JPH0438637Y2 - - Google Patents
Info
- Publication number
- JPH0438637Y2 JPH0438637Y2 JP1984103439U JP10343984U JPH0438637Y2 JP H0438637 Y2 JPH0438637 Y2 JP H0438637Y2 JP 1984103439 U JP1984103439 U JP 1984103439U JP 10343984 U JP10343984 U JP 10343984U JP H0438637 Y2 JPH0438637 Y2 JP H0438637Y2
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- voice coil
- dome
- coil bobbin
- 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
- 239000000463 material Substances 0.000 claims description 8
- 230000001052 transient effect Effects 0.000 description 4
- 239000003190 viscoelastic substance Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229910000737 Duralumin Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 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
- 238000002474 experimental method Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229940006076 viscoelastic substance Drugs 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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隙に振動板
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 gap formed by the center pole 32 and the front plate 33 of the magnetic circuit, and the voice coil 36 receives a sound current. The diaphragm 35 is driven through the diaphragm 35 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
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 (F R ). Furthermore, 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
ーム型スピーカーの振動系は、ドーム形の振動板
１、当該振動板１の外周下面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と
ボイスコイルボビン２との結合部近傍に接着され
たエツジ４とからなる振動系を有するドーム形ス
ピーカーにおいて、前記振動板１が硬質の材料で
形成されると共に、振動板１とボイスコイルボビ
ン２との結合境界部分に周方向の幅が振動板１の
全周長の３〜50％で径方向の幅が振動板１の半径
長の50％以内であるスリツトもしくは小孔による
低剛性部５を１箇所以上前記振動板１とボイスコ
イルボビン２とに跨がらせて設けた振動系を有す
ることを特徴とするドーム型スピーカー。
In order to achieve the above object, the vibration system of the dome-shaped speaker according to the present invention includes a dome-shaped diaphragm 1, a voice coil bobbin 2 coupled to the lower outer circumferential surface of the diaphragm 1, and a winding around the voice coil bobbin 2. In a dome-shaped speaker having a vibration system consisting of a rotated voice coil 3 and an edge 4 bonded near the joint between the diaphragm 1 and the voice coil bobbin 2, the diaphragm 1 is formed of a hard material. In addition, the width in the circumferential direction of the joint boundary between the diaphragm 1 and the voice coil bobbin 2 is 3 to 50% of the total circumferential length of the diaphragm 1, and the width in the radial direction is within 50% of the radial length of the diaphragm 1. A dome-shaped speaker characterized by having a vibration system having one or more low-rigidity parts 5 formed by slits or small holes extending over the diaphragm 1 and the voice coil bobbin 2.
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 the significant anti-resonance and resonance in the conventional F R and F H are dispersed and caused by them. The dips and peaks in the frequency characteristics that occur due to this disappear, resulting in flat frequency characteristics, and at the same time, the significant resonance disappears, resulting in better transient characteristics, resulting in a marked improvement in the reproduced sound quality.
第１図〜第２図ａ，ｂにより本考案ドーム型ス
ピーカーの振動系の構成を詳述する。
The structure of the vibration system of the dome-shaped speaker of the present invention will be explained in detail with reference to FIGS. 1 to 2 a and b.
第１図において、１は振動板で金属、合成樹
脂、繊維状、鱗弁状、もしくは粉末状の高剛性充
填材で強化した剛性樹脂等の軽量で、高剛性の硬
質材料からなり、所定のドーム形に成形され、そ
の下面にボイスコイル３を捲回したボイスコイル
ボビン２が接着等で結合されている。或は振動板
１とボイスコイルボビン２とは同一材料で一体成
形により製作してもよい。 In Fig. 1, 1 is a diaphragm made of a lightweight, highly rigid hard material such as metal, synthetic resin, fibrous, scaly, or rigid resin reinforced with a powdered high-rigidity filler. It is formed into a dome shape, and a voice coil bobbin 2 having a voice coil 3 wound thereon is bonded to the lower surface thereof by adhesive or the like. Alternatively, the diaphragm 1 and the voice coil bobbin 2 may be made of the same material and manufactured by integral molding.
前記振動板１とボイスコイルボビン２との結合
された境界部にスリツト、もしくは小孔による低
剛性部５が１箇所以上（図では４箇所）設けられ
ている。 A low-rigidity portion 5 formed of a slit or a small hole is provided at one or more locations (four locations in the figure) at the boundary where the diaphragm 1 and the voice coil bobbin 2 are joined.
当該スリツトもしくは小孔の大きさとその数に
ついては、実験結果から、幅Ｗは振動板全周長の
３〜50％程度、径方向の幅ｄは単に切目程度の最
小限度の幅から振動板半径の50％程度、数量は１
箇所以上５箇所程度が良好な結果を与える。 Regarding the size and number of the slits or small holes, from experimental results, the width W is about 3 to 50% of the total circumference of the diaphragm, and the radial width d is just the minimum width of the cut to the radius of the diaphragm. Approximately 50% of , quantity is 1
Approximately 5 or more locations give good results.
駆動力を発生するボイスコイル２と振動系を支
持するエツジ４については従来例のドームスピー
カーと同構造である。尚エツジ４を貼着する位置
は前記した低剛性部５の範囲に含まれても差支え
は無い。この場合にはエツジ４の内周は、低剛性
部においては何ものにも接続されない状態とな
る。 The voice coil 2 that generates the driving force and the edge 4 that supports the vibration system have the same structure as the conventional dome speaker. Note that there is no problem even if the position where the edge 4 is attached is included in the range of the low-rigidity portion 5 described above. In this case, the inner periphery of the edge 4 is not connected to anything at the low rigidity portion.
上記実施例において、第２図ａ，ｂに示す様
に、前記した低剛性部５を含む周辺部分に粘弾性
物質６を充填、もしくは塗布、或は貼着してもよ
い。 In the above embodiment, as shown in FIGS. 2a and 2b, a viscoelastic substance 6 may be filled, applied, or adhered to the peripheral portion including the low-rigidity portion 5.
粘弾性物質６の機械的内部ロスにより高域にお
ける振動板の分割振動を抑制し、より一層周波数
特性や過渡特性を良好とすることができる。 The mechanical internal loss of the viscoelastic material 6 suppresses the split vibration of the diaphragm in high frequencies, making it possible to further improve frequency characteristics and transient characteristics.
第４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. 4 shows a comparison of the frequency characteristics of the dome-shaped speaker according to the present invention and a conventional example.
実験は本考案のドーム型スピーカで、点線は従
来例である。 The experiment was conducted using 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20KHzに反共
振によるデイツプと、30KHz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 at approximately 20KHz and a peak due to high-frequency resonance around 30KHz, 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
を過度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 made of a hard material and is lighter than a soft dome diaphragm, there is no drop in efficiency, and it is possible to obtain a dome-shaped speaker with excellent frequency characteristics and transient characteristics not seen in conventional examples. 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構
成を示す一部切欠き斜視図、第２図ａ，ｂ８他の
実施例の断面図、第３図は従来一般のドーム型ス
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、３はボ
イスコイル、４はエツジ、５は低剛性部、６は粘
弾性物質である。
Fig. 1 is a partially cutaway perspective view showing the configuration of the vibration system of the dome-shaped speaker of the present invention, Fig. 2 is a sectional view of other embodiments (a and b), Fig. 3 is a sectional view of a conventional dome-shaped speaker, FIG. 4 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 low rigidity portion, and 6 is a viscoelastic material.
Claims (1)
面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とボイスコイルボビン
２との結合部近傍に接着されたエツジ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が硬質の材料で形成されると
共に、振動板１とボイスコイルボビン２との結
合境界部分に周方向の幅が振動板１の全周長の
３〜50％で径方向の幅が振動板１の半径長の50
％以内であるスリツトもしくは小孔による低剛
性部５を１箇所以上前記振動板１とボイスコイ
ルボビン２とに跨がらせて設けた振動系を有す
ることを特徴とするドーム型スピーカー。 ２ 前記振動板１と前記ボイスコイルボビン２と
が一体成形されている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 dome-shaped diaphragm 1, a voice coil bobbin 2 coupled to the lower outer circumference of the diaphragm 1, a voice coil 3 wound around the voice coil bobbin 2, and the diaphragm 1. In a dome-shaped speaker having a vibration system consisting of an edge 4 glued near the joint with the voice coil bobbin 2, the diaphragm 1 is formed of a hard material, and the diaphragm 1 and the voice coil bobbin 2 are joined together. At the boundary part, the width in the circumferential direction is 3 to 50% of the total circumferential length of the diaphragm 1, and the width in the radial direction is 50% of the radial length of the diaphragm 1.
A dome-shaped speaker characterized in that it has a vibration system in which a low-rigidity part 5 formed by a slit or a small hole of less than 10% is provided at one or more locations spanning the diaphragm 1 and the voice coil bobbin 2. 2. The dome-shaped speaker according to claim 1, wherein the diaphragm 1 and the voice coil bobbin 2 are integrally molded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10343984U JPS6118694U (en) | 1984-07-09 | 1984-07-09 | dome type speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10343984U JPS6118694U (en) | 1984-07-09 | 1984-07-09 | dome type speaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6118694U JPS6118694U (en) | 1986-02-03 |
| JPH0438637Y2 true JPH0438637Y2 (en) | 1992-09-09 |
Family
ID=30662834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10343984U Granted JPS6118694U (en) | 1984-07-09 | 1984-07-09 | dome type speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6118694U (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH018153Y2 (en) * | 1985-12-23 | 1989-03-03 | ||
| JPH0744154Y2 (en) * | 1986-08-26 | 1995-10-09 | フォスター電機株式会社 | Speaker diaphragm |
| JPH07103977B2 (en) * | 1987-07-20 | 1995-11-08 | 日本原子力研究所 | Microwave incineration method and apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55155183U (en) * | 1979-04-20 | 1980-11-08 |
-
1984
- 1984-07-09 JP JP10343984U patent/JPS6118694U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6118694U (en) | 1986-02-03 |
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