PROBLEM TO BE SOLVED: To provide an ultrasonic vibration device which has a constitution in which a discharge phenomenon from a metallic electrode plate of a piezoelectric substance unit to a metal case body is prevented, and whose diameter is made narrower than that of the prior art.SOLUTION: An ultrasonic vibration device 2 comprises: a lamination vibrator on which a plurality of piezoelectric substances 61 and a plurality of electrode plates 62a, 63a are laminated two insulation plates 42, 43 which are arranged on both ends of the lamination vibrator a metal case 50 which stores the lamination vibrator and the two insulation plates 42, 43 an insulation processing unit 71 which insulates the exposed part of the plurality of electrode plates 62a, 63a from the metal case 50 and an opening which is formed in the metal case 50, and introduces the insulation material forming the insulation processing unit 71 into the metal case 50 after the lamination vibrator and the two insulation plates 42, 43 are stored and fixed in the metal case 50.COPYRIGHT: (C)2015,JPO&INPIT【課題】圧電体ユニットの金属電極板から金属ケース体への放電現象を防止した構成として、従来よりも細径とすることができる超音波振動デバイスを提供する。【解決手段】超音波振動デバイス2は、複数の圧電体61および複数の電極板62a,63aが積層された積層振動子と、積層振動子の両端に配設される2つの絶縁板42,43と、積層振動子および2つの絶縁板42,43を収容する金属ケース50と、複数の電極板62a,63aの露出部と金属ケース50とを絶縁する絶縁処理部71と、金属ケース50に形成され、積層振動子および2つの絶縁板42,43が金属ケース50に収容されて固定された後に、絶縁処理部71を形成する絶縁材料を金属ケース50内に導入するための開口部と、を具備する。【選択図】図11
