Piezoelectric vibrator, intrinsic frequency adjusting method of piezoelectric vibrator, piezoelectric actuator and electronic device
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United States of America Patent
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Sep 8, 2009
Grant Date -
Aug 16, 2007
app pub date -
Feb 12, 2007
filing date -
Feb 14, 2006
priority date (Note) -
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Abstract
A piezoelectric vibrator includes: a flat plate piezoelectric element, the piezoelectric vibrator vibrating in a mixed mode of stretching vibration that generates a displacement in a first direction within a plane of the piezoelectric element and a bending vibration that generates a displacement in a second direction orthogonal to the first direction; a vibrating member provided with the piezoelectric element and vibrated by applying voltage on the piezoelectric element; a support member provided on the vibrating member to support the vibrating member in a vibratable manner the support member being provided on an outer edge of the vibrating member at a position adjacent to anti-node other than free end of the bending vibration, the support member including a first support section extending in a direction approximately orthogonal to the first direction and a second support section extending in a direction approximately orthogonal to the direction in which the first support section extends; and a fixing portion provided on the support member to be fixed on an object on which the piezoelectric vibrator is attached.
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