| 摘要 |
PROBLEM TO BE SOLVED: To prevent the deterioration of sound while the movement of a rolling element is smooth even when saliva is attached to the rolling element or a resonance chamber part.SOLUTION: A rolling element 2 is structured to be a cylindrical shape closed at its one end or the cylindrical shape opened at its other end or a rod-like shape, whereas peripheral edge thrust away parts 11;12 and end side thrust away parts 13;14 for reducing the contact area of the rolling element 2 to an inside empty chamber part 9 are provided in the rolling element 2. After the rolling element 2 is stored in the inside empty chamber part 9 of a whistle main body part 3, a whistle part 4 is placed over the whistle main body 3, and by integrating the whistle main body 3 and the whistle case part 4 by adhesion or deposition, the whistle 1 is structured to be in a shape having the rolling element 2, a mouthpiece part 5, a resonance chamber part 6, and an outlet part 7. Even when the peripheral edge side thrust away parts 11;12 and the end side thrust away parts 13;14 are provided on an inner peripheral surface of the inside empty chamber part 9, embodiment can be pursued. |
