BELT RETRACTOR

The present invention relates to a belt retractor comprising a belt shaft, which is mounted rotatably in a frame and on which a safety belt can be wound, and a force-limiting unit which, when activated, enables a rotational movement of the belt shaft in the extension direction of the safety belt, wherein the force-limiting unit comprises an electric motor and a first blocking device, and the first blocking device is configured to release and again block, in a manner actuated by the activation of the electric motor, a rotational movement of the belt shaft in the extension direction in a repeating sequence.