Patent ID: 7440782

Claim:
A hinge device for a rotation type mobile phone including a main housing, and a folder having a main display device and rotatable around a first hinge axis extending in a direction perpendicular to a length of the main housing, said hinge device comprising: a connection member rotatably connecting the folder to the main housing, the connection member coupled to the folder so that the folder rotates about a second hinge axis perpendicular to the first hinge axis between a first position and a second position, the connection member having a sub-display device exposed at the first and second positions; a first hinge member; a second hinge member connected to the first hinge member in such a manner that allows and restricts the rotation of the second hinge member; a swing washer interposed between the first and second hinge members to rotatably connect the second hinge member to the first hinge member and providing an elastic force acting to rotate the folder; and a swing bush engaged into the first hinge member sequentially connected to the swing washer and the second hinge member.