Developing device and image forming appratus provided therewith

An image forming apparatus comprising:

• a developing device;
• an image carrier having an electrostatic latent image formed on s surface thereof and receiving supply of a developer from a developing roller;
• and
• a transfer device transferring an image from the image carrier onto a sheet,
• wherein the developing device comprises:
• a housing including a pair of wall parts and a top panel provided in a manner such as to bridge between the pair of wall parts, the housing storing the developer provided with magnetic property;
• a refill developer storing 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 in a second direction opposite to the first direction, and supplying the developer to the developing roller,
• 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 blush of the developer directed from the top panel towards the conveyance member.