompressing effect at the projected parts of the ischial bones can be provided and use feeling can be improved.

Description

Description Chair seat structure Technical field

The present invention relates to a seat structure for a chair in which the buttocks do not hurt even when sitting for a long time.

Background art

In general, high-grade chairs are soft and very thick, making them comfortable and comfortable, but ordinary chairs are not. In other words, in ordinary chairs, there is no kukusyon at all, or it is just about to be added, and I have always experienced that my ass hurts when I sit for a long time. For that reason, I often use a cushion on a chair. Recently, computer design chairs have been developed under the name of ergonomics and have been treated as if they had solved any problem.

However, the problem has not yet been solved. In other words, the problem of a chair whose hips do not hurt even after sitting for a long time remains unsolved. So where is the painful area in the buttocks when sitting in a hard chair for a long time?

When you take the shape of the whole muscle in the sitting position, it looks like a heart shape with a beautiful aspect, and it looks as if the pressure is well-balanced throughout. However, anatomically, when sitting, the left and right sciatic projections protrude from the surroundings, and there is only thin skin and subcutaneous tissue on the protruding bone, so the cushioning effect is poor. The weight that was taken was not well dispersed, Very high pressure is applied only to the part. Therefore, if you sit in a hard chair for a long time, the area will hurt. In comparison, the surrounding area is the most cushioned part of the whole body, called the buttock, which is covered with extremely abundant subcutaneous tissues, including adipose tissue, and the weight on that part is extremely high. This area is less likely to hurt even when sitting in a hard chair for a long time because it is effectively dispersed. Therefore, there is not much need to put a cushion on this area.

Disclosure of the invention

The present invention has been made in order to solve the above-mentioned problems of the prior art, and in consideration of the specificity of the ischial portion, a seat structure of a chair that does not hurt the hips even after long use. The purpose is to provide.

Therefore, in the seat structure of the chair of the present invention, the seat is configured such that the contact pressure between the left and right ischial projections and the seat surface is equal to or less than that of the other portions.

Specifically, a hole is made at the position where the left and right sciatic projections hit, so that the contact pressure between the right and left sciatic projections and the seat surface is less than that of the other parts. By providing a concave portion at a position where the both sciatic projections abut, the contact pressure between the left and right sciatic projections and the seating surface is made equal to or less than the other parts. Furthermore, by making the portion where the left and right sciatic projections come into contact with cushion material that has less repulsion than the other parts, the contact pressure between the left and right sciatic projections and the seat surface is about the same as the other parts. Or, configure it to be less.

As described above, the contact pressure between the left and right By configuring the seat so that it is the same as or less than the part, pressure is not concentrated on the left and right sciatic projections that protrude compared to other parts and have thin subcutaneous fat. But my ass doesn't hurt.

Specifically, by making a hole at the position where the left and right sciatic projections hit, the contact pressure between the left and right sciatic projections and the seating surface is less than the other parts, so that the actual sitting When the left and right sciatic projections fit into the holes, they become supported by other parts, and therefore, there is almost no pressure on the left and right sciatic projections, which have less subcutaneous fat than other parts, The ass does not hurt even after long use.

In addition, by providing a concave portion at the position where the left and right sciatic projections touch, the contact pressure with the seat surface at the left and right sciatic projections is set to be equal to or less than the other parts As a result, the left and right sciatic projections are stuck in the recess when actually sitting, so that they are mainly supported by other parts, and therefore, pressure is applied to the left and right sciatic projections where subcutaneous fat is thinner than other parts. Eliminates little or little pain, so your ass will not hurt after prolonged use.

Furthermore, by making the portion where the left and right sciatic projections abut against a cushion material having a lower repulsive force than the other portions, the contact pressure between the left and right sciatic projections and the seating surface is equal to or equal to that of the other portions. The left and right sciatic projections are more easily submerged than the surroundings when they are actually seated, so they are supported mainly by the periphery, and there is little pressure on the left and right sciatic projections. The butt will not hurt even after prolonged use. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a perspective view showing a seat structure of a chair according to a first embodiment.

FIG. 2 is a perspective view showing a seat structure of the chair of the second embodiment.

FIG. 3 is a perspective view showing a seat structure of a chair according to a third embodiment.

FIG. 4 is a perspective view showing a seat structure of a chair according to a fourth embodiment.

FIG. 5 is a perspective view illustrating a seat structure of a chair according to a fifth embodiment.

FIG. 6 is a plan view showing a seat structure of a chair according to a sixth embodiment.

FIG. 7 is a cross-sectional view taken along line VII-VII of FIG.

FIG. 8 is a cross-sectional view taken along line II-III of FIG.

FIG. 9 is a cross-sectional view taken along line IX-IX of FIG. .

FIG. 10 is a perspective view showing a seat structure of a chair according to a seventh embodiment.

FIG. 11 is a plan view showing a seat structure of a chair according to an eighth embodiment.

FIG. 12 is a cross-sectional view taken along line XII—XII in FIG.

BEST MODE FOR CARRYING OUT THE INVENTION

To solve the problem of a chair that does not hurt the hips even after sitting for a long time, reduce the pressure on the left and right sciatic projections, which are the places where the most pressure is applied, or devise that it does not apply at all So, how do you reduce the pressure on the right and left sciatic projections? Simply put, it is better not to support the weight at those parts. The easiest way to do this is to make a hole or a recess at the position where the part hits, and if the part fits into the hole or the recess, the weight will be supported mainly around it, resulting in When there is no more pressure, there is a station.

When you are in a sitting position, the sciatic projection projects one at a time to the left and right. There must be two holes and recesses, one each for the left and right, or one hole or recess that can accommodate both the left and right ischial projections. This intermediate type is a hole or recess into which both the left and right sciatic projections can be inserted, lowering the part between the perineum and the left and right ischioid projections, which we medically call, by one step. A two-stage hole or recess with another step down is also considered as an application example. However, when we actually prototyped a chair with holes and recesses for decompression and sat down, the sciatic projections fit into the holes and recesses, and the entire buttocks sink a little, and the overall results are negligible. Is inclined backward. As a result, the coccyx hits the seat of the chair, giving a sense of incongruity. Therefore, in order to avoid this, the front part of the seat pressure relief holes and recesses should be slightly lower, so that the reclined posture is correct and the coccyx is slightly lower than the surrounding area. Need to be If the coccyx is slightly lower than the surrounding area, a hole or recess may be made in the same place where the coccy bone touches the seating surface, or may be one step lower than the surrounding area. In other words, in order to reduce the pressure on the left and right ischial projections, the purpose is achieved only by providing holes and recesses, but it is incomplete as a chair, and in addition to this, the overall shape of the seat surface of the chair You also need to think.

The distance between the left and right sciatic projections varies among individuals, but the distance is about 1 O cin, and the hole, position and size may be determined in consideration of the value of 1 O cm. Of course, the size of these holes and recesses is large enough to accommodate the left and right ischial projections, but the depth of the recesses is set so that the tips of the left and right ischial projections do not touch the bottom of the recesses. When actually sitting, there are cases where the person sits deeply and a person who sits shallowly. Therefore, it is convenient to make these holes and recesses long in the front-rear direction to cope with them.

When creating a hole or a turn in a chair, there is almost no cushion on the chair If the cushion is not provided at all, it is provided on the chair seat plate, but if the cushion is thick enough, it is provided only on the cushion.If it is provided only on the bottom plate below the chair cushion, it is provided on both the bottom plate and the cushion. It is possible.

If the chair has a hole and there is nothing to support the sciatic projection, cover the hole with a resilient material such as rubber so that the sciatic projection serves as a cushion.

If a recess is provided in the chair, a removable cushion should be fitted in accordance with the recess, and various types of cushions can be selected according to personal preference and body type. Not only will the smooth decompression effect and the feeling of use improve, but a system chair that can be customized according to the order will be created. The cushion itself is a bag made of a plastic material such as vinyl chloride or urethane and filled with air, water, or a gel-like highly viscous substance.

Made of sponge or sponge-like substance

Using spring

A bag filled with a fibrous material like cotton like a cushion

Soft small balls packed in a bag

And so on.

Also, according to personal preference, holes and recesses can be covered with lids so that the sciatic projections do not sink, and as an advanced type, not only the size of the holes and recesses but also the depth as well as the size of the aperture of the camera It can be adjusted freely, or it can be removed and replaced with a cap for the decompression hole that forms a recess, depending on the purpose, such as a hole or a mesh on a hot day. If you can make various changes, such as changing to a chair with a good heat insulation property on a cold day, it will be a chair that can be adjusted more finely <Another way to reduce the pressure on the sciatic projection One method is to make the left and right ischial projections of the cushion sink more easily than the surroundings when sitting. In this method, instead of the holes and recesses described above, only the portions where the left and right sciatic projections of the cushion are in contact are made of a material having a low repulsive force. This can reduce the high pressure applied to these portions. The cushion may be any cushion that is effective as the cushion described above.

The present invention will be described in more detail with reference to the accompanying drawings.

In order to solve the problem of a chair that does not hurt the buttocks even when sitting for a long time, he said that it would be better to reduce the pressure on the left and right sciatic projections, which are the places where the most pressure is applied. As shown in Fig. 1 (a perspective view showing the first embodiment), the force to open the pressure relief holes 2 and 2 at the position where the left and right sciatic projections on the seat 1 of the chair come into contact, or As shown in (perspective view showing the second embodiment), if the recesses 3 and 3 are provided and the portions fit into the pressure-reducing holes 2 and 2 and the recesses 3 and 3, the weight is mainly supported around the periphery. So, as a result, there is no pressure.

As for the decompression holes 2, 2 and recesses 3, 3, the sciatic projection protrudes left and right one by one when in the sitting position. As shown in Fig. 3 (perspective view showing the third embodiment) or Fig. 4 (perspective view showing the fourth embodiment), a pressure-reducing hole 2 1 with both left and right sciatic projections is inserted. And one recess 31 is required. The distance between the left and right sciatic projections varies among individuals, but the distance is about 1 Ocm. The position and size of the depressurizing holes 2, 2, 21 and (Ml portions 3, 3, 31 may be determined in consideration of the value of 1 O cm of the above.

Further, as shown in FIG. 5 (a perspective view showing the fifth embodiment), the pressure-reducing holes 2 and 2 are opened in the seat portion 1 of the chair, and the bowl-shaped pressure-reducing hole caps 4 and 4 are fitted. The positions of the pressure-reducing holes 2, 2 are set at positions where the left and right ischial projections hit when sitting. The size of the decompression holes 2 and 2 is such that the left and right sciatic projections can fit, and the depth is designed so that the tip of the sciatic projection does not touch the bottom of the decompression hole caps 4 and 4 when actually sitting. . For this purpose, it is desirable to prepare several kinds of caps 4 and 4 having different depths as pressure-reducing hole caps 4 so that they can be replaced as desired.

Also, when actually sitting, there are cases where you sit deeply and cases where you sit shallowly. Therefore, FIGS. 6 to 9 (a plan view showing the sixth embodiment, a sectional view taken along line VII-VII in FIG. 6, a sectional view taken along line ΠΧ-ΠΧ in FIG. 6, and a sectional view taken along line IX-IX in FIG. 6) As shown in (1), it is desirable that the recesses 3 and 3 (or the pressure-reducing holes 2 and 2) be made long in the front-rear direction so as to be able to cope with them. But there is something that needs to be added here. As mentioned above, when sitting in a chair with recesses 3 and 3, the sciatic projections fit into the recesses 3 and 3 (or the decompression holes 2 and 2), and the entire buttocks sink a little, As a result, it will be slightly inclined backward. As a result, the coccyx hits the seat of the chair 1 and gives a sense of discomfort. Therefore, in order to avoid this, the portions 5, 5 in front of the recesses 3, 3 (or the pressure-reducing holes 2, 2) of the seat portion 1 are slightly lowered so that the backward tilting posture becomes the correct posture. In addition, the tailbone needs to be slightly lower than the surrounding area. If the coccyx is slightly lower than the surrounding area, the recesses 7 and 7 (or the decompression holes 6 and 6) are also provided in the area where the coccyx touches the seating surface. May be opened or one step lower than the surrounding area.

As another contrivance, as shown in FIG. 10 (a perspective view showing the seventh embodiment), detachable depressurizing cushions 8 and 8 are fitted into the concave portions 3 and 3, respectively. These decompression cushions 8 and 8 are used to adjust the pressure of the left and right sciatic projections to the preference of the individual.Those with different thicknesses and hardnesses should be prepared and replaced according to preference. Is desirable. As a result, the smooth decompression effect of the sciatic projection and the feeling of use are improved. The depressurizing cushions 8, 8 are made of a bag made of plastic material such as vinyl chloride or urethane and filled with air, water, or a gel-like highly viscous material, or a sponge-sponge-like material. Anything can be used, such as a garment, a spring, a bag filled with fibrous material such as cotton, like a cushion, or a small soft ball packed in a bag.

The present invention has the structure as described above, and when actually sitting, the left and right ischial projections fit into the recesses 3 and 3 (or the pressure-reducing holes 2 and 2), and the weight is not applied there, and the surrounding area is accordingly reduced. Although it takes weight, it is dispersed by the high cushioning effect of the buttocks itself, so that the hips do not hurt when sitting for a long time. Another way to reduce the pressure on the sciatic projection is to make the left and right sciatic projections of the cushion sink more easily when sitting. In this method, instead of the expulsion holes 2 and 2 and the recesses 3 and 3 above, only the area where the left and right sciatic projections of the cushion are in contact is made of a material with low repulsive force. Even if not as high as the pressure relief holes and recesses described above, it can be reduced to some extent.

As an application example, in a chair without a backrest, for example, when the seat surface 11 of the seat 1 is circular, the seating position is not constant, In many cases, the left and right ischial projections are located at about 23 from the center of the seating surface 11, and in this case, concentric pressure relief holes or recesses are provided at this position, or Figs. As shown in 2 (a plan view showing the eighth embodiment, a cross-sectional view taken along the line XII-XII in FIG. 11), by using a material 9 having a low repulsive force, the sciatic projection can be placed in any position. Pressure can be reduced.

Although the embodiments and examples of the present invention have been described above, the present invention is not limited to these, and any changes in design or the like that do not depart from the gist of the present invention are included in the present invention.

For example, it can be used for all kinds of purposes, such as chairs for ordinary households and offices, chairs for transportation such as aircraft and railways, chairs for public halls such as theaters, and bicycle saddles.

Claims

The scope of the claims

1. The seat structure of the chair, characterized in that the seat is configured such that the contact pressure between the left and right ischial projections and the seat surface is equal to or less than that of the other parts.

2. By making a hole at the position where the right and left sciatic projections hit, the contact pressure between the left and right sciatic projections and the seat surface is less than that of the other parts. The seat structure of the chair according to claim 1.

3. By providing a recess at the position where the left and right sciatic projections are in contact, the contact pressure between the left and right sciatic projections and the seat surface should be the same as or less than the other parts. The seat structure of the chair according to claim 1, which is characterized in that:

4. The part where the left and right sciatic projections come into contact with each other is made of a cushioning material that has less repulsive force than the other parts, so that the contact pressure between the left and right sciatic projections and the seating surface is the same as that of the other parts. 2. The chair seat structure according to claim 1, wherein the chair seat structure is configured to be less than that.