EP0488896B1 - Double insulated electrical plug - Google Patents
Double insulated electrical plug Download PDFInfo
- Publication number
- EP0488896B1 EP0488896B1 EP19910403226 EP91403226A EP0488896B1 EP 0488896 B1 EP0488896 B1 EP 0488896B1 EP 19910403226 EP19910403226 EP 19910403226 EP 91403226 A EP91403226 A EP 91403226A EP 0488896 B1 EP0488896 B1 EP 0488896B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- insert
- shell
- electrical plug
- insulating
- plug according
- 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
Links
- 238000005192 partition Methods 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims 4
- 230000000295 complement effect Effects 0.000 claims 2
- 230000037431 insertion Effects 0.000 claims 2
- 238000003780 insertion Methods 0.000 claims 2
- 230000007935 neutral effect Effects 0.000 description 5
- 239000004952 Polyamide Substances 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- CNQCVBJFEGMYDW-UHFFFAOYSA-N lawrencium atom Chemical compound [Lr] CNQCVBJFEGMYDW-UHFFFAOYSA-N 0.000 description 3
- 229920002647 polyamide Polymers 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000009422 external insulation Methods 0.000 description 1
- 230000003100 immobilizing effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Images
Classifications
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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
- 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
- H01R43/24—Assembling by moulding on contact members
-
- 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
- H01R24/28—Coupling parts carrying pins, blades 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
- H01R2103/00—Two poles
Definitions
- the present invention relates to an electrical plug for connecting two elements of an electrical cable with two pins each having a connection means, said pins being fitted in two housings provided in an insulating insert, and said plug being electrically insulated by an external overmolding.
- the invention finds a particularly advantageous application in the general field of connectors, and in particular in that of bipolar and bipolar + earth plugs when a high degree of insulation is sought.
- this type of known electrical plug has the disadvantage of an insufficient electrical insulation with respect in particular to flying strands which could escape from the connection drums and thus come into contact with the overmolding and even be flush with it. particularly long flying strands, which is not acceptable for safety reasons.
- German patent application DE-A-3 807 309 proposes to provide the electrical plug of the preamble with an intermediate insulating shell covering the insert and intended to receive said external overmolding.
- the insulating shell placed intermediate between the insert and the overmolding, prevents any flying strand, whatever its length, from coming into contact with the overmolding.
- very long flying strands cannot, at worst, leave the plug only through the front part of the plug, i.e. on the side of the pins, a location which is not accessible when the electrical plug is connected.
- the placement of the shell on the insert requires that one end of the cable be introduced through a hole in the shell, which can only be done manually. , excluding any possibility of automatic assembly of the assembly.
- Document DE-B-1 020 078 teaches an electrical plug which includes a shell intended to be placed on an insert carrying the pins connected to the cable.
- This shell has two lateral openings which, when the shell is positioned on the insert, allows the flying strands to exit so that they can then come into contact with the overmolding and present a danger when the plug is connected.
- the lateral openings of the shell for introduction onto the electric cable, are closed in the upper part.
- the shell is therefore placed on the insert in a single vertical movement, the upper wall of the lateral openings coming to bear on the cable so that it bends to pass through it.
- the technical problem to be solved by the object of the present invention is to produce an electrical plug for connecting two elements of an electrical cable with two pins each having a connection means, said pins being fitted in two housings arranged in a insulating insert, and said plug comprising an intermediate insulating shell covering said insert and intended to receive an external overmolding of insulation, electrical plug which would allow very easy mechanization of the assembly of all the parts constituting it, and in particular which would allow the automatic installation of the insulating shell on the insert, without exerting any constraint on the cable, in particular without bending it.
- the solution to the technical problem posed consists, according to the present invention, in that said shell comprises means for lateral introduction of the shell onto said cable constituted by a lateral groove open at its two ends so as to allow the establishment of the insulating shell on the insert in a lateral movement and then bring it in a vertical movement on said insert.
- said lateral groove provides walls forming means for immobilizing the elements of the cable in the electrical plug.
- the lateral groove performs a double function, that of passing the cable through the shell and that of retaining the elements of the cable.
- said insulating shell includes lateral ribs for stiffening said overmolding.
- this advantageous arrangement reduces the cost of the electrical plug object of the invention since the material constituting the shell, polypropylene for example, can be significantly cheaper (about 3 times) than that constituting the insulating insert (polyamide for example) .
- Figure 1 is a perspective view of an insert and a shell of a bipolar electrical plug according to the invention.
- FIG. 2 is a perspective view, in the direction of arrow F1, of the shell of FIG. 1.
- FIG. 3 is a perspective view of the assembly formed by the insert and the shell of FIG. 1.
- Figure 4 is a perspective view of the electrical plug of Figure 1 after overmolding.
- Figure 5 is a sectional view of the insert of a bipolar electrical plug + earth according to the invention.
- Figure 6 is a bottom view of the plug of Figure 5.
- Figure 7 is a sectional view along line II-II of the sheet of Figure 5.
- FIG. 1 shows, in perspective, an electrical plug of the bipolar type for connecting two elements 101, 102, the neutral and the phase for example of an electric cable 100, with two pins 201, 202 each having a connection means which, in the embodiment of Figure 1, is, without limitation, a barrel 211, 212 of connection intended to receive strands 111, 112 stripped of the element 101, 102 corresponding.
- the fixing of said strands 111, 112 in the drums 211, 212, of connection is obtained, in the case of FIG. 1, by crimping through the slots 311, 312.
- the pins 201, 202 which can be made of brass, are fitted by ultrasound, overmolding, or any other means, into two housings 301, 302 arranged in an insulating insert 300 made of molded polyamide for example.
- the electrical plug comprises an insulating shell 400 intended to cover said insert 300 and to receive an overmolding 500, shown in FIG. 4, which makes it possible to ensure the external insulation of said plug.
- the shell 400 thus placed in the intermediate position between the insert 300 and the isolation overmolding 500, provides maximum electrical insulation of the plug, in particular against the flying strands which could escape from the connection drums 211, 212.
- the enveloping nature of the shell 400 has the advantage of forcing particularly long flying strands out of the plug on the side of the pins, in a place where, given overmolding, they do not present any danger when the plug is connected.
- the insulating shell 400 has lateral ribs 401, 402 for stiffening the isolation overmolding, which makes it possible to reduce the cost price of the plug.
- the material constituting the shell polypropylene for example, being in fact less expensive than the polyamide of the insert in which said stiffening ribs are usually made.
- Figure 1 also shows that the insulating insert 300 has a recess 320 limited by two side partitions 331, 332 and inside which are housed the elements 101, 102 of the cable 100 in their part between the cable and the drums. connection.
- the insulating shell 400 has walls 421, 422 which bear against said lateral partitions 331, 332 when the shell is placed on the insert.
- the walls 421, 422, acting as immobilization means form with the recess 320 retaining means in baffle with respect to the elements 101, 102.
- This baffle system makes it possible to completely preserve the connections ensuring the immobilization of the elements during a brutal pull of the cable.
- the shell 400 comprises means for lateral introduction of said shell onto said cable 100.
- said lateral introduction means consist of a lateral groove formed by the two walls 421, 422 and one third wall 423.
- the shell can then be put in place very easily, it suffices for this to present it on the cable in a lateral movement illustrated by the arrow F1 in FIG. 1, then to bring it, according to arrow F2, on insert 300 to its final position.
- the lateral groove provides both the means for introducing the shell onto the cable and the walls of the immobilization means.
- the insulating shell 400 is held in place using fixing means which are constituted by two fixing lugs 330 arranged on either side of the insert 300, one of said pins cooperating with a slot 410 which, as shown in Figure 2, is arranged in said shell on the wall 423 of the lateral groove.
- fixing means which are constituted by two fixing lugs 330 arranged on either side of the insert 300, one of said pins cooperating with a slot 410 which, as shown in Figure 2, is arranged in said shell on the wall 423 of the lateral groove.
- the introduction of said lug into the slot 410 is carried out by elastic deformation of the shell, the latter resuming its initial shape when the lug 330 is engaged in said slot.
- the presence of two pins, only one of which is actually used, makes it possible to introduce the shell onto the insert in any direction, thereby increasing the ease of assembly of the plug.
- Figures 5 and 6 show an alternative embodiment of the electrical plug described above with reference to Figures 1 to 4, for the connection of a cable 100 comprising, in addition to the phase and the neutral 101, 102, an element 103 for setting To the earth.
- the insulating insert 300 also comprises a third housing 303 in which is disposed a means 350 of electrical contact in the form of a barrel, opening to the outside of the insert by a fixing means 360, a rivet for example, to a ground rail 600.
- the strand 113 of the grounding element 103 is crimped into the barrel 350, through a light (not shown), equivalent to the lights 311, 312 of FIG. 1.
- the insert 300 includes two separate recesses 321, 322 intended to house the elements 101 and 102 respectively.
- the bottom view shown in Figure 6, shows the arrangement of the earth rail 600 with respect to the insert 300 and the overmolding 500 when the electrical plug is completely assembled.
- the three elements 101, 102, 103, phase, neutral and earthed have an identical length so that during assembly, due to the sliding of the hull on the insert and blocking of the phase and neutral elements by said baffles, the grounding element 103 has an extra length, or soft strand, of safety, as illustrated in FIG. 7.
- a brutal pull on the cable 100 induces the rupture of at least one of the phase or neutral elements before the earthing element.
- the insulating insert 300 comprises introduction means, constituted by cones 341, 342, 343, making it possible to introduce the elements 101, 102, 103 of the cable 100 with respect respectively to the means 301, 302 for connection and to the means 350 for electrical contact.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
- Connector Housings Or Holding Contact Members (AREA)
Description
La présente invention concerne une fiche électrique pour connecter deux éléments d'un câble électrique à deux broches présentant chacune un moyen de connexion, lesdites broches étant emmanchées dans deux logements aménagés dans un insert isolant, et ladite fiche étant isolée électriquement par un surmoulage extérieur.The present invention relates to an electrical plug for connecting two elements of an electrical cable with two pins each having a connection means, said pins being fitted in two housings provided in an insulating insert, and said plug being electrically insulated by an external overmolding.
L'invention trouve une application particulièrement avantageuse dans le domaine général des connecteurs, et notamment dans celui des fiches bipolaires et bipolaires + terre lorsqu'un haut degré d'isolation est recherché.The invention finds a particularly advantageous application in the general field of connectors, and in particular in that of bipolar and bipolar + earth plugs when a high degree of insulation is sought.
On connaît de l'état de la technique une fiche électrique conforme au préambule dans laquelle l'insert isolant est une pièce de matière plastique sensiblement plate. Les broches sont emmanchées dans des logements, essentiellement constitués par l'épaisseur de l'insert, et les brins dénudés des éléments du câble sont sertis, par exemple, dans des fûts de connexion des broches au débouché desdits fûts sur la face de l'insert destinée à recevoir le surmoulage d'isolement. Cette même face est pourvue de moyens de retenue en forme de crochets dans lesquels les éléments sont disposés de manière à offrir une résistance à la traction lorsque le câble est tiré brutalement.An electrical plug conforming to the preamble in which the insulating insert is a substantially flat piece of plastic is known from the prior art. The pins are fitted into housings, essentially constituted by the thickness of the insert, and the stripped strands of the elements of the cable are crimped, for example, into barrels for connecting the pins to the outlet of said barrels on the face of the insert intended to receive the isolation overmolding. This same face is provided with hook-shaped retaining means in which the elements are arranged so as to offer a tensile strength when the cable is pulled abruptly.
Toutefois, ce type de fiche électrique connue présente l'inconvénient d'une isolation électrique insuffisante vis-à-vis notamment des brins volants qui pourraient échapper des fûts de connexion et venir ainsi en contact avec le surmoulage et même l'affleurer dans le cas de brins volants particulièrement longs, ce qui n'est pas acceptable pour des raisons de sécurité.However, this type of known electrical plug has the disadvantage of an insufficient electrical insulation with respect in particular to flying strands which could escape from the connection drums and thus come into contact with the overmolding and even be flush with it. particularly long flying strands, which is not acceptable for safety reasons.
Pour résoudre cet inconvénient, la demande de brevet allemand DE-A-3 807 309 propose de munir la fiche électrique du préambule d'une coque isolante intermédiaire recouvrant l'insert et destinée à recevoir ledit surmoulage extérieur. Ainsi, la coque isolante, placée de façon intermédiaire entre l'insert et le surmoulage, empêche tout brin volant, quelle que soit sa longueur, de venir en contact avec le surmoulage. D'autre part, du fait du caractère enveloppant de la coque sur l'insert isolant, des brins volants de grande longueur ne peuvent, au pire, sortir de la fiche que par la partie avant de celle-ci, c'est-à-dire du côté des broches, endroit qui n'est pas accessible lorsque la fiche électrique est branchée.To resolve this drawback, German patent application DE-A-3 807 309 proposes to provide the electrical plug of the preamble with an intermediate insulating shell covering the insert and intended to receive said external overmolding. Thus, the insulating shell, placed intermediate between the insert and the overmolding, prevents any flying strand, whatever its length, from coming into contact with the overmolding. On the other hand, because of the enveloping nature of the shell on the insulating insert, very long flying strands cannot, at worst, leave the plug only through the front part of the plug, i.e. on the side of the pins, a location which is not accessible when the electrical plug is connected.
Il est à noter, que dans la fiche électrique décrite ci-dessus la mise en place de la coque sur l'insert oblige d'introduire une extrémité du câble à travers un trou pratiqué dans la coque, ce qui ne peut se faire que manuellement, excluant toute possibilité de montage automatique de l'assemblage.It should be noted that in the electrical plug described above, the placement of the shell on the insert requires that one end of the cable be introduced through a hole in the shell, which can only be done manually. , excluding any possibility of automatic assembly of the assembly.
Le document DE-B-1 020 078 enseigne une fiche électrique qui comprend une coque destinée à être mise en place sur un insert portant les broches reliées au câble. Cette coque comporte deux ouvertures latérales qui lorsque la coque est positionnée sur l'insert, autorise une sortie des brins volants de telle sorte qu'ils peuvent alors venir au contact du surmoulage et présenter un danger lorsque la fiche est branchée.Document DE-B-1 020 078 teaches an electrical plug which includes a shell intended to be placed on an insert carrying the pins connected to the cable. This shell has two lateral openings which, when the shell is positioned on the insert, allows the flying strands to exit so that they can then come into contact with the overmolding and present a danger when the plug is connected.
En outre, selon ce document, les ouvertures latérales de la coque, pour l'introduction sur le câble électrique, sont fermées en partie supérieure. La coque est donc mise en place sur l'insert selon un unique mouvement vertical, la paroi supérieure des ouvertures latérales venant en appui sur le câble de telle sorte que celui-ci se courbe pour passer dans celle-ci.In addition, according to this document, the lateral openings of the shell, for introduction onto the electric cable, are closed in the upper part. The shell is therefore placed on the insert in a single vertical movement, the upper wall of the lateral openings coming to bear on the cable so that it bends to pass through it.
Aussi, le problème technique à résoudre par l'objet de la présente invention est de réaliser une fiche électrique pour connecter deux éléments d'un câble électrique à deux broches présentant chacune un moyen de connexion, lesdites broches étant emmanchées dans deux logements aménagés dans un insert isolant, et ladite fiche comportant une coque isolante intermédiaire recouvrant ledit insert et destinée à recevoir un surmoulage extérieur d'isolement, fiche électrique qui permettrait une mécanisation très facile du montage de l'ensemble des pièces la constituant, et en particulier qui permettrait la mise en place automatique de la coque isolante sur l'insert, sans exercer aucune contrainte sur le câble, notamment sans le courber.Also, the technical problem to be solved by the object of the present invention is to produce an electrical plug for connecting two elements of an electrical cable with two pins each having a connection means, said pins being fitted in two housings arranged in a insulating insert, and said plug comprising an intermediate insulating shell covering said insert and intended to receive an external overmolding of insulation, electrical plug which would allow very easy mechanization of the assembly of all the parts constituting it, and in particular which would allow the automatic installation of the insulating shell on the insert, without exerting any constraint on the cable, in particular without bending it.
La solution au problème technique posé consiste, selon la présente invention, en ce que ladite coque comporte des moyens d'introduction latérale de la coque sur ledit câble constitués par une rainure latérale ouverte à ses deux extrémités de façon à permettre une mise en place de la coque isolante sur l'insert dans un mouvement latéral puis de l'amener dans un mouvement vertical sur ledit insert.The solution to the technical problem posed consists, according to the present invention, in that said shell comprises means for lateral introduction of the shell onto said cable constituted by a lateral groove open at its two ends so as to allow the establishment of the insulating shell on the insert in a lateral movement and then bring it in a vertical movement on said insert.
Ainsi, il est possible de mettre en place la coque isolante par un simple mouvement d'amenée latérale, au lieu d'avoir à l'introduire préalablement sur le câble à travers un trou de passage.Thus, it is possible to set up the insulating shell by a simple lateral feed movement, instead of having to introduce it beforehand on the cable through a through hole.
Avantageusement, ladite rainure latérale fournit des parois formant des moyens d'immobilisaion des éléments du câble dans la fiche électrique.Advantageously, said lateral groove provides walls forming means for immobilizing the elements of the cable in the electrical plug.
De cette manière, la rainure latérale assure une double fonction, celle de passage du câble à travers la coque et celle de retenue des éléments du câble.In this way, the lateral groove performs a double function, that of passing the cable through the shell and that of retaining the elements of the cable.
Il est également prévu que ladite coque isolante comporte des nervures latérales de rigidification dudit surmoulage. Par rapport à la fiche connue dans laquelle lesdites nervures sont réalisées ave l'insert, cette disposition avantageuse permet de diminuer le coût de la fiche électrique objet de l'invention puisque le matériau constituant la coque, du polypropylène par exemple, peut être nettement moins cher (3 fois environ) que celui constituant l'insert isolant (polyamide par exemple).It is also expected that said insulating shell includes lateral ribs for stiffening said overmolding. Compared to the known plug in which said ribs are made with the insert, this advantageous arrangement reduces the cost of the electrical plug object of the invention since the material constituting the shell, polypropylene for example, can be significantly cheaper (about 3 times) than that constituting the insulating insert (polyamide for example) .
La description qui va suivre en regard des dessins annexés, donnés à titre d'exemples non limitatifs, fera bien comprendre en quoi consiste l'invention et comment elle peut être réalisée.The description which follows with reference to the appended drawings, given by way of nonlimiting examples, will make it clear what the invention consists of and how it can be implemented.
La figure 1 est une vue en perspective d'un insert et d'une coque d'une fiche électrique bipolaire conforme à l'invention.Figure 1 is a perspective view of an insert and a shell of a bipolar electrical plug according to the invention.
La figure 2 est une vue en perspective, dans le sens de la flèche F1, de la coque de la figure 1.FIG. 2 is a perspective view, in the direction of arrow F1, of the shell of FIG. 1.
La figure 3 est une vue en perspective de l'assemblage constitué par l'insert et la coque de la figure 1.FIG. 3 is a perspective view of the assembly formed by the insert and the shell of FIG. 1.
La figure 4 est une vue en perspective de la fiche électrique de la figure 1 après surmoulage.Figure 4 is a perspective view of the electrical plug of Figure 1 after overmolding.
La figure 5 est une vue en coupe de l'insert d'une fiche électrique bipolaire + terre conforme à l'invention.Figure 5 is a sectional view of the insert of a bipolar electrical plug + earth according to the invention.
La figure 6 est une vue de dessous de la fiche de la figure 5.Figure 6 is a bottom view of the plug of Figure 5.
La figure 7 est une vue en coupe le long de la ligne II-II de la fiche de la figure 5.Figure 7 is a sectional view along line II-II of the sheet of Figure 5.
La figure 1 montre, en perspective, une fiche électrique du type bipolaire pour connecter deux éléments 101, 102, le neutre et la phase par exemple d'un câble électrique 100, à deux broches 201, 202 présentant chacune un moyen de connexion qui, dans le mode de réalisation de la figure 1, est, de façon non limitative, un fût 211, 212 de connexion destiné à recevoir des brins 111, 112 dénudés de l'élément 101, 102 correspondant. La fixation desdits brins 111, 112 dans les fûts 211, 212, de connexion est obtenue, dans le cas de la figure 1, par sertissage à travers les lumières 311, 312.FIG. 1 shows, in perspective, an electrical plug of the bipolar type for connecting two
Les broches 201, 202, qui peuvent être réalisées en laiton, sont emmanchées par ultrasons, surmoulage, ou tout autre moyen, dans deux logements 301, 302 aménagés dans un insert isolant 300 en polyamide moulée par exemple.The
Comme le montre la figure 1, la fiche électrique comporte une coque isolante 400 destinée à recouvrir ledit insert 300 et à recevoir un surmoulage 500, montré sur la figure 4, qui permet d'assurer l'isolement extérieur de ladite fiche. La coque 400, ainsi placée en position intermédiaire entre l'insert 300 et le surmoulage 500 d'isolement, offre une isolation électrique maximale de la fiche, notamment contre les brins volants qui pourraient s'échapper des fûts 211, 212 de connexion. Ainsi qu'on peut s'en rendre compte sur la figure 3, le caractère enveloppant de la coque 400 a pour avantage d'obliger des brins volants particulièrement longs à sortir de la fiche du côté des broches, à un endroit où, compte tenu du surmoulage, ils ne présentent pas de danger lorsque la fiche est branchée.As shown in FIG. 1, the electrical plug comprises an
D'autre part, comme on peut le voir sur les figures 1, 2 et 3, la coque isolante 400 comporte des nervures latérales 401, 402 de rigidification du surmoulage d'isolement, ce qui permet de diminuer le prix de revient de la fiche, le matériau constituant la coque, du polypropylène par exemple, étant en effet moins cher que la polyamide de l'insert dans laquelle sont habituellement réalisées lesdites nervures de rigidification.On the other hand, as can be seen in FIGS. 1, 2 and 3, the
La figure 1 montre également que l'insert isolant 300 comporte un évidement 320 limité par deux cloisons latérales 331, 332 et à l'intérieur duquel sont logés les éléments 101, 102 du câble 100 dans leur partie comprise entre le câble et les fûts de connexion. Par ailleurs, la coque isolante 400 dispose de parois 421, 422 qui viennent en appui contre lesdites cloisons latérales 331, 332 lorsque la coque est mise en place sur l'insert. Ainsi, les parois 421, 422, agissant en tant que moyens d'immobilisation, forment avec l'évidement 320 des moyens de retenue en chicane vis-à-vis des éléments 101, 102. Ce système de chicane permet de préserver totalement les connexions en assurant l'immobilisation des éléments lors d'une traction brutale du câble.Figure 1 also shows that the
On peut noter sur les figures 1 et 2 que la coque 400 comporte des moyens d'introduction latérale de ladite coque sur ledit câble 100. Dans l'exemple représenté, lesdits moyens d'introduction latérale sont constitués par une rainure latérale formée par les deux parois 421, 422 et une troisième paroi 423. La coque peut être alors mise en place très facilement, il suffit pour cela de la présenter sur le câble dans un mouvement latéral illustré par la flèche F1 de la figure 1, puis de l'amener, selon la flèche F2, sur l'insert 300 jusque dans sa position définitive.It can be noted in FIGS. 1 and 2 that the
Ainsi, à l'aide de deux mouvements très simples, on peut tout à la fois mettre en place la coque sur l'insert, faire passer le câble à travers la coque et réaliser l'immobilisation des éléments du câble. Il en résulte une automatisation très aisée du montage de la fiche électrique.Thus, using two very simple movements, it is possible at the same time to place the shell on the insert, to pass the cable through the shell and to immobilize the elements of the cable. This results in very easy automation of the assembly of the electrical plug.
Il convient de noter que la rainure latérale fournit à la fois les moyens d'introduction de la coque sur le câble et les parois des moyens d'immobilisation.It should be noted that the lateral groove provides both the means for introducing the shell onto the cable and the walls of the immobilization means.
Après avoir été mise en place sur l'insert 300, la coque isolante 400 est maintenue à l'aide de moyens de fixation qui sont constitués par deux ergots 330 de fixation disposés de part et d'autre de l'insert 300, un desdits ergots coopérant avec une fente 410 qui, comme l'indique la figure 2, est aménagée dans ladite coque sur la paroi 423 de la rainure latérale. L'introduction dudit ergot dans la fente 410 est réalisée par déformation élastique de la coque, celle-ci reprenant sa forme initiale lorsque l'ergot 330 est engagé dans ladite fente. La présence de deux ergots, dont un seul est effectivement utilisé, permet d'introduire la coque sur l'insert dans n'importe quel sens, augmentant ainsi la facilité d'assemblage de la fiche.After having been put in place on the
Les figures 5 et 6 montrent une variante de réalisation de la fiche électrique décrite précédemment en regard des figures 1 à 4, destinée à la connexion d'un câble 100 comprenant, outre la phase et le neutre 101, 102, un élément 103 de mise à la terre. Conformément à la figure 5, l'insert isolant 300 comporte également un troisième logement 303 dans lequel est disposé un moyen 350 de contact électrique en forme de fût, débouchant à l'extérieur de l'insert par un moyen 360 de fixation, un rivet par exemple, à un rail 600 de terre. Le brin 113 de l'élément 103 de mise à la terre est serti dans le fût 350, à travers une lumière non représentée, équivalente aux lumières 311, 312 de la figure 1. Il est bien entendu que, dans le cas de la figure 5, l'insert 300 comporte deux évidements 321, 322 distincts destinés à loger respectivement les éléments 101 et 102.Figures 5 and 6 show an alternative embodiment of the electrical plug described above with reference to Figures 1 to 4, for the connection of a
La vue de dessous, représentée à la figure 6, montre la disposition du rail 600 de terre par rapport à l'insert 300 et au surmoulage 500 lorsque la fiche électrique est complètement assemblée.The bottom view, shown in Figure 6, shows the arrangement of the
Selon une caractéristique avantageuse de l'invention, il est prévu que les trois éléments 101, 102, 103, phase, neutre et mise à la terre, ont une longueur identique de sorte qu'au montage, du fait du glissement de la coque sur l'insert et du blocage des éléments phase et neutre par lesdites chicanes, l'élément 103 de mise à la terre présente une surlongueur, ou brin mou, de sécurité, ainsi que l'illustre la figure 7. Une traction brutale sur le câble 100 induit la rupture d'au moins un des éléments phase ou neutre avant l'élément de mise à la terre.According to an advantageous characteristic of the invention, it is provided that the three
Enfin, de façon à faciliter le montage de la fiche, et comme le montrent les figures 1 et 5, l'insert isolant 300 comporte des moyens d'introduction, constitués par des cônes 341, 342, 343, permettant d'introduire les éléments 101, 102, 103 du câble 100 vis-à-vis respectivement des moyens 301, 302 de connexion et des moyens 350 de contact électrique.Finally, in order to facilitate the mounting of the plug, and as shown in FIGS. 1 and 5, the
Claims (12)
- An electrical plug for connecting two cores (101, 102) of an electrical cable (100) to two pins (201, 202) each having respective connection means (211, 212), said pins being received in two housings (301, 302) formed in an insulating insert (300), and said plug also including an intermediate insulating shell (400) covering said insert (300) and designed to receive an external molding of insulation (500), said insulating shell (400) being suitable for preventing any loose strand, whatever its length, from coming into contact with the outer molding (500) and for constraining at least any loose strands of great length to exit the plug at the pin end at a location where, given the outer molding, they do not present any danger when the plug is plugged in, characterized in that said shell includes means for engaging the shell (400) laterally onto said cable (100), which means are constituted by a lateral groove (421, 422, 423) that is open at both ends so as to enable the insulating shell (400) to be placed on the insert (300) by being moved laterally and then to be brought longitudinally against said insert (300).
- An electrical plug according to claim 1, characterized in that said insulating shell (400) includes lateral ribs (401, 402) for stiffening said outer molding (500).
- An electrical plug according to claim 1 or 2, characterized in that said insulating insert (300) includes at least one recess (320, 321, 322) defined by two lateral partitions (331, 332) and within which there are received those portions of the cable cores (101, 102) that extend between said cable (100) and said connection means (211, 212), and in that the insulating shell (400) has locking means (421, 422) co-operating with said recess (320, 321, 322) to form zigzag retaining means for said elements.
- An electrical plug according to claim 3, characterized in that said locking means are walls (421, 422) bearing against said lateral partitions (331, 332) of the recess (320, 321, 322) when the shell (400) is put into place on said insert (300).
- An electrical plug according to any one of claims 1 to 4, characterized in that said insulating insert (300) includes two means (341, 342) for inserting cable cores relative to the connection means (211. 212).
- An electrical plug according to claims 3 and 4, characterized in that said lateral groove provides said walls (421, 422) forming said locking means.
- An electrical plug according to any one of claims 1 to 6, characterized in that the shell (400) is held on the insert (300) by complementary fixing means (330, 410) provided respectively on the shell and on the insert.
- An electrical plug according to any one of claims 2 to 7, characterized in that said complementary fixing means are constituted by at least one fixing projection (330) disposed on the insulating insert (300) and co-operating with a slot (410) formed in said shell (400).
- An electrical plug according to any one of claims 1 to 8, characterized in that the cable (100) has an "earth" third core (103), said insert (300) also including a third housing (303) containing electrical contact means (350), opening to the outside of the insert (300) via earth rail fixing means (360) for fixing to an earth rail (600), and having said earth core (103) connected thereto.
- An electrical plug according to claim 9, characterized in that said insulating insert (300) includes third means (343) for inserting the earth core 103 facing the electrical contact means (350).
- An electrical plug according to claim 9 or 10, characterized in that the cores (101, 102, 103) are of identical length so that, on assembly, the earth core (103) has extra length or slack for safety purposes.
- An electrical plug according to claim 5 and any one of claims 1, 6, 7, 8, 10, 11, and 12, characterized in that said insertion means are insertion cones (341, 342, 343).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9014932 | 1990-11-29 | ||
| FR9014932A FR2670056B1 (en) | 1990-11-29 | 1990-11-29 | ELECTRICAL PLUG WITH DOUBLE INSULATION. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0488896A1 EP0488896A1 (en) | 1992-06-03 |
| EP0488896B1 true EP0488896B1 (en) | 1996-07-03 |
Family
ID=9402717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19910403226 Expired - Lifetime EP0488896B1 (en) | 1990-11-29 | 1991-11-28 | Double insulated electrical plug |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0488896B1 (en) |
| DE (1) | DE69120641T2 (en) |
| ES (1) | ES2090277T3 (en) |
| FR (1) | FR2670056B1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1020078B (en) * | 1956-01-28 | 1957-11-28 | Isoplast G M B H | Electrical plug |
| DE2532872C3 (en) * | 1975-07-23 | 1979-11-15 | Kabelwerke Reinshagen Gmbh, 5600 Wuppertal | Electrical connector and process for their manufacture |
| DE3202747C3 (en) * | 1982-01-28 | 1995-03-23 | Krups Fa Robert | Power plug |
| GB2140222B (en) * | 1983-05-20 | 1986-06-25 | Philips Electronic Associated | Method of manufacturing a domestic moulded-on mains plug |
| DE3807309A1 (en) * | 1988-03-05 | 1989-09-07 | Taller Gmbh | Two-pole protective-earth contact plug (Europlug, German standard two-pin plug) |
-
1990
- 1990-11-29 FR FR9014932A patent/FR2670056B1/en not_active Expired - Fee Related
-
1991
- 1991-11-28 DE DE1991620641 patent/DE69120641T2/en not_active Expired - Lifetime
- 1991-11-28 EP EP19910403226 patent/EP0488896B1/en not_active Expired - Lifetime
- 1991-11-28 ES ES91403226T patent/ES2090277T3/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE69120641T2 (en) | 1997-02-06 |
| FR2670056A1 (en) | 1992-06-05 |
| FR2670056B1 (en) | 1995-03-24 |
| DE69120641D1 (en) | 1996-08-08 |
| ES2090277T3 (en) | 1996-10-16 |
| EP0488896A1 (en) | 1992-06-03 |
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