Piezoelectric actuator, timepiece, and electronic device
AssigneeSeiko Epson Corporation
InventorsJoji Kitahara, Shigeaki Seki
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Abstract
A piezoelectric actuator A has an oscillator 10 that has a flat base layer 32 and piezoelectric elements 30, 31 layered on the base layer 32 and oscillates as a result of a drive signal applied to the piezoelectric elements 30, 31, and a rotor 100 driven by vibrations from the oscillator 10. The piezoelectric actuator A includes a fastening part 11 for securing the oscillator 10, and lead substrates 14A, 14B that are secured to the fastening part 11 for applying a drive signal to the piezoelectric elements from a drive circuit 500 for driving the piezoelectric elements 30, 31. The lead substrates 14A, 14B have connecting parts 17A-17C extending to the power supply electrodes 33A, 33C and a detection electrode 34.
Claims12
A piezoelectric actuator having an oscillator that has a flat base layer and a piezoelectric element layer on the base layer, and the oscillator vibrates as a result of a drive signal applied to the piezoelectric element layer, and a driven member that is driven by vibration of the oscillator, the piezoelectric actuator comprising:
- a fastening part that secures the oscillator;
- and
- a lead substrate secured to the fastening part for applying a drive signal from a drive circuit for driving the piezoelectric element layer;
- wherein the lead substrate has a conductive member that extends to an electrode on the piezoelectric element layer.
Dependencies are inferred from the claim text.