Patent ID: 8688008

Claim:
An image forming apparatus cartridge comprising: a casing; a developer roller having an axis L 1 , the developer roller being rotatably supported in the casing to permit rotation about the axis L 1 ; a first gear connected to the developer roller; a second gear in meshing engagement with the first gear; and a coupling member having an axis L 2 , the coupling member having (i) a first end portion connected to the second gear and operatively connected with the developer roller so as to be capable of transmitting a rotational force to the developer roller via the first and second gears, (ii) a second end portion having a recess formed therein and including at least two projections provided at diametrically opposed positions, and (iii) a connecting portion connecting the first end portion and the second end portion, wherein the coupling member is movable between a first position in which the axis L 2 of the coupling member is substantially parallel to and offset from the axis L 1 of the developer roller, and a second position in which the axis L 2 of the coupling member is inclined with respect to the axis L 1 of the developer roller, and wherein a maximum angle of inclination of the axis L 2 of the coupling member with respect to the axis L 1 of the developer roller is about 20 degrees to about 60 degrees.