Abstract: A quasifixed variable resistor includes a resistor substrate with a resistor mounted thereon, a stopper plate rotatably retained about an axis on the substrate, and a knob having a slider fixed to an end of the stopper plate, the slider, sliding on the resistor. In a flat portion located at a bottom end of a cylindrical section of the stopper plate, a screwdriver engaging section having an adjusting groove is folded and is integrally formed therein. A wing piece branched by the adjusting groove is tapered in a direction toward the flat portion and a tip end of the screwdriver can be engaged with an end portion of the wing piece for adjustment.

Abstract: A rotary electric component such as a semifixed variable resistor comprises an insulating substrate having a shaft hole and a slot communicating with the shaft hole, a resistor mounted on the insulating substrate surrounding the shaft hole, a pair of electrodes mounted on the insulating substrate and connected to the resistor at ends thereof, the electrodes being positioned one on each side of the slot and prevented by the latter from shortcircuiting therebetween, a pair of terminals mounted on the insulating substrate and connected to the electrodes, respectively, a shaft rotatably mounted in the shaft hole and having a movable contact held in sliding contact with the resistor, and a body of synthetic resin filled in the slot. The body of synthetic resin is fixedly mounted on the insulating substrate and may include a support spacer disposed around the shaft hole and a protective cover covering attachment end portions of the terminals.

Abstract: A rotary electric component such as a semifixed variable resistor comprises an insulating substrate having a shaft hole, a resistor mounted on the insulating substrate surrounding the shaft hole, a pair of electrodes mounted on the insulating substrate and connected to the resistor at ends thereof, a pair of terminals mounted on the insulating substrate and connected to the electrodes, respectively, a shaft rotatably mounted in the shaft hole and having a movable contact held in sliding contact with the resistor, a cover mounted on the shaft over the insulating substrate and covering the movable contact, the cover having a skirt spaced from the insulating substrate by a gap, and a body of synthetic resin mounted on the insulating substrate and a portion formed as a dust wall covering the gap.