| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a sensing device for detecting snowslides, etc. and which can inhibit malfunction and also maintain detection accuracy of landslides, etc. even if it is used in cold district where outside air temperature drops below the freezing point. <P>SOLUTION: This sensing device is provided with a microswitch 28 set to off, when the tip of a pin 28b is depressed and set to on, when released, a resin sheet body 32 installed on one side of a plate body 22 with a through-hole 26 opened so as to cover the through-hole 26, and a resin ball 38 mounted on the sheet body 32 covering the through-hole 26 so as to be rollable on the sheet body 32 covering the through-hole 26. The sheet body 32 covering the through-hole 26 is formed as a triangular tongue so as to depress the pin 28b with a part of the sheet body 32 bent by weight of the ball 38, when the ball 38 is mounted on the sheet body 32; while resetting the bent part of the sheet body 32 to substantially the same plane with other parts for releasing the pressed pin 28b, when the sensing device 10 is tilted, to allow the ball 38 to be rolled out from the bent part of the sheet body 32 with covers the through-hole 26. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
