Patent ID: 6941093

Claim:
A photoreceptive unit and transfer unit replacement system of a printer having a photoreceptive unit and a transfer unit disposed in a frame of a main body, comprising: a door opening and closing an entrance formed above a portion of the main body where the photoreceptive unit and the transfer unit are installed in the main body of the printer; a first guide rail provided at the frame of the main body to guide the photoreceptive unit which enters the main body through the entrance and descends; a second guide rail provided at the frame to guide the transfer unit which enters the main body through the entrance and descends; and a locking unit locking and unlocking the photoreceptive unit and the transfer unit according to an operation of opening and closing the door, the locking unit having a locking lever rotatably installed at the frame and having a first locking portion, wherein each of the photoreceptive unit and the transfer unit includes a second locking portion, and wherein the first locking portion is locked by the second locking portion.