DEVELOPING DEVICE, IMAGE FORMING APPARATUS, COIL ATTACHING METHOD TO DEVELOPING DEVICE

摘要

A developing device includes a developer container for storing developer containing carrier and toner, the developer container including a first compartment and a second compartment in which the developer is stirred and fed, a developing roller, and a sensor including a coil. A pair of communication portion is disposed on both ends in a longitudinal direction of the compartments. In addition, a gap is formed between the first compartment and the second compartment, and a part of the first compartment adjacent to the gap is a cylindrical portion through which the developer passes. A flat cable as a coil passes through the gap and is wound around the cylindrical portion so as to form a winding by overlapping both end portions of the flat cable in a state where terminals of wires are shifted by one pitch.

主权项

1. A developing device comprising:
a developer container for storing developer containing carrier and toner; a first feeding member disposed in a first compartment that is one of compartments disposed in the developer container, so as to stir and feed the developer along with a longitudinal direction of the developer container; a second feeding member disposed in a second compartment that is the other of the compartments disposed in the developer container, so as to stir and feed the developer in the developer container in the opposite direction to the first feeding member; a developing roller disposed in an upper part of the developer container so as to face an image carrier on which an electrostatic latent image is formed, the developing roller being supported by the developer container in a rotatable manner, so as to carry the developer on a surface; and a toner density sensor for detecting toner density in the developer, the sensor including a coil, wherein a pair of communication portion for connecting an end of the first compartment to an end of the second compartment is disposed on both ends in the longitudinal direction of the first compartment and the second compartment, a gap is formed between the first compartment and the second compartment inside the pair of communication portion in the longitudinal direction, a part of the first compartment adjacent to the gap is a cylindrical portion through which the first feeding member and the developer pass, the coil is a flat cable, and the flat cable passes through the gap and is wound around the cylindrical portion so as to form a winding by overlapping both end portions of the flat cable in a state where terminals of wires are shifted by one pitch.