CPC G03G 21/1647 (2013.01) [G03G 21/1676 (2013.01); G03G 21/1821 (2013.01)] | 17 Claims |
1. A developing cartridge attachable to a drum cartridge including a photosensitive drum, the developing cartridge comprising:
a developing roller rotatable about a developing axis extending in a first direction;
a casing configured to accommodate developing agent therein, the casing having one end in a second direction where the developing roller is positioned;
a first cam rotatable relative to the casing about a first axis extending in the first direction between a first position and a second position;
a first gear rotatable about the first axis together with the first cam;
a second cam rotatable relative to the casing about a second axis extending in the first direction between a third position and a fourth position; and
a second gear rotatable about the second axis together with the second cam, the second gear being in contact with the first gear,
wherein, in a state where the developing cartridge is attached to the drum cartridge,
in a case where the first cam is at the first position,
the second cam is at the third position to cause a surface of the developing roller and a surface of the photosensitive drum to contact each other, and
wherein, in the state where the developing cartridge is attached to the drum cartridge,
in a case where the first cam is at the second position,
the second cam is at the fourth position to make contact with a part of the drum cartridge such that the developing cartridge moves relative to the drum cartridge in a direction to separate the surface of the developing roller from the surface of the photosensitive drum in such a manner that a point of contact between the second cam and the part of the drum cartridge functions as a fulcrum.
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