| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent big noises produced by sudden removal of a cam gear from a pressure switching plate at the time of picking up a recording sheet by the cam gear so as to maintain a good environment. SOLUTION: A cam gear 31 advances on a sliding surface while rotating a pressure switching plate 85 counterclockwise, and then the pressure switching plate 85 is rotated clockwise. Then, a retracting part 89 retracts the arm part of a pressure plate cam 76, the pressure plate cam 76 is then rotated around a cam shaft part 76b and, by pressing down a press-down part 21f, a pressure plate 21 is released. At this time, since the press-down plate 21f is provided in the middle between two roller parts, the pressure plate 21 is released almost in parallel with a base 20 without being inclined.</p> |
