DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS INCLUDING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a developing device that suppresses a toner supplied into a development housing from being fed to a developing roller without being sufficiently dispersed, and an image forming apparatus including the developing device.SOLUTION: A developing roller 21 is driven to be rotated inside a development housing 210, and carries a toner on a peripheral surface. The toner is conveyed in circulation inside a first conveyance path 221 and a second conveyance path 222 of the development housing 210. A first stirring screw 23 is disposed in the first conveyance path 221 to convey the toner in a first direction. A conveyance performance suppression part 26 is arranged on the downstream side of the first stirring screw 23. The conveyance performance suppression part 26 forms a toner accumulation part 27 to control the amount of replenishment toner supplied from a toner supply port 25. When the opening area of a first communication path 223 is A1, and the opening area of a second communication path 224 is A2, the relationship A1