JPH0340000Y2 - - Google Patents
Info
- Publication number
- JPH0340000Y2 JPH0340000Y2 JP9186684U JP9186684U JPH0340000Y2 JP H0340000 Y2 JPH0340000 Y2 JP H0340000Y2 JP 9186684 U JP9186684 U JP 9186684U JP 9186684 U JP9186684 U JP 9186684U JP H0340000 Y2 JPH0340000 Y2 JP H0340000Y2
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- voice coil
- coil bobbin
- dome
- shaped 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
- 239000003190 viscoelastic substance Substances 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 239000004744 fabric Substances 0.000 description 3
- 230000001052 transient effect Effects 0.000 description 3
- 239000000945 filler Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000546 pharmaceutical excipient Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 229910000737 Duralumin Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013016 damping 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
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229940006076 viscoelastic substance Drugs 0.000 description 1
Landscapes
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Diaphragms For Electromechanical Transducers (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３図に示すご
とく、マグネツト３１、センターポール３２、フ
ロントプレート３３、およびバツクプレート３４
よりなる磁気回路のセンターポール３２とフロン
トプレート３３とで形成される磁気空〓に振動板
３５の外周に固着したボイスコイル３６が位置す
るごとくエツジ３７により振動板を支持し、ボイ
スコイル３６に音声電流を通じて振動板３５を駆
動し音波を放射する。
A dome-shaped speaker generally has a magnet 31, a center pole 32, a front plate 33, and a back plate 34, as shown in FIG.
The voice coil 36 fixed to the outer periphery of the diaphragm 35 is supported by the edge 37 so that the voice coil 36 fixed to the outer periphery of the diaphragm 35 is positioned in the magnetic air formed by the center pole 32 and the front plate 33 of the magnetic circuit. The diaphragm 35 is driven through an electric current to emit sound waves.
振動板３５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 35 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、ま
たその後の高域共周波数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 phase of the diaphragm outside and inside this vibration node is opposite to each other, the frequency of the anti-resonance is
A dip occurred in the frequency characteristics at FR , and a peak occurred at the subsequent high-frequency co-frequency FH , deteriorating the frequency characteristics and transient characteristics and impairing hearing.
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.
上記した目的を達成するための本考案に係るド
ーム型スピーカーの構成を、実施例を示す第１図
ａ，ｂ及び第２図を用いて説明すると、本考案
は、振動板１、当該振動板１に駆動力を伝達する
ボイスコイルボビン２、当該ボイスコイルボビン
２に捲回されたボイスコイル３、および前記ボイ
スコイルボビン２の上端近傍に接着されたエツジ
４からなる振動系を有するドーム型スピーカーに
おいて、前記ボイスコイルボビン２上端部に振動
板１と同曲率の延長部２１を形成し、当該延長部
２１に１箇所以上切欠部２２を設け、ボイスコイ
ルボビン２より小直径の振動板１を前記延長部２
１に貼着し、前記切欠部２２においてボイスコイ
ルボビン２上端部と振動板１外周との間に〓間５
を形成させた構成の振動系を有するドーム型スピ
ーカーであり、また、上記振動系に於ける〓間５
が粘弾性物質６で閉鎖されているドーム型スピー
カーである。
The structure of the dome-shaped speaker according to the present invention for achieving the above object will be explained using FIGS. 1a and 1b and FIG. 2 showing embodiments. 1, a voice coil 3 wound around the voice coil bobbin 2, and an edge 4 bonded near the upper end of the voice coil bobbin 2. An extension part 21 having the same curvature as the diaphragm 1 is formed at the upper end of the voice coil bobbin 2, and one or more notches 22 are provided in the extension part 21, so that the diaphragm 1 having a smaller diameter than the voice coil bobbin 2 can be connected to the extension part 2.
1, and a gap 5 is formed between the upper end of the voice coil bobbin 2 and the outer periphery of the diaphragm 1 in the notch 22.
It is a dome-shaped speaker having a vibration system configured to form a
is a dome-shaped speaker that is closed with a viscoelastic material 6.
上記構成の振動系では、振動板１は外周部がボ
イスコイルボビン２の上端部の、弧状をなして断
続した延長部２１に接着されているので、振動板
外周近傍の周方向にそつた剛性は不均一となり、
その上ボイスコイルボビン２からの駆動力が振動
板に対して場所的に不均一な状態で伝達されるの
で、前述のFRやFHにおいても著しい振動節は生
じず、周波数特性上のピークやデイツプは分散さ
れて全体として周波数特性は平坦となる。
In the vibration system configured as described above, the outer periphery of the diaphragm 1 is bonded to the arc-shaped, intermittent extension 21 of the upper end of the voice coil bobbin 2, so that the rigidity in the circumferential direction near the outer periphery of the diaphragm is becomes uneven,
Furthermore, since the driving force from the voice coil bobbin 2 is transmitted to the diaphragm in a non-uniform manner locally, no significant vibration nodes occur even in the above-mentioned F R and F H , and no peaks or peaks in the frequency characteristics occur. The dips are dispersed and the frequency characteristics are flat as a whole.
更に周波数特性上に於て著しいピークが存在し
なくなることは、過度特性が良好となることをも
意味する。 Furthermore, the absence of significant peaks in the frequency characteristics also means that the transient characteristics become better.
本考案に係るドーム型スピーカーの振動系を第
１図ａ，ｂ〜第２図により詳述する。
The vibration system of the dome-shaped speaker according to the present invention will be explained in detail with reference to FIGS. 1a, b to 2.
ボイスコイルボビン２は駆動力を高能率で伝達
するために金属、硬質賦形材を含浸させた紙、布
もしくは高剛性充填材で強化した合成樹脂等、軽
量で高剛性の材料を円筒状に形成し、下端にはボ
イスコイル３が捲回され、上端部には振動板と等
曲率の延長部２１が形成され、当該延長部２１に
切欠部２２が少くとも１箇所（図示例においては
２箇所）設けられる。この延長部２１は図示例の
ごとくボビン材に切目を入れて折曲げたもので
も、また一体絞り成形されたものでもよい。 The voice coil bobbin 2 is made of lightweight, highly rigid material such as metal, paper impregnated with a hard excipient, cloth, or synthetic resin reinforced with a highly rigid filler in order to transmit driving force with high efficiency. A voice coil 3 is wound around the lower end, and an extension 21 having the same curvature as the diaphragm is formed at the upper end, and the extension 21 has at least one notch 22 (two in the illustrated example). ) provided. The extension portion 21 may be formed by cutting and bending a bobbin material as shown in the illustrated example, or may be formed by integral drawing.
振動板１は金属、硬質賦形材で含浸させた紙、
布、もしくは高剛性充填材で強化した合成樹脂等
軽量、高剛性材料からなり、その直径はボイスコ
イルボビン２の直径より小さく、前記したボイス
コイルボビン２の延長部２１に貼着され、ボイス
コイルボビン２とは当該延長部２１により結合さ
れ、切欠部２２においては〓間５が形成されてい
る。 The diaphragm 1 is made of metal, paper impregnated with a hard excipient,
It is made of lightweight, high-rigidity material such as cloth or synthetic resin reinforced with a high-rigidity filler, and its diameter is smaller than the diameter of the voice coil bobbin 2. are connected by the extension 21, and a gap 5 is formed in the notch 22.
このボイスコイルボビン２と振動板１との間に
形成される〓間５寸法ｄは振動板外周とボイスコ
イルボビン２とが接触しない程度の最小限の〓間
からボイスコイルボビン２の半径の50％程度まで
の範囲、また、前記切欠部２２の幅Ｗはボイスコ
イルボビン２の全周長の３〜50％程度であること
が実験結果により良好な結果を与える。 The gap 5 dimension d formed between the voice coil bobbin 2 and the diaphragm 1 ranges from a minimum gap that does not allow contact between the outer periphery of the diaphragm and the voice coil bobbin 2 to approximately 50% of the radius of the voice coil bobbin 2. According to experimental results, good results are obtained when the width W of the notch 22 is approximately 3 to 50% of the total circumferential length of the voice coil bobbin 2.
次いでエツジ４がボイスコイルボビン２の上端
部近傍に接着され振動系として完成される。 Next, the edge 4 is bonded near the upper end of the voice coil bobbin 2 to complete the vibration system.
尚、本考案の他の実施例として、第２図に示す
如く前記した切欠部におけるボイスコイルボビン
２上端部と振動板１外周部とで形成される〓間５
の部分をゴム等の粘弾性物質６を充填もしくは貼
着して閉ざしたものも本考案と同様な作用効果を
有し、更に振動板１背面の空気の流出入を防止し
て能率の低下を無くし、自由振動状態となつた振
動板１の外周部を制動し過渡特性を良好にする効
果を有する。 In addition, as another embodiment of the present invention, as shown in FIG.
A structure in which the part is closed by filling or pasting a viscoelastic substance 6 such as rubber has the same effect as the present invention, and also prevents air from flowing in and out of the back of the diaphragm 1, thereby reducing efficiency. This has the effect of damping the outer peripheral portion of the diaphragm 1, which is in a free vibration state, and improving the transient characteristics.
更に上記他の実施例の変形例として、エツジ４
を機械的内部ロスの大きい材料で製作し、当該エ
ツジ４の材料を一部分前記〓間５を覆うように振
動板１まで延長し、当該延長された部分を粘弾性
物質６として使用してもよい。この変形例は製作
が容易で、安価で且つ反共振抑制効果が優れてい
る特徴を有する。 Furthermore, as a modification of the other embodiments described above, Edge 4
may be made of a material with a large mechanical internal loss, a portion of the material of the edge 4 may be extended to the diaphragm 1 so as to cover the gap 5, and the extended portion may be used as the viscoelastic material 6. . This modification is easy to manufacture, inexpensive, and has an excellent anti-resonance suppressing effect.
第４図に本考案によるドーム型スピーカーの周
波数特性を従来例と比較して示す。
FIG. 4 shows the frequency characteristics of the dome-shaped speaker according to the present invention in comparison with a conventional example.
実施例として、振動板は、直径60mm、チタン振
動板、ボイスコイル直径65mm、Ｗ寸法約46mm、ｄ
寸法2.5mm、粘弾性体は布エツジ内周部を利用。 As an example, the diaphragm has a diameter of 60 mm, a titanium diaphragm, a voice coil diameter of 65 mm, a W dimension of approximately 46 mm, and a d
Dimensions: 2.5mm, the viscoelastic body uses the inner periphery of the fabric edge.
実線は本考案ドーム型スピーカーの特性で、点
線は従来例の特性である。 The solid line shows the characteristics of the dome-shaped speaker of the present invention, and the dotted line shows the characteristics of the conventional example.
従来例は約5KHz〜10KHzにおいて共振、反共
振に起因すると思われる大きなピークとデイツプ
が存在するが、本考案においてはこれらのピーク
やデイツプは分散されて消失し、周波数特性は平
坦となつていることから本考案に係る振動系の構
成が、ドーム型スピーカーの周波数特性を良好に
するのに極めて有効であることが明らかである。 In the conventional example, there are large peaks and dips that are thought to be caused by resonance and anti-resonance at approximately 5KHz to 10KHz, but in the present invention, these peaks and dips are dispersed and disappear, and the frequency characteristics are flat. Therefore, it is clear that the configuration of the vibration system according to the present invention is extremely effective in improving the frequency characteristics of a dome-shaped speaker.
第１図ａ，ｂ、および第２図は本考案ドーム型
スピーカーの振動系の正面図、２方向断面図、お
よび他の実施例の分解斜視図、第３図は一般的な
ドーム型スピーカーの断面図、第４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、２１は
延長部、２２は切欠部、３はボイスコイル、４は
エツジ、５は〓間、６は粘弾性物質である。
Figures 1a, b, and 2 are a front view, two-way sectional view, and an exploded perspective view of the vibration system of the dome-shaped speaker of the present invention, and Figure 3 is an exploded perspective view of the vibration system of the dome-shaped speaker of the present invention. The cross-sectional view and FIG. 4 are frequency characteristic diagrams. 1 is a diaphragm, 2 is a voice coil bobbin, 21 is an extension part, 22 is a notch part, 3 is a voice coil, 4 is an edge, 5 is a gap, and 6 is a viscoelastic material.
Claims (1)
ボイスコイルボビン２、当該ボイスコイルボビ
ン２に捲回されたボイスコイル３、および前記
ボイスコイルボビン２の上端近傍に接着された
エツジ４からなる振動系を有するドーム型スピ
ーカーにおいて、前記ボイスコイルボビン２上
端部に振動板１と同曲率の延長部２１を形成
し、当該延長部２１に１箇所以上切欠部２２を
設け、ボイスコイルボビン２より小直径の振動
板１を前記延長部２１に貼着し、前記切欠部２
２においてボイスコイルボビン２上端部と振動
板１外周との間に〓間５を形成させた構成の振
動系を有することを特徴とするドーム型スピー
カー。 ２ 前記〓間５を粘弾性物質６で閉鎖したことを
特徴とする実用新案登録請求の範囲第１項記載
のドーム型スピーカー。[Claims for Utility Model Registration] 1. A diaphragm 1, a voice coil bobbin 2 that transmits driving force to the diaphragm 1, a voice coil 3 wound around the voice coil bobbin 2, and an adhesive bonded near the upper end of the voice coil bobbin 2. In a dome-shaped speaker having a vibration system consisting of an edge 4, an extension part 21 having the same curvature as the diaphragm 1 is formed at the upper end of the voice coil bobbin 2, and one or more notches 22 are provided in the extension part 21, A diaphragm 1 having a smaller diameter than the voice coil bobbin 2 is attached to the extension part 21, and the notch part 2 is attached to the extension part 21.
2, a dome-shaped speaker characterized in that it has a vibration system configured such that a gap 5 is formed between the upper end of the voice coil bobbin 2 and the outer periphery of the diaphragm 1. 2. The dome-shaped speaker according to claim 1, wherein the gap 5 is closed with a viscoelastic material 6.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9186684U JPS617199U (en) | 1984-06-20 | 1984-06-20 | dome type speaker |
| US06/706,493 US4591667A (en) | 1984-03-06 | 1985-02-28 | Dome speaker with cut-out portions in the voice coil bobbin |
| DE19853507708 DE3507708A1 (en) | 1984-03-06 | 1985-03-05 | CALOTE SPEAKER |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9186684U JPS617199U (en) | 1984-06-20 | 1984-06-20 | dome type speaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS617199U JPS617199U (en) | 1986-01-17 |
| JPH0340000Y2 true JPH0340000Y2 (en) | 1991-08-22 |
Family
ID=30648135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9186684U Granted JPS617199U (en) | 1984-03-06 | 1984-06-20 | dome type speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS617199U (en) |
-
1984
- 1984-06-20 JP JP9186684U patent/JPS617199U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS617199U (en) | 1986-01-17 |
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