| 摘要 |
PURPOSE:To provide a fluid sealed type vibration proof device which is equipped with a drive means that can apply large excitation force stably to a vibration plate for controlling the internal pressure of a fluid chamber. CONSTITUTION:A magnetic passage having an annular gap portion 62 is formed by connecting the 1st and 2nd yokes 54, 56 to a permanent magnet 50 arranged behind a vibration plate 27 constituting part of the wall portion of a fluid chamber 32. Meanwhile, a movable coil 68 connected to the vibration plate 27 is provided in the gap portion 62, and by conducting electrification to the movable coil 68, excitation force is applied to the vibration plate 27, and at the same time a magnetic fluid is interposed at the gap portion 62 where the movable coil 68 is provided. |
