EP0022544B1 - Electrodynamic transducer, in particular for telephonic apparatus - Google Patents

Electrodynamic transducer, in particular for telephonic apparatus Download PDF

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Publication number
EP0022544B1
EP0022544B1 EP80103889A EP80103889A EP0022544B1 EP 0022544 B1 EP0022544 B1 EP 0022544B1 EP 80103889 A EP80103889 A EP 80103889A EP 80103889 A EP80103889 A EP 80103889A EP 0022544 B1 EP0022544 B1 EP 0022544B1
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EP
European Patent Office
Prior art keywords
electro
assembly case
set forth
dynamic transducer
slits
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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
EP80103889A
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German (de)
French (fr)
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EP0022544A1 (en
Inventor
Herbert Ing. Grad. Hofman
Franz Rumianek
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Tenovis GmbH and Co KG
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Telefonbau und Normalzeit GmbH
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Priority to AT80103889T priority Critical patent/ATE1836T1/en
Publication of EP0022544A1 publication Critical patent/EP0022544A1/en
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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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/06—Arranging circuit leads; Relieving strain on circuit leads
    • 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
    • H04R9/10—Telephone receivers

Definitions

  • the invention relates to an electrodynamic transducer with electrical connections attached to its underside, in particular for telephone sets, consisting of a housing which can be closed with a lid and into which a body for inserting the diaphragm with a voice coil and the magnet system is inserted, the pot-shaped body having a concentric bearing surface for the diaphragm and two guide slots for the lead wires of the voice coil attached to the diaphragm.
  • Electrodynamic transducers are used in telephone sets in the form of speech or hearing capsules in the handset, the electrical connection points in the form of contact surfaces or connector pins being attached to the underside of the transducers.
  • Such transducers have a membrane on which an annular voice coil is attached, which is. moved in a permanent magnetic field.
  • the problem of guiding the electrical connection wires of the voice coil through the interior of the transducer housing to the electrical connection points located on the underside occurs.
  • DE-PS 692 963 describes an electrodynamic transducer in which one connecting wire of the voice coil axia1 is guided to an electrical connection point which is attached centrally on the underside, while the other connecting wire is clamped together with the membrane to the electrically conductive housing. This solution cannot be used for housings made of electrically non-conductive material.
  • the object of the present invention is therefore to provide a solution for connecting the voice coil with the connection points attached to the underside of the converter housing, which requires a minimum of soldering points and facilitates the alignment and guiding of the connection wires.
  • the connecting wires should be protected against possible damage.
  • this object is achieved in that the top of the body is provided with a flange, that the support surface is located within the flange and that the support surface is provided with two adjacent, parallel, across the entire width transverse slots, which the flange cut through.
  • the two connecting wires of the Schwinaspule can be run parallel to the membrane between the support surface and the membrane.
  • German utility model GM 7 830 908 describes an electroacoustic transducer with a carrier plate which is provided on its outer edge with one or more slots for guiding the electrical supply wires.
  • the membrane does not rest on the carrier plate itself, but is held by two ring-shaped bearing bodies.
  • the supply wires are guided between the carrier plate and the lower bearing body.
  • the invention avoids this type of wire guide, in that the supply wires are already guided downwards in front of the contact surface of the membrane. In this way, damage to the wire by chafing is avoided.
  • a further development of the invention also consists in that the slots on the outside of the body and on the edge towards the bottom are continued by notches. These notches serve to receive the two connecting wires so that they are protected against mechanical damage.
  • the distance between the two slots corresponds to the outer diameter of the voice coil. If the voice coil is shaped in such a way that its two connecting lines come off at two opposite points on the outside, both connecting wires can be inserted into the slots before the membrane is attached.
  • the body consists of electrically non-conductive material. Due to this measure, no damage can be done to the insulation coating of the connecting wires electrical short circuits occur.
  • An advantageous development of the invention also consists in that an electrical amplifier circuit is attached to the underside of the body, which has two connecting pins aligned with the slots and / or notches. This holds the lead wires wrapped around the two pins in the slots and notches. In addition, both electrical connections can be made simultaneously.
  • An advantageous development of the invention also consists in the fact that the amplifier circuit has punched wiring, on the top of which the electrical components are connected and which is attached with its underside to the underside of the body. Because the body consists of electrically non-conductive material, it can itself be used as a carrier for the wiring. In addition, the two electrical connection points can be produced in the form of pins from the stamped wiring in this way, so that no further operations such as riveting, electrical connection, etc. are necessary for their provision.
  • a further development of the invention also consists in the fact that the body has parallel webs on its underside, in the spaces between which the punched wiring can be inserted, which is held by guides.
  • the guides are used to position the punched wiring, which can be used in such a way that the parallel webs lie between parallel conductor tracks.
  • a further development of the invention also consists in the fact that the body consists of a thermoplastic material and that after insertion of the punched wiring, the webs are heated and deformed in such a way that the wiring is fixed immovably.
  • the heating of the webs projecting beyond the wiring and the subsequent deformation under pressure has the result that the webs separated from one another by the conductor tracks are connected to one another via the conductor tracks.
  • a further development of the invention also consists in the fact that the housing has webs which close the slots of the body in the inserted state.
  • the slots in the body change the air friction resistance between the individual air spaces within the converter if they are not closed.
  • the housing has webs which close the notches of the body in the inserted state. This measure serves to cover the wire guide notches of the body by corresponding webs of the housing.
  • the slots in the body are now closed to such an extent that, in the assembled state, the acoustic behavior is not changed by the slots in the body.
  • FIG. 2 the section through an electrodynamic speech capsule is shown.
  • a housing body 1 is seated in a housing 11 which can be closed with a cover 12 and in which a magnet system consisting of an annular permanent magnet 14 and the likewise annular pole plates 15 and 16 is inserted.
  • the voice coil 6, which is attached to the diaphragm 3, is located in the air gap of the magnet system.
  • the membrane lies on the support surface 2 of the body 1.
  • the two connecting wires 23 of the voice coil 6, only one of which is shown, are guided by the voice coil 6 above the magnet system and below the membrane 3 on the outer edge of the body 1 to the amplifier shade 7 fastened to the underside of the body and to the soldering pins 8, only one of which is also shown attached.
  • the amplifier circuit 7 consists of a stamped wiring 9, which is permanently connected to the underside of the body 1 by means of the broadly squeezed webs 10
  • the structural body 1 which is made of electrically non-conductive material, has, as shown in FIG. 1, a flange 5 on its upper side, within which the bearing surface 2 of the membrane is located.
  • a flange 5 on its upper side, within which the bearing surface 2 of the membrane is located.
  • two parallel slots 4 are made, which cut through both the flange 5 and the support surface 2 of the membrane, and the slots of the notches 18 are continued in the cylindrical part of the body on the outside.
  • the distance between the two slots 4 corresponds to the outer diameter of the voice coil 6, which is attached to the membrane 3.
  • the guides 13 attached to the underside of the body have the task of clearly positioning the same when inserting the punched wiring into the webs 10 until the stamped circuit is held immovably by the plastic deformation of the webs.
  • the body 1 is therefore made of a thermoplastic material.
  • Fig. 3 shows the body 1 in a view from below with the stamped wiring 9 attached to the underside.
  • the connecting pins 8 are arranged such that they lie at the end of the notches 18 so that the respective connecting wire of the voice coil lying in a notch brought up directly to the respective pin 8 and can be electrically connected to it.
  • the two connection pins 22 for the electrical connection of the electrodynamic converter are also formed from the stamped wiring and are bent upwards at right angles.
  • Fig. 4 shows the housing 11 with the two internally attached webs 17, which close the slots 4 of the body 1 and the two webs 19, which cover the notches 18 of the body 1.
  • the two chambers 21 each have a slot through which a connector pin 22 of the stamped wiring 9 is passed.
  • the distance between the two parallel slots 4 and the two notches 18 corresponds to the outer diameter of the voice coil 6 when the connecting wires 23 are guided away from the outside of the voice coil 6 at two opposite locations.

Abstract

1. Electro-dynamic transducer particularly for telephone stations with terminals (22) on the bottom side consisting of a housing (11) closeable with a cover (12) in which an assembly case (1) can be inserted, said assembly case (1) holds the membrane (3) with coil (6) and the magnetic system (14, 15, 16), whereby the cup shaped assembly case is provided with a concentric bearing surface (2) for the membrane (3) and two guiding slits (4, 18) for the connecting wires (23) of the coil (6) fixed on the membrane (3), said transducer comprising that the assembly case on its upper side is provided with a flange (5), that the bearing surface (2) is located within the flange (5) and is furnished with two parallel side by side oriented slits (4) running transversally across the whole width intersecting the flange (5).

Description

Die Erfindung betrifft einen elektrodynamischer Wandler mit an seiner Unterseite angebrachten elektrischen Anschlüssen, insbesondere für Fernsprechapparate, bestehend aus einem mit einem Deckel verschließbaren Gehäuse, in welches ein Aufbaukörper zur Aufnahme der Membrane mit Schwingspule und des Magnetsystems eingesetzt ist, wobei der topfförmige Aufbaukörper eine konzentrische Auflagefläche für die Membrane und zwei Führungsschlitze für die Zuführungsdrähte der an der Membrane befestigten Schwingspule aufweist.The invention relates to an electrodynamic transducer with electrical connections attached to its underside, in particular for telephone sets, consisting of a housing which can be closed with a lid and into which a body for inserting the diaphragm with a voice coil and the magnet system is inserted, the pot-shaped body having a concentric bearing surface for the diaphragm and two guide slots for the lead wires of the voice coil attached to the diaphragm.

Elektrodynamische Wandler werden bei Fernsprechapparaten in Form von Sprech- oder Hörkapseln in den Handapparat eingesetzt, wobei die elektrischep Anschlußpunkte in Form von Kontaktflächen oder Steckerstiften an der Unterseite der Wandler angebracht sind. Derartige Wandler weisen eine Membrane auf, an welcher eine ringförmige Schwingspule angebracht ist, die sich. in einem Permanent-Magnetfeld bewegt. Bei der Herstellung der elektrodynamischen Wandler tritt das Problem der Führung der elektrischen Anschlußdrähte der Schwingspule durch das Innere des Wandlergehäuses zu den an der Unterseite befindlichen elektrischen Anschlußpunkten auf.Electrodynamic transducers are used in telephone sets in the form of speech or hearing capsules in the handset, the electrical connection points in the form of contact surfaces or connector pins being attached to the underside of the transducers. Such transducers have a membrane on which an annular voice coil is attached, which is. moved in a permanent magnetic field. In the manufacture of the electrodynamic transducers, the problem of guiding the electrical connection wires of the voice coil through the interior of the transducer housing to the electrical connection points located on the underside occurs.

In der DE-PS 692 963 wird ein elektrodynamischer Wandler beschrieben, bei welchem der eine Anschlußdraht der Schwingspule axia1 zu einem an der Unterseite zentrisch angebrachten elektrischen Anschlußpunkt geführt wird, während der andere Anschlußdraht mit der Membrane zusammen an das elektrisch leitende Gehäuse geklemmt wird. Diese Lösung ist bei Gehäusen aus elektrisch nicht leitendem Material nicht anwendbar.DE-PS 692 963 describes an electrodynamic transducer in which one connecting wire of the voice coil axia1 is guided to an electrical connection point which is attached centrally on the underside, while the other connecting wire is clamped together with the membrane to the electrically conductive housing. This solution cannot be used for housings made of electrically non-conductive material.

Eine andere Lösung wird in der DE-AS 1 154 515 angegeben, welche darin besteht, daß die beiden Anschlüsse der Schwingspule außerhalb des Magnetsystems geführt und innerhalb des Gehäuses mit jeweils einer Lötfahne elektrisch verbunden sind. Die Weiterführung der beiden elektrischen Verbindungen zu den an der Unterseite des Gehäuses angebrachten Anschlußpunkten erfolgt über eine weitere Verdrahtung. Nachteilig bei dieser Lösung ist das Vorhandensein von vier Lötstellen.Another solution is given in DE-AS 1 154 515, which consists in that the two connections of the voice coil are guided outside the magnet system and are electrically connected within the housing with a soldering lug each. The two electrical connections to the connection points attached to the underside of the housing are continued via further wiring. The disadvantage of this solution is the presence of four solder joints.

Weiterhin ist vorgeschlagen worden, die beiden Anschlußleitungen der Schwingspule zentrisch durch das Magnetsystem zur Unterseite des elektrodynamischen Wandlers zu führen. Nachteilig bei dieser Lösung ist das komplizierte Herstellungsverfahren (DE-ES 1 240127).It has also been proposed to lead the two connecting lines of the voice coil centrally through the magnet system to the underside of the electrodynamic converter. A disadvantage of this solution is the complicated manufacturing process (DE-ES 1 240127).

Weiterhin ist vorgeschlagen worden, die beiden Anschlußdrähte der Schwingspule an elastischen Kontaktstreifen anzulöten und diese zwischen den beiden, die Membrane haltenden Ringe durchzuführen. In der DE-AS 2165572 gezeigten Lösung ist eine Weiterführung der elektrischen Verbindung von den Kontaktstreifen zur Unterseite des Wandlergehäuses notwendig, wodurch wiederum zwei zusätzliche Lötstellen benötigt werden.Furthermore, it has been proposed to solder the two connecting wires of the voice coil to elastic contact strips and to carry them out between the two rings holding the membrane. In the solution shown in DE-AS 2165572, a continuation of the electrical connection from the contact strips to the underside of the converter housing is necessary, which in turn requires two additional soldering points.

Die Aufgabe der vorliegenden Erfindung besteht deshalb darin, eine Lösung zum Anschluß der Schwingspule mit den an der Unterseite des Wandlergehäuses angebrachten Anschlußstellen anzugeben, welche mit einem Minimum an Lötstellen auskommt und das Ausrichten und Führen - der Anschlußdrähte erleichtert. Außerdem sollen die Anschlußdrähte gegen eventuelle Beschädigungen geschützt werden.The object of the present invention is therefore to provide a solution for connecting the voice coil with the connection points attached to the underside of the converter housing, which requires a minimum of soldering points and facilitates the alignment and guiding of the connection wires. In addition, the connecting wires should be protected against possible damage.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß der Aufbaukörper an seiner Oberseite mit einem Flansch versehen ist, daß sich die Auflagefläche innerhalb des Flansches befindet und daß die Auflagefläche mit zwei nebeneinanderliegenden, parallelen, über die ganze Breite quer verlaufenden Schlitzen versehen ist, welche den Flansch durchschneiden. Auf diese Weise können die beiden Anschlußdrähte der Schwinaspule parallel zur Membrane zwischen der Auflagefläche und der Membrane geführt werden.According to the invention this object is achieved in that the top of the body is provided with a flange, that the support surface is located within the flange and that the support surface is provided with two adjacent, parallel, across the entire width transverse slots, which the flange cut through. In this way, the two connecting wires of the Schwinaspule can be run parallel to the membrane between the support surface and the membrane.

In dem deutschen Gebrauchsmuster GM 7 830 908 wird ein elektroakustischer Wandler mit einer Trägerplatte beschrieben, welche an ihrem äußeren Rand mit ein oder mehreren Schlitzen zur Führung der elektrischen Zuführungsdrähte versehen ist. Die Membrane liegt dabei nicht auf der Trägerplatte selbst auf, sondern wird durch zwei ringförmige Lagerkörper gehalten. Dabei sind die Zufuhrungsdrähte zwischen der Trägerplatte und dem unteren Lagerkörper hindurchgeführt.Die Erfindung vermeidet diese Art der Drahtführung, in dem bereits vor der Auflagefläche der Membrane die Zuführungsdrähte bereits nach unten weggeführt werden. Auf diese Weise wird eine Beschädigung des Drahtes durch Durchscheuern vermieden.German utility model GM 7 830 908 describes an electroacoustic transducer with a carrier plate which is provided on its outer edge with one or more slots for guiding the electrical supply wires. The membrane does not rest on the carrier plate itself, but is held by two ring-shaped bearing bodies. The supply wires are guided between the carrier plate and the lower bearing body. The invention avoids this type of wire guide, in that the supply wires are already guided downwards in front of the contact surface of the membrane. In this way, damage to the wire by chafing is avoided.

Eine Weiterbildung der Erfindung besteht auch darin, daß die Schlitze an der Außenseite des Aufbaukörpers und an der Kante zur Unterseite durch Kerben fortgesetzt .sind. Diese Kerben dienen zur Aufnahme der beiden Anschlußdrähte, so daß diese gegen mechanische Beschädigung geschützt sind.A further development of the invention also consists in that the slots on the outside of the body and on the edge towards the bottom are continued by notches. These notches serve to receive the two connecting wires so that they are protected against mechanical damage.

Eine Weiterbildung der Erfindung besteht auch darin, daß der Abstand der beiden Schlitze dem Außendurchmesser der Schwingspule entspricht. Wird die Schwingspule derart geformt, daß ihre beiden Anschlußleitungen an zwei gegenüberliegenden Punkten an der Außenseite abgehen, so lassen sich beide Anschlußdrähte vor Befestigung der Membrane in die Schlitze einlegen.A further development of the invention is that the distance between the two slots corresponds to the outer diameter of the voice coil. If the voice coil is shaped in such a way that its two connecting lines come off at two opposite points on the outside, both connecting wires can be inserted into the slots before the membrane is attached.

Eine Weiterbildung der Erfindung besteht darin, daß der Aufbaukörper aus elektrisch nicht leitendem Material besteht. Durch diese Maßnahme können durch die Beschädigung des Isolierlacküberzugs der Anschlußdrähte keine elektrischen Kurzschlüsse auftreten.A further development of the invention is that the body consists of electrically non-conductive material. Due to this measure, no damage can be done to the insulation coating of the connecting wires electrical short circuits occur.

Eine vorteilhafte Weiterbildung der Erfindung besteht auch darin, daß an der Unterseite des Aufbaukörpers eine elektrische Verstärkerschaltung angebracht ist, welche zwei mit den Schlitzen und/oder Kerben fluchtende Anschlußstifte aufweist. Damit werden die um die beiden Anschlußstifte gewickelten Anschlußdrähte in den Schlitzen und Kerben gehalten. Außerdem lassen sich beide elektrischen Verbindungen gleichzeitig herstellen.An advantageous development of the invention also consists in that an electrical amplifier circuit is attached to the underside of the body, which has two connecting pins aligned with the slots and / or notches. This holds the lead wires wrapped around the two pins in the slots and notches. In addition, both electrical connections can be made simultaneously.

Eine vorteilhafte Weiterbildung der Erfindung besteht auch darin, daß die Verstärkerschaltung eine gestanzte Verdrahtung aufweist, an deren Oberseite die elektrischen Bauteile angeschlossen sind und die mit ihrer Unterseite an der Unterseite des Aufbaukörpers befestigt ist. Dadurch, daß der Aufbaukörper aus elektrisch nicht leitendem Material besteht, kann dieser selbst als Träger der Verdrahtung herangezogen werden. Außerdem lassen sich auf diese Weise die beiden elektrischen Anschlußpunkte in Form von Stiften aus der gestanzten Verdrahtung herstellen, so daß für deren Bereitstellung keine weiteren Arbeitsgänge, wie Annieten, elektrisches Anschließen, usw. notwendig sind.An advantageous development of the invention also consists in the fact that the amplifier circuit has punched wiring, on the top of which the electrical components are connected and which is attached with its underside to the underside of the body. Because the body consists of electrically non-conductive material, it can itself be used as a carrier for the wiring. In addition, the two electrical connection points can be produced in the form of pins from the stamped wiring in this way, so that no further operations such as riveting, electrical connection, etc. are necessary for their provision.

Eine Weiterbildung der Erfindung besteht auch darin, daß der Aufbaukörper an seiner Unterseite parallele Stege aufweist, in deren Zwischenräume die gestanzte Verdrahtung einsetzbar ist, die durch Führungen gehalten wird. Die Führungen dienen zur Positionierung der gestanzten Verdrahtung, welche derart einsetzbar ist, daß zwischen parallel laufenden Leiterbahnen die parallelen Stege liegen.A further development of the invention also consists in the fact that the body has parallel webs on its underside, in the spaces between which the punched wiring can be inserted, which is held by guides. The guides are used to position the punched wiring, which can be used in such a way that the parallel webs lie between parallel conductor tracks.

Eine Weiterbildung der Erfindung besteht auch darin, daß der Aufbaukörper aus einem thermoplastischen Material besteht und daß nach Einsetzen der gestanzten Verdrahtung die Stege erwärmt und derart verformt werden, daß die Verdrahtung unverrückbar befestigt wird. Das Erwärmen der über- die Verdrahtung hinausragenden Stege und die anschließende Verformung unter Druck hat zur Folge, daß die durch die Leiterbahnen voneinander getrennten Stege über die Leiterbahnen hinweg miteinander verbunden werden.A further development of the invention also consists in the fact that the body consists of a thermoplastic material and that after insertion of the punched wiring, the webs are heated and deformed in such a way that the wiring is fixed immovably. The heating of the webs projecting beyond the wiring and the subsequent deformation under pressure has the result that the webs separated from one another by the conductor tracks are connected to one another via the conductor tracks.

Eine Weiterbildung der Erfindung besteht auch darin, daß das Gehäuse Stege aufweist, welche die Schlitze des Aufbaukörpers im eingesetzten Zustand verschließen. Die im Aufbaukörper vorhandenen Schlitze verändern den Luftreibungswiderstand zwischen den einzelnen Lufträumen innerhalb des Wandlers, wenn sie nicht verschlossen werden.A further development of the invention also consists in the fact that the housing has webs which close the slots of the body in the inserted state. The slots in the body change the air friction resistance between the individual air spaces within the converter if they are not closed.

Eine Weiterbildung der Erfindung besteht auch darin, daß das Gehäuse Stege aufweist, welche die Kerben des Aufbaukörpers im eingesetzten Zustand verschließen. Diese Maßnahme dient zur Abdeckung der Drahtführungskerben des Aufbaukörpers durch entsprechende Stege des Gehäuses.A further development of the invention is that the housing has webs which close the notches of the body in the inserted state. This measure serves to cover the wire guide notches of the body by corresponding webs of the housing.

Eine Weiterbildung der Erfindung besteht auch darin, daß die Schlitze und die Stege derart ausgebildet sind, daß im zusammengesetzten Zustand von Aufbaukörper=ünd Gehäuse Öffnungen 20 in Fig. 1 gebildet werden, weiche mit den konzentrisch, am Aufbaukörper angebrachten Langlöchern radial fluchten. Diese Langlöcher dienen zum Luftausgieich zwischen dem Luftraum hinter der Membran und einem zweiten Luftraum im Kapselinnern. Durch die am Gehäuse angebrachten Stege werden nun die Schlitze des Aufbaukörpers soweit verschlossen, daß sich im zusammengesetzten Zustand an dem akustischen Verhalten durch die am Aufbaukörper angebrachten Schlitze nichts verändert wird.A further development of the invention consists in the fact that the slots and the webs are formed so as to be formed in the assembled state of Aufbaukör p er = Uend housing openings 20 in Fig. 1, soft with the concentric, radially aligned on the building body mounted slotted holes. These elongated holes are used to balance the air between the air space behind the membrane and a second air space inside the capsule. By means of the webs attached to the housing, the slots in the body are now closed to such an extent that, in the assembled state, the acoustic behavior is not changed by the slots in the body.

Weitere Vorteile ergeben sich aus den Unteransprüchen.Further advantages result from the subclaims.

Die Erfindung wird anhand eines Ausführungsbeispiels näher erläutert, welches in der Zeichnung dargestellt ist.The invention is explained in more detail using an exemplary embodiment which is illustrated in the drawing.

Es zeigt

  • Fig. 1 die Draufsicht, die Seitenansicht und die Unterseite eines Aufbaukörpers,
  • Fig. 2 einen Schnitt durch eine elektrodynamische Sprechkapsel,
  • Fig. 3 die an der Unterseite des Aufbaukörpers befestigte Verstärkerschaltung mit gestanzter Verdrahtung und
  • Fig. 4 Draufsicht, Seitenansicht und Ansicht von unten des Gehäuses einer elektrodynamischen Sprechkapsel.
It shows
  • 1 shows the top view, the side view and the underside of a body,
  • 2 shows a section through an electrodynamic speech capsule,
  • Fig. 3 shows the amplifier circuit fastened to the underside of the body with punched wiring and
  • Fig. 4 top view, side view and bottom view of the housing of an electrodynamic speech capsule.

In Fig. 2 wird der Schnitt durch eine elektrodynamische Sprechkapsel gezeigt. In einem mit einem Deckel 12 verschließbaren Gehäuse 11 sitzt ein Aufbaukörper 1, in welchen ein Magnetsystem bestehend aus einem ringförmigen Permanent-Magneten 14 und den ebenfalls ringförmigen Pol-Blechen 15 und 16 eingesetzt ist. Im Luftspalt des Magnetsystems befindet sich die Schwingspule 6, die an der Membrane 3 befestigt ist. Die Membrane liegt auf der Auflagefläche 2 des Aufbaukörpers 1 auf. Die beiden Anschlußdrähte 23 der Schwingspule 6, von denen nur einer gezeigt ist, werden von der Schwingspule 6 oberhalb des Magnetsystems und unterhalb der Membrane 3 am Außenrand des Aufbaukörpers 1 zu der an der Unterseite des Aufbaukörpers befestigten Verstärkerschattung 7 geführt und an den Lötstiften 8, von denen ebenfalls nur einer gezeigt ist, befestigt. Die Verstärkerschaltung 7 besteht aus einer gestanzten Verdrahtung 9, die mittels der breit gequetschten Stege 10 mit der Unterseite des Aufbaukörpers 1 unlösbar verbunden istIn Fig. 2 the section through an electrodynamic speech capsule is shown. A housing body 1 is seated in a housing 11 which can be closed with a cover 12 and in which a magnet system consisting of an annular permanent magnet 14 and the likewise annular pole plates 15 and 16 is inserted. The voice coil 6, which is attached to the diaphragm 3, is located in the air gap of the magnet system. The membrane lies on the support surface 2 of the body 1. The two connecting wires 23 of the voice coil 6, only one of which is shown, are guided by the voice coil 6 above the magnet system and below the membrane 3 on the outer edge of the body 1 to the amplifier shade 7 fastened to the underside of the body and to the soldering pins 8, only one of which is also shown attached. The amplifier circuit 7 consists of a stamped wiring 9, which is permanently connected to the underside of the body 1 by means of the broadly squeezed webs 10

Der Aufbaukörper 1, der aus elektrisch nicht leitendem Material gefertigt ist, weist, wie in Fig. 1 gezeigt ist, an seiner Oberseite einen Flansch 5 auf, innerhalb dessen sich die Auflagefläche 2 der Membrane befindet. Am Aufbaukörper 1 sind zwei parallele Schlitze 4 angebracht, welche sowohl den Flansch 5 als auch die Auflagefläche 2 der Membrane durchschneiden, außerdem sind die Schlitze der Kerben 18 im zylindrischen Teil des Aufbaukörpers an der Außenseite fortgesetzt. Der Abstand der beiden Schlitze 4 entspricht dabei dem Außendurchmesser der Schwingspule 6, welche an der Membrane 3 befestigt ist.The structural body 1, which is made of electrically non-conductive material, has, as shown in FIG. 1, a flange 5 on its upper side, within which the bearing surface 2 of the membrane is located. On the body 1, two parallel slots 4 are made, which cut through both the flange 5 and the support surface 2 of the membrane, and the slots of the notches 18 are continued in the cylindrical part of the body on the outside. The distance between the two slots 4 corresponds to the outer diameter of the voice coil 6, which is attached to the membrane 3.

Die an der Unterseite des Aufbaukörpers angebrachten Führungen 13 haben die Aufgabe, beim Einsetzen der gestanzten Verdrahtung in die Stege 10 dieselbe eindeutig zu positionieren, bis durch die plastische Verformung der Stege die gestanzte Schaltung unverrückbar festgehalten wird. Der Aufbaukörper 1 wird deshalb aus einem thermoplastischen Material hergestellt.The guides 13 attached to the underside of the body have the task of clearly positioning the same when inserting the punched wiring into the webs 10 until the stamped circuit is held immovably by the plastic deformation of the webs. The body 1 is therefore made of a thermoplastic material.

Fig. 3 zeigt den Aufbaukörper 1 in der Ansicht von unten mit der an der Unterseite befestigten gestanzten Verdrahtung 9. Die Anschlußstifte 8 sind derart angeordnet, daß sie am Ende der Kerben 18 liegen, so daß der jeweilige, in einer Kerbe liegende Anschlußdraht der Schwingspule direkt an den jeweiligen Anschlußstift 8 herangeführt und mit diesen elektrisch verbunden werden kann. Die beiden Anschlußstifte 22 zum elektrischen Anschluß des elektrodynamischen Wandlers werden ebenfalls aus der gestanzten Verdrahtung gebildet und sind nach oben rechtwinklig abgebogen.Fig. 3 shows the body 1 in a view from below with the stamped wiring 9 attached to the underside. The connecting pins 8 are arranged such that they lie at the end of the notches 18 so that the respective connecting wire of the voice coil lying in a notch brought up directly to the respective pin 8 and can be electrically connected to it. The two connection pins 22 for the electrical connection of the electrodynamic converter are also formed from the stamped wiring and are bent upwards at right angles.

Fig. 4 zeigt das Gehäuse 11 mit den beiden innen angebrachten Stegen 17, welche die Schlitze 4 des eingesetzten Aufbaukörpers 1 verschließen und die beiden Stege 19, welche die Kerben 18 des Aufbaukörpers 1 abdecken. Die beiden Kammern 21 weisen jeweils einen Schlitz auf, durch welchen jeweils ein Anschlußstift 22 der gestanzten Verdrahtung 9 hindurchgeführt wird.Fig. 4 shows the housing 11 with the two internally attached webs 17, which close the slots 4 of the body 1 and the two webs 19, which cover the notches 18 of the body 1. The two chambers 21 each have a slot through which a connector pin 22 of the stamped wiring 9 is passed.

Der Abstand der beiden parallelen Schlitze 4 und der beiden Kerben 18 entspricht dem Außendurchmesser der Schwingspule 6, wenn die Anschlußdrähte 23 an zwei gegenüberliegenden Stellen von der Außenseite der Schwingspule 6 weggeführt sind.The distance between the two parallel slots 4 and the two notches 18 corresponds to the outer diameter of the voice coil 6 when the connecting wires 23 are guided away from the outside of the voice coil 6 at two opposite locations.

Claims (13)

1. Electro-dynamic transducer particularly for telephone stations with terminals (22) on the bottom side consisting of a housing (11) closeable with a cover (12) in which an assembly case (1) can be inserted, said assembly case (1) holds the membrane (3) with coil (6) and the magnetic system (14, 15, 16), whereby the cup shaped assembly case is provided with a concentric bearing surface (2) for the membrane (3) and two guiding slits (4,18) for the connecting wires (23) of the coil (6) fixed on the membrane (3), said transducer comprising that the assembly case on its upper side is provided with a flange (5), that the bearing surface (2) is located within the flange (5) and is furnished with two parallel side by side oriented slits (4) running transversally across the whole width intersecting the flange (5).
2. Electro-dynamic transducer as set forth in claim 1, characterized in, that the slits (4) are continued on the outside of the assembly case (1) and at the edge to the bottom side by notches (18).
3. Electro-dynamic transducer as set forth in claims 1 and 2, characterized in, that the distance of the slits (4) corresponds with the outside diameter of the coil (6).
4. Electro-dynamic transducer as set forth in claim 1, characterized in, that the assembly case (1) consists of electric non conducting material.
5. Electro-dynamic transducer as set forth in claims 1 to 3, characterized in, that an electrical amplifier circuit (7) is mounted on the bottom side of the assembly case (1) which is provided with two terminal pins (8) aligned with the slits (4) and/or the notches (18).
6. Electro-dynamic transducer as set forth in claim 5, characterized in, that the amplifier circuit (7) is provided with a punched wiring (9), whereby the electric components are mounted on the upper side of said of said wiring (7) and the amplifier circuit (7) is mounted with its bottom side on the bottom side of the assembly case (1).
7. Electro-dynamic transducer as set forth in claims 5 and 6, characterized in, that the assembly case (1) is provided on its bottom side with parallel flanges (10) for the reception of the punched wiring (9) in the space between said flanges, whereby said punched wiring is kept by guides (13).
8. Electro-dynamic transducer as set forth in claim 7, characterized in, that the assembly case (1) consists of thermo-plastic material and that after the insertion of the punched wiring (9) the flanges (10) are heated and formed in such a manner that the wiring (9) is fixed immovably.
9. Electro-dynamic transducer as set forth in one of claims 1 to 3, characterized in, that the housing (4) is provided with flanges (17) which close the slits (4) of the assembly case (1) in the inserted position.
10. Electro-dynamic transducer as set forth in claim 9, characterized in, that the housing (11) is provided with flanges (19) which close the notches, (18} of the assembly case (1) in the inserted position.
11. Electro-dynamic transducer as set forth in one of claims 1 to 10, characterizing in, that the slits (4) and theflanges (17) are.formed in such a matter, that apertures are formed which align radially with the annular slots (70) of the assembly case when the assembly case (1) is inserted in the housing (11).
12. Electro-dynamic transducer as set forth in claim 6, characterizing in, that the outer terminal pins (22) are; formed by the punched wiring (9) and are bent vertically upwards.
13. Electro-dynamic transducer as set forth in claim 12; characterizing: in; that the housing (11) is provided with two chambers (21) on its bottom side, in which the terminal pins project.
EP80103889A 1979-07-11 1980-07-08 Electrodynamic transducer, in particular for telephonic apparatus Expired EP0022544B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80103889T ATE1836T1 (en) 1979-07-11 1980-07-08 ELECTRODYNAMIC CONVERTER, PARTICULARLY FOR TELEPHONE SETS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2927925 1979-07-11
DE2927925A DE2927925C2 (en) 1979-07-11 1979-07-11 Electrodynamic converter, in particular for telephone sets

Publications (2)

Publication Number Publication Date
EP0022544A1 EP0022544A1 (en) 1981-01-21
EP0022544B1 true EP0022544B1 (en) 1982-11-17

Family

ID=6075394

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80103889A Expired EP0022544B1 (en) 1979-07-11 1980-07-08 Electrodynamic transducer, in particular for telephonic apparatus

Country Status (3)

Country Link
EP (1) EP0022544B1 (en)
AT (1) ATE1836T1 (en)
DE (1) DE2927925C2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2929432C2 (en) * 1979-07-20 1981-08-13 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Method of manufacturing an electrodynamic transducer
DE3213819A1 (en) * 1982-04-15 1983-10-27 Standard Elektrik Lorenz Ag, 7000 Stuttgart Microphone capsule for telephone sets
ATE460052T1 (en) * 2002-07-31 2010-03-15 Nxp Bv ELECTROACOUSTIC TRANSDUCER WITH TRANSDUCER CIRCUIT

Family Cites Families (6)

* 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
DE1106809B (en) * 1959-11-28 1961-05-18 Heinrich Peiker Electrodynamic sound transducer
NL302559A (en) * 1963-01-25
US3230319A (en) * 1963-05-24 1966-01-18 Plastic Mold & Engineering Co Dynamic ear phone
DE2032051C2 (en) * 1970-06-29 1979-03-08 Standard Electrik Lorenz Ag, 7000 Stuttgart Electrodynamic converter
DE7830908U1 (en) * 1978-10-17 1979-02-01 Siemens Ag, 1000 Berlin Und 8000 Muenchen ELECTROACOUSTIC CONVERTER

Also Published As

Publication number Publication date
EP0022544A1 (en) 1981-01-21
ATE1836T1 (en) 1982-12-15
DE2927925A1 (en) 1981-01-22
DE2927925C2 (en) 1983-01-20

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