EP0743702B1 - Vorrichtung für elektrische Kontakte mit Isolationsverschiebung - Google Patents

Vorrichtung für elektrische Kontakte mit Isolationsverschiebung Download PDF

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Publication number
EP0743702B1
EP0743702B1 EP96400849A EP96400849A EP0743702B1 EP 0743702 B1 EP0743702 B1 EP 0743702B1 EP 96400849 A EP96400849 A EP 96400849A EP 96400849 A EP96400849 A EP 96400849A EP 0743702 B1 EP0743702 B1 EP 0743702B1
Authority
EP
European Patent Office
Prior art keywords
blade
groove
blades
cable
axis
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
EP96400849A
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English (en)
French (fr)
Other versions
EP0743702A1 (de
Inventor
Michel Garcin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FCI SA
Original Assignee
Framatome Connectors International SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Framatome Connectors International SAS filed Critical Framatome Connectors International SAS
Publication of EP0743702A1 publication Critical patent/EP0743702A1/de
Application granted granted Critical
Publication of EP0743702B1 publication Critical patent/EP0743702B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • 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
    • H01R4/242—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 being plates having a single slot
    • H01R4/2425—Flat plates, e.g. multi-layered flat plates
    • H01R4/2429—Flat plates, e.g. multi-layered flat plates mounted in an insulating base

Definitions

  • the invention relates to a device with electrical displacement contacts. insulation.
  • the insulation displacement contacts include a lyre or a "V", the elastic branches of which play the role of blades, the cutting edge of which is turned inward. These blades are parallel and included in the same plan. They are separated by a slit whose dimension is adapted to the dimensions of the wires or cables to be introduced into the contact self-stripping. The introduction of a cable between the two blades starts the process : due to their elasticity, the blades cut the insulating sheath while ensuring the cable retention.
  • the blades are then kept pinched in their upper part. When one or more cables are inserted into the slot, this results deformation in an arc, which guarantees proper operation of the device.
  • this device does not meet all the needs which are felt in the field, in particular that of being able to guarantee efficiency constant for cables of different diameters.
  • the invention provides a electrical contact device with insulation displacement to differentiate the operation taking into account the physical characteristics of the cable introduced, especially its diameter.
  • the invention proposes to use a contact element electric insulation displacement comprising two blades of distinct sections, forming between them a determined angle.
  • the blade of smaller section is arranged in a plane orthogonal to the cable insertion axis and the section blade more important is arranged in a plane forming an angle equal to the angle determined with this same axis. Therefore, and because of additional provisions which will be detailed below, it is possible to obtain the aforementioned differentiated operation.
  • the subject of the invention is therefore a device comprising at least one insulating displacement electrical contact element disposed in a slot produced in an insulating body and intended to receive a cable provided with a sheath insulating, along an insertion axis, said insulating displacement contact element comprising first and second blades, joined by a common base and separated by a slot of determined width into which said cable is inserted, characterized in that the two blades have different widths, in that said slot made in the insulating body has first and second grooves on side walls facing each other, in that the first groove extends along an axis orthogonal to said insertion axis, in that the second groove extends along an axis forming a determined angle with said orthogonal axis greater than zero and less than 90 °, in that the blade of the smallest width or first blade is inserted in the first groove and the largest width blade or second blade is inserted in the second groove so that they form an angle between them equal to said determined angle, in that said second blade is pushed back in
  • the contact element insulation displacement has two asymmetrical blades.
  • Figure 1 illustrates an example of such an insulating displacement contact element 1. It comprises an elongated main body, consisting of two wings, 10 and 11, and extending parallel to a vertical axis (in Figure 1 ) ⁇ .
  • the two wings, 10 and 11, joined by a common base, are separated by a thin longitudinal slot 13, of width "e".
  • This width "e” is determined depending on the precise application envisaged, in particular the diameter of the cables that can be inserted therein.
  • the two wings, 10 and 11 are flared so as to form a "V” whose branches form an angle ⁇ with the aforementioned axis ⁇ .
  • This arrangement known per se, allows easier guidance of a cable (not shown), with a view to its insertion into the slot 13.
  • the wing 10 has a width l 1 greater than the width l 2 of the wing 11.
  • the body of the displacement contact element insulation 1 can be extended downwards by an aligned tab 12 (in the example described) on the vertical axis ⁇ .
  • This tab 12 serves as an electrical contact with a other member, for example a cable (not shown) provided, at its end, with a contact element of complementary shape or inserted in a metallized hole a printed circuit board.
  • Such an insulating displacement contact element 1 is known per se. It can be obtained, for example, by stamping in a strip metallic with appropriate physical characteristics: thickness, elasticity, etc.
  • these contact elements to insulation displacement are mounted in housings 21 provided for this purpose, of a terminal block 2.
  • FIG. 2 illustrates an example of terminal block 2, seen from the side, and Figure 3, the same terminal block 2, seen from above.
  • FIG. 2 illustrates an example of terminal block 2, seen from the side, and Figure 3, the same terminal block 2, seen from above.
  • vertical cutouts in Figure 2 in the body 20 of terminal block 2 for better highlight the particular provisions of the invention.
  • the insulating displacement contact element 1, plane during its production (see Figure 1), is inserted into cable insertion slots 21 so that the wing planes 10 and 11 make an angle ⁇ between them as illustrated more particularly in Figure 3.
  • This angle is in the range 0 ⁇ ⁇ 90 °.
  • ⁇ is of the order of 40 °.
  • the body 20 of the insulating displacement contact element 1 is provided, in the slots 21, with blind grooves, 200 and 201, of sufficient heights so that the wings, 10 and 11, can be there. inserted.
  • the groove 200 extends parallel to an axis ⁇ 2 orthogonal to an axis ⁇ ', parallel to the mean direction of insertion. cables 3 in the slots 21.
  • the groove 201 extends parallel to an axis ⁇ 1 forming an angle ⁇ with the axis ⁇ '. It follows that the wings 10 and 11 form between them the same angle ⁇ .
  • groove 200 We keep a certain lateral clearance for wing 10 in its housing (groove 200). It suffices, as shown more particularly in FIG. 3, that the walls of groove 200 are not parallel to each other, in other words that they have a slight divergence so that the groove 201 is flared in funnel shape.
  • the wing 11 is not completely inserted into the groove 200 of so that its outer edge (straight in Figures 3 and 4) does not touch the bottom of this groove.
  • the insulating displacement contact element 1 is therefore bent and then forced into slot 21 and curved due to geometric characteristics particular of grooves 200 and 201.
  • grooves 200 and 201 are provided on either side, according to the axis ⁇ ', two pairs of vertical stops envisaged with screws, two stops on the right wall, 202 and 204, and two on the left wall, 203 and 205. These stops will be used for guiding and holding the cable 3 which is introduced into the slot 21, with a view to the local stripping of the sheath 30 and the creation of a galvanic contact between the core 30 and the insulating displacement contact element 1.
  • FIGS. 5 and 6 We will now consider two cases illustrated by FIGS. 5 and 6, respectively.
  • the first case concerns a cable with an outside diameter which will be described as "small”. This notion is, of course, relative. A correlation must be made between the diameter or section of the cable 3 and the dimensions of the insulating displacement contact element 1, in particular the spacing "e” (FIG. 1) between the wings 10 and 11.
  • Figure 5 illustrates the operation of the contact element to displacement of insulator 1 for this first case.
  • the cable 3 is introduced into the slot 21 and, more precisely, between the two blades, 10 and 11. Due to the flared shape of the upper end of these blades (figure 1: 13), a guiding effect and a precise positioning of the cable 3, making it easier to introduce it into the gap between the blades, 10 and 11. If you apply a downward force, the process of force insertion between the two blades are primed.
  • the cable 3 is kept substantially straight, aligned with the axis ⁇ ', due to the presence of the pairs of vertical stops facing each other, 202-203 and 204-205, respectively.
  • the widest blade 10 is pushed back in flexion towards the left wall (in FIG. 5) of the groove 201: position 10 '. It can possibly come in abutment on the aforementioned left wall. Simultaneously, the leading edge 100 'of this blade cuts the insulating sheath 31 and establishes galvanic contact with the core 30 of the cable 3.
  • the cable section 3 being assumed to be "small, the position of the narrowest blade 11, the plane of which is orthogonal to the mean axis ⁇ ' cable insertion 3, undergoes little or no change.
  • the right edge remains away from the bottom of the groove 200.
  • the leading edge 110 also cuts the insulating sheath 31 of the cable 3 and comes into galvanic contact with the core 30 of this cable 3.
  • the blade 11 therefore behaves as a fixed beam, in this case.
  • the second case considered relates to cables 3 of so-called section "significant", that is to say typically comprised in a range of 0.4 mm to 0.8 mm, always for the previously stated dimensions of the contact element insulation displacement 1.
  • the second blade that is to say the blade 10 flexes from the groove 201 (position 10 "), this up to the left wall taking into account the larger section of the cable 3.
  • the first blade that is to say the blade 11, is biased in translation and also sinks into its housing, that is to say into the groove 200, along the axis ⁇ 1 . more or less important value of the section of the cable 3, it will sink more or less deeply into this groove 200 until it abuts on the bottom thereof: position 11 ′, as shown in FIG. 6.
  • the cooperation of the two blades has the effect that the second blade, that is to say the blade 11 (position 11 "), exerts a wedge effect on the cable 3 and the cutting points of the insulating sheath 31 are offset along the axis ⁇ '.
  • This arrangement makes it possible to separate the sections of cut insulation. There are many local stripping of the cable 3, over a thickness substantially equal to that of the element insulation displacement contact 1.
  • the arrangement of asymmetrical blades has an additional advantage: it allows a reduction of the intercontact pitch, while maintaining a sufficient width of the blades.
  • the invention achieves the goals it has set for itself. It allows an equal efficiency of operation for cables of different diameters, more specifically cables diameters in two ranges, called “low” and “large”, relative to the dimensions of the insulation displacement contact element 1.
  • the number of rows of displacement contact element insulation is not limited to the unit.

Landscapes

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

Claims (9)

  1. Vorrichtung mit mindestens einem elektrischen Kontaktelement mit Isolationsverschiebung (1), das in einem Schlitz (21) angeordnet ist, welches in einem Isolationskörper (20) vorgesehen ist und ein mit einer Isolationshülse (31) versehenes Kabel (3) entlang einer Einführungsachse (Δ') aufnehmen kann, wobei das Kontaktelement mit Isolationsverschiebung (1) eine erste und eine zweite Klinge (11, 10) aufweist, die durch eine gemeinsame Basis miteinander verbunden sind und durch einen Spalt (13) mit einer bestimmten Breite ("e") getrennt sind, in dem das Kabel (3) eingeführt ist, wobei die Vorrichtung
    dadurch gekennzeichnet ist, daß die zwei Klingen (10, 11) unterschiedliche Breiten aufweisen, und daß der im Isolationskörper (20) vorgesehene Spalt auf den gegenüberliegenden Seitenwänden erste und zweite (200, 201) Nuten umfaßt, daß sich die erste Nut (200) entlang einer zur Einführungsachse (Δ') senkrechten Achse (Δ2) erstreckt, daß sich die zweite Nut (201) entlang einer Achse (Δ1) erstreckt, die mit der senkrechten Achse (Δ2) einen bestimmten Winkel (β) einschließt, der größer Null und kleiner 90° ist, daß die Klinge mit kleinerer Breite oder die erste Klinge (11) in die erste Nut (2) eingeführt ist und daß die Klinge mit größerer Breite oder die zweite Klinge (10) in der Art in die zweite Nut (201) eingeführt ist, daß sie zwischen sich einen Winkel einschließen, der dem bestimmten Winkel (β) entspricht, daß die zweite Klinge (10) gegen eine der Seitenwände der zweiten Nut (201) elastisch zurückgeschoben wird, wenn ein Kabel (3) zwischen den zwei Klingen (10, 11) eingeführt ist und daß die Angriffsränder (110', 100) der ersten und zweiten Klinge (11, 10) zusammenwirken, um das Kabel (3) umzuknicken und die Schnittpunkte der Isolationshülse (31) versetzt sind, so daß die Isolation (31) verschoben wird.
  2. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, daß
    der im Isolationskörper (20) vorgesehene Spalt (21) zwei Paar von Anschlägen (202-203, 204-205) umfaßt, die auf beiden Seiten der ersten (200) und der zweiten (201) Nuten auf den gegenüberliegenden Wänden des im Isolationskörper (20) vorgesehenen Spalts (21) angeordnet sind.
  3. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, daß
    die erste Nut (200) einäugig ist, um die Amplitude der translatorischen Bewegung der ersten Klinge (11) zu begrenzen, indem sie auf dem Boden der ersten Nut anschlägt, wenn die Klinge einer Druckkraft entlang der zur Einführungsachse (Δ') senkrechten Achse (Δ2) ausgesetzt wird.
  4. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, daß
    die zweite Nut (201) eine trichterförmige Aufweitung aufweist, damit sich die zweite Klinge (10) biegen kann.
  5. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, daß
    wenn ein Kabel (3) mit "schwachem" Querschnitt zwischen die Klingen (10, 11) eingeführt wird, wobei der Querschnitt gleich der bestimmten Breite ("e") des Spaltes (13) ist, die Klingen (10, 11) so angeordnet sind, daß einzig die zweite Klinge (10) elastisch (10') gegen eine Wand der zweiten Nut (201) belastet wird, wobei die erste Klinge (11) festbleibt, und daß, wenn ein Kabel (3) mit einem "starken" Querschnitt zwischen die Klingen (10, 11) eingeführt wird, wobei der Querschnitt größer ist als die bestimmte Breite ("e") des Spaltes (13), die Klingen (10, 11) in der Art angeordnet sind, daß die zweite Klinge (10) elastisch belastet ist, bis sie (10") in Anschlag mit einer Wand der zweiten Nut (201) gelangt und die erste Klinge (11) translatorisch (11') in Richtung des Bodens der ersten Nut (200) belastet ist, wobei sich diese normalerweise in einem gewissen Abstand zum Ende der ersten Klinge (11) befindet.
  6. Vorrichtung nach einem der vorherstehenden Ansprüche,
    dadurch gekennzeichnet, daß
    die Klingen (10, 11) eine aufgeweitete Öffnung (14) aufweisen, um das Einführen des Kabels (3) in den Längsspalt (13) zu erleichtern.
  7. Vorrichtung nach einem der vorherstehenden Ansprüche,
    dadurch gekennzeichnet, daß
    der bestimmte Winkel (β) im wesentlichen gleich 40° ist.
  8. Vorrichtung nach einem der vorherstehenden Ansprüche,
    gekennzeichnet durch
    mehrere Kontaktelemente mit Verschiebungsisolation (1), die in Nuten (21) angeordnet sind und die im Isolationskörper (20) vorgesehen sind und auf der zur Einführungsachse (Δ') senkrechten Achse (Δ2) ausgerichtet sind.
  9. Vorrichtung nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, daß
    die Kontaktelemente mit Isolationsverschiebung (1) an ihrer Basis durch elektrische kontaktierende Haken (12) verlängert sind, und daß diese elektrischen kontaktierenden Haken (12) aus dem Isolationskörper (20) aus einem dem Spalt (21) gegenüberliegenden Bereich ragen.
EP96400849A 1995-05-16 1996-04-22 Vorrichtung für elektrische Kontakte mit Isolationsverschiebung Expired - Lifetime EP0743702B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9505755 1995-05-16
FR9505755A FR2734412B1 (fr) 1995-05-16 1995-05-16 Dispositif a contacts electriques a deplacement d'isolant

Publications (2)

Publication Number Publication Date
EP0743702A1 EP0743702A1 (de) 1996-11-20
EP0743702B1 true EP0743702B1 (de) 1999-07-21

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EP96400849A Expired - Lifetime EP0743702B1 (de) 1995-05-16 1996-04-22 Vorrichtung für elektrische Kontakte mit Isolationsverschiebung

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US (1) US5848911A (de)
EP (1) EP0743702B1 (de)
DE (1) DE69603318T2 (de)
FR (1) FR2734412B1 (de)

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Also Published As

Publication number Publication date
FR2734412A1 (fr) 1996-11-22
EP0743702A1 (de) 1996-11-20
DE69603318D1 (de) 1999-08-26
FR2734412B1 (fr) 1997-07-04
DE69603318T2 (de) 1999-11-11
US5848911A (en) 1998-12-15

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