JPH1188988A - Condenser microphone - Google Patents
Condenser microphoneInfo
- Publication number
- JPH1188988A JPH1188988A JP23812897A JP23812897A JPH1188988A JP H1188988 A JPH1188988 A JP H1188988A JP 23812897 A JP23812897 A JP 23812897A JP 23812897 A JP23812897 A JP 23812897A JP H1188988 A JPH1188988 A JP H1188988A
- Authority
- JP
- Japan
- Prior art keywords
- back electrode
- condenser microphone
- housing member
- diaphragm
- face
- 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
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000005323 electroforming Methods 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims 1
- 238000009413 insulation Methods 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 229910001200 Ferrotitanium Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010936 titanium Substances 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
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、組立構造及び背極
部材と振動膜とのギャップ（間隙）出しを簡易にしたコ
ンデンサマイクロホンに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembling structure and a condenser microphone in which a gap (gap) between a back electrode member and a diaphragm is simplified.
【０００２】[0002]
【従来の技術】コンデンサマイクロホンは、原理的に構
造が簡単で、平坦で安定な周波数応答特性が得られるの
で、標準マイクロホンとして、また精密測定用マイクロ
ホンとして広く用いられている。コンデンサマイクロホ
ンでは、構造上、振動膜に安定した張力を与え、且つ背
極部材と振動膜との間に所定のギャップを設ける必要が
あるため、この点について特に注意が払われている。2. Description of the Related Art A condenser microphone is widely used as a standard microphone and as a precision measurement microphone because it has a simple structure in principle and can obtain a flat and stable frequency response characteristic. In the condenser microphone, due to its structure, it is necessary to apply a stable tension to the diaphragm and to provide a predetermined gap between the back electrode member and the diaphragm. Therefore, special attention is paid to this point.
【０００３】従来、図３に示すように、振動膜１００
は、背極部材１０１の端面と所望のギャップを保って、
ハウジング部材１０２の振動膜支持部（エッジ部）１０
２ａに当接して張設されている。所望のギャップを得る
ために、背極部材１０１の端面とエッジ部１０２ａの端
面とには、段差が形成されている。Conventionally, as shown in FIG.
Maintains a desired gap with the end face of the back electrode member 101,
Vibration membrane support portion (edge portion) 10 of housing member 102
It is stretched in contact with 2a. In order to obtain a desired gap, a step is formed between the end face of the back electrode member 101 and the end face of the edge portion 102a.
【０００４】この段差は、次のような組立作業により形
成される。 （１）はじめに、背極部材１０１を絶縁部材１０３にネ
ジ１０４により固定し、この組立物をハウジング部材１
０２の内部に挿入し、押し当て部材１０５を介してバッ
クリング１０６をねじ込み、一体としている。 （２）この状態で、エッジ部１０２ａの端面と背極部材
１０１の端面を共に研削加工し、エッジ部１０２ａの端
面と背極部材１０１の端面が同一平面（面一）となるよ
うにする。 （３）次に、ハウジング部材１０２から、背極部材１０
１、ネジ１０４、及び絶縁部材１０３で成る組立物を外
し、絶縁部材１０３とハウジング部材１０２の内周に形
成された段部１０２ｂとの間にスペーサを挿入した後、
最初の組立手順と同様の手順で再度組立を行う。 （４）このようにして組み立てることにより、背極部材
１０１の端面とエッジ部１０２ａの端面との段差は、ス
ペーサの厚みに相当する段差となる。The step is formed by the following assembling operation. (1) First, the back electrode member 101 is fixed to the insulating member 103 by screws 104, and this assembly is
02, and the buckling 106 is screwed through the pressing member 105 to be integrated. (2) In this state, both the end surface of the edge portion 102a and the end surface of the back electrode member 101 are ground so that the end surface of the edge portion 102a and the end surface of the back electrode member 101 are coplanar. (3) Next, from the housing member 102, the back electrode member 10
1, after removing the assembly consisting of the screw 104 and the insulating member 103, inserting a spacer between the insulating member 103 and the step 102b formed on the inner periphery of the housing member 102,
Assembling is performed again in the same procedure as the first assembling procedure. (4) By assembling in this manner, the step between the end face of the back electrode member 101 and the end face of the edge portion 102a becomes a step corresponding to the thickness of the spacer.
【０００５】なお、振動膜１００は、予め、リング部材
１０７と保持部材１０８との間に挟み込まれ、リング部
材１０７の一端に張設された状態で、リング部材１０７
と保持部材１０８とに組み付けられる。また、リング部
材１０７の内周に形成された雌ネジ部をハウジング部材
１０２の外周の側面に形成された雄ネジ部に螺合し、ね
じ込み深さを調整することにより、振動膜１００に適宜
の張力が作用するようにしている。The vibrating membrane 100 is sandwiched between the ring member 107 and the holding member 108 in advance, and is stretched at one end of the ring member 107.
And the holding member 108. Further, a female screw portion formed on the inner periphery of the ring member 107 is screwed into a male screw portion formed on the side surface of the outer periphery of the housing member 102, and the screwing depth is adjusted, so that the vibration film 100 can be appropriately fitted. The tension works.
【０００６】[0006]
【発明が解決しようとする課題】しかし、従来のコンデ
ンサマイクロホンにおいては、背極部材１０１と振動膜
１００との間のギャップを確保するために、２度組み立
てることが必要となるので、組立工程が煩雑となるとい
う問題点がある。However, in the conventional condenser microphone, it is necessary to assemble twice in order to secure a gap between the back electrode member 101 and the diaphragm 100. There is a problem that it becomes complicated.
【０００７】本発明は、従来の技術が有するこのような
問題点に鑑みてなされたものであり、その目的とすると
ころは、部品点数が少なく、しかも組み立てが容易なコ
ンデンサマイクロホンをを提供しようとするものであ
る。SUMMARY OF THE INVENTION The present invention has been made in view of such problems of the prior art, and has as its object to provide a condenser microphone which has a small number of parts and is easy to assemble. Is what you do.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決すべく本
発明は、導電性を有する筒状のハウジング部材と、この
ハウジング部材の内周に固定した筒状の絶縁部材と、こ
の絶縁部材の内周に固定した背極部材と、前記ハウジン
グ部材の端面に突出形成したエッジ部と、前記背極部材
との間に所定の間隙を設けて前記エッジ部に張設した導
電性を有する振動膜とを備えて構成するものである。SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a cylindrical housing member having conductivity, a cylindrical insulating member fixed to the inner periphery of the housing member, A back electrode member fixed to the inner periphery, an edge portion protruding from an end surface of the housing member, and a conductive diaphragm stretched over the edge portion with a predetermined gap provided between the back electrode member and the back electrode member Are provided.
【０００９】前記エッジ部は、電鋳法により形成するこ
とができる。The edge portion can be formed by an electroforming method.
【００１０】[0010]
【発明の実施の形態】以下に本発明の実施の形態を添付
図面に基づいて説明する。ここで、図１は本発明に係る
コンデンサマイクロホンの断面図、図２は同じく組立説
明図である。Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a sectional view of a condenser microphone according to the present invention, and FIG.
【００１１】図１に示すように、本発明に係るコンデン
サマイクロホンは、ハウジング部材１、絶縁部材２、背
極部材３、ハウジング部材１の端面１ａに形成したエッ
ジ部４及び振動膜５などから構成される。As shown in FIG. 1, a condenser microphone according to the present invention comprises a housing member 1, an insulating member 2, a back electrode member 3, an edge portion 4 formed on an end surface 1a of the housing member 1, a vibration film 5, and the like. Is done.
【００１２】ハウジング部材１は、金属等の導電性部材
を用いて、薄肉円筒形状に形成されている。絶縁部材２
は、セラミック材料又は高分子材料を用いて、薄肉円筒
形状に形成されている。背極部材３は、金属等の導電性
部材を用いて、複数の孔を設けた円板形状に形成され、
中央には電極引き出し部６が設けられている。The housing member 1 is formed in a thin cylindrical shape using a conductive member such as a metal. Insulation member 2
Is formed in a thin cylindrical shape using a ceramic material or a polymer material. The back electrode member 3 is formed in a disc shape having a plurality of holes by using a conductive member such as a metal,
An electrode lead portion 6 is provided at the center.
【００１３】エッジ部４は、電鋳法によって、ハウジン
グ部材１の端面１ａ上にのみ、均一に厚さが２０〜３０
μｍになるように形成されている。振動膜５は、チタニ
ウムやステンレス鋼などの導電性を有する箔によって形
成され、張力が均一になるようにエッジ部４の端面に張
設されている。The edge portion 4 has a uniform thickness of 20 to 30 only on the end surface 1a of the housing member 1 by electroforming.
μm. The vibration film 5 is formed of a conductive foil such as titanium or stainless steel, and is stretched on the end surface of the edge portion 4 so that the tension is uniform.
【００１４】以上のような構成のコンデンサマイクロホ
ンの組立手順について説明する。 （１）はじめに、ハウジング部材１の内周に絶縁部材２
を圧入するか、又はエポキシ系等の接着剤を用いて固定
する。The procedure for assembling the condenser microphone having the above configuration will be described. (1) First, an insulating member 2 is provided on the inner periphery of the housing member 1.
Or fixed using an adhesive such as an epoxy-based adhesive.
【００１５】（２）次いで、絶縁部材２の内周に背極部
材３を圧入するか、又はエポキシ系等の接着剤を用いて
固定する。 以上のような工程を経た３つの部材１，２，３の組立物
は、図２に示すように、それぞれの端面１ａ，２ａ，３
ａが同一平面上にはない。(2) Next, the back electrode member 3 is press-fitted into the inner periphery of the insulating member 2 or fixed using an epoxy-based adhesive or the like. The assembly of the three members 1, 2, 3 having undergone the above-described steps is, as shown in FIG.
a is not on the same plane.
【００１６】（３）そこで、それぞれの端面１ａ，２
ａ，３ａが面一になるように、各端面１ａ，２ａ，３ａ
の研削加工を行う。(3) Then, each end face 1a, 2
a, 3a so that the end faces 1a, 2a, 3a
Grind.
【００１７】（４）研削を行った端面１ａ，２ａ，３ａ
のうちのハウジング部材１の端面１ａのみに電鋳法によ
って、所望の高さのエッジ部４を形成する。なお、エッ
ジ部４を所望の高さより僅かに高く電鋳法によって形成
した後、所望の高さにエッジ部４を研削加工をしてもよ
い。こうすれば、エッジ部４の端面の平坦度がよくな
り、高精度が要求されるコンデンサマイクロホンには望
ましい。(4) End faces 1a, 2a, 3a after grinding
The edge portion 4 having a desired height is formed only on the end surface 1a of the housing member 1 by electroforming. After forming the edge portion 4 slightly higher than the desired height by electroforming, the edge portion 4 may be ground to a desired height. This improves the flatness of the end face of the edge portion 4 and is desirable for a condenser microphone that requires high accuracy.
【００１８】（５）その後、輪状に形成されたエッジ部
４に振動膜５を張設する。すると、振動膜５と背極部材
３の端面３ａとの間に所望のギャップＧが形成される。(5) Thereafter, the vibrating film 5 is stretched on the edge portion 4 formed in a ring shape. Then, a desired gap G is formed between the vibration film 5 and the end surface 3a of the back electrode member 3.
【００１９】次に、本発明に係るコンデンサマイクロホ
ンの作用について説明する。ハウジング部材１、絶縁部
材２及び背極部材３を組み立てた後、各端面１ａ，２
ａ，３ａの平面出し加工を行い、その後ハウジング部材
１の端面１ａにのみ、電鋳法によってエッジ部４を形成
するようにしたので、振動膜５と背極部材３との間に所
望のギャップＧを形成することが極めて容易になる。Next, the operation of the condenser microphone according to the present invention will be described. After assembling the housing member 1, the insulating member 2, and the back electrode member 3, each end face 1a, 2
The edge portions 4 are formed by electroforming only on the end surface 1a of the housing member 1. Therefore, a desired gap is formed between the vibration film 5 and the back electrode member 3. It becomes extremely easy to form G.
【００２０】また、図３に示す従来のコンデンサマイク
ロホンと比べて、機械加工が単純化され、部品点数も少
なくすることができる。Further, as compared with the conventional condenser microphone shown in FIG. 3, machining is simplified and the number of parts can be reduced.
【００２１】なお、上述の実施の形態においては、直流
バイアス電圧を外部から供給する方式のコンデンサマイ
クロホンに本発明を適用した場合について述べた。しか
し、本発明はこれに限らず、背極部材の振動板と対向す
る面上にエレクトレットフィルムを配置した、いわゆる
エレクトレット型コンデンサマイクロホンにも適用でき
る。In the above-described embodiment, a case has been described in which the present invention is applied to a condenser microphone that supplies a DC bias voltage from the outside. However, the present invention is not limited to this, and can be applied to a so-called electret condenser microphone in which an electret film is disposed on a surface of the back electrode member facing the diaphragm.
【００２２】[0022]
【発明の効果】以上説明したように本発明によれば、部
品点数を削減でき、且つ組立作業が容易になる。As described above, according to the present invention, the number of parts can be reduced and the assembling work can be facilitated.
【００２３】また、エッジ部を電鋳法により形成するす
れば、背極部材と振動膜とのギャップ（間隙）出しを精
度良く容易に行うことができる。If the edge portion is formed by electroforming, a gap (gap) between the back electrode member and the diaphragm can be easily and accurately formed.
【図１】本発明に係るコンデンサマイクロホンの断面図FIG. 1 is a cross-sectional view of a condenser microphone according to the present invention.
【図２】本発明に係るコンデンサマイクロホンの組立説
明図FIG. 2 is an explanatory view for assembling a condenser microphone according to the present invention.
【図３】従来のコンデンサマイクロホンの一部断面図の
正面図FIG. 3 is a front view of a partial sectional view of a conventional condenser microphone.
１…ハウジング部材、１ａ…ハウジング部材の端面、２
…絶縁部材、２ａ…絶縁部材の端面、３…背極部材、３
ａ…背極部材の端面、４…エッジ部、５…振動膜、Ｇ…
ギャップ（間隙）。DESCRIPTION OF SYMBOLS 1 ... Housing member, 1a ... End surface of housing member, 2
... Insulating member, 2a ... End face of insulating member, 3 ... Back electrode member, 3
a: End face of back electrode member, 4: Edge part, 5: Vibration membrane, G ...
Gap.
Claims (2)
と、このハウジング部材の内周に固定した筒状の絶縁部
材と、この絶縁部材の内周に固定した背極部材と、前記
ハウジング部材の端面に突出形成したエッジ部と、前記
背極部材との間に所定の間隙を設けて前記エッジ部に張
設した導電性を有する振動膜とを備えて構成することを
特徴とするコンデンサマイクロホン。1. A cylindrical housing member having conductivity, a cylindrical insulating member fixed to an inner periphery of the housing member, a back electrode member fixed to an inner periphery of the insulating member, A capacitor microphone comprising: an edge protruding from an end face; and a conductive diaphragm stretched over the edge with a predetermined gap provided between the back electrode and the back pole member.
請求項１記載のコンデンサマイクロホン。2. The condenser microphone according to claim 1, wherein the edge portion is formed by an electroforming method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23812897A JP3371394B2 (en) | 1997-09-03 | 1997-09-03 | Condenser microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23812897A JP3371394B2 (en) | 1997-09-03 | 1997-09-03 | Condenser microphone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1188988A true JPH1188988A (en) | 1999-03-30 |
| JP3371394B2 JP3371394B2 (en) | 2003-01-27 |
Family
ID=17025607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23812897A Expired - Fee Related JP3371394B2 (en) | 1997-09-03 | 1997-09-03 | Condenser microphone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3371394B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006203749A (en) * | 2005-01-24 | 2006-08-03 | Audio Technica Corp | Electrostatic type electroacoustic transducer, condenser microphone using the same, and manufacturing method of electrostatic type electroacoustic transducer |
-
1997
- 1997-09-03 JP JP23812897A patent/JP3371394B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006203749A (en) * | 2005-01-24 | 2006-08-03 | Audio Technica Corp | Electrostatic type electroacoustic transducer, condenser microphone using the same, and manufacturing method of electrostatic type electroacoustic transducer |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3371394B2 (en) | 2003-01-27 |
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