| 摘要 |
PURPOSE: An acupressure ball for hand exercising with a sound producing function is provided to continue hand exercising for a long time with pleasure by applying naturally produced sounds from friction such as stridulation sound of crickets. CONSTITUTION: An acupressure ball producing a sound, useful for hand exercising comprises a connection axis assembled with acupressure balls at both ends to form two spherical bodies and a frictional speaker installed into the sphere. The speaker has frictional sound springs or circumferential friction band to form a sound point. The acupressure balls and the connection axis are counter-rotating each other to produce frictional sounds such as stridulation sound of crickets. The circumferential friction band and one of the frictional springs are formed within recessed grooves in the balls. The other spring is fixed on the connection axis to produce sounds during hand exercising process.
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