Patent ID: 9122199
Filing Date: 2015-09-01
Classification: G03G

Abstract:
1. A developing device comprising: a developing container having a first transport path and a second transport path disposed substantially in parallel to each other, so as to store a developer containing toner; a developer carrier supported in the developing container in a rotatable manner so as to carry the developer in the second transport path on a surface thereof; a first agitating feeding member configured to agitate and feed the developer in the first transport path; a second agitating feeding member configured to agitate and feed the developer in the second transport path to the opposite direction to the first agitating feeding member; a first developer delivery portion configured to deliver the developer from the first transport path to the second transport path; a second developer delivery portion configured to deliver the developer from the second transport path to the first transport path; and a toner sensor disposed at a part of the first transport path close to the first developer delivery portion so as to detect toner amount or toner density in the developing container, wherein a ceiling height of a part of the first transport path facing the first developer delivery portion is larger than a ceiling height of other parts of the first transport path; the first agitating feeding member includes a rotation shaft and a transporting blade formed around an outer circumference surface of the rotation shaft, and a part of the first agitating feeding member facing the first developer delivery portion does not have the rotation shaft and has a paddle portion including a plurality of first ribs parallel to the rotation shaft.