| 摘要 |
PROBLEM TO BE SOLVED: To prevent abnormal discharge or a leak at the end parts of a roller without necessitating the dimensional accuracy of a coating layer of a charging roller, and to uniformly charge an image forming area on a photoconductive drum facing the charging roller. SOLUTION: The charging device includes the charging roller and gap maintaining members. The charging roller includes: a conductive roller to which charging voltage is applied; and the coating layer which is a member for covering the outer circumferential surface of the conductive roller, and of which the end is extended by a predetermined length along an extending direction of the conductive roller than end surfaces of the conductive roller. The charging roller charges, in a non-contact manner, the photoconductive drum arranged near the charging roller with the charging voltage applied via the conductive roller. The gap maintaining members are respectively fixed at both ends of the charging roller in positions spaced apart from the ends of the charging roller, and abutted on the photoconductive drum while keeping a predetermined charging gap between the coating layer and the photoconductive drum and rotates together with the charging roller according to the rotation of the photoconductive drum. COPYRIGHT: (C)2011,JPO&INPIT
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