| 摘要 |
PROBLEM TO BE SOLVED: To prevent damaging during cartridge insertion and ejection, and to reduce operation force during the cartridge insertion and ejection. SOLUTION: A shutter opening/closing member 12 is provided, having, in one end, an operated part 16 extended roughly in an opening/closing direction of a shutter 4, rotatable around a rotational fulcrum 17c formed in a middle part, and pressed by a case body 2 to be moved in a direction for moving away from the case body at the time of inserting a cartridge 1, and in the other end, an engaging projection part 15 moved in the direction for contact with the case body at the time of inserting the cartridge 1, and engaged with an engaging hole 7a of the case body.
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