| 摘要 |
PROBLEM TO BE SOLVED: To provide a recording disk cartridge in a simplified structure, which prevents contamination to a recording disk medium to the utmost, and has high stiffness, and excellent assembling performance and productivity. SOLUTION: A recording disk cartridge has: a base frame 10; a lower plate 20 configuring a lower wall of a cartridge case C and having a chucking center hole C3 formed therein; an upper plate 30; a rotary shutter 40 for opening and closing a side opening; and a swing shutter 50 that has a bearing 51 fit onto a spindle 21, engages with the rotary shutter 40, and opens and closes the chucking center hole C3 by swinging depending on rotational operation of the rotary shutter 40, wherein a lock spring 70 for locking or unlocking the rotary shutter 40, which is formed by forming a sheet of plate, has a bearing part 71, lock leg part 72, unlock leg part 73, and spring leg part 74. COPYRIGHT: (C)2007,JPO&INPIT
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