Fixing Device Provided With Positioning Member Capable Of Positioning Heating Unit With Respect To Pressure Roller

摘要

A fixing device includes: a heating unit; a rotatable body; an urging mechanism; first and second bearings; a frame; first and second positioning members. The first and second bearings support first and second axial end portions of the rotatable body, respectively. The frame supports the heating unit and has two side walls. One of the side walls supports the first bearing, and the other supports the second bearing. Each side wall includes: a first wall portion supporting the first or second bearing; and second and third wall portions supporting the heating unit while interposing the heating unit therebetween. The first and second positioning members extend from the heating unit toward the first and second bearings, respectively. The heating unit is fixed in position relative to the first and second bearings upon engagement of the first and second positioning members with the first and second bearings, respectively.

主权项

1. A fixing device comprising:
a heating unit including a heater; a rotatable body disposed to face the heating unit, the rotatable body being configured to rotate about an axis thereof and having a first axial end portion and a second axial end portion; an urging mechanism configured to urge the heating unit toward the rotatable body; a first bearing configured to rotatably support the first axial end portion of the rotatable body; a second bearing configured to rotatably support the second axial end portion of the rotatable body; a frame configured to movably support the heating unit and having a pair of side walls, one of the pair of side walls being configured to support the first bearing, the other of the pair of side walls being configured to support the second bearing, each of the pair of side walls including:
a first wall portion configured to support corresponding one of the first bearing and the second bearing;a second wall portion configured to movably support the heating unit; anda third wall portion configured to movably support the heating unit while interposing the heating unit between the second wall portion and the third wall portion; a first positioning member extending from the heating unit toward the first bearing and configured to be engaged with the first bearing, the heating unit being fixed in position relative to the first bearing upon engagement of the first positioning member with the first bearing; and a second positioning member extending from the heating unit toward the second bearing and configured to be engaged with the second bearing, the heating unit further being fixed in position relative to the second bearing upon engagement of the second positioning member with the second bearing.