To use a small-sized vibrator to propagate great exciting force to liquid staying inside a main chamber.
An insulator 5, a main chamber 6 and an auxiliary chamber 7 enclosing non-compressive fluid, a first orifice 2 for communicating between the main chamber 6 and the auxiliary chamber 7, a partition plate 3 for partitioning between the main chamber 6 and the auxiliary chamber 7, an air chamber 8 into which air as compressive fluid is introduced, and a diaphragm 4 for partitioning between the air chamber 8 and the auxiliary chamber 7 are disposed in series between a connecting metal fitting 91 connected to a vibrator 1 and a holder 95 connected to a member on a chassis side or the like. The vibrator 1 is disposed above the partition plate 3 and on a side of the main chamber 6. The vibrator 1 comprises a permanent magnet 17, a center pole 13, a circular exciting coil 11 disposed around the permanent magnet 17, and a bobbin 15 containing the exciting coil 11. A third liquid chamber 63 is disposed above the vibrator 1 independently of the main chamber 6. A second orifice 62 is provided for connecting the main chamber 6 to the third liquid chamber 63.
SUZUKI TATSUO
TSUIKI TETSUYA
GOTO MASANAO
ASANO TETSUO
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