Disk drive apparatus

Abstract

To provide a disk drive apparatus that suppresses undesirable vibrations due to the unbalance of a loaded disk and achieves high-speed data transfer, the disk drive apparatus of the present invention comprises a hollow ring member ( 23 ) that contains therein a plurality of spherical bodies ( 24 ) or a liquid ( 26 ) to form a balancer or a balancer, wherein the balancer is formed so as to be rotatable in integral fashion with a disk, thereby suppressing the vibrations generated when an unbalanced disk is rotated at high speed.

We claim:  
     
         1 . A motor in combination with an optical disk drive apparatus for recording or reproducing an interchangeable optical disk, comprising: 
 a balancer mounted rotatably with a rotor, and having a hollow ring member containing therein a rotatable balancing member, and having a center axis positioned substantially concentrically with a rotational center axis of said motor,    wherein said balancer reduces vibration due to imbalance of said interchangeable optical disk loaded by a user, and    said interchangeable optical disk is driven for rotation at a frequency higher than the primary resonance frequency of wobbling vibrations of said interchangeable optical disk loaded by the user.    
     
     
         2 . A motor in combination with an optical disk drive apparatus for recording or reproducing an interchangeable optical disk, 
 wherein a balancer having a hollow ring member containing therein a balancing member and having a center axis positioned substantially concentrically with a rotational center axis of said motor is mounted in integral fashion with a spindle shaft,    wherein said balancer reduces vibration due to imbalance of said interchangeable optical disk loaded by a user, and    said interchangeable optical disk is driven for rotation at a frequency higher than the primary resonance frequency of wobbling vibrations of said interchangeable optical disk loaded by the user.