| 摘要 |
PURPOSE:To elastically absorb unevenness in transmitting driving force in a copying machine or the like, by providing an elastic member between a driving body and a driven body. CONSTITUTION:A driven shaft and a driving disc 43 are united into one body without uniting a pulley 21 and the driven disc into one body. The disc 43 begins to rotate with rotation of the driven shaft, but a driven disc 45 undergoing pressure by a compressing spring 42 begins to rotate slowly while it is sliding. The driven disc 45 soon comes into contact with a pin 44 at the end, and the disc 45 comes to rotate in one body with the driven shaft, thus permitting abrupt power transmission not to be given to an optical scanning means, so deviation of its end to be prevented, uneven rotation of the pulley 21 to be prevented from transmission of 0-200Hz low frequency component of the driven shaft, by a buffer material 46, such as rubber or sponge, provided between the driven disc 45 and the pulley 21, both united through the buffer 46, and consequently, image blurring to be avoided. |
