EP0645857B1 - Connecteur pour raccordement électrique - Google Patents

Connecteur pour raccordement électrique Download PDF

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Publication number
EP0645857B1
EP0645857B1 EP94114721A EP94114721A EP0645857B1 EP 0645857 B1 EP0645857 B1 EP 0645857B1 EP 94114721 A EP94114721 A EP 94114721A EP 94114721 A EP94114721 A EP 94114721A EP 0645857 B1 EP0645857 B1 EP 0645857B1
Authority
EP
European Patent Office
Prior art keywords
tabs
elbow
wings
portions
slot
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
EP94114721A
Other languages
German (de)
English (en)
Other versions
EP0645857A1 (fr
Inventor
Gianni Piovesan
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.)
Inarca SpA
Original Assignee
Inarca SpA
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 Inarca SpA filed Critical Inarca SpA
Publication of EP0645857A1 publication Critical patent/EP0645857A1/fr
Application granted granted Critical
Publication of EP0645857B1 publication Critical patent/EP0645857B1/fr
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
    • 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
    • H01R43/16—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for manufacturing contact members, e.g. by punching and by bending

Definitions

  • the present invention relates to a connector for electric connections and to a process for manufacturing such connectors.
  • WO-A-88 05 216 discloses a connector as defined in the preamble of the appended claim 1 and a process for manufacturing electric connectors including the combination of process steps as defined in the preamble of the appended claim 7.
  • connectors are usually used in electrical connections and wirings; these connectors are obtained from a laminar element wherein the electric contact elements are capable of adequately punching through the insulating sheath, if any, of the conductor and of entering it to provide contact.
  • One kind of these connectors comprises a laminar body made of a conducting metallic material with at least two oppositely arranged substantially rigid wings which form, between them, a slot in which two elastic electrical contact tabs converge towards the bottom; each tab blends with one of the wings, forming an elbow.
  • a conductor can be inserted and locked between said elastic tabs, forming an electric contact.
  • Some regions of the borders of the tabs are sharp, so that during the insertion of the conductor between them the insulating sheath thereof is cut and so that said tabs can penetrate in the conductor and provide contact with the conducting part.
  • the laminar element from which the connector is obtained is blanked by means of punches which must of course have a certain thickness in order to provide an effective cutting action.
  • the notches have the important drawback that they weaken the structure exactly in a region where the stresses induced by the presence of the conductor once installed tend to discharge.
  • a principal aim of the present invention is to provide a connector for electrical connections of the type described above which eliminates the drawbacks described above in the known art.
  • a consequent primary object is to provide a connector that provides improved contact and electrical connection with respect to those currently commercially available.
  • Another important object is to provide a connector which is suitable for electrical conductors having a wide range of diameters.
  • Another important object is to provide a connector whose manufacture does not entail particular technical difficulties, with particular reference to the operations for blanking with punches.
  • Another important object is to provide a connector that can be manufactured without particular difficulties with conventional equipment and facilities.
  • Another important object is to provide a connector that can be manufactured with dies that are more reliable than current ones.
  • a connector for electrical connections is generally designated by the reference numeral 10 and comprises a laminar body 11 made of a conducting material, such as copper or copper alloy, with two oppositely arranged wings 12; each wing is wide enough to be substantially rigid, and said wings form, between them, a slot 13 in which two elastic tabs 15 converge towards the bottom 14; each tab blends, by means of an elbow-shaped portion 16, with a corresponding wing 12.
  • a laminar body 11 made of a conducting material, such as copper or copper alloy
  • Said tabs 15 touch each other at a flat tip region 17 thereof and together they delimit a space 18 which tapers from the region of the elbow-shaped portions 16 towards the region of mutual contact.
  • Each border of the tabs 15 that delimits the space 18 has a double blade 19 obtained by chamfering, by plastic deformation, the material at the edges.
  • An insulated electric conductor 20 (enamelled copper wire) can be inserted between the elastic tabs 15 until it accommodates between the flat regions 17; its coating is conveniently subjected, in substantially opposite positions, to a double incision by the double blade 19, which makes the tabs 15 penetrate the insulating layer 21 to reliably and broadly rest against the core 22 with the flat regions 17 so as to provide electrical contact.
  • said tabs 15 are formed by blanking the metal plate from which the connector 10 is obtained with a punch that forms said tabs so that they have flat regions 17 at a certain distance from one another and so that their ends are spaced from the bottom 14 of the slot 13.
  • the two elastic tabs 15 are pre-loaded so as to push towards each other by corresponding raised portions 23, which are formed so as to affect the inner border of each elbow-shaped blending portion 16, and by a deformation of said wings 12, as will become apparent hereinafter, which are moved so that their ends become mutually closer, assuming a parallel arrangement, from an initial state after blanking in which they diverge.
  • a raised portion 24 is formed on the body 11 so as to affect the border of the slot 13 in order to move a portion thereof towards the tabs 15.
  • the raised portion 24 can be adjusted according to the type of material and/or its thickness without having to act on the blanking punches.
  • a second step (figure 5), blanking is performed by means of punches 27 so as to form the border of said elastic tabs 15 which forms the part 18 for the insertion of the conductor 20.
  • Adequate space is left between the flat regions 17 due to the need to form the punch with a certain thickness.
  • a further step forms the double blades 19 on the elastic tabs 15 by compression, for example by means of suitable punches 28.
  • a subsequent step (figure 7) performs blanking, by means of a punch 29, so as to form the border of said slot 13 and the remaining parts of the tabs 15.
  • the final step is the gauging of said body 11 so as to move the divaricated ends of said wings 12 mutually closer, in order to provide a second pre-loading of said tabs 15, which are pushed towards the bottom of the slot 13.
  • each elbow-shaped portion 16 in fact produces a first pre-loading of the tabs 15 without weakening the structure as hitherto required in known embodiments.
  • Pre-loading is conveniently completed by moving mutually closer the ends of the wings 12 which are divaricated after the blanking operation.
  • the ends of the tabs 15 can move freely and elastically without interference with the bottom 14 of the slot 13 from which the raised portion 24 is formed; said raised portion cooperates with said tabs in retaining the conductor 20.
  • the border with a double blade and contact over a flat region furthermore help to improve both penetration in the insulating layer 21 and actual electrical contact.
  • the final flat part of the tabs allows the connection of thinner enamelled wires without the risk of cutting them.
  • the materials employed may be any according to the requirements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Details Of Aerials (AREA)
  • Manufacturing Of Electrical Connectors (AREA)

Claims (10)

  1. Connecteur (10) pour des connexions électriques du type qui comprend un corps lamelliforme (11) fait d'un matériau conducteur avec au moins deux ailes sensiblement rigides disposées en vis-à-vis (12) qui forment une fente (13) dans laquelle deux languettes élastiques (15) convergent vers le fond (14), chaque languette (15) se raccordant avec l'une correspondante des ailes (12) de façon à former une portion en forme de coude (16), un conducteur électrique isolé (20) pouvant être introduit entre lesdites languettes élastiques (15) jusqu'à leurs extrémités libres, des parties (19) des bords desdites languettes (15) étant tranchantes de façon à former des lames, lesdites languettes (15) étant préalablement chargées, de façon à être poussées l'une vers l'autre, par des portions exhaussées (23), qui sont formées de façon à affecter chacune l'une desdites portions de raccordement en forme de coude (16), ce qui a pour but de rapprocher l'une de l'autre leurs extrémités, caractérisé en ce que lesdites portions exhaussées (23) sont positionnées pour affecter le bord interne desdites portions de raccordement en forme de coude (16) au niveau de ladite fente (13) et en ce que lesdites portions de raccordement en forme de coude (16) sont sensiblement continues sans aucune entaille partant dudit bord intérieur au niveau de ladite fente (13), et en ce que lesdites languettes (15) sont préalablement chargées au moyen d'une déformation desdites ailes (12) pour rapprocher l'une de l'autre leurs extrémités.
  2. Connecteur selon la revendication 1, caractérisé en ce que le fond (14) de ladite fente (13) a une région qui se trouve plus proche des extrémités desdites languettes et est formée par une portion exhaussée (24) procurée sur ledit corps (11) de façon à former un bord d'appui pour ledit conducteur (20).
  3. Connecteur selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que chacune desdites lames (19) s'étend depuis les bords de l'espace convergent qui se trouve entre lesdites languettes (15) jusqu'à une région terminale avec une surface plate (17) où est procuré le contact avec ledit conducteur (20).
  4. Connecteur selon la revendication 3, caractérisé en ce que le bord desdites languettes (15) a deux lames (19) formées en comprimant les bords correspondants.
  5. Connecteur selon une ou plusieurs des revendications précédentes, caractérisé en ce que les régions (17) desdites languettes (15) destinées à entrer en contact avec ledit conducteur sont plates.
  6. Connecteur selon une ou plusieurs des revendications précédentes, caractérisé en ce que lesdites languettes (15) sont préchargées au moyen desdites portions exhaussées (23) et au moyen de la déformation desdites ailes (12) à un point tel que les extrémités desdites languettes (15) sont en contact mutuel.
  7. Procédé pour fabriquer un connecteur (10) selon une ou plusieurs des revendications précédentes, comprenant les étapes suivantes :
    - découper une bande de tôle métallique en avancement continu (25) de façon à former les bords de la région (18) destinée à l'introduction dudit conducteur (20), formant un espace au niveau des portions mutuellement fermées ;
    - biseauter lesdits bords de façon à former des lames correspondantes (19) ;
    - découper ladite bande de métal (25) de façon à former un bord de ladite fente (13) et terminer lesdites languettes (15) ;
    - poinçonner ladite bande de métal (25) de façon à former lesdites portions exhaussées (23) au niveau des portions de raccordement en forme de coude (16) pour précharger lesdites languettes (15) ; et
    - découper ladite bande de métal (25) de façon à achever ledit corps (11) avec lesdites ailes (12) en position divergente ;
    le procédé étant caractérisé en ce que lesdites portions exhaussées (23) pour précharger lesdites languettes (15) sont formées au niveau du bord interne desdites portions de raccordement en forme de coude (16) au niveau de ladite fente (13) sans former aucune entaille dans lesdites portions de raccordement en forme de coude (16) ; et en ce que le procédé comprend en outre l'étape suivante :
    - calibrer ledit corps (11) de façon à rapprocher l'une de l'autres les extrémités divergentes desdites ailes (12) pour précharger davantage lesdites languettes (15).
  8. Procédé selon la revendication 7, comprenant en outre l'étape suivante :
    - former une autre portion exhaussée (24) positionnée au niveau du fond (14) de ladite fente (13) pour rapprocher le fond (14) de ladite fente (13) desdites languettes (15).
  9. Procédé selon une ou plusieurs des revendications 7 et 8, caractérisé en ce que le biseautage desdits bords de façon à former des lames correspondantes (19) est effectué en comprimant les arêtes desdits bords de façon à former des doubles lames pour chaque bord et de telle sorte que lesdites lames (19) s'étendent depuis les extrémités de l'espace convergent situé entre lesdites languettes (15) jusqu'à une région terminale avec une surface plate (17) où est prévu le contact avec ledit conducteur (20).
  10. Procédé selon l'une ou plusieurs des revendications 7 à 9, caractérisé en ce que la précharge desdites languettes (15) par formation desdites portions exhaussées (23) au niveau desdites portions de raccordement en forme de coude (16) et au moyen du calibrage dudit corps (11) pour rapprocher l'une de l'autre les ailes (12), amène les extrémités desdites languettes (15) en contact mutuel.
EP94114721A 1993-09-24 1994-09-19 Connecteur pour raccordement électrique Expired - Lifetime EP0645857B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPD930189 1993-09-24
ITPD930189A IT1263694B (it) 1993-09-24 1993-09-24 Connettore per collegamenti elettrici

Publications (2)

Publication Number Publication Date
EP0645857A1 EP0645857A1 (fr) 1995-03-29
EP0645857B1 true EP0645857B1 (fr) 1997-11-26

Family

ID=11390446

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94114721A Expired - Lifetime EP0645857B1 (fr) 1993-09-24 1994-09-19 Connecteur pour raccordement électrique

Country Status (7)

Country Link
EP (1) EP0645857B1 (fr)
AT (1) ATE160654T1 (fr)
DE (1) DE69407016T2 (fr)
DK (1) DK0645857T3 (fr)
ES (1) ES2111227T3 (fr)
GR (1) GR3025820T3 (fr)
IT (1) IT1263694B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1287190B1 (it) * 1996-01-31 1998-08-04 Inarca Spa Connettore per collegamenti elettrici
ITPD20070033A1 (it) 2007-02-02 2008-08-03 Inarca Spa Terminale perfezionato per fili elettrici smaltati
CN110364842B (zh) * 2018-03-26 2021-05-28 泰科电子(上海)有限公司 导电端子和连接器

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1029109A (fr) * 1976-03-01 1978-04-04 Northern Electric Company Borne a denuder
US4012102A (en) * 1976-05-26 1977-03-15 Minnesota Mining And Manufacturing Company Solderless electrical contact
CA1080451A (fr) * 1976-07-30 1980-07-01 Charles Mcgonigal Connecteur electrique autodenudant a faisceau fendu
DE3116731C2 (de) * 1981-04-28 1985-03-14 Karl Lumberg GmbH & Co, 5885 Schalksmühle Kontaktelement
GB2130815A (en) * 1982-10-20 1984-06-06 H & T Components Ltd Electrical connectors
US4638559A (en) * 1984-10-30 1987-01-27 At&T Technologies, Inc. Methods of and apparatus for making slotted beam contact elements
US4749365A (en) * 1987-01-09 1988-06-07 George Magnifico Insulation displacement terminal

Also Published As

Publication number Publication date
DE69407016T2 (de) 1998-04-16
ES2111227T3 (es) 1998-03-01
ITPD930189A1 (it) 1995-03-24
DK0645857T3 (da) 1998-08-10
ATE160654T1 (de) 1997-12-15
GR3025820T3 (en) 1998-03-31
DE69407016D1 (de) 1998-01-08
ITPD930189A0 (it) 1993-09-24
EP0645857A1 (fr) 1995-03-29
IT1263694B (it) 1996-08-27

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