US 11,841,652 B2
Contact-separation device, fixing device, and image forming apparatus
Seiji Saitoh, Kanagawa (JP); Takahiro Imada, Kanagawa (JP); Yoshikuni Sasaki, Kanagawa (JP); Tamotsu Ikeda, Tokyo (JP); Hiromasa Takagi, Tokyo (JP); and Jun Okamoto, Tokyo (JP)
Assigned to RICOH COMPANY, LTD., Tokyo (JP)
Filed by Seiji Saitoh, Kanagawa (JP); Takahiro Imada, Kanagawa (JP); Yoshikuni Sasaki, Kanagawa (JP); Tamotsu Ikeda, Tokyo (JP); Hiromasa Takagi, Tokyo (JP); and Jun Okamoto, Tokyo (JP)
Filed on May 26, 2022, as Appl. No. 17/825,471.
Claims priority of application No. 2021-111719 (JP), filed on Jul. 5, 2021.
Prior Publication US 2023/0004107 A1, Jan. 5, 2023
Int. Cl. G03G 15/20 (2006.01)
CPC G03G 15/2032 (2013.01) [G03G 15/2064 (2013.01); G03G 2215/2009 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A contact-separation device for bringing a contact-separation member into contact with a contacted member separably, the contact-separation device comprising:
a biasing member configured to generate a biasing force;
a presser configured to press the contact-separation member against the contacted member in a pressing direction with the biasing force from the biasing member;
a cam configured to press the presser in an opposite direction being opposite to the pressing direction, the cam being rotatable and having a cam face; and
a cam follower having a cam contact face configured to contact the cam face of the cam, the cam contact face being curved to project toward the cam, the cam contact face having a curvature that is smaller than a greatest curvature of the cam face of the cam and is greater than a smallest curvature of the cam face of the cam,
wherein the cam follower is mounted on the presser.