Process cartridge configured of developing cartridge including electrical contact surface, and drum cartridge including electrical contact surface and lock lever

1. A process cartridge comprising:

a developing cartridge including:

a casing configured to accommodate therein toner;

a developing roller rotatable about a developing axis extending in a first direction; and

a development-side IC chip having a development-side electrical contact surface; and

a drum cartridge including:

a drum frame to which the developing cartridge is detachably attachable;

a photosensitive drum rotatable about a drum axis extending in the first direction;

a drum-side IC chip having a drum-side electrical contact surface; and

a lock lever configured to lock the developing cartridge to the drum frame,

wherein the development-side electrical contact surface and the drum-side electrical contact surface are positioned opposite to the lock lever with respect to the casing in the first direction in a state where the developing cartridge is attached to the drum frame.

2. The process cartridge according to claim 1 ,

wherein the development-side electrical contact surface is positioned at one end portion of the developing cartridge in the first direction,

wherein the drum-side electrical contact surface is positioned at one end portion of the drum frame in the first direction, and

wherein the lock lever is positioned at another end portion of the drum frame in the first direction.

3. The process cartridge according to claim 1 ,

wherein the development-side electrical contact surface is movable relative to the casing.

4. The process cartridge according to claim 1 ,

wherein the drum-side electrical contact surface is movable relative to the drum frame.

5. The process cartridge according to claim 1 ,

wherein the casing has an outer surface at one end portion of the developing cartridge in the first direction, and

wherein the development-side electrical contact surface is positioned away from the outer surface in the first direction.

6. The process cartridge according to claim 1 ,

wherein the casing has an outer surface at one end portion of the developing cartridge in the first direction, and

wherein the developing cartridge further includes a gear cover positioned at the outer surface, the development-side electrical contact surface being attached to the gear cover.

7. The process cartridge according to claim 1 ,

wherein the drum frame includes a first side frame and a second side frame spaced away from the first side frame in the first direction,

wherein the casing is positioned between the first side frame and the second side frame in the first direction in the state where the developing cartridge is attached to the drum frame, and

wherein the development-side electrical contact surface is positioned opposite to the casing with respect to the first side frame in the first direction in the state where the developing cartridge is attached to the drum frame.

8. The process cartridge according to claim 7 ,

wherein the drum-side electrical contact surface is attached to the first side frame.

9. The process cartridge according to claim 8 ,

wherein the lock lever is attached to the second side frame.

10. The process cartridge according to claim 7 ,

wherein the drum-side electrical contact surface is positioned opposite to the casing with respect to the first side frame in the first direction in the state where the developing cartridge is attached to the drum frame.

11. The process cartridge according to claim 1 ,

wherein the lock lever is configured to push up a part of the developing cartridge in a direction away from the drum frame.

12. The process cartridge according to claim 1 ,

wherein, in the state where the developing cartridge is attached to the drum frame, the development-side electrical contact surface is positioned between the developing roller and the drum-side electrical contact surface in a second direction crossing the first direction.

13. The process cartridge according to claim 12 ,

wherein the second direction is perpendicular to the first direction.

14. The process cartridge according to claim 12 ,

wherein the drum cartridge further includes a transfer roller in contact with the photosensitive drum and facing the photosensitive drum in a third direction crossing the first direction and the second direction.

15. The process cartridge according to claim 14 ,

wherein the lock lever includes an operating portion configured to be operated by a user, the operating portion being positioned between the drum-side electrical contact surface and the transfer roller in the third direction.

16. The process cartridge according to claim 15 ,

wherein at least a part of the operating portion is positioned between the development-side electrical contact surface and the transfer roller in the third direction.

17. The process cartridge according to claim 14 ,

wherein the drum cartridge further includes a pressing member configured to press a part of the casing to urge the developing roller toward the photosensitive drum in the state where the developing cartridge is attached to the drum frame, the pressing member being positioned between the drum-side electrical contact surface and the transfer roller in the third direction.

18. The process cartridge according to claim 17 ,

wherein the pressing member includes:

a first pressing member positioned at one end portion of the drum frame in the first direction; and

a second pressing member positioned at another end portion of the drum frame in the first direction.

19. The process cartridge according to claim 14 ,

wherein the development-side electrical contact surface is positioned between the drum-side electrical contact surface and the transfer roller in the third direction in the state where the developing cartridge is attached to the drum frame.

20. The process cartridge according to claim 1 ,

wherein the developing cartridge further includes a developing coupling rotatable about a coupling axis extending in the first direction, and

wherein the developing coupling is positioned opposite to the lock lever with respect to the casing of the developing cartridge in the first direction in the state where the developing cartridge is attached to the drum frame.