JPS5812516Y2 - Wire-harness interconnection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an interconnection device mainly used for electrical wiring of a wire harness (wire assembly for automobiles).

The number of electrical components installed in automobiles has been increasing in recent years in order to improve their safety and comfort.

In order to reduce the manufacturing cost of wire harnesses by simplifying the rapidly increasing number of circuits and complicated wiring configurations, we incorporated many electrical circuit units such as fuses and relays, and created terminal groups for external circuits. An interconnection device (hereinafter referred to as power distribution plane) with a group of connectors that encompasses

) has been proposed. However, if we take the wiring board housed in a conventional power distribution box as an example, there is a so-called power circuit that connects the power supply and the load, and a 0NO circuit for this power circuit.
The so-called signal circuits that control the FF are formed on the same wiring board, and the connection terminal groups for these circuits are grouped in different locations, so the circuit configuration of the wiring board is complex, making it difficult to install it in a car. However, if the load specifications or mounting position change, the circuit cannot be used because its internal configuration is fixed.

The present invention has been made focusing on the above-mentioned points.

In other words, the first purpose of the present invention is to separate the connection parts with external circuits taken out from the circuit of the wiring board into those for power circuits and those for signal circuits, so that the circuit configuration of the wiring board itself is simple and easy to manufacture. To provide power distribution boxes.

The second purpose of the present invention is to provide an external connector for the power circuit on one side of the power distribution box and an external connector for the signal circuit on the other side.
To provide a power distribution box that allows easy routing of wire harnesses.

A third object of the present invention is to connect the connection part taken out from the circuit of the wiring board and the internal terminal fitting of the external power circuit connector via electric wires, so that the internal configuration of the circuit can be changed arbitrarily. The purpose is to provide a power distribution box that can be changed to

The present invention will be explained below with reference to the drawings.
In the figure, 1 is a case of a power distribution box, which is composed of a main body 1a and a lid 1b.The main body 1a has an opening at the top and front, and a lid 1b having an angular cross section is fitted facing the opening. It is the composition.

The main body 1a has two external connectors 2 and 2' for signal circuits on the rear wall, a plurality of power circuit connectors 3 and a fuse case 4 on the bottom wall, and wiring on the inner surfaces of the left and right side walls. Slide grooves 5, 5' for the plate are recessed.

The signal circuit external connectors 2, 2' have a structure that protrudes from the inside and outside of the main body 1a, and the slide grooves 5, 2' are provided inside the main body 1a.
An insertion groove 2a for the wiring board is recessed at the same level as 5',
A plurality of support holes 2b for terminal fittings 7 connected to wires 6 are arranged in parallel at predetermined intervals on the outside, and terminal fittings 8 for interlayer post-corrosion are installed between the upper and lower connectors 2, 2'.

Each of the terminal fittings 7°8 is an elastic connecting piece 7 curved inward.
a and 8a, and are arranged vertically facing each other facing the insertion groove 2a.

The power circuit external connector 3 is provided with a plurality of round pin terminals 9.

That is, the center portion of the round pin terminal 9 is integrally molded and fixed to the bottom wall of the main body 1a, and one end is provided to protrude into the main body 1a, and the other end is provided to protrude into the connector 3.

A wire harness connector 10 is fitted onto the external connector 3 and is connected to an external wire 12 via a female terminal fitting 11.

On the other hand, the fuse case is provided with a support hole 4a for the fuse connection terminal 13.

As shown in FIG. 3, the fuse connection terminal 13 has a round bottle terminal portion 13a on one side and a female electrical contact portion 13b on the other side, and is made of a single metal plate by pressing, bending, etc. to form.

That is, the round pin terminal portion 13a is formed into a cylindrical shape by bending both sides of the substrate portion 13C in the same manner, and the female electrical contact portion 13b is formed by bending the other both sides of the substrate portion 13C into a cross-sectional shape. A frame piece 13d is formed, and a pair of elastic tongue pieces 1 are formed by folding the end extending portions of the frame piece 13d inwardly at the top and bottom of the frame piece 13d.
3 e and 13 e, and the piece 13 e
, 136, and the male tab terminal 14a of the blade type fuse 14 is inserted between the two.

15 is a first wiring board, and 15' is a second wiring board, which are fitted into the insertion grooves 2a of the signal circuit external connectors 2, 2' through the slide grooves 5, 5', respectively.

In this case, the first wiring board 15 is configured as a signal circuit wiring board, and a portion of the copper foil circuit 16 and 17 disposed on the lower peripheral surface of the insulating substrate 15a extends to one side of the insulating substrate 15a. The wires 6,
It is connected to the second wiring board 15'.

A desired electrical circuit unit 18 consisting of a plurality of capacitors 18a, a resistor 18b, etc. and a plurality of relays 19 are mounted on the first wiring board 15, and are combined with and connected to the copper foil circuits 16 and 17 to achieve a desired electrical circuit. Form a signal circuit.

As shown in FIG. 4, the loop 19 has a plurality of circuit contact pieces 21 folded back on both the front and rear sides of a case 20 having a cubic shape, and a power supply connection terminal 22 protruding downward. , loose fitting prevention protrusion 2 on the left side of the case 20
0 has a protruding configuration.

Further, a relay fitting hole 15b is formed in the first wiring board 15, and the tip extension portion of the copper foil circuit 16 extending toward the hole 15b is folded back along the edge of the hole, and the circuit contact piece is A plurality of connecting portions 16a corresponding to 21 are formed.

On the other hand, the second wiring board 15' is configured as a wiring board that serves both the signal circuit and the power circuit in this case.
Parts of the circuits 16' and 17' disposed on the upper and lower surfaces of a' are extended to one side thereof, and are connected to the terminal fittings 8 and 7, respectively.
It is connected to the first wiring board 15 and the wire 6 via.

This second wiring board 15' is provided with a plurality of connector fitting holes 15b' and 15C' for a plurality of signal circuit internal connectors 23 and a plurality of power circuit internal connectors 24 and 24'.

As shown in FIG. 5, the signal circuit internal connector 23 is formed by integrally molding a plurality of U-shaped terminals 25 with a housing 26, and the base ends 25a of the terminals 25 penetrate through the insulating substrate 15a' to the bottom surface. The other end 25b is formed as a male tab terminal, and the connector is fitted facing the group of male tab terminals 25b: JL15b'
has been established.

Further, the power circuit internal connector 24 is connected to the signal circuit internal connector 23, and is connected to the housing 27.
A female terminal fitting 28 is attached to the male tab terminal 25b, and the outer wall of the housing 27 is provided with a locking arm 27a that engages with the connector fitting hole 15b'.

On the other hand, the power circuit internal connector 24' is also connected to the connector 24.
However, the female terminal fitting 28 is directly connected to the power supply connection terminal 22 of the relay 19.

29 is internal wiring, power internal connector 24.2
4' and the power external connector 3 or the fuse case 4, a female terminal fitting 28 is fixed to one end, and a female terminal fitting 11 for the round pin terminal 9 or the round pin terminal part 13a is fixed to the other end. By changing the connection points, the internal configuration of the power circuit can be changed arbitrarily.

FIG. 6 shows another example of an external connector for power circuits, in which an external connector 3' is provided with a support hole 3a' for a round pin terminal,
A round pin terminal part 11a' and a wire connection part 11b are inserted into the hole 3a'.
A terminal fitting 11' that is integrated with the terminal fitting 11' can be inserted into the terminal fitting 11'.

In this case, unlike the round pin terminal 9, there is no need to integrally mold the terminal with the bottom wall of the main body 1a, which simplifies manufacturing and also facilitates replacement in the event of deformation or damage.

FIG. 7 shows another example of the fuse case 4, in which a box-type fuse 14' can be used in place of the blade-type fuse 14.

That is, the box-shaped fuse 14' has a fusible conductor 14.a'
A pair of plate-shaped conductors 14b' connected by the above are housed in a case 140' made of synthetic resin, and the end surfaces of the plate-shaped conductors 14b' are exposed from both sides of the case 14C'.

In this case, instead of the fuse connecting terminal 13, fuse connecting terminals 13', 13' having a curved contact piece 13b' formed at one end of the round pin terminal portion 13a' are used.

In the above configuration, in order to assemble the power distribution box, first.
Insert the second wiring boards 15 and 15' into the slide grooves 5 and 5', and connect the ends of the second wiring boards 15 and 15' to the signal circuit external connectors 2 and 15', respectively.
After fitting into the insertion grooves 2a and 2a' of 2', the first wiring board 15
Each relay 19 is press-fitted into the relay fitting hole 15b.

Next, each power circuit internal connector 24 is fitted and connected to the signal circuit connector 23 of the second wiring board 15' through the connector fitting hole 15b', and the power circuit internal connector 24 is fitted into the fitting hole 15C'. ' and connect relay 19.
Connect to the power supply connection terminal 22 of.

At this time, both internal connectors 24, 24' are securely locked by respective locking arms 27a.

Next, the other end of the internal wiring 29 connected to each internal connector 24, 24' is connected to the round pin terminal 9 or round pin terminal portion 13a of the power circuit external connector 3 or the fuse case 4 via the female terminal fitting 11. After the connections are made, the lid 1b is attached to the main body 1a.

With the above, the electrical connections within the power distribution plane are completed, so the terminal fittings 7 and wire harness connectors connected to the wires 6 are sequentially connected to the signal circuit external connectors 2 and 2' and the power circuit connector 3, respectively. At the same time, a blade fuse 14 is connected to the fuse case 4.
Once inserted, the wiring harness interconnection using the power distribution box is completed.

That is, the wire harness for the signal circuit is connected by the external connectors 2 and 2', and the wire harness for the power circuit is connected by the external connector 3 in a neatly partitioned state.

As described above, according to the present invention, the wire harness is wired in a manner that is neatly divided into signal circuits and power circuits, so it is possible to avoid the complicated configurations that are complicated with each other as in the past, and to simplify the wiring. It has the advantage that it can be simplified and that searching in the event of a wire breakage is extremely easy.

In addition, the connection parts with external circuits taken out from the wiring board are separated into those for signal circuits (i.e., connection parts 16a of copper foil circuit 16, etc.) and those for power circuits (i.e., power supply connection terminals 22, etc.). It is possible to avoid these being concentrated in one place, as in
The circuit configuration of the wiring board itself becomes easy.

Further, the power circuit connection portion of the wiring board is configured to be connected to the internal terminal fittings (namely, female terminal fittings 11 and terminal fittings 11') of the external connector for power two circuits via electric wires.

Therefore, by replacing the connection points, the circuit configuration of the wiring board itself can be easily reconfigured, making it possible to change the design of the wiring board by changing the specifications of the load mounted on the vehicle or the mounting position, as in the past. You can eliminate waste.

As described above, the present invention provides an external connector for the signal circuit connected to the wire harness on one side wall of the case body, an external connector for the power circuit connected to the wire harness on the other side wall, and the signal circuit inside the case body. Attach a wiring board with a connecting part □ corresponding to the internal terminal fitting of the external connector for the power circuit, and connect the power circuit connecting part provided on the wiring board to the internal terminal fitting of the external connector for the power circuit via an electric wire. Because of this structure, the intended purpose can be distantly related.

[Brief explanation of the drawing]

The drawings show an embodiment of the invention; FIG. 1 is a perspective view of the interconnection device in its separated state, FIG. 2 is an explanatory diagram of its assembled state, and FIG. 4 is a perspective view showing the mutual relationship between the first wiring board 15 and the blade ray 19, and FIG. 5 is a perspective view of the second wiring board 1.
6 and 7 are explanatory views showing other embodiments of the power circuit external connector and the fuse, respectively. 1...Case, 1a...Body, 1b.
... Lid body, 2゜2' ... External connector for signal circuit, 3 ... External connector for power circuit,
7, 8, 9.11...Terminal fitting, 15°15'
...Wiring board, 29...Electric wire.

Claims (1)

[Scope of utility model registration request] An external connector for a signal circuit connected to the wire harness is provided on one side wall of the case body, an external connector for a power circuit connected to the wire harness is provided on the other side wall, and
A wiring board having a connecting part corresponding to the internal terminal fitting of the external connector for the signal circuit is mounted inside the case body, and the connecting part for the power circuit provided on the wiring board is connected to the external connector for the power circuit via an electric wire. An interconnection device for a wire harness, characterized in that it is connected to an internal terminal fitting.