DRUM UNIT AND IMAGE FORMING APPARATUS

To prevent wiring between an image forming apparatus and a drum unit from becoming complicated and improve the accuracy of a toner sensor in measuring the amount of toner.SOLUTION: A drum unit comprises: a photoreceptor drum; a developing unit; a connector 55A; and a relay substrate 58. The developi...

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Main Authors WAKIZAKA MASAAKI, AKAGI HIROHITO, SUGIURA SHINTA, HACHIYA SHUNSUKE, INOUE KEITA
Format Patent
LanguageEnglish
Japanese
Published 10.08.2022
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:To prevent wiring between an image forming apparatus and a drum unit from becoming complicated and improve the accuracy of a toner sensor in measuring the amount of toner.SOLUTION: A drum unit comprises: a photoreceptor drum; a developing unit; a connector 55A; and a relay substrate 58. The developing unit has a magnetic roller, a developer container, a conveying member that can convey toner and carrier toward the magnetic roller, and a toner sensor 66 that can measure the amount of toner in the developer container. The relay substrate 58 electrically connects the toner sensor 66 and the connector 55A to each other to communicate a measurement signal measured by the toner sensor to an image forming apparatus. The relay substrate 58 has a relay substrate memory 58M having a storage area that stores control voltage information for generating a control voltage being a voltage for controlling the measurement signal measured by the toner sensor 66, and communicates the control voltage information stored in the relay substrate memory 58M to the image forming apparatus.SELECTED DRAWING: Figure 9 【課題】画像形成装置とドラムユニットとの間の配線が複雑化することを抑制し、トナーセンサのトナー量を測定する精度を向上させる。【解決手段】ドラムユニットは、感光体ドラムと、現像ユニットと、コネクタ５５Ａと、中継基板５８と、を備える。現像ユニットは、磁気ローラと、現像容器と、磁気ローラに向けてトナーとキャリアを搬送可能な搬送部材と、現像容器内のトナー量を測定可能なトナーセンサ６６とを有する。中継基板５８は、トナーセンサ６６とコネクタ５５Ａを電気的に接続してトナーセンサが測定した測定信号を画像形成装置へ通信する。中継基板５８は、トナーセンサ６６の測定信号を制御するための電圧である制御電圧を生成するための制御電圧情報を記憶する記憶領域を有する中継基板メモリ５８Ｍを有し、中継基板メモリ５８Ｍに記憶された制御電圧情報を画像形成装置へ通信する。【選択図】図９
Bibliography:Application Number: JP20210013750