Hinge mechanism of portable phone

摘要

In a portable phone including a phone body, a cover, and a hinge mechanism adapted to mechanically couple the cover to the phone body, the hinge mechanism including at least one hinge module mounted to the phone body and adapted to hinge the cover with respect to the phone body for opening and closing the cover. The hinge module includes a hinge housing having a bottom wall, and a pair of opposite lateral end walls spaced from each other in a rotating axis direction, one of the lateral walls having a hole, the hinge housing being completely opened at an upper end thereof and also having a pair of opposite longitudinal end walls spaced from each other in a direction normal to the rotating axis direction, a hinge shaft having a mountain-shaped portion provided with a pair of opposite cam surfaces at one longitudinal portion thereof and a shaft portion at the other longitudinal portion thereof, the hinge shaft being arranged in the hinge housing in such a fashion that the shaft portion extends through the hole of the hinge housing outwardly from the hinge housing and is coupled to the cover, so that it rotates together with the cover, a hinge cam arranged in the hinge housing in such a fashion that it faces the hinge shaft in the rotating axis direction, the hinge cam having, at one longitudinal portion thereof, a pair of mountain-shaped protrusions respectively provided with facing cam surfaces defining a valley-shaped portion therebetween, and, at the other longitudinal portion thereof, a mounting protrusion extending in the rotating axis direction, the hinge cam engaging at the valley-shaped portion with the mountain-shaped portion of the hinge shaft in such a fashion that it slides straight in the rotating axis direction in accordance with the rotation of the hinge shaft, and a hinge spring arranged in the hinge housing in the rotating axis direction to urge the hinge cam toward the hinge shaft in the rotating axis direction.