| 摘要 |
A clamp device for an optical disc is disclosed. The clamp device includes a cover frame having a receiving space and an opening at its bottom surface; a holder chuck which is received at its upper part in the receiving space of the cover frame and rotatably and movably supported thereby, the holder chuck being provided at its lower surface a downward projection and provided at its lower surface with a center ring seating recess tapered upward, the center ring seating recess being centrally provided with a center post; a spring disposed between the cover frame and the holder chuck to bias the holder chuck downward; and a plate chuck coupled to a lower surface of the holder chuck, which is centrally formed with a through hole, through which the projection of the holder chuck passes. Upon being subjected to external shocks, the center of the holder chuck is separated from a center recess and then restored to an initial normal position, so that transmission of external shocks to the turntable and a driving motor is interrupted, thereby improving reliability in writing and/or reading data.
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