Self-balancing mechanism for disc drivers without vibrations due to specific angular speeds

摘要

A weight member 33 is attached to the rotor 25 to force the center of gravity of the rotor to one side on the rotational axis 28, and the centrifugal force is to offset the misalignment due to the center of gravity biased to one side on the axis of rotation. In order to move the two movable weight members 29, 30 to a suitable position, the stoppers 31, 32 have a fan-shaped area AR1 opposite to the center of gravity so that there is no vibration due to the angular velocity specific to the rotor. Limit the movement of the two movable weight members within.