JPH0715263Y2 - Microphone - Google Patents
MicrophoneInfo
- Publication number
- JPH0715263Y2 JPH0715263Y2 JP1990006327U JP632790U JPH0715263Y2 JP H0715263 Y2 JPH0715263 Y2 JP H0715263Y2 JP 1990006327 U JP1990006327 U JP 1990006327U JP 632790 U JP632790 U JP 632790U JP H0715263 Y2 JPH0715263 Y2 JP H0715263Y2
- Authority
- JP
- Japan
- Prior art keywords
- microphone
- axis
- vibration
- housing
- holder
- 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
Landscapes
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Description
【考案の詳細な説明】 「産業上の利用分野」 この考案はビデオカメラ等に装着され、装置の機械的振
動の影響によるノイズを軽減した所謂ノイズキャンセル
型マイクロホンの改良に関する。DETAILED DESCRIPTION OF THE INVENTION "Industrial field of application" The present invention relates to an improvement of a so-called noise canceling microphone mounted on a video camera or the like to reduce noise due to the influence of mechanical vibration of the device.
「従来の技術及び考案が解決しようとする課題」 ビデオカメラ等に用いるマイクロホンでは、ビデオカメ
ラより伝わる機械的振動によって、マイクロホンの振動
板が振動し、雑音を発生するのを防ぐために、ノイズキ
ャンセル型マイクロホンを用いる場合がある。第２図に
示すように、同マイクロホンでは電気的にも機構的にも
ほぼ同じ特性の、例えばエレクトレット、コンデンサマ
イクロホンユニット１、２がその前面を所定間隔で同軸
心（軸心方向をＺ軸とする）に対向して配される。マイ
クロホンユニット１の出力端子1a,1bはリード線l1，l2
を介してマイクロホンユニット２の出力端子2a,2bにそ
れぞれ接続され、マイクロホンユニット２の出力端子2
a,2bはリード線l3，l4を介して外部出力端子3a,3bにそ
れぞれ接続される。"Problems to be solved by conventional techniques and devices" In a microphone used for a video camera or the like, in order to prevent the diaphragm of the microphone from vibrating due to mechanical vibration transmitted from the video camera, a noise canceling type A microphone may be used. As shown in FIG. 2, in the same microphone, for example, an electret and condenser microphone units 1 and 2 having substantially the same electrical and mechanical characteristics have coaxial centers (the Z axis is the axis center direction) at their front faces at predetermined intervals. It is placed opposite to. The output terminals 1a and 1b of the microphone unit 1 are lead wires l 1 and l 2
Connected to the output terminals 2a and 2b of the microphone unit 2 via the
a, 2b are connected via a lead wire l 3, l 4 external output terminal 3a, the 3b.
いま、Ｚ軸上の、対向するマイクロホンユニットの中間
点と直交する方向にある音源４からの音波によって生ず
る各マイクロホンユニットの振動板の振動を考えると、
各振動はＺ軸方向に同じ大きさで同位相である。従っ
て、並列に接続されている各マイクロホンユニット1,2
の出力も同位相で加えられる。Now, considering the vibration of the diaphragm of each microphone unit caused by the sound wave from the sound source 4 in the direction orthogonal to the midpoint of the facing microphone unit on the Z axis,
Each vibration has the same magnitude and the same phase in the Z-axis direction. Therefore, each microphone unit 1, 2 connected in parallel
The output of is also added in phase.
ところで、マイクロホンユニット1,2は図示していない
が、マイクホルダに保持され、そのマイクホルダはマイ
クロホンのハウジングに収容され、それらマイクホルダ
とハウジングとの間に防振部が介在され、ビデオカメラ
の機械的振動がマイクロホンユニットに伝わるのを防止
している。しかしながら、それらハウジング、防振部及
びマイクホルダはそれそぞれ独立した部品として作られ
るため、部品点数が多くなり、金型費がかさみ、組立工
数が大きくなる難点があった。By the way, although not shown, the microphone units 1 and 2 are held by a microphone holder, and the microphone holder is housed in the housing of the microphone, and a vibration isolator is interposed between the microphone holder and the housing, and Prevents mechanical vibration from being transmitted to the microphone unit. However, since the housing, the vibration isolator, and the microphone holder are made as independent parts, respectively, the number of parts is increased, the die cost is increased, and the assembly man-hour is increased.
また、されらハウジング、防振部及びマイクホルダを含
めた全体としての防振効果は数デシベル程度であるの
で、必ずビデオカメラの振動がマイクロホンユニットに
加えられ、振動板が振動する。各マイクロホンユニット
Ｚ軸方向に互いに逆向きであるから、カメラのＺ軸方向
の振動に対しては、両振動板の特性は逆位相で、大きさ
もそろうので、それぞれの電気的出力は相殺される。し
かしながらビデオカメラのあらゆる方向の振動に対して
両マイクロホンユニットの特性をそろえることは困難で
あると共に、両振動板に伝わる振動には僅かの相違があ
るため、両マイクロホンユニットの出力は十分相殺され
ず、このためマイクロホンの出力端子3a,3b間にはビデ
オカメラの振動の影響による雑音成分が存在し、信号の
S/N比を低下させる。Moreover, since the overall vibration-proofing effect including the housing, the vibration-proofing part, and the microphone holder is about several decibels, the vibration of the video camera is always applied to the microphone unit and the diaphragm vibrates. Since the microphone units are opposite to each other in the Z-axis direction, the characteristics of both diaphragms have opposite phases and the sizes are the same with respect to the vibration of the camera in the Z-axis direction, so that the respective electrical outputs are canceled. . However, it is difficult to match the characteristics of both microphone units with respect to the vibration of the video camera in all directions, and the vibrations transmitted to both diaphragms have a slight difference, so the outputs of both microphone units are not sufficiently canceled out. , Therefore, there is a noise component between the output terminals 3a and 3b of the microphone due to the influence of the vibration of the video camera.
Reduce the S / N ratio.
この考案の目的は、従来より金型費や組立工数が少なく
て済み、またビデオカメラの機械的振動の影響を従来よ
り大幅に軽減できる優れたマイクロホンを提供すること
にある。An object of the present invention is to provide an excellent microphone that requires less die cost and assembly man-hours than before, and can significantly reduce the influence of mechanical vibration of the video camera as compared with the conventional microphone.
「課題を解決するための手段」 （１）この考案のマイクロホンは、ほぼ同じ特性をも
ち、互いに電気的に並列に接続され、前面を互いに所定
の間隔で同軸心に対向させて配される２個のマイクロホ
ンユニットと、 それらのマイクロホンユニットを保持する防振材より成
るマイクホルダと、 そのマイクホルダを収容する防振材より成るハウジング
と、 Ｘ軸、Ｙ軸及びＺ軸より成る直交座標の任意の一軸を上
記マイクロホンユニットの軸心方向とするとき、上記マ
イクホルダの外壁から上記Ｘ軸、Ｙ軸及びＺ軸にそれぞ
れ平行な各腕辺を縦続に一体に連結して構成されて、上
記ハウジングの内壁に連結される防振材より成る複数の
防振アームとを具備し、 上記マイクホルダ、ハウジング及び防振アームが一体の
一つの部品として構成される。"Means for Solving the Problems" (1) The microphones of the present invention have substantially the same characteristics, are electrically connected in parallel to each other, and are arranged such that their front surfaces are coaxially opposed to each other at a predetermined interval. Individual microphone units, a microphone holder made of a vibration-proof material for holding those microphone units, a housing made of a vibration-proof material for housing the microphone holders, and an arbitrary orthogonal coordinate system made of the X-axis, Y-axis, and Z-axis. When one axis is in the axial direction of the microphone unit, the arm walls parallel to the X-axis, the Y-axis, and the Z-axis are integrally connected in cascade from the outer wall of the microphone holder to form the housing. A plurality of anti-vibration arms made of anti-vibration material connected to the inner wall of the microphone holder, the housing, and the anti-vibration arm are integrated into one component.
「実施例」 第１図に示すように、ほぼ同じ特性をもつ、円柱状の２
個のマイクロホンユニット（例えばエレクトレット、コ
ンデンサマイクロホンユニット）1,2が所定の間隔でＺ
軸方向に同軸心に対向され、アース板５に保持される。
アース板５は真鍮（しんちゅう）により半円筒状に作ら
れ、組立てられたマイクロホンの前面が向う方向（Ｘ軸
方向とする）に窓5aが形成される。窓5aのＺ軸方向の幅
は対向するマイクロホンユニット1,2の間隔にほぼ等し
い。アース板５の上側縁の中央よりアース端子5bがＸ軸
方向と逆方向に突出形成される。またアース板５の両端
の半円弧状の周縁より、それぞれ舌片5cが突出形成さ
れ、Ｘ軸と逆方向に折り曲げられる。従来例と同様にそ
れらの舌片5cはそれぞれマイクロホンユニット1,2の背
面の一方の出力端子1b（図示せず）、2bに半田付され、
他方の出力端子1a（図示せず）、2aはリード線l1で互い
に接続され、更に出力端子2a（又は1a）にリード線l3の
一端が半田付される。[Example] As shown in FIG. 1, a cylindrical column 2 having almost the same characteristics.
A number of microphone units (eg electret, condenser microphone unit) 1 and 2 are set at a predetermined interval.
It is coaxially opposed in the axial direction and is held by the ground plate 5.
The ground plate 5 is made of brass in a semi-cylindrical shape, and a window 5a is formed in the direction (the X-axis direction) facing the front surface of the assembled microphone. The width of the window 5a in the Z-axis direction is almost equal to the distance between the microphone units 1 and 2 facing each other. A ground terminal 5b is formed so as to project from the center of the upper edge of the ground plate 5 in the direction opposite to the X-axis direction. Further, tongues 5c are respectively formed to project from the semicircular edges of both ends of the earth plate 5 and are bent in the direction opposite to the X axis. Similar to the conventional example, those tongue pieces 5c are soldered to the output terminals 1b (not shown) and 2b on one of the rear surfaces of the microphone units 1 and 2, respectively.
The other output terminals 1a (not shown) and 2a are connected to each other by a lead wire l 1 , and one end of a lead wire l 3 is soldered to the output terminal 2a (or 1a).
アース板５の内面に取付けられたマイクロホンユニット
1,2はリード線l1と共にゴム状防振材より成る箱形のマ
イクホルダ６に保持される。この例では、マイクホルダ
６は、両端が閉塞された中空円筒をその中心軸に平行で
中心軸より多少外れた平面で、周壁及び両端面の一部を
カットして除いたような形状に形成される。従って、マ
イクホルダ６には中心軸方向に沿う開口が形成され、そ
の開口をＸ軸方向に向けた状態でハウジング７内に収容
される。マイクロホンユニット1,2はアース板の窓5aを
Ｘ軸方向に向けた状態でマイクホルダ６の開口より内部
に挿入され、弾性的に保持される。Microphone unit mounted on the inner surface of ground plate 5
1, 2 are held together with the lead wire l 1 in a box-shaped microphone holder 6 made of a rubber vibration isolator. In this example, the microphone holder 6 is formed in a shape in which a hollow cylinder whose both ends are closed is a plane parallel to the central axis and slightly offset from the central axis, and the peripheral wall and both end surfaces are partially cut and removed. To be done. Therefore, an opening is formed in the microphone holder 6 along the central axis direction, and the microphone holder 6 is housed in the housing 7 with the opening facing the X axis direction. The microphone units 1 and 2 are inserted inside the opening of the microphone holder 6 with the window 5a of the ground plate facing the X-axis direction, and are elastically held.
アース板のアース端子5b及びリード線l3はマイクホルダ
６の周壁に設けられている小孔より外部に導出され、ア
ース端子5bにリード線l4が半田付される。Ground terminal 5b and the lead wire l 3 of the ground plate is extended to the outside from the small holes provided in the peripheral wall of the microphone holder 6, the lead wire l 4 is soldered to the ground terminal 5b.
ハウジング７はゴム状防振材より成り、両端が開口とさ
れ、概ね角筒状に形成される。マイクホルダ６はその開
口面がハウジング７の開口面と平行となるように、ハウ
ジングの中空部に、ゴム状防振材より成る防振アーム８
により弾性的に保持される。防振アーム８は４個あり、
それぞれ直交座標のＹ軸,Z軸及びＸ軸に平行な腕辺が順
次縦続に一体に連絡されたものであり、その各防振アー
ムの一端はマイクホルダ６の外周面に、他端はハウジン
グ７の内面に一体に連結される。このように、この考案
ではマイクホルダ６、ハウジング７及び防振アーム８は
一体に連結され、一つの部品として構成される。The housing 7 is made of a rubber vibration-proof material, has openings at both ends, and is formed into a substantially rectangular tube shape. The microphone holder 6 has a vibration-proof arm 8 made of rubber-like vibration-proof material in the hollow portion of the housing so that its opening surface is parallel to the opening surface of the housing 7.
Is elastically held by. There are four anti-vibration arms 8,
Arm sides parallel to the Y-axis, Z-axis, and X-axis of Cartesian coordinates are sequentially and integrally connected to each other. One end of each anti-vibration arm is on the outer peripheral surface of the microphone holder 6, and the other end is the housing. It is integrally connected to the inner surface of 7. As described above, in the present invention, the microphone holder 6, the housing 7 and the anti-vibration arm 8 are integrally connected and configured as one component.
ハウジング７の背面側の端縁に沿って形成された溝12に
プリント基板９の周縁を係合させて、取り付ける。プリ
ント基板９の上下の辺に形成されたスリット10,11にそ
れぞれリード線l4，l3を通して、プリント基板９の背面
の出力端子3a,3bを構成する電極パターンにそれぞれ半
田付する。The peripheral edge of the printed circuit board 9 is engaged with the groove 12 formed along the rear side edge of the housing 7 to be attached. The lead wires l 4 and l 3 are respectively passed through slits 10 and 11 formed on the upper and lower sides of the printed board 9 to be soldered to the electrode patterns forming the output terminals 3a and 3b on the back surface of the printed board 9.
ハウジング７の前端（Ｘ軸方向）の内周面は他部より薄
く形成され、両者の間に段部13が形成される。フロント
金網14の内面に不織布より成るフロントクロス15を当て
がい、ハウジング７の前端の内周面に圧入し、フロント
金網14の端縁を段部13に当接させて取り付け、これによ
りマイクロホンの組立が完了する。The inner peripheral surface of the front end (X-axis direction) of the housing 7 is formed thinner than other portions, and a step portion 13 is formed between the both. A front cloth 15 made of a non-woven fabric is applied to the inner surface of the front wire netting 14 and press-fitted onto the inner peripheral surface of the front end of the housing 7 so that the end edge of the front wire netting 14 is brought into contact with the step portion 13 to thereby attach the microphone. Is completed.
「考案の効果」 この考案によれば、マイクホルダ６、ハウジング７及び
防振アーム８は一つの部品として一体に構成され、部品
点数が少ないので金型費、及び組立工数を従来よりかな
り低減できる。[Advantage of Invention] According to this invention, the microphone holder 6, the housing 7 and the anti-vibration arm 8 are integrally formed as one component, and the number of components is small, so that the die cost and the assembly man-hour can be considerably reduced from the conventional one. .
また従来のように防振部だけでなくマイクホルダ６、ハ
ウジング７及び防振アーム８を全て同じ防振材で一体に
構成するのて、防振効果に優れ、ビデオカメラ等の機械
的振動の影響を従来より大幅に低減できる。防振アーム
８をＸ軸,Y軸及びＺ軸に平行な腕辺を縦続して構成して
いるので、ビデオカメラ等のあらゆる方向の振動を減衰
でき、優れた防振効果が得られる。Further, not only the conventional vibration isolator but also the microphone holder 6, the housing 7, and the anti-vibration arm 8 are integrally formed of the same anti-vibration material, which is excellent in the anti-vibration effect and prevents the mechanical vibration of the video camera or the like. The effect can be greatly reduced compared to the past. Since the anti-vibration arm 8 is constructed by cascading arm sides parallel to the X-axis, Y-axis and Z-axis, vibrations in all directions of the video camera and the like can be attenuated and an excellent anti-vibration effect can be obtained.
なお、この考案のマイクロホンはビデオカメラに限らず
テープレコーダ、その他の音響装置に広く利用できるも
のである。The microphone of the present invention can be widely used not only for video cameras but also for tape recorders and other audio devices.
第１図はこの考案の実施例の分解斜視図、第２図は従来
のノイズキャンセル型マイクロホンの原理的な構成を示
す図である。FIG. 1 is an exploded perspective view of an embodiment of the present invention, and FIG. 2 is a view showing a principle structure of a conventional noise canceling microphone.
Claims (1)
に接続され、前面を互いに所定の間隔で同軸心に対向さ
せて配される２個のマイクロホンユニットと、 それらのマイクロホンユニットを保持する防振材より成
るマイクホルダと、 そのマイクホルダを収容する防振材より成るハウジング
と、 Ｘ軸、Ｙ軸及びＺ軸より成る直交座標の任意の一軸を上
記マイクロホンユニットの軸心方向とするとき、上記マ
イクホルダの外壁から上記Ｘ軸、Ｙ軸及びＺ軸にそれぞ
れ平行な各腕辺を縦続に一体に連結して構成されて、上
記ハウジングの内壁に連結される防振材より成る複数の
防振アームとを具備し、 上記マイクホルダ、ハウジング及び防振アームが一体の
一つの部品として構成されていることを特徴とする、 マイクロホン。1. Two microphone units having substantially the same characteristics, electrically connected in parallel to each other, and arranged so that their front faces are coaxially opposed to each other at a predetermined distance, and hold these microphone units. When a microphone holder made of a vibration isolating material, a housing made of a vibration isolating material for accommodating the microphone holder, and an arbitrary one of orthogonal coordinates of the X axis, the Y axis, and the Z axis is the axial center direction of the microphone unit. A plurality of vibration damping members that are connected to the inner wall of the housing by integrally connecting the respective arm sides parallel to the X axis, the Y axis, and the Z axis from the outer wall of the microphone holder in a cascade connection. A microphone, comprising: a vibration isolation arm, wherein the microphone holder, the housing, and the vibration isolation arm are configured as one integrated component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990006327U JPH0715263Y2 (en) | 1990-01-26 | 1990-01-26 | Microphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990006327U JPH0715263Y2 (en) | 1990-01-26 | 1990-01-26 | Microphone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0398594U JPH0398594U (en) | 1991-10-14 |
| JPH0715263Y2 true JPH0715263Y2 (en) | 1995-04-10 |
Family
ID=31510004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990006327U Expired - Lifetime JPH0715263Y2 (en) | 1990-01-26 | 1990-01-26 | Microphone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0715263Y2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002204491A (en) * | 2000-12-28 | 2002-07-19 | Audio Technica Corp | Microphone holder |
| WO2019146096A1 (en) | 2018-01-29 | 2019-08-01 | ヤマハ株式会社 | Audio output device |
| WO2019146095A1 (en) | 2018-01-29 | 2019-08-01 | ヤマハ株式会社 | Audio output device |
| CN113658579B (en) * | 2021-09-18 | 2024-01-30 | 重庆紫光华山智安科技有限公司 | Audio signal processing method, device, electronic equipment and readable storage medium |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01126684U (en) * | 1987-10-26 | 1989-08-30 |
-
1990
- 1990-01-26 JP JP1990006327U patent/JPH0715263Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0398594U (en) | 1991-10-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |