EP0193886A2 - Membrane for a plane loudspeaker - Google Patents
Membrane for a plane loudspeaker Download PDFInfo
- Publication number
- EP0193886A2 EP0193886A2 EP86102605A EP86102605A EP0193886A2 EP 0193886 A2 EP0193886 A2 EP 0193886A2 EP 86102605 A EP86102605 A EP 86102605A EP 86102605 A EP86102605 A EP 86102605A EP 0193886 A2 EP0193886 A2 EP 0193886A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- membrane
- plate
- membrane according
- shaped
- 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.)
- Withdrawn
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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
Definitions
- the invention relates to a membrane for a planar loudspeaker with an intermediate layer arranged between the planar radiation layer and the voice coil
- Every loudspeaker diaphragm must meet two very important requirements: it must be light in order to be able to follow steep signal edges as quickly as possible, and it must be stiff so that it can follow the signal evenly over its entire surface without suffering its own deformation.
- the loudspeaker shows poor reproduction behavior for impulses and high sound frequencies.
- the electrical signals are not converted into genuine, piston-like movements of the membrane, but the membrane suffers deformations due to partial vibrations. Such deformations lead to sound pressure waves which do not correspond to the triggering electrical signal, that is to say reproduce it in a distorted manner.
- partial vibrations mean considerable additional stress on the membrane material, which can lead to fatigue and even destruction of the membrane.
- the known membrane for a planar loudspeaker consists of an essentially frustoconical molded part made of foamed polystyrene, on the flat end face of which two foils are arranged as a planar abstract layer.
- the object underlying the invention is therefore to design the membrane for a planar loudspeaker in such a way that the manufacture of the membrane and thus also the manufacture of the loudspeaker is inexpensive
- the intermediate layer consists of an essentially conical plastic film which is provided with support elements which extend as far as the plate-shaped radiation layer
- the new planar loudspeaker contains a large number of parts, which also contains a loudspeaker with a cone membrane. These are firstly the permanent magnet system 1 to which the loudspeaker basket 2 is attached. In addition there are the voice coil support 3 with the voice coil 4, the centering 5 and the bead-shaped membrane suspension 6. The only two parts specific to a planar loudspeaker are the conical plastic film 7 provided with support elements 9 and the plate-shaped radiation layer 8.
- the radiation layer 8 can consist for example of a circular plate made of foamed polystyrene. It can also be flocked with plastic fibers on the surface arranged in the direction of radiation. Damping of the membrane movement is achieved by such a measure.
- the radiation layer 8 can also be formed in multiple layers. Such a multi-layer construction consists, for example, of two outer thin metal plates, for example thin aluminum sheet, which are firmly connected to an intermediate layer, for example a honeycomb structure.
- Figures 3 and 4 show two embodiments for the provided with supporting elements 9 plastic film 7. It are each a plan view of the plastic film 7 in the direction of arrow 1 0 shown in Fig. 2.
- supporting elements 9 plastic it could also are a conventional cone membrane made of plastic, on which the support elements 9 are placed, for example glued.
- this configuration is likely to be too complex to manufacture. It should therefore be more expedient for a production method in which the support elements 9 are produced in one piece with the plastic film 7. This can be done, for example, by deep-drawing both simultaneously from a flat plastic film.
- the support elements 9 have a frustoconical shape, the taper of which is directed towards the radiation layer
- the support elements 9 have the shape of webs which are arranged on circles.
- FIG. 5 Another embodiment of the radiation layer 8 can be seen from FIG. 5, which differs from the one previously shown in that the rear side is provided with the thickening 11. If this thickening 11 is dimensioned accordingly, the radiation layer 8 can be centered in a simple manner .
Landscapes
- 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)
- Materials For Medical Uses (AREA)
- Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)
Abstract
Die neue Planarmembran besteht aus einer im wesentlichen konusförmigen Kunststoffolie (7), in welche bis zur plattenförmigen Abstrahlschicht (8) reichende Stützelemente (9) eingeprägt sind.The new planar membrane consists of an essentially cone-shaped plastic film (7) into which support elements (9) reaching up to the plate-shaped radiation layer (8) are stamped.
Description
Die Erfindung betrifft eine Membran für einen Planarlautsprecher mit einem zwischen der planaren Abstrahlschicht und der Schwingspule angeordneten ZwischenschichtThe invention relates to a membrane for a planar loudspeaker with an intermediate layer arranged between the planar radiation layer and the voice coil
Eine solche Membran ist bekannt (DE-OS 29 33 425).Such a membrane is known (DE-OS 29 33 425).
Jede Lautsprechermembran muß zwei sehr wichtige Forderungen erfüllen: Sie muß leicht sein, um auch steilen Signatflanken möglichst ohne Verzögerung folgen zu können, und sie muß steif sein, damit sie dem Signal gleichmäßig mit ganzer Fläche folgen kann, ohne Eigenverformungen zu erleiden.Every loudspeaker diaphragm must meet two very important requirements: it must be light in order to be able to follow steep signal edges as quickly as possible, and it must be stiff so that it can follow the signal evenly over its entire surface without suffering its own deformation.
Wenn die erste Forderung nicht erfüllt ist, dann zeigt der Lautpsrecher schlechtes Wiedergabeverhatten für impulse und hohe Tonfrequenzen. Wenn die zweite Forderung nicht erfüllt ist, dann werden die elektrischen Signale nicht in unverfälschte, kolbenartige Bewegungen der Membran umgesetzt, sondern die Membran erleidet Verformungen durch Partialschwingungen. Derartige Verformungen liefem Schalldruckwellen, die dem ansteuernden elektrischen Signal nicht entsprechen, dieses also verzerrt wiedergeben. Außerdem bedeuten solche Partialschwingungen eine erhebliche zusätzliche Beanspruchung des Membranwerkstoffes, welche zur Ermüdung und sogar zur Zerstörung der Membran führen kann.If the first requirement is not met, then the loudspeaker shows poor reproduction behavior for impulses and high sound frequencies. If the second requirement is not met, the electrical signals are not converted into genuine, piston-like movements of the membrane, but the membrane suffers deformations due to partial vibrations. Such deformations lead to sound pressure waves which do not correspond to the triggering electrical signal, that is to say reproduce it in a distorted manner. In addition, such partial vibrations mean considerable additional stress on the membrane material, which can lead to fatigue and even destruction of the membrane.
Um diese Nachteile zu vermeiden, ist bereits dazu übergegangen worden, die an sich bekannte und weit verbreitete kegelförmige Papiermembran durch eine Planar membran zu ersetzen, weil bei ihr die Abstrahlzentren in einer Ebene liegen.In order to avoid these disadvantages, there has already been a move to replace the known and widespread conical paper membrane by a planar membrane because the radiation centers lie in one plane.
Die bekannte Membran für einen Planarlautsprecher besteht aus einem im wesentlichen kegelstumpfförmigen Formteil aus geschäumtem Polystyrol, auf dessen ebene Stirnseite als planare Abstrahischicht zwei Folien übereinander angordnet sind.The known membrane for a planar loudspeaker consists of an essentially frustoconical molded part made of foamed polystyrene, on the flat end face of which two foils are arranged as a planar abstract layer.
Ein solcher Aufbau ist ziemlich aufwendig in der Herstellung und daher teuer. Die der Erfindung zugrunde liegende Aufgabe besteht deshalb darin, die Membran für einen Planarlautsprecher in der Weise zu gestalten, daß die Herstellung der Membran und damit auch die Herstellung des Lautsprechers kostengünstig istSuch a structure is rather complex to manufacture and therefore expensive. The object underlying the invention is therefore to design the membrane for a planar loudspeaker in such a way that the manufacture of the membrane and thus also the manufacture of the loudspeaker is inexpensive
Diese Aufgabe ist erfindungsgemäß dadurch gelöst, daß die Zwischenschicht aus einer im wesentlichen konusförmigen Kunststoffolie besteht welche mit bis zur piattenförmigen Abstrahlschicht reichenden Stützelementen versehen istThis object is achieved according to the invention in that the intermediate layer consists of an essentially conical plastic film which is provided with support elements which extend as far as the plate-shaped radiation layer
Vorteilhafte Ausgestattungen der Erfindung sind in den Ansprüchen 2 bis 7 enthalten. Sie ist nachstehend anhand der Figuren 1 bis 5 näher erläutert Es zeigen:
- Fig. 1 einen Planarlautsprecher mit der erfindungsgemäßen Membran im Querschnitt,
- Fig. 2 den Planarlautsprecher gemäß Fig. 1 in Explosionsdarstellung,
- Fig. 3 eine Ausführungsform der konusförmigen Kunststoffolie,
- Fig. 4 eine andere Ausführungsform der konusförmigen Kunststoffolie und
- Fig. 5 eine andere Ausführungsform der plattenförmigen Abstrahfschicht
- 1 is a planar speaker with the membrane according to the invention in cross section,
- 2 shows the planar loudspeaker according to FIG. 1 in an exploded view,
- 3 shows an embodiment of the conical plastic film,
- Fig. 4 shows another embodiment of the conical plastic film and
- Fig. 5 shows another embodiment of the plate-shaped radiation layer
Wie aus Fig. 1 ersichtlich ist, enthält der neue Planarlautsprecher eine Vielzahl von Teilen, welche auch ein Lautsprecher mit Konusmembran enthält Dies sind zunächst das Dauermagnetsystem 1, an dem der Lautsprecherkorb 2 befestigt ist. Hinzu kommen der Schwingspulenträger 3 mit der Schwingspule 4, die Zentrierung 5 und die sickenförmig ausgebildete Membranaufhängung 6. Die beiden einzigen für einen Planarlautsprecher spezifischen Teile sind die konusförmige, mit Stützelementen 9 versehene Kunststoffolie 7 und die plattenförmige Abstrahischicht 8.As can be seen from FIG. 1, the new planar loudspeaker contains a large number of parts, which also contains a loudspeaker with a cone membrane. These are firstly the
In Fig. 2 sind zur besseren Verdeutlichung die Einzelteile des Lautsprechers nochmals in einer Explosionsdarstellung gezeigt Die Abstrahlschicht 8 kann beispielsweise aus einer kreisförmigen Platte aus geschäumtem Polystyrol bestehen. Sie kann zusätzlich auf der in Abstrahlrichtung angeordneten Oberfläche mit Kunststofffasem beflockt sein. Durch eine solche Maßnahme wird eine Bedämpfung der Membranbewegung erreicht Für besondere Anwendungsfälle kann die Abstrahlschicht 8 auch mehrschichtig ausgebildet sein. Eine solche mehrschichtige Ausbildung besteht beispielsweise aus zwei äußeren dünnen Metallplatten, beispielsweise dünnes Aluminiumblech, welche mit einer Zwischenlage, beispielsweise einer Wabenstruktur, fest verbunden sind.In FIG. 2 the individual parts of the loudspeaker are shown again in an exploded view for better clarification. The
Die Figuren 3 und 4 zeigen zwei Ausführungsformen für die mit Stützelementen 9 versehene Kunststoffolie 7. Es handelt sich jeweils um eine Draufsicht auf die Kunststofffolie 7 in Richtung des Pfeiles 10 gemäß Fig. 2. Bei der mit Stützelementen 9 versehenen Kunststoffolie könnte es sich auch um eine übliche Konusmembran aus Kunststoff handeln, auf welche die Stützelemente 9 aufgesetzt, beispielsweise aufgeklebt sind. Diese Ausgestaltung dürfte jedoch in der Herstellung zu aufwendig sein. Es dürfte daher ein Herstellungsverfahren zweckmäßiger sein, bei dem die Stützelemente 9 einstückig mit der Kunststoffolie 7 hergestellt werden. Das kann beispielsweise dadurch geschehen, daß beide gleichzeitig aus einer ebenen Kunststoffolie tiefgezogen werden.Figures 3 and 4 show two embodiments for the provided with supporting
Bei der aus Fig. 3 ersichtlichen Ausführungsform weisen die Stützelemente 9 eine kegelstumpfförmige Gestalt auf, deren Verjüngung zur Abstrahlschicht hin gerichtet istIn the embodiment shown in FIG. 3, the
Bei der aus Fig. 4 ersichtlichen Ausführungsform besitzen die Stützelemente 9 die Gestalt von Stegen, welche auf Kreisen angeordnet sind.In the embodiment shown in FIG. 4, the
Aus Fig. 5 ist noch eine andere Ausführungsform der Abstrahtschicht 8 zu erkennen, welche sich von der bisher gezeigten dadurch unterscheidet daß die Rückseite mit der Verdickung 11 versehen ist Wenn diese Verdickung 11 entsprechend dimensioniert ist, dann kann die Abstrahlschicht 8 in einfacher Weise zentriert werden.Another embodiment of the
- 1 Dauermagnetsystem1 permanent magnet system
- 2 Lautsprecherkorb2 speaker cages
- 3 Schwingspulenträger3 voice coil former
- 4 Schwingspule4 voice coil
- 5 Zentrierung5 centering
- 6 Membranaufhängung6 membrane suspension
- 7 Kunststoffolie7 plastic film
- 8 Abstrahlschicht8 radiation layer
- 9 Stützelement9 support element
- 10 Pfeil10 arrow
- 11 Verdickung11 thickening
Claims (7)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3507726 | 1985-03-05 | ||
DE19853507726 DE3507726A1 (en) | 1985-03-05 | 1985-03-05 | MEMBRANE FOR PLANAR SPEAKER |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0193886A2 true EP0193886A2 (en) | 1986-09-10 |
EP0193886A3 EP0193886A3 (en) | 1988-01-27 |
Family
ID=6264233
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86102605A Withdrawn EP0193886A3 (en) | 1985-03-05 | 1986-02-28 | Membrane for a plane loudspeaker |
Country Status (5)
Country | Link |
---|---|
US (1) | US4764968A (en) |
EP (1) | EP0193886A3 (en) |
DE (1) | DE3507726A1 (en) |
DK (1) | DK97486A (en) |
NO (1) | NO860671L (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0270981A2 (en) * | 1986-12-06 | 1988-06-15 | EWD Electronic-Werke Deutschland GmbH | Loudspeaker |
WO1991019405A1 (en) * | 1990-06-08 | 1991-12-12 | Simon Paul Carrington | Loudspeaker with a diaphragm having an air conduit |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5848173A (en) * | 1995-03-30 | 1998-12-08 | Pioneer Electronic Corporation | Surroundless loudspeaker |
US5734734A (en) * | 1995-12-29 | 1998-03-31 | Proni; Lucio | Audio voice coil adaptor ring |
DE19747955C2 (en) * | 1997-10-30 | 2002-11-07 | Harman Audio Electronic Sys | speaker |
US6496590B2 (en) | 2000-12-08 | 2002-12-17 | Jl Audio, Inc. | Loudspeaker with improved diaphragm |
US6501844B2 (en) | 2000-12-08 | 2002-12-31 | Jl Audio, Inc. | Loudspeaker and method of assembling same |
US7333620B2 (en) * | 2003-04-09 | 2008-02-19 | Harman International Industries, Incorporated | Acoustic transducer with mechanical balancing |
JP4610890B2 (en) * | 2003-12-24 | 2011-01-12 | パイオニア株式会社 | Speaker device |
JP2006157840A (en) * | 2004-10-25 | 2006-06-15 | Pioneer Electronic Corp | Speaker device |
JP4726090B2 (en) * | 2006-08-24 | 2011-07-20 | パイオニア株式会社 | Speaker device |
GB2479941A (en) | 2010-04-30 | 2011-11-02 | Gp Acoustics | Stiffened loudspeaker diaphragm |
USD856981S1 (en) * | 2016-09-23 | 2019-08-20 | Tymphany Hk Limited | Waveguide for a loudspeaker |
US10244322B2 (en) * | 2016-10-11 | 2019-03-26 | YG Acoustics LLC | Space frame reinforced tweeter dome |
GB2587900B (en) * | 2019-08-23 | 2022-06-22 | Tymphany Acoustic Tech Ltd | A diaphragm for use in an audio transducer and a method of manufacturing a diaphragm |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB301437A (en) * | 1919-11-18 | 1928-11-27 | Adrain Francis Sykes | Improvements in electrodynamic loudspeakers |
DE709710C (en) * | 1935-02-16 | 1941-08-25 | Zeiss Ikon Akt Ges | Membrane for acoustic devices |
FR1348004A (en) * | 1962-01-15 | 1964-01-04 | Akg Akustische Kino Geraete | Diaphragm for acoustic devices |
GB2010637A (en) * | 1977-11-26 | 1979-06-27 | Sony Corp | Diaphragm for loudspeaker |
GB2079564A (en) * | 1978-08-18 | 1982-01-20 | Sony Corp | Loudspeaker diaphragms |
GB2114397A (en) * | 1982-02-04 | 1983-08-17 | Philips Nv | Flat-diaphragm electrodynamic transducer |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL24326C (en) * | 1927-11-07 | |||
US2845135A (en) * | 1955-09-26 | 1958-07-29 | Arthur Blumenfeld | Auxiliary wave propagating and directing attachment for loudspeaker diaphragms |
US3153463A (en) * | 1961-08-30 | 1964-10-20 | Muter Company | Compound loudspeaker diaphragm |
US3213209A (en) * | 1962-08-07 | 1965-10-19 | Eduart R Doelitzsch | Loudspeaker |
JPS5343515A (en) * | 1976-09-30 | 1978-04-19 | Matsushita Electric Ind Co Ltd | Diaphragm for speaker |
JPS5379525A (en) * | 1976-12-23 | 1978-07-14 | Sony Corp | Compound diaphtagm for speakers |
JPS603277B2 (en) * | 1978-06-15 | 1985-01-26 | ソニー株式会社 | speaker device |
JPS5527702A (en) * | 1978-08-18 | 1980-02-28 | Sony Corp | Vibrator for speaker |
GB2059717B (en) * | 1979-09-25 | 1984-04-04 | Victor Company Of Japan | Speaker diaphragm assembly and a method of manufacturing the same |
GB2062408B (en) * | 1979-10-02 | 1984-02-22 | Victor Company Of Japan | Speaker |
US4472604A (en) * | 1980-03-08 | 1984-09-18 | Nippon Gakki Seizo Kabushiki Kaisha | Planar type electro-acoustic transducer and process for manufacturing same |
NL8301653A (en) * | 1983-05-10 | 1984-12-03 | Philips Nv | ELECTRO-ACOUSTIC CONVERTER WITH AN AIR-PERMISSIBLE MEMBRANE. |
GB2169471A (en) * | 1985-01-04 | 1986-07-09 | Anthony Bernard Clarke | Acoustic diaphragm |
-
1985
- 1985-03-05 DE DE19853507726 patent/DE3507726A1/en active Granted
-
1986
- 1986-02-24 NO NO860671A patent/NO860671L/en unknown
- 1986-02-28 EP EP86102605A patent/EP0193886A3/en not_active Withdrawn
- 1986-03-04 DK DK97486A patent/DK97486A/en not_active Application Discontinuation
- 1986-03-04 US US06/836,026 patent/US4764968A/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB301437A (en) * | 1919-11-18 | 1928-11-27 | Adrain Francis Sykes | Improvements in electrodynamic loudspeakers |
DE709710C (en) * | 1935-02-16 | 1941-08-25 | Zeiss Ikon Akt Ges | Membrane for acoustic devices |
FR1348004A (en) * | 1962-01-15 | 1964-01-04 | Akg Akustische Kino Geraete | Diaphragm for acoustic devices |
GB2010637A (en) * | 1977-11-26 | 1979-06-27 | Sony Corp | Diaphragm for loudspeaker |
GB2079564A (en) * | 1978-08-18 | 1982-01-20 | Sony Corp | Loudspeaker diaphragms |
GB2114397A (en) * | 1982-02-04 | 1983-08-17 | Philips Nv | Flat-diaphragm electrodynamic transducer |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0270981A2 (en) * | 1986-12-06 | 1988-06-15 | EWD Electronic-Werke Deutschland GmbH | Loudspeaker |
EP0270981A3 (en) * | 1986-12-06 | 1990-05-16 | EWD Electronic-Werke Deutschland GmbH | Loudspeaker |
WO1991019405A1 (en) * | 1990-06-08 | 1991-12-12 | Simon Paul Carrington | Loudspeaker with a diaphragm having an air conduit |
GB2261136A (en) * | 1990-06-08 | 1993-05-05 | Simon Paul Carrington | Loudspeaker with a diaphragm having an air conduit |
GB2261136B (en) * | 1990-06-08 | 1995-02-15 | Simon Paul Carrington | Loudspeaker with an oscillator having a coiled tubular chamber |
US5721786A (en) * | 1990-06-08 | 1998-02-24 | Carrington; Simon Paul | Loudspeakers |
Also Published As
Publication number | Publication date |
---|---|
US4764968A (en) | 1988-08-16 |
DK97486D0 (en) | 1986-03-04 |
DE3507726A1 (en) | 1986-09-11 |
DE3507726C2 (en) | 1992-05-14 |
EP0193886A3 (en) | 1988-01-27 |
DK97486A (en) | 1986-09-06 |
NO860671L (en) | 1986-09-08 |
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Inventor name: KREITMEIER, LEONHARD |