EP1568109B1 - Electrical contact with elastic return and electrical connection element equipped with at least one such contact - Google Patents

Electrical contact with elastic return and electrical connection element equipped with at least one such contact Download PDF

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Publication number
EP1568109B1
EP1568109B1 EP03796154A EP03796154A EP1568109B1 EP 1568109 B1 EP1568109 B1 EP 1568109B1 EP 03796154 A EP03796154 A EP 03796154A EP 03796154 A EP03796154 A EP 03796154A EP 1568109 B1 EP1568109 B1 EP 1568109B1
Authority
EP
European Patent Office
Prior art keywords
electrical contact
blade
cut
contact
plug
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03796154A
Other languages
German (de)
French (fr)
Other versions
EP1568109A1 (en
Inventor
Joseph Crestin
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.)
Societe dExploitation des Procedes Marechal SEPM SA
Original Assignee
Societe dExploitation des Procedes Marechal SEPM SA
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Publication date
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Publication of EP1568109A1 publication Critical patent/EP1568109A1/en
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Publication of EP1568109B1 publication Critical patent/EP1568109B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/20—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for assembling or disassembling contact members with insulating base, case or sleeve
    • 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
    • H01R13/22—Contacts for co-operating by abutting
    • H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted
    • H01R13/2407—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means
    • H01R13/2421—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means using coil springs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/20—Coupling parts carrying sockets, clips or analogous contacts and secured only to wire or cable
    • 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
    • H01R13/15—Pins, blades or sockets having separate spring member for producing or increasing contact pressure
    • H01R13/187—Pins, blades or sockets having separate spring member for producing or increasing contact pressure with spring member in the socket
    • 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
    • H01R13/46—Bases; Cases
    • H01R13/502—Bases; Cases composed of different pieces
    • H01R13/512—Bases; Cases composed of different pieces assembled by screw or screws
    • 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
    • H01R13/58—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable
    • H01R13/59—Threaded ferrule or bolt operating in a direction parallel to the cable or wire
    • 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
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/622—Screw-ring or screw-casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2101/00—One pole

Definitions

  • the invention relates to an electrical contact with elastic return and an electrical connection element provided with at least one such contact.
  • the electrical contacts with elastic return including end pressure are well known.
  • they comprise a contact head which comes into elastic engagement with an antagonistic contact under the action of a helical spring which surrounds a deformable conductor such as a braid, connected to a cable, possibly via a terminal or connection terminal.
  • the elastic movement can not be effected in the general longitudinal axis of the driver.
  • the inventor has sought and found a means for making a simple electrical contact elastic return allowing in particular an end pressure connection for various applications which will be discussed below.
  • the invention notably makes it possible to reduce the bulk of the contact and to eliminate or reduce certain electrical resistances.
  • the invention proposes an electrical contact with elastic return which is particularly remarkable in that it comprises at least one flexible blade constituted by a portion of the front surface of a conductive part provided with at least one notch which is formed in a solid part of said conductive part and at the end thereof, the blade can thus work in bending under the action of the pressure exerted by an antagonistic contact.
  • the conductive part is cyündrique and the flexible blade is shaped segment or circular or elliptical zone and in this case, for a contact having a single blade and a single notch, the depth thereof is greater to the radius of the cylindrical piece.
  • the notch of the conductive part is formed in a plane perpendicular to the longitudinal axis of said piece.
  • the thickness of the notch is at most equal to the maximum deflection that is admitted by the flexible blade before it reaches its elastic limit and which is a function of the nature of the materials used and the depth of the notch, such so that the blade can not exceed this limit.
  • a compression spring is arranged behind the blade by bearing in the bottom of a housing provided for this purpose in the conductive part to contribute to the return of the blade in the initial position.
  • the flexible blade is further provided on at least a portion of its surface with a silver pellet designed to improve the passage of electrical current between said contact and the electrical contact antagonist.
  • a contact according to the invention is intended to equip many devices that are also part of the invention, such as for example a unipolar electrical connection element in the form of a socket outlet or a mobile socket, provided with an electrical contact according to the invention comprising at least one flexible blade, which is intended to establish an electrical connection with an antagonistic electrical contact in the form of a pin of a plug or of a connector socket to be coupled, said pin coming to exert pressure on the blade in a direction parallel to the axis of the conductive part.
  • the conductive part of the electrical contact of the connection element is provided with a thread which terminates in the vicinity of its notch and which is intended to cooperate with a screw ring arranged on the plug or the base connector for securing this or the latter with said connecting element in the coupling position.
  • a unipolar extension consisting of a mobile socket 1 and a plug 2 (FIGS. 1 to 5).
  • the plug 2 is intended to mate with the mobile socket 1 to take the connection position shown in section in Figure 5.
  • the plug 2 comprises an insulating casing 3 in which is arranged a contact pin 4 (FIGS. 2, 4, 5, 6 and 7) integral with a metallic cylindrical piece 5, itself connected by screwing, crimping or the like, to a cable 6.
  • the part 5 is for example maintained in the housing 3 by a pin 7 ( Figures 4 and 5).
  • the pin 4 is eccentric, but it could be less or not at all depending on its nature and / or the arrangement of the contact of the mobile socket which will be discussed below.
  • the cable 6 is furthermore held here by a cable gland 8 while a clamping ring 9 is provided for actuating, by rotating it, a partially tapped screw ring 10 which will be discussed below and which is intended to to lock the coupling of the plug 2 and the mobile socket 1, the screw ring 10 being advantageously metallic and the ring 9 of insulating material.
  • the mobile socket 1 comprises in a manner similar to the plug 2 an insulating housing 11 in which is arranged a contact in the form of a flexible blade 12 integral with a metal part 13, here cylindrical, which is connected by screwing, crimping or other , to a cable 14.
  • the part 13 is for example maintained in the housing 11 by a pin 15.
  • the cables 6 and 14 are connected to the corresponding metal parts, respectively 5 and 13, by screwing, but another known and advantageous embodiment consists in crimping them by means of tubes, which makes it easy to obtain several calibres with the same parts.
  • the cable 14 is furthermore held here by a cable gland 16 while the part 13 is provided at its end with a thread 17 intended to cooperate with the screw ring 10 of the plug.
  • the end of the metal part 13 of the mobile socket 1 is protected at its front end by an insulator 18 fixed on said part 13, for example by a central screw 19 (FIGS. 1 and 3), and locked in rotation by an eccentric pin 20 (Figure 3).
  • a circular aperture 21 ( Figures 1 and 3) which is in this example eccentric and which is intended for the passage of the pin 4 of the plug so that the end of said pin can come to apply on the blade 12 of the mobile socket which will be discussed in more detail below.
  • the screw ring 10 is here represented engaged with the thread 17 of the metal part 13 of the mobile socket 1.
  • the contact of the mobile socket is constituted in this example by a flexible blade 12 in the form of a circular segment constituted by a part of the front surface of the cylindrical metal part 13 which is provided with a notch 22 formed at its end, in this example in a plane perpendicular to the longitudinal axis of said part 13.
  • the notch 22 is formed in a solid part of the part 13.
  • the depth of the notch 22 is here greater than the radius of the cylindrical part 13 while the zone of contact of the pin on the blade 12 is remote from the bottom of the notch 22.
  • the thickness of the notch 22 is preferably chosen to be at most equal to the maximum deflection that is admitted by the blade before it reaches its elastic limit, the blade in these conditions can not of course not exceed this limit since in maximum flexion it would come into contact with the solid part of the part 13.
  • a compression spring 23 is arranged in a housing 24 of the part 13 in which it bears, to urge the blade 12 so as to contribute if necessary to the return to position of the blade 12.
  • the blade 12 can obviously return to a neutral initial position in which it is blocked by the insulator 18 of the mobile socket, but said insulator can be arranged to allow a possible bending of the blade to the outside in order to increase the amplitude of deflection in bending of said blade.
  • connection element that is compact and inexpensive while the all-metal design of a single block of the part 13 with the blade 12 makes it possible to ensure a low resistance to the passage of the current and a good reliability of connection.
  • the pin 4 of the plug could have another shape, circular or otherwise, and the blade 12 could be shifted in the connection element to mate with a pin of a plug disposed centrally or the contact could comprise several blades formed of several circular segments or others with notches perpendicular or not to the axis of the conductive part.
  • the extender also has a great advantage against the risk of disconnection by inadvertent traction on the cables, which could be possibly the case previously when the cable element was directly requested by a spring.
  • the invention relates in fact to an electrical contact with a particular elastic return, as well as the connection elements equipped with at least one such contact.
  • a mobile socket intended to constitute an extension cooperating with a plug
  • it could of course be a mobile socket intended to form a connector cooperating with a connector base, or it could still be base of a socket for cooperating with a plug.

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

Description

L'invention concerne un contact électrique à rappel élastique et un élément de connexion électrique muni d'au moins un tel contact.The invention relates to an electrical contact with elastic return and an electrical connection element provided with at least one such contact.

Les contacts électriques à rappel élastique notamment à pression en bout sont bien connus.The electrical contacts with elastic return including end pressure are well known.

Selon un mode de réalisation, ils comportent une tête de contact qui vient en prise élastique avec un contact antagoniste sous l'action d'un ressort hélicoïdal qui entoure un conducteur déformable telle une tresse, connecté à un câble, éventuellement par l'intermédiaire d'une borne ou cosse de raccordement.According to one embodiment, they comprise a contact head which comes into elastic engagement with an antagonistic contact under the action of a helical spring which surrounds a deformable conductor such as a braid, connected to a cable, possibly via a terminal or connection terminal.

Outre les problèmes inhérents aux déformations répétées du conducteur déformable, ces contacts connus présentent une longueur importante et créent des résistances supplémentaires dues aux zones de sertissage des différentes pièces.In addition to the problems inherent in repeated deformations of the deformable conductor, these known contacts have a significant length and create additional strengths due to the crimping zones of the different parts.

Pour certaines applications on a aussi imaginé de maintenir une tête de contact fixe à l'extrémité d'un câble au moyen d'une lame formant ressort comme par exemple dans le document EP-0 643 444 au nom du même demandeur.For some applications it has also been conceived to maintain a fixed contact head at the end of a cable by means of a leaf spring such as for example in the document EP-0 643 444 in the name of the same applicant.

Toutefois dans ce cas, le mouvement élastique ne peut pas s'effectuer dans l'axe longitudinal général du conducteur.However, in this case, the elastic movement can not be effected in the general longitudinal axis of the driver.

On a aussi imaginé comme décrit dans le document DE-88 06 966 U une tige de contact cylindrique creuse formée par enroulement d'une plaquette et pourvue de fentes radiales.It has also been imagined, as described in DE-88 06 966 U, a hollow cylindrical contact rod formed by winding a wafer and provided with radial slots.

L'inventeur a cherché et trouvé un moyen pour réaliser un contact électrique simple à rappel élastique permettant notamment une connexion à pression en bout pour diverses applications dont il sera question ci-après. De plus, l'invention permet notamment de réduire l'encombrement du contact et d'éliminer ou réduire certaines résistances électriques.The inventor has sought and found a means for making a simple electrical contact elastic return allowing in particular an end pressure connection for various applications which will be discussed below. In addition, the invention notably makes it possible to reduce the bulk of the contact and to eliminate or reduce certain electrical resistances.

A cet effet, l'invention propose un contact électrique à rappel élastique qui est notamment remarquable en ce qu'il comporte au moins une lame flexible constituée par une partie de la surface frontale d'une pièce conductrice munie d'au moins une entaille qui est ménagée dans une partie pleine de ladite pièce conductrice et à l'extrémité de celle-ci, la lame pouvant ainsi travailler en flexion sous l'action de la pression exercée par un contact antagoniste.For this purpose, the invention proposes an electrical contact with elastic return which is particularly remarkable in that it comprises at least one flexible blade constituted by a portion of the front surface of a conductive part provided with at least one notch which is formed in a solid part of said conductive part and at the end thereof, the blade can thus work in bending under the action of the pressure exerted by an antagonistic contact.

Selon un mode de réaüsation, la pièce conductrice est cyündrique et la lame flexible est en forme de segment ou zone circulaire ou elliptique et dans ce cas, pour un contact comportant une seule lame et une seule entaille, la profondeur de celle-ci est supérieure au rayon de la pièce cylindrique. Par exemple, mais sans être obligatoire, l'entaille de la pièce conductrice est ménagée selon un plan perpendiculaire à l'axe longitudinal de ladite pièce. De préférence, l'épaisseur de l'entaille est au plus égale à la flèche maximale qui est admise par la lame flexible avant que celle-ci n'atteigne sa limite élastique et qui est fonction de la nature des matériaux utilisés et de la profondeur de l'entaille, de telle sorte que la lame ne peut pas dépasser cette limite.According to a réaüsation mode, the conductive part is cyündrique and the flexible blade is shaped segment or circular or elliptical zone and in this case, for a contact having a single blade and a single notch, the depth thereof is greater to the radius of the cylindrical piece. For example, but without being mandatory, the notch of the conductive part is formed in a plane perpendicular to the longitudinal axis of said piece. Preferably, the thickness of the notch is at most equal to the maximum deflection that is admitted by the flexible blade before it reaches its elastic limit and which is a function of the nature of the materials used and the depth of the notch, such so that the blade can not exceed this limit.

Selon un mode de réalisation, un ressort de compression est aménagé derrière la lame en prenant appui dans le fond d'un logement ménagé à cet effet dans la pièce conductrice afin de contribuer au retour de la lame en position initiale.According to one embodiment, a compression spring is arranged behind the blade by bearing in the bottom of a housing provided for this purpose in the conductive part to contribute to the return of the blade in the initial position.

De préférence, la lame flexible est en outre pourvue sur au moins une partie de sa surface d'une pastille d'argent destinée à améliorer le passage du courant électrique entre ledit contact et le contact électrique antagoniste.Preferably, the flexible blade is further provided on at least a portion of its surface with a silver pellet designed to improve the passage of electrical current between said contact and the electrical contact antagonist.

Un contact selon l'invention est destiné à équiper de nombreux appareils qui font également partie de l'invention, comme par exemple un élément de connexion électrique unipolaire sous la forme d'un socle de prise de courant ou d'une prise mobile, muni d'un contact électrique selon l'invention comportant au moins une lame flexible, lequel est destiné à établir une connexion électrique avec un contact électrique antagoniste sous forme d'une broche d'une fiche ou d'un socle de connecteur à accoupler, ladite broche venant exercer une pression sur la lame selon une direction parallèle à l'axe de la pièce conductrice.A contact according to the invention is intended to equip many devices that are also part of the invention, such as for example a unipolar electrical connection element in the form of a socket outlet or a mobile socket, provided with an electrical contact according to the invention comprising at least one flexible blade, which is intended to establish an electrical connection with an antagonistic electrical contact in the form of a pin of a plug or of a connector socket to be coupled, said pin coming to exert pressure on the blade in a direction parallel to the axis of the conductive part.

Dans ce cas par exemple, la pièce conductrice du contact électrique de l'élément de connexion est munie d'un filetage qui se termine au voisinage de son entaille et qui est destiné à coopérer avec un anneau de vissage aménagé sur la fiche ou le socle de connecteur afin d'assurer une fixation de cette ou ce dernier avec ledit élément de connexion en position d'accouplement.In this case for example, the conductive part of the electrical contact of the connection element is provided with a thread which terminates in the vicinity of its notch and which is intended to cooperate with a screw ring arranged on the plug or the base connector for securing this or the latter with said connecting element in the coupling position.

L'invention sera bien comprise et d'autres particularités apparaîtront à la lecture de la description qui va suivre et qui se réfère aux dessins annexés dans lesquels :

  • les figures 1 et 2 sont des vues en perspective d'une prise mobile selon l'invention et respectivement d'une fiche destinée à s'accoupler à la prise mobile de manière à constituer un prolongateur,
  • les figures 3 et 4 sont des coupes axiales de la prise mobile et respectivement de la fiche des figures 1 et 2,
  • la figure 5 est une coupe axiale montrant la prise mobile et la fiche des figures 1 à 4 connectées entre elles pour former un prolongateur,
  • les figures 6 et 7 représentent un détail de l'intérieur du prolongateur de la figure 5, seul l'anneau de vissage étant représenté en coupe et l'isolant frontal de la prise mobile étant retiré pour plus de clarté.
The invention will be well understood and other features will appear on reading the description which follows and which refers to the appended drawings in which:
  • FIGS. 1 and 2 are perspective views of a mobile socket according to the invention and respectively of a plug intended to mate with the mobile socket so as to constitute an extension,
  • FIGS. 3 and 4 are axial sections of the movable plug and respectively of the plug of FIGS. 1 and 2,
  • FIG. 5 is an axial section showing the movable plug and the plug of FIGS. 1 to 4 connected together to form an extension,
  • Figures 6 and 7 show a detail of the interior of the extender of Figure 5, only the screw ring being shown in section and the front insulation of the movable socket being removed for clarity.

Sur les dessins, on peut voir à titre d'exemple un prolongateur unipolaire formé d'une prise mobile 1 et d'une fiche 2 (figures 1 à 5).In the drawings, there can be seen, by way of example, a unipolar extension consisting of a mobile socket 1 and a plug 2 (FIGS. 1 to 5).

La fiche 2 est destinée à venir s'accoupler avec la prise mobile 1 pour prendre la position de connexion représentée en coupe sur la figure 5.The plug 2 is intended to mate with the mobile socket 1 to take the connection position shown in section in Figure 5.

La fiche 2 comporte un carter isolant 3 dans lequel est aménagée une broche de contact 4 (figures 2, 4, 5, 6 et 7) solidaire d'une pièce cylindrique métallique 5, elle-même raccordée par vissage, sertissage ou autre, à un câble 6. La pièce 5 est par exemple maintenue dans le carter 3 par une goupille 7 (figures 4 et 5).The plug 2 comprises an insulating casing 3 in which is arranged a contact pin 4 (FIGS. 2, 4, 5, 6 and 7) integral with a metallic cylindrical piece 5, itself connected by screwing, crimping or the like, to a cable 6. The part 5 is for example maintained in the housing 3 by a pin 7 (Figures 4 and 5).

Dans le mode de réalisation représenté, la broche 4 est excentrée, mais elle pourrait l'être moins ou pas du tout selon sa nature et/ou la disposition du contact de la prise mobile dont il sera question ci-après.In the embodiment shown, the pin 4 is eccentric, but it could be less or not at all depending on its nature and / or the arrangement of the contact of the mobile socket which will be discussed below.

Le câble 6 est en outre maintenu ici par un serre câble 8 tandis qu'une bague de serrage 9 est prévue pour actionner en l'entraînant en rotation un anneau de vissage 10 en partie taraudé dont il sera question ci-après et qui est destiné à verrouiller l'accouplement de la fiche 2 et de la prise mobile 1, l'anneau de vissage 10 étant avantageusement métallique et la bague 9 en matière isolante.The cable 6 is furthermore held here by a cable gland 8 while a clamping ring 9 is provided for actuating, by rotating it, a partially tapped screw ring 10 which will be discussed below and which is intended to to lock the coupling of the plug 2 and the mobile socket 1, the screw ring 10 being advantageously metallic and the ring 9 of insulating material.

La prise mobile 1 comporte de manière semblable à la fiche 2 un carter isolant 11 dans lequel est aménagé un contact sous forme d'une lame flexible 12 solidaire d'une pièce métallique 13, ici cylindrique, qui est raccordée par vissage, sertissage ou autre, à un câble 14. La pièce 13 est par exemple maintenue dans le carter 11 par une goupille 15.The mobile socket 1 comprises in a manner similar to the plug 2 an insulating housing 11 in which is arranged a contact in the form of a flexible blade 12 integral with a metal part 13, here cylindrical, which is connected by screwing, crimping or other , to a cable 14. The part 13 is for example maintained in the housing 11 by a pin 15.

Dans l'exemple représenté, les câbles 6 et 14 sont raccordés aux pièces métalliques correspondantes, respectivement 5 et 13, par vissage mais un autre mode de réalisation connu et avantageux consiste à les sertir au moyen de tubes, ce qui permet d'obtenir aisément plusieurs calibres avec les mêmes pièces.In the example shown, the cables 6 and 14 are connected to the corresponding metal parts, respectively 5 and 13, by screwing, but another known and advantageous embodiment consists in crimping them by means of tubes, which makes it easy to obtain several calibres with the same parts.

Le câble 14 est en outre maintenu ici par un serre câble 16 tandis que la pièce 13 est pourvue à son extrémité d'un filetage 17 destiné à coopérer avec l'anneau de vissage 10 de la fiche.The cable 14 is furthermore held here by a cable gland 16 while the part 13 is provided at its end with a thread 17 intended to cooperate with the screw ring 10 of the plug.

Comme le montrent bien les figures, l'extrémité de la pièce métallique 13 de la prise mobile 1 est protégée à son extrémité frontale par un isolant 18 fixé sur ladite pièce 13, par exemple par une vis centrale 19 (figures 1 et 3), et bloqué en rotation par une goupille excentrée 20 (figure 3).As the figures clearly show, the end of the metal part 13 of the mobile socket 1 is protected at its front end by an insulator 18 fixed on said part 13, for example by a central screw 19 (FIGS. 1 and 3), and locked in rotation by an eccentric pin 20 (Figure 3).

Dans l'isolant 18, est prévu un ajour circulaire 21 (figures 1 et 3) qui est dans cet exemple excentré et qui est destiné au passage de la broche 4 de la fiche afin que l'extrémité de ladite broche puisse venir s'appliquer sur la lame 12 de la prise mobile dont il sera question plus en détail ci-après. Pour l'accouplement de la fiche et de la prise mobile, il suffit de faire pénétrer la broche 4 de la fiche dans l'ajour 21 de la prise et de visser l'anneau 10 de la fiche sur le filetage 17 de la pièce 13 en faisant tourner la bague 9 de ladite fiche. On obtient ici ainsi une résistance mécanique de l'accouplement importante du fait du vissage de l'anneau de vissage métallique 10 sur la pièce 13 également métallique.In the insulator 18 is provided a circular aperture 21 (Figures 1 and 3) which is in this example eccentric and which is intended for the passage of the pin 4 of the plug so that the end of said pin can come to apply on the blade 12 of the mobile socket which will be discussed in more detail below. For the coupling of the plug and the mobile socket, it suffices to penetrate the pin 4 of the plug into the opening 21 of the socket and to screw the ring 10 of the plug on the thread 17 of the piece 13 by rotating the ring 9 of said plug. This gives a high mechanical strength of the coupling because of the screwing of the metal screw ring 10 on the piece 13 also metallic.

Sur les figures 6 et 7, on peut voir plus en détail la pièce métallique 5 de la fiche munie de sa broche 4 et de son anneau taraudé de vissage 10.In Figures 6 and 7, we can see in more detail the metal part 5 of the plug with its pin 4 and its threaded screw ring 10.

L'anneau de vissage 10 est ici représenté en prise avec le filetage 17 de la pièce métallique 13 de la prise mobile 1.The screw ring 10 is here represented engaged with the thread 17 of the metal part 13 of the mobile socket 1.

Comme déjà dit, pour plus de clarté sur les figures 6 et 7 qui représentent en partie la prise mobile 1 et la fiche 2 des figures précédentes sans leurs carters, on a aussi retiré l'isolant 18 de la prise mobile.As already stated, for clarity in Figures 6 and 7 which partly represent the mobile socket 1 and the plug 2 of the previous figures without their housings, it was also removed the insulator 18 of the mobile socket.

En effet ces figures sont plus particulièrement destinées à montrer le contact de la prise mobile sous forme d'une lame flexible 12.Indeed, these figures are more particularly intended to show the contact of the mobile socket in the form of a flexible blade 12.

Comme le montrent lesdites figures 6 et 7, le contact de la prise mobile est constitué dans cet exemple par une lame flexible 12 en forme de segment circulaire constitué par une partie de la surface frontale de la pièce cylindrique métallique 13 qui est munie d'une entaille 22 ménagée à son extrémité, dans cet exemple selon un plan perpendiculaire à l'axe longitudinal de ladite pièce 13. L'entaille 22 est ménagée dans une partie pleine de la pièce 13.As shown in FIGS. 6 and 7, the contact of the mobile socket is constituted in this example by a flexible blade 12 in the form of a circular segment constituted by a part of the front surface of the cylindrical metal part 13 which is provided with a notch 22 formed at its end, in this example in a plane perpendicular to the longitudinal axis of said part 13. The notch 22 is formed in a solid part of the part 13.

On comprend alors que le contact de la prise mobile sous la forme de la lame flexible 12 peut ainsi travailler en flexion sous l'action de la pression exercée par la broche de contact 4 de la fiche 2 selon un direction parallèle à l'axe de la pièce 13. Sur les figures 6 et 7, la lame 12 n'a pas encore ou peu subi de flexion.It is then understood that the contact of the movable plug in the form of the flexible blade 12 can thus work in flexion under the action of the pressure exerted by the contact pin 4 of the plug 2 in a direction parallel to the axis of 13. In Figures 6 and 7, the blade 12 has not yet undergone flexion.

Comme le montre en particulier la figure 6, la profondeur de l'entaille 22 est ici supérieure au rayon de la pièce cylindrique 13 tandis que la zone de contact de la broche sur la lame 12 est éloignée du fond de l'entaille 22.As shown in particular in FIG. 6, the depth of the notch 22 is here greater than the radius of the cylindrical part 13 while the zone of contact of the pin on the blade 12 is remote from the bottom of the notch 22.

En outre, on comprend que l'épaisseur de l'entaille 22 est de préférence choisie de manière à être au plus égale à la flèche maximale qui est admise par la lame avant que celle-ci n'atteigne sa limite élastique, la lame dans ces conditions ne pouvant bien entendu pas dépasser cette limite puisqu'en flexion maximale elle viendrait au contact de la partie pleine de la pièce 13.In addition, it is understood that the thickness of the notch 22 is preferably chosen to be at most equal to the maximum deflection that is admitted by the blade before it reaches its elastic limit, the blade in these conditions can not of course not exceed this limit since in maximum flexion it would come into contact with the solid part of the part 13.

De plus, ici un ressort de compression 23 est aménagé dans un logement 24 de la pièce 13 dans lequel il prend appui, pour solliciter la lame 12 de manière à contribuer si nécessaire au retour en position de la lame 12.In addition, here a compression spring 23 is arranged in a housing 24 of the part 13 in which it bears, to urge the blade 12 so as to contribute if necessary to the return to position of the blade 12.

Du fait dudit ressort 23, la lame 12 peut évidemment revenir à une position initiale neutre dans laquelle elle est bloquée par l'isolant 18 de la prise mobile, mais ledit isolant peut être disposé de manière à permettre une flexion possible de la lame vers l'extérieur afin d'augmenter l'amplitude de débattement en flexion de ladite lame.Due to said spring 23, the blade 12 can obviously return to a neutral initial position in which it is blocked by the insulator 18 of the mobile socket, but said insulator can be arranged to allow a possible bending of the blade to the outside in order to increase the amplitude of deflection in bending of said blade.

Un tel contact permet de réaliser un élément de connexion peu encombrant et peu onéreux tandis que la conception tout métal d'un seul bloc de la pièce 13 avec la lame 12 permet d'assurer une faible résistance au passage du courant et une bonne fiabilité de connexion.Such contact makes it possible to produce a connection element that is compact and inexpensive while the all-metal design of a single block of the part 13 with the blade 12 makes it possible to ensure a low resistance to the passage of the current and a good reliability of connection.

D'autres moyens non décrits plus spécialement sont en outre prévus comme des joints toriques pour la fiche, ou encore et avantageusement des pastilles d'argent qui sont aménagées à l'extrémité de la broche 4 comme représenté en 25 sur la figure 2, et/ou dans la zone de la lame 12 où ladite broche 4 vient s'appliquer comme représenté en 26 sur les figures 3, 6 et 7.Other non-specifically described means are further provided as O-rings for the plug, or alternatively and advantageously silver pads which are provided at the end of the pin 4 as shown at 25 in Fig. 2, and / or in the region of the blade 12 where said pin 4 is applied as shown at 26 in Figures 3, 6 and 7.

Toutefois, comme déjà dit, la broche 4 de la fiche pourrait présenter une autre forme, circulaire ou autre, et la lame 12 pourrait être décalée dans l'élément de connexion pour s'accoupler avec une broche d'une fiche disposée centralement ou encore le contact pourrait comporter plusieurs lames formées de plusieurs segments circulaires ou autres avec des entailles perpendiculaires ou non à l'axe de la pièce conductrice.However, as already said, the pin 4 of the plug could have another shape, circular or otherwise, and the blade 12 could be shifted in the connection element to mate with a pin of a plug disposed centrally or the contact could comprise several blades formed of several circular segments or others with notches perpendicular or not to the axis of the conductive part.

Grâce au contact décrit et aux moyens utilisés pour la fixation de l'accouplement, le prolongateur présente en plus un gros avantage contre les risques de déconnexion par traction intempestive sur les câbles, ce qui pouvait être éventuellement le cas antérieurement lorsque l'élément câblé était directement sollicité par un ressort.Thanks to the described contact and to the means used for fastening the coupling, the extender also has a great advantage against the risk of disconnection by inadvertent traction on the cables, which could be possibly the case previously when the cable element was directly requested by a spring.

Le mode de réalisation décrit est évidemment donné à titre d'exemple comme application possible.The described embodiment is obviously given as an example as a possible application.

L'invention concerne en effet un contact électrique à rappel élastique particulier, ainsi que les éléments de connexion équipés d'au moins un tel contact.The invention relates in fact to an electrical contact with a particular elastic return, as well as the connection elements equipped with at least one such contact.

Au lieu d'une prise mobile destinée à constituer un prolongateur en coopérant avec une fiche, il pourrait bien sûr s'agir d'une prise mobile destinée à constituer un connecteur en coopérant avec un socle de connecteur, ou il pourrait encore s'agir du socle d'une prise de courant destiné à coopérer avec une fiche.Instead of a mobile socket intended to constitute an extension cooperating with a plug, it could of course be a mobile socket intended to form a connector cooperating with a connector base, or it could still be base of a socket for cooperating with a plug.

En outre, si l'invention est particulièrement bien adaptée à un dispositif de connexion unipolaire, ceci n'est pas exclusif.In addition, if the invention is particularly well suited to a unipolar connection device, this is not exclusive.

Claims (9)

  1. An electrical contact with elastic return, characterized in that it comprises at least one flexible blade (12) constituted by a portion of the front surface of a conductive part (13) that is provided with at least one cut (22) formed in a solid portion of said conductive port (13) and at its end, the blade thus being capable of flexing under the action of the pressure exerted by an opposing electrical contact (4).
  2. An electrical contact according to claim 1, characterized in that the conductive part (13) is cylindrical, and the flexible blade (12) is in the form of a circular or elliptical segment or zone.
  3. An electrical contact according to claim 2, having a single blade (12) and a single cut (22), characterized in that the depth of said cut (22) is greater than the radius of the cylindrical part (13).
  4. An electrical contact according to any one of claims 1 to 3, characterized in that the cut (22) of the conductive part (13) lies in a plane perpendicular to the longitudinal axis of said part (13).
  5. An electrical contact according to any one of claims 1 to 4, characterized in that the width of the cut (22) is no greater than the maximum acceptable deflection for the flexible blade (12) prior to it reaching its elastic limit, which maximum deflection is a function of the nature of the materials used and the depth of the cut, so that the blade cannot exceed its elastic limit.
  6. An electrical contact according to any one of claims 1 to 5, characterized in that a compression spring (23) is arranged behind the blade (12) bearing against the end of a housing (24) provided for this purpose in the conductive part (13) so as to contribute to returning the blade (12) into an initial position.
  7. An electrical contact according to any one of claims 1 to 6, characterized in that the flexible blade (12) is also provided over at least a portion of its surface with a pellet of silver (26) for improving the passage of electric current between said contact and the opposing electrical contact (4).
  8. A single-pole electrical connection element in the form of a socket-outlet or a connector (1), provided with an electrical contact including at least one flexible blade (12) according to any one of claims 1 to 6 and designed to establish an electrical connection with an opposing electrical contact in the form of a pin (4) of a plug (2) or of an appliance inlet to be coupled thereto, said pin (4) exerting pressure on the blade (12) in a direction parallel to the axis of the conductive part (13).
  9. An electrical connection element according to claim 8, characterized in that the conductor part (13) of the electrical contact is provided with a thread (17) which terminates in the vicinity of its cut (22) and which is designed to co-operate with a screw ring (10) formed on the plug (2) or the appliance inlet in order to secure it to said connection element in the coupling position.
EP03796154A 2002-12-06 2003-12-04 Electrical contact with elastic return and electrical connection element equipped with at least one such contact Expired - Lifetime EP1568109B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0215435A FR2848347B1 (en) 2002-12-06 2002-12-06 ELASTIC RECALL ELECTRICAL CONTACT AND ELECTRICAL CONNECTING ELEMENT PROVIDED WITH AT LEAST ONE SUCH CONTACT
FR0215435 2002-12-06
PCT/FR2003/003582 WO2004054038A1 (en) 2002-12-06 2003-12-04 Electrical contact with elastic return and electrical connection element equipped with same

Publications (2)

Publication Number Publication Date
EP1568109A1 EP1568109A1 (en) 2005-08-31
EP1568109B1 true EP1568109B1 (en) 2006-10-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP03796154A Expired - Lifetime EP1568109B1 (en) 2002-12-06 2003-12-04 Electrical contact with elastic return and electrical connection element equipped with at least one such contact

Country Status (7)

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US (1) US7182614B2 (en)
EP (1) EP1568109B1 (en)
AU (1) AU2003298407B2 (en)
DE (1) DE60308894T2 (en)
ES (1) ES2273082T3 (en)
FR (1) FR2848347B1 (en)
WO (1) WO2004054038A1 (en)

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Also Published As

Publication number Publication date
FR2848347A1 (en) 2004-06-11
US20050130475A1 (en) 2005-06-16
AU2003298407A1 (en) 2004-06-30
AU2003298407B2 (en) 2008-11-20
FR2848347B1 (en) 2005-01-07
ES2273082T3 (en) 2007-05-01
US7182614B2 (en) 2007-02-27
WO2004054038A1 (en) 2004-06-24
DE60308894D1 (en) 2006-11-16
EP1568109A1 (en) 2005-08-31
DE60308894T2 (en) 2007-03-08

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