EP0546884B1 - Press fit connector for a printed circuit board - Google Patents

Press fit connector for a printed circuit board Download PDF

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Publication number
EP0546884B1
EP0546884B1 EP92403208A EP92403208A EP0546884B1 EP 0546884 B1 EP0546884 B1 EP 0546884B1 EP 92403208 A EP92403208 A EP 92403208A EP 92403208 A EP92403208 A EP 92403208A EP 0546884 B1 EP0546884 B1 EP 0546884B1
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EP
European Patent Office
Prior art keywords
pins
board
wing
connector
card
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.)
Expired - Lifetime
Application number
EP92403208A
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German (de)
French (fr)
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EP0546884A1 (en
Inventor
Michel Pesson
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.)
FCI France SA
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Souriau et Cie
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Publication date
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Publication of EP0546884A1 publication Critical patent/EP0546884A1/en
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    • 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

Definitions

  • the invention relates to a connector of the so - called press fit type , that is to say plug-in force on a printed circuit board.
  • such a connector comprises an insulating body carrying a series of bent pins whose proximal branches (with respect to the card) are essentially perpendicular to the card and have a profile allowing the force-fitting in a metallized hole of the printed circuit. , and whose distal branches are essentially parallel to the card and are configured as a male or female connection member.
  • the force-fitting of the pins in the metallized holes of the card is in principle carried out once and for all (unless allowing two or three dismantling of the connector, for example for repair operations), while the connection members carried by the distal branches of the pins are intended to produce an essentially removable electrical connection, typically in the form of a socket located on one face of a box containing the electronic card on which the connector is mounted.
  • the mounting on the card of such a force-fit connector is generally carried out by direct pressing on the pins in their bent region, in order to cause the latter to sink into the metallized holes opposite.
  • the first drawback of this operation is that it requires specific tools for each connector in order to press simultaneously and uniformly on each of the pins of the connector.
  • connection members being oriented in a direction essentially parallel to the card, if the connector is not perfectly pressed against the latter, the axis of the connection members will be offset radially relative to the position that it should have occupied, thus preventing the subsequent realization of a satisfactory mechanical and electrical connection: the consequence is that, when the card provided with its connector will be placed in the box before receiving it, the connection members will not be located exactly arranged, relative to the box, in the exact location they would normally have occupied, if the insulating body of the connector had remained perfectly pressed against the surface of the card.
  • One of the aims of the invention is to remedy these various drawbacks by proposing a new force-fit connector structure which, on the one hand, does not require any specific tool for mounting on the card, therefore with the advantages correlative in terms of simplicity and low cost of implementation and which, on the other hand, guarantees a systematic plating of the insulating body carrying the pins - and therefore perfectly define the geometric position of the connection members relative to the box.
  • Figure 1 shows, in exploded perspective, the constitution of the insulating body of the connector.
  • FIG. 2 shows, in perspective, the connector of the invention, with its various elements assembled, ready to be plugged into a printed circuit board.
  • FIG. 3 is a section, seen in elevation, of the connector of FIG. 2.
  • Figures 4 and 5 are sectional views, respectively in elevation and in plan, of the connector of the invention in a first phase of the mounting operation on the printed circuit board.
  • Figures 6 and 7 are homologous to Figures 4 and 5 for a second phase of the mounting operation.
  • Figures 8 and 9 are equivalent to Figures 4 and 5 for a third phase of the mounting operation.
  • the connector of the invention shown in different aspects in Figures 1 to 3, essentially comprises an insulating body formed by two parts 100, 200 and a series of bent metal pins 300 opening into a metal housing 400 forming a shielding envelope.
  • the part 100 is a generally square-shaped part comprising a first wing 110, oriented parallel to the card 500 (FIG. 3) and which will subsequently be pressed against it, and which will be designated subsequently under the term of "mounting wing", and a second wing 120, perpendicular to the aid 110, which will be designated subsequently by the general term of "connecting wing".
  • This wing 110 has two holes 111 possibly allowing additional fixing on the card, or positioning of the bracket relative to centering pins defined on this same card.
  • the face 112 of the mounting wing facing the card will subsequently come into contact with the surface of the latter and will also serve as a reference surface defining the geometric position of the various elements of the connector.
  • the connecting wing 110 carries a number of cells 121 which will receive the bent pins, and notches 122 allowing the metal case 400 to be held in place by crimping tabs 410 thereof.
  • the connecting wing 110 also includes holes 133 allowing for example the mechanical connection of the connector to the box 600 containing all of the elements.
  • the other part constituting the insulating body of the connector is a part 200 hereinafter called “pressure block”, of generally parallelepiped shape.
  • This block comprises, on the side facing the card, notches 210 at the bottom of which will bend the bent pins 300, as can be seen more explicitly in FIG. 3, these pins coming to bear on the bottom 330 of the notches 210.
  • the block also includes front surfaces 230, defined for example by one of the side walls of grooves 240 and intended to come to bear against the inner face 113 of the mounting wing 110 in the manner which will be indicated in more detail by the after.
  • the block 200 is fitted onto the bracket 100, and for this purpose comprises a relief 250 coming to be placed in a homologous gutter 124 formed on the connecting wing 120 of the bracket; moreover, the grooves 240 cooperate with homologous ribs 114 of the mounting wing 110.
  • the pressure block 200 finally comprises a rear surface 260, essentially flat, against which a pressure force will be applied during the operation of mounting the connector on the card.
  • the pins have the general configuration illustrated in FIG. 3, namely an angled shape. They comprise a first branch 310, hereinafter called “proximal branch”, shaped as illustrated in 311 in order to allow forcing in a metallized hole of the printed circuit.
  • the other branch 320 which will be called “distal branch”, extends perpendicular to the branch 310, therefore parallel to the card; its end is configured, as illustrated in 321, as a male or female connection member (in the example of the figure, in the form of a female pin) so as to produce, in combination with the metal housing 400, an assembly connection for example emerging from the box 600 inside which are mounted the connector and the card.
  • the dimensional accuracy of the placement of the connector relative to the box 600 depends on the dimension d , that is to say the distance between the transverse axis of the connecting wing 120 and the surface of the card 500, so that any defect in placing the bracket against the card will be accompanied by a defect in positioning the connector relative to in box 600.
  • a tool 700 is pressed against the rear face 260 of the pressure block 200, a tool which can be very simple, with for example a simple planar face which the 'is subjected to a force F in order to urge the pressure block 200 - and therefore the entire connector with its pins - in a direction perpendicular to the card.
  • This phase ends when the front face 112 of the mounting wing comes into contact with the surface of the card, the pins 300 then being fully inserted into the metallized holes 510 of the card 500 (final position corresponding to the illustration in FIGS. 6 and 7).
  • the tool 700 is removed, which has the effect of releasing the pressure exerted on the various elements of the connector, and therefore of releasing the internal stresses accumulated during the previous phase , constraints due both to the proper deformation of the different parts of the insulating body and to the bending of the metal pins.
  • the clearance J2 If one has determined, by construction, the clearance J2 so that, on the one hand, it is less than the elastic deformation under stress of the pins (so that, during the second phase illustrated in FIGS. 6 and 7, the faces 113 and 230 come into mutual contact) and that, on the other hand, it is greater than the permanent deformation of the pins and of the insulating body after full insertion of the pins and release of the stresses (so that the final clearance J4 has a positive value , not zero), it can be seen that the outer face 112 of the mounting wing 110 will remain pressed against the surface of the card 500, thus ensuring optimal mechanical mounting and perfect respect for the dimension d defining the position of the connection members. contained in the housing 400 relative to the card 500.

Landscapes

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

Description

L'invention concerne un connecteur du type dit press-fit, c'est-à-dire embrochable à force sur une carte de circuit imprimé.The invention relates to a connector of the so - called press fit type , that is to say plug-in force on a printed circuit board.

Plus précisément, un tel connecteur comporte un corps isolant portant une série de picots coudés dont les branches proximales (par rapport à la carte) sont essentiellement perpendiculaires à la carte et présentent un profil permettant l'embrochage à force dans un trou métallisé du circuit imprimé, et dont les branches distales sont essentiellement parallèles à la carte et sont configurées en organe mâle ou femelle de connexion.More specifically, such a connector comprises an insulating body carrying a series of bent pins whose proximal branches (with respect to the card) are essentially perpendicular to the card and have a profile allowing the force-fitting in a metallized hole of the printed circuit. , and whose distal branches are essentially parallel to the card and are configured as a male or female connection member.

L'embrochage à force des picots dans les trous métallisés de la carte est en principe effectué une fois pour toutes (sauf à permettre deux ou trois démontages du connecteur, par exemple pour des opérations de réparation), tandis que les organes de connexion portés par les branches distales des picots sont destinés à réaliser une liaison électrique essentiellement démontable, typiquement sous forme d'une prise située sur une face d'un coffret renfermant la carte électronique sur laquelle est monté le connecteur.The force-fitting of the pins in the metallized holes of the card is in principle carried out once and for all (unless allowing two or three dismantling of the connector, for example for repair operations), while the connection members carried by the distal branches of the pins are intended to produce an essentially removable electrical connection, typically in the form of a socket located on one face of a box containing the electronic card on which the connector is mounted.

Le montage sur la carte d'un tel connecteur embrochable à force est généralement réalisé par appui direct sur les picots dans leur région coudée, afin de provoquer l'enfoncement de ceux-ci dans les trous métallisés en vis-à-vis.The mounting on the card of such a force-fit connector is generally carried out by direct pressing on the pins in their bent region, in order to cause the latter to sink into the metallized holes opposite.

Cette opération a pour premier inconvénient de nécessiter un outillage spécifique pour chaque connecteur, afin de venir appuyer simultanément et de façon uniforme sur chacun des picots du connecteur.The first drawback of this operation is that it requires specific tools for each connector in order to press simultaneously and uniformly on each of the pins of the connector.

Un autre inconvénient de ces connecteurs connus tient au fait que, après avoir enfoncé complètement les picots dans les trous métallisés et après avoir relâché la pression sur l'outil de montage, la libération des contraintes et les déformations permanentes subies par les différentes pièces du connecteur font en sorte que le corps isolant portant les picots, au lieu de rester parfaitement plaqué contre la surface de la carte, va présenter avec cette dernière un léger interstice, de dimension plus ou moins aléatoire.Another drawback of these known connectors is that, after having fully inserted the pins in the metallized holes and after releasing the pressure on the mounting tool, the release of stresses and the permanent deformations undergone by the various parts of the connector ensure that the insulating body carrying the pins, instead of remaining perfectly pressed against the surface of the card, will present with the latter a slight gap, of more or less random dimension.

La présence de cet interstice se révèle, dans la pratique, particulièrement gênante dans la mesure où, d'une part, la solidité mécanique de la liaison connecteur-carte dépend du parfait placage du corps isolant contre la carte, et que, d'autre part, l'interstice qui va apparaître aura des répercussions sur la précision dimensionnelle du positionnement des organes, mâle ou femelle, de connexion portés par les branches distales des picots.The presence of this gap proves, in practice, particularly troublesome insofar as, on the one hand, the mechanical strength of the connector-card connection depends on the perfect plating of the insulating body against the card, and that, on the other apart, the gap which will appear will have repercussions on the dimensional precision of the positioning of the organs, male or female, of connection carried by the distal branches of the pins.

En effet, ces organes de connexion étant orientés dans une direction essentiellement parallèle à la carte, si le connecteur n'est pas parfaitement plaqué contre cette dernière, l'axe des organes de connexion va se trouver décalé radialement par rapport à la position qu'il aurait dû occuper, empêchant ainsi la réalisation ultérieure d'une liaison mécanique et électrique satisfaisante : la conséquence en est que, lorsque la carte pourvue de son connecteur sera placée dans le coffret devant la recevoir, les organes de connexion ne se trouveront pas exactement disposés, par rapport au coffret, à l'emplacement exact qu'ils auraient dû normalement occuper, si le corps isolant du connecteur était resté parfaitement plaqué contre la surface de la carte.Indeed, these connection members being oriented in a direction essentially parallel to the card, if the connector is not perfectly pressed against the latter, the axis of the connection members will be offset radially relative to the position that it should have occupied, thus preventing the subsequent realization of a satisfactory mechanical and electrical connection: the consequence is that, when the card provided with its connector will be placed in the box before receiving it, the connection members will not be located exactly arranged, relative to the box, in the exact location they would normally have occupied, if the insulating body of the connector had remained perfectly pressed against the surface of the card.

L'un des buts de l'invention est de remédier à ces divers inconvénients, en proposant une nouvelle structure de connecteur embrochable à force qui, d'une part, ne nécessite pour son montage sur la carte aucun outil spécifique, donc avec les avantages corrélatifs en matière de simplicité et de faible coût de mise en oeuvre et qui, d'autre part, garantisse un placage systématique du corps isolant portant les picots - et définisse donc parfaitement la position géométrique des organes de connexion par rapport au coffret.One of the aims of the invention is to remedy these various drawbacks by proposing a new force-fit connector structure which, on the one hand, does not require any specific tool for mounting on the card, therefore with the advantages correlative in terms of simplicity and low cost of implementation and which, on the other hand, guarantees a systematic plating of the insulating body carrying the pins - and therefore perfectly define the geometric position of the connection members relative to the box.

A cet effet, le connecteur de l'invention, qui est du type énoncé au début de la présente description, est caractérisé en ce que le corps isolant comporte :

  • une pièce en forme générale d'équerre, dont une aile, essentiellement parallèle à la carte, est une aile de montage dont la face extérieure vient reposer contre la surface de la carte et dont l'autre aile, essentiellement perpendiculaire à la carte, est une aile de liaison à laquelle sont solidarisés les branches distales des picots, et
  • une pièce formant bloc de pression, présentant:
    • · des premières surfaces d'appui, portant contre les branches distales des picots de manière à exercer sur ces derniers, par application d'une force sollicitant le bloc dans une direction perpendiculaire à la carte, un effort provoquant un enfoncement de ces picots dans les trous métallisés correspondants, et
    • · des secondes surfaces d'appui, portant contre la face intérieure de l'aile de montage de l'équerre,
      la position relative de ces premières et secondes surfaces d'appui étant définie de manière que, lorsque les premières surfaces d'appui viennent porter sans contrainte sur les picots, il subsiste un jeu entre les secondes surfaces d'appui et la face intérieure de l'aile de montage,
      ce jeu étant inférieur à la déformation élastique sous contrainte, perpendiculairement à la carte, des picots lors de l'application de ladite force, de manière à solliciter l'aile de montage en appui contre la carte concomitamment à l'enfoncement des picots dans les trous métallisés, et
      ce jeu étant supérieur à la déformation permanente, perpendiculairement à la carte, des picots et du corps isolant après enfoncement complet des picots et libération des contraintes, de manière à maintenir plaquée contre la carte la face de montage de l'équerre.
To this end, the connector of the invention, which is of the type stated at the beginning of this description, is characterized in that the insulating body comprises:
  • a generally square-shaped part, one wing of which is essentially parallel to the card, is a mounting wing the outer face of which comes to rest against the surface of the card and the other wing of which is essentially perpendicular to the card, is a connecting wing to which the branches are secured distal of the pins, and
  • a piece forming a pressure block, having:
    • · First bearing surfaces, bearing against the distal branches of the pins so as to exert on the latter, by application of a force urging the block in a direction perpendicular to the card, a force causing a depression of these pins in the corresponding metallized holes, and
    • · Second bearing surfaces, bearing against the inner face of the mounting wing of the bracket,
      the relative position of these first and second bearing surfaces being defined so that, when the first bearing surfaces come to bear without constraint on the pins, there is a clearance between the second bearing surfaces and the inner face of the mounting wing,
      this clearance being less than the elastic deformation under stress, perpendicular to the card, of the pins during the application of said force, so as to urge the mounting wing to bear against the card concomitantly with the insertion of the pins in the metallized holes, and
      this clearance being greater than the permanent deformation, perpendicular to the card, of the pins and of the insulating body after full insertion of the pins and release of the stresses, so as to keep pressed against the card the mounting face of the bracket.

On va maintenant décrire un exemple de réalisation du connecteur de l'invention, en référence aux dessins annexés (sur lesquels les mêmes références numériques désignent toujours des éléments identiques).We will now describe an exemplary embodiment of the connector of the invention, with reference to the accompanying drawings (in which the same reference numerals always denote identical elements).

La figure 1 montre, en perspective éclatée, la constitution du corps isolant du connecteur.Figure 1 shows, in exploded perspective, the constitution of the insulating body of the connector.

La figure 2 montre, en perspective, le connecteur de l'invention, avec ses divers éléments assemblés, prêt à être embroché sur une carte de circuit imprimé.FIG. 2 shows, in perspective, the connector of the invention, with its various elements assembled, ready to be plugged into a printed circuit board.

La figure 3 est une coupe, vue en élévation, du connecteur de la figure 2.FIG. 3 is a section, seen in elevation, of the connector of FIG. 2.

Les figures 4 et 5 sont des vues en coupe, respectivement en élévation et en plan, du connecteur de l'invention dans une première phase de l'opération de montage sur la carte de circuit imprimé.Figures 4 and 5 are sectional views, respectively in elevation and in plan, of the connector of the invention in a first phase of the mounting operation on the printed circuit board.

Les figures 6 et 7 sont homologues des figures 4 et 5 pour une seconde phase de l'opération de montage.Figures 6 and 7 are homologous to Figures 4 and 5 for a second phase of the mounting operation.

Les figures 8 et 9 sont homologues des figures 4 et 5 pour une troisième phase de l'opération de montage.Figures 8 and 9 are equivalent to Figures 4 and 5 for a third phase of the mounting operation.

Le connecteur de l'invention, représenté sous différents aspects figures 1 à 3, comporte essentiellement un corps isolant formé de deux pièces 100, 200 et une série de picots coudés métalliques 300 débouchant dans un boîtier métallique 400 formant enveloppe de blindage.The connector of the invention, shown in different aspects in Figures 1 to 3, essentially comprises an insulating body formed by two parts 100, 200 and a series of bent metal pins 300 opening into a metal housing 400 forming a shielding envelope.

La pièce 100 est une pièce en forme générale d'équerre comportant une première aile 110, orientée parallèlement à la carte 500 (figure 3) et qui viendra par la suite se plaquer contre celle-ci, et que l'on désignera par la suite sous le terme d'«aile de montage», et une seconde aile 120, perpendiculaire à l'aide 110, que l'on désignera par la suite sous le terme général d'«aile de liaison». Cette aile 110 comporte deux trous 111 permettant éventuellement une fixation complémentaire sur la carte, ou le positionnement de l'équerre par rapport à des pions de centrage définis sur cette même carte. La face 112 de l'aile de montage tournée vers la carte viendra par la suite en contact avec la surface de celle-ci et servira également de surface de référence définissant la position géométrique des divers éléments du connecteur.The part 100 is a generally square-shaped part comprising a first wing 110, oriented parallel to the card 500 (FIG. 3) and which will subsequently be pressed against it, and which will be designated subsequently under the term of "mounting wing", and a second wing 120, perpendicular to the aid 110, which will be designated subsequently by the general term of "connecting wing". This wing 110 has two holes 111 possibly allowing additional fixing on the card, or positioning of the bracket relative to centering pins defined on this same card. The face 112 of the mounting wing facing the card will subsequently come into contact with the surface of the latter and will also serve as a reference surface defining the geometric position of the various elements of the connector.

L'aile de liaison 110 porte un certain nombre d'alvéoles 121 qui recevront les picots coudés, et des encoches 122 permettant le maintien du boîtier métallique 400 par sertissage de pattes 410 de celui-ci. L'aile de liaison 110 comporte également des trous 133 permettant par exemple la solidarisation mécanique du connecteur au coffret 600 contenant l'ensemble des éléments.The connecting wing 110 carries a number of cells 121 which will receive the bent pins, and notches 122 allowing the metal case 400 to be held in place by crimping tabs 410 thereof. The connecting wing 110 also includes holes 133 allowing for example the mechanical connection of the connector to the box 600 containing all of the elements.

L'autre pièce constituant le corps isolant du connecteur est une pièce 200 appelée par la suite «bloc de pression», de forme générale parallélépipédique. Ce bloc comporte, du côté tourné vers la carte, des encoches 210 au fond desquelles viendront se loger les picots coudés 300, comme on peut le voir plus explicitement sur la figure 3, ces picots venant porter sur le fond 330 des encoches 210. Le bloc comporte par ailleurs des surfaces frontales 230, définies par exemple par l'une des parois latérales de rainures 240 et destinée à venir porter contre la face intérieure 113 de l'aile de montage 110 de la manière qui sera indiquée plus en détail par la suite.The other part constituting the insulating body of the connector is a part 200 hereinafter called “pressure block”, of generally parallelepiped shape. This block comprises, on the side facing the card, notches 210 at the bottom of which will bend the bent pins 300, as can be seen more explicitly in FIG. 3, these pins coming to bear on the bottom 330 of the notches 210. The block also includes front surfaces 230, defined for example by one of the side walls of grooves 240 and intended to come to bear against the inner face 113 of the mounting wing 110 in the manner which will be indicated in more detail by the after.

Le bloc 200 est emboîté sur l'équerre 100, et comporte à cet effet un relief 250 venant se placer dans une gouttière homologue 124 formée sur l'aile de liaison 120 de l'équerre ; par ailleurs, les rainures 240 coopèrent avec des nervures homologues 114 de l'aile de montage 110. Le bloc de pression 200 comporte enfin une surface arrière 260, essentiellement plane, contre laquelle on viendra appliquer un effort de pression lors de l'opération de montage du connecteur sur la carte.The block 200 is fitted onto the bracket 100, and for this purpose comprises a relief 250 coming to be placed in a homologous gutter 124 formed on the connecting wing 120 of the bracket; moreover, the grooves 240 cooperate with homologous ribs 114 of the mounting wing 110. The pressure block 200 finally comprises a rear surface 260, essentially flat, against which a pressure force will be applied during the operation of mounting the connector on the card.

Quant aux picots, ils ont la configuration générale illustrée figure 3, à savoir une forme coudé. Ils comportent une première branche 310, appelée par la suite « branche proximale », conformée comme illustré en 311 afin de permettre l'embrochage à force dans un trou métallisé du circuit imprimé. L'autre branche 320, que l'on appellera «branche distale», s'étend perpendiculairement à la branche 310, donc parallèlement à la carte ; son extrémité est configurée, comme illustré en 321, en organe de connexion mâle ou femelle (dans l'exemple de la figure, sous la forme d'une broche femelle) de manière à réaliser, en combinaison avec le boîtier métallique 400, un ensemble de connexion venant par exemple émerger du coffret 600 à l'intérieur duquel sont montés le connecteur et la carte.As for the pins, they have the general configuration illustrated in FIG. 3, namely an angled shape. They comprise a first branch 310, hereinafter called “proximal branch”, shaped as illustrated in 311 in order to allow forcing in a metallized hole of the printed circuit. The other branch 320, which will be called “distal branch”, extends perpendicular to the branch 310, therefore parallel to the card; its end is configured, as illustrated in 321, as a male or female connection member (in the example of the figure, in the form of a female pin) so as to produce, in combination with the metal housing 400, an assembly connection for example emerging from the box 600 inside which are mounted the connector and the card.

On voit ainsi que la précision dimensionnelle du placement du connecteur par rapport au coffret 600 dépend de la cote d, c'est-à-dire de la distance entre l'axe transversal de l'aile de liaison 120 et la surface de la carte 500, de sorte que tout défaut de placage de l'équerre contre la carte s'accompagnera d'un défaut de positionnement du connecteur par rapport au coffret 600.It is thus seen that the dimensional accuracy of the placement of the connector relative to the box 600 depends on the dimension d , that is to say the distance between the transverse axis of the connecting wing 120 and the surface of the card 500, so that any defect in placing the bracket against the card will be accompanied by a defect in positioning the connector relative to in box 600.

On va maintenant décrire, en référence aux figures 4 à 9, la manière dont le connecteur est monté sur la carte de circuit imprimé.We will now describe, with reference to FIGS. 4 to 9, the manner in which the connector is mounted on the printed circuit board.

Dans une première phase de l'opération de montage, illustrée figures 4 et 5, le connecteur est présenté en face de la carte, sans application d'aucune contrainte extérieure.In a first phase of the assembly operation, illustrated in FIGS. 4 and 5, the connector is presented opposite the card, without the application of any external constraint.

Dans cet état, qui correspond à l'état de repos des différentes pièces, les branches distales 320 des picots viennent porter, sans jeu (J₁ = 0), contre le fond des encoches 210 logeant les picots. En ce qui concerne le positionnement relatif de l'équerre 100 et du bloc de pression 200, ces pièces sont dimensionnées de manière, lorsque la condition d'appui précitée (J₁ = 0) est vérifiée, il subsiste un jeu résiduel J₂ entre la face frontale 230 du bloc de pression 200 et la face intérieure 113 de l'aile de montage 110 de l'équerre 100 ; on indiquera plus bas quelle valeur on donne par conception à ce jeu afin que le connecteur puisse remplir les fonctions voulues.In this state, which corresponds to the state of rest of the different parts, the distal branches 320 of the pins come to bear, without play (J₁ = 0), against the bottom of the notches 210 housing the pins. With regard to the relative positioning of the bracket 100 and the pressure block 200, these parts are dimensioned so that, when the abovementioned support condition (J₁ = 0) is verified, there remains a residual clearance J₂ between the face frontal 230 of the pressure block 200 and the inner face 113 of the mounting wing 110 of the bracket 100; we will indicate below what value we give by design to this game so that the connector can fulfill the desired functions.

Dans une seconde phase de l'opération de montage, illustrée figures 6 et 7, on vient appuyer un outil 700 contre la face arrière 260 du bloc de pression 200, outil qui peut être très simple, avec par exemple une simple face plane que l'on soumet à une force F afin de solliciter le bloc de pression 200 - et donc l'ensemble du connecteur avec ses picots - dans une direction perpendiculaire à la carte.In a second phase of the assembly operation, illustrated in FIGS. 6 and 7, a tool 700 is pressed against the rear face 260 of the pressure block 200, a tool which can be very simple, with for example a simple planar face which the 'is subjected to a force F in order to urge the pressure block 200 - and therefore the entire connector with its pins - in a direction perpendicular to the card.

Le jeu initial J₂ que l'on avait, à la phase précédente, entre les faces 113 et 230 de l'équerre 100 et du bloc 200 se retrouve maintenant reporté en avant de la nervure 114, les deux faces 113 et 230 étant maintenant appliquées l'une contre l'autre, ce qui a pour effet de transmettre, par l'intermédiaire du bloc de pression 200, l'effort appliqué par l'outil 700 à la fois à l'équerre 100 et aux picots 300.The initial clearance J₂ that we had, in the previous phase, between the faces 113 and 230 of the bracket 100 and the block 200 is now found carried forward of the rib 114, the two faces 113 and 230 now being applied one against the other, which has the effect of transmitting, via the pressure block 200, the force applied by the tool 700 both to the bracket 100 and to the pins 300.

Cette phase s'achève lorsque la face frontale 112 de l'aile de montage vient en contact avec la surface de la carte, les picots 300 se trouvant alors enfoncés à fond dans les trous métallisés 510 de la carte 500 (position finale correspondant à l'illustration des figures 6 et 7).This phase ends when the front face 112 of the mounting wing comes into contact with the surface of the card, the pins 300 then being fully inserted into the metallized holes 510 of the card 500 (final position corresponding to the illustration in FIGS. 6 and 7).

Dans la troisième et derrière phase de l'opération de montage, on retire l'outil 700, ce qui a pour effet de relâcher la pression exercée sur les différents éléments du connecteur, et donc de libérer les contraintes internes accumulées lors de la phase précédente, contraintes tenant à la fois à la déformation propre des différentes pièces du corps isolant et à la flexion des picots métalliques.In the third and behind phase of the assembly operation, the tool 700 is removed, which has the effect of releasing the pressure exerted on the various elements of the connector, and therefore of releasing the internal stresses accumulated during the previous phase , constraints due both to the proper deformation of the different parts of the insulating body and to the bending of the metal pins.

Les picots vont alors repousser le bloc de pression 200 vers l'arrière, supprimant le jeu J₃ de la phase précédente et reportant ce jeu vers l'arrière, en J₄, entre les faces 113 et 230 de l'équerre 100 et du bloc de pression 200. Compte tenu de la déformation permanente subie par les différentes pièces du connecteur, ce jeu final J₄ sera inférieur au jeu initial J₂ que l'on avait initialement entre ces deux mêmes surfaces.The pins will then push the pressure block 200 backwards, removing the clearance J₃ from the previous phase and transferring this clearance backwards, in J₄, between the faces 113 and 230 of the bracket 100 and the block of pressure 200. Taking into account the permanent deformation undergone by the various parts of the connector, this final clearance J₄ will be less than the initial clearance J₂ which was initially between these two same surfaces.

Si l'on a déterminé, par construction, le jeu J₂ de manière que, d'une part, il soit inférieur à la déformation élastique sous contrainte des picots (pour que, au cours de la seconde phase illustrée figures 6 et 7, les faces 113 et 230 viennent en contact mutuel) et que, d'autre part, il soit supérieur à la déformation permanente des picots et du corps isolant après enfoncement complet des picots et libération des contraintes (afin que le jeu final J₄ ait une valeur positive, non nulle), on constate que la face extérieure 112 de l'aile de montage 110 restera plaquée contre la surface de la carte 500, assurant ainsi un montage mécanique optimal et un respect parfait de la cote d définissant la position des organes de connexion contenus dans le boîtier 400 par rapport à la carte 500.If one has determined, by construction, the clearance J₂ so that, on the one hand, it is less than the elastic deformation under stress of the pins (so that, during the second phase illustrated in FIGS. 6 and 7, the faces 113 and 230 come into mutual contact) and that, on the other hand, it is greater than the permanent deformation of the pins and of the insulating body after full insertion of the pins and release of the stresses (so that the final clearance J₄ has a positive value , not zero), it can be seen that the outer face 112 of the mounting wing 110 will remain pressed against the surface of the card 500, thus ensuring optimal mechanical mounting and perfect respect for the dimension d defining the position of the connection members. contained in the housing 400 relative to the card 500.

Cette absence de jeu entre le corps isolant du connecteur et la carte de circuit imprimé est un résultat caractéristique de l'invention, qui n'avait jamais pu être atteint jusqu'à présent avec les structure de connecteurs embrochables à picots coudés de l'art antérieur.This absence of play between the insulating body of the connector and the printed circuit board is a characteristic result of the invention, which has never been achieved until now with the plug-in connector structures with bent pins in the art. prior.

Claims (1)

  1. A connector which can be press-fitted onto a printed-circuit board (500), including an insulating body (100, 200) carrying a series of elbowed pins (300) whose proximal branches (310), which are essentially perpendicular to the board, exhibit a profile (311) making it possible for the press-fitting into a plated-through hole (510) of the printed circuit and whose distal branches (320), which are essentially parallel to the board, are configured as a male or female connection member (321),
    characterized in that the insulating body includes:
    - a part (100) having an overall right-angled shape, one wing of which, essentially parallel to the board, is a mounting wing (110) whose outer face (112) rests against the surface of the board and the other wing of which, essentially perpendicular to the board, is a connecting wing (120) to which the distal branches of the pins are fastened, and
    - a part (200) forming a pressure block, exhibiting:
    · first bearing surfaces (220) bearing against the distal branches of the pins so as to exert, on the latter, by application of a force (F) urging the block in a direction perpendicular to the board, a load causing these pins to be forced into the corresponding plated-through holes, and
    · second bearing surfaces (230) bearing against the internal face of the mounting wing of the right-angled part,
    the relative position of these first and second bearing surfaces being defined so that, when the first bearing surfaces bear without stress (J₁ = 0) on the pins, a clearance (J₂) remains between the second bearing surfaces and the internal face of the mounting wing,
    this clearance being less than the elastic deformation under stress, perpendicular to the board, of the pins during the application of the said force, so as to urge the mounting wing to bear against the board concomitantly with the forcing-in of the pins into the plated-through holes, and
    this clearance being greater than the permanent deformation (J₄), perpendicular to the board, of the pins and of the insulating body after the pins have been completely forced in and the stresses released, so as to keep the mounting face of the right-angled part pressed up against the board.
EP92403208A 1991-12-10 1992-11-27 Press fit connector for a printed circuit board Expired - Lifetime EP0546884B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9115295 1991-12-10
FR9115295A FR2684810B1 (en) 1991-12-10 1991-12-10 FORCE PLUGGABLE CONNECTOR ON A PRINTED BOARD.

Publications (2)

Publication Number Publication Date
EP0546884A1 EP0546884A1 (en) 1993-06-16
EP0546884B1 true EP0546884B1 (en) 1994-08-31

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ID=9419869

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92403208A Expired - Lifetime EP0546884B1 (en) 1991-12-10 1992-11-27 Press fit connector for a printed circuit board

Country Status (5)

Country Link
US (1) US5252080A (en)
EP (1) EP0546884B1 (en)
DE (1) DE69200366T2 (en)
ES (1) ES2059199T3 (en)
FR (1) FR2684810B1 (en)

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Also Published As

Publication number Publication date
DE69200366D1 (en) 1994-10-06
EP0546884A1 (en) 1993-06-16
US5252080A (en) 1993-10-12
DE69200366T2 (en) 1995-02-16
FR2684810A1 (en) 1993-06-11
ES2059199T3 (en) 1994-11-01
FR2684810B1 (en) 1994-03-18

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