Piezoelectric vibrating piece, piezoelectric vibrator, oscillator, electronic apparatus and radio timepiece
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United States of America Patent
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Mar 24, 2015
Grant Date -
Mar 20, 2014
app pub date -
Sep 12, 2013
filing date -
Sep 18, 2012
priority date (Note) -
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Abstract
A piezoelectric vibrating piece, a piezoelectric vibrator, an oscillator, an electronic apparatus and a radio timepiece capable of reducing the size while suppressing reduction of rigidity and having excellent vibration characteristics. The piezoelectric vibrating piece includes a pair of vibrating arm portions in parallel to each other, a base portion integrally fixing base end portions of the pair of vibrating arm portions in a length direction, groove portions on main surfaces of the pair of vibrating arm portions and extending along the length direction, where each of the groove portions includes a first groove portion near a tip portion end of the vibrating arm portions and a second groove portion near the base end portion side of the vibrating arm portions with respect to the first groove portion, and the second groove portion is offset in a −X axis direction with respect to the first groove portion.
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