JP2010205583A - Crimp style terminal and wire with terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crimp style terminal capable of reducing occurrence of corrosion of a conductor wire by suppressing adhesion of moisture to the conductor wire of an electric wire, and a wire with crimp style terminal having such a crimp style terminal. <P>SOLUTION: The crimp style terminal 1 comprises a pair of wire barrels 11, a pair of insulation barrels 13, and a continuous wall 14 formed continued from the pair of wire barrels 11 to the pair of insulation barrels 13. The pair of wire barrels 11 and the pair of continuous walls 14 are formed of a metal material, and the pair of wire barrels 11 have a pair of first contact parts 16 which are mutually in contact accompanied with a bending processing and the pair of continuous walls 14 have a pair of second contact parts 17 which are mutually in contact accompanied with bending processing. A contact layer 20 consisting of a material with a higher degree of adhesion than the metal material at the time of mutual contact is installed respectively on the pair of first contact parts 16 and the pair of second contact part 17. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a crimp terminal that is crimped to an electric wire in which a conductor wire is covered with an insulator, and an electric wire with a terminal including such a crimp terminal.

  2. Description of the Related Art Conventionally, a terminal-attached electric wire is known that includes a plurality of conductor wires covered with an insulator and an electric wire from which the conductor wire is exposed at a terminal and a crimp terminal that is crimped to the terminal (for example, Patent Document 1). As shown in FIG. 6, the crimp terminal 60 of the terminal-attached electric wire is arranged such that the wire barrel 71 to be crimped to the exposed portion of the conductor wire at the end of the electric wire and the wire barrel 71 are spaced apart from each other by a predetermined distance. And an insulation barrel 73 which is crimped to a covering portion covered with an insulator. FIG. 7 shows a state where the wire barrel 71 is crimped to the exposed portion 76 of the electric wire 75 and the insulation barrel 73 is crimped to the covering portion 77 of the electric wire 75, that is, the crimp terminal 60 is crimped to the electric wire 75. An electric wire 70 with a terminal is shown.

Japanese Utility Model Publication No. 5-72053

  As is apparent from FIG. 7, in the terminal-attached electric wire 70, the conductor wire 76 is exposed between the wire barrel 71 and the insulation barrel 73 after the wire barrel 71 and the insulation barrel 73 are crimped. . Therefore, when the conductor wire 76 is made of a material having a strong ionization tendency (particularly aluminum or aluminum alloy), if moisture adheres to the conductor wire 76, the conductor wire 76 is between the metal (for example, copper) constituting the terminal 60. There is a risk of electric corrosion. For example, in an environment where dust containing salt (especially, containing alkali metals of Na and Ca and alkaline earth metals) is likely to adhere to the conductor wire 76, the dust corrodes the conductor wire 76 by absorbing moisture from the surroundings.

  On the other hand, by inserting the terminal 60 of the terminal-attached electric wire 70 into the waterproof connector housing, the conductor wire 76 can be prevented from corroding, but the cost is increased because the connector housing has a waterproof function.

  Therefore, in view of the above circumstances, the present invention includes a crimp terminal capable of suppressing moisture from adhering to the conductor wire of the electric wire and reducing the occurrence of electrolytic corrosion of the conductor wire, and such a crimp terminal. It aims at providing the electric wire with a crimp terminal.

  In order to achieve the above object, a crimp terminal according to the present invention is crimped to an end of an electric wire having a covering portion in which a plurality of conductor wires are covered with an insulator and an exposed portion at which the conductor wires are exposed. A crimping terminal, the bottom wall on which the electric wire is placed, a pair of wire barrels that are bent so as to rise from the bottom wall and be crimped to the exposed portion, and rise from the bottom wall, A pair of insulation barrels that are bent so as to be crimped to the covering portion, and are formed continuously from the pair of wire barrels to the pair of insulation barrels, and the pair of wire barrels and the pair of pairs A pair of continuous walls bent so as to cover a portion between the insulation barrel and the pair of wire barrels and the pair of continuous walls. The pair of wire barrels has a pair of first contact portions that come into contact with each other during the bending process, and the pair of continuous walls contact with each other along the bending process. Each of the pair of first contact portions and the pair of second contact portions is provided with a contact layer made of a material having a higher degree of adhesion when contacting each other than the metal material. .

  The terminal-attached electric wire according to the present invention is an electric wire having a covering portion where a plurality of conductor wires are covered with an insulator, an exposed portion where the conductor wire is exposed at a terminal, and the above-mentioned wire that is crimped to the terminal of the electric wire. In a crimped state in which the crimp terminal is crimped to the end of the electric wire, the pair of wire barrels is configured such that the pair of first contact portions are in contact with each other and the exposed portion of the electric wire is The pair of insulation barrels are crimped to the covering portion of the electric wire, and the pair of continuous walls are connected to the pair of wire barrels in a state where the pair of second contact portions are in contact with each other. The remaining portion of the exposed portion is crimped between the pair of insulation barrels.

  According to the crimp terminal according to the present invention and the electric wire with a terminal having the crimp terminal, the pair of first contact portions and the pair of second contact portions have a degree of adhesion when they are in contact with each other. Since the contact layer made of a higher material is provided, when the crimp terminal is crimped to the electric wire, the pair of first contact portions contact each other, and the pair of second contact portions contact each other, the first contact The degree of adhesion between the parts and the degree of adhesion between the second contact parts are increased. In other words, a gap is formed between one first contact portion and the other first contact portion that are in contact with each other, and between one second contact portion and the other second contact portion that are in contact with each other. Can be suppressed. Thereby, it can suppress that moisture, dust containing moisture, etc. pass between a pair of 1st contact parts and between 2nd contact parts, and adhere to a conductor wire. As a result, it is possible to reduce the electrolytic corrosion of the conductor wire.

  In a preferred embodiment of the present invention, the pair of first contact portions are located on the side opposite to the bottom wall, and comprise a pair of first tip portions that contact each other during the bending process, and the pair of first contact portions. The two contact portions are located on the side opposite to the bottom wall, and include a pair of second tip portions that are in contact with each other during the bending process.

  In another preferred embodiment of the present invention, the contact layer is a resin layer. Since the resin layer is easily elastically deformed, the adhesion obtained when the resin layers are in contact with each other is higher than the adhesion obtained when the metal materials are in contact with each other.

  In still another preferred embodiment of the present invention, the crimp terminal is formed by bending a single metal plate punched into a predetermined shape, and the pair of first contact portions on the metal plate and Resin layers are provided by adhesion or application at portions corresponding to the pair of second contact portions.

  In still another preferred embodiment of the present invention, the conductor wire is made of aluminum or an aluminum alloy. In consideration of the fact that aluminum and aluminum alloys are strongly ionized materials, and that it is easy to galvanize between different metals due to moisture adhesion, when the conductor wire is made of aluminum or aluminum alloy, the terminal-equipped electric wire according to the present invention The crimp terminal is effective for suppressing the electrolytic corrosion of the aluminum electric wire.

  According to the crimp terminal and the electric wire with the crimp terminal according to the present invention, it is possible to suppress the occurrence of electrolytic corrosion on the conductor wire.

It is a perspective view of the electric wire with a terminal concerning the embodiment of the present invention. It is a perspective view which shows the crimp terminal before crimping to the terminal of an electric wire. It is the top view which looked at the crimp terminal before the crimp terminal was bent from the inner surface side. It is the top view which looked at the crimp terminal before a crimp terminal is bent from the outer surface side. It is sectional drawing cut | disconnected along the VI-VI line of FIG. 1, and has shown the state by which a pair of wire barrel was crimped | bonded to the exposed part of the electric wire. It is a perspective view which shows the conventional crimp terminal. It is a perspective view which shows the conventional electric wire with a terminal manufactured by crimping | bonding the crimp terminal of FIG. 7 to the electric wire.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view of a terminal-attached electric wire according to an embodiment of the present invention. The terminal-attached electric wire 30 includes an electric wire 2 and a crimp terminal 1 crimped to the electric wire 2. The electric wire 2 has a plurality of conductor wires 4 arranged in the form of stranded wires, and an insulation coating 3 that covers the conductor wires 4 with an insulator, and the insulation coating 3 is partially removed at the terminal. Thus, the conductor wire 4 is exposed. The crimp terminal 1 is crimped to the terminal. The conductor wire 4 is made of, for example, aluminum or an aluminum alloy. The crimp terminal 1 is made of a metal such as brass or phosphor bronze and has a thickness of about 0.2 mm.

  FIG. 2 is a perspective view showing the crimp terminal 1 before being crimped to the end of the electric wire 2. The crimp terminal 1 has an electrical contact portion 7 and a wire crimp portion 9 at the front and rear. In this embodiment, the electrical contact portion 7 is a female type and is formed in a box shape into which a male terminal (not shown) can be fitted. The electric wire crimping portion 9 includes a bottom wall 10 extending from the electrical contact portion 7 in the longitudinal direction of the crimp terminal 1, a pair of wire barrels 11 rising from the bottom wall 10, and the opposite side of the electrical contact portion 7 across the wire barrel 11. And a pair of insulation barrels 13 rising from the bottom wall 10 at a predetermined distance from the wire barrel 11 and a pair of wire barrels 11 to the pair of insulation barrels 13 are integrally formed continuously. And a continuous wall 14 connecting the pair of wire barrels 11 and the pair of insulation barrels 13. The wire barrel 11, the insulation barrel 13, and the continuous wall 14 have a U-shaped front shape.

  The crimp terminal 1 has an inner surface 18 that comes into contact with the electric wire 2 in a state of being crimped to the electric wire 2 and an outer surface 19 that does not come into contact with the electric wire 2. The crimp terminal 1 is formed into a shape shown in FIG. 2 by punching one metal plate into a predetermined shape shown in FIGS. 3 and 4 and bending it. 3 and 4 are both plan views showing a state before the crimp terminal 1 is bent. In particular, FIG. 3 is a plan view of the crimp terminal 1 viewed from the inner surface 18 side. 4 is a plan view of the crimp terminal 1 as viewed from the outer surface 19 side.

  As shown in FIGS. 2 to 4, each of the pair of wire barrels 11 has a distal end portion (hereinafter referred to as a first distal end portion) 16 located on the opposite side to the bottom wall 10. The first tip portion 16 is formed in parallel to the longitudinal direction of the crimp terminal 1 (that is, the direction in which the bottom wall 10 extends) and in parallel to each other. Each of the pair of insulation barrels 13 also has a tip portion 15 located on the side opposite to the bottom wall 10. The tip portion 15 is formed in parallel to the longitudinal direction of the crimp terminal 1 and in parallel to each other.

  A pair of continuous walls 14 formed continuously from the pair of wire barrels 11 to the pair of insulation barrels 13 connect a pair of distal ends 15 connecting the distal end portion 15 of the insulation barrel 13 and the first distal end portion 16 of the wire barrel 11. Part (hereinafter referred to as second tip part) 17. Since the wire barrel 11 and the insulation barrel 13 have different heights when viewed from the bottom wall 10, the second tip portion 17 has a linear shape extending obliquely in FIGS. 2 to 4.

  A thin film layer (contact layer) 20 is provided on appropriate portions of the pair of wire barrels 11 and the pair of continuous walls 14 on the outer surface 19 of the crimp terminal 1. Specifically, the thin film layer 20 is provided in a portion that contacts each other at the time of press-bonding, which will be described later. In the present embodiment, as shown in FIG. 4, each first tip of the pair of wire barrels 11. It is provided from the portion 16 and its vicinity to each second tip 17 of the pair of continuous walls 14 and its vicinity.

  The thin film layer 20 is made of a material that is easily elastically deformed so that the adhesion obtained when contacting each other is higher than the adhesion between the metal materials that are the base material of the crimp terminal 1. Specifically, the thin film layer 20 consists of a resin layer. This resin layer can be formed by bonding a film made of, for example, PET, FEP, nylon, or polypropylene to the surfaces of the wire barrel 11 and the continuous wall 14 or applying the material. Although the thickness of the thin film layer 20 can be set as appropriate, it is generally preferably about 12 μm. Since the resin layer has the property of being easily elastically deformed, the adhesion obtained when the thin film layers 20 are in contact with each other is more than the adhesion obtained when the metal materials of the crimp terminal 1 are in contact with each other. high.

  The thin film layers 20 come into contact with each other when the crimp terminal 1 is crimped. In a state where the crimp terminal 1 shown in FIG. 2 is crimped to the electric wire 2 using a predetermined mold, the pair of wire barrels 11 are exposed portions where the conductor wire 4 is exposed at the end of the electric wire 2 as shown in FIG. It is crimped | bonded to a part of said exposed part so that a part of may be held. Further, the pair of insulation barrels 13 are pressure-bonded to the insulating coating 3 so as to embrace the insulating coating (coating portion) 3 immediately behind the exposed portion of the electric wire 2. Further, the pair of continuous walls 14 covers the remaining portion of the exposed portion of the electric wire 2 between the pair of wire barrels 11 and the pair of insulation barrels 13, that is, the portion where the wire barrel 11 in the exposed portion is not crimped. So that it is crimped.

  Since the pair of wire barrels 11 is plastically deformed so as to embrace the conductor wire 4 in a state where the pair of wire barrels 11 is crimped to the exposed portion, the pair of first tip portions 16 are formed of stranded wires as shown in FIG. It bites into the conductor wire 4. In this bite-in state, the outer surface 19 of one first tip portion 16 and the outer surface 19 of the other first tip portion 16 are in contact with each other. Since the thin film layer 20 is provided on each outer surface 19 of the pair of first tip portions 16, one first tip portion 16 and the other first tip portion 16 are actually interposed via the thin film layer 20. They are in contact with each other. Therefore, the degree of adhesion between one first tip portion 16 and the other first tip portion 16 is compared with a configuration in which the metals that are the base materials of the pair of first tip portions 16 are in direct contact with each other. Get higher.

  Although illustration is omitted, the pair of second tip portions 17 of the pair of continuous walls 14 is also in a state where the continuous wall 14 is pressure-bonded to the exposed portion of the electric wire 2, similarly to the pair of first tip portions 16. The resin layers 20 are in contact with each other, and the adhesion between the pair of second tip portions 17 is also enhanced by the resin layer 20.

  In the present embodiment described above, the pair of continuous walls 14 of the crimp terminal 1 are connected between the pair of wire barrels 11 and the pair of insulation barrels 13 in a crimped state where the crimp terminal 1 is crimped to the wire 2. 2 conductor wires 4 are covered. Therefore, even if the electric wire 30 with a terminal is used in an environment having a lot of dust, for example, the pair of continuous walls 14 can suppress the dust from adhering to the conductor wire 4. As a result, the electric wire 30 with a terminal is formed of the conductor wire 4 due to moisture absorption of attached dust as compared with a conventional electric wire with a terminal where the conductor wire is exposed between the pair of wire barrels and the pair of insulation barrels. Electric corrosion can be suppressed.

  Further, in the state where the crimp terminal 1 is crimped to the electric wire 2, the closeness between the pair of first tip portions 16 of the pair of wire barrels 11 and the close contact between the pair of second tip portions 17 of the pair of continuous walls 14. The degree is increased by the thin film layer 20. In other words, there is a gap between one first contact portion 16 and the other first contact portion 16 that are in contact with each other, and between one second contact portion 17 and the other second contact portion 17 that are in contact with each other. It can suppress forming. Thereby, it is possible to more effectively suppress moisture, dust containing moisture, and the like from passing through between the pair of first contact portions 16 and between the second contact portions 17 and adhering to the conductor wire 4. As a result, electrolytic corrosion of the conductor wire 4 can be further suppressed.

  Furthermore, considering that aluminum is a material that easily generates galvanic corrosion due to condensation, when the conductor wire 4 is made of aluminum or an aluminum alloy, the crimp terminal 1 of the present embodiment suppresses galvanic corrosion of the aluminum electric wire. It is effective to do.

  In the above-described embodiment, the thin film layer 20 has been described with respect to the configuration in which the thin film layer 20 is provided in the first tip portion 16 and the vicinity thereof, and the second tip portion 17 and the vicinity thereof. You may provide also in a pair of front-end | tip part 15 of the modulation barrel 13, and its vicinity part.

DESCRIPTION OF SYMBOLS 1 Crimp terminal 2 Electric wire 3 Insulation coating 4 Conductor wire 7 Electrical contact part 9 Electrical wire crimp part 10 Bottom wall 11 Wire barrel 13 Insulation barrel 14 Continuous wall 16 1st front-end | tip part 17 2nd front-end | tip part 18 Inner surface 19 Outer surface 20 Thin film layer ( Contact layer)

Claims (6)

A crimping terminal to be crimped to the terminal of the electric wire having a covering portion where a plurality of conductor wires are coated with an insulator and an exposed portion where the conductor wire is exposed at the terminal;
A bottom wall on which the electric wire is placed;
A pair of wire barrels that are bent so as to rise from the bottom wall and be crimped to the exposed portion;
A pair of insulation barrels that are bent so as to rise from the bottom wall and be crimped to the covering portion;
A pair of continuous walls formed continuously from the pair of wire barrels to the pair of insulation barrels and bent so as to cover a portion between the pair of wire barrels and the pair of insulation barrels. When,
With
The pair of wire barrels and the pair of continuous walls are made of a metal material,
The pair of wire barrels has a pair of first contact portions that come into contact with each other along the bending process,
The pair of continuous walls have a pair of second contact portions that come into contact with each other along the bending process,
Each of the pair of first contact portions and the pair of second contact portions is a crimp terminal provided with a contact layer made of a material having a higher degree of adhesion when contacting each other than the metal material. 2. The crimp terminal according to claim 1, wherein the pair of first contact portions is located on a side opposite to the bottom wall and includes a pair of first tip portions that are in contact with each other during the bending process,
The pair of second contact portions are located on the side opposite to the bottom wall, and are crimp terminals including a pair of second tip portions that are in contact with each other during the bending process.   The crimp terminal according to claim 1 or 2, wherein the contact layer is a resin layer. An electric wire having a covering portion where a plurality of conductor wires are covered with an insulator, and an exposed portion where the conductor wires are exposed at a terminal;
The crimp terminal according to any one of claims 1 to 3, which is crimped to the terminal of the electric wire,
With
In the crimped state in which the crimp terminal is crimped to the end of the electric wire, the pair of wire barrels are crimped to a part of the exposed portion of the electric wire with the pair of first contact portions in contact with each other. The insulation barrel is crimped to the covering portion of the electric wire, and the pair of continuous walls are formed between the pair of wire barrels and the pair of insulation barrels in a state where the pair of second contact portions are in contact with each other. An electric wire with a terminal that is crimped to the remaining portion of the exposed portion. The electric wire with a terminal according to claim 4, wherein the crimp terminal is formed by bending a single metal plate punched into a predetermined shape,
The electric wire with a terminal by which the resin layer is provided in the part corresponding to the pair of 1st contact parts and the pair of 2nd contact parts in the metal plate by adhesion or application.   The electric wire with a terminal according to claim 4, wherein the conductor wire is made of aluminum or an aluminum alloy.

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