| 摘要 |
PROBLEM TO BE SOLVED: To reduce the risk of image deterioration attributable to an electric field by increasing the discharge of toner from the surface of a piezoelectric donor member, and also by reducing the AC electric field. SOLUTION: A donor member of a developing device is arranged inside a reproducing unit, and the developing nip is formed by the latent image supporting surface of the photoreceptor. In this case, biased vibrating part 46 is provided with at least a first conductive electrode 62 and a first bias 64 that biases at least the first conductive electrode 62; and the first conductive electrode 62 is formed inside the vibrating part 46 so as to be adjacent to a layer 60, and controls the discharge of a vibrating toner from the donor member. A developing electrode part 48 comprises a pair of second conductive electrodes 66 and a second bias 68 thereto, and is arranged at least between the first conductive electrode 62 and the latent image supporting surface so as to intensify the discharge of toner particles from the donor member, and the powder cloud of toner is formed inside a developing nipple, so that a good quality image can be developed. |
