EP0876079B1 - Electroacoustic transducer - Google Patents
Electroacoustic transducer Download PDFInfo
- Publication number
- EP0876079B1 EP0876079B1 EP98890123A EP98890123A EP0876079B1 EP 0876079 B1 EP0876079 B1 EP 0876079B1 EP 98890123 A EP98890123 A EP 98890123A EP 98890123 A EP98890123 A EP 98890123A EP 0876079 B1 EP0876079 B1 EP 0876079B1
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- EP
- European Patent Office
- Prior art keywords
- membrane
- coil
- electroacoustic transducer
- area
- annular
- 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 - Lifetime
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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
- the invention relates to an electroacoustic transducer which is based on the electrodynamic Principle works with a membrane connected to a coil, with the coil in The annular slot protrudes between the poles of a magnet and is the starting sheet for the manufacture of the membrane by deep drawing, a thickness of 20 to 80 microns.
- Electroacoustic transducers that work on the electrodynamic principle have a membrane that is connected to a coil.
- the coil protrudes into the ring-shaped Slot between the poles of a magnet and the transformation from acoustic into electrical energy or vice versa occurs through the movement of the coil.
- the invention aims to remedy this situation and to provide a solution for deep-drawn Membranes can do without the use of a bobbin, but they do allows the coil to be placed further away from the actual membrane plane than before and so better to position in the magnetic yoke.
- this is done in that the membrane in Transitional area between the central area and the bead area one has an annular extension formed integrally with it, on which the coil end face attached to the face, preferably glued.
- This invention is based on the knowledge that it is possible in the deep-drawing process, the Deform the membrane so that a coil former is made in one piece from the membrane material can also be molded during the manufacture of the membrane. Because this formation in the same tool and in the same operation as the membrane shaping takes place, there are no tolerance or adjustment problems, the previously necessary is eliminated own coil support part and the attachment of the coil to the inventive Extension is as unproblematic as before when the coil is mounted directly on the membrane without using a bobbin.
- Another advantage is the lack of an additional vibrating mass, such as the coil carrier has always been formed, which is particularly high in the implementation 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.
- There are axial extensions of the extension easily reach up to 3 mm, whereby the starting film for the manufacture of the membrane 6 has a thickness of 20 to 80 microns.
- the invention is not based on the exemplary embodiment shown limited, but can be modified in various ways become. 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
Description
Die Erfindung betrifft einen elektroakustischen Wandler, der nach dem elektrodynamischen Prinzip arbeitet, mit einer Membrane, die mit einer Spule verbunden ist, wobei die Spule in den ringförmigen Schlitz zwischen den Polen eines Magneten ragt und wobei die Ausgangsfolie für die durch Tiefziehen erfolgende Herstellung der Membrane eine Dicke von 20 bis 80 Mikrometer aufweist.The invention relates to an electroacoustic transducer which is based on the electrodynamic Principle works with a membrane connected to a coil, with the coil in The annular slot protrudes between the poles of a magnet and is the starting sheet for the manufacture of the membrane by deep drawing, a thickness of 20 to 80 microns.
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 that work on the electrodynamic principle have a membrane that is connected to a coil. The coil protrudes into the ring-shaped Slot between the poles of a magnet and the transformation from acoustic into electrical energy or vice versa occurs through 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 a high level of efficiency and good quality in terms of a low distortion factor to come, it is desirable that the movement of the coil in a range of Magnetic field takes place in which there is the maximum possible intensity and good linearity has, thus in the 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 to be addressed to the membrane or its surroundings is that the Membrane should move freely within the largest possible amplitude without on to bump any components. This demand turns out to be the first demand as adversarial, since the coil sits on the membrane and thus also the yoke of the Magnets must be placed close to the membrane, which in turn means freedom of movement the membrane is 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.In order to remedy this problem, it has become known in the prior art that Membrane to glue a coil former, which is essentially the shape of a cylindrical Has jacket and an adhesive edge for gluing to the membrane. At a distance the membrane is then glued to the coil carrier by the membrane, so that the membrane can have a greater distance from the magnet and yet the coil is in the best possible position in the magnetic yoke. So captivating this solution on the looks at first glance, it is so difficult to achieve: it becomes another component, namely the bobbin needed. This coil support must be glued to the membrane become, which leads to handling problems, since the membrane is a sensitive one Cuticle is, common strengths of membranes are in the order of 40 Micrometer and often below it, and what makes it necessary subsequently, the coil on Attach membrane support, which is also extremely problematic because of a fixation membrane carrier is not easy to make. On top of all that, there are tolerance and adjustment problems due to 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 is typically at high clock speeds is produced, cycle speeds of 6 seconds per work step quite common, which places high demands on the devices used.
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 with sticking on arise, in particular of the bobbin on the membrane fully to bear, as it is almost impossible is, the tiny available adhesive surfaces are sufficiently flawless with adhesive to provide.
Es gibt auch Membranen mit deutlich größeren Dicken, die durch Spritzgießen in Formen hergestellt werden und bei denen die Ausbildung von Spulenträgern technologisch kein schwieriges Problem ist. Es soll dazu auf die JP 03273800 A und die JP 57168599 A verwiesen werden, die beide derartige Membranen für Lautsprecher offenbaren.There are also membranes with significantly larger thicknesses that are injection molded into molds are produced and in which the formation of coil carriers is technologically no is difficult problem. For this purpose, reference is made to JP 03273800 A and JP 57168599 A. that both disclose such membranes for speakers.
Die Erfindung bezweckt hier Abhilfe zu schaffen und eine Lösung anzugeben, die bei tiefgezogenen Membranen ohne die Verwendung eines Spulenträgers auskommt, aber doch erlaubt, die Spule weiter weg als bisher von der eigentlichen Membranebene anzuordnen und so besser im Magnetjoch zu positionieren.The invention aims to remedy this situation and to provide a solution for deep-drawn Membranes can do without the use of a bobbin, but they do allows the coil to be placed further away from the actual membrane plane than before and so better to position in the magnetic yoke.
Erfindungsgemäß geschieht dies dadurch, daß die Membrane im Übergangsbereich zwischen dem Zentralbereich und dem Sickenbereich einen ringförmigen Fortsatz einstückig mit ihr ausgeformt aufweist, an dem die Spule Stirnseite an Stirnseite befestigt, bevorzugt angeklebt, ist. According to the invention, this is done in that the membrane in Transitional area between the central area and the bead area one has an annular extension formed integrally with it, on which the coil end face attached to the face, 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 is possible in the deep-drawing process, the Deform the membrane so that a coil former is made in one piece from the membrane material can also be molded during the manufacture of the membrane. Because this formation in the same tool and in the same operation as the membrane shaping takes place, there are no tolerance or adjustment problems, the previously necessary is eliminated own coil support part and the attachment of the coil to the inventive Extension is as unproblematic as before when the coil is mounted directly on the membrane without using 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 vibrating mass, such as the coil carrier has always been formed, which is particularly high in the implementation Frequencies has a positive effect.
Die Erfindung wird im folgenden an Hand der Zeichnung näher erläutert. Dabei zeigt
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
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
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
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
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
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
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
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
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
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
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
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.It is also possible to use all of the usual diaphragms
Methods and procedures and measures to improve the
Frequency response etc. can be used. So in the
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 bis zu 3 mm problemlos erreichen, wobei die Ausgangsfolie für die Herstellung der Membrane 6 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 easily reach up to 3 mm, whereby the starting film for the manufacture of the membrane 6 has a thickness of 20 to 80 microns.
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 become. 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 (5)
- An electroacoustic transducer which works in accordance with the electrodynamic principle, having a diaphragm (6) which has a central zone (8) and an edge zone (7), and which is connected to a coil (9), wherein the coil (9) projects into the annular slot between the poles of a magnet (3,4,5) and wherein a starting film for the production of the diaphragm (6) carried out by deep-drawing has a thickness of 20 to 80 micrometres, characterised in that in the transition zone between the central zone (8) and the edge zone (7) the diaphragm (6) has an annular extension (11) which is formed integrally therewith and on which the coil (9) is mounted end face to end face, preferably adhered thereto.
- An electroacoustic transducer according to Claim 1, characterised in that the diaphragm has a thickness of 40 micrometres or less.
- An electroacoustic transducer according to Claim 1 or 2, characterised in that the annular extension (11) is of groove-like cross-section.
- An electroacoustic transducer according to any one of the preceding Claims, characterised in that the annular extension (11) has bridge-like interruptions (13).
- An electroacoustic transducer according to Claim 4, characterised in that four bridge-like interruptions (13) are provided.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT75597 | 1997-04-30 | ||
AT755/97 | 1997-04-30 | ||
AT0075597A AT405997B (en) | 1997-04-30 | 1997-04-30 | ELECTROACOUSTIC CONVERTER |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0876079A1 EP0876079A1 (en) | 1998-11-04 |
EP0876079B1 true EP0876079B1 (en) | 2001-12-19 |
Family
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)
Country | Link |
---|---|
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) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE388601T1 (en) * | 2000-01-27 | 2008-03-15 | Nxp Bv | ELECTROACOUSTIC TRANSDUCER HAVING A MEMBRANE WITH COIL MOUNTING PROJECTIONS AND INTERMEDIATE STABILIZING WALLS |
JP4159408B2 (en) * | 2003-05-26 | 2008-10-01 | パイオニア株式会社 | Speaker |
EP1515582B1 (en) | 2003-09-11 | 2006-01-11 | AKG Acoustics GmbH | Dynamic electroacoustic converter, in particular 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. |
DE202010006188U1 (en) * | 2010-04-28 | 2011-03-03 | Elac Electroacustic Gmbh | Speaker with actuator and sealing membrane |
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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US2392143A (en) * | 1942-11-30 | 1946-01-01 | Rca Corp | Loud-speaker |
BE623239A (en) * | 1961-10-04 | |||
US3616529A (en) * | 1967-08-31 | 1971-11-02 | Philips Corp | Transducer and method of making same |
JPS53148425A (en) | 1977-05-31 | 1978-12-25 | Kenkichi Tsukamoto | Electric sound transducer |
JPS603277B2 (en) | 1978-06-15 | 1985-01-26 | ソニー株式会社 | speaker device |
US4532383A (en) * | 1980-01-04 | 1985-07-30 | Willy Erazm A | Electroacoustic transducer having a variable thickness diaphragm |
JPS6038077B2 (en) * | 1980-04-16 | 1985-08-29 | 松下電器産業株式会社 | speaker |
JPS57168599A (en) * | 1981-04-09 | 1982-10-16 | Mitsubishi Electric Corp | Bobbinless voice coil |
JPS58153496A (en) * | 1982-03-05 | 1983-09-12 | Sanyo Electric Co Ltd | Production of speaker |
NL8202529A (en) | 1982-06-23 | 1984-01-16 | Philips Nv | ELECTRO-ACOUSTIC CONVERTER WITH A LONG STROKE. |
NL8301653A (en) | 1983-05-10 | 1984-12-03 | Philips Nv | ELECTRO-ACOUSTIC CONVERTER WITH AN AIR-PERMISSIBLE MEMBRANE. |
JPH03220897A (en) * | 1990-01-25 | 1991-09-30 | Matsushita Electric Ind Co Ltd | Speaker |
JPH03273800A (en) * | 1990-03-22 | 1991-12-04 | Matsushita Electric Ind Co Ltd | Dome type loudspeaker |
US5526441A (en) * | 1991-11-15 | 1996-06-11 | Codnia; Basilio | Full range convex electrodynamic loudspeaker |
DE4312159C1 (en) * | 1993-04-14 | 1994-06-23 | Sennheiser Electronic | Electrodynamic transducer for headphone or microphone |
KR950024611A (en) * | 1994-01-05 | 1995-08-21 | 구쯔자와 겐따로우 | Speaker with magnetic circuit |
-
1997
- 1997-04-30 AT AT0075597A patent/AT405997B/en not_active IP Right Cessation
-
1998
- 1998-04-28 US US09/067,879 patent/US6587570B1/en not_active Expired - Fee Related
- 1998-04-28 JP JP11886798A patent/JP3926473B2/en not_active Expired - Fee Related
- 1998-04-29 ES ES98890123T patent/ES2170470T3/en not_active Expired - Lifetime
- 1998-04-29 DK DK98890123T patent/DK0876079T3/en active
- 1998-04-29 AT AT98890123T patent/ATE211346T1/en not_active IP Right Cessation
- 1998-04-29 DE DE59802496T patent/DE59802496D1/en not_active Expired - Lifetime
- 1998-04-29 EP EP98890123A patent/EP0876079B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ATE211346T1 (en) | 2002-01-15 |
ATA75597A (en) | 1998-06-15 |
DE59802496D1 (en) | 2002-01-31 |
ES2170470T3 (en) | 2002-08-01 |
DK0876079T3 (en) | 2002-04-08 |
AT405997B (en) | 2000-01-25 |
JP3926473B2 (en) | 2007-06-06 |
EP0876079A1 (en) | 1998-11-04 |
US6587570B1 (en) | 2003-07-01 |
JPH10322791A (en) | 1998-12-04 |
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