DE102021118853B4 - Multi-part PCB adapter plug with specific interface - Google Patents

Abstract

Adapter plug (100) for electrically conductive contacting of a printed circuit board with at least one additional electrical component, having at least one contact (P, K) for conducting electricity within the adapter plug (100), comprising a substantially round contact insert, the adapter plug (100) having at least two parts and such is constructed geometrically, the two mutually non-parallel mating planes are formed by the mating directions (SV, SL), the mating directions (SV, SL) being arranged at an angle of about 90 degrees to each other and with at least two groups of contacts (P) in the contact insert of different sizes (B1, B2) and wherein the first group has four contacts (3, 5, 6, 7) of size (B1) and the second group has at least 9 contacts (A, B, C, D, E, F , G, H, J) of the smaller size (B2) with a contact arrangement selected as follows:a. three contacts (E, F, G) of size (B2) lie on an imaginary vertical dividing line (T1) which runs through the center point (M) of the round contact insert; b. a contact (3) of size (B1) lies on an imaginary horizontal dividing line (T2) which runs perpendicular to the vertical dividing line (T1) and also runs through the center point (M) of the round contact insert;c. two contacts (5, 7) of size (B1) are approximately mirror images of the horizontal dividing line (T2); d. two contacts (H, J) of the smaller size (B2) are diametrically opposed to the vertical dividing line (T1) with the same distance from the horizontal dividing line (T2);e. two contacts (A, B) and two contacts (C, D) of the smaller size (B2) are arranged one above the other in the vertical direction, but at the same distance from the vertical dividing line (T1) andf. three contacts (3, 5, 7) of size (B1) are arranged in one half of the contact carrier, which is divided by the vertical dividing line (T1) from the other half of the contact carrier.

Description

The invention relates to an adapter plug and connector for electrically conductive contacting of a printed circuit board with at least one additional electrical component having at least one contact for conducting electricity within the adapter plug and a specific interface.

A large number of different solutions are used for contacting or establishing electrically conductive connections between printed circuit boards or with other electrical, electronic and current-carrying components or elements. Depending on the contacting task, required additional functions and different requirements and application environments, differently designed PCB connectors, stranded wiring, detachable socket contact plugs in different geometric configurations or cable-based power supply concepts are used.

From the DE 10 2018 132 440 A1 discloses an adapter plug and connector for electrically conductive contacting of a circuit board with at least one additional electrical component, having at least one contacting device for conducting current within the adapter plug.

A multi-piece PCB connector situation shows the DE 10 2009 058 616 B4 . This connector, designed for contacting circuit boards arranged in parallel, consists of a first and a second connector part with contact elements which are aligned with one another and aligned perpendicularly to the circuit boards. The locking device integrated in the connector is also made up of two parts and combines positive and non-positive functional components with corresponding rear grips.

The DE 20 2013 100 330 U1 discloses a modular printed circuit board connector with a base module and a plug-on module. Both modules are designed for attachment to the printed circuit board on the one hand and relative to one another on the other and have coupling means for this purpose so that a flexibly adaptable connector arrangement is supported. Depending on the contacting requirement, the required connector arrangement can be set up in a similar way to a modular system.

If the circuit board connectors are required to be sealed against water and other liquids, multi-part circuit board connectors with sealing elements may be required. The DE 10 2013 002 709 A1 shows a connector for printed circuit boards having a housing with a sealing surface formation and a corresponding sealing element. The PCB connector is supplemented by press-in elements and signal contacts.

Printed circuit boards as part of electronic components are often installed in components and products that are mass-produced in large quantities. Printed circuit boards to be electrically contacted are found, for example, in controls, regulations or electronics of electric motors, household appliances, vehicles, telephones, telecommunications equipment, data processing systems, entertainment electronics and so on. In order to protect these electronic components from external influences and influences, they often have to be installed inside housings, housings or behind covers and lids. These boundary conditions result in a number of requirements with regard to production, assembly and cost-effective construction.

In addition to the requirement for individual parts to be reduced as far as possible in the sense of integrated construction, mass-produced items must ideally be automated both in terms of production and installation or assembly. It is important that the assembly components of automatic machines, gripping devices or robotic devices are designed to be grippable, orientable and positionable. In addition, collision-free movement spaces for the gripping devices with the gripped part or component must be implemented. In the case of printed circuit board connectors, this is regularly a special condition that makes automatic assembly more difficult. The reasons for this are plug-in directions, plug-in location and plug-in distance for realizing the electrically conductive connection. The space for movement is often limited by the arrangement of the printed circuit board in a housing.

The DE 37 23 347 A1 discloses a printed circuit board connector that promotes secure mounting attachment by trunnions having cylindrical portions. The pegs of the fastening parts comprise a first cylindrical area on the circumference of which spring tongues pointing in the axial direction are formed, which are bent to form locking shoulders by means of offsets pointing in the radial direction, with after the insertion of the pegs in a printed circuit board hole the cylindrical area of the Hole is included and the locking shoulders of the tongues snap behind the circuit board. In order to facilitate connector assembly, it is provided that the pins/tongues have a greater overall length than the soldering pins. When placing the connector on the circuit board, a The connector is pre-centered so that the remaining solder pins can be inserted more easily into the corresponding PCB holes. With regard to the required handling or installation space, however, this is disadvantageous in that the space required for assembly is increased.

If the constellation of the side wall mounting of a device plug or plug connector is present, further unfavorable problems can arise. Side wall mounting means the connection of the plug connection on the side edge of the printed circuit board, which means that the plug-in direction is in the printed circuit board level. When plugged in, the plug connector is often in the PCB plane and can protrude beyond the side edge of the PCB. If the printed circuit board is installed in a housing with such a plug constellation that surrounds the side edges of the printed circuit board, the plug connector usually has to be preassembled since the required plug-in space is no longer available after the printed circuit board has been installed in the housing. Pre-assembled connectors can impede the assembly process of the printed circuit board due to the adjacent cables and the side contour of the pre-assembled printed circuit board connector combination, which is enlarged by the connector overhang. A desirable but unresolved need here is to avoid the pre-assembly of the connector and to find an alternative solution.

The so-called AISG connectors are based on the standardized M16 connectors and use the 8-pin variant defined in the standard for e.g. B. but only 4 poles are equipped. The connectors are standardized connectors and define a specific size (similar to the sizes M5, M8, M12, M23, etc...).

However, the installation space is a limiting factor. AISG users have a need to use the existing installation space of a standardized M16 circular connector for all tasks. According to the standards IEC 61984 and IEC 60664 (insulation coordination for electrical equipment in low-voltage systems), the required air and creepage distances, among other things, must be observed. There is also a need to remain backward compatible with existing mating faces and to enable the use of only 4 contact pairs in an AISG-compliant version.

Further functions must therefore be integrated and contacting, as described above, with a printed circuit board (in particular in a housing) should be possible.

It is the object of the invention to achieve the above-mentioned goals with a circular connector of size M16. The object is achieved according to the invention in that on the one hand an at least two-part printed circuit board connector is used, which in a preferred application makes contact with a standard M16 device part via an adapter plug on a printed circuit board and on the other hand an optimized specific interface is provided.

The invention proposes that an adapter plug be used which contacts any standard M16 device part or device parts with such a screw connection, for example a housing screw connection with a printed circuit board. Any number of poles is supported, in particular 8 poles.

The design provides that the adapter plug has special contacts on the connection side of the M16 screw connection, which are designed like a socket on the front and a pin on the back. The contacts are designed as soldering or press-in contacts on the printed circuit board side and as resilient contact sockets on the device plug side, which are electrically conductively connected or realized via a right-angled connection and preferably in one piece.

1. a. drei Kontakte „E, F, G“ der Baugröße B2 liegen auf einer gedachten vertikalen Teilungslinie, die durch den Mittelpunkt (sprich das Zenrum) des runden Kontakteinsatzes verläuft;
2. b. ein Kontakt der Baugröße B1 liegt auf einer gedachten horizontalen Teilungslinie, die senkrecht zur vertikalen Teilungslinie verläuft und ebenfalls durch den Mittelpunkt des runden Kontakteinsatz verläuft;
3. c. zwei Kontakte der Baugröße B1 liegen etwa spiegelbildlich zur horizontalen Teilungslinie;
4. d. zwei Kontakte der kleineren Baugröße B2 liegen diametral gegenüber der vertikalen Teilungslinie mit jeweils gleichem Abstand zur horizontalen Teilungslinie;
5. e. jeweils zwei Kontakte und zwei Kontakte der kleineren Baugröße B2 liegen in Vertikalrichtung übereinander angeordnet jedoch mit jeweils mit gleichem Abstand zur vertikalen Teilungslinie und
6. f. drei Kontakte der Baugröße B1 sind in einer Hälfte des Kontaktträgers angeordnet, der von der anderen Hälfte des Kontaktträgers durch die vertikale Trennlinie geteilt wird.

According to the invention, the following is provided in particular, namely a plug connector and/or an adapter plug for electrically conductive contacting of a printed circuit board with at least one further electrical component, having at least one contact for conducting electricity within the adapter plug, comprising a substantially round contact insert, characterized in that the adapter plug is at least in two parts and is constructed geometrically in such a way that two plug-in planes that are not parallel to one another are formed by the plug-in directions, the plug-in directions being arranged at an angle of approximately 90 degrees to one another and at least two groups of contacts of different sizes being arranged in the contact insert and the first group having four contacts the size and the second group has at least 9 contacts of the smaller size with a contact arrangement which is chosen as follows:

1. a. three contacts "E, F, G" of size B2 lie on an imaginary vertical dividing line that runs through the center (i.e. the center) of the round contact insert;
2. b. a size B1 contact lies on an imaginary horizontal dividing line which is perpendicular to the vertical dividing line and also passes through the center of the round contact insert;
3. c. two size B1 contacts are approximately mirror images of the horizontal dividing line;
4. i.e. two contacts of the smaller size B2 are diametrically opposed to the vertical dividing line, each with the same distance from the horizontal dividing line;
5. e. in each case two contacts and two contacts of the smaller size B2 are arranged one above the other in the vertical direction, but at the same distance from the vertical dividing line and
6. f. Three B1 frame contacts are arranged in one half of the contact carrier divided by the vertical parting line from the other half of the contact carrier.

In an advantageous embodiment of the invention it is provided that the connector or the adapter plug, the four contacts of a size B1 according to 3 shown positions of the shown 8-pin AISG circular connector style A7 (according to the AISG Standard: Antenna Interface Standards Group, Standard No. AISG C485, V1.1 of June 17, 2016) are arranged.

It is also advantageous if the three contacts of size B2 according to feature a) mentioned above are spaced approximately equidistantly from one another by a distance AB1. It is equally advantageous if the contacts arranged in pairs one above the other according to feature e) have approximately the same distance AB1 as these three contacts, which lie on the vertical dividing line.

In a particularly advantageous embodiment of the invention, it is provided that the lowest contact “7” of one size B1 represents a grounding or ground contact or is provided as such a contact.

Furthermore, a recess which is axially symmetrical to the vertical separating line but not horizontally axially symmetrical can advantageously be provided in the contact carrier.

It is further preferred if an approximately U-shaped mounting spring is provided on a section of the adapter plug oriented toward the printed circuit board mounting side, which is mounted from the plug side in the plugging direction and has printed circuit board contacts that extend in the plugging direction. This can improve the fixation on the circuit board.

It is also advantageous if the adapter plug (100) has a plurality of contacts, tongue contact elements in the printed circuit board plug-in direction, the number of which corresponds to the number of poles to be contacted in the contact carrier and are arranged in two parallel plug-in rows, with those contact ends preferably being arranged in one plug-in row which lead to contacts which are arranged on one (upper) half of the contact carrier and those contact ends which lead to contacts which are on the further, d. H. other (lower) half of the contact carrier are arranged.

Further advantageous configurations are explained below. The adapter plug advantageously has socket contacts on the inside on the plug-in side, which are provided with contact pins, pin contacts on the opposite end and thus on the receiving side or connection side. Furthermore, the adapter plug on the connection side to the circuit board is designed in such a way that special contacts reverse the connection direction of the circuit board contact pattern and, with regard to minimum installation space and maximized tolerance, in a plane perpendicular to the circuit board level and - in the mounted situation of the circuit board in the housing - perpendicular to the housing wall in the plugging direction are.

Correspondingly, the contacts and/or the contact areas of the circuit board connector are designed as socket contacts and configured for plugging in the pin contact ends of the appliance connector.

The invention recognizes that a contact insert on the circuit board side of the adapter plug can be designed as a multi-part design, which enables simple assembly even without machine support. A contact insert of the adapter plug is designed in such a way that the contacts are precisely aligned in the plugging direction. In addition to automated assembly using different handling devices, the invention also supports manual assembly and, for this purpose, can optionally prevent erroneous mating geometrically by means of asymmetrical contact arrangements and/or additional features.

As a result of contacting via the adapter plug according to the invention, it is possible to provide particularly favorable initial situations for automated assembly of the contact-making components between printed circuit boards and their contact partners. A possible automated assembly sequence can take place after a printed circuit board assembly in one direction or level in that the adapter plug is already mounted before the printed circuit board is installed. The adapter plug can be designed such that the Plug-in directions of the adapter plug to the circuit board are in spatial directions that differ from one another. For example, a right-angled position is considered in the mounting direction of the device plug, so that the circuit board adapter is mounted in the vertical direction and the M16 connector is mounted in the horizontal direction. Previous solutions provide that the contact on the printed circuit board is made by direct contact with the contact partner. The solution is independent of the thickness of the board or printed circuit board and can therefore be used universally. Also, in this way, required assembly space can be significantly reduced.

The simplified assembly process achieved by the invention supports not only manual but also automated assembly and is suitable for reducing the assembly space required for assembly. This can be used to establish electrical contact even in confined spaces - for example printed circuit boards arranged within electronic housings or smartphones.

Stranded wiring is no longer required when using the proposed adapter plug between the device plug and the circuit board connector or the circuit board. Not only does this circumstance have a cost-reducing effect, but also the independence of the electrical contacting from the circuit board thickness, so that only one adapter plug has to be kept available for the contacting task. If conventional printed circuit board connectors are used in the direct contacting path and/or connectors are provided for use on the side edge of the printed circuit board, these contacting means depend on the thickness of the board or must be adapted to it. The contacting structure according to the invention, on the other hand, is independent of this and can consequently be used for all geometric configurations and thickness variants of the printed circuit boards to be contacted.

• 1a linksseitig die Vorderansicht und rechtsseitig die Seitenschnittdarstellung des Adaptersteckers exemplarisch ausgebildet als 8-poliger Leiterplattensteckverbinder mit zwei zueinander nichtparallelen Steckebenen beziehungsweise Steckrichtungen;
• 1b rechtsseitig die Rückansicht und linksseitig die Seitenansicht des Adaptersteckers;
• 2a linksseitig die Vorderansicht und rechtsseitig die Seitenschnittdarstellung des mit dem in 1 dargestellten Adapterstecker korrespondierenden Steckverbinder als exemplarisch ausgebildeten Rundstecker;
• 2b linksseitig die Seitenansicht und rechtsseitig die Rückansicht des Steckverbinders;
• 3 ein Auszug eines 8 poligen AISG-Rundsteckverbinders Style A7 gemäß dem AISG Standard: Antenna Interface Standards Group, Standard No. AISG C485, V1.1 vom 17. Juni 2016;
• 4 eine Aufsicht auf das Steckgesicht eines erfindungsgemäßen Adaptersteckers;
• 5 eine perspektivische Ansicht eines erfindungsgemäßen Adaptersteckers;
• 6 eine weitere perspektivische Ansicht eines erfindungsgemäßen Adaptersteckers.

The invention is explained in more detail below using two exemplary embodiments in conjunction with the figures, wherein the 1 until 3 represent solutions known from the prior art. show:

• 1a on the left side the front view and on the right side the side sectional representation of the adapter plug designed as an example as an 8-pin circuit board connector with two mutually non-parallel plug planes or plug directions;
• 1b the rear view on the right and the side view on the left of the adapter plug;
• 2a on the left the front view and on the right the side sectional view of the with the in 1 shown adapter plug corresponding connector as an example trained circular connector;
• 2 B the side view on the left and the rear view of the connector on the right;
• 3 an excerpt of an 8-pin AISG round connector style A7 according to the AISG standard: Antenna Interface Standards Group, standard no. AISG C485, V1.1 of 17 June 2016;
• 4 a top view of the mating face of an adapter plug according to the invention;
• 5 a perspective view of an adapter plug according to the invention;
• 6 another perspective view of an adapter plug according to the invention.

The invention is explained in more detail below with reference to the figures, with the same reference symbols in the figures indicating the same structural and/or functional features.

1a shows the front view on the left and the side sectional representation of the adapter plug 100 on the right, designed as an example as an 8-pole printed circuit board connector with two mutually non-parallel plug levels or plug directions SV, SL. In the exemplary embodiment shown, the plug-in levels SL, SV are arranged at right angles to one another. Any other positions are also possible, regardless of the number of poles, for example arrangements that are skewed or deviate from the right-angled orientation. This in 1a The exemplary embodiment shown has an 8-pole contact pattern in an axisymmetric design with respect to the vertical and an asymmetrical design with respect to the horizontal. In this way, both the position and the orientation of the plugged-in position of the adapter plug 100 and the plug connector 110 relative to one another are defined geometrically. Numbers of poles and arrangements that deviate from this are also supported by the invention.

The adapter plug housing is constructed in at least two parts and is formed by a base housing 10 and at least one conductor guide 20. Optionally, the adapter plug housing can be supplemented or completed by a rear wall 30, which is functional with the base housing 10 and/or the conductor guide 20 with regard to locking the inner contacting elements interacts and ensures the rear enclosure. Depending on the plug-in situation and environmental conditions, the rear wall 30 can also be dispensed with. Preferably, the at least two housing elements are intended to be locked by means of a lock reinrichtungen 40 set relative to each other so that a structural unit is formed that supports simplified and reliable manual or automatic handling and assembly. The locking devices can be formed, for example, by snap noses, rear grips or latching hooks so that either a non-positive and/or positive locking is achieved.

1b includes the rear view on the right and the side view on the left of the adapter plug 100. The contacts K, which are electrically conductively connected to the poles P within the adapter plug 100, are designed in such a way that the connection direction is reversed and are designed for the minimum space required and for high tolerance in the plug-in direction SL are.

The adapter plug 100 can also be equipped with at least one plug pin 11 on the circuit board side. The at least one plug pin 11, which is preferably designed in one piece with the adapter plug base housing 10, can be arranged symmetrically or asymmetrically with respect to the plug hole pattern and can have a prismatic or cylindrical cross section. If several plug pins 11 are provided, the plug security and reliability of the plug connection from the adapter plug 100 to the printed circuit board can be increased. Advantageous when using several plug pins 11 is the training in different cross sections, for example round and triangular and polygonal cross sections. In this way, the correct orientation of the adapter plug 100 relative to the printed circuit board is geometrically enforced.

The adapter plug 100 is formed on its circuit board side by a three-part contact insert and is designed in such a way that simple assembly without machine support is made possible. The adapter plug 100 is formed on its connector side by a two-part contact insert and is designed in such a way that the exact alignment of the contacts of the connector 110 for engaging in the poles P is ensured. An additional feature can also optionally be integrated on the plug connector side of the adapter plug 100 in order to avoid incorrect plugging in the sense of the orientation of the plug partners relative to one another.

2a illustrates the front view on the left in the direction of the device plug to be contacted and on the right the side sectional view of the with the in 1 shown adapter plug 100 corresponding plug connector 110 as an example formed round plug here. In a connector housing 111, a contact insert 120 is accommodated in accordance with the adapter plug 100. FIG 1a , 1 b corresponding way has poles P and associated pole pins PS. The poles P are designed as special contacts on the mating side as sockets and are pin-shaped on the back.

The connector housing 111 can optionally have an orientation aid 112 , designed here as a semi-circular recess in the flange area of the connector housing 111 , for example. The contact insert 120 with the poles P and the pole pins PS can optionally also have an orientation aid 122 which prevents incorrect plugging and/or supports a defined position of the contact insert 120 within the connector housing 111.

2 B shows the side view on the left and the rear view of the connector 110 on the right. If the connector 110 is designed as a circular connector as shown, it can be equipped with a thread G) (here: metric internal thread) for security purposes, i.e. via a form-fit connection to the contacting partner corresponding (external) thread GA of the device connector or contacting partner can be screwed.

The 3 shows an excerpt of an 8-pin AISG round plug connector style A7 according to the AISG standard: Antenna Interface Standards Group, standard no. AISG C485, V1.1 of June 17, 2016, with the contacts 3, 5, 6, 7 being incorporated into the connector face according to the invention in order to achieve backwards compatibility with the 4-pin variants. Also shows the 2 B this mating face of the AISG connector. Here, the different views are pointed out in the 3 represent the rear view and at the 4 and 5 each the front view.

1. a. drei Kontakte E, F, G der Baugröße B2 liegen auf einer gedachten vertikalen Teilungslinie T1, die durch den Mittelpunkt M des runden Kontakteinsatz verläuft;
2. b. ein Kontakt 3 der Baugröße B1 liegt auf einer gedachten horizontalen Teilungslinie T2, die senkrecht zur vertikalen Teilungslinie T1 verläuft und ebenfalls durch den Mittelpunkt M des runden Kontakteinsatz verläuft;
3. c. zwei Kontakte 5, 7 der Baugröße B1 liegen etwa spiegelbildlich zur horizontalen Teilungslinie T2;
4. d. zwei Kontakte H, J der kleineren Baugröße B2 liegen diametral gegenüber der vertikalen Teilungslinie T1 mit jeweils gleichem Abstand zur horizontalen Teilungslinie T2;
5. e. jeweils zwei Kontakte A, B und zwei Kontakte C, D der kleineren Baugröße B2 liegen in Vertikalrichtung übereinander angeordnet jedoch mit jeweils mit gleichem Abstand zur vertikalen Teilungslinie T1 und
6. f. drei Kontakte 6 der Baugröße B1 sind in einer Hälfte des Kontaktträgers angeordnet, der von der anderen Hälfte des Kontaktträgers durch die vertikale Trennlinie T1 geteilt wird.

In the 4 and 5 views are shown with the design according to the invention. An adapter plug 100 for electrically conductive contacting of a printed circuit board with at least one further electrical component is shown in each case, having at least one contact P, K for conducting electricity within the adapter plug 100, comprising a substantially round contact insert, characterized in that the adapter plug 100 has at least two parts and is geometric in this way is constructed so that two plug-in planes that are not parallel to one another are formed by the plug-in directions SV, SL, with the plug-in directions SV, SL being arranged at an angle of approximately 90 degrees to one another, and with at least two groups of contacts P of different sizes B1, B2 being arranged in the contact insert and wherein the first group has four contacts 3, 5, 6, 7 of size B1 and the second group has at least 9 Contacts A, B, C, D, E, F, G, H, J of the smaller size B2 with a contact arrangement chosen as follows:

1. a. three contacts E, F, G of size B2 lie on an imaginary vertical dividing line T1, which runs through the center point M of the round contact insert;
2. b. a contact 3 of size B1 lies on an imaginary horizontal dividing line T2, which runs perpendicular to the vertical dividing line T1 and also runs through the center point M of the round contact insert;
3. c. two contacts 5, 7 of size B1 are approximately mirror images of the horizontal dividing line T2;
4. i.e. two contacts H, J of the smaller size B2 lie diametrically opposite the vertical dividing line T1, each at the same distance from the horizontal dividing line T2;
5. e. in each case two contacts A, B and two contacts C, D of the smaller size B2 are arranged one above the other in the vertical direction, however, in each case at the same distance from the vertical dividing line T1 and
6. f. three contacts 6 of size B1 are arranged in one half of the contact carrier which is divided from the other half of the contact carrier by the vertical dividing line T1.

The dividing lines T1, T2 represent dividing lines aligned orthogonally to one another through the center M of the round contact carrier. This divides the contact carrier into four cake-like segments or into two halves depending on which of the dividing lines T1 or T2 is taken as a basis.

Executed below towards the circuit board side, there is an asymmetrical recess "AUS" in the contact carrier and an approximately U-shaped mounting spring 30 on a section of the adapter plug 100 oriented towards the circuit board mounting side.

On the circuit board connection side, the contacts of both sizes are arranged in two parallel plug-in rows S1, S2, with those contact ends preferably being arranged in one plug-in row S1 that lead to contacts that are arranged on one (upper) half of the contact carrier and in the other Plug row S2 the other contacts.

Claims (9)

Adapter plug (100) for electrically conductive contacting of a printed circuit board with at least one additional electrical component, having at least one contact (P, K) for conducting electricity within the adapter plug (100), comprising a substantially round contact insert, the adapter plug (100) having at least two parts and such is constructed geometrically, the two mutually non-parallel mating planes are formed by the mating directions (SV, SL), the mating directions (SV, SL) being arranged at an angle of about 90 degrees to each other and with at least two groups of contacts (P) in the contact insert of different sizes (B1, B2) and wherein the first group has four contacts (3, 5, 6, 7) of size (B1) and the second group has at least 9 contacts (A, B, C, D, E, F , G, H, J) of the smaller size (B2) with a contact arrangement selected as follows: a. three contacts (E, F, G) of size (B2) lie on an imaginary vertical dividing line (T1) which runs through the center point (M) of the round contact insert; b. a contact (3) of size (B1) lies on an imaginary horizontal dividing line (T2) which runs perpendicular to the vertical dividing line (T1) and also runs through the center point (M) of the round contact insert; c. two contacts (5, 7) of size (B1) are approximately mirror images of the horizontal dividing line (T2); i.e. two contacts (H, J) of the smaller size (B2) are diametrically opposed to the vertical dividing line (T1) with the same distance from the horizontal dividing line (T2); e. two contacts (A, B) and two contacts (C, D) of the smaller size (B2) are arranged one above the other in the vertical direction, but at the same distance from the vertical dividing line (T1) and f. three contacts (3, 5, 7) of size (B1) are arranged in one half of the contact carrier, which is divided by the vertical dividing line (T1) from the other half of the contact carrier. Adapter plug (100) according to claim 1 , characterized in that the four contacts (3, 5, 6, 7) of a size (B1) according to 3 shown same-named positions of the 8-pin AISG circular connector are arranged. Adapter plug (100) according to claim 1 or 2 , characterized in that the three contacts (E, F, G) of size (B2) according to feature a) of claim 1 are spaced approximately equidistantly from one another by a distance AB1. Adapter plug (100) according to claim 3 , characterized in that the pairs arranged one above the other contacts according to feature e). claim 1 roughly the same distance AB1 like the three contacts (E, F, G). claim 3 . Adapter plug according to one of the preceding Claims 1 until 4 , characterized in that the bottom contact (7) of a size (B1) represents a grounding or ground contact or is provided as such a contact. Adapter plug according to one of the preceding claims, characterized in that a recess (AUS) which is axisymmetric to the vertical dividing line (T1) but is horizontally asymmetrical is provided in the contact carrier. Adapter plug according to one of the preceding claims, characterized in that an approximately U-shaped mounting spring (30) is provided on a section of the adapter plug (100) oriented towards the printed circuit board mounting side, which is mounted from the plug side in the plugging direction (SV) and has printed circuit board contacts , which extend in the plug-in direction (SL). Adapter plug (100) according to one of the preceding claims, characterized in that the adapter plug (100) has a plurality of contacts, tongue contact elements (K) in the printed circuit board plug-in direction (SL), the number of which corresponds to the number of poles to be contacted in the contact carrier and in two parallel plug-in rows (S1, S2) are arranged, with those contact ends preferably being arranged in one plug-in row (S1) which lead to contacts which are arranged on one (upper) half of the contact carrier and those contact ends arranged in the other plug-in row (S2). are, which lead to contacts that are arranged on the further, ie other (lower) half of the contact carrier. Adapter plug (100) according to one of the preceding claims, characterized in that the contacts (K) of the contact insert are angled and socket contacts are provided on the connector side (SV) of the adapter plug (100) for connection to the connector pins of the device plug.

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