Electrical engineering unit

Abstract

Electrotechnical assembly (1) comprising a locking arrangement (14) for a plug connection (SV), - wherein the locking arrangement (14) comprises a first plug element (5) with a plurality of contacts (K5) and - wherein the locking arrangement (14) comprises a ribbon cable (7) with a plurality of contacts (K15a - K15e) which are matched to the contacts (K5) of the first plug element (5), - wherein the ribbon cable (7) branches into three arms (16, 17, 18) in a first end section (15), the middle arm (17) forming a tab (19) and the two outer arms (16, 18) converge in front of the tab (19) and form a bracket (20) running around the tab (19), - wherein the first plug element (5) has a slot (21) on a first side surface (5a), which slot extends into a shaft (22) with the contacts (K5), - wherein the first plug element (5) has an undercut (26, 38,39), - wherein, when the plug connection (SV) is closed, the tab (19) of the ribbon cable (7) is received and contacted in the shaft (22) of the first plug element (5), and - wherein, when the plug connection (SV) is closed, the bracket (20) of the ribbon cable (7) engages over the first plug element (5) and, in doing so, engages with at least one bracket section (20b, 20c, 20d) into the at least one undercut (26, 38, 39) of the first plug element (5), characterized in that the first end section (15) of the ribbon cable (7) is fixed to a base (27), wherein the electrotechnical unit (1) comprises a first housing part (3) and a second housing part (4), wherein the base (27) is supported on the first housing part (3), and wherein the first end section (15) of the ribbon cable (7) is arranged between the base (27) and the second Housing part (4) and is fixed or clamped in the z-axis.,

Description

[0001] The invention relates to an electrotechnical unit according to the preamble of claim 1.

[0002] From DE 10 2005 005 705 A1 a contacting means for flexible electrical ribbon cables is known, comprising a plug socket and a plug housing with respective electrical contact elements and an axial receiving opening for the ribbon cable on the one hand and a consumer on the other hand, wherein locking elements engage in recesses of the ribbon cable.

[0003] Furthermore, from JP 2004-22 414 A, an electrical connection device for electrically connecting a first connection target part and a second connection target part is known, wherein the first connector is electrically connected to the first connection target part and the second connection target part has a second connector that is electrically and mechanically detachably fastened to the first connector, comprising a housing that is fastened to a first connection target part; comprising a plurality of conductive contact elements that are arranged while being held by the housing and electrically connected to conductor portions of the first connection target part; wherein the second connector has a plate-shaped connector insertion portion having a plurality of conductive portions that are electrically connected by being inserted into the respective contact elements of the first connector;and wherein a fitting hole for fitting the housing is included and fixed to the housing so that the connector insertion portion does not fall off from the contact element when the housing is fitted into the fitting hole, and wherein a plate-like fixing portion is included for fixing the connector insertion part.;

[0004] From JP H02-79579 U it is known to provide a flexible printed circuit board capable of securely preventing a connection terminal from detaching from a connector without using an adhesive or the like by extending from the vicinity of a tip part to be connected to an insert part for connecting a connector and coming into contact with a part of the connector in the flexible printed circuit board.

[0005] The object of the invention is to propose an electrotechnical assembly in which the ribbon cable is contacted with a plug element forming a contacting means with minimal effort, with minimal effort, easily checkable by visual inspection and with redundant protection against loosening.

[0006] This object is achieved by the characterizing features of claim 1, starting from the features of the preamble of claim 1. Advantageous and expedient developments are specified in the subclaims.

[0007] The electrotechnical assembly comprises a locking arrangement for a plug connection, wherein the locking arrangement comprises a first plug element with a plurality of contacts and a ribbon cable with a plurality of contacts, wherein the contacts of the ribbon cable are matched to the contacts of the first plug element, wherein the ribbon cable branches into three arms in a first end section interacting with the first plug element, wherein the middle arm forms a tab and wherein the two outer arms converge in front of the tab and form a bracket running around the tab, wherein the first plug element has a slot on a first side surface which leads into a shaft with the contacts, wherein the first plug element has an undercut on at least one further side surface,When the plug connection is closed, the tab of the ribbon cable is received and contacted in the slot of the first plug element, and when the plug connection is closed, the bracket of the ribbon cable overlaps the first plug element and engages with at least one bracket section in the at least one undercut of the first plug element. As a result, the ribbon cable can be contacted on the first plug element by simply inserting the tab into the slot of the first plug element with minimal effort. The labor required for this is minimal due to inserting and removing the bracket. The correct connection of the ribbon cable to the first plug element can be easily verified by visual inspection.By overlapping the bracket over the first connector element, a pull-out protection is implemented as a first safeguard, and by engaging the bracket section of the ribbon cable's bracket into the undercut of the first connector element, a further safeguard is provided to prevent the bracket from slipping off the first connector element. The core of the invention is thus a double safeguard for the plug connection between the ribbon cable and the first connector element against unwanted loosening of the connection as a result of static or dynamic loads.

[0008] The three arms of the ribbon cable—namely, the tab formed by the middle arm and the bracket formed by the outer arms—are aligned with their respective upper surfaces. This special geometry makes the ribbon cable particularly easy to manufacture, for example, through a stamping process.

[0009] For the inventive securing of the ribbon cable contacted with the first plug element, the invention provides for the first end section of the ribbon cable to be fixed to the base, wherein the electrotechnical assembly comprises a first housing part and a second housing part, wherein the base is supported on the first housing part and wherein the first end section of the ribbon cable is guided between the base and the second housing part and, for this purpose, is guided or clamped parallel to the circuit board with play. As a result, after the housing parts have been mounted, an additional guide for the ribbon cable is realized, by means of which a position of the ribbon cable is predetermined and thus an undesired detachment of the tab and the bracket of the ribbon cable from the first plug element is prevented.

[0010] In the electronic component, the first connector element can be arranged on a circuit board.

[0011] To form a second safeguard, it can be provided that the first plug element is provided with an undercut on each of the second and third side surfaces, which are opposite one another and are aligned approximately orthogonally to the first side surface, wherein the bracket of the ribbon cable engages over the first plug element when the plug connection is closed and engages with bracket sections in the two undercuts of the first plug element, or the first plug element is provided with an undercut on the fourth side surface, which is opposite the first side surface, wherein the bracket of the ribbon cable engages over the first plug element when the plug connection is closed and engages with a bracket section in the undercut of the first plug element, or the first plug element is provided with an undercut on each of the second, third and fourth side surfaces,The bracket of the ribbon cable overlaps the first connector element when the plug connection is closed, with three bracket sections engaging the three undercuts of the first connector element, or the first connector element is formed with an undercut on the second or third side surface, with the bracket of the ribbon cable overlapping the first connector element when the plug connection is closed, with one bracket section engaging the one undercut of the first connector element. Such undercuts can be easily incorporated into the three mentioned side surfaces of the housing of the first connector element, since these side surfaces do not need to fulfill any additional functions.

[0012] Furthermore, it can be provided to supplement the electrotechnical unit with a base which is arranged in front of the slot of the first plug element, in particular on the circuit board, wherein the first end section of the ribbon cable rests on an upper side of the base after contact between the ribbon cable and the first plug element, wherein the upper side of the base is positioned such that it aligns the ribbon cable to the level of the slot of the first plug element and that the ribbon cable runs in a straight line between the base and the first plug element. This base thus forms an assembly aid, since the tab can be pushed over the base in the direction of the first plug element during assembly, thereby moving the tab of the ribbon cable to a level at which it can slide directly and without deformation into the slot of the first plug element.

[0013] It can also be provided that the first end section of the ribbon cable is designed to be more rigid than the first central section and a second central section of the ribbon cable, which is arranged between the first central section and a second end section of the ribbon cable, wherein the ribbon cable has, in particular, an S-shaped profile in the first and second central sections. A more rigid design of the first section simplifies insertion into the first connector element, as this prevents unwanted kinking of the ribbon cable.

[0014] Furthermore, it can be provided to equip the electrical assembly with a second plug element, wherein the S-shaped course that the ribbon cable has in its two middle sections generates a pushing force that pushes the first end section of the ribbon cable into the shaft of the first plug element, wherein the S-shaped course is enforced by the fixation of the first end section of the ribbon cable to the first plug element and the fixation of the second end section of the ribbon cable to a second plug element against a restoring force of the ribbon cable. Due to this special arrangement orBy clamping the ribbon cable between two connector elements, the connection between the ribbon cable and the first connector element is further secured, as the force exerted by the ribbon cable toward the first connector element counteracts the ribbon cable from detaching from the first connector element. This ensures that the ribbon cable is securely held under both static and dynamic loads, even if the bracket and / or clamp fail.

[0015] Furthermore, the first end section of the ribbon cable and the second end section of the ribbon cable can be aligned approximately at a right angle to one another in the connected state, wherein the second end section of the ribbon cable and the second connector element are designed in particular analogously to the first end section of the ribbon cable and the first connector element. By appropriately arranging the ribbon cable or positioning the two connector elements, by which the ribbon cable is fixed at its ends, and appropriately dimensioning the ribbon cable, an S-shaped configuration of the ribbon cable is enforced, which generates the desired force in the direction of the first connector element.

[0016] A ribbon cable path can also be provided in which the ribbon cable runs in a 180° curve around a first axis running parallel to the slot of the first connector element. Following the 180° curve, the ribbon cable runs, in particular, in a 90° curve opposite the 180° curve, around a second axis aligned parallel to the first axis. The ribbon cable is bent in the 180° curve, in particular toward the circuit board. This path optimally generates the desired force.

[0017] Finally, it may be provided to arrange the circuit board between the first connector element and the second connector element, and to route the ribbon cable, in particular, through an opening in the circuit board. Such an arrangement allows for a particularly compact design.

[0018] For the purposes of the invention, a ribbon cable is understood to be a cable in which several conductors are arranged parallel to one another in a plane and run from a first end section of the ribbon cable to a second end section of the ribbon cable. In particular, the ribbon cable is designed as a foil-like, flexible strip on which the individual conductors are printed. In the area of the end sections, the individual conductors form contacts, which are contacted by contacts of a suitable connector element when establishing a plug connection.

[0019] Further details of the invention are described in the drawing using schematically illustrated embodiments.

[0020] This shows: Fig. 1: shows a sectional side view of an electrical unit; Fig. 2: shows a section through the Fig. 1 shows an electrotechnical unit or a bottom view of a circuit board arranged in the electrotechnical unit; Fig. 3: shows a first variant for Fig. 2; Fig. 4: shows a second variant for Fig. 2 and Fig. 5: shows a third variant for Fig. 3.

[0021] In the Fig. 1 shows an electrical assembly 1 in a sectional side view. To maintain clarity, hatching of the sectioned surfaces has been omitted. The electrical assembly 1 comprises a housing 2, which is composed of a first housing part 3 and a second housing part 4. The electrical assembly 1 further comprises a first plug element 5, a second plug element 6, and a ribbon cable 7 connecting the two plug elements. Finally, the electrical assembly 1 also comprises a circuit board 8, which is arranged on the first housing part 3. The first plug element 5 is soldered onto an underside 9 of the circuit board 8 as an SMD component. The circuit board 8 comprises a further SMD component 10, which is also soldered onto the underside 9 and is designed, for example, as a component without an electrical function or, for example, as an integrated circuit.Furthermore, the circuit board 8 has an opening 32 through which the ribbon cable 7 is guided from a lower space 12 into an upper space 13, with the first connector element 5 being arranged in the lower space 12 and the second connector element in the upper space 13. The special interaction of the ribbon cable 7 and the first connector element 5 forms a locking arrangement 14 for a plug connection SV formed between the ribbon cable 7 and the first connector element 5.

[0022] As from the Fig. 2, which shows a section through the Fig. 1 shown assembly 1 according to the section line II-II or a bottom view of the circuit board 8, a first end section 15 of the ribbon cable 7 branches into three arms 16, 17 and 18, wherein the middle arm 17 forms a tab 19 and wherein the two outer arms 16, 18 converge in front of the tab 19 and form a bracket 20 running around the tab 19. The first plug element 5 arranged on the circuit board 7 has a slot 21 on a first side surface 5a, which slot 21 extends into a shaft 22 with Fig. 1 visible contacts K5. In the Fig. 2, the first plug element 5 is shown cut away in the area of the shaft 22. The contacts K5 interact with contacts K15a to K15e, which are located on the tab 19 of the second end section 15 and are oriented towards the contacts K5. These contacts K15a to K15e are indicated by dashed lines. This also shows how the tab 19 formed by the arm 17 lies in the shaft 22 when it is fully inserted into the first plug element 5. In the Fig. 1 and Fig. In the closed plug connection shown in Figure 2, the tab 19 of the ribbon cable 7 is received in the shaft 22 of the first plug element 5 and contacted. In this position, the bracket 20 formed from the ribbon cable 7 engages over the first plug element 5 and thus forms a pull-out protection 23, which prevents the tab 19 from being pulled out of the shaft 22 of the first plug element 5 in the direction of the arrow x' by the ribbon cable 7 coming into contact with the first plug element 5 with an inner edge 24 of its bracket 20. A further protection 25 of the locking arrangement 14 is formed by an undercut 26, which is arranged on a second side surface 5b of the first plug element 5, wherein the second side surface 5b is opposite the first side surface 5a.In the illustrated closed locking arrangement 14, the ribbon cable 7 dips with a bracket portion 20b of its bracket 20 into the undercut 26 of the first plug element 7. As can be seen from the . Fig. 1, this positive connection between the first connector element 5 and the bracket 20 of the ribbon cable 7 prevents the bracket 20 from detaching in the direction of the arrow z', so that the tab 19 is held securely and reliably in the shaft 22 of the first connector element 5 even when dynamic loads act on the ribbon cable 7 and / or the first connector element 5. By securing the Fig. 1 and Fig. In position A of the ribbon cable 7 shown in Figure 2, its function as a pull-out protection device 23 is ensured even under difficult conditions.

[0023] The first end section 15 of the ribbon cable 7 or upper sides F16, F17, F18 of the arms 16, 17, 18 lie in a common plane E1. This position of the first end section 15 is not only predetermined by the first connector element 5, which receives the tab 19 and positions the bracket 20, but is also favored by the SMD component 10, which forms a base 27. The base 27 initially facilitates the insertion of the tab 19 into the first connector element 5. For this purpose, the tab 19 is inserted into the shaft 22 in an insertion direction indicated by the arrow direction x, wherein the tab 19 is positioned on a surface F27 of the base 27 at a distance a from the circuit board 8 such that the circuit board can slide into the shaft 22 without bending or kinking. This occurs with minimal resistance, since the pairing formed from the ribbon cable 7 and the first plug element is designed according to the invention as a LIF connection or ZIF connection.A low-insertion-force connection is one that requires minimal force to create. A zero-insertion-force connection is one that essentially requires no force to create.

[0024] As can be seen in particular from the Fig. 2, the position of the first end section 15 of the ribbon cable 7 relative to the first connector element 5 or a housing 28 of the first connector element 5 easily indicates the proper connection of the ribbon cable 7 to the first connector element 5, so that this can be easily verified both by an image processing system used for final inspection and by a visual inspection performed by a human. One embodiment of the invention provides for the circuit board, the first end section of the ribbon cable, and the housing of the first connector element to be designed with regard to the material used and / or the color or tint used in such a way that the contrasts created between the components facilitate quality control.

[0025] As from the Fig. 1, the circuit board 8 is fixed to the first housing part 3. By assembling the two housing parts 3 and 4, the first end section 15 of the ribbon cable 7 is clamped between a lug 29 of the second housing part 4 and the base 27. This additionally secures the connection between the ribbon cable 7 and the first connector element 5. This clamping lock 30 acts as a strain relief, whereby the clamping lock 30 only becomes effective once the lower housing part 4 is installed. During the preceding assembly process or when repairing the assembly unit 1, this clamping lock 30 is not active. During this time, safety is ensured by the pull-out lock 23 and the lock 25.According to a variant embodiment not shown, it is also provided to dispense with the clamping lock 30 and to guide the ribbon cable between the nose of the second housing part and the socket with play and thereby align it with the first plug element and thereby keep tensile and shear forces parallel to the circuit board.

[0026] The ribbon cable 7 comprises, in addition to the first end section 15, a first middle section 31, with which it is guided through the opening 32 in the circuit board 8. The first middle section 31 is followed by a second middle section 33 and a second end section 34. The second end section 34 is connected to the second plug element 6, which is fastened to the first housing part 3. The second plug element 6 is provided for receiving a plug (not shown) which is led from an area 35 of the assembly 1. Alternatively, it is also provided to fix the second plug element between two housing parts. The first and second middle sections 31, 33 of the ribbon cable 7 are thinner than the first end section 15, whereby the illustration of the Fig. 1 is to be understood as a schematic representation which does not allow any conclusions to be drawn about the ratio of the thicknesses d15 and d31 or d33. According to the invention, the ribbon cable 7 is designed to be stiffer in the region of the first end section 15 due to the choice of material and / or the dimensioning than in the two middle regions 31, 33. In the middle regions 31, 33, the ribbon cable 7 has an approximately S-shaped course, wherein the first middle region 31 describes an arc B31 running over approximately 180° and the second middle region describes an arc B33 running over approximately 90°, and wherein the arcs B31, B33 run in opposite directions of rotation w, w' about axes A31, A33 which are perpendicular to the plane of the drawing. The axes A31 and A33 are aligned parallel to the slot 21. Due to this approximately S-shaped course of the ribbon cable 7 orThis pre-tensioning of the ribbon cable 7 generates a force acting in the direction of the arrow x on the first end section 15, starting from the second end section 34, which is fixed and supported on the second connector element 6, and pushing the first end section 15 into the first connector element 5. This also prevents unwanted detachment of the ribbon cable 7 from the first connector element 5. The two housing parts 3, 4 are connected to one another at their flanges 36, 37 by connecting means (not shown), such as screws.

[0027] In the Fig. 3 to 5 show three design variants for a positive connection between a ribbon cable 7 and a first connector element. In principle, reference is also made here to the description of the Fig. 1 and Fig. 2.

[0028] In the Fig. 3, the first connector element 5 has an undercut 38, 39 on each of two opposite side surfaces 5c and 5d, into which a bracket 20 of a free end section 15 of the ribbon cable 7 engages with bracket cuts 20c and 20d, respectively, when the ribbon cable 7 is connected to the first connector element 5.

[0029] In the Fig. 4, the first plug element 5 has an undercut 26, 38, 39 on each of three adjacent side surfaces 5b, 5c and 5d, into which a bracket 20 of a free end section 15 of the ribbon cable 7 engages with bracket cuts 20b, 20c and 20d, respectively, when the ribbon cable 7 is connected to the first plug element 5.

[0030] In the Fig.5, the first plug element 5 has an undercut 38 only on one side surface 5c, into which a bracket 20 of a free end section 15 of the ribbon cable 7 engages with a bracket cut 20c when the ribbon cable 7 is connected to the first plug element 5. List of reference symbols: 1 unit 2 housings 3 first housing part 4 second housing part 5 first plug element 5a Side surfaces of 5 or 28 5b Side surfaces of 5 or 28 5c Side surfaces of 5 or 28 5d Side surfaces of 5 or 28 6 second plug element 7 ribbon cables 8 circuit boards 9 bottom of 8 10 SMD components 11 integrated circuit 12 lower room of 1 13 upper room of 1 14 Locking arrangement 15 first final section of 7 16 Arm of 15 17 Arm of 15 18 arm of 15 19 Tab 20 hangers 20b Ironing section 20c ironing section 20d ironing section 21 slot on 5 22 shaft 23 Pull-out protection 24 inner edge of 20 25 Security 26 Undercut on 5b 27 bases 28 cases of 5 29 Nose of 4 30 clamping device 31 first middle section of 7 32 breakthrough in 8 33 second middle section of 7 34 second end section of 7 35 surroundings of 1 36 flange of 3 37 flange of 4 38 Undercut at 5c 39 Undercut on 5d A31 axis of 31 A33 axis of B33 A Position of 7 a distance between 8 and 15 B31 bend around A31 B33 curve around A33 d15 thickness of 15 d31 thickness of 31 d33 thickness of 33 E1 level F16 - F18 Surface of 16, 17, 18 F27 Top of 27 K5 contact of 5 K15a - K15e contacts on 15 SV connector w, w' direction of rotation x, x' arrow direction y' arrow direction

Claims

[1] Electrotechnical unit (1) comprising a locking arrangement (14) for a plug connection (SV), - wherein the locking arrangement (14) comprises a first plug element (5) with a plurality of contacts (K5) and - wherein the locking arrangement (14) comprises a ribbon cable (7) with a plurality of contacts (K15a - K15e) which are matched to the contacts (K5) of the first plug element (5), - wherein the ribbon cable (7) branches into three arms (16, 17, 18) in a first end section (15), the middle arm (17) forming a tab (19) and the two outer arms (16, 18) converge in front of the tab (19) and form a bracket (20) running around the tab (19), - wherein the first plug element (5) has a slot (21) on a first side surface (5a) which leads into a shaft (22) with the contacts (K5), - wherein the first plug element (5) has an undercut (26, 38, 39) on at least one further side surface (5b, 5c, 5d), - wherein, when the plug connection (SV) is closed, the tab (19) of the ribbon cable (7) is received and contacted in the shaft (22) of the first plug element (5) and - wherein, when the plug connection (SV) is closed, the bracket (20) of the ribbon cable (7) engages over the first plug element (5) and engages with at least one bracket section (20b, 20c, 20d) into the at least one undercut (26, 38, 39) of the first plug element (5), characterized byin that the first end section (15) of the ribbon cable (7) is fixed to a base (27), wherein the electrotechnical assembly (1) comprises a first housing part (3) and a second housing part (4), wherein the base (27) is supported on the first housing part (3) and wherein the first end section (15) of the ribbon cable (7) is guided between the base (27) and the second housing part (4) and is fixed or clamped in the z-axis for this purpose. [2] Electrotechnical unit according to claim 1, characterized by that the first plug element (5) is arranged on a circuit board (8) [3] Electrotechnical unit according to claim 1, characterized by that the three arms (16, 17, 18) of the ribbon cable (7), namely the tab (19) formed by the central arm (17) and the bracket (20) formed by the outer arms (16, 18), run with their respective upper sides (F17, F18, F19) in one plane (E1). [4] Electrotechnical unit according to one of the preceding claims, characterized by , - that the first plug element (5) has an undercut (38, 39) on each of the second and third side surfaces (5c, 5d), which are opposite one another and are aligned approximately orthogonally to the first side surface (5a), wherein the bracket (20) of the ribbon cable (7) engages over the first plug element (5) when the plug connection (SV) is closed and engages with bracket sections (20c, 20d) in the two undercuts (38, 39) of the first plug element (5) or - that the first plug element (5) has an undercut (26) on the fourth side surface (5b), which is opposite the first side surface (5a), wherein the bracket (20) of the ribbon cable (7) engages over the first plug element (5) when the plug connection (SV) is closed and engages with a bracket section (20b) in the undercut (26) of the first plug element (5) or - that the first plug element (5) has an undercut (26, 38, 39) on each of the second, third and fourth side surfaces (5b, 5c, 5d), wherein the bracket (20) of the ribbon cable (7) engages over the first plug element (5) when the plug connection (SV) is closed and engages with three bracket sections (20b, 20c, 20d) in the three undercuts (5b, 5c, 5d) of the first plug element (5) or - that the first plug element (5) has an undercut (38, 39) on the second or the third side surface (5c, 5d), wherein the bracket (20) of the ribbon cable (7) engages over the first plug element (5) when the plug connection (SV) is closed and in doing so engages with a bracket section (20c, 20d) into the one undercut (38, 39) of the first plug element (5). [5] Electrotechnical unit according to claim 2, characterized byin that the electrotechnical assembly (1) comprises the base (27), which is arranged in front of the slot (21) of the first plug element (5), in particular on the circuit board (8), wherein the first end section (15) of the ribbon cable (7) rests on an upper side (F27) of the base (27), wherein the upper side (F27) of the base (27) is positioned such that it aligns the ribbon cable (7) to the level of the shaft (22) of the first plug element (5) and the ribbon cable (7) runs in a straight line between the base (27) and the first plug element (5). [6] Electrotechnical unit according to one of the preceding claims, characterized byin that the first end section (15) of the ribbon cable (7) is designed to be stiffer than a first middle section (31) and a second middle section (33) of the ribbon cable (7), which is arranged between the first middle section (31) and a second end section (34) of the ribbon cable (7), wherein the ribbon cable (7) has an S-shaped course in the first and second middle sections (31, 33). [7] Electrotechnical unit according to claim 6, characterized byin that the electrotechnical assembly (1) comprises a second plug element (6), wherein the S-shaped course of the first middle section (31) and the second middle section (33) of the ribbon cable (7), which is enforced by the fixing of the first end section (15) of the ribbon cable (7) to the first plug element (5) and the fixing of the second end section (34) of the ribbon cable (7) to the second plug element (6) against a restoring force of the ribbon cable (7), generates a pushing force which pushes the first end section (15) of the ribbon cable (7) into the shaft (22) of the first plug element (5). [8] Electrotechnical unit according to claim 7, characterized byin that the first end section (15) of the ribbon cable (7) and the second end section (34) of the ribbon cable (7) are fixed in the connected state by the first plug element (5) and the second plug element (6) at approximately a right angle to one another, wherein the second end section (34) of the ribbon cable (7) and the second plug element (6) are designed in particular analogously to the first end section (15) of the ribbon cable (7) and the first plug element (5). [9] Electrotechnical unit according to claims 2 to 8, characterized bythat the ribbon cable (7) makes a 180° bend (B31) around a first axis (A31) running parallel to the slot (21) of the first plug element (5) and that the ribbon cable (7) subsequently makes a 90° bend (B33) opposite to the 180° bend (B31) around a second axis (A33) running parallel to the first axis (A31), wherein the ribbon cable (7) is bent in the 180° bend (B31) in the direction of the circuit board (8). [10] Electrotechnical unit according to claims 2, 7 and 9, characterized by that the circuit board (8) is arranged between the first plug element (5) and the second plug element (6) and the ribbon cable (7) is guided in particular through an opening (32) in the circuit board (8).

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