EP0034081B1 - Connexion strip for a pluggable card and connector provided with such a strip - Google Patents

Connexion strip for a pluggable card and connector provided with such a strip Download PDF

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Publication number
EP0034081B1
EP0034081B1 EP81400108A EP81400108A EP0034081B1 EP 0034081 B1 EP0034081 B1 EP 0034081B1 EP 81400108 A EP81400108 A EP 81400108A EP 81400108 A EP81400108 A EP 81400108A EP 0034081 B1 EP0034081 B1 EP 0034081B1
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EP
European Patent Office
Prior art keywords
strip
cover
clip
base
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
Application number
EP81400108A
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German (de)
French (fr)
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EP0034081A1 (en
Inventor
Hervé Bricaud
Bruno Seytre
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Socapex SA
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Socapex SA
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Publication date
Application filed by Socapex SA filed Critical Socapex SA
Publication of EP0034081A1 publication Critical patent/EP0034081A1/en
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Publication of EP0034081B1 publication Critical patent/EP0034081B1/en
Expired legal-status Critical Current

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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
    • H01R12/714—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 with contacts abutting directly the printed circuit; Button contacts therefore provided on the printed circuit

Definitions

  • the present invention relates to the field of connectors for circuits on plug-in cards.
  • Such cards are presented in the form of a quadrilateral plate, made of an electrically insulating material, supporting a plurality of electronic components and the connections which connect them, these being most often produced by depositing on the plate of an electrically conductive metal.
  • connection with the external use circuits is ensured by a plurality of contacts arranged on one or more sides of the plate, cooperating with contacts of complementary shape forming part of a fixed connector connected to the use circuits; this connector generally provides a second function, that of mechanical support of the card in the equipment where it is implemented.
  • the connectors Due to the quadrilateral shape of the plate, the connectors thus take the general structure of elongated blocks in the form of bars, sometimes arranged at right angles on a common flat base.
  • connection bars are four in number, defining a closed quadrilateral
  • the installation for connection and fixing of a plug-in card requires the realization of the connection bars in two parts, capable of '' a relative movement with respect to each other, leading to an implementation in two phases: phase of introduction of the card, corresponding to an open position of the mobile part, phase of connection and fixing of the card , corresponding to the closed position of this part.
  • a terminal strip forming part of such connectors is thus most often in two main parts, made of insulating material, namely a fixed base and a cover provided with rows of conductive contact elements, and joined by an axis of rotation. longitudinal allowing to realize the two open and closed positions indicated above.
  • the closed position applies the contacts of the connector against the plates with a force obtained by choosing an elastic material for constituting them, and essential for ensuring contacts with low electrical resistance.
  • a tightening by screw is generally used between the base and the cover, placed either at the ends of the latter if the bar is short, or at locations distributed along of the bar if it is long.
  • connection device has a major drawback: the operations of connecting and disconnecting the card require accessibility to the part of the base located under the contacts at the axis of rotation of the clamp. This means that such a base cannot be opened or closed when it is fixed to a printed card or any support.
  • connection strip capable of being fixed a support, and making it possible to connect a printed card while maintaining said strip on the support.
  • the connector which is the subject of the present invention does not have any of these drawbacks.
  • connection-disconnection operations corresponding to the closing and opening stages, are practically instantaneous.
  • the invention separates, for the base and the cover, the respective functions of supporting contact elements, and of applying support pressures, which they assume in the connectors of the known art. . It retains only the first for them, and entrusts the second to a different means, creating by elasticity the pressing pressures whose cover ensures only transmission, and endowed with great longitudinal rigidity.
  • This means has the general shape of an angle iron or U-shaped section, "horseshoe-shaped", the great longitudinal rigidity of which is known, and the part which is provided with elasticity thereof is the base of the connecting section, on a section view, the two sides of the horseshoe.
  • the invention consists of a connection strip for a plug-in card, consisting of a base in a rectangular cover supporting a plurality of electrical contact elements provided with elasticity, the cover being able to pivot about an axis. longitudinal parallel to the base, taking two positions, respectively opening for placing the edge of a card, and closing for bringing the respective conductive elements of the strip and the card into contact, as well as '' a pliers in the shape of a profiled beam with a U-section, the two branches of which bear respectively on two zones of the base and of the cover, the said pliers being arranged parallel to the longitudinal axis of the bar, and near the latter, these branches, of unequal lengths, ensuring closure by application of a force obtained by elastic deformation of the connecting base of the two branches, said bar further comprising means of cooperation of the bran che lower short and the tie, characterized in that the cover comprises at least one stud cooperating with at least one corresponding housing carried by the long upper branch of the clamp, allowing the attachment of
  • Figure 1 shows, in a partial perspective sectional view, a plug-in card connector according to the prior art.
  • This connector consists of a base 1, a cover 2, which can pivot relative to each other about the axis 3, and a plurality of contact elements such as 4.
  • the card 5 being placed in the open position of the connector around the axis 3, the closed position compresses the elastic parts 6 and 7 of the contacts, the reaction of which exerts a force F tending to spread the cover of the base.
  • a plurality of screws such as 8 and 9 are used.
  • FIG. 2 shows, in a sectional view, a connection strip for a plug-in card according to the invention.
  • It comprises a base 11, a cover 12 pivoting about the axis 13 and a plurality of contacts such as 14.
  • a separate means constituted by a profile 15 in the form of a beam with U-shaped section or "horseshoe”, section comprising two unequal branches 16 and 17, and a connecting base of the branches 18.
  • This profile which in the following will be designated, by way of simplification, by the name of clamp, is made of an elastic material such as stainless steel. It performs two functions, namely on the one hand the application of a closing force of the bar opposing the elastic forces tending to open it, developed by the contacts, and on the other hand, as a result of the characteristic of longitudinal rigidity of the U-section beams, the function of maintaining the longitudinal linear shape of the cover, which it replaces in this aspect of non-formability.
  • the clamp is fixed by projecting parts 19 and 20 carried by the bar, cooperating with regions of complementary shape carried by the clamp
  • Figure 3 shows, in a perspective view, a closure clip according to the invention. It is presented, in section, along a U-shaped beam with unequal branches 16 and 17; the short branch 17 is provided with a bead 30 for fixing in a housing carried by the base of the bar, and the long branch 16 carries openings such as 31 intended to cooperate with tenons 19 carried on the cover, and visible in Figure 2.
  • Openings 32 are arranged in the connecting base 18 of the branches, the role of which is to allow, by choice of their dimensions, the precise adjustment of the elasticity of the clamp. They can have another role, which will be explained later, when the bar is opened.
  • the clamp carries, at the ends of the long branch 16, two longitudinal tenons 33 and 34, which can penetrate into open housings formed on the upper part of the cover, by constituting pivot pins securing the clamp and the cover, in position opening hours.
  • Figure 4 gives, in a schematic section, an explanatory diagram of the operation of the connection strip.
  • the clamp 15 mounted on the bar exerts on its two parts two equal and opposite forces F1 and F2.
  • the force F exerted by the contacts on the two parts tends to open the bar.
  • the advantageous result of the invention is to obtain that F11 1 and greater than F, uniformly over the entire length of the bar, without the need, as explained above in detail, for perfect rigidity of the cover, which can thus be made of a deformable plastic material of small thickness with respect to the length.
  • FIG. 5 and 6 show a clamp opening device forming part of the present invention.
  • the opening can be obtained by extracting the short branch from its housing using any tool inserted between the connecting base 18 and the base of the bar 11.
  • a particularly advantageous means is constituted by a bent lever 50, the bent part 51 of which can be introduced into one of the openings 32 of the connecting base, in position (a) in FIG. 6.
  • the bent part 51 is supported simultaneously on the base and the connection base, causing the extraction of the clamp, and its rotation around the pins 34, pivoting in the open housings 35 carried by the upper face of the cover 12.
  • the invention thus provides the possibility of producing overlapping plug-in cards with very small spacings, the closing clip, being part of the connection strip of the invention being very thin, and requiring no additional spacing for its placement. in place and its removal, which by the way are practically instantaneous.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Connector Housings Or Holding Contact Members (AREA)

Description

La présente invention se rapporte au domaine des connecteurs pour circuits sur cartes enfichables.The present invention relates to the field of connectors for circuits on plug-in cards.

De telles cartes se présentent sous l'aspect d'une plaquette en forme de quadrilatère, faite d'un matériau électriquement isolant, supportant une pluralité de composants électroniques et les connexions qui les relient, celles-ci étant le plus souvent réalisées par dépôt sur la plaquette d'un métal électriquement bon conducteur.Such cards are presented in the form of a quadrilateral plate, made of an electrically insulating material, supporting a plurality of electronic components and the connections which connect them, these being most often produced by depositing on the plate of an electrically conductive metal.

Le raccordement avec les circuits d'utilisation extérieurs est assuré par une pluralité de contacts disposés sur un ou plusieurs côtés de la plaquette, coopérant avec des contacts de forme complémentaire faisant partie d'un connecteur fixe relié aux circuits d'utilisation; ce connecteur assure en général une deuxième fonction, celle de support mécanique de la carte dans l'équipement où elle est mise en oeuvre.The connection with the external use circuits is ensured by a plurality of contacts arranged on one or more sides of the plate, cooperating with contacts of complementary shape forming part of a fixed connector connected to the use circuits; this connector generally provides a second function, that of mechanical support of the card in the equipment where it is implemented.

Par suite de la forme en quadrilatère de la plaquette, les connecteurs prennent ainsi la structure générale de blocs allongés en forme de barrettes, parfois disposés à angle droit sur un socle plan commun.Due to the quadrilateral shape of the plate, the connectors thus take the general structure of elongated blocks in the form of bars, sometimes arranged at right angles on a common flat base.

Suivant un mode de réalisation souvent rencontré, en particulier quand les barrettes sont au nombre de quatre, définissant un quadrilatère fermé, la mise en place pour raccordement et fixation d'un carte enfichable nécessite la réalisation des barrettes de connexion en deux parties, capables d'un mouvement relatif l'une par rapport à l'autre, conduisant à une mise en oeuvre en deux phases: phase d'introduction de la carte, correspondant à une position ouverte de la partie mobile, phase de raccordement et fixation de la carte, correspondant à la position fermée de cette partie.According to an embodiment often encountered, in particular when the bars are four in number, defining a closed quadrilateral, the installation for connection and fixing of a plug-in card requires the realization of the connection bars in two parts, capable of '' a relative movement with respect to each other, leading to an implementation in two phases: phase of introduction of the card, corresponding to an open position of the mobile part, phase of connection and fixing of the card , corresponding to the closed position of this part.

Ces dispositions apportent de plus, dans certains cas, la possibilité de mettre en place une carte par simple translation parallèlement à une barrette de connexion, la position ouverte mettant en retrait les contacts électriques, et assurant une insertion de la carte à frottement nul.These provisions also provide, in certain cases, the possibility of installing a card by simple translation parallel to a connection strip, the open position withdrawing the electrical contacts, and ensuring insertion of the card with zero friction.

Une barrette de raccordement faisant partie de tels connecteurs se présente ainsi le plus souvent en deux parties principales, réalisées en matériau isolant, à savoir une embase fixe et un capot munis de rangées d'éléments de contact conducteurs, et réunis par un axe de rotation longitudinal permettant de réaliser les deux positions ouverte et fermée indiquées plus haut.A terminal strip forming part of such connectors is thus most often in two main parts, made of insulating material, namely a fixed base and a cover provided with rows of conductive contact elements, and joined by an axis of rotation. longitudinal allowing to realize the two open and closed positions indicated above.

Cependant, la position fermée applique les contacts du connecteur contre les plaquettes avec une force obtenue par choix d'un matériau élastique pour la constitution de ceux-ci, et indispensable pour assurer des contacts à faible résistance électrique.However, the closed position applies the contacts of the connector against the plates with a force obtained by choosing an elastic material for constituting them, and essential for ensuring contacts with low electrical resistance.

Pour compenser la force élastique antagoniste qui en résulte, on fait en général appel à un serrage par vis, entre l'embase et le capot, placées soit aux extrémités de ceux-ci si la barrette est courte, soit à des emplacements répartis le long de la barrette si elle est longue. En donnant, de plus, une épaisseur notable à l'embase et au capot, leur conférant une grande rigidité longitudinale, la déformation entre deux vis successives reste tolérable et ne modifie pas sensiblement la valeur de la résistance électrique de contact.To compensate for the antagonistic elastic force which results therefrom, a tightening by screw is generally used between the base and the cover, placed either at the ends of the latter if the bar is short, or at locations distributed along of the bar if it is long. By giving, in addition, a significant thickness to the base and to the cover, giving them great longitudinal rigidity, the deformation between two successive screws remains tolerable and does not substantially modify the value of the electrical contact resistance.

Il en va tout autrement lorsque les dimensions de connecteurs diminuent, par suite de la tendance à une minaturisation croissante.It is quite different when the dimensions of connectors decrease, due to the tendency to an increasing minaturization.

D'abord, il est de plus en plus fréquent de superposer plusieurs étages de circuits sur carte, et la diminution des encombrements conduit à ne ménager verticalement entre deux barrettes, qu'un espace réduit ne permettant que difficilement l'introduction d'un tournevis.First, it is more and more frequent to superimpose several stages of circuits on a card, and the reduction in overall dimensions means that there is only vertical space between two strips, that a reduced space only makes it difficult to insert a screwdriver. .

Ensuite les épaisseurs des barrettes diminuent et, comme les pressions d'appui imposées par la nécessité des bons contacts électriques restent les mêmes, il est nécessaire de multiplier, en les rapprochant, les vis de serrage entre embase et capot. Il n'est cependant pas possible d'aller très loin dans cette direction, chaque vis prenant la place de plusieurs éléments de contact utiles, et en pratique, les capots s'écartent des embases entre deux vis successives, en prenant la forme d'arcs pour lesquels les contacts présentent de grandes variations de résistance en fonction de leur emplacement sur ceux-ci.Then the thicknesses of the bars decrease and, as the contact pressures imposed by the need for good electrical contacts remain the same, it is necessary to multiply, by bringing them closer, the clamping screws between base and cover. It is however not possible to go very far in this direction, each screw taking the place of several useful contact elements, and in practice, the covers deviate from the bases between two successive screws, taking the form of arcs for which the contacts have large variations in resistance depending on their location on them.

Par ailleurs, l'assemblage par vis présente alors l'inconvénient d'un temps croissant pour les opérations de serrage et desserrage de celles-ci.Furthermore, the assembly by screws then has the disadvantage of an increasing time for the tightening and loosening operations thereof.

Il est enfin à observer que, pour assurer une résistance aussi faible que possible au milieu de chaque arc, on est conduit à y exercer une pression suffisante, qui devient excessive au voisinage de chaque vis, pouvant entraîner des risques de dégradation de contacts ou de rupture de cartes dans le cas de circuits fragiles, comme ceux qui sont réalisés sur plaquettes de céramique par exemple.Finally, it should be observed that, to ensure as low a resistance as possible in the middle of each arc, one is led to exert a sufficient pressure therein, which becomes excessive in the vicinity of each screw, which can lead to risks of degradation of contacts or of breaking of cards in the case of fragile circuits, such as those made on ceramic plates for example.

Il est connu du brevet américain No. 4 023 878 de solidariser une embase de connecteur et une carte à l'aide d'une pince à section en forme de U. Les branches de cette pince, de longueurs inégales, plaquent la carte sur les contacts de l'embase. Le montage et le démontage de la carte s'effectuent par pivotement de la pince autour d'un axe situé à l'extrémité de son bras inférieur et coopérant avec un logement correspondant situé sous l'embase, sensiblement au droit des contacts électriques entre la carte et l'embase.It is known from US Pat. No. 4,023,878 to secure a connector base and a card using a U-shaped section pliers. The branches of this pliers, of unequal lengths, press the card onto the base contacts. The assembly and disassembly of the card is carried out by pivoting the clamp around an axis located at the end of its lower arm and cooperating with a corresponding housing located under the base, substantially in line with the electrical contacts between the card and base.

Un tel dispositif de connexion présente cependant un gros inconvénient: les opérations de connexion et de déconnexion de la carte nécessitent l'accessibilité à la partie de l'embase située sous les contacts au niveau de l'axe de rotation de la pince. Ceci veut dire qu'une telle embase ne peut être ouverte ou fermée lorsqu'elle est fixée sur une carte imprimée ou un support quelconque.However, such a connection device has a major drawback: the operations of connecting and disconnecting the card require accessibility to the part of the base located under the contacts at the axis of rotation of the clamp. This means that such a base cannot be opened or closed when it is fixed to a printed card or any support.

Par conséquent, il n'existe pas à l'heure actuelle de barrette de connexion, susceptible d'être fixé un support, et permettant de connecter une carte imprimée tout en maintenant ladite barrette sur le support.Consequently, at the present time there is no connection strip capable of being fixed a support, and making it possible to connect a printed card while maintaining said strip on the support.

Le connecteur faisant l'objet de la présente invention ne comporte aucun de ces inconvénients.The connector which is the subject of the present invention does not have any of these drawbacks.

Il assure des contacts électriques de résistance faible et sensiblement constante, entre connecteur et circuit sur carte; il permit l'utilisation de barrettes de grande longueur, tout en n'exigeant aucune vis de serrage; enfin, il se prête à une mise en oeuvre dans des équipements miniaturisés, le moyen de serrage des capots sur les embases ayant une épaisseur négligeable. Enfin, les opérations de connexion-déconnexion, correspondant aux étapes de fer meture et d'ouverture, sont pratiquement instantanées.It provides electrical contacts of low and substantially constant resistance, between connector and circuit on board; it allowed the use of long bars, while requiring no tightening screws; finally, it lends itself to being used in miniaturized equipment, the means for tightening the covers on the bases having a negligible thickness. Finally, the connection-disconnection operations, corresponding to the closing and opening stages, are practically instantaneous.

Dans son fondement, l'invention sépare, pour l'embase et le capot, les fonctions respectives de support d'éléments de contact, et d'application de pressions d'appui, qu'ils assument dans les connecteurs de l'art connu. Elle n'en conserve pour eux que la première, et confie la seconde à un moyen différent, créant par élasticité les pressions d'appui dont le capot assure seulement la transmission, et doté d'une grande rigidité longitudinale.In its foundation, the invention separates, for the base and the cover, the respective functions of supporting contact elements, and of applying support pressures, which they assume in the connectors of the known art. . It retains only the first for them, and entrusts the second to a different means, creating by elasticity the pressing pressures whose cover ensures only transmission, and endowed with great longitudinal rigidity.

Ce moyen a la forme générale d'une cornière ou profilé à section en U, "en fer à cheval", dont on connaît la grande rigidité longitudinale, et la partie qui en est dotée d'élasticité est la base du profilé reliant, sur une vue en section, les deux granches du fer à cheval.This means has the general shape of an angle iron or U-shaped section, "horseshoe-shaped", the great longitudinal rigidity of which is known, and the part which is provided with elasticity thereof is the base of the connecting section, on a section view, the two sides of the horseshoe.

Plus précisément, l'invention consiste en une barrette de connexion pour carte enfichable, constituée d'une embase en d'un capot parallélépipédiques supportant une pluralité d'éléments de contact électrique dotés d'élasticité, le capot pouvant pivoter autour d'un axe longitudinal parallèle à l'embase, en prenant deux positions, respectivement d'ouverture pour la mise en place du bord d'une carte, et de fermeture pour la mise en contact des éléments conducteurs respectifs de la barrette et de la carte, ainsi qu'une pince en forme de poutre profilée à section en U, dont les deux branches s'appuient respectivement sur deux zones de l'embase et du capot, ladite pince étant disposée parallèlement à l'axe longitudinal de la barrette, et à proximité de celui-ci, ces branches, d'inégales longueurs, assurant la fermeture par application d'une force procurée par déformation élastique de la base de liaison des deux branches, ladite barrette comportant en outre des moyens de coopération de la branche inférieure courte et de l'embasse, caractérisée en ce que le capot comporte au moins un tenon coopérant avec au moins un logement correspondent porté par la branche supérieure longue de la pince, permettant la fixation de la pince sur la barrette.More specifically, the invention consists of a connection strip for a plug-in card, consisting of a base in a rectangular cover supporting a plurality of electrical contact elements provided with elasticity, the cover being able to pivot about an axis. longitudinal parallel to the base, taking two positions, respectively opening for placing the edge of a card, and closing for bringing the respective conductive elements of the strip and the card into contact, as well as '' a pliers in the shape of a profiled beam with a U-section, the two branches of which bear respectively on two zones of the base and of the cover, the said pliers being arranged parallel to the longitudinal axis of the bar, and near the latter, these branches, of unequal lengths, ensuring closure by application of a force obtained by elastic deformation of the connecting base of the two branches, said bar further comprising means of cooperation of the bran che lower short and the tie, characterized in that the cover comprises at least one stud cooperating with at least one corresponding housing carried by the long upper branch of the clamp, allowing the attachment of the clamp on the bar.

L'invention sera mieux comprise à l'aide de la description ci-après, en s'appuyant sur les figures annexées, où:

  • - la figure 1 représente, suivant une vue en coupe perspective partielle, une barrette de connexion selon l'art connu;
  • - la figure 2 représente, suivant une vue en coupe, une barrette de connextion selon l'invention;
  • - la figure 3 représente, suivant une vue en perspective, une pince de fermeture pour barrette selon l'invention;
  • - la figure 4 représente, un diagramme explicatif du fonctionnement de l'invention;
  • - les figures 5 et 6 représentant un dispositif d'ouverture de la pince faisant partie de l'invention.
The invention will be better understood with the aid of the description below, based on the appended figures, where:
  • - Figure 1 shows, in a partial perspective sectional view, a connection strip according to the known art;
  • - Figure 2 shows, in a sectional view, a connection strip according to the invention;
  • - Figure 3 shows, in a perspective view, a locking clip for bar according to the invention;
  • - Figure 4 shows an explanatory diagram of the operation of the invention;
  • - Figures 5 and 6 showing a clamp opening device forming part of the invention.

La figure 1 représente, suivant une vue en coupe perspective partielle, un connecteur pour carte enfichable suivant l'art connu.Figure 1 shows, in a partial perspective sectional view, a plug-in card connector according to the prior art.

Ce connecteur se compose d'une embase 1, d'un capot 2, pouvant pivoter l'un par rapport à l'autre autour de l'axe 3, et d'une pluralité d'éléments de contacts tels que 4. La carte 5 étant mise en place en position ouverte du connecteur autour de l'axe 3, la position fermée comprime les parties élastiques 6 et 7 des contacts, dont la réaction exerce une force F tendant à écarter le capot de l'embase. Pour s'y opposer, on met en oeuvre une pluralité de vis telles que 8 et 9.This connector consists of a base 1, a cover 2, which can pivot relative to each other about the axis 3, and a plurality of contact elements such as 4. The card 5 being placed in the open position of the connector around the axis 3, the closed position compresses the elastic parts 6 and 7 of the contacts, the reaction of which exerts a force F tending to spread the cover of the base. To oppose it, a plurality of screws such as 8 and 9 are used.

Cependant, ainsi qu'on l'a expliqué plus haut, la région du capot située entre deux vis successives n'est pas appliquée sur l'embase de façon positive, et la droite de contour apparent D fait place, par suite de la déformabilité du matériau isolant, à un contour courbe R, avec tous les inconvénients exposés plus haut qui s'y attachent, concernant la résistance de contact élevée et irrégulière qui en découle, et de plus, la perte de place disponible pour les contacts en face de chaque région de serrage par vis.However, as explained above, the region of the cover situated between two successive screws is not applied to the base in a positive manner, and the line of apparent contour D gives way, due to the deformability of the insulating material, with a curved contour R, with all the disadvantages exposed above attached to it, concerning the high and irregular contact resistance which results therefrom, and moreover, the loss of space available for the contacts opposite each tightening region with screws.

Par ailleurs, dans le cas des équipements à cartes étagées, il est nécessaire, pour permettre l'ouverture, de laisser libre, sur une hauteur au moins égale à longueur d'une vis, la distance entre deux barrettes superposées, con- tainte qui s'oppose aux exigences croissantes de miniaturisation des équipements.Furthermore, in the case of equipment with stepped cards, it is necessary, to allow opening, to leave free, over a height at least equal to the length of a screw, the distance between two superimposed bars, which opposes the increasing requirements for miniaturization of equipment.

La figure 2 représente, suivant une vue en coupe, un barrette de connexion pour carte enfichable selon l'invention.2 shows, in a sectional view, a connection strip for a plug-in card according to the invention.

Elle comporte une embase 11, un capot 12 pivotant autour de l'axe 13 et une pluralité de contacts tels que 14.It comprises a base 11, a cover 12 pivoting about the axis 13 and a plurality of contacts such as 14.

La position fermée est assuré par un moyen séparé, constitué par un profilé 15 en forme de poutre à section en U ou en "fer à cheval", section comportant deux branches inégales 16 et 17, et une base de liaison des branches 18. Ce profilé, qui dans toute la suite, sera désigné, par voie de simplification, par le nom de pince, est réalisé en un matériau élastique tel qu'un acier inoxydable. Il assume deux fonctions, à savoir d'une part l'application d'une force de fermeture de la barrette s'opposant aux forces élastiques tendant à l'ouverture de celle-ci, développées par les contacts, et d'autre part, par suite de la caractéristique de rigidité longitudinale des poutres à section en U, la fonction de maintien de la forme linéaire longitudinale du capot, auquel il se substitue sous cet aspect d'indeformabilité.The closed position is ensured by a separate means, constituted by a profile 15 in the form of a beam with U-shaped section or "horseshoe", section comprising two unequal branches 16 and 17, and a connecting base of the branches 18. This profile, which in the following will be designated, by way of simplification, by the name of clamp, is made of an elastic material such as stainless steel. It performs two functions, namely on the one hand the application of a closing force of the bar opposing the elastic forces tending to open it, developed by the contacts, and on the other hand, as a result of the characteristic of longitudinal rigidity of the U-section beams, the function of maintaining the longitudinal linear shape of the cover, which it replaces in this aspect of non-formability.

La fixation de la pince est assurée par des parties en saillie 19 et 20 portées par la barrette, coopérant avec des régions de forme complémentaire portées par la pinceThe clamp is fixed by projecting parts 19 and 20 carried by the bar, cooperating with regions of complementary shape carried by the clamp

La figure 3 représente, suivant une vue en perspective, une pince de fermeture suivant l'invention. Elle se présente, en section, suivant une poutre en U à branches inégales 16 et 17; la branche courte 17 est munie d'un bourrelet 30 pour la fixation dans un logement porté par l'embase de la barrette, et la branche longue 16 porte des ouvertures telles que 31 destinées à coopérer avec des tenons 19 portés sur le capot, et visibles sur la figure 2.Figure 3 shows, in a perspective view, a closure clip according to the invention. It is presented, in section, along a U-shaped beam with unequal branches 16 and 17; the short branch 17 is provided with a bead 30 for fixing in a housing carried by the base of the bar, and the long branch 16 carries openings such as 31 intended to cooperate with tenons 19 carried on the cover, and visible in Figure 2.

Des ouvertures 32 sont aménagées dans la base de liaison 18 des branches, dont le rôle est de permettre, par choix de leurs dimensions, le réglage précis de l'élasticité de la pince. Elles peuvent avoir un autre rôle, qui sera expliqué plus loin, lors de l'ouverture de la barrette.Openings 32 are arranged in the connecting base 18 of the branches, the role of which is to allow, by choice of their dimensions, the precise adjustment of the elasticity of the clamp. They can have another role, which will be explained later, when the bar is opened.

Enfin, la pince porte, aux extrémités de la branche longue 16, deux tenons longitudinaux 33 et 34, pouvant pénétrer dans des logements ouverts ménagés sur la partie supérieure du capot, en constituant des tourillons de pivotement solidarisant la pince et le capot, en position d'ouverture.Finally, the clamp carries, at the ends of the long branch 16, two longitudinal tenons 33 and 34, which can penetrate into open housings formed on the upper part of the cover, by constituting pivot pins securing the clamp and the cover, in position opening hours.

La figure 4 donne, suivant une coupe schématique, un diagramme explicatif du fonctionnement de la barrette de connexion.Figure 4 gives, in a schematic section, an explanatory diagram of the operation of the connection strip.

La pince 15 montée sur la barrette exerce sur ses deux parties deux forces égales et opposées F1 et F2. La force F exercée par les contacts sur les deux parties tend à ouvrir la barrette.The clamp 15 mounted on the bar exerts on its two parts two equal and opposite forces F1 and F2. The force F exerted by the contacts on the two parts tends to open the bar.

En décomposant les forces appliquées suivant deux directions perpendiculaires, dont l'une est parallèle à F, on obtient des composantes horizontales F12 et F21 équilibrées grâce à l'axe de pivotement 3, et une composante F11 qui est de même direction que F, et de sens opposé.By decomposing the forces applied in two perpendicular directions, one of which is parallel to F, horizontal components F12 and F21 are obtained balanced by the pivot axis 3, and a component F11 which is in the same direction as F, and opposite direction.

Le résultat avantageus de l'invention est d'obtenir que F11 1 et supérieur à F, de façon uniforme sur toute la longueur de la barrette, sans nécessité, comme on l'a expliqué plus haut en détail, d'une rigidité parfaite du capot, qui peut ainsi être réalise en une matière plastique déformable d'épaisseur faible vis-à-vis de la longueur.The advantageous result of the invention is to obtain that F11 1 and greater than F, uniformly over the entire length of the bar, without the need, as explained above in detail, for perfect rigidity of the cover, which can thus be made of a deformable plastic material of small thickness with respect to the length.

Les figures 5 et 6 représentent un dispositif d'ouverture de la pince faisant partie de la présente invention. L'ouverture peut être obtenue par extraction de la branche courte de son logement à l'aide d'un outil quelconque introduit entre la base de liaison 18 et l'embase de la barrette 11. Cependant, un moyen parti- culierement avantageux est constitué par un levier coudé 50, dont la partie coudée 51 peut être introduite dans une des ouvertures 32 de la base de liaison, suivant la position (a) de la figure 6. Par rotation du levier 50 dans le sens de la flèche 52, la partie coudée 51 s'appuie simultanément sur l'embase et la base de liaison, provoquant l'extraction de la pince, et sa rotation autour des tourillons 34, pivotant dans les logements ouverts 35 portés par la face supérieure du capot 12.Figures 5 and 6 show a clamp opening device forming part of the present invention. The opening can be obtained by extracting the short branch from its housing using any tool inserted between the connecting base 18 and the base of the bar 11. However, a particularly advantageous means is constituted by a bent lever 50, the bent part 51 of which can be introduced into one of the openings 32 of the connecting base, in position (a) in FIG. 6. By rotation of the lever 50 in the direction of arrow 52, the bent part 51 is supported simultaneously on the base and the connection base, causing the extraction of the clamp, and its rotation around the pins 34, pivoting in the open housings 35 carried by the upper face of the cover 12.

L'invention apporte ainsi la possibilité de réaliser des superpositions de cartes enfichables étagées avec de très faibles espacements, la pince de fermeture, faisant partie de la barrette de connexion de l'invention étant très mince, et ne nécessitant aucun espacement supplémentaire pour sa mise en place et son retrait, qui par ailleurs sont pratiquement instantanés.The invention thus provides the possibility of producing overlapping plug-in cards with very small spacings, the closing clip, being part of the connection strip of the invention being very thin, and requiring no additional spacing for its placement. in place and its removal, which by the way are practically instantaneous.

Les résultats obtenus dans le domaine des résistances électriques de contact, tant en valeur absolue qu'en régularité, sont, d'autre part, très avantageux par rapport à ceux qui sont obtenus dans le cas de barrettes de connexion de l'art connu, comme le montrent clairement les tableaux comparatifs, ci-après, où le tableau A correspond aux résultats de l'art connu, et le tableau B aux résultats améliorés obtenus avec la barrette de connexion de l'invention.

Figure imgb0001
Figure imgb0002
 The results obtained in the field of electrical contact resistances, both in absolute value and in regularity, are, on the other hand, very advantageous compared to those obtained in the case of connection bars of the known art, as clearly shown in the comparative tables below, where table A corresponds to the results of the known art, and table B to the improved results obtained with the connection strip of the invention.
Figure imgb0001
Figure imgb0002

Claims (7)

1. A plug-in card connecting-strip constituted by a parallelepipedal base (11) and a parallelpipedal cover (12) which support a plurality of electrical contact elements (14) endowed with elasticity, the cover (12) being capable of pivotal displacement about a longitudinal axis (13) parallel to the base (11) so as to take up two positions, an opening position for inserting the edge of a card or a closure position for placing the respective conductive elements (14) of the connecting-strip and of the card in contact with each other, and constituted by a clip (15) in the form of a U-section member, the two arms (16, 17) of which apply against two areas of the base (11) and the cover (12) respectively, the clip (15) being arranged parallel to the longitudinal axis (13) of the strip and close to said axis, the arms (16, 17) of unequal lengths ensuring closure by application of a force produced by elastic deformation of the junction area (18) formed between the two arms (16, 17), said strip comprising moreover means cooperating between the lower shorter arm (17) and the base (11), characterized in that the cover (12) comprises at least one lug (19) cooperating with at least one corresponding recess (31) which is supported by the upper, longer arm (16) of the clip and permits the fixation of the clip (15) in the strip.
2. A connecting-strip according to claim 1, characterized in that the upper arm (16) is applied against the cover (12) substantially in front of the electrical contacts (C1' C2).
3. A connection-strip according to one of the claims 1 or 2, characterized in that the lower arm (17) is a short arm which is provided with a rim (30) for fixing the clip in a recess made in the ase (11).
4. A connection-strip according to one of the claims 1 to 3, characterized in that the upper arm (16) of the clip (15) which applies against the cover (12) is provided at its ends with two pins (33, 34) which can pivot in two recesses (35) of the cover (12).
5. A connection-strip according to one of the claims 1 to 4, characterized in that the junction area (18) of the two arms (16, 17) of the clip (15) is provided with openings (32).
6. A connecting-strip according to claim 5, characterized in that an elbowed lever (50) is placed across one of said openings (32), the elbowed portion (51) being inserted between the base (11) and the junction area (18) of the clip (15), opening of the strip being produced by rotational displacement of the lever about a direction parallel to the longitudinal axis (13) of said strip.
7. A plug-in card connector, characterized in that it comprises at least one strip according to any one of the preceding claims.
EP81400108A 1980-02-07 1981-01-27 Connexion strip for a pluggable card and connector provided with such a strip Expired EP0034081B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8002676 1980-02-07
FR8002676A FR2475809A1 (en) 1980-02-07 1980-02-07 CONNECTOR BAR FOR CONNECTOR CARD, AND CONNECTOR PROVIDED WITH SUCH BARRETTES

Publications (2)

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EP0034081A1 EP0034081A1 (en) 1981-08-19
EP0034081B1 true EP0034081B1 (en) 1984-03-28

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EP81400108A Expired EP0034081B1 (en) 1980-02-07 1981-01-27 Connexion strip for a pluggable card and connector provided with such a strip

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US (1) US4350403A (en)
EP (1) EP0034081B1 (en)
JP (1) JPS56126276A (en)
CA (1) CA1160704A (en)
DE (1) DE3162847D1 (en)
FR (1) FR2475809A1 (en)

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Also Published As

Publication number Publication date
JPS56126276A (en) 1981-10-03
FR2475809B1 (en) 1983-08-19
EP0034081A1 (en) 1981-08-19
US4350403A (en) 1982-09-21
DE3162847D1 (en) 1984-05-03
FR2475809A1 (en) 1981-08-14
CA1160704A (en) 1984-01-17

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