| 摘要 |
<p>A piezoelectric electroacoustic transducer which is made by joining a first resin case (3) having sound release holes (3c) and a second resin case (4) by ultrasonic bonding with a piezoelectric vibrator (5) while being held between the two cases. As for the piezoelectric vibrator (5), the one which has a nearly rectangular flat section is used. Owing to the configuration mentioned above, the vibrator is hardly damaged even if the resin cases are assembled by ultrasonic bonding.</p> |
