| 摘要 |
PROBLEM TO BE SOLVED: To provide a developing cartridge which can be miniaturized, while improving the relative positioning accuracy between a rotation member and a drive mechanism.SOLUTION: A developing cartridge 19 includes a developing frame 25 having a first side wall 47, a developing gear 77 and a gear mechanism 78 arranged in the outer surface of the first side wall 47, a collar member 72 covering at least a part of the circumferential surface of the developing gear 77, and a gear holder 73 receiving the gear mechanism 78 together with the first side wall 47. Then, each of the collar member 72 and the gear holder 73 is positioned to a positioning part 60 provided in the first side wall 47 in common. |
