Patent ID: 6333912
Filing Date: 2001-12-25
Classification: F16F,G11B

Abstract:
A dynamic balancer for a disk player, comprising:a main body having a circular shape, installed in a rotating body of the disk player;a circular race in said main body, defined by:an inner circumferential wall;a bottom surface extending outward from the bottom of said inner circumferential wall; andan outer circumferential wall contacting said bottom surface, said outer circumferential wall being asymmetric to said inner circumferential wall in a cross-section of the race taken perpendicular to the direction of rotation of the main body;a cover coupled to said main body for covering said circular race; anda plurality of balls disposed in said circular race for distributing mass as the main body rotates, said plurality of balls being free to rotate in said circular race and contacting only said outer circumferential wall due to centrifugal force during rotation of said main body, said balls remaining free to contact said bottom surface when said main body is not rotating.