| 摘要 |
PROBLEM TO BE SOLVED: To provide a small bear-avoiding bell with a belt, which secures an appropriate sound volume in spite of a small bell.SOLUTION: A metal plate 3 of a diameter of 20 mm or less, and a thickness of 4 mm, is mounted between a bell body 1 and the belt 2, in the bear-avoiding bell with a belt. The metal plate has an area of 1,256 mmor less in plan view, and its thickness is 4 mmor less. |
