| 摘要 |
A head lifting mechanism for disc drive units includes a head carriage on which a lower head is mounted, and a head arm which is pivotably supported on the head carriage and on which an upper head is mounted. For the purposes of preventing the upper head from abruptly coming into contact with the disc-shaped recording medium, the head lifting mechanism also includes a damper mechanism. The damper mechanism comprises a slide chamber which is formed in the upper surface of the head arm, a sliding member which is slidable within the slide chamber in a direction perpendicular to the rotation axis of the head arm depending upon movement of the head arm, and a biasing member which biases the head arm downwards. The biasing member is cooperable with the sliding member for allowing the upper head arm to move gently downwards.
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