JPH0453398U

JPH0453398U -

Info

Publication number: JPH0453398U
Application number: JP9547790U
Authority: JP
Priority date: 1990-09-11
Filing date: 1990-09-11
Publication date: 1992-05-07

Description

[Brief explanation of the drawing]

第１図は本考案の実施例を示す縦断面図、第２
図は本考案に用いる端子板の構造例を示す縦断面
図、第３図は本考案に用いるコイルの構造例を示
す縦断面図、第４図は本考案において端子板内に
コイルを収容した状態を示す平面図、第５図は従
来の圧電形電気音響変換器の１例を示す縦断面図
、第６図は第５図の具体例に用いられている振動
基板の構造を示す底面図、第７図は第１図の具体
例に用いられている端子板の構造例を示す平面図
である。１……振動基板、１−１……導電層を配置して
いない部分、２……圧電セラミツク板、３，３−
１，３−２……電極、４……絶縁層、５……導電
層、６……フロント、７，１７……端子板、８−
１，８−２，１７−１，１７−２……外部端子、
９，９−１……音響漏洩孔、１０，１０−１……
ダンパ材、２０……コイル、２０−１，２０−２
……リード線、Ａ……堀込み部。 Fig. 1 is a vertical sectional view showing an embodiment of the present invention;
The figure is a vertical cross-sectional view showing an example of the structure of the terminal plate used in the present invention, Figure 3 is a vertical cross-sectional view showing an example of the structure of the coil used in the present invention, and Figure 4 is a vertical cross-sectional view showing an example of the structure of the coil used in the present invention. FIG. 5 is a vertical sectional view showing an example of a conventional piezoelectric electroacoustic transducer, and FIG. 6 is a bottom view showing the structure of the vibrating substrate used in the specific example of FIG. 5. , FIG. 7 is a plan view showing an example of the structure of the terminal board used in the specific example of FIG. 1. 1... Vibration board, 1-1... Part where no conductive layer is arranged, 2... Piezoelectric ceramic plate, 3, 3-
1, 3-2... Electrode, 4... Insulating layer, 5... Conductive layer, 6... Front, 7, 17... Terminal board, 8-
1, 8-2, 17-1, 17-2...external terminal,
9, 9-1...acoustic leak hole, 10,10-1...
Damper material, 20...Coil, 20-1, 20-2
...Lead wire, A...Drilling part.

Claims

[Claims for Utility Model Registration] A piezoelectric vibrator in which one electrode of a piezoelectric material having paired electrodes on both sides is attached to a metal vibrating substrate, and two external terminals respectively connected to the paired electrodes. the metal vibrating substrate has a concave portion formed in the central portion such that the peripheral edge protrudes from the central portion, the piezoelectric material is affixed to the concave portion, and the piezoelectric material is affixed to the concave portion; An insulating layer is applied to at least a part of the surface other than the part to which the piezoelectric material is attached, and a conductive layer is applied from the other electrode different from the one electrode to the insulating layer, and the terminal board is a flat plate. The terminal board is formed into a shape, and an excavated part is formed on one surface of the terminal board except for the central part and the peripheral part, a coil is housed in the excavated part, and the two external terminals are The two external terminals penetrating the central portion and on the one side are bent so that each end crosses the digging portion and reaches a position on the peripheral portion that is symmetrical with respect to the central portion. both ends of the coil are respectively connected to the bent portions of the two external terminals, the first conductive pattern is in contact with the conductive layer by stacking the piezoelectric vibrator and the terminal plate, and A second conductive pattern is integrally connected to the peripheral edge of the metal vibrating board so that leakage magnetic flux is generated by a signal applied from the coil to the external terminal. Piezoelectric electroacoustic transducer.