DEVELOPING UNIT AND IMAGE FORMING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a stable image not only in an initial stage but also in the case of aging by improving allowance to the scattering of developer toward the inside of a machine. SOLUTION: A developer scattering preventing member coming into contact with a developer layer on a developer carrier whose layer thickness is regulated is arranged so that the edge of the free end may not come into contact with the rising range of a magnetic brush by a developing main pole while the free end comes into contact with an image carrier, and the half value width of the developing main pole is set to <=30 deg..