Toner storing container and toner replenishing device therewith

摘要

A cylindrical toner storing container that engages with a rotation transmitting member of a developing device provided in an image forming apparatus to rotate around the rotation axis integrally with the rotation transmitting member and thereby supplies or replenishes toner to the developing device. The toner storing container has a cylindrical base body that has a toner outlet opening in the vicinity of the rotation axis on one end, the cylindrical base body has on the inner surface thereof a protruded spiral ridge, and the number of the spiral ridge on a cross section of the cylindrical base body is increased as the cross section nears the toner outlet opening.