Patent ID: 7367037
Filing Date: 2008-04-29
Classification: F16F,G11B,Y10T

Abstract:
1. A self-compensating dynamic balancer apparatus for a disk player which records and reproduces information from a disk installed on said disk player, said apparatus comprising: a self-compensating dynamic balancer comprising: a non-magnetic hollow tube; and a mobile unit which comprises at least one rigid body and is disposed within said non-magnetic hollow tube, wherein said self-compensation dynamic balancer is locatable coaxial with a rotation axis about which said disk is rotated by rotational components of said disk player, wherein said self-compensation dynamic balancer rotates in use with at least one of rotational components, wherein said mobile unit is arranged to be freely movable within said non-magnetic hollow tube by centrifugal force generated by rotation of said disk such that the center of gravity of said self-compensating dynamic balancer moves to be located opposite to the center of gravity of said disk with respect to said rotation axis when an angular frequency of the disk is greater than a natural frequency of a deck plate of the disk player, wherein the natural frequency of the deck plate is determined by an elastic modulus of buffering members of the disk player and mass of the deck plate and other elements to be installed on the deck plate, and represents a rate of vibration in a horizontal direction, and wherein the self-compensating dynamic balancer is mounted to at least one among members which are rotated by the rotational force provided by a spindle motor, and the center of gravity of said self-compensating dynamic balancer is located opposite to that of said disk with respect to a rotational shaft of said spindle motor by a centrifugal force generated during rotation of said disk, thereby to compensate for vibrations due to an eccentric center of gravity of said disk.