Abstract: An electronic instrument includes a rotary switch disposed to be rotated by the thumb of a user while the housing is gripped in the hand of the user. The rotary switch has a knob protruding from the front face of the instrument with a rotational axis centered approximately midway between longitudinal side walls of the housing. The rotary switch has a light rotational tension requiring a force of less than 300 grams for easy rotation by the thumb. Elastomeric over-molded side strips are attached along the longitudinal side walls and an elastomeric over-molded knob is attached along an indicator projection portion of the knob.

Abstract: A variable focus optic module is provided with a housing, a lens assembly, and a protrusion and recess system. The lens assembly is movably disposed in operable relationship with the housing. The protrusion and recess system includes at least one protrusion disposed on one of the housing and the lens assembly, and at least one recess disposed in the opposing one of the lens assembly and the housing. The at least one protrusion operatively engages the at least one recess to control axial movement of the lens assembly, in discrete steps relative to the housing.

Abstract: An electronic instrument includes a stand having a first rigid leg portion pivotally attached to a housing via a first hinge. The stand further comprises a second rigid leg pivotally attached to the first rigid leg portion via a second hinge. A first pivot control mechanism secures the stand in a closed position. A second pivot control mechanism secures the stand in a first open position. A third pivot control mechanism holds the first rigid leg portion at a bent angle relative to the second rigid leg portion to secure the stand in a second open position. A fourth pivot control mechanism secures the stand in a third open position. The stand further comprises a section for hanging the electronic instrument when the stand is in the third open position.