JPH02103997U

JPH02103997U -

Info

Publication number: JPH02103997U
Application number: JP1235289U
Authority: JP
Priority date: 1989-02-04
Filing date: 1989-02-04
Publication date: 1990-08-17

Description

[Brief explanation of drawings]

第１図は本考案の電話機受話器用圧電変換器の
概略断面図である。第２図は本考案に係る金属振
動板及びノツチ部との関係を示す平面図である。
第３図は本考案の電話機受話器用圧電変換器を受
話器に実装した状態の概略断面図である。第４図
ａは第１図の電話機受話器用圧電変換器の周波数
―音圧特性を示す特性図であり、第４図ｂは第３
図のように受話器に実装した状態の周波数―音圧
特性を示す特性図である。第５図ａは、本考案の
電話機受話器用圧電変換器の他の実施例の概略断
面図であり、第５図ｂはその周波数―音圧特性を
示す特性図である。第６図は本考案の電話機受話
器用圧電変換器の別の実施例の概略断面図である
。第７図は従来の電話機受話器用圧電変換器の概
略断面図である。１……容器、２，５０，６４……圧電振動子、
１１……内壁部、１２，６３……段差部、１３…
…ノツチ部、２１，５１……金属振動板、２２，
５２……圧電磁器。 FIG. 1 is a schematic cross-sectional view of a piezoelectric transducer for a telephone handset according to the present invention. FIG. 2 is a plan view showing the relationship between the metal diaphragm and the notch portion according to the present invention.
FIG. 3 is a schematic cross-sectional view of the piezoelectric transducer for a telephone handset of the present invention mounted on a handset. FIG. 4a is a characteristic diagram showing the frequency-sound pressure characteristics of the piezoelectric transducer for the telephone handset shown in FIG.
FIG. 3 is a characteristic diagram showing frequency-sound pressure characteristics when the device is mounted on a handset as shown in the figure. FIG. 5a is a schematic sectional view of another embodiment of the piezoelectric transducer for a telephone handset according to the present invention, and FIG. 5b is a characteristic diagram showing its frequency-sound pressure characteristics. FIG. 6 is a schematic cross-sectional view of another embodiment of the piezoelectric transducer for a telephone handset according to the present invention. FIG. 7 is a schematic cross-sectional view of a conventional piezoelectric transducer for a telephone handset. 1... Container, 2, 50, 64... Piezoelectric vibrator,
11... Inner wall part, 12, 63... Step part, 13...
...notch part, 21,51...metal diaphragm, 22,
52...Piezoelectric ceramic.

Claims

[Scope of utility model registration request]

A telephone receiver characterized in that an end of a piezoelectric vibrator having a piezoelectric element affixed to one surface of a metal diaphragm is placed and fixed on a stepped portion continuously or discontinuously formed on the inner wall of a container having a recessed portion. Piezoelectric transducer.