ELECTRO-PHOTOGRAPHIC IMAGE FORMATION APPARATUS AND CARTRIDGE

• Main Authors: TOBA SHINJIRO, EGAMI YASUYUKI, KAWANAMI TAKEO, NISHIDA SHINICHI, FUKUI YUICHI
• Format: Patent
• Language: English; Japanese
• Published: 24.09.2020
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

To further develop the conventional technique.SOLUTION: A cartridge comprises: a holding part which is movable between the first position and the second position for stably holding a second unit by a first unit at the separation position and the development position; and a contact force reception part which can receive the contact force for moving the holding part from the first position toward the second position for moving the second unit to the development position while the second unit is at the separation position. In a case where the tangential line to the surface of a photoreceptor at an intersection further from the rotation center of a charging member of the intersection between the straight line connecting the rotation center of the charging member and the rotation center of the photoreceptor and the surface of the photoreceptor when viewed along the direction of the rotation axial direction of the development member is defined as a prescribed tangential line, and a region in which the rotation center of the charging member is not arranged when dividing the region with the prescribed tangential line as the boundary is defined as a prescribed region, the contact force reception part is arranged in the prescribed region when viewed along the direction of the rotation axial line of the development member while the second unit is at the separation position.SELECTED DRAWING: Figure 1 【課題】 従来技術を更に発展させる。【解決手段】 第１ユニットによって第２ユニットを離間位置、現像位置で安定的に保持するための第１位置、第２位置との間を移動可能な保持部と、第２ユニットが離間位置にある時に、第２ユニットを現像位置へ移動させるために、保持部を第１位置から第２位置へ向かって移動させる当接力を受けることが可能な当接力受け部と、を有し、現像部材の回転軸線の方向に沿って見た時における、帯電部材の回転中心と感光体の回転中心と結ぶ直線と感光体の表面との交点のうち帯電部材の回転中心から遠い方の交点における感光体の表面への接線を所定接線とし、所定接線を境界として領域を分けた時に帯電部材の回転中心が配置されていない領域を所定領域とすると、第２ユニットが離間位置にある時に現像部材の回転軸線の方向に沿って見ると、当接力受け部は、所定領域に配置されているカートリッジ。【選択図】 図１