US 11,733,636 B2
Drum unit, cartridge, electrophotographic image forming apparatus and coupling member
Tomonori Mori, Numazu (JP); and Tetsuo Uesugi, Suntou-gun (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jul. 12, 2021, as Appl. No. 17/372,635.
Application 17/372,635 is a division of application No. 17/036,376, filed on Sep. 29, 2020, granted, now 11,150,591.
Application 17/036,376 is a division of application No. 16/733,560, filed on Jan. 3, 2020, granted, now 10,824,106, issued on Nov. 3, 2020.
Application 16/733,560 is a division of application No. 16/275,692, filed on Feb. 14, 2019, granted, now 10,539,915, issued on Jan. 21, 2020.
Application 16/275,692 is a continuation of application No. PCT/JP2016/075735, filed on Aug. 26, 2016.
Prior Publication US 2021/0341870 A1, Nov. 4, 2021
Int. Cl. G03G 15/00 (2006.01); G03G 21/16 (2006.01); G03G 21/18 (2006.01)
CPC G03G 15/751 (2013.01) [G03G 15/757 (2013.01); G03G 21/1647 (2013.01); G03G 21/186 (2013.01); G03G 21/16 (2013.01); G03G 21/18 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A drum unit for a cartridge, the drum unit comprising:
a photosensitive drum; and
a coupling operatively connected to the photosensitive drum, the coupling including:
a slidable member,
a holding member including a guide configured to guide the slidable member such that the slidable member is slidable relative to the holding member between a first position and a second position,
a stopper configured to stop movement of the slidable member when the slidable member is in the first position; and
a spring configured to urge the slidable member towards the stopper,
wherein a tip of the slidable member is positioned closer to an axis of the coupling when the slidable member is positioned in the first position than when the slidable member is positioned is in the second position, and
wherein an open space is formed in the coupling between the tip of the slidable member and the axis of the coupling when the slidable member is in the first position.