EP1821369A2 - PCB plug-in extension - Google Patents

Abstract

A circuit board set comprises a plastic body (18) by the board with two contact groups (26,27) having contact ends (32) to the board that are both on the same side of the plastic body and plug ends (28) of the two groups on mutually opposite sides of the body. An independent claim is also included for a group as above having at least two plug sets.

Description

The invention relates generally to the field of connecting a printed circuit board to another printed circuit board, usually a so-called backplane. The invention particularly relates to a printed circuit board plug-in extension.

It is known to connect a circuit board directly into a connector, e.g. a card edge connector, plug in. As a result, printed conductors, which are guided in the edge region of the printed circuit board, contacted directly. The problem here is in particular that printed circuit boards are generally manufactured with fairly large tolerances. For example, a tolerance in thickness of ± 10% is common. This results in the problem that the PCB receiving connector must still ensure sufficiently high contact forces at a circuit board at the lower end of the tolerance, while at a circuit board at the top of the tolerances the risk of damage to the spring contacts in the plug part must be prevented and also high insertion forces should be avoided.

It is already known, for example from the U.S. Patent 6,899,546 to use a printed circuit board plug-in extension, which is plugged onto an edge region of the printed circuit board and contains contacts which contact the conductor tracks arranged there. The plug-in extension can then be plugged into a suitable connector. The disadvantage of this solution is, on the one hand, that a comparatively large installation space is required, since the printed circuit board push-in extension surrounds the printed circuit board on both sides. A further disadvantage is that a special connector for receiving the plug-in extension is necessary because its thickness is greater than the thickness of the circuit board.

The object of the invention is to provide a printed circuit board plug-in extension, which requires little space and can be plugged into a conventional card edge plug part.

To achieve this object, a circuit board plug-in extension is provided with a plastic body, which can be attached to a circuit board, with a first and a second group of contacts, each having a terminal end for contacting printed conductors on the circuit board and a plug-in end to Contacting contacts of a male part, wherein the terminal ends of the two groups of contacts are arranged on one and the same side of the body, while the mating ends of the first group are arranged on a different side of the body than the mating ends of the second group. The solution according to the invention is based on the basic idea of "copying" the area of the printed circuit board, which serves to make contact with the printed conductors, to the printed circuit board plug-in extension, but at the same time improving it. This concerns in particular the dimensions and tolerances. A plastic part can, in contrast to a printed circuit board, be manufactured with an accuracy of a few hundredths of a millimeter. In this way, the scatter of the insertion forces can be reduced when inserting the plug-in extension in the associated connector part. In particular, the plug-in extension can be manufactured with dimensions that lie at the lower end of the permissible tolerance field. In this way, there is a further reduction of the insertion forces. Furthermore, the area of the plug-in extension which serves for contacting is in the same plane as the printed circuit board. The circuit board can therefore be guided and plugged in the conventional manner. In addition, since the contacts of the plug-in extension are only connected from one side to the circuit board, while the plug ends are on both sides of the plug-in extension, resulting in very small dimensions.

Preferably, the body has at least one positioning projection, which can be positively inserted into a receptacle of the printed circuit board in order to position the plug-in extension. This makes it possible to attach the printed circuit board insertion extension precisely aligned with the printed circuit board, which is of particular importance when several printed circuit boards are combined to form a group.

Preferably, the positioning projection is a cylindrical pin. Such a pin can be easily inserted into a hole in the circuit board.

Preferably, it is provided that the body is provided between the contacts of a group with openings which allow a free punching of the contacts. This allows the contacts that must be passed through the body of the plug-in extension to punch so that they are initially connected by a bridge of material. This facilitates handling. Only after mounting on the body of the plug-in extension, the material bridges are removed by a suitable tool dips into the openings of the body. Then the contacts are separated.

It is preferably provided that the plug ends of the contacts terminate at different levels. This ensures that not all spring contacts of the plug part, in which the plug-in extension is inserted, are deflected simultaneously, but gradually. In this way, the insertion force is reduced.

Preferably, it is provided that incisions are provided in front of the plug-in ends, which end on a level lying further back in the insertion direction. The notches serve to guide the spring contacts of the plug part to the plug ends of the contacts located further back. The guide prevents the spring contacts from accidentally sliding on adjacent contacts. The leadership of the spring contacts will be further improved if oblique Einführfasen are provided at the front end of the incisions.

Preferably, air pockets are provided between the contacts and the body. The air pockets make it possible to adjust the impedance of the contacts in the desired manner. In this case, more air pockets can be provided at the front end of the plug ends, in front of the area in which attack the spring contacts of the plug part.

Preferably, it is provided that the body consists of one piece of two partial areas which overlap each other, and that the contacts are guided by means of an approximately right-angled transition portion from the first portion to the second portion. This shape of the body results in a particularly compact design. Furthermore, the transition portion of the contacts can be used advantageously for fastening the contacts themselves and for suitable biasing of the mating ends. The mating ends of the contacts are bent for this purpose not exactly perpendicular to the transition section, but depending on the arrangement at an angle slightly larger or smaller than 90 °. Only by the final insertion of the transition section in the correct position, the contacts are then in a Angle bent by 90 ° to the transition section, wherein the resulting elastic bias can be used to press the plug-in suitable in a receptacle associated with them.

It is preferably provided that the transition section is designed with a reduced width, so that latching hooks can be formed approximately with the width of the contacts. The reduction in the width of the transition sections makes it possible to bend the contacts in this area with less force. The latching hooks determine with their dimensions how closely juxtaposed the contacts can be punched out of a material web. If the snap hooks are formed in a region of reduced width, the contacts can ultimately be punched out closer together.

Preferably, it is provided that of the contacts of the first group, the terminal ends of the mass contacts are at a level that seen from the plug ends behind this level, the terminal ends of the signal contacts are that behind the terminal ends of the signal contacts, the terminal ends of the ground contacts of the second group of contacts and that behind it are the terminal ends of the signal contacts of the second group. The ground contacts of the two groups of contacts thus serve to shield between the signal contacts of the two groups, which improves the crosstalk attenuation.

It is preferably provided that spacers are arranged between the plug extensions, which are laterally inserted into the plug extensions, and that extends through the spacers and the lateral regions of the plug extensions each a dowel pin. The spacers make it possible to assemble several printed circuit boards and the associated printed circuit board insertion extensions into assemblies, so that several printed circuit boards can be pushed into the corresponding backplane connector parts at the same time.

Alternatively, it is provided that the spacers are integrally formed on the plug-in extensions. Each spacer is provided with a retaining pin and two positioning holes. This one-piece design reduces the manufacturing and assembly costs and also the tolerances occurring.

The invention also relates to a backplane with a plurality of backplane plug parts and a plurality of printed circuit boards with PCB plug-in extensions, which are assembled with the spacers to form an assembly.

Advantageous embodiments of the invention will become apparent from the dependent claims.

• Figur 1 eine Draufsicht auf einen erfindungsgemäßen Leiterplatten-Steckfortsatz;
• Figur 2 eine Rückansicht des Leiterplatten-Steckfortsatzes von Figur 1;
• Figur 3 eine Unteransicht des Leiterplatten-Steckfortsatzes von Figur 1;
• Figur 4 eine Vorderansicht des Leiterplatten-Steckfortsatzes von Figur 1;
• Figur 5 eine Seitenansicht des Leiterplatten-Steckfortsatzes von Figur 1;
• Figur 6 einen Schnitt durch den Leiterplatten-Steckfortsatz von Figur 1;
• Figur 7 in vergrößertem Maßstab ein Detail von Figur 6;
• Figur 8 eine Detailansicht des steckseitigen Endes des Leiterplatten-Steckfortsatzes;
• Figur 9 in wiederum vergrößertem Maßstab ein Detail der Steckseite des Leiterplatten-Steckfortsatzes;
• Figur 10 eine Unteransicht der Steckseite des Leiterplatten-Steckfortsatzes, wobei einige Kontakte entfernt wurden;
• Figur 11 einen Ausschnitt von einigen Kontakten des Leiterplatten-Steckfortsatzes, wobei zur Verdeutlichung der Körper des Steckfortsatzes nicht dargestellt ist;
• Figur 12 den Übergangsabschnitt von einigen Kontakten;
• Figur 13 in vergrößertem Maßstab ein Detail der Kontakte;
• Figur 14 ein Detail des Körpers des Leiterplatten-Steckfortsatzes, wobei die Kontakte nicht dargestellt sind;
• Figur 15 in vergrößertem Maßstab einen Ausschnitt des Leiterplatten-Steckfortsatzes, wobei die Kontakte vormontiert sind;
• Figur 16 in einer Detailansicht eine Draufsicht auf die montierten Kontakte;
• Figur 17 in einer vergrößerten Detailansicht die Anschlußenden einiger vormontierter Kontakte;
• Figur 18 in einer perspektivischen Ansicht eine Leiterplatte, die mit einem erfindungsgemäßen Leiterplatten-Steckfortsatz versehen ist, der wiederum in einen Kartenrand-Steckverbinder eingesetzt ist;
• Figur 19 in einer Seitenansicht die Baugruppe von Figur 18;
• Figur 20 in einer perspektivischen Ansicht eine andere Baugruppe, die aus mehreren Leiterplatten mit daran angebrachten Leiterplatten-Steckfortsätzen besteht und in Kartenrand-Steckverbinder eingesteckt werden kann;
• Figur 21 in einer perspektivischen Ansicht die Leiterplatten kurz bevor sie zusammengefügt werden;
• Figur 22 in einer schematischen Seitenansicht die noch nicht zusammengefügten Leiterplatten der Baugruppe von Figur 20;
• Figur 23 in einer perspektivischen Ansicht einen bei der Baugruppe von Figur 21 verwendeten Passstift;
• Figur 24 in einer perspektivischen Ansicht einen bei der Baugruppe von Figur 21 verwendeten Distanzhalter;
• Figur 25 in einer perspektivischen Ansicht einen Leiterplatten-Steckfortsatz gemäß einer alternativen Ausgestaltung;
• Figur 26 eine Draufsicht auf einen Leiterplatten-Steckfortsatz gemäß weiteren alternativen Ausgestaltung;
• Figur 27 eine Rückansicht des Leiterplatten-Steckfortsatzes von Figur 26;
• Figur 28 eine Unteransicht des Leiterplatten-Steckfortsatzes von Figur 26; und
• Figur 29 eine Seitenansicht des Leiterplatten-Steckfortsatzes von Figur 26.

The invention will be described below with reference to various embodiments, which are illustrated in the accompanying drawings. In these show:

• Figure 1 is a plan view of a printed circuit board plug-in extension according to the invention;
• Figure 2 is a rear view of the PCB plug-in extension of Figure 1;
• Figure 3 is a bottom view of the printed circuit board plug-in extension of Figure 1;
• Figure 4 is a front view of the printed circuit board plug-in extension of Figure 1;
• Figure 5 is a side view of the printed circuit board plug-in extension of Figure 1;
• FIG. 6 shows a section through the printed circuit board plug-in extension of FIG. 1;
• Figure 7 on an enlarged scale a detail of Figure 6;
• Figure 8 is a detail view of the plug-side end of the PCB plug-in extension;
• Figure 9 in turn enlarged scale a detail of the mating side of the PCB plug-in extension;
• Figure 10 is a bottom view of the mating face of the printed circuit board plug-in extension with some contacts removed;
• Figure 11 shows a section of some contacts of the printed circuit board plug-in extension, wherein for clarity, the body of the plug-in extension is not shown;
• Figure 12 shows the transition section of some contacts;
• Figure 13 on an enlarged scale a detail of the contacts;
• Figure 14 is a detail of the body of the printed circuit board push-in extension, wherein the contacts are not shown;
• Figure 15 on an enlarged scale a section of the printed circuit board plug-in extension, wherein the contacts are pre-assembled;
• Figure 16 is a detail view of a plan view of the mounted contacts;
• Figure 17 is an enlarged detail view of the terminal ends of some pre-assembled contacts;
• Figure 18 is a perspective view of a printed circuit board, which is provided with a circuit board plug-in extension according to the invention, which in turn is inserted into a card edge connector;
• Figure 19 is a side view of the assembly of Figure 18;
• Figure 20 is a perspective view of another assembly, which consists of a plurality of printed circuit boards with attached printed circuit board slot extensions and can be plugged into card edge connector;
• Figure 21 is a perspective view of the circuit boards just before they are assembled;
• Figure 22 is a schematic side view of the not yet assembled circuit boards of the assembly of Figure 20;
• Figure 23 is a perspective view of a dowel pin used in the assembly of Figure 21;
• Figure 24 is a perspective view of a spacer used in the assembly of Figure 21;
• FIG. 25 is a perspective view of a printed circuit board push-in extension according to an alternative embodiment;
• Figure 26 is a plan view of a printed circuit board plug-in extension according to another alternative embodiment;
• Figure 27 is a rear view of the printed circuit board tab extension of Figure 26;
• Figure 28 is a bottom view of the printed circuit board tab extension of Figure 26; and
• FIG. 29 shows a side view of the printed circuit board plug-in extension of FIG. 26.

The general structure of a printed circuit board push-in extension 10 according to the invention will now be described with reference to FIGS. 1 to 6. The printed circuit board push-in extension 10 is intended to be mounted on the edge of a printed circuit board so that a part of the printed circuit board plug-in extension projects away from the printed circuit board. For mounting and contacting the printed circuit board plug-in extension on the circuit board is at the PCB plug-in extension 10 a Terminal area 12 is provided, opposite to a plug-in area 14, which is intended to be plugged into a connector to connect the circuit board. The connection region 12 is formed on a first subregion 16 of the printed circuit board push-in extension 10, and the insertion region 14 is formed on a second subregion 18 (see in particular FIG. 5). The two portions 16, 18 are generally rectangular in shape and overlap each other in the middle of the printed circuit board plug-in extension 10. The printed circuit board plug-in extension 10 thus has, viewed from the side, a stepped shape. The two sections 16, 18 are integrally formed with each other and made of plastic, which can be molded with very high precision, in particular injection-molded.

The plug-in area 14 on the second portion 18 is designed in the manner of a wide, generally rectangular tongue, with two constrictions 20 are provided laterally. These can serve to lock the PCB plug-in extension 10 and thus also the printed circuit board attached thereto to a connector. In the region of the constrictions 20, the contacts are inward.

The first portion 16 is designed with a slightly greater thickness than the second portion 18 and has at its lateral edges in each case a positioning Vorspung 22 in the form of a cylindrical pin. The positioning tab 22 is used to hold the PCB tab extension 10 in a precisely defined position on a circuit board. In the vicinity of the positioning projections 22, the first portion 16 has a total of three openings 24, the task of which will be described later.

The printed circuit board push-in extension is equipped with two groups of contacts, which extend from the connection region 12 to the insertion region 14. A first group of contacts 26 extend with a mating end 28 along the second portion 18, then as a transition portion 30 on the first portion 16 and then as a terminal end 32 away from the first portion 16. A second group of contacts 27 extends with a mating end 28 along the side of the second portion 18, which faces away from the mating ends 28 of the contacts 26 of the first group, then by means of a transition portion 30 on the underside of the first portion 16 and then by means of a bent terminal end 32 through the first portion 16 through the connection area 12. The contacts 26 of the first group differ from the contacts 27th The second group thus essentially characterized in that the contacts 26 of the first group always remain on the same side of the body 16, 18 of the PCB plug-in extension 10, based on the representation of Figure 6 so on the upper side, while the contacts 27 of the second Group once cross section 16. Referring again to the view of FIG. 6, the mating ends 28 of the second group contacts 27 are on the underside of the PCB plug-in extension while the terminal ends 32 are on the top.

To improve the shield is provided that the contacts of a group whose terminal ends 32 are closest to the transition sections 30, are used as ground contacts. These ground contacts are marked with M in FIGS. 6 and 11. Such an arrangement results in the remaining terminal ends 32 of the first group contacts 26 being separated from the mating area by the terminal ends 32 of the contacts 26 and the terminal ends 32 of the grounding conductors of the second group contacts 27 as signal conductors used connection ends.

The contacts 26 of the first group can be easily placed on the body 16, 18 after punching, for example by using their terminal ends 32 for transport. With respect to the contacts 27 of the second group, this is somewhat more difficult, since the terminal ends 32 of the contacts 27 must be inserted through the first portion 16 therethrough. For this reason, it is provided for the handling of the contacts 27 that they are still connected by punching material bridges. It must then only a single entity consisting of a variety still integrally interconnected contacts handled. Only after the attachment of the contacts 27 on the PCB plug-in extension 10, the material bridges are removed. For this purpose, small punched openings 56 are provided in the second partial area 18, into which a punching tool can dip when it removes the material bridges provided between these contacts 27 at these locations.

As can be clearly seen in Figure 6 and in particular in Figures 8 to 9, the plug-in portion 14 is chamfered at its foremost end. For this purpose, the plug-in region 14 has a chamfer 34 on its upper side and its underside. The chamfer 34 causes the spring contacts of the connector, in which the printed circuit board plug-in extension 10 is inserted, are slowly deflected when plugging in to the outside. In addition, it is intended that the mating ends 28 of the contacts terminate at different staggered levels. As indicated in Figure 8, the contacts terminate at different levels, with four levels I to IV as shown here. The contacts starting at the first level I are preferably used as mass contacts M.

In front of the mating ends 28 of the contacts, which end or start at the second or third level, recesses 36 are provided which, in the case of two adjacent contacts starting at the same level, are separated by a partition wall 38. At the rear end of each incision 36, in turn, a chamfer 34 is provided. This configuration results in that the spring contacts of the connector are deflected during insertion of the printed circuit board plug-in extension 10 at different times. The later deflected spring contacts slide while in the incisions 36 and are optionally passed through the partitions 38 and provided at the front edge Einführfasen 40 (see in particular Figure 9) on the mating end of their associated contact.

The mating ends 28 of the contacts 26, 27 are in suitable receptacles 42 of the second body 18. Below the plug-in ends 28, a plurality of air pockets 44 are provided in the exceptions 42 (see in particular FIGS. 7 and 10). The air pockets serve on the one hand for impedance matching. On the other hand, they are advantageous for the correctly aligned, planar arrangement of the plug-in ends 28 in the receptacles 42; it is easier to partially support the plug-in ends 28 than to have to create a continuous, flat bearing surface. In the contacts which start at the first level I, the pockets 44 may be arranged in front of the area in which the spring contacts of the connector abut against the contacts when the printed circuit board push-in extension 10 is fully inserted into the connector; this area is indicated in Figure 10 with B.

In Figure 11, the contacts 26, 27 can be seen. In this figure, it can be clearly seen that each contact 26, 27 has two latching hooks 46 formed on opposite sides of the transition section 30. These latching hooks can also be seen in FIGS. 12 and 13. As can be seen particularly well in FIG. 13, the latching hooks 46 are arranged at juxtaposed levels by adjacent contacts of a group. The different height arrangement of the latching hooks on the one hand has the advantage that higher anchoring forces in the body of the printed circuit board plug-in extension 10th result. It is available for the transfer of holding forces more material available, if not at the same height the latching hook of the adjacent contact must be retained. On the other hand, there are better values in terms of shielding, since the minimum distance between the latching hooks is greater if they are arranged at different levels. Furthermore, it should be noted that the contacts are made in the transition sections with reduced width. This can be seen well in FIGS. 12 and 13. This makes it possible to punch out the latching hooks from the material width of the contact, without having to start with an increased material width. By this measure, the distance between the latching hook adjacent contacts is further increased, which brings additional advantages in terms of holding power and shielding.

In addition to the latching hooks 46 on the transition section, the contacts 27 of the second group have two latching hooks 48 on opposite sides of the connection end 32, respectively.

The attachment of the contacts 26, 27 on the sub-areas 16, 18 of the printed circuit board extension 10 is essentially by means of a groove 50 which is formed at the transition from the first portion 16 to the second portion 18 on the side of the terminal portion 12 (see in particular the figures 6, 14 and 15). In the grooves 50, the transition portions 30 of the contacts 26 of the first group and the contacts 27 of the second group are accommodated. Viewed in cross-section, the groove 50 has a trapezoidal shape, which is shown in FIG. 16. Due to the trapezoidal shape, the groove narrows towards the outside, so that the transition section 30 of the contacts 26, 27 is held towards the partial region 16 or 18.

On its upper side, from which the transition sections are inserted into the groove, each groove 50 has an insertion section 52, which is designed as a concave groove. The bottom of the channel is located laterally next to the groove 50 and has its lowest point approximately at the point at which the transition section 30 should be located after insertion. When the contacts are inserted with their transitional sections in the grooves 50, the transition sections and in particular the latching hooks 46 are guided by the insertion sections 52 in the correct position. The contacts are then pressed in so far that the latching hook 46 dig into the material of the corresponding portion 16, 18 and anchor there the transition sections. At the same time, the Terminal ends 32 of the contacts 27 of the second group are pressed so that dig the additional locking hooks 48 (see Figure 17) in the material of the first portion 16.

For the purpose of correct positioning of the mating ends 28 of the contacts 26, 27, these are designed so that the angle α (see Figure 6) between the mating ends 28 and the transition sections 30 at the contacts 27 of the second group is slightly greater than 90 °, while the angle β between the mating ends 28 and the transition portions 30 of the contacts 26 of the first group is slightly less than 90 °. Then, when the transition portions 30 are pressed in the direction of the arrows P of Figure 6, the angle β is bent to 90 °, while the angle α is compressed to 90 °. In both cases, the mating ends 28 are resiliently acted upon in the receptacle 42 provided for them in the first body 18, where they remain without further action.

With the arrangement of the contacts 26, 27 shown, in particular, a very close arrangement of the contacts can be achieved. In a conventional embodiment, the contacts are arranged in a pitch of 0.75 mm. From this it can be seen how little space between the contacts is available for anchoring them.

The printed circuit board plug-in extension 10 equipped with the contacts 26, 27 can be placed on the edge of a printed circuit board 60 (see FIGS. 18 and 19), with the terminal ends 32 of the contacts 26, 27 being connected to corresponding printed conductors of the printed circuit board 60. The terminal ends 32 can either be soldered, soldered or pressed. The additional latching hooks 48 of the contacts 27 of the second group ensure that the terminal ends 32 of these contacts are not pushed out of the first portion 16; the terminal ends 32 of the contacts 26 are supported without further measures reliably on the first portion 16 from. For positioning of the printed circuit board push-in extension 10 on the printed circuit board 60, this is provided with suitable holes into which the positioning projections 22 can engage. The printed circuit board 60 can then be plugged with the PCB plug-in extension 10 in a card edge connector 70, which is arranged here on another circuit board 72, for example, a backplane. The use of the printed circuit board push-in extension 10 has the particular advantage that its plug-in region 14 can be designed with much higher accuracy than the edge region of a printed circuit board. Consequently For example, the contact forces that occur when inserting the board tab extension 10 into the card edge connector 70 can be much better controlled.

FIG. 20 shows an assembly which here consists of four interconnected printed circuit boards 60. For connecting the printed circuit boards, spacers 80 (see in particular FIG. 24) are used between the printed circuit board insertion extensions, each having two holding pins 82 on opposite sides. A positioning opening 84 extends centrally through each spacer 80. The position of the retaining pins 82 and the positioning opening 84 corresponds to the arrangement of the openings 24 on the printed circuit board push-in extension 10.

To assemble the printed circuit boards 60 into an assembly, the retaining pins 82 of the spacers 80 are inserted into the outer openings 24 of the printed circuit board tab extensions 60 arranged on the printed circuit boards 60. Then, a dowel pin 86 (see FIG. 23) is pushed through the positioning hole 84 of the spacers 80 and through the center hole 24 of the board tab extensions 10. In this way, all components are precisely aligned relative to each other, so that the assembly of the plurality of printed circuit boards 60 can be inserted into closely adjacent card edge connector 70, which are arranged on another circuit board 72, for example, a backplane.

The precise positioning of the PCB tab extensions 10 on the circuit boards 60 as well as their precise alignment with each other via the spacers 80 is particularly important because some of the circuit boards 60 are usually guided in a (not shown) guide so that they correctly into the card edge connector 70 can be inserted. If some of the PCB tab extensions 10 are not positioned correctly, alignment errors will result. For example, the circuit boards 60 could be fan-shaped rotated against each other. In this case, it is hardly possible to correctly guide the circuit boards by means of the guides provided so that the printed circuit board tab extensions 10 meet in their associated connector.

In order to ensure a precise positioning of the printed circuit board insertion extensions 10 with respect to their distance from each other, it is provided to carry the retaining pins 82 with such a length that they abut each other directly when the actually arranged between them portion 16 has a too small thickness. In this way it can be prevented that the spacers 80 in too small a distance from each other can be arranged, which in turn would lead to a too small distance between the individual PCB plug-in extensions 10.

In Figure 25, an alternative embodiment is shown in which the spacers 80 'are integrally formed on the plug-in extensions 10. Each spacer 80 is provided with a retaining pin 82 and two positioning holes 84. This one-piece design reduces the manufacturing and assembly costs and also the tolerances occurring.

FIGS. 26 to 29 show a plug-in extension according to an alternative embodiment, which differs from the plug-in extension shown in FIGS. 1 to 5 in that the lateral constrictions have been dispensed with. It is therefore not necessary to let the contacts dodge inwards. Instead, all contacts can be made straightforward.

LIST OF REFERENCE NUMBERS

10:

PCB plug extension

12:

terminal region

14:

plug-in region

16:

first subarea

18:

second subarea

20:

constriction

22:

positioning projection

24:

opening

26:

Contacts of the first group

27:

Contacts of the second group

28:

plug-in end

30:

Transition section

32:

terminal end

34:

chamfer

36:

incision

38:

partition wall

40:

chamfer

42:

recess

44:

air pocket

46:

latch hook

48:

additional latching hook

50:

groove

52:

insertion

60:

circuit board

70:

Card Edge Connector

72:

further printed circuit board

80:

spacer

82:

retaining pins

84:

positioning opening

86:

dowel

Claims (28)

A printed circuit board push-in extension (10) having a plastic body (16, 18) attachable to a circuit board, having first and second sets of contacts (26, 27) each having a terminal end (32) for contacting Conductor tracks on the circuit board and a plug-in end (28) for contacting contacts of a plug part, wherein the terminal ends (32) of the two groups of contacts (26, 27) on one and the same side of the body (16, 18) are arranged during the mating ends (28) of the first group are arranged on a different side of the body (16, 18) than the mating ends (28) of the second group. Printed circuit board push-in extension according to Claim 1, characterized in that the body (16, 18) has at least one positioning projection (22), preferably a cylindrical pin (22) which can be positively inserted into a receptacle of the printed circuit board in order to fix the plug-in extension (10 ). Printed circuit board push-in extension according to one of the preceding claims, characterized in that the body (16, 18) has two constrictions (20) laterally, which serve for latching in a plug part. A printed circuit board push-in extension according to one of the preceding claims, characterized in that the body (16, 18) is provided between the contacts (26, 27) of a group with punched openings (56) which allow the contacts to be punched free. Printed circuit board extension according to one of the preceding claims, characterized in that the contacts (27) of the second group extend through the body (16, 18). Printed circuit board push-in extension according to one of the preceding claims, characterized in that the plug-in ends (28) of the contacts terminate at different levels, in particular at four different levels (I, II, III, IV). Printed circuit board plug-in extension according to Claim 6, characterized in that the body (16, 18), viewed in the insertion direction, has a chamfer (34) in front of each plug-in end (28). PCB plug-in extension according to one of claims 6 and 7, characterized in that incisions (36) are provided in front of the plug-in ends (28) which terminate in a level lying further behind in the insertion direction. Printed circuit board extension according to claim 8, characterized in that the notches (36) are provided with oblique Einführfasen (40). Printed circuit board push-in attachment according to one of the preceding claims, characterized in that air pockets (44) are provided between the contacts (26, 27) and the body (16, 18). Printed circuit board push-in extension according to Claim 10, characterized in that the contacts (26, 27) in the region B of the contact with the plug part are supported by the body (16, 18). Printed circuit board plug-in extension according to claim 11, characterized in that a further air pocket (44) is provided under the plug ends (28) which, viewed in the plugging direction, terminate at the frontmost level before the areas of contacting supported by the plug part. A printed circuit board push-in extension according to one of the preceding claims, characterized in that the body consists of two partial regions (16, 18) which overlap one another, and in that the contacts (26, 27) are formed by means of an approximately right-angled transition section (30) from the first partial region (16) on the second portion (18) are guided. Printed circuit board push-in extension according to Claim 13, characterized in that the two partial regions (16, 18) are made in one piece with one another. A printed circuit board push-in extension according to claim 13 or claim 14, characterized in that the transition section (30) is guided in a groove (50). A printed circuit board push-in extension according to claim 15, characterized in that the groove (50) is provided with an insertion section (52). A printed circuit board insert extension according to claim 16, characterized in that the insertion section (52), viewed in the direction of insertion of the contacts (26, 27), has a concave shape, in particular designed in the manner of a semicircular channel. A printed circuit board push-in extension according to one of claims 15 to 17, characterized in that the groove (50), viewed perpendicularly to the direction of insertion of the contacts (26, 27), has a trapezoidal cross-section. Printed circuit board extension according to one of claims 15 to 18, characterized in that the groove (50) guides the transition section (30). Printed circuit board push-in attachment according to one of Claims 15 to 19, characterized in that the transition section is fixed in the groove (50) by means of at least one latching hook (46). Printed circuit board insertion extension according to claim 20, characterized in that the latching hooks (46) of adjacent transition sections are at different heights. A printed circuit board plug-in extension according to claim 20 or claim 21, characterized in that the transition section (30) is designed with a reduced width and the contact at the height of the latching hooks (46) have approximately the remaining width. Printed circuit board push-in extension according to one of Claims 19 to 22, characterized in that, in the case of the first group of contacts (26), the angle (β) between the transition section (30) and the plug-in end (28) is slightly less than 90 °, so that the plug-in end (28) during the pressing of the contact (26) in the body (16, 18) is tensioned against this. Printed circuit board push-in extension according to one of Claims 19 to 23, characterized in that, in the case of the second group of contacts (27), the angle (α) between the transition section (30) and the plug-in end (28) is slightly greater than 90 °, so that the male end (28) when pressing the contact (27) in the body (16, 18) is tensioned against this. Printed circuit board push-in extension according to one of the preceding claims, characterized in that the contacts (27) of the second group are provided at the connection end with at least one latching hook (48) which can be pressed into the body (16, 18). PCB plug-in extension according to one of the preceding claims, characterized in that of the contacts (26) of the first group, the terminal ends (32) of the mass contacts (M) are at a level that seen from the plug ends behind this level, the terminal ends (32) of the Signal contacts are that behind the terminal ends of the signal contacts, the terminal ends of the ground contacts (M) of the contacts (27) of the second group is and that behind the terminal ends of the signal contacts of the second group. Assembly with two or more plug-in extensions according to one of the preceding claims, characterized in that between the plug extensions spacers (80) are arranged, which are arranged laterally on the plug extensions (10), and that by the spacers (80) and the lateral areas the plug-in extensions each a dowel pin (86) extends. An assembly according to claim 27, characterized in that the spacers (80) are integrally formed on the printed circuit board insertion extensions (10).

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