| 摘要 |
PROBLEM TO BE SOLVED: To reduce the size in height and thereby reduce stature by forming, in a substrate, windows so as not to interfere with vibration, when a piezoelectric transducer is driven and forming piezoelectric transducer support sections between the windows, and then installing a piezoelectric transducer with an adhesive through the support sections. SOLUTION: A substrate P is provided with windows W1-W3 which pass through both sides of a substrate. Between the central window W2 and the window W1 on one side and the window W3 on the other side, piezoelectric transducer support sections A, B are formed. A piezoelectric transducer T is, so installed that a primary and a secondary node of the transducer T is positioned at the support sections A and B, respectively. In the installation, a node of a primary-side electrode 3 formed on the lower surface of the transducer T is fixed to the support section A with a conductive adhesive. Then, the node of a secondary-side part on the lower surface of the transducer T is fixed to the support section B with a vibration-proof elastic adhesive.
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