JPH0219680B2 - - Google Patents
Info
- Publication number
- JPH0219680B2 JPH0219680B2 JP29188587A JP29188587A JPH0219680B2 JP H0219680 B2 JPH0219680 B2 JP H0219680B2 JP 29188587 A JP29188587 A JP 29188587A JP 29188587 A JP29188587 A JP 29188587A JP H0219680 B2 JPH0219680 B2 JP H0219680B2
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- porous body
- soft porous
- holder
- speaker
- 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
- 239000011148 porous material Substances 0.000 claims 1
- 230000001052 transient effect Effects 0.000 description 7
- 238000013016 damping Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011358 absorbing material Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 229920001821 foam rubber Polymers 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
Landscapes
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、振動板に音響抵抗器を設けたスピー
カに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a speaker in which an acoustic resistor is provided on a diaphragm.
従来、一般にコーン・スピーカ又はドーム・ス
ピーカでは、主にボイス・コイルに発生する電磁
力によつて制動を行なつてスピーカの周波性特性
及び過渡特性の改善を計つている。
Conventionally, in cone speakers or dome speakers, damping is performed mainly by electromagnetic force generated in the voice coil in order to improve the frequency characteristics and transient characteristics of the speaker.
コイルの電磁力による制動の場合、ネツトワー
クやアツテネータを通してアンプに接続して使用
すると、一定の周波数領域で制動力が減少し、制
動不足となり、過渡特性が劣化する欠点がある。 In the case of braking using the electromagnetic force of a coil, if it is connected to an amplifier through a network or an attenuator, the braking force decreases in a certain frequency range, resulting in insufficient braking and deterioration of transient characteristics.
ハード・ドームの高域分割振動及び振動板が一
体となつて動くピストン振動の制動方法として振
動板の裏側に発泡ゴム等を貼付したり、振動板の
裏側の空間に柔らかい吸音材を振動板に触れさせ
て入れ、制動抵抗として働かせたりするものが知
られているが周波数特性及び過渡特性の改善には
余り効果的ではなかつた。 As a method of damping the high-frequency division vibration of the hard dome and the piston vibration that occurs when the diaphragm moves in unison, foam rubber, etc. may be pasted on the back side of the diaphragm, or soft sound-absorbing material may be placed in the space behind the diaphragm as a diaphragm. It is known that the material is placed in contact with the material to act as a braking resistance, but it is not very effective in improving frequency characteristics and transient characteristics.
又、特開昭54−150121号公報には、振動板上に
粘弾性体を介して機械素子を取り付け、これによ
り振動板の分割共振を防止する技術が開示されて
いる。 Further, Japanese Patent Application Laid-Open No. 150121/1983 discloses a technique for attaching a mechanical element to a diaphragm via a viscoelastic body, thereby preventing split resonance of the diaphragm.
又、実開昭56−6192号公報には、中心孔を有す
る円板状をなし、その内周が振動板の外周に固着
され、外周がフレームに固着された通気性と吸音
特性を有する弾性材を備えたことを特徴とするス
ピーカが示されている。 In addition, Japanese Utility Model Application Publication No. 56-6192 discloses an elastic material having air permeability and sound absorption properties, which has a disk shape with a center hole, the inner periphery of which is fixed to the outer periphery of the diaphragm, and the outer periphery of which is fixed to the frame. A speaker is shown characterized in that it includes a material.
又、実開昭54−181924号公報には、平板スピー
カに於いて吸音性の弾性材料により平板で環状に
形成され外径が平板状振動板の外径より小さく、
内径がボイスコイルの外径より大きい支持部材
を、上記平板状振動板とフレームとの間に挿入、
両面を接着し、振動板の横振れを防止し、かつ、
フレームと振動板との間の定在波を吸収する技術
が示されている。 In addition, Japanese Utility Model Application Publication No. 54-181924 discloses a flat plate speaker which is made of a sound-absorbing elastic material and is formed into a flat ring shape, and whose outer diameter is smaller than the outer diameter of a flat diaphragm.
inserting a support member whose inner diameter is larger than the outer diameter of the voice coil between the flat diaphragm and the frame;
Adhesive on both sides to prevent lateral vibration of the diaphragm, and
Techniques are shown to absorb standing waves between the frame and the diaphragm.
然しながら、この種の考案は、いずれも振動板
に対する音響抵抗を好適とするものではなく、
又、振動板の等価質量を増大させるためスピーカ
の高域周波数特性及び過渡特性が悪くなり音響歪
みを生ずると云う問題点があつた。 However, none of these types of designs suitably provide acoustic resistance to the diaphragm;
Furthermore, since the equivalent mass of the diaphragm is increased, the high frequency characteristics and transient characteristics of the speaker deteriorate, resulting in acoustic distortion.
本発明は、叙上の観点に立つてなされたもので
あり、本発明の目的をとするところは、周波数特
性及び過渡特性を大幅に向上させると共に、特に
振動体の振動幅が大きい場合の音響歪みを防止
し、その音響効率を一段と良好にさせることがで
きる音響抵抗器を振動板に具えるスピーカを提供
することにある。
The present invention has been made based on the above-mentioned viewpoints, and an object of the present invention is to significantly improve frequency characteristics and transient characteristics, and to improve acoustics especially when the vibration width of a vibrating body is large. An object of the present invention is to provide a speaker equipped with an acoustic resistor on a diaphragm that can prevent distortion and further improve its acoustic efficiency.
而して、本発明の目的は、
振動板に略平行にホルダーを固定して設け、こ
のホルダーと振動板との間に軟質多孔体を設けて
成る音響抵抗器を具備するスピーカに於いて、
上記ホルダーに透孔を設け、ホルダーと振動板
との間には上記透孔を囲繞するよう環状に第１の
軟質多孔体を設けると共に、上記透孔を上記第１
の軟質多孔体より低密度の第２の軟質多孔体で閉
塞したことを特徴とする上記のスピーカによつて
達成される。
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a speaker equipped with an acoustic resistor in which a holder is fixedly provided substantially parallel to a diaphragm, and a soft porous body is provided between the holder and the diaphragm. A through hole is provided in the holder, and a first soft porous body is provided in an annular shape between the holder and the diaphragm so as to surround the through hole.
This is achieved by the above-mentioned speaker characterized in that the second soft porous body is closed with a second soft porous body having a lower density than the second soft porous body.
叙上の如く構成することにより、上記振動板と
上記ホルダー間に設けられた第１の軟質多孔体を
介してホルダーの透孔に設けられた低密度の第２
の軟質多孔体により特に振動板の振動幅が大きい
場合の音響歪みを防止して、周波数特性及び過渡
特性を大幅に向上させることができる。
By configuring as described above, the low-density second porous body provided in the through hole of the holder is inserted through the first soft porous body provided between the diaphragm and the holder.
The soft porous body prevents acoustic distortion, especially when the vibration width of the diaphragm is large, and can significantly improve frequency characteristics and transient characteristics.
而して、振動板が振動すると、ホルダーと振動
板と第１、第２の軟質多孔体とで囲まれた空間の
容積が周期的に変動することになり、その際、軟
質多孔体中で空気の流動を生じそのため、流動抵
抗力が発生し、振動板に制動力を及ぼす。第１の
軟質多孔体自身は振動板が動くと圧縮等の変形を
受け、振動板の振幅が大きい場合、第１の軟質多
孔体中での流動抵抗値が変化するので、第２の軟
質多孔体が充填されている空気の流通路を設けら
れていないと、発生する制動力が過大となつて歪
みの原因となる。しかし、本発明に於いては低密
度の第２の多孔体がもうけられており、これは振
動板の振動による変形を受けずこの抵抗値が一定
であるので、この方式の音響抵抗器は、振動板の
振幅が大きい場合でも歪みの発生することなく適
切な制動力を発生させることができる。 When the diaphragm vibrates, the volume of the space surrounded by the holder, the diaphragm, and the first and second soft porous bodies changes periodically. Air flows, which generates a flow resistance force that exerts a braking force on the diaphragm. The first soft porous body itself undergoes deformation such as compression when the diaphragm moves, and when the amplitude of the diaphragm is large, the flow resistance value in the first soft porous body changes. If the body is not provided with a flow path for the air filling it, the braking force generated will be excessive and cause distortion. However, in the present invention, a low-density second porous body is provided, and this resistance value is constant without being deformed by the vibration of the diaphragm. Appropriate braking force can be generated without distortion even when the amplitude of the diaphragm is large.
即ち、本発明にかゝる音響抵抗器の特徴は、ホ
ルダーの透孔に第１の軟質多孔体より低密度の第
２の軟質多孔体を設けることにより振動板の振動
により発生する空気の流れの大部分を第２の軟質
多孔体中の空気の流れとし、これにより振動板を
制動し、しかも上記低密度の第２の軟質多孔体は
振動板が動いても圧縮等の変形を受けず振動板の
振動幅が大きい場合であつても第２の軟質多孔体
中での流動抵抗値を一定に保ち、周波数特性を向
上させ得るようにしたものである。 That is, the feature of the acoustic resistor according to the present invention is that by providing a second soft porous body having a lower density than the first soft porous body in the through hole of the holder, the air flow generated by the vibration of the diaphragm can be reduced. Most of the air flows through the second soft porous body, thereby damping the diaphragm, and the low-density second soft porous body does not undergo deformation such as compression even when the diaphragm moves. Even when the vibration width of the diaphragm is large, the flow resistance value in the second soft porous body can be kept constant and the frequency characteristics can be improved.
以下、図面により本発明の詳細を具体的に説明
する。
Hereinafter, the details of the present invention will be specifically explained with reference to the drawings.
第１図は、本発明に係るスピーカの一実施例を
示す断面図、第２図はその音響抵抗器の詳細を示
す拡大断面図である。 FIG. 1 is a sectional view showing an embodiment of a speaker according to the present invention, and FIG. 2 is an enlarged sectional view showing details of an acoustic resistor thereof.
先ず、第１図に就いて説明する。 First, FIG. 1 will be explained.
第１図中、１はコーン・スピーカ、２はマグネ
ツト、３はポール・ピース、４はヨーク・プレー
ト、５はヨークであり、而してコーン・スピーカ
１はマグネツト２、ポール・ピース３、ヨーク・
プレート４、ヨーク５で磁気回路を構成してい
る。６は振動板、７は上記振動板６の外周を支持
するエツジ、８は上記振動板６の中心部を支持す
るダンパ、９は上記振動板６の下部に取り付けら
れたボイスコイル、１０はセンタ・キヤツプ、１
１はフレーム、１２は上記振動板６の後面に取り
付けた音響抵抗器である。 In Fig. 1, 1 is a cone speaker, 2 is a magnet, 3 is a pole piece, 4 is a yoke plate, and 5 is a yoke.・
The plate 4 and yoke 5 constitute a magnetic circuit. 6 is a diaphragm, 7 is an edge that supports the outer periphery of the diaphragm 6, 8 is a damper that supports the center of the diaphragm 6, 9 is a voice coil attached to the lower part of the diaphragm 6, and 10 is a center・Cap, 1
1 is a frame, and 12 is an acoustic resistor attached to the rear surface of the diaphragm 6.
而して、音響抵抗器１２は、振動板６に接触す
るように配置され、スピーカ本体のフレーム等を
利用して取付器具により固定される。 The acoustic resistor 12 is arranged so as to be in contact with the diaphragm 6, and is fixed by a mounting device using the frame of the speaker body or the like.
次に、本発明に係るスピーカに用いる音響抵抗
器１２に就いて詳しく説明する。 Next, the acoustic resistor 12 used in the speaker according to the present invention will be explained in detail.
第２図中、６は振動板、１２は音響抵抗器、１
３はホルダー、１４は環状の第１の軟質多孔体、
１５は円柱状の第２の軟質多孔体である。 In Figure 2, 6 is a diaphragm, 12 is an acoustic resistor, 1
3 is a holder, 14 is an annular first soft porous body,
15 is a cylindrical second soft porous body.
この音響抵抗器１２は、振動板６に略平行に下
部を平板とし、その中央部に透孔を設けて筒部を
突設させたホルダー１３が設けられ、振動板６と
ホルダー１３の間に環状の第１の軟質多孔体１４
が設けられ、ホルダー１３の筒部内に円柱状の第
２の軟質多孔体１５が挿入されて成るものであ
る。 This acoustic resistor 12 is provided with a holder 13 whose lower part is a flat plate approximately parallel to the diaphragm 6 , a through hole is provided in the center and a cylindrical portion protrudes from the holder 13 , and between the diaphragm 6 and the holder 13 . Annular first soft porous body 14
is provided, and a cylindrical second soft porous body 15 is inserted into the cylindrical portion of the holder 13.
第１及び第２の軟質多孔体１４は、気泡が連続
する軟質ポリウレタン等のスポンジやフエルト又
はグラスウール等の繊維物、その他の吸音材等が
使用される。 The first and second soft porous bodies 14 are made of a sponge such as soft polyurethane having continuous cells, a fibrous material such as felt or glass wool, or other sound absorbing material.
而して、本発明では、第２の軟質多孔体１５は
第１の軟質多孔体１４よりも密度が小さいものが
使用される。 Accordingly, in the present invention, the second soft porous body 15 has a lower density than the first soft porous body 14.
尚、本発明ではホルダー１３の筒部の孔径及び
突出高さについては制動効果が最も良い状態に決
められるようになつている。 In the present invention, the hole diameter and protrusion height of the cylindrical portion of the holder 13 are determined to provide the best braking effect.
音響抵抗器１２に於いては、振動板６が振動し
たときに、その振動による大部分の空気は第２の
軟質多孔体１５内を流れ、空気の粘性抵抗は第２
の軟質多孔体１５内で生じ、かつ第２の軟質多孔
体１５は振動板６の振動の影響を受けないので大
きな振幅時にも粘性抵抗値を一定に保つことにな
り、これにより音響歪みを発生することなく振動
板６の振動を制動し、周波数特性を向上させ得る
ものである。 In the acoustic resistor 12, when the diaphragm 6 vibrates, most of the air due to the vibration flows through the second soft porous body 15, and the viscous resistance of the air is
Since the second soft porous body 15 is not affected by the vibration of the diaphragm 6, the viscous resistance value is kept constant even when the vibration is large, and this causes acoustic distortion. This makes it possible to damp the vibration of the diaphragm 6 and improve the frequency characteristics without causing any damage.
尚、音響抵抗器１２は、振動板６面に中心軸に
対称に分散配設してもよい。又、第２図に示した
ものは第１及び第２の軟質多孔体をいずれも振動
板６の一つの等高線に沿つて連続する環状のもと
し、その半径方向断面が丁度第２図と同様になる
ように構成してもよい。 Note that the acoustic resistors 12 may be distributed on the surface of the diaphragm 6 symmetrically with respect to the central axis. In addition, in the case shown in FIG. 2, both the first and second soft porous bodies are annular bodies continuous along one contour line of the diaphragm 6, and the radial cross section thereof is exactly the same as that in FIG. It may be configured so that
本発明は叙上の如く構成されるので、本発明に
よるときには、スピーカの振動部の制動及び振動
板の分割振動を効果的に制動でき、周波数特性及
び過渡特性の改善されたスピーカを提供し得るも
のである。
Since the present invention is configured as described above, according to the present invention, it is possible to effectively damp the vibrating part of the speaker and the divided vibration of the diaphragm, and it is possible to provide a speaker with improved frequency characteristics and transient characteristics. It is something.
尚、本発明の構成は叙上の実施例に限定さるも
のではなく、例えば、軟質多孔体及びホルダーの
形状は本発明の目的の範囲内で自由に設計変更で
きるものであり、本発明はこれらの全てを包摂す
るものである。 Note that the configuration of the present invention is not limited to the above-mentioned embodiments; for example, the shapes of the soft porous body and the holder can be freely changed within the scope of the purpose of the present invention, and the present invention It encompasses all of the above.
第１図は、本発明に係るスピーカの一実施例を
示す断面図、第２図はその音響抵抗器の詳細を示
す拡大斜視図である。
１……スピーカ、６……振動板、１２……音響
抵抗器、１３……ホルダー、１４……第１の軟質
多孔体、１５……第２の軟質多孔体。
FIG. 1 is a sectional view showing an embodiment of a speaker according to the present invention, and FIG. 2 is an enlarged perspective view showing details of an acoustic resistor thereof. DESCRIPTION OF SYMBOLS 1... Speaker, 6... Vibration plate, 12... Acoustic resistor, 13... Holder, 14... First soft porous body, 15... Second soft porous body.
Claims (1)
このホルダーと振動板との間に軟質多孔体を設け
て成る音響抵抗器を具備するスピーカに於いて、 上記ホルダーに透孔を設け、ホルダーと振動板
との間には上記透孔を囲繞するよう環状に第１の
軟質多孔体を設けると共に、上記透孔を上記第１
の軟質多孔体より低密度の第２の軟質多孔体で閉
塞したことを特徴とする上記のスピーカ。[Claims] 1. A holder is fixedly provided substantially parallel to the diaphragm,
In this speaker equipped with an acoustic resistor formed by providing a soft porous material between the holder and the diaphragm, the holder is provided with a through hole, and the space between the holder and the diaphragm surrounds the through hole. A first soft porous body is provided in an annular shape, and the through hole is connected to the first soft porous body.
The above-mentioned speaker is closed with a second soft porous body having a lower density than the second soft porous body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29188587A JPS63153998A (en) | 1987-11-20 | 1987-11-20 | Speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29188587A JPS63153998A (en) | 1987-11-20 | 1987-11-20 | Speaker |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20342581A Division JPS58105695A (en) | 1981-12-18 | 1981-12-18 | Loudspeaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63153998A JPS63153998A (en) | 1988-06-27 |
| JPH0219680B2 true JPH0219680B2 (en) | 1990-05-02 |
Family
ID=17774706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29188587A Granted JPS63153998A (en) | 1987-11-20 | 1987-11-20 | Speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63153998A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109489798B (en) * | 2018-11-30 | 2021-11-02 | 维沃移动通信有限公司 | Method and device for detecting amplitude displacement of linear motor |
-
1987
- 1987-11-20 JP JP29188587A patent/JPS63153998A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63153998A (en) | 1988-06-27 |
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