JPS63274296A - Flat speaker - Google Patents
Flat speakerInfo
- Publication number
- JPS63274296A JPS63274296A JP10828387A JP10828387A JPS63274296A JP S63274296 A JPS63274296 A JP S63274296A JP 10828387 A JP10828387 A JP 10828387A JP 10828387 A JP10828387 A JP 10828387A JP S63274296 A JPS63274296 A JP S63274296A
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- angle
- speaker
- outer circumference
- connotation
- 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.)
- Pending
Links
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 230000005855 radiation Effects 0.000 abstract description 6
- 238000009826 distribution Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 239000003415 peat Substances 0.000 abstract 1
- 239000000758 substrate Substances 0.000 abstract 1
- 230000005520 electrodynamics Effects 0.000 description 5
- 230000005284 excitation Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000002985 plastic film Substances 0.000 description 3
- 229920006255 plastic film Polymers 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Landscapes
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、偏平形スピーカにおける振動板の構成に関
するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a diaphragm in a flat speaker.
［従来の技術］
近年、エレクトロニクスのめざましい進歩発達に伴い、
電子機器等に用いられる回路部品には益々小形化が要求
されているが、音響変換器のうち、特にスピーカの構成
においてはその対応に遅れがあることを認めざるを得な
い。その主因は、Ｗ Ｊ的に広く採用されているコーン
形振動板の持フている宿命的な結果であると言っても差
支えない。[Conventional technology] In recent years, with the remarkable progress and development of electronics,
Although circuit components used in electronic devices and the like are increasingly required to be miniaturized, it must be acknowledged that there is a delay in responding to this demand in the configuration of acoustic transducers, especially speakers. It is safe to say that the main reason for this is the fateful result of the cone-shaped diaphragm that is widely used in WJs.
コーン形振動板ではそのコーンの開口頂角θが一定角度
以内でなければ振動板としての所要の剛性を保有するこ
とができない。そして、開口頂角θは一般に約１４０’
までが限度であって、それを越えるとコーン形振動板の
剛性は急速に低下してほとんど実用にはならない。この
ことは、通常材質として紙を使用するコーン形振動板以
外にプラスチックを使用するプラスチックコーン形振動
板においてもほぼ同様である。また、コーンの奥行寸法
ｄは、ｄ＝ｒｔａｎ（π−θ）／２ （ここで、ｒは開
口半径）のように幾何学的に決まるから、コーン形振動
板を用いるスピーカではコーンの開口半径ｒが大きくな
れば、必然的にスピーカの座高が大きくなるのは当然の
ことである。A cone-shaped diaphragm cannot have the required rigidity as a diaphragm unless the aperture angle θ of the cone is within a certain angle. The aperture angle θ is generally about 140'
is the limit, and beyond that the rigidity of the cone-shaped diaphragm rapidly decreases, making it almost impractical. This is generally the same for plastic cone-shaped diaphragms that use plastic in addition to cone-shaped diaphragms that usually use paper as a material. In addition, the depth dimension d of the cone is determined geometrically as d=rtan(π-θ)/2 (where r is the aperture radius), so in a speaker using a cone-shaped diaphragm, the cone aperture radius It is a matter of course that as r becomes larger, the sitting height of the speaker inevitably becomes larger.
［発明が解決しようとする問題点］
上記のような従来のコーン形振動板を用いたスピーカに
おいては、上述のようにコーン形振動板のコーンの開口
頂角θやコーンの奥行寸法ｄ等にそれぞれ制約されて、
所望の特性及び形状構造のコーン形振動板を用いた薄形
のスピーカを得ることは非常に困難であった。そこで、
近頃では薄形の形状構造を有する平板形の振動板、特に
ハニカム板を用いた振動板が提案されているが、この種
の振動板では剛性面分布が全面的に均等であるために広
帯域再生には不適当であり、しかも構造上からもその加
工が複雑で一般に高価であるので、量産性に冨んだ普及
品としての小形スピーカに使用することは可成難しいと
いう問題点があった。[Problems to be Solved by the Invention] In a speaker using a conventional cone-shaped diaphragm as described above, as described above, the aperture angle θ of the cone of the cone-shaped diaphragm, the depth dimension d of the cone, etc. Each is restricted,
It has been extremely difficult to obtain a thin speaker using a cone-shaped diaphragm with desired characteristics and shape. Therefore,
Recently, flat plate-shaped diaphragms with a thin shape structure, particularly diaphragms using honeycomb plates, have been proposed, but this type of diaphragm has uniform stiffness distribution over the entire surface, so it is difficult to reproduce a wide band. In addition, it is structurally complicated to process and generally expensive, so it is difficult to use it in small speakers as popular products that can be mass-produced.
この発明は、かかる問題点を解決するためになされたも
ので、音圧の放射効率が高く、主として中形の開口径以
下の小形スピーカに好適であると共に、量産性に富んだ
偏平形スピーカを得ることを目的とする。This invention was made in order to solve these problems, and is suitable for use in small speakers with high sound pressure radiation efficiency, mainly with a medium aperture diameter or less, and is suitable for use in flat speakers that can be easily mass-produced. The purpose is to obtain.
［問題点を解決するための手段］
この発明に係る偏平形スピーカは、振動板として、その
円周方向に向かい放射状に連続して配列形成された波ひ
だを設け、その内周基部を内接円筒に結合し、その外周
端部をエツジに結合して一体化し、上記波ひだの内包角
が中心部から外周部に向かい順次に拡大するように構成
したものである。[Means for Solving the Problems] The flat speaker according to the present invention is provided with wave folds that are continuously arranged radially in the circumferential direction as a diaphragm, and whose inner peripheral base is inscribed. It is connected to a cylinder, and its outer circumferential end is connected to an edge so as to be integrated, and the included angle of the wave folds increases sequentially from the center toward the outer circumference.
［作用］
この発明の偏平形スピーノＪにおいては、振動板の円周
方向に向かい放射状に連続して配列形成された波ひだを
設け、この波ひだの内包角が中心部から外周部に向かい
順次に拡大するように構成された波ひだ形振動板を備え
ているので、その剛性分布は半径方向に中心部から外周
部に向けて連続的に減少するように変化し、これにより
、高音帯域では分割振動を行い、振動面の実効半径の縮
小効果のために実効質量が軽減して音圧の放射効率の高
い広帯域スピーカを実現することができる。[Function] In the flat type Supino J of the present invention, wave folds are provided that are continuously arranged radially in the circumferential direction of the diaphragm, and the included angle of the wave folds is sequentially arranged from the center to the outer circumference. Since it is equipped with a corrugated diaphragm configured to expand to By performing split vibration, the effective mass is reduced due to the effect of reducing the effective radius of the vibration surface, and a wideband speaker with high sound pressure radiation efficiency can be realized.
［実施例］
第１図はこの発明の一実施例である偏平形スピーカにお
ける波ひだ形振動板の一部欠載平面図、第２図は第１図
の波ひだ形振動板の全体の断面図である。各図において
、ｌは混抄紙又はプラスチックフィルム製の振動板であ
り、この振動板ｌにはその円周方向に向かい放射状に連
続して配列形成されたＶ字形波ひだ２が設けられている
。２ａ。[Example] Fig. 1 is a partly-excluded plan view of a corrugated diaphragm in a flat speaker according to an embodiment of the present invention, and Fig. 2 is a cross section of the entire corrugated diaphragm of Fig. 1. It is a diagram. In each figure, 1 is a diaphragm made of mixed paper or plastic film, and this diaphragm 1 is provided with V-shaped corrugations 2 that are continuously arranged radially in the circumferential direction. 2a.
２ｂは振動板ｌに設けられたＶ字形波ひだ２によってで
きる稜線である。７字形波ひだ２の内包角は、その内周
部の内包角αｌと外周部の内包角α２とはα１〈〈α２
の関係となし、内包角は内周部から外周部へ向けて半径
ｒに従って順次に連続的に拡大する。例えば、α１＝３
０’〜５０”。2b is a ridgeline formed by the V-shaped corrugations 2 provided on the diaphragm l. The included angle of the 7-shaped wave fold 2 is the included angle αl of the inner periphery and the included angle α2 of the outer periphery.
The included angle sequentially and continuously increases from the inner circumference to the outer circumference according to the radius r. For example, α1=3
0'~50''.
α２＝ １２０’〜１４０°程度とする。７字形波ひだ
２はその内周基部３を内接円筒５の外周部と強固に連結
し、また、その外周端部４を三角形斜面部６を介して波
形弾性のリングエツジ７の内周部と滑らかに連接してお
り、これらは一体化された構造となされている。７字形
波ひだ２の素材の厚みはおおむね一様とするが、場合に
よっては内周部を厚く外周部を薄くすることもできる。α2=approximately 120' to 140°. The 7-shaped wave corrugation 2 firmly connects its inner peripheral base 3 with the outer peripheral part of the inscribed cylinder 5, and also connects its outer peripheral end 4 with the inner peripheral part of the corrugated elastic ring edge 7 via the triangular slope part 6. They are smoothly connected and have an integrated structure. The thickness of the material of the 7-shaped corrugated pleats 2 is generally uniform, but depending on the case, the inner circumferential portion may be thicker and the outer circumferential portion may be thinner.
このようにして構成された振動板１に形成されたＶ字形
波ひだ２の部分は、第２図に示すようにＶ字形波ひだ２
の稜線２ａ、２ｂをビームとする細長い２等辺３角形を
形成し、その剛性分布は半径方向に連続的に変化し、内
周部の内包角α１の小さい方より外周部の内包角α２の
大きい方に向けて剛性が順次減少するようになり、すな
わち７字形波ひだ２の内周基部３は最大となり、その外
周端部４は最小となる。これはハブ、スポーク。As shown in FIG.
An elongated isosceles triangle is formed with the ridgelines 2a and 2b as beams, and its rigidity distribution changes continuously in the radial direction, and the included angle α2 at the outer periphery is larger than the smaller included angle α1 at the inner periphery. The stiffness gradually decreases in the direction, that is, the inner circumferential base 3 of the seven-shaped wave pleats 2 is at its maximum, and the outer circumferential end 4 thereof is at its minimum. This is the hub and spoke.
リームの３点で構成された自転車の車輪における剛性分
布に酷似している。従って、このような振動板ｌの内接
円筒５を駆動点としてスピーカを構成する時は、高音帯
域にて分割振動を行い、振動面の実効半径の縮小効果の
ために実効質量が軽減して音圧の放射効率の高い広帯域
スピーカを実現することができる。The stiffness distribution is very similar to the stiffness distribution in a bicycle wheel, which is made up of three points on the rim. Therefore, when constructing a speaker using the inscribed cylinder 5 of the diaphragm l as the driving point, divided vibration is performed in the high frequency range, and the effective mass is reduced due to the effect of reducing the effective radius of the vibration surface. A broadband speaker with high sound pressure radiation efficiency can be realized.
さて、上記のような振動板ｌに対する駆動源には、通常
次の二種類の駆動源が適用できる。すなわち、一つは第
３図に示すように、空隙磁界１０中に挿入した可動コイ
ル１１を内接円筒５に結合して駆動する動電形駆動方式
である。この場合に、空隙磁界ｌＯを発生する磁性体９
に希土類又はネオジュム磁石を採用して全体を極端に偏
平化したダイナミックスピーカを実現することができる
。Now, the following two types of drive sources are generally applicable to the drive source for the diaphragm l as described above. Specifically, one is an electrodynamic drive system in which a moving coil 11 inserted into an air gap magnetic field 10 is coupled to an inscribed cylinder 5 and driven, as shown in FIG. In this case, the magnetic body 9 that generates the air gap magnetic field lO
By using rare earth or neodymium magnets, it is possible to realize a dynamic speaker with an extremely flattened overall structure.
他の一つは第４図に示すように、セラミック圧電振動子
の中心部に粘弾性Ｎ１６を介して重錘１３を付加してな
る圧電振動素子１４を用いて駆動する圧電形駆動方式で
ある（特開昭６１−６５６００号公報参照）。この場合
にも、圧電振動素子１４の外周部に嵌合した弾性結合環
１５を内接円筒５に嵌入接着してさらに偏平化した圧電
形スピーカを実現することができる。これら二種類のス
ピーカの構成において、波形弾性のリングエツジ７をフ
レーム８の外縁端部に結合するが、前者の動電形ではリ
ングエツジ７と中心ダンパ１２の２個の弾性要素により
、また、後者の圧電形ではリングエツジ７の１個の弾性
要素によりそれぞれ全振動素を揺動的に支持するように
構成する。The other one is a piezoelectric drive method that uses a piezoelectric vibrating element 14, which is a ceramic piezoelectric vibrator with a weight 13 attached to the center via a viscoelastic N16, as shown in Fig. 4. (Refer to Japanese Patent Application Laid-Open No. 61-65600). In this case as well, the elastic coupling ring 15 fitted to the outer periphery of the piezoelectric vibrating element 14 is fitted and bonded to the inner cylinder 5 to realize a piezoelectric speaker that is further flattened. In these two types of speaker configurations, a corrugated elastic ring edge 7 is coupled to the outer edge of the frame 8; In the piezoelectric type, one elastic element of the ring edge 7 is configured to swingably support all the vibration elements.
上記のようにして構成された二種類のスピーカにおいて
は、フレーム８に設けられた入力端子１７より信号電圧
ｅを印可すれは、動電形では可動コイル１１の起振力が
、また、圧電形では圧電振動素子１４により第４図に点
線で示すごとく凹面レンズ状の振動モードの起振力Ｆが
それぞれ内接円筒５を介して各振動板１に加わり、この
ためそれぞれの振動板ｌは励振振動して高い音圧８を放
射する。これら二種類の各振動板ｌの素材として適度の
伝達損失を保有する混抄紙又はプラスチックフィルムを
採用すれば、その出力音圧特性は第５図に示すように、
■動電形スピーカ（２，８Ｖ。In the two types of speakers configured as described above, when a signal voltage e is applied from the input terminal 17 provided on the frame 8, the excitation force of the moving coil 11 is generated in the electrodynamic type, and the excitation force of the moving coil 11 is generated in the piezoelectric type. Then, as shown by the dotted line in FIG. 4, the piezoelectric vibrating element 14 applies an excitation force F in a concave lens-like vibration mode to each diaphragm 1 via the inscribed cylinder 5, so that each diaphragm 1 is excited. It vibrates and emits high sound pressure 8. If mixed paper or plastic film with appropriate transmission loss is used as the material for each of these two types of diaphragms l, the output sound pressure characteristics will be as shown in Figure 5.
■Electrodynamic speaker (2.8V.
３０ｃｍ）、 ■圧電形スピーカ（ＩＯＶ、３０ｃｍ
）において、周波数１ｋＨ２を中心に、低音帯域では全
面一様なピストン運動を行い、また高音帯域では分割＃
ｉ勤を行って広帯域にわたり効率良く音圧Ｐ。（ｄＢ）
を放射して平坦な周波数応答特性を得ることができる。30cm), ■Piezoelectric speaker (IOV, 30cm)
), the piston moves uniformly over the entire surface in the bass band, centering on a frequency of 1kHz, and in the treble band, the piston moves in a divided #
Efficient sound pressure P over a wide band by performing i-shift. (dB)
can be used to obtain a flat frequency response characteristic.
以上述べた実施例では、基本形として７字形波ひだ２が
直線の三角波形のものを示しているが、第６図に示すよ
うに丸味を持つ波形、例えば正弦波形に変形した形状に
しても良く、この形状のものは製作する上で成形プレス
が容易になる。また、第７図に示すようにＶ字形波ひだ
２の稜線２ａ。In the embodiments described above, the basic shape of the 7-shaped wave folds 2 is shown as a straight triangular waveform, but as shown in FIG. , This shape makes it easier to press for forming. Moreover, as shown in FIG. 7, the ridgeline 2a of the V-shaped corrugated fold 2.
２ｂを湾曲して先端部を細くする形状とするか、あるい
は、第８図に示すように稜線２ａ、２ｂを円周方向に向
けて一様に湾曲させる形状とすることにより、中音帯域
に起こり勝ちな定在波振動を分散除去することができる
。さらにまた、第９図に示すように振動板１の外形形状
の全体を楕円形に変形し、機器に対するスピーカの収容
スペースに適合させるようにすることができる。By curving 2b to make the tip thinner, or by curving the ridges 2a and 2b uniformly in the circumferential direction as shown in FIG. Standing wave vibrations that are likely to occur can be dispersed and removed. Furthermore, as shown in FIG. 9, the entire outer shape of the diaphragm 1 can be deformed into an ellipse to fit the space for accommodating the speaker in the device.
以上のように構成されたこの発明に係る偏平形スピーカ
は、奥行寸法ｄが間口径に左右されることが少なく、例
えば間口径が１００ｍｍの場合に、従来のコーン形振動
板では少なくとも奥行寸法ｄは１５ｍｍを必要とするが
、この発明による振動板ｌては奥行寸法ｄは約５ｍｍ以
下の極めて薄形に形成することができるので、圧電形駆
動方式の場合において特に偏平化できる特長がある。In the flat speaker according to the present invention configured as described above, the depth dimension d is less affected by the front diameter. For example, when the front diameter is 100 mm, the conventional cone-shaped diaphragm has at least the depth dimension d. However, since the diaphragm according to the present invention can be formed extremely thin with a depth dimension d of about 5 mm or less, it has the advantage that it can be made flat especially in the case of a piezoelectric drive system.
なお、この発明に係るＶ字形波ひだ２の形成された振動
板ｌが大形の間口径を有する場合に、異常な分割振動を
除去するためにざらに振動面の剛性を強化する必要があ
る場合には、第１Ｏ図に示すように振動板１の両面又は
片面におけるＶ字形波ひだ２の稜線２ａ、２ｂ上に表層
面材１８を被着する構成とすれば、極めて容易に、かつ
有効的に振動面の剛性を増強することができる。In addition, when the diaphragm l on which the V-shaped corrugations 2 according to the present invention are formed has a large diameter, it is necessary to roughly strengthen the rigidity of the vibration surface in order to eliminate abnormal split vibrations. In this case, it is extremely easy and effective to apply a surface material 18 on the ridgelines 2a and 2b of the V-shaped corrugations 2 on both or one side of the diaphragm 1 as shown in FIG. 1O. It is possible to increase the rigidity of the vibration surface.
また、この発明に係る７字形波ひだ２の形成された振動
板１の製造方法では、素材が混抄紙の場合には従来のコ
ーン形振動板と同様に水砂加熱プレス法により、また、
プラスチックフィルム（ポリプロピレン等を用い、成形
後に振動抑制ダンプ剤を塗布するを可とする）の場合に
は加熱金型による空気圧力成形法もしくは真空成形法に
よりそれぞれ容易に量産できるので、良質の振動板が安
価に得られる。In addition, in the method for manufacturing the diaphragm 1 on which the 7-shaped corrugated pleats 2 are formed according to the present invention, when the material is mixed paper, it can be manufactured using the water-sand heated pressing method as in the case of conventional cone-shaped diaphragms.
In the case of plastic film (using polypropylene, etc., which can be coated with a vibration suppressing damping agent after molding), it can be easily mass-produced by air pressure molding using a heated mold or vacuum molding, so it is possible to produce high-quality diaphragms. can be obtained at low cost.
［発明の効果］
この発明は以上説明したとおり、偏平形スピーカにおい
て、振動板として、その円周方向に向かい放射状に連続
して配列形成された波ひだな設け、その内周基部を内接
円筒に結合し、その外周端部をエツジに結合して一体化
し、上記波ひだの内包角が中心部から外周部に向かい順
次に拡大するように構成したので、音圧の放射効率が高
く、主として中形の開口径以下の小形スピーカに好適で
あると共に、極めて量産性に富み、かつ安価に構成でき
る偏平形スピーカが得られるという優れた効果を奏する
ものである。[Effects of the Invention] As described above, the present invention provides a flat speaker with corrugated folds that are continuously arranged radially in the circumferential direction of the flat speaker as a diaphragm, and whose inner circumferential base is formed into an inscribed cylinder. The outer peripheral end of the wave fold is connected to the edge and integrated, and the included angle of the wave folds is configured to expand sequentially from the center to the outer periphery, so the radiation efficiency of sound pressure is high, and the This is suitable for a small speaker having an aperture diameter of medium size or less, and has the excellent effect of providing a flat speaker that is extremely mass-producible and can be constructed at low cost.
第１図はこの発明の一実施例である偏平形スピーカにお
ける波ひだ形振動板の一部欠載平面図、第２図は第１図
の波ひだ形振動板の全体の断面図、第３図及び第４図は
第１図の波ひだ形振動板を用いた動電形スピーカ及び圧
電形スピーカの断面図、第５図は第３図及び第４図の動
電形スピーカ及び圧電形スピーカにおける音圧周波数レ
スポンス特性を示す図、第６図はこの発明の他の実施例
である偏平形スピーカにおける波ひだ形振動板の変形例
の一部欠載断面図、第７図及び第８図はこの発明の他の
実施例である偏平形スピーカにおける波ひだ形振動板の
変形例の一部欠載斜視図、第９図はこの発明の他の実施
例である偏平形スピーカの外形形状を変形した場合の平
面図、第１Ｏ図はこの発明の他の実施例である偏平形ス
ピーカにおける波ひだ形振動板の変形例の一部欠載斜視
図である。
図において、１・・・振動板、２・・・■字形波ひた、
２ａ、２ｂ・・・稜線、３・・・内周基部、４・・・外
周端部、５・・・内接円筒、６・・・三角形斜面部、７
・・・リングエツジ、８・・・フレーム、９・・・磁性
体、１０・・・空隙磁界、１１・・・可動コイル、１２
・・・中心ダンパ、１３・・・重錘、１４・・・圧電撮
動素子、１５・・・弾性結合環、１６・・・粘弾性層、
１７・・・入力端子、１８・・・表層面材 である。
なお、各図中、同一符号は同一、又は相当部分を示す。
第７図
第９１！Ｉ
第８図
１８： ＃ＪｔＪ校FIG. 1 is a partially cut-out plan view of a corrugated diaphragm in a flat speaker according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the entire corrugated diaphragm of FIG. 1, and FIG. 4 and 4 are cross-sectional views of the electrodynamic speaker and piezoelectric speaker using the corrugated diaphragm shown in FIG. 1, and FIG. 5 is the cross-sectional view of the electrodynamic speaker and piezoelectric speaker shown in FIGS. 3 and 4. FIG. 6 is a partially missing cross-sectional view of a modified example of a corrugated diaphragm in a flat speaker according to another embodiment of the present invention, and FIGS. 7 and 8 9 is a partially cutaway perspective view of a modified example of the corrugated diaphragm in a flat speaker according to another embodiment of the invention, and FIG. 9 shows the external shape of the flat speaker according to another embodiment of the invention. FIG. 1O is a partially cutaway perspective view of a modified example of the corrugated diaphragm in a flat speaker according to another embodiment of the present invention. In the figure, 1... diaphragm, 2... ■-shaped wave plate,
2a, 2b...Ridge line, 3...Inner circumference base, 4...Outer circumference end, 5...Inscribed cylinder, 6...Triangular slope portion, 7
... Ring edge, 8 ... Frame, 9 ... Magnetic body, 10 ... Air gap magnetic field, 11 ... Moving coil, 12
... center damper, 13 ... weight, 14 ... piezoelectric imaging element, 15 ... elastic coupling ring, 16 ... viscoelastic layer,
17... Input terminal, 18... Surface material. In each figure, the same reference numerals indicate the same or equivalent parts. Figure 7 91! I Figure 8 18: #JtJ school
Claims (2)
い放射状に連続して配列形成された波ひだを設け、その
内周基部を内接円筒に結合し、その外周端部をエッジに
結合して一体化し、上記波ひだの内包角が中心部から外
周部に向かい順次に拡大するように構成された波ひだ形
振動板を備えたことを特徴とする偏平形スピーカ。(1) In a speaker, wave folds are provided that are continuously arranged radially in the circumferential direction of the diaphragm, and the inner peripheral base is connected to the inscribed cylinder, and the outer peripheral end is connected to the edge. 1. A flat speaker comprising a corrugated diaphragm which is integrated with the corrugated diaphragm and is configured such that the included angle of the corrugated corrugations gradually increases from the center toward the outer periphery.
される上記波ひだの稜線上に表層面材を被着したことを
特徴とする特許請求の範囲第１項記載の偏平形スピーカ
。(2) The flat speaker according to claim 1, wherein the corrugated diaphragm has a surface material attached to the ridgeline of the corrugated corrugations formed on one or both surfaces thereof. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10828387A JPS63274296A (en) | 1987-04-30 | 1987-04-30 | Flat speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10828387A JPS63274296A (en) | 1987-04-30 | 1987-04-30 | Flat speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63274296A true JPS63274296A (en) | 1988-11-11 |
Family
ID=14480727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10828387A Pending JPS63274296A (en) | 1987-04-30 | 1987-04-30 | Flat speaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63274296A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2696611A1 (en) * | 1992-09-28 | 1994-04-08 | Stamp Sa | Electro-acoustic transducer with diffusing volume. |
| WO2005107315A1 (en) * | 2004-04-29 | 2005-11-10 | Koninklijke Philips Electronics N.V. | Diaphragm for a loudspeaker with a moving coil |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5746391B2 (en) * | 1974-10-15 | 1982-10-02 |
-
1987
- 1987-04-30 JP JP10828387A patent/JPS63274296A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5746391B2 (en) * | 1974-10-15 | 1982-10-02 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2696611A1 (en) * | 1992-09-28 | 1994-04-08 | Stamp Sa | Electro-acoustic transducer with diffusing volume. |
| WO2005107315A1 (en) * | 2004-04-29 | 2005-11-10 | Koninklijke Philips Electronics N.V. | Diaphragm for a loudspeaker with a moving coil |
| US7416047B2 (en) | 2004-04-29 | 2008-08-26 | Ewald Frasl | Diaphragm for a loudspeaker with a moving coil |
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