US 12,228,871 B2
Fixing device for suppressing reduced durability of a flexible rotary member
Hideki Ohta, Shizuoka (JP); Terutaka Endo, Kanagawa (JP); Seiji Obata, Shizuoka (JP); Jiro Moriya, Shizuoka (JP); and Takayuki Mizuta, Shizuoka (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Nov. 21, 2023, as Appl. No. 18/516,810.
Application 18/516,810 is a continuation of application No. 17/720,825, filed on Apr. 14, 2022, granted, now 11,846,902.
Application 17/720,825 is a continuation of application No. 17/033,371, filed on Sep. 25, 2020, granted, now 11,320,770, issued on May 3, 2022.
Application 17/033,371 is a continuation of application No. 16/505,519, filed on Jul. 8, 2019, granted, now 10,824,102, issued on Nov. 3, 2020.
Application 16/505,519 is a continuation of application No. 15/961,189, filed on Apr. 24, 2018, granted, now 10,386,761, issued on Aug. 20, 2019.
Application 15/961,189 is a continuation of application No. 15/299,289, filed on Oct. 20, 2016, granted, now 9,983,523, issued on May 29, 2018.
Application 15/299,289 is a continuation of application No. 14/444,884, filed on Jul. 28, 2014, granted, now 9,513,583, issued on Dec. 6, 2016.
Claims priority of application No. 2013-157582 (JP), filed on Jul. 30, 2013; application No. 2013-205134 (JP), filed on Sep. 30, 2013; and application No. 2013-246805 (JP), filed on Nov. 28, 2013.
Prior Publication US 2024/0085832 A1, Mar. 14, 2024
Int. Cl. G03G 15/20 (2006.01)
CPC G03G 15/2053 (2013.01) [G03G 2215/00143 (2013.01)] 1 Claim
OG exemplary drawing
 
1. A fixing device that fixes an image formed on a recording material to the recording material, the fixing device comprising:
a frame of the fixing device;
a flexible cylindrical rotary member configured to rotate while contacting the recording material on which the image has been formed;
a roller contacting with an outer surface of the rotary member and configured to form a fixing nip portion for pinching and conveying the recording material with the rotary member;
a movable member including
an end-surface opposing portion configured to oppose an end-surface of the rotary member in a generatrix direction of the rotary member and
an inner-surface opposing portion configured to oppose an inner surface of the rotary member at an end portion of the rotary member in the generatrix direction,
a holding member configured to movably hold the movable member, the holding member including a groove extending in a direction perpendicular to the generatrix direction and being attached to the frame by fitting the groove into the frame;
a first urging member configured to urge the holding member so as to form the fixing nip portion; and
a second urging member provided between the movable member and the holding member, and configured to urge the movable member toward the rotary member,
wherein the movable member is moved by the rotary member against a force of the second urging member when the rotary member shifts in the generatrix direction and comes into contact with the end-surface opposing portion of the movable member while the rotary member is rotating, and the inner-surface opposing portion pushes the inner surface of the rotary member by shifting of the rotary member, and
wherein as seen in a conveying direction of the recording material, the first urging member is provided on a second side of the frame opposite to a first side of the frame where the inner-surface opposing portion of the movable member is provided.