JPH0129912Y2 - - Google Patents
Info
- Publication number
- JPH0129912Y2 JPH0129912Y2 JP11570984U JP11570984U JPH0129912Y2 JP H0129912 Y2 JPH0129912 Y2 JP H0129912Y2 JP 11570984 U JP11570984 U JP 11570984U JP 11570984 U JP11570984 U JP 11570984U JP H0129912 Y2 JPH0129912 Y2 JP H0129912Y2
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- voice coil
- dome
- extension part
- edge
- 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 18
- 239000000546 pharmaceutical excipient Substances 0.000 claims description 13
- 239000004744 fabric Substances 0.000 claims description 3
- 239000004745 nonwoven fabric Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 4
- 239000000835 fiber Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 229910000737 Duralumin Inorganic materials 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000003190 viscoelastic substance Substances 0.000 description 1
- 239000002759 woven fabric 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３とで形成される磁気空隙に振動板３
５の外周に固着したボイスコイル３６が位置する
ごとくにエツジ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 diaphragm 3 is placed in the magnetic gap formed by the center pole 32 of the magnetic circuit and the front plate 3.
The diaphragm is supported by an edge 37 such that a voice coil 36 fixed to the outer periphery of the diaphragm 5 is located, and a sound current is passed through the voice coil 36 to drive the diaphragm 35 and 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
に内部損矢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 occurred at the subsequent high-frequency resonance frequency FH , resulting in deterioration of frequency characteristics and transient characteristics, which impaired 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携を使用して、
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 a vibrator that has been improved so that anti-resonance is less likely to occur.
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、エツジが布、ある
いは不織布のごとき繊維質基材に硬、軟２種類の
賦形材を含浸、成形した複合材料からなり、その
内周部に振動板と同一曲率の延長部を設け、当該
延長部の内周辺にボイスコイルより小径の振動板
が粘着され、当該振動板より外側の前記延長部に
部分的に軟質の賦形材を使用した柔軟部を１箇所
以上設け、残余の部分は硬質の賦形材を使用して
高剛性部とし、延長部の剛性が周方向に対し、場
所的に変化するごとくに構成された振動系であ
る。
In order to achieve the above object, the vibration system of the dome-shaped speaker according to the present invention is made of a composite material whose edges are made of a fibrous base material such as cloth or non-woven fabric impregnated with two types of excipients, hard and soft. A diaphragm with a smaller diameter than the voice coil is attached to the inner periphery of the diaphragm, and a diaphragm with a smaller diameter than the voice coil is attached to the inner periphery of the diaphragm, and a diaphragm with a smaller diameter than the voice coil is attached to the inner periphery of the diaphragm. One or more flexible parts using soft excipient material are provided, and the remaining parts are made into high rigidity parts using hard excipient material, so that the rigidity of the extension part changes depending on the location in the circumferential direction. It is a vibration system configured as follows.
上記した構成の振動系においては、振動板に結
合されたエツジ内周の延長部の剛性が場所的に異
なつているので結果的に振動板外周近傍の周方向
に沿つた剛性は不均一となり、その上ボイスコイ
ルボビンからの駆動力が当該延長部を介して振動
板外周に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の節もしく
は腹は生ぜず、周波数特性上のピークやデイツプ
は分散され周波数特性を平坦にすると同時に、ボ
イスコイルボビンが振動板に直結されていないの
で延長部のスチフネスがハイカツトフイルターと
して作用し、不用な高域を遮断する作用を有す
る。更に、著しいピークが存在しなくなることは
過渡特性が良好となることをも意味する。
In the vibration system configured as described above, the stiffness of the extension of the inner circumference of the edge connected to the diaphragm varies depending on the location, and as a result, the stiffness along the circumferential direction near the outer periphery of the diaphragm becomes non-uniform. Furthermore, since the driving force from the voice coil bobbin is transmitted unevenly to the outer circumference of the diaphragm through the extension, no significant vibration nodes or antinodes occur in the above-mentioned F R and F H. Peaks and dips in the frequency response are dispersed, making the frequency response flat. At the same time, since the voice coil bobbin is not directly connected to the diaphragm, the stiffness of the extension acts as a high-cut filter, blocking unnecessary high frequencies. have Furthermore, the absence of significant peaks 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〜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. 1 and 2.
ボイスコイルボビン２は従来と同一の材料で円
筒形に仕上げられ、下端部にボイスコイル３が捲
回される。 The voice coil bobbin 2 is finished in a cylindrical shape using the same material as the conventional one, and the voice coil 3 is wound around the lower end.
振動板１は金属、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の直径より小直径となつてい
る。 The diaphragm 1 is made of metal, paper impregnated with a hard excipient,
It is made of a lightweight, highly rigid material such as cloth or synthetic resin reinforced with a highly rigid filler, and its diameter is smaller than that of the voice coil bobbin 2.
エツジ４は合成繊維、天然繊維、或は無機質高
剛性繊維等からなる織布又は不織布等の基材１３
に部分的に異質の賦形材を含浸させ、エツジ形状
の内周部に振動板１と同一曲率の延長部４１を一
体的に熱成形したものであつて、振動板１より外
側の前記延長部４１に１箇所以上（図示例では４
箇所）に、例えばゴムの如き軟質の賦形材を含浸
させた柔軟部４２を設け、残余の領域に例えばエ
ポキシ樹脂等硬質の賦形材を含浸させて硬質部４
３が形成されている。本考案の目的を実現するこ
めに、成形後における硬質部４３の剛性は柔軟部
４２の剛性に対して２倍以上であることが望まし
い。また、前記柔軟部４２の賦形材を省略したも
の、域は、同部分に賦形材を省略して成形し、成
形後当該柔軟部４２にゴム等の粘弾性体を塗布し
たものも同様の作用効果を有するので、本考案の
技術範囲に属する。 The edge 4 is a base material 13 such as a woven or nonwoven fabric made of synthetic fibers, natural fibers, or inorganic high-rigidity fibers.
is partially impregnated with a different excipient material, and integrally thermoformed with an extension part 41 having the same curvature as the diaphragm 1 on the edge-shaped inner periphery, and the extension part 41 on the outside of the diaphragm 1 One or more places in the section 41 (4 in the illustrated example)
A flexible part 42 impregnated with a soft excipient material such as rubber is provided in the remaining area (part), and a hard part 42 is provided by impregnating the remaining area with a hard excipient material such as epoxy resin.
3 is formed. In order to achieve the purpose of the present invention, it is desirable that the rigidity of the hard part 43 after molding is at least twice the rigidity of the flexible part 42. In addition, the same applies to those in which the excipient material of the flexible portion 42 is omitted, and those in which the excipient material is omitted in the same portion and molded, and a viscoelastic material such as rubber is applied to the flexible portion 42 after molding. Since it has the following effects, it falls within the technical scope of the present invention.
尚、柔軟部４２の大きさは、実験結果によれ
ば、幅Ａはエツジ４内周の全周長の３〜33％程
度、径方向の深さｄは半径の１〜50％程度、もし
くは高さ方向の深さＨは振動板１全高の10〜80％
程度が適当である。また柔軟部４２の形状は図示
のものは振動板１外周とエツジ４内周で囲まれた
弓形であるが、上記した大きさに含まれる限り形
状は限定されない。更に柔軟部４２が複数箇所に
分布するときには、それぞれの柔軟部が同形状で
ある必要はない。むしろ、異なる形状、分布状態
の方が前述した共振の分散効果はより増大する傾
向を示す。 According to experimental results, the size of the flexible portion 42 is such that the width A is approximately 3 to 33% of the total circumference of the inner circumference of the edge 4, and the radial depth d is approximately 1 to 50% of the radius. The depth H in the height direction is 10 to 80% of the total height of the diaphragm 1.
The degree is appropriate. Further, although the shape of the flexible portion 42 shown in the drawing is an arcuate shape surrounded by the outer periphery of the diaphragm 1 and the inner periphery of the edge 4, the shape is not limited as long as it falls within the above-mentioned size. Furthermore, when the flexible portions 42 are distributed at multiple locations, it is not necessary that each flexible portion has the same shape. Rather, different shapes and distribution states tend to increase the resonance dispersion effect described above.
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.
実線の特性は図示した本考案ドーム型スピーカ
ーの特性、点線は従来例の特性である。実施例は
振動板直径25mmの高音用ドーム型スピーカーであ
つて、従来例では振動板の***振および共振によ
り、20KHzに著しいデイツプ、30KHzに高レベル
のピークが出現しているが、本考案ドーム型スピ
ーカーにおいてはこれらのピークやデイツプは消
失し、更に22KHz附近以上の不用な帯域は遮断さ
れている。その上能率の低下は見られない。これ
は振動節を生じる部位の剛性が場所的に不均一で
あるために著しい共振や***振が分散されたこ
と、更に柔軟部により高域の駆動力が一部減衰さ
れること、また振動板の重量が増加していないた
めであると思われる。 The solid line indicates the characteristics of the illustrated dome-shaped speaker of the present invention, and the dotted line indicates the characteristics of the conventional example. The example is a high-pitched dome-shaped speaker with a diaphragm diameter of 25 mm.In the conventional example, a significant dip appears at 20KHz and a high-level peak appears at 30KHz due to anti-resonance and resonance of the diaphragm, but the dome of the present invention In the type speaker, these peaks and dips disappear, and unnecessary bands around 22KHz and above are further cut off. Moreover, no decrease in efficiency is observed. This is because the rigidity of the parts that produce vibration nodes is uneven locally, which disperses significant resonance and anti-resonance, and also because the high-frequency driving force is partially attenuated by the flexible parts, and the diaphragm This seems to be because the weight of the
第１図、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、断面図、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、３はボ
イスコイル、４はエツジ、４１は延長部、４２は
柔軟部である。
1 and 2 are a front view and a sectional view of the vibration system of the dome-shaped speaker of the present invention, FIG. 3 is a sectional view of a general dome-shaped speaker, and 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, 41 is an extension part, and 42 is a flexible part.
Claims (1)
２、および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、前記ボイスコイルボビン
２の上端部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
記エツジ４が布、あるいは不織布等の繊維質基
材に硬、軟２種類の賦形材を合浸した複合材料
からなり、その内周部に振動板と同一曲率の延
長部４１が一体成形され、当該延長部４１の先
端にボイスコイル３より小直径の振動板１が接
着され、当該振動板１より外側の前記エツジ４
の延長部４１に部分的に軟質の賦形材を使用し
た柔軟部４２を１箇所以上形成し、残余の部分
は硬質の賦形材を使用して高剛性とすることに
より当該延長部４１の剛性が場所的に不均一と
なるようにし、前記エツジ４内周部下面にボイ
スコイルボビン２を接着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。 ２ 前記延長部４１の柔軟部４２を、軟質の賦形
材を省略することにより形成したことを特徴と
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 Consists of a dome-shaped diaphragm 1, a voice coil bobbin 2, a voice coil 3 wound around the voice coil bobbin 2, and an edge 4 bonded to the upper end of the voice coil bobbin 2. In a dome-shaped speaker having a vibration system, the edge 4 is made of a composite material obtained by impregnating a fibrous base material such as cloth or non-woven fabric with two types of excipients, hard and soft, and has a diaphragm and a diaphragm on its inner periphery. An extension part 41 having the same curvature is integrally molded, a diaphragm 1 having a smaller diameter than the voice coil 3 is adhered to the tip of the extension part 41, and the edge 4 outside the diaphragm 1 is bonded to the end of the extension part 41.
By forming one or more flexible parts 42 partially using a soft excipient material in the extension part 41 of the extension part 41, and making the remaining part highly rigid by using a hard excipient material, the extension part 41 is A dome-shaped speaker characterized by having a vibration system having a configuration in which rigidity is locally non-uniform and a voice coil bobbin 2 is bonded to the lower surface of the inner periphery of the edge 4. 2. The dome-shaped speaker according to claim 1, wherein the flexible portion 42 of the extension portion 41 is formed by omitting a soft excipient material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11570984U JPS6133589U (en) | 1984-07-28 | 1984-07-28 | dome type speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11570984U JPS6133589U (en) | 1984-07-28 | 1984-07-28 | dome type speaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6133589U JPS6133589U (en) | 1986-02-28 |
| JPH0129912Y2 true JPH0129912Y2 (en) | 1989-09-12 |
Family
ID=30674667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11570984U Granted JPS6133589U (en) | 1984-07-28 | 1984-07-28 | dome type speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6133589U (en) |
-
1984
- 1984-07-28 JP JP11570984U patent/JPS6133589U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6133589U (en) | 1986-02-28 |
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