| 摘要 |
PURPOSE:To simplify the mechanism of a shutter part by providing, to a holder to hold a cartridge, a first lever turnably around its fulcrum on the holder and a second lever also rotatably around it fulcrum on the former lever as an opening/closing and moving means for a shutter provided in the cartridge. CONSTITUTION:The two pieces of shutter levers 31 are provided on the cartridge holder main body 3 turnably around the supporting points at the lower part of the main body 3. A pin 31a on this lever 31 is engaged in a guide groove 3a provided in the holder main body 3, and the lever 31 itself is energized toward the front by a spring (not shown in the figure), therefore, the location shown in the figure is its initial position. At the fulcrum on the lever 31, the lever 32 is provided rotatably, which is energized by a spring 33, therefore, the lever 32 is so mounted that its initial position comes to be the position shown in the figure. A holder stopper 34 is fitted turnably around the protruded part on the inside surface of the holder 3.
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