Electrical switch box system, slide-in rail and motor vehicle

Abstract

Electrical switch box system (10) comprising: - an electrical switch box (16) with a connector piece (24) for forming an electrical plug connection in conjunction with a connector counterpart (26) and with a guide device (28) for guiding a slide-in strip (12) in a connection plane (30) of the plug connection; - the insertion strip (12) for insertion into the guide device (28), wherein the insertion strip (12) comprises a printed circuit board element (32) and the connector counterpart (26) for forming the electrical plug connection in conjunction with the connector piece (24), wherein the connector counterpart (26) is arranged on a printed circuit board element end face (34) located at the front in an insertion direction (14), wherein the insertion strip (12) extends in an insertion plane (36) arranged in the connection plane (30) in the inserted state, wherein the printed circuit board element (32) is wedge-shaped in the insertion direction (14) by means of at least one inclined printed circuit board element side (38) extending obliquely to the insertion plane (36); and - a connector wedge element (18) for thermal connection with the printed circuit board element (32), wherein the connector wedge element (18) is wedge-shaped by means of a connector wedge element slant side (42) that can be applied to the slant side (38) of the printed circuit board element and is supported in the inserted state by means of a support device (22) of the electrical switch box (16) on a connector wedge element side surface (44) opposite the connector wedge element slant side (42), characterized by the fact that: a) the connector wedge element (18) is movably mounted in and / or opposite to the insertion direction (14); and / or b) the connector wedge element (18) has a surface structure (56) for receiving particles at at least one contact surface (54).

Description

[0001] The invention relates to an electrical switch box system. The invention further relates to a slide-in strip and a motor vehicle.

[0002] In modern control cabinets or control boxes for driver assistance systems in motor vehicles, electrical and / or thermal contact of printed circuit boards (PCBs) is desirable. Therefore, when inserting a mounting rail with a PCB and a connector strip into a control cabinet, damage to an existing thermal pad should be avoided. Furthermore, it is desirable that, when inserting the mounting rail, the pins of the connector strip fit as precisely as possible into the mating connector in the control cabinet. The PCB should also be connected to a cooling system (e.g., water) with as few gaps as possible over the thermal pad when the mounting rail is inserted.

[0003] To ensure a gap-free connection between the circuit board and the cooling system, the circuit board should be subjected to a force in the direction of the cooling system. Furthermore, to ensure that all connector pins align as precisely as possible with their mating connectors in the control cabinet, the mounting rail should be guided as straight as possible along a guide rail in the control cabinet.

[0004] With conventional cabinet systems, the thermal pad can be damaged when the mounting rail is inserted and the desired force is applied towards the cooling system. Due to spacing tolerances between the mounting rail and the cooling system, it can also happen that the center axis of the connector pins, located in a mounting plane of the mounting rail, does not align precisely with the center axis of the mating connector in the control cabinet, with the center axis of the mating connector being located in a connection plane of the connector. This can cause the contact to be subjected to lateral force and thus be damaged.

[0005] Various solutions to these problems include, for example, parallel displacement of the slide rail and the mating connector in the control cabinet during insertion to create a force-free gap for the thermal pad, or angled insertion of the insertion strip followed by lifting and locking by means of a mechanism.

[0006] However, such solutions require a high degree of care and verification after the insertion of the plug-in strip. These systems can therefore lead to errors, potentially limiting thermal connectivity or causing damage to the contacts of the plug strip and its mating connector in the control cabinet. Consequently, the service life of the control cabinet system may be reduced with such solutions.

[0007] US patent 2017 / 0027083A1 discloses a slide-in strip with a printed circuit board element having a first inclined side that is complementary to a second inclined side of a cooling plate.

[0008] DE 10 2007 049 035 A1 discloses a chip cooling device with a wedge element.

[0009] US Patent 2021 / 0 109 574 A1 discloses a power supply unit designed to be inserted into a slide-in box, wherein the power supply unit has a slanted side that is complementary to a slanted side of the cold plate of the slide-in box. The cold plate is movable orthogonally to an insertion direction.

[0010] DE 10 2010 025 085 A1 discloses a housing with a contacting unit in the housing, wherein the contacting unit is designed with several electrical plug devices.

[0011] Furthermore, DE 10 2009 020 390 B3 and US 9 877 405 B2 represent state of the art.

[0012] The invention aims to create an improved electrical switch box system.

[0013] To solve this problem, the invention provides an electrical switch box system according to claim 1. A slide-in strip and a motor vehicle are the subject of the dependent claims.

[0014] Advantageous embodiments are the subject of the dependent claims.

[0015] In one respect, the invention creates an electrical switch box system comprising: - an electrical switch box with a connector piece for forming an electrical plug connection in conjunction with a connector counterpart and with a guide device for guiding a slide-in strip into a connection plane of the plug connection; - a slide-in strip for insertion into the guide device, wherein the slide-in strip comprises a printed circuit board element and a connector counterpart for forming the electrical plug connection in conjunction with the connector piece, wherein the connector counterpart is arranged on a printed circuit board element end face located at the front in an insertion direction, wherein the slide-in strip extends an insertion plane arranged in the connection plane in an inserted state, wherein the printed circuit board element is wedge-shaped in the insertion direction by means of at least one inclined side of the printed circuit board element extending obliquely to the insertion plane; and - a connector wedge element for thermal connection to the printed circuit board element, wherein the connector wedge element is wedge-shaped by means of a connector wedge element slant side that can be applied to the slant side of the printed circuit board element and is supported in the inserted state of the insertion strip by means of a support device of the electrical switch box on a connector wedge element side surface opposite the connector wedge element slant side, wherein: a) the connector wedge element is movably mounted in and / or opposite to the insertion direction; and / or b) the connector wedge element has a surface structure for receiving particles on at least one contact surface.

[0016] An advantage of the invention is that, when the insertion strip is inserted, a gap initially exists between the circuit board element and the connector wedge element and / or between the connector wedge element and a support device of the electrical control box for supporting the side surface of the connector wedge element. This initially prevents any lateral force from being exerted on the components, particularly on any thermally conductive pad that may be present, thus reducing or preventing damage to these components during insertion. Once the insertion strip is inserted, the connector wedge element is supported by the support device, creating a lateral force that ensures a thermal connection, i.e., thermal coupling, particularly through direct contact or direct contact of the inclined surfaces.As explained below, the support device can be a cooling device for the electrical switch box.

[0017] The mobility of the connector wedge element allows it to conform to the circuit board element with as little tolerance as possible when being inserted.

[0018] If a thermal pad is present, small amounts of pad debris may be generated during insertion. A surface structure on the connector wedge element captures this debris, thereby improving the thermal connection.

[0019] It is preferred that the connector wedge element is arranged on the printed circuit board element as part of the insertion strip and / or is designed as part of the electrical switch box.

[0020] The connector wedge element can be designed as part of the insertion strip and / or as part of the electrical control box. In both cases, the connector wedge element can be arranged in such a way as to reduce the risk of incorrect insertion.

[0021] It is preferred that the connector wedge element side surface runs parallel to the insertion plane or the connection plane.

[0022] By aligning the connector wedge element's side surface parallel to the insertion plane or connection plane, transverse forces that could potentially cause incorrect insertion can be avoided. The lateral support force is optimally transferred to the connector wedge element and the circuit board in the inserted state due to this parallel alignment.

[0023] It is preferred that the electrical switch box system includes a spring element for generating a spring force directed opposite to the insertion direction and acting on the connector wedge element.

[0024] A spring element, when inserted, can generate an additional force in the opposite direction to the insertion. This ensures that the thermal connection remains intact even when the electrical switchgear system is subjected to vibrations. Furthermore, vibrations can be dampened.

[0025] It is preferred that the spring element is arranged on a connector wedge element end face located at the front in the insertion direction.

[0026] The spring element can be positioned on either the front or rear end face of the connector wedge element (in the insertion direction). A frontal position allows the spring element to be enclosed within the electrical switch box system, which can reduce the risk of the spring element slipping.

[0027] It is preferred that the printed circuit board element has a printed circuit board element side surface arranged opposite the inclined side of the printed circuit board element and running parallel to the insertion plane.

[0028] The printed circuit board element side surface advantageously runs parallel to the insertion plane, so that damage to the connector piece and the counterpart connector piece is avoided during insertion and the insertion plane is always arranged in the connection plane during insertion.

[0029] It is preferred that the connector wedge element comprises a thermally conductive material.

[0030] An advantage of the invention is that the connector wedge element can be made of and / or consist of a thermally conductive material. This enables thermal dissipation of heat from the circuit board element to the cooling system.

[0031] It is preferred that the electrical switch box has a cooling device as a support device for cooling the printed circuit board element.

[0032] The thermal connection between the connector wedge element and the circuit board element allows a cooling device to be thermally connected to the connector wedge element as a support device, which can cool the circuit board element.

[0033] It is preferred that the connector wedge element is designed for thermal connection with the support device or the cooling device, is arranged between the printed circuit board element and the support device or the cooling device and / or is designed to create a thermal connection between the printed circuit board element and the support device or the cooling device.

[0034] To ensure that the cooling connection is not interrupted or restricted, a thermal connection should preferably also be created between the connector wedge element and the cooling device.

[0035] It is preferred that the cooling device has a cooling device side surface that runs parallel to the connection plane of the plug connection.

[0036] If the cooling device's side surface runs parallel to the connection plane of the plug connection, the lateral force is optimally transferred to the connector wedge element. Furthermore, the connector wedge element can also make full and thermal contact with the cooling device's side surface, thus improving the thermal connection.

[0037] For further advantages of the invention, reference is made to the following part of the description.

[0038] According to a further aspect, the invention provides a slide-in strip for insertion into a guide device of an electrical switch box, wherein the slide-in strip comprises a printed circuit board element and a connector counterpart for forming an electrical plug connection in conjunction with a connector piece, wherein the connector counterpart is arranged on a printed circuit board element end face located at the front in an insertion direction, wherein the slide-in strip comprises an insertion plane arranged in a connection plane of the plug connection in an inserted state, wherein the printed circuit board element is wedge-shaped in the insertion direction by means of at least one inclined side of the printed circuit board element extending obliquely to the insertion plane, wherein the slide-in strip comprises a connector wedge element arranged on the printed circuit board element for thermal connection with the printed circuit board element.wherein the connector wedge element is wedge-shaped by a connector wedge element slant side that can be applied to the slant side of the printed circuit board element, complementary to the printed circuit board element.

[0039] The invention also includes further developments of the insertion strip according to the invention, which have features already described in connection with the further developments of the electrical switch box system according to the invention. For this reason, the corresponding further developments of the insertion strip according to the invention are not described again here.

[0040] According to another aspect, the invention creates a motor vehicle with an electrical switch box system and / or a slide-in strip according to one of the preceding embodiments.

[0041] Preferably, the electrical switch box system and / or the insert strip is designed as part of a driver assistance system for the motor vehicle.

[0042] The motor vehicle according to the invention is preferably designed as a motor vehicle, in particular as a passenger car or truck, or as a passenger bus or motorcycle.

[0043] The invention also includes combinations of the features of the described embodiments. The invention therefore also includes realizations that each exhibit a combination of the features of several of the described embodiments, provided that the embodiments have not been described as mutually exclusive.

[0044] The following are exemplary embodiments of the invention described. This is illustrated by: Fig. 1 an embodiment of an electrical switch box system when inserting a slide-in strip in an insertion direction; Fig. 2 an embodiment of a connector wedge element of the electrical switch box system; Fig. 3 the electrical switch box system with the insertion strip in a inserted state; and Fig. 4 an embodiment of a contact surface of the connector wedge element.

[0045] The exemplary embodiments described below are preferred embodiments of the invention. In these exemplary embodiments, the described components each represent individual features of the invention, which can be considered independently of one another and each further develops the invention independently. Therefore, the disclosure is intended to include combinations of features of the embodiments other than those shown. Furthermore, the described embodiments can also be supplemented by further features of the invention already described.

[0046] In the figures, identical reference symbols denote functionally equivalent elements.

[0047] Fig. Figure 1 shows an embodiment of an electrical switch box system 10 when a slide-in strip 12 is inserted into a slide-in direction 14.

[0048] The electrical switch box system 10 comprises an electrical switch box 16, the insertion strip 12, a connector wedge element 18 and a spring element 20.

[0049] The electrical switch box 16 has a cooling device 22 as a support device and a connector piece 24 for forming an electrical plug connection in conjunction with a plug connector counterpart 26. Furthermore, the electrical switch box 16 has a guide device 28 for guiding the insertion strip 12 into a connection plane 30 of the plug connection. The guide device 28 can be designed as a slide rail or the like.

[0050] The insertion strip 12 is designed for insertion into the guide device 28. The insertion strip 12 has a printed circuit board element 32 and the connector counterpart 26 for forming the electrical plug connection in conjunction with the connector piece 24 of the electrical switch box 16. The connector counterpart 26 is arranged on a printed circuit board element end face 34, which is located at the front in the insertion direction 14.

[0051] The insertion strip 12 further comprises an insertion plane 36 arranged in the connection plane 30 when inserted. The printed circuit board element 32 has a slanted side 38 extending obliquely to the insertion plane 36. This gives the printed circuit board element 32 a wedge shape in the insertion direction 14. Opposite the slanted side 38, a printed circuit board side surface 40 extending parallel to the insertion direction 14 is arranged. During insertion, the printed circuit board side surface 40 rests against the guide device 28.

[0052] The connector wedge element 18 is designed for thermal connection to the printed circuit board element 32. For this purpose, the connector wedge element 18 has an inclined side 42 that can be placed against the inclined side 38 of the printed circuit board element. This gives the connector wedge element 18 a wedge shape that is complementary to the printed circuit board element 32.

[0053] Fig. Figure 2 shows an embodiment of the connector wedge element 18 of the electrical switch box system 10. In this embodiment, the spring element 20 is arranged on a connector wedge element end face 46 located at the front in the insertion direction 14. However, the concept also includes embodiments in which the spring element 20 is arranged on the electrical switch box 16. A connector wedge element side face 44 runs parallel to the insertion direction 14. The connector wedge element 18 is designed to establish a thermal connection between the printed circuit board element 32 and the cooling device 22. For this purpose, the connector wedge element 18 comprises or consists of a thermally conductive material, for example, a metal such as aluminum.

[0054] Reference will again be made to Fig. 1 taken.

[0055] The cooling device 22 is designed to cool the printed circuit board element 32. For this purpose, the cooling device 22 has a cooling device side surface 48 extending parallel to the connection plane 30. Water, for example, can be used as a coolant.

[0056] When inserting, there is initially a gap 50 between the cooling device side surface 48 and the connector wedge element side surface 44.

[0057] Fig. Figure 3 shows the electrical switch box system 10 with the insertion strip 12 in a inserted state.

[0058] The connector wedge element 18 is supported, when the insertion strip 12 is inserted, by a side surface 44 of the connector wedge element opposite its inclined side 42. This creates a lateral force that ensures the thermal connection between the connector wedge element 18 and the circuit board element 32. A support device is provided to support the side surface 44 of the connector wedge element. In this case, the support device is the cooling device 22, but according to the concept, it can also be implemented by other components of the electrical switch box 16.

[0059] The connector wedge element 18 is furthermore movably mounted in and opposite to the insertion direction 14. In the case of the Fig. 1 and Fig. In the embodiment shown in Figure 3, the connector wedge element 18 is formed on the circuit board element 32 as part of the insertion strip 12. However, the concept also encompasses embodiments in which the connector wedge element 18 is formed as part of the electrical switch box 16. For example, the connector wedge element 18 can be formed as part of the cooling device 22.

[0060] The spring element 20 is designed to generate a spring force acting opposite to the insertion direction 14 and on the connector wedge element 18. By inserting the insertion strip 12, the angled side 42 of the connector wedge element is thus pressed against the angled side 38 of the printed circuit board element, creating a thermal connection between the connector wedge element 18 and the printed circuit board element 32. Likewise, the side surface 44 of the connector wedge element is pressed against the side surface 48 of the cooling device, creating a thermal connection between the connector wedge element 18 and the cooling device 22. In the inserted state, the side surface 48 of the cooling device thus supports the connector wedge element 18 against the side surface 44 of the connector wedge element. This eliminates the gap 50 and ensures the thermal connection between the connector wedge element 18 and the cooling device 22.

[0061] Preferably, the gap 50 disappears only when the insertion strip 12 is fully inserted.

[0062] A thermally conductive layer 52 is preferably arranged between the connector wedge element side surface 44 and the cooling device side surface 48. The thermally conductive layer 52 can, for example, comprise a thermal paste. The thermally conductive layer 52 is also preferably arranged between the connector wedge element angled side 42 and the printed circuit board element angled side 38. Since the gap 50 exists between the cooling device side surface 48 and the connector wedge element side surface 44 when the insertion strip 12 is inserted, the thermally conductive layer 52 is not damaged because no lateral pressure is exerted. Likewise, the printed circuit board element 32 is not damaged.

[0063] Fig.Figure 4 shows an embodiment of a contact surface 54 of the connector wedge element 18. The contact surface 54 can be the angled side 42 of the connector wedge element and / or the side surface 44 of the connector wedge element. As can be seen from the figure, the contact surface 54 has a surface structure 56. The surface structure 56 is designed to receive particles, for example, the thermally conductive layer 52. For this purpose, the surface structure 56 has a plurality of recesses 58. The recesses 58 can be formed in the form of tapered grooves 60.

[0064] The invention also includes the insertion strip 12 for insertion into the guide device 28 of the electrical switch box 16, wherein the insertion strip 12 comprises the printed circuit board element 32 and the connector counterpart 26 for forming the electrical plug connection in conjunction with the connector piece 24, wherein the connector counterpart 26 is arranged on the front face 34 of the printed circuit board element in the insertion direction 14, wherein the insertion strip 12 comprises the insertion plane 36 arranged in the connection plane 30 of the plug connection in the inserted state, wherein the printed circuit board element 32 is wedge-shaped in the insertion direction 14 by means of at least one inclined side 38 of the printed circuit board element extending obliquely to the insertion plane 36. The idea also includes further developments of the insertion strip 12 as described above.

[0065] The idea also includes a motor vehicle (not shown) with the electrical switch box system 10 and / or with the insert strip 12. Preferably, the electrical switch box system 10 and / or the insert strip 12 is designed as part of a driver assistance system (not shown) for the motor vehicle.

[0066] One principle of preferred embodiments of the invention can thus be summarized as follows: It is proposed to use a wedge as a connecting element between the insert and the cooling system. For this purpose, the top of the insert is chamfered so that the wedge can be moved in a (figuratively) horizontal direction and always has a contact surface with the insert and a contact surface with the cooling system.

[0067] The connecting element is preferably a connector wedge, for example made of aluminum, with an insertion spring. The top and bottom surfaces of the connector wedge have a low surface roughness.

[0068] The insert preferably has a beveled top surface with low surface roughness.

[0069] In embodiments of this idea, the connector wedge is an integral part of the insert. The connector wedge can thus be a component, i.e., a movable part, of the insert. The insert is therefore initially inserted without contact or friction with the cooling system. The fact that there is initially no contact with the cooling system prevents damage to a thermal pad, reduces the insertion force, and prevents other side effects caused by increased insertion force, such as tilting of the insert and the resulting damage to the connector strip or mating connector.

[0070] The idea may have one, several, or all of the following advantages: • Angular tolerances of the connector wedge (+ / - 0.3°) are easily compensated for by the existing play and elasticity of the slide rail. This ensures a positive or thermal connection of the connector wedge between the insert and the cooling system at all times. • As a form-fitting or thermal system, it contains no gap between the insertion and the connector wedge, nor between the connector wedge and the cooling system. • In the event of vibrations, the connector wedge spring ensures that the connector wedge is guided, preventing the thermal connection between the insert and the cooling system from breaking. This makes this thermal connection more robust against vibrations and aging compared to conventional connections, especially those with a thermal pad. • The positive-locking or thermal connection of the insert, connector wedge, and cooling system reduces vibrations of the insert. Vibrations could damage sensitive electronic components, which is avoided in the present invention. • The positive or thermal connection reinforces the integrity of the control box. It also stiffens the structure of the control box, thus protecting the solder joints of the mating connectors in the distribution circuit board inside the control box and thereby increasing its service life. • Simple, grease-based thermal pastes are sufficient as lubricants for the connector wedge. These are well suited for this purpose. • Since the connector wedge itself is metallic (aluminum), this thermal connection ensures a very low thermal resistance between the insert and the cooling system. • Ideally, the wedge has grooves on both sides that are suitable for accommodating particles, so that thermal bonding is always ensured.

[0071] Overall, the examples demonstrate how a reliable, easy-to-manufacture thermal connection between a circuit board of a driver assistance system and a cooling system in an electrical switch box can be provided. Reference symbol list: 10 Electrical switch box system 12 Insert strip 14 Insertion direction 16 electrical switch boxes 18 connector wedge element 20 spring element 22 Cooling device 24 connector pieces 26 Connector counterpart 28 Guide system 30 Connection level 32 printed circuit board elements 34 Circuit board element end face 36 Insertion level 38 PCB element - slant side 40 printed circuit board element side surface 42 Connector wedge element - slanted side 44 Connector wedge element side surface 46 Connector wedge element end face 48 Cooling device side surface 50 gap 52 Thermal conductivity layer 54 Contact area 56 Surface structure 58 Exclusion 60 grooves

Claims

[1] Electrical switch box system (10) comprising: - an electrical switch box (16) with a connector piece (24) for forming an electrical plug connection in conjunction with a connector counterpart (26) and with a guide device (28) for guiding a slide-in strip (12) in a connection plane (30) of the plug connection; - the insertion strip (12) for insertion into the guide device (28), wherein the insertion strip (12) comprises a printed circuit board element (32) and the connector counterpart (26) for forming the electrical plug connection in conjunction with the connector piece (24), wherein the connector counterpart (26) is arranged on a printed circuit board element end face (34) located at the front in an insertion direction (14), wherein the insertion strip (12) extends in an insertion plane (36) arranged in the connection plane (30) in the inserted state, wherein the printed circuit board element (32) is wedge-shaped by at least one inclined side (38) of the printed circuit board element extending obliquely to the insertion plane (36) in the insertion direction (14); and - a connector wedge element (18) for thermal connection with the printed circuit board element (32), wherein the connector wedge element (18) is wedge-shaped by means of a connector wedge element slant side (42) that can be applied to the slant side (38) of the printed circuit board element and is supported in the inserted state by means of a support device (22) of the electrical switch box (16) on a connector wedge element side surface (44) opposite the connector wedge element slant side (42), characterized by , that: a) the connector wedge element (18) is movably mounted in and / or opposite to the insertion direction (14); and / or b) the connector wedge element (18) has a surface structure (56) for receiving particles at at least one contact surface (54). [2] Electrical switch box system (10) according to claim 1, characterized by, that the connector wedge element (18) is arranged on the printed circuit board element (32) as part of the insertion strip (12) and / or is designed as part of the electrical switch box (16). [3] Electrical switch box system (10) according to one of the preceding claims, characterized by that the connector wedge element side surface (44) runs parallel to the insertion plane (36) or connection plane (30). [4] Electrical switch box system (10) according to one of the preceding claims, characterized by a spring element (20) for generating a spring force directed opposite to the insertion direction (14) and acting on the connector wedge element (18). [5] Electrical switch box system (10) according to claim 4, characterized by , that the spring element (20) is arranged on a connector wedge element end face (46) located at the front in the insertion direction (14). [6] Electrical switch box system (10) according to one of the preceding claims, characterized by, that the printed circuit board element (32) has a printed circuit board element side surface (40) arranged opposite the inclined side (38) of the printed circuit board element and running parallel to the insertion plane (36). [7] Electrical switch box system (10) according to one of the preceding claims, characterized by , that the connector wedge element (18) comprises a thermally conductive material. [8] Electrical switch box system (10) according to one of the preceding claims, characterized by , that the electrical switch box (16) has a cooling device (22) as the support device (22) for cooling the circuit board element (32). [9] Electrical switch box system (10) according to claim 8, characterized by, that the connector wedge element (18) is designed for thermal connection with the cooling device (22), is arranged between the printed circuit board element (32) and the cooling device (22) and / or is designed to create a thermal connection between the printed circuit board element (32) and the cooling device (22). [10] Electrical switch box system (10) according to claim 8 or 9, characterized by , that the cooling device (22) has a cooling device side surface (48) running parallel to the connection plane (30) of the plug connection. [11] Insertion strip (12) for insertion into a guide device (28) of an electrical switch box (16), wherein the insertion strip (12) comprises a printed circuit board element (32) and a connector counterpart (26) for forming an electrical plug connection in conjunction with a connector piece (24), wherein the connector counterpart (26) is arranged on a printed circuit board element end face (34) located at the front in an insertion direction (14), wherein the insertion strip (12) comprises an insertion plane (36) arranged in a connection plane (30) of the plug connection in an inserted state, wherein the printed circuit board element (32) is wedge-shaped by at least one inclined side (38) of the printed circuit board element extending obliquely to the insertion plane (36) in the insertion direction (14), wherein the insertion strip (12) includes a connector wedge element (18) arranged on the printed circuit board element (32) for thermal connection including the printed circuit board element (32),wherein the connector wedge element (18) is wedge-shaped by means of a connector wedge element inclined side (42) which can be applied to the printed circuit board element inclined side (38) complementary to the printed circuit board element (32). [12] Motor vehicle with an electrical switch box system (10) according to one of claims 1 to 10 and / or with a slide-in strip (12) according to claim 11.

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