Seat belt tightener for a motor vehicle's seat belt has a seat-belt roll-up device and a tightener drive mechanism to link to a seat belt spindle on the roll-up device

摘要

In addition to a force-limiting device (FLD) that transfers rotating motion in a tightening drive mechanism (TDM) onto a seat belt spindle (SBS) (11), a deforming element (DE) (35) is locked in a torque transmission path between the TDM and the SBS. When triggered, the DE limits torque in the FLD initiated by the TDM.