EP3637795A1 - Electrodynamic loudspeaker comprising a lattice - Google Patents

Electrodynamic loudspeaker comprising a lattice Download PDF

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Publication number
EP3637795A1
EP3637795A1 EP19201924.8A EP19201924A EP3637795A1 EP 3637795 A1 EP3637795 A1 EP 3637795A1 EP 19201924 A EP19201924 A EP 19201924A EP 3637795 A1 EP3637795 A1 EP 3637795A1
Authority
EP
European Patent Office
Prior art keywords
trellis
loudspeaker
convex membrane
fixed
conductive strip
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
EP19201924.8A
Other languages
German (de)
French (fr)
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EP3637795B1 (en
Inventor
Gaël Daveau
Sylvain Coutarel
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Devialet SA
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Devialet SA
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Publication date
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Publication of EP3637795A1 publication Critical patent/EP3637795A1/en
Application granted granted Critical
Publication of EP3637795B1 publication Critical patent/EP3637795B1/en
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • 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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/283—Enclosures comprising vibrating or resonating arrangements using a passive diaphragm
    • H04R1/2834—Enclosures comprising vibrating or resonating arrangements using a passive diaphragm for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/24—Tensioning by means acting directly on free portions of diaphragm or cone
    • 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
    • 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
    • H04R2207/00—Details of diaphragms or cones for electromechanical transducers or their suspension covered by H04R7/00 but not provided for in H04R7/00 or in H04R2307/00
    • H04R2207/021—Diaphragm extensions, not necessarily integrally formed, e.g. skirts, rims, flanges

Definitions

  • Such speakers are generally used to produce sounds from an electrical signal. It is known that increasing the area of the convex membrane increases the volume of the sounds produced by the loudspeaker.
  • Loudspeakers are known whose membrane is rigid and has a dome shape with its convexity facing outwards.
  • the dome is fixed to the end of a coil-carrying tube along a connecting ring formed in the middle position of the dome.
  • An object of the present invention is to provide a loudspeaker capable of producing good quality sounds at high frequencies, even if the membrane has a large area.
  • the subject of the invention is an electrodynamic loudspeaker of the aforementioned type, in which the trellis comprises an inner ring and an outer coaxial ring connected together by radial pillars and to a fixing ring at one end of the moving part, the convex membrane being fixed in abutment on the internal and external rings.
  • front and rear should be understood with reference to the main direction of propagation of the sounds of a loudspeaker.
  • the front direction corresponds to the outside of the speaker, and the rear direction corresponds to the inside of the speaker.
  • the Figure 1 illustrates an electrodynamic loudspeaker 10. It is advantageously substantially of revolution around an axis AA ′.
  • the loudspeaker 10 comprises a fixed chassis 12, a motor comprising a fixed base 14 connected to the fixed chassis 12 and a mobile assembly 16 movable axially relative to the fixed base 14.
  • the loudspeaker 10 also comprises a convex membrane 18 and a trellis 20 connecting the convex membrane 18 and the moving element 16.
  • the fixed frame 12 is also known by the name “salad bowl”. It includes a bottom 28 and a circumferential wall 30 connecting the bottom 28.
  • the circumferential wall 30 has a frustoconical shape of the axis AA ′ flared towards the front of the loudspeaker 10.
  • the fixed base 14 comprises a yoke 34 on which a magnet 35 is placed.
  • the yoke 34 defines at least one air gap 36.
  • the moving element 16 comprises a cylindrical coil holder 41 of axis AA ′ on the external surface of which an excitation coil 42 is wound.
  • the excitation coil 42 is placed in the air gap 36.
  • the excitation coil 42 is able to oscillate along the axis A-A 'around a balancing position shown in the Figures.
  • the "axial” direction means the direction along the axis A-A '
  • the "radial” direction means a direction perpendicular to the axis A-A'.
  • the convex membrane 18 has a convexity oriented towards the outside of the loudspeaker 10.
  • the convex membrane 18 has the shape of a spherical cap or dome.
  • the convex membrane 18 has a peripheral edge 44.
  • the peripheral edge 44 has a substantially circular shape centered on the axis AA ′.
  • the trellis 20 is generally of axis AA '(the axis AA' visible on the Figures 1 and 3 ). It comprises an internal ring 46, an external ring 48, and a plurality of radial pillars 50 connecting the internal ring 46 and the external ring 48.
  • the trellis 20 also comprises a ring 52 for fixing to one end 53 of the spool holder 41 as well as an axial skirt 54 for connection to an elastic guide ring 56 whose outer periphery is connected to the fixed frame 12.
  • the mesh 20 is formed by injecting a plastic material into a mold and is therefore in one piece.
  • the elastic guide ring 56 is commonly known by the English name "spider”. It is interposed between the circumferential wall 30 and a free end 57 of the axial skirt 54. It is intended to support the axial skirt 54, and by means of this, a set of trellis 20 and the convex membrane 18, on the fixed frame 12.
  • the elastic guide ring 56 extends around the axis AA ′. It extends in a radial plane.
  • the internal and external rings 46, 48 are coaxial.
  • the outer ring 48 is of larger diameter than the inner ring 46.
  • the convex membrane 18 is mechanically fixed in abutment on the internal and external rings 46, 48 by gluing.
  • the external ring 48 is directly fixed to the peripheral edge 44 of the convex membrane 18.
  • the radial pillars 50 are angularly distributed around the axis AA ′. They each extend between the outer ring 48 and the fixing ring 52.
  • the fixing ring 52 has a diameter smaller than that of the internal ring 46.
  • the fixing ring 52 comprises a receiving groove 58 in which is received the end 53 of the reel holder 41 of the moving element 16.
  • the receiving groove 58 is advantageously glued to the reel holder 41.
  • the axial skirt 54 is integral with the radial pillars 50. It projects from the radial pillars 50 to the free end 57 and extends axially opposite the internal and external rings 46, 48. It extends substantially parallel to the axis AA ′, and surrounds it.
  • the axial skirt 54 has a diameter between those of the internal and external rings 46, 48.
  • the trellis 20 has first and second dials 62, 63 separated by a plane BB 'passing through the axis A-A'. As visible on the Figure 3 , the density of radial pillars 50 is greater in the second dial 63 of the trellis 20 than in the first dial 62 of the trellis 20.
  • the first dial 62 of the lattice 20 also comprises at least two conductive blades 64.
  • the conductive blade 64 connects the excitation coil 42 of the movable assembly 16 to a braid 65 of electrical supply.
  • Each conductive strip 64 is received in a radial pillar 50. It crosses this radial pillar 50 and extends into the axial skirt 54.
  • At least one radial pillar 50 comprises an axial slot 66 extending substantially parallel to the axis AA ′.
  • the axial slot 66 includes a first face 68 oriented opposite the axis of the speaker AA 'and a second face 70 oriented towards the axis AA'.
  • the second face 70 of the axial slot 66 is essentially parallel to the first face 68.
  • the axial skirt 54 comprises an axial slot 74 extending substantially parallel to the axis AA ′.
  • the axial slot 74 comprises a first surface 76 oriented opposite the axis A-A 'and a second surface 78 oriented towards the axis A-A'.
  • the second surface 78 of the axial slot 74 is essentially parallel to the first surface 76.
  • the conductive strip 64 has a thin shape. It is advantageously made of copper.
  • the holding section 88 has two holding sections 88, 90 extending axially connected to one another by a perpendicular radial section 92.
  • the holding section 88 is extended by a radial connection section 94 itself connected by welding to a connection tab 95 carried by the coil holder 41 and extending the excitation coil 42.
  • the holding section 90 is extended by an end lug 96 onto which the braid 65 is welded.
  • the holding sections 88, 90 are received in the axial slot 66 and the axial slot 74 respectively.
  • the holding sections 88, 90 each have on its internal face at least a first projection 98, respectively at least a second projection 102, bearing on the first face 68 of the axial slot 66, respectively the first surface 76 of the axial slot 74.
  • the external face of the retaining section 88, respectively of the retaining section 90, is supported on the second face 70 of the axial slot 66, respectively on the second surface 78 of the axial slot 74.
  • the holding sections 88, 90 each also includes at least one locking claw 104 configured to penetrate the trellis 20 so as to prevent the displacement of the conductive strip 64 to the convex membrane 18 in the axial direction.
  • the holding section 88 further comprises a shoulder 106 configured to cooperate with the mesh 20 so as to prevent the displacement of the conductive strip 64 away from the convex membrane 18 in the axial direction.
  • the locking claws 104 and the shoulder 106 therefore jointly block the position of the conductive strip 64 in the axial direction.
  • the retaining section 90 further comprises a shoulder 108 kept at a distance from the trellis 20, the shoulder 108 and the trellis 20 having between them a non-zero clearance substantially equal to 0.8 mm. This game notably prevents the shoulder 108 comes into abutment against the trellis 20 during a possible creep of the trellis 20 which could cause a consequent descent of the conductive strip 64.
  • the end lug 96 is configured to receive the braid 65 for electrical supply. It advantageously has a U shape converging towards the bottom of U to maintain the braid 65 for electrical supply.
  • the trellis 20 comprises at the base of two radial pillars 50 two tabs 110 (one of which is visible on the Figure 6 ) temporarily blocking the braids 65 during assembly of the loudspeaker 10.
  • the tabs 110 define with the radial pillars 50 grooves in which the braids 65 are retained during the handling of the moving element 16 equipped with the trellis 20 and the convex membrane 18 before their mounting in the fixed frame 12 of the loudspeaker 10.
  • the radial pillars 50 are devoid of an axial slot, and the axial skirt 54 is devoid of an axial groove.
  • the second dial 63 of the lattice 20 is also devoid of conductive strip 64.
  • the asymmetrical configuration of the first and second dials 62, 63 of the trellis 20 allows the radial pillars 50 in the first dial 62 to compensate for the weight of the conductive blades 64 arranged in the second dial 63. This allows the first and second dials 62, 63 to have a substantially identical weight so as to obtain a loudspeaker 10 with a good balancing property.
  • the loudspeaker 10 also has an elastic suspension joint 112 for the convex membrane 18.
  • the elastic suspension seal 112 connects an upper end of the circumferential wall 30 to the axial skirt 54 in the vicinity of the outer ring 48.
  • the elastic suspension seal 112 is disposed axially less distant from the convex membrane 18 than the elastic ring guide 56.
  • the elastic suspension joint 112 extends around the axis AA ′. It extends in a radial plane.
  • the elastic suspension joint 112 has, in section along a plane passing through the axis AA ′, a shape in ⁇ , the convexity of ⁇ being turned axially towards the rear of the speaker 10.
  • the elastic suspension joint 112 is airtight.
  • a rigidified fixing of the convex membrane 18 makes it possible to reduce the unwanted resonance modes and thus improves the performance of the speaker 10 when the sounds produced have high frequencies.
  • the conductive strip 64 makes it possible to better maintain the position of the braid 65 of electrical supply relative to the movable assembly 16, which eliminates the need to supply excessively long braids 65 to supply electrical energy to the speaker 10.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

Le haut-parleur (10) électrodynamique comportant :- un châssis fixe (12),- un moteur comportant une base fixe (14) reliée au châssis fixe (12) et un équipage mobile (16) axialement par rapport à la base fixe (14) suivant un axe (A-A'),- une membrane convexe (18) dont la convexité est orientée vers l'extérieur du haut-parleur (10), et- un treillis (20) reliant la membrane convexe (18) et l'équipage mobile (16).Le treillis (20) comprend un anneau interne (46) et un anneau externe (48) coaxiaux reliés ensemble par des piliers radiaux (50) et à une couronne (52) de fixation à une extrémité (53) de l'équipage mobile (16), la membrane convexe (18) étant fixée en appui sur les anneaux interne et externe (46, 48).The electrodynamic loudspeaker (10) comprising: - a fixed chassis (12), - a motor comprising a fixed base (14) connected to the fixed chassis (12) and a movable assembly (16) axially relative to the fixed base ( 14) along an axis (A-A '), - a convex membrane (18) whose convexity is oriented towards the outside of the loudspeaker (10), and - a trellis (20) connecting the convex membrane (18) and the moving element (16). The trellis (20) comprises an inner ring (46) and an outer ring (48) coaxial connected together by radial pillars (50) and to a crown (52) for fixing at one end (53) of the mobile assembly (16), the convex membrane (18) being fixed in abutment on the internal and external rings (46, 48).

Description

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

  • un châssis fixe,
  • un moteur comportant une base fixe reliée au châssis fixe et un équipage mobile axialement par rapport à la base fixe suivant un axe,
  • une membrane convexe dont la convexité est orientée vers l'extérieur du haut-parleur, et
  • un treillis reliant la membrane convexe et l'équipage mobile.
The present invention relates to an electrodynamic loudspeaker, of the type comprising
  • a fixed frame,
  • an engine comprising a fixed base connected to the fixed chassis and an assembly movable axially with respect to the fixed base along an axis,
  • a convex membrane whose convexity is oriented towards the outside of the loudspeaker, and
  • a trellis connecting the convex membrane and the moving part.

De tels haut-parleurs sont généralement utilisés pour produire des sons à partir d'un signal électrique. Il est connu qu'augmenter l'aire de la membrane convexe augmente le volume des sons produits par le haut-parleur.Such speakers are generally used to produce sounds from an electrical signal. It is known that increasing the area of the convex membrane increases the volume of the sounds produced by the loudspeaker.

On connaît des haut-parleurs dont la membrane est rigide et présente une forme de dôme avec sa convexité tournée vers l'extérieur. Le dôme est fixé à l'extrémité d'un tube porte-bobine suivant un anneau de liaison ménagé en position médiane du dôme.Loudspeakers are known whose membrane is rigid and has a dome shape with its convexity facing outwards. The dome is fixed to the end of a coil-carrying tube along a connecting ring formed in the middle position of the dome.

Un tel haut-parleur ne donne cependant pas entière satisfaction. Lorsque des sons produits par le haut-parleur présentent une fréquence élevée, par exemple d'environ 500 Hz, en particulier proche de 550 Hz, des modes de résonance peuvent être produits par la membrane. Ces modes de résonances dégradent la qualité de sons produits par le haut-parleur.However, such a speaker is not entirely satisfactory. When sounds produced by the loudspeaker have a high frequency, for example around 500 Hz, in particular close to 550 Hz, resonance modes can be produced by the membrane. These resonance modes degrade the quality of sounds produced by the speaker.

Un but de la présente invention est de proposer un haut-parleur apte à produire des sons de bonne qualité à hautes fréquences, même si la membrane présente une grande aire.An object of the present invention is to provide a loudspeaker capable of producing good quality sounds at high frequencies, even if the membrane has a large area.

A cet effet, l'invention a pour objet un haut-parleur électrodynamique du type précité, dans lequel le treillis comprend un anneau interne et un anneau externe coaxiaux reliés ensemble par des piliers radiaux et à une couronne de fixation à une extrémité de l'équipage mobile, la membrane convexe étant fixée en appui sur les anneaux interne et externe.To this end, the subject of the invention is an electrodynamic loudspeaker of the aforementioned type, in which the trellis comprises an inner ring and an outer coaxial ring connected together by radial pillars and to a fixing ring at one end of the moving part, the convex membrane being fixed in abutment on the internal and external rings.

Selon des modes particuliers de réalisation, le haut-parleur comprend l'une ou plusieurs des caractéristiques suivantes, prises isolément ou selon toutes les combinaisons techniquement possibles :

  • la membrane convexe présente un bord périphérique, l'anneau externe étant directement fixé au bord périphérique de la membrane convexe ;
  • le treillis comprend une jupe axiale solidaire des piliers radiaux et s'étendant axialement à l'opposé des anneaux interne et externe ;
  • la couronne de fixation comprend une gorge de réception de l'extrémité de l'équipage mobile, l'équipage mobile étant avantageusement collé à la gorge de réception ;
  • le treillis présente un premier et un deuxième cadrans, s'étendant chacun sur 180° autour de l'axe, le premier cadran du treillis comportant en outre au moins une lame conductrice raccordant l'équipage mobile à une tresse d'alimentation électrique, le deuxième cadran du treillis étant dépourvu de telle lame conductrice ;
  • la lame conductrice comprend un ergot d'extrémité configuré pour recevoir la tresse d'alimentation électrique ;
  • la lame conductrice est reçue entre deux faces essentiellement parallèles du treillis et en ce que la lame conductrice comporte sur une face interne une saillie en appui contre l'une des faces du treillis, la lame conductrice étant en appui sur l'autre face de treillis suivant son autre face ;
  • la lame conductrice comprend au moins une griffe de blocage configurée pour pénétrer dans le treillis de sorte à empêcher le déplacement de la lame conductrice à l'écart de la membrane convexe suivant la direction de l'axe du haut-parleur ;
  • les piliers radiaux sont répartis angulairement et en ce que la densité de piliers radiaux est plus importante dans le deuxième cadran du treillis que dans le premier cadran du treillis ; et
  • le haut-parleur électromagnétique comporte un anneau élastique de guidage interposé entre le châssis fixe et une extrémité libre de la jupe axiale.
According to particular embodiments, the loudspeaker comprises one or more of the following characteristics, taken in isolation or in any technically possible combination:
  • the convex membrane has a peripheral edge, the outer ring being directly fixed to the peripheral edge of the convex membrane;
  • the trellis comprises an axial skirt integral with the radial pillars and extending axially opposite the internal and external rings;
  • the fixing ring comprises a groove for receiving the end of the mobile assembly, the mobile assembly advantageously being glued to the reception groove;
  • the trellis has first and second dials, each extending 180 ° around the axis, the first dial of the trellis further comprising at least one conductive strip connecting the movable assembly to a braid of electrical supply, the second trellis dial being devoid of such conductive strip;
  • the conductive strip comprises an end lug configured to receive the electrical supply braid;
  • the conductive strip is received between two essentially parallel faces of the lattice and in that the conductive strip has on one internal face a projection bearing against one of the faces of the lattice, the conductive strip being supported on the other face of the lattice according to its other face;
  • the conductive strip comprises at least one blocking claw configured to penetrate the lattice so as to prevent the displacement of the conductive strip away from the convex membrane in the direction of the axis of the loudspeaker;
  • the radial pillars are distributed angularly and in that the density of radial pillars is greater in the second dial of the trellis than in the first dial of the trellis; and
  • the electromagnetic loudspeaker comprises an elastic guide ring interposed between the fixed frame and a free end of the axial skirt.

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 annexés, 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 coupe du haut-parleur représenté sur la Figure 1 sans la membrane convexe et le châssis fixe ;
  • la Figure 3 est une vue de dessus d'un treillis du haut-parleur selon l'invention ;
  • la Figure 4 est une vue en perspective d'une lame conductrice selon l'invention ;
  • la Figure 5 est une vue de face de la lame conductrice de la Figure 4 ; et
  • la Figure 6 est une vue en perspective du haut-parleur représenté sur la Figure 1 sans la membrane convexe et le châssis fixe.
The invention will be better understood on reading the description which follows, given solely by way of example and made with reference to the appended drawings, in which:
  • the Figure 1 is a sectional view of a speaker according to the invention, the section being taken along a plane passing through the axis of the speaker;
  • the Figure 2 is a sectional view of the loudspeaker shown in the Figure 1 without the convex membrane and the fixed frame;
  • the Figure 3 is a top view of a speaker mesh according to the invention;
  • the Figure 4 is a perspective view of a conductive strip according to the invention;
  • the Figure 5 is a front view of the conductive strip of the Figure 4 ; and
  • the Figure 6 is a perspective view of the loudspeaker shown in the Figure 1 without the convex membrane and the fixed frame.

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" should be understood with reference to the main direction of propagation of the sounds of a loudspeaker. The front direction corresponds to the outside of the speaker, and the rear direction corresponds to the inside of the speaker.

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 AA ′.

Le haut-parleur 10 comporte un châssis fixe 12, un moteur comportant une base fixe 14 reliée au châssis fixe 12 et un équipage mobile 16 déplaçable axialement par rapport à la base fixe 14.The loudspeaker 10 comprises a fixed chassis 12, a motor comprising a fixed base 14 connected to the fixed chassis 12 and a mobile assembly 16 movable axially relative to the fixed base 14.

Le haut-parleur 10 comporte également une membrane convexe 18 et un treillis 20 reliant la membrane convexe 18 et l'équipage mobile 16.The loudspeaker 10 also comprises a convex membrane 18 and a trellis 20 connecting the convex membrane 18 and the moving element 16.

Le châssis fixe 12 est également connu sous le nom « saladier ». Il comprend un fond 28 et une paroi circonférentielle 30 reliant le fond 28.The fixed frame 12 is also known by the name "salad bowl". It includes a bottom 28 and a circumferential wall 30 connecting the bottom 28.

La paroi circonférentielle 30 présente une forme tronconique de l'axe A-A' évasée vers l'avant du haut-parleur 10.The circumferential wall 30 has a frustoconical shape of the axis AA ′ flared towards the front of the loudspeaker 10.

Dans le mode de réalisation de l'invention représenté sur les Figures, la base fixe 14 comprend une culasse 34 sur laquelle est disposé un aimant 35. La culasse 34 définit au moins un entrefer 36.In the embodiment of the invention shown in the Figures, the fixed base 14 comprises a yoke 34 on which a magnet 35 is placed. The yoke 34 defines at least one air gap 36.

L'équipage mobile 16 comprend un porte-bobine cylindrique 41 d'axe A-A' sur la surface extérieure de laquelle est bobinée une bobine d'excitation 42.The moving element 16 comprises a cylindrical coil holder 41 of axis AA ′ on the external surface of which an excitation coil 42 is wound.

La bobine d'excitation 42 est disposée dans l'entrefer 36.The excitation coil 42 is placed in the air gap 36.

La bobine d'excitation 42 est apte à osciller suivant l'axe A-A' autour d'une position d'équilibrage représenté sur les Figures.The excitation coil 42 is able to oscillate along the axis A-A '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', et la direction « radiale » signifie une direction perpendiculaire à l'axe A-A'.In the description which follows, the "axial" direction means the direction along the axis A-A ', and the "radial" direction means a direction perpendicular to the axis A-A'.

La membrane convexe 18 présente une convexité orientée vers l'extérieur du haut-parleur 10. La membrane convexe 18 présente une forme de calotte sphérique ou de dôme.The convex membrane 18 has a convexity oriented towards the outside of the loudspeaker 10. The convex membrane 18 has the shape of a spherical cap or dome.

La membrane convexe 18 présente un bord périphérique 44. Le bord périphérique 44 présente une forme sensiblement circulaire centrée sur l'axe A-A'.The convex membrane 18 has a peripheral edge 44. The peripheral edge 44 has a substantially circular shape centered on the axis AA ′.

En référence aux Figures 1 à 2, le treillis 20 est généralement d'axe A-A' (l'axe A-A' visible sur les Figures 1 et 3). Il comprend un anneau interne 46, un anneau externe 48, et une pluralité de piliers radiaux 50 reliant l'anneau interne 46 et l'anneau externe 48.With reference to Figures 1 to 2 , the trellis 20 is generally of axis AA '(the axis AA' visible on the Figures 1 and 3 ). It comprises an internal ring 46, an external ring 48, and a plurality of radial pillars 50 connecting the internal ring 46 and the external ring 48.

Le treillis 20 comprend également une couronne 52 de fixation à une extrémité 53 du porte-bobine 41 ainsi qu'une jupe axiale 54 de liaison à un anneau élastique de guidage 56 dont la périphérie extérieure est reliée au châssis fixe 12.The trellis 20 also comprises a ring 52 for fixing to one end 53 of the spool holder 41 as well as an axial skirt 54 for connection to an elastic guide ring 56 whose outer periphery is connected to the fixed frame 12.

Le treillis 20 est formé par injection d'une matière plastique dans un moule et est donc monobloc.The mesh 20 is formed by injecting a plastic material into a mold and is therefore in one piece.

L'anneau élastique de guidage 56 est couramment connu sous le nom anglais « spider ». Il est interposé entre la paroi circonférentielle 30 et une extrémité libre 57 de la jupe axiale 54. Il est destiné à supporter la jupe axiale 54, et au moyen de celle-ci, un ensemble de treillis 20 et la membrane convexe 18, sur le châssis fixe 12.The elastic guide ring 56 is commonly known by the English name "spider". It is interposed between the circumferential wall 30 and a free end 57 of the axial skirt 54. It is intended to support the axial skirt 54, and by means of this, a set of trellis 20 and the convex membrane 18, on the fixed frame 12.

L'anneau élastique de guidage 56 s'étend autour de l'axe A-A'. Il s'étend dans un plan radial.The elastic guide ring 56 extends around the axis AA ′. It extends in a radial plane.

Les anneaux interne et externe 46, 48 sont coaxiaux. L'anneau externe 48 est de plus grand diamètre que l'anneau interne 46.The internal and external rings 46, 48 are coaxial. The outer ring 48 is of larger diameter than the inner ring 46.

La membrane convexe 18 est fixée mécaniquement en appui sur les anneaux interne et externe 46, 48 par collage.The convex membrane 18 is mechanically fixed in abutment on the internal and external rings 46, 48 by gluing.

L'anneau externe 48 est directement fixé au bord périphérique 44 de la membrane convexe 18.The external ring 48 is directly fixed to the peripheral edge 44 of the convex membrane 18.

Les piliers radiaux 50 sont répartis angulairement autour de l'axe A-A'. Ils s'étendent chacun entre l'anneau externe 48 et la couronne 52 de fixation.The radial pillars 50 are angularly distributed around the axis AA ′. They each extend between the outer ring 48 and the fixing ring 52.

La couronne 52 de fixation a un diamètre inférieur à celui de l'anneau interne 46.The fixing ring 52 has a diameter smaller than that of the internal ring 46.

La couronne 52 de fixation comprend une gorge de réception 58 dans laquelle est reçue l'extrémité 53 du porte-bobine 41 de l'équipage mobile 16. La gorge de réception 58 est avantageusement collée au porte-bobine 41.The fixing ring 52 comprises a receiving groove 58 in which is received the end 53 of the reel holder 41 of the moving element 16. The receiving groove 58 is advantageously glued to the reel holder 41.

La jupe axiale 54 est solidaire des piliers radiaux 50. Elle fait saillie à partir des piliers radiaux 50 jusqu'à l'extrémité libre 57 et s'étend axialement à l'opposé des anneaux interne et externe 46, 48. Elle s'étend sensiblement parallèlement à l'axe A-A', et entoure celui-ci.The axial skirt 54 is integral with the radial pillars 50. It projects from the radial pillars 50 to the free end 57 and extends axially opposite the internal and external rings 46, 48. It extends substantially parallel to the axis AA ′, and surrounds it.

La jupe axiale 54 a un diamètre compris entre ceux des anneaux interne et externe 46, 48.The axial skirt 54 has a diameter between those of the internal and external rings 46, 48.

Le treillis 20 présente un premier et un deuxième cadrans 62, 63 séparés par un plan B-B' passant par l'axe A-A'. Comme visible sur la Figure 3, la densité de piliers radiaux 50 est plus importante dans le deuxième cadran 63 du treillis 20 que dans le premier cadran 62 du treillis 20.The trellis 20 has first and second dials 62, 63 separated by a plane BB 'passing through the axis A-A'. As visible on the Figure 3 , the density of radial pillars 50 is greater in the second dial 63 of the trellis 20 than in the first dial 62 of the trellis 20.

Le premier cadran 62 du treillis 20 comporte également au moins deux lames conductrices 64. La lame conductrice 64 raccorde la bobine d'excitation 42 de l'équipage mobile 16 à une tresse 65 d'alimentation électrique. Chaque lame conductrice 64 est reçue dans un pilier radial 50. Elle traverse ce pilier radial 50 et se prolonge dans la jupe axiale 54.The first dial 62 of the lattice 20 also comprises at least two conductive blades 64. The conductive blade 64 connects the excitation coil 42 of the movable assembly 16 to a braid 65 of electrical supply. Each conductive strip 64 is received in a radial pillar 50. It crosses this radial pillar 50 and extends into the axial skirt 54.

A cet effet, et comme représenté sur la Figure 2, dans le première cadran 62 du treillis 20, au moins un pilier radial 50 comprend une fente axiale 66 s'étendant sensiblement parallèlement à l'axe A-A'. La fente axiale 66 comprend une première face 68 orientée à l'opposé de l'axe du haut-parleur A-A' et une deuxième face 70 orientée vers l'axe A-A'. La deuxième face 70 de la fente axiale 66 est essentiellement parallèle à la première face 68.To this end, and as shown in the Figure 2 , in the first dial 62 of the lattice 20, at least one radial pillar 50 comprises an axial slot 66 extending substantially parallel to the axis AA ′. The axial slot 66 includes a first face 68 oriented opposite the axis of the speaker AA 'and a second face 70 oriented towards the axis AA'. The second face 70 of the axial slot 66 is essentially parallel to the first face 68.

Dans le premier cadran 62 du treillis 20, la jupe axiale 54 comprend une fente axiale 74 s'étendant sensiblement parallèlement à l'axe A-A'. La fente axiale 74 comprend une première surface 76 orientée à l'opposé de l'axe A-A' et une deuxième surface 78 orientée vers l'axe A-A'. La deuxième surface 78 de la fente axiale 74 est essentiellement parallèle à la première surface 76.In the first dial 62 of the lattice 20, the axial skirt 54 comprises an axial slot 74 extending substantially parallel to the axis AA ′. The axial slot 74 comprises a first surface 76 oriented opposite the axis A-A 'and a second surface 78 oriented towards the axis A-A'. The second surface 78 of the axial slot 74 is essentially parallel to the first surface 76.

Comme illustré sur les Figures 4 et 5, la lame conductrice 64 présente une forme mince. Elle est avantageusement réalisée en cuivre.As illustrated on Figures 4 and 5 , the conductive strip 64 has a thin shape. It is advantageously made of copper.

Elle présente deux tronçons de maintien 88, 90 s'étendant axialement reliés l'un à l'autre par un tronçon radial 92 perpendiculaire. Le tronçon de maintien 88 est prolongé d'un tronçon de connexion radial 94 lui-même relié par soudure à une patte de connexion 95 portée par le porte-bobine 41 et prolongeant la bobine d'excitation 42.It has two holding sections 88, 90 extending axially connected to one another by a perpendicular radial section 92. The holding section 88 is extended by a radial connection section 94 itself connected by welding to a connection tab 95 carried by the coil holder 41 and extending the excitation coil 42.

Le tronçon de maintien 90 est prolongé par un ergot d'extrémité 96 sur laquelle est soudée la tresse 65.The holding section 90 is extended by an end lug 96 onto which the braid 65 is welded.

Les tronçons de maintien 88, 90 sont reçus dans la fente axiale 66 et la fente axiale 74 respectivement.The holding sections 88, 90 are received in the axial slot 66 and the axial slot 74 respectively.

Les tronçons de maintien 88, 90 chacun comporte sur sa face interne au moins une première saillie 98, respectivement au moins une deuxième saillie 102, en appui sur la première face 68 de la fente axiale 66, respectivement la première surface 76 de la fente axiale 74. La face externe du tronçon de maintien 88, respectivement du tronçon de maintien 90, est en appui sur la deuxième face 70 de la fente axiale 66, respectivement sur la deuxième surface 78 de la fente axiale 74.The holding sections 88, 90 each have on its internal face at least a first projection 98, respectively at least a second projection 102, bearing on the first face 68 of the axial slot 66, respectively the first surface 76 of the axial slot 74. The external face of the retaining section 88, respectively of the retaining section 90, is supported on the second face 70 of the axial slot 66, respectively on the second surface 78 of the axial slot 74.

Les tronçons de maintien 88, 90 chacun comporte également au moins une griffe de blocage 104 configurée pour pénétrer dans le treillis 20 de sorte à empêcher le déplacement de la lame conductrice 64 à vers la membrane convexe 18 suivant la direction axiale.The holding sections 88, 90 each also includes at least one locking claw 104 configured to penetrate the trellis 20 so as to prevent the displacement of the conductive strip 64 to the convex membrane 18 in the axial direction.

Le tronçon de maintien 88 comprend en outre un épaulement 106 configuré pour coopérer avec le treillis 20 de sorte à empêcher le déplacement de la lame conductrice 64 à l'écart de la membrane convexe 18 suivant la direction axiale.The holding section 88 further comprises a shoulder 106 configured to cooperate with the mesh 20 so as to prevent the displacement of the conductive strip 64 away from the convex membrane 18 in the axial direction.

Les griffes de blocage 104 et l'épaulement 106 bloquent donc conjointement la position de la lame conductrice 64 suivant la direction axiale.The locking claws 104 and the shoulder 106 therefore jointly block the position of the conductive strip 64 in the axial direction.

Le tronçon de maintien 90 comprend en outre un épaulement 108 maintenu à distance par rapport au treillis 20, l'épaulement 108 et le treillis 20 présentant entre eux un jeu non nul sensiblement égal à 0,8 mm. Ce jeu évite notamment que l'épaulement 108 entre en butée contre le treillis 20 lors d'un éventuel fluage du treillis 20 qui pourrait causer une descente conséquente de la lame conductrice 64.The retaining section 90 further comprises a shoulder 108 kept at a distance from the trellis 20, the shoulder 108 and the trellis 20 having between them a non-zero clearance substantially equal to 0.8 mm. This game notably prevents the shoulder 108 comes into abutment against the trellis 20 during a possible creep of the trellis 20 which could cause a consequent descent of the conductive strip 64.

L'ergot d'extrémité 96 est configuré pour recevoir la tresse 65 d'alimentation électrique. Il présente avantageusement une forme de U convergente vers le fond de U pour maintenir la tresse 65 d'alimentation électrique.The end lug 96 is configured to receive the braid 65 for electrical supply. It advantageously has a U shape converging towards the bottom of U to maintain the braid 65 for electrical supply.

Le treillis 20 comprend à la base de deux piliers radiaux 50 deux taquets 110 (dont un est visible sur la Figure 6) de blocage temporaire des tresses 65 lors du montage du haut-parleur 10. Les taquets 110 définissent avec les piliers radiaux 50 des rainures dans lesquelles sont retenues les tresses 65 lors de la manipulation de l'équipage mobile 16 équipé du treillis 20 et de la membrane convexe 18 avant leur montage dans le châssis fixe 12 du haut-parleur 10.The trellis 20 comprises at the base of two radial pillars 50 two tabs 110 (one of which is visible on the Figure 6 ) temporarily blocking the braids 65 during assembly of the loudspeaker 10. The tabs 110 define with the radial pillars 50 grooves in which the braids 65 are retained during the handling of the moving element 16 equipped with the trellis 20 and the convex membrane 18 before their mounting in the fixed frame 12 of the loudspeaker 10.

Dans le deuxième cadran 63 du treillis 20, les piliers radiaux 50 sont dépourvus de fente axiale, et la jupe axiale 54 est dépourvue de rainure axiale. Le deuxième cadran 63 du treillis 20 est également dépourvue de lame conductrice 64.In the second dial 63 of the trellis 20, the radial pillars 50 are devoid of an axial slot, and the axial skirt 54 is devoid of an axial groove. The second dial 63 of the lattice 20 is also devoid of conductive strip 64.

La configuration asymétrique des première et deuxième cadrans 62, 63 du treillis 20 permet aux piliers radiaux 50 dans le premier cadran 62 de compenser le poids des lames conductrices 64 disposées dans le deuxième cadran 63. Ceci permet aux premier et deuxième cadrans 62, 63 de présenter un poids sensiblement identique de sorte à obtenir un haut-parleur 10 avec une bonne propriété d'équilibrage.The asymmetrical configuration of the first and second dials 62, 63 of the trellis 20 allows the radial pillars 50 in the first dial 62 to compensate for the weight of the conductive blades 64 arranged in the second dial 63. This allows the first and second dials 62, 63 to have a substantially identical weight so as to obtain a loudspeaker 10 with a good balancing property.

Le haut-parleur 10 comporte en outre un joint élastique de suspension 112 de la membrane convexe 18.The loudspeaker 10 also has an elastic suspension joint 112 for the convex membrane 18.

Le joint élastique de suspension 112 raccorde une extrémité supérieure de la paroi circonférentielle 30 à la jupe axiale 54 au voisinage de l'anneau externe 48. Le joint élastique de suspension 112 est disposé axialement moins éloigné de la membrane convexe 18 que l'anneau élastique de guidage 56.The elastic suspension seal 112 connects an upper end of the circumferential wall 30 to the axial skirt 54 in the vicinity of the outer ring 48. The elastic suspension seal 112 is disposed axially less distant from the convex membrane 18 than the elastic ring guide 56.

Le joint élastique de suspension 112 s'étend autour de l'axe A-A'. Il s'étend dans un plan radial. Le joint élastique de suspension 112 présente, en section selon un plan passant par l'axe A-A', une forme en Ω, la convexité de Ω étant tournée axialement vers l'arrière du haut-parleur 10.The elastic suspension joint 112 extends around the axis AA ′. It extends in a radial plane. The elastic suspension joint 112 has, in section along a plane passing through the axis AA ′, a shape in Ω, the convexity of Ω being turned axially towards the rear of the speaker 10.

Le joint élastique de suspension 112 est étanche à l'air.The elastic suspension joint 112 is airtight.

Grâce à l'invention décrite ci-dessus, une fixation rigidifiée de la membrane convexe 18 permet de réduire les modes de résonance non-souhaités et améliore ainsi la performance du haut-parleur 10 lorsque les sons produits présentent des fréquences élevées.Thanks to the invention described above, a rigidified fixing of the convex membrane 18 makes it possible to reduce the unwanted resonance modes and thus improves the performance of the speaker 10 when the sounds produced have high frequencies.

De plus, la lame conductrice 64 permet de mieux maintenir la position de la tresse 65 d'alimentation électrique par rapport à l'équipage mobile 16, ce qui élimine la nécessité de fournir des tresses 65 excessivement longues pour fournir de l'énergie électrique au haut-parleur 10.In addition, the conductive strip 64 makes it possible to better maintain the position of the braid 65 of electrical supply relative to the movable assembly 16, which eliminates the need to supply excessively long braids 65 to supply electrical energy to the speaker 10.

Claims (10)

Haut-parleur (10) électrodynamique, comportant : - un châssis fixe (12), - un moteur comportant une base fixe (14) reliée au châssis fixe (12) et un équipage mobile (16) axialement par rapport à la base fixe (14) suivant un axe (A-A'), - une membrane convexe (18) dont la convexité est orientée vers l'extérieur du haut-parleur (10), et - un treillis (20) reliant la membrane convexe (18) et l'équipage mobile (16), caractérisé en ce que le treillis (20) comprend un anneau interne (46) et un anneau externe (48) coaxiaux reliés ensemble par des piliers radiaux (50) et à une couronne (52) de fixation à une extrémité (53) de l'équipage mobile (16), la membrane convexe (18) étant fixée en appui sur les anneaux interne et externe (46, 48). Electrodynamic loudspeaker (10), comprising: - a fixed frame (12), - an engine comprising a fixed base (14) connected to the fixed chassis (12) and a movable assembly (16) axially with respect to the fixed base (14) along an axis (A-A '), - a convex membrane (18) whose convexity is oriented towards the outside of the loudspeaker (10), and - a trellis (20) connecting the convex membrane (18) and the movable assembly (16), characterized in that the trellis (20) comprises an inner ring (46) and an outer ring (48) coaxial connected together by radial pillars (50) and a crown (52) for fixing to one end (53) of the mobile assembly (16), the convex membrane (18) being fixed in abutment on the internal and external rings (46, 48) . Haut-parleur (10) électrodynamique selon la revendication 1, dans lequel la membrane convexe (18) présente un bord périphérique (44), l'anneau externe (48) étant directement fixé au bord périphérique (44) de la membrane convexe (18).Electrodynamic loudspeaker (10) according to claim 1, in which the convex membrane (18) has a peripheral edge (44), the external ring (48) being directly fixed to the peripheral edge (44) of the convex membrane (18) ). Haut-parleur (10) électromagnétique selon l'une quelconque des revendications précédentes, dans lequel le treillis (20) comprend une jupe axiale (54) solidaire des piliers radiaux (50) et s'étendant axialement à l'opposé des anneaux interne et externe (46, 48).Electromagnetic loudspeaker (10) according to any one of the preceding claims, in which the trellis (20) comprises an axial skirt (54) integral with the radial pillars (50) and extending axially opposite the internal rings and external (46, 48). Haut-parleur (10) électromagnétique selon l'une quelconque des revendications précédentes, dans lequel la couronne (52) de fixation comprend une gorge de réception (58) de l'extrémité (53) de l'équipage mobile (16), l'équipage mobile (16) étant avantageusement collé à la gorge de réception (58).Electromagnetic loudspeaker (10) according to any one of the preceding claims, in which the fixing ring (52) comprises a receiving groove (58) for the end (53) of the mobile assembly (16), l mobile assembly (16) being advantageously glued to the receiving groove (58). Haut-parleur (10) électromagnétique selon l'une quelconque des revendications précédentes, dans lequel le treillis (20) présente un premier et un deuxième cadrans (62, 63), s'étendant chacun sur 180° autour de l'axe (A-A'), le premier cadran (62) du treillis (20) comportant en outre au moins une lame conductrice (64) raccordant l'équipage mobile (16) à une tresse (65) d'alimentation électrique, le deuxième cadran (63) du treillis (20) étant dépourvu de telle lame conductrice.Electromagnetic loudspeaker (10) according to any one of the preceding claims, in which the trellis (20) has first and second dials (62, 63), each extending 180 ° around the axis (A -A '), the first dial (62) of the trellis (20) further comprising at least one conductive blade (64) connecting the movable assembly (16) to a braid (65) of electrical supply, the second dial ( 63) of the mesh (20) being devoid of such a conductive strip. Haut-parleur (10) électromagnétique selon la revendication 5, dans lequel la lame conductrice (64) comprend un ergot d'extrémité (96) configuré pour recevoir la tresse (65) d'alimentation électrique.An electromagnetic loudspeaker (10) according to claim 5, wherein the conductive blade (64) comprises an end lug (96) configured to receive the braid (65) for power supply. Haut-parleur (10) électromagnétique selon la revendication 5 ou 6, dans lequel la lame conductrice (64) est reçue entre deux faces (68, 70, 76, 78) essentiellement parallèles du treillis (20) et en ce que la lame conductrice (64) comporte sur une face interne une saillie (98, 102) en appui contre l'une des faces du treillis (20), la lame conductrice (64) étant en appui sur l'autre face de treillis (20) suivant son autre face.Electromagnetic loudspeaker (10) according to claim 5 or 6, in which the conductive strip (64) is received between two essentially parallel faces (68, 70, 76, 78) of the trellis (20) and in that the conductive strip (64) has on one side internally a projection (98, 102) bearing against one of the faces of the mesh (20), the conductive strip (64) being supported on the other face of the mesh (20) along its other face. Haut-parleur (10) électromagnétique selon l'une quelconque des revendications 5 à 7, dans lequel la lame conductrice (64) comprend au moins une griffe de blocage (104) configurée pour pénétrer dans le treillis (20) de sorte à empêcher le déplacement de la lame conductrice (64) à l'écart de la membrane convexe (18) suivant la direction de l'axe (A-A') du haut-parleur (10).An electromagnetic loudspeaker (10) according to any one of claims 5 to 7, in which the conductive blade (64) comprises at least one locking claw (104) configured to penetrate the trellis (20) so as to prevent the displacement of the conductive strip (64) away from the convex membrane (18) in the direction of the axis (A-A ') of the loudspeaker (10). Haut-parleur (10) électromagnétique selon l'une quelconque des revendications 5 à 8, dans lequel les piliers radiaux (50) sont répartis angulairement et en ce que la densité de piliers radiaux (50) est plus importante dans le deuxième cadran (63) du treillis (20) que dans le premier cadran (62) du treillis (20).Electromagnetic loudspeaker (10) according to any one of Claims 5 to 8, in which the radial pillars (50) are angularly distributed and in that the density of radial pillars (50) is greater in the second dial (63 ) of the trellis (20) as in the first dial (62) of the trellis (20). Haut-parleur (10) électromagnétique selon la revendication 3, comportant un anneau élastique de guidage (56) interposé entre le châssis fixe (12) et une extrémité libre (57) de la jupe axiale (54).Electromagnetic loudspeaker (10) according to claim 3, comprising an elastic guide ring (56) interposed between the fixed frame (12) and a free end (57) of the axial skirt (54).
EP19201924.8A 2018-10-08 2019-10-08 Electrodynamic loudspeaker comprising a lattice Active EP3637795B1 (en)

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FR1859322A FR3087068B1 (en) 2018-10-08 2018-10-08 ELECTRODYNAMIC LOUDSPEAKER COMPRISING A MESH

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JPS5942794Y2 (en) * 1980-05-07 1984-12-15 オンキヨー株式会社 dome type speaker
US4817165A (en) * 1987-01-27 1989-03-28 Amalaha Leonard D Acoustic speaker device with a diaphragm having a spider web type core
FR3014628A1 (en) * 2013-12-05 2015-06-12 Devialet COMPACT ELECTRODYNAMIC SPEAKER WITH CONVEX MEMBRANE

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FR3087068A1 (en) 2020-04-10
CN111010656B (en) 2022-09-27
JP2020078062A (en) 2020-05-21
US11076236B2 (en) 2021-07-27
CN111010656A (en) 2020-04-14
DK3637795T3 (en) 2022-07-04
EP3637795B1 (en) 2022-04-06
FR3087068B1 (en) 2022-01-21
US20200112795A1 (en) 2020-04-09

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