PHOTORECEPTOR UNIT, CARTRIDGE, AND ELECTROPHOTOGRAPHIC IMAGE FORMING DEVICE

• Main Authors: FUJINO TOSHITERU, HAMADA TAKATOSHI, KAWAI TACHIO, HIRAYAMA AKINOBU, MURAKAMI RYUTA, SASAKI TERUHIKO, SHINKAI YUSUKE, HAYASHIDA MAKOTO
• Format: Patent
• Language: English; Japanese
• Published: 07.09.2023
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

To develop a photoreceptor unit.SOLUTION: A photoreceptor unit that is attachable to and detachable from a device body of an image forming device comprises a photoreceptor rotatable about a rotation axis, a first gear portion, and a second gear portion having a plurality of teeth. The first gear portion is a helical gear portion with helical teeth twisted in a first circumferential direction. The second gear portion is disposed between the first gear portion and the photoreceptor with respect to the direction of the rotation axis of the photoreceptor. A gap is provided between the first gear portion and the second gear portion with respect to the direction of the rotation axis of the photoreceptor. The plurality of teeth of the second gear portion each comprise: (i) a first projection extending along at least the direction of the rotation axis of the photoreceptor; and (ii) a second projection arranged downstream of at least a portion of the first projection in the first circumferential direction and closer to the first gear portion than at least a portion of the first projection with respect to the direction of the rotation axis of the photoreceptor.SELECTED DRAWING: Figure 120 【課題】感光体ユニットを発展させる。【解決手段】画像形成装置の装置本体に着脱可能な感光体ユニットは、回転軸線まわりに回転可能な感光体と、第１ギア部と、複数の歯を備える第２ギア部と、を有する。前記第１ギア部は、第１周方向にねじれた斜歯を備える斜歯ギア部であり、前記感光体の回転軸線の方向に関して、前記第１ギア部と前記感光体の間に前記第２ギア部が配置され、前記感光体の回転軸線の方向に関して、前記第１ギア部と前記第２ギア部との間に隙間が設けられる。前記第２ギア部の前記複数の歯は、（ｉ）少なくとも前記感光体の回転軸線の方向に延びた第１突起部と、（ｉｉ）前記第１突起部の少なくとも一部よりも前記第１周方向に関して下流で、且つ、前記第１突起部の少なくとも一部よりも前記感光体の回転軸線の方向に関して前記第１ギア部の近くに配置された第２突起部と、を備える歯を含む。【選択図】図１２０