EP0783238A2 - Méthode pour la production et l'application de bords à suspension annulaire pour diaphragmes de haut-parleurs - Google Patents

Méthode pour la production et l'application de bords à suspension annulaire pour diaphragmes de haut-parleurs Download PDF

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Publication number
EP0783238A2
EP0783238A2 EP96830629A EP96830629A EP0783238A2 EP 0783238 A2 EP0783238 A2 EP 0783238A2 EP 96830629 A EP96830629 A EP 96830629A EP 96830629 A EP96830629 A EP 96830629A EP 0783238 A2 EP0783238 A2 EP 0783238A2
Authority
EP
European Patent Office
Prior art keywords
edge
diaphragm
annular
annular suspension
production
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.)
Withdrawn
Application number
EP96830629A
Other languages
German (de)
English (en)
Other versions
EP0783238A3 (fr
Inventor
Carlo Sancisi
Franco Tontini
Mirco Dal Pra
Giancarlo Dal Pra
Arnillo Mondo
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.)
Meal-Srl
Sipe Italiana Prodotti Elettromeccanici - SpA Soc
Original Assignee
Meal-Srl
Sipe Italiana Prodotti Elettromeccanici - SpA Soc
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 Meal-Srl, Sipe Italiana Prodotti Elettromeccanici - SpA Soc filed Critical Meal-Srl
Publication of EP0783238A2 publication Critical patent/EP0783238A2/fr
Publication of EP0783238A3 publication Critical patent/EP0783238A3/fr
Withdrawn legal-status Critical Current

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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
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2231/00—Details of apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor covered by H04R31/00, not provided for in its subgroups
    • H04R2231/003—Manufacturing aspects of the outer suspension of loudspeaker or microphone diaphragms or of their connecting aspects to said diaphragms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H04R31/006—Interconnection of transducer parts
    • 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

Definitions

  • This design patent application concerns a method for the production and application of annular suspension edges of loud speaker diaphragms.
  • loud speaker diaphragms is that of a truncated cone with circular or ellipical cross-section: at the centre, the diaphragm is joined to the mobile coil, which is in turn supported, by means of an elastic disk, known as a centring element, to the sheet plate basket also having a truncated cone shape, which houses the diaphragm and to which the magnetic circuit is fixed externally.
  • Said diaphragm is provided on its larger surface with an elastic annular edge by means of which the same is suspended on the mouthpiece flange of the above basket, on which the external lip of said annular edge is glued.
  • annular suspension edges are obtained by cutting away the centre of a soft thin disk (or ellipse in the case of an elliptic loud speaker), moulded in plastic, generally polyurethane resin, and characterised by an annular groove having a semi-circular cross-section on its external circumference.
  • said annular groove is to make the suspension edge elastically deformable; said suspension edge shall support the diaphragm without however preventing it from following the oscillations of the mobile coil to which the diaphragm is attached, as mentioned above.
  • Said annular suspension edge is in fact provided with an external lip which is glued on the mouthpiece flange of the basket, and an internal lip which is glued on the edge of the diaphragm.
  • said suspension edges are first glued on the edge of the diaphragm which therefore is fitted with its annular suspension edge when it reaches the loud speaker assembly station.
  • the first problem is that during production, a quantity of off-cuts is produced whose mass is even greater than the product itself; as mentioned above, the annular suspension edge is obtained by cutting away the centre of a soft thin plastic disk, representing a scrap which is not only a waste of material but also a by no means negligible cost in terms of its disposal.
  • the current state of the art involves high labour costs for the workers who glue the annular suspension edge to the edge of the diaphragm since the gluing operation is not an easy one to automatise due to the difficulty in handling the two elements in question, especially the soft thin annular suspension edge.
  • the method according to the invention is designed to solve these two major problems of the current state of the art; according to said method the annular suspension edge is moulded directly on the edge of the diaphragm, which is preloaded into the edge mould. It is evident that this method on one hand eliminates the production of scraps and on the other eliminates the need for man power for the application of the annular suspension edge to the diaphragm in that during moulding of said edge the same is also automatically and simultaneously glued to the diaphragm.
  • the method according to the invention provides that the annular suspension edge (1) is moulded directly on the edge of the diaphragm (2) which is pre-loaded in the edge (1) mould.
  • the process according to the invention provides the additional advantage of eliminating the costs for the production and assembly of the gasket that is generally applied to the basket flange.
  • gasket (3) may also be moulded during moulding of the annular suspension edge (1); after the diaphragm (2) is mounted on the basket (4), the gasket (3) will be positioned exactly on the flange (4a) of the basket (4).
  • the process according to the invention therefore permits making the gasket (3) of the loud speaker basket (4) during the same moulding phase and in the same material as the suspension edge (1), said gasket consisting of suitably shaped annular ribbing on the external lip (1a) of the edge (1).
  • the diaphragm (2) is pre-loaded into the edge (1) mould so that edge (2a) of diaphragm (2) touches against and is automatically joined to the internal lip (1b) of edge (1).
  • This layer of plastic material (5) - obtained during the same moulding phase and in the same material as edge (1) - has two functions: the first is to make the diaphragm (2) impermeable, the second is to dampen the vibrations so as to act as a regulation element by means of which it is possible to modulate the tone of the diaphragm.
EP96830629A 1995-12-22 1996-12-17 Méthode pour la production et l'application de bords à suspension annulaire pour diaphragmes de haut-parleurs Withdrawn EP0783238A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT95MC000134A IT1281924B1 (it) 1995-12-22 1995-12-22 Metodo per la realizzazione e l'applicazione del bordo anulare di sospensione delle membrane degli altoparlanti
ITMC950134 1995-12-22

Publications (2)

Publication Number Publication Date
EP0783238A2 true EP0783238A2 (fr) 1997-07-09
EP0783238A3 EP0783238A3 (fr) 1998-07-01

Family

ID=11357108

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96830629A Withdrawn EP0783238A3 (fr) 1995-12-22 1996-12-17 Méthode pour la production et l'application de bords à suspension annulaire pour diaphragmes de haut-parleurs

Country Status (7)

Country Link
EP (1) EP0783238A3 (fr)
AR (1) AR005184A1 (fr)
BR (1) BR9606142A (fr)
CZ (1) CZ373896A3 (fr)
HU (1) HUP9603491A3 (fr)
IT (1) IT1281924B1 (fr)
PL (1) PL317603A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1059829A2 (fr) * 1999-06-08 2000-12-13 Harman Audio Electronic Systems GmbH Haut-parleur avec un joint d'étanchéité monté par l'avant et procédé de fabrication d'un tel haut-parleur
US7450727B2 (en) 2002-05-03 2008-11-11 Harman International Industries, Incorporated Multichannel downmixing device
US7876923B2 (en) 2006-02-27 2011-01-25 Finnegan Brendan J Loudspeaker gasketing
US8638975B2 (en) 2011-08-17 2014-01-28 Bose Corporation Wiper seal for passive radiator

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57131198A (en) * 1981-02-05 1982-08-13 Matsushita Electric Ind Co Ltd Manufacture of diaphragm for loudspeaker
US5319718A (en) * 1991-10-11 1994-06-07 Yocum Fred D Loudspeaker cone and method for making same
ATE132681T1 (de) * 1992-01-15 1996-01-15 Patrick Arthur Leach Verfahren und vorrichtung zur herstellung eines lautsprecherkonus und einer sickenanordnung
JPH0715793A (ja) * 1993-06-28 1995-01-17 Sony Corp スピーカ用振動板及びその成形方法
JP3246183B2 (ja) * 1993-10-14 2002-01-15 ソニー株式会社 スピーカ用振動部材及びその製造方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1059829A2 (fr) * 1999-06-08 2000-12-13 Harman Audio Electronic Systems GmbH Haut-parleur avec un joint d'étanchéité monté par l'avant et procédé de fabrication d'un tel haut-parleur
EP1059829A3 (fr) * 1999-06-08 2003-04-02 Harman Audio Electronic Systems GmbH Haut-parleur avec un joint d'étanchéité monté par l'avant et procédé de fabrication d'un tel haut-parleur
US6661902B1 (en) 1999-06-08 2003-12-09 Harman Audio Electronic Systems Gmbh Loudspeaker with a front-mounted sealing element and method of manufacturing the same
US7450727B2 (en) 2002-05-03 2008-11-11 Harman International Industries, Incorporated Multichannel downmixing device
US8363855B2 (en) 2002-05-03 2013-01-29 Harman International Industries, Inc. Multichannel downmixing device
US7876923B2 (en) 2006-02-27 2011-01-25 Finnegan Brendan J Loudspeaker gasketing
US8638975B2 (en) 2011-08-17 2014-01-28 Bose Corporation Wiper seal for passive radiator

Also Published As

Publication number Publication date
HUP9603491A2 (en) 1997-07-28
IT1281924B1 (it) 1998-03-03
HU9603491D0 (en) 1997-02-28
AR005184A1 (es) 1999-04-14
BR9606142A (pt) 1998-11-03
HUP9603491A3 (en) 1998-10-28
CZ373896A3 (en) 1997-07-16
EP0783238A3 (fr) 1998-07-01
PL317603A1 (en) 1997-06-23
ITMC950134A0 (fr) 1995-12-22
ITMC950134A1 (it) 1997-06-22

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