EP3637788B1 - Electrodynamic loudspeaker comprising an elastic support for supporting a flexible conductor - Google Patents

Electrodynamic loudspeaker comprising an elastic support for supporting a flexible conductor Download PDF

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Publication number
EP3637788B1
EP3637788B1 EP19201696.2A EP19201696A EP3637788B1 EP 3637788 B1 EP3637788 B1 EP 3637788B1 EP 19201696 A EP19201696 A EP 19201696A EP 3637788 B1 EP3637788 B1 EP 3637788B1
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EP
European Patent Office
Prior art keywords
loudspeaker
flexible conductor
fixed frame
longitudinal groove
support
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EP19201696.2A
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German (de)
French (fr)
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EP3637788A1 (en
Inventor
Sylvain Coutarel
Gaël Daveau
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Devialet SA
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Devialet SA
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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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/06—Arranging circuit leads; Relieving strain on circuit leads
    • 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
    • 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
    • H04R7/127—Non-planar diaphragms or cones dome-shaped
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Definitions

  • Such loudspeakers are generally used to produce sound from an electrical signal.
  • the flexible conductor for example a power supply braid, supplies electrical energy to the excitation coil so that the excitation coil moves according to the received electrical signal.
  • This braid is secured at one of its ends to a fixed part of the loudspeaker and at its other end to the moving assembly of the loudspeaker on which the excitation coil is located.
  • Such a loudspeaker does not, however, give complete satisfaction. Indeed, the electrical signal changing very quickly, the flexible conductor is thus subjected to violent mechanical stresses. This can increase the mechanical tension in the flexible conductor, as well as weaken the connection between the flexible conductor and the fixed frame, or even detach the flexible conductor from the fixed frame so as to completely stop the operation of the loudspeaker.
  • An object of the present invention is to provide a loudspeaker whose connection of the flexible conductor is more reliable, even under frequent stresses.
  • the subject of the invention is an electrodynamic loudspeaker of the aforementioned type, in which the loudspeaker also comprises an elastic support fixed to the fixed frame and configured to support the flexible conductor, the elastic support comprising a longitudinal groove in which the flexible conductor is received, each longitudinal groove having a flared inclination towards the convex membrane.
  • front and rear are to be understood with reference to the main direction of propagation of the sounds of a loudspeaker.
  • the forward direction corresponds to the exterior of the loudspeaker, and the rear direction corresponds to the interior of the loudspeaker.
  • the Figure 1 illustrates an electrodynamic loudspeaker 10. It is advantageously substantially of revolution around an axis A-A'.
  • the loudspeaker 10 comprises a fixed frame 12, a motor 14 fixed to the fixed frame 12, and a moving assembly 16 axially movable relative to the fixed frame 12.
  • the fixed frame 12 is also known as the "salad bowl”. It comprises a bottom 20 and a circumferential wall 22 connecting the bottom 20.
  • the circumferential wall 22 has a frustoconical shape of the axis A-A' flared towards the front of the loudspeaker 10.
  • Motor 14 includes a magnet defining at least one air gap 24.
  • the moving assembly 16 comprises a cylindrical reel carrier 26 with axis A-A'. It also includes an excitation coil 28 wound on the outer surface of the coil carrier 26.
  • the mobile assembly 16 also includes a convex membrane 30.
  • the excitation coil 28 is placed in the air gap 24. It defines the axis AA' of the loudspeaker 10. It is capable of oscillating along the axis AA' around a balancing position shown in the Figures .
  • the "axial" direction means the direction along the axis A-A'.
  • the convex membrane 30 is connected to the coil carrier 26. It is capable of being set in motion by the excitation coil 28 so as to be moved together with the excitation coil 28.
  • the convex membrane 30 has a convexity oriented towards the outside of the loudspeaker 10.
  • the convex membrane 30 has the shape of a spherical cap or a dome.
  • the moving assembly 16 also comprises a lattice 32 interposed between the reel holder 26 and the convex membrane 30.
  • the lattice 32 connects the reel holder 26 and the convex membrane 30.
  • the loudspeaker 10 also comprises at least one flexible conductor 36, for example two flexible conductors 36, and an elastic support 38 configured to support the flexible conductor 36.
  • the flexible conductor 36 is for example an electrical supply braid to supply electrical energy to the loudspeaker 10.
  • the flexible conductor 36 includes an end (not shown in the Figures) for connection to the excitation coil and an end 40 for connection to the frame fixed away from the end for connection to the excitation coil.
  • the elastic support 38 has an internal surface 46 oriented towards the axis AA' and an external surface 48 oriented opposite the axis A-A'.
  • the internal surface 46 of the elastic support 38 is fixed to the fixed frame 12 (visible on the Figures 1 , 2 , and 4 ). It has a shape complementary to the fixed frame 12.
  • the elastic support 38 is made of an elastomeric material, for example butadiene-acrylonitrile or a thermoplastic elastomer material.
  • the elastic support 38 has a Shore A hardness of between 60 and 80.
  • the elastic support 38 comprises a base 50 and two branches 52 connected by the base 50 from one of their ends.
  • the elastic support 38 therefore has a flared U shape.
  • the base 50 has a trapezoidal shape flared towards the outside of the loudspeaker 10.
  • Each branch 52 is configured to support a flexible conductor 36. It comprises a longitudinal groove 56 bordered by retaining lips 58.
  • the longitudinal groove 56 extends substantially in the axial direction. It is configured to receive the flexible conductor 36.
  • the flexible conductor 36 is axially mounted free in the longitudinal groove 56. Its axial movement is only hindered by the friction forces with the elastomer constituting the elastic support 38.
  • Each longitudinal groove 56 has a flared inclination towards the convex membrane 30.
  • the inclination of the longitudinal grooves 56 helps to control the trajectory of the flexible conductor 36, both at rest and during operation of the loudspeaker 10.
  • the "path" followed by the flexible conductor 36 is thus better controlled, which prevents it from following paths which would accelerate its degradation.
  • the retaining lips 58 delimit the longitudinal groove 56 at its edge.
  • the retaining lips 58 partially block the longitudinal groove 56 so that the flexible conductor 36 is held in the longitudinal groove 56 and does not come out through the retaining lips 58.
  • the loudspeaker 10 further comprises a base 60 configured to be held by the elastic support 38 from above.
  • the base 60 is glued to the elastic support 38.
  • the base 60 comprises a plate having at each end 62, 64 a connector 66 delimiting an orifice 68 for immobilizing the flexible conductor 36.
  • Each flexible connector 36 is extended by a metal rod 70 which is itself connected to a printed circuit speaker control 10.
  • the security of attachment between the fixed frame 12 and the excitation coil 28 by means of the flexible conductor 36 is improved. Indeed, even if the excitation coil 28 is subjected to very rapidly changing vibrations, the elastic support 38 at least partially absorbs the pulling forces exerted on the flexible conductor 36, and thus reduces the risk of detachment between the flexible conductor 36 and the fixed frame 12.
  • an elastic support 38 to hold the flexible conductors 36 also makes it possible to create a flexible connection between the flexible conductor 36 and the fixed frame 12 of the loudspeaker 10 and thus not to concentrate the stress in the flexible conductor 36 at the attachment to this fixed frame 12.

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

Description

La présente invention concerne un haut-parleur électrodynamique, du type comportant

  • un châssis fixe,
  • un moteur fixé sur le châssis fixe, le moteur définissant au moins un entrefer, et
  • un équipage mobile par rapport au châssis fixe suivant un axe, l'équipage mobile comprenant :
    • > une membrane convexe dont la convexité est orientée vers l'extérieur du haut-parleur, et
    • > une bobine d'excitation de la membrane, la bobine d'excitation étant disposée dans l'entrefer et définissant l'axe du haut-parleur ; et
  • un conducteur souple connecté électriquement à la bobine d'excitation à une extrémité, et relié mécaniquement à une extrémité au châssis fixe à l'écart de son extrémité de connexion à la bobine d'excitation.
The present invention relates to an electrodynamic loudspeaker, of the type comprising
  • a fixed frame,
  • a motor fixed to the fixed frame, the motor defining at least one air gap, and
  • a movable assembly relative to the fixed frame along an axis, the movable assembly comprising:
    • > a convex membrane whose convexity is oriented towards the outside of the loudspeaker, and
    • > a membrane excitation coil, the excitation coil being placed in the air gap and defining the axis of the loudspeaker; and
  • a flexible conductor electrically connected to the field coil at one end, and mechanically connected at one end to the fixed frame spaced from its field coil connection end.

Des haut-parleurs sont présentés dans les documents DE 38 04 542 A1 , US 2005/276437 A1 , US 2001/010728 A1 , US 2016/142803 A1 ou JP S59 111393 U .Speakers are shown in the documents DE 38 04 542 A1 , US 2005/276437 A1 , US 2001/010728 A1 , US 2016/142803 A1 Where JP S59 111393 U .

De tels haut-parleurs sont généralement utilisés pour produire des sons à partir d'un signal électrique. Le conducteur souple, par exemple une tresse d'alimentation électrique, fournit de l'énergie électrique à la bobine d'excitation de sorte que la bobine d'excitation se déplace selon le signal électrique reçu. Cette tresse est solidarisée à une de ses extrémités à une partie fixe du haut-parleur et à son autre extrémité sur l'équipage mobile du haut-parleur sur lequel se trouve la bobine d'excitation.Such loudspeakers are generally used to produce sound from an electrical signal. The flexible conductor, for example a power supply braid, supplies electrical energy to the excitation coil so that the excitation coil moves according to the received electrical signal. This braid is secured at one of its ends to a fixed part of the loudspeaker and at its other end to the moving assembly of the loudspeaker on which the excitation coil is located.

Un tel haut-parleur ne donne cependant pas entière satisfaction. En effet, le signal électrique évoluant très rapidement, le conducteur souple est ainsi soumis à des sollicitations mécaniques violentes. Ceci peut augmenter la tension mécanique dans le conducteur souple, ainsi qu'affaiblir la connexion entre le conducteur souple et le châssis fixe, voire détacher le conducteur souple du châssis fixe de sorte à arrêter totalement le fonctionnement du haut-parleur.Such a loudspeaker does not, however, give complete satisfaction. Indeed, the electrical signal changing very quickly, the flexible conductor is thus subjected to violent mechanical stresses. This can increase the mechanical tension in the flexible conductor, as well as weaken the connection between the flexible conductor and the fixed frame, or even detach the flexible conductor from the fixed frame so as to completely stop the operation of the loudspeaker.

Un but de la présente invention est de proposer un haut-parleur dont la connexion du conducteur souple est plus fiable, même sous sollicitations fréquentes.An object of the present invention is to provide a loudspeaker whose connection of the flexible conductor is more reliable, even under frequent stresses.

A cet effet, l'invention a pour objet un haut-parleur électrodynamique du type précité, dans lequel le haut-parleur comporte en outre un support élastique fixé sur le châssis fixe et configuré pour soutenir le conducteur souple, le support élastique comprenant une rainure longitudinale dans laquelle est reçu le conducteur souple, chaque rainure longitudinale présentant une inclinaison évasée vers la membrane convexe.To this end, the subject of the invention is an electrodynamic loudspeaker of the aforementioned type, in which the loudspeaker also comprises an elastic support fixed to the fixed frame and configured to support the flexible conductor, the elastic support comprising a longitudinal groove in which the flexible conductor is received, each longitudinal groove having a flared inclination towards the convex membrane.

Selon des modes particuliers de réalisation, l'alimentation comporte l'une ou plusieurs des caractéristiques suivantes :

  • le support élastique présente une surface interne orientée vers l'axe du haut-parleur et une surface externe orientée à l'opposé de l'axe du haut-parleur,
    la surface interne du support élastique étant fixée sur le châssis fixe ;
  • la rainure longitudinale est délimitée à sa bordure par des lèvres de maintien du conducteur souple dans la rainure longitudinale, lesquelles lèvres obturent partiellement la rainure longitudinale ;
  • le conducteur souple est monté libre axialement dans la rainure longitudinale ;
  • le support élastique comporte deux branches reliées par une même base, chaque branche étant configurée pour soutenir un conducteur souple ;
  • le support élastique est réalisé en un matériau élastomère, par exemple Butadiène-acrylonitrile ou un matériau en élastomère thermoplastique ; et
  • le support élastique présente une dureté Shore A comprise entre 60 et 80.
According to particular embodiments, the power supply comprises one or more of the following characteristics:
  • the elastic support has an internal surface oriented towards the axis of the loudspeaker and an external surface oriented away from the axis of the loudspeaker,
    the internal surface of the elastic support being fixed to the fixed frame;
  • the longitudinal groove is delimited at its edge by lips holding the flexible conductor in the longitudinal groove, which lips partially block the longitudinal groove;
  • the flexible conductor is mounted free axially in the longitudinal groove;
  • the elastic support comprises two branches connected by the same base, each branch being configured to support a flexible conductor;
  • the elastic support is made of an elastomer material, for example butadiene-acrylonitrile or a thermoplastic elastomer material; and
  • the elastic support has a Shore A hardness of between 60 and 80.

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins sur lesquels :

  • la Figure 1 est une vue en coupe d'un haut-parleur selon l'invention, la coupe étant prise selon un plan passant par l'axe du haut-parleur ;
  • la Figure 2 est une vue en perspective d'un support élastique selon l'invention ;
  • la Figure 3 est une vue en face du support élastique de la Figure 2, la vue étant également prise sans la membrane convexe et le châssis fixe du haut-parleur ;
  • la Figure 4 est une vue similaire à la Figure 2, la vue représentant le châssis fixe et la fixation du support élastique sur le châssis fixe; et
  • la Figure 5 est une vue en perspective détaillée du support élastique de la Figure 2.
The invention will be better understood on reading the following description, given solely by way of example and made with reference to the drawings in which:
  • the Figure 1 is a sectional view of a loudspeaker according to the invention, the section being taken along a plane passing through the axis of the loudspeaker;
  • the Figure 2 is a perspective view of an elastic support according to the invention;
  • the Figure 3 is a front view of the elastic support of the Figure 2 , the view also being taken without the convex membrane and the fixed frame of the loudspeaker;
  • the Figure 4 is a view similar to the Figure 2 , the view representing the fixed frame and the fixing of the elastic support on the fixed frame; and
  • the Figure 5 is a detailed perspective view of the elastic support of the Figure 2 .

Dans la description qui va suivre, les expressions « avant » et « arrière » sont à entendre en référence à la direction de propagation principale des sons d'un haut-parleur. La direction avant correspond à l'extérieur du haut-parleur, et la direction arrière correspond à l'intérieur du haut-parleur.In the following description, the expressions “front” and “rear” are to be understood with reference to the main direction of propagation of the sounds of a loudspeaker. The forward direction corresponds to the exterior of the loudspeaker, and the rear direction corresponds to the interior of the loudspeaker.

La Figure 1 illustre un haut-parleur électrodynamique 10. Il est avantageusement sensiblement de révolution autour d'un axe A-A'.The Figure 1 illustrates an electrodynamic loudspeaker 10. It is advantageously substantially of revolution around an axis A-A'.

Le haut-parleur 10 comporte un châssis fixe 12, un moteur 14 fixé sur le châssis fixe 12, et un équipage mobile 16 déplaçable axialement par rapport au châssis fixe 12.The loudspeaker 10 comprises a fixed frame 12, a motor 14 fixed to the fixed frame 12, and a moving assembly 16 axially movable relative to the fixed frame 12.

Le châssis fixe 12 est également connu sous le nom « saladier ». Il comprend un fond 20 et une paroi circonférentielle 22 reliant le fond 20.The fixed frame 12 is also known as the "salad bowl". It comprises a bottom 20 and a circumferential wall 22 connecting the bottom 20.

La paroi circonférentielle 22 présente une forme tronconique de l'axe A-A' évasée vers l'avant du haut-parleur 10.The circumferential wall 22 has a frustoconical shape of the axis A-A' flared towards the front of the loudspeaker 10.

Le moteur 14 comprend un aimant définissant au moins un entrefer 24.Motor 14 includes a magnet defining at least one air gap 24.

L'équipage mobile 16 comprend un porte-bobine 26 cylindrique d'axe A-A'. Il comprend également une bobine d'excitation 28 bobinée sur la surface extérieure du porte-bobine 26. L'équipage mobile 16 comprend également une membrane convexe 30.The moving assembly 16 comprises a cylindrical reel carrier 26 with axis A-A'. It also includes an excitation coil 28 wound on the outer surface of the coil carrier 26. The mobile assembly 16 also includes a convex membrane 30.

La bobine d'excitation 28 est disposée dans l'entrefer 24. Elle définit l'axe A-A' du haut-parleur 10. Elle est apte à osciller suivant l'axe A-A' autour d'une position d'équilibrage représenté sur les Figures.The excitation coil 28 is placed in the air gap 24. It defines the axis AA' of the loudspeaker 10. It is capable of oscillating along the axis AA' around a balancing position shown in the Figures .

Dans la description qui va suivre, la direction « axiale » signifie la direction suivant l'axe A-A'.In the following description, the "axial" direction means the direction along the axis A-A'.

La membrane convexe 30 est raccordée au porte-bobine 26. Elle est apte à être mise en mouvement par la bobine d'excitation 28 de sorte à être déplacée conjointement avec la bobine d'excitation 28.The convex membrane 30 is connected to the coil carrier 26. It is capable of being set in motion by the excitation coil 28 so as to be moved together with the excitation coil 28.

La membrane convexe 30 présente une convexité orientée vers l'extérieur du haut-parleur 10. La membrane convexe 30 présente une forme de calotte sphérique ou de dôme.The convex membrane 30 has a convexity oriented towards the outside of the loudspeaker 10. The convex membrane 30 has the shape of a spherical cap or a dome.

Avantageusement, l'équipage mobile 16 comprend également un treillis 32 interposé entre le porte-bobine 26 et la membrane convexe 30. Le treillis 32 raccorde le porte-bobine 26 et la membrane convexe 30.Advantageously, the moving assembly 16 also comprises a lattice 32 interposed between the reel holder 26 and the convex membrane 30. The lattice 32 connects the reel holder 26 and the convex membrane 30.

Comme particulièrement visible sur les Figures 2 à 4, le haut-parleur 10 comporte également au moins un conducteur souple 36, par exemple deux conducteurs souples 36, et un support élastique 38 configuré pour soutenir le conducteur souple 36.As particularly visible on the Figures 2 to 4 , the loudspeaker 10 also comprises at least one flexible conductor 36, for example two flexible conductors 36, and an elastic support 38 configured to support the flexible conductor 36.

Le conducteur souple 36 est par exemple une tresse d'alimentation électrique pour fournir de l'énergie électrique au haut-parleur 10.The flexible conductor 36 is for example an electrical supply braid to supply electrical energy to the loudspeaker 10.

Le conducteur souple 36 comprend une extrémité (non-représentée sur les Figures) de connexion à la bobine d'excitation et une extrémité 40 de connexion au châssis fixe à l'écart de l'extrémité de connexion à la bobine d'excitation.The flexible conductor 36 includes an end (not shown in the Figures) for connection to the excitation coil and an end 40 for connection to the frame fixed away from the end for connection to the excitation coil.

Le support élastique 38 présente une surface interne 46 orientée vers l'axe A-A' et une surface externe 48 orientée à l'opposé de l'axe A-A'. La surface interne 46 du support élastique 38 est fixée sur le châssis fixe 12 (visible sur les Figures 1, 2, et 4). Elle présente une forme complémentaire au châssis fixe 12.The elastic support 38 has an internal surface 46 oriented towards the axis AA' and an external surface 48 oriented opposite the axis A-A'. The internal surface 46 of the elastic support 38 is fixed to the fixed frame 12 (visible on the Figures 1 , 2 , and 4 ). It has a shape complementary to the fixed frame 12.

Le support élastique 38 est réalisé en un matériau élastomère, par exemple Butadiène-acrylonitrile ou un matériau en élastomère thermoplastique.The elastic support 38 is made of an elastomeric material, for example butadiene-acrylonitrile or a thermoplastic elastomer material.

Le support élastique 38 présente une dureté Shore A comprise entre 60 et 80.The elastic support 38 has a Shore A hardness of between 60 and 80.

Comme représenté sur la Figure 5, le support élastique 38 comprend une base 50 et deux branches 52 reliées par la base 50 depuis l'une de leurs extrémités. Le support élastique 38 présente donc une forme de U évasé.As shown on the Figure 5 , the elastic support 38 comprises a base 50 and two branches 52 connected by the base 50 from one of their ends. The elastic support 38 therefore has a flared U shape.

La base 50 présente une forme trapézoïde évasée vers l'extérieur du haut-parleur 10.The base 50 has a trapezoidal shape flared towards the outside of the loudspeaker 10.

Chaque branche 52 est configurée pour soutenir un conducteur souple 36. Elle comprend une rainure longitudinale 56 bordée par des lèvres de maintien 58.Each branch 52 is configured to support a flexible conductor 36. It comprises a longitudinal groove 56 bordered by retaining lips 58.

La rainure longitudinale 56 s'étend sensiblement suivant la direction axiale. Elle est configurée pour recevoir le conducteur souple 36. Le conducteur souple 36 est montée libre axialement dans la rainure longitudinale 56. Son mouvement axial est seulement entravé par les forces de friction avec l'élastomère constituant le support élastique 38.The longitudinal groove 56 extends substantially in the axial direction. It is configured to receive the flexible conductor 36. The flexible conductor 36 is axially mounted free in the longitudinal groove 56. Its axial movement is only hindered by the friction forces with the elastomer constituting the elastic support 38.

Chaque rainure longitudinale 56 présente une inclinaison évasée vers la membrane convexe 30. L'inclinaison des rainures longitudinales 56 aide à contrôler la trajectoire du conducteur souple 36, à la fois au repos et lors du fonctionnement du haut-parleur 10. Le « chemin » suivi par le conducteur souple 36 est ainsi mieux contrôlé, ce qui permet d'éviter qu'il suive des chemins qui accéléreraient sa dégradation.Each longitudinal groove 56 has a flared inclination towards the convex membrane 30. The inclination of the longitudinal grooves 56 helps to control the trajectory of the flexible conductor 36, both at rest and during operation of the loudspeaker 10. The "path" followed by the flexible conductor 36 is thus better controlled, which prevents it from following paths which would accelerate its degradation.

Les lèvres de maintien 58 délimitent la rainure longitudinale 56 à sa bordure. Les lèvres de maintien 58 obturent partiellement la rainure longitudinale 56 de sorte que le conducteur souple 36 est maintenu dans la rainure longitudinale 56 et ne sorte pas par les lèvres de maintien 58.The retaining lips 58 delimit the longitudinal groove 56 at its edge. The retaining lips 58 partially block the longitudinal groove 56 so that the flexible conductor 36 is held in the longitudinal groove 56 and does not come out through the retaining lips 58.

Le haut-parleur 10 comporte en outre une embase 60 configurée pour être maintenue par le support élastique 38 par le haut. L'embase 60 est collée sur le support élastique 38.The loudspeaker 10 further comprises a base 60 configured to be held by the elastic support 38 from above. The base 60 is glued to the elastic support 38.

L'embase 60 comprend une platine ayant à chaque extrémité 62, 64 un connecteur 66 délimitant un orifice 68 d'immobilisation du conducteur souple 36. Chaque connecteur souple 36 est prolongé par une tige métallique 70 qui est elle-même connectée à un circuit imprimé de commande du haut-parleur 10.The base 60 comprises a plate having at each end 62, 64 a connector 66 delimiting an orifice 68 for immobilizing the flexible conductor 36. Each flexible connector 36 is extended by a metal rod 70 which is itself connected to a printed circuit speaker control 10.

Grâce à l'invention décrite ci-dessus, la sécurité de fixation entre le châssis fixe 12 et la bobine d'excitation 28 au moyen du conducteur souple 36 est améliorée. En effet, même si la bobine d'excitation 28 est soumise à des vibrations évoluant très rapidement, le support élastique 38 absorbe au moins partiellement des forces de tir exercées sur le conducteur souple 36, et diminue ainsi le risque de détachement entre le conducteur souple 36 et le châssis fixe 12.Thanks to the invention described above, the security of attachment between the fixed frame 12 and the excitation coil 28 by means of the flexible conductor 36 is improved. Indeed, even if the excitation coil 28 is subjected to very rapidly changing vibrations, the elastic support 38 at least partially absorbs the pulling forces exerted on the flexible conductor 36, and thus reduces the risk of detachment between the flexible conductor 36 and the fixed frame 12.

De plus, cette invention permet de dissocier les deux fonctions de l'embase 60 de tiges 70 d'un haut-parleur 10, fonctions qui ont des caractéristiques antagonistes :

  1. 1) la fonction de maintien des conducteurs souples 36, ce qui nécessite une fixation immobile dans la direction perpendiculaire à la direction axiale ;
  2. 2) la fonction de liaison de la tige 70 au châssis fixe 12, ce qui nécessite de la souplesse afin de permettre une insertion du haut-parleur 10 dans une enceinte sans risque de casse de la tige 70.
In addition, this invention makes it possible to separate the two functions of the base 60 of rods 70 of a loudspeaker 10, functions which have antagonistic characteristics:
  1. 1) the holding function of the flexible conductors 36, which requires immobile fixing in the direction perpendicular to the axial direction;
  2. 2) the function of linking the rod 70 to the fixed frame 12, which requires flexibility in order to allow insertion of the loudspeaker 10 in an enclosure without risk of the rod 70 breaking.

En outre, l'utilisation d'un support élastique 38 pour maintenir les conducteurs souples 36 permet également de créer une liaison souple entre le conducteur souple 36 et le châssis fixe 12 du haut-parleur 10 et ainsi de ne pas concentrer la contrainte dans le conducteur souple 36 au niveau de la fixation à ce châssis fixe 12.In addition, the use of an elastic support 38 to hold the flexible conductors 36 also makes it possible to create a flexible connection between the flexible conductor 36 and the fixed frame 12 of the loudspeaker 10 and thus not to concentrate the stress in the flexible conductor 36 at the attachment to this fixed frame 12.

Claims (7)

  1. An electrodynamic loudspeaker (10), comprising:
    - a fixed frame (12),
    - a motor (14) attached to the fixed frame (12), the motor (14) defining at least one air gap (24), and
    - a mobile assembly (16) movable with respect to the fixed frame (12) along an axis (A-A'), the mobile assembly (16) comprising:
    > a convex diaphragm (30) whose convexity is directed outwards from the loudspeaker (10), and
    > an excitation coil (28) of the diaphragm (30), the excitation coil (28) being arranged in the air gap (24) and defining the axis (A-A') of the loudspeaker (10),
    - a flexible conductor (36) electrically connected to the excitation coil (28) at one end, and mechanically connected at one end to the fixed frame (12) away from its connection end to the excitation coil (28),
    the loudspeaker (10) further comprising a resilient support (38) attached to the fixed frame (12) and configured to support the flexible conductor (36),
    the resilient support (38) comprising a longitudinal groove (56) in which the flexible conductor (36) is received,
    characterised in that each longitudinal groove (56) has a flared slope towards the convex diaphragm (30).
  2. The electromagnetic loudspeaker (10) according to claim 1, wherein the elastic support (38) has an inner surface (46) facing the axis (A-A') of the loudspeaker (10) and an outer surface (48) facing away from the axis (A-A') of the loudspeaker (10),
    the inner surface (46) of the elastic support (38) being secured to the fixed frame (12).
  3. The electromagnetic loudspeaker (10) according to claim 1, wherein the longitudinal groove (56) is delimited at its edge by retaining lips (58) of the flexible conductor (36) in the longitudinal groove (56), which lips (58) partially close the longitudinal groove (56).
  4. The electromagnetic loudspeaker (10) according to claim 1 or 3, wherein the flexible conductor (36) is mounted axially free in the longitudinal groove (56).
  5. The electromagnetic loudspeaker (10) according to any of the preceding claims, wherein the resilient support (38) comprises two legs (52) connected by a common base (50), each leg (52) being configured to support a flexible conductor (36).
  6. The electromagnetic loudspeaker (10) according to any one of the preceding claims, wherein the resilient support (38) is made of an elastomeric material, e.g. Butadiene-acrylonitrile or a thermoplastic elastomeric material.
  7. The electromagnetic loudspeaker (10) according to any one of the preceding claims, wherein the resilient support (38) has a Shore A hardness of between 60 and 80.
EP19201696.2A 2018-10-08 2019-10-07 Electrodynamic loudspeaker comprising an elastic support for supporting a flexible conductor Active EP3637788B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1859323A FR3087070B1 (en) 2018-10-08 2018-10-08 ELECTRODYNAMIC LOUDSPEAKER FEATURING AN ELASTIC BRACKET TO SUPPORT A SOFT DRIVER

Publications (2)

Publication Number Publication Date
EP3637788A1 EP3637788A1 (en) 2020-04-15
EP3637788B1 true EP3637788B1 (en) 2022-01-19

Family

ID=66218134

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19201696.2A Active EP3637788B1 (en) 2018-10-08 2019-10-07 Electrodynamic loudspeaker comprising an elastic support for supporting a flexible conductor

Country Status (3)

Country Link
EP (1) EP3637788B1 (en)
DK (1) DK3637788T3 (en)
FR (1) FR3087070B1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59111393U (en) * 1983-01-14 1984-07-27 株式会社ケンウッド Lead wire holding structure in speakers, etc.
DE3804542C2 (en) * 1988-02-13 1995-04-06 Nokia Deutschland Gmbh Loudspeaker connection with strain relief
CN1205840C (en) * 2000-01-27 2005-06-08 皇家菲利浦电子有限公司 Electroacoustic transducer having a moving coil and having elastic holding elements for the connecting leads of the moving coil
JP2005354449A (en) * 2004-06-11 2005-12-22 Pioneer Electronic Corp Speaker and its manufacturing method
JP6368918B2 (en) * 2013-03-27 2018-08-08 パナソニックＩｐマネジメント株式会社 Speaker and manufacturing method thereof

Also Published As

Publication number Publication date
EP3637788A1 (en) 2020-04-15
FR3087070A1 (en) 2020-04-10
FR3087070B1 (en) 2022-01-21
DK3637788T3 (en) 2022-04-04

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