| 摘要 |
PURPOSE:To eliminate the closed structure of a device and to reduce its size and weight by employing a multi-layered structure for a resistance body. CONSTITUTION:This sensor M is constituted by putting a sensor main body in the storage case consisting of a bottom plate 2 and a cover 3 covering the bottom plate 2. Then the resistance body 8 and a current collector 8 are formed on the substrate 4 of the main body which is fixed to the bottom plate 2 and a slider 10 is so fitted as to slide in contact with them. This resistance body has the two-layered structure of a basic resistance body layer 21 formed opposite the substrate 4 in contact and a protective resistance body layer 22 formed thereupon. The volume characteristic resistance of the resistance body layer 22 is set higher than that of the resistance body layer 21. The resistance body layer 21 is therefore covered with the low resistance body layer 22 and shielded and protected from external temperature, humidity, and dust, and the slider 10 slides in contact with only the resistance body layer 22, so the resistance body layer 21 never wears. Further, the volume characteristic resistance of the resistance body layer 22 is high, so its wear hardly affects the resistance value of the whole resistance body 8. |
