EP0812037A1 - Electrical contact socket of a reinforced cage type - Google Patents

Electrical contact socket of a reinforced cage type Download PDF

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Publication number
EP0812037A1
EP0812037A1 EP97108783A EP97108783A EP0812037A1 EP 0812037 A1 EP0812037 A1 EP 0812037A1 EP 97108783 A EP97108783 A EP 97108783A EP 97108783 A EP97108783 A EP 97108783A EP 0812037 A1 EP0812037 A1 EP 0812037A1
Authority
EP
European Patent Office
Prior art keywords
electrical contact
terminal
contact
female electrical
cage
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.)
Granted
Application number
EP97108783A
Other languages
German (de)
French (fr)
Other versions
EP0812037B1 (en
Inventor
Georges Chaillot
Patrice Cappe
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 SA
Original Assignee
Framatome Connectors International SAS
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Filing date
Publication date
Application filed by Framatome Connectors International SAS filed Critical Framatome Connectors International SAS
Publication of EP0812037A1 publication Critical patent/EP0812037A1/en
Application granted granted Critical
Publication of EP0812037B1 publication Critical patent/EP0812037B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • H01R13/113—Resilient sockets co-operating with pins or blades having a rectangular transverse section
    • 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
    • H01R13/42—Securing in a demountable manner
    • H01R13/428—Securing in a demountable manner by resilient locking means on the contact members; by locking means on resilient contact members

Definitions

  • the present invention relates to a female electrical contact terminal in one piece, made of cut and formed sheet metal, intended to receive a male contact. It relates more particularly to a terminal of the type comprising a front body in the form of a cage having a bottom, an upper wall, and two side walls each having an internal tab which is connected to them by a 180 ° fold and which has at the front a cantilevered part constituting a contact blade.
  • Contact terminals of the type defined above are already known, which can be manufactured by cutting, folding, forming and optionally rolling a strip wafer much more economically than the low-cut terminals.
  • the existing contacts made of cut and formed sheet metal have a certain number of drawbacks. If the contact blades are initially in abutment against one another and oppose a high force to their spacing, which is favorable to the establishment of a high contact pressure guaranteeing a good quality electrical connection, the insertion force is high and there is a risk of difficult introduction. This first drawback can become serious if numerous contact terminals are provided in the same connector. If, on the contrary, the contact blades are initially separated, the pressure exerted by each contact blade may in certain cases be insufficient to ensure a good electrical connection.
  • the single or double walled electrical terminals must also resist any tearing or shearing action on the metal strip constituting them.
  • the intersections of the cutting lines can shear, tear under the action of a lateral mechanical thrust exerted on a wall or parallel to this one.
  • the invention thus relates to a female electrical contact terminal obtained from a single plate of electrically conductive metal comprising a rear part allowing its connection with an electric conductor and a front part in the form of a cage consisting of a bottom, two upper half-walls, two side walls provided with means for guiding a male contact during its insertion and means for fixing this cage in connection boxes, these fixing means comprising, among other things, a window made in each wall lateral, a lug carried by a finger provided in the insulation of the connection box.
  • the deformation has a fold oriented towards the inside of the terminal.
  • the deformation has a double fold oriented in a first direction towards the inside of the terminal then oriented 180 ° from the first direction.
  • the plane of the bearing surface defines with the plane perpendicular to the longitudinal axis of the terminal an angle ⁇ between 1 ° and 45 ° and preferably a value of 15 °.
  • Terminal 10 whose final constitution is shown in Figures 1 and 3 to 6, made from a wafer of the kind shown in Figure 2, is intended to be inserted in a connector housing whose general constitution may be conventional.
  • Terminal 10 is in one piece, it can be viewed as having a front body 11 intended to receive a male contact 12 and a rear part or barrel to be crimped 14. These two parts are separated by a transition zone 15.
  • the barrel 14 has two sets of tabs 16 and 18, respectively intended for be crimped onto the core and the sheath of an electric wire 20.
  • the body of the terminal 10 has a cage shape having a bottom 22 and two sides 24. Each side 24 is double. It comprises an external wall 26 and an internal tongue 28. Each external wall 26 is produced by folding the original plate at 90 ° along one of the lines 30 indicated in dashed lines in FIG. 2.
  • the internal tongue 28 is connected to the external wall 26 by a 180 ° fold along the edge indicated at 32 in FIG. 2.
  • the assembly of the two walls and tabs 26 and 28 have a fold at right angles along the lines designated by 34 in the figure. 2.
  • each internal tab 28 is connected to the corresponding external wall 26 only in its rear part.
  • the front part of each internal tab 28 thus constitutes an elastic contact blade 29 for generating pressure on the surface of the male contact 12 when the latter is inserted.
  • each contact blade 29 could be split by a slot over a part of its length from the free end, this allows a more regular support but this fractionation is however not essential.
  • One or both of the contacts may not have a slot. Conversely, it would be possible to provide more than one slot in each contact blade.
  • Each contact blade 29 advantageously has a shape of the kind shown in FIGS. 3 and 4.
  • the cantilever part, forming electrical contact represents a little more than half of the total length of the internal tab 28 and is put in position. forms so as to have an inward camber. It also has a thickened bend 27 directed towards the other contact blade, in the immediate vicinity of its free end.
  • the elastic force due to the bending of the contact blade 29 and tending to bring two blades closer together, is absorbed by a flap 46 of the corresponding outer wall 26, folded back.
  • This flap 46 which also allows the guiding of the male contact during its insertion, thus retains the contact blade 29 in bending preload in a position close to the external wall 26 to which it is linked, that is to say in a position where it is out of contact with the other contact blade 29 which is opposite to it.
  • the fold of the flaps is in front of the end edges of the side walls of the cage and is rounded, which facilitates the introduction of the terminal in the insulator 51 of a connector housing , not shown, and limits the risks of deterioration of this insulator.
  • the bottom and ceiling edges can be softened.
  • openings 50 intended to allow the immobilization of the terminal in an insulator 51 using a locking finger 52 which may have any of the constitutions used at present.
  • this finger is made up by an elongated beam formed during the molding of the insulation, having a lug 53 directed towards the interior of the cell of the insulation and being able to engage in the window 50. Because the beam 52 is extended forward of the lug 53, it is possible to unlock the terminal by pushing a tube through the front passage 54 of the insulation (delimited by an annular lip having a gap allowing the mounting of the tongue 52), this tube coming to slide between the side of the terminal and the beam. Due to the symmetrical location of the two windows 50, the terminal can occupy one or the other of two symmetrical positions in the cell of the insulation.
  • the window 50 has on one of its sides a portion of wall which during manufacture allows the strip to be deformed so as to form a fold 55.
  • This fold 55 defines a shoulder, the surface 56 of which is designed to cooperate with the upper bearing surface 57 of the lug 53 allowing the terminal to be fixed in the cell of the insulation.
  • this deformation 55 is oriented inward and constitutes a stop acting on the outer surface of the contact blade 29 so as to avoid any risk of exceeding the elastic limit of said blade.
  • the folds 55 of the two outer walls 26 converge in the same horizontal plane so that the contact points between the male contact 12 and the contact blades 29 on the one hand and between the contact blades 29 and folds 55 on the other hand define a space which eliminates any possibility of introducing a male contact not conforming to the dimensions of the female terminal.
  • the fold 55 has a double orientation.
  • the first folding directs the pre-cut strip part towards the center of the terminal, then a second operation orientates the same strip part 180 ° towards the outside of the terminal, thus reinforcing the mechanical strength of the shoulder formed by the fold 55
  • the lower surface 56 of the fold 55 has a large bearing surface on the upper surface 57 of the lug 53 which avoids any risk of shearing of the wafer despite the reduction in the thickness of the strip.
  • This surface 56 is substantially greater than the bearing surface 57 so that the force exerted is as homogeneous as possible on these surfaces and does not generate an overhang.
  • the respective planes of the complementary bearing surfaces 56 and 57 define an angle ⁇ with the plane perpendicular to the longitudinal axis of the bollard, so that their respective opposite slopes create an effect of self-engagement between the bollard and the 'insulating.
  • the value of the angle ⁇ of the surface 57 of the lug is between 1 ° and 45 ° and preferably has a value of 15 °.
  • the windows 50a made in the walls of the electrical terminals of the prior art can obviously have the folds 55 although these walls are simple.
  • FIGS. 5 and 5A show a device for consolidating the terminal 10.
  • the flap 46 has a width L substantially equal to the internal width defined by the walls of the bollard once folded so that the lateral edges of the flaps 46 come to bear on the inner surface of the bottom and of the upper half-walls of the bollard.
  • these walls are provided with openings 60 into which engage pins 61 formed on the ends of the lateral edges of the flaps 46.
  • this consolidation of the cage forming the terminal 10 also allows bracing of the walls of this cage and makes it possible to avoid any accidental crushing.
  • the fixing of the flaps 46 in the cage can be carried out by a single stud 61 provided on one or the other of the lateral edges of the flap 46.
  • Figures 6 and 6A show another arrangement capable of strengthening the mechanical rigidity of the terminal in general.
  • transition zone 15 which can undergo deformations or misalignments harmful for the establishment of the terminals in the insulators.
  • this transition zone is of reduced size.
  • the walls 26 of the front body 11 are extended by two branches 71 and 72 in the form of a square which define with the bottom 22 and the wall 26 an opening 70 thus constituted by 4 sides cooperating together in the consolidation of this partially hollowed out area.
  • the opening 70 allows the introduction of any secondary lateral locking device of the terminal in a connector housing.
  • a space 73 allowing the positioning of the end of any wire to be crimped slightly exceeding the dimensions required, thus preventing this wire from pushing back the terminal beyond the standards required for the correct positioning of the terminal in its insulator.
  • the manufacture is carried out by cutting and forming (folding) of copper alloy strips having a thickness of 0.29 mm.
  • the strip is cut to give rise to successive plates of the kind shown in FIG. 2, connected together by a connecting strip 66.
  • the fold lines, indicated by dashed lines in FIG. 2 can be marked with the press.
  • the contact blades 29 are shaped by bending and striking and the flaps 46 are formed.
  • the invention is not limited to the particular embodiments which have been shown and described by way of examples. It is susceptible to many variations. For example, it is possible to constitute a terminal whose faces are not exactly parallel but have a slope; a notch allowing the passage of the male blade at an angle, which is required for certain sealing embodiments, intended to receive a sealing tongue can be provided in front of the contact ceiling. It should be understood that the scope of this patent extends to such variants and more generally than to all others remaining within the framework of equivalences.

Landscapes

  • Connector Housings Or Holding Contact Members (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Insulators (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Manufacturing Of Electrical Connectors (AREA)

Abstract

The connector includes a single sheet of conducting material forming an inner conductor section and an outer reinforced section. The outer section is made up of a base, two half section walls, and two lateral walls, each of the lateral walls has a male section guide contact. The outer guide contact is a strip section with a window (50) for a protruding shoulder (53) in the body. An upper section of the strip is shaped (55) so that it can be placed on the shoulder.

Description

La présente invention concerne une borne de contact électrique femelle d'une seule pièce, en tôle découpée et formée, destinée à recevoir un contact mâle. Elle concerne plus particulièrement une borne du type comprenant un corps avant en forme de cage ayant un fond, une paroi supérieure, et deux parois latérales ayant chacune une languette interne qui leur est raccordée par un pli à 180° et qui présente à l'avant une partie en porte à faux constituant une lame de contact.The present invention relates to a female electrical contact terminal in one piece, made of cut and formed sheet metal, intended to receive a male contact. It relates more particularly to a terminal of the type comprising a front body in the form of a cage having a bottom, an upper wall, and two side walls each having an internal tab which is connected to them by a 180 ° fold and which has at the front a cantilevered part constituting a contact blade.

On connaît déjà des bornes de contact du type ci-dessus défini, pouvant être fabriquées par découpage, pliage, formage et éventuellement roulage d'une plaquette de feuillard de façon beaucoup plus économique que les bornes décolletées. En contrepartie, les contacts existants en tôle découpée et formée présentent un certain nombre d'inconvénients. Si les lames de contact sont initialement en appui l'une contre l'autre et opposent une force élevée à leur écartement, ce qui est favorable à l'établissement d'une pression de contact élevée garant d'une liaison électrique de bonne qualité, la force d'insertion est importante et il existe un risque d'introduction difficile. Ce premier inconvénient peut devenir grave si de nombreuses bornes de contact sont prévues dans un même connecteur. Si au contraire les lames de contact sont initialement séparées, la pression exercée par chaque lame de contact peut dans certains cas être insuffisante pour assurer une bonne liaison électrique.Contact terminals of the type defined above are already known, which can be manufactured by cutting, folding, forming and optionally rolling a strip wafer much more economically than the low-cut terminals. In return, the existing contacts made of cut and formed sheet metal have a certain number of drawbacks. If the contact blades are initially in abutment against one another and oppose a high force to their spacing, which is favorable to the establishment of a high contact pressure guaranteeing a good quality electrical connection, the insertion force is high and there is a risk of difficult introduction. This first drawback can become serious if numerous contact terminals are provided in the same connector. If, on the contrary, the contact blades are initially separated, the pressure exerted by each contact blade may in certain cases be insufficient to ensure a good electrical connection.

Une solution à ce problème technique a été apportée dans la demande de brevet FR-A-2621180 qui décrit une borne de contact femelle qui tout à la fois garantit une liaison électrique satisfaisante et assure un guidage du contact mâle lors de son introduction. C'est ainsi que chaque paroi latérale présente à l'avant un rabat replié vers l'intérieur, retenant la lame de contact en précontrainte de flexion dans une position où elle est hors de contact avec l'autre lame de contact.A solution to this technical problem was provided in patent application FR-A-2621180 which describes a female contact terminal which at the same time guarantees a satisfactory electrical connection and ensures guiding of the male contact during its introduction. Thus each side wall has at the front a flap folded inwards, retaining the contact blade in bending preload in a position where it is out of contact with the other contact blade.

Beaucoup des bornes de contact en tôle pliée existant à ce jour présentent en outre un risque d'écrasement lors de leur manutention en production ou chez les fabricants de harnais. C'est le cas notamment de bornes de contact électrique femelle en forme de cage mais à simple paroi comme celles décrites dans les brevets US-A-4453799 ou EP-A-0697752, ou encore de celles présentant des lames de contact non précontraintes qui ne participent pas à la rigidité de la cage comme décrites par exemple dans la demande de brevet FR-A-2627020.Many of the folded sheet metal contact terminals existing to date also present a risk of being crushed during handling in production or at harness manufacturers. This is the case in particular of female electrical contact terminals in the form of a cage but with a single wall such as those described in patents US-A-4453799 or EP-A-0697752, or also those having non-prestressed contact blades which do not participate in the rigidity of the cage as described for example in patent application FR-A-2627020.

Les bornes électriques à simple ou double paroi doivent par ailleurs résister à toute action d'arrachement ou de cisaillement du feuillard de métal les constituant. C'est ainsi que, du fait des découpes, formages, pliages de ces tôles de faible épaisseur, les intersections des lignes de coupe peuvent se cisailler, se déchirer sous l'action d'une poussée mécanique latérale exercée sur une paroi ou parallèlement à celle-ci.The single or double walled electrical terminals must also resist any tearing or shearing action on the metal strip constituting them. Thus, because of the cuts, forming, folding of these thin sheets, the intersections of the cutting lines can shear, tear under the action of a lateral mechanical thrust exerted on a wall or parallel to this one.

Ce risque est particulièrement élevé dans les zones amincies telle que la zone de transition entre la partie arrière de raccordement à un fil électrique et la partie avant constituée par la cage, ou encore dans les fenêtres de la cage prévues pour permettre la fixation de la borne dans les boîtiers en plastique des connecteurs recevant ces bornes.This risk is particularly high in thinned areas such as the transition area between the rear part for connection to an electric wire and the front part formed by the cage, or even in the windows of the cage provided to allow the terminal to be fixed. in the plastic housings of the connectors receiving these terminals.

Enfin il convient de mentionner le risque de l'introduction en force d'un contact mâle dont le dimensionnement serait supérieur aux dimensions internes de la cage et qui de ce fait appliquerait une pression, sur les lames de contact, supérieure à la pression du seuil de déformation élastique du métal constituant la lame de contact, ce qui entraînerait une détérioration définitive de la lame ayant alors atteint son seuil de déformation plastique.Finally, it is worth mentioning the risk of the forceful introduction of a male contact, the dimensioning of which would be greater than the internal dimensions of the cage and which therefore would apply pressure, on the contact blades, greater than the threshold pressure. of elastic deformation of the metal constituting the contact blade, which would cause definitive deterioration of the blade having then reached its plastic deformation threshold.

Ces inconvénients deviennent particulièrement importants lorsque, pour des impératifs économiques, les fabricants qui recherchent des solutions visant à réduire les coûts sans pénaliser la qualité, envisagent de réduire l'épaisseur du feuillard constituant la plaquette unique de métal électriquement conducteur.These drawbacks become particularly significant when, for economic imperatives, manufacturers who seek solutions aimed at reducing costs without penalizing quality, plan to reduce the thickness of the strip constituting the single plate of electrically conductive metal.

L'invention vise ainsi une borne de contact électrique femelle obtenue a partir d'une plaquette unique de métal électriquement conducteur comportant une partie arrière permettant sa liaison avec un conducteur électrique et une partie avant en forme de cage constituée d'un fond, de deux demi-parois supérieures, de deux parois latérales munies de moyens de guidage d'un contact mâle lors de son insertion et de moyens de fixation de cette cage dans des boîtiers de connexion, ces moyens de fixation comportant entre autre une fenêtre pratiquée dans chaque paroi latérale, un ergot porté par un doigt prévu dans l'isolant du boîtier de connexion.The invention thus relates to a female electrical contact terminal obtained from a single plate of electrically conductive metal comprising a rear part allowing its connection with an electric conductor and a front part in the form of a cage consisting of a bottom, two upper half-walls, two side walls provided with means for guiding a male contact during its insertion and means for fixing this cage in connection boxes, these fixing means comprising, among other things, a window made in each wall lateral, a lug carried by a finger provided in the insulation of the connection box.

Suivant l'invention cette borne est caractérisée en ce qu'au moins une des arêtes de l'ouverture présente une déformation définissant un épaulement dont la surface d'appui est sensiblement supérieure à la surface d'appui de l'ergotAccording to the invention this terminal is characterized in that at least one of the edges of the opening has a deformation defining a shoulder whose bearing surface is substantially greater than the bearing surface of the lug

Au titre d'une première variante la déformation présente un pli orienté vers l'intérieur de la borne.As a first variant, the deformation has a fold oriented towards the inside of the terminal.

Selon une seconde variante la déformation présente un double pli orienté selon une première direction vers l'intérieur de la borne puis orienté à 180° de la première direction.According to a second variant, the deformation has a double fold oriented in a first direction towards the inside of the terminal then oriented 180 ° from the first direction.

Selon une autre caractéristique de l'invention, le plan de la surface d'appui définit avec le plan perpendiculaire à l'axe longitudinal de la borne un angle α compris entre 1° et 45° et de manière préférentielle une valeur de 15°.According to another characteristic of the invention, the plane of the bearing surface defines with the plane perpendicular to the longitudinal axis of the terminal an angle α between 1 ° and 45 ° and preferably a value of 15 °.

L'invention sera mieux comprise à la lecture de la description qui suit d'un mode particulier de réalisation de l'invention, donné à titre d'exemple non limitatif. La description se réfère aux dessins qui l'accompagnent, dans lesquels :

  • la figure 1 est une vue en perspective montrant une borne de contact électrique femelle selon l'invention;
  • la figure 2 est une vue en plan d'une plaquette destinée à être pliée pour constituer la borne de l'invention;
  • les figures 3A et 3B sont des vues en coupe de la partie avant en forme de cage;
  • la figure 4 est une coupe partielle d'une borne positionnée dans un isolant;
  • les figures 5 et 5A sont deux vues en perspective avec une partie arrachée montrant la borne de la figure 1;
  • les figures 6 et 6A sont deux vues en perspective avec une partie arrachée montrant un autre détail de la borne de la figure 1;
  • la figure 7 est une vue en plan d'une plaquette destinée à être pliée pour constituer une borne de l'art antérieur.
The invention will be better understood on reading the following description of a particular embodiment of the invention, given by way of non-limiting example. The description refers to the accompanying drawings, in which:
  • Figure 1 is a perspective view showing a female electrical contact terminal according to the invention;
  • Figure 2 is a plan view of a plate intended to be folded to form the terminal of the invention;
  • FIGS. 3A and 3B are sectional views of the front part in the form of a cage;
  • Figure 4 is a partial section of a terminal positioned in an insulator;
  • Figures 5 and 5A are two perspective views with a part broken away showing the terminal of Figure 1;
  • Figures 6 and 6A are two perspective views with a part broken away showing another detail of the terminal of Figure 1;
  • Figure 7 is a plan view of a plate intended to be folded to form a terminal of the prior art.

La borne dont la constitution finale est montrée en figures 1 et 3 à 6, réalisée à partir d'une plaquette du genre montré en figure 2, est destinée à être insérée dans un boîtier de connecteur dont la constitution générale peut être classique. La borne 10 est d'une seule pièce, elle peut être regardée comme ayant un corps avant 11 destiné à recevoir un contact mâle 12 et une partie arrière ou fût à sertir 14. Ces deux parties sont séparées par une zone de transition 15. Le fût 14 comporte deux jeux de languettes 16 et 18, respectivement destinés à être serties sur l'âme et sur la gaine d'un fil électrique 20.The terminal whose final constitution is shown in Figures 1 and 3 to 6, made from a wafer of the kind shown in Figure 2, is intended to be inserted in a connector housing whose general constitution may be conventional. Terminal 10 is in one piece, it can be viewed as having a front body 11 intended to receive a male contact 12 and a rear part or barrel to be crimped 14. These two parts are separated by a transition zone 15. The barrel 14 has two sets of tabs 16 and 18, respectively intended for be crimped onto the core and the sheath of an electric wire 20.

Le corps de la borne 10 présente une forme de cage ayant un fond 22 et deux côtés 24. Chaque côté 24 est double. Il comprend une paroi externe 26 et une languette interne 28. Chaque paroi externe 26 est réalisée par pliage à 90° de la plaquette d'origine suivant l'une des lignes 30 indiquées en traits mixtes sur la figure 2. La languette interne 28 est reliée à la paroi externe 26 par un pli à 180° suivant l'arête indiquée en 32 sur la figure 2. L'ensemble des deux paroi et languette 26 et 28 présentent un pli à angle droit suivant les lignes désignées par 34 sur la figure 2.The body of the terminal 10 has a cage shape having a bottom 22 and two sides 24. Each side 24 is double. It comprises an external wall 26 and an internal tongue 28. Each external wall 26 is produced by folding the original plate at 90 ° along one of the lines 30 indicated in dashed lines in FIG. 2. The internal tongue 28 is connected to the external wall 26 by a 180 ° fold along the edge indicated at 32 in FIG. 2. The assembly of the two walls and tabs 26 and 28 have a fold at right angles along the lines designated by 34 in the figure. 2.

Comme on le voit sur la figure 2 chaque languette interne 28 n'est raccordée à la paroi externe correspondante 26 que dans sa partie arrière. La partie avant de chaque languette interne 28 constitue ainsi une lame de contact 29 élastique d'appui générant une pression sur la surface du contact mâle 12 lorsque celui-ci est inséré.As seen in Figure 2 each internal tab 28 is connected to the corresponding external wall 26 only in its rear part. The front part of each internal tab 28 thus constitutes an elastic contact blade 29 for generating pressure on the surface of the male contact 12 when the latter is inserted.

Dans un autre mode de réalisation non représenté, chaque lame de contact 29 pourrait être fractionnée par une fente sur une partie de sa longueur à partir de l'extrémité libre, ceci permet un appui plus régulier mais ce fractionnement n'est cependant pas indispensable. L'un des contacts (ou les deux) pourrait être dépourvu de fente. Inversement, il serait possible de prévoir plus d'une fente dans chaque lame de contact.In another embodiment not shown, each contact blade 29 could be split by a slot over a part of its length from the free end, this allows a more regular support but this fractionation is however not essential. One or both of the contacts may not have a slot. Conversely, it would be possible to provide more than one slot in each contact blade.

Entre la paroi 26 et la languette 28 une partie de paroi proche du pli à 180° constitue un demi plafond de cage. Dans le mode de réalisation représenté, la découpe de la plaquette d'origine laisse subsister des languettes 40 en appui de butée l'une contre l'autre et constituant un plafond continu dans la zone en porte à faux des lames de contact 29. Cette dernière solution limite les risques d'accrochage de bornes entre elles lorsqu'elles sont groupées en botte ou en vrac et assure une protection complète des lames de contact.Between the wall 26 and the tongue 28 a part of the wall close to the 180 ° fold constitutes a half cage ceiling. In the embodiment shown, the cutting of the original plate leaves tabs 40 bearing abutment against one another and constituting a continuous ceiling in the cantilevered area of the contact blades 29. This last solution limits the risks for attaching terminals to each other when they are grouped in bundles or in bulk and ensures complete protection of the contact blades.

Chaque lame de contact 29 a avantageusement une forme du genre montré en figures 3 et 4. La partie en porte à faux, formant contact électrique, représente un peu plus de la moitié de la longueur totale de la languette interne 28 et elle est mise en forme de façon à présenter une cambrure vers l'intérieur. Elle présente de plus un coude épaissi 27 dirigé vers l'autre lame de contact, à proximité immédiate de son extrémité libre. La force élastique due au cambrage de la lame de contact 29 et tendant à rapprocher deux lames l'une contre l'autre, est absorbée par un rabat 46 de la paroi externe 26 correspondante, replié vers l'arrière. Ce rabat 46 qui permet de plus le guidage du contact mâle lors de son insertion, retient ainsi la lame de contact 29 en précontrainte de flexion dans une position proche de la paroi externe 26 à laquelle elle est liée, c'est à dire dans une position où elle est hors de contact avec l'autre lame de contact 29 qui lui est opposée. On voit sur la figure 1 que le pli des rabats se trouve en avant des arêtes terminales des parois latérales de la cage et est de forme arrondie, ce qui facilite l'introduction de la borne dans l'isolant 51 d'un boitier de connecteur, non représenté, et limite les risques de détérioration de cet isolant. Pour réduire encore le risque lors de l'introduction, les arêtes du fond et du plafond peuvent être adoucies.Each contact blade 29 advantageously has a shape of the kind shown in FIGS. 3 and 4. The cantilever part, forming electrical contact, represents a little more than half of the total length of the internal tab 28 and is put in position. forms so as to have an inward camber. It also has a thickened bend 27 directed towards the other contact blade, in the immediate vicinity of its free end. The elastic force due to the bending of the contact blade 29 and tending to bring two blades closer together, is absorbed by a flap 46 of the corresponding outer wall 26, folded back. This flap 46 which also allows the guiding of the male contact during its insertion, thus retains the contact blade 29 in bending preload in a position close to the external wall 26 to which it is linked, that is to say in a position where it is out of contact with the other contact blade 29 which is opposite to it. We see in Figure 1 that the fold of the flaps is in front of the end edges of the side walls of the cage and is rounded, which facilitates the introduction of the terminal in the insulator 51 of a connector housing , not shown, and limits the risks of deterioration of this insulator. To further reduce the risk during insertion, the bottom and ceiling edges can be softened.

Dans les parois externes 26 sont ménagées des ouvertures 50 destinées à permettre l'immobilisation de la borne dans un isolant 51 à l'aide d'un doigt de verrouillage 52 qui peut avoir l'une quelconque des constitutions utilisées à l'heure actuelle. Dans le mode de réalisation montré en figure 4, ce doigt est constitué par une poutre allongée ménagée lors du moulage de l'isolant, présentant un ergot 53 dirigé vers l'intérieur de l'alvéole de l'isolant et pouvant s'engager dans la fenêtre 50. Du fait que la poutre 52 se prolonge en avant de l'ergot 53, il est possible de déverrouiller la borne en enfonçant un tube à travers le passage avant 54 de l'isolant (délimité par une lèvre annulaire présentant une brèche permettant le montage de la languette 52), ce tube venant se glisser entre le côté de la borne et la poutre. Du fait de l'emplacement symétrique des deux fenêtres 50, la borne peut occuper l'une ou l'autre de deux positions symétriques dans l'alvéole de l'isolant.In the outer walls 26 are provided openings 50 intended to allow the immobilization of the terminal in an insulator 51 using a locking finger 52 which may have any of the constitutions used at present. In the embodiment shown in FIG. 4, this finger is made up by an elongated beam formed during the molding of the insulation, having a lug 53 directed towards the interior of the cell of the insulation and being able to engage in the window 50. Because the beam 52 is extended forward of the lug 53, it is possible to unlock the terminal by pushing a tube through the front passage 54 of the insulation (delimited by an annular lip having a gap allowing the mounting of the tongue 52), this tube coming to slide between the side of the terminal and the beam. Due to the symmetrical location of the two windows 50, the terminal can occupy one or the other of two symmetrical positions in the cell of the insulation.

Comme il est visible sur les figures 2 à 4, la fenêtre 50 présente sur l'un de ses cotés une portion de paroi qui lors de la fabrication permet la réalisation d'une déformation du feuillard de manière à former un pli 55. Ce pli 55 définit un épaulement dont la surface 56 est prévue pour coopérer avec la surface d'appui supérieure 57 de l'ergot 53 permettant la fixation de la borne dans l'alvéole de l'isolant.As can be seen in FIGS. 2 to 4, the window 50 has on one of its sides a portion of wall which during manufacture allows the strip to be deformed so as to form a fold 55. This fold 55 defines a shoulder, the surface 56 of which is designed to cooperate with the upper bearing surface 57 of the lug 53 allowing the terminal to be fixed in the cell of the insulation.

On notera que l'extrémité de cette déformation 55 est orientée vers l'intérieur et constitue une butée agissant sur la surface extérieure de la lame de contact 29 de façon à éviter tout risque de dépassement de la limite élastique de ladite lame.It will be noted that the end of this deformation 55 is oriented inward and constitutes a stop acting on the outer surface of the contact blade 29 so as to avoid any risk of exceeding the elastic limit of said blade.

Cette disposition, combinée à la disposition décrite ci-dessus selon laquelle le rabat 46 retient en précontrainte de flexion la lame de contact 29, permet ainsi de maîtriser la pression de contact de la lame sur le contact mâle en continu, c'est à dire tout au long de la vie de la borne, à chaque insertion de ce dernier.This arrangement, combined with the arrangement described above according to which the flap 46 retains the contact blade 29 in bending preload, thus makes it possible to control the contact pressure of the blade on the male contact continuously, that is to say throughout the life of the terminal, each time it is inserted.

L'avantage d'une telle disposition permet grâce aux deux déformations, à savoir le rabat 46 et le pli 55, la définition d'un jeu délimitant le déplacement de la lame de contact 29 entre une position dite passive lorsqu'elle est retenue par le rabat 46 et qu'aucun contact mâle n'est inséré et une position dite active lorsqu'elle limite l'écartement maximum de la lame sous l'effort créé par l'introduction du contact mâle.The advantage of such an arrangement allows, thanks to the two deformations, namely the flap 46 and the fold 55, the definition of a clearance delimiting the movement of the contact blade 29 between a so-called passive position when it is retained by the flap 46 and that no male contact is inserted and a so-called active position when it limits the maximum spacing of the blade under the force created by the introduction of the male contact.

Comme on le voit sur la figure 3, les plis 55 des deux parois externes 26 convergent dans un même plan horizontal de façon à ce que les points de contact entre le contact mâle 12 et les lames de contact 29 d'une part et entre les lames de contact 29 et les plis 55 d'autre part définissent un espace qui élimine toute possibilité d'introduire un contact mâle non conforme aux dimensions de la borne femelle.As seen in Figure 3, the folds 55 of the two outer walls 26 converge in the same horizontal plane so that the contact points between the male contact 12 and the contact blades 29 on the one hand and between the contact blades 29 and folds 55 on the other hand define a space which eliminates any possibility of introducing a male contact not conforming to the dimensions of the female terminal.

Comme décrit en figure 4, le pli 55 présente une double orientation. Le premier pliage oriente la partie de feuillard prédécoupé vers le centre de la borne, puis une seconde opération oriente à 180° la même partie de feuillard vers l'extérieur de la borne renforçant ainsi la tenue mécanique de l'épaulement constitué par le pli 55. On notera d'autre part que la surface inférieure 56 du pli 55 présente une surface d'appui importante sur la surface supérieure 57 de l'ergot 53 ce qui évite tout risque de cisaillement de la plaquette malgré la diminution de l'épaisseur du feuillard. Cette surface 56 est sensiblement supérieure à la surface d'appui 57 de façon à ce que l'effort exercé soit le plus homogène possible sur ces surfaces et n'engendre pas de porte à faux.As described in Figure 4, the fold 55 has a double orientation. The first folding directs the pre-cut strip part towards the center of the terminal, then a second operation orientates the same strip part 180 ° towards the outside of the terminal, thus reinforcing the mechanical strength of the shoulder formed by the fold 55 On the other hand, it will be noted that the lower surface 56 of the fold 55 has a large bearing surface on the upper surface 57 of the lug 53 which avoids any risk of shearing of the wafer despite the reduction in the thickness of the strip. This surface 56 is substantially greater than the bearing surface 57 so that the force exerted is as homogeneous as possible on these surfaces and does not generate an overhang.

Les plans respectifs des surfaces d'appui complémentaires 56 et 57 définissent un angle α avec le plan perpendiculaire à l'axe longitudinal de la borne, de manière à ce que leur pentes opposées respectives créent un effet d'auto engagement entre la borne et l'isolant. A titre d'exemple la valeur de l'angle α de la surface 57 de l'ergot est compris entre 1° et 45° et de manière préférentielle présente une valeur de 15°.The respective planes of the complementary bearing surfaces 56 and 57 define an angle α with the plane perpendicular to the longitudinal axis of the bollard, so that their respective opposite slopes create an effect of self-engagement between the bollard and the 'insulating. By way of example, the value of the angle α of the surface 57 of the lug is between 1 ° and 45 ° and preferably has a value of 15 °.

En se référant à la figure 7 on notera que les fenêtres 50a pratiquées dans les parois des bornes électriques de l'art antérieur peuvent évidemment comporter les plis 55 bien que ces parois soient simples.Referring to FIG. 7, it will be noted that the windows 50a made in the walls of the electrical terminals of the prior art can obviously have the folds 55 although these walls are simple.

Les figures 5 et 5A montrent un dispositif de consolidation de la borne 10. En effet, dans le but de compenser la diminution de l'épaisseur de la plaquette, le rabat 46 possède une largeur L sensiblement égale à la largeur interne définie par les parois de la borne une fois repliée de façon à ce que les arêtes latérales des rabats 46 viennent en appui sur la surface intérieure du fond et des demi-parois supérieures de la borne. En outre ces parois sont pourvues d'ouvertures 60 dans lesquelles s'engagent des tenons 61 pratiqués sur les extrémités des arêtes latérales des rabats 46.FIGS. 5 and 5A show a device for consolidating the terminal 10. In fact, in order to compensate for the decrease in the thickness of the wafer, the flap 46 has a width L substantially equal to the internal width defined by the walls of the bollard once folded so that the lateral edges of the flaps 46 come to bear on the inner surface of the bottom and of the upper half-walls of the bollard. In addition, these walls are provided with openings 60 into which engage pins 61 formed on the ends of the lateral edges of the flaps 46.

Outre le fait que les rabats 46 sont ainsi solidement fixés, cette consolidation de la cage formant la borne 10 permet aussi un entretoisement des parois de cette cage et permet d'éviter tout écrasement accidentel.In addition to the fact that the flaps 46 are thus securely fixed, this consolidation of the cage forming the terminal 10 also allows bracing of the walls of this cage and makes it possible to avoid any accidental crushing.

On notera que la fixation des rabats 46 dans la cage peut être réalisée par un seul tenon 61 prévu sur l'une ou l'autre des arêtes latérales du rabat 46.It will be noted that the fixing of the flaps 46 in the cage can be carried out by a single stud 61 provided on one or the other of the lateral edges of the flap 46.

Les figures 6 et 6A montrent une autre disposition apte à renforcer la rigidité mécanique de la borne en général.Figures 6 and 6A show another arrangement capable of strengthening the mechanical rigidity of the terminal in general.

En effet entre le corps avant 11 de la borne 10 et le fût à sertir 14 il existe une zone dite de transition 15 qui peut subir des déformations ou désalignements préjudiciables pour la mise en place des bornes dans les isolants.Indeed between the front body 11 of the terminal 10 and the barrel to be crimped 14 there is a so-called transition zone 15 which can undergo deformations or misalignments harmful for the establishment of the terminals in the insulators.

Sur ces figures, on voit que cette zone de transition est de dimension réduite. En effet les parois 26 du corps avant 11 sont prolongées par deux branches 71 et 72 en forme d'équerre qui définissent avec le fond 22 et la paroi 26 une ouverture 70 constituée ainsi de 4 cotés coopérant ensembles à la consolidation de cette zone partiellement évidée. On notera que l'ouverture 70 permet l'introduction de tout dispositif de blocage latéral secondaire de la borne dans un boîtier de connecteur. Il convient de même de noter qu'entre les deux équerres disposées chacune sur une paroi 26 est prévu un espace 73 permettant le positionnement de l'extrémité de tout fil à sertir dépassant légèrement les dimensions requises, évitant ainsi à ce fil de repousser la borne au delà des normes requises pour le bon positionnement de la borne dans son isolant.In these figures, it can be seen that this transition zone is of reduced size. Indeed the walls 26 of the front body 11 are extended by two branches 71 and 72 in the form of a square which define with the bottom 22 and the wall 26 an opening 70 thus constituted by 4 sides cooperating together in the consolidation of this partially hollowed out area. Note that the opening 70 allows the introduction of any secondary lateral locking device of the terminal in a connector housing. It should also be noted that between the two brackets each disposed on a wall 26 is provided a space 73 allowing the positioning of the end of any wire to be crimped slightly exceeding the dimensions required, thus preventing this wire from pushing back the terminal beyond the standards required for the correct positioning of the terminal in its insulator.

On donnera maintenant une description succincte d'un procédé possible de fabrication de bornes suivant l'invention, permettant d'obtenir les bornes en bandes d'alimentation d'une machine de sertissage automatique sur des fils.We will now give a brief description of a possible method of manufacturing terminals according to the invention, making it possible to obtain the terminals in supply strips of an automatic crimping machine on wires.

Dans le cas des bornes de l'invention destinées au domaine automobile, la fabrication s'effectue par découpage et formage (pliage) de feuillards d'alliage cuivreux ayant une épaisseur de 0,29 mm. A un premier poste de travail, le feuillard est découpé pour donner naissance à des plaquettes successives du genre montré en figure 2, raccordées entre elles par une bande de liaison 66. Les lignes de pliage, indiquées en traits mixtes sur la figure 2, peuvent être marquées à la presse. Les lames de contacts 29 sont mis en forme par cambrage et frappe et les rabats 46 sont formés. Comme le montre la figure 4, il est avantageux de donner à l'ensemble, constitué par les rabats et la partie terminale libre des lames de contact 29, une pente, par exemple d'environ 15°, qui facilite l'introduction du contact mâle.In the case of the terminals of the invention intended for the automotive field, the manufacture is carried out by cutting and forming (folding) of copper alloy strips having a thickness of 0.29 mm. At a first work station, the strip is cut to give rise to successive plates of the kind shown in FIG. 2, connected together by a connecting strip 66. The fold lines, indicated by dashed lines in FIG. 2, can be marked with the press. The contact blades 29 are shaped by bending and striking and the flaps 46 are formed. As shown in FIG. 4, it is advantageous to give the assembly, constituted by the flaps and the free end part of the contact blades 29, a slope, for example of about 15 °, which facilitates the introduction of the contact male.

Le pli à 180° entre les languettes et parois internes et externes et le pli à 90° vers l'intérieur séparant la partie de la languette interne appartenant au côté et celle appartenant aux plafonds sont formés; simultanément les tenons 61 pénètrent dans les fenêtres 60 et les parois formées viennent au contact des arêtes des rabats 46.The 180 ° fold between the internal and external tabs and walls and the 90 ° inward fold separating the part of the internal tab belonging to the side and that belonging to the ceilings are formed; simultaneously the pins 61 penetrate into the windows 60 and the walls formed come into contact with the edges of the flaps 46.

L'invention ne se limite pas aux modes particuliers de réalisation qui ont été représentés et décrits à titres d'exemples. Elle est susceptible de nombreuses variantes. Par exemple, il est possible de constituer une borne dont les faces ne sont pas exactement parallèles mais présentent une pente ; une échancrure permettant le passage de la lame mâle en biais, ce qui est requis pour certains modes de réalisation d'étanchéité, destinée à recevoir une languette d'étanchéité peut être ménagée à l'avant du plafond du contact. Il doit être entendu que la portée du présent brevet s'étend à de telles variantes ainsi plus généralement qu'à toutes autres restant dans le cadre des équivalences.The invention is not limited to the particular embodiments which have been shown and described by way of examples. It is susceptible to many variations. For example, it is possible to constitute a terminal whose faces are not exactly parallel but have a slope; a notch allowing the passage of the male blade at an angle, which is required for certain sealing embodiments, intended to receive a sealing tongue can be provided in front of the contact ceiling. It should be understood that the scope of this patent extends to such variants and more generally than to all others remaining within the framework of equivalences.

Claims (5)

Borne de contact électrique femelle obtenue à partir d'une plaquette unique de métal électriquement conducteur comportant une partie arrière permettant sa liaison avec un conducteur électrique et une partie avant en forme de cage constituée d'un fond, de deux demi-parois supérieures, de deux parois latérales munies de moyens de guidage d'un contact mâle lors de son insertion et de moyens de fixation de cette cage dans des boîtiers de connexion, ces moyens de fixation comportant entre autre une fenêtre (50) pratiquée dans chaque paroi latérale, un ergot (53) porté par un doigt prévu dans l'isolant du boîtier de connexion, caractérisée en ce qu'au moins une des arêtes de l'ouverture (50) présente une déformation définissant un épaulement (55) dont la surface d'appui est sensiblement supérieure à la surface d'appui de l'ergot (53).Female electrical contact terminal obtained from a single plate of electrically conductive metal comprising a rear part allowing its connection with an electric conductor and a cage-shaped front part consisting of a bottom, two upper half-walls, two side walls provided with means for guiding a male contact when it is inserted and with means for fixing this cage in connection boxes, these fixing means comprising inter alia a window (50) formed in each side wall, a lug (53) carried by a finger provided in the insulation of the connection box, characterized in that at least one of the edges of the opening (50) has a deformation defining a shoulder (55) whose bearing surface is substantially greater than the bearing surface of the lug (53). Borne de contact électrique femelle selon la revendication 1 caractérisée en ce que la déformation présente un pli (55) orienté vers l'intérieur de la borne.Female electrical contact terminal according to claim 1 characterized in that the deformation has a fold (55) oriented towards the inside of the terminal. Borne de contact électrique femelle selon les revendication 1 et 2 caractérisée en ce que la déformation présente un double pli orienté selon une première direction vers l'intérieur de la borne puis orienté à 180° de la première direction.Female electrical contact terminal according to claims 1 and 2 characterized in that the deformation has a double fold oriented in a first direction towards the inside of the terminal and then oriented 180 ° from the first direction. Borne de contact électrique femelle selon les revendications 1 à 3 caractérisée en ce que le plan de la surface d'appui (56) définit avec le plan perpendiculaire à l'axe longitudinal de la borne un angle α compris entre 1° et 45°.Female electrical contact terminal according to claims 1 to 3 characterized in that the plane of the bearing surface (56) defines with the perpendicular plane to the longitudinal axis of the terminal an angle α between 1 ° and 45 °. Borne de contact électrique femelle selon la revendication 4 caractérisée en ce que l'angle α a une valeur de 15°.Female electrical contact terminal according to claim 4 characterized in that the angle α has a value of 15 °.
EP97108783A 1996-06-03 1997-06-02 Electrical contact socket of a reinforced cage type Expired - Lifetime EP0812037B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9606785 1996-06-03
FR9606785A FR2749440B1 (en) 1996-06-03 1996-06-03 REINFORCED CAGE TYPE FEMALE ELECTRIC CONTACT TERMINAL

Publications (2)

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EP0812037A1 true EP0812037A1 (en) 1997-12-10
EP0812037B1 EP0812037B1 (en) 2002-01-30

Family

ID=9492636

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Application Number Title Priority Date Filing Date
EP97108783A Expired - Lifetime EP0812037B1 (en) 1996-06-03 1997-06-02 Electrical contact socket of a reinforced cage type

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US (1) US5836793A (en)
EP (1) EP0812037B1 (en)
JP (1) JPH10125380A (en)
KR (1) KR980006632A (en)
AT (1) ATE212754T1 (en)
BR (1) BR9703429A (en)
CA (1) CA2204292A1 (en)
DE (1) DE69710125T2 (en)
ES (1) ES2170299T3 (en)
FR (1) FR2749440B1 (en)

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FR3055747A1 (en) * 2016-09-06 2018-03-09 Aptiv Technologies Limited FEMALE ELECTRICAL CONTACT CAGE

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US6083024A (en) * 1997-04-25 2000-07-04 The Whitaker Corporation Electrical connector assembly with reduced wear and mating forces
JP4722707B2 (en) 2005-10-13 2011-07-13 日本圧着端子製造株式会社 Vertical mating female terminal and housing to which this is mounted
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JP6124537B2 (en) * 2012-09-03 2017-05-10 矢崎総業株式会社 Female terminal
JP6119524B2 (en) * 2013-09-20 2017-04-26 住友電装株式会社 Terminal fitting
FR3045964B1 (en) * 2015-12-17 2018-06-15 Aptiv Technologies Limited FEMALE CONTACT WITH LATERAL HOLDING BLADES FOR MALE CONTACT AND CONNECTING ASSEMBLY COMPRISING SUCH FEMALE AND MALE CONTACTS

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EP0310487A1 (en) * 1987-09-28 1989-04-05 Francelco, Societe Anonyme Cage-type electrical contact terminal
FR2627020A1 (en) * 1988-02-08 1989-08-11 Amp France Electrical contact intended to receive a complementary connection lead

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Publication number Publication date
ATE212754T1 (en) 2002-02-15
FR2749440A1 (en) 1997-12-05
EP0812037B1 (en) 2002-01-30
DE69710125D1 (en) 2002-03-14
DE69710125T2 (en) 2002-08-29
BR9703429A (en) 1998-07-07
KR980006632A (en) 1998-03-30
ES2170299T3 (en) 2002-08-01
JPH10125380A (en) 1998-05-15
US5836793A (en) 1998-11-17
FR2749440B1 (en) 1998-10-30
CA2204292A1 (en) 1997-12-03

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