Hinge assembly with vertical torque engine

A hinge assembly comprising:

• a first shaft;
• a band torque engine rotatably coupled to a first end of the first shaft;
• a vertical torque engine comprising:
• a second shaft;
• a vertical shaft holder to hold the second shaft perpendicular to the first shaft, wherein the first shaft is rotatably coupled to the vertical shaft holder;
• a spring mounted on the second shaft;
• first and second gear wheels fixedly mounted to the first shaft and the second shaft, respectively, to rotate the second shaft during rotation of the first shaft;
• and
• a cam member fixedly mounted on the second shaft between the spring and the vertical shaft holder, the cam member having a protruding feature engaging with a protruding feature of the vertical shaft holder such that the spring provides a vertical frictional torque during rotation;
• and
• a display bracket to fixedly hold a second end of the first shaft.

An electronic device comprising:

• a first housing;
• a second housing;
• and
• a hinge assembly pivotally coupled to the first housing and the second housing along an axis, wherein the hinge assembly comprises:
• a first shaft;
• a band torque engine having at least one bearing portion rotatably coupled to the first shaft and a flange portion fixedly engaged with the first housing;
• a vertical torque engine fixedly coupled to the band torque engine, the vertical torque engine having an opening to rotatably engage with the first shaft;
• and
• a display bracket including an adaptor portion fixedly coupled to the first shaft and a flange portion fixedly engaged with the second housing, wherein the band torque engine provides a frictional torque and the vertical torque engine compressively engages with the first shaft to provide a vertical frictional torque during rotation of the second housing relative to the first housing;
• wherein the vertical torque engine comprises:
• a second shaft disposed perpendicular to the first shaft;
• a spring mounted to the second shaft such that the spring and the second shaft are to compressively engage with the first shaft to provide the vertical frictional torque;
• a vertical shaft holder having a first opening to rotatably receive the first shaft and a second opening to rotatably receive the second shaft perpendicular to the first shaft;
• the spring mounted on the second shaft;
• first and second gear wheels fixedly coupled to the first shaft and the second shaft, respectively, to rotate the second shaft during rotation of the first shaft;
• and
• a cam member fixedly coupled to the second shaft between the spring and the vertical shaft holder, the cam member having a protruding feature engaging with a protruding feature of the vertical shaft holder, wherein the spring, the second shaft, and the cam member are to provide the vertical frictional torque during the rotation.