| 摘要 |
PURPOSE:To decrease the number of components and to reduce cost and weight by using a metallic substrate which constitutes part of the device as the metallic chassis of an electronic equipment in common. CONSTITUTION:A brass-made box type shield case (metallic substrate) 5 for a DC/DC converter is fixed by soldering on the front flank of the substrate 11 and a discoid piezoelectric substrate 4 where a discoid plus electrode 3 is laminated is fixed on the external surface by the case 5 by a specific means. An acoustic element (piezoelectric device) 1 is composed of those electrode 3 and piezoelectric substrate 4, and the shield case 5 as a minus electrode. Thus, the metallic substrate which constitutes part of the acoustic element 1 is used as the shield case 5 of a camera integrated VTR in common, so the shield function for the DC/DC converter and a sounding function as a buzzer, etc., are both provided. Consequently, the number of components is decreased and the weight is reducible. |
