Patent ID: 8254065

Claim:
A power supply structure for a piezoelectric actuator having a conductive base member, a movable member, and a piezoelectric element, the piezoelectric element being arranged between the base member and the movable member and configured to cause a shear deformation to minutely move the movable member relative to the base member when receiving electric power, the power supply structure comprising; the base member being electrically conductive and having a joint face to the piezoelectric element; the movable member having a joint face to the piezoelectric element; the piezoelectric element having first and second electrodes that are planar and arranged on opposite faces of the piezoelectric element, the first electrode being joined with the joint face of the base member so that they are electrically conductive to each other and the second electrode being joined with the joint face of the movable member; a wiring connector being electrically conductive and having first and second faces arranged opposite to each other, the first face being joined with the second electrode of the piezoelectric element so that they are electrically conductive to each other; a wiring member having a conductive base layer attached to the second face of the wiring connector, an insulating layer formed on the base layer, and a conductor layer formed on the insulating layer, the conductive base layer having an insular part for attachment to the wiring connector and a main part separated from the insular part; a through hole formed in the wiring member through at least the insulating layer of the wiring member; and a contact formed in the through hole, to electrically connect the conductor layer of the wiring member and the wiring connector to each other.