| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a vibration sensor that has a simple structure and is low in cost. SOLUTION: This device has a case body 1, a plate spring 2, which is movably inserted and arranged in the case body 1 in the state wherein the rear-end part is protruding from the end wall of the case body 1, and wherein a handle 4 is attached to the rear end and an arrowhead 5 is attached to the tip part at the same time, a supporting plate 7, which movably supports the plate spring 2 in the case body 1, a spring 8, which energizes the plate spring 2 to the side of the rear end, and a slant surface 10, which becomes contact with the arrowhead and pushes down the arrowhead 5 when the handle 4 is pushed against the energizing force of a spring 8 and the plate spring 2 is moved to the tip end side. Furthermore, the following parts are provided. A regulating member 9 has a part to be engaged 11, which regulates the movement of the plate spring 2 to the rear-end side by engaging and stopping the arrowhead 5 by a gill 5a of the arrow head 5 when the arrowhead 5, which is returned upward by the elasticity of the plate spring 2 after passing the slant surface 10. A weight 12 is arranged at the upper side of the arrowhead 5 so that the weight can be dropped at the time of vibration and is in contact with the arrowhead 5 at the time of falling.</p> |
