EP2577992A1 - Acoustic loudspeaker - Google Patents

Acoustic loudspeaker

Info

Publication number
EP2577992A1
EP2577992A1 EP11726910.0A EP11726910A EP2577992A1 EP 2577992 A1 EP2577992 A1 EP 2577992A1 EP 11726910 A EP11726910 A EP 11726910A EP 2577992 A1 EP2577992 A1 EP 2577992A1
Authority
EP
European Patent Office
Prior art keywords
membrane
magnetic field
winding
periphery
loudspeaker
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
EP11726910.0A
Other languages
German (de)
French (fr)
Other versions
EP2577992B1 (en
Inventor
Arnaud Cazes Bouchet
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.)
Focal JMLab SAS
Original Assignee
Focal-Jmlab (Sa)
Focal JMLab SAS
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 Focal-Jmlab (Sa), Focal JMLab SAS filed Critical Focal-Jmlab (Sa)
Publication of EP2577992A1 publication Critical patent/EP2577992A1/en
Application granted granted Critical
Publication of EP2577992B1 publication Critical patent/EP2577992B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • H04R9/025—Magnetic circuit
    • 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
    • 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
    • H04R7/12—Non-planar diaphragms or cones
    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
    • H04R2209/024—Manufacturing aspects of the magnetic circuit of loudspeaker or microphone transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2231/00—Details of apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor covered by H04R31/00, not provided for in its subgroups
    • H04R2231/003—Manufacturing aspects of the outer suspension of loudspeaker or microphone diaphragms or of their connecting aspects to said diaphragms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/13—Acoustic transducers and sound field adaptation in vehicles

Definitions

  • the invention relates to the field of acoustic loudspeakers, and more particularly of small speakers. It relates more particularly to a new architecture of loudspeakers that allows to very strongly reduce their thickness, that is to say, their dimension measured perpendicularly to the direction of emission of sound.
  • a loudspeaker comprises a mobile membrane mechanically associated with a winding traversed by a current representative of the acoustic signal to be generated.
  • the loudspeaker also comprises a magnetic field source, generally constant, which interacts with the current flowing through the winding to allow movement of the winding and therefore of the membrane.
  • the winding is disposed in a central zone of the membrane which is itself of generally conical shape, between polar parts that can channel the magnetic field generated by the magnetic field source, which is itself below of the membrane. It is understood that the stacking of these different elements is at the expense of the overall thickness of the speaker. In other words, when it is desired to make a conventional speaker of reduced thickness, it is necessary to reduce the angle of the cone of the membrane, or the dimensions of the magnetic field source, with inevitably a degradation. acoustic performance.
  • the acoustic sources are the least thick possible.
  • the integration of loudspeakers in vehicle doors or in various furniture elements can be mentioned.
  • Such a loudspeaker comprises an annular magnetic assembly disposed at the periphery of the membrane. This set comprises several superimposed magnets, whose magnetizations are radial for the central layer, and axial for the peripheral layers. Such an arrangement makes it possible to concentrate the field lines towards the inside of the ring formed by the magnetic assembly, but has the major disadvantage of limiting the height over which the magnetic field is useful. In other words, the excursion of the membrane is limited, which prevents the speaker from being effective at low frequencies.
  • the invention therefore relates to an acoustic loudspeaker which conventionally comprises:
  • a source of constant magnetic field oriented in a plane substantially parallel to the membrane
  • this loudspeaker is characterized in that the magnetic field source is formed of a set of magnetized elements disposed at the periphery of this membrane, around the winding. Each magnetized element has a cylindrical face facing the winding. The magnetic field generated by these magnetized elements has field lines that emerge from the full height of this inner face of the magnetic field source.
  • the invention consists in producing a loudspeaker by arranging the winding around the periphery of the membrane, and positioning the magnetic field source around the membrane, facing the winding.
  • the magnetic field generated by the magnetic elements arranged in a ring is therefore radial, and acts directly on the winding without the need for a pole piece.
  • the field lines generated by the magnets produce a homogeneous force (in direction and amplitude), on the winding, over the potential excursion of the membrane.
  • the outer contour of the membrane, the coil and the magnetic field source are in the same plane, which provides a particularly compact and thin.
  • the speaker according to the invention sees the magnetic field close naturally in the surrounding environment.
  • This apparent disadvantage is offset by the fact that the mass of magnetic material required is globally important, since it occupies the entire periphery of the membrane.
  • the gains in compactness form a largely preponderant advantage.
  • the shape of the membrane may be substantially flat, for example for applications in the low frequencies, or of more complex shape, for use at higher frequencies, where it is necessary to benefit from greater rigidity .
  • This shape can for example be convex, concave, conical.
  • the various magnetized elements are arranged in a ring on the periphery of the membrane in a regular angular distribution, to balance the forces exerted on the coil.
  • Different geometries are possible for these magnetic elements. It is thus possible to have substantially rectilinear elements to form a polygonal global geometry. In this case, it is also possible for the winding to be wound into a polygonal shape corresponding to the shape of the magnetic field source, so as to maintain a substantially constant air gap. It is also possible to use magnetized elements having a curvature complementary to that of the winding, so as to provide a source which has a circular overall shape, and which is therefore at a quasi-constant distance from the winding.
  • the magnetized elements may have a face oriented on the side of the coil which is cylindrical, so as to maintain a constant air gap regardless of the relative position of the coil.
  • the magnetized elements can be mounted inside successive housings made in a frame, itself secured to a fixed point of the installation of the speaker.
  • the loudspeaker comprises a suspension member connected on the one hand to the frame of the magnetic field source, and on the other hand to the periphery of the membrane.
  • This suspension element allows the displacement of the membrane relative to a fixed point.
  • the loudspeaker also comprises a second suspension member, also connected to the frame and the periphery of the membrane, but on the opposite side of the winding with respect to the first suspension member, so as to form a closed volume around the winding .
  • the membrane is connected to the chassis of the loudspeaker by a set of two sheets defining an overall volume of substantially toroidal shape, inside which are enclosed the winding and the magnetic field source. Moisture tightness is thus ensured in particular vis-à-vis the winding.
  • the presence of the second suspension member also makes it possible to improve the power handling by increasing the return force applied to the moving element. This second suspension member improves the guidance of the coil by creating a deformable parallelogram structure.
  • this double suspension makes it possible to balance the mechanical forces with respect to the two directions of movement of the moving equipment, as opposed to single suspension systems.
  • this second suspension member is not mandatory because it adds weight to the moving equipment. This second suspension may therefore be omitted for loudspeakers in the ranges where the displaced mass considerations are preponderant.
  • Figure 1 is a top view of a speaker according to the invention, wherein a portion of one of the suspension members has been masked to reveal the magnetic field source and the winding;
  • Figure 2 is a detail view of a portion of the frame accommodating the magnetized elements.
  • Figure 3 is a cross-sectional view, in slight perspective, of the loudspeaker of Figure 1.
  • Figure 4 is a cross-sectional detail view of a magnet and facing winding, on which the field lines have been shown.
  • the invention therefore relates to a loudspeaker which, as illustrated in FIG. 1, consists essentially of a membrane 2 of circular shape and of substantially flat geometry.
  • This membrane also comprises a winding 3 of circular shape which is mechanically secured to the membrane.
  • the magnetic field source 4 which comprises a frame 5 supporting different magnetized elements 6.
  • the membrane 2 is made in a traditional manner with materials such as, among which may be mentioned, at examples: composite materials (combining glass, aramid or similar fibers, or carbon fibers), metals (especially aluminum, titanium and beryllium), cellulose pulp, polymers such as polypropylene, polyethylene terephthalate (Mylar ® ), or acrylonitrile butadiene styrene (ABS), or even synthetic textiles.
  • the shape of the membrane may be flat for use in the low frequencies, or even more complex (concave, convex, conical) to have a superior rigidity appreciable for operations at higher frequency.
  • the membrane 2 is peripherally extended by a zone 8 accommodating the coil 3 which is wound circularly around the periphery of the membrane 2.
  • the wire used for the winding is of conventional characteristics, and for example based on various electrically conductive materials, and in particular copper, aluminum, and other alloys.
  • the wire section can be optimized to minimize the overall resistance of the coil.
  • the magnetic source 4 consists essentially of magnetized elements 6 in the form of segments angularly distributed on the periphery of the coil 3.
  • these elements 6 may be based on very strong magnetization materials, to compensate the absence of pole piece, and the fact that it is the creepage of these magnetized elements 6 which pass through the coil 3.
  • the magnetization of these elements 6 is therefore chosen so that it is oriented radially, and passes through the winding 3 perpendicularly substantially along the plane of the membrane 2. Materials such as neodymium or the like have a magnetization compatible with these applications.
  • each of the segments may have a face 10 which is curved, more precisely cylindrical, to be at a constant distance from the winding.
  • This face is cylindrical, that is to say that the distance to the coil 3 remains the same regardless of the position of the latter when moving with the membrane.
  • the field lines 20 emerge from the plane face 10 of the magnetized element. These field lines are oriented towards the inside of the loudspeaker, towards the winding 3. In this way, during its movements, the winding 3 positively undergoes the influence of the magnetic field, including in its extreme positions. one of which is illustrated by the dotted winding. Over the entire height of the face 10, the field lines 20 have an overall orientation in the direction of the winding, with a sufficiently homogeneous distribution, which helps to limit the phenomena of distortions.
  • these curved magnetized elements 6 are disposed inside a chassis 4, which has appropriate housings 12. These housings 12 are formed between radial partitions 15 extending between two adjacent magnet elements 6. Means for holding the magnetized elements may be arranged, for example in the form of a bulge 16 located at the end of the partition 15, and of complementary shape to a recess 17 formed on the short sides of the magnetized elements 6. In this way, a quasi-continuity of the magnetic field generated by the magnetized elements 6 is maintained at the boundary between two successive elements.
  • the rear face 19 of the magnetized elements may be flat or curved depending on the type of material used. A wall 18 facing the rear face 19 of the magnetized elements, can advantageously improve the maintenance of these elements 6 on the frame 4.
  • the frame 4 has a peripheral portion 20 for fixing the loudspeaker on its support.
  • the loudspeaker also comprises suspension members 30, 31 illustrated in FIG. 3.
  • Each suspension member 30, 31 has an inner portion 32, 33 which is substantially circular in shape, and secured to one of the faces 34,35 of the membrane 2.
  • the opposite end 36,37 forming the outer periphery of the suspension member 30,31 is itself secured to the frame 4 by various appropriate means as a commitment in a throat made for this purpose or a collage, or any other suitable mechanical device.
  • the portion 38,39 of the suspension member 30,31 located between its two ends 32,33; 36,37 adopts a curved shape, to generate a space 40 encompassing the magnetic field source and the winding.
  • the shape of this central portion 38,39 is chosen to allow the maximum deflection of the membrane 2 without generating mechanical stress.
  • Other forms, for example rectangular, can also give satisfaction.
  • Materials conventionally used to make the suspensions may be employed, such as coated textiles or the like.
  • the loudspeaker according to the invention has multiple advantages, and in particular that of having a particularly reduced thickness with respect to its diameter. It can therefore be advantageously used for applications where congestion constraints are important, and while maintaining good acoustic performance, especially in low frequencies, thanks to the ability to move a relatively large volume of air.

Landscapes

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

Abstract

Acoustic loudspeaker (1) comprising: a movable membrane (2); a source of constant magnetic field (4), a coil mechanically secured to said membrane (2) and interacting with the magnetic field so as to displace the membrane (2), when it is traversed by an alternating current, characterized in that the membrane (2) carries the coil (3) at its periphery, and in that the magnetic field source (1) is formed by a set of at least one magnetized element (6) disposed at the periphery of said membrane (2), around the coil (3), the magnetic field generated by said at least one magnetized element (6) being in a plane parallel to the membrane (2).

Description

HAUT-PARLEUR ACOUSTIQUE  ACOUSTIC SPEAKER
DOMAINE TECHNIQUE L'invention se rattache au domaine des haut-parleurs acoustiques, et plus particulièrement des haut-parleurs de faible encombrement. Elle vise plus particulièrement une nouvelle architecture de haut-parleurs qui permet de réduire très fortement leur épaisseur, c'est-à-dire leur dimension mesurée perpendiculairement à la direction d'émission du son.  TECHNICAL FIELD The invention relates to the field of acoustic loudspeakers, and more particularly of small speakers. It relates more particularly to a new architecture of loudspeakers that allows to very strongly reduce their thickness, that is to say, their dimension measured perpendicularly to the direction of emission of sound.
TECHNIQUES ANTÉRIEURES PRIOR TECHNIQUES
De façon générale, un haut-parleur comprend une membrane mobile associée mécaniquement à un bobinage parcouru par un courant représentatif du signal acoustique à générer. Le haut-parleur comprend également une source de champ magnétique, généralement constant, qui interagit avec le courant parcourant le bobinage pour permettre le déplacement du bobinage et donc de la membrane. In general, a loudspeaker comprises a mobile membrane mechanically associated with a winding traversed by a current representative of the acoustic signal to be generated. The loudspeaker also comprises a magnetic field source, generally constant, which interacts with the current flowing through the winding to allow movement of the winding and therefore of the membrane.
Généralement, le bobinage est disposé dans une zone centrale de la membrane qui est elle-même de forme généralement conique, entre des pièces polaires qui permettent de canaliser le champ magnétique généré par la source de champ magnétique, qui se trouve elle-même en dessous de la membrane. On conçoit que l'empilement de ces différents éléments se fait au détriment de l'épaisseur globale du haut-parleur. En d'autres termes, lorsque l'on souhaite réaliser un haut-parleur classique d'épaisseur réduite, il est nécessaire de diminuer l'angle du cône de la membrane, ou les dimensions de la source de champ magnétique, avec inévitablement une dégradation des performances acoustiques. Generally, the winding is disposed in a central zone of the membrane which is itself of generally conical shape, between polar parts that can channel the magnetic field generated by the magnetic field source, which is itself below of the membrane. It is understood that the stacking of these different elements is at the expense of the overall thickness of the speaker. In other words, when it is desired to make a conventional speaker of reduced thickness, it is necessary to reduce the angle of the cone of the membrane, or the dimensions of the magnetic field source, with inevitably a degradation. acoustic performance.
Or, dans certaines applications, il est nécessaire que les sources acoustiques soient les moins épaisses possibles. On peut citer à titre d'exemple non limitatif l'intégration des haut-parleurs dans des portières de véhicules, ou bien encore dans différents éléments d'ameublement. However, in some applications, it is necessary that the acoustic sources are the least thick possible. By way of nonlimiting example, the integration of loudspeakers in vehicle doors or in various furniture elements can be mentioned.
Un exemple de haut parleur d'épaisseur limitée est décrit dans le document EP 1 553 802. Un tel haut parleur comporte un ensemble magnétique annulaire disposé en périphérie de la membrane. Cet ensemble comporte plusieurs aimants superposés, et dont les aimantations sont radiale pour la couche centrale, et axiales pour les couches périphériques. Une telle disposition permet de concentrer les lignes de champ vers l'intérieur de l'anneau que forme l'ensemble magnétique, mais présente l'inconvénient majeur de limiter la hauteur sur laquelle le champ magnétique est utile. Autrement dit, l'excursion de la membrane est limitée, ce qui empêche à ce haut parleur de pouvoir être efficace à des fréquences basses. An example of a speaker of limited thickness is described in document EP 1 553 802. Such a loudspeaker comprises an annular magnetic assembly disposed at the periphery of the membrane. This set comprises several superimposed magnets, whose magnetizations are radial for the central layer, and axial for the peripheral layers. Such an arrangement makes it possible to concentrate the field lines towards the inside of the ring formed by the magnetic assembly, but has the major disadvantage of limiting the height over which the magnetic field is useful. In other words, the excursion of the membrane is limited, which prevents the speaker from being effective at low frequencies.
EXPOSE DE L'INVENTION SUMMARY OF THE INVENTION
L'invention concerne donc un haut-parleur acoustique qui comporte de façon classique : The invention therefore relates to an acoustic loudspeaker which conventionally comprises:
- une membrane mobile ;  a mobile membrane;
- une source de champ magnétique constant, orienté selon un plan sensiblement parallèle à la membrane,  a source of constant magnetic field, oriented in a plane substantially parallel to the membrane,
- un bobinage mécaniquement solidaire de la périphérie de cette membrane, et interagissant avec le champ magnétique pour déplacer la membrane lorsque la bobine est parcourue par un courant alternatif. Conformément à l'invention, ce haut-parleur se caractérise en ce que la source de champ magnétique est formée d'un ensemble d'éléments aimantés disposés en périphérie de cette membrane, autour du bobinage. Chaque élément aimanté présente une face cylindrique en regard du bobinage. Le champ magnétique généré par ces éléments aimantés présente des lignes de champ qui émergent de toute la hauteur de cette face interne de la source de champ magnétique.  a winding mechanically secured to the periphery of this membrane, and interacting with the magnetic field to move the membrane when the coil is traversed by an alternating current. According to the invention, this loudspeaker is characterized in that the magnetic field source is formed of a set of magnetized elements disposed at the periphery of this membrane, around the winding. Each magnetized element has a cylindrical face facing the winding. The magnetic field generated by these magnetized elements has field lines that emerge from the full height of this inner face of the magnetic field source.
Autrement dit, l'invention consiste à réaliser un haut-parleur en disposant le bobinage sur le pourtour de la membrane, et en positionnant la source de champ magnétique autour de la membrane, en regard du bobinage. Le champ magnétique généré par les éléments magnétiques disposés en couronne est donc radial, et agit directement sur le bobinage sans nécessiter de pièce polaire. Les lignes de champ générées par les aimants produisent une force homogène (en direction et en amplitude), sur le bobinage, sur toute l'excursion potentielle de la membrane. Ainsi, le contour extérieur de la membrane, la bobine et la source de champ magnétique se trouvent dans un même plan, ce qui permet d'obtenir un ensemble particulièrement compact et peu épais. In other words, the invention consists in producing a loudspeaker by arranging the winding around the periphery of the membrane, and positioning the magnetic field source around the membrane, facing the winding. The magnetic field generated by the magnetic elements arranged in a ring is therefore radial, and acts directly on the winding without the need for a pole piece. The field lines generated by the magnets produce a homogeneous force (in direction and amplitude), on the winding, over the potential excursion of the membrane. Thus, the outer contour of the membrane, the coil and the magnetic field source are in the same plane, which provides a particularly compact and thin.
Ainsi, contrairement aux haut-parleurs conventionnels qui comportent des pièces polaires ou des aimants complémentaires canalisant le champ magnétique, le haut-parleur conforme à l'invention voit le champ magnétique se refermer de façon naturelle dans le milieu avoisinant. Cet inconvénient apparent est compensé par le fait que la masse de matériau magnétique nécessaire est globalement importante, puisqu'elle occupe toute la périphérie de la membrane. Par ailleurs, les gains en compacité forment un avantage largement prépondérant. En pratique, la forme de la membrane peut être sensiblement plane, par exemple pour les applications dans les basses fréquences, ou de forme plus complexe, pour une utilisation à des fréquences plus élevées, où il est nécessaire de bénéficier d'une plus grande rigidité. Cette forme peut par exemple être convexe, concave, conique. Thus, unlike conventional loudspeakers which comprise polar parts or complementary magnets channeling the magnetic field, the speaker according to the invention sees the magnetic field close naturally in the surrounding environment. This apparent disadvantage is offset by the fact that the mass of magnetic material required is globally important, since it occupies the entire periphery of the membrane. In addition, the gains in compactness form a largely preponderant advantage. In practice, the shape of the membrane may be substantially flat, for example for applications in the low frequencies, or of more complex shape, for use at higher frequencies, where it is necessary to benefit from greater rigidity . This shape can for example be convex, concave, conical.
Avantageusement, en pratique, les différents éléments aimantés sont disposés en couronne sur la périphérie de la membrane selon une répartition angulaire régulière, pour équilibrer les efforts exercés sur le bobinage. Différentes géométries sont envisageables pour ces éléments aimantés. Il est ainsi possible de disposer des éléments sensiblement rectilignes pour former une géométrie globale polygonale. Dans ce cas là, il est également possible que le bobinage soit enroulé dans une forme polygonale correspondant à la forme de la source de champ magnétique, de manière à conserver un entrefer sensiblement constant. Il est également possible d'utiliser des éléments aimantés présentant une courbure complémentaire à celle du bobinage, de manière à réaliser une source qui présente une forme globale circulaire, et qui se situe donc à une distance quasi-constante du bobinage. Advantageously, in practice, the various magnetized elements are arranged in a ring on the periphery of the membrane in a regular angular distribution, to balance the forces exerted on the coil. Different geometries are possible for these magnetic elements. It is thus possible to have substantially rectilinear elements to form a polygonal global geometry. In this case, it is also possible for the winding to be wound into a polygonal shape corresponding to the shape of the magnetic field source, so as to maintain a substantially constant air gap. It is also possible to use magnetized elements having a curvature complementary to that of the winding, so as to provide a source which has a circular overall shape, and which is therefore at a quasi-constant distance from the winding.
Dans le même ordre d'idée, les éléments aimantés peuvent présenter une face orientée du côté du bobinage qui est cylindrique, de manière à conserver un entrefer constant quelle que soit la position relative du bobinage. In the same vein, the magnetized elements may have a face oriented on the side of the coil which is cylindrical, so as to maintain a constant air gap regardless of the relative position of the coil.
En pratique, les éléments aimantés peuvent être montés à l'intérieur de logements successifs réalisés dans un châssis, lui-même solidaire d'un point fixe de l'installation du haut-parleur. In practice, the magnetized elements can be mounted inside successive housings made in a frame, itself secured to a fixed point of the installation of the speaker.
Selon une autre caractéristique de l'invention, le haut-parleur comporte un organe de suspension relié d'une part au châssis de la source de champ magnétique, et d'autre part à la périphérie de la membrane. Cet élément de suspension permet le déplacement de la membrane par rapport à un point fixe. According to another characteristic of the invention, the loudspeaker comprises a suspension member connected on the one hand to the frame of the magnetic field source, and on the other hand to the periphery of the membrane. This suspension element allows the displacement of the membrane relative to a fixed point.
Avantageusement, le haut-parleur comprend également un second organe de suspension, relié également au châssis et à la périphérie de la membrane, mais du côté opposé du bobinage par rapport au premier organe de suspension, de manière à former un volume fermé autour du bobinage. En d'autres termes, la membrane est reliée au châssis du haut-parleur par un ensemble de deux feuilles définissant un volume global de forme sensiblement torique, à l'intérieur duquel sont enfermés le bobinage et la source de champ magnétique. L'étanchéité à l'humidité est ainsi assurée en particulier vis-à-vis du bobinage. La présence du second organe de suspension permet également d'améliorer la tenue en puissance, en augmentant la force de rappel appliquée sur l'équipage mobile. Ce second organe de suspension améliore le guidage de la bobine en créant une structure de parallélogramme déformable. Par ailleurs, cette double suspension permet de symétriser les efforts mécaniques par rapport aux deux sens de mouvement de l'équipage mobile, par opposition aux systèmes à simple suspension. Toutefois, la présence de ce second organe de suspension n'est pas obligatoire, car elle ajoute du poids à l'équipage mobile. Cette seconde suspension pourra donc être omise pour des haut-parleurs dans les gammes où les considérations de masse déplacée sont prépondérantes. Advantageously, the loudspeaker also comprises a second suspension member, also connected to the frame and the periphery of the membrane, but on the opposite side of the winding with respect to the first suspension member, so as to form a closed volume around the winding . In other words, the membrane is connected to the chassis of the loudspeaker by a set of two sheets defining an overall volume of substantially toroidal shape, inside which are enclosed the winding and the magnetic field source. Moisture tightness is thus ensured in particular vis-à-vis the winding. The presence of the second suspension member also makes it possible to improve the power handling by increasing the return force applied to the moving element. This second suspension member improves the guidance of the coil by creating a deformable parallelogram structure. Moreover, this double suspension makes it possible to balance the mechanical forces with respect to the two directions of movement of the moving equipment, as opposed to single suspension systems. However, the presence of this second suspension member is not mandatory because it adds weight to the moving equipment. This second suspension may therefore be omitted for loudspeakers in the ranges where the displaced mass considerations are preponderant.
DESCRIPTION SOMMAIRE DES FIGURES SUMMARY DESCRIPTION OF THE FIGURES
La manière de réaliser l'invention, ainsi que les avantages qui en découlent, ressortiront bien de la description du mode de réalisation qui suit, à l'appui des figures annexées dans lesquelles : The manner of carrying out the invention, as well as the advantages which result therefrom, will emerge from the description of the embodiment which follows, in support of the appended figures in which:
la figure 1 est une vue de dessus d'un haut-parleur conforme à l'invention, dans laquelle une partie d'un des organes de suspension a été masquée pour laisser apparaître la source de champ magnétique et le bobinage ;  Figure 1 is a top view of a speaker according to the invention, wherein a portion of one of the suspension members has been masked to reveal the magnetic field source and the winding;
la figure 2 est une vue de détail d'une partie du châssis accueillant les éléments aimantés.  Figure 2 is a detail view of a portion of the frame accommodating the magnetized elements.
la figure 3 est une vue en coupe transversale, et en légère perspective, du haut- parleur de la figure 1.  Figure 3 is a cross-sectional view, in slight perspective, of the loudspeaker of Figure 1.
La figure 4 est une vue en coupe transversale de détail d'un aimant et du bobinage en regard, sur laquelle les lignes de champ ont été représentées.  Figure 4 is a cross-sectional detail view of a magnet and facing winding, on which the field lines have been shown.
DESCRIPTION DETAILLEE DE L'INVENTION DETAILED DESCRIPTION OF THE INVENTION
Comme déjà exposé, l'invention concerne donc un haut-parleur qui, comme illustré à la figure 1, se compose essentiellement d'une membrane 2 de forme circulaire et de géométrie sensiblement plane. Cette membrane comporte également un bobinage 3 de forme également circulaire qui est solidaire mécaniquement de la membrane. Autour de ce bobinage 3, se trouve la source de champ magnétique 4, qui comporte un châssis 5 supportant différents éléments aimantés 6. Plus précisément, la membrane 2 est réalisée de façon traditionnelle avec des matériaux tels que, parmi lesquels on peut citer, à titre d'exemples : les matériaux composites (combinant les fibres de verre, d'aramide ou analogue, ou de carbone), les métaux (notamment l'aluminium, le titane et le béryllium), la pulpe de cellulose, les polymères tels que le polypropylène, le polyéthylène téréphtalate (Mylar®), ou l'acrylonitrile butadiène styrène (ABS), ou bien encore les textiles synthétiques. La forme de la membrane peut être plane pour les utilisations dans les basses fréquences, ou bien encore plus complexe (concave, convexe, conique) pour posséder une rigidité supérieure appréciable pour les fonctionnements à plus haute fréquence. La membrane 2 se prolonge périphériquement par une zone 8 accueillant le bobinage 3 qui est enroulé circulairement autour de la périphérie de la membrane 2. Le fil métallique utilisé pour le bobinage est de caractéristiques classiques, et par exemple à base de divers matériaux conducteurs électrique, et notamment le cuivre, l'aluminium, et autres alliages. La section du fil peut être optimisée pour assurer la minimisation de la résistance globale de la bobine. As already stated, the invention therefore relates to a loudspeaker which, as illustrated in FIG. 1, consists essentially of a membrane 2 of circular shape and of substantially flat geometry. This membrane also comprises a winding 3 of circular shape which is mechanically secured to the membrane. Around this winding 3, is the magnetic field source 4, which comprises a frame 5 supporting different magnetized elements 6. More specifically, the membrane 2 is made in a traditional manner with materials such as, among which may be mentioned, at examples: composite materials (combining glass, aramid or similar fibers, or carbon fibers), metals (especially aluminum, titanium and beryllium), cellulose pulp, polymers such as polypropylene, polyethylene terephthalate (Mylar ® ), or acrylonitrile butadiene styrene (ABS), or even synthetic textiles. The shape of the membrane may be flat for use in the low frequencies, or even more complex (concave, convex, conical) to have a superior rigidity appreciable for operations at higher frequency. The membrane 2 is peripherally extended by a zone 8 accommodating the coil 3 which is wound circularly around the periphery of the membrane 2. The wire used for the winding is of conventional characteristics, and for example based on various electrically conductive materials, and in particular copper, aluminum, and other alloys. The wire section can be optimized to minimize the overall resistance of the coil.
Complémentairement, la source magnétique 4 se compose essentiellement d'éléments aimantés 6 se présentant sous la forme de segments répartis angulairement sur la périphérie du bobinage 3. En pratique, ces éléments 6 peuvent être à base de matériaux de très forte aimantation, pour compenser l'absence de pièce polaire, et le fait que ce sont les lignes de fuite de ces éléments aimantés 6 qui traversent le bobinage 3. L'aimantation de ces éléments 6 est donc choisie de telle sorte qu'elle est orientée radialement, et traverse le bobinage 3 perpendiculairement sensiblement selon le plan de la membrane 2. Des matériaux tels que le néodyme ou analogue, présentent une aimantation compatible avec ces applications. Complementarily, the magnetic source 4 consists essentially of magnetized elements 6 in the form of segments angularly distributed on the periphery of the coil 3. In practice, these elements 6 may be based on very strong magnetization materials, to compensate the absence of pole piece, and the fact that it is the creepage of these magnetized elements 6 which pass through the coil 3. The magnetization of these elements 6 is therefore chosen so that it is oriented radially, and passes through the winding 3 perpendicularly substantially along the plane of the membrane 2. Materials such as neodymium or the like have a magnetization compatible with these applications.
Différentes dispositions peuvent être adoptées pour limiter l'entrefer, et optimiser les performances du haut-parleur. Ainsi, comme illustré aux figures 3 et 4, chacun des segments peut présenter une face 10 qui est courbe, plus précisément cylindrique, pour se situer à une distance constante du bobinage. Cette face est donc cylindrique, c'est-à-dire que la distance au bobinage 3 reste la même quelle que soit la position de ce dernier lorsqu'il se déplace avec la membrane. Different arrangements can be adopted to limit the gap, and optimize the performance of the speaker. Thus, as illustrated in Figures 3 and 4, each of the segments may have a face 10 which is curved, more precisely cylindrical, to be at a constant distance from the winding. This face is cylindrical, that is to say that the distance to the coil 3 remains the same regardless of the position of the latter when moving with the membrane.
Comme illustré à la figure 4, les lignes de champ 20 émergent de la face plane 10 de l'élément aimanté. Ces lignes de champ sont orientées vers l'intérieur du haut-parleur, en direction du bobinage 3. De la sorte, au cours de ses mouvements, le bobinage 3 subit positivement l'influence du champ magnétique, y compris dans ses positions extrêmes 3' dont une est illustrée par le bobinage en pointillés. Sur toute la hauteur de la face 10, les lignes de champ 20 présentent une orientation globale en direction du bobinage, avec une répartition suffisamment homogène, ce qui participe à limiter les phénomènes de distorsions. As illustrated in FIG. 4, the field lines 20 emerge from the plane face 10 of the magnetized element. These field lines are oriented towards the inside of the loudspeaker, towards the winding 3. In this way, during its movements, the winding 3 positively undergoes the influence of the magnetic field, including in its extreme positions. one of which is illustrated by the dotted winding. Over the entire height of the face 10, the field lines 20 have an overall orientation in the direction of the winding, with a sufficiently homogeneous distribution, which helps to limit the phenomena of distortions.
Dans une forme particulière de réalisation illustrée à la figure 2, ces éléments aimantés incurvés 6 sont disposés à l'intérieur d'un châssis 4, qui possède des logements appropriés 12. Ces logements 12 sont formés entre des cloisons radiales 15 s'étendant entre deux éléments aimantés 6 adjacents. Des moyens de maintien des éléments aimantés peuvent être aménagés, par exemple sous la forme d'un renflement 16 situé à l'extrémité de la cloison 15, et de forme complémentaire d'un évidement 17 formé sur les petits côtés des éléments aimantés 6. De cette manière, on conserve une quasi-continuité du champ magnétique généré par les éléments aimantés 6 à la frontière entre deux éléments successifs. La face arrière 19 des éléments aimantés peut être plane ou également incurvée selon le type de matériau utilisé. Une paroi 18 en regard de la face arrière 19 des éléments aimantés, peut avantageusement améliorer le maintien de ces éléments 6 sur le châssis 4. Le châssis 4 possède une portion périphérique 20 permettant la fixation du haut-parleur sur son support. In a particular embodiment illustrated in FIG. 2, these curved magnetized elements 6 are disposed inside a chassis 4, which has appropriate housings 12. These housings 12 are formed between radial partitions 15 extending between two adjacent magnet elements 6. Means for holding the magnetized elements may be arranged, for example in the form of a bulge 16 located at the end of the partition 15, and of complementary shape to a recess 17 formed on the short sides of the magnetized elements 6. In this way, a quasi-continuity of the magnetic field generated by the magnetized elements 6 is maintained at the boundary between two successive elements. The rear face 19 of the magnetized elements may be flat or curved depending on the type of material used. A wall 18 facing the rear face 19 of the magnetized elements, can advantageously improve the maintenance of these elements 6 on the frame 4. The frame 4 has a peripheral portion 20 for fixing the loudspeaker on its support.
Selon une autre caractéristique de l'invention, le haut-parleur comporte également des organes de suspension 30,31 illustrés à la figure 3. Chaque organe de suspension 30,31 possède une partie interne 32,33 qui est de forme sensiblement circulaire, et solidarisée à l'une des faces 34,35 de la membrane 2. L'extrémité opposée 36,37 formant le pourtour extérieur de l'organe de suspension 30,31 est lui-même solidarisé au châssis 4 par différents moyens appropriés comme un engagement dans une gorge réalisée à cet effet ou un collage, ou encore tout autre dispositif mécanique adapté. La portion 38,39 de l'organe de suspension 30,31 située entre ses deux extrémités 32,33 ; 36,37 adopte une forme courbe, pour générer un espace 40 englobant la source de champ magnétique et le bobinage. La forme de cette portion centrale 38,39 est choisie pour permettre le débattement maximum de la membrane 2 sans engendrer d'effort mécanique. D'autres formes par exemple rectangulaires peuvent également donner satisfaction. Des matériaux classiquement employés pour réaliser les suspensions peuvent être employés, tels que des textiles enduits ou analogues. According to another characteristic of the invention, the loudspeaker also comprises suspension members 30, 31 illustrated in FIG. 3. Each suspension member 30, 31 has an inner portion 32, 33 which is substantially circular in shape, and secured to one of the faces 34,35 of the membrane 2. The opposite end 36,37 forming the outer periphery of the suspension member 30,31 is itself secured to the frame 4 by various appropriate means as a commitment in a throat made for this purpose or a collage, or any other suitable mechanical device. The portion 38,39 of the suspension member 30,31 located between its two ends 32,33; 36,37 adopts a curved shape, to generate a space 40 encompassing the magnetic field source and the winding. The shape of this central portion 38,39 is chosen to allow the maximum deflection of the membrane 2 without generating mechanical stress. Other forms, for example rectangular, can also give satisfaction. Materials conventionally used to make the suspensions may be employed, such as coated textiles or the like.
Il ressort de ce qui précède que le haut-parleur conforme à l'invention présente de multiples avantages, et en particulier celui de présenter une épaisseur particulièrement réduite par rapport à son diamètre. Il peut donc être avantageusement employé pour des applications où les contraintes d'encombrement sont importantes, et ce tout en conservant de bonnes performances acoustiques, en particulier dans les basses fréquences, grâce à la capacité de déplacer un volume d'air relativement conséquent. It follows from the foregoing that the loudspeaker according to the invention has multiple advantages, and in particular that of having a particularly reduced thickness with respect to its diameter. It can therefore be advantageously used for applications where congestion constraints are important, and while maintaining good acoustic performance, especially in low frequencies, thanks to the ability to move a relatively large volume of air.

Claims

REVENDICATIONS
1. Haut-parleur acoustique (1) comportant : An acoustic loudspeaker (1) comprising:
- une membrane mobile (2) ;  a movable membrane (2);
- une source de champ magnétique constant (4) sensiblement parallèle à la membrane,  a source of constant magnetic field (4) substantially parallel to the membrane,
- un bobinage mécaniquement solidaire de la périphérie de ladite membrane (2) et interagissant avec le champ magnétique pour déplacer la membrane (2), lorsqu'il est parcouru par un courant alternatif,  a winding mechanically secured to the periphery of said membrane (2) and interacting with the magnetic field to move the membrane (2), when it is traversed by an alternating current,
caractérisé en ce que la source de champ magnétique (1) est formée d'un ensemble d'éléments aimantés (6) répartis en périphérie de ladite membrane (2), autour du bobinage (3), chaque élément aimanté présentant une face cylindrique en regard du bobinage, le champ magnétique généré par lesdits éléments aimantés (6) présentant des lignes de champ émergeant de ladite face cylindrique sur toute sa hauteur. characterized in that the magnetic field source (1) is formed of a set of magnetized elements (6) distributed at the periphery of said membrane (2), around the winding (3), each magnetized element having a cylindrical face in view of the winding, the magnetic field generated by said magnetized elements (6) having field lines emerging from said cylindrical face over its entire height.
2. Haut-parleur selon la revendication 1 , caractérisé en ce que la membrane (2) est sensiblement plane. 2. Loudspeaker according to claim 1, characterized in that the membrane (2) is substantially flat.
3. Haut-parleur selon la revendication 1, caractérisé en ce que la membrane est concave ou convexe. 3. Loudspeaker according to claim 1, characterized in that the membrane is concave or convex.
4. Haut-parleur selon la revendication 1 , caractérisé en ce que les éléments aimantés (6) sont disposés en couronne sur la périphérie de la membrane (2). 4. Loudspeaker according to claim 1, characterized in that the magnetized elements (6) are arranged in a ring on the periphery of the membrane (2).
5. Haut-parleur selon la revendication 1, caractérisé en ce que chaque élément aimanté (6) présente une courbure complémentaire de celle du bobinage. 5. Loudspeaker according to claim 1, characterized in that each magnetic element (6) has a curvature complementary to that of the winding.
6. Haut-parleur selon la revendication 1 , caractérisé en ce que les éléments aimantés (6) sont montés à l'intérieur de logements (12) consécutifs réalisés dans un châssis (4). 6. Loudspeaker according to claim 1, characterized in that the magnetized elements (6) are mounted within consecutive housings (12) made in a frame (4).
7. Haut-parleur selon la revendication 1, caractérisé en ce qu'il comporte un organe de suspension (30) relié d'une part au châssis (4) de la source de champ magnétique, et d'autre part à la périphérie de la membrane (2). 7. loudspeaker according to claim 1, characterized in that it comprises a suspension member (30) connected on the one hand to the frame (4) of the magnetic field source, and on the other hand to the periphery of the membrane (2).
8. Haut-parleur selon la revendication 7, caractérisé en ce qu'il comporte un second organe de suspension (31), relié également au châssis (4) et à la périphérie de la membrane (2), mais du côté opposé du bobinage par rapport à l'autre organe de suspension (30), de manière à former un volume (40) fermé autour du bobinage. 8. Loudspeaker according to claim 7, characterized in that it comprises a second suspension member (31), also connected to the frame (4) and the periphery of the membrane (2), but on the opposite side of the winding relative to the other suspension member (30), so as to form a volume (40) closed around the coil.
EP11726910.0A 2010-05-28 2011-05-27 Acoustic loudspeaker Active EP2577992B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1054130A FR2960738B1 (en) 2010-05-28 2010-05-28 ACOUSTIC SPEAKER
PCT/FR2011/051207 WO2011148109A1 (en) 2010-05-28 2011-05-27 Acoustic loudspeaker

Publications (2)

Publication Number Publication Date
EP2577992A1 true EP2577992A1 (en) 2013-04-10
EP2577992B1 EP2577992B1 (en) 2018-12-05

Family

ID=43302105

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11726910.0A Active EP2577992B1 (en) 2010-05-28 2011-05-27 Acoustic loudspeaker

Country Status (4)

Country Link
US (1) US9071898B2 (en)
EP (1) EP2577992B1 (en)
FR (1) FR2960738B1 (en)
WO (1) WO2011148109A1 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012080912A2 (en) * 2010-12-15 2012-06-21 Koninklijke Philips Electronics N.V. An audio driver
CN103329573B (en) 2010-12-23 2018-05-08 普莱赛恩特音响制造有限公司 Low-profile loudspeaker
EP2624595A4 (en) * 2011-05-19 2015-07-01 Tang Band Ind Co Ltd Vibrating plate device of electromagnetic vibrator and manufacture method thereof
CN202949560U (en) * 2012-11-16 2013-05-22 瑞声声学科技(常州)有限公司 Sounder
US9788122B2 (en) * 2012-12-26 2017-10-10 Xin Min HUANG Vibrating panel device for electromagnetic vibrator and manufacture method thereof
JP6589140B2 (en) * 2014-07-04 2019-10-16 パナソニックＩｐマネジメント株式会社 Loudspeaker and mobile device equipped with the same
CA2970740C (en) * 2015-02-05 2023-09-05 Eagle Acoustics Manufacturing, Llc Integrated voice coil and cone assembly and method of making same
ITUB20161213A1 (en) * 2016-03-01 2017-09-01 Faital S P A SPEAKER
US10681467B2 (en) 2016-05-11 2020-06-09 Samsung Electronics Co., Ltd. Slim acoustic transducer and image display apparatus having the same
USD875084S1 (en) * 2017-11-13 2020-02-11 Tymphany Hong Kong Limited Surround for loudspeaker
CN208369831U (en) * 2018-05-04 2019-01-11 惠州超声音响有限公司 A kind of loudspeaker of symmetrical double folding ring
USD966235S1 (en) 2019-08-23 2022-10-11 Tymphany Acoustic Technology Limited Waveguide
CN113873407A (en) * 2021-10-26 2021-12-31 维沃移动通信有限公司 Loudspeaker control method, loudspeaker module and electronic equipment
FR3138258A1 (en) 2022-07-19 2024-01-26 Cédric Carlavan SPEAKER AND FURNITURE EQUIPPED WITH SUCH A SPEAKER

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3567870A (en) * 1968-07-25 1971-03-02 Harold D Linden Wall surface transducer system
BE794025A (en) * 1972-01-21 1973-05-02 Gen Electric MAGNET SET
JPS53129023A (en) * 1977-04-15 1978-11-10 Matsushita Electric Ind Co Ltd Dynamic loudspeaker
JP2558387B2 (en) * 1990-11-16 1996-11-27 株式会社日立製作所 Voice coil motor and magnetic disk device
JPH06233379A (en) * 1993-02-02 1994-08-19 Kenwood Corp Speaker
KR19980032013A (en) * 1995-12-15 1998-07-25 모리시타요오이찌 Vibration generator
DE19616794B4 (en) * 1996-04-26 2005-09-29 Harman Audio Electronic Systems Gmbh speaker
NO975614A (en) * 1997-12-04 1999-04-26 Seas Fabrikker As Permanent magnet assembly
US6611606B2 (en) * 2000-06-27 2003-08-26 Godehard A. Guenther Compact high performance speaker
US6774510B1 (en) * 2000-10-25 2004-08-10 Harman International Industries, Inc. Electromagnetic motor with flux stabilization ring, saturation tips, and radiator
US6862361B2 (en) * 2001-04-05 2005-03-01 Floyd John James Audio speaker
GB0223654D0 (en) * 2002-10-10 2002-11-20 New Transducers Ltd Electromagnetic actuator
US20040213431A1 (en) * 2003-04-25 2004-10-28 Mello William Bernard Electromagnetic audio transducer and or audio speaker
JP4219225B2 (en) * 2003-05-30 2009-02-04 パイオニア株式会社 Speaker device
JP3963173B2 (en) * 2004-01-06 2007-08-22 ソニー株式会社 Speaker
KR20060046263A (en) * 2004-08-04 2006-05-17 도쿄파츠고교 가부시키가이샤 Electromagnetic acoustic transducer with built-in flat type vibration motor
US20060251286A1 (en) * 2005-04-13 2006-11-09 Stiles Enrique M Multi-gap air return motor for electromagnetic transducer
US7706563B2 (en) * 2005-12-19 2010-04-27 Harman International Industries, Incorporated Concentric radial ring motor
US7757376B2 (en) * 2006-09-12 2010-07-20 Tdk Corporation Method for manufacturing of a magnetic circuit
US20080166010A1 (en) * 2007-01-04 2008-07-10 Stiles Enrique M Overlapping surround roll for loudspeaker
FR2921224B1 (en) * 2007-09-18 2009-12-04 Orkidia Audio MAGNETIC STRUCTURE FOR MOTOR WITHOUT IRON OF ELECTRODYNAMIC SPEAKER, MOTORS AND SPEAKERS
US8175319B2 (en) * 2008-06-11 2012-05-08 Sound Sources Technology, Inc. Interchangeable magnet loudspeaker
KR20100121299A (en) * 2009-05-08 2010-11-17 주식회사 비에스이 Multi function micro speaker
ITPD20110191A1 (en) * 2011-06-13 2012-12-14 Maurizio Servadio THIN ELECTROMECHANICAL / ELECTROACOUSTIC TRANSDUCER
US8571252B2 (en) * 2011-12-23 2013-10-29 Ggec America, Inc. Driver assembly for loudspeakers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011148109A1 *

Also Published As

Publication number Publication date
US9071898B2 (en) 2015-06-30
EP2577992B1 (en) 2018-12-05
WO2011148109A1 (en) 2011-12-01
FR2960738A1 (en) 2011-12-02
US20130064413A1 (en) 2013-03-14
FR2960738B1 (en) 2015-09-25

Similar Documents

Publication Publication Date Title
EP2577992B1 (en) Acoustic loudspeaker
EP2524519B1 (en) Coaxial speaker system having a compression chamber with a horn
EP0749265B1 (en) High frequency loudspeaker
EP3371984B1 (en) Multi-glazed window incorporating a noise reduction device
EP1515584B1 (en) Loudspeaker and corresponding loudspeaker enclosure
EP2524521B1 (en) Dome-shaped electrodynamic transducer having a floating suspension
EP1474952B1 (en) Moving-coil electrodynamic motor particularly for a loudspeaker, loudspeaker and corresponding pole piece
EP3391664B1 (en) Acoustic membrane for a loudspeaker and corresponding loudspeaker
EP3469812B1 (en) Electrodynamic broad band transducer for audio headphone and respective audio headphone
FR3108010A1 (en) Loudspeaker comprising a rigid membrane connected to at least two coils
FR3104368A1 (en) LARGE EXCURSION, LOW DISTORTION AND LOW DEPTH LOUDSPEAKER
WO2018229242A1 (en) Loudspeaker
EP2673961A1 (en) Magnetic motor device of an electrodynamic transducer
WO2021111010A1 (en) High excursion, low distortion and low depth speaker
FR3133719A1 (en) Coaxial membrane speaker comprising an insulating material, and two conductive blades fixed on or in the membrane
FR3024630A1 (en) COMPACT SPEAKER INCLUDING A MEMBRANE COMPRISING RADIAL PLATES
WO2011098727A1 (en) Electrodynamic-transducer magnetic motor

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20121123

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20180425

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20180730

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: FOCAL JMLAB

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1074598

Country of ref document: AT

Kind code of ref document: T

Effective date: 20181215

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: FRENCH

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602011054504

Country of ref document: DE

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20181205

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1074598

Country of ref document: AT

Kind code of ref document: T

Effective date: 20181205

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181205

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181205

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181205

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181205

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190305

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190305

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181205

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181205

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190306

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181205

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181205

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181205

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181205

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181205

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190405

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181205

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181205

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181205

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181205

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181205

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190405

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602011054504

Country of ref document: DE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181205

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181205

26N No opposition filed

Effective date: 20190906

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602011054504

Country of ref document: DE

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20190527

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181205

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190531

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190531

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20190531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190527

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181205

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190527

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190527

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191203

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181205

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181205

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20110527

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20181205

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230527

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20240509

Year of fee payment: 14

Ref country code: FR

Payment date: 20240528

Year of fee payment: 14