Patent ID: 8110965

Claim:
A piezoelectric device, comprising; a lid plate; a chip plate comprising a tuning-fork type piezoelectric vibrating piece and an outer frame surrounding the tuning-fork type piezoelectric vibrating piece; and a package base plate, wherein the lid plate, chip plate, and package base plate are bonded together as a package containing the piezoelectric vibrating piece inside the package; wherein the tuning-fork type piezoelectric vibrating piece comprises a base having an X-direction width and at least a pair of vibrating arms extending in a Y-direction from the base; the tuning-fork type piezoelectric vibrating piece is coupled to the outer frame by a pair of supporting arms situated outboard of the vibrating arms; the outer frame includes an inner edge surface, extending in the Y-direction, from which at least one base-movement buffer extends in the X-direction toward the base, the base-movement buffer having a height in the X-direction.