PIEZOELECTRIC DRIVE DEVICE

摘要

The invention relates to a drive device having at least one substantially parallelepiped piezoelectric element and means for generating oscillation of the piezoelectric element in a plane of oscillation (x/y planes), wherein a tappet for exerting an impact force in an impact direction (x direction) is provided on at least one outer surface of the piezoelectric element. In order to improve effectiveness, a single central suspension element is provided inside the piezoelement in the center of the piezoelement that exerts a prestressing force on the piezoelectric element in the direction of impact.