Developing device and toner cartridge

摘要

A toner cartridge (42, 342, 442, 542) is to be attached to a developing device (40, 340, 440, 540). The developing device (40, 340, 440, 540) is provided with a developing roller (58) comprising a rotational axis extending along a horizontal direction, a first casing (54), and a first transporting member (226, 726). The first casing (54) includes a developing chamber (220) for accommodating the toner to be supported by the developing roller (58), a first feed opening (222a, 322a, 422a, 522a) for feeding the toner from the toner cartridge (42, 342, 442, 542) to the developing chamber (220), and a first return opening (222b, 322b, 422b, 522b) for returning the toner from the developing chamber (220) to the toner cartridge (42, 342, 442, 542). The first transporting member (226, 726) is located within the developing chamber (220). The first transporting member (226, 726) transports the toner within the developing chamber (220) from the first feed opening (222a, 322a, 422a, 522a) to the first return opening (222b, 322b, 422b, 522b). The first feed opening (222a, 322a, 422a, 522a) and the first return opening, (222b, 322b, 422b, 522b) are offset along the horizontal direction. The first feed opening (222a, 322a, 422a, 522a) is located higher than the first return opening (222b, 322b, 422b, 522).