FIELD: image forming devices.
SUBSTANCE: invention relates to a developing device used in an electrophotographic image forming device and a coupling element used in an electrophotographic image forming device. Disclosed group of inventions includes variants of cartridges of image forming device. At that, the image forming device cartridge comprises: a housing, a developer contained inside the housing, a developing roller having an axis L1, a developing roller is supported in the housing with possibility of rotation, to be able to rotate about axis L1, developer supply roller, removing developer from surface of developing roller and supplying developer to surface of developing roller, and coupling element having axis L2, around which the coupling member can rotate, the coupling member includes (i) a first end portion operatively coupled to the developing roller and the developer supply roller, and (ii) a second end portion for receiving a rotary force, the second end portion includes at least two projections which are at least partially outside the housing, each of at least two projections is open for axis L2, wherein second end part has outer surface and for at least part of outer surface maximum distance from axis L2 to most external surface along line perpendicular to axis L2 increases with distance increase along axis L2 from first end part, and wherein the coupling member is movable between (i) a first position in which the axis of the clutch member L2 is substantially parallel and offset from the developing roller axis L1, (ii) a second position in which the axis L2 of the clutch member is inclined relative to the position of the axis L2 when the clutch member is in the first position, and (iii) the third position in which the axis L2 of the clutch member is inclined relative to the position of the axis L2, when the clutch element is in the first position in the direction opposite to the coupling element direction, inclined in the second position.
EFFECT: providing a mechanism for moving the coupling on the side of the developing device to ensure uniform rotation of the developing roller.
38 cl, 78 dwg
