Lock for use in crash active unit e.g. headrest, of vehicle seat, has actuator box designed as testing unit and including magnet unit and drive consisting of levers and/or latches for retaining or releasing spring and/or clamp

摘要

The device has a support and an impact unit, which is coupled to the support by a four joint. The impact unit is driven by a spring, and is extended to a position closer to a head of an occupant during the crash. An actuator box is designed as a testing unit and includes a magnet unit (43) and a drive with levers (45, 47) and/or latches (49), where the drive is arranged within a closed housing of the box. The magnet unit and the drive retain the spring and/or a clamp acted upon by the spring in the normal case and releases the spring and/or the clamp during the crash.