Patent ID: 6243351
Filing Date: 2001-06-05
Classification: F16F,G11B

Abstract:
An automatic balancing apparatus for an optical disk drive device comprising:(a) a support member coupled to a drive motor spindle;(b) a circular tray coaxially disposed on said support member to coaxially engage said drive motor spindle, said circular tray having a plurality of upwardly open compartments concentrically formed thereon, at least one of said compartments describing an upper recess defining an upper annular space and a portion of said compartments defining a plurality of annular channels, each said annular channel containing a plurality of weight balls substantially in freely displaceable manner therein;(c) a magnetic member received in said upper annular space for releasably capturing said circular tray against said support member; and,(d) a cover releasably secured to said circular tray to detachably cover at least a portion of said upwardly open circular tray compartments, including said annular channels;whereby said weight balls freely disperse within said respective annular channels thereof responsive to the rotation of said circular tray for balancing the rotational drive of the optical disk drive device.