JP2001112567A - Cushon of seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the buttocks and the femurs from getting tired when a user has been sitting on a seat's cushion for many hours, prevent the ischial tuberosities and the femurs of the buttocks and the glutei maximi in the lower portions of the greater trochanters of the sitting person from suffering bloodstream inhibition due to pressure and improve a feeling of sitting and comfortability. SOLUTION: A pair of right and left notches 27 extending longitudinally in the lower portions of both sides of the main portion 23 of a cushion 21 is formed. The width direction length of the notches 27 is formed from below the greater trochanters 17 connecting the ischial tuberosities 13 of the buttocks 11 and the femurs 15 to the main portion 23. The notches 27 are formed, leaving 40 to 70% of the thickness of the main portion of the cushion 21. The longitudinal length of the notches 27 is 90 mm forward and 60 mm backward of the hip point of the sitting person as a center. A pad material 28 softer than the cushion 21 of the main portion 23 is inserted into the notches 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat cushion, and more particularly, to a seat cushion having a main portion which is attached to a seat frame and supports a hip and a thigh of a seated person.

[0002]

2. Description of the Related Art Conventionally, vehicle seats, railway seats,
Often seated on seats such as theater seats for a long time,
In addition, due to the maintenance of expressways, the opportunity to travel while sitting in a car for a long time is increasing. For this reason, vehicle seats,
Seats such as railway seats and theater seats are provided with a thick cushion body, and various improvements are made so as not to cause fatigue even when seated for a long time.

As shown in FIG. 6, a cushion body 1 of a seat cushion such as a vehicle seat is mounted on a seat frame 3, and the cushion body 1 includes a main part 5 for supporting a seated person's buttocks and thighs. And a side portion 7 integrally formed on both sides of the main portion 5. The main portion 5 and the side portions 7 of the cushion body 1 are integrally formed of a foamed synthetic resin such as urethane foam, and are covered with a skin material (not shown) to form a seat cushion.

[0004]

However, when sitting on a cushion body 1 such as a conventional vehicle seat for a long time, it is inevitable that the buttocks and thighs of the occupant become fatigued. Was. As shown in FIGS. 4 and 5, the pain and fatigue of the buttocks and thighs of the seated person are compressed at the ischial tuberosities 13 and the femur 15 and the lower part of the greater trochanter 17 of the buttocks 11 of the seated person H. The ischial tuberosity 13, the femur 15, and the greater trochanter 1
7 caused by obstruction of blood flow in the lower gluteal muscles or by exceeding allowable pressure.

[0006] A pressure in a seated state is applied to the cushion body 1 shown in FIG. 6 by a measuring device, and the area change and the compression ratio of the cushion body 1 at this time are measured. As shown in FIG. The compression ratio of the main portion 5 at a position corresponding to a portion where the area change is large, that is, a position corresponding to a position below the greater trochanter 17 connecting the ischial tubercle 13 and the femur 15 of the hip portion 11 of the seated person H is 50%. It has been found that the portion 5a described above exists. FIG. 8 shows that the compression ratio of the main unit 5 is 50.
The portion 5a that is equal to or more than 5% is shown in black.

As shown in FIG. 8, the compression ratio of the main section 5 is 5
Close to the portion 5a of 0% or more, and the portion 5b of 45% or more
Exists, and there is a portion 5c of 40% or more, and these portions 5a, 5b, and 5c are dense. This is because the main body 5 of the cushion 1 is continuous in the horizontal direction and the cells of the foam are continuous, so that the load in the vertical direction of the cushion 1 is transmitted in the horizontal direction of the main part 5.

SUMMARY OF THE INVENTION An object of the present invention is to prevent a seated person's buttocks and thighs from being fatigued when seated on a cushion of a vehicle seat, railway seat, theater seat or the like for a long time. To reduce the change in the area of the ischium tuber at the buttocks of the seated person and the area of the femur and the cushion body below the greater trochanter, reduce the compressibility, and reduce the ischial tuberosity and thigh bones and the greater atlas of the buttocks of the seated person. It can prevent the lower gluteal muscles of the child from being compressed and cause blood flow obstruction, and can prevent the buttocks and thighs from becoming painful and numb due to prolonged sitting. It is intended to provide a seat cushion body which can improve sitting comfort and comfort and is excellent in economy.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and a seat cushion according to claim 1 of the present invention is attached to a seat frame, and has a butt portion of a seated person and In a seat cushion body having a main portion for supporting a thigh, a pair of left and right cutouts extending in the front-rear direction are formed at lower portions on both sides of the main portion of the cushion body, and the position of the cutout in the width direction is seated. Formed below the greater trochanter connecting the ischial tubercle and the femur at the buttocks of the elderly,
A pad material softer than the cushion body of the main portion is inserted into the cutout portion.

A seat cushion body according to a second aspect of the present invention is a seat cushion body attached to a seat frame and having a main portion for supporting a seated person's buttocks and thighs. A pair of left and right cutouts extending in the front-rear direction are formed at the lower part of both sides of the main part of the body, and the cutouts have a thickness of 40% of the thickness of the main part of the cushion body.
The notch is formed to have a thickness of about 70%, and the width of the notch is in the width direction from the lower part of the greater trochanter connecting the ischial tubercle and the femur at the buttocks of the seated person to both ends of the main part. And a pad material softer than the cushion body of the main portion is inserted into the cutout portion.

A seat cushion body according to a third aspect of the present invention is a seat cushion body attached to a seat frame and having a main portion for supporting a seated person's hips and thighs. A pair of left and right cutouts extending in the front-rear direction is formed at the lower part of both sides of the main part of the body, and the length of the cutout in the width direction is greater than that of the greater trochanter connecting the ischial tuberosities of the buttocks of the seated person and the femur. Each of the cutouts is formed from below toward both side ends of the main portion, and the length of the cutout in the front-rear direction is set to be 60 forwards around the hip point of the seated person.
The main body is formed with a pad material that is softer than the cushion body of the main part.

A seat cushion body according to a fourth aspect of the present invention is the seat cushion body attached to a seat frame and having a main portion for supporting a seated person's hips and thighs. A pair of left and right cutouts extending in the front-rear direction are formed at the lower part of both sides of the main part of the body, and the cutouts have a thickness of 40% of the thickness of the main part of the cushion body.
The notch is formed to have a thickness of about 70%, and the width of the notch is in the width direction from the lower part of the greater trochanter connecting the ischial tubercle and the femur at the buttocks of the seated person to both ends of the main part. The notch is formed, and the length in the front-rear direction of the notch is 60 to 120 mm forward, preferably 90 mm, preferably about the hip point of the seated person,
It is formed to have a length of 30 to 90 mm, preferably 60 mm at the rear, and a pad material softer than the cushion body of the main portion is inserted into the cutout portion.

According to the seat cushion of the first aspect of the present invention, a pair of left and right cutouts extending in the front-rear direction are formed at the lower portions of both sides of the main portion of the cushion, and the width of the cutout in the width direction is provided. The position is formed below the greater trochanter connecting the ischial tuberosity and the femur at the buttocks of the seated person, and a pad material softer than the cushion body of the main portion is inserted into the notch. If you sit on your body for a long time,
To avoid fatigue of the seated person's buttocks and thighs, and to prevent pressure on the ischial tuberosities of the seated people's buttocks and the lower part of the femur and greater trochanter, causing blood flow obstruction The soft pad material can eliminate the feeling of void in the notch, and it is possible to prevent the buttocks and thighs from being hurt or numb due to prolonged sitting, and to provide comfort and comfort. Comfort can be improved.

According to the cushion body of the seat according to the second aspect of the present invention, a pair of left and right notches extending in the front-rear direction are formed at the lower portions of both sides of the main portion of the cushion body. The notch is formed to have a thickness of 40 to 70% of the thickness of the main part, and the length of the notch in the width direction is from the lower part of the greater trochanter connecting the ischial tubercle and the femur at the buttocks of the seated person. Since the pad material is formed toward both side end portions, and a pad material softer than the cushion body of the main portion is inserted into the notch portion, when sitting on the cushion body for a long time, the buttocks and the large size of the seated person can be obtained. The thigh can be avoided from being fatigued, and the sciatic tuberosity at the buttocks of the seated person and the gluteus maximus below the greater trochanter can be compressed, which can prevent blood flow obstruction, The soft pad material can eliminate the gap feeling in the notch, May become sore buttocks and thighs by seating between, it is possible to prevent the or numbness, it is possible to improve the seating comfort and comfort.

According to the cushion member of the seat according to the third aspect of the present invention, a pair of left and right notches extending in the front-rear direction are formed at lower portions on both sides of the main portion of the cushion member, and the notch portions in the width direction are formed. The length is formed from the lower part of the greater trochanter connecting the ischial tuberosity and the femur at the buttocks of the seated person to both ends of the main part, and the length of the notch in the front-rear direction is the hips of the seated person. 60-120m forward around the point
m, formed to be 30 to 90 mm rearward, and a pad material softer than the cushion body of the main part is inserted into the notch, so that when sitting on the cushion body for a long time, the buttocks of the seated person and Avoids fatigue of the thighs and prevents compression of the ischial tuberosities at the buttocks of the seated person and the gluteus maximus below the greater trochanter, thereby preventing blood flow obstruction. The soft pad material can eliminate the feeling of void in the notch, and it is possible to prevent the buttocks and thighs from becoming painful or numb due to prolonged sitting,
Sitting comfort and comfort can be improved.

According to the cushion member of the seat according to the fourth aspect of the present invention, a pair of left and right notches extending in the front-rear direction are formed at the lower portions on both sides of the main portion of the cushion member. The notch is formed to have a thickness of 40 to 70% of the thickness of the main part, and the length of the notch in the width direction is from the lower part of the greater trochanter connecting the ischial tubercle and the femur at the buttocks of the seated person. Each notch is formed toward both side ends, and the length of the notch in the front-rear direction is 60 to 120 mm, preferably 90 mm, and 30 rearward with respect to the seated person's hip point.
It is formed to 90 mm, preferably 60 mm, and a pad material softer than the cushion body of the main part is inserted into the cutout part. The thigh can be avoided from being fatigued, and the sciatic tuberosity at the buttocks of the seated person and the gluteus maximus below the greater trochanter can be compressed, which can prevent blood flow obstruction, The soft pad material can eliminate the feeling of voids in the notch, and it can prevent the buttocks and thighs from being hurt or numb due to prolonged sitting, thereby improving sitting comfort and comfort. Can be improved.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A seat cushion according to the present invention will be described below in detail with reference to the drawings. FIG. 1 (a),
(B), (c) and FIG. 2 each show an embodiment of a seat cushion body according to the present invention. In this embodiment, a case where the present invention is applied to a vehicle seat cushion body 21 will be described. Although described, the present invention is not limited to this, and can be applied to a cushion body of a seat such as a railway seat and a theater seat. The description of the ischial tuberosity 13, the femur 15, and the greater trochanter 17 of the buttocks 11 of the seated person H shown in FIGS. 4 and 5 will be incorporated in this embodiment.

The cushion 21 of the seat is placed on a seat frame 22 and is covered with a skin material (not shown). The seat frame 22 may be a pan frame, a frame using a spring, or another frame. it can. The cushion body 21 includes a main portion 23 that supports the buttocks 11 and the thighs of the seated person H, and the main portion 23.
And a side portion 25 integrally formed on both sides.

Although the side portion 25 is curved upward in the illustrated embodiment, the main portion 23 and the side portion 25 are curved.
Means one cushion body 21, one having no border naturally has the main part 23 and the side part 25, and any shape may be used as long as it is one cushion body 21. .

A pair of left and right cutouts 27 extending in the front-rear direction are formed at lower portions on both sides of the main portion 23 of the cushion body 21. The position of the notch 27 in the width direction is formed below the greater trochanter 17 connecting the ischial tubercle 13 and the femur 15 of the buttocks 11 of the seated person H. The positions of the ischial tuberosity 13 and the greater trochanter 17 are slightly different depending on the difference in the physique of the seated person H.
The position of 7 is almost the same.

By forming a notch 27 extending in the front-rear direction at the lower part of both sides of the main part 23 of the cushion body 21, the main part 23 of the cushion body 21 is continuous in the horizontal direction, and the cells of the foam are horizontal. Divide the continuation in the direction,
Due to the vertical load of the occupant H applied to the cushion body 21, the conventional portion having a large change in area and a large change in compressibility shown in FIG. 8 can be moved to a different position.
Further, a pad material 28 which is softer than the main portion 23 of the cushion body 21 is inserted into the cutout portion 27. This soft pad material 28 can prevent a feeling of void in the notch 27 when seated.

The distance L1 between the left and right cutouts 27 is set to 220 mm to 280 mm, preferably 250 mm, as shown in FIG.
Corresponds to a distance of 250 mm between the left and right greater trochanters 17 of the human body. If the distance L1 between the left and right cutouts 27 is 220 mm or less, the supporting force is reduced, and there is a risk of swinging. If the distance L1 between the left and right cutouts 27 is 280 mm or more, the greater trochanter 17 pressure is applied. Is higher, the ischial tubercle 1 of the buttocks 11 of the seated person H
3 and the lower gluteal muscles of the thigh bone 15 and the greater trochanter 17 cannot be prevented from causing blood flow obstruction, and the buttocks 11 and the thighs of the seated person H become fatigued. I can't avoid it.

As shown in FIG. 1B, the length L2 of the notch 27 in the width direction is the ischial tubercle 1 of the buttocks 11 of the seated person H.
In the present embodiment, each side is formed from the lower part of the greater trochanter 17 connecting the femur 3 and the femur 15 to both side ends of the main portion 23, but is formed up to both side ends of the main portion 23. It does not have to be extended. As shown in FIG. 1A, the length L3, L4 of the notch 27 in the front-rear direction is 60 to 120 m forward with respect to the hip point HP of the occupant H.
m, preferably 90 mm and 30 to 90 mm behind, preferably 60 mm.

If the length L3 forward from the hip point HP is not more than 60 mm in a state where the soft pad material 28 is inserted into the cutout portion 27, the buttocks 11 of the occupant H may be displaced. If the length L3 in the forward direction is 120 mm or more, the support of the thigh of the seated person H is weakened. Also, if the length L4 from the hip point HP to the rear is less than 30 mm, the pressure on the gluteus maximus of the seated person H remains, and the effect of sitting is reduced, and the length L4 to the rear is 90 mm or more. When the cushion body 21 is trim-assembled, wrinkles and the like occur, making it difficult to maintain the shape.

As shown in FIG. 1B, the thickness L6 of the notch 27 is equal to the thickness L5 of the main portion 23 of the cushion body 21.
On the other hand, a thickness of 40 to 70% of the thickness L5 of the main portion 23 is formed, and a soft pad material 28 is inserted into the cutout portion 27. The soft pad material 28 is formed of a material having a low density such as a urethane foam of the main portion 23 of the cushion body 21. The soft pad material 28 may be inserted after the cushion body 21 is formed, or the soft pad material 28 may be insert-molded during foam molding.

From the state shown in FIG. 2 where the cushion body 21 is not seated, pressure is applied to the cushion body 21 in a seated state by a measuring device, and the area change and compression ratio of the cushion body 21 at this time are measured. As shown in FIG. 3, there was a change in area and a change in compressibility. The portion where the area change is large is concentrated at the center of the buttocks 11 of the seated person H. FIG. 3 shows a portion 2 where the compression ratio of the main portion 23 is 50% or more.
3a is shown in black.

Further, as shown in FIG. 3, the compression ratio of the main portion 23 is close to the portion 23a where the compression ratio is 50% or more, and the compression ratio is 4%.
5% or more of the portion 23b occurs near the center of the main portion 23. The portion 23c having a compression ratio of 40% or more is a portion 23b near the center of the main portion 23 and having a compression ratio of 45% or more.
Occur in close proximity to On the other hand, the compression ratio of the main portion 23 at a position corresponding to the position below the greater trochanter 17 connecting the ischial tuberosity 13 of the buttocks 11 of the seated person H and the femur 15 is 40% or less. This is due to the presence of the notch 27, and the pressure below the greater trochanter 17 is reduced.

[0027]

The above is an embodiment of the cushion member of the seat according to the present invention. According to the cushion member of the seat according to the first aspect of the present invention, the lower portion of both sides of the main portion of the cushion member. A pair of left and right cutouts extending in the front-rear direction are formed, and the positions of the cutouts in the width direction are respectively formed below the greater trochanter connecting the ischial tubercle and the femur of the buttocks of the seated person. Since the pad material which is softer than the cushion body of the main part is inserted, it is possible to prevent the buttocks and thighs of the occupant from being fatigued when sitting on the cushion body for a long time. The sciatic tuberosity of the hip, the thigh bone, and the gluteus maximus below the greater trochanter can be compressed to prevent blood flow obstruction, and the soft pad material eliminates the gap in the notch The sores and thighs do not hurt after prolonged sitting. Or, it is possible to prevent the or numbness, it is possible to improve the seating comfort and comfort.

According to the cushion body of the seat according to the second aspect of the present invention, a pair of left and right notches extending in the front-rear direction are formed at the lower portions on both sides of the main portion of the cushion body. The notch is formed to have a thickness of 40 to 70% of the thickness of the main part, and the length of the notch in the width direction is from the lower part of the greater trochanter connecting the ischial tubercle and the femur at the buttocks of the seated person. Since the pad material is formed toward both side end portions, and a pad material softer than the cushion body of the main portion is inserted into the notch portion, when sitting on the cushion body for a long time, the buttocks and the large size of the seated person can be obtained. The thigh can be avoided from being fatigued, and the sciatic tuberosity at the buttocks of the seated person and the gluteus maximus below the greater trochanter can be compressed, which can prevent blood flow obstruction, The soft pad material can eliminate the gap feeling in the notch, May become sore buttocks and thighs by seating between, it is possible to prevent the or numbness, it is possible to improve the seating comfort and comfort.

According to the cushion body of the seat according to the third aspect of the present invention, a pair of left and right notches extending in the front-rear direction are formed at the lower portions on both sides of the main portion of the cushion body, and the notches extend in the width direction. The length is formed from the lower part of the greater trochanter connecting the ischial tuberosity and the femur at the buttocks of the seated person to both ends of the main part, and the length of the notch in the front-rear direction is the hips of the seated person. 60-120m forward around the point
m, formed to be 30 to 90 mm rearward, and a pad material softer than the cushion body of the main part is inserted into the notch, so that when sitting on the cushion body for a long time, the buttocks of the seated person and Avoids fatigue of the thighs and prevents compression of the ischial tuberosities at the buttocks of the seated person and the gluteus maximus below the greater trochanter, thereby preventing blood flow obstruction. The soft pad material can eliminate the feeling of void in the notch, and it is possible to prevent the buttocks and thighs from becoming painful or numb due to prolonged sitting,
Sitting comfort and comfort can be improved.

According to the seat cushion of the fourth aspect of the present invention, a pair of left and right cutouts extending in the front-rear direction are formed at lower portions on both sides of the main portion of the cushion, and the cutouts are formed of the cushion. The notch is formed to have a thickness of 40 to 70% of the thickness of the main part, and the length of the notch in the width direction is from the lower part of the greater trochanter connecting the ischial tubercle and the femur at the buttocks of the seated person. Each notch is formed toward both side ends, and the length of the notch in the front-rear direction is 60 to 120 mm, preferably 90 mm, and 30 rearward with respect to the seated person's hip point.
It is formed to 90 mm, preferably 60 mm, and a pad material softer than the cushion body of the main part is inserted into the cutout part. The thigh can be avoided from being fatigued, and the sciatic tuberosity at the buttocks of the seated person and the gluteus maximus below the greater trochanter can be compressed, which can prevent blood flow obstruction, The soft pad material can eliminate the feeling of voids in the notch, and it can prevent the buttocks and thighs from being hurt or numb due to prolonged sitting, thereby improving sitting comfort and comfort. Can be improved.

According to the present invention, when sitting on a cushion of a seat such as a vehicle seat, a railway seat, a theater seat or the like for a long time, it is possible to prevent the seated person's buttocks and thighs from becoming fatigued. Can prevent the ischium tuber at the buttocks of the seated person, the thighbone, and the lower gluteal muscles of the greater trochanter from being compressed, causing blood flow obstruction. It can prevent a feeling of feeling, and can prevent the buttocks and thighs from being hurt or numb due to prolonged sitting, improving the sitting comfort and comfort, and improving economy. An excellent seat cushion can be obtained.

[Brief description of the drawings]

1A and 1B show a cutout portion of a cushion body of a seat according to the present invention, wherein FIG. 1A is a perspective view, FIG.
(C) is a rear view.

FIG. 2 is a cross-sectional view of a cushion body of a seat according to the present invention.

FIG. 3 is a cross-sectional view of the cushion according to the present invention, in which the area change and the compression ratio of the cushion in a seated state of the cushion are measured by a measuring device.

FIG. 4 is a side view of the buttocks and thighs of a seated person.

FIG. 5 is a partial front view schematically showing the ischial tuberosity and the greater trochanter at the buttocks of the seated person.

FIG. 6 is a sectional view of a cushion body of a conventional seat.

FIG. 7 is a cross-sectional view showing a change in area of a conventional seat cushion body in a seated state.

FIG. 8 is a cross-sectional view of a cushion body obtained by measuring a change in area and a compressibility of the cushion body in a seating state of the conventional cushion body with a measuring device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Butt part 13 Sciatic tuberosity 15 Femur 17 Great trochanter 21 Cushion body 22 Seat frame 23 Main part 25 Side part 27 Notch part 28 Cushion body

Claims (4)

[Claims] 1. A seat cushion attached to a seat frame and having a main portion for supporting the buttocks and thighs of a seated person, a notch extending in the front-rear direction below lower portions of both sides of the main portion of the cushion. A pair of left and right portions are formed, and the width direction position of the notch portion is formed below a greater trochanter connecting the ischial tubercle and the femur at the buttocks of the seated person, and the notch portion is a cushion body of the main portion. A cushion member for a seat, wherein a pad material softer than the pad material is inserted. 2. A seat cushion attached to a seat frame and having a main portion for supporting a seated person's buttocks and thighs. The left and right portions are formed as a pair, and the cutout portion has a thickness of 40 to
The notch is formed to have a thickness of 70%, and the width in the width direction of the notch is formed from below the greater trochanter connecting the ischial tuberculum and the femur at the buttocks of the seated person to both end portions of the main portion. A cushion member for a seat, wherein a pad material softer than the cushion member of the main portion is inserted into the cutout portion. 3. A notch extending in the front-rear direction at a lower portion of both sides of the main portion of the cushion body, wherein the notch is attached to a seat frame and has a main portion for supporting the buttocks and thighs of a seated person. A pair of left and right parts are formed, and the length in the width direction of the notch is formed from below the greater trochanter connecting the ischial tubercle and the femur of the buttocks of the seated person toward both side ends of the main part, The length of the notch in the front-rear direction is 60 to forward around the hip point of the seated person.
A seat cushion body formed to be 120 mm in length and 30 to 90 mm rearward, and a pad material softer than the cushion body of the main portion is inserted into the cutout portion. 4. A notch extending in the front-rear direction at a lower portion of both sides of a main portion of the cushion body, wherein the notch is attached to a seat frame and has a main portion supporting a hip portion and a thigh portion of a seated person. The left and right portions are formed as a pair, and the cutout portion has a thickness of 40 to
The notch is formed to have a thickness of 70%, and the width in the width direction of the notch is formed from below the greater trochanter connecting the ischial tuberculum and the femur at the buttocks of the seated person to both end portions of the main portion. The length of the notch in the front-rear direction is formed to be 60 to 120 mm, preferably 90 mm, and 30 to 90 mm, preferably 60 mm rearward, with the hip point of the occupant as the center. A cushion member for a seat, wherein a pad material softer than the cushion member is inserted.