Seat cushion and vehicle seat

Patent metadata

Field	Value
Publication number	US-9308846-B2
Application number	US-201214007684-A
Country	US
Kind code	B2
Filing date	Mar 29, 2012
Priority date	Mar 31, 2011
Publication date	Apr 12, 2016
Grant date	Apr 12, 2016

Abstract

A seat cushion includes a seat base frame, a cushion pad disposed on the seat base frame, and a skin material that covers the seat base frame and the cushion pad. The seat base frame includes a pair of side frames that extends in the front to back direction, a front elastic member that is installed in the pair of side frames and is in contact with the cushion pad, and a rear elastic member that is disposed while being separated from the front elastic member by a predetermined distance and is in contact with the cushion pad, in which a pad contact surface of the front elastic member is disposed to be inclined rearward with respect to a horizontal plane and a pad contact surface of the rear elastic member is disposed to be inclined forward with respect to the horizontal plane or to be parallel thereto.

First claim

The invention claimed is:

1. A seat cushion comprising:
a seat base frame;
a cushion pad which is placed on the seat base frame; and
a skin material which covers the seat base frame and the cushion pad, wherein:
the seat base frame comprises:
a pair of side frames that extends in a front to back direction;
a front elastic member that is installed in the pair of side frames and is in contact with the cushion pad;
a rear elastic member that is separated from the front elastic member by a predetermined distance and is in contact with the cushion pad; and
a plate-shaped frame installed in the pair of side frames,

a pad contact surface of the front elastic member that is inclined rearward with respect to a horizontal plane;
a pad contact surface of the rear elastic member that is inclined forward with respect to the horizontal plane or parallel thereto;
a rear end of the plate-shaped frame is disposed in front of the front elastic member in a seat front-to-rear direction;
the front elastic member and the rear elastic member are disposed while being separated from each other by a predetermined distance such that an ischial tuberosity of an occupant is positioned at a space between the front elastic member and the rear elastic member; and
a front end of the front elastic member is located above a level of the rear end of the plate-shaped frame in a seat top-to-bottom direction.

2. The seat cushion according to claim 1 , wherein the rear end of the plate-shaped frame is provided to satisfy a relation of 0.73≦α/β≦1.09 when a height from the rear end to a hip point of a three-dimensional mannequin based on SAE J-826 is denoted by α, a distance from the rear end to the hip point in the front to back direction is denoted by β, and a ratio between the α and the β is denoted by α/β.

3. The seat cushion according to claim 2 , wherein:
the α is in a range of 85 to 105 mm; and
the β is in a range of 96 to 116 mm.

4. The seat cushion according to claim 1 , wherein:
the plate-shaped frame comprises a pan frame having a support surface for supporting the occupant;
a lock portion for locking the front elastic member is provided in each of the pair of side frames; and
both end portions of the front elastic member are locked to the lock portions respectively to extend from a back to a front direction.

5. The seat cushion according to claim 1 , wherein:
the plate-shaped frame comprises a pan frame;
the pan frame comprises a support surface for supporting the occupant; and
the support surface comprises a concave portion that is:
depressed downward; and
located at a rear end portion and a central portion in a right-to-left direction of the support surface.

6. A seat cushion comprising:
a seat base frame;
a cushion pad which is placed on the seat base frame; and
a skin material which covers the seat base frame and the cushion pad, wherein:
the seat base frame comprises:
a pair of side frames that extends in a front to back direction;
a front elastic member that is installed in the pair of side frames and is in contact with the cushion pad;
a rear elastic member that is separated from the front elastic member by a predetermined distance and is in contact with the cushion pad; and
a plate-shaped frame installed in the pair of side frames,

a pad contact surface of the front elastic member that is inclined rearward with respect to a horizontal plane;
a pad contact surface of the rear elastic member that is inclined forward with respect to the horizontal plane or parallel thereto;
the plate-shaped frame is disposed in front of the front elastic member;
the front elastic member and the rear elastic member are disposed while being separated from each other by a predetermined distance such that an ischial tuberosity of an occupant is positioned at a space between the front elastic member and the rear elastic member; and
when a degree of an acute angle formed between the pad contact surface of the front elastic member and the horizontal plane is denoted by θ 1 and a degree of an acute angle formed between the pad contact surface of the rear elastic member and the horizontal plane is denoted by θ 2 , a relation of θ 1 >θ 2 is established.

7. The seat cushion according to claim 6 , wherein when a ratio between the θ 1 and the θ 2 is denoted by θ 2 /θ 1 , a relation of 0≦θ 2 /θ 1 ≦0.18 is established.

8. The seat cushion according to claim 7 , wherein:
the θ1 is in a range of 17 to 21°; and
the θ2 is in a range of 0 to 3°.

9. The seat cushion according to claim 8 , wherein a rear end of the plate-shaped frame is provided to satisfy a relation of 0.73≦α/β≦1.09 when a height from the rear end to a hip point of a three-dimensional mannequin based on SAE J-826 is denoted by α, a distance from the rear end to the hip point in the front to back direction is denoted by β, and a ratio between the α and the β is denoted by α/β.

10. The seat cushion according to claim 9 , wherein:
the α is in a range of 85 to 105 mm; and
the β is in a range of 96 to 116 mm.

11. The seat cushion according to claim 7 , wherein a rear end of the plate-shaped frame is provided to satisfy a relation of 0.73≦α/β≦1.09 when a height from the rear end to a hip point of a three-dimensional mannequin based on SAE J-826 is denoted by α, a distance from the rear end to the hip point in the front to back direction is denoted by β, and a ratio between the α and the β is denoted by α/β.

12. The seat cushion according to claim 11 , wherein:
the α is in a range of 85 to 105 mm; and
the β is in a range of 96 to 116 mm.

13. The seat cushion according to claim 6 , wherein a rear end of the plate-shaped frame is provided to satisfy a relation of 0.73≦α/β≦1.09 when a height from the rear end to a hip point of a three-dimensional mannequin based on SAE J-826 is denoted by α, a distance from the rear end to the hip point in the front to back direction is denoted by β, and a ratio between the α and the β is denoted by α/β.

14. The seat cushion according to claim 13 , wherein:
the α is in a range of 85 to 105 mm; and
the β is in a range of 96 to 116 mm.

15. A vehicle seat comprising:
the seat cushion according to claim 1 ; and
a seatback.

Assignees

• Sugiyama Shinji
• Ts Tech Co Ltd

Inventors

• Sugiyama Shinji

Classifications

• B60N2/72

  Attachment or adjustment thereof · CPC title

• B60N2/646

  shape of the cushion · CPC title

• B60N2/7094 Primary

  Upholstery springs · CPC title

• B60N2/64 Primary

  Back-rests {or cushions (B60N2/2222 takes precedence)} · CPC title

• B60N2/682 Primary

  Joining means · CPC title