| 摘要 |
PROBLEM TO BE SOLVED: To prevent a freely elastic key part from being deformed caused by the releasing resistance of nesting. SOLUTION: The film delivering port of a cartridge is provided with a light shielding cover 16 for shielding the inside of the cartridge from light so as to be freely opened and closed. The cover 16 is provided with the key parts 35 and 36 whose cross sections are formed to be C-shaped on both ends of the shaft thereof. Then, when the film delivering port of the cartridge is closed, one key part 35 is locked. The key part 35 is constituted so that the bottom is notched along in a direction orthogonally crossed to a shaft direction by a notched part 37 and one end 35 on the opened side of the C-shaped cross section is freely elastic. Besides, at least the outside circumference of the key part 35 is constituted of a part molded by the fixed and the moving molds for injection molding and a part molded by the nesting mold moved in the direction orthogonally crossed to the fixed and the moving molds at an injection molding time. A parting line 35c accompanied with the coupling of the fixed and the moving molds and the nesting mold is formed along in the rotating direction of the cover 16. |
