| 摘要 |
PROBLEM TO BE SOLVED: To substantially eliminate leakage of magnetic flux from a generator permanent magnet to an outer part in a 3.5" floppy disk-type diskette, which adjacently has a permanent magnet-type generator and a space in which a memory card is inserted. SOLUTION: A diskette 1 adjoining has a generator 2, having a rotor permanent magnet and a space, into which a memory card is inserted. An opening hole 121, where a rotor is positioned at the rear plate 12 of the generator-side of a diskette case, is made in the center. A magnetic shielding plate 241, which is substantially similar to the outer diameter of the permanent magnet or is larger than it, is bonded to the upper end face of a rotor permanent magnet 212. The heights of the magnetic shielding plate 241 and the rear plate 12 are made to be almost similar. An excess space is eliminated between the generator and the diskette case, the diskette can be made thin, and the leakage of magnetic flux to an outer part can substantially be eliminated with such a constitution.
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