| 摘要 |
PURPOSE:To simplify the structure of the case of a vibration-sensitive part, to prevent a high viscosity liquid from entering the case of the vibration-sensitive part and to make the operation seismic intensity of a switch part variable, by filling the space between an outer case and a membrane with the high viscosity liquid and providing the switch part operating by the motion of the vibration-sensitive sphere arranged in the case of the vibration-sensitive part of which the outer surface is adhered to the membrane. CONSTITUTION:When vibration such as an earthquake occurs, a vibration-sensitive sphere 2 moves and impinges against the second switch part 6 when vibration reaches a definite level or more and the contact part 9 of said switch part 6 is brought into contact with the contact part 8 of the first switch part 5. The sensed vibration is transmitted to a control part on the basis of the signal from said switch part 5. When a switch moving shaft 4 is regulated, the seismic sensed value of vibration can be made variable by the up-and-down movement of the switch parts 5, 6. The outer surface part of the case 1 of a vibration-sensitive part is adhered to the membrane 12 covering the upper surface opening of an outer case 13 and the space between the case 13 and the membrane 12 is filled with a high viscosity liquid 14 and, therefore, the case 1 operates on the basis of the same seismic sensed value regardless of mounting. |
