| 摘要 |
PURPOSE:To provide a developing device capable of attaining noncontact development efficient in developing without development unevenness. CONSTITUTION:In the developing device carrying a two-component developer D to a developing region A by a developing sleeve 81 in which a magnet body 82 is fixedly provided and making toner soar up in a vibrating electric field to develop a latent image, a control electrode plate 84 constituted in such a manner that an electrode part 84a capable of applying a voltage is disposed on the top end part on the downstream side of the electrode plate 84 fixedly provided in the upstream part of the developing region A is provided and the top end part on the downstream side of the electrode plate 84 is set in a position where -0.05<=d3(-)-1.0(mm) is obtained when the distance between the top end on the downstream side of the control electrode plate 84 and the nearest position of an image forming body to the developing sleeve 81 is defined as d3(mm), where the upstream and downstream sides from the nearest position are positive and negative respectively. |
