| 摘要 |
A process cartridge detachably mountable to a main assembly of the image forming apparatus, the process cartridge includes an image bearing member; a developing device for developing an electrostatic image formed on the image bearing member with a developer; an image bearing member driving force input portion for receiving a driving force for rotating the image bearing member from an image bearing member driving force output portion from the main assembly; a developing device driving force input portion for receiving a driving force for driving the developing device from a developing device driving force output portion of the main assembly, wherein the image bearing member driving force output portion and the image bearing member driving force input portion are engaged with each other with a play in a mounting and demounting direction of the process cartridge, when the driving force is inputted from the image bearing member driving force output portion to the image bearing member driving force input portion, and wherein when the driving force is inputted from the developing device driving force output portion to the developing device driving force input portion, a part of the process cartridge is urged toward a positioning portion for positioning of the process cartridge relative to the main assembly.
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