Patent ID: 8004165

Claim:
A tuning fork oscillating piece, comprising: a pair of oscillating arms extending substantially parallel with each other; a base having the pair of oscillating arms; two drive piezoelectric elements provided on each of the oscillating arms to allow bending oscillation of the oscillating arms by piezoelectric distortion caused by applied charge; two detection piezoelectric elements provided on each of the oscillating arms to convert the piezoelectric distortion caused by the bending oscillation of the oscillating arms into charge and output the charge, wherein the drive piezoelectric elements each have a drive piezoelectric section, wherein the detection piezoelectric elements each have a detection piezoelectric section, wherein the absolute value of the piezoelectric d constant, which is the piezoelectric strain constant, of the drive piezoelectric sections is larger than the absolute value of the piezoelectric d constant of the detection piezoelectric sections, and wherein the absolute value of the piezoelectric g constant, which is the piezoelectric output constant, of the detection piezoelectric sections is larger than the absolute value of the piezoelectric g constant of the drive piezoelectric sections; and wherein each oscillating arm comprises two opposing main surfaces, wherein two of the piezoelectric elements are provided on each main surface of each oscillating arm, wherein one piezoelectric element is provided on each of the inner side and outer side of a main surface center line in an extension direction of each main surface of each oscillating arm.