US 12,072,649 B2
Fixing device and image forming apparatus
Yuichi Ikeno, Maibara (JP)
Assigned to BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed by BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed on Mar. 20, 2023, as Appl. No. 18/186,356.
Claims priority of application No. 2022-055301 (JP), filed on Mar. 30, 2022.
Prior Publication US 2023/0314985 A1, Oct. 5, 2023
Int. Cl. G03G 15/20 (2006.01); G03G 15/00 (2006.01); G03G 15/16 (2006.01); G03G 21/18 (2006.01)
CPC G03G 15/167 (2013.01) [G03G 15/2053 (2013.01); G03G 15/206 (2013.01); G03G 15/751 (2013.01); G03G 21/1832 (2013.01); G03G 2221/1654 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A fixing device, comprising:
a first rotating body;
a second rotating body configured to form a nip in combination with the first rotating body;
a frame configured to support the first rotating body and the second rotating body, the frame having an opening through which a sheet conveyed toward the nip passes;
a shutter rotatable about a first axis between a closed position in which the shutter covers the opening and an open position in which the shutter uncovers the opening;
a pressure arm configured to press the first rotating body against the second rotating body;
a cam supported by a shaft and configured to push the pressure arm, the cam and the shaft being rotatable about a second axis;
a shutter arm connected to the shutter and configured to rotate about the shaft independent of the cam, to cause the shutter to rotate between the closed position and the open position; and
an arm cam configured to rotate about the shaft to push the shutter arm at a position offset from the second axis and cause the shutter arm to rotate about the second axis.