| 摘要 |
PROBLEM TO BE SOLVED: To achieve compact size, without narrowing the width of a pair of arms made at a forked crystal oscillating piece. SOLUTION: In a tuning fork crystal oscillating piece 21 which is equipped with a base 22 and a pair of arms 23a and 23b, extending from this base 22, the spring constant is suppressed lower, by providing a plurality of through-holes 27a and 27b in the longitudinal direction, from the base end 22 of each arm 23a and 23b described above. Moreover, the electric field efficiency is raised, and equivalent resistance is suppressed low, by forming oscillating electrodes at the inner flanks of the above through holes 27a and 27b to coincide with the direction of polarization of a quartz crystal.
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