| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a developing device capable of preventing irregular screw pitch and developing ghost. <P>SOLUTION: When the tip of a developer amount regulating member is arranged near a draw-up magnetic pole, and it is assumed that the closest distance between the surface of a developer carrier corresponding to the draw-up magnetic pole and a developer supply member is C, the height of the spiral blade of the developer supply member is H, the flux density in a normal direction of the developer carrier by the draw-up magnetic pole is Br, an angle of elevation formed by a line linking the center of the rotary shaft of the developer carrier and the surface of the developer carrier corresponding to the draw-up magnetic pole to a horizontal line passing through the center of the rotary shaft is θa, and an angle of depression formed by a line linking the center of the rotary shaft of the developer carrier and the center of the rotary shaft of the developer supply member to the horizontal line passing through the center of the rotary shaft is θb, they satisfy conditions: H≤C, 40≤Br≤60[mT] and 40°≤(θa+θb)≤60° in the developing device, which has a developer amount leveling member arranged near the draw-up magnetic pole and an isolation member arranged near a peeling magnetic pole. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
