Adjustable resistor

可变电阻器，具有：可自由往复移动的可移动部件上形成的电阻体和安装在与上述可移动部件对置固定的固定部件上的并在上述电阻体上滑动的滑动子；上述电阻体具有沿上述可移动部件的往复移动方向延伸的电气上互相独立的第一、第二和第三电阻体，连接在上述第一和第二电阻体的各一端的第一电阻图形；连接上述第二和第三电阻体的另一端部之间的第二电阻图形；上述滑动子由在第一、第二和第三电阻体上分别滑动接触的第一、第二和第三滑动子构成。 There is provided a variable resistor comprised of a resistor formed at a movable member arranged to be reciprocatable, and a slider element attached to a fixing member fixed in opposition to the movable member, slidingly contacted with the resistor. The resistor has the first resistor, the second resistor and the third resistor extending in a reciprocating direction of the movable member and electrically independent from each other, a first resistor pattern having one end of each of the first resistor and the second resistor connected to each other, a second resistor pattern having the other ends of the second resistor and the third resistor. The slider element is comprised of the first slider element, the second slider element and the third slider element slidingly contacted with the first resistor, the second resistor and the third resistor. When the movable member is moved in the direction of arrow A, a resistance value between the first and second slider elements is increased and a resistance value between the second slider element and the third slider element is decreased, and in turn when the movable member is moved in a direction of an arrow B, a resistance value between the first slider element and the second slider element is decreased and a resistance value between the second slider element and the third slider element is increased.