| 摘要 |
A head stack assembly (HSA) is provided. The head stack assembly includes a swing arm including a core pivotally coupled to a base member of a hard disk drive (HDD) and at least one arm blade extending from the core in a horizontal direction, a suspension extending from an extreme end of the arm blade, and a head slider mounted on an extreme end of the arm blade for reading and writing data from or to a data storage disk of the HDD. The swing arm further includes a blade extension portion extending from the arm blade toward the core to prevent an interference with the data storage disk of the hard disk drive, and a rigidity weakening portion formed on a side opposite to that where the blade extension portion is formed to attenuate a rigidity difference in a lateral direction of the arm blade, which is caused by the blade extension portion.
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