| 摘要 |
PURPOSE:To secure the fetching of an electric signal generated by having a conductor securely pressed on a vibration element to fetch an electrical signal. CONSTITUTION:A raindrop detector 10 has first and second substrates 11 and 13 and a cover 14 is placed over flanges 11a and 13a thereof to be joined at the periphery. A diaphragm 17 is mounted and retained elastically to a round hole 14a on the top of the cover 14. A printed circuit board 28 is mounted on the substrate 11, bases of elastic conductors 29a-29c are fixed thereon 28 with the elastic conductors 29a and 29b connected to the input of an integrated circuit 31 of an amplifier while the conductor 29c connected to the earth. After the assembly of the first substrate 11 and the cover 14, the elastic conductor 29a is pressed on a conduction plate 21a of the vibration element 21, the elastic body 29b on a piezo-electric element 21b and the conductor 29c on the cover 14. This ensure an accurate fetching of an electrical signal generated in the vibration element 21. |
