US 12,228,865 B2
Image forming apparatus
Ryuji Tanaami, Yokohama (JP); Keita Nakajima, Suntou-gun (JP); Koji Miwa, Susono (JP); and Yuji Mitsui, Susono (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Nov. 8, 2022, as Appl. No. 17/982,601.
Application 17/982,601 is a division of application No. 17/029,165, filed on Sep. 23, 2020, granted, now 11,543,759.
Application 17/029,165 is a division of application No. 16/294,005, filed on Mar. 6, 2019, granted, now 10,824,088, issued on Nov. 3, 2020.
Application 16/294,005 is a division of application No. 15/810,567, filed on Nov. 13, 2017, granted, now 10,274,859, issued on Apr. 30, 2019.
Application 15/810,567 is a division of application No. 15/198,391, filed on Jun. 30, 2016, granted, now 9,846,384, issued on Dec. 19, 2017.
Application 15/198,391 is a division of application No. 14/276,293, filed on May 13, 2014, granted, now 9,720,345, issued on Aug. 1, 2017.
Application 14/276,293 is a continuation of application No. 13/115,237, filed on May 25, 2011, granted, now 8,768,202, issued on Jul. 1, 2014.
Claims priority of application No. 2010-126812 (JP), filed on Jun. 2, 2010; application No. 2011-091240 (JP), filed on Apr. 15, 2011; and application No. 2011-114806 (JP), filed on May 23, 2011.
Prior Publication US 2023/0069503 A1, Mar. 2, 2023
Int. Cl. G03G 15/04 (2006.01); B41J 11/46 (2006.01); G03B 27/52 (2006.01); G03G 15/00 (2006.01); G03G 15/08 (2006.01); G03G 21/16 (2006.01); G03G 21/18 (2006.01)
CPC G03G 15/04036 (2013.01) [G03G 21/1633 (2013.01); G03G 21/1666 (2013.01); G03G 21/1853 (2013.01); B41J 11/46 (2013.01); G03B 27/523 (2013.01); G03B 27/528 (2013.01); G03G 15/00 (2013.01); G03G 15/04 (2013.01); G03G 15/0865 (2013.01); G03G 15/0868 (2013.01); G03G 15/0872 (2013.01); G03G 2215/0668 (2013.01); G03G 2215/0692 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An image forming apparatus on which a plurality of cartridges, each of which includes a photosensitive drum to be driven to rotate, are mountable, the image forming apparatus comprising:
a plurality of mounting portions, each of the plurality of mounting portions being configured such that a cartridge of the plurality of cartridges is mountable on a corresponding mounting portion of the mounting portions by inserting the cartridge of the plurality of cartridges to the corresponding mounting portion of the mounting portions in a direction of a rotational axis of the photosensitive drum included in the cartridge;
a plurality of LED units, each of the LED units corresponding to one of the plurality of mounting portions, each of the LED units including an LED array configured to expose the photosensitive drum included in the cartridge, which has been mounted on the corresponding mounting portion, of the plurality of cartridges; and
a plurality of positioning mechanisms, each of the positioning mechanisms corresponding to one of the plurality of the LED units and each of positioning mechanisms including:
a spring configured to act on the corresponding LED unit so as to position the LED unit with respect to the cartridge on the corresponding mounting portion by contraction of the spring; and
a cam mechanism configured to move the corresponding LED unit toward the photosensitive drum and press the spring so as to contract the spring in association with a movement of the cartridge in a mounting operation of the cartridge to the corresponding mounting portion.