| 摘要 |
PURPOSE:To execute the correct positioning of a developing device to an image holding body by pushing elastically the first and second developing devices from both side part sides to the image holding body. CONSTITUTION:When to push the first or second developing devices 23 and 24 to a photosensitive drum 2, a link 41 or 42 is shifted in the left direction and the developing device 23 or 24 and a pin 31 or 33 and a rotary shaft are abutted to the guide, at that time, the motion of a guide push 62 or 61 is stopped. The links 41 and 42 is shifted further in the left direction, and thereafter, the guide push 62 or 61 are pushed to the drum 2 side by the biasing force of a spring 63. A clearance delta4 or delta2 occurs between the guide push 62 or 61 and the link 41 or 42. Thus, the developing device 23 or 24 is pushed to the guide by the biasing force of the spring 63 from both side parts in the length direction and the correct positioning to the drum 2 can be executed. |
