EP3349307A1 - Élément de contact électrique à enfoncement - Google Patents

Élément de contact électrique à enfoncement Download PDF

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Publication number
EP3349307A1
EP3349307A1 EP18150776.5A EP18150776A EP3349307A1 EP 3349307 A1 EP3349307 A1 EP 3349307A1 EP 18150776 A EP18150776 A EP 18150776A EP 3349307 A1 EP3349307 A1 EP 3349307A1
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EP
European Patent Office
Prior art keywords
press
contact
section
contact element
fit
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.)
Granted
Application number
EP18150776.5A
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German (de)
English (en)
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EP3349307B1 (fr
Inventor
Ludger Sorig
Hartwig Stein
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Individual
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Individual
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Publication date
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Publication of EP3349307A1 publication Critical patent/EP3349307A1/fr
Application granted granted Critical
Publication of EP3349307B1 publication Critical patent/EP3349307B1/fr
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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
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/03—Contact members characterised by the material, e.g. plating, or coating materials
    • 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 press-fit contact element having at least one press-in portion which extends in a direction of extension from a root portion in which the press-in portion is connected to a contact body to a free end, and which has a central zone, the double-sided from the root portion to the free end flanked by a respective edge zone, wherein the edge zones form technological contact surfaces, which abut after insertion of the press-in in a press-in opening, for example, a circuit board to the wall of the press-in.
  • a press-fit contact element is made of DE 198 31 672 B4 previously known.
  • the press-fit contact element disclosed therein has a press-fit section which is connected to a contact body.
  • the contact body has a contact element.
  • the press-in portion is pin-shaped and can pass into conductive connecting resiliently biased contact with the inner wall of a hole forming a press-fit opening of a printed circuit board.
  • the application of the force to push the press-in section into the plated-through hole of the printed circuit board is effected by an axial application to a press-in shoulder, which is formed by the contact body.
  • the bulbous or oblique shape of the contact used in the prior art until reaching its largest outer diameter has proven to be advantageous for achieving the lowest possible Eindgur expert.
  • Such press-fit contacts are used for the production of solderless electrical connections according to DIN EN 60352-5 and are in Formed longitudinally from the press-in end with an integrally connected plug, connection area or stamped grid.
  • the press-in portion is designed to be elastic, and presses with relatively little force on the hole wall.
  • a relatively low normal force of the voltage applied to the hole wall legs of the press-in sections is desirable.
  • the required squeezing force of the press-in sections from the PCB holes must be relatively high.
  • this quality-important requirement is not attainable with small material thicknesses of the press-fit contact formed by press-in sections, in particular if the normal force of the legs of the press-fit contacts is low.
  • a low squeezing force or holding force is also at vibration stresses, such as occur in automotive applications in the engine compartment, disadvantageous because the contacts can loosen, thereby increasing the contact resistance. Such damage can lead to total failure of the electrical connection.
  • press-in contacts are connected in a uniform manner with continuous areas. These can be designed as socket contacts for round or flat plugs, crimp connections, insulation displacement connections, film connections or stamped grid, etc.
  • Such applications require resilient, resilient properties to allow proper contact with the mating connector or connector. Therefore, the material thickness is usually low, for example 0.3 mm. However, this thickness is sometimes insufficient to meet the above requirements for such press-fit contacts.
  • the desired high Current carrying capacity and the desired cold welding often can not be achieved. Therefore, in the prior art, such components are made of step-milled strip material.
  • the strip for example, has to be reduced 0.8 mm thick for the area of the press-in zone to 0.3 mm in the area of the subsequent contact areas. Since this process is usually carried out by milling, such bands are expensive.
  • press-fit contacts which are made of bright strip, provided in a further step with a galvanic surface. This consists because of the required cold welding with the through-connection of the circuit board and the lead refinery of pure tin.
  • galvanically pure tin-plated surfaces under pressure and bending stress which are produced in a press-fit connection are known to be susceptible to whisker formation. These whiskers are undesirable and can cause short circuits in the application.
  • the prior art also includes the DE 38 31 508 C2 and the US 4,017,143 , each showing an electrical press-fit contact element, in which the press-in section receives a cross-sectional profiling by embossing with an embossing punch.
  • the US 6,132,225 discloses a press-in portion which is curved over its entire extension direction around a single bending line, so that form projecting edge zones from the original extension plane of the sheet metal blank.
  • the DE 10 2014 107 438 A1 discloses a slotted press-in portion with an impressed recess.
  • the DE 20 2009 009 933 U1 discloses a slotted press-in section with embossments on both sides, so that webs form in a contact region.
  • the DE 20 2016 102 148 U1 discloses a press-fit portion consisting of two parallel legs.
  • the EP 0 313 300 A1 discloses a press-in portion, in the contact region of a cross-sectionally V-shaped groove is impressed.
  • the DE 90 16 257 U1 and the DE 10 2015 200 491 A1 disclose press-in sections with depressions pressed into the contact area.
  • the DE 11 2006 000 095 T5 discloses a press-fit with separated by a free space, elastically to each other movable leg.
  • the invention has for its object to develop the above-mentioned electrical contact element nutzsvorteilhaft and in particular to change the elastic region of the press-in such that the normal force of the two legs of the press-in is relatively low, and in particular that a bulbous or oblique portion of the press-fit is maintained until reaching the largest enveloping circle diameter of the contact.
  • the edge zone is bent away from the middle zone.
  • the press-in section has a U-shaped or C-shaped cross-section.
  • An S-shaped or Z-shaped cross section is possible. In a cross-sectional plane through the direction of extension of the press-in section, this results in the formation of a curved strip of material whose edge is formed by the edge zones and whose central section is formed by the central zone.
  • the press-in section preferably has such a curved shape over its entire length.
  • the press-fit contact element has a press-in section, which is formed by a flat piece whose edge zones are bent away from the central zone in each case around a bending line.
  • the U or C or Z cross-sectional profiling is produced by a bending deformation around a bending line in which the narrow edges of the flat piece point in the direction of the broad side of the flat piece after the bending deformation and the contact surfaces are formed by the edge portions of the broad side surfaces of the flat piece.
  • the central portion may extend along a straight line, this may, if the press-in section in cross section has a U-shape, form the U-leg.
  • the two edge zones then form the two U-legs.
  • the two edge portions in directions pointing away from each other.
  • the edge zones preferably form webs projecting from the central zone. It can get in between the fringes Canal extend, whose bottom is the middle zone.
  • the press-in section is preferably a material-integral part of a stamped and bent part from which the press-in contact element is made.
  • the press-fit contact element may have a plurality of press-in sections extending parallel to one another. Each press-in section preferably forms an outer surface and one of these opposite inner surface. The outer surface and the inner surface are formed by the two opposite broad side surfaces of the sheet metal part from which the Einpressessorelement is formed. The edge zones are bent away from the plane of extension of the sheet.
  • the outer surface of the press-fit portion has a rounded portion which in particular connects an outer surface portion of the central zone to the contact surface formed by an outer surface portion of the rim region.
  • An inner surface of the press-in section may have a section associated with the central zone and a section extending substantially perpendicularly thereto.
  • the middle zone of the associated portion of the inner surface is flanked on both sides by portions of the inner surface of the edge zone, which are perpendicular to the portion of the central zone.
  • the two mutually parallel sections of the inner surface adjoin each other at bending lines.
  • an outline contour line of the press-in section extends in an arcuate manner in a connection region, wherein the connection region extends from a first narrow region of the press-fit section to the root region.
  • the connection area is adjoined by a contact area, in which the contact areas which come into electrical contact with the plated-through press-in openings are located.
  • the Contact area has the floor plan of Einpressabêtes a bulbous shape.
  • the outline contour line extending on a curved line, wherein the two arc lines are directed away from each other, so that between two narrow areas of the press-in section forms a large diameter area in which the contact surfaces are arranged.
  • a slot In the contact region, which extends between connection region and end region, a slot, an embossing and / or a curvature is preferably arranged.
  • the indentation may have rounded edge edges and be arranged in the region of the slot, wherein the indentation is formed in particular on the inner surface.
  • the inner surface of the opposite outer surface preferably has a curvature, which is opposite to the imprint.
  • a press-in section of a generic press-fit contact element is given increased stability.
  • a slot extending in the central zone and flanked on both sides by the contact surfaces.
  • the slot divides the press-in portion into two contact legs, which can elastically deform toward one another.
  • the normal force of the contact legs of the press-in contact is relatively low according to the invention.
  • the bulbous or oblique region of the contact surface or of the outer surface formed by the edge zone is maintained until reaching the largest enveloping circle diameter of the contact, whereby small indentation forces arise.
  • the pressing forces or the holding forces arising when expressing the press-in contact remain relatively high.
  • the material thickness of the material uniformly connected to the contact body press-fit is the same.
  • the stability of the press-fit has increased because of the curved edge zone. Furthermore, the contact area has also increased. It is thus given a relatively high current carrying capacity.
  • the through-connection of a printed circuit board is not damaged when inserting the press-in section.
  • the contact resistance is low.
  • the entire component is preferably made of the same material from a band of the same thickness with a uniform precoating.
  • the tape has a pre-coated surface.
  • a galvanic coating is possible, but preferably not required.
  • the surface may also be electroplated with silver or a silver-tin alloy, gold or other suitable metal. The coating can also be applied later.
  • the contact body and the press-in section are produced from a precoated metal strip.
  • the manufacturing steps are essentially punching and bending.
  • outwardly curved press-in sections are formed which have contact limbs.
  • the contact legs which are separated from each other by the slot, then preferably each have an L-shape.
  • the outwardly curved contact legs along the outer contour bending bent up webs, which serve as contact surfaces and for stabilization and by pressure deformation on one side have a depression in the form of a dome similar, whose outer radius is smaller than the outer radius of the bulbous shape of the press-fit.
  • the calotte in particular produced by embossing, is slit centrally with said slot.
  • the width or length of this slot causes a change in the material cross-section and thus an adjustability of the normal force. This is especially important if the press-fit as a direct plug is used for printed circuit board perforations, for stabilizing the area between the press-in portion and a contact element, which is formed by the contact body.
  • the contact body has a stiffening bead in the root area, which, if the contact body is a hollow body, is preferably arched inwards.
  • the contact elements may be made of a copper alloy.
  • the contact element is a socket contact, an insulation displacement connection, a foil connection or a crimp connection.
  • the socket contact may have a cutout. There is also provided a positioning stop which abuts against the surface of the printed circuit board during the pressing of the press-fit contact element.
  • the socket contact may have a plurality of curved contact blades. Between the contact blades, a slot for a plug is formed.
  • the contact blades may be provided with radius-shaped contact points, in the extension of which a further radius is arranged on the end face to bear on the bushing wall, which is formed in particular by the inner wall of the contact body designed as a hollow body.
  • the between the over the entire length of the press-fitting extending channel is bounded by the two webs.
  • the two webs form substantially flat channel inner walls, which merge to form a kink or bending line in a flat channel bottom, which is formed by the central zone.
  • the two webs have over their entire extension length a constant height.
  • the outer walls of the webs, which form the contact surfaces in the contact region extend at least in regions to planes which, with the formation of curves, merge into an outer wall lying opposite the bottom of the channel.
  • the contour line of the webs runs in the plane of the central zone along arc lines, which have the central region of the inlet section their maximum distance from each other.
  • the EinpressCount institute shown in the drawings are made of a metal strip as a starting material.
  • the metal strip may be a tinned metal strip.
  • the metal strip consists of a non-ferrous metal and in particular of a copper alloy.
  • a stamped part is produced in a stamping process from the metal strip, which can subsequently be galvanically coated.
  • the press-in contact element receives its final shape, which is shown in the figures.
  • the Einpresskingelement has a contact body 1, which may be designed according to the application and may have variously shaped contact elements 14, with which the contact body 1 in electrically conductive contact with a cable or another electrically conductive material can be brought.
  • the contact body 1 is materially connected to at least one press-in section 2, which can be inserted into a plated-through press-in opening of a printed circuit board.
  • the contact body 1 has a positioning stop 15, which rests in the pressed state on a broad side plane of the circuit board.
  • FIGS. 1 to 6 illustrated first embodiment has a box-shaped contact body 1, which forms a hollow body.
  • On a contact side of the contact body 1 has a slot for inserting a plug.
  • the contact elements 14, which project from the slot edge, form lamellae which project into the cavity of the contact body 1.
  • the contact elements 14 form inwardly curved contact blades, which abut with rounded contact points on a plugged into the socket contact plug.
  • the contact blades continue beyond the contact points and also form there roundings.
  • a rounding section can rest on the inner wall of the contact body 1.
  • the contact body 1 is formed by a metal sheet, which is brought into a box shape. At the separation points, there is a Verclinchung 17th
  • FIG. 13 illustrated embodiment of a press-fit contact element has a contact element 14 in the form of a crimp connection.
  • That in the FIG. 15 illustrated embodiment has a contact element 14 in the form of a insulation displacement connection and in the FIGS. 16, 17 illustrated embodiment has a contact element 14 in the form of a film connection.
  • the press-in section 2 in the FIGS. 13 to 17 illustrated embodiments and the press-in sections 2 of the in the FIGS. 1 to 6 shown Embodiment is in the FIGS. 7 to 12 shown enlarged and will be described below.
  • the press-in portion 2 extends in a direction of extension E of a root portion 3, which lies in a connection region B, and in which the press-in portion 2 is materially connected to the contact body 1, via a contact region A to a free end 4, which is the end of a End region C forms.
  • the press-in section 2 is formed by a narrow metal strip which has a central zone 5 which is flanked on both sides by an edge zone 6 over its entire length extending from the root zone 3 to the free end 4. An outline contour line 2 'of the press-in section 2 is thus formed by the two edge zones 6.
  • the two edge zones 6 form from the plane of extension of the central zone 5 bent webs, which give the cross-section of the press-in section 2 a U-shape.
  • the edge zones 6 are bent away from the middle zone 5 in the same direction. But it is also envisaged that the edge zones 6 are bent away from each other in different directions from the central zone 5, so that the webs protrude in directions away from each other from the central zone 5.
  • Such a press-in section may have an S-shaped or Z-shaped cross section.
  • the webs formed by the edge zones 6 pass obliquely into the surface of the contact body 1 in the root area 3.
  • the narrow area in the transition area between the connection area B and the contact area A corresponds approximately to the distance of the two contour lines 2 'in the region of the free end 4th
  • connection area A of the press-in section 2 has a bulbous contour.
  • the cross-sectional length of the central zone 5 is about twice as long as the two substantially perpendicular to the central zone 5 extending edge zones 6.
  • An outer surface 8 of the press-in section 2 extends in a portion 8 'of the central zone 5 is substantially flat and forms in the transition region to the edge zone 6 a rounded portion 8 '''from.
  • the rounded portion 8 ''' connects the substantially flat portion 8' with a likewise rounded or only partially planar portion 8 "which forms a contact surface
  • the outer surface portion 8" forming the contact surface is formed from the outside of the central zone 5 and lies within Pressed state of the plated-through wall of the press-in opening of the circuit board electrically conductive.
  • the rounding of the section 8 can continue up to a section 9" of an inner surface 9, which is opposite to the outer surface 8.
  • the inner surface section 9 runs essentially flat and is assigned to the edge zone 6.
  • the inner surface section 9 with the formation of a bending line 9 ''', proceeds to form a planar inner surface section 9' approximately at right angles, which runs parallel to the outer surface section 8 ' , It thus forms a channel 7 with channel walls 9 "and a channel bottom 9 '.
  • the bending line 9 "essentially follows the outline contour line 2 ', which runs at the same distance from the outline contour line 2'.
  • the middle zone 5 has in the connection region B, ie in the region of its greatest width, extending in the direction of extension E slot 10 which separates the press-in section 2 there in two contact legs which are elastically movable toward each other, wherein the width of the slot 10 is reduced ,
  • an impression 12 which is formed like a dome and a rounded edge 12 ', which adjoins the bending line 9' '' in a vertex area.
  • the imprint 12 is assigned to the inner surface 9.
  • the impression 12 opposite region of the outer surface 8 has a curvature eleventh
  • a reinforcing bead 13 is furthermore provided which extends into the root area 3 and which sits approximately in the axial center of the press-in section 2.
  • An electrical press-fit contact element characterized in that the edge zones 6 are bent away from the middle zone 5 around a bending line.
  • An electrical press-fit contact element which is characterized in that the press-in portion 2 has a cross-sectionally U- or C-shaped configuration.
  • An electrical press-fit contact element which is characterized in that the edge zones 6 form webs projecting from the central zone 5.
  • An electrical press-fit contact element which is characterized in that an outer surface 8 of the press-in section 2 has a rounded portion 8 '", which in particular connects an outer surface section 8' of the central zone 5 with the contact surface 8".
  • An electrical press-fit contact element which is characterized in that an inner surface 9 of the press-in section 2 has a section 9 'assigned to the center zone 5 and sections 9 "running essentially perpendicular thereto, which are assigned to the edge zones 6, which in particular form bending lines 9'. '' are bent out of the plane of extension of the central zone 5.
  • An electrical press-fit contact element which is characterized in that a contour contour line 2 'of the press-in section 2 lying in the plane of extent of the central zone 5 extends in an arcuate manner in a connection region B extending from a first narrow region to the root region 3.
  • An electrical press-fit contact element which is characterized in that the center zone 5 in a lying between the terminal region B and the free end 3 associated end region C contact area A extending in the direction of extension E slot 10, a Imprint 12 and / or has a curvature 11, wherein it is provided in particular that the indentation 12 has rounded edges, the inner surface 9 is associated and / or the buckle 11 is opposite.
  • An electrical press-fit contact element which is characterized in that the outline contour line 2 'of the press-in section 2 extends in the connection region B and / or in the contact region A along lines bent away from one another.
  • An electrical press-fit contact element which is characterized in that one or more press-in sections 2 are materially connected to the contact body 1, the contact body 1 and the at least one press-in section 2 consist of a uniform starting material, wherein the press-in contact element preferably made of a metal-coated, for example, silver plated, gold-plated or vorverzinntem tape, in particular fireproof-tinned tape is manufactured as a stamped and bent part, in the root region 3 has a reinforcing bead 13.
  • An electrical press-fit contact element characterized in that the material of the press-fit contact element is a copper alloy.
  • An electrical press-fit contact element which is characterized in that the contact body 1 contact elements 14, in particular form a female contact and that the contact body 1 is box-shaped or round and verclincht at separation points and / or laser welded.
  • An electrical press-fit contact element which is characterized in that the contact body 1 has a free cut on both sides and has a positioning stop 15.
  • An electrical press-fit contact element which is characterized in that side walls of the contact body 1 Eindrückschultern 16 have.
  • An electrical press-fit contact element which is characterized in that the contact elements 14 form inwardly curved contact blades, which are provided with radius-shaped contact points 14 '.
  • An electrical press-fit contact element which is characterized in that the contact element 14 is an insulation displacement terminal, that the contact element 14 is a foil connection and / or that the contact element 14 is a crimp connection.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
EP18150776.5A 2017-01-16 2018-01-09 Élément de contact électrique à enfoncement Active EP3349307B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017100724.5A DE102017100724A1 (de) 2017-01-16 2017-01-16 Elektrisches Einpresskontaktelement

Publications (2)

Publication Number Publication Date
EP3349307A1 true EP3349307A1 (fr) 2018-07-18
EP3349307B1 EP3349307B1 (fr) 2020-03-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP18150776.5A Active EP3349307B1 (fr) 2017-01-16 2018-01-09 Élément de contact électrique à enfoncement

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US (1) US10326223B2 (fr)
EP (1) EP3349307B1 (fr)
DE (1) DE102017100724A1 (fr)

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CN109788643B (zh) * 2017-11-10 2024-07-30 泰连公司 铝基可焊接的触头
KR102178119B1 (ko) * 2018-12-07 2020-11-12 제엠제코(주) 프레스핏 핀, 프레스핏 핀을 포함하는 반도체 패키지 및 프레스핏 핀의 제조방법
DE102019110044A1 (de) * 2019-04-16 2020-10-22 Schaeffler Technologies AG & Co. KG Schalteinrichtung für ein hybrides Antriebssystem eines Kraftfahrzeuges; Antriebssystem sowie Kraftfahrzeug
JP7556697B2 (ja) * 2020-03-31 2024-09-26 株式会社オートネットワーク技術研究所 コネクタ装置の組立部品、及びコネクタ装置
WO2022271665A1 (fr) * 2021-06-21 2022-12-29 Milwaukee Electric Tool Corporation Connecteur électrique à broche de poussée

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US20180205163A1 (en) 2018-07-19
US10326223B2 (en) 2019-06-18
EP3349307B1 (fr) 2020-03-11

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