Developer supply container and image forming apparatus

1. A developer supply container capable of supplying a developer to a portion, to be supplied with the developer, of a main assembly of an image forming apparatus by being mounted into the image forming apparatus main assembly to permit transmission of a driving force between said developer supply container and the image forming apparatus main assembly, said developer supply container comprising:

a developer discharge opening to be disposed opposite to a developer receiving opening provided to the image forming apparatus main assembly when said developer supply container is mounted into the image forming apparatus main assembly;

an operation member capable of performing a moving operation in a mounted state of said developer supply container;

a first transmitting portion, provided to said operation member, for transmitting a driving force for opening and closing said developer discharge opening;

a second transmitting portion for transmitting a driving force to a main assembly shutter member, provided to the image forming apparatus main assembly, for opening and closing the developer receiving opening; the driving force having been transmitted from said first transmitting portion when said developer supply container is mounted into the image forming apparatus main assembly through a relay gear train, for opening and closing the developer receiving opening, provided to the image forming apparatus main assembly and provided with at least a plurality of gears which have a common rotational axis and are different in number of tooth; and

a container-side abutting portion for abutting against a gear-side abutting portion provided to at least one gear of the relay gear train;

wherein said container-side abutting portion abuts against the gear-side abutting portion to rotate the relay gear train when said developer supply container is mounted into the image forming apparatus main assembly.

2. A container according to claim 1 , wherein said container-side abutting portion abuts against the gear-side abutting portion to rotate respective gears of the relay gear train toward their initial positions when said developer supply container is mounted into the image forming apparatus main assembly.

3. A container according to claim 1 , wherein said developer supply container further comprises a lock portion for locking said operation member, and a locked state is released by mounting said developer supply container into the image forming apparatus main assembly.

4. A container according to claim 3 , wherein said operation member is provided with a portion to be guided by a guide portion provided to the image forming apparatus main assembly, and the portion to be guided is guided by the guide portion in a state in which the lock by said lock portion is released.

5. A container according to claim 4 , wherein the portion to be guided is started to be guided before the locked state by said lock portion is released and is released from the guide portion before connection of said first transmitting portion with the relay gear train is completed.

6. A container according to claim 1 , wherein said developer supply container further comprises a container shutter member for opening and closing said developer supply opening; and an engaging portion, provided to said container shutter member, for being engaged with said apparatus shutter member by mounting said developer supply container into the image forming apparatus main assembly, and

wherein said container shutter member is capable of being opened and closed in conjunction with the apparatus shutter member and being opened and closed by receiving the driving force from the relay gear train.

7. A container according to claim 1 , wherein said developer supply container is mounted into the image forming apparatus main assembly in a direction resistant to a reaction force exerted from the relay gear train on said first transmitting portion during transmission of the driving force.