Patent ID: 7187103
Filing Date: 2007-03-06
Classification: H02N

Abstract:
1. A piezoelectric drive for producing a relative movement in a movement plane between a first body and a second body, said drive comprising at least one piezoelement which may be driven with a high-frequency alternating voltage, and a resonator ( 4 ) with a tapering horn ( 7 ), said resonator being mechanically coupled to the piezoelement and able to be excited by the piezoelement in a standing wave, wherein the resonator ( 4 ) is connected to the first body and a region ( 8 ) of the horn may be pressed against a surface ( 10 ) of the second body ( 2 ), wherein the drive comprises a drive plate ( 1 ) that forms the first body or is fastened on the first body and that is arranged parallel to the movement plane, wherein the drive plate ( 1 ) comprises a rest region ( 3 ) and at least one resonator region ( 4 ), wherein between the rest region ( 3 ) and the resonator region ( 4 ) there is arranged a spring region ( 5 ) that is resilient parallel to a plane of the drive plate ( 1 ), a flat piezoelement ( 6 ) is coupled laterally onto the at least one resonator region ( 4 ), and wherein the second body ( 2 ) may be positioned relative to the drive plate ( 1 ) such that the at least one resonator region ( 4 ), with a contact edge region ( 8 ) lying in the region of the horn by way of a pretension of the spring region ( 5 ), is pressed against a surface ( 10 ) of the second body ( 2 ), which is aligned essentially transverse to the plane of the drive plate ( 1 ) such that the second body may be driven ( 1 ) such that the second body may be driven essentially parallel to the surface ( 10 ).