EP1568106B1 - Contact screw - Google Patents

Contact screw Download PDF

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Publication number
EP1568106B1
EP1568106B1 EP02769835A EP02769835A EP1568106B1 EP 1568106 B1 EP1568106 B1 EP 1568106B1 EP 02769835 A EP02769835 A EP 02769835A EP 02769835 A EP02769835 A EP 02769835A EP 1568106 B1 EP1568106 B1 EP 1568106B1
Authority
EP
European Patent Office
Prior art keywords
screw
contact
threading
pitch
coating
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
EP02769835A
Other languages
German (de)
French (fr)
Other versions
EP1568106A1 (en
Inventor
Christian Gossmann
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.)
Woertz AG
Original Assignee
Woertz AG
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 Woertz AG filed Critical Woertz AG
Priority to AT02769835T priority Critical patent/ATE323956T1/en
Publication of EP1568106A1 publication Critical patent/EP1568106A1/en
Application granted granted Critical
Publication of EP1568106B1 publication Critical patent/EP1568106B1/en
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
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
    • H01R9/05—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for coaxial cables
    • H01R9/053—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for coaxial cables using contact members penetrating insulation
    • 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
    • H01R4/2475—Connections using contact members penetrating or cutting insulation or cable strands the contact members penetrating the insulation being actuated by screws, nuts or bolts
    • H01R4/2483—Connections using contact members penetrating or cutting insulation or cable strands the contact members penetrating the insulation being actuated by screws, nuts or bolts penetrating the area under the screw tip
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
    • H01R9/05—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for coaxial cables
    • H01R9/0509—Tapping connections
    • 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
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/307—Clamped connections, spring connections utilising a screw or nut clamping member characterised by the thread of the screw or nut

Definitions

  • the present invention relates to a contact screw for the conductor wire of a shielded cable, in particular the data transmission of a multi-core flat cable, which screw is intended to be axially guided in a threaded connection device and having a screw-threaded shaft and a contact tip, said for penetrating the cable insulation and the shield provided portion of the contact tip is provided with a covering of insulating material.
  • the problem is to pierce the data conductor in the shielded cable without contacting the screen (electrically conductive material) with the screw, thereby achieving good contact resistance between the tip of the contact tip and the conductor and maintain a high withstand voltage between shield and conductor.
  • Document DE-A-3340943 discloses a screw according to the preamble of claim 1.
  • Object of the present invention was to eliminate the above-mentioned disadvantages in a contact screw of the type defined.
  • FIG. 1 shows the lower part of a metal contact screw with shank 1 and contact tip 2 with mushroom-shaped end 2 '.
  • a Screw thread 3 with a predetermined pitch eg 0.7 mm
  • a connecting device not shown
  • a sleeve 4 is placed from insulating material.
  • the sleeve 4 like the contact tip 2, runs conically towards the end 2 'and lies between the shoulders 1' of the shaft end and 2 "of the mushroom-shaped end 2 '.
  • a thread 5 On the outer surface of the sleeve 4 there is provided a thread 5, possibly a double helix, the pitch of which is greater than that of the screw thread 3 (for example 1.2 mm compared to 0.7 mm).
  • the pressure between the flanks of the contact tip 2 of the screw and the insulating material of the cable is increased, thereby further improving the dielectric strength.
  • the mushroom-like shape of the end 2 'of the contact tip 2 protects the insulating sleeve 4, whereby the penetration force is transmitted from the metal part and not through the insulating sleeve.
  • Fig. 3 of the drawing shows purely schematically a contact screw according to the prior art. It is clearly visible how the screen 10 is pressed closer to the conductor 20 at the penetration point.
  • Fig. 4 shows the inventive solution. It is clearly visible how, thanks to the external thread 5, with respect to the screw thread 3 greater pitch, on the insulating sleeve 4, both the insulation and the screen 10 is moved away from the conductor 20 at the penetration point.

Description

Die vorliegende Erfindung betrifft eine Kontaktschraube für die Leiterader eines abgeschirmten Kabels, insbesondere die Datenübertragungsader eines mehrere Leiteradern aufweisenden Flachkabels, welche Schraube dazu vorgesehen ist, in einer Anschlussvorrichtung mittels Gewinde axial geführt bewegt zu werden und einen Schaft mit Schraubgewinde sowie eine Kontaktspitze aufweist, wobei der zum Durchdringen der Kabelisolation und des Schirms vorgesehene Abschnitt der Kontaktspitze mit einem Belag aus isolierendem Material versehen ist.The present invention relates to a contact screw for the conductor wire of a shielded cable, in particular the data transmission of a multi-core flat cable, which screw is intended to be axially guided in a threaded connection device and having a screw-threaded shaft and a contact tip, said for penetrating the cable insulation and the shield provided portion of the contact tip is provided with a covering of insulating material.

Insbesondere bei Flachkabeln, welche Energieübertragungs- und Datenübertragungsadern aufweisen, besteht das Problem darin den Datenleiter im geschirmten Kabel anzustechen, ohne den Schirm (elektrisch leitendes Material) mit der Schraube zu kontaktieren, dabei einen guten Übergangswiderstand zwischen dem Ende der Kontaktspitze und dem Leiter zu erzielen und eine hohe Spannungsfestigkeit zwischen Schirm und Leiter beizubehalten.In particular, in flat cables having power transmission and data transmission wires, the problem is to pierce the data conductor in the shielded cable without contacting the screen (electrically conductive material) with the screw, thereby achieving good contact resistance between the tip of the contact tip and the conductor and maintain a high withstand voltage between shield and conductor.

Bisher.wurde diese Aufgabe mit einer Kontaktschraube mit einer Endhülse aus hartem Isoliermaterial gelöst, welche beim Anstechen des Leiters den Kabelmantel, den Schirm und die Aderisolation durchdringt. Nachteilig bei dieser Lösung ist, dass die Eindringkraft auf das Isoliermaterial übertragen wird und der Schirm zum Leiter hin gezogen wird, was die Distanz zwischen Schirm und Leiter nachteilig reduziert.So far, this problem has been solved with a contact screw with a ferrule made of hard insulating material, which penetrates the cable sheath, the screen and the wire insulation during piercing of the conductor. A disadvantage of this solution is that the penetration force is transmitted to the insulating material and the screen is pulled towards the conductor, which adversely reduces the distance between the screen and the conductor.

Dokument DE-A-3340943 offenbart eine Schraube gemäß dem Oberbegriff des Anspruchs 1.Document DE-A-3340943 discloses a screw according to the preamble of claim 1.

Aufgabe der vorliegenden Erfindung war es, bei einer Kontaktschraube der eingangs definierten Art die vorgenannten Nachteile zu eliminieren.Object of the present invention was to eliminate the above-mentioned disadvantages in a contact screw of the type defined.

Diese Aufgabe wurde bei einer Kontaktschraube der genannten Art erfindungsgemäss durch die Merkmale gemäss dem kennzeichnenden Teil von Anspruch 1 gelöst.This object has been achieved according to the invention in a contact screw of the type mentioned by the features according to the characterizing part of claim 1.

Mit der Erfindung wird eine im Vergleich zum Stand der Technik höhere Spannungsfestigkeit zwischen Schirm und Leiter erzielt und die Eindringkraft vom Metallteil der Schraube und nicht mehr durch das Isoliermaterial übertragen. Weiter ermöglicht diese Lösung eine grössere Kontaktfläche zwischen Schraube (Spitzende) und Leiter zu erzielen.With the invention, a higher voltage resistance between shield and conductor is achieved in comparison to the prior art, and the penetration force is transferred from the metal part of the screw and not through the insulating material. Furthermore, this solution allows a larger contact surface between the screw (spigot) and conductor to achieve.

Besonders vorteilhafte Ausführungsformen des Erfindungsgegenstandes sind in den abhängigen Ansprüchen definiert.Particularly advantageous embodiments of the subject invention are defined in the dependent claims.

Die Erfindung wird nachstehend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels noch etwas näher erläutert. Es zeigt:

  • Fig. 1 eine Seitenansicht des Kontaktspitzendes einer erfindungsgemässen Kontaktschraube;
  • Fig. 2 eine ähnliche Ansicht wie Fig. 1 mit aufgesetzter Isolierhülse, und
  • Fig. 3 und Fig. 4 schematisch die Wirkungsweise von Kontaktschrauben.
The invention will be explained in more detail below with reference to an embodiment shown in the drawing. It shows:
  • 1 shows a side view of the contact tip end of a contact screw according to the invention;
  • Fig. 2 is a similar view as Fig. 1 with attached insulating sleeve, and
  • Fig. 3 and Fig. 4 shows schematically the operation of contact screws.

Die Zeichnung (Fig. 1 und 2) zeigt den unteren Teil einer Kontaktschraube aus Metall mit Schaft 1 und Kontaktspitze 2 mit pilzförmigem Ende 2'. Am Schaft 1 ist ein Schraubgewinde 3 mit vorbestimmter Steigung (z.B. 0,7 mm) vorgesehen, über welches die Schraube in einer Gewindebohrung einer Anschlussvorrichtung (nicht dargestellt) axial geführt bewegt werden kann.The drawing (FIGS. 1 and 2) shows the lower part of a metal contact screw with shank 1 and contact tip 2 with mushroom-shaped end 2 '. On the shaft 1 is a Screw thread 3 with a predetermined pitch (eg 0.7 mm) provided over which the screw in a threaded bore of a connecting device (not shown) can be moved axially guided.

Im Schraubenabschnitt zwischen Schaftende und Ende der Kontaktspitze 2 ist eine Hülse 4 aus isolierendem Material aufgesetzt. Die Hülse 4 läuft wie die Kontaktspitze 2 konisch zum Ende 2' hin und liegt dabei zwischen den Schultern 1' des Schaftendes und 2" des pilzförmigen Endes 2'.In the screw portion between the shaft end and the end of the contact tip 2, a sleeve 4 is placed from insulating material. The sleeve 4, like the contact tip 2, runs conically towards the end 2 'and lies between the shoulders 1' of the shaft end and 2 "of the mushroom-shaped end 2 '.

Auf der Aussenfläche der Hülse 4 ist ein Gewinde 5, ev. eine Doppelwendel, vorgesehen, dessen Steigung grösser ist als jene des Schraubgewindes 3 (z.B. 1,2 mm im Vergleich zu 0,7 mm).On the outer surface of the sleeve 4 there is provided a thread 5, possibly a double helix, the pitch of which is greater than that of the screw thread 3 (for example 1.2 mm compared to 0.7 mm).

Da das Schraubgewinde 3 die Bewegung der Schraube bestimmt, ergibt sich eine relative Bewegung im Bereich des Gewindes 5 der Hülse 4, welche das Isoliermaterial des Leiters nach oben zieht (d.h. vom Leiter weg) und somit den Abstand zwischen Schirm und Leiter beim Einschrauben der Kontaktschraube erhöht.Since the screw thread 3 determines the movement of the screw, there is a relative movement in the region of the thread 5 of the sleeve 4, which pulls the insulating material of the conductor upwards (ie away from the conductor) and thus the distance between the shield and conductor when screwing the contact screw elevated.

Durch die konische Formgebung der isolierenden Hülse 4 wird der Druck zwischen den Flanken der Kontaktspitze 2 der Schraube und dem Isoliermaterial des Kabels erhöht und damit die Spannungsfestigkeit nochmals verbessert.Due to the conical shape of the insulating sleeve 4, the pressure between the flanks of the contact tip 2 of the screw and the insulating material of the cable is increased, thereby further improving the dielectric strength.

Die pilzartige Form des Endes 2' der Kontaktspitze 2 schützt die isolierende Hülse 4, wodurch die Eindringkraft vom Metallteil und nicht mehr durch die isolierende Hülse übertragen wird.The mushroom-like shape of the end 2 'of the contact tip 2 protects the insulating sleeve 4, whereby the penetration force is transmitted from the metal part and not through the insulating sleeve.

Fig. 3 der Zeichnung zeigt rein schematisch eine Kontaktschraube gemäss Stand der Technik. Gut sichtbar ist, wie der Schirm 10 an der Durchdringstelle näher zum Leiter 20 gedrückt wird.Fig. 3 of the drawing shows purely schematically a contact screw according to the prior art. It is clearly visible how the screen 10 is pressed closer to the conductor 20 at the penetration point.

Fig. 4 zeigt die erfindungsgemässe Lösung. Deutlich sichtbar ist, wie dank dem Aussengewinde 5, mit im Vergleich zum Schraubgewinde 3 grösserer Steigung, auf der isolierenden Hülse 4 sowohl die Isolation als auch der Schirm 10 an der Durchdringstelle vom Leiter 20 wegbewegt wird.Fig. 4 shows the inventive solution. It is clearly visible how, thanks to the external thread 5, with respect to the screw thread 3 greater pitch, on the insulating sleeve 4, both the insulation and the screen 10 is moved away from the conductor 20 at the penetration point.

Claims (5)

  1. A contact screw for the conductive core of a shielded cable, in particular the data transmission core of a flat cable having a plurality of conductive cores, such screw being provided to be moved axially guided in a connecting device by means of a threading and having a shank (1) with screw threading and a contact tip (2), the section of the contact tip provided for penetration of the cable insulation, but not its end section (2'), being provided with a coating of insulating material, and the exterior surface of the insulating coating being provided with a threading, characterized in that the pitch of the threading of the coating is greater than the pitch of the screw threading on the shank.
  2. The contact screw as claimed in claim 1, characterized in that the contact tip is configured to taper toward the end of the screw and the coating is also configured as a tapering casing.
  3. The contact screw as claimed in claim 1 or 2, characterized in that the threading on the exterior surface of the insulating coating is a multiple helix, preferably a double helix.
  4. The contact screw as claimed in one of claims 1 to 3, characterized in that the pitch of the threading on the exterior surface of the insulating coating is up to twice as large as the pitch of the screw threading on the shank.
  5. The contact screw as claimed in one of claims 1 to 4, characterized in that the end of the contact tip is mushroom-shaped and the insulating coating, for example the tapered casing, is positioned behind the shoulder of the mushroom.
EP02769835A 2002-11-04 2002-11-04 Contact screw Expired - Lifetime EP1568106B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT02769835T ATE323956T1 (en) 2002-11-04 2002-11-04 CONTACT SCREW

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH2002/000593 WO2004042872A1 (en) 2002-11-04 2002-11-04 Contact screw

Publications (2)

Publication Number Publication Date
EP1568106A1 EP1568106A1 (en) 2005-08-31
EP1568106B1 true EP1568106B1 (en) 2006-04-19

Family

ID=32304022

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02769835A Expired - Lifetime EP1568106B1 (en) 2002-11-04 2002-11-04 Contact screw

Country Status (7)

Country Link
US (1) US7122741B2 (en)
EP (1) EP1568106B1 (en)
JP (1) JP4249132B2 (en)
CN (1) CN100353613C (en)
AU (1) AU2002336023A1 (en)
DE (1) DE50206507D1 (en)
WO (1) WO2004042872A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007041814A1 (en) 2007-09-03 2009-03-05 Woertz Ag Device for stripping-free production of a connection to a flat cable
DE102007041815B4 (en) 2007-09-03 2009-07-09 Woertz Ag Device for stripping-free production of a connection to a flat cable
US8923012B2 (en) * 2011-06-15 2014-12-30 Rockwell Automation Technologies, Inc. Electrostatic discharge protection for modular equipment
EP2906030B1 (en) * 2014-02-11 2018-09-19 Siemens Aktiengesellschaft Electronic assembly with electrically conductive connection
EP2999054B1 (en) * 2014-09-22 2017-07-19 Tyco Electronics Simel S.A.S. Binding screw for a wire connection assembly and wire connection assembly
JP6984011B2 (en) * 2017-10-03 2021-12-17 カービン ベンチャーズ, インコーポレイテッド ディ/ビー/エー ケーブル テクノロジー ラボラトリーズCarbine Ventures, Inc. d/b/a Cable Technology Laboratories Improved connectivity between conductor elements
CN108493641B (en) * 2018-03-13 2019-10-25 安徽江淮汽车集团股份有限公司 Battery terminal
DE102020104278B4 (en) 2020-02-18 2021-12-09 Wieland Electric Gmbh Piercing screw

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2097426A (en) * 1935-08-10 1937-11-02 Gen Motors Corp Distributor cap
US3848955A (en) * 1973-08-09 1974-11-19 Westinghouse Electric Corp Electrical connector for tapping a concentric electrical cable
DE3340943A1 (en) * 1983-11-11 1985-05-23 Siemens AG, 1000 Berlin und 8000 München Device for the joint-free contacting of the inner and outer conductors of a coaxial cable
US5131283A (en) * 1990-11-26 1992-07-21 Canfield Michael H Tool for sampling oil from electric distribution transformer tanks for PCB contamination
CN2142611Y (en) * 1992-11-03 1993-09-22 郑亚峰 Lamp holder capable to prolong the life of incandescence lamp
DE4402837C2 (en) * 1994-01-31 1998-08-06 Daetwyler Ag Electrical installation system, formed by flat cable and connection device
CN2475867Y (en) * 2001-04-23 2002-02-06 袁学高 Conducting screw for fixing wire insulating sheath

Also Published As

Publication number Publication date
US7122741B2 (en) 2006-10-17
JP4249132B2 (en) 2009-04-02
WO2004042872A1 (en) 2004-05-21
DE50206507D1 (en) 2006-05-24
EP1568106A1 (en) 2005-08-31
CN100353613C (en) 2007-12-05
JP2006505110A (en) 2006-02-09
US20060060373A1 (en) 2006-03-23
CN1695273A (en) 2005-11-09
AU2002336023A1 (en) 2004-06-07

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