EP0718915B1 - Connection element having an insulation displacing slot, in particular for telephone or data terminal blocks, its process of making and terminal block comprising at least one such connection element - Google Patents

Connection element having an insulation displacing slot, in particular for telephone or data terminal blocks, its process of making and terminal block comprising at least one such connection element Download PDF

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Publication number
EP0718915B1
EP0718915B1 EP95420359A EP95420359A EP0718915B1 EP 0718915 B1 EP0718915 B1 EP 0718915B1 EP 95420359 A EP95420359 A EP 95420359A EP 95420359 A EP95420359 A EP 95420359A EP 0718915 B1 EP0718915 B1 EP 0718915B1
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EP
European Patent Office
Prior art keywords
slot
wire
band
plane
thicknesses
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EP95420359A
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German (de)
French (fr)
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EP0718915A1 (en
Inventor
Jean-Pierre Letailleur
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Pouyet SA
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Pouyet SA
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Publication date
Application filed by Pouyet SA filed Critical Pouyet SA
Priority to AT95420359T priority Critical patent/ATE155615T1/en
Priority to DK95420359.2T priority patent/DK0718915T3/en
Priority to EP95420359A priority patent/EP0718915B1/en
Priority to DE69500444T priority patent/DE69500444T2/en
Priority to ES95420359T priority patent/ES2105858T3/en
Publication of EP0718915A1 publication Critical patent/EP0718915A1/en
Application granted granted Critical
Publication of EP0718915B1 publication Critical patent/EP0718915B1/en
Priority to GR970402357T priority patent/GR3024713T3/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
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
    • H01R4/2416—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type
    • H01R4/2445—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type the contact members having additional means acting on the insulation or the wire, e.g. additional insulation penetrating means, strain relief means or wire cutting knives
    • H01R4/2462—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type the contact members having additional means acting on the insulation or the wire, e.g. additional insulation penetrating means, strain relief means or wire cutting knives the contact members being in a slotted bent configuration, e.g. slotted bight

Definitions

  • connection member with an insulation displacement slot, in particular for interconnecting strip for telephone or computer lines, as well as to the method of manufacturing this connection member. It also relates to a strip comprising at least one such connection member.
  • Connection members or "contacts" of this type are well known in the art. They are generally flat and they comprise at least one longitudinal slit for insulation displacement connection of a strand of wire which has a metallic core surrounded by an insulating sheath.
  • the contact concerned by the present invention is a contact which comprises at least two thicknesses, obtained for example from a flat and elongated metallic element which is folded back at least once.
  • sheathed wires known as “single-stranded” wires, that is to say comprising a conductive core which consists of a single metal wire, the latter being made of a rather soft material such as copper. annealed. They make it possible to connect single-strand wires, the core of which may have a section which varies from a single to double a wire to another and, whatever the case, the strength of retention of the connected wire is excellent.
  • Multi-strand threads which consist of a twist of several flexible and very fine threads.
  • a multi-strand wire whose core has a diameter of 0.6 millimeters, has this core constituted by seven twisted wires, the diameter of each of these seven wires being 0.15 millimeters.
  • the twisted core changes section, passing from a circular section to a roughly oval section due to the consequent reorganization of the multiple strands of twisted wire.
  • the retention force due to the core of the multi-strand wire is then very low, much weaker in any case than that of the core, then stamped in its self-stripping receiving slot, of the single-strand wire of the same section.
  • the portion of sheath which is not sectioned, at the location of the insulation displacement gap, does indeed ensure a certain retention of the wire in the slot, but this retention is largely insufficient.
  • the insulation displacement contacts for multi-strand wires which are currently used include special devices, such as guides and a cover, which make it possible to obtain sufficient retention of the wire in its receiving insulation displacement slot. These devices are complex and therefore necessarily expensive.
  • the object of the invention which is to remedy these drawbacks, is to provide an insulation displacement contact obtained from at least one flat and elongated metallic element, this contact comprising at least two thicknesses and being suitable, without being necessary to use additional devices such as guides or a cover, interconnect either a multi-strand wire or a single-core wire of substantially the same diameter as that of this multi-strand wire.
  • the invention also relates to a strip for interconnection of telephone or computer lines, this strip comprising at least one connection member of the type aforementioned and being characterized in that the plastic wall of the body of the strip which receives the insulation displacement contact comprises, in line with the contact, a thread passage slot which is narrower than the diameter of the sheath of this thread, while by being wider than the core of this wire, so that this wire is pinched, once introduced into the contact, in this slot.
  • connection "U" 1 intended to be conventionally incorporated, as described for example in European Patent Application No. 95420295.8 above, in an interconnection strip of telephone or computer lines.
  • the two insulation displacement contacts 2 and 3 which equip this U-shaped connection, however, have the particularity of being contacts in accordance with the present invention.
  • Connection 1 is made from a metal strip.
  • FIG. 1 shows this metal strip 4 flat, as it is cut and stamped before the folding operations which will ultimately make it possible to obtain the U-shaped connection of FIG. 4.
  • the two slots 5 and 6 are symmetrical to one another with respect to the transverse plane of symmetry 7 of the piece of strip 4.
  • the two slots 52 and 62 are slightly wider than the two slots 51 and 61.
  • the width of the slots 52 and 62 is 0.30 mm, while that of the thinner slots 51 and 61 is 0.25 mm.
  • the dimensions of the lights 5 and 6 are chosen on the one hand so that, after folding to 180 degrees around a respective transverse axis 53,63 which delimits the classic future input chamfer 54,64 of the slots the widest 52 and 62, the entry chamfers 55,65 of the thinnest slots 51 and 61 come back with respect to the entry chamfers 54,64, and on the other hand so that, after this same folding at 180 degrees, the free end of the fine slot 51,61 arrives at the same place as the free end of the wider slot 52,62.
  • each insulation displacement contact is presented as shown in FIGS. 2 and 3.
  • this contact 2 comprises ( conventionally) two adjoining thicknesses 8 and 9 fitted with two "V" shaped chamfers 55 and 54, themselves followed by the insulation displacement connection slots 51 and 52 forming together the insulation displacement connection slot for this contact 2.
  • the two thicknesses 8 and 9 delimit between them a space E ( Figure 3) whose section, in the cutting plane of FIG. 3, that is to say in the plane P orthogonal to the Y axis (FIG. 2) of contact 2, has the shape of an isosceles triangle whose angle at the apex A is an obtuse angle which is a little less 180 degrees.
  • This triangle is symmetrical with respect to the plane P 'passing through the insulation displacement gap 51, 52 and orthogonal to the aforementioned plane P.
  • the two end contacts 2 and 3 are thus produced by block folding back the strip 4 around the axes 53 and 63. This folding is carried out while respecting the symmetry with respect to the plane 7. It is carried out in the direction of the needles d 'a watch around the axis 53, and in the opposite direction around the axis 63, as indicated by the arrows in Figure 1.
  • the strictly flat thickness 8 has the thinnest slot 51, while the curved thickness 9 has the widest slot 52.
  • the latter is also a little wider than the slot 52 which had been cut out at the origin, this increase in width being due of course to the stamping operation.
  • the slot 52 originally has a width of 0.3 mm, it has a width of between 0.3 and 0.4 mm after the stamping operation.
  • the strip 4 is then folded twice at 90 degrees to obtain the U-shaped connection shown in FIG. 4.
  • the inlet chamfers 55,65 of the two thinnest slots 51,61 are set back with respect to the respective inlet chamfers 54,64 of the two wider slots corresponding 52,62, and that it is the same for these thinner slots 51,61 which are set back with respect to their wider slots respectively associated 52,62.
  • the wire introduced from top to bottom will first be treated by the "upper” chamfer 54,64 and the beginning of the "wide” slit 52,62, then it will be treated by the "lower” chamfer 55,65 and the "fine” slot 51.61.
  • FIG. 6 clearly shows the result obtained after the introduction of a wire 10 with insulating sheath 11 and multi-strand core 12 into the insulation displacement slot 51, 52 of a insulation displacement connection member in accordance with the invention.
  • a piece of sheath 13 is then strongly compressed, and therefore packed, in the triangular space E formed, in accordance with the invention, between the two adjoining thicknesses 8 and 9 of the insulation displacement contact.
  • This piece of compressed sheath then ensures excellent retention of the wire 10 in the slot 51, 52 of the insulation displacement contact, an effect of elasticity of the convex thickness 9 further reinforcing this retention.
  • the plastic wall 14 of the body of the strip which receives the insulation displacement contact 2 comprises, in line with the contact 2, a slot 15 for passage of the wire 10 which is narrower than the diameter of the sheath 11 of this wire 10, while being wider than the core 12 of this wire 10, so that this wire 10 is pinched, once introduced into contact 2, in this slot 15.
  • edges 16, 17 of this slot 15 are cut in a bevel so as to better penetrate, by pinching it, in the sheath 11 of the wire 10.
  • connection member could comprise two insertion slots of 2 separate strands instead of only one. This is also how it could have more than two thicknesses, etc.

Landscapes

  • Multi-Conductor Connections (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)

Abstract

The insulation displacement connection element is formed from at least two thicknesses of metal (8,9) formed initially from a single metal band. This is folded into a block. At least one of the thickness of metal (8,9) is curved (E) out of its normal plane. A slot is cut through the curved section defining an insulation displacement channel (52) into which a cable may be inserted. The cable is gripped by each metal band, so that the conductor is held at two points. The curvature of one of the metal bands ensures that the two grip points are spaced along the length of the wire.

Description

La présente invention se rapporte à un organe de connexion a fente autodénudante, en particulier pour réglette d'interconnexion de lignes téléphoniques ou informatiques, ainsi qu'au procédé de fabrication de cet organe de connexion. Elle se rapporte aussi à une réglette comportant au moins un tel organe de connexion.The present invention relates to a connection member with an insulation displacement slot, in particular for interconnecting strip for telephone or computer lines, as well as to the method of manufacturing this connection member. It also relates to a strip comprising at least one such connection member.

Des organes de connexion, ou "contacts", de ce type sont bien connus dans la technique. Ils sont en général plats et ils comportent au moins une fente longitudinale de connexion autodénudante d'un brin de fil qui possède une âme métallique entourée d'une gaine isolante.Connection members, or "contacts", of this type are well known in the art. They are generally flat and they comprise at least one longitudinal slit for insulation displacement connection of a strand of wire which has a metallic core surrounded by an insulating sheath.

Comme état de la technique peuvent être cités les documents US-A- 3 854 114, FR-A-2.330.159 et FR-A-2.426.345 ainsi que, en ce qui concerne une réglette munie de tels contacts autodénudants, les documents FR-A-2.495.847, FR-A-2.662.042, EP-A-514.115, et la demande de Brevet Européen n° 95420295.8 déposée le 26 Octobre 1995 par la Société Demanderesse.As the state of the art, the documents US-A-3,854,114, FR-A-2,330,159 and FR-A-2,426,345 may be cited, as well as, with regard to a strip fitted with such insulation displacement contacts, FR-A-2,495,847, FR-A-2,662,042, EP-A-514,115, and the European Patent application n ° 95420295.8 filed on October 26, 1995 by the Applicant Company.

Plus particulièrement, le contact concerné par la présente invention est un contact qui comporte au moins deux épaisseurs, obtenues par exemple à partir d'un élément métallique plat et longiligne qui est replié à bloc au moins une fois.More particularly, the contact concerned by the present invention is a contact which comprises at least two thicknesses, obtained for example from a flat and elongated metallic element which is folded back at least once.

Ces contacts autodénudants conviennent parfaitement bien pour la connexion de fils gainés dits "monobrins", c'est-à-dire comportant une âme conductrice qui est constituée d'un seul fil métallique, ce dernier étant en une matière plutôt molle telle que du Cuivre recuit. Ils permettent de connecter des fils monobrins dont l'âme peut avoir une section qui varie du simple au double d'un fil à l'autre et, quoiqu'il en soit, la force de rétention du fil connecté est excellente.These insulation displacement contacts are perfectly suited for the connection of sheathed wires known as “single-stranded” wires, that is to say comprising a conductive core which consists of a single metal wire, the latter being made of a rather soft material such as copper. annealed. They make it possible to connect single-strand wires, the core of which may have a section which varies from a single to double a wire to another and, whatever the case, the strength of retention of the connected wire is excellent.

Les fils monobrins ont cependant pour inconvénient de n'être pas des fils souples, de sorte qu'ils sont maintenant quelquefois remplacés par des fils "multibrins" qui sont constitués par une torsade de plusieurs fils souples et très fins. Par exemple, un fil multibrins dont l'âme a un diamètre de 0,6 millimètres, a cette âme constituée par sept fils torsadés, le diamètre de chacun de ces sept fils étant de 0,15 millimètres.Single-strand threads, however, have the drawback of not being flexible threads, so that they are now sometimes replaced by "multi-strand" threads which consist of a twist of several flexible and very fine threads. For example, a multi-strand wire whose core has a diameter of 0.6 millimeters, has this core constituted by seven twisted wires, the diameter of each of these seven wires being 0.15 millimeters.

Pour connecter ces fils multibrins, il faut utiliser des contacts autodénudants dont la fente de connexion autodénudante a une largeur bien définie. Une fente trop fine viendrait en effet couper quelques brins, ce qui ne serait pas admissible.To connect these multi-strand wires, use insulation displacement contacts whose insulation displacement connection slot has a well-defined width. A too thin slit would indeed cut a few strands, which would not be admissible.

Lors de l'introduction du fil multibrins dans la fente autodénudante, l'âme torsadée change de section, passant d'une section circulaire à une section grossièrement ovale en raison de la réorganisation conséquente des multiples brins de fil torsadés. La force de rétention due à l'âme du fil multibrins est alors très faible, bien plus faible en tous cas que celle de l'âme, alors matricée dans sa fente autodénudante réceptrice, du fil monobrin de même section.When introducing the multi-stranded wire into the insulation displacement slot, the twisted core changes section, passing from a circular section to a roughly oval section due to the consequent reorganization of the multiple strands of twisted wire. The retention force due to the core of the multi-strand wire is then very low, much weaker in any case than that of the core, then stamped in its self-stripping receiving slot, of the single-strand wire of the same section.

La portion de gaine qui n'est pas sectionnée, à l'endroit de la fente autodénudante, assure bien une certaine rétention du fil dans la fente, mais cette rétention est largement insuffisante. C'est pourquoi les contacts autodénudants pour fils multibrins qui sont utilisés à l'heure actuelle comportent des dispositifs spéciaux, tels que des guides et un capotage, qui permettent d'obtenir une rétention suffisante du fil dans sa fente autodénudante réceptrice. Ces dispositifs sont complexes et donc nécessairement onéreux.The portion of sheath which is not sectioned, at the location of the insulation displacement gap, does indeed ensure a certain retention of the wire in the slot, but this retention is largely insufficient. This is why the insulation displacement contacts for multi-strand wires which are currently used include special devices, such as guides and a cover, which make it possible to obtain sufficient retention of the wire in its receiving insulation displacement slot. These devices are complex and therefore necessarily expensive.

L'invention, qui vise à remédier à ces inconvénients, a pour objet de proposer un contact autodénudant obtenu à partir d'au moins un élément métallique plat et longiligne, ce contact comportant au moins deux épaisseurs et étant apte, sans qu'il soit nécessaire d'utiliser des dispositifs complémentaires tels que des guides ou un capotage, de connecter indifféremment soit un fil multibrins soit un fil monobrin d'âme de sensiblement même diamètre que celle de ce fil multibrins.The object of the invention, which is to remedy these drawbacks, is to provide an insulation displacement contact obtained from at least one flat and elongated metallic element, this contact comprising at least two thicknesses and being suitable, without being necessary to use additional devices such as guides or a cover, interconnect either a multi-strand wire or a single-core wire of substantially the same diameter as that of this multi-strand wire.

Elle se rapporte à cet effet à un organe de connexion à au moins une fente autodénudante tel que defini dans la revendication 1.To this end, it relates to a member for connection to at least one insulation displacement slot as defined in claim 1.

L'invention se rapporte aussi à un procédé de fabrication de cet organe de connexion,
caractérisé en ce qu'il consiste au moins, à partir d'une bande métallique plane :

  • à découper dans cette bande métallique au moins une lumière axiale comportant deux fentes axiales d'extrémité séparées par une partie centrale élargie,
  • à emboutir cette bande à l'endroit d'au moins une de ces deux fentes d'extrémité,
  • et à replier à bloc au moins une fois cette bande en au moins deux épaisseurs le long d'une ligne orthogonale à l'axe de la bande, passant par cette partie centrale élargie, et choisie de façon à faire coincider ces deux fentes d'extrémité, cette bande étant repliée dans un sens qui permet de finalement délimiter, entre les deux épaisseurs repliées à bloc, ledit espace dont la section a une forme de triangle.
The invention also relates to a method of manufacturing this connection member,
characterized in that it consists at least, from a flat metal strip:
  • cutting at least one axial slot in this metal strip comprising two axial end slots separated by an enlarged central part,
  • stamping this strip at the location of at least one of these two end slots,
  • and to fold back this block at least once in at least two thicknesses along a line orthogonal to the axis of the strip, passing through this enlarged central part, and chosen so as to make these two slots coincide. end, this strip being folded in a direction which makes it possible finally to delimit, between the two thicknesses folded to the block, said space whose section has the shape of a triangle.

L'invention se rapporte aussi à une réglette d'interconnexion de lignes téléphoniques ou informatiques, cette réglette comportant au moins un organe de connexion du type précité et étant caractérisée en ce que la paroi en matière plastique du corps de la réglette qui reçoit le contact autodénudant comporte, au droit du contact, une fente de passage du fil qui est plus étroite que le diamètre de la gaine de ce fil, tout en étant plus large que l'âme de ce fil, de sorte que ce fil se trouve pincé, une fois introduit dans le contact, dans cette fente.The invention also relates to a strip for interconnection of telephone or computer lines, this strip comprising at least one connection member of the type aforementioned and being characterized in that the plastic wall of the body of the strip which receives the insulation displacement contact comprises, in line with the contact, a thread passage slot which is narrower than the diameter of the sheath of this thread, while by being wider than the core of this wire, so that this wire is pinched, once introduced into the contact, in this slot.

De toute façon, l'invention sera bien comprise, et ses avantages et diverses caractéristiques ressortiront mieux, lors de la description suivante d'un exemple non-limitatif de réalisation, en référence au dessin schématique annexé dans lequel :

  • . Figure 1 montre la bande métallique plane, découpée et emboutie en vue de la réalisation d'une liaison "en U" comportant deux contacts autodénudants conforme à l'invention et destinée à équiper, avec plusieurs autres liaisons identiques, une réglette d'interconnexion de lignes téléphoniques ou informatiques.
  • . Figure 2 montre un des contacts autodénudants, obtenus après pliage à bloc d'une des deux extrémités de cette bande métallique.
  • . Figure 3 est une vue en coupe de ce même contact autodénudant, selon III-III de Figure 2.
  • . Figure 4 est une vue en perspective de la liaison en U finalement obtenue.
  • . Figure 5 est une vue de détail, sous un autre angle, de la liaison en U de la figure 4.
  • . Figure 6 est une vue en coupe, semblable à Figure 3 et montrant un fil multibrins connecté dans ce contact autodénudant après installation de celui-ci dans la réglette.
In any case, the invention will be well understood, and its advantages and various characteristics will emerge more clearly from the following description of a non-limiting exemplary embodiment, with reference to the appended schematic drawing in which:
  • . Figure 1 shows the flat metal strip, cut and stamped for the realization of a "U" connection comprising two insulation displacement contacts according to the invention and intended to equip, with several other identical connections, an interconnection strip of telephone or computer lines.
  • . Figure 2 shows one of the insulation displacement contacts, obtained after block folding of one of the two ends of this metal strip.
  • . Figure 3 is a sectional view of the same insulation displacement contact, according to III-III of Figure 2.
  • . Figure 4 is a perspective view of the U-shaped connection finally obtained.
  • . Figure 5 is a detail view, from another angle, of the U-shaped connection of Figure 4.
  • . Figure 6 is a sectional view, similar to Figure 3 and showing a multi-strand wire connected in this insulation displacement contact after installation thereof in the strip.

En se référant tout d'abord à la figure 4, il est représenté une liaison "en U" 1 destinée à être classiquement incorporée, comme décrit par exemple dans la demande de Brevet Européen n° 95420295.8 précitée, dans une réglette d'interconnexion de lignes téléphoniques ou informatiques. Les deux contacts autodénudants 2 et 3 qui équipent cette liaison en U ont cependant la particularité d'être des contacts conformes à la présente invention.Referring first to Figure 4, there is shown a connection "U" 1 intended to be conventionally incorporated, as described for example in European Patent Application No. 95420295.8 above, in an interconnection strip of telephone or computer lines. The two insulation displacement contacts 2 and 3 which equip this U-shaped connection, however, have the particularity of being contacts in accordance with the present invention.

La liaison 1 est réalisée à partir d'une bande métallique. La figure 1, à laquelle on se reportera maintenant, montre cette bande métallique 4 à plat, telle qu'elle est découpée et emboutie avant les opérations de pliage qui permettront d'obtenir finalement la liaison en U de la figure 4.Connection 1 is made from a metal strip. FIG. 1, to which reference will now be made, shows this metal strip 4 flat, as it is cut and stamped before the folding operations which will ultimately make it possible to obtain the U-shaped connection of FIG. 4.

Dans cette bande 4 ont été découpées, à chacune de ses deux extrémités, deux lumières 5 et 6, comportant chacune deux fentes axiales d'extrémité, respectivement 51,52 et 61,62, séparées par une partie centrale élargie, respectivement 50 et 60.In this strip 4 were cut, at each of its two ends, two slots 5 and 6, each comprising two axial end slots, respectively 51.52 and 61.62, separated by an enlarged central part, respectively 50 and 60 .

Les deux lumières 5 et 6 sont symétriques l'une de l'autre par rapport au plan transversal de symétrie 7 du morceau de bande 4. Les deux fentes 52 et 62 sont un peu plus larges que les deux fentes 51 et 61. Par exemple, pour des fils, monobrins ou multibrins, à raccorder ultérieurement et dont l'âme a un diamètre de 0,6 mm, la largeur des fentes 52 et 62 est de 0,30 mm, tandis que celle des fentes, plus fines, 51 et 61 est de 0,25 mm.The two slots 5 and 6 are symmetrical to one another with respect to the transverse plane of symmetry 7 of the piece of strip 4. The two slots 52 and 62 are slightly wider than the two slots 51 and 61. For example , for wires, single-strand or multi-strand, to be connected later and whose core has a diameter of 0.6 mm, the width of the slots 52 and 62 is 0.30 mm, while that of the thinner slots 51 and 61 is 0.25 mm.

En outre, les dimensions des lumières 5 et 6 sont choisies d'une part de sorte, qu'après pliage à 180 degrés autour d'un axe transversal respectif 53,63 qui délimite le classique futur chanfrein d'entrée 54,64 des fentes les plus larges 52 et 62, les chanfreins d'entrée 55,65 des fentes les plus fines 51 et 61 arrivent en retrait par rapport aux chanfreins d'entrée 54,64, et d'autre part de sorte que, après ce même pliage à 180 degrés, l'extrémité libre de la fente fine 51,61 arrive au même endroit que l'extrémité libre de la fente plus large 52,62.In addition, the dimensions of the lights 5 and 6 are chosen on the one hand so that, after folding to 180 degrees around a respective transverse axis 53,63 which delimits the classic future input chamfer 54,64 of the slots the widest 52 and 62, the entry chamfers 55,65 of the thinnest slots 51 and 61 come back with respect to the entry chamfers 54,64, and on the other hand so that, after this same folding at 180 degrees, the free end of the fine slot 51,61 arrives at the same place as the free end of the wider slot 52,62.

Tout ce qui vient d'être décrit au sujet de ces deux lumières 5 et 6 est bien connu, car utilisé depuis longtemps par la Société Demanderesse pour la confection de ses contacts autodénudants classiques.Everything that has just been described about these two lights 5 and 6 is well known, since it has been used for a long time by the Applicant Company for making its conventional insulation displacement contacts.

Ce qui est nouveau en revanche est que l'on vient frapper, et donc emboutir, avant de réaliser les divers pliages, la bande 4 à l'endroit des deux fentes les plus larges 52 et 62, comme représenté par les emboutis 56 et 66 sur la figure 1.What is new, on the other hand, is that one strikes, and therefore stamps, before carrying out the various folds, the strip 4 at the location of the two widest slots 52 and 62, as shown by the stampings 56 and 66 in figure 1.

En conséquence, après repliage de la bande 4 à 180 degrés, autour de l'axe 53 ou autour de l'axe 63, chaque contact autodénudant se présente comme représenté en Figures 2 et 3.Consequently, after folding the strip 4 at 180 degrees, around the axis 53 or around the axis 63, each insulation displacement contact is presented as shown in FIGS. 2 and 3.

En supposant qu'il s'agisse, sur ces figures 2 et 3, du contact 2 issu de la lumière 5 et de son embouti 56 après pliage à 180 degrés de la bande 4 autour de l'axe 53, ce contact 2 comporte (classiquement) deux épaisseurs accolées 8 et 9 garnies de deux chanfreins d'entrée en "V" 55 et 54, eux-même suivis des fentes de connexion autodénudante 51 et 52 formant à elles deux la fente de connexion autodénudante de ce contact 2.Assuming that these figures 2 and 3 are contact 2 coming from light 5 and its stamping 56 after 180 ° folding of the strip 4 around the axis 53, this contact 2 comprises ( conventionally) two adjoining thicknesses 8 and 9 fitted with two "V" shaped chamfers 55 and 54, themselves followed by the insulation displacement connection slots 51 and 52 forming together the insulation displacement connection slot for this contact 2.

Au lieu d'être plaquées intimement l'une contre l'autre comme pour les contacts de l'Art Antérieur, les deux épaisseurs 8 et 9 délimitent entre elles un espace E (Figure 3) dont la section, dans le plan de coupe de la figure 3 c'est-à-dire dans le plan P orthogonal à l'axe Y (Figure 2) du contact 2, a une forme de triangle isocèle dont l'angle au sommet A est un angle obtus qui est un peu inférieur à 180 degrés. Ce triangle est symétrique par rapport au plan P' passant par la fente autodénudante 51,52 et orthogonal au plan P précité.Instead of being pressed tightly against each other as for the contacts of the Prior Art, the two thicknesses 8 and 9 delimit between them a space E (Figure 3) whose section, in the cutting plane of FIG. 3, that is to say in the plane P orthogonal to the Y axis (FIG. 2) of contact 2, has the shape of an isosceles triangle whose angle at the apex A is an obtuse angle which is a little less 180 degrees. This triangle is symmetrical with respect to the plane P 'passing through the insulation displacement gap 51, 52 and orthogonal to the aforementioned plane P.

Les deux contacts d'extrémité 2 et 3 sont ainsi réalisés par repliage à bloc de la bande 4 autour des axes 53 et 63. Ce repliage est réalisé en respectant la symétrie par rapport au plan 7. Il est réalisé dans le sens des aiguilles d'une montre autour de l'axe 53, et dans le sens inverse autour de l'axe 63, comme il est indiqué par les flèches sur la figure 1.The two end contacts 2 and 3 are thus produced by block folding back the strip 4 around the axes 53 and 63. This folding is carried out while respecting the symmetry with respect to the plane 7. It is carried out in the direction of the needles d 'a watch around the axis 53, and in the opposite direction around the axis 63, as indicated by the arrows in Figure 1.

A noter que l'épaisseur rigoureusement plane 8 comporte la fente la plus fine 51, tandis que l'épaisseur bombée 9 comporte la fente la plus large 52. Cette dernière est d'ailleurs un peu plus large que la fente 52 qui avait été découpée à l'origine, cette augmentation de largeur étant due bien entendu à l'opération d'emboutissage.Note that the strictly flat thickness 8 has the thinnest slot 51, while the curved thickness 9 has the widest slot 52. The latter is also a little wider than the slot 52 which had been cut out at the origin, this increase in width being due of course to the stamping operation.

Si, selon l'exemple numérique précédent, la fente 52 a à l'origine une largeur de 0,3 mm, elle a une largeur comprise entre 0,3 et 0,4 mm après l'opération d'emboutissage.If, according to the preceding digital example, the slot 52 originally has a width of 0.3 mm, it has a width of between 0.3 and 0.4 mm after the stamping operation.

La bande 4 est ensuite repliée deux fois à 90 degrés pour obtenir la liaison en U représentée sur la figure 4.The strip 4 is then folded twice at 90 degrees to obtain the U-shaped connection shown in FIG. 4.

A noter que, comme on le voit mieux sur la figure 5, les chanfreins d'entrée 55,65 des deux fentes les plus fines 51,61 sont en retrait par rapport aux chanfreins d'entrée respectifs 54,64 des deux fentes plus larges correspondantes 52,62, et qu'il en est de même pour ces fentes plus fines 51,61 qui sont en retrait par rapport à leurs fentes plus larges respectivement associées 52,62. Ainsi, le fil introduit du haut en bas sera d'abord traité par le chanfrein "supérieur" 54,64 et le début de la fente "large" 52,62, puis il sera traité par le chanfrein "inférieur" 55,65 et la fente "fine" 51,61.Note that, as best seen in FIG. 5, the inlet chamfers 55,65 of the two thinnest slots 51,61 are set back with respect to the respective inlet chamfers 54,64 of the two wider slots corresponding 52,62, and that it is the same for these thinner slots 51,61 which are set back with respect to their wider slots respectively associated 52,62. Thus, the wire introduced from top to bottom will first be treated by the "upper" chamfer 54,64 and the beginning of the "wide" slit 52,62, then it will be treated by the "lower" chamfer 55,65 and the "fine" slot 51.61.

La figure 6 montre clairement le résultat obtenu après l'introduction d'un fil 10 à gaine isolante 11 et âme multibrins 12 dans la fente autodénudante 51,52 d'un organe de connexion autodénudant conforme à l'invention. On voit qu'un morceau de gaine 13 se trouve alors fortement comprimé, et donc tassé, dans l'espace triangulaire E ménagé, conformément à l'invention, entre les deux épaisseurs accolées 8 et 9 du contact autodénudant. Ce morceau de gaine comprimé assure alors une excellente rétention du fil 10 dans la fente 51,52 du contact autodénudant, un effet d'élasticité de l'épaisseur bombée 9 renforçant par ailleurs cette rétention.FIG. 6 clearly shows the result obtained after the introduction of a wire 10 with insulating sheath 11 and multi-strand core 12 into the insulation displacement slot 51, 52 of a insulation displacement connection member in accordance with the invention. We see that a piece of sheath 13 is then strongly compressed, and therefore packed, in the triangular space E formed, in accordance with the invention, between the two adjoining thicknesses 8 and 9 of the insulation displacement contact. This piece of compressed sheath then ensures excellent retention of the wire 10 in the slot 51, 52 of the insulation displacement contact, an effect of elasticity of the convex thickness 9 further reinforcing this retention.

Par ailleurs, de manière avantageuse sans être toutefois obligatoire, la paroi en matière plastique 14 du corps de la réglette qui reçoit le contact autodénudant 2 comporte, au droit du contact 2, une fente 15 de passage du fil 10 qui est plus étroite que le diamètre de la gaine 11 de ce fil 10, tout en étant plus large que l'âme 12 de ce fil 10, de sorte que ce fil 10 se trouve pincé, une fois introduit dans le contact 2, dans cette fente 15.Furthermore, advantageously without however being compulsory, the plastic wall 14 of the body of the strip which receives the insulation displacement contact 2 comprises, in line with the contact 2, a slot 15 for passage of the wire 10 which is narrower than the diameter of the sheath 11 of this wire 10, while being wider than the core 12 of this wire 10, so that this wire 10 is pinched, once introduced into contact 2, in this slot 15.

Avantageusement alors, les bords 16,17 de cette fente 15 sont taillés en biseau de manière à mieux pénétrer, en la pinçant, dans la gaine 11 du fil 10.Advantageously then, the edges 16, 17 of this slot 15 are cut in a bevel so as to better penetrate, by pinching it, in the sheath 11 of the wire 10.

Comme il va de soi, l'invention n'est nullement limitée à l'exemple de réalisation qui vient d'être décrit. C'est ainsi également que cet organe de connexion pourrait comporter deux fentes d'introduction de 2 brins distincts au lieu d'une seule. C'est ainsi aussi qu'il pourrait comporter plus de deux épaisseurs, etc...It goes without saying that the invention is in no way limited to the embodiment which has just been described. It is thus also that this connection member could comprise two insertion slots of 2 separate strands instead of only one. This is also how it could have more than two thicknesses, etc.

Il a été décrit, en référence aux figures 1 à 6, la réalisation d'une liaison dite en "U". On aurait bien évidemment pu, de même façon, décrire ici la réalisation d'une liaison dite "à coupure" telle que par exemple décrite dans la demande EP-95420295.8 précitée.It has been described, with reference to FIGS. 1 to 6, the making of a so-called "U" link. It would obviously have been possible, in the same way, to describe here the production of a so-called "cut-off" connection such as for example described in the aforementioned application EP-95420295.8.

Claims (4)

  1. Connection member having at least one insulation-displacing slot (51, 52), in particular for the connection of a wrapped wire (10) of a telephone or data-terminal line, this connection member comprising at least two joined metal thicknesses (8, 9) each obtained from a flat and elongated metallic element (4), characterized:
    . in that these two joined metal thicknesses (8, 9) are shaped along said insulation displacing slot so as to define therebetween a space (E) whose section, in a first plane (P) orthogonal to the slot, has the form of a triangle, symmetrical with respect to a second plane (P') passing through this slot and orthogonal to the first plane, and
    . in that the first thickness (8) is plane and comprises a first slot (51), and the second thickness (9) is convex and comprises a second slot (52), this second slot (52) being slightly wider than the first slot (51) and its inlet chamfer (55) preceding the inlet chamfer (54) of this first slot.
  2. Terminal block comprising at least one connection member according to Claim 1, characterized in that a wall (14), made of plastics material, of the body of the terminal block which receives the insulation displacing contact (2) comprises, level with the contact (2), a slot (15) for passage of the wire (10) which is narrower than the diameter of the sheath (11) of this wire (10), while being wider than the core (12) of this wire (10), with the result that this wire (10), once introduced in the contact (2), is pinched in this slot (15).
  3. Terminal block according to Claim 2, characterized in that the edges (16, 17) of this slot (15) are bevelled so as better to penetrate, on pinching it, in the sheath (11) of the wire (10).
  4. Process of manufacturing a connection member according to Claim 1,
    characterized in that it consists at least, from a plane metal band (4):
    - in cutting out in said metal band at least one axial hole (5) comprising two axial end slots (51, 52) separated by an enlarged central part (50),
    - in stamping this band at the location of at least one (52) of these two end slots,
    - and in folding this band tight, at least once, in at least two thicknesses (8, 9) along a line (53) orthogonal to the axis of the band, passing through this enlarged central part (50), and chosen so as to cause these two end slots (51, 52) to come into register, this band being folded in a direction which makes it possible finally to define, between the two thicknesses folded tight, said space (E) whose section has the form of a symmetrical triangle.
EP95420359A 1995-12-13 1995-12-13 Connection element having an insulation displacing slot, in particular for telephone or data terminal blocks, its process of making and terminal block comprising at least one such connection element Expired - Lifetime EP0718915B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AT95420359T ATE155615T1 (en) 1995-12-13 1995-12-13 CONNECTING ELEMENT WITH INSULATION-PUNTING SLOT, IN PARTICULAR FOR TELEPHONE OR DATA TRANSMISSION SERIES TERMINALS, ITS PRODUCTION AND SERIES TERMINAL WITH AT LEAST ONE SUCH CONNECTING ELEMENT
DK95420359.2T DK0718915T3 (en) 1995-12-13 1995-12-13 Connecting means with automatic de-insulating slot, in particular for contact rail for interconnecting telephone or data lines, method for its manufacture, and contact rail comprising at least one such connecting means
EP95420359A EP0718915B1 (en) 1995-12-13 1995-12-13 Connection element having an insulation displacing slot, in particular for telephone or data terminal blocks, its process of making and terminal block comprising at least one such connection element
DE69500444T DE69500444T2 (en) 1995-12-13 1995-12-13 Connection element with insulation-cutting slot, in particular for telephone or data transmission terminal blocks, its manufacture and terminal block with at least one such connecting element
ES95420359T ES2105858T3 (en) 1995-12-13 1995-12-13 CONNECTION ELEMENT WITH INSULATING RELEASE SLOT, ESPECIALLY FOR A TERMINAL CONNECTION FOR TELEPHONE OR COMPUTER LINES, ITS MANUFACTURING PROCEDURE, AND A REGULATION COMPRISING AT LEAST ONE OF SUCH CONNECTION ELEMENTS.
GR970402357T GR3024713T3 (en) 1995-12-13 1997-09-11 Connection element having an insulation displacing slot, in particular for telephone or data terminal blocks, its process of making and terminal block comprising at least one such connection element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP95420359A EP0718915B1 (en) 1995-12-13 1995-12-13 Connection element having an insulation displacing slot, in particular for telephone or data terminal blocks, its process of making and terminal block comprising at least one such connection element

Publications (2)

Publication Number Publication Date
EP0718915A1 EP0718915A1 (en) 1996-06-26
EP0718915B1 true EP0718915B1 (en) 1997-07-16

Family

ID=8221580

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95420359A Expired - Lifetime EP0718915B1 (en) 1995-12-13 1995-12-13 Connection element having an insulation displacing slot, in particular for telephone or data terminal blocks, its process of making and terminal block comprising at least one such connection element

Country Status (6)

Country Link
EP (1) EP0718915B1 (en)
AT (1) ATE155615T1 (en)
DE (1) DE69500444T2 (en)
DK (1) DK0718915T3 (en)
ES (1) ES2105858T3 (en)
GR (1) GR3024713T3 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7101216B2 (en) 2004-09-15 2006-09-05 3M Innovative Properties Company Insulation displacement system for two electrical conductors
US7165983B1 (en) 2005-12-08 2007-01-23 3M Innovative Properties Company Access cover configured to receive a testing device
US7335049B2 (en) 2004-09-15 2008-02-26 3M Innovative Properties Company Connector assembly for housing insulation displacement elements
US7399197B2 (en) 2004-09-15 2008-07-15 3M Innovative Properties Company Connector assembly for housing insulation displacement elements
US7458840B2 (en) 2004-09-15 2008-12-02 3M Innovative Properties Company Cap configured to removably connect to an insulation displacement connector block

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1264562B (en) * 1966-09-29 1968-03-28 Siemens Ag Solder-free connection terminal
US3854114A (en) * 1972-08-10 1974-12-10 J Kloth Notched plate clasp apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7101216B2 (en) 2004-09-15 2006-09-05 3M Innovative Properties Company Insulation displacement system for two electrical conductors
US7335049B2 (en) 2004-09-15 2008-02-26 3M Innovative Properties Company Connector assembly for housing insulation displacement elements
US7399197B2 (en) 2004-09-15 2008-07-15 3M Innovative Properties Company Connector assembly for housing insulation displacement elements
US7458840B2 (en) 2004-09-15 2008-12-02 3M Innovative Properties Company Cap configured to removably connect to an insulation displacement connector block
US7165983B1 (en) 2005-12-08 2007-01-23 3M Innovative Properties Company Access cover configured to receive a testing device

Also Published As

Publication number Publication date
EP0718915A1 (en) 1996-06-26
DE69500444D1 (en) 1997-08-21
ATE155615T1 (en) 1997-08-15
ES2105858T3 (en) 1997-10-16
DK0718915T3 (en) 1998-02-23
DE69500444T2 (en) 1998-02-05
GR3024713T3 (en) 1997-12-31

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