| 摘要 |
PURPOSE:To obtain a vibrationproofing characteristic desirable across a wide frequency band without causing the enlargement of a device by allowing the volume in a main fluid chamber and that in an orifice passage to be fluctuated by one electromagnetic actuator. CONSTITUTION:A main fluid chamber 23 and an auxiliary fluid chamber 24 respectively filled with a fluid are partitioned by a partition plate 16 fixed to a frame body 12, and a movable plate 18 disposed on the main fluid chamber 23 side of the partition plate 16. The movable plate 18 is formed to be displaceable in the enlarging/contracting direction of a gap between the movable plate 18 and the partition plate 16 by an electromagnetic actuator formed of an electromagnetic coil 17 and a permanent magnet 20. The main fluid chamber 23 and auxiliary fluid chamber 24 are communicated with each other through an orifice passage formed through the gap between the partition plate 16 and movable plate 18. |
