JPH09182251A - Electric connection box for car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the size of a large-sized electric connection box such as a junction block, etc., and to make it possible to fit a small-sized integrated fuse. SOLUTION: An internal circuit is put in a case composed of a lower case 10 and an upper case 11, and this internal circuit is divided into the three stages of a large current circuit, a middle current circuit, and a small current circuit. The large-current circuit is composed of bus-bars 18, and the middle-current circuit is of electric wires 16 are pressure welding terminals 17 to be pressure- welded to the electric wires 16, and the small current circuit is of a flexible printed circuit(FPC) 19. A fuse box 13 for mounting a small-sized integrated fuse 14 is arranged on the top surface of the FPC 19, and the upstream side touching surfaces of fusable substances provided in parallel at a small pitch of the small-sized integrated fuse 14 are connected to the electric wires 16, and the downstream side touching surfaces are to the FPC 19.

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 composed of a junction block for an automobile, and by constructing an internal circuit with a plurality of conductive materials, it is possible to achieve high density and miniaturization. When used,
The electrically conductive material of the internal circuit can be connected to the fusing bodies arranged in parallel at a small pitch of the fuse.

[0002]

2. Description of the Related Art Conventionally, in a large-sized electrical junction box such as a junction block, generally, bus bars formed by punching a conductive metal plate are arranged in multiple layers via an insulating plate to form an internal circuit, and an upper surface is formed at a required portion. Bend and bend down to form tabs,
It is connected to an external circuit.

When an internal circuit is constructed from the bus bar,
Since the bus bar must be formed according to the circuit change, there is a problem that the cost becomes high. As shown in FIG. 5, a part of the internal circuit is connected to the wire w and the pressure contact terminal T for connecting to the wire w.
There is also a case where it is configured with and is used together with the bus bar B.
(Jpn. Pat. Appln. KOKAI No. 2-136989) In some cases, the internal circuit may be composed of only the wire and the pressure contact terminal.

[0004]

However, in the case where the conventionally provided internal circuit is composed only of the bus bar, when it is composed only of the combination of the electric wire and the pressure contact terminal, and when it is composed of the combination of the bus bar and the electric wire + the pressure contact terminal. In either case, there was a limit to downsizing a large electric junction box.

That is, when the internal circuit is composed of only the bus bar, the pitch between the tabs provided on the bus bar is at least 4
Therefore, the connector and the fuse cannot be made compatible with a connector having a pitch smaller than that and a small integrated fuse, so that the size of the connector and the fuse becomes large, and accordingly, the electric junction box itself becomes large. The reason why the minimum pitch cannot be set to 4 mm or less is that the punching punch has insufficient strength when punching a conductive metal plate with a large press, and the punching punch may break during mass production.
This is because the dimensional accuracy cannot be obtained.

When an internal circuit is composed of an electric wire and a press contact terminal, the pitch is determined by the size of the press contact portion, and it is necessary to reduce the press contact terminal or the wire size in order to reduce the size. If the terminal is made smaller, a sufficient contact pressure cannot be obtained, and if the wire size is made smaller, the wire stretches at the time of manufacturing and causes a problem at the time of assembly.

Particularly, since the number of signal circuits increases recently,
The present applicant has filed Japanese Patent Application No. 7-91698 and Japanese Patent Application No. 7-91698.
No. 91699, a plate fuse in which fusing bodies 2 made of a metal wire or a metal foil tape are arranged in parallel on both sides of the insulating plate 1 as shown in FIGS. We provide a small integrated fuse consisting of three. When the plate-shaped fuse is used, the fusing bodies 2A, 2B, one circuit, one circuit, can be installed without increasing the installation space and increasing the size.
And can be connected. In FIG. 5, 5 is a fuse cover, 6 is an upper case of the electrical junction box, and 6a is a fuse mounting portion provided in the upper case.

However, if a conventionally used bus bar is used as the circuit on the side of the electrical junction box on the side connected to the plate fuse, the tab pitch of the bus bar cannot be made small as described above, so that a small integrated fuse is used. There is a problem that can not be matched. The above problem is that if the tabs to be connected to the adjacent fusing bodies are not formed from the same busbar but are formed from busbars of different layers, connection with the small integrated fuse is possible even if the internal circuit is used as a busbar, but in that case, There are problems that the number of layers of the bus bar increases, the cost increases, the electric junction box becomes large and complicated, and the degree of freedom in the circuit design of the bus bar decreases.

The present invention has been made in view of the above problems. Therefore, the conductive material of the internal circuit of a large electric junction box such as a junction block is configured to correspond to the amount of current flowing in the circuit, and the external terminals are arranged at a small pitch. The purpose is to be able to connect with the electric connection box and to reduce the size of the electric connection box. It is another object of the present invention to provide an electric junction box having an internal circuit that can be easily connected to fusing bodies arranged in parallel with a small pitch of a small integrated fuse.

[0010]

In order to achieve the above object, the present invention according to claim 1 accommodates an internal circuit in a case consisting of a lower case and an upper case, the internal circuit being a large current circuit, The medium current circuit and the small current circuit are divided into three stages. The large current circuit is a bus bar, the medium current circuit is an electric wire and a pressure contact terminal for press-contacting the electric wire, and the small current circuit is a flexible printed circuit (FPC). (EN) An electric junction box for an automobile, which is characterized in that it is configured.

For example, the above large current circuit has a current of 50 amps or more, the small current circuit has a current of 5 amps or less, and the medium current circuit has a current of 49 amps to 6 amps.

As described above, by changing the conductive material in the internal circuit of the electric junction box according to the amount of electric current, a small connector can be connected to the external load circuit connected to the FPC circuit, and the electric junction box can be miniaturized. be able to. Further, since only the large current circuit is the bus bar, many load side circuits connected to the bus bar via the fuses are electric wires or FPCs, so that the connector to be connected can be made small and high density can be achieved inside the electric junction box. The electric connection box can be miniaturized also from this point.

As a concrete construction of the electric junction box, as described in claim 2, the electric wire of the medium current circuit is wired along a wiring guide provided on an insulating plate arranged inside the case, and The bus bar of the current circuit is arranged at the upper end of the wiring guide to be layered with the electric wire, and the FPC of the small current circuit is folded back at one end face of the insulating plate and arranged along both upper and lower sides of one side of the insulating plate. It is preferable.

As described above, the electric wire is arranged in the recessed portion between the wiring guides provided on the insulating plate, and when the bus bar is placed on the tip surface of the wiring guide, the electric wire is insulated from the electric wire. There is no need to separate layers through the plates, and the space inside the electrical junction box can be used efficiently. Also, FPC
Since it has flexibility, it is folded back to one end surface of the insulating plate on which the electric wires are laid and arranged on both upper and lower surfaces. Therefore, the FPC can be efficiently arranged without taking space. in this way,
Since the characteristics of each conductive material are used to efficiently arrange the inside of the electric junction box, the electric junction box can be downsized.

On the side of the upper surface of the insulating plate on which the FPC is arranged, a fuse box locking portion is provided so as to project, and a fuse box provided with a small integrated fuse mounting portion is attached,
A connector box engaging portion is provided on the side surface of the lower surface of the insulating plate on which the FPC is arranged so as to project the fuse block, and the upper case is provided with an opening through which the fuse block is projected. Has an opening through which the connector box is projected.
(Claim 3)

According to the configuration described in claim 3, the FP
The fuse box and connector boss can be easily attached to the upper and lower surfaces of the insulating plate where C is placed, and the fuse box and connector boss can be projected from the upper case and the lower case,
Fuse and connector to fit in these boxes and F
A PC can be easily connected.

In the small integrated fuse mounting portion of the fuse box, a small integrated fuse in which a fusing body made of a band-shaped conductor is attached to an insulating plate with a predetermined pitch is mounted.
A terminal connected to the electric wire is connected to the upstream contact surface of the fusing body, and a terminal connected to the FPC on the upper surface of the insulating plate is contacted to the downstream connection surface, and a terminal connected to the FPC on the lower surface of the insulating plate. Is projected into the terminal accommodating chamber of the connector box. (Claim 4)

According to the above configuration, the small integrated fuse in which the fusing bodies are arranged in parallel at a small pitch is provided with a terminal connected to the electric wire on the upstream side and a terminal connected to the FPC on the downstream side. Since the internal circuit of the electrical junction box and the fuse are connected, the pitch of the small integrated fuse and the pitch of the terminals of the internal circuit can be matched.

Furthermore, electronic components such as a substrate relay, a noise filter and a diode are mounted on the FPC on the upper surface of the insulating plate and connected to the conductive paths of the FPC. (Claim 5) When the electronic component is connected and attached to the FPC on the upper surface of the insulating plate as described above, the electronic component can be easily installed without taking up a space inside the electric junction box.

A tab is provided on the bus bar for large current to connect to an external terminal, and an external terminal connecting portion is provided to the press contact terminal pressed against the medium current wire to connect to the external terminal. There is.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in detail with reference to the embodiments shown in the drawings. FIG. 1 shows an electric junction box of the present invention, 10 is a lower case, 11 is an insulating plate, 12 is an upper case, 13 is a fuse box provided with a mounting portion 13a of a small integrated fuse 14, and 15 is a small connector mounting portion. A connector box, 16 is an electric wire laid on the upper and lower surfaces of the insulating plate 11, 17 is a pressure contact terminal connected to the electric wire 16, 18 is a bus bar, and 19 is an FPC.

The lower case 10 is provided with an opening 10a for fitting a connector box at one side (left side in the drawing), a terminal mounting hole 10b, and a connector fitting portion 10c projecting to the lower surface side. It is provided.

The insulating plate 11 housed and fixed inside the lower case 10 and the upper case 12 has FPC arranging portions 11a, 1a on both upper and lower surfaces corresponding to the opening 10a of the lower case.
1b. Fuse box locking portions 11d with locking claws 11c protruding from the front and rear sides of the FPC arranging portion 11a on the upper surface side. Similarly, connector box engaging portions 11f with protruding lock claws 11e are provided on both front and rear sides of the FPC placement portion 11b on the lower surface side.

Wiring guides 11g are projected on both upper and lower surfaces of the insulating plate 11 except the FPC placement portions 11a and 11b, and the electric wires 16 are wired in the recesses 11h sandwiched by the wiring guides 11g. ing. For the electric wire 16 to be laid on the lower surface side of the insulating plate 11, the terminal hole 10 of the lower case 10
The pressure contact terminal 17A that is projected from the b to the external connector fitting portion 10c is pressure connected. This pressure contact terminal 17A and electric wire 1
6, the wires 16 are laid, and then the pressure-contact terminals 17A are pressure-connected, and the pressure-contact terminals 17A are connected to the lower case 10.
It may be inserted into the terminal hole 10b of the lower case 1 in advance.
Alternatively, the pressure contact terminal 17A may be set by inserting it into the zero terminal hole 10b, and the electric wire 16 laid on the insulating plate 11 may be pressure contacted.

The electric wires 16 laid on the upper surface side of the insulating plate 11 are brought into pressure contact with pressure contact terminals 17B, and the external terminal connecting portions provided on the upper side of these pressure contact terminals 17B are directly or via the relay terminal 20 to the upper case. The connector is attached to the connector fitting portion 12a and the fuse fitting portion 12b provided on the upper surface of the connector 12, or is electrically connected to the fuse.

Most of the electric wires 16 laid on the upper and lower surfaces of the insulating plate 11 have a single core wire and a medium diameter wire. It should be noted that, in the medium current circuit composed of the electric wire 16, a circuit having a diameter of about 50 amperes has a large-diameter (thick) electric wire.
Circuits close to amps use small diameter (thin) wires.

The wiring guide 11g projecting from the insulating plate 11 for wiring the electric wire along the circuit pattern is shown in FIG.
, The upper end surface 11i is a flat surface, and
The height of the upper end surface 11i of each wiring guide 11g is made uniform, and the horizontal portion 18a of the bus bar 18 is directly mounted on the upper end surface 11i. At that time, the electric wire 16 laid in the recess between the wiring guides 11g and the bus bar 18 mounted on the upper end surface 11i of the wiring guide are layered in the upper and lower layers. Even if the electric wire 16 and the bus bar 18 come into contact with each other, there is no problem because the insulating coating of the electric wire 16 comes into contact with the bus bar 18. The bus bar 18 is provided with a tab 18b bent upward, and the tab 1
8b is connected directly or via a relay terminal to a blade fuse (not shown) fitted to the fuse fitting portion 12b or to a connector fitted to the connector fitting portion 12a.

An opening 12c for fitting a small integrated fuse is provided on one side of the upper case 12. Also,
A lock portion 12e is provided on the peripheral wall 12d of the upper case 12, and is locked and fixed to the locked portion 10e of the lock claw provided on the peripheral wall 10d of the lower case 10.

The FPC 19 for a small current circuit has a structure in which a conductive path 19a made of a metal foil is sandwiched between upper and lower insulating films. As shown in FIGS. 1 and 2, the central portion of the FPC 19 serves as a folded portion 19b and an insulating plate is formed. It is folded back along the left end surface of 11 and the one side portion 19c is the FPC placement portion 1 on the upper surface of the insulating plate 11.
1a, the other side portion 19d is the FPC placement portion 11b on the lower surface of the insulating plate.
To place.

The fuse box 13 is placed on the upper surface of the FPC 19c on the upper surface side of the insulating plate, and in this state, the insulating plate 11 is inserted into the locking recesses 13b provided on both sides of the fuse box 13.
The locking portion 11d is fitted and locked by the locking claw 11c. A small connector (not shown) is attached to the lower surface of the FPC 19d on the lower surface side of the similar insulating plate, and the connector box 1
The engaging recesses 15a provided on both sides of the engaging member 5 are fitted with the engaging portions 11f of the insulating plate 11 and fixed by the engaging claws 11e.

Further, electronic components such as a substrate relay 23, a noise filter 24 formed of a capacitor, and a diode 25 are mounted on the upper surface side FPC 19c and electrically connected to the conductive path 19a by soldering.

The fuse box 13 mounted on the upper surface of the upper FPC 19c has an upper portion protruding from the opening 12c of the upper case 12, and the small integrated fuse 14 is inserted into the fuse mounting portion 13a provided on the upper surface of the fuse box 13 from above. To be done.

As shown in FIG. 3, the small-sized integrated fuse 14 has a fusing body 34 made of a belt-shaped conductive metal foil arranged on both sides of the insulating plate 33 in parallel at a small pitch and laid across the upper end of the insulating plate. The insulating plate 33 is arranged such that the front surface side thereof serves as the upstream (power supply side) contact surface 34a, while the back surface side serves as the downstream (load side) contact surface 34b. The fuse 1
Fuse mounting portion 13 for inserting and retaining 4 from above
The opening 13d of the upper end opening into which the insulating plate 33 is inserted is shown in a.
And the connection terminal fitting recesses 13e and 13f are provided on the opposite sides of the fusing body 34, respectively.

The circuit connected to the upstream contact surface 34a of the fusing body 34 of the small-sized integrated fuse 14 is the circuit formed by the electric wire 16, and the electric wire 16 is formed by using the connecting terminal composed of the pressure contact terminal 37 and the relay terminal 38. And the upstream contact surface 34a are electrically connected. The press contact terminal 37 has a slot 37a for press contacting the electric wire 16 on one end side, and a tab 37 on the other end side.
b. The relay terminal 38 has a substantially rectangular tube shape, and has a shape in which the tab 37b is inserted from the lower end to hold the contact, and a spring-shaped contact piece 38a protruding in a dogleg shape is provided on the upper side thereof. The spring-shaped contact piece 38a is fitted and locked in the recess 13e of the fuse mounting portion 13a, and the fusing body 3
4 is pressed against the upstream contact surface 34a for electrical contact. The chain-shaped pressure contact terminal 37 ′ shown in FIG. 2 may be used for pressure contact with the electric wire 16, and the relay terminal 38 may be fitted to each tab of the pressure contact terminal 37 ′ to be connected to the fuse 14.

The circuit connected to the downstream contact surface 34b of the fusing body 34 of the fuse 14 is the circuit formed by the conductive path 19a of the FPC 19, and the connection terminal 40 is used to make the FP.
The C conductive path 19a and the downstream contact surface 34b are electrically connected. The connection terminal 40 is provided with an elongated plate-shaped electrical connection portion 40a having a lower end projecting like a needle, and the electrical connection portion 40a is fixed to the solder 41 by penetrating the FPC conductive portion 19a. On the other hand, a bent cylindrical body portion 40b is provided on the upper side portion, and a "U" -shaped spring-like contact piece 40c protruding from the inside of the cylindrical body portion 40b to one side portion is provided and also projected to the other side portion. A locking portion 40d is provided. The spring-shaped contact piece 40c is provided in the recess 13 of the fuse mounting portion 13a.
It is engaged with and locked to f and pressed against the downstream contact surface 34b of the fusing body 34 to achieve electrical connection.

A relay terminal 38, which is connected to the electric wire 16 side via the pressure contact terminal 37 in advance, and a connection terminal 40 on the FPC side are previously inserted into the fuse mounting portion 13a, and the fuse 14 is inserted in this state. Connected.

In the conductive path 19a on the upper surface side of the FPC 19,
As described above, while connecting the downstream side of each fusing body 34 of the small integrated fuse 14, the conductive path 19a connected to the downstream side of this fuse fusing body extends to the lower surface side through the folded portion 19b, and the lower surface side. Then, the connection terminal 44 having one end soldered to the conductive path 19a is positioned at the connector fitting portion of the connector box 15. The connector box 15 projects downward from the opening 10a of the lower case 10, and the connector is detachably fitted from the outside.

As described above, the electric wires 16 and the FPC 1 are provided in the fusing body 34 arranged in parallel with the small integrated fuse 14 at a small pitch.
Since the connection terminals connected to 9 are brought into contact with each other, the pitch of the internal circuit of the electric junction box can be matched even if the pitch of the fusing bodies 34 is small.

In the electric junction box, inside the case composed of the lower case 10 and the upper case 12, first, the electric wire 16 for the medium current circuit is laid between the lower case 10 and the insulating plate 11, and the electric wire 16 is provided. Pressure contact terminal 1 which is pressure contacted with
The external terminal connection portion of 7A is projected from the terminal mounting hole of the lower case 10 so that the external terminal can be connected to the external terminal. The electric wire 16 is also laid on the upper surface of the insulating plate 11, and the required portion is pressed-contact terminal 17B.
Then, the external terminal connecting portion of the press contact terminal 17B is projected from the terminal mounting hole of the upper case 12 so that the external terminal can be connected. Wiring guide 11g on the upper surface side of the insulating plate 11
A bus bar 19 is mounted on the upper surface of the above, and a tab bent above the bus bar 19 can be connected to an external terminal through a mounting hole of the upper case 12.

Further, the FPC 19 is folded back and arranged on both upper and lower surfaces of one side of the insulating plate 11, the fuse box 13 is placed on the upper surface thereof, and the small integrated fuse 14 is attached thereto. With the wire 16 on the side
The downstream side is connected to the FPC 19. The FPC 19 connected to the downstream side of the small integrated fuse 14 has the insulating plate 11
One end of the terminal is connected on the lower surface side of the terminal, and the other end of the terminal is positioned at the connector fitting portion of the connector box so that the terminal can be connected to the external terminal.

A large current circuit composed of the bus bar 18;
A medium current circuit consisting of the electric wire 16 and the pressure contact terminal 17, and FP
The combination and connection form of the small current circuit composed of C19 are as shown in FIG. In FIG. 4, the thick line indicates the bus bar 1
8 high current circuit, the middle wire is the wire 16 and the pressure contact terminal 17
The medium current circuit consisting of FPC 19 and the thin line represent the small current circuit consisting of FPC 19. Further, in FIG. 4, a small integrated fuse 1 is indicated by a dotted line.
4 shows that the electric wire 16 and the FPC 19 are connected via the small integrated fuse 14.

As described above, according to the present invention, in a large electric junction box such as a junction block, a bus bar 18 for a large current circuit and an electric wire 16 for a medium current circuit are provided inside the case consisting of the lower case 10 and the upper case 12. Since the press contact terminal 17, the FPC 19 for the small current circuit are properly combined and accommodated, they can be accommodated at a high density,
Therefore, the size of the electric junction box can be reduced. Further, the small integrated fuses 14 in which the fusing bodies 34 are juxtaposed at a small pitch can be matched with the internal circuit of the electric junction box, and the small integrated fuses 14 which have been difficult to mount in the past can be mounted to the junction block. It is possible.

The present invention is not limited to the above-described embodiment, and the conductive path of the FPC 19 is not necessarily the small integrated fuse 1.
It is not limited to the case of connecting to the downstream side of 4, and may be connected to the electric wire 16 without providing a fuse. Also, the electric wire 1
For connection between the fuse 6 and the fuse 14, a spring-shaped contact piece may be provided on the other end of the terminal to be pressure-contacted or crimped with the electric wire 16, and the relay terminal may be unnecessary. In addition, the small integrated fuse 14
Both the upstream side and the downstream side of the FPC may be connected to the FPC.

[0044]

As is apparent from the above description, according to the present invention, the internal circuit of the electric junction box is formed by using three kinds of conductive materials such as a bus bar, an electric wire + a pressure contact terminal, and an FPC according to the amount of energization. Therefore, the internal circuit can be efficiently accommodated in the case of the electric junction box, and the electric junction box can be downsized accordingly.

Since the small current circuit is an FPC and the medium current circuit is composed of an electric wire and a pressure contact terminal, the downstream side of the small integrated fuse is connected to the FPC and the upstream side of the small integrated fuse is connected to a medium diameter electric wire through a connection terminal. It becomes possible to match the pitch of the connection terminals on the internal circuit side with the small pitch of the blowout body of the small integrated fuse, and as a result, it is possible to attach the small integrated fuse to the junction block.
At that time, since the core wire of the upstream electric wire has a medium diameter, the electric wire does not expand when a small diameter thin wire is used, and there is no possibility of causing a problem during assembly. Further, since the wire is a medium diameter wire, the size of the pressure contact terminal is not so small, and a sufficient contact pressure with the wire can be obtained.

Further, conventionally, the relay, the noise filter, and the diode have been fitted in the housing portion of the electric junction box. The above relay, noise filter and diode are FP
Since it is directly mounted on the C, there are advantages that the assembling workability is improved, and the structure of the case of the electric junction box can be simplified and downsized.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an embodiment of an electric junction box of the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is an exploded perspective view showing a state in which the small integrated fuse of FIG. 1 is connected to an electric wire and an FPC.

4 is a circuit diagram showing a part of an internal circuit of the electric junction box of FIG.

FIG. 5 is an exploded perspective view of a conventional example.

6A and 6B are perspective views showing a small integrated fuse.

[Explanation of symbols]

 10 Lower Case 11 Insulation Plate 12 Upper Case 13 Fuse Box 14 Small Integrated Fuse 15 Connector Box 16 Electric Wire 17 (17A, 17B) Pressure Contact Terminal 18 Bus Bar 19 FPC

Claims (6)

[Claims] 1. An internal circuit is housed in a case consisting of a lower case and an upper case, and the internal circuit is divided into three stages of a large current circuit, a medium current circuit and a small current circuit, and the large current circuit is a bus bar. The electric connection box for an automobile, wherein the medium current circuit is composed of an electric wire and a pressure contact terminal which is pressed against the electric wire, and the small current circuit is composed of a flexible printed circuit (FPC). 2. The wires for the medium current circuit are wired along a wiring guide provided on an insulating plate arranged inside the case, and the bus bar for the large current circuit is arranged at the upper end of the wiring guide to be layered with the wires. The electric junction box for an automobile according to claim 1, wherein the FPC of the small current circuit is folded back at one end surface of the insulating plate and arranged along both upper and lower surfaces of one side of the insulating plate. 3. An insulating plate on which the FPC is arranged, while a fuse box locking portion is projectingly provided on a side portion of an upper surface of the insulating plate on which the FPC is arranged, to which a fuse box having a small integrated fuse mounting portion is attached. A connector box locking portion is provided on the side surface of the lower surface of the connector so as to mount the connector box, the upper case is provided with an opening through which the fuse block is projected, and the lower case is projected through the connector box. The electric connection box for automobiles according to claim 2, wherein an opening is provided. 4. The small integrated fuse mounting portion of the fuse box is provided with a small integrated fuse in which a fused body made of a band-shaped conductor is attached to an insulating plate with a predetermined pitch, and an upstream contact surface of the fused body. The terminal connected to the electric wire, the downstream side connecting surface to the terminal connected to the FPC on the upper surface of the insulating plate, and the terminal connected to the FPC on the lower surface of the insulating plate to the terminal accommodating chamber of the connector box. The electric connection box for an automobile according to claim 3, wherein the electric connection box is protruded from the electric connection box. 5. The automobile according to claim 3 or 4, wherein electronic components such as a substrate relay, a noise filter, and a diode are mounted on the FPC on the upper surface of the insulating plate and connected to the conductive path of the FPC. Electrical junction box. 6. The bus bar for large currents is provided with a tab so as to connect to an external terminal, while the press contact terminal press-contacted to the electric wire for medium current is provided with an external terminal connecting portion to connect to the external terminal. The electrical connection box for an automobile according to claim 1, wherein the electrical connection box is used.