Hinge assemblies with elastic members

A dual-axis hinge assembly comprising:

• first and second brackets to connect to first and second housings of an electronic device, respectively, wherein the first bracket includes a recess portion between first and second edges;
• a first shaft coupled to the first bracket:
• a second shaft coupled to the second bracket;
• a torque engine connected to the first shaft and the second shaft;
• a synchronous gear unit disposed between the first shaft and the second shaft;
• and
• an elastic member rotatably mounted on the first shaft, wherein the elastic member comprises:
• a fixed end;
• and
• a movable end positioned in the recess portion, wherein the elastic member is in a free state while moving in the recess portion and in an energy storage state when engages with the first edge or the second edge during rotation of the first bracket relative to the second bracket.

An electronic device comprising:

• first and second housings;
• and
• a hinge assembly to pivotally connect the first and second housings, the hinge assembly comprising:
• first and second brackets fixedly engaged with the first and second housings, respectively, wherein the first bracket comprises a first recess portion between first and second edges;
• first and second shafts coupled to the first and second brackets respectively;
• and
• a first elastic member rotatably counted n the first shaft, the first elastic member comprising:
• a fixed end;
• and
• a movable end extended into the first recess portion, wherein the movable end is to slide along a surface of the first recess portion during rotation of the first housing in a first angle range and to engage with the first or second edge to generate a torsional force during rotation of the first housing in a second angle range.