| 摘要 |
<p>PROBLEM TO BE SOLVED: To suppress the occurrence of trouble due to image fogging and blowout of uncharged toner without adding, to a developing device, a member to increase miscibility of a toner to be supplied.SOLUTION: In a developing device, a maximum position of a magnetic flux density distribution in a normal direction of a magnetic pole at a position closest to a doctor member (116) is arranged between a tangent line M-1 and tangent line M-2, between a straight line N-1 and straight line N-2, and between a straight line in which the inclination of a straight line passing through the center of a developing roller (114) and the center of the doctor member (116) is inclined by 5° with the center of the developing roller (114) as a reference and a straight line in which the inclination is inclined by -5° with the center of the developing roller (114) as a reference, and satisfies the relationship 0.29≤A/(B-D/2-d/2)≤5.0, wherein A(mA) represents a maximum magnetic flux density in the magnetic flux density distribution in the normal direction of the magnetic pole at the position closest to the developing roller (114); d(mm) represents an outer diameter of a first conveying member (112); and B(mm) represents a distance between the center of the developing roller (114) and the center of the first conveying member.</p> |
