JPH0221896U

JPH0221896U -

Info

Publication number: JPH0221896U
Application number: JP9186788U
Authority: JP
Priority date: 1988-07-13
Filing date: 1988-07-13
Publication date: 1990-02-14

Description

[Brief explanation of drawings]

第１図は本考案の一実施例の断面図、第２図は
その圧電複合素子の平面図、第３図、第４図及び
第５図はいずれもその圧電複合素子の他の例の側
面図、第６図は本考案の他の実施例の平面図、第
７図は第６図の―線断面図、第８図はその底
面図、第９図は従来例の断面図である。１……圧電複合素子、１ａ……圧電素子、１ｂ
……金属板、２……周辺端部、４……中央端部、
７，７′……スピーカ振動板。 Figure 1 is a sectional view of one embodiment of the present invention, Figure 2 is a plan view of the piezoelectric composite element, and Figures 3, 4, and 5 are side views of other examples of the piezoelectric composite element. 6 is a plan view of another embodiment of the present invention, FIG. 7 is a sectional view taken along the line -- in FIG. 6, FIG. 8 is a bottom view thereof, and FIG. 9 is a sectional view of a conventional example. 1...Piezoelectric composite element, 1a...Piezoelectric element, 1b
...Metal plate, 2...Peripheral end, 4...Central end,
7, 7'...Speaker diaphragm.

Claims

[Claims for Utility Model Registration] 1. A piezoelectric composite element formed by bonding a piezoelectric element formed in the shape of a spiral coil and having electrodes on the front and back surfaces to a metal plate formed in the shape of a spiral coil, and a damper material surrounding the piezoelectric element. a speaker diaphragm fixed to the speaker frame via a speaker diaphragm, a peripheral end of the piezoelectric composite element is fixed to the speaker frame, and a central end of the piezoelectric composite element is fixed to the center of the speaker diaphragm. A piezoelectric speaker characterized by being bonded. 2. The piezoelectric speaker according to claim 1, wherein the piezoelectric element is bonded to both sides of the metal plate. 3. The piezoelectric speaker according to claim 1 or 2, wherein the piezoelectric elements are laminated in multiple layers. 4. The piezoelectric speaker according to claim 1, wherein the speaker diaphragm has a cone shape.