JPH08242518A - Branching structure of wiring harness in electrical connection box - Google Patents

Abstract

PURPOSE: To allow performing all branching to wiring harnesses within an electrical connection box, and further corresponding to increase/decrease in the number of branches. CONSTITUTION: Electric wire inlets 16a-16f are formed on the sides of the case 16 of an electrical connection box 15, and connector insertion holes 16g-16l are formed on the top of the case 16 in such a way that they are positioned right above the electric wires in the case 16. Connectors 20g-20l house pressing terminals 21A-21C that are crimped onto the crimp portions 21a of the cores of electric wires 22a-22d to be branched, and that have pressing blades 21b, which cut into the insulating covering on the electric wires 18a-18h in the case, and press against their cores. The connectors 20g-20l are inserted into the connector insertion holes 16g-16l. The pressing terminals 21A-21C are thereby pressed against the cores of the electric wires 18a-18h. Thus, the electric wires to be branched are branched and connected to the electric wires in wiring harnesses through the pressing terminals.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire harness branching structure for an electric connection box, and more particularly, to a splice connection of electric wires constituting the wire harness so that all the wire harnesses can be branched in the electric connection box. It is something to lose.

[0002]

2. Description of the Related Art An electrical junction box used for branching and connecting an automobile wire harness or the like to various electric components has branch connection points concentrated in one place to branch and connect wiring reasonably and economically. With the increasing density of wire harnesses, various types have been developed depending on the vehicle type or application.

In the above-mentioned electric connection box (branch connection box ... junction box), in order to reduce the number of branch electric wires which are 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
5 to 5 are used, it is difficult to make all of the wire harnesses branchable in the branch connection boxes 1 to 5, and the branch electric wires (branch circuits) 6 to 9 are used in the branch connection boxes 1 to 5. It may remain outside.

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

[0005]

However, if the branch electric wire is branched directly to the main wire of the wire harness by splicing or the like, the manufacturing process of the wire harness becomes complicated and the cost increases. Further, if 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 a large number of connector fixing brackets 10 are installed in the case 1.
Since the molding is performed at ~ 5, the die becomes complicated and the number of assembling steps increases, resulting in an increase in cost. Furthermore, the above-described direct connection method or connection method using a connector has a problem in that it cannot easily cope with an increase or decrease in the number of branches corresponding to the grade of the automobile.

The present invention has been made in order to solve the above-mentioned problems of the prior art. By making all of the wire harnesses branchable in the electrical junction box, the cost can be reduced and the number of branches can be easily increased or decreased. It is an object of the present invention to provide a wire harness branching structure for an electric connection box that can be used.

[0007]

In order to achieve the above object, the present invention according to claim 1 is such that all necessary branching on the wire harness is performed by an electric connection box, and an electric wire of a wire harness main line. Through the electric wire insertion port provided on the side of the case of the electric junction box in parallel with the inside of the case, while providing a large number of connector insertion ports on the upper surface of the case to connect with the branching electric wire and press the electric wire. A press-connecting connector accommodating a plurality of press-connecting terminals provided with blades is provided, and the press-connecting connector is inserted into the required connector insertion port, and the press-connecting blades of the received press-connecting terminals press-contact the core wire of the electric wire in the case. According to the present invention, there is provided a wire harness branching structure for an electric connection box, in which a branching electric wire is branched and connected to an electric wire of a wire harness main line via a pressure contact terminal.

The electric wires penetrating inside the case of the electric junction box and arranged in parallel are preferably arranged in a plurality of upper and lower stages so as to intersect in the orthogonal direction. (Claim 2) 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, or a flexible printed circuit in which wire harness main lines are provided in parallel. It may be configured by a flat harness such as the above, and the flat harness may be disposed so as to penetrate the case of the electric junction box. In addition to the connection with the branch electric wire via the pressure contact terminal in the electric connection box, the electric wire of the wire harness main line,
Do not connect to the branch electric wire with a splice. (Claim 3)

A large number of the connector insertion ports are formed on the upper surface of the case, and a pressure contact connector is inserted into a required connector insertion port of the case, and an arbitrary number of connector insertion ports are provided in the pressure contact connector. A pressure contact terminal having an electric wire crimping portion and a pressure contact blade is accommodated to form a required branch circuit. (Claim 4)

[0010]

According to the wire harness branching structure of the present invention as set forth in claim 1, the main wire of the wire harness is pierced into the electric connection box through the wire inlet on the side surface of the case, and at the same time as the branching wire. By inserting the press-connecting connector containing the connected press-connecting terminal into the connector insertion port on the top surface of the case, the press-connecting blade of each press-connecting terminal housed in the press-connecting connector cuts the insulation coating of the wire harness wire to the core wire. By press contacting, the branch electric wire is automatically branched and connected to the electric wire of the wire harness through the press contact terminal.

In this way, the branch electric wire is connected to the main wire through the pressure contact terminal in the electric connection box to perform all necessary branching on the wire harness. Therefore, the branch electric wire is spliced from the wire harness. Need not be directly branched, a large number of branch connection connectors and relay connectors are unnecessary, and it is not necessary to form a connector fixing bracket in the case.

When the electric wires penetrating the inside of the case of the electric junction box are arranged in a plurality of upper and lower stages so as to intersect with each other in the orthogonal direction, as described in claim 2, the pressure contact is made at a portion not vertically laminated. The pressure contact terminal housed in the connector is pressure connected to the wire. By arranging the electric wires in this way, it is possible to arrange them in a high density inside the electric junction box, and accordingly it is also possible to increase the number of branch circuits provided in one electric junction box.

According to a third aspect of the present invention, the wire of the wire harness main line is connected only to the branch electric wire via the pressure contact terminal in the electric connection box, and is not connected to the branch electric wire by a splice or the like. Then, the manufacturing process of the wire harness can be simplified.

According to a fourth aspect of the present invention, a large number of the connector insertion openings are formed on the upper surface of the case, and the pressure contact connector is inserted only in the necessary connector insertion opening, and
If the press-connecting terminal is inserted only in the required terminal accommodating portion of the press-connecting connector, and the press-connecting terminal has an arbitrary number of wire crimping parts and press-connecting blades, the branch circuit will differ due to different grades in the same vehicle model. Can be dealt with in all cases, and the electrical junction box is extremely versatile.

[0015]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. As shown in FIGS. 1 and 3, a branch connection box (junction box) 15 which is an electrical connection box includes an upper case 16 and a lower case 17 made of synthetic resin,
A large number of electric wire inlets 16a to 16f (six in the figure) for penetrating the electric wires 18a of the wire harness trunk lines W / H-1 to W / H-3 in a parallel state at appropriate positions on the side surface of the upper case 16. Are provided facing each other.

On the upper surface of the upper case 16, the upper case 16 is passed through the electric wire introducing ports 16a to 16e.
Each wire harness main line W / H-1 to W /
Connector insertion ports 16g to 16l (six in the figure) located right above the H-3 electric wires 18a, ... Are provided.

On the other hand, in each of the connector insertion openings 16g to 16l of the upper case 16, there are branch pressure contact connectors 20g to 20l (see FIG. 2) from above depending on the need, that is, depending on the branch circuit configuration. Is inserted. Lock claws that are locked by engaging with lock holes 16p formed in the side surfaces of the upper case 16 when inserted into the connector insertion openings 16g to 16l on the side surfaces of the branch press-connecting connectors 20g to 20l. 20p is formed.

Further, each of the above pressure contact connectors 20g to 20l
Is provided with a pressure contact terminal accommodating portion 20q penetrating in the vertical direction. The pressure contact terminals 21A to 21C accommodated in the pressure contact terminal accommodating portion 20q include two branch electric wires 22.
The core wires of the terminals a and 22b are provided with two crimp parts 21a and 21a.
By crimping each to the crimping terminal 21A having two crimping blades 21b and 21b and the core wire of the end of one branching electric wire 22c to one crimping portion 21a to press one crimping blade 21b. Pressure contact terminal 21B having one and one branch electric wire 2
2d is crimped to one crimping part 21a, and two crimping blades 2
A pressure contact terminal 21C having 1b and 21b is provided. In addition to this, pressure contact terminals having different numbers of crimping portions and pressure contact blades can be appropriately used.

Further, the pressure contact connector 20 for each branch described above.
Each of the connector insertion ports 16g to
When inserted in 16 l, each wire 18a of each wire harness trunk line W / H-1 to W / H-3 in the branch connection box 15 ...
Recesses 20r, ...

In the electric connection box having the above structure,
Wire harness main line W introduced into the branch connection box 15 through the wire introduction ports 16a to 16f of the upper case 16
/ H-1 to W / H-3 are wired in the electric junction box 15 by penetrating the respective electric wires 18a, ... In a parallel state. On the other hand, required pressure contact terminals 21A to 21C are previously accommodated in the pressure contact terminal accommodating portions 20q of the pressure contact connectors 20g to 20l, and are locked by the lance portions of the pressure contact terminal accommodating portions 20q so as not to be pulled out.

20 g to 20 l of the pressure contact connector for branching
The required connector insertion port 16g of the upper case 16
16l, and the lock claw 20p is engaged and locked in the lock hole 16p. Each press-connecting connector 20g to 20
3, the pressure contact blades 21a of the pressure contact terminals 21A to 21C are connected to the corresponding wires 18a and 18b of the wire harness main line W / H-1 as shown in FIG. , 18d, 18g, 18h are pressed into contact with each core wire while cutting the insulating coating.

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

In this way, various branching of each wire harness main line W / H-1 to W / H-3 can be achieved in the electric junction box 15, so that each wire harness W / H-1 to W.
./H-6 does not need to be branched directly from the branching electric wires 22a, ... by splice connection or the like, and the manufacturing process of each wire harness trunk line W / H-1 to W / H-3 is simplified, so that the manufacturing cost is reduced. It will be cheaper.

Further, it is not necessary to use a large number of branch connection connectors and relay connectors as in the prior art, and moreover, it is not necessary to form a large number of connector fixing brackets on the upper case 16, so that the mold can be simplified and assembled. Since the number of steps is reduced, the parts cost, die cost, and assembly cost are reduced. Furthermore, the press-connecting connector for branching 20g to 2
It is possible to easily accommodate the increase or decrease in the number of branches corresponding to the grade of the vehicle by accommodating the pressure contact terminals 21A to 21C having different numbers of the crimping portions 20a and the pressure contact blades 20b in 0l or changing the accommodating position, and the versatility is improved. Get better

[0025]

As is apparent from the above description, in the wire harness branching structure of the electric connection box of the present invention, the wires of the wire harness main line are passed through the case through the wire inlet of the case to branch the wires. By inserting a press-connecting connector, which is connected to an electric wire and has a required number of press-connecting terminals having press-connecting blades, into the connector insertion port provided in the case, the press-connecting blades of the press-connecting terminals are used to insulate each wire of the wire harness trunk line. By making pressure contact with the core wire while making a cut, the branch wire can be automatically branched and connected to the wire of the wire harness main line via the pressure contact terminal.

In this way, the branching electric wire can be branched to the wire harness main line that penetrates into the electric junction box, and therefore the branch electric wire is directly branched from the wire harness by splicing. It is not necessary to do so, the manufacturing process of the wire harness can be simplified, and the cost can be reduced. Further, a large number of branch connection connectors and relay connectors are not required, and since it is not necessary to mold the connector fixing bracket in the case, the mold is simplified and the number of assembling steps is reduced, so that the cost can be reduced. .

Further, as described in claim 2, while the electric wires are arranged at high density inside the case of the electric junction box,
As described in claim 4, a plurality of connector insertion openings are formed by inserting a pressure contact connector into a necessary connector insertion opening of the connector, and the pressure contact connector to be inserted has a different number of crimp portions or pressure contact blades. It is possible to easily cope with the increase or decrease in the number of branches corresponding to the grade of the vehicle by simply changing the accommodating position of the pressure contact terminal while accommodating the, and increasing the versatility.

[Brief description of 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 a branch connector has been inserted.

3 is a cross-sectional view of the branch connection box corresponding to line AA in FIG.

FIG. 4 is a branch circuit diagram of a wire harness in which a conventional branch electric wire is connected via a branch connection box.

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

[Explanation of symbols]

 15 Branch Connection Box 16 Upper Case 16a to 16f Electric Wire Inlet 16g to 16l Connector Insert 17 Lower Case 18a to 18h Electric Wire 20g to 20l Branch Connector 21A to 21C Pressure Contact Terminal 21a Crimping Portion 21b Pressure Contact Blade 22a to 22d Branch Wire W / H wire harness

Claims (4)

[Claims] 1. An electric junction box for performing all necessary branching on a wire harness, wherein the wire of the wire harness main line is introduced into the case through an electric wire insertion opening provided opposite to the side surface of the case of the electric junction box. While penetrating in parallel, a number of connector insertion openings are provided on the top surface of the case to provide a press-connecting connector that accommodates a plurality of press-connecting terminals that are connected to branch wires and that also have wire press-connecting blades. The branch electric wire is branched and connected to the electric wire of the wire harness main line by inserting the wire into the connector insertion opening of the housing and press-contacting the core wire of the electric wire in the case with the press-connecting blade of the housed press-connecting terminal. A wire harness branching structure for the electrical junction box. 2. The wire harness for an electric connection box according to claim 1, wherein the electric wires penetrating inside the case of the electric connection box and arranged in parallel are arranged in a plurality of upper and lower stages so as to intersect in an orthogonal direction. Branch structure. 3. The wire of the wire harness main line is not connected to a branch electric wire by a splice or the like, other than the connection to the branch electric wire via a pressure contact terminal in an electric connection box. Wire harness branching structure of the described electrical junction box. 4. A plurality of the connector insertion ports are formed on the upper surface of the case, and a pressure contact connector is inserted into a necessary connector insertion port of the connector, and a desired terminal accommodating portion in the pressure contact connector is provided with an arbitrary portion. The wire harness branching structure for an electrical junction box according to claim 1, wherein a crimping terminal having a number of wire crimping portions and crimping blades is housed to form a required branching circuit.