EP3425927B1 - Procédé de fabrication d'une partie de boîtier d'un dispositif d'aide auditive, partie de boîtier pour un dispositif d'aide auditive et dispositif d'aide auditive - Google Patents

Procédé de fabrication d'une partie de boîtier d'un dispositif d'aide auditive, partie de boîtier pour un dispositif d'aide auditive et dispositif d'aide auditive Download PDF

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Publication number
EP3425927B1
EP3425927B1 EP18177395.3A EP18177395A EP3425927B1 EP 3425927 B1 EP3425927 B1 EP 3425927B1 EP 18177395 A EP18177395 A EP 18177395A EP 3425927 B1 EP3425927 B1 EP 3425927B1
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EP
European Patent Office
Prior art keywords
housing part
hearing device
wall
housing
matrix material
Prior art date
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Application number
EP18177395.3A
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German (de)
English (en)
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EP3425927A1 (fr
Inventor
Björn Freels
Daniela Beck
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Sivantos Pte Ltd
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Sivantos Pte Ltd
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Publication of EP3425927A1 publication Critical patent/EP3425927A1/fr
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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
    • 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
    • H04R25/65—Housing parts, e.g. shells, tips or moulds, or their manufacture
    • H04R25/652—Ear tips; Ear moulds
    • 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
    • H04R25/65—Housing parts, e.g. shells, tips or moulds, or their manufacture
    • H04R25/658—Manufacture of housing parts
    • 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
    • H04R2225/025—In the ear hearing aids [ITE] hearing aids

Definitions

  • the invention relates to a method for producing a housing part of a hearing device.
  • the invention also relates to such a housing part and also to a hearing device with such a housing part.
  • a hearing device is usually used to output acoustic signals to the ear of a wearer of this hearing device.
  • a hearing device usually comprises an output converter, which is usually designed as a loudspeaker (also referred to as a “receiver” or “listener”).
  • This output transducer is usually surrounded by a housing part of the hearing device, for example a housing shell or the like, in order to protect the output transducer from environmental influences and / or to enable the output transducer to be aligned as intended, for example in the ear canal of the wearer of the hearing device.
  • Such a hearing device can be, for example, a headset, headphones, so-called (in ear) wearables, tinnitus masks or the like.
  • hearing devices are also used to supply people with reduced hearing with (often wearer-specific) amplified and / or filtered acoustic signals in order to at least partially compensate for the hearing impairment present.
  • a hearing device is also referred to as a hearing aid device or hearing device for short.
  • the hearing device usually also includes an input transducer, usually in the form of a microphone for capturing ambient noise and a downstream signal processor (also: “controller”) for processing (filtering) and / or amplification) of signals generated from the ambient noise and for outputting these processed signals to the output converter.
  • the output transducer can also - depending on the type of hearing loss - be designed as a bone conduction receiver or cochlear implant for mechanical or electrical stimulation of the wearer's hearing.
  • BTE behind-the-ear hearing aids
  • the at least one microphone, the signal processor and an energy source are arranged in a housing (part) to be worn behind the auricle.
  • the output transducer can also be arranged in this housing (part) and in this case is connected to the ear canal of the wearer by means of a sound tube.
  • the loudspeaker can also be arranged in its own housing part (often referred to as an “earpiece”) and be connected to the components arranged in the actual hearing aid housing via a signal line.
  • in-the-ear hearing aids (“ITE” for short) are also used, which have a housing that is to be worn entirely or partially in the auditory canal and contains the electronic components.
  • ITE in-the-ear hearing aids
  • the outer contour of the hearing aid is individually adapted to the auditory canal or made adaptable to a multitude of different auditory canal shapes using flexible "plug-like" ear pieces (also referred to as "domes").
  • EP 1 385 355 A1 it is known, for example, to provide an ITE with a textile cover so that it can cling to the ear canal.
  • this coating can also be impregnated with an active ingredient (for example medicinal), which is then slowly released to the surrounding body tissue.
  • the housing parts formed in this case are made of a comparatively rigid material.
  • the loudspeaker In the event that the loudspeaker has to have a high amplification effect, it must also be supported by flexible damping materials (in particular to reduce structure-borne noise-related feedback to the microphone), so that the required installation space increased.
  • the housing of the BTE should also be made of a fiber-reinforced plastic that is as rigid as possible.
  • the invention is based on the object of enabling an improved housing part for a hearing device.
  • This object is achieved according to the invention by a method for producing a housing part of a hearing device according to the features of claim 1.
  • This object is also achieved according to the invention by a method for producing a hearing device according to the features according to claim 11.
  • this object is achieved according to the invention by a Housing part for a hearing device with the features of claim 12.
  • the object is achieved according to the invention by a hearing device with the features of claim 13.
  • the method according to the invention is used to produce a housing part of a hearing device to be worn in the auditory canal of a person (hereinafter referred to as “carrier” for short).
  • This housing part serves to accommodate at least one electronic component of the hearing device in a housing interior.
  • a fiber framework for a wall of the housing part that at least partially delimits the housing interior is constructed from fibers (alternatively also referred to as “filaments”).
  • a mechanical property of the wall preferably to be finished in a later method step
  • the fiber framework is then at least over part of its (preferably longitudinal extension running along the reference direction is infiltrated with a matrix material.
  • reference direction is understood here and below to mean a direction along which a (upper) surface of the housing part, which is predetermined by the wall or the fiber structure, extends.
  • a longitudinal extension of the housing part preferably runs in this reference direction. In particular, it is not a question of the thickness direction of the wall or the fiber structure.
  • the reference direction is a direction of insertion of the housing part into the auditory canal.
  • direction of insertion is to be understood in particular as the direction along which the housing part, specifically the finished hearing device, is intended to be inserted into the ear canal of the wearer.
  • the method according to the invention advantageously creates the possibility of reducing the number of individual parts required for a hearing device and of saving installation space and assembly costs. This is achieved in particular by integrating the functions of different structures of conventional hearing devices, in particular usually individual, separate components, which have different mechanical properties for their respective purpose, into a common component, namely the housing part described above.
  • the housing part according to the invention for the hearing device is produced by means of the method described here and below.
  • the housing part according to the invention thus has the physical features resulting from the respective method steps.
  • the hearing device according to the invention comprises the housing part described above and thus produced according to the method according to the invention.
  • the housing part as well as the hearing apparatus comprising it thus also have the advantages of the method according to the invention.
  • a flexibility of the wall is specified in a varying manner as a mechanical property.
  • the fiber framework is constructed in such a way that in the intended (final) production state of the housing part the wall has a specifically varying rigidity (i.e. different rigidity values).
  • areas can be created on a single housing part, for example, which have increased rigidity (ie an increased rigidity value) for holding components (e.g. further housing parts and / or electronic components), and other areas which, due to particularly low rigidity (ie a low rigidity value), for example, enable a particularly comfortable adaptation to the ear canal of the wearer (i.e. being able to snuggle up to the ear canal).
  • the wall therefore has a flexibility that varies along the reference direction, in particular the insertion direction, in the intended final production state.
  • a compressibility of the wall is also specified as a mechanical property (in addition or as an alternative to flexibility).
  • the flexibility of the wall is increasingly specified, in particular in the direction of insertion.
  • This means that the wall in the finished state has a higher flexibility (or lower rigidity) in the area of its end leading in the direction of insertion than at its end which is lagging in the direction of insertion.
  • the course of flexibility (or also rigidity) can be continuous and / or at least one more or less pronounced jump in rigidity (ie a step-like change).
  • the area with the lowest stiffness or the highest flexibility (hereinafter also referred to as the “flexible area”) is preferably designed in such a way that elastic deformation by hand is possible without the application of particular force.
  • the area with the highest rigidity is preferred designed in such a way that such (manual) elastic deformation is not possible or, in comparison to the flexible area, is only possible with significantly increased use of force and / or only to a negligible degree.
  • the fiber framework in order to specify the mechanical properties of the wall, is constructed in a varying manner in its geometric structure and / or in its density.
  • structural features reflected in external dimensions such as B. the wall thickness, ribs, beads and the like, as well as "internal structural features", such as in particular an alignment of the fibers within the fiber structure.
  • the fibers are aligned, for example, in such a way that they can absorb a large part of the forces acting on the wall during use, or, alternatively, that these forces act across the fibers, so that a reinforcing effect is comparatively small.
  • the density of the fiber framework in particular the number of fibers running in a volume element of the fiber framework is specified differently.
  • a particularly crosslinkable elastomer is used as the matrix material.
  • the matrix material is therefore a material with comparatively high elasticity and flexibility per se, which is reinforced to locally different stiffness values by means of the fiber structure.
  • This elastomer is preferably a silicone (specifically a polyorganosiloxane), rubber, rubber or the like.
  • the elastomer used preferably has a sufficiently low viscosity in the non-crosslinked state in order to enable the infiltration of the fiber structure as possible without the inclusion of air bubbles.
  • methods such as B. dipping or processes supported by a pressure difference, comparable to resin injection processes, in which the matrix material is sucked in using negative pressure or injected using overpressure.
  • the matrix material, in particular the elastomer is preferably also cured (ie crosslinked) after the infiltration.
  • thermoplastic elastomer is used.
  • the fiber framework is preferably infiltrated in such a way that the resulting wall is closed, i.e. H. is not open-pored or penetrated like a channel.
  • the wall is thus preferably tight against the passage of impurities or moisture.
  • thermoplastic plastic in particular a polyamide or a polyether block amide, is used as the material for the fibers of the fiber structure.
  • other thermoplastics such as polyester are also used.
  • the fiber framework is built up by means of electrospinning. Under the action of an electric field, a number of fibers are drawn off from a polymer solution and deposited on a counter electrode, in particular in the form of a type of fleece.
  • the fibers formed are placed in a mold core (also referred to as a “target”), which defines the subsequent geometry of the fiber structure.
  • the fibers are laid down in a manner comparable to a 3D printing process without such a mold core and "stacked" to form the fiber structure.
  • the variation of the properties of the fiber structure i.e.
  • the fiber framework is made from a woven and / or non-woven (fiber) semi-finished product - i.e. H. in particular from a fabric, scrim, fleece or the like - built up.
  • a woven and / or non-woven (fiber) semi-finished product i.e. H. in particular from a fabric, scrim, fleece or the like - built up.
  • these semi-finished products such as B. deep drawing, for use.
  • the mechanical properties are preferably varied by using different semi-finished products that vary from one another, for example in terms of their density, their material thickness and / or their fiber orientation.
  • the stiffness profile of the wall compared to electrospinning, usually has clearly pronounced (i.e. in particular recognizable step-like) transitions between areas of different stiffness values.
  • an end of the fiber framework that is opposite to the reference direction (i.e. the one that lags in particular in the insertion direction) and that forms an annular edge around the housing interior is kept free of the matrix material.
  • the fibers of the fiber framework are exposed and are not embedded in the matrix material.
  • the housing interior is preferably closed at the end or edge of the housing part kept free of matrix material with a cover plate - also referred to as a "faceplate” in the case of an ITE.
  • This cover plate is expediently attached to the wall by means of an adhesive in such a way that the adhesive penetrates into the fiber framework, which is kept free from the matrix material, and thus, in addition to an adhesive (cohesive) connection, also claws with the fiber framework (and thus also a form-fitting connection) forms with the housing part.
  • This thus also relates to a method for producing the hearing device with the housing part described above.
  • the cover plate is therefore preferably connected to the housing part in the manner described above.
  • the invention described above enables - as already described - the formation of a housing part, in particular a hearing aid housing, which has mechanical properties that vary at least in regions.
  • the end of the housing part protruding into the auditory canal is preferably designed to be particularly flexible, so that, on the one hand, it clings to the auditory canal and, on the other hand, also offers a dampened fastening structure (or: mounting) for the loudspeaker, especially when the required sound levels are comparatively high.
  • the housing part produced according to the method described above represents, viewed in the thickness direction, the sole casing delimiting the hearing aid components from the auditory canal Holder of hearing aid components is inserted.
  • Such an inner housing is in particular a "frame part" made of a comparatively rigid plastic, for example a polyamide, an ABS (acrylonitrile-butadiene-styrene copolymer) or comparable plastics.
  • a hearing device 1 specifically an in-the-ear hearing device, is shown as the hearing device.
  • the hearing aid 1 comprises a housing 2 which is essentially formed from a first housing part 3 and a second housing part 4.
  • the first housing part 3 forms a component which is also referred to as "Earshell” and which circumferentially delimits a housing interior 5.
  • the second housing part 4 is also referred to as a “faceplate” and forms a cover plate with which the housing interior 5 is closed on one side from the housing part 3.
  • the second housing part 4 has, inter alia, a microphone opening 6 for recording ambient noise by means of a microphone arranged in the housing interior 5 and a battery compartment door 7 for reversibly holding and positioning a hearing aid battery (not shown in detail).
  • the hearing aid 1 has an outer contour that tapers along a reference direction, specifically an insertion direction 8, along which the hearing aid 1 is intended to be inserted into an auditory canal of a wearer.
  • the first housing part 3 has a sound outlet opening 10 (shown schematically) through which airborne sound generated in the ear canal of the wearer by a loudspeaker arranged in the housing interior 5 is emitted in the direction of the eardrum when worn as intended.
  • the second housing part 4 or the faceplate is placed on the edge 12 of the first housing part 3 there and connected to it by an adhesive connection.
  • the first housing part 3 has increasing flexibility, that is to say decreasing rigidity values, in the insertion direction 8, ie from the rear end 11 or the edge 12 there, in the direction of the tip end 9.
  • the first housing part 3 is designed so soft and flexible in the area of the tip end 9 that it clings to the contour of the auditory canal in this area can and at the same time can also serve as a damping element for the loudspeaker positioned in this area within the housing interior 5.
  • the housing part 3 is designed as a fiber composite component.
  • a fiber framework (for the later wall 14) is first built up from fibers 20.
  • a thermoplastic plastic specifically a polyamide, is used as the material for these fibers 20.
  • the fibers are electrospinned with - as in Fig. 2 schematically indicated - in the direction of insertion 8 decreasing density, ie specifically with a weight and / or volume-related fiber content decreasing in relation to the finished housing part 3, placed on top of the fiber structure.
  • the fiber structure and thus the interstices between the fibers 20 are infiltrated with a matrix material, ie filled with wetting of the fibers 20.
  • a matrix material ie filled with wetting of the fibers 20.
  • the wall 14 is tight, ie not penetrated by air inclusions or free spaces (or: "spongy").
  • a crosslinkable silicone, which cures, ie is crosslinked, after the infiltration of the fiber structure, is used as the matrix material 22.
  • the matrix material 22 thus has a viscosity that is sufficiently low for the infiltration of the fiber structure and, in the crosslinked state, a sufficiently low flexibility.
  • the fiber framework is kept free in the region of the edge 12, so that the fibers 20 are exposed in this region and are not embedded in the matrix material 22.
  • the second housing part 4 is then glued onto the edge 12 by means of an adhesive. The adhesive penetrates into the exposed fiber structure and forms both a material and form-fitting connection between the second housing part 4 and the first housing part 3.
  • a further embodiment is shown in more detail.
  • the variation in the rigidity or flexibility of the first housing part 3 or its wall 14 along the direction of insertion 8 takes place here via a combination of the geometric structure of the fiber framework and also by the above-described variation of the fiber content of the fibers 20 along the direction of insertion 8 Housing part 3 has a gradually decreasing wall thickness as seen in the insertion direction 8.
  • the fiber content of the fibers 20 increases analogously to that based on FIG Fig. 2 described embodiment also in the direction of the tip end 9 from.
  • the fibers 20 are not arranged by means of electrospinning, but are formed as part of at least two semi-finished fiber products of different types.
  • the first housing part 3 has at least two areas separated from one another in a step-like manner with regard to flexibility.
  • the different semi-finished fiber products are draped on a mold core (for example wound or otherwise laid on) and / or reshaped by means of a mold core depicting the housing interior 5, for example by thermoforming (also referred to as deep drawing).

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Prostheses (AREA)
  • Nonwoven Fabrics (AREA)

Claims (14)

  1. Procédé de fabrication d'une partie de boîtier (3) d'une prothèse auditive (1) destinée à être portée dans le conduit auditif d'une personne, la partie de boîtier (3) servant à loger au moins un composant électronique de la prothèse auditive (1) dans un intérieur de boîtier (5), dans lequel, selon le procédé
    - un squelette de fibres est construit à partir de fibres (20) pour une paroi (14) de la partie de boitier (3) entourant au moins partiellement l'intérieur du logement (5)
    - au moyen des fibres (20) une propriété mécanique de la paroi (14) le long d'une direction de référence (8) de la partie de boitier (3), est prédéterminée de manière variable, dans lequel une flexibilité de la paroi (14) est prédéterminée de manière variable comme propriété mécanique, dans lequel la direction de référence (8) s'étend le long d'une surface de la partie de boitier (3), ladite surface étant prédéterminé par la paroi (14) ou respectivement par le squelette de fibres, et
    - le squelette de fibres est infiltré avec un matériau de matrice (22) sur au moins une partie de son étendue longitudinale.
  2. Procédé selon la revendication 1,
    dans lequel la flexibilité de la paroi (14) est de plus en plus prédéterminée dans une direction d'insertion (8) le long de laquelle la partie du boîtier (3) est insérée dans le canal auditif de la personne comme prévu.
  3. Procédé selon la revendication 1 ou 2,
    dans lequel, afin de prédéterminer la propriété mécanique de la paroi (14), le squelette de fibres est construit de manière variable dans sa structure géométrique et/ou sa densité.
  4. Procédé selon l'une des revendications 1 à 3,
    dans lequel un élastomère en particulier réticulable est utilisé comme matériau de matrice (22).
  5. Procédé selon l'une des revendications 1 à 4,
    dans lequel une matière plastique thermoplastique, en particulier un polyamide ou un polyéther-blocamide, est utilisée comme matériau pour les fibres (20).
  6. Procédé selon l'une des revendications 1 à 5,
    dans lequel le squelette de fibres est construit par électrofilage.
  7. Procédé selon l'une des revendications 1 à 5,
    dans lequel le squelette de fibres est construit à partir d'un produit semi-fini tissé et/ou non tissé.
  8. Procédé selon l'une des revendications 1 à 7,
    dans lequel une extrémité (11) du squelette de fibres située à l'opposé de la direction de référence (8) et formant un bord annulaire (12) autour de l'intérieur du boîtier (5) est tenue à l'écart de matériau de matrice (22).
  9. Procédé selon la revendication 8,
    dans lequel l'intérieur (5) de la partie de boîtier (3) à l'extrémité (11) de la partie de boîtier (3) qui est tenue à l'écart de matériau de matrice (22) est fermé par une plaque de recouvrement (4), et dans lequel la plaque de recouvrement (4) est fixée à la paroi (14) de la partie de boîtier (3) au moyen d'un adhésif de telle sorte que l'adhésif pénètre dans le squelette de fibres qui est tenu à l'écart du matériau de matrice (22).
  10. Procédé de fabrication d'une prothèse auditive (1),
    dans lequel une partie de boîtier (3) de la prothèse auditive (1) à porter dans le canal auditif d'une personne est fabriquée selon la revendication 8, dans lequel l'intérieur du boîtier (5) de la partie de boîtier (3) à l'extrémité (11) de la partie de boîtier (3) tenue à l'écart de matériau de matrice (22) est fermé par une plaque de recouvrement (4), et dans lequel la plaque de recouvrement (4) est fixée à la paroi (14) de la partie de boîtier (3) au moyen d'un adhésif de telle sorte que l'adhésif pénètre dans le squelette de fibres qui est tenu à l'écart du matériau de matrice (22).
  11. Partie de boîtier (3), à porter dans le canal auditif d'une personne, pour une prothèse auditive (1), fabriquée selon l'une des revendications 1 à 9.
  12. Prothèse auditive (1) avec une partie de boîtier (3) selon la revendication 11.
  13. Prothèse auditive (1) selon la revendication 12,
    dans laquelle la partie du boîtier (3) est à porter dans le canal auditif d'une personne et, vue dans le sens de son épaisseur, constitue le seul revêtement qui sépare les éléments de la prothèse auditive du canal auditif.
  14. Prothèse auditive (1) selon la revendication 12,
    dans laquelle, par sections, une sorte de boîtier intérieur, qui est formée par une partie de cadre en plastique relativement rigide, est insérée dans la partie de boîtier (3) décrite ci-dessus pour maintenir les composants de la prothèse auditive.
EP18177395.3A 2017-07-07 2018-06-12 Procédé de fabrication d'une partie de boîtier d'un dispositif d'aide auditive, partie de boîtier pour un dispositif d'aide auditive et dispositif d'aide auditive Active EP3425927B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017211668.4A DE102017211668A1 (de) 2017-07-07 2017-07-07 Verfahren zum Herstellen eines Gehäuseteils einer Hörvorrichtung, Gehäuseteil für eine Hörvorrichtung und Hörvorrichtung

Publications (2)

Publication Number Publication Date
EP3425927A1 EP3425927A1 (fr) 2019-01-09
EP3425927B1 true EP3425927B1 (fr) 2020-08-12

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EP18177395.3A Active EP3425927B1 (fr) 2017-07-07 2018-06-12 Procédé de fabrication d'une partie de boîtier d'un dispositif d'aide auditive, partie de boîtier pour un dispositif d'aide auditive et dispositif d'aide auditive

Country Status (5)

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US (1) US10645503B2 (fr)
EP (1) EP3425927B1 (fr)
CN (1) CN109218949B (fr)
DE (1) DE102017211668A1 (fr)
DK (1) DK3425927T3 (fr)

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EP3863302A1 (fr) 2020-02-04 2021-08-11 Sonova AG Coque pour un dispositif d'aide auditive intra-auriculaire et son procédé de production

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US20190014427A1 (en) 2019-01-10
CN109218949B (zh) 2021-09-07
EP3425927A1 (fr) 2019-01-09
US10645503B2 (en) 2020-05-05
DK3425927T3 (da) 2020-11-16
DE102017211668A1 (de) 2019-01-10
CN109218949A (zh) 2019-01-15

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