Patent ID: 8583005

Claim:
A process cartridge detachably mountable to an apparatus main assembly of an image forming apparatus, comprising: an image bearing member unit including an image bearing member rotatably provided; and a developing unit, including a developer carrying member to be urged toward the image bearing member, connected rotationally movably to said image bearing member unit by a connecting portion, wherein the connecting portion includes a shaft provided in one of said image bearing member unit and said developing unit in an end side of said process cartridge with respect to an axial direction of said image bearing member, and includes an engaging portion which is provided in another one of said image bearing member unit and said developing unit in the end side and which is contacted to said shaft, wherein said engaging portion includes a first contact portion contacted to said shaft to permit rotational movement of said developing unit relative to said image bearing member unit, and includes a second contact portion, where said shaft is slidably movable relative thereto, which receives normal reaction B from said shaft in a direction inclined with respect to a direction of normal reaction A received from said shaft by the first contact portion and which moves, when the second contact portion contacts said shaft, said developing unit relative to said image bearing member unit to a contact position of said shaft and the first contact portion, and wherein the normal reaction B or its reaction force is a component of a force for moving said shaft toward the first contact portion relative to the first contact portion.