DE19802089C2 - Contact plug connection and contact plug - Google Patents

Description

The invention relates to a contact connector according to Preamble of claim 1 and a contact plug according to Preamble of claim 14.

State of the art

A contact connector of the type mentioned is known. It has a contact socket that at least a contact area is assigned. With this contact area acts when the contact connector is plugged together Mating contact surface together, which is assigned to a contact plug is. The counter contact surface is spring-loaded, so that a secure electrical connection to the contact surface realized can be. Thus, an electrically conductive connection between a multi-layer circuit board and another component, for example another circuit board or a test device, getting produced. Also known as the skirting board Contact socket is the top and / or bottom of the Multi-layer circuit board assigned on which the electrical  or electronic components arranged are.

The disadvantage here is that the known contact Connectors that are on the surface of the More layer PCB are arranged, a place be claim that with increasing component density not more is available. Another disadvantage is that these contact connectors regarding their Take up high space, which for some electronics devices is not available. This means, the contact plug connection towers above all electronic components on the circuit board, ins special if the circuit board in the so-called SMD technology is realized.

With such densely populated circuit boards the individual components and their connecting lugs small that small distances between each Components can be adhered to. Therefore, it is especially difficult when troubleshooting signals to measure because placing test points on the board surface difficult in some Cases is even impossible. Even those in the state of the Technology also known contacts via so-called needle adapters are not used here dung, as for landing areas, i.e. test points, for the Needle adapter no space on the circuit board Available. With the tightly packed components there is still a risk that a needle adapter a short circuit between two neighboring An evokes final flags. In some cases len to destroy the electronic circuit to lead.  

From WO 96/1413 is a generic multilayer printed circuit board with the side arranged connector known, in which the associated Plug is held by springs.

US 4,116,516 describes an electrical connection for a printed circuit that is a multi-layer existing cable.

The "Patent Abstracts of Japan" for JP 08 330 506 A describes the connection of two circuit boards with one conductive Adhesive to compensate for thermal tensions.

The invention therefore solves the problem of a space to provide height-saving contact plug connection, the one sufficient spring force guaranteed and in a simple manner can be realized.  

The contact connector according to the invention on at least one three-layer multilayer circuit board stands out in particular from the fact that part of the contact plug-in binding, namely the contact plug through two circuit boards is formed between which one resiliently deformable intermediate layer. By this intermediate layer becomes the mating contact surface of the contact spring loaded, so that a safe electrical connection between the mating contact surface and the Contact area can be produced, which is therefore a small has electrical contact resistance. The intermediate layer is formed by an adhesive that the layers of the Contact plug holds together. The intermediate layer thus serves on the one hand as a spring device and on the other hand the safe Connection of the layers of the contact plug.

Such circuit boards, including the conductor track section, are particularly easy and inexpensive to manufacture. Without further ado it is also possible between these two layers the elastic to arrange deformable intermediate layer. So the contact is connector is particularly simple. Due to the elastic ver mouldable intermediate layer, the two layers in one Spaced from each other so that the mating contact surface against the contact area in the contact socket is pushed.  

The contact socket is through the walls of the individual Layers of the multilayer printed circuit board formed. The contact So the socket is practically within the multi-layer Circuit board. This can ensure reliable contacting via a Contact plugs are used because they are routed inside the socket is. Thus signals can be measured safely without doing so To trigger malfunctions by short circuits. Further is advantageous that the contact according to the invention Plug connection when using multiple contact surfaces multiple signals can be measured simultaneously. This is This is particularly advantageous for data buses, since it is particularly useful here when troubleshooting several signals measured simultaneously and must be compared with each other. Furthermore, the inventive contact connector the advantage that in essentially no influence on the circuit behavior or the function of the electronic circuit occurs because - in contrast to the known needle adapters - no large metal parts near the electronic Circuit must be brought and therefore essentially none Radio frequency interference occur. Beyond that it is also possible with the help of the contact Connector to tap signals from a circuit board, too if, for example, in a so-called shielding housing  is housed there with the help of the contact plug the electrical connection is made and from the Shield housing can be brought out. Close Lich is advantageous in that it is within the multi-layer printed circuit board socket is also possible to lead out signals, which are only within, i.e. between two layers available.

In a preferred embodiment, it is preseeded hen that the opening of the contact socket on egg ner peripheral wall of the multilayer circuit board lies. This means it is on the top and bottom the entire surface of the multi-layer circuit board Component assembly available. So on the multilayer circuit board a larger number of electronic components are housed.

In a particularly preferred embodiment provided that the contact surface by a Lei terbahn section is realized, the one location is ordered, which is a wall of the contact plug socket forms. This conductor track section can be a Part of a trace or an extension of one Be a conductor track to be contacted. Hence The conductor track practically performs a double function. On the one hand, it serves for the electrical connection of Components and on the other hand it forms the contact surface of the contact socket.

In a preferred embodiment is before seen that the conductor track section an elek trically conductive material application. When in engaging a contact plug in the con tact socket is thus safely prevented  the conductor track is damaged because the mating contact surface of the Contact plug only interacts with the material order.  

In a preferred embodiment it is provided that at least one layer of the contact plug the counter contact surface having.

In a particularly preferred embodiment provided that the counter-contact surface of the contact plug one has electrically conductive material application. So is also the mating contact surface when inserting the contact plug in the contact socket is protected from damage. Since the Counter contact surface is quasi spring-loaded, when inserted of the contact plug in the contact socket in particular advantageously achieved that the material application of the Pull the mating contact surface and the contact surface together  ben, so that any oxide layers present be worn. This leads to a reduction in the electrical contact resistance.

In a preferred embodiment, that the material application of the mating contact surface Exceeds the height of the contact plug, and that the Ma material order on the conductor track section of the Kon clock socket protrudes into this. Thus lie not the surfaces of the contact plug and the Contact socket flat on each other, but only the contact surface and the counter contact area. This creates the elastically deformable Intermediate layer, which acts as a spring device, only a contact pressure on this contact surface chen.

In a preferred embodiment is before seen that the contact plug on his forehead side has a bevel. That way he can particularly easily inserted into the contact socket be stuck.

A particularly preferred embodiment is characterized in that the material order the mating contact surface on its the front side of the Contact plug facing end of a casserole owns oblique. This causes the material order to come up not blunt on the contact surface of the contact Socket. This also leads to a special simply plug the contact plug in the contact socket, also damage to the contact or counter account tact areas safely avoided.  

In a further preferred embodiment, that the material application of the contact surface at its the opening the contact socket has facing bevel.

The task is also accomplished through a contact plug with the features of claim 14 solved.

This contact plug is particularly characterized by that it is formed by at least two layers, between which an elastically deformable forming a spring device Intermediate layer lies. The advantage here is that this Contact plug used for particularly small plug connections can be. On specially trained counter-contact surfaces that - in the prior art - can be bent in the manner of a spring to be dispensed with here. So this connector is also special easy and inexpensive to manufacture.

Further refinements result from the subclaims.

drawing

The invention is based on an embodiment with reference explained in more detail on the drawing.

Show it:

Fig. 1 is a plan view of a contact connector,

Fig. 2 is a sectional view of the contact-bond Steckver along the line II-II in Fig. 1,

Fig. 3 is a view onto the front side of a part of the contact-connector according to arrow III in Fig. 2,

Fig. 4 is a plan view of the composite contact connector of Fig. 1 and

Fig. 5 is a sectional view taken along the line VV of Fig. 4.

Embodiment

In Fig. 1 a multi-layer Lei terplatte 1 is shown in detail. Components (not shown), in particular using SMD technology, are applied to the top 3 thereof. These are interconnected via interconnects, not shown here. The multilayer printed circuit board 1 is delimited by a peripheral wall 5 , it also has an end face 7 . A recess 9 extends from the end face 7 into the multilayer circuit board 1 . The recess 9 therefore has an opening 11 .

In the recess 9 end conductor track sections 13 , the continuations of in and on the multilayer Lei terplatte 1 arranged conductor tracks. These conductor track sections 13 thus have electrical connections to the components arranged on the multilayer printed circuit board 1 . The Leiterbahnab sections 13 run in the direction of the multi-layer circuit board 1 and at a distance from each other.

The recess 9 and the conductor track sections 13 form a contact socket 15 , the contact surfaces 17 through the conductor track sections 13 are gebil det. The contact socket 15 has a width B which is less than the distance between two opposite walls 5 'and 5 "of the circumferential wall 5 .

In Fig. 1, a contact plug 19 is still visible, on the upper side 21 Leiterbahnab sections 23 are arranged. They run in the longitudinal direction of the contact plug 19 and at a distance from one another. These conductor track sections 23 form mating contact surfaces 25 of the contact plug 19th The contact plug 19 has a bevel 29 on its end face 27 . The width C of the contact plug 19 is slightly smaller than the width B of the recess 9 of the contact socket 15 , so that when the contact plug 15 is inserted into the contact plug 19, a ge ring game, preferably 0.3 mm, between egg ner Side wall 31 of the contact plug 19 and a side wall 31 'of the recess 9 is present.

The conductor track sections 23 of the contact plug 19 can be connected to a flexible connecting line (not shown here) at the end of the contact plug 19 not shown here.

Fig. 2 shows the arrangement of Fig. 1 in ge sectional side view. The section runs along the section line II-II shown in FIG. 1. The multilayer printed circuit board 1 has several, here for example eight, layers 33 stacked on one another. On the top 3 and / or on the bottom 3 ', electronic components can be arranged. These are connected to each other via interconnects. In order to achieve contacting of all components, conductor tracks are likewise arranged between the individual layers 33 and can be connected to one another by a through-connection between at least two layers. The recess 9 of the contact socket 15 has a height H which is at least as large as the height D of the contact plug 19 . The height H represents the distance between two opposing walls 34 and 34 ', which have the conductor track sections 13 .

An electrically conductive material application 35 is applied to the contact surfaces 17 of the contact socket 15 . This preferably consists of an alloy containing tin, in particular solder. The material application 35 is carried out along the conductor track sections 13 with a constant thickness and ends at a distance from the opening 11 . At its end facing the opening 11 , the mate rial order has a run-up slope 37 so that a region of the material order 35 decreasing in thickness in the direction of the opening 11 is formed.

The Kontaktstec ker 19 shown in section in FIG. 2 comprises two layers 39 and 41 which are formed by printed circuit boards. The conductor track sections 23 are applied to the top 21 of the layer 39 . On the underside 21 ', conductor track sections 23 are also applied which, like the conductor track sections arranged on the top 21, are formed sections 23 . On the Leiterbahnab sections 23 are at the front end of the Kon contact plug 19 electrically conductive Materialauf orders 35 'applied with a constant thickness. At the end 27 facing the end of the material orders 35 'is also seen a run-up slope 37 before. The thickness of the material application 35 ′ thus decreases in the direction of the end face 27 . Between the layers 39 and 41 there is an elastically deformable intermediate layer 43 which forms a spring device 45 . The intermediate layer 43 is formed by an adhesive, which thus connects the layers 39 and 41 firmly, but elastically to one another.

It is readily apparent that the contact socket 15 and the contact plug 19 form a contact connector 47 . With this multilayer wiring board 1 can thus ver current conductor tracks or contacts are led to the outside in the interior of the. In addition, it is readily apparent that the entire top 3 and bottom 3 'of the multi-layer circuit board 1 can be equipped with construction parts with the contact connector 47 thus realized. It is thus possible to optimally utilize the existing assembly area.

Fig. 3 shows a view in the direction of arrow III ( Fig. 2) on the end face 7 of the multi-layer Lei terplatte 1st It can be clearly seen here that the recess 9 extends over a total of three layers 33 . Of course, it is also possible to reduce the height of the recess 9 so that one or two layers 33 are spanned. In addition, it is easily possible that a plurality of recesses 9 can be introduced into the peripheral wall 5 , so that plate 1 for a multi-layer conductor 1 several contact plug connections 47 can be realized.

FIG. 3 also shows the conductor track sections 13 which are at a distance from one another.

In Fig. 4, the contact connector 47 is shown in a partially coupled state, wherein the contact plug 19 is not completely inserted into the con tact socket 15 . It is particularly clear here that the conductor track sections 13 and 23 lie opposite one another, so that the contact surfaces 17 and mating contact surfaces 25 can touch one another and thus an electrical connection is realized.

In Fig. 5 the contact connector 47 is in section along the line VV ( Fig. 4) ben ben. The same parts as in Figs. 1 to 4 are given the same reference numerals. In this respect, reference can be made to their description.

Fig. 5 shows the contact connector 47 in a partially coupled position, that is, the con tact connector 19 is not fully inserted into the con tact socket 15 . From this Dar position it is clear that the intermediate layer 43 is pressed together by shifting the layers 39 and 41 . The nesting of the contact plug 19 and the contact socket 15 is made possible by that the bevel 29 meets the on slope 37 of the material order 35 . There is thus a force effect which forces the layers 39 and 41 together, so that the intermediate layer 43 is biased in the manner of a spring. This reduces the height D of the Kontaktstec core 19 , so that the layers 39 and 41 come to lie between the top and bottom material application 35 . In a further insertion of the contact plug 19 in the contact socket 15, the run-on slope 37 'of the material deposit 35' on the leading bevel 37 meets the material application 35th As a result, the layers 39 and 41 are moved towards one another and the intermediate layer 43 is further pretensioned or compressed. By this bias, the material orders 35 and 35 'with a pressing force against each other ge, whereby a reliable contact with ge ringem electrical contact resistance arises. By this pressing force during the insertion of the contact plug 19 is also creates a friction between the material contracts 35 and 35 ', the possibly existing dirt or oxide layers ent safely removed. The surfaces of the material orders 35 and 35 'are cleaned with each insertion process. This results in a constant, low electrical contact resistance. It is readily apparent that the contact plug 19 can also have more than two layers. The key is the deformable intermediate layer.

From what has been said above, it is readily apparent that the contact plug connection 47 is used for contacting the conductor tracks from within the multilayer printed circuit board 1 . The number of conductor tracks is of minor importance. The contact connector 47 thus enables a connection to a tester when troubleshooting or testing. However, it is also readily possible to use the contact connector 47 as a permanent module connection within an electrical or electronic device. For this purpose, it can be provided that the contact plug 19 has a locking lug (not shown), which is provided, for example, on the top 21 , which interacts with a recess or depression provided in the contact socket 15 (not shown). This enables a permanently secure plug connection to be implemented.

Of course, it is also possible to engage the con tact connector 19 with a contact socket, which is arranged as a separate component on a circuit board. This means that the contact plug 19 does not have to be used with the contact socket lying here within the multilayer printed circuit board 1 . It is also possible to use the contact socket 15 with a known con tact plug, which has mating contact surfaces which are acted upon in a known manner with a spring force. These counter-contact surfaces can be curved, for example, which provide the required spring force.

The contact plug 19 is characterized in that its height D can be kept particularly low, so that there is little space required for the plug connection. In addition, it is particularly easy to manufacture, since not every mating contact surface has to be designed as a spring element.

In a further embodiment it is provided that the Height of the contact plug when unloaded Spring device approximately as large as the distance between two opposite each other, the conductor track section having walls of the contact socket. About that big means that the height of the contact plug is the same size or is greater than the distance between the opposite walls. As a result, when the contact plug is inserted into the contact The spring device is biased so that the Contact plug is held securely in the contact socket and on the other hand the already mentioned low electrical transition there is resistance between the contact surfaces.

Claims (14)

1. Contact plug connection on a multilayer printed circuit board ( 1 ) having at least three layers ( 33 ) with a contact plug socket ( 15 ) having at least one contact surface ( 17 ) and with a contact plug ( 19 ) pointing at least one counter-contact surface ( 25 ) , Walls ( 34 ; 34 ') of the contact socket ( 15 ) being formed by the layers ( 33 ) of the multilayer printed circuit board ( 1 ), characterized in that the contact plug ( 19 ) is formed by at least two printed circuit boards ( 39 ; 41 ) is formed, between which there is an elastically deformable intermediate layer ( 43 ), so that the mating contact surface ( 25 ) is spring-loaded in the connected state of the contact plug connection, the intermediate layer ( 43 ) being formed by an adhesive which bonds the printed circuit boards ( 39 ; 41 ) holds together. 2. Contact plug connection according to claim 1, characterized in that the opening ( 11 ) of the contact socket ( 15 ) on a peripheral wall ( 5 ) or end face ( 7 ) of the multi-layer circuit board ( 1 ). 3. Contact plug connection according to claim 1 or 2, characterized in that the contact surface ( 17 ) is realized by at least one conductor track section ( 13 ) which is assigned a layer ( 33 ) which one of the walls ( 34 ; 34 ') of Contact socket ( 15 ) forms. 4. The device according to claim 3, characterized in that the conductor track section ( 13 ) has an electrically conductive material order ( 35 ). 5. Contact plug connection according to one of the preceding claims, characterized in that at least one printed circuit board ( 39 ; 41 ) of the contact plug ( 19 ) has the mating contact surface ( 25 ). 6. Contact plug connection according to one of the preceding claims, characterized in that the mating contact surface ( 25 ) is formed by at least one conductor track section ( 23 ) which is assigned to a printed circuit board ( 39 ; 41 ). 7. Contact plug connection according to one of the preceding claims, characterized in that the mating contact surface ( 25 ) of the contact plug ( 19 ) has an electrically conductive material application ( 35 '). 8. Contact plug connection according to claim 4 or 7, characterized in that the material application ( 35 , 35 ') is a tin-containing alloy. 9. Contact plug connection according to claim 7, characterized in that the material application ( 35 ') on the conductor track section ( 23 ) of the contact plug ( 19 ) projects above its height (D). 10. Contact plug connection according to claim 4, characterized in that the material application ( 35 ) on the conductor section ( 13 ) of the contact socket ( 15 ) protrudes into it. 11. Contact plug connection according to one of the preceding claims, characterized in that the contact plug ( 19 ) on its end face ( 27 ) has a bevel ( 29 ). 12. Contact plug connection according to claim 7, characterized in that the material application ( 35 ') of the counter contact surface ( 25 ) on its the end face ( 27 ) of the contact plug ( 19 ) facing end has a run-up slope ( 37 '). 13. Contact plug connection according to claim 4, characterized in that the material application ( 35 ) of the contact surface ( 17 ) at its opening ( 11 ) of the contact socket ( 15 ) facing end has a run-up slope ( 37 ). 14. Contact plug for a contact plug connection, in particular according to one of claims 1 to 13, characterized in that the contact plug ( 19 ) is formed by at least two printed circuit boards ( 39 ; 41 ), between which at least one elastically deformable intermediate layer ( 43 ) is located, the intermediate layer ( 43 ) being formed by an adhesive which holds the circuit boards together.