EP3850711B1 - Elastic connection pin, connector and electronic device comprising such pins - Google Patents

Elastic connection pin, connector and electronic device comprising such pins Download PDF

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Publication number
EP3850711B1
EP3850711B1 EP19769153.8A EP19769153A EP3850711B1 EP 3850711 B1 EP3850711 B1 EP 3850711B1 EP 19769153 A EP19769153 A EP 19769153A EP 3850711 B1 EP3850711 B1 EP 3850711B1
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EP
European Patent Office
Prior art keywords
blades
pin
end segment
connector
slot
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
EP19769153.8A
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German (de)
French (fr)
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EP3850711A1 (en
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
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Safran Electronics and Defense SAS
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Publication date
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Publication of EP3850711A1 publication Critical patent/EP3850711A1/en
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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
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
    • H01R13/405—Securing in non-demountable manner, e.g. moulding, riveting
    • 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
    • H01R13/10—Sockets for co-operation with pins or blades
    • H01R13/11—Resilient sockets
    • H01R13/112—Resilient sockets forked sockets having two legs

Definitions

  • the present invention relates to the field of electrical connection and more particularly to electrical connection connectors.
  • PCB printed circuit board
  • 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.
  • the document pin DE102011005073 A1 the document pin DE102011005073 A1 .
  • 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 part 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.
  • An object of the invention is to provide an electrical connector pin ensuring a reliable connection.
  • an electrical connector pin comprising a connection section to the connector and a free end section, the end section having two blades, parallel to each other and spaced from each other, each having two main faces connected to each other by two edges substantially parallel to a longitudinal direction of the pin and one of which is provided with at least one contact portion which extends projecting laterally relative to an outer surface of the connecting section and which is arranged to bite into a surface against which it is applied, the contact portions extending opposite one another and the blades being elastically deformable between a rest position and a close position in which the contact portions are close together.
  • the structure of the pin is relatively simple and the pressure exerted by the contact portions on the surface of the housing intended to receive the pin can be adjusted by varying the distance separating the two edges of the blade and/or the choice of the material.
  • This structure also makes it possible to have a relatively short end section and therefore capable of being used with holes of relatively short length (in particular compared to current solutions of the “PRESS-FIT” type).
  • the end section has a flat cross-section and is provided with a slot passing through the end section in its thickness and extending over a length of the free end section to form the two blades, the two blades each having a first rectilinear edge bordering the slot and a second edge which extends opposite the slot and projecting laterally from which extends the contact portion, the blades being elastically deformable transversely by variation of the width of the slot.
  • the blades are offset relative to each other in a direction perpendicular to the main faces by a distance greater than a thickness of the blades.
  • the invention also relates to an electronic device and a connector implementing such pins.
  • PCB printed circuit board
  • an electronic device comprising a printed circuit board (or PCB), generally designated at 1, comprising an electrically insulating substrate 2 which carries electrically conductive tracks 3 and which is provided with holes 4.1, 4.2 each covered by an electrically conductive internal coating 5 and connected to one of the electrically conductive tracks 3.
  • PCB printed circuit board
  • two series of holes 4.1 are blind and extend coaxially to each other from faces 2.1, 2.2 of the substrate 2 opposite to each other.
  • 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 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 electric cables 13 is produced 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. Each pin 12 is made by cutting a sheet of the metal indicated.
  • Other electrically conductive materials, in particular metals and alloys, can of course be envisaged.
  • Pin 12 has a flat elongated shape.
  • flat it is meant that pin 12 has a smaller thickness than its width measured perpendicular to its longitudinal direction.
  • Pin 12 here has a rectangular section.
  • the end section 12.2 is provided with a slot 14 passing through the end section in its thickness and extending over a length of the end section 12.2 to form two blades 15.
  • the blades 15 are parallel to each other and each have two main faces which are parallel to each other (one of which is visible flat on the figure 1 ) and which are connected to each other by a first rectilinear edge 15.1 bordering the slot 14 and a second edge 15.2 which extends opposite the slot 14.
  • the blades 15 are elastically deformable transversely by variation of the width of the slot, that is to say that the blades 15 can be moved closer to each other and return elastically to a rest position in which they are parallel. to each other.
  • the end section 12.2 is made of a material such that, when the blades have been brought together until they touch, the elastic limit of the material is not reached, i.e. that is to say that, when the force of approximation has ceased, the blades 15 will be able to return elastically to their rest position.
  • the second edge 15.2 is provided with a contact portion 16 which projects laterally with respect to an outer surface of the connecting section 12.1 and which is arranged to bite the surface against which it is applied.
  • the contact portions 16 here have substantially the shape of a triangle having a sharp apex to bite into the surface of the internal coating 5 against which they are applied.
  • the contact portions 16 are arranged on an end part 12.3 of the end section 12.2.
  • the end part 12.3 is bevelled here to facilitate the introduction of the end section 12.2 into the hole 4.1, 4.2 that it is intended to occupy.
  • the end part 12.3 can be 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 elastic blades 15 is caused, this deformation being carried out gradually due to the shape of the end part 15.3 (the bevels also facilitate the centering of the pin in the hole). It will be noted that the force necessary for the deformation of the blades 15 depends in particular on the length of the slot 14. Thus, the length of the slot 14 will be determined as a function of the desired insertion force and the desired pressure of application of the contact portions 16 against the internal coating 5.
  • the end sections 12.2 of the pins 12 are each received in a hole 4.1, 4.2 and the blades 15 remain elastically deformed in such a way that the contact portions 16 are elastically applied against the electrically conductive coating 5.
  • the end section (12.2) is made of a material such that, when the blades (15) bear against one another, the elastic limit of the material is not reached.
  • blind holes 4.1 and relatively short pins 12 makes it possible to maximize the high frequency passbands by minimizing the “stub” effect of the metallized holes on the lines adapted to high frequencies.
  • the pin 12 ' has blades 15' which are offset relative to each other in a direction perpendicular to the main faces of the blades by a distance greater than a thickness of the blades.
  • the electronic device can have any structure whatsoever and in particular: with a number of holes different from that shown, with only blind or through holes, only without facing holes, with a multilayer or single layer PCB.
  • the substrate may have a different thickness and the holes may have a different depth.
  • the technology for mounting components on the printed circuit board is any.
  • the connector may have a structure different from that described.
  • the connector can comply with the ARINC 600 standard or not, be a serial connector or a parallel connector, or in general any pin connector...

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

Description

La présente invention concerne le domaine du raccordement électrique et plus particulièrement les connecteurs de raccordement électriques.The present invention relates to the field of electrical connection and more particularly to electrical connection connectors.

ARRIERE-PLAN TECHNOLOGIQUETECHNOLOGICAL BACKGROUND

Il est connu de raccorder un composant ou dispositif électronique à une plaque de circuit imprimé (communément appelée PCB) en utilisant un connecteur pourvu de broches destinées à être engagées dans des trous qui ont été ménagés dans la plaque de circuit imprimé et qui possèdent une surface interne recouverte d'un revêtement électriquement conducteur relié à des pistes conductrices du circuit imprimé. On parle de trous ou vias métallisés.It is known to connect an electronic component or device to a printed circuit board (commonly called a PCB) using a connector provided with pins intended to be engaged in holes which have been made in the printed circuit board and which have a surface internal covered with an electrically conductive coating connected to the conductive tracks of the printed circuit. We are talking about metallized holes or vias.

Une broche est généralement réalisée en métal conducteur et comprend un tronçon d'extrémité élastiquement déformable dans un sens transversal à une direction longitudinale de la broche de telle manière que le tronçon d'extrémité ait deux portions de surface extérieures, diamétralement opposées l'une à l'autre, qui sont susceptibles d'être élastiquement rapprochées l'une de l'autre. Le tronçon d'extrémité peut ainsi être engagé à force dans le trou métallisé et l'élasticité permet d'assurer un contact permanent entre le revêtement conducteur du trou métallisé et les portions de surfaces extérieures du tronçon d'extrémité de la broche. Par exemple, la broche du document DE102011005073 A1 .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. For example, the document pin DE102011005073 A1 .

Plusieurs formes de broches sont connues. Les plus courantes pour les applications usuelles sont par exemple les broches fendues de section ronde ou les broches dites « banane ».Several forms of pins are known. The most common for common applications are, for example, split pins with a round section or so-called “banana” pins.

Ces broches ne sont pas utilisables pour des applications dans lesquelles les broches sont plus sollicitées (contraintes mécaniques, vibratoires, thermiques...) et notamment dans l'aéronautique où la résistance à ces contraintes fait l'objet de normes telles que la norme ARINC 600.These 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.

Pour ces applications, il est connu des connecteurs de type « PRESS-FIT » comportant des broches dont le tronçon d'extrémité a une forme dite en « chat d'aiguille », c'est-à-dire que le tronçon d'extrémité comprend, entre une partie massive proximale et une partie massive distale, une partie intermédiaire comportant deux lames arquées vers l'extérieur pour avoir des portions de surface extérieure écartées l'une de l'autre d'une distance supérieure à la plus grande dimension transversale du reste du tronçon d'extrémité. Les lames ont des premières extrémités convergentes reliées à la partie massive proximale et des deuxièmes extrémités convergentes reliées à la partie massive distale, les portions de surface extérieure assurant le contact avec le trou métallisé se trouvant sur une partie intermédiaire des lames qui est incurvée.For these applications, connectors of the "PRESS-FIT" type are known 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 part 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.

Un inconvénient est que ce type de broche peut se révéler relativement coûteux à fabriquer pour assurer une connexion fiable dans certaines conditions d'utilisation.A disadvantage is that this type of pin can be relatively expensive to manufacture to ensure a reliable connection under certain conditions of use.

Un autre inconvénient de ce type de broche est que le trou métallisé doit avoir une longueur suffisante pour accueillir la partie distale et la partie intermédiaire du tronçon d'extrémité de la broche en assurant que les portions de surface extérieure en contact avec le revêtement électriquement conducteur du trou métallisé sont suffisamment engagées dans le trou métallisé pour ne pas risquer d'en être extraites sous l'effet des contraintes appliqués au connecteur et/ou à la plaque de circuit imprimé. Ainsi, on considère que le point de contact des portions de surface extérieure de la broche avec le revêtement électriquement conducteur du trou métallisé doit se trouver à une profondeur minimale de 0,3 mm par rapport à l'entrée du trou métallisé.Another disadvantage of this type of pin is that 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. Thus, it is considered that 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.

Ceci conditionne donc l'épaisseur minimale de la plaque de circuit imprimé.This therefore conditions the minimum thickness of the printed circuit board.

OBJET DE L'INVENTIONOBJECT OF THE INVENTION

Un but de l'invention est de fournir une broche de connecteur électrique assurant une connexion fiable.An object of the invention is to provide an electrical connector pin ensuring a reliable connection.

BREF EXPOSE DE L'INVENTIONBRIEF DESCRIPTION OF THE INVENTION

A cet effet, on prévoit, selon l'invention une broche de connecteur électrique, comprenant un tronçon de liaison au connecteur et un tronçon d'extrémité libre, le tronçon d'extrémité ayant deux lames, parallèles l'une à l'autre et écartées l'une de l'autre, ayant chacune deux faces principales reliées l'une à l'autre par deux bords sensiblement parallèles à une direction longitudinale de la broche et dont l'un est pourvu d'au moins une portion de contact qui s'étend en saillie latérale par rapport à une surface externe du tronçon de liaison et qui est agencée pour mordre dans une surface contre laquelle elle est appliquée, les portions de contact s'étendant à l'opposé l'une de l'autre et les lames étant élastiquement déformables entre une position de repos et une position rapprochée dans laquelle les portions de contact sont rapprochées l'une de l'autre.To this end, provision is made, according to the invention, for an electrical connector pin, comprising a connection section to the connector and a free end section, the end section having two blades, parallel to each other and spaced from each other, each having two main faces connected to each other by two edges substantially parallel to a longitudinal direction of the pin and one of which is provided with at least one contact portion which extends projecting laterally relative to an outer surface of the connecting section and which is arranged to bite into a surface against which it is applied, the contact portions extending opposite one another and the blades being elastically deformable between a rest position and a close position in which the contact portions are close together.

Ainsi, la structure de la broche est relativement simple et la pression qu'exercent les portions de contact sur la surface du logement destiné à recevoir la broche peut être ajustée en jouant sur la distance séparant les deux bords de la lame et/ou le choix du matériau. Cette structure permet en outre d'avoir un tronçon d'extrémité relativement court et donc susceptible d'être utilisé avec des trous de relativement faible longueur (en particulier par rapport aux solutions actuelles de type « PRESS-FIT »).Thus, the structure of the pin is relatively simple and the pressure exerted by the contact portions on the surface of the housing intended to receive the pin can be adjusted by varying the distance separating the two edges of the blade and/or the choice of the material. This structure also makes it possible to have a relatively short end section and therefore capable of being used with holes of relatively short length (in particular compared to current solutions of the “PRESS-FIT” type).

De préférence, le tronçon d'extrémité a une section transversale plate et est pourvu d'une fente traversant le tronçon d'extrémité dans son épaisseur et s'étendant sur une longueur du tronçon d'extrémité libre pour former les deux lames, les deux lames ayant chacune un premier bord rectiligne bordant la fente et un deuxième bord qui s'étend à l'opposé de la fente et en saillie latérale duquel s'étend la portion de contact, les lames étant élastiquement déformables transversalement par variation de la largeur de la fente.Preferably, the end section has a flat cross-section and is provided with a slot passing through the end section in its thickness and extending over a length of the free end section to form the two blades, the two blades each having a first rectilinear edge bordering the slot and a second edge which extends opposite the slot and projecting laterally from which extends the contact portion, the blades being elastically deformable transversely by variation of the width of the slot.

En variante, les lames sont décalées l'une par rapport à l'autre selon une direction perpendiculaire aux faces principales d'une distance supérieure à une épaisseur des lames.Alternatively, the blades are offset relative to each other in a direction perpendicular to the main faces by a distance greater than a thickness of the blades.

L'invention a également pour objets un dispositif électronique et un connecteur mettant en oeuvre de telles broches.The invention also relates to an electronic device and a connector implementing such pins.

D'autres caractéristiques et avantages de l'invention ressortiront à la lecture de la description qui suit d'un mode de réalisation particulier et non limitatif de l'invention.Other characteristics and advantages of the invention will become apparent on reading the following description of a particular and non-limiting embodiment of the invention.

BREVE DESCRIPTION DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS

Il sera fait référence aux dessins annexés, parmi lesquels :

  • la figure 1 est une vue en élévation d'une broche selon l'invention ;
  • la figure 2 est une vue en coupe d'un connecteur selon l'invention ;
  • la figure 3 est une vue partielle, en coupe transversale, d'une plaque de circuit imprimé ayant des trous métallisés recevant des broches d'un connecteur selon l'invention ;
  • la figure 4 est une vue en coupe transversale, selon la ligne IV-IV de la figure 1, de la broche de l'invention ;
  • la figure 5 est une vue en bout (côté extrémité libre) d'une broche selon une variante de réalisation, les lames étant dans une position de repos ;
  • la figure 6 est une vue analogue à la figure 5 de la broche selon cette variante de réalisation, les lames étant dans une position rapprochée.
Reference will be made to the attached drawings, among which:
  • there figure 1 is an elevational view of a spindle according to the invention;
  • there figure 2 is a sectional view of a connector according to the invention;
  • there picture 3 is a partial cross-sectional view of a printed circuit board having metallized holes receiving pins of a connector according to the invention;
  • there figure 4 is a cross-sectional view, along line IV-IV of the figure 1 , of the pin of the invention;
  • there figure 5 is an end view (free end side) of a pin according to a variant of realization, the blades being in a rest position;
  • there figure 6 is a view analogous to figure 5 of the spindle according to this variant embodiment, the blades being in a close position.

DESCRIPTION DETAILLEE DE L'INVENTIONDETAILED DESCRIPTION OF THE INVENTION

En référence aux figures 1 à 4, l'invention est ici décrite en application à un dispositif électronique comprenant une plaque de circuit imprimé (ou PCB), généralement désignée en 1, comprenant un substrat électriquement isolant 2 qui porte des pistes électriquement conductrices 3 et qui est pourvu de trous 4.1, 4.2 recouverts chacun par un revêtement interne 5 électriquement conducteur et relié à l'une des pistes électriquement conductrices 3.With reference to figures 1 to 4 , the invention is described here in application to an electronic device comprising a printed circuit board (or PCB), generally designated at 1, comprising an electrically insulating substrate 2 which carries electrically conductive tracks 3 and which is provided with holes 4.1, 4.2 each covered by an electrically conductive internal coating 5 and connected to one of the electrically conductive tracks 3.

Parmi les trous, deux séries de trous 4.1 sont borgnes et s'étendent coaxialement l'un à l'autre depuis des faces 2.1, 2.2 du substrat 2 opposées l'une à l'autre.Among the holes, two series of holes 4.1 are blind and extend coaxially to each other from faces 2.1, 2.2 of the substrate 2 opposite to each other.

Parmi les trous, les autres trous 4.2 sont traversants pour déboucher sur les deux faces 2.1, 2.2.Among the holes, the other holes 4.2 are through to open on the two faces 2.1, 2.2.

Le substrat a ici une épaisseur de 3,2 mm et les trous 4.1 une profondeur de 1,4 mm environ.The substrate here has a thickness of 3.2 mm and the holes 4.1 a depth of approximately 1.4 mm.

Le dispositif comprend des connecteurs 10 comportant une embase 11 à laquelle sont fixées des broches généralement désignées en 12.The device comprises connectors 10 comprising a base 11 to which pins generally designated as 12 are fixed.

Chaque broche 12 possède :

  • un tronçon de liaison 12.1 fixé à l'embase 11 et connecté à un câble électrique 13 ;
  • un tronçon d'extrémité 12.2 s'étendant dans le prolongement du tronçon de liaison 12.1 et ayant une partie terminale libre 12.3.
Each pin 12 has:
  • a connecting section 12.1 fixed to the base 11 and connected to an electric cable 13;
  • an end section 12.2 extending in the extension of the connecting section 12.1 and having a free end part 12.3.

La fixation des tronçons de liaison 12.1 à l'embase 11 est réalisée de manière connue en elle-même par exemple par surmoulage. Le raccordement électrique de chaque tronçon de liaison 12.1 aux câbles électriques 13 est réalisé de manière connue en elle-même par exemple par brasage.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 electric cables 13 is produced in a manner known per se, for example by brazing.

Le tronçon de liaison 12.1 et le tronçon d'extrémité 12.2 sont ici réalisés d'une seule pièce en métal. Le métal utilisé est ici l'un des alliages suivants : CuSn4, CuSn6, CuNiSi, CuCrAgFeTiSi. Chaque broche 12 est fabriquée par découpage d'une tôle du métal indiqué. Il est prévu un traitement de surface par dépôt d'une couche de Nickel d'une épaisseur d'environ 1,5 µm avec une finition dite par « flash Nickel » sur une épaisseur de 0,3 à 1,0 um environ. Chaque broche 12 est fabriquée par découpage d'une tôle du métal indiqué. D'autres matériaux électriquement conducteurs, en particulier des métaux et alliages, sont bien évidemment envisageables.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 μm with a so-called “flash Nickel” finish over a thickness of around 0.3 to 1.0 μm. Each pin 12 is made by cutting a sheet of the metal indicated. Other electrically conductive materials, in particular metals and alloys, can of course be envisaged.

La broche 12 a une forme allongée plate. Par « plate », on entend que la broche 12 a une épaisseur plus faible que sa largeur mesurée perpendiculairement à sa direction longitudinale.Pin 12 has a flat elongated shape. By “flat”, it is meant that pin 12 has a smaller thickness than its width measured perpendicular to its longitudinal direction.

La broche 12 a ici une section rectangulaire.Pin 12 here has a rectangular section.

Selon l'invention, le tronçon d'extrémité 12.2 est pourvu d'une fente 14 traversant le tronçon d'extrémité dans son épaisseur et s'étendant sur une longueur du tronçon d'extrémité 12.2 pour former deux lames 15. Les lames 15 sont parallèles l'une à l'autre et ont chacune deux faces principales qui sont parallèles l'une à l'autre (dont l'une est visible à plat sur la figure 1) et qui sont reliées l'une à l'autre par un premier bord rectiligne 15.1 bordant la fente 14 et un deuxième bord 15.2 qui s'étend à l'opposé de la fente 14.According to the invention, the end section 12.2 is provided with a slot 14 passing through the end section in its thickness and extending over a length of the end section 12.2 to form two blades 15. The blades 15 are parallel to each other and each have two main faces which are parallel to each other (one of which is visible flat on the figure 1 ) and which are connected to each other by a first rectilinear edge 15.1 bordering the slot 14 and a second edge 15.2 which extends opposite the slot 14.

Les lames 15 sont élastiquement déformables transversalement par variation de la largeur de la fente, c'est-à-dire que les lames 15 peuvent être rapprochées l'une de l'autre et revenir élastiquement dans une position de repos dans laquelle elles sont parallèles l'une à l'autre. De préférence, le tronçon d'extrémité 12.2 est dans un matériau tel que, lorsque les lames ont été rapprochées l'une de l'autre jusqu'à se toucher, la limite élastique du matériau n'est pas atteinte, c'est-à-dire que, lorsque l'effort de rapprochement aura cessé, les lames 15 pourront revenir élastiquement dans leur position de repos.The blades 15 are elastically deformable transversely by variation of the width of the slot, that is to say that the blades 15 can be moved closer to each other and return elastically to a rest position in which they are parallel. to each other. Preferably, the end section 12.2 is made of a material such that, when the blades have been brought together until they touch, the elastic limit of the material is not reached, i.e. that is to say that, when the force of approximation has ceased, the blades 15 will be able to return elastically to their rest position.

Le deuxième bord 15.2 est pourvu d'une portion de contact 16 qui s'étend en saillie latérale par rapport à une surface externe du tronçon de liaison 12.1 et qui est agencée pour mordre la surface contre laquelle est appliquée. Les portions de contact 16 ont ici sensiblement la forme d'un triangle ayant un sommet acéré pour mordre dans la surface du revêtement interne 5 contre laquelle elles sont appliquées. Lorsque les lames 15 sont en position de repos, les sommets des portions de contact 16 sont écartés d'une distance supérieure au diamètre des trous 4.1, 4.2.The second edge 15.2 is provided with a contact portion 16 which projects laterally with respect to an outer surface of the connecting section 12.1 and which is arranged to bite the surface against which it is applied. The contact portions 16 here have substantially the shape of a triangle having a sharp apex to bite into the surface of the internal coating 5 against which they are applied. When the blades 15 are in the rest position, the tops of the contact portions 16 are separated by a distance greater than the diameter of the holes 4.1, 4.2.

Les portions de contact 16 sont agencées sur une partie terminale 12.3 du tronçon d'extrémité 12.2. La partie terminale 12.3 est ici biseautée pour faciliter l'introduction du tronçon d'extrémité 12.2 dans le trou 4.1, 4.2 qu'il est destiné à occuper. En variante, à cette même fin, la partie terminale 12.3 peut être arrondie.The contact portions 16 are arranged on an end part 12.3 of the end section 12.2. The end part 12.3 is bevelled here to facilitate the introduction of the end section 12.2 into the hole 4.1, 4.2 that it is intended to occupy. As a variant, for this same purpose, the end part 12.3 can be rounded.

Les connecteurs sont montés sur la carte électronique 1 en engageant les tronçons d'extrémité 12.2 dans les trous 4.1, 4.2. Ce faisant, on provoque la déformation transversale des lames élastiques 15, cette déformation étant réalisées progressivement du fait de la forme de la partie terminale 15.3 (les biseaux facilitent également le centrage de la broche dans le trou). On notera que l'effort nécessaire à la déformation des lames 15 dépend notamment de la longueur de la fente 14. Ainsi, on déterminera la longueur de la fente 14 en fonction de l'effort d'insertion souhaité et de la pression recherchée d'application des portions de contact 16 contre le revêtement interne 5.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 elastic blades 15 is caused, this deformation being carried out gradually due to the shape of the end part 15.3 (the bevels also facilitate the centering of the pin in the hole). It will be noted that the force necessary for the deformation of the blades 15 depends in particular on the length of the slot 14. Thus, the length of the slot 14 will be determined as a function of the desired insertion force and the desired pressure of application of the contact portions 16 against the internal coating 5.

Une fois les connecteurs montés sur la carte électronique 1, les tronçons d'extrémité 12.2 des broches 12 sont reçus chacun dans un trou 4.1, 4.2 et les lames 15 restent déformées élastiquement de telle manière que les portions de contact 16 sont élastiquement appliquées contre le revêtement électriquement conducteur 5. De préférence le tronçon d'extrémité (12.2) est dans un matériau tel que, lorsque les lames (15) sont en appui l'une contre l'autre, la limite élastique du matériau n'est pas atteinte.Once the connectors are mounted on the electronic card 1, the end sections 12.2 of the pins 12 are each received in a hole 4.1, 4.2 and the blades 15 remain elastically deformed in such a way that the contact portions 16 are elastically applied against the electrically conductive coating 5. Preferably the end section (12.2) is made of a material such that, when the blades (15) bear against one another, the elastic limit of the material is not reached.

On notera également que la mise en œuvre de trous borgnes 4.1 et de broches 12 relativement courtes permet de maximiser les bandes passantes hautes fréquences par minimisation de l'effet de « stub » des trous métallisés sur les lignes adaptées aux hautes fréquences.It will also be noted that the implementation of blind holes 4.1 and relatively short pins 12 makes it possible to maximize the high frequency passbands by minimizing the “stub” effect of the metallized holes on the lines adapted to high frequencies.

On note sur la figure 4 que les lames 15 de la broche 12 sont alignées sur un même plan qui est parallèle à l'axe longitudinal de la broche 12 et qui passe par le milieu des bords 15.1, 15.2.We note on the figure 4 that the blades 15 of the spindle 12 are aligned on the same plane which is parallel to the longitudinal axis of the spindle 12 and which passes through the middle of the edges 15.1, 15.2.

Au contraire, dans la variante des figures 5 et 6, la broches 12' a des lames 15' qui sont décalées l'une par rapport à l'autre selon une direction perpendiculaire aux faces principales des lames d'une distance supérieure à une épaisseur des lames.On the contrary, in the variant of figures 5 and 6 , the pin 12 'has blades 15' which are offset relative to each other in a direction perpendicular to the main faces of the blades by a distance greater than a thickness of the blades.

Ainsi, lorsque les lames 15' sont en position rapprochée l'une de l'autre et que les sommets des portions de contact 16' sont écartés d'une distance sensiblement égale au diamètre du trou 4.1, 4.2 (voir la figure 6), les bords 15.1' des lames 15' ne viennent pas en contact l'un de l'autre car les lames 15' vont se chevaucher partiellement du fait de leur décalage relatif.Thus, when the blades 15' are in a position close to each other and the vertices of the contact portions 16' are separated by a distance substantially equal to the diameter of the hole 4.1, 4.2 (see the figure 6 ), the edges 15.1' of the strips 15' do not come into contact with one another because the strips 15' will partially overlap due to their relative offset.

Bien entendu, l'invention n'est pas limitée au mode de réalisation décrit mais englobe toute variante entrant dans le champ de l'invention telle que définie par les revendications.Of course, the invention is not limited to the embodiment described but encompasses any variant falling within the scope of the invention as defined by the claims.

En particulier, le dispositif électronique peut avoir une structure quelconque et notamment : avec un nombre de trous différents de celui représenté, avec des trous uniquement borgnes ou traversants, sans trous en regard uniquement, avec un PCB multicouche ou simple couche. Le substrat peut avoir une épaisseur différente et les trous peuvent avoir une profondeur différente.In particular, the electronic device can have any structure whatsoever and in particular: with a number of holes different from that shown, with only blind or through holes, only without facing holes, with a multilayer or single layer PCB. The substrate may have a different thickness and the holes may have a different depth.

La technologie de montage des composants sur la plaque de circuit imprimé est quelconque.The technology for mounting components on the printed circuit board is any.

Le connecteur peut avoir une structure différente de celle décrite. Le connecteur peut être conforme à la norme ARINC 600 ou pas, être un connecteur série ou un connecteur parallèle, ou d'une manière générale tout connecteur à broches...The connector may have a structure different from that described. The connector can comply with the ARINC 600 standard or not, be a serial connector or a parallel connector, or in general any pin connector...

Les broches peuvent avoir une structure différente de celle décrite, notamment :

  • le tronçon de liaison peut avoir une section quelconque (par exemple non plate) à partir du moment où celle-ci lui confère une rigidité suffisante (résistance au flambage) pour permettre l'engagement du tronçon d'extrémité dans le trou métallisé et par exemple tubulaire, circulaire, carrée ;
  • le tronçon d'extrémité peut avoir des bords arrondis (autour d'un axe parallèle à la direction longitudinale du tronçon d'extrémité) ou plans :
  • le tronçon d'extrémité peut avoir une extrémité pointue pour faciliter son introduction dans le trou. De préférence toutefois, on préfèrera une extrémité biseautée (forme en pointe tronquée) comme sur les figures car la fonction de centrage n'entraîne alors pas d'augmentation significative de la longueur du tronçon d'extrémité ;
  • il est possible de jouer sur l'inclinaison de la surface arrière des portions de contact 17 pour autoriser un retrait de la broche par un opérateur ;
  • les portions de contact peuvent avoir une forme arrondie (circulaire ou en ellipse) à partir du moment où elles comportent au moins une arête leur permettant de mordre dans la surface contre laquelle elles sont appliquées ou autre ;
  • les portions de contact peuvent s'étendre sur toute ou partie de la longueur du tronçon d'extrémité ;
  • les portions de contact peuvent être disposées en retrait de la partie terminale du tronçon d'extrémité ;
  • dans la variante de réalisation des figures 5 et 6, les bords 15.1' peuvent s'étendre dans un même plan ou pas lorsque les lames sont dans leur position au repos (dans ce deuxième cas, les lames peuvent se chevaucher légèrement ou au contraire être séparées par une rainure comme représenté sur les figures 5 et 6) ;
  • la fente peut s'étendre jusqu'au tronçon de liaison, voire se prolonger dans le tronçon de liaison ;
  • le tronçon d'extrémité peut être rapporté sur le tronçon de liaison, en particulier par soudage ou brasage...
Pins may have a different structure than described, including:
  • the connecting section can have any section (for example not flat) from the moment when this gives it sufficient rigidity (resistance to buckling) to allow the engagement of the end section in the metallized hole and for example tubular, circular, square;
  • the end section can have rounded edges (around an axis parallel to the longitudinal direction of the end section) or planes:
  • the end section may have a pointed end to facilitate its insertion into the hole. Preferably, however, a bevelled end (truncated point shape) as in the figures will be preferred because the centering function then does not lead to a significant increase in the length of the end section;
  • it is possible to play on the inclination of the rear surface of the contact portions 17 to allow removal of the pin by an operator;
  • the contact portions can have a rounded shape (circular or ellipse) from the moment they comprise at least one edge allowing them to bite into the surface against which they are applied or other;
  • the contact portions can extend over all or part of the length of the end section;
  • the contact portions can be set back from the terminal part of the end section;
  • in the alternative embodiment of figures 5 and 6 , the edges 15.1' can extend in the same plane or not when the blades are in their position at rest (in this second case, the blades can overlap slightly or, on the contrary, be separated by a groove as represented on the figures 5 and 6 );
  • the slot can extend as far as the connecting section, or even extend into the connecting section;
  • the end section can be attached to the connecting section, in particular by welding or brazing...

Claims (11)

  1. A pin (12) for an electrical connector (10), the pin comprising a link segment (12.1) for linking it to the connector and an end segment (12.2) that is free, the end segment (12.2) having two mutually parallel blades that are spaced apart from each other, each blade having two main faces that are connected together by two edges that are substantially parallel to a longitudinal direction of the pin and one of which is provided with at least one contact portion (16) that projects laterally relative to an outside surface of the link segment (12.1) and that is arranged to bite into a surface against which it is pressed, the contact portions extending oppositely to each other and the blades (15) being elastically deformable between a rest position and a close-together position in which the contact portions are closer together.
  2. A pin according to claim 1, wherein the end segment has a cross-section that is flat and that is provided with a slot (14) passing through the end segment (12.2) in its thickness direction and extending over a length of the free end segment (12.2) so as to form the two blades (15), each of the two blades having a first edge (15.1) lying beside the slot (14) and that is straight, and a second edge (15.2) lying remotely from the slot (14) and that has the contact portion (16) projecting laterally therefrom, the blades (15) being elastically deformable transversely so as to vary the width of the slot.
  3. A pin according to claim 2, wherein the slot (14) also extends into a fraction of the link segment (12.1).
  4. A pin according to claim 2 or claim 3, wherein the end segment (12.2) is made of a material such that, when the blades (15) are pressed against each other, the elastic limit of material is not reached.
  5. A pin according to any preceding claim, wherein the blades (15') are offset relative to each other in a direction perpendicular to their main faces by a distance that is greater than the thickness of the blades.
  6. A pin according to any preceding claim, wherein the contact portions (16) are substantially triangular in shape.
  7. A pin according to any preceding claim, wherein the contact portions (16) are arranged on a terminal portion (12.3) of the end segment (12.2).
  8. A pin according to any preceding claim, wherein the end segment (12.2) has a terminal portion (12.3) that is chamfered or rounded.
  9. An electronic device comprising:
    · a printed circuit board (1) having conductor tracks (3) and holes (4), each provided with an electrically conductive coating (5) connected to a conductive track (3); and
    · at least one connector (10) provided with pins (12) according to any preceding claim, each of the end segments (12.2) of the pins (12) being received in a respective hole (4), and the blades (15) being deformed elastically in such a manner that the contact portions (16) are pressed elastically against the electrically conductive coating (5) and have penetrated into the electrically conductive coating (5).
  10. A device according to claim 9, wherein two of the holes (4.1) are blind holes and extend along a common axis from mutually opposite faces (2.1, 2.2) of a substrate (2) of the board (1).
  11. A connector (10) comprising a base carrying pins (12) according to any one of claims 1 to 8.
EP19769153.8A 2018-09-14 2019-09-13 Elastic connection pin, connector and electronic device comprising such pins Active EP3850711B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1858313A FR3086109B1 (en) 2018-09-14 2018-09-14 ELASTIC CONNECTION PIN, CONNECTOR AND ELECTRONIC DEVICE INCLUDING SUCH PINs
PCT/EP2019/074592 WO2020053438A1 (en) 2018-09-14 2019-09-13 Elastic connection pin, connector and electronic device comprising such pins

Publications (2)

Publication Number Publication Date
EP3850711A1 EP3850711A1 (en) 2021-07-21
EP3850711B1 true EP3850711B1 (en) 2023-03-01

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Application Number Title Priority Date Filing Date
EP19769153.8A Active EP3850711B1 (en) 2018-09-14 2019-09-13 Elastic connection pin, connector and electronic device comprising such pins

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US (1) US11469529B2 (en)
EP (1) EP3850711B1 (en)
CN (1) CN112640219B (en)
FR (1) FR3086109B1 (en)
WO (1) WO2020053438A1 (en)

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CN112640219A (en) 2021-04-09
FR3086109B1 (en) 2021-09-24
CN112640219B (en) 2022-12-02
FR3086109A1 (en) 2020-03-20
US11469529B2 (en) 2022-10-11
WO2020053438A1 (en) 2020-03-19
EP3850711A1 (en) 2021-07-21
US20210249801A1 (en) 2021-08-12

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