ELECTRIFICATION DEVICE, PROCESS CARTRIDGE USING THE SAME, AND IMAGE FORMATION APPARATUS

PROBLEM TO BE SOLVED: To provide an electrification device that can eliminate the need to take costly measures, improve slidability between an electrification roller and a bearing member, suppress generation of an abnormal sound due to sliding, and stabilize electric conduction, a process cartridge...

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Bibliographic Details
Main Author FUKUI YUICHI
Format Patent
LanguageEnglish
Japanese
Published 20.06.2016
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:PROBLEM TO BE SOLVED: To provide an electrification device that can eliminate the need to take costly measures, improve slidability between an electrification roller and a bearing member, suppress generation of an abnormal sound due to sliding, and stabilize electric conduction, a process cartridge using the same, and an image formation apparatus.SOLUTION: An electrification device has: an electrification roller comprising an electrically conductive shaft part at an end; and a bearing member, as a support part supporting the shaft part, which has a plurality of arcuate projection parts formed in a cross section crossing an axial direction within an angle range smaller than 180 degrees in a circumferential direction, the support part being formed inside an end face of the shaft part in the axial direction.SELECTED DRAWING: Figure 1 【課題】コストのかかる対策を採る必要がなく、帯電ローラと軸受部材の摺動性を向上させ、摺動による異音の発生を抑え、導通を安定させることができる帯電装置、およびこれを用いたプロセスカートリッジ、画像形成装置を提供する。【解決手段】帯電装置で、端部に導電性の軸部を備えた帯電ローラと、前記軸部を支持する支持部として、軸方向に交差する断面において円周方向で１８０度より小さい角度範囲内に複数の円弧状凸部が形成され、前記支持部が前記軸方向において前記軸部の端面よりも内側に形成された軸受部材と、を有する。【選択図】図１
Bibliography:Application Number: JP20140247851