| 摘要 |
A motor vehicle safety mechanism has a component which can be displaced out of a rest position suddenly into an action position by release of a holding device. Such a motor vehicle safety mechanism is, for example, a head support/roll bar which extends automatically in an accident. The holding device has a latch which fixes the component in the rest position and a ratchet arrangement which holds the latch in the action or engagement position. The ratchet arrangement has ratchet kinematics and an adjustable blocking element. By moving the latch out of the engagement position into the direction of the release position, the ratchet kinematics are moved and the blocking element blocks the movement of the ratchet kinematics.
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