| 摘要 |
PROBLEM TO BE SOLVED: To obtain a disk cartridge adapted to prevent the easy disengagement of a guide projection and a cam hole. SOLUTION: The under surface of a disk section 70 of an inner rotor 20 is provided with a pair of depressed circular arc grooves 102 centering on the axial part of the inner rotor 20 opposingly to the tip of a cam projection 56 penetrated through a cam groove 66 formed at a shutter member 18 within a rotationally moving range of the inner rotor 20 accompanying the opening and closing of the shutter member 18. Thereby, the cam projection 56 is made longer and the cam projection 56 is completely penetrated into the cam groove 66 (the tip of the cam projection 56 is projected from the rear face 18A of the shutter member 18). Consequently, the depth of the engagement between the cam projection 56 and the cam groove 66 is increased, and the engaging state of the cam groove 66 and the cam projection 56 is made tighter. As a result, the easy disengagement of the cam projection 56 and the cam groove 66 is prevented. COPYRIGHT: (C)2005,JPO&NCIPI
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