Patent attributes
A developing unit in an image forming device is disclosed which includes a first agitation transport member, a second agitation transport member, a bulkhead, and a housing. The second agitation transport member is arranged to be parallel to the first agitation transport member in the horizontal direction, and configured to simultaneously agitate and transport developer in cooperation with the first agitation transport member and mix developer with the externally supplied toner. The bulkhead has a partition member arranged between the first agitation transport member and the second agitation transport member, and a guide member that is formed to be integrated with the partition member and guide developer peeled off from the developing roller to the first agitation transport member. The bulkhead can arranged in the housing such that there is no space between first and second ends of the bulkhead and the housing.