ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS

摘要

Provided is an electrophotographic image forming apparatus including: a toner buffer unit arranged between a toner cartridge and a developing unit to receive toner from the toner cartridge and supply the toner to the developing unit; and a toner level detection unit. The toner buffer unit includes a first buffer unit connected to the toner cartridge. A first conveyance member including a rotation shaft and a conveyance wing provided in the rotation shaft and transporting the toner in a radial direction is provided in the first buffer unit. The toner buffer unit includes an elevation plate provided in the first buffer unit and elevated according to a toner level, and a sensor unit detecting a location of the elevation of the elevation plate. The elevation plate is located to be spaced apart from the conveyance wing in an axial direction of the rotation shaft.

主权项

1. An electrophotographic image forming apparatus comprising:
a developing unit including a photoreceptor; a toner cartridge; a toner buffer unit, which receives toner from the toner cartridge and which supplies the toner to the developing unit, the toner buffer unit including a first buffer unit connected to the toner cartridge, and the first buffer unit including a first conveyance member which includes a rotation shaft and a conveyance wing arranged in the rotation shaft to transport the toner in a radial direction; and a toner level detection unit which detects a remaining amount of toner in the first buffer unit, which includes an elevation plate arranged in the first buffer unit configured to elevate according to a toner level, and which includes a sensor unit which detects an elevation of the elevation plate, wherein the toner buffer unit is positioned between the toner cartridge and the developer unit, and wherein the elevation plate is spaced apart from the conveyance wing in an axial direction of the rotation shaft.