| 摘要 |
Disclosed is a self-locking safety belt retractor comprising a blocking element which can be triggered in a belt band-sensitive and/or vehicle-sensitive manner and blocks the rotation of the belt shaft in the unwinding direction of the belt, and a tensioning drive which acts upon the belt shaft and rotates said belt shaft in the winding direction of the safety belt when being triggered. The inventive safety belt retractor is characterized by the fact that the tensioning drive which is provided with two parts ( 14, 15; 26, 32 ) that move relative to each other when said tensioning drive is triggered, is disposed on the belt shaft without being connected to the housing ( 10 ) of the belt retractor and rotates along with the belt shaft before being triggered. Furthermore, one part of the tensioning drive is fixed by means of the blocking element ( 17 ) as an abutment for the tensioning movement of the second part of the tensioning drive when the tensioning drive is triggered.
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