Patent ID: 7619501

Claim:
A rotary variable resistor comprising: a case having a fitting hole and holding a resistive substrate, which has a resistive element and a conductive portion on its upper surface; a rotator including a disk-shaped flange provided with a first adjustment hole and a shaft protruding to a lower part of the flange, the shaft being inserted into the fitting hole of the case and rotatably attached thereto; an adjustment plate having a substantially flat annular shape with a through hole at a center thereof, in which the through hole is combined with the shaft of the rotator in a press-fitted state with a position of a second adjustment hole adjusted to a position of the first adjustment hole, the second adjustment hole being provided in a position with respect to a rotation center, which is the same as in the first adjustment hole, and having a width in the direction of rotation that is narrower than a width of the first adjustment hole; and a slider provided on a lower surface of the adjustment plate and sliding on the resistive element and the conductive portion, wherein when the rotator is rotated, the adjustment plate is rotated together with the rotator, and the through hole of the adjustment plate is combined with the shaft of the rotator in a press-fitted state in a manner in which the adjustment plate can be rotated relatively to the rotator by a load applied to the second adjustment hole from the outside at the first adjustment hole.