EP0466961B1 - Hearing aid apparatus to be worn behind the ear - Google Patents

Hearing aid apparatus to be worn behind the ear Download PDF

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Publication number
EP0466961B1
EP0466961B1 EP90113878A EP90113878A EP0466961B1 EP 0466961 B1 EP0466961 B1 EP 0466961B1 EP 90113878 A EP90113878 A EP 90113878A EP 90113878 A EP90113878 A EP 90113878A EP 0466961 B1 EP0466961 B1 EP 0466961B1
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EP
European Patent Office
Prior art keywords
housing
hearing aid
partition
appliance according
aid appliance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90113878A
Other languages
German (de)
French (fr)
Other versions
EP0466961A1 (en
Inventor
Gerhard Büttner
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.)
Sivantos GmbH
Original Assignee
Siemens Audioligische Technik GmbH
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 Siemens Audioligische Technik GmbH filed Critical Siemens Audioligische Technik GmbH
Priority to DK90113878.4T priority Critical patent/DK0466961T3/en
Priority to EP90113878A priority patent/EP0466961B1/en
Priority to AT90113878T priority patent/ATE112922T1/en
Priority to DE59007457T priority patent/DE59007457D1/en
Publication of EP0466961A1 publication Critical patent/EP0466961A1/en
Application granted granted Critical
Publication of EP0466961B1 publication Critical patent/EP0466961B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/60—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles
    • H04R25/604—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles of acoustic or vibrational transducers
    • 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
    • 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
    • H04R2225/49—Reducing the effects of electromagnetic noise on the functioning of hearing aids, by, e.g. shielding, signal processing adaptation, selective (de)activation of electronic parts in hearing aid
    • 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
    • H04R25/45—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback
    • H04R25/456—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback mechanically
    • 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
    • H04R25/60—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles
    • H04R25/607—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles of earhooks

Definitions

  • the invention relates to a hearing aid to be worn behind the ear with a shell-shaped housing and at least one housing chamber for the arrangement of at least one electroacoustic transducer, which is connected via an elastic connecting piece to an opening opening out of the housing.
  • a Y-shaped shielding plate is inserted into a housing shell, which divides an installation space for the microphone from an installation space for a listener and the remaining installation space of the housing against one another.
  • the installation spaces are closed by a second housing shell, the housing shells being held together by a snap connection and by screws.
  • the shielding plate is intended to protect the receiver and the microphone from disruptive magnetic field effects.
  • a BTE device consisting of three modules, namely a plate-shaped central part with recesses for receiving the components of the device and two housing shells placed on the two surfaces of the central part.
  • Sealing ribs attached to the housing shells lie directly on the surfaces of the plate-shaped middle part when the shells are put on and are intended to keep the listener's sound waves away from the microphone.
  • Sufficiently good sound insulation between the sealing ribs attached to the cover shells and the intermediate middle section, which is equipped with the structural elements, cannot be achieved in terms of production technology or can only be achieved with great difficulty.
  • the CH-A-539 375 describes a hearing aid of the type mentioned, the housing consists of two halves and the Interior is divided into chambers for receiving a receiver or a microphone or an amplifier arrangement or a battery.
  • An air inlet connection leads to the microphone chamber and the receiver chamber has a sound outlet opening, on which there is a threaded connection connection for a carrying hook with a formwork line.
  • openings for strands are provided in the wall separating the sound converter chambers from the amplifier chamber.
  • the microphone and receiver are arranged in cup-shaped rubber parts, which are supported by wart-shaped elevations on the inner walls of the chambers.
  • the air inlet connector of the microphone and the sound outlet connector of the receiver are connected with tubular elastic connecting pieces which are tied into housing openings for the sound inlet or sound outlet.
  • the second housing half is used to close the housing and the chambers.
  • the known solution is intended to suppress feedback between the electroacoustic transducers in BTE devices with an acoustic amplification between 30 and 65 dB.
  • a disadvantage of the known BTE device is that when the housing shells are joined together, a secure sealing of the transducer chambers is not achieved, since in the known housing design the shell parts manufactured in larger quantities do not seal with one another with the required accuracy with their outer and intermediate walls.
  • the object of the invention is to improve the noise suppression in hearing aids of the type described in the introduction (avoidance of feedback by structure-borne and airborne noise) in such a way that the devices with extreme amplification (up to over 80 dB) and high output sound pressure (up to 135 dB), without disadvantages for the frequency characteristics, are suitable for severe to very severe hearing loss.
  • the shielding of the electroacoustic transducer against airborne noise can be further improved in that, at least on the inside of the partition of the housing chamber, a sound-absorbing material, a seal or the like that insulates the airborne noise radiated by the transducer. is provided.
  • the bottom of the housing chamber of the converter and the cover of the housing chamber of the converter with a roughened surface or a structure in the form of ribs and / or wall reinforcements or the like. provided, it is avoided that the chamber walls are set in membrane-like vibrations during operation of the transducer.
  • the partition wall forming the side wall of the converter chamber is preferably supported by spaced-apart webs against the housing shell in which the partition wall is molded, preferably injection molded.
  • the housing chamber on the inside is wholly or partly with magnetizable soft iron sheet or the like. lined. This allows the transducer (receiver) to be encapsulated in a specially lockable chamber in a soundproof and magnetically shielded manner, so that the function of the microphone or a hearing coil of the hearing aid remains unaffected even when the amplification and the output sound pressure are extremely high.
  • the hearing aid 1 shown in FIG. 1 has a housing consisting of a first housing shell 2 and a second housing shell 3, which is shown partly broken away and forms a housing cover.
  • the shell 3 can be fastened against the shell 2 by means of screws 4.
  • a hinged flap 9 for example, which covers a group of actuating elements (not shown).
  • the receiver 13 At the opposite end there is a swiveling battery drawer 14, into which a not shown Battery for powering the electrical components of the hearing aid can be inserted.
  • a circumferential partition wall 15 is injected into the first housing shell 2 of the hearing aid 1, which is made of plastic and forms a closed side wall of a housing chamber 16, which is designed to receive the receiver 13.
  • the receiver 13 is encapsulated in the housing chamber 16 for the purpose of air and structure-borne sound insulation and for magnetic shielding.
  • the housing chamber 16 can be closed tightly by its own cover 17, the first housing shell 2 simultaneously forming the bottom 18 of the housing chamber 16.
  • the receiver 13 can e.g. be elastically supported in a rubber part 19 with side projections 20 in the chamber 16.
  • the receiver 13 carries in the area of its sound outlet connector 21 an elastic connecting piece 22 which is inserted into a bore 23 of the threaded connector 10 and is tightly glued to the threaded connector, for example. It is advantageous if the bore 23 is designed as a cone narrowing from the housing chamber 16 to the threaded section 37 of the threaded connector 10. The bond between the connector 22 and the threaded connector 10 in its bore 23 is designated by the reference numeral 24.
  • the threaded connector 10 has a section formed, for example, as a square 25, which can be inserted into the hearing aid in a rotationally secure manner through a correspondingly shaped housing opening 26, in particular in the end wall 27 of the first housing shell 2 facing the support hook 11, and a correspondingly shaped opening 28 in the partition wall 15 .
  • the square 25 has a groove 29 or the like. on, in which the lid 17 placed on the housing chamber 16 engages with a molding or into which a pin or metal web 30 can be inserted, which the closed lid 17 holds in the locking position, the metal web 30, for example, against can support the partition 15 and, if necessary, against a stop (not shown) molded onto the base 18.
  • the second housing shell 3 is placed on the equipped first housing shell 2 and, for example, screwed.
  • the shell 3 covers the lid 17 at a short distance, so that a small air gap remains free.
  • the cover 17 is e.g. provided with a peripheral edge 31, which seals against the free upper end edge of the partition 15. Furthermore, the cover 17 can be placed on the partition wall with the interposition of a seal 32 or a sealant.
  • the bottom 18 of the housing chamber 16 and in particular its cover 17 have a structure 33 on the inside of the chamber.
  • the structuring 33 can consist of a roughened surface, ribs, beads, wall reinforcements or the like. consist.
  • the housing chamber 16 has a shield for the magnetic separation of the receiver 13.
  • the inside, in particular of the partition 15, is lined with a soft iron plate 34.
  • the bottom 18 of the housing chamber for supporting the receiver 13 can also have a covering 35 made of flexible material.
  • the partition wall 15 can be supported by webs 36 against the side wall of the first housing shell 2.
  • the threaded connector 10 can be screwed into the supporting hook 11 with its threaded section 37 carrying an external thread.
  • the threaded connector 10 has a cylindrical, thread-free shoulder 38 following the threaded section 37, the diameter of which is larger than the bore of the supporting hook and the length of which is greater than the pitch of one Thread over a rotation of at least 360 °, this extension 38 forms a seal between the threaded connector and the support hook. This ensures that the end of the support hook facing the hearing device lies tightly against the shoulder 38 of the threaded connector 10 and that no airborne sound can escape through the thread grooves.
  • the square 25 of the threaded connector 10 protruding through the housing opening 26 of the shell 2 and into the opening 28 of the partition 15 forms, together with the elastic connecting piece 22 coupled to the sound output connector 21 of the receiver 13, a sealed switching line connection from the receiver 13 to the sound channel 12 of the carrying hook.
  • a fastening eyelet 39 is formed thereon according to FIG. in the area of the opening 28 of the partition 15 and in the area of the locking point of the threaded connector 10 by means of a screw 40 against an invisible fastening pin of the first housing shell 2 can be screwed.
  • This fastening point is covered by the second housing shell 3 from the outside as well as the locking of the threaded connector 10 by means of the metal web 30 and by the cover 17.
  • the cover 17 can be fastened at the same time by means of a continuous housing screw 4, so that an additional screw 40 superfluous.
  • a wire connection 41 to the amplifier arrangement 42 arranged in the housing or to the current source is provided for the power supply of the receiver 13.
  • a grommet 43 is arranged in the partition wall 15 as a leadthrough.
  • An angled section 44 of the partition 15 forms, together with the first housing shell 2, a second housing chamber 45, in which the microphone 7 is arranged.
  • the second housing chamber 45 and the housing space which receives the amplifier arrangement 42 and other hearing aid components are covered by the second housing shell 3.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Headphones And Earphones (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

To suppress interfering sound, it is proposed in a hearing aid which is to be worn behind the ear (1) and has shell-shaped housing that, moulded into a first housing shell (2) is a separating wall (15) which forms a peripheral closed side wall of a housing chamber (16) for accommodating an electro-acoustic transducer (13), that the first housing shell forms the bottom (18) of the housing chamber (16), that the housing chamber can be closed by a cover (17) which can be placed onto the free upper end edge of the separating wall and that a second housing shell (3), which can be placed onto the first housing shell for closing the housing, covers the cover (17) of the housing chamber (16) with a slight spacing. <IMAGE>

Description

Die Erfindung betrifft ein hinter dem Ohr zu tragendes Hörhilfegerät mit einem schalenförmigen Gehäuse und wenigstens einer Gehäusekammer für die Anordnung mindestens eines elektroakustischen Wandlers, der über ein elastisches Verbindungsstück mit einer aus dem Gehäuse ausmündenden Öffnung verbunden ist.The invention relates to a hearing aid to be worn behind the ear with a shell-shaped housing and at least one housing chamber for the arrangement of at least one electroacoustic transducer, which is connected via an elastic connecting piece to an opening opening out of the housing.

Bei einem bekannten HdO-Gerät dieser Art (DE-U-87 13 087) ist in eine Gehäuseschale eine Y-förmig gestaltete Abschirmplatte eingesetzt, die einen Einbauraum für das Mikrofon von einem Einbauraum für einen Hörer und den restlichen Einbauraum des Gehäuses gegeneinander abteilt. Die Einbauräume werden durch eine zweite Gehäuseschale geschlossen, wobei die Gehäuseschalen durch eine Schnappverbindung und durch Schrauben zusammengehalten werden. Durch die Abschirmplatte sollen der Hörer und das Mikrofon vor störenden Magnetfeldeffekten geschützt werden.In a known BTE device of this type (DE-U-87 13 087), a Y-shaped shielding plate is inserted into a housing shell, which divides an installation space for the microphone from an installation space for a listener and the remaining installation space of the housing against one another. The installation spaces are closed by a second housing shell, the housing shells being held together by a snap connection and by screws. The shielding plate is intended to protect the receiver and the microphone from disruptive magnetic field effects.

Aus der DE-B-11 39 549 ist ein HdO-Gerät bekannt, bestehend aus drei Baugruppen, nämlich einem plattenförmigen Mittelteil mit Ausnehmungen zur Aufnahme der Bauteile des Gerätes und zwei auf die beiden Flächen des Mittelteiles aufgesetzten Gehäuseschalen. An den Gehäuseschalen angebrachte Abdichtungsrippen liegen beim Aufsetzen der Schalen auf den Flächen des plattenförmigen Mittelteiles direkt auf und sollen die Schallwellen des Hörers vom Mikrofon fernhalten. Eine ausreichend gute Schalldämmung zwischen den an die Deckschalen angebrachten Abdichtungsrippen und dem dazwischen liegenden, mit den Bauelementen bestückten Mittelteil ist fertigungstechnisch nicht oder nur unter hohen Schwierigkeiten erreichbar.From DE-B-11 39 549 a BTE device is known, consisting of three modules, namely a plate-shaped central part with recesses for receiving the components of the device and two housing shells placed on the two surfaces of the central part. Sealing ribs attached to the housing shells lie directly on the surfaces of the plate-shaped middle part when the shells are put on and are intended to keep the listener's sound waves away from the microphone. Sufficiently good sound insulation between the sealing ribs attached to the cover shells and the intermediate middle section, which is equipped with the structural elements, cannot be achieved in terms of production technology or can only be achieved with great difficulty.

Die CH-A-539 375 beschreibt ein Hörhilfegerät der eingangs genannten Art, dessen Gehäuse aus zwei Hälften besteht und dessen Innenraum in Kammern zur Aufnahme eines Hörers bzw. eines Mikrofones bzw. einer Verstärkeranordnung bzw. einer Batterie unterteilt ist. Zur Mikrofonkammer führt ein Lufteinlaßstutzen und die Hörerkammer weist eine Schallaustrittsöffnung auf, an der sich ein mit einem Gewinde versehener Anschlußstutzen für einen Traghaken mit Schalleitung befindet. Für den elektrischen Anschluß des Mikrofones und des Hörers sind in der die Schallwandler-Kammern von der Verstärker-Kammer trennenden Wand Öffnungen für Litzen vorgesehen. Mikrofon und Hörer sind in becherförmigen Gummiteilen angeordnet, die sich durch warzenförmige Erhebungen an den Innenwänden der Kammern abstützen. Ferner sind der Lufteinlaßstutzen des Mikrofones und der Schallaustrittsstutzen des Hörers mit schlauchförmigen elastischen Verbindungsstücken verbunden, die in Gehäuseöffnungen zum Schalleintritt bzw. Schallauslaß eingeknüpft sind. Zum Verschließen des Gehäuses und der Kammern dient die zweite Gehäusehälfte. Durch die bekannte Lösung soll bei HdO-Geräten mit einer akustischen Verstärkung zwischen 30 und 65 dB eine Unterdrückung von Rückkopplungen zwischen den elektroakustischen Wandlern erreicht werden. Nachteilig beim bekannten HdO-Gerät ist, daß beim Zusammenfügen der Gehäuseschalen eine sichere Abdichtung der Wandler-Kammern nicht erreicht wird, da bei der bekannten Gehäuseausbildung die in höheren Stückzahlen gefertigten Schalenteile nicht mit der erforderlichen Genauigkeit mit ihren Außen- und Zwischenwänden dicht gegeneinander abschließen.The CH-A-539 375 describes a hearing aid of the type mentioned, the housing consists of two halves and the Interior is divided into chambers for receiving a receiver or a microphone or an amplifier arrangement or a battery. An air inlet connection leads to the microphone chamber and the receiver chamber has a sound outlet opening, on which there is a threaded connection connection for a carrying hook with a formwork line. For the electrical connection of the microphone and the handset, openings for strands are provided in the wall separating the sound converter chambers from the amplifier chamber. The microphone and receiver are arranged in cup-shaped rubber parts, which are supported by wart-shaped elevations on the inner walls of the chambers. Furthermore, the air inlet connector of the microphone and the sound outlet connector of the receiver are connected with tubular elastic connecting pieces which are tied into housing openings for the sound inlet or sound outlet. The second housing half is used to close the housing and the chambers. The known solution is intended to suppress feedback between the electroacoustic transducers in BTE devices with an acoustic amplification between 30 and 65 dB. A disadvantage of the known BTE device is that when the housing shells are joined together, a secure sealing of the transducer chambers is not achieved, since in the known housing design the shell parts manufactured in larger quantities do not seal with one another with the required accuracy with their outer and intermediate walls.

Aufgabe der Erfindung ist es, bei Hörgeräten der eingangs beschriebenen Art die Störschallunterdrückung (Vermeidung von Rückkopplungen durch Körper- und Luftschall) so zu verbessern, daß die Geräte mit extremer Verstärkung (bis über 80 dB) und hohem Ausgangsschalldruck (bis über 135 dB), ohne Nachteile für die Frequenzcharakteristik, für starke bis sehr starke Schwerhörigkeiten geeignet sind.The object of the invention is to improve the noise suppression in hearing aids of the type described in the introduction (avoidance of feedback by structure-borne and airborne noise) in such a way that the devices with extreme amplification (up to over 80 dB) and high output sound pressure (up to 135 dB), without disadvantages for the frequency characteristics, are suitable for severe to very severe hearing loss.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Patentanspruches 1 gelöst. Die erfindungsgemäße Ausbildung der vom Gehäuseverschluß unabhängigen und eigenständig verschließbaren Kammern ermöglicht insbesondere eine spezielle Kapselung des Hörers, die den Anforderungen auch bei extrem leistungsstarken Hörgeräten gerecht wird.This object is achieved by the features of claim 1. The design according to the invention of the chambers, which are independent of the housing closure and which can be locked independently, enables, in particular, a special encapsulation of the receiver which meets the requirements even with extremely powerful hearing aids.

Die Abschirmung des elektroakustischen Wandlers gegen Luftschall kann dadurch noch verbessert werden, daß wenigstens auf der Innenseite der Trennwand der Gehäusekammer ein schalldämpfendes Material, eine den vom Wandler abgestrahlten Luftschall dämmende Dichtung od.dgl. vorgesehen ist.The shielding of the electroacoustic transducer against airborne noise can be further improved in that, at least on the inside of the partition of the housing chamber, a sound-absorbing material, a seal or the like that insulates the airborne noise radiated by the transducer. is provided.

Wird nach einer weiteren Ausbildung der Erfindung der Boden der Gehäusekammer des Wandlers und der Deckel der Gehäusekammer des Wandlers mit einer aufgerauhten Oberfläche oder einer Strukturierung in Form von Rippen und/oder Wandverstärkungen od.dgl. versehen, so wird vermieden, daß beim Betrieb des Wandlers die Kammerwände membranartig in Schwingungen versetzt werden. Vorzugsweise wird die die Seitenwand der Wandler-Kammer bildende Trennwand durch im Abstand angeordnete Stege gegen die Gehäuseschale abgestützt, in der die Trennwand angeformt, vorzugsweise angespritzt, ist.According to a further embodiment of the invention, the bottom of the housing chamber of the converter and the cover of the housing chamber of the converter with a roughened surface or a structure in the form of ribs and / or wall reinforcements or the like. provided, it is avoided that the chamber walls are set in membrane-like vibrations during operation of the transducer. The partition wall forming the side wall of the converter chamber is preferably supported by spaced-apart webs against the housing shell in which the partition wall is molded, preferably injection molded.

Für die magnetische Abschirmung der Schallwandler (Hörer - Hörspule) ist die Gehäusekammer auf der Innenseite ganz oder teilweise mit magnetisierbarem Weicheisenblech od.dgl. ausgekleidet. Damit kann der Wandler (Hörer) in einer eigens verschließbaren Kammer schalldicht und magnetisch abgeschirmt gekapselt werden, so daß selbst bei extrem hohen Werten der Verstärkung und des Ausgangsschalldruckes die Funktion des Mikrofones oder einer Hörspule des Hörhilfegerätes unbeeinträchtigt bleiben.For the magnetic shielding of the sound transducers (receiver - hearing coil), the housing chamber on the inside is wholly or partly with magnetizable soft iron sheet or the like. lined. This allows the transducer (receiver) to be encapsulated in a specially lockable chamber in a soundproof and magnetically shielded manner, so that the function of the microphone or a hearing coil of the hearing aid remains unaffected even when the amplification and the output sound pressure are extremely high.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus den Patentansprüchen 6 bis 18 sowie der nachfolgenden Beschreibung eines Ausführungsbeispieles anhand der Zeichnung.Further features and advantages of the invention result from the patent claims 6 to 18 and the following description of an embodiment with reference to the drawing.

Es zeigt:

  • Figur 1 ein Hinter-dem-Ohr-Hörhilfegerät gemäß der Erfindung, bei dem die das Gehäuse verschließende zweite Gehäuseschale teilweise entfernt ist,
  • Figur 2 einen Schnitt durch die mit einem Hörer bestückte Gehäusekammer, an die ein Gewindestutzen zur Befestigung eines Traghakens mit Schalleitung angesetzt ist,
  • Figur 3 einen Gewindestutzen zur Anbringung des Traghakens, der in die Schallaustrittsöffnung des Gehäuses sowie in den Durchbruch der Trennwand der Gehäusekammer eingesetzt und gegen die Trennwand verriegelt ist,
  • Figur 4 eine Draufsicht auf den Gewindestutzen nach Figur 3, vom Innenraum der Gehäusekammer aus betrachtet.
It shows:
  • FIG. 1 shows a behind-the-ear hearing aid according to the invention, in which the second housing shell that closes the housing is partially removed,
  • FIG. 2 shows a section through the housing chamber equipped with a receiver, to which a threaded connector for attaching a support hook with formwork cable is attached,
  • FIG. 3 shows a threaded connector for attaching the support hook, which is inserted into the sound outlet opening of the housing and into the opening in the partition of the housing chamber and is locked against the partition,
  • Figure 4 is a plan view of the threaded connector of Figure 3, viewed from the interior of the housing chamber.

Das in Figur 1 dargestellte Hörhilfegerät 1 weist ein aus einer ersten Gehäuseschale 2 und einer zweiten Gehäuseschale 3, die teilweise abgebrochen gezeichnet ist und einen Gehäusedeckel bildet, bestehendes Gehäuse auf. Nach dem Ausführungsbeispiel ist die Schale 3 gegen die Schale 2 mittels Schrauben 4 befestigbar. Bedienungselemente, insbesondere Lautstärkeregler 5 und Schalter 6 zum Umschalten zwischen einem Mikrofon 7 und einer Hör- bzw. Telefonspule 8, ragen auf der Rückfläche aus dem Gehäuse. Außerdem befindet sich an der Rückfläche des Gehäuses eine z.B. schwenkbar angebrachte Klappe 9, die eine Gruppe von nicht gezeichneten Stellelementen abdeckt. Ein an einem Gewindestutzen 10 des Gehäuses befestigbarer Traghaken 11, in dem ein Schallkanal 12 verläuft, erleichtert die Positionierung des Hörhilfegerätes 1 hinter dem Ohr des Hörgechädigten und leitet gleichzeitig die von einem elektroakustischen Wandler, im folgenden als Hörer 13 bezeichnet, abgegebenen akustischen Signale zum Ohr. Am gegenüberliegenden Ende befindet sich eine herausschwenkbare Batterielade 14, in die eine nicht gezeichnete Batterie zur Stromversorgung der elektrischen Bauteile des Hörhilfegerätes einlegbar ist.The hearing aid 1 shown in FIG. 1 has a housing consisting of a first housing shell 2 and a second housing shell 3, which is shown partly broken away and forms a housing cover. According to the exemplary embodiment, the shell 3 can be fastened against the shell 2 by means of screws 4. Operating elements, in particular volume control 5 and switch 6 for switching between a microphone 7 and a hearing or telephone coil 8, protrude from the housing on the rear surface. In addition, on the rear surface of the housing there is a hinged flap 9, for example, which covers a group of actuating elements (not shown). A support hook 11, which can be fastened to a threaded connector 10 of the housing and in which a sound channel 12 runs, facilitates the positioning of the hearing aid device 1 behind the ear of the hearing impaired person and at the same time conducts the acoustic signals emitted by an electroacoustic transducer, hereinafter referred to as the receiver 13, to the ear . At the opposite end there is a swiveling battery drawer 14, into which a not shown Battery for powering the electrical components of the hearing aid can be inserted.

In die aus Kunststoff bestehende, erste Gehäuseschale 2 des Hörhilfegerätes 1 ist eine umlaufende Trennwand 15 eingespritzt, die eine geschlossene Seitenwand einer Gehäusekammer 16 bildet, welche zur Aufnahme des Hörers 13 ausgebildet ist. Der Hörer 13 wird in der Gehäusekammer 16 zwecks Luft- und Körperschalldämmung sowie zur magnetischen Abschirmung abgekapselt. Dazu ist die Gehäusekammer 16 durch einen eigenen Deckel 17 dicht verschließbar, wobei die erste Gehäuseschale 2 gleichzeitig den Boden 18 der Gehäusekammer 16 mit bildet. Der Hörer 13 kann z.B. in einem Gummiteil 19 mit seitlichen Anformungen 20 in der Kammer 16 elastisch gelagert sein.A circumferential partition wall 15 is injected into the first housing shell 2 of the hearing aid 1, which is made of plastic and forms a closed side wall of a housing chamber 16, which is designed to receive the receiver 13. The receiver 13 is encapsulated in the housing chamber 16 for the purpose of air and structure-borne sound insulation and for magnetic shielding. For this purpose, the housing chamber 16 can be closed tightly by its own cover 17, the first housing shell 2 simultaneously forming the bottom 18 of the housing chamber 16. The receiver 13 can e.g. be elastically supported in a rubber part 19 with side projections 20 in the chamber 16.

Ferner trägt der Hörer 13 im Bereich seines Schallausgangsstutzens 21 ein elastisches Verbindungsstück 22, das in eine Bohrung 23 des Gewindestutzens 10 eingesetzt ist und mit dem Gewindestutzen z.B. dicht verklebt ist. Es ist vorteilhaft, wenn die Bohrung 23 als sich von der Gehäusekammer 16 zum Gewindeabschnitt 37 des Gewindestutzens 10 verengender Konus ausgebildet ist. Die Klebstelle zwischen dem Verbindungsstück 22 und dem Gewindestutzen 10 in dessen Bohrung 23 ist mit der Bezugsziffer 24 bezeichnet. Der Gewindestutzen 10 weist einen z.B. als Vierkant 25 ausgebildeten Abschnitt auf, der durch eine entsprechend geformte Gehäuseöffnung 26, insbesondere in der dem Traghaken 11 zugewandten Stirnwand 27 der ersten Gehäuseschale 2, und einen entsprechend geformten Durchbruch 28 der Trennwand 15 verdrehungssicher in das Hörhilfegerät einsetzbar ist. Zur Verrastung des Gewindestutzens 10 im Hörhilfegerät 1 weist z.B. der Vierkant 25 eine Nut 29 od.dgl. auf, in die der auf die Gehäusekammer 16 aufgesetzte Deckel 17 mit einer Anformung eingreift oder in die ein Stift oder Metallsteg 30 einsetzbar ist, den der geschlossene Deckel 17 in der Verriegelungslage hält, wobei sich der Metallsteg 30 z.B. gegen die Trennwand 15 und gegebenenfalls gegen einen nicht gezeichneten, am Boden 18 angespritzten Anschlag abstützen kann.Furthermore, the receiver 13 carries in the area of its sound outlet connector 21 an elastic connecting piece 22 which is inserted into a bore 23 of the threaded connector 10 and is tightly glued to the threaded connector, for example. It is advantageous if the bore 23 is designed as a cone narrowing from the housing chamber 16 to the threaded section 37 of the threaded connector 10. The bond between the connector 22 and the threaded connector 10 in its bore 23 is designated by the reference numeral 24. The threaded connector 10 has a section formed, for example, as a square 25, which can be inserted into the hearing aid in a rotationally secure manner through a correspondingly shaped housing opening 26, in particular in the end wall 27 of the first housing shell 2 facing the support hook 11, and a correspondingly shaped opening 28 in the partition wall 15 . To lock the threaded connector 10 in the hearing aid 1, for example, the square 25 has a groove 29 or the like. on, in which the lid 17 placed on the housing chamber 16 engages with a molding or into which a pin or metal web 30 can be inserted, which the closed lid 17 holds in the locking position, the metal web 30, for example, against can support the partition 15 and, if necessary, against a stop (not shown) molded onto the base 18.

Zum Verschließen des mit den Bauteilen bestückten Hörhilfegerätes 1 wird nach der Abkapselung der Kammer 16 durch den Deckel 17 die zweite Gehäuseschale 3 auf die bestückte erste Gehäuseschale 2 aufgesetzt und mit dieser z.B. verschraubt. Dabei überdeckt die Schale 3 den Deckel 17 mit geringem Abstand, so daß ein kleiner Luftspalt frei bleibt.To close the hearing aid 1 equipped with the components, after the chamber 16 has been encapsulated by the cover 17, the second housing shell 3 is placed on the equipped first housing shell 2 and, for example, screwed. The shell 3 covers the lid 17 at a short distance, so that a small air gap remains free.

Zur weiteren Abkapselung des Hörers 13 gegenüber dem Mikrofon 7 und gegenüber der Hörspule 8 wird der Deckel 17 z.B. mit einem umlaufenden Rand 31 versehen, der gegen die freie obere Stirnkante der Trennwand 15 abdichtet. Ferner kann der Deckel 17 unter Zwischenlage einer Dichtung 32 oder eines Dichtungsmittels auf die Trennwand aufgesetzt werden.For further encapsulation of the receiver 13 with respect to the microphone 7 and with respect to the hearing coil 8, the cover 17 is e.g. provided with a peripheral edge 31, which seals against the free upper end edge of the partition 15. Furthermore, the cover 17 can be placed on the partition wall with the interposition of a seal 32 or a sealant.

Zur Vermeidung von Vibrationen, die insbesondere bei dünnwandigen Gehäuseabschnitten auftreten können, ist vorgesehen, daß der Boden 18 der Gehäusekammer 16 sowie insbesondere deren Deckel 17 eine Strukturierung 33 auf den Kammerinnenseiten aufweisen. Die Strukturierung 33 kann aus einer aufgerauhten Oberfläche, aus Rippen, Sicken, Wandverstärkungen od.dgl. bestehen.To avoid vibrations, which can occur in particular in the case of thin-walled housing sections, it is provided that the bottom 18 of the housing chamber 16 and in particular its cover 17 have a structure 33 on the inside of the chamber. The structuring 33 can consist of a roughened surface, ribs, beads, wall reinforcements or the like. consist.

Zur magnetischen Trennung des Hörers 13 weist die Gehäusekammer 16 eine Abschirmung auf. Nach dem Ausführungsbeispiel ist die Innenseite insbesondere der Trennwand 15 mit einem Weicheisenblech 34 ausgekleidet. Gemäß Figur 2 kann ferner der Boden 18 der Gehäusekammer zur Lagerung des Hörers 13 einen Belag 35 aus nachgiebigem Material tragen. Schließlich kann die Trennwand 15 durch Stege 36 gegen die Seitenwand der ersten Gehäuseschale 2 abgestützt sein.The housing chamber 16 has a shield for the magnetic separation of the receiver 13. According to the exemplary embodiment, the inside, in particular of the partition 15, is lined with a soft iron plate 34. According to FIG. 2, the bottom 18 of the housing chamber for supporting the receiver 13 can also have a covering 35 made of flexible material. Finally, the partition wall 15 can be supported by webs 36 against the side wall of the first housing shell 2.

Der Gewindestutzen 10 ist mit seinem, ein Außengewinde tragenden Gewindeabschnitt 37 in den Traghaken 11 einschraubbar. Zur guten Abdichtung und Befestigung, wobei auch die Rillen der Gewindegänge abgedichtet werden, weist der Gewindestutzen 10 im Anschluß an den Gewindeabschnitt 37 einen zylindrischen, gewindefreien Ansatz 38 auf, dessen Durchmesser größer ist als die Bohrung des Traghakens und dessen Länge größer ist als die Steigung eines Gewindeganges über eine Drehung von wenigstens 360°, wobei dieser Ansatz 38 eine Dichtung zwischen dem Gewindestutzen und dem Traghaken bildet. Damit ist sichergestellt, daß der Traghaken mit seinem dem Hörgerät zugewandten Ende dicht gegen den Ansatz 38 des Gewindestutzens 10 anliegt und auch kein Luftschall über die Gewinderillen austreten kann. Der durch die Gehäuseöffnung 26 der Schale 2 und in den Durchbruch 28 der Trennwand 15 ragende Vierkant 25 des Gewindestutzens 10 bildet zusammen mit dem mit dem Schallausgangsstutzen 21 des Hörers 13 gekoppelten elastischen Verbindungsstück 22 eine abgedichtete Schalleitungsverbindung vom Hörer 13 zum Schallkanal 12 des Traghakens.The threaded connector 10 can be screwed into the supporting hook 11 with its threaded section 37 carrying an external thread. For good sealing and fastening, the grooves of the threads also being sealed, the threaded connector 10 has a cylindrical, thread-free shoulder 38 following the threaded section 37, the diameter of which is larger than the bore of the supporting hook and the length of which is greater than the pitch of one Thread over a rotation of at least 360 °, this extension 38 forms a seal between the threaded connector and the support hook. This ensures that the end of the support hook facing the hearing device lies tightly against the shoulder 38 of the threaded connector 10 and that no airborne sound can escape through the thread grooves. The square 25 of the threaded connector 10 protruding through the housing opening 26 of the shell 2 and into the opening 28 of the partition 15 forms, together with the elastic connecting piece 22 coupled to the sound output connector 21 of the receiver 13, a sealed switching line connection from the receiver 13 to the sound channel 12 of the carrying hook.

Zur Befestigung des Deckels 17 ist gemäß Figur 3 daran eine Befestigungsöse 39 angeformt, die z.B. im Bereich des Durchbruches 28 der Trennwand 15 sowie im Bereich der Verriegelungsstelle des Gewindestutzens 10 mittels einer Schraube 40 gegen einen nicht sichtbaren Befestigungszapfen der ersten Gehäuseschale 2 verschraubbar ist. Diese Befestigungsstelle wird durch die zweite Gehäuseschale 3 von außen her ebenso abgedeckt wie die Verriegelung des Gewindestutzens 10 mittels des Metallsteges 30 und durch den Deckel 17. Mittels einer durchgehenden Gehäuseschraube 4 kann jedoch gleichzeitig der Deckel 17 befestigt werden, so daß sich eine zusätzliche Schraube 40 erübrigt.For fastening the cover 17, a fastening eyelet 39 is formed thereon according to FIG. in the area of the opening 28 of the partition 15 and in the area of the locking point of the threaded connector 10 by means of a screw 40 against an invisible fastening pin of the first housing shell 2 can be screwed. This fastening point is covered by the second housing shell 3 from the outside as well as the locking of the threaded connector 10 by means of the metal web 30 and by the cover 17. However, the cover 17 can be fastened at the same time by means of a continuous housing screw 4, so that an additional screw 40 superfluous.

Zur Stromversorgung des Hörers 13 ist eine Litzenverbindung 41 zu der im Gehäuse angeordneten Verstärkeranordnung 42 bzw. zur Stromquelle vorgesehen. Als Litzendurchführung ist in der Trennwand 15 eine Tülle 43 angeordnet.A wire connection 41 to the amplifier arrangement 42 arranged in the housing or to the current source is provided for the power supply of the receiver 13. A grommet 43 is arranged in the partition wall 15 as a leadthrough.

Ein abgewinkelt verlaufender Abschnitt 44 der Trennwand 15 bildet zusammen mit der ersten Gehäuseschale 2 eine zweite Gehäusekammer 45, in der das Mikrofon 7 angeordnet ist. Die zweite Gehäusekammer 45 sowie der die Verstärkeranordnung 42 und übrigen Hörgerätebauteile aufnehmende Gehäuseraum werden durch die zweite Gehäuseschale 3 abgedeckt. Durch die Gehäuseschale 2 zur Gehäusekammer 45 führt eine Schalleintrittsöffnung 46, in die ein mit dem Mikrofon verbundenes Schlauchstück 47 eingeknöpft ist.An angled section 44 of the partition 15 forms, together with the first housing shell 2, a second housing chamber 45, in which the microphone 7 is arranged. The second housing chamber 45 and the housing space which receives the amplifier arrangement 42 and other hearing aid components are covered by the second housing shell 3. A sound inlet opening 46, through which a piece of hose 47 connected to the microphone is buttoned, leads through the housing shell 2 to the housing chamber 45.

Claims (18)

  1. Hearing aid appliance (1) intended to be worn behind the ear and having a shell-shaped housing and at least one housing chamber for mounting at least one electroacoustic transducer (13) which is connected via an elastic connecting piece (22) to an opening which opens out of the housing, characterized in that a partition (15) is formed in a first housing shell (2), which partition forms a circumferential, closed chamber side wall, in that the first housing shell forms the base (18) of the housing chamber (16), in that the housing chamber can be closed by a cover (17) which can be mounted on the free upper end edge of the partition, and in that a second housing shell (3) which can be mounted on the first housing shell for the purpose of closing the housing spans the cover (17) of the housing chamber (16) at a small distance.
  2. Hearing aid appliance according to Claim 1, characterized in that a sound-damping material or a seal which insulates the air-borne sound radiated by the transducer, is provided at least on the inside of the partition (15) of the housing chamber (16).
  3. Hearing aid appliance according to Claim 1 or 2, characterized in that that side of the base (18) and/or of the lid (17) which is adjacent to the housing chamber (16) has a structuring (33) in the form of a roughened surface and/or in the form of ribs and/or in the form of wall reinforcements for the purpose of preventing membrane-type vibrations.
  4. Hearing aid appliance according to one of Claims 1 to 3, characterized in that the partition (15) is supported by webs (36) against the first housing shell (2).
  5. Hearing aid appliance according to Claim 2, characterized in that the housing chamber (2) is lined, entirely or partly, with soft-iron sheet (34) on the inside.
  6. Hearing aid appliance according to one of Claims 1 to 5, characterized in that the cover (17) of the housing chamber (16) tightly encloses the free upper end edge of the partition (15) by means of a circumferential rim (31).
  7. Hearing aid appliance according to Claim 6, characterized in that the cover (17) can be mounted on the free upper end edge of the partition (15) using a sealing agent or a seal (32) for the purpose of sealing off the housing chamber (16).
  8. Hearing aid appliance according to one of Claims 1 to 7, characterized in that a perforation (28) for the elastic connecting piece (22) of the transducer (13) leading to the opening (26) opening out of the housing is provided in a section of the partition (15).
  9. Hearing aid appliance according to Claim 8, characterized in that a threaded tube (10) intended for the attachment and for the connection of a wearing hook (11) can be inserted through the housing opening (26) into the perforation (28) of the partition by means of a thread-free section and in that the cover (17) of the housing chamber (16) locks the thread-free section in the vicinity of the partition.
  10. Hearing aid appliance according to Claim 9, characterized in that the thread-free section of the threaded tube (10) has a groove (29) in which the cover engages by means of an attachment.
  11. Hearing aid appliance according to one of Claims 1 to 10, characterized in that the cover (17) can be screwed (40) against the partition and/or against fixing studs of the first housing shell (2).
  12. Hearing aid appliance according to one of Claims 1 to 10, characterized in that the cover (17) has at least one moulded-on fixing eye (39) and a fixing point (40) is provided, in particular, in the vicinity of the partition perforation (15, 28) for the threaded tube (10).
  13. Hearing aid appliance according to one of Claims 1 to 12, characterized in that, to lock the threaded tube (10), a metal web (30) or a pin can be inserted in the groove (29) of the thread-free section (25) of the threaded tube, which web or pin is supported against the partition (15) and is held in the locked position by the lid (17).
  14. Hearing aid appliance according to one of Claims 1 to 13, characterized in that a litz leadthrough which is intended for the electrical connection (41) of the transducer (13) and into which a bush (43) can be inserted as a seal and cord grip is provided in the partition (15).
  15. Hearing aid appliance according to one of Claims 1 to 13, characterized in that an angled section (44) of the partition forms a second housing chamber (45) for a further electroacoustic transducer (7) with the first housing shell (2), in that the second housing chamber (45) can be covered by the second housing shell (3), and in that a sound outlet opening (46) to the second housing chamber is provided in the first housing shell (2).
  16. Hearing aid appliance according to Claim 9, characterized in that the threaded tube (10) which can be screwed into a bore of the wearing hook (11) has, adjacent to the thread (37) a cylindrical thread-free shoulder (38) whose diameter is larger than the bore of the wearing hook and whose length is greater than the lead of a thread turn over a revolution of 360°, and in that said shoulder (38) forms a seal between the threaded tube (10) and the wearing hook (11).
  17. Hearing aid appliance according to one of Claims 1 to 16, characterized in that that section of the threaded tube (10) which can be inserted through a housing opening (26) and the perforation (28) of the partition (15) forms a triangle or polygon (25) for the purpose of rotation-proof mounting in the correspondingly shaped housing opening or in the correspondingly shaped perforation.
  18. Hearing aid appliance according to one of Claims 9, 16 or 17, characterized in that the threaded tube (10) has a bore (23) for the insertion of the elastic connecting piece (22) of the transducer (13), which bore extends as a tapering cone from the polygon (25) to the tube section (37) to be connected to the wearing hook.
EP90113878A 1990-07-19 1990-07-19 Hearing aid apparatus to be worn behind the ear Expired - Lifetime EP0466961B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DK90113878.4T DK0466961T3 (en) 1990-07-19 1990-07-19 A hearing aid portable behind the ear
EP90113878A EP0466961B1 (en) 1990-07-19 1990-07-19 Hearing aid apparatus to be worn behind the ear
AT90113878T ATE112922T1 (en) 1990-07-19 1990-07-19 BEHIND THE EAR HEARING AID.
DE59007457T DE59007457D1 (en) 1990-07-19 1990-07-19 Hearing aid to be worn behind the ear.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP90113878A EP0466961B1 (en) 1990-07-19 1990-07-19 Hearing aid apparatus to be worn behind the ear

Publications (2)

Publication Number Publication Date
EP0466961A1 EP0466961A1 (en) 1992-01-22
EP0466961B1 true EP0466961B1 (en) 1994-10-12

Family

ID=8204232

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90113878A Expired - Lifetime EP0466961B1 (en) 1990-07-19 1990-07-19 Hearing aid apparatus to be worn behind the ear

Country Status (4)

Country Link
EP (1) EP0466961B1 (en)
AT (1) ATE112922T1 (en)
DE (1) DE59007457D1 (en)
DK (1) DK0466961T3 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7460680B2 (en) * 2003-06-30 2008-12-02 Siemens Hearing Instruments, Inc. Feedback reducing receiver mount and assembly
US7616773B2 (en) 2003-12-05 2009-11-10 Oticon A/S Communication device with receiver enclosure
US8873785B2 (en) 2007-12-11 2014-10-28 Zounds Hearing, Inc. Attenuating tip for hearing aid
DK2229009T3 (en) 2009-03-09 2014-02-03 Oticon As Hearing aid
TWI786486B (en) 2020-12-10 2022-12-11 仁寶電腦工業股份有限公司 Hearing aid device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1139549B (en) * 1961-06-16 1962-11-15 Robert Bosch Elektronik Ges Mi Device for the hearing impaired to be worn behind the ear
CA1235791A (en) * 1984-01-04 1988-04-26 Gordon B. Gore Suspension for electro-acoustical transducers
CH664057A5 (en) * 1984-02-27 1988-01-29 Phonak Ag HOERGERAET.

Also Published As

Publication number Publication date
DE59007457D1 (en) 1994-11-17
ATE112922T1 (en) 1994-10-15
DK0466961T3 (en) 1995-03-27
EP0466961A1 (en) 1992-01-22

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