Patent ID: 7949287

Claim:
A developer cartridge comprising: an outer barrel member; an inner barrel member rotatably provided with respect to said outer barrel member; and a regulating member rotatably provided with respect to said inner barrel member, said regulating member including a first engaging portion and a second engaging portion, wherein said inner barrel member includes a first to-be-engaged portion that engages said first engaging portion, and further includes an operating member, wherein said outer barrel member includes a second to-be-engaged portion that engages said second engaging portion, wherein said first engaging portion and said first to-be-engaged portion are configured to define a position of the regulating member by engagement between said first engaging portion and said first to-be-engaged portion; wherein, when said first engaging portion and said first to-be-engaged portion engage each other, and engagement between said second engaging portion and said second to-be-engaged portion is released, said inner barrel member is rotatable together with said regulating member with respect to said outer barrel member, and wherein, when engagement between said first engaging portion and said first to-be-engaged portion is released, and engagement between said second engaging portion and said second to-be-engaged portion is released, said regulating member is rotatable with respect to said inner barrel member.