Ultrasonic motor and lens apparatus including the same
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United States of America Patent
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Jan 3, 2017
Grant Date -
Nov 26, 2015
app pub date -
Aug 3, 2015
filing date -
Aug 5, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
Provided is an ultrasonic motor, comprising: a vibrator including a piezoelectric element and a contact surface to be brought into contact with a member to be driven, the vibrator driving the member to be driven by an ultrasonic vibration excited by the piezoelectric element; a holding part configured to hold the vibrator; a pressurization unit configured to apply a bias force for biasing the holding part toward the member to be driven so as to impress the contact surface against the member to be driven; and a fixing unit configured to support the pressurization unit, in which the holding part holds the vibrator on both sides of the contact surface in a driving direction of the member to be driven.
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