EP0674363B1 - Connector with a plurality of terminals and filter arrangement - Google Patents

Description

The invention relates to a multi-pin connector with a connector housing provided with plastic inserts, in which at least one row of plug pins / sockets and at least one in addition to such a row provided filter arrangement with one of the Number of signal lines to be connected corresponding number of capacitors arranged on a carrier are provided, wherein each of the connector pins / sockets one by one first, with the plug / socket of the assigned signal line connected covering, a second, connectable to ground led out at least one side of the filter arrangement and with the housing of the connector connected covering, and a dielectric Layer formed between the first and the second covering Capacitor is associated with each of the adjacent connector pins / sockets with one with the assigned connection point of the Capacitor connected via pins or lugs is provided (GB-A-2086151).

For multi-pin connectors, such as those used for the transmission of digital or analog measuring signals from multiple measuring devices or used for high-speed transmission of information there is a need for filtering in order to interleave Filter out interference signals. This filtering out of interspersed Interference signals generally take place with capacitors, one of which one for each line carrying a signal is provided. To the capacitors are advantageously combined in planar filters and inserted into the connector, the planar filter from the Signal lines are interspersed, and being for each of the signal lines at least one capacitor is provided and the capacitors on a generally ceramic, especially aluminum oxide Carriers are arranged. The individual signal lines of pins pressed into plastic parts (press-fit connections) formed, the soldering of these pins with the in the Carrying out the covering of the signal electrodes. Such Connectors are for example in US Pat. No. 3,447,104 the EU 0 398 807 A2 described. There are planar filters in these connectors used, which is usually on an alumina substrate are applied by screen printing, the one of dielectric layer separated electrodes on the one hand as a continuous Ground electrode and other than in the number of the number the plug or socket of the connector corresponding discrete, electrodes insulated from each other are printed. This Due to their design, planar filters have a very low self-inductance, so that their resonance shifted towards high frequencies is what the application of this technology for fast signal transmission favored.

These planar filters are provided with openings through which the plug pins or the socket are guided, the covering of the associated capacitor advantageously into the opening is where the electrical connection to the pin or socket is made by soldering. In some cases, however, prohibits the geometry that the planar filters are perpendicular to the connector pins or sockets are used. A multi-pin connector with a connector housing provided with plastic inserts, in which at least one row of plug pins / sockets and at least one filter arrangement provided next to such a row with one of the number of signal lines to be connected corresponding number of capacitors arranged on a carrier GB-A-2 086 151 describes this The connector is a capacitor for each connector pin / socket assigned by a first, with the plug / socket the associated signal line connected to a second, with Ground connectable, led out to at least one side of the filter arrangement and connected to the housing of the connector Covering. and a dielectric layer between the first and the second covering is formed. Each of the adjacent connector pins / sockets with one with the assigned connection point of the Provide the capacitor via conductors or pins connected to contact pins. This arrangement allows only a limited packing density limited dielectric strength.

This is where the invention comes in which overcomes this disadvantage and which the application of the filtering at high signal transmission rate more advantageous planar filter technology even in tight conditions should allow against peak voltages, the installation of the planar filter should be simple and economical.

This object is achieved according to the invention by the in the characteristics of Main features mentioned solved; advantageous further training and preferred embodiments describe the subclaims.

By arranging the planar filter (s) upright next to a row the connector pins or sockets is achieved at normal distances the rows of plug pins and sockets in connectors the planar filter to suppress interference between this can be accommodated. The embodiment shows of the planar filter for a narrow assembly advantageous on one Side two rows of contact surfaces that are spaced apart in each case close to one of the edges, advantageously the longitudinal edges, run, these alternating the even and the odd Capacitors are assigned so that the even number Capacitors associated contact areas, for example, along the lower and those assigned to the odd-numbered capacitors Contact areas lie along the top edge of the planar filter. Is the planar filter with capacitors on both sides are natural the corresponding rows of contact surfaces on both sides available.

This arrangement can be such that each of the planar filters between two rows of pins or sockets or next to two such rows are arranged. The planar filter points capacitors at least on one side, advantageously also on both sides, whose connections are led out to the contact surfaces, wherein each of the plug pins or sockets with the assigned Capacitor over its contact surface by conductor or Contact flags is connected, which is a metallic connection produce and the advantageously resilient, either at the Contact surfaces or on the plug pin or the socket issue.

A particularly space-saving arrangement is then achieved if the planar filter is provided with capacitors on both sides, so that each adjacent row of pins or sockets short way to be connected to the contact surfaces of the planar filter can. This arrangement also allows all of the capacitors the planar filter as a series connection of two capacitors, so the withstand voltage through this series connection is increased.

On a support, generally one aluminum oxide plate, the screen printing technology with the Printed mass to be connected electrode, the flat (almost) covers the entire carrier. On this ground electrode is a dielectric layer, generally of high dielectric masses, applied, and then those connected to the sockets Single electrodes as signal electrodes. An alternative version is given in this case by the fact that a metallic Carrier is used, which forms the ground electrode and the like also the applied mass electrodes of those previously described Embodiment- has a good shielding effect. On this metallic substrates are applied to both sides of dielectric layers, which in turn are to be connected to the sockets Individual electrodes are provided. A protective cover protects both Embodiments of the arrangement from environmental influences and mechanical Attacks.

This arrangement also allows the formation of a connector Filter if there are more than two rows of plug pins or sockets are provided, which may with an odd number of Rows a planar filter is used for the rest of the row. The for effective filtering necessary ground connection is over the in As a rule, common ground electrode is produced for all the capacitors, this ground electrode on at least one of the side areas of the planar filter is brought out and there with the housing of the connector is conductively connected. The planar filter is arranged so that one of the side pairs of the rectangular Planar filters, preferably the narrow sides, parallel to the connector pins or sockets is aligned. It will be advantageous Ground electrode led out on the long side: this allows reduce the self-induction of the ground connection.

In another, in a confined space between the rows of connector pins preferred embodiment is a Planar filters arranged next to the rows of plug pins or sockets. The planar filter points here - just like in the previously described Use case- several rows of capacitors, their Number of rows of connector pins assigned to the planar filter or sockets. Because of this in alignment of the planar filter rows of capacitors one below the other are the connecting conductors to the plug pins or sockets different levels. The planar filter is the same as in the previous one described application example - aligned so that one of the page pairs the rectangular planar filter, preferably the narrow sides, aligned parallel to the plug pins or sockets is.

In this application, the planar filter is regularly outside the rows of plug pins or sockets and directly on the wall of the plug housing. It goes without saying it goes without saying that a mixed application is possible with the planar filter between two rows of plug pins or sockets and a planar filter is arranged outside the rows, the two rows of plug pins adjacent to the planar filter (s) or sockets are connected to it.

To the electrical connection of the plug pins or sockets to manufacture the respectively assigned capacitors, it is sufficient if the contact areas are exposed so that the spring tongues lie against them can, the elastic properties of the material of the spring tongue ensure the necessary contact pressure. Because the connector pins or sockets usually made of resilient material are, it is advantageous if the spring tongues of the connecting Conductor formed from the side wall of the plug or socket are. According to a further development, the flexible tongues are preferred acute angle against the contact points of the planar filter guided.

An alternative embodiment, particularly in double row Arrangement of contact areas on one side of the planar filter is applicable. has contact lugs on the contact surfaces that are on metallic connection surfaces of the assigned connector pins or Sockets are in contact and so the contact between them and the produce the assigned capacitors. These contact flags can be soldered or in corresponding holes in the carrier of the planar filter can be used, it being it goes without saying that the ground electrode is around these holes must be excepted around in order to make improper contact with Prevent mass. Are the capacitor electrodes that match the Plug pins or sockets are connected on both sides of the planar filter arranged, the metallic coated are also here Capacitor pads are designed so that impermissible contacts are prevented. This training of the metallic pads is at the screen printing technology used for the production of such structures to realize in a simple way. This connection technique compared to the connection technology for outside the connector pin planar filters arranged in rows or sockets have the advantage that longer contact flags are avoided and so self-induction is also kept small on the signal side.

The interior of the connector housing is in a manner known per se filled with plastic inserts, these in the area of the spring tongues have longitudinal recesses. With these recesses the mobility of the spring tongues will be preserved can resiliently contact the contact surfaces.

In another training, the connecting conductors are contact pins educated. These contact pins connect the connector pins or sockets with the contact surfaces of the respectively assigned Capacitor of the planar filter. These contact pins are advantageous with the plug pins or sockets in a conductive connection and are connected to the contact surfaces of the planar filter. They are preferably made of a resilient material and are generally perpendicular to the connector pins or sockets. In an advantageous embodiment, the Contact pins are soldered to the planar filter. In another embodiment, in which the planar filters are provided with through openings The contact pins are used in the planar filter provided openings provided, preferably soldered.

In order to suppress leakage currents and to prevent flashovers, the interior of the connector housing is known per se Filled with insulating plastic inserts. These deposits made of plastic form a stacked layer formed from several layers, wherein at least one of the layers is trough-shaped, towards the openings leading for the implementation of plug pins or sockets Have recesses for receiving the contact pins. This are formed as flat metal strips that are groove-shaped in these Recesses are inserted so that they are in the Provided for the shafts of the plug pins or the sockets Through openings protrude and when inserting the connector pins or sockets are turned over and so metallic by squeezing be brought into contact with them.

Are one on the side next to the rows of connector pins or Plugs arranged planar filter two rows of connector pins or sockets, it is advantageous if the contact pins run in different levels, so that the one Row in one level, the other row in a second level are arranged. For this purpose, two of the layers of the stacking layer then point trough-shaped recesses, these up to the assigned Feed-through openings for the plug pins or sockets are.

Fig. 01:

Aufsicht auf einen Steckverbinder mit zwei Reihen von Steckbuchsen und dazwischen angeordnetem Planarfilter;

Fig. 02:

Querschnitt durch den Steckverbinder nach Figur 1;

Fig. 03:

Querschnitt durch einen Steckverbinder mit vier Reihen von Steckbuchsen;
Fig. 3a: Querschnitt durch Steckverbinder, alternative Ausführungsform;

Fig. 04:

Aufsicht auf den Steckverbinder nach Fig. 1, mit Schnittlinie, Aufsicht;

Fig. 05:

Steckverbinder, geschnitten gemäß Fig. 4;

Fig. 06:

Planarfilter, schematische Seit-Ansicht,
Fig. 6a: Ausführungsform mit isolierendem Träger, Querschnitt;
Fig. 6b: Ausführungsform mit metallischem Träger, Querschnitt.

The essence of the invention is explained in more detail with reference to the exemplary embodiments illustrated in FIGS. 1 to 6; show

Fig. 01:

Top view of a connector with two rows of sockets and a planar filter arranged between them;

Fig. 02:

Cross section through the connector of Figure 1;

Fig. 03:

Cross section through a connector with four rows of sockets;
Fig. 3a: cross section through connector, alternative embodiment;

Fig. 04:

Top view of the connector of Figure 1, with section line, supervision.

Fig. 05:

Connector cut according to FIG. 4;

Fig. 06:

Planar filter, schematic side view,
6a: embodiment with insulating support, cross section;
Fig. 6b: embodiment with a metallic support, cross section.

Figure 1 shows a plan view of the connector 1 with the housing 2 and the sockets 13, which are arranged here in two rows are. Between the two rows of the sockets 13 is a planar filter 16 used, the narrow sides of which are inserted into clamping rails 5 are. The narrow sides provided with the ground contacts 16.1 of the planar filter 16 are mechanical of the clamping rails 5 on the one hand held, and on the other hand they are on the clamping rails 5th led out and electrically with the ground potential Connector housing 2 connected. The sockets 13 are in the Housing with anchor lugs 14, the recesses in the wall behind of the housing 2, set. The outward facing serve Anchor lugs 14 as holders. The anchor flags pointing inwards 15 rest on the contact surfaces of the planar filter 16 and make so the electrical contact to the capacitors of the planar filter 16 forth, since the planar filter 16 in the clamping rails 5 is set, also contribute to the fixation of the socket.

Figure 2 is a section along the section line II-II (Fig. 1) and shows these conditions clearly: The in the housing 2 of the Connector 1 inserted sockets 13 have outward spread Anchor lugs 14, which engage behind recesses 2.1 and so secure the inserted sockets 13. The inside Spread anchor tabs 15 lie on the contact surfaces 16.2 of the Planar filter 16 on, which creates the conductive connection to the capacitors of the planar filter 16 is produced. Because the planar filter is produced in thick-film technology and on a carrier 17, which is generally formed from aluminum oxide (or a metallic Carrier 18), exists on the usually in the screen printing process conductive layers 17.1 and 17.2, between which to form the capacitors have at least one dielectric layer 17.3 is provided, are applied, the layer structure with a Protective cover 17.4 is insulated, there is the possibility these conductive layers 17.1 and forming the capacitors 17.2 to provide on both sides of the carrier 17 and the connections to keep clear of the insulating cover 17.4 to form the Contact areas 16.2. The connector 1 is by an injection molding one-piece molded or subsequently inserted plastic piece 2.2 (which is not shown in FIG. 1) closed, to suppress leakage currents with conical recesses 7 is provided, in which the cone-like lugs 8 of the mating connector intervene and thus increase the length of the creepage distance. This insert is further molded with a one-piece or used strip-like shaping 2.3, which the Holds planar filter 16 in position.

FIG. 3 shows a section through a plug connector 1 as an adapter connector with four rows of connector pins 12, which corresponds to the section of Figure 2. Here is the case 2 of the connector 1 formed from sheet metal, with plastic inserts 6 fill the inside of the housing 2. With the planar filters used here 16, the long sides are provided with the ground contacts 16.1. These long sides are held by clamping rails 5, which are metallic are connected to the housing 2 of the connector 1 and over which the electrical ground connection runs. To accommodate the the conductive connections between the connector pins 12 and the Sockets 13 with the contact surfaces 16.2 and 16.3 of the planar filter 16 have these plastic inserts 6 as guide channels channels 9 in which the contact webs 10 are inserted. These are in the Area of the plug pin / socket feed-through inside and are flipped over when inserting this plug / socket combination. Since the through openings in the plastic inserts 6 are made to measure for the plug / socket combination the folded parts of the contact webs 10 against the exterior of the connector pin / socket combination pressed so that contacting is flawless is. The end (s) assigned to the planar filter (s) of the contact web (s) are in contact with the contact surfaces of the planar filter 16 in conductive connection. Here, planar filters are advantageous 16 used in the usual design for each of the capacitors have a lead-through opening 16.3, whereby it differs from understands that the capacitors are arranged on both sides can, either to increase capacity or to enlarge the dielectric strength. Because of the through openings 16.3 each of the capacitors can be reached, the Ends of the contact webs 10 advantageously in the through openings 16.3 of the planar filter 16 are soldered. The contact webs 10 cranked so that an existing difference in dimension between the parting plane of the plastic inserts 6 with the guide channels 6.1 or the guide channels with a compact plastic block and the in bridging the through openings provided to the planar filters 16 , it also goes without saying that instead of the stack layer the plastic inserts 6 used a compact block can be in which the lead-through channels 6.1 for the contact webs are drilled in, which are then advantageous as in the area of these feed-through channels round pins are formed while in each Feed-through channel for the male / female combination Part of the contact web 10 is flattened. The one shown in FIG. 3a Embodiment that the representation of the connector in Figure 3 corresponds to two planar filters 16 'are used here are arranged between the two pairs of rows of the sockets 13. The planar filters 16 'used here are longitudinal Contact rails 5 held the ground connection through the metallic Create housing 2; they have two rows of contact areas 16.2 ', which are arranged in rows along the two edge regions of the Planar filters 16 'are arranged. Each of the contact areas is like shown enlarged as details - with one Contact tab 10 'provided in a bore 16.3 in the carrier 17th soldered in and with the assigned signal line potential lying capacitor covering 17.1 is connected. The on ground potential lying ground electrodes 17.2 are in the area of this Cut out hole 16.3. In the two details shown the assigned capacitor is on the left (from the contact tab from the seen) back of the planar filter, and on the right on it Front shown. The free end of the contact tab 10 'is after assembling the connector 1 on the (shown here) assigned metallic socket 13. Through this training the planar filter 16 'can be kept very flat, so that it can also be used with tightly populated connectors. The arrangement of the contact lugs 10 'is almost completely symmetrical and these can be kept short so that the unwanted Self-induction small and their distribution kept even can be.

Figure 4 shows a schematic plan view of a connector 1 with two rows of sockets 13, each row five has, without restricting the invention thereto, it being also understands by itself that these sockets 13 "on gap" can be set. The planar filter is shown in dashed lines 16, which - according to the representation in Figure 2- between the two rows of sockets 13 is located. The drawn, multiple jumped cut line V-V indicates, like the connector 1 is cut in the representation of Figure 5.

This Figure 5 shows the connector 1 in the left area in an external view. The sockets 13 are concealed in depth also indicated by dashed lines, like the central planar filter 16. Due to the jump in the middle area, the one located in the middle Socket 13 recognizable with the spring tabs 15.1 of the inside pointing anchor flags 15 as contact flags on the contact surface 16.2 of the planar filter 16 is present and thus with the associated Electrode of the capacitor of the planar filter 16, which in this Cut only on both sides of the socket 13, which is clamped in the Forming the housing of the connector 1 is used directly is recognizable. The cut is to the right of this central area jumped again, so that now the side wall of the planar filter 16 with a contact area assigned to this area 16.2 is visible, that of the molded onto the plastic insert 2.2 strip-like hold-down device 2.3 held in its position is. The socket 13 hidden in the row behind it is indicated here in dashed lines. The following jump of the cutting line V-V leads into this row of sockets behind, whereby the socket itself is not shown; you can see the Return 2.1, in which the outwardly pointing anchor flag 14 (Fig. 2) intervenes for fixation.

FIG. 6 shows a planar filter 16 schematically in view. The Longitudinal side edges are with the contact surfaces 16.1 for the ground electrode / electrodes occupied after insertion into the connector 1 with the clamping rails 5 (Fig. 3) are conductively connected. The contact areas that are brought out are near the longitudinal side edges 16.2 'arranged in two rows in which the contacts themselves alternate are provided so that the distances between each other Contact areas 16.2 'are twice as large as the distances between the assigned Plug pins 12 and sockets 13. Figures 6a and 6b finally show cross sections through the planar filter 16 itself. The embodiment according to FIG. 6a is essentially of the insulating, generally formed alumina carrier 17, the on both sides a first, continuous, conductive layer 17.2 has as the electrode lying at ground potential with the outer Contact surface 16.1 is conductively connected; being this flat Double electrode forms a shield that covers the two rows of Shields connector pins 12 and sockets 13 against each other. On this conductive surface 17.2 is a non-conductive, dielectric Layer 17.3 applied as a dielectric of the capacitors; here are usually used high-dielectric materials that are known from thick or thin film technology, for example barium titanate. The individual, via the contact surfaces 16.2 with the plug pins 12 or sockets 13 capacitor coverings to be brought into conductive connection 17.1 applied. A protective coating 17.4 covers the entire, in As a rule, planar filters 16 produced in screen printing technology, and offers Protection against environmental influences or mechanical influences. Figure 6b shows another structure of such a double-sided Planar filter 16: Here the carrier is a metal plate 18, to which the dielectric 18.3 is applied directly, which in turn carries the individual capacitor electrodes 18.1. The continuous Ground electrode is omitted here, it is replaced by the metallic one Carrier plate formed, which both the necessary Leitund Has shielding ability.

Claims (8)

1. Multi-pole plug connector having a plug-connector housing (2) provided with plastic inserts (6) and having provided therein at least one row of plug pins or jacks (12; 13) and at least one filter arrangement next to one or between two such row(s) with a number of capacitors which corresponds to the number of signal leads to be connected and which are arranged on a carrier, each connector pin or jack of the connector having allocated thereto a capacitor formed by an initial coating bonded with the connector pin or jack of the allocated signal lead, by a second coating connected to earth routed out to at least one side of the filter arrangement and connected to the casing of the plug connector, each of the adjacent connector pins, jacks (12; 13) being provided with a conductor connected with the allocated terminal point of the capacitor via contact pins or tags (10; 10'), characterised in that a planar filter with capacitors on one or two sides is provided to act as a filter arrangement, where the contact surfaces of the coatings of the capacitors on the relevant side to be connected by the connector pins/jacks are arranged in two rows close to both longitudinal sides of the planar filter, the contact surfaces of one row being alternately allocated to the even and those of the second row to the odd capacitors.
2. Plug connector as claimed in Claim 1, characterised in that the number of rows of the capacitors corresponds to the number of rows of connector pins or jacks.
3. Plug connector as claimed in Claim 1 or Claim 2, characterised in that the contact pins or tags (10; 10') connecting the contact points (16.2; 16.2') of the planar filter (16) with the connector pins or jacks (12; 13) are located in different planes.
4. Plug connector as claimed in Claim 3, characterised in that the planar filter (16) is formed by a metallic carrier (18), virtually the entire surface of which is covered with a dielectric coating (18.3) on which the individual electrodes (18.1) connectable with the connector pins or jacks (12; 13) are borne, the entire arrangement being provided with a protective cover (18.4).
5. Plug connector as claimed in Claim 3 or 4, characterised in that the contact pins or tags (10; 10'), which lie with one end adjacent to the connector pins or jacks (12; 13), are made preferably of the same material and are guided with their other end to the contact surfaces (16.2) of the capacitors of the planar filter (16) and joined metallically to these, preferably by means of soldering.
6. Plug connector as claimed in Claim 3 or 4, characterised in that the contact pins or tags (10; 10') are fitted - preferably soldered - in openings (16.3) provided in the planar filter (16), at least the earth electrode being recessed in the region of the opening (16.3).
7. Plug connector as claimed in any one of Claims 1 to 6, characterised in that the inside of the plug connector housing (2) is in a manner known per se filled with plastic inserts (6) forming a stacking layer formed from at least one layer, at least one of the layers (6) having groove-like recesses (6.1) for supporting flat contact ribs (10), the ends of which, on assembly, project initially into the opening through which the connector pins or jacks (12; 13) pass which, after the insertion of these connector pins (12) or connector jacks (13), are turned over and are in electrical contact therewith.
8. Plug connector as claimed in one of Caims 1 to 6, characterised in that the inside of the plug connector housing (2) is filled in a manner known per se with a compact plastic insert (6) in which guide channels (6.1) are provided for accepting the contact ribs (10) which, on assembly, project into the opening through which initially the plug connector pins or jacks (12; 12) pass with their preferably flattened ends and which after the said plug pin or jack (12; 13) have been introduced are turned over and are in electrical contact therewith.

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