JPH0442722A - Electrical joint box to be connected directly with wires with wire - Google Patents

Abstract

PURPOSE:To eliminate bus bars requiring complex routing by pulling in wires and arranging in parallel in a plurality of insulating cases provided with connectors, providing a terminal containing section having a vertical layer through-hole, laminating the insulating cases and then performing layer connection integrally. CONSTITUTION:An electrical joint box A is constructed by laying a plurality of wires 15 in parallel in a plurality of insulating cases 14 and then laminating the cases 14. A short bar 23 connected with a layer connection press terminal 19 is contained, as a connector terminal, in an external connection connector 16. The layer connection press terminal 19 comprises a wire press part and an electrical contact part formed continuously on a substrate. The insulation case 14 for each layer is provided with a terminal containing part having a vertical layer through-hole corresponding to the arrangement of the wires 15. The press terminals 19 are contained in the terminal containing part and then the wire 15 is pressed. When the short bar 23 is pierced with the insulation cases 14 being laminated, layer connection is achieved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electrical connection box used for connecting electrical circuits of a motor vehicle, and particularly to a direct connection type electrical connection box.

[Conventional technology]

A wire harness is generally constructed by combining a plurality of sub-harnesses including branch connections.

Therefore, circuit boards consisting of a plurality of bus bars and insulating plates, which allow easy formation of branch circuits, are often used in a stacked manner as internal circuits of electrical connection boxes.

However, the circuit configuration becomes complicated with only busbars, so
There are cases where external electric wires are drawn directly into the box (Utility Model No. 63-
1) Publication No. 3423).

FIG. 15 and FIG. 16 show an example. In the figure, IA
is an upper cover, and IB is a lower cover, in which a laminated circuit board 4 consisting of a bus bar 2 and an insulating board 3 is housed, and a plurality of electric wires 5 are connected to sub-wires on the first layer circuit board. It is directly pulled in and routed from the harness W.

On the other hand, a plurality of external connection connectors 6, a fuse connector 7, and a relay connector 8 are provided on the upper cover IA. These connectors 6 to 8 accommodate and arrange terminals 9 of electric wire terminals and tabs 10 of wire terminals directly or via female-male relay terminals 1), and connect terminals of fuses 12, relays 13, etc. are connected to each other.

Terminal connectors each having a sub-wire harness as a unit are fitted and connected to the group of external connection connectors 6.

[Problem to be solved by the invention]

The partially retractable electrical junction box for electric wires shown in Figures 15 and 16 has the following problems.

(1) Since the terminal 9 is crimped to the end of the electric wire 5 and the terminal 9 is led out to the connectors 6 to 8, the electric wire can only be routed above and below the laminated circuit board 4.

(2) Although the bus bar 2 is convenient for forming a branch circuit, a plurality of tabs 10 from different layers must be accommodated and arranged in, for example, one connector 6, making the circuit layout complicated. .

(3) Since the busbar circuit configuration differs depending on the vehicle type and grade, it is necessary to prepare many types of busbar circuit boards. If a part of the circuit is changed or added, it will affect the circuit patterns of other layers due to the laminated structure, so it is necessary to redo the circuit design of the bus bar, which increases the cost.

(4) Since the external connection connectors 6, fuse connectors 7, etc. are arranged in a scattered manner, the wiring efficiency of the electric wires 5 and bus bars 2 is poor.

SUMMARY OF THE INVENTION An object of the present invention is to provide a wire-direct connection type electrical connection box that can eliminate the above-mentioned drawbacks.

[Means to solve the problem]

In order to achieve the above object, the electric wire direct connection type electric junction box of the present invention has a plurality of insulating cases provided with fuse connectors and/or relay connectors, respectively, as described in claim (1). A plurality of electric wires constituting the sub-harness are drawn in and arranged in parallel, and a terminal accommodating portion having an interlayer connection hole penetrating vertically in accordance with the arrangement of the electric wires is provided at a predetermined position of each insulating case, and the terminal accommodating portion is Insert the insulation displacement terminal for interlayer connection that presses into the electric wire, stack these insulation cases, connect the insulation displacement terminal for interlayer connection of each case together with a short bar, and perform the interlayer connection.
The present invention is characterized in that the fuse connector and/or relay connector are erected on the side opposite to the wire lead-in side of each insulating case, and these connectors are arranged in a concentrated manner in a stepwise manner.

The insulating cases to be laminated can also be placed back to back in a vertically symmetrical or point symmetrical manner (claim (2)).

Further, a part of the insulating case can be formed by being divided in the direction in which the electric wires are arranged (Claim (3)).

The fuse connector or the relay connector can have a structure in which parts are divided into vertically adjacent insulating cases and combined together (claim (4)).

When connecting an external wire harness, such as a power line or a ground line, to the electrical connection box according to the present invention, the interlayer connection short bar can be used as the connector terminal (claim (5)).

[For production]

According to the present invention, the internal circuit of the electrical junction box is composed of sub-harness electric wires that are drawn into the insulating case, and it is possible to eliminate the conventional bus bar that requires complicated routing.

Connectors such as fuse connectors and relay connectors are centrally arranged on one side of each insulating case (the opposite side to the wire lead-in side), and the wires and terminals (insulation terminals) must be connected independently. , which improves work efficiency.

Since each layer is formed for each sub-harness using an insulating case, circuit changes can be made depending on vehicle type, grade, etc. without affecting other layers. This becomes easier by dividing the insulating case, and unnecessary wiring of electric wires can be eliminated.

In addition, by dividing a part of the fuse connector or relay connector between vertically adjacent insulating cases and forming them so that they can be combined, for example, one electric wire can be shared as an input electric wire for the upper and lower layers. Wiring efficiency is improved.

Hereinafter, the structure and operation of the present invention will be specifically explained with reference to drawings showing embodiments.

〔Example〕

FIG. 1 shows a partially cutaway perspective view of a wire-direct connection type electrical connection box A according to the present invention.

The electrical connection box A includes a plurality of insulating cases 14. ．． 14□～1
4a, a plurality of electric wires 15 are arranged in parallel at a predetermined pitch for each sub-harness constituting the wire harness, and these wires are laminated.

First layer insulation case 14. A plurality of connectors 16 for connecting to an external wire harness are provided on the wire lead-in side, and a plurality of fuse connectors 17 and relay connectors 18 are provided on the other side.

The second layer insulation case 14□ is the first layer insulation case 14
1<D'l), and protrudes by the length l on the side opposite to the wire lead-in side.

This protrusion 1) has a second layer of insulating case 14. A necessary fuse connector 17 (and/or relay connector) is provided. Hereinafter, as shown in FIG. 2, the insulating cases 14.144, 145 of the next layer are lZ, I! 2.

By forming it as long as 7!4, it is layered in a stepped manner,
Each protrusion! ! 2 to 14 are provided with fuse connectors 17 and/or relay connectors 18 necessary for each layer. In FIG. 2, the portion indicated by l is the insulating case 14 of each layer. ~146, and the interlayer connections described later are performed here. In addition, the portion represented by lo is the first layer of the insulating case 14. Fuse connector 1
7. This is the area where the relay connector 18 is provided.

The external connection connector 16 accommodates, as a connector terminal, a short bar 23 that is mainly connected to the interlayer connection pressure contact terminal 19 .

As shown in FIG. 3, the interlayer connection pressure contact terminal 19 is formed by connecting a wire pressure contact portion 21 and an electric contact portion 22 to a substrate 20. The wire press-fitting section 21 has a pair of press-fitting pieces 21a that stand up on both ends of the substrate 2o, and the pieces 21a have a wire press-fitting groove 21.
b has been established.

The electrical contact section 22 consists of a rectangular cylindrical bar receiving section 22a connected to one side of the substrate 20 by bending, and an elastic tongue piece 22b provided on the inner wall thereof.

As representatively shown in FIGS. 3 and 4, the insulating case 14 of each layer. A terminal accommodating portion 24 having an interlayer connection hole 24a penetrating vertically is provided at a predetermined position corresponding to the arrangement of the electric wires 15.

The interlayer connection pressure contact terminals 19 are accommodated in these terminal accommodating portions 24, and the electric wires 15 are press-connected to the wire press-fitting grooves 21b of the pressure contact pieces 21a in each wire pressure contact portion 21.

Then, when the short bar 23 is inserted into the bar receiving part 22a of the electrical contact part 22 in a state in which the insulating cases 141 to 146 of each layer are stacked, interlayer connection is achieved through contact with the elastic tongue piece 22b. Ru.

The short bar 23 has tabs 23a formed on both ends to be used as a connector terminal, but when used simply for interlayer connection, a short bar 23 with a stopper 23b protruding from one end is used as shown by the two-dot chain line. It is better to use 23'.

The fuse connector 17 and the relay connector 18 mainly include a female pressure contact terminal 25 that is pressure-connected to the electric wire 15.
is accommodated.

As shown in FIG. 5a, the pressure contact terminal 25 is formed by connecting an electrical contact portion 27 to one end of a substrate 26 and an electric wire pressure contact portion 28 to the other end. The electrical contact portion 27 includes a rectangular tubular tab receiving portion 27a, an elastic tongue piece 27b provided on the inner wall thereof, a stopper 27c for regulating the tab insertion depth, and a lance that engages with the inner wall of the terminal accommodating chamber in the connector. It is equipped with 27d. Further, the electric wire press-contacting section 28 is made up of a pair of press-contact pieces 28b having a wire regular-sized groove 28C on both sides of an L-shaped bent piece 28a at the other end of the substrate 26, and a pair of press-contact pieces 28b erected downward.

These pressure contact terminals 25 are connected to the insulation cases 141 to 1 of each layer.
46 to the desired electric wire 15 and the electric wire pressure welding portion 28
The electrical contact portions 27 are accommodated in respective terminal accommodating chambers of the predetermined connectors 17 and 18, and are locked by the lances 27d.

Further, a modification of the pressure contact terminal 25 is shown in FIG.

As shown in C, the pressure welding piece 2 in the wire pressure welding section 28
Pressure contact terminals 25' and 25'' having terminals 8b' and 28b'' arranged parallel to the substrate 26 are also used. Board 26 and pressure contact piece 28b
By providing the extending piece 28d between the connector 17 and the electric wire 15, it is possible to select a press-contact terminal that matches the distance between the connector 17 and the electric wire 15.

As described above, the electrical junction box A according to the present invention has the electric wire 15
Insulation case 14 in which the group is drawn and wired in sub-harness units
．． It is constructed by laminating 146 to 146 layers.

The 15 groups of electric wires are simply arranged in parallel,
It does not require complicated pattern design like conventional busbars.

Each insulation case is stacked with the -example (wire lead-in side) aligned,
The other side is formed to protrude stepwise, and this protrusion (1+-
1t to zn), fuse connectors 17 and relay connectors 18 necessary for each layer are centrally arranged. therefore,
Terminals to be connected to the electric wires 15 of each layer (insulation terminals 25, 25
', 25'') can be assembled independently from other layers of insulating cases, resulting in good workability.

The interlayer connection required between the insulation cases of each layer is made using a plurality of insulation displacement terminals 1 for interlayer connection at the common overlapping part (1).
9 and short par 23.23'. One end (tab 23a) of the shortener 23 is accommodated and arranged as a connector terminal of the connector 16, so that it can be connected to a power supply line or a ground line to the electrical connection box A.

If the vehicle model or grade is different, the number of laminated insulation cases (14I to 146) for each sub-harness may be increased or decreased, or the arrangement of connectors 17 and 18 or the terminal accommodating portion 24 may be changed.
By using insulating cases with different positions and numbers of (interlayer connection holes 24a), it is possible to deal with this problem without affecting the insulating cases of other layers.

FIGS. 6 and 7 each show an example of an improvement to the electrical connection box described above.

In FIG. 2, the part indicated by diagonal lines S is for providing the connectors 17 and 18 of the insulating case of each layer in a stepped manner.
In reality, this becomes dead space that is not used for wiring, and the electrical connection box becomes larger accordingly. The electrical connection boxes B and C shown in FIGS. 6 and 7 have the dead space (S) reduced.

The electrical connection box B shown in FIG. Second. Third layer insulation case 141. 142. 4th vertically symmetrical to 143. Fifth. 6th layer insulation case 14', 145'
, 146' are stacked back to back. In this case, the dead space is reduced by half compared to FIG. 2, as indicated by the diagonal line S'.

The electrical connection box C shown in FIG. Second. Third layer insulation case 14. ．． 14□, 4th point symmetrical to 143
．． Fifth. 6th layer insulation case 144'14'S', 14
In this case as well, the dead space is greatly reduced as shown by the diagonal line S''.

FIG. 8 shows another embodiment of the electrical junction box according to the invention.

In the figure, the third layer insulation case 14. The fuse connector 17 ' has two fuse insertion holes I7a and 17b, and one insertion hole 17b is divided in half. The connector part 17' that is combined with this divided part is the fourth connector part 17'.
The layer is formed in an insulating case 14'.

In this embodiment, the third layer electric wire 153 is used as a common input line, and two input pressure contact terminals 25A are provided.

25A' are pressed into the fuse insertion holes 17a and 1, respectively.
7b, and the third layer of electric wire 15. is housed in the other side of the insertion hole 17a. The output side press-contact terminal 25B connected to ' is accommodated. On the other hand, the connector portion 17 of the fourth layer insulation case 144'
' accommodates an output side pressure contact terminal 25B' connected to the fourth layer electric wire 154'.

And both cases 143. 144' are overlapped to combine the connector portion 17' with the connector 17, as shown in FIG. 9, two output wires 153, 15. ' can be taken out via the fuse 12, allowing efficient wiring with a reduced number of wires across the upper and lower layers.

FIG. 10 and FIG. 1) respectively show a wiring diagram and a circuit of the main parts according to the lamination method of FIG. 1 in which the fuse connector 17 is not divided.

In this embodiment, the third and fourth layer insulation cases 143.
Since the fuse connectors 17 and 174 in 144 are independent, the third and fourth layer output wires 15. ' and 1
54' from the same power supply, input wire 153
and 154, it is necessary to use two interlayer connection pressure contact terminals 19 and a shortper 23.

As is clear from the comparison between Figures 8 and 10, by adopting a method in which a part of the connector is divided and combined between the upper and lower layers, the number of wires and parts can be reduced.
Enables efficient wiring.

FIG. 12 shows yet another embodiment of the invention.

In the figure, the insulating case 14 is composed of two divided cases 14a and 14b divided in the direction in which the electric wires are arranged.
Each divided case is provided with the necessary fuse connector 17 and/or relay connector 18.

For example, the number of types of insulating cases can be reduced by using the divided case 14a for forming a common circuit regardless of the type of vehicle and the divided case 14b for forming different circuits depending on the type of vehicle. Furthermore, if the divided case 14b is used to form optional circuits that are selected according to the grade of the same vehicle model, it is possible to quickly respond to partial changes in the circuit.

The insulating case is not limited to being divided into two parts, but as shown in FIG.
It may be composed of Each divided case is provided with the necessary fuse connector 17 and/or relay connector 18. As mentioned above, these division cases include a common circuit (14a') that does not depend on the car type, and a car type-specific circuit (14b).
), optional circuits (14c'), etc. can be selectively used.

In this case, as shown in FIG.
If d is prepared, an electrical connection box having a desired circuit configuration can be formed by changing this part.

Insulating case 14 for each layer shown in FIG. ~146, the same maximum number of electric wires 15 are disposed above and below. However, the actual number of sub-harnesses is not necessarily the same, and often differs depending on the vehicle model and grade.

Therefore, as shown in FIGS. 12 to 14, by dividing and forming a part of the plurality of insulating cases that make up the electrical connection box, wasted wiring and space can be eliminated.
It is also possible to quickly respond to changes in vehicle models, grades, and circuits.

〔Effect of the invention〕

As explained above, according to the present invention, the following effects can be obtained.

1) Since the internal circuit of the electrical junction box is formed by an insulating case and electric wires in sub-harness units, the circuit configuration is simplified.

2) Since the connectors for connecting fuses, relays, etc. are arranged centrally on one side of the insulating case, it is easy to connect the connector terminals (insulation terminals 25, 25', 25'') and electric wires.

3) When stacking multiple insulating cases, dead space can be reduced and downsizing can be achieved by stacking them back to back symmetrically or point symmetrically.

4) By adopting a structure in which parts of the connectors provided in the insulating cases of adjacent layers are divided and combined, it is possible to reduce the number of II wires and parts, and improve wiring efficiency.

5) By forming a part of the insulation case by dividing it in the wiring direction, it is possible to perform wiring without waste in accordance with the actual sub-harness, and also to cope with changes or additions to vehicle models, grades, or circuits. It becomes easier.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of a wire-direct connection type electrical junction box showing an embodiment of the present invention, Fig. 2 is a side view of the same electrical junction box as above, and Fig. 3 is the electrical junction box of Fig. 1. 4 is a sectional view taken along the line IV-rV in FIG. 3, and FIG. 5 a-c.
are respectively enlarged perspective views of insulation displacement terminals used in the electrical connection box of FIG. 1, FIGS. 6 and 7 are side views of electrical connection boxes showing other embodiments of the present invention, and FIG. 8 is the invention of the present invention. FIG. 9 is a circuit diagram corresponding to FIG. 8, and FIG. 10 and FIG. A perspective view (Fig. 10) and a circuit diagram (Fig. 1) of the main parts of an electrical junction box for comparison, and Figs. 12 to 14 respectively show still another embodiment of the electrical junction box of the present invention. A perspective view (FIG. 12) and a plan view (FIGS. 13 and 14) of the main parts, FIG. 15 is a perspective view showing a conventional electrical connection box, and FIG. 16 is an exploded perspective view of the main parts. A, B, C... Electrical connection box, 14 (14,,142
~)...Insulation case, 14a, 14b...Divided case, 15 (153, 154~)...Electric wire, 16.
... Connector, 17.17'... Fuse connector, 18-... Relay connector, 19... Pressure contact terminal for interlayer connection, 23.23'... Short bar, 24a.
...Interlayer connection hole, 24...Terminal accommodating part, 25.25'
, 25"...pressure terminal.

Claims (5)

[Claims] (1) A plurality of electric wires constituting a sub-harness are drawn into a plurality of insulating cases each equipped with a fuse connector and/or a relay connector, and arranged in parallel, and the electric wires are placed in a predetermined position in each insulating case. At the same time, a terminal accommodating part having an interlayer connection hole penetrating vertically is provided, a pressure contact terminal for interlayer connection which is to be press-contacted to the electric wire is inserted into the terminal accommodating part, and these insulating cases are stacked, and the interlayer connection of each case is made. The pressure welding terminals for the fuse are connected together using a short bar to perform interlayer connection, and the
or) An electric wire direct connection type electrical connection box characterized in that relay connectors are installed upright on the side opposite to the wire lead-in side of each insulating case, and these connectors are arranged in a concentrated manner in a step-like manner. (2) The electric wire direct connection type electrical connection box according to claim (1), wherein the plurality of insulating cases are stacked back to back in a vertically symmetrical or point symmetrical manner. (3) Claim (1) or (2), wherein a part of the plurality of insulating cases is formed by being divided into two or more parts in the direction in which the electric wires are arranged.
Electrical connection box that connects directly to electric wires. (4) Parts of the fuse connector and/or relay connector of the insulation cases of the vertically adjacent layers are formed so that they can be divided and combined.
3) Any of the electric wire direct connection type electrical connection boxes. (5) A claim in which a connector for connecting an external wire harness is formed on the wire lead-in side of the outermost insulation case, and one end of a short bar for interlayer connection is accommodated and arranged as a connector terminal in the connector. Items (1) to (3)
) any of the electrical connection boxes that are directly connected to electric wires.