JPH11187540A - Electrical junction box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrical junction box, with which a wiring harness can be wired between case main parts and a cover conveniently, and which can be assembled easily without trouble. SOLUTION: An electrical junction box 1 has case main parts 4 and 5 in which branch circuits are housed. Electronic components are mounted on the case main parts, and a wiring harness is connected to the case main parts. A restricting part 5f whose tip is tapered and which restricts the wiring direction of the wiring harness is provided on the case main part 5. Further, a cover 6 is attached so as to cover a surface on which the restricting part 5f is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric junction box mounted on an automobile or the like.

[0002]

2. Description of the Related Art An electric connection box is formed, for example, by fitting an upper case and a lower case through a bus bar having a branch circuit between both members to form a case main body. The lower cover is attached to the lower case, and assembled, and various wire harnesses are connected.

[0003]

In the electric junction box, a wire harness is connected by connecting a connector to a housing formed in a lower case, and a plurality of wire harnesses extend from the lower case. For this reason, it is necessary to assemble the electric connection box while carefully routing the wire harness so that the wire harness is not caught or interfered between the lower case and the lower cover during assembly. When the harness is caught, the lower case cannot be attached, and the lower case must be reattached.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and provides an electric connection that can easily arrange a wire harness between a case main body and a cover, and can be easily assembled without any trouble. The purpose is to provide boxes.

[0005]

According to the present invention, in order to achieve the above object, there is provided a case body containing a branch circuit, in which electronic components are mounted and a wire harness is connected to the case body. In the connection box, the case body has a tip portion formed in a tapered shape, and a regulating portion for regulating a wiring direction of the wire harness is provided,
The configuration is such that a cover is attached so as to cover the surface on which the regulating portion is provided.

[0006]

When the cover is attached to the case body while routing the wire harness using the regulating portion, even if the wire harness is likely to interfere with the regulating portion, the wire harness slides outward along the taper at the tip of the regulating portion. Therefore, the wire harness does not interfere with the restricting portion and does not bite between the restricting portion and the cover.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
This will be described in detail with reference to FIGS. The electrical junction box 1
As shown in FIG. 1, a case body is divided into upper covers 2 and 3, an upper case 4 and a lower case 5, and these are made of synthetic resin such as nylon (including polymer alloy), polypropylene, and polybutylene terephthalate. Is molded.

The upper covers 2 and 3 are detachably attached to a first section 4a and a second section 4b of an upper case 4 to be described later, respectively, to prevent water, dust and the like from entering the electric connection box 1. I do. The upper case 4 has a first rectangular shape in plan view.
In this case, a first section 4a and a second section 4b are formed, and a housing (not shown) for mounting electronic components such as various fuses and relays is formed in each section 4a, 4b. As shown in FIG. 1, the upper case 4 includes an extension bracket 4 extending downward from the side wall 4c.
In three places d (one place is not shown), a locking projection 4e and a release stopper 4f surrounding the outside of each locking projection 4e are formed integrally at an appropriate position below the side wall 4c. I have.

The lower case 5 has a long side wall 5b and a short side wall 5c formed around the bottom wall 5a, and a bus bar having a branch circuit formed between the lower case 5 and the upper case 4. This is a second case having a rectangular shape in plan view, which is fitted into the inside of the upper case 4 from below with a not shown) interposed therebetween.
As shown in FIG. 1, the bottom wall 5a is formed so that the side walls b are low and the center is high. Bottom wall 5a
As shown in FIG. 2, a large number of male connector housings 51 into which male connectors are inserted are formed from below, and a pedestal 5e protruding downward and having an elongated hole 5d in the center.
(See FIGS. 6A and 6B) are formed on the side wall 5c side between the side walls 5b. Further, the bottom wall 5a is provided with two bosses 5f, each of which has a tapered tip on the lower surface, and protrudes downward. The boss 5f regulates a wiring direction of a wire harness (not shown) connected to the male connector. On the other hand, both side walls 5b and 5c are located at appropriate positions on the outer periphery.
A locking projection 5g that engages with a projection (not shown) provided on the inner periphery of the upper case 4 to fit the lower case 5 to the upper case 4, and is provided near the engagement projection 5g. And a rib 5h for keeping the gap constant.

Here, the upper case 4 is provided with a lower case 5
After fitting to the inside, the lower cover 6 shown in FIG. 4 is attached to the lower part from below. The lower cover 6 is made of a synthetic resin such as nylon (including a polymer alloy), polypropylene, or polybutylene terephthalate, and is a rectangular cover in plan view that covers the lower surface of the electrical junction box 1 on which the boss 5f is provided. A long side wall 6b and a short side wall 6c are formed around a bottom wall 6a formed in a shape, and an outlet 6d for leading the wire harness to the outside is formed at an appropriate position on the side walls 6b, 6c. Have been. Also, the side wall 6
b, 6c are locking projections 4e formed on the upper case 4.
And a guide rib 6f is formed at a position corresponding to the extension bracket 4d.

The bus bar is formed by punching a plate made of copper, copper alloy or brass to form a branch circuit, but may be a single bus bar or a plurality of bus bars laminated with an insulating plate interposed therebetween. Often, in the present embodiment, a plurality of layers are used. As shown in FIG. 1, the electrical junction box 1 configured as described above has the covers 2 and 3 attached to the first section 4 a and the second section 4 b of the upper case 4, and is connected to the upper case 4. A lower case 5 is inserted into the upper case 4 from below with a bus bar (not shown) interposed therebetween.
After assembling as shown in FIG. 2, the lower cover 6 shown in FIG. 4 is attached to the lower part of the upper case 4 from below to complete the assembly.

Here, in the electrical junction box 1 of the present invention, a boss 5f for regulating the wiring direction of a wire harness (not shown) connected to the male connector is provided on the lower case 5 so as to protrude downward. ing. For this reason, the electrical junction box 1
In the final stage of assembly, the lower case 5 and the lower cover 6
The lower cover 6 can be attached to the lower part of the upper case 4 while using the boss 5f to handle the wire harness 10 between the two.

Further, as shown in FIG. 5, even if the wire harness 10 exists immediately below the boss 5f, the wire harness 10 slides outward along the taper at the tip of the boss 5f. As a result, the wire harness 10 includes the boss 5f and the lower cover 6.
Of the electric junction box 1 can be easily assembled without trouble.

Further, the lower cover 6 includes the extension bracket 4
Guide ribs 6f are formed on the side walls 6b and 6c at positions corresponding to d. Therefore, unless the guide ribs 6f correspond to the extension brackets 4d, the lower cover 6 cannot be attached to the lower portion of the upper case 4 because they interfere with each other. Thereby, by using the lower cover 6,
The operator immediately notices that the assembly is erroneous, and the workability of the assembly in the electrical junction box 1 is improved.

On the other hand, the electric junction box 1 is shown in FIGS.
As shown in (a), a pedestal 5e provided with a long hole 5d is formed on the bottom wall 5a of the lower case 5. Therefore, in the electric connection box 1, as shown in FIG. 6B, for example, when the clamp 10b of the female connector 10a attached to one end of the wire harness 10 is attached to the long hole 5d, the clamp 10b is connected to the long hole 5d. Along the direction of the arrow. Thus, the electric connection box 1 absorbs the excess length (slack) of the wire harness 10 or changes the interference between the wire harness 10 and the lower cover 6 by appropriately changing the position of the clamp 10 b in the elongated hole 5 d of the lower case 5. Can be eliminated, and the inside of the wiring harness 10 can be more easily handled.

In the electric connection box 1, a release stopper 4f surrounding the outside is formed on each locking projection 4e provided below the side wall 4c of the upper case 4. For this reason, in the electric connection box 1, when the lower cover 6 is attached to the lower part of the upper case 4, as shown in FIG. 7, each locking projection 4 e of the upper case 4 engages with the corresponding lock 6 e of the lower cover 6. I do. At this time, since the locking projection 4e engaged with the lock 6e is surrounded on the outside by the release stopper 4f, even if an object collides with the distal end side of the lock 6e, the locking projection 4e and the locking projection 4e are not separated from each other. Can be prevented from being disengaged, and the lock 6e can be prevented from being damaged.

In the present embodiment, the case main body is divided into the upper case 4 and the lower case 5, but may be formed as a single body. Alternatively, instead of the bus bar, a terminal provided with a branch circuit may be used. Is also good.

[0018]

According to the first aspect of the present invention, there is provided an electric connection box in which the wire harness can be conveniently routed between the case body and the cover, and can be easily assembled without any trouble. can do.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an electric junction box of the present invention.

FIG. 2 is a perspective view of a lower case of a case main body constituting the electric connection box of FIG. 1 as viewed from below.

FIG. 3 is a perspective view showing a state where the electric junction box of FIG. 1 is assembled.

FIG. 4 is a perspective view of a lower cover attached to a lower portion of the electric connection box shown in FIG. 3;

FIG. 5 is a cross-sectional view showing a relationship between a wire harness and a boss of the lower case in a space between the upper case and the lower cover when the electric junction box of FIG. 1 is assembled.

FIG. 6 is a sectional view (FIG. 6B) showing a pedestal of the lower case (FIG. 6A) and a clamp of the wire harness 10 attached to the pedestal.

FIG. 7 is a perspective view showing an engagement state between a locking projection and a corresponding lock when the lower cover is attached to the upper case.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric connection box 2, 3 Upper cover 4 Upper case (case main body) 4a 1st section 4b 2nd section 4c Side wall 4d Extension bracket 4e Locking projection 4f Release stopper 5 Lower case (case main body) 5a Bottom wall 5b Side wall (long side) 5c Side wall (on the short side) 5e Pedestal 5f Boss (restricting part) 5g Locking projection 5h Rib (holding part) 6 Lower cover 6a Bottom wall 6b Side wall (on the long side) 6c Side wall (on the short side) 6d Outlet 6e Lock 6f Guide rib 10 Wire harness 10a Female connector 10b Clamp 51 Housing

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Mitsuo Tanaka 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Inside Furukawa Electric Co., Ltd. (72) Tomotaka Watanabe 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd. (72) Inventor Norihiro Kawazoe 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd. (72) Tadashi Ikezawa 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd.

Claims (1)

[Claims] A case body accommodating a branch circuit;
In the electrical connection box in which the electronic component is mounted on the case main body and the wire harness is connected, the case main body is provided with a regulating portion having a tip formed in a tapered shape and regulating a wiring direction of the wire harness. An electrical connection box, wherein a cover is attached so as to cover a surface on which the restricting portion is provided.