JPH0755635B2 - Car seat - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vehicle seat, and more particularly to a vehicle seat that supports the upper half of the occupant's body and does not feel tired even when riding a long distance.

[Prior art]

As a conventional automobile seat, for example, Japanese Utility Model Laid-Open No. 51-112707
There is one as shown in Japanese Patent Publication.

This automobile seat has a flat seat back.

[Problems to be solved by the invention]

However, according to such a conventional example, since the upper body of the occupant is not always supported, it is easy to move to the left and right. Therefore, the occupant tries to suppress body sway to the left and right as much as possible, so that the arm exerts a force and grips the handle strongly. Therefore, there is a problem that the steering wheel cannot be operated smoothly and the operator is very tired.

Therefore, the present invention has been made in view of the above conventional problems, and an object of the present invention is to provide an automobile seat in which the occupant's upper body is prevented from exerting a force and fatigue is reduced.

[Means for solving problems]

In order to achieve such an object, the present invention provides at least a first support portion that supports the scapulae of the upper body of the occupant, a second support portion that supports the spine of the upper body, and a third support portion that supports the upper part of the latissimus dorsi muscle. A seat back having, and a seat cushion supporting the seat back, the first support portion is located at a position of a dimension of 300 mm upward along the torso line from the hip point,
Approximately 55 mm to the rear from the torso line, and to the left and right of the seat back seating center line
The first intersection point of 150 mm and the dimension 300 mm upward from the hip point along the torso line, and the dimension rearward and substantially perpendicular to the torso line is 58, 32, 37 mm and 153, 173, 17 to the left and right from the seating center line of the seat back
A straight line connecting the first intersection and the second intersection, a straight line connecting the third intersection and the fourth intersection, and a rear side of the seat back. A curve having a curvature of 140 mm including the first and third intersections centered on the center of a curve and a curve having a curvature of 180 mm including the second and fourth intersections also centering on the rear side of the seat back. The second support is located 350 mm above the hip point along the torso line and is located within the enclosed area,
Be located in an area surrounded by straight sides of 115 mm and 118 mm in a rearward direction at a right angle to the torso line and straight sides of 6 mm on the left and right sides of the seating center line. The third support portion is located at a position of 350 mm above the hip point along the torso line, and has a rearward dimension of about 61 mm at a right angle to the torso line.
Mm and the first intersection point at a position of 154 mm to the left and right of the seat back seating center line and the upper dimension along the torso line from the hip point.
At a position of 0 mm, the rearward dimension of the torso line is approximately 65, 44, 47 mm, and 158, 173, 17 to the left and right of the seat back center line, respectively.
A straight line connecting the first intersection and the second intersection, a straight line connecting the third intersection and the fourth intersection, and a rear side of the seat back. A curve having a curvature of 120 mm including the first and third intersections having a center point of, and a curve having a curvature of 200 mm including the second and fourth intersections having a rear side of the seat back as a center point. It is characterized in that it is located in an area surrounded by.

[Work]

Since the present invention has such a configuration, the first support portion and the second support portion support a portion corresponding to the external intercostal muscles of the upper body of the occupant and a portion in the vicinity thereof, and the third support portion supports the upper part of the latissimus dorsi muscle. Since it is pushed upward, the left and right movements of the upper body of the occupant are reliably prevented, the upper body does not receive any force, the steering wheel operation becomes light, and the feeling of fatigue is reduced.

〔Example〕

1 to 6 are views showing an embodiment of the present invention, in which a symbol S is a seat of the present invention for supporting the upper half of the occupant, and the seat S is a first support portion 1 and a second support portion. The seat back 6 has the second and third support portions 3, and the seat cushion 7 supporting the seat back 6.

Before going into the detailed description, the terms used in the present specification will be specified here.

"Seating center line of seat bag" means the back pan of JIS (Japanese Industrial Standard) D 4607-1977 three-dimensional sitting human body model (3DM-JM50) (hereinafter simply referred to as "human body model") for measuring vehicle interior dimensions. (A curved plate that has the shape of the back of the body)
Left and right center plane.

The "hip point" is the center of rotation between the torso and thigh of the "human model" and corresponds to the hip joint of the human body.

The "torso line" is a line (the axis of the body) that is displayed when the torso bar, which is a standard bar for measuring the tilt angle of the back pan, contacts the stopper of the back bracket, and is located behind the normal line of this line ( The tilt angle (direction A) is called the torso angle, which is 26 ° in the embodiment of the present invention.

The intersection is the intersection of the vertical dimension from the hip point HP and the horizontal dimension from the seating center line BC, and identifies the area supporting the upper body of the occupant by the first to fourth intersections. Specifying this area means that the upper half of the occupant can be held in the area even if the entire seat back does not have to be a so-called seat back.

As shown in FIG. 2, the first support portion 1 has a "seating center line" BC of the seat back 6 at a position where the upper dimension along the "torso line" TR from the "hip point" HP is 300 mm. Further, the first intersection 8a at a position of 150 mm to the left and right, at a position of 300 mm, and at a position of 55 mm to the rear of the torso line TR passing through the hip point HP at a position approximately 55 mm rearward, and also the seat back. 153,17 to the left and right of the seating center line BC of 6 respectively
Torso line at 3,176 mm position and also at 300 mm position and passing through the hip point HP
A straight line 8W having second to fourth intersections 8b, 8c, 8d with a position of a dimension of approximately 58,32,37 mm rearward from TR and connecting the first and second intersections 8a, 8b And a straight line 8X that similarly connects the third and fourth intersections 8c and 8d, and the seat back 6
A curve 8Y having a curvature R1 of 140 mm including the first and third intersections 8a, 8c with the rear side as the center, and the second and fourth intersections 8b with the rear side of the seat back 6 as the center. It is located within an area 1A (hatched display) surrounded by a curve 8Z having a curvature R2 of 180 mm including 8d.

In FIG. 1, reference numeral 14 is a pan frame made of FRP material that constitutes the back surface of the seat back 6 and the lower surface of the seat cushion 7, and a pipe-shaped frame 9 is supported in a loop on the front surface of the pan frame 14. Thin side frames 10 and 11 are arranged in front of the frame 9.

The seat back 6 includes the frame 9 and the side frames 10 and 11 made of a polyurethane foam pad material 1
It is configured to be wrapped with 2, and covered with an outer skin 13 such as cloth.

As the position of the frame 9, as shown in FIG. 2, the dimension from the hip point HP to the upper side along the torso line TR is at a position of 300 mm, and 191 mm to the left and right of the seating center line BC of the seat back 6, respectively. And also at a position of 300 mm and at a position approximately 55 mm rearward from the torso line TR passing through the hip point HP at a position of 55 mm as a center.

As shown in FIG. 3, the second support portion 2 has a dimension of 35 from the hip point HP to the upper side along the torso line TR.
At the position of 0 mm, the size of the torso line TR passing through the hip point HP at a position approximately 115 mm and 118 mm rearward and at a distance of 6 mm to the left and right of the seating center line BC is the first to the first position. Four
A straight line 19 connecting the intersections 19a, 19b and 19c, 19d (not shown), respectively.
It is located within the area 2A (hatched display) surrounded by W, 19X, 19Y (not shown) and 19Z.

In FIG. 2, reference numeral 6'shown by a broken line along the seat back 6 is another embodiment of the line on the front surface side of the seat back 6, and the shape shown by the solid line is for an automobile such as a race with a large lateral load. It is preferable to use it, and the shape indicated by the broken line is preferably used for a versatile automobile.

As shown in FIG. 3, the third support portion 3 has an upper dimension of 350 from the hip point HP to the torso line TR.
Seating center line BC of seat back 6 at mm position
Further, the first intersection 21a at a position of 154 mm to the left and right, at a position of 350 mm, and at a position approximately 61 mm rearward from the torso line TR passing through the hip point HP, and the seatback. Positions of 158,173,176 mm to the left and right of the seating center line BC of 6 and positions of 65,44,47 mm at the positions of 350 mm and at a position approximately right rearward from the torso line TR passing through the hip point HP. 2nd
It has a fourth intersection 21b, 21c, 21d, and the first and second intersections 2
A straight line 21W connecting between 1a and 21b and the same 3rd and 4th intersections 2
A straight line 21X connecting between 1c and 21d and first and third intersections 21a and 21c with the rear side of the seat back 6 as a center point are included.
A curve 21Y having a curvature R1 of millimeter, and a curve having a curvature R2 of 200 millimeter including the second and fourth intersections 21b and 21d, which are also centered on the rear side of the seat back 6.
It is located in area 3A (hatched display) surrounded by 21Z.

Specifically, the first and third support portions 1 and 3 are fixed to the bent portion 10a and the bent portion 10a which are the side frame 10 bulging toward the outer skin 13 side, as shown in FIGS. 4 and 5. Installed bracket 10b
And the pad material 12 arranged on the front side of the bent portion 10a and the bracket 10b. That is, the load required to bend the original thickness of the pad material 12 (for example, 20 mm) by 25% (5 mm for 20 mm) is set to 25 kg. And, the portion of the pad material 12 other than the first and third support portions 1 and 3 may be such that the load is 16 to 18 kg (for example, in terms of plate thickness, density, etc.). Second support 2
As shown in FIG. 6, by expanding the pan frame 14 toward the skin 13 side, the space between the skin 13 and the bulging portion 14a of the pan frame 14 is narrowed, and the original thickness of the pad material 12 is reduced. As mentioned above, for example, 20 mm, and the load is 25
It is specified by setting it to be kilograms.

Although it has been described that the first and third support portions 1 and 3 include the bent portion 10a and the bracket 10b formed on the side frame 10 and the pad material 12, the present invention is not limited to this. For example, the bulging portion may be formed on the pan frame 14. Alternatively, a spring may be stretched between the frames 9, a bent portion may be formed in the spring, and the bracket may be fixed. Further, a sub-bracket may be installed between the side frames 10 and 11, a bent portion may be formed in the sub-bracket, and the bracket may be fixed.

Also, the figure discloses a sheet S covered with a uniform skin 13,
A member having a higher hardness than other portions may be used only for the first to third support portions 1 to 3.

Therefore, according to this embodiment, most of the occupant (98% of Japanese according to the measurement results) corresponds to the external intercostal muscles of the occupant and the vicinity thereof is supported by the first support portion and the second support portion. At the same time, the upper part of the latissimus dorsi is pushed upward by the third support part, which results in hip point HP.
The left and right movements of the upper body of the occupant centering on the vehicle are reliably prevented, and smooth steering operation can be performed without exerting any force on the upper body, and the degree of fatigue is greatly reduced.

[Effect]

As described above, according to the present invention, the first support portion that supports the scapulae around the upper body of the occupant, the second support portion that supports the spine around the upper body, and the third support that supports around the upper latissimus dorsi muscle. A seat back having at least a portion, and a seat cushion supporting the seat back, wherein the first support portion is located at a position of 300 mm upward along the torso line from the hip point,
Approximately 55 mm to the rear from the torso line, and to the left and right of the seat back seating center line
The first intersection point of 150 mm and the dimension 300 mm upward from the hip point along the torso line, and the dimension rearward and substantially perpendicular to the torso line is 58, 32, 37 mm and 153, 173, 17 to the left and right from the seating center line of the seat back
A straight line connecting the first intersection and the second intersection, a straight line connecting the third intersection and the fourth intersection, and a rear side of the seat back. A curve having a curvature of 140 mm including the first and third intersections with the center point as a center point, and a curve having a curvature of 180 millimeters including the second and fourth intersection points having the rear side of the seat back as the center point. The second support portion is located 350 mm upward from the hip point along the torso line, and is located in an area surrounded by
Be located in an area surrounded by straight sides of 115 mm and 118 mm in a rearward direction at a right angle to the torso line and straight sides of 6 mm on the left and right sides of the seating center line. The third support portion is located at a position of 350 mm above the hip point along the torso line, and has a rearward dimension of about 61 mm at a right angle to the torso line.
Mm and the first intersection point at a position of 154 mm to the left and right of the seat back center line, and the dimension from the hip point to the upper side along the torso line 35
At a position of 0 mm, the rearward dimension of the torso line is approximately 65, 44, 47 mm and is 158, 17 to the left and right of the seating center line of the seat back, respectively.
A third straight line connecting the first crossing point and the second crossing point, a straight line connecting the third crossing point and the fourth crossing point, and 120 including the first and third intersections with the rear side as the center point
Includes a curve having a curvature of millimeter, and second and fourth intersections whose center point is also on the rear side of the seat back.
Since it is located in the area surrounded by a curve with a curvature of 200 mm, by supporting the upper body of the occupant, the left and right movements are reliably prevented, and the force on the upper body is exerted. It is possible not to enter and to operate the steering wheel smoothly, resulting in less fatigue.

[Brief description of drawings]

1 to 6 are views showing an embodiment of the present invention. FIG. 1 is a longitudinal sectional view, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is FIG. III-III line sectional view of FIG. 4, FIG. 4 is a vertical sectional view of the first and third support portions, FIG. 5 is a perspective view thereof, and FIG. 6 is a vertical sectional view of the second support portion. S: Automotive seat, 1st support portion, 2nd second
Support part, 3 ... Third support part, 6 ... Seat back, 7 ...
… Seat cushions, 8a, 19a, 21a …… 1st intersection, 8b, 19
b, 21b …… 2nd intersection, 8c, 19c, 21c …… 3rd intersection, 8d, 19d,
21d …… 4th intersection, 1A, 2A, 3A …… area, HP …… hip point, TR …… torso line, BC …… seating center line.

Claims (1)

[Claims] 1. A first support for supporting the upper part of the occupant's upper body around the shoulder blades
A seat back having at least a support part, a second support part supporting the spine of the upper body and a third support part supporting the upper part of the latissimus dorsi muscle, and a seat cushion supporting the seat back, the first support The part is located 300 mm above the hip point along the torso line,
Approximately 55 mm to the rear from the torso line, and to the left and right of the seat back seating center line
The first intersection point of 150 mm and the dimension 300 mm upward from the hip point along the torso line, and the dimension rearward and substantially perpendicular to the torso line is 58, 32, 37 mm and 153, 173, 17 to the left and right from the seating center line of the seat back
A straight line connecting the first intersection and the second intersection, a straight line connecting the third intersection and the fourth intersection, and a rear side of the seat back. A curve having a curvature of 140 mm including the first and third intersections with the center point as a center point, and a curve having a curvature of 180 millimeters including the second and fourth intersection points having the rear side of the seat back as the center point. The second support portion is located 350 mm upward from the hip point along the torso line, and is located in an area surrounded by
Be located in an area surrounded by straight sides having a length of 115 mm and 118 mm in the rear at a right angle to the torso line and straight sides having a length of 6 mm to the left and right of the seating center line. The third support portion is located at a position of 350 mm upward from the hip point along the torso line,
Approximately 61 mm rearward from the torso line, and to the left and right of the seat back centerline
The first intersection point at a position of 154 mm and the dimension 350 mm upward from the hip point along the torso line, and the dimension rearward at a right angle from the torso line is 65, 44, 47 mm and 158, 173, 17 to the left and right of the seat center line of the seat back, respectively.
A straight line connecting the first intersection and the second intersection, a straight line connecting the third intersection and the fourth intersection, and a rear side of the seat back. A curve having a curvature of 120 millimeters including the first and third intersections having the center point as a center point, and a curve having a curvature of 200 millimeters including the second and the fourth intersection points having a center point on the rear side of the seat back. An automobile seat characterized by being located in an area surrounded by.