EP0659031A1 - Suspension for cone loudspeaker - Google Patents
Suspension for cone loudspeaker Download PDFInfo
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- EP0659031A1 EP0659031A1 EP94118843A EP94118843A EP0659031A1 EP 0659031 A1 EP0659031 A1 EP 0659031A1 EP 94118843 A EP94118843 A EP 94118843A EP 94118843 A EP94118843 A EP 94118843A EP 0659031 A1 EP0659031 A1 EP 0659031A1
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- European Patent Office
- Prior art keywords
- bead
- membrane
- diaphragm
- upper edge
- edge
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- 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.)
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/16—Mounting or tensioning of diaphragms or cones
- H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
- H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
Definitions
- the invention is concerned with the suspension of cone speakers, in particular with the formation of high-temperature-resistant beads and their attachment to the membrane and the speaker basket.
- Cone speakers essentially consist of a conical membrane, a magnet system, a voice coil and a speaker basket.
- the magnet system is connected to the speaker basket.
- the membrane is connected to the voice coil and inserted into the loudspeaker basket, the voice coil being immersed in the air gap formed in the magnet system.
- the upper edge of the membrane is connected to the speaker basket. Special requirements are attached to this connection between the diaphragm and the speaker cage. In particular, it is required that the connection between the diaphragm and the loudspeaker basket provide the stroke with a uniform resistance over the entire travel of the diaphragm.
- connection between the upper edge of the membrane and the inner edge of the bead and the connection between the outer edge of the bead and the speaker basket are designed as adhesive connections. Because of the high mechanical load on the last-mentioned connection, high-quality adhesives are necessary, which must be carefully matched to the materials to be connected. Due to the high mechanical stress on the adhesive connections, the free choice of material between beads and membrane material is limited, because even carefully coordinated adhesives are not able to permanently bond all possible material combinations between membrane, beads and basket material. Furthermore, the choice of materials is further restricted if the loudspeakers are operated at high ambient temperatures (approximately greater than 100 ° C.). This is due to the fact that many materials already soften in this temperature range. But even with materials that are not critical in the temperature range mentioned, problems can arise with regard to the mechanical strength of the adhesive connections, since the majority of these connections already lose their original strength above 100 ° C.
- the invention has for its object to provide a suspension for cone speakers, which is temperature resistant above 100 ° C to about 230 ° C.
- the bead is formed from an injectable, high-temperature-resistant elastomer and that the inner edge of the bead is connected to the upper edge of the membrane in that the upper edge of the membrane is extrusion-coated with the bead material.
- the bead itself is made of silicone or a fluoroelastomer, the bead has a high temperature resistance without the required elastic properties being lost. For this reason, loudspeakers designed in this way can also be used particularly well for sound insulation in temperature-stressed exhaust gas flows. If the bead is formed from a fluoroelastomer, this has the advantage that such beads have an even better temperature resistance and an increased resistance to solvents compared to silicone beads. Problems with regard to the connection of the beads made of elastomer material with the membrane are eliminated by the fact that the bead is molded onto the upper edge of the membrane.
- metal membranes have the advantage over the conventionally used paper or plastic membranes that they have a high stability and can also be used without problems in the temperature range above 100 ° C.
- a particularly stable connection between the inner edge of the bead and the upper edge of the membrane is provided when the upper edge of the membrane is perforated, since this ensures that the areas located on both sides of the membrane are covered after the upper edge of the membrane is encapsulated Bead material are connected through the openings of the membrane with bead material.
- the attachment of the outer edge of the bead with the speaker basket is realized according to claim 4 so that the outer edge of the bead is clamped between the bearing ring surface of the speaker basket and a circumferential ring in order to achieve the necessary sealing of areas in front and behind the membrane.
- the latter can be implemented very simply, for example, by screw or rivet connections being guided through the bearing ring surface of the basket, the outer edge of the bead and the circumferential ring.
- a particularly simple connection of the outer edge of the bead and bearing ring surface of the loudspeaker basket is given according to claim 5 when the outer edge of the bead has a circumferential ring, the at least one annular surface of which is encapsulated with bead material and that the annular surface coated with bead material opposes the circumferential ring the bearing ring surface of the speaker cage is pressed.
- the fixing of the circumferential ring during the connection to the speaker basket can be omitted.
- the necessary contact pressure acting on the outer edge of the bead can be achieved by means of appropriate screw and rivet connections, which are guided through the circumferential ring, the outer edge of the bead and the bearing ring surface of the speaker cage. will be realized.
- the spray connection between membrane and bead or between the circumferential ring and bead is further improved if the injection areas of these components have been coated with an adhesion promoter according to claim 5 before the vulcanization of the bead material.
- FIG. 1 shows a section through a cone loudspeaker in the area of the suspension.
- Reference number 10 denotes the loudspeaker basket and reference number 11 denotes the membrane.
- the speaker 10 is provided with a bearing ring surface 12.
- the bead 13 formed from silicone material extends between the speaker basket 10 and the membrane 11.
- the silicone material used was Siloprene HV3 from the manufacturer BASF, which has a hardness of approximately 50 Shore A. If the bead 13 is to be particularly temperature-resistant and solvent-resistant, it should be made from a fluoroelastomer. In this case, the material with the "Viton" brand name from Dupont and the material with the "Fluorel” brand name from 3M have proven to be particularly good fluoroelastomer materials.
- the outer edge 14 of the bead 13 lies on the bearing ring surface 12.
- a circumferential ring 15 is placed on the side of the outer edge 14 of the bead 13 facing away from the bearing ring surface 12.
- This circumferential ring 15 is formed from aluminum in the present exemplary embodiment and can also be formed from a different material in another exemplary embodiment (not shown here).
- the outer edge 14 of the bead 13 is clamped between the circumferential ring 15 and the bearing ring surface 12 by a screw 16 being guided through the ring 15, the outer edge 14 of the bead 13 and the loudspeaker basket 10.
- a curved area 17 adjoins the outer edge 14 of the bead 13 in the direction of the membrane 11, which merges into the inner and also annular shape of the inner edge 18 of the bead 13.
- This inner edge 18 of the bead 13 covers the upper edge 19 of the membrane 11 on both sides.
- the upper edge 19 of the membrane 11 has a peripheral one Perforation on.
- These perforations 20, which form the perforation, of which only four are shown in FIG. 3, are round in the present exemplary embodiment and have a diameter of 1.5 mm and a distance A of approximately 3 mm from the peripheral edge 21 of the membrane 11. The mutual The distance between the openings is about 10 mm.
- the openings 20 in the membrane 11 are filled with bead material, so that the areas of the lower edge 18 of the bead 13 above and below the membrane 11 are connected to one another through the membrane 11.
- a further improvement in the mechanical strength of the connection between membrane 11 and bead 13 can be brought about in that the interfaces of membrane 11, which are in contact with bead material, are pretreated with a layer of adhesion promoter (not shown).
- the membrane 11 shown in connection with FIGS. 1 and 3 is made of aluminum with a wall thickness of 0.2 mm. Although the best experience has been made with aluminum as the membrane material in the arrangement shown in FIG. 1, the invention is not restricted to the use of aluminum as the membrane material. Rather, all materials are suitable which do not undergo any deformation in the upper edge region 19 when the bead 13 is vulcanized using the respectively selected spraying technique.
- the upper mold 22 and the lower mold 23 of the injection mold shown. Since the spray channels 24 are designed only in the upper mold 22, despite the relatively low spray pressures of up to 60 bar when vulcanizing the bead 13 to the upper edge 19 of the membrane 11, it cannot be ruled out that the otherwise very stable aluminum membrane 11 does not is deformed under the influence of the acting spray pressures in the area with which it projects into the spray space formed by the two molds 22, 23. For this reason, the shoulder 25 is formed in the lower mold 23, which supports the upper edge 19 of the membrane 11 near its peripheral edge 21 in the injection mold.
- FIG. 2 differs from the embodiment according to FIG. 1 only by a modified connection between the outer edge 14 of the bead 13 and the loudspeaker basket 10 and by a modified design of the connection between the inner edge 18 of the bead 13 and the membrane 11.
- the circumferential ring 15 ' is integrated into the outer edge 14 of the bead 13, specifically in that the ring 15' is inserted into the injection mold (not shown) before the bead 13 is vulcanized, so that it vulcanizes the bead 13 connects with this.
- the upper edge 14 of the bead 13 is connected in the embodiment shown in Figure 2 with rivets 26 to the speaker basket 10, so that in the connected state the areas of the upper edge 19 of the membrane 11, which are connected to the lower annular surface of the circumferential ring 15 'are vulcanized, are pressed against the bearing ring surface 12 to produce the necessary seal.
- the upper edge 19 of the membrane 11 is also coated on both sides with bead material.
- the regions of the inner edge 18 of the bead 13 located on both sides of the membrane 11 are connected to one another by the openings 20 in the membrane.
- the lower shape 23 in FIG. 2 does not have the shoulder 25. Damage to the end of the upper edge 19 of the membrane 11 projecting into the molding space is not to be feared, however, since the lower mold also has 23 spray channels. The latter ensures that when vulcanizing the bead 13 on both sides of the membrane 11 prevailing in the area 19 uniform pressure conditions, which prevents damage to the upper edge 19 during the vulcanization of the bead 13.
- the ring 15 according to FIG. 2 does not necessarily have to be smooth-walled. Rather, this ring 15 can also be provided with openings and depressions in order to improve the fastening of the ring 15 'to the outer edge 14 of the bead 13 during the vulcanization.
- the openings 20 in the membrane 11 have the same distance from the axis of rotation 27.
- the perforation of the upper edge of the bead is also not limited to round openings 20.
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- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Road Signs Or Road Markings (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
Description
Die Erfindung befaßt sich mit der Aufhängung von Konuslautsprechern, insbesondere mit der Ausbildung von hochtemperaturfesten Ausbildungen von Sicken und deren Befestigung mit der Membran und dem Lautsprecherkorb.The invention is concerned with the suspension of cone speakers, in particular with the formation of high-temperature-resistant beads and their attachment to the membrane and the speaker basket.
Konuslautsprecher bestehen im wesentlichen aus einer konischen Membran, einem Magnetsystem, einer Schwingspule und einem Lautsprecherkorb. Dabei ist das Magnetsystem mit dem Lautsprecherkorb verbunden. Die Membran ist mit der Schwingspule verbunden und in den Lautsprecherkorb eingesetzt, wobei die Schwingspule in den im Magnetsystem gebildeten Luftspalt eintaucht. Der obere Rand der Membran ist mit dem Lautsprecherkorb verbunden. An diese Verbindung zwischen Membran und Lautsprecherkorb werden besondere Voraussetzungen geknüpft. Insbesondere wird verlangt, daß die Verbindung zwischen Membran und Lautsprecherkorb über den gesamten Hubweg der Membran dem Hub einen gleichmäßigen Widerstand entgegenbringt. Um diese Forderung zu erfüllen haben sich heute Anordnungen durchgesetzt, die als Sicken bezeichnet werden und welche mit dem oberen Rand der Membran verbunden sind, den Zwischenraum zwischen Membran und Lautsprecherkorb überspannen und mit dem Lautsprecherkorb verbunden sind. Derartige Sicken, welche in etwa kreisringförmig ausgebildet sind, sind entweder aus Gummi oder Kunststoff gebildet, da nur diese Werkstoffe die geforderten Elastizitätsvoraussetzungen erfüllen. Der Bereich, in welchem die Sicke den Abstand zwischen dem oberen Rand der Membran und dem Befestigungsbereich am Lautsprecherkorb überspannt, ist zumeist gewölbt ausgebildet.Cone speakers essentially consist of a conical membrane, a magnet system, a voice coil and a speaker basket. The magnet system is connected to the speaker basket. The membrane is connected to the voice coil and inserted into the loudspeaker basket, the voice coil being immersed in the air gap formed in the magnet system. The upper edge of the membrane is connected to the speaker basket. Special requirements are attached to this connection between the diaphragm and the speaker cage. In particular, it is required that the connection between the diaphragm and the loudspeaker basket provide the stroke with a uniform resistance over the entire travel of the diaphragm. In order to meet this requirement, arrangements which are referred to as beads and which are connected to the upper edge of the membrane, span the space between the membrane and the loudspeaker basket and are connected to the loudspeaker basket have become established today. Such beads, which are approximately circular, are either made of rubber or plastic, since only these materials meet the required elasticity requirements. Of the The area in which the bead spans the distance between the upper edge of the membrane and the fastening area on the loudspeaker basket is usually arched.
Die Verbindung zwischen dem oberen Rand der Membran und dem inneren Rand der Sicke sowie die Verbindung zwischen dem äußeren Rand der Sicke und dem Lautsprecherkorb sind als Klebeverbindungen ausgeführt. Wegen der hohen mechanischen Belastung der letztbenannten Verbindung sind hochwertige Klebstoffe notwendig, die auf die zu verbindenden Werkstoffe sorgfältig abgestimmt sein müssen. Bedingt durch die hohe mechanische Belastung der Klebeverbindungen ist jedoch die freie Materialauswahl zwischen Sicken- und Membranwerkstoff beschränkt, weil auch sorgfältig abgestimmte Klebstoffe nicht in der Lage sind, alle in Frage kommenden Materialkombinationen zwischen Membran-, Sicken- und Korbmaterial dauerhaft zu verbinden. Ferner wird die Materialauswahl weiter dadurch eingeschränkt, wenn die Lautsprecher bei hohen Umgebungstemperaturen (etwa größer 100°C) betrieben werden. Dies beruht darauf, da viele Werkstoffe bereits in diesem Temperaturbereich erweichen. Aber auch bei Werkstoffen, die in dem genannten Temperaturbereich unkritisch sind, können Probleme hinsichtlich der mechanischen Festigkeit der Klebeverbindungen haben, da die Mehrzahl dieser Verbindungen schon oberhalb von 100°C ihre ursprüngliche Festigkeit einbüßen.The connection between the upper edge of the membrane and the inner edge of the bead and the connection between the outer edge of the bead and the speaker basket are designed as adhesive connections. Because of the high mechanical load on the last-mentioned connection, high-quality adhesives are necessary, which must be carefully matched to the materials to be connected. Due to the high mechanical stress on the adhesive connections, the free choice of material between beads and membrane material is limited, because even carefully coordinated adhesives are not able to permanently bond all possible material combinations between membrane, beads and basket material. Furthermore, the choice of materials is further restricted if the loudspeakers are operated at high ambient temperatures (approximately greater than 100 ° C.). This is due to the fact that many materials already soften in this temperature range. But even with materials that are not critical in the temperature range mentioned, problems can arise with regard to the mechanical strength of the adhesive connections, since the majority of these connections already lose their original strength above 100 ° C.
Daher liegt der Erfindung die Aufgabe zugrunde, eine Aufhängung für Konuslautsprecher anzugeben, welche auch oberhalb von 100°C bis etwa 230°C temperaturfest ist.Therefore, the invention has for its object to provide a suspension for cone speakers, which is temperature resistant above 100 ° C to about 230 ° C.
Diese Aufgabe wird dadurch gelöst, daß gemäß Anspruch 1 die Sicke aus einem spritzfähigen, hochtemperaturfesten Elastomer gebildet ist und daß der innere Rand der Sicke mit dem oberen Rand der Membran dadurch verbunden ist, daß der obere Rand der Membran mit dem Sickenmaterial umspritzt ist.This object is achieved in that the bead is formed from an injectable, high-temperature-resistant elastomer and that the inner edge of the bead is connected to the upper edge of the membrane in that the upper edge of the membrane is extrusion-coated with the bead material.
Vorteilhafte Aus- und Weiterbildungen der Erfindung sind den Ansprüchen 2 bis 8 entnehmbar.Advantageous further developments of the invention can be found in claims 2 to 8.
Dadurch, daß die Sicke selbst aus Silikon oder einem Fluorelastomer gebildet ist, ist eine hohe Temperaturfestigkeit der Sicke gegeben, ohne daß die geforderten Elastizitätseigenschaften verlorengehen. Aus diesem Grunde lassen sich derart ausgebildete Lautsprecher auch besonders gut zur Schalldämpfung in temperaturbelasteten Abgasströmen einsetzen. Wird die Sicke aus einem Fluorelastomer gebildet, hat dies den Vorteil, daß derartige Sicken gegenüber Sicken aus Silikon eine noch bessere Temperaturfestigkeit und eine gesteigerte Lösmittelbeständigkeit haben. Probleme im Bezug auf die Verbindung der aus Elastomermaterial hergestellten Sicken mit der Membaran sind dadurch ausgeschlossen, daß die Sicke am oberen Rand der Membran angespritzt ist.Because the bead itself is made of silicone or a fluoroelastomer, the bead has a high temperature resistance without the required elastic properties being lost. For this reason, loudspeakers designed in this way can also be used particularly well for sound insulation in temperature-stressed exhaust gas flows. If the bead is formed from a fluoroelastomer, this has the advantage that such beads have an even better temperature resistance and an increased resistance to solvents compared to silicone beads. Problems with regard to the connection of the beads made of elastomer material with the membrane are eliminated by the fact that the bead is molded onto the upper edge of the membrane.
Wird gemäß Anspruch 2 die Membran aus Metall gebildet, sind Deformationen der Membran unter Einfluß der Spritzdrücke nicht zu befürchten. Außerdem haben Metallmembranen gegenüber den herkömmlich verwendeten Papier- oder Kunststoffmembranen den Vorteil, daß sie eine hohe Stabilität aufweisen und außerdem im Temperaturbereich oberhalb 100°C problemlos verwendet werden können.If the membrane is formed from metal according to claim 2, deformations of the membrane under the influence of the injection pressures are not to be feared. In addition, metal membranes have the advantage over the conventionally used paper or plastic membranes that they have a high stability and can also be used without problems in the temperature range above 100 ° C.
Eine besonders stabile Verbindung zwischen dem inneren Rand der Sicke und dem oberen Rand der Membran ist dann gegeben, wenn der obere Rand der Membran perforiert ist, denn hierdurch wird sichergestellt, daß nach dem Umspritzen des oberen Randes der Membran die beidseitig der Membran befindlichen Bereiche aus Sickenmaterial durch die Durchbrüche der Membran hindurch mit Sickenmaterial verbunden sind.A particularly stable connection between the inner edge of the bead and the upper edge of the membrane is provided when the upper edge of the membrane is perforated, since this ensures that the areas located on both sides of the membrane are covered after the upper edge of the membrane is encapsulated Bead material are connected through the openings of the membrane with bead material.
Die Befestigung des äußeren Randes der Sicke mit dem Lautsprecherkorb ist gemäß Anspruch 4 so realisiert, daß der äußere Rand der Sicke zwischen der Lagerringfläche des Lautprecherkorbs und einem umlaufenden Ring eingespannt ist, um die notwendige Abdichtung von vor und hinter der Membran gelegenen Bereichen zu erzielen. Letzteres kann beispielsweise sehr einfach dadurch realisiert sein, daß Schraub- oder Nietverbindungen durch die Lagerringfläche des Korbes, den äußeren Rand der Sicke und den umlaufenden Ring geführt sind.The attachment of the outer edge of the bead with the speaker basket is realized according to claim 4 so that the outer edge of the bead is clamped between the bearing ring surface of the speaker basket and a circumferential ring in order to achieve the necessary sealing of areas in front and behind the membrane. The latter can be implemented very simply, for example, by screw or rivet connections being guided through the bearing ring surface of the basket, the outer edge of the bead and the circumferential ring.
Eine besonders einfache Verbindung vom äußeren Rand der Sicke und Lagerringfläche des Lautsprecherkorb ist gemäß Anspruch 5 dann gegeben, wenn der äußere Rand der Sicke einen umlaufenden Ring aufweist, dessen zumindest eine Kreisringfläche mit Sickenmaterial umspritzt ist und daß die mit Sickenmaterial beschichtete Kreisringfläche des umlaufenden Rings gegen die Lagerringfläche des Lautsprecherkorbes gepreßt ist. In diesem Fall kann die Fixierung des umlaufenden Ringes während des Verbindens mit dem Lautsprecherkorb unterbleiben. Der notwendige und auf den äußeren Rand der Sicke wirkende Anpreßdruck kann durch entsprechende Schraub- und Nietverbindungen, welche durch den umlaufenden Ring, den äußeren Rand der Sicke und die Lagerringfläche des Lautsprecherkorbes geführt sind, realisiert werden.A particularly simple connection of the outer edge of the bead and bearing ring surface of the loudspeaker basket is given according to claim 5 when the outer edge of the bead has a circumferential ring, the at least one annular surface of which is encapsulated with bead material and that the annular surface coated with bead material opposes the circumferential ring the bearing ring surface of the speaker cage is pressed. In this case, the fixing of the circumferential ring during the connection to the speaker basket can be omitted. The necessary contact pressure acting on the outer edge of the bead can be achieved by means of appropriate screw and rivet connections, which are guided through the circumferential ring, the outer edge of the bead and the bearing ring surface of the speaker cage. will be realized.
Die Spritzverbindung zwischen Membran und Sicke bzw. zwischen den umlaufenden Ring und Sicke ist weiter verbessert, wenn die Anspritzbereiche dieser Bauteile gemäß Anspruch 5 vor dem Anvulkanisieren des Sickenmaterials mit einem Haftvermittler beschichtet worden sind.The spray connection between membrane and bead or between the circumferential ring and bead is further improved if the injection areas of these components have been coated with an adhesion promoter according to claim 5 before the vulcanization of the bead material.
Es zeigen:
- Figur 1
- einen Schnitt durch einen Konuslautsprecher im Bereich der Aufhängung;
- Figur 2
- eine weitere Darstellung gemäß Figur 1; und
- Figur 3
- eine Draufsicht auf eine Membran
- Figure 1
- a section through a cone speaker in the area of the suspension;
- Figure 2
- a further representation according to Figure 1; and
- Figure 3
- a top view of a membrane
Die Erfindung soll nun anhand der Figuren näher erläutert werden.The invention will now be explained in more detail with reference to the figures.
In Figur 1 ist ein Schnitt durch einen Konuslautsprecher im Bereich der Aufhängung gezeigt. Mit Bezugszeichen 10 ist der Lautsprecherkorb und mit Bezugszeichen 11 ist die Membran bezeichnet Der Lautsprecher 10 ist mit einer Lagerringfläche 12 versehen. Zwischen dem Lautsprecherkorb 10 und der Membran 11 erstreckt sich die aus Silikonmaterial gebildete Sicke 13. Als Silikonwerkstoff wurde Silopren HV3 des Herstellers BASF verwendet, der eine Härte von etwa 50 Shore A aufweist. Soll die Sicke 13 besonders temperaturfest und lösmittelbeständig ausgebildet sein, sollte diese aus einem Fluorelastomer gebildet werden. In diesem Fall haben sich der Werkstoff mit der Markenbezeichnung "Viton" der Firma Dupont und der Werkstoff mit der Markenbezeichnung "Fluorel" der Firma 3M als besonders gute Fluorelastomere-Werkstoffe erwiesen.FIG. 1 shows a section through a cone loudspeaker in the area of the suspension.
Der äußere Rand 14 der Sicke 13 liegt auf der Lagerringfläche 12 auf. Auf der der Lagerringfläche 12 abgewandten Seite des äußeren Randes 14 der Sicke 13 ist ein umlaufender Ring 15 aufgelegt. Dieser umlaufende Ring 15 ist im vorliegenden Ausführungsbeispiel aus Aluminium gebildet und kann in einem anderen - hier nicht dargestellten - Ausführungsbeispiel auch aus einem anderen Werkstoff gebildet sein. Der äußere Rand 14 der Sicke 13 ist zwischen dem umlaufenden Ring 15 und der Lagerringfläche 12 eingeklemmt, indem eine Schraube 16 durch den Ring 15, den äußeren Rand 14 der Sicke 13 und den Lautsprecherkorb 10 geführt ist. Da die Lagerringfläche 12 und der äußere Rand 14 der Sicke 13 kreisringförmige Gestalt haben, ist es notwendig, den äußeren Rand 14 der Sicke 13 durch eine Mehrzahl von Schrauben 16 mit dem Lautsprecherkorb 10 zu verbinden, um die notwendige Abdichtung zwischen vor und hinter der Membran 11 gelegenen Bereichen herbeizuführen.The
An den äußeren Rand 14 der Sicke 13 schließt in Richtung zur Membran 11 ein gewölbter Bereich 17 an, der in den inneren und ebenfalls kreisringförmige Gestalt habenden inneren Rand 18 der Sicke 13 übergeht. Dieser innere Rand 18 der Sicke 13 bedeckt den oberen Rand 19 der Membran 11 beidseitig.A
Wie Figur 3 in diesem Zusammenhang offenbart, weist der obere Rand 19 der Membran 11 eine umlaufende Perforation auf. Diese - die Perforation bildenden - Durchbrüche 20, wovon in Figur 3 nur vier dargestellt sind, sind im vorliegenden Ausführungsbeispiel rund ausgebildet und haben einen Durchmesser von 1,5 mm und einen Abstand A von etwa 3 mm zum Umfangsrand 21 der Membran 11. Der gegenseitige Abstand der Durchbrüche beträgt etwa 10 mm.As disclosed in this context in FIG. 3, the
Deutlich ist aus Figur 1 entnehmbar, daß die Durchbrüche 20 in der Membran 11 mit Sickenmaterial ausgefüllt sind, so daß die oberhalb und unterhalb der Membran 11 anliegenden Bereiche des unteren Randes 18 der Sicke 13 durch die Membran 11 hindurch miteinander verbunden sind. Hierdurch wird eine hohe mechanische Festigkeit der Verbindung zwischen Membran 11 und der Sicke 13 hervorgerufen. Eine weitere Verbesserung der mechanischen Festigkeit der Verbindung zwischen Membran 11 und Sicke 13 kann dadurch hervorgerufen werden, daß die Grenzflächen der Membran 11, die mit Sickenmaterial in Berührung stehen mit einer Lage Haftvermittler (nicht dargestellt) vorbehandelt sind.It can be clearly seen from FIG. 1 that the
Die im Zusammenhang mit den Figuren 1 und 3 dargestellte Membran 11 ist aus Aluminium mit einer Wandstärke von 0,2 mm gebildet. Obwohl mit Aluminium als Membranmaterial bei der in Figur 1 dargestellten Anordnung die besten Erfahrungen gemacht wurden, ist die Erfindung nicht auf die Anwendung von Aluminium als Membranmaterial beschränkt. Vielmehr sind alle Materialien geeignet, die unter Anwendung der jeweils gewählten Spritztechnik beim Anvulkanisieren der Sicke 13 keine Verformung im oberen Randbereich 19 erleiden.The
Um letzteres näher zu verdeutlichen ist in Figur 1 im Übergangsbereich von Membran 11 und Sicke 13 ausschnittsweise die obere Form 22 und die untere Form 23 des Spritzwerkzeugs gezeigt. Da die Spritzkanäle 24 nur in der oberen Form 22 ausgeführt sind, kann trotz der relativ niedrigen Spritzdrücke von bis 60 bar beim Anvulkanisieren der Sicke 13 an den oberen Rand 19 der Membran 11 nicht ausgeschlossen werden, daß auch die ansonsten sehr stabile Aluminiummembran 11 nicht doch unter dem Einfluß der wirkenden Spritzdrücke in dem Bereich verformt wird, mit welchem sie in den von den beiden Formen 22, 23 gebildeten Spritzraum ragt. Aus diesem Grund ist in der unteren Form 23 der Absatz 25 ausgebildet, welcher den oberen Rand 19 der Membran 11 nahe ihrem Umfangsrand 21 im Spritzwerkzeug unterstützt.To clarify the latter in more detail in FIG. 1 in the transition area of
Die in Figur 2 gezeigte Ausführungsform unterscheidet sich von der Ausführungsform gemäß Figur 1 nur durch eine geänderte Verbindung zwischen dem äußerem Rand 14 der Sicke 13 mit dem Lautsprecherkorb 10 sowie durch eine abgewandelte Ausbildung der Verbindung zwischen innerem Rand 18 der Sicke 13 und der Membran 11.The embodiment shown in FIG. 2 differs from the embodiment according to FIG. 1 only by a modified connection between the
In den äußeren Rand 14 der Sicke 13 ist der umlaufende Ring 15' integriert, und zwar dadurch, daß der Ring 15' vor dem Vulkanisieren der Sicke 13 in das Spritzwerkzeug (nicht dargestellt) eingelegt wird, so daß er sich beim Vulkanisieren der Sicke 13 mit dieser verbindet. Durch die Einheit von äußerem Rand 14 und Ring 15' wird die Verbindung der Sicke 13 mit dem Lautsprecherkorb 10 vereinfacht, weil eine Justage des Rings gemaß Figur 1 beim Verbinden entfällt.The circumferential ring 15 'is integrated into the
Der obere Rand 14 der Sicke 13 ist im in Figur 2 dargestellten Ausführungsbeispiel mit Nieten 26 mit dem Lautsprecherkorb 10 verbunden, so daß im verbundenen Zustand die Bereiche des oberen Randes 19 der Membran 11, welche an die untere Kreisringfläche des umlaufenden Ringes 15' anvulkanisiert sind, zur Herstellung der notwendigen Abdichtung gegen die Lagerringfläche 12 gepreßt sind.The
Der obere Rand 19 der Membran 11 ist ebenfalls beidseitig mit Sickenmaterial beschichtet. Auch im hier dargestellten Ausführungsbeispiel sind die beiderseits der Membran 11 befindlichen Bereiche des inneren Randes 18 der Sicke 13 durch die Durchbrüche 20 in der Membran miteinander verbunden. Abweichend von Figur 1 weist aber in Figur 2 die untere Form 23 nicht der Absatz 25 auf. Eine Beschädigung des in den Formraum ragenden Endes des oberen Randes 19 der Membran 11 ist dabei aber nicht zu befürchten, da auch die untere Form 23 Spritzkanäle aufweist. Letzteres stellt sicher, daß beim Anvulkanisieren der Sicke 13 beiderseits der Mebran 11 im Bereich 19 gleichmäßige Druckverhältnisse vorherrschend sind, was eine Beschädigung des oberen Randes 19 während des Anvulkanisierens der Sicke 13 ausschließt.The
Abschließend sei darauf hingewiesen, daß der Ring 15 gemäß Figur 2 nicht notwendig glattwandig ausgebildet sein muß. Vielmehr kann dieser Ring 15 auch mit Öffnungen und Vertiefungen versehen sein, um die Befestigung des Ringes 15' mit dem äußeren Rand 14 der Sicke 13 während des Anvulkanisierens zu verbessern.In conclusion, it should be pointed out that the
Auch ist nicht notwendig, daß die Durchbrüche 20 in der Membran 11 gleichen Abstand zur Rotationsachse 27 aufweisen. Ferner ist die Perforation des oberen Randes der Sicke auch nicht auf runde Durchbrüche 20 beschränkt.It is also not necessary that the
Claims (8)
dadurch gekennzeichnet,
characterized,
dadurch gekennzeichnet,
daß die Membran (11) aus Metall gebildet ist.Suspension according to claim 1,
characterized,
that the membrane (11) is formed from metal.
dadurch gekennzeichnet,
daß der obere Rand (19) der Membran (11) eine umlaufende Perforation aufweist, deren Durchbrüche (20) nach dem Umspritzen mit dem Sickenmaterial ausgefüllt sind, so daß die den oberen Rand (19) der Membran (11) beidseitig beschichtenden Bereiche aus Sickenmaterial durch die Durchbrüche (20) der Membran (11) hindurch miteinander verbunden sind.Suspension according to claim 1,
characterized,
that the upper edge (19) of the membrane (11) has a circumferential perforation, the openings (20) of which are filled with the beading material after the extrusion coating, so that the areas of the beading material coating the top edge (19) of the membrane (11) on both sides are connected to one another through the openings (20) of the membrane (11).
dadurch gekennzeichnet,
daß der äußere Rand (14) der Sicke (13) mit dem Lautsprecherkorb (10) so verbunden ist, daß der äußere Rand (14) der Sicke (13) zwischen der Lagerringfläche (12) des Lautsprecherkorbes (12) und einem umlaufenden Ring (15) eingespannt ist.Suspension according to claim 1,
characterized,
that the outer edge (14) of the bead (13) is connected to the speaker basket (10) so that the outer edge (14) of the bead (13) between the bearing ring surface (12) of the speaker basket (12) and a circumferential ring (15) is clamped.
dadurch gekennzeichnet,
daß der äußere Rand (14) der Sicke (13) einen umlaufenden Ring (15') aufweist, dessen zumindest eine Kreisringfläche mit Sickenmaterial umspritzt ist, und daß im verbundenen Zustand von Sicke (13) und Lautsprecherkorb (10) die mit Sickenmaterial beschichtete Kreisringfläche des umlaufenden Ringes (15') gegen die Lagerringfläche (12) des Lautsprecherkorbes (10) gepreßt ist.Suspension according to claim 1,
characterized,
that the outer edge (14) of the bead (13) has a circumferential ring (15 '), the at least one annular surface of which is extrusion-coated with bead material, and that in the connected state of the bead (13) and loudspeaker basket (10) the annular surface coated with bead material of the circumferential ring (15 ') is pressed against the bearing ring surface (12) of the loudspeaker basket (10).
dadurch gekennzeichnet,
daß die Bereiche der Membran (11) oder des umlaufenden Ringes (15, 15'), welche mit dem Sickenmaterial beschichtet sind, einen Haftvermittler zwischen dem Kunststoffmaterial und der Membran (11) bzw. dem umlaufenden Ring (15') aufweisen.Suspension according to claim 1 or claim 5,
characterized,
that the areas of the membrane (11) or the circumferential ring (15, 15 ') which are coated with the bead material have an adhesion promoter between the plastic material and the membrane (11) or the circumferential ring (15').
dadurch gekennzeichnet,
daß das Elastomer, aus welchem die Sicke (13) gebildet ist, ein Silikongummi ist.Suspension according to one of claims 1 to 6,
characterized by
that the elastomer from which the bead (13) is formed is a silicone rubber.
dadurch gekennzeichnet,
daß das Elastomer, aus welchem die Sicke (13) gebildet ist, ein Fluorelastomer ist.Suspension according to one of claims 1 to 6,
characterized by
that the elastomer from which the bead (13) is formed is a fluoroelastomer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4343324A DE4343324A1 (en) | 1993-12-18 | 1993-12-18 | Suspension for cone speakers |
| DE4343324 | 1993-12-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0659031A1 true EP0659031A1 (en) | 1995-06-21 |
| EP0659031B1 EP0659031B1 (en) | 1998-09-23 |
Family
ID=6505427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94118843A Expired - Lifetime EP0659031B1 (en) | 1993-12-18 | 1994-11-30 | Suspension for cone loudspeaker |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5574797A (en) |
| EP (1) | EP0659031B1 (en) |
| JP (1) | JPH07264693A (en) |
| AT (1) | ATE171586T1 (en) |
| DE (2) | DE4343324A1 (en) |
| DK (1) | DK0659031T3 (en) |
| ES (1) | ES2122134T3 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19757098C2 (en) * | 1997-12-20 | 2003-01-09 | Harman Audio Electronic Sys | Suspension for sound reproduction arrangements based on the bending wave principle |
| GB2345402B (en) * | 1998-12-28 | 2000-12-20 | Foster Electric Co Ltd | Improvements in loudspeakers |
| US7149223B2 (en) * | 2000-03-06 | 2006-12-12 | Juniper Networks, Inc. | Enhanced fiber nodes with CMTS capability |
| US20050185816A1 (en) * | 2002-10-16 | 2005-08-25 | Roark Richard S. | Loudspeaker driver having a removable diaphragm assembly, parts kit and method for rebuilding a loudspeaker driver in the field |
| US20040081330A1 (en) * | 2002-10-23 | 2004-04-29 | Hsi-Chung Lin | Speaker with cabinet |
| US20050111689A1 (en) * | 2003-11-21 | 2005-05-26 | True Technologies Inc. | Loudspeaker with assembly and performance improvements |
| CN101026900A (en) * | 2005-09-21 | 2007-08-29 | 桑尼奥霍森斯公司 | Insert molded surround with mechanical support |
| US8224270B2 (en) * | 2006-12-06 | 2012-07-17 | Broadcom Corporation | Method and system for optimizing transmit power of a power amplifier using a battery voltage (Vbat) monitor |
| US20100014703A1 (en) * | 2008-07-18 | 2010-01-21 | Cheng Uei Precision Industry Co., Ltd. | Loudspeaker |
| CN104081792A (en) * | 2011-12-29 | 2014-10-01 | 共达欧洲研究与发展有限责任公司 | Adhesive-free attachment of transducer suspension member |
| JP5400246B1 (en) * | 2013-06-10 | 2014-01-29 | ディービーテクノロジー株式会社 | Speaker and its edge structure |
| CN111818427A (en) * | 2019-04-10 | 2020-10-23 | 鸿富锦精密工业（深圳）有限公司 | Vibration system, speaker and method for manufacturing vibration system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS579195A (en) * | 1980-06-19 | 1982-01-18 | Matsushita Electric Ind Co Ltd | Manufacture for diaphragm for speaker |
| DE3241757A1 (en) * | 1982-11-11 | 1984-05-17 | Elektrotechnik Ehmann Gmbh, 6953 Gundelsheim | Oscillating insert for an electromechanical transducer and method for its manufacture |
| JPS59139791A (en) * | 1984-01-25 | 1984-08-10 | Matsushita Electric Ind Co Ltd | Passive radiator |
| US4881617A (en) * | 1988-12-30 | 1989-11-21 | Alexander Faraone | Radially arcuated speaker cone |
| WO1990003710A1 (en) * | 1988-09-20 | 1990-04-05 | Nokia Unterhaltungselektronik (Deutschland) Gmbh | Membrane with bead |
| US5115474A (en) * | 1988-04-30 | 1992-05-19 | Pioneer Electronic Corporation | Speaker system |
| EP0552040A1 (en) * | 1992-01-15 | 1993-07-21 | Patrick Arthur Leach | Method and apparatus for making a loudspeaker cone and surround assembly |
| WO1993023966A1 (en) * | 1992-05-14 | 1993-11-25 | Yocum Fred D | Loudspeaker cone suspension rim having integral gasket |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU801318A1 (en) * | 1979-01-25 | 1981-01-30 | Ленинградский Ордена Ленина Поли-Технический Институт Им. M.И.Калинина | Method of tensioning metallic membrane |
| DE3640264A1 (en) * | 1986-11-25 | 1988-06-01 | Electronic Werke Deutschland | Loudspeaker |
| US5111510A (en) * | 1989-03-30 | 1992-05-05 | Pioneer Electronic Corporation | Speaker and manufacturing method therefor |
| JP2548580Y2 (en) * | 1989-12-28 | 1997-09-24 | 株式会社 オーディオテクニカ | Dynamic microphone |
| US5123053A (en) * | 1990-07-11 | 1992-06-16 | Harman International Industries, Incorporated | Loudspeaker suspension |
| US5319718A (en) * | 1991-10-11 | 1994-06-07 | Yocum Fred D | Loudspeaker cone and method for making same |
-
1993
- 1993-12-18 DE DE4343324A patent/DE4343324A1/en not_active Withdrawn
-
1994
- 1994-11-30 AT AT94118843T patent/ATE171586T1/en active
- 1994-11-30 DK DK94118843T patent/DK0659031T3/en active
- 1994-11-30 EP EP94118843A patent/EP0659031B1/en not_active Expired - Lifetime
- 1994-11-30 DE DE59406968T patent/DE59406968D1/en not_active Expired - Lifetime
- 1994-11-30 ES ES94118843T patent/ES2122134T3/en not_active Expired - Lifetime
- 1994-12-19 US US08/358,742 patent/US5574797A/en not_active Expired - Lifetime
- 1994-12-19 JP JP6315234A patent/JPH07264693A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS579195A (en) * | 1980-06-19 | 1982-01-18 | Matsushita Electric Ind Co Ltd | Manufacture for diaphragm for speaker |
| DE3241757A1 (en) * | 1982-11-11 | 1984-05-17 | Elektrotechnik Ehmann Gmbh, 6953 Gundelsheim | Oscillating insert for an electromechanical transducer and method for its manufacture |
| JPS59139791A (en) * | 1984-01-25 | 1984-08-10 | Matsushita Electric Ind Co Ltd | Passive radiator |
| US5115474A (en) * | 1988-04-30 | 1992-05-19 | Pioneer Electronic Corporation | Speaker system |
| WO1990003710A1 (en) * | 1988-09-20 | 1990-04-05 | Nokia Unterhaltungselektronik (Deutschland) Gmbh | Membrane with bead |
| US4881617A (en) * | 1988-12-30 | 1989-11-21 | Alexander Faraone | Radially arcuated speaker cone |
| EP0552040A1 (en) * | 1992-01-15 | 1993-07-21 | Patrick Arthur Leach | Method and apparatus for making a loudspeaker cone and surround assembly |
| WO1993023966A1 (en) * | 1992-05-14 | 1993-11-25 | Yocum Fred D | Loudspeaker cone suspension rim having integral gasket |
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| Title |
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| PATENT ABSTRACTS OF JAPAN vol. 6, no. 67 (E - 104) 28 April 1982 (1982-04-28) * |
| PATENT ABSTRACTS OF JAPAN vol. 8, no. 268 (E - 283) 7 December 1984 (1984-12-07) * |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2122134T3 (en) | 1998-12-16 |
| JPH07264693A (en) | 1995-10-13 |
| US5574797A (en) | 1996-11-12 |
| ATE171586T1 (en) | 1998-10-15 |
| DE59406968D1 (en) | 1998-10-29 |
| EP0659031B1 (en) | 1998-09-23 |
| DK0659031T3 (en) | 1999-06-14 |
| DE4343324A1 (en) | 1995-06-22 |
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