JP2606509Y2 - Electrical junction box - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric junction box mounted on an automobile or the like, and more particularly to a circuit conductor configuration thereof.

[0002]

2. Description of the Related Art A conventional electric connection box is composed of an upper case and a lower case, in which a wiring board is housed. The wiring board is configured by mounting a bus bar on an insulating plate, and the bus bar is formed into a predetermined shape by punching and bending a metal plate, and is directed upward or downward at an end or an intermediate portion. Of the present invention. FIG. 3 is an exploded perspective view of a conventional electric junction box. In the figure, 1 is an upper case, 2 is a lower case, 3 is a bus bar, 4 is an insulating plate, 5 is an external connection part, 6 is a tab terminal inserted into the external connection part 5, 7 is a fuse, 8 is a relay, 9 is a relay. An intermediate connection terminal for connecting the bus bar 3 and the fuse 7.

[0003]

However, the conventional electric junction box has the following problems. That is, 1)
A die is required for stamping the bus bar, which is expensive. In addition, since the shape of the bus bar is restricted, the circuit configuration is also restricted, and the size of the electric connection box is increased.
2) Since the bus bar is mounted on the insulating plate to assemble the wiring board, equipment costs and many man-hours are required.

[0004]

SUMMARY OF THE INVENTION The present invention provides an electric connection box which solves the above-mentioned problems. In an electric connection box in which a desired conductor pattern is accommodated in a case, the conductor pattern has a thickness. Membrane conductor inside insulating plate and insulating plate surface
Formed embedded in multiple layers, embed the insulating plate surface
The thick film conductor is thinner than the thick film conductor inside the insulating plate.
By also in the range and wherein the decoction.

[0005]

The pattern of the thick film conductor can be formed with relatively small-scale equipment and at low cost, and the circuit design is highly flexible. Therefore, as described above, when the conductor pattern is formed by embedding a thick-film conductor in multiple layers inside the insulating plate and on the surface of the insulating plate , mold and wiring board assembling equipment costs become unnecessary, and equipment costs can be reduced. Also decreases. Further, when the thick film conductor embedded in the insulating plate is multi-layered, the number of insulating plates can be reduced, and the number of components is reduced, such as the necessity of a bus bar. Further, since the degree of freedom in circuit design is increased, the size of the electric junction box can be reduced.
Furthermore, the thick film conductor embedded in the insulating plate surface
Because it is thinner than the thick film conductor inside the edge plate, a relatively large
The circuit that flows the current (for example, power system)
When the thick-film conductor is formed by a body, even if the temperature of the thick-film conductor rises due to energization, the temperature rise of the insulating plate is uniform because the thick-film conductor is inside the insulating plate, and the insulating plate does not warp.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. FIG. 1 is a partial cross-sectional perspective view of a current board used in an embodiment of the electric junction box according to the present invention.
The current substrate 13 is an insulating substrate 1 made of epoxy resin.
4, a desired pattern is formed by the thick film conductors 15a and 15b, and a plurality of layers are laminated. The thick film conductor 15b formed on the surface of the insulating substrate 14 is thinner than the thick film conductor 15a formed inside the insulating substrate 14, and has a smaller allowable current. A land portion 16 for mounting a tab terminal is provided on the surface of the current board 13, and the surface of the current board 13 is insulated except for that portion. Reference numeral 17 denotes a through hole which connects the multilayered thick film conductors 15a to form a circuit. In this current board 13,
The signal system circuit is constituted by the thick film conductor 15b formed on the surface of the insulating substrate 14, and the power system circuit is constituted by the thick film conductor 15a formed inside the insulating substrate 14.

FIG. 2 is an exploded perspective view of the electric junction box in which the current board 13 is housed. The current board 13 is housed inside the upper case 11 and the lower case 12. Reference numeral 18 denotes a tab terminal, 19 denotes an external connection portion to a connector or the like, 20 denotes a relay mounted on the current board 13, and 21 denotes a fuse. The tab terminal 18 is connected to an external coupling portion 19 through a tab hole 22 provided in the upper case 11 or the lower case 12.
Connect to An intermediate connection terminal 23 connects the current board 13 and the fuse 21. In this embodiment, the current substrate 13
The thick-film conductor 15a inside is thicker than the thick-film conductor 15b on the surface, so that a large current flows through the inside. Can be prevented.

[0008]

As described above, according to the present invention, in an electric junction box in which a desired conductor pattern is accommodated in a case, the conductor pattern includes a thick-film conductor provided inside the insulating plate and on the surface of the insulating plate. The insulation is formed by embedding in a multilayer.
The thick film conductor embedded in the surface of the board is
Since it is thinner than the membrane conductor , manufacturing equipment costs can be reduced, the number of assembling steps can be reduced, and the degree of freedom in circuit design can be increased, so that the electrical junction box can be downsized.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional perspective view of a current board used in an embodiment of an electric junction box according to the present invention.

FIG. 2 is an exploded perspective view of an electric junction box housing the current board.

FIG. 3 is an exploded perspective view of a conventional electric junction box.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Upper case 12 Lower case 13 Current board 14 Insulating board 15a, 15b Thick film conductor 16 Land part 17 Through hole 18 Tab terminal 19 External coupling part 20 Relay 21 Fuse 22 Tab hole 23 Intermediate connection terminal

Claims (1)

(57) [Scope of request for utility model registration] 1. An electric connection box in which a desired conductor pattern is accommodated in a case, wherein the conductor pattern is formed by embedding a thick-film conductor in a multilayer in the insulation plate and on the surface of the insulation plate. Thick film conductor embedded in the front
An electrical junction box characterized by being thinner than the thick-film conductor inside the insulating plate .