JPH0935791A - Cable connection structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable connection structure which can prevent the incorrect connection of cables without a fear of contact failure between cable connections and terminal plugs occurring, by enabling the terminal plugs to be connected in a short time, with the direction of wiring according easily with each other, when fastening the terminal plugs. SOLUTION: A projection 36 is made at one cable connection 22a constituting cable connection structure 20, and a recess 38 is demarcated in the other cable connection 22b. Cables 70a and 70b are connected to the terminal plugs 24a and 24b, and a recess 46 is demarcated in one terminal plug 24a, and a projection 50 is made in the other terminal plug 24b, and bends 48a and 48b, and 52 are made at the tips of the recess 46 and projection 50. The cable connection 22a where the projection 36 is made engages with only the terminal plug 24a where the recess 46 is demarcated, and the cable connection 22b wherein the recess 38 is demarcated engages with only the terminal plug 24b where the projection 50 is made.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire connecting structure for connecting each terminal member of an electric wire having positive and negative poles to an electric wire connecting portion.

[0002]

2. Description of the Related Art An electric wire connection structure according to the prior art is shown in FIG. As can be seen from FIG. 8, this wire connection structure 10 has a pair of plate-shaped wire connection portions 12a and 12b and a tube 17 that covers the ends of the wires 14a and 14b whose ends are exposed to the outside. The terminal lugs 16a and 16b are caulked and fixed to the portions. Holes 18a, 18 defined in the terminal lugs 16a, 16b
Insert the screws 19a and 19b into the wire b
The electric wire connecting portion 1 is formed by screwing into the a and 12b.
2a, 12b and the terminal lugs 16a, 16b are electrically connected.

In this case, in order to prevent positive / negative misconnection, the length of the electric wire 14a connected to the electric wire connecting portion 12a is made short so as not to reach the electric wire connecting portion 12b on the far side, that is, the electric wire. 14a is configured to reach only the electric wire connecting portion 12a to prevent erroneous wiring.

Further, the wires 14a and 14b are provided with an identification mark by changing the color of the wires 14a and 14b, or by attaching a tag having characters or symbols for identifying positive and negative signs, and the like. An identification mark similar to that of 14b is also attached to the electric wire connecting portions 12a and 12b, and when the identification marks are collated at the time of connection, it is possible to easily determine the polarity of voltage or the like by connecting. Wire connection methods are known.

[0005]

However, in the electric wire connection structure 10 according to the above-mentioned prior art, the electric wires 14a,
The difference in length of 14b must be confirmed, which is complicated. Further, attach the terminal lugs 16a and 16b to the screws 19
When fastening to the wire connection portions 12a and 12b with a and 19b,
In order to fix the terminal lugs 16a, 16b so that the wiring directions of the electric wire 14a and the electric wire 14b coincide with each other, the screws 19a, 19b must be fastened while suppressing their rotation with a hand or the like. Efficiency does not improve so much. Also, the terminal lug 16a,
16b wiggles, which causes screws 19a, 1
9b is urged in the rotating direction to loosen the screws 19a and 19b, and the electric wire connecting portions 12a and 12b and the terminal lug 16
There is a concern that contact failure between a and 16b may occur.

Further, in order to prevent misconnection, even if only the electric wire 14b reaches the electric wire connecting portion 12b as described above, if the electric wires 14a, 14b sag, both the terminal lugs 16a, 16b will occur. Is the wire connection part 12
It becomes possible to connect to a and 12b, and it becomes impossible to prevent misconnection.

Further, regarding the identification mark, there is a problem that it is not possible to prevent misconnection due to human error such as oversight of the identification mark.

The present invention has been made to solve the above-mentioned various problems, and when the terminal lug is fastened, the wiring directions can be easily matched and fastened in a short time.
It is an object of the present invention to provide an electric wire connection structure capable of preventing misconnection of electric wires without concern that poor contact between the electric wire connection portion and the terminal lug may occur.

[0009]

In order to achieve the above-mentioned object, the present invention provides a pair of wire connecting portions consisting of a positive electrode and a negative electrode and end portions of a pair of electric wires consisting of a positive electrode and a negative electrode, A pair of terminal members fixed to the electric wire connecting portion with a screw, and defining a concave portion at the end portion of the one electric wire connecting portion, forming a convex portion at the end portion of the other electric wire connecting portion,
A convex portion that engages with the concave portion of the electric wire connecting portion is formed at one end of the terminal member, and a concave portion that engages with the convex portion of the electric wire connecting portion is defined at the end portion of the other terminal member. It is characterized by

According to the present invention, when the terminal member is connected to the electric wire connecting portion, the concave portion of one electric wire connecting portion becomes the convex portion of one terminal member and the concave portion of the other electric wire connecting portion becomes the convex portion of the other terminal member. However, since the concave portion of the electric wire connecting portion and the concave portion of the terminal member and the convex portion of the electric wire connecting portion and the convex portion of the terminal member cannot be engaged with each other, misconnection can be prevented.

Further, according to the present invention, a wall that is bifurcated to form a bent portion at the tip of a convex portion formed on one of the terminal members and to form a concave portion formed on the other terminal member. A bent portion is formed at the tip of the wire, and when the wire connecting portion and the terminal member are engaged with each other, the bent portion formed on the protruding portion of one terminal member is a recess formed on one wire connecting portion. And the bent portion formed on the wall portion forming the concave portion of the other terminal member is fitted with the convex portion formed on the electric wire connecting portion.

Further, in this case, a bent portion is formed at the tip of the convex portion formed on one of the electric wire connecting portions, and a bifurcated portion is formed to form a concave portion formed on the other electric wire connecting portion. When a bent portion is formed at the tip of the wall portion and the wire connecting portion and the terminal member are engaged with each other, the bent portion formed on the convex portion of one wire connecting portion is formed on the one terminal member. It is characterized in that the bent portion which is fitted in the recessed portion and which is formed in the wall portion which constitutes the recessed portion of the other electric wire connecting portion is fitted in the convex portion formed in the terminal member.

According to this structure, the terminal member is connected to the electric wire connecting portion in a restricted rotational direction, which is preferable.

Furthermore, in this case, when the electric wire connecting portion is arranged in a junction box of an electric vehicle,
The possibility of incorrect wiring is reduced, production efficiency is improved, and maintenance management is facilitated.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION A wire connecting structure according to the present invention will be described below in detail with reference to the accompanying drawings, with reference to preferred embodiments.

In FIG. 1, reference numeral 20 indicates an electric wire connection structure according to the present embodiment. This wire connection structure 20
Is a pair of electric wire connecting portions 22a and 22b and a pair of terminal lugs 24 that engage with the electric wire connecting portions 22a and 22b.
a and 24b. The electric wire connecting portion 22a,
22b is made of an elongated metal plate having conductivity, and the metal plate is bent so that the contact portions 26a and 26b and the attachment portion 28 are formed.
a and 28b and circuit connecting portions 30a and 30b are formed.

Holes 32 are formed in the contact portions 26a and 26b.
a, 32b are formed, and the holes 32a, 32b are nuts 34a, 34b fixed to the contact portions 26a, 26b.
It communicates with the screw hole of. A protrusion 36 is formed at the tip of the contact portion 26a of the one wire connection portion 22a, and a recess 38 is formed at the tip of the contact portion 26b of the other wire connection portion 22b. The mounting portions 28a and 28b, the circuit connecting portion 30
a, 30b have holes 40a, 40 for inserting screws.
b, 42a, 42b are defined.

The terminal lugs 24a, 24b engaging with the wire connecting portions 22a, 22b are formed of a conductive metal plate, and one end of each of the terminal lugs 24a, 24b has a cylindrical shape for connecting an electric wire. Caulking portion 44a, 4
4b is formed. A recess 46 is defined at the end of one terminal lug 24a, and the width A ₁ of the recess 46 is formed to be slightly wider than the width A ₂ of the protrusion 36 of the wire connecting portion 22a. The tip of the bifurcated wall of the recess 46 is bent into a curved L shape to form bent portions 48a and 48b. A convex portion 50 is formed at the end of the other terminal lug 24b, and the width B ₁ of the convex portion 50 is formed slightly smaller than the width B ₂ of the concave portion 38 of the wire connecting portion 22b.
The tip of the convex portion 50 is bent in an L shape to form a bent portion 52, and holes 54a and 54b for inserting screws are formed in the central portions of the terminal lugs 24a and 24b.

The electric wire connection structure 20 according to the present invention is basically constructed as described above. Next, the junction box 56 of an electric vehicle using the electric wire connection structure 20 will be described.

This junction box 56 is shown in FIG.
As shown in FIG.
The mounting portions 28a and 28b of a and 22b are the terminal mounting portion 5
It is screwed to 8. The terminals 66a, 6 of the circuit 64 disposed inside the junction box 56 are provided at the circuit connecting portions 30a, 30b of the electric wire connecting portions 22a, 22b.
6b is screwed. The junction box 5
In the lower part of 6, a plate-like member 68 is provided below the electric wire connecting part 22b.
Is fixed.

The end portions of the electric wires 70a and 70b connected to the junction box 56 have their coatings peeled off and are crimped to the crimped portions 44a and 44b of the terminal lugs 24a and 24b, respectively.
0a and 70b are electrically connected. The electric wire 70a,
70b is integrally tightened by a band 72, and the band 72 is fixed to the plate member 68, and as a result,
The electric wires 70a and 70b are fixed to the plate member 68 (arrow C in FIG. 2). Therefore, if the length of the electric wire 70b from the band 72 to the terminal lug 24b is the band 72
The length of the electric wire 70a from the terminal lug 24a to the terminal lug 24a is shorter than the length of the electric wire 70a.
There is no concern about connection with a.

The junction box 56 in which the electric wire connection structure 20 according to the present invention is used is constructed as described above. Next, its operation will be described.

When connecting the terminal lugs 24a, 24b to the wire connecting portions 22a, 22b, first, the wire connecting portion 2
The bent portion 48 of the terminal lug 24a is provided on the convex portion 36 of 2a.
The a and 48b are fitted together, while the bent portion 52 of the terminal lug 24b is fitted into the recess 38 of the wire connecting portion 22b (see FIGS. 3 and 4). The screws 74a, 74b are inserted into the hole portions 54a, 54b of the terminal lugs 24a, 24b, and screwed into the nuts 34a, 34b of the electric wire connecting portions 22a, 22b to connect the terminal lugs 24a, 24b to the electric wire connecting portion 22.
Fasten to a and 22b. At this time, terminal lug 24
The bent portions 48a and 48b of a are the convex portions 3 of the electric wire connecting portion 22a.
6 and the bent portion 52 of the terminal lug 24b is suppressed by the wall portion forming the recess 38 of the wire connection portion 22b, so that the concern that the terminal lugs 24a, 24b rotate can be eliminated, and the wires 70a, 70b. The wiring direction is constant. Further, since the terminal lugs 24a and 24b do not rotate due to vibrations or the like, there is no concern that the screws 74a and 74b will loosen after fastening and contact failure will occur.

If the terminal lug 24b is to be connected to the wire connecting portion 22a, the length of the wire 70b from the band 72 fixed to the plate member 68 is short, and the terminal lug 24b is connected to the wire connecting portion 22a. Can not. Further, even when the electric wire 70b is slackened and the terminal lug 24b reaches the electric wire connecting portion 22a,
The bent portion 52 of the terminal lug 24b is the electric wire connecting portion 22a.
The protrusion 36 comes into contact with the tip of the protrusion 36 and cannot be connected (see FIGS. 5 and 6). Similarly, when trying to connect the terminal lug 24a to the electric wire connecting portion 22b, the terminal lug 24
The bent portions 48a and 48b of a are concave portions 3 of the electric wire connecting portion 22b.
It cannot be connected because it abuts on the tip of the wall forming part 8. Therefore, incorrect connection can be prevented.

In the present embodiment, the tips of the terminal lugs 24a and 24b are bent in an L shape, but as shown in FIG. 7, the tips of the terminal lugs 24a and 24b are not bent, and the electric wires are not bent. The tip of the convex portion 36 of the connecting portion 22a is bent into an L shape to form a bent portion 76, and similarly, the wire connecting portion 22b is formed.
The tip of the concave portion 38 is bent into an L-shape to bend the bent portions 78a, 7a.
8b is formed, and the bent portions 76, 78a, 78b are fitted into the concave portions 46 and the convex portions 50 of the terminal lugs 24a, 24b, respectively, so as to connect the wire connecting portions 22a, 22b and the terminal lugs 24a, 24b. You may comprise.

[0026]

According to the wire connecting structure of the present invention, the following effects and advantages can be obtained.

Since the electric wire connecting portion having the convex portion is fitted only with the terminal lug having the concave portion, and the electric wire connecting portion having the concave portion is fitted only with the terminal lug having the convex portion. Misconnection is easily prevented, and at the same time the terminal lug is prevented from rotating when the terminal lug is fastened, so that the wiring directions of the electric wires can be easily matched to improve the work efficiency. Reliability is improved because there is no looseness of the screws for fastening.

[Brief description of drawings]

FIG. 1 is a perspective view showing an electric wire connection structure according to an embodiment of the present invention.

FIG. 2 is a partial perspective view showing a junction box in which the electric wire connection structure shown in FIG. 1 is used.

FIG. 3 is a perspective view showing a usage state of the electric wire connection structure shown in FIG. 1.

FIG. 4 is a side view showing a use state of the electric wire connection structure shown in FIG.

5 is a perspective view showing a usage state of the electric wire connection structure shown in FIG. 1. FIG.

FIG. 6 is a side view showing a usage state of the electric wire connection structure shown in FIG. 1.

FIG. 7 is a perspective view showing an electric wire connection structure according to another embodiment of the present invention.

FIG. 8 is a perspective view showing a wire connection structure according to a conventional technique.

[Explanation of symbols]

20 ... Electric wire connection structure 22a, 22b ... Electric wire connection part 24a, 24b ... Terminal lug 36, 50 ... Convex part 38, 46 ... Recessed part 48a, 48b, 52, 76, 78a, 78b ... Bent part

Claims (4)

[Claims] 1. A pair of electric wire connecting portions composed of a positive electrode and a negative electrode, and end portions of a pair of electric wires composed of a positive electrode and a negative electrode,
A pair of terminal members fixed to the electric wire connecting portion with a screw, and defining a recessed portion at one end of the electric wire connecting portion,
A convex portion is formed at the end of the other electric wire connecting portion, a convex portion that engages with the concave portion of the electric wire connecting portion is formed at the end portion of the one terminal member, and an end portion of the other terminal member is formed. An electric wire connecting structure, characterized in that a concave portion that engages with a convex portion of the electric wire connecting portion is defined. 2. The electric wire connection structure according to claim 1, wherein a bent portion is formed at a tip of a convex portion formed on one of the terminal members, and a concave portion is formed on the other terminal member. A bent portion is formed at the end of the bifurcated wall portion, and when the wire connecting portion and the terminal member are engaged, the bent portion formed on the convex portion of one of the terminal members is connected to one of the electric wires. An electric wire characterized in that the electric wire is fitted with a concave portion formed in the electric wire connecting portion, and the bent portion formed in the wall portion defining the concave portion of the other terminal member is fitted with the convex portion formed in the electric wire connecting portion. Connection structure. 3. The electric wire connecting structure according to claim 1, wherein a bent portion is formed at a tip of a convex portion formed on one of the electric wire connecting portions, and a concave portion is formed on the other electric wire connecting portion. In order to do so, a bent portion is formed at the tip of the bifurcated wall portion, and when the wire connecting portion and the terminal member are engaged, the bent portion formed on the convex portion of one wire connecting portion is Characterized in that the bent portion formed on the wall portion defining the concave portion of the other electric wire connecting portion is fitted with the convex portion formed on the terminal member. Electric wire connection structure. 4. The electric wire connecting structure according to claim 1, wherein the electric wire connecting portion is arranged in a junction box of an electric vehicle.