| 摘要 |
PROBLEM TO BE SOLVED: To provide a developing cartridge capable of efficiently transmitting driving force from an external driving source to a developer carrier while suppressing the breakage of a receiving member.SOLUTION: In a developing cartridge 1 which comprises a developing coupling 41 for transmitting the driving force to a developing roller 2, an engaging surface 54A which receives the driving force is arranged in the radial direction of the developing coupling 41 between a gear 51 which inputs the driving force to the developing roller 2 and a fitting part 53 which fits on a coupling support boss 39 of a developing frame 31. |
