| 摘要 |
PROBLEM TO BE SOLVED: To provide an active type vibration prevention device capable of increasing generation force.SOLUTION: A liquid chamber 19 is sectioned into a first liquid chamber 20 on the side of a vibration prevention substrate 15 and a second liquid chamber 21 on the side of a diaphragm 17 by an excitation body 40 arranged in the liquid chamber 19. The excitation body 40 is excited in an axial direction with a drive shaft 52 by an actuator 50 arranged on the opposite side of the first liquid chamber 20 so as to hold the excitation body 40 therebetween. Since the excitation body 40 is wholly displaced to the axial direction by excitation from the actuator 50 to change the lengths in the axial direction of the first liquid chamber 20 and second liquid chamber 21, a pressure reception area of the excitation body 40 can be made large. Consequently, generation force can be increased without changing a displacement amount in the axial direction of the excitation body 40.SELECTED DRAWING: Figure 1 |
