DK156360B

DK156360B - Hearing aid with a magnetic core induction coil

Info

Publication number: DK156360B
Application number: DK81782A
Authority: DK
Inventors: Hans Henneberger
Original assignee: Siemens Ag
Priority date: 1981-02-27
Filing date: 1982-02-25
Publication date: 1989-08-07
Also published as: ATA461081A; DK81782A; DE8105651U1; CH659356A5; AT379276B

Description

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DK 156360 BDK 156360 B

Opfindelsen angâr et h0reapparat med magnetkerneinduktionsspole if01ge indledningen til krav 1.The invention relates to a hearing aid with a magnetic core induction coil according to the preamble of claim 1.

Et sâdant h0reapparat kendes fx. fra DE-,brugsra0nster 78 28 920.For example, such a hearing aid is known. from DE, utility bills 78 28 920.

Da der i h0reapparater kun stâr meget lidt indbygningsrum til râ-5 dighed, fremstilles magnetkerneinduktionsspoler, som anvendes som om-formere, kun af de absolut n0dvendige dele. Der anvendes altsâ en spo-lekerne med passende magnetiske egenskaber, pâ hvilken den lakisolerede kobbertrâd som regel vikles direkte.Since in hearing aids there is very little available room space available, magnetic core induction coils, which are used as converters, are manufactured only by the absolutely necessary parts. A coil with suitable magnetic properties is thus used, on which the lacquered copper wire is usually wound directly.

Til grund for opfindelsen ligger den opgave ved h0reapparater af 10 den i indledningen til krav 1 angivne art at for0ge f0lsomheden med de mindst raulige dimensioner.According to the invention, it is the object of hearing aids of the kind specified in the preamble of claim 1 to increase sensitivity with the least reasonable dimensions.

Denne opgave I0ses ved hjælp af de i den kendetegnende del af krav 1 anf0rte ejendommeligheder.This task is solved by means of the properties set forth in the characterizing part of claim 1.

Fortykkelserne pâ spolekernen virker som magnetiske tragte. De ud-15 g0r en forst0rrelse af det for de ankommende feltlinier virksomme tvær-snit af det magnetiske legeme. Derved fâr h0reapparat-magnetkerneinduk-tionsspolen en st0rre f01somhed med de mindst mulige dimensioner. H0re-apparat-magnetkerneinduktionsspolen kan if01ge den foreligende opfin-delse endda hâve mindre dimensioner i forhold til kendte spoler, uden 20 at det ved samme ankommende feltstyrke betyder en mindskelse af f01som-hjeden.The thicknesses of the coil core act as magnetic funnels. They make an enlargement of the cross-section of the magnetic body acting for the arriving field lines. Thereby, the hearing aid magnetic core induction coil provides greater sensitivity with the smallest possible dimensions. According to the present invention, the hearing aid magnetic core induction coil can even have smaller dimensions compared to known coils without, at the same arriving field strength, reducing the frequency.

Magnetkernespoler, hvis viklinger er viklet umiddelbart pâ en mag-netisk spolekerne med fortykkelser ved enden, har i og for sig allerede været kendt gennem længere tid fx fra AT-patentskrift 160.743, DE-frem-25 laeggelsesskrift 20.59.861, DE-brugsm0nster 75.09.610 og US-patentskrif-terne 35.07.039 og 40.64.472 i en anden konstruktions- og funktionsmæs-sig sammenhæng end med h0reapparater. De kendte magnetkernespoler ar-bejder ikke som h0reapparat-magnetkerneinduktionsspolen i h0reapparatet if01ge den foreliggende opfindelse som en elektromagnetisk induktions-30 omformer, hvor der udefra virker et felt pâ spolen og i denne frembrin-ger et signal, som via en forstaerker og lydgiveren i h0reapparatet kan nyttigg0res som akustiske signaler. F01gelig forekommer der ved de kendte magnetkernespoler heller ikke det problem, at en magnetkernespo-le dels skal rainiaturiseres mest muligt, og dels skal dens f01somhed 35 over for den ankommende feltstyrke optimeres. F0rst ved valget af denMagnetic core coils, whose windings are wound immediately on a magnetic coil core with thickening at the end, have in themselves already been known for a long time, for example, from AT patent 160.743, DE-publication 25.59.861, DE usage pattern 75.09 .610 and U.S. Patent Nos. 35.07,039 and 40,64,472 in a different constructional and functional context than with hearing aids. The known magnetic core coils do not operate as the hearing aid magnetic core induction coil in the hearing aid according to the present invention as an electromagnetic induction converter, in which a field acts on the coil and in this produces a signal which via an amplifier and the sound generator in the hearing aid. can be used as acoustic signals. Accordingly, at the known magnetic core coils, there is also no problem that a magnetic core coil must be partly reinitiated as much as possible and partly its sensitivity to the arriving field strength. First in choosing it

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- 2 - specielle form og den fra den kendte teknik afvigende anvendelse som induktionsomformer i h0reapparater opnâs den med den foreliggende op-findelse tilsigtede effekt, dvs. £or0gelsen af £01somheden ved smâ di~ mensioner.- 2 - special form and the use which differs from the prior art as induction inverters in hearing aids, the effect of the present invention is achieved, ie. The increase of the size of small dimensions.

5 Fortykkelserne af enderne af spolelegemet har ved deres benyttelse en yderligere gunstig virkning: De kan dels tjene til indspænding af spolekernen i en viklemaskine, og dels til fastg0relse af den færdige magnetkerneinduktionsspole i h0reapparatet. Med sidefortykkelserne kan der vikles en over hele længden ensartet tyk spole. Dertil beh0ves in-10 tet særskilt spolelegeme, som holder viklingen, og som ved optagelsen af elektromagnetiske svingninger kunne mindske effekten.5 The thicknesses of the ends of the coil body have a further advantageous use in their use: they can serve partly to clamp the coil core of a winding machine and partly to secure the finished magnetic core induction coil in the hearing aid. With the side thicknesses a uniform thick coil can be wound over the entire length. In addition, there is a need for a separate coil body which holds the winding and which, when recording electromagnetic oscillations, could reduce the power.

Fortykkelserne af spolekernen er fortrinsvis fremstillet af det materiale, af hvilket spolekernen selv bestâr* I reglen er dette et magnetisk bl0dt materiale/ fx. Mu-metal.The thicknesses of the coil core are preferably made of the material of which the coil core itself consists * As a rule, this is a magnetic soft material / e.g. Mu-metal.

15 Ved fors0g har det vist sig gunstigt at give fortykkelserne ved enderne af spolelegemet form som pâsatte skiverf som ligger koncentrisk med kernen. Til dette formâl b0r deres diameter overstige kernens med tykkelsen af spoleviklingen, sâledes at det til râdighed stâende vik-lingsrum kan fyldes med det maksimalt mulige vindingstal. I et eksempel 20 fremkom der for skiverne den dobbelte diameter af kernens. Ved dette eksempel er det fordelagtigt/ at vekselfeltf01somheden i forhold til jævnfeltet nâr et optimum, fx. ved de i éksemplet angivne dimensioner.In experiments, it has been found advantageous to give the thickening at the ends of the coil body as attached discs which are concentric with the core. For this purpose, their diameter should exceed the core with the thickness of the coil winding so that the available winding space can be filled with the maximum possible winding number. In Example 20, the discs had the double diameter of the core. In this example, it is advantageous that the alternating field sensitivity to the equilibrium reaches an optimum, e.g. by the dimensions specified in the example.

Yderligere fordele og enkeltheder ved opfindelsen forklares i det f01gende nærmere ved hjælp af de pâ figurerne viste udf0relseseksem-25 pler. Pâ tegningen viser: fig. 1 en med et h0reapparat med magnetkerneinduktionsspole if01ge opfindelsen udstyret h0rebrille, fig. 2 et med et h0reapparat med magnetkerneinduktionsspole 30 if0lge opfindelsen udstyret, bag 0ret bserbart h0reappa- rat, og fig. 3 tvaarsnit gennem magnetkerneinduktionsspole som den an-vendes i et h0reapparat if01ge opfindelsen.Further advantages and details of the invention will be explained in more detail below with the aid of the exemplary embodiments shown in the figures. In the drawing: FIG. 1 shows a hearing aid equipped with a magnetic core induction coil according to the invention; FIG. 2 shows a hearing aid with magnetic core induction coil 30 according to the invention equipped with a rear viewable hearing aid; and FIG. 3 cross-section through the magnetic core induction coil as used in a hearing aid according to the invention.

35 Pâ fig. 1 betegner 1 et brillestel, som ved hængsler er forbundet med brillestænger 2 og 3. Brillestangen 3 indeholder i sin frie ende et - 3 -In FIG. 1, 1 denotes a spectacle frame which is hingedly connected to spectacle bars 2 and 3. The spectacle rod 3 contains at its free end a - 3 -

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batteri 4, som er anbragt i en skifteholder 5. Derpâ f01ger et h0reap-parat 6, en forstærker 7 med en lydstyrkeregulator 8 og en f0rste h0re-apparat-magnetkerneinduktionsspole 9 af udfôrmning som pâ fig. 3 som elektromagnetisk induktionsomformer. For at kunne samvirke elektrisk er 5 komponenterne 4 til 9 forbundet indbyrdes ved hjælp af ledninger 10, 11 og 12. Lydgiveren har desuden en lydleder 13, som via en del 14 forla-der brillestangen 3 og derpâ f0res videre i en slange 15 hen til en elastisk prop 16, som kan indsættes i 0regangen i et 0re.a hearing aid 6, an amplifier 7 with a volume regulator 8, and a first hearing aid magnet core induction coil 9 of embodiment as shown in FIG. 3 as an electromagnetic induction converter. In order to be able to interact electrically, the components 4 to 9 are interconnected by means of wires 10, 11 and 12. Furthermore, the transducer has a sound conductor 13, which via a part 14 leaves the eyeglass 3 and is then passed in a hose 15 to an elastic plug 16 which can be inserted into the ear canal in an ear.

Optagelsen af lyd sker i brillestangen 2, som i sin frie ende li-10 geledes indeholder et batteri 17. Derpâ f01ger sâ en mikrofon 18, en forstærker 19 og en anden h0reapparat-magnetkerneinduktionsspole 20 af udfôrmning som pâ fig. 3 som elektromagnetisk induktionsomformer. Ele-menterne i denne komponentserie 17 til 20 er ogsâ forbundet indbyrdes via ledninger 21, 22 og 23.Sound is recorded in the eyeglass bar 2, which at its free end likewise contains a battery 17. A microphone 18, an amplifier 19 and a second hearing aid magnetic core induction coil 20 of embodiment are provided. 3 as an electromagnetic induction converter. The elements of this component series 17 to 20 are also interconnected via wires 21, 22 and 23.

15 Denne pâ nær h0reapparat-magnetkerneinduktionsspoler 9, 20 af ud- formning som pâ fig. 3 i sig selv kendte udfôrmning af et h0reapparat fungerer pâ den mâde, at lydsignaler, som optages i mikrofonen 18, og som forstærkes i forstærkeren 19, nâr frem til spolen 20. Derfra opbyg-ges der et induktionsfelt, fra hvilket spolen 9 i brillestangen 3 mod-20 tager signaler. Disse f0res til lydgiveren 6 via forstærkeren, som for-synes fra batteriet 4. I denne lydgiver 6 sker omformningen til for-stærkede lydsignaler, som derpâ kan ledes til et 0re via lydlederen 13 og slangen 15.This near-hearing instrument magnetic core induction coils 9, 20 of the design as shown in FIG. 3 in itself known embodiment of a hearing aid operates in the way that audio signals recorded in the microphone 18 and amplified in the amplifier 19 reach the coil 20. From there, an induction field is built up, from which the coil 9 in the spectacle rod 3 receive 20 signals. These are fed to the sound transducer 6 via the amplifier, which appears from the battery 4. In this transducer 6, the conversion is made to amplified sound signals, which can then be fed to an ear via the sound conductor 13 and the hose 15.

Medens apparatet if01ge fig. 1 er udformet som en sâkaldt CROS-25 h0rebrille, hvor lyden optages pâ den ene side af hovedet og f0res til 0ret pâ den anden side af hovedet, viser det pâ fig. 2 tegnede apparat et h0reapparat, som bæres bag 0ret og kun h0rer til dette 0re. I dette apparat findes der som optagemiddel en mikrofon 18 og en enkelt h0reap-parat-magnetkerneinduktionsspole 9 af udfôrmning som pâ fig. 3. Disse 30 kan afhængigt af stillingen af omskifteren 18' være tilsluttet enkelt-vis eller fælles til en forstærker 7, hvorfra de elektriske signaler nâr frem til h0reapparatet 6. Efter omformningen til i forhold til ind-gangen forstærkede akustiske signaler nâr disse via en lydleder 13, som er f0rt gennem en hærekrog 24, til en lydlederslange 15' og en sâkaldt 35 0reoliven 16', som kan f0res ind i 0regangen.While the apparatus of FIG. 1 is designed as a so-called CROS-25 hearing glasses, where the sound is recorded on one side of the head and transmitted to the ear on the other side of the head, as shown in FIG. 2, the apparatus drew a hearing aid which is worn behind the ear and belongs only to that ear. In this apparatus there is provided as a recording means a microphone 18 and a single hearing aid magnetic core induction coil 9 of embodiment as shown in FIG. 3. These 30 may, depending on the position of the switch 18 ', be connected singly or jointly to an amplifier 7, from which the electrical signals reach the hearing aid 6. Following the conversion to acoustic signals amplified relative to the input, these sound conductor 13, which is passed through an armature hook 24, to an audio conductor hose 15 'and a so-called 35 olive 16' which can be inserted into the ear canal.

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Pâ fig. 3 vises en h0reapparat-magnetkerneinduktionsspole 9 i et snit langs dens akse, sâledes sont den anvendes i h0reapparaterne vist pâ figurerne 1 og 2. Her har kernen 26 ved begge sine ender fortykkel-ser 27 og 28/ som har form som ski ver, sont ligger koncentrisk med ker-5 nen 26. Pâ kernen 26 er der anbragt en vikling 29, som derpâ begraenses til siden ved hjælp af delene 27 og 28 og fâr st0tte fra kernen 26. Til en antydning af h0reapparat-magnetkerneinduktionsspolen 9's virkemâde er der punkteret indtegnet magnetfeltlinier 30. Det ses tydeligt, at indtrædningsfladen for linierne 30 er forst0rret gennem sidefortykkel-10 serne 27 og 28. Dette f0rer ved den mindst mnlige dimension af h0re-apparat-magnetkerneinduktionsspolen 9 til den den st0rste f01somhed.In FIG. 3, a hearing aid magnetic core induction coil 9 is shown in a section along its axis so that it is used in the hearing aids shown in Figures 1 and 2. Here, the core 26 has at both ends thickener 27 and 28 lies concentric with the core 26. On the core 26 is arranged a winding 29, which is then limited to the side by means of the parts 27 and 28 and supported by the core 26. A hint of the operation of the hearing aid-magnetic core induction coil 9 is punctured. magnetic field lines 30. It is clearly seen that the entry surface of the lines 30 is enlarged through the side thickeners 27 and 28. This leads to the greatest sensitivity in the least common dimension of the hearing aid magnetic core induction coil 9.

Spolen 20 i h0reapparatet vist pâ fig. 1 er udformet svarende til spo-len 9.The coil 20 of the hearing aid shown in FIG. 1 is formed corresponding to the coil 9.

1515

Claims

1. A hearing aid with a magnetic core induction coil, which operates in a hearing aid, such an electromagnetic induction converter, and whose winding is wound directly on the magnetic coil core, characterized in that the coil core (26) has at its ends thickenings (27, 28) of 5 magnetic material. restricts the winding (29).

Hearing aid according to claim 1, characterized in that the thicknesses (27, 28) are shaped like discs and are concentric with the core, whose diameter is of the order of at least twice the diameter of the core and their thickness at least corresponds to that of the spooler. diameter.

Hearing aid according to claim 1 or 2, characterized in that the coil core (26) as well as its thickening consists of one piece of soft magnetic core material. 15