EP0340574A2 - Contact électrique à insertion en force et procédé pour sa réalisation - Google Patents

Contact électrique à insertion en force et procédé pour sa réalisation Download PDF

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Publication number
EP0340574A2
EP0340574A2 EP89107293A EP89107293A EP0340574A2 EP 0340574 A2 EP0340574 A2 EP 0340574A2 EP 89107293 A EP89107293 A EP 89107293A EP 89107293 A EP89107293 A EP 89107293A EP 0340574 A2 EP0340574 A2 EP 0340574A2
Authority
EP
European Patent Office
Prior art keywords
press
section
contact piece
legs
die
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Withdrawn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
EP89107293A
Other languages
German (de)
English (en)
Other versions
EP0340574A3 (fr
Inventor
Rudolf Wehrle
Arno Dingemans
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.)
CDM Connectors Development and Manufacture AG
Original Assignee
CDM Connectors Development and Manufacture AG
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 CDM Connectors Development and Manufacture AG filed Critical CDM Connectors Development and Manufacture AG
Publication of EP0340574A2 publication Critical patent/EP0340574A2/fr
Publication of EP0340574A3 publication Critical patent/EP0340574A3/fr
Withdrawn legal-status Critical Current

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    • 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
    • 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 an electrical contact piece for pressing into a bore in an electrical printed circuit board, with a press-in part which is resilient transversely to the press-in direction and which has an essentially U-shaped cross section with two elastically flexible U-legs and a U-web connecting them to one another.
  • the invention further relates to a method for producing the contact piece and a pressing tool for carrying out the method.
  • electrical contact pieces are known, which are each pressed into a hole in the circuit board and can thus be mechanically attached to the circuit board. It is also known to provide the peripheral walls of the bores of the printed circuit board receiving the contact pieces with an electrically conductive coating, in particular made of copper with a tin plating, which coating is connected to at least one of the conductor tracks, so that when each contact piece is pressed in automatically A perfect electrical connection between the contact piece and at least one assigned conductor track is created and soldering is unnecessary.
  • contact pieces for the press-in technique described. These generally have the shape of a pin, which has a widened press-in section with properties that are resilient in the direction transverse to the longitudinal axis of the pin, so that a good fit of the pressed-in contact piece is ensured even if the inside diameter of the holes in the printed circuit board is within defined tolerances varies.
  • the widened press-in section of the contact pieces has hitherto usually been formed by local splitting into two legs running approximately parallel, spread apart from one another or laterally offset with respect to one another, a stamping or cutting technique being used which generally led to sharp longitudinal edges of the press-in section.
  • Such sharp longitudinal edges have the disadvantage that when the contact piece is pressed in, they may cut out fine chips from the metallic coating on the peripheral wall of the hole in the printed circuit board, which chips may stick somewhere on the printed circuit board and can form disruptive contact bridges between conductor tracks.
  • the outer longitudinal edges of the press-in section which come into contact with the peripheral wall of the circuit board bore, have already been rounded, an additional work step being necessary in the manufacturing process.
  • the present invention is primarily based on the object of designing a contact piece of the type mentioned in such a way that its press-fit part in a circuit board bore with a width within the usual tolerance limits is sure to find a good, tilt-proof hold and when pressed into the bore certainly does not give rise to any metal forming deformation adhering to the peripheral wall of the bore.
  • Another object of the present invention is to provide an expedient and relatively simple method for producing the contact piece according to the invention.
  • the method according to the invention which achieves this object is defined in patent claim 6, while advantageous developments of the method result from the dependent claims 7 and 8.
  • the electrical contact piece 20 illustrated in FIGS. 1 to 3 has two pin-shaped end sections 21, 22 and an intermediate press-in section which is formed in cross section 23 on. From Fig. 2 it can be seen that the end portions 21 and 22 have a rectangular, approximately square cross-section.
  • the press-in section 23 is broadened in cross section, as can be clearly seen from FIG. 3 in comparison to FIG. 2.
  • the cross-sectional profile of the press-in section 23 is essentially U-shaped. It has two U-legs 24 and a U-web 25 connecting them to one another. The thickness of the U-web 25 significantly exceeds the thickness of each U-leg 24.
  • the outer surface 26 of the U-web 25 facing away from the U-legs 24 there is a rib 27 running in the longitudinal direction of the press-in section 23.
  • the outer end parts 27 of the two U-legs 24 facing away from one another are rounded in cross section.
  • the rib 27 also has an end portion 29 which is rounded in cross section.
  • the inner surface 30 of the U-web 25 facing the U-legs 24 runs approximately through the center of an imaginary circle 31 which surrounds the cross section of the press-in section 23 and affects the rounded end parts 28 and 29 of the two U-legs 24 and the rib 27, 3 shows.
  • the entire cross-sectional shape of the press-in section 23 is symmetrical with respect to a plane 32 which runs between the two U-legs 24 and through the rib 27.
  • the diameter of the bore 36 may be within a tolerance of plus or minus about 10% of the nominal diameter vary, but must in any case be smaller than the diameter of the imaginary circle 31 (Fig. 3). If the diameter of the bore 36 is at the upper tolerance limit, the two U-legs 24 are only relatively little elastically bent against each other when the press-in section 23 is inserted into the bore, as shown in FIG. 4.
  • the two U-legs 24 experience stronger elastic bends relative to one another, as shown in FIG. 5.
  • the surface portions 28 of the U-legs 24 which are rounded in cross section and the end surfaces 29 of the rib 27 which are likewise rounded in cross section come into contact with the inner wall of the bore 36. Since the contact surfaces 28 and 29 have no sharp edges, they are machined Damage to metal plating on the inner wall of the bore 36 practically impossible.
  • the inserted contact piece 20 has a firm, tilt-proof seat in the bore 36, because the three surface portions 28, 29 lying against the inner wall of the bore 36 are distributed along the circumference of the bore.
  • the pin-shaped end parts 21 and 22 of the contact piece 20 serve, for example, as plug pins for connecting plug connectors or as posts for connecting lead wires by soldering or by means of so-called wirewrap technology.
  • the end parts of the contact piece can be designed as a contact knife or contact springs.
  • the contact piece 20 described is preferably produced according to that illustrated in FIGS. 6 to 9 procedures described below.
  • the shaping of the press-in section 23 takes place by means of non-cutting extrusion with the aid of a press tool, as is shown schematically in FIG. 6.
  • This pressing tool has a stationary stand 41, a pressure bar 42 that can be moved up and down, and a pressing mold 43, 44, 45 consisting of three parts.
  • the latter consists of a two-part die 43, 44 and a movable punch 45.
  • One die part 43 is fastened to the stand 41, while the other die part 44 can be moved up and down with the pressure bar 42.
  • the 6 is arranged to be movable in the pressure bar 42 against the influence of springs 48, which springs 46 allow the upper die part 44 to retreat with respect to the pressure bar 42.
  • the two die parts 43 and 44 together delimit an elongated cavity 47, the shape of which corresponds to the outer shape of the press-in section 23 of the contact piece 20 to be produced.
  • the lower die part 43 has an elongated groove 48 for forming the rib 27 of the press-in section 23.
  • the punch 45 is also guided in a guide recess 49 in the upper die part 44 so that it can be moved up and down so that it can be moved transversely to the longitudinal direction of the cavity 47 in the direction toward the groove 48 and out of the cavity 47.
  • the cavity 47 and the punch 45 are symmetrical with respect to a common plane of symmetry 50.
  • the press-in contact piece 20 is produced, for example, as follows:
  • a pin-shaped, prismatic metal piece 51 made of a copper alloy is inserted into the opened mold 43, 44, 45, after which the upper die part 44 is pressed against the fixed lower die part 43 by lowering the pressure bar 42 and thus the die 43, 44 is closed, as shown in FIG. 7. Subsequently, the punch 45 is moved downward and pressed into the metal piece 51, as illustrated in FIG. 8. The metal piece 51 is deformed by extrusion, whereby the two U-legs 24 and the rib 27 are formed. At the end of this pressing process, the space between the three parts 43, 44 and 45 of the press mold is completely filled with material of the metal piece 51, as can be seen from FIG. 9. Finally, the punch 45 and the pressure bar 42 with the upper die part 44 are moved up to their starting positions in order to open the mold and to enable the finished contact piece 20 to be removed.
  • the contact piece 20 can also be produced from a metal piece with a rectangular or round cross section by extrusion.
  • the end sections 21 and 22 can be formed at the same time as required, be it as a winding post for the wirewrap technique or as a plug or other connecting link.
  • the second exemplary embodiment of a press-in contact piece 60 according to the invention shown in FIGS. 10 to 12 differs from that according to FIGS. 1 to 3 only by one somewhat modified cross-sectional shape and due to smaller dimensions. While the first embodiment of the contact piece is intended for insertion into a circuit board bore with a diameter of, for example, 1.0 ⁇ 0.1 mm, the second embodiment is suitable for insertion into a bore with a diameter of, for example, 0.6 ⁇ 0.05 mm .
  • the structural details of the contact piece 60 are completely analogous to those of the first exemplary embodiment 20 and are therefore designated in FIGS. 10 to 12 with the same reference numerals as in FIGS. 1 to 3. It is therefore unnecessary to go into this in more detail.
  • the contact piece 60 is also expediently produced in the same manner and with a similar pressing tool as was described with reference to FIGS. 6 to 9.
  • the two U-legs 24 are bent elastically and resiliently in order to give the contact piece 60 the necessary mechanical hold on the printed circuit board.
  • the U-legs 24 assume the positions illustrated in FIG. 13. However, if the diameter of the bore 36 is at the lower tolerance limit, the U-legs 24 are bent more strongly against one another, for example as shown in FIG. 14.
  • the according to the lower die part 43 has on its surface facing the upper die part 44 two depressions 61 which each run in the longitudinal direction of the cavity 47 and communicate with the latter.
  • these depressions 61 form, together with the upper die part 44, two groove-like recesses, which make it possible for part of the material of the press-in section 23 to laterally escape into the recesses formed by the depressions 61 in an end phase of the extrusion process after the remaining cavity 47 of the die has been completely filled with material.
  • two additional ribs 62 are produced on the press-in section 23 of the contact piece to be produced, which ribs run in the press-in direction of the contact piece and point away from the plane of symmetry 32 and are each located approximately at the transition between the U-web 25 and one of the U- Leg 24 are.
  • the resulting hardness of the extruded material of the finished contact piece can be influenced and largely adapted to practical requirements by suitable selection of the width of the recesses formed by the depressions 61, measured in the direction of movement of the stamp 45.
  • the depressions 61 may be present in the upper die part 44 or in both die parts 43 and 44 instead of in the lower die part 43.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Multi-Conductor Connections (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
EP19890107293 1988-05-06 1989-04-22 Contact électrique à insertion en force et procédé pour sa réalisation Withdrawn EP0340574A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1731/88A CH675929A5 (fr) 1988-05-06 1988-05-06
CH1731/88 1988-05-06

Publications (2)

Publication Number Publication Date
EP0340574A2 true EP0340574A2 (fr) 1989-11-08
EP0340574A3 EP0340574A3 (fr) 1990-09-12

Family

ID=4217276

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890107293 Withdrawn EP0340574A3 (fr) 1988-05-06 1989-04-22 Contact électrique à insertion en force et procédé pour sa réalisation

Country Status (3)

Country Link
US (1) US4936797A (fr)
EP (1) EP0340574A3 (fr)
CH (1) CH675929A5 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0492017A1 (fr) * 1990-12-31 1992-07-01 Zierick Manufacturing Corporation Connecteur terminal à broche frangible pour le montage et méthode de sa fabrication
WO1996024175A1 (fr) * 1995-01-31 1996-08-08 The Whitaker Corporation Broches de connexion s'emmanchant a force et dispositif electronique les utilisant
US5915999A (en) * 1995-01-31 1999-06-29 Takenaka; Noriaki Press-fit connecting pin and electronic device using the same

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9016257U1 (de) * 1990-11-29 1991-04-04 Thomas & Betts Corp., Bridgewater, N.J. Anschlußstift
US5487684A (en) * 1992-07-01 1996-01-30 Berg Technology, Inc. Electrical contact pin for printed circuit board
JP3286474B2 (ja) * 1994-09-29 2002-05-27 三洋電機株式会社 電池を内蔵する電気機器
US6179631B1 (en) * 1997-11-21 2001-01-30 Emc Corporation Electrical contact for a printed circuit board
JP3166706B2 (ja) * 1998-04-14 2001-05-14 日本電気株式会社 プレイスインコンタクト
JP3390721B2 (ja) * 2000-03-09 2003-03-31 第一電子工業株式会社 Ｃ形コンプライアントコンタクト
US6354849B1 (en) * 2000-10-10 2002-03-12 Hon Hai Precision Ind. Co., Ltd. Board-engaging structure for contacts of an electrical connector
US7270573B2 (en) * 2002-08-30 2007-09-18 Fci Americas Technology, Inc. Electrical connector with load bearing features
US7008250B2 (en) 2002-08-30 2006-03-07 Fci Americas Technology, Inc. Connector receptacle having a short beam and long wipe dual beam contact
US7018246B2 (en) * 2003-03-14 2006-03-28 Fci Americas Technology, Inc. Maintenance of uniform impedance profiles between adjacent contacts in high speed grid array connectors
US20050211612A1 (en) * 2004-03-25 2005-09-29 Mattson Roy W Jr Water suction purification device
JP2006054116A (ja) * 2004-08-12 2006-02-23 Tyco Electronics Amp Kk コンプライアントピンおよびコンプライアントピンを使用した電気コネクタ
USD551623S1 (en) * 2005-01-21 2007-09-25 Tyco Electronics Amp Korea Ltd. Action pin
US7377823B2 (en) * 2005-05-23 2008-05-27 J.S.T. Corporation Press-fit pin
US7819708B2 (en) * 2005-11-21 2010-10-26 Fci Americas Technology, Inc. Receptacle contact for improved mating characteristics
CN102684037B (zh) * 2012-05-30 2014-04-09 苏州旭创精密模具有限公司 一种ds电源公端子连读模
US9118134B2 (en) * 2013-03-01 2015-08-25 Panduit Corp. RJ-45-compatible communication connector with contacts having wider distal ends
JP6550890B2 (ja) * 2015-04-22 2019-07-31 住友電装株式会社 プレスフィット端子
CN207925708U (zh) * 2018-03-08 2018-09-28 富士康(昆山)电脑接插件有限公司 电连接器端子

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Publication number Priority date Publication date Assignee Title
US3783433A (en) * 1971-01-18 1974-01-01 Litton Systems Inc Solderless electrical connection system
GB1470007A (en) * 1973-08-01 1977-04-14 Amp Inc Electrical contact pin
US4186982A (en) * 1973-08-01 1980-02-05 Amp Incorporated Contact with split portion for engagement with substrate
JPS5163460A (en) * 1974-10-10 1976-06-01 Du Pont Kairobanpin oyobi hoho
DE3241061C2 (de) * 1982-11-06 1986-04-10 Erni Elektroapparate Gmbh, 7321 Adelberg Elastischer Einpreßstift für die lötfreie Verbindung der Wickelpfosten elektrischer Steckverbinder o.dgl. mit durchkontaktierten Leiterplatten sowie Verfahren zu seiner Herstellung
US4691979A (en) * 1983-08-04 1987-09-08 Manda R & D Compliant press-fit electrical contact
US4836806A (en) * 1983-10-24 1989-06-06 Microdot Inc. Pin connector
NL8502046A (nl) * 1985-07-16 1987-02-16 Du Pont Nederland Elektrische contactpen voor printplaat.
JPH0431740Y2 (fr) * 1986-09-26 1992-07-30

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0492017A1 (fr) * 1990-12-31 1992-07-01 Zierick Manufacturing Corporation Connecteur terminal à broche frangible pour le montage et méthode de sa fabrication
WO1996024175A1 (fr) * 1995-01-31 1996-08-08 The Whitaker Corporation Broches de connexion s'emmanchant a force et dispositif electronique les utilisant
US5915999A (en) * 1995-01-31 1999-06-29 Takenaka; Noriaki Press-fit connecting pin and electronic device using the same

Also Published As

Publication number Publication date
CH675929A5 (fr) 1990-11-15
EP0340574A3 (fr) 1990-09-12
US4936797A (en) 1990-06-26

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