EP0488487B1 - Press-fit connection pin - Google Patents

Press-fit connection pin Download PDF

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Publication number
EP0488487B1
EP0488487B1 EP91250319A EP91250319A EP0488487B1 EP 0488487 B1 EP0488487 B1 EP 0488487B1 EP 91250319 A EP91250319 A EP 91250319A EP 91250319 A EP91250319 A EP 91250319A EP 0488487 B1 EP0488487 B1 EP 0488487B1
Authority
EP
European Patent Office
Prior art keywords
press
connection pin
section
bore
transition region
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
EP91250319A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0488487A1 (en
Inventor
Peter Bose
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.)
ABB Installation Products Inc
Original Assignee
Thomas and Betts Corp
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 Thomas and Betts Corp filed Critical Thomas and Betts Corp
Publication of EP0488487A1 publication Critical patent/EP0488487A1/en
Application granted granted Critical
Publication of EP0488487B1 publication Critical patent/EP0488487B1/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

  • connection pin for insertion into a through-metallized bore in a printed circuit board comprising, in sequential order, a connection portion, a press-in portion, a transition region and an introduction portion, said introduction portion adapted to be inserted initially into said through-metallized bore, said transition region comprising three distinct sections, a first section adjoining said press-in portion of decreasing outer dimension, a second section adjoining said first section of substantially constant outer dimension and a third section of decreasing outer dimension adjoining said second section and said introduction portion.
  • connection pins of the press-fit kind are known for what is referred to as the solder-free connection procedure.
  • a known connection pin German patent specification No. 2,937,883
  • the press-in portion is cylindrical and the introduction portion is conical. That means that the outside diameter of that known connection pin increases to its full dimension without a transition in the plane between the introduction and the press-in portions. That further means that, when the connection pin is pressed into the bore in a printed circuit board, the connection pin suddenly enlarges the bore as soon as its press-in portion reaches the upper edge of the bore. The compacting effect on the material of the printed circuit board, which occurs in that situation, does not cause any further risk.
  • connection pin in the press-in portion thereof does not in any way alter that situation. It enhances the resiliency of the press-in portion and permits the limbs defining same to move towards each other when the press-in portion is pressed into the bore. However, it does not have any influence on the resiliency of the connection pin in the plane thereof between the introduction and the press-in portions. The connection pin remains stiff there.
  • connection pin U.S. patent No. 4,776,807
  • the press-in portion has three protrusions which are spaced around its periphery. As a result it no longer bears against the inside of the bore, with the entire periphery of the press-in portion, but only along three vertical extending lines. The risk of cuttings being formed and the danger of excessive deformation of the material of the printed circuit board may still occur.
  • connection pin as illustrated in the first paragraph of this specification is known (EP-A-0 225 400 and WO 86/04 743). Using this known connection pin generally does not scrape off the metallization of the bore. However, the material of the printed circuit board is still deformed.
  • the invention is based on the problem of designing a connection pin so that, when it is pushed into a printed circuit board, cuttings are by no means scraped off the metallization of the bore, nor is the material of the printed circuit board excessively deformed.
  • the solution to that problem is achieved in that the press-in portion comprises an outer dimension gradually decreasing in a direction toward the transition region and the outer configuration of said press-in portion tapers downwardly toward said transition region approximately 0.5 degrees.
  • the press-in portion has a generally cylindrical outer configuration.
  • the invention also proposes that the introduction portion is of a cross-section different from the cross-section of the press-in portion.
  • Figure 1 is a perspective view of the connection pin.
  • Figure 2 is a view in longitudinal section of part of the connection pin, taken along section line II - II in Fig. 1.
  • Figure 3 is a side view of the lower region of the connection pin of Fig. 2.
  • Figure 4 is a view in longitudinal section showing the lower region of the connection pin inserted into a part of a printed circuit board.
  • Figure 5 is a view in cross-section taken along section line V - V in Fig. 4.
  • Figure 6 is a view in cross-section taken along section line VI - VI in Fig. 4.
  • Figure 7 is a view in cross-section taken along section line VII - VII in Fig. 4.
  • Figure 1 shows the connection pin with its connection portion 12, its press-in portion 14 and a transition region 16 comprising first, second and third portions 18, 20 and 22, and with its introduction portion 24.
  • the introduction portion 24 is divided into a square portion 26 and a tip 28.
  • a recess 30 is disposed within the press-in portion 14, recess 30 having an upper portion 32 and a lower portion 34. The shape of those two portions 32 and 34 corresponds to the shape of the outside walls enclosing them.
  • the press-in portion 14 is of substantially C-shape.
  • the two limbs of the C-shape are identified by reference numeral 36 in Figs. 5 through 7.
  • the ends 38 thereof have rounded configurations 40 at their outward sides and rounded configurations 42 at their inward sides.
  • the printed circuit board, into the numerous bores in which connection pins are pressed, is seen in part in Figs. 4 through 7 and is identified by reference numeral 44.
  • the bore for receiving the connection pin 12 is identified by reference numeral 46.
  • Metallization 48 is provided on the inside wall thereof.
  • the press-in portion 14 does not bear against the metallization 48 or the bore 46 with the whole of its outside wall, but only at some locations.
  • the contact points are identified by reference numeral 50.
  • connection pin is made from a square starting metallic material with a cross-section of for example 1 mm2. In the final condition the outside diameter of the press-in portion 14 is more than the inside diameter of a bore 46.
  • connection pins may be urged into the metallized bores in a printed circuit board by a robot under the control of a computer, with a force of about 10 kg.
  • the tip 28 and then the square portion 26 pass into the bore 46. The latter is still not touched.
  • the third portion 22 then encounters, with its diameter which increases in an upward direction, the top edge of the bore 46.
  • the bore 46 is gradually enlarged in the further movement of the connection pin.
  • the second portion 20 then passes with its uniform diameter into the bore 46.
  • the material of the printed circuit board can settle and is not subjected to further deformation.
  • the first portion 18 passes with its diameter which increases again, into the bore 46.
  • the bore 46 is further enlarged.
  • the press-in portion 14 passes into the bore 46.
  • the conicity of 0.5° of the outside wall thereof is below the conicity of the first portion 18. Therefore, when the press-in portion 14 is passed into the bore 46, the bore is enlarged over a longer period of time, but to a lesser degree per unit of time. That means that the material of the printed circuit board including the conductor tracks or conductive layers disposed therein is neither damaged nor irregularly deformed.
  • the press-in portion 14 is pressed into the bore 46, the limbs 36 of the C-shape also move towards each other. That also provides careful treatment for the material of the printed circuit board 44 and the metallization 48.
  • Figures 4 through 7 show how the press-in portion 14 bears against the inside of the bore 46 or the metallization 48 thereof.
  • the press-in portion 14 contracts radially inwardly approximately at the halfway position in the height of the bore 46.
  • Figure 4 shows this condition.
  • the press-in portion 14 bears against the metallization 48 of the bore 46 only a short distance below the upper edge and a short distance above the lower edge of the bore.
  • Figure 4 also shows this condition.
  • the press-in portion 14 is constricted at its center. That phenomenon is referred to as a guitar effect.

Landscapes

  • Multi-Conductor Connections (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
EP91250319A 1990-11-29 1991-11-27 Press-fit connection pin Expired - Lifetime EP0488487B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9016257U 1990-11-29
DE9016257U DE9016257U1 (de) 1990-11-29 1990-11-29 Anschlußstift

Publications (2)

Publication Number Publication Date
EP0488487A1 EP0488487A1 (en) 1992-06-03
EP0488487B1 true EP0488487B1 (en) 1995-04-05

Family

ID=6859828

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91250319A Expired - Lifetime EP0488487B1 (en) 1990-11-29 1991-11-27 Press-fit connection pin

Country Status (6)

Country Link
EP (1) EP0488487B1 (ja)
JP (1) JP2718585B2 (ja)
AU (1) AU642555B2 (ja)
CA (1) CA2056713A1 (ja)
DE (2) DE9016257U1 (ja)
ES (1) ES2070422T3 (ja)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4400499C2 (de) * 1994-01-11 1996-05-02 Itt Cannon Gmbh Kontaktfeder-Anordnung
DE19545481A1 (de) * 1995-12-06 1997-06-12 Ge Tronic Geislinger Electroni Elektronisches Gerät
EP1420479B1 (en) * 2002-11-13 2011-12-21 Tyco Electronics AMP GmbH Plug connection device
ATE538513T1 (de) 2002-11-13 2012-01-15 Tyco Electronics Amp Gmbh Steckverbindereinrichtung
US9356367B2 (en) 2014-01-08 2016-05-31 Tyco Electronics Corporation Electrical connector having compliant contacts and a circuit board assembly including the same
DE102015200491A1 (de) * 2015-01-14 2016-07-14 Robert Bosch Gmbh Einpresskontakt mit einer einrollbar ausgebildeten Einpresszone
DE102017100724A1 (de) 2017-01-16 2018-07-19 Ludger Sorig Elektrisches Einpresskontaktelement
WO2021106546A1 (ja) * 2019-11-29 2021-06-03 株式会社オートネットワーク技術研究所 プレスフィット端子、プレスフィット端子付基板及び機器

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU565072B2 (en) * 1982-05-24 1987-09-03 Amp Incorporated Contact element
EP0134094B1 (en) * 1983-08-15 1987-05-27 AMP INCORPORATED (a New Jersey corporation) An improved compliant section for circuit board contact elements
US4776807A (en) * 1983-09-06 1988-10-11 Methode Electronics, Inc. Compliant contact
JPS6093777A (ja) * 1983-09-30 1985-05-25 シーメンス、アクチエンゲゼルシヤフト プリント配線板アセンブリ
EP0209542A1 (en) * 1985-02-05 1987-01-28 North American Specialities Corporation Compliant connector
GB8516610D0 (en) * 1985-07-01 1985-08-07 Bicc Plc Electrical contact
ATE61162T1 (de) * 1985-12-11 1991-03-15 Burndy Electra Nv Kontaktstift.
EP0449393B1 (en) * 1986-07-10 1994-12-14 The Whitaker Corporation Electrical terminal
CH675929A5 (ja) * 1988-05-06 1990-11-15 Cdm Connectors Dev & Mfg Ag

Also Published As

Publication number Publication date
AU642555B2 (en) 1993-10-21
DE69108685D1 (de) 1995-05-11
JP2718585B2 (ja) 1998-02-25
DE9016257U1 (de) 1991-04-04
JPH04269472A (ja) 1992-09-25
AU8819891A (en) 1992-06-04
ES2070422T3 (es) 1995-06-01
DE69108685T2 (de) 1995-08-17
EP0488487A1 (en) 1992-06-03
CA2056713A1 (en) 1992-05-30

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