WO2021239421A1 - Élément de manchon de blindage - Google Patents

Élément de manchon de blindage Download PDF

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Publication number
WO2021239421A1
WO2021239421A1 PCT/EP2021/061892 EP2021061892W WO2021239421A1 WO 2021239421 A1 WO2021239421 A1 WO 2021239421A1 EP 2021061892 W EP2021061892 W EP 2021061892W WO 2021239421 A1 WO2021239421 A1 WO 2021239421A1
Authority
WO
WIPO (PCT)
Prior art keywords
shield sleeve
shielding
shield
sleeve
built
Prior art date
Application number
PCT/EP2021/061892
Other languages
German (de)
English (en)
Inventor
Pascal Wölffle
Original Assignee
Amphenol Tuchel Industrial GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Amphenol Tuchel Industrial GmbH filed Critical Amphenol Tuchel Industrial GmbH
Priority to EP21723872.4A priority Critical patent/EP4158733A1/fr
Publication of WO2021239421A1 publication Critical patent/WO2021239421A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
    • H01R9/05—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for coaxial cables
    • H01R9/0524—Connection to outer conductor by action of a clamping member, e.g. screw fastening means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
    • H01R13/6581—Shield structure
    • H01R13/6582—Shield structure with resilient means for engaging mating connector
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
    • H01R13/6591—Specific features or arrangements of connection of shield to conductive members
    • H01R13/6592—Specific features or arrangements of connection of shield to conductive members the conductive member being a shielded cable
    • H01R13/6593—Specific features or arrangements of connection of shield to conductive members the conductive member being a shielded cable the shield being composed of different pieces

Definitions

  • the invention relates to a shield sleeve element for a built shield sleeve for transferring the shielding of cable shields to shielding partners within a plug-in connection, having a shaft and a contacting area.
  • the invention also relates to a built-up shield sleeve, consisting of at least two shield sleeve elements and a connector module, as well as a modular connector based thereon with such a shield sleeve.
  • plug-in connections For contacting or making detachable electrically conductive connections, plug-in connections, contacting elements, pole connectors, receptacles, etc. are used in a wide variety of designs and variants. In particular, but not exclusively for electrical contacting tasks in the higher power range, contact systems have been developed that are based on prismatic or round geometries to accommodate one or more contact pins.
  • High-voltage connectors are often implemented with one or more plug-in contact pins and, in addition to reliable, detachable and permanent contact, must meet other requirements depending on the area of application.
  • connectors that can be flexibly adapted to the contacting task are required, multi-part connecting elements are often used.
  • One possibility of contacting consists in the use of modularly constructed square or rectangular plug connectors with a plurality of contacting elements which can be arranged in one or more modules within the plug connector.
  • Such connectors can be adapted very flexibly to different contacting tasks, power ranges, IP protection classes, etc. due to the modular structure due to the use of different modules.
  • one or a plurality of modules can be accommodated within module slots in the connector.
  • the modules are constructed in such a way that at least one plug contact pin is integrated. Modules with a large number of plug contact pins are also implemented.
  • a criterion that must practically always be met is electromagnetic compatibility (EMC).
  • Electromagnetic compatibility means the (largely) lack of effects on other devices and facilities that lead to unwanted or intentional malfunctions in electrical or electronic equipment due to e.g. B. electrical, magnetic or electromagnetic fields and processes. This already includes influences from currents or voltages.
  • the European EMC Directive defines electromagnetic compatibility as follows: “the ability of an apparatus, a plant or a system to work satisfactorily in the electromagnetic environment without itself causing electromagnetic interference, which is common to all apparatus, plants or systems in this environment Systems would be unacceptable "(Source: EU Directive 2014/30 / EU Article 3 No. 4 of 02.26.2014).
  • Electromagnetically relevant interference emissions can also come from connectors,
  • Plug connections, contacts and lines run out, as these are live.
  • devices, devices, lines and connectors are often shielded.
  • the shielding of electrotechnical devices, facilities and rooms is used to keep electrical and / or magnetic fields away from them or, conversely, to protect the environment from the fields emanating from the facility.
  • the shielding devices of cables In the area of plug-in connectors, plug-in contacts and contacts, the shielding devices of cables must be continued without gaps and interruptions in order to ensure that electromagnetic emissions are reduced or prevented.
  • a coupling impedance between the inner, current-carrying conductor (core, stranded wire) and the outer cable shield (outer conductor, cable shield) is implemented based on the mode of operation of the Faraday cage.
  • the connectors must be adequately shielded to improve electromagnetic compatibility.
  • electrical connectors are usually encapsulated with an electrically conductive sheath or a metallic braid is inserted
  • sleeves, spring sleeves, shielding sleeves, shielding springs can be used to connect the shielding devices of the lines with the shielding measures of the connector housing and / or the contacting mating connector and / or the line to be contacted.
  • shielded plug connections, plugs, cables, contacts, etc. are mass-produced items in extremely high quantities, the cost-effectiveness of which depends on a cost-minimized structure and easy, simple assembly.
  • the shields within the plug-in connectors and at the ends of the cables to be contacted are designed as shielding sleeves.
  • DE 102012 110233 A1 shows a shielding sleeve designed as a shielding part with a spring washer in a connection device for the transmission of high-voltage current in the motor vehicle sector with at least one first connection element, at least one second connection element, at least one shielding housing part and fixing means, the first connection element having at least one first housing arrangement with a first insulating housing part with at least one first contact element which is electrically connected to an inner conductor of a cable and a shielding arrangement which is connected to a shielding of the cable, the shielding arrangement being connected to the shielding housing part via a shield and wherein the second connection element is at least a second housing arrangement with a second insulating housing part with at least one second contact element which is electrically connected to a current conducting element.
  • the shielding part is designed as a shielding sleeve with a spring ring. In this way, the first connecting
  • the shielding solution for round plug connections presented in DE 11 2012 002 827 B4 is also sleeve-shaped, with a shielding consisting of braided shielding of the cable and a shielding sleeve arranged within a grip body, the shielding sleeve ending at the plug-side end of the grip body.
  • the shielding sleeve interacts with a movable contacting element so that there is a position-dependent shielding electrical connection.
  • the teaching of DE 20 2012 000421 U1 attempts to solve a further disadvantage, the shielding connection between shielding elements in plug-in connectors and cable shields, which is not always reliable and / or which can be implemented in a simple manner.
  • the improvement between the shield connection between the cable and the connector is to be achieved by a shielded connector with a housing, the housing being designed as a housing angled at an angle a and the housing having a sleeve-shaped shielding element in its interior for connection to a shielded cable and the sleeve-shaped shield element can be directly connected to a braided shield folded back around a cable by means of a clamping ring having the housing and a shield transfer element is also arranged in the housing for direct connection to the braided shield of the shield.
  • a separation of the current paths is taken into account, so that a distinction is made between load and fault current on the one hand and the shielding on the other hand in that an optimized shielding takes place through a flat shielding geometry and a separate current path
  • a shield socket for a plug connection between a shield of a high-voltage line and a grounded housing the shield socket being made of a metal material and essentially hollow-cylindrical, with an axial plug-in contour for inserting a shield plug of the high-voltage line connected to the shield on at least a portion of an inside of the Shield socket is arranged;
  • a self-tapping spiral structure for cutting into a wall surface of an unmachined opening of the housing is arranged on at least a partial area of an outside of the shield socket; and a drive geometry for transmitting a torque from a setting tool is arranged at an end region of the shield socket.
  • the assembly takes place in that the shield socket is screwed into an unmachined hole in a wall of the housing by rotation about a longitudinal axis of the shield socket.
  • the spiral structure is raised above an outer surface of the shield socket.
  • the spiral structure can be sharp-edged and cut or dig into a side surface of the hole when it is screwed in.
  • the spiral structure can have cutting edges to cut chips from the side surface. By cutting, digging or furrowing, any oxide layer that may be present on the side surface is at least partially broken through and an electrically conductive contact is established between the shield socket and the housing.
  • the spiral structure can be deformed when screwing in. For example, an elastic deformation of the spiral structure can generate a pressing force between the shield socket and the housing. While the functionality of this solution is at least recognizable, both the production of the sleeve-shaped shield socket with its considerably discontinuous contours and the tool-dependent assembly are very complex and therefore only suitable for large-scale production to a limited extent.
  • DE 102012 105258 A1 proposes a shielding sleeve that comprises a rotationally symmetrical sleeve body, at one end of which there is at least one radially protruding contact tab that can be elastically deflected in the radial direction, the contact tab being one opposite the sleeve body in the radial direction Has protruding contact point.
  • the combination of a shield sleeve and a crimp sleeve designed to be slidable over the shield sleeve is also proposed.
  • the radially protruding contact tab which is elastically deflectable in the radial direction and has at least one contact point protruding in the radial direction relative to the sleeve body, makes contact between the shielding sleeve and the metallic housing part of the connection element no longer in the axial direction but in the radial direction.
  • the contact force and thus the contact resistance between the shielding sleeve and the metallic housing part of the connection element are therefore less dependent on the force between the housing parts of the connection element in the axial direction.
  • the invention recognizes that the general structure of shielding elements in plug-in connections due to their sleeve shape, socket shape, tube-like geometry fulfills the shielding functionality, especially with round plug-in connectors or round contact elements, but production is complex and assembly is difficult.
  • the teaching according to the invention proposes a built shield sleeve with a sleeve-shaped design.
  • built is to be understood as a shield sleeve which consists of at least two shield sleeve elements.
  • the at least two shield sleeve elements have at least one dividing line to one another, which extends at least approximately and in some areas in the longitudinal direction, axial direction of the shield sleeve.
  • there are two or more shell-shaped shielding sleeve elements which, in their assembled or assembled state, form the tubular shielding sleeve, shielding sleeve.
  • coupling means in the form of at least one tab are provided, which are inserted into corresponding recesses and bent over or folded over on the outside.
  • shield sleeve elements By coupling the at least two shield sleeve elements to form a shield sleeve unit, it is possible to implement shields in a particularly easy-to-use manner, even with modular square or rectangular connectors with a plurality of contacting elements that can be arranged in one or more modules within the connector.
  • shell-shaped shielding sleeve elements can be implemented, for example, using production methods suitable for large-scale production, such as punching and bending processes or massive forming.
  • the elements can be half-shell-shaped.
  • the invention optionally provides that the half-shell shield sleeve elements are made up of identical parts. Due to the fact that the parts are identical, that is to say the practically identical geometrical structure, the economic viability of the plug-in contacting solution with shielding is again supported in a cost-effective manner. In this case, only a single manufacturing device, for example a punching and bending tool, is required. Storage, handling and transport costs are also reduced to this one part.
  • the electrically conductive connection ie the contacting of the shielding components, the so-called “shield transfer” of the braided shield of a line, cable, a shield partner is achieved.
  • the assembled shield sleeve can be formed, for example, from shield sleeve elements made of a zinc die-cast material.
  • the shielding sleeve elements of the constructed shielding sleeve with at least one resilient contact geometry, for example in the form of at least one spring tongue, in the direction of contacting the connector partner.
  • the assembled shield sleeve is assembled after the contacts have been assembled and the insulating body has been assembled.
  • the constructed shielding sleeve is implemented as a component that creates a stable sleeve that can then be crimped in a separate process step.
  • the shield sleeve elements are designed so that both 8-pin cables, for example for X-coded M12 connections, and 4-pin cables, for example for D-coded M12 connections, can be connected and crimped.
  • FIG. 1 shows a perspective view of two shield sleeve elements in FIG
  • FIG. 2 shows a perspective view of two shield sleeve elements in FIG
  • FIG. 3 shows the side view of two shield sleeve elements before they are assembled to form a built shield sleeve in the assembly arrangement with plug connector and cable;
  • 4 shows a perspective view of two shield sleeve elements assembled to form an assembled shield sleeve
  • 5 shows a perspective view of two shielding sleeve elements assembled to form a built-up shielding sleeve with plug connector and cable;
  • FIG. 6 shows the side view of two screen sleeve elements mounted to form a built one
  • FIG. 7 shows a perspective view of two shield sleeve elements of a second
  • Embodiment mounted to a built shield sleeve.
  • Figure 1 includes a perspective view of two screen sleeve elements 10 in an exploded view prior to assembly to form a built screen sleeve 1.
  • the built screen sleeve 1 is made from two half-shell-shaped screen sleeve elements 10 with a shaft 20, the screen sleeve elements 10 being integral parts. Because of the identical half-shell shape, only one geometrically and structurally identical type of shielding sleeve element 10 is required for the assembled shielding sleeve 1. With regard to storage, transport costs, handling and assembly steps, a particularly economical, simplifying and practical construction is achieved in this way.
  • the half-shell-shaped shielding sleeve element 10 is essentially formed by a shaft 20 and a contacting area 30 with a transition area 40.
  • Shank 20 and contacting area 30 of this exemplary embodiment have different diameters, so that the transition area 40 has the shape of part of a conical surface.
  • the likewise possible design of largely the same diameter for the cylindrical partial lateral surfaces of the shaft 20 and the contacting area 30 can either also make the transition area 40 into a cylindrical partial lateral surface or make it obsolete.
  • the contacting area 30 can have at least one spring tongue 32 at the end.
  • the at least one spring tongue 32 serves to make the contact, d, h. to make the implementation of an electrically conductive connection reliable and / or to reduce the contact resistance that frequently occurs at the transition contact surfaces.
  • the at least one spring tongue 32 can be supplemented by at least one contact point 32 ', which forms a reduced contact surface with the contact pariner and - assuming the same pressing force of the spring tongue 32 - causes a higher surface pressure at the contacting point.
  • the shield sleeve element 10 is equipped with at least one coupling means, so that the at least two shield sleeve elements 10 can be combined to form a built shield sleeve 1. In the exemplary embodiment in FIG.
  • a tab 23 in the area at the end of the shaft 20 and a tab 33 in the contacting area 30 are implemented as connecting elements. Both tabs can be rounded and / or tapered at the end.
  • the tab 23 at the end of the shaft 20 is bent on the outside around the shaft surface of the other shield sleeve element 10 in the collapsed position of the shield sleeve elements 10.
  • a notch 21 can be provided to improve the bending over and to promote a uniform bending line.
  • the tab 33 in the contacting area 30 acts as a connecting element together with a corresponding recess 31 such that the tab 33 is threaded into the recess 31 from the inside of the other shielding sleeve element 10 and the tab tip is then bent over.
  • Figure 2 shows a perspective view of two shield sleeve elements 10 in an exploded view prior to assembly to form a built shield sleeve 1 in the assembly arrangement with connector plug 100 and line, cable 110.
  • the outer insulation 111 of the cable 110 is removed in the area in which the shaft 20 of the Shield sleeve elements 10 will rest against the cable shielding 112 arranged under the outer insulation 111 after assembly.
  • FIG. 3 illustrates the side view of two shield sleeve elements 10 before they are assembled into a built shield sleeve 1 in the assembly arrangement with connector plug 100 and line 110 whose contact point 32 'has, so that both a defined contacting position of the shielding sleeve element 10 is ensured and the reliable establishment of contact is supported by surface contact.
  • FIG. 4 shows a perspective view of two shield sleeve elements 10 assembled to form a built shield sleeve 1 as a component without connector plug 100 and line, cable 110.
  • the tabs 33 in the contacting area 30 and the tabs 23 at the end of the shaft 20 are in their position, bent state for coupling, Fixing the shield sleeve elements 10 to one another.
  • Figure 5 shows a perspective view of two shield sleeve elements 10, put together to form a built shield sleeve 1 and mounted with the connector plug 100 and the line 110.
  • the shafts 20 rest on the cable shields 112 in the stripped areas of the cable 110 and make contact with the Cable shields 112.
  • the contact areas 30 lie on the connector plug 100 and / or the shielding ring, shielding collar 102.
  • Figure 6 illustrates the situation from Figure 5 within a side view of two shield sleeve elements 10, mounted to a built shield sleeve 1 with connector plug 100 and cable 110.
  • the axially parallel dividing plane of the shield sleeve elements 10 in this exemplary embodiment due to their half-shell shape and on the other hand, is illustrated
  • the outer diameter of the contacting area 30 of the constructed shielding sleeve 1, which is slightly larger than the diameter of the plug connector 100, is in the order of about 1/2 to 1 of the material thickness, the wall thickness of the spring tongue 32.
  • Figure 7 illustrates in a perspective view two shield sleeve elements 10 of a second embodiment, assembled to a built shield sleeve 1.
  • This embodiment of the shield sleeve elements 10 has a segmented shaft 20, so that the further improvement of the electrically conductive connection, the so-called shield transfer from the cable shield 112 to the Shield sleeve elements 10 or the assembled shield sleeve 1 is achieved.

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  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

L'invention se rapporte à un élément de manchon de blindage destiné à un manchon de blindage assemblé pour le transfert de blindage depuis des blindages de câble vers des partenaires de blindage à l'intérieur d'une connexion enfichable, l'élément de manchon de blindage comprenant un arbre et une région de contact, l'élément de manchon de blindage étant en forme de coque et étant muni d'un moyen de couplage de telle sorte qu'au moins deux éléments de manchon de blindage puissent être fixés l'un à l'autre. L'invention se rapporte également à un manchon de blindage assemblé constitué d'au moins deux éléments de manchon de blindage, à un module connecteur électrique, et à un connecteur électrique modulaire fondé sur ledit module connecteur électrique et muni d'un manchon de blindage de ce type.
PCT/EP2021/061892 2020-05-26 2021-05-05 Élément de manchon de blindage WO2021239421A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21723872.4A EP4158733A1 (fr) 2020-05-26 2021-05-05 Élément de manchon de blindage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020114088.6 2020-05-26
DE102020114088.6A DE102020114088B4 (de) 2020-05-26 2020-05-26 Schirmhülse

Publications (1)

Publication Number Publication Date
WO2021239421A1 true WO2021239421A1 (fr) 2021-12-02

Family

ID=75825812

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2021/061892 WO2021239421A1 (fr) 2020-05-26 2021-05-05 Élément de manchon de blindage

Country Status (3)

Country Link
EP (1) EP4158733A1 (fr)
DE (1) DE102020114088B4 (fr)
WO (1) WO2021239421A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022203219B4 (de) * 2022-03-31 2024-03-28 Yamaichi Electronics Deutschland Gmbh Rundsteckverbinder

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9418806U1 (de) * 1993-11-24 1995-01-12 The Whitaker Corp., Wilmington, Del. Elektrischer Verbinder mit hoher Dichte
US20020025722A1 (en) * 2000-08-04 2002-02-28 Hideho Inagawa Shielded cable with connector
DE202012000421U1 (de) 2012-01-17 2012-02-15 Amphenol-Tuchel Electronics Gmbh Schirmungsanbindung
DE102012105258A1 (de) 2012-06-18 2013-12-19 Tyco Electronics Amp Gmbh Schirmhülse und Abschirmendelement umfassend eine Schirmhülse
DE102012110233A1 (de) 2012-10-26 2014-04-30 Dr. Ing. H.C. F. Porsche Ag Verbindungsvorrichtung zur Übertragung von Hochvoltstrom im Kraftfahrzeugbereich
US20150333449A1 (en) * 2013-01-31 2015-11-19 Tyco Electronics Amp Gmbh Slotted Shield
DE112012002827B4 (de) 2011-07-04 2016-10-20 Ifm Electronic Gmbh Rundsteckverbinder mit abgeschirmtem Anschlusskabel
US20180054027A1 (en) * 2015-03-13 2018-02-22 Fci Usa Llc Electrical connector
DE202019100073U1 (de) 2019-01-09 2019-02-05 Lisa Dräxlmaier GmbH Schirmbuchse für einen Schirm einer Hochvoltleitung und Setzwerkzeug

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5199903A (en) 1991-02-28 1993-04-06 Amp General Patent Counsel Ferruleless back shell
US5358428A (en) 1993-10-12 1994-10-25 Molex Incorporated Shielded electrical connector
CN202094410U (zh) 2011-04-20 2011-12-28 山东天雄电子科技有限公司 电连接器

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9418806U1 (de) * 1993-11-24 1995-01-12 The Whitaker Corp., Wilmington, Del. Elektrischer Verbinder mit hoher Dichte
US20020025722A1 (en) * 2000-08-04 2002-02-28 Hideho Inagawa Shielded cable with connector
DE112012002827B4 (de) 2011-07-04 2016-10-20 Ifm Electronic Gmbh Rundsteckverbinder mit abgeschirmtem Anschlusskabel
DE202012000421U1 (de) 2012-01-17 2012-02-15 Amphenol-Tuchel Electronics Gmbh Schirmungsanbindung
DE102012105258A1 (de) 2012-06-18 2013-12-19 Tyco Electronics Amp Gmbh Schirmhülse und Abschirmendelement umfassend eine Schirmhülse
DE102012110233A1 (de) 2012-10-26 2014-04-30 Dr. Ing. H.C. F. Porsche Ag Verbindungsvorrichtung zur Übertragung von Hochvoltstrom im Kraftfahrzeugbereich
US20150333449A1 (en) * 2013-01-31 2015-11-19 Tyco Electronics Amp Gmbh Slotted Shield
US20180054027A1 (en) * 2015-03-13 2018-02-22 Fci Usa Llc Electrical connector
DE202019100073U1 (de) 2019-01-09 2019-02-05 Lisa Dräxlmaier GmbH Schirmbuchse für einen Schirm einer Hochvoltleitung und Setzwerkzeug

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
QUELLE: EU-RICHTLINIE 2014/30/EU, no. 4, 26 February 2014 (2014-02-26)

Also Published As

Publication number Publication date
EP4158733A1 (fr) 2023-04-05
DE102020114088B4 (de) 2022-01-20
DE102020114088A1 (de) 2021-12-02

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