Patent ID: 7676178

Claim:
A toner cartridge exchangeably inserted into a revolver and replenishing toner into a replenishment port of a developing device in the revolver, comprising: a toner container containing toner therein, having a predetermined length along a direction of being inserted into the revolver, at least one end surface of the toner container along a direction of being inserted into the revolver having: a first portion in which a portion of an outer shape thereof has a substantial cylindrical shape, which enables to contain a cylinder having a predetermined diameter, a second portion provided upward to the first portion having a substantial triangular shape, whose one side has a curvature along the outer shape of the revolver, and whose bottom is shorter than the predetermined diameter, and a third portion unified with at least one portion of the first portion; and a grip which allows the toner cartridge to be pulled out from the revolver.