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US 8,525,387 B2Granted
Piezoelectric actuator, motor, robot hand, and robot
AssigneeSeiko Epson Corporation
InventorsKoichi Kamijo, Osamu Miyazawa, Akihiro Sawada, Reiko Nagahama
Life of this patent
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Abstract
A motor includes a vibrating plate having a projection part to be pressed against a driven member and a piezoelectric material provided on the vibrating plate, wherein a Young's modulus EL in the pressing direction of the vibrating plate and a Young's modulus ES in a direction crossing the pressing direction are different.
Claims19
A piezoelectric actuator at least comprising:
- a vibrating plate having a projection part to be urged toward a driven member at an end;
- and
- a piezoelectric material stacked on the vibrating plate,
- wherein a Young's modulus EL in the urging direction of the vibrating plate and a Young's modulus ES in an intersection direction crossing the urging direction are different.
1 more element
A motor comprising:
- a vibrating plate having a projection part;
- a piezoelectric material provided on the vibrating plate;
- a driven part driven by vibration of the projection part in contact with the projection part;
- and
- an urging unit that urges the vibrating plate toward the driven part,
- wherein a Young's modulus EL of the vibrating plate in the urging direction and Young's modulus ES of the vibrating plate in a direction crossing the urging direction are different.
3 more elements
A robot comprising:
- a vibrating plate having a projection part;
- a piezoelectric material provided on the vibrating plate;
- a driven part driven by vibration of the projection part in contact with the projection part;
- an urging unit that urges the vibrating plate toward the driven part;
- and
- plural finger parts that grasp an object,
- wherein a value of a Young's modulus EL of the vibrating plate in the urging direction and a value of a Young's modulus ES of the vibrating plate in a direction crossing the urging direction are different in magnitude.
4 more elements
Dependencies are inferred from the claim text.