| 摘要 |
A disk drive having a novel actuator assembly. The actuator assembly comprises a voice coil motor assembly, a pivotable actuator arm, and a head gimbal assembly including a read/write head. The voice coil motor assembly is attached at a back end of the actuator arm, and the head gimbal assembly is mounted on the actuator arm on a front end opposite of the back end. The voice coil motor assembly includes a voice coil interposed between two magnets and a top plate and a bottom plate. The voice coil motor assembly is secured to the base of the disk drive by posts. The actuator arm includes the back end, a pivot point and impeding apertures. The impeding apertures include two holes located near the back end of the actuator arm between the pivot point and the voice coil motor assembly and extend entirely through the actuator arm. The actuator arm may also include plugging members. The plugging members are inserted into the impeding apertures and extend entirely through the impeding apertures. The plugging members are of the same circumferential size and configuration as the impeding apertures. In operation, the voice coil motor assembly produces a force which pivots the actuator arm in order to position the read/write heads over individual tracks on the disk. The force produced by the voice coil motor assembly creates a vibration which emanates throughout the actuator arm and propagates toward the read/write heads. The vibration reaches the impeding apertures and is reflected back towards the voice coil motor. The vibration may also be dampened if plugging members are inserted in the impeding apertures.
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