JPH0671353B2 - Microphone unit - Google Patents
Microphone unitInfo
- Publication number
- JPH0671353B2 JPH0671353B2 JP59146421A JP14642184A JPH0671353B2 JP H0671353 B2 JPH0671353 B2 JP H0671353B2 JP 59146421 A JP59146421 A JP 59146421A JP 14642184 A JP14642184 A JP 14642184A JP H0671353 B2 JPH0671353 B2 JP H0671353B2
- Authority
- JP
- Japan
- Prior art keywords
- insulator
- microphone
- metal case
- sound hole
- differential microphone
- 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.)
- Expired - Lifetime
Links
- 239000012212 insulator Substances 0.000 claims description 20
- 239000002184 metal Substances 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 16
- 239000004744 fabric Substances 0.000 claims description 2
- 239000012528 membrane Substances 0.000 claims description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/222—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only for microphones
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は電話等の通信用として帯域制限を必要とする場
合に最適でかつ安価に組立てられるマイクロホンユニッ
トに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microphone unit that is optimally and inexpensively assembled when a band limitation is required for communication of a telephone or the like.
従来例の構成とその問題点 第１図は従来のマイクロホンユニットの断面図例を示し
ている。以下にこの従来例の構成について図面とともに
説明する。第１図においては、１は天面に音孔1aを有す
る金属ケース,2は内蔵されている振動膜の前面と背面に
加わる音圧差により動作する差動型マイクロホンであ
り、絶縁体３によりこの差動型マイクロホンの前部と背
部を分離し、かつ絶縁体３に設けられた音孔30により前
部と背部が通気する如く構成されている。又、金属ケー
ス１の天面と絶縁体３の前部の間に漏れ防止用ゴムリン
グ４を介して前記室５を構成し、かつ絶縁体３の背部に
背気室用ケース６により背気室７を構成している。８は
差動型マイクロホン２の出力用リード線であり、外部ケ
ース９に設けられた金属端子9aに接続されている。尚、
絶縁体３と背気室用ケース６及び差動型マイクロホン２
の接部，出力用リード線８の背気室用ケース６の貫通部
8aはボンド付等により接着することにより漏れを防止し
密閉している。以上の各部品は金属ケース１の端部10を
カシメることにより固定されている。Configuration of Conventional Example and Problems Thereof FIG. 1 shows an example of a sectional view of a conventional microphone unit. The configuration of this conventional example will be described below with reference to the drawings. In FIG. 1, 1 is a metal case having a sound hole 1a on the top surface, 2 is a differential microphone that operates by the sound pressure difference applied to the front and back surfaces of the built-in vibrating membrane, and the insulator 3 The differential microphone has a front part and a back part separated from each other, and a sound hole 30 provided in the insulator 3 allows the front part and the back part to be ventilated. Further, the chamber 5 is formed between the top surface of the metal case 1 and the front portion of the insulator 3 via a rubber ring 4 for preventing leakage, and the back air chamber case 6 is provided on the back portion of the insulator 3 to prevent back air. It constitutes the chamber 7. Reference numeral 8 denotes an output lead wire of the differential microphone 2, which is connected to a metal terminal 9a provided on the outer case 9. still,
Insulator 3, back air chamber case 6, and differential microphone 2
Of the back lead chamber case 6 of the output lead wire 8
8a is sealed with a bond to prevent leakage. Each of the above components is fixed by crimping the end 10 of the metal case 1.
次に、以上の如く構成された上記従来例の動作について
説明する。まず、簡単な音響的等価回路を考えた場合、
第２図の如くであり、m1,r1は音孔1a,Sfは前気室5,m2,r
2は音孔3a,Sbは背気室7,m0,S0は差動型マイクロホン２
に等価する。第２図において、m1,r1とSf及びm2,r2とSb
は各々音響的ハイカットフィルターを構成していること
がわかる。差動型マイクロホン２に第３図の如く特性を
有するマイクロホンを用いた場合、m1,r1とSfのハイカ
ット周波数f1をm2,r2とSbのハイカット周波数f2より高
く設定してやれば、第４図の如く帯域制限された特性例
が得られる。f1,f2部のＱの調整は音孔1a,3aに音響抵抗
面布等を付加し、調整することができる。Next, the operation of the above conventional example configured as described above will be described. First, considering a simple acoustic equivalent circuit,
As shown in Fig. 2, m 1 , r 1 is the sound hole 1a, Sf is the front air chamber 5, m 2 , r
2 is a sound hole 3a, Sb is a back air chamber 7, m 0 , S 0 is a differential microphone 2
Is equivalent to. In Fig. 2, m 1 , r 1 and Sf and m 2 , r 2 and Sb
It can be seen that each constitutes an acoustic high cut filter. When a microphone having characteristics as shown in FIG. 3 is used as the differential microphone 2, if the high cut frequency f 1 of m 1 , r 1 and Sf is set higher than the high cut frequency f 2 of m 2 , r 2 and Sb. , A band-limited characteristic example is obtained as shown in FIG. f 1, f 2 parts of Q adjustments sound hole 1a, 3a adds an acoustic resistance surface fabric or the like, can be adjusted.
以上の如く構成された上記従来例においては、電話等の
通信用として帯域制限を必要とする場合に適する特性が
得られる利点を有するが構造が複雑であり、自動組立等
が難しいので量産に適さずどうしてもコスト高がまぬが
れないという欠点があった。The above-described conventional example configured as described above has an advantage that characteristics suitable for a case where band limitation is required for communication of a telephone or the like is obtained, but the structure is complicated and automatic assembly is difficult, so that it is suitable for mass production. There was a drawback that the high cost was unavoidable.
発明の目的 本発明は、上記従来例の欠点を除去するものであり、安
価で量産に適した構造を有し、帯域制限のできるマイク
ロホンユニットを提供することを目的とするものであ
る。The object of the present invention is to eliminate the above-mentioned drawbacks of the conventional example, and it is an object of the present invention to provide a microphone unit which has an inexpensive structure suitable for mass production and which can limit the band.
発明の構成 本発明は、上記目的を達成するために部品点数を少なく
するとともに構造を簡略化し、各部品を１つのブロック
として筒状金属ケースに挿入し、前記全挿入部品を金属
ケースの端部のカシメにより固定するものであり、自動
組立化を可能とする効果を得るものである。In order to achieve the above object, the present invention reduces the number of parts and simplifies the structure, inserts each part into a cylindrical metal case as one block, and inserts all the inserted parts into an end part of the metal case. It is fixed by crimping, and has the effect of enabling automatic assembly.
実施例の説明 以下に本発明の一実施例の構成について、図面とともに
説明する。第５図において、第１図と同一部分は同一番
号で示している。第５図において、絶縁体３は差動型マ
イクロホン２の前部と背部を分離するとともに前部の凹
部と金属ケース１の天面により前気室５を構成し、背部
の凹部とプリント基板11により背気室７を構成してい
る。3aは前気室５と背気室７を通気するための１ケもし
くは複数個の音孔である。プリント基板11は差動型マイ
クロホン２の出力を出力用リード線８を介して取り出す
ための出力端子も兼ねているものであり、ハンダ等によ
りプリント基板11の銅箔面11aと出力用リード線８を接
続している。以上のように結合された差動マイクロホン
2,絶縁体3,プリント基板11等を金属ケース１に挿入し
て、金属ケース１の端部10をカシメにより固定するもの
である。尚、本発明の場合、金属ケース１の天面と絶縁
体３の接面は平坦面で接しており、カシメにより固定す
るので別に従来のような漏れ防止のゴムリング等を必要
としない。又、絶縁体３とプリント基板11の接面も同様
である。Description of Embodiments A configuration of an embodiment of the present invention will be described below with reference to the drawings. 5, the same parts as those in FIG. 1 are indicated by the same numbers. In FIG. 5, the insulator 3 separates the front part and the back part of the differential microphone 2 and forms a front air chamber 5 by the recess of the front part and the top surface of the metal case 1, and the recess of the back part and the printed circuit board 11 This constitutes the back air chamber 7. Reference numeral 3a designates one or a plurality of sound holes for ventilating the front air chamber 5 and the back air chamber 7. The printed circuit board 11 also serves as an output terminal for taking out the output of the differential microphone 2 via the output lead wire 8. The copper foil surface 11a of the printed circuit board 11 and the output lead wire 8 are soldered or the like. Are connected. Differential microphone combined as above
2, the insulator 3, the printed circuit board 11, etc. are inserted into the metal case 1, and the end portion 10 of the metal case 1 is fixed by caulking. In the case of the present invention, since the top surface of the metal case 1 and the contact surface of the insulator 3 are in contact with each other by a flat surface and are fixed by caulking, a separate rubber ring for preventing leakage is not required. The same applies to the contact surface between the insulator 3 and the printed circuit board 11.
第６図は本発明における第２の実施例であり、差動型マ
イクロホン２を絶縁体３の前面側から挿入固定する構成
としたものである。又、第７図は第３の実施例であり、
絶縁体３の前部に突起3bを設けたことを特徴とするもの
であり、これにより第４図に示すハイカット周波数f1が
得られるようにしている。FIG. 6 shows a second embodiment of the present invention, in which the differential microphone 2 is inserted and fixed from the front side of the insulator 3. FIG. 7 shows the third embodiment,
This is characterized in that a protrusion 3b is provided on the front portion of the insulator 3 so that the high cut frequency f 1 shown in FIG. 4 can be obtained.
以上の如く本発明の場合、部品点数も少なく挿入部品で
ある絶縁体3,差動型マイクロホン2,プリント基板11等が
１つのブロックとして、あらかじめ構成可能であり、こ
のブロックを金属ケース１に挿入後カシメにより固定で
きるので、自動組立等が可能であり、安価で量産に適し
た構造を有するマイクロホンユニットを提供することが
できる利点がある。As described above, in the case of the present invention, the insulator 3, the differential microphone 2, the printed circuit board 11, etc., which are insertion parts with a small number of parts, can be configured in advance as one block, and this block is inserted into the metal case 1. Since it can be fixed by the rear caulking, there is an advantage that it is possible to provide a microphone unit having a structure suitable for mass production, which enables automatic assembly and the like.
発明の効果 本発明は上記のような構成であり、以下に示す効果が得
られるものである。EFFECTS OF THE INVENTION The present invention is configured as described above, and has the following effects.
背気室７をプリント基板を用いて構成しており、かつ、
前気室を構成する際にゴムリングを必要としないので、
部品点数を従来に比べ大幅に少なくできるとともに、自
動組立化が可能であるため安価で、しかも帯域制限ので
きるマイクロホンユニットを提供できる効果がある。The back air chamber 7 is composed of a printed circuit board, and
Since a rubber ring is not required when constructing the front air chamber,
The number of parts can be greatly reduced compared with the conventional one, and there is an effect that it is possible to provide a microphone unit that is inexpensive and band-limited because it can be automatically assembled.
第１図は従来のマイクロホンユニットを示す断面図、第
２図は第１図における音響的等価回路図、第３図は第１
図のマイクロホンユニットに用いられる差動型マイクロ
ホンの特性を示す周波数特性図、第４図は第１図におけ
るマイクロホンユニットの特性を示す周波数特性図、第
５図は本発明の一実施例におけるマイクロホンユニット
を示す断面図、第６図は本発明の第２の実施例を示す断
面図、第７図は第３の実施例を示す断面図である。 １……金属ケース、２……差動型マイクロホン、３……
絶縁体、８……出力用リード線、11……プリント基板、
11a……銅箔面。FIG. 1 is a sectional view showing a conventional microphone unit, FIG. 2 is an acoustic equivalent circuit diagram in FIG. 1, and FIG.
FIG. 4 is a frequency characteristic diagram showing characteristics of a differential type microphone used in the microphone unit shown in FIG. 4, FIG. 4 is a frequency characteristic diagram showing characteristics of the microphone unit shown in FIG. 1, and FIG. 5 is a microphone unit according to one embodiment of the present invention. FIG. 6 is a sectional view showing a second embodiment of the present invention, and FIG. 7 is a sectional view showing a third embodiment. 1 ... Metal case, 2 ... Differential type microphone, 3 ...
Insulator, 8 ... Output lead wire, 11 ... Printed circuit board,
11a: Copper foil surface.
Claims (2)
振動膜の前面と背面に加わる音圧差により動作する差動
型マイクロホンと、前記差動型マイクロホンを収納し前
部と背部にそれぞれ凹部を有する絶縁体と、前記絶縁体
前面の凹部と前記金属ケースの天面により構成した前気
室と、前記絶縁体背部の凹部と前記差動型マイクロホン
の出力を接続したプリント基板により構成した背気室
と、前記絶縁体に設けられ前記前気室と背気室の間を結
ぶ音孔とから成り、前記金属ケースの背面より前記差動
型マイクロホン，絶縁体，プリント基板を挿入し、カシ
メによりこれら各部品を固定したマイクロホンユニッ
ト。1. A cylindrical metal case having a sound hole on the top surface,
A differential microphone that operates by a sound pressure difference applied to the front surface and the back surface of the vibrating membrane, an insulator that accommodates the differential microphone and that has concave portions in the front and back portions, respectively, and a concave portion in the front surface of the insulator and the metal case. Front chamber formed by the top surface of the insulator, a back chamber formed by a printed circuit board connecting the recess of the back of the insulator and the output of the differential microphone, and the front chamber and the back provided in the insulator. A microphone unit comprising a sound hole connecting air chambers, the differential microphone, the insulator, and the printed circuit board being inserted from the back surface of the metal case, and the components being fixed by caulking.
部に音響抵抗面布を貼付け構成した特許請求の範囲第１
項記載のマイクロホンユニット。2. A sound resistance face cloth is attached to a sound hole portion of an insulator or a sound hole portion of a top surface of a metal case.
Microphone unit described in paragraph.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59146421A JPH0671353B2 (en) | 1984-07-13 | 1984-07-13 | Microphone unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59146421A JPH0671353B2 (en) | 1984-07-13 | 1984-07-13 | Microphone unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6125399A JPS6125399A (en) | 1986-02-04 |
| JPH0671353B2 true JPH0671353B2 (en) | 1994-09-07 |
Family
ID=15407304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59146421A Expired - Lifetime JPH0671353B2 (en) | 1984-07-13 | 1984-07-13 | Microphone unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0671353B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06103958B2 (en) * | 1987-03-16 | 1994-12-14 | 松下電器産業株式会社 | Microphone unit |
| JPH01255898A (en) * | 1988-04-06 | 1989-10-12 | Matsushita Electric Ind Co Ltd | Breath current sensor |
| JP2004056438A (en) * | 2002-07-19 | 2004-02-19 | Matsushita Electric Ind Co Ltd | Microphone |
| JP5022261B2 (en) * | 2008-02-08 | 2012-09-12 | 船井電機株式会社 | Microphone unit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5830397U (en) * | 1981-08-21 | 1983-02-28 | パイオニア株式会社 | electrodynamic speaker |
-
1984
- 1984-07-13 JP JP59146421A patent/JPH0671353B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6125399A (en) | 1986-02-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |