Patent ID: 6737819
Filing Date: 2004-05-18
Classification: B60R

Abstract:
A motor retractor system, comprising:a seat belt; a first winding device attached to one end of the seat belt and having a motor and a spool for winding the seat belt, said motor being connected to the spool so that the seat belt can be withdrawn from the spool as desired without operation of the motor, and when the motor is actuated, the motor winds the seat belt for an amount only withdrawn from the spool; a second winding device attached to the other end of the seat belt and having a tension-applying device for always applying a tension to the belt and another spool for winding the seat belt, said tension-applying device being attached to the another spool so that when the belt is in use, only the second winding device generates tension to a wearer and the seat belt is freely withdrawn from the another spool of the second winding device while receiving tension to wind the seat belt by the tension-applying device; a through-tongue slidably attached to the seat belt; a buckle to be connected to the through-tongue; a detecting device attached to at least one of the through-tongue and the buckle for detecting a release of the through-tongue from the buckle; and a control unit electrically connected to the detecting device and the first winding device, said control unit, upon detection of the release of the through-tongue from the buckle through the detecting device after withdrawing the seat belt from the first and second winding devices and connecting the through-tongue to the buckle, actuating the motor of the first winding device to wind the seat belt to the first winding device for only the amount withdrawn from the spool of the first winding device.