JP3339831B2 - Wiring board and electric junction box provided with the wiring board - 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 board for an automobile, an electric connection box provided with the wiring board, and a method of manufacturing the electric connection box.
It is provided with a wiring board composed of an electric wire and a press contact terminal connected to the electric wire.

[0002]

2. Description of the Related Art Conventionally, as a wiring material constituting an internal circuit of an electric junction box such as a junction box for an automobile, a conductive metal plate is generally formed by punching into a circuit shape using a mold. Busbars are used. Instead of the bus bar system, there is also a case where a crimping system is adopted in which an electric wire is laid along an circuit on an insulating plate and a crimping terminal is driven into the electric wire for crimping connection.

[0003]

When a bus bar is used as the internal circuit, a mold must be manufactured according to the circuit, so that there is a problem that the circuit cannot be easily changed and the cost is high. In particular, recently, the number of circuits to be accommodated inside the electric junction box is increasing due to the rapid increase of electric components mounted on automobiles. Therefore, many busbar layers of 7 to 8 layers must be stacked and arranged with an insulating plate interposed. Instead, costs tend to be enormous.

[0004] On the other hand, in the case of the above-mentioned press contact method, the shape of the insulating plate for arranging electric wires is very complicated due to the rapid increase in the number of circuits, and it takes time to process the insulating plate, and The capital investment for that also takes a lot. In addition, recently, there are many types of vehicles and the number of vehicles is small, so that there is a problem in cost.

To solve the above-mentioned problem, Japanese Patent Application Laid-Open No. 60-359 discloses a structure in which an insulating plate supporting an electric wire has a common shape.
In Japanese Patent Publication No. 12, an electrical junction box shown in FIGS. 11A, 11B, and 11C is proposed. In this electric junction box, a unit case 1 assembled by crossing vertical and horizontal frames 1a and 1b is used as an insulating plate.
A horizontal conductor 2 and a vertical conductor 3 are cross-wired on the upper side, and an L-shaped press contact terminal 4 is inserted into and connected to the vertical and horizontal conductors 2 and 3 at a required intersection. A press-contact blade 5a at the tip of the crimp terminal 5 connected to the end of the external electric wire 4 is press-connected to the conductor 2 or 3 for this circuit.

With the above construction, the insulating plate can be shared, but the insulating plate must be provided by assembling the vertical and horizontal frames, and the vertical and horizontal frames must each be provided with a wire guide recess. However, there is a problem that the structure is complicated and large, the insulating plate cannot be made inexpensive, and the electric junction box for accommodating the same becomes large. Further, in order to connect the vertical and horizontal conductors to an external circuit, the terminal 5 connected to the external electric wire terminal is directly pressed into contact with the conductor, so that the external electric wire cannot be connected after the electric connection box is assembled. is there.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to form a circuit very simply and inexpensively while employing a pressure welding method as an internal circuit of an electric junction box.

[0008]

According to the present invention, there is provided a wiring board to be accommodated in an electric junction box, wherein a plurality of vertical and horizontal conductive wires having the same length are provided in parallel. The pitch between the vertical and horizontal conductors corresponds to the terminal hole pitch of the fuse, relay, and connector mounted on the electrical junction box. The intersection of the vertical and horizontal conductors is welded or welded and connected, The wiring material from which unnecessary portions of the conductive wires are cut off is fixed on an insulating plate on a flat plate, and press-contact terminals are driven into required portions of the conductive wires, and the press-connect terminals are connected to tabs at the other ends. A pressure contact terminal for external connection with and a pressure contact terminal for relay provided with pressure contact blades at both ends, and these pressure contact terminals are driven from one or both of the insulating plates and connected to the conductor, There is provided a wiring board characterized in that tabs of the press-connecting terminals for external connection protrude from the terminal holes in the fuse, relay and connector.

The superposed vertical and horizontal conductors are covered with an insulating resin film. That is, it is preferable that the entire surface is covered with an insulating resin film and integrated in a state where the vertical and horizontal conductors are overlapped. When not covered with the insulating resin film, all the intersections of the superposed vertical and horizontal conductors are welded or welded to maintain the cross shape. The above-mentioned vertical and horizontal conductors may or may not be covered, and may be single-core wires or stranded wires.

The press-connecting terminals connected to the above-mentioned conductor by pressure are composed of a press-connecting terminal having a tab at the other end for external connection, and a relay press-connecting terminal having press-connecting blades at both ends. It is driven in from one or both of the plates and is connected to the conductor. That is, the pressure contact terminal press-contacted to the conductive wire may be pressure-connected from the front side of the insulating plate on which the vertical and horizontal wires are wired, or may be pressure-connected from the back side through an insertion hole provided through the insulating plate. Good. Further, the vertical and horizontal conductive wires may be fixed to both the front and back surfaces of the insulating plate, and the crimp terminals may be driven into the crimp connection from both the front and back surfaces.

When the wiring board constituting the internal circuit of the electric junction box is configured as described above, the insulating plate may be a flat plate, and it is not necessary to provide an insulating plate having a complicated shape corresponding to the circuit shape as in the related art. In addition, since the conducting wire to be wired may be straight,
Wiring can be done very easily. Further, in order to obtain a required circuit configuration, it is only necessary to cut off unnecessary conductors, and it is possible to easily form a circuit and easily cope with a circuit change.

The pitch of the conducting wires to be wired in parallel in the vertical and horizontal directions corresponds to the terminal hole pitch of the fuse, relay and connector. For example, part of the horizontal conductor corresponds to the pitch of the fuse, the rest of the horizontal conductor corresponds to the pitch of the relay, part of the vertical conductor corresponds to the small pitch of the terminal holes of the connector, and part of the middle The pitch corresponds to the pitch, and the rest corresponds to the large pitch.

As described above, if the pitch of the conductors wired in parallel in the vertical and horizontal directions is made to correspond to the pitch of the terminal holes of the fuse, relay, and connector connected via the insulation displacement terminal, connection to these conductors is made. The tab provided at the other end of the press contact terminal can be directly connected to a fuse, a relay, or a connector.

Further, the present invention provides an electric junction box containing the above-mentioned wiring board. In this electric junction box, a bus bar for power supply connection is arranged, a plurality of the wiring boards are stacked and arranged, a through hole is provided in the insulating plate, and a press contact plate connected to a conductor of another wiring board is formed in the through hole. Through an external terminal.

In the electric junction box, a plurality of vertical wires and horizontal wires are wired in parallel at a required pitch, and then the vertical wires and horizontal wires are overlapped with each other, and the intersection of the vertical wires and horizontal wires is welded or welded. Welding, then, after fixing the conductive wire on an insulating plate on a flat plate, cutting off the unnecessary portion of the conductive wire, and then driving and fixing a press-contact terminal at a required position of the conductive wire to produce a wiring board, The wiring board is housed and assembled in a case consisting of a lower case and an upper case.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a wiring board 10 according to the present invention. The wiring board 10 has a wiring member 12 fixed to an upper surface of a resin insulating plate 11 made of a rectangular flat plate.
The wiring material 12 is composed of a single-core core wire and a vertical conductor 13 and a horizontal conductor 14, each of which is parallel-wired and overlapped, welded at required intersections and connected, and cut off unnecessary portions of the conductors 13 and 14 to obtain necessary wiring. And the pressure contact terminal 15 is press-connected to the conductors 13 and 14 at required positions.

As shown in FIG. 3, the wiring board 10 is stacked and accommodated in a case of an electric connection box including a lower case 16 and an upper case 17, and a bus bar 18 for power supply is also stacked. Assembling the electrical junction box.

The manufacturing method of the wiring board 10 is shown in FIGS.
First, as shown in FIG. 4, the vertical conductive wires 13 having the same length in a straight line are arranged in parallel at a required pitch in the vertical direction indicated by Y in the drawing. This pitch depends on some vertical conductors 1
During the interval 3, the pitch P1 of the fuse is set, and the remaining vertical conductors 13 are set at the pitch P2 of the relay. On the other hand, horizontal conductive wires 14 having the same length in a straight line are wired at a required pitch in the horizontal direction indicated by X in the figure. This pitch is adjusted to the small pitch P3 of the connector terminal holes between some of the horizontal conductors, the other pitch is adjusted to the medium pitch P4 of the connector terminal holes, and the rest is adjusted to the large pitch P5 of the connector terminal holes. .

In practice, the vertical conductors 13 are superposed at the required pitch on the upper surface of the horizontal conductors 14 arranged in parallel at the required pitch to form a grid, and the superimposed shape corresponds to the upper surface of the insulating plate 11. Shape. Then, FIG.
As shown in the figure, the overlapped vertical and horizontal conductors 13 and 14 are welded or welded at intersections that need to be connected in forming a circuit and intersections that are necessary to maintain a grid shape, thereby forming an electrical connection portion 20. are doing. Note that all the intersections of the vertical and horizontal conductors 13 and 14 may be joined by welding or welding.

As shown in FIG. 6, the vertical and horizontal conductors 13 and 14 formed in a lattice shape by joining the intersections are fixed to the upper surface of the insulating plate 11. The insulating plate 11 has a side wall 11a erected on the outer periphery thereof, and the vertical and horizontal conductors 13 and 14 are mounted on a concave upper surface 11b surrounded by the side wall 11a.
Are press-fitted and fixed between holding ribs 11c protruding from the upper surface 11b. A lattice-like guide groove for inserting and holding the vertical and horizontal conductors 13 and 14 may be provided on the upper surface 11b of the insulating plate 11, and the vertical and horizontal conductors may be inserted and positioned in the guide groove.

The insulating plate 11 has a driving groove 11e for a press contact terminal to be driven from above, a driving hole 11f for a press contact terminal to be driven from below, and a press contact terminal of another layer from below or above to penetrate. 11g is formed at a required position. The driving groove 11e, the driving hole 11f
Are formed at positions intersecting with the vertical conductors 13 or the horizontal conductors 14.

As described above, the vertical and horizontal wires 1 are placed on the insulating plate 11.
After the wiring members 3 and 14 are fixed, as shown in FIG. 7, the portions Z of the vertical and horizontal conductors 13 and 14 which are unnecessary in the circuit are cut and cut off. Thereby, the vertical and horizontal conductors 13 and 14
More required circuits can be formed. When all the intersections of the vertical and horizontal conductors 13 and 14 are joined by welding or the like,
Unnecessary portions may be cut before placing on the insulating plate 11.

Next, as shown in FIG. 8, the press contact terminal 15 is driven into a required position and connected to the vertical conductor 13 and the horizontal conductor 14 by pressure. The press contact terminal 15 is a vertical flat plate having a press contact blade 15a at one end and a tab 15 serving as a male terminal at the other end.
b. When the press contact terminal 15 is driven from above the conductor wire side, the press contact terminal 15 is press-fitted into the driving groove 11e, and the press contact terminal 15 which is press-connected to the conductor wire is projected upward. Also,
When the crimping terminal 15 is driven from below, the crimping terminal 15 which is driven into the driving hole 11f to be crimped and connected to the conductor is projected downward. One of the relay pressure contact terminals 21 provided with pressure contact blades 21a and 21b at both ends is driven into the driving groove 11e or the driving hole 11f.

A required number of wiring boards 10 (two 10A and 10B in this embodiment) manufactured by the above method are manufactured, and as shown in FIG.
OB and the upper and lower layers. These wiring boards 10
In A and 10B, a conductor is laid on the insulating plate 11 and only the insulating plate is provided on the lower surface side. During this lamination, the press-contact terminals 15 of the lower wiring board 10A protrude upward through the through holes 11g of the upper wiring board 10B, and the relay press-contact terminals 21 pass through the driving holes 11f of the upper wiring board 10B. The conductor is press-connected to the conductor, and the conductors of the wiring boards 10A and 10B are connected intermediately. Further, the press contact terminal 15 of the upper wiring board 10B is projected downward through the through hole 11g of the lower wiring board 10A, and is projected to the terminal hole of the connector accommodating portion provided in the lower case 16.

A power supply bus bar 18 is stacked above the upper wiring board 10B with an insulating space.
The bus bar 18 has a tab 18a connected to an external terminal (not shown) connected to the power supply side, which is bent upward, and a pressing plate portion 18c formed with a pressing blade 18b at its tip is bent downward. , And is press-connected to the conductive wire of the wiring board 10B. Thus, the wiring board 1 is placed on the lower case 16.
After laminating the 0A, 10B and the bus bar 18, the upper case 17 is covered, and the press contact terminals 15 protruding upward are respectively protruded into the terminal holes of the connector, relay, and fuse accommodating portion provided in the upper case 17. . In this state, the upper case 17 is locked and fixed to the lower case 16, and the assembly of the electric connection box is completed.

FIGS. 9 and 10 (A) and 10 (B) show a second embodiment, in which the vertical and horizontal conductors 13 and 14 are overlapped in a lattice shape, and the intersections are joined by welding or the like. As shown in the figure, the insulating resin film 30 covers both sides. Then, unnecessary portions on the circuit are cut and cut off from the covering of the insulating resin film 30.

As described above, since it is covered with the insulating resin film 30 and held in a thin rectangular shape, the insulating plate 11
Unnecessary portions can be cut off before being fixed on the upper side, and a required circuit can be formed from the vertical and horizontal conductors 13 and 14. After that, as shown in FIG.
The wiring board 10 is manufactured by mounting and fixing on the substrate 1 and making a pressure contact connection with the pressure contact terminal 15 as shown in FIG. At the time of connection of the press contact terminal 15, since the covered resin film 30 is broken and connected to the conductor by pressure, there is no problem even if the insulating film 30 is covered.

In the above-described embodiment, the wiring members composed of the vertical and horizontal conductors 13 and 14 are attached only to the upper surface side of the insulating plate. However, the wiring members composed of the vertical and horizontal conductor lines are attached to the lower surface side of the insulating plate or both upper and lower surfaces. You may. Further, in the above embodiment, only the power supply connection circuit is formed by the bus bar, but a circuit that does not change in any vehicle may be formed by the bus bar. Further, the conductor constituting the wiring member is not limited to a single core wire, and may be a conductor having an insulating coating layer, and may be a stranded wire instead of a single core wire.

[0029]

As is apparent from the above description, according to the present invention, the insulation circuit for supporting the electric wire in the electric circuit using the electric wire and the press contact terminal for press-connecting the electric wire as the internal circuit of the electric connection box. The plate can be formed in a flat plate shape without being caught by the circuit. Therefore, there is no need to provide an insulating plate with a complicated shape required in the case of the conventional pressure welding method,
Cost can be reduced. In addition, since the electric wire to be wired on the insulating plate may be a straight wire having a certain length and parallel wiring at a required pitch, the wiring work of the electric wire is facilitated, and the processing speed can be increased, and the processing is complicated and effective. There is no need to provide equipment.

Further, while the required intersections of the vertical and horizontal conductors are joined by welding, welding or the like to be electrically connected, a circuit of a required shape can be easily formed only by cutting off unnecessary portions. This method has various advantages such as easy operation without cost.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIGS. 2A and 2B are enlarged cross-sectional views of a main part of FIG.

FIG. 3 is an exploded perspective view of the electric junction box of the present invention.

FIG. 4 is a schematic view illustrating a manufacturing method of the present invention.

FIG. 5 is a schematic view illustrating a manufacturing method of the present invention.

FIG. 6 is a perspective view illustrating a manufacturing method of the present invention.

FIG. 7 is a perspective view illustrating a manufacturing method of the present invention.

FIG. 8 is an exploded perspective view showing a manufacturing method of the present invention.

FIG. 9 is a second embodiment of the present invention, in which (A) is an exploded perspective view showing a manufacturing method, and (B) is a cross-sectional view.

FIGS. 10A and 10B are enlarged cross-sectional views of a main part of a wiring board according to a second embodiment.

FIGS. 11A, 11B and 11C are views showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Wiring board 11 Insulating board 12 Wiring material 13 Vertical conducting wire 14 Horizontal conducting wire 15 Pressure contact terminal 16 Lower case 17 Upper case 18 Bus bar 20 Electrical connection part 21 Relay pressure contact terminal 30 Insulating resin film

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kazuhiro Aoki 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (56) References JP-A-9-29445 (JP, A) JP-A-10-257641 (JP, A) JP-A-9-168220 (JP, A) JP-A-8-227736 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02G 3/16 B60R 16 / 02 H01R 4/58 H05K 7/06

Claims (4)

(57) [Claims] 1. A wiring board accommodated in an electric junction box, wherein a plurality of vertical and horizontal conductive wires having the same length are provided in parallel.
The pitch between these vertical and horizontal conductors is
Fuses, relays and connector terminals to be mounted on the air junction box
According to the hole pitch, the intersections of the vertical and horizontal conductors are connected by welding or welding.
Wiring with unnecessary conductors cut off on the circuit.
The wire is fixed on an insulating plate on a flat plate, and
The crimping terminal is driven into the required portion of
The terminal is a press-fit terminal with a tab at the other end for external connection and
And crimping terminals for relays with crimping blades at both ends.
These crimp terminals are stamped from one or both of the insulation plates.
And connected to the conductor,
The tab of the insulation displacement terminal for connection is connected to the fuse, relay,
A wiring board protruding from the terminal hole in the terminal . 2. The wiring board according to claim 1, wherein the superposed vertical and horizontal conductors are covered with an insulating resin film. 3. The wiring board according to claim 1 or claim 2.
Electrical junction box housing. 4. A bus bar for connecting a power supply together with the wiring board.
The electric junction box according to claim 3, wherein the electric connection box is arranged in a stacked manner .