JPS58107800A - Rectangular flat plate diaphragm - Google Patents

Rectangular flat plate diaphragm

Info

Publication number
JPS58107800A
JPS58107800A JP20855781A JP20855781A JPS58107800A JP S58107800 A JPS58107800 A JP S58107800A JP 20855781 A JP20855781 A JP 20855781A JP 20855781 A JP20855781 A JP 20855781A JP S58107800 A JPS58107800 A JP S58107800A
Authority
JP
Japan
Prior art keywords
diaphragm
rectangular flat
flat plate
core material
forming
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.)
Granted
Application number
JP20855781A
Other languages
Japanese (ja)
Other versions
JPH0324120B2 (en
Inventor
Hideaki Inoue
秀明 井上
Kazuhide Sato
和栄 佐藤
Shuji Saeki
周二 佐伯
Seiichi Ishikawa
石川 清一
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP20855781A priority Critical patent/JPS58107800A/en
Publication of JPS58107800A publication Critical patent/JPS58107800A/en
Publication of JPH0324120B2 publication Critical patent/JPH0324120B2/ja
Granted legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00Diaphragms for electromechanical transducers; Cones
    • H04R7/02Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04Plane diaphragms
    • H04R7/06Plane diaphragms comprising a plurality of sections or layers
    • H04R7/10Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact

Landscapes

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

Abstract

PURPOSE:To improve the efficiency and the high frequency reproduction frequency characteristics, by forming a core of a diaphragm into a construction having radial rugged grooves and providing a surface member on both sides. CONSTITUTION:The core member 4 of a rectangular flat diaphragm is formed into a construction of a thermoplastic resin film having radial rugged grooves 4, 4' by press forming, vacuum forming or pressure forming. After the forming, a surface member 5 made of a light metal foil or high polymer film having a comparatively high elasticity is sticked on both sides of the core member 4. Thus, the longitudinal and laterla strength of the diaphragm itself is improved and the sound pressure frequency characteristics flat up to high frequencies can be obtained, and since the shape of the core member is not appeared on the surface of the surface member at the bonding between the core member and the surface member, the productivity is increased to attain the diaphragm plate suitable for mass-production.

Description

【発明の詳細な説明】 本発明はスピーカ用の矩形平板振動板に関するものであ
り、その目的とするところは生産性に富み、かつ高域ま
で平坦な音圧周波数特性を得ることができる矩形平板振
動板を提供することにある。
Detailed Description of the Invention The present invention relates to a rectangular flat plate diaphragm for speakers, and its purpose is to provide a rectangular flat plate that is highly productive and capable of obtaining flat sound pressure frequency characteristics up to high frequencies. Our goal is to provide a diaphragm.

一般に、スピーカ用振動板はほとんどが紙パルプを抄造
成形した様なものであり、振動板形状はコーン形のもの
であった。しかし、これら撮動板を用いたスピーカの場
合、撮動板の内周部と外周部とでは音源の位置がずれる
ため、音圧周波数特性が平坦なものを得られにくいとい
った欠点を有していた。
In general, most speaker diaphragms are made of paper pulp, and the diaphragm has a cone shape. However, speakers using these imaging plates have the disadvantage that it is difficult to obtain flat sound pressure frequency characteristics because the sound source position is shifted between the inner and outer peripheries of the imaging plate. Ta.

そこで、上記スピーカに対し、最近では振動板を平面と
し音源の位置をそろえた平板スピーカが音圧周波数特性
の平坦化という面から開発され、さらに、テレビジョン
受像機、ラジオ受信機、カセットテープレコーダといっ
たスピーカの取り付は面積の限られfclL′を機器に
おいて限られたスペースを有効利用し、振動面積の拡大
化を図るため、矩形平板スピーカが開発されはじめた。
Therefore, in contrast to the above-mentioned speakers, flat-plate speakers, in which the diaphragm is flat and the sound sources are aligned, have recently been developed from the perspective of flattening the sound pressure frequency characteristics. Since the mounting area for such speakers is limited, rectangular flat speakers have begun to be developed in order to make effective use of the limited space in equipment and expand the vibration area.

これら平板振動板の場合、ただ単に振動板形状を平板に
しただけでは曲げに対する剛性が小さく分割振動が起こ
りやすく、広帯域にわたり平坦な音圧周波数特性を得る
ことは不可能である。これら問題を解1決する手段とし
て、第1図に示すように心材1に発泡スチロール及びプ
ラスチック発泡体を用い。
In the case of these flat diaphragms, if the diaphragm is simply made into a flat diaphragm, the rigidity against bending is low and split vibration is likely to occur, making it impossible to obtain flat sound pressure frequency characteristics over a wide band. As a means to solve these problems, polystyrene foam and plastic foam were used as the core material 1, as shown in FIG.

さらに上記心材1両面にアルミニウム箔等の表面材2を
接着した矩形平板振動板が用いられている。
Furthermore, a rectangular flat plate diaphragm is used in which surface material 2 such as aluminum foil is adhered to both surfaces of the core material 1.

しかしながら、心材1自体に発泡体を用いた振動板の場
合、コストが比較的安く、生産性が良いといった利点を
有しているが、振動板自体の重量が重くなる問題がある
。特に、小形平板振動板の場合、心材の厚みを薄くする
心安があり1発泡体を熱線等により切断しなければなら
ない。そうした場合、切断時に発泡体の切断面が熱によ
り収縮し。
However, in the case of a diaphragm using a foam as the core material 1 itself, although it has the advantage of being relatively low in cost and having good productivity, there is a problem in that the diaphragm itself is heavy. Particularly, in the case of a small flat diaphragm, the thickness of the core material must be reduced, and the foam must be cut using a hot wire or the like. In such a case, the cut surface of the foam will shrink due to heat during cutting.

発泡倍率が低下したのと同じとなって、重量が重くなり
、能率が低下するといった欠点を有していた。そこで、
第2図に示す様、高い曲げ剛性が得られる従来のアルミ
・・ニカム構造体を心材3とした平板振動板を利用する
ことが考えられるが、これら振動板は加工工程が複雑で
あるため、製造コストが高くつぐといった欠点があるほ
か、心材と表面材との接着の際に1表面材の箔厚を下げ
て重量の軽減化を図ろうとした場合、熱プレスiにより
接着を行ら関係でコア形状内に密閉された凹凸を生じ、
そのため、そのコアの形状が表面材の接着後に空気の収
縮によって表面材上に出てしまい。
This resulted in a decrease in foaming ratio, an increase in weight, and a decrease in efficiency. Therefore,
As shown in Figure 2, it is conceivable to use a flat diaphragm whose core material is a conventional aluminum nicum structure that provides high bending rigidity, but since the processing process for these diaphragms is complicated, In addition to the disadvantages of high production costs, when attempting to reduce weight by reducing the foil thickness of one surface material when bonding the core material and surface material, it is difficult to bond by heat press i. Creates sealed irregularities within the core shape,
As a result, the shape of the core is exposed on the surface material due to air contraction after the surface material is bonded.

心材の形状が表面材の表面に出てしまうといった欠点を
有していた。
This had the disadvantage that the shape of the core material was visible on the surface of the surface material.

本発明はこのような従来矩形平板振動板の問題を解消す
るものであり、矩形平板振動板の心材の形状を放射状に
凹凸を設けた形状としたものである。
The present invention solves the problems of the conventional rectangular flat diaphragm, and the core of the rectangular flat diaphragm has a radially uneven shape.

かかる構成によれば矩形平板振動板自体の縦方向及び横
方向の強度を向上させ、高域まで平坦な音圧周波数特性
を得ることが可能となるほか、さらに心材と表面材との
接着の際に、心材の形状が表面材の表面に出ないため、
生産性が向上し、量産化に適した矩形平板振動板を提供
することかできる。すなわち、心材と表面材を熱プレス
等により接着する場合、心材の形状内に密閉された凹凸
かないため、その凹凸の形状が表面材の接着後に空気の
収縮によって表面材上にあられれるようなことがなくな
り、生産性を高めることができる。      j以下
に本発明の矩形平板振動板について図面をもって説明す
る。
With this configuration, it is possible to improve the longitudinal and lateral strength of the rectangular flat plate diaphragm itself, and obtain flat sound pressure frequency characteristics up to high frequencies. In addition, since the shape of the heartwood does not appear on the surface of the surface material,
It is possible to improve productivity and provide a rectangular flat diaphragm suitable for mass production. In other words, when bonding the core material and the surface material by heat pressing, etc., there is no sealed unevenness within the shape of the core material, so the shape of the unevenness may be formed on the surface material by air contraction after the surface material is bonded. can be eliminated and productivity can be increased. j Below, the rectangular flat plate diaphragm of the present invention will be explained with reference to the drawings.

第3図は本μ明の矩形平板振動板の一実施例を示してお
り、第3図において、心材4は第4図に示すようにプレ
ス成形、真空成形、圧空成形等の手段を用いて熱可塑性
樹脂フィルムを放射状に凹凸形状4’、 4’を有した
構造に成形した平板状のものであり、第6図は上記心材
形状をイの方向から見た場合の、斜視図である。
Fig. 3 shows an embodiment of the rectangular flat plate diaphragm of the present invention, and in Fig. 3, the core material 4 is formed by press forming, vacuum forming, pressure forming, etc. as shown in Fig. 4. It is a flat plate-like structure in which a thermoplastic resin film is molded into a structure having radially uneven shapes 4', 4', and FIG. 6 is a perspective view of the core shape as seen from the direction A.

このように心材4を成形により作成した後、第3図に示
す様に放射状に凹凸をなした心材4の両面に比較的高弾
性を有する軽金属箔又は高分子フィルム等よりなる表面
材6を貼り付けである。
After the core material 4 is formed by molding in this way, a surface material 6 made of a light metal foil or polymer film having relatively high elasticity is pasted on both sides of the core material 4, which has radially uneven surfaces, as shown in FIG. It is attached.

このように構成した矩形平板振動板は、フィルムを成形
した心材40両面に熱プレス等により表面材6を接着す
るといった工程で作成できることから、生産性が良くコ
ストが比較的安くつくといった利点を有している。そし
て、心材4内の凹凸形状の溝は中心部から放射状に伸び
て全て外部に慣通されているため、表面材5の接着時に
心材4の形状が表面材6の表面に出にくいといった利点
を有しており、これにより、表面材6の箔厚を薄くし、
重量の低減化を図ることが可能となる。また、特性面に
おいても、第6図a、  bに示すように縦方向の曲げ
強度口と、横方向の曲げ強度ハとを同程度とし、なおか
つ、強度を従来のハニカム形状と同等程度とすることが
できることによって、第9図に示すように、能率が良く
、高域再生周波数特性を向上させることができる。第9
図中1曲線二は本実施例の矩形平板振動板を用いたスピ
ーカの音圧周波数特性、曲線ホは高分子発泡体を心材と
する従来の矩形平板振動板を用いたスピーカの音圧周波
数特性である。
The rectangular flat plate diaphragm constructed in this manner can be manufactured by a process of adhering the surface material 6 to both sides of the core material 40 formed from a film by heat pressing, etc., so it has the advantage of high productivity and relatively low cost. are doing. Since the uneven grooves in the core material 4 extend radially from the center and are all passed through to the outside, there is an advantage that the shape of the core material 4 does not easily come out on the surface of the surface material 6 when the surface material 5 is bonded. This reduces the foil thickness of the surface material 6,
It becomes possible to reduce the weight. In addition, in terms of characteristics, as shown in Figure 6 a and b, the vertical bending strength and the lateral bending strength are the same, and the strength is the same as that of the conventional honeycomb shape. By being able to do this, as shown in FIG. 9, it is possible to improve efficiency and high frequency reproduction characteristics. 9th
In the figure, curve 1, curve 2, is the sound pressure frequency characteristic of the speaker using the rectangular flat plate diaphragm of this embodiment, and curve E is the sound pressure frequency characteristic of the speaker, using the conventional rectangular flat plate diaphragm whose core material is polymer foam. It is.

尚、第9図に示す音圧周波数特性は第7図および第8図
に示すようなスピーカを試作し評価したものである。
Incidentally, the sound pressure frequency characteristics shown in FIG. 9 were evaluated by making prototype speakers as shown in FIGS. 7 and 8.

第7図および第8図において、6は矩形平板振動板であ
り、この外周をエツジ部材7を介してフレーム8に支持
しである。そして、第8図に示すようにフレーム8にマ
クネット9.ヨーク10.センタボール11より成る磁
気回路を取υ付け、フレーム8にダンパー12によシ支
持されたボイスコイルボビン13を矩形平面振動板6に
生じる節の位置に直接接着しである。
In FIGS. 7 and 8, reference numeral 6 denotes a rectangular flat plate diaphragm, the outer periphery of which is supported by a frame 8 via an edge member 7. Then, as shown in FIG. 8, Macnet 9. York 10. A magnetic circuit consisting of a center ball 11 is attached, and a voice coil bobbin 13 supported by a damper 12 is directly bonded to the frame 8 at the position of a node formed on the rectangular plane diaphragm 6.

第10図および第11図は本発明の矩形平板振動板の他
の実施例を示しており、心材14は熱可塑性樹脂フィル
ムを放射状に凹凸形状14’、 14’を有した構造に
成形した平板状のものであり、第1の実施例のものと異
なるところはボイスコイルボビン接着位置(駆動位置、
I動板共振周波数によって生じる節の位置)に放射状凹
凸形状の中心点がくる様に成形したことである。この心
材14を用、いても能率の向上及び再生帯域の拡大とい
うと同様の効果が期待できる0さらに、駆動位置上に心
材の強度の最大部分を持って来たことにより。
10 and 11 show other embodiments of the rectangular flat plate diaphragm of the present invention, in which the core material 14 is a flat plate formed from a thermoplastic resin film into a structure having radially uneven shapes 14', 14'. The difference from the first embodiment is the voice coil bobbin bonding position (drive position,
This is because the center point of the radial uneven shape is located at the position of the node caused by the I-moving plate resonance frequency. Even if this core material 14 is used, similar effects such as improved efficiency and expansion of the reproduction band can be expected.Furthermore, by bringing the maximum strength of the core material above the drive position.

信頼性(耐入力)の向上が期待できるものである。It is expected that reliability (input resistance) will be improved.

以上のように本発明によれば、心材の形状を放射状に凹
凸の溝を用けた構造に成形して両面に表面材を設けたの
で、能率が良く、高域再生周波数特性を向上させること
ができる利点を有するものである。
As described above, according to the present invention, the core material is formed into a structure using radially uneven grooves and the surface material is provided on both sides, so efficiency is high and high frequency reproduction characteristics can be improved. It has the advantage of being able to

【図面の簡単な説明】[Brief explanation of the drawing]

第1図、第2図は従来の矩形平板振動板の斜視図、第3
図は本発明の矩形平板振動板の一実施例を示す斜視図、
第4図は同振動板を構成する心材の上面図、第6図は同
振動板を構成する心材の斜視図、第6図は同振動板の曲
げ強度の説明図、第7図は試作スピーカ(節駆動方式)
の上面図、第8図は同スピーカの断面図、第9図は同振
動板を用いて試作したスピーカの音圧周波数特性と従来
スピーカの音圧周波数特性の比較曲線図、第10図は本
発明の矩形平板振動板の他の実施例に用いるる心材の上
面図、第11図は同振動板の側面図である。 4.14・・・・・・心材% 4’、 4’、  14
’、  14’・・・・凹凸形状溝、6・・・・・表面
材、6・・・・−・矩形平板振動板、7・・・・・エツ
ジ部材、8・・・・・・フレーム、9・・−・中・マグ
ネット、1o・−・・・・ヨーク、11・・・・・セン
ターポール、12・・・・・・ダンバー、13f・ ―・・・・・ボイスコイルボビン。 代理人の氏名 弁理士 中 尾 敏 男 ほか1名第1
図 第2図 第4図 第5図 第6図 ハ 第7図 第8図 第10図 第115!J
Figures 1 and 2 are perspective views of a conventional rectangular flat diaphragm;
The figure is a perspective view showing an embodiment of the rectangular flat plate diaphragm of the present invention.
Figure 4 is a top view of the core material that makes up the diaphragm, Figure 6 is a perspective view of the core material that makes up the diaphragm, Figure 6 is an explanatory diagram of the bending strength of the diaphragm, and Figure 7 is a prototype speaker. (Node drive method)
The top view, Figure 8 is a sectional view of the same speaker, Figure 9 is a comparison curve diagram of the sound pressure frequency characteristics of a prototype speaker using the same diaphragm and that of a conventional speaker, and Figure 10 is a comparison curve of the sound pressure frequency characteristics of a prototype speaker using the same diaphragm. A top view of the core material used in another embodiment of the rectangular flat diaphragm of the invention, and FIG. 11 is a side view of the same diaphragm. 4.14...Heartwood% 4', 4', 14
', 14'... Concave and convex groove, 6... Surface material, 6... Rectangular flat plate diaphragm, 7... Edge member, 8... Frame , 9...Middle magnet, 1o...Yoke, 11...Center pole, 12...Dunbar, 13f...Voice coil bobbin. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 10 Figure 115! J

Claims (1)

【特許請求の範囲】 1 熱可塑性樹脂フィルムをプレス成形等により縦方向
及び横方向の強度を同時に向上させるようr(、放射線
状に凹凸を設けた平板状に成形して心材とし、この心材
の両面に比較的高弾性を有する軽金媚箔及び高分子フィ
ルム等よりなる表面材を貼り付けてなる矩形平板振動板
。 2 心材の放射状凹凸形状の中心点を振動板自体の共撮
周波数によって生じる節の位置に相当するボイスコイル
駆動位置に設けた事を特徴とする特4゛請求の範囲第1
項記載の矩形平板振動板。
[Scope of Claims] 1. A thermoplastic resin film is formed into a core material by press molding or the like to simultaneously improve the strength in the longitudinal and lateral directions. A rectangular flat plate diaphragm made by pasting surface materials such as light metal foil and polymer film with relatively high elasticity on both sides. 2. The center point of the radially uneven shape of the core material is generated by the co-optation frequency of the diaphragm itself. Claim 1: Feature 4, characterized in that the voice coil is provided at a voice coil drive position corresponding to the position of the node.
Rectangular flat plate diaphragm as described in section.
JP20855781A 1981-12-22 1981-12-22 Rectangular flat plate diaphragm Granted JPS58107800A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20855781A JPS58107800A (en) 1981-12-22 1981-12-22 Rectangular flat plate diaphragm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20855781A JPS58107800A (en) 1981-12-22 1981-12-22 Rectangular flat plate diaphragm

Publications (2)

Publication Number Publication Date
JPS58107800A true JPS58107800A (en) 1983-06-27
JPH0324120B2 JPH0324120B2 (en) 1991-04-02

Family

ID=16558150

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20855781A Granted JPS58107800A (en) 1981-12-22 1981-12-22 Rectangular flat plate diaphragm

Country Status (1)

Country Link
JP (1) JPS58107800A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60177797A (en) * 1984-02-23 1985-09-11 Matsushita Electric Ind Co Ltd Diaphragm for speaker
US9332352B2 (en) 2013-02-25 2016-05-03 Apple Inc. Audio speaker with sandwich-structured composite diaphragm

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS488270U (en) * 1971-06-10 1973-01-30
JPS5690695A (en) * 1979-12-24 1981-07-22 Victor Co Of Japan Ltd Speaker diaphragm and its manufacture

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS488270U (en) * 1971-06-10 1973-01-30
JPS5690695A (en) * 1979-12-24 1981-07-22 Victor Co Of Japan Ltd Speaker diaphragm and its manufacture

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60177797A (en) * 1984-02-23 1985-09-11 Matsushita Electric Ind Co Ltd Diaphragm for speaker
US9332352B2 (en) 2013-02-25 2016-05-03 Apple Inc. Audio speaker with sandwich-structured composite diaphragm

Also Published As

Publication number Publication date
JPH0324120B2 (en) 1991-04-02

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