Patent ID: 8150296

Claim:
A color electrophotographic image forming apparatus, comprising: an electrophotographic photosensitive drum; a motor; a rotatable rotary member to which a plurality of developing cartridges are detachably mountable, each developing cartridge including: a developer containing portion for containing developer; and a developing roller for developing an electrostatic latent image formed on the electrophotographic photosensitive drum by using the developer contained in the developer containing portion; rotative force transmitting means for transmitting a rotative force to the rotary member, the rotative force including a motorized rotative force from the motor and a manual rotative force; and a manually-operated unit, which is movable between an operative position in which the manually-operated unit is connected to the rotative force transmitting means to transmit the manual rotative force to the rotative force transmitting means and a retracted position in which the manually-operated unit is spaced apart from the rotative force transmitting means, wherein in a state in which the manually-operated unit is moved from the retracted position to the operative position by manual operation, the manually-operated unit transmits the manual rotative force to the rotative force transmitting means by the manual operation to rotate the rotary member, whereby the rotary member is rotatable by the manual operation, and wherein the manually-operated unit is configured to move from the operative position to the retracted position after the end of the manual operation.