Patent ID: 7734228
Filing Date: 2010-06-08
Classification: G03G

Abstract:
1. A development device, comprising: a developer carrier that develops an electrostatic latent image to obtain a toner image; a first chamber that houses a first rotary conveying body which conveys a developer to the developer carrier; and a second chamber that houses a second rotary conveying body which rotates to convey the developer in a second direction opposite to a direction in which the first rotary conveying body conveys the developer, wherein the first chamber and the second chamber are partitioned by a partition member including first and second opening sections at each end thereof, whereby the developer is circulated and moved via the opening sections when the first and second rotary conveying bodies rotate, a first curved surface is provided in at least one of four sections where internal walls in which bearings of the first rotary conveying body and the second rotary conveying body are positioned intersect with internal walls that are parallel to the bearings, a second curved surface is provided in a second of the four sections, the first curved surface and the second curved surface are disposed on the same end of the development device, and the second curved surface faces the first curved surface through the first opening section.