JP2580623Y2 - Electrical junction box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an improvement in a wire drawing portion of an electric junction box including a press contact terminal and a wire pressed into a slot thereof.

[Conventional technology]

2. Description of the Related Art Conventionally, in an electrical connection box such as a relay box, a fuse box, or a branch connection box, a bus bar punched and formed from a conductive metal plate is frequently used as a component of an internal circuit. However, the use of busbars has a disadvantage that the circuit configuration becomes complicated, and the circuit design must be redone when the vehicle type or grade is different or when some specifications are changed.

Therefore, an electric connection box (branch connection box) using electric wires and press-connecting terminals as shown in FIGS. 11 and 12 has been conventionally proposed (JP-A-61-36965).

In these drawings, reference numeral 1 denotes an upper case, 2 denotes an electric wire receiving groove, and 3 denotes a press contact terminal. The group of electric wires 4 pulled out from the wire harness is arranged in the electric wire accommodating groove 2 and is press-fitted and connected to the slot 6 of the press contact terminal 3 inserted into the insertion hole 5 of the upper case 1.

Conventionally, as shown in FIG. 12, the electric wire 4 is bent and fixed to the projection 7 of the upper case 1 to protect the press-contact terminal 3 and the press-contact portion of the electric wire 4 from the tensile force applied to the electric wire 4. The strength against the tensile force is provided so as not to adversely affect the press-contact portion.

However, in such a conventional method, since the electric wire 4 escapes from the electric wire accommodating groove 2 at the base portion 8 of the protruding portion 7, when the lower case 9 is covered and the electric wire 4 group is clamped, the press contact portion is not provided. There is a problem that an excessive force is applied and the press-contact portion is adversely affected.

[Problems to be solved by the invention]

The present invention has been made in view of the above problems, and an object of the present invention is to provide an electric junction box having a structure that does not adversely affect a press-contact portion between a wire and a press-connecting terminal even when an external force acts on the wire.

[Means for solving the problem]

In order to achieve the above object, an electric junction box according to the present invention comprises an insulating case, a plurality of press-connecting terminals incorporated in the insulating case, electric wires respectively press-connected to slots of these press-connecting terminals, and the insulating case. An electric connection box comprising a case cover or another insulating case superimposed on, and drawing out the electric wire to the outside from a superposed surface of the insulating case and the case cover or the other insulating case. A concave and convex portion is provided on at least one of the overlapping surfaces to be drawn out, and a wire drawing groove is formed on at least one of the overlapping surfaces.
An uneven portion is provided at a groove bottom of the wire drawing groove, and the overlapping surface and the insulating coating of the wire are welded to each other.

[Action]

According to the electrical junction box of the present invention having the above-described configuration, uneven portions are provided between the insulating cases or on the overlapping surface of the insulating case and the case cover, and these insulating cases and the case cover or other insulating cases and wires are provided. Since the insulating coatings are welded to each other, the electric wires are securely welded and fixed to the overlapped surface, so that even if an external force (tensile force) acts on the electric wires, the electric wires are not affected inside the electric connection box. In addition, it is possible to protect the press contact portion between the electric wire and the press contact terminal. Therefore,
It is possible to provide an electric connection box with high reliability of electric connection.

In addition, since the electric wires are accommodated in the electric wire draw-out groove, the overlapping surfaces of the insulating case and the like can be brought into close contact with each other at the time of welding, and in combination with the provision of the uneven portion at the groove bottom,
Welding of the electric wire and the insulating case can be performed more effectively.

Further, the electric wire can be easily positioned by the electric wire drawing groove.

〔Example〕

Hereinafter, embodiments of the electric junction box of the present invention will be described with reference to the drawings.

1 to 4 (a) and (b), reference numeral 11 denotes an electric connection box according to the present embodiment, and a plurality of insulating cases 12 ₁ , 1.
2 ₂ , a plurality of electric wires 13 constituting a wire harness are arranged side by side at a predetermined pitch, and one end side thereof is laminated in a stepwise manner. The lowermost layer is a case cover 14.

These insulating case 12 _1, 12 ₂ ..., insulating coating 13a of the case cover 14 and the wire 13, is formed by the respective same synthetic resin material.

As shown in FIGS. 2 and 3, each insulating case 12 ₁ , 1
2 ₂ … is a shallow box, one of its peripheral walls 12a
In addition, a plurality of wire drawing grooves 15 are provided at a predetermined pitch. It is preferable that the depth of the wire drawing groove 15 is smaller than the outer diameter of the wire 13 so that the insulating coating 13a slightly protrudes from the wire drawing groove 15 (see FIG. 4 (a)). An uneven portion 16a is provided on the overlapping surface 16 of the peripheral wall 12a and the groove bottom of the electric wire drawing groove 15.

Incidentally, the wire drawer groove 15, as shown in FIG. 8, each of the two insulating case 12 ₁ and 12 ₂ and the half groove 15a, 15
It may be provided as a.

Returning to FIG. ₁ , a fuse cavity 17 and a relay cavity 18 are provided on the outer surface of the insulating case 12 ₁ , 12 ₂ ... On the side of the step-like portion. An interlayer connection hole 19 is provided penetrating vertically.

As shown in FIG. 5, a press contact terminal 20 is accommodated in the fuse cavity 17 and the relay cavity 18. The press contact terminal 20 has an electric contact portion 20a at one end with a mating terminal and a press contact portion 2 having a slot 20c at the other end.
It has 0b. A desired electric wire 13 is pressed into the slot 20c.

Each of the insulating cases 12 ₁ , 12 ₂ ,.
As shown in the figure, the terminal accommodating portions correspond to the respective interlayer connection holes 19.
The terminal accommodating portion 21 has a press contact terminal 22 for interlayer connection.

The interlayer connection pressure contact terminal 22 has a rectangular cylindrical electric contact portion 23 having an elastic contact piece 23a provided therein, and a pressure contact portion 24 having a slot 24a.

A desired electric wire 1 is inserted into the slot 24a of the insulation displacement terminal 22 for interlayer connection.
By pressing 3 and inserting the short bar 25 into the electric contact portion 23, the electric wires 13 (circuits) of each layer are connected between layers.

In the above configuration, for example, each of the press contact terminals 20 of the insulating cases 12 ₁ , 12 ₂ ,.
After the electric wires 13 are pressed into contact with the wires 24a, the electric wires 13 are drawn out one by one from the wire drawing groove 15 to assemble a wiring board.

At this time, as shown in FIG.
Becomes slightly protruded state from the wire drawer groove 15, in this state, overlapped with the insulating case 12 ₁ and 12 _2, the overlapping surface 16, 16 of mutually while pressurizing using a jig (not shown) from the top and bottom Welding is performed by known means such as ultrasonic welding.

According to the electric connection box 11 of such embodiment, by forming the uneven portion 16a to the overlapping surface 16, such as the insulation case 12 _1, to perform the welding, such as those insulating case 12 ₁ easily and reliably can be, the insulating coating 13a of the wire 13 can be integrally welded and fixed with the insulating casing 12 _1, and the like.

Thus, even if a tensile force acts on the electric wire 13 from the outside of the electric connection box 11, the inside of the electric connection box 11 is not affected by the tensile force and the press-contact portions between the electric wire 13 and the press-contact terminals 20 and 22 are protected. And a stable electrical connection state can be maintained.

Also, since the electric wire 13 is accommodated in the electric wire drawing groove 15,
At the time of welding, the superposed surfaces of the insulating cases 12 ₁ , 12 _2, etc. can be brought into close contact with each other, and in combination with the provision of the uneven portion 16 a at the groove bottom, the electric wire 13 and the insulating cases 12 ₁ , 12 ₂ … Etc. can be more effectively performed.

Further, there is an effect that the electric wire 13 can be easily positioned by the electric wire drawing groove 15.

In addition to this, insulating cases 12 ₁ , 12 ₂ …, case cover 14
And by forming the insulating coating 13a of the electric wire 13 by the same synthetic resin material, these members mutually,
It can be firmly welded in a stable state.

Here, FIG. 9 and FIG. 10, which shows another embodiment of an electrical connection box according to the present invention, when the material of the insulating coating 13a of the insulating case 12 ₂ and the wire 13 are different, the insulating case 1
The welding of 2 ₂ and the wire 13 is obtained by easily and reliably performed so.

For example, the insulating case 12 ₂ made of polypropylene, the wire 13
Of the case where the insulating coating 13a is made of polyvinyl chloride, with the provision of the holder receptacle 27 in the peripheral wall of the insulating case 12 _2,
An electric wire holder 26 made of polyvinyl chloride having a plurality of electric wire drawing grooves 15 ′ is detachably fitted to the holder receiver 27.

A notch 28 is provided in the opposite wall of the holder receiver 27 so as to correspond to the wire drawing groove 15 '.

According to this structure, even if the material of the insulating coating 13a of the insulating case 12 ₂ and the wire 13 are different, by using the wire holder 26 of the same material as the insulating coating 13a, firmly the wire 13 in a stable state Can be fixed by welding.

In each of the above-described embodiments, the internal circuit of the electric connection box 11 is constituted only by the electric wire 13, the press contact terminal 20, and the press contact terminal 22 for interlayer connection. However, the internal circuit may be constituted by combining bus bars. .

[Effect of the invention]

As described above, according to the electric junction box of the present invention, the electric wires are welded and fixed to each other between the insulating cases or to the overlapping surface of the insulating case and the case cover. ) Acts inside the electric junction box without being affected by the influence, and can protect the wire and the press-contact portion of the press-connecting terminal. Therefore, it is possible to provide an electric connection box with high reliability of electric connection.

[Brief description of the drawings]

1 is a perspective view of an electric junction box showing one embodiment of the present invention, FIG. 2 is an exploded perspective view of the same from the back side, FIG. 3 is a sectional view taken along the line III-III of FIG. 4 (a) and 4 (b) are cross-sectional views of main parts showing before and after welding between the electric wire and the insulating case, respectively. FIG. 5 is an enlarged perspective view of main parts of FIG. 1, and FIG. 1 is an enlarged perspective view of a main part of FIG. 1, FIG. 7 is a cross-sectional view taken along the line VII-VII of FIG. 6, FIG. 8 is a cross-sectional view of a main part showing another embodiment of the wire drawing groove, and FIG. FIG. 10 is an exploded perspective view of a partially assembled state of FIG. 9, and FIGS. 11 (a) and 11 (b) are perspective views of a lower case of a conventional branch junction box, respectively. FIG. 12 is a perspective view showing a state before and after arranging the electric wires. FIG. 12 is a sectional view of a main part showing an assembled state of the above-described conventional branch junction box. 11… Electrical junction box, 12 ₁ , 12 ₂ …… Insulated case, 13 …… Electric wire, 13a …… Insulated coating, 14 …… Case cover, 15,15 '…
… Wire outlet groove, 16… Laminated surface, 20… Press terminal, 22… Press terminal for interlayer connection, 20c, 24a… Slot

 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-58-35507 (JP, A) JP-A-2-207466 (JP, A) JP-A-62-58570 (JP, A) 77272 (JP, U) Fully open 1986-161880 (JP, U) Fully open 1988-1986 (JP, U) Fully open 1986-77501 (JP, U) Fully open, 61-36965 (JP, U)

Claims (3)

(57) [Scope of request for utility model registration] An insulation case, a plurality of insulation displacement terminals incorporated in the insulation case, electric wires respectively press-fitted to slots of these insulation displacement terminals, and a case cover or other insulating material superimposed on the insulation case. And a case, wherein the electric connection box is formed by drawing out the electric wires from a superimposed surface of the insulating case and the case cover or the other insulating case. An uneven portion is provided, an electric wire lead-out groove is formed on at least one of the overlapping surfaces, and an uneven portion is further provided on a groove bottom of the electric wire lead groove, and the overlapping surface and the insulating coating of the electric wire are welded to each other. An electric junction box characterized by the following. 2. The electric junction box according to claim 1, wherein said insulating case, said case cover or said another insulating case and said electric wire are formed of the same synthetic resin material. 3. The apparatus according to claim 1, wherein at least one of the overlapping surfaces is formed by one surface of a holder made of the same synthetic resin material as the insulating coating of the electric wire, and the one surface of the holder is provided with an uneven portion. Electrical junction box.