Patent ID: 9063468
Filing Date: 2015-06-23
Classification: G03G

Abstract:
1. A developing device comprising: a housing including a pair of wall parts, and a top panel being provided between the pair of wall parts in a manner such as to bridge therebetween, the housing storing a developer; a refill developer storage part being attachable and detachable to and from the housing and storing a refill developer to be refilled to the housing; a developing roller being rotatably supported by the housing between the pair of wall parts and carrying the developer; a developer conveyance path including a first conveyance path being arranged in the housing in a manner such as to be spaced from the developing roller and having the developer conveyed therethrough in a first direction, and a second conveyance path being arranged between the developing roller and the first conveyance path, having the developer conveyed therethrough towards a second direction opposite to the first direction, and supplying the developer to the developing roller, the developer conveyance path having a top thereof defined by the top panel and having the developer conveyed therethrough in a circulating manner; a developer receiving port being disposed at the top panel oppositely to the first conveyance path and receiving the refill developer onto the first conveyance path; a conveyance member being disposed on the first conveyance path, being driven into rotation, and conveying the developer in the first direction in a manner such that the developer passes through a position where the developer receiving port opposes the first conveyance path; and a magnetic member being arranged in the housing and forming, on the first conveyance path downstream of the developer receiving port in the first direction, a magnetic brush of the developer directed from the top panel towards the conveyance member, wherein the conveyance member includes a rotation axis being provided in a manner such as to extend in the first direction, and a screw blade being formed around the rotation axis, and wherein the conveyance member includes, in a region opposing the magnetic member in the first direction, an omission part where the screw blade is partially omitted.