EP0914020A2 - Loudspeaker - Google Patents

Loudspeaker Download PDF

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Publication number
EP0914020A2
EP0914020A2 EP98119683A EP98119683A EP0914020A2 EP 0914020 A2 EP0914020 A2 EP 0914020A2 EP 98119683 A EP98119683 A EP 98119683A EP 98119683 A EP98119683 A EP 98119683A EP 0914020 A2 EP0914020 A2 EP 0914020A2
Authority
EP
European Patent Office
Prior art keywords
drive system
loudspeaker
flat membrane
centering
membrane
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.)
Granted
Application number
EP98119683A
Other languages
German (de)
French (fr)
Other versions
EP0914020B1 (en
EP0914020A3 (en
Inventor
Leonhard Kreitmeier
Berhard Puls
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 Becker Automotive Systems GmbH
Original Assignee
Nokia Technology GmbH
Harman Audio Electronic Systems GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Technology GmbH, Harman Audio Electronic Systems GmbH filed Critical Nokia Technology GmbH
Publication of EP0914020A2 publication Critical patent/EP0914020A2/en
Publication of EP0914020A3 publication Critical patent/EP0914020A3/en
Application granted granted Critical
Publication of EP0914020B1 publication Critical patent/EP0914020B1/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers
    • 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
    • H04R9/06—Loudspeakers
    • 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
    • H04R9/041—Centering

Definitions

  • the invention is concerned with reducing the overall depth of loudspeakers with flat membranes.
  • Speakers with flat membranes are generally designed so that a Drive system is connected to a speaker basket.
  • the flat membrane In the speaker basket the flat membrane is arranged with an axial distance to the drive system.
  • the side of the flat membrane facing the drive system is marked with a Provide push rod which extends in the direction of the drive system. Becomes such a trained speaker with low-frequency sound signals a sound signal source, these are from the drive system in the Push rod and thus also lifting movements acting on the flat membrane reshaped, whereby the flat membrane in accordance with the supplied sound signals in vibrations reflecting a sound event are displaced.
  • the flat diaphragm set in vibration along the center line of the loudspeaker maintains its centricity to the center line of the loudspeaker in every vibration state, it is fastened with elastic centering means by at least the edge of the flat diaphragm being connected to the loudspeaker basket by means of a so-called bead. If you left it alone with this type of centering, this would have to be very sufficient to achieve sufficient guidance of the flat membrane hard ". However, since a hard design of the corrugation considerably limits the range of use of such loudspeakers, in the case of woofers in particular, there has been a move towards providing additional centering means.
  • the invention is therefore based on the object of having a loudspeaker Specify flat membrane, which despite the presence of in axial Centering means spaced apart from each other a reduced overall depth having.
  • the radial distance is that of the flat membranes have ends of the support means facing away from the loudspeaker axis, at least 3 ⁇ 4 the distance between the loudspeaker center axis and the outer edge of the flat membrane, the wobble protection is particularly good Flat membrane reached.
  • FIG 4 is a speaker 10 with a flat membrane 11 according to the state the technology shown.
  • This speaker 10 is essentially one Drive system 12, a speaker basket 13 and said flat membrane 11 formed, which is at an axial distance from the drive system 12 in the speaker basket 13 is arranged.
  • the drive system 12 is in the present case by a Inference arrangement 12.1 and a permanent magnet 12.2 formed, a Air gap 14 remains in the drive system 12, into which a voice coil 15 immersed. If the voice coil 15 with a low-frequency sound signals When the audio signal source is applied (everything not shown), the voice coil moves 15 in the direction of the loudspeaker central axis 16. This movement of the voice coil 15 is because the voice coil 15 via a push rod 17 (also voice coil former called) with the side facing the drive system 12 Flat membrane 11 is connected, transferred to the flat membrane 11.
  • a push rod 17 also voice coil former called
  • the first centering device 18.1 which is also known as a bead, connects the edge of the flat membrane 11 with the speaker basket 13.
  • the second centering means 18.2 in the form of So-called centering membrane surrounds the voice coil bobbin 17 without a gap and is also connected to the speaker basket 13. What is striking is this Type of arrangement that between the first centering means 18.1 and Centering membrane 18.2 a distance A in the direction of the loudspeaker central axis 16 consists.
  • This distance A is necessary to tilt the voice coil bobbin 17, which is also referred to as tumbling, during the movement the voice coil bobbin 17 in the direction of the loudspeaker central axis 16 to exclude. Greater distances A than that shown in Figure 1 reduce the tendency to wobble, but cause the depth T of the Speaker 10 enlarged even further. Can the distance A including depth T of the speaker 10, however, due to installation dimensions cannot be realized for the loudspeaker 10, only the distance A can be charged a smaller stroke of the speaker 10 can be reduced, because at one less stroke of the flat membrane 11 in the direction of the loudspeaker central axis 16 a wobble of the voice coil bobbin 17 does not appear as strongly. A reduced stroke leads to the fact that such speakers 10 for the Bass reproduction become unusable.
  • the height H is a part of the distance A1 between the flat membrane 11 and the Fills drive system 12. Regardless of the requirement that the distance A between the two centering means 18.1 and 18.2 for bass reproduction should be as large as possible, the height H of the centering membrane 18.2 leads inevitably to increase the distance A1 and thus also the depth T of the Speaker 10.
  • the side of the flat membrane facing the drive system 12 11 provided with support means 19 which are in the direction of the drive system 12 extend.
  • the support means 19 With the ends 20 facing away from the flat membrane 11 the support means 19 with the centering means 18.2 in the form of the centering membrane 18.2 connected, the space which is connected radially to the drive system 12 then be used for centering without having to use centering the depth of the loudspeaker 10 of the centering membrane 18.2 got to.
  • the individual implementations according to the invention are shown in FIGS. 1-3, which, however, do not show scale reproductions, can be removed.
  • the loudspeaker 10 is driven by a drive system 12 and a speaker basket 13 is formed.
  • the flat membrane 12 is axial Distance to the drive system 12 used in the speaker basket 13.
  • the outer edge of the flat membrane 12 is by means of the bead 18.1 with the Speaker basket 13 connected.
  • the side facing the drive system 12 the flat membrane 11 is provided with a support means 19 which one has a trapezoidal cross-section and which is in the direction of the drive system 12 extends.
  • the end 20 of the flat membrane facing away from the Support means 19 is connected to the centering membrane 18.2, the Centering membrane 18.2 extends away from the drive system 12 and on it other end is connected to the speaker basket 13.
  • the embodiment according to FIG. 2 differs from the embodiment according to Figure 1 in that the centering membrane connected to the support means 19 18.2 extends in the direction of the drive system 12. Even if the Centering membrane 18.2 in FIG. 2 is connected to the loudspeaker basket 13, can in another - not shown - embodiment, the centering membrane 18.2 can also be connected directly to the drive system 121.
  • the embodiment according to FIG. 2 is also the flat membrane 11 and the support means 19 in one piece from foamed Plastic material formed.
  • the embodiment according to FIG. 3 differs from the embodiment of FIG Figures 1 and 2 characterized in that the support means 19 from the connecting region 21st goes out between the voice coil bobbin 17 and the flat membrane 11 and from there is guided in an arc into the area 22, which extends radially to the Drive system 12 connects.
  • the support means 19 from the connecting region 21st goes out between the voice coil bobbin 17 and the flat membrane 11 and from there is guided in an arc into the area 22, which extends radially to the Drive system 12 connects.

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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)

Abstract

The loudspeaker (10) comprises a flat membrane (11) with a small installation depth and a large lift. The side of the membrane, facing a drive system (12), is equipped with support devices (19) which extend along a central axis (16) of the loudspeaker towards the drive system. A centering membrane (18.2) is connected with an end (20) of the support device, which is averted from the flat membrane.

Description

Technisches GebietTechnical field

Die Erfindung befaßt sich mit der Verringerung der Bautiefe von Lautsprechern mit Flachmembranen.The invention is concerned with reducing the overall depth of loudspeakers with flat membranes.

Stand der TechnikState of the art

Lautsprecher mit Flachmembranen sind allgemein so aufgebaut, daß ein Antriebssystem mit einem Lautsprecherkorb verbunden ist. In dem Lautsprecherkorb ist die Flachmembran mit axialem Abstand zum Antriebssystem eingeordnet. Die dem Antriebssystem zugewandte Seite der Flachmembran ist mit einer Schubstange versehen, welche sich in Richtung des Antriebssystems erstreckt. Wird ein derart ausgebildeter Lautsprecher mit niederfrequenten Tonsignalen einer Tonsignalquelle beaufschlagt, werden diese vom Antriebssystem in auf die Schubstange und damit auch auf die Flachmembran wirkende Hubbewegungen umgeformt, womit die Flachmembran entsprechend der zugeführten Tonsignale in ein Schallereignis wiedergebende Schwingungen versetzt wird.Speakers with flat membranes are generally designed so that a Drive system is connected to a speaker basket. In the speaker basket the flat membrane is arranged with an axial distance to the drive system. The side of the flat membrane facing the drive system is marked with a Provide push rod which extends in the direction of the drive system. Becomes such a trained speaker with low-frequency sound signals a sound signal source, these are from the drive system in the Push rod and thus also lifting movements acting on the flat membrane reshaped, whereby the flat membrane in accordance with the supplied sound signals in vibrations reflecting a sound event are displaced.

Damit die in Schwingungen längs der Lautsprechermittelachse versetzte Flachmembran in jedem Schwingungszustand ihre Zentrizität zur Lautsprechermittelachse behält, ist diese mit elastischen Zentriermitteln befestigt, indem zumindest der Rand der Flachmembran mit dem Lautsprecherkorb mittels einer sogenannten Sicke verbunden ist. Würde man es allein bei dieser Art der Zentrierung belassen, müßte diese zur Erreichung einer ausreichenden Führung der Flachmembran sehr

Figure 00010001
hart" ausgelegt werden. Da aber eine harte Auslegung der Sicke den Anwendungsbereich derartiger Lautsprecher erheblich einschränkt, ist man insbesondere bei Tieftonlautsprecher dazu übergegangen, weitere Zentriermittel vorzusehen. Diese weiteren Zentriermittel, welche auch als Zentrierspinnen oder Zentriermembranen bekannt sind, werden gemäß dem Stand der Technik bei Lautsprechern mit Flachmembranen radial zur Lautsprechermittelachse zwischen der Schubstange und dem Lautsprecherkorb angeordnet. Damit diese zusätzlichen Zentriermittel aber wirkungsvoll arbeiten, ist ein axialer Abstand zwischen der Sicke und der Zentriermembran notwendig. Um dies zu realisieren, muß der axiale Abstand der Flachmembran zum Antriebssystem bzw. die Länge der Schubstange vergrößert werden, damit ein möglichst großer Abstand zwischen den beiden Zentriermitteln verbleibt. Diese Abstandsvergrößerung führt aber unweigerlich auch zu einer Vergrößerung der Tiefe des Lautsprechers insgesamt.So that the flat diaphragm set in vibration along the center line of the loudspeaker maintains its centricity to the center line of the loudspeaker in every vibration state, it is fastened with elastic centering means by at least the edge of the flat diaphragm being connected to the loudspeaker basket by means of a so-called bead. If you left it alone with this type of centering, this would have to be very sufficient to achieve sufficient guidance of the flat membrane
Figure 00010001
hard ". However, since a hard design of the corrugation considerably limits the range of use of such loudspeakers, in the case of woofers in particular, there has been a move towards providing additional centering means. These additional centering means, which are also known as centering spiders or centering membranes, are made according to the prior art in the case of loudspeakers with flat diaphragms, arranged radially to the loudspeaker center axis between the push rod and the loudspeaker cage. In order for these additional centering means to work effectively, however, an axial distance between the bead and the centering diaphragm is necessary. the length of the push rod is increased so that the greatest possible distance remains between the two centering means, but this increase in distance inevitably leads to an increase in the overall depth of the loudspeaker.

Daher liegt der Erfindung die Aufgabe zugrunde, einen Lautsprecher mit Flachmembran anzugeben, welcher trotz des Vorhandenseins von in axialem Abstand zueinander angeordneten Zentriermitteln eine verminderte Bautiefe aufweist.The invention is therefore based on the object of having a loudspeaker Specify flat membrane, which despite the presence of in axial Centering means spaced apart from each other a reduced overall depth having.

Darstellung der ErfindungPresentation of the invention

Diese Aufgabe wird mit den in Anspruch 1 angegebenen Merkmalen gelöst. Vorteilhafte Aus- und Weiterbildungen der Erfindung sind den Ansprüchen 2 und 3 entnehmbar.This object is achieved with the features specified in claim 1. Advantageous further developments of the invention are claims 2 and 3 removable.

Wird die dem Antriebssystem zugewandte Seite der Flachmembran mit Stützmitteln versehen, die sich in Richtung des Antriebssystems erstrecken, und sind die der Flachmembran abgewandten Enden der Stützmittel mit Zentriermitteln (Zentriermembran) versehen, kann der ohnehin vorhandene Raum, welcher seitlich (radial) an das Antriebssystem anschließt, zur Zentrierung genutzt werden, ohne daß für die Wahrung des axialen Abstandsgebots zwischen Sicke und Zentriermembran eine Vergrößerung der Tiefe des Lautsprechers notwendig wird.If the side of the flat membrane facing the drive system with support means provided, which extend in the direction of the drive system, and are the ends of the support means facing away from the flat membrane with centering means (Centering membrane), the already existing space, which Connects laterally (radially) to the drive system, used for centering be without having to maintain the axial distance requirement between beads and centering membrane an increase in the depth of the speaker is necessary becomes.

Beträgt gemäß Anspruch 2 der radiale Abstand, den die von den Flachmembranen abgewandten Enden der Stützmittel zur Lautsprecherachse haben, wenigstens ¾ des Abstandes zwischen der Lautsprechermittelachse und dem äußeren Rand der Flachmembran, wird ein besonders guter Taumelschutz der Flachmembran erreicht.According to claim 2, the radial distance is that of the flat membranes have ends of the support means facing away from the loudspeaker axis, at least ¾ the distance between the loudspeaker center axis and the outer edge of the flat membrane, the wobble protection is particularly good Flat membrane reached.

Ist die Flachmembran zusammen mit den Stützmitteln einstückig aus geschäumtem Kunststoffmaterial hergestellt, ist der Aufbau von erfindungsgemäßen Lautsprechern besonders einfach. Außerdem hat die Verwendung von geschäumtem Kunststoffmaterial den Vorteil, daß das zusätzliche Gewicht der Stützmittel die schwingende Masse des Lautsprechers nur unwesentlich erhöht.Is the flat membrane together with the support means made of one piece made of foamed plastic material, is the structure of the invention Speakers particularly easy. It also has the use of foamed plastic material has the advantage that the additional weight of the Support means increases the vibrating mass of the speaker only slightly.

Kurze Darstellung der FigurenBrief presentation of the figures

Es zeigen:

Figur 1
einen Lautsprecher im Schnitt;
Figur 2
eine weitere Darstellung gemäß Figur 1;
Figur 3
einen weiteren Lautsprecher im Schnitt; und
Figur 4
einen Lautsprecher gemäß dem Stand der Technik.
Show it:
Figure 1
an average speaker;
Figure 2
a further representation according to Figure 1;
Figure 3
another speaker on average; and
Figure 4
a loudspeaker according to the prior art.

Wege zum Ausführen der ErfindungWays of Carrying Out the Invention

Die Erfindung soll nun anhand der Figuren näher erläutert werden. In Figur 4 ist ein Lautsprecher 10 mit einer Flachmembran 11 gemäß dem Stand der Technik gezeigt. Dieser Lautsprecher 10 wird im wesentlichen von einem Antriebssystem 12, einem Lautsprecherkorb 13 und der besagten Flachmembran 11 gebildet, welche mit axialem Abstand zum Antriebssystem 12 im Lautsprecherkorb 13 angeordnet ist. Das Antriebssystem 12 wird vorliegend von einer Rückschlußanordnung 12.1 und einem Dauermagneten 12.2 gebildet, wobei ein Luftspalt 14 im Antriebssystem 12 verbleibt, in welche eine Schwingspule 15 eintaucht. Wird die Schwingspule 15 mit niederfrequenten Tonsignalen einer Tonsignalquelle beaufschlagt (alles nicht gezeigt), bewegt sich die Schwingspule 15 in Richtung der Lautsprechermittelachse 16. Diese Bewegung der Schwingspule 15 wird, da die Schwingspule 15 über eine Schubstange 17 (auch Schwingspulenträger genannt) mit der dem Antriebssystem 12 zugewandten Seite der Flachmembran 11 verbunden ist, auf die Flachmembran 11 übertragen.The invention will now be explained in more detail with reference to the figures. In Figure 4 is a speaker 10 with a flat membrane 11 according to the state the technology shown. This speaker 10 is essentially one Drive system 12, a speaker basket 13 and said flat membrane 11 formed, which is at an axial distance from the drive system 12 in the speaker basket 13 is arranged. The drive system 12 is in the present case by a Inference arrangement 12.1 and a permanent magnet 12.2 formed, a Air gap 14 remains in the drive system 12, into which a voice coil 15 immersed. If the voice coil 15 with a low-frequency sound signals When the audio signal source is applied (everything not shown), the voice coil moves 15 in the direction of the loudspeaker central axis 16. This movement of the voice coil 15 is because the voice coil 15 via a push rod 17 (also voice coil former called) with the side facing the drive system 12 Flat membrane 11 is connected, transferred to the flat membrane 11.

Damit die Flachmembran 11 bei ihrer Bewegung in Richtung der Lautsprechermittelachse 16 ihre Zentrizität zur Lautsprechermittelachse 16 beibehält, sind Zentriermittel 18 vorgesehen. Das erste Zentriermittel 18.1 welches auch als Sicke bezeichnet wird, verbindet den Rand der Flachmembran 11 mit dem Lautsprecherkorb 13. Das zweite Zentriermittel 18.2 in der Form der sogenannten Zentriermembran umrandet den Schwingspulenträger 17 abstandlos und ist ebenfalls mit dem Lautsprecherkorb 13 verbunden. Auffällig ist bei dieser Art der Anordnung, daß zwischen dem ersten Zentriermittel 18.1 und der Zentriermembran 18.2 ein Abstand A in Richtung der Lautsprechermittelachse 16 besteht. Dieser Abstand A ist notwendig, um ein Verkippen des Schwingspulenträgers 17, welches auch als Taumeln bezeichnet wird, während der Bewegung des Schwingspulenträgers 17 in Richtung der Lautsprechermittelachse 16 auszuschließen. Größere Abstände A als der, der in Figur 1 gezeigt ist, reduzieren zwar die Taumelneigung, führen aber dazu, daß sich die Tiefe T des Lautsprechers 10 noch weiter vergrößert. Kann die einen größeren Abstand A einschließende Tiefe T des Lautsprechers 10 jedoch aufgrund von Einbaumaßen für den Lautsprecher 10 nicht realisiert werden, kann nur der Abstand A zu Lasten eines geringeren Hubs des Lautsprechers 10 verkleinert werden, da bei einem geringeren Hub der Flachmembran 11 in Richtung der Lautsprechermittelachse 16 ein Taumeln des Schwingspulenträgers 17 nicht so stark in Erscheinung tritt. Ein verminderter Hub führt aber dazu, daß derartige Lautsprecher 10 für die Tieftonwiedergabe unbrauchbar werden.So that the flat membrane 11 when moving in the direction of Loudspeaker central axis 16 their centricity to the loudspeaker central axis 16 maintains centering means 18 are provided. The first centering device 18.1 which is also known as a bead, connects the edge of the flat membrane 11 with the speaker basket 13. The second centering means 18.2 in the form of So-called centering membrane surrounds the voice coil bobbin 17 without a gap and is also connected to the speaker basket 13. What is striking is this Type of arrangement that between the first centering means 18.1 and Centering membrane 18.2 a distance A in the direction of the loudspeaker central axis 16 consists. This distance A is necessary to tilt the voice coil bobbin 17, which is also referred to as tumbling, during the movement the voice coil bobbin 17 in the direction of the loudspeaker central axis 16 to exclude. Greater distances A than that shown in Figure 1 reduce the tendency to wobble, but cause the depth T of the Speaker 10 enlarged even further. Can the distance A including depth T of the speaker 10, however, due to installation dimensions cannot be realized for the loudspeaker 10, only the distance A can be charged a smaller stroke of the speaker 10 can be reduced, because at one less stroke of the flat membrane 11 in the direction of the loudspeaker central axis 16 a wobble of the voice coil bobbin 17 does not appear as strongly. A reduced stroke leads to the fact that such speakers 10 for the Bass reproduction become unusable.

Außerdem muß im Zusammenhang mit der Anordnung gemäß Figur 4 berücksichtigt werden, daß die Zentriermembran 18.2 durch ihre gewellte Struktur mit der Höhe H einen Teil des Abstands A1 zwischen der Flachmembran 11 und dem Antriebssystem 12 ausfüllt. Unabhängig von der Forderung, daß der Abstand A zwischen den beiden Zentriermitteln 18.1 und 18.2 für die Tieftonwiedergabe möglichst groß sein soll, führt die Höhe H der Zentriermembran 18.2 zwangsläufig zu einer Vergrößerung des Abstandes A1 und damit auch der Tiefe T des Lautsprechers 10.In addition, must be considered in connection with the arrangement according to Figure 4 be that the centering membrane 18.2 with its corrugated structure the height H is a part of the distance A1 between the flat membrane 11 and the Fills drive system 12. Regardless of the requirement that the distance A between the two centering means 18.1 and 18.2 for bass reproduction should be as large as possible, the height H of the centering membrane 18.2 leads inevitably to increase the distance A1 and thus also the depth T of the Speaker 10.

Um dennoch die Forderung nach einer geringen Einbautiefe für einen Lautsprecher 10 mit dor Anforderung nach einem großen Hub zu kombinieren, wurde gemäß der Erfindung die dem Antriebssystem 12 zugewandte Seite der Flachmembran 11 mit Stützmitteln 19 versehen, die sich in Richtung des Antriebssystems 12 erstrecken. Sind die der Flachmembran 11 abgewandten Enden 20 der Stützmittel 19 mit den Zentriermitteln 18.2 in der Form der Zentriermembran 18.2 verbunden, kann der Raum, welcher radial an das Antriebssystem 12 anschließt, zur Zentrierung genutzt werden, ohne daß für die Zentrierung mittels der Zentriermembran 18.2 die Tiefe des Lautsprechers 10 vergrößert werden muß. Die einzelnen Realisierungen gemäß der Erfindung sind den Figuren 1 - 3, welche allerdings keine maßstäblichen Wiedergaben zeigen, entnehmbar.To meet the requirement for a low installation depth for a loudspeaker 10 was combined with the requirement for a large stroke According to the invention, the side of the flat membrane facing the drive system 12 11 provided with support means 19 which are in the direction of the drive system 12 extend. Are the ends 20 facing away from the flat membrane 11 the support means 19 with the centering means 18.2 in the form of the centering membrane 18.2 connected, the space which is connected radially to the drive system 12 then be used for centering without having to use centering the depth of the loudspeaker 10 of the centering membrane 18.2 got to. The individual implementations according to the invention are shown in FIGS. 1-3, which, however, do not show scale reproductions, can be removed.

Auch bei der Erfindung wird der Lautsprecher 10, von einem Antriebssystem 12 und einem Lautsprecherkorb 13 gebildet. Die Flachmembran 12 ist mit axialem Abstand zum Antriebssystem 12 in den Lautsprecherkorb 13 eingesetzt. Der äußere Rand der Flachmembran 12 ist mittels der Sicke 18.1 mit dem Lautsprecherkorb 13 verbunden. Die dem Antriebssystem 12 zugewandte Seite der Flachmembran 11 ist mit einem Stützmittel 19 versehen, welches einen trapezförmigen Querschnitt hat und welches sich in Richtung des Antriebssystems 12 erstreckt. Das der Flachmembran 12 abgewandte Ende 20 des Stützmittels 19 ist mit der Zentriermembran 18.2 verbunden, wobei sich die Zentriermembran 18.2 vom Antriebssystem 12 weg erstreckt und an ihrem anderen Ende mit dem Lautsprecherkorb 13 verbunden ist.In the invention as well, the loudspeaker 10 is driven by a drive system 12 and a speaker basket 13 is formed. The flat membrane 12 is axial Distance to the drive system 12 used in the speaker basket 13. The outer edge of the flat membrane 12 is by means of the bead 18.1 with the Speaker basket 13 connected. The side facing the drive system 12 the flat membrane 11 is provided with a support means 19 which one has a trapezoidal cross-section and which is in the direction of the drive system 12 extends. The end 20 of the flat membrane facing away from the Support means 19 is connected to the centering membrane 18.2, the Centering membrane 18.2 extends away from the drive system 12 and on it other end is connected to the speaker basket 13.

Die Ausführung gemäß Figur 2 unterscheidet sich von der Ausführung gemäß Figur 1 dadurch, daß sich die mit dem Stützmittel 19 verbundene Zentriermembran 18.2 in Richtung des Antriebssystems 12 erstreckt. Auch wenn die Zentriermembran 18.2 in Figur 2 mit dem Lautsprecherkorb 13 verbunden ist, kann in einem anderen - nicht dargestellten - Ausführungsbeispiel die Zentriermembran 18.2 auch direkt mit dem Antriebssystem 121 verbunden sein.The embodiment according to FIG. 2 differs from the embodiment according to Figure 1 in that the centering membrane connected to the support means 19 18.2 extends in the direction of the drive system 12. Even if the Centering membrane 18.2 in FIG. 2 is connected to the loudspeaker basket 13, can in another - not shown - embodiment, the centering membrane 18.2 can also be connected directly to the drive system 121.

Wie in der Ausführung gemäß Figur 1 ist auch in der Ausführung gemäß Figur 2 die Flachmembran 11 und das Stützmittel 19 einstückig aus geschäumtem Kunststoffmaterial gebildet.As in the embodiment according to FIG. 1, the embodiment according to FIG. 2 is also the flat membrane 11 and the support means 19 in one piece from foamed Plastic material formed.

Um eine gute Zentrierwirkung der mit dem Stützmittel 19 verbundenen Zentriermembran 18.2 zu erzielen, erfüllen sämtliche in den Figuren 1 - 3 gezeigten Ausführungen die in Anspruch 3 angegebene Forderung, wonach der radiale Abstand, den die von der jeweiligen Flachmembran 11 abgewandten Enden 20 des jeweiligen Stützmittels 19 zur Lautsprechermittelachse 16 haben soll, wenigstens ¾ des Abstandes zwischen der Lautsprechermittelachse 16 und dem äußeren Rand der Flachmembran 11 beträgt.To ensure a good centering effect of those connected to the support means 19 Achieving centering membrane 18.2 is achieved by all of FIGS. 1-3 Executions shown the claim specified in claim 3, according to which radial distance which is facing away from the respective flat membrane 11 Have ends 20 of the respective support means 19 to the loudspeaker central axis 16 should, at least ¾ of the distance between the speaker center axis 16 and the outer edge of the flat membrane 11.

Die Ausführung gemäß Figur 3 unterscheidet sich von den Ausführungen der Figuren 1 und 2 dadurch, daß das Stützmittel 19 vom Verbindungsbereich 21 zwischen dem Schwingspulenträger 17 und der Flachmembran 11 ausgeht und von dort bogenförmig in den Bereich 22 geführt ist, welcher sich radial an das Antriebssystem 12 anschließt. Auch für diese Anordnung ist trotz der Führung der Stützmittel 19 zum Schwingspulenträger 17 kein zusätzlicher Abstand A1 (gemäß Figur 4) notwendig, weil die relativ geringe Dicke des bogenförmigen Stützmittels 19 vernachlässigt werden kann.The embodiment according to FIG. 3 differs from the embodiment of FIG Figures 1 and 2 characterized in that the support means 19 from the connecting region 21st goes out between the voice coil bobbin 17 and the flat membrane 11 and from there is guided in an arc into the area 22, which extends radially to the Drive system 12 connects. For this arrangement, too, despite the leadership Support means 19 to voice coil support 17 no additional distance A1 (according to Figure 4) necessary because of the relatively small thickness of the arcuate support means 19 can be neglected.

Claims (3)

Lautsprecher mit einem Antriebssystem 12, mit einem Lautsprecherkorb 13, welcher mit dem Antriebssystem 12 verbunden ist, mit einer Flachmembran 11, welche in axialem Abstand zum Antriebssystem 12 angeordnet ist, wobei sich eine Schubstange 17, welche mit der Flachmembran 11 verbunden ist, in Richtung des Antriebsystems 12 erstreckt, und mit Zentriermitteln 18, welche die Flachmembran 11 zentrisch zum Antriebssystem 12 halten und führen,
dadurch gekennzeichnet, daß mit der dem Antriebssystem 12 zugewandten Seite der Flachmembran 11 Stützmittel 19 verbunden ist, die sich in Richtung des Antriebssystems 12 erstrecken, und daß die der Flachmembran 11 abgewandten Enden 20 der Stützmittel 19 mittels von Zentriermitteln 18.2 mit dem Lautsprecherkorb 13 und/oder dem Antriebssystem 12 verbunden sind. speaker with a drive system 12, with a loudspeaker basket 13 which is connected to the drive system 12, with a flat membrane 11, which is arranged at an axial distance from the drive system 12, wherein a push rod 17, which is connected to the flat membrane 11, extends in the direction of the drive system 12, and with centering means 18, which hold and guide the flat membrane 11 centrally to the drive system 12,
characterized, that is connected to the drive system 12 facing side of the flat membrane 11 support means 19 which extend in the direction of the drive system 12, and that the ends 20 of the support means 19 facing away from the flat membrane 11 are connected to the loudspeaker basket 13 and / or the drive system 12 by means of centering means 18.2. Lautsprecher nach Anspruch 1,
dadurch gekennzeichnet,
daß der radiale Abstand, den die von der Flachmembran 11 abgewandten Enden 20 der Stützmittel 19 zur Lautsprechermittelachse 16 haben, wenigstens ¾ des Abstandes zwischen der Lautsprechermittelachse 16 und dem äußeren Rand der Flachmembran 11 beträgt.A loudspeaker according to claim 1,
characterized,
that the radial distance between the ends 20 of the support means 19 facing away from the flat diaphragm 11 and the loudspeaker central axis 16 is at least ¾ of the distance between the loudspeaker central axis 16 and the outer edge of the flat diaphragm 11. Lautsprecher nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß die Flachmembran 11 und die Stützmittel 19 einstückig aus geschäumtem Kunststoffmaterial gebildet sind.Loudspeaker according to claim 1 or 2,
characterized,
that the flat membrane 11 and the support means 19 are formed in one piece from foamed plastic material.
EP98119683A 1997-10-30 1998-10-19 Loudspeaker Expired - Lifetime EP0914020B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997147955 DE19747955C2 (en) 1997-10-30 1997-10-30 speaker
DE19747955 1997-10-30

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EP0914020A2 true EP0914020A2 (en) 1999-05-06
EP0914020A3 EP0914020A3 (en) 2004-09-22
EP0914020B1 EP0914020B1 (en) 2007-06-27

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Cited By (5)

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WO2002089522A2 (en) * 2001-04-25 2002-11-07 Harman/Becker Automotive Systems (Straubing Division) Gmbh Loudspeaker
WO2005015950A1 (en) * 2003-08-08 2005-02-17 Koninklijke Philips Electronics N.V. Loudspeaker with undulated membrane
US8045745B2 (en) 2005-11-21 2011-10-25 Pioneer Corporation Edge support for a speaker apparatus comprising multiple ridges
DE102012214263A1 (en) * 2012-08-10 2014-02-13 Sennheiser Electronic Gmbh & Co. Kg Dynamic electroacoustic transducer for use in e.g. microphone, has membrane having set of stiffening portions in region of portion, where set of stiffening portions has stiffness that is different from stiffness of portion
GB2542382A (en) * 2015-09-17 2017-03-22 Gp Acoustics (Uk) Ltd Low-profile loudspeaker

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002089522A2 (en) * 2001-04-25 2002-11-07 Harman/Becker Automotive Systems (Straubing Division) Gmbh Loudspeaker
WO2002089522A3 (en) * 2001-04-25 2003-08-14 Harman Becker Automotive Sys Loudspeaker
US7292707B2 (en) 2001-04-25 2007-11-06 Harman Becker Automotive Systems Gmbh Loudspeaker
WO2005015950A1 (en) * 2003-08-08 2005-02-17 Koninklijke Philips Electronics N.V. Loudspeaker with undulated membrane
US8045745B2 (en) 2005-11-21 2011-10-25 Pioneer Corporation Edge support for a speaker apparatus comprising multiple ridges
DE102012214263A1 (en) * 2012-08-10 2014-02-13 Sennheiser Electronic Gmbh & Co. Kg Dynamic electroacoustic transducer for use in e.g. microphone, has membrane having set of stiffening portions in region of portion, where set of stiffening portions has stiffness that is different from stiffness of portion
US8879777B2 (en) 2012-08-10 2014-11-04 Sennheiser Electronic Gmbh & Co. Kg Dynamic electroacoustic transducer
DE102012214263B4 (en) 2012-08-10 2019-01-24 Sennheiser Electronic Gmbh & Co. Kg Dynamic electroacoustic transducer
GB2542382A (en) * 2015-09-17 2017-03-22 Gp Acoustics (Uk) Ltd Low-profile loudspeaker
EP3145217A1 (en) * 2015-09-17 2017-03-22 GP Acoustics (UK) Limited Low-profile loudspeaker
CN106550307A (en) * 2015-09-17 2017-03-29 Gp 声学（英国）有限公司 Low-profile speaker
US10034094B2 (en) 2015-09-17 2018-07-24 Gp Acoustics (Uk) Limited Low-profile loudspeaker

Also Published As

Publication number Publication date
DE59814039D1 (en) 2007-08-09
EP0914020B1 (en) 2007-06-27
EP0914020A3 (en) 2004-09-22
DE19747955C2 (en) 2002-11-07
DE19747955A1 (en) 1999-05-06

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