JPS6180711A - Wire harness for automobile - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Object of the Invention] The present invention relates to a wiring harness for an automobile, and more particularly, to a printed circuit board-like integrated circuit board for each circuit of a wiring route constituting the wiring harness. By replacing part of the wire harness with this integrated circuit board, the wire harness can be made lighter and smaller, the handling can be simplified, and productivity can be improved.

A conventional wire harness has a configuration in which the wiring route is determined in advance, and all the electric wires passing through the route are bundled together and tied with vinyl tape or the like. Figure 10 shows an example, a
is an electric wire, b is a vinyl tape, and C is a connector. The wire harness A has a plurality of sub-harnesses e jointed (branch connections) to the main harness d, and has a complicated structure. Figure 11 shows the wiring, in which the wire harness A is routed along a predetermined wiring route so as to follow the structure and shape of each part of the car B, and is fixed to the car body using clips, clamps, etc. (not shown). There is.

However, with conventionally known technology, it has not been possible to suppress the increase in the diameter of wire harnesses due to the increasing electronicization of in-vehicle components, and due to the increase in the number of various electrical components themselves, parts and vehicles and wire harnesses have become increasingly difficult to control. This causes interference, making it difficult to secure sufficient installation space.Furthermore, as the diameter and weight of the wire harness increases, the number of man-hours required for manufacturing and assembling the wire harness also increases, resulting in many problems such as: It was out.

I'm going to try it. (1) The wire diameters and wire lengths of the wires that make up the wire harness vary widely, and branch wires for connecting auxiliary equipment such as connectors (the above-mentioned joint parts) come out from various places, which increases the number of man-hours. Difficult to automate.

(2) Even for the same car model and model, individual wiring harnesses must be created for each specification and grade, making production and management extremely complicated.

(3) When joining wires together, additional work is required such as stripping the wires, crimping the joint terminals, and wrapping insulation tape around the joints.
Due to insulation tape, etc., it bulges out and becomes irregular in shape.

(4) Due to the increase in the number of circuits mentioned above, the wiring harness
There is a tendency for wire harnesses to become larger in diameter, and with the current form of wire harnesses, it becomes increasingly difficult to route them, and the space inside the vehicle interior has to be reduced.

The present invention has been made to solve these problems.

[Structure of the invention]

. The present invention focuses on particularly large-diameter and enlarged parts of the wire harness, such as the part where a large number of electric wires are concentrated (main harness d in Figure 10) and the joint part (sub-harness e in the same figure). However, the above-mentioned problems were solved by making this into a flat board like a normal print board (P, C, B) or a flexible printed board (F, P, C).

The large-diameter enlarged portion of the wire harness is absorbed and eliminated by the flat concentrating circuit board. Therefore, by installing the convergence circuit board at key points of the wire harness, the wire harness can be made smaller and lighter, and its interconnection can be achieved extremely easily.

Since all conventional joint parts can be incorporated into the convergent circuit board, work processes such as stripping the wires and crimping the joint terminals are no longer necessary, dramatically improving the assembly and productivity of the wire harness.

Since the concentrating circuit board is flat, it can be integrally molded, for example, on the wall of an instrument panel, and the wiring harness can be routed even in a narrow space.

Furthermore, even if you add electrical components or change the model or grade of your car, you can easily wire it by simply adding a converging circuit board that does not take up much space.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to drawings showing embodiments.

FIG. 1 is a plan view of the integrated circuit board according to the present invention, and FIG. 2 is a perspective view of its laminated state.

The convergent circuit board 1 is formed by disposing a plurality of conductive members 3 on an insulating substrate 2.

The insulating substrate 2 is formed into a band shape using an insulating material commonly used for printed circuits, such as a film such as polyester or polyimide resin, paper phenol, or glass epoxy, but a film-like substrate is preferable for reducing weight and size and facilitating wiring. The insulating substrate 2 has an L line corresponding to the wiring route of the wire harness.
Cut the bent part 2a and T-shaped branch part 2b of the mold.

The conductive member 3 is made of a metal conductor such as copper or aluminum in the form of a narrow strip having a uniform thickness and varying widths depending on the current capacity. This conductive member 3 is configured to have a desired circuit pattern corresponding to the wiring route of the target wire harness.

In the figure, conductive members 31, 32, and 33 are different inside, and an L-shaped bent circuit 3b is provided at the end of a straight circuit 3a, and the member 33 is formed in a branched shape with one branch circuit 3c. ing. In this way, even when a single circuit is connected to a large number of auxiliary devices, switches, etc., it can be easily processed by changing the configuration of the circuit pattern.

Therefore, the circuit pattern of the conductive member 3 disposed on the converging circuit board l is divided into 3 feet of (i) circuit function, (11) load operation, and (iii) combination of both, and maximizes the effect. choose to demonstrate

By focusing on the functions of circuits, such as power supply circuits, grounding circuits, signal operation circuits, meter circuits, etc. for various electrical components (loads) onboard the vehicle, we define the functions of circuits as a single circuit that has all the functions. Refers to forming a converging circuit board. The actuation of a load refers to the formation of a single integrated circuit board with all circuits necessary for operating a load such as a wiper, such as a power supply circuit, a grounding circuit, a signal circuit, and a switch circuit, as a constituent unit. In addition, the combination of the two refers to appropriately combining the above circuits to form a multifunctional convergent circuit board, and designing a circuit pattern that is highly effective in reducing weight and size from the entire wiring route of the wire harness. .

FIG. 2 is a perspective view of the interlayer connection board. One of the interlayer connection substrates 4 is provided with interlayer connection circuits 6 extending from a plurality of through holes 5 provided at the center of the insulating substrate 2 to both left and right ends, and a circuit 7 having no through holes. The other interlayer connection substrate 4' has a configuration in which crosspiece through holes 5 are provided at both ends of a plurality of interlayer connection circuits 6' disposed on the insulating base FiZ. These substrates 4, 4'
may be single-sided or double-sided (can be used for connection between the upper and lower layers of the above-mentioned concentrating circuit board and for connection between adjacent concentrating circuit boards. Note that the interlayer connection circuits 6, 6', and 7 are connected to the above-mentioned conductive member 3. Use similar members.

FIG. 3 is a sectional view showing the state of connection between the upper and lower layers when the bundled circuit boards are stacked. That is, the circuits 6 and 6 of the interlayer connection boards 4 and 4 are directly connected to the ends of the conductive members 3 and 3 of the upper and lower concentrating circuit boards 1 and 1' by soldering 8, respectively, and the through holes 5 are driven with eyelets 9. It is fixed at Instead of the eyelet 9, connections can be made using rivets, pins, soldering, etc. In addition, instead of soldering 8, the conductive member 3 and the circuit 6 may be connected directly by screws, anisotropic conductive rubber, welding, conductive adhesive, etc., or indirectly connected by a connector, etc., which will be described later. You can also.

Figure 4 shows a stack of multiple converging circuit boards 1.1' and 1.1' and 1.5V formed as shown in Figure 1, and each circuit board is classified according to the circuit function or load operation described above. formed by
The upper and lower layers or adjacent concentrating circuit boards are connected by interlayer connection boards 4, 4'.

In this way, the interlayer connection boards 4 and 4' allow various connection methods for the convergent circuit board, so for example, when each layer is arranged separately, power lines, ground lines, signal lines, etc. are not required. Depending on the situation, they can be combined into a single layer or conversely dispersed. Also, focusing surface ii! i! Since the circuit pattern of each conductive member 3 disposed on the r slope can be divided into several parts, it is possible to design and manufacture only the circuit pattern of each part.

FIG. 5 and FIG. 6 are explanatory diagrams each showing a method of connecting the terminal portions of the integrated circuit board.

That is, in the convergent circuit board 1 of FIG. 5, a terminal (not shown) is connected to the terminal of the conductive member 3, and a connector 1o having a corresponding mating terminal connects switches, various electronic devices, etc. can be connected directly. On the other hand, in the convergent circuit board 1 shown in FIG.
are permanently connected by spot welding, soldering, etc.
A pair of female and male connectors 1 are attached to the ends of these wires 12.
0.10' allows it to be connected to another sub-harness 13 or to take out circuit signals to the outside.

FIG. 7 shows a plurality of concentrating circuit boards 1.1' as shown in FIG.
Fig. 8 shows a state in which a wire harness 14 formed by laminating wires 1'' is embedded and routed in a pad of an instrument panel 15. Fig. 8 shows a cross-sectional view thereof.
5a is a wall surface of the instrument panel, and 16 is an insulating foam material covering and molding the wire harness 14. In this way, the flat convergence circuit board or the wire harness formed from it can be integrated into the body of an automobile or a component mounted on the vehicle by molding and then routed.

FIG. 9 fa+, (bl respectively indicate other interlayer connection means of the convergent circuit board. Parts ', (al) are those in which through holes 5 are directly provided in the conductive member 3 or its extension, ( bl has a conductive member 3 protruding from an insulating substrate 2 and an eyelet 17. In this case, the interlayer connection substrates 4, 4' are not required, or the number of them used can be greatly reduced. can be reduced to

〔Effect of the invention〕

Since the present invention is as explained above, it has the following effects.

(11) Conventionally, a wire harness formed by bundling a large number of electric wires is replaced with a bundled circuit board composed of a band-shaped conductive member and an insulating substrate that supports it.
The insulating base material becomes thinner, and there is no need for vinyl tape, clamps, etc. for convergence, and the entire wire harness can be significantly reduced in weight and size.

(2) The focusing circuit is a thin plate like a Priton board, and can be embedded and integrated into the floor, wall, parts, etc. of the vehicle body, and the space required for wiring is unnecessary or extremely small.

(3) The convergence circuit board can incorporate a circuit pattern corresponding to a desired wiring route of the wire harness. Therefore,
The number of man-hours required for conventional joints and the number of man-hours required for assembling wire harnesses on the production line are also greatly reduced, dramatically improving productivity.

(4) Since the convergence circuit board can be connected in various ways depending on the interlayer connection board, subharnesses can be added to the main harness, and each circuit pattern can be easily designed and manufactured.

(5) By stacking and installing bundled circuit boards at key points of the wire harness, it becomes possible to assemble the wire harness in a cassette style.

[Brief explanation of drawings]

1 to 9(b) show embodiments of the present invention, in which FIG. 1 is a perspective view of the main parts of the integrated circuit board, FIG. 2 is a perspective view of the interlayer connection board, and FIG. The figure is a cross-sectional view showing the state of connection between layers when stacked circuit boards are stacked, FIG. 4 is a perspective view of the stacked state of the stack circuit boards, and FIGS. An explanatory diagram showing a connection method, FIG. 7 is a perspective view showing an example of wiring the wire harness of the present invention, FIG. 8 is a cross-sectional view of a part of FIG. 7, and FIGS. A perspective view of the main parts showing another example of the circuit board, 1st
FIG. 0 is an explanatory diagram of a conventional wire harness, and FIG. 11 is a perspective view showing its routing. 1. 1', 1''... Convergence circuit board, 2... Insulating board,
3... Conductive member, 4,4'... Interlayer connection board,
5... Through hole, 6.6', 7... Interlayer connection circuit, 9... Eyelet.

Claims (9)

[Claims] (1) A laminated bundled circuit board comprising two or more laminated bundled circuit boards each having a conductive member having a circuit pattern corresponding to a desired wiring route of a wire harness arranged on an insulating substrate. A wire harness for an automobile, characterized in that the wire harness is interlayer-connected to another convergent circuit board with or without the intervening board for interlayer connection. (2) In an automobile wire harness in which a plurality of electric wires are bundled and routed along a predetermined wiring route so as to follow the structure, shape, etc. of each part of the automobile, a part of the wiring route is divided into two or more blocks. A conductive member having a circuit pattern corresponding to each divided block is arranged on an insulating substrate to form a plurality of bundled circuit boards, and these bundled circuit boards are laminated to form a single bundle of laminated blocks. A wire harness for an automobile, characterized in that a part of the wiring route is replaced with a circuit board interlayer-connected to another convergent circuit board with or without an interlayer connection board. (3) The automotive wire harness according to any one of claims 1 to 2, wherein the conductive substrate is formed in the shape of a narrow band having a uniform thickness and different widths depending on the current capacity. (4) The automotive wire harness according to any one of claims 1, 2 and 3, wherein the conductive member of the bundled circuit board includes a branched arrangement portion. (5) The vehicle according to any one of paragraphs 1, 2, and 4, wherein the convergent circuit board is formed as a circuit pattern corresponding to each block, such as a power line, a ground line, and a wiper line of the vehicle. wire harness. (6) According to any one of claims 1, 2 to 5, wherein the terminal portion of the bundled circuit board is provided with means for connecting to another bundled circuit board, a wire harness, or other member. automotive wiring harness. (7) A through hole is provided in a part of the conductive member disposed on the convergent circuit board or its extension, and an eyelet, a rivet,
7. The automotive wire harness according to claim 1, wherein the upper and lower concentrating circuit boards are directly interlayer connected by pins or the like. (8) A through hole is provided in a part of the conductive member disposed on the bundled circuit board or an extension thereof, and an interlayer connection circuit having through holes at both ends is provided on the interlayer connection board, and the interlayer connection The automotive wire according to any one of claims 1, 2 to 7, wherein the upper and lower convergent circuits laminated via a substrate are indirectly connected between layers by eyelets, rivets, pins, etc. Harness. (9) The wire harness for an automobile according to any one of claims 1, 2 to 8, wherein the converging circuit board is integrally molded on the body of the automobile or on-vehicle components.