| 摘要 |
PROBLEM TO BE SOLVED: To hardly cause faulty development even when a developing unit is inclined in the longitudinal direction of a developing roller and to prevent a toner end from being detected even though some toner remains more than necessary. SOLUTION: A toner sensor 21 is provided nearly at a center part C in the longitudinal direction of the developing roller in a case 11, and the internal shape of the developing unit is formed so that toner capacity may be smaller on both sides than at the center part. As for the internal shape, the inner wall shape of the case 11 is made to differ between at the center part and on both sides thereof or the shape of an agitator is made to differ between at the center part and on both sides thereof. |
