JPH074775Y2 - Connector for single wire connection - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention has several conductors, each of which is a single wire, as an internal insulator for indoor wiring from a distribution board to a terminal outlet, etc., inside various buildings such as houses and buildings. The present invention relates to a connector for single wire connection for connecting or branching cables which are covered and generally covered with an outer protective layer, when the cables are used.

[0002]

2. Description of the Related Art Conventionally, in the case of connecting an electric wire or cable using a stranded wire, which is a thin annealed copper wire with a diameter of 1/10 to 1/100 mm inside and outside, as a conductor, the conductors at the exposed ends are connected to each other. A method is employed in which they are twisted and inserted into a conductive sleeve covered with an insulating cylinder, and the sleeve is crimped onto the conductor end portion from above the cylinder. In that case, the insulation coating of the crimping portion can be realized simultaneously by only performing the crimping operation, which is convenient for the wiring work of the stranded cable.

Therefore, in the conventional connection or wiring method of this type, there is no problem in connecting the stranded cables to each other in a portion near the electrical equipment after the connector on the wall, that is, in a wiring portion having a small load. However, in the high-load trunk line part such as in the ceiling, a cable with a relatively thick single wire with a diameter of 1 to several mm is used,
There is a problem in that it is impossible to press the insulating cylindrical body made of plastic or the like so strongly that the aligned single wires can be sufficiently pressed against each other without breaking the cylindrical body.
Further, in such a conventional method, therefore, the vinyl tape has to be wound many times over the metal sleeve fitted and crimped onto the aligned two or several single-wire type cable end conductors. However, it is not always easy to perform this work completely for each connecting portion close to each other in a place where the lighting is narrow and the lighting is insufficient. Moreover, there was a risk that the tape-wrapping sleeves would be left messed up and bitten by the mouse, or that the tape-wrapping would be incomplete. .

Therefore, a connector capable of connecting electric wires or cables by a one-touch operation of only inserting a single wire has already been proposed as disclosed in Japanese Utility Model Laid-Open No. 51-130485. This type of connector has a structure in which the receiving blade, that is, the contact part, bites into only one point on the surface of each single wire, so the wire locking function is not sufficient, and the electrical connection is point contact, which causes heat generation due to poor contact. There was a problem that it was not suitable for passing a large current. In addition, a two-point and three-point contact type consisting of a receiving blade and a pressing piece has been proposed as seen in Japanese Utility Model Publication No. 3-13974, but in this case, the wire locking action is strong, It has been pointed out that there is a problem that it is impossible to remove the inserted electric wire from the connector, and it is inconvenient when repairing a wiring mistake or changing the wiring.

[0005]

SUMMARY OF THE INVENTION In order to solve the problems of the conventional connecting method or the connector for connecting a single wire, the present invention only inserts a bare single wire core wire. Secure connection and reliable electrical connection at the same time, and if necessary, a special external force can be applied to eliminate the wire connection, but in normal conditions there is a risk of unexpected wire disconnection. It is intended to provide a single-wire connection connector having no structure.

[0006]

The outline of the constitution of the present invention for achieving the above object will be described with reference to the reference numerals in the drawings. The single wire connecting connector of the present invention has an end of the single wire core wire (S). A contact part (11) for contacting the core part and locking the core wire (S) is formed in the conductive metal fitting body (10), and a plurality of the metal fitting bodies (1
0) is a connector housed in the housing of the insulating case (20), respectively, the contact portion (11),
At least one curved strip plate spring (6a), (6b) that is biased by its own elasticity toward the top plate (18) of the metal fitting body (10), and similarly the top end of the top plate (18). A rotary blade (7) biased toward the elastic means (8) toward the springs (6a), (6b) and the rotary blade (7) and the top plate.
The action part between (18) is in line with the wire insertion holes (23a), (23b) opened on the side surface of the insulating case (20), and the springs (6a), (6b) are The base is the metal fitting body (10)
Fixed to, the portion extending from the base to the tip side along the wire insertion direction and toward the top plate (18),
After passing through the curved apex, it is shaped to reach the tip by inclining in the opposite direction, while on the other hand, between the pivotal base of the rotary blade (7) and the tip, there is a cutting edge that cuts into a bare wire. Projection (9)
Is formed on the surface of the top plate, and the operation tool for forcibly displacing the protrusion (9) in the direction away from the top plate by pivoting the rotary blade (7) against the elastic means. (30) has a structure in which the insulating case (20) is arranged so as to be operable from outside. The top plate (18) may be integral with or separate from the metal fitting body (10), or may be fixed or simply placed after the separate body is formed.

The number of the metal fitting body (10) having the above-mentioned contact portions (11), (11) per connector is not limited to three shown in the following embodiments, but two or more may be used as required. Of course, it may be four or more. Further, the number of strip plate springs per metal fitting body may be two as an example, and a rotary blade may be interposed in the middle, but the number of springs may be only one or three. It may be. The metal fitting body is made of metal such as brass having good conductivity and appropriate strength. The insulating case and the lid are formed by molding an appropriate synthetic resin having high durability and high insulation resistance.

The shape of the metal fitting body (10) including the top plate (18) is
As an example, an I-shaped steel (I-beam) having recesses on both side surfaces is preferable. In that case, the base of the strip-shaped spring is fixed to the bottom of the I-shape and the elasticity is The base of the means, for example a coil spring, can be supported. A pin or the like for pivotally supporting the rotary blade (7) can be attached to the I-shaped vertical beam.

[0009]

The connector of the present invention has such a structure, and therefore, in manufacturing, the metal fitting body having the spring and the elastic means is housed in the compartment of the insulating case and the lid is attached. The operation tool may be attached from the outside of the case by a method such as elastic click fitting or screwing.

In using the connector of the present invention, the end portion of the single-line electric wire whose insulating coating has been removed is inserted from the electric wire insertion hole of the insulating case, and the tip end strikes the inner wall of the compartment. Just take it. This allows
The electric wire is pushed inward between the curved action portion of the strip-shaped spring and the top plate of the metal fitting body against the elastic force of the spring, and at the same time, the electric wire causes the rotary blade to have its cutting edge shape. The protrusion is pivoted against the elastic means through the protrusion, and the protrusion is in a state of half-cutting into the surface layer of the electric wire.

If it is necessary to repair the wrong connection or change the wiring, the operating tool is displaced from outside the insulating case by operating it with a fingertip or the like to force the rotary blade against the elastic means. Turn it a little. As a result, the biting state of the rotary blade is eliminated, so that the electric wire can be pulled out from the connector while temporarily holding the displacement state of the operating tool. At that time, the strip-shaped spring contacting the bare end of the wire at the curved top does not resist pulling out of the wire end. That is, the spring merely presses the end portion of the wire against the top plate of the metal fitting body to ensure the electrical contact between the wire and the metal fitting body.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. This connector has a single core wire (S) covered with an internal insulator (N) and an entire outer protective layer (not shown).
To make a connection between each wire end (D) of the cable covered with (hereinafter referred to as D1 on the power supply side and D2 on the load side) and the corresponding wire end of another similar cable. Connector. This example is for 3-wire connection, but for 2-wire connection, 4
It goes without saying that it can be used for line connection, 6-line connection, 8-line connection, and so on. In any case, there is no need to change the shape or structure of the metal fitting body, and it is sufficient to simply increase or decrease the number of compartments of the insulating case or to use it partly.

An insulating case (20) made of an insulating material such as polystyrene resin shown in FIGS. 1 and 2 has front and rear walls (21a), (2).
1b), left and right walls (22a), (22b), intermediate partition walls (24), (24), and a bottom plate (26) that are parallel to each other and have three compartments (25), (which are insulated from each other). 25) and (25) are formed. The lid (27) attached to the case by the screw (28) has a through hole (29b) aligned with a long through hole (29a) vertically penetrating the partition wall (24). , This can be used not only as an air vent for cooling, but also as a hole for passing a screw for fixing the connector to a beam or the like.

The integrally formed metal fitting body (10) is composed of a top plate (18), a partial bottom plate (16) and a vertical beam (17) and has an I-shaped cross section having concave portions on both side surfaces. Contact portions (11) are provided in the respective recesses. This contact part
Wire insertion holes (23
Strip plate springs (6) are provided on both ends facing a) and (23b).
This is a structure in which a) and (6b) are arranged, and a rotary blade (7) is rotatably attached by a pivot shaft (5) located in the middle. When inserting the power supply side wire from the right side of the figure, the load side wire is inserted from the left side, so the wire insertion holes (23a), (23b)
Is provided in the position facing the streak, and the strip spring (6a),
The directions of (6b) and the rotary blade (7) are also reversed between the front side and the rear side.

The action part between these springs (6a), (6b) and the top plate (18) and the action part between the rotary blade (7) and the top plate (18) are the insulating case (20). ) Wire insertion holes (23a), (23b)
And make a line. The bases of springs (6a) and (6b) are
The part fixed to the bottom plate (16) existing only at both ends of the metal fitting body (10) and extending from the base to the tip side is inclined along the wire insertion direction and toward the top plate (18). After passing through the curved top portion (12), it is inclined in the opposite direction and reaches the tip.

On the other hand, at the base part, the vertical beam (1
The rotary blade (7) pivotally supported by 7) is pressed toward the top plate by the elastic means (8) at the tip side thereof. A blade-like protrusion (9) that bites into a bare wire is formed on the surface of the top plate side between the base and the elastic means. In this example, the elastic means (8) is a coil spring, one end of which is fitted into the recess of the lower surface of the rotary blade (7) and the other end of which is fitted into the recess of the receiving piece (4) corresponding to the recess. There is. The receiving piece (4) is integrally formed with the lower end of the vertical beam (17) or fixed to the lower end.

An operating tool (30) for forcibly displacing the projection (9) in a direction away from the top plate by pivoting the rotary blade (7) against the elastic means (8) is an insulating case. (20) It is arranged so that it can be operated from the outside. This operation tool (30)
In the case of this example, the inner end portion (30a) having a diameter slightly larger than the small hole (31) formed in the case bottom plate (26) is forcibly fitted into the small hole, and there is a risk of falling off due to its own weight. In addition, when the upward operation is performed, the bolt head-shaped outer end portion (30b) may be strongly pressed. As a result, the inner end portion (30a) of the operating tool has a rotary blade located on the side opposite to the elastic means (8) with the pin (5) interposed.
The end of (7) is pushed up against the means.

The method of using the connector of the present invention and the operation of each part are as described above. That is, as shown by an arrow Y in FIG. 1, a bare single wire is inserted from the front side or the rear side of the case main body, and the tip thereof is close to the inner wall of the compartment of the metal fitting main body.
Alternatively, it may be pushed until it hits against the back wall, whereby the lower surface of the single wire (S) is pressed by the curved tops (12) of the strip springs (6a), (6b) as shown in FIG. The top surface is in a line contact with the top plate (18) over the entire length. Then, the blade-like protrusion (9) of the rotary blade (7) bites slightly into the surface layer of the single wire (S), but due to the rotation locus around the pin (5), the external force in the pulling direction on the single wire However, even if a slight amount of outward displacement occurs, the protrusion (9) has to dig deeper, which is impossible due to the hardness of the wire, and therefore the wire is prevented from being pulled out. .

However, if it is necessary to pull out as described above, the operating tool (30) may be pushed up as indicated by arrow U as shown in FIG. Thereby, the elastic means (8) located on the side opposite to the inner end of the operation tool with respect to the pin (5), that is, the coil spring is compressed and the rotary blade rotates in the opposite direction as indicated by the arrow R, and the rotary blade is rotated. The cutting edge of (7) will be separated from the single wire. On the other hand, since the curved tops (12) of the springs (6a), (6b) do not bite into the single wire but merely make sliding contact, the single wire (S) can be pulled out as indicated by arrow T in this state. .

As shown in FIGS. 2 and 3, the electric wire on the power supply side (D1) and the electric wire on the load side (D2) are housed in a distributed state on both sides of the metal fitting body. Two are provided in each of (25).

In the second embodiment shown in FIG. 5, there is only one strip-shaped spring (6a), but since the rotary blade (7) also has an electric wire pressing action, it has the above-mentioned functional aspect. Similar to the first embodiment, rather the simplicity of the configuration is an advantage. The third embodiment of FIG. 6 is different in that the operating tool (30) is inserted into the elastic means, that is, the coil spring (8) and is screwed into the lower surface of the tip of the rotary blade (7). Pull down the operation tool. However, in terms of functionality, there is essentially no change, and the feature is that accidental dropping of the operating tool is prevented. In the fourth and fifth embodiments shown in FIGS. 7 and 8, the number of metal fitting bodies is changed for two lines to four lines, but all other points are the same as in the first to third embodiments.

Although the embodiments considered to be representative of the present invention have been described above, the present invention is not necessarily limited to the structures of these embodiments, and is provided with the above-mentioned constitutional requirements referred to in the present invention. The invention can be carried out by appropriately modifying it within a range that achieves the object of the invention and has the following effects.

[0023]

As is apparent from the above description, according to the present invention, by simply inserting a bare solid wire, a good electrical connection is developed between the solid wire body and the solid wire of another cable. Not only is the insertion posture securely held by the retaining action of the rotary blade, but if it is necessary to release the wire connection, a special operation will forcefully eliminate the bite of the rotary blade to allow the bare single wire to be simplified. Since it can be pulled out, it provides a connector that operates reliably and is convenient to use. Therefore, it greatly contributes to the improvement of the efficiency of the wiring work in the above-mentioned narrow ceiling and the like.

Further, the connector according to the present invention has a simple structure in which the required number of metal fitting bodies are housed in the compartment in the insulating case, so that the connector can be manufactured easily and at low cost.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of the present invention.

FIG. 2 is a sectional view showing a state in use along the line II-II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a cross-sectional view showing another state in use corresponding to FIG.

FIG. 5 is a sectional view showing a second embodiment corresponding to FIG.

FIG. 6 is a sectional view showing a third embodiment corresponding to FIG. 4;

FIG. 7 is a front view showing a fourth embodiment corresponding to FIG.

FIG. 8 is a front view showing a fifth embodiment corresponding to FIG.

[Explanation of symbols]

 (6a) Strip spring (6b) Strip spring (7) Rotating blade (8) Resilient means (9) Cutting edge protrusion (10) Metal fitting body (11) Contact portion (18) Top plate (20) Insulation case (30) Operation tool (S) Single wire core wire

Claims (1)

[Scope of utility model registration request] 1. A core wire (S) which is in contact with an end of a single core wire (S).
In a connector in which a contact part (11) for locking is formed on a conductive metal fitting body (10), and a plurality of the metal fitting bodies (10) are respectively housed inside the housing chamber of the insulating case (20), Contact part (11) of the bracket body (10) top plate (1
At least one curved strip-shaped spring (6a), (6b) that is urged by its own elasticity toward 8), and also its tip end toward the top plate (18) by elastic means (8). The rotating blade (7) being biased, the spring (6a), (6b) and the action portion between the rotating blade (7) and the top plate (18), the insulating case (20 ) Side wire insertion hole (2
3a), (23b) and the spring (6
In a) and (6b), the base is fixed to the metal fitting body (10), and the part extending from the base to the tip side is curved along the wire insertion direction and toward the top plate (18), and is curved. It has a shape that passes through the top and then slopes in the opposite direction to the tip, while
Between the pivotal base of the rotary blade (7) and the tip, a blade-like projection (9) that bites into a bare wire is formed on the surface of the top plate, which resists the elastic means. Then, an operating tool (30) for forcibly displacing the protrusion (9) in a direction away from the top plate by pivotally rotating the rotary blade (7) is arranged so that it can be operated from outside the insulating case (20). A single wire connection connector that is installed.