| 摘要 |
PURPOSE:To prevent the scatter of toner and image irregularity by increasing frictional charge effect by vibrating a developer to left and right, by reciprocating a magnet member support in its axial direction during the development of an electrophotographic copying machine, etc. CONSTITUTION:One of frame bodies 35 at both ends of a cylindrical sleeve 22 has a shaft 36, which is rotating in one direction. In the sleeve 22, a magnet support 31 is provided and at both its ends, shafts 32 are formed and movable to the left and right of the pivot parts of the frams body 35. One shaft 32a projects out of the frame body 35, an end plate 33 is fixed to it, and energized to left by a compression spring 34 between the end plate 33 and frame body 35a. Therefore, when a face cam 37 in contact with the end plate 33 is rotated, the end plate 33 reciprocates to left and right along the contact surface of the cam 37, and a united permanent magnet 21 also oscillates to left and right. |
