EP3637788B1 - Elektrodynamischer lautsprecher, der eine elastische halterung zum stützen eines flexiblen leiters umfasst - Google Patents

Elektrodynamischer lautsprecher, der eine elastische halterung zum stützen eines flexiblen leiters umfasst 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
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.)
Active
Application number
EP19201696.2A
Other languages
English (en)
French (fr)
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EP3637788A1 (de
Inventor
Sylvain Coutarel
Gaël Daveau
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.)
Devialet SA
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Devialet SA
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Publication date
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Publication of EP3637788A1 publication Critical patent/EP3637788A1/de
Application granted granted Critical
Publication of EP3637788B1 publication Critical patent/EP3637788B1/de
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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
    • 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.

Landscapes

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

Claims (7)

  1. Elektrodynamischer Lautsprecher (10), umfassend:
    - einen festen Rahmen (12),
    - einen Motor (14), der an dem festen Rahmen (12) befestigt ist, wobei der Motor (14) mindestens einen Luftspalt (24) definiert, und
    - ein bewegliches Sensorteil (16) in Bezug auf den festen Rahmen (12), entlang einer Achse (A-A'), das bewegliche Sensorteil (16) umfassend:
    > eine konvexe Membran (30), deren Konvexität zu der Außenseite des Lautsprechers (10) ausgerichtet ist, und
    > eine Erregerspule (28) der Membran (30), wobei die Erregerspule (28) in dem Luftspalt (24) angeordnet ist und die Achse (A-A') des Lautsprechers (10) definiert,
    - einen flexiblen Leiter (36), der elektrisch mit der Erregerspule (28) verbunden ist und an einem Ende mechanisch mit dem festen Rahmen (12) beabstandet von seinem Verbindungsende mit der Erregerspule (28) verbunden ist,
    der Lautsprecher (10) ferner umfassend eine elastische Halterung (38), die an dem festen Rahmen (12) befestigt und konfiguriert ist, um den flexiblen Leiter (36) zu halten,
    die elastische Halterung (38) umfassend eine Längsnut (56) aufweist, in der der flexible Leiter (36) aufgenommen ist,
    dadurch gekennzeichnet, dass jede Längsnut (56) eine sich aufweitende Neigung in Richtung der konvexen Membran (30) aufweist.
  2. Elektromagnetischer Lautsprecher (10) nach Anspruch 1, wobei die elastische Halterung (38) eine Innenfläche (46), die zu der Achse (A-A') des Lautsprechers (10) ausgerichtet ist, und eine Außenfläche (48), die weg von der Achse (A-A') des Lautsprechers (10) ausgerichtet ist, aufweist,
    die Innenfläche (46) der elastischen Halterung (38) an dem festen Rahmen (12) befestigt ist.
  3. Elektromagnetischer Lautsprecher (10) nach Anspruch 1, wobei die Längsnut (56) an ihrem Rand durch Haltelippen (58) des flexiblen Leiters (36) in der Längsnut (56) begrenzt ist, wobei diese Lippen (58) die Längsnut (56) teilweise verschließen.
  4. Elektromagnetischer Lautsprecher (10) nach Anspruch 1 oder 3, wobei der flexible Leiter (36) axial frei in der Längsnut (56) montiert ist.
  5. Elektromagnetischer Lautsprecher (10) nach einem der vorherigen Ansprüche, wobei die elastische Halterung (38) zwei Schenkel (52) umfasst, die durch eine selbe Basis (50) verbunden sind, wobei jeder Schenkel (52) konfiguriert ist, um einen flexiblen Leiter (36) zu halten.
  6. Elektromagnetischer Lautsprecher (10) nach einem der vorherigen Ansprüche, wobei die elastische Halterung (38) aus einem Elastomermaterial, z. B. Butadien-Acrylnitril oder einem thermoplastischen Elastomermaterial, gefertigt ist.
  7. Elektromagnetischer Lautsprecher (10) nach einem der vorherigen Ansprüche, wobei die flexible Halterung (38) eine Shore A-Härte zwischen 60 und 80 aufweist.
EP19201696.2A 2018-10-08 2019-10-07 Elektrodynamischer lautsprecher, der eine elastische halterung zum stützen eines flexiblen leiters umfasst Active EP3637788B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1859323A FR3087070B1 (fr) 2018-10-08 2018-10-08 Haut-parleur electrodynamique comportant un support elastique pour soutenir un conducteur souple

Publications (2)

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

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19201696.2A Active EP3637788B1 (de) 2018-10-08 2019-10-07 Elektrodynamischer lautsprecher, der eine elastische halterung zum stützen eines flexiblen leiters umfasst

Country Status (3)

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EP (1) EP3637788B1 (de)
DK (1) DK3637788T3 (de)
FR (1) FR3087070B1 (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59111393U (ja) * 1983-01-14 1984-07-27 株式会社ケンウッド スピ−カ−等におけるリ−ド線保持構造
DE3804542C2 (de) * 1988-02-13 1995-04-06 Nokia Deutschland Gmbh Lautsprecheranschluß mit Zugentlastung
JP4876292B2 (ja) * 2000-01-27 2012-02-15 ノウルズ、エレクトロニクス、アジア、プライベート、リミテッド 可動コイル及び可動コイルの接続リード線用の弾性保持要素を有する電気音響変換器
JP2005354449A (ja) * 2004-06-11 2005-12-22 Pioneer Electronic Corp スピーカ装置及びその製造方法
CN105075290B (zh) * 2013-03-27 2018-06-22 松下知识产权经营株式会社 扬声器及其制造方法

Also Published As

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

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