| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a sound producing device in which sound wave emitted from a sounding body is emitted outside of a casing with high efficiency. <P>SOLUTION: A sound releasing hole 5a of a piezoelectric buzzer 5 is faced to a wall section 4a of the casing 4 of a combination meter 1, and an aperture section 4b is provided facing the sound releasing hole 5a on the wall section 4a. With this configuration, the sound wave emitted from the sound releasing hole 5a of the piezoelectric buzzer 5 is directly propagated to the aperture section 4b, and further emitted outside of the casing 4 from the aperture section 4b. Thereby, the combination meter 1 in which the sound wave emitted from the piezoelectric buzzer 5 is emitted outside of the casing from the aperture section 4b with high efficiency, is attained. <P>COPYRIGHT: (C)2007,JPO&INPIT |
