| 摘要 |
<p>A fusing device (5) includes a regulating member (60) and a switching mechanism (70). The regulating member (60) has a flat surface (61) and an arc-shaped surface (63) and regulates a nip (N) formed by a belt (26) and a roller (19). The switching mechanism (70) switches the fusing device (5) between a first mode and a second mode in which an unfused toner image is fused to a recording medium (9). The flat surface (61) is provided along a direction in which the recording medium (9) enters the nip (N). The arc-shaped surface (63) is provided downstream of the flat surface (61) in the recording medium entry direction, is contiguous to the flat surface (61), and is curved toward the roller (19). In the first mode, the nip (N) is regulated by the flat surface (61) and the arc-shaped surface (63). In the second mode, the nip (N) is regulated by the flat surface (61) of the flat and arc-shaped surfaces (61, 63).</p> |
