| 摘要 |
PROBLEM TO BE SOLVED: To provide a shroud structure capable of reducing the power consumption by reducing the air resistance while taking the assemblability into consideration and further capable of preventing dust from entering into the side of a magnetic disk from the outside of the shroud. SOLUTION: In this magnetic disk device provided with a base 504 for fixedly supporting a spindle motor to rotate magnetic disks 501 and a voice coil motor, the cylindrical shroud 503 arranged on the base so as to cover the circumference of the magnetic disk other than the rocking range of an actuator, and a cover 611 constituting the enclosure by covering the base 504 so as to hermetically seal the magnetic disk or the spindle motor, the air resistance is reduced and also the dust is prevented from entering into the side of the magnetic disk from the outside of the shroud in such a manner that the shroud includes the upper surface projected toward the cover with a gap then the space between the upper surface of this shroud and the base surface at the position faced each other to the upper surface of the shroud is flattened with the accuracy of <=0.2 mm.
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