Patent ID: 8103320

Claim:
A rotary-type hinge apparatus for a portable terminal comprising: a main body; a folder; a connection member for coupling the main body with the folder, wherein the connection member is coupled to the main body by a first hinge apparatus and the folder is coupled to the connection member by a second hinge apparatus; housing means mounted in the connection member; cam means including a center cam unit having at least three cam faces and a pair of side cam units for moving towards or away from the center cam unit according to a rotation of the folder in order to maintain close contact with selected cam faces, and adjusting a rotation angle of the folder by cam movement with the selected cam faces while being accommodated in the housing means, wherein protrusions extending in the longitudinal direction are provided between the cam faces for stably supporting a close contact state between the cam faces and the pair of side cam units; elastic bodies for causing the pair of side cam units to closely contact the selected cam faces while being accommodated in the housing means; and an axis extending in a longitudinal direction of the center cam unit.