Image forming apparatus and developing device

摘要

An image forming apparatus includes an image carrier, a developer container, a moving mechanism that moves a toner of a developer to the image carrier, a stirring and transporting member that transports the developer in the developer container to the moving mechanism, a layer thickness regulating member that regulates the layer thickness of the developer held by a developer holder of the moving mechanism, and a movement regulating unit that regulates movement of the developer. An end of the movement regulating unit at a stirring and transporting member side is located at the stirring and transporting member side with respect to a tangent line tangent to the outer circumference of the stirring and transporting member and passing through a position where the density of magnetic flux of an attraction magnetic pole of a magnet member of the moving mechanism on the surface of the developing holder is the highest.

主权项

1. An image forming apparatus comprising:
an image carrier that carries an image; a developer container that stores a developer comprising a toner and a carrier; a moving mechanism that moves the toner of the developer stored in the developer container to the image carrier, the moving mechanism including
a magnet member that includes a plurality of magnetic poles, anda developer holder that is formed of a non-magnetic material, rotates around the magnet member, and holds the developer,wherein the plurality of magnetic poles include an attraction magnetic pole that attracts the developer to a surface of the developer holder; a stirring and transporting member that stirs the developer stored in the developer container and transports the developer to the moving mechanism; a layer thickness regulating member that regulates a layer thickness of the developer held by the developer holder; and a movement regulating unit that regulates movement of the developer toward the developer holder; wherein the movement regulating unit has an end at a stirring and transporting member side, the end being located at the stirring and transporting member side with respect to a tangent line which is tangent to an outer circumference of the stirring and transporting member and which passes through a position where a density of magnetic flux of the attraction magnetic pole on the surface of the developing holder is the highest.