EP0887883B1 - Press-fit terminal - Google Patents

Press-fit terminal Download PDF

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Publication number
EP0887883B1
EP0887883B1 EP98111479A EP98111479A EP0887883B1 EP 0887883 B1 EP0887883 B1 EP 0887883B1 EP 98111479 A EP98111479 A EP 98111479A EP 98111479 A EP98111479 A EP 98111479A EP 0887883 B1 EP0887883 B1 EP 0887883B1
Authority
EP
European Patent Office
Prior art keywords
press
contact
pin
slot aperture
contact spring
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
EP98111479A
Other languages
German (de)
French (fr)
Other versions
EP0887883A3 (en
EP0887883A2 (en
Inventor
Arnulf Maag
Wolfgang Neef
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.)
Elco Europe GmbH
Original Assignee
Elco Europe GmbH
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 Elco Europe GmbH filed Critical Elco Europe GmbH
Publication of EP0887883A2 publication Critical patent/EP0887883A2/en
Publication of EP0887883A3 publication Critical patent/EP0887883A3/en
Application granted granted Critical
Publication of EP0887883B1 publication Critical patent/EP0887883B1/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

Definitions

  • press-in contacts are described in EP-A-0 731 526 and EP-A-0 141 492 have become known and are used to produce solderless electrical connections that as a so-called press-fit connection can comply with DIN 41611, Part 5.
  • the generic press-in contact corresponds to the EE type because the Press-in region of its shaft part forming the actual press-in pin is elastic is formed, that is, by the forces necessary for the press-in connection Deformation of the elastic shaft part and that of the press-in contact PCB are applied - see section 3.2.2 of DIN 41611, part 5 -.
  • a press-in contact is known from German utility model G 90 04 090.2, in which the contact in a sleeve of a printed circuit board in the pressed state compared to other well-known press contacts is improved by the slit opening has the same parabolic shape at both ends, while constricting in the middle. This makes one too strong, unequal deformation of the legs delimiting the slot opening counteracted so that it does not straighten after a press-in process Need to become.
  • the invention has for its object to a generic press-in contact create, in which there is excessive hole wall deformation of the circuit board sleeve can be avoided.
  • An advantageous embodiment of the invention provides for the elasticity of the shaft part to be increased even further by the legs delimiting the slot opening on their Outside have an embossing that extends from the press-in shoulder to Extend the area of the pin.
  • the experiments have shown that despite the increased elasticity of the press-in contact the requirements for Minimum holding force of 20 N according to IEC 352-5 must be exceeded.
  • Tests confirmed that even after a thermal load of 500 h at 105 ° C. there is still a reliable electrical connection, which is indicated by a stable Contact resistance and the unchanged high holding forces can be recognized.
  • press-in contacts according to the invention due to their good elasticity can have a significantly shorter overall length and thus Particularly suitable for printed circuit boards with a nominal thickness of 1.6 mm.
  • a press-in contact 1 shown in FIG. 1 for pressing into a plated-through hole Hole in a printed circuit board has a central shaft part 2, to which the left over a press-in shoulder 3 connects a contact spring 4. To the front right end the shaft part 2 goes into a conical, tapering forward, one Pin 5 receiving head 17 over.
  • the shaft part 2 is with a conical slot opening 7 reaching into the area of the contact spring 4 provided, the upper and lower and front ends 8, 9 each have a has parabolic training.
  • the end 9 facing the contact spring 4 and having a parabolic design comprehensive part 10 of the conical slot opening 7 is formed wider than that other, front part 11, which has a waist 12 approximately in the middle of the slot opening 7 has, then slightly expanded again and then towards pin 5 rejuvenated.
  • the parabolic end 9 of the slot opening facing the contact spring 4 extends into the contact spring 4 and is thus after a press-in process outside the circuit board.
  • the other, narrower end 8 of the slot opening 7 is located on the other hand in the circuit board and ends at a distance 13 in the transition between the shaft part 2 and the connecting pin 5.
  • the outer jacket of the press-in contact 1 has the slot opening 7 on both sides in the middle shaft part 2 each have a leg 14 and 15; these have a convex External shape and are each along their length between the press-in shoulder 3 and Area of the connecting pin 5 with a running out above the head piece 17 Embossing 16 provided. Due to the design and location of the slot opening 7 and the leg 14 and 15 with their stamping 16 becomes the entire press-in contact 1 more elastic, which on the one hand leads to the contact becoming nonetheless at the same time high holding forces can be pressed in with reduced force and on the other hand one Hole wall deformation can be reduced. Nevertheless, there is still a good one Contact between the middle shaft part 2 and the plated-through hole 6 in the circuit board.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
  • Multi-Conductor Connections (AREA)
  • Adornments (AREA)
  • Paper (AREA)
  • Automatic Assembly (AREA)

Description

Die Erfindung betrifft einen Einpreßkontakt zum Einpressen in ein durchkontaktiertes Loch einer Leiterplatte mit

  • einer Kontaktfeder oder einem Kontaktstift,
  • einem sich daran anschließenden mittleren Schaftteil und
  • einem eine Verlängerung des mittleren Schaftteils bildenden Anschlußstift,
bei dem die Kontaktfeder oder der Kontaktstift im Übergangsbereich zum Schaftteil eine Einpreßschulter aufweist, und der Schaftteil mit einer seitlich von Schenkeln begrenzten, kegelförmigen Schlitzöffnung versehen ist, die an ihren Enden eine annähernd parabolische Ausbildung hat, wobei das der Kontaktfeder bzw. dem Kontaktstift zugewandte Ende der Schlitzöffnung bis in die Kontaktfeder oder den Kontaktstift hineinreicht.The invention relates to a press-in contact for pressing into a plated-through hole in a printed circuit board
  • a contact spring or a contact pin,
  • an adjoining middle shaft part and
  • a connecting pin forming an extension of the middle shaft part,
in which the contact spring or the contact pin has a press-in shoulder in the transition region to the shaft part, and the shaft part is provided with a tapered slot opening laterally delimited by legs, which has an approximately parabolic design at its ends, the end facing the contact spring or the contact pin the slot opening extends into the contact spring or the contact pin.

Derartige Einpreßkontakte sind durch die EP-A- 0 731 526 und EP-A-0 141 492 bekanntgeworden und dienen zur Herstellung lötfreier elektrischer Verbindungen, die als sogenannte Einpreßverbindung der DIN 41611, Teil 5 entsprechen können. Demnach entspricht der gattungsgemäße Einpreßkontakt der Bauform EE, weil der Einpreßbereich seines den eigentlichen Einpreßstift bildenden Schaftteils elastisch ausgebildet ist, also die für die Einpreßverbindung notwendigen Kräfte durch Verformung des elastischen Schaftteils und der den Einpreßkontakt aufnehmenden Leiterplatte aufgebracht werden - siehe Abschnitt 3.2.2 der DIN 41611, Teil 5 -.Such press-in contacts are described in EP-A-0 731 526 and EP-A-0 141 492 have become known and are used to produce solderless electrical connections that as a so-called press-fit connection can comply with DIN 41611, Part 5. Accordingly, the generic press-in contact corresponds to the EE type because the Press-in region of its shaft part forming the actual press-in pin is elastic is formed, that is, by the forces necessary for the press-in connection Deformation of the elastic shaft part and that of the press-in contact PCB are applied - see section 3.2.2 of DIN 41611, part 5 -.

Aus dem deutschen Gebrauchsmuster G 90 04 090.2 ist ein Einpreßkontakt bekannt, bei dem die Kontaktgabe in einer Hülse einer Leiterplatte im eingepreßten Zustand gegenüber anderen hinlänglich bekannten Einpreßkontakten verbessert wird, indem die Schitzöffnung an ihren beiden Enden eine gleiche parabolische Ausbildung hat, während sie in ihrer Mitte eine Einschnürung aufweist. Damit wird einer zu starken, ungleichen Verformung der die Schlitzöffnung begrenzenden Schenkel entgegengewirkt, so daß diese nach einem Einpreßvorgang nicht nachgerichtet werden müssen.A press-in contact is known from German utility model G 90 04 090.2, in which the contact in a sleeve of a printed circuit board in the pressed state compared to other well-known press contacts is improved by the slit opening has the same parabolic shape at both ends, while constricting in the middle. This makes one too strong, unequal deformation of the legs delimiting the slot opening counteracted so that it does not straighten after a press-in process Need to become.

Es hat sich jedoch gezeigt, daß es bei einem Einpreßvorgang des bekannten Einpreßkontaktes in die Leiterplattenhülse zu einer Lochwandverformung der mit Zinn beschichteten Kupferhülse kommen kann. Das hat den Nachteil, daß es beim Einpressen zu einem sogenannten Jet-Effekt kommt, d.h. es wird Kupfer- und Zinnmaterial in die Hülse hineingezogen; dies kann sogar dazu führen, daß dabei Kupferbahnen abgerissen werden, was besonders häufig beim Einsatz von Multilayer-Leiterplatten zu beobachten ist.However, it has been shown that it is during a press-in process of the known Press-in contact in the circuit board sleeve to a perforated wall deformation with tin coated copper sleeve can come. This has the disadvantage that it Pressing comes in a so-called jet effect, i.e. it becomes copper and Tin material drawn into the sleeve; this can even result in doing so Copper tracks are torn down, which is particularly common when using Multilayer circuit boards can be observed.

Der Erfindung liegt die Aufgabe zugrunde, einen gattungsgemäßen Einpreßkontakt zu schaffen, bei dem sich eine zu starke Lochwandverformung der Leiterplattenhülse vermeiden läßt.The invention has for its object to a generic press-in contact create, in which there is excessive hole wall deformation of the circuit board sleeve can be avoided.

Diese Aufgabe wird erfindungsgemäß mit den im kennzeichnenden Teil des unabhängigen Anspruchs angegebenen Merkmalen gelöst.This object is achieved with the in the characterizing part of Independent claim specified features solved.

Es hat sich bei Versuchen herausgestellt, daß durch die erfindungsgemäße Ausgestaltung der Schlitzöffnung eine Elastizitätssteigerung der Einpreßzone des Einpreßkontaktes erreicht wird, indem sich die kegelförmige Schlitzöffnung beim Einpressen im Bereich ihrer Taillierung weiter zusammendrückt. Dies führt zu einer geringeren Belastung der Leiterplattenhülse und zu einer wünschenswerten Reduzierung der Einpreßkräfte. Durch die Neuerung wird eine wesentliche Verbesserung der Lochwandverformung erreicht, womit der eingangs beschriebene Jet-Effekt allenfalls noch mit unschädlicher Wirkung auftreten kann. Trotz der hohen Elastizität wird der Einpreßkontakt beim Einpressen nicht beschädigt, weil die die Schlitzöffnung begrenzenden Schenkel - welche an ihren Außenseiten konvex geformt sind - nicht in Richtung Schlitzöffnung einfallen, so daß sie über ihre gesamte Länge an der Lochwand der Hülse anliegen und damit auch eine gute Kontaktgabe gewährleisten.It has been found in tests that the inventive Design of the slot opening an increase in elasticity of the press-in zone Press-in contact is achieved by the conical slot opening at Press in further in the area of your waist. This leads to a less stress on the circuit board sleeve and at a desirable Reduction of press-in forces. The innovation will be an essential one Improvement of the hole wall deformation achieved, with which the above described Jet effect can still occur with a harmless effect. Despite the high The elasticity of the press-in contact is not damaged when the press-in, because that Slit opening limiting leg - which is convex on the outside are - do not collapse in the direction of the slot opening, so that they extend over their entire length lie against the perforated wall of the sleeve and thus also good contact guarantee.

Eine vorteilhafte Ausgestaltung der Erfindung sieht vor, die Elastizität des Schaftteils noch weiter zu steigern, indem die die Schlitzöffnung begrenzenden Schenkel an ihren Außenseiten eine Anprägung aufweisen, die sich von der Einpreßschulter bis zum Bereich des Anschlußstiftes erstrecken. Bei den Versuchen hat sich gezeigt, daß trotz der gesteigerten Elastizität des Einpreßkontaktes die Anforderungen an die Mindesthaltekraft von 20 N nach IEC 352-5 überschritten werden. Des weiteren haben Versuche bestätigt, daß auch nach einer thermischen Belastung von 500 h bei 105°C weiterhin eine zuverlässige elektrische Verbindung besteht, was durch einen stabilen Übergangswiderstand und an den unverändert hohen Haltekräften erkennbar ist.An advantageous embodiment of the invention provides for the elasticity of the shaft part to be increased even further by the legs delimiting the slot opening on their Outside have an embossing that extends from the press-in shoulder to Extend the area of the pin. The experiments have shown that despite the increased elasticity of the press-in contact the requirements for Minimum holding force of 20 N according to IEC 352-5 must be exceeded. Furthermore have Tests confirmed that even after a thermal load of 500 h at 105 ° C. there is still a reliable electrical connection, which is indicated by a stable Contact resistance and the unchanged high holding forces can be recognized.

Es hat sich auch gezeigt, daß die erfindungsgemäßen Einpreßkontakte aufgrund ihrer guten Elastizität eine wesentlich geringere Baulänge aufweisen können und sich somit insbesondere für Leiterplatten mit einer Nenndicke von 1,6 mm eignen.It has also been shown that the press-in contacts according to the invention due to their good elasticity can have a significantly shorter overall length and thus Particularly suitable for printed circuit boards with a nominal thickness of 1.6 mm.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus den Patentansprüchen und der nachfolgenden Beschreibung, in der ein Ausführungsbeispiel des Gegenstandes der Erfindung näher erläutert ist. Es zeigen:

Fig. 1
einen Einpreßkontakt mit einem mittleren Schaftteil, der zur einen Seite hin mit einer Kontaktfeder und zur anderen Seite hin mit einem Anschlußstift gefertigt ist, in der Geamtansicht dargestellt; und
Fig. 2
den in ein durchkontaktiertes Loch eingepreßten Einpreßkontakt gemäß Fig. 1, von rechts her gesehen.
Further features and advantages of the invention result from the patent claims and the following description, in which an embodiment of the subject matter of the invention is explained in more detail. Show it:
Fig. 1
a press-in contact with a central shaft part, which is made on one side with a contact spring and on the other side with a connecting pin, shown in the entire view; and
Fig. 2
seen from the right the press-in pressed into a plated-through hole according to FIG. 1.

Ein in Fig. 1 gezeigter Einpreßkontakt 1 zum Einpressen in ein durchkontaktiertes Loch einer Leiterplatte besitzt einen mittleren Schaftteil 2, an den sich nach links über eine Einpreßschulter 3 eine Kontaktfeder 4 anschließt. Zum vorderen, rechten Ende hin geht der Schaftteil 2 in ein konisches, sich nach vorne verjüngendes, einen Anschlußstift 5 aufnehmendes Kopfstück 17 über. Der Schaftteil 2 ist mit einer kegelförmigen, bis in den Bereich der Kontaktfeder 4 reichenden Schlitzöffnung 7 versehen, deren oberes und unteres bzw. vorderes Ende 8, 9 jeweils eine parabolische Ausbildung besitzt.A press-in contact 1 shown in FIG. 1 for pressing into a plated-through hole Hole in a printed circuit board has a central shaft part 2, to which the left over a press-in shoulder 3 connects a contact spring 4. To the front right end the shaft part 2 goes into a conical, tapering forward, one Pin 5 receiving head 17 over. The shaft part 2 is with a conical slot opening 7 reaching into the area of the contact spring 4 provided, the upper and lower and front ends 8, 9 each have a has parabolic training.

Der der Kontaktfeder 4 zugewandte, das parabolisch ausgebildete Ende 9 umfassende Teil 10 der kegelförmigen Schlitzöffnung 7 ist breiter ausgeformt als der andere, vordere Teil 11, der etwa in der Mitte der Schlitzöffnung 7 eine Taillierung 12 aufweist, sich dann wieder geringfügig erweitert und sich dann zum Anschlußstift 5 hin verjüngt. Das der Kontaktfeder 4 zugewandte parabolische Ende 9 der Schlitzöffnung reicht bis in die Kontaktfeder 4 hinein und liegt somit nach einem Einpreßvorgang außerhalb der Leiterplatte. Das andere, schmalere Ende 8 der Schlitzöffnung 7 liegt hingegen in der Leiterplatte und endet in einem Abstand 13 in dem Übergang zwischen dem Schaftteil 2 und dem Anschlußstift 5.The end 9 facing the contact spring 4 and having a parabolic design comprehensive part 10 of the conical slot opening 7 is formed wider than that other, front part 11, which has a waist 12 approximately in the middle of the slot opening 7 has, then slightly expanded again and then towards pin 5 rejuvenated. The parabolic end 9 of the slot opening facing the contact spring 4 extends into the contact spring 4 and is thus after a press-in process outside the circuit board. The other, narrower end 8 of the slot opening 7 is located on the other hand in the circuit board and ends at a distance 13 in the transition between the shaft part 2 and the connecting pin 5.

Der Außenmantel des Einpreßkontaktes 1 weist beidseitig der Schlitzöffnung 7 in dem mittleren Schaftteil 2 je einen Schenkel 14 und 15 auf; diese haben eine konvexe Außenform und sind jeweils über ihre Länge zwischen Einpreßschulter 3 und dem Bereich des Anschlußstiftes 5 mit einer oberhalb des Kopfstückes 17 auslaufenden Anprägung 16 versehen. Durch die Gestaltung und Lage der Schlitzöffnung 7 sowie der Schenkel 14 und 15 mit ihrer Anprägung 16 wird der gesamte Einpreßkontakt 1 elastischer, was einerseits dazu führt, daß der Kontakt sich bei dennoch gleichzeitig hohen Haltekräften mit verminderter Kraft einpressen läßt und sich andererseits eine Lochwandverformung reduzieren läßt. Gleichwohl besteht weiterhin eine gute Kontaktgabe zwischen dem mittleren Schaftteil 2 und dem durchkontaktierten Loch 6 in der Leiterplatte.The outer jacket of the press-in contact 1 has the slot opening 7 on both sides in the middle shaft part 2 each have a leg 14 and 15; these have a convex External shape and are each along their length between the press-in shoulder 3 and Area of the connecting pin 5 with a running out above the head piece 17 Embossing 16 provided. Due to the design and location of the slot opening 7 and the leg 14 and 15 with their stamping 16 becomes the entire press-in contact 1 more elastic, which on the one hand leads to the contact becoming nonetheless at the same time high holding forces can be pressed in with reduced force and on the other hand one Hole wall deformation can be reduced. Nevertheless, there is still a good one Contact between the middle shaft part 2 and the plated-through hole 6 in the circuit board.

Claims (3)

  1. A press-in contact (1) for pressing the following into a through-plated hole (6) of a circuit board comprising:
    a contact spring (4) or a contact pin;
    a connecting middle part of a shank (2); and
    a connection pin (5) which forms an extension of the middle part of the shank;
    in which the contact spring (4) or the contact pin in the transition area to the part of the shank comprises a press-in shoulder (3), and the part of the shank (2) comprises a conical slot aperture (7) which is laterally delimited by legs; with the ends of said slot aperture (7) being of approximately parabolic shape, wherein the end (9) of the slot aperture (7), which end faces the contact spring or the contact pin (4), reaches into the contact spring or the contact pin (4),
    characterised in that
    the end (9) of the conical slot aperture (7) facing the contact spring or the contact pin (4) is shaped wider than the torpedo-shaped end (8) which faces the connection pin (5), and the slot aperture (7) comprises a throated section (12) between these two parabolic sections.
  2. The press-in contact according to claim 1,
    characterised in that
    the outsides of the legs (14, 15) which delimit the slot aperture (7) comprise a stamped shape (16).
  3. The press-in contact according to claim 2,
    characterised in that
    the stamped shape (16) extends from the press-in shoulder (3) to the area of the connection pin (5).
EP98111479A 1997-06-24 1998-06-23 Press-fit terminal Expired - Lifetime EP0887883B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19726759 1997-06-24
DE19726759A DE19726759A1 (en) 1997-06-24 1997-06-24 Press-in contact

Publications (3)

Publication Number Publication Date
EP0887883A2 EP0887883A2 (en) 1998-12-30
EP0887883A3 EP0887883A3 (en) 1999-12-08
EP0887883B1 true EP0887883B1 (en) 2003-02-26

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP98111479A Expired - Lifetime EP0887883B1 (en) 1997-06-24 1998-06-23 Press-fit terminal

Country Status (8)

Country Link
US (1) US6077128A (en)
EP (1) EP0887883B1 (en)
JP (1) JPH1170419A (en)
CN (1) CN1132272C (en)
DE (2) DE19726759A1 (en)
ES (1) ES2193441T3 (en)
SG (1) SG72837A1 (en)
TW (1) TW417340B (en)

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CN111509440B (en) 2020-04-24 2021-09-10 东莞立讯技术有限公司 A kind of interface unit
CN112194007B (en) * 2020-09-10 2022-09-13 中车长春轨道客车股份有限公司 Automatic adjusting device for detecting side wall of railway vehicle

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TW417340B (en) 2001-01-01
US6077128A (en) 2000-06-20
CN1208265A (en) 1999-02-17
CN1132272C (en) 2003-12-24
JPH1170419A (en) 1999-03-16
DE59807280D1 (en) 2003-04-03
EP0887883A3 (en) 1999-12-08
EP0887883A2 (en) 1998-12-30
DE19726759A1 (en) 1999-01-07
ES2193441T3 (en) 2003-11-01
SG72837A1 (en) 2000-05-23

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