Patent ID: 8644735

Claim:
A cartridge comprising: a developing roller configured to carry developer thereon; a supply roller in sliding contact with the developing roller to supply the developer to the developing roller; an input rotary body configured to receive a drive force inputted from an image forming device to which the cartridge is detachably mounted; a developing roller drive rotary body configured to transmit the drive force inputted from the input rotary body to the developing roller; and a supply roller drive rotary body configured to transmit the drive force inputted from the input rotary body to the supply roller; wherein at least one of the developing roller drive rotary body and the supply roller drive rotary body includes: a shaft extending in a shaft direction; a first drive input part provided on the shaft and configured to receive the drive force inputted from the input rotary body, the first drive input part having a first rotational transmission diameter; and a second drive input part provided on the shaft at a location different from a location at which the first drive input part is provided and configured to receive the drive force inputted from the input rotary body, the second drive input part having a second rotational transmission diameter different from the first rotational transmission diameter; wherein the input rotary body includes: a first drive output part configured to engage with the first drive input part and transmit the drive force to the first drive input part, the first drive output part having a third rotational transmission diameter and a rotational axis defining an axial direction parallel to the shaft direction; a second drive output part configured to engage with the second drive input part and transmit the drive force to the second drive input part, the second drive output part being coaxial with the first drive output part and positioned at a position different from a position at which the first drive output part in the axial direction, the second drive output part having a fourth rotational transmission diameter different from the third rotational transmission diameter; wherein at least one of the first drive input part and the first drive output part is movable between a first position and a second position, the second drive input part being movable together with movement of the first drive input part, the second drive output part being movable together with movement of the first drive output part, the first drive input part and the first drive output part being engaged with each other when the at least one of the first drive input part and the first drive output part is positioned at the first position, the second drive input part and the second drive output part being engaged with each other when the at least one of the first drive input part and the first drive output part is positioned at the second position.