EP0410034B1 - Procédé et dispositif pour la fabrication d'une coque de boîtier d'une prothèse auditive intra-auriculaire et boîtier obtenu selon ce procédé - Google Patents

Procédé et dispositif pour la fabrication d'une coque de boîtier d'une prothèse auditive intra-auriculaire et boîtier obtenu selon ce procédé Download PDF

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Publication number
EP0410034B1
EP0410034B1 EP89113792A EP89113792A EP0410034B1 EP 0410034 B1 EP0410034 B1 EP 0410034B1 EP 89113792 A EP89113792 A EP 89113792A EP 89113792 A EP89113792 A EP 89113792A EP 0410034 B1 EP0410034 B1 EP 0410034B1
Authority
EP
European Patent Office
Prior art keywords
housing shell
strand
channel
negative form
ear
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
EP89113792A
Other languages
German (de)
English (en)
Other versions
EP0410034A1 (fr
Inventor
Dietmar Hermann
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 Audiologische 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 Audiologische Technik GmbH filed Critical Siemens Audiologische Technik GmbH
Priority to DE58909119T priority Critical patent/DE58909119D1/de
Priority to AT89113792T priority patent/ATE120065T1/de
Priority to EP89113792A priority patent/EP0410034B1/fr
Priority to US07/552,525 priority patent/US5146051A/en
Priority to CA002021879A priority patent/CA2021879A1/fr
Publication of EP0410034A1 publication Critical patent/EP0410034A1/fr
Application granted granted Critical
Publication of EP0410034B1 publication Critical patent/EP0410034B1/fr
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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • 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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Electric hearing aids
    • H04R25/65—Housing parts, e.g. shells, tips or moulds, or their manufacture
    • H04R25/658—Manufacture of housing parts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/30—Use of anatomy in making a mold or using said mold

Definitions

  • the invention relates to a method for producing a housing shell of an in-the-ear hearing device. It also relates to a device for carrying out such a method and to a housing shell which is produced by the specially adapted method.
  • in-the-ear hearing aids a distinction is made between customer-specific devices (custom made), which are either worn as concha devices predominantly in the auricle and only protrude into the ear canal with an ear adapter (Siemens information on the production of ear adapters for in-ear SIRETTINA PA 3801 devices, order no.MH 170/1418, issued 1980) or as ear canal devices are largely in the ear canal (DE-GM 84 36 783; EP-A-0 248 955).
  • module-in-the-ear devices are known (EP-A-0 206 213; DE-C-36 16 648), which consist of series-produced module hearing aids, which are made into shells or otoplastics made according to the patient's individual impression to be built in.
  • in-ear hearing aids are provided with a further opening and a channel which enables ventilation of the auditory canal which is closed off by the device itself.
  • this additional channel also referred to as a vent, can serve not only to equalize pressure but also to influence the frequency response of the hearing aid and to be adapted to the hearing damage of the hearing aid wearer.
  • an in-the-ear device with a vent channel e.g. a positive impression is made by the hearing aid acoustician of the hearing impaired person.
  • This impression is especially trimmed on the side facing away from the eardrum, its distal end of the impression, provided with a release agent - the ear impression is expediently dipped entirely in wax - and a negative mold of the ear impression is cast using a suitable shell.
  • plastic material e.g. polymethyl methacrylate, known under the trade name Acryl PMMA
  • excess plastic material is poured out of the negative mold.
  • the negative mold with the housing shell located therein is e.g. placed in a pressure pot and the plastic cured (polymerized) over a period of about 10 minutes. Then the housing shell is removed from the negative mold.
  • the hardened blank of the housing shell, taken from the negative mold, is exposed, as indicated in FIG. 5 by the lines c-c and e-e, proximally and distally of excess plastic material.
  • the exposure is done by grinding or sawing or milling and polishing.
  • an opening is exposed (drilled, milled) at the proximal end of the housing shell blank.
  • the shell is then polished.
  • a groove is machined into the inner wall of the housing shell from the distal or proximal end using the milling tool over the entire length of the shell in a time-consuming and very careful process.
  • a silicone tube that encases a core of solder is placed in this groove and twisted on the shell from the outside.
  • a mixture of the Shell plastic material mixed and applied with a tool (spatula) over the jacket of the silicone hose, such that the hose inside the housing shell is continuously covered with shell material and embedded.
  • the covering material for the silicone tube the blank of the housing shell is again placed in a pressure pot for a certain period of time, for example.
  • the excess covering material is then milled off and ground to create installation space in the housing shell for the components of the hearing aid. It is important to note and check that the duct created after the silicone hose is pulled out has a closed jacket.
  • the blank of the housing shell is subsequently ground back to the intended size of the housing shell in the concha area (distal end) and in the ear canal area (proximal end). Finally, a faceplate at the distal end and an end plate or cerumen cap or the like at the proximal end. be attached. If necessary, the inlet and outlet openings of the ventilation duct (vent) must be drilled. If the vent ends in front of the wax cap in the area of the proximal end, an opening must be drilled in the wall of the housing shell.
  • a similar method for producing a housing shell of a hearing aid is known from US-A-4 569 812.
  • a negative mold is then made from the hearing-impaired person's ear using a positive ear impression and a core.
  • a first thin housing shell is first poured, into which an opening is drilled after curing and post-processing.
  • a wire with a silicone tube sheath is placed in this first housing shell and through its opening.
  • Casting material is then poured in and a second housing shell with a larger wall thickness is produced. After this thick-walled shell has hardened, the wire with its silicone sheath can be removed and the housing shell or the vent channel formed can be reworked, care must be taken to ensure that the channel formed after pulling out the silicone tube has a closed channel wall.
  • the object of the invention is to provide a method and a device and to design the housing shell of an in-the-ear hearing device in such a way that an in-the-ear hearing device can be produced and improved technically with less effort.
  • the channel for the ventilation or the venting channel can already be produced in one operation during the casting or injection molding of the blank of the housing shell.
  • This channel or several such channels can be laid and aligned as intended in the negative form according to the space available for the hearing aid.
  • the space, the venting size (channel length, channel profile and channel diameter) can be taken into account and varied in the negative form, i.e. the channel position, channel size, channel shape etc. can already be predetermined in the negative form. It is also possible to achieve a uniform wall thickness of the venting channel with respect to the housing shell, since the strand, tube or hose jacket which is cast or injected into the housing shell enables the same distance to the shell material or to the shell.
  • FIG. 1 shows a positive ear impression 1, which is obtained from a blank by cutting off a protruding material section 2 in the area of its distal end, along the section line a-a, or a sprue 3 in the area of its proximal end, along the section line b-b.
  • FIG. 2 shows the ear impression 1 according to FIG. 1, which is equipped with a core 4 on the region of the ear canal (proximal end) and is arranged in a container 6 for casting a negative mold 5.
  • a vessel 7 in which a plastic material, a casting compound 8 or the like. is located, the negative form of the earprint 1 cast.
  • the ear impression 1 is expediently made entirely of wax or the like first. dipped to achieve a separation or separation layer. The wax layer also makes it possible to compensate for any subsequent material loss.
  • FIG. 3 shows the negative mold 5 after the ear impression 1 has been removed and the core 4 has been removed, the opening in the bottom of the mold, which is now tilted upwards with the negative of the ear impression, being provided with an opening 9 left by the core.
  • a flexible strand 11 consisting of a core 12 made of bendable material, for example a metal thread, is used to manufacture the channel, in particular a jacket 13 surrounding the metal thread - in particular a jacket, the material of which does not form a connection with the shell material when the housing shell is cast or sprayed - And on the hose jacket 13 lined up beads 14, beads or the like, which preferably consist of the same or the same plastic material as the material used to manufacture the housing shell.
  • the metal thread eg solder, should not be resilient, but should be easily and permanently deformable.
  • the niches 15 that allow the flexibility of the strand 11 between the beads 14 are filled with the shell material when casting or spraying the housing shell, so that a uniformly thick wall is created for the channel to be formed. While the diameter of the core 4 used to produce the opening 9 in the negative mold 1 corresponds approximately to the outer diameter D of the strand 11 or, according to the exemplary embodiment, the outer diameter d of the tube 13, the diameter d is formed by the thickness of the metal thread 12 or by Diameter of the silicone jacket 13 or from the bore diameter of the beads 14, the clear cross section of the channel determines.
  • the flexible strand 11 carries the beads 14 made of polymethyl methacrylate on the section which is guided through the negative mold and which is used to form a channel in the housing shell and is attached or twisted with its ends 16, 17 to the outside of the negative mold. Care is taken to ensure that the beads 14 rest against the inner wall of the negative mold along the intended course, then the negative mold is poured or injected with polymethyl methacrylate to produce a housing shell 18. After a short polymerization time, excess plastic material is emptied from the negative mold and then the negative mold e.g. placed in a pressure pot for curing the housing shell 18.
  • the shell casting or injection compound connects to the balls 14 of the strand 11.
  • the strand insert in the exemplary embodiment the metal thread 12 with a silicone jacket 13
  • the housing shell 18 shown in FIG. 5 is removed from the negative mold and the excess casting residues 20, 21 are milled or removed along the cutting lines cc and ee. If provided, the channel 19 can still be milled and the housing shell polished.
  • the housing shell 18 can in can be closed in a manner known per se by a cover plate to be placed on the proximal end 22 and a faceplate to be placed on the distal end 23.
  • the channel 19 runs completely through the housing shell in the longitudinal direction, the through openings must still be drilled.
  • one or the other passage opening of the channel 19 is provided on a side wall of the housing shell.
  • FIG. 6 shows a passage opening 24 of the channel 19 located at the distal end of the housing shell 18, the channel wall with the pearl or bead structure also being recognizable.
  • the passage opening of the channel provided at the proximal end is designated by 25.

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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)
  • Headphones And Earphones (AREA)

Claims (8)

  1. Procédé pour fabriquer une coque de boîtier d'un appareil de correction auditive à placer dans l'oreille, au moyen des étapes opératoires suivantes:
    - fabrication d'une empreinte positive (1) de l'oreille du malentendant,
    - traitement de l'empreinte (1) de l'oreille pour l'amener à la taille prévue de la coque de boîtier (18) devant être fabriquée,
    - montage d'un noyau (4) sur l'empreinte (1) de l'oreille dans la zone proximale située du côté du conduit auditif,
    - application d'une couche de séparation sur la face extérieure de l'empreinte (1) de l'oreille,
    - fabrication d'un moule femelle (5) de l'empreinte (1) de l'oreille,
    - sortie de l'empreinte (1) de l'oreille du moule femelle (5) et enlèvement du noyau (4),
    - introduction d'un cordon souple (11) dans le moule femelle (5), le cordon comportant une gaine de perles (14) de matière plastique juxtaposées,
    - pose du cordon (11) le long de la paroi intérieure du moule femelle (5),
    - coulée de matière plastique dans le moule femelle (5), les parties en forme de billes ou de perles (14, 15) de la gaine du cordon (11) étant remplies par le matériau de la coque de boîtier pour former une paroi de canal continue et étant reliées, d'un seul tenant du point de vue du matériau, à la coque de boîtier (18) devant être coulée,
    - évacuation du matériau en excès, non nécessaire pour la coque de boîtier (10) devant être fabriquée, du moule femelle (5) après une brève durée de polymérisation,
    - durcissement (polymérisation) de la coque de boîtier (18) dans le moule femelle (5),
    - sortie de la coque de boîtier (18) du moule femelle (5), et
    - retrait d'un insert en forme de cordon (12,13) du canal (19) formé par moulage dans la coque de boîtier (18) et constituant un évent.
  2. Procédé suivant la revendication 1, caractérisé par le fait qu'on tire le cordon souple (11) par l'empreinte (10) du moule femelle (5) et par l'ouverture (9) formée par le noyau (4) dans le moule femelle, et on le met dans l'empreinte du moule en creux, avec la disposition prévue contre la paroi intérieure du moule femelle, et on fixe les extrémités (16,17) du cordon sur la face extérieure du moule femelle.
  3. Dispositif pour la mise en oeuvre du procédé suivant l'une des revendications 1 et 2, en utilisant
    - une composition pour réaliser l'empreinte positive (1) de l'oreille,
    - un dispositif de découpage, fraisage, meulage pour donner à l'empreinte (1) de l'oreille la taille et la forme prévues,
    - un noyau (4) pouvant être enfiché dans l'empreinte (1) de l'oreille,
    - un dispositif de dépôt pour l'application d'une couche de séparation,
    - un moule (6) de réception de l'empreinte (1) de l'oreille et utilisé pour le remplissage d'une composition de coulée (8) pour le moule femelle (5),
    - un matériau pouvant être coulé ou moulé par injection, pour la coque du boîtier,
    - un système de sortie d'un insert en forme de cordon (12,13) du canal (19) formé dans le coque de boîtier,
    caractérisé par
    - un cordon souple (11) comportant une gaine formée de perles (14) juxtaposées en matière plastique, destiné à être inséré dans le moule femelle (5) et qui s'étend dans l'empreinte (10) du moule femelle et dans son ouverture (9) formée par le noyau (4),
    - un dispositif pour faire durcir (polymériser) la coque du boîtier (18) et les parties (14, 15) de la gaine du cordon (11), qui se présentent sous la forme de billes ou de perles, qui sont reliées à la coque de boîtier d'une manière unitaire du point de vue du matériau et qui forment une paroi du canal.
  4. Dispositif suivant la revendication 3, caractérisé par le fait que le diamètre du noyau (4) correspond approximativement au diamètre (D ou d) du cordon, et que le diamètre intérieur du canal peut être déterminé par le diamètre (d) de l'insert en forme de cordon (12 ou 13).
  5. Dispositif suivant la revendication 3, caractérisé par le fait que le cordon souple (11) est constitué d'une âme flexible (12), sur laquelle sont enfilées des perles (14) de matière plastique dont le perçage détermine le diamètre du canal et dont le contour extérieur est entouré, lors de la coulée de la coque de boîtier, du matériau de la coque et forme la paroi du canal.
  6. Dispositif suivant la revendication 3 ou 5, caractérisé par le fait que l'âme du cordon (11) est en un matériau qui peut être retiré du canal coulé (19) et qui ne se lie pas au matériau de la coque de boîtier.
  7. Dispositif suivant l'une des revendications 3 à 6, caractérisé par le fait que le cordon souple (11) est constitué d'un fil métallique (12), qui est pourvu d'une gaine (13) et sur lequel sont enfilées des perles (14) réalisées en une matière plastique qui correspond au matériau de la coque de boîtier (18).
  8. Coque de boîtier d'un appareil de correction auditive destiné à être placé dans l'oreille, pouvant être fabriquée suivant la revendication 1 et dans laquelle est formé par moulage, en tant qu'évent, un canal (19) dont la paroi est en un matériau d'un cordon (11) coulé ou moulé par injection, la gaine du cordon étant enrobée dans le matériau de la coque du boîtier, caractérisée par le fait que la paroi du canal (19) est constituée de perles de matière plastique (14) qui sont disposées les unes à côté des autres en une rangée et qui ont, pour le canal, un perçage continu et dont les parties (14,15), en forme de billes ou de perles, de la gaine sont remplies du matériau de la coque de boîtier pour former une paroi continue du canal et sont reliées à la coque du boîtier elle-même d'une manière unitaire du point de vue du matériau.
EP89113792A 1989-07-26 1989-07-26 Procédé et dispositif pour la fabrication d'une coque de boîtier d'une prothèse auditive intra-auriculaire et boîtier obtenu selon ce procédé Expired - Lifetime EP0410034B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE58909119T DE58909119D1 (de) 1989-07-26 1989-07-26 Verfahren und Vorrichtung zur Herstellung einer Gehäuseschale eines In-dem-Ohr-Hörgerätes sowie nach dem Verfahren hergestellte Gehäuseschale.
AT89113792T ATE120065T1 (de) 1989-07-26 1989-07-26 Verfahren und vorrichtung zur herstellung einer gehäuseschale eines in-dem-ohr-hörgerätes sowie nach dem verfahren hergestellte gehäuseschale.
EP89113792A EP0410034B1 (fr) 1989-07-26 1989-07-26 Procédé et dispositif pour la fabrication d'une coque de boîtier d'une prothèse auditive intra-auriculaire et boîtier obtenu selon ce procédé
US07/552,525 US5146051A (en) 1989-07-26 1990-07-16 Housing shell for an in-the-ear hearing aid
CA002021879A CA2021879A1 (fr) 1989-07-26 1990-07-24 Coquille pour prothese acoustique se portant dans l'oreille et methode et appareil pour sa production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89113792A EP0410034B1 (fr) 1989-07-26 1989-07-26 Procédé et dispositif pour la fabrication d'une coque de boîtier d'une prothèse auditive intra-auriculaire et boîtier obtenu selon ce procédé

Publications (2)

Publication Number Publication Date
EP0410034A1 EP0410034A1 (fr) 1991-01-30
EP0410034B1 true EP0410034B1 (fr) 1995-03-15

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EP89113792A Expired - Lifetime EP0410034B1 (fr) 1989-07-26 1989-07-26 Procédé et dispositif pour la fabrication d'une coque de boîtier d'une prothèse auditive intra-auriculaire et boîtier obtenu selon ce procédé

Country Status (5)

Country Link
US (1) US5146051A (fr)
EP (1) EP0410034B1 (fr)
AT (1) ATE120065T1 (fr)
CA (1) CA2021879A1 (fr)
DE (1) DE58909119D1 (fr)

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DE8436783U1 (de) * 1984-12-15 1986-04-10 Siemens AG, 1000 Berlin und 8000 München Hörgerät
US4712245A (en) * 1985-01-24 1987-12-08 Oticon Electronics A/S In-the-ear hearing aid with the outer wall formed by rupturing a two-component chamber
US4617429A (en) * 1985-02-04 1986-10-14 Gaspare Bellafiore Hearing aid
DE8518681U1 (de) * 1985-06-27 1986-06-12 Siemens AG, 1000 Berlin und 8000 München Hörhilfe
DE8613336U1 (de) * 1986-05-16 1987-10-29 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zur Herstellung eines Ohrabdrucks zur nachfolgenden Herstellung einer Otoplastik
DE3616648A1 (de) * 1986-05-16 1987-11-19 Siemens Ag In-dem-ohr-hoergeraet
EP0245742B1 (fr) * 1986-05-16 1991-01-23 Siemens Audiologische Technik GmbH Méthode et dispositif de fabrication d'un embout auriculaire
DE3715082A1 (de) * 1987-05-06 1988-11-17 Siemens Ag Verfahren und vorrichtung zur herstellung einer otoplastik
DE8816266U1 (de) * 1988-01-19 1989-04-13 Siemens AG, 1000 Berlin und 8000 München Ohreinsatz für Hörgeräte, insbesondere Otoplastik für In-dem-Ohr-Hörgeräte und Ohrpaßstück für Hinter-dem-Ohr-Hörgeräte

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US5146051A (en) 1992-09-08
ATE120065T1 (de) 1995-04-15
EP0410034A1 (fr) 1991-01-30
CA2021879A1 (fr) 1991-01-27
DE58909119D1 (de) 1995-04-20

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