Patent ID: 7168135

Claim:
The hinge mechanism of a portable phone comprising: a housing having a rotary chamber with an opened top portion and a hinge chamber formed at a side of the rotary chamber, for mechanically connecting a cover to a body; a hinge part which is installed to the hinge chamber, for opening and closing the cover; and a rotary part which is installed to the rotary chamber, for rotating the cover, wherein the rotary part includes a cylinder which opens at a lower portion and has a cylinder chamber, which has a cylinder hole formed in an upper portion thereof and an arm projected from the upper portion thereof to be combined with the cover, and which has a cylinder groove formed lengthwise thereon; a compressed spring which is installed in the cylinder chamber; a rotary slip part which has a rotary slip hole formed at a center portion thereof; a fixed slip part which has a polygonal hole formed at a center portion thereof and which has a fixed slip surface on an upper portion; and a center shaft which has a polygonal projection to be combined with the polygonal hole, and which is installed at a bottom surface of the rotary chamber to sequentially extend the polygonal hole, the rotary slip hole, the compressed spring and the cylinder hole.