| 摘要 |
PROBLEM TO BE SOLVED: To provide a developing device which prevents scattering toner from being accumulated at the entrance of an aperture part on a downstream side in the rotating direction of the developing sleeve of a developing container and in which such failure as developer clogging does not occur even when the rotational speed of the developing sleeve becomes high. SOLUTION: A photoreceptor drum 1, a developing device, the developing sleeve 2 disposed inside the developing device and incorporating a developing roller in which plural magnets are arranged, a developer control member 5 controlling the supply amount of the developer 3 for visualizing the latent image of the photoreceptor drum, and the first magnetic material 7 forming the spite of the developer between the material 7 and the sleeve 2 within the angle of 90 deg. on the downstream side in the rotating direction of the sleeve 2 from a position where developing pole magnetic force is peak are disposed in this device. Thus, the scattering toner is prevented from being accumulated at the entrance of the aperture part on the downstream side in the rotating direction of the sleeve 2 with respect to the developing area where the developing container is opposed to the photoreceptor drum. |
