Patent ID: 7245948

Claim:
A cellular phone providing wireless communication, comprising: a main body having a key pad and a hinge thereof along a folding and unfolding axis; a folder having a display displaying data received from the main body; a driving source disposed on a lower portion of the folder along the folding and unfolding axis to generate a driving force; a power transmission unit having one end coupled to the driving source and the other end coupled to the folder to transmit the driving force to folder to rotate with respect to the main body when the folder is in an open state; and a rotation controller coupled to the power transmission unit, disposed in a housing installed at the hinge of the main body in a rotating axis perpendicular to the folding and unfolding axis to automatically and/or manually rotate the folder with respect to the main body; wherein the power transmission unit comprises: a pair of bevel gears having a driving gear coupled to the driving source and a driven gear coupled to the driving gear and having a shaft fixedly coupled to the folder, wherein the power transmission unit further comprises: a fixed member disposed on outside surface of the shaft provided on the driven gear to couple the shaft to the folder, wherein the fixed member comprises: a washer having a ring shape; and a snap ring disposed on the washer to elastically press the washer.