Vehicle seat with forward folding backrest has bolt with circumferential groove set before detent recess in locking state and filled with material flush with surface of bolt but destroyed under crash pressure

摘要

The vehicle seat has in the upper edge area a locking device with bolt (8) having in its front end area (8.1) a circumferential groove which in the locked state and seen from the front end of the bolt is mounted before the detent recess (11) formed in a part adjoining the backrest. The wall of the groove is formed by a first section tapering down to the free end of the bolt and an adjoining section (14) rising perpendicularly up to the centre axis of the bolt. The groove is filled out flush with the surface of the bolt by a material (15) which can be crushed under strong pressure.