US Patent 8082632 Hinge device for portable terminal having sub-housing stopper

A hinge device in a portable terminal is provided. In the hinge device, a first hinge base has a stopper protrusion at a predetermined position on an outer circumferential surface thereof. A second hinge base is rotatably engaged with an end of the first hinge base, facing the first hinge base, and fixed within a cylindrical hinge housing. The hinge housing has a stopper which pops out therefrom when the stopper contacts the stopper protrusion. The stopper restricts an angle at which a sub-housing is opened from a main housing in the portable terminal. Thus, a voice call can be conducted conveniently.