To provide a piezoelectric vibrator improved in mechanical joint reliability and electrical connecting reliability through the improvement of mechanical resonance acuteness by effectively suppressing the distortion of the piezoelectric vibrator caused by thrashing vibration generated at a detecting side vibrating part and influence upon a driving vibrating part.
A driving side vibrating part 1A composed of vibrating branches 3, 4 with driving electrodes 31-34, 41-44 and an intermediate holding branch 5 with driving input electrodes 51, 52; and a detecting side vibrating part 1B composed of vibrating branches 6, 7 with detecting electrodes 61-64, 71-74, and an intermediate holding branch 8 with detecting output electrodes 81, 82 are integrally disposed with a connecting base part 2 placed in between to form a piezoelectric vibrator 1. The inter-branch pitch DP of two vibrating branches 3, 4 of the driving side vibrating part 1A and the inter-branch pitch SP of the vibrating branches 6, 7 of the detecting side vibrating part 1B are made different from each other, DP<SP to be concrete, and the longitudinal center axes of the respective vibrating branches 3, 4, 6, 7 are displaced.
NISHIMURA MICHIAKI
HIROTA MUTSUAKI
