Hinge mechanism with single hand operation

A hinge mechanism for joining a flip cover to a main body of a foldable device, comprising:

• a shaft having an outer screw thread on one end thereof;
• a rotating cam having an inner screw thread and defining at least one latching groove;
• a first elastic element;
• a sleeve including a latching block;
• a second elastic element;
• an anchoring block defining a first hole and a second hole;
• and
• a button having a post;
• wherein the shaft extends through the rotating cam, the first elastic element, the sleeve, the second elastic element and the first hole of the anchoring block, the outer screw thread of the shaft engages with the inner screw thread of the rotating cam, opposite ends of the first elastic element respectively abut against the shaft at the outer screw thread thereof and one end of the sleeve at the latching block, opposite ends of the second elastic element respectively abut against the driven cam and the anchoring block, the latching block of the sleeve is slidably received in said latching groove of the rotating cam, and the post of the button extends through the second hole of the anchoring block and abuts against an opposite end of the sleeve.

A hinge mechanism for joining components of an electronic device, comprising:

• a shaft interconnected with one of components of an electronic device to move together therewith;
• a rotating cam interconnected with another of said components to move together therewith, said rotating cam engagable with said shaft and linearly movable along said shaft and rotarily movable about said shaft during engagement of said shaft and said rotating cart;
• and
• a sleeve reachable to said rotating cam and movable between a first position thereof to release said rotating cam and allow said rotating cam to linearly and rotarily move relative to said shaft, and a second position thereof to confine movement of said rotating cam;
• wherein said shalt engages with said rotating cam via an outer screw thread thereof so as to guide said movement of said rotating cam by means of said outer screw thread.