| 摘要 |
PURPOSE:To prevent exactly overload to a motor from being generated and to aim at improvements in stability and reliability, by making a seat belt driving gear incorporated with a motor controlled according to electric current flowing time or power supply, etc. which are computed by computation means. CONSTITUTION:As shutting a door after a driver rides in a car by opening the door, a door switch SWD is switched on a 'close' side and a relay circuit RL is operated by turning on a timer TM2. Thereby a motor reverses, shifting a movable material at a release end to set end side for auto-setting the seat belt. When the motor M is powered, signals on respective lines L1 and L2 are supplied on the base of transistor TR1 through a NAND circuit, and if one of two input pots in the NAND circuit is impressed with high level signals, a capacitor C is discharged by turning off TR1, and when its output voltage is a specified value or more, the motor is stopped by turning off TR2. |
