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
  • H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
  • H01R13/405—Securing in non-demountable manner, e.g. moulding, riveting
• • 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
  • H01R13/10—Sockets for co-operation with pins or blades
  • H01R13/11—Resilient sockets
  • H01R13/112—Resilient sockets forked sockets having two legs

Definitions

• the present invention relates to the field of electrical connection and more particularly to electrical connection connectors.
• 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 resiliently close to each other.
• 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.
• spindles cannot be used for applications in which the spindles are more stressed (mechanical, vibratory, thermal stresses, etc.) and in particular in aeronautics where the resistance to these constraints is the subject of standards such as the AKINC 600 standard.
• 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 outwards to have portions of external 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 convergent ends connected to the proximal solid part 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. This therefore conditions the minimum thickness of the printed circuit board.
• An object of the invention is to provide an electrical connector pin ensuring a reliable connection.
• an electrical connector pin comprising a connecting section to the connector and a free end section, the end section having two blades, parallel to one another and spaced from each other, each having two main faces connected to each other by two edges substantially parallel to a longitudinal direction of the spindle and one of which is provided with at least one contact portion which extends in lateral projection with respect to an external surface of the connecting section and which is arranged to bite into a surface against which it is applied, the contact portions extending opposite each other and the blades being elastically deformable between a rest position and a close position in which the contact portions are brought closer to each other.
• the structure of the spindle is relatively simple and the pressure exerted by the contact portions on the surface of the housing intended to receive the spindle can be adjusted by varying the distance separating the two edges of the blade and / or the choice of the material.
• This structure also makes it possible to have a relatively short end section and therefore capable of being used with holes of relatively short length (in particular compared to current solutions of the “PRESS-FIT” type).
• the end section has a flat cross section and is provided with a slot extending through the end section in its thickness and extending along a length of the free end section to form the two blades, the two blades each having a first rectilinear edge bordering the slot and a second edge which extends opposite the slot and in lateral projection from which extends the contact portion, the blades being elastically deformable transversely by varying the width of the slot.
• the blades are offset from each other in a direction perpendicular to the main faces by a distance greater than a thickness of the blades.
• the invention also relates to an electronic device and a connector implementing such pins.
• 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 a printed circuit board having metallized holes receiving pins of a connector 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.
• FIG. 5 is an end view (free end side) of a spindle according to a variant of embodiment, the blades being in a rest position;
• FIG. 6 is a view similar to Figure 5 of the spindle according to this embodiment, the blades being in a close position.
• PCB printed circuit board
• 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 electrically conductive internal coating 5 and connected to one of the electrically conductive tracks 3.
• PCB printed circuit board
• two series of holes 4.1 are blind and extend coaxially to each other from faces 2.1, 2.2 of the substrate 2 opposite one another.
• 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 min and the holes 4.1 a depth of about 1.4 mm.
• 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 electric cables 13 is produced in a manner known per se, for example by soldering.
• 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 mm with a finish known as “flash Nickel” over a thickness of approximately 0.3 to 1.0 mm.
• flash Nickel a finish known as “flash Nickel” over a thickness of approximately 0.3 to 1.0 mm.
• Each pin 12 is manufactured by cutting a sheet of metal indicated.
• Other electrically conductive materials, in particular metals and alloys, are obviously possible.
• Pin 12 has a flat elongated shape.
• flat is meant that the pin 12 has a thickness less than its width measured perpendicular to its longitudinal direction.
• the pin 12 here has a rectangular section.
• the end section 12.2 is provided with a slot 14 passing through the end section in its thickness and extending over a length of the end section 12.2 to form two blades 15.
• the blades 15 are parallel to each other and each have two main faces which are parallel to each other (one of which is visible flat in Figure 1) and which are connected to each other by a first straight edge 15.1 bordering the slot 14 and a second edge
• the blades 15 are elastically deformable transversely by varying the width of the slot, that is to say that the blades 15 can be brought close to one another and return elastically to a rest position in which they are parallel to each other.
• the end section 12.2 is made of a material such that, when the blades have been brought close to each other until they touch, the elastic limit of the material is not reached, it that is to say that, when the approximation effort has ceased, the blades 15 can return elastically to their rest position.
• the second edge 15.2 is provided with a contact portion 16 which extends in lateral projection with respect to an external surface of the connecting section 12.1 and which is arranged to bite the surface against which is applied.
• the contact portions 16 here have substantially the shape of a triangle having a sharp apex for biting into the surface of the internal coating 5 against which they are applied. When the blades 15 are in the rest position, the tops of the contact portions 16 are spaced apart by a distance greater than the diameter of the holes 4.1, 4.2.
• the contact portions 16 are arranged on an end portion 12.3 of the end section 12.2.
• the end portion 12.3 is here bevelled to facilitate the introduction of the end section 12.2 into the hole 4.1, 4.2 which it is intended to occupy .
• the end portion 12 3 can be 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, the transverse deformation of the elastic blades 15 is caused, this deformation being carried out gradually due to the shape of the end portion 15.3 (the bevels also facilitate centering of the spindle in the hole). It will be noted that the force necessary for the deformation of the blades 15 depends in particular on the length of the slot 14. Thus, the length of the slot 14 will be determined as a function of The desired insertion force and the desired pressure for applying the contact portions 16 against the internal coating 5.
• the end sections 12.2 of the pins 12 are each received in a hole 4.1, 4.2 and the blades 15 remain elastically deformed in such a way that the contact portions 16 are elastically applied against the electrically conductive coating 5.
• the end section (12.2) is made of a material such that, when the blades (15) are pressed against each other, the elastic limit of the material is not reached.
• blind holes 4.1 and relatively short pins 12 makes it possible to maximize the high frequency bandwidths by minimizing the "stub" effect of the metallized holes on the lines adapted to the high frequencies.
• the pin 12 ' has blades 15' which are offset with respect to each other in a direction perpendicular to the main faces of the blades by a distance greater than a thickness blades.
• 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 it gives it sufficient rigidity (buckling resistance) to allow the engagement of the end section in the metallized hole and by tubular, circular, square example;
• 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 contact portions can have a rounded shape (circular or elliptical) from the moment they have at least one edge allowing them to bite into the surface against which they are applied or the like;
• the contact portions may extend over all or part of the length of the end section
• the contact portions can be arranged set back from the end part of the end section;
• edges 15.1 ' may extend in the same plane or not when the blades are in their rest position (in this second case, the blades may overlap slightly or on the contrary be separated by a groove as shown in Figures 5 and 6);
• the slot can extend up to the connecting section, or even extend into the connecting section;
• the end section can be attached to the connecting section, in particular by welding or brazing ...

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

Applications Claiming Priority (2)

Publications (2)

Family

ID=65861345

Family Applications (1)

Country Status (5)

Family Cites Families (16)

• 2018
  • 2018-09-14 FR FR1858313A patent/FR3086109B1/fr active Active
• 2019
  • 2019-09-13 EP EP19769153.8A patent/EP3850711B1/de active Active
  • 2019-09-13 US US17/273,859 patent/US11469529B2/en active Active
  • 2019-09-13 CN CN201980057760.7A patent/CN112640219B/zh active Active
  • 2019-09-13 WO PCT/EP2019/074592 patent/WO2020053438A1/fr unknown

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