| 摘要 |
Disclosed is a piezoelectric vibration device. A piezoelectric vibration member vibrates with a maximum displacement of an edge or both ends thereof in a vertical direction on the basis of a central part as a point of action of vibration or a maximum displacement of a central part thereof in the vertical direction on the basis of both ends or a plurality of edge parts as the point of action of vibration by changing polarity of an applied voltage. A weight is formed with a material having high specific gravity and is coupled with a maximum displacement point of the piezoelectric vibration member as one body. The weight interlocks and vibrates with the vibration of the piezoelectric vibration member to amplify vibration at a specific frequency of a driving voltage. One side of a vibration supporting member is fixed on a vibration force transferring target and the other side of the vibration supporting member is coupled with a predetermined part of a piezoelectric vibration member so that the vibration supporting member supports the piezoelectric vibration member to vibrate the piezoelectric vibration member in the vertical direction on the basis of the predetermined part as the point of action of vibration. A coupling member is used for coupling the weight and the piezoelectric member as one body so as to apply the full weight of the weight to the piezoelectric vibration member. A vibration displacement is amplified at a particular frequency using the coupling member having elasticity or the vibration supporting member. The power consumption of the piezoelectric vibration device is remarkably reduced in comparison with a vibration motor using electromagnetic induction. |
