EP0876079A1 - Electroacoustic transducer - Google Patents

Electroacoustic transducer Download PDF

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Publication number
EP0876079A1
EP0876079A1 EP98890123A EP98890123A EP0876079A1 EP 0876079 A1 EP0876079 A1 EP 0876079A1 EP 98890123 A EP98890123 A EP 98890123A EP 98890123 A EP98890123 A EP 98890123A EP 0876079 A1 EP0876079 A1 EP 0876079A1
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EP
European Patent Office
Prior art keywords
membrane
coil
area
electroacoustic transducer
annular
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Granted
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EP98890123A
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German (de)
French (fr)
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EP0876079B1 (en
Inventor
Gino Dipl.Ing. Pavlovic
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AKG Acoustics GmbH
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AKG Acoustics GmbH
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Publication of EP0876079A1 publication Critical patent/EP0876079A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/046—Construction

Definitions

  • Electroacoustic transducers based on the electrodynamic Working principle, have a membrane that with a coil is connected. The coil protrudes into the ring-shaped Slot between the poles of a magnet and the Converting acoustic or electrical energy vice versa, is done by the movement of the coil.
  • the invention aims to remedy this and a Specify solution without using a bobbin gets along, but still allowed the coil further away from to arrange the actual membrane level and so better in Position magnetic yoke.
  • this is done in that the membrane in the area of the coil an annular extension in one piece molded with it on which the coil in attached desired distance from the membrane, preferred is glued.
  • the assembly is preferably on the front side Front, in contrast to conventional, specially made Coil carriers that hold the coil on its outer surface carry.
  • the membrane has in the area of the coil an annular bead on which the coil is fitted, is preferably glued.
  • This invention is based on the knowledge that it Deep-drawing process is possible to deform the membrane in such a way that a coil support is made in one piece from the membrane material molded in the manufacture of the membrane can be. Because this formation in the same tool and in the same operation as the membrane shaping there are no tolerance or adjustment problems, there is no longer any need for your own coil support part and the attachment of the coil to the trained according to the invention The process is as unproblematic as in the past Assembly of the coil directly on the membrane without use a bobbin.
  • Another advantage is the lack of an additional one vibrating mass, as has always been the coil former has formed, which is particularly the case with the implementation high frequencies has a positive effect.
  • Fig. 1 is in a capsule from upper part 1 and lower part 2, a magnet 3 and a two-part yoke 4, 5 provided. It is also provided a membrane 6, usually with its circular Edge clamped between the capsule halves 1, 2 or in is glued to this area and into an edge area 7 and a central area 8 can be subdivided.
  • the central part 8 is actually the essential part of the membrane and along the circumference of this central area 8 a coil 9 is mounted, usually glued on.
  • the magnetic field between the mutually facing lateral surface of the yoke parts 4, 5 of the magnet 3 practically homogeneous if one except that the circumference of the outer yoke part is larger than the circumference of the inner yoke part, so that the magnetic field lines are radial and not parallel run to each other, but considering the small number relative differences in length is negligible.
  • the membrane 6 is now a To give shape, as shown in Fig. 5 or 6, in which the transition area between the bead region 7 and the dome region 8 axially downwards (towards the magnet system) is pulled, whereby a serving as a coil carrier in approximately annular extension 11 is formed.
  • This extension can, as shown in Fig. 5, from a cylindrical section may exist is thick-walled than the other membrane areas or but it can, as shown in Fig. 6, in axial section be groove-shaped.
  • a groove-shaped formation is obtained, for example, with 7, in which a blank of Membrane 6 by applying pressure and in most Cases also by thermal treatment in the deep-drawing process is drawn over a form 12.
  • the height 1 of the form extension determines the height of the bobbin 11.
  • the film 5 can be used a form that is later based on the Magnet system facing side of the film 6 arranged is, film material accordingly in a recess this shape is pressed. This can be particularly the case with well thermoformable film material can be used. It is in this case also possible instead of the excess gas pressure a die on the side of the film facing away from the mold to use.
  • a material for the film for example Polycarbonate, polyetherester urethane or PETP film, for example called Mylar.
  • extension 11th not along the entire circumference of the dome area 8 takes place, but that continuous bridges 13 between the Beading area 7 and the dome area 8 remain what especially in the formation of the extension Fig. 6 can be cheap.
  • the only slight gap Forming interruption of the extension 11 interferes with the application and sticking the plunger 9 not.
  • the invention is for those currently common in this field and applicable materials known to those skilled in the art, and of course those skilled in the art use such membrane materials 6 preferred, which has a distinctly favorable deep-drawing behavior have to do this without manufacturing problems the greatest possible height 1 of the annular extension 11 to achieve.
  • the invention is not based on the exemplary embodiment shown limited, but can be modified in various ways will. So the end face of the integrated Coil carrier on which the coil is attached, one have special geometry, for example a gradation, to make assembly easier. It can be the specialist with knowledge of the invention also the specified materials replace with others that are more familiar to him.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

Abstract

The electroacoustic transducer has a membrane (8) attached to a coil which is located within an annular gap between the poles of a magnet.The membrane has an integral ring projection (11) in the vicinity of the coil, which is adhered to the end face of this projection. The annular projection may be provided with a number of slits spaced around its periphery, e.g. at 90 degree spacings, the membrane having a central convex area on the inside of the annular projection and an annular area with a convex cross-section on the outside of the annular projection.

Description

Elektroakustische Wandler, die nach dem elektrodynamischen Prinzip funktionieren, weisen eine Membrane auf, die mit einer Spule verbunden ist. Die Spule ragt in den ringförmigen Schlitz zwischen den Polen eines Magneten und die Umformung von akustischer in elektrischer Energie oder auch umgekehrt, erfolgt durch die Bewegung der Spule.Electroacoustic transducers based on the electrodynamic Working principle, have a membrane that with a coil is connected. The coil protrudes into the ring-shaped Slot between the poles of a magnet and the Converting acoustic or electrical energy vice versa, is done by the movement of the coil.

Um hier zu einem hohen Wirkungsgrad und guter Qualität bezüglich eines niedrigen Klirrfaktors zu kommen, ist es anzustreben, daß die Bewegung der Spule in einem Bereich des Magnetfeldes stattfindet, in dem es eine möglichst maximale Intensität und gute Linearität aufweist, somit im Luftspalt des Magnetjoches selbst.To achieve high efficiency and good quality it comes to a low distortion factor aim for that movement of the coil in one area of the magnetic field takes place in which there is one if possible has maximum intensity and good linearity, thus in Air gap of the magnetic yoke itself.

Eine andere Forderung, die an die Membrane bzw. deren Umfeld zu richten ist, ist, daß die Membrane sich innerhalb einer möglichst großen Amplitude frei bewegen soll, ohne an irgendwelchen Bauteilen anzustoßen. Diese Forderung erweist sich zur ersten Forderung als kontradiktorisch, da die Spule ja auf der Membrane sitzt und damit auch das Joch des Magneten nahe zur Membrane hin gelegt werden muß, was aber wiederum die Bewgungsfreiheit der Membran in Richtung des Magneten empfindlich begrenzt.Another requirement that applies to the membrane or its What needs to be addressed is that the membrane is inside with the largest possible amplitude, without bumping on any components. This requirement turns out to be contradictory to the first claim, since the coil sits on the membrane and so the yoke of the magnet is also placed close to the membrane must be, but what in turn the freedom of movement of the Membrane deliberately limited in the direction of the magnet.

Um diesem Übelstand abzuhelfen, ist es im Stand der Technik bekanntgeworden, auf die Membrane einen Spulenträger zu kleben, der im wesentlichen die Form eines zylindrischen Mantels und einer Klebekante zur Verklebung mit der Membrane aufweist. Im Abstand von der Membrane wird sodann die Spule an den Spulenträger geklebt, so daß die Membrane einen größeren Abstand vom Magneten aufweisen kann und doch die Spule sich in der bestmöglichen Position im Magnetjoch befindet. So bestechend diese Lösung auf den ersten Blick aussieht, so schwierig ist sie zu verwirklichen: Es wird ein weiterer Bauteil, nämlich der Spulenträger benötigt. Dieser Spulenträger muß an die Membrane angeklebt werden, was zu Handhabungsproblemen führt, da ja die Membrane ein empfindliches Häutchen ist, übliche Stärken von Membranen liegen in der Größenordnung von 40 Mikrometer und oft auch darunter, und was es in der Folge notwendig macht, die Spule am Membranenträger anzubringen, was ebenfalls äußerst problematisch ist, da eine Fixierung des Membranenträgers nicht einfach vorzunehmen ist. Zu all dem kommen noch die Toleranz- und Justierprobleme durch den zusätzlichen Bauteil, die nicht außer acht gelassen werden dürfen.To remedy this problem, it is state of the art became known on the membrane a coil former to stick, which is essentially the shape of a cylindrical Jacket and an adhesive edge for gluing with the Has membrane. The distance from the membrane is then the coil is glued to the coil carrier so that the membrane can have a greater distance from the magnet and but the coil is in the best possible position in the Magnet yoke is located. So captivating this solution on the looks like it is so difficult to achieve: It becomes another component, namely the coil carrier needed. This coil support must be attached to the membrane be glued, which leads to handling problems, since the membrane is a delicate cuticle, usual The strengths of membranes are on the order of 40 Micrometers and often below, and what it does in the episode makes it necessary to attach the coil to the membrane carrier, which is also extremely problematic because of a fixation membrane carrier is not easy to make. To all the tolerance and adjustment problems still come through the additional component that was not neglected may be.

All diese Probleme treten bei einem Produkt auf, das üblicherweise mit hoher Taktgeschwindigkeit gefertigt wird, Taktgeschwindigkeiten von 6 Sekunden pro Arbeitsgang sind durchaus üblich, was an die verwendeten Vorrichtungen hohe Anforderungen stellt.All of these problems occur with a product that usually manufactured at high clock speeds clock speeds of 6 seconds per operation are quite common, what about the devices used makes high demands.

Werden hingegen kleinere Serien gefertigt, kommen die Probleme beim Aufkleben, insbesondere des Spulenträgers an der Membran voll zum Tragen, da es nahezu ausgeschlossen ist, die winzigen zur Verfügung stehenden Klebeflächen ausreichend fehlerfrei mit Klebstoff zu versehen.If, on the other hand, smaller series are produced, the problems arise when sticking on, especially the coil carrier the membrane fully to bear as it is almost impossible is the tiny adhesive surface available to be adequately flawlessly provided with adhesive.

Die Erfindung bezweckt hier Abhilfe zu schaffen und eine Lösung anzugeben, die ohne die Verwendung eines Spulenträgers auskommt, aber doch erlaubt, die Spule weiter weg von der eigentlichen Membranebene anzuordnen und so besser im Magnetjoch zu positionieren.The invention aims to remedy this and a Specify solution without using a bobbin gets along, but still allowed the coil further away from to arrange the actual membrane level and so better in Position magnetic yoke.

Erfindungsgemäß geschieht dies dadurch, daß die Membrane im Bereich der Spule einen ringförmigen Fortsatz einstückig mit ihr ausgeformt aufweist, an dem die Spule im gewünschten Abstand von der Membrane befestigt, bevorzugt verklebt wird. Die Montage erfolgt bevorzugt Stirnseite zu Stirnseite, im Gegensatz zu herkömmlichen, extra angefertigten Spulenträgern, die die Spule auf ihrer äußeren Mantelfläche tragen.According to the invention, this is done in that the membrane in the area of the coil an annular extension in one piece molded with it on which the coil in attached desired distance from the membrane, preferred is glued. The assembly is preferably on the front side Front, in contrast to conventional, specially made Coil carriers that hold the coil on its outer surface carry.

In einer Variante weist die Membrane im Bereich der Spule eine ringförmige Sicke auf, auf die die Spule passend montiert, bevorzugt verklebt wird.In one variant, the membrane has in the area of the coil an annular bead on which the coil is fitted, is preferably glued.

Diese Erfindung beruht auf der Erkenntnis, daß es im Tiefziehverfahren möglich ist, die Membrane so zu verformen, daß ein Spulenträger einstückig aus dem Membranenmaterial bei der Herstellung der Membrane gleich mit ausgeformt werden kann. Da diese Ausformung im selben Werkzeug und im selben Arbeitsgang wie die Ausformung der Membrane erfolgt, gibt es keinerlei Toleranz- oder Justierprobleme, es entfällt der bisher notwendige eigene Spulenträgerteil und die Befestigung der Spule am erfindungsgemäß ausgebildeten Fortsatz ist so unproblematisch wie bisher bei der Montage der Spule direkt an der Membrane ohne Verwendung eines Spulenträgers.This invention is based on the knowledge that it Deep-drawing process is possible to deform the membrane in such a way that a coil support is made in one piece from the membrane material molded in the manufacture of the membrane can be. Because this formation in the same tool and in the same operation as the membrane shaping there are no tolerance or adjustment problems, there is no longer any need for your own coil support part and the attachment of the coil to the trained according to the invention The process is as unproblematic as in the past Assembly of the coil directly on the membrane without use a bobbin.

Als weiterer Vorteil ist das Fehlen einer zusätzlich schwingenden Masse, wie sie der Spulenträger bisher immer gebildet hat, entfällt, was sich besonders bei der Umsetzung hoher Frequenzen positiv auswirkt.Another advantage is the lack of an additional one vibrating mass, as has always been the coil former has formed, which is particularly the case with the implementation high frequencies has a positive effect.

Die Erfindung wird im folgenden an Hand der Zeichnung näher erläutert. Dabei zeigt

  • die Fig. 1 einen elektrodynamischen Wandler gemäß dem Stand der Technik in schematischer Ansicht im Schnitt,
  • die Fig. 2 die magnetischen Bestandteile des Wandlers der Fig. 1 in einem schematischen Schnitt,
  • die Fig. 3 einen Ausschnitt aus der Fig. 1 in größerem Maßstab,
  • die Fig. 4 einen Ausschnitt gemäß der Fig. 3 mit einer auf einem Spulenträger montierten Spule gemäß dem Stand der Technik,
  • die Fig. 5 eine erfindungsgemäße Membrane im Schnitt,
  • die Fig. 6 eine Variante einer erfindungsgemäßen Membrane im Schnitt,
  • die Fig. 7 ein für die Herstellung einer erfindungsgemäßen Membran gemäß Fig. 6 verwendbare Form und
  • die Fig. 8 eine erfindungsgemäße Variante einer Membrane in Draufsicht.
    • The invention is explained below with reference to the drawing. It shows
  • 1 shows an electrodynamic converter according to the prior art in a schematic view in section,
  • 2 shows the magnetic components of the transducer of FIG. 1 in a schematic section,
  • 3 shows a detail from FIG. 1 on a larger scale,
  • 4 shows a detail according to FIG. 3 with a coil according to the prior art mounted on a coil carrier,
  • 5 shows a membrane according to the invention in section,
  • 6 shows a variant of a membrane according to the invention in section,
  • FIG. 7 shows a shape that can be used for the production of a membrane according to the invention according to FIG. 6 and
  • 8 shows a variant of a membrane according to the invention in plan view.

    • Wie aus Fig. 1 ersichtlich, ist in einer Kapsel, bestehend aus Oberteil 1 und Unterteil 2, ein Magnet 3 und ein zweiteiliges Joch 4, 5 vorgesehen. Weiters vorgesehen ist eine Membrane 6, die üblicherweise mit ihrem kreisförmigen Rand zwischen den Kapselhälften 1, 2 eingeklemmt oder in diesem Bereich angeklebt ist und in einen Randbereich 7 und einen Zentralbereich 8 unterteilbar ist. Der Zentralteil 8 ist der eigentlich wesentliche Teil der Membran und entlang des Umfanges dieses Zentralbereiches 8 ist eine Spule 9 montiert, üblicherweise aufgeklebt.As can be seen from Fig. 1, is in a capsule from upper part 1 and lower part 2, a magnet 3 and a two-part yoke 4, 5 provided. It is also provided a membrane 6, usually with its circular Edge clamped between the capsule halves 1, 2 or in is glued to this area and into an edge area 7 and a central area 8 can be subdivided. The central part 8 is actually the essential part of the membrane and along the circumference of this central area 8 a coil 9 is mounted, usually glued on.

    Im Falle eines Mikrofons wird durch die auftreffenden Schallwellen die Membrane 6 bewegt, bewegt damit die Spule 9 im Schlitz des Joches 4, 5 und induziert damit in den Spulenwindungen eine Spannung, die in der Folge abgeleitet und ausgewertet oder verwendet wird. Im Falle eines Kopfhörers oder Lautsprechers wird durch das Fließen des Stromes in der Spule 9 die Membrane 6 in Schwingungen versetzt und es werden Töne abgestrahlt.In the case of a microphone, it is hit by the Sound waves moves the membrane 6, thus moving the coil 9 in the slot of the yoke 4, 5 and thus induced in the Coil turns a voltage that is subsequently derived and evaluated or used. In the case of headphones or speaker is caused by the flow of electricity in the coil 9, the membrane 6 vibrated and sounds are emitted.

    Wie aus Fig. 2 ersichtlich ist, ist das magnetische Feld zwischen den einander zugewandten Mantelfläche der Jochteile 4, 5 des Magneten 3 praktisch homogen, wenn man davon absieht, daß der Umfang des äußeren Jochteiles größer ist als der Umfang des inneren Jochteiles, so daß die magnetischen Feldlinien radial und nicht parallel zueinander verlaufen, was aber in Anbetracht der geringen relativen Längenunterschiede vernachlässigbar ist. As can be seen from Fig. 2, the magnetic field between the mutually facing lateral surface of the yoke parts 4, 5 of the magnet 3 practically homogeneous if one except that the circumference of the outer yoke part is larger than the circumference of the inner yoke part, so that the magnetic field lines are radial and not parallel run to each other, but considering the small number relative differences in length is negligible.

    Im Bereich oberhalb und unterhalb der Mantelflächen sind die Feldlinien auch in axialer Richtung gebogen und das Feld ist somit hochgradig inhomogen.In the area above and below the lateral surfaces the field lines are also bent in the axial direction and that The field is therefore highly inhomogeneous.

    Wie aus Fig. 3 zu entnehmen ist, ist es notwendig, der Spule 9 eine axiale Länge zu verleihen, die einerseits die gesamten Amplitudenbereiche der Bewegung der Membrane 6 abdeckt und darüberhinaus auch noch den an sich toten Raum, der als Ruheabstand zwischen der Membrane und dem membranseitigen Ende des magnetischen Joches 4, 5 auftritt.As can be seen from Fig. 3, it is necessary to To give coil 9 an axial length that the one hand entire amplitude ranges of the movement of the membrane 6 covers and also the dead person Space, which is the resting distance between the membrane and the membrane-side end of the magnetic yoke 4, 5 occurs.

    Diese aus dem Stand der Technik bekannte Anordnung hat den Nachteil, daß sich ein großer Teil der Tauchspule 9 stets im Bereich des inhomogenen Magnetfeldes bewegt, was zu Verzerrungen der Übertragung und einem niedrigen Wirkungsgrad führt, unabhängig davon, ob es sich um ein Mikrofon oder eine Kopfhörerkapsel handelt.This arrangement known from the prior art has the Disadvantage that a large part of the moving coil 9 always in the area of the inhomogeneous magnetic field, which leads to Transmission distortion and low efficiency performs regardless of whether it is a microphone or a headphone capsule.

    Um hier Abhilfe zu schaffen, ist es aus dem Stand der Technik gemäß Fig. 4 bekannt, bei einer Membrane 6 am Übergang zwischen dem Sickenbereich 7 und dem Kuppelbereich 8 einen zylindrischen Spulenträger 10 anzukleben, auf dessen Mantelfläche die Spule 9 ihrerseits aufgeklebt ist. Die Handhabung des Spulenträgers 10, dessen Verbinden mit der Membrane 6 und schließlich das Ankleben der Spule 9 am Spulenträger 10 ist mit den im einleitenden Teil der Beschreibung verbunden Nachteilen verknüpft.To remedy this, it is from the state of the 4 known in a membrane 6 am Transition between the bead area 7 and the dome area 8 to glue a cylindrical coil support 10, on the outer surface of the coil 9 in turn glued is. The handling of the bobbin 10, its connection with the membrane 6 and finally sticking the coil 9 on the bobbin 10 with the in the introductory part Description linked disadvantages linked.

    Dazu kommt noch die Masse des Spulenträgers 10, die zu einer Verschlechterung der Übertragungseigenschaften im Hochfrequenzbereich führt. Im Gegensatz dazu erlaubt es die Erfindung, ohne eine derartige, zusätzliche Masse auszukommen, wodurch dieser Nachteil vorbekannter Lösungen vermieden wird. In addition, there is the mass of the coil carrier 10, which a deterioration in the transmission properties in the High frequency range leads. In contrast, it allows the invention without having to do with such an additional mass, which eliminates this disadvantage of previously known solutions is avoided.

    Erfindungsgemäß ist nun vorgesehen, der Membrane 6 eine Form, wie in Fig. 5 oder 6 dargestellt, zu verleihen, in dem der Übergangsbereich zwischen der Sickenregion 7 und der Kuppelregion 8 axial nach unten (zum Magnetsystem hin) gezogen wird, wodurch ein als Spulenträger dienender in etwa ringförmiger Fortsatz 11 entsteht.According to the invention, the membrane 6 is now a To give shape, as shown in Fig. 5 or 6, in which the transition area between the bead region 7 and the dome region 8 axially downwards (towards the magnet system) is pulled, whereby a serving as a coil carrier in approximately annular extension 11 is formed.

    Dieser Fortsatz kann, wie in Fig. 5 dargestellt, aus einem zylindrischen Abschnitt bestehen, der unter Umständen dickwandiger ist, als die anderen Membranenbereiche oder aber er kann, wie in Fig. 6 dargestellt, im Axialschnitt nutenförmig ausgebildet sein.This extension can, as shown in Fig. 5, from a cylindrical section may exist is thick-walled than the other membrane areas or but it can, as shown in Fig. 6, in axial section be groove-shaped.

    Eine nutenförmige Ausbildung erhält man beispielsweise mit einem Formwerkzeug gemäß Fig. 7, bei dem ein Rohling der Membrane 6 durch Aufbringen von Druck und in den meisten Fällen auch durch thermische Behandlung im Tiefziehverfahren über eine Form 12 gezogen wird. Die Höhe 1 des Formfortsatzes bestimmt die Höhe des Spulenträgers 11.A groove-shaped formation is obtained, for example, with 7, in which a blank of Membrane 6 by applying pressure and in most Cases also by thermal treatment in the deep-drawing process is drawn over a form 12. The height 1 of the form extension determines the height of the bobbin 11.

    Die Ausführungsform gemäß Fig. 5 kann durch Verwendung einer Form geschaffen werden, die auf der später dem Magnetsystem zugewandten Seite der Folie 6 angeordnet wird, wobei Folienmaterial entsprechend in eine Vertiefung dieser Form eingepreßt wird. Dies kann insbesondere bei gut tiefziehbarem Folienmaterial verwendet werden. Es ist in diesem Fall auch möglich, statt des Gasüberdruckes auf der der Form abgewandten Seite der Folie einen Preßstempel zu verwenden. Als Material für die Folie sei beispielsweise Polycarbonat, Polyetheresterurethan oder PETP-Folie, beispielsweise Mylar, genannt.5 can be used a form that is later based on the Magnet system facing side of the film 6 arranged is, film material accordingly in a recess this shape is pressed. This can be particularly the case with well thermoformable film material can be used. It is in this case also possible instead of the excess gas pressure a die on the side of the film facing away from the mold to use. As a material for the film, for example Polycarbonate, polyetherester urethane or PETP film, for example called Mylar.

    Es ist durch die erfindungsgemäße Ausgestaltung der Membrane auch möglich, weiter zu einer Versteifung des Kuppelbereiches 8 zu kommen, was zum Vermeiden parasitärer Schwingungen angestrebt wird. Damit wird auch das Luftvolumen unter dem Sickenbereich mit dem Luftvolumen unter dem Kuppelbereich in vorteilhafter Weise verbunden.It is due to the design of the membrane according to the invention also possible to further stiffen the dome area 8 to come, what to avoid parasitic Vibrations is sought. This also increases the air volume under the bead area with the air volume under connected to the dome area in an advantageous manner.

    Dies kann beispielsweise dadurch bewirkt werden, daß, wie in Fig. 8 dargestellt, die Ausbildung des Fortsatzes 11 nicht entlang des gesamten Umfanges des Kuppelbereiches 8 erfolgt, sondern, daß durchgängige Brücken 13 zwischen dem Sickenbereich 7 und dem Kuppelbereich 8 verbleiben, was insbesondere bei der Ausbildung des Fortsatzes gemäß Fig. 6 günstig sein kann. Die nur einen geringen Spalt bildende Unterbrechung des Fortsatzes 11 stört das Aufbringen und Verkleben der Tauchspule 9 dabei nicht.This can be done, for example, by how 8, the formation of the extension 11th not along the entire circumference of the dome area 8 takes place, but that continuous bridges 13 between the Beading area 7 and the dome area 8 remain what especially in the formation of the extension Fig. 6 can be cheap. The only slight gap Forming interruption of the extension 11 interferes with the application and sticking the plunger 9 not.

    Es können weiters bei der Membrane alle bisher üblichen Methoden und Verfahren und Maßnahmen der Verbesserung des Frequenzganges etc. verwendet werden. So können im Sickenbereich 7 die namensgebenden Sicken vorgesehen werden, es kann der Kuppelbereich 8 mit Versteifungen, einer zweiten versteifenden Lage oder mit größerer Dicke ausgestaltet werden und es können auch alle anderen bei der Herstellung elektroakustischer Wandler üblichen Verbesserungs- und Ausgestaltungsmaßnahmen vorgesehen werden.In addition, all of the previously usual diaphragms can be used Methods and procedures and measures to improve the Frequency response etc. can be used. So in the bead area 7 the eponymous beads are provided there can the dome area 8 with stiffeners, a second stiffening layer or designed with greater thickness and everyone else can make it electroacoustic transducer usual improvement and Design measures are provided.

    Die Erfindung ist für die auf diesem Gebiet derzeit üblichen und dem Fachmann bekannten Materialien anwendbar, wobei natürlich der Fachmann solche Materialien der Membrane 6 bevorzugt, die ein ausgeprägt günstiges Tiefziehverhalten haben, um auf diese Weise ohne Fertigungsprobleme eine möglichst große Höhe 1 des ringförmigen Fortsatzes 11 zu erzielen. Es lassen sich axiale Erstreckungen des Fortsatzes und bis zu 3 mm problemlos erreichen, wobei die Ausgangsfolie für die Herstellung der Membrane 6 bevorzugt eine Dicke von 20 bis 80 Mikrometer aufweist.The invention is for those currently common in this field and applicable materials known to those skilled in the art, and of course those skilled in the art use such membrane materials 6 preferred, which has a distinctly favorable deep-drawing behavior have to do this without manufacturing problems the greatest possible height 1 of the annular extension 11 to achieve. There are axial extensions of the extension and easily reach up to 3 mm, whereby the starting film for the manufacture of the membrane 6 preferably has a thickness of 20 to 80 micrometers.

    Die Erfindung ist nicht auf das dargestellte Ausfürungsbeispiel beschränkt, sondern kann verschiedentlich abgewandelt werden. So kann die Stirnfläche des integrierten Spulenträgers, auf der die Spule befestigt wird, eine besondere Geometrie, beispielsweise eine Abstufung, aufweisen, um die Montage zu erleichtern. Es kann der Fachmann in Kenntnis der Erfindung auch die angegebenen Materialien durch andere ersetzen, die ihm geläufiger sind.The invention is not based on the exemplary embodiment shown limited, but can be modified in various ways will. So the end face of the integrated Coil carrier on which the coil is attached, one have special geometry, for example a gradation, to make assembly easier. It can be the specialist with knowledge of the invention also the specified materials replace with others that are more familiar to him.

    Claims (4)

    Elektroakustischer Wandler, der nach dem elektrodynamischen Prinzip arbeitet, mit einer Membrane (8), die mit einer Spule (9) verbunden ist, wobei die Spule (9) in den ringförmigen Schlitz zwischen den Polen eines Magneten (3, 4, 5) ragt, dadurch gekennzeichnet, daß die Membrane (8) im Bereich der Spule (9) einen ringförmigen Fortsatz (11) einstückig mit ihr ausgeformt aufweist, an dem die Spule befestigt, bevorzugt angeklebt ist.Electroacoustic transducer based on the electrodynamic Principle works with a membrane (8) that works with a coil (9) is connected, the coil (9) in the annular slot between the poles of a magnet (3, 4, 5) protrudes, characterized in that the membrane (8) an annular extension (11) in the area of the coil (9) molded integrally with it, on which the coil attached, preferably glued. Elektroakustischer Wandler nach Anspruch 1, dadurch gekennzeichnet, daß die Spule (9) Stirnseite an Stirnseite am ringförmigen Fortsatz (11) angeordnet ist.Electroacoustic transducer according to claim 1, characterized characterized in that the coil (9) face to face is arranged on the annular extension (11). Elektroakustischer Wandler nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der ringförmige Fortsatz (11) brückenartige Unterbrechungen (13) aufweist.Electroacoustic transducer according to one of the preceding Claims, characterized in that the annular Extension (11) has bridge-like interruptions (13). Elektroakustischer Wandler nach Anspruch 3, dadurch gekennzeichnet, daß vier brückenartige Unterbrechungen (13) vorgesehen sind.Electroacoustic transducer according to claim 3, characterized characterized that four bridge-like interruptions (13) are provided.
    EP98890123A 1997-04-30 1998-04-29 Electroacoustic transducer Expired - Lifetime EP0876079B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    AT755/97 1997-04-30
    AT0075597A AT405997B (en) 1997-04-30 1997-04-30 ELECTROACOUSTIC CONVERTER
    AT75597 1997-04-30

    Publications (2)

    Publication Number Publication Date
    EP0876079A1 true EP0876079A1 (en) 1998-11-04
    EP0876079B1 EP0876079B1 (en) 2001-12-19

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    ID=3498940

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP98890123A Expired - Lifetime EP0876079B1 (en) 1997-04-30 1998-04-29 Electroacoustic transducer

    Country Status (7)

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    US (1) US6587570B1 (en)
    EP (1) EP0876079B1 (en)
    JP (1) JP3926473B2 (en)
    AT (2) AT405997B (en)
    DE (1) DE59802496D1 (en)
    DK (1) DK0876079T3 (en)
    ES (1) ES2170470T3 (en)

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    WO2001056330A2 (en) * 2000-01-27 2001-08-02 Koninklijke Philips Electronics N.V. Electroacoustic transducer having a diaphragm with coil mounting projections and interposed stabilizing walls
    DE202010006188U1 (en) * 2010-04-28 2011-03-03 Elac Electroacustic Gmbh Speaker with actuator and sealing membrane

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    ATE315880T1 (en) 2003-09-11 2006-02-15 Akg Acoustics Gmbh DYNAMIC ELECTROACOUSTIC TRANSDUCER, ESPECIALLY SMALL SPEAKER
    EP1694094A1 (en) * 2005-02-18 2006-08-23 AKG Acoustics GmbH Membrane for a dynamic converter
    CN1905756A (en) * 2005-07-29 2007-01-31 富准精密工业(深圳)有限公司 Sound membrane for micro-electroacoustic apparatus
    US7706563B2 (en) * 2005-12-19 2010-04-27 Harman International Industries, Incorporated Concentric radial ring motor
    US20070297639A1 (en) * 2006-06-21 2007-12-27 Noll Michael A Multiple magnet loudspeaker
    US8121337B2 (en) * 2008-09-08 2012-02-21 Eugen Nedelcu Free air magnetic circuit and speaker
    FR2941837B1 (en) * 2009-02-02 2016-09-16 Orkidia Audio MOBILE CREW AND ELECTRODYNAMIC TRANSDUCER EQUIPPED WITH SUCH MOBILE CREW.
    HU229608B1 (en) * 2011-10-04 2014-03-28 Zoltan Bay Loudspeaker
    KR101760754B1 (en) * 2016-08-23 2017-07-25 주식회사 이엠텍 Side diaphragm with waterproof and microspeaker having the same

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    Publication number Priority date Publication date Assignee Title
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    DE202010006188U1 (en) * 2010-04-28 2011-03-03 Elac Electroacustic Gmbh Speaker with actuator and sealing membrane

    Also Published As

    Publication number Publication date
    EP0876079B1 (en) 2001-12-19
    US6587570B1 (en) 2003-07-01
    DE59802496D1 (en) 2002-01-31
    ES2170470T3 (en) 2002-08-01
    JPH10322791A (en) 1998-12-04
    ATE211346T1 (en) 2002-01-15
    JP3926473B2 (en) 2007-06-06
    ATA75597A (en) 1998-06-15
    AT405997B (en) 2000-01-25
    DK0876079T3 (en) 2002-04-08

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