EP2524521B1 - Kuppelförmiger elektrodynamischer wandler mit einer schwimmenden aufhängung - Google Patents

Kuppelförmiger elektrodynamischer wandler mit einer schwimmenden aufhängung Download PDF

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Publication number
EP2524521B1
EP2524521B1 EP11707443.5A EP11707443A EP2524521B1 EP 2524521 B1 EP2524521 B1 EP 2524521B1 EP 11707443 A EP11707443 A EP 11707443A EP 2524521 B1 EP2524521 B1 EP 2524521B1
Authority
EP
European Patent Office
Prior art keywords
transducer
suspension
support
diaphragm
bass
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.)
Not-in-force
Application number
EP11707443.5A
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English (en)
French (fr)
Other versions
EP2524521A1 (de
Inventor
Yoann Flavignard
Philippe Lesage
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.)
La Manufacture Devialet
Original Assignee
PHL AUDIO
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 PHL AUDIO filed Critical PHL AUDIO
Publication of EP2524521A1 publication Critical patent/EP2524521A1/de
Application granted granted Critical
Publication of EP2524521B1 publication Critical patent/EP2524521B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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
    • H04R9/046—Construction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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
    • H04R9/041—Centering
    • H04R9/043—Inner suspension or damper, e.g. spider
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/025—Diaphragms comprising polymeric materials
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/027—Diaphragms comprising metallic materials
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/029—Diaphragms comprising fibres
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones

Definitions

  • the voice coil is generally fixed on the periphery of an opening made in the center of the membrane.
  • the size and mass of the moving equipment are relatively large, which makes this type of architecture particularly suitable for the production of transducers designed for the reproduction of the bass and the medium, requiring relatively low frequency membrane vibrations, but of great amplitude.
  • a conical diaphragm electrodynamic transducer comprising: a magnetic circuit defining an air gap, a movable assembly comprising a diaphragm having a domed portion and a movable coil integral with the diaphragm and dive into the gap; a support to which the mobile equipment is suspended; a suspension providing the connection between the mobile equipment and the support.
  • This transducer is characterized in that the suspension is floating relative to the support.
  • the support comprises a peripheral groove.
  • the suspension is in the form of a ring whose outer edge is embedded in the groove, and wherein the groove being delimited by two flanges vis-à-vis, the suspension is constrained between the flanges.
  • a lubricant (preferably pasty) may be interposed between the suspension and the support.
  • the invention proposes an acoustic enclosure comprising a transducer or a coaxial loudspeaker system as described above.
  • the magnet 3 is preferably made of a rare earth neodymium-iron-boron alloy, which has the advantage of offering a high energy density (up to 12 times greater than that of a permanent magnet of ferrite barium).
  • the plate 21 extends into the lenticular internal volume delimited by the diaphragm 17 .
  • the plate 21 comprises a peripheral ring rim 26 and a central disc 27 to which is connected the stem 22 .
  • the disc 27 may be pierced with holes 28 whose function is to maximize the volume of air under the diaphragm 17 , so as to reduce the resonant frequency of the moving element 16.
  • the groove 29 separates the rim 26 in two flanges vis-à-vis forming the side walls of the groove 29 , namely a rear flange 31 , bearing against the front face 14 of the core 5 , and a front flange 32.
  • the flanges 31, 32 are connected by a cylindrical core 33 forming the bottom of the groove 29 .
  • the moving element 16 is mounted on the endoskeleton 20 by means of an inner suspension 34 which provides the connection between the diaphragm 17 and the plate 21 .
  • This suspension 34 is in the form of a ring made of a lightweight material, elastic, and non-emissive acoustically (we can choose a porous material for this purpose).
  • This material is preferably resistant to the heat prevailing in the transducer, and its elasticity is chosen so that the resonant frequency of the moving element 16 is lower than the lowest frequency reproduced by the transducer 1 (in this case 500 Hz at 2 kHz).
  • Crosslinked polymer foams for example polyester or melamine
  • the centering of the diaphragm 17 is achieved at the level of the voice coil 18 , which is adjusted with a small clearance on the core 5 and centers itself automatically with respect thereto, since the voice coil 18 , immersed in the magnetic field of the gap 15 , is set in motion by an electric modulation current.
  • the fins 51 do not meet on the axis A2 but stop at an inner end located at a distance from the axis A2 . At their apex, the fins 51 each have a curvilinear edge 53 .
  • the lateral wall 45 of the waveguide 44 is delimited internally by a discontinuous frustoconical front face 54 , distributed over a plurality of angular sectors 55 which extend between the fins 51 .
  • This front face 54 forms a flag primer extending from the inside to the outside and from a rear edge, formed by the petaloid ridge 52 constituting a groove of the flag primer 54 , to a front edge 56 which constitutes a mouth of the primer of Pavilion 54 .
  • the angular sectors 55 of the flag primer 54 are portions of a cone of revolution whose axis of symmetry coincides with the axis A2 , and whose generator is curvilinear (for example according to a circular law, exponential or hyperbolic).
  • the flag primer 54 ensures a continuous adaptation of acoustic impedance between the air environment delimited by the groove 52 and the air medium delimited by the mouth 56 .
  • the bass transducer 62 further comprises a chassis 78 called salad bowl, which includes a base 79 through which the salad bowl 78 is fixed on the magnetic circuit 64 - and more precisely on the front face 75 of the front plate 67 -, a ring 80 by which the transducer 62 is fixed to a supporting structure, and a plurality of branches 81 connecting the base 79 to the ring 80 .
  • the bass transducer 62 further comprises a mobile unit 82 including a membrane 83 and a voice coil 84 comprising a solenoid 85 wound on a cylindrical support 86 integral with the membrane 83 .
  • the compactness of the magnetic circuit 2 (in particular its small thickness) is made possible by the use of a permanent neodymium-iron-boron magnet 3 .
  • a permanent neodymium-iron-boron magnet 3 would have been futile if the diaphragm 17 had been made in a conventional manner, including a peripheral suspension.
  • the respective geometries in particular (but not only) the thicknesses of the magnetic circuits 2 , 64 and the curvature (and consequently the depth) of the membrane 83 , are preferably adapted to allow at least approximate coincidence of the acoustic centers C1 and C2 of the transducers 1 , 62 , such that the temporal offset between the acoustic radiation of the transducers 1 , 62 is imperceptible (this is called temporal alignment of the transducers 1 , 62 ).
  • the system 63 can then be considered as perfectly coherent despite the duality of the sound sources.

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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)

Claims (18)

  1. Elektrodynamischer Transduktor (1), umfassend:
    - einen magnetischen Kreis (2), der einen Luftspalt (15) definiert,
    - eine bewegliche Ausrüstung (16), umfassend eine kuppelförmige Membran (17) und eine bewegliche Spule (1), die fest mit der Membran (17) verbunden ist und in den Luftspalt (15) eintaucht;
    - einen Träger (20), an dem die bewegliche Ausrüstung (16) aufgehängt ist;
    - eine Aufhängung (34), die die Verbindung zwischen der mobilen Ausrüstung (16) und dem Träger (20) gewährleistet;
    wobei der genannte Transduktor (1) dadurch gekennzeichnet ist, dass die Aufhängung (34) die Form eines Rings aufweist, von dem ein innerer Rand in einer umlaufenden Auskehlung (39) des Trägers (20) aufgenommen ist, der durch zwei gegenüber liegende Backen (31, 32) begrenzt ist, wobei die Aufhängung (34) zwischen den Backen (31, 2) leicht vorgespannt ist, wobei ein ringförmiger Raum (37) zwischen der Aufhängung (34) und einem Steg (33) des Trägers (20) angeordnet ist und ein radiales Spiel zwischen der Aufhängung (34) und dem Steg (33) definiert, wobei die Aufhängung (34) somit im Verhältnis zum Träger (20) schwebend ist und einen radialen Freiheitsgrad durch Gleiten der Aufhängung (34) auf den Backen (31, 32) zulässt.
  2. Transduktor (1) gemäß Anspruch 1, bei dem ein Spiel von mehr als 0,1 mm zwischen der Aufhängung (34) und dem Steg (33) angeordnet ist, der den Boden der Auskehlung (29) bildet.
  3. Transduktor (1) gemäß einem der Ansprüche 1 oder 2, bei dem der Träger (20) eine Platine (21), bei der die umlaufende Auskehlung (29) angeordnet ist, und einen mit der Platine (21) fest verbundenen Stift (22) und durch den der Träger (20) am magnetischen Kreis (2) befestigt ist, umfasst.
  4. Transduktor (1) gemäß einem der Ansprüche 1 bis 3, bei dem das Verhältnis zwischen einer freien Länge und einer Dicke der Aufhängung (34) geringer ist als 5.
  5. Transduktor (1) gemäß einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der in der Auskehlung (29) aufgenommene Teil der Aufhängung (34) eine Breite hat, die größer als oder gleich ihrer Dicke ist.
  6. Transduktor (1) gemäß einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass eine dickflüssige Schmierschicht auf die Backen (31, 32) angewendet ist.
  7. Transduktor (1) gemäß einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Aufhängung (34) aus einem elastischen und akustisch nicht leitenden Material realisiert ist.
  8. Transduktor (1) gemäß Anspruch 7, bei dem die Aufhängung (34) in einem vernetzten Polymerschaum, wie z. B. Melaminschaum, realisiert ist.
  9. Transduktor (1) gemäß Anspruch 7, bei dem die Aufhängung (34) aus einem Gewebe oder einem Vlies aus natürlichen oder synthetischen Fasern oder einer Mischung aus natürlichen und synthetischen Fasern realisiert ist, wobei diese Fasern mit einem Harz imprägniert und warmgeformt sind.
  10. Transduktor (1) gemäß einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Aufhängung (34) einen geraden inneren Rand (35) und einen deutlich kegelstumpfartigen äußeren Rand (36) umfasst.
  11. Transduktor (1) gemäß Anspruch 10, dadurch gekennzeichnet, dass die Aufhängung (34) durch ihren äußeren Rand (36) auf dem umlaufenden Abschnitt (30) der inneren Oberfläche der Membran (17) befestigt ist.
  12. Transduktor (1) gemäß einem der voranstehenden Ansprüche, bei dem wenigstens eine der Wände des Luftspalts (15) mit einer Schicht aus einem Material mit niedrigem Reibungskoeffizienten beschichtet ist, wie z. B. PTFE.
  13. Transduktor (1) gemäß einem der voranstehenden Ansprüche, bei dem der Luftspalt (15) und die bewegliche Spule (18) derart ausgelegt sind, dass der Belegungsgrad der beweglichen Spule (18) in dem Luftspalt (15) höher als oder gleich 50 % ist.
  14. Transduktor (1) gemäß einem der voranstehenden Ansprüche, bei dem der magnetische Kreis (2) ein polares Stück (5), um das die mobile Spule (18) positioniert ist, mit einem Spiel von weniger als ein Zehntel Millimeter zwischen ihnen umfasst.
  15. Transduktor (1) gemäß einem der voranstehenden Ansprüche, bei dem ein Schmiermittel zwischen der Aufhängung (34) und dem Träger (20) zwischengeschaltet ist.
  16. Koaxiales Lautsprechersystem (63) mit wenigstens zwei Kanälen, umfassend einen Transduktor (62) der Bässe, der zur Wiedergabe der Bässe und / oder der mittleren Töne ausgelegt ist, und einen elektrodynamischen Transduktor (1) gemäß einem der voranstehenden Ansprüche, der für die Wiedergabe der hohen Töne ausgelegt ist.
  17. System (63) gemäß Anspruch 16, bei dem der Transduktor (1) der hohen Töne koaxial und frontal im Verhältnis zum Transduktor (62) der Bässe montiert ist.
  18. Lautsprecherbox (95), umfassend einen Transduktor (1) gemäß einem der Ansprüche 1 bis 15 oder ein System (63) gemäß einem der Ansprüche 16 oder 17
EP11707443.5A 2010-01-15 2011-01-14 Kuppelförmiger elektrodynamischer wandler mit einer schwimmenden aufhängung Not-in-force EP2524521B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1000156A FR2955446B1 (fr) 2010-01-15 2010-01-15 Transducteur electrodynamique a dome et suspension flottante
PCT/FR2011/000025 WO2011086302A1 (fr) 2010-01-15 2011-01-14 Transducteur électrodynamique à dôme et suspension flottante

Publications (2)

Publication Number Publication Date
EP2524521A1 EP2524521A1 (de) 2012-11-21
EP2524521B1 true EP2524521B1 (de) 2018-12-19

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Application Number Title Priority Date Filing Date
EP11707443.5A Not-in-force EP2524521B1 (de) 2010-01-15 2011-01-14 Kuppelförmiger elektrodynamischer wandler mit einer schwimmenden aufhängung

Country Status (7)

Country Link
US (1) US8989429B2 (de)
EP (1) EP2524521B1 (de)
CN (1) CN102884813B (de)
BR (1) BR112012017573A2 (de)
CA (1) CA2787165C (de)
FR (1) FR2955446B1 (de)
WO (1) WO2011086302A1 (de)

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US20130114846A1 (en) 2013-05-09
WO2011086302A1 (fr) 2011-07-21
CN102884813A (zh) 2013-01-16
CN102884813B (zh) 2015-08-12
BR112012017573A2 (pt) 2016-08-16
EP2524521A1 (de) 2012-11-21
FR2955446B1 (fr) 2015-06-05
CA2787165C (fr) 2019-11-26
US8989429B2 (en) 2015-03-24
FR2955446A1 (fr) 2011-07-22
CA2787165A1 (fr) 2011-07-21

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