Image forming apparatus with detachable toner container

An image forming apparatus comprising:

• a toner container having a toner discharge port through which toner within a container body is discharged;
• a container mounting portion configured to detachably mount the toner container;
• a lever member displaceably provided to the toner container;
• a container locking mechanism configured to lock the toner container at a mounting position in the container mounting portion when the lever member is operated from a first operation position to a second operation position in a state where the toner container is located at the mounting position;
• a locking member configured to be displaceable between a lever locking position at which the locking member is engaged with the lever member to lock the lever member at the second operation position and a lever releasing position at which the locking member is retracted from the lever locking position to unlock the lever member locked at the second operation position;
• a drive portion configured to provide driving force to the locking member;
• a remaining amount detection portion configured to detect a remaining amount of the toner within the container body;
• and
• a locking control portion configured to control the drive portion to displace the locking member to the lever locking position when the remaining amount of the toner detected by the remaining amount detection portion is equal to or greater than a predetermined amount, and to control the drive portion to displace the locking member to the lever releasing position when the remaining amount of the toner detected by the remaining amount detection portion is less than the predetermined amount, wherein
• the container mounting portion has a drive transmission mechanism including an input portion configured to receive operating force inputted when the lever member is operated in the state where the toner container is located at the mounting position, and
• the container locking mechanism includes a first connection portion that is provided to the toner container so as to be rotatable in accordance with displacement of the lever member and that is configured to connect to the input portion when the toner container is located at the mounting position and the lever member is located at the first operation position, and to come into engagement with the input portion in a direction in which the toner container is detached, by rotating in accordance with a locking operation performed when the lever member is operated from the first operation position to the second operation position, to thereby lock the toner container at the mounting position.