ACTIVE VIBRATION CONTROL DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an active vibration control device capable of improving magnetic thrust (exciting force) in comparison with a conventional one by preventing magnetic saturation to restrict a magnetic loss in a magnetic path. SOLUTION: This active vibration control device includes: a body part structured of a base body 12 on a lower side and a housing 14 on an upper side; a movable mechanism 30 elastically supported by a first plate spring member 28a and a second plate spring member 28b fixed in the vertical direction of the body part and installed freely to displace along the axial direction; and a coil part 58 fixed to the body part. The movable mechanism 30 has: a movable shaft body 36 supported along the axial direction; a first yoke 38, a second yoke 42 and a permanent magnet 40 held by the movable shaft body 36 and successively provided along the axial direction of the movable shaft body 36. The permanent magnet 40 is magnetized in the axial direction of the movable shaft body 36 and interposed between the first yoke 38 and the second yoke 42. COPYRIGHT: (C)2011,JPO&INPIT