Vibrating reed, vibrator, oscillator, and electronic device

Abstract

A vibrating reed includes: a base; and a vibrating arm which is extended from one end portion of the base, the vibrating arm having an arm portion which is disposed on the base side, a weight portion which is disposed on a tip side of the arm portion and has a larger width than the arm portion, main surfaces which are respectively disposed on front and back sides of the vibrating arm, side surfaces each of which extends in a longitudinal direction of the vibrating arm to connect the main surfaces on the front and back sides and which are formed so as to face each other, a first groove portion which is a bottomed groove formed at least one of the main surfaces along the longitudinal direction of the vibrating arm, a first excitation electrode which is formed on groove side surfaces each connecting a bottom of the first groove portion with the one main surface, a second excitation electrode which is formed on the both side surfaces, and a projection-in-groove which is disposed on the tip side of a bisector bisecting the vibrating arm in the longitudinal direction and is formed so as to be along the groove side surface with a part of the first groove portion interposed between the projection-in-groove and the groove side surface.

Dependencies are inferred from the claim text.