EP3614699B1 - Instrument auditif doté d'une unité d'accouplement destiné à supporter un écouteur par amortissement de vibrations - Google Patents

Instrument auditif doté d'une unité d'accouplement destiné à supporter un écouteur par amortissement de vibrations Download PDF

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Publication number
EP3614699B1
EP3614699B1 EP19185642.6A EP19185642A EP3614699B1 EP 3614699 B1 EP3614699 B1 EP 3614699B1 EP 19185642 A EP19185642 A EP 19185642A EP 3614699 B1 EP3614699 B1 EP 3614699B1
Authority
EP
European Patent Office
Prior art keywords
receiver
coupling unit
hearing instrument
damping
hearing
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.)
Active
Application number
EP19185642.6A
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German (de)
English (en)
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EP3614699A1 (fr
Inventor
Uwe Flaig
Hartmut Ritter
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 Pte Ltd
Original Assignee
Sivantos Pte Ltd
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Filing date
Publication date
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Publication of EP3614699A1 publication Critical patent/EP3614699A1/fr
Application granted granted Critical
Publication of EP3614699B1 publication Critical patent/EP3614699B1/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
    • H04R25/60—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/45—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/45—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback
    • H04R25/456—Prevention of acoustic reaction, i.e. acoustic oscillatory feedback mechanically
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/60—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles
    • H04R25/604—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles of acoustic or vibrational transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/43—Signal processing in hearing aids to enhance the speech intelligibility

Definitions

  • the invention relates to a hearing instrument according to the preamble of claim 1.
  • a “hearing instrument” is generally used to refer to devices that pick up ambient sound, modify the signal and emit a modified sound signal to the hearing of a person wearing the hearing instrument ("wearer").
  • a hearing instrument which is designed to supply a hearing-impaired wearer and which processes, in particular amplifies, acoustic ambient signals in such a way that the hearing impairment is fully or partially compensated for is referred to here and below as a “hearing aid”.
  • a hearing device usually includes an input converter, for example in the form of a microphone, a signal processing unit with an amplifier, and an output converter.
  • the output converter is usually implemented as a miniature loudspeaker and is also referred to as a "listener" (receiver).
  • hearing instruments that are designed to fit people with normal hearing, in order to protect the hearing of the respective wearer or to support noise perception (e.g. understanding speech in complex noise environments) for specific purposes.
  • Such hearing instruments are often constructed in a similar way to hearing aids and in particular also include the input converter, signal processing and output converter components mentioned above.
  • BTE hearing instruments Behind-The-Ear, also behind-the-ear, BTE for short
  • a housing equipped with the input converter, the signal processing and a battery is worn behind the ear.
  • the receiver can be arranged directly in the ear canal of the wearer (so-called ex-receiver hearing instruments or receiver-in-the-canal, RIC hearing instruments for short).
  • the handset is located within the housing itself.
  • a flexible sound tube also known as a "tube,” directs the receiver's acoustic output signals from the housing to the ear canal (tube hearing instruments).
  • ITE hearing instruments in-the-ear, also in-the-ear, ITE for short
  • CIC hearing instruments are similar to ITE hearing instruments, but are worn completely in the ear canal.
  • the receiver must be mounted securely and, in particular, vibration-dampened in the housing of the hearing instrument, in particular to prevent sound transmission (in the form of structure-borne noise or airborne noise) within the housing and the resulting acoustic feedback between the receiver and a microphone of the hearing instrument and vibrational movements of the entire housing.
  • the receiver of a hearing instrument is usually mounted with individually shaped bearings that are adapted to the respective receiver design and to the available space in the hearing instrument as well as to the performance of the hearing instrument and that are regularly attached to the housing of the hearing instrument support the hearing instrument.
  • the damping of a receiver by means of a rubber band or a rubber bag, which is wrapped around the rear part of the receiver, is common, so that bumping into the hard housing wall of the housing of the hearing instrument is avoided.
  • listeners are often enclosed in chambers made of plastic or metal in order to prevent airborne noise from being transmitted within the housing of the respective hearing instrument as far as possible.
  • a hearing instrument according to the preamble of claim 1 is made WO 00/69216 A2 known.
  • a hearing instrument with a damping element made of a dimensionally stable damping material is made of DE 10 2010 009 782 A1 known.
  • the damping element is inserted here between a housing and an electronics frame of the hearing instrument.
  • an ear microphone with an optional receiver is known.
  • the receiver is mounted on a receiving piece of the ear microphone via a receiver damper.
  • the object of the invention is to enable a receiver to be mounted securely and in a vibration-damped manner within a hearing instrument.
  • An elastic coupling is understood to be a mechanical coupling between the earphone and the at least one other component, which allows a relative movement of the earphone and the at least one other component, namely a deflection of the relative position from a rest position at least to a certain extent, but this deflection creates a restoring force opposes.
  • an elastic force transmission through the physical coupling unit is always associated with friction and thus with a loss of mechanical energy.
  • the invention is based on the consideration that directly or indirectly mounting the receiver on the housing wall of the hearing instrument is counterproductive for the intended effect of vibration and sound damping can be, since vibrations of the listener - to the extent that they are not intercepted by an optionally interposed damping - are coupled into the housing and thus unintentionally transmitted comparatively effectively.
  • the invention also takes into account the experience that other components of the hearing instrument, in particular the battery, can amplify the vibrations caused by the listener if such components are set in motion by these vibrations themselves. Under unfavorable circumstances, resonance effects or mechanical feedback of the vibrations of the receiver and the battery or another component of the hearing instrument can occur.
  • the induced vibration of internal components can also cause the housing of the hearing instrument to sway noticeably (and thus be uncomfortable for the wearer).
  • conventional hearing aids can only be operated with a comparatively low amplification, particularly in the high frequency ranges.
  • the at least one further component with which the receiver is elastically coupled via the coupling unit is a battery and/or an electronic frame of the hearing instrument—which is optionally present.
  • an electronics frame is understood to mean a mechanical support structure which is separate from the housing of the hearing instrument and on which at least one electronic component, in particular a signal processing unit, of the hearing instrument is held. All of the electronics of the hearing instrument or at least a large part of them is usually mounted on the electronics frame. In order to simplify the manufacturing process, the electronics frame allows the electronics of the hearing instrument to be completely or partially preassembled outside of the housing and, if necessary, to be tested and inserted into the housing in an already preassembled state.
  • the battery and the electronics frame that may be present and equipped are usually the heaviest components of the hearing instrument.
  • the elastic coupling of the earphone with at least one of these components is therefore particularly advantageous for vibration-damping anchoring of the earphone.
  • high vibration frequencies are particularly effectively damped by the high weight of the assembly formed from the receiver, the coupling unit and the battery and/or the electronics frame.
  • the coupling unit is designed with a damping body made of rubber or an elastomer material, which is connected on the one hand to the receiver and on the other hand to the at least one other component, i.e. in particular the Battery and / or the electronics frame is directly or indirectly coupled.
  • the coupling unit comprises, in addition to the damping body, an elastic damping element which acts directly on the receiver for supporting it, and a cage surrounding this damping element, to which the damping body is fixed.
  • This cage which is thus interposed in terms of force transmission between the (listener-side) damping element and the damping body (facing the further component), is in particular made of a harder material than the damping element and the damping body.
  • both the elastic damping element and the damping body have a lower hardness than the cage.
  • This sequence of - seen from the listener - soft material of the damping element, the hard material of the cage and the soft material of the damping body has turned out to be particularly suitable for a stable but at the same time effective vibration-damping mounting of the earphone in both high and low frequency ranges.
  • the elastic damping element has a lower hardness than the damping body.
  • the coupling unit has at least one fixing element for the non-positive fixing of the at least one further component.
  • the coupling unit includes two spaced opposite fixing elements that clamp the battery between them.
  • the non-positive fixing i.e. the fixing of the further component by exerting a transverse force by means of the fixing element, so that a relative movement of the further component in relation to this fixing element is only possible by overcoming a static friction force
  • the further component is advantageously held free of play, which means that even small vibration amplitudes are dampened and hard impacts between the other component and the coupling unit are avoided.
  • the coupling unit and in particular the or each fixing element are designed in terms of their shape (e.g. by a chamfer, lamellae, cavities or other surface structures) and the material properties (e.g. coefficient of friction, hardness, elasticity, memory effect, etc.) in such a way that the expected Manufacturing tolerances of the other components are compensated; that e.g. the batteries, which are partly larger and partly smaller within the scope of the manufacturing tolerances, are always kept sufficiently.
  • the or each fixing element is preferably designed in one piece with the damping body in the sense of a simple but effective design of the coupling unit.
  • this is also used to make electrical contact with the battery and/or an electronic component of the hearing aid.
  • corresponding electrical connections are made in the coupling unit, and here in particular in the optionally existing fixing element or at least one of the fixing elements that may be present is integrated.
  • a hearing instrument 2 in the form of a (BTE) hearing device to be worn behind the ear of a hearing-impaired wearer is shown in a roughly schematic manner.
  • the hearing instrument 2 comprises a housing 4, in which the main components are a receiver 6, two microphones 8, a signal processing unit 10 with a digital Signal processor and / or a microcontroller and a battery 12 are arranged.
  • the electronics frame 14 is a frame made separately from the housing 4, in particular made of plastic, on which the associated electrical and electronic components, in particular the signal processing unit 10 and the microphones 8, can be preassembled outside of the housing 4.
  • the receiver 6 , the battery 12 and the electronics frame 14 fitted with the signal processing unit 10 and the microphones 8 are in turn elastically coupled to one another via a coupling unit 16 .
  • the signal processing unit 10 is also electrically connected to the receiver 6 or the battery 12 by means of electrical lines 18 and 20 via the coupling unit 16 .
  • the sound generated by the receiver 6 is guided to an opening 24 at a tip of the housing 4 by means of a sound tube 22 . From there, the sound is conducted into the wearer's ear via an extension of the sound tube 22 (not shown explicitly).
  • the coupling unit 16 is in the Figures 2 to 5 shown in detail.
  • the internal structure of the receiver 6 and the battery 12 is shown in the sectional views according to FIG Figures 3 and 4 not shown explicitly for reasons of simplification.
  • the coupling unit 16 comprises a damping element 26 for mounting the receiver 6, a cage 28 surrounding it and a damping body 30 arranged between the cage 28 and the battery 12.
  • a cap 32 is placed on the cage 28 on the side of the cage 28 facing away from the battery 12 .
  • This cap 32 does not contribute directly to the elastic coupling between the earpiece 6, the battery 12 and the signal processing unit 14.
  • the cap 32 acts but in the manner described in more detail below with the damping element 26, the cage 28 and the damping body 30 to the Sound insulation of the handset 6 together. In this respect, it is also regarded as a functional component of the coupling unit 16 .
  • the recognizable cage 28 is formed by a tubular or tube-like base body 34 made of a dimensionally stable plastic, namely polyamide or polycarbonate, reinforced or unreinforced.
  • the base body 34 consists of a metal, for example sheet steel.
  • the base body 34 has an approximately quadrangular cross-section adapted to the earpiece 6 and completely encloses the side surfaces of the earpiece 6 .
  • a sound outlet 35 of the receiver 6 and a rear side of the receiver 6 opposite the sound outlet 35 are arranged on the open sides of the base body 34 .
  • the cage 28 is provided on all four side surfaces figure 5 provided with openings 36 (that is, openings that extend from the inner circumference of the base body 34 to its outer circumference).
  • the damping element 26 consists of a number of unconnected holding projections in the form of hollow conical knobs 38, the distal ends of which (i.e. facing away from the inner circumference of the base body 34) each form a contact surface 40 for the receiver 6.
  • the conical knobs 38 are formed from an elastic material (e.g. a fluoroelastomer and/or a fluorosilicone elastomer which is softer than the material of the cage 28 and has a Shore hardness (Shore A) of 20-25, in particular 23 having.
  • One of the knobs 38 is introduced, in particular injected, into each opening 36 of the cage 28 .
  • the cage 28 and the damping element 26 are preferably manufactured together in a two-component injection molding process.
  • the damping body 30 is also made of an elastic material (eg "Viton"). This material is preferably selected in such a way that the damping body 30 is harder than the nubs 38 of the damping element 26, but softer than the cage 28.
  • the material of the damping body 30 has a Shore hardness (Shore A) of 50-70, in particular 65.
  • the cap 32 is preferably made from a harder material than the damping body 30, e.g. from a dimensionally stable plastic. In an alternative embodiment, it is made from the same material as the damping body 30.
  • the damping body 30 and the cap 32 are sealingly fitted onto the cage 28 so that they form an airtight shell or box around an air space in which the handset 6 is mounted.
  • the cap 32 has a passage 41 through which the sound tube 22 connected to the sound outlet 35 of the receiver 6 is passed.
  • Two fixing elements in the form of clasps 42 are formed on an end of the damping body 30 facing the battery 12, which face one another at a distance and clamp the battery 12 between them.
  • the battery 12 is thus fixed to the damping body 30 in a non-positive manner (and therefore without play) by the clips 42 .
  • Electrical contacts 44 for contacting the battery 12 are integrated on the mutually facing inner surfaces of the clips 42, which in turn are connected to the 1 indicated line 20 are connected.
  • a further fixing element in the form of a pin 46 with a T-shaped cross section is integrally formed on the damping body 30 .
  • the pin 46 is used to hold the electronics frame 14 on the damping body 30 and for this purpose is pushed into a corresponding T-slot (not shown) of the electronics frame 14 .
  • the pin 46 is manufactured with a specified oversize relative to the T-slot of the electronics frame 14, so that the pin 46 acts on the walls of the T-slot and the electronics frame 14 is thus not only positively but also non-positively (and thus in turn free of play) on the damping body 30 fixed.
  • electrical Integrated contacts via which the in 1 indicated lines 18 and 20 are contacted with the signal processing unit 10 .
  • a small projection 47 made of a soft material is also formed on the rear wall of the damping body 30 facing the battery 12 and acts as a tolerance compensation in order to be able to securely accommodate batteries 12 with sizes that vary due to production.
  • the receiver 6 is elastically coupled to the battery 12 and the electronics frame 14 via the damping element 26 , the cage 28 and the damping body 30 .
  • a coherent assembly with a comparatively large mass is formed within the housing 4 .
  • the receiver 6, the battery 12 and the electronics frame 14 react much more robustly to vibrations, particularly in the higher frequency range, than if they were mounted individually on the housing 4. Due to the high overall weight of this assembly, the hearing instrument 2 also experiences effective vibration damping in the lower and middle frequency range. In particular, the vibration energy emitted by the earphone 6 is effectively dissipated by the elastic damping element 26 and the elastic damping body 30 .

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Battery Mounting, Suspending (AREA)
  • Telephone Set Structure (AREA)

Claims (7)

  1. Instrument auditif (2) avec un boîtier (4), avec un écouteur (6), avec au moins un autre composant (12, 14) logé dans le boîtier (4) et avec une unité de couplage (16) pour le logement à vibrations réduites de l'écouteur (6), dans lequel l'écouteur (6) est couplé par l'intermédiaire de l'unité de couplage (16) à l'au moins un autre composant (12, 14),
    caractérisé en ce
    que l'écouteur (6) est couplé élastiquement à l'au moins un autre composant (12, 14) par l'intermédiaire de l'unité de couplage (16), et que l'unité de couplage (16) comprend un corps d'amortissement (30) en caoutchouc ou en un matériau élastomère, qui est couplé d'une part à l'écouteur (6) et d'autre part à l'au moins un autre composant (12, 14), dans lequel l'au moins un autre composant, avec lequel l'écouteur (6) est couplé élastiquement par l'intermédiaire de l'unité de couplage (16), est une batterie (12) et/ou un cadre électronique (16) pour le maintien d'au moins un composant électronique (10), et dans lequel l'unité de couplage (16) comprend au moins un élément de fixation (42, 46) pour la fixation par adhérence d'au moins un autre composant (12, 14).
  2. Instrument auditif (2) selon la revendication 1,
    dans lequel le matériau du corps d'amortissement (30) a une dureté Shore (Shore A) de 50 à 70.
  3. Instrument auditif (2) selon la revendication 2,
    dans lequel l'unité de couplage (16) comprend, en plus du corps d'amortissement (30), un élément d'amortissement élastique (26) pour le montage de l'écouteur (6) et une cage (28) entourant celui-ci, dans lequel le corps d'amortissement (30) est fixé à la cage (28).
  4. Instrument auditif (2) selon la revendication 3,
    dans lequel aussi bien l'élément d'amortissement élastique (26) que le corps d'amortissement (30) ont une dureté inférieure à celle de la cage (28).
  5. Instrument auditif (2) selon la revendication 3 ou 4,
    dans lequel l'élément d'amortissement élastique (26) a une dureté inférieure à celle du corps d'amortissement (30).
  6. Instrument auditif (2) selon la revendication 2,
    dans lequel le ou chaque élément de fixation (42, 46) est formé d'une seule pièce avec le corps d'amortissement (30).
  7. Instrument auditif (2) selon l'une des revendications précédentes,
    dans lequel des contacts électriques (44) sont intégrés dans l'unité de couplage (16) pour établir un contact avec la batterie (12) et/ou un composant électronique (10).
EP19185642.6A 2018-08-24 2019-07-11 Instrument auditif doté d'une unité d'accouplement destiné à supporter un écouteur par amortissement de vibrations Active EP3614699B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018214323.4A DE102018214323A1 (de) 2018-08-24 2018-08-24 Hörinstrument mit einer Kopplungseinheit zur schwingungsgedämpften Lagerung eines Hörers

Publications (2)

Publication Number Publication Date
EP3614699A1 EP3614699A1 (fr) 2020-02-26
EP3614699B1 true EP3614699B1 (fr) 2022-08-31

Family

ID=67262086

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19185642.6A Active EP3614699B1 (fr) 2018-08-24 2019-07-11 Instrument auditif doté d'une unité d'accouplement destiné à supporter un écouteur par amortissement de vibrations

Country Status (5)

Country Link
US (1) US11019435B2 (fr)
EP (1) EP3614699B1 (fr)
CN (1) CN110858949B (fr)
DE (1) DE102018214323A1 (fr)
DK (1) DK3614699T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3972288A1 (fr) * 2020-09-17 2022-03-23 Sonova AG Dispositif auditif

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3048668A (en) * 1961-04-17 1962-08-07 Beltone Hearing Aid Company Transducer suspension system
US4588867A (en) * 1982-04-27 1986-05-13 Masao Konomi Ear microphone
DE8704315U1 (fr) * 1987-03-23 1987-05-27 Siemens Ag, 1000 Berlin Und 8000 Muenchen, De
WO2000069216A2 (fr) * 1999-05-05 2000-11-16 Sarnoff Corporation Appareil auditif modulaire jetable
WO2000079835A1 (fr) * 1999-06-16 2000-12-28 Phonak Ag Appareil auditif se plaçant derriere l'oreille
CN1891011A (zh) * 2003-12-05 2007-01-03 奥迪康有限公司 具有接收机机壳的通信装置
US9578429B2 (en) * 2006-11-09 2017-02-21 Sonova Ag Support mount for electronic components
DE102007037024A1 (de) 2007-08-06 2009-02-26 Siemens Medical Instruments Pte. Ltd. Hörereinrichtung mit elastisch gelagertem Hörer
US8379897B2 (en) 2008-09-17 2013-02-19 Daniel R. Schumaier Hearing assistance device having reduced mechanical feedback
KR20110051237A (ko) 2008-10-10 2011-05-17 비덱스 에이/에스 외이 수신기용 탄력성 쉘
DE102010009782B4 (de) * 2010-03-01 2014-02-27 Audifon Gmbh & Co. Kg Hörgerät
US9319817B2 (en) 2011-12-23 2016-04-19 Sonova Ag Tip-plate assembly, hearing device with a tip-plate assembly and method of manufacturing a hearing device with a tip-plate assembly
CN104023949A (zh) * 2012-01-17 2014-09-03 峰力公司 助听器部件的制造方法
DE102012221233A1 (de) * 2012-09-12 2014-03-13 Siemens Medical Instruments Pte. Ltd. Koppelbare Hörvorrichtung für ein Hörgerät
EP3179742B8 (fr) * 2015-09-30 2019-12-25 Oticon A/s Prothèse auditive comprenant un ensemble récepteur amortissant les chocs et les vibrations

Also Published As

Publication number Publication date
CN110858949B (zh) 2021-12-28
US20200068322A1 (en) 2020-02-27
DE102018214323A1 (de) 2020-02-27
EP3614699A1 (fr) 2020-02-26
DK3614699T3 (da) 2022-11-21
US11019435B2 (en) 2021-05-25
CN110858949A (zh) 2020-03-03

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