EP0002083B1 - Méthode pour la fabrication des douilles pour connecteurs électriques - Google Patents

Méthode pour la fabrication des douilles pour connecteurs électriques Download PDF

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Publication number
EP0002083B1
EP0002083B1 EP78200289A EP78200289A EP0002083B1 EP 0002083 B1 EP0002083 B1 EP 0002083B1 EP 78200289 A EP78200289 A EP 78200289A EP 78200289 A EP78200289 A EP 78200289A EP 0002083 B1 EP0002083 B1 EP 0002083B1
Authority
EP
European Patent Office
Prior art keywords
tines
length
socket
pin
socket member
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
EP78200289A
Other languages
German (de)
English (en)
Other versions
EP0002083A1 (fr
Inventor
Jr. Leonard Lacaze
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.)
TDK Micronas GmbH
ITT Inc
Original Assignee
Deutsche ITT Industries GmbH
ITT Industries Inc
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 Deutsche ITT Industries GmbH, ITT Industries Inc filed Critical Deutsche ITT Industries GmbH
Publication of EP0002083A1 publication Critical patent/EP0002083A1/fr
Application granted granted Critical
Publication of EP0002083B1 publication Critical patent/EP0002083B1/fr
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
    • 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 method of manufacturing socket members for electrical connectors comprising a sleeve portion on the rear side, a mid-body section serving to mount the socket member, and a forward, slotted pin-gripping portion whose tines are inclined to each other in the direction of their free ends.
  • the tubular electrical socket contact with split tines is familiar and has been widely employed.
  • the process of manufacturing the individual socket members, a plurality of which maybe included in a multi- connection electrical connector have been manufactured by processes including a step of bending or deforming the tines in a radially inward fashion. This constricts the aperture of the socket to an effective diameter less than that of the pin such that when a mating pin is inserted therein, a substantial frictional gripping force is exerted against it.
  • Typical prior art sockets are extensively described in the technical and patent literature, for example, in U.S. Patent 3,286,222 and in the drawings of U.S. Patent 3,043,925.
  • the socket members in those patents are of the crimped or bent-tine types.
  • Those conventional socket contacts exhibit several sensitive parameters that adversely effect the achievability of repeat-able, low insertion force while maintaining satisfactory contact pressure.
  • the pin-gripping force achievable, according to the aforementioned prior art manufacturing method, is highly variable; therefore. in order to insure the least minimum pin-gripping force for all connections, overdesign in that respect is the usual approach.
  • the overall insertion force can be quite large.
  • the advantages offered by the invention are mainly that in socket members, at the roots of the tines, the socket body is not subjected to any stress, such as tensile deformation on the outside and compressive deformation on the inside.
  • the socket members can advantageously be manufactured so that the gripping forces exerted by the tines on the inserted pin are not higher than absolutely necessary.
  • multicontact connectors can be manufactured whose halves can be mated with minimum effort.
  • FIG. 1 the cross-sectional view is of a typical prior art socket member before the bending of the tines is effected.
  • the generally tubular walls of the socket are axially slotted to a depth 12, producing tines 10 and 11.
  • the OD (outside diameter) of the aperture end is essentially that of the stock, the same applying to the ID (inside diameter).
  • the beam length depicted in Fig. 1 a is of significance throughout the description, this representing the equivalent cantilevered beam represented by each of the tines.
  • the tine root area around 12 is obviously the area of maximum stress as the tines are flexed in operation or when they are inwardly bent as part of the prior art manufacturing process, as illustrated in 1 b.
  • Insertion of the pin 13 of Fig. 1 c flexes the tines 10 and 11 in Fig. 1 b radially outward so that they effectively assume a "sprung-out” position gripping the pin 13 along their internal surfaces.
  • a manufacturing step involving the radially inward bending of the tines produces the configuration of 1 and involves a plastic (inelastic) deformation in the tine root region. This produces work-hardening of the copper base material in the said root region, but not at all uniformly throughout the tine roots.
  • the inside fibers of each tine are compressed, whereas the outside fibers are deformed plastically as a result of tensile overstressing.
  • overstressing it is, of course, meant that the material exceeds its yield point and takes on a "permanent set".
  • Figs. 2a and 2b are helpful in understanding the geometry of insertion forces and pin-contact friction.
  • the mating force is defined by the relationship depicted in Fig. 2a and may be expressed as:
  • the mating force may be defined as the product of R and F,.
  • Fig. 4a typical socket according to the invention will be described.
  • One practical embodiment according to Fig. 4a has the following dimensions:
  • the socket member of Fig. 4a has a sleeve portion 14 of axial length B.
  • the inside diameter of the bore 18 of this portion 14 may be greater than indicated on a relative visual scale as might the corresponding outside diameter also be larger than indicated.
  • the purpose of this portion 14 is to provide a wire installing sleeve or, alternatively, a sleeve for receiving an intermediate stub or adaptor which is itself attached to a wire.
  • the purpose, in turn, of providing such an intermediate stub is the avoidance of any crimping of the sleeve 14.
  • the entire socket member 20 according to Fig. 4a is of a material, preferably a copper alloy, having significant spring properties, good machinability, ductility and conductivity. However, such an alloy may not be ideal for crimping at sleeve 14, hence the intermediate stub alternative, the latter being tightly inserted (press-fit, for example) into the bore 18 of the sleeve portion 14.
  • a shoulder 15 which may be chamfered, facilitates mounting against a corresponding internal shoulder in a connector assembly insulating block, a typical expedient in electrical connectors.
  • a transition of mid-body section 16 having an inside diameter 17 also has an outside dimension G. Its length is equal to C minus B, and ID 17 is a mating pin clearance dimension, although the pin would not always be inserted to a depth even as great as the full length of dimension D.
  • the manufacturing process can be of one of straight-forward machining operations.
  • the stock may be advantageously drawn into a die having the conical shape which begins at the transition from the mid-body section 16 to E and F.
  • a drawing process is particularly advantageous from the point of view that the tine root region around 19 may be formed with closely held material thickness (tubular wall thickness), that being an important factor in controlling the characteristics of the time considered as a cantilevered beam as aforementioned.
  • drawing does introduce work hardening, but it is relatively uniform over the material cross-section and is predictable and controllable. Thus, the amount of work hardening introduced by drawing can be predicted and, therefore, factored into the design.
  • the next step in the process of manufacture would normally be the slotting by cutting, or other known process step, to the depth D and width J. At this step, the slot 24 of width J would continue to the aperture of the socket 20. Tines 22 and 23 are thereby formed.
  • the contact area can be shifted more or less to the circumferential inside center surfaces of the tines.
  • the illustrations in Figs. 3a and 3b are obviously exaggerated for emphasis, however, this situation is more realistically portrayed in the partial end view of Fig. 4c.
  • the tines, 22 for example, in Fig. 4a have a longer radius, no longer centered on the axial center line of the socket aperture. This is illustrated in Fig. 4c in that the radius R' of the unflattened tine 22' changes to R for the reshaped tine 22.
  • Fig. 3b would indicate that the flattening is such as to produce an effective tine radius greater than the radius of pin 13. This is a possible construction or design choice; however, the radius may be as small as substantially that of the pin 13 itself.
  • the partial flattening as it has been called, referring to the process of modifying 22' to the form of 22 for a predetermined distance inward from the socket aperture, is actually a change of curvature and not actually a flattening in the ordinary sense of that adjective and, as such, does represent plastic deformation.
  • bending or flattening action which achieves this change of curvature is accomplished by insertion of a mandrel into the socket aoerture or through the socket body from the rear to prevent the application of sufficient bending moment to the tine root region 19 to cause the plastic deformation which is particularly to be avoided.
  • tine end curvature modification plays no part in the design insofar as insertion and pin frictional forces are concerned, since the new curvature R, once achieved, is a fixed shape.
  • Fig. 4b illustrates that the outline of the socket aperture after this so-called flattening operation is an ablate circle; i.e., one in which the dimension 25 is less than the orthogonal dimension of the aperture at the same axial point (same cross-sectional plane).
  • the radii of the surfaces 26 and 26' are at least equal to that of the pin, if not greater.

Landscapes

  • Manufacturing Of Electrical Connectors (AREA)

Claims (4)

1. Méthode de fabrication d'une douille de contact (20) pour connecteur électrique, caractérisée par le fait qu'elle comporte les étapes suivantes:
a) formage de l'extrémité libre d'une longueur de matériau tubulaire pour obtenir une partie conique sur une longueur prédéterminée (E, F);
b) rainurage de la paroi du tube dans la partie conique sur une longueur (D) n'excédant pas la longueur (E, F) de la partie conique;
c) aplatissement des languettes (22, 23) séparées par les rainures (24) à partir de l'extrémité d'ouverture de la douille (20) sur une longueur (F) plus courte que celle des rainures (24) pour donner à la section transversale de chaque languette un rayon (R) plus grand que le rayon initial (R');
d) séparation de la douille terminée (20) en coupant la longueur de matériau tubulaire à une distance axiale (A), qui est maintenue dans des limites prédéterminées.
2. Méthode conforme à la revendication 1, caractérisée par le fait que la partie conique de la douille de contact (20) est formée par étirage du tube.
3. Méthode conforme à la revendication 1, caractérisée par le fait que l'aplatissement d'une longueur partielle des languettes (22, 23) s'effectue à l'aide d'un mandrin inséré dans la partie de la douille destinée au serrage d'une broche de contact associé.
4. Méthode conforme à la revendication 1, caractérisée par le fait que les côtés intérieurs des extrémités des languettes (22, 23) sont arrondis lors d'une étape supplémentaire faisant suite à la mise en forme conique.
EP78200289A 1977-11-11 1978-11-06 Méthode pour la fabrication des douilles pour connecteurs électriques Expired EP0002083B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US85062977A 1977-11-11 1977-11-11
US850629 1977-11-11

Publications (2)

Publication Number Publication Date
EP0002083A1 EP0002083A1 (fr) 1979-05-30
EP0002083B1 true EP0002083B1 (fr) 1981-08-12

Family

ID=25308693

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78200289A Expired EP0002083B1 (fr) 1977-11-11 1978-11-06 Méthode pour la fabrication des douilles pour connecteurs électriques

Country Status (8)

Country Link
EP (1) EP0002083B1 (fr)
JP (1) JPS5476994A (fr)
AU (2) AU518657B2 (fr)
BR (1) BR7807422A (fr)
CA (1) CA1113168A (fr)
DE (1) DE2860956D1 (fr)
ES (2) ES250082Y (fr)
IT (1) IT1192285B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2630592B1 (fr) * 1988-04-22 1990-07-20 Sogie Element de contact male pour connecteur electrique a faible force d'insertion
JP2017010703A (ja) * 2015-06-19 2017-01-12 矢崎総業株式会社 端子及び端子接続構造
JP6730343B2 (ja) * 2018-03-01 2020-07-29 矢崎総業株式会社 端子接続構造

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2563760A (en) * 1945-08-18 1951-08-07 Bendix Aviat Corp Electrical socket connector having fingers of tapered thickness
FR1237873A (fr) * 1959-06-24 1960-08-05 Equip S G E Pour L Automobile Douille de contact élastique perfectionnée
GB1152232A (en) * 1965-06-16 1969-05-14 Robert Frederick Oxley Improvements in or relating to Electrical Sockets
US3601763A (en) * 1969-02-28 1971-08-24 Ibm Pin-socket connection devices with torsioned pin contacts
FR2057512A5 (fr) * 1969-08-25 1971-05-21 Deutsch Co
CA965169A (en) * 1970-11-09 1975-03-25 Lawrence J. Kehl Electrical contact and conductor, and method of making
US4090772A (en) * 1977-01-24 1978-05-23 International Telephone And Telegraph Corporation Low insertion force electrical connector

Also Published As

Publication number Publication date
AU518657B2 (en) 1981-10-15
ES250082U (es) 1980-07-01
ES250082Y (es) 1981-01-01
ES477642A1 (es) 1979-10-16
IT7829574A0 (it) 1978-11-08
AU4115378A (en) 1980-05-08
AU4115278A (en) 1980-05-08
AU526336B2 (en) 1983-01-06
BR7807422A (pt) 1979-07-17
CA1113168A (fr) 1981-11-24
EP0002083A1 (fr) 1979-05-30
DE2860956D1 (en) 1981-11-12
JPS5476994A (en) 1979-06-20
IT1192285B (it) 1988-03-31

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