Patent ID: 7207221

Claim:
A vibration-type gyroscope that detects a rotation angular velocity to be applied to a piezo-electric vibration reed, the piezo-electric vibration reed comprising: a base; a drive section for carrying out a predetermined vibration, the drive section being provided through a supporting beam extended from the base, extending in a first plane, and including a first pair of drive arms and a second pair of drive arms; a detection section for detecting a detection vibration caused by a Coriolis force involved in rotation of the drive section, the detection section extending from the base into the first plane and including a pair of detection arms disposed between the first pair of drive arms and the second pair of drive arms; a first deadweight portion used for characteristic adjustment of the piezo-electric vibration reed, the first deadweight portion being formed in a tip portion of the drive section; and a second deadweight portion used for characteristic adjustment of the piezo-electric vibration reed, the second deadweight portion being formed in a tip portion of the detection section; wherein at least one of the first deadweight portion and the second deadweight portion is formed of a plurality of adjustment portions having different mass per unit area.