Fusing Device and Image Forming Apparatus using the Same

摘要

A fusing unit (20) provided in a printing path of an image forming apparatus to fuse an image (15) transferred onto a printable medium (10), the fusing unit (20) including a heat source; a heating roller (25) of which a surface is heated by heat generated by the heat source; a plurality of pressing rollers (31,35) which is provided opposite to the heating roller (25) and presses a supplied printable medium (10) in cooperation with the heating roller (25); a fusing pressing belt (40) which is wound on the plurality of pressing rollers (31,35) and forms a fusing nip contacting with the heating roller (25); and a supporting unit (50) which rotatably supports the plurality of pressing rollers (31,35) and guides the fusing pressing belt (40), a surface hardness h P of at least one of the plurality of pressing rollers (31,35) is greater than or equal to a surface hardness h H of the heating roller (25).