JPH0361141A - Automotive under-body circuit body - Google Patents

Abstract

PURPOSE:To prevent thickening of a wire harness, etc., by respectively providing a thin type circuit and a connector connected with it to an under-board interposed between the body and the frame of an automobile to construct an under- body circuit body. CONSTITUTION:An under-body circuit body 5 is constructed by respectively providing a thin type circuit 8 and multiple connectors 9a-9i to an under board 7 interposed between the body 1 and the frame 6 of an automobile. And, the under-body circuit body 5 is pinched between the body 1 and the frame 6 by respectively penetrating the mounting holes 12 of the under board 7 and the locking holes of the body 1 against multiple bolts 11 vertically mounted to the frame 6 and fastening with nuts. On this occasion, for example, respective connectors 17a, 17b of both thin type circuits 16 respectively mounted to both front/rear bumpers 3, 4 are simultaneously connected respectively to respective corresponding connectors 9a, 9i of the under-body circuit body 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an underbody circuit body that is connected to a vehicle body as a unit in place of an automobile wire harness.

[Conventional technology]

FIG. 5 shows the wiring state of the wire harness in an automobile.

The wire harness W is fixed to the vehicle body 29 with a large number of clamps 30, and a synthetic resin protector 3 is attached to the frame r, 27, etc. for protection. A rubber grommet 32 is fitted to the portion leading into the vehicle interior from the room side to prevent water from entering the vehicle interior. Then, it is connected to electrical equipment, meters, lights, various electrical parts, etc. around the driver's seat (not shown) via the connector 33.

However, in recent years, as automobiles have become more value-added, the number of electrical components around the driver's seat has increased and various parts have become electronic.
As the wire harness W becomes enlarged, it becomes difficult to secure wiring space,
The clamp 30, protector 31 and grommet 32
Problems have arisen, such as an increase in the number of man-hours required for wiring and fixing the wire harness W and connecting the connector 33 using the wire harness W, and an increase in the burden on the operator.

[Problem to be solved by the invention]

In view of the above-mentioned points, an object of the present invention is to provide a circuit body for an automobile that can eliminate the enlargement of the wire harness and can be easily wired and connected without requiring human labor.

[Means to solve the problem]

In order to achieve the above object, the present invention forms an underboard that can be assembled between the body and frame of an automobile, provides a thin circuit on the underboard, and connects to the thin circuit. The basic structure is that a connector is provided.

It is also effective to form the underboard with synthetic resin.

[For production]

A connector provided on the body side, for example, a bumper, can be connected to the thin circuit connector provided on the underboard at the same time as the body side is assembled. Furthermore, if the underboard is made of synthetic resin, it is efficient because the printed circuit can be directly formed.

〔Example〕

FIG. 1 shows an underbody circuit body for an automobile according to the present invention.

In the figure, 1 is a vehicle body, 2 is an instrument panel installed on the indoor side of the vehicle body I, 3.4 is a front and rear bumper made of synthetic resin, and 5 is an underbody circuit body. , 6 indicates a frame, and the underbody circuit body 5 includes an underboard 7 made of heat-resistant and impact-resistant synthetic resin that can be attached between the vehicle body 1 and the frame 6. A thin circuit 8 is fixed to the underboard 7, and connectors 9a to 91 connected to the thin circuit 8 are fixedly provided.

Here, the thin circuit 8 is an underboard 7 made of synthetic resin.
On the other hand, printed circuits are formed directly by a transfer method, plating method, etc., or by pasting flexible flat circuits, flexible printed circuits, ribbon wires, flat wire harnesses, etc. Further, the three connectors 9a to 91 are located at the front and rear of the underboard 7, that is, at positions facing the front and rear bumpers 3, 4.
It is also disposed in the lower part of the engine room 10, the lower side of the instrument panel 2, etc.

Furthermore, mounting holes 12 for a plurality of bolts 11 provided upright on the frame 6 are bored at various locations on the underboard 7. That is, as shown in FIG. 2 showing the mounting structure of the underbody circuit body 5 (corresponding to part A in FIG. 1), the bolts 11 installed upright in the frame 6 are connected to the mounting holes 12 of the underboard 7 and the vehicle body. 1 and tightened with a nut 14 to sandwich the underbody circuit body 5 between the vehicle body 1 and the frame 6. Note that 15 in FIG. 1 indicates body guides protruding from both sides of the underboard 7.

Further, the front and rear bumpers 3 and 4 are provided with a thin circuit 16 (not shown) similar to that described above, and the connectors 17a and 17b connected to the thin circuit 16 are connected to the connector 9a of the underbody circuit body 5. , 9i. At the same time as these bumpers 3, 4 are assembled, the connectors 17a, 17b of the bumpers 3, 4 and the connectors 9a, 9i of the underbody circuit body 5 are joined. In the figure, 18 is a battery, which is directly connected to the connector 9b of the underbody circuit body 5.

Furthermore, a connector 19 is provided protruding from the lower part of the instrument panel 2, and as shown in FIG. 3, the connector 19 is connected to a circuit 20 in the instrument panel 2. When the instrument panel 2 is assembled, it is inserted into the hole 21 of the vehicle body 1 and connected to the connector 9d of the underbody circuit body 5. In the figure, 8 indicates a thin circuit, and 6 indicates a frame.

According to this embodiment, the connectors 9a to 91 can be joined at the same time as the body side 1 and the bumpers 3 and 4 are assembled, and the synthetic resin underboard 7 also provides soundproofing and waterproofing effects.

FIG. 4 shows another embodiment of the underbody circuit body according to the present invention.

The underbody circuit body 22 has an underboard 23 made of the same steel plate as the vehicle body 24, a thin circuit 25 with an insulating coating affixed to the underboard 23, and a connector connected to the thin circuit 25. 26a to 26h are fixedly installed. A plurality of projecting pieces 27 are vertically provided on the periphery of the underbody 23, and the vehicle body 24
The underbody circuit body 22 is fitted into the underbody circuit body 22 using the projecting piece 27 as a guide, and the projecting piece 27 is connected to the vehicle body 24 by welding or the like. In other words, the underboard 23 itself also serves as the body floor,
For this purpose, the floor panel of the vehicle body 24 has holes 28.

〔Effect of the invention〕

As described above, according to the present invention, since the thin circuit is provided on the underboard, the enlargement of the wire harness is eliminated, and the connector provided on the body side is connected to the thin circuit. It can be visually connected at the same time as assembly on the body side. Furthermore, if the underboard is made of synthetic resin, printed circuits can be directly formed, so circuit wiring is efficient and requires no manpower.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing an embodiment of the present invention, Fig. 2 is an explanatory diagram of the -1 state (corresponding to section A in Fig. 1), and Fig. 3 is an exploded perspective view showing an embodiment of the present invention. Explanatory diagram (B in Figure 1)
FIG. 4 is an exploded perspective view showing another embodiment, and FIG. 5 is a perspective view showing a conventional example. 1.24... Vehicle body, 5, 22... Underbody circuit body, 6... Frame, 7, 23... Underpod, 8.25--I type open circuit body, 9a to 9h, 26
a to 26h-connector, 17a, 17b, 19... connector.

Claims (2)

[Claims] (1) An automobile characterized in that an underboard that can be assembled between the body and frame of the automobile is formed, a thin circuit is provided on the underboard, and a connector connected to the thin circuit is provided. underbody circuit body. (2) The underbody circuit body for an automobile according to claim (1), wherein the underboard is formed of synthetic resin.