EP0615398B1 - Transconducteur électroacoustique avec un masque - Google Patents

Transconducteur électroacoustique avec un masque Download PDF

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Publication number
EP0615398B1
EP0615398B1 EP94200416A EP94200416A EP0615398B1 EP 0615398 B1 EP0615398 B1 EP 0615398B1 EP 94200416 A EP94200416 A EP 94200416A EP 94200416 A EP94200416 A EP 94200416A EP 0615398 B1 EP0615398 B1 EP 0615398B1
Authority
EP
European Patent Office
Prior art keywords
mask
transducer
partition
openings
cross
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.)
Expired - Lifetime
Application number
EP94200416A
Other languages
German (de)
English (en)
Other versions
EP0615398A1 (fr
Inventor
Peter Bleim
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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 Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Publication of EP0615398A1 publication Critical patent/EP0615398A1/fr
Application granted granted Critical
Publication of EP0615398B1 publication Critical patent/EP0615398B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit

Definitions

  • the invention relates to an electroacoustic transducer a membrane that is designed to vibrate parallel to a transducer axis, and with a partition that is opposite the membrane rear and essentially runs transversely to the transducer axis and in the at least one penetrating it Wall opening to form a connection between one between the membrane and one side of the partition, the first room and one on the other Side of the partition lying second room is provided, and with a mask that is arranged adjacent to one of the two sides of the partition and in the at least one mask opening penetrating them to form the connection between the two rooms is provided, whereby to achieve different sizes acoustically effective cross-sectional areas of the connection between the two rooms, which at least partially overlap in the direction of the transducer axis bringable openings are formed in the partition and in the mask, the partition and the mask rotated in at least two with respect to the transducer axis Relative positions can be brought and held, and with a magnet system that has at least one magnet system part.
  • An electroacoustic transducer according to that in the first paragraph above cited genus is known for example from US-A 4 027 116.
  • the mask is formed by an annular disc on the the cylindrical outer peripheral surface of a cup-shaped magnet system part of the Magnet system of the transducer is pushed on and also on an annular Partition provided as a holder for the membrane and the magnet system Frame of the converter rests and by rotating it around the converter axis coaxial pot-shaped magnet system part in three different relative positions can be brought opposite the partition.
  • the known converter that is as an annular Disk-formed mask formed by a separate component, which as additional component represents an additional effort and its assembly additional Assembly steps and assembly costs required. Through the additional component additional tolerance influences are also caused, which adversely affect the Reproducibility of the acoustic behavior of the transducer affect.
  • the invention has set itself the task of a converter in the first Paragraph cited in his training to simplify both the genus To reduce manufacturing costs, which is particularly the case with mass production of a such transducer is important, as well as to improve to adverse tolerance effects on the reproducibility of the acoustic behavior of the transducer turn off.
  • the invention is characterized in that the magnet system part of the magnet system is essentially transverse to the transducer axis Has flange and that the flange of the magnet system part with at least one Mask provided mask of the converter forms.
  • the mask of a converter according to the invention not through a separate component, but through a component of an already existing component of such Converter is formed, which in terms of low component costs and in particular with regard to the fewest possible assembly steps and the lowest possible assembly costs is an advantage.
  • the latter advantages are particularly important in mass production of great importance, because with a simple assembly line, Aus Siemens is found. Since the mask in a converter according to the invention a component of a component of the transducer is formed by the mask causes no additional tolerance influences, which means good reproducibility the acoustic behavior of the transducer is advantageous.
  • the partition and the mask can be in such positions relative to each other be feasible that a connection in each relative position using the two openings between the two rooms with a double-convex effective cross-sectional area is formed, the surface area and therefore acoustic inductance and friction depending on Relative positions are of different sizes and therefore have different frequency characteristics lead of the transducer, but then the effective cross-sectional areas and consequently, the frequency characteristics of position tolerances between the Partition and the mask are dependent.
  • each opening with a smaller one Cross-sectional area has a circular cross-section and the diameter of each such opening with a circular cross section in its acoustically effective Cross-sectional area is less than 0.3 mm.
  • Such openings or holes with small Diameters are very accurate in compliance with specified dimensions very small tolerances can be produced, so that precisely defined openings of this type by the ratio of the acoustically effective cross-sectional area and length of the opening certain acoustic inductance values and resistance values and thus exactly defined influences of the connections formed with the help of the openings between the both rooms of the transducer can be achieved on the acoustic behavior of the transducer.
  • each such Opening with a circular cross section in its axial direction, parallel to the transducer axis, a conical Training.
  • This is accurate in terms of one Defined definition of the acoustically effective cross-sectional area of such an opening advantageous, which focuses on the area of the smallest diameter of the opening is. Furthermore, this is in view of the good manufacturability of such an opening in a plastic part advantageous, because of the easy release.
  • FIG. 1 shows in a cross section along the line I-I in Fig. 2 on a larger scale compared to the natural size in a somewhat schematic Way an electrodynamic converter according to a first embodiment the invention, in which a mask of the transducer against a partition of the Converter takes a first relative position.
  • Fig. 2 shows in a section according to the Line II-II in FIG. 1 shows the converter according to FIG. 1.
  • FIG. 3 shows in an analogous manner how Fig. 1 in a cross section along the line III-III in Fig. 4 is an electrodynamic Converter according to a second embodiment of the invention, which in has essentially the same structure as the converter of FIG.
  • FIG. 4 shows a section along the line IV-IV in FIG. 3 the converter according to FIG. 3.
  • FIG. 5 shows a cross section in one opposite Figures 1 and 3 larger scale a detail of an electrodynamic Converter according to a third embodiment of the invention, which is essentially has the same structure as the converter according to Figures 3 and 4, but in its partition has conical wall openings.
  • the converter 1 has an essentially circular or hollow-cylindrical holding device 2.
  • the holding device 2 has one circular outer wall 3, which in its one front of the transducer 1st facing area is provided with a gradation 4.
  • the gradation 4 forms one Holding zone on which a membrane 5 of the transducer 1 by means of an adhesive connection is attached.
  • the membrane 5 has a central area (middle area) 6, which is often also as Cathedral is called.
  • the membrane 5 has a peripheral edge region 7 on, in which hyperbolic beads are provided, which is not the case in FIG. 1 is recognizable.
  • the membrane 5 With the free end 8 of the edge region 7, the membrane 5 is on the Gradation 4 of the holding device 2 attached by gluing.
  • the membrane 5 is parallel to a transducer axis 9 back and forth designed to vibrate and they radiates audible useful vibrations on the membrane front side 10 during operation.
  • a voice coil 12 In the transition area 11 between the middle area 6 and the The edge region 7 of the membrane 5 is a voice coil 12 by means of the membrane 5 an adhesive bond connected.
  • the voice coil 12 projects here with its from the Area 14 facing away from membrane rear side 13 into an air gap 15 of a magnet system 16 of the transducer 1.
  • the magnet system 16 has a magnet 17 and one Pole plate 18 and a pot 19, which is often referred to as an outer pot.
  • the holding device 2 has one of the outer wall 3 to protrude inward in radial directions, substantially circular partition 24, which in this case the membrane rear 13 of the Diaphragm 5 is opposite and extends transversely to the transducer axis 9.
  • the partition 24 is with four evenly spaced 90 ° to each other, the partition 24 penetrating, essentially having a slit-shaped cross-sectional area Wall openings 25, 26, 27 and 28 provided.
  • the partition 24 is four each offset by 90 ° to each other and 45 ° to the slot-shaped wall openings 25, 26, 27 and 28 arranged at an angle, likewise the partition 24 penetrating wall openings 29 having a circular cross-sectional area, 30, 31 and 32 provided.
  • the wall openings 25, 26, 27, 28 and 29, 30, 31, 32 are to form connections between one between the membrane 5 and the one Page 33 of the partition 24 lying room 34 and one on the other side 35 of the Partition 24 lying room 36 is provided.
  • the room 36 for The rear of the converter 1 is open.
  • the slit-shaped Wall openings 25, 26, 27 and 28 have a length of about 6 mm.
  • the circular wall openings 29, 30, 31 and 32 have a diameter of less than 0.3 mm and preferably of 0.2 mm.
  • the circular wall openings can also have a diameter of, for example have only 50 or 40 ⁇ m.
  • the present converter 1 according to the Figures 1 and 2 have the circular wall openings 29, 30, 31 and 32 in their axial direction on a cylindrical formation.
  • the converter 1 also has one on the side 35 of the partition 24 adjacently arranged and in this case in contact with the partition 24 mask (flange) 37.
  • the mask 37 is arranged with four, each offset by 90 ° to each other Passing mask 37, having a slit-shaped cross-sectional area
  • Mask openings 38, 39, 40 and 41 provided to form the connections are provided between the two rooms 34 and 36.
  • the slit-shaped mask openings 38, 39, 40 and 41 a length of about 5 mm and have a width of about 2.2 mm.
  • the converter 1 has the Pot 19 of the magnet system 16 has a flange 37 running transversely to the transducer axis 9 with which the pot 19 for fastening the entire magnet system 16 to the Partition 24 is glued, namely along a self-contained, in essentially circular, located in the outer region of the flange 37
  • Adhesive connection 42 the inner boundary 43 in Fig. 2 with a dash-dotted line Line is indicated schematically.
  • Such an adhesive connection 42 has in practice of course, a limit 43 that does not have such an exactly circular Has course.
  • the flange 37 of the pot 19 of the magnet system 16 not only forms a fastening part for fastening the magnet system 16 to the holding device 2, but also in a particularly simple and very advantageous manner Mask 37 of the converter 1.
  • the mask 37 of the converter 1 not by a separate component, but by a component of one anyway existing component of the converter 1, namely through the flange 37 of the Pot 19 of the magnet system 16 of the transducer 1 is formed.
  • This is regarding lower component costs and especially with regard to the fewest possible assembly steps and the lowest possible installation costs are an advantage.
  • Assembly steps and assembly costs are such in mass production electrodynamic converter 1 of great importance because it makes it easier built assembly line the Ausmaschine is found.
  • Flange of the pot formed mask causes no additional tolerance influences, what about good reproducibility of the acoustic behavior of the transducer 1 is advantageous.
  • FIGS. 3 and 4 An electrodynamic converter 1 is shown in FIGS shown a second embodiment of the invention, which as a hearing or Speech capsule for telecommunications applications, in particular telephony applications, is trained.
  • the converter 1 according to FIGS. 3 and 4 essentially has the same structure as the converter 1 according to Figures 1 and 2. Differently compared to the converter 1 according to FIGS. 1 and 2, the converter 1 according to FIGS 3 and 4, however, that the space 36 on the other side 35 of the partition 24th is completed.
  • a closing part 44 is provided for closing off the room 36, which is plate-shaped.
  • the end part 44 has an opening 45 provided, which in the present case has a circular cross section and with which the end part 44 with an acoustically tight fit on the outer peripheral surface 46 of the pot 19 of the magnet system 16 is placed.
  • the end part 44 has an edge region 47 surrounding the opening 45, with which the end part 44 with the outer wall 3 of the holding device 2 acoustically tight and mechanically firm connected is.
  • the holding device 2 or its outer wall 3 thus forms the present converter 1 a space boundary part for delimiting space 36.
  • the holding device 2 and the end part 44 consist of the same Plastic material and are mechanically strong thanks to an ultrasonic welding connection connected with each other.
  • the end part 44 is open particularly simple way only by means of a mechanical press fit with the pot 19 of the Magnet system 16 connected to its outer peripheral surface 46.
  • the partition wall 24 and the mask 37 have a different relative position to one another than is the case with the converter 1 according to FIGS. 1 and 2 is the case.
  • the converter 1 according to FIGS. 3 and 4 take the partition 24 and the mask 37, ie the flange 37 of the pot 19th of the magnet system 16, a relative position to one another in which the circular Wall openings 29, 30, 31 and 32 with the slit-shaped mask openings 38, 39, 40 and cover 41.
  • the mask 37 of the converter 1 is also by a component of an existing component of such a transducer, which - as already mentioned - with regard to low component costs and in particular with regard to as few assembly steps as possible and as low as possible assembly costs and one good reproducibility of the acoustic behavior of such a transducer is an advantage is.
  • FIG. 5 shows a detail of an electrodynamic converter 1 according to FIG a third embodiment of the invention shown, as well as the Transducer 1 according to FIGS. 3 and 4 as a hearing or speaking capsule for telecommunication applications is trained.
  • each has Opening 29, 30, 31 and 32 with a circular cross-section, of which in Fig. 5th only the opening 30 is shown, in its axial direction a conical configuration on.
  • This is in terms of a precisely defined definition of the acoustically effective Cross-sectional area of such an opening advantageous to the area of the smallest
  • the diameter of the opening is concentrated, that is, in the present case, the converter 1 5 to the end region of the openings 29 facing away from the mask 37, 30, 31 and 32.
  • the invention is based on the three transducers described above Embodiments not limited.
  • it can be used as a mask provided flange of the pot of one of the three transducers described provided core pot magnet system also on the side facing the membrane abut a partition of such a holding device.
  • Another can also Magnet system as a pot core magnet system in a transducer according to the invention are used, for example a toroidal magnet system.
  • in the partition more than two different types of wall openings be provided with, for example, more than one type of mask openings in a mask formed by a flange in different relative positions the partition and the mask can be brought to cover each other.
  • Also instead of in one area of the partition, only one opening with a circular To provide a cross section with a small diameter, including two or more Openings with a circular cross section with even smaller diameters are provided be.

Claims (7)

  1. Transducteur électroacoustique (1) avec une membrane (5) qui est conçue pour pouvoir osciller parallèlement à un axe du transducteur (9) et avec une paroi de séparation (24) qui est opposée à la face postérieure de la membrane (13) et s'étend de manière essentiellement transversale par rapport à l'axe du transducteur (9) et dans lequel il est prévu au moins un orifice de paroi qui la traverse (25, 26, 27, 28, 29, 30, 31, 32) pour la formation d'une jonction entre un premier espace (34) situé entre la membrane (5) et l'un des côtés (33) de la paroi de séparation (24) et un deuxième espace (36) situé de l'autre côté (35) de la paroi de séparation (24) et avec un masque (37) qui est disposé contre l'un des deux côtés (33, 35) de la paroi de séparation (24) et dans lequel il est prévu au moins un orifice de masque le (38, 39, 40, 41) traversant en vue de la formation de la jonction entre les deux espaces (34, 36), la paroi de séparation (24) et le masque (37) pouvant être amenés et fixés dans au moins deux positions relatives à rotation réciproque par rapport à l'axe du transducteur (9) en vue de parvenir à des surfaces de section acoustiquement actives de grandeur variable de la jonction entre les deux espaces (34, 36) qui sont formés par des orifices (25, 26, 27, 28, 29, 30, 31, 32, 38, 39, 40, 41) dans la paroi de séparation (24) et dans le masque (37) pouvant se chevaucher, du moins en partie, dans la direction de l'axe du transducteur (9) et avec un système magnétique qui présente au moins une pièce de système magnétique (16), caractérisé en ce que la pièce de système magnétique (19) du système magnétique (16) présente une collerette (37) s'étendant de manière essentiellement perpendiculaire à l'axe du transducteur (9) et que la collerette (37) de la pièce de système magnétique (19) forme le masque (37) du transducteur (1) doté d'au moins un orifice de masque (38, 39, 40, 41).
  2. Transducteur selon la revendication 1, caractérisé en ce qu'au moins deux des orifices de paroi (25, 26, 27, 28, 29, 30, 31, 32) traversant la paroi de séparation (24) sont différents quant à leur surface de section et qu'un des orifices de masque (38, 39, 40, 41) prévus dans la collerette (37) chevauche dans l'une des positions relatives l'un des différents orifices de paroi (25, 26, 27, 28) en vue de la formation d'une jonction entre les deux espaces (34, 36) et dans l'autre position relative l'autre des différents orifices de paroi (29, 30, 31, 32) pour la formation d'une autre jonction entre les deux espaces (34, 36).
  3. Transducteur selon la revendication 1, caractérisé en ce qu'au moins deux des orifices de masque dans la collerette (37) sont différents sur le plan de leur surface de section et qu'un des orifices de paroi prévus dans la paroi de séparation (24) chevauche dans l'une des positions relatives l'un des différents orifices de masque en vue de la formation d'une jonction entre les deux espaces (34, 36) et dans l'autre position relative, l'autre des différents orifices de masque pour la formation d'une autre jonction entre les deux espaces (34, 36).
  4. Transducteur selon la revendication 2, caractérisé en ce que chaque orifice (29, 30, 31, 32) présentant une surface de section inférieure possède une section circulaire par les orifices de paroi précités de la paroi de séparation (25, 26, 27, 28, 29, 30, 31, 32) avec des surfaces de section différentes et que le diamètre de chacun de ces orifices (29, 30, 31, 32) avec une section circulaire est inférieur à 0,3 mm dans sa zone de section acoustiquement active.
  5. Transducteur selon la revendication 3, caractérisé en ce que, parmi les orifices de masque précités possédant différentes surfaces de section, chaque orifice avec une surface de section inférieure possède une section circulaire et que le diamètre de chaque orifice de section circulaire est inférieur à 0,3 mm dans sa zone de section acoustiquement active.
  6. Transducteur selon l'une des revendications 4 ou 5, caractérisé en ce que le diamètre de chaque orifice d'une section circulaire est égal à 0,2 mm dans sa zone de section acoustiquement active.
  7. Transducteur selon l'une des revendications 4, 5 ou 6, caractérisé en ce que chaque orifice présentant une section circulaire possède une forme conique dans sa direction axiale parallèle à l'axe du transducteur (9).
EP94200416A 1993-02-26 1994-02-18 Transconducteur électroacoustique avec un masque Expired - Lifetime EP0615398B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0036793A AT398354B (de) 1993-02-26 1993-02-26 Elektroakustischer wandler mit einer maske
AT367/93 1993-02-26

Publications (2)

Publication Number Publication Date
EP0615398A1 EP0615398A1 (fr) 1994-09-14
EP0615398B1 true EP0615398B1 (fr) 1998-05-13

Family

ID=3488717

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94200416A Expired - Lifetime EP0615398B1 (fr) 1993-02-26 1994-02-18 Transconducteur électroacoustique avec un masque

Country Status (7)

Country Link
US (1) US5524151A (fr)
EP (1) EP0615398B1 (fr)
JP (1) JP3194664B2 (fr)
AT (1) AT398354B (fr)
DE (1) DE59405929D1 (fr)
MY (1) MY109825A (fr)
SG (1) SG43981A1 (fr)

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AT398355B (de) * 1993-02-26 1994-11-25 Koninkl Philips Electronics Nv Elektroakustischer wandler mit einem abschlussteil
US5802191A (en) * 1995-01-06 1998-09-01 Guenther; Godehard A. Loudspeakers, systems, and components thereof
WO1998038834A1 (fr) * 1997-02-28 1998-09-03 Koninklijke Philips Electronics N.V. Transducteur electroacoustique comportant un element obturateur pour fermer son volume arriere
JP2002516542A (ja) * 1998-05-15 2002-06-04 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ オンイヤモード及びオフイヤモード動作装置
AU1624700A (en) * 1998-11-13 2000-06-05 Godehard A. Guenther Low cost motor design for rare-earth-magnet loudspeakers
US8588457B2 (en) * 1999-08-13 2013-11-19 Dr. G Licensing, Llc Low cost motor design for rare-earth-magnet loudspeakers
WO2001013677A1 (fr) 1999-08-13 2001-02-22 Guenther Godehard A Haut-parleur longue portee de faible cout et systeme
US6611606B2 (en) * 2000-06-27 2003-08-26 Godehard A. Guenther Compact high performance speaker
AU2001270247A1 (en) * 2000-06-27 2002-01-08 Godehard A. Guenther Low profile speaker and system
US6993147B2 (en) * 2000-08-14 2006-01-31 Guenther Godehard A Low cost broad range loudspeaker and system
JP4337078B2 (ja) * 2001-04-23 2009-09-30 日本電気株式会社 スピーカ装置
JP3874183B2 (ja) * 2002-05-21 2007-01-31 フォスター電機株式会社 電気音響変換器用振動板
JP2004096670A (ja) * 2002-09-04 2004-03-25 Matsushita Electric Ind Co Ltd スピーカ
EP1790192A4 (fr) 2004-09-09 2010-06-02 Godehard A Guenther Haut-parleurs et systemes
US8189840B2 (en) 2007-05-23 2012-05-29 Soundmatters International, Inc. Loudspeaker and electronic devices incorporating same
US8418967B2 (en) 2008-02-21 2013-04-16 Cornerstone Research Group, Inc. Passive adaptive structures
DE202014003034U1 (de) * 2014-04-02 2015-04-07 Harman Becker Automotive Systems Gmbh Lautsprecher
DE102017119865A1 (de) * 2016-09-07 2018-03-08 Sennheiser Electronic Gmbh & Co. Kg Elektrodynamischer Schallwandler und Verfahren zum Herstellen eines elektrodynamischen Schallwandlers

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US2252846A (en) * 1938-09-30 1941-08-19 Associated Electric Lab Inc Acoustic device
JPS5156618A (en) * 1974-11-13 1976-05-18 Yukimatsu Nakamura Supiika
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AT400911B (de) * 1993-03-04 1996-04-25 Koninkl Philips Electronics Nv Elektroakustischer wandler mit einer trennwand und einer maskenwand

Also Published As

Publication number Publication date
JP3194664B2 (ja) 2001-07-30
AT398354B (de) 1994-11-25
MY109825A (en) 1997-08-30
DE59405929D1 (de) 1998-06-18
ATA36793A (de) 1994-03-15
SG43981A1 (en) 1997-11-14
EP0615398A1 (fr) 1994-09-14
US5524151A (en) 1996-06-04
JPH06269088A (ja) 1994-09-22

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