| 摘要 |
When a decision is made that a vehicle has a risk of collision, the main control section of a control unit (13) drives for rotating a motor (12) in the winding direction of a seatbelt (3) to increase tension thereof. When the seatbelt (3) has a specified tension, the main control section sustains driving of the motor (12) for winding the seatbelt (3) for a specified duration if a decision is made that a lock signal has been inputted, otherwise lowers the driving force of the motor (12) thus lowering tension of the seatbelt (3). Since tension of the seatbelt (3) is controlled to immediately lower so long as no lock signal is delivered from a lock signal generating section (18) even if a collision risk signal is delivered erroneously from a collision risk judging section (11), a passenger (A) can avoid unpleasant feeling due to useless restriction by the seatbelt (3) over a relatively long time. <IMAGE> |
