| 摘要 |
A first connecting member is connected to a second connecting member by an elastic body member. A fluid chamber which is formed inside the first connecting member, the second connecting member and the elastic body member is divided into a main fluid chamber 17 and a sub-fluid chamber 18 by a partition member 15. An idle orifice 20 and a damping orifice 21 communicate with both chambers. In a part of a side wall member 9 which forms the main fluid chamber 17 is formed a round hole 10 which is covered by a part of the elastic body member to form a horizontally movable membrane 11. A circular wall 44 is integrally formed with the partition member 15 to face the horizontal movable membrane 11 at predetermined intervals. Resonance of the horizontal membrane 11 generated as a result of fluctuations of internal pressure in the main fluid chamber is controlled by the circular wall 44.
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