Toner cartridge mounting structure, toner cartridge, and image forming apparatus

A toner cartridge mounting structure comprising:

• a toner cartridge having:
• a toner accommodating portion for accommodating toner,
• a toner supplying opening through which the toner in the toner accommodating portion is supplied,
• a supplying opening shutter that slidably moves and that has a first opening that is able to be substantially aligned with the toner supplying opening to form an opening with the toner supplying opening, and
• a first biasing member biasing the supplying opening shutter in the closing direction thereof;
• and
• a developing member having:
• a toner receiving opening, the toner receiving opening being lower than the toner supplying opening,
• a receiving opening shutter that has a second opening that is able to be substantially aligned with the toner receiving opening to form an opening with the toner receiving opening, and that is pressed with the supplying opening shutter by the operation of mounting the toner cartridge in an apparatus body such that the receiving opening shutter slidably moves,
• a second biasing member biasing the receiving opening shutter in the closing direction thereof, and
• an abutting member that abuts the receiving opening shutter so that the second opening is substantially aligned with the toner receiving opening, and that regulates the sliding movement of the receiving opening shutter.

A toner cartridge comprising:

• a toner accommodating portion for accommodating toner;
• a toner supplying opening through which the toner in the toner accommodating portion is supplied;
• and
• a supplying opening shutter for opening and closing the toner supplying opening,
• when the toner cartridge is mounted in an apparatus body, the toner supplying opening being higher than a toner receiving opening of a developing member of the apparatus body, and the supplying opening shutter being opened after a receiving opening shutter for opening and closing the toner receiving opening is opened by the operation of mounting the toner cartridge in the apparatus body.