| 摘要 |
PROBLEM TO BE SOLVED: To accurately move a cleaning member back and forth, between both ends of an electrode together with a support by simple control, without the occurrence of cleaning defects and damages to the device in spite of the occurrence of a change in the amount of adhesion of dust on the electrode. SOLUTION: The charger 1 is equipped with the support 4 and a conveyance screw 6. The support 4 is equipped with a projection member 4D formed with a projection 4E. The projection 4E fits into a root part 6D of the conveyance screw 6, in a radial direction from above and is made to climb over the crest part 6C by the elastic deformation of the projection member 4D. The support 4 is moved backwards and forwards, along the X-axis by the forward rotation and backward rotation of the conveyance screw 6. The projection 4E is made to abut against the crest part 6C, in such a manner that the distance L1, at the forward movement from the fulcrum 4F of the support 4 up to the abutting position with the crest part 6C, is shorter than the distance L2 at the time of the backward movement. Even if the conveyance screw 6 rotates intermittenly forward after the support 4 reaches the terminal of the forward movement, large deformation force will not act on the projection member 4D. COPYRIGHT: (C)2008,JPO&INPIT
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