EP0416306B1 - Elektrisches Kontaktelement - Google Patents

Elektrisches Kontaktelement Download PDF

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Publication number
EP0416306B1
EP0416306B1 EP90115232A EP90115232A EP0416306B1 EP 0416306 B1 EP0416306 B1 EP 0416306B1 EP 90115232 A EP90115232 A EP 90115232A EP 90115232 A EP90115232 A EP 90115232A EP 0416306 B1 EP0416306 B1 EP 0416306B1
Authority
EP
European Patent Office
Prior art keywords
contact element
electrical contact
spring
fork spring
aperture
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
EP90115232A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0416306A1 (de
Inventor
Horst Ribbeck
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.)
Stocko Metallwarenfabriken Henkels and Sohn GmbH and Co
Original Assignee
Stocko Metallwarenfabriken Henkels and Sohn GmbH 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 Stocko Metallwarenfabriken Henkels and Sohn GmbH and Co filed Critical Stocko Metallwarenfabriken Henkels and Sohn GmbH and Co
Publication of EP0416306A1 publication Critical patent/EP0416306A1/de
Application granted granted Critical
Publication of EP0416306B1 publication Critical patent/EP0416306B1/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
    • H01R4/2445—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
    • H01R4/245—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 additional means having two or more slotted flat portions
    • H01R4/2454—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 additional means having two or more slotted flat portions forming a U-shape with slotted branches
    • 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
    • H01R4/245—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 additional means having two or more slotted flat portions
    • 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
    • H01R13/02—Contact members
    • H01R13/10—Sockets for co-operation with pins or blades
    • H01R13/11—Resilient sockets
    • H01R13/113—Resilient sockets co-operating with pins or blades having a rectangular transverse section

Definitions

  • the invention relates to an electrical contact element to be arranged in a chamber of a plastic housing and bent from a flat sheet-metal stamped part in insulation displacement technology of an electrical cable plug connection, a flat fork spring defining an insertion slot for the insulation displacement contacting of an electrical cable between its two fork spring legs which can be elastically bent out in the plane of the fork spring is surrounded by insulation, and wherein the flat fork spring has an opening.
  • Electrical contact elements in the so-called insulation displacement technology for electrical cable plug connections are known. They are punched out of a sheet and bent according to the given shape. An electrical contact element produced in this way is then arranged in a corresponding chamber of a plastic housing of the cable plug connection, after which the corresponding electrical cable is contacted on the electrical contact element in insulation displacement technology.
  • the electrical contact element has at least one fork spring, which defines an insertion slot between them, the mutually facing edges of the two fork spring legs being sharpened. To make contact with the electrical cable, insert it into the insertion slot the fork spring inserted so that the cutting of the two fork spring legs carve the cable insulation so that they come into electrical contact with the electrical conductor. The two fork spring legs exert a clamping force on the electrical conductor so that it is held in the insertion slot.
  • the fork spring legs of the fork spring are formed by punching out a slot that is open at one end, the spring travel of the two legs is small due to the small effective spring length and thus lever arm length. Since the two fork spring legs can thus only slightly move out of their position and the width of the insertion slot can therefore only be increased to a small extent due to the low flexibility of the fork spring legs, the insertion of the electrical cable to be contacted is thereby made more difficult. This applies in particular when electrical cables with different conductor diameters are to be contacted in one and the same type of electrical contact element.
  • the two fork spring legs due to their low flexibility due to the low spring travel, reduce the contact pressure, especially on a strand bundle, with the internal stability of the strand bundle decreasing over a long period of time, and due to the fact that the contact pressure of the fork spring legs decreases over time due to material fatigue (relaxation) will be poorly maintained.
  • the insulation displacement contact of the electrical conductors is poor in the known electrical contact elements.
  • a generic contact element is known from US-A-40 66 317. It is a contact element with relatively long fork spring legs. Below the fork spring there is an opening, leaving an intermediate web, which serves to be able to bend the previously known contact element in this area slightly by about 90 ° in order to prepare it for installation in a corresponding plug element.
  • this opening cannot improve the insulation displacement contact of the contact element, since the perforated area is bent, so that the remaining legs no longer have any mobility, since they are fixed by the parts which are angled by approximately 90 °.
  • EP-A-02 03 639 Another contact element is known from EP-A-02 03 639, which comprises a fork spring which is open in the idle state and which is compressed in the state inserted into a housing. A further insertion slot in the form of an opening is formed below the insertion slot. A solid web remains between the two insertion slots. Since the insulation displacement contacting is brought about by compressing the fork spring, the rest of the contact element area has no influence on the contacting quality.
  • the object of the invention is to further develop the known electrical contact element using insulation displacement technology of an electrical cable plug connection to the effect that the insulation displacement contacting of the electrical cables is improved.
  • An electrical contact element designed according to this technical teaching in insulation displacement technology of an electrical cable plug connection has the advantage that, with regard to the known fork springs, the spring travel and thus the flexibility of the fork spring legs is increased while maintaining the clamping force, so that the insulation displacement contacting of the electrical cable is improved overall. This is due to the formation of the additional opening in the fork spring, an intermediate web being left between this opening and the insertion slot. Since the clamping force depends directly on the design of the insertion slot and on the design of the fork spring legs delimiting the insertion slot, but not through the formation of an additional opening with the fork spring, the clamping force is not impaired by the additional opening and therefore remains the same.
  • the additional opening forms two pivot points or joints, namely the first pivot point or the first joint in the region of the intermediate web between the insertion slot and the opening and the second pivot point or the second joint in the region of the end of the additional opening facing away from the insertion slot.
  • the opening is preferably symmetrical to the longitudinal axis of the insertion slot. This has the advantage that the same conditions prevail in both fork spring legs of the fork spring.
  • the opening preferably extends directly to the insertion slot.
  • the opening is essentially designed as an elongated slot which, in a further development, tapers towards the insertion slot.
  • the opening has an essentially triangular shape.
  • the slot forming the opening can preferably taper substantially at the end facing away from the insertion slot, so that overall an optimal bending behavior results.
  • the invention further relates to an electrical cable plug connection with at least one electrical contact element arranged in a chamber of a plastic housing, which is designed in the manner described above.
  • FIGS. 3a and 3b show an embodiment of an electrical contact element using insulation displacement technology of an electrical cable connector, while the special properties of the electrical contact element are to be explained with reference to FIGS. 3a and 3b.
  • the electrical contact element 1 in FIGS. 1 and 2 consists of a stamped sheet metal part, from which the electrical contact element 1 is bent by successive bending processes. From the flat sheet metal stamping is then obtained an electrical contact element 1, as shown in FIGS. 1 and 2.
  • This electrical contact element 1 has two pairs of spring tongues 2, between which, for example, the contact pin of a plug of the electrical plug connection for electrical contacting can be inserted.
  • These spring tongues 2 are formed in a conventional manner.
  • the electrical contact element In order to be able to contact an electrical cable 3 in the so-called insulation displacement technology on the electrical contact element 1, the electrical contact element has two fork springs 4. Each of these fork springs 4 consists of two fork spring legs 5, which define an insertion slot 6 for the electrical cable 3 between them.
  • the fork springs 4 each have an elongated, slot-like opening 7, which extends as close as possible to the insertion slot 6, leaving an intermediate web 8. This opening 7 tapers towards the insertion slot 6, while the opening 7 also tapers towards the other end.
  • the electrical cable 3 To contact the electrical cable 3, it is inserted from above into the insertion slot 6, as indicated in FIG. 3a in the schematic illustration of a fork spring 4. Since the mutually facing edges of the two fork spring legs 5 are sharpened, the fork spring legs 5 cut into the insulation 9 of the electrical cable 3 until the fork spring legs 5 come into contact with the electrical conductor 10 and thus establish the electrical contact.
  • FIG 3a shows, in a purely schematic manner, a fork spring 4 of an electrical contact element with its fork spring legs 5 delimiting the insertion slot 6 and the opening 7.
  • the fork spring 4 forms lateral spring leg sections 11 in the area of its opening 7, each of which connects to the fork spring legs 5 at the rear.
  • the clamping force F with which the two fork spring legs 5 press against the electrical cable, depends on the design of the fork spring legs 5 and on the design of the insertion slot 6.
  • the clamping force F is independent of the additional design of the opening 7, so that the clamping force F is unaffected by this.
  • the effective spring length which defines the spring travel f and thus the flexibility of the fork spring legs 5, is predetermined by the lengths l and a shown, the greatest possible spring travel f being indicated by dashed lines in FIG. 3b.
  • the length l is the effective spring length if there were no opening 7, that is to say in the case of a conventional electrical contact element.
  • the length l is defined by the distance between the center of the intermediate web 8 and the center of the contacted electrical cable 3.
  • the length a is defined by the distance between the center of the intermediate web 8 and the end facing away from the insertion slot 6 of the spring leg sections 11 in the region of the base 12 of the opening 7.
  • the center point of the intermediate web 8 forms a pivot point D 1 or a joint and the end of the spring leg section 11 facing away from the insertion slot 6 forms a pivot point D a in the region of the base 12 of the opening 7.
  • Fig. 3b the bending behavior of the right fork spring leg 5 and the right spring leg portion 11 of the fork spring 4 in Fig. 3a is shown in a purely schematic manner with contacted electrical cable 3.
  • the fork spring legs 5 and the spring leg section 11 form a continuous spring which is fixed at one end (in the drawing below) at the pivot point D a and at a distance from the other end (in the drawing above) at the pivot point D l .
  • pivots D a and D l form the fixed points when the spring is bent in such a way that the spring leg section 11 is curved to the left in the drawing, while the freely projecting fork spring leg 5 is bent in the opposite direction, so that there is a substantially continuous transition from the spring leg section 11 to the fork spring leg 5 results.
  • the spring travel f and thus the flexibility of the fork spring leg is thereby 5 increases without the clamping force F exerted by the fork spring legs 5 being impaired.
  • the insulation displacement contacting of the electrical cable 3 is thus improved, since the opening 7 according to the invention increases the flexibility of the fork spring legs 5.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
EP90115232A 1989-09-08 1990-08-08 Elektrisches Kontaktelement Expired - Lifetime EP0416306B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3929928A DE3929928C1 (enrdf_load_stackoverflow) 1989-09-08 1989-09-08
DE3929928 1989-09-08

Publications (2)

Publication Number Publication Date
EP0416306A1 EP0416306A1 (de) 1991-03-13
EP0416306B1 true EP0416306B1 (de) 1994-11-02

Family

ID=6388942

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90115232A Expired - Lifetime EP0416306B1 (de) 1989-09-08 1990-08-08 Elektrisches Kontaktelement

Country Status (3)

Country Link
US (1) US5088933A (enrdf_load_stackoverflow)
EP (1) EP0416306B1 (enrdf_load_stackoverflow)
DE (2) DE3929928C1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29504996U1 (de) * 1995-03-24 1995-07-13 Stocko Metallwarenfab Henkels Elektrisches Kontaktelement

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9203355U1 (de) * 1992-03-12 1993-07-15 Grote & Hartmann Gmbh & Co Kg, 5600 Wuppertal Elektrisches Kontaktelement mit Schneidklemmen
DE4329813C2 (de) * 1993-09-03 1996-07-04 Grote & Hartmann Elektrisches Kontaktelement
DE4332194C1 (de) * 1993-09-22 1994-12-01 Fischer Georg Rohrleitung Verfahren zum Herstellen eines Kunststofformteils und Formteile
DE4335828A1 (de) * 1993-10-20 1995-04-27 Grote & Hartmann Elektrische Flachsteckkontaktbuchse
DE4403278C2 (de) * 1994-01-31 1997-12-04 Krone Ag Schneidklemm-Kontaktelement
DE9416055U1 (de) * 1994-10-06 1996-02-01 Stocko Metallwarenfabriken Henkels Und Sohn Gmbh & Co, 42327 Wuppertal Flachsteckhülse mit Schneidkontakt
DE29506206U1 (de) * 1995-04-10 1995-08-24 Siemens AG, 80333 München Kontaktfeder
AU3284400A (en) * 1999-03-12 2000-10-04 Grote & Hartmann Gmbh & Co. Kg Electrical plug-in connector with at least one insulation displacement contact element consisting of a sheet metal stamping, and corresponding mating connector
US6247961B1 (en) 2000-06-27 2001-06-19 Group Dekko Services, Llc Distribution wiring harness assembly
GB0110767D0 (en) * 2001-05-02 2001-06-27 Delphi Tech Inc Female electrical terminal
US6638118B2 (en) 2001-06-19 2003-10-28 Group Dekko Services, Llc Distribution wiring harness assembly
DE102009006828A1 (de) * 2009-01-30 2010-08-05 Tyco Electronics Amp Gmbh Schneidklemmkontakt mit Entkopplungsstelle und Kontaktanordnung mit Schneidklemmkontakt
CN101982904A (zh) * 2010-08-31 2011-03-02 上海航天科工电器研究院有限公司 功率接触构件
CH712661B1 (de) * 2016-07-11 2018-10-31 Hager Ind Ag Modulare Klemme zum Klemmen von Litzen und Hartadern für Steckdosen.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3234498A (en) * 1963-06-04 1966-02-08 Western Electric Co Insulation-penetrating clip-type electrical connectors
US4066317A (en) * 1976-09-30 1978-01-03 Western Electric Company, Inc. Electrical conductor terminating system
US4088382A (en) * 1976-12-01 1978-05-09 Japan Aviation Electronics Industry, Ltd. Connecting structure of terminals
US4405193A (en) * 1981-06-08 1983-09-20 Amp Incorporated Preloaded electrical connector
GB2168858B (en) * 1984-12-21 1988-10-05 Egerton A C Ltd Electrical contact or terminal
JPS61179671U (enrdf_load_stackoverflow) * 1985-04-30 1986-11-10
US4889006A (en) * 1988-03-24 1989-12-26 Briggs & Stratton Corporation Engine speed control cable clip attachment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29504996U1 (de) * 1995-03-24 1995-07-13 Stocko Metallwarenfab Henkels Elektrisches Kontaktelement

Also Published As

Publication number Publication date
DE59007618D1 (de) 1994-12-08
US5088933A (en) 1992-02-18
DE3929928C1 (enrdf_load_stackoverflow) 1990-11-22
EP0416306A1 (de) 1991-03-13

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