Patent ID: 8638022

Claim:
A vibrating element comprising: an element plate, the element plate including: a vibrating portion that performs thickness-shear vibration; a peripheral portion that is integrally formed with the vibrating portion at a periphery of the vibrating portion, that has a thinner thickness than the vibrating portion, and that is located along the periphery that is perpendicular to a displacement direction of the thickness-shear vibration; and a protruding portion that is provided at the peripheral portion; and an excitation electrode that is provided at the vibrating portion, wherein when a side length, which is located along the displacement direction, of the vibrating portion is Mx, when a side length, which is located along the displacement direction, of the excitation electrode is Ex, and when a wavelength of flexure vibrations, which occurs along the displacement direction, of the element plate is λ, the relationship of ( Mx−Ex )/2=λ/2, and Mx/ 2={( A/ 2)+(¼)}λ, where, A is a positive integer, is satisfied, and when a length, which is located along the displacement direction, of the protruding portion is Dx, and when a distance between the vibrating portion and the protruding portion is Sx, the relationship of Dx =(λ/2)× m , and (λ/2)× n− 0.1×λ≦ Sx ≦(λ/2)× n+ 0.1×λ, where m and n are positive integers, is satisfied.