Method of damping actuator and actuator
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United States of America Patent
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Feb 19, 2008
Grant Date -
Aug 10, 2006
app pub date -
Mar 24, 2006
filing date -
Mar 15, 2004
priority date (Note) -
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Abstract
An actuator includes a piezoelectric element, and a displacement enlargement mechanism which has a movable portion configured to be displaced as the piezoelectric element is displaced and enlarges an amount of displacement of the piezoelectric element. A restraint member is fixed to the movable portion with an elastic or viscoelastic body therebetween and convert vibrational energy of the movable portion into thermal energy based on deformation of the elastic or viscoelastic body, thereby lowering a resonance peak amplitude of the actuator.
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