Image forming apparatus

An image forming apparatus comprising:

• a body provided with an opening at a side thereof;
• a developing tray movably installed at the opening;
• a plurality of developing units mounted to the developing tray;
• a pair of frames forming opposite inner sides of the body;
• a cover pivotably installed at the body to rotate about a lower end of the cover to open and close the opening;
• and
• a pressing unit to press the developing units downward in connection with opening and closing of the cover.

An image forming apparatus comprising:

• a body provided with an opening;
• a frame disposed in the body;
• a developing tray movably installed at the frame to enter and come out of the body through the opening;
• a plurality of developing units configured to contain developing agents and detachably mounted to the developing tray, each of the developing units including a developing housing having one side facing the frame;
• a plurality of projections protruding from one of the one side of the developing housing and the frame to respectively correspond to the developing units;
• and
• a plurality of protruding portions provided at the other one of the one side of the developing housing and the frame to respectively correspond to the projections, each of the protruding portions restricting a corresponding one of the projections to limit movement of a corresponding one of the developing units.

An image forming apparatus comprising:

• a body provided with an opening and an interior frame;
• a tray movably installed at the opening;
• a unit mounted to the tray;
• and
• a seating groove provided in the frame to support an end of the unit.