JP2871475B2 - Electrical junction box insulation board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulating plate of an electric connection box for connecting a wiring harness for an automobile, and more particularly, to a method for connecting a part or all of an internal circuit of an electric connection box for branching and connecting circuits in a concentrated manner. The present invention relates to an insulating plate of an electric connection box, which is configured by press-contact terminals that press-contact an electric wire.

[0002]

2. Description of the Related Art Conventionally, when a part or all of an internal circuit of an electric connection box is constituted by electric wires and press-contact terminals for press-contacting the electric wires, an upper case, a lower case, or an insulating plate accommodated in these cases. The wiring structure is such that wires are wired in a required pattern to a separately provided wiring die in a predetermined pattern, and then transferred to the case or the like and connected to the pressure-connecting terminals.

[0003]

However, in such a wiring structure, a wiring die is required for wiring the electric wires.
If the wiring pattern is different, a mold must be separately manufactured according to the pattern. Also, once the wire
After wiring in the mold, it must be transferred to a case or the like, which requires a lot of work. That is, there is a problem that costs are increased.

In order to solve these problems, the applicant of the present application has previously proposed the following wiring structure (see Japanese Patent Application No. 6-164281). That is, as shown in FIG. 7, a wiring groove 2 is formed in an insulating plate 1, an electric wire 3 is inserted into the wiring groove 2,
Is press-fitted into a press-contact terminal driving portion 5 formed on the insulating plate 1 so as to achieve an electrical connection with the electric wire 3.

However, as described above, simply the insulating plate 1
In the case where a plurality of electric wires 3 are laid only by forming the wiring grooves 2 in the wiring, the wiring grooves 2 are required for each electric wire 3. The wiring groove 2 is for positioning the electric wire 3 with respect to the insulating plate 1 so that the press contact terminal 4 can be press-fitted. Therefore, in places where the press contact terminals 4 are not press-fitted, it is not always necessary to separate the juxtaposed electric wires 3 by the wiring grooves 2, and there is a problem that the formation of the wiring grooves 2 causes the insulating plate 1 to be large. In view of the above problems, an object of the present invention is to provide a wiring structure of an electric junction box that can be reduced in size while reducing costs.

[0006]

To achieve the above object, according to the first aspect of the present invention, there is provided an insulating plate housed in a case, wherein an electric wire is inserted one by one into at least one surface of the insulating plate. Press-connecting terminal electrically connected to the electric wire by forming an electric wire groove formed by connecting an independent groove and a common groove into which a plurality of the grooves are inserted collectively, and increasing a groove width of a required portion of the independent groove. Is formed.

In the invention according to claim 2, the common groove is formed by:
The depth is such that a plurality of electric wires can be inserted one above the other.

According to the third aspect of the present invention, the corners connecting the respective independent grooves and the common groove are formed sequentially inside from the outer edge side of the insulating plate, so that the electric wires are arranged side by side in the common groove. It is one that can be drawn.

According to the fourth aspect of the present invention, at least one surface of the insulating plate housed in the case is opposed to the insulating plate at a predetermined interval, and the independent guide projection independently guides the plurality of electric wires. A projection for an electric wire comprising a common guide projection for guiding the electric wires collectively is provided, and a press-contact terminal is press-fitted into at least one of the independent guide protrusions, and a driving portion of the press-contact terminal electrically connected to the electric wire. Is formed.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. (First Embodiment) FIG. 1 shows an electric junction box according to a first embodiment. As shown in FIG. 2, the electrical junction box generally has a structure in which an insulating plate 13 is sandwiched between internal spaces formed by an upper case 11 and a lower case 12.

The cases 11 and 12 are formed by molding an insulating synthetic resin material such as polypropylene. A cylindrical fuse fitting portion 14 and a connector fitting portion 15 are protruded from the outer surfaces of the two cases 11 and 12, respectively, and terminal holes are formed on the bottom surfaces of the fitting portions 14 and 15 (the surfaces of the cases 11 and 12). 16 are provided. The fittings 14 and 15 are connected to connectors (not shown) provided on fuses and electric wires extending from various electrical components.

The insulating plate 13 is provided with the two cases 11, 1
The same material as that of No. 2 was molded. Insulating plate 13
The wiring groove 17 is formed in a required pattern on one surface of the substrate. The wiring groove 17 includes an independent groove 18 and a common groove 19. As shown in FIG. 3, the grooves 18, 19 are continuously provided near the corner of the insulating plate 13 so as to be substantially orthogonal to each other along the outer edge. Have been.

The independent groove 18 is provided with an electric wire 20 (thick electric wire 20A).
Alternatively, the width is formed to be substantially the same as or slightly smaller than the outer diameter of the thin electric wire 20B). However, the independent groove 18
Are formed deeper by the outer diameter of the electric wire 20 to be arranged in order from the outer edge side of the insulating plate 13. Also,
In the independent groove 18, press-contact terminal driving portions 21 that are respectively opened on the front and back surfaces of the insulating plate 13 are formed by expanding the groove width. On the other hand, the width dimension of the common groove 19 is the same as that of the independent groove 18 for the thick wire, and the depth dimension is
The independent groove 18 is formed to be the same as the deepest one.

There are two types of press-contact terminals 22, which are press-fitted into the press-contact terminal driving section 21, for a thick wire and a thin wire. As shown in FIG. It was formed into a shape. Specifically, the press contact terminal 2
Reference numeral 2 denotes a shape having a male input / output terminal portion 22a at one end portion and a wire press-contact portion 22c having a bifurcated branch at the other end portion and a slot 22b at the center portion. Wire crimping part 22c
Is the insulation coating 2 of the electric wire 20 which is press-fitted into each press-contact terminal driving portion 21 of the insulating plate 13 and laid in advance in the wiring groove 17.
Oa is cut off at both side edges constituting the slot 22b, and is electrically connected to the core wire 20b. On the other hand, the input / output terminal portion 22a holds the insulating plate 13 between the cases 11 and 12.
By being accommodated, each fitting portion 1 is inserted through the terminal hole 16.
It projects into 4,15.

Next, a method of assembling the electric junction box having the above configuration will be described. First, the wiring groove 17 of the insulating plate 13
The wire 20 is directly inserted into the wiring groove 17 by a wire feeder (not shown) with the surface on which the is formed facing upward. Electric wire 2
Insertion of 0 is performed in order from the deepest one of the independent grooves 18. As a result, in the common groove 19, the electric wires 20 laid in a deeper part of the independent groove 18 are sequentially laid in a stacked state.

Subsequently, the wire press-contact portions 22c of the press-contact terminals 22 are press-fitted into the press-contact terminal driving portions 21. During this press-fitting operation, the electric wire 20 is cut off the insulating coating 20a by both side edges of the slot 22b, and the core wire 20b contacts. In this manner, the press contact terminals 22 are sequentially press-fitted into the insulating plate 13.
By fixing the insulating plate 13 in the cases 11 and 12,
By detecting the state of conduction between the press-connecting terminals 22 before accommodating the wire, it is possible to reliably detect whether or not the electrical connection between the press-connecting terminals 22 and the electric wires 20 is defective.

Thereafter, the opening edges of both cases 11 and 12 are fitted and integrated so that the insulating plate 13 is sandwiched between the upper case 11 and the lower case 12. At this time, the input / output terminal portion 22a of the press contact terminal 22 projects into the corresponding fitting portion 14, 15 via the terminal hole 16.

In the electric junction box assembled as described above, a power supply side circuit is constituted by the thick electric wire 20A and the press contact terminal 22 press-connected to the electric wire 20A. A fuse is connected to the input / output terminal 22a. A load-side circuit is constituted by the thin electric wire 20 </ b> B and the press contact terminal 22 press-connected to the electric wire 20 </ b> B, and by fitting a connector into the connector fitting portion 15, various electric components are connected via the press contact terminal 22. The component and the electric wire 20 are electrically connected. That is, according to the electric connection box, since the bus bar is not used in the internal circuit, if the wiring groove 17 is formed in the insulating plate 13 in accordance with the wiring pattern expected in advance, the design change of the internal circuit can be performed. Can be flexibly handled.

In the electric junction box, the electric wire 20 is inserted directly into the wiring groove 17 of the insulating plate 13.
There is no need for a wiring mold, and therefore, the case 1
The work of transferring the electric wire 20 to 1, 12, etc. is not necessary,
Cost reduction has been realized. In the common groove 19, a plurality of electric wires 20 can be collectively laminated and laid in the thickness direction of the insulating plate 13. Therefore, the dimension in the plane direction of the insulating plate 13, specifically, the width direction of the common groove 19 is reduced. It can be suppressed and can be made compact.

(Second Embodiment) FIG. 4 shows an insulating plate 23 housed in an electric junction box according to a second embodiment. This second
In the embodiment, the other components are substantially the same as those of the first embodiment, so that the illustration and description thereof are omitted here.

The insulating plate 23 has an independent groove 18 and a common groove 19 as in the first embodiment. The width of the independent groove 18 is substantially the same as or slightly smaller than the outer diameter of the electric wire 20 to be provided. The depth dimension is formed at least twice the outer diameter of the electric wire 20. On the other hand, in the common groove 19, the width dimension is equal to or greater than the sum of the outer diameters of the electric wires 20 extending from the continuous independent grooves 18, and the depth dimension is the same as the independent groove 18.

In such an insulating plate 23, when the electric wires 20 are inserted into the wiring grooves 17, the electric wires 20 arranged in the respective independent grooves 18 are arranged side by side in the width direction by the common grooves 19. For this reason,
The common groove 1 is formed while suppressing an increase in the dimension of the insulating plate 23 in the thickness direction.
By arranging the electric wires 20 in a contact state at 9, it is possible to reduce the width dimension.

(Third Embodiment) FIGS. 5 and 6 show an insulating plate 24 of an electric junction box according to a third embodiment. In the third embodiment, as in the second embodiment, the other components are substantially the same as those of the first embodiment, and thus illustration and description thereof are omitted.

The insulating plate 24 differs from the above embodiments in that it does not have the wiring groove 17 and has on its surface wire projections (independent guide projections 25a, 25a) for guiding the wires 20.
5b and the common guide projection 25c) are protruded. These electric wire projections 25a, 25b, 25c are formed of a pair of opposing walls 26 and are provided at required locations on the surface of the insulating plate 24. 24) have a curved shape so that the electric wire 20 can be bent without difficulty. Wire projection 2
5a is for a thin wire, and the wire projection 25b is for a thick wire. The electric wire projection 25c guides both electric wires 20 at the same time. Specifically, the wire projection 25c is
0 in a contact state, and the insulating plate 2 in the direction of the arrow in FIG.
4 can be reduced. In this case, since it is only necessary to guide the wiring by the wire projections 25a, 25b, 25c, the wiring can be performed more easily than when the electric wire 20 is inserted into the wiring groove 17. As shown in FIG. 6, the wire projections 25 a, 25 b, and 25 c are provided with press-contact terminal driving portions 27 for press-fitting the wire press-contact portions 22 c of the press-contact terminals 22.

In each of the above embodiments, the insulating plates 13 and 2
Wiring groove 17 or wire projection 2 only on one side of 3, 24
Although 5a, 25b and 25c are provided, it goes without saying that they may be provided on both sides.

[0026]

As is apparent from the above description, according to the present invention, the wiring groove is formed in the insulating plate, and the press contact terminal is press-fitted into the press contact terminal driving portion formed in the independent groove.
A conventional wiring mold is not required, and the cost can be reduced. Further, the connection of the electric wire to the wiring and the press contact terminal can be stably performed, and the quality can be determined before the completion of the assembly. Furthermore, since the electric wires respectively provided in the independent grooves can be collectively provided in the common groove, the size of the insulating plate does not increase.

In particular, according to the second aspect of the present invention, the increase of the insulating plate in the plane direction can be suppressed, and in the third aspect of the invention, the increase of the insulating plate in the thickness direction can be suppressed.

According to the fourth aspect of the present invention, since the electric wires can be positioned by the electric wire projections instead of the wiring grooves, the insulating plate can be manufactured at a lower cost.

[Brief description of the drawings]

FIG. 1 is a perspective view of an electric junction box according to a first embodiment.

FIG. 2 is a partial sectional view of FIG.

FIG. 3 is a partially enlarged perspective view of a part of the insulating plate according to the first embodiment;

FIG. 4 is a partially enlarged perspective view of a part of an insulating plate according to a second embodiment.

FIG. 5 is a plan view of an insulating plate according to a third embodiment.

6 is a partially enlarged perspective view of FIG.

FIG. 7 is a partially enlarged perspective view of a part of an insulating plate housed in an electric junction box according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Upper case 12 Lower case 13 Insulating plate 17 Wiring groove 18 Independent groove 19 Common groove 20 Electric wire 21 Press-fit terminal insertion part

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takahiro Onizuka 1-114, Nishisuehiro-cho, Yokkaichi-shi, Mie Sumitomo Wiring Systems, Ltd. (72) Inventor Yuji Osaka 1-14-1, Nishisuehiro-cho, Yokkaichi-shi, Mie Sumitomo Wiring Systems (56) References JP-A-6-2955752 (JP, A) JP-A-4-64923 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) H02G 3/08 -3/20

Claims (4)

(57) [Claims] 1. An insulating plate housed in a case,
On at least one surface thereof, there is formed an electric wire groove formed by connecting an independent groove into which electric wires are inserted one by one and a common groove into which a plurality of electric wires are inserted collectively, and a groove width of a required portion of the independent groove is formed. An insulating plate for an electric connection box, wherein a pressing portion of a press contact terminal electrically connected to the electric wire is formed by expanding the electric wire. 2. The insulating plate for an electric junction box according to claim 1, wherein said common groove has a depth that allows a plurality of electric wires to be inserted one above the other. 3. An electric wire can be laid in a side-by-side state in the common groove by forming a corner portion connecting the independent groove and the common groove in order from the outer edge side of the insulating plate. The insulating plate of an electrical junction box according to claim 1, wherein: 4. An independent guide projection that opposes at least one surface of an insulating plate housed in a case at a predetermined interval and guides a plurality of wires separately and independently, and a plurality of wires collectively. An electric wire projection comprising a common guide projection for guiding is protrudingly provided, and at least one of the independent guide projections is formed with a press-contact terminal driving portion for press-fitting the press-contact terminal and electrically connecting to the electric wire. The electrical connection box insulation plate.