| 摘要 |
PROBLEM TO BE SOLVED: To restrain a current-carrying quantity to a coil by respectively arranging a pair of magnetic force acting members on both sides sandwiching an electromagnet through a gap space so as to be displaceable, and constituting a movable member by a pair of these magnetic force acting members. SOLUTION: An electromagnetically driving fluid pressure adjusting device 60 is housed in a pressure receiving chamber 48 in which a part of a wall part is composed of a main body rubber elastic body 16 being a movable member, and in this fluid pressure adjusting device 60, a first magnetic force acting plate 64 and a second magnetic force acting plate 66 are arranged on both sides sandwiching a single electromagnet 62. An internal pressure variation is caused to generate in the pressure receiving chamber 48 by displacing these first and second magnetic force acting plates 64 and 66 by current-carrying to a coil 70 of the electromagnet 62. Therefore, large excitation force can be exerted on the main body rubber elastic body 16 while restraining a current- carrying quantity to the coil 70 of the electromagnet 62, and a vibration proofing effect of the pressure receiving chamber 48 can be exhibited. |
