PIEZOELECTRIC DRIVE DEVICE, PIEZOELECTRIC MOTOR, AND ROBOT
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United States of America
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N/A
Issued Date -
Dec 30, 2021
app pub date -
Jun 29, 2021
filing date -
Jun 29, 2021
priority date (Note) -
Published
status (Latency Note)
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Abstract
A piezoelectric drive device includes a vibrator having a vibrating portion including a piezoelectric element, and a convex portion placed in the vibrating portion, an urging member including a base, a holding portion holding the vibrator, and a spring portion coupled to the base at one end and coupled to the holding portion at another end and urging the convex portion toward a driven unit, wherein d1>d2 in a natural state in which the vibrator is not urged by the urging member, where a separation distance between the one end and the convex portion along directions of the longitudinal direction is d1 and a separation distance between the other end and the convex portion is d2, and |d1−d2| in an urging state in which the vibrator is urged toward the driven unit by the urging member is smaller than |d1−d2| in the natural state.
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