JPH0448073Y2 - - Google Patents
Info
- Publication number
- JPH0448073Y2 JPH0448073Y2 JP1984115710U JP11571084U JPH0448073Y2 JP H0448073 Y2 JPH0448073 Y2 JP H0448073Y2 JP 1984115710 U JP1984115710 U JP 1984115710U JP 11571084 U JP11571084 U JP 11571084U JP H0448073 Y2 JPH0448073 Y2 JP H0448073Y2
- 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
Links
- 239000000463 material Substances 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims 1
- 230000001052 transient effect Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 239000003190 viscoelastic substance Substances 0.000 description 2
- 229910000737 Duralumin Inorganic materials 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007779 soft material Substances 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4図に示すご
とく、マグネツト41、センターポール42、フ
ロントプレート43、およびバツクプレート44
よりなる磁気回路のセンターポール42とフロン
トプレート43とで形成される磁気空隙に振動板
45の外周に固着したボイスコイル46が位置す
るごとくにエツジ47により振動板を支持し、ボ
イスコイル46に音声電流を通じて振動板45を
駆動し音波を放射する。
A dome-shaped speaker generally has a magnet 41, a center pole 42, a front plate 43, and a back plate 44, as shown in FIG.
The diaphragm is supported by edges 47 so that the voice coil 46 fixed to the outer periphery of the diaphragm 45 is positioned in the magnetic gap formed by the center pole 42 and the front plate 43 of the magnetic circuit. The diaphragm 45 is driven through electric current to emit sound waves.
振動板45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 45 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***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***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 phase of the diaphragm outside and inside this vibration node is opposite to each other, the frequency of the anti-resonance is
A dip occurs in the frequency characteristics in FR .
Furthermore, a peak was generated at the subsequent high-frequency resonance frequency FH , resulting in deterioration of frequency characteristics and transient characteristics, which impairs the sense of 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***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、***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
さのスリツト5が1箇所以上、振動板1の周辺部
近傍の***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 is formed at one or more locations at a position that includes the nodal circle of the anti-resonance mode near the periphery of the diaphragm 1. At the same time, a voice coil bobbin 2, which has a smaller diameter than the diaphragm 1 and has a voice coil 3 wound around its lower end, is bonded to the spherical part of the diaphragm 1.
It is characterized by having a vibration system configured to drive the inner circumferential portion of.
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***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.
第1図a,b〜第3図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. 1a and 1b to 3.
第1図において、1は振動板で金属、合成樹
脂、繊維状、鱗片状、もしくは粉末状の高剛性充
填材で強化した合成樹脂等の軽量で、高剛性の硬
質材料からなり、そのドーム形の周辺部にはスリ
ツト5が設けられる。 In Fig. 1, the diaphragm 1 is made of a lightweight, highly rigid hard material such as metal, synthetic resin, synthetic resin reinforced with fibrous, scaly, or powdered high-rigidity filler, and has a dome shape. A slit 5 is provided around the periphery.
当該スリツトの大きさは、前記したFHにおけ
る振動節を含む範囲であつて、その幅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(図示例では2箇所)5箇所程
度が実験により良好な結果を示す。 The size of the slit is within the range that includes the vibration node at FH mentioned above, the width W is about 3 to 50% of the total circumference of the diaphragm, and the radial width d is the minimum width of a cut. Approximately 50% of the diaphragm radius from the width,
Experiments have shown that good results are obtained with one or more locations (two locations in the illustrated example) of about five locations.
またスリツト形状は図示の如く直線状である必
要は無い。振動板外周と平行な円弧、またその逆
方向の円弧、或は任意の曲線等、前述したFHに
おける振動節をその一部に含む限り、形状を限定
しない。 Further, the slit shape does not need to be linear as shown in the figure. The shape is not limited, such as a circular arc parallel to the outer circumference of the diaphragm, a circular arc in the opposite direction, or an arbitrary curve, as long as the above-mentioned vibration node at FH is included in a part thereof.
エツジ4は一般には別部材として成形され、振
動板1の外周に接着されるが、製造上の都合上、
振動板1と一体に成形されることもある。 The edge 4 is generally formed as a separate member and adhered to the outer periphery of the diaphragm 1, but due to manufacturing reasons,
It may be molded integrally with the diaphragm 1.
ボイスコイル3は振動板よりも小径とし、ボイ
スコイルボビン2上端で振動板1の内周部に接着
される。尚ボイスコイルボビン2は、前記した振
動板1のスリツト5の部位に接着されていてもよ
い。 The voice coil 3 has a smaller diameter than the diaphragm, and is bonded to the inner circumference of the diaphragm 1 at the upper end of the voice coil bobbin 2. Note that the voice coil bobbin 2 may be bonded to the slit 5 of the diaphragm 1 described above.
ボイスコイル3を振動板1の凹面側に接着する
(第1図と第2図)か、もしくは凸面側に接着す
る(第3図)かは設計上の目的により任意に選択
し得る。 Whether the voice coil 3 is bonded to the concave side of the diaphragm 1 (FIGS. 1 and 2) or the convex side (FIG. 3) can be arbitrarily selected depending on the design purpose.
凹面側に接着した場合はボイスコイルボビンが
長くなり重量増のためスピーカーの変換能率の点
からはよくないが、音響放射面が凸面となり指向
性が平面又は凹面からの輻射よりブロードとなる
特徴を有する。凸面側に接着した場合は上記凹面
側とは逆の特徴を有する。 If it is glued to the concave side, the voice coil bobbin becomes longer and the weight increases, which is not good in terms of the conversion efficiency of the speaker, but it has the characteristic that the sound radiation surface becomes a convex surface and the directivity is broader than radiation from a flat or concave surface. . When bonded on the convex side, the characteristics are opposite to those on the concave side.
上記実施例において、第2〜3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度
特性を尚一層良好にする効果を有する。また、第
3図に示すごとく振動板1とは別に、硬質材料で
製作されたエツジ4内周を振動板1に沿つて一部
分延長して延長部7を形成し、当該延長部7でス
リツト5部分を覆つた構成の振動系も本考案の技
術範囲に属する。 In the above embodiment, the cutout 5 may be closed with a viscoelastic material 7 as shown in FIGS. 2 and 3. 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. In addition, as shown in FIG. 3, apart from the diaphragm 1, the inner periphery of the edge 4 made of a hard material is partially extended along the diaphragm 1 to form an extension 7, and the extension 7 opens the slit 5. A vibration system having a structure that covers a portion also belongs to the technical scope of the present invention.
第5図に本考案によるドーム型スピーカーの特
性を従来例と比較して示す。
FIG. 5 shows the characteristics of the dome-shaped speaker according to the present invention in comparison with a conventional example.
実線の特性は第1図による実施例の特性で振動
板径25mm、スリツトのw寸法10mm、d寸法2mmで
ある。 The characteristics shown by the solid line are those of the embodiment shown in FIG. 1, where the diameter of the diaphragm is 25 mm, the w dimension of the slit is 10 mm, and the d dimension is 2 mm.
点線の特性は同一直径の振動板を有する従来例
の特性である。 The characteristics indicated by the dotted line are those of a conventional example having diaphragms of the same diameter.
従来例スピーカーの特性にはほぼ20KHzに***
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***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 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.
また振動板より小径のボイスコイルを用い、小
範囲の磁気空隙に磁束を集中させて高磁束密度と
することができるので、小形の磁気回路でありな
がら高変換能率とすることができ、経済的であ
る。 In addition, by using a voice coil with a smaller diameter than the diaphragm, it is possible to concentrate the magnetic flux in a small magnetic gap and achieve a high magnetic flux density, so it is possible to achieve high conversion efficiency even with a small magnetic circuit, making it economical. It is.
更に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。 Furthermore, since the diaphragm is mainly made of a hard material and is lighter than a soft dome diaphragm, there is no drop in efficiency, and a dome-shaped speaker with excellent frequency characteristics and transient characteristics not seen in the past can be obtained. It is something that can be done.
第1図a,bは本考案ドーム型スピーカーの振
動系の正面図、側半断面図、第2図、第3図はそ
れぞれ本考案の他の実施例の振動系の半断面図、
第4図は従来一般のドーム型スピーカーの断面
図、第5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はスリツト、6は粘
弾性物質、7は延長部である。
1a and 1b are front views and side half-sectional views of the vibration system of the dome-shaped speaker of the present invention, and FIGS. 2 and 3 are half-sectional views of the vibration system of other embodiments of the present invention, respectively.
FIG. 4 is a sectional view of a conventional general dome-shaped speaker, and FIG. 5 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 slit, 6 is a viscoelastic material, and 7 is an extension part.
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3〜50%で且つ半径方向の幅が振動
板1の半径の50%以内の大きさのスリツト5が1
箇所以上、振動板1の周辺部近傍の***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.
The slit 5 has a size of 3 to 50% of the total circumference of the diaphragm 1 and a radial width within 50% of the radius of the diaphragm 1.
The voice coil bobbin 2 is formed at a position that includes the nodal circle of the anti-resonance mode near the periphery of the diaphragm 1, has a smaller diameter than the diaphragm 1, and has a voice coil 3 wound around the lower end thereof. A dome-shaped speaker characterized by having a vibration system configured to be bonded to a spherical part of a diaphragm 1 to drive an inner peripheral part of the diaphragm 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11571084U JPS6133588U (en) | 1984-07-28 | 1984-07-28 | dome type speaker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11571084U JPS6133588U (en) | 1984-07-28 | 1984-07-28 | dome type speaker |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6133588U JPS6133588U (en) | 1986-02-28 |
JPH0448073Y2 true JPH0448073Y2 (en) | 1992-11-12 |
Family
ID=30674668
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11571084U Granted JPS6133588U (en) | 1984-07-28 | 1984-07-28 | dome type speaker |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6133588U (en) |
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
- 1984-07-28 JP JP11571084U patent/JPS6133588U/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 |
---|---|
JPS6133588U (en) | 1986-02-28 |
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