| 摘要 |
An S-spring 14 is provided in a state of tension between a pair of seat back frames 10 constituting a vehicle seat 1. A support section 16a of a bracket 16 fixed to the seat back frame 10 supports a part of an end of the S-spring 14 from behind. The support section 16a is formed with a length equal to or greater than one pitch of the S-spring 14 in a no-load state and discontinuously supports center portions alpha of the S-spring 14. When a load equal to or greater than a predetermined level acts on the S-spring 14, the S-spring 14 is stretched to cause the center portions alpha to be dislocated from the support sections 16a, and as a result, the length of a deflectable portion of the S-spring 14 is changed. |
