DEVELOPING DEVICE AND IMAGE FORMING DEVICE USING THE SAME

PROBLEM TO BE SOLVED: To provide a developing device can prevent the toner being not fully electrostatically charged from being supplied to a developing roller and reduce toner scattering and image fogging and to provide an image forming device using it. SOLUTION: This developing device 2 is provided with a developing tank 111 storing developer D, a first conveyance passage P and a second conveyance passage Q for conveying the developer D, a first conveyance member 112a provided in the first conveyance passage P, a second conveyance member 112b provided in the second conveyance passage Q, and a toner supply port 117 for supplying the toner. A developer guiding projection 118 protruding spirally and at least partially along an internal wall P1 of the first conveyance passage P to guide the developer is provided on the internal wall P1 of the first conveyance passage P. COPYRIGHT: (C)2010,JPO&INPIT