Developing cartridge provided with cover, and process cartridge having the same

1. A developing cartridge comprising:

a developing roller extending in an extending direction, the developing roller being rotatable about a first axis extending in the extending direction;

a cartridge frame defining an internal space for accommodating a developing agent therein, the cartridge frame having a first side wall and a second side wall separated from the first side wall in the extending direction;

a coupling rotatable about a second axis extending in the extending direction, the coupling being positioned at an opposite side of the first side wall from the internal space, the coupling including a first gear rotatable with the coupling, the first gear being rotatable about the second axis;

a second gear positioned at an opposite side of the second side wall from the internal space;

a first cover covering at least a portion of the first gear, the first cover having an inside surface facing the first side wall and an outside surface being opposite to the inside surface of the first cover in the extending direction, and the first cover having a first engagement portion positioned at the outside surface of the first cover between the first axis of the developing roller and the second axis of the coupling when projected in the extending direction; and

a second cover covering at least a portion of the second gear, the second cover having an inside surface facing the second side wall and an outside surface being opposite to the inside surface of the second cover in the extending direction and the second cover having a second engagement portion positioned at the outside surface of the second cover between the first axis of the developing roller and the second axis of the coupling when projected in the extending direction,

wherein a surface of the coupling is exposed on the outside surface of the first cover.

2. The developing cartridge as claimed in claim 1 , wherein the coupling and the first gear are aligned in the extending direction.

3. The developing cartridge as claimed in claim 1 , wherein the first cover includes a coupling collar extending from the outside surface of the first cover in the extending direction, and

wherein the coupling collar includes the first engagement portion.

4. The developing cartridge as claimed in claim 3 , wherein the developing roller is positioned toward a side of the coupling,

wherein the coupling collar has an end portion, the end portion is positioned toward the side of the coupling, and

wherein the first engagement portion is positioned at the end portion.

5. The developing cartridge as claimed in claim 1 , wherein the first cover includes a coupling collar extending from the outside surface of the first cover in the extending direction,

wherein a surface of the coupling is exposed on an outside surface of the coupling collar of the first cover, and

wherein the coupling collar includes the first engagement portion.

6. The developing cartridge as claimed in claim 5 , wherein the first engagement portion has a first surface extending from the outside surface of the first cover in a perpendicular direction perpendicular to the extending direction.

7. The developing cartridge as claimed in claim 6 , wherein the first surface extends from the outside surface of the first cover toward the first axis of the developing roller.

8. The developing cartridge as claimed in claim 7 , wherein the second engagement portion has a second surface extending in the perpendicular direction, and

wherein at least a portion of the first surface is overlapped with at least a portion of the second surface when projected in the extending direction.

9. The developing cartridge as claimed in claim 5 , wherein the first engagement portion has a first plane extending in a perpendicular direction perpendicular to the extending direction.

10. The developing cartridge as claimed in claim 9 , wherein the first plane extends from the outside surface of the first cover toward the first axis of the developing roller.

11. The developing cartridge as claimed in claim 10 , wherein the second engagement portion has a second plane extending in the perpendicular direction, and

wherein at least a portion of the first plane is overlapped with at least a portion of the second plane when projected in the extending direction.

12. The developing cartridge as claimed in claim 4 , wherein the first engagement portion extends from the end portion toward the first axis of the developing roller.

13. The developing cartridge as claimed in claim 12 , wherein the first engagement portion has a plane extending from the end portion toward the first axis of the developing roller.

14. The developing cartridge as claimed in claim 1 , wherein the first engagement portion has a first surface extending in a perpendicular direction perpendicular to the extending direction, and the second engagement portion has a second surface extending in the perpendicular direction.

15. The developing cartridge as claimed in claim 14 , wherein at least a portion of the first surface is overlapped with at least a portion of the developing roller when projected in the extending direction, and

wherein at least a portion of the second surface is overlapped with at least a portion of the developing roller when projected in the extending direction.

16. The developing cartridge as claimed in claim 14 , wherein at least a portion of the first surface is overlapped with at least a portion of the second surface when projected in the extending direction.

17. A developing cartridge comprising:

a developing roller extending in an extending direction, the developing roller being rotatable about a first axis extending in the extending direction;

a cartridge frame defining an internal space for accommodating a developing agent therein, the cartridge frame having a first side wall and a second side wall separated from the first side wall in the extending direction;

a coupling rotatable about a second axis extending in the extending direction, the coupling being positioned at an opposite side of the first side wall from the internal space, the coupling including a first gear rotatable with the coupling, the first gear being rotatable about the second axis;

a second gear positioned at an opposite side of the second side wall from the internal space;

a first cover covering at least a portion of the first gear, the first cover having an inside surface facing the first side wall and an outside surface being opposite to the inside surface of the first cover in the extending direction, and the first cover having a first engagement portion positioned at the outside surface of the first cover between the first axis of the developing roller and the second axis of the coupling when projected in the extending direction, the first engagement portion being configured to receive a pressing force from a photosensitive member cartridge; and

a second cover covering at least a portion of the second gear, the second cover having an inside surface facing the second side wall and an outside surface being opposite to the inside surface of the second cover in the extending direction, and the second cover having a second engagement portion positioned at the outside surface of the second cover between the first axis of the developing roller and the second axis of the coupling when projected in the extending direction, the second engagement portion being configured to receive a pressing force from the photosensitive member cartridge.

18. The developing cartridge as claimed in claim 17 , wherein the second gear is a detection gear for detecting the developing cartridge.