ROTARY VARIABLE RESISTOR

摘要

A rotary variable resistor comprising an insulation substrate having a partial-ring form resistor layer on the surface thereof, an operational shaft rotatably supported at a central portion of the insulation substrate, a brush supporter of a rotational body disposed substantially at one tip of the operational shaft and holding a brush rotatably sliding on the resistor layer, and a cover case of an insulation mold material covering the brush and the brush supporter, the improvement is that the rotational movement of the operational shaft is effectively stopped by a protrusion disposed on the inner wall of a thick part of a plastic mold cover case and on the side of lead terminals.