Physical knob for touch screen operation

Abstract

This disclosure is directed to a physical knob for touch screen operation having a cylindrical seat, a conductive sleeve, an insulative bracket, a conductive rod and an elastic conductive assembly. A triggering opening is defined at one end of the cylindrical seat. The conductive sleeve rotatably sleeves the cylindrical seat. The insulative bracket is arranged in the conductive sleeve to be rotatable with the conductive sleeve. The insulative bracket has an eccentric shaft seat. A transverse channel is defined in the insulative bracket. The transverse channel is communicated between the eccentric shaft seat and an external surface of the insulative bracket. The conductive rod arranged on the eccentric shaft seat has one end connected to the eccentric shaft seat with a telescoping connection to be movable relative to the insulating bracket along an axial direction of the conductive rod and another end located in the trigger opening. An elastic member is clamped between the conductive rod and the insulative bracket, and the elastic member is arranged parallel to the axial direction of the conductive rod. At least one insulative element is disposed on an external surface of the conductive rod corresponding to the transverse channel. The elastic conductive element is arranged in the transverse channel to abut against an internal surface of the conductive sleeve and the external surface of the conductive rod. When the conductive sleeve is moved axially relative to the cylindrical seat, the elastic conductive element may press on the external surface of the conductive rod and meanwhile move through the insulative element.

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