EP3491846A1 - Appareil d'aide auditive et dispositif d'aide auditive - Google Patents

Appareil d'aide auditive et dispositif d'aide auditive

Info

Publication number
EP3491846A1
EP3491846A1 EP17719511.2A EP17719511A EP3491846A1 EP 3491846 A1 EP3491846 A1 EP 3491846A1 EP 17719511 A EP17719511 A EP 17719511A EP 3491846 A1 EP3491846 A1 EP 3491846A1
Authority
EP
European Patent Office
Prior art keywords
hearing aid
housing
antenna element
antenna
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.)
Granted
Application number
EP17719511.2A
Other languages
German (de)
English (en)
Other versions
EP3491846B1 (fr
Inventor
Hans Adel
Birgit KÜFNER-SCHWERDTNER
Jürgen Reithinger
Benjamin Schmidt
Erwin Singer
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
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 Sivantos Pte Ltd filed Critical Sivantos Pte Ltd
Publication of EP3491846A1 publication Critical patent/EP3491846A1/fr
Application granted granted Critical
Publication of EP3491846B1 publication Critical patent/EP3491846B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • H04R25/55—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired
    • H04R25/554—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired using a wireless connection, e.g. between microphone and amplifier or using Tcoils
    • 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
    • H04R25/602—Mounting or interconnection of hearing aid parts, e.g. inside tips, housings or to ossicles of batteries
    • 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
    • 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
    • H04R2225/51—Aspects of antennas or their circuitry in or for hearing aids
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
    • H04R2460/17—Hearing device specific tools used for storing or handling hearing devices or parts thereof, e.g. placement in the ear, replacement of cerumen barriers, repair, cleaning hearing devices

Definitions

  • the invention relates to a hearing aid device, in particular an in-the-ear hearing device, having a housing with an electromagnetic wave transmitting and / or receiving unit arranged therein, which is coupled to an antenna element.
  • the invention further relates to a particular binaural hearing aid device with two such hearing aids.
  • Hearing aids are portable hearing aids that are used to care for the hearing impaired or the hearing impaired.
  • different types of hearing aids such as behind-the-ear hearing aids (BTE) and hearing aids with an external receiver (RIC: receiver in the canal) and in-the-ear hearing aids (IDO), for
  • BTE behind-the-ear hearing aids
  • RIC receiver in the canal
  • IDO in-the-ear hearing aids
  • ITE In-The-Ear
  • CIC Completely-In-Channel
  • NC Invisible-In-The-Channel
  • the hearing aids listed by way of example are worn on the outer ear or in the auditory canal of a hearing aid user.
  • bone conduction hearing aids, implantable or vibrotactile hearing aids are also available on the market. The stimulation of the damaged hearing takes place either mechanically or electrically.
  • Such hearing aids or hearing aids basically have as essential (hearing aid) components an input transducer, an amplifier and an output transducer.
  • the input transducer is typically an acousto-electric transducer, such as a microphone, and / or an electromagnetic receiver, for example an induction coil or a (radio-frequency, RF) antenna.
  • the output transducer is usually used as an electro-acoustic transducer, for example as a miniature speaker (listener), or as an electromechanical transducer.
  • shear transducer such as a bone conduction, implemented.
  • the amplifier is usually integrated in a signal processing device.
  • the power is usually supplied by a battery or a rechargeable battery.
  • Such hearing aids furthermore have, for example, an antenna element as an RF antenna, by means of which the hearing aid can be coupled, for example, with a control element (remote control) and / or with another hearing aid.
  • the same antenna element is used for sending and receiving data for reasons of space.
  • a so-called binaural hearing aid device two such hearing aids or hearing aid devices are supported by a user, wherein a wireless signal connection exists between the antenna elements of the hearing aids during operation.
  • data possibly even large amounts of data, are exchanged or transmitted wirelessly between the hearing device on the right and left ear during operation.
  • the exchanged data and information allow a particularly effective adaptation of the hearing aids to a respective acoustic situation. In particular, this allows a particularly authentic surround sound for the user as well as improves the Wiver Prediction, even in noisy environments.
  • Hearing aids are preferably designed to be particularly space-saving and compact, so that they can be visually worn as inconspicuously by a hearing device user.
  • increasingly smaller hearing aids are manufactured, which have an increasingly higher wearing comfort, and are thus hardly noticed by a user when worn on or in an ear. Due to the resulting reduced space, however, it is increasingly difficult to accommodate and / or install conventional antenna elements for wireless signal transmission in such hearing aids.
  • ITE hearing aids which are usually custom-made and deep in an ear canal or ear canal of the hearing aid. sit in the user's seat.
  • Such hearing aids are preferably constructed in such a space-compact that they are arranged in the wearing state substantially optically invisible in the ear canal.
  • grip elements in the form of Ausziehfäden or ironing are conceivable, which are fixedly coupled to the housing of the hearing aid and easily accessible by a hearing aid user.
  • grip elements are usually arranged on a housing surface in the wearing state on the outside, such as a faceplate of the housing, so that they are easily accessible by a hearing aid user when needed.
  • the extraction threads and straps are usually used only for the purpose of simplified withdrawal of the ITE hearing aid from the ear.
  • the invention has for its object to provide a particularly suitable hearing aid.
  • the invention is further based on the object of specifying a hearing aid device equipped with two such hearing aid devices.
  • the hearing aid device according to the invention is particularly suitable as an in-ear hearing aid (ITE hearing aid), for example as a channel hearing aid (ITE: In-The-Ear, CIC: Completely-In-Channel, NC: Invisible-In-The-Ear). Channel).
  • ITE hearing aid In-The-Ear
  • CIC Completely-In-Channel
  • NC Invisible-In-The-Ear
  • the hearing aid device which is also referred to below as a hearing device, has a shell-like housing for accommodating electrical and electronic hearing device components.
  • the hearing device components in this case comprise a transmitting and / or receiving unit for electromagnetic waves. Under electromagnetic waves are below particular radio signals, also referred to as RF signals to understand.
  • the transmitting and / or receiving unit is assigned an antenna element for sending and / or receiving the RF signals, this means that the Transmitting and / or receiving unit is at least signal technology coupled to the antenna element.
  • a grip element On a housing surface of the housing facing outwards in a carrying state, for example on a faceplate (cover, upper shell) which closes the housing like a cover, a grip element (grip part) is arranged, which is easily graspable by a hearing aid user in the worn state.
  • the handle element is suitably mechanically fixedly coupled to the housing and / or the housing surface. With the handle element, the hearing aid is thus easily pulled out or removed in the wearing state.
  • the antenna element is at least partially integrated in the grip element. Due to the functional integration of the antenna element and the grip element, a particularly suitable hearing aid device is realized. Furthermore, due to the at least partial arrangement of the antenna element outside the housing, its performance and effectiveness are improved.
  • the grip element thus not only serves to pull or remove the hearing aid from an ear canal or ear canal, but has through the integrated antenna element on a further function with respect to the operation of the hearing aid on.
  • the antenna element is arranged at least partially outside the housing, as a result of which installation space within the housing is saved.
  • the hearing aid construction it is possible to make the hearing aid construction more compact, which on the one hand increases the wearing comfort of the hearing aid.
  • the hearing aid is thus particularly visually inconspicuous within an ear canal (ear canal) used.
  • the housing of the hearing aid is preferably adapted individually to the ear canal or the auditory canal of the (hearing aid device) user.
  • the housing is custom-made for the particular user. Since the antenna element is at least partially disposed outside of the housing, constructive restrictions of the antenna element in comparison to a complete arrangement of the antenna element within the housing avoided. As a result, this advantageously transfers to additional freedom in the design and implementation of the antenna element, so that a comparatively large number of antenna structures is made possible for the hearing aid device. Furthermore, thus greater freedom in terms of dimensioning the antenna length allows.
  • the hearing aid includes, for example, an input transducer and an amplifier as a signal processing device as well as an output transducer as hearing aid components.
  • the transmitting and / or receiving unit is functionally suitable and set up for generating and / or evaluating RF signals which can be transmitted or received by means of the antenna element.
  • the transmitting and / or receiving unit has, for example, electronic components for adaptation to the antenna element, for example for power adaptation or resistance adaptation.
  • the transmitting and / or receiving unit and the antenna element together are preferably designed as a transceiver, that is to say as a transceiver or a transceiver unit of the hearing aid, for the wireless transmission and reception of (radio) signals and data.
  • the transmission range of the transceiver unit is for example 10 m.
  • a range here is to be understood in particular the signal range, ie a distance of the respective communication or signal connection, which may be maximum between a transmitter and a receiver, so that even a communication between them is possible.
  • the antenna element is preferably designed as a radio-frequency antenna (RF antenna) or as an RF resonator, for example for 2.4 GHz Bluetooth transmission using an ISM frequency band (ISM: Industrial, Scientific and Medical).
  • the antenna element is thus suitable and configured to receive or receive and transmit or transmit electromagnetic radio waves.
  • the hearing aid is preferably substantially complete, but at least partially, disposed in an ear canal or ear canal of the user.
  • the antenna element and / or the transmitting and / or receiving unit are preferably suitable and set up for the purpose of correcting attenuation and / or detuning of the RF signals on the basis of the user's head.
  • the grip element is designed, for example, ironing or loop-like.
  • the grip element is designed as a, for example, elongate pull-out thread (pull wire, pull-off string), which projects upwards approximately perpendicularly to the housing surface or faceplate. Due to the approximately vertical orientation of the antenna element, a particularly suitable alignment and positioning is realized in the wearing state, whereby radiation losses due to attenuations and / or detuning of the RF signals by the user's head are advantageously reduced. This transmits itself in the sequence particularly advantageous to the signal quality of a wireless signal connection in a binaural version of the hearing aids.
  • the antenna element is embodied as a wire integrated in the grip element, in particular in the pull-out thread.
  • the wire in this case extends in particular along a longitudinal direction of the grip element. This allows a particularly inexpensive hearing aid.
  • the antenna element can be embodied, for example, as a monopole antenna, with the length of the antenna element being correspondingly adaptable to the wavelength of the RF signals to be transmitted and / or to be received.
  • the grip element is at least partially made of an electrically non-conductive material.
  • the antenna element does not extend over the entire length of the Ausziehfadens. This is advantageous in particular in one embodiment of the antenna element as a monopole antenna, since the typically required length of the output ziehfadens is greater than the desired antenna length for receiving the RF signals.
  • the antenna element is designed as a dipole antenna with a first dipole arm integrated into the grip element and with a second dipole arm arranged in the housing.
  • the second dipole arm is integrated in the housing surface or faceplate of the housing.
  • the first and second dipole arm of the antenna element are arranged in a suitable embodiment substantially perpendicular to each other. This is especially true when integrating the second dipole arm in the
  • the antenna element is designed as an F-shaped antenna with a transmission and / or reception area integrated into the grip element as a vertical F-leg, to which two housing-internal contact arms are coupled as horizontal F-legs.
  • the antenna element is in this case designed in particular as an inverted F antenna.
  • a particularly advantageous antenna structure for the antenna element integrated in the grip element is realized. It is also conceivable, for example, a h-shaped design (h-antenna).
  • An additional or further aspect of the invention provides that the antenna element, in particular by means of at least one contact arm, to a
  • the housing internal battery is coupled.
  • the battery is accommodated, for example, in a battery compartment of the housing.
  • the battery is substantially included in the antenna element.
  • the battery suitably forms a counterweight (counterpole) or a mass to an antenna element designed, for example, as a monopole or F antenna.
  • a particularly expedient and installation space-compatible counterweight of the antenna element is made possible.
  • the antenna element in particular by means of at least one contact arm, to a metallized
  • Housing surface of the housing is coupled.
  • the housing surface is in this case in particular a housing inner wall of the housing, which is at least partially or partially metallized, and thus as a housing-internal ground plane (ground plane) for contacting the antenna element is used.
  • This metallization thus increases an available ground surface of the housing-internal ground potential, and thus the counterweight of the antenna element.
  • two hearing aid devices according to the invention are used for a particularly binaural hearing aid device.
  • the hearing aids are in operation here by means of their antenna elements in a wireless signal connection.
  • a signal or communication connection for wireless signal transmission is established between the hearing aids.
  • the respective antenna elements act both as transmitting and as receiving antennas.
  • FIG. 1 shows a binaural hearing aid device with two hearing aids in a wearing state
  • FIG. 3 shows a section of the hearing aid with a monopole antenna antenna element
  • FIG. 4 shows a section of the hearing aid device in a second embodiment with an antenna element designed as an inverted F antenna
  • Fig. 5 shows a section of the hearing aid in a third embodiment with a dipole antenna as an antenna element. Corresponding parts and sizes are always provided with the same reference numerals in all figures.
  • FIG. 1 schematically shows a binaural hearing aid device 2 in a wearing state on a head 4 of a user.
  • the hearing aid device 2 comprises two hearing aids 6, which in the wearing state are each substantially completely seated within an ear canal or ear canal, not shown in detail, of a left or right ear 8.
  • the hearing aids 6 each have an antenna element 10, by means of which the hearing aids 6 are bidirectionally coupled in operation by means of a wireless radio or signal connection 12.
  • the hearing aid device 6, shown individually in FIG. 2, has an elongated gripping element 14 in the form of an extraction thread for easier removal or withdrawal from the ear canal.
  • the grip element 14 is in this case mechanically fixedly coupled to a housing 16 of the hearing aid 6.
  • the grip element 14 is arranged on a housing surface 18, which is on the outside in the wearing state, in particular, a faceplate of the housing 16.
  • the antenna element 10 is at least partially integrated into the grip element 14 or formed integrally therewith.
  • the grip element and the antenna element 10 are designed as a common component.
  • the antenna element 10 extends at least partially outside the housing 16, and this is approximately vertically upwards in the area of the faceplate 18.
  • the hearing aid device 6 shown schematically in section in FIG. 3 is designed as an ITE hearing aid.
  • the hearing aid device 6 comprises a housing shell 20 which is individually adapted to an auditory canal of a hearing device user and which is closed by means of the cover-like faceplate 18.
  • hearing aid components in the form of a microphone 22, a signal processing unit 24, a receiver 26 and a transmitter and receiver unit 28 for electromagnetic radiation are provided in the housing 16 of the hearing aid 6 formed by the housing shell 20 and the faceplate 18.
  • hearing aid components in the form of a microphone 22, a signal processing unit 24, a receiver 26 and a transmitter and receiver unit 28 for electromagnetic radiation are provided. arranged tables waves.
  • the hearing aid components are powered by a battery 30 with electrical energy.
  • the battery 30 is suitably inserted in a battery compartment 32 (FIG. 4) of the housing 16 in the assembled state.
  • the battery compartment 32 is closed by a cover-side flap 34 (FIG. 2).
  • the antenna element 10 is designed as a wire integrated into the grip element 14 or as an integrated line.
  • the wire extends in particular along a longitudinal direction of the grip element 14. This makes a particularly cost-effective hearing aid device possible.
  • the antenna element 10 is designed as a monopole antenna whose antenna end on the supply side is guided to the transmitting and receiving unit 28. The opposite free end of the antenna element 10 is guided and integrated in the grip element 14.
  • the antenna element 10 is signal-coupled with the transmitting and receiving unit 28 as a transceiver of the hearing aid 6 and, for example, suitable for wireless 2.4 GHz Bluetooth signal transmission in an ISM frequency band and set up.
  • the grip element 14 is made at least in sections from an electrically nonconductive material. In other words, the antenna element 10 does not extend over the entire length of the grip element 14.
  • the antenna element 10 is designed as an inverted F antenna.
  • the hearing aid components 22, 24, 26 and 28 are not shown in detail in FIG. 4.
  • the antenna element 10 has a vertical F-leg 36 formed as a transmitting and receiving region, which is integrated into the grip element 14.
  • the transmitting and receiving region 36 in particular forms the gripping element 14 itself.
  • the transmitting and receiving region 36 in this exemplary embodiment is in particular monolithic, that is, in one piece or in one piece, with each other.
  • the transmission and reception area 36 essentially forms the
  • the transmitting and receiving portion 36 is guided on two housing-internal contact arms as horizontal F-legs 38 a, 38 b.
  • the contact arm 38a is connected as a feed line to the not shown in Fig. 4 transmitting and receiving unit 28, wherein the second contact arm 38b is guided as a short-circuit connection to a ground potential.
  • the contact arm 38b is in particular coupled to the battery 30 inside the housing. Due to the coupling, the battery 30 is substantially included in the antenna element 10. In this case, the battery 30 forms a counterweight (opposite pole) or a ground to the antenna element 10 designed as an F antenna.
  • the antenna element 10 or its contact arm 38b may be coupled to a metallized housing surface 40 of the housing 16.
  • Housing surface 40 here is in particular a housing inner wall of the housing, which is at least partially or partially metallized, and thus as a housing-internal ground plane (ground plane) for contacting the antenna element 10 is available.
  • the antenna element 10 is designed as a dipole antenna with a first dipole arm 42 integrated into the grip element 14 and with a second dipole arm 44 arranged in the housing 16.
  • the dipole arm 44 is in this case integrated in particular in the material of the faceplate 18.
  • the dipole arms 42 and 44 of the antenna element 10 are arranged substantially perpendicular to each other.

Abstract

L'invention concerne un appareil d'aide auditive (6) comprenant un boîtier (16) qui renferme une unité d'émission et/ou de réception (28) pour ondes électromagnétiques, laquelle est couplée à un élément d'antenne (10), un élément de préhension (14) étant disposé sur une surface (18) du boîtier (16) tournée vers l'extérieur en mode d'utilisation, l'élément d'antenne (10) étant intégré au moins par endroits dans l'élément de préhension (14).
EP17719511.2A 2016-08-01 2017-04-07 Prothese auditive et dispositif de prothese auditive Active EP3491846B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP16182230 2016-08-01
PCT/EP2017/058440 WO2018024377A1 (fr) 2016-08-01 2017-04-07 Appareil d'aide auditive et dispositif d'aide auditive

Publications (2)

Publication Number Publication Date
EP3491846A1 true EP3491846A1 (fr) 2019-06-05
EP3491846B1 EP3491846B1 (fr) 2020-06-10

Family

ID=56615850

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17719511.2A Active EP3491846B1 (fr) 2016-08-01 2017-04-07 Prothese auditive et dispositif de prothese auditive

Country Status (5)

Country Link
US (1) US10735873B2 (fr)
EP (1) EP3491846B1 (fr)
CN (1) CN109845295B (fr)
DK (1) DK3491846T3 (fr)
WO (1) WO2018024377A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10757515B2 (en) 2018-02-21 2020-08-25 Oticon A/S Hearing aid device having an antenna
EP3629600A1 (fr) * 2018-09-28 2020-04-01 GN Hearing A/S Dispositif auditif comportant une antenne s'étendant du dispositif auditif
EP3629599B1 (fr) * 2018-09-28 2021-11-10 GN Hearing A/S Prothèse auditive comprenant une antenne en boucle
DE102020201480A1 (de) * 2020-02-06 2021-08-12 Sivantos Pte. Ltd. Hörgerät
EP3909499A1 (fr) * 2020-05-15 2021-11-17 Innovius B.V. Système de surveillance et d'assistance vestimentaire
DE102020209124A1 (de) 2020-07-21 2022-01-27 Sivantos Pte. Ltd. ITE-Hörgerät
CN112448131B (zh) * 2020-11-12 2022-12-13 厦门亿联网络技术股份有限公司 天线结构和无线基站
DE102021201909A1 (de) * 2021-03-01 2022-09-01 Sivantos Pte. Ltd. Hörgerät, Antenne für ein Hörgerät und Verfahren zur Herstellung eines Hörgeräts
CN116888978A (zh) * 2021-10-14 2023-10-13 恩尼奥·潘内拉 用于运动场地的音频传输装置

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Publication number Priority date Publication date Assignee Title
US5721783A (en) * 1995-06-07 1998-02-24 Anderson; James C. Hearing aid with wireless remote processor
US7256747B2 (en) * 2004-01-30 2007-08-14 Starkey Laboratories, Inc. Method and apparatus for a wireless hearing aid antenna
US20100020994A1 (en) * 2004-10-28 2010-01-28 Christensen Craig L Antenna integrated with retrieval component of hearing aid
US20140023216A1 (en) * 2012-07-17 2014-01-23 Starkey Laboratories, Inc. Hearing assistance device with wireless communication for on- and off- body accessories
US9485592B2 (en) * 2012-12-04 2016-11-01 Sonova Ag Hearing instrument comprising two antennas
US9237404B2 (en) * 2012-12-28 2016-01-12 Gn Resound A/S Dipole antenna for a hearing aid
EP3110174B1 (fr) * 2015-06-24 2021-02-17 Oticon A/s Dispositif auditif comprenant une unité d'antenne et ligne de transmission blindée

Also Published As

Publication number Publication date
CN109845295A (zh) 2019-06-04
US20190166437A1 (en) 2019-05-30
EP3491846B1 (fr) 2020-06-10
WO2018024377A1 (fr) 2018-02-08
CN109845295B (zh) 2021-07-06
DK3491846T3 (da) 2020-09-14
US10735873B2 (en) 2020-08-04

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