DE102024106851A1 - Connection and electronics module with a circuit board - Google Patents

Abstract

A connection and electronics module, in particular a series-connection and electronics module, with a disk-like and/or block-like structure, having the following features: an electronics housing which is open at least on one connection side and in which a printed circuit board (6) is accommodated, which printed circuit board has a row of printed circuit board edge contacts (61) in an edge region directed towards the connection side, at least one connection unit (7) which is movable relative to the electronics housing in and against a contacting direction (P), which connection unit has contact tulips (73) corresponding to the printed circuit board edge contacts (61) on a contact side for contacting the printed circuit board edge contacts (61), wherein the printed circuit board edge (64) with the printed circuit board edge contacts (61) is assigned a wear protection strip (51) which is connected upstream of the printed circuit board edge (64) in the contacting direction (arrow P), and wherein the wear protection strip (51) is formed integrally with the electronics housing (5).

Description

The invention relates to a connection and electronic module according to the preamble of claim 1.

The state of the art is referred to DE 10 2011 051 154 A1 This document discloses a bus-capable, stackable connection and electronics module for controlling and/or monitoring technical processes and/or for industrial and/or building automation, having a disk-like and/or block-like structure, which is designed to be combined with other connection and electronics modules to form a connection system. The connection and electronics module has at least the following features: at least one base terminal support for fastening to a mounting base, at least one electronics housing that can be placed on the base terminal support and has at least one printed circuit board provided with an electronic circuit, at least one or more bus conductor contacts for forwarding at least one power and/or data bus in the stacking direction to adjacent, stacked connection and electronics modules, and a connection unit pivotably attached to the base terminal support, which on the one hand has a connection level with connections for connecting external conductors and on the other hand has a printed circuit board edge connector with contact tulips for connecting to electrically conductive contacts in the edge region of the printed circuit board.

These connection and electronic modules have proven themselves to be effective, but repeated contacting and detaching of the circuit board edge with the circuit board edge connector can result in relatively high wear on the circuit board edge, which is made of a material with a high glass fiber content and is relatively prone to wear, and possibly also on the contact tulip, which must be reduced.

In order to prevent excessive wear of a circuit board edge and the conductive contacts provided there in the edge area of the circuit board, US 9,893,441 B2 It has been suggested that at least the edge with the conductive contacts be covered with a protective strip. This strip serves to widen the terminal contact tulips before contacting the circuit board, thus counteracting excessive wear on the circuit board edge and the terminal contact tulips. This solution needs to be further improved.

Based on this prior art, the object of the invention is to implement the protection of the edge of the printed circuit board and the contact areas provided there in the edge area as well as, if possible, the contacts of the printed circuit board edge connector against excessive wear during repeated contact in a simple manner in a generic module.

The invention solves this problem by the subject matter of claim 1.

Advantageous embodiments of the invention can be found in the subclaims.

According to claim 1, the following object is created: a connection and electronics module, in particular a series-connection and electronics module, with a disk-like and/or block-like structure, with at least the following features: an electronics housing open at least on one connection side, in which a printed circuit board is accommodated, which has at least one row of printed circuit board edge contacts on a printed circuit board edge facing the connection side, and at least one connection unit movable relative to the electronics housing in and against a contacting direction, which connection unit has contact tulips corresponding to the printed circuit board edge contacts on a contact side for contacting the printed circuit board edge contacts, wherein the printed circuit board edge with the printed circuit board edge contacts is assigned a wear protection strip, which is arranged upstream of the printed circuit board edge in the contacting direction and is formed integrally with the electronics housing. In this way, the printed circuit board edge is well protected in a particularly simple manner when the printed circuit board contact areas are contacted by the connection unit, wherein the protective strip is formed securely and firmly on the electronics housing. Complex pre-machining of the PCB edge with a milling tool or similar, which would otherwise create a tapered edge, is eliminated. Furthermore, the process of (raw) PCB production is kept within the normal process, thus minimizing costs and process lead times.

According to a preferred embodiment, it can advantageously be provided that the wear protection strip is integrally connected to the rest of the electronics housing via one or preferably several connecting webs. This design is particularly easy to manufacture and ensures a particularly good fit of the protective strip.

It is expedient and preferred if the protective strip extends transversely to the circuit board over its entire width or that it is wider than the circuit board transversely to its main extension plane, so that the contact tulips are widened sufficiently when placed on the circuit board that they do not have to come into contact with the actual edge of the circuit board.

According to a further preferred embodiment, it can also be expediently provided that the protective strip tapers away from the edge of the circuit board, whereby a uniform and easy widening of the contact tulips can be ensured when contacting the circuit board.

According to a further preferred embodiment, it can be provided that the contact tulips have contact legs which are slightly convex on their opposite inner sides facing the circuit board in such a way that the contact tulip touches the contact areas of the circuit board essentially in a point-like or linear manner in the area of a contact point of the convex inner sides of the contact legs which is closest to the contact areas.

The wear protection strip can run parallel to the edge of the circuit board.

It can then be further advantageously provided - and this is an advantageous development of claim 1 and the dependent claims related thereto, but also in combination with the preamble of claim 1 and optionally one of the further dependent claims, a further advantageous invention - that the protective strip, in the areas in which the contact tulips brush past it when placing and removing the connection unit on and from the electronics housing, has a series of recesses that correspond to the contact areas and the contact tulips on the edges of the protective strip, such that the contact tulips, when brushing past the protective strip, do not touch this protective strip with the respective contact point, but rather at one or more predetermined grinding points provided laterally for this purpose. In this way, the contact tulips, in particular in the area of the actual contact points, are also very well protected against wear as a result of wiring or loosening the contact.

This embodiment can be advantageously optionally further developed in that the protective strip is at least as wide or wider than the circuit board even in the area of the deepest point of the recesses perpendicular to the circuit board.

Then the wear protection strip could run parallel to the edge of the circuit board and it could be held positively to the housing, especially against the contact direction.

According to a further preferred embodiment, it can also be expediently provided that the protective strip consists of the same insulating plastic material as the electronics housing and is manufactured together with the latter in a plastic injection molding process, wherein the insulating plastic material is preferably a harder material than that from which the printed circuit board is made.

The invention is suitable both for configurations in which the connection unit is arranged pivotably relative to the electronics housing, as well as for those in which it is arranged displaceably relative to the electronics housing

Before describing preferred embodiments, it should be noted that some preferred embodiments are described in detail below. However, the invention is not limited to these embodiments, but can be varied as desired within the scope of the claims. In particular, terms such as "top", "bottom", "front" or "rear" are not to be understood as limiting, but refer merely to the respective arrangement shown. Furthermore, where individual components are explained, these are - unless stated otherwise - generally conceivable in multiple embodiments. The scope of protection also includes kinematic inversions of the arrangements shown.

• 1a-c in 1a eine Seitenansicht eines ersten Anschluss- und Funktionsmoduls, in welcher eine schwenkbare Anschlusseinheit auf einem eine Leiterplatte aufweisenden Gehäuse in eine erste Offenstellung verschwenkt ist, in 1b eine erste Schnittansicht senkrecht zur Ebene der 1a entsprechend eine oberen Linie E-F, in welchem die schwenkbare Anschlusseinheit auf einem eine Leiterplatte aufweisenden Gehäuse in die zweite, weitere Offenstellung verschwenkt ist und in 1c eine weitere Schnittansicht, senkrecht zur Ebene der 1a entsprechend der unteren Linie E-F, in welchem die schwenkbare Anschlusseinheit auf dem die Leiterplatte aufweisenden Gehäuse in die erste weniger weite Offenstellung der 1a verschwenkt ist;
• 2a-c in 2a eine weitere Seitenansicht des ersten Anschluss- und Funktionsmoduls, in welcher die schwenkbare Anschlusseinheit in eine Geschlossenstellung verschwenkt ist, in 2b eine erste Schnittansicht senkrecht zur Ebene der 2a entsprechend der oberen Linie E-F, in welchem die schwenkbare Anschlusseinheit wiederum in eine weitere Offenstellung verschwenkt ist und in 2c eine weitere Schnittansicht, senkrecht zur Ebene der 2a entsprechend der unteren Linie E-F, in welchem die schwenkbare Anschlusseinheit in die Geschlossenstellung verschwenkt ist;
• 3a-c in 3a eine weitere Seitenansicht des ersten Anschluss- und Funktionsmoduls, in welcher die schwenkbare Anschlusseinheit in eine noch weitere Offenstellung verschwenkt ist, in 3b eine Schnittansicht durch das Modul aus 3a parallel zur Bildebene der 3a; und in 3c eine Ausschnittsvergrößerung des Bereiches B aus 3b;
• 4a-c in 4a eine perspektivische Ansicht des ersten Anschluss- und Funktionsmoduls, in welcher die schwenkbare Anschlusseinheit in die Offenstellung der 4a verschwenkt ist, in 4b eine Ausschnittsvergrößerung eines Bereiches aus 4a; und in 4c den Bereich aus 4b aus einer anderen Perspektive betrachtet;
• 5 eine Seitenansicht eines einstückig ausgebildeten Kontaktes mit einer Leiterplattenrandkontakttulpe und mit einem Leiteranschlusskontakt;
• 6 eine perspektivische Ansicht des ersten Anschluss- und Funktionsmoduls entsprechend zu 4a, wobei in das Gehäuse keine Leiterplatte eingesetzt ist; und
• 7 eine Skizze eines Randes einer Verschleißschutzleiste, an welcher in einem geöffneten Zustand der Anschlusseinheit eine Leiterplattenrandkontakttulpe anliegt.

The invention is described in more detail below with reference to an exemplary embodiment and the drawing. It shows:

• 1a -c in 1a a side view of a first connection and function module, in which a pivotable connection unit on a housing having a printed circuit board is pivoted into a first open position, in 1b a first sectional view perpendicular to the plane of 1a corresponding to an upper line EF, in which the pivoting connection unit on a housing having a printed circuit board is pivoted into the second, further open position and in 1c another sectional view, perpendicular to the plane of the 1a corresponding to the lower line EF, in which the pivoting connection unit on the housing containing the printed circuit board is in the first less wide open position of the 1a is pivoted;
• 2a -c in 2a a further side view of the first connection and function module, in which the pivotable connection unit is pivoted into a closed position, in 2b a first sectional view perpendicular to the plane of 2a corresponding to the upper line EF, in which the pivoting connection unit is again pivoted into a further open position and in 2c another sectional view, perpendicular to the Level of 2a corresponding to the lower line EF, in which the pivoting connection unit is pivoted into the closed position;
• 3a -c in 3a a further side view of the first connection and function module, in which the pivoting connection unit is pivoted into an even further open position, in 3b a sectional view through the module 3a parallel to the image plane of the 3a ; and in 3c an enlarged section of area B from 3b ;
• 4a -c in 4a a perspective view of the first connection and function module, in which the pivoting connection unit is in the open position of the 4a is pivoted in 4b an enlarged section of an area 4a ; and in 4c the area 4b viewed from a different perspective;
• 5 a side view of a one-piece contact with a circuit board edge contact tulip and with a conductor connection contact;
• 6 a perspective view of the first connection and function module according to 4a , where no circuit board is inserted into the housing; and
• 7 a sketch of an edge of a wear protection strip, against which a circuit board edge contact tulip rests when the connection unit is open.

The invention is explained below using an exemplary connection and electronics module that can be used for controlling and/or monitoring technical processes and/or for industrial and/or building automation. The term "connection and electronics module" is to be understood as meaning that, on the one hand, conductors can be connected to a printed circuit board. The type of electronic circuitry on this printed circuit board is not essential within the scope of this invention. It can, for example, have signal processing electronics or simply conductor tracks connected to bus contacts or the like.

For example, connection modules can be provided that serve solely to connect external devices via a conductor or plug connection. Typically, both connection functions for external devices or their conductors as well as other, particularly electronic, functions (e.g., signal processing) are implemented.

The connection and function modules are arranged in a row direction X perpendicular to the image plane of the 1a , see also 1b and 1c They can be arranged in series, optionally forming overarching buses that can be connected to a higher-level controller directly or, for example, via a gateway. However, the invention is also suitable for electronic modules that do not form such buses.

1a shows a side view of an electrical connection and electronics module 1 that can be placed—in particular snapped—on a mounting base such as a support rail T extending in the Y direction and arranged in series with other modules on the mounting base, as could be used, for example, as part of control systems in automation technology. Application-specific combinations of a gateway and such connection and electronics modules 1 enable the monitoring and/or control of external electrical devices (field devices, initiators, actuators, etc.) that can be connected to the connection and electronics modules 1 of the connection system according to the invention.

The 1 and 2 The connection and function module 1 shown has a base terminal support 2 which is provided with fixing means, here with locking means 3, 4, for snapping onto a mounting rail (not shown here).

However, the invention is not limited to such a configuration. It is also suitable for stackable connection and electronic modules 1 that can be mounted on a mounting base other than a mounting rail, for example, a wall or the like.

An electronics housing 5 ( 1a) with at least one or more circuit boards 6 ( 1b and 1c or 3b) placed or attachable, which in turn can be equipped with electrical contacts, in particular circuit board edge contact 61 (hereinafter also referred to as contact areas 61 for short), as well as with components. A circuit board edge contact 61 is understood to be a contact arranged in the edge region, e.g., in the form of a contact surface, which can be contacted with a circuit board edge connector. The circuit board edge contact 61 can, but does not have to, extend exactly to the corresponding edge of the circuit board 6.

Within the scope of the invention, the base terminal carrier 2 and the electronics housing 5 could also be combined to form a single or multi-piece unit (not shown).

The printed circuit board 6 has two main sides 62, 63, which extend in the Y and Z directions, which here are exemplified perpendicular to the alignment direction are aligned, which is advantageous but not mandatory. The circuit board 6 also has a circumferential circuit board edge 64. The electronics housing 5 has an open upper side. The circuit board edge 64 with the circuit board edge contacts 61 is accessible on this side, so that the circuit board edge contacts 61 are accessible and contactable. In the exemplary embodiment of the attached figures, the circuit board edge contacts 61 are arranged one behind the other in a row along the upper circuit board edge 64 in the Z direction. They can be arranged one behind the other in this row in the Y direction close to this circuit board edge 64 on one or, in particular, opposite one another on both main surfaces 62, 63 of the circuit board.

A connection unit 7 is in turn mounted on the base terminal support 2 and the electronics housing 5. This unit has a connection housing 71 in which a plurality of conductor terminals 72 arranged in a row are formed for connecting external conductors or connectors or the like.

These conductor connections 72 can be designed using various connection technologies, e.g., tension spring connection, IDC connection, or screw connection. This list is not exhaustive. Other connection technologies, such as plug connections, are also possible. These conductor connections 72 are preferably - but not necessarily - designed as direct plug-in connections (push-in, see 5 ) which can be contacted without the need for tools simply by inserting a conductor into a terminal area of the connector. In the contacted state, a clamping leg of the push-in connector clamps the conductor in a clamping cage against a busbar ( 5 ).

The connection unit 7 further comprises circuit board edge contact tulips 73 (also referred to synonymously as contact tulips 73 in the application). The contact tulips 73 are designed to overlap one of the edges 64 of the circuit board 6 or to receive a circuit board edge 64 between their two contact legs 731 and 732, wherein they then each contact at least one of the circuit board edge contacts 61.

The conductor terminals 71 and the contact tulips 73 can be conductively connected to one another in one piece and formed as a single metallic element. However, they can also be formed in multiple pieces and connected only indirectly, e.g., via electrical or electronic components (not shown).

The electronics housing 5 and the connection unit 7 or the base terminal support 2 and the connection unit 7 can be pivotally connected in a joint area, so that the connection unit 7 can be pivoted in open positions (see 1a , 2a , 3a , 4a) with different opening angles α and can be pivoted into a closed position (cf. 2a) . It is also conceivable that the connection unit 7 is arranged displaceably relative to the electronics housing 5 (for example in 1a from top to bottom and back on corresponding sliding guides of the base terminal support 2 (not shown). The connection unit 7 and its connection housing 71 serve to close the electronics housing 5 upwards, whereby in the closed position (see 2a) the circuit board edge contacts 61 are contacted by the contact tulips 73.

Both the base terminal support 2 and the electronics housing 5 as well as the connection unit 7 can have a substantially disc-like structure and can be perpendicular to the plane of the 1a be able to be arranged in series and preferably also be able to be coupled mechanically and electrically.

The electronics housing 5 has a geometry adapted to the geometry of the base terminal carrier 2. The printed circuit board 6 can optionally contact contacts of this base terminal carrier 2 when placed on the base terminal carrier 2 (not shown here).

Due to the selected design, the connection unit 7 can be pre-wired and is simply opened and then closed again in the event that the electronics unit or the electronics housing 5 with the circuit board 6 needs to be mounted or replaced.

In order to protect the circuit board edge 64 and the circuit board edge contacts 61 and preferably also the circuit board edge contact tulips 73 against wear during contacting and detaching, it is provided that adjacent to the circuit board edge 64, which is here exemplary in the Z direction and on which the circuit board edge contacts 61 are formed, a wear protection strip 51 is assigned to the circuit board edge 64, which wear protection strip 51 is arranged on the circuit board edge 64 in the contacting direction (arrow P in 1a) or here in the swiveling direction (arrow P) is also connected upstream.

This wear protection strip 51 (hereinafter also referred to as a protective strip) is preferably formed in one piece with the electronics housing 5. This means that the protective strip 51 can be integrally molded onto the electronics housing 5. It can be connected to it, for example, via one or preferably several connecting webs 53 (see in particular also 4a) integral with the rest of the electronics housing This type of manufacturing is reliable, simple, and cost-effective.

In 4 An alternative method of securing the protective strip 51 is also indicated. Optionally, it can additionally or alternatively be secured positively in the housing 5. Here, this is achieved by a pin 54, which holds the strip down from above into a recess 55 in the same. The pin 54 can be arranged on a lever element that serves to release the electronics housing and/or the circuit board 6.

The protective strip 51 is preferably made of the same insulating plastic material as the electronics housing 5 and is manufactured together with it using a plastic injection molding process. This insulating plastic material is a different material than the material from which the printed circuit board 6 is made, in particular a harder material, and in particular, it has no or a much lower glass fiber content than the material of the printed circuit board 6.

In 1c The protective strip 51 is shown in cross-section. The protective strip 51 is preferably designed such that it extends transversely to the circuit board 6 (here in the Z direction) across the entire width or substantially the entire width of the circuit board edge 64. It is particularly preferably provided that the protective strip 51 is slightly wider than the circuit board 6 perpendicular to the circuit board 6 on its side facing the circuit board 6. The protective strip 51 can taper away from the circuit board edge 64 in the Z direction. It also extends in a strip-like manner parallel to the circuit board edge 64 along the edge.

In this case, the protective strip 51 is not connected to the circuit board 6, but rests against it. When contact is made, the circuit board edge contacts 61 press the protective strip 51 onto the edge of the circuit board edge 64. When pivoting back, the connecting webs 53 prevent the protective strip 51 from lifting off the circuit board edge 64 and thus protect the protective strip 51 from deformation and damage. If one of the circuit board edge contact tulips 73 reaches the protective strip 51 when the connection unit 7 is pivoted onto the electronics housing in the direction of the circuit board edge 6, this contact tulip 73 is widened as the connection unit 7 is pivoted further when the protective strip is slipped over and, in this expanded state, reaches the circuit board edge contacts 61 without the actual circuit board edge 64 having to widen the contact tulip 741. The protective strip 51 thus serves to reduce the wear of the circuit board edge 64. It also does not need to have a tapered contour at the edge to ensure that the contact tulips 73 widen, which would normally only be formed by reworking the circuit board edge.

Preferably, the contact tulips 73 are on their inner sides facing the circuit board 6 of the contact legs 731, 732 (see the sketch of the 7 ) is shaped somewhat convexly in such a way that the contact tulip 73 only touches the contact areas 61 of the printed circuit board 6 in a point-like or linear manner in a contact point 7311 of the convex inner surfaces 62 closest to the contact areas 61. In this case, in order to optimize the wear protection, it can be provided that the protective strip 51 has a series of recesses 52 in the areas in which the contact tulips brush past it when the connection unit 7 is pivoted up and down onto and off the electronics housing 5, which recesses correspond to the contact areas 61 and the contact tulips 71 on the edges of the protective strip 51 provided in the X and Z directions (see 3a , 4a , 7 ).

These recesses 52 are arranged and dimensioned in such a way that the contact tulips 73, when passing the protective strip 51, do not touch the protective strip 51 with the contact point(s) 7311, but rather that they pass at least one or here two predetermined grinding points 7312, 7312 provided laterally on the recesses 52 of the protective strip 51 without the contact points touching the protective strip 51.

It is particularly preferred that the protective strip 51 is still as wide or wider (again perpendicular to the circuit board 6) than the circuit board 6 even in the region of the deepest point of the recesses 52.

In this way, a significantly increased protection of the contact tulips 73 is achieved in a surprisingly simple construction when contacting the circuit board contact areas 61 and when detaching the contact tulips 73 from them, since the actual contact points 7311 of the contact tulips 73 can practically not wear out during these processes.

The protective strip 51 can be provided both with pivotable connection units 7 on the electronics housing 5 and with connection units 7 that are slidably guided when attaching and removing the connection block from the electronics housing 5 (the latter not shown). Furthermore, the protective strip 51 can be implemented with connection units 7 that are arranged on a base terminal support 2 as well as with those that are pivotably or slidably arranged directly on the electronics housing 5 (the latter not shown).

Contrary to what is shown, the connection unit can be moved not only to the top edge of the circuit board, but also to a side edge of the circuit board to establish contact there. Within the scope of a kinematic reversal, it would also be conceivable, for example, for the connection unit to be stationary and, for example, formed on the base terminal carrier, and for the electronics housing to be placed on it with the circuit board in a relative movement for contacting.

Reference symbol

1

Connection and electronics module

2

Base terminal carrier

3, 4

Resting aid

5

Electronics housing

51

protective strip

52

Deepenings

53

connecting bridge

54

Pen

55

Deepening

6

circuit board

61

PCB edge contacts

62, 63

Main pages

64

PCB edge

7

Connection unit

71

Junction box

72

Conductor connections

73

PCB edge contact tulips

731 and 732

Contact leg

7311

Contact point

7312, 7312

Target grinding points

T

Mounting rail

P

Arrow

QUOTES CONTAINED IN THE DESCRIPTION

This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 10 2011 051 154 A1 [0002]
• US 9,893,441 B2 [0004]

Claims (11)

Connection and electronics module, in particular a series-connection and electronics module, with a disk-like and/or block-like structure, with the following features: a. an electronics housing (5) which is open at least on one connection side and in which a printed circuit board (6) is accommodated, which printed circuit board has a row of printed circuit board edge contacts (61) on a printed circuit board edge (64) directed towards the connection side, b. at least one connection unit (7) which is movable relative to the electronics housing (5) in and against a contacting direction (P), and which has contact tulips (73) corresponding to the printed circuit board edge contacts (61) on one contact side for contacting the printed circuit board edge contacts (61), c. wherein the printed circuit board edge (64) with the printed circuit board edge contacts (61) is assigned a wear protection strip (51) which is connected upstream of the printed circuit board edge (64) in the contacting direction P), characterized in that d. the wear protection strip (51) is formed integrally with the electronics housing (5). Connection and electronic module according to Claim 1 , characterized in that the wear protection strip (51) is integrally connected to the remaining electronics housing (5) via one or more connecting webs (53). Connection and electronics module according to one of the preceding claims, characterized in that the protective strip (51) extends transversely to the printed circuit board (5) over its entire width or that it is wider than the printed circuit board (6) transversely to its main extension plane. Connection and electronics module according to one of the preceding claims, characterized in that the contact tulips (73) have contact legs (731, 732) which are convexly shaped on their opposite inner sides facing the printed circuit board (6) in such a way that the contact tulip (73) touches the contact areas (61) of the printed circuit board (6) essentially in a point-like or linear manner in the area of a contact point (7311) of the convex inner sides of the contact legs (731, 732) closest to the contact areas (61). Connection and electronic module according to one of the preceding claims or according to the preamble of Claim 1 , especially in connection with one of the Claims 2 until 4 , characterized in that the protective strip (51) has a series of recesses (52) in the areas in which the contact tulips brush past it when the connection unit (7) is placed on and removed from the electronics housing (5), which recesses are formed corresponding to the contact areas 61 and the contact tulips (71) on the edges of the protective strip (51), in such a way that the contact tulips (73) do not touch the protective strip (51) with the respective contact point (7311) when brushing past it, but rather at one or more predetermined grinding points (7312, 7312) provided laterally therefor. Connection and electronics module according to one of the preceding claims, characterized in that the protective strip (51) is at least as wide or wider than the circuit board (6) even in the region of the deepest point of the recesses (52) perpendicular to the circuit board (6). Connection and electronics module according to one of the preceding claims, characterized in that the protective strip (51) tapers away from the circuit board edge (64) on its side facing away from the latter. Connection and electronics module according to one of the preceding claims, characterized in that the protective strip (51) consists of the same insulating plastic material as the electronics housing (5) and is manufactured together with the latter in a plastic injection molding process, the insulating plastic material being a harder material than that from which the printed circuit board (6) is made. Connection and electronics module according to one of the preceding claims, characterized in that the connection unit (7) is arranged pivotably or displaceably relative to the electronics housing (5). Connection and electronics module according to one of the preceding claims, characterized in that the wear protection strip (51) runs substantially parallel to the circuit board edge. Connection and electronics module according to one of the preceding claims, characterized in that the wear protection strip (51) is held in a form-fitting manner by one or more pins (54) on the electronics housing, in particular counter to the contacting direction.