Belt Retractor And Pretensioner Combination

摘要

The invention relates to a seat belt retractor including a pretensioner especially for use in motor vehicles. The seat belt retractor includes a spool belt which supports belt webbing of the seat belt and rotates in the take-up direction of the safety belt when the pretensioning drive coupled to the belt spool is activated. The belt spool is associated with a drivewheel with recesses on the periphery thereof for accepting mass bodies acting as drive means for pretensioning the seat belt. The mass bodies are stored in a tube, which tangentially flows into the drivewheel, and the mass bodies are accelerated in the tube by means of a gas generator arranged at one end of the tube.