| 摘要 |
PURPOSE:To prevent the generation of damages for a long period of time by printing >=2 kinds of resistors spacially so as not to produce an overlap part within the sliding width of a contact point, and conducting the same electrically on the outside of the sliding width of the contact point in such a way that the change rate of the resistance value between the two resistance circuits attains <=8% of one resistance value. CONSTITUTION:The overlap part 8 of resistance circuits 5, 6 printed by using low resistance paste and high resistance past is weared abnormally by the sliding of a contact point 7. Therefore, the electrical joining 10 of the two circuits 5, 6 differing in resistance is accomplished in the parts except the part where the contact point 7 passes, and the passage where the contact point 7 passes is made by opening the narrowest possible spacing that the accuracy of printing permits. The electrical joining part 10 is so conducted that the change rate of the resistance value between the two circuits 5, 6 attains <=8% of one resistance value. |
