JP2002209664A - Seat for reducing seating pressure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a static seating feeling of the seat and reduce the pressure in the vicinity of a hipbone tuber part affecting on the seating feeling, so as to cope with a variation in a seating position and a change in a seating posture particularly supposed at seating time. SOLUTION: In a seat having a cushion material having a seating part on an upper surface, and a cushion support formed of an inelastic member for being directly placed with the cushion material, this seating pressure reducing seat the cushion support has a hole, and when seating a subject or a 3D mannequin according to JIS-D4607 on the seating part of the cushion material, an area corresponding to a part just under a seating pressure peak generating place of the cushion material is specified, and when setting front and rear partial areas with this specified area as a reference, a lower surface of the cushion material positioned in the front and rear partial areas is arranged so as to be capable of entering the hole of the cushion support.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention aims to improve the static sitting comfort of a seat, and to reduce the pressure near the ischial tuberosity, which affects the sitting comfort, as much as possible.
The present invention relates to a seating comfort reducing seat having good sitting comfort, which can appropriately cope with variations in a sitting position assumed at the time of sitting and changes in a sitting posture.

[0002]

2. Description of the Related Art Conventionally, seats such as vehicle seats which use urethane foam as a cushioning material have been mainly used.

[0003] There have been many attempts to improve the sitting comfort of such seats. The inventor of the present invention has previously proposed a seat which locates a portion that greatly affects the feeling of sitting comfort of the seat and reduces the seat pressure at the portion to improve the sitting comfort (Japanese Patent Application No. 2000-10863).
No. 7).

However, when the seat is actually used, variations in the seating position and variations in the ischium position due to changes in the sitting posture are assumed, and it is not sufficient to reduce the seat pressure at a specific position. There is.

[0005] In this case, in the earlier proposal of the present inventor, it is possible to cope with the problem by making the holes and depressions (recesses) for reducing the seat pressure as wide as possible, but too wide. In such a case, depression of the buttocks and the like are likely to occur, which may degrade the sitting comfort.

As a measure for preventing such a fall of the buttocks, the present inventor has proposed measures such as providing a net or canvas on the upper surface of a hole or a depression, but it has been improved in terms of cost and workability. Is required.

The present invention has been made in view of the above circumstances, and has a good sitting comfort, a difference in sitting position, a change in posture,
An object of the present invention is to provide a seat pressure reduction seat that can respond to individual circumstances in actual seating, such as a difference in body shape, can meet the needs of customers more, and can suitably cope with cost reduction.

[0008]

Means for Solving the Problems In view of the above circumstances, the present inventor studied the sheet in consideration of the following points.

Differences in seating positions There are individual differences in sitting positions due to personal preferences, the influence of the angle of the backrest, and the like. However, lateral displacement is usually restricted by cushions and the bank on the side of the backrest, as in the case of vehicle seats (especially single seats), so seating usually takes place in the center of the seat. Therefore, there is almost no lateral displacement. Therefore, it is considered that most of the displacement due to individual differences in the seating position occurs in the front-rear direction.

Change in sitting posture If the same person continues to sit on the seat, the sitting posture changes due to fatigue or the like, thereby changing the position of the ischium. Since the change in the position is restricted by the bank on the side of the cushion and the backrest, the change in the seat pressure peak hardly occurs in the lateral direction, and most of the change occurs in the front-back direction.

Differences in body shape Regarding the displacement of the ischial position due to the difference in the body shape of each individual, variations occur in the lateral direction due to the difference in the spacing of the ischial bones of each person. However, even if the variation occurs,
It can be said that the absolute amount is considerably smaller than the variation factor of the above.

The present inventor has examined the above-mentioned points, and found that a seat provided with a cushion material having a seating portion on the upper surface and a cushion support formed of an inelastic member on which the cushion material is directly placed. In the above, the cushion support has holes, and when a subject or a 3D mannequin according to JIS-D4607 is seated on a seating portion of the cushion material, an area corresponding to a position immediately below a seat pressure peak generation point of the cushion material is specified. However, when a partial area before and after the specific area is set as a reference, the lower surface of the cushioning material located in the partial area before and after the specific area is arranged so as to be able to enter the hole of the cushion support. By obtaining a seat pressure-reducing seat that not only provides excellent sitting comfort based on the knowledge obtained above, but also actual differences such as differences in seating positions, changes in posture, differences in body shape, etc. Can respond easily and reliably to the individual circumstances in seated was found that can be a seat pressure reducing sheet attained reduction of cost.

That is, when an actual seat is taken into consideration, it is assumed that the peak position of the seat pressure is shifted to the front, rear, left and right depending on the variation of the seating position and the seating posture. In a seat where each seat is scheduled to be seated, the influence of the longitudinal displacement is much larger than the lateral displacement, and the improvement corresponding to this longitudinal displacement can dramatically improve the sitting comfort. The inventors have found that the present invention can be performed, and have accomplished the present invention.

Accordingly, an object of the present invention is to provide the following seat pressure reducing sheet. [Claim 1] In a seat comprising a cushion material having a seating portion on an upper surface and a cushion support formed of an inelastic member on which the cushion material is directly placed, the cushion support has holes. In addition to the above, a test subject or 3 according to JIS-D4607
When the D mannequin is seated, an area corresponding to the position immediately below the peak of the seating pressure of the cushioning material is specified, and when a partial area before and after the specific area is set, the area is located in the partial area before and after the specific area. A seat pressure reducing sheet, wherein a lower surface of a cushion material to be inserted is disposed so as to be able to enter a hole of the cushion support. [Claim 2] the area of the front and rear partial area relative to the specific region is 5～1000Cm ² claim 1 seat pressure reducing sheet according.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail. A seat pressure reducing sheet according to the present invention comprises a cushion member having a seating portion on an upper surface, and a cushion support on which the cushion member is directly placed. The cushion material may be a known pad material, for example, polyurethane foam, chip urethane,
Chemical fibers, vellus, plant fibers and the like can be mentioned.

As the cushion support of the present invention, a cushion support formed of a known inelastic member can be used. Specifically, a pan frame for automobiles, a frame for bench seats and the like can be used. Although it can be mentioned, the material, shape, use, and the like are not particularly limited.

In the seat pressure reducing sheet according to the present invention, the predetermined position of the cushion material is provided so as to be able to enter a hole formed in the cushion support, so that the cushion material at the predetermined position is not excessively crushed. The seat pressure in the specified partial region can be reduced.

Here, the partial area of the present invention is specified by placing the subject or JIS-D4607 on the seat of the cushion material.
When the 3D mannequin is seated, a region corresponding to a position immediately below the peak of the seat pressure of the cushion material is specified, and the specified region is used as a reference. It can be said that this is a place where the feeling of sitting is dramatically improved.

The location of the peak of the seat pressure peak is determined, for example, by first placing a cushion material on a cushion support so as to use it for actual sitting, and then placing the subject or a 3D mannequin (JIS-D4607) at a predetermined position. (Commonly known as hip points), and the seating is performed with reference to a seat pressure peak generation position applied by a seated subject or a mannequin. The seat pressure can be measured by a known measuring device.

According to the present invention, in order to improve the sitting comfort according to the actual seating, the above-mentioned seat pressure peak occurrence location is set as a reference, and partial regions before and after the seat pressure peak occurrence location are set as a reference. The seat is designed by the following.

In the present invention, the setting of the partial area is performed with respect to the positioning of the seat in the front-rear direction, with respect to the seat pressure peak occurrence location (the center of the occurrence location) as a reference toward the rear (usually the backrest side). It is recommended to set a range of 10 cm to 10 cm and a range of 5 cm to 20 cm forward (usually a position pressed by the thigh). On the other hand, regarding the positioning of the seat in the lateral direction, the seat pressure peak occurrence point (the center of the occurrence point)
May be determined so as to be left-right symmetrical with respect to the center. The length can be adjusted in consideration of the length in the front-rear direction and the total area and shape described later. As described above, the partial region of the present invention can be easily set because the seat pressure peak occurrence position when the seat is seated or placed by the above method is used as a reference.

At the time of the above setting, there are two places where the measured seat pressure peaks occur. Therefore, the setting of the partial area based on the two places can be set to one or two areas. Butt or hammock-like (most of the cushion material pressed by sitting enters the hole,
In order to prevent the bottom of the buttocks which is pressed by the central part of the buttocks which is not the peak of the sitting pressure from dropping down) and to improve the durability of the cushion support, the seat pressure is particularly increased at two places. It is recommended to define the partial area so as to individually cover the peak occurrence location.

The total area of the partial regions is usually 5 to 100
Preferably 0 cm ^2, in particular 100～500Cm ^2, too small may improvement of comfort is not expected sufficiently, there is a case where excessive drop occurs during sitting too large.

In the seat pressure reducing sheet of the present invention, the lower surface of the cushion material corresponding to the partial region is used as a cushion support in order to reduce the sitting pressure in the specified partial region and improve the sitting comfort. A hole is provided at a predetermined position of the cushion support in order to dispose the hole so as to be able to enter the hole, which does not require a particularly complicated operation process.

Here, the hole of the cushion support of the present invention can be formed into a graphic area according to the shape of the partial area by the above-described determination method. As shown, elliptical (FIG. 1), rounded rectangle (substantially rectangular (FIG. 2)), rectangle (FIG. 3), octagon (FIG. 4), trapezoid (FIG. 5), FIG. Holes 2 of trapezoidal shape (FIG. 6) and rhombus shape (FIG. 7) in the opposite direction can be provided, and the shape of these holes 2 is adapted to the shape of a specific partial region of the cushion material to be placed. In addition, the shape of the hole of the support of the present invention is not limited to the illustrated examples, and can be appropriately changed according to the shape set as the partial region.

Next, regarding the seat pressure reducing sheet of the present invention,
This will be described with reference to FIGS. FIG. 8 shows a pan frame (for a vehicle front seat) which is an example of the cushion support 1.

The cushion support 1 shown in FIG.
Are provided at two predetermined positions. This hole 2
Place a cushion material to be placed on the cushion support 1,
The position where the seat pressure peak occurs is specified by sitting the subject or placing the 3D manikin according to JIS-D4607, and the partial area before and after the specific location is defined as an elliptical area, and the cushion material corresponding to the elliptical area is determined. The sub-area defined on the lower surface of the subject sits on the subject or JIS-D4
When the 3D mannequin according to 607 is placed, the hole 2
It is perforated at the position where it enters.

FIG. 9 is a sectional view of the seat pressure reducing sheet 3 provided with the cushion support 1 of FIG. FIG.
The seat pressure reducing sheet 3 is obtained by placing the cushion material 4 on the cushion support 1, and the lower surface corresponding to the set partial area can enter the hole of the cushion support 1 shown in FIG. It is arranged as follows.

FIGS. 9A and 9B show holes 2
10A and 10B are cross-sectional views in which a sheet is divided so as to pass through, and FIG. 9A illustrates a sheet obtained by dividing the sheet from the left-right direction, and FIG. 9B illustrates a sheet obtained by dividing the sheet from the front-rear direction.

In the seat pressure reducing sheet 3 of the present embodiment, when the seat pressure is applied in the direction of the outline arrow by seating, the lower surface of the cushion material 3 corresponding to the partial area of the present invention is provided on the cushion support 1. Since it enters the hole 2, the partial area is prevented from being excessively crushed, and the density of the partial area is avoided, so that the sitting comfort is basically good.

In this case, in particular, the seat pressure reducing sheet 3 of the present invention
In the case of (1), when the seating position is supposed to vary due to the actual seating and the position shift occurs due to the change of the seating posture, the movement in the direction of the horizontal arrow is expected as shown in (b). However, since holes are provided at positions corresponding to the partial areas of the present invention, the partial areas provided before and after the seat pressure peak occurrence location are covered even if the position of the seat pressure peak occurrence location is shifted as described above. In addition, even in the case of displacement, it is possible to cover most of the places where the seat pressure peaks occur where the position is changed due to the displacement, so that the cushion material is prevented from being suddenly excessively crushed due to the displacement and the sitting comfort is deteriorated. It is possible to avoid a problem, and to provide an excellent sitting feeling that can widely correspond to an actual use state.

As described above, according to the seat pressure reducing sheet of the present invention, the cushioning material in a specific area based on the area immediately below the seat pressure peak generating point of the present invention enters the hole, Since the specific region of the cushioning material is not excessively crushed to increase the density, it is possible to provide an excellent sitting comfort basically without a bottom contact as described above. Also, even when individual differences are assumed in actual seating such as differences in seating position, changes in posture, differences in body shape, etc., holes are provided in specific partial regions before and after based on the knowledge of the present inventor. So
It is possible to cover most of the position corresponding to the seat pressure peak occurrence position of the person who actually sits, and it is possible to provide an excellent sitting comfort without a bottom contact feeling corresponding to individual circumstances.

It should be noted that the present invention is not limited to the above-described embodiment, and may be appropriately changed without departing from the gist of the present invention. For example, the present invention does not use a net or canvas on the upper surface of a hole or a depression, does not cause a drop in buttocks, is advantageous in reducing costs, and has a variation in a sitting position and a variation in a sitting position due to a change in a sitting posture. However, as long as the object of the present invention is not impaired, it is acceptable to provide a net or canvas and use its elasticity.

The seat pressure reducing seat of the present invention can be suitably adopted as various seats. In particular, as in the case of a vehicle seat (especially a single seat), the seat pressure reducing seat is restricted by a bank on the side of the cushion and the backrest. It can be suitably adopted as a sheet having the above.

[0035]

The seat pressure reducing seat of the present invention can improve the static sitting comfort of the seat and reduce the pressure near the ischial tuberosity which affects the sitting comfort. It is possible to suitably cope with variations in the assumed sitting position and changes in the sitting posture.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an example of a cushion support of the present invention, in which an oval hole is formed.

FIG. 2 is a schematic view showing another example of the cushion support of the present invention, showing an example in which a substantially rectangular hole is formed.

FIG. 3 is a schematic view showing another example of the cushion support of the present invention, in which a rectangular hole is formed.

FIG. 4 is a schematic view showing another example of the cushion support of the present invention, in which an octagonal hole is formed.

FIG. 5 is a schematic view showing another example of the cushion support of the present invention, in which a trapezoidal hole is formed.

FIG. 6 is a schematic view showing another example of the cushion support of the present invention, in which a trapezoidal hole opposite to FIG. 5 is formed.

FIG. 7 is a schematic view showing another example of the cushion support of the present invention, showing an example in which diamond-shaped holes are formed.

FIG. 8 is a perspective view showing another example (pan frame) of the cushion support of the present invention.

9A and 9B are cross-sectional views of an example of the seat pressure reducing sheet according to the present invention, which are divided on the basis of holes, in which FIG. 9A is divided from the left and right directions of the sheet, and FIG. Are shown below.

[Description of Signs] 1 cushion support 2 hole 3 seat pressure reduction sheet 4 cushion material

Claims (2)

[Claims] 1. A cushioning material having a seating portion on an upper surface,
A sheet comprising a cushion support formed of an inelastic member on which the cushion material is directly placed;
When the cushion support has a hole and a subject or a 3D mannequin according to JIS-D4607 is seated on a seating portion of the cushion material, an area corresponding to a position immediately below a seat pressure peak generation point of the cushion material is specified, When a partial area before and after the specific area is set as a reference, the lower surface of the cushion material located in the partial area before and after is set so as to be able to enter the hole of the cushion support. Pressure reducing sheet. 2. The seat pressure reducing sheet according to claim 1, wherein the area of the partial region before and after the specific region is 5 to 1000 cm ² .