JP3344344B2 - 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 an electric connection box, and more particularly, to a junction box or the like incorporated in a wire harness for an automobile, as an internal circuit.
In the case where the upper case and the lower case are provided with internal circuits each composed of a combination of an electric wire and a press-contact terminal, the connection form of these electric wires is improved.

[0002]

2. Description of the Related Art Conventionally, in an electric connection box such as a junction box for housing branch circuits at a high density, a circuit combining an electric wire and a press contact terminal may be used alone or in combination with a bus bar. Particularly, when circuits are housed at high density, electric wires are routed along the inner surfaces of the lower case side and the upper case side, and bus bars are arranged with an insulating plate interposed therebetween. That is, electric wires,
The circuit is housed in an electrical junction box with a vertically stacked structure of bus bars and electric wires.

In the case of manufacturing the electric junction box having the above structure, as shown in FIG. 8, the lower case 1 and the upper case 2 are arranged in a state where the lower case 1 and the upper case 2 are developed on the same plane with a predetermined gap C therebetween. The inside faces upward. The connectors 3 and 4 are fixed at required positions on the inner surfaces of the lower case 1 and the upper case 2 facing upward with jigs and the like, and the press contact terminals 5 and 5 are provided in the terminal receiving holes of the connectors 3 and 4. The slot is installed facing upward. A single electric wire (single core wire) w is drawn along the inner surfaces of the juxtaposed lower case 1 and upper case 2 from the lower case 1 side to the upper case 2 side by one stroke, and conversely, from the upper case 2 side to the lower case 1 side. To the lower case 1 and the upper case 2 while straddling the gap C, and directly drive the electric wire w into the press contact terminals 5 and 5 attached to the connectors 3 and 4 of the lower case 1 and the upper case 2. , Electric wire w
And the press contact terminals 5 and 5 are connected.

[0004] As described above, the reason why the electric wire w is continuously connected to the lower case 1 side and the upper case 2 side by one stroke is that the electric wire w must be connected.

After the electric wires w are laid on the inner surfaces of the lower case 1 and the upper case 2 as described above and press-connected to the press contact terminals 5 and 5, the electric wires w on the lower case 1 side and the electric wires w on the upper case 2 side are connected. The upper case 2 is rotated to overlap the lower case 1 toward the lower case 1 as shown by an arrow so that the upper case 2 faces the lower case 1 so as to be overlapped with each other.

As shown in FIG. 9, on the lower case 1 side, an insulating plate 6 is disposed above a circuit composed of the electric wire w and the press contact terminal 5, and a bus bar 7 is disposed thereon. After the insulating plate 8 is further disposed on the upper surface of the lower case 1, the lower case 1 and the upper case 2 may be fitted together so that the electric wires w on the upper case 2 side are disposed.

[0007]

As described above, the electric wire w is laid in a state where the lower case 1 and the upper case 2 are spread on the same surface, so that the lower case 1 and the upper case 2 are arranged.
Has to be laid over the gap C between them. In this state, when the lower case 1 and the upper case 2 are to be fitted together, the electric wire portion wa straddling the gap between the lower case 1 and the upper case 2 becomes U-shaped like a hinge as shown in FIG. It is necessary to be folded back, and there is a problem that this folded wire portion wa jumps out.

Further, when the bus bar 7 is interposed, if a tab 7a protruding from the bus bar 7 is present at a position close to the folded side of the upper case 2, when the lower case 1 and the upper case 2 are fitted, the upper case 2 2, there is a problem that the tab 7a of the bus bar 7 cannot be properly inserted into a required terminal hole on the upper case 2 side.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and prevents an electric wire from protruding from one outer surface of a fitting portion between a lower case and an upper case, and rotates the upper case to fit the lower case into the lower case. It is a first object of the present invention to solve the problem that the tab cannot be inserted into the terminal hole of the upper case. Further, it is a second object of the present invention to be able to connect the wires laid to the lower case and the upper case in various patterns.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a press contact terminal which is laid along inner surfaces of a lower case and an upper case, respectively, and which is driven into a connector attached to the lower case and the upper case. The electric wires to be connected by pressure connection are connected by press contact blades provided on the upper and lower sides of a connection bus bar arranged on the side surface of the lower case and the upper case, and the connection bus bar is divided into a plurality of pieces, each of which is divided. The connection bus bar provides an electric connection box in which at least one required number of lower case side electric wires and at least one upper case side electric wire are connected.

As described above, when the wires laid on the lower case side and the upper case side are connected by the connection bus bar arranged on the side of the case, it is not necessary to connect the wires on the lower case side and the upper case side. In addition, since the required wires on the lower case side and the upper case side are connected to each other by the connection bus bar, the connection according to the circuit design can be easily performed, and the design can be easily changed.

The electric wires laid on the inner surfaces of the lower case and the upper case were cut by a single stroke in a state where the lower case and the upper case were arranged in parallel in an expanded shape, and then cut at a position between the lower case and the upper case. Or an electric wire separately laid on the lower case side and the upper case side.

When the electric wires are laid with a single stroke while the lower case and the upper case are deployed, the electric wires are easily laid, but the electric wires are cut between the lower case and the upper case. Since the wires serving as hinges between the lower case and the upper case can be prevented from protruding outward, and it is not necessary to rotate the upper case to cover the lower case, the terminals accommodated in the case are connected to the terminal holes of the upper case. The disadvantage that it becomes difficult to insert into the device can be prevented. On the other hand, when the lower case and the upper case are separately wired, the wiring can be performed more easily.

As described above, the connection bus bar is divided into a plurality of pieces, and each of the divided connection bus bars connects one or more required number of the lower case side electric wire and the upper case side electric wire.

That is, one electric wire on the lower case side and one electric wire on the upper case side may be connected by a connecting bus bar (in this case, a so-called short pin form). That is, as described above, when the lower case side and the upper case side are unrolled and wired with a single stroke and then cut, when the cut electric wires are connected one by one so as to correspond to each other, the same circuit as the single stroke before the cut is obtained. It can be.
If the two wires on the upper case side and the one wire on the lower case side are connected by a connection bus bar without using the same circuit as before cutting, the two wires on the upper case side are spliced (joint). It can be in the state of having done.
Similarly, if two or more electric wires on each of the upper case side and the lower case side are connected by one connection bus bar, many circuits can be jointed. As described above, by connecting the wires on the lower case side and the upper case side with the divided connection bus bars arranged on the side of the case, the circuit configuration can be easily changed, and the usability is improved.

The cut portion of the wire is bent upward on the lower case side, bent downward on the upper case side, and the connection bus bar has upper and lower horizontal portions bent from both ends of the vertical portion. The press-contact slots cut out from the tips of the upper and lower horizontal portions are press-connected to the vertically bent wires from the side.

With the above configuration, the press-connecting operation between the upper and lower electric wires and the side connection bus bars can be easily performed. However, the upper and lower sides of the connection busbar are not bent,
A vertical plate may be formed by cutting out slots provided with upper and lower press-connecting blades and inserting the wires into the slots while keeping the wires in the horizontal direction to press-connect the wires and the connection bus bars.

The connection bus bars attached to the side surfaces of the lower case and the upper case are covered with an insulating resin cover. By covering the cover made of an insulating resin in this way, it is possible to protect and insulate the connection bus bar disposed on the outer surface of the case.

A bus bar is disposed between the circuits formed by the combination of the electric wires and the pressure contact terminals on the lower case side and the upper case side with an insulating plate interposed therebetween, and the circuit composed of the electric wires and the pressure contact terminals is used in combination with the bus bar circuit. are doing. In addition,
Needless to say, the bus bars may be further stacked and arranged via an insulating slope, and a branch circuit can be provided with high density inside the electric connection box.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

First, the method of manufacturing the electric junction box will be described. As shown in FIG. 1, the lower case 11 and the upper case 12 are arranged in the unfolded state on the same plane with a gap C as shown in FIG. The press contact terminals 5 are driven into the connectors 13 and 14 on the upper surfaces of the lower case 11 and the upper case 12 facing upward, and the electric wire (single-core wire) w is drawn by a single stroke across the gap C between the lower case 11 and the upper case 12 arranged side by side. Are connected, and the electric wire w is directly driven into the press contact terminal 5 for press contact connection.

Next, as shown in FIG. 2, the electric wire wa, which has been conventionally wired over the gap C and has been hinged when the upper case is folded back to the lower case, is cut at the center thereof as shown in FIG. 2. I do. Therefore, the electric wire w drawn in one stroke is separated into the electric wire w-2 on the upper case 12 side and the electric wire w-1 on the lower case 11 side. On the side opposite to the cutting side, the electric wires w-1 and w-2 remain in a continuous state as shown in FIGS.

In this embodiment, as shown in FIG. 3, similarly to FIG. 9, the insulating plate 16, the bus bar 17, and the insulating member 16 are provided between the electric wire w-1 of the lower case 11 and the electric wire w-2 of the upper case 12. The plate 18 is interposed. The bus bar 17 is provided with a bent tab 17a to be inserted into a terminal hole of the lower case 11 and / or the upper case 12, and a protruding blade portion 17b that presses the upper and lower electric wires w-2 and w-1. A press contact projection 17c is also provided.

As described above, by cutting the electric wire w laid across the lower case 11 and the upper case 21, it is not necessary to rotate the upper case 12 toward the lower case 11 and fold it over. The problem on the rotation locus of the upper case, which has conventionally occurred when fitting 11 into the upper case 12, can be solved, and the tab 17a of the bus bar 17 can be accurately and smoothly inserted into the terminal hole of the upper case 12. Become.

However, it is necessary to connect the electric wire w-1 on the lower case 11 side and the electric wire w-2 on the upper case 12 side which have been continuously connected.

For this reason, the electric wire w-1 on the lower case 11 side
3 and 4, the bent portion is bent upward while bending the cut portion w-2a of the electric wire W-2 on the upper case 12 side. w-1b and W-2b are provided.

The upper and lower bent portions w-1b and w-2b, which are bent so as to face each other, are press-connected by a plurality of connection bus bars 10 (also referred to as short pins) arranged sideways. The connection bus bar 10 has a vertical portion 10a.
The upper and lower horizontal portions 10c and 10d are provided at both ends thereof with slots 10e and 10f provided with press-contact blades on the inner peripheral surface from the tips of the upper and lower horizontal portions 10c and 10d.

A slot 10e of the upper horizontal portion 10c has a bent portion w- on the upper case 12 side bent downward.
2b is inserted and press-connected by the press blade. Similarly,
A refracting portion w-1b on the lower case 11 side which is refracted upward is inserted into the slot 10f of the lower horizontal portion 10d and is press-connected by a press-contact blade. As described above, the cut wires are connected via the connection bus bar 10 by press-connecting the cut wires at the upper and lower horizontal slots.

In the present embodiment, as the connection bus bar 10, as shown, the first connection bus bars 10-1 to 10-1 are connected.
Eleven eleventh connection bus bars 10-11 are provided.

The first connection bus bars 10-1 to 11
The connection bus bar 10-11 has various forms, and is a bus bar 10- that connects one bending portion w-2b on the upper case 12 side and one bending portion w-1b on the lower case 11 side.
2, 10-5, 10-6, 10-7, 10-8, 10-
9, 10-11, and two upper case-side bending portions w-
A bus bar 10-1 for connecting the two bent portions w-2b and w-1b on the Abber case side and the lower case side, and a bus bar 10-3 for connecting the two bent portions w-2b and w-1b on the lower case side. , 10-4, and 10-10, and the interval between the vertical portions is set as a required interval.

As described above, by connecting the lower case side electric wire w-1 and the upper case side electric wire w-2 cut through the connecting bus bar 10, and changing the form of the connecting bus bar, various circuit configurations can be obtained. I am able to respond. That is, a joint function can be provided by connecting a plurality of cut electric wires with one connection bus bar.

The electric connection box is provided with an insulating plate 16, a bus bar 17, and an insulating plate 18 on the electric wire w-1 on the inner surface of the lower case 11.
Are stacked, and the upper case 12 on which the electric wire w-2 is wired is put thereon, and assembled. FIG. 2 is a side view of the peripheral wall of the lower case 11 and the upper case 12 on the side where the electric wire is cut.
As shown in FIG. 5, grooves 11a and 12a from which the wire cut portions w-1a and w-2a are drawn out one by one are provided in parallel. The lower case 11 and the upper case 12
A large opening may be provided on the side surface of each of them, and a guide member provided with a groove for drawing out electric wires one by one may be fitted and fixed to the opening.

Further, wire guide grooves 16a and 18a are formed on corresponding side surfaces of the insulating plates 16 and 18 interposed between the lower case 11 and the upper case 12, respectively.

An electric wire cutting portion w-1a is drawn out from the groove 11a of the lower case 11, and an electric wire cutting portion w-2a is drawn out from the groove 12a of the upper case 12, respectively.
b, w-2b are connected to the wire guide grooves 16 of the insulating plates 16, 18.
a and 18a to hold the position.

In this state, the bending portions w of the electric wires w-1 and w-2 are connected to the connection bus bars 10-1 to 10-11 from the outside.
The lower horizontal portion 10d and the slots 10f and 10e of the upper horizontal portion 10c are pressed into -1b and w-2b for pressure contact connection. In addition, the press-contact blade 17b provided on the bus bar 17 also has the electric wire w.
-1 and w-2.

As described above, after the connection bus bar and the wire connection portion are press-connected, the cover 15 made of insulating resin is
To protect and insulate the connection bus bar 10. The cover 15 locks lock frames 15 a provided on both upper and lower surfaces thereof with lock claws (not shown) of the lower case 11 and the upper case 12. The electric connection box 50 assembled in this manner is in the state shown in FIG.

In the electric connection box 50 having the above-described structure, unlike the conventional case, the electric wires do not protrude outward from the sides of the electric connection box, and the cut wires of the lower case 11 and the upper case 12 are not connected to the side. Busbar 10 for connection
Connected by At the time of this connection, the electric wire w-1 on the lower case 11 side and the electric wire w-2 on the upper case 12 side can be connected by the form of the connection bus bar 10, and
A joint can also be used, so that it is possible to easily cope with a change in the circuit design.

The present invention is not limited to the above embodiment.
As shown in the figure, the present invention can also be applied to a case where the wires w-1 and w-2 are separately laid separately on the lower case 11 and the upper case 12 side, and the lower case-side wire w-1 and the upper case-side wire w- 2 can be formed in various connection forms by the side connection bus bar 10.

Further, the shape of the connection bus bar 10 is not limited to the above-described embodiment. As shown in the connection bus bar 10 'of FIG. The upper and lower ends of 10a 'may be provided with press-contact slots 10e' and 10f 'which are open vertically. In this case, the lower case-side electric wire w-1 and the upper case-side electric wire w-2 are not bent, but are extended in the horizontal state of the wiring state, and are inserted into the press-contact slots 10e 'and 10f' to perform press-connect. You can do it.

Further, when wires are laid not only on the lower case and the upper case but also on the insulating plate interposed therebetween, the electric wires are press-connected to press-connecting blades provided at intermediate portions of the connection bus bars arranged on the side. Alternatively, the electric wires arranged in a plurality of layers can be press-connected by the side connection bus bars.

[0041]

As is clear from the above description, according to the present invention, since the electric wires laid along the inner surfaces of the lower case and the upper case are connected by the bus bars for connecting the side surfaces, the lower case side and the upper case are connected. The case side can be separately wired, and the wiring work of the electric wire can be facilitated. Further, when the lower case and the upper case are arranged in a developed shape and wired with a single stroke as in the related art, the electric wire can be cut between the lower case and the upper case. Therefore, the electric wire at the hinged side, which has been generated when the cable is laid with a single stroke, protrudes from the case, and the tab accommodated inside the case is the terminal hole on the upper case side along the rotation locus of the upper case. The problem that it becomes difficult to insert into the device can be solved.

The connection bus bar is divided into a plurality of pieces, and each of the divided connection bus bars connects at least one required number of the lower case side electric wire and the upper case side electric wire. The circuit configuration can be easily changed or a short circuit can be taken.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one step of a manufacturing process of an electric junction box according to an embodiment of the present invention.

FIG. 2 is a perspective view showing another step of the present invention.

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

FIG. 4 is an enlarged exploded perspective view of a main part of the present invention.

FIG. 5 is a sectional view showing an assembled state of the electric junction box of the first embodiment.

FIG. 6 is a schematic view showing another embodiment of the present invention.

FIG. 7 is a schematic view showing another press-fitting mode between the connection bus bar and the electric wire of the present invention.

FIG. 8 is a perspective view showing a conventional example.

FIG. 9 is a sectional view showing a conventional example.

FIG. 10 is a schematic diagram showing a problem of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Lower case 12 Upper case 13, 14 Connector 5 Pressure contact terminal 16, 18 Insulation board 17 Bus bar w Electric wire (single core wire) w-1 Lower case side electric wire w-1a Cutting part w-1b Refraction part w-2 Upper case side electric wire w- 2a cutting part w-2b bending part 10 (10-1 to 10-11) connecting bus bar 10a vertical part 10c, 10d vertical horizontal part 10e, 10f press-fitting slot 15 cover

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shigeru Kato 1-114 Nishisuehirocho, Yokkaichi-shi, Mie Sumitomo Wiring Systems, Ltd. (72) Inventor Akinori Oishi 1-114, Nishisuehirocho, Yokkaichi-shi, Mie Sumitomo Wiring Systems (56) References JP-A-8-227736 (JP, A) JP-A-5-258813 (JP, A) JP-A-9-65546 (JP, A) (58) Fields investigated (Int. Cl. ^7, DB name) H02G 3/16 H01R 4/24 H01R 4/58

Claims (5)

(57) [Claims] An electric wire which is laid along inner surfaces of a lower case and an upper case, respectively, and which is connected to a press-fit terminal which is driven into a connector attached to the lower case and the upper case, is connected to a side surface of the lower case and the upper case. Are connected by pressure contact blades provided on both the upper and lower sides of the connection bus bar, and the connection bus bar is divided into a plurality of pieces, each of which is divided.
The connection busbar is connected to the lower case side electric wire and the upper case.
An electrical connection box, wherein one or more required side wires are connected. 2. The electric wires laid on the inner surfaces of the lower case and the upper case are laid in a single stroke in a state where the lower case and the upper case are arranged in parallel in an expanded shape, and then at a position between the lower case and the upper case. The electrical junction box according to claim 1, wherein the electrical junction box is a cut wire or an electric wire separately laid on a lower case side and an upper case side. (3)Inner surface of lower case and upper case
Along with the lower case and the lower case.
And the connector attached to the upper case
Connect the wire that is crimped to the crimp terminal to the lower case
The upper and lower sides of the connection bus bar placed on the side of the upper case
It is connected by the pressure contact blade provided on the side, Turn the cut part of the wire upward on the lower case side
While refracting, it is refracted downward on the upper case side.
And the connection bus bar is bent from both ends of the vertical part
With upper and lower horizontal parts.
The notched press-fitting slot is attached to the wire bent up and down.
It is characterized by being pressed from the side Electrical connection
box. (4)Inner surface of lower case and upper case
Along with the lower case and the lower case.
And the connector attached to the upper case
Connect the wire that is crimped to the crimp terminal to the lower case
The upper and lower sides of the connection bus bar placed on the side of the upper case
It is connected by the pressure contact blade provided on the side, Attached to the side of the lower case and upper case
The connection busbar is covered with an insulating resin cover
Characterized by Electrical junction box. (5)Inner surface of lower case and upper case
Along each line And the lower case and
And the connector attached to the upper case
Connect the wire that is crimped to the crimp terminal to the lower case
The upper and lower sides of the connection bus bar placed on the side of the upper case
It is connected by the pressure contact blade provided on the side, Wires and pressures of the lower case and upper case
An insulating plate is interposed between circuits consisting of combinations of contact terminals
The bus bar is arranged and the circuit consisting of the electric wire and the insulation displacement terminal
And a bus bar circuit. Electrical
Connection box.