Patent ID: 8220361

Claim:
A rotary knob assembly of a portable electronic device, comprising: a fixed raised boss, having a boss cavity, raised from a control top surface of the portable electronic device, the control top surface comprising one or more controls for the portable electronic device; and a knob located within the fixed raised boss, the knob comprising: a rotary switch stem coupled to a rotary switch therein; a core member that axially resides within the boss cavity; and an outer over-molded portion which is integrally over-molded as one piece onto the core member; wherein the fixed raised boss includes an outer circumference and an inner circumference, the fixed raised boss forming a knob-boss interface with the knob, where at least a portion of the core member resides within the inner circumference and within the boss cavity, and the outer over-molded portion resides within the outer circumference but outside the boss cavity, the rotary knob assembly transferring impacts received at the knob to the fixed raised boss through the boss-knob interface while isolating the rotary switch.