Piezoelektrische Verstellvorrichtung

The invention relates to a piezoelectric adjustment device for executing rotary movements, comprising a rotary plate (1) and a drive element (5) having at least one piezoactuator (12). The adjustment device, which executes high-precision, reproducible rotary movements with a rotary angle also greater than 360 degrees, is characterized by the fact that the rotary plate (1) is provided on its underside with a base (3) arranged coaxially to the axis of rotation (2) of the rotary plate and deisgned in the shape of a truncated cone, that the drive element (5) consists of an adapter (7) capable of rotating about an angular amount, and having a cone (6) to receive the base plate (8), a holder (9) fixed in the direction of rotation in relation to a base plate (8) and a support (10) fixed in the same way, whereby the adapter (7) is connected to the holder (9) fixed in the direction of rotation via a rotary joint (11) whose rotation point is on the rotation axis (2) of the rotary plate (1), and whereby the piezoactuator (12) firstly engages with the fixed support (10) and secondly outside the rotary point forming a lever on the adapter (7), that a second drive element (14) is provided with which the drive element (5) can be raised or lowered for the rotary movement in such a way that when the base (3) of the rotary plate (1) is in raised state in relation to the cone (6) of the adapter (7), and that at least three ...