Cartridge and image forming device

An image forming device comprising:

• a main body;
• and
• a cartridge configured to be mounted in and removed from the main body, the cartridge comprising:
• a casing including a developer accommodation part configured to accommodate developer therein;
• an agitator defining a first rotational axis extending in an axial direction and configured to rotate about the first rotational axis and agitate the developer within the developer accommodation part;
• a receiving member configured to rotate about a second rotational axis upon receipt of a drive force inputted thereto;
• a first drive-force transmission member configured to rotate about a third rotational axis upon receipt of the drive force from the receiving member;
• and
• a second drive-force transmission member configured to contact the first drive-force transmission member and receive the drive force therefrom, the second drive-force transmission member being configured to rotate about the first rotational axis together with the agitator, the first rotational axis being positioned closer to the second rotational axis than the third rotational axis is to the second rotational axis when projected in the axial direction of the agitator,
• wherein, when the cartridge is mounted in the main body, the first drive-force transmission member is configured to transmit the drive force to the second drive-force transmission member at a drive-force transmission portion, the drive force being oriented toward vertically below relative to the second drive-force transmission member at the drive-force transmission portion.