| 摘要 |
PROBLEM TO BE SOLVED: To prevent occurring of a situation where a cartridge cannot be taken out because flaw-preventing protrusions formed on the front surface of a door and protrusions for reducing frictional resistance formed on the rear surface of the door contact with the shutter of the cartridge when the cartridge is inserted erroneously. SOLUTION: The flaw-preventing protrusions 11 and 12 whose heights or heights and widths are different from each other are formed on the front surface of the door 1 provided at an insertion port 10 for inserting the cartridge 4 so that only the higher or higher and wider protrusion 11 may contact with the cartridge when the cartridge 4 is inserted. Furthermore, protrusions whose heights or heights and widths are different from each other are formed also on the rear surface of the door 1 for inserting the cartridge 4 so that only the higher or higher and wider protrusion may contact with the cartridge 4 when the cartridge 4 is ejected. COPYRIGHT: (C)2003,JPO
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