Connection arrangement with two optically coupled circuit carriers

Abstract

The invention relates to a connection arrangement. The connection arrangement has a circuit carrier and a further circuit carrier. The circuit carrier has an interface for communication with the further circuit carrier, and the further circuit carrier has a further interface for communication with the circuit carrier. The interface and the further interface are each an optical interface, which are each designed to transmit a data signal, in particular an optical one, by means of at least one optical fiber. The interfaces of the connection arrangement of the generic type each have a coupling element, which is each connected at least indirectly or directly to the circuit carrier by means of at least one optical fiber.The coupling elements are each designed to be connected to one another opposite one another and to receive an optical data signal from the respective opposite coupling element. In the connection arrangement, at least one coupling element, or both coupling elements, are connected to the circuit carrier or to the further circuit carrier by means of at least one retaining element, wherein the retaining element is particularly resiliently designed to cushion and / or dampen any movement and / or vibration of the coupling element relative to the circuit carrier.

Description

State of the art

[0001] The invention relates to a connection arrangement. The connection arrangement comprises a circuit carrier and a further circuit carrier. The circuit carrier has an interface for communicating with the further circuit carrier, and the further circuit carrier has a further interface for communicating with the circuit carrier. The interface and the further interface are each optical interfaces, each of which is designed to transmit a data signal, in particular an optical one, via at least one optical fiber.

[0002] From DE 10 2005 048 097 A1 a control unit arrangement is known, in particular for a motor vehicle, with assemblies formed in modules, wherein the modules are designed to be at least partially vertically and / or horizontally connectable to one another via standardized connecting devices. Disclosure of the invention

[0003] According to the invention, the interfaces of the connecting arrangement of the type mentioned at the outset each have a coupling element, which is connected to the circuit carrier at least directly or indirectly by at least one optical fiber. The coupling elements are each designed to be connected to one another opposite one another and to receive an optical data signal from the respective opposite coupling element. In the connecting arrangement, at least one coupling element, or both coupling elements, are connected to the circuit carrier, or to the further circuit carrier, by means of at least one holding element, wherein the holding element is in particular designed to be resilient in such a way as to cushion and / or dampen any movement and / or vibration of the coupling element relative to the circuit carrier.

[0004] The circuit carrier is preferably a fiber-reinforced circuit board, more preferably an epoxy resin circuit board, or a ceramic circuit carrier. The ceramic circuit carrier is preferably a ceramic substrate. The substrate is, for example, a DCB substrate (DCB = Direct Copper Bonded), an AMB substrate (AMB = Active Metal Brazed), an IMS substrate (IMS = Insulated Metal Substrate), an LTCC substrate (LTCC = Low-Temperature Cofired Ceramic), or an HTCC substrate (HTCC = High-Temperature Cofired Ceramic). Advantageously, different circuit carriers can be easily connected to one another for signal transmission using the optical coupling elements.

[0005] Advantageously, a secure optical signal connection can be created between the circuit carriers, in particular a board-to-board connection, whereby the circuit carriers can be easily coupled to one another. For example, when joining the circuit carriers to form a circuit carrier assembly, the additional circuit carrier can be connected, in particular plugged, to the circuit carrier, in particular arranged parallel to it or at a predetermined angle. During the assembly of the circuit carriers, the coupling elements can be connected to one another, in particular by snapping them together. Furthermore, tolerances in the positioning of the circuit carriers relative to one another can be compensated for in this way.

[0006] It was also recognized that the optical data signal connection can transmit a high data rate, particularly between 1 gigabit and 10 gigabits per second, between the spaced-apart circuit carriers. For this purpose, the circuit carriers can be spaced apart by, for example, at least two centimeters, at least five centimeters, or more than ten centimeters.

[0007] The optical data signal preferably comprises beam pulses with a wavelength between 800 and 1600 nanometers. A light-emitting diode or a semiconductor laser can advantageously be used as a radiation source in the fiber optic interface.

[0008] The optical fiber is preferably a glass fiber or a polymer optical fiber, in particular PMMA fiber.

[0009] In a preferred embodiment, the coupling elements are each designed to be magnetically connected to one another, with at least one coupling element comprising at least one, in particular permanent-magnetic, magnetic element. Advantageously, when joining the circuit carriers, the coupling elements can thus easily find one another and snap together using the magnetic field coupling.

[0010] The coupling element is preferably made of plastic. The plastic is preferably a thermoplastic, in particular a PMMA plastic (PMMA = polymethyl methacrylate), an ABS plastic (ABS = acrylonitrile butadiene styrene), PES (polyethylene sulfide) or PPS plastic (PPS = polypropylene sulfide), polyethylene plastic, polypropylene plastic, PET plastic (PET = polyethylene terephthalate), PBT plastic (PBT = polybutylene terephthalate), PEEK (PEEK = polyether ether ketone), or polyamide plastic.

[0011] In a preferred embodiment, both coupling elements have a magnetic element. The magnetic element, in particular a ferrite, is preferably arranged buried in the coupling element. The magnetic element is preferably injected into a plastic coupling element. This advantageously allows for a secure magnetic coupling between the coupling elements.

[0012] In a preferred embodiment, the coupling elements are designed to be connected to one another in a rotationally fixed manner radially encircling an optical connection axis. This advantageously allows for a clear association between the coupling elements radially encircling. Furthermore, an optical connection between the coupling elements can also be arranged eccentrically.

[0013] Preferably, at least one coupling element, or both coupling elements, have a projection designed to engage a corresponding recess in the other coupling element. This advantageously allows a clear radial association between the coupling elements to be easily established.

[0014] In a preferred embodiment, the projection is wave-shaped or roof-shaped. This advantageously allows the coupling elements to slide radially into each other, thereby assuming a predetermined radial position relative to each other.

[0015] In a preferred embodiment, the holding element has at least one leg, in particular a support leg, which is designed to be connected to the circuit carrier. Advantageously, the coupling element can thus be movably mounted, in particular pivotably mounted, at a distance from the circuit carrier by means of the resilient leg. Furthermore, a floating mounting of the coupling elements can be formed in this way, in which a joint of the coupling elements is movably mounted between the circuit carriers, which are in particular rigidly connected to one another.

[0016] In a preferred embodiment, the holding element has at least two legs, at least three legs, at least four legs, at least five legs, at least five legs, at least six legs, or only six legs. Advantageously, the holding element can thus be resiliently and firmly connected to the circuit carrier, with the springing being configured either as a torsional spring or as a lateral spring—in particular, acting parallel to a flat extension of the circuit carrier.

[0017] In a preferred embodiment, at least one leg, or all legs, have an S-shaped or C-shaped section. Advantageously, springing can be provided in a direction transverse to the flat extension of the circuit carrier, in particular vertical extension, in addition to or independently of torsion springing.

[0018] In a preferred embodiment, the holding element is designed for plug-in connection to the circuit carrier. For example, the holding element has a plug-in foot designed to engage in a corresponding recess in the circuit carrier. Advantageously, the holding element can thus be plug-in connected to the circuit carrier in a simple manner—particularly by an automatic assembly machine.

[0019] In a preferred embodiment, the holding element is designed for soldering, in particular reflow soldering, and / or THT soldering (THT = through-hole technology) to the circuit carrier. Advantageously, the coupling element can thus be easily and firmly bonded to the circuit carrier together with other electronic components in a common soldering process.

[0020] In a preferred embodiment, the retaining element has a C-shaped receptacle, in particular a holder, retaining section, or clamp, for the coupling element, wherein the coupling element has a groove for engagement with the receptacle. Advantageously, the coupling element can thus be easily plugged into the retaining element.

[0021] In another embodiment, the retaining element has a plug connection designed for positive and / or non-positive engagement with the coupling element. For example, the retaining element has at least one or a plurality of pins designed to engage in corresponding recesses in the coupling element. The retaining element can have recesses in addition to or independently of the previously described pins, with the coupling element having corresponding pins for engaging in the recesses.

[0022] The invention also relates to a method for optically connecting at least two, or only two, circuit carriers arranged in particular parallel to one another. In the method, a coupling element is resiliently connected to one circuit carrier, and another coupling element is resiliently connected to another circuit carrier. Furthermore, in the method, the coupling elements are coupled to one another, in particular magnetically, for optical data transmission between the coupling elements. Advantageously, this allows a simple connection between the circuit carriers to be created, whereby when the circuit carriers are placed one on top of the other, the magnetic coupling elements can easily find one another and snap together.

[0023] The holding element is preferably a metal element, in particular a wire element, or a plastic element. The metal element is preferably formed from an alloy comprising copper and / or iron, or tin. For example, the holding element is a Cu-SN-6 holding element.

[0024] The plastic element is, for example, a plastic element made of a thermoplastic or a thermoset.

[0025] The invention also relates to a control unit with a connection arrangement of the type described above. The control unit is preferably a control unit for a vehicle, in particular a motor vehicle, electric vehicle or hybrid vehicle.

[0026] The control unit is preferably designed to control a driver assistance function, for example a function for autonomous driving or a lane keeping assistant.

[0027] The circuit carrier is preferably designed to perform a main function, and the additional circuit carrier is preferably designed to perform an auxiliary function. The auxiliary function is preferably a redundant main function. Advantageously, a fallback board of a control unit can be formed by means of the additional circuit carrier.

[0028] In another embodiment, the circuit carrier is an inverter for an electrical machine and, for this purpose, has a B6 bridge. The further circuit carrier is preferably designed to control the circuit carrier, in particular control terminals of the B6 bridge. Advantageously, a modularly produced power module can be formed in this way, in which the semiconductor switches of the B6 bridge can be controlled via the fiber optic interface in a way that is immune to EMC interference.

[0029] The invention will now be described below with reference to figures and further exemplary embodiments. Further advantageous embodiments will become apparent from a combination of the features described in the dependent claims and in the figures and description. Fig. 1 shows a connection arrangement with two interconnected circuit carriers, each of which has a coupling element and can thus be coupled to one another, in particular magnetically and resiliently, so that an optical data signal can be transmitted between the circuit carriers by means of the coupling; Fig. 2 shows an embodiment of a connecting arrangement with a C-shaped spring-loaded holding element and a coupling element; Fig. 3 shows an embodiment of a connecting arrangement with a C-shaped resilient holding element which has two resilient spring legs; Fig. 4 shows an embodiment of a connecting arrangement with a C-shaped resilient holding element having a resilient net; Fig. 5 shows an embodiment of a connection arrangement with a C-shaped spring-loaded holding element which has a spring-loaded spring leg with a press-in section for pressing into a printed circuit board.

[0030] Fig. Figure 1 shows an embodiment of a connection arrangement 1. The connection arrangement 1 comprises a circuit carrier 2 and a further circuit carrier 3. The circuit carriers 2 and 3, which in this embodiment are each designed as a printed circuit board, are arranged parallel to one another and connected to one another by means of spacer elements.

[0031] The circuit carrier 2 has an interface 5, which is connected to the circuit carrier by means of a solder or an adhesive. The circuit carrier 3 has an interface 4, which is connected to the circuit carrier 3 by means of a solder or an adhesive. The interfaces 4 and 5 are each designed as an optical interface, for example, a fiber-optic network interface, in particular an SFP interface (SFP = Small Form-Factor Pluggable). The SFP interface is, for example, a QSFP interface or an SFP Plus interface.

[0032] The interface is configured to convert at least one electrical data signal or data stream into an optical data signal or an optical data stream. In this exemplary embodiment, the interface is configured as an optical transceiver and is additionally configured to receive an optical data signal and convert the received optical data signal into an electrical data signal.

[0033] The interfaces 4 and 5 are each connected to a coupling element by means of a fiber-optic connecting line, in particular a polymer-optical fiber. For this purpose, the interface 4 is connected to a coupling element 7 by means of an optical fiber 8. The interface 5 is connected to a coupling element 6 by means of an optical fiber 9. The coupling elements 6 and 7 are each designed to be coupled to one another in such a way that the front ends of the two optical fibers 8 and 9, respectively, are coupled to one another opposite one another, so that an optical data signal 10 can be transmitted, in particular exchanged, between the optical fibers 8 and 9.

[0034] In this exemplary embodiment, the coupling element 7 is designed as a flat, elongated cylinder and has a through-opening for receiving an end section of the optical fiber 8. The coupling element 6 has a through-opening for receiving an end section of the optical fiber 9 and is designed to be coupled to the coupling element 7—in this exemplary embodiment, magnetically and positively—in such a way that the end faces of the optical fibers 8 and 9 are opposite one another.

[0035] In this exemplary embodiment, the coupling element 7 has at least one or two projection regions designed to engage corresponding recesses formed in the coupling element 6. A recess 12 in the coupling element 6 and a projection 11 on the coupling element 7 are shown as examples. The coupling elements 6 and 7 can thus be connected to one another in a rotationally fixed manner, radially encircling an optical connection axis 22.

[0036] In this exemplary embodiment, the coupling elements 6 and 7 are also designed for magnetic coupling. For this purpose, the coupling element 7 has at least one, or in this exemplary embodiment, two permanent magnets, which are designed to interact with corresponding magnetizable or permanently magnetic elements accommodated in the coupling element 6. The permanent magnet is, for example, embedded in the coupling element 7, buried, in particular overmolded. A magnetic element 20 in the coupling element 6 is designated as an example. By means of the magnetic elements 20 and 21, the coupling elements 6 and 7 can easily find each other and, when snapped together, create the fiber-optic connection between the optical fibers 8 and 9.

[0037] In this exemplary embodiment, the coupling element 6 is firmly connected to the circuit carrier 2 by means of at least one spring leg, in this exemplary embodiment by means of two spring legs. The spring leg 13 in this exemplary embodiment is a plastic leg, in particular a thermoplastic, which is connected or molded onto the coupling element 6, which in this exemplary embodiment is formed by a plastic element. In this exemplary embodiment, the spring leg 13 has a fastening foot 15 for fastening to the circuit carrier 2. In this exemplary embodiment, the fastening foot 15 is designed for solder connection, in particular reflow solder connection, to the circuit carrier 2.

[0038] In this exemplary embodiment, the coupling element 7 has at least one or two spring struts, of which a spring strut 14 is designated as an example. The spring strut 14 has a mounting base 16, which is soldered or glued to the circuit carrier 3.

[0039] Fig. 1 also shows a variant of the interface 4, shown in dashed lines, in which the spring strut 14 and the interface 4 are each integrally formed on a connecting arm 26, which connects the interface 4 and the spring strut 14 at a distance from each other. The mounting foot 16 can be omitted in this variant.

[0040] Fig. 1 also shows a variant of the interface 5, shown in dashed lines, in which the spring strut 13 and the interface 5 are each integrally formed on a connecting arm 23, which connects the interface 5 and the spring strut 13 at a distance from each other. The mounting foot 15 can be omitted in this variant.

[0041] In this exemplary embodiment, circuit carriers 2 and 3 are connected to one another at a distance from one another by means of spacers, in particular spacer pins. A spacer 17 is designated as an example. The spacer 17 is connected to the circuit carrier 2 by means of a fastening means 18, in particular a screw, and to the circuit carrier 3 by means of a fastening means 19, in particular a screw. In another embodiment, the spacer 17 can be molded onto a housing and designed to hold the circuit carriers.

[0042] In this exemplary embodiment, the circuit carriers 2 and 3 are designed to be redundant to one another for carrying out a driver assistance function, for example for autonomous driving or as a lane keeping assistant.

[0043] The circuit carrier 2 is designed, for example, to perform a main driver assistance function. An integrated circuit 24 for performing the main driver assistance function is shown as an example.

[0044] In this embodiment, the circuit carrier 3 is designed as a fall-back board and has an integrated circuit 25 which can perform an auxiliary assistance function - in particular redundantly to the integrated circuit 24.

[0045] The integrated circuit 24 and / or 25 is designed in particular as a microprocessor, a microcontroller, an FPGA (FPGA = Field-Programmable-Gate-Array) or an ASIC (ASIC = Application-Specific-Integrated-Circuit).

[0046] The signal connection between circuit boards 2 and 3 can be established via interfaces 4 and 5. Interfaces 4 and 5 can thus advantageously transmit control signals and / or data streams between circuit boards 2 and 3 with a high data transmission rate, particularly between one gigabit per second and ten gigabits per second. The driver assistance function can thus be reliably implemented in the fallback function by circuit board 3.

[0047] In another embodiment, the circuit carrier 2 and the further circuit carrier 3 can form part of an inverter for supplying current to an electrical machine. For this purpose, the circuit carrier 2 can have power semiconductor switches, in particular a B6 bridge, which is designed to control an electrical machine—in particular with pulse width modulation. The circuit carrier 3 can have a control circuit, in particular a gate driver, for controlling the power semiconductors. The signal connection for controlling can be established via interfaces 4 and 5 and the coupling elements 6 and 7.

[0048] Fig. Figure 2 shows an embodiment of a connection arrangement 30. The connection arrangement 30 comprises a circuit carrier 31, with a holding element 34 connected to the circuit carrier 31. The holding element 34 has a fastening foot 35 for connection to the circuit carrier 31. The fastening foot 35 is designed, in particular, for soldering, gluing, or plugging to the circuit carrier 31.

[0049] The holding element 34 has a spring element 32, which in this embodiment is designed as a pin-shaped spring strut. The spring element 32 is made of metal or plastic, for example.

[0050] The spring element 32 is connected to the fastening foot 35 in such a way that the spring element 32 can deflect transversely or with at least one transverse component from the circuit carrier 31.

[0051] A C-shaped holder 33 is integrally formed on the spring element 32. The C-shaped holder 33 has an opening 36 for inserting a coupling element 37. In this embodiment, the coupling element 37 is designed as a cylindrical disc.

[0052] A groove 38 is formed circumferentially on a cylinder wall in the coupling element 37 for engagement with the C-shaped retaining element 33. The coupling element 37 can thus be inserted, in particular clipped, into the C-shaped retaining element 33.

[0053] In this embodiment, an end section 39 of a fiber optic connecting line, previously also called an optical fiber, is connected to the coupling element 37. Using the holding element 34, the fiber optic connecting line 39 can be coupled to another coupling element in a tolerance-compensating manner to establish a gigabit data connection.

[0054] Fig. Figure 3 shows an exemplary embodiment of a connection arrangement 40. The connection arrangement 40 comprises a circuit carrier 41 and a holding element 42, which is connected, in particular, by a material bond, to the circuit carrier 41. In this exemplary embodiment, the holding element 42 has two fastening feet, one of which is designated as fastening foot 49.

[0055] The holding element 42 has two spring legs 45 and 46, which are connected to a C-shaped holding section 43 at a distance from one another. By means of the spring elements 45 and 46, the C-shaped holding section 43 is held resiliently at a distance from the circuit carrier 41, and thus from the mounting feet.

[0056] The C-shaped holding section 43 has an opening 44 for inserting a coupling element - for example the one shown in Fig. 2 shown coupling element 37, or the one in Fig. 1 shown coupling element 6 or 7.

[0057] The spring legs 45 and 46 each have at least one, or only one, meander loop, which is designed to generate a spring effect between the C-shaped holding section 43 and the fastening foot.

[0058] A meander loop 47 is formed into the longitudinal extension of the spring strut 45 as a C-shaped longitudinal section, and a meander curve 48 is formed into the longitudinal extension of the spring strut 46 as a C-shaped longitudinal section. The spring struts 45 and 46 can thus generate a spring effect—in particular as a bending beam—adjacent to the meander curve and transversely to an orthogonal direction on the circuit board 41, in addition to the meander loops 47 and 48, respectively.

[0059] Fig. 4 shows an exemplary embodiment of a connecting arrangement 50. The connecting arrangement 50 comprises a circuit carrier 51 and a holding element 57, which is connected, in particular, by a material bond, to the circuit carrier 51. The holding element 57 has a C-shaped holding section 52, which is operatively connected to the circuit carrier 51 by means of a spring network 54. The spring network 54 has a plurality of intersecting mesh wires, which are integrally connected to one another or are molded onto one another at intersection points of the intersecting mesh wires.

[0060] Of the wire meshes, a wire mesh 55 and a wire mesh 56 crossing with the wire mesh 55 are designated as examples.

[0061] The C-shaped holding section 52 has an opening 53 into which a coupling element - for example the one shown in Fig. 2 shown coupling element 37 or the one in Fig. 1 - is inserted and can be held by the C-arm-shaped holding element 52.

[0062] The coupling element can thus be resiliently connected to the circuit carrier 51 by the C-shaped holding section. By means of the spring network 54, a spring effect can advantageously be generated in three mutually orthogonal spatial directions.

[0063] Fig. 5 shows an embodiment of a connection arrangement 60. The connection arrangement 60 has a circuit carrier 68 and a holding element 61 for holding a coupling element for a fiber optic connection line.

[0064] The holding element 61 has a C-shaped holding section 62, which is integrally formed on a spring leg 64. A meander loop 66 is formed in the spring leg 64, which is designed to generate a springing of the C-shaped holding section 62 transversely to a flat extension of the circuit carrier 68.

[0065] The C-shaped holding section 62 has an opening 63 for receiving a coupling element - for example the one shown in Fig. 2 shown coupling element 37, or the one in Fig. 1 shown coupling element 6 or 7.

[0066] In this embodiment, a press-in section 67 is formed on the spring strut 64 for pressing into an opening 65 in the circuit carrier 68. In this way, the holding element 61 can be pressed into the circuit carrier 68 with minimal effort. The holding element 61 is formed, for example, from a resilient metal, in particular a steel alloy, or a copper alloy, for example CuSn6.

[0067] The Fig. 2, Fig. 3, Fig. 4 and Fig.The holding elements shown in Figure 5 can each be made of metal or plastic. The plastic is, for example, a thermoplastic, in particular a PMMA plastic (PMMA = polymethyl methacrylate), an ABS plastic (ABS = acrylonitrile butadiene styrene), PES (polyethylene sulfide) or PPS plastic (PPS = polypropylene sulfide), polyethylene plastic, polypropylene plastic, PET plastic (PET = polyethylene terephthalate), PBT plastic (PBT = polybutylene terephthalate), PEEK (PEEK = polyether ether ketone), or polyamide plastic. QUOTES CONTAINED IN THE DESCRIPTION

[0000] 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

[0000] DE 10 2005 048 097 A1

[0002]

Claims

[1] Connection arrangement (1, 30, 40, 50, 60) with a circuit carrier (2) and a further circuit carrier (3), wherein the circuit carrier (2) has an interface (5) for communication with the further circuit carrier (3) and the further circuit carrier (3) has a further interface (4) for communication with the circuit carrier (2), wherein the interface (5) and the further interface (4) are each an optical interface, which are each designed to transmit a data signal (10), in particular an optical one, by means of at least one optical fiber (8, 9), characterized byin that the interfaces (4, 5) each have a coupling element (6, 7), which is each at least indirectly connected to the circuit carrier (2, 3) by means of at least one optical fiber (8, 9), and the coupling elements (6, 7) are designed to be connected opposite one another and to receive the optical data signal (10) from the respective opposite coupling element (6, 7), wherein at least one coupling element (6, 7) or both coupling elements (6, 7) are connected to the circuit carrier (2) or to the further circuit carrier (3) by means of at least one holding element (13, 14), wherein the holding element (13, 14) is in particular designed to be resilient in such a way as to cushion and / or dampen a movement and / or an oscillation of the coupling element (6, 7) relative to the circuit carrier (2, 3). [2] Connecting arrangement (1, 30, 40, 50, 60) according to claim 1, characterized bythat the coupling elements (6, 7) are each designed to be magnetically connected to one another and for this purpose at least one coupling element (6, 7) has at least one in particular permanent magnetic magnet element (20, 21). [3] Connecting arrangement (1, 30, 40, 50, 60) according to claim 1 or 2, characterized by that the coupling elements (6, 7) are designed to be connected to one another in a rotationally fixed manner around an optical connecting axis (22) radially. [4] Connecting arrangement (1, 30, 40, 50, 60) according to one of the preceding claims, characterized by that the holding element (13, 14) has at least one leg (13, 14, 32, 45, 46, 64) which is designed to be connected to the circuit carrier (2, 3). [5] Connecting arrangement (1, 30, 40, 50, 60) according to claim 4, characterized by that at least one leg (13, 14, 32, 45, 46, 64) has an S-shaped or C-shaped section. [6] Connecting arrangement (1, 30, 40, 50, 60) according to one of the preceding claims, characterized by that the holding element (61) is designed for plug-in connection with the circuit carrier (2, 3, 31, 41, 51, 61). [7] Connecting arrangement (1, 30, 40, 50, 60) according to one of the preceding claims, characterized by that the holding element (13, 14, 34, 42, 54) is designed for soldering to the circuit carrier (2, 3, 31, 41, 51). [8] Connecting arrangement (1, 30, 40, 50, 60) according to one of the preceding claims, characterized by that the holding element (13, 14, 34, 42, 54, 61) has a C-shaped receptacle, in particular a clamp, holder or holding section for the coupling element (6, 7, 37) and the coupling element has a groove for engagement of the receptacle. [9] Connecting arrangement (1, 30, 40, 50, 60) according to one of the preceding claims, characterized bythat the holding element (13, 14, 34, 42, 54, 61) has at least two or only two legs (13, 14, 32, 45, 46, 64), which each extend between the circuit carrier (2, 3, 31, 41, 51, 61) and the coupling element (6, 7, 37). [10] Method for the optical connection of two circuit carriers (2, 3, 31, 41, 51, 62), in particular arranged parallel to one another, in which a coupling element (6, 7, 37) is resiliently connected to a circuit carrier (2, 3) and a further coupling element (6, 7, 37) is resiliently connected to a further circuit carrier (2, 3) and the coupling elements (6, 7, 37) are coupled to one another, in particular magnetically (20, 21), for the optical data transmission (10) between the coupling elements (6, 7, 37).

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