Patent ID: 8777269

Claim:
A self-locking seat belt retractor for a motor vehicle safety belt comprising a belt shaft pivot-mounted in a frame, onto which a safety belt can be wound, a locking device locking the belt shaft when a predetermined extraction acceleration of the safety belt in the direction of extraction of the safety belt is exceeded, a control disc ( 1 ) pivot-mounted on the belt shaft and spring-pretensioned in the direction of extraction of the safety belt, and on which an inertia mass ( 5 ) mounted for swivel motion around a swivel axis (S) which is parallel to the rotational axis (D) of the belt shaft, the control disc ( 1 ) forming a projection ( 11 ) restricting the relative transverse movement between the inertia mass ( 5 ) and the control disc ( 1 ), which is directed transversely to the plane of the swivel motion of the inertia mass ( 5 ), the projection ( 9 , 11 ) forming two contact surfaces ( 14 , 15 ) restricting the relative transverse movement of the inertia mass ( 5 ) on two axially opposed sides of the inertial mass.