EP0522613B1 - Electrical contact pin for printed circuit board - Google Patents

Electrical contact pin for printed circuit board Download PDF

Info

Publication number
EP0522613B1
EP0522613B1 EP92201646A EP92201646A EP0522613B1 EP 0522613 B1 EP0522613 B1 EP 0522613B1 EP 92201646 A EP92201646 A EP 92201646A EP 92201646 A EP92201646 A EP 92201646A EP 0522613 B1 EP0522613 B1 EP 0522613B1
Authority
EP
European Patent Office
Prior art keywords
contact pin
longitudinal
electrical contact
fins
longitudinal distance
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
EP92201646A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0522613A1 (en
Inventor
Paulus Johannes Maria Pigmans
Peter Wouter Hendrikus Schalk
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.)
Connector Systems Technology NV
Original Assignee
Connector Systems Technology NV
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 Connector Systems Technology NV filed Critical Connector Systems Technology NV
Publication of EP0522613A1 publication Critical patent/EP0522613A1/en
Application granted granted Critical
Publication of EP0522613B1 publication Critical patent/EP0522613B1/en
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
    • 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

Definitions

  • the invention relates to an electrical contact pin for mounting in a through hole in a printed circuit board, which contact pin has a pointed part and a longitudinal contact part which interacts with the hole when mounted therein, and the cross-section of which in general has an H-shape formed through four fins which project parallel to the longitudinal axis of the pin and are connected over the longitudinal distance of the contact part by a central cross rib and define two longitudinal recesses situated on either side of the cross rib, each longitudinal recess having an essentially V-shaped floor.
  • Such a contact pin is known from Netherlands Patent Application 8502046 (corresponds to EP-A-0 209 936).
  • Such pins, also known as press-fit pins are mounted in through holes of printed circuit boards.
  • the holes are provided with a metallization, generally consisting of copper, possibly with a thin layer of tin over it.
  • a metallization generally consisting of copper, possibly with a thin layer of tin over it.
  • pins are virtually entirely made of square wire or flat strip material, the longitudinal recesses of the contact part being formed by stamping technology, and the fins being forced or extruded outwards, upwards or downwards.
  • the object is that the four fins on insertion of the pin into the hole of the printed circuit board should be bent inwards gradually, so that a four-point fixing in the hole is obtained.
  • the H-shaped design means that the risk of the pin turning during mounting is reduced or ruled out. Consequently, as stated above, square pins of the type widely used in the printed circuit board industry can be used.
  • the projecting fins are constructed absolutely symmetrical and have the same thickness, so that when they are being inserted in the hole all four bend over uniformly and engage the metallization in the hole. For, slight differences in thickness and therefore in stiffness of the projecting fins lead to rotation or excentric positioning of the pin being obtained during insertion, and this can cause serious damage to the metallization in the hole. It can also give rise to more wear in the counter plug present on the rear side of the printed circuit board, through the fact that the rotated square pin then has sharper engaging faces with the fixed counter plug.
  • the flat floors have a V-shape on either side of the cross rib in the longitudinal recesses.
  • the longitudinal recesses with the V-shaped floors are obtained by means of corresponding knife-shaped dies.
  • this V-shaped floor acts as a centering facility, so that an absolutely symmetrical design of the fins on either side of the recess with the same thickness and height is obtained.
  • the object of the invention is to solve this problem.
  • This is achieved according to the invention with an electrical contact pin of the type mentioned in the preamble in that the contact part is made slightly curved at its short sides, each of which has two fins merging into each other over the entire longitudinal distance.
  • the fins are in this case made with their fin ends more strongly curved inwards from the pointed part over an appreciable part of the above-mentioned longitudinal distance.
  • the appreciable part comprises approximately half the above-mentioned longitudinal distance.
  • this bending runs inwards, gradually first increasing from the pointed part, and then decreasing.
  • the longitudinal recesses of the contact part with the V-shaped floors are formed on both sides of the cross rib by means of two corresponding knife-shaped dies.
  • the contact pin is now deformed over the longitudinal distance of the contact part, and in particular over the said appreciable part thereof by a press-on operation using two opposite press-on elements.
  • Fig. 1a the contact part is indicated in its entirety by 1, the pointed part by 9, the longitudinal recess at one side of the contact part by 2, the two fins on either side of the longitudinal recess 2 by 3 and 4, and the gradually increasing and decreasing transition of these fins at the insertion and opposite side of the contact pin during a phase of manufacture by 7 and 8 respectively.
  • Fig. 1b shows a longitudinal section of the contact pin of Fig. 1a, from which it can be seen clearly that the transverse or cross rib has the same thickness over a large part of the longitudinal distance of the longitudinal recess, but that the thickness increases slightly at the insertion side and at the opposite side corresponding to the transitions 7 and 8, as is also indicated in the cross-sectional views of Figs. 1c and 1d.
  • Fig. 2a shows a perspective view of an electrical contact pin according to Fig. 1a partially inserted into a printed circuit board hole. It can be seen clearly from this that there is initially only a small contact surface between the pin and the hole.
  • Fig. 2b gives a cross-sectional view of the further inserted contact pin along the line Id - Id of Fig. 1b, from which it can be seen how the fins are bent inwards slightly in a uniform and symmetrical manner and make contact with the metallization of the hole. The H-shape of the contact part is approximately retained. It will be clear that this slight bending caused by the insertion during mounting does not yet occur at the gradual transitions 7 and 8.
  • the deformation caused in the metallization in particular in the case of contact pins of small dimensions, is greater than the 0.05 mm required according to the MIL standard.
  • the contact pin according to the invention is deformed over an appreciable part of the longitudinal distance of the contact part, so that the fins are curved inwards by their ends.
  • FIG. 3a shows a longitudinal section running along the longitudinal axis.
  • Figs. 3c, 3d and 3e show cross-sectional views of the contact pin of Fig. 3a along the lines IIIc - IIIc, IIId - IIId and IIIe - IIIe of Fig. 3b respectively. It can be seen from this that the fins are bent inwards over an appreciable part of the longitudinal distance of the contact part, gradually first increasing, and then decreasing. At the same time the height of the fins increases from the beginning to a maximum value, accompanied by a decrease in the thickness of the cross rib, as can be seen from a comparison of Figs. 3b, 3c and 3d.
  • the above-mentioned appreciable part can be approximately half the longitudinal distance. A more flexible insertion of the contact pin into the printed circuit board hole is obtained through this inward-bent state of the fins, which is strongest particularly in the part between the cross-sections IIIc - IIIc and IIId - IIId.
  • the strict requirements of e.g. the MIL standard can be met by this design.
  • Fig. 4a again shows a perspective view of a contact pin according to the invention inserted partially into a printed circuit board hole. It can be seen here that, unlike the contact pin of Fig. 2a, there is initially a great contact surface between pin and metallization.
  • Fig. 4b shows a cross-sectional view of the further inserted contact pin along the line IIIe - IIIe in Fig. 3b. The enlarged contact engaging faces between the fins and the metallization of the hole can also be seen from the latter cross-sectional view.
  • the longitudinal recesses of the contact parts are again made according to the known manufacturing method by means of knife-shaped dies by which the V-shaped floors of the cross rib are obtained with an extremely reliable and symmetrical design of the fins on either side.
  • the deformation of the contact part is then carried out, as a result of which, over the longitudinal distance, the short sides with the fins of the contact part merging into each other are slightly curved, and in particular the fins are curved more strongly inwards over approximately the first part of the longitudinal distance.
  • Fig. 5 shows a perspective view of the finished and thus already deformed contact pin of Fig. 3a, with the two press-on elements or semi-circular bushes used for the deformation.
  • the two bushes 11, 12 are shown in the retracted position symmetrically below and above the pin contact part respectively.
  • the two bushes in a first embodiment which is not shown each comprise a straight half cylinder.
  • each semi-circular bush comprises a first semi-cylindrical part 13, a semi-conical part 14, and a second semi-cylindrical part 15.
  • the two bushes are positioned against each other symmetrically in such a way relative to and around the contact pin to be deformed that the opposite-lying transitions between the parts 13 and 14 lie in the transverse plane of the contact part, where the decreasing thickness of the cross rib 10 from the cross-sectional plane IIIc - IIIc in Fig. 3b becomes constant, and in such a way that the opposite-lying transitions between the parts 14 and 15 lie in the transverse plane of the contact part approximately half way along the longitudinal distance thereof.
  • the diameter of the first cylindrical part is 0.62 mm
  • the angle of the conical part is 11°
  • the diameter of the second cylindrical part is 0.85 mm.

Landscapes

  • Multi-Conductor Connections (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
EP92201646A 1991-07-12 1992-06-05 Electrical contact pin for printed circuit board Expired - Lifetime EP0522613B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9101236A NL9101236A (nl) 1991-07-12 1991-07-12 Elektrische contactpen voor printplaat.
NL9101236 1991-07-12

Publications (2)

Publication Number Publication Date
EP0522613A1 EP0522613A1 (en) 1993-01-13
EP0522613B1 true EP0522613B1 (en) 1995-09-06

Family

ID=19859516

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92201646A Expired - Lifetime EP0522613B1 (en) 1991-07-12 1992-06-05 Electrical contact pin for printed circuit board

Country Status (5)

Country Link
EP (1) EP0522613B1 (nl)
JP (1) JPH05211073A (nl)
DE (1) DE69204587T2 (nl)
HK (1) HK19196A (nl)
NL (1) NL9101236A (nl)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4218431C2 (de) * 1992-06-04 1995-04-20 Cannon Electric Gmbh Einrichtung zur Verbindung eines Steckverbinders mit einer Leiterplatte
JP2929176B2 (ja) 1996-09-20 1999-08-03 モレックス インコーポレーテッド プレスフィットピン
US6098281A (en) * 1996-11-06 2000-08-08 Weidmuller Interface Gmbh & Co. Electrical pins and method for their insertion into apertures of a circuit board
JP6427348B2 (ja) * 2014-07-16 2018-11-21 矢崎総業株式会社 コネクタ
JP6996117B2 (ja) * 2017-05-31 2022-01-17 株式会社アイシン プレスフィット端子

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8502046A (nl) * 1985-07-16 1987-02-16 Du Pont Nederland Elektrische contactpen voor printplaat.
US4701140A (en) * 1986-07-28 1987-10-20 Gte Products Corporation Electrical connector with compliant section
US4769907A (en) * 1987-07-27 1988-09-13 Northern Telecom Limited Method of making a circuit board pin
DE8816798U1 (de) * 1988-02-10 1990-09-27 Harting Elektronik Gmbh, 4992 Espelkamp Stiftförmiges Kontaktelement zur Befestigung in Leiterplattenbohrungen
US4878861A (en) * 1988-11-01 1989-11-07 Elfab Corporation Compliant electrical connector pin

Also Published As

Publication number Publication date
NL9101236A (nl) 1993-02-01
HK19196A (en) 1996-02-09
DE69204587T2 (de) 1996-04-18
DE69204587D1 (de) 1995-10-12
JPH05211073A (ja) 1993-08-20
EP0522613A1 (en) 1993-01-13

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