Abstract: A self-locking safety belt retractor has a blocking apparatus for a belt shaft mounted rotatably in a housing. The blocking apparatus includes a pawl inserted into a recess of the shaft front of the belt shaft which can be pivoted radially outward into engagement with the blocking apparatus. A blocking gearing (12) is oriented with respect to stop surfaces of the pawl (16) and to force transmission surfaces (25, 32) of the recess (15) such that, when the gear teeth of the pawl (16) are engaged in the blocking gearing (12) under normal load, a force acts between the blocking gearing (12) and the belt shaft (13) in a radial direction. If the load increases in a crash case, a force is transmitted in the circumferential direction due to plastic deformation of at least one housing gear tooth (28, 26) of the blocking gearing (12).

Abstract: A self-locking safety belt retractor with a belt band sensitively and/or motor vehicle sensitively controllable blocking apparatus for a belt shaft mounted rotatably in the housing segments of a U-shaped housing, whereby the blocking apparatus includes a pawl inserted into a recess of the shaft front of the belt shaft which can be radially swivelled out up to engagement into a blocking apparatus constructed on the allocated housing segment is characterized in that the blocking gearing (12) on the one hand and the stop surfaces of the pawl (16), as well as the force transmission surfaces (25, 32) of the recess (15) of the shaft front (14) on the other hand are oriented in relation to each other such that when the gear teeth of the pawl (16) are engaged in the blocking gearing (12) under normal load, a transmission of force takes place between the blocking gearing (12) and the belt shaft (13) in a radial loading direction, and in that in the event of a load rising in a crash case, the load additionally arising