EP0069212B1 - Dispositifs pour connecter des circuits électriques - Google Patents

Dispositifs pour connecter des circuits électriques Download PDF

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Publication number
EP0069212B1
EP0069212B1 EP19820103885 EP82103885A EP0069212B1 EP 0069212 B1 EP0069212 B1 EP 0069212B1 EP 19820103885 EP19820103885 EP 19820103885 EP 82103885 A EP82103885 A EP 82103885A EP 0069212 B1 EP0069212 B1 EP 0069212B1
Authority
EP
European Patent Office
Prior art keywords
prong
conductors
electric circuit
curve
stand
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
EP19820103885
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German (de)
English (en)
Other versions
EP0069212A1 (fr
Inventor
Robert Hammer
Ralph Leroy Hollis, Jr.
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of EP0069212A1 publication Critical patent/EP0069212A1/fr
Application granted granted Critical
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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
    • H01R13/33—Contact members made of resilient wire

Definitions

  • the invention relates to devices for interconnecting two parts of an electric circuit, and is particularly, but not exclusively concerned with such devices that are ganged for interconnecting a multiple of electric circuits.
  • the two patents to Greil and Audiger disclose electric circuit connecting devices comprising two parts similar in some respects to the parts of the invention.
  • a bundle of elongated conductors is arranged in a well, and a relatively large diameter convex conductive prong is inserted into the bundle of conductors for completing the contact between two parts of an electric circuit.
  • the convex prongs require considerable pressure to insert into a bundle of conductors, and there is no suggestion of a concave prong as contemplated by the instant invention.
  • the patent to Waldo is directed to a strain relief but also shows a conductive conical prong and stranded wire connecting arrangement such that some displacement can be tolerated.
  • the patent to Wyatt and Wright discloses an arrangement similar to that of Waldo. These arrangements do not use a concave prong as contemplated according to the invention.
  • Oskima and McKeown et al patents each show mating electric conductors having wiping contact areas of considerable length.
  • Oskima is concerned with rather inflexible contactors, and McKeown et al join a number of fine flexible beryllium copper wires (as in a pair of stranded wires) by directly interlaying.
  • the concept of a concave tapered conductor inserted into a bundle of elastic wires is absent.
  • the Bergner (French) patent is not particularly pertinent other than for the use of one tapered sleeve placed over one conductor of a group for expanding the bundle in a surrounding cylindrical sleeve.
  • the connector shown in the French patent to the AMP Co discloses little more than the use of a conical wedge, which may even be an insulator, for expanding the ends of a stranded wire against the inside wall of a conical conductive tube to obtain a permanent connection.
  • a temporary, reusable connection is contemplated.
  • no showing of a concave pronglike wedge is seen.
  • an electric circuit connecting device comprising a stand of elongated electric conductors each having one end connected in common to one part of said electric circuit and extending substantially parallel to one another, and an electrically conductive prong having one end thereof electrically connected to another part of said electric circuit to be connected and having the other end thereof of reduced diameter for inserting said prong into said stand of conductor for completing said electric circuit, characterised by said prong having a configuration comprising a surface of revolution about the longitudinal axis defined by said ends of said prong, said surface of revolution being defined by a curve concave with respect to said axis, progressing from substantially zero at said other end to the maximum dimension at said one end and conforming to the longitudinal shape assumed by a said conductor when deformed as a uniformly load cantilever beam anchored substantially at the undisplaced end.
  • the prong has a peripheral contour in the form of a surface of revolution about the longitudinal axis lying on the curve where
  • FIG. 1 A side-view in cross-section of cooperating complementary and dissimilar counterpart electric circuit connecting members according to the invention is shown in Figure 1.
  • the members comprise a substantially rigid conductive prong 10 and a multiple of substantially flexible conductors 12 into a stand of which the prong 10 is inserted. Two or more of the conductors 12 will wipe along the surface of the prong 10 as shown.
  • the conductors 12 are imbedded in a pad 14 to which an electric circuit conductor, usually in the form of a printed circuit wiring trace 16, is attached.
  • a stand of conductors 12 is held in place by an insulating member 18 and protected by an insulating member 19, the latter members forming no part of the invention in and of themselves.
  • the conductive prong 10 is fitted with a head 20 to which a conductor 22, also usually in the form of a printed circuit wiring trace, is fitted, and the prong is mechanically and electrically connected to the above printed wiring structure 24.
  • Figure 2 shows a stand of conductors 12 prior to the insertion of a prong.
  • the conductors 12 are spaced apart at a center-to-center distance of the order of twice the diameter of the conductors.
  • a plan view of an array of multiple stands of conductors is shown in Figure 3.
  • the connection according to the invention is especially advantageous in large arrays.
  • the simplicity of the connector makes small dimensions possible, allowing a large number of connections per unit area.
  • a stand 30 is a cross-section top view of the stand shown in elevation in Figure 2.
  • a similar stand 32 is shown with a prong 10 inserted corresponding to the cross-section along the line 3-3 as shown in cross-section in Figure 1.
  • a slightly different situation is shown wherein a stand 34 has inserted therein a prong 10, which is considerably off-center due to misalignment for one reason or another.
  • the connector is highly tolerant to dimensional variations.
  • the insulating member 19 acts as a stop for the insertion of the prong 10, and also protects the conductors 12 from damage. It is also contemplated for some applications, that a plug having a multiple of prongs 10 be fitted with a telescoping sleeve to protect the prongs when the plug is not in a socket. A pair of pins, or like indexing means, longer than the prongs are arranged in the plug for inserting into bores 36 and 38 for guiding the plug into the socket. This feature is not otherwise illustrated as it is believed to be well known in the art.
  • the conductors 12 in each stand are made of phosphor bronze or a beryllium copper alloy or like material.
  • the material should have a high Young's modulus and high yield strength to provide the required spring action without permanent deformation.
  • the conductor is preferably plated with gold or palladium or other suitable material for good contact properties.
  • the conductors 12 are preferably fabricated with 0.00635-0.00762 cm. (0.0025 to 0.0030 inch) diameter Neyoro-G wire having a composition of 71.5% gold, 14.5% copper, 8.5% platinum, 4.5% silver and 1.0% zinc.
  • the conductors may be joined by welding, brazing or soldering one end of each to a pad 14 on a mother board. Mechanical crimping within a cylindrical tube or a one-piece forming operation is also contemplated.
  • the length of the conductors 12 is 0.15 to 0.20 cm. (or 0.060 to 0.080 inch). These dimensions allow an array of connects to be spaced on a 0.12 cm. (or 0.050 inch) square grid as shown in Figure 3.
  • the conductive prong 10 is mechanically formed to the required shape to produce a low force, low contact angle "parting" action upon insertion.
  • the shape of the prong 10 derives from the elastic line equation for the uniformly loaded cantilever beam hereinbefore given by equation (1).
  • the coordinates for the curve defined by equation (1) are based on an origin at the point of the prong 10 for X o and substantially at the fixed end of the conductors 12 for Yo as shown in Figure 4.
  • the X-Y coordinates are oriented for agreement with the more conventional orientation for depicting the bending of cantilever beams.
  • a mating prong of this shape will cause the conductor in the stand to be uniformly loaded as shown in Figure 4, which is a graphical representation of a plot of prong radius against the distance from the point for an arbitrary fixed set of parameters.
  • the preferred shape is shown in Figure 4(c).
  • the shape is that of a surface of revolution formed by revolving the quartic curve of Equation (1) about the x axis, which is also the longitudinal axis of the prong 10.
  • the curvature is such as to provide a large contact area and a long wiping length. As the connector becomes fully engaged, a larger number of conductors contact the prong and each other providing additional electric pathways tending toward a reliable low resistance connection.
  • the advantages of the quartic prong 10 over the conical 50 or ogive 40 configurations is that it allows the maximum insertion depth to be realized and therefore minimizing connector inductance.
  • Conductors in the stands are uniformly stressed for a longer connect-disconnect cycle life. The stress per unit length along the conductors is low, thereby minimizing the thickness of precious metal plating used. The wiped length of the conductors remains stressed and in contact with the prong, providing a high tolerance to contamination.
  • Figure 4 graphically illustrates the mating action for these three types of prongs.
  • the ogive 40 there is a concentrated stress and wire splaying which interferes with adjacent conductors in the stand.
  • the conductors remain in contact with the prong but there are no contact forces above the rather small curved contact region.
  • the quartic prong 10 according to the invention, there is a uniform stress along the entire length of the conductors.
  • a graphical representation of the insertion force required for inserting a prong according to the invention into a stand of conductors and a comparison with prongs of other configuration is made in Figure 6.
  • a curve 60 depicts the force required with a prong of ogive shape 40 as indicated.
  • Another curve 62 depicts the force required by a substantially conical prong 50, while a further curve 64 represents the force required with a concave prong 10 according to the invention.
  • the latter curve indicates a lower insertion force which is a distinct advantage is using the concave prong 10 in multiple circuit plugs and sockets.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Claims (2)

1. Un dispositif connecteur de circuit électrique comprenant un faisceau de conducteurs électriques allongés (12) ayant chacun une extrémité connectée en commun à une pièce (16) dudit circuit électrique et qui s'étendent dans une direction sensiblement parallèle les uns aux autres, et une pointe électriquement conductrice (10) dont une extrémité est connectée électriquement à une autre pièce (22) dudit circuit électrique à connecter et dont l'autre extrémité est de diamètre réduit pour introduire ladite pointe (10) dans leditfaisceau de conducteurs (12) pour compléter le circuit électrique, caractérisé par le fait que ladite pointe (10) a une configuration comprenant une surface de révolution autour de l'axe longitudinal délimité par lesdites extrémités de ladite pointe, ladite surface de révolution étant délimitée par une courbe concave par rapport audit axe, progressant de sensiblement zéro à ladite autre extrémité jusqu'à la dimension maximale à l'extrémité première nommée et prenant la forme longitudinale prise par l'un desdits conducteurs lorsqu'il est déformé à la façon d'une poutre en porte-à-faux sous charge uniforme, ancré essentiellement à l'extrémité non déplacée.
2. Un dispositif connecteur pour circuit électrique conforme à la revendication 1, caractérisé en outre par le fait que ladite pointe a un contour périphérique se présentant sous la forme d'une surface de révolution autour de l'axe longitudinal définit par la courbe:
Figure imgb0006
où
X est la dimension le long dudit axe
Y est la distance de cet axe à une point de ladite courbe
W est la force constante par unité de longueur le long de ladite pointe
E est le Module de Yound desdits conducteurs
1 est le moment d'inertie de la section desdits conducteurs et
L est la longueur desdits conducteurs.
EP19820103885 1981-06-30 1982-05-05 Dispositifs pour connecter des circuits électriques Expired EP0069212B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US27893181A 1981-06-30 1981-06-30
US278931 1981-06-30

Publications (2)

Publication Number Publication Date
EP0069212A1 EP0069212A1 (fr) 1983-01-12
EP0069212B1 true EP0069212B1 (fr) 1985-09-04

Family

ID=23066997

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820103885 Expired EP0069212B1 (fr) 1981-06-30 1982-05-05 Dispositifs pour connecter des circuits électriques

Country Status (3)

Country Link
EP (1) EP0069212B1 (fr)
JP (1) JPS587779A (fr)
DE (1) DE3265993D1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2583254A1 (fr) * 1985-06-10 1986-12-12 Thevenin Gilles Panneau de montage d'elements amovibles, en particulier pour jouets pedagogiques
US5236048A (en) * 1991-12-10 1993-08-17 Halliburton Company Apparatus and method for communicating electrical signals in a well, including electrical coupling for electric circuits therein
US5446888A (en) 1994-01-14 1995-08-29 Pyne; Charles F. Remote file transfer method and apparatus
DE102009032103A1 (de) * 2009-07-08 2011-01-13 Jungheinrich Aktiengesellschaft Leistungsteil für einen Motor eines Flurförderzeugs
JP5846409B2 (ja) * 2011-05-26 2016-01-20 日産自動車株式会社 固体高分子形燃料電池用の導電性構造体及び固体高分子形燃料電池

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR361525A (fr) * 1905-05-29 1906-07-30 Alexandre Gourju Montage des fils conducteurs de courants électriques
GB214525A (en) * 1923-09-13 1924-04-24 Ella Martin Improvements in terminals for electric cables
US2969520A (en) * 1957-09-19 1961-01-24 Aerojet General Co Strain relief for cable connectors
GB1007718A (en) * 1961-11-03 1965-10-22 Clifford Kingsbury Fitch Improvements in or relating to plugs for plug and socket connections
CA1113562A (fr) * 1978-07-28 1981-12-01 Leroy W. Fairbairn Raccord entre contacts de type balai et de type broche

Also Published As

Publication number Publication date
JPS587779A (ja) 1983-01-17
DE3265993D1 (en) 1985-10-10
EP0069212A1 (fr) 1983-01-12
JPS6249705B2 (fr) 1987-10-21

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