EP3850710B1 - Elektronische vorrichtung mit elastischen anschlussstiften - Google Patents

Elektronische vorrichtung mit elastischen anschlussstiften Download PDF

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Publication number
EP3850710B1
EP3850710B1 EP19769152.0A EP19769152A EP3850710B1 EP 3850710 B1 EP3850710 B1 EP 3850710B1 EP 19769152 A EP19769152 A EP 19769152A EP 3850710 B1 EP3850710 B1 EP 3850710B1
Authority
EP
European Patent Office
Prior art keywords
blind holes
holes
pins
series
curved
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
EP19769152.0A
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English (en)
French (fr)
Other versions
EP3850710A1 (de
Inventor
François Guillot
Pascal SPOOR
Olivier Roche
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.)
Safran Electronics and Defense SAS
Original Assignee
Safran Electronics and Defense SAS
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Filing date
Publication date
Application filed by Safran Electronics and Defense SAS filed Critical Safran Electronics and Defense SAS
Publication of EP3850710A1 publication Critical patent/EP3850710A1/de
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Publication of EP3850710B1 publication Critical patent/EP3850710B1/de
Active legal-status Critical Current
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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
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50—Fixed connections
    • H01R12/51—Fixed connections for rigid printed circuits or like structures
    • H01R12/55—Fixed connections for rigid printed circuits or like structures characterised by the terminals
    • H01R12/58—Fixed connections for rigid printed circuits or like structures characterised by the terminals terminals for insertion into holes
    • H01R12/585—Terminals having a press fit or a compliant portion and a shank passing through a hole in the printed circuit board
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/71—Coupling devices for rigid printing circuits or like structures
    • H01R12/712—Coupling devices for rigid printing circuits or like structures co-operating with the surface of the printed circuit or with a coupling device exclusively provided on the surface of the printed circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/71—Coupling devices for rigid printing circuits or like structures
    • H01R12/75—Coupling devices for rigid printing circuits or like structures connecting to cables except for flat or ribbon cables
    • 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
    • H01R13/02—Contact members
    • H01R13/03—Contact members characterised by the material, e.g. plating, or coating materials
    • 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
    • H01R13/646—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00 specially adapted for high-frequency, e.g. structures providing an impedance match or phase match
    • H01R13/6473—Impedance matching

Definitions

  • the present invention relates to the field of electronics and more particularly to the field of electrical connection in electronic devices.
  • a pin is generally made of conductive metal and comprises an end section that is elastically deformable in a direction transverse to a longitudinal direction of the pin in such a way that the end section has two outer surface portions, diametrically opposed to each other. the other, which are capable of being elastically brought closer together.
  • the end segment can thus be engaged by force in the metallized hole and the elasticity makes it possible to ensure permanent contact between the conductive coating of the metallized hole and the outer surface portions of the end segment of the pin.
  • pins are known. The most common for common applications are, for example, split pins with a round section or so-called “banana” pins.
  • spindles cannot be used for applications in which the spindles are more stressed (mechanical, vibratory, thermal constraints, etc.) and in particular in aeronautics where the resistance to these stresses is the subject of standards such as the ARINC 600 standard.
  • connectors of the "PRESS-FIT" type comprising pins whose end section has a so-called “needle-cat" shape, that is to say that the end section comprises, between a proximal solid part and a distal solid part, an intermediate part comprising two outwardly arcuate blades so as to have outer surface portions separated from each other by a distance greater than the greatest transverse dimension from the rest of the end section.
  • the blades have first converging ends connected to the proximal solid portion and second converging ends connected to the distal solid part, the outer surface portions providing contact with the metallized hole located on an intermediate part of the blades which is curved.
  • a disadvantage is that this type of pin can be relatively expensive to manufacture to ensure a reliable connection under certain conditions of use.
  • the metallized hole must be long enough to accommodate the distal part and the intermediate part of the end section of the pin, ensuring that the outer surface portions in contact with the electrically conductive coating of the metallized hole are sufficiently engaged in the metallized hole so as not to risk being extracted therefrom under the effect of the stresses applied to the connector and/or to the printed circuit board.
  • the point of contact of the outer surface portions of the pin with the electrically conductive coating of the metallized hole must be at a minimum depth of 0.3 mm with respect to the entry of the metallized hole.
  • the pins of the current connectors generate an iterative break in impedance, or “stub effect”, in the matched lines (therefore with iterative impedance).
  • An object of the invention is to provide an electrical connector pin ensuring a reliable connection.
  • a high-frequency electronic device comprising: a printed circuit board having conductive tracks and at least a first series of blind holes which extend from a first face of the board and which are each provided with an electrically conductive coating connected to at least one of the conductive tracks; and at least one connector which extends from the side of the first face and which comprises a base and pins having a connection section to the base and a free end section.
  • the end segment has a cross-section presenting at least one curved portion around an axis parallel to a longitudinal direction of the end segment and the end segment having side edges which are provided with electrical contact portions and which can be brought together by causing an elastic deformation of the curved portion, the end sections of the pins each being received in one of the holes of the first series of blind holes and the curved portion being elastically deformed in such a way so that the contact portions are elastically applied against the electrically conductive coating.
  • the structure of the pins is relatively simple and the pressure exerted by the contact portions on the surface of the coating of the hole intended to receive the pin can be adjusted by acting on the curvature of the curved portion, the thickness of the end section and/or the choice of material.
  • This shape allows the pin to be sufficiently rigid during its introduction into the hole but also in use once connected while ensuring reliable electrical contact.
  • This structure also makes it possible to have a relatively short end section that can be accommodated in blind holes and more generally in holes of relatively short length (in particular compared to current solutions of the “PRESS-FIT” type). In the high-frequency electronic device, the stub effects will be limited.
  • each of the blind holes interconnects two conductive tracks forming a differential line.
  • the cross section comprises two curved portions around an axis parallel to a longitudinal direction of the end section, the two portions being inverted with respect to each other, the cross section preferably being substantially in the shape of S flattened.
  • the end section comprises a bevelled and/or rounded end part.
  • the plate comprises a second series of blind holes extending opposite the first series of blind holes.
  • PCB printed circuit board
  • the conductive tracks 3 are connected to high-frequency electronic components not shown and form a high-frequency circuit.
  • the holes are a first series of blind holes 4.1 and a second series of blind holes 4.1 which extend facing each other from faces 2.1, 2.2 of substrate 2 opposite to each other.
  • the blind holes 4.1 of each pair of holes facing each other are coaxial with each other and have their ends separated by a distance of approximately 0.4 mm.
  • Each of the blind holes 4.1 interconnects two conductive tracks forming a differential line.
  • the other holes 4.2 are through to open on the two faces 2.1, 2.2.
  • the substrate here has a thickness of 3.2 mm and the holes 4.1 a depth of approximately 1.4 mm.
  • the holes 4.1, 4.2 of each series are spaced from each other by a distance of approximately 2.54 mm.
  • the device comprises connectors 10 comprising a base 11 to which pins generally designated as 12 are fixed.
  • the fixing of the connecting sections 12.1 to the base 11 is carried out in a manner known per se, for example by overmoulding.
  • the electrical connection of each connecting section 12.1 to the electrical cables 13 is made in a manner known per se, for example by brazing.
  • the connecting section 12.1 and the end section 12.2 are here made in one piece of metal.
  • the metal used here is one of the following alloys: CuSn4, CuSn6, CuNiSi, CuCrAgFeTiSi.
  • Each pin 12 is made by cutting a sheet of the metal indicated. Provision is made for a surface treatment by depositing a layer of Nickel with a thickness of around 1.5 ⁇ m with a so-called “flash Nickel” finish over a thickness of around 0.3 to 1.0 ⁇ m.
  • Flash Nickel flash Nickel
  • Pin 12 has a flat elongated shape.
  • flat it is meant that pin 12 has a thickness smaller than its width measured perpendicular to its longitudinal direction.
  • the end section 12.2 of the spindle 12 is made from an initially rectangular cross-section blade which has been deformed to finally present here a wavy shape.
  • the cross section has two curved portions 14, 15 around an axis parallel to a longitudinal direction of the end section 12.2.
  • the two curved portions 14, 15 are inverted relative to each other and the cross section is substantially flattened S-shaped.
  • the end section 12.2 thus has side edges forming electrical contact portions which can be brought closer together by causing an elastic deformation of the curved portions 14, 15.
  • the end section includes an end part 12.3 which here is bevelled. As a variant, the end part 12.3 is rounded.
  • the connectors are mounted on the electronic card 1 by engaging the end sections 12.2 in the holes 4.1, 4.2. In doing so, the transverse deformation of the end sections 12.2 is caused, which causes the lateral edges 16 to come together. This deformation results in an accentuation of the curvature of the curved portions 14, 15. This deformation is carried out gradually due to the shape of the end part 15.3, the bevels also facilitating the centering of the pin in the hole. It will be noted that the force necessary for the deformation of the curved portions 14, 15 depends in particular on the thickness of the blade forming the end section 12.2 and on the initial curvature of the curved portions 14, 15.
  • said thickness will be determined and the initial curvature as a function of the desired insertion force and the desired pressure for applying the side edges 16 against the internal coating 5.
  • the end sections of the pins are driven into the holes with a length between 0.3 mm and 1.4 mm, preferably about 0.85 mm.
  • the end sections 12.2 of the pins 12 are each received in a hole 4.1, 4.2 and remain elastically deformed transversely in such a way that the side edges 16 are elastically applied over their entire length against the electrically conductive coating 5.
  • the fact that the side edges 16 of the end section are in contact over their entire length with the internal coating of the hole limits the risk of an excessively localized concentration of stress which could result in deterioration of the coating.
  • corrugated shape of the cross-section of the end segment provides it with rigidity and relatively good resistance to buckling, facilitating the operation of inserting the end segment into the hole.
  • the side edges 16 are each provided with a contact portion 17 projecting from the rest of the side edge concerned.
  • the contact portions 17 are here triangular in shape and are located in the end part 12.3, the bevels extending in the extension of a front surface of the contact portions.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
  • Multi-Conductor Connections (AREA)

Claims (11)

  1. Elektronische Hochfrequenzvorrichtung, umfassend: eine gedruckte Leiterplatte (1), die Leiterbahnen (3) und mindestens eine erste Reihe von Blindlöchern (4.1) hat, die sich von einer ersten Fläche der Platte erstrecken und die jeweils mit einem elektrisch leitenden Überzug (5) versehen sind, der mit mindestens einer der Leiterbahnen verbunden ist; und mindestens einen Verbinder (10), der sich auf der Seite der ersten Fläche erstreckt und der eine Basis und Stifte (12) umfasst, die einen Verbindungsabschnitt (12.1) zur Verbindung mit der Basis und einen freien Endabschnitt (12.2) haben, dadurch gekennzeichnet, dass der Endabschnitt (12.2) einen Querschnitt hat, der mindestens einen Abschnitt aufweist, der um eine Achse gebogen ist, die parallel zu einer Längsrichtung des Endabschnitts (12.2) ist, und wobei der Endabschnitt (12.2) Seitenränder (16) hat, die mit elektrischen Kontaktabschnitten versehen sind und die aneinander angenähert werden können, indem sie eine elastische Verformung des gebogenen Abschnitts verursachen, wobei die Endabschnitte (12.2) der Stifte jeweils in einem der Löcher der ersten Reihe von Blindlöchern (4.1) aufgenommen sind und wobei der mindestens eine gebogene Abschnitt derart elastisch verformt ist, dass die Kontaktabschnitte elastisch gegen den elektrisch leitenden Überzug gedrückt sind.
  2. Vorrichtung nach Anspruch 1, bei der jedes der Blindlöcher zwei Leiterbahnen, die eine Differenzleitung bilden, miteinander verbindet.
  3. Vorrichtung nach einem der vorhergehenden Ansprüche, bei der der Querschnitt zwei gebogene Abschnitte (14, 15) umfasst, die um eine Achse gebogen sind, die parallel zu einer Längsrichtung des Endabschnittes (12.2) ist, wobei die beiden Abschnitte zueinander gegenläufig sind.
  4. Vorrichtung nach Anspruch 3, bei der der Querschnitt im Wesentlichen die Form eines abgeflachten S hat.
  5. Vorrichtung nach einem der vorhergehenden Ansprüche, bei der der Endabschnitt (12.2) ein abgeschrägtes und/oder abgerundetes Endstück (12.3) umfasst.
  6. Vorrichtung nach einem der vorhergehenden Ansprüche, bei der die Platte eine zweite Reihe von Blindlöchern (4.1) umfasst, die sich gegenüber der ersten Reihe von Blindlöchern (4.1) erstreckt.
  7. Vorrichtung nach dem vorhergehenden Anspruch, bei der die Enden der gegenüberliegenden Blindlöcher voneinander um einen Abstand von ungefähr 0,2 mm beabstandet sind.
  8. Vorrichtung nach einem der vorhergehenden Ansprüche, bei der die Endabschnitte der Stifte um eine Länge zwischen 0,3 mm und 1,4 mm in die Löcher hineingedrückt sind.
  9. Vorrichtung nach dem vorhergehenden Anspruch, bei der die Endabschnitte der Stifte um eine Länge von ungefähr 0,85 mm in die Löcher hineingedrückt sind.
  10. Vorrichtung nach einem der vorhergehenden Ansprüche, bei der die Blindlöcher eine Länge zwischen 1,4 mm und 1,6 mm haben.
  11. Vorrichtung nach einem der vorhergehenden Ansprüche, bei der die Löcher jeder Reihe um einen Abstand von ungefähr 2,54 mm beabstandet sind.
EP19769152.0A 2018-09-14 2019-09-13 Elektronische vorrichtung mit elastischen anschlussstiften Active EP3850710B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1858314A FR3086110B1 (fr) 2018-09-14 2018-09-14 Broche de connexion elastique, connecteur et dispositif electronique comportant de telles broches
PCT/EP2019/074589 WO2020053437A1 (fr) 2018-09-14 2019-09-13 Dispositif electronique comportant des broches de connexion elastique

Publications (2)

Publication Number Publication Date
EP3850710A1 EP3850710A1 (de) 2021-07-21
EP3850710B1 true EP3850710B1 (de) 2022-10-26

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19769152.0A Active EP3850710B1 (de) 2018-09-14 2019-09-13 Elektronische vorrichtung mit elastischen anschlussstiften

Country Status (5)

Country Link
US (1) US11355873B2 (de)
EP (1) EP3850710B1 (de)
CN (1) CN112640220A (de)
FR (1) FR3086110B1 (de)
WO (1) WO2020053437A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11664626B2 (en) * 2021-07-29 2023-05-30 Dell Products L.P. Staggered press-fit fish-eye connector

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3028573A (en) * 1959-05-01 1962-04-03 Automatic Elect Lab Cross-connecting board
US4223970A (en) * 1979-02-26 1980-09-23 Electronics Stamping Corporation Compliant backplane electrical connector
US4415220A (en) * 1981-05-29 1983-11-15 Bell Telephone Laboratories, Incorporated Compliant contact pin
EP0332720A1 (de) * 1988-03-15 1989-09-20 INOVAN GmbH & Co. KG Metalle und Bauelemente Kontaktstift
US5456608A (en) * 1993-08-25 1995-10-10 Conx Corporation Cross-connect system
DE19831394B4 (de) * 1998-07-14 2008-09-11 Marquardt Gmbh Träger für Bauelemente
US6593535B2 (en) * 2001-06-26 2003-07-15 Teradyne, Inc. Direct inner layer interconnect for a high speed printed circuit board
US6984135B2 (en) * 2001-10-01 2006-01-10 Molex Incorporated Press fit pin
JP4299184B2 (ja) * 2004-04-23 2009-07-22 矢崎総業株式会社 基板接続用板端子
JP5686009B2 (ja) * 2011-03-18 2015-03-18 富士通株式会社 基板ユニット、及び、基板ユニットの製造方法
US9136624B1 (en) * 2013-03-28 2015-09-15 Juniper Networks, Inc. Orthogonal cross-connecting of printed circuit boards without a midplane board
DE102013218441A1 (de) * 2013-09-13 2015-04-02 Würth Elektronik Ics Gmbh & Co. Kg Direktsteckvorrichtung mit Vorjustiereinrichtung und relativ zu dieser verschiebbarer Verriegelungseinrichtung
CN107683548B (zh) * 2015-06-03 2020-01-14 3M创新有限公司 薄型电连接器
JP7047431B2 (ja) * 2018-02-08 2022-04-05 富士通株式会社 電子部品及び基板

Also Published As

Publication number Publication date
CN112640220A (zh) 2021-04-09
FR3086110B1 (fr) 2021-05-28
US20210265752A1 (en) 2021-08-26
WO2020053437A1 (fr) 2020-03-19
EP3850710A1 (de) 2021-07-21
US11355873B2 (en) 2022-06-07
FR3086110A1 (fr) 2020-03-20

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