JPS6325821Y2 - - Google Patents
Info
- Publication number
- JPS6325821Y2 JPS6325821Y2 JP18698482U JP18698482U JPS6325821Y2 JP S6325821 Y2 JPS6325821 Y2 JP S6325821Y2 JP 18698482 U JP18698482 U JP 18698482U JP 18698482 U JP18698482 U JP 18698482U JP S6325821 Y2 JPS6325821 Y2 JP S6325821Y2
- Authority
- JP
- Japan
- Prior art keywords
- air chamber
- rear air
- microphone unit
- gap
- diaphragm
- 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
Links
- 239000000463 material Substances 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
本考案は後部気室を内蔵した指向性ダイナミツ
クマイクロホンユニツトに関するものである。[Detailed Description of the Invention] Industrial Application Field The present invention relates to a directional dynamic microphone unit with a built-in rear air chamber.
従来例の構成とその問題点
第１図は従来の後部気室を内蔵した指向性ダイ
ナミツクマイクロホンユニツトの断面図を示すも
ので、共振周波数0及び共振周波数0に於けるＱ
は振動板１のスチフネス、振動板１に貼付けられ
たボイスコイル２の質量、磁気ヨーク３の内部気
室４及び後部気室５の付加質量にて決定づけられ
るものであるが、振動板１のスチフネスを小さく
するためには振動板１を薄くする必要が生じるが
不安定なものとなる。一方ボイスコイル２の質量
を増すことは感度低下を招き不利であり、また内
部気室４及び後部気室５の付加質量を増すために
は大形化しなければならないという欠点がある。Conventional configuration and its problems Figure 1 shows a cross- sectional view of a conventional directional dynamic microphone unit with a built - in rear air chamber.
is determined by the stiffness of the diaphragm 1, the mass of the voice coil 2 attached to the diaphragm 1, and the additional mass of the internal air chamber 4 and rear air chamber 5 of the magnetic yoke 3. In order to reduce the diaphragm 1, it is necessary to make the diaphragm 1 thinner, but it becomes unstable. On the other hand, increasing the mass of the voice coil 2 is disadvantageous because it causes a decrease in sensitivity, and there is also the disadvantage that increasing the additional mass of the internal air chamber 4 and the rear air chamber 5 requires increasing the size.
考案の目的
本考案はこのような欠点を除去し、広帯域で高
感度の指向性ダイナミツクマイクロホンユニツト
を得ることを目的とするものである。Purpose of the invention The purpose of the present invention is to eliminate such drawbacks and to obtain a directional dynamic microphone unit with a wide band and high sensitivity.
考案の構成
本考案は以上の目的を達成するために後部気室
の外壁の一部に付加質量を有する隙間を設けるこ
とにより、振動系の質量及び後部気室の容積を増
すことなく共振周波数0を低くすると同時に、共
振周波数0に於けるＱを高くするものである。Structure of the invention In order to achieve the above objectives, the present invention provides a gap with additional mass in a part of the outer wall of the rear air chamber, thereby reducing the resonance frequency to 0 without increasing the mass of the vibration system and the volume of the rear air chamber. At the same time, the Q at resonance frequency 0 is increased.
実施例の説明
以下本考案の一実施例を第２図、第３図を参照
しながら説明する。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 and 3.
第２図において、６は振動板、７は振動板６に
貼付けられたボイスコイル、８は磁極片、９は磁
石、１０は磁気ヨーク、１１は磁極片８、磁石９
磁気ヨーク１０を固定する合成樹脂の固定部、１
２は音響抵抗材、１３は合成樹脂の固定部１１と
音響抵抗材１２にて形成される内部気室、１４は
ケース、１５は端子板、１６はケース１４と端子
板１５にて形成される後部気室、１７はケース１
４と端子板１５にて形成される付加質量を有する
隙間である。 In FIG. 2, 6 is a diaphragm, 7 is a voice coil attached to the diaphragm 6, 8 is a magnetic pole piece, 9 is a magnet, 10 is a magnetic yoke, 11 is a magnetic pole piece 8, a magnet 9
A synthetic resin fixing part for fixing the magnetic yoke 10, 1
2 is an acoustic resistance material, 13 is an internal air chamber formed by the synthetic resin fixing part 11 and the acoustic resistance material 12, 14 is a case, 15 is a terminal plate, and 16 is formed by the case 14 and the terminal plate 15. Rear air chamber, 17 is case 1
4 and the terminal plate 15 is a gap having additional mass.
上記のような構成にすると、ケース１４と端子
板１５によつて形成される隙間１７の付加質量に
より共振周波数0を低くできると同時に、共振周
波数0に於けるＱを高くでき、比較的小形にして
広帯域、高感度の指向性ダイナミツクマイクロホ
ンユニツトが得られる。 With the above configuration, the resonance frequency 0 can be lowered by the additional mass of the gap 17 formed by the case 14 and the terminal plate 15, and at the same time, the Q at the resonance frequency 0 can be increased, making it relatively compact. As a result, a broadband, highly sensitive directional dynamic microphone unit can be obtained.
第３図において、１８は従来例に於ける周波数
特性であり、１９は本考案の一実施例における周
波数特性である。 In FIG. 3, 18 is the frequency characteristic in the conventional example, and 19 is the frequency characteristic in one embodiment of the present invention.
なお、隙間１７は、ケース１４の形成時にあら
かじめ形成でき製造上も複雑になることはない。 Incidentally, the gap 17 can be formed in advance when forming the case 14, and manufacturing is not complicated.
考案の効果
以上の様に本考案によれば後部気室の外壁の一
部に付加質量となる隙間を設けることにより、振
動系の質量及び後部気室の容積を増すことなく広
帯域で高感度の指向性ダイナミツクマイクロホン
ユニツトを実現することが出来るものである。Effects of the device As described above, according to the present invention, by providing a gap that serves as additional mass in a part of the outer wall of the rear air chamber, a wide band and high sensitivity can be achieved without increasing the mass of the vibration system or the volume of the rear air chamber. This makes it possible to realize a directional dynamic microphone unit.
第１図は従来の指向性ダイナミツクマイクロホ
ンユニツトの側断面図、第２図は本考案の一実施
例における指向性ダイナミツクマイクロホンユニ
ツトの側断面図、第３図は同周波数特性図であ
る。
６……振動板、７……ボイスコイル、１１……
固定部、１２……音響抵抗材、１３……内部気
室、１４……ケース、１５……端子板、１６……
後部気室、１７……隙間。
FIG. 1 is a side sectional view of a conventional directional dynamic microphone unit, FIG. 2 is a side sectional view of a directional dynamic microphone unit according to an embodiment of the present invention, and FIG. 3 is a frequency characteristic diagram of the same. 6...Diaphragm, 7...Voice coil, 11...
Fixed part, 12... Acoustic resistance material, 13... Internal air chamber, 14... Case, 15... Terminal board, 16...
Rear air chamber, 17... gap.
Claims (1)
ることなくその外壁の一部に付加質量となる隙間
を設けた指向性ダイナミツクマイクロホンユニツ
ト。 A directional dynamic microphone unit having a built-in rear air chamber and having a gap for adding mass to a part of the outer wall of the rear air chamber without changing the volume of the rear air chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18698482U JPS5991093U (en) | 1982-12-09 | 1982-12-09 | Directional dynamic microphone unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18698482U JPS5991093U (en) | 1982-12-09 | 1982-12-09 | Directional dynamic microphone unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5991093U JPS5991093U (en) | 1984-06-20 |
| JPS6325821Y2 true JPS6325821Y2 (en) | 1988-07-13 |
Family
ID=30403733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18698482U Granted JPS5991093U (en) | 1982-12-09 | 1982-12-09 | Directional dynamic microphone unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5991093U (en) |
-
1982
- 1982-12-09 JP JP18698482U patent/JPS5991093U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5991093U (en) | 1984-06-20 |
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