JP2736500B2 - Wire connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the connection or branching of a plurality of single-wire electric cables in various buildings such as houses and buildings for indoor wiring, for example, from a distribution board to terminal outlets. The present invention relates to a connector for a single wire used for wiring.

[0002]

2. Description of the Related Art Conventionally, as a connector for connecting a single-wire cable having a relatively thick single wire having a diameter of 1 to 2 mm as a conductor and mainly used for wiring behind a ceiling or in a wall, a one-touch operation of simply inserting a single wire is performed. For example, Japanese Patent Publication No. 2-51 describes the connection between electric wires and cables.
No. 222 has already been proposed.

[0003] This type of electric wire connector includes two electric wires for connecting only two electric wires to three electric wires, four electric wires, five electric wires, and six electric wires.
Numerous types are required, such as for book, for eight or for ten. On the other hand, in this type of electric wire connector, when the electric wire is inserted, the electric wire inserted for conduction is pressed toward the conductive plate, and an external force in the pulling direction is applied to the inserted electric wire. When added, in order to prevent an accidental escape, the structure has a wire pressing claw that cuts into the wire and prevents movement in the removal direction.

[0004] Since the wire pressing claw functions to prevent the wire from slipping out by biting into the inserted wire, a steel plate which is difficult to perform precision processing is used as a material for forming the wire pressing claw. On the other hand, as described above, this kind of electric wire connector is necessary because many types are currently used, from two electric wires to eight electric wires or ten electric wires. Therefore, as a matter of course, at present, steel plates, which are difficult to process, are manufactured by precision processing of metal fittings for each type.

However, the size relationship between the metal fittings and the metal fitting space of the insulating container for housing the metal fittings and the like is such that if the space is small, the metal fittings cannot enter, and if the space is forcibly pushed in, the container cracks. It becomes a defective product, it is difficult to insert it when it is almost full, and it must be press-fitted. Also, even if they are manufactured precisely with each other, a manufacturing error will occur. Therefore, the space for holding the metal fittings of the container must be slightly increased. Therefore, they are usually manufactured in a dimensional relationship such that there is a small margin between them.

[0006] For this reason, generally, since the metal fitting moves within the container by this extra space, the positional relationship between the wire guide hole formed in the container and the wire passage guide hole formed in the metal fitting is slightly different. However, there is a problem in that a positional shift occurs, and a leading end of the wire inserted from the wire guide hole hits a peripheral portion of the wire passage guide hole, which may hinder smooth wire insertion.

[0007]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to surely solve the problems of such a conventional connector by simple means. It is an object of the present invention to provide means that can prevent such a conventional problem from occurring even in a connector for a large number of cables such as eight cables.

[0008]

The structure of the present invention for achieving the object will be described with reference to the reference numerals in the drawings showing the embodiments. The structure of the connector according to the present invention is formed of a synthetic resin material. And a metal fitting provided inside the container body 1, the plurality of wire pressing claws 21.
, A conductive metal plate 3 made of a good conductor, and a synthetic resin lid fitted and fixed to the opening 11 of the container body 1 and a plurality of electric wires for guiding the end of the electric wire. And a lid 4 having guide holes 41.
In the upper side wall 24 where the metal fitting main body 2 is bent and protruded from the upper side of the base wall 22 facing the electric wire pressing claw 21 toward the front side, respective positions corresponding to the electric wire guide holes 41 of the lid 4. by assumed that is formed with a plurality of electric wires passing guide holes 25 ..., the electric wire passing guide holes 25 ... is to be formed into a shape having embossed wire guide portion 25a that protrudes in a funnel shape toward the inner surface side, the wire Are made to smoothly guide the front end of the head.

An electric wire passage guide hole 25 having an electric wire guide portion 25a projecting in a funnel shape of the container body 1 has a diameter of an entrance portion on the upper surface side of the electric wire guide hole 4 formed in the lid 4.
It is needless to say that the tip of the electric wire can be guided more smoothly by making the diameter slightly larger than the inner diameter of the container 1.

[0010]

Since the connector according to the present invention has the above-described configuration, the distal end of the electric wire is guided into the hole by the funnel-shaped guide portion 25a of the electric wire passage guide hole 25 formed in the container body 1. Therefore, even if the size of the internal space of the container body 1 is slightly larger than the overall size of the metal fitting main body 2 and the metal fitting main body 2 moves, the insertion of the electric wire into the container main body 1 can be smoothly performed. Can be changed. Therefore, it is not necessary to make the internal space of the container main body 1 almost exactly match the size of the outer shape of the metal fittings main body 2, and it is possible to make the design slightly larger in advance, and the metal fittings main body 2 is inserted into the internal space of the container main body 1. Can be easily inserted and productivity can be improved.

When using the electric wire connector of the present invention, as in the prior art, the end of the single-wire electric wire from which the insulating coating at the end has been removed by a predetermined length is placed on the lid of the insulating case. It is only necessary to pass through the wire passage guide hole 25 from the wire guide hole 41 formed in the body 4 and insert the wire into the inside of the fitting main body 1. When the electric wire is inserted into the container main body 1, the tip of the electric wire is pressed by the conductive plate 3 by the wire pressing claw 21 having spring elasticity inside the metal fitting main body 1, so that the surface of the conductive plate 3 comes into line contact or surface contact. Then, it is electrically connected to another electric wire inserted into the connector through the conductive plate 3 in the same manner. The wire pressing claw 21 inclined in the direction of insertion of the wire strongly bites into the surface layer of the wire when an external force is applied to the wire in the pull-out direction, and prevents the wire from coming out of the connector.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall exploded view for explaining a manufacturing method, and FIG. 2 is a view for explaining a structure of a manufactured connector. This connector is an embodiment of a connector for electrically connecting four electric wires each having a single core wire to each other. The container body 1 of this embodiment is
It is formed in a rectangular tube shape with a bottom by a transparent insulating resin material such as VC, and has an opening 1 at one end (upper side in the figure).
The opening 11 has front and rear sides formed with horizontally long lid fitting holes 12. The lid 4 is made of an opaque or translucent insulating resin material and has a rectangular column shape with a short vertical thickness, and is formed into a size that fits exactly into the opening 11, and penetrates in the vertical direction and has a tapered lower end portion. The four wire guide holes 41 are formed side by side in the lateral direction, and laterally elongated projections 42, 42 that fit into the lid fitting holes 12, 12 are formed on the side walls in the front-rear direction.

The metal fitting main body 2 housed in the container body 1 is formed by bending a stainless steel thin plate into a U-shape to form an upper side wall 24 and a lower side wall 26, and then using the tip of the upper side wall 24 as a base wall 22. Is bent obliquely downward toward the side, the tip of which is formed on the electric wire pressing claw 21, and the tip of the lower side wall 26 is bent in such a manner that the bent portion 23 faces the base wall 22. The bent portion 23 is formed so as to press the electric wire at the bent portion 23, and the protrusion 14 protrudes from the bottom wall 13 of the container body 1 between the lower wall 26 and the portion forming the bent portion 23. Notch 27 with width approximately equal to the thickness of
And a “funnel-like” is formed on the flat surface of the upper side wall 24.
An electric wire passage guide hole 25 having an electric wire guide portion 25a protruded by burring processing protruding toward the inner surface side is formed side by side, and the unit body 2 of the metal fitting main body 2 having a shape as shown in the figure is formed.
P is formed. That is, the unit body 2P mainly for the metal fitting has two electric wire passing guide holes 25 and two electric wire pressing claws 21.
Is a unit body mainly for metal fittings, which has two bent portions 23 for wire pressure welding.

The conductive plate 3 is made of a copper alloy strip formed to have dimensions substantially the same as the inner surface dimensions of the upper and lower side plates of the metal fitting main body 2 and is formed into a corrugated plate which is sequentially uneven in the length direction. It is obtained by cutting the formed product into predetermined dimensions. That is, as shown in the left side of FIG. 1, the conductive plate 3 of this embodiment is formed in a shape having four concave grooves 3a on one surface.

In order to manufacture the connector for four electric wires shown in this embodiment, first, as shown in FIG. 1 in a disassembled state, two unit bodies 2P and 2P having two electric wire pressing claws are used. 2
P is arranged side by side in the horizontal direction as shown by the arrow A to form the metal fitting main body 2, and one of the two unit bodies 2 P, 2 P arranged in parallel with the four recessed grooves 3 a is formed. As shown by the arrow B, the conductive plate 3 is inserted laterally between the electric wire pressing claws 21 and the base wall 22 facing the electric wire pressing claws 21, and the electric wire pressing claws 21 and the opposing base wall are inserted. 22, the metal fitting main body 2 composed of the two unit bodies and the conductive plate 3 are held in this sandwiched state, and as shown by the arrow C, the opening 11 of the container body 1 is held. Then, as shown by an arrow D, the four wire guide holes 41 are inserted into the inside of the container body 1.
Are press-fitted into the opening 11 of the container body 1, and the horizontally long projections 42 are inserted into the horizontally long lid fitting holes 1 of the container body 1.
2 and fixed.

As shown in FIGS. 2 to 4, the connector manufactured as described above is provided with electric wire pressing claws 21... 2 inside a bottomed rectangular cylindrical main body 1 made of a synthetic resin material. A metal fitting main body 2 composed of two unit bodies 2P, 2P each having one piece, and one conductive plate 3 having four concave grooves 3a.
The conductive plate 3 is connected to the wire pressing claws 21 and the wire pressing claws 21 over the entire width of the two unit bodies 2P, 2P.
The notch 27 sandwiches the projection 14 in the container main body 1 and engages with the projection 14 in a state where the projection 14 is sandwiched between the base wall 22 and the base wall 22 opposed to the base wall 22. It is regulated and housed inside the container body 1.

In order to connect a plurality of (in this case, a maximum of four) electric wires (not shown) using the connector, a bare single-wire electric wire whose coating has been peeled off is formed on the cover 4. It is inserted into the inside from the electric wire guide hole 41, and the front end portion passes through the electric wire passage guide hole 25 of the metal fitting main body 2 and the lower wall 26 on the back side.
Just push it in until it hits. By doing so, the inserted electric wire is pressed against the conductive plate 3 by the electric wire pressing claw 21 and the “curve-shaped” electric wire press-welding bent portion 23 as already described, and the electric wire peripheral surface is formed. The predetermined width comes into surface contact with the surface of the concave groove 3a of the conductive plate 3. Also,
The wire pressing claw 21 receives the retaining action. In this manner, an electric connection is made to the electric wire similarly inserted from the other electric wire guide hole 41 via the conductive plate 3.

FIG. 5 shows three wire guide holes 41 formed in the cover 4 fitted in the container body 1 and a funnel-shaped wire passage guide hole 25 formed in the metal fitting main body 2. Is 3
A three-wire pressing claw 21 and a three-wire press-connecting bent portion 23 for connecting three wires, wherein the container body 1
Has a structure in which two projections 14 are formed. Although illustration is omitted, similarly, for example, for connecting two electric wires,
Similarly, the connector for connecting five wires, connecting six wires, connecting eight wires, etc., also has a funnel-shaped wire passing guide hole 25.
What is necessary is just to guide the electric wire as what has.

The embodiments which are considered to be representative of the present invention have been described above. However, the present invention is not necessarily limited to the structures of these embodiments, but includes the above-mentioned constitutional requirements according to the present invention, and The present invention can be carried out with appropriate modification within the range of achieving the object of the invention and having the following effects. For example, the conductive plate 3 may be a thick plate material with a semicircular cross section or a V-shaped groove formed on the surface thereof, or a flat plate, instead of the corrugated bending plate, or a hot plate at the bottom of the container body 1. The container body 1 may be provided with an electric wire guide hole 41, the bottom may be opened and a cover may be fitted, or the container body 1 and the cover 4 may be connected to each other. Can be arbitrarily modified, such as forming opaque or transparent.

[0020]

As is clear from the above description, the connector of the present invention provides good electrical connection with other wires via a conductive plate only by inserting a bare single wire. It is possible to guide the distal end of the electric wire into the hole by the funnel-shaped ejection guide portion of the electric wire passage guide hole formed in the container main body, so that the container main body is smaller than the overall size of the bracket main body. Even if the inner space is somewhat large and the metal fittings move, the insertion of the electric wire into the container body can be made smooth , and the funnel-shaped
At the same time when the wire guide hole is formed,
Since the peripheral wall of the inner hole is stamped and formed,
No extra steps and no extra material
It is possible to expect a remarkable effect that there is no need .

Therefore, it is not necessary to make the internal space of the container main body almost exactly match the size of the outer shape of the metal fittings, and it is possible to make a slightly large design in advance. The effect of facilitating insertion and improving productivity can be expected.

[Brief description of the drawings]

FIG. 1 is an overall exploded perspective view showing one embodiment of the present invention.

FIG. 2 is an external perspective view of the product of the embodiment.

FIG. 3 is a central longitudinal sectional view passing through the electric wire guide hole.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3;

FIG. 5 is a cross-sectional view of a portion corresponding to FIG. 4 showing another embodiment.

[Explanation of symbols]

 (1) Container body (2) Main body of metal fittings (3) Conductive plate (4) Lid (11) Opening (21) Wire pressing claw (22) Opposing base wall (25) Wire passage guide hole (25a) Wire guide (41) Wire guide hole

 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Hiroyuki Tashita 1-3-5, Tsurumi, Tsurumi-ku, Osaka-shi Nichifu Terminal Industry Co., Ltd. (56) References JP-A-4-284378 (JP, A) Hei 4-131862 (JP, U) Actual opening Hei 2-111063 (JP, U) Actual opening Sho 56-86786 (JP, U) Actual opening Hei 4-40469 (JP, U)

Claims (1)

(57) [Claims] 1. An electric wire connector for inserting a single electric wire from the same direction to make an electrical connection with each other, comprising: a container body (1) having a bottomed rectangular cylindrical shape formed of a synthetic resin material; (1) A metal fitting provided inside of (1), which is composed mainly of a hard metal fitting (2) having a plurality of electric wire pressing claws (21), a conductive plate (3) made of a good conductor, and a container body (1). A) a lid made of a synthetic resin fitted and fixed in the opening (11), and having a plurality of wire guide holes (41) for guiding the tip of the wire. An upper side wall (2) whose main body (2) is bent and projected from the upper side of the base wall (22) facing the electric wire pressing claw (21) toward the front side.
A plurality of wire passage guide holes (25) are provided at respective positions corresponding to the wire guide holes (41) of the lid (4) in 4).
... has, wire connector of the electric wire passing through guide hole (25) ... is formed in a shape having embossed wire guiding portion projecting funnel shape toward the inner surface side (25a).