Patent ID: 7644472

Claim:
A device having a hinge module, comprising: a stationary member; a rotatable member, having a bar; and a hinge module interconnecting the stationary member and the rotatable member such that the rotatable member rotates relative to the stationary member, wherein the hinge module comprising: a hollow cylinder, having a first opening and a second opening at two respective opposite ends, a cutout partially formed at the end around the second opening, and a positioning slot in an inner wall thereof, the bar of the rotatable member is restricted within the cutout of the hollow cylinder to provide rotational limitation of the rotatable member; a movable part, having a positioning convex portion, a first hole and a plurality of engraved portions, wherein the positioning convex portion is engagable with the positioning slot such that the movable part is slidable within the hollow cylinder, the engraved portions radially extending from the first hole of the movable part and being engagable with the bar of the rotatable member; a resilient part, disposed within the hollow cylinder; and a cover, fixed to the hollow cylinder to cover the first opening to secure the movable part and the resilient part within the hollow cylinder, the resilient part being disposed between the cover and the movable part so as to provide the movable part a resilient recovery force, wherein all of the engraved portions are visible through the second opening when the movable part is secured within the hollow cylinder.