Patent ID: 7378777

Claim:
A drive apparatus for driving a driven body, comprising: a vibrating body having a piezoelectric element and an abutting part driving the driven body by vibration of the vibration body by application of voltage to the piezoelectric element; a control circuit configured to control the application of the voltage to the piezoelectric element; a first electrode being configured on a surface of the piezoelectric element, the first electrode being one in the center of three electrodes divided in the width direction of the piezoelectric element; a second electrode being configured on the surface of the piezoelectric element, the second electrode being one pair of four electrodes that are divided from two electrodes each of which is configured each longitudinal side of the first electrode, the pair of electrodes being diagonally configured with the first electrode intervening; a third electrode being the other pair of the four electrodes; and the control circuit switching between a first drive condition and a second drive condition, the first drive condition where the abutting part elliptically oscillates in a first way by application of voltage only to the first electrode and the second electrode, the second drive condition where the abutting part elliptically oscillates in a second way opposite to the first way by application of voltage only to the first electrode and the third electrode.