Belt tightener for safety belt system has band whose first end is fixed to shaft and whose second end is coupled to drive element and that is wound at least once around shaft before activating drive unit

摘要

The device has a shaft (14) rotatably mounted in a housing (12) for coupling to the axle of the belt reel, a drive unit (30) and a drive element (16) which moves along a curved path when the drive unit is activated. A band (22) is provided whose first end (24) is fixed to the shaft and whose second end (26) is coupled to the drive element, whereby the band is wound at least once around the shaft before activating the drive unit.