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    • 10. 发明授权
    • Composite vibration device
    • 复合振动装置
    • US06717335B2
    • 2004-04-06
    • US09993963
    • 2001-11-27
    • Toshio NishimuraJiro InoueHiroaki KaidaAkihiro Mitani
    • Toshio NishimuraJiro InoueHiroaki KaidaAkihiro Mitani
    • H01L4104
    • H03H9/0514H03H9/178
    • A composite vibration device includes a piezoelectric element defining a vibrating member, which is made of a material having a first acoustical impedance, first and second reflecting layers are connected to respective end surfaces of the piezoelectric element, each of the layers are made of a material having a second acoustical impedance lower than the first acoustical impedance, and first and second supporting members. Each of the first and second supporting members is made of a material having an acoustical impedance higher than the second acoustical impedance and is connected to the outer surface of each of the first and second reflecting layers. Vibrations propagated from the piezoelectric element are reflected at the interfaces between the reflecting layers and the supporting members.
    • 复合振动装置包括限定由具有第一声阻抗的材料制成的振动部件的压电元件,第一和第二反射层连接到压电元件的相应端表面,每个层由材料制成 具有低于第一声阻抗的第二声阻抗,以及第一和第二支撑构件。 第一和第二支撑构件中的每一个由具有高于第二声阻抗的声阻抗的材料制成,并且连接到第一和第二反射层中的每一个的外表面。 从压电元件传播的振动在反射层和支撑构件之间的界面处被反射。