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
  • 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
  • H01R12/70—Coupling devices
  • H01R12/71—Coupling devices for rigid printing circuits or like structures
  • H01R12/712—Coupling devices for rigid printing circuits or like structures co-operating with the surface of the printed circuit or with a coupling device exclusively provided on the surface of the printed circuit
• • 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
  • H01R12/70—Coupling devices
  • H01R12/71—Coupling devices for rigid printing circuits or like structures
  • H01R12/75—Coupling devices for rigid printing circuits or like structures connecting to cables except for flat or ribbon cables
• • 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
  • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
  • H01R13/646—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00 specially adapted for high-frequency, e.g. structures providing an impedance match or phase match
  • H01R13/6473—Impedance matching

Definitions

• a spindle is generally made of conductive metal and comprises an elastically deformable end section in a direction transverse to a longitudinal direction of the spindle so that the end section has two outer surface portions, diametrically opposite one to the other. the other, which are likely to be elastic ent close together.
• the end section can thus be forcibly engaged in the metallized hole and the elasticity ensures permanent contact between the conductive coating of the metallized hole and the outer surface portions of the end section of the spindle.
• connectors of the “PRESS-FIT” type comprising pins whose end section has a shape called “needle cat”, that is to say that the end section comprises, between a proximal solid part and a distal solid part, an intermediate part comprising two blades arched outward to have portions of outer surface spaced from each other by a distance greater than the greatest transverse dimension from the rest of the end section.
• the blades have first converging ends connected to the proximal solid portion and second convergent ends connected to the distal solid part, the outer surface portions ensuring contact with the metallized hole located on an intermediate part of the blades which is curved.
• the metallized hole must have a sufficient length to accommodate the distal part and the intermediate part of the end section of the spindle, ensuring that the portions of the outer surface in contact with the electrically conductive coating. of the metallized hole are sufficiently engaged in the metallized hole so as not to risk being extracted therefrom under the effect of the stresses applied to the connector and / or to the printed circuit board.
• the point of contact of the outer surface portions of the spindle with the electrically conductive coating of the metallized hole must be at a minimum depth of 0.3 mm relative to the entry of the metallized hole.
• the pins of the current connectors generate a break in iterative impedance, or "stub effect", in the adapted lines (therefore with iterative impedance).
• An object of the invention is to provide an electrical connector pin ensuring a reliable connection.
• a high-frequency electronic device comprising: a printed circuit board having conductive tracks and at least a first series of blind holes which extend from a first face of the board and which are each provided with an electrically conductive coating connected to at least one of the conductive tracks; and at least one connector which extends on the side of the first face and which comprises a base and pins having a connection section to the base and a free end section.
• the end section has a cross section having at least one portion curved around an axis parallel to a longitudinal direction of the end section and the end section having side edges which are provided with electrical contact portions and which can be brought closer to each other by causing an elastic deformation of the curved portion, the end sections of the pins being each received in one of the holes of the first series of blind holes and the curved portion being elastically deformed such so that the contact portions are resiliently applied against the electrically conductive coating.
• the structure of the pins is relatively simple and the pressure exerted by the contact portions on the surface of the covering of the hole intended to receive the pin can be adjusted by varying the curvature of the curved portion, the thickness of the end section and / or the choice of material.
• This shape allows the pin to be sufficiently rigid when it is introduced into the hole but also in use once connected while ensuring reliable electrical contact.
• This structure also makes it possible to have a relatively short end section which can be accommodated in blind holes and more generally in holes of relatively short length (in particular compared to current solutions of the “PRESS-FIT” type). In the high-frequency electronic device, the effects of stub will be limited.
• each of the blind holes interconnects two conductive tracks forming a differential line.
• the cross section comprises two portions curved around an axis parallel to a longitudinal direction of the end section, the two portions being reversed with respect to each other, the cross section preferably being substantially in the form of Flattened.
• the end section includes a bevelled and / or rounded end portion.
• the plate comprises a second series of blind holes extending opposite the first series of blind holes.
• the end sections of the pins are driven into the holes of a length between 0.3 mm and 1.4 mm, preferably about 0.85 mm; - the blind holes have a length of between 1.4 mm and 1.6 mm;
• the holes in each series are spaced about 2.54 mm apart.
• FIG. 1 is an elevation view of a spindle according to the invention
• FIG. 2 is a sectional view of a connector according to the invention.
• FIG. 3 is a partial view, in cross section, of an electronic device according to the invention.
• FIG. 4 is a cross-sectional view, on the line IV-IV of FIG. 1, of the spindle of the invention
• Figure 5 is a partial view similar to Figure 1 of a spindle according to an alternative embodiment.
• the invention is here described in application to an electronic device comprising a printed circuit board (or PCB), generally designated at 1, comprising an electrically insulating substrate 2 which carries electrically conductive tracks 3 and which is provided with holes 4.1, 4.2 each covered by an internal coating 5 connected to one of the electrically conductive tracks 3.
• the conductive tracks 3 are connected to high frequency electronic components not shown and form a high frequency circuit.
• first series of blind holes 4.1 there is a first series of blind holes 4.1 and a second series of blind holes 4.1 which extend vis-à-vis from faces 2.1, 2.2 of the substrate 2 opposite to each other.
• the blind holes 4.1 of each pair of facing holes are coaxial with one another and have their ends separated by a distance of approximately 0.4 mm.
• Each of the blind holes 4.1 connects two conductive tracks forming a differential line.
• the other holes 4.2 pass through to lead to the two faces 2.1, 2.2.
• the substrate here has a thickness of 3.2 mm and the holes 4.1 a depth of about 1.4 mm.
• the holes 4.1, 4.2 of each series are spaced from each other by a distance of 2.54 mm approximately.
• the device comprises connectors 10 comprising a base 11 to which are fixed pins generally designated at 12.
• Each pin 12 has:
• connection of the connecting sections 12.1 to the base 11 is carried out in a manner known per se, for example by overmolding.
• the electrical connection of each connecting section 12.1 to the electrical cables 13 is carried out in a manner known per se, for example by soldering.
• the connecting section 12.1 and the end section 12.2 are here made of a single piece of metal.
• the metal used here is one of the following alloys: CuSn4, CuSn6, CuNiSi, CuCrAgFeTiSi.
• Each pin 12 is manufactured by cutting a sheet of metal indicated. A surface treatment is provided by depositing a layer of nickel with a thickness of approximately 1.5 mpi with a finish known as “flash nickel” over a thickness of 0.3 to 1.0 p approximately.
• flash nickel a finish known as “flash nickel”
• Other electrically conductive materials, in particular metals and alloys, are obviously possible.
• Pin 12 has a flat elongated shape.
• flat is meant that the spindle 12 has a thickness less than its width measured perpendicular to its longitudinal direction.
• the end section 12.2 of the spindle 12 is produced from a blade of initially rectangular cross section which has been deformed to finally have a wavy shape here.
• the cross section has two curved portions 14, 15 around an axis parallel to a longitudinal direction of the end section 12.2.
• the two curved portions 14, 15 are inverted with respect to each other and the cross section is substantially in the form of a flattened S.
• the end section 12.2 thus has lateral edges forming electrical contact portions which can be brought closer to one another by causing elastic deformation of the curved portions 14, 15.
• the end section comprises an end portion 12.3 which is here bevelled.
• the terminal part 12.3 is rounded.
• the connectors are mounted on the electronic card 1 by engaging the end sections 12.2 in the holes 4.1, 4.2. In doing so, it causes the transverse deformation of the end sections 12.2, which causes the approximation of the lateral edges 16. This deformation results in an accentuation of the curvature of the curved portions 14, 15. This deformation is achieved gradually due to the shape of the end portion 15.3, the bevels also facilitating the centering of the spindle in the hole. It will be noted that the force necessary for the deformation of the curved portions 14, 15 depends in particular on the thickness of the blade forming the end section 12.2 and on the initial curvature of the curved portions 14, 15.
• said thickness will be determined and the initial curvature as a function of the desired insertion force and the desired pressure for applying the lateral edges 16 against the internal coating 5.
• the end sections of the pins are driven into the holes with a length between 0.3 mm and 1.4 mm, preferably about 0.85 mm.
• the end sections 12.2 of the pins 12 are each received in a hole 4.1, 4.2 and remain elastically deformed transversely so that the lateral edges 16 are elastically applied over their entire length against the electrically conductive coating 5.
• the fact that the lateral edges 16 of the end section are in contact over their entire length with the internal coating of the hole limits the risk of an excessively localized stress concentration which could lead to deterioration of the coating.
• blind holes 4.1 and relatively short pins 12 makes it possible to maximize the high frequency bandwidths by minimization of the "stub" effect of metallized holes on lines adapted to high frequencies.
• the lateral edges 16 are each provided with a contact portion 17 projecting from the rest of the lateral edge concerned.
• the contact portions 17 are here of triangular shape and are located in the end portion 12.3, the bevels extending in the extension of a front surface of the contact portions.
• the electronic device can have any structure and in particular: with a number of holes different from that shown, with only blind or through holes, without facing holes only, with a multilayer or single layer PCB.
• the substrate may have a different thickness and the holes may have a different depth.
• the technology for mounting the components on the printed circuit board is arbitrary.
• the connector may have a different structure from that described.
• the connector can comply with the ARINC 600 standard or not, be a serial connector or a parallel connector, or generally any pin connector ...
• the pins may have a structure different from that described, in particular:
• the connecting section can have any section (for example not flat) from the moment that this gives it sufficient rigidity (buckling resistance) to allow the engagement of the end section in the hole metallized and for example tubular, circular, square;
• the end section may have rounded edges (around an axis parallel to the longitudinal direction of the end section) or planes;
• the end section may have a pointed end to facilitate its introduction into the hole.
• a beveled end truncated point shape
• the centering function does not then result in a significant increase in the length of the end section;
• the lateral edges can comprise projecting contact portions, these contact portions can have a triangular or rounded shape (circular or ellipse) or the like;
• the contact portions can have a rounded (circular or elliptical) or other shape
• the contact portions can extend over all or part of the length of the end section
• the contact portions may or may not be arranged to penetrate locally into the electrically conductive coating of the hole in which the pin is received, the contact portions may thus comprise a projecting tooth to bite the coating and improve the retention of the section of end in the hole;
• the end section can be attached to the connecting section, in particular by welding or brazing; the cross section of the end section may have one or more curved portions.

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• Coupling Device And Connection With Printed Circuit (AREA)
• Multi-Conductor Connections (AREA)

Applications Claiming Priority (2)

Publications (2)

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Family Applications (1)

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Family Cites Families (14)

• 2018
  • 2018-09-14 FR FR1858314A patent/FR3086110B1/fr active Active
• 2019
  • 2019-09-13 CN CN201980057774.9A patent/CN112640220A/zh active Pending
  • 2019-09-13 WO PCT/EP2019/074589 patent/WO2020053437A1/fr active Search and Examination
  • 2019-09-13 EP EP19769152.0A patent/EP3850710B1/de active Active
  • 2019-09-13 US US17/275,898 patent/US11355873B2/en active Active

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