Patent ID: 8682225
Filing Date: 2014-03-25
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a photosensitive drum; a toner cartridge; and a developing unit that that forms a toner image by visualizing a latent image formed on the photosensitive drum, the developing unit including: a feed opening through which toner is supplied from the toner cartridge, and a paddle that agitates the toner supplied through the feed opening, and feeds the toner in a direction of the photosensitive drum, wherein the feed opening has an opening length shorter than a length in a direction of a rotary axis of the paddle, the paddle includes a toner guide that diffuses the toner in the direction of the rotary axis of the paddle, the toner guide is a fin, and the following relationship is satisfied: where r is a radius of the fin and R is a radius of an inner wall surface of a casing of the developing unit.