A developer container includes: a container body that stores developer; an agitating member that is rotatably disposed in the container body and rotates to agitate the developer; a first swing member that includes a first fixed end, a first free end, a first surface, and a second surface opposite the first surface, and that is swung by the agitating member coming into contact with the first surface when the agitating member rotates; and a projecting support that is disposed to face the second surface and project from a wall surface formed in the container body, and that abuts the second surface.

A stirring device includes a stirrer configured to stir a stirred object, at least another component of the stirring device, and a coating layer. The coating layer is disposed on at least one of a contact part of the stirrer that contacts the at least another component and a contacted part of the at least another component contacted by the stirrer.

A developer container includes a body, an agitating bar, and an agitating film. The body includes a bottom plate; a first side wall; a second side wall facing the first side wall; a developer chamber defined by the bottom plate, the first side wall, and the second side wall, the developer chamber storing developer; and an opening formed in the bottom plate to allow the developer chamber to communicate with an outside of the developer chamber and allow the developer to be supplied from the developer chamber to the outside of the developer chamber. The agitating bar is configured to rotate to agitate the developer stored in the developer chamber. The agitating film is attached to the agitating bar and configured to, when rotation of the agitating bar stops, stop in a state where the agitating film abuts the first side wall and the second side wall.

The present disclosure provides a developer container including a developer supplying box and a developer containing box. A first gear is rotatably connected to the developer supplying box, and a rotating shaft is inserted into the first gear; first stirring blades are fixed to two sides of the rotating shaft, and a second stirring blade is fixed at the rotating shaft; a first sliding cover is sleeved on the developer supplying box, and a sliding cover powder outlet is disposed on the first sliding cover; a supply box powder outlet is disposed on the developer supplying box; the first gear is engaged with a second gear, the second gear is engaged with a third gear, the third gear is engaged with a fourth gear, and the fourth gear is engaged with a fifth gear; and a screw feeding rod is inserting into the fifth gear.

A stirring device includes a stirrer configured to stir a stirred object, at least another component of the stirring device, and a coating layer. The coating layer is disposed on at least one of a contact part of the stirrer that contacts the at least another component and a contacted part of the at least another component contacted by the stirrer.

A developing cartridge is attachable to a drawer that is movable in a first direction relative to a main housing of an image forming apparatus. The developing cartridge includes: a casing having a toner chamber; and a developing roller positioned at one end of the casing in a second direction and rotatable about an axis extending in a third direction. The casing includes: a recessed portion recessed from an outer surface of the casing toward the developing roller; a first wall extending in the second direction; and a first boss positioned inside the toner chamber. The recessed portion is positioned at a center in the third direction of another end of the casing in the second direction. The first wall and the second wall form the toner chamber. The first boss extends from the first wall to be connected to the second wall.

A developer container includes a body, an agitating bar, and an agitating film. The body includes a bottom plate; a first side wall; a second side wall facing the first side wall; a developer chamber defined by the bottom plate, the first side wall, and the second side wall, the developer chamber storing developer; and an opening formed in the bottom plate to allow the developer chamber to communicate with an outside of the developer chamber and allow the developer to be supplied from the developer chamber to the outside of the developer chamber. The agitating bar is configured to rotate to agitate the developer stored in the developer chamber. The agitating film is attached to the agitating bar and configured to, when rotation of the agitating bar stops, stop in a state where the agitating film abuts the first side wall and the second side wall.

A developing apparatus includes: a housing that accommodates developer and has a plurality of constituent parts; a vibrator that vibrates parts, which are two or more of the plurality of the constituent parts and to which scattered toner may adhere, as vibrated portions; an adjuster provided for at least one of the vibrated portions and the vibrator so as to adjust and match natural frequencies of the two or more of the vibrated portions; and a hardware processor that controls the vibrator.

A developing apparatus includes: a housing that accommodates developer and has a plurality of constituent parts; a vibrator that vibrates parts, which are two or more of the plurality of the constituent parts and to which scattered toner may adhere, as vibrated portions; an adjuster provided for at least one of the vibrated portions and the vibrator so as to adjust and match natural frequencies of the two or more of the vibrated portions; and a hardware processor that controls the vibrator.

A stirring/conveying member has a rotary shaft rotatably supported in a powder container, a first helical blade formed on the circumferential surface of the rotary shaft and conveying powder in the axial direction by the rotation of the rotary shaft, and a second helical blade formed on the circumferential surface of the rotary shaft to overlap the forming region of the first helical blade, spiraling in the opposite phase to the first helical blade, and having a smaller radial height than the first helical blade. The first helical blade crosses the second helical blade at least at one place in one turn about the rotary shaft. At least one of the radial heights of the first and second helical blades equals zero at the intersection of the first and second helical blades.