EP0658955A2 - Filtre plan pour un connecteur à plusieurs pôles - Google Patents

Filtre plan pour un connecteur à plusieurs pôles Download PDF

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Publication number
EP0658955A2
EP0658955A2 EP94119453A EP94119453A EP0658955A2 EP 0658955 A2 EP0658955 A2 EP 0658955A2 EP 94119453 A EP94119453 A EP 94119453A EP 94119453 A EP94119453 A EP 94119453A EP 0658955 A2 EP0658955 A2 EP 0658955A2
Authority
EP
European Patent Office
Prior art keywords
planar filter
contact
ground
pins
openings
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
EP94119453A
Other languages
German (de)
English (en)
Other versions
EP0658955A3 (fr
EP0658955B1 (fr
Inventor
Bob Mouissie
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.)
FILTEC GmbH Filtertechnologie fuer die Elektronikindustrie
Original Assignee
FILTEC GmbH Filtertechnologie fuer die Elektronikindustrie
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 FILTEC GmbH Filtertechnologie fuer die Elektronikindustrie filed Critical FILTEC GmbH Filtertechnologie fuer die Elektronikindustrie
Publication of EP0658955A2 publication Critical patent/EP0658955A2/fr
Publication of EP0658955A3 publication Critical patent/EP0658955A3/fr
Application granted granted Critical
Publication of EP0658955B1 publication Critical patent/EP0658955B1/fr
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
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/719—Structural association with built-in electrical component specially adapted for high frequency, e.g. with filters
    • H01R13/7195—Structural association with built-in electrical component specially adapted for high frequency, e.g. with filters with planar filters with openings for contacts

Definitions

  • the invention relates to a planar filter for connectors with a plurality of signal lines arranged in rows and columns to be connected, with a carrier which has an opening for each of these signal lines and a capacitor in the region of each of these openings with a first covering connected to the associated signal line , has a second covering, connected to ground via the conductive housing, and has a layered dielectric between the first and second covering; it also relates to an application of this planar filter in a connector intended in particular for mounting on printed circuit boards.
  • multi-pole connectors such as those used for the transmission of digital or analog measurement signals from multiple measurement devices or for high-speed transmission of information
  • filtering in order to filter out interfering interference signals.
  • This filtering of interfering interference signals is generally carried out using capacitors, one of which is provided for each line carrying a signal.
  • the capacitors are advantageously combined in planar filters and inserted into the connectors, the planar filters being penetrated by the signal lines, and wherein at least one capacitor is provided for each of the signal lines and the capacitors are arranged on a generally ceramic, in particular aluminum oxide, carrier.
  • Planar filters and seals are used to make a filter connector in the connector housing; the individual capacitors of the planar filter are connected to the connector housing for establishing the ground connection via grounding springs acting on the outer edge of the planar filter and via spring clips for the contact pins to the connecting pins inserted into the lead-through openings for producing the signal line derivatives.
  • grounding springs acting on the outer edge of the planar filter
  • spring clips for the contact pins to the connecting pins inserted into the lead-through openings for producing the signal line derivatives.
  • This structure is intended to ensure that sufficient filtering is achieved with narrow signal lines, which is also dampened by mechanical vibrations.
  • a disadvantage of these arrangements is that they have to be mounted with the plug connector from the start, for which purpose the connection of the signal line to the associated capacitor covering is soldered. However, such a solder connection is not possible if the signal line is formed by pins which are press-fit into a plastic plate.
  • planar filter for connectors which, in the case of narrow signal lines, provides sufficient capacities for the individual capacitors surrounding the signal lines and can be used in the connector without a solder connection, so that it can be used connected with press-fit pins in plastic parts and can also be used in existing plug-in connectors.
  • the connecting pin of the connector which is guided through the insert, is both held and also electrically with the assigned covering the signal electrode of the capacitor.
  • Two mutually opposite edges of the planar filter are designed as conductive side regions connected to its ground electrode; they are connected to general ground via the metallic housing of the connector.
  • connection pins play an important role in limiting the capacitance values: In order to prevent voltage flashovers, the continuous ground electrode ends at a distance in front of the through opening for the connection pin; this creates a ring-shaped area that does not add anything to the capacitance value and that is particularly important for disk-shaped electrodes.
  • the first coverings of the capacitors assigned to the signal electrodes are designed in such a way that they have a double structure in the form of a dumbbell or diabolo with a preferred axis and are nested in one another in such a way that the preferred axes of adjacent capacitors are crossed, the overlap area is with the same space requirement (relatively) enlarged, and with it the capacitance of the capacitors. Since inductance and transit time influences have to be taken into account for the frequencies that are important here, the full available space cannot always be used; here these structures are advantageously designed as double-T, the preferred axis in the middle of the central web connecting the two end webs, in the middle of which the bushing for the associated connecting pin is arranged.
  • each contact insert has a sleeve which is designed as a form-fitting insertable sleeve into the opening for carrying out the connecting pins, which is associated with the first coating of the signal electrode which extends into this opening
  • Capacitor is solderable and electrically connectable by soldering.
  • soldering sleeve The electrical connection to the coating of the signal electrode is made with this soldering sleeve, the outer diameter of which corresponds approximately to the inside diameter of the opening, the soldering sleeve in the opening with the capacitor coating extending into it and leading to the signal electrode in the an embodiment is soldered, which leads to a safe mechanical mounting of the pins in the opening and to their electrically perfect connection to the covering of the associated capacitor, even taking vibrations into account.
  • each pin bushing are part of the planar filter; They are advantageously rolled from a spring-elastic metallic material, for example spring bronze, which can be provided with a noble metal coating to improve contact, and inserted into the through openings of the planar filter in such a way that the connector pins of the connector are inserted through the contact inserts and jammed there .
  • This type of filtering is particularly suitable for connectors in which the connecting pins are pressed into a plastic carrier and, for example, are fixed in the plastic with harpoon-type anchors because of the temperature load during soldering. The clamping results in a good fit and good contact, so that this training can be used at least whenever a limited temperature resistance does not allow soldering.
  • the resilient contact fingers make soldering to the connection pins superfluous, and they do not interfere with the insertion due to dimensional deviations.
  • the resilient contact inserts also make a perfect electrical contact between the connection pins and the associated coatings on the capacitors, so that both influences do not constitute an obstacle to retrofitting.
  • the sleeves can be soldered into the feedthrough openings since the planar filter can withstand thermal loads and is still separated from the connector to be equipped at this stage of manufacture. Despite this soldering of the contact insert into the through opening of the filter carrier, the advantages are retained, since contact fingers interacting with the pins remain unaffected.
  • Each of the contact inserts advantageously has a sleeve, from which conical contact fingers extend in an essentially axial direction.
  • This design achieves a good positive fit in the cylindrical through opening in the carrier of the planar filter.
  • the contact fingers which extend in the axial direction, form a narrowing conical structure through which the connecting pin is guided, which pinches in this structure and thus has a secure fit; the sharp edges of the material also make a safe electrical contact.
  • the contact insert has two contact fingers which cooperate with the connecting pin and which are in contact with one another, particularly for clamping flat connecting pins are arranged opposite each other. With these contact fingers arranged opposite one another, the connecting pin interacts in such a way that it pushes them apart and is held in place by clamping, the clamping forces establishing the contact.
  • three contact fingers are provided for clamping round connecting pins, in particular, which are at an angular distance of 90 ° or 120 ° with respect to the circumferential angle of the sleeve.
  • the contact insert with the three contact fingers has such a design that can still be produced mechanically given the small dimensions of such contact inserts.
  • the contact fingers can be evenly distributed over the circumference of the sleeve, which leads to an angular distance of 120 °.
  • the contact fingers jam with pins with a round diameter, but pins of other cross-sectional shapes can also be jammed, the arrangement of the contact fingers being adapted to the cross-section of the pins if necessary.
  • the contact fingers are not evenly distributed over the circumference, but a gap is formed so that one-sided pressure is exerted on the connecting pin.
  • These arrangements are also used to provide the sleeve with an axial gap, which is arranged on the one hand centrally between two contact fingers, or on the other hand is arranged such that the two adjacent contact fingers are at an angular distance of 90 ° from it and the third, the contact finger is arranged diametrically opposite it.
  • a strip of a resilient, elastic material for example a spring bronze provided with a noble metal coating
  • the spacing of the sleeves corresponds to the spacing of the through openings for the connecting pins which follow at regular intervals and their number corresponds to the number of these through openings
  • the remaining strip of tape forms a transport aid.
  • the contact inserts remain on the band strip, which is divided into sections with one of the required number of contact inserts, they are held in the planar filter and then separated from the band strip. The production takes place in such a way that an endless strip can be processed and the contact inserts are produced in groups.
  • the planar filter which is equipped with such contact inserts, is advantageously arranged on a metallic ground contact plate which has the openings corresponding to the through openings of the ceramic filter carrier, with a larger diameter, in order to prevent undesired contacts between the connecting pins and the ground contact plate lying at ground potential to prevent.
  • the ground contact plate has at least on one of the sides, preferably on two opposite sides of the planar filter, a strip-shaped projection for connection to the contacts connected to ground or to the general ground, the ground connection preferably being made via the plug connector.
  • the protruding edge strip (s) of the metallic carrier is advantageously provided with aligned openings for carrying out the fastening fingers of the metal sheets of the side shields, which are also connected to ground.
  • a preferred application of the planar filter according to the invention is in a connector with a plastic base plate, which is particularly intended for mounting on printed circuit boards and which has lateral, is provided with contact tongues shielding plates, and has the openings for the passage of the signal-carrying connecting pins and the contact tongues of the shielding plates for connecting them to the general ground, with lateral guide fingers extending at right angles to the base plate being formed, which engage the mating connector and lead so that the pins meet the sockets and can be inserted into them, and which are arranged intermittently in sections so that at least between some of the sections cross shields can be used.
  • the side of the base plate facing the printed circuit board has a recess which receives the planar filter, the openings provided in the base plate for the leadthroughs of the connecting pins being widened in a conical manner towards the recess.
  • the protruding edge strip (s) of the ground contact plate is provided with openings which are aligned with these and corresponding holes in the printed circuit board for carrying out the fastening fingers of lateral shields.
  • the strip-shaped edges of the ground contact plate which protrude on both sides of the planar filter are provided with openings for carrying out the fastening fingers of the lateral sheet metal inserts, these fastening fingers serving both for fixing and for connection to a common ground.
  • the contact inserts of the planar filter with the connecting pins and the ground contact plate with the strip-shaped protrusions with the fastening and contact fingers of the side shielding plates act together in a clamping and contacting manner, so that the planar filter is electrically connected to the signal line and ground and the Capacitors act as capacitors located between the signal lines and ground. Furthermore, it is advantageous if the openings provided in the base plate for the passage of the signal pins towards the recess have a conical extension. This design facilitates the insertion of the connector pins (or sockets provided instead of the connector pins).
  • the side strips of the ground contact plate are / are provided with a fold along the edge (s) of the planar filter, in order to determine and adapt to height differences.
  • the planar filter can also be provided with a height compensation below it, in order to be able to compensate for protruding parts of the connecting pins with a larger diameter. Dimensional differences can also be bridged, which plays an important role, especially when retrofitting.
  • FIGS. 1 and 2 show a top view and a side view as well as a perspective schematic view of a planar filter 1 with rows and columns of through openings for connecting pins 11.1 (FIG. 9), the interruptions indicated in both dimensions indicating the representation of the planar filter in FIG. 1 that this can in principle be used for any number of signal connections.
  • the planar filter contains for each of the signal line feedthrough at least one capacitor with two coatings, one of which is connected to the associated signal line and the other, which is generally connected to ground as a common electrode for all or for groups of the capacitors. With this design, this planar filter 1 is suitable to be used as a filter for a number of signal lines which, for example, connect the connections of a printed circuit board 11 (FIG.
  • the counter-coatings of the capacitors of the planar filter 1 are all connected together or in groups and are advantageously led out to two mutually opposite metallized side surfaces 3 and connected to the general ground via a contact; it goes without saying that the ground electrode also applies to everyone four sides of the planar filter 1 can be guided, the geometry of the planar filter, which may be disruptive self-induction, determines the guidance of the ground contacts.
  • FIGS. 3 and 4 show a separate ground contact plate 4 and a planar filter 1 provided with such a ground contact plate 4, in the openings of which contact inserts 5 are used for the passage of the connecting pins.
  • the ground contact plate 4 has for each connecting pin 11.1 (FIG. 9) an opening 4.1, the diameter of which is sufficiently large to prevent contact between the connecting pin and the ground contact plate 4 which is at ground potential.
  • the laterally protruding strips of the ground contact plate 4 are provided here with a fold 4.3, and they also have slot-like openings 4.2, through the fastening fingers 15.1 (FIG. 8) of side shields 15 (FIG. 8) for fastening and for making contact and can be jammed.
  • the planar filter 1 is placed on the ground contact plate 4 in such a way that the axes of the openings 4.1 for the pin bushings are aligned with the contact inserts 5 used in the openings of the planar filter 1 for passing the pins 11.1 (FIG. 9).
  • FIG. 5 shows details of the contact inserts.
  • the perspective view of FIG. 5 reveals the shape of the contact inserts 5.
  • the sleeve 6, intended for approximately form-fitting insertion into the openings for carrying out the connecting pins 11.1 (FIG. 9) in the planar filter 1, is designed as a soldering sleeve; she points for a better positive fit when inserting a slot 6.1, which can also yield resiliently and thus facilitates the insertion.
  • FIG. 6 shows this in a top view and a side view.
  • FIG. 7 shows a planar filter 1 with a layer structure removed from the right to the left, the cover in the right section I, the signal electrodes in the section II adjoining the left, the dielectric in the further section III and finally the continuously formed ground electrode in section IV are.
  • the planar filter 1 is constructed in a layered manner from a carrier 2, on which the ground electrode 2.1 is arranged over the entire area, leaving an annular space around the lead-through openings 1.1 for the connecting pins 11.1 (FIGS. 8, 9), and on which the dielectric 2.2 is arranged it is plotted that it covers the ground electrode 2.1 in the areas of the lead-through openings 11.1, while in the areas of the metallized edges 3 the ground electrode 2.1 is exposed and allows connection to a general ground.
  • the signal electrodes 2.3 are applied in pairs on both sides of each lead-through opening 1.1 and are arranged such that their arms 2.4 running in the direction of the preferred axis are connected to the metallization 1.2 in the lead-through opening 1.1.
  • the planar filter 1 is protected from external influences with the cover 2.5, which leaves the contact surfaces at the edges 3 of the planar filter 1, which form the ground connection, free.
  • the signal electrodes 2.3 shown greatly enlarged in two different shapes in FIGS. 7a and 7b — form double structures with a preferred axis that resemble, for example, a dumbbell or a diabolo.
  • Figure 7a shows such a design, taking into account the annular areas around the pin bushings 1.1, in which the ground electrode 2.1 (FIG. 7) covered by the dielectric 2.2 is cut out and the carrier 2 is partially exposed, and that between the individual signal electrodes 2.3 (only designated in the central region) is necessary for insulation because of different potentials Distance, fills an approximately maximum area.
  • the two, here approximately sheet-shaped electrode surfaces 2.3 are connected to establish the electrical connection with the pin 11.1 (FIGS.
  • FIG. 7b shows a modification of this structure, the signal electrode 2.3 (shown only enlarged in the middle area) of a capacitor in the vicinity of adjacent capacitors having the structure of a double T, which contains the lead-through opening 1.1 for the assigned pin in the middle, which is also shown enlarged.
  • the parts of the structure corresponding to the flanges of a double-T profile form the signal electrode 2.3, which are connected to the metallization 1.2 in the lead-through opening 1.1 via the arms 2.4 running in the direction of the preferred axis. Together with the ground electrode 2.1 (FIG. 7) separated by the dielectric, they form the respective capacitor and determine its capacitance.
  • the arms 2.4 of the structure running in the direction of the preferred axis are brought up to the metallization of the lead-through opening 1.1 for the associated connecting pin and are connected to the latter via a metallization 1.2 extending into this opening.
  • the contact insert 5 is soldered into the connecting pin bushing 1.1, into which the connecting pin 11.1 (see FIGS. 8, 9) is inserted, which is provided by the contact fingers 7 (Fig. 6) of the contact insert 5 clamped and thus both mechanically fixed and electrically connected.
  • This clamping is not a rigid fixation, so that the planar filter 1 is kept free of mechanical stresses by this type of fastening.
  • FIG. 8 shows a possible application example of a connector 10 which is placed on a printed circuit board 11.
  • the connection pins 11.1 (FIG. 9), which are fixed in the printed circuit board 11 approximately by means of a press-fit connection, are connected there to the corresponding conductor tracks and represent the connection points necessary for using the printed circuit board 11, which are connected to further electronic circuits or switching elements connect, the connection should be a detachable. This detachability is achieved with the connector 10, which interacts with a mating connector (not shown in detail).
  • This connector is formed by a base plate 12 made of plastic, which is provided with a number of lead-through openings (not specified) corresponding to the number and arrangement of the connecting pins 11.1.
  • Shaped guide fingers 13 are provided on the side of the base plate 12, which grip the mating connector to be used and guide it so that the connecting pins 11.1 (FIG. 9) meet the sockets of the mating connector and can be inserted into them.
  • the base plate 12 also has a recess 14 on its underside with a height such that the planar filter can be accommodated.
  • the planar filter is provided with a ground contact plate 4 with fastening slots 4.2, via which the ground contact is made either to the printed circuit board 11 or to the mating connector, the ground connection running over the side shields 15 and also being able to be led from the printed circuit board to the mating connector or vice versa.
  • the side shields 15 are provided with fastening tongues 15.1 which are guided through the slot-shaped fastening openings of the ground contact plate 4 and the printed circuit board 11 and are fixed accordingly and of which at least some form contact tongues in order to achieve a secure earth connection to the mating connector.
  • transverse shields 18 Extending at right angles to the side shields 15 are transverse shields 18 which are guided between the pairs of guide fingers 13 and are held by contact lugs 18.1 which are held by slots (not designated in any more detail) in the side shields.
  • the base plate 12 also advantageously has slot-shaped openings between the sections of the connector 10 which are separated from one another by transverse shields 18 and which are also provided at the ends in order to limit the connector 10.
  • the unavoidable projections of the contact fingers 7 of the contact inserts 5 protrude beyond the surface of the planar filter 1 (see FIGS.
  • FIGS. 9a and 9b each show a section through a plug connector 10 according to FIG. 8.
  • the base plate 12 is fastened on the printed circuit board 11, the connecting pins 11.1 being at right angles to the printed circuit board 11 and being guided through the base plate 12 of the plug connector 10; the side shields 15, the side shield 15 'of the end face and the transverse shields 18 form the housing of the connector 10.
  • the base plate 12 is provided with the recess 14, so that the planar filter 1 is accommodated in this recess, the protrusions of the Contact fingers 7 lie in the conical recess 12.1 of the base plate 12.
  • the base plate 12 'shown in FIG. 9b corresponds to the current technology; it has no recess for inserting the planar filter 1.
  • planar filter 1 with the contact inserts 5 is retrofitted and is located on the side of the base plate 12 'facing the mating connector. With this type of use of the planar filter equipped in this way, retrofitting can also be carried out in a simple manner.

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  • Details Of Connecting Devices For Male And Female Coupling (AREA)
EP94119453A 1993-12-11 1994-12-09 Filtre plan pour un connecteur à plusieurs pÔles Expired - Lifetime EP0658955B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4342326A DE4342326C2 (de) 1993-12-11 1993-12-11 Planarfilter für einen vielpoligen Steckverbinder
DE4342326 1993-12-11

Publications (3)

Publication Number Publication Date
EP0658955A2 true EP0658955A2 (fr) 1995-06-21
EP0658955A3 EP0658955A3 (fr) 1997-03-05
EP0658955B1 EP0658955B1 (fr) 1999-08-18

Family

ID=6504779

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94119453A Expired - Lifetime EP0658955B1 (fr) 1993-12-11 1994-12-09 Filtre plan pour un connecteur à plusieurs pÔles

Country Status (4)

Country Link
US (1) US5603640A (fr)
EP (1) EP0658955B1 (fr)
DE (2) DE4342326C2 (fr)
ES (1) ES2136154T3 (fr)

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DE19811536C2 (de) * 1998-03-17 2000-05-18 Filtec Gmbh Filteranordnung für vielpoligen Steckverbinder
US6385315B1 (en) * 1998-06-05 2002-05-07 Mphase Corporation Video voice separation system
US6152780A (en) * 1999-01-04 2000-11-28 Jme Inc. Electrical connector with electrically conductive plates
FR2836293B1 (fr) * 2002-02-19 2004-05-14 Radiall Sa Bloc de connexion apte a etre insere dans une cavite d'un boitier metallique d'un connecteur multicontact
FI20020992L (fi) * 2002-05-27 2003-11-28 Nokia Corp Komponentin kiinnitysrakenne
US7295086B2 (en) * 2002-10-23 2007-11-13 Spectrum Control Inc. Dielectric component array with failsafe link
DE10349301A1 (de) * 2002-10-23 2004-06-03 Spectrum Control Inc. Anordnung dielektrischer Bauteile
US7306490B1 (en) * 2007-04-05 2007-12-11 Delphi Technologies, Inc. High-density pass-through filter apparatus

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US3648222A (en) * 1970-03-16 1972-03-07 Bunker Ramo Electrical connector having laminated contact element
CA1064118A (fr) * 1975-04-28 1979-10-09 Eric E. Vander Heyden Connecteur filtre a plaque de masse composite
US4699590A (en) * 1985-10-31 1987-10-13 Amp Incorporated Modular connector assembly and filtered insert therefor
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Also Published As

Publication number Publication date
DE4342326C2 (de) 1996-12-12
DE59408639D1 (de) 1999-09-23
DE4342326A1 (de) 1995-06-22
US5603640A (en) 1997-02-18
EP0658955A3 (fr) 1997-03-05
ES2136154T3 (es) 1999-11-16
EP0658955B1 (fr) 1999-08-18

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