EP0259205B1 - Elektrischer Kontakt für Mehrfachsteckverbinder und Steckverbinder mit solchen Kontakten - Google Patents

Elektrischer Kontakt für Mehrfachsteckverbinder und Steckverbinder mit solchen Kontakten Download PDF

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Publication number
EP0259205B1
EP0259205B1 EP87401802A EP87401802A EP0259205B1 EP 0259205 B1 EP0259205 B1 EP 0259205B1 EP 87401802 A EP87401802 A EP 87401802A EP 87401802 A EP87401802 A EP 87401802A EP 0259205 B1 EP0259205 B1 EP 0259205B1
Authority
EP
European Patent Office
Prior art keywords
contact
connector
shape memory
housing
memory material
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
EP87401802A
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English (en)
French (fr)
Other versions
EP0259205A1 (de
Inventor
Alain Jarry
Paul Djian
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.)
FCI France SA
Original Assignee
Souriau et Cie
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 Souriau et Cie filed Critical Souriau et Cie
Publication of EP0259205A1 publication Critical patent/EP0259205A1/de
Application granted granted Critical
Publication of EP0259205B1 publication Critical patent/EP0259205B1/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
    • H01R4/01—Connections using shape memory materials, e.g. shape memory metal
    • 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
    • H01R13/428—Securing in a demountable manner by resilient locking means on the contact members; by locking means on resilient contact members
    • H01R13/434—Securing in a demountable manner by resilient locking means on the contact members; by locking means on resilient contact members by separate resilient locking means on contact member, e.g. retainer collar or ring around contact member
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S439/00—Electrical connectors
    • Y10S439/932—Heat shrink material

Definitions

  • the present invention relates to an electrical contact for a multi-contact connector and to the connector comprising such electrical contacts.
  • the multicontact connectors currently used and distributed commercially most often include, as shown in longitudinal section in FIG. 1, a male part denoted A and a female part denoted B, the male or female contacts being arranged in blocks.
  • the connector shown is a round connector meeting the specifications of the American standard MILC 482 G.
  • the housing 4 In order to ensure the mechanical retention of the contacts in their housings 4 formed in the insulating blocks, it is necessary to provide a fixing system consisting for each contact in a locking clip 42 constituted by an elastic metal strip. In order to obtain a blocking of each contact by means of the clip, the housing 4 must necessarily have a profile seen in section suitably arranged, as shown in FIG. 1, so as to provide in a chamber shoulders to allow the clip to be wedged. correspondent and / or contact against them.
  • each housing at the level of the chamber results in a significant increase in the diameter of the housing at the level thereof with the effect of limiting the contact population for a given type of connector due in particular to the minimum distance. necessary between two adjacent electrical contacts to ensure the required electrical insulation qualities.
  • insulating blocks provided with their housing being obtained by molding an electrically insulating plastic material, molding can only be carried out in molds having molding pins on which parts, chemically degradable, to the exact dimensions of the desired profile are reported.
  • the object of the present invention is to remedy all of the aforementioned drawbacks by implementing an electrical contact for a multiple connector having a retention system by which the retention of the electrical contact is no longer ensured by wedging but essentially by friction. .
  • Another object of the electrical contact object of the invention is the implementation of a multi-contact electrical connector in which, due to the specific features of the retention system of each contact, the diameter of the housings of each of the electrical contacts is at most equal , substantially, to the diameter or transverse dimension, overall, of the contact body which makes it possible to obtain an increase in the density of contact population for a type of connector of determined dimensions.
  • Another object of the electrical contact which is the subject of the invention is also, due to the particular structure of the retention system, a very great simplification of the operating mode of producing a connector comprising such contacts, the degradation phase of the added parts. on the molding pins being removed or greatly reduced in importance.
  • the electrical contact for a multi-contact connector according to the invention is described in claim 1.
  • the preamble of claim 1 is described in document FR-A-1,500,265.
  • the multicontact connector comprising a plurality of such electrical contacts is described in claim 6.
  • the invention finds application in the production of multicontact electrical connectors used in the aeronautical field, radar systems, and more generally in industrial electronics control and regulation systems.
  • the electrical contact comprises a barrel 1 in which the cable of the electrical connector can be inserted in order to ensure mechanical cohesion and the electrical connection between the electrical contact and the conductors of the cable to be connected.
  • the electrical contact further comprises a retention zone denoted 2 and an active part 3.
  • the active part 3 can be constituted for example, as shown in FIG. 2a, by a female socket intended to receive the corresponding male part of a contact electric male.
  • the barrel 1, the retention zone 2 and the active part 3 are formed by an electrically conductive contact body, the retention zone 2 being formed by a contact zone. reduced section 20.
  • an element 21 made of shape memory material 21 is engaged in the reduced section area intended to ensure the retention of the contact in its housing 4 during assembly. of it.
  • the housing 4 is shown formed in the insulating block 100 of the male or female part of the connector.
  • the element 21 made of shape memory material consists of a sleeve.
  • the element 21 is made so as to have a sufficient longitudinal dimension, in order to exert in a first state of memorized shape, sufficient pressure on the walls of the orifice 4 and a suitable friction against them, the blocking of the contact is thus ensured in its housing.
  • the longitudinal dimension of the sleeve 21 can be reduced.
  • an additional housing 42 can be provided at the wall of the housing 4 at the reduced section area 20 of the electrical contact.
  • the housing 42 may be produced so as to form shoulders on which the sleeve 21 bears, so as to wedge the electrical contact in its housing 4.
  • the shoulders thus formed and the housing 42 can thus, advantageously, be constituted by an offset of small value relative to the corresponding dimension of the electrical contact or of the contact body.
  • the electrical contact has been shown here as consisting of a contact body of substantially circular section.
  • the sleeve 21 can have cut parts 210 intended to block the contact along the wall housing 4.
  • the element 21 of shape memory material can advantageously be made of a material included in the nickel-titanium, nickel-titanium-iron, copper-zinc-aluminum and copper-aluminum-nickel group in the form of an intermetallic compound or in the form ally.
  • the element of shape memory material 21 is capable of reversibly occupying a first state of memorized shape noted I in FIG. 3a in which the element 21, or the cut parts 210 of it, are in an expanded state.
  • the element or the cut parts thereof are thus projecting relative to the contact body in order to allow the retention of the contact in its housing 4 after mounting thereof.
  • the element made of shape memory material 21 is capable of occupying a second state of memorized form denoted II, in which the element, or the cut parts 210 thereof, are in the shrunk state, the element thus being substantially retracted into the reduced section area 20 forming the retention area.
  • the second memorized form state II is shown in FIG. 3b.
  • the transition from the first I to the second II memorized shape state and vice versa is obtained by only varying the temperature of the shape memory element 21 in order to bring it below or above the transition temperature Ms of the material of which it is made.
  • the contact or contacts of a considered connector can advantageously be brought to a temperature at the end of martensitic state corresponding to the state of memorized shape II by lowering their temperature and in particular of the shape memory element 21, by any cold source available in an industrial environment, such as than a source of liquid nitrogen.
  • the memorized state of shape I corresponds to the critallographic state of martensitic type, state in which a large force is applied by the shape memory element 21 to the wall of the housing 4, thus allowing the maintenance of each contact in its corresponding housing.
  • the sleeve 21 or the shape memory element makes it possible to apply to the wall of the housing 4 a force or constraint which, with respect to a metallic element of conventional type of analogous shape, has an amplitude at least two times higher, which allows proper retention of the contacts inside their housing.
  • the shape memory element 21 could advantageously be made up of a composition comprising substantially 4% ⁇ 0.5% aluminum, 27 to 29% zinc, the rest of the percentage being made up of copper .
  • the percentages indicated are in atomic percent. These percentages allow a judicious choice of the various components to determine with a good degree of precision the transition temperature Ms of the alloy considered.
  • the percentages indicated could, for example, correspond to 4% of aluminum, 28% of zinc and the complement of copper, to obtain a transition temperature Ms substantially equal to -80 ° C.
  • the shape memory element 21 constituted by a sleeve or by a sleeve comprising cut parts 210 is subjected, prior to its installation at the level of the reduced cross-section area 20 of the contact, to an education process thus than previously cited.
  • the eduction process that can be used for conditioning the shape memory element 21 of the electrical contact which is the subject of the invention, reference may advantageously be made to the patent application. Europe on behalf of the Applicant published under No. 0,161,952 on November 21, 1985.
  • the connector includes a plurality of electrical contacts as previously described.
  • the housings 4 of the blocks of insulating material of the male part A, respectively female B of the connector are constituted by at most two coaxial cylindrical orifices of different diameter noted 40, respectively 41, so as to form a shoulder with a low offset.
  • connector comprising electrical contacts of 1.06 mm diameter, or a number of contacts equal to 32, it was possible to increase this number of contacts to substantially 70 contacts, while respecting the electrical insulation standards between the various electrical contacts making up the connector.
  • this number of contacts is also possible by assigning a number of contacts greater than 1 for the same electrical connection channel, to obtain a significant increase in the intensity of passage of the corresponding electrical current.
  • the blocks 100 of material insulating from the male parts A, respectively female B, are formed by molding, the corresponding housings 4 being obtained by molding the insulating material in a mold comprising pins molding noted 10, 11, at the dimensions and dimensions of the housings 4.
  • the molding pins 10, 11 are shown in broken lines, the aforementioned molding pins being able to be separated at their common part 110, their removal can be carried out in the respective directions represented by the arrows.
  • FIG. 4b the molding pins 10, 11 are shown in broken lines, the aforementioned molding pins being able to be separated at their common part 110, their removal can be carried out in the respective directions represented by the arrows.
  • the operating mode for producing the blocks insulators 100 is particularly simplified due to the fact of the elimination of the chemical attack phase of inserts on the molding pins, in the absence of the latter.
  • a housing with a low offset pieces added to the molding pins can be used. In this case, these patches have corresponding dimensions of low value and the importance of the chemical attack phase in the operating mode can be reduced, in particular in duration, due to a shorter dissolution time.
  • the electrical contact object of the invention, is particularly advantageous in that it allows the definition of electrical connectors of the new type, that is to say electrical connectors likely to include a much larger number of contacts than the existing connectors currently for the same external dimension.

Landscapes

  • Connector Housings Or Holding Contact Members (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)

Claims (8)

  1. Elektrischer Kontakt für Mehrfach-Steckverbinder, der aufeinanderfolgend eine Buchse (1), eine Rückhaltezone (2) und eine aktive Partie (3) umfaßt, wobei die Buchse (1), die Rückhaltezone (2) und die aktive Partie (3) von einem elektrisch leitenden Kontaktkörper mit im wesentlichen zylindrischer Gestalt geformt ist und die Rückhaltezone (2) einen Bereich verminderten Querschnitts (20) hat, dadurch gekennzeichnet, daß auf dem Bereich verringerten Querschnittes eine Hülse aus einem Werkstoff mit Formgedächtnis sitzt, die dazu bestimmt ist, die Rückhaltung des Kontaktkörpers in seiner Aufnahme (4) während seiner Montage zu gewährleisten.
  2. Elektrischer Kontakt nach Anspruch 1, dadurch gekennzeichnet, daß die genannte Hülse (21) geschlitzte Partien (210) aufweist, um Blockieren des Kontaktkörpers mit der Wand der Aufnahme zu gewährleisten.
  3. Elektrischer Kontakt nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Hülse (21) aus einem Werkstoff mit Formgedächtnis, nämlich aus einem Werkstoff aus der Gruppe Nickel-Titan, Nickel-Titan-Eisen, Kupfer-Zink-Aluminium oder Kupfer-Aluminium-Nickel in der Gestalt einer intermetallischen Verbindung oder einer Legierung besteht.
  4. Elektrischer Kontakt nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß nach einem Lernprozeß der genannten Hülse aus einem Werkstoff mit Formgedächtnis diese folgende Zustände einnehmen kann:
    - einen ersten gemerkten Formzustand (I), bei welchem die genannte Hülse (21) oder die geschlitzten Partien (210) derselben in ausgedehntem Zustand sind, wobei die Hülse somit bezüglich des Kontaktkörpers auskragt, um die Rückhaltung des Kontaktkörpers in seiner Aufnahme (4) während seiner Montage zu gewährleisten,
    - einen zweiten gemerkten Formzustand (II), bei welchem die Hülse (21) oder ihre geschlitzten Partien in zurückgezogenem Zustand sind, wobei die Hülse somit in den Bereich verminderten Querschnitts (20) eingezogen ist, welcher die Rückhaltezone bildet.
  5. Elektrischer Kontakt nach Anspruch 4, dadurch gekennzeichnet, daß der Übergang von dem ersten gemerkten Formzustand (I) in den zweiten gemerkten Formzustand (II) und umgekehrt durch eine alleinige Variation der Temperatur der Hülse mit Formgedächtnis erhalten ist, derart, daß diese zu diesem Übergang ausgehend von der Übergangstemperatur (Ms) und in umgekehrter Richtung ebenfalls ausgehend von der Übergangstempertur (Ms) des die Hülse bildenden Werkstoffes veranlaßt wird.
  6. Mehrfach-Kontaktsteckverbinder, dadurch gekennzeichnet, daß er mehrere elektrische Kontakte nach einem der Ansprüche 1 bis 5 aufweist.
  7. Verbinder nach Anspruch 6, dadurch gekennzeichnet, daß die männlichen und die entsprechenden weiblichen Kontaktteile in den Aufnahmen (4) aus isolierendem Werkstoff des männlichen (A) und des weiblichen (B) Kontaktteiles des Verbinders aufgenommen sind, wobei die Aufnahmen (4) von mindestens zwei zylindrischen koaxialen Öffnungen unterschiedlicher Durchmesser (40,41) gebildet sind, derart, daß eine Schulter mit kleiner Stufung gebildet ist.
  8. Verbinder nach Anspruch 7, dadurch gekennzeichnet, daß die genannten Blöcke (100) aus isolierendem Werkstoff der männlichen (A) und weiblichen (B) Kontaktteile durch Gießformen gebildet sind, wobei die Aufnahmen (4) durch Gießen des isolierenden Werkstoffes in eine Form enthaltend Gießkerne (10,11) entsprechend den Abmessungen der Aufnahmen (4) gebildet werden.
EP87401802A 1986-08-04 1987-08-03 Elektrischer Kontakt für Mehrfachsteckverbinder und Steckverbinder mit solchen Kontakten Expired - Lifetime EP0259205B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8611264A FR2602373B1 (fr) 1986-08-04 1986-08-04 Contact electrique pour connecteur multicontacts et connecteur comportant de tels contacts electriques
FR8611264 1986-08-04

Publications (2)

Publication Number Publication Date
EP0259205A1 EP0259205A1 (de) 1988-03-09
EP0259205B1 true EP0259205B1 (de) 1992-02-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP87401802A Expired - Lifetime EP0259205B1 (de) 1986-08-04 1987-08-03 Elektrischer Kontakt für Mehrfachsteckverbinder und Steckverbinder mit solchen Kontakten

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Country Link
US (1) US4775334A (de)
EP (1) EP0259205B1 (de)
DE (1) DE3776842D1 (de)
FR (1) FR2602373B1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5156555A (en) * 1990-08-23 1992-10-20 Leopold Kostal Gmbh & Co. Electrical connection device
FR2699263B1 (fr) * 1992-12-15 1995-01-27 Cryotechnologies Refroidisseur muni d'un doigt froid équipé d'un coupleur thermique.
CN101807757A (zh) * 2009-02-16 2010-08-18 凡甲电子(苏州)有限公司 导电端子组件和使用该端子组件的电连接器
US9444169B2 (en) * 2015-01-21 2016-09-13 Cooper Technologies Company Contacts with retractable drive pins
US12100910B2 (en) * 2021-12-06 2024-09-24 International Business Machines Corporation Shape-memory alloy lock for connectors

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB941840A (en) * 1960-01-11 1963-11-13 United Carr Fastener Corp Improvements in and relating to electrical connectors
US3079582A (en) * 1961-04-12 1963-02-26 Burndy Corp Pin and socket connectors
FR1500265A (fr) * 1966-09-16 1967-11-03 Wilhelm Harting Werk Fur Elekt Dispositif pour maintenir des éléments de contact amovibles dans des connecteurs électriques
DE1640753A1 (de) * 1968-01-03 1970-11-05 Adam Kirchbauer Steckverbindungselement
NL7315089A (de) * 1972-06-21 1974-05-10
US3801954A (en) * 1972-11-28 1974-04-02 Bunker Ramo Coupled electrical connector with heat-activated memory locking means
JPS5225289U (de) * 1975-08-14 1977-02-22
US4497527A (en) * 1982-09-30 1985-02-05 Raychem Corporation Supplementary force heat-recoverable connecting device
FR2563055A1 (fr) * 1984-04-12 1985-10-18 Souriau & Cie Procede de realisation de connecteur
FR2589287B2 (fr) * 1985-03-19 1988-10-21 Souriau & Cie Borne de contact electrique thermo-enfichable sur une carte de circuit imprime multicouche et connecteur comportant celle-ci

Also Published As

Publication number Publication date
EP0259205A1 (de) 1988-03-09
DE3776842D1 (de) 1992-04-02
FR2602373A1 (fr) 1988-02-05
FR2602373B1 (fr) 1990-06-01
US4775334A (en) 1988-10-04

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