JPH033998B2 - - Google Patents
Info
- Publication number
- JPH033998B2 JPH033998B2 JP56095834A JP9583481A JPH033998B2 JP H033998 B2 JPH033998 B2 JP H033998B2 JP 56095834 A JP56095834 A JP 56095834A JP 9583481 A JP9583481 A JP 9583481A JP H033998 B2 JPH033998 B2 JP H033998B2
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- edge
- resonant frequency
- frequency
- resonance
- 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
- 239000002131 composite material Substances 0.000 claims description 19
- 230000005520 electrodynamics Effects 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 238000003856 thermoforming Methods 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
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/16—Mounting or tensioning of diaphragms or cones
- H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
- H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
- H04R2307/207—Shape aspects of the outer suspension of loudspeaker diaphragms
Description
【発明の詳細な説明】
本発明は動電型スピーカに関するものであり、
その目的とするところはエツジ自体の固有の逆共
振周波数を振動板自体の固有の音圧共振峰の生ず
る周波数に一致させることにより、音圧ピークレ
ベルを小さくして、再生音質の向上を図ることの
できる動電型スピーカを提供することにある。[Detailed Description of the Invention] The present invention relates to an electrodynamic speaker,
The purpose of this is to reduce the sound pressure peak level and improve the reproduced sound quality by matching the inherent anti-resonance frequency of the edge itself to the frequency at which the sound pressure resonance peak unique to the diaphragm occurs. The purpose of the present invention is to provide an electrodynamic speaker that can perform the following functions.
一般に電動型スピーカは振動板をエツジでフレ
ームに支持し、その振動板を磁気回路を構成する
磁気ギヤツプ内に配置したボイスコイルでピスト
ン運動させるように構成している。このような動
電型スピーカにおいて、再生周波数の高域限界は
振動板自体の固有の音圧共振峰により決定される
ものであり、この音圧共振峰は振動板自体が固有
に持つ共振モードにより発生し、振動板材料、構
造等によりそのピークレベル、周波数が決定され
る。一方、振動板を支持するエツジは振動板の振
動とは逆位相で振動するエツジ自体の固有の逆共
振周波数を有している。このようなことから、エ
ツジとして逆共振周波数が振動板の共振周波数よ
り低いものを使用すると、スピーカ自体の再生周
波数特性上にデイツプとして表われ、再生帯域を
狭めてしまうという欠点があり、エツジとしては
逆共振周波数が振動板の共振周波数より高いもの
を使用することが望まれる。従来、平エツジ、ロ
ールエツジと呼ばれるエツジは、それ自体の逆共
振周波数が振動板の共振周波数よりも低い周波数
に現われるものであり、この逆共振周波数をその
エツジ自体で高めることは難しい。一方、菱形状
の突起を円周方向に並設したエツジは、見かけ上
の厚み増加のために逆共振周波数が振動板の共振
周波数より高く、スピーカの再生周波数の高域限
界を狭ばめることが少ない。しかしながら、上述
のような振動板の共振周波数に比して高い逆共振
周波数をもつエツジによつて振動板を支持した場
合においては、振動板自体の固有の音圧共振峰は
依然して残つており、スピーカの音圧再生周波数
特性を高域まで平担化することはむずかしい問題
があつた。 In general, an electric speaker has a diaphragm supported by a frame at the edges, and the diaphragm is moved by a piston by a voice coil disposed within a magnetic gap that constitutes a magnetic circuit. In such electrodynamic speakers, the high frequency limit of the reproduction frequency is determined by the sound pressure resonance peak inherent to the diaphragm itself, and this sound pressure resonance peak is determined by the resonance mode inherent to the diaphragm itself. The peak level and frequency are determined by the diaphragm material, structure, etc. On the other hand, the edge supporting the diaphragm has its own unique anti-resonant frequency that vibrates in an opposite phase to the vibration of the diaphragm. For this reason, if you use an edge with a reverse resonance frequency lower than the resonance frequency of the diaphragm, it will appear as a dip in the reproduction frequency characteristics of the speaker itself, narrowing the reproduction band. It is desirable to use one whose anti-resonant frequency is higher than the resonant frequency of the diaphragm. Conventionally, an edge called a flat edge or a rolled edge has its own anti-resonant frequency that appears at a lower frequency than the resonant frequency of the diaphragm, and it is difficult to increase this anti-resonant frequency by the edge itself. On the other hand, in the case of an edge in which diamond-shaped protrusions are arranged in parallel in the circumferential direction, the reverse resonance frequency is higher than the resonance frequency of the diaphragm due to the apparent increase in thickness, narrowing the high range limit of the speaker's reproduction frequency. There aren't many things. However, when the diaphragm is supported by an edge with a higher anti-resonant frequency than the resonant frequency of the diaphragm as described above, the sound pressure resonance peak inherent to the diaphragm itself still remains. Therefore, it was difficult to flatten the sound pressure reproduction frequency characteristics of the speaker to high frequencies.
本発明はこのような従来の欠点を解消するもの
であり、振動板の共振周波数より高い逆共振周波
数を有するエツジ部と振動板の共振周波数より低
い逆共振周波数を有するエツジ部を備える複合エ
ツジによつて振動板を支持したことを特長とする
ものである。このように複合エツジを構成する
と、振動板の共振周波数より高い逆共振周波数を
有するエツジ部の逆共振周波数を、振動板の共振
周波数より低い逆共振周波数を有するエツジ部で
振動板の共振周波数まで低くすることができ、複
合エツジ自体の逆共振周波数を振動板の共振周波
数に一致させることができる。そのために振動板
自体の個有の音圧共振峰によるピークレベルを小
さくすることができ、スピーカの再生音圧周波数
特性を高域まで平担化して再生音質をよくするこ
とができる利点を有する。しかも、複合エツジで
あるためにそれ自体の逆共振周波数を任意に選ぶ
ことができ、振動板に適合させやすくスピーカ設
計をしやすくすることができる利点を有する。 The present invention solves these conventional drawbacks, and provides a composite edge comprising an edge portion having an anti-resonant frequency higher than the resonant frequency of the diaphragm and an edge portion having an anti-resonant frequency lower than the resonant frequency of the diaphragm. This is characterized by supporting the diaphragm. By configuring the composite edge in this way, the anti-resonant frequency of the edge portion having an anti-resonant frequency higher than the resonant frequency of the diaphragm can be increased to the resonant frequency of the diaphragm at the edge portion having an anti-resonant frequency lower than the resonant frequency of the diaphragm. The anti-resonant frequency of the composite edge itself can be made to match the resonant frequency of the diaphragm. Therefore, the peak level caused by the unique sound pressure resonance peak of the diaphragm itself can be reduced, and the reproduced sound pressure frequency characteristics of the speaker can be leveled out to high frequencies, which has the advantage of improving the reproduced sound quality. Moreover, since it is a composite edge, its own anti-resonant frequency can be arbitrarily selected, which has the advantage of being easy to adapt to a diaphragm and facilitating speaker design.
以下、本発明について実施例の図面と共に説明
する。 The present invention will be described below with reference to drawings of embodiments.
第１図および第２図は本発明の一実施例を示し
ており、図中、１は複合エツジ、２はアルミハニ
カム平面振動板で、上記複合エツジ１によつてフ
レーム５に支持されている。３はボイスコイルボ
ビンであり、上記振動板２の第１次共振モードの
節円位置に接合されており、ボイスコイル４が巻
回されている。８はセンターボール８ａを有する
ヨークであり、このヨーク８の上にリング状のマ
グネツト７が設けられ、このリング状マグネツト
７の上にリング状のプレート６が設けられてい
る。これらヨーク８、マグネツト７、プレート６
は磁気回路を構成しており、上記センターポール
８ａと上記プレート６との間に磁気ギヤツプを有
している。この磁気回路を構成する磁気ギヤツプ
内にはボイスコイル４が設けられており、上記振
動板２をピストン運動するようになつている。上
記複合エツジ１は菱形状の突起を円周方向に連続
的に並設したエツジ部１０と、このエツジ部１０
の内周円側および外周円側に設けた断面円弧状の
エツジ部９，９′で構成されており、上記エツジ
部１０は見かけ上の厚み増加のために剛性が高
く、上記エツジ部９，９′は構造的に剛性が低く
形成されている。すなわち、上記複合エツジ１は
そのエツジ部１０が振動板１の第２次共振モード
（周波数）より高い逆共振周波数を有し、エツジ
部９，９′が振動板１の第２次共振モード（周波
数）より低い逆共振周波数を有している。 1 and 2 show an embodiment of the present invention, in which 1 is a composite edge and 2 is an aluminum honeycomb plane diaphragm, which is supported by the frame 5 by the composite edge 1. . A voice coil bobbin 3 is connected to the nodal position of the first resonance mode of the diaphragm 2, and the voice coil 4 is wound around the voice coil bobbin. A yoke 8 has a center ball 8a, a ring-shaped magnet 7 is provided on the yoke 8, and a ring-shaped plate 6 is provided on the ring-shaped magnet 7. These yoke 8, magnet 7, plate 6
constitutes a magnetic circuit, and has a magnetic gap between the center pole 8a and the plate 6. A voice coil 4 is provided within a magnetic gap constituting this magnetic circuit, and is adapted to cause the diaphragm 2 to perform piston motion. The composite edge 1 includes an edge portion 10 in which diamond-shaped protrusions are continuously arranged side by side in the circumferential direction;
It is composed of edge parts 9, 9' having an arcuate cross section provided on the inner circumference side and the outer circumference side, and the edge part 10 has high rigidity due to an apparent increase in thickness. 9' is formed to have low structural rigidity. That is, in the composite edge 1, the edge portion 10 has an inverse resonance frequency higher than the second resonance mode (frequency) of the diaphragm 1, and the edge portions 9, 9' have a second resonance mode (frequency) of the diaphragm 1. frequency) has a lower anti-resonant frequency.
このように構成すると、複合エツジ１はエツジ
部１０の剛性をエツジ部９，９′でやわらげられ
るために支持力が低下し、それ自体の逆共振周波
数を低くして振動板１の共振周波数に一致させる
ことができる。この複合エツジ１は、エツジ部
９，９′が構造的に非常に狭い範囲にあるが、剛
性は低く、等価回路的にコンダクタンスＣとして
作用し、一方、エツジ部１０が構造的に非常に広
い範囲にあるが突起の厚み作用により剛性が高
く、コンダクタンスは存在せず質量として等価回
路的にインダクタンスＬとして作用する。第３図
は複合エツジ１の等価回路を示しており、図中、
C1はエツジ部９に相当するコンダクタンス、C2
はエツジ部９′に相当するコンダクタンス、Ｌは
エツジ部１０に相当するインダクタンスである。
ここで、従来のスピーカに使用するエツジではコ
ンダクタンスＣが非常に小さくC1，Ｌ，C2のル
ープで発生する共振（エツジの逆共振）は高い周
波数であつたが、複合エツジ１ではコンダクタン
スC1，C2共に大きい値となるためにエツジ逆共
振は低くなる。コンダクタンスC1，C2は円弧、
形状の大きさ、深さという構造要素により調整可
能であるために音圧共振峰の発生する周波数にエ
ツジ逆共振周波数を一致させる事が出来、音圧共
振峰を低下させる事が出来る。第４図はハニカム
コアをサンドイツチ構造とした平板振動板に、高
分子フイルムを熱成形したロール状のエツジを用
いた従来スピーカＡと本例による複合エツジを接
合したスピーカＢの比較周波数特性である。ロー
ルエツジの逆共振によるデイツプは顕著には表わ
れていないが、両者を比較すると30KHz付近にあ
らわれる振動板共振による音圧ピークの抑止効果
は大であることがわかる。このように本例の複合
エツジを用いるとスピーカの高域再生限界周波数
を決定していた音圧共振峰を制御でき、平坦な音
圧周波数特性を得ることができる。 With this configuration, the composite edge 1 reduces the supporting force because the rigidity of the edge portion 10 is softened by the edge portions 9 and 9', and lowers its own anti-resonant frequency to match the resonant frequency of the diaphragm 1. Can be matched. In this composite edge 1, the edge portions 9 and 9' are structurally very narrow, but have low rigidity and act as conductance C in terms of an equivalent circuit, while the edge portion 10 is structurally very wide. However, the rigidity is high due to the thickness of the protrusion, and there is no conductance, and the mass acts as an inductance L in an equivalent circuit. Figure 3 shows the equivalent circuit of composite edge 1, and in the figure,
C 1 is the conductance corresponding to edge part 9, C 2
is the conductance corresponding to the edge portion 9', and L is the inductance corresponding to the edge portion 10.
Here, in the edge used in conventional speakers, the conductance C is very small, and the resonance (reverse resonance of the edge) generated in the loop of C 1 , L, and C 2 is at a high frequency, but in the composite edge 1, the conductance C Since both 1 and C2 have large values, the edge reverse resonance becomes low. Conductance C 1 and C 2 are circular arcs,
Since it can be adjusted by structural elements such as the size and depth of the shape, the edge inverse resonance frequency can be made to match the frequency at which the sound pressure resonance peak occurs, and the sound pressure resonance peak can be lowered. Figure 4 shows the comparative frequency characteristics of a conventional speaker A, which uses a roll-shaped edge made by thermoforming a polymer film on a flat plate diaphragm with a honeycomb core having a sandwich structure, and a speaker B, which has a composite edge according to this example bonded to it. . Although the dip due to the reverse resonance of the roll edge is not noticeable, comparing the two shows that the effect of suppressing the sound pressure peak due to the diaphragm resonance that appears around 30KHz is significant. As described above, by using the composite edge of this example, the sound pressure resonance peak that determines the high frequency reproduction limit frequency of the speaker can be controlled, and a flat sound pressure frequency characteristic can be obtained.
尚、上記の実施例では菱形状の突起を有するエ
ツジ部１０の両側に円弧状のエツジ部９，９′を
設けたが、これは第５図のようにエツジ部１０の
いずれか一方の周側面に設けてあればよい。又、
エツジ部１０の少なくとも一方の周側面に設ける
エツジ部９は円弧状以上にも第６図に示すように
くさび形状のものであつてもよい。又、振動板は
平面振動板に限られるものでなく、他のコーン形
状、ドーム形状等の種々の形状のものに同様に実
施し得ることは云うまでもない。 Incidentally, in the above embodiment, arcuate edge portions 9 and 9' were provided on both sides of the edge portion 10 having a rhombus-shaped protrusion, but as shown in FIG. It should be provided on the side. or,
The edge portion 9 provided on at least one peripheral side of the edge portion 10 may have a wedge shape as shown in FIG. 6 rather than an arc shape. Furthermore, it goes without saying that the diaphragm is not limited to a flat diaphragm, and can be similarly implemented in various shapes such as a cone shape or a dome shape.
以上のように本発明によれば、振動板の共振周
波数より高い逆共振周波数を有する円周方向に連
続なエツジ部と振動板の共振周波数より低い逆共
振周波数を有するエツジ部とを備える複合エツジ
によつて振動板を支持するように構成し、複合エ
ツジ自体の逆共振周波数を振動板の共振周波数に
一致させるようにしたので、振動板自体の固有の
音圧共振峰によるピークレベルを小さくすること
ができ、スピーカの再生音圧周波数特性を高域ま
で平坦化して再生音質をよくすることができる利
点を有するものである。 As described above, according to the present invention, a composite edge portion having a circumferentially continuous edge portion having an anti-resonant frequency higher than the resonant frequency of the diaphragm and an edge portion having an anti-resonant frequency lower than the resonant frequency of the diaphragm is provided. The diaphragm is supported by the diaphragm, and the inverse resonance frequency of the composite edge itself is made to match the resonance frequency of the diaphragm, thereby reducing the peak level due to the unique sound pressure resonance peak of the diaphragm itself. This has the advantage that the reproduced sound pressure frequency characteristics of the speaker can be flattened to high frequencies and the reproduced sound quality can be improved.
第１図は本発明の動電型スピーカの一実施例を
示す要部平面図、第２図は同スピーカの要部の断
面図、第３図は同スピーカに用いた複合エツジの
等価回路図、第４図は同スピーカと従来のスピー
カの再生音圧周波数の比較特性図、第５図、第６
図は本発明の動電型スピーカの他の実施例を示す
要部断面図である。
１……複合エツジ、２……振動板、９，９′，
１０……エツジ部。
Fig. 1 is a plan view of essential parts showing an embodiment of the electrodynamic speaker of the present invention, Fig. 2 is a sectional view of the essential parts of the same speaker, and Fig. 3 is an equivalent circuit diagram of the composite edge used in the speaker. , Fig. 4 is a comparison characteristic diagram of the reproduction sound pressure frequency of the same speaker and a conventional speaker, Fig. 5, Fig. 6
The figure is a sectional view of a main part showing another embodiment of the electrodynamic speaker of the present invention. 1... Composite edge, 2... Vibration plate, 9,9',
10...Edge part.
Claims (1)
有する円周方向に連続なエツジ部と上記振動板の
共振周波数より低い逆共振周波数を有するエツジ
部とを備え、エツジ自体の固有の逆共振周波数を
前記振動板自体の固有の音圧共振峰の生ずる周波
数に一致させた複合エツジによつて前記振動板を
フレームに支持したことを特徴とする動電型スピ
ーカ。1 Equipped with a circumferentially continuous edge portion having an anti-resonant frequency higher than the resonant frequency of the diaphragm and an edge portion having an anti-resonant frequency lower than the resonant frequency of the diaphragm, and having a unique anti-resonant frequency of the edge itself. An electrodynamic speaker characterized in that the diaphragm is supported on a frame by a composite edge matched to a frequency at which a unique sound pressure resonance peak of the diaphragm itself occurs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9583481A JPS57210799A (en) | 1981-06-19 | 1981-06-19 | Dynamic type speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9583481A JPS57210799A (en) | 1981-06-19 | 1981-06-19 | Dynamic type speaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57210799A JPS57210799A (en) | 1982-12-24 |
| JPH033998B2 true JPH033998B2 (en) | 1991-01-21 |
Family
ID=14148409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9583481A Granted JPS57210799A (en) | 1981-06-19 | 1981-06-19 | Dynamic type speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57210799A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5753031Y2 (en) * | 1978-03-08 | 1982-11-17 |
-
1981
- 1981-06-19 JP JP9583481A patent/JPS57210799A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57210799A (en) | 1982-12-24 |
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