EP0023007B1 - Method of making an electrodynamic transducer - Google Patents

Method of making an electrodynamic transducer Download PDF

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Publication number
EP0023007B1
EP0023007B1 EP80104067A EP80104067A EP0023007B1 EP 0023007 B1 EP0023007 B1 EP 0023007B1 EP 80104067 A EP80104067 A EP 80104067A EP 80104067 A EP80104067 A EP 80104067A EP 0023007 B1 EP0023007 B1 EP 0023007B1
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EP
European Patent Office
Prior art keywords
membrane
assembly case
connecting wires
coil
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.)
Expired
Application number
EP80104067A
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German (de)
French (fr)
Other versions
EP0023007A1 (en
Inventor
Hans Ing.Grad. Maul
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.)
Tenovis GmbH and Co KG
Original Assignee
Telefonbau und Normalzeit GmbH
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Filing date
Publication date
Application filed by Telefonbau und Normalzeit GmbH filed Critical Telefonbau und Normalzeit GmbH
Priority to AT80104067T priority Critical patent/ATE2042T1/en
Publication of EP0023007A1 publication Critical patent/EP0023007A1/en
Application granted granted Critical
Publication of EP0023007B1 publication Critical patent/EP0023007B1/en
Expired legal-status Critical Current

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    • 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
    • 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
    • H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension

Definitions

  • the invention relates to a method for producing an electrodynamic transducer, consisting of a body for receiving a permanent magnet system and the membrane with a voice coil, which can be inserted into a housing that can be closed with a lid, the housing and / or the body on the underside thereof Electrical amplifier circuit with electrical pins and the body is provided with two parallel slots for receiving the lead wires of the voice coil, the spacing of which corresponds to the diameter thereof, the two lead wires of the voice coil in parallel at a distance corresponding to the diameter thereof on a support at one point are attached at a certain distance outside the membrane and when installing the membrane in the body, the two connecting wires below the membrane are led to the outside of the body.
  • EP-A1 22544 describes an electrodynamic transducer which has a body which is provided with two parallel slots at a distance from the outer diameter of the voice coil attached to the membrane for receiving the lead wires of the voice coil in order to connect them to the underside of the body to lead existing amplifier circuit.
  • the continuous production of membranes from an endless band by step-wise shaping is described in FR-OS 21 51 047.
  • the material from which the membrane is formed consists of an electrically non-conductive material.
  • the tape is provided in its longitudinal direction with two parallel conductor tracks, which are spaced apart from the outside diameter the voice coil is attached to the tape material on the top or bottom.
  • the object is achieved in that the lead wires are guided with the aid of the carrier, that the carrier is formed by the amplifier circuit, which is guided and punched out in parallel with a strip from which the membrane is formed, that the lead wires with the Connection pins are connected so that the connecting wires are inserted into the slots of the body, then the membrane is inserted and then the amplifier circuit is attached to the underside of the body.
  • the carrier is formed by the amplifier circuit, which is guided and punched out in parallel with a strip from which the membrane is formed
  • the lead wires with the Connection pins are connected so that the connecting wires are inserted into the slots of the body, then the membrane is inserted and then the amplifier circuit is attached to the underside of the body.
  • An advantageous development of the invention also consists in the fact that the carrier is formed by the tape from which the membrane is formed, that the membrane and the carrier are partially punched out, and that after the voice coil has been fastened to the membrane, the connecting wires are fastened to the carrier the membrane and the carrier are punched out. If the band material from which the membrane is drawn is chosen to be sufficiently wide, the carrier can be produced from the same band. The specified wire length between the voice coil and the carrier is clearly defined. Further advantages result from the exemplary embodiments.
  • Fig. Shows the individual operations for producing a membrane.
  • the transport holes 9 are first punched into the band-shaped material 7, these serve both for the movement of the band 7 and for exact positioning.
  • Process step A relates to the shaping of the membrane 5 by, for example, deep drawing.
  • method step B the surfaces 10 are punched out, using the membrane and the carrier continues to be held in the band by the left webs 11.
  • the voice coil 2 is inserted and glued into the diaphragm 5 in method step C, the two connecting wires 1 of the voice coil 2 are also fastened to the points 3 on the carrier 3. This is done at a distance from the outer diameter of the voice coil.
  • the last process step involves punching membrane 5 and carrier 3 free by removing the webs 11. The membrane can now be inserted into the body.
  • Fig. Shows the use of the amplifier circuit 24 as a carrier, on the pins 23, the two connecting wires 1 of the voice coil are attached during step C.
  • the amplifier circuit 24 can now be moved and punched out in parallel on a special carrier tape with the tape material. It only has to be ensured that the amplifier circuit 24 is moved in parallel with the connected voice coil until punching free (method step D).
  • FIG. 5 shows the cross section of a complete electrodynamic converter, an amplifier circuit 24 being attached to the underside of the body 20.
  • the two connecting wires 1 are inserted into the slots 21 with the aid of the carrier and guided to the amplifier circuit 24 on the underside of the body 20 to the connecting pins, where one wire is wound around a connecting pin. With the help of the carrier, this can be done simultaneously with both connecting pins.
  • the protruding wire ends are then cut off on the carrier. If the voice coil 2 of the membrane 5 is already connected to the amplifier circuit 24 as shown in FIG. 3, the membrane 5 is inserted into the body, the two connecting wires are guided through the amplifier circuit 24, inserted into the two slots 21 and then the Amplifier circuit 24 attached to the underside of the body 20.

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

Abstract

1. A method for the manufacture of an electrodynamic transducer consisting of an assembly case (20) for holding the permanent magnet system and the membrane (5) with coil (2), said assembly case (20) is insertable into a housing, whereby said housing and/or the assembly case (20) is provided at its bottom side with an electric amplifier circuit (24) having terminal pins (23), said assembly case (20) is furnished with two parallel slits (21) for holding the connecting wires (1) of the coil (2), whereby the distance of said slits (21) corresponds with the diameter of the coil (2), both connecting wires (1) of the coil (2) are fixed in parallel in the distance of the coil diameter each at a point on a support in a certain distance outside of said membrane (5) and both connecting wires (1) are lead below the membrane (5) to the bottom side of the assembly case (20) when the membrane (5) is mounted in the assembly case (20), said method comprising that the leading of the connecting wires (1) is performed by use of the support and said support is formed by the amplifier circuit (24), which is transported and punched out in parallel to the band (7) from which the membrane (5) is formed, that the connecting wires (1) are inserted in the slits (21) of the assembly case (20), then the membrane (5) is inserted and finally the amplifier circuit (24) is mounted on the bottom side of the assembly case (20).

Description

Die Erfindung betrifft ein Verfahren zur Herstellung eines elektrodynamischen Wandlers, bestehend aus einem Aufbaukörper zur Aufnahme eines Permanentmagnet-Systems und der Membrane mit Schwingspule, welcher in ein mit einem Deckel verschließbares Gehäuse einsetzbar ist, wobei das Gehäuse und/oder der Aufbaukörper an seiner Unterseite eine elektrische Verstärkerschaltung mit elektrischen Anschlußstiften aufweist und der Aufbaukörper mit zwei parallelen Schlitzen zur Aufnahme der Anschlußdrähte der Schwingspule versehen ist, wobei deren Abstand dem Durchmesser derselben entspricht, die beiden Anschlußdrähte der Schwingspule parallel in einem dem Durchmesser derselben entsprechenden Abstand auf einem Träger an jeweils einem Punkt in einer bestimmten Entfernung außerhalb der Membrane befestigt werden und bei Einbau der Membrane in den Aufbaukörper die beiden Anschlußdrähte unterhalb der Membrane nach der Außenseite des Aufbaukörpers geführt werden.The invention relates to a method for producing an electrodynamic transducer, consisting of a body for receiving a permanent magnet system and the membrane with a voice coil, which can be inserted into a housing that can be closed with a lid, the housing and / or the body on the underside thereof Electrical amplifier circuit with electrical pins and the body is provided with two parallel slots for receiving the lead wires of the voice coil, the spacing of which corresponds to the diameter thereof, the two lead wires of the voice coil in parallel at a distance corresponding to the diameter thereof on a support at one point are attached at a certain distance outside the membrane and when installing the membrane in the body, the two connecting wires below the membrane are led to the outside of the body.

Ein derartiger elektrodynamischer Wandler ist bereits bekannt. So wird in der EP-A1 22544 ein elektrodynamischer Wandler beschrieben, welcher einen Aufbaukörper aufweist, welcher mit zwei parallelen Schlitzen im Abstand des Außendurchmessers der an der Membraneebefestigten Schwingspule zur Aufnahme der Anschlußdrähte des Schwingspule versehen ist, um diese zu der an der Unterseite des Aufbaukörpers befindlichen Verstärkerschaltung zu führen.Such an electrodynamic converter is already known. For example, EP-A1 22544 describes an electrodynamic transducer which has a body which is provided with two parallel slots at a distance from the outer diameter of the voice coil attached to the membrane for receiving the lead wires of the voice coil in order to connect them to the underside of the body to lead existing amplifier circuit.

Die fortlaufende Herstellung von Membranen aus einem endlosen Band durch schrittweises Verformen ist in der FR-OS 21 51 047 beschrieben. Das Material, aus welchem die Membrane geformt wird, besteht hierbei aus einem elektrisch-nichtleitenden Material. Zur elektrischen Verbindung der Anschlüsse der Schwingspule, welche bekanntlich auf dem beweglichen Teil der Membrane sitzt, mit dem äußeren Rand der Membrane, welcher zur Befestigung der Membrane verwendet wird, ist das Band in seiner Längsrichtung mit zwei parallelen Leiterbahnen versehen, welche im Abstand des Außendurchmessers der Schwingspule auf dem Bandmaterial auf der Ober- oder Unterseite angebracht sind. Diese Lösung ermöglicht zwar den elektrischen Anschluß der Schwingspule am äußeren Rand der Membrane, Hinweise auf die elektrische Verbindung mit einer dazugehörigen Verstärkerschaltung lassen sich dieser Druckschrift nicht entnehmen. Die Aufgabe der vorliegenden Erfindung besteht nun darin, ein Verfahren anzugeben, welches zur fertigungsfreundlichen und schnellen Herstellung eines elektrodynamischen Wandlers die Führung der Anschlußdrähte der Schwingspule verbessert und deren elektrischer Anschluß an die Anschlußstifte der Verstärkerschattung erleichtert.The continuous production of membranes from an endless band by step-wise shaping is described in FR-OS 21 51 047. The material from which the membrane is formed consists of an electrically non-conductive material. For the electrical connection of the connections of the voice coil, which is known to sit on the movable part of the diaphragm, with the outer edge of the diaphragm, which is used to fasten the diaphragm, the tape is provided in its longitudinal direction with two parallel conductor tracks, which are spaced apart from the outside diameter the voice coil is attached to the tape material on the top or bottom. Although this solution enables the electrical connection of the voice coil on the outer edge of the membrane, references to the electrical connection with an associated amplifier circuit cannot be found in this document. The object of the present invention is now to provide a method which improves the guidance of the connecting wires of the voice coil and facilitates their electrical connection to the connecting pins of the amplifier shade for the production-friendly and quick production of an electrodynamic converter.

Erfindungsgemäß wird die Aufgabe dadurch gelöst, daß das Führen der Anschlußdrähte mit Hilfe des Trägers erfolgt, daß der Träger durch die Verstärkerschaltung gebildet wird, die parallel zu einem Band, aus welchem die Membrane geformt wird, geführt und ausgestanzt wird, daß die Anschlußdrähte mit den Anschlußstiften verbunden werden, daß die Anschlußdrähte in die Schlitze des Aufbaukörpers eingelegt werden, sodann die Membrane eingesetzt wird und anschließend die Befestigung der Verstärkerschaltung an der Unterseite des Aufbaukörpers erfolgt. Auf diese Weise läßt sich ein weiterer Arbeitsgang einsparen, indem mit Hilfe der Verstärkerschaltung die beiden Drähte, welche ohnehin mit dieser zu verbinden sind, während der Montage geführt werden. Eine vorteilhafte Weiterbildung der Erfindung besteht auch darin, daß der Träger durch das Band gebildet wird, aus welchem die Membrane geformt wird, daß die Membrane und der Träger teilweise ausgestanzt werden und daß nach Befestigung der Schwingspule auf der Membrane die Befestigung der Anschlußdrähte auf dem Träger die Membrane und der Träger freigestanzt werden. Wird das Bandmaterial, aus welchem die Membrane gezogen wird, entsprechend breit gewählt, so kann der Träger aus dem gleichen Band hergestellt werden. Die vorgegebene Drahtlänge zwischen der Schwingspule und dem Träger ist eindeutig festgelegt. Weitere Vorteile ergeben sich aus den Ausführungsbeispielen.According to the invention the object is achieved in that the lead wires are guided with the aid of the carrier, that the carrier is formed by the amplifier circuit, which is guided and punched out in parallel with a strip from which the membrane is formed, that the lead wires with the Connection pins are connected so that the connecting wires are inserted into the slots of the body, then the membrane is inserted and then the amplifier circuit is attached to the underside of the body. In this way, a further work step can be saved by using the amplifier circuit to guide the two wires, which are to be connected to it anyway, during assembly. An advantageous development of the invention also consists in the fact that the carrier is formed by the tape from which the membrane is formed, that the membrane and the carrier are partially punched out, and that after the voice coil has been fastened to the membrane, the connecting wires are fastened to the carrier the membrane and the carrier are punched out. If the band material from which the membrane is drawn is chosen to be sufficiently wide, the carrier can be produced from the same band. The specified wire length between the voice coil and the carrier is clearly defined. Further advantages result from the exemplary embodiments.

Die Erfindung wird nun anhand von Ausführungsbeispielen näher erläutert, welche in der Zeichnung dargestellt sind.The invention will now be explained in more detail with reference to exemplary embodiments which are shown in the drawing.

Es zeigt

  • Figur 1 eine Darstellung der einzelnen Verfahrensschritte zur Herstellung einer Membrane, wobei Membrane und Träger aus dem gleichen Bandmaterial bestehen,
  • Figur 2 eine Darstellung der einzelnen Vorgänge zur Herstellung einer Membrane, wobei Membrane und Träger aus dem gleichen Bandmaterial bestehen,
  • Figur 3 eine Darstellung der einzelnen Vorgänge zur Herstellung einer Membrane, wobei ein besonderes Trägerband verwendet wird,
  • Figur4 die Benutzung der Verstärkerschaltung als Träger,
  • Figur 5 einen Schnitt durch den Aufbaukörper und die Führung der Anschlußdrähte,
  • Figur 6 einen Schnitt durch einen vollständigen Wandler und
  • Figur 7 eine Draufsicht auf einen Aufbaukörper mit den beiden parallelen Schlitzen.
It shows
  • FIG. 1 shows a representation of the individual process steps for producing a membrane, the membrane and carrier consisting of the same band material
  • FIG. 2 shows an illustration of the individual processes for producing a membrane, the membrane and carrier consisting of the same band material,
  • FIG. 3 shows the individual processes for producing a membrane, a special carrier tape being used,
  • FIG. 4 the use of the amplifier circuit as a carrier,
  • FIG. 5 shows a section through the body and the guidance of the connecting wires,
  • 6 shows a section through a complete converter and
  • Figure 7 is a plan view of a body with the two parallel slots.

Fig. zeigt die einzelnen Arbeitsgänge zur Herstellung einer Membrane. In das bandförmige Material 7 werden zunächst die Transportlöcher 9 eingestanzt, diese dienen sowohl zur Fortbewegung des Bandes 7 als auch zur exakten Positionierung. Der Verfahrensschritt A betrifft die .Formung der Membrane 5 durch beispielsweise Tiefziehen. Im Verfahrensschritt B erfolgt das Ausstanzen der Flächen 10, wobei die Membran und der Träger durch die belassenen Stege 11 im Band weiterhin gehalten werden. Das Einsetzen und Ankleben der Schwingspule 2 in die Membrane 5 geschieht im Verfahrensschritt C, dabei werden auch die beiden Anschlußdrähte 1 der Schwingspule 2 an den Punkten 4 auf dem Träger 3 befestigt. Dies geschieht im Abstand des Außendurchmessers der Schwingspule. Der letzte Verfahrensschritt beinhaltet das Freistanzen von Membrane 5 und Träger 3 durch Entfernen der Stege 11. Die Membrane kann nun in den Aufbaukörper eingesetzt werden.Fig. Shows the individual operations for producing a membrane. The transport holes 9 are first punched into the band-shaped material 7, these serve both for the movement of the band 7 and for exact positioning. Process step A relates to the shaping of the membrane 5 by, for example, deep drawing. In method step B, the surfaces 10 are punched out, using the membrane and the carrier continues to be held in the band by the left webs 11. The voice coil 2 is inserted and glued into the diaphragm 5 in method step C, the two connecting wires 1 of the voice coil 2 are also fastened to the points 3 on the carrier 3. This is done at a distance from the outer diameter of the voice coil. The last process step involves punching membrane 5 and carrier 3 free by removing the webs 11. The membrane can now be inserted into the body.

In Fig. 2 wird der gleiche Vorgang gezeigt, wobei ein besonderes Trägerband 8 verwendet wird. Die einzelnen Verfahrensschritte wurden bereits anhand von Fig. erläutert.The same process is shown in FIG. 2, a special carrier tape 8 being used. The individual process steps have already been explained with reference to FIG.

Fig. zeigt die Verwendung der Verstärkerschaltung 24 als Träger, an deren Anschlußstifte 23 die beiden Anschlußdrähte 1 der Schwingspule während des Verfahrensschritts C befestigt werden. Die Verstärkerschaltung 24 kann nun auf einem besonderen Trägerband parallel mit dem Bandmaterial bewegt und ausgestanzt werden. Es muß nur dafür gesorgt werden, daß die Verstärkerschaltung 24 parallel mit der verbundenen Schwingspule bis zum Freistanzen (Verfahrensschritt D) bewegt wird.Fig. Shows the use of the amplifier circuit 24 as a carrier, on the pins 23, the two connecting wires 1 of the voice coil are attached during step C. The amplifier circuit 24 can now be moved and punched out in parallel on a special carrier tape with the tape material. It only has to be ensured that the amplifier circuit 24 is moved in parallel with the connected voice coil until punching free (method step D).

Beim Einsetzen der Membrane 5 (Fig. 4a) in den Aufbaukörper 20 werden die beiden Anschlußdrähte 1 der Schwingspule 2 mit dem nicht gezeigten Träger über die Auflagefläche 22 der Membrane gezogen. Anschließend wird die Auflagefläche erwärmt und die Membrane durch senkrechten Druck auf die Auflagefläche gepreßt. Das thermoplastiche Material des Aufbaukörpers 20 erwärmt sich an dieser Stelle, worauf die beiden Anschlußdrähte 1 in die Auflagefläche 22 eingebettet und die Membrane 5 mit dem Aufbaukörper 20 verbunden wird. In Fig. 4b wird ein mit den Schlitzen 21 versehener Aufbaukörper 20 gezeigt. Mit dem Einsetzen der Membrane 5 werden die beiden Anschlußdrähte 1 mit dem nicht gezeigten Träger gleichzeitig in die beiden Schlitze 21 eingelegt, so daß diese zwischen der Membrane 5 und dem Magnetsystem verlaufen und unterhalb der Membrane zur Außenseite auftreten. Der Aufbau eines derartigen Wandlers ist bereits in der älteren europäischen Patentanmeldung EP-A1 22544 beschrieben.When the membrane 5 (FIG. 4a) is inserted into the body 20, the two connecting wires 1 of the voice coil 2 with the carrier, not shown, are pulled over the bearing surface 22 of the membrane. Then the support surface is heated and the membrane is pressed onto the support surface by vertical pressure. The thermoplastic material of the body 20 heats up at this point, whereupon the two connecting wires 1 are embedded in the support surface 22 and the membrane 5 is connected to the body 20. A structural body 20 provided with the slots 21 is shown in FIG. 4b. With the insertion of the membrane 5, the two connecting wires 1 with the carrier, not shown, are simultaneously inserted into the two slots 21, so that they run between the membrane 5 and the magnet system and occur below the membrane to the outside. The construction of such a converter is already described in the older European patent application EP-A1 22544.

In Fig. 5 wird der Querschnitt eines vollständigen elektrodynamischen Wandlers gezeigt, wobei an der Unterseite des Aufbaukörpers 20 eine Verstärkerschaltung 24 angebracht ist. Die beiden Anschlußdrähte 1 werden mit Hilfe des Trägers in die Schlitze 21 eingelegt und zur Verstärkerschaltung 24 zur Unterseite des Aufbaukörpers 20 an die Anschlußstifte geführt, wo jeweils ein Draht um einen Anschlußstift gewickelt wird. Mit Hilfe des Trägers kann dies bei beiden Anschlußstiften gleichzeitig geschehen. Anschließend werden am Träger die überstehenden Drahtenden abgetrennt. Ist die Schwingspule 2 der Membrane 5 bereits mit der Verstärkerschaltung 24 gemäß der Darstellung in Fig.3 verbunden, so wird die Membrane 5 in den Aufbaukörper eingesetzt, die beiden Anschlußdrähte werden durch die Verstärkerschaltung 24 geführt, in die beiden Schlitze 21 eingelegt und anschließend die Verstärkerschaltung 24 an der Unterseite des Aufbaukörpers 20 befestigt.5 shows the cross section of a complete electrodynamic converter, an amplifier circuit 24 being attached to the underside of the body 20. The two connecting wires 1 are inserted into the slots 21 with the aid of the carrier and guided to the amplifier circuit 24 on the underside of the body 20 to the connecting pins, where one wire is wound around a connecting pin. With the help of the carrier, this can be done simultaneously with both connecting pins. The protruding wire ends are then cut off on the carrier. If the voice coil 2 of the membrane 5 is already connected to the amplifier circuit 24 as shown in FIG. 3, the membrane 5 is inserted into the body, the two connecting wires are guided through the amplifier circuit 24, inserted into the two slots 21 and then the Amplifier circuit 24 attached to the underside of the body 20.

Claims (3)

1. A method for the manufacture of an electrodynamic transducer consisting of an assembly case (20) for holding the permanent magnet system and the membrane (5) with coil (2), said assembly case (20) is insertable into a housing; whereby said housing and/or the assembly case (20) is provided at its bottom side with an electric amplifier circuit (24) having terminal pins (23), said assembly case (20) is furnished with two parallel slits (21) for holding the connecting wires (1) of the coil (2), whereby the distance of said slits (21) corresponds with the diameter of the coil (2), both connecting wires (1) of the coil (2) are fixed in parallel in the distance of the coil diameter each at a point on a support in a certain distance outside of said membrane (5) and both connecting wires (1) are lead below the membrane (5) to the bottom side of the assembly case (20) when the membrane (5) is mounted in the assembly case (20), said method comprising that the leading of the connecting wires (1) is performed by use of the support and said support is formed by the amplifier circuit (24), which is transported and punched out in parallel to the band (7) from which the membrane (5) is formed, that the connecting wires (1) are inserted in the slits (21) of the assembly case (20), then the membrane (5) is inserted and finally the amplifier circuit (24) is mounted on the bottom side of the assembly case (20).
2. A method as set forth in claim 1, wherein the punching of the support and membrane (5) is performed simultaneously.
3. A method as set forth in claim 1, wherein the support is identical with the band (7) of which the membrane (5) is formed, the support is punched out to some extent and after the mounting of the coil (2) on the membrane (3) and the fixing of the connecting wires (1) on the support, the membrane (5) and the support are punched out completely.
EP80104067A 1979-07-20 1980-07-14 Method of making an electrodynamic transducer Expired EP0023007B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80104067T ATE2042T1 (en) 1979-07-20 1980-07-14 METHOD OF MAKING AN ELECTRODYNAMIC TRANSDUCER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2929432A DE2929432C2 (en) 1979-07-20 1979-07-20 Method of manufacturing an electrodynamic transducer
DE2929432 1979-07-20

Publications (2)

Publication Number Publication Date
EP0023007A1 EP0023007A1 (en) 1981-01-28
EP0023007B1 true EP0023007B1 (en) 1982-12-15

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EP80104067A Expired EP0023007B1 (en) 1979-07-20 1980-07-14 Method of making an electrodynamic transducer

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EP (1) EP0023007B1 (en)
AT (1) ATE2042T1 (en)
DE (1) DE2929432C2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8600267A (en) * 1986-02-04 1987-09-01 Philips Nv ELECTRODYNAMIC CONVERTER.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0022544A1 (en) * 1979-07-11 1981-01-21 Telefonbau und Normalzeit GmbH Electrodynamic transducer, in particular for telephonic apparatus

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE26030E (en) * 1956-02-28 1966-05-24 Dynamic transducer
GB830117A (en) * 1958-07-04 1960-03-09 Standard Telephones Cables Ltd Improvements in or relating to electro-acoustic transducers
NL6712007A (en) * 1967-08-31 1969-03-04
GB1219918A (en) * 1968-08-08 1971-01-20 Standard Telephones Cables Ltd Improvements in and relating to moving coil transducers
NL7112001A (en) * 1971-09-01 1973-03-05

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0022544A1 (en) * 1979-07-11 1981-01-21 Telefonbau und Normalzeit GmbH Electrodynamic transducer, in particular for telephonic apparatus

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Publication number Publication date
DE2929432C2 (en) 1981-08-13
ATE2042T1 (en) 1982-12-15
DE2929432B1 (en) 1980-11-06
EP0023007A1 (en) 1981-01-28

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