Patent ID: 8041265

Claim:
An image forming unit comprising: an image forming unit main body including a developer retaining space for retaining developer and a supply opening for supplying the developer to the developer retaining space; a developer storage unit detachably attached to the image forming unit main body, said developer storage unit including a discharge opening for discharging the developer to the developer retaining space; a rotational mechanism arranged in the image forming unit main body to be rotatable; and a movable member disposed in the image forming unit main body for moving relative to the discharge opening and the supply opening, said movable member including one end portion attached to an inner wall of the image forming unit main body and a distal end portion as a free end, said distal end portion being arranged to repeatedly contact with and separate from the rotational mechanism according to a rotation of the rotational mechanism, said distal end portion including a bent portion extending into the developer storage unit through the supply opening and the discharge opening when the distal end portion contacts with the rotational mechanism.