| 摘要 |
PROBLEM TO BE SOLVED: To obtain a simple, miniature and rigid disk type cartridge for a holding body by preparing two parts of a cover and a bottom part, forming the cover and the bottom part into nearly circular parts which supplement each other and mutually executing a limited relative movement. SOLUTION: A bottom part is rotated clockwise during a relative movement between the bottom part and a cover 2. When the cover 2 is in a stationary state, a shutter 10 and a leg part are transferred together with the bottom part up to a position where the leg part is locked with a side surface 23 positioning in the left side of a partitioning part provided in the cover 2. Next, an opening part 8 is further transferred up to a position beyond the shutter 10 and a socket 12 with the bottom part by its rotation. Consequently, since the shutter 10 transferred with the socket 12 is turned in the reverse direction around the leg part, the opening part 8 is opened and access to a disk 4 becomes possible. This movement is stopped by abutting a vertical wall 32 on the leg part already locked with the side surface 23.
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