Patent ID: 8045901

Claim:
A toner supply container detachably mountable to an electrophotographic image forming apparatus having a hollow cylindrical driving member that has a slot formed at a peripheral portion thereof, 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) an extended portion extended from the one axial end portion of said toner discharging portion in the axial direction, said extended 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, said extended portion including: iii-i-i) an engaging projection provided at a free end of said extended portion, said engaging projection configured and positioned to (a) displace in an inward direction with said extended portion as said engaging projection enters the hollow cylindrical driving member and (b) engage with the slot of the hollow cylindrical driving member when said extended portion elastically restores in an outward direction, said engaging projection including: iii-i-i-i) a tapered surface portion configured and positioned to receive a force for displacing in the inward direction with said extended portion as said engaging projection enters the hollow cylindrical driving member, said tapered surface portion being away from the axis of said container main body toward said container main body; and iii-i-i-ii) a side surface portion capable of being abutted in a circumferential direction of the hollow cylindrical driving member by at least a portion of an 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.