JPWO2019008638A1 - Diaphragm for speaker and speaker - Google Patents

Diaphragm for speaker and speaker Download PDF

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JPWO2019008638A1
JPWO2019008638A1 JP2019528205A JP2019528205A JPWO2019008638A1 JP WO2019008638 A1 JPWO2019008638 A1 JP WO2019008638A1 JP 2019528205 A JP2019528205 A JP 2019528205A JP 2019528205 A JP2019528205 A JP 2019528205A JP WO2019008638 A1 JPWO2019008638 A1 JP WO2019008638A1
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diaphragm
sound quality
peripheral end
adjusting member
quality adjusting
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JP6758502B2 (en
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隆亮 須田
誠浩 近藤
雄也 江崎
康治 田中
剛 仲田
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/14—Non-planar diaphragms or cones corrugated, pleated or ribbed

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

振動板（１１）には内周端部（１００ａ）から外周端部（１００ｂ）まで連続して音質調整部材（１０１）が設けられており、エッジ（１２）が貼られる外周端部（１００ｂ）においては、音質調整部材（１０１）が振動板本体（１００）の表面に設けられている。The diaphragm (11) is provided with a sound quality adjusting member (101) continuously from the inner peripheral end (100a) to the outer peripheral end (100b), and the outer peripheral end (100b) to which the edge (12) is attached. The sound quality adjusting member (101) is provided on the surface of the diaphragm main body (100).

Description

この発明は、空気を振動させて音波を放射するスピーカ用の振動板、及び、当該振動板を備えるスピーカに関するものである。   The present invention relates to a speaker diaphragm that vibrates air and emits sound waves, and a speaker including the diaphragm.

スピーカの音圧周波数特性を改善するために、振動板の剛性を高くすることが従来行われている。例えば特許文献１には、音圧周波数特性を改善するために、振動板本体の裏面に音質調整部材が一体成形されたスピーカ用の振動板が記載されている。特許文献１では、音質調整部材の一方の端部は、振動板本体の外周端部上に位置している。   In order to improve the sound pressure frequency characteristics of the speaker, it has been conventionally performed to increase the rigidity of the diaphragm. For example, Patent Document 1 describes a speaker diaphragm in which a sound quality adjusting member is integrally formed on the back surface of a diaphragm main body in order to improve sound pressure frequency characteristics. In Patent Document 1, one end portion of the sound quality adjusting member is located on the outer peripheral end portion of the diaphragm main body.

特開２０１５―８２７５４号公報JP 2015-82754 A

上記特許文献１では、振動板の表面にエッジが貼られている。しかしながらこの場合、振動板の裏面にエッジが貼られる場合と比べると、表面側において振動板から見たときのエッジの高さが高くなる。エッジは、振動板から放射された音波を反射するなど、振動板による音波の放射に干渉する。その干渉は、表面側において振動板から見たときのエッジの高さが高くなるほど、大きくなる。また、振動板の表面にエッジが貼られると、表面側での振動板の面積が見かけ上は減ることになり、音質に影響が出る。したがって、エッジは、振動板の表面ではなく裏面に貼られる方が好ましい。また、音圧周波数特性の改善のための音質調整部材は、その長さが長いほど改善効果が高くなり、好ましい。
しかしながら、上記特許文献１のように裏面において振動板本体の外周端部にまで音質調整部材を設けた場合、振動板の裏面にエッジを貼ろうとしても音質調整部材に干渉してしまうので、エッジを貼ることができない。In Patent Document 1, an edge is pasted on the surface of the diaphragm. However, in this case, the height of the edge when viewed from the diaphragm on the front surface side is higher than when the edge is pasted on the back surface of the diaphragm. The edge interferes with the sound wave emitted by the diaphragm, such as reflecting the sound wave emitted from the diaphragm. The interference increases as the height of the edge when viewed from the diaphragm on the surface side increases. Further, when an edge is pasted on the surface of the diaphragm, the area of the diaphragm on the surface side is apparently reduced, which affects sound quality. Therefore, it is preferable that the edge is attached to the back surface rather than the front surface of the diaphragm. Further, the sound quality adjusting member for improving the sound pressure frequency characteristic is preferable because the improvement effect is higher as the length is longer.
However, when the sound quality adjusting member is provided up to the outer peripheral end of the diaphragm main body on the back surface as in Patent Document 1, even if an edge is pasted on the back surface of the diaphragm, it interferes with the sound quality adjusting member. Can not be pasted.

この発明は、上記のような課題を解決するためになされたもので、振動板の裏面に貼られるエッジに干渉することなく、音圧周波数特性を改善できるスピーカ用の振動板を得ることを目的とする。   The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a speaker diaphragm that can improve sound pressure frequency characteristics without interfering with an edge pasted on the rear surface of the diaphragm. And

この発明に係るスピーカ用の振動板は、内周端部から当該内周端部よりも大径の外周端部まで傾斜して伸びる振動板本体と、振動板本体から立ち上がり、内周端部から外周端部まで連続して設けられた音質調整部材とを備え、音質調整部材は、外周端部において振動板本体の表面に設けられていることを特徴とするものである。   A speaker diaphragm according to the present invention includes a diaphragm body extending from an inner peripheral end portion to an outer peripheral end portion having a larger diameter than the inner peripheral end portion, a rising from the diaphragm main body, and an inner peripheral end portion. And a sound quality adjusting member provided continuously to the outer peripheral end portion, and the sound quality adjusting member is provided on the surface of the diaphragm main body at the outer peripheral end portion.

この発明によれば、音質調整部材は、振動板本体の内周端部から外周端部まで連続して設けられるとともに、外周端部において振動板本体の表面に設けられるので、振動板の裏面に貼られるエッジに干渉することなく、音圧周波数特性を改善することができる。   According to the present invention, the sound quality adjusting member is continuously provided from the inner peripheral end portion to the outer peripheral end portion of the diaphragm main body, and is provided on the surface of the diaphragm main body at the outer peripheral end portion. Sound pressure frequency characteristics can be improved without interfering with the edges to be applied.

実施の形態１に係るスピーカの断面図である。3 is a cross-sectional view of the speaker according to Embodiment 1. FIG. 図２Ａは、実施の形態１に係る振動板を表面側から見た際の斜視図であり、図２Ｂは、実施の形態１に係る振動板を裏面側から見た際の斜視図である。2A is a perspective view when the diaphragm according to Embodiment 1 is viewed from the front surface side, and FIG. 2B is a perspective view when the diaphragm according to Embodiment 1 is viewed from the back surface side. 実施の形態１に係る振動板を用いた場合の音圧周波数特性を示すグラフである。4 is a graph showing sound pressure frequency characteristics when the diaphragm according to Embodiment 1 is used. 図４Ａは、第１参考例の振動板の断面を示す図、図４Ｂは、当該振動板を用いた場合の音圧周波数特性を示すグラフである。FIG. 4A is a diagram illustrating a cross section of the diaphragm of the first reference example, and FIG. 4B is a graph illustrating sound pressure frequency characteristics when the diaphragm is used. 図５Ａは、第２参考例の振動板の断面を示す図、図５Ｂは、当該振動板を用いた場合の音圧周波数特性を示すグラフである。FIG. 5A is a diagram showing a cross section of the diaphragm of the second reference example, and FIG. 5B is a graph showing sound pressure frequency characteristics when the diaphragm is used. 図６Ａは、第３参考例の振動板の断面を示す図、図６Ｂは、当該振動板を用いた場合の音圧周波数特性を示すグラフである。FIG. 6A is a diagram illustrating a cross section of the diaphragm of the third reference example, and FIG. 6B is a graph illustrating sound pressure frequency characteristics when the diaphragm is used. 図７Ａは、第４参考例の振動板の断面を示す図、図７Ｂは、当該振動板を用いた場合の音圧周波数特性を示すグラフである。FIG. 7A is a diagram showing a cross section of the diaphragm of the fourth reference example, and FIG. 7B is a graph showing the sound pressure frequency characteristics when the diaphragm is used. 図８Ａは、実施の形態１に係る振動板の変形例を示す断面図、図８Ｂは、当該変形例を用いた場合の音圧周波数特性を示すグラフである。FIG. 8A is a cross-sectional view showing a modification of the diaphragm according to Embodiment 1, and FIG. 8B is a graph showing sound pressure frequency characteristics when the modification is used. 図９Ａは、平面視で音質調整部材が沿う線分を示す図であり、図９Ｂは、変形例として平面視で音質調整部材が沿う曲線を示す図である。FIG. 9A is a diagram showing a line segment along which the sound quality adjusting member is seen in a plan view, and FIG. 9B is a diagram showing a curve along which the sound quality adjusting member is seen in a plan view as a modification. 図２Ａ中のＢ−Ｂ線に沿って切断した音質調整部材の断面を示す図である。It is a figure which shows the cross section of the sound quality adjustment member cut | disconnected along the BB line in FIG. 2A. 図１１Ａ及び図１１Ｂは、振動板から見たときのエッジの高さについて示す図である。11A and 11B are diagrams showing the height of the edge when viewed from the diaphragm.

以下、この発明をより詳細に説明するために、この発明を実施するための形態について、添付の図面に従って説明する。
実施の形態１．
図１は、実施の形態１に係るスピーカ１の断面図である。
スピーカ１は、略コーン形状の振動板１１を有している。振動板１１の詳細については、図２Ａ及び図２Ｂを用いて後述する。振動板１１の外周には、図１中のＡ方向から見た際の平面視が円環状となるエッジ１２が設けられている。エッジ１２の内周端部１２ａは、振動板１１の裏面に貼り付けられている。内周端部１２ａを振動板１１の裏面に貼ることで、振動板１１の表面に貼る場合よりも振動板１１から見たときのエッジ１２の高さｈを抑えることができるので、音波の放射への干渉を抑えることができる。高さｈについては、エッジ１２の内周端部１２ａが仮に振動板１１の表面に貼り付けられたとした場合のものを図１１Ａに示し、図１に示す実施の形態１に係るスピーカ１のようにエッジ１２の内周端部１２ａが振動板１１の裏面に貼り付けられた場合のものを図１１Ｂに示している。
エッジ１２の外周端部１２ｂは、フレーム１４に固定されている。なお、振動板１１においては、スピーカ１の外部に向けられている面が表面となり、当該表面の裏側の面であってフレーム１４及び後述のダンパ２１等に対向する面が裏面となる。振動板１１の中心部に形成された開口には、円筒形状のボビン１５が挿入されて固定されている。ボビン１５の外周面には、ボイスコイル１６が巻き付けられて固定されている。Hereinafter, in order to explain the present invention in more detail, modes for carrying out the present invention will be described with reference to the accompanying drawings.
Embodiment 1 FIG.
FIG. 1 is a cross-sectional view of the speaker 1 according to the first embodiment.
The speaker 1 has a substantially cone-shaped diaphragm 11. Details of the diaphragm 11 will be described later with reference to FIGS. 2A and 2B. An edge 12 is provided on the outer periphery of the diaphragm 11 so that the planar view when viewed from the direction A in FIG. An inner peripheral end 12 a of the edge 12 is attached to the back surface of the diaphragm 11. Since the inner peripheral end 12a is pasted on the back surface of the diaphragm 11, the height h of the edge 12 when viewed from the diaphragm 11 can be suppressed as compared with the case of pasting on the surface of the diaphragm 11. Interference can be suppressed. As for the height h, a case where the inner peripheral end portion 12a of the edge 12 is temporarily attached to the surface of the diaphragm 11 is shown in FIG. 11A, like the speaker 1 according to the first embodiment shown in FIG. FIG. 11B shows a case where the inner peripheral end 12a of the edge 12 is attached to the back surface of the diaphragm 11.
An outer peripheral end 12 b of the edge 12 is fixed to the frame 14. In the diaphragm 11, the surface facing the outside of the speaker 1 is the front surface, and the surface on the back side of the front surface that faces the frame 14, a damper 21 described later, and the like is the back surface. A cylindrical bobbin 15 is inserted and fixed in the opening formed in the center of the diaphragm 11. A voice coil 16 is wound around and fixed to the outer peripheral surface of the bobbin 15.

ドーム形状のダストキャップ１７は、ボビン１５の一端部を覆うようにして振動板１１の表面に設けられている。ボビン１５の他端部は、ポールピース１８によって支持されている。ポールピース１８にはマグネット１９が固定され、また、当該マグネット１９をポールピース１８とで挟む位置にはヨーク２０が設けられている。フレーム１４は、ヨーク２０に固定され、スピーカ１の全体的な強度を保つ。
ボビン１５の外周面には、ダンパ２１の内周端部が固定されている。ダンパ２１の外周端部は、フレーム１４に固定されている。ダンパ２１は、図１中のＡ方向から見た際の平面視が円環状となる部材である。The dome-shaped dust cap 17 is provided on the surface of the diaphragm 11 so as to cover one end of the bobbin 15. The other end of the bobbin 15 is supported by a pole piece 18. A magnet 19 is fixed to the pole piece 18, and a yoke 20 is provided at a position where the magnet 19 is sandwiched between the pole piece 18. The frame 14 is fixed to the yoke 20 and maintains the overall strength of the speaker 1.
The inner peripheral end of the damper 21 is fixed to the outer peripheral surface of the bobbin 15. The outer peripheral end of the damper 21 is fixed to the frame 14. The damper 21 is a member having an annular shape when seen from the direction A in FIG.

図２Ａは、振動板１１を表面側から見た際の斜視図であり、図２Ｂは、振動板１１を裏面側から見た際の斜視図である。
振動板１１は、振動板本体１００と音質調整部材１０１とを有する。振動板本体１００は、内周端部１００ａから当該内周端部１００ａよりも大径の外周端部１００ｂまで傾斜して伸びる、略円錐面状の部材である。振動板本体１００は、図１のように切断した場合にその断面がカーブを描く形状となっており、実施の形態１では、当該カーブが内周端部１００ａ側で曲率半径６０ｍｍ、外周端部１００ｂ側で曲率半径２００ｍｍ、そしてスピーカ１の口径が１６ｃｍである場合を例に挙げて説明する。FIG. 2A is a perspective view when the diaphragm 11 is viewed from the front surface side, and FIG. 2B is a perspective view when the diaphragm 11 is viewed from the back surface side.
The diaphragm 11 includes a diaphragm main body 100 and a sound quality adjusting member 101. The diaphragm main body 100 is a substantially conical member that extends from the inner peripheral end portion 100a to the outer peripheral end portion 100b having a larger diameter than the inner peripheral end portion 100a. When the diaphragm body 100 is cut as shown in FIG. 1, the cross section has a curved shape. In the first embodiment, the curve has a radius of curvature of 60 mm on the inner peripheral end portion 100a side and an outer peripheral end portion. A case where the radius of curvature is 200 mm on the 100b side and the aperture of the speaker 1 is 16 cm will be described as an example.

音質調整部材１０１は、振動板本体１００から立ち上がるリブ状の部材である。図２Ａ及び図２Ｂから分かるように、音質調整部材１０１は、内周端部１００ａ及び外周端部１００ｂにおいて振動板本体１００の表面に設けられ、それ以外の部分は、振動板本体１００の裏面に設けられている。図１の断面に示されるように、音質調整部材１０１は、内周端部１００ａから外周端部１００ｂまで連続して設けられて、振動板本体１００を径方向に沿って横断している。つまり、図２Ａのように表面側から見た場合、音質調整部材１０１は途中で途切れているように見え、また、図２Ｂのように裏面側から見た場合、音質調整部材１０１は内周端部１００ａ及び外周端部１００ｂには設けられていないように見えるが、図１の断面に示されるように、音質調整部材１０１は、表面から裏面へ又は裏面から表面へと振動板本体１００を通過して、内周端部１００ａから外周端部１００ｂまで途切れることなく連続した部材となっている。   The sound quality adjustment member 101 is a rib-like member that rises from the diaphragm main body 100. 2A and 2B, the sound quality adjusting member 101 is provided on the front surface of the diaphragm main body 100 at the inner peripheral end portion 100a and the outer peripheral end portion 100b, and other portions are provided on the back surface of the diaphragm main body 100. Is provided. As shown in the cross section of FIG. 1, the sound quality adjusting member 101 is provided continuously from the inner peripheral end portion 100a to the outer peripheral end portion 100b, and traverses the diaphragm main body 100 along the radial direction. That is, when viewed from the front side as shown in FIG. 2A, the sound quality adjusting member 101 appears to be interrupted in the middle, and when viewed from the back side as shown in FIG. The sound quality adjustment member 101 passes through the diaphragm main body 100 from the front surface to the back surface or from the back surface to the front surface as shown in the cross section of FIG. And it is a continuous member without interruption from the inner peripheral end portion 100a to the outer peripheral end portion 100b.

振動板１１は、炭素繊維強化液晶ポリマー、環状オレフィン系樹脂又はカーボンナノチューブ等を含む樹脂材料の射出成形によって作られ、振動板本体１００と音質調整部材１０１とが一体成形される。
なお、図２Ａ及び図２Ｂでは、内周端部１００ａから外周端部１００ｂまで連続する音質調整部材１０１を計５個、つまり互いに７２度ずつ位置をずらしながら設けた場合を示したが、音質調整部材１０１の個数は図示例のものに限らず適宜増減させてよい。また、各音質調整部材１０１の配置間隔は、均等でなくてもよい。The diaphragm 11 is made by injection molding of a resin material containing carbon fiber reinforced liquid crystal polymer, cyclic olefin resin, carbon nanotube or the like, and the diaphragm main body 100 and the sound quality adjusting member 101 are integrally molded.
2A and 2B show a case where a total of five sound quality adjusting members 101 that are continuous from the inner peripheral end portion 100a to the outer peripheral end portion 100b are provided, that is, with their positions shifted by 72 degrees from each other. The number of members 101 is not limited to the illustrated example, and may be increased or decreased as appropriate. Further, the arrangement intervals of the sound quality adjusting members 101 may not be equal.

上記のように構成されたスピーカ１では、ボビン１５にボイスコイル１６が固定されているので、ボイスコイル１６に音声信号が入力されると、当該音声信号に応じてスピーカ１の中心軸Ｘに沿ってボイスコイル１６と共にボビン１５が振動する。振動板１１は、ボビン１５に固定されているので、ボビン１５の振動に伴い振動板１１も振動する。振動板１１が振動することで、振動板１１の周囲の空気が振動して、音波が放射される。
図３は、振動板１１を用いた場合の音圧周波数特性を示すグラフである。In the speaker 1 configured as described above, since the voice coil 16 is fixed to the bobbin 15, when an audio signal is input to the voice coil 16, along the central axis X of the speaker 1 according to the audio signal. As a result, the bobbin 15 vibrates together with the voice coil 16. Since the diaphragm 11 is fixed to the bobbin 15, the diaphragm 11 also vibrates with the vibration of the bobbin 15. When the diaphragm 11 vibrates, the air around the diaphragm 11 vibrates and a sound wave is emitted.
FIG. 3 is a graph showing the sound pressure frequency characteristics when the diaphragm 11 is used.

ここで、図４Ａ〜図７Ａに、実施の形態１に係る振動板１１の理解を助けるための参考例を示す。図４Ａ〜図７Ａでは、フレーム１４及びダンパ２１等を適宜不図示としている。
図４Ａは、第１参考例である振動板１１Ａの断面を示す図、図４Ｂは、振動板１１Ａを用いた場合の音圧周波数特性を示すグラフである。
振動板１１Ａは、振動板本体１００と、リブ状の音質調整部材１０１Ａとを有する。つまり、振動板１１と振動板１１Ａとは、音質調整部材の点で異なっている。Here, FIGS. 4A to 7A show a reference example for helping understanding of the diaphragm 11 according to the first embodiment. 4A to 7A, the frame 14, the damper 21 and the like are not illustrated as appropriate.
4A is a diagram illustrating a cross section of a diaphragm 11A as a first reference example, and FIG. 4B is a graph illustrating sound pressure frequency characteristics when the diaphragm 11A is used.
The diaphragm 11A includes a diaphragm main body 100 and a rib-like sound quality adjusting member 101A. That is, the diaphragm 11 and the diaphragm 11A are different in terms of a sound quality adjusting member.

音質調整部材１０１Ａは、全ての部分が振動板本体１００の裏面に設けられている。音質調整部材１０１Ａは、内周端部１００ａには設けられていない。つまり、音質調整部材１０１Ａは、内周端部１００ａから外周端部１００ｂまで連続して設けられてはいない。音質調整部材１０１Ａは、外周端部１００ｂにおいて振動板本体１００の裏面に設けられているので、エッジ１２は、音質調整部材１０１Ａとの干渉を避けるために、振動板１１Ａの表面に貼られる。   The sound quality adjusting member 101 </ b> A is all provided on the back surface of the diaphragm main body 100. The sound quality adjusting member 101A is not provided at the inner peripheral end portion 100a. That is, the sound quality adjusting member 101A is not continuously provided from the inner peripheral end portion 100a to the outer peripheral end portion 100b. Since the sound quality adjusting member 101A is provided on the back surface of the diaphragm main body 100 at the outer peripheral end portion 100b, the edge 12 is attached to the surface of the diaphragm 11A in order to avoid interference with the sound quality adjusting member 101A.

図４Ｂを図３と比較すると、図３に比べ図４Ｂでは７０００Ｈｚ付近でピークが強く出ていることが分かる。これは、音質調整部材１０１Ａが内周端部１００ａには設けられておらず、内周端部１００ａから外周端部１００ｂまで連続して設けられてはいないために、振動板１１に比べて振動板１１Ａでは、音圧周波数特性におけるピーク及びディップに大きく寄与する軸対称振動モードの発生を抑制できていないからである。なお、軸対称振動モードとは、振動板の中心軸を基準とした軸対称の振動モードのことである。   Comparing FIG. 4B with FIG. 3, it can be seen that the peak is stronger at around 7000 Hz in FIG. 4B than in FIG. 3. This is because the sound quality adjusting member 101A is not provided at the inner peripheral end portion 100a, and is not provided continuously from the inner peripheral end portion 100a to the outer peripheral end portion 100b. This is because the plate 11A cannot suppress the generation of the axially symmetric vibration mode that greatly contributes to the peak and dip in the sound pressure frequency characteristics. The axially symmetric vibration mode is an axially symmetric vibration mode with respect to the central axis of the diaphragm.

図５Ａは、第２参考例である振動板１１Ｂの断面を示す図、図５Ｂは、振動板１１Ｂを用いた場合の音圧周波数特性を示すグラフである。
振動板１１Ｂは、振動板本体１００と、リブ状の音質調整部材１０１Ｂとを有する。つまり、振動板１１，１１Ａと振動板１１Ｂとは、音質調整部材の点で異なっている。FIG. 5A is a diagram showing a cross section of a diaphragm 11B as a second reference example, and FIG. 5B is a graph showing sound pressure frequency characteristics when the diaphragm 11B is used.
The diaphragm 11B includes a diaphragm main body 100 and a rib-like sound quality adjusting member 101B. That is, the diaphragms 11 and 11A and the diaphragm 11B are different in terms of the sound quality adjusting member.

音質調整部材１０１Ｂは、全ての部分が振動板本体１００の裏面に設けられている。音質調整部材１０１Ｂは、内周端部１００ａ及び外周端部１００ｂには設けられていない。つまり、音質調整部材１０１Ｂは、内周端部１００ａから外周端部１００ｂまで連続して設けられてはいない。図４Ａに示す振動板１１Ａと異なり、外周端部１００ｂにおいて振動板本体１００の裏面に音質調整部材１０１Ｂが無いことから、エッジ１２は、振動板１１Ｂの裏面に貼れるようになっている。   The sound quality adjusting member 101 </ b> B is all provided on the back surface of the diaphragm main body 100. The sound quality adjusting member 101B is not provided at the inner peripheral end portion 100a and the outer peripheral end portion 100b. That is, the sound quality adjusting member 101B is not continuously provided from the inner peripheral end portion 100a to the outer peripheral end portion 100b. Unlike the diaphragm 11A shown in FIG. 4A, since the sound quality adjusting member 101B is not provided on the back surface of the diaphragm main body 100 at the outer peripheral end portion 100b, the edge 12 can be attached to the back surface of the diaphragm 11B.

図５Ｂを図４Ｂと比較すると、図４Ｂに比べ図５Ｂでは２０００〜３０００Ｈｚ付近でピークが強く出ていることが分かる。これは、外周端部１００ｂにおいて音質調整部材１０１Ｂが設けられていないため、その分、軸対称振動モードの発生を抑制できていないからである。   Comparing FIG. 5B with FIG. 4B, it can be seen that in FIG. This is because the sound quality adjusting member 101B is not provided at the outer peripheral end portion 100b, and accordingly, the generation of the axially symmetric vibration mode cannot be suppressed.

図６Ａは、第３参考例である振動板１１Ｃの断面を示す図、図６Ｂは、振動板１１Ｃを用いた場合の音圧周波数特性を示すグラフである。
振動板１１Ｃは、振動板本体１００と、リブ状の音質調整部材１０１Ｃとを有する。つまり、振動板１１，１１Ａ，１１Ｂと振動板１１Ｃとは、音質調整部材の点で異なっている。6A is a diagram illustrating a cross section of a diaphragm 11C as a third reference example, and FIG. 6B is a graph illustrating sound pressure frequency characteristics when the diaphragm 11C is used.
The diaphragm 11C includes a diaphragm main body 100 and a rib-like sound quality adjusting member 101C. That is, the diaphragms 11, 11A, 11B and the diaphragm 11C are different in terms of the sound quality adjusting member.

音質調整部材１０１Ｃは、全ての部分が振動板本体１００の裏面に設けられている。音質調整部材１０１Ｃは、内周端部１００ａから外周端部１００ｂまで連続して設けられている。音質調整部材１０１Ｃは、外周端部１００ｂにおいて振動板本体１００の裏面に設けられているので、エッジ１２は、音質調整部材１０１Ｃとの干渉を避けるために、振動板１１Ｃの表面に貼られる。   The sound quality adjusting member 101 </ b> C is all provided on the back surface of the diaphragm main body 100. The sound quality adjusting member 101C is continuously provided from the inner peripheral end portion 100a to the outer peripheral end portion 100b. Since the sound quality adjusting member 101C is provided on the back surface of the diaphragm main body 100 at the outer peripheral end portion 100b, the edge 12 is attached to the surface of the diaphragm 11C in order to avoid interference with the sound quality adjusting member 101C.

図６Ｂを図４Ｂと比較すると、図４Ｂに比べ図６Ｂでは７０００Ｈｚ付近でのピークが抑えられて、音圧周波数特性が改善されていることが分かる。図６Ｂに示される音圧周波数特性は、図３に示される音圧周波数特性と同程度のものとなっている。   Comparing FIG. 6B with FIG. 4B, it can be seen that the peak in the vicinity of 7000 Hz is suppressed in FIG. 6B compared to FIG. 4B, and the sound pressure frequency characteristics are improved. The sound pressure frequency characteristic shown in FIG. 6B is almost the same as the sound pressure frequency characteristic shown in FIG.

図７Ａは、第４参考例である振動板１１Ｄの断面を示す図、図７Ｂは、振動板１１Ｄを用いた場合の音圧周波数特性を示すグラフである。
振動板１１Ｄは、振動板本体１００と、リブ状の音質調整部材１０１Ｄとを有する。つまり、振動板１１，１１Ａ，１１Ｂ，１１Ｃと振動板１１Ｄとは、音質調整部材の点で異なっている。FIG. 7A is a diagram showing a cross section of a diaphragm 11D as a fourth reference example, and FIG. 7B is a graph showing sound pressure frequency characteristics when the diaphragm 11D is used.
The diaphragm 11D includes a diaphragm body 100 and a rib-like sound quality adjustment member 101D. That is, the diaphragms 11, 11A, 11B, 11C and the diaphragm 11D are different from each other in terms of a sound quality adjusting member.

音質調整部材１０１Ｄは、全ての部分が振動板本体１００の表面に設けられている。音質調整部材１０１Ｄは、内周端部１００ａから外周端部１００ｂまで連続して設けられている。図６Ａに示す振動板１１Ｃと異なり、外周端部１００ｂにおいて振動板本体１００の裏面に音質調整部材１０１Ｄが無いことから、エッジ１２は、振動板１１Ｄの裏面に貼れるようになっている。   The sound quality adjusting member 101 </ b> D is all provided on the surface of the diaphragm main body 100. The sound quality adjusting member 101D is continuously provided from the inner peripheral end portion 100a to the outer peripheral end portion 100b. Unlike the diaphragm 11C shown in FIG. 6A, since the sound quality adjusting member 101D is not provided on the back surface of the diaphragm main body 100 at the outer peripheral end portion 100b, the edge 12 can be attached to the back surface of the diaphragm 11D.

図７Ｂを図４Ｂと比較すると、図４Ｂに比べ図７Ｂでは７０００Ｈｚ付近でのピークが抑えられて、音圧周波数特性が改善されていることが分かる。図７Ｂに示される音圧周波数特性は、図３に示される音圧周波数特性と同程度のものとなっている。
なお、図７Ａに示す音質調整部材１０１Ｄは、ダストキャップ１７と音質調整部材１０１Ｄとが干渉し合わないような工夫が求められる。Comparing FIG. 7B with FIG. 4B, it can be seen that the peak in the vicinity of 7000 Hz is suppressed in FIG. 7B compared to FIG. 4B, and the sound pressure frequency characteristics are improved. The sound pressure frequency characteristic shown in FIG. 7B is almost the same as the sound pressure frequency characteristic shown in FIG.
Note that the sound quality adjustment member 101D shown in FIG. 7A is required to be devised so that the dust cap 17 and the sound quality adjustment member 101D do not interfere with each other.

以上のように、振動板本体１００に設ける音質調整部材は、できるだけ長く連続して設けられていると、音圧周波数特性の改善効果が高いことが分かる。つまり、振動板本体１００に設ける音質調整部材は、振動板本体１００の内周端部１００ａから外周端部１００ｂまで連続して設けられていると、音圧周波数特性の改善効果が高いことが分かる。また、その際、内周端部１００ａから外周端部１００ｂまで音質調整部材が連続して設けられていれば、図１，２Ａ，２Ｂに示す音質調整部材１０１のように途中で表面から裏面へ又は裏面から表面へと振動板本体１００を通過したとしても、図６Ａ，７Ａに示す音質調整部材１０１Ｃ，１０１Ｄと同程度の音圧周波数特性の改善効果を得られることが分かる。   As described above, when the sound quality adjusting member provided in the diaphragm main body 100 is provided continuously as long as possible, it can be seen that the effect of improving the sound pressure frequency characteristic is high. That is, when the sound quality adjusting member provided on the diaphragm main body 100 is continuously provided from the inner peripheral end portion 100a to the outer peripheral end portion 100b of the diaphragm main body 100, it can be seen that the effect of improving the sound pressure frequency characteristics is high. . At that time, if the sound quality adjusting member is continuously provided from the inner peripheral end portion 100a to the outer peripheral end portion 100b, the sound quality adjusting member 101 shown in FIGS. Or even if it passes the diaphragm main body 100 from the back surface to the front surface, it turns out that the improvement effect of the sound pressure frequency characteristic comparable as the sound quality adjustment members 101C and 101D shown to FIG.

なお、図１に示すように、音質調整部材１０１が内周端部１００ａにおいて振動板本体１００の表面に設けられていると、振動板１１の振幅が大きくても音質調整部材１０１とダンパ２１との接触を避けることができ、好ましい。しかしながら、考えられる振動板１１の最大振幅が、そもそもダンパ２１と接触しない程度の場合は、図８Ａのように内周端部１００ａにおいて音質調整部材１０１を裏面に設けてもよい。図８Ｂは、このときの音圧周波数特性を示すグラフである。図８Ａのような音質調整部材１０１であっても、振動板本体１００の内周端部１００ａから外周端部１００ｂまで連続して設けられていることに変わりないので、音圧周波数特性としては図３と同程度のものとなる。   As shown in FIG. 1, when the sound quality adjusting member 101 is provided on the surface of the diaphragm main body 100 at the inner peripheral end portion 100a, the sound quality adjusting member 101 and the damper 21 are arranged even if the amplitude of the diaphragm 11 is large. Can be avoided, which is preferable. However, if the maximum possible amplitude of the diaphragm 11 is such that it does not contact the damper 21 in the first place, the sound quality adjusting member 101 may be provided on the back surface at the inner peripheral end portion 100a as shown in FIG. 8A. FIG. 8B is a graph showing the sound pressure frequency characteristics at this time. Even if the sound quality adjusting member 101 as shown in FIG. 8A is provided continuously from the inner peripheral end portion 100a to the outer peripheral end portion 100b of the diaphragm main body 100, the sound pressure frequency characteristic is shown in FIG. The same as 3.

また、図２Ａ及び図２Ｂでは、音質調整部材１０１が、内周端部１００ａと外周端部１００ｂとをつなぐ線分に沿って設けられるようにした。当該線分は、図９Ａのように振動板１１の平面視で、図中の点線Ｌ１が該当する。しかしながら、図９Ｂのように振動板１１の平面視で、図中の点線Ｌ２のような曲線に沿って、音質調整部材１０１が設けられるようにしてもよい。要は、音質調整部材１０１は、内周端部１００ａと外周端部１００ｂとをつなぐ線に沿って連続して設けられていればよい。
また、音質調整部材１０１のうち振動板本体１００の表面に設けられている部分は、ユーザが触れて破損するなどの可能性はあるが、音圧周波数特性の改善という観点では、図１及び図８Ａに示す音質調整部材１０１のうち内周端部１００ａと外周端部１００ｂとの間の部分を、振動板本体１００の裏面に代えて適宜表面に設けるようにしてもよい。その際、ダストキャップ１７との干渉を避けるため、ダストキャップ１７が設けられる位置でのみ、音質調整部材１０１を振動板本体１００の裏面に設けるようにするとよい。2A and 2B, the sound quality adjusting member 101 is provided along a line connecting the inner peripheral end portion 100a and the outer peripheral end portion 100b. The line segment corresponds to the dotted line L1 in the drawing in a plan view of the diaphragm 11 as shown in FIG. 9A. However, the sound quality adjusting member 101 may be provided along a curved line such as a dotted line L2 in the drawing in a plan view of the diaphragm 11 as shown in FIG. 9B. In short, the sound quality adjusting member 101 only needs to be provided continuously along a line connecting the inner peripheral end portion 100a and the outer peripheral end portion 100b.
Further, the portion of the sound quality adjusting member 101 provided on the surface of the diaphragm main body 100 may be damaged when touched by the user. However, from the viewpoint of improving the sound pressure frequency characteristics, FIG. A portion between the inner peripheral end portion 100a and the outer peripheral end portion 100b of the sound quality adjusting member 101 shown in FIG. 8A may be appropriately provided on the surface instead of the back surface of the diaphragm main body 100. At this time, in order to avoid interference with the dust cap 17, the sound quality adjusting member 101 may be provided on the back surface of the diaphragm main body 100 only at a position where the dust cap 17 is provided.

また、音質調整部材１０１が振動板本体１００から立ち上がる高さは、音質調整部材１０１の全部分で一様でも、部分ごとに異なっていてもよい。立ち上がる高さが低すぎると、剛性の向上が期待できないので、音圧周波数特性の改善効果は小さくなるが、高すぎると、音質調整部材１０１の質量が増加して出力音圧が小さくなることが考えられる。
既に述べたように、振動板本体１００の表面にある音質調整部材１０１の部分は、スピーカ１の外部へ向けて凸となることから、ユーザが触れて破損するなどの可能性がある。また、音質調整部材１０１のような細長く狭い形状を射出成形により成形する場合、成形時のガス逃げ不良による充填不足、又は、樹脂詰まり等が発生するため、金型を入れ子構造にする必要がある。しかしながら、振動板本体１００の裏面の音質調整部材１０１の部分を成形する金型に加え、振動板本体１００の表面の音質調整部材１０１の部分を成形する金型も入れ子構造にするとなると、金型の構造が複雑化し、金型の製造が難しくなる。Further, the height at which the sound quality adjusting member 101 rises from the diaphragm main body 100 may be uniform for all parts of the sound quality adjusting member 101 or may be different for each part. If the rising height is too low, the improvement in rigidity cannot be expected, so the effect of improving the sound pressure frequency characteristics is reduced. However, if it is too high, the mass of the sound quality adjusting member 101 increases and the output sound pressure decreases. Conceivable.
As already described, since the portion of the sound quality adjustment member 101 on the surface of the diaphragm main body 100 is convex toward the outside of the speaker 1, there is a possibility that the user touches it and breaks it. In addition, when a narrow and narrow shape such as the sound quality adjusting member 101 is molded by injection molding, insufficient filling due to gas escape failure during molding or resin clogging occurs, so the mold must be nested. . However, in addition to the mold for forming the sound quality adjusting member 101 on the back surface of the diaphragm main body 100, the mold for forming the sound quality adjusting member 101 on the front surface of the diaphragm main body 100 also has a nested structure. This makes the structure complicated and makes it difficult to manufacture the mold.

したがって、振動板本体１００の表面の音質調整部材１０１の部分は、なるべく高さを抑えることが好ましい。なお、その際、単純に高さを低くするだけでなく、幅を厚くすることで、剛性の低下を抑え、高さを低くする前と同等の音圧周波数特性の改善効果を得ることができる。例えば、図１０に示す音質調整部材１０１の断面形状において、振動板本体１００と接する幅方向の長さＷが、振動板本体１００から立ち上がる高さ方向の長さＨに対して６０〜１００％程度となるようにする。図１０に示す断面は、図２Ａを参照すると、音質調整部材１０１のうち振動板本体１００の表面に設けられた部分を、当該部分の内周端部から外周端部へ向かう方向Ｃに対して垂直な面で切断した際のものであり、図２Ａ中のＢ−Ｂ線が切断線となる。   Therefore, it is preferable to suppress the height of the sound quality adjusting member 101 on the surface of the diaphragm main body 100 as much as possible. At that time, not only simply reducing the height but also increasing the width can suppress the decrease in rigidity and obtain the same sound pressure frequency characteristic improvement effect as before the height is lowered. . For example, in the cross-sectional shape of the sound quality adjustment member 101 shown in FIG. 10, the length W in the width direction in contact with the diaphragm main body 100 is about 60 to 100% with respect to the length H in the height direction rising from the diaphragm main body 100. To be. The cross section shown in FIG. 10 is referred to FIG. 2A, and the portion of the sound quality adjusting member 101 provided on the surface of the diaphragm main body 100 is set in the direction C from the inner peripheral end to the outer peripheral end of the portion. It is a thing at the time of cut | disconnecting by a perpendicular | vertical surface, and the BB line in FIG. 2A turns into a cutting line.

なお、幅を厚くすることにより、たとえ音質調整部材１０１の質量が増加したとしても、図１及び図８Ａのように音質調整部材１０１が、内周端部１００ａ及び外周端部１００ｂ以外では振動板本体１００の裏面にある場合、振動板本体１００の表面にある音質調整部材１０１の部分が音質調整部材１０１の全部分に占める割合は、断面積ベースで１０％程度なので、質量増加による出力音圧の低下はあまり生じない。   Even if the mass of the sound quality adjusting member 101 is increased by increasing the width, the sound quality adjusting member 101 is a diaphragm other than the inner peripheral end portion 100a and the outer peripheral end portion 100b as shown in FIGS. 1 and 8A. In the case of being on the back surface of the main body 100, the ratio of the sound quality adjusting member 101 on the surface of the diaphragm main body 100 to the total portion of the sound quality adjusting member 101 is about 10% on a cross-sectional area basis. There is not much decrease in the.

以上のように、この実施の形態１に係るスピーカ１によれば、振動板１１には内周端部１００ａから外周端部１００ｂまで連続して音質調整部材１０１が設けられており、エッジ１２が貼られる外周端部１００ｂにおいては、音質調整部材１０１が振動板本体１００の表面に設けられている。これにより、振動板１１の裏面に貼られるエッジ１２に干渉することなく、音圧周波数特性を改善することができる。   As described above, according to the speaker 1 according to the first embodiment, the sound quality adjusting member 101 is continuously provided on the diaphragm 11 from the inner peripheral end portion 100a to the outer peripheral end portion 100b, and the edge 12 is The sound quality adjusting member 101 is provided on the surface of the diaphragm main body 100 at the outer peripheral edge 100b to be pasted. Thereby, the sound pressure frequency characteristic can be improved without interfering with the edge 12 attached to the back surface of the diaphragm 11.

また、音質調整部材１０１は、内周端部１００ａにおいて振動板本体１００の表面に設けられていることとした。このようにすると、音質調整部材１０１がダンパ２１と接触する可能性を低減できる。   The sound quality adjusting member 101 is provided on the surface of the diaphragm main body 100 at the inner peripheral end portion 100a. If it does in this way, possibility that the sound quality adjustment member 101 will contact the damper 21 can be reduced.

また、音質調整部材１０１のうち振動板本体１００の表面に設けられた部分は、振動板本体１００と接する幅方向の長さＷが振動板本体１００から立ち上がる高さ方向の長さＨに対して６０〜１００％となることとした。このようにすると、音質調整部材１０１が破損しにくく、また、射出成形で用いる金型の製造も容易となる。   In addition, the portion of the sound quality adjusting member 101 provided on the surface of the diaphragm main body 100 has a length W in the width direction in contact with the diaphragm main body 100 with respect to a length H in the height direction in which the diaphragm main body 100 rises. 60 to 100%. If it does in this way, the sound quality adjustment member 101 will be hard to be damaged, and manufacture of the metal mold | die used by injection molding will also become easy.

なお、振動板１１の形状は、上記で例示したものに限らない。つまり、振動板１１の形状は、パラカーブド形状、ストレート形状又はパラボリック形状といった種々の形状であってよい。また、振動板１１の曲率及びスピーカ１の口径についても上記した数値に限らない。スピーカ１の口径が例えば１０ｃｍ又は１５ｃｍであっても上記と同様の効果が得られる。   Note that the shape of the diaphragm 11 is not limited to that exemplified above. That is, the shape of the diaphragm 11 may be various shapes such as a paracurved shape, a straight shape, or a parabolic shape. Further, the curvature of the diaphragm 11 and the aperture of the speaker 1 are not limited to the above numerical values. Even if the aperture of the speaker 1 is, for example, 10 cm or 15 cm, the same effect as described above can be obtained.

また、本願発明はその発明の範囲内において、実施の形態の任意の構成要素の変形、もしくは実施の形態の任意の構成要素の省略が可能である。   Further, in the present invention, any constituent element of the embodiment can be modified or any constituent element of the embodiment can be omitted within the scope of the invention.

以上のように、この発明に係るスピーカ用の振動板は、振動板の裏面に貼られるエッジに干渉することなく、音圧周波数特性を改善できるので、優れた音質を要求されるスピーカに対して用いるのに特に適している。   As described above, since the diaphragm for a speaker according to the present invention can improve the sound pressure frequency characteristics without interfering with the edge pasted on the back surface of the diaphragm, the speaker is required to have excellent sound quality. Particularly suitable for use.

１ スピーカ、１１，１１Ａ〜１１Ｄ 振動板、１２ エッジ、１２ａ 内周端部、１２ｂ 外周端部、１４ フレーム、１５ ボビン、１６ ボイスコイル、１７ ダストキャップ、１８ ポールピース、１９ マグネット、２０ ヨーク、２１ ダンパ、１００ 振動板本体、１００ａ 内周端部、１００ｂ 外周端部、１０１，１０１Ａ〜１０１Ｄ 音質調整部材。   DESCRIPTION OF SYMBOLS 1 Speaker, 11, 11A-11D Diaphragm, 12 edge, 12a Inner edge part, 12b Outer edge part, 14 Frame, 15 Bobbin, 16 Voice coil, 17 Dust cap, 18 Pole piece, 19 Magnet, 20 York, 21 Damper, 100 diaphragm main body, 100a inner peripheral end, 100b outer peripheral end, 101, 101A to 101D sound quality adjusting member.

Claims (4)

内周端部から当該内周端部よりも大径の外周端部まで傾斜して伸びる振動板本体と、
前記振動板本体から立ち上がり、前記内周端部から前記外周端部まで連続して設けられた音質調整部材とを備え、
前記音質調整部材は、前記外周端部において前記振動板本体の表面に設けられていることを特徴とするスピーカ用の振動板。A diaphragm main body extending from the inner peripheral end to the outer peripheral end having a larger diameter than the inner peripheral end,
A sound quality adjusting member provided from the diaphragm main body and continuously provided from the inner peripheral edge to the outer peripheral edge;
The speaker diaphragm according to claim 1, wherein the sound quality adjusting member is provided on a surface of the diaphragm main body at the outer peripheral end portion. 前記音質調整部材は、前記内周端部において前記振動板本体の表面に設けられていることを特徴とする請求項１記載のスピーカ用の振動板。   The speaker diaphragm according to claim 1, wherein the sound quality adjusting member is provided on a surface of the diaphragm main body at the inner peripheral end. 前記音質調整部材のうち前記振動板本体の表面に設けられた部分は、前記振動板本体と接する幅方向の長さが前記振動板本体から立ち上がる高さ方向の長さに対して６０〜１００％となることを特徴とする請求項１または請求項２記載のスピーカ用の振動板。   Of the sound quality adjusting member, the portion provided on the surface of the diaphragm main body has a length in the width direction in contact with the diaphragm main body of 60 to 100% of the length in the height direction rising from the diaphragm main body. The diaphragm for a speaker according to claim 1 or 2, wherein 請求項１記載のスピーカ用の振動板を備えることを特徴とするスピーカ。   A speaker comprising the diaphragm for a speaker according to claim 1.
JP2019528205A 2017-07-03 2017-07-03 Diaphragm for speaker and speaker Active JP6758502B2 (en)

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JPS531517A (en) * 1976-06-25 1978-01-09 Kenzou Inoue Dynamic speaker and method of producing same
JPS5548628Y2 (en) * 1976-09-21 1980-11-13
JPS5357022A (en) * 1976-11-02 1978-05-24 Kenzou Inoue Movable coil acoustic transducer vibrator plate
JPS5634297A (en) * 1979-08-29 1981-04-06 Kenzo Inoue Speaker unit
JP2014039147A (en) * 2012-08-16 2014-02-27 Yuji Kamijo Split vibration-loss fin-attached diaphragm for speaker

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