Retractor for a vehicle safety belt

Belt winder for a vehicle seat belt comprises a frame, a belt reel drive part (12) rotatably arranged on the frame, provided with an external toothed arrangement (20), and connected to a belt reel, and a ratchet controlled by a sliding clutch with a friction spring (52) in the external toothed arrangement. Preferred Features: The ratchet is mounted in a wheel (24). The sliding clutch induces relative rotation between the wheel and a clutch disk (34).