| 摘要 |
PROBLEM TO BE SOLVED: To provide a drum cartridge, a process cartridge, and an image forming apparatus with which the surroundings of a developing roller can be smoothly cooled.SOLUTION: A drum cartridge 2 includes a second opening 58 and a first concavo-convex part 61. The second opening 58 is arranged at the center in the fore-and-aft direction of a bottom wall 56 of the drum cartridge 2. The first concavo-convex part 61 is arranged on the front side with respect to the second opening 58. The first concavo-convex part 61 includes a plurality of concave parts 63 and a plurality of convex parts 64 facing the second opening 58. Thus, the plurality of concave parts 63 of the first concavo-convex part 61 can increase the area of the second opening 58, and thereby the amount of air passing through the second opening 58 can be increased and the amount of air directed to a developing roller 12 can be increased.SELECTED DRAWING: Figure 6 |
