Paper feeding apparatus for printing device

A paper feeding apparatus of a printing device comprising a tray releasably combined to a main body of the printing device for receiving paper, a guide plate movably installed in the tray according to the page size of the paper, and a page size sensing means for sensing the movement position of the guide plate and determining the page size of the paper received in the tray, wherein the page size sensing means comprises:

• a link which is pivotally installed centering around a hinge shaft provided in the tray, to one end of which the guide plate is connected, and which pivots around the hinge shaft according to the movement of the guide plate;
• a rack slidably installed in the tray, connected to the other end of the link, and sliding according to the pivot of the link;
• a driving plate which rotates, engaged with the rack and in which a plurality of marks corresponding to the page size of the paper are formed;
• and
• a sensor for sensing the marks and the page size of the paper.