Patent ID: 7596358

Claim:
A mobile radio communication apparatus, comprising: a first housing; a second housing foldable over said first housing; a hinge part that foldably connects said second housing to said first housing around a rotational center axis, the hinge part including a one touch opening part that automatically opens said second housing, relative to said first housing around said rotational center axis in a non-stop motion, from a folded state by a callable angle that enables a user to call without further opening the second housing, a free stop part that maintains the second housing at an angle different from the callable angle relative to the first housing when the second housing is unfolded relative to the first housing, and an auxiliary rotational part that rotates said second housing around an orthogonal shaft orthogonal to the rotational center axis of said hinge part; and a flexible printed circuit board wound around the orthogonal shaft, said flexible printed circuit board electrically connecting said first and second housings to each other, wherein the hinge part further includes a pair of cams and a spring that applies a compression force to the pair of cams, the cams being commonly used for the one touch opening part and the free stop part, both cams being engaged with each other and rotating together in unfolding the second housing by the one touch opening part, and one of the pair of cams being fixed relative to the other of the pair of cams due to the compression force when the free stop part operates.