EP0055876A2 - Verbinder für diskrete Kabel mit Isolationsverschiebung - Google Patents

Verbinder für diskrete Kabel mit Isolationsverschiebung Download PDF

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Publication number
EP0055876A2
EP0055876A2 EP81201330A EP81201330A EP0055876A2 EP 0055876 A2 EP0055876 A2 EP 0055876A2 EP 81201330 A EP81201330 A EP 81201330A EP 81201330 A EP81201330 A EP 81201330A EP 0055876 A2 EP0055876 A2 EP 0055876A2
Authority
EP
European Patent Office
Prior art keywords
sidewalls
opposed
pair
wire
edges
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.)
Withdrawn
Application number
EP81201330A
Other languages
English (en)
French (fr)
Other versions
EP0055876A3 (de
Inventor
Edward Harvey Key
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of EP0055876A2 publication Critical patent/EP0055876A2/de
Publication of EP0055876A3 publication Critical patent/EP0055876A3/de
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/50—Bases; Cases formed as an integral body
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/58—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable

Definitions

  • This invention relates to an improved electrical connector, and, more particularly, to an improved connector which includes an insulation displacement contact for individual or mass termination of discrete wires having improved reliability and strain relief.
  • U.S. Patent 4,159,158 discloses and claims an electrical connector of the insulation displacement type for terminating discrete wires.
  • the sidewall of the connector housing is provided with external ribs, the upper ends of which are arrow- shaped.
  • the trailing edges of these adjacent arrow-like porti ⁇ n provide a constriction for receiving a wire to be terminated while also serving as a strain relief for the wire when an upward tensile pull is applied to it.
  • These arrow-like members are molded as a rigid intergral part of the connector housing. They are relatively inflexible and may not provide effective strain relief for a range of wire sizes.
  • the present invention provides an electrical connector having insulation displacement contacts for mass termination of discrete wires.
  • the connector comprises a housing having a pair of opposed sidewalls, the upper edges of which have at least one flexible prong integrally joined thereto and turned inwardly in opposed relationship defining a tapered access for a discrete wire.
  • the housing further comprises a pair of lower end walls joined to the sidewalls forming a lower elongated cavity and a pair of opposed webs spaced from the endwalls and joining the sidewalls, the upper edges of the webs being above the upper edges of the endwalls.
  • the connector of this invention has a terminal including an insulation displacement contact having a pair of blades defined by a line of cut.
  • the contact includes a strain relief aperature at the base of the cut, and the edges of the blades are tapered inwardly to provide a "V" shaped entry to the cut.
  • the terminal is mounted in the connector between the sidewalls in parallel spaced relation to the webs with the blades arranged to-receive and terminate a wire inserted therebetween.
  • each of the sidewalls has a generally vertical slot in opposed relationship extending downwardly from the upper edge to an intermediate termination, the opposed slots defining a guide channel.
  • the edges of the contact are tapered outwardly and ride in the guide channel. In operation, the guide channel prevents the blades of the contact from skewing as a wire is being terminated.
  • the electrical connector of this invention may be produced as a single unit or it may be part of a multiunit component for terminating a plurality of discrete wires. It is capable of terminating a wide range of wire sizes, e.g., 22-30 awg, either solid or stranded, and the upper edges of the webs in cooperation with the inwardly turned prongs provide a substantially improved strain relief feature.
  • IDC shall mean an insulation displacement contact.
  • IDC connector shall mean an electrical connector having an insulation displacement contact for terminating discrete wires or ribbon cable prepared at an end to appear as discrete wires.
  • one embodiment 10 of this invention comprises an IDC connector for disengagably connecting individual wires 11 to spaced terminal posts 12 which can be mounted in and extended from a backplane or many other places.
  • the connector comprises a housing 14 which may include one or more terminals 16.
  • the housing 14 comprises a pair of opposed exterior sidewalls 18.
  • One or more interior walls 20 may also be provided depending on where the connector is to be used and the number of wires which are to be terminated.
  • Each of the exterior sidewalls 18 and interior walls 20 has an upper edge. 22 to each of which are integrally joined at least one prong 24.
  • each upper edge 22 has two prongs 24 integrally joined thereto.
  • prongs 24 are turned inwardly in opposed relation to each other defining a tapered access-to the connector for a discrete wire 11.
  • Prongs 24 are flexible and will bend outwardly away from each other as a wire is being inserted into the connector.
  • the prongs 24, because fo their elasticity, tend to return to their original position as soon as a wire has been inserted to a depth immediately below their trailing edges 26 as shown in Figure 4.
  • each of the sidewalls 18 has a generally vertical slot 28 on the inner opposing surfaces thereof.
  • Interior walls 20, as well, are provided with a generally vertical slot 28 on each interior surface, each pair of opposed vertical slots defining a guide channel.
  • Each guide channel extends downwardly from the upper edges 22 of the side and interior walls to an intermediate termination point 30.
  • a terminal can then be mounted in the connector with it's edges riding in the guide channel. It will be appreciated by those skilled in the art that other methods may be employed for securing the terminal in the connector.
  • the housing 14 includes a pair of opposed lower end walls 32 which are joined to sidewalls 18 formig a lower elongated cavity 34.
  • elongated cavity 34 includes a peripheral edge 36 which defines a tapered opening 38 for receiving a terminal pin 12.
  • the housing 14 further includes a pair of opposed webs 40 which are spaced from lower end walls 32 and which join sidewalls 18.
  • the upper edges 42 of webs 40 are located above the upper edges 44 of lower end walls 32.
  • upper edges 42 and 44 may be gently curved to define a flattened "U" shape.
  • Housing 14 may be any suitable insulating material such as thermoplastic, e.g., unfilled polyester, which is generally injection molded.
  • the terminal 16 includes an IDC 46 having a pair of blades 48 defined by a line of cut 50.
  • a strain relief aperature 52 can be provided at the base of cut 50. This aperture tends to prevent propagation of the cut beyond its intended limit.
  • the ends of blades 48 are tapered inwardly as shown defining a "V" shaped entryway 54 which guides the entry of a wire.
  • the edges of IDC 46 can be tapered outwardly and shaped to ride in the guide channel formed by slots 28.
  • the lower portion of terminal 16 comprises a beam 56 which is integrally joined to IDC 46 and shaped and relieved to conform to the inner contours of the connector housing.
  • beam 56 an elongated strip of sheet metal, may be formed into other shapes for mating to various forms of electrical devices such as substrates, boards and pins.
  • the terminals 16 may be stamped or cut from any suitable strip conducting material, such as phospor/bronze or other copper alloy.
  • the terminals are formed from spring tempered strip material having a thickness of about .008 to .025 inch (0.203 to 0.635 mm). It will be appreciated by those skilled in the art that the line of cut will open up generally parabolically as a wire is inserted. However, the IDC may be prestressed, i.e., the'line of cut may be opened slightly in the die during the stamping operation, before it is mounted in the connector.
  • a wire to be terminated is located in the tapered access to the connector as shown in Figure 3.
  • a suitable insertion tool 60 is employed to move the wire into the connector, flexibly displacing prongs 24.
  • the termination is accomplished as wire 11 is inserted in the connector to a depth just below the trailing edges 26 of prongs 24 and blades 48 cut the insulation and positively contact the wire's conductor.
  • prongs 24 tend to return to their initial position so that trailing edges 26 rest against the upper surface of the wire's insulation.
  • flexible prongs 48 prevent a terminated wire from moving upwardly out of the connector while at the same time upper edges 44 prevent the wire from being moved downwardly into the connector any farther than is necessary for the conductor to reliably contact blades 48.
  • One of the most important features of this invention is that it provides the capability to successfully terminate wires varying greatly in size, for example, wires ranging from 22 awg to 30 awg on 0.100 inch centers.and from 18 awg to 28 awg on 0.156 inch centers. Wires can be terminated according to the following procedure :
  • Figure 7 is a schematic representation of the interrelationship between the force deformation curves for the family of wires of interest and the force displacement curves of the IDC. The places where a wire and an IDC curve intersect are points of equilibrium between wire and the IDC. This type of representation of IDC versus wire is well known to those familiar with the IDC art.
  • the IDC's which are suitable for use in this invention are relatively small, e.g., usually only about 0.100 to0.200 inches long (2.5 to 5.0 mm). Such small IDC's tend to exhibit a large amount of plastic deformation when their displacement is relatively large and their stiffness is relatively high.
  • Figure 7 also shows that the IDC behavior when terminating smaller wire is markedly different when the larger wire is terminated.
  • the IDC stiffness is lower because the wire is placed relatively less deep into the line of cut, and little or no plastic deformation occurs in the IDC because of the small displacement caused by the smaller diameter wire. Again, however, the equilibrium between IDC and wire falls within the range of satisfactory wire deformation.
  • the connector system performance for intermediate size wires is also quite satisfactory.
  • the large wire would be about 22 awg and the small wire would be about 30 awg.
  • the width of the guide channel in which the IDC rides is no more than twice the thickness of the terminal, and preferably no more than 1.5 times the terminal thickness.
  • the blades of the IDC are restrained and prevented from skewing.
  • Figure 2 illustrates a wire having been terminated at its end.
  • Figure 5 illustrates a wire terminated mid-span.
  • the upper edge 42 of web 40 cooperate with the trailing edge 26 of prong 24 to impart an "S" bend in a wire as it is terminated.
  • the "S" bend is an important strain relief feature which practically eliminates movement of the wire conductor relative to the IDC.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
  • Multi-Conductor Connections (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
EP81201330A 1980-12-05 1981-12-04 Verbinder für diskrete Kabel mit Isolationsverschiebung Withdrawn EP0055876A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US21332680A 1980-12-05 1980-12-05
US213326 1980-12-05

Publications (2)

Publication Number Publication Date
EP0055876A2 true EP0055876A2 (de) 1982-07-14
EP0055876A3 EP0055876A3 (de) 1982-08-04

Family

ID=22794669

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81201330A Withdrawn EP0055876A3 (de) 1980-12-05 1981-12-04 Verbinder für diskrete Kabel mit Isolationsverschiebung

Country Status (5)

Country Link
EP (1) EP0055876A3 (de)
JP (1) JPS57121173A (de)
KR (1) KR830008425A (de)
BR (1) BR8107870A (de)
GB (1) GB2089147A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2197548A (en) * 1986-11-07 1988-05-18 Amp Inc I.D.C terminal block with cable clamps
WO1994008362A1 (en) * 1992-09-30 1994-04-14 Weidmuller (Klippon Products) Limited Electric connector

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5949167A (ja) * 1982-08-09 1984-03-21 モレツクス・インコ−ポレ−テツド マルチゲ−ジ絶縁体排除コネクタ−とそのためのコンタクト
US4701138A (en) * 1986-12-18 1987-10-20 Phoenix Terminal Blocks Inc. Solderless electrical connector
US5364288A (en) * 1992-07-24 1994-11-15 North American Philips Corporation Electrical connecting device
JP6651393B2 (ja) * 2016-03-25 2020-02-19 日本圧着端子製造株式会社 圧接コンタクト及び圧接コネクタ
JP6723567B2 (ja) * 2018-10-22 2020-07-15 日本圧着端子製造株式会社 コネクタ

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4159158A (en) * 1977-05-06 1979-06-26 Amp Incorporated Displation connector having improved terminal supporting means
EP0004780A2 (de) * 1978-04-10 1979-10-17 AMP INCORPORATED (a New Jersey corporation) Elektrischer Verbinder
US4178055A (en) * 1975-05-12 1979-12-11 Amp Incorporated Connecting device for connecting pairs of wires
EP0008827A1 (de) * 1978-08-21 1980-03-19 E.I. Du Pont De Nemours And Company Elektrische Verbindung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4178055A (en) * 1975-05-12 1979-12-11 Amp Incorporated Connecting device for connecting pairs of wires
US4159158A (en) * 1977-05-06 1979-06-26 Amp Incorporated Displation connector having improved terminal supporting means
EP0004780A2 (de) * 1978-04-10 1979-10-17 AMP INCORPORATED (a New Jersey corporation) Elektrischer Verbinder
EP0008827A1 (de) * 1978-08-21 1980-03-19 E.I. Du Pont De Nemours And Company Elektrische Verbindung

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2197548A (en) * 1986-11-07 1988-05-18 Amp Inc I.D.C terminal block with cable clamps
GB2197548B (en) * 1986-11-07 1991-01-02 Amp Inc Electrical connector housing having connector-retention means.
WO1994008362A1 (en) * 1992-09-30 1994-04-14 Weidmuller (Klippon Products) Limited Electric connector
US5641302A (en) * 1992-09-30 1997-06-24 Weidmuller (Klippon Products) Limited Electric connector having gripping surfaces for assembling connector to cable

Also Published As

Publication number Publication date
EP0055876A3 (de) 1982-08-04
KR830008425A (ko) 1983-11-18
JPS57121173A (en) 1982-07-28
GB2089147A (en) 1982-06-16
BR8107870A (pt) 1982-09-08

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19830510

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Inventor name: KEY, EDWARD HARVEY