CARTRIDGE AND IMAGE FORMING DEVICE

摘要

The invention is made to provide a compact cartridge and an image forming device having the cartridge mounted therein. In a developing cartridge 19 provided are a developing-cartridge frame 25 for accommodating toner; a detectable gear 96 configured to be detected by an actuator 141 provided in a main casing 2, and an idle gear 94 for transmitting a drive force from the main casing 2 to the detectable gear 96. A passive part 110 configured to receive the drive force from the idle gear 94 and a second contact part 114 configured to be detected by the actuator 141 are provided on the detectable gear 96 such that the passive part 110 and second contact part 114 are disposed at the same position as each other in the left-right direction.