Toner supply apparatus, toner storage container, and image forming apparatus including same

A toner storage container for supplying toner to a development device that has a first shaft that rotates about a first rotation axis, the toner storage container comprising

• a second shaft that rotates about a second rotation axis extending along the first rotation axis;
• and
• one of a first joint or a second joint of a shaft connection mechanism including a first joint and a second joint, the first joint and the second joint engaging to enable connection of the first shaft and the second shaft in a direction along the first rotation axis and the second rotation axis, and enabling transmission of rotation between the first shaft and the second shaft;
• wherein
• the first joint having a first main body being substantially incapable of rotation with respect to either one of the first shaft or the second shaft, a first engagement member biased from the first main body towards the second joint, and a biasing member for biasing the first engagement member;
• the second joint having
• a second main body being substantially incapable of rotation with respect to the other of the first shaft or the second shaft;
• and
• an engaging recessed portion being provided on the second main body, opening towards the first joint, enabling accommodation of the first engagement member of the first joint and engaging with the accommodated first engagement member in a configuration that is substantially incapable of rotation;
• and
• when the first engagement member is accommodated in the engaging recessed portion and the first rotation axis is not aligned with the second rotation axis, the first engagement member inclines relative to the first rotation axis or the second rotation axis and can engage with the engaging recessed portion in that configuration.