| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid sealing vibration control device which has a simpler configuration, can be manufactured easily, is compact, and shows good vibration control characteristics in a wide region. SOLUTION: A main liquid chamber A formed in a rubber elastic body 1 and an auxiliary liquid chamber B formed in a rubber film 3 are partitioned by a partition wall 2 to communicate them by a first restriction flow passage S1. The partition wall 2 is hollow, a third liquid chamber D is formed in an upper part of an elastic body film 22, a negative pressure chamber C is formed in a lower part thereof, and the third liquid chamber D is communicated with the main liquid chamber A through a second restriction flow passage S2. The elastic body film 22 has a projection part 22b on a lower face at the center and fixes a rising wall 22c at outer periphery on an annular projection part 21f provided on opposing partition wall 2 faces. When negative pressure is introduced into the negative pressure chamber C, the elastic body film 22 is absorbed downward, but a small space 6 is left due to the projection parts 22b, 21f. Therefore, the elastic body film 22 is minutely displaced to absorb the vibration of indistinct sound. |
