Belt-pretensioner for seat belt system, has spring unit pre-stressed during activation of drive unit and coupled with drive unit and housing, and drive component moving relative to housing during activation of drive unit

摘要

The pre-tensioner (10) has a housing (12), a drive unit (42) and a drive component (18), which moves relative to the housing during activation of the drive unit. A spring unit (30) is pre-stressed during activation of the drive unit and is coupled with the drive unit and the housing. The spring unit is arranged in a guidance (28) and the drive component is movable on a circular path (K). The drive component (18) has a section (26) without tooth work, which is arranged in an area of a pinion (14) before activation of the drive unit.