| 摘要 |
PROBLEM TO BE SOLVED: To prevent the generation of abnormal sound due to the vibration of a buzzer, while avoiding the increase of part counts, processing man hour, and assembling man hour. SOLUTION: In a control module 10 in which a buzzer 20 is mounted in a printed circuit board 11, a moisture-proof coating 16 which coats and prevents the moisture of the electric component mounting area 14 of the printed circuit board 11 is coated on the leg 24 of the buzzer 20 mounted in the printed circuit board 11. Since the leg of the buzzer is fixed by the moisture-proof coating material coated on the leg of the buzzer, it is possible to prevent the generation of abnormal sound caused by the leg to hit the printed circuit board accompanying the vibration of the buzzer. In the step to coat the moisture-proof coating material on the component mounting area by coating the moisture-proof coating material also on the leg of the buzzer, it becomes not necessary to increase the part count, the processing man hour, and the assembling man hour. COPYRIGHT: (C)2008,JPO&INPIT
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