초록 ▼

By a controller 18 which receives signal input from a first sensor 16 for detecting the vibratory state of an object O to be isolated from vibration and from a second sensor 17 for detecting the vibratory state of an intermediate mass element 13, a signal is outputted to a power input portion 12 of

By a controller 18 which receives signal input from a first sensor 16 for detecting the vibratory state of an object O to be isolated from vibration and from a second sensor 17 for detecting the vibratory state of an intermediate mass element 13, a signal is outputted to a power input portion 12 of a piezoelectric element 11 to cause a voltage variation such that the intermediate mass element 13 vibrates to cancel out the vibrations of the object O in an acting direction.

대표청구항 ▼

[What is claimed is:] [1.]an intermediate mass element placed in a space between an object to be isolated from vibration and a supporting surface;a first elastic member having one end fixed to the intermediate mass element and the other end fixed to the object and exerting spring action on the inter

[What is claimed is:] [1.]an intermediate mass element placed in a space between an object to be isolated from vibration and a supporting surface;a first elastic member having one end fixed to the intermediate mass element and the other end fixed to the object and exerting spring action on the intermediate mass element and the object;a solid element placed between the intermediate mass element and the supporting surface and, with respect to an acting direction along the length thereof that varies with a variation in voltage or magnetic field generated in the solid element, having one end fixed to the supporting surface or having the other end fixed to the intermediate mass element;a second elastic member placed between the intermediate mass element and the solid element or between the solid element and the supporting surface and exerting spring action on the intermediate mass element, directly or indirectly through the solid element;a power input portion connected to, for causing the variation in voltage or magnetic filed in, the solid element;a first sensor, fixed relative to the supporting surface, for detecting a vibratory state of the object with respect to the acting direction;a second sensor, fixed relative to the supporting surface, for detecting a vibratory state of the intermediate mass element with respect to the acting direction; anda controller connected to, for receiving signal input from, the first sensor and the second sensor, and for outputting to the power input portion a signal which causes the variation in voltage or magnetic field such that the intermediate mass element vibrates to cancel out the vibrations of the object in the acting direction.