EP3614494A1 - Performant magnetically inductive antenna for a hearing aid - Google Patents

Performant magnetically inductive antenna for a hearing aid Download PDF

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Publication number
EP3614494A1
EP3614494A1 EP19185643.4A EP19185643A EP3614494A1 EP 3614494 A1 EP3614494 A1 EP 3614494A1 EP 19185643 A EP19185643 A EP 19185643A EP 3614494 A1 EP3614494 A1 EP 3614494A1
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EP
European Patent Office
Prior art keywords
antenna
base
ferrite core
film
carrier
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Granted
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EP19185643.4A
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German (de)
French (fr)
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EP3614494B1 (en
Inventor
Johannes Kuhn
Peter Nikles
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Sivantos Pte Ltd
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Sivantos Pte Ltd
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/55—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired
    • H04R25/554—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired using a wireless connection, e.g. between microphone and amplifier or using Tcoils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
    • H01Q7/08—Ferrite rod or like elongated core
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/273—Adaptation for carrying or wearing by persons or animals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/51—Aspects of antennas or their circuitry in or for hearing aids
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/55—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/70—Adaptation of deaf aid to hearing loss, e.g. initial electronic fitting

Definitions

  • the invention relates to a magnetically inductive antenna for a hearing instrument and to a hearing instrument, in particular a hearing device, with such an antenna.
  • Electronic instruments are generally referred to as hearing instruments, which emit a sound signal into the ear of a person wearing the hearing instrument (also referred to as “user” or “wearer”) and thus support the hearing of this person.
  • this includes in particular hearing aids that serve to care for hearing-impaired wearers.
  • Such hearing aids pick up ambient sound and transmit it to the user in processed, in particular frequency-dependent, amplified form as airborne and / or structure-borne sound, whereby they compensate for the hearing loss of the user entirely or at least partially.
  • Similar to classic hearing aids other hearing instruments process ambient sound, but serve to supply users with normal hearing in order to protect their hearing ability in special situations (e.g. special sound-absorbing hearing instruments for musicians) or to support them in some other way.
  • hearing instruments are also understood to mean devices that convert a wired or wirelessly received audio signal into airborne or structure-borne noise and emit it to the user in this form, e.g. Headphones, earpieces, etc.
  • hearing instruments Different types are known. So-called “behind-the-ear devices” are worn between the skull and the auricle, with the amplified sound signal being inserted into the ear canal by means of a sound tube the person is introduced or is output by means of a sound transducer located in the ear canal (also referred to as a "receiver” or “receiver”).
  • a sound transducer located in the ear canal
  • hearing instrument is an "in-the-ear device” in which the entire hearing aid device itself is inserted into the ear, in particular into the auditory canal.
  • cochlear implants There are also hearing instruments that transmit sound information in the form of structure-borne noise, such as so-called cochlear implants.
  • Magnetic inductive near field transmission is used in hearing instruments as an alternative to traditional radio transmission technologies (e.g. Bluetooth) for the wireless transmission of data, especially audio signals, with external devices.
  • traditional radio transmission technologies e.g. Bluetooth
  • magnetic inductive near-field transmission is frequently used for the communication of two hearing instruments in a binaural hearing system.
  • magnetic-inductive methods are also used for energy transmission, that is, for wireless charging of rechargeable batteries in hearing instruments.
  • the MI antennas required for this i.e. for magnetic-inductive data and / or energy transmission
  • the antenna performance can be increased here with larger ferrite cores, special wrapping and special ferrite materials. Due to the cramped installation space, the sensitive (and therefore prone to failure) electronics in hearing instruments and the desire for the lowest possible weight, the performance increase of conventional MI antennas for use in hearing instruments is limited.
  • MI antennas i.e. antennas for magnetic inductive near-field transmission
  • base the cross-section of the actual winding core
  • screens These antenna surfaces (referred to as “screens” there) are oriented approximately orthogonally to the axis of the winding core.
  • the antenna surfaces on the mutually facing inner sides are optionally available with a para- or diamagnetic one Provide layer through which the interior space formed between the antenna surfaces is magnetically shielded. Electrical or electronic components of the hearing device (for example the battery) can therefore be accommodated in a space-saving manner in the interior between the antenna surfaces.
  • the invention is based on the object of further improving such a film antenna, in particular from a manufacturing point of view.
  • the MI antenna according to the invention comprises two antenna surfaces which are formed from magnetic, flexible film.
  • the MI antenna further comprises a base wound with an antenna winding.
  • the two antenna surfaces are formed from separate magnetic film cuts.
  • the base has an opening on each of the end faces (i.e. the surfaces opposite each other in the direction of the winding axis), into each of which one of the foil blanks (particularly with a tab) is inserted.
  • the MI antenna according to the invention has the advantage that the base can be prefabricated detached from the antenna surfaces, the antenna winding in particular being able to be (and preferably also being) soldered favorably in terms of production technology using the reflow method.
  • the film cuts are only inserted into the openings in the prefabricated base. This manufacturing concept enables an uncomplicated, automated production with conventional production machines.
  • a flat overlap of the foil blanks with one another or with a ferrite core of the base can be achieved by the inserted foil blanks, whereby an efficient magnetic flux between the base and the antenna surfaces and thus a high antenna efficiency can be achieved.
  • the first step and the second step are independent of each other. These steps can therefore be carried out in any chronological order (in particular also simultaneously or overlapping in time).
  • the third step builds on the result of the previous steps and must therefore be carried out after these.
  • the film cuts can have any external contour within the scope of the invention.
  • the antenna areas e.g. each have a circular, semicircular or polygonal outer contour.
  • the tabs to be inserted into the corresponding depressions of the base are preferably narrower than the associated antenna area (that is, they have a smaller width in comparison to the antenna area) and protrude from the edge of the antenna area.
  • the film cuts not shown here are designed as in the Fig. 4 and 10 shown (circular antenna surfaces, each with a tab protruding from the edge thereof), and are inserted with the tabs into the front openings of the base.
  • the film cuts not shown here are designed as in the Fig. 4 and 10 shown (circular antenna surfaces, each with a tab protruding from the edge thereof), and are inserted with the tabs into the front openings of the base.
  • the diamagnetic copper layers When assembled, the diamagnetic copper layers rest on the antenna surfaces, as in Fig. 4-6 and 11 shown.
  • Embodiment 5 (analog 10 and 11 ): Like embodiment 4, but with a plastic carrier instead of a hollow ferrite core
  • Embodiment 6 (without drawing): as embodiment 4, but the tabs abut against one another inside the hollow ferrite core.
  • Exemplary embodiment 7 (without drawing): as exemplary embodiment 4, 5 or 6, but the tabs are clamped inside the hollow ferrite core or plastic carrier by wedges pushed in at the end.
  • the MI antenna is preferably used in a hearing instrument that picks up ambient noise and emits it in a processed, in particular amplified form into the ear of a person wearing the hearing instrument.
  • the MI antenna is intended in particular for use in a hearing device, that is to say a hearing instrument which serves to care for hearing-impaired people.
  • the MI antenna is used primarily for wireless data transmission with a peripheral device, e.g. B. another hearing instrument for the other ear, a remote control, etc. used.
  • the MI antenna according to the invention is used as a charging coil for inductive and wireless energy transmission from a charging device (not shown further) to the hearing instrument.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Support Of Aerials (AREA)
  • Details Of Aerials (AREA)

Abstract

Es wird eine magnetisch-induktive Antenne (1) fær ein H∅rinstrument angegeben. Die Antenne (1) umfasst zwei Antennenfl±chen (4), die aus magnetischer, flexibler Folie gebildet sind, sowie eine mit einer Antennenwicklung (12) bewickelte Basis (2). Die Antennenfl±chen (4) sind aus voneinander getrennten magnetischen Folienzuschnitten (3) gebildet. Die Basis (2) weist an ihren Stirnseiten (16) jeweils eine<sup>a</sup>ffnung (17) auf, in die jeweils einer der Folienzuschnitte (3) eingesteckt ist.A magnetic-inductive antenna (1) for a hearing instrument is specified. The antenna (1) comprises two antenna surfaces (4), which are formed from magnetic, flexible film, and a base (2) wound with an antenna winding (12). The antenna surfaces (4) are formed from separate magnetic film cuts (3). The base (2) has a <sup> a </sup> opening (17) on each of its end faces (16), into each of which one of the film blanks (3) is inserted.

Description

Die Erfindung bezieht auf eine magnetisch induktive Antenne für ein Hörinstrument sowie auf ein Hörinstrument, insbesondere Hörgerät, mit einer solchen Antenne.The invention relates to a magnetically inductive antenna for a hearing instrument and to a hearing instrument, in particular a hearing device, with such an antenna.

Hintergrund der Erfindung:Background of the Invention:

Als Hörinstrument werden allgemein elektronische Gerät bezeichnet, die ein Schallsignal in das Ohr einer das Hörinstrument tragenden Person (auch als "Nutzer" oder "Träger" bezeichnet) abgeben und somit das Hören dieser Person unterstützen. Hierunter fallen im engeren Sinne insbesondere Hörgeräte, die zur Versorgung hörgeschädigter Träger dienen. Solche Hörgeräte nehmen einen Umgebungsschall auf und geben diesen in bearbeiteter, insbesondere frequenzabhängig verstärkter Form als Luft- und/oder Körperschall an den Nutzer ab, wobei sie den Hörverlust des Nutzers ganz oder zumindest teilweise kompensieren. Weitere Hörinstrumente verarbeiten - ähnlich wie klassische Hörgeräte - einen aufgenommenen Umgebungsschall, dienen aber zur Versorgung von normalhörenden Nutzern, um deren Hörvermögen in besonderen Situationen zu schonen (z.B. spezielle schalldämpfende Hörinstrumente für Musiker) oder in sonstiger Weise zu unterstützen. Als Hörinstrumente werden hier um im Folgenden aber auch Geräte verstanden, die ein drahtgebunden oder drahtlos empfangenes Audiosignal in Luft- oder Körperschall umwandeln und in dieser Form an den Nutzer abgeben, z.B. Kopfhörer, Ohrstücke, etc.Electronic instruments are generally referred to as hearing instruments, which emit a sound signal into the ear of a person wearing the hearing instrument (also referred to as “user” or “wearer”) and thus support the hearing of this person. In the narrower sense, this includes in particular hearing aids that serve to care for hearing-impaired wearers. Such hearing aids pick up ambient sound and transmit it to the user in processed, in particular frequency-dependent, amplified form as airborne and / or structure-borne sound, whereby they compensate for the hearing loss of the user entirely or at least partially. Similar to classic hearing aids, other hearing instruments process ambient sound, but serve to supply users with normal hearing in order to protect their hearing ability in special situations (e.g. special sound-absorbing hearing instruments for musicians) or to support them in some other way. In the following, hearing instruments are also understood to mean devices that convert a wired or wirelessly received audio signal into airborne or structure-borne noise and emit it to the user in this form, e.g. Headphones, earpieces, etc.

Es sind unterschiedliche Bauformen von Hörinstrumenten bekannt. So werden sogenannte "Hinter-dem-Ohr-Geräte" zwischen Schädel und Ohrmuschel getragen, wobei das verstärkte Schallsignal mittels eines Schallschlauchs in den Gehörgang der Person eingeleitet wird oder mittels eines in dem Ohrkanal sitzenden Schallwandlers (auch als "Hörer" oder "Receiver" bezeichnet) ausgeben wird. Eine weitere Ausführung eines Hörinstruments ist ein "Im-Ohr-Gerät", bei dem das gesamte Hörhilfegerät selbst in das Ohr, insbesondere in den Gehörgang eingebracht wird. Des Weiteren gibt es Hörinstrumente, die die Schallinformation in Form von Körperschall übertragen, z.B. sogenannte Cochlea-Implantate.Different types of hearing instruments are known. So-called "behind-the-ear devices" are worn between the skull and the auricle, with the amplified sound signal being inserted into the ear canal by means of a sound tube the person is introduced or is output by means of a sound transducer located in the ear canal (also referred to as a "receiver" or "receiver"). Another version of a hearing instrument is an "in-the-ear device" in which the entire hearing aid device itself is inserted into the ear, in particular into the auditory canal. There are also hearing instruments that transmit sound information in the form of structure-borne noise, such as so-called cochlear implants.

Magnetisch induktive Nahfeld-Übertragung wird bei Hörinstrumenten alternativ zu klassischen Funkübertragungstechniken (z.B. Bluetooth) für die drahtlose Übertragung von Daten, insbesondere Audiosignalen, mit externen Geräten verwendet. Insbesondere wird magnetisch induktive Nahfeld-Übertragung häufig für die Kommunikation zweier Hörinstrumente eines binauralen Hörsystems eingesetzt.Magnetic inductive near field transmission is used in hearing instruments as an alternative to traditional radio transmission technologies (e.g. Bluetooth) for the wireless transmission of data, especially audio signals, with external devices. In particular, magnetic inductive near-field transmission is frequently used for the communication of two hearing instruments in a binaural hearing system.

Des Weiteren werden magnetisch-induktive Verfahren auch zur Energieübertragung, also zum drahtlosen Laden wiederaufladbarer Batterien in Hörinstrumenten verwendet.Furthermore, magnetic-inductive methods are also used for energy transmission, that is, for wireless charging of rechargeable batteries in hearing instruments.

Bisher wurden die hierfür (also zur magnetisch-induktiven Daten- und/oder Energieübertragung) erforderlichen MI-Antennen regelmäßig durch einen bloßen bewickelten Ferritkern hergestellt. Die Antennenleistung lässt sich hier durch größere Ferritkerne, spezielle Bewicklung und besondere Ferritmaterialien steigern. Aufgrund des beengten Bauraums, der empfindlichen (und damit störanfälligen) Elektronik in Hörinstrumenten und dem Wunsch nach möglichst geringem Gewicht sind der Leistungssteigerung herkömmlicher MI-Antennen für den Einsatz in Hörinstrumenten aber enge Grenzen gesetzt.So far, the MI antennas required for this (i.e. for magnetic-inductive data and / or energy transmission) have been produced regularly by a bare wound ferrite core. The antenna performance can be increased here with larger ferrite cores, special wrapping and special ferrite materials. Due to the cramped installation space, the sensitive (and therefore prone to failure) electronics in hearing instruments and the desire for the lowest possible weight, the performance increase of conventional MI antennas for use in hearing instruments is limited.

In WO 2017/153274 A1 ist ein Konzept für neuartige magnetisch-induktive Antennen (kurz: MI-Antennen, also Antennen für magnetisch induktive Nahfeld-Übertragung) beschrieben, bei denen der Querschnitt des eigentlichen Wicklungskerns (im Folgenden: Basis) durch flächige magnetische Folien erweitert wird. Diese Antennenflächen (dort als "Schirme" bezeichnet) sind dabei etwa orthogonal zu der Achse des Wicklungskerns ausgerichtet. Die Antennenflächen sind an den einander zugewandten Innenseiten optional mit einer para- oder diamagnetischen Schicht versehen, durch die der zwischen den Antennenflächen gebildete Innenraum magnetisch abgeschirmt wird. In dem Innenraum zwischen den Antennenflächen können daher elektrische oder elektronische Komponenten des Hörgeräts (z.B. die Batterie) bauraumsparend untergebracht werden.In WO 2017/153274 A1 describes a concept for novel magnetic-inductive antennas (short: MI antennas, i.e. antennas for magnetic inductive near-field transmission), in which the cross-section of the actual winding core (hereinafter: base) is expanded by flat magnetic foils. These antenna surfaces (referred to as "screens" there) are oriented approximately orthogonally to the axis of the winding core. The antenna surfaces on the mutually facing inner sides are optionally available with a para- or diamagnetic one Provide layer through which the interior space formed between the antenna surfaces is magnetically shielded. Electrical or electronic components of the hearing device (for example the battery) can therefore be accommodated in a space-saving manner in the interior between the antenna surfaces.

Der Erfindung liegt die Aufgabe zugrunde, eine solche Folienantenne insbesondere unter herstellungstechnischen Aspekten weiter zu verbessern.The invention is based on the object of further improving such a film antenna, in particular from a manufacturing point of view.

Gegenstand der Erfindung:Subject of the invention:

Die erfindungsgemäße MI-Antenne umfasst zwei Antennenflächen, die aus magnetischer, flexibler Folie gebildet sind. Die MI-Antenne umfasst weiterhin eine mit einer Antennenwicklung bewickelte Basis. Erfindungsgemäß sind die beiden Antennenflächen aus voneinander getrennten magnetischen Folienzuschnitten gebildet. Die Basis hat dabei an den Stirnseiten (d.h. den in Richtung der Wicklungsachse einander gegenüberliegenden Flächen) jeweils eine Öffnung, in die jeweils einer der Folienzuschnitte (insbesondere mit einer Lasche) eingesteckt ist.The MI antenna according to the invention comprises two antenna surfaces which are formed from magnetic, flexible film. The MI antenna further comprises a base wound with an antenna winding. According to the invention, the two antenna surfaces are formed from separate magnetic film cuts. The base has an opening on each of the end faces (i.e. the surfaces opposite each other in the direction of the winding axis), into each of which one of the foil blanks (particularly with a tab) is inserted.

Die erfindungsgemäße MI-Antenne hat den Vorteil, dass die Basis losgelöst von den Antennenflächen vorgefertigt werden kann, wobei insbesondere die Antennenwicklung fertigungstechnisch günstig im Reflow-Verfahren verlötet werden kann (und bevorzugt auch wird). Die Folienzuschnitte werden erst nachträglich in die Öffnungen der vorgefertigten Basis eingesteckt. Dieses Herstellungskonzept ermöglicht eine unaufwändige, automatisierte Herstellung mit konventionellen Produktionsmaschinen. Zudem kann durch die eingesteckten Folienzuschnitte eine flächige Überlappung der Folienzuschnitte miteinander oder mit einem Ferritkern der Basis erzielt werden, wodurch ein effizienter Magnetfluss zwischen der Basis und den Antennenflächen und somit eine hohe Antenneneffizienz erzielt werden.The MI antenna according to the invention has the advantage that the base can be prefabricated detached from the antenna surfaces, the antenna winding in particular being able to be (and preferably also being) soldered favorably in terms of production technology using the reflow method. The film cuts are only inserted into the openings in the prefabricated base. This manufacturing concept enables an uncomplicated, automated production with conventional production machines. In addition, a flat overlap of the foil blanks with one another or with a ferrite core of the base can be achieved by the inserted foil blanks, whereby an efficient magnetic flux between the base and the antenna surfaces and thus a high antenna efficiency can be achieved.

Weitere Verkörperungen der Erfindung sind ein mit der erfindungsgemäßen MI-Antenne bestücktes Hörinstrument, insbesondere Hörgerät, sowie ein Verfahren zur Herstellung einer MI-Antenne. Letzteres ist dadurch gekennzeichnet,

  • dass in einem ersten Schritt eine mit einer Antennenwicklung bewickelte Basis hergestellt wird, so dass an den (wie vorstehend definierten) Stirnseiten dieser Basis Öffnungen freigelassen sind; in diesem ersten Schritt wird die Antennenwicklung vorzugsweise mit korrespondierenden Kontaktflächen auf der Basis verlötet,
  • dass in einem zweiten Schritt zwei Antennenflächen als voneinander getrennte Folienzuschnitte aus magnetischer Folie hergestellt werden, und
  • dass in einem dritten Schritt die Folienzuschnitte mit der Basis verbunden werden, indem jeder der beiden Folienzuschnitte jeweils (insbesondere mit einer zugehörigen Lasche) in eine der Öffnungen der Basis eingesteckt wird.
Further embodiments of the invention are a hearing instrument equipped with the MI antenna according to the invention, in particular a hearing aid, and a method for producing an MI antenna. The latter is characterized by
  • that in a first step a base is wound with an antenna winding, so that openings are left on the end faces (as defined above) of this base; in this first step the antenna winding is preferably soldered to corresponding contact areas on the base,
  • that, in a second step, two antenna surfaces are produced as separate film blanks from magnetic film, and
  • that in a third step the foil blanks are connected to the base by inserting each of the two foil blanks (in particular with an associated tab) into one of the openings in the base.

Der ersten Schritt und der zweite Schritt sind hierbei voneinander unabhängig. Diese Schritte können daher in beliebiger zeitlicher Reihenfolge (insbesondere auch gleichzeitig oder zeitlich überlappend) durchgeführt werden. Der dritte Schritt baut dagegen auf dem Ergebnis der vorangehenden Schritte auf und muss somit zeitlich nach diesen ausgeführt werden.The first step and the second step are independent of each other. These steps can therefore be carried out in any chronological order (in particular also simultaneously or overlapping in time). The third step, on the other hand, builds on the result of the previous steps and must therefore be carried out after these.

Die Folienzuschnitte können grundsätzlich im Rahmen der Erfindung eine beliebige Außenkontur aufweisen. In geeigneten Ausführungsformen weisen die Antennenflächen z.B. jeweils eine kreisförmige, halbkreisförmige oder polygonale Außenkontur auf. Die in die korrespondierende Vertiefungen der Basis einzusteckenden Laschen sind vorzugweise schmäler als die zugehörige Antennenfläche (weisen also eine im Vergleich zu der Antennenfläche geringere Breite auf) und stehen von dem Rand der Antennenfläche ab.In principle, the film cuts can have any external contour within the scope of the invention. In suitable embodiments, the antenna areas e.g. each have a circular, semicircular or polygonal outer contour. The tabs to be inserted into the corresponding depressions of the base are preferably narrower than the associated antenna area (that is, they have a smaller width in comparison to the antenna area) and protrude from the edge of the antenna area.

Bevorzugte Ausgestaltungsmerkmale und Varianten der Erfindung:

  • Basis mit hohlem (insbesondere einstückigem) Grundkörper, vorzugsweise Ferritkern, alternativ (Wicklungs-)Träger aus nicht-magnetischem Material wie z.B. Kunststoff oder Keramik, in den die beiden Folienzuschnitte derart eingesteckt sind, dass sie sich im Inneren des Grundkörpers überlappen oder auf Stoß liegen (optional Verklemmung der Folienzuschnitte durch stirnseitig durch die Öffnungen in den Grundkörper eingeführte Keile)
  • Sandwich-artige Basis mit Träger aus nicht-magnetischem Material (Kunststoff, Keramik, etc.) und mit Ferritkern, wobei die Folienzuschnitte zwischen dem Träger und dem Ferritkern eingelegt sind.
  • Anschluss der Antennenwicklung über einen - vorzugsweise flexiblen - gedruckten Schaltungsträger (Printed Circuit Board, kurz: PCB), der einseitig an den Ferritkern oder Träger der Basis angelegt oder um den Ferritkern oder Träger herumgefaltet ist.
  • Ferritkern oder Träger mit elektrischen Kontaktflächen zur Kontaktierung der Antennenwicklung beschichtet
  • Basis mit Ferritkern, der mindestens eine Vertiefung zur Aufnahme einer Lasche eines der Folienzuschnitte aufweist, sowie mit Deckschicht, die die oder jede Vertiefung abdeckt; Varianten:
    • ∘ zwei voneinander getrennte Vertiefungen für je eine Lasche
    • ∘ eine von Stirnseite zu Stirnseite durchgehende Vertiefung zur Aufnahme der Laschen beider Folienzuschnitte
  • dia- oder paramagnetische Schicht (vorzugsweise aus Kupfer) auf die jeweilige Innenseite der Folienzuschnitte aufgebracht, insbesondere im Bereich der Antennenflächen (Laschen im Überlappungsbereich ohne dia- oder paramagnetische Beschichtung)
Preferred design features and variants of the invention:
  • Base with a hollow (in particular one-piece) base body, preferably ferrite core, alternatively (winding) carrier made of non-magnetic material such as plastic or ceramic, in which the two film cuts are inserted such that they overlap in the interior of the base body or lie on one another (optional jamming of the film cuts by wedges inserted through the openings in the base body at the end)
  • Sandwich-like base with carrier made of non-magnetic material (plastic, ceramic, etc.) and with ferrite core, whereby the foil cuts are inserted between the carrier and the ferrite core.
  • Connection of the antenna winding via a — preferably flexible — printed circuit board (PCB), which is applied on one side to the ferrite core or carrier of the base or is folded around the ferrite core or carrier.
  • Ferrite core or carrier coated with electrical contact surfaces for contacting the antenna winding
  • Base with ferrite core, which has at least one recess for receiving a tab of one of the film blanks, and with a cover layer, which covers the or each recess; Variants:
    • ∘ two separate recesses for one tab each
    • ∘ a recess from end to end to accommodate the flaps of both film cuts
  • Dia- or paramagnetic layer (preferably made of copper) applied to the respective inside of the foil cuts, especially in the area of the antenna surfaces (tabs in the overlap area without a dia- or paramagnetic coating)

Ausführungsbeispiele der Erfindung:Exemplary embodiments of the invention:

Einander entsprechende Teile sind in allen Figuren mit den gleichen Bezugszeichen versehen.Corresponding parts are provided with the same reference symbols in all figures.

Ausführungsbeispiel 1 ( Fig. 1 - 3 ): Hier zeigen

Fig. 1
Explosionsdarstellung der Basis
Fig. 2
perspektivische Darstellung der Basis mit Blick auf eine Deckfläche
Fig. 3
perspektivische Darstellung der Basis mit Blick auf einen Boden
Embodiment 1 ( 1 - 3 ): Show here
Fig. 1
Exploded view of the base
Fig. 2
perspective view of the base with a view of a top surface
Fig. 3
perspective view of the base with a view of a floor

Beschreibung des Ausführungsbeispiels: Basis gebildet aus

  • Ferritkern mit voneinander getrennten, jeweils zu einer Stirnseite offenen Vertiefungen zur Einführung jeweils einer Lasche eines der beiden Folienzuschnitte (der Steg zwischen Vertiefungen zwingt den Magnetfluss hierbei durch den Ferritkern, wodurch eine günstige magnetische Ankopplung der Antennenflächen an den Ferritkern bewirkt wird),
  • einer bodenseitigen (von den Vertiefung abgewandten) PCB zum Verlöten der Antennenwicklung,
  • einer die Vertiefungen abdeckenden Deckschicht (PCB, PTFE-Folie, etc.), und
  • der um den Ferritkern, die PCB und die Deckschicht gewickelte Antennenwicklung, mit PCB im Reflow-Verfahren verlötet
Description of the exemplary embodiment: Basis formed from
  • Ferrite core with separate recesses, each open to one end, for insertion of a tab of one of the two foil blanks (the web between the recesses forces the magnetic flux through the ferrite core, which results in a favorable magnetic coupling of the antenna surfaces to the ferrite core),
  • a bottom-side PCB (facing away from the recess) for soldering the antenna winding,
  • a cover layer covering the recesses (PCB, PTFE film, etc.), and
  • the antenna winding wound around the ferrite core, the PCB and the cover layer is soldered to PCB in the reflow process

Die hier nicht gezeigten Folienzuschnitte sind ausgebildet, wie in den Fig. 4 und 10 gezeigt (kreisförmige Antennenflächen mit jeweils einer davon randseitig abstehenden Lasche), und werden mit den Laschen in die stirnseitigen Öffnungen der Basis eingesteckt.The film cuts not shown here are designed as in the Fig. 4 and 10 shown (circular antenna surfaces, each with a tab protruding from the edge thereof), and are inserted with the tabs into the front openings of the base.

Ausführungsbeispiel 2 ( Fig. 4 - 6 ): Hier zeigen

Fig. 4
perspektivische Darstellung der MI-Antenne mit Basis und zwei Folienzuschnitten aus magnetischer Folie (mit innenseitigen diamagnetischen Schichten aus Kupfer zur magnetischen Abschirmung des zwischen den Folienzuschnitten gebildeten Innenraums) im montierten Zustand
Fig. 5
Seitenansicht der MI-Antenne im montierten Zustand
Fig. 6
Längsschnitt der MI-Antenne im montierten Zustand
Embodiment 2 ( 4 - 6 ): Show here
Fig. 4
Perspective view of the MI antenna with base and two foil blanks made of magnetic foil (with diamagnetic layers made of copper on the inside for magnetic shielding of the interior formed between the foil blanks) in the assembled state
Fig. 5
Side view of the MI antenna when assembled
Fig. 6
Longitudinal section of the MI antenna when assembled

Basis gebildet aus

  • Kunststoffträger mit ringförmig geschlossenen stirnseitigen Bügeln zur Einführung jeweils einer Lasche eines der beiden Folienzuschnitte und einem offenen Mittelbereich,
  • einem Ferritkern, der in den offenen Mittelbereich des Trägers eingelegt ist, so dass er an den auf Stoß aneinanderliegenden Laschen der Folienzuschnitte flächig anliegt,
  • einer bodenseitigen (von den Vertiefung abgewandten) PCB oder leitfähigen Beschichtung des Trägers zum Verlöten der Antennenwicklung, und
  • der um den Träger und den Ferritkern (sowie ggf. die PCB) gewickelten Antennenwicklung
Base formed from
  • Plastic carrier with ring-shaped closed end brackets for the insertion of a flap of one of the two film cuts and an open middle area,
  • a ferrite core, which is inserted into the open central region of the carrier, so that it is attached to the tabs of the film blanks which abut one another lies flat,
  • a bottom-side (facing away from the recess) PCB or conductive coating of the carrier for soldering the antenna winding, and
  • the antenna winding wound around the carrier and the ferrite core (and possibly the PCB)

Ausführungsbeispiel 3 ( Fig. 7 - 9 ): Hier zeigen

Fig. 7
Explosionsdarstellung der Basis
Fig. 8
perspektivische Darstellung der Basis mit Blick auf eine Deckfläche
Fig. 9
perspektivische Darstellung der Basis mit Blick auf einen Boden
Embodiment 3 ( 7 - 9 ): Show here
Fig. 7
Exploded view of the base
Fig. 8
perspective view of the base with a view of a top surface
Fig. 9
perspective view of the base with a view of a floor

Basis gebildet aus

  • Ferritkern mit einer von Stirnseite zu Stirnseite durchgehenden Vertiefung zur Einführung der Laschen beider Folienzuschnitte (die Laschen liegen in dieser Vertiefung auf Stoß aneinander an),
  • einer um den Ferritkern herumgefalteten PCB zum Verlöten der Antennenwicklung und zur Abdeckung der Vertiefung, und
  • der um den Ferritkern und die PCB gewickelten Antennenwicklung
Base formed from
  • Ferrite core with a recess running from end to end for inserting the flaps of both foil blanks (the flaps abut one another in this recess),
  • a PCB folded around the ferrite core for soldering the antenna winding and covering the recess, and
  • the antenna winding wound around the ferrite core and the PCB

Die hier nicht gezeigten Folienzuschnitte sind ausgebildet, wie in den Fig. 4 und 10 gezeigt (kreisförmige Antennenflächen mit jeweils einer davon randseitig abstehenden Lasche), und werden mit den Laschen in die stirnseitigen Öffnungen der Basis eingesteckt.The film cuts not shown here are designed as in the Fig. 4 and 10 shown (circular antenna surfaces, each with a tab protruding from the edge thereof), and are inserted with the tabs into the front openings of the base.

Ausführungsbeispiel 4 ( Fig. 10 und 11 ): Hier zeigen

Fig. 10
Explosionsdarstellung der MI-Antenne mit Basis und zwei Folienzuschnitten
Fig. 11
Längsschnitt der MI-Antenne im montierten Zustand
Embodiment 4 ( 10 and 11 ): Show here
Fig. 10
Exploded view of the MI antenna with base and two film cuts
Fig. 11
Longitudinal section of the MI antenna when assembled

Basis gebildet aus

  • hohlem Ferritkern, in dem die Laschen überlappend und flächig aneinander anliegen, und
  • der um den Ferritkern gewickelten Antennenwicklung
Base formed from
  • hollow ferrite core in which the tabs overlap and lie flat against one another, and
  • the antenna winding wound around the ferrite core

Im montierten Zustand liegen die diamagnetischen Kupferschichten an den Antennenflächen an, wie in Fig. 4-6 und 11 gezeigt.When assembled, the diamagnetic copper layers rest on the antenna surfaces, as in Fig. 4-6 and 11 shown.

Ausführungsbeispiel 5 (analog Fig. 10 und 11 ): wie Ausführungsbeispiel 4, aber mit Kunststoffträger statt hohlem Ferritkern
Ausführungsbeispiel 6 (ohne Zeichnung): wie Ausführungsbeispiel 4, aber die Laschen liegen im Inneren des hohlen Ferritkerns auf Stoß aneinander an. Embodiment 5 (analog 10 and 11 ): Like embodiment 4, but with a plastic carrier instead of a hollow ferrite core
Embodiment 6 (without drawing): as embodiment 4, but the tabs abut against one another inside the hollow ferrite core.

Ausführungsbeispiel 7 (ohne Zeichnung): wie Ausführungsbeispiel 4, 5 oder 6, aber die Laschen sind im Inneren des hohlen Ferritkerns oder Kunststoffträgers durch stirnseitig eingeschobene Keile verklemmt. Exemplary embodiment 7 (without drawing): as exemplary embodiment 4, 5 or 6, but the tabs are clamped inside the hollow ferrite core or plastic carrier by wedges pushed in at the end.

Die MI-Antenne wird bevorzugt in einem Hörinstrument eingesetzt, das ein Umgebungsgeräusch aufnimmt und in bearbeiteter, insbesondere verstärkter Form in das Ohr einer das Hörinstrument tragenden Person abgibt. Die MI-Antenne ist dabei insbesondere zum Einsatz in einem Hörgerät vorgesehen, also einem Hörinstrument, das der Versorgung hörgeschädigter Personen dient. In dem Hörinstrument wird die MI-Antenne vor allem zur drahtlosen Datenübertragung mit einem Peripheriegerät, z. B. einem weiteren Hörinstrument für das andere Ohr, einer Fernbedienung etc. genutzt.The MI antenna is preferably used in a hearing instrument that picks up ambient noise and emits it in a processed, in particular amplified form into the ear of a person wearing the hearing instrument. The MI antenna is intended in particular for use in a hearing device, that is to say a hearing instrument which serves to care for hearing-impaired people. In the hearing instrument, the MI antenna is used primarily for wireless data transmission with a peripheral device, e.g. B. another hearing instrument for the other ear, a remote control, etc. used.

Alternativ oder zusätzlich wird die erfindungsgemäße MI-Antenne als Ladespule zur induktiven und drahtlosen Energieübertragung von einem nicht weiter dargestellten Ladegerät an das Hörinstrument herangezogen.Alternatively or additionally, the MI antenna according to the invention is used as a charging coil for inductive and wireless energy transmission from a charging device (not shown further) to the hearing instrument.

Alle Ausführungsbeispiele sind nach dem erfindungsgemäßen Verfahren hergestellt.All of the exemplary embodiments are produced by the method according to the invention.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
MI-AntenneMI antenna
22
BasisBase
33
Folienzuschnittfilm blank
44
Antennenflächeantenna area
55
Lascheflap
66
diamagnetische Schicht aus Kupferdiamagnetic layer of copper
77
Ferritkernferrite
88th
Vertiefung im Ferritkern (zur Aufnahme einer Lasche oder zweier Laschen)Deepening in the ferrite core (to accommodate one tab or two tabs)
99
Deckfoliecover sheet
1010
PCBPCB
1111
Kontaktfläche zur Kontaktierung der Antennenwicklung (aufgedruckte Leiterbahn)Contact surface for contacting the antenna winding (printed conductor track)
1212
Antennenwicklungantenna winding
1313
(Wicklungs-)Träger (Kunststoff)(Winding) carrier (plastic)
1414
Bügel (des Trägers)Bracket (of the wearer)
1515
Kontaktfläche zur Kontaktierung der Antennenwicklung (durch leitfähige Beschichtung auf den Träger aufgebracht)Contact surface for contacting the antenna winding (applied to the carrier by a conductive coating)
1616
Stirnseitefront
1717
Öffnungopening

Claims (11)

Magnetisch-induktive Antenne (1) für ein Hörinstrument, mit zwei Antennenflächen (4), die aus magnetischer, flexibler Folie gebildet sind, sowie mit einer mit einer Antennenwicklung (12) bewickelten Basis (2), wobei die Antennenflächen (4) aus voneinander getrennten magnetischen Folienzuschnitten (3) gebildet sind, und wobei die Basis (2) an ihren Stirnseiten (16) jeweils eine Öffnung (17) aufweist, in die jeweils einer der Folienzuschnitte (3) eingesteckt ist.Magnetic-inductive antenna (1) for a hearing instrument, with two antenna surfaces (4), which are formed from magnetic, flexible film, and with a base (2) wound with an antenna winding (12), the antenna surfaces (4) being made from one another separate magnetic film blanks (3) are formed, and wherein the base (2) has at its end faces (16) each an opening (17) into each of which one of the film blanks (3) is inserted. Antenne (1) nach Anspruch 1,
wobei die Basis (2) aus einem hohlem (insbesondere einstückigen) Grundkörper, vorzugsweise einem Ferritkern (7) oder einem Träger (13) aus nicht-magnetischem Material, z.B. Kunststoff oder Keramik, gebildet ist, in den die beiden Folienzuschnitte (3) derart eingesteckt sind, dass sie sich im Inneren des Grundkörpers überlappen oder auf Stoß aneinander anliegen.Antenna (1) according to claim 1,
the base (2) being formed from a hollow (in particular one-piece) base body, preferably a ferrite core (7) or a carrier (13) made of non-magnetic material, for example plastic or ceramic, into which the two film cuts (3) are made in this way are inserted so that they overlap inside the base body or abut one another. Antenne (1) nach Anspruch 2,
wobei die Folienzuschnitte (3) in dem Grundkörper durch stirnseitig in die Öffnungen (17) eingeführte Keile verklemmt sind.Antenna (1) according to claim 2,
wherein the film cuts (3) are clamped in the base body by wedges inserted into the openings (17) at the end. Antenne (1) nach einem der Ansprüche 1 bis 3,
wobei die Basis (2) einen Träger (13) aus nicht-magnetischem Material, z.B. Kunststoff oder Keramik, und einen Ferritkern (7) umfasst, wobei die Folienzuschnitte (3) zwischen dem Träger (13) und dem Ferritkern (7) eingelegt sind.Antenna (1) according to one of claims 1 to 3,
wherein the base (2) comprises a carrier (13) made of non-magnetic material, for example plastic or ceramic, and a ferrite core (7), the film blanks (3) being inserted between the carrier (13) and the ferrite core (7) , Antenne (1) nach einem der Ansprüche 2 bis 4,
wobei die Basis (2) zum elektrischen Anschluss der Antennenwicklung (12) einen (vorzugsweise flexiblen) gedruckten Schaltungsträger (10) umfasst, der einseitig an den Ferritkern (7) oder Träger (13) angelegt oder um den Ferritkern (7) oder Träger (13) herumgefaltet ist.Antenna (1) according to one of claims 2 to 4,
The base (2) for the electrical connection of the antenna winding (12) comprises a (preferably flexible) printed circuit carrier (10) which is applied on one side to the ferrite core (7) or carrier (13) or around the ferrite core (7) or carrier ( 13) is folded around. Antenne (1) nach einem der Ansprüche 2 bis 4,
wobei der Ferritkern (7) oder Träger (13) mit elektrischen Kontaktflächen (11) zur Kontaktierung der Antennenwicklung (12) beschichtet ist.Antenna (1) according to one of claims 2 to 4,
wherein the ferrite core (7) or carrier (13) is coated with electrical contact surfaces (11) for contacting the antenna winding (12). Antenne (1) nach einem der Ansprüche 2 bis 6,
wobei der Ferritkern (7) mit mindestens einer zu mindestens einer Stirnseite (16) offenen Vertiefung (8) zur Aufnahme einer Lasche (5) eines der Folienzuschnitte (3) aufweist, und wobei die Basis (2) zusätzlich eine Deckschicht (9) aufweist, die die mindestens eine Vertiefung (8) abdeckt.Antenna (1) according to one of claims 2 to 6,
the ferrite core (7) having at least one recess (8) open to at least one end face (16) for receiving a tab (5) of one of the foil blanks (3), and wherein the base (2) additionally has a cover layer (9) which covers the at least one depression (8). Antenne (1) nach Ansprüche 7,
wobei der Ferritkern (7) zwei voneinander durch einem Steg getrennte Vertiefungen (8) zur Aufnahme jeweils einer Lasche (5) aufweist.Antenna (1) according to claims 7,
wherein the ferrite core (7) has two depressions (8) separated from one another by a web, each for receiving a tab (5). Hörinstrument, insbesondere Hörgerät, mit einer Antenne (1) nach einem der Ansprüche 1 bis 8.Hearing instrument, in particular hearing aid, with an antenna (1) according to one of Claims 1 to 8. Verfahren zur Herstellung einer magnetisch induktiven Antenne (1) für ein Hörinstrument, • wobei in einem ersten Schritt eine mit einer Antennenwicklung (12) bewickelte Basis (2) hergestellt wird, so dass an den Stirnseiten (16) dieser Basis (2) Öffnungen (17) freigelassen sind, • wobei in einem zweiten Schritt zwei Antennenflächen (4) als voneinander getrennte Folienzuschnitte (3) aus magnetischer Folie hergestellt werden, und • wobei in einem dritten Schritt die Folienzuschnitte (3) mit der Basis (2) verbunden werden, indem jeder der beiden Folienzuschnitte (3) in eine der Öffnungen (17) der Basis (2) eingesteckt werden. Method for producing a magnetic inductive antenna (1) for a hearing instrument, A base (2) wound with an antenna winding (12) is produced in a first step, so that openings (17) are left free on the end faces (16) of this base (2), • in a second step, two antenna surfaces (4) are produced as separate film blanks (3) made of magnetic film, and • in a third step, the film cuts (3) are connected to the base (2) by inserting each of the two film cuts (3) into one of the openings (17) of the base (2). Verfahren nach Anspruch 10,
wobei in dem ersten Schritt die Antennenwicklung (12) mit korrespondierenden Kontaktflächen (11) auf der Basis (2) verlötet wird.A method according to claim 10,
wherein in the first step the antenna winding (12) is soldered to corresponding contact areas (11) on the base (2).
EP19185643.4A 2018-08-22 2019-07-11 Performant magnetically inductive antenna for a hearing aid Active EP3614494B1 (en)

Applications Claiming Priority (1)

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DE102018214199B3 (en) 2020-01-30
CN110858947A (en) 2020-03-03
US20200068326A1 (en) 2020-02-27
US11183762B2 (en) 2021-11-23
EP3614494B1 (en) 2021-05-05
CN110858947B (en) 2021-07-27

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