Patent ID: 7100239

Claim:
A hinge assembly for a foldable electronic device, comprising: a body drive member, including an outer screw thread at an outer periphery thereof; a cover drive member including at least one projection on a circumferential periphery thereof, a central cavity, an inner screw thread formed in the cavity, and a first end surface, the first end surface having a first flat surface and a first arcuate surface; a follower including a second end surface, and a central hole, the second end surface having a third flat surface and a second arcuate surface; and an elastic element abutting the follower; wherein the body drive member extends through the cavity of the cover drive member, the hole of the follower and the elastic element respectively, thereby integrating the hinge assembly into a complete unit, the outer screw thread of the body drive member engages with the inner screw thread of the cover drive member to guide rotary movement of the cover drive member relative to the body drive member, and the first end surface of the cover drive member abuts the second end surface of the follower under a biasing force applied by the elastic element.