EP0736939A1 - Contact électrique à force d'insertion - Google Patents

Contact électrique à force d'insertion Download PDF

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Publication number
EP0736939A1
EP0736939A1 EP96400702A EP96400702A EP0736939A1 EP 0736939 A1 EP0736939 A1 EP 0736939A1 EP 96400702 A EP96400702 A EP 96400702A EP 96400702 A EP96400702 A EP 96400702A EP 0736939 A1 EP0736939 A1 EP 0736939A1
Authority
EP
European Patent Office
Prior art keywords
longitudinal axis
fixing portion
axis
axial bore
symmetrical
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.)
Withdrawn
Application number
EP96400702A
Other languages
German (de)
English (en)
French (fr)
Inventor
Bernard Logerot
Jean-Pierre Huguenet
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.)
Amphenol Socapex SA
Original Assignee
Amphenol Socapex SA
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 Amphenol Socapex SA filed Critical Amphenol Socapex SA
Publication of EP0736939A1 publication Critical patent/EP0736939A1/fr
Withdrawn legal-status Critical Current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
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50—Fixed connections
    • H01R12/51—Fixed connections for rigid printed circuits or like structures
    • H01R12/55—Fixed connections for rigid printed circuits or like structures characterised by the terminals
    • H01R12/58—Fixed connections for rigid printed circuits or like structures characterised by the terminals terminals for insertion into holes
    • H01R12/585—Terminals having a press fit or a compliant portion and a shank passing through a hole in the printed circuit board
    • 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
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49204—Contact or terminal manufacturing
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5193—Electrical connector or terminal

Definitions

  • the present invention relates to an electrical contact and, more specifically, an electrical contact with insertion force.
  • Such a contact 10 comprises a portion forming a contact terminal 12 and a fixing portion 14.
  • the fixing portion 14 is forcibly inserted into a metallized hole 16 of the printed circuit 18 in which one wishes to connect the contact 10.
  • the portion 14 is given a so-called "needle eye" shape.
  • the portion 14 has a curved lateral surface 20 and this portion 14 has a transverse hole 22 in the shape of an ellipse or the like.
  • the hole 22 thus defines two arms 24 and 26 which extend between the free end 28 of the portion 14 and its connection end 30 to the portion 12 forming a contact terminal.
  • the arms 24 and 26 having a relatively reduced thickness can be mechanically deformed during the insertion of the portion 14 into the metallized hole 16. This not only gives the electrical connection but also the mechanical connection between the electrical contact 12 and the circuit printed 18. Such a solution makes it possible in particular to avoid having to make a solder between the contact and the printed circuit.
  • One of the objects of the present invention is to provide a method for manufacturing the fixing portion of the electrical contact with insertion force which can only carry out conventional operations.
  • bar turning that is to say operations which do not require any specific tool and the implementation of which is relatively inexpensive.
  • the various machining operations which are carried out on the fixing portion of the electrical contact can be carried out by conventional bar turning tools such as an axial boring machine, a milling cutter or a milling machine and a lathe, operations which can also be carried out on a CNC machine or on a bar turning machine.
  • the manufacturing cost is therefore very low, but above all the tooling cost to obtain these shapes is very low, while making it possible to obtain the same mechanical characteristics as the insertion force contacts obtained by the current state of the technical.
  • said surface of revolution machined in step a) has a generator having the shape of a concave curve towards said longitudinal axis and the largest of which distance from said longitudinal axis is substantially located at mid-length of said fixing portion and step c) consists of machining said lateral surface of said fixing portion to define two substantially cylindrical and identical surface portions having parallel axes between them and orthogonal to said longitudinal axis, said cylindrical surface portions intersecting said axial bore, whereby said axial bore opens into said lateral surface by two openings symmetrical with respect to said longitudinal axis.
  • the invention also relates to an electrical contact of the type obtained by implementing another method which comprises a fixing portion capable of being inserted into an orifice and a portion forming a contact terminal, said fixing portion having a free end. , one end of connection to the terminal portion, a longitudinal axis extending between said ends, and a lateral surface, characterized in that said fixing portion comprises a blind axial bore opening into said free end and extending according to at least part of said longitudinal axis and in that said lateral surface is defined by a surface of revolution around said longitudinal axis and by two portions of substantially identical cylindrical surfaces having axes which are parallel to each other, symmetrical with respect to said longitudinal axis and orthogonal to the latter, each portion of cylindrical surface intersecting said bore axial whereby said axial bore opens into said lateral surface by two orifices symmetrical with respect to said longitudinal axis.
  • the insertion portion 34 is given an external lateral surface of suitable shape. More precisely, this surface which is obtained by conventional turning techniques, such as a lathe is constituted for example by going from the free end 36 of the portion 34 to its connection end 38 to the portion 32 forming a connection terminal by a conical end 40; a substantially cylindrical portion 42 and a "barrel" shaped portion 44.
  • the side wall portion 44 is a surface S1 of revolution about the longitudinal axis X, X 'of the portion 34.
  • the generating the cylindrical surface S1 is a portion of a circle of radius R1.
  • the point of the generator of this surface A which is at the greatest distance from the axis of revolution X, X ′ is substantially disposed at mid-length of the fixing portion.
  • the generatrix is a concave curve seen from the axis X, X 'in such a way that the fixing portion has an increased width substantially in its middle part.
  • a blind axial bore 46 is produced which opens into the end 36 of the fixing portion 34.
  • the axial bore has a diameter D2 and a depth 1 which allows, after the third step, the appearance of the orifices 50 and 52.
  • the surface of revolution S1 defining the side wall of the fixing portion 34 is partially modified by milling two portions of cylindrical surface S2 and S3. These surfaces have the same radius R2.
  • the axes Y, Y 'and Z, Z' of these two cylindrical surfaces are separated by such a value that the surfaces S2 and S3 intersect the axial bore 46.
  • two symmetrical orifices 50 and 52 make the axial bore 46 communicate with the outside, opening into the cylindrical surface portions S2 and S3 respectively.
  • a structure is thus obtained which defines two arms 52 and 54 of reduced section which are separated by the axial bore 46 and by the orifices 50 and 52 and connected at a first end corresponding to the connection end 38 and to their second end corresponding to the free end 36.
  • the fixing portion constituted by the two arms has in a first direction perpendicular to the longitudinal axis a reduced thickness (between the two portions of cylindrical surface) and according to a second direction perpendicular to the first a width greater than that of the free end of the fixing portion.
  • FIG 6 there is shown a complete electrical contact obtained by the implementation of the method described above. More specifically, in this figure there is shown the fixing part 30 which is identical to that which is shown in Figure 5 and the part forming an electrical contact terminal 32. In the particular example described part 32, constitutes a male terminal . It goes without saying that by the same technique, a female type contact could be made.
  • the external face 60 of the part 62 of the part intended to constitute the fixing portion is machined by bar turning, to give it the shape of a cylindrical surface of revolution of axis XX ′, and a blind axial bore 64 is produced, identical to that of FIG. 3.
  • a tube 66 is thus obtained, the wall of which has a relatively reduced constant thickness.
  • a hole is made which crosses the entire tube 66, this hole having an axis YY 'orthongal to the axis XX' and arranged in the middle part of the portion 62.
  • This hole has an axis YY 'orthongal to the axis XX' and arranged in the middle part of the portion 62.
  • the middle part of the tube 66 having the holes 68 and 70 is crushed between two tools in the form of cylindrical surface portions applied in the directions F and F ', that is to say say in directions substantially coincident with the axis YY 'of the holes 68 and 70.
  • two portions of cylindrical surfaces S' 1 and S ' 2 whose axes are perpendicular to the longitudinal axis XX' and on the other hand, a "widening" of the tube in zones 72 and 74. This gives good deformability of the two arms when the electrical contact is inserted into the metallized hole of the printed circuit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
EP96400702A 1995-04-04 1996-04-01 Contact électrique à force d'insertion Withdrawn EP0736939A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9503940 1995-04-04
FR9503940A FR2732821B1 (fr) 1995-04-04 1995-04-04 Contact electrique a force d'insertion

Publications (1)

Publication Number Publication Date
EP0736939A1 true EP0736939A1 (fr) 1996-10-09

Family

ID=9477716

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96400702A Withdrawn EP0736939A1 (fr) 1995-04-04 1996-04-01 Contact électrique à force d'insertion

Country Status (4)

Country Link
US (1) US5915759A (cs)
EP (1) EP0736939A1 (cs)
CZ (1) CZ99996A3 (cs)
FR (1) FR2732821B1 (cs)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3676608B2 (ja) * 1999-02-19 2005-07-27 矢崎総業株式会社 基板用端子の製造方法
US6538424B1 (en) * 2000-07-31 2003-03-25 Le Croy Corporation Notched electrical test probe tip
WO2018187120A1 (en) 2017-04-03 2018-10-11 Interplex Industries, Inc. Press-fit contact pin
US11431141B1 (en) 2019-08-06 2022-08-30 Interplex Industries, Inc. Method of manufacturing a press-fit contact

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2321228A1 (fr) * 1975-08-14 1977-03-11 Rhein Westfael Isolatoren Element electrique tel qu'une resistance, un condensateur et analogues pour le montage de plaquettes a circuits imprimes
WO1986004743A1 (en) * 1985-02-05 1986-08-14 North American Specialties Corporation Compliant connector
EP0236186A1 (en) * 1986-01-31 1987-09-09 Digital Equipment Corporation Press-fit pin for circuit board connection
EP0373428A2 (en) * 1988-12-14 1990-06-20 International Business Machines Corporation Pin with tubular elliptical compliant portion and method for affixing to mating receptacle
DE9012094U1 (de) * 1990-08-22 1990-10-25 Winchester Electronics Zweigwerk der Litton Precision Products International GmbH, 7100 Heilbronn Preßfit-Kontakt

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1088235A (en) * 1965-05-14 1967-10-25 Oxley Dev Co Ltd Improvements in and relating to electric plugs
US5230642A (en) * 1990-08-22 1993-07-27 Molex Incorporated Press-fit contact
US5255580A (en) * 1992-10-15 1993-10-26 Positronic Industries, Inc. Method and apparatus for turning a concave cut in a workpiece
GB9415765D0 (en) * 1994-08-04 1994-09-28 Smiths Industries Plc Electrical contacts

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2321228A1 (fr) * 1975-08-14 1977-03-11 Rhein Westfael Isolatoren Element electrique tel qu'une resistance, un condensateur et analogues pour le montage de plaquettes a circuits imprimes
WO1986004743A1 (en) * 1985-02-05 1986-08-14 North American Specialties Corporation Compliant connector
EP0236186A1 (en) * 1986-01-31 1987-09-09 Digital Equipment Corporation Press-fit pin for circuit board connection
EP0373428A2 (en) * 1988-12-14 1990-06-20 International Business Machines Corporation Pin with tubular elliptical compliant portion and method for affixing to mating receptacle
DE9012094U1 (de) * 1990-08-22 1990-10-25 Winchester Electronics Zweigwerk der Litton Precision Products International GmbH, 7100 Heilbronn Preßfit-Kontakt

Also Published As

Publication number Publication date
US5915759A (en) 1999-06-29
CZ99996A3 (en) 1996-10-16
FR2732821B1 (fr) 1997-07-04
FR2732821A1 (fr) 1996-10-11

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