EP1251601B1 - Electromagnetic shielding device for electrical connector - Google Patents

Electromagnetic shielding device for electrical connector Download PDF

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Publication number
EP1251601B1
EP1251601B1 EP20020290916 EP02290916A EP1251601B1 EP 1251601 B1 EP1251601 B1 EP 1251601B1 EP 20020290916 EP20020290916 EP 20020290916 EP 02290916 A EP02290916 A EP 02290916A EP 1251601 B1 EP1251601 B1 EP 1251601B1
Authority
EP
European Patent Office
Prior art keywords
shielding device
connector
opening
movable element
cable
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
EP20020290916
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German (de)
French (fr)
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EP1251601A1 (en
Inventor
Jacques Nozick
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.)
INFRA and
Infra SA
Original Assignee
INFRA and
Infra SA
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Publication date
Application filed by INFRA and, Infra SA filed Critical INFRA and
Publication of EP1251601A1 publication Critical patent/EP1251601A1/en
Application granted granted Critical
Publication of EP1251601B1 publication Critical patent/EP1251601B1/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
    • H01R13/58—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
    • H01R13/5804—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 comprising a separate cable clamping part
    • H01R13/5812—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 comprising a separate cable clamping part the cable clamping being achieved by mounting the separate part on the housing of the coupling device
    • 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
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
    • H01R13/6598—Shield material
    • H01R13/6599—Dielectric material made conductive, e.g. plastic material coated with metal

Definitions

  • the present invention relates to an electromagnetic shielding device for mounting on an electrical connector to which is connected a power cable on one of its sides.
  • the shielding device is adapted to be mounted on the connector on the side where the power cable is connected.
  • an electrical connector comprises a housing having a front face for receiving another connector of the opposite kind and a rear face for connecting a power cable.
  • it is customary to shield the body of the electrical connector by metallizing it or by making it out of metal.
  • its front and rear face remain open and accessible to connect the power cable and plug an opposite kind of electrical connector.
  • the document EP 0 342 828 describes a device according to the preamble of claim 1.
  • the present invention will apply more particularly to the shield on the side where the power cable is connected. Indeed, it is also necessary to electromagnetically shield the open side where the power cable is connected.
  • metal or metallized caps that are adapted to the rear face of the electrical connector. These metal or metallized caps incorporate complex devices of clamps, sleeves or guillotines to achieve the grounding of the screen of the cable to thereby obtain electrical continuity.
  • the present invention aims to simplify these devices of the prior art by defining a cap or electromagnetic shielding device of simple design and use while providing a perfect 360 ° shielding all around the cable and putting the screen of the cable to the ground.
  • the present invention provides an electromagnetic shielding device for mounting on an electrical connector having a power cable connected to one side of the connector, said shielding device being adapted to be mounted on the connector of the connector. side where extends the power cable, said shielding device being provided with an opening defining a passage for the power cable connected to the connector, said shielding device comprising an electrically conductive body intended to be mounted on the connector and a electrically conductive member movable relative to the body and adapted to reduce the displacement of the section of the opening relative to the body to thereby reduce the passage for the power cable.
  • the movable member adapts the section of the opening to the size (thickness or diameter) of the cable used to minimize the space around the cable.
  • the displacement of the movable member makes it possible to come into pressed contact with the cable, or more particularly with the shielding screen of the cable. This provides a good electrical contact between the shielding device and the cable screen.
  • the movable element is translatable relative to the body to reduce the section of the opening.
  • the movable element defines a part of the edge of the opening.
  • the movable member is unidirectionally steerable in the direction of reducing the section of the opening.
  • the movable element cooperates with the body so as to define several positions defining different opening sections.
  • the movable member slides in the body with a one-way detent system with locking catches. The movable element is thus slidably mounted on the body of the device and it is sufficient for the operator to push the movable element towards the connecting cable, the final position being reached when it is no longer possible to snap a notch additional.
  • the movable element comprises an elastically deformable flexible appendage defining a part of the edge of the opening.
  • the opening is bordered by a flange which projects in the opposite direction to the connector.
  • the connection cable is thus surrounded by the shielding device over a certain length which further reduces the risk of electromagnetic leakage around the cable.
  • the flexible appendix forms part of the protruding collar. The flexible appendage of the movable element thus completes the projecting flange of the conductive body.
  • the opening forms a reception zone adapted to the passage of a power cable connected to the connector and an access zone extending from the reception zone to an edge of the body. so that the cable can be set up in the receiving area by engaging it through the access area.
  • the movable element is initially separated from the body and only blocks the access zone once in place on the body.
  • the body and the movable element are integrally molded of plastics material and connected to each other by bridges of brittle materials.
  • the operator responsible for connecting the cable can therefore initially connect the cable to the electrical connector without worrying about the shielding device, then in a second step, enter a shielding device according to the invention, in the one-piece state, detach the moving element from the body by breaking the material bridges, engage the body on the cable through the access area into the receiving area, return the body to the back of the connector and finally slide the movable member into the access area of the body until the movable element comes into contact with the screen of the connecting cable.
  • the electromagnetic shielding device of the invention is intended to be mounted on the rear side of an electrical connector, where the power cable is connected.
  • an electrical connector 1 is seen from its rear face 12.
  • the electrical connector 1 which here is advantageously a low voltage female electrical connector, comprises an electromagnetic shielding casing 10 which defines a front face 11 forming a receiving housing (not visible ) adapted to receive a appropriate male connector.
  • the housing 10 also defines the rear face 12 where a power supply cable (not shown) is intended to be connected.
  • the rear face 12 of the housing 10 is widely open and accessible for connecting the son of the power cable.
  • the electromagnetic shielding device of the invention is adapted to be mounted on the accessible open rear face 12 of the electrical connector 1 in the manner of a cap.
  • the shielding device of the invention comprises two constituent elements, namely an electrically conductive body 2 and an electrically conductive movable element which is displaceable relative to the body 2.
  • the body 2 and the movable element 3 can be made of metal or in a plastic material metallized surface or in the mass.
  • the body 2 is attached to the open rear face 12 of the housing 10 of the electrical connector 1 also forming an electromagnetic shielding cap.
  • the body 2 has dimensions that are compatible with those of the housing 10 and comprises fastening or fastening means for a stable attachment of the body 2 to the rear face 12 of the housing 10. This attachment can be made by any known means such as snugging, snapping, spearing, gluing or welding.
  • the body 2 defines a panel 20 which closes almost all of the rear face 12 of the housing 10.
  • the panel 20 has dimensions substantially equal to or compatible with those of the open rear face 12 of the housing 10.
  • the panel 20 is pierced with an opening 21 which is substantially in the center of the panel 20.
  • This opening 21 defines a through passage which provides access to the inside of the housing where the connection contacts for the power cable are located.
  • This substantially central opening 21 therefore defines a passage for the power cable once it is connected to the connector 1.
  • the power cable has not been shown for the sake of clarity of the figures. However, it is very easy to imagine a cable extending through the opening 21 passing through the panel 20 to access the inside of the housing 10 of the connector 1.
  • the panel 20 defines a notch 22 which extends from the opening 21 to an edge 201 of the panel 20.
  • the notch 22 extends in the extension of the central opening 21. It can even be seen on the figure 1 that the rear face 12 of the housing 10 is visible through the notch 22 while at the opening 21 the rear face 12 is pierced with a through hole for the power cable.
  • the opening 21 defining the cable receiving area is bordered by a projecting flange 23 which extends from the panel 20 for a distance in the opposite direction to the connector 1.
  • This flange 23 is intended to at least partially wrap the power cable over a certain length.
  • the notch 22 allows insertion of the cable into the opening 21 and thereby defines an access area of the opening 21 for the power cable. It is easily understood that the power cable does not need to be introduced by one end into the opening 21, but that it is sufficient to insert the body 2 on the power cable at any location its length by making it penetrate into the body 2 through the notch 22 until it reaches the level of the opening 21. Therefore, it can be said that the body 2 only partially surrounds the cable supply, since at the notch 22, the cable is not surrounded by the body 2. However, it may be noted that the opening 21, and more particularly the collar 23 surrounds the cable over more than 180 ° .
  • the indentation 22 defines lateral edges 24 which are each provided with one or more detents 25 which are directed towards each other, as can be seen on the figure 3 .
  • detents 25 The function of these detents 25 will be given below.
  • the panel 20 also defines two guiding flanges 26 which extend at the level of the notch 22 and at least partially cover the lateral edges 24. Thus, behind these lateral flanges 26 there are sliding guide housings for receiving the edges of the movable member as will be seen hereinafter.
  • the electrically conductive movable member 3 is an element that can be structurally separated from the body 2. It can be made completely independently, but preferably, the body 2 and the movable member 3 are made by integrally molding while being connected by bridges of brittle material 230, as can be seen on the figure 6 . The movable member 3 can be separated from the body 2 by breaking the material bridges 230 so that the two parts are then completely separate and independent.
  • the movable element 3 is substantially in the form of a flap 30 whose dimensions allow to close at least the notch 22 and advantageously a portion of the opening 21. In a way, the movable element 3 completes the panel 20 at its notch 22 to leave only part of the opening 21 which serves for the passage of the power cable.
  • the body 2 and the movable member 3 completely surround the power cable.
  • the flap 30 formed by the movable element 3 has a substantially rectangular or square configuration, and comprises an upper edge 31, two lateral edges 32 and a lower edge 35.
  • the upper edge 31 has a profiled configuration adapted to complete the open edge 201 of the panel 20 of the body 2, as can be seen on the figure 2 when the movable member 3 is not engaged in the body 2.
  • the lateral edges 32 of the flap 30 are provided with detent teeth 33 intended to snap-cooperate with the detents 25 formed on the lateral edges 24 of the latch. 22.
  • the flap 30 of the movable member 3 also forms with a protruding periphery 35 projecting from the side edges 32.
  • the side edges 32 each define a series of ratchet teeth 33 so that the element mobile 3 can engage on the notches 25 in different positions, in this case here 5 positions, since there are 5 ratchet teeth 33 on each edge 32. It is easily understood that the movable member 3 can be inserted more or less deeply in the notch 22 and thus in the opening 21 with its lower edge 34.
  • the translational guidance of the movable element 3 in the notch 22 is provided by the flanges 26 which cover the edges 32 of the flap 30.
  • the projecting periphery 35 of the flap 30 is positioned adjacent to the flange 26, as we can see on the figure 2 .
  • the movable element 3 is advantageously formed with a lower end forming an elastically deformable flexible appendage 34 adapted to come into pressed contact against the power cable, and more particularly against the shielding screen of the feeder cable.
  • the flexible appendage 34 may be in the form of a flexible tongue that extends away from the flap 30 in the same direction as the projecting flange 23.
  • the flexible tongue 34 forms a part or completes the projecting collar 23 .
  • the guided translational movement of the movable member 3 in the notch 22 is only one direction, namely that going into the reduction. of the section of the opening 21. More simply, the movable member 3 can only be pressed into the notch 22 and can not be removed because of the orientation of the notches 25.
  • the operator in charge of the wiring can thus operate in a very simple way: he can begin by connecting the power cable to the rear face of the connector 1. Then he can seize a shielding device as represented on the figure 6 , ie with the movable member 3 still connected to the body 2 by bridges of brittle material 230. It begins by separating the movable member 3 body 2 he just place around the cable by passing it to through the notch 22 into the opening 21. It then returns the body 2 on the rear face 12 of the housing 10 of the connector 1 by sliding the cable through the opening 21. Then, it suffices to insert the movable element 3 in the notch 22, that is to say under the flanges 26 of the body 2.
  • the teeth 23 begin to engage with the notches 25. From at this moment, the movable member 3 is no longer removable from the body 2. The operator continues to push on the upper edge 31 of the movable member 3 until the flexible appendix 34 comes into contact pressed against the power cable. During movement of the movable member, the section of the central opening 21 decreases until there is practically no space around the power cable. The implementation of the shielding device of the invention is then complete.
  • the device of the invention is particularly flat, that is to say it has only a very small thickness so that the power cable can be folded right out of the flange 23.
  • the bottom of the indentation 22 can be closed by a wall 26 so that the central opening 21 is isolated: in this embodiment, there is no longer an access zone allowing the cable to be inserted along its length in the central opening.
  • the movable member 3 then slides under the wall 27 below the lateral flanges 26.
  • the flexible appendix 34 cooperates in the same way at the opening 21 to reduce its passage section and thus come into contact against against the power cable.
  • the electromagnetic shielding device of the invention is particularly simple to manufacture, since only one mold is needed. In addition, it is very simple to implement since it can be put in place after connecting the power cable to the connector.

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  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Description

La présente invention concerne un dispositif de blindage électromagnétique destiné à être monté sur un connecteur électrique auquel est raccordé un câble d'alimentation sur un des ses côtés. Le dispositif de blindage est adapté à être monté sur le connecteur du côté où est raccordé le câble d'alimentation. En général, un connecteur électrique comprend un boîtier présentant une face avant destinée à recevoir un autre connecteur de genre opposé et une face arrière destinée au raccordement d'un câble d'alimentation. Dans les connecteurs électrique basse tension, il est d'usage de blinder le corps du connecteur électrique en le métallisant ou en le réalisant en métal. Toutefois, sa face avant et sa face arrière restent ouvertes et accessibles pour pouvoir raccorder le câble d'alimentation et enficher un connecteur électrique de genre opposé.The present invention relates to an electromagnetic shielding device for mounting on an electrical connector to which is connected a power cable on one of its sides. The shielding device is adapted to be mounted on the connector on the side where the power cable is connected. In general, an electrical connector comprises a housing having a front face for receiving another connector of the opposite kind and a rear face for connecting a power cable. In low voltage electrical connectors, it is customary to shield the body of the electrical connector by metallizing it or by making it out of metal. However, its front and rear face remain open and accessible to connect the power cable and plug an opposite kind of electrical connector.

Le document EP 0 342 828 décrit un dispositif selon le préambule de la revendication 1.The document EP 0 342 828 describes a device according to the preamble of claim 1.

La présente invention s'appliquera plus particulièrement au blindage du côté où se raccorde la câble d'alimentation. En effet, il est également nécessaire de blinder électromagnétiquement le côté ouvert où se raccorde le câble d'alimentation.The present invention will apply more particularly to the shield on the side where the power cable is connected. Indeed, it is also necessary to electromagnetically shield the open side where the power cable is connected.

Pour cela, il est déjà connu d'utiliser des capuchons métalliques ou métallisés que l'on vient adapter sur la face arrière du connecteur électrique. Ces capuchons métalliques ou métallisés incorporent des dispositifs complexes de pinces, de manchons ou de guillotines pour réaliser la mise à la terre de l'écran du câble pour ainsi obtenir une continuité électrique.For this, it is already known to use metal or metallized caps that are adapted to the rear face of the electrical connector. These metal or metallized caps incorporate complex devices of clamps, sleeves or guillotines to achieve the grounding of the screen of the cable to thereby obtain electrical continuity.

La présente invention a pour but de simplifier ces dispositifs de l'art antérieur en définissant un capuchon ou dispositif de blindage électromagnétique de conception et d'utilisation très simple tout en assurant un blindage parfait à 360° tout autour du câble et en mettant l'écran du câble à la terre.The present invention aims to simplify these devices of the prior art by defining a cap or electromagnetic shielding device of simple design and use while providing a perfect 360 ° shielding all around the cable and putting the screen of the cable to the ground.

Pour atteindre ce but, la présente invention propose un dispositif de blindage électromagnétique destiné à être monté sur un connecteur électrique pourvu d'un câble d'alimentation raccordé sur un côté du connecteur, ledit dispositif de blindage étant adapté à être monté sur le connecteur du côté où s'étend le câble d'alimentation, ledit dispositif de blindage étant pourvu d'une ouverture définissant un passage pour le câble d'alimentation raccordé au connecteur, ledit dispositif de blindage comprenant un corps électriquement conducteur destiné à être monté sur le connecteur et un élément électriquement conducteur déplaçable par rapport au corps et adapté à réduire par son déplacement par rapport au corps la section de l'ouverture pour ainsi diminuer le passage pour le câble d'alimentation. L'élément mobile permet d'adapter la section de l'ouverture à la taille (épaisseur ou diamètre) du câble utilisé afin de réduire au minimum l'espace autour du câble. On réduit ainsi les fuites électromagnétiques au niveau où le câble sort du dispositif de blindage. De plus, le déplacement de l'élément mobile permet de venir en contact appuyé avec le câble, ou plus particulièrement avec l'écran de blindage du câble. On réalise ainsi un bon contact électrique entre le dispositif de blindage et l'écran du câble.To achieve this object, the present invention provides an electromagnetic shielding device for mounting on an electrical connector having a power cable connected to one side of the connector, said shielding device being adapted to be mounted on the connector of the connector. side where extends the power cable, said shielding device being provided with an opening defining a passage for the power cable connected to the connector, said shielding device comprising an electrically conductive body intended to be mounted on the connector and a electrically conductive member movable relative to the body and adapted to reduce the displacement of the section of the opening relative to the body to thereby reduce the passage for the power cable. The movable member adapts the section of the opening to the size (thickness or diameter) of the cable used to minimize the space around the cable. This reduces the electromagnetic leakage at the level where the cable exits the shielding device. In addition, the displacement of the movable member makes it possible to come into pressed contact with the cable, or more particularly with the shielding screen of the cable. This provides a good electrical contact between the shielding device and the cable screen.

Selon une forme de réalisation avantageuse, l'élément mobile est déplaçable translativement par rapport au corps pour réduire la section de l'ouverture. Avantageusement, l'élément mobile définit une partie du bord de l'ouverture.According to an advantageous embodiment, the movable element is translatable relative to the body to reduce the section of the opening. Advantageously, the movable element defines a part of the edge of the opening.

Selon une forme de réalisation, l'élément mobile est dépiaçable unidirectionnellement dans le sens de la réduction de la section de l'ouverture. Avantageusement, l'élément mobile coopère avec le corps de manière à définir plusieurs positions définissant des sections d'ouverture différentes. De préférence, l'élément mobile coulisse dans le corps avec un système d'encliquetage unidirectionnel à crans d'arrêt. L'élément mobile est donc monté coulissant sur le corps du dispositif et il suffit à l'opérateur de pousser l'élément mobile vers le câble de raccordement, la position finale étant atteinte lorsqu'il n'est plus possible d'encliqueter un cran supplémentaire.According to one embodiment, the movable member is unidirectionally steerable in the direction of reducing the section of the opening. Advantageously, the movable element cooperates with the body so as to define several positions defining different opening sections. Preferably, the movable member slides in the body with a one-way detent system with locking catches. The movable element is thus slidably mounted on the body of the device and it is sufficient for the operator to push the movable element towards the connecting cable, the final position being reached when it is no longer possible to snap a notch additional.

Selon une autre caractéristique de l'invention, l'élément mobile comprend un appendice souple élastiquement déformable définissant une partie du bord de l'ouverture. Ainsi, le contact électrique entre l'élément mobile et l'écran du câble de raccordement est amélioré.According to another characteristic of the invention, the movable element comprises an elastically deformable flexible appendage defining a part of the edge of the opening. Thus, the electrical contact between the movable element and the screen of the connecting cable is improved.

Selon un autre aspect, l'ouverture est bordée par une collerette qui fait saillie dans la direction opposée au connecteur. Le câble de raccordement est ainsi entouré par le dispositif de blindage sur une certaine longueur ce qui réduit encore davantage les risques de fuites électromagnétiques autour du câble. Avantageusement, l'appendice souple forme une partie de la collerette saillante. L'appendice souple de l'élément mobile complète ainsi la collerette saillante du corps conducteur.In another aspect, the opening is bordered by a flange which projects in the opposite direction to the connector. The connection cable is thus surrounded by the shielding device over a certain length which further reduces the risk of electromagnetic leakage around the cable. Advantageously, the flexible appendix forms part of the protruding collar. The flexible appendage of the movable element thus completes the projecting flange of the conductive body.

Selon une caractéristique particulièrement avantageuse, l'ouverture forme une zone de réception adaptée au passage d'un câble d'alimentation raccordé au connecteur et une zone d'accès s'étendant à partir de la zone de réception jusqu'à un bord du corps de sorte que le câble peut être mis en place dans la zone de réception en l'engageant à travers la zone d'accès. Ainsi, il est possible de mettre le dispositif de blindage de l'invention en place alors que le câble est déjà raccordé au connecteur électrique. En effet, il n'est pas nécessaire de passer le câble à travers l'ouverture du corps en l'enfilant par une extrémité du câble, puisque la zone d'accès permet un engagement latéral du corps sur la longueur du câble de raccordement. On a de ce fait pas besoin de retirer le câble du connecteur électrique au cas où l'on a oublié de mettre le dispositif de blindage en place sur le câble avant raccordement au connecteur. En effet, avec les dispositifs de l'art antérieur, qui ne permettent pas une insertion latérale du dispositif de blindage, il arrivait souvent que l'opérateur soit obligé de retirer le câble qu'il vient juste de raccorder au connecteur car il a oublié le dispositif de blindage.According to a particularly advantageous characteristic, the opening forms a reception zone adapted to the passage of a power cable connected to the connector and an access zone extending from the reception zone to an edge of the body. so that the cable can be set up in the receiving area by engaging it through the access area. Thus, it is possible to put the shielding device of the invention in place while the cable is already connected to the electrical connector. Indeed, it is not necessary to pass the cable through the opening of the body by threading one end of the cable, since the access area allows a lateral engagement of the body on the length of the connecting cable. There is therefore no need to remove the cable of the electrical connector in case you forgot to put the shielding device in place on the cable before connection to the connector. Indeed, with the devices of the prior art, which do not allow a lateral insertion of the shielding device, it often happened that the operator is obliged to remove the cable he just connected to the connector because he forgot the shielding device.

Avantageusement, l'élément mobile est initialement séparé du corps et n'obture la zone d'accès qu'une fois en place sur le corps. De préférence, le corps et l'élément mobile sont moulés de manière monobloc en matière plastique et reliés l'un à l'autre par des ponts de matières cassants. L'opérateur chargé du raccordement du câble peut donc dans un premier temps raccorder le câble au connecteur électrique sans se soucier du dispositif de blindage, puis dans un second temps, saisir un dispositif de blindage selon l'invention, à l'état monobloc, détacher l'élément mobile du corps en cassant les ponts de matière, engager le corps sur le câble à travers la zone d'accès jusque dans la zone de réception, rapporter le corps à l'arrière du connecteur et enfin faire coulisser l'élément mobile dans la zone d'accès du corps jusqu'à ce que l'élément mobile vienne en contact de l'écran du câble de raccordement.Advantageously, the movable element is initially separated from the body and only blocks the access zone once in place on the body. Preferably, the body and the movable element are integrally molded of plastics material and connected to each other by bridges of brittle materials. The operator responsible for connecting the cable can therefore initially connect the cable to the electrical connector without worrying about the shielding device, then in a second step, enter a shielding device according to the invention, in the one-piece state, detach the moving element from the body by breaking the material bridges, engage the body on the cable through the access area into the receiving area, return the body to the back of the connector and finally slide the movable member into the access area of the body until the movable element comes into contact with the screen of the connecting cable.

L'invention sera maintenant plus amplement décrite en référence aux dessins joints donnant à titre d'exemples non limitatifs deux modes de réalisation de l'invention.The invention will now be more fully described with reference to the accompanying drawings giving by way of nonlimiting examples two embodiments of the invention.

Sur les figures :

  • la figure 1 est une vue en perspective éclatée montrant la face arrière d'un connecteur électrique équipé d'un dispositif de blindage selon l'invention avec l'élément mobile près à être monté sur le corps du dispositif,
  • la figure 2 est une vue similaire à celle de la figure 1 avec l'élément mobile en place sur le corps du dispositif,
  • la figure 3 est une vue en coupe transversale verticale à travers le dispositif de blindage selon l'invention avec l'élément mobile prêt à être rapporté sur le corps du dispositif,
  • la figure 4 est une vue similaire à celle de la figure 3 montrant une variante de réalisation de la figure 3,
  • la figure 5 est une vue similaire à celle de la figure 3 avec l'élément mobile en prise sur le corps du dispositif, et
  • la figure 6 est une vue similaire à celle de la figure 3 du dispositif de blindage de la figure 3 à la sotie du moule.
In the figures:
  • the figure 1 is an exploded perspective view showing the rear face of an electrical connector equipped with a shielding device according to the invention with the mobile element ready to be mounted on the body of the device,
  • the figure 2 is a view similar to that of the figure 1 with the movable element in place on the body of the device,
  • the figure 3 is a vertical cross-sectional view through the shielding device according to the invention with the mobile element ready to be attached to the body of the device,
  • the figure 4 is a view similar to that of the figure 3 showing an alternative embodiment of the figure 3 ,
  • the figure 5 is a view similar to that of the figure 3 with the movable member engaged with the body of the device, and
  • the figure 6 is a view similar to that of the figure 3 of the shielding device of the figure 3 at the mold sotie.

Le dispositif de blindage électromagnétique de l'invention est destiné à être monté sur le côté arrière d'un connecteur électrique, là où se raccorde le câble d'alimentation. En se référant par exemple à la figure 1, on voit un connecteur électrique 1 depuis sa face arrière 12. Le connecteur électrique 1, qui est ici avantageusement un connecteur électrique femelle basse tension, comprend un boîtier de blindage électromagnétique 10 qui définit une face avant 11 formant un logement de réception (non visible) adapté à recevoir un connecteur mâle approprié. Le boîtier 10 définit également la face arrière 12 où un câble d'alimentation électrique (non représenté) est destiné à être raccordé. La face arrière 12 du boîtier 10 est largement ouverte et accessible pour le raccordement des fils du câble d'alimentation.The electromagnetic shielding device of the invention is intended to be mounted on the rear side of an electrical connector, where the power cable is connected. By referring for example to the figure 1 an electrical connector 1 is seen from its rear face 12. The electrical connector 1, which here is advantageously a low voltage female electrical connector, comprises an electromagnetic shielding casing 10 which defines a front face 11 forming a receiving housing (not visible ) adapted to receive a appropriate male connector. The housing 10 also defines the rear face 12 where a power supply cable (not shown) is intended to be connected. The rear face 12 of the housing 10 is widely open and accessible for connecting the son of the power cable.

Le dispositif de blindage électromagnétique de l'invention est adapté à être monté sur la face arrière ouverte accessible 12 du connecteur électrique 1 à la manière d'un capuchon. Le dispositif de blindage de l'invention comprend deux éléments constitutifs, à savoir un corps électriquement conducteur 2 et un élément mobile électriquement conducteur qui est déplaçable par rapport au corps 2. Le corps 2 et l'élément mobile 3 peuvent être réalisés en métal ou en un matériau plastique métallisé en surface ou dans la masse.The electromagnetic shielding device of the invention is adapted to be mounted on the accessible open rear face 12 of the electrical connector 1 in the manner of a cap. The shielding device of the invention comprises two constituent elements, namely an electrically conductive body 2 and an electrically conductive movable element which is displaceable relative to the body 2. The body 2 and the movable element 3 can be made of metal or in a plastic material metallized surface or in the mass.

Comme on peut le voir sur les figures 1 et 2, le corps 2 est rapporté sur la face arrière ouverte 12 du boîtier 10 du connecteur électrique 1 en formant aussi un capuchon de blindage électromagnétique. Le corps 2 présente des dimensions compatibles avec celles du boîtier 10 et comprend des moyens de fixation ou d'accrochage permettant une fixation stable du corps 2 sur la face arrière 12 du boîtier 10. Cette fixation peut être réalisée par n'importe quel moyen connu tel que l'emmanchage en force, i'encliquetage, le harponnage, le collage ou encore le soudage.As can be seen on the figures 1 and 2 , the body 2 is attached to the open rear face 12 of the housing 10 of the electrical connector 1 also forming an electromagnetic shielding cap. The body 2 has dimensions that are compatible with those of the housing 10 and comprises fastening or fastening means for a stable attachment of the body 2 to the rear face 12 of the housing 10. This attachment can be made by any known means such as snugging, snapping, spearing, gluing or welding.

Le corps 2 définit un panneau 20 qui obture la quasi-totalité de la face arrière 12 du boîtier 10. Le panneau 20 a des dimensions sensiblement égales ou compatibles à celles de la face arrière ouverte 12 du boîtier 10. Le panneau 20 est percé d'une ouverture 21 qui est réalisée sensiblement au centre du panneau 20. Cette ouverture 21 définit un passage traversant qui donne accès à l'intérieur du boîtier où se trouve les contacts de raccordement pour le câble d'alimentation. Cette ouverture sensiblement centrale 21 définit donc un passage pour le câble d'alimentation une fois qu'il est raccordé au connecteur 1. Le câble d'alimentation n'a pas été représenté pour des raisons de clarté des figures. On peut cependant s'imaginer très facilement un câble s'étendant à travers l'ouverture 21 en passant à travers le panneau 20 pour accéder à l'intérieur du boîtier 10 du connecteur 1.The body 2 defines a panel 20 which closes almost all of the rear face 12 of the housing 10. The panel 20 has dimensions substantially equal to or compatible with those of the open rear face 12 of the housing 10. The panel 20 is pierced with an opening 21 which is substantially in the center of the panel 20. This opening 21 defines a through passage which provides access to the inside of the housing where the connection contacts for the power cable are located. This substantially central opening 21 therefore defines a passage for the power cable once it is connected to the connector 1. The power cable has not been shown for the sake of clarity of the figures. However, it is very easy to imagine a cable extending through the opening 21 passing through the panel 20 to access the inside of the housing 10 of the connector 1.

Au-dessus de l'ouverture 21 qui définit une zone de réception pour le câble d'alimentation, le panneau 20 définit une échancrure 22 qui part de l'ouverture 21 pour déboucher sur un bord 201 du panneau 20. On peut se référer à la figure 3 pour s'apercevoir que l'échancrure 22 s'étend dans le prolongement de l'ouverture centrale 21. On peut même voir sur la figure 1 que la face arrière 12 du boîtier 10 est visible à travers l'échancrure 22 alors qu'au niveau de l'ouverture 21 la face arrière 12 est percé d'un trou de passage pour le câble d'alimentation.Above the aperture 21 which defines a receiving area for the power cable, the panel 20 defines a notch 22 which extends from the opening 21 to an edge 201 of the panel 20. Reference may be made to the figure 3 to see that the notch 22 extends in the extension of the central opening 21. It can even be seen on the figure 1 that the rear face 12 of the housing 10 is visible through the notch 22 while at the opening 21 the rear face 12 is pierced with a through hole for the power cable.

L'ouverture 21 qui définit la zone de réception de câble est bordée par une collerette saillante 23 qui s'étend à partir du panneau 20 sur une certaine distance dans la direction opposée au connecteur 1. Cette collerette 23 est destinée à envelopper au moins partiellement le câble d'alimentation sur une certaine longueur.The opening 21 defining the cable receiving area is bordered by a projecting flange 23 which extends from the panel 20 for a distance in the opposite direction to the connector 1. This flange 23 is intended to at least partially wrap the power cable over a certain length.

L'échancrure 22 permet l'insertion du câble dans l'ouverture 21 et définit de ce fait une zone d'accès de l'ouverture 21 pour le câble d'alimentation. On comprend aisément que le câble d'alimentation n'a pas besoin d'être introduit par une de ses extrémités dans l'ouverture 21, mais qu'il suffit d'insérer le corps 2 sur le câble d'alimentation à un endroit quelconque de sa longueur en le faisant pénétrer dans le corps 2 par l'échancrure 22 jusqu'à ce qu'il parvienne au niveau de l'ouverture 21. Par conséquent, on peut dire que le corps 2 n'entoure que partiellement le câble d'alimentation, puisqu'au niveau de l'échancrure 22, le câble n'est pas entouré par le corps 2. Toutefois, on peut remarquer que l'ouverture 21, et plus particulièrement la collerette 23 entoure le câble sur plus de 180°.The notch 22 allows insertion of the cable into the opening 21 and thereby defines an access area of the opening 21 for the power cable. It is easily understood that the power cable does not need to be introduced by one end into the opening 21, but that it is sufficient to insert the body 2 on the power cable at any location its length by making it penetrate into the body 2 through the notch 22 until it reaches the level of the opening 21. Therefore, it can be said that the body 2 only partially surrounds the cable supply, since at the notch 22, the cable is not surrounded by the body 2. However, it may be noted that the opening 21, and more particularly the collar 23 surrounds the cable over more than 180 ° .

L'échancrure 22 définit des bords latéraux 24 qui sont pourvus chacun d'un ou de plusieurs crans d'arrêt 25 qui sont dirigés l'un vers l'autre, comme on peut le voir sur la figure 3. La fonction de ces crans d'arrêt 25 sera donnée ci-après.The indentation 22 defines lateral edges 24 which are each provided with one or more detents 25 which are directed towards each other, as can be seen on the figure 3 . The function of these detents 25 will be given below.

Le panneau 20 définit également deux rebords de guidage 26 qui s'étendent au niveau de l'échancrure 22 et recouvrent au moins partiellement les bords latéraux 24. Ainsi, il est ménagé derrière ces rebords latéraux 26 des logements de guidage par coulissement destinés à recevoir les bords de l'élément mobile comme on le verra ci-après.The panel 20 also defines two guiding flanges 26 which extend at the level of the notch 22 and at least partially cover the lateral edges 24. Thus, behind these lateral flanges 26 there are sliding guide housings for receiving the edges of the movable member as will be seen hereinafter.

L'élément mobile électriquement conducteur 3 est un élément qui peut être structurellement séparé du corps 2. Us peuvent être réalisés de manière totalement indépendante, mais de préférence, le corps 2 et l'élément mobile 3 sont réalisés par moulage de manière monobloc en étant reliés par des ponts de matière cassant 230, comme on peut le voir sur la figure 6. L'élément mobile 3 peut être séparé du corps 2 en cassant les ponts de matière 230 de sorte que les deux pièces sont alors totalement séparés et indépendantes.The electrically conductive movable member 3 is an element that can be structurally separated from the body 2. It can be made completely independently, but preferably, the body 2 and the movable member 3 are made by integrally molding while being connected by bridges of brittle material 230, as can be seen on the figure 6 . The movable member 3 can be separated from the body 2 by breaking the material bridges 230 so that the two parts are then completely separate and independent.

L'élément mobile 3 se présente sensiblement sous la forme d'un volet 30 dont les dimensions permettent d'obturer au moins l'échancrure 22 et avantageusement une partie de l'ouverture 21. En quelque sorte, l'élément mobile 3 vient compléter le panneau 20 au niveau de son échancrure 22 pour ne laisser qu'une partie de l'ouverture 21 qui sert au passage du câble d'alimentation. Le corps 2 et l'élément mobile 3 entourent complètement le câble d'alimentation.The movable element 3 is substantially in the form of a flap 30 whose dimensions allow to close at least the notch 22 and advantageously a portion of the opening 21. In a way, the movable element 3 completes the panel 20 at its notch 22 to leave only part of the opening 21 which serves for the passage of the power cable. The body 2 and the movable member 3 completely surround the power cable.

Le volet 30 que forme l'élément mobile 3 a une configuration sensiblement rectangulaire ou carrée, et comprend un bord supérieur 31, deux bords latéraux 32 et un bord inférieur 35. Le bord supérieur 31 a une configuration profilée adaptée à compléter le bord ouvert 201 du panneau 20 du corps 2, comme on peut le voir sur la figure 2, lorsque l'élément mobile 3 est ne prise dans le corps 2. Les bords latéraux 32 du volet 30 sont pourvus de dents d'encliquetage 33 destinées à coopérer par encliquetage avec les crans d'arrêt 25 formés sur les bords latéraux 24 de l'échancrure 22. Le volet 30 de l'élément mobile 3 forme également avec un pourtour saillant 35 qui fait saillie à partir des bords latéraux 32. Les bords latéraux 32 définissent chacun une série de dents d'encliquetage 33 de sorte que l'élément mobile 3 peut venir en prise sur les crans 25 en différentes positions, en l'occurrence ici 5 positions, puisqu'il y a 5 dents d'encliquetage 33 sur chaque bord 32. On comprend aisément que l'élément mobile 3 peut être inséré plus ou moins profondément dans l'échancrure 22 et de ce fait dans l'ouverture 21 avec son bord inférieur 34.The flap 30 formed by the movable element 3 has a substantially rectangular or square configuration, and comprises an upper edge 31, two lateral edges 32 and a lower edge 35. The upper edge 31 has a profiled configuration adapted to complete the open edge 201 of the panel 20 of the body 2, as can be seen on the figure 2 when the movable member 3 is not engaged in the body 2. The lateral edges 32 of the flap 30 are provided with detent teeth 33 intended to snap-cooperate with the detents 25 formed on the lateral edges 24 of the latch. 22. The flap 30 of the movable member 3 also forms with a protruding periphery 35 projecting from the side edges 32. The side edges 32 each define a series of ratchet teeth 33 so that the element mobile 3 can engage on the notches 25 in different positions, in this case here 5 positions, since there are 5 ratchet teeth 33 on each edge 32. It is easily understood that the movable member 3 can be inserted more or less deeply in the notch 22 and thus in the opening 21 with its lower edge 34.

Le guidage translatif de l'élément mobile 3 dans l'échancrure 22 est assuré par les rebords 26 qui viennent recouvrir les bords 32 du volet 30. En revanche, le pourtour saillant 35 du volet 30 vient se positionner de manière adjacente au rebord 26, comme on peut le voir sur la figure 2. Ainsi, l'engagement de l'élément mobile 3 dans l'échancrure 22 n'offre pratiquement aucun chemin de fuites électromagnétiques.The translational guidance of the movable element 3 in the notch 22 is provided by the flanges 26 which cover the edges 32 of the flap 30. On the other hand, the projecting periphery 35 of the flap 30 is positioned adjacent to the flange 26, as we can see on the figure 2 . Thus, the engagement of the movable member 3 in the notch 22 offers virtually no path of electromagnetic leakage.

L'élément mobile 3 est avantageusement formé avec une extrémité inférieure formant un appendice souple élastiquement déformable 34 adapté à venir en contact appuyé contre le câble d'alimentation, et plus particulière contre l'écran de blindage du câble d'alimentateur. L'appendice souple 34 peut se présenter sous la forme d'une languette flexible qui s'étend en éloignement du volet 30 dans le même sens que la collerette saillante 23. Avantageusement, la languette flexible 34 forme une partie ou complète la collerette saillante 23.The movable element 3 is advantageously formed with a lower end forming an elastically deformable flexible appendage 34 adapted to come into pressed contact against the power cable, and more particularly against the shielding screen of the feeder cable. The flexible appendage 34 may be in the form of a flexible tongue that extends away from the flap 30 in the same direction as the projecting flange 23. Advantageously, the flexible tongue 34 forms a part or completes the projecting collar 23 .

Il est à noter qu'en raison de l'orientation des crans 25 et des dents 33, le déplacement translatif guidé de l'élément mobile 3 dans l'échancrure 22 ne se fait que dans un sens, à savoir celui allant dans la réduction de la section de l'ouverture 21. Plus simplement, l'élément mobile 3 ne peut être qu'enfoncé dans l'échancrure 22 et ne peut pas en être retiré du fait de l'orientation des crans 25.It should be noted that because of the orientation of the notches 25 and teeth 33, the guided translational movement of the movable member 3 in the notch 22 is only one direction, namely that going into the reduction. of the section of the opening 21. More simply, the movable member 3 can only be pressed into the notch 22 and can not be removed because of the orientation of the notches 25.

L'opérateur chargé du câblage peut ainsi opérer de manière très simple : il peut commencer par raccorder le câble d'alimentation à la face arrière du connecteur 1. Ensuite il peut se saisir d'un dispositif de blindage comme représenté sur la figure 6, c'est à dire avec l'élément mobile 3 encore raccordé au corps 2 par les ponts de matière cassant 230. Il commence par séparer l'élément mobile 3 du corps 2 qu'il vient placer autour du câble en le faisant passer à travers l'échancrure 22 jusque dans l'ouverture 21. Il rapporte ensuite le corps 2 sur la face arrière 12 du boîtier 10 du connecteur 1 en faisant coulisser le câble à travers l'ouverture 21. Ensuite, il lui suffit d'insérer l'élément mobile 3 dans l'échancrure 22, c'est à dire sous les rebords 26 du corps 2. Au bout d'une certaine course d'insertion, les dents 23 commencent à venir en prise avec les crans 25. A partir de ce moment, l'élément mobile 3 n'est plus retirable du corps 2. L'opérateur continue à pousser sur le bord supérieur 31 de l'élément mobile 3 jusqu'à ce que l'appendice souple 34 vienne en contact appuyé contre le câble d'alimentation. Au cours du déplacement de l'élément mobile, la section de l'ouverture centrale 21 diminue jusqu'à ce qu'il n'y ait pratiquement plus d'espace autour du câble d'alimentation. La mise en place du dispositif de blindage de l'invention est alors terminée.The operator in charge of the wiring can thus operate in a very simple way: he can begin by connecting the power cable to the rear face of the connector 1. Then he can seize a shielding device as represented on the figure 6 , ie with the movable member 3 still connected to the body 2 by bridges of brittle material 230. It begins by separating the movable member 3 body 2 he just place around the cable by passing it to through the notch 22 into the opening 21. It then returns the body 2 on the rear face 12 of the housing 10 of the connector 1 by sliding the cable through the opening 21. Then, it suffices to insert the movable element 3 in the notch 22, that is to say under the flanges 26 of the body 2. At the end of a certain insertion stroke, the teeth 23 begin to engage with the notches 25. From at this moment, the movable member 3 is no longer removable from the body 2. The operator continues to push on the upper edge 31 of the movable member 3 until the flexible appendix 34 comes into contact pressed against the power cable. During movement of the movable member, the section of the central opening 21 decreases until there is practically no space around the power cable. The implementation of the shielding device of the invention is then complete.

Il est à noter que le dispositif de l'invention est particulièrement plat, c'est à dire qu'il ne présente qu'une très faible épaisseur de sorte que le câble d'alimentation peut être plié dès la sortie de la collerette 23.It should be noted that the device of the invention is particularly flat, that is to say it has only a very small thickness so that the power cable can be folded right out of the flange 23.

En variante représenté sur la figure 4, le fond de l'échancrure 22 peut être obturée par une paroi 26 de sorte que l'ouverture centrale 21 est isolée : dans ce mode de réalisation, il n'y a plus de zone d'accès permettant au câble d'être inséré sur sa longueur dans l'ouverture centrale. Il s'agit là d'un mode de réalisation moins avantageux que celui de la figure 3. L'élément mobile 3 coulisse alors sous la paroi 27 en dessous des rebords latéraux 26. Toutefois, l'appendice souple 34 coopère de la même manière au niveau de l'ouverture 21 pour réduire sa section de passage et ainsi venir en contact appuyé contre le câble d'alimentation.In a variant represented on the figure 4 , the bottom of the indentation 22 can be closed by a wall 26 so that the central opening 21 is isolated: in this embodiment, there is no longer an access zone allowing the cable to be inserted along its length in the central opening. This is a less advantageous embodiment than that of the figure 3 . The movable member 3 then slides under the wall 27 below the lateral flanges 26. However, the flexible appendix 34 cooperates in the same way at the opening 21 to reduce its passage section and thus come into contact against against the power cable.

Le dispositif de blindage électromagnétique de l'invention est particulièrement simple à fabriquer, puisqu'il suffit d'un moule unique. De plus, il est très simple à mettre en oeuvre puisqu'il est possible de le mettre en place après le raccordement du câble d'alimentation au connecteur.The electromagnetic shielding device of the invention is particularly simple to manufacture, since only one mold is needed. In addition, it is very simple to implement since it can be put in place after connecting the power cable to the connector.

Claims (12)

  1. A shielding device for mounting on an electrical connector (1) provided with a power supply cable connected to one end (12) of the connector, said shielding device being adapted to be mounted on the connector at its end from which said power supply cable extends, said shielding device being provided with an opening (21) defining a passage for the power supply cable connected to the connector, said shielding device comprising an electrically conductive body (2) for mounting on the connector and an electrically conductive element (3) movable relative to the body, the electromagnetic shielding device being characterized in that said element is adapted on moving relative to the body to reduce the section of the opening so as thereby to reduce the passage for the power supply cable.
  2. A shielding device according to claim 1, wherein the end (12) forms a largely open rear face, the body (2) being fitted on said rear face of the connector like a cap.
  3. A shielding device according to claim 1 or claim 2, wherein the movable element (3) defines a portion (34) of the edge (23) of the opening (21).
  4. A shielding device according to any preceding claim, wherein the movable element (3) is movable in one direction only in the direction for reducing the section of the opening (21).
  5. A shielding device according to any preceding claim, wherein the movable element (3) co-operates with the body (2) so as to define a plurality of positions defining openings of different sections.
  6. A shielding device according to any preceding claim, wherein the movable element (3) slides in the body (2) with a one-way ratchet system with stop teeth (25, 33).
  7. A shielding device according to any preceding claim, wherein the movable element (3) includes an elastically-deformable flexible appendix (34) defining a portion of the edge (23) of the opening (21).
  8. A shielding device according to any preceding claim, wherein the opening (21) is bordered by a collar (23) that projects away from the connector.
  9. A shielding device according to claims 7 and 8, wherein the flexible appendix (34) forms a portion of the projecting collar (23).
  10. A shielding device according to any preceding claim, wherein the opening (21) forms a reception zone adapted to passing a power supply cable connected to the connector and an access zone (22) extending from the reception zone to an edge (201) of the body (2) in such a manner that the cable can be put into place in the reception zone by being engaged through the access zone.
  11. A shielding device according to claim 10, wherein the movable element (3) is initially separate from the body (2) and closes the access zone (22) once it is in place on the body (2).
  12. A shielding device according to any preceding claim, wherein the body (2) and the movable element (3) are molded as a single piece of plastics material and are connected to each other by breakable bridges (230) of material.
EP20020290916 2001-04-18 2002-04-12 Electromagnetic shielding device for electrical connector Expired - Lifetime EP1251601B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0105312 2001-04-18
FR0105312A FR2823914B1 (en) 2001-04-18 2001-04-18 ELECTROMAGNETIC SHIELDING DEVICE FOR ELECTRICAL CONNECTOR

Publications (2)

Publication Number Publication Date
EP1251601A1 EP1251601A1 (en) 2002-10-23
EP1251601B1 true EP1251601B1 (en) 2010-01-06

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Application Number Title Priority Date Filing Date
EP20020290916 Expired - Lifetime EP1251601B1 (en) 2001-04-18 2002-04-12 Electromagnetic shielding device for electrical connector

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EP (1) EP1251601B1 (en)
FR (1) FR2823914B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1738436B1 (en) 2004-04-23 2011-10-19 Tyco Electronics AMP Espana S.A. A cap, a termination assembly and a housing assembly for a modular telecom connection jack
US7476120B2 (en) 2004-12-17 2009-01-13 Panduit Corp. Wire containment cap with an integral strain relief clip
US7210964B2 (en) * 2005-08-15 2007-05-01 Honeywell International, Inc. Electrical connector backshell assemblies
US8968024B2 (en) 2012-01-24 2015-03-03 Panduit Corp. Communication connector with wire containment cap for improved cable retention

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3751579A (en) * 1972-02-04 1973-08-07 Honeywell Inc Electrical wiring bushing with strain relief
US4195899A (en) * 1977-09-19 1980-04-01 Bunker Ramo Corporation Electrical connector with improved strain relief means
US4842547A (en) * 1988-05-19 1989-06-27 Amp Incorporated Staple cable strain relief
US5372513A (en) * 1993-11-17 1994-12-13 Thomas & Betts Corporation Electrical connector with cable shield ground clip
SE513886C2 (en) * 1999-03-05 2000-11-20 Thorsman & Co Ab Strain relief device for electric cables preferably in an appliance or junction box

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EP1251601A1 (en) 2002-10-23
FR2823914A1 (en) 2002-10-25
FR2823914B1 (en) 2003-08-15

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