| 摘要 |
PURPOSE:To expedite a response speed to inclination and to reduce the amount of magnetic fluid by covering a permanent magnet housed in a case with a magnetic cap having a specified weight so as to cover the most parts of the upper surface and the side surface ranging to the vicinity of the bottom surface of the permanent magnet. CONSTITUTION:A cap 15 which is made to cover a permanent magnet 12 has a shape which covers the most parts of the upper surface and the side surface to the vicinity of the bottom surface. A weight is added to the permanent magnet 13 and a desired weight W is obtained. When a case is inclined by alpha, the permanent magnet 13 tends to move along the bottom surface. At this time, the component of force w.sinalpha becomes large. When the component of force becomes large, various forces which block the movement, i.e. attracting force with the reed of a reed switch 17, viscosity of magnetic fluid, surface tension and the like, can be readily overcome. Therefore, the inclination of the case can immediately respond thereto and sensitivity is improved. |
