Abstract: A developing device includes a developer bearer to bear developer, a developer containing compartment disposed lower than the developer bearer, and a conveying screw disposed in the developer containing compartment. The developing device further includes an inclined face extending from an inner wall of the developer containing compartment obliquely upward toward the developer bearer, and the inclined face opposes the conveying screw from above.

Abstract: A developing device includes a developer bearer, a magnetic field generator, a casing having an opening, a developer conveyor to rotate inside a developer containing compartment below the developer bearer, and a developer regulator. A side wall of the casing defines a bottom end of the opening, and the developer regulator is disposed on the side wall. The side wall includes an upper end face facing the developer bearer below an axis of the developer bearer and a curved inner face along an orbit of rotation of the developer conveyor, extending from below the developer conveyor toward the upper end face. On a virtual plane perpendicular to the axis of the developer bearer, an intersection between a tangent line to an upper end of the curved inner face and the surface of the developer bearer is in a range from a tangential magnetic-flux peak and a closest approach point.

Abstract: A developing device includes a developer bearer to bear developer, a developer containing compartment to contain developer, and a developer conveyor including a shaft and disposed in the developer containing compartment. The developer bearer has magnetic poles adjacent to each other and identical in polarity, and the adjacent magnetic poles are disposed on a downward-rotation side where a surface of the developer bearer moves downward. The developer conveyor rotates to supply the developer to the surface of the developer bearer and collect the developer downstream, in a rotation direction of the developer bearer, from a developing range opposing a latent image bearer. The developing device further includes an inclined face disposed vertically below the adjacent magnetic poles, and the inclined face is inclined down toward the developer conveyor.