JPS59111394U - electromagnetic speaker - Google Patents
electromagnetic speakerInfo
- Publication number
- JPS59111394U JPS59111394U JP279183U JP279183U JPS59111394U JP S59111394 U JPS59111394 U JP S59111394U JP 279183 U JP279183 U JP 279183U JP 279183 U JP279183 U JP 279183U JP S59111394 U JPS59111394 U JP S59111394U
- Authority
- JP
- Japan
- Prior art keywords
- electromagnetic speaker
- case
- protrusion
- yoke
- ballast
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の電磁スピーカを示す正断面図、第２図は
本考案に係る電磁スピーカの実施例を示す正断面図、第
３図は実施例で用いる樹脂ケースの底面図、第４図は実
施例の周数数特性を従来の場合と比較して示すグラフで
ある。
１．２０・・・ヨーク、２．２１・・・凸部、３，２２
・・・コイル、４．２３・・・円筒形永久磁石、５．２
４・・・円形振動板、６．２５・・・バラスト、７，２
６・・・樹脂ケース、８．２７・・・前面部、２８・・
・側面部、３０・・・円形凹部、３１・・・円環状厚肉
部、３２・・・放射状厚肉部、３３・・・放音孔。Fig. 1 is a front sectional view showing a conventional electromagnetic speaker, Fig. 2 is a front sectional view showing an embodiment of the electromagnetic speaker according to the present invention, Fig. 3 is a bottom view of a resin case used in the embodiment, and Fig. 4. is a graph showing the frequency characteristics of the example in comparison with the conventional case. 1.20...Yoke, 2.21...Protrusion, 3,22
... Coil, 4.23 ... Cylindrical permanent magnet, 5.2
4...Circular diaphragm, 6.25...Ballast, 7,2
6...Resin case, 8.27...Front part, 28...
- Side part, 30... circular recessed part, 31... annular thick walled part, 32... radial thick walled part, 33... sound emission hole.
Claims (2)
に鰻けられるコイルと、前記ヨークに固定される円筒形
永久磁石と、前記凸部に対向しており中央にバラストを
固着した円形振動板と、該円形振動板に対向する前面部
に放音孔を形成した樹脂ケースとを具備した電磁スピー
カにおいて、前記ケースの前面部の内面には前記バラス
トより大径の凹部が形成されており、前年放音孔は該凹
部周辺の厚肉部に複数箇所設けられていることを特徴と
する電磁スピーカ。(1) A yoke with a protrusion formed in the center, a coil placed around the protrusion, a cylindrical permanent magnet fixed to the yoke, and a ballast fixed to the center facing the protrusion. In the electromagnetic speaker, the electromagnetic speaker is equipped with a circular diaphragm and a resin case having a sound emission hole formed in a front surface facing the circular diaphragm, wherein a recess with a diameter larger than the ballast is formed on the inner surface of the front surface of the case. An electromagnetic speaker characterized in that a plurality of sound emitting holes are provided in a thick wall portion around the recess.
ケース側面部に延長する放射状部分とから構成されてい
る実用新案登録請求の範囲第１項記載の電磁スピーカ。(2) The electromagnetic speaker according to claim 1, wherein the thick wall portion of the case is composed of an annular portion and a radial portion extending from the annular portion to the side surface of the case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP279183U JPS59111394U (en) | 1983-01-14 | 1983-01-14 | electromagnetic speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP279183U JPS59111394U (en) | 1983-01-14 | 1983-01-14 | electromagnetic speaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59111394U true JPS59111394U (en) | 1984-07-27 |
| JPH0139037Y2 JPH0139037Y2 (en) | 1989-11-21 |
Family
ID=30134445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP279183U Granted JPS59111394U (en) | 1983-01-14 | 1983-01-14 | electromagnetic speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59111394U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002051396A (en) * | 2000-05-22 | 2002-02-15 | Matsushita Electric Ind Co Ltd | Electromagnetic electroacoustic transducer and portable terminal unit |
-
1983
- 1983-01-14 JP JP279183U patent/JPS59111394U/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002051396A (en) * | 2000-05-22 | 2002-02-15 | Matsushita Electric Ind Co Ltd | Electromagnetic electroacoustic transducer and portable terminal unit |
| JP4536284B2 (en) * | 2000-05-22 | 2010-09-01 | パナソニック株式会社 | Electromagnetic electroacoustic transducer and portable terminal device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0139037Y2 (en) | 1989-11-21 |
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