JP4815646B2 - Speaker edge, speaker diaphragm and speaker using the same - Google Patents

Speaker edge, speaker diaphragm and speaker using the same Download PDF

Info

Publication number
JP4815646B2
JP4815646B2 JP2007218213A JP2007218213A JP4815646B2 JP 4815646 B2 JP4815646 B2 JP 4815646B2 JP 2007218213 A JP2007218213 A JP 2007218213A JP 2007218213 A JP2007218213 A JP 2007218213A JP 4815646 B2 JP4815646 B2 JP 4815646B2
Authority
JP
Japan
Prior art keywords
edge
speaker
diaphragm
outer peripheral
thickness
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 - Fee Related
Application number
JP2007218213A
Other languages
Japanese (ja)
Other versions
JP2009055177A (en
Inventor
浩靖 雲
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.)
Onkyo Corp
Original Assignee
Onkyo Corp
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 Onkyo Corp filed Critical Onkyo Corp
Priority to JP2007218213A priority Critical patent/JP4815646B2/en
Publication of JP2009055177A publication Critical patent/JP2009055177A/en
Application granted granted Critical
Publication of JP4815646B2 publication Critical patent/JP4815646B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Diaphragms For Electromechanical Transducers (AREA)

Description

本発明は、音響再生のためのスピーカーに用いるエッジ、及びこれを用いたスピーカー振動板、並びに、スピーカーに関する。   The present invention relates to an edge used for a speaker for sound reproduction, a speaker diaphragm using the edge, and a speaker.

スピーカーは、特に動電型スピーカーにおいては、内周側でボイスコイルに連結するスピーカー振動板を所定位置に中心保持し、かつ、良好に振動可能にするために、スピーカー振動板の外周端にエッジが設けられる。コーン型振動板で一般に用いられるフリーエッジは、その内周側がコーン型振動板の外周端側に接合され、その外周側がフレームに接合されて固定され、それらの間に可とう性材料で形成されてスピーカー振動板を弾性的に支持する可動部を備える。スピーカー用エッジの形状および材料などについては、様々な検討がなされている。   Speakers, especially for electrodynamic speakers, have an edge at the outer periphery of the speaker diaphragm in order to hold the speaker diaphragm connected to the voice coil on the inner circumference side in the center and to allow good vibration. Is provided. The free edge generally used in the cone type diaphragm is joined to the outer peripheral end of the cone type diaphragm, the outer circumference is joined to the frame and fixed, and is made of a flexible material between them. A movable portion that elastically supports the speaker diaphragm. Various studies have been made on the shape and material of the speaker edge.

従来のスピーカー用エッジの可動部の形状は、ロールエッジ、または、コルゲーションを有するギャザーエッジが代表的であり、他にもスピーカーが再生する音声の周波数によって様々な検討がされている。すなわち、スピーカー振動板の変位振幅が大きい低音域での動作において、エッジの可動部の形状を工夫して、スピーカーの再生低域限界周波数f0に影響する可動部の柔軟性を確保し、異音を生じる等の不良が生じにくくし、直線性と対称性を改善して非直線歪を低減しようとするものがある。また、一方で、スピーカー振動板の変位振幅が小さい中高音域での動作においても、スピーカー振動板を構成する材料に比べて軟らかいエッジが分割振動して、周波数特性上にピークディップが生じる場合があり、エッジの可動部の形状を工夫して、このピークディップを低減しようとするものがある。   The shape of the movable part of the conventional speaker edge is typically a roll edge or a gathered edge having corrugation, and various other studies have been made depending on the frequency of sound reproduced by the speaker. That is, in the operation in the low range where the displacement amplitude of the speaker diaphragm is large, the shape of the movable portion of the edge is devised to ensure the flexibility of the movable portion that affects the reproduction low limit frequency f0 of the speaker, Some of them try to reduce non-linear distortion by making it difficult to cause defects such as the occurrence of defects and improving linearity and symmetry. On the other hand, even in the operation in the mid-high range where the displacement amplitude of the speaker diaphragm is small, the edge softer than the material constituting the speaker diaphragm may divide and cause peak dip on the frequency characteristics. There is one that attempts to reduce this peak dip by devising the shape of the movable part of the edge.

また、従来には、スピーカー用エッジの半径方向の断面において、エッジの可動部の厚みを半径方向に変化させるものがある。例えば、スピーカー用エッジの形状として、エッジの断面曲線部における振動板又はフレーム接合部近傍部分の剛性を、エッジの断面曲線部における中央部近傍部分の剛性より大きく構成したものがある(特許文献1)。また、例えば、エッジの断面形状が連続する3個以上のロール形状からなり、両外側のロール形状部分の厚さが中央側のロール形状部分の厚さよりも厚くされているスピーカー、あるいは、エッジの断面形状が連続する3個以上のロール形状からなり、両外側のロール形状の半径が中央側のロール形状の半径と異なるスピーカーがある(特許文献2)。また、振動板とエッジとが一体に形成されているフィックスド・エッジタイプのスピーカー振動板において、振動板と肉厚同一なエッジに削加工やその他の後処理加工を施して、前面側頂部もしくは後面側頂部の全周(または適宜間隔ごと)に渡って薄肉部を形成しているスピーカー振動板がある(特許文献3)。   Further, there is a conventional technique that changes the thickness of the movable portion of the edge in the radial direction in the cross section in the radial direction of the speaker edge. For example, as a shape of the edge for a speaker, there is a configuration in which the rigidity in the vicinity of the diaphragm or frame joint portion in the cross-sectional curve portion of the edge is larger than the rigidity in the vicinity of the central portion in the cross-sectional curve portion of the edge (Patent Document 1). ). Further, for example, a speaker having three or more roll shapes in which the cross-sectional shape of the edge is continuous, and the thickness of the roll shape portions on both outer sides is thicker than the thickness of the roll shape portion on the center side, or the edge There is a speaker which consists of three or more roll shapes with continuous cross-sectional shapes, and the radius of the roll shape on both outer sides is different from the radius of the roll shape on the center side (Patent Document 2). In addition, in the fixed edge type speaker diaphragm in which the diaphragm and the edge are integrally formed, the edge having the same thickness as the diaphragm is subjected to cutting or other post-processing, and the front side top part or There is a speaker diaphragm in which a thin portion is formed over the entire circumference (or at appropriate intervals) of the rear side top (Patent Document 3).

実開昭59−147392号公報Japanese Utility Model Publication No. 59-147392 特開2000−217192号公報 (第6図〜第8図)JP 2000-217192 A (FIGS. 6 to 8) 実開昭57−64989号公報 (第1図〜第4図)Japanese Utility Model Publication No. 57-64989 (FIGS. 1 to 4)

しかしながら、従来技術のスピーカー用エッジおよびこれを用いたスピーカーでは、低音域での大きい変位振幅への対応と、中高音域での周波数特性上のピークディップへの対応とを、両立させるには不十分な点がある。特に、口径の小さなスピーカーで、フィックスド・エッジタイプではないフリーエッジの振動板で大きな変位振幅を実現させようとする場合に、従来のギャザーエッジを採用すると、ギャザーエッジの不要な分割振動によって周波数特性上にピークディップが生じ、大きな変位振幅の際にエッジ形状が変形して、異音が生じる等の問題が出る場合があり、その形状を工夫しなければならない。   However, the edge of a conventional speaker and a speaker using the same are not able to satisfy both a response to a large displacement amplitude in a low sound range and a response to a peak dip in a frequency characteristic in a middle and high sound range. There are enough points. In particular, when using a conventional gather edge to achieve a large displacement amplitude with a free-edge diaphragm that is not a fixed-edge type with a small-diameter speaker, the frequency due to unnecessary divided vibration of the gather edge is used. There is a case where a peak dip occurs in the characteristics, the edge shape is deformed when a large displacement amplitude is generated, and there is a problem that abnormal noise is generated, and the shape must be devised.

本発明は、上記の従来技術が有する問題を解決するためになされたものであり、その目的は、スピーカーに用いるエッジ、及び、これを用いたスピーカーに関し、再生周波数範囲が広く平坦であり、振幅の大きい入力信号がボイスコイルに印加された場合であっても、異音を生じる等の不良が生じにくく、好ましい音声再生が可能なスピーカー用エッジを提供することにある。   The present invention has been made in order to solve the above-described problems of the prior art, and an object of the present invention relates to an edge used in a speaker and a speaker using the same, and a reproduction frequency range is wide and flat, and an amplitude. Even when a large input signal is applied to a voice coil, it is an object of the present invention to provide an edge for a speaker that is less likely to cause defects such as abnormal noise and that can perform preferable audio reproduction.

本発明のスピーカー用エッジは、振動板の外周端部と接合する内周接合部と、フレームと接合する外周接合部と、内周接合部と外周接合部との間に形成される可動部と、を備える略環状のスピーカー用エッジであって、可動部が、複数の山部と谷部とを形成する複数のロール頂部と、隣接する山部と谷部とを連結する複数の連結部と、を含み、内周接合部と、外周接合部と、可動部と、が、弾性材料から一体成形され、複数のロール頂部の厚みt1が、いずれの連結部の厚みt2よりも薄く形成されている。   The speaker edge according to the present invention includes an inner peripheral joint that is joined to the outer peripheral end of the diaphragm, an outer peripheral joint that is joined to the frame, and a movable portion that is formed between the inner peripheral joint and the outer joint. A plurality of roll tops forming a plurality of peaks and valleys, and a plurality of connecting parts connecting adjacent peaks and valleys. The inner peripheral joint, the outer peripheral joint, and the movable part are integrally formed from an elastic material, and the thickness t1 of the plurality of roll tops is formed thinner than the thickness t2 of any of the connecting parts. Yes.

好ましくは、本発明のスピーカー用エッジは、可動部の複数のロール頂部の厚みt1が、いずれの連結部の厚みt2の70%以下に薄く形成されている。   Preferably, in the speaker edge according to the present invention, the thickness t1 of the plurality of roll tops of the movable portion is formed to be 70% or less of the thickness t2 of any connecting portion.

さらに好ましくは、本発明のスピーカー用エッジは、内周接合部と可動部との交点を規定する可動部の内周端部と、外周接合部と可動部との交点を規定する可動部の外周端部と、可動部の複数のロール頂部のうち谷部を形成するロール頂部とが、全周に渡って同一平面上に位置する。   More preferably, the speaker edge of the present invention has an inner peripheral end portion of the movable portion that defines an intersection point between the inner peripheral joint portion and the movable portion, and an outer periphery of the movable portion that defines an intersection point between the outer peripheral joint portion and the movable portion. An end part and the roll top part which forms a trough part among several roll top parts of a movable part are located on the same plane over a perimeter.

また、本発明のスピーカー振動板は、本発明のスピーカー用エッジと、スピーカー用エッジの内周接合部をその外周端部に接合した振動板と、を備える。   The speaker diaphragm of the present invention includes the speaker edge of the present invention and a diaphragm in which the inner peripheral joint portion of the speaker edge is joined to the outer peripheral end portion thereof.

また、本発明のスピーカーは、本発明のスピーカー振動板を備える。   The speaker of the present invention includes the speaker diaphragm of the present invention.

以下、本発明の作用について説明する。   The operation of the present invention will be described below.

本発明のスピーカー用エッジは、振動板の外周端部と接合する内周接合部と、フレームと接合する外周接合部と、内周接合部と外周接合部との間に形成される可動部とを備える略環状のスピーカー用エッジである。スピーカー用の振動板は、多くの場合にはコーン型振動板である。内周接合部は、コーン型振動板の外周端部と接合されて、コーン型振動板の振動によって加わる力が伝達される。外周固定部は、実質的にフレームに接合されて固定されている。したがって、内周接合部と外周接合部との間に形成される略環状の可動部が、スピーカー振動板を弾性的に支持する。このスピーカー用エッジを接合したスピーカー振動板を用いるスピーカーでは、スピーカー用エッジによってボイスコイルボビンを含む振動系が所定位置に中心保持され、ボイスコイルで生じた駆動力が加わってスピーカー振動板が変位する場合には、可動部が変形することにより、振動系は振動可能となる。   The speaker edge according to the present invention includes an inner peripheral joint that is joined to the outer peripheral end of the diaphragm, an outer peripheral joint that is joined to the frame, and a movable portion that is formed between the inner peripheral joint and the outer joint. Is a substantially annular edge for a speaker. The speaker diaphragm is often a cone diaphragm. The inner peripheral joint is joined to the outer peripheral end of the cone type diaphragm, and the force applied by the vibration of the cone type diaphragm is transmitted. The outer periphery fixing portion is substantially bonded and fixed to the frame. Therefore, the substantially annular movable part formed between the inner peripheral joint part and the outer peripheral joint part elastically supports the speaker diaphragm. In a speaker using a speaker diaphragm joined with this speaker edge, the vibration system including the voice coil bobbin is held at the center by the speaker edge, and the speaker diaphragm is displaced by the driving force generated by the voice coil. In addition, the vibration system can be vibrated by the deformation of the movable part.

ここで、本発明のスピーカー用エッジは、内周接合部と、外周接合部と、可動部と、が、弾性材料から一体成形され、構成する部分によって厚みが変化する。具体的には、弾性材料とは、例えば、発泡ゴム、発泡ウレタン、もしくは、ゴム、エラストマー、である。スピーカー用エッジの可動部は、複数の山部と谷部とを形成する複数のロール頂部と、隣接する山部と谷部とを連結する複数の連結部と、を含み、ギャザーエッジを形成する。本発明のスピーカー用エッジは、このギャザーを構成する複数のロール頂部の厚みt1が、いずれの連結部の厚みt2よりも薄く形成されている。好ましくは、可動部の複数のロール頂部の厚みt1が、いずれの連結部の厚みt2の40%以上で70%以下に薄く形成されている。したがって、スピーカー振動板が変位する場合には、可動部の変形は、その厚みt1が薄い複数のロール頂部の変形により実現され、その結果、その厚みt2が厚くて剛性の高い可動部の連結部は、曲げ変形による分割振動を起こすことがなくなる。その結果、周波数特性上のピークディップが現れにくくなり、平坦特性が実現される。   Here, as for the edge for speakers of this invention, an inner periphery junction part, an outer periphery junction part, and a movable part are integrally molded from an elastic material, and thickness changes with the parts to comprise. Specifically, the elastic material is, for example, foamed rubber, urethane foam, rubber, or elastomer. The movable portion of the speaker edge includes a plurality of roll top portions forming a plurality of peak portions and valley portions, and a plurality of connection portions connecting the adjacent peak portions and valley portions to form a gather edge. . In the speaker edge according to the present invention, the thickness t1 of the plurality of roll tops constituting the gather is formed thinner than the thickness t2 of any connecting portion. Preferably, the thickness t1 of the plurality of roll tops of the movable part is formed to be 40% or more and 70% or less of the thickness t2 of any connecting part. Therefore, when the speaker diaphragm is displaced, the deformation of the movable part is realized by the deformation of the tops of the plurality of rolls whose thickness t1 is thin, and as a result, the connecting part of the movable part having a high thickness t2 and high rigidity. Does not cause split vibration due to bending deformation. As a result, a peak dip on the frequency characteristic is less likely to appear, and a flat characteristic is realized.

また、更に好ましいスピーカー用エッジでは、内周接合部と可動部との交点を規定する可動部の内周端部と、外周接合部と可動部との交点を規定する可動部の外周端部と、可動部の複数のロール頂部のうち谷部を形成するロール頂部とが、全周に渡って同一平面上に位置している場合には、可動部を形成する複数の連結部は、断面形状においてほぼ等しい断面長を有するようになる。したがって、複数の連結部のうちで、それらのいずれかの強度が弱くなったり強くなったりすることが無く、さらに、スティフネスも可動部の内周側と外周側とで大きく異なることが無くなるので、低音域での大きい変位振幅にも対応することができ、振幅の大きい入力信号がボイスコイルに印加された場合であっても、異音を生じる等の不良が生じにくくできる。その結果、本発明のスピーカー用エッジを用いたスピーカーは、再生周波数範囲が広く、従来のロールエッジから置き換えても最低共振周波数f0が変化しにくく、振幅の大きい入力信号がボイスコイルに印加された場合であっても、異音を生じる等の不良が生じにくく、好ましい音声再生が可能になる。   Further, in a more preferable speaker edge, an inner peripheral end portion of the movable portion that defines an intersection point between the inner peripheral joint portion and the movable portion, and an outer peripheral end portion of the movable portion that defines an intersection point between the outer peripheral joint portion and the movable portion. When the roll tops forming the valleys among the plurality of roll tops of the movable part are located on the same plane over the entire circumference, the plurality of connecting parts forming the movable part are cross-sectional shapes Have substantially the same cross-sectional length. Therefore, among the plurality of connecting parts, the strength of any of them does not become weaker or stronger, and further, the stiffness is not greatly different between the inner peripheral side and the outer peripheral side of the movable part, It is possible to cope with a large displacement amplitude in the low sound range, and even when an input signal having a large amplitude is applied to the voice coil, it is difficult to cause defects such as abnormal noise. As a result, the speaker using the speaker edge according to the present invention has a wide reproduction frequency range, and even when replaced with the conventional roll edge, the lowest resonance frequency f0 hardly changes, and an input signal having a large amplitude is applied to the voice coil. Even in this case, it is difficult to cause defects such as abnormal noise, and preferable audio reproduction is possible.

本発明のスピーカー用エッジを用いたスピーカーは、再生周波数範囲が広く平坦であり、振幅の大きい入力信号がボイスコイルに印加された場合であっても、異音を生じる等の不良が生じにくく、好ましい音声再生が可能なスピーカーを実現できる。   The speaker using the speaker edge of the present invention has a wide reproduction frequency range and is flat, and even when an input signal having a large amplitude is applied to the voice coil, it is difficult to cause defects such as abnormal noise, A speaker capable of preferable audio reproduction can be realized.

本発明のスピーカー用エッジは、再生周波数範囲が広く平坦であり、振幅の大きい入力信号がボイスコイルに印加された場合であっても、異音を生じる等の不良が生じにくく、好ましい音声再生が可能なスピーカーを実現するという目的を、振動板の外周端部と接合する内周接合部と、フレームと接合する外周接合部と、内周接合部と外周接合部との間に形成される可動部と、を備える略環状のスピーカー用エッジであって、可動部が、複数の山部と谷部とを形成する複数のロール頂部と、隣接する山部と谷部とを連結する複数の連結部と、を含み、内周接合部と、外周接合部と、可動部と、が、弾性材料から一体成形され、複数のロール頂部の厚みt1が、いずれの連結部の厚みt2よりも薄く形成されているようにすることにより、実現した。   The speaker edge of the present invention has a wide reproduction frequency range and is flat, and even when an input signal having a large amplitude is applied to the voice coil, it is unlikely to cause defects such as abnormal noise, and preferable sound reproduction is possible. The purpose of realizing a possible speaker is a movable joint formed between the inner peripheral joint that joins the outer peripheral edge of the diaphragm, the outer peripheral joint that joins the frame, and the inner peripheral joint and the outer peripheral joint. And a plurality of linkages connecting a plurality of roll tops forming a plurality of crests and troughs, and adjacent crests and troughs. The inner peripheral joint, the outer peripheral joint, and the movable part are integrally formed from an elastic material, and the thickness t1 of the plurality of roll tops is thinner than the thickness t2 of any of the connecting parts. Realized by being It was.

以下、本発明の好ましい実施形態によるスピーカー用エッジおよびこれを用いたスピーカー振動板ならびにスピーカーについて説明するが、本発明はこれらの実施形態には限定されない。   Hereinafter, although the edge for speakers by the preferred embodiment of the present invention, the speaker diaphragm using the same, and the speaker are explained, the present invention is not limited to these embodiments.

図1は、本発明の好ましい実施形態によるスピーカー用エッジ10を用いたスピーカー1について説明する断面図である。本実施例のスピーカー1は、口径10cmの動電型スピーカーであり、円形コーン型振動板8を備え、後述するエッジ10は、この円形コーン型振動板8の外周端に接合されている。なお、図1の断面図において、軸対称となる左半分は、省略している。   FIG. 1 is a cross-sectional view illustrating a speaker 1 using a speaker edge 10 according to a preferred embodiment of the present invention. The speaker 1 of this embodiment is an electrodynamic speaker having a diameter of 10 cm, and includes a circular cone diaphragm 8, and an edge 10 to be described later is joined to the outer peripheral end of the circular cone diaphragm 8. In the cross-sectional view of FIG. 1, the left half that is axially symmetric is omitted.

スピーカー1は、他に、ポール、マグネット、プレート、キャンセルマグネットおよびカバーから構成されて磁気空隙3を備える磁気回路2と、磁気回路2に取り付けられてコーン型振動板8を振動可能に支持するフレーム4と、磁気空隙3に配置されるボイスコイル5と、ボイスコイル5が巻回されるボビン6と、外周端をフレーム4に接合し内周端をボビン6に接合するダンパー7と、ボビン6の上端側をその背面側に有する取付部に接合するコーン型振動板8と、を備える。なお、ボイスコイル5へ音声信号電流を供給する錦糸線ならびにターミナルは、図1では省略している。   In addition, the speaker 1 includes a magnetic circuit 2 including a magnetic gap 3 that includes a pole, a magnet, a plate, a cancel magnet, and a cover, and a frame that is attached to the magnetic circuit 2 and supports the cone-shaped diaphragm 8 so as to vibrate. 4, a voice coil 5 disposed in the magnetic gap 3, a bobbin 6 around which the voice coil 5 is wound, a damper 7 having an outer peripheral end joined to the frame 4 and an inner peripheral end joined to the bobbin 6, and a bobbin 6 A cone-shaped diaphragm 8 that is joined to a mounting portion having an upper end side thereof on the back side thereof. Note that the tinsel wire and terminal for supplying the voice signal current to the voice coil 5 are omitted in FIG.

スピーカー1では、強い直流磁界が発生する磁気空隙2中にボイスコイル5が配置され、このボイスコイル5に音声信号電流が供給されると、コーン型振動板8の前後方向(図1の上下矢印方向)に駆動力が発生し、ボイスコイル5、ボビン6、ダンパー7、コーン型振動板8、そして、エッジ10から構成されるスピーカー振動系が前後方向に振動する。つまり、スピーカー振動系は、ダンパー7およびエッジ10によって振動可能に支持されており、その結果、その前後に存在する空気に圧力変化を生じ、音声信号電流を音波(音声)に変換する。   In the speaker 1, a voice coil 5 is disposed in a magnetic gap 2 where a strong DC magnetic field is generated. When an audio signal current is supplied to the voice coil 5, the front and rear direction of the cone-shaped diaphragm 8 (up and down arrows in FIG. 1). Driving force is generated in the direction), and the speaker vibration system composed of the voice coil 5, the bobbin 6, the damper 7, the cone-type diaphragm 8, and the edge 10 vibrates in the front-rear direction. That is, the speaker vibration system is supported by the damper 7 and the edge 10 so as to be able to vibrate. As a result, a pressure change occurs in the air present before and after the vibration, and the sound signal current is converted into a sound wave (sound).

円形コーン型振動板8は、例えば、不織布もしくは織布等を基材として熱硬化性樹脂で形成した振動板であって、コーン部およびダストキャップ部を一体成型した振動板であり、ボビン6並びにエッジ10とは、接着剤により接合される。円形コーン型振動板8は、内周側から外周側に向かうにつれて前側に広がる凹面を形成する振動板であり、円形コーン型振動板8の外径は約φ77mmである。なお、円形コーン型振動板8の凹面が形成される面の方を前側と、円形コーン型振動板8の凸面側であってボビン6が配置されて接合される面の方を後側とする。なお、円形コーン型振動板8は、金属若しくは樹脂で形成した振動板であっても良く、また、抄紙により得られるコーン形振動板であっても良い。   The circular cone diaphragm 8 is a diaphragm formed of a thermosetting resin using, for example, a nonwoven fabric or a woven fabric as a base material, and is a diaphragm in which a cone portion and a dust cap portion are integrally molded. The edge 10 is joined by an adhesive. The circular cone type diaphragm 8 is a diaphragm that forms a concave surface that spreads toward the front side from the inner circumference side toward the outer circumference side, and the outer diameter of the circular cone type diaphragm 8 is about φ77 mm. The surface on which the concave surface of the circular cone diaphragm 8 is formed is the front side, and the surface on the convex surface side of the circular cone diaphragm 8 where the bobbin 6 is disposed and joined is the rear side. . The circular cone diaphragm 8 may be a diaphragm made of metal or resin, or may be a cone diaphragm obtained by paper making.

図2は、エッジ10の半径方向の断面形状を説明する断面図である。エッジ10は、発泡ゴムを金型内部に注入して熱プレス成型して発泡させて所定の形状を得て、内周側及び外周側を切断型で切断して、略環状のギャザーエッジの形状に成形したスピーカー用エッジである。エッジ10は、コーン型振動板8の外周端部と接合する内周接合部11と、フレーム4と接合する外周接合部12と、内周接合部11と外周接合部12との間に形成される可動部13とを備える。   FIG. 2 is a cross-sectional view illustrating a cross-sectional shape of the edge 10 in the radial direction. The edge 10 is formed in a shape of a substantially annular gather edge by injecting foamed rubber into the mold and foaming by hot press molding to obtain a predetermined shape, and cutting the inner peripheral side and the outer peripheral side with a cutting die. This is an edge for a speaker molded into The edge 10 is formed between an inner peripheral joint 11 that joins the outer peripheral end of the cone-shaped diaphragm 8, an outer peripheral joint 12 that joins the frame 4, and the inner peripheral joint 11 and the outer peripheral joint 12. The movable part 13 is provided.

エッジ10の内周接合部11は、コーン型振動板8の外周端部と接合する短いコーン形状の部分であり、内周側から外周側に向かうにつれて前側に広がる凹面を形成し、コーン型振動板8の後側から外周端に接着されている。その結果、内周接合部11は、円形コーン型振動板8の外周端の形状に沿う形状であり、その内直径はφ66mm、その外直径はφ76.3mm、厚み0.5mmである。なお、内周接合部11の外周側の端部には、円形コーン型振動板8の外周端の形状に沿って、後述する可動部13の内周端部13aに連結する折り返し部が形成されている。   The inner peripheral joint portion 11 of the edge 10 is a short cone-shaped portion that is joined to the outer peripheral end portion of the cone-shaped diaphragm 8, and forms a concave surface that spreads forward from the inner peripheral side toward the outer peripheral side. The plate 8 is bonded to the outer peripheral end from the rear side. As a result, the inner peripheral joint portion 11 has a shape that conforms to the shape of the outer peripheral end of the circular cone-type diaphragm 8, and has an inner diameter of φ66 mm, an outer diameter of φ76.3 mm, and a thickness of 0.5 mm. In addition, a folded portion connected to an inner peripheral end portion 13a of the movable portion 13 described later is formed at the outer peripheral end portion of the inner peripheral joint portion 11 along the shape of the outer peripheral end of the circular cone diaphragm 8. ing.

また、エッジ10の外周接合部12は、フレーム4と接合する平坦な部分を有しており、その内直径はφ92.5mm、その外直径はφ102.7mmである。外周接合部12の内周側の端部には、後述する可動部13の外周端部13bに連結する平坦部が形成されている。外周接合部12は、内周側から外周側に至るにつれて、厚みが0.5mmから増大し、ガスケットを代用するように2.5mmに厚く形成されているガスケット部14を有する。なお、外周接合部12のガスケット部14は、弾性を有する材質で形成されて、それ自身の強度によってエッジ10の形状を維持するものであればよく、あるいは、全周に渡って別体のガスケット(もしくは矢紙)がその前面側(もしくは背面側)に接着されていてもよい。   Further, the outer peripheral joint portion 12 of the edge 10 has a flat portion to be joined to the frame 4 and has an inner diameter of φ92.5 mm and an outer diameter of φ102.7 mm. A flat portion connected to an outer peripheral end portion 13b of the movable portion 13 described later is formed at the inner peripheral end portion of the outer peripheral joint portion 12. The outer peripheral joint portion 12 has a gasket portion 14 that increases in thickness from 0.5 mm as it goes from the inner peripheral side to the outer peripheral side, and is thickened to 2.5 mm so as to substitute the gasket. The gasket portion 14 of the outer peripheral joint portion 12 may be formed of a material having elasticity and maintain the shape of the edge 10 by its own strength, or a separate gasket over the entire circumference. (Or arrow paper) may be bonded to the front side (or back side).

エッジ10の可動部13は、山部15と谷部16とを形成する複数のロール頂部と、隣接する山部15と谷部16とを連結する複数の連結部17と、を含むギャザーエッジを形成する。具体的には、可動部13のギャザーは、ギャザーの稜線を形成するロール頂部として、前面側から見た場合に2つの山部15aおよび15bと、これらの山部15aおよび15bに挟まれる一つの谷部16aと、を含む。山部15aと谷部16aとの半径方向における離間距離は2.0mmであり、谷部16aと山部15bとの半径方向における離間距離も2.0mmである。また、前後方向の山部15aと谷部16aとの距離は、ギャザーエッジのギャザーの深さを規定し、本実施例の場合には5.0mmである。これらのロール頂部の厚みt1は、内周接合部11および外周接合部12の厚みよりも薄く、また、後述するように、ロール頂部を連結しギャザーを構成する連結部17の厚みt2よりも薄く形成されている。ロール頂部の厚みt1は共通に設定されており、発泡ゴムで成形される山部15および谷部16のロール頂部の厚みt1は、0.2mm〜0.35mmの間で、つまり、後述する連結部17の厚みt2の40%〜70%の範囲で、設定される。   The movable portion 13 of the edge 10 has a gather edge including a plurality of roll top portions forming the peak portions 15 and the valley portions 16 and a plurality of connection portions 17 connecting the adjacent peak portions 15 and the valley portions 16. Form. Specifically, the gather of the movable part 13 is a roll top part that forms a ridge line of the gather, and when viewed from the front side, the two peaks 15a and 15b and one peak sandwiched between these peaks 15a and 15b. And a valley portion 16a. The separation distance in the radial direction between the peak portion 15a and the valley portion 16a is 2.0 mm, and the separation distance in the radial direction between the valley portion 16a and the peak portion 15b is also 2.0 mm. Further, the distance between the crest 15a and the trough 16a in the front-rear direction defines the gather depth of the gather edge, and is 5.0 mm in this embodiment. The thickness t1 of these roll top portions is thinner than the thicknesses of the inner peripheral joint portion 11 and the outer peripheral joint portion 12, and, as will be described later, is thinner than the thickness t2 of the connecting portion 17 that connects the roll top portions and constitutes a gather. Is formed. The thickness t1 of the roll top portion is set in common, and the thickness t1 of the roll top portion of the peak portion 15 and the valley portion 16 formed of foamed rubber is between 0.2 mm and 0.35 mm, that is, a connection described later. It is set in the range of 40% to 70% of the thickness t2 of the portion 17.

エッジ10の可動部13の連結部17は、隣接する山部15と谷部16とを、半径方向の断面において直線状に連結する厚みt2が一定の部分であり、ギャザーのそれぞれの面となる部分を形成し、発泡ゴムから一体成形される。連結部17aは、可動部13の内周端部13aと山部15aとの間に形成され、連結部17bは、山部15aと谷部16aとの間に形成され、連結部17cは、谷部16aと山部15bとの間に形成され、連結部17dは、山部15bと可動部13の外周端部13bとの間に形成される。連結部17a〜dの厚みt2は共通であり、内周接合部11の厚みと同様に0.5mmである。つまり、いずれの連結部17の厚みt2よりも、ロール頂部の厚みt1は、薄く形成されている。なお、内周端部13aと山部15aとの半径方向の離間距離は2.0mmであり、山部15bと外周端部13bとの半径方向の離間距離も2.0mmである。   The connecting portion 17 of the movable portion 13 of the edge 10 is a portion having a constant thickness t2 that connects the adjacent peak portions 15 and valley portions 16 in a straight line shape in the radial cross section, and is a surface of the gather. A part is formed and integrally molded from foamed rubber. The connecting part 17a is formed between the inner peripheral end part 13a of the movable part 13 and the peak part 15a, the connecting part 17b is formed between the peak part 15a and the valley part 16a, and the connecting part 17c is a valley part. The connecting portion 17 d is formed between the peak portion 15 b and the outer peripheral end portion 13 b of the movable portion 13. The thickness t2 of the connecting portions 17a to 17d is common, and is 0.5 mm like the thickness of the inner peripheral joint portion 11. That is, the thickness t1 of the roll top part is formed thinner than the thickness t2 of any connecting part 17. The radial separation distance between the inner peripheral end portion 13a and the peak portion 15a is 2.0 mm, and the radial separation distance between the peak portion 15b and the outer peripheral end portion 13b is also 2.0 mm.

エッジ10の可動部13において、可動部13の内周端部13aは、内周接合部11と可動部13との交点を規定する。同様に、可動部13の外周端部13bは、外周接合部12と可動部13との交点を規定する。可動部13の内周端部13aおよび外周端部13bは、断面図である図2に点線で示す同一の平面19上に位置するように配置されている。また、可動部13のギャザーの谷部16aも、同一の平面19上に位置するように配置されている。したがって、内周端部13aと、山部15aと、谷部16aと、山部15bと、外周端部13bとの半径方向の離間距離はそれぞれ2.0mmと等しいので、可動部13を形成する連結部17a〜17dは、断面形状においてほぼ等しい断面長を有することになる。   In the movable portion 13 of the edge 10, the inner peripheral end portion 13 a of the movable portion 13 defines an intersection between the inner peripheral joint portion 11 and the movable portion 13. Similarly, the outer peripheral end portion 13 b of the movable portion 13 defines an intersection between the outer peripheral joint portion 12 and the movable portion 13. The inner peripheral end portion 13a and the outer peripheral end portion 13b of the movable portion 13 are arranged so as to be located on the same plane 19 shown by a dotted line in FIG. Further, the gathering valleys 16 a of the movable part 13 are also arranged on the same plane 19. Accordingly, the radial distance between the inner peripheral end portion 13a, the peak portion 15a, the valley portion 16a, the peak portion 15b, and the outer peripheral end portion 13b is equal to 2.0 mm, so that the movable portion 13 is formed. The connecting portions 17a to 17d have substantially the same cross-sectional length in the cross-sectional shape.

本実施例のエッジ10では、ギャザーを形成する複数の連結部17a〜17dがほぼ同じ断面形状を有することになるので、これらのうちでいずれかの連結部の強度が弱くなったり強くなったりすることが無い。また、可動部13のロール頂部の山部15aおよび15bと、谷部16aと、において、連結部17が構成するギャザーの折れ曲がる角度は、エッジ10が静止状態で、それぞれ47.5°とほぼ一定になる。したがって、円形コーン型振動板8を含むスピーカー1の振動系が振動して、エッジ10の可動部13が変形する場合には、可動部13の変形は、その厚みt1が薄い複数のロール頂部の山部15aおよび15bと、谷部16aの変形により実現される。つまり、厚みt2が厚くて剛性の高い連結部17a〜17dに比べて、曲げ剛性の弱い山部15aおよび15b、谷部16aが湾曲して変形し、一方、連結部17a〜17dは変形による分割振動を起こさない。   In the edge 10 of the present embodiment, since the plurality of connecting portions 17a to 17d forming the gathers have substantially the same cross-sectional shape, the strength of any of the connecting portions becomes weaker or stronger. There is nothing. In addition, in the crests 15a and 15b at the top of the roll of the movable part 13 and the trough part 16a, the angle at which the gathers formed by the connecting part 17 bend is substantially constant at 47.5 ° when the edge 10 is stationary. become. Therefore, when the vibration system of the speaker 1 including the circular cone diaphragm 8 vibrates and the movable portion 13 of the edge 10 is deformed, the deformation of the movable portion 13 is caused by the deformation of the tops of a plurality of rolls having a small thickness t1. This is realized by deformation of the peaks 15a and 15b and the valley 16a. That is, the crests 15a and 15b and the trough 16a, which are weak in bending rigidity, are curved and deformed compared to the connecting parts 17a to 17d having a large thickness t2 and high rigidity, while the connecting parts 17a to 17d are divided by deformation. Does not cause vibration.

例えば、本実施例のエッジ10を含む円形コーン型振動板8を備えるスピーカー1の振動系に、1Nもしくは10Nの静荷重を与えると、フレーム4に固定される外周接合部12を基準にした内周接合部11の振幅変位を測定し、前後振幅変位の対称性と、可動部13のギャザーの動きを確認することができる。本実施例のエッジ10では、1N入力時の前面側への振幅変位は7.92mmであり、後面側への振幅変位の絶対値は8.16mmであり、非対称性を示すこれらの差は0.24mmである。また、10N入力時の前面側への振幅変位は17.63mmであり、後面側への振幅変位の絶対値は18.41mmであり、これらの差は0.78mmである。また、可動部13のギャザーの谷部16aにおける連結部17bおよび連結部17cが形成する角度は、静止時の角度47.5°から、1N入力(前面側変位)時に107.13°、1N入力(後面側変位)時に109.32°、と大きく開くことわかる。   For example, when a static load of 1 N or 10 N is applied to the vibration system of the speaker 1 including the circular cone-shaped diaphragm 8 including the edge 10 of the present embodiment, the inner periphery based on the outer peripheral joint 12 fixed to the frame 4 is used as a reference. The amplitude displacement of the circumferential joint 11 can be measured, and the symmetry of the longitudinal amplitude displacement and the gather movement of the movable portion 13 can be confirmed. In the edge 10 of this embodiment, the amplitude displacement toward the front surface at the time of 1N input is 7.92 mm, the absolute value of the amplitude displacement toward the rear surface side is 8.16 mm, and these differences indicating asymmetry are 0. .24 mm. Further, the amplitude displacement to the front side at the time of 10N input is 17.63 mm, the absolute value of the amplitude displacement to the rear side is 18.41 mm, and the difference between these is 0.78 mm. In addition, the angle formed by the connecting portion 17b and the connecting portion 17c in the gather valley 16a of the movable portion 13 is 107.13 ° and 1N input at the time of 1N input (front side displacement) from an angle of 47.5 ° when stationary. It can be seen that it opens greatly to 109.32 ° at the time of (rear surface side displacement).

本実施例のスピーカー1は、口径10cmの円形コーン型振動板8を備える小型の動電型スピーカーであるので、エッジ10が有する表面積は、円形コーン型振動板8の表面積に比して相対的に大きい。つまり、このような小型の動電型スピーカーでは、スピーカー振動系の全有効面積に占める円形コーン型振動板8の割合が低くなる反面で、エッジ10の占める割合が高くなる。したがって、エッジ10の材質ならびに形状は、再生する音声、および、振動系全体から放射される音波による音圧周波数特性に影響を与える。円形コーン型振動板8に比べて剛性が低く、軟らかいエッジ10は、円形コーン型振動板8の高域限界周波数fhよりも低い周波数において分割振動を始めるため、エッジ10から放射される音波にはピークディップが出現する。   Since the speaker 1 of the present embodiment is a small electrodynamic speaker provided with the circular cone type diaphragm 8 having a diameter of 10 cm, the surface area of the edge 10 is relative to the surface area of the circular cone type diaphragm 8. Big. That is, in such a small electrodynamic speaker, the ratio of the edge 10 is increased while the ratio of the circular cone diaphragm 8 to the entire effective area of the speaker vibration system is decreased. Therefore, the material and shape of the edge 10 affect the sound pressure frequency characteristics of the sound to be reproduced and the sound wave radiated from the entire vibration system. The soft edge 10 having a lower rigidity than the circular cone diaphragm 8 starts to divide at a frequency lower than the high frequency limit frequency fh of the circular cone diaphragm 8, so that the sound wave radiated from the edge 10 includes A peak dip appears.

図3〜図5は、本実施例のエッジ10を含む円形コーン型振動板8を備えるスピーカー1の軸上1m音圧周波数特性を表すグラフである。実線は、円形コーン型振動板8およびエッジ10を含む全ての振動系から放射される音波による音圧周波数特性であり、一方、破線は、振動系のうちでエッジ10のみから放射される音波による音圧周波数特性である。本実施例の場合には、円形コーン型振動板8の高域限界周波数fhは、約4kHz付近のピークとして現れ、それ以上の周波数帯域では激しく分割振動している。一方、エッジ10は、fhよりも更に低い周波数である200Hzで分割振動を始めており、エッジ10から放射される音波による破線で示す音圧周波数特性には、6kHzの範囲まで大きなピークディップが出現する。特に、1kHz〜4kHzの周波数帯域において、ピークディップが少ない平坦な特性が得られるのが好ましく、その場合には、スピーカー1は、異音を生じる等の不良が生じにくく、好ましい音声再生が可能になる。   3 to 5 are graphs showing on-axis 1 m sound pressure frequency characteristics of the speaker 1 including the circular cone-shaped diaphragm 8 including the edge 10 of the present embodiment. The solid line is the sound pressure frequency characteristic due to the sound wave radiated from all the vibration systems including the circular cone diaphragm 8 and the edge 10, while the broken line is due to the sound wave radiated only from the edge 10 in the vibration system. Sound pressure frequency characteristics. In the case of the present embodiment, the high-frequency limit frequency fh of the circular cone diaphragm 8 appears as a peak around about 4 kHz, and vibrates in a divided manner in a frequency band higher than that. On the other hand, the edge 10 starts dividing vibration at 200 Hz, which is a frequency lower than fh, and a large peak dip appears up to a range of 6 kHz in the sound pressure frequency characteristic indicated by the broken line by the sound wave radiated from the edge 10. . In particular, it is preferable that a flat characteristic with less peak dip is obtained in the frequency band of 1 kHz to 4 kHz. In this case, the speaker 1 is less prone to defects such as abnormal noise, and preferable audio reproduction is possible. Become.

図3は、上記の本実施例のエッジ10であって、ロール頂部の山部15a、15bおよび谷部16aの厚みt1が0.3mmであり、連結部17a〜17dの厚みt2が0.5mmの場合の音圧周波数特性のグラフである。本実施例のエッジ10では、可動部13のロール頂部の厚みt1は、いずれの連結部17の厚みt2の60%である。破線で示す音圧周波数特性の1kHz〜4kHzの周波数帯域を見ると、エッジ10から放射される音波によるピークディップが少なく、平坦な特性が得られていることが分かる。また、振幅の大きい入力信号がボイスコイルに印加された場合であっても、異音を生じる等の不良が生じにくい。   FIG. 3 shows the edge 10 of the above-described embodiment, in which the thicknesses t1 of the crest portions 15a and 15b and the trough portion 16a at the top of the roll are 0.3 mm, and the thickness t2 of the connecting portions 17a to 17d is 0.5 mm. It is a graph of the sound pressure frequency characteristic in the case of. In the edge 10 of the present embodiment, the thickness t1 of the roll top portion of the movable portion 13 is 60% of the thickness t2 of any connecting portion 17. When the frequency band of 1 kHz to 4 kHz of the sound pressure frequency characteristic indicated by the broken line is viewed, it can be seen that a flat characteristic is obtained with little peak dip due to the sound wave radiated from the edge 10. Further, even when an input signal having a large amplitude is applied to the voice coil, defects such as abnormal noise are unlikely to occur.

図4は、ロール頂部の山部15a、15bおよび谷部16aの厚みt1が0.2mmであることを除いて、先の実施例1とほぼ同一の構成を有する他の実施例のエッジ10aの場合の音圧周波数特性のグラフである。本実施例のエッジ10aでは、可動部13のロール頂部の厚みt1は、いずれの連結部17の厚みt2の40%である。先の実施例の場合と同様に、破線で示す音圧周波数特性の1kHz〜4kHzの周波数帯域を見ると、エッジ10aから放射される音波によるピークディップが少なく、平坦な特性が得られていることが分かる。また、振幅の大きい入力信号がボイスコイルに印加された場合であっても、異音を生じる等の不良が生じにくい。   FIG. 4 shows the edge 10a of another embodiment having substantially the same configuration as that of the first embodiment except that the thicknesses t1 of the crest portions 15a and 15b and the trough portion 16a of the roll top portion are 0.2 mm. It is a graph of the sound pressure frequency characteristic in the case. In the edge 10a of the present embodiment, the thickness t1 of the roll top portion of the movable portion 13 is 40% of the thickness t2 of any connecting portion 17. As in the case of the previous embodiment, when the frequency band of 1 kHz to 4 kHz of the sound pressure frequency characteristic indicated by the broken line is viewed, there is little peak dip due to the sound wave radiated from the edge 10a, and a flat characteristic is obtained. I understand. Further, even when an input signal having a large amplitude is applied to the voice coil, defects such as abnormal noise are unlikely to occur.

図5は、ロール頂部の谷部16aの位置が、先の実施例1のエッジ10のロール頂部の谷部16aの場合の0.2mm下の位置にあることを除いて、先の実施例1とほぼ同一の構成を有する他の実施例のエッジ10bの場合の音圧周波数特性のグラフである。つまり、本実施例のエッジ10bは、可動部13のギャザーの谷部16aが、先の実施例1のエッジ10からわずかに深くなったエッジであり、谷部16aの位置は、可動部13の内周端部13aおよび外周端部13bが位置する先述の同一平面19上に位置する場合に含まれる。先の実施例の場合と同様に、破線で示す音圧周波数特性の1kHz〜4kHzの周波数帯域を見ると、エッジ10bから放射される音波によるピークディップが少なく、平坦な特性が得られていることが分かる。また、振幅の大きい入力信号がボイスコイルに印加された場合であっても、異音を生じる等の不良が生じにくい。   FIG. 5 shows the first embodiment except that the position of the valley 16a at the top of the roll is at a position 0.2 mm below the valley 16a at the top of the roll of the edge 10 of the first embodiment. It is a graph of the sound pressure frequency characteristic in the case of the edge 10b of the other Example which has the structure substantially the same as this. That is, the edge 10b of the present embodiment is an edge where the gathered valley portion 16a of the movable portion 13 is slightly deeper than the edge 10 of the first embodiment, and the position of the valley portion 16a is the position of the movable portion 13. It is included when the inner peripheral end 13a and the outer peripheral end 13b are located on the same plane 19 as described above. As in the case of the previous embodiment, when the frequency band of 1 kHz to 4 kHz of the sound pressure frequency characteristic indicated by the broken line is viewed, there is little peak dip due to the sound wave radiated from the edge 10b, and a flat characteristic is obtained. I understand. Further, even when an input signal having a large amplitude is applied to the voice coil, defects such as abnormal noise are unlikely to occur.

次に、(図示しない)比較例のエッジ20について説明する。比較例のエッジ20は、実施例のエッジ10、10a、10bと比較するために、内周接合部、外周接合部、可動部という基本的な構成、形状、寸法をほぼ同一にしているエッジであり、相違点として、可動部の厚みt0が、ロール頂部の山部および谷部、そして、連結部の何れにおいても一定(0.4mm)であるエッジである。すなわち、比較例のエッジ20では、可動部13のロール頂部の厚みt1は、いずれの連結部17の厚みt2の100%であり、可動部13のロール頂部の厚みは薄くなっていない。   Next, the edge 20 of the comparative example (not shown) will be described. The edge 20 of the comparative example is an edge that has substantially the same basic configuration, shape, and dimensions of an inner peripheral joint, an outer peripheral joint, and a movable part in order to compare with the edges 10, 10a, and 10b of the embodiment. There is an edge where the thickness t0 of the movable part is constant (0.4 mm) in any of the peak and valley parts of the roll top part and the connecting part. That is, at the edge 20 of the comparative example, the thickness t1 of the roll top of the movable portion 13 is 100% of the thickness t2 of any of the connecting portions 17, and the thickness of the roll top of the movable portion 13 is not thin.

図6は、この比較例のエッジ20の場合の音圧周波数特性のグラフである。先の実施例の場合と同様に、破線で示す音圧周波数特性の1kHz〜4kHzの周波数帯域を見ると、エッジ20から放射される音波によるピークディップは大きくなり、特に2kHz付近に大きなピークが、そして、3kHz付近に大きなディップが出現する。また、その結果、実線に示すエッジ20を含む全ての振動系から放射される音波による2kHz付近の音圧周波数特性に、ディップを生じさせてしまっている。   FIG. 6 is a graph of sound pressure frequency characteristics in the case of the edge 20 of this comparative example. As in the case of the previous embodiment, when looking at the frequency band of 1 kHz to 4 kHz of the sound pressure frequency characteristic indicated by the broken line, the peak dip due to the sound wave radiated from the edge 20 becomes large, and a large peak particularly in the vicinity of 2 kHz A large dip appears around 3 kHz. As a result, a dip is caused in the sound pressure frequency characteristic around 2 kHz by sound waves radiated from all vibration systems including the edge 20 shown by the solid line.

また、(図示しない)他の比較例のエッジ20aについて説明する。この比較例のエッジ20aも、先の実施例および比較例と比較するために、内周接合部、外周接合部、可動部という基本的な構成、形状、寸法をほぼ同一にしているものであり、相違点として、可動部のロール頂部の一つの谷部の厚みのみが薄くされ(0.3mm)、他のロール頂部の山部と、連結部の何れにおいても一定(0.5mm)であるエッジである。すなわち、比較例のエッジ20aが実施例1のエッジ10との相違するのは、可動部13の山部15aおよび15bのロール頂部の厚みt1が、0.3mmから連結部17の厚みt2と同じ0.5mmにされている点であり、実質的に薄くされているロール頂部は、谷部のみである。   Further, the edge 20a of another comparative example (not shown) will be described. The edge 20a of this comparative example also has the same basic configuration, shape, and dimensions of an inner peripheral joint, an outer peripheral joint, and a movable part in order to compare with the previous examples and comparative examples. As a difference, only the thickness of one trough at the top of the roll of the movable part is reduced (0.3 mm), and it is constant (0.5 mm) at any of the top of the other roll and the connecting part. It is an edge. That is, the edge 20a of the comparative example is different from the edge 10 of the first embodiment because the thickness t1 of the roll tops of the crests 15a and 15b of the movable portion 13 is the same as the thickness t2 of the connecting portion 17 from 0.3 mm. The top of the roll, which is a point that is 0.5 mm and is substantially thinned, is only the valley.

図7は、この比較例のエッジ20aの場合の音圧周波数特性のグラフである。先の実施例の場合と同様に、破線で示す音圧周波数特性の1kHz〜4kHzの周波数帯域を見ると、エッジ20aから放射される音波によるピークディップはさらに大きくなり、2kHz付近に大きなピークと、3kHz付近に大きなディップが出現する。また、その結果、実線に示すエッジ20aを含む全ての振動系から放射される音波による音圧周波数特性は、平坦ではなく凹凸を示すようになっている。   FIG. 7 is a graph of sound pressure frequency characteristics in the case of the edge 20a of this comparative example. As in the case of the previous embodiment, when the frequency band of 1 kHz to 4 kHz of the sound pressure frequency characteristic indicated by the broken line is seen, the peak dip due to the sound wave radiated from the edge 20a is further increased, and a large peak near 2 kHz, A large dip appears around 3 kHz. As a result, the sound pressure frequency characteristics of sound waves emitted from all vibration systems including the edge 20a shown by the solid line are not flat but uneven.

なお、(図示しない)比較例として、ロール頂部の山部および谷部の厚みt1が0.4mmであり、連結部の厚みt2が0.5mmである場合(可動部のロール頂部の厚みt1は、いずれの連結部の厚みt2の80%である。)には、(図示しない)音圧周波数特性のグラフを参照すると、比較例のエッジから放射される音波によるピークディップが1kHz〜4kHzの周波数帯域に見られ、ロール頂部の山部および谷部の厚みt1を十分に薄くできていないことが分かる。好ましくは、可動部のロール頂部の厚みt1は、いずれの連結部の厚みt2の70%で、40%以上であるとよい。その場合には、振幅の大きい入力信号がボイスコイルに印加された場合であっても、異音を生じる等の不良が生じにくい。   As a comparative example (not shown), when the thickness t1 of the crest and trough of the roll top is 0.4 mm and the thickness t2 of the connecting portion is 0.5 mm (the thickness t1 of the roll top of the movable part is , Which is 80% of the thickness t2 of any connecting portion.) Referring to the graph of the sound pressure frequency characteristic (not shown), the peak dip due to the sound wave radiated from the edge of the comparative example is a frequency of 1 kHz to 4 kHz. It can be seen from the band that the thickness t1 of the crest and trough at the top of the roll is not sufficiently reduced. Preferably, the thickness t1 of the roll top of the movable part is 70% of the thickness t2 of any connecting part, and is preferably 40% or more. In such a case, even when an input signal having a large amplitude is applied to the voice coil, it is difficult to cause defects such as abnormal noise.

また、比較例のエッジ20または20aにおいて、前後振幅変位の対称性と、可動部のギャザーの動きを確認すると、先述の実施例1のエッジ10と比較して、前後振幅変位の対称性は、実施例1のエッジ10の方が優れることが分かる。すなわち、比較例のエッジ20では、1N入力時の前面側への振幅変位は6.74mmであり、後面側への振幅変位の絶対値は7.07mmであり、非対称性を示すこれらの差は0.33mmである。また、10N入力時の前面側への振幅変位は17.34mmであり、後面側への振幅変位の絶対値は18.33mmであり、これらの差は0.99mmである。また、他の比較例のエッジ20aでは、1N入力時の前面側への振幅変位は4.90mmであり、後面側への振幅変位の絶対値は5.19mmであり、非対称性を示すこれらの差は0.29mmである。また、10N入力時の前面側への振幅変位は16.69mmであり、後面側への振幅変位の絶対値は17.50mmであり、これらの差は0.81mmである。つまり、実施例1のエッジ10の場合の方が、同じ静荷重で大きな振幅変位を実現する一方で、前後振幅変位の対称性をも改善している。   Further, in the edge 20 or 20a of the comparative example, when confirming the symmetry of the longitudinal amplitude displacement and the gather movement of the movable part, the symmetry of the longitudinal amplitude displacement is compared with the edge 10 of the above-described first embodiment. It can be seen that the edge 10 of Example 1 is superior. That is, in the edge 20 of the comparative example, the amplitude displacement to the front side at the time of 1N input is 6.74 mm, the absolute value of the amplitude displacement to the rear side is 7.07 mm, and these differences indicating asymmetry are 0.33 mm. In addition, the amplitude displacement toward the front side at the time of 10N input is 17.34 mm, the absolute value of the amplitude displacement toward the rear side is 18.33 mm, and the difference between these is 0.99 mm. Further, in the edge 20a of another comparative example, the amplitude displacement toward the front surface at the time of 1N input is 4.90 mm, and the absolute value of the amplitude displacement toward the rear surface side is 5.19 mm, indicating these asymmetries. The difference is 0.29 mm. In addition, the amplitude displacement toward the front surface at the time of 10N input is 16.69 mm, the absolute value of the amplitude displacement toward the rear surface side is 17.50 mm, and the difference between these is 0.81 mm. That is, in the case of the edge 10 of the first embodiment, a large amplitude displacement is realized with the same static load, while the symmetry of the longitudinal amplitude displacement is also improved.

これは、比較例のエッジ20または20aでは、ギャザーを形成する複数の連結部の剛性に比較して、ロール頂部の山部および谷部の剛性が高く、連結部が構成するギャザーの折れ曲がる角度が十分にならないためである。比較例のエッジ20では、可動部のギャザーの谷部における隣接する連結部が形成する角度は、静止時の角度47.5°から、1N入力(前面側変位)時に89.1°、1N入力(後面側変位)時に91.42°、と開く角度が実施例に比べて小さくなる。同様に、比較例のエッジ20aでも、可動部のギャザーの谷部における隣接する連結部が形成する角度は、静止時の角度47.5°から、1N入力(前面側変位)時に75.6°、1N入力(後面側変位)時に78.2°、と、さらに開く角度が実施例に比べて小さくなる。その結果、比較例のエッジ20もしくはエッジ20aを備える円形コーン型振動板を含むスピーカーの場合には、その振動系が振動して比較例のエッジ20もしくはエッジ20aの可動部が変形する場合に、そのスティフネスは、可動部の内周側と外周側とで大きく異なる。振幅の大きい入力信号がボイスコイルに印加された場合には、異音を生じる等の不良が生じるおそれがある。   This is because the edge 20 or 20a of the comparative example has higher crests and troughs at the top of the roll compared to the rigidity of the plurality of connecting parts forming the gathers, and the angle at which the gathers formed by the connecting parts are bent. This is because it is not enough. In the edge 20 of the comparative example, the angle formed by the adjacent connecting portions in the gather valleys of the movable portion is 89.1 ° at the time of 1N input (front side displacement) from the angle of 47.5 ° at the time of stationary, 1N input. The opening angle is 91.42 ° at the time of (rear surface side displacement), which is smaller than that of the embodiment. Similarly, also in the edge 20a of the comparative example, the angle formed by the adjacent connecting portions in the gathered valleys of the movable portion is from 47.5 ° when stationary to 75.6 ° when 1N input (front side displacement). At 1N input (rear displacement on the rear side), the opening angle is further reduced to 78.2 ° compared to the embodiment. As a result, in the case of a speaker including a circular cone diaphragm having the edge 20 or the edge 20a of the comparative example, when the vibration system vibrates and the movable part of the edge 20 or the edge 20a of the comparative example is deformed, The stiffness differs greatly between the inner peripheral side and the outer peripheral side of the movable part. When an input signal having a large amplitude is applied to the voice coil, there is a possibility that a defect such as an abnormal noise occurs.

もちろん、本発明のスピーカー用エッジは、上記の実施例に限られず、他の断面形状を備えるものであってもよい。口径の大きな大型のスピーカーであっても、スピーカー用エッジの可動部が、断面形状において、複数の山部と谷部とを形成する複数のロール頂部と、隣接する山部と谷部とを連結する複数の連結部と、を含み、内周接合部と、外周接合部と、可動部と、が、弾性材料から一体成形され、複数のロール頂部の厚みt1が、いずれの連結部の厚みt2よりも薄く形成されていればよい。   Of course, the speaker edge of the present invention is not limited to the above-described embodiment, and may have other cross-sectional shapes. Even for a large speaker with a large aperture, the movable part of the speaker edge is connected in cross-section with a plurality of roll tops forming a plurality of peaks and valleys, and adjacent peaks and valleys. A plurality of connecting portions, and an inner peripheral joint portion, an outer peripheral joint portion, and a movable portion are integrally formed from an elastic material, and a thickness t1 of the plurality of roll top portions is a thickness t2 of any connecting portion. What is necessary is just to form thinner than.

また、実施例3のエッジ10bの場合のように、可動部13の内周端部13aおよび外周端部13bが、先述の同一平面19上に位置し、かつ、可動部13の複数のロール頂部のうち谷部16aを形成するロール頂部が、ほぼ全周に渡って同一平面19上に位置すればよい。可動部13のギャザーの谷部16aが、平面19が位置する高さから±0.2mmの範囲で変化しても、前後方向の山部15aと谷部16aとの距離の5.0mmに比べると小さい変化でしかないので、ロールのほぼ同一平面19上に位置すると言え、実施例1〜3の場合と同様に、再生周波数範囲が広く平坦なエッジが実現される。   Further, as in the case of the edge 10b of the third embodiment, the inner peripheral end portion 13a and the outer peripheral end portion 13b of the movable portion 13 are positioned on the same plane 19 as described above, and a plurality of roll top portions of the movable portion 13 are provided. Of these, the roll tops forming the valleys 16a need only be located on the same plane 19 over the entire circumference. Even if the gathering valley 16a of the movable portion 13 changes within a range of ± 0.2 mm from the height at which the flat surface 19 is located, it is compared with the distance of 5.0 mm between the peak 15a and the valley 16a in the front-rear direction. Therefore, it can be said that the roll is positioned on substantially the same plane 19, and a flat edge having a wide reproduction frequency range is realized as in the case of the first to third embodiments.

また、本発明のスピーカー用エッジは、上記実施例の発泡ゴムから一体成形した場合に限定ず、発泡ウレタン等の厚みを変更できる材料であればよい。スピーカー用エッジを形成する弾性材料は、例えば、ゴム、または、エラストマーを射出成形の金型に注入して成型してもよい。また、エラストマーのシートをプレス成型したものであってもよい。   Further, the speaker edge of the present invention is not limited to the case where it is integrally molded from the foamed rubber of the above embodiment, and any material that can change the thickness of foamed urethane or the like may be used. The elastic material forming the speaker edge may be molded by, for example, injecting rubber or elastomer into an injection mold. Alternatively, an elastomer sheet may be press-molded.

また、本発明のスピーカー振動板並びにスピーカーは、上記実施例に限定されない。磁気回路は、本実施例の説明で図示された外磁型磁気回路に限定されるものではなく、内磁型磁気回路でもよく、反発型磁気回路でもよい。また、コーン型振動板は、円形に限られず、楕円形やトラック形のコーン型振動板でもよい。   Further, the speaker diaphragm and the speaker of the present invention are not limited to the above embodiments. The magnetic circuit is not limited to the outer magnet type magnetic circuit illustrated in the description of the present embodiment, and may be an inner magnet type magnetic circuit or a repulsive type magnetic circuit. The cone-type diaphragm is not limited to a circular shape, and may be an elliptical or track-shaped cone-type diaphragm.

本発明のスピーカー用エッジは、家庭用のステレオ再生、もしくはマルチチャンネルサラウンド再生に用いられるスピーカーに限られず、携帯用電子機器や、車載用のオーディオ機器に使用されるスピーカーにも適用が可能である。   The edge for a speaker of the present invention is not limited to a speaker used for home stereo reproduction or multi-channel surround reproduction, but can also be applied to a speaker used for portable electronic devices and in-vehicle audio devices. .

本発明の好ましい実施形態によるスピーカー用エッジを用いたスピーカーについて説明する断面図である。(実施例1)It is sectional drawing explaining the speaker using the edge for speakers by preferable embodiment of this invention. Example 1 本発明の好ましい実施形態によるエッジの半径方向の断面形状を説明する断面図である。(実施例1)It is sectional drawing explaining the cross-sectional shape of the radial direction of the edge by preferable embodiment of this invention. Example 1 本発明の好ましい実施形態によるスピーカーの音圧周波数特性を表すグラフである。(実施例1)4 is a graph showing sound pressure frequency characteristics of a speaker according to a preferred embodiment of the present invention. Example 1 本発明の好ましい実施形態によるスピーカーの音圧周波数特性を表すグラフである。(実施例2)4 is a graph showing sound pressure frequency characteristics of a speaker according to a preferred embodiment of the present invention. (Example 2) 本発明の好ましい実施形態によるスピーカーの音圧周波数特性を表すグラフである。(実施例3)4 is a graph showing sound pressure frequency characteristics of a speaker according to a preferred embodiment of the present invention. (Example 3) 比較例のエッジのスピーカーの音圧周波数特性を表すグラフである。(比較例1)It is a graph showing the sound pressure frequency characteristic of the speaker of the edge of a comparative example. (Comparative Example 1) 比較例のエッジのスピーカーの音圧周波数特性を表すグラフである。(比較例2)It is a graph showing the sound pressure frequency characteristic of the speaker of the edge of a comparative example. (Comparative Example 2)

符号の説明Explanation of symbols

1 スピーカー
2 磁気回路
3 磁気空隙
4 フレーム
5 ボイスコイル
6 ボビン
7 ダンパー
8 コーン型振動板
10、10a、10b スピーカー用エッジ
11 内周接合部
12 外周接合部
13 可動部
14 ガスケット部
15 山部
16 谷部
17 連結部
DESCRIPTION OF SYMBOLS 1 Speaker 2 Magnetic circuit 3 Magnetic space | gap 4 Frame 5 Voice coil 6 Bobbin 7 Damper 8 Cone-type diaphragm 10, 10a, 10b Speaker edge 11 Inner periphery joint part 12 Outer periphery joint part 13 Movable part 14 Gasket part 15 Mountain part 16 Valley Part 17 connecting part

Claims (3)

振動板の外周端部と接合する内周接合部と、フレームと接合する外周接合部と、該内周接合部と該外周接合部との間に形成される可動部と、を備える略環状のスピーカー用エッジであって、
該可動部が、複数の山部と谷部とを形成する複数のロール頂部と、隣接する該山部と該谷部とを連結する複数の連結部と、を含み、
該内周接合部と、該外周接合部と、該可動部と、が、弾性材料から一体成形され、該複数の該ロール頂部の厚みt1が、いずれの該連結部の厚みt2の70%以下に薄く形成されて、該可動部の内周端部と、該可動部の外周端部と、該可動部の該複数のロール頂部のうち該谷部を形成する該ロール頂部とが、同一平面上に位置する、
スピーカー用エッジ。
A substantially annular shape including an inner peripheral joint that is joined to the outer peripheral end of the diaphragm, an outer peripheral joint that is joined to the frame, and a movable part that is formed between the inner peripheral joint and the outer peripheral joint. A speaker edge,
The movable part includes a plurality of roll tops forming a plurality of peaks and valleys, and a plurality of connecting parts connecting the adjacent peaks and valleys,
The inner peripheral joint portion, the outer peripheral joint portion, and the movable portion are integrally formed from an elastic material, and the thickness t1 of the plurality of roll top portions is 70% or less of the thickness t2 of any of the connecting portions. thin is formed on an inner peripheral end portion of the movable portion, and the outer peripheral edge portion of the movable portion, and a said roll top portion forming the valley portions of the roll top of the plurality of movable portions, same plane Located on the
Speaker edge.
請求項1記載の前記スピーカー用エッジと、該スピーカー用エッジの前記内周接合部をその外周端部に接合した振動板と、を備える、スピーカー振動板。 Comprising said loudspeaker edge according to claim 1, a diaphragm formed by joining the inner peripheral joint part of the loudspeaker edge at its outer peripheral end portion, a speaker diaphragm. 請求項に記載の前記スピーカー振動板を備える、スピーカー。
A speaker comprising the speaker diaphragm according to claim 2 .
JP2007218213A 2007-08-24 2007-08-24 Speaker edge, speaker diaphragm and speaker using the same Expired - Fee Related JP4815646B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007218213A JP4815646B2 (en) 2007-08-24 2007-08-24 Speaker edge, speaker diaphragm and speaker using the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007218213A JP4815646B2 (en) 2007-08-24 2007-08-24 Speaker edge, speaker diaphragm and speaker using the same

Publications (2)

Publication Number Publication Date
JP2009055177A JP2009055177A (en) 2009-03-12
JP4815646B2 true JP4815646B2 (en) 2011-11-16

Family

ID=40505867

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2007218213A Expired - Fee Related JP4815646B2 (en) 2007-08-24 2007-08-24 Speaker edge, speaker diaphragm and speaker using the same

Country Status (1)

Country Link
JP (1) JP4815646B2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2432252B1 (en) * 2009-05-12 2016-05-25 Panasonic Intellectual Property Management Co., Ltd. Speaker and portable electronic device
JP2012119933A (en) * 2010-11-30 2012-06-21 Pioneer Electronic Corp Speaker device
KR101543577B1 (en) * 2015-05-01 2015-08-11 주식회사 영진하이텍 Receiver having diaphragm built pattern circuit and integrated edge unit
CN108609573A (en) * 2016-12-12 2018-10-02 中芯国际集成电路制造(上海)有限公司 A kind of MEMS device and preparation method thereof, electronic device
KR102562169B1 (en) * 2021-03-23 2023-08-02 주식회사 이엠텍 Injection-molded diaphragm of microspeaker

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2995454B2 (en) * 1995-11-30 1999-12-27 ミネベア株式会社 Center holding member for speaker and method of manufacturing the same
JP3992876B2 (en) * 1998-05-08 2007-10-17 松下電器産業株式会社 Speaker
JP2005223806A (en) * 2004-02-09 2005-08-18 Pioneer Electronic Corp Diaphragm, manufacturing method thereof, and speaker device

Also Published As

Publication number Publication date
JP2009055177A (en) 2009-03-12

Similar Documents

Publication Publication Date Title
US8199962B2 (en) Loudspeaker diaphragm and loudspeaker using the same
US7428946B2 (en) Suspension and electro-acoustic transducer using the suspension
US10182294B2 (en) Electroacoustic transducer
JP4815646B2 (en) Speaker edge, speaker diaphragm and speaker using the same
US20080159583A1 (en) Speaker
US8213671B2 (en) Speaker
US20170085979A1 (en) Electroacoustic Transducer
JP2009201005A (en) Motor-driven type speaker
JP6482004B2 (en) Speaker
US8532327B2 (en) Diaphragm and speaker device provided with the same
JP2011166722A (en) Loudspeaker
JP5493583B2 (en) Speaker edge
JP2007502040A (en) Shallow loudspeaker
JP6194741B2 (en) Electrodynamic speaker
JP2007043522A (en) Diaphragm for speaker device
JP6861379B2 (en) Diaphragm for speaker and speaker using it
JP4461489B2 (en) Speaker edge, speaker diaphragm and speaker using the same
JP4560372B2 (en) Speaker device
JP2015109578A (en) Electroacoustic transducer
JP2010063080A (en) Electrodynamic type loudspeaker
JPH10322795A (en) Speaker device
JP7141906B2 (en) Diaphragms and loudspeakers for loudspeakers
US20170318391A1 (en) Diaphragm for speaker apparatus
JP4596969B2 (en) Diaphragm and speaker unit using the same
JP2009267875A (en) Dust cap, and motor-driven speaker employing the same

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20100706

A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A712

Effective date: 20101227

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20110222

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110506

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110609

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20110801

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20110814

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140909

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

LAPS Cancellation because of no payment of annual fees