Vibration or rotation control device using electroviscous fluid

PURPOSE:To provide a vibration or rotation control device using the electroviscous fluid which is excellent in the responsiveness in the ON/OFF operation of the voltage, prevents the settling of the fine particles, and is excellent in the control effect. CONSTITUTION:A vibration or rotation control device is provided with a pair of or more electrodes 1 which are opposite to each other, the electroviscous fluid 4 is filled between the electrodes 1, and this device controls the vibration or the rotation by making use of the changes in the characteristics of the electroviscous fluid 4 caused by the application of the voltage between the electrodes 1. This device is also provided with a means 5 to drive a part of or the whole of the control device so as to be rotated or reciprocated in the direction different from the input direction of the vibration or the rotation to be controlled.