Patent ID: 9059624
Filing Date: 2015-06-16
Classification: F16F,H02K

Abstract:
1. An active dynamic vibration absorber, comprising: a coil part provided inside a housing and wound with a coil; a yoke part that moves with respect to the coil part when current flows in the coil part, and includes an upper yoke, a lower yoke, and a permanent magnet provided between the upper yoke and the lower yoke; springs mounted to the yoke part so as to switch a movement of the yoke part to a vibration; first and second slide protrusions electrically connected to both ends of the coil of the coil part, respectively, and protruding from an exterior circumferential surface of the coil part; a plurality of upper and lower contact protrusions formed in the yoke part to correspond to the first and second slide protrusions, and being selectively in contact with the first and second slide protrusions, respectively; and first and second drive devices electrically connected to the upper and lower contact protrusions, respectively, and generating a relative movement between the coil part and the yoke part by selectively applying current to the respective upper and lower contact protrusions according to a control signal.