EP3198889A1 - Electrodynamic sound transducer - Google Patents

Electrodynamic sound transducer

Info

Publication number
EP3198889A1
EP3198889A1 EP15770884.3A EP15770884A EP3198889A1 EP 3198889 A1 EP3198889 A1 EP 3198889A1 EP 15770884 A EP15770884 A EP 15770884A EP 3198889 A1 EP3198889 A1 EP 3198889A1
Authority
EP
European Patent Office
Prior art keywords
membrane
chassis
diaphragm
transducer according
electrodynamic transducer
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.)
Granted
Application number
EP15770884.3A
Other languages
German (de)
French (fr)
Other versions
EP3198889B1 (en
Inventor
Heinz Epping
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.)
Sennheiser Electronic GmbH and Co KG
Original Assignee
Sennheiser Electronic GmbH and Co KG
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 Sennheiser Electronic GmbH and Co KG filed Critical Sennheiser Electronic GmbH and Co KG
Publication of EP3198889A1 publication Critical patent/EP3198889A1/en
Application granted granted Critical
Publication of EP3198889B1 publication Critical patent/EP3198889B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
    • 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
    • H04R9/08—Microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2231/00—Details of apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor covered by H04R31/00, not provided for in its subgroups
    • H04R2231/003—Manufacturing aspects of the outer suspension of loudspeaker or microphone diaphragms or of their connecting aspects to said diaphragms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00—Loudspeakers
    • H04R2400/11—Aspects regarding the frame of loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/127—Non-planar diaphragms or cones dome-shaped

Definitions

  • the present invention relates to an electrodynamic sound transducer and to a method for producing an electrodynamic sound transducer.
  • Electrodynamic transducers are well known and have a vibratable diaphragm to which a voice coil is coupled and a magnet system. Electrodynamic transducers can be used as microphones or playback transducers.
  • the diaphragm of the electrodynamic transducers are typically round in shape and have an annular voice coil which is coupled to the diaphragm and thus can oscillate together with the diaphragm.
  • the outer edge of the diaphragm is typically coupled to a housing or chassis of the playback transducer to provide a circular and vibratable diaphragm.
  • German Patent and Trademark Office cited the following documents: US 2010/0235849 A1, US 8,542,861 B2, US 2014/0205135 A1, US 2014/0153750 A1, WO 2006/038176 A1, DE 10 2008 059 312 A1, JP 2004-120517 A, DE 503 827 A, EP 0 772 373 A2.
  • an electrodynamic transducer is provided with a chassis and at least one oscillatable diaphragm.
  • the oscillatable membrane has at its edge at least two opposing mounting portions for attaching the membrane to the chassis.
  • the fastening sections can be designed in the manner of a circle segment. Between the attachment sections, the edge of the diaphragm is not connected to the chassis so that the diaphragm can vibrate freely at these locations.
  • the membrane further has a central portion immediately between the two attachment portions, which may be configured rectangular.
  • the two Vietnamesesegm entförmigen mounting portions 110 are defined by a circle having a diameter 100b, a center M and a nikraumraumde straight 100a.
  • the middle section 130 has two straight lines 105 which are arranged parallel to the circle-oddating straight line 100a.
  • the membrane thus preferably has a stadium-shaped form.
  • an embodiment of the membrane can be obtained by cutting two circular segments off or from a circular membrane.
  • the length of the membrane is greater than the width of the membrane.
  • the membrane is limited in this case at its edge by two opposite ends, which can oscillate freely with respect to the chassis, and by two opposite circular segment-shaped ends.
  • the circular segment-shaped ends serve as attachment sections, i. the membrane is attached to the chassis of the electrodynamic transducer via the circular segment-shaped mounting portions.
  • the rectangular middle section between the two attachment sections is not attached to the chassis and thus can swing freely.
  • a circular voice coil can be attached to the diaphragm which can oscillate with the diaphragm.
  • the electrodynamic transducer may further comprise a magnet system which can cooperate with the voice coil.
  • the membrane can be designed embossed.
  • a circle segment is a partial area of a circular area bounded by a circular arc and a chord.
  • the membrane may have at least one bead and a central dome area.
  • the membrane may be at its longitudinal sides, i. move the straight sides freely so that there is no contact between the chassis and the middle portion of the diaphragm.
  • damping units may be provided which are adapted to the shape of the membrane.
  • the invention also relates to a method for producing an electrodynamic transducer.
  • the electrodynamic converter has a stadium-shaped membrane.
  • This membrane is made from a circular membrane, with two opposite circular sections cut off or cut out.
  • This will be a Membrane obtained, which has two circular segment-shaped ends and two parallel straight sections.
  • the two parallel straight sections are parallel to a straight line through the center of the circular diaphragm (ie, parallel to the circular half-beam). This results in a shape reminiscent of a 400 meter track, hence the term stadium-shaped.
  • FIG. 1A-1C respectively show different schematic views of a membrane according to the invention for an electrodynamic transducer according to a first embodiment
  • FIGS. 2A-2D each show a schematic view of an electrodynamic
  • FIG. 3 shows a schematic illustration of an electrodynamic sound transducer according to a third exemplary embodiment
  • FIG. 4A shows various views of an electrodynamic sound and 4B converter according to a further embodiment of the invention.
  • FIG. 5 shows a schematic illustration of an electrodynamic sound transducer according to a fifth exemplary embodiment.
  • FIG. 1A-1C respectively show different schematic views of a membrane according to the invention for an electrodynamic transducer according to a first embodiment.
  • Fig. 1A is a plan view of a membrane according to the invention is shown.
  • the steps for producing the membrane according to the invention are shown schematically in FIG. 1A.
  • the inventive membrane 100 is originally a conventional circular membrane 100 having a radius r, a midpoint M, and a straight line 100a through the midpoint M (ie, a circular bisector).
  • two circle segments 120 are cut off or cut out so that two sides of the membrane now represent a straight line 105.
  • a circle segment is a partial surface of a circular area bounded by a circular arc and a chord.
  • the two straight lines 105 are parallel to the circle-odd line 100a.
  • the membrane 100 has a length 100b which corresponds to the diameter of the membrane 100. After the two circle segments 120 have been removed, the membrane 100 has a width 100c which is smaller than the length 100b or the diameter of the originally circular membrane 100.
  • the straight sections 105 of the (originally circular) membrane 100 are parallel to the circle-oddizing line 100a, which passes through the center M of the (originally circular) membrane.
  • a membrane 100 can thus be obtained, which has a stadium-shaped form.
  • the membrane 100 thus has two circular segment-shaped sections 110 and a middle section 130 therebetween, which is designed rectangular.
  • the two circular segment-shaped sections 110 are delimited by a circular arc 101a and a circular chord 101b.
  • the central portion 130 is bounded by the chords 101 b and the straight line 105 extending between the chords 10 b.
  • the straight lines 105 are parallel to the circle-bisecting line 100a.
  • the membrane is fixed by means of the circular segment-shaped sections 10 in or on an electrodynamic reproduction transducer and in particular a chassis of the transducer.
  • the circle segments 110 serve as attachment portions 110.
  • the central rectangular portion 130 is not attached to the chassis of a display of the reproducing transducer and thus can swing freely.
  • the membrane 100 may have a bead 103 and a cap 104.
  • the membrane may further include a portion 102 (i.e., a coil seat) for attaching a toroidal coil.
  • a compliance of the membrane is produced by a bead 103 of the membrane.
  • the region of the dome 104 is preferably a central region and the dome region is at least partially spherical in shape.
  • the dome area can also be reinforced by the coil seat and the voice coil. Since the longitudinal sides or straight lines 05 of the membrane are not fastened to the chassis, the membrane can oscillate freely there.
  • the membrane 100 is attached to the two circular segment-shaped sections 110 on a chassis of the transducer.
  • the membrane of the invention according to the first embodiment has a much lower of the fundamental resonance fre- As a conventional membrane shown above in Fig. 1A.
  • the membrane shown at the top of FIG. 1A may have a fundamental resonance at 557 Hz, while the fundamental resonance of the membrane of the present invention is at 369 Hz.
  • the membrane according to the invention can thus enable a reduction in the fundamental resonance to 67%.
  • the membrane according to the invention is advantageous with respect to the tumbling modes. While the membrane shown in Fig.
  • the membrane of the invention has a tumble mode at 423 Hz and at 764 Hz. While in the membrane according to the prior art, the two above-mentioned tumbling modes are quite close to each other, the two tumbling modes in the membrane according to the invention are further apart, resulting in a total of a smaller tendency to tumble.
  • the ratio of the effective area to the total area of the membrane in the membrane according to the invention is greater than in a conventional membrane (upper membrane in Fig. 1 B). In the same degree as the total area, the moving mass of the membrane is reduced by the inventive design.
  • Fig. 1C above three conventional membranes 100a are shown side by side and below five membranes 100 according to the invention.
  • the effective area of the diaphragms becomes larger with respect to the space.
  • FIG. 2A-2D show various views of an electrodynamic transducer according to a second embodiment.
  • Fig. 2A an exploded view of the electrodynamic transducer according to the invention is shown.
  • a diaphragm 00, a magnet system 300 and a chassis 400 are shown.
  • the membrane 100 according to the second embodiment may correspond to the membrane according to the first embodiment or may also be based on this membrane 100.
  • a voice coil 500 is attached to the diaphragm 100.
  • FIG. 2B shows a further view of the electrodynamic transducer according to the invention.
  • the membrane 100 has two circular segment-shaped fastening sections 110 and two straight sides or sections 105.
  • the voice coil 500 is attached to the leads 510.
  • the magnet system 300 is inserted into the chassis 400 and then the membrane 100 with the circular segment-shaped Fixing portions 110 attached to a mounting portion 410 of the chassis 400, so that the voice coil 500 is disposed in the magnet system 300.
  • the chassis 400 is equipped with two side walls 420 which correspond in shape to the freely oscillating edge portions 105 of the membrane, ie the two side walls 420 are straight.
  • FIG. 2C shows a plan view of the electrodynamic transducer according to the second embodiment.
  • a gap 440 is provided between the straight portions 105 of the diaphragm and the straight portions 420 of the chassis 400 so that the diaphragm 100 does not contact the chassis 400.
  • the side walls 420 have a height 421.
  • the sidewall 420 projects beyond the diaphragm both upwardly and downwardly.
  • the side wall 420 is higher than the diaphragm 100.
  • the side walls 420 are configured such that the gap 440 retains its size during the deflections occurring during operation.
  • the gap 440 is chosen to be as small as possible in order to avoid an acoustic short circuit, in which the air could pass from the front side of the membrane through the gap 440 on the rear side of the membrane.
  • the side walls 420 are configured both straight and vertical.
  • the width of the gap is for this purpose preferably less than 10% of the diameter of the coil 500.
  • Fig. 2D two additional damping units 610, 620 are provided, which can be arranged on the top and bottom of the chassis in order to provide an acoustic damping can.
  • the shape of the damping units 610, 620 is adapted to the shape of the membrane 100.
  • FIG. 3 shows a schematic illustration of an electrodynamic sound transducer according to a third exemplary embodiment.
  • the electroacoustic transducer according to the third embodiment has a stage-shaped diaphragm 100, a magnet system 300 and a chassis 400, which are adapted to the stage shape of the diaphragm.
  • the magnet system 300 may have two axially magnetized rings 310. In the gap between the two rings, the coil 500 can be placed.
  • 4A and 4B show various views of an electrodynamic transducer according to another embodiment of the invention.
  • an electrodynamic converter according to a fourth embodiment is shown.
  • the converter has a chassis 400 with two circular segment-shaped sections 410 and two straight sections 420.
  • the membrane 100 has two circular segment-shaped sections 110 and a rectangular section therebetween with two straight sides 105.
  • FIG. 4B shows a schematic sectional view.
  • the membrane may have characteristics 150.
  • the coil may, for example, be designed as a copper coil.
  • 5 shows a schematic illustration of a plan view of an electrodynamic sound transducer according to a fifth exemplary embodiment.
  • the diaphragm 1100 is not produced by trimming a conventional round diaphragm, but here another shape is provided.
  • An annular coil 1500 is provided on the membrane 100. Inside the coil 1500, the membrane 1100 is designed as a dome 1104. The outside area is designed as a bead 1103.
  • the chassis 1400 is equipped with two opposing side walls 1420.
  • the membrane 100 is secured to the chassis 1400 at its edge 1101 at two opposite ends 1410.
  • the diaphragm 1100 has at its edge two opposite edge portions 1105 where it is not attached to the chassis 1400 so that these portions 1105 can swing freely with respect to the chassis 1400. Between the edge portions 1105 and the sidewalls 1420 there is provided a narrow gap whose width is less than 10% of the diameter of the coil 1500. The distance between the two opposite mounting ends 1410 of the diaphragm is greater than the diameter of the coil 1500 in any direction.

Abstract

The invention relates to an electrodynamic sound transducer comprising a chassis (400, 1400) and at least one vibrating membrane (100, 1100), which comprises, on the edge thereof (1101), at least two securing sections (1101) which are opposite each other and which secure the membrane (100, 1100) to the chassis (400, 1400). Between the securing sections (1101), the edge (1105) of the membrane (100, 1100) is not connected to the chassis (400, 1400) allowing the membrane (100, 1100) to freely vibrate on said points.

Description

Elektrodynamischer Schallwandler  Electrodynamic transducer
Die vorliegende Erfindung betrifft einen elektrodynamischen Schallwandler sowie ein Verfahren zum Herstellen eines elektrodynamischen Schallwandlers. The present invention relates to an electrodynamic sound transducer and to a method for producing an electrodynamic sound transducer.
Elektrodynamische Schallwandler sind hinlänglich bekannt und weisen eine schwingfähige Membran, mit der eine Schwingspule gekoppelt ist, und ein Magnetsystem auf. Elektrodynamische Schallwandler können als Mikrofone oder Wiedergabewandler verwendet werden. Die Membran der elektrodynamischen Schallwandler sind typischerweise rund ausgestaltet und weisen eine ringförmige Schwingspule auf, welche mit der Membran gekoppelt ist und somit zusammen mit der Membran schwingen kann. Electrodynamic transducers are well known and have a vibratable diaphragm to which a voice coil is coupled and a magnet system. Electrodynamic transducers can be used as microphones or playback transducers. The diaphragm of the electrodynamic transducers are typically round in shape and have an annular voice coil which is coupled to the diaphragm and thus can oscillate together with the diaphragm.
Der äußere Rand der Membran ist typischerweise mit einem Gehäuse oder Chassis des Wiedergabewandlers gekoppelt, so dass eine kreisförmige und schwingfähige Membran erhalten wird. The outer edge of the diaphragm is typically coupled to a housing or chassis of the playback transducer to provide a circular and vibratable diaphragm.
In der prioritätsbegründenden deutschen Patentanmeldung hat das Deutsche Patent- und Markenamt die folgenden Dokumente zitiert: US 2010/0235849 A1 , US 8,542,861 B2, US 2014/0205135 A1 , US 2014/0153750 A1 , WO 2006/038176 A1 , DE 10 2008 059 312 A1 , JP 2004-120517 A, DE 503 827 A, EP 0 772 373 A2. In the priority German patent application, the German Patent and Trademark Office cited the following documents: US 2010/0235849 A1, US 8,542,861 B2, US 2014/0205135 A1, US 2014/0153750 A1, WO 2006/038176 A1, DE 10 2008 059 312 A1, JP 2004-120517 A, DE 503 827 A, EP 0 772 373 A2.
Es ist eine Aufgabe der vorliegenden Erfindung, einen elektrodynamischen Schallwandler vorzusehen, welcher ein verbessertes breitbandiges Übertragungsverhalten aufweist. It is an object of the present invention to provide an electrodynamic sound transducer having an improved broadband transmission response.
Diese Aufgabe wird durch einen elektroakustischen Schallwandler nach Anspruch 1 sowie durch ein Verfahren zum Herstellen eines elektrodynamischen Schallwandlers gemäß Anspruch 7 gelöst. This object is achieved by an electroacoustic transducer according to claim 1 and by a method for producing an electrodynamic transducer according to claim 7.
Somit wird ein elektrodynamischer Schallwandler mit einem Chassis und mindestens einer schwingfähigen Membran vorgesehen. Die schwingfähige Membran weist an ihrem Rand mindestens zwei sich gegenüberliegende Befestigungsabschnitte zur Befestigung der Membran an dem Chassis auf. Die Befestigungsabschnitte können kreissegmentför- mig ausgestaltet sein. Zwischen den Befestigungsabschnitten ist der Rand der Membran nicht mit dem Chassis verbunden, sodass die Membran an diesen Stellen frei schwingen kann. Die Membran weist ferner einen mittleren Abschnitt unmittelbar zwischen den zwei Befestigungsabschnitten auf, der rechteckig ausgestaltet sein kann. Die zwei kreissegm entförmigen Befestigungsabschnitte 110 sind durch einen Kreis definiert, der einen Durchmesser 100b, einen Mittelpunkt M und eine kreishalbierende Gerade 100a aufweist. Der mittlere Abschnitt 130 weist zwei Geraden 105 auf, die parallel zu der kreishalbierenden Geraden 100a angeordnet sind. Thus, an electrodynamic transducer is provided with a chassis and at least one oscillatable diaphragm. The oscillatable membrane has at its edge at least two opposing mounting portions for attaching the membrane to the chassis. The fastening sections can be designed in the manner of a circle segment. Between the attachment sections, the edge of the diaphragm is not connected to the chassis so that the diaphragm can vibrate freely at these locations. The membrane further has a central portion immediately between the two attachment portions, which may be configured rectangular. The two kreissegm entförmigen mounting portions 110 are defined by a circle having a diameter 100b, a center M and a kreishalbierende straight 100a. The middle section 130 has two straight lines 105 which are arranged parallel to the circle-oddating straight line 100a.
Die Membran weist somit vorzugsweise eine stadiumförmige Form auf. Mit anderen Worten kann eine Ausführungsform der Membran erhalten werden, indem zwei Kreissegmente aus bzw. von einer kreisförmigen Membran ab- bzw. ausgeschnitten werden. Damit ist die Länge der Membran größer als die Breite der Membran. Die Membran wird in diesem Fall an ihrem Rand durch zwei sich gegenüberliegende Enden begrenzt, die bezüglich dem Chassis frei schwingen können, sowie durch zwei sich gegenüberliegende kreissegmentförmige Enden. Die kreissegmentförmigen Enden dienen als Befestigungsabschnitte, d.h. die Membran wird über die kreissegmentförmigen Befestigungsabschnitte an dem Chassis des elektrodynamischen Schallwandlers befestigt. Damit ist der recht- eckige mittlere Abschnitt zwischen den beiden Befestigungsabschnitten nicht an dem Chassis befestigt und kann somit frei schwingen. The membrane thus preferably has a stadium-shaped form. In other words, an embodiment of the membrane can be obtained by cutting two circular segments off or from a circular membrane. Thus, the length of the membrane is greater than the width of the membrane. The membrane is limited in this case at its edge by two opposite ends, which can oscillate freely with respect to the chassis, and by two opposite circular segment-shaped ends. The circular segment-shaped ends serve as attachment sections, i. the membrane is attached to the chassis of the electrodynamic transducer via the circular segment-shaped mounting portions. Thus, the rectangular middle section between the two attachment sections is not attached to the chassis and thus can swing freely.
An der Membran kann eine kreisförmige Schwingspule befestigt sein, welche mit der Membran schwingen kann. Der elektrodynamische Schallwandler kann ferner ein Magnetsystem aufweisen, welches mit der Schwingspule zusammenarbeiten kann. Optional kann die Membran geprägt ausgestaltet sein. A circular voice coil can be attached to the diaphragm which can oscillate with the diaphragm. The electrodynamic transducer may further comprise a magnet system which can cooperate with the voice coil. Optionally, the membrane can be designed embossed.
Gemäß der Erfindung ist ein Kreissegment eine Teilfläche einer Kreisfläche, welche von einem Kreisbogen und einer Kreissehne begrenzt wird. According to the invention, a circle segment is a partial area of a circular area bounded by a circular arc and a chord.
Optional kann die Membran mindestens eine Sicke sowie einen zentralen Kalottenbereich aufweisen. Die Membran kann sich an ihren Längsseiten, d.h. den geraden Seiten frei bewegen, so dass keine Berührung zwischen dem Chassis und dem mittleren Abschnitt der Membran vorhanden sind. Optionally, the membrane may have at least one bead and a central dome area. The membrane may be at its longitudinal sides, i. move the straight sides freely so that there is no contact between the chassis and the middle portion of the diaphragm.
Gemäß einem Aspekt der vorliegenden Erfindung, können Dämpfungseinheiten vorgesehen sein, welche an die Form der Membran angepasst sind. According to one aspect of the present invention, damping units may be provided which are adapted to the shape of the membrane.
Die Erfindung betrifft ebenfalls ein Verfahren zum Herstellen eines elektrodynamischen Wandlers. Hierbei weist der elektrodynamische Wandler eine stadiumförmige Membran auf. Diese Membran wird aus einer kreisförmigen Membran hergestellt, wobei zwei gegenüberliegende Kreisabschnitte ab- bzw. ausgeschnitten werden. Damit wird eine Membran erhalten, welche zwei kreissegmentförmige Enden sowie zwei parallele gerade Abschnitte aufweist. Die beiden parallelen geraden Abschnitte sind parallel zu einer Geraden durch den Mittelpunkt der kreisförmigen Membran (d.h. parallel zu der Kreishalbierenden). Damit ergibt sich eine Form, welche an eine 400 Meter Bahn erinnert, daher der Begriff stadiumförmig. The invention also relates to a method for producing an electrodynamic transducer. Here, the electrodynamic converter has a stadium-shaped membrane. This membrane is made from a circular membrane, with two opposite circular sections cut off or cut out. This will be a Membrane obtained, which has two circular segment-shaped ends and two parallel straight sections. The two parallel straight sections are parallel to a straight line through the center of the circular diaphragm (ie, parallel to the circular half-beam). This results in a shape reminiscent of a 400 meter track, hence the term stadium-shaped.
Weitere Ausgestaltungen der Erfindung sind der Gegenstand der Unteransprüche. Further embodiments of the invention are the subject of the dependent claims.
Vorteile und Ausführungsbeispiele der Erfindung sind nachstehend unter Bezugnahme auf die Zeichnungen näher erläutert. Advantages and embodiments of the invention are explained below with reference to the drawings.
Fig. 1A-1C zeigen jeweils verschiedene schematische Ansichten einer erfindungsgemäßen Membran für einen elektrodynamischen Wandler gemäß einem ersten Ausführungsbeispiel, 1A-1C respectively show different schematic views of a membrane according to the invention for an electrodynamic transducer according to a first embodiment,
Fig. 2A-2D zeigen jeweils eine schematische Ansicht eines elektrodynamischen  FIGS. 2A-2D each show a schematic view of an electrodynamic
Wandlers gemäß einem zweiten Ausführungsbeispiel, Converter according to a second embodiment,
Fig. 3 zeigt eine schematische Veranschaulichung eines elektrodynamischen Schallwandlers gemäß einem dritten Ausführungsbeispiel,3 shows a schematic illustration of an electrodynamic sound transducer according to a third exemplary embodiment,
Fig. 4A zeigen verschiedene Ansichten eines elektrodynamischen Schall- und 4B wandlers gemäß einem weiteren Ausführungsbeispiel der Erfindung, und 4A shows various views of an electrodynamic sound and 4B converter according to a further embodiment of the invention, and
Fig. 5 zeigt eine schematische Veranschaulichung eines elektrodynamischen Schallwandlers gemäß einem fünften Ausführungsbeispiel.  5 shows a schematic illustration of an electrodynamic sound transducer according to a fifth exemplary embodiment.
Fig. 1A-1C zeigen jeweils verschiedene schematische Ansichten einer erfindungsgemäßen Membran für einen elektrodynamischen Wandler gemäß einem ersten Ausführungsbeispiel. In Fig. 1A ist eine Draufsicht auf eine erfindungsgemäße Membran gezeigt. Insbesondere sind in Fig. 1A die Schritte zur Herstellung der erfindungsgemäßen Membran schematisch dargestellt. Die erfindungsgemäße Membran 100 ist ursprünglich eine herkömmliche kreisförmige Membran 100 mit einem Radius r, einen Mittelpunkt M und einer Geraden 100a durch den Mittelpunkt M (d.h. eine Kreishalbierende). Anschließend werden zwei Kreissegmente 120 ab- oder ausgeschnitten, so dass zwei Seiten der Membran nunmehr eine Gerade 105 darstellen. Gemäß der Erfindung ist ein Kreissegment eine Teilfläche einer Kreisfläche, die von einem Kreisbogen und einer Kreissehne begrenzt wird. Die beiden Geraden 105 sind parallel zu der kreishalbierenden Gerade 100a. Die Membran 100 weist eine Länge 100b auf, welche den Durchmesser der Membran 100 entspricht. Nachdem die beiden Kreissegmente 120 entfernt worden sind, weist die Membran 100 eine Breite 100c auf, welche kleiner ist als die Länge 100b bzw. der Durchmes- ser der ursprünglich kreisförmigen Membran 100. Die geraden Abschnitte 105 der (ursprünglich kreisförmigen) Membran 100 sind parallel zu der kreishalbierenden Gerade 100a, welche durch den Mittelpunkt M der (ursprünglich kreisförmigen) Membran verläuft. 1A-1C respectively show different schematic views of a membrane according to the invention for an electrodynamic transducer according to a first embodiment. In Fig. 1A is a plan view of a membrane according to the invention is shown. In particular, the steps for producing the membrane according to the invention are shown schematically in FIG. 1A. The inventive membrane 100 is originally a conventional circular membrane 100 having a radius r, a midpoint M, and a straight line 100a through the midpoint M (ie, a circular bisector). Subsequently, two circle segments 120 are cut off or cut out so that two sides of the membrane now represent a straight line 105. According to the invention, a circle segment is a partial surface of a circular area bounded by a circular arc and a chord. The two straight lines 105 are parallel to the circle-odd line 100a. The membrane 100 has a length 100b which corresponds to the diameter of the membrane 100. After the two circle segments 120 have been removed, the membrane 100 has a width 100c which is smaller than the length 100b or the diameter of the originally circular membrane 100. The straight sections 105 of the (originally circular) membrane 100 are parallel to the circle-oddizing line 100a, which passes through the center M of the (originally circular) membrane.
Gemäß der Erfindung kann somit eine Membran 100 erhalten werden, welche stadium- förmige Form aufweist. Die Membran 100 weist somit zwei kreissegmentförmige Ab- schnitte 110 sowie einen mittleren Abschnitt 130 dazwischen auf, welcher rechteckig ausgestaltet ist. Die beiden kreissegmentförmigen Abschnitte 110 werden durch einen Kreisbogen 101a und eine Kreissehne 101 b begrenzt. Der mittlere Abschnitt 130 wird durch die Kreissehnen 101 b und die Geraden 105, welche sich zwischen den Kreissehnen 10 b erstrecken, begrenzt. Die Geraden 105 sind parallel zu der kreishalbierenden Gerade 100a. Gemäß der Erfindung wird die Membran mittels der kreissegmentförmigen Abschnitte 10 in bzw. an einem elektrodynamischen Wiedergabewandler und insbesondere einem Chassis des Wandlers befestigt. Damit dienen die Kreissegmente 110 als Befestigungsabschnitte 110. Der mittlere rechteckige Abschnitt 130 ist nicht an dem Chassis bzw. einem Gehäuse des Wiedergabewandlers befestigt und kann somit frei schwingen. Die Membran 100 kann eine Sicke 103 und eine Kalotte 104 aufweisen. Die Membran kann ferner einen Abschnitt 102 (d.h. einen Spulensitz) zur Befestigung einer Ringspule aufweisen. According to the invention, a membrane 100 can thus be obtained, which has a stadium-shaped form. The membrane 100 thus has two circular segment-shaped sections 110 and a middle section 130 therebetween, which is designed rectangular. The two circular segment-shaped sections 110 are delimited by a circular arc 101a and a circular chord 101b. The central portion 130 is bounded by the chords 101 b and the straight line 105 extending between the chords 10 b. The straight lines 105 are parallel to the circle-bisecting line 100a. According to the invention, the membrane is fixed by means of the circular segment-shaped sections 10 in or on an electrodynamic reproduction transducer and in particular a chassis of the transducer. Thus, the circle segments 110 serve as attachment portions 110. The central rectangular portion 130 is not attached to the chassis of a display of the reproducing transducer and thus can swing freely. The membrane 100 may have a bead 103 and a cap 104. The membrane may further include a portion 102 (i.e., a coil seat) for attaching a toroidal coil.
Bei der Membran gemäß dem ersten Ausführungsbeispiel wird eine Nachgiebigkeit der Membran durch eine Sicke 103 der Membran erzeugt. Der Bereich der Kalotte 104 ist vorzugsweise ein zentraler Bereich und der Kalottenbereich ist zumindest abschnittsweise kugelförmig ausgestaltet. Der Kalottenbereich kann ferner durch den Spulensitz sowie die Schwingspule verstärkt werden. Da die Längsseiten oder Geraden 05 der Membran nicht an dem Chassis befestigt sind, kann die Membran dort frei schwingen. In the membrane according to the first embodiment, a compliance of the membrane is produced by a bead 103 of the membrane. The region of the dome 104 is preferably a central region and the dome region is at least partially spherical in shape. The dome area can also be reinforced by the coil seat and the voice coil. Since the longitudinal sides or straight lines 05 of the membrane are not fastened to the chassis, the membrane can oscillate freely there.
Die Membran 100 ist an den beiden kreissegmentförmigen Abschnitten 110 an einem Chassis des Wandlers befestigt. The membrane 100 is attached to the two circular segment-shaped sections 110 on a chassis of the transducer.
Durch die erfindungsgemäße Ausgestaltung der Membran kann eine drastische Reduzierung der Resonanzfrequenz erreicht werden. Die erfindungsgemäße Membran gemäß dem ersten Ausführungsbeispiel weist eine deutlich niedrigere der Grundresonanzfre- quenz als eine oben in Fig. 1A gezeigte herkömmliche Membran auf. Die oben in Fig. 1A gezeigte Membran kann bspw. eine Grundresonanz bei 557 Hz aufweisen, während die Grundresonanz der erfindungsgemäßen Membran bei 369 Hz vorhanden ist. In diesem Beispiel kann die erfindungsgemäße Membran also eine Reduzierung der Grundreso- nanz auf 67 % ermöglichen. Ferner ist die erfindungsgemäße Membran vorteilhaft hinsichtlich der Taumelmoden. Während die in Fig. 1A oben gezeigte Membran eine Taumelmode bei 878 Hz und 879 Hz aufweist, weist die erfindungsgemäße Membran eine Taumelmode bei 423 Hz sowie bei 764 Hz auf. Während bei der Membran gemäß dem Stand der Technik die beiden o.g. Taumelmoden recht nah beieinander sind, sind die beiden Taumelmoden bei der erfindungsgemäßen Membran weiter auseinander, wodurch sich insgesamt eine geringere Taumelneigung ergibt. Due to the inventive design of the membrane, a drastic reduction of the resonance frequency can be achieved. The membrane of the invention according to the first embodiment has a much lower of the fundamental resonance fre- As a conventional membrane shown above in Fig. 1A. For example, the membrane shown at the top of FIG. 1A may have a fundamental resonance at 557 Hz, while the fundamental resonance of the membrane of the present invention is at 369 Hz. In this example, the membrane according to the invention can thus enable a reduction in the fundamental resonance to 67%. Furthermore, the membrane according to the invention is advantageous with respect to the tumbling modes. While the membrane shown in Fig. 1A above has a tumble mode at 878 Hz and 879 Hz, the membrane of the invention has a tumble mode at 423 Hz and at 764 Hz. While in the membrane according to the prior art, the two above-mentioned tumbling modes are quite close to each other, the two tumbling modes in the membrane according to the invention are further apart, resulting in a total of a smaller tendency to tumble.
Wie aus Fig. 1 B zu sehen, ist das Verhältnis der effektiven Fläche zur Gesamtfläche der Membran bei der erfindungsgemäßen Membran größer als bei einer herkömmlichen Membran (obere Membran in Fig. 1 B). Im gleichen Maß wie die Gesamtfläche reduziert sich auch die bewegte Masse der Membran durch die erfindungsgemäße Ausgestaltung. As can be seen from Fig. 1 B, the ratio of the effective area to the total area of the membrane in the membrane according to the invention is greater than in a conventional membrane (upper membrane in Fig. 1 B). In the same degree as the total area, the moving mass of the membrane is reduced by the inventive design.
In Fig. 1C sind oben drei herkömmliche Membranen 100a nebeneinander und unten fünf Membranen 100 gemäß der Erfindung dargestellt. Dadurch dass die Breite 100c der erfindungsgemäßen Membranen geringer ist als die Länge 100b der Membranen (d.h. der Durchmesser), können mehr Membranen auf der gleiche Breite untergebracht wer- den können. Somit wird die effektive Fläche der Membranen in Bezug auf den Bauraum größer. In Fig. 1C above three conventional membranes 100a are shown side by side and below five membranes 100 according to the invention. The fact that the width 100c of the membranes according to the invention is less than the length 100b of the membranes (i.e., the diameter) allows more membranes to be accommodated at the same width. Thus, the effective area of the diaphragms becomes larger with respect to the space.
Fig. 2A-2D zeigen verschiedene Ansichten eines elektrodynamischen Wandlers gemäß einem zweiten Ausführungsbeispiel. In Fig. 2A ist eine Explosionszeichnung des erfindungsgemäßen elektrodynamischen Wandlers gezeigt. Hierbei sind eine Membran 00, ein Magnetsystem 300 und ein Chassis 400 gezeigt. Die Membran 100 gemäß dem zweiten Ausführungsbeispiel kann der Membran gemäß dem ersten Ausführungsbeispiel entsprechen bzw. kann auch auf dieser Membran 100 beruhen. Gemäß dem zweiten Ausführungsbeispiel ist eine Schwingspule 500 an der Membran 100 befestigt. 2A-2D show various views of an electrodynamic transducer according to a second embodiment. In Fig. 2A an exploded view of the electrodynamic transducer according to the invention is shown. Here, a diaphragm 00, a magnet system 300 and a chassis 400 are shown. The membrane 100 according to the second embodiment may correspond to the membrane according to the first embodiment or may also be based on this membrane 100. According to the second embodiment, a voice coil 500 is attached to the diaphragm 100.
In Fig. 2B ist eine weitere Ansicht des erfindungsgemäßen elektrodynamischen Wandlers gezeigt. Die Membran 100 weist zwei kreissegmentförmige Befestigungsabschnitte 110 sowie zwei gerade Seiten oder Abschnitte 105 auf. An der Membran 100 ist die Schwingspule 500 mit den Zuleitungen 510 befestigt. Das Magnetsystem 300 wird in das Chassis 400 eingesetzt und anschließend wird die Membran 100 mit den kreissegmentförmigen Befestigungsabschnitten 110 an einem Befestigungsabschnitt 410 des Chassis 400 befestigt, so dass die Schwingspule 500 in dem Magnetsystem 300 angeordnet ist. Das Chassis 400 ist mit zwei Seitenwänden 420 ausgestattet, die in ihrer Form den frei schwingenden Randabschnitten 105 der Membran entsprechen, d.h. die beiden Seiten- wände 420 sind gerade ausgestaltet. FIG. 2B shows a further view of the electrodynamic transducer according to the invention. The membrane 100 has two circular segment-shaped fastening sections 110 and two straight sides or sections 105. On the membrane 100, the voice coil 500 is attached to the leads 510. The magnet system 300 is inserted into the chassis 400 and then the membrane 100 with the circular segment-shaped Fixing portions 110 attached to a mounting portion 410 of the chassis 400, so that the voice coil 500 is disposed in the magnet system 300. The chassis 400 is equipped with two side walls 420 which correspond in shape to the freely oscillating edge portions 105 of the membrane, ie the two side walls 420 are straight.
Fig. 2C zeigt eine Draufsicht auf den elektrodynamischen Schallwandler gemäß dem zweiten Ausführungsbeispiel. Hierbei ist ein Spalt 440 zwischen den geraden Abschnitten 105 der Membran und den geraden Abschnitten 420 des Chassis 400 vorgesehen, so dass die Membran 100 das Chassis 400 nicht berührt. Die Seitenwände 420 weisen eine Höhe 421 auf. Im eingebauten Zustand der Membran 100 (d.h. wenn die Befestigungsabschnitte 110 der Membran an den Befestigungsabschnitten 410 des Chassis 400 befestigt sind) überragt die Seitenwand 420 die Membran sowohl nach oben als auch nach unten. Damit ist die Seitenwand 420 höher als die Membran 100. Die Seitenwände 420 sind so ausgestaltet, dass der Spalt 440 bei den im Betrieb vorkommenden Auslen- kungen seine Größe beibehält. Der Spalt 440 wird dabei möglichst klein gewählt, um einen akustischen Kurzschluss zu vermeiden, bei dem die Luft von der Vorderseite der Membran durch den Spalt 440 auf die Hinterseite der Membran gelangen könnte. Dadurch, dass die Seitenwände 420 die Membran 100 überragen, d.h., dadurch dass die Seitenwände 420 höher sind als die Membran 100, kann ein akustischer Kurzschluss besser vermieden werden. Die Seitenwände 420 sind sowohl gerade als auch senkrecht ausgestaltet. Die Breite des Spalts ist dazu vorzugsweise kleiner als 10% des Durchmessers der Spule 500. 2C shows a plan view of the electrodynamic transducer according to the second embodiment. Here, a gap 440 is provided between the straight portions 105 of the diaphragm and the straight portions 420 of the chassis 400 so that the diaphragm 100 does not contact the chassis 400. The side walls 420 have a height 421. When the diaphragm 100 is installed (i.e., when the mounting portions 110 of the diaphragm are attached to the mounting portions 410 of the chassis 400), the sidewall 420 projects beyond the diaphragm both upwardly and downwardly. Thus, the side wall 420 is higher than the diaphragm 100. The side walls 420 are configured such that the gap 440 retains its size during the deflections occurring during operation. The gap 440 is chosen to be as small as possible in order to avoid an acoustic short circuit, in which the air could pass from the front side of the membrane through the gap 440 on the rear side of the membrane. By having the sidewalls 420 project beyond the membrane 100, that is, by having the sidewalls 420 higher than the membrane 100, acoustic shorting can be better avoided. The side walls 420 are configured both straight and vertical. The width of the gap is for this purpose preferably less than 10% of the diameter of the coil 500.
In Fig. 2D sind zwei zusätzliche Dämpfungseinheiten 610, 620 vorgesehen, welche auf der Ober- und Unterseite des Chassis angeordnet werden können, um eine akustische Dämpfung vorsehen zu können. Die Form der Dämpfungseinheiten 610, 620 ist an die Form der Membran 100 angepasst. In Fig. 2D, two additional damping units 610, 620 are provided, which can be arranged on the top and bottom of the chassis in order to provide an acoustic damping can. The shape of the damping units 610, 620 is adapted to the shape of the membrane 100.
Fig. 3 zeigt eine schematische Veranschaulichung eines elektrodynamischen Schallwandlers gemäß einem dritten Ausführungsbeispiel. Der elektroakustische Wandler gemäß dem dritten Ausführungsbeispiel weist eine stadiumförmige Membran 100, ein Magnetsystem 300 und ein Chassis 400 auf, welche an die Stadiumform der Membran angepasst sind. Gemäß der Erfindung kann das Magnetsystem 300 zwei axial magneti- sierte Ringe 310 aufweisen. In dem Spalt zwischen den beiden Ringen kann die Spule 500 platziert werden. Fig. 4A und 4B zeigen verschiedene Ansichten eines elektrodynamischen Schallwandlers gemäß einem weiteren Ausführungsbeispiel der Erfindung. In Fig. 4 ist ein elektrodynamischer Wandler gemäß einem vierten Ausführungsbeispiel gezeigt. Der Wandler weist ein Chassis 400 mit zwei kreissegmentförmigen Abschnitten 410 und zwei geraden Abschnitten 420 auf. Die Membran 100 weist zwei kreissegmentförmige Abschnitte 110 sowie einen rechteckigen Abschnitt dazwischen mit zwei geraden Seiten 105 auf. 3 shows a schematic illustration of an electrodynamic sound transducer according to a third exemplary embodiment. The electroacoustic transducer according to the third embodiment has a stage-shaped diaphragm 100, a magnet system 300 and a chassis 400, which are adapted to the stage shape of the diaphragm. According to the invention, the magnet system 300 may have two axially magnetized rings 310. In the gap between the two rings, the coil 500 can be placed. 4A and 4B show various views of an electrodynamic transducer according to another embodiment of the invention. 4, an electrodynamic converter according to a fourth embodiment is shown. The converter has a chassis 400 with two circular segment-shaped sections 410 and two straight sections 420. The membrane 100 has two circular segment-shaped sections 110 and a rectangular section therebetween with two straight sides 105.
In Fig. 4B ist eine schematische Schnittansicht gezeigt. Gemäß dem vierten Ausführungsbeispiel kann die Membran Ausprägungen 150 aufweisen. Die Spule kann bspw. als Kupferspule ausgestaltet sein. Fig. 5 zeigt eine schematische Veranschaulichung einer Draufsicht auf einen elektrodynamischen Schallwandler gemäß einem fünften Ausführungsbeispiel. In dem fünften Ausführungsbeispiel ist die Membran 1100 nicht durch Beschneiden einer herkömmlichen runden Membran erzeugt, sondern hier ist eine andere Formgebung vorgesehen. An der Membran 100 ist eine ringförmige Spule 1500 vorgesehen. Im Inneren der Spule 1500 ist die Membran 1100 als Kalotte 1104 ausgestaltet. Der Außenbereich ist als Sicke 1103 ausgestaltet. Das Chassis 1400 ist mit zwei gegenüberliegenden Seitenwänden 1420 ausgestattet. Die Membran 100 ist an ihrem Rand 1101 an zwei gegenüberliegenden Enden 1410 an dem Chassis 1400 befestigt. Zwischen den Befestigungsenden 1410 bzw. den beiden Rändern 1101 hat die Membran 1100 an ihrem Rand zwei gegenüber- liegende Randabschnitte 1105, an denen sie nicht am Chassis 1400 befestigt ist, sodass diese Abschnitte 1105 bezüglich dem Chassis 1400 frei schwingen können. Zwischen den Randabschnitten 1105 und den Seitenwänden 1420 ist ein schmaler Spalt vorgesehen, dessen Breite kleiner ist als 10% des Durchmessers der Spule 1500. Der Abstand der beiden gegenüberliegenden Befestigungsenden 1410 der Membran ist in jede Rich- tung größer als der Durchmesser der Spule 1500. FIG. 4B shows a schematic sectional view. According to the fourth embodiment, the membrane may have characteristics 150. The coil may, for example, be designed as a copper coil. 5 shows a schematic illustration of a plan view of an electrodynamic sound transducer according to a fifth exemplary embodiment. In the fifth embodiment, the diaphragm 1100 is not produced by trimming a conventional round diaphragm, but here another shape is provided. An annular coil 1500 is provided on the membrane 100. Inside the coil 1500, the membrane 1100 is designed as a dome 1104. The outside area is designed as a bead 1103. The chassis 1400 is equipped with two opposing side walls 1420. The membrane 100 is secured to the chassis 1400 at its edge 1101 at two opposite ends 1410. Between the attachment ends 1410 and the two edges 1101, the diaphragm 1100 has at its edge two opposite edge portions 1105 where it is not attached to the chassis 1400 so that these portions 1105 can swing freely with respect to the chassis 1400. Between the edge portions 1105 and the sidewalls 1420 there is provided a narrow gap whose width is less than 10% of the diameter of the coil 1500. The distance between the two opposite mounting ends 1410 of the diaphragm is greater than the diameter of the coil 1500 in any direction.

Claims

Ansprüche claims
1. Elektrodynamischer Schallwandler, mit 1. Electrodynamic transducer, with
einem Chassis (400), und  a chassis (400), and
einer Membran (100) mit mindestens zwei kreissegmentförmigen Befestigungsabschnitten (110) zur Befestigung an dem Chassis (400) und einem mittleren rechteckför- migen Abschnitt (130) unmittelbar zwischen den zwei Befestigungsabschnitten (1 0), wobei die zwei kreissegmentförmigen Befestigungsabschnitte ( 0) durch einen Kreis definiert sind, der einen Durchmesser (100b), einen Mittelpunkt (M) und eine kreishalbierende Gerade (100a) aufweist,  a membrane (100) having at least two circular segment-shaped fastening sections (110) for fastening to the chassis (400) and a central rectangular section (130) immediately between the two fastening sections (10), wherein the two circular segment-shaped fastening sections (0) a circle is defined which has a diameter (100b), a center (M) and a circle-odd line (100a),
wobei der mittlere Abschnitt (130) zwei Geraden (105) aufweist, die parallel zu der kreishalbierenden Geraden (100a) angeordnet sind.  wherein the central portion (130) has two straight lines (105) arranged parallel to the circle-bisecting line (100a).
2 Elektrodynamischer Schallwandler nach Anspruch 1 , 2 electrodynamic transducer according to claim 1,
wobei eine Breite des rechteckförmigen Abschnitts ( 30) kleiner ist als der Durchmesser (100b) der Membran (100).  wherein a width of the rectangular portion (30) is smaller than the diameter (100b) of the diaphragm (100).
3. Elektroakustischer Schallwandler nach Anspruch 1 oder 2, mit 3. An electroacoustic transducer according to claim 1 or 2, with
einer Schwingspule (500), welche an der Membran (100) befestigt ist, so dass die Schwingspule (500) zusammen mit der Membran (100) schwingen kann. ???  a voice coil (500) attached to the diaphragm (100) so that the voice coil (500) can oscillate together with the diaphragm (100). ???
4. Elektroakustischer Schallwandler nach einem der Ansprüche 1 bis 3, wobei 4. An electroacoustic transducer according to any one of claims 1 to 3, wherein
das Chassis (400) zwei Befestigungsabschnitte (410) und zwei gerade Seitenwände (420) aufweist und das Chassis (400) an die Form der Membran (100) derart ange- passt ist, dass die Membran (100) nur an den kreissegmentförmigen Befestigungsabschnitten (110) befestigt ist und die Seitenwände (420) des Chassis (400) die Membran (100) nicht berühren und die Membran (100) überragen, so dass der mittlere Abschnitt (130) der Membran (100) frei schwingen kann.  the chassis (400) has two fastening sections (410) and two straight side walls (420), and the chassis (400) is adapted to the shape of the membrane (100) such that the membrane (100) acts only on the circular segment-shaped fastening sections (FIG. 110) and the sidewalls (420) of the chassis (400) do not contact the membrane (100) and overhang the membrane (100) so that the central portion (130) of the membrane (100) is free to oscillate.
5. Elektrodynamischer Schallwandler nach einem der Ansprüche 1 bis 4, wobei die Membran (100) zumindest abschnittsweise geprägt ausgestaltet ist. 5. Electrodynamic transducer according to one of claims 1 to 4, wherein the membrane (100) is designed at least partially embossed.
6. Elektrodynamischer Schallwandler, mit 6. Electrodynamic transducer, with
einem Chassis (400, 1400), und  a chassis (400, 1400), and
mindestens einer schwingfähigen Membran (100, 1100), die an ihrem Rand (1101 ) mindestens zwei sich gegenüberliegende Befestigungsabschnitte (1101 ) zur Befestigung der Membran (100, 1100) an dem Chassis (400, 1400) aufweist, wobei der Rand (1105) der Membran (100, 1100) zwischen den Befestigungsabschnitten (1101 ) nicht mit dem Chassis (400, 1400) verbunden ist, sodass die Membran (100, 1100) an diesen Stellen frei schwingen kann, at least one oscillatable membrane (100, 1100) having at its edge (1101) at least two opposing attachment portions (1101) for attaching the membrane (100, 1100) to the chassis (400, 1400), wherein the edge (1105) of the membrane (100, 1100) between the attachment portions (1101) is not connected to the chassis (400, 1400), so that the diaphragm (100, 1100) can swing freely at these locations,
wobei das Chassis (400, 1400) Seitenwände (420) aufweist, welche die Membran (100) überragen und die Membran nicht berühren.  wherein the chassis (400, 1400) has side walls (420) which project beyond the membrane (100) and do not touch the membrane.
7. Verfahren zum Herstellen eines elektrodynamischen Schallwandlers, der eine schwingfähige Membran aufweist, mit den Schritten: 7. A method of making an electrodynamic transducer having a vibratable diaphragm comprising the steps of:
Abschneiden oder Entfernen von zwei gegenüberliegenden Kreissegmenten aus einer kreisförmigen Membran.  Cutting or removing two opposite circle segments from a circular membrane.
8. Hörer mit 8. Listener with
einem elektrodynamischen Schallwandler nach einem der Ansprüche 1 bis 6 und 10 bis 14.  an electrodynamic transducer according to one of claims 1 to 6 and 10 to 14.
9. Mikrofon mit 9. Microphone with
einem elektrodynamischen Schallwandler nach einem der Ansprüche 1 bis 6 und 10 bis 14.  an electrodynamic transducer according to one of claims 1 to 6 and 10 to 14.
10. Elektrodynamischer Schallwandler, mit 10. Electrodynamic transducer, with
einem Chassis (1400) mit Seitenwänden (1420) und  a chassis (1400) with side walls (1420) and
einer Membran (1100), an der eine ringförmige Spule (1500) befestigt ist, wobei die Membran (1100) an ihrem Rand an mindestens zwei gegenüberliegen- den Befestigungsabschnitten (1101 ) an dem Chassis (1400) befestigt ist, und  a diaphragm (1100) to which is attached an annular coil (1500), the diaphragm (1100) being secured at its edge to at least two opposing mounting portions (1101) on the chassis (1400), and
wobei die Membran zwischen den Befestigungsabschnitten (1101 ) an ihrem Rand zwei gegenüberliegende Randabschnitte ( 105) aufweist, an denen sie nicht am Chassis (1400) befestigt ist, sodass diese Abschnitte (1105) bezüglich dem Chassis frei schwingen können,  the membrane having, between its attachment portions (1101) at its edge, two opposite edge portions (105) to which it is not attached to the chassis (1400) so that these portions (1105) are free to swing relative to the chassis,
wobei die Seitenwände (1420) die Membran (1100) überragen ohne die Membran wherein the side walls (1420) overhang the membrane (1100) without the membrane
(1100) zu berühren. (1100) to touch.
11. Elektrodynamischer Schallwandler nach Anspruch 10, 11. Electrodynamic transducer according to claim 10,
wobei das Chassis (1400) zwischen den Befestigungsabschnitten (1410) mit zwei gegenüberliegenden Seitenwänden (1420) ausgestattet ist, die in ihrer Form den frei schwingenden Randabschnitten (1105) der Membran entsprechen, und wobei zwischen den Randabschnitten (1105) und den Seitenwänden (1420) ein schmaler Spalt vorgesehen ist, dessen Breite kleiner ist als 10% des Durchmessers der Spule (1500). wherein the chassis (1400) between the mounting portions (1410) is provided with two opposing side walls (1420) corresponding in shape to the free-swinging edge portions (1105) of the diaphragm, and between the edge portions (1105) and the side walls (1420 ) is provided a narrow gap whose width is smaller than 10% of the diameter of the coil (1500).
12. Elektrodynamischer Schallwandler nach Anspruch 10 oder 11 , wobei die Membran im Inneren der Spule (1500) als Kalotte (1104) ausgestaltet ist. 12. Electrodynamic transducer according to claim 10 or 11, wherein the membrane in the interior of the coil (1500) is designed as a dome (1104).
13. Elektrodynamischer Schallwandler nach einem der Ansprüche 10 bis 12, 13. Electrodynamic transducer according to one of claims 10 to 12,
wobei die Membran im Außenbereich der Spule (1500) als Sicke (1103) ausgestaltet ist.  wherein the membrane in the outer region of the coil (1500) is configured as a bead (1103).
14. Elektrodynamischer Schallwandler nach einem der Ansprüche 10 bis 13, 14. Electrodynamic transducer according to one of claims 10 to 13,
wobei der Abstand der beiden gegenüberliegenden Befestigungsabschnitte (1410) der Membran in jede Richtung größer als der Durchmesser der Spule (1500) ist.  wherein the distance of the two opposite attachment portions (1410) of the membrane in each direction is greater than the diameter of the coil (1500).
EP15770884.3A 2014-09-26 2015-09-28 Electrodynamic sound transducer Active EP3198889B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014219630.2A DE102014219630A1 (en) 2014-09-26 2014-09-26 Electrodynamic transducer
PCT/EP2015/072226 WO2016046412A1 (en) 2014-09-26 2015-09-28 Electrodynamic sound transducer

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EP3198889A1 true EP3198889A1 (en) 2017-08-02
EP3198889B1 EP3198889B1 (en) 2019-10-09

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EP15770884.3A Active EP3198889B1 (en) 2014-09-26 2015-09-28 Electrodynamic sound transducer

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US (1) US10136224B2 (en)
EP (1) EP3198889B1 (en)
CN (1) CN106717025B (en)
DE (1) DE102014219630A1 (en)
WO (1) WO2016046412A1 (en)

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Publication number Priority date Publication date Assignee Title
DE102014219630A1 (en) 2014-09-26 2016-03-31 Sennheiser Electronic Gmbh & Co. Kg Electrodynamic transducer

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DE4413894C2 (en) * 1994-04-21 2002-12-12 Teves Gmbh Alfred Bending converter in pot form
DE19541197A1 (en) * 1995-11-04 1997-05-07 Nokia Deutschland Gmbh Arrangement for the emission of sound waves
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Publication number Publication date
CN106717025A (en) 2017-05-24
EP3198889B1 (en) 2019-10-09
DE102014219630A1 (en) 2016-03-31
US10136224B2 (en) 2018-11-20
CN106717025B (en) 2020-01-17
US20170257704A1 (en) 2017-09-07
WO2016046412A1 (en) 2016-03-31

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