Patent ID: 9639044
Date: 2017-05-02
CPC Classifications: G03G

Claim:
1. A fixing device comprising: a housing; a belt member constituted of a flexible tubular shape; a pressure roller rotated and pressed by the belt member, the pressure roller forming a fixing nip portion with the belt member, a sheet passing through the fixing nip portion; and a nip forming member located at an inner peripheral portion of the belt member, the nip forming member having an opposed surface along an outer peripheral surface of the pressure roller, the nip forming member pressing the belt member to the pressure roller, the fixing device further comprising: the fixing device further includes a pressing member located opposed to the pressure roller in the axial direction, the pressing member pressing an outer peripheral surface of the end portion of the belt member in the axial direction to radially inward of the belt member, the pressing member presses the outer peripheral surface of the belt member such that a cross-sectional shape of the end portion of the belt member in the axial direction intersecting with the axial direction goes along the cross-sectional shape of the belt member at the fixing nip portion, the belt member is rotatably driven by the pressure roller, the fixing device further includes a regulating member inserted from the end portion of the belt member in the axial direction into the tubular-shape, the regulating member abutting on an inner peripheral surface of the belt member to regulate the cross-sectional shape of the belt member, and the regulating member passes through an inner peripheral portion of the ring-shaped member and is inserted into the tubular-shape of the belt-shaped member.