Patent ID: 9746798
Date: 2017-08-29
CPC Classifications: G03G

Claim:
1. A developing device comprising: a casing defining an internal space therein and having a partitioning wall partitioning the internal space into a toner chamber and a developing chamber, the toner chamber accommodating toner therein, the developing chamber being positioned upward of the toner chamber, the partitioning wall having a supply opening and a discharge opening for providing communication between the toner chamber and the developing chamber; a photosensitive drum configured to rotate about a first axis extending in an axial direction; a developing roller accommodated in the developing chamber and configured to supply toner to the photosensitive drum, the developing roller being configured to rotate about a second axis; a supply roller accommodated in the developing chamber and configured to supply toner to the developing roller, the supply roller having a first axial end and a second axial end and being configured to rotate about a third axis positioned downward of the second axis, the supply opening being positioned outside of the first axial end of the supply roller in the axial direction and the discharge opening being positioned outside of the second axial end of the supply roller in the axial direction; a first conveying member accommodated in the toner chamber and configured to convey the toner accommodated in the toner chamber into the developing chamber through the supply opening, the first conveying member being configured to rotate about a fourth axis positioned downward of the third axis; and a second conveying member accommodated in the developing chamber and configured to convey the toner supplied by the first conveying member from the supply opening to the discharge opening in the axial direction, wherein the first conveying member comprises: