| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a piezoelectric sounder which is miniaturized as a whole apparatus and gives a good sound and an electric apparatus using the piezoelectric sounder. <P>SOLUTION: The piezoelectric sounder 1 has a piezoelectric vibration element 4, an electrode 5, and a spacer 6. The piezoelectric vibration element 4 and the electrode 5 are laminated to other face of a piezoelectric diaphragm 3 provided with one face and the other face. The spacer 6 is adhered to the one face by a first adhesion layer 7A set on the one face of the spacer 6. The spacer 6 is made from butyl rubber, and a through-hole 6a is formed inside. The through-hole 6a becomes a vacant room to resonate a sound generated from the piezoelectric diaphragm 3, and increases the sound volume given from the piezoelectric sounder. The housing 2 of the electric apparatus is provided with an attaching portion 8, the vacant room is demarcated by attaching the piezoelectric sounder 1 here, and the sound volume given from the electric apparatus is increased. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
