Seat backrest

Patent metadata

Field	Value
Publication number	US-9694723-B2
Application number	US-201314432772-A
Country	US
Kind code	B2
Filing date	Sep 30, 2013
Priority date	Oct 1, 2012
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

A seat backrest includes right and left side frame segments, a pressure receiving member disposed between the side frame segments movably in a front-back direction, and a cushion pad covering the front of the side frame segments and pressure receiving member. The pressure receiving member includes a main body part, and extending parts extending laterally from both sides of the main body part. The cushion pad includes a back receiving part covering the front of the main body part, and bank parts disposed on both sides of the back receiving part, protruding forward from both sides, and covering the front of the extending parts and side frame segments. A recess is formed at an area, facing a corresponding extending part of the extending parts, of a rear surface of each bank part.

First claim

The invention claimed is:

1. A seat backrest, comprising:
right and left side frame segments disposed in parallel in a right-left direction;
a pressure receiving member disposed between the side frame segments, the pressure receiving member being movable in a front-back direction; and
a cushion pad covering front surfaces of the side frame segments and a front surface of the pressure receiving member,
wherein the pressure receiving member includes:
a main body part; and
right and left extending parts extending rightward and leftward from right and left sides of the main body part,

wherein the cushion pad includes:
a back receiving part covering a front surface of the main body part, and
bank parts disposed on right and left sides of the back receiving part, protruding forward from right and left sides of a front surface of the back receiving part, and covering front surfaces of the extending parts and the front surfaces of the side frame segments, and

wherein a recess is formed at an area of a rear surface of each bank part, the area facing a corresponding extending part of the extending parts,
each extending part fits in the recess, and
each extending part is away from an inner circumferential wall of the recess.

2. The seat backrest according to claim 1 , wherein a gap between a lower inner circumferential wall of the recess and the extending part is larger than a gap between an upper inner circumferential wall of the recess and the extending part.

3. A seat backrest, comprising:
right and left side frame segments disposed in parallel in a right-left direction;
a pressure receiving member disposed between the side frame segments, the pressure receiving member being movable in a front-back direction; and
a cushion pad covering front surfaces of the side frame segments and a front surface of the pressure receiving member,
wherein the pressure receiving member includes:
a main body part which is a plate member and extends vertically and horizontally; and
right and left extending parts respectively extending rightward and diagonally forward and leftward and diagonally forward from right and left sides of the main body part,

wherein the main body part and the extending parts are formed integrally,
wherein the cushion pad includes:
a back receiving part covering a front surface of the main body part, and
bank parts disposed on right and left sides of the back receiving part, protruding forward from right and left sides of a front surface of the back receiving part, and covering front surfaces of the extending parts and the front surfaces of the side frame segments, and

wherein a recess is formed at an area of a rear surface of each bank part, the area facing a corresponding extending part of the extending parts, the recess providing a space into which recess areas of the bank parts retreat and bend.

4. The seat backrest according to claim 3 , wherein each extending part is in contact with the rear surface of the bank part in the recess.

5. The seat backrest according to claim 3 , wherein the area of the recess of each bank part has a material that is harder than materials of other areas of the bank part.

6. The seat backrest according to claim 3 , wherein a step protrudes from a bottom of each recess diagonally backward to a lateral side, the step being a lateral edge of the recess.

7. The seat backrest according to claim 6 , wherein each step protrudes diagonally backward to the lateral side such that the step deviates from a trajectory of a front edge of the extending part, the trajectory being drawn when the extending part is pressed and bent backward by the area of the recess of the bank part.

8. The seat backrest according to claim 3 , wherein the cushion pad has right and left slits, each slit being formed at a boundary between the back receiving part and the corresponding bank part and penetrating from a front surface to a rear surface of the cushion pad, and
wherein each extending part extends across the corresponding slit on a rear of the back receiving part and the bank part.

9. The seat backrest according claim 8 , wherein a vertical length of the slit is greater than a vertical length of the extending part.

10. The seat backrest according to claim 8 , wherein each recess is disposed along an edge, adjacent to the bank part, of the slit and extends from the edge, adjacent to the bank part, of the slit toward a lateral side, and
wherein each slit extends downward from a lower inner circumferential wall of the recess.

11. The seat backrest according to claim 8 , further comprising:
a skin covering the cushion pad;
right and left pulling members disposed on a rear surface of the skin; and
a hook and loop fastener disposed on the pulling members,
wherein the pulling members extend through the slits and are routed to a rear surface of the back receiving part, the back receiving part is tightened with the pulling members, the pulling members are bonded with the hook and loop fastener, and a dent is formed at an area on the rear surface of the back receiving part, the area overlapping with the hook and loop fastener.

12. The seat backrest according to claim 3 , further comprising:
an upper frame segment bridging top ends of the side frame segments;
a lower frame segment bridging bottom ends of the side frame segments; and
a wire rod put across a frame, the frame including the upper frame segment, the lower frame segment, and the side frame segments,
wherein the pressure receiving member is coupled to the frame via the wire rod, and the pressure receiving member supports load from an occupant, and
wherein a front edge of each extending part does not overlap with the wire rod in front view.

13. The seat backrest according to claim 12 , wherein the wire rod is put across the frame vertically.

14. The seat backrest according to claim 13 , wherein
the wire rod includes a bent segment which is bent convexly inward in the right-left direction and
wherein the extending parts are at least partially disposed within a vertical range from a top end to a bottom end of the bent portion.

15. The seat backrest according to claim 14 , wherein
the extending parts are formed within the vertical range from the top end to the bottom end of the bent portion.

16. The seat backrest according to claim 12 , wherein a coupling portion between the wire rod and the pressure receiving member is on each extending part.

17. The seat backrest according to claim 12 , wherein a moving trajectory of the front edge of each extending part drawn at a time of deformation of the extending part lies inside of the side frame segments in the right-left direction.

18. The seat backrest according to claim 3 , further comprising a support position adjuster disposed on the pressure receiving member and configured to adjust a supporting position of an occupant by deforming the cushion pad.

19. The seat backrest according to claim 18 , wherein
the support position adjuster includes a main body airbag that is mounted on a front of the main body part and inflates and deflates to deform the cushion pad, and
wherein the extending parts extend diagonally forward from the right and left sides of the main body part and are at least partially disposed within a vertical range of the main body airbag.

20. The seat backrest according to claim 19 , wherein
the support position adjuster includes extending part airbags that are mounted on the respective extending parts and inflate and deflate to deform the cushion pa

Assignees

• Ts Tech Co Ltd

Inventors

• Shimizu Shuichi

Classifications

• B60N2/66

  Lumbar supports · CPC title

• B60N2/665

  using inflatable bladders · CPC title

• B60N2/72

  Attachment or adjustment thereof · CPC title

• B60N2/42 Primary

  the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats (for protecting children B60N2/26; arm-rests B60N2/75; head-rests B60N2/888) · CPC title

• B60N2/42745

  of the back-rest (B60N2/433 takes precedence; higher part of the back-rest moving together with the headrest B60N2/888) · CPC title