| 摘要 |
PURPOSE:To obtain a sensor having capacity equal to or more than that of a mercury switch, by providing a conductive sphere to the part surrounded by four columnar materials, wherein the half of each material is conductive and the other half is insulative, in a freely movable manner. CONSTITUTION:Four columnar materials 6, wherein the half of the surface of each material is a conductive part 6a and the other half is an insulating part 6b, are arranged in a rectangular shape and an insulating plate 5 prevents the sphere 4 provided in the part surrounded by the columnar materials 6 in a freely movable manner from coming out from said surrounded part. In a state A, the sphere 4 is impinged to the plate 5 but necessarily contacted with two columnar materials 6 among four because the plate 5 has an inclined part 5a and, because the half of each material 6 is the conductive part 6a, two columnar materials 6 come to a continuity state. Next, in a state B, the sphere 4 contacted with two columnar materials 6 and, because the half of each material 6 is the insulating material 6b, two columnar materials 6 come to a non-continuity state. When a vibration sensor moves left and right in the state B, the sphere 4 moves left and right on the columnar materials 6. At this time, because the half of each columnar material is insulated, electrical operation takes a continuity state and a non-continuity state. By detecting this change, the vibration of matter is detected. |
