VIBRATION WAVE MOTOR, DRIVE CONTROL SYSTEM, AND OPTICAL APPARATUS
Number of patents in Portfolio can not be more than 2000
United States of America
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Issued Date -
N/A
app pub date -
Jun 3, 2019
filing date -
Jun 3, 2019
priority date (Note) -
Published
status (Latency Note)
Importance
Abstract
A vibration wave motor includes an annular oscillator, and an annular moving member provided so as to be in press contact with the oscillator. The oscillator includes an annular vibrating plate, and an annular piezoelectric element provided on a first surface of the vibrating plate. The vibrating plate is in contact with the moving member via a second surface of the vibrating plate, which is opposite of the first surface. The piezoelectric element has a plurality of drive phase electrodes. When a driving region represents a region of the oscillator in which each drive phase electrode is provided, and a non-driving region represents a remaining region of the oscillator, a contact area ratio S1 between the vibrating plate and the moving member in the non-driving region is less than a contact area ratio S2 between the vibrating plate and the moving member in the driving region.
First Claim
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