| 摘要 |
To provide a removable disk drive which can discharge static electricity with which a recording disk is charged, which does not produce noise and metal powder when a spindle motor shaft is rotated, and the electric power consumption of which is small. A removable disk drive 10 is provided with an electrostatic brush 5 disposed between a spindle motor shaft 1 and a housing 4 and formed of a conductive material. When operation of inserting a recording disk 6 in the removable disk drive 10 is on the way, the electrostatic brush 5 is in contact with the spindle motor shaft 1 and the housing 4 to discharge static electricity with which the recording disk 6 is charged to the housing 4 through the spindle motor shaft 1 and the electrostatic brush 5. After the recording disk 6 is completely inserted in the removable disk drive 10, the electrostatic brush 5 is out of contact with the spindle motor shaft 1 to prevent noise and metal powder from being produced when the spindle motor shaft 1 is rotated.
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