Patent ID: 9020395
Filing Date: 2015-04-28
Classification: G03G

Abstract:
1. A developing cartridge comprising: a developing roller having a rotational axis, the developing roller including: a developing roller main body having a first end and a second end opposite to the first end; a first protrusion protruding outwardly from the first end of the developing roller main body along the rotational axis, a second protrusion protruding outwardly from the second end of the developing roller main body along the rotational axis, and a developing gear having a D-shaped hole, wherein the first protrusion has a circular peripheral surface having no stepped circumferential surface; and wherein the second protrusion includes: a small diameter part having a circular peripheral surface having a diameter smaller than a diameter of the first protrusion; and a D-cut part disposed between the developing roller main body and the small diameter part along the rotational axis, at least a portion of the D-cut part being inserted into the D-shaped hole, a gear cover covering at least a portion of the developing gear, the gear cover having an outwardly protruding insertion part through which the small diameter part of the second protrusion is inserted, wherein the insertion part protrudes outwardly along the rotational axis.