EP3637795B1 - Haut-parleur électrodynamique comportant un treillis - Google Patents

Haut-parleur électrodynamique comportant un treillis Download PDF

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Publication number
EP3637795B1
EP3637795B1 EP19201924.8A EP19201924A EP3637795B1 EP 3637795 B1 EP3637795 B1 EP 3637795B1 EP 19201924 A EP19201924 A EP 19201924A EP 3637795 B1 EP3637795 B1 EP 3637795B1
Authority
EP
European Patent Office
Prior art keywords
truss
loudspeaker
conductive strip
convex membrane
axis
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
EP19201924.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3637795A1 (fr
Inventor
Gaël Daveau
Sylvain Coutarel
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
Original Assignee
Devialet SA
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 Devialet SA filed Critical Devialet SA
Publication of EP3637795A1 publication Critical patent/EP3637795A1/fr
Application granted granted Critical
Publication of EP3637795B1 publication Critical patent/EP3637795B1/fr
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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
    • H04R9/06—Loudspeakers
    • 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
    • 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; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; 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; 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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

  • the present invention relates to an electrodynamic loudspeaker according to the preamble of claim 1.
  • FR 3 014 628 and JP S59 42794 describe a loudspeaker comprising a chassis, a motor and a convex membrane.
  • Such loudspeakers are generally used to produce sound 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 the shape of a dome with its convexity facing outwards.
  • the dome is attached to the end of a reel-carrying tube following a connecting ring formed in the middle position of the dome.
  • Such a loudspeaker does not, however, give complete satisfaction.
  • the 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 loudspeaker.
  • An object of the present invention is to provide a loudspeaker capable of producing good quality sound at high frequencies, even if the membrane has a large area.
  • the subject of the invention is an electrodynamic loudspeaker of the aforementioned type and according to the characterizing part of claim 1.
  • the loudspeaker is according to any one of claims 2 to 9.
  • 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 comprising a fixed base 14 connected to the fixed frame 12 and a moving assembly 16 axially movable relative to the fixed base 14.
  • Loudspeaker 10 also comprises a convex membrane 18 and a trellis 20 connecting the convex membrane 18 and the mobile assembly 16.
  • the fixed frame 12 is also known as the "salad bowl”. It comprises a bottom 28 and a circumferential wall 30 connecting the bottom 28.
  • the circumferential wall 30 has a frustoconical shape of the axis A-A' flared towards the front of the loudspeaker 10.
  • the fixed base 14 comprises a yoke 34 on which is arranged a magnet 35.
  • the yoke 34 defines at least one air gap 36.
  • the mobile assembly 16 comprises a cylindrical coil carrier 41 with axis A-A' on the outer surface of which is wound an excitation coil 42.
  • the excitation coil 42 is disposed in the air gap 36.
  • the excitation coil 42 is capable of oscillating 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 a dome.
  • the convex membrane 18 has a peripheral edge 44.
  • the peripheral edge 44 has a substantially circular shape centered on the axis A-A'.
  • the trellis 20 generally has an axis AA' (the axis AA' visible on the Figures 1 and 3 ). It includes an inner ring 46, an outer ring 48, and a plurality of radial pillars 50 connecting the inner ring 46 and the outer ring 48.
  • the trellis 20 also comprises a crown 52 for attachment to one end 53 of the reel 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 lattice 20 is formed by injection of 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 the latter, a set of lattices 20 and the convex membrane 18, on the fixed frame 12.
  • the elastic guide ring 56 extends around the axis A-A'. It extends in a radial plane.
  • the inner and outer rings 46, 48 are coaxial.
  • the outer ring 48 is larger in diameter than the inner ring 46.
  • the convex membrane 18 is mechanically fixed bearing on the inner and outer rings 46, 48 by gluing.
  • the outer ring 48 is directly attached to the peripheral edge 44 of the convex membrane 18.
  • the radial pillars 50 are distributed angularly around the axis A-A'. They each extend between the outer ring 48 and the crown 52 of fixing.
  • the fixing crown 52 has a smaller diameter than that of the internal ring 46.
  • the fixing crown 52 comprises a reception groove 58 in which is received the end 53 of the reel holder 41 of the moving assembly 16.
  • the reception groove 58 is advantageously glued to the reel holder 41.
  • the axial skirt 54 is integral with the radial pillars 50. It protrudes from the radial pillars 50 as far as the free end 57 and extends axially opposite the internal and external rings 46, 48. It extends substantially parallel to the axis A-A', and surrounds the latter.
  • the axial skirt 54 has a diameter between those of the inner and outer rings 46, 48.
  • Lattice 20 has first and second dials 62, 63 separated by a plane BB' passing through axis A-A'. As seen on the Figure 3 , the density of radial pillars 50 is greater in the second quadrant 63 of the trellis 20 than in the first quadrant 62 of the trellis 20.
  • the first dial 62 of the trellis 20 also comprises at least two conductive strips 64.
  • the conductive strip 64 connects the excitation coil 42 of the mobile assembly 16 to a braid 65 of electrical supply.
  • Each conductive blade 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 A-A'.
  • the axial slot 66 comprises a first face 68 oriented away from the axis of the loudspeaker AA' and a second face 70 oriented towards the axis A-A'.
  • the second face 70 of the axial slot 66 is essentially parallel to the first face 68.
  • the axial skirt 54 includes an axial slot 74 extending substantially parallel to the axis A-A'.
  • the axial slot 74 includes a first surface 76 facing away from the A-A' axis and a second surface 78 facing the A-A' axis.
  • the second surface 78 of the axial slot 74 is substantially parallel to the first surface 76.
  • the conductive blade 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 each other by a radial section 92 perpendicular.
  • the holding section 88 is extended by a radial connection section 94 itself connected by welding to a connection lug 95 carried by the coil carrier 41 and extending the excitation coil 42.
  • the holding section 90 is extended by an end lug 96 to which the braid 65 is welded.
  • Holding sections 88, 90 are received in axial slot 66 and axial slot 74 respectively.
  • the holding sections 88, 90 each have on their internal face at least one first projection 98, respectively at least one second projection 102, resting on the first face 68 of the axial slot 66, respectively the first surface 76 of the axial slot 74.
  • the holding sections 88, 90 each also comprise at least one locking claw 104 configured to penetrate the trellis 20 so as to prevent the displacement of the conductive blade 64 towards 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 blade 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 holding section 90 further comprises a shoulder 108 held at a distance relative to the trellis 20, the shoulder 108 and the trellis 20 having between them a non-zero clearance substantially equal to 0.8 mm. This play prevents in particular that the shoulder 108 comes into abutment against the mesh 20 during a possible creep of the mesh 20 which could cause a consequent descent of the conductive blade 64.
  • the end lug 96 is configured to receive the braid 65 power supply. It advantageously has a U-shape converging towards the bottom of the U to hold the braid 65 of the electrical supply.
  • Lattice 20 comprises at the base of two radial pillars 50 two cleats 110 (one of which is visible on the Figure 6 ) temporary blocking of the braids 65 during the assembly of the loudspeaker 10.
  • the cleats 110 define with the radial pillars 50 grooves in which the braids 65 are retained during the manipulation of the mobile assembly 16 equipped with the trellis 20 and the convex membrane 18 before they are mounted in the fixed frame 12 of the loudspeaker 10.
  • the radial pillars 50 have no axial slot, and the axial skirt 54 has no axial groove.
  • the second dial 63 of the trellis 20 also has no conductive blade 64.
  • the asymmetrical configuration of the first and second quadrants 62, 63 of the trellis 20 allows the radial pillars 50 in the first quadrant 62 to compensate for the weight of the conductive blades 64 disposed in the second quadrant 63. This allows the first and second quadrants 62, 63 to present a substantially identical weight so as to obtain a loudspeaker 10 with a good balancing property.
  • the loudspeaker 10 further comprises an elastic joint 112 for suspending the convex membrane 18.
  • the elastic suspension joint 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 joint 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 A-A'. It extends in a radial plane.
  • the elastic suspension joint 112 has, in section along a plane passing through the axis A-A', an ⁇ shape, the convexity of ⁇ being turned axially towards the rear of the loudspeaker 10.
  • the elastic suspension seal 112 is airtight.
  • a stiffened fixing of the convex membrane 18 makes it possible to reduce the undesired resonance modes and thus improves the performance of the loudspeaker 10 when the sounds produced have high frequencies.
  • the conductive blade 64 makes it possible to better maintain the position of the electrical supply braid 65 with respect to the mobile assembly 16, which eliminates the need to provide excessively long braids 65 to supply electrical energy to the loudspeaker 10.

Landscapes

  • 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)
EP19201924.8A 2018-10-08 2019-10-08 Haut-parleur électrodynamique comportant un treillis Active EP3637795B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1859322A FR3087068B1 (fr) 2018-10-08 2018-10-08 Haut-parleur electrodynamique comportant un treillis

Publications (2)

Publication Number Publication Date
EP3637795A1 EP3637795A1 (fr) 2020-04-15
EP3637795B1 true EP3637795B1 (fr) 2022-04-06

Family

ID=65685558

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19201924.8A Active EP3637795B1 (fr) 2018-10-08 2019-10-08 Haut-parleur électrodynamique comportant un treillis

Country Status (6)

Country Link
US (1) US11076236B2 (da)
EP (1) EP3637795B1 (da)
JP (1) JP7461126B2 (da)
CN (1) CN111010656B (da)
DK (1) DK3637795T3 (da)
FR (1) FR3087068B1 (da)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3167817A1 (fr) * 2024-10-18 2026-04-24 Devialet Haut-parleur électrodynamique comprenant un anneau d’amortissement
FR3167818A1 (fr) * 2024-10-18 2026-04-24 Devialet Haut-parleur électrodynamique

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5942794Y2 (ja) * 1980-05-07 1984-12-15 オンキヨー株式会社 ド−ム型スピ−カ−
US4817165A (en) * 1987-01-27 1989-03-28 Amalaha Leonard D Acoustic speaker device with a diaphragm having a spider web type core
JP3942813B2 (ja) * 2000-08-03 2007-07-11 パイオニア株式会社 スピーカおよびその組立方法
JP2005252924A (ja) * 2004-03-08 2005-09-15 Matsushita Electric Ind Co Ltd スピーカ
JP4328245B2 (ja) 2004-03-19 2009-09-09 パイオニア株式会社 スピーカ装置及びその製造方法
US7970162B2 (en) * 2006-10-03 2011-06-28 Sound Sources Technology, Inc. Loudspeaker bobbin interconnection assembly
JP4851534B2 (ja) * 2006-11-17 2012-01-11 パイオニア株式会社 スピーカ
US8131000B2 (en) * 2007-08-16 2012-03-06 Hi-Tech Sound System Co., Ltd. Cooling arrangement for voice coil of speaker
US20110044491A1 (en) * 2009-08-23 2011-02-24 Plastoform Industries Ltd. Long excursion loudspeaker with closed magnetic circuit and ribbed robbin extending through slotted yoke
GB2480457B (en) * 2010-05-19 2014-01-08 Gp Acoustics Uk Ltd Loudspeaker
CN101841757A (zh) * 2010-06-10 2010-09-22 常州市武进攀特电子有限公司 一种便携式超薄型扬声器
US9467783B2 (en) * 2013-10-25 2016-10-11 Tymphany Worldwide Enterprises Limited Low profile loudspeaker transducer
FR3014628B1 (fr) * 2013-12-05 2017-04-21 Devialet Haut-parleur electrodynamique compact a membrane convexe
US9025809B1 (en) * 2014-01-03 2015-05-05 Rockford Corporation Voicecoil affixation
DE102014218427B4 (de) * 2014-09-15 2016-06-02 Kendrion Kuhnke Automotive GmbH Lautsprecher, insbesondere elektrodynamischer Lautsprecher
US20160127832A1 (en) * 2014-10-30 2016-05-05 Meiloon Industrial Co., Ltd. Speaker diaphragm supporting structure
GB2542382A (en) * 2015-09-17 2017-03-22 Gp Acoustics (Uk) Ltd Low-profile loudspeaker
WO2019053714A1 (en) * 2017-09-17 2019-03-21 Mordechai Oren DUAL PROFILE DRIVE WITH LOW PROFILE

Also Published As

Publication number Publication date
CN111010656A (zh) 2020-04-14
FR3087068A1 (fr) 2020-04-10
JP7461126B2 (ja) 2024-04-03
FR3087068B1 (fr) 2022-01-21
US11076236B2 (en) 2021-07-27
US20200112795A1 (en) 2020-04-09
JP2020078062A (ja) 2020-05-21
DK3637795T3 (da) 2022-07-04
EP3637795A1 (fr) 2020-04-15
CN111010656B (zh) 2022-09-27

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