Patent ID: 8347719
Filing Date: 2013-01-08
Classification: H03H,H04R,Y10T

Abstract:
1. A piezoelectric frame comprising: a tuning-fork type piezoelectric vibrating piece having a pair of vibrating arms extending from a base portion having an upper surface, a lower surface and side surfaces, and respective excitation electrodes formed on the vibrating arms; an outer frame having an upper surface, a lower surface and side surfaces, the outer frame surrounding the tuning-fork type piezoelectric vibrating piece; a pair of supporting arms each supporting arm having an upper surface, a lower surface and side surfaces, the supporting arms extending from the base portion to the outer frame portion and supporting the tuning-fork type piezoelectric vibrating piece; and an acute angle portion formed on at least one of a side surface of the outer frame facing the tuning-fork type piezoelectric vibrating piece, a side surface of the outer frame facing the supporting arms or a side surface of the outer frame facing the base portion, wherein the acute angle portion comprises an acute projection having projection side surfaces meeting at a tip and forming an acute angle when viewed from a direction normal to the upper surface and lower surface of the outer frame, said projection side surfaces formed at an angle relative to the normal direction.