| 摘要 |
PURPOSE:To make it possible to sense vibration in a predetermined direction, by providing a guide groove, which guides a spherical seismoscopic element in a predetermined direction, to the back surface of the lid of a seismoscopic apparatus. CONSTITUTION:A main body 1 made of a synthetic resin, which is formed by integrally molding a case part 2 having a recessed receiving part 4 and a piercing hole 5, and a contact mechanism part 7, and a spherical seismoscopic element 14, which is freely tumbled on a cone-shaped buttom part 3, are provided to the center of the cone-shaped bottom part 3. A guide groove 6a in a single side one direction for guiding the spherical seismoscopic element 14 and an arrow 6b showing a moving direction are formed to the back surface of the lid 6 of a seismoscopic apparatus consisting of an operation shaft 15 and a contact block 17. When the seismoscopic apparatus receives vibration, the spherical seismoscopic element 14 is shifted from the recessed receiving part 4 to be tumbled along the cone-shaped bottom part 3 and releases the pressing force to the operation shaft 15 and can sense only the vibration in a predetermined direction selected by the guide groove 6a. |
