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US 7,990,020 B2Granted
Ultrasonic motor and electronic device using the same
AssigneeSeiko Instruments Inc.
InventorsAkihiro Iino, Makoto Suzuki
Life of this patent
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Abstract
The present invention provides an ultrasonic motor including a wire having a coiled stator at one end thereof, a vibration generating device disposed at another end of the wire, a moving member that is in contact with the stator, a guide member that guides the rotation of the moving member, and an elastic member that covers the periphery of the wire. Accordingly, the driving efficiency of the ultrasonic motor that has a simple structure and that can be easily downsized can be enhanced and the performance stability thereof can be realized.
Claims20
An ultrasonic motor, comprising:
- a coiled stator having one end thereof connected to a wire;
- a vibration generating device that generates vibration waves and propagates them along the wire and the coiled stator;
- a moving member that is in contact with the coiled stator;
- a guide member that guides the rotation of the moving member;
- and
- a vibration absorbing member disposed on the other end of the coiled stator.
3 more elements
An ultrasonic motor, comprising:
- a coiled stator having two ends;
- a wire connected to one end of the coiled stator;
- a vibration generating device that generates vibration waves and propagates them along the wire and the coiled stator to cause the surface of the coiled stator to undergo elliptic motion;
- a movable member in contact with the coiled stator and rotationally driven by the elliptic motion of the surface of the coiled stator;
- and a vibration absorbing member disposed on the other end of the coiled stator and that absorbs vibration waves propagated along the wire to the other end of the coiled stator to prevent the vibration waves from being reflected by the other end of the coiled stator.
2 more elements
Dependencies are inferred from the claim text.