Pick-up unit and an image forming apparatus having the same

An image forming apparatus, comprising:

• an image forming unit having a photoconductive medium for forming an electrostatic latent image, and a development unit for developing the electrostatic latent image of the photoconductive medium;
• a transmission unit having a paper transmission path connecting the image forming unit with a paper feeding cassette stacking a plurality of papers therein;
• and
• a paper pick-up unit for picking up a sheet of paper stacked in the paper feeding cassette to enter the paper to the paper transmission path, the paper pick-up unit including
• an elliptical pick-up rubber having a first arcuate part and a second arcuate part, the first and second arcuate parts being symmetrical to each other and adapted to contact a paper;
• a pick-up housing supporting the pick-up rubber attached around a circumference of the pick-up housing, and having a first shaft opening and a second shaft opening formed opposite to each other in the pick-up housing and disposed eccentrically with respect to a center of the pick-up housing;
• and
• a pick-up shaft engaged with one of the first shaft opening and the second shaft opening of the pick-up housing, and being adapted to rotate such that the rotation of the pick-up shaft causes rotation of the pick-up housing.