Patent ID: 8190059

Claim:
A developing unit comprising: a developer case that accommodates developer; a developing roller configured to supply the developer accommodated in the developer case to a photoreceptor; and a movement member coupled with the developer case, the movement member being configured to move between a first position where the movement member is substantially housed inside the developer case and a second position where the movement member protrudes beyond the developer case; the movement member comprising: a body configured to move between the first position and the second position by rotating with respect to the developer case with a rotational axis as a center; a first protruding portion fixed to the body, the first protruding portion protruding from the body in a direction substantially parallel to the rotational axis; and a second protruding portion directly fixed to the body, the second protruding portion protruding from the body in a direction substantially perpendicular to the rotational axis.