Cushion plate for vehicle seat

• US 20060232114A1
• Filed: 10/27/2005
• Published: 10/19/2006
• Est. Priority Date: 07/06/2004
• Status: Active Grant

• Current Assignee: TS Tech Company Limited
• Original Assignee: TS Tech Company Limited
• Inventors: Sugiyama, Shinji, Kizawa, Yutaka
• Granted Patent: US 7,290,837 B2
• Time in Patent Office: Days
• US Class Current: 297/284.400
• CPC Class Codes: B60N 2/66 Lumbar supports
• CPC Class Codes: B60N 2/7094 Upholstery springs

Abstract

A vehicle seat includes a seat back frame of a rectangular shape having a pair of side frames, upper and lower seat springs mounted between the side frames, and a flexible cushion plate in the form of a single plate attached to the seat springs. The cushion plate has a lower wide section supporting the vicinity of ilia (S) of a seated occupant (P), and a narrow middle section for reducing hold performance for the vicinity of a waist of the seated occupant (P). The cushion plate has an upper edge projecting slightly higher than a ninth dorsal vertebra (R) of the seated occupant (P).

Claims

1. A vehicle seat comprising:

a seat back frame of a rectangular shape having a pair of side frames;

upper and lower seat springs mounted between the side frames;

a flexible cushion plate in the form of a single plate attached to the seat springs; and

a seat back cushion supported by the cushion plate;

wherein the cushion plate has an upper edge projecting slightly higher than a ninth dorsal vertebra (R) of a seated occupant (P), and

wherein the cushion plate has a lower wide section supporting the vicinity of ilia (S) of the seated occupant (P).

2. The vehicle seat according to claim 1, wherein the lower wide section has in its lower part a tapered downward projection so as to support the vicinity of sacra (T) of the seated occupant (P).

3. The vehicle seat according to claim 2, wherein the downward projection is situated between left and right musculi glutei of the seated occupant (P).

4. The vehicle seat according to claim 1, wherein the upper edge has a gently arcuate shape curving downward in the middle.

5. The vehicle seat according to claim 2, wherein the upper edge has a gently arcuate shape curving downward in the middle.

6. The vehicle seat according to claim 3, wherein the upper edge has a gently arcuate shape curving downward in the middle.

7. The vehicle seat according to claim 1, wherein the cushion plate has a narrow middle section for reducing hold performance for the vicinity of a waist of the seated occupant (P).

8. The vehicle seat according to claim 2, wherein the cushion plate has a narrow middle section for reducing hold performance for the vicinity of a waist of the seated occupant (P).

9. The vehicle seat according to claim 3, wherein the cushion plate has a narrow middle section for reducing hold performance for the vicinity of a waist of the seated occupant (P).

10. The vehicle seat according to claim 4, wherein the cushion plate has a narrow middle section for reducing hold performance for the vicinity of a waist of the seated occupant (P).

11. The vehicle seat according to claim 1, wherein the upper seat spring is disposed at the same height as the ninth dorsal vertebra (R).

12. The vehicle seat according to claim 2, wherein the upper seat spring is disposed at the same height as the ninth dorsal vertebra (R).

13. The vehicle seat according to claim 3, wherein the upper seat spring is disposed at the same height as the ninth dorsal vertebra (R).

14. The vehicle seat according to claim 4, wherein the upper seat spring is disposed at the same height as the ninth dorsal vertebra R.

15. The vehicle seat according to claim 7, wherein the lower seat spring is disposed near the boundary of the narrow middle section and the lower wide section.