US 11,789,401 B2
Cartridge including photosensitive drum and developing roller that can be easily separated
Toshiaki Takeuchi, Tokyo (JP); Koichi Ooishi, Tokyo (JP); and Hiroki Shimizu, Tokyo (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Sep. 30, 2022, as Appl. No. 17/957,085.
Application 17/957,085 is a continuation of application No. 17/377,750, filed on Jul. 16, 2021, granted, now 11,493,878.
Application 17/377,750 is a continuation of application No. 17/021,228, filed on Sep. 15, 2020, granted, now 11,188,021, issued on Nov. 30, 2021.
Claims priority of application No. 2019-168869 (JP), filed on Sep. 17, 2019; and application No. 2020-129837 (JP), filed on Jul. 31, 2020.
Prior Publication US 2023/0025390 A1, Jan. 26, 2023
Int. Cl. G03G 15/08 (2006.01); G03G 21/16 (2006.01); G03G 21/18 (2006.01)
CPC G03G 21/1676 (2013.01) [G03G 15/0808 (2013.01); G03G 21/1821 (2013.01); G03G 21/1828 (2013.01); G03G 2221/163 (2013.01); G03G 2221/1861 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A printer cartridge comprising:
a drum unit including a photosensitive drum, a charging roller contacting the photosensitive drum, and a first portion;
a developing unit including developer, a developing roller, a developing frame provided with a chamber in which the developer, a rotation shaft and a stirring sheet being attached to the rotation shaft are accommodated, a second portion, and a receiving portion configured to receive an external force, the developing unit being rotatably connected to the drum unit and configured to be rotatable relative to the drum unit about a rotational axis between:
a first posture where the developing roller is in contact with the photosensitive drum in a state where the receiving portion is receiving the external force; and
a second posture where the developing roller is separated from the photosensitive drum and a surface of the second portion is in contact with a surface of the first portion,
wherein, in a state where the drum unit is in a predetermined posture and the developing unit is in the first posture, the developing unit moves by its own weight to the second posture in a state where the external force is removed from the receiving portion, and
wherein in a state where the drum unit is in the predetermined posture:
a rotation center of the photosensitive drum is disposed higher than the rotational axis and the charging roller is disposed lower than the photosensitive drum in relation to a vertical direction.