EP3892010B1 - Versteifungsteil für ein lautsprechergehäuse - Google Patents

Versteifungsteil für ein lautsprechergehäuse

Info

Publication number
EP3892010B1
EP3892010B1 EP19802179.2A EP19802179A EP3892010B1 EP 3892010 B1 EP3892010 B1 EP 3892010B1 EP 19802179 A EP19802179 A EP 19802179A EP 3892010 B1 EP3892010 B1 EP 3892010B1
Authority
EP
European Patent Office
Prior art keywords
loudspeaker
face
stiffener part
cabinet
enclosure
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
EP19802179.2A
Other languages
English (en)
French (fr)
Other versions
EP3892010A1 (de
Inventor
Hugo CHUSSEAU
Gilles Bourgoin
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.)
Sagemcom Broadband SAS
Original Assignee
Sagemcom Broadband SAS
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 Sagemcom Broadband SAS filed Critical Sagemcom Broadband SAS
Publication of EP3892010A1 publication Critical patent/EP3892010A1/de
Application granted granted Critical
Publication of EP3892010B1 publication Critical patent/EP3892010B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • H04R1/2803—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means 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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/025—Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture
    • 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
    • H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
    • H04R1/2873—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself 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
    • 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
    • H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
    • H04R1/2892—Mountings or supports for transducers
    • H04R1/2896—Mountings or supports for transducers for loudspeaker transducers

Definitions

  • An enclosure consists of a cabinet and one or more loudspeakers.
  • One or more sides of the cabinet include one or more openings, each designed to accommodate a loudspeaker.
  • a second mode of vibration results from a pendulum movement of the magnets 4 of the loudspeakers 3.
  • the magnet 4 of each loudspeaker 3 undergoes a rotational movement around a pendulum axis X2 which passes through the center of the membrane and which is perpendicular to the longitudinal axis of the loudspeaker 3 (see Figure 2 ).
  • This rotational movement is also due to the relatively large mass of the magnet 4 and the relative flexibility of the sheet metal of the loudspeaker 3.
  • the enclosure 11 firstly comprises a box 12 and a plurality of loudspeakers.
  • the box 12 has a generally parallelepiped external shape.
  • the box 12 comprises an upper face, here called first face 14, four lateral faces, among which there are two opposite faces (i.e. located one opposite the other) here called second face 15 and third face 16, and a lower face, here called fourth face 17.
  • the plurality of speakers includes a first speaker 18a and a second speaker 18b, as well as other speakers which will not be described herein.
  • the first loudspeaker 18a and the second loudspeaker 18b here each comprise a membrane 19, a sheet 20 called a “salad bowl” in which the membrane 19 extends, a coil and a magnet 21.
  • Each magnet 21 here has a truncated cone shape whose radius decreases towards the rear of the loudspeaker 18.
  • the “front part” of each loudspeaker 18 the part which comprises the membrane 19, and the “rear part” the part on the side opposite the membrane 19.
  • the rear part therefore here comprises the magnet 21.
  • the first loudspeaker 18a is mounted on the first face 14 of the box 12.
  • the first loudspeaker 18a is fixed to the first face 14, the longitudinal axis X4 of the first loudspeaker 18a being perpendicular to the first face 14.
  • the first face 14 has an opening whose shape coincides with the circumference of the large diameter of the membrane 19 of the first loudspeaker 18a and into which the membrane 19 opens.
  • the stiffening part 25 is made of a thermoplastic material.
  • the stiffening part 25 firstly comprises a connecting portion 26 (which could also be called a “beam”).
  • the stiffening part 25 further comprises a first damping support 30a and a second damping support 30b.
  • the first damping support 30a and the second damping support 30b are located at a central portion of the connecting portion 26.
  • the first damping support 30a defines a receiving space 31 having a general shape of revolution, in this case a truncated cone shape.
  • the axis of revolution X6 of the receiving space 31 is orthogonal to the connecting axis X5 of the connecting portion 26.
  • Each rib 34 comprises a base 35, located at the bottom 32 of the receiving space 31, and a free end 36.
  • Each rib 34 has a notch 37 formed opposite the receiving space 31, so that the width of each rib 34 decreases from the base 35 of the rib 34 to the free end 36 of the rib 34.
  • the truncated cone shape of the receiving space 31 is defined by the notches 37 formed in the ribs 34.
  • the second damping support 30b has the same shape as the first damping support 30a.
  • the receiving space 31 of the first damping support 30a and that of the second damping support 30b have a coincident axis of revolution X6, so that, looking along this axis of revolution X6, the first damping support 30a and the second damping support 30b are superimposed.
  • the ribs 34 of the first damping support 30a are defined in continuity and in the extension of the ribs 34 of the second damping support 30b: these are the same ribs 34 which each comprise a half rib belonging to the first damping support 30a and a half rib belonging to the second damping support 30b.
  • each damping device 40 has a truncated external shape, and has a relatively small thickness.
  • the large radius face 41 of the damping device 40 is completely open, while the small radius face 42 of the damping device 40 is partially closed while having a central opening 43.
  • the central opening 43 allows the suction and evacuation of the air masses displaced by the movement of the membrane 19.
  • the connecting portion 26 of the stiffening piece 25 connects the internal walls of the second face 15 of the box 12 and the third face 16 of the box 12 together.
  • the rear part of the first loudspeaker 18a bears against the damping device 40a positioned in the receiving space 31 of the first damping support 30a.
  • the rear part of the second loudspeaker 18b bears against the damping device 40b positioned in the receiving space 31 of the second damping support 30b.
  • the ribs 34 of the first damping support 30a and the ribs 34 of the second damping support 30b are all perpendicular to the first face 14 and to the fourth face 17 of the box 12, and are all parallel to the longitudinal axis X3 of the box 12.
  • the stiffening part 25 is structured by the ribs 34 which also stiffen the box 12.
  • the ribs 34 prevent deformations by swelling of the box 12 caused by variations in internal pressure due to the displacement of the membranes 19 of the first loudspeaker 18a and the second loudspeaker 18b.
  • the use of the stiffening part 25 thus makes it possible to move the three main resonance frequencies of the enclosure 11 outside the range of use of the first loudspeaker 18a and the second loudspeaker 18b (and the other loudspeakers of the enclosure 11), that is to say here beyond 300Hz.
  • the stiffening part 25 therefore makes it possible, with a simple assembly of a plastic part and two elastomer washers, to eliminate the sources of vibration of the enclosure 11 causing parasitic noise.
  • the first 46a electrical board here includes a Wi-Fi antenna which does not interact with the speakers.
  • the second card holder 43b is arranged to accommodate a second electrical card 46b, which is positioned against the flat surface 44 of the second card holder 43b while being held in position between the four corners 45.
  • the second electrical card 46b is fixed to the second card holder 43b.
  • the second 46b electrical board here includes a Wi-Fi antenna which does not interact with the speakers.
  • Grooves 48 are formed on the damping supports 30 of the stiffening part 25. Electrical wires connected to the first electrical card 46a and to the second electrical card 46b run in the grooves 48. The grooves 48 make it possible to both hold these electrical wires in position and protect them.
  • the speaker(s) that cooperate with the stiffening piece are not necessarily mounted on an upper or lower face of the box.
  • the shape of the elements described could be different.
  • the magnet of each speaker could have a different shape (annular, cylindrical, etc.), as could the reception space of each support.
  • the stiffening part could belong to the box and form a single part with the box (or at least with the second face and/or the third face of the box). It should also be noted that, when we say that the connecting portion connects the internal walls of the second face of the box and the third face of the box, we do not necessarily mean that the connecting portion is directly fixed to the internal walls: the connecting portion could be fixed to any parts which are themselves integral with the internal walls.

Landscapes

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

Claims (14)

  1. Versteifungsteil (25), welches dafür ausgelegt ist, im Inneren eines Gehäuses (12) einer Lautsprecherbox (11) eingebaut zu werden, um das Gehäuse zu versteifen, wobei die Lautsprecherbox ferner zumindest einen an einer ersten Gehäuseseite (14) eingebauten Lautsprecher (18a) umfassen kann, wobei das Versteifungsteil einen Verbindungsabschnitt (26) und zumindest einen Dämpfungsträger (30a) enthält, der einen Aufnahmeraum (31) definiert, der dafür ausgelegt ist, eine Dämpfungsvorrichtung (40a) zur Begrenzung von Lautsprecher-Vibrationen aufzunehmen, wobei der Dämpfungsträger eine Mehrzahl von Rippen (34) umfasst, die um den Aufnahmeraum (31) herum verteilt sind, wobei sich jede Rippe in einer unterschiedlichen Ebene parallel zu einer Tiefe des Aufnahmeraums erstreckt, wobei das Versteifungsteil derart ausgelegt ist, dass der Verbindungsabschnitt (26) im zusammengebauten Zustand der Lautsprecherbox (11) Innenwände einer zweiten Gehäuseseite (15) und einer dritten Gehäuseseite (16), welche einander gegenüberliegen und beide senkrecht zu der ersten Seite (14) verlaufen, miteinander verbindet, dass die Dämpfungsvorrichtung in dem Aufnahmeraum positioniert ist und dass sich ein hinterer Abschnitt des Lautsprechers gegen die Dämpfungsvorrichtung abstützt.
  2. Versteifungsteil nach Anspruch 1, wobei der Aufnahmeraum (31) allgemein eine Rotationsform aufweist und wobei sich die Rippen (34) radial um den Aufnahmeraum herum erstrecken.
  3. Versteifungsteil nach einem der vorhergehenden Ansprüche, wobei jede Rippe (34) lamellenförmig ausgebildet ist.
  4. Versteifungsteil nach einem der vorhergehenden Ansprüche, wobei die Form des Aufnahmeraums (31) von den Ausschnitten (37) definiert ist, welche dem Aufnahmeraum zugewandt in den Rippen ausgebildet sind.
  5. Versteifungsteil nach einem der vorhergehenden Ansprüche, wobei jede Rippe (34) zwischen einer Rippenbasis (35) und einem freien Rippenende (36) eine abnehmende Breite aufweist, sodass der Aufnahmeraum (31) kegelstumpfförmig ausgebildet ist.
  6. Versteifungsteil nach einem der vorhergehenden Ansprüche, wobei der Verbindungsabschnitt zwei Enden aufweist, welche Befestigungsmittel (29) zur Befestigung des Versteifungsteils (25) an der zweiten Gehäuseseite (15) und an der dritten Gehäuseseite (16) umfassen.
  7. Versteifungsteil nach einem der vorhergehenden Ansprüche, wobei das Versteifungsteil aus einem thermoplastischen Werkstoff hergestellt ist.
  8. Versteifungsteil nach einem der vorhergehenden Ansprüche, wobei die Lautsprecherbox zumindest einen ersten, an der ersten Gehäuseseite (14) eingebauten Lautsprecher (18a) und einen zweiten, an einer vierten, der ersten Seite gegenüberliegenden Gehäuseseite (17) eingebauten Lautsprecher (18b) enthalten kann, wobei der erste Lautsprecher und der zweite Lautsprecher verkehrt zueinander eingebaut sind, wobei das Versteifungsteil einen ersten Dämpfungsträger (30a) und einen zweiten Dämpfungsträger (30b) umfasst, die verkehrt zueinander angeordnet sind.
  9. Versteifungsteil nach einem der vorhergehenden Ansprüche, ferner umfassend zumindest einen Kartenträger (43a), auf welchem eine elektrische Leiterkarte (46a) befestigt werden kann.
  10. Versteifungsteil nach Anspruch 9, umfassend zwei Kartenträger, die jeweils eine plan ausgebildete Oberfläche (44) aufweisen und die jeweils an einem Ende des Verbindungsabschnitts (26) angeordnet sind.
  11. Versteifungsteil nach Anspruch 9, ferner umfassend Nuten (48), die dafür ausgelegt sind, dass mit der elektrischen Leiterkarte verbundene Drähte in den Nuten geführt werden.
  12. Lautsprecherbox, umfassend ein Gehäuse, ein Versteifungsteil nach einem der vorhergehenden Ansprüche und eine Dämpfungsvorrichtung (40).
  13. Lautsprecherbox nach Anspruch 12, wobei die Dämpfungsvorrichtung (40) aus einem Elastomermaterial hergestellt ist.
  14. Lautsprecherbox nach Anspruch 12, umfassend ein Versteifungsteil (25) nach Anspruch 8, einen ersten, an einer ersten Gehäuseseite eingebauten Lautsprecher (18a), einen zweiten, an einer vierten Gehäuseseite eingebauten Lautsprecher (18b) sowie zwei Dämpfungsvorrichtungen, wobei der erste Lautsprecher und der zweite Lautsprecher verkehrt zueinander in der Lautsprecherbox eingebaut sind.
EP19802179.2A 2018-12-03 2019-11-14 Versteifungsteil für ein lautsprechergehäuse Active EP3892010B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1872244A FR3089380B1 (fr) 2018-12-03 2018-12-03 Pièce de rigidification pour caisson d’enceinte acoustique
PCT/EP2019/081406 WO2020114750A1 (fr) 2018-12-03 2019-11-14 Piece de rigidification pour caisson d'enceinte acoustique

Publications (2)

Publication Number Publication Date
EP3892010A1 EP3892010A1 (de) 2021-10-13
EP3892010B1 true EP3892010B1 (de) 2025-07-16

Family

ID=66166194

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19802179.2A Active EP3892010B1 (de) 2018-12-03 2019-11-14 Versteifungsteil für ein lautsprechergehäuse

Country Status (5)

Country Link
US (1) US11245979B1 (de)
EP (1) EP3892010B1 (de)
CN (1) CN113170258A (de)
FR (1) FR3089380B1 (de)
WO (1) WO2020114750A1 (de)

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3393764A (en) * 1966-12-27 1968-07-23 Curtiss R. Schafer Loudspeaker systems
DE3414407C2 (de) * 1984-04-17 1986-02-20 Jürgen 6804 Ilvesheim Quaas Anordnung von Schallwandlern in einer Schallführung, insbesondere für Lautsprecherboxen
JPH0326714Y2 (de) * 1986-02-24 1991-06-10
US4939783A (en) * 1989-01-30 1990-07-03 Dunning William S Suspended speaker system
FR2746246B1 (fr) * 1996-03-14 2002-11-29 Enceinte acoustique facilitant l'evacuation des parasites sonores
JP2001352592A (ja) * 2000-06-08 2001-12-21 Fujitsu Ten Ltd スピーカ構造
ES2712965T3 (es) * 2001-12-19 2019-05-16 Interdigital Madison Patent Holdings Dispositivo electrónico que comprende un altavoz
JP3965366B2 (ja) * 2003-03-19 2007-08-29 富士通テン株式会社 スピーカユニットの支持構造及びスピーカシステム
GB2402836B (en) * 2003-06-09 2006-12-20 Fujitsu Ten Ltd Speaker apparatus
US7764807B2 (en) * 2007-05-08 2010-07-27 Mitek Corp., Inc Speaker support systems
US8201659B2 (en) * 2007-10-19 2012-06-19 Kazumichi Imai Recoilless speaker system
JP2016127404A (ja) * 2014-12-26 2016-07-11 富士通テン株式会社 スピーカ装置および制振ユニット
US10645484B2 (en) * 2016-12-23 2020-05-05 Tadeusz Kwolek Loudspeaker cabinets, systems, and methods of construction

Also Published As

Publication number Publication date
BR112021009754A2 (pt) 2021-08-17
CN113170258A (zh) 2021-07-23
FR3089380B1 (fr) 2020-11-20
US20220021967A1 (en) 2022-01-20
FR3089380A1 (fr) 2020-06-05
US11245979B1 (en) 2022-02-08
EP3892010A1 (de) 2021-10-13
WO2020114750A1 (fr) 2020-06-11

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