US 11,899,393 B2
Photosensitive member unit and development unit
Masao Uyama, Mishima (JP); Kenji Matsuda, Numazu (JP); and Ken Kikuchi, Mishima (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Oct. 6, 2022, as Appl. No. 17/938,486.
Application 16/453,683 is a division of application No. 15/953,732, filed on Apr. 16, 2018, granted, now 10,372,079, issued on Aug. 6, 2019.
Application 17/938,486 is a continuation of application No. 17/396,078, filed on Aug. 6, 2021, granted, now 11,487,240.
Application 17/396,078 is a continuation of application No. 16/925,154, filed on Jul. 9, 2020, granted, now 11,119,442, issued on Sep. 14, 2021.
Application 16/925,154 is a continuation of application No. 16/453,683, filed on Jun. 26, 2019, granted, now 10,747,170, issued on Aug. 18, 2020.
Claims priority of application No. 2017-081619 (JP), filed on Apr. 17, 2017.
Prior Publication US 2023/0023224 A1, Jan. 26, 2023
Int. Cl. G03G 21/18 (2006.01); G03G 21/16 (2006.01); G03G 15/08 (2006.01)
CPC G03G 21/1814 (2013.01) [G03G 15/0806 (2013.01); G03G 15/0896 (2013.01); G03G 21/1652 (2013.01); G03G 21/1817 (2013.01); G03G 21/1821 (2013.01); G03G 21/1825 (2013.01); G03G 21/1864 (2013.01); G03G 2221/166 (2013.01); G03G 2221/1853 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A cartridge comprising:
a developing unit including a developing roller and a developing frame supporting the developing roller, the developing frame including a first receiving surface;
a drum unit to which the developing unit is detachably attached, the drum unit including
a photosensitive drum being rotatable about a rotation axis which extends in a first direction,
a transfer roller contacting the photosensitive drum,
a corona charger for charging the photosensitive drum,
a drum frame supporting the photosensitive drum, the drum frame including (i) a first side wall extending in a direction crossing the first direction, (ii) a second side wall extending in a direction crossing the first direction, (iii) a bottom portion connecting the first side wall and the second side wall, and (iv) a support projection projecting from the bottom portion, wherein the first side wall, the second side wall and the support projection support the developing unit, and are disposed such that the developing unit is disposed between the first side wall and the second side wall in the first direction,
a first pressing member,
a first compression spring pressing the first pressing member against the first receiving surface such that the developing roller is pressed against the photosensitive drum, the first compression spring including (i) a first received end being received by the first pressing member so as to press the first pressing member and (ii) a second received end opposite to the first received end and being received by the drum frame,
a lifting lever configured to move the developing unit in a removal direction from the drum unit, the lifting lever including a surface on which projections are provided, and
a lever spring configured to urge the lifting lever, and disposed between the lifting lever and the drum frame,
wherein in a state where the drum unit is placed on a horizontal plane so that the surface faces upward, at least one of the projections is further from the photosensitive drum than the first received end is in a second direction orthogonal to the first direction and parallel to a horizontal direction, one end of the lifting lever is closer to the photosensitive drum than the first pressing member is in the second direction, and the one end of the lifting lever is closer to the photosensitive drum than the support projection is in the second direction.