PURPOSE: To prevent performance change and damage caused by the change in environment temperature.
CONSTITUTION: A pendulum 21, a frame body 22 and a hinge 23 for linking these parts are formed of the same material as a unitary body. One end of a vibrator 15 is fixed to the pendulum 21. The other end is fixed to the tip of the vertical part of the part T of a supporting body 26, which is formed of a material, whose thermal expansion coefficient is approximately equal to the vibrator 15, in a T shape. Both ends of the horizontal part of the part T of the supporting body 26 are fixed to the frame body 22 corresponding to one end of the vibrator 15. Spring parts 33 and 34 are formed between both fixed ends and the vertical part of the part T. Even if temperature is changed, thermal stress hardly occurs in the longitudinal direction of the vibrator 15. Thermal stress in the direction of the width is absorbed with the spring parts 33 and 34.
ITO HIROHITO
SHIRATORI MASAYUKI
