Patent ID: 6909355

Claim:
An illumination-type rotary variable resistor comprising: (a) a housing including: a round bottom plate; a cylinder attached to an inner radius of the bottom plate, and protruding in a first direction along a center axis of the cylinder, and a cylindrical outer wall surrounding the bottom plate, and protruding in the first direction; (b) an annular insulating substrate housed in the housing facing the bottom plate, the annular Insulating substrate being provided with a resistor film and an LED conductive film on a surface which is facing in the first direction; (c) an insulating resin operating knob including: a cylindrical operating member having a through hole passing through in the first direction, and being rotatably fitted with an outer radius of the cylinder, and a flange attached to the operating member at a side of a second direction being an opposite direction to the first direction, the flange being provided with a resistor slider and an LED slider on a face which is facing in the second direction; (d) a cover attached to the housing and covering the flange; and (e) a surface-mount LED fitted at an end of the through hole in the second direction; wherein the resistor slider slidably and resiliently contacts the resistor film, a first contact of the LED slider resiliently contacts an electrode of the surface-mount LED, and a second contact of the LED slider slidably and resiliently contacts the LED conductive film; wherein the resistor film is formed annularly centering on a center axis of the annular insulating substrate, a cross point of a line passing the through hole along the first direction and the insulating substrate exists between an inner-radius end and an outer-radius end of the resistor film and the LED conductive film is disposed on the outer radius of the resistor film concentrically.