Motor vehicle seat structure, has mobile structure connected to fixed structure by bistable connection to move mobile structure to safety position when force exceeds value, where mobile structure is moved to position beyond limit position

摘要

The structure has a backrest structure (2b) with a mobile structure (2d) carrying a headrest (3) and connected to a fixed structure (2c) by a bistable connection. The structure connection elastically moves the structure (2d) to a normal utilization position as long as a force exerted rearwards on a support unit (30) of the structure (2d) remains below a preset force, and to a safety position when the force exceeds the value. The structure (2d) is moved to the safety position beyond a certain limit position. The connection has a flexion spring (51) and a stop pin (28) engaged in a slot (70).