EP2232649A1 - Blindage emi/rfi pour connecteur electrique - Google Patents

Blindage emi/rfi pour connecteur electrique

Info

Publication number
EP2232649A1
EP2232649A1 EP08866991A EP08866991A EP2232649A1 EP 2232649 A1 EP2232649 A1 EP 2232649A1 EP 08866991 A EP08866991 A EP 08866991A EP 08866991 A EP08866991 A EP 08866991A EP 2232649 A1 EP2232649 A1 EP 2232649A1
Authority
EP
European Patent Office
Prior art keywords
connector
spring
protrusions
counterpart
contact
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.)
Withdrawn
Application number
EP08866991A
Other languages
German (de)
English (en)
Inventor
Jeroen De Bruijn
Gert Droesbeke
Paul Potters
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.)
FCI SA
Original Assignee
FCI SA
Framatome Connectors International SAS
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 FCI SA, Framatome Connectors International SAS filed Critical FCI SA
Publication of EP2232649A1 publication Critical patent/EP2232649A1/fr
Withdrawn legal-status Critical Current

Links

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
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
    • H01R13/6581—Shield structure
    • H01R13/6582—Shield structure with resilient means for engaging mating connector
    • H01R13/6583—Shield structure with resilient means for engaging mating connector with separate conductive resilient members between mating shield members
    • 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
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
    • H01R13/6591—Specific features or arrangements of connection of shield to conductive members
    • H01R13/65912—Specific features or arrangements of connection of shield to conductive members for shielded multiconductor cable

Definitions

  • electrical and/or optical connectors comprise means for providing electromagnetic/radio frequency shielding (EM/RF shielding) to the connection being made by the connector and a counterpart.
  • EM/RF shielding electromagnetic/radio frequency shielding
  • Such shielding relies on sufficient electrical contact of shielding arrangements on both connecting parts with at most small holes, smaller that the shortest wavelength from which shielding is desired.
  • Contact springs which elastically engage both connecting parts have been successfully used for overcoming unparallelism of substantially flat parts.
  • these are generally made of thin sheet- or strip metal which is relatively delicate and relatively sharp.
  • a contact spring may relatively easily be damaged and/or cause damage during handling. Such damage may be e.g. breaking off of a spring finger, or the contact spring cutting or tearing insulating material or wounding an operator.
  • the housing comprises a plurality of protrusions protruding in the mating direction and being arranged for making electrical and/or mechanical contact with the surface of the counterpart, when the connector is mated to a counterpart, and thereby substantially limiting the deflection of at least some of the spring fingers within their elastic deformation range.
  • a connector which allows that, during mating of the connector to a counterpart, the contact spring gets compressed for ensuring proper contact and thus EM/RF shielding.
  • the protrusions block further mating motion of the connector and the counterpart and therewith prevent the spring elements from being bent beyond the point of elastic deformation, which would effectively cause folding or crushing of the spring elements and would reduce their functionality or lead to their breaking off.
  • the contact spring therefore need not be sized for withstanding excessive bending and/or flattening forces.
  • the protrusions further concentrate the mating contact force relative to flat engaging surfaces, thus locally improving the electrical contact between the housing of the connector and the counterpart and therewith improving the shielding function of the connection.
  • the electrical contact of the connecting parts, and thus their shielding, is therefore not dependent on all spring fingers making optimum contact.
  • the contact spring may therefore be relatively weak, which provides that the connector and the counterpart remain in physical contact even if they are not tightly fixed together.
  • the separation between adjacent protrusions is advantageously chosen smaller than an EM/RF noise-frequency cut- off gap, for further improving the shielding arrangement and/or providing redundancy.
  • a relatively reliable shielding arrangement is provided.
  • a connector according to claim 2 assists in preventing damage by or to the spring fingers by cutting or snagging behind objects.
  • the contact spring may be relatively delicate .
  • the protrusions may be relatively robust while still allowing to provide a localised contact force and an adequate shielding of the contact spring.
  • the spring elements may be further protected against excessive bending.
  • At least some of the second protrusions may be sized to limit the deflection of the corresponding spring elements within their elastic deformation range. The second protrusions may serve as back-up, should the first protrusions become damaged or flattened during use.
  • Claim 5 defines a connector which facilitates mounting the contact spring.
  • the first and/or second protrusions may operate as fixation protrusions.
  • a different set of dedicated fixation structures may also be provided.
  • Claims 6 and 7 define connectors adapted for relatively efficient mounting of the contact spring.
  • Claim 9 defines a connector with a an efficient and reliable attachment of the contact spring to the housing, since it also may prevent sharp angles in the transition zone between the post portion and the head portion of the rivet formed by the riveted protrusion.
  • the parts may be manufactured to relatively lower tolerances, and thus be more cost-efficient, since the contact spring may be fit between the protrusions and be allowed to "snake" somewhat between the protrusions, accepting variations in size of positions of the protrusions. Thus, essentially, fitting to only one protrusion at a time has to be considered.
  • the contact spring comprises relative weak points for bending the spring in the plane of the web.
  • the constrictions in the design may also serve for efficiently sizing, e.g. by breaking or tearing, a contact spring provided on a strip. Claim 12 allows the contact spring to be bent in the plane of the contact spring.
  • the spring constant of the spring may be tailored by the relative sizes of the legs and the opening of the V-shape. This holds in particular for a contact spring wherein the spring elements are reverse-bent spring fingers .
  • the contact spring may be made as or from a substantially flat strip of material which is relatively flexible and possibly resilient in all three dimensions with respect to the plane of the strip. This allows relatively course tolerances in the parts.
  • a connector which comprises a conductive housing, substantially surrounding at least one contact terminal and having a front surface substantially perpendicular to a mating direction for mating with a counterpart.
  • a contact spring is attached to the housing and comprises a plurality of elastically deformable spring elements being arranged for making contact with and deflecting against a surface of the counterpart facing the connector front surface when the connector is mated to the counterpart.
  • the housing comprises a plurality of first and second protrusions protruding in the mating direction.
  • the first protrusions are arranged for making contact with, when the connector is mated to a counterpart, the surface of the counterpart and thereby substantially limiting the deflection of at least some of the spring elements within their elastic deformation range.
  • the second protrusions are arranged for substantially defining a maximum deflection of at least some of the spring elements within their elastic deformation range which is further than the deflection defined by the first protrusions.
  • Such a connector provides an EM/RF shielding arrangement for the connection being made, having a contact spring which is substantially mechanically protected. This improves the robustness of the connector. It further protects an operator or delicate parts nearby the connector from being harmed.
  • the contact spring may be manufactured relatively weak, saving manufacturing costs.
  • a connector which comprises a conductive housing, substantially surrounding at least one contact terminal and having a front surface substantially perpendicular to a mating direction for mating with a counterpart.
  • a contact spring is attached to the housing and comprises a plurality of elastically deformable spring elements. At least one of the elements is formed as a generally V-shaped spring finger.
  • a plurality, e.g. all spring elements are thus formed.
  • the spring elements are arranged for making contact with and deflecting against a surface of the counterpart facing the connector front surface when the connector is mated to the counterpart.
  • the housing of the connector comprises a plurality of first and second protrusions protruding in the mating direction.
  • the first protrusions are arranged for making contact with, when the connector is mated to a counterpart, the surface of the counterpart and thereby substantially limiting the deflection of at least some of the spring elements within their elastic deformation range.
  • the second protrusions are sized and arranged for substantially defining a maximum deflection of at least some of the spring elements within their elastic deformation range which is further than the deflection defined by the first protrusions.
  • an EM/RF shielding connector which allows to use a contact spring having a relatively weak spring constant, yet is relatively mechanically robust against sideways forces or torsion.
  • Such connector may provide increased reliability during handling, such as repeated mating and unmating and shipping, while facilitating mating to a counterconnector .
  • Fig. 1 is a perspective view of a connector without a contact spring.
  • Fig. 2 is a perspective view of a connector with a contact spring.
  • Fig. 3A is a plan view of a connector housing without a contact spring.
  • Fig. 3B is a plan view of a connector with a contact spring .
  • Fig. 4 is a side plan view of a connector with a contact spring.
  • Fig. 5 is a perspective view of a detail of a connector with a contact spring, as indicated in the figures 2, 3B and 4.
  • Figs. 6A-6C are different views of the contact spring of Figs. 2, 3B-5.
  • Fig. 7 is a perspective view at an enlarged scale of a different embodiment of a connector housing without a contact spring.
  • Fig. 8 is a plan view of the housing of Fig. 7.
  • Figs. 9A-9C are different views of an alternative contact spring.
  • Fig. 10 is a cross-sectional detail of a contact spring attached to the housing by means of a riveted protrusion.
  • Figs. 1 and 2 show an electrical cable connector 1 comprising a housing 2 and a mating portion 3.
  • the mating portion defines a mating direction, here indicated with an arrow MD.
  • the housing 2 comprises two half-shells 2A and 2B of a conductive material, preferably of made by means of die casting.
  • the housing 2 and the mating portion 3 surround at least one contact terminal for contacting with a wire of a cable (not shown) .
  • the housing 2 has a front surface 4, substantially perpendicular to the mating direction MD.
  • a contact spring 5 is shown attached to the housing 2.
  • Figs. 3A and 3B are plan views in the direction of the mating direction MD of the connector 1 of Figs. 1 and 2, showing the front surfaces 4 without a contact spring (Fig. 4A) and with a contact spring 5 (Fig. 4B) .
  • Fig. 4 is a side plan view of the connector 1 with the contact spring 5.
  • Fig. 5 shows a detail on an enlarged scale of the connector 1 with a contact spring 5, as indicated in Figs. 2, 3B and 4.
  • the housing 2 comprises a plurality of first, outer, protrusions 6 and second, inner, protrusions 7 protruding in the mating direction MD. Additional protrusions 7A are provided at the corners of the housing 2.
  • the protrusions 6, 7, 7A are arranged for making contact with the surface of a counterpart (not shown), when the connector 1 is mated to the counterpart.
  • the contact spring 5 comprises a plurality of elastically deformable spring elements 8 which are arranged for making contact with and deflecting against a surface of a counterpart facing the connector front surface 4 when the connector 1 is mated to the counterpart.
  • the protrusions 6, 7 and 7A are sized, particularly with respect to their height, to substantially limit the deflection of the spring element within its elastic deformation range.
  • the contact spring 5 and the protrusions 6, 7 are arranged along the circumference of the connector housing 2, the protrusions 6 being nearer the circumference, protecting the spring 5 at the outside of the connector 1.
  • the contact spring 5 is divided in two generally U-shaped parts, 5A and 5B, corresponding to the housing comprising two half-shells 2A, 2B. This allows to (dis-) assemble the housing 2 with the contact spring 5 attached thereto.
  • the contact spring parts 5A and 5B are substantially identical to each other, with the exception of their lengths for fitting the respective half- shells 2A, 2B.
  • the connector housing 2 may effectively be made of cast metal or of a plastics material which is rendered conductive by additives or by a conductive coating. Die casting allows to realise a relatively large variety of shapes for the housing 2, including providing details such as the protrusions 6, 7, 7A.
  • the protrusions 6, 7, 7A may have convex ends and may be somewhat deformable for adapting to unparallelism of the mating connector surfaces.
  • the protrusions 6, 7, 7A may thus effectively serve for providing shielding of the connection between the connector 1 and the counterpart against EM/RF noise.
  • the deformation may wear off the protrusions 6, 7, 7A over repeated mating/unmating, especially when a connector 1 is used with different counterparts. This effect may be overcome by clamping the connector 1 against the counterpart, possibly increasingly hard, and/or the use of the contact spring 5.
  • Figs. 6A-6C are different views of the half contact spring 5B of Figs. 2, 3B-5.
  • Figs. 6A and 6B are plan views from above and below of the spring, respectively.
  • Fig. 6C is a detail view on an enlarged scale, as indicated in Fig. 6A.
  • the half springs 5A, 5B is formed from a single piece of material, e.g. by stamping or punching out of a sheet metal blank and bending the spring fingers 8. To facilitate the bending and its regulation for a controlled spring geometry and thus also a controlled spring constant, the spring fingers 8 are provided with incisions 13. The spring fingers 8 are further formed with spring curves 14, to divide internal stress equally inside the spring finger 8. This results in an relatively good relation between spring constant, spring movement and resistance against plastic deformation of the spring element 8.
  • the constrictions 10 and holes 11 fit to the protrusions 6, 7, 7A of the housing 2 for attachment of the spring thereto.
  • the width of the web 9 is chosen such that the spring fits tightly between the protrusions 6, 7.
  • the web 9 may be provided with incisions (indicated with dotted lines 15) adjacent one or more constrictions 10 so as to provide attachment springs for holding the spring 5 against the corresponding protrusions 6, 7.
  • the attachment springs may facilitate pressing the spring 5 over the protrusions 6, 7 but substantially prevent pulling the spring 5 off again.
  • One or more of the protrusions 6, 7, 7A may be riveted for attaching the spring 5 to the housing 2.
  • the height of at least some of the protrusions 6, 7, 7A is such that flattening and folding of the spring fingers 8 due to compression of the connector 1 against the counterpart is substantially prevented.
  • the outer protrusions 6 may be higher than the inner protrusions 7, providing an additional protection to the spring 5 from the outside and reducing the chance of gaps remaining between the connector housing 2 and the front surface of the counterpart.
  • the separation between (the protrusions 12 of) the spring fingers 8 is preferably chosen smaller than the shortest relevant EM/RF-noise wavelength for the connection between the connector 1 and the counterpart. The same holds for (the separation of) the protrusions 6, 7, 7A. Typical separations are approximately 7 mm or below, preferably below approx. 6 mm, typically about 5 mm or 4 mm.
  • Figs. 7 and 8 are different views of an alternative embodiment of a housing 2, which is largely identical to that of Figs 1-5.
  • Figs. 9A-9C are different views of an alternative embodiment of a contact spring 5.
  • Fig. 10 is a detail of yet an alternative contact spring 5. In these figures, elements and aspects which substantially correspond with those of Figs. 1-6C are indicated with the same reference numerals.
  • Fig. 7 is a partial view of a housing 2, which comprises two half-shells 2A, 2B.
  • Fig. 8 is a plan view of the housing 2 of Fig. 7.
  • the housing 2 comprises a plurality of protrusions 6, 7.
  • the protrusions 6 and 7 are arranged along the circumference of the housing 2, the protrusions 6 being arranged essentially at the circumference.
  • the protrusions 6 are elongated in a direction along the circumference.
  • ridges 16 extend, which here interconnect the protrusions 6.
  • the protrusions 6 and the ridges 16 together form a rim 16A around the circumference of the housing 2.
  • the rim 16A is castellated due to the height difference between the protrusions 6 and the ridges 16.
  • the protrusions 7 are surrounded by a groove 17 over their circumference.
  • the protrusions 6 are higher than the protrusions 7, i.e. they protrude further from the front surface 4, such that they are adapted for making contact with, when the connector 1 is mated to a counterpart, the surface of the counterpart, before the protrusions 7 do.
  • the protrusions 6 are adapted for limiting the deflection of the spring element within its elastic deformation range.
  • the protrusions 6 are adapted for making electrical contact with the surface of the counterpart themselves, providing EM/RF shielding and preventing gaps between the connector 1 and the counterpart which may collect dirt etc.
  • Figs. 9A-9C show one part of the contact spring 5 adapted for use with the housing 2 of Figs. 7 and 8.
  • Fig. 9A is a side view
  • Fig. 9B is a perspective view
  • Fig. 9C is a partial view at an enlarged scale.
  • the shown part of the spring 5 is generally U-shaped.
  • 9A-9C comprises a plurality of elastically deformable spring elements in the form of reverse-bent spring fingers 8 connected to an essentially elongated web 9.
  • the spring fingers 8 are V-shaped, having two legs 8A defining an opening 18 in the spring element 8. This may result in a relatively weak spring in the mating direction MD, since the legs 8A may be relatively narrow compared to the entire spring element 8. Yet, at the same time, the spring element 8 is relatively robust against forces substantially perpendicular to the mating direction MD.
  • the tips of the spring fingers 8 are provided with a bent portion forming a protrusion 12 for increasing and localising contact pressure.
  • the spring fingers 8 are provided with incisions 19.
  • the incisions 19 extend into the web 9, forming constrictions as well as allowing the web 9 to bend somewhat in the plane of the web 9.
  • the incisions 19 may also be used for clamping and/or tearing the web 9 to a desired length.
  • the web 9 is provided with holes 11 for attaching the spring 5 to the protrusions 7 of the housing 2.
  • the holes 11 in the web 9 are elongated for allowing relatively large manufacturing tolerances between (the protrusions 7 of) the housing 2 and the spring 5.
  • the web 9 comprises optional bridges 20 between the legs 8A of the spring fingers 8, fortifying the web 9 and the V- shaped spring fingers 8. Without the bridges 20, the contact spring 5 is generally formed as an undulating strip, wherein the holes 18 are fully open cut-outs.
  • the contact spring 5 of Figs. 9A-9C is mounted to the connector housing 2 of Figs. 7, 8 by fitting the holes 11 over the protrusions 7.
  • the spring 5 is attached to the housing 2 by clamping forces between the circumference of the holes 11 to the protrusions 7 and/or riveting of the protrusions 7. Other means of attachment such as screwing or gluing are also conceivable.
  • the protrusions 6 and 7 are arranged staggered with respect to each other, facilitating fitting the spring 5 to the housing with some flexibility to (the positions of) the protrusions. At the same time, the staggered arrangement allows to provide the housing relatively narrow while designing the web 9 with a relatively small and substantially constant net width.
  • the contact spring 5 When mounted to the housing of Figs. 7, 8, the contact spring 5 is partially hidden behind and thus protected to the outside by the castellated rim 16A.
  • the protrusions 6 are arranged at the positions of the spring fingers 8, providing extra, localised, protection. Additional protrusions may be provided for attachment and/or bending protection purposes.
  • the outer protrusions 6 are higher than the inner protrusions 7, providing protection against too far bending, flattening and possibly folding of the contact spring elements 8.
  • the protrusions 7 serve the same purpose at a further degree of bending. Thus the protrusions 7 protect the tips of the spring fingers from too far bending while the protrusions 6 protect the bending portion itself from being bent to a too small bending radius.
  • the protrusion 7 When the protrusion 7 is riveted, the protrusion 7 is deformed to form a rivet post 7A with a rivet "mushroom" head 7B, fixing the web 9.
  • the curved circumference of the hole 11 in the web 9 causes a generally gradual transition of the diameter of the riveted protrusion 7 between the post 7A and the head 7B. This prevents the substantially step-wise increase in diameter between the post 7A and the head 7B of a regular rivet. At such step-wise increase in diameter, stress may focus and build up, allowing the rivet head 7B to break off and the spring 5 to become detached from the housing 2.
  • a concave circumference of a hole in a substrate for at least partially surrounding a rivet thus may result in a relatively strong and reliable attachment. From Fig. 10 it may also be seen that the front surface
  • the spring elements may be bent or oriented outwards instead of inwards, for contacting the front face of the counterpart further outwards. This allows relatively larger tolerances between the connector and (a receiving hole in ) the counterpart .
  • the spring element may be a flexible, reversely bent band, not having separate spring fingers.
  • the spring fingers may also extend from the web without being reverse-bent.
  • the contact spring may be a generally undulating band, e.g. essentially VVV-shaped, with one or more tips or bent out of the plane .
  • Additional protrusions may be provided in the opening of the V-shape of the spring fingers.
  • the protrusions may be angular, e.g. substantially hexagonal, rectangular or square.
  • the connector 1 may be an optical connector, contact terminal of the connector being an optical terminal.
  • the connector may comprise a plurality of mating portions in a single housing, each of these mating portions may be provided and/or surrounded individually by a plurality of protrusions and/or a contact spring.
  • the spring fingers are adapted to make contact with and deflecting against a front surface of the counterpart
  • the present invention can be applied to the case where the spring fingers extend along a parallel direction with the mating direction and contact and deflect against an edge of the counterpart, such as an edge of a front panel cut-out.

Landscapes

  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

L'invention porte sur un connecteur (1) comprenant un logement (2) qui entoure sensiblement au moins une borne de contact et qui possède une surface antérieure (4) sensiblement perpendiculaire à une direction d'accouplement (MD) dans laquelle le connecteur se couple à une contrepartie. Au moins un ressort de contact (5) est attaché au logement, lequel ressort comprend au moins un élément ressort élastiquement déformable (8) qui est agencé pour entrer en contact avec la surface de la contrepartie opposée à la surface antérieure du connecteur et fléchir contre cette dernière lorsque le connecteur est couplé à la contrepartie. Le logement (2) comporte une pluralité de premières protubérances (6) projetées dans la direction d'accouplement et agencées pour entrer en contact avec la surface de la contrepartie lorsque le connecteur est couplé à la contrepartie, et limiter de la sorte sensiblement le fléchissement de l'élément ressort dans sa plage de déformation élastique.
EP08866991A 2008-01-02 2008-12-17 Blindage emi/rfi pour connecteur electrique Withdrawn EP2232649A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IB2008051261 2008-01-02
PCT/EP2008/067801 WO2009083462A1 (fr) 2008-01-02 2008-12-17 Blindage emi/rfi pour connecteur électrique

Publications (1)

Publication Number Publication Date
EP2232649A1 true EP2232649A1 (fr) 2010-09-29

Family

ID=40344457

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08866991A Withdrawn EP2232649A1 (fr) 2008-01-02 2008-12-17 Blindage emi/rfi pour connecteur electrique

Country Status (3)

Country Link
EP (1) EP2232649A1 (fr)
CN (1) CN101960675A (fr)
WO (1) WO2009083462A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113270769A (zh) * 2021-03-02 2021-08-17 上海沈德医疗器械科技有限公司 一种屏蔽簧片和具有该屏蔽簧片的矩形连接器

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7044752B2 (en) * 2002-05-24 2006-05-16 Fci Americas Technology, Inc. Receptacle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009083462A1 *

Also Published As

Publication number Publication date
WO2009083462A1 (fr) 2009-07-09
CN101960675A (zh) 2011-01-26

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