CHARGING DEVICE, IMAGING UNIT, AND IMAGE FORMING APPARATUS

• Main Authors: MATSUMOTO KOHEI, KUNII HIROYUKI, NAKAYAMA MASAYOSHI, KAMIHARA KAZUAKI, TERAO MASAICHI, HIGA TAKUMA, SUKESAKO MASAKI, KATO MASAHIRO, AIZAWA YUICHI, SUGIYAMA TOSHIHIRO
• Format: Patent
• Language: English; Japanese
• Published: 23.06.2016
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

PROBLEM TO BE SOLVED: To provide a charging device that can suppress a ghost phenomenon while suppressing a deterioration of a photoreceptor drum.SOLUTION: There is provided a charging device 30 comprising: discharge wires 312 and 313 (first charging members); a discharge wire 314 (second charging member) that is disposed to be adjacent to the charging wire 313 on the upstream side of the direction of rotation of a photoreceptor drum 1; an electricity eliminating lamp 32; and a light shielding member 33 that is provided with an opening 331 passing a part of irradiation light from the electricity eliminating lamp 32 therethrough and shields light other than the irradiation light, where the light shielding member 33 is configured such that, at least during charging by the discharge wire 314, an irradiation area Ar1 located between a first portion 313a facing the discharge wire 313 and a second portion 314a facing the discharge wire 314 on a peripheral surface of the photoreceptor drum 1, the area excluding the first portion and second portion, is irradiated with the part of light passed through the opening 331.SELECTED DRAWING: Figure 4 【課題】感光体ドラムの劣化を抑えつつゴースト現象を抑制することができる帯電装置を提供する。【解決手段】帯電装置３０において、放電ワイヤ３１２，３１３（第１帯電部材）と、感光体ドラム１の回転方向Ｄ１の上流側に放電ワイヤ３１３と隣接するように配置される放電ワイヤ３１４（第２帯電部材）と、除電ランプ３２と、除電ランプ３２の照射光の一部の光を通す開口３３１が設けられ他の光を遮る遮光部材３３と、を備え、遮光部材３３は、少なくとも放電ワイヤ３１４による帯電中は、感光体ドラム１の周面における放電ワイヤ３１３が対面する第１箇所３１３ａと放電ワイヤ３１４が対面する第２箇所３１４ａとの間で、且つ第１箇所及び第２箇所を避けた照射領域Ａｒ１へと、開口３３１を通った前記一部の光が照射されるように構成されていることを特徴とする。【選択図】図４