Circuit body for vehicle

Abstract

Circuit body (1) for a vehicle, which is wired to a vehicle body (2; 2A, 2B) of the vehicle for supplying electrical energy to an electrical component (40) and for communicating various communication signals with the electrical component (40), wherein the circuit body (1) comprises: a plurality of control boxes (10) which are arranged separately on the circuit body (1) and are capable of controlling an input and output of at least one of the electrical energy and the communication signal; a main line wiring harness (20) which connects one of the plurality of control boxes (10) and another of the plurality of control boxes (10);and a branch line wiring harness (30) connecting the control box (10) and the electrical component (40), wherein at least one of the plurality of control boxes (10) is grounded by means of the electrical component (40) connected to the branch line wiring harness (30), and wherein the main line wiring harness (20) is not provided with a ground wire (33) for grounding and the branch line wiring harness (30) has a ground wire (33).

Description

CROSS-REFERENCES TO RELATED REGISTRATIONS

[0001] This application is based on and claims priority of Japanese patent application No. 2017-232891, filed on December 4, 2017, the entire contents of which are incorporated herein by reference. AREA

[0002] One or more embodiments of the present invention relate to a circuit body for a vehicle. BACKGROUND

[0003] For several years, a circuit assembly (so-called wiring harness) has been known for connecting a vehicle-mounted power supply or similar device to various electrical components or similar equipment. Generally, this type of circuit assembly is designed to provide a reliable supply of electrical power from a main power source, such as an alternator (power generator) and a battery, to a large number of electrical components (for example, electronic control units and various auxiliary devices), to enable the switching or interruption of power supply, the transmission of various communication signals, and the like.

[0004] In particular, this type of circuit body (cable harness) is generally formed from a bundle of wires, which is an aggregate of various types of electrical wires connecting a power supply and electrical components, a terminal block for distributing electrical power to a multitude of systems, a relay box for controlling the supply or interruption of electrical power to each system, a fuse box which protects wires and electrical components from excessive current, and the like (see, for example, JP-A-2005-78962). SUMMARY

[0005] For several years now, the structure of wiring harnesses has tended to become more complex, with an increase in the number of electrical components mounted on a vehicle, the complexity of the control systems, and so on. As a consequence, there is an increase in the number of electrical wires forming the harness, an increase in the size of the harness, and so forth, and therefore the weight of the harness tends to increase. With differences in the types of vehicles that require wiring harnesses and an increase in the types of optional electrical components, the types of harnesses to be manufactured have also increased, and the manufacturing process has become more complex, thus tending to increase the manufacturing costs and time required for the harness.

[0006] One or more embodiments of the invention have been made in view of the circumstances described above, and one object of it is to provide a circuit body for a vehicle which has a simplified structure of the circuit body while retaining functions that are required as a circuit body for a vehicle.

[0007] To fulfill the above-described task, the features of a circuit body for a vehicle according to one or more embodiments of the invention are briefly summarized and listed below in (1). (1) A circuit body for a vehicle, which is wired or connected to a vehicle body of the vehicle for supplying or providing electrical energy or current to an electrical component and for communicating various or different communication signals with the electrical component, wherein the circuit body comprises: a large number of control boxes or control units, which are arranged separately on the circuit body and are capable of controlling an input and an output of at least one of the electrical energy and the communication signal; a main line harness (“trunk line harness”) that connects one of the multiple control boxes to another of the multiple control boxes; and a branch line harness that connects the control box and the electrical component, where at least one of the numerous control boxes is grounded by means of the electrical component connected to the branch line cable harness.

[0008] According to the circuit body for a vehicle with the configuration described above in (1), the main line wiring harness and the branch line wiring harness form the frame or basic structure of the circuit body, and the supply of electrical power and the communication signal to the electrical component through the circuit body are controlled by the multitude of control boxes that are arranged separately on the circuit body. Therefore, if, for example, the transmission of communication signals is concentrated in a single signal line by performing multiplex communication between the control boxes, and the power transmission is also concentrated in a power supply line, the structure of the circuit body can be simplified compared to a circuit design of the related technology in which a power source and an electrical component are connected in principle one-to-one.If processes such as the distribution of electrical energy to a multitude of systems, the control of power supply or interruption to each system, the protection of electrical wires and electrical components from excessive electric current, and the like, are carried out in the control box, it is furthermore unnecessary to provide a junction box or the like used in the circuit body of the related technology, and the structure of the circuit body can be further simplified.

[0009] Furthermore, the control box is grounded via a grounding path provided in an electrical component. Even if a ground wire is omitted, for example, from a main wiring harness connecting one control box to another, provided a branch wiring harness connecting another control box to an electrical component contains a ground wire, it is still possible to ground the control box. Consequently, it is possible to omit a ground wire from the main wiring harness, further simplifying the circuit body structure. Additionally, the length of the ground wire can be shortened by omitting a ground wire from the main wiring harness, thus reducing its susceptibility to interference from surrounding noise.

[0010] As described above, according to the circuit body for a vehicle with the design, it is possible to simplify the structure of the circuit body while retaining the functions required as a circuit body for a vehicle.

[0011] According to one or more embodiments of the invention, it is possible to provide a circuit body for a vehicle which has a simplified structure of the circuit body, while retaining the functions required as a circuit body for a vehicle.

[0012] One or more embodiments of the invention are briefly described above. Furthermore, the details of the invention are explained in more detail by reading about a method for carrying out the invention (hereinafter referred to as the "embodiment") described below, with reference to the accompanying drawings. List of characters Fig. Figure 1 is a schematic representation of an embodiment, showing a state in which a cable harness according to a first embodiment of the invention is wired to a vehicle body; Fig. 2A is a perspective view of a main I-type cable harness running between an electrical junction box and an electrical junction box located in Fig. 1 are shown, connects, and Fig. 2B is a cross-sectional view in section along line AA of Fig. 2A; Fig. 3A is a perspective view of an I-type branch cable harness running between an electrical junction box and an electrical component located in Fig. 1 are shown, connects, Fig. 3B is a perspective view of a V-type branch cable harness running between an electrical junction box and an electrical component located in Fig. 1 are shown, connects, and Fig. 3C is a cross-sectional view in section along line BB of Fig. 3A; Fig. 4 is a perspective view of the in Fig. 1 electrical junction box shown; Fig. 5A to Fig. 5C are illustrations to explain a procedure for producing the in Fig. 1 of the depicted cable harness; Fig. Figure 6 is a representation to explain a procedure when a main line cable harness is formed by combining a connector connected to a power supply line and a connector connected to a communication line; Fig. Figure 7 is a schematic embodiment showing a state in which a wiring harness according to a second embodiment of the invention is wired to a vehicle body of a vehicle with a right-side steering wheel specification; Fig. Figure 8 is a schematic embodiment showing a state in which the wiring harness according to the second embodiment of the invention is wired to a vehicle body of a vehicle with a left-side steering wheel specification; Fig. 9A to Fig. 9F are illustrations to explain a procedure for producing the in Fig. 7 and Fig. 8 shown wiring harness; and Fig. 10A to Fig. Figures 10C are perspective views of branch line cable harnesses according to another embodiment of the invention. DETAILED DESCRIPTION First embodiment

[0013] Below is a circuit body (cable harness or wiring set). 1 ) for a vehicle according to a first embodiment of the invention with reference to Fig. 1 to Fig. 6 will be described.

[0014] As in Fig. As shown in 1, the wiring harness 1according to the first embodiment of the invention, used in a state where the wiring harness 1 typically on a vehicle body 2 , on which various electrical components 40 (40A to 40V) are mounted and wired. The wiring harness 1 contains a variety of electrical junction boxes 10 (10a to 10i), main line cable harnesses 20 (20a to 20j), which are located between the electrical junction box 10 and the adjacent electrical junction box 10 electrically connect, and branch line cable harnesses 30 , which are located between the electrical junction box 10 and the adjacent electrical component 40 connect electrically.

[0015] The electrical junction box 10 has a large number of connector receiving holes or openings 11 (see Fig. 4) A connector 23 (see Fig. 2A and Fig. 2B) of at least one main line wiring harness 20 , and a connector 34 (see Fig. 3A to Fig. 3C) of at least one branch line cable harness 30 , are combined with the numerous connector mounting openings 11 from each electrical junction box 10 connected. Thus, every electrical junction box is 10 with at least one other electrical junction box 10 and at least one electrical component 40 connected. The multitude of connector mounting openings. 11 will be described below.

[0016] Each electrical junction box 10 Contains a microcomputer (not shown). Each electrical junction box 10 Refers, using the microcomputer, to ID information held by the other electrical junction box 10 and the electrical component 40are those that are connected via the main wiring harness 20 and the branch line cable harness 30 are connected, whereby the other electrical junction box 10 and the associated electrical component 40 be identified.

[0017] Furthermore, every electrical junction box 10 the associated electrical components 40 controlling using the microcomputer or the like, based on sensor signals, operating or actuation signals and the like, which are supplied by other electrical junction boxes 10 and the electrical components 40 are transmitted via the main line wiring harness 20 and the branch line cable harness 30 are connected. If two or more other electrical junction boxes are connected. 10 via two or more main line cable harnesses 20 Furthermore, every electrical junction box can be connected. 10capable of forwarding the transmission of sensor signals, operating signals and the like to the two or more other electrical junction boxes 10 , and to transmit electrical energy between them.

[0018] As in Fig. Shown as 2A is the main cable harness 20 a so-called I-type cable harness, which includes a power supply line 21 for transmitting electrical energy, a communication line 22 for transmitting sensor signals, operating signals or the like via multiplex communication, and a pair of connectors 23 includes those connected to both ends of a set of power supply lines. 21 and the communications line 22 are connected. The main line wiring harness 20 It is not equipped with a grounding conductor.

[0019] As in Fig. As shown in 2B, the power supply line 21 a conductor wire 21a with a circular cross-section for energy transfer and an insulator made of resin. 21b on, which the conductor wire 21a covered. The communications line 22 shows a pair of electrical wires 22a For signal transmission, a braided conductor or stranded conductor is used. 22b , which connects the pair to electrical wires 22a covered, and an insulator made of resin. 22c on, which the stranded conductor 22b covered. The stranded conductor 22b It has a function of preventing the current from passing through the pair of electrical wires. 22a the transmitted signal is affected by interference noise or signals caused by an external magnetic field or the like.

[0020] The insulator 21b the energy supply line 21 , and the insulator 22cthe communications department 22 , are located throughout the entire area in one direction of extension of the main cable harness 20 through a connecting section made of resin 24 integrated and interconnected. The connector 23 is equipped with a large number of connections (not shown) that connect to the conductor wire 21a and the pair of electrical wires 22a are electrically connected. The pair of connectors 23 , located at both ends of the main cable harness 20 They are each inserted into and connected to the connector receiving openings. 11 the adjacent electrical junction boxes 10 Therefore, the adjacent electrical junction boxes 10 through the main cable harness 20 electrically connected, enabling energy transfer and multiplex communication between the adjacent electrical junction boxes.10 can be carried out.

[0021] As in Fig. Shown as 3A is the branch line cable harness 30 a so-called I-type cable harness, which includes a power supply line 31 for transmitting electrical energy, a communication line 32 for transmitting sensor signals, operating signals or the like via multiplex communication, a ground wire 33 for grounding, and a pair of connectors 34 includes, which are connected to both ends of a set of power supply lines 31 , the communications management 32 and the ground wire 33 are connected. As in Fig. As shown in 3B, the branch line cable harness 30 It would be a so-called V-type wiring harness, in which a connector 34 , which with two sets of the energy supply line 31 , the communications management 32 , and the ground wire 33is connected, is provided on one end side, and has two connectors 34 , each of which is equipped with a set of the energy supply line 31 , the communications management 32 and the ground wire 33 is connected, are provided.

[0022] As in Fig. As shown in 3C, the power supply line 31 a conductor wire 31a with a circular cross-section for energy transfer and an insulator made of resin. 31b on, which the conductor wire 31a covered. The communications line 32 shows a pair of electrical wires 32a for signal transmission, a stranded conductor 32b , which connects the pair to electrical wires 32a covered, and an insulator made of resin. 32c on, which the stranded conductor 32b covered. The stranded conductor 32bIt has a function of preventing the current from passing through the pair of electrical wires. 32a The transmitted signal is affected by interference generated by an external magnetic field or similar. The ground wire 33 has a conductor wire 33a with a circular cross-section for grounding and an insulator made of resin. 33b on, which the conductor wire 33a covered.

[0023] The insulator 31b the energy supply line 31 and the insulator 32c the communications department 32 , and the insulator 32c the communications department 32 and the insulator 33b of the ground wire 33 , are across the entire area in the direction of extension of the branch line cable harness 30 integrated and connected, such that the energy supply line 31 , the communications line 32 and the ground wire 33are aligned in a lateral direction. The connector 34 is equipped with a large number of connections (not shown) that connect to the conductor wire 31a , the pair of electrical wires 32a and the conductor wire 33a are electrically connected. The connector 34 , which is located at one end of the branch line cable harness 30 is located, is inserted into and connected to the connector receiving opening 11 of the electrical junction box 10 , and the connector 34 , which is located at the other end of the branch line cable harness 30 is located, is inserted into and connected to the connector receiving opening (not shown) of the electrical component 40 Therefore, the electrical junction box 10 and the electrical component 40 through the branch line cable harness 30electrically connected, thus enabling energy transfer and multiplex communication between the electrical junction box 10 and the electrical component 40 possible.

[0024] At the in Fig. The example shown is each electrical junction box. 10 at a position relatively close to a mounting position of the connected electrical component 40 on the vehicle body 2 arranged. Therefore, the length of the branch line cable harness is 30 , which is connected to every electrical junction box 10 The connection is relatively short. On the other hand, some adjacent electrical junction boxes have 10 a large distance exists between them. Therefore, the multitude of main line cable harnesses includes 20 relatively long.

[0025] Especially in the case of the Fig. In example 1, an electrical junction box is shown. 10awith a direction indicator light 40a on the right front of the vehicle body, and a right headlight 40b connected. An electrical junction box 10b is equipped with a left headlight 40c and a direction indicator light 40d Connected to the left front of the vehicle body. An electrical junction box. 10c is equipped with a brake control module 40e connected. An electrical junction box 10d is equipped with a fuel injection control module 40f connected. An electrical junction box 10e comes with a right electric exterior mirror 40g , an electrical component 40h a right front door, and an electrical component 40i connected around a right-hand electric front seat. An electrical junction box. 10f comes with a left electric exterior mirror 40j, an electrical component 40k a left front door, and an electrical component 401 connected around a left-hand electric front seat. An electrical junction box. 10g is equipped with an electrical component 40m around an air conditioner, an electrical component 40n around a windshield display or a head-up display, and an electrical component 40o Connected around a steering wheel. An electrical junction box. 10h is equipped with an electrical component 40p a right rear door, an electrical component 40q around a right-hand electric rear seat, and a direction indicator light 40r connected to a right rear side of the vehicle body. An electrical junction box. 10i is equipped with an electrical component 40s a left rear door, an electrical component 40taround a left electric rear seat, a direction indicator light 40u on a left rear side of the vehicle body, and a top-mounted brake light 40v tied together.

[0026] Here the in Fig. 3B branch line cable harnesses shown 30 of the V-type used for the connection under or between the electrical junction box 10e , the right electric exterior mirror 40g and the electrical component 40h the right front door, the connection between the electrical junction box 10f , the left electric exterior mirror 40j and the electrical component 40k the left front door, and the connection between the electrical junction box 10g , the electrical component 40m around the air conditioning system, and the electrical component 40n around the head-up display, and the one in Fig. 3A branch line cable harnesses shown 30 The I-type connectors are used for the other connections of the electrical junction boxes. 10 and the electrical components 40 used.

[0027] The electrical junction boxes 10a and 10c are routed through the main cable harness 20a connected. The electrical junction boxes 10b and 10d are routed through the main cable harness 20b connected. The electrical junction boxes 10c and 10d are routed through the main cable harness 20c connected. The electrical junction boxes 10c and 10e are routed through the main cable harness 20d connected. The electrical junction boxes 10d and 10f are routed through the main cable harness 20e connected. The electrical junction boxes 10e and 10fare routed through the main cable harness 20f connected. The electrical junction boxes 10f and 10g are routed through the main cable harness 20g connected. The electrical junction boxes 10e and 10h are routed through the main cable harness 20h connected. The electrical junction boxes 10f and 10i are routed through the main cable harness 20i connected. The electrical junction boxes 10h and 10i are routed through the main cable harness 20j tied together.

[0028] In particular, each of the main line cable harnesses 20d and 20e inserted through a through-hole in a dashboard 4 of the vehicle body 2 is planned. In particular, nozzles will be used. 3 (outer element) through which the main line cable harnesses 20d and 20dare inserted accordingly, fixed accordingly at the through-holes, thereby creating an engine compartment 5 and a passenger compartment 6 , which the dashboard 4 have been arranged in between, and are divided in a liquid-tight manner.

[0029] At the in Fig. The example shown in point 1 illustrates at least some of the multitude of electrical components. 40 (40a to 40v) attached to the vehicle body 2 are mounted, each with corresponding grounding points (not shown) of the vehicle body 2 connected in order to be grounded. For example, when the electrical component 40 The electrical component has a metallic housing. 40 by electrically connecting (screws or the like) the housing to the vehicle body 2 (including any reinforcement or the like) must be grounded. Therefore, the branch line wiring harness can be 30 ( Fig. 10) solely from the power supply line 31 and the communications line 32 be formed. Furthermore, if it is difficult to find a grounding point around the electrical component. 40 connected electrical junction box 10 to provide the electrical component 40 and the electrical junction box 10 using the branch line wiring harness 30 , which is the energy supply line 31 , the communications line 32 and the ground wire 33 has, be connected in such a way that the electrical junction box 10 through the electrical component 40 is grounded. In this case, the electrical junction box 10 by means of the electrical component 40 and the branch line cable harness 30 ( Fig. 3A to Fig. 3C) be grounded.

[0030] If the electrical component 40 among the multitude of electrical components 40 , such as the electrical component 40 , which is difficult to connect to the grounding point in its vicinity, or the electrical component 40 , which is covered with a resin-based housing, difficult to attach to the vehicle body 2 To ground, it is also possible to ground the electrical component 40 connected electrical junction box 10 by means of the branch line cable harness 30 ( Fig. 3A to Fig. 3C) on the vehicle body 2 to ground, and the electrical component 40 by means of the branch line cable harness 30 and the electrical junction box 10 to ground.

[0031] As a consequence, it is not necessary to have a ground wire connected to the electrical junction boxes. 10connecting main line cable harness 20 to provide for the large number of electrical junction boxes 10 to ground it. That's why there's a grounding feature on the wiring harness. 1 no ground wire in the main wiring harness 20 As described above, the multitude of main line cable harnesses are included. 20 relatively long. Therefore, the total length of the ground wire can be considered the entire length of the wiring harness. 1 significantly shortened, compared to an aspect where ground wires are used for all of the numerous main line cable harnesses. 20 , which are the electrical junction boxes 10 connect, are provided. Thus, the weight of the wiring harness can be reduced. 1Its size can be reduced. Furthermore, by drastically shortening the overall length of the ground wire, the extent to which interference noise is transmitted to the wiring harness due to the ground wire acting as an antenna can be reduced. 1 The amount applied can also be significantly reduced.

[0032] At the in Fig. The example shown in point 1 is a multitude of loop circuits created by connecting the multitude of electrical junction boxes. 10 with the large number of main line cable harnesses 20 formed. In particular, there are two loop circuits, such as a loop circuit that is in the sequence of "electrical junction box". 10c - Main line wiring harness 20c - electrical junction box 10d - Main line wiring harness 20e - electrical junction box 10f - Main line wiring harness 20f- electrical junction box 10e - Main line wiring harness 20d - electrical junction box 10c" is connected, and a loop circuit, which is in the sequence of "electrical junction box" 10e - Main line wiring harness 20f - electrical junction box 10f - Main line wiring harness 20i - electrical junction box 10i - Main line wiring harness 20j - electrical junction box 10h - Main line wiring harness 20h - electrical junction box 10e" is connected.

[0033] Even if there is an abnormality such as a break or disconnection in part of the main wiring harness. 20 Therefore, if this occurs, it is easy to ensure a detour route. The wiring harness 1 Therefore, it can be used with the wiring harness 1 greatly increases the redundancy of the system.

[0034] The following is a list of the numerous connector mounting openings. 11 , which are in the electrical junction box 10 are included, with reference to Fig. 4 will be described. As in Fig. As shown in 4, it is located in the electrical junction box 10 the large number of connector mounting openings 11 Available in a variety of sizes. These sizes include one size (the size of the connector receiving opening). 11a accordingly), in which a connector receiving opening 11 is formed with the size, and a size (the sizes of the connector receiving openings) 11b until 11d accordingly), in which the multitude of connector receiving openings 11 is formed with those dimensions.

[0035] At the in Fig. The example shown in section 4 is a large number of connector receiving openings. 11designed with four sizes, and in particular a connector receiving opening 11a , two connector mounting openings 11b , six connector receiving openings 11c and ten connector mounting holes 11d Formulated in descending order of size. Ca until Cd Auxiliary wiring harnesses of appropriate sizes are connected to the corresponding connector mounting openings. 11a until 11d connected. In particular, the connectors are Ca until Cd the connector 23 of the main cable harness 20 and the connector 34 of the branch line cable harness 30 .

[0036] At the in Fig. In example 4, since the magnitude or value of the current flowing through the auxiliary wiring harness is greater, the connectors are Ca until Cd Larger sizes are connected to the auxiliary wiring harnesses. Therefore, the size of the connector receiving opening corresponds to this. 11 of the order of magnitude (especially the order of magnitude of the power supply lines) 21 and 31 flowing current) of the current that flows through the connector receiving opening 11 connected auxiliary wiring harness flows. As a consequence, compared to an aspect where the sizes of the connectors of the multitude of auxiliary wiring harnesses and the sizes of the multitude of connector receiving openings. 11 standardized to the largest size, the electrical junction box requires 10 not excessive specifications, and therefore the size of the electrical junction box can be 10 to a great extent.

[0037] Furthermore, as described above, the electrical junction box 10A connection target is identified by referencing the ID information of the connection target of the connected auxiliary wiring harness using the microcomputer it contains. In other words, it exhibits connection compatibility. This is achieved when a multitude of auxiliary wiring harness connectors of the same size are used with a multitude of corresponding connector receptacles. 11 Since they are connected with the same size, it is therefore possible to identify each of the connection destinations and form a desired circuit, regardless of which connector is connected to any of the connector receiving slots. 11 is connected. As a consequence, compared to an aspect where the connector receiving openings 11If the components are marked or designed to be connected with appropriate connectors, it is possible to significantly reduce the worker's workload if the connector of the auxiliary wiring harness is aligned with the connector receiving opening. 11 is connected.

[0038] Next, an example of a manufacturing process for the cable harness described above will be presented. 1 described with reference to the drawings.

[0039] First, as in Fig. 5A is shown, the main line cable harnesses 20 designed to conform to a cable or wire routing pattern on the vehicle body. In this case, the main cable harness can be used. 20 be designed in such a way that the energy supply line 21 and the communications line 22 are formed as an electrical wire, as in Fig. 2 shown, or can be designed in such a way that the energy supply line 21 and the communications line 22 as separate electrical wires are formed, as in Fig. 6 shown.

[0040] In the case of the former (an electrical wire), the main wiring harness can 20 for example by jointly extruding the energy supply line 21 and the communications line 22 be designed to create the connecting section 24 to provide while the power supply line 21 and the communications line 22 with the insulator 21b and the insulator 22c be covered. On the other hand, in the case of the latter (separate electrical wires), as in Fig. Figure 6 shows, for example, the energy supply line. 21 and the communications line 22manufactured in such a way that they are separate from each other, and a pair of connectors C1 , which are connected to both ends of the power supply line 21 of the main cable harness 20 are connected, and a pair of connectors C2 , which are connected to both ends of the communication line 22 of the main cable harness 20 The connected components are joined together in such a way that the connectors located at the corresponding ends are connected by a connection structure (not shown). Therefore, a main line cable harness can be... 20 of the I-type, which is a power supply line 21 , a communication line 22 and a pair of connectors 23 (=connector C1+connector C2) contains, which are connected to both ends of a set of power supply lines 21 and the communications line 22are connected. As described above, the one that differs in Fig. 6 Main line cable harness shown 20 from the in Fig. 2 main line cable harness shown 20 insofar as the energy supply line 21 and the communications line 22 are not connected across the entire area in the direction of extension.

[0041] Next, as in Fig. As shown in 5B, the branch line cable harnesses are 30 designed to conform to a wire guide shape on the vehicle body.

[0042] Then, as in Fig. 5C shown, the main line cable harnesses 20 and the branch line cable harnesses 30 connected to electrical junction boxes 10 the large number of electrical junction boxes 10 to correspond in sequence. As a consequence, the wiring harness 1 trained.

[0043] Compared to a circuit design in which a power supply and an electrical component are connected in principle one-to-one, similar to the circuit body of the related technology described above, the manufacturing process of the cable harness 1 This manufacturing process simplifies the process, thus increasing the productivity of the cable harness. 1 improved. Furthermore, it is also possible, for example, to increase productivity by integrating the branch line cable harness. 30 to further improve every area of ​​the vehicle body or the like. Second embodiment

[0044] Below is a circuit body (wiring harness) 1A and wiring harness 1B ) for a vehicle according to a second embodiment of the invention with reference to Fig. 7 to Fig. 9F will be described.

[0045] The wiring harnesses 1A and 1BAccording to the second embodiment, they differ from the one in Fig. 1 shown cable harness 1 in that, in the second embodiment, the circuit body is mounted on a vehicle body 2A of a vehicle with a right-side steering wheel specification or a vehicle body 2B a vehicle with a left-hand drive steering wheel specification. To facilitate explanation, in Fig. 7 to Fig. 9F parts with essentially the same structures and functions as those found in Fig. 1 are represented by the same reference symbols and letters as those attached to such parts in Fig. 1 are assigned. Furthermore, the detailed descriptions of those parts are appropriately omitted.

[0046] Fig. 7 represents an example where the wiring harness 1A on the vehicle body 2Aa vehicle is wired with a right-side steering wheel specification. As in Fig. As shown in 7, the wiring harness contains 1A a branch line cable harness 30 (including a branch line wiring harness) 30a ) for the right-side steering wheel in addition to the numerous electrical junction boxes 10 and main line cable harnesses 20 .

[0047] The branch line cable harness 30 The right-side steering wheel corresponds to the vehicle body. 2A the right-side steering wheel specification, and the electrical component 40o around a steering wheel, and the electrical component 40n around a head-up display, branch line cable harnesses are used. 30a with an electrical junction box 10e connected, located on the right side in the vicinity of a dashboard of the vehicle body 2Ais intended. Therefore, it is possible to use the electrical component. 40o and the electrical component 40n with the electrical junction box 10e to connect at a shorter distance, compared to the example of Fig. 1, and it is possible to install a central electrical junction box 10g to remove the one in the example of Fig. 1 is planned.

[0048] Fig. 8 represents an example where the wiring harness 1B on the vehicle body 2B a vehicle is wired with a left-side steering wheel specification. As in Fig. As shown in section 8, the wiring harness contains 1B a branch line cable harness 30 (including a branch line wiring harness) 30b ) for the left-side steering wheel in addition to the numerous electrical junction boxes 10 and main line cable harnesses 20 .

[0049] The branch line cable harness 30 The left-side steering wheel corresponds to the vehicle body. 2B the left-side steering wheel specification, and the electrical component 40o around a steering wheel, and the electrical component 40n around a head-up display, branch line cable harnesses are used. 30b with an electrical junction box 10f connected, located on the left side in the vicinity of the dashboard of the vehicle body 2B is planned. Similar to Fig. 7. Therefore, it is possible to use the electrical component. 40o and the electrical component 40n with the electrical junction box 10f to connect over a short distance, compared to the example of Fig. 1, and it is possible to access the central electrical junction box 10g to remove the one in the example of Fig. 1 is planned.

[0050] In the Fig. 7 and Fig. 8 examples shown, unlike the one in Fig. The example shown in point 1 is a loop circuit consisting of a multitude of electrical junction boxes. 10 and a large number of main line cable harnesses 20 The design is not yet finalized. Depending on the degree of redundancy required for a circuit body (wiring harness) in a vehicle, it can be determined whether the loop circuit should be designed as described in... Fig. 1, Fig. 7 and Fig. Figure 8 is shown. Details will be described below.

[0051] Next, an example of a cable harness manufacturing process will be given. 1A or the wiring harness 1B , which are described above, with reference to the drawings.

[0052] First, as in Fig. Shown in 9A are the main line cable harnesses 20designed to conform to a wire routing pattern on the vehicle body. In this case, the main wiring harness can be used. 20 be designed in such a way that the energy supply line 21 and the communications line 22 are formed as an electrical wire, as in Fig. 2 shown, or can be designed in such a way that the energy supply line 21 and the communications line 22 as separate electrical wires are formed, as in Fig. Figure 6 shows examples of the manufacturing processes for the main line cable harness. 20 In the cases of the former (one electrical wire) and the latter (separate electrical wires), the specifications are the same as those of the first embodiment described above.

[0053] Next, as in Fig. 9B is shown, in one case of the wiring harness 1AFor a vehicle with the right-side steering wheel specification, the branch wiring harnesses are 30 (including the branch line wiring harness) 30a) Designed for the right-hand steering wheel to match the wire guide shape on the vehicle body. On the other hand, as in Fig. 9C is shown, in one case of the wiring harness. 1B For a vehicle with the left-side steering wheel specification, the branch line wiring harnesses are used. 30 (including branch line cable harnesses) 30b) Designed for the left-side steering wheel to match the wire guide shape on the vehicle body.

[0054] Then, as in Fig. The main cable harnesses are shown in 9D. 20 and the branch line cable harnesses 30 (including branch line cable harnesses) 30a ) with corresponding electrical junction boxes 10 the large number of electrical junction boxes 10connected in sequence. As a consequence, the wiring harness 1A trained for a vehicle with a right-hand drive steering wheel specification. Similar to in Fig. As shown in 9E, the main line cable harnesses are shown. 20 and the branch line cable harnesses 30 (including branch line cable harnesses) 30b ) with corresponding electrical junction boxes 10 the large number of electrical junction boxes 10 connected in sequence. As a consequence, the wiring harness 1B trained for a vehicle with a left-side steering wheel specification.

[0055] It is possible to change the manufacturing process of the wiring harness. 1A for a vehicle with a right-side steering wheel specification, and the wiring harness 1BFor a vehicle with a left-hand steering wheel specification, this manufacturing process simplifies production and thus improves productivity. Furthermore, parts with a common structure can be used regardless of specifications, resulting in high application flexibility. Therefore, it is practically possible to compensate for differences in specifications depending on the steering wheel position simply by selecting the appropriate branch wiring harness. 30a with the right-side steering wheel specification, or the branch line wiring harness 30b to cope with the left-side steering wheel specification.

[0056] If a loop circuit is used in the circuits of Fig. 7 and Fig. 8 is designed, it is sufficient to use the main line cable harnesses 20 from Fig. 9F with the main line wiring harnesses 20 from Fig. 9A to connect selectively. Other embodiments

[0057] The invention is not limited to the embodiments described above, and various modifications can be incorporated within the scope of the invention. For example, the invention is not limited to the embodiments described above and can be appropriately modified, improved, and the like. Furthermore, the materials, shapes, dimensions, numbers, placement locations, and the like of essential components or forming elements in the embodiments described above are arbitrary, as long as the invention can be achieved, and are not limited thereto.

[0058] For example, the electrical component 40 In the first and second embodiments, ID information is stored instead of the electrical component. 40 However, the one at the end of the branch line cable harness can 30 The connectors provided contain the ID information.

[0059] Furthermore, the branch line cable harness 30 in the first and second embodiments the ground wire 33 on (see Fig. 3A to Fig. 3C). If it is not necessary to connect the ground wire 33 in the branch line cable harness 30 However, it can be designed in such a way that the ground wire 33 in the energy supply line 31 and the communications line 32 is not included in the branch line wiring harness 30 , as in Fig. 10A to Fig. 10C is shown.

[0060] In the first and second embodiments, each of the main line cable harness has 20 and the branch line cable harness 30 just a power supply line 31 on (see Fig. 2A to Fig. 3C). However, if necessary, any of the main wiring harness can be used. 20 and the branch line cable harness 30be designed to accommodate a large number (for example, two) of power supply lines 31 to demonstrate.

[0061] Furthermore, the electrical junction box 10 It should be designed to have an antenna capable of wireless communication with the outside, in addition to the various functions described above, in such a way that it is possible to process various types of information exchanged with the outside and to transmit the information via the communication line. 32 to transmit and receive.

[0062] Here, the features of the circuit body for a vehicle according to one or more embodiments of the invention described above are briefly summarized and listed below in (1).

[0063] (1) A circuit body ( 1) for a vehicle, which is attached to a vehicle body of the vehicle for supplying electrical energy to an electrical component ( 40 ) and communication of various communication signals is wired to the electrical component, wherein the circuit body has: a large number of control boxes ( 10 ), which are arranged separately on the circuit body and are capable of controlling an input and output of at least one of the electrical energy and the communication signal; a main line wiring harness ( 20 ), which connects one of the multitude of control boxes and another of the multitude of control boxes; and a branch line cable harness ( 30 ), which connects the control box and the electrical component, where at least one of the numerous control boxes ( 10 ) by means of the electrical component ( 40 ), which is connected to the branch line wiring harness (30 ) is connected, is grounded. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 2017232891

[0001] JP 2005078962 A

[0004]

Claims

[1] Circuit body for a vehicle, which is wired to a vehicle body of the vehicle for supplying electrical energy to an electrical component and for communicating various communication signals with the electrical component, wherein the circuit body comprises: a multitude of control boxes, arranged separately on the circuit body and capable of controlling an input and output of at least one of the electrical energy and the communication signal; a main wiring harness connecting one of the multiple control boxes to another of the multiple control boxes; and a branch line wiring harness that connects the control box and the electrical component, where at least one of the numerous control boxes is grounded by means of the electrical component connected to the branch line cable harness.

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