US 12,216,422 B2
Fixing device
Sasuke Endo, Chigasaki Kanagawa (JP)
Assigned to Toshiba Tec Kabushiki Kaisha, Tokyo (JP)
Filed by Toshiba Tec Kabushiki Kaisha, Tokyo (JP)
Filed on Jan. 25, 2023, as Appl. No. 18/159,564.
Claims priority of application No. 2022-089684 (JP), filed on Jun. 1, 2022.
Prior Publication US 2023/0393505 A1, Dec. 7, 2023
Int. Cl. G03G 15/20 (2006.01)
CPC G03G 15/2053 (2013.01) 18 Claims
OG exemplary drawing
 
1. A fixing device, comprising:
a cylindrical fixing body;
a heater unit in an interior region surrounded by the cylindrical fixing body and including a heating element group, the heater unit extending lengthwise in a first direction parallel to an axial direction of the cylindrical fixing;
a heat transfer member having a contact surface that contacts heater unit and an opposite surface on a side opposite the heater unit; and
an insulation member having a thermal conductivity lower than the heat transfer member, the insulation member being on an end portion of the heat transfer member and adjacent to the contact surface in the first direction, wherein
the outer edges of the opposite surface in the first direction are at positions along the first direction that are beyond the outer edges of the contact surface in the first direction, and
the insulation member is between the heat transfer member and the heater unit in a second direction orthogonal to the opposite surface.