| 摘要 |
PURPOSE:To improve the withstand current and withstand power of an operation circuit by dividing a current within said operation circuit through providing a plurality of variable resistors in parallel with each other. CONSTITUTION:When two variable resistors 95, 96 are provided in parallel with each other, a current within an operation circuit 78 can be divided to decrease arc and control heating so that the withstand current and withstand power of said operation circuit 78 is increased by twice or more. Also, because two sets of sliders 93, 94 are interlocked with each other to slide, there are parallel contacts and the degree of concentration of the current is less than 1/2 as compared with the case of using one set of sliders. Further, said operation circuit has a plurality of parallel contact parts, the rate of interrupting a current through bouncing and the like is reduced and not only spark but also burdens of respective patterns 87, 88, 91, 92 diminish to enable contriving to lengthen the life of an apparatus. |
