| 摘要 |
PURPOSE: A bone conduction earphone of a piezoelectric element type supported with surround is provided to prevent the direct contact between a front case and a piezoelectric element by attaching a diffusion plate and a cushion plate to one side of a piezoelectric element. CONSTITUTION: One side of a back case(110) having an inner space is attachably and detachably combined with one side of a front case(150). A piezoelectric element(120) generates high pitch vibration according to an electrical signal inputted through an + or - leading wire(123). One end of a surround(125) is attached along the edge of the circumference of the piezoelectric element. The other end of the surround is attached to the back case. The piezoelectric element is not directly touched with the back case. The surround has one or more air holes(127) controlling air flow in the vibration state of the piezoelectric element. |
