Patent ID: 9584093
Date: 2017-02-28
CPC Classifications: H03H

Claim:
1. A vibrating device comprising: a base portion; and a number 2N of tuning fork arms joined to one end of the base portion and extending in a first direction, N being an integer equal to 2 or larger, wherein the number 2N of tuning fork arms are arranged side by side in a second direction that is perpendicular to the first direction, each of the tuning fork arms configured to flexurally vibrate in a third direction that is perpendicular to the second direction and the first direction, phases of flexural vibrations of the number N of tuning fork arms positioned at a first side of an imaginary line, which passes a center of a region in the second direction where the number 2N of tuning fork arms are disposed and which extends in the first direction, are symmetric to phases of the flexural vibrations of the number N of tuning fork arms positioned at a second side of the imaginary line opposite to the first side, the number N is two, and a first set of two tuning fork arms positioned at the first side of the imaginary line and a second set of two tuning fork arms positioned at the second side of the imaginary line have flexural vibrations in opposite phases, and the first set of two tuning fork arms have piezoelectric layers polarized in an opposite direction to piezoelectric layers of the second set of two tuning fork arms.