| 摘要 |
The present invention relates to a piezo actuator including a power supply device for supplying power from the outside; a piezo which is contracted or expanded by a voltage applied through the power supply device; a vibration plate which generates vibration by bending motion according to the contraction or the expansion of the piezo; a weight which is connected to the vibration plate and amplifies vibration generated by the vibration plate; and a fixing member combined with the weight. The piezo actuator has characteristics that endure falling and shock in which the weight is not damaged even when shock is generated from the outside. |
