Patent ID: 9683843
Date: 2017-06-20
CPC Classifications: G01C,H03H,Y10T

Claim:
1. A vibrator element comprising: a base having first and second sides; first and second detection arms that extend from the first side of the base in a first direction, the first and second detection arms being provided parallel to each other in a second direction perpendicular to the first direction, the first and second detection arms swingably oscillating with respect to the first side in first and second vibration modes; and first and second driving arms that extend from the second side of the base in a third direction opposite to the first direction, the first and second driving arms being provided parallel to each other in the second direction, the first and second driving arms swingably oscillating with respect to the second side in the first and second vibration modes, wherein the first and second detection arms are located opposite to the first and second driving arms via the base, respectively, the first and second detection arms and the first and second driving arms oscillate in up and down directions crossing a plane defined by the first, second and third directions, in the first vibration mode, while a driving signal is applied to the first and second driving arms and the vibrator element is rotated around a rotation axis parallel to the third direction, the first and second driving arms move oppositely to one another in the up and down directions and the first and second detection arms move oppositely to one another in the up and down directions, wherein when the first driving arm moves in the up direction: in the second vibration mode, while the driving signal is applied to the first and second driving arms and the vibrator element is rotated around the rotation axis, the first and second driving arms oscillate oppositely to one another in the up and down directions and the first and second detection arms oscillate oppositely to one another in the up and down directions, wherein when the first driving arm moves in the up direction: a ratio r =R