EP0025368B1 - Elektrische Kontaktbuchse - Google Patents

Elektrische Kontaktbuchse Download PDF

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Publication number
EP0025368B1
EP0025368B1 EP80400870A EP80400870A EP0025368B1 EP 0025368 B1 EP0025368 B1 EP 0025368B1 EP 80400870 A EP80400870 A EP 80400870A EP 80400870 A EP80400870 A EP 80400870A EP 0025368 B1 EP0025368 B1 EP 0025368B1
Authority
EP
European Patent Office
Prior art keywords
sleeve
contact
receiving opening
fingers
supporting sleeve
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
Application number
EP80400870A
Other languages
English (en)
French (fr)
Other versions
EP0025368A1 (de
Inventor
Charles Pitman Fischer
Gary Clifford Toombs
David Otis Gallusser
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.)
Bendix Corp
Original Assignee
Bendix Corp
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 Bendix Corp filed Critical Bendix Corp
Publication of EP0025368A1 publication Critical patent/EP0025368A1/de
Application granted granted Critical
Publication of EP0025368B1 publication Critical patent/EP0025368B1/de
Expired 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
    • 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
    • H01R13/111—Resilient sockets co-operating with pins having a circular transverse section
    • 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
    • H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
    • H01R13/42—Securing in a demountable manner
    • H01R13/426—Securing by a separate resilient retaining piece supported by base or case, e.g. collar or metal contact-retention clip

Definitions

  • This invention relates to a socket contact for a separable electrical connector of the type including first and second connector members.
  • Separable electrical connectors of the plug and receptacle type are used in many applications for connecting multiple pairs of corresponding conductors. Such connectors are widely used in the aerospace field and complex electronic systems in which a single connector may connect hundreds of pairs of wires. In such systems, the connectors must be miniaturized to minimize the weight and size.
  • the wires at the receptacle are connected to individual terminals and the wires at the plug are connected to corresponding terminals.
  • each of the terminals in one of the connectors is a socket contact
  • each of the terminals in the other connector is a pin contact and the pin contacts are adapted to telescopically engage with the corresponding socket contacts when the plug and receptacle are in a mated relationship.
  • the pin and socket contacts need to be very small; for example, the socket contact may be less than 2.5 mm in diameter and less than 13 mm in a length.
  • Connectors of the type described must be capable of quick and easy connection and disconnection without undue force. Yet each set of contacts must provide excellent electrical conductivity and be capable of repeated connections and-disconnections without damage or significant deterioration.
  • miniature contacts were first introduced, they were manufactured by machining from metal stock since that was the only feasible way to hold the tolerances required for the mating the contacts.
  • machined contacts are relatively costly. In recent years such contacts have been made from sheet metal by forming and rolling to produce a "formed" contact.
  • Formed socket contacts have been developed which comprise an assembly of contact sleeve or liner of spring metal having plural contact fingers at the mating end and a supporting sleeve thereon.
  • the wire receiving end is provided with plural openings and has a supporting sleeve thereon and is crimped into engagement with the wire.
  • a mounting flange is provided in the midsection of the contact sleeve.
  • the inner sleeve has an open seam from one end to the other, i.e. the abutting edges of the rolled sleeve are not welded or brazed together.
  • a socket contact of this construction and method of making are described in US-A-4 072 394.
  • Formed contacts with welded or brazed seams are disclosed in the following patents: US-A-3 286 223; US-A-3 317 887; and US-A-3 721 943.
  • the contact fingers constitute cantilever beams deflected in a radial direction by the insertion of the mating pin contact.
  • Each of the contact fingers is supported only at its root in the contact sleeve.
  • an electric socket contact comprising an elongate sleeve having a wire receiving opening at a rear end and a pin contact receiving opening comprising an annulus formed of resilient contact fingers at a forward mating end, characterized in that a supporting sleeve is disposed in external coaxial relation with said elongated sleeve, an outer sleeve is disposed in external coaxial relation with said supporting sleeve and there is provided mounting means for immovably securing the supporting sleeve to the outer sleeve whereby the supporting sleeve has its rearward end adjacent the wire receiving opening and its forward end extending slightly beyond the forward ends of the contact fingers, said outer sleeve including guide means providing a socket entrance for guiding the pin into centered relation with the annulus at the forward mating end, the wall of the elongated sleeve defining slots extending axially from a mating end and thereby providing contact fingers
  • the invention thus provides a socket contact which exhibits a desired contact force and a centering action upon entry of a cooperating contact pin.
  • the socket contact comprises a contact liner of the formed type, i.e. it is fabricated from thin sheet metal by stamping and rolling.
  • the contact is adapted for mounting in a dielectric insert of an electrical connector member and for telescopic engagement with a pin contact mounted on a mating connector member.
  • the socket contact 10 comprises a contact liner or sleeve 12 disposed in co-axial relationship within a supporting sleeve 14 which extends substantially the full length of the contact sleeve.
  • An outer sleeve or front hood 16 is disposed in co-axial relation over the supporting sleeve 14 and extends from the pin receiving or mating end 18 to a point near the midsection of the contact sleeve 12.
  • the back end of the contact 10 terminates in a wire receiving opening 20 which receives a conductor or wire 22.
  • the mating end 18 at the front of the contact is adapted to receive a pin contact 24.
  • FIGURE 3 shows a fragmentary view of an electrical connector of the type of which the socket contact of this invention may be used.
  • the electrical connector comprises a re- ceptable 30 which contains a dielectric insert 32 in which are mounted a plurality of socket contacts 10.
  • the electrical connector also includes a plug 34 which contains a dielectric insert 36 in which are mounted a plurality of pin contacts 24.
  • the receptacle 30 and the plug 34 are adapted to be oriented and drawn together in a mated relationship (by means not shown) so that the pin contact 24 is telescopically inserted into the socket contact 10 to provide an electrical connection therebetween.
  • the insert 32 defines a recess 35 which contains a retention device 40.
  • the socket contact 10 is mounted in the insert 32 by the contact retention device 40 which includes plural deflectable spring fingers 42 which engage a rearward shoulder 44 on the socket contact 10.
  • the socket contact 10 is inserted from the rear of the insert through the retention device and the spring fingers 42 deflect to allow the hood 16 to pass by and then the fingers seat against the rear shoulder 44. Accordingly, the socket contact 10 is maintained in a fixed position within the insert.
  • the contact sleeve 12 is formed from a resilient sheet metal, preferably a beryllium copper alloy, by stamping and rolling process.
  • the process of forming the sleeve 12 is suitably that described in the above cited U.S. Patent No. 4,072,394.
  • a contact blank 12' which has been stamped from sheet metal for forming contact sleeve 12 is shown in FIGURE 4.
  • the contact sleeve 12 comprises a cylindrical portion 50 having an open seam 46 which is formed by the abutting or closely spaced, longitudinally extending edges 52 and 54 of the portion 50.
  • the contact sleeve 12 is provided with an oblique flange 56 at the rearward or wire receiving end 20 to serve as a stop or locating shoulder for the supporting sleeve 14. Adjacent the wire receiving end 20 of the contact sleeve 12 the wall thereof defines a set of five elongated openings 58 which are equally spaced circumferentially of the sleeve with one of the openings 58 being centered on the open seam 46. At a position forward of the openings 58 the contact sleeve 12 is provided with a plurality of annular inwardly directed ribs 60. As shown in FIGURE 2, the wire receiving end 20 of the contact sleeve 12 receives the end of the wire 22.
  • An inwardly directed stop tab 62 is provided by lancing a portion of the walls of the supporting sleeve 14 and the contact sleeve 12.
  • the tab 62 is located diametrically opposite the open seam 46.
  • the wire 22 is stripped of insulation at its end and the bare conductor is inserted into the contact sleeve 12 and seated against the stop tab 62.
  • the double wall thickness of the contact sleeve 12 and the supporting sleeve 14 is crimped inwardly at four equally spaced locations to provide indentations 64, as shown in FIGURE 9, whereby the contact sleeve 12 is crushed inwardly against the bare wire to provide a good electrical and mechanical connection.
  • contact sleeve 12 is provided with a set of three equally spaced tines or contact fingers 66 at the forward or mating end 18 of the sleeve 12.
  • the contact fingers 66 are formed by punching two equally spaced slots 68 into the sheet metal of the contact sleeve 12 while it is in a flat condition.
  • the slots 68 extends from the pin mating end 18 of the contact sleeve 12 to a location adjacent midsection of this sleeve and each slot 68 terminates in an arcuate configuration at the root of the contact fingers 66.
  • the contact sleeve 12 in that portion extending from the root of the fingers 66 to the free ends of the fingers is tapered to a smaller diameter at the mating end 18.
  • each of the contact fingers 66 slopes radially inwardly at its free end.
  • the contact sleeve 12 is heat treated so that the contact fingers 66 are stress-relieved in the tapered position illustrated. Additionally, the free ends of the fingers 66 are coined to provide bevelled ends 70 to facilitate entry of the pin contact 24 into the contact sleeve 12.
  • the supporting sleeve 14 as shown in FIGURES 1 and 7 is a cylindrical metal tube.
  • the sleeve 14 is preferably constructed of stainless steel and is formed by deep drawing to provide a tube having a relatively thin wall of a few hundredths of a millimeter in thickness.
  • the supporting sleeve 14 is provided with an annular, outwardly extending flange 76.
  • the supporting sleeve 14 is disposed externally of the contact sleeve 12 and, as shown in FIGURE 1, the rearward end 78 thereof is in abutting engagement with the stop shoulder 56 on the contact sleeve 12.
  • the forward end 80 of the supporting sleeve 14 extends slightly beyond the ends of the contact fingers 66.
  • the forward end of the supporting sleeve 14 is radially spaced from the contact fingers 66 leaving room for radial deflection of the fingers upon the entrance of the pin contact 24.
  • the annular flange 76 on the supporting sleeve 14 is located near the midsection of the contact sleeve 12 and serves to secure the mounting flange 44 which is formed on the outer sleeve or hood 16.
  • the supporting sleeve 14, as shown in FIGURE 2 is interlocked with the contact sleeve 12 by means of the tab 62 and it serves as a support structure for the contact sleeve 12 in the formation of the crimped indentations 64.
  • the outer sleeve or hood 16, as shown in FIGURES 1 and 8 is a cylindrical tube disposed in external co-axial relation with the supporting sleeve 14.
  • the hood 16 is preferably made of stainless steel by a deep drawing operation and has a wall thickness of a few hundredths of a millimeter.
  • the forward end of the hood 16 is provided with an inwardly turned annular bight 86 which forms an annular channel 88 adapted to receive the forward end 80 of the supporting sleeve 14.
  • the rearward end of the hood 16 has an enlarged diameter to form a bell mouth 44' which is adapted to fit over the annular flange 76 on the supporting sleeve 14.
  • the bell mouth 44' thereof is rolled over the flange 76 to provide the annular retention flange 44, as shown in FIGURE 1.
  • the annular bight 86 provides a socket entrance adapted to guide the mating contact pin 24 into centered relationship with the contact fingers 66.
  • the inside diameter of the annular bight 86 is substantially the same as the outside diameter of the bevelled surfaces 70 and there is a small axial spacing between the end of the bight 86 and the ends of the fingers.
  • the socket contact 10 As described above, the socket contact 10, as shown in FIGURE 1, is connected with a wire 22 and is mounted in a connector as shown in FIGURE 3.
  • the socket contact 10 is positioned in the insert parts 33 and 32 with the fingers 42 of the retaining device 40 seated against the rearward face of the flange 44.
  • the pin contact 24 on the plug 34 is axially aligned with the socket contact 10 and when the plug and receptacle are drawn together the pin contact 24 is telescopically inserted into the socket contact 10.
  • the contact fingers 66 are first engaged by the pin at the bevelled surfaces 70 which facilitate entrance of the pin contact and minimize the axial loading on the contact fingers.
  • the contact fingers are radially deflected as the pin contact enters the socket contact.
  • the three contact fingers 66 exert radial forces on the pin contact and due to the equal angular spacing thereof, the pin and socket contacts tend to remain on center with each other.
  • Each of the three contact fingers exerts a normal force against the pin contact due to the resiliency of the fingers and maintains a good electrical contact therewith.
  • the normal force exerted by the three contact fingers, and hence the axial resisting force against the pin contact is less than that provided in a socket contact of the same materials and dimensions but having two contact fingers instead of three; additionally the third contact finger enhances the electrical contact.
  • the contact sleeve 12 of this invention having three contact fingers is especially well adapted to fabrication by stamping and rolling as compared to socket contacts with two or four contact fingers, especially where the open seam 46 is disposed diametrically opposite one of the contact fingers.

Landscapes

  • Connector Housings Or Holding Contact Members (AREA)

Claims (6)

1. Elektrischer Buchsenkontakt mit einer länglichen Buchse (12), die eine einem Draht aufnehmende Öffnung an einem hinteren Ende und eine einen Stiftkontakt aufnehmende Öffnung an einem vorderen Passende aufweist, welche einen aus elastischen Kontaktfingern (66) gebildeten Ring umfasst, dadurch gekennzeichnet, daß eine Lagerbuchse (14) in äußerer koaxialer Lage relativ zu der länglichen Buchse (12) angeordnet ist, daß eine äußere Buchse (16) in äußerer koaxialer Lage relativ zu der Lagerbuchse (14) angeordnet ist, daß Montageeinrichtungen (44, 76) zur unbeweglichen Befestigung der Lagerbuchse (14) an der äußeren Buchse (16) vorgesehen sind, so daß das hintere Ende (78) der Lagerbuchse (14) benachbart zu der den Draht aufnehmenden Öffnung angeordnet ist und sich das vordere Ende (80) der Lagerbuchse geringfügig über die vorderen Enden der Kontaktfinger hinaus erstreckt, daß die äußere Buchse (16) Führungseinrichtungen (86) aufweist, die eine Buchseneinführung zum Führen des Stiftes in eine zentrierte Lage relativ zu dem Ring an dem vorderen Passende bilden, daß in der Wand der länglichen Buchse (12) Schlitze (68) angeordnet sind, die sich in Axialrichtung von einem Passende (18) aus erstrecken und dadurch Kontakfinger (66) bilden, daß jeder Kontakfinger (66) sich in Form eines auskragenden Trägers erstreckt und ein freies Ende aufweist und daß drei Schlitze (68) vorgesehen sind, die gleiche Umfangsabstände voneinander aufweisen, so daß auf diese Weise ein Satz von drei in gleichen Abständen angeordneten Kontaktfingern (66) gebildet wird.
2. Elektrischer Buchsenkontakt nach Anspruch 1, dadurch gekennzeichnet, daß die Montageeinrichtungen (44, 76) in der Mitte der Lagerbuchse (14) einen auswärts verlaufenden Flansch (76) und am hinteren Ende der äußeren Buchse (16) einen ringförmigen Halteflansch (44) aufweisen, der um den auswärts verlaufenden Flansch (76) herumgepaßt ist.
3. Elektrischer Buchsenkontakt nach Anspruch 1, dadurch gekennzeichnet, daß die Führungseinrichtungen (86) eine ringförmige Ausbuchtung (86) in koaxialer Lage zu dem Ring der Kontaktfinger aufweisen und einen ringförmigen Kanal (88) bilden, der sich um das vordere Ende (80) der Lagerbuchse (14) erstreckt.
4. Elektrischer Buchsenkontakt nach Anspruch 3, dadurch gekennzeichnet, daß er Einrichtungen (62) zur unbeweglichen Befestigung der Lagerbuchse (14) an der Kontaktbuchse aufweist, die einen Finger umfassen, der sich in die Kontaktbuchse zwischen der den Draht aufnehmenden Öffnung erstreckt, sowie die Einrichtungen zur unbeweglichen Befestigung der Lagerbuchse an der äußeren Buchse.
5. Elektrischer Buchsenkontakt nach Anspruch 4, dadurch gekennzeichnet, daß die Kontaktbuchse an der den Draht aufnehmenden Öffnung in einem schief verlaufenden Flansch (56) endet und daß sich das hintere Ende (78) der Lagerbuchse (14) gegen den schief verlaufenden Flansch (56) erstreckt.
6. Elektrischer Buchsenkontakt nach Ansprüch 5, dadurch gekennzeichnet, daß die äußere Buchse (16) und die Lagerbuchse (46) nahtlos ausgebildet sind, daß die längliche Kontaktbuchse eine offene Naht (14) aufweist, die sich zwischen ihren Enden erstreckt und eine Vielzahl von Öffnungen (58) in ihrer Wand benachbart zu der den Draht aufnehmenden Öffnung bildet und daß die Vielzahl der Öffnungen (58) mit Umfangsabstand um die Kontaktbuchse herum angeordnet ist, wobei eine der Öffnungen zu der Naht (46) ausgerichtet ist und die Wand der Lagerbuchse (14) sowie die Wand der Kontaktbuchse zwischen den Öffnungen (58) gegen einen Draht (22), der in der den Draht aufnehmenden Öffnung angeordnet ist, einwärts gefaltet sein können.
EP80400870A 1979-08-31 1980-06-13 Elektrische Kontaktbuchse Expired EP0025368B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US7163979A 1979-08-31 1979-08-31
US71639 1979-08-31

Publications (2)

Publication Number Publication Date
EP0025368A1 EP0025368A1 (de) 1981-03-18
EP0025368B1 true EP0025368B1 (de) 1984-10-17

Family

ID=22102612

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80400870A Expired EP0025368B1 (de) 1979-08-31 1980-06-13 Elektrische Kontaktbuchse

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EP (1) EP0025368B1 (de)
JP (1) JPS5636878A (de)
IL (1) IL60289A0 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4621887A (en) * 1981-03-09 1986-11-11 Allied Corporation Electrical contact
US4447110A (en) * 1982-04-15 1984-05-08 The Bendix Corporation Socket contact for an electrical connector
US4461531A (en) * 1982-09-22 1984-07-24 Bendix/Allied Corporation Socket contact for electrical connector and method of manufacture
JPH0731510Y2 (ja) * 1990-05-16 1995-07-19 矢崎総業株式会社 雌端子金具
CA2215137A1 (en) * 1996-11-06 1998-05-06 Osram Sylvania Inc. Hooded electrical connector
JP3090068B2 (ja) * 1996-11-13 2000-09-18 富士通株式会社 端末装置および記憶装置固定機構
FR2901421B1 (fr) * 2006-05-22 2012-09-21 Cie Deutsch Soc Clip destine a etre dispose dans une cavite d'une partie d'enfichage d'un connecteur electrique
US8465332B2 (en) 2011-01-13 2013-06-18 Tyco Electronics Corporation Contact assembly for an electrical connector
DE102016206914A1 (de) 2016-04-22 2017-10-26 Phoenix Contact E-Mobility Gmbh Leistungskontakt mit auswechelbarem Kontaktbereich
US11450974B2 (en) * 2020-12-29 2022-09-20 Turck Inc. Electrical contact, system and method for manufacturing an electrical contact

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1433878A (en) * 1920-10-18 1922-10-31 Nat Acme Co Feed collet and method of making the same
NL136977C (de) * 1964-12-16
US4072394A (en) * 1976-03-01 1978-02-07 The Bendix Corporation Electrical contact assembly
FR2389250A1 (fr) * 1977-04-25 1978-11-24 Labinal Clip de contact electrique cylindrique
DE2751962A1 (de) * 1977-11-21 1979-05-23 Feinmetall Gmbh Elektrische steckhuelse
US4168878A (en) * 1978-05-22 1979-09-25 Amp Incorporated Pin and socket type electrical terminals

Also Published As

Publication number Publication date
EP0025368A1 (de) 1981-03-18
JPS5636878A (en) 1981-04-10
IL60289A0 (en) 1980-09-16

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