Patent ID: 6499554
Filing Date: 2002-12-31
Classification: B60R

Abstract:
A seat belt retractor comprising:a frame, a reel rotationally supported by the frame for winding a seat belt, reel urging means connected to the reel for always urging the reel in a seat belt winding direction, locking means provided between the frame and the reel for allowing the reel to rotate freely in a normal state and preventing the reel from rotation in a belt unwinding direction when necessary, and a belt tension control mechanism for controlling a belt tension of the seat belt, and including a motor for generating a rotational torque; a power transmission path situated between the motor and the reel and having a speed reducing mechanism therein, an OFF-state in which the rotational torque of the motor is not transmitted between the motor and the reel and an ON-state in which the rotational torque is transmitted between the motor and the reel; and a power transmission path switching mechanism for selectively switching the power transmission path between the ON-state and the OFF-state and having a stop lever engageable with the speed reducing mechanism so that when the motor is actuated, the stop lever is engaged with the speed reduction mechanism to transfer the rotational torque of the motor to the reel for winding the seat belt.