Patent ID: 6598821
Filing Date: 2003-07-29
Classification: B60R

Abstract:
A seat belt retractor comprising:(a) a winding reel rotatably mounted in a frame; (b) an electric motor; and (c) a switching mechanism with which varying torques can be transmitted to the winding reel to adjust the comfort of a user of a seat belt or to tighten the seat belt, wherein the switching mechanism, depending on a change in number of revolutions or the number of revolutions with which each torque has been transmitted, can be directed into a corresponding switch position, the switching mechanism comprising a coupling device that comprises at least one engageable coupling element that, as a result of an inertial moment of a sensor mass provided at a predetermined distance from the rotational axis of a driving part, can be actuated at a certain number of revolutions or change in number of revolutions of the driving part.