| 摘要 |
Provided is an audible alarm device including a piezoelectric buzzer, which is capable of suppressing wasted current consumption not contributing to increased sound pressure of the piezoelectric buzzer. The audible alarm device includes: a piezoelectric buzzer (32); a coil (33) connected in parallel to the piezoelectric buzzer (32); a current limiting means (34) for adjusting a current supply period for the piezoelectric buzzer (32) and the coil (33), and limiting a current to the coil (33) during current supply; and a control circuit (31) for controlling on/off time of the current limiting means (34). |
