Developing apparatus with backflow prevention portion and image forming apparatus with backflow prevention portion

摘要

This developing apparatus includes a toner supply passage for supplying new toner fed from a toner cartridge to a toner carrying region where a toner carrier is arranged, and the toner supply passage is provided with a backflow prevention portion for preventing old toner from backflowing toward the toner cartridge.

主权项

1. A developing apparatus comprising:
an image carrier where an electrostatic latent image is formed; a toner carrier for supplying toner to the electrostatic latent image formed on the image carrier; and a toner supply passage for supplying toner fed from a toner cartridge to a toner carrying region where the toner carrier is arranged, wherein the toner supply passage is provided with a backflow prevention portion for preventing the toner from backflowing toward the toner cartridge, the backflow prevention portion has a structure that the height position descends toward the toner carrying region, the toner supply passage includes a first chamber connected to the toner cartridge and a second chamber connected to the first chamber and the toner carrying region, and the bottom surface of the second chamber is positioned below the bottom surface of the first chamber.