JPS628799U

JPS628799U -

Info

Publication number: JPS628799U
Application number: JP10092585U
Authority: JP
Priority date: 1985-07-01
Filing date: 1985-07-01
Publication date: 1987-01-20

Description

[Brief explanation of the drawing]

第１図は本考案に係る圧電イヤホーンの一実施
例の縦断面図、第２図は従来の圧電イヤホーンの
縦断面図、第３図は第１図および第２図の圧電イ
ヤホーンの音圧レベルの周波数特性のグラフであ
る。１０……外部ケース（１０ａ……段部、１０ｂ
……音導部、１０ｃ……蓋、１０ｄ……音導孔）
、１１……圧電発音体、１２……発泡体、１３…
…粘着剤層、１４……キヤビテイ、１５……連続
型発泡体。 FIG. 1 is a vertical cross-sectional view of an embodiment of a piezoelectric earphone according to the present invention, FIG. 2 is a vertical cross-sectional view of a conventional piezoelectric earphone, and FIG. 3 is a sound pressure level of the piezoelectric earphone shown in FIGS. 1 and 2. It is a graph of the frequency characteristic of. 10...External case (10a...Stepped part, 10b
...sound guide part, 10c...lid, 10d...sound guide hole)
, 11... piezoelectric sounding body, 12... foam, 13...
...Adhesive layer, 14...Cavity, 15...Continuous foam.

Claims

[Claims for Utility Model Registration] (1) A piezoelectric sounding body is supported at its outer periphery inside an exterior case in which a cylindrical sound guiding part projects outward, and the piezoelectric sounding body generates sound. In a piezoelectric earphone in which sound waves are guided to the outside through the sound guiding portion, the piezoelectric sounding body is bonded to the inner circumference of a ring-shaped foam provided with an adhesive layer, and the outer circumference of the foam is bonded to the inner circumference of the ring-shaped foam provided with an adhesive layer. A piezoelectric earphone characterized in that a portion of the earphone is bonded to an inner wall surface of the outer case, and the foam body supports the piezoelectric sounding body on the outer periphery of the outer case. (2) The piezoelectric earphone according to claim 1, wherein a continuous foam body through which air can pass is inserted into the sound guiding portion.