JP2985709B2 - Wiring harness branch structure of 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 a wiring harness branching structure of an electric junction box, and more particularly, to a splice connection or the like of an electric wire constituting a wire harness so that all branching of the wiring harness can be performed in the electric junction box. It is something to lose.

[0002]

2. Description of the Related Art An electrical junction box used for branch connection of an automobile wire harness or the like to various electric components has a branch connection point concentrated at one place, and the wiring is rationally and economically connected. With the increase in the density of wire harnesses, various types have been developed according to vehicle types or applications.

[0003] In the electric junction box (branch junction box ... junction box) as described above, in order to reduce the number of branch wires directly branched from the main wire of the wire harness by splice connection or the like, a branch connection as shown in FIG. Box 1
However, it is difficult to make all the branches of the wire harness in the branch connection boxes 1 to 5, and the branch wires (branch circuits) 6 to 9 are connected to the branch connection boxes 1 to 5. May remain outside.

The branch wires 6 to 9 that cannot be branched in the branch connection boxes 1 to 5 are directly branched from the wire harness by using a splice connection, or as shown in FIG. The branch connector 11 for each of the branch wires 6 to 9 is fixed to the connector fixing bracket 10 on the side surface of the fifth branch 5, and the branch connection connector 12 containing the terminal connected to the terminal of each of the branch wires 6 to 9 is provided. By inserting the connector 12 into the connector insertion portion of each of the branch connection boxes 1 to 5, each of the branch wires 6 to 9 is branched and connected to the wire harness.

[0005]

However, if the branch wire is directly branched to the main line of the wire harness by splice connection or the like, the manufacturing process of the wire harness becomes complicated and the cost increases. When the branch connection connector 12 and the relay connector 11 are used, the manufacturing process of the wire harness is simplified, but the number of the connectors 11 and 12 is increased, and the large number of connector fixing brackets 10 are attached to the case 1.
Since the mold is formed to a size of ~ 5, the mold becomes complicated, and the number of assembling steps is increased, so that the cost is increased. Further, the direct connection method and the connection method using a connector have a problem that the number of branches corresponding to the grade of the vehicle cannot be easily increased or decreased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and all the branches of a wire harness can be formed in an electric connection box, thereby reducing costs and easily increasing or decreasing the number of branches. It is an object of the present invention to provide a wiring harness branching structure of an electric connection box that can be used.

[0007]

In order to achieve the above object, the present invention is to perform all necessary branches on a wire harness with an electric connection box. Through the wire insertion port provided facing the side of the case inside the case in parallel, and
The wire group to be penetrated in this parallel state was vertically crossed in a plurality of upper and lower stages, while a large number of connector insertion ports were provided on the upper surface of the case, and crimping connection was performed to the end of the branching wire, and a wire pressing blade was provided. A press-connecting connector accommodating a plurality of press-connecting terminals is provided, and the press-connecting connector is inserted into the required connector insertion opening, and at a place where wires are not vertically stacked in the case, the press-connecting terminal housed in the press-connecting connector A wire harness branching structure of an electric junction box, wherein a branch wire is branched and connected to a wire of a wire harness main line via a pressure welding terminal by being pressed against a core wire of the wire with a pressure welding blade. I have.

The electric wires may be inserted in grooves formed in parallel on the inner surface of the bottom wall of the case and wired in parallel.
The wiring harness main line may be formed of a flat harness such as a flexible printed circuit in which electric wires are provided in parallel, and the flat harness may be arranged so as to penetrate the case of the electric connection box. The electric wire of the wire harness main line is not connected to the electric wire for branching by a splice or the like other than to the electric wire for connection via the press-connecting terminal in the electric connection box.

A large number of the connector insertion ports are formed on the upper surface of the case, and a press-connecting connector is inserted into a necessary one of the connector insertion ports. A press-connecting terminal having a wire crimping portion and a press-connecting blade is housed to form a required branch circuit.

[0010]

According to the wire harness branch structure of the present invention, the trunk wire of the wire harness is penetrated into the electric connection box through the wire inlet on the side surface of the case, and is connected to the branch wire. By inserting the insulation displacement connector containing the connected insulation displacement terminals into the connector insertion slot on the upper surface of the case, the insulation displacement coating of the insulation harness of the wire of the wire harness allows the insulation displacement coating of the wire harness wires to be cut into the core wire. By crimping, the branch wire is automatically branched and connected to the wire of the wire harness via the crimp terminal.

As described above, in order to connect the branch wires to the main wires via the press contact terminals in the electrical connection box and perform all necessary branching on the wire harness, the branch wires are spliced from the wire harness. Is not required, and a large number of branch connection connectors and relay connectors are not required, and it is not necessary to form a connector fixing bracket on the case.

Further, as described above, when the electric wires penetrating inside the case of the electric connection box are arranged in a plurality of upper and lower stages so as to intersect in the orthogonal direction, the electric wires inside the press-connecting connector are not vertically stacked. The pressure contact terminal housed in the wire is press-connected to the electric wire. By arranging the electric wires in this manner, high-density arrangement can be performed inside the electric connection box, and accordingly, the number of branch circuits provided in one electric connection box can be increased.

As described above, if the wire of the wire harness trunk is connected only to the branch wire via the press-connecting terminal in the electric junction box, and is not connected to the branch wire by a splice or the like, Can be simplified.

In addition, a number of the above-mentioned connector insertion ports are formed on the upper surface of the case, and a press-connecting connector is inserted only into a necessary one of the connector insertion ports, and only a required terminal accommodating portion in the press-connecting connector is pressed. Insert the terminal, and
If this crimping terminal has an arbitrary number of wire crimping parts and crimping blades, it can handle all cases such as different branch circuits due to different grades in the same model, and the electric connection box is It is very versatile.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. As shown in FIG. 1 and FIG. 3, the junction box (junction box) 15 as an electric connection box includes an upper case 16 and a lower case 17 made of synthetic resin.
Numerous electric wire inlets 16a to 16f (six in the figure) penetrate the electric wires 18a of the wire harness trunks W / H-1 to W / H-3 in parallel at appropriate places on the side surfaces of the upper case 16. Are provided facing each other.

The upper case 16 is provided on the upper surface of the upper case 16 through the wire inlets 16a to 16e.
Each wiring harness trunk line W / H-1 to W /
Connector insertion ports 16g to 16l (six in the figure) located right above the electric wires 18a of H-3 are provided.

On the other hand, each of the connector insertion openings 16g to 16l of the upper case 16 is provided with a press-connecting connector 20g to 20l for branching from above (see FIG. 2) from above according to need, that is, according to a branch circuit configuration. Inserted. A lock claw which is engaged with a lock hole 16p formed in a side surface of the upper case 16 when the connector is inserted into each of the connector insertion openings 16g to 16l. 20p is formed.

Each of the press-connecting connectors 20g to 20l
Is provided with a press-contact terminal accommodating portion 20q which penetrates vertically. As the press contact terminals 21A to 21C accommodated in the press contact terminal accommodating portion 20q, two branch wires 22 are used.
a, 22b are connected to two crimping portions 21a, 21a.
Respectively, and a crimp terminal 21A having two crimping blades 21b, 21b and a core wire of a terminal of one branching wire 22c are crimped to one crimping portion 21a to form one crimping blade 21b. Terminal 21B having one and one branching wire 2
2d is crimped to one crimping portion 21a, and two crimping blades 2
A press contact terminal 21C having 1b and 21b is provided. In addition to the above, press contact terminals having different numbers of crimping portions and press contact blades can be appropriately used.

Further, the press-connecting connector 20 for each branch described above.
g to the lower surface of 20 l, each connector insertion opening 16 g ~
16l, the electric wires 18a of the respective wiring harness trunks W / H-1 to W / H-3 in the branch connection box 15 are connected.
Are formed to straddle the groove.

In the electric junction box having the above configuration,
The wire harness trunk W introduced into the branch junction box 15 through the electric wire introduction ports 16a to 16f of the upper case 16
/ H-1 to W / H-3 are wired inside the electric connection box 15 through the respective wires 18a,. On the other hand, the required press-connecting terminals 21A to 21C are pre-stored in the press-contact terminal receiving portions 20q of the press-connecting connectors 20g to 20l, and are locked by the lances of the press-contact terminal receiving portions 20q so as not to be pulled out.

The above-mentioned press-connecting connector for branching 20g to 20l
To the required connector insertion opening 16 g of the upper case 16.
16l, and the lock claw 20p is locked by engaging with the lock hole 16p. Each of the press-connecting connectors 20 g to 20
3, the press-connecting blades 21a of the press-connecting terminals 21A to 21C are connected to the corresponding electric wires 18a, 18b of the wire harness trunk W / H-1 as shown in FIG. , 18d, 18g, and 18h are pressed against the respective core wires while cutting the insulating coatings.

Thus, by simply inserting the press-connecting connectors 20g to 20l for branching into the required connector insertion openings 16g to 16l of the upper case 16, predetermined electric wires of the respective wire harness trunks W / H-1 to W / H3 can be obtained. 18a, 18b,
The branch wires 22a to 22d can be automatically and branch-connected to 18d, 18g, and 18h via the press contact terminals 21A to 21C.

As described above, various branching of each of the wire harness trunks W / H-1 to W / H-3 can be achieved in the electric connection box 15, so that each of the wire harnesses W / H-1 to W / H-3 can be achieved.
./H-6, the branch wires 22a,... Do not need to be directly branched by splicing or the like, and the manufacturing process of each of the wire harness trunks W / H-1 to W / H-3 is simplified. Become cheap.

Further, a large number of branch connection connectors and relay connectors as in the prior art are not required, and since there is no need to form a large number of connector fixing brackets on the upper case 16, the mold is simplified and the assembly is facilitated. Since the number of processes is reduced, parts costs, mold costs, and assembly costs are reduced. Furthermore, the press-connecting connectors for branching 20g-2g
By simply housing the crimping terminals 21A to 21C having different numbers of crimping portions 20a and crimping blades 20b in 0l or changing the housing position, the number of branches corresponding to the grade of the vehicle can be easily increased or decreased, and versatility can be improved. Become good.

[0025]

As is apparent from the above description, in the wiring harness branch structure of the electric connection box of the present invention, the electric wire of the wiring harness trunk is passed through the electric connection box through the electric wire introduction port of the case. The crimping connector of the crimping terminal is inserted into the connector insertion port provided in the case, and the crimping blade of the crimping terminal is connected to the electric wire for use and the crimping connector having the crimping terminal having the crimping blade is inserted into the connector insertion opening. The branch wire can be automatically branched and connected to the wire of the wire harness main line via the press-connecting terminal.

As described above, since the branching wire can be branched to the wire harness trunk penetrated into the electric junction box, it is not necessary to directly branch the branch wire by splice connection from the wire harness, and it is possible to manufacture the wire harness. The process is simplified and the cost can be reduced. In addition, a large number of branch connection connectors and relay connectors are not required, and since there is no need to form a connector fixing bracket in the case, the mold is simplified, and the number of assembly steps is reduced, so that the cost can be reduced. .

Further, the wires are arranged at high density in upper and lower stages in the direction perpendicular to the inside of the case of the electric connection box, and press-fit to the necessary connector insertion holes among the many formed connector insertion holes. It is easy to increase or decrease the number of branches corresponding to the grade of the car by simply inserting the connector and accommodating the insulation displacement terminals with different numbers of crimping parts and insulation displacement blades in the insulation displacement connector to be inserted and changing the housing position of the insulation displacement terminal , And versatility can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a branch connection box of the present invention before a branch connector is inserted.

FIG. 2 is a perspective view of the branch connection box of FIG. 1 after insertion of a branch connector.

FIG. 3 is a cross-sectional view of a branch junction box corresponding to line AA in FIG. 2;

FIG. 4 is a branch circuit diagram of a conventional wire harness to which branch wires are connected via a branch connection box.

FIG. 5 is a perspective view of a conventional branch connection box.

[Explanation of symbols]

 Reference Signs List 15 branch connection box 16 upper case 16a to 16f electric wire introduction port 16g to 16l connector insertion port 17 lower case 18a to 18h electric wire 20g to 20l branch connector 21A to 21C press-connecting terminal 21a crimping part 21b press-connecting blade 22a to 22d branch wire W / H wire harness

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-342968 (JP, A) JP-A-2-87919 (JP, A) JP-A-4-51480 (JP, A) 103168 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) H02G 3/08-3/20

Claims (1)

(57) [Claims] 1. All necessary branches on a wire harness are electrically connected.
The connection is performed in the electrical connection box.
Parallel to the inside of the case through the wire insertion port provided opposite
Penetrate in a state, And an electric wire penetrated in this parallel state
While the group crosses the orthogonal direction in a plurality of upper and lower stages,  A number of connector insertion holes are provided on the top
ofCrimp to terminalPressing end connected and provided with wire pressing blade
A press-connecting connector accommodating a plurality of connectors.
Insert the connector into the required connectorIn the above case
At the place where the wires are not stacked up and down,
InsideWith the press-contact blade of the press-contact terminal housed, press-contact with the core wire of the electric wire
Press-fit terminal on the wire of the wire harness main line.
Characterized in that the branching wire is branched and connected via
The wiring harness branch structure of the electrical junction box.