Patent ID: 6396385
Filing Date: 2002-05-28
Classification: H01C

Abstract:
A variable resistor comprisinga case having a reception space, a slider fixed in the bottom of the reception space of the case, a rotor rotatably received in the reception space of the case, a resistor substrate having a resistor formed on the underside thereof and slidable in contact with the slider, and attached to the underside of the rotor, and an O ring performing the seal between the inner peripheral surface of the reception space of the case and the outer peripheral surface of the rotor, said rotor having a step portion formed in the outer peripheral surface on the underside thereof with the lower-side portion of the step portion having a short diameter, said O ring being fitted onto the short diameter portion of the step portion, the whole or a part of said resistor substrate being formed so as to have a diameter longer than that of the short diameter portion of the step portion of the rotor, and said resistor substrate being fixed to the underside of the rotor whereby the O ring is held between the step portion of the rotor and the resistor substrate.