| 摘要 |
An optomagnetic disk apparatus includes a holder for holding a cartridge which stores an optomagnetic disk therein and which is moved while a cartridge having an openable shutter is held therein. Shutter openers for opening/closing the shutter are movably arranged on the holder. A wire is looped between the shutter openers. Ends of the wire are fixed to the frame. When the holder is moved, the wire is pulled, and the shutter openers are selectively moved to open/close the shutter. The optomagnetic disk apparatus also includes a magnet unit for applying an external magnetic field to the optomagnetic disk when information is erased from or written in the optomagnetic disk. The magnet unit has a flat sectional shape and is rotatable.
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