Patent ID: 7970321

Claim:
A toner supply container detachably mountable to an assembly of an electrophotographic image forming apparatus having a hollow cylindrical driving member that has a slot formed therein, which slot extends in a circumferential direction and defines a plurality of interior surfaces of the hollow cylindrical driving member, said toner supply container comprising: i) a container main body configured to contain toner and rotatable about an axis thereof; ii) a toner discharging portion projected from one axial end portion of said container main body in an axial direction of said container main body and integrally rotatable with said container main body, said toner discharging portion having a cross-sectional area which is smaller than a cross-sectional area of said container main body, and having an opening provided at a peripheral portion thereof and configured to permit discharge of the toner contained in said container main body; and iii) a coupling member provided at one axial end portion of said toner discharging portion and configured and positioned to receive a rotational drive force, said coupling member including: iii-i) a supporting portion provided on said toner discharging portion, said supporting portion being elastically displaceable in an inward direction toward the axis of said container main body and elastically restorable in an outward direction away from the axis of said container main body; and iii-ii) an engaging portion provided at a free end of said supporting portion, said engaging portion configured and positioned to (a) displace in an inward direction with said supporting portion as said engaging portion enters the hollow cylindrical driving member and (b) engage with the slot of the hollow cylindrical driving member when said supporting portion elastically restores in an outward direction, said engaging portion including: iii-ii-i) an outer surface portion configured and positioned to receive a force for displacing in the inward direction with said supporting portion as said engaging portion enters the hollow cylindrical driving member, said outer surface portion being away from the axis of said container main body toward said container main body; and iii-ii-ii) a rotational force receiving portion capable of being abutted in a circumferential direction of the hollow cylindrical driving member by at least a portion of a first interior surface of the hollow cylindrical driving member defined by the slot to receive a rotational drive force from the hollow cylindrical driving member to rotate said container main body with said toner discharging portion.