| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a cartridge that can suppress a toner from leaking from the ends in the axial direction of the peripheral surface of a developing roller to the outside for a long period.SOLUTION: A developing cartridge 1 includes a developing frame 31 that accommodates a toner, a developing roller 2, a layer thickness regulating blade 4 that includes a rubber part 71 and a support plate 70, a side seal 60 that includes a base material 80 and a raising member 81, and a side edge seal 61 that is arranged between the developing roller 2 and the support plate 70. A downstream part 80A of the base material 80 is arranged between the support plate 70 and the developing frame 31, and a downstream end edge 81A of the raising member 81 is arranged on the upstream in the rotation direction R with respect to an upstream end edge 70A of the support plate 70. An upstream end edge 89A of the side edge seal 61 is brought into contact with the raising member 81, and the inward end edges 86A in the right and left direction of the side edge seal 61 are arranged inward in the right and left direction with respect to the end edges 71A in the right and left direction of the rubber part 71.</p> |
