Patent ID: 7675224
Filing Date: 2010-03-09
Classification: H03H

Abstract:
1. A piezoelectric vibrating reed, comprising: a base formed of a piezoelectric material and having a predetermined length and two main surfaces; a plurality of vibrating arms extended from a side of the base; a long groove formed along a long direction of each of the vibrating arms; a driver electrode disposed in the long groove; a support arm extended in a width direction from a connection portion spaced apart from the side of the base by a predetermined interval and extended outside the vibrating arms in the same direction as the vibrating arms; and a cut portion formed of the piezoelectric material reduced in its width direction at a location between the vibrating arms and the connection portion where the support arms are connected to the base as one body, wherein a through-hole is disposed at a location between the vibrating arms and the connection portion where the support arms are connected to the base as one body; wherein the through-hole includes an axis extending in a direction perpendicular to the longitudinal direction of the vibrating arms, parallel to one of the main surfaces of the vibrating reed, and completely through the entire through-hole, the cut portion includes an axis extending in a direction perpendicular to the longitudinal direction of the vibrating arms and being parallel to one of the main surfaces of the vibrating reed, and the axis of the through-hole is parallel to the axis of the cut portions and extends through the cut portions.