| 摘要 |
PROBLEM TO BE SOLVED: To easily turn a process cartridge to a closing position by setting the position of a stopping means, so that the process cartridge occupies the position except the restrained position of the process cartridge by a lower main body. SOLUTION: A pin path 33 and a notch 32 are formed respectively to form an angleθexcept 180 deg. by the moving direction S1 of the pin 7 of the process cartridge 4 when the pin 7 passes through the pin path 33 and the moving direction S2 of the pin 7 when it passes through the notch 32, after the pin 7 is advanced to the notch 32 or before the pin 7 leaves the notch 32. Thus, when the pin 7 is inserted into the pin path 33 and the cartridge 4 is pushed, at the time of installing it in the lower main body 2, the pin 7 is fitted into a hole 31, but not the notch 32. The pin 7 is fitted into the hole 31, so that the pin 7 occupies the position except the engagement position with the notch 32. Therefore, the cartridge 4 can be tuned to the closing position, as it is.
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