Image forming apparatus

An image forming apparatus comprising:

• a developing device including,
• a photosensitive unit having a photoreceptor, and
• a developing unit having a developing roller to contact and separate from the photoreceptor;
• a pressing assembly including,
• a pressing unit coupled movable to press the developing roller separated from the photoreceptor to contact the photoreceptor, and
• an operating unit provided in linkage with the pressing unit to be movable between,
• an operating position to press the developing unit to cause the developing roller separated from the photoreceptor to contact the photoreceptor, and
• a release position to cause the developing roller in contact with the photoreceptor to separate from the photoreceptor.

An image forming apparatus comprising:

• a developing device including,
• a photoreceptor on which an electrostatic latent image is to be formed, and
• a developing roller to contact the photoreceptor, to supply a developer, and to be detachable from the photoreceptor;
• a light scanning unit including a light source to generate light to form an electrostatic latent image by applying the light onto the photoreceptor through a window;
• a shutter unit to rotate to open and close the window;
• a movable pressing unit coupled to the shutter unit and movable to press the developing roller separated from the photoreceptor to contact the photoreceptor and guide a rotation of the shutter unit to open the window, or release the developing roller in contact with the photoreceptor to separate from the photoreceptor and guide a rotation of the shutter unit to close the window;
• and
• a cover unit to couple to a side of the developing device to press the pressing unit to link with the shutter unit to rotate the shutter unit to open the window, and detach from the side of the developing device to unlink from the pressing unit to cause rotation of the shutter unit to close the window.