JPH0537599Y2 - - Google Patents
Info
- Publication number
- JPH0537599Y2 JPH0537599Y2 JP1984129576U JP12957684U JPH0537599Y2 JP H0537599 Y2 JPH0537599 Y2 JP H0537599Y2 JP 1984129576 U JP1984129576 U JP 1984129576U JP 12957684 U JP12957684 U JP 12957684U JP H0537599 Y2 JPH0537599 Y2 JP H0537599Y2
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- voice coil
- dome
- vibration
- coil bobbin
- 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
- 239000000463 material Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 description 7
- 230000001052 transient effect Effects 0.000 description 4
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- 239000003190 viscoelastic substance Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000007779 soft material Substances 0.000 description 2
- 229910000737 Duralumin Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229940006076 viscoelastic substance Drugs 0.000 description 1
Landscapes
- Diaphragms For Electromechanical Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
この考案は電気音響機器の分野におけるドーム
型スピーカーの振動系の改良に関する。[Detailed description of the invention] [Field of industrial application] This invention relates to an improvement of the vibration system of a dome-shaped speaker in the field of electroacoustic equipment.
ドーム型スピーカーは一般的に第５図に示すご
とく、マグネツト５１、センターポール５２、フ
ロントプレート５３、およびバツクプレート５４
よりなる磁気回路のセンターポール５２とフロン
トプレート５３とで形成される磁気空隙に振動板
５５の外周に固着したボイスコイル５６が位置す
るごとくにエツジ５７により振動板を支持し、ボ
イスコイル５６に音声電流を通じて振動板５５を
駆動し音波を放射する。
A dome-shaped speaker generally includes a magnet 51, a center pole 52, a front plate 53, and a back plate 54, as shown in FIG.
The diaphragm is supported by edges 57 so that the voice coil 56 fixed to the outer periphery of the diaphragm 55 is positioned in the magnetic gap formed by the center pole 52 and front plate 53 of the magnetic circuit, and the voice coil 56 receives sound. The diaphragm 55 is driven through electric current to emit sound waves.
振動板５５は分割振動周波数を可及的に高くし
て周波数特性を良好にするためジユラルミンの如
き軽量で高剛性の材料を使用するのが通例であ
る。 The diaphragm 55 is usually made of a lightweight and highly rigid material such as duralumin in order to make the divided vibration frequency as high as possible and improve the frequency characteristics.
ドーム型スピーカーの他の構成として、振動板
に内部損失が極めて大きい軟質材料を使用した、
いわゆるソフトドーム型スピーカーが存在する。 Another configuration of the dome-shaped speaker is that the diaphragm is made of a soft material with extremely high internal loss.
There are so-called soft dome speakers.
上記した従来例において高剛性材料を使用した
振動板は材料としての機械的内部損失が少ないた
め、ピストン振動域より高域の周波数において、
振動板周辺から伝達された振動エネルギーと振動
板中央で反射した振動エネルギーとが干渉し、所
謂反共振により振動板外周附近に振動節を生じ
る。この振動節の外部と内部とでは振動板の振動
位相が相互に逆となるため当該反共振の周波数
（FR）において周波数特性上にデイツプを生じ
る。またその後の高域共振周波数（FH）ではピ
ークを生じて周波数特性や過渡特性が劣化し、聴
感を害していた。
In the conventional example described above, the diaphragm using a high-rigidity material has low mechanical internal loss as a material, so at frequencies higher than the piston vibration range,
The vibration energy transmitted from the periphery of the diaphragm and the vibration energy reflected at the center of the diaphragm interfere with each other, causing vibration nodes near the outer periphery of the diaphragm due to so-called anti-resonance. Since the vibration phases of the diaphragm are opposite to each other outside and inside this vibration node, a dip occurs in the frequency characteristics at the anti-resonance frequency ( FR ). Moreover, a peak occurs at the subsequent high resonance frequency (F H ), deteriorating the frequency characteristics and transient characteristics, and impairing the hearing sense.
また、後者のソフトドームスピーカーでは振動
板の内部損失が極めて大きいため共振や反共振は
生じにくいが、振動板質量が大きく、且つ振動エ
ネルギーが伝達しにくいのでスピーカーとしての
変換能率が極めて低い欠点があつた。 In addition, in the latter type of soft dome speaker, the internal loss of the diaphragm is extremely large, so resonance and anti-resonance are unlikely to occur, but the diaphragm has a large mass and it is difficult to transmit vibration energy, so the conversion efficiency as a speaker is extremely low. It was hot.
本考案は上記した従来例の欠点を除き、反共振
が生じにくいように改良した振動系を使用して、
周波数特性や能率を良好にしたドーム型スピーカ
ーを得ることを目的とする。
The present invention eliminates the drawbacks of the conventional example described above and uses an improved vibration system to prevent anti-resonance from occurring.
The purpose is to obtain a dome-shaped speaker with good frequency characteristics and efficiency.
上記の目的を達成するために、本考案に係るド
ーム型スピーカーは、ドーム形の振動板１、当該
振動板１に結合されたボイスコイルボビン２、お
よび当該ボイスコイルボビン２に巻回されたボイ
スコイル３、前記振動板１の外周部に固着された
エツジ４とからなる振動系を有するドーム型スピ
ーカーにおいて、前記振動板１が硬質の材料から
なり、幅が振動板１の全周囲長の３〜50％で且つ
半径方向の幅が振動板１の半径の50％以内の大き
さの切欠部５が１箇所以上、振動板１の周辺部近
傍の１次共振モードの節円を含むような位置に形
成されると共に、当該振動板１より小径で且つ下
端部にボイスコイル３を巻回したボイスコイルボ
ビン２を振動板１の球面部に接着して、振動板１
の内周部を駆動するようにした構成の振動系を有
することを特徴とする。 In order to achieve the above object, the dome-shaped speaker according to the present invention includes a dome-shaped diaphragm 1, a voice coil bobbin 2 coupled to the diaphragm 1, and a voice coil 3 wound around the voice coil bobbin 2. , in a dome-shaped speaker having a vibration system consisting of an edge 4 fixed to the outer circumference of the diaphragm 1, the diaphragm 1 is made of a hard material and has a width of 3 to 50 mm of the total circumference of the diaphragm 1. % and whose radial width is within 50% of the radius of the diaphragm 1, at least one notch 5 is located at a position that includes the nodal circle of the primary resonance mode near the periphery of the diaphragm 1. At the same time, a voice coil bobbin 2 having a diameter smaller than that of the diaphragm 1 and having a voice coil 3 wound around its lower end is adhered to the spherical part of the diaphragm 1 to form the diaphragm 1.
It is characterized by having a vibration system configured to drive the inner circumferential portion of the device.
上記構成を有する振動系においては、振動板の
外周辺における剛性が周方向に沿つて場所的に異
なるので、前記従来例の如きFRやFHにおける著
しい反共振や共振は分散され、それらに起因して
生じる周波数特性上のデイツプやピークは消失し
て平坦な周波数特性となり、同時に著しい共振が
消失することにより過渡特性も良好となるので、
再生音質は著しく改善されることとなる。
In the vibration system having the above configuration, the stiffness at the outer periphery of the diaphragm differs along the circumferential direction, so significant anti-resonance and resonance in F R and F H as in the conventional example are dispersed and The resulting dips and peaks in the frequency characteristics disappear, resulting in flat frequency characteristics, and at the same time, significant resonance disappears, resulting in good transient characteristics.
The playback quality will be significantly improved.
更に前記振動板を内周部で駆動するためにボイ
スコイルが小直径となり、磁気回路のマグネツト
を小形にしても磁束を集中させることにより能率
の低下を防止する作用を有する。 Furthermore, since the diaphragm is driven by the inner periphery, the voice coil has a small diameter, and even if the magnet of the magnetic circuit is made small, it has the effect of preventing a drop in efficiency by concentrating the magnetic flux.
第１図〜第４図により本考案の実施例を詳述す
る。第１図は本考案に係はるドーム型スピーカー
の振動系の基本形態で、振動板１は金属、合成樹
脂、高剛性充填材（繊維状、鱗片状、粉末状等）
で強化した合成樹脂、等の軽量高剛性の硬質材料
からなり、その外周辺に１箇所以上（図において
は２箇所）切欠部５が設けられている。また、当
該振動板１の外周に、エツジ４が接着される。
Embodiments of the present invention will be described in detail with reference to FIGS. 1 to 4. Figure 1 shows the basic form of the vibration system of the dome-shaped speaker according to the present invention, in which the diaphragm 1 is made of metal, synthetic resin, or high-rigidity filler (fiber-like, scale-like, powder-like, etc.).
It is made of a lightweight, highly rigid hard material such as synthetic resin reinforced with carbon dioxide, and is provided with one or more cutouts 5 (two in the figure) around its outer periphery. Furthermore, an edge 4 is bonded to the outer periphery of the diaphragm 1.
前記切欠部５は振動板周辺に生じる著しい振動
節を分散させるためその剛性を不均一とすること
が目的であるから、その大きさは、実験結果によ
ると、幅Ａは振動板１の全周長の３〜33％、径方
向深さｄは半径の１〜50％、もしくは高さ方向の
深さＨは振動板全高の10〜80％、程度が適当であ
る。 The purpose of the notch 5 is to make the rigidity non-uniform in order to disperse the significant vibration nodes that occur around the diaphragm. It is appropriate that the radial depth d be 3 to 33% of the length, the radial depth d be 1 to 50% of the radius, or the height H be 10 to 80% of the total height of the diaphragm.
またその形状は限定されず、切欠端部形状が円
弧であつても直線であつても同様な効果が得られ
る。 Further, the shape is not limited, and the same effect can be obtained whether the cutout end shape is an arc or a straight line.
更に第２図の如く当該切欠部５の端部に補強リ
ブ８を設けることは切欠端部が自由端として異常
振動をするのを防止する効果を有する。 Furthermore, providing a reinforcing rib 8 at the end of the notch 5 as shown in FIG. 2 has the effect of preventing the notch end from abnormally vibrating as a free end.
このような補強リブ８は金属振動板の場合はプ
レス成形時に折曲げにより１体成形するのが適当
であり、合成樹脂等の場合は当該切欠端部が肉厚
となるごとくに成形することにより容易に成形す
ることができる。 In the case of a metal diaphragm, it is appropriate to form such a reinforcing rib 8 in one piece by bending it during press molding, and in the case of a synthetic resin, etc., it is appropriate to form it so that the notch end becomes thick. Can be easily molded.
上記各実施例において、第３図に示す様に前記
切欠部５を粘弾性物質７によつて閉塞してもよ
い。切欠部５を閉塞することで振動板背面の空気
の漏洩を防止し、且つ機械的内部ロスにより過渡
特性を尚一層良好にする効果を有する。これらの
粘弾性物質は別部材であつても、或は第４図のご
とく軟質材料（例えば粘弾性材料を含浸もしくは
塗布した布等）を用いてエツジと一体成形したも
のでもよい。 In each of the above embodiments, the notch 5 may be closed with a viscoelastic material 7 as shown in FIG. Closing the notch 5 has the effect of preventing air leakage on the back surface of the diaphragm and further improving transient characteristics due to mechanical internal loss. These viscoelastic substances may be separate members, or they may be integrally molded with the edge using a soft material (for example, cloth impregnated or coated with a viscoelastic material) as shown in FIG.
尚第４図に示した実施例では振動系支持にダン
パ９を使用している。エツジ４とダンパ９の併用
により振動系の動作安定度は格段に良好となる。 In the embodiment shown in FIG. 4, a damper 9 is used to support the vibration system. By using the edge 4 and the damper 9 in combination, the operational stability of the vibration system is significantly improved.
また、簡単な構成の実施例として、前記振動板
１とエツジ部４とを同一材料で一体に成形して得
た振動系（図面省略）も本考案の技術範囲に属す
る。本構成によつて、製造価格を下げることが可
能である。 Further, as an example of a simple configuration, a vibration system (not shown) obtained by integrally molding the diaphragm 1 and the edge portion 4 from the same material also belongs to the technical scope of the present invention. With this configuration, manufacturing costs can be reduced.
次いで、ボイスコイル３が捲回されたボイスコ
イルボジン２が振動板１の内周部に接着される。 Next, the voice coil body 2 with the voice coil 3 wound thereon is adhered to the inner peripheral portion of the diaphragm 1.
第１図〜第４図に示した実施例では、ボイスコ
イルボビン２は振動板１の凸面側に接着されてい
るが、凹面側に接着された場合でも前記した作用
効果を有する。前者はボイスコイルボビンが短寸
法となるため振動系が軽量となり、能率上昇に寄
与するのに対し、後者では音響放射面が凸面とな
り、指向性がブロードとなる特徴を有する（図面
省略）。 In the embodiment shown in FIGS. 1 to 4, the voice coil bobbin 2 is bonded to the convex side of the diaphragm 1, but even if it is bonded to the concave side, the above-mentioned effects can be obtained. The former has a short voice coil bobbin, which makes the vibration system lightweight and contributes to increased efficiency, whereas the latter has a convex acoustic radiation surface and broad directivity (not shown).
第６図に本考案によるドーム型スピーカーと従
来例との周波数特性を比較して示す。
FIG. 6 shows a comparison of the frequency characteristics of the dome-shaped speaker according to the present invention and a conventional example.
実線は本考案のドーム型スピーカで、点線は従
来例である。 The solid line is the dome-shaped speaker of the present invention, and the dotted line is the conventional example.
従来例スピーカーの特性にはほぼ15KHzに反共
振によるデイツプと、20KHz付近に高域共振によ
るピークが見られるのに対し、本考案ドーム型ス
ピーカーにおいては上記周波数帯域において著し
いピークやデイツプが消失していることから、本
考案による振動系の構造が著しい共振や反共振を
分散消失させるのに有効であることを示してい
る。 In the characteristics of conventional speakers, there is a dip due to anti-resonance around 15KHz and a peak due to high-frequency resonance around 20KHz, whereas in the dome-shaped speaker of the present invention, significant peaks and dips disappear in the above frequency band. This shows that the structure of the vibration system according to the present invention is effective in dispersing and eliminating significant resonance and anti-resonance.
また振動板主体が硬質材料でありソフトドーム
振動板と比較して軽量であるため、能率が低下す
ることもなく、従来例に見られない優れた周波数
特性と過渡特性を有するドーム型スピーカーを得
ることができるものである。 In addition, since the diaphragm is mainly made of hard material and is lighter than a soft dome diaphragm, there is no drop in efficiency, resulting in a dome-shaped speaker with excellent frequency characteristics and transient characteristics not seen in conventional speakers. It is something that can be done.
第１図は本考案ドーム型スピーカーの振動系の
一部切欠き斜視図、第２図、第３図、第４図はそ
れぞれ他の実施例を示す断面図、第５図は従来一
般のドームスピーカーの断面図、第６図は周波数
特性図である。
１は振動板、２はボイスコイルボビン、３はボ
イスコイル、４はエツジ、５は切欠部、６は粘弾
性体、７は延長部である。
Fig. 1 is a partially cutaway perspective view of the vibration system of the dome-shaped speaker of the present invention, Figs. 2, 3, and 4 are sectional views showing other embodiments, and Fig. 5 is a conventional general dome. A cross-sectional view of the speaker, and FIG. 6 is a frequency characteristic diagram. 1 is a diaphragm, 2 is a voice coil bobbin, 3 is a voice coil, 4 is an edge, 5 is a notch, 6 is a viscoelastic body, and 7 is an extension.
Claims (1)
たボイスコイルボビン２、および当該ボイスコイ
ルボビン２に巻回されたボイスコイル３、前記振
動板１の外周部に固着されたエツジ４とからなる
振動系を有するドーム型スピーカーにおいて、前
記振動板１が硬質の材料からなり、幅が振動板１
の全周囲長の３〜33％で且つ半径方向の幅が振動
板１の半径の50％以内の大きさの切欠部５が１箇
所以上、振動板１の周辺部近傍の１次共振モード
の節円を含む位置に形成されると共に、当該振動
板１より小径で且つ下端部にボイスコイル３を巻
回したボイスコイルボビン２を振動板１の球面部
に接着して、振動板１の内周部を駆動するように
した構成の振動系を有することを特徴とするドー
ム型スピーカー。 Vibration consisting of a dome-shaped diaphragm 1, a voice coil bobbin 2 coupled to the diaphragm 1, a voice coil 3 wound around the voice coil bobbin 2, and an edge 4 fixed to the outer periphery of the diaphragm 1. In a dome-shaped speaker having a system, the diaphragm 1 is made of a hard material, and the width is the same as that of the diaphragm 1.
There is at least one notch 5 having a size of 3 to 33% of the total circumference of the diaphragm 1 and a radial width within 50% of the radius of the diaphragm 1, and the primary resonance mode near the periphery of the diaphragm 1 is A voice coil bobbin 2 is formed at a position including the nodal circle, has a diameter smaller than that of the diaphragm 1, and has a voice coil 3 wound around the lower end thereof, and is bonded to the spherical part of the diaphragm 1. A dome-shaped speaker characterized by having a vibration system configured to drive a part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12957684U JPS6144997U (en) | 1984-08-27 | 1984-08-27 | dome type speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12957684U JPS6144997U (en) | 1984-08-27 | 1984-08-27 | dome type speaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6144997U JPS6144997U (en) | 1986-03-25 |
| JPH0537599Y2 true JPH0537599Y2 (en) | 1993-09-22 |
Family
ID=30688194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12957684U Granted JPS6144997U (en) | 1984-08-27 | 1984-08-27 | dome type speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6144997U (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63170256U (en) * | 1987-04-27 | 1988-11-07 | ||
| JPS63170255U (en) * | 1987-04-27 | 1988-11-07 | ||
| JPH0162071U (en) * | 1987-10-16 | 1989-04-20 | ||
| JPH031398Y2 (en) * | 1987-11-12 | 1991-01-17 | ||
| JPH0662984B2 (en) * | 1987-11-25 | 1994-08-17 | 出光興産株式会社 | Traction oil composition |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5351702U (en) * | 1976-10-06 | 1978-05-02 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55155183U (en) * | 1979-04-20 | 1980-11-08 |
-
1984
- 1984-08-27 JP JP12957684U patent/JPS6144997U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5351702U (en) * | 1976-10-06 | 1978-05-02 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6144997U (en) | 1986-03-25 |
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