| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming device by which processing speed is changed over by using one driving source and also an excellent image quality is obtained independently of the processing speed. SOLUTION: The image forming device is provided with one motor to generate driving force in common to a photoreceptor 7 to which the driving force is transmitted in accordance with image forming and a fixing roller 14a driven at the speed different from that at the photoreceptor 7 in accordance with the image forming for instance in an image forming part to form an unfixed image on paper P. A driving force transmission system for the fixing roller 14a transmits the driving force to the fixing roller 14a so that the rate of change of the speed occurring at the photoreceptor 7 is different from that of the speed occurring at the fixing roller 14a before and after changing the processing speed are made different. Thus, the speed difference between the photoreceptor 7 and the fixing roller 14a is kept constant independently of the processing speed, so that the excellent image quality is always obtained. |
