Piezo-electric vibration gyroscope

Abstract

The present invention provides a piezo-electric vibration gyroscope comprising: a body of a rectangle plate shape defined by a first size in a length direction and a second size in a width direction; plural driver arms extending from a first side of the body in the length direction and also extending in the same plane as the body; plural detective arms extending from a second side opposite to the first side of the body in an anti-parallel direction to the length direction and also extending in the same plane as the body; plural driver electrodes being provided on the plural driver arms and being applied with an alternating current voltage for causing the plural driver electrodes to show an in-plane vibration of a driving mode in the width direction included in the plane; plural detecting electrodes on at least one of the plural detective arms for detecting a voltage caused by a vertical-to-plane vibration of a detective mode in a vertical direction to the plane, wherein the first size of the body is equal to or larger than the second size of the body for allowing the vertical-to-plane vibration of the detective mode to propagate from the plural driver arms through the body to the plural detective electrodes and for preventing the in-plane vibration of the driving mode from propagating from the plural driver arms through the body to the plural detective electrodes.

Dependencies are inferred from the claim text.