| 摘要 |
PROBLEM TO BE SOLVED: To surely incorporate a spring of a shutter member which opens and closes the opening part for a recorder reproducer, without disengagement during operations as to a disk cartridge for an optical disk, etc. SOLUTION: The disk cartridge 10 is constituted, by clamping and fixing an upper shell part 12, a center frame 14, and a lower shell 16 and 1st and 2nd shutter members 34 and 36 are assembled on the lower shell 16. The 2nd shutter member 36 is supported swingingly on a swing shaft 36A, and assembled in the center frame in this state, a 1st shutter spring 60 is engaged with the swing shaft 36 from above, and its one end 60B is locked from a shutter spring lock hole 52 previously provided to a center frame 14 to the 2nd shutter member 36 and set.
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