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US 2008/0164783 A1Published application
Driving method and driving device for standing-wave-type ultrasonic actuator
AssigneeOlympus Corporation
InventorJunji OKADA
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AssigneeOlympus Corporation
InventorJunji OKADA
Estimating the term…
The invention provides a driving method and driving device for a standing-wave-type ultrasonic actuator which can prevent falling of and eliminate unstable motion of a driven body during activation, and which can shorten the time for the driven body to stop moving when driving is to be stopped. In the driving method for a standing-wave-type ultrasonic actuator, by generating a longitudinal vibration and a flexural vibration in an ultrasonic vibrator, a substantially elliptical vibration is produced at a friction-contact member of the ultrasonic vibrator, and with a frictional force of the elliptical vibration serving as a propulsive force, the ultrasonic vibrator and a driven body in contact with the ultrasonic vibrator are made to move relative to each other. The longitudinal vibration is excited at activation time, and the flexural vibration is excited thereafter.
A driving method for a standing-wave-type ultrasonic actuator in which, by generating a longitudinal vibration and a flexural vibration in an ultrasonic vibrator, a substantially elliptical vibration is produced at an output end of the ultrasonic vibrator, and with a frictional force of the elliptical vibration serving as a propulsive force, the ultrasonic vibrator and a driven body in contact with the ultrasonic vibrator are made to move relative to each other, the method comprising:
A driving method for a standing-wave-type ultrasonic actuator in which, by generating a longitudinal vibration and a flexural vibration in an ultrasonic vibrator, a substantially elliptical vibration is produced at an output end of the ultrasonic vibrator, and with a frictional force of the elliptical vibration serving as a propulsive force, the ultrasonic vibrator and a driven body in contact with the ultrasonic vibrator are made to move relative to each other, the method comprising:
A driving device for a standing-wave-type ultrasonic actuator in which, by generating a longitudinal vibration and a flexural vibration in an ultrasonic vibrator, a substantially elliptical vibration is produced at an output end of the ultrasonic vibrator, and with a frictional force of the elliptical vibration serving as a propulsive force, the ultrasonic vibrator and a driven body in contact with the ultrasonic vibrator are made to move relative to each other,
A driving device for a standing-wave-type ultrasonic actuator in which, by generating a longitudinal vibration and a flexural vibration in an ultrasonic vibrator, a substantially elliptical vibration is produced at an output end of the ultrasonic vibrator, and with a frictional force of the elliptical vibration serving as a propulsive force, the ultrasonic vibrator and a driven body in contact with the ultrasonic vibrator are made to move relative to each other,
Dependencies are inferred from the claim text.