Developing unit and image forming apparatus employing the same

摘要

A developing unit includes a toner storage portion (20) containing toner and including a toner supply member (30), a development portion (9) disposed above the toner storage portion and containing the toner supplied from the toner storage portion by the toner supply member, and including a developing roller (3) and a supply roller (4) to supply the toner to the developing roller, and a partition wall (40) to divide the toner storage portion and the development portion, and including an opening portion (50) disposed under the lowest portion of the supply roller and forming a path of the toner supplied from the toner storage portion to the development portion.