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EP1078552B1 - Device for dynamic excitation of panel loudspeakers - Google Patents

Device for dynamic excitation of panel loudspeakers Download PDF

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Publication number
EP1078552B1
EP1078552B1 EP99926308A EP99926308A EP1078552B1 EP 1078552 B1 EP1078552 B1 EP 1078552B1 EP 99926308 A EP99926308 A EP 99926308A EP 99926308 A EP99926308 A EP 99926308A EP 1078552 B1 EP1078552 B1 EP 1078552B1
Authority
EP
European Patent Office
Prior art keywords
sound panel
driver
sound
panel
core layer
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
Application number
EP99926308A
Other languages
German (de)
French (fr)
Other versions
EP1078552A1 (en
Inventor
Wolfgang Bachmann
Gerhard Krump
Hans-Jürgen Regl
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.)
Harman Audio Electronic Systems GmbH
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Harman Audio Electronic Systems GmbH
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Filing date
Publication date
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Publication of EP1078552A1 publication Critical patent/EP1078552A1/en
Application granted granted Critical
Publication of EP1078552B1 publication Critical patent/EP1078552B1/en
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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00Diaphragms for electromechanical transducers; Cones
    • H04R7/02Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04Plane diaphragms
    • H04R7/06Plane diaphragms comprising a plurality of sections or layers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00Diaphragms for electromechanical transducers; Cones
    • H04R7/02Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04Plane diaphragms
    • H04R7/045Plane diaphragms using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06Loudspeakers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06Loudspeakers
    • H04R9/066Loudspeakers using the principle of inertia

Definitions

  • the invention relates to a device for dynamic excitation of Record speakers according to the preamble of claim 1.
  • Such devices are for example from US-A-4 514 599, WO-A-97 09859 and WO-A-98 52383 (prior art under Article 54 (3) EPC).
  • Multi-resonance plates are significantly more complex because of the strong edge reflections.
  • This complexity in multi-resonance plates arises from the fact that the Main lobe with frequency-dependent direction from a plurality of other such Main lobes is superimposed, so that a highly diversified directional diagram arises, which is also very frequency dependent.
  • multi-resonance plates have in common that their directional diagrams tend to be on average point away from the perpendicular. This behavior causes the room is more closely involved in the projection of the sound waves.
  • the sound panel is built on the sandwich principle, by two each other opposite surfaces of a very light core layer each with a thin cover layer are connected for example by gluing. So that Sound panel has good sound reproduction properties, the material for the top layer have a particularly high expansion shaft speed.
  • Suitable cover layer materials are, for example, thin metal foils or also fiber-reinforced plastic films.
  • the core layer There are also special requirements for the core layer. That's the way it is necessary that the usable materials have a low mass density and have low damping.
  • the materials for the Core layer as high a shear modulus perpendicular to the surfaces have, which are connected to the cover layers.
  • the materials usable for core layers in the direction in which later the core layer formed from this material is its largest Has a very low modulus of elasticity. This in relation at first glance contradicting the last two requirements Requirements are most likely to be met by a core layer, the one Hole structure with between the two for coating with the Breakthroughs provided with surface layers preferably has a small cross section.
  • hard foams can also be used as core layer materials because despite their isotropic material properties, these are still suitable shear and have moduli of elasticity. Not to be left unmentioned in this The connection remains that when using rigid foams as material for the core layer, the cover layers have the task of doing the required produce anisotropic behavior of the sound panel.
  • the invention has for its object a plate speaker or better a holder for drivers of multi-resonance plate speakers specify which are connected to the sound panel, but despite the connection with the sound panel do not or only insignificantly hinder its deformation.
  • the Sound panel 11 is a section AA according to FIG. 2 through a plate loudspeaker 10 shown.
  • This plate speaker 10 is essentially one Sound panel 11 and an electromagnetic driver 12 formed.
  • the Sound panel 11 consists of a hard foam Core layer 11 ', which is connected to two cover layers 11 ".
  • the core layer 11 can also be a Have a honeycomb structure.
  • a recess 13 is milled into the sound panel 11, which houses the driver 12.
  • the driver 12 is essentially one Pot-shaped yoke arrangement 14, a permanent magnet 15 and one with a voice coil 16 provided voice coil support 17 is formed.
  • the Voice coil former 17 is also pot-shaped and with its Bottom 17 'connected to the core layer 11' via a plate 18.
  • the Voice coil former 17 by means of a centering membrane 20 with the Inference arrangement 14 connected.
  • page 21 is provided with a bracket 22.
  • This bracket 22nd is provided with three tabs 23 (Fig. 2), which the lateral distance A span between the yoke arrangement 14 and the core layer 11 '.
  • the holder 22 with the tabs 23 made of plastic. Unless a good one If heat dissipation from the driver 12 is desired, the holder 22 can also be used Metal be formed or be reduced to only the tabs 23.
  • Fig. 3 shows a plate speaker, in which the driver 12 is not in the Sound panel 11 is integrated, but is attached to the outside of the sound panel 11.
  • a holder 22 is provided to accommodate the weight of the driver 12, which has an elastic member 25 in the form of a corrugated contour.
  • the holder 22 is formed all the way around and continuously connected to the sound panel 11. Which is through this continuous connection resulting stiffening of the sound panel 11 thereby diminished that the elastic member 25 in the shape of the corrugated Contour can yield to the embossed bending shafts.
  • the driver 12 is also on the outside Sound panel 11 attached and connected to this by means of a bracket 22. Similar to the plate loudspeaker according to FIG. 1, the holder 22 4 also only three tabs 23, which extend from the driver 12 to the sound panel 11 guided and connected to it at points 24 (Fig. 5). As a result of that the tabs 23 have a curved contour (Fig. 4), they act at the same time as elastic members 25 and thus support the free Mobility of the sound panel 11 during operation.
  • the plate loudspeaker according to FIGS. 1 and 2 is still added that the flat tabs 23 used there also with a elastic member 25 can be provided.
  • This elastic member 25 can be provided, for example, in that the tabs 23 are very thin are formed and / or the distance A between the core layer 11 'and the yoke arrangement 14 is enlarged.
  • FIG. 6 shows a section along the center line through a plate loudspeaker 10 according to the invention shown with driver 12 attached to the side.
  • the bracket 22 between the Driver 12 and the sound panel 11 is solved so that the inference arrangement 14 is connected to a ring 26 made of elastic material.
  • This ring 26, which acts as an elastic member 25, was in the present case made of a foam formed and is inserted into a tube 27.
  • the facing the sound panel 11 The end face 28 of the tube 27 is provided with three tabs 23 (only two of which are visible in FIG. 6) are provided, which establish the connection to the sound panel 11. at In this embodiment, the decoupled connection between the driver 12 and the sound panel 11 by a combination of an elastic member 25 and an attachment reduced to three (connection) points 24.
  • modifications of the shown Brackets 22 are possible. For example, it is possible to mount the bracket 22 4 and 6 so that they change one in the sound panel 11 according to FIGS Fig 1 integrated driver 12 attached.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Description

Technisches GebietTechnical field

Die Erfindung betrifft eine Vorrichtung zur dynamischen Anregung von Plattenlautsprechern gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a device for dynamic excitation of Record speakers according to the preamble of claim 1.

Stand der TechnikState of the art

Derartige Vorrichtungen sind beispielsweise aus der US-A-4 514 599, WO-A-97 09859 und der WO-A-98 52383 (Stand der Technik gemäß Artikel 54(3) EPÜ) bekannt.Such devices are for example from US-A-4 514 599, WO-A-97 09859 and WO-A-98 52383 (prior art under Article 54 (3) EPC).

Gemäß dem Stand der Technik sind Schallwiedergabeanordnungen bekannt, die nach dem Biegewellenprinzip arbeiten. Derartige Anordnungen, welche auch als Multiresonanzplattenlautsprecher bezeichnet werden, werden im wesentlichen von einem Klangpaneel und wenigstens einem Antriebssystem in der Form eines Treibers gebildet, wobei das Klangpaneel in Schwingungen versetzt wird, wenn den Treibern elektrische Tonsignale zugeführt werden. Charakteristisch für solche Schallwiedergabeanordnungen ist, daß ab einer kritischen unteren Grenzfrequenz eine "Biegewellenabstrahlung" möglich wird, wobei die Biegewellen in der Ebene des jeweiligen Paneels zu einer Schallabstrahlung mit frequenzabhängiger Richtung führen. Mit anderen Worten, ein Schnitt durch ein erstelltes Richtdiagramm zeigt eine Hauptkeule, deren Richtung frequenzabhängig ist. Diese Verhältnisse sind für unendlich ausgedehnte Platten vollständig gültig, während die Verhältnisse für die in dieser Anmeldung behandelten Multiresonanzplatten wegen der starken Randreflexe deutlich komplexer sind. Diese Komplexität bei Multiresonanzplatten rührt daher, daß die genannte Hauptkeule mit frequenzabhängiger Richtung von einer Mehrzahl weiterer solcher Hauptkeulen überlagert wird, so daß ein stark aufgefächertes Richtdiagramm entsteht, welches außerdem sehr frequenzabhängig ist. Den hier behandelten Multiresonanzplatten ist aber gemein, daß ihre Richtdiagramme im Mittel eher von der Mittelsenkrechten wegweisen. Dieses Verhalten bewirkt, daß der Raum stärker in die Projektion der Schallwellen einbezogen wird.According to the prior art, sound reproduction arrangements are known which work on the principle of flexible shafts. Such arrangements, which also as Multi-resonance panel speakers are essentially called of a sound panel and at least one drive system in the form of a Driver formed, the sound panel is vibrated when electrical sound signals are supplied to the drivers. Characteristic of such Sound reproduction devices is that from a critical lower cut-off frequency a "bending wave radiation" is possible, the bending waves in the Level of the respective panel for sound radiation with frequency-dependent Lead direction. In other words, a cut through a created one Directional diagram shows a main lobe, the direction of which is frequency-dependent. These relationships are fully valid for infinitely extended plates, while the ratios for those covered in this application Multi-resonance plates are significantly more complex because of the strong edge reflections. This complexity in multi-resonance plates arises from the fact that the Main lobe with frequency-dependent direction from a plurality of other such Main lobes is superimposed, so that a highly diversified directional diagram arises, which is also very frequency dependent. The one covered here However, multi-resonance plates have in common that their directional diagrams tend to be on average point away from the perpendicular. This behavior causes the room is more closely involved in the projection of the sound waves.

Das Klangpaneel ist nach dem Sandwich-Prinzip aufgebaut, indem zwei einander gegenüberliegende Oberflächen einer sehr leichten Kernschicht jeweils mit einer dünnen Deckschicht beispielsweise durch Verklebung verbunden sind. Damit das Klangpaneel gute Schallwiedergabeeigenschaften aufweist, muß das Material für die Deckschicht eine besonders hohe Dehnwellengeschwindigkeit haben. The sound panel is built on the sandwich principle, by two each other opposite surfaces of a very light core layer each with a thin cover layer are connected for example by gluing. So that Sound panel has good sound reproduction properties, the material for the top layer have a particularly high expansion shaft speed.

Geeignete Deckschichtmaterialien sind beispielsweise dünne Metallfolien oder auch faserverstärkte Kunststoffolien.Suitable cover layer materials are, for example, thin metal foils or also fiber-reinforced plastic films.

Auch an die Kernschicht werden besondere Anforderungen gestellt. So ist es notwendig, daß die einsetzbaren Materialien eine geringe Massendichte und eine geringe Dämpfung aufweisen. Außerdem müssen die Materialien für die Kernschicht einen möglichst hohen Schermodul senkrecht zu den Oberflächen haben, die mit den Deckschichten verbunden werden. Schließlich ist notwendig, daß die für Kernschichten verwendbaren Materialien in der Richtung, in welcher später die jeweils aus diesem Material gebildete Kernschicht ihre größte Ausdehnung hat, einem sehr geringen Elastizitätsmodul besitzen. Diese in bezug auf die beiden letzten Anforderungen auf den ersten Blick widersprüchlichen Voraussetzungen werden am ehesten von einer Kernschicht erfüllt, die eine Lochstruktur mit zwischen den beiden für die Beschichtung mit den Deckschichten vorgesehenen Oberflächen verlaufenden Durchbrüchen mit vorzugsweise geringem Querschnitt aufweist. Neben den Kernschichten mit der Lochstruktur sind auch Hartschäume als Kernschichtmaterialien einsetzbar, weil diese trotz ihrer isotropen Materialeigenschaften immer noch geeignete Scher- und Elastizitätsmodule aufweisen. Nicht unerwähnt soll in diesem Zusammenhang bleiben, daß bei der Verwendung von Hartschäumen als Material für die Kernschicht die Deckschichten die Aufgabe haben, das geforderte anisotrope Verhalten des Klangpaneels herzustellen.There are also special requirements for the core layer. That's the way it is necessary that the usable materials have a low mass density and have low damping. In addition, the materials for the Core layer as high a shear modulus perpendicular to the surfaces have, which are connected to the cover layers. Finally, it is necessary that the materials usable for core layers in the direction in which later the core layer formed from this material is its largest Has a very low modulus of elasticity. This in relation at first glance contradicting the last two requirements Requirements are most likely to be met by a core layer, the one Hole structure with between the two for coating with the Breakthroughs provided with surface layers preferably has a small cross section. In addition to the core layers with the Perforated structure, hard foams can also be used as core layer materials because despite their isotropic material properties, these are still suitable shear and have moduli of elasticity. Not to be left unmentioned in this The connection remains that when using rigid foams as material for the core layer, the cover layers have the task of doing the required produce anisotropic behavior of the sound panel.

Um mittels eines oben beschriebenen Klangpaneels Schallwellen abzustrahlen ist es notwendig, das Klangpaneel mit mindestens einem Treiber zu verbinden, welcher dann das Klangpaneel senkrecht zur Ebene der Deckschichten durch zeitvariable Krafteinwirkung zu Schwingungen anregt. Um dies zu realisieren werden nach dem Stand der Technik allgemein elektrodynamische Antriebssysteme verwendet, wie sie im Prinzip auch zum Antrieb von herkömmlichen Lautsprechern verwendet werden. Damit diese Antriebssysteme auch die zur Anregung von Biegewellen notwendige Verformung des Klangpaneels herbeiführen, werden die Treiber überlicherweise mit entsprechenden Gegenlagern versehen. Diese Gegenlager können beispielsweise von einer Stützstruktur gebildet werden, die im Abstand zu einer der beiden Deckfolien angeordnet ist und die Antriebssysteme aufnimmt. Abgesehen davon, daß eine solche Stützstruktur nicht nur die Bautiefe und das Gewicht solcher Anordnungen erhöht, bedingen solche Stützstrukturen auch einen nicht unerheblichen Herstellungsaufwand. Deshalb könnt man sich vorstellen, die als Gegenlager für die Antriebssysteme wirkenden Stützstrukturen direkt mit dem Klangpaneel zu verbinden. Nachteilig ist dabei jedoch, daß die mit dem Klangpaneel verbundenen Stützstrukturen die Generierung von Biegewellen im Klangpaneel durch ungünstige Veränderungen der Punktimpedanzen erschweren. In order to emit sound waves by means of a sound panel described above it is necessary to connect the sound panel to at least one driver, which then through the sound panel perpendicular to the plane of the cover layers time-variable force stimulates vibrations. To realize this are generally electrodynamic according to the prior art Drive systems used, as they in principle also for driving conventional speakers can be used. So these drive systems also the necessary deformation of the excitation of bending waves Bring about sound panels, the drivers are usually with appropriate counter bearings. These counter bearings can for example be formed by a support structure that is spaced from one of the two Cover foils are arranged and accommodates the drive systems. Apart from this, that such a support structure not only the depth and weight of such Arrangements increased, such support structures do not require one insignificant manufacturing effort. Therefore you can imagine the as Counter bearing for the support structures acting directly with the Connect sound panel. The disadvantage, however, is that the Supporting structures connected to the sound panel generate the generation of bending waves in the Difficulty making sound panels difficult due to unfavorable changes in point impedances.

Daher liegt der Erfindung die Aufgabe zugrunde, einen Plattenlautsprecher oder besser eine Halterung für Treiber von Multiresonanzplattenlautsprecher anzugeben, die mit dem Klangpaneel verbunden sind, aber trotz der Verbindung mit dem Klangpaneel dessen Verformung nicht oder nur unwesentlich behindern.Therefore, the invention has for its object a plate speaker or better a holder for drivers of multi-resonance plate speakers specify which are connected to the sound panel, but despite the connection with the sound panel do not or only insignificantly hinder its deformation.

Darstellung der ErfindungPresentation of the invention

Diese Aufgabe wird mit den Merkmalen gemäß Anspruch 1 gelöst. Vorteilhafte Weiterbildungen der Erfindung sind den Ansprüchen 2-4 entnehmbar.This object is achieved with the features according to claim 1. Advantageous developments of the invention can be found in claims 2-4.

Ist gemäß Anspruch 1 die Halterung (Ring mit Rohr) des jeweiligen Treibers an drei Stellen mit dem Klangpaneel verbunden, wird zum einen der Treiber am Klangpaneel befestigt and zum weiteren die freie Beweglichkeit des Klangpaneels im Gegensatz zu den sonst üblichen oder denkbaren Verbindungen erheblich verbessert. Vier oder mehr Stellen, mit denen ein Treiber mit dem Klangpaneel verbunden ist, würden zu einer stärkeren Dämpfungführen.According to claim 1, the holder (ring with tube) of the respective driver on three Connected to the sound panel, the driver on the one hand Sound panel attached and further the free mobility of the Sound panels in contrast to the otherwise usual or conceivable connections significantly improved. Four or more digits with which a driver with the Sound panel would lead to a stronger damping.

Da der Treiber mittels einer ein elastisches Glied aufweisenden Halterung mit dem Klangpaneel verbunden ist, ist sichergestellt, daß die in das Klangpaneel vom Treiber eingeprägten Biegewellen sich weitgehend frei im Klangpaneel ausbreiten können.Since the driver uses a elastic link bracket is connected to the sound panel is ensured that in the Sound panel impressed bending waves largely free in the driver Sound panel can spread.

Die nur an drei Punkten mit dem Klangpaneel verbundene Halterung ist erfindungsgemäß mit elastischen Gliedern versehen. Diese elastischen Glieder verstärken die entkoppelte Verbindung zwischen dem Treiber und dem Klangpaneel, da es in allen Fällen auf eine Tieftonabstimmung ankommt, d.h die unterste Eigenresonanz des Systems, Treiber plus Halter, muß deutlich tiefer als die tiefsten interesierenden (Wiedergabe-) Frequenzen liegen.The only three Points connected to the sound panel is according to the invention with provided elastic links. These elastic links reinforce the decoupled Connection between the driver and the sound panel since it in all cases a low tone tuning is important, i.e. the lowest Natural resonance of the system, driver plus holder, must be significantly deeper than the deepest interesting (playback) frequencies.

Kurze Darstellung der FigurenBrief presentation of the figures

Es zeigen:

Fig. 1
einen Schnitt durch einen Plattenlautsprecher;
Fig. 2
eine Draufsicht auf einen Plattenlautsprecher ;
Fig. 3
einen Schnitt durch einen Plattenlautsprecher;
Fig. 4
einen Schnitt durch einen weiteren Plattenlautsprecher;
Fig. 5
eine Draufsicht auf einen Plattenlautsprecher gemäß Fig. 4; und
Fig. 6
eine erfindungsgemäße Ausführungsform im Schnitt.
Show it:
Fig. 1
a section through a plate speaker;
Fig. 2
a plan view of a plate speaker;
Fig. 3
a section through a plate speaker;
Fig. 4
a section through another plate speaker;
Fig. 5
a plan view of a plate speaker according to FIG. 4; and
Fig. 6
an embodiment of the invention in section.

Wege zu Ausführen der ErfindungWays of Carrying Out the Invention

Die Erfindung wird nun anhand der Figur 6 in Verbindung mit der diese erläuternden Figuren 1-5 dargestellt.The invention will now be illustrated with reference to FIG. 6 in conjunction with FIGS. 1-5 that explain it.

In Fig. 1 ist ein Schnitt AA gemäß Fig. 2 durch einen Plattenlautsprecher 10 gezeigt. Dieser Plattenlautsprecher 10 wird im wesentlichen von einem Klangpaneel 11 und einem elektromagnetischen Treiber 12 gebildet. Das Klangpaneel 11 besteht aus einer aus einem Hartschaum hergestellten Kernschicht 11', welche mit zwei Deckschichten 11" verbunden ist. Die Kernschicht 11 kann auch eine Wabenstruktur haben. In das Klangpaneel 11 ist eine Ausnehmung 13 eingefräst, welche den Treiber 12 aufnimmt. Der Treiber 12 wird im wesentlichen von einer topfförmigen Rückschlußanordnung 14, einem Dauermagneten 15 und einem mit einer Schwingspule 16 versehen Schwingspulenträger 17 gebildet. Der Schwingspulenträger 17 ist gleichfalls topfförmig ausgebildet und mit seinem Boden 17' mit der Kernschicht 11' über eine Platte 18 verbunden. Der Rand 17'' des Schwingspulenträgers 17, welcher mit der Schwingspule 16 versehen ist, taucht in einen im Treiber 12 belassenen Luftspalt 19 ein. Außerdem ist der Schwingspulenträger 17 mittels einer Zentriermembran 20 mit der Rückschlußanordnung 14 verbunden.1 is a section AA according to FIG. 2 through a plate loudspeaker 10 shown. This plate speaker 10 is essentially one Sound panel 11 and an electromagnetic driver 12 formed. The Sound panel 11 consists of a hard foam Core layer 11 ', which is connected to two cover layers 11 ". The core layer 11 can also be a Have a honeycomb structure. A recess 13 is milled into the sound panel 11, which houses the driver 12. The driver 12 is essentially one Pot-shaped yoke arrangement 14, a permanent magnet 15 and one with a voice coil 16 provided voice coil support 17 is formed. The Voice coil former 17 is also pot-shaped and with its Bottom 17 'connected to the core layer 11' via a plate 18. The edge 17 '' the voice coil bobbin 17, which is provided with the voice coil 16, dips into an air gap 19 left in the driver 12. In addition, the Voice coil former 17 by means of a centering membrane 20 with the Inference arrangement 14 connected.

Um den Treiber 12 oder besser die schwere Einheit aus der Rückschlußanordnung 14 und Dauermagnet 15 mit dem Plattenlautsprecher 10 zu verbinden, ist die Seite 21 mit einer Halterung 22 versehen. Diese Halterung 22 ist mit drei Laschen 23 (Fig. 2) versehen, welche den seitlichen Abstand A zwischen der Rückschlußanordnung 14 und der Kernschicht 11' überspannen.To the driver 12 or better the heavy unit from the Inference arrangement 14 and permanent magnet 15 with the plate loudspeaker 10 connect, page 21 is provided with a bracket 22. This bracket 22nd is provided with three tabs 23 (Fig. 2), which the lateral distance A span between the yoke arrangement 14 and the core layer 11 '.

Diese nur an drei Stellen 24 erfolgende Befestigung zwischen dem Treiber 12 und dem Klangpaneel 11 bewirkt, daß die vom Schwingspulenträger 17 während des Betriebs des Plattenlautsprechers 10 in das Klangpaneel 11 eingeprägten Biegewellen weitgehend unbeeinflußt von der Halterung 22 übertragen werden. This only takes place at three points 24 between the driver 12 and the sound panel 11 causes that of the voice coil bobbin 17 during Operation of the plate loudspeaker 10 is embossed into the sound panel 11 Bending waves are transmitted largely unaffected by the bracket 22.

Dies ist darauf zurückzuführen, daß die Bereiche B zwischen den einzelnen Laschen 23 (in Fig. 2 nur für einen Bereich zwischen zwei Laschen durch eine Doppelpfeil angedeutet) nicht durch diese versteift werden.This is due to the fact that the areas B between the individual Tabs 23 (in Fig. 2 only for an area between two tabs by one Indicated by double arrow) can not be stiffened by this.

Bei dem in den Fig. 1 und 2 gezeigten Plattenlautsprecher wurde die Halterung 22 mit samt den Laschen 23 aus Kunststoff hergestellt. Sofern eine gute Wärmeableitung vom Treiber 12 gewünscht ist, kann die Halterung 22 auch aus Metall gebildet sein oder auch nur auf die Laschen 23 reduziert sein.In the case of the plate loudspeaker shown in FIGS. 1 and 2, the holder 22 with the tabs 23 made of plastic. Unless a good one If heat dissipation from the driver 12 is desired, the holder 22 can also be used Metal be formed or be reduced to only the tabs 23.

Fig. 3 zeigt einen Plattenlautsprecher, bei welchem der Treiber 12 nicht im Klangpaneel 11 integriert ist, sondern außen am Klangpaneel 11 angesetzt ist. Um das Gewicht des Treibers 12 aufzunehmen ist eine Halterung 22 vorgesehen, welche ein elastisches Glied 25 in der Form einer gewellten Kontur aufweist. Außerdem ist die Halterung 22 gemäß Fig. 3 umlaufend ausgebildet und durchgängig mit dem Klangpaneel 11 verbunden. Die sich durch diese durchgängige Verbindung ergebene Versteifung des Klangpaneels 11 wird dadurch vermindert, daß das elastische Glied 25 in der Form der gewellten Kontur den eingeprägten Biegewellen nachgeben kann.Fig. 3 shows a plate speaker, in which the driver 12 is not in the Sound panel 11 is integrated, but is attached to the outside of the sound panel 11. Around a holder 22 is provided to accommodate the weight of the driver 12, which has an elastic member 25 in the form of a corrugated contour. In addition, the holder 22 is formed all the way around and continuously connected to the sound panel 11. Which is through this continuous connection resulting stiffening of the sound panel 11 thereby diminished that the elastic member 25 in the shape of the corrugated Contour can yield to the embossed bending shafts.

Auch beim Plattenlautsprecher gemäß der Fig. 4 ist der Treiber 12 außen am Klangpaneel 11 angesetzt und mittels einer Halterung 22 mit diesem verbunden. Ähnlich wie beim Plattenlautsprecher gemäß Fig. 1 umfaßt die Halterung 22 gemäß Fig. 4 auch nur drei Laschen 23, die vom Treiber 12 zum Klangpaneel 11 geführt und an den Stellen 24 mit diesem verbunden sind (Fig. 5). Dadurch, daß die Laschen 23 eine geschwungene Kontur haben (Fig. 4), wirken sie gleichzeitig als elastische Glieder 25 und unterstützen damit die freie Beweglichkeit des Klangpaneels 11 während des Betriebs.4, the driver 12 is also on the outside Sound panel 11 attached and connected to this by means of a bracket 22. Similar to the plate loudspeaker according to FIG. 1, the holder 22 4 also only three tabs 23, which extend from the driver 12 to the sound panel 11 guided and connected to it at points 24 (Fig. 5). As a result of that the tabs 23 have a curved contour (Fig. 4), they act at the same time as elastic members 25 and thus support the free Mobility of the sound panel 11 during operation.

In diesem Zusammenhang sei zu dem Plattenlautsprecher gemäß Fig. 1 und 2 noch nachgetragen, daß die dort verwendeten -flachen- Laschen 23 auch mit einem elastischen Glied 25 versehen sein können. Dieses elastische Glied 25 kann beispielsweise dadurch bereitgestellt werden, daß die Laschen 23 sehr dünn ausgebildet werden und/ oder der Abstand A zwischen der Kernschicht 11' und der Rückschlußanordnung 14 vergrößert wird.In this context, the plate loudspeaker according to FIGS. 1 and 2 is still added that the flat tabs 23 used there also with a elastic member 25 can be provided. This elastic member 25 can can be provided, for example, in that the tabs 23 are very thin are formed and / or the distance A between the core layer 11 'and the yoke arrangement 14 is enlarged.

In Fig. 6 ist ein Schnitt entlang der Mittellinie durch einen erfindungsgemäßen Plattenlautsprecher 10 mit seitlich angesetztem Treiber 12 gezeigt. Die Halterung 22 zwischen dem Treiber 12 und dem Klangpaneel 11 ist so gelöst, daß die Rückschlußanordnung 14 mit einen Ring 26 aus elastischem Material verbunden ist. Dieser Ring 26, welcher als elastisches Glied 25 wirkt, wurde vorliegend aus einem Schaumstoff gebildet und ist in ein Rohr 27 eingesetzt. Die dem Klangpaneel 11 zugewandte Stirnseite 28 des Rohrs 27 ist mit drei Laschen 23 (von denen in Fig. 6 aber nur zwei sichtbar sind) versehen, die die Verbindung zum Klangpaneel 11 herstellen. Bei dieser Ausführungsform wird die entkoppelte Verbindung zwischen dem Treiber 12 und dem Klangpaneel 11 durch eine Kombination aus einem elastischen Glied 25 und einer auf drei (Verbindungs-) Stellen 24 reduzierten Befestigung realisiert. Abschließend sei darauf hingewiesen, daß Modifikationen der gezeigten Halterungen 22 möglich sind. So ist es beispielsweise möglich, die Halterung 22 gemäß den Fig. 4 und 6 so zu verändern, daß sie einen im Klangpaneel 11 gemäß Fig 1 integrierten Treiber 12 befestigt.6 shows a section along the center line through a plate loudspeaker 10 according to the invention shown with driver 12 attached to the side. The bracket 22 between the Driver 12 and the sound panel 11 is solved so that the inference arrangement 14 is connected to a ring 26 made of elastic material. This ring 26, which acts as an elastic member 25, was in the present case made of a foam formed and is inserted into a tube 27. The facing the sound panel 11 The end face 28 of the tube 27 is provided with three tabs 23 (only two of which are visible in FIG. 6) are provided, which establish the connection to the sound panel 11. at In this embodiment, the decoupled connection between the driver 12 and the sound panel 11 by a combination of an elastic member 25 and an attachment reduced to three (connection) points 24. Finally, it should be noted that modifications of the shown Brackets 22 are possible. For example, it is possible to mount the bracket 22 4 and 6 so that they change one in the sound panel 11 according to FIGS Fig 1 integrated driver 12 attached.

Claims (4)

  1. A device for the dynamic excitation of panel loudspeakers having
    a sound panel (11), which comprises a core layer (11') and at least one outer layer (11"),
    at least one electromagnetic driver (12) comprising a magnetic system, and
    a mounting (22) which connects the driver (12) to the sound panel (11),
    wherein a ring (26) made from elastic material, which concentrically surrounds and is connected to the magnetic system, is provided as a mounting (22) for the respective driver (12),
    characterised in that the ring (26) is disposed in a tube (27) and is connected thereto, the end side (28) of the tube (27) facing the sound panel (11) being connected to the sound panel (11) by means of three side bars (23).
  2. A device according to Claim 1,
    characterised in that the driver (12) is placed onto the sound panel (11).
  3. A device according to one of Claims 1 or 2,
    characterised in that foam is provided as elastic material.
  4. A device according to one of Claims 1 to 3,
    characterised in that the ring (26) is connected over its entire inner side to the magnetic system and over its entire outer side to the tube (27).
EP99926308A 1998-05-15 1999-05-14 Device for dynamic excitation of panel loudspeakers Expired - Lifetime EP1078552B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19821861 1998-05-15
DE19821861A DE19821861A1 (en) 1998-05-15 1998-05-15 Device for dynamically exciting flat panel loudspeaker
PCT/EP1999/003309 WO1999060817A1 (en) 1998-05-15 1999-05-14 Device for dynamic excitation of panel loudspeakers

Publications (2)

Publication Number Publication Date
EP1078552A1 EP1078552A1 (en) 2001-02-28
EP1078552B1 true EP1078552B1 (en) 2003-03-05

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP99926308A Expired - Lifetime EP1078552B1 (en) 1998-05-15 1999-05-14 Device for dynamic excitation of panel loudspeakers

Country Status (4)

Country Link
US (1) US6494289B1 (en)
EP (1) EP1078552B1 (en)
DE (2) DE19821861A1 (en)
WO (1) WO1999060817A1 (en)

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Also Published As

Publication number Publication date
DE19821861A1 (en) 1999-11-18
DE59904458D1 (en) 2003-04-10
WO1999060817A1 (en) 1999-11-25
EP1078552A1 (en) 2001-02-28
US6494289B1 (en) 2002-12-17

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