EP0410034B1 - Method and device for manufacturing a housing shell for an in-the-ear hearing aid, and a housing shell produced according to this method - Google Patents
Method and device for manufacturing a housing shell for an in-the-ear hearing aid, and a housing shell produced according to this method Download PDFInfo
- 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
Links
- 238000000034 method Methods 0.000 title claims description 15
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000011257 shell material Substances 0.000 claims abstract description 80
- 239000000463 material Substances 0.000 claims abstract description 27
- 238000005266 casting Methods 0.000 claims abstract description 12
- 239000011324 bead Substances 0.000 claims description 14
- 239000004033 plastic Substances 0.000 claims description 14
- 229920003023 plastic Polymers 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 6
- 238000003801 milling Methods 0.000 claims description 4
- 208000032041 Hearing impaired Diseases 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000006116 polymerization reaction Methods 0.000 claims description 3
- 238000001746 injection moulding Methods 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims description 2
- 230000000379 polymerizing effect Effects 0.000 claims 2
- 150000001875 compounds Chemical class 0.000 abstract description 4
- 238000013022 venting Methods 0.000 abstract description 4
- 229920001296 polysiloxane Polymers 0.000 description 9
- 210000000613 ear canal Anatomy 0.000 description 5
- 238000009423 ventilation Methods 0.000 description 5
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 4
- 239000004926 polymethyl methacrylate Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 210000003454 tympanic membrane Anatomy 0.000 description 2
- 210000002939 cerumen Anatomy 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
Images
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
- H04R25/65—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
-
- 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)
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren zur Herstellung einer Gehäuseschale eines In-dem-Ohr-Hörgerätes. Sie bezieht sich ebenfalls auf eine Vorrichtung zur Durchführung eines solchen Verfahrens sowie auf eine Gehäuseschale, die nach dem besonders angepaßten Verfahren hergestellt ist.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.
Bei In-dem-Ohr-Hörgeräten unterscheidet man kundenspezifische Geräte (Custom Made), die entweder als Concha-Geräte überwiegend in der Ohrmuschel getragen werden und lediglich mit einem Ohranpaßstück in den Gehörgang ragen (Siemens Hinweise zur Anfertigung von Ohrpaßstücken für Im-Ohr-Geräte SIRETTINA PA 3801, Bestell-Nr. MH 170/1418, ausgegeben 1980) oder als Gehörganggeräte weitgehend im Gehörgang sitzen (DE-GM 84 36 783; EP-A-0 248 955). Außerdem sind noch Modul-Im-Ohr-Geräte bekannt (EP-A-0 206 213; DE-C-36 16 648), die aus serienmäßig gefertigten Modul-Hörgeräten bestehen, die in nach dem individuellen Abdruck des Patienten gefertigte Schalen oder Otoplastiken eingebaut werden.In the case of 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). In addition, 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.
Neben einer Schalleintrittsöffnung zum Mikrofon und einem Schallkanal vom Hörer durch einen Schallausgang zum Trommelfell des Hörgeräteträgers werden Im-Ohr-Hörgeräte mit einer weiteren Öffnung und einem Kanal versehen, der eine Belüftung des durch das Gerät an sich abgeschlossenen Gehörgangs ermöglicht. Dieser zusätzliche, auch als Vent bezeichnete Kanal kann je nach Auslegung (Verlauf, Durchmesserbohrung) neben dem Druckausgleich auch zur Beeinflussung des Frequenzganges des Hörgerätes dienen und an den Gehörschaden des Hörgeräteträgers angepaßt sein.In addition to a sound inlet opening to the microphone and a sound channel from the listener through a sound output to the eardrum of the hearing aid wearer, 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. Depending on the design (course, diameter bore), 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.
Zur Herstellung eines Im-Ohr-Gerätes mit Ventkanal wird nach einem herkömmlichen Verfahren z.B. durch den Hörgeräte-Akustiker ein positiver Abdruck vom Ohr des Hörgeschädigten hergestellt. Dieser Abdruck wird insbesondere auf der dem Trommelfell abgewandten Seite, seinem distalen Abdruckende plan beschnitten, mit einem Trennmittel versehen - zweckmäßigerweise wird der Ohrabdruck ganz in Wachs getaucht - und unter Verwendung einer passenden Schale wird eine Negativform des Ohrabdruckes gegossen. Nach der Abnahme des Ohrabdruckes aus der Negativform wird diese zur Herstellung einer Gehäuseschale für das Hörgerät mit Kunststoffmaterial (z.B. Polymethylmethacrylat, bekannt unter der Handelsbezeichnung Acryl PMMA) gefüllt. Nach kurzer Polymerisationszeit wird überschüssiges Kunststoffmaterial aus der Negativform ausgegossen. Nach dem Gießen oder Spritzen wird die Negativform mit der darin befindlichen Gehäuseschale z.B. in einen Drucktopf gesetzt und über eine Zeitdauer von etwa 10 min der Kunststoff ausgehärtet (polymerisiert). Danach wird die Gehäuseschale aus der Negativform genommen.To produce 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. After taking the ear impression from the negative mold, it is filled with plastic material (e.g. polymethyl methacrylate, known under the trade name Acryl PMMA) to produce a housing shell for the hearing aid. After a short polymerization time, excess plastic material is poured out of the negative mold. After casting or spraying, 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.
Der aus der Negativform genommene, ausgehärtere Rohling der Gehäuseschale wird, wie in Figur 5 durch die Linien c-c und e-e angedeutet, proximal und distal von überschüssigem KunststoffMaterial freigelegt. Das Freilegen erfolgt durch Schleifen oder Absägen oder Fräsen und Polieren. Außerdem wird am proximalen Ende des Gehäuseschalen-Rohlings eine Öffnung freigelegt (gebohrt, aufgefräst). Anschließend wird die Schale poliert.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. In addition, an opening is exposed (drilled, milled) at the proximal end of the housing shell blank. The shell is then polished.
Zur Herstellung eines Belüftungskanals bzw. Vent wird in zeitaufwendiger und mit großer Sorgfalt auszuführender Arbeit vom distalen oder proximalen Ende her mittels eines Fräswerkzeuges über die ganze Schalenlänge in die Innenwand der Gehäuseschale eine Rille eingearbeitet. In diese Rille wird ein Silikonschlauch, der eine Seele aus Lötzinn ummantelt, gelegt und an der Schale von außen verdrillt. Nunmehr wird eine Mischung des Schalen-Kunststoffmaterials angerührt und mit einem Werkzeug (Spatel) über den Mantel des Silikonschlauches aufgebracht, derart, daß der Schlauch im Inneren der Gehäuseschale mit Schalenmaterial durchgehend abgedeckt und eingebettet wird. Zum Aushärten des Abdeckmaterials für den Silikonschlauch wird der Rohling der Gehäuseschale nochmals für eine gewisse Zeitdauer z.B. in einen Drucktopf gesetzt. Anschließend wird das überschüssige Abdeckmaterial abgefräst und abgeschliffen, um Einbauraum in der Gehäuseschale für die Bauteile des Hörgerätes zu schaffen. Dabei ist zu beachten und zu überprüfen, daß der nach dem Herausziehen des Silikonschlauches entstehende Kanal einen geschlossenen Mantel aufweist.To produce a ventilation channel or vent, 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. Now 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. To harden 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.
Der Rohling der Gehäuseschale wird im folgenden im Concha-Bereich (distales Ende) und im Gehörgang-Bereich (proximales Ende) auf die vorgesehene Größe der Gehäuseschale zurückgeschliffen. Abschließend kann am distalen Ende eine Faceplate und am proximalen Ende eine Abschlußplatte bzw. Cerumenkappe od.dgl. angebracht werden. Dabei sind gegebenenfalls die Ein- und Austrittsöffnungen des Belüftungskanals (Vent) zu bohren. Endet der Vent vor der Cerumenkappe im Bereich des proximalen Endes, so ist eine Öffnung in die Wand der Gehäuseschale zu bohren.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.
Ein ähnliches Verfahren zur Herstellung einer Gehäuseschale eines Hörgerätes ist aus der US-A-4 569 812 bekannt. Danach wird über einen positiven Ohrabdruck vom Ohr des Hörgeschädigten und mittels eines Kerns eine Negativform hergestellt. Anhand der bearbeiteten Negativform wird zunächst eine erste dünne Gehäueschale gegossen, in die nach dem Aushärten und einer Nachbearbeitung eine Öffnung gebohrt wird. Dann wird in diese erste Gehäuseschale und durch ihre Öffnung ein Draht mit Silikonschlauchmantel gelegt. Daraufhin wird Gießmaterial eingefüllt und eine zweite Gehäuseschale mit größerer Wandstärke hergestellt. Nach dem Aushärten dieser starkwandigen Schale können der Draht mit seinem Silikonmantel entfernt und die Gehäuseschale bzw. der gebildete Ventkanal nachbearbeitet werden, wobei darauf geachtet werden muß, daß der nach dem Herausziehen des Silikonschlauches entstehende Kanal eine geschlossene Kanalwandung aufweist.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. On the basis of the machined negative mold, a first thin housing shell is first poured, into which an opening is drilled after curing and post-processing. Then 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.
Aufgabe der Erfindung ist es, ein Verfahren und eine Vorrichtung anzugeben sowie die Gehäuseschale eines Im-Ohr-Hörgerätes so auszubilden, daß sich ein Im-Ohr-Hörgerät mit weniger Aufwand herstellen und technisch verbessern läßt.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.
Diese Aufgabe wird mit den Merkmalen des Verfahrens des Anspruches 1 gelöst. Sie wird ebenfalls gelöst durch eine Vorrichtung nach Anspruch 3 zur Durchführung eines solchen Verfahrens. Eine besonders vorteilhafte, unter Anwendung des Verfahrens nach Anspruch 1 herstellbare Gehäuseschale gibt Anspruch 8 an.This object is achieved with the features of the method of claim 1. It is also solved by a device according to claim 3 for performing such a method. A particularly advantageous housing shell which can be produced using the method according to claim 1 is stated in
Nach der Erfindung kann der Kanal für die Belüftung bzw. der Venting-Kanal bereits beim Gießen oder Spritzen des Rohlings der Gehäuseschale in einem Arbeitsgang mit hergestellt werden. Dabei kann dieser Kanal oder können mehrere solcher Kanäle entsprechend den Platzverhältnissen für das Hörgerät in der Negativform wie vorgesehen verlegt und ausgerichtet werden. Die Platzverhältnisse, die Ventinggröße (Kanallänge, Kanalverlauf und Kanaldurchmesser) sind bereits in der Negativform berücksichtigbar und variierbar, d.h. die Kanallage, Kanalgröße, Kanalform usw. sind bereits in der Negativform vorbestimmbar. Es läßt sich ferner eine gleichmäßige Wandstärke des Ventingkanals gegenüber der Gehäuseschale erreichen, da der in die Gehäuseschale gleich mit eingegossene oder eingespritzte Strang-, Rohr- oder Schlauchmantel einen gleichen Abstand zum Schalenmaterial bzw. zur Schale ermöglicht. Durch Wegfall des Fräsvorganges für eine Rille, durch den Wegfall des Einbettens und des Materialauftrages auf den eingelegten Schlauch, durch den Wegfall einer zweiten Aushärt-und Wärmebehandlung und da Nacharbeiten weitgehend entfallen, wird die Herstellung der Gehäuseschale wesentlich vereinfacht und ist weniger zeitaufwendig.According to the invention, 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. By eliminating the milling process for a groove, by omitting the embedding and the application of material to the inserted hose, by dispensing with a second curing and heat treatment and since reworking is largely eliminated, the manufacture of the housing shell is considerably simplified and is less time-consuming.
Weitere Vorteile und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispieles anhand der Zeichnung und in Verbindung mit den Merkmalen der Unteransprüche.Further advantages and details of the invention emerge from the following description of an exemplary embodiment with reference to the drawing and in conjunction with the features of the subclaims.
Figur 1 zeigt einen positiven Ohrabdruck 1, der durch Abtrennen eines überstehenden Materialabschnittes 2 im Bereich seines distalen Endes, längs der Schnittlinie a-a, bzw. eines Angußstückes 3 im Bereich seines proximalen Endes, längs der Schnittlinie b-b, aus einem Rohling gewonnen wird.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.
Figur 2 zeigt den Ohrabdruck 1 gemäß Figur 1, der am gehörgangseitigen Bereich (proximalen Ende) mit einem Kern 4 bestückt und zum Gießen einer Negativform 5 in einem Behälter 6 angeordnet ist. Im Ausführungsbeispiel wird mittels eines Gefäßes 7, in dem sich ein Kunststoffmaterial, eine Gießmasse 8 od.dgl. befindet, die Negativform des Ohrabdruckes 1 gegossen. Vor dem Gießen oder Spritzen der Negativform wird der Ohrabdruck 1 zweckmäßigerweise zuerst ganz in Wachs od.dgl. getaucht, um eine Trenn- bzw. Separierschicht zu erzielen. Durch die Wachsschicht ist auch ein Ausgleich für einen eventuellen späteren Materialschwund erzielbar.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
In Figur 3 ist die Negativform 5 nach Herausnahme des Ohrabdruckes 1 und nach Abnahme des Kerns 4 dargestellt, wobei in der nunmehr mit dem Negativ des Ohrabdruckes nach oben gekippten Form im Boden der Form eine durch den Kern hinterlassene Öffnung 9 vorgesehen ist. Wie in dieser Abbildung vergrößert gezeichnet ist, wird durch die Höhlung 10 der Negativform und durch die Öffnung 9 ein flexibler Strang 11, ein Rohr, ein Schlauch od.dgl. verlegt bzw. eingezogen, derart, daß er an der Innenwand der Negativform in der Weise verläuft, wie der Verlauf eines Kanals zur Belüftung oder als Vent in der herzustellenden Gehäuseschale beabsichtigt ist.FIG. 3 shows the
Ein vergrößert dargestellter Abschnitt eines flexiblen Stranges 11 ist in einer Ausführung in Figur 4 dargestellt. Gemäß diesem Ausführungsbeispiel dient zur Herstellung des Kanals ein flexibler Strang, bestehend aus einer Seele 12 aus biegbarem Material, z.B. einem Metallfaden, einem den Metallfaden umgebenden Schlauchmantel 13 - insbesondere einem Mantel, dessen Material beim Gießen oder Spritzen der Gehäuseschale keine Verbindung mit dem Schalenmaterial eingeht - und auf dem Schlauchmantel 13 aufgereihten Kügelchen 14, Perlen od.dgl., die vorzugsweise aus ähnlichem oder demselben Kunststoffmaterial bestehen wie das Material, das zum Herstellen der Gehäuseschale verwendet wird. Der Metallfaden, z.B. Lötzinn, soll nicht federelastisch, sondern leicht und dauerhaft verformbar sein. Die die Flexibilität des Stranges 11 ermöglichenden Nischen 15 zwischen den Kügelchen 14 werden beim Gießen oder Spritzen der Gehäuseschale vom Schalenmaterial ausgefüllt, so daß eine gleichmäßig starke Wandstärke für den auszubildenden Kanal entsteht. Während der Durchmesser des zur Herstellung der Öffnung 9 in der Negativform 1 verwendeten Kerns 4 etwa dem Aussendurchmesser D des Stranges 11 bzw. nach Ausführungsbeispiel dem Außendurchmesser d des Schlauches 13 entspricht, wird mit dem Durchmesser d, gebildet von der Stärke des Metallfadens 12 oder vom Durchmesser des Silikonmantels 13 oder vom Bohrungsdurchmesser der Kügelchen 14, der lichte Querschnitt des Kanals bestimmt.An enlarged section of a
Der flexible Strang 11 trägt auf dem Abschnitt, der durch die Negativform geführt ist und der zur Bildung für einen Kanal in der Gehäuseschale dient, die Kügelchen 14 aus Polymethylmetacrylat und wird mit seinen Enden 16, 17 außen an der Negativform befestigt oder verdrillt. Es wird darauf geachtet, daß die Kügelchen 14 am vorgesehenen Verlauf an der Innenwand der Negativform anliegen, dann wird die Negativform zum Herstellen einer Gehäuseschale 18 mit Polymethylmetacrylat ausgegossen oder ausgespritzt. Dabei wird nach einer kurzen Polymerisationszeit überschüssiges Kunststoffmaterial aus der Negativform entleert und dann die Negativform z.B. in einen Drucktopf zum Aushärten der Gehäuseschale 18 gestellt.The
Beim Herstellen der Gehäuseschale 18 verbindet sich die Schalen-Guß- bzw. Spritzmasse mit den Kügelchen 14 des Stranges 11. Nach dem Aushärten der Gehäuseschale kann die Strangeinlage, im Ausführungsbeispiel der Metallfaden 12 mit Silikonmantel 13, aus dem aus Kügelchen und Schalenmasse verschmolzenen Mantel des gebildeten Kanals 19 der Gehäuseschale gezogen werden. Die in Figur 5 gezeichnete Gehäuseschale 18 wird aus der Negativform herausgenommen und es werden längs der Schnittlinien c-c bzw. e-e die überstehenden Gußreste 20, 21 abgefräst bzw. entfernt. Falls vorgesehen, kann der Kanal 19 noch aufgefräst und die Gehäuseschale poliert werden. Die Gehäuseschale 18 kann in an sich bekannter Weise noch durch eine am proximalen Ende 22 aufzusetzende Abdeckplatte und eine am distalen Ende 23 aufzusetzende Faceplate verschlossen werden. In der nicht gezeichneten Abdeckplatte wie auch in der Faceplate sind dann - falls der Kanal 19 in Längsrichtung völlig durch die Gehäuseschale verläuft - noch die Durchtrittsöffnungen zu bohren. Es ist aber auch möglich, daß die eine oder andere Durchtrittsöffnung des Kanals 19 (Vent) an einer Seitenwand der Gehäuseschale vorgesehen ist.When the
Aus der perspektivischen Darstellung nach Figur 6 ist eine, am distalen Ende der Gehäuseschale 18 befindliche Durchtrittsöffnung 24 des Kanals 19 ersichtlich, wobei die Kanalwand mit der Perlen- oder Kügelchen-Struktur ebenfalls erkennbar ist. Die am proximalen Ende vorgesehene Durchtrittsöffnung des Kanals ist mit 25 bezeichnet.6 shows a
Claims (8)
- Method for manufacturing a housing shell for an in-the-ear hearing aid by means of the following method steps:- forming a positive ear mould (1) from the ear of the hearing-impaired person,- processing the ear mould (1) to the desired size of the housing shell (18) to be manufactured,- applying a core (4) to the ear mould (1) in the proximal region on the auditory canal side,- providing the outside of the ear mould (1) with a separating layer,- forming a negative form (5) of the ear mould (1),- removing the ear mould (1) from the negative form (5) and removing the core (4),- drawing a flexible strand (11) into the negative form (5), the strand having a sleeve of plastic beads (14) which are strung together,- laying the strand (11) along the inner wall of the negative form (5),- pouring plastic into the negative form (5), the ball or bead-shaped sleeve sections (14, 15) of the strand (11) being filled up with the material of the housing shell to form a continuous channel wall and being joined so as to be materially integral with the housing shell (18) to be cast,- pouring out the excess material that is not required for the housing shell (18) to be manufactured from the negative form (5) after a short polymerization time,- hardening (polymerizing) the housing shell (18) in the negative form (5),- removing the housing shell (18) from the negative form (5) and- pulling out a strand insert (12, 13) from the channel (19) moulded into the housing shell (18) and forming a vent.
- Method according to claim 1, characterized in that the flexible strand (11) is drawn through the cavity (10) of the negative form (5) and the opening (9) in the negative form created by the core (4) and is laid in the cavity of the negative form in the desired course on the inner wall of the negative form, and the strand ends (16, 17) are fixed on the outside of the negative form.
- Apparatus for implementing the method according to one of claims 1 and 2, using- an ear mould material for the positive ear mould (1),- a cutting, milling, polishing device for processing the ear mould (1) to the desired size or shape,- a core (4) which may be attached to the ear mould (1),- an application device for a separating layer,- a form (6) for holding the ear mould (1) and for filling with a casting material (8) for the negative form (5),- a housing shell material suitable for casting or injection moulding,- a means for removing a strand insert (12, 13) from the channel (19) created in the housing shell (18),characterized by- a flexible strand (11) with a sleeve of plastic beads (14) which are strung together for placing in the negative form (5), the said strand extending through the cavity (10) of the negative form and the opening (9) thereof created by the core (4),- a device for hardening (polymerizing) the housing shell (18) and the ball or bead-shaped sleeve sections (14, 15) of the strand (11) which are joined therewith so as to be materially integral and which form a channel wall.
- Apparatus according to claim 3, characterized in that the diameter of the core (4) approximately corresponds to the strand diameter (D or d) and the inside diameter of the channel may be determined by the diameter (d) of the strand insert (12 or 13).
- Apparatus according to claim 3, characterized in that the flexible strand (11) consists of a flexible core (12) on which are strung plastic beads (14) whose bore determines the channel diameter and whose external contour is enclosed by the shell material when the housing shell is cast and forms the channel wall.
- Apparatus according to claim 3 and 5, characterized in that the core of the strand (11) consists of a material which may be pulled out of the cast channel (19) and which does not unite with the material of the housing shell.
- Apparatus according to one of claims 3 to 6, characterized in that the flexible strand (11) consists of a metal thread (12) provided with a sleeve (13), on which are strung beads (14) made of a plastic corresponding to the material of the housing shell (18).
- Housing shell for an in-the-ear hearing aid which may be manufactured according to claim 1, into which a channel (19) is moulded as a vent, the wall of which is composed of the material of a cast-in or injected strand (11), and wherein the sleeve of the strand is embedded in the material of the housing shell, characterized in that the wall of the channel (19) consists of plastic beads (14) which are strung together, the said beads having a through-bore for the channel and the ball or bead-shaped sleeve sections (14, 15) of the said beads being filled up with the material of the housing shell to form a continuous channel wall and being joined so as to be materially integral with the housing shell itself.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE58909119T DE58909119D1 (en) | 1989-07-26 | 1989-07-26 | Method and device for producing a housing shell of an in-the-ear hearing aid, and housing shell produced by the method. |
| EP89113792A EP0410034B1 (en) | 1989-07-26 | 1989-07-26 | Method and device for manufacturing a housing shell for an in-the-ear hearing aid, and a housing shell produced according to this method |
| AT89113792T ATE120065T1 (en) | 1989-07-26 | 1989-07-26 | METHOD AND DEVICE FOR PRODUCING A HOUSING SHELL OF AN IN-THE-EAR HEARING AID AND HOUSING SHELL PRODUCED BY THE METHOD. |
| US07/552,525 US5146051A (en) | 1989-07-26 | 1990-07-16 | Housing shell for an in-the-ear hearing aid |
| CA002021879A CA2021879A1 (en) | 1989-07-26 | 1990-07-24 | Housing shell for an in-the-ear hearing aid and method and apparatus for manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP89113792A EP0410034B1 (en) | 1989-07-26 | 1989-07-26 | Method and device for manufacturing a housing shell for an in-the-ear hearing aid, and a housing shell produced according to this method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0410034A1 EP0410034A1 (en) | 1991-01-30 |
| EP0410034B1 true EP0410034B1 (en) | 1995-03-15 |
Family
ID=8201686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89113792A Expired - Lifetime EP0410034B1 (en) | 1989-07-26 | 1989-07-26 | Method and device for manufacturing a housing shell for an in-the-ear hearing aid, and a housing shell produced according to this method |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5146051A (en) |
| EP (1) | EP0410034B1 (en) |
| AT (1) | ATE120065T1 (en) |
| CA (1) | CA2021879A1 (en) |
| DE (1) | DE58909119D1 (en) |
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| USD340286S (en) | 1991-01-29 | 1993-10-12 | Jinseong Seo | Shell for hearing aid |
| US5531954A (en) * | 1994-08-05 | 1996-07-02 | Resound Corporation | Method for fabricating a hearing aid housing |
| AU6439896A (en) * | 1995-09-14 | 1997-03-20 | Resound Corporation | Method for fabricating a hearing aid faceplate and a faceplate produced thereby |
| US6473511B1 (en) | 1996-03-14 | 2002-10-29 | Sarnoff Corporation | Disposable hearing aid with integral power source |
| US5881159A (en) * | 1996-03-14 | 1999-03-09 | Sarnoff Corporation | Disposable hearing aid |
| US7010137B1 (en) * | 1997-03-12 | 2006-03-07 | Sarnoff Corporation | Hearing aid |
| US6424722B1 (en) | 1997-01-13 | 2002-07-23 | Micro Ear Technology, Inc. | Portable system for programming hearing aids |
| US7787647B2 (en) | 1997-01-13 | 2010-08-31 | Micro Ear Technology, Inc. | Portable system for programming hearing aids |
| US6449662B1 (en) * | 1997-01-13 | 2002-09-10 | Micro Ear Technology, Inc. | System for programming hearing aids |
| US6283915B1 (en) | 1997-03-12 | 2001-09-04 | Sarnoff Corporation | Disposable in-the-ear monitoring instrument and method of manufacture |
| US6175633B1 (en) | 1997-04-09 | 2001-01-16 | Cavcom, Inc. | Radio communications apparatus with attenuating ear pieces for high noise environments |
| US6366863B1 (en) | 1998-01-09 | 2002-04-02 | Micro Ear Technology Inc. | Portable hearing-related analysis system |
| US6359993B2 (en) * | 1999-01-15 | 2002-03-19 | Sonic Innovations | Conformal tip for a hearing aid with integrated vent and retrieval cord |
| EP1252799B2 (en) | 2000-01-20 | 2022-11-02 | Starkey Laboratories, Inc. | Method and apparatus for fitting hearing aids |
| WO2000048443A2 (en) † | 2000-06-06 | 2000-08-24 | Phonak Ag | Hearing aid placed in the ear and method for producing same |
| AU2000253848B2 (en) * | 2000-06-30 | 2006-04-06 | Phonak Ag | Method for manufacturing an in-the-ear hearing device, and an in-the-ear hearing device |
| US7407035B2 (en) * | 2002-02-28 | 2008-08-05 | Gn Resound A/S | Split shell system and method for hearing aids |
| US7054457B2 (en) * | 2002-03-20 | 2006-05-30 | Siemens Hearing Instruments, Inc. | Hearing instrument receiver mounting arrangement for a hearing instrument housing |
| US8625834B2 (en) | 2004-09-27 | 2014-01-07 | Surefire, Llc | Ergonomic earpiece and attachments |
| JP4058698B2 (en) * | 2005-02-01 | 2008-03-12 | 株式会社須山歯研 | Ear Mold |
| USD540312S1 (en) * | 2006-03-28 | 2007-04-10 | Sound Id | Back surface configuration for ear module |
| CA2601662A1 (en) | 2006-09-18 | 2008-03-18 | Matthias Mullenborn | Wireless interface for programming hearing assistance devices |
| JP5340532B2 (en) * | 2006-10-30 | 2013-11-13 | 株式会社須山歯研 | Ear mold manufacturing method and ear mold |
| USD563945S1 (en) * | 2006-12-28 | 2008-03-11 | Shure Acquisition Holdings, Inc. | Earphone portion |
| US7875223B2 (en) * | 2008-01-24 | 2011-01-25 | Siemens Hearing Instruments, Inc. | Fabrication of a soft-silicone cover for a hearing instrument shell |
| US8636100B2 (en) * | 2008-05-15 | 2014-01-28 | Beat Bleuer | Method for the production of an otoplastic device |
| DE102011110861B4 (en) * | 2011-08-17 | 2013-06-20 | Eisenmann Ag | Method of inspecting an article with material-free areas |
| USD673530S1 (en) * | 2011-11-08 | 2013-01-01 | Verto Medical Solutions, LLC | Ear bud adapter |
| USD678868S1 (en) * | 2011-11-08 | 2013-03-26 | Verto Medical Solutions, LLC | Ear bud adapter |
| USD687021S1 (en) * | 2012-06-18 | 2013-07-30 | Imego Infinity Limited | Pair of earphones |
| USD716771S1 (en) | 2013-09-09 | 2014-11-04 | Verto Medical Solutions, LLC | Earbud |
| USD717274S1 (en) | 2013-09-09 | 2014-11-11 | Verto Medical Solutions, LLC | Cinch for earbud and earphone cords |
| USD717275S1 (en) | 2013-09-09 | 2014-11-11 | Verto Medical Solutions, LLC | Controller for earbuds and earphones |
| USD726694S1 (en) * | 2013-10-25 | 2015-04-14 | Aliphcom | Ear bud |
| USD744456S1 (en) * | 2014-01-24 | 2015-12-01 | Freebit As | Earbud |
| WO2016045709A1 (en) * | 2014-09-23 | 2016-03-31 | Sonova Ag | An impression-taking pad, a method of impression-taking, an impression, a method of manufacturing a custom ear canal shell, a custom ear canal shell and a hearing device |
| US11591431B2 (en) | 2014-10-14 | 2023-02-28 | Pr03Dure Medical Gmbh | Milling blank for the production of medical-technical molded parts |
| DE102014114895A1 (en) * | 2014-10-14 | 2016-04-14 | Dentona Ag | Milling blank for the production of medical technical moldings |
| TWD176082S (en) * | 2014-12-29 | 2016-06-01 | 三星電子股份有限公司 | Portion of cap for earphone |
| TWD176084S (en) * | 2014-12-29 | 2016-06-01 | 三星電子股份有限公司 | Portion of cap for earphone |
| USD779461S1 (en) | 2015-10-08 | 2017-02-21 | Surefire, Llc | Earpiece |
| USD832240S1 (en) | 2016-07-07 | 2018-10-30 | Gn Audio A/S | Ear gel for an earphone |
| TWD187385S (en) * | 2017-03-27 | 2017-12-21 | 金士頓數位股份有限公司 | Portion of an audio control device |
| WO2021053108A1 (en) * | 2019-09-17 | 2021-03-25 | Pro3dure Medical GmbH | Profiled ear piece and device for the generation of an ear piece |
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|---|---|---|---|---|
| US3440314A (en) * | 1966-09-30 | 1969-04-22 | Dow Corning | Method of making custom-fitted earplugs for hearing aids |
| US4569812A (en) * | 1984-06-22 | 1986-02-11 | Beltone Electronics Corporation | Process for making a hearing aid vent |
| DE8436783U1 (en) * | 1984-12-15 | 1986-04-10 | Siemens AG, 1000 Berlin und 8000 München | Hearing aid |
| 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 (en) * | 1985-06-27 | 1986-06-12 | Siemens AG, 1000 Berlin und 8000 München | Hearing aid |
| DE8613336U1 (en) * | 1986-05-16 | 1987-10-29 | Siemens AG, 1000 Berlin und 8000 München | Device for making an ear impression for subsequent production of an earmold |
| DE3616648A1 (en) * | 1986-05-16 | 1987-11-19 | Siemens Ag | In-the-ear hearing aid |
| EP0245742B1 (en) * | 1986-05-16 | 1991-01-23 | Siemens Audiologische Technik GmbH | Method and device for making an ear mould |
| DE3715082A1 (en) * | 1987-05-06 | 1988-11-17 | Siemens Ag | METHOD AND DEVICE FOR PRODUCING AN OTOPLASTIC |
| DE8816266U1 (en) * | 1988-01-19 | 1989-04-13 | Siemens AG, 1000 Berlin und 8000 München | Ear inserts for hearing aids, in particular earmolds for in-the-ear hearing aids and earmolds for behind-the-ear hearing aids |
-
1989
- 1989-07-26 EP EP89113792A patent/EP0410034B1/en not_active Expired - Lifetime
- 1989-07-26 AT AT89113792T patent/ATE120065T1/en not_active IP Right Cessation
- 1989-07-26 DE DE58909119T patent/DE58909119D1/en not_active Expired - Fee Related
-
1990
- 1990-07-16 US US07/552,525 patent/US5146051A/en not_active Expired - Fee Related
- 1990-07-24 CA CA002021879A patent/CA2021879A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EP0410034A1 (en) | 1991-01-30 |
| ATE120065T1 (en) | 1995-04-15 |
| DE58909119D1 (en) | 1995-04-20 |
| CA2021879A1 (en) | 1991-01-27 |
| US5146051A (en) | 1992-09-08 |
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