IMAGE FORMING APPARATUS

• Main Authors: NISHIOKA MUTSUHIRO, MORISHITA HIROKI
• Format: Patent
• Language: English; Japanese
• Published: 25.05.2017
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

PROBLEM TO BE SOLVED: To prevent an image defect by suppressing the secular deformation of an image carrier and an electrifying member, thereby improving the electrification performance of the image carrier and to improve the workability of the setup of an image forming apparatus.SOLUTION: The image forming apparatus includes a unit 20 which includes an electrifying member for electrifying an image carrier 8 and a bearing 34 for supporting the electrifying member and an apparatus body 2 to which the unit 20 is attached. The bearing 34 is provided to be switchable between a contact attitude for bringing the electrifying member into contact with the image carrier 8 and a separation attitude for separating the electrifying member from the image carrier 8. In a state before the unit 20 is attached to the apparatus body 2, the bearing 34 is held in the separation attitude. A pressing part 93 provided in the apparatus body 2 presses the bearing 34, according to the attachment of the unit 20 to the apparatus body 2 and the bearing 34 is switched to the contact attitude from the separation attitude.SELECTED DRAWING: Figure 18 【課題】像担持体及び帯電部材の経時的な変形を抑制し、像担持体の帯電性能を向上させ、画像不良を防止すると共に、画像形成装置のセットアップの作業性を向上させる。【解決手段】本発明の画像形成装置は、像担持体８を帯電させる帯電部材及び帯電部材を支持する軸受け３４を有するユニット２０と、ユニット２０が装着される装置本体２と、を備え、軸受け３４は、帯電部材を像担持体８に接触させる接触姿勢と、帯電部材を像担持体８から離間させる離間姿勢と、を切り替え可能に設けられ、ユニット２０が装置本体２に装着される前の状態では、軸受け３４が離間姿勢に保持され、ユニット２０が装置本体２に装着されるのに伴って、装置本体２に設けられた押圧部９３が軸受け３４を押圧し、軸受け３４が離間姿勢から接触姿勢に切り替わることを特徴とする。【選択図】図１８