Patent ID: 6343759
Filing Date: 2002-02-05
Classification: B60R

Abstract:
A seat belt retractor comprising:(a) a belt reel mounted in a non-rotatable manner on a frame; (b) a motive spring that biases the belt reel in a winding direction; (c) an electrical driving device that adjusts a spring force of the motive spring; (d) a clutch located between the electrical driving device and the belt reel to transmit a torque produced by the electrical driving device to the belt reel, the clutch comprising a deformable spring that can be deformed by the torque and when deformed, brings the clutch into an engaged state, a first end of the deformable spring is connected via a bearing part to the electrical driving device and a second end of the deformable spring is connected via an adjusting element, that can be moved by an actuating device in response to a signal from a vehicle sensor, to the belt reel via an interlocking fit, the interlocking fit between the deformable spring and the belt reel is formed by a clutch locking mechanism that can be brought by the adjusting element into coupling engagement with the belt reel, wherein the clutch locking mechanism has an annular configuration with peripheral teeth, the clutch locking mechanism in the engaged state being located in a position eccentric to the belt reel axis and the teeth engaging in part with peripheral teeth connected in a non-rotatable manner to the belt reel.