| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive explosive sound device capable of easily driving away animals and suspicious persons that can be easily installed anywhere, even in a place without a 100V outlet. SOLUTION: When a cracker (gunpowder ball) completely shutting out water and moisture from the outside is placed on hard ground, it explodes when an animal or a suspicious person steps on it and displays a threatening effect. Further, on soft ground, by pinching the cracker (gunpowder ball) between two metal plates with hinges, the cracker explodes when weight is applied on the plate, and a similar threatening effect can be exhibited. Further, when the cracker (gunpowder ball) is buried in an providing, when an animal bites it, the cracker explodes to obtain a sufficient threatening effect. COPYRIGHT: (C)2009,JPO&INPIT
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