Patent ID: 8934817
Filing Date: 2015-01-13
Classification: G03G

Abstract:
1. A developing device comprising: a developer carrier which carries a developer containing a toner and a carrier; a magnet installed inside the developer carrier and including a plurality of magnetic poles in a rotational direction of the developer carrier; a developing chamber which feeds the developer to the developer carrier; a conveying member which conveys the developer of the developing chamber; a regulating member which regulates an amount of the developer coated on the developer carrier; and a guide portion which guides the developer to the developer carrier, wherein the guide portion forms a part of the developing chamber between the regulating member and the conveying member and forms a buffer portion that temporarily contains the developer fed from the developing chamber between the regulating member and the guide portion, and wherein, the guide portion has a facing surface opposing the developer carrier along a front surface of the developer carrier and a guiding surface which guides the developer from an upper edge of the guide portion to a downstream side of the facing surface in a rotational direction of the developer carrier, and the plurality of magnetic poles are disposed so that a magnetic direction effecting the carrier in the developer on the guiding surface is set in a direction to leave the guiding surface in a range from an upper portion toward a lower portion of the guiding surface.