Patent ID: 8923731

Claim:
A developing cartridge detachably mountable to a development rotary member of an electrophotographic image forming apparatus, the electrophotographic image forming apparatus including a rotatable main assembly engaging portion, a rotatable development rotary member, and a function member, said developing cartridge comprising: a developing roller configured to develop a latent image formed on an image bearing member; a developer accommodating portion configured to accommodate a developer for developing the latent image using said developing roller; a coupling member configured to transmit a rotational force from the main assembly engaging portion to said developing roller, said coupling member being engageable with and disengageable from the main assembly engaging portion with rotation of the development rotary member, said coupling member being movable among a rotational force transmitting angular position for transmitting the rotational force to said developing roller through the engagement with the main assembly engaging portion, a pre-engagement angular position in which a rotational axis of said coupling member is inclined relative to that in the rotational force transmitting angular position to be brought into engagement with the main assembly engaging portion and a disengaging angular position for disengaging from the main assembly engaging portion; and an inclination regulating member movable between a regulating position for positioning said coupling member to the pre-engagement angular position and a retracted position retracted from the regulating position, said inclination regulating member being movable from the retracted position to the regulating position by being abutted by the function member with rotation of the development rotary member.