| 摘要 |
PROBLEM TO BE SOLVED: To prevent the leakage of toner in a developing case caused by the fall, etc., and also, to eliminate a trouble of peeling off a tape in use. SOLUTION: A blade holder 42, a blade 17 and an reinforcing plate 43 are laminated and mounted on the blade mount surface 44 of the developing case 13, and a gap between the blade 17 and the developing case 13 is sealed by a 1st sealing member 577, and a gap between the upper edge of the blade holder 42 and the developing case 13 is sealed by a 2nd sealing member 59, and a gap between the upper edge of the reinforcing plate 43 and the blade holder 42 is sealed by a 3rd sealing member 65. By having such the constitution, the toner lying in the developing case 13 is prevented from leaking out through the rear side of the blade holder 42 and the gap between the blade 17 and the blade holder 42, even in the case the developing roller 15 and the blade 17 move to and fro due to the abnormal impact on the developing case 13. |
