| 摘要 |
PROBLEM TO BE SOLVED: To provide a toner storage container that allows the supply of toner to a developing device even when the remaining amount of toner is reduced.SOLUTION: A toner storage container includes a container body that accommodates a toner to be supplied to a toner conveying device, a conveying unit that conveys the toner from one end in the longitudinal direction of the container body to the other end in which a container opening is provided, a tube receiving port that is arranged at the container opening and can receive a conveyance tube fixed to the toner conveying device, and a pump-up unit that moves the toner toward a toner receiving port of the conveyance tube. An external additive used in the toner includes inorganic fine particles and when the 50-th number percent of the diameter of secondary particles of the inorganic fine particles is Db50 and the 10-th number percent is Db10, Db50/Db10 is 1.1 to 1.2; the pump-up unit includes a pump-up wall surface that extends toward the projection from the internal wall surface of the container body and a curved part that curves along the projection; and the projection is present between the curved part and the toner receiving port of the conveyance tube. |
