JP5249608B2 - Wire connector - Google Patents

Description

  The present invention relates to, for example, a connection connector for a fire alarm, and relates to an electric wire connector for use when connecting or branching electric cables by inserting a necessary number of covered electric wires in parallel.

  Conventionally, not only for fire alarms, but also as a wire connector for electrically connecting wire cables with a single wire as a conductor, electrical connection between wire cables can be performed by a one-touch operation by simply inserting the wire. What has been proposed has already been proposed (see, for example, Patent Document 1 and Patent Document 2).

  This type of electric wire connector includes one for connecting only two electric wires to one for connecting a plurality of electric wires such as three or four. In order to prevent the wires from being unexpectedly pulled out, these wire connectors are electrically connected by pressing the inserted wires against the conductive bottom plate when the wires are inserted inside the wire connector. It has a structure having a pressing claw for preventing an electric wire from slipping into the electric wire and preventing the movement in the drawing direction and a pressing claw that presses the electric wire against the current-carrying plate to perform reliable energization.

  9 and 10 are diagrams showing an example of a conventional wire connector. FIG. 9 is a perspective view of a conventional electric wire connector disassembled into parts, and FIG. 10 is a vertical cross-sectional view showing the conventional electric wire connector in a state where electric wires are inserted. The structure of the electric wire connector is a bottomed rectangular tube-shaped synthetic resin container body 1 and a synthetic resin lid fitted and fixed to the opening 11 of the container main body 1. A lid 4 having a plurality of (three in the figure) wire guide holes 41 for guiding, a metal fitting built inside the container body 1, and a bottom plate 23 formed so as to be continuous in the width direction; The current-carrying metal fitting 2 has a front side wall 21 and a rear side wall 22 that are independently separated in the width direction corresponding to each of the plurality of wire guide holes 41. Electric wire passage guide holes 28 and front electric wire pressing claws 25 are formed on each front side wall 21, and rear electric wire pressing claws 26 are formed on each rear side wall 22.

  In order to assemble the wire connector with each of these parts, first, as shown by the arrow A, by inserting the current-carrying metal fitting 2 into the container body 1 from the opening 11 of the container body 1, It is stored in the cavity 15. Next, as shown by the arrow B, the lid body 4 having the three wire guide holes 41 is press-fitted into the opening 11 of the container body 1, and the protrusion 42 is fitted into the lid locking hole 12 of the container body 1. Will be fixed.

In such a wire connector, after the wire w inserted from the wire guide hole 41 passes through the wire passage guide hole 28, the wire w enters while bending the front wire pressing claw 25 and the rear wire pressing claw 26. The front end of w is in contact with the rear side wall 22. The electric wire w after completion of insertion is in press contact with the bottom plate 23 by the front electric wire pressing claw 25 and the rear electric wire pressing claw 26, and the front electric wire pressing claw 25 and the rear side with respect to an external force trying to pull out the electric wire w. The end portion with the wire pressing claw 26 bites into the wire w and prevents the wire w from moving in the drawing direction. In addition, a semi-cylindrical groove 29 for electric wire insertion guide is formed on the bottom plate 23 of the energization fitting 2 from the front electric wire pressing claw 25 toward the rear electric wire pressing claw 26.
JP 2002-184484 A JP 2005-235711 A

  In the conventional electric wire connector according to the above description, when the electric wire w having a relatively thick wire diameter of about 1.5 to 2 mm is used, the electric wire w has a required hardness. After inserting the wire w from 41, the wire passing guide hole 28 is passed, and then the wire w is easily penetrated into the back while the front wire pressing claw 25 and the rear wire pressing claw 26 are bent forward. However, in the case of a thin wire having a thin wire diameter, for example, a wire having a diameter of 0.5 to 1.2 mm, the straightness of the bare wire portion from which the coating has been removed is weak and easily deformed. It was difficult to penetrate into the connector while pushing the pressing claw and bending it forward.

  For this reason, the use of a thin wire such as a signal wire in the present invention for this type of wire insertion type electric wire connector has been avoided because it involves a risk of poor connection. However, there is a high demand for electrically connecting such thin wires targeted by the present invention by a simple method.

  Therefore, the present invention is a wire that can be reliably energized between wires even if it is a thin wire, even if the wire is subjected to a pulling external force, can reliably energize the wires, and can prevent the occurrence of a short-circuit accident etc. An object is to provide a connector. At the same time, the present invention provides an electric wire connector in which it is possible to visually confirm from the outside whether or not the electric wires are inserted into the connector in a state where electrical connection can be reliably performed. For the purpose.

The configuration of the electric wire connector according to the present invention taken to solve this problem is an electric wire connector for which the insulation coated electric wire w is used, and a housing H formed of a resin material having electrical insulation properties and The energizing metal fitting 2 is inserted into the housing H and electrically connects a plurality of electric wires. The housing H includes a hollow portion 15 into which the energizing metal fitting 2 is inserted, and the hollow portion 15. The container main body 1 provided with the continuous opening part 11 and formed in the bottomed rectangular tube shape, the plurality of electric wire insertion holes 41 opened in parallel, and the fitting part 43 to the opening part 11 of the container main body 1 were provided. The energizing metal fitting 2 comprises a bottom plate 23 having a lateral width b corresponding to a plurality of electric wire parallel widths, and upper end sides of the entrance side vertical wall 21 and the back side vertical wall 22 of the bottom plate 23. The shape is such that the open end ends near the bottom plate 23. The two electric wire pressing claws 25, 26 formed corresponding to each of the electric wire insertion holes 41 and the two electric wire pressing claws 25, 26 in the front-rear direction in a plan view, the electric wires The left and right electric wire straight guide pieces 51a and 51b formed in a substantially symmetrical eight-shape are formed along the center line of the insertion hole 41 in the electric wire insertion direction and cut from the bottom plate 23 toward the cavity portion 15 side. A plurality of straight wire guide pieces 51 a and 51 b erected and erected , and the wire w inserted from the wire guide hole 41 is in contact with the front wire pressing claw 25 and being pressed toward the bottom plate 23. The left and right electric wire linearly moving guide pieces 51a and 51b formed on the bottom plate 23 and the left and right side surfaces are brought into contact with each other, and then contacted with the rear electric wire pressing claws 26 to be pressed toward the bottom plate 23. further advances while, and the container main body 1 The energizing metal fitting 2 is formed of a resin material that can be seen through the inside, and the plurality of electric wire passage guide holes 28 formed in the inlet-side vertical wall 21 and the plurality of electric wire tip confirmation holes 52 formed in the inner vertical wall 22. The container body 1 has a structure in which a confirmation cavity c for the wire tip portion that has passed through the confirmation hole 52 is provided on the back side of the wire tip confirmation hole 52.

The electric wire connector according to the present invention directly bears the current-carrying action between the electric wires on the bottom plate of the electric fitting, and each electric wire inserted into the connector through the electric wire insertion hole is connected to the electric plate. In particular, it is structured so that it is pressed by two electric wire pressing claws in the front-rear direction and in close contact, and in particular, located on the bottom plate of the current-carrying metal fitting between the two electric wire pressing claws in the front-rear direction in the plan view. A plurality of straight wire guide pieces that are cut and raised from the bottom plate toward the cavity side are formed in a substantially symmetrical eight-shape in the left and right direction along the wire insertion hole. Each of the electric wires inserted into the connector has a side surface abutting against the linearly moving guide piece of the electric wire so that the electric wire goes straight and facilitates intrusion into the inner back portion. Therefore, even if it is a thin wire such as a signal wire that is used by the present invention, the wire can be simply inserted into the wire connector just like a single wire cable having general rigidity. We were able to expect the effect of being able to achieve the connection between each other.

  Furthermore, the electric wire connector of the present invention is such that the container main body is formed of a resin material that can be seen through the inside, and a current-carrying metal fitting inserted through the inside of the container main body is connected to a hole for confirming the tip of the electric wire on the back vertical wall. The tip of the electric wire inserted into the electric wire connector reaches the tip of the confirmation hole or the inner part without reaching the confirmation hole. Since it can be visually confirmed from the outside of the container body whether it is stopped at the wire insertion hole side here, even if the wire is easy to deform and lacks straight advancement, poor conduction due to insufficient insertion of the wire In addition, there is an advantage that it is possible to surely avoid the occurrence of heat generation and short circuit accidents due to poor energization.

  In particular, the wire connector of the present invention passes through the wire tip confirmation hole formed in the back vertical wall of the current-carrying metal fitting, and the wire tip portion confirmation space formed on the back side. It is possible to quickly and surely check from the outside of the container body formed of a transparent resin material whether or not the tip of the wire is securely inserted into the room, resulting in insufficient insertion of the wire. The occurrence of short circuit accidents due to poor energization and heat generation can be reliably avoided in advance, and the advantage that a highly safe wire connector can be obtained.

  In carrying out the electric wire connector according to the present invention, the material of the current-carrying metal fitting 2 is not limited to a specific material as long as it is a metal material that is highly conductive and can withstand fine processing. From the viewpoint of excellent conductivity, elasticity, strength, bending workability, availability, etc., it is preferable to use a phosphor bronze plate as a material. A beryllium copper plate, a tensile strength copper alloy plate and the like are also preferable materials.

  In addition, as a synthetic resin material suitable for forming the container body 1 and the lid body 4, it is preferable to use a liquid crystal polymer when heat resistance and insulation are required. Examples of the liquid crystal polymer material include VECTRA (registered trademark). In addition, as a material for which heat resistance and insulation are not required, polycarbonate which is excellent in transparency and easy to confirm the insertion state of the electric wire is preferable, and polyimide, PEEK, PEK, etc. are also used as the material. be able to.

  Embodiments of the present invention will be described below together with illustrated examples. 1-8 is a figure which shows the electric wire connector of the main Example of this invention. FIG. 1 is a perspective view showing the electric wire connector of the embodiment in an exploded manner. FIG. 2 is a perspective view showing the external shape of the electric wire connector. FIG. 3 is a longitudinal sectional perspective view of the main part showing an assembled state. 4 is a longitudinal side view of the main part in which the components are disassembled and arranged, FIG. 5 is a transverse plan view of the main part in which the parts are disassembled and arranged, FIG. 6 is a vertical side view of the main part showing the assembled state, and FIG. Is a cross-sectional plan view of the main part showing the assembled state, and FIG.

  As shown in FIGS. 4 and 5, the electric wire connector shown in the embodiment is an electric wire w in which a single thin wire is insulated and coated. Prior to inserting the wire w into the wire connector, the wire end covering is stripped to a required length to form a bare wire, and then inserted toward the wire insertion hole 41 of the lid 4 to be described later.

  In addition, the electric wire connector shown in the embodiment has two left and right electric wire insertion holes 41, 41 shown in FIGS. 1 and 2, and is a connection for electrically connecting the two electric wires to each other. The vessel is shown. The container body 1 shown in this embodiment uses polycarbonate as a transparent resin material and is formed into a bottomed rectangular tube shape. Therefore, although internal perspective is possible, the internal structure is omitted in order to avoid complication of the drawing.

  Thus, the container body 1 is provided with a lid fitting opening 11 at one end (left side in FIG. 1), and the upper surface wall 14 constituting the opening 11 has an oblong upper rectangular shape. The lid locking hole 12 is formed, and the lower wall 17 is formed with a lower lid locking hole 18 having a slightly oblong rectangular shape. Further, as shown in FIG. 1, two shallow arc-shaped grooves 19 are formed on the inner surface side of the lower surface wall 17 of the opening 11. Due to the presence of the groove, the wall portion of the lower lid locking hole 18 formed between the grooves 19 and 19 is temporarily deformed outward when the lid body 4 is fitted. 4 is easily fitted.

  As with the container body 1, the lid 4 may use transparent polycarbonate as a material. However, in the embodiment, the lid 4 is formed of an opaque coloring material. The types of connectors are classified. In other words, even for the same two-wire electric wire connector, the identification performance is improved by color-coding for the different electric wire diameters, and the number of the electric wire insertion holes 41 is confirmed for each electric wire to be used. The colors are made different so that they can be easily identified from the outside without any misuse.

  The lid 4 has a short prismatic shape as compared with the length of the container body 1 in the front-rear direction, and has a flange that is in contact with the front surface of the peripheral wall that forms the opening 11 of the container body 1 on the front surface side. A fitting portion 43 is continuously connected to the opening 11 provided with the portion 46, and the two arc-shaped grooves 19, 19 are in contact with the lower surface side of the fitting portion 43 as shown in FIG. Two arcuate convex portions 47 in contact with each other are formed. In this way, the fitting portion 43 on the back side of the flange portion 46 is shaped to fit exactly into the opening 11 of the container body 1.

  Further, on the upper surface of the fitting portion 43 of the lid body 4, a horizontally long protrusion 42 is formed to be fitted to the upper lid locking hole 12 formed in the upper surface wall 14 of the opening 11 of the container body 1. On the lower surface, a protrusion 45 is formed that fits into the lower lid locking hole 18 formed in the lower surface wall 17 of the opening 11 of the container body 1. By fitting and locking the upper and lower protrusions 42 and 45 into the upper and lower lid locking holes 12 and 18, the lid body 4 is prevented from moving in the pulling direction from the container body 1. More specifically, among these, the protrusion 42 on the upper surface side has an inclined surface in which the front side is a vertical surface and the amount of protrusion decreases toward the rear side in a side view, and the protrusion 45 on the lower surface side is The front side is a vertical surface, and the shape has an inclined surface with a small amount of protrusion toward the rear side.

  The current-carrying metal fitting 2 housed in the internal cavity 15 of the container body 1 is shaped to have a lateral width that allows one electric wire w to be inserted by bending a single phosphor bronze thin plate. The specific shape of the current-carrying metal fitting 2 is such that the front side wall 21 close to the wire insertion hole 41 side and the wire insertion hole 41 side are separated from the front side wall 21 by bending the front and rear sides of the bottom plate 23 around the bottom plate 23 in the side view shape. The rear side wall 22 is formed, the upper end of the front side wall 21 is folded back in a U shape toward the rear side wall 22 and the bottom plate 23, and the lower end edge portion is inclined in the direction of the rear side wall 22. Finally, the front wire pressing claw 25 is formed, and the upper end portion of the rear side wall 22 is once directed in the direction of the front side wall 21, and then folded back again in the U-shape toward the rear side wall 22 and the bottom plate 23. The edge portion is inclined in the direction of the rear side wall 22, and the rear electric wire pressing claw 26 is formed in a shape that ends near the bottom plate 23.

  1 and 5, the current-carrying metal fitting 2 includes a part of the bottom plate 23 in the front-rear direction, and the other part is divided into two in the left-right width direction. More specifically, a part of the front portion of the bottom plate 23, the front side wall 22, its upper end bent portion, and the front electric wire pressing claw 25 are equally divided into two in the left-right direction by the notch portion 27, A part of the rear wall 22, an upper wall portion formed by bending the tip of the rear wall 22, and the rear electric wire pressing claw 26 are equally divided into two in the left-right direction by a notch 27. In this way, the adjacent front wire pressing claws 25, 25 and the adjacent rear wire pressing claws 26, 26 are prevented from interfering with each other with respect to the insertion wire.

  Further, as shown in FIGS. 1 and 5, a substantially rectangular wire passage guide hole 28 is formed at the lower end portion of each front side wall 21, and the electric wire having a substantially rectangular shape is also formed at the lower end portion of each rear side wall 22. A tip confirmation hole 52 is formed. The electric wire w inserted from the electric wire guide hole 41 with respect to the current-carrying metal fitting 2 thus configured passes through the electric wire passage guide hole 28 of the front side wall 21 and comes into contact with the front electric wire pressing claw 25 and is pressed toward the bottom plate 23. Even if it is moved forward and the twisting action of the tip portion is loosened and broken, the left and right electric wire straight guide pieces 51a and 51b formed on the bottom plate 23 and the left and right side surfaces come into contact with each other to receive a convergence action and are in a collective state Is maintained, and then further advances while contacting the rear wire pressing claw 26 and being pressed toward the bottom plate 23. Thus, the front-end | tip part of the electric wire w penetrate | invades even the inner back part.

  At this time, as shown in FIG. 6 and FIG. 7, a confirmation cavity c for the wire tip portion is formed on the back side of the wire tip confirmation hole 52 formed in the rear side wall 22. Therefore, the tip end portion of the electric wire w that has passed through the confirmation hole 52 reaches the inside of the wire tip portion confirmation vacant space c. Thus, in the container body 1 of the present invention, whether or not the distal end portion of the electric wire w reaches the vacant space c for confirming the distal end portion of the electric wire is formed of a resin material that can be seen through internally. Therefore, it can be easily visually confirmed and confirmed from the outside.

  Here, a method for assembling the electric wire connector for energizing the two electric wires shown in the first embodiment will be described with reference to FIG. First, as shown by the arrow A, the current-carrying metal fitting 2 is inserted into the container body 1 from the opening 11 of the container body 1 and is stored in the cavity 15. At this time, the rear side wall 22 of the current-carrying metal fitting 2 comes into contact with the front surface 16 of the rear wall 13 of the container body 1 shown in FIG. 7, and at the same time, the width direction of the bottom plate 23 fits closely with the width direction of the opening 11. It is molded to the size that you want. As a result, the movement prevention and the position regulation of the current-carrying metal fitting 2 are automatically performed.

  Subsequently, as indicated by an arrow B, the lid body 4 having the two wire guide holes 41 is press-fitted into the opening 11 of the container body 1, and the protrusions 42 and 45 protruded from the upper and lower walls thereof are formed on the container body 1. They are fitted and locked in lid locking holes 12 and 18 formed on the upper and lower walls, respectively. By fitting and locking the protrusions 42 and 45 and the locking holes 12 and 18, the lid body 4 is fixed to the container body 1 to obtain the electric wire connector shown in the first embodiment.

  Although the embodiments considered to be representative examples of the present invention have been described above, the electric wire connector of the present invention is not limited to the structures shown in these embodiments, and the other above-described constituent features of the present invention. In addition, the present invention achieves the object referred to in the present invention, and can be implemented with appropriate modifications within a range having the effects described in the present invention.

  The wire connector of the present invention has a structure capable of reliably energizing thin insulated wires that have been feared for uncertain energization performance due to difficulty in straight line insertion. Once offered to the market, it is expected to be used extensively by those skilled in the art.

The perspective view which shows each component of 1st Example. The external appearance perspective view of the whole electric wire connector. The longitudinal cross-sectional perspective view of the principal part which shows an assembly state. The vertical side view of the principal part which disassembled and arrange | positioned each component. The cross-sectional top view of the principal part which disassembled and arrange | positioned each component. The vertical side view of the assembly state which showed the state which inserted the electric wire with the chain line. The cross-sectional top view of the assembly state which showed the state which inserted the electric wire with the chain line. The perspective view which expanded and showed the electricity supply metal fitting. The perspective view which decomposed | disassembled the conventional electric wire connector into each component. The vertical sectional view showing the conventional electric wire connector in the state where the electric wire was inserted.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Container main body 11 Opening part 12 Lid locking hole 13 Back wall 14 Upper surface wall 15 Cavity part 16 Front surface 2 Electrical supply metal fitting 21 Front side wall 22 Rear side wall 23 Bottom plate 25 Front side electric wire press nail 26 Rear side electric wire press nail 27 Notch part 28 Electric wire Passing guide hole 4 Lid 41 Electric wire insertion hole 42 Protrusion 43 Fitting portion 51 Protruding portion 52 Tip confirmation hole H Housing c Empty space w Electric wire

Claims (1)

A wire connector intended for use with an insulation-coated wire (w),
A housing (H) molded from a resin material with electrical insulation,
It is inserted into the housing (H) and comprises a current-carrying metal fitting (2) for electrically connecting a plurality of electric wires,
The housing (H)
A container body (1) having a hollow part (15) for inserting the current-carrying metal fitting (2), an opening part (11) connected to the hollow part (15), and having a bottomed rectangular tube shape,
A plurality of wire insertion holes (41) opened in parallel and a lid (4) provided with a fitting portion (43) to the opening (11) of the container body (1),
The energizing metal fitting (2)
A bottom plate (23) having a horizontal width (b) corresponding to a plurality of electric wire parallel widths;
The bottom plate (23) is folded from the upper end side of the entrance-side vertical wall (21) and the back-side vertical wall (22), and the open end thereof is shaped close to the bottom plate (23), the wire insertion hole Two wire pressing claws (25, 26) in the front-rear direction formed corresponding to each of (41),
In plan view, it is located between the two wire pressing claws (25, 26) in the front-rear direction, along the wire insertion direction center line of the wire insertion hole (41), and is substantially symmetrical and narrow. The left and right electric wire straight guide pieces (51a, 51b) formed in a letter shape are cut and raised from the bottom plate (23) toward the cavity (15) side, and a plurality of electric wire straight guide pieces (51 a, 51b )
The electric wire (w) inserted from the electric wire guide hole (41) advances while being pressed toward the bottom plate (23) in contact with the front electric wire pressing claw (25), and left and right formed on the bottom plate (23). The wire linearly moving guide piece (51a, 51b) and the left and right side surfaces are in contact with each other and then moved forward while contacting the rear wire pressing claw (26) and being pressed toward the bottom plate (23),
In addition, the container body (1) is formed of a resin material that can be seen through, and the current-carrying metal fitting (2) includes a plurality of wire passage guide holes (28) formed in the inlet-side vertical wall (21) and the rear-side vertical Provided with a plurality of wire tip confirmation holes (52) formed in the wall (22), the container body (1) passes through the confirmation hole (52) on the back side of the wire tip confirmation hole (52) An electric wire connector having a structure (c) for checking the tip of the electric wire.

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