Hard disk drive
AssigneeSamsung Electronics Co., Ltd.
InventorsJung Moo SON, Hong Kwon Lee, Byung-Soo Kim
Life of this patent
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Abstract
An HDD includes a head stack assembly, a voice coil motor, and a retracting pin unit. The retracting pin unit includes a mobile retracting pin generating a retracting force to maintain the actuator arm at a predetermined position by interacting with the magnet when the read/write head is parked, and coupled to the bobbin to be capable of relatively moving with respect to the bobbin toward the magnet when the bobbin is separated from the magnet due to an external shock. A head on disk phenomenon, in which the parking state of the read/write head is removed when an external shock such as a linear shock or a rotary shock, which may be generated as the HDD is installed in a notebook computer, is applied to the HDD, may be reduced.
Claims25
A hard disk drive comprising:
- a head stack assembly including an actuator arm having a read/write head mounted thereon to pivot across a disk around a pivot shaft installed on a base, a pivot shaft holder to rotatably support the pivot shaft and to which the actuator arm is coupled, and a bobbin located at an opposite side of the actuator arm with respect to the pivot shaft holder and having at least one surface on which a voice coil installed;
- a voice coil motor including a magnet to generate an electromagnetic force to pivot the actuator arm by interacting with the voice coil when current flows in the voice coil;
- and
- a retracting pin unit including a mobile retracting pin to generate a retracting force to maintain the actuator arm at a predetermined position by interacting with the magnet when the read/write head is parked, and coupled to the bobbin to be capable of relatively moving with respect to the bobbin toward the magnet when the bobbin is separated from the magnet due to an external shock.
A head stack assembly, comprising:
- an actuator arm to pivot around a shaft;
- and
- a bobbin on a side of the shaft opposite the actuator arm, the bobbin including a retracting pin unit including a pin that moves with respect to the bobbin to maintain a magnetic interaction with a magnet.
Dependencies are inferred from the claim text.