| 摘要 |
PURPOSE: A vibration speaker is provided to save manufacturing cost and to increase productivity by having speaking function and vibration function with weight body and elastic member. CONSTITUTION: A case(10) is formed with an acoustic emitting hole(11) at one side. A vibrator(30) is installed to laminate an isolator(32), an upper electrode(33), a piezo-electric element and a lower electrode on a wide vibration plate(31) vertically. A support makes the vibration plate(31) of the vibrator(30) to connect to the case(10). The end part of both side of the weight body(40) is curved to be able to contact each other to the peripheral part of the vibration plate(31). A coil(41) is wound at the peripheral part of portion which connects the end part of both side of the weight body(40). The elastic member(50) makes the weight body(40) to be supported elastically from the case(10). A vibration speaker generates vibration by resonance in state that the vibrator(30) and the weight body(40) is adhered in a body when low frequency current flows in the upper electrode(33) and the piezo-electric element(34) and the lower electrode(35).
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