| 摘要 |
PROBLEM TO BE SOLVED: To effectively ensure (1) the length of a second orifice, (2) an arranging space for a movable plate in a fluid flow passage, and to effectively improve (3) a flexible film for opening/closing an opening portion of the second orifice passage, in a liquid sealing vibration isolating device of orifice switching type comprising a low-frequency first orifice passage, a medium frequency second orifice passage, and a high-frequency fluid flow passage, and pressing the flexible film with an actuator to open/close the second orifice passage. SOLUTION: A second orifice passage 62 is formed so as to extend an outer peripheral part of a partition member 34 in a circumferential direction, and one end portion of the second orifice passage 62 is extended inward in the diametrical direction and opened to a balance chamber 48 at a center part of the partition member 34. At the center part of the partition member 34, a fluid flow passage 80 arranged with a movable plate 82 is formed so as to axially superimpose with an extending communication passage 70 in the circumferentially inward direction of the second orifice passage 62. |
