CHARGING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS

PROBLEM TO BE SOLVED: To suppress the contact of a charging roller cleaning member to a charging roller, and damage to the surface of the charging roller due to rubbing, so as to prevent the occurrence of abnormal images due to the damage to the surface of the charging roller even in an imaging unit...

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Bibliographic Details
Main Authors WATANABE KAZUHIKO, TAWADA TAKAAKI, KIKUCHI HISASHI
Format Patent
LanguageEnglish
Japanese
Published 13.04.2015
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:PROBLEM TO BE SOLVED: To suppress the contact of a charging roller cleaning member to a charging roller, and damage to the surface of the charging roller due to rubbing, so as to prevent the occurrence of abnormal images due to the damage to the surface of the charging roller even in an imaging unit including a charging device having improved image quality and the extended life.SOLUTION: A charging device 1 can rotate in contact with a charging roller 2, and includes a brush roller 7 having brush fibers 7a electrostatically implanted in a spiral manner on the surface of a shaft 7b. In the brush roller 7, the implantation width 35 in the circumferential direction of the brush roller 7 is smaller than the contact width 36 between the brush roller 7 and charging roller 2 in the circumferential direction of the brush roller 7. 【課題】帯電ローラへの帯電ローラ清掃部材の接触、摺擦による帯電ローラ表面の損傷を抑制して、高画質化、高寿命化された帯電装置を含む作像ユニットにおいても、帯電ローラ表面の損傷による異常画像の発生を防止する。【解決手段】帯電装置１は、帯電ローラ２に接触して回転可能であって、軸７ｂの表面上に螺旋状に静電植毛されたブラシ繊維７ａを有するブラシローラ７を備えている。ブラシローラ７は、ブラシローラ７の周方向の植毛幅３５が、ブラシローラ７の周方向におけるブラシローラ７と帯電ローラ２との接触幅３６よりも小さい。【選択図】図９
Bibliography:Application Number: JP20130202558