Patent ID: 8028579

Claim:
A vibration body for angular speed sensor, comprising: a vibrator having vibration pieces, a supporting part for supporting the vibration pieces, and a mounting substrate for mounting the vibrator, wherein the mounting substrate comprises a seat part for fixing the supporting part and supporting the vibrator and a base part, the seat part has a level difference representing a predetermined height from the base part, said predetermined height is set larger than an oscillation width of the vibration pieces, said seat part also comprises, on the side of the vibrator pieces, an edge portion having a shape of a curved line, an end portion of supporting part of the vibration coincides with the edge portion thereof, each normal line in a direction perpendicular to a tangential direction of the curved line at each position on the edge portion determines a mounting angle for mounting the vibrator and has an angle in the same direction as a reference direction defined in the mounting substrate or in a direction at least one being different therefrom, and the overall area of the supporting part covers the seat part so that a positional relationship between the seat part to which the vibrator is fixed and the supporting part of the vibrator being kept constant.