Automobile vehicle seat, has framework coupled to support structure by primary and secondary connections that maintain backrest in usage position, and enable superior part of backrest to move towards rear until safe position

摘要

The seat has a support structure (5) with a rear beam part (7) including a head-support (4). A framework (8) of a backrest is connected to the support structure (5) by primary and secondary connections (10, 14) which are arranged at different heights. The connections normally maintain the backrest in a usage position, and enable a superior part of the backrest to move towards rear until a safe position. The connections enable the superior part of the backrest to move towards rear until a safe position when the backrest subjects to a strong solicitation higher than a predetermined limit, towards rear.