Patent ID: 7474866

Claim:
A coupling member of a toner supply container detachably mountable to an image forming apparatus, comprising: a hook portion which is displaceable substantially radially outwardly to establish a hooking engagement with a hole formed in a peripheral portion of a hollow driving member provided in the image forming apparatus by a relative movement between said hook portion and the driving member in a direction so as to cause an overlapping relationship therebetween, to receive a rotational force for discharging a toner in a toner containing portion of the container; a displacing force receiving portion disposed at a position closer to the toner containing portion than said hook portion with respect to the direction of overlapping, to receive, from a hollow slidable member provided in the image forming apparatus outside the driving member, a displacing force for displacing said hook portion substantially radially inwardly to permit for disengagement a relative movement between said hook portion and the driving member in a direction opposite to the direction of overlapping; and a regulation shaft receiving portion provided with a hollow cylindrical portion in which a regulation shaft disposed in a hollow portion of the driving member is insertable to regulate an inclination of the coupling member relative to the driving member by contact with said regulation shaft when said hook portion is moved away relative to the driving member in a direction opposite to the direction of overlapping in a state in which said displacing force receiving portion receives the displacing force from the slidable member.