| 摘要 |
<p>PURPOSE:To reduce the slide noise and to improve the durability by forming a file with a low friction coefficient on the contacting surface of a printed board which contacts the boss part end of a fitting ring for sliders. CONSTITUTION:On the contacting surface of the printed board 40 which contacts the boss part 34a of the fitting ring 34, the film 49 which the low friction coefficient is formed circularly by, for example, glass coating. A potentiometer 41 is provided with a resistance layer 42 and an electrode 43 as a main circuit and a resistance layer 44 and an electrode 45 as a subordinate circuit. Then the contacting impulse elements 36 and 37 are fitted to the fitting ring 34 and the resistance layers 42 and 44 are formed by carbon printing. Consequently, the film 49 which has the low friction coefficient is formed on the contacting surface of the substrate 40 where the end of the boss part 34 is pressed and slid, so the friction resistance becomes extremely small and the friction is reduced. The durability is therefore improved greatly.</p> |
