| 摘要 |
<p>The invention relates to a passive safety device for a vehicle seat operating before the possible crash, said seat provides a seat frame, coupled with the vehicle floor, and a back frame, as well as an intermediate frame, movably provided on said seat frame and on which it is pivoted for adjustment of said back frame, and a seatbelt, provided with a fixing point, a winder and a buckle for fixing said belt, said passive safety device providing an actuator, acting by coupling means with said fixing point, with said actuator and with said buckle of the seatbelt, following a "pre-crash" signal from a sensor, in order to realize a pre- tensioning of the seatbelt, said actuator further acting on said intermediate frame to make it advancing before a rear-ending, or moving backward before and/or during a front crash, thus causing displacement of the back frame.</p> |
