| 摘要 |
<p>Vibration is prevented from being transmitted via a fixed substrate (3). In order to differentiate the resonance frequency for the vibration of a piezoelectric vibrator (4), piezoelectric vibrators (4) having different lengths are fixed to the same fixed substrate (3). Even if residual vibration of a pressure generation chamber (9) which is expanded/contracted by a piezoelectric vibrator (4) to which a voltage is applied is transmitted to the fixed substrate (3), and the vibration is transmitted to a second piezoelectric vibrator (4) via the fixed substrate (3), the second piezoelectric vibrator (4) does not vibrate because the resonance frequency is different among the piezoelectric vibrators (4). Consequently, the pressure generation chamber (9) on which the second piezoelectric vibrator (4) is abutting is neither expanded nor contracted by the vibration.</p> |
