| 摘要 |
PROBLEM TO BE SOLVED: To provide a developing cartridge that can smoothly receive driving force from the outside.SOLUTION: In a developing cartridge 1 that accommodates a toner and includes a developing roller 2 and a developing coupling 41 receiving driving force from an apparatus body 12, the developing coupling 41 is provided with a first cylindrical part 50 having a gear part 51, a second cylindrical part 53 arranged inside the first cylindrical part 50 at an interval, and an engaging part 54 arranged across the interval between the first cylindrical part 50 and the second cylindrical part 53, and the space between the first cylindrical part 50 and the second cylindrical part 53 is made continued to the inside of the engaging part 54 to close a left end of the engaging part 54. |
