JPH03796Y2 - - Google Patents
Info
- Publication number
- JPH03796Y2 JPH03796Y2 JP11571184U JP11571184U JPH03796Y2 JP H03796 Y2 JPH03796 Y2 JP H03796Y2 JP 11571184 U JP11571184 U JP 11571184U JP 11571184 U JP11571184 U JP 11571184U JP H03796 Y2 JPH03796 Y2 JP H03796Y2
- Authority
- JP
- Japan
- Prior art keywords
- voice coil
- diaphragm
- coil bobbin
- edge
- dome
- 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 12
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000007779 soft material Substances 0.000 claims description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- 230000001052 transient effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229910000737 Duralumin Inorganic materials 0.000 description 1
- 230000005540 biological transmission 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
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000003190 viscoelastic substance 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
よりなる磁器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 edge 37 supports the diaphragm 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. 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***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
（R）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（H）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 ( R ).
Furthermore, a peak occurred at the subsequent high resonance frequency ( H ), deteriorating the frequency characteristics and transient characteristics, and impairing 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の本考案に係るドー
ム型スピーカーは、ドーム型の振動板１、当該振
動板１の外周下方に結合されたボイスコイルボビ
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及びボイスコイルボビン２と振動板
１を振動可能に支持するエツジ４とからなる振動
系を有し、当該振動系の前記ボイスコイルボビン
２が硬質の材料からなると共にその上端部に１箇
所以上切欠部２１を設け、軟質の材料からなり且
つ内周部に少なくとも前記ボイスコイルボビン２
の切欠部２１を覆う大きさの折曲部４１を形成し
たエツジ４を前記ボイスコイルボビン２上端部に
接着することによつて前記切欠部２１が折曲部４
１により覆われた状態とし、硬質の材料からなる
振動板１を前記エツジ４の内周部に接着した構成
と成つている。
A dome-shaped speaker according to the present invention for achieving the above object includes a dome-shaped diaphragm 1, a voice coil bobbin 2 coupled to the lower outer circumference of the diaphragm 1, and a voice coil wound around the voice coil bobbin 2. The voice coil bobbin 2 of the vibration system is made of a hard material and has one or more notches at its upper end. 21, which is made of a soft material and has at least the voice coil bobbin 2 on the inner circumference.
By adhering the edge 4 having a bent portion 41 large enough to cover the notch 21 to the upper end of the voice coil bobbin 2, the notch 21 forms the bent portion 4.
1, and a diaphragm 1 made of a hard material is bonded to the inner peripheral portion of the edge 4.
上記構成の振動系では、ボイスコイルボビン２
に切欠部２１が設けられているので、当該ボイス
コイルボビン２の上端部に結合されているエツジ
４の内周部及び当該エツジ４の内周部に接着され
ている振動板１に対する補強作用が均一で無く、
振動板１にとつて外周近傍の剛性が周方向にそつ
て場所的にことなるので、前述の従来例のような
RやHに於ける著しい***振や共振は本考案の実
施例に於いては分散され、更に切欠部２１を覆う
エツジ４の折曲部４１の内部ロスによつて高域周
波数における振動板の分割振動エネルギーが吸収
されるので、上記***振や共振に起因して発生し
ていた周波数特性上のピークやデイツプは消失し
て平坦な周波数特性となる。
In the vibration system with the above configuration, the voice coil bobbin 2
Since the notch 21 is provided in the upper end of the voice coil bobbin 2, the reinforcing effect on the inner periphery of the edge 4 coupled to the upper end of the voice coil bobbin 2 and the diaphragm 1 bonded to the inner periphery of the edge 4 is uniform. Not, but
Since the stiffness near the outer periphery of the diaphragm 1 differs in places along the circumferential direction,
Significant anti-resonance and resonance in R and H are dispersed in the embodiment of the present invention, and furthermore, due to the internal loss of the bent portion 41 of the edge 4 covering the notch 21, the vibration of the diaphragm at high frequencies is reduced. Since the divided vibration energy is absorbed, the peaks and dips in the frequency characteristics that have occurred due to the anti-resonance and resonance disappear, resulting in flat frequency characteristics.
又、振動板における著しい共振が消失すること
により過度特性も良好となるので、再生音質は著
しく改善される。 Furthermore, since the significant resonance in the diaphragm disappears, the transient characteristics also become better, so the reproduced sound quality is significantly improved.
〔実施例〕
第１図〜第２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。[Example] 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 and 2.
１は振動板で、金属、合成樹脂、繊維状又は燐
片状若しくは粉末状で高剛性の充填材で強化した
合成樹脂等の、軽量で且つ高剛性な硬質材料をド
ーム形に成形してなる。 1 is a diaphragm made of a lightweight and highly rigid hard material such as metal, synthetic resin, fiber, scaly, or powdered synthetic resin reinforced with a highly rigid filler, molded into a dome shape. .
２はボイスコイルボビンで、同じく硬質材料か
らなり、上端部に切欠部２１が１箇所以上設けら
れている。実験結果によると当該切欠部２１の大
きさは、第２図において周方向の幅Ｗはボイスコ
イルボビン２の全周長の７〜50％、上下方向の幅
ｄは、エツジ４をボイスコイルボビン２の上端に
結合したとき切欠部２１の下端部位がエツジ４の
下面より下方に突出すると同時に、当該切欠部２
１がエツジ４の折曲部４１で覆われたときに折曲
部４１が振動系の振動にともなつて磁気回路に接
触することがないような寸法範囲に選定される。 Reference numeral 2 denotes a voice coil bobbin, which is also made of a hard material and has one or more notches 21 at its upper end. According to the experimental results, the size of the notch 21 is such that the width W in the circumferential direction is 7 to 50% of the total circumference of the voice coil bobbin 2 in FIG. When coupled to the upper end, the lower end portion of the notch 21 protrudes downward from the lower surface of the edge 4, and at the same time, the notch 21
The dimension range is selected such that when the bent portion 41 of the edge 4 covers the bent portion 41, the bent portion 41 does not come into contact with the magnetic circuit due to the vibration of the vibration system.
切欠部２１のの個数は、本実施例では４か所で
あるが、１箇所以上８箇所までが周波数特性の改
善に対し良好な結果を得る。 Although the number of notches 21 is four in this embodiment, good results are obtained in improving the frequency characteristics when one to eight locations are used.
４はエツジで、内部ロスが大きい合成樹脂シー
ト又は粘弾性材を含浸塗布した布等を成形してな
り、内周部に前記切欠部２１を覆うための折曲部
４１が形成されている。当該折曲部４１は第１図
のように切欠部２１に対応して設けてもよく、ま
た第２図のようにボイスコイルボビン２の上部全
周を覆うように設けてもよい。 Reference numeral 4 denotes an edge, which is formed from a synthetic resin sheet with a large internal loss or a cloth impregnated with a viscoelastic material, and has a bent portion 41 for covering the cutout portion 21 at the inner peripheral portion. The bent portion 41 may be provided corresponding to the notch 21 as shown in FIG. 1, or may be provided so as to cover the entire upper circumference of the voice coil bobbin 2 as shown in FIG.
当該エツジ４はボイスコイルボビン４の上端部
に接着されるが、第１図のようにボイスコイルボ
ビン２の上端面がエツジ４の下面に当接し、折曲
部４１が内側から切欠部２１を覆うようにするこ
とができる。この構造は振動板下面とボイスコイ
ルボビン上端面との間にエツジ材料が存在し、エ
ツジ材料の物性が駆動力の伝達に影響を与えるの
で、周波数特性の制御手段として利用し得る。 The edge 4 is bonded to the upper end of the voice coil bobbin 4, and as shown in FIG. It can be done. In this structure, an edge material exists between the lower surface of the diaphragm and the upper end surface of the voice coil bobbin, and the physical properties of the edge material affect the transmission of driving force, so it can be used as a means for controlling frequency characteristics.
一方、第２図のように外側から覆い、ボイスコ
イルボビン２の上端面とエツジ４の上面が同一面
となるようにしてもよい。 On the other hand, as shown in FIG. 2, it may be covered from the outside so that the upper end surface of the voice coil bobbin 2 and the upper surface of the edge 4 are on the same plane.
次に振動板１がエツジ４の内周部に接着されて
振動系を構成する。 Next, the diaphragm 1 is adhered to the inner circumference of the edge 4 to constitute a oscillation system.
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.
実線は本考案のドーム型スピーカーで、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。 In addition, since the diaphragm is mainly made of a 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
一部切欠分解斜視図、第２図は他の実施例の断面
図、第３図は従来の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
切欠部、３はボイスコイル、４はエツジ、４１は
折曲部である。
Fig. 1 is a partially cutaway exploded perspective view of the vibration system of the dome-shaped speaker of the present invention, Fig. 2 is a sectional view of another embodiment, Fig. 3 is a sectional view of a conventional general dome-shaped speaker, and Fig. 4 The figure is a frequency characteristic diagram. 1 is a diaphragm, 2 is a voice coil bobbin, 21 is a notch, 3 is a voice coil, 4 is an edge, and 41 is a bent portion.
Claims (1)
に結合された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及び
ボイスコイルボビン２と振動板１を振動可能に支
持するエツジ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、前記ボイスコイルボビン
２が硬質の材料からなると共に上端部に１箇所以
上切欠部２１を設け、軟質の材料からなり且つ内
周部に少なくともボイスコイルボビン２の切欠部
２１を覆う大きさの折曲部４１を形成したエツジ
４を前記ボイスコイルボビン２上端部に接着する
ことによつて前記切欠部２１が折曲部４１により
覆われた状態とし、硬質の材料からなる振動板１
を前記エツジ４の内周部に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。 A dome-shaped diaphragm 1, a voice coil bobbin 2 coupled to the lower outer periphery of the diaphragm 1, a voice coil 3 wound around the voice coil bobbin 2, and an edge 4 that vibrably supports the voice coil bobbin 2 and the diaphragm 1. In the dome-shaped speaker, the voice coil bobbin 2 is made of a hard material and has one or more notches 21 at the upper end, and is made of a soft material and has at least one part of the voice coil bobbin 2 in the inner peripheral part. By adhering the edge 4 having a bent portion 41 large enough to cover the notch 21 to the upper end of the voice coil bobbin 2, the notch 21 is covered with the bent portion 41, and the hard material is A diaphragm 1 consisting of
A dome-shaped speaker characterized in that it has a vibration system configured by adhering the edge 4 to the inner circumferential portion of the edge 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11571184U JPS6133595U (en) | 1984-07-28 | 1984-07-28 | dome type speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11571184U JPS6133595U (en) | 1984-07-28 | 1984-07-28 | dome type speaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6133595U JPS6133595U (en) | 1986-02-28 |
| JPH03796Y2 true JPH03796Y2 (en) | 1991-01-11 |
Family
ID=30674669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11571184U Granted JPS6133595U (en) | 1984-07-28 | 1984-07-28 | dome type speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6133595U (en) |
-
1984
- 1984-07-28 JP JP11571184U patent/JPS6133595U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6133595U (en) | 1986-02-28 |
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