Seat belt tightener e.g. spherical tightener, for safety seat belt system, has multifunctional part moved away from drive unit against force transmission unit, and comprising valve section and sealing section engaged at tightener housing

摘要

The tightener (10) has a tightener housing (12), and a force transmission unit (20) moved by a drive unit (24). A multifunctional part (28) is provided between the drive unit and the force transmission unit. The multifunctional part is moved away from the drive unit against the force transmission unit. The multi-functional part has a valve section and a sealing section engaged at the tightener housing. The multi-functional part has an outlet opening in a bursting unit i.e. bursting disk, in a non-activated condition. The bursting unit is arranged between a sealing body and a valve body.