JP2023056645A - Electric wire with terminal - Google Patents

Abstract

To provide an electric wire with a terminal, in which an anti-corrosion material is suppressed from adhering to a bottom surface of a terminal.SOLUTION: An electric wire 1 with a terminal includes an electric wire 11 having a core wire 12 and a coating part 13 covering the core wire 12, a terminal 2 connected to the electric wire 11, and an anti-corrosion part 3 covering a connection part between the electric wire 11 and the terminal 2 while the terminal 2 is connected to the electric wire 11. The terminal 2 includes a placing part 23 on which the electric wire 11 is placed, a pair of core wire crimping pieces 24A, 24A formed extending from the placing part 23 to crimp the core wire 12, and a pair of coated crimping pieces 25A, 25A formed extending from the placing part 23 to crimp the coating part 13. A guide part 4 for leading and guiding an anti-corrosion material 3 in a liquid state to the rear X2 is provided on the outer peripheral surface of the pair of coated crimping pieces 25A, 25A.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to an electric wire with a terminal.

Automobiles are equipped with a wide variety of electronic devices, and wire harnesses are installed to transmit power, control signals, and the like to the electronic devices. Aluminum is sometimes used as the material of the conductor core wire for the electric wire that constitutes such a wire harness. When connecting an aluminum electric wire (hereinafter referred to as an electric wire) having such an aluminum conductor core wire to a terminal, a technique for preventing corrosion of the connection portion between the electric wire and the terminal has been disclosed (see, for example, Patent Document 1). .).

Patent Literature 1 discloses an electric wire with a terminal, which includes an electric wire, a terminal connected to the electric wire, and an anti-corrosion portion covering a connection portion between the electric wire and the terminal. An electric wire includes a core wire and a coating that covers the core wire. Further, the terminal portion of the electric wire is provided with an exposed core wire portion formed by peeling off a covering portion of a predetermined length.

A terminal includes a contact portion connected to a mating terminal, and a wire holding portion continuing to the rear of the contact portion. The electric wire holding portion is provided with a core wire crimping portion for crimping the exposed core portion of the electric wire and a covering crimping portion for crimping the covering portion of the electric wire.

In the state where the terminal is connected to the electric wire, the anti-corrosion part applies the anti-corrosion in a flowing state between the contact part and the core wire crimping part of the electric wire holding part, the core wire crimping part, the covering crimping part and the core wire crimping part of the electric wire holding part. A coating is formed by dripping between and onto the coated crimped portion, and the coating is cured to form the anti-corrosion portion.

JP 2015-153721 A

However, in the conventional electric wire with a terminal, when the fluidized anticorrosion is dripped in the manufacturing process, it flows on the outer peripheral surface of the insulation crimping part of the wire holding part, and the fluidized anticorrosion adheres to the bottom surface of the terminal. , for example, the mounting table on which the terminal is mounted may be affected.

SUMMARY OF THE INVENTION An object of the present invention is to provide a terminal-equipped electric wire that suppresses adhesion of anti-corrosion material to the bottom surface of the terminal.

In order to solve the above problems and achieve the object, the invention described in claim 1 provides an electric wire having a core wire and a covering portion covering the core wire, a terminal connected to the electric wire, and the terminal connected to the electric wire. An electric wire with a terminal, comprising: a corrosion-proof portion that covers a connection portion between the electric wire and the terminal in a connected state, wherein the terminal includes a mounting portion on which the electric wire is mounted; a pair of core wire crimping pieces extending from a portion and formed to crimp and crimp the core wire; and a pair of covering crimp pieces extending from the placing portion and formed to crimp and crimp the covering portion, A guide portion is provided on the outer peripheral surface of the pair of covering crimping pieces to guide and guide the anti-corrosion material in a fluid state rearward away from the pair of core crimping pieces.

ADVANTAGE OF THE INVENTION According to this invention, suppression of anti-corrosion sticking to the bottom face of a terminal can be aimed at.

BRIEF DESCRIPTION OF THE DRAWINGS It is a side view which shows the electric wire with a terminal which concerns on one embodiment of this invention. FIG. 2 is a cross-sectional view taken along line II in FIG. 1; It is a figure for demonstrating the problem of this invention.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. FIG. FIG. 1 is a side view showing an electric wire 1 with a terminal according to one embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line II in FIG. FIG. 3 is a diagram for explaining the problem of the present invention. The terminal-equipped electric wire 1 constitutes a wire harness housed in a housing (not shown) and routed to an automobile.

As shown in FIG. 1 , the terminal-equipped electric wire 1 includes a covered electric wire 11 (hereinafter referred to as an electric wire 11 ), a terminal 2 connected to an end portion of the electric wire 11 , and a terminal 2 connected to the electric wire 11 . , and an anti-corrosion portion 3 covering a connecting portion between the electric wire 11 and the terminal 2 . In this embodiment, the axial direction of the electric wire 11 (referred to as the front-rear direction X) is indicated by the arrow X, the direction perpendicular to the arrow X (referred to as the vertical direction) is indicated by the arrow Z, and both the arrow X and the arrow Z are perpendicular to each other. An arrow Y indicates a direction (referred to as a left-right direction). In the present embodiment, the side of the wire 11 on which the terminal 2 is provided may be referred to as "front X1" and the opposite side may be referred to as "rear X2".

As shown in FIG. 1 , the electric wire 11 includes a core wire 12 that is an assembly of conductive linear strands, and a covering portion 13 that covers the core wire 12 with insulation. The electric wire 11 is provided with its axis along the front-rear direction X. As shown in FIG. The strand contains aluminum. In other words, the electric wire 11 is an aluminum electric wire or an aluminum alloy electric wire. As shown in FIG. 1 , the electric wire 11 has the covering portion 13 peeled off at the terminal portion on the front X1 side of the electric wire 11 to form an exposed core portion 120 in which the core wire 12 is exposed. Moreover, in the present embodiment, the core wire 12 is composed of a twisted wire composed of a plurality of strands, but the core wire 12 may be a single wire.

Terminal 2 is made of copper or a copper alloy. As shown in FIG. 1 , the terminal 2 has a box-shaped mating connection portion 21 connected to the mating terminal 2 (not shown), and the mating connection portion 21 is continuously connected to each terminal portion of the electric wire 11 . and a wire connecting portion 22 .

As shown in FIG. 1 , the wire connecting portion 22 includes a mounting portion 23 on which the end portion of the wire 11 is mounted, and a core wire connecting portion that is connected to the mounting portion 23 and electrically connected to the exposed core portion 120 . 24 , and a covering connection portion 25 that is continuous with the mounting portion 23 and mechanically connected to the covering portion 13 of the electric wire 11 . The coating connection portion 25 is provided at a position spaced backward X2 from the core wire connection portion 24 . Below, the space between the mating connection portion 21 and the core wire connection portion 24 may be referred to as a "neck portion 26", and the space between the core wire connection portion 24 and the covering connection portion 25 may be referred to as a "connecting portion 27".

As shown in FIG. 1, the core wire connecting portion 24 has a pair of core wire crimping pieces 24A, 24A that extend from the mounting portion 23 and are crimped to the exposed core portion 120 by crimping. The pair of core wire crimping pieces 24A, 24A has a length such that the ends of the pair of core wire crimping pieces 24A, 24A are in contact with each other when the core wire 12 is crimped and crimped. tightened. Further, as shown in FIG. 1, in a state in which the core wire connection portion 24 crimps the core wire 12, the core wire exposed portion 120 is positioned so as to protrude forward X1 and rearward X2 of the core wire connection portion 24. A front end portion 120f of the core wire exposed portion 120 extends to an intermediate portion in the front-rear direction X of the neck portion 26 of the terminal 2, and a rear end portion 120b of the exposed core portion 120 extends to an intermediate portion in the front-rear direction X of the connecting portion 27 of the terminal 2. It is provided extending to the part.

As shown in FIGS. 1 and 2, the covering connection portion 25 has a pair of covering crimping pieces 25A, 25A that extend from the mounting portion 23 and are crimped onto the covering portion 13 of the electric wire 11 by crimping. The covering crimping pieces 25A, 25A have a length such that their ends face each other when the covering portion 13 is crimped and crimped, and as shown in FIG. are crimped so that they are in contact with each other to form the covering crimp portion 250 . In this embodiment, as shown in FIG. 2, the covering crimping portion 250 is crimped so that the cross section perpendicular to the central axis P of the electric wire 11 has a circular shape. 2, the anti-corrosion portion 3, which will be described later, is omitted.

The coating pressure-bonding portion 250 is provided with a guide portion 4 that guides and guides the later-described fluidized anticorrosive material 3 (the same reference numeral as the anticorrosive portion 3) to the rear X2. As shown in FIG. 2, the guide portions 4 are provided on both the left and right sides of the electric wire 11. It is provided within a range from a point A positioned above Z1 to a point B positioned in the left-right direction Y through the center axis P of the electric wire 11 . In this embodiment, as shown in FIG. 1, the guide portion 4 is configured to have three (plurality) groove portions 4A, 4B, and 4C formed on the outer peripheral surface of the covering crimping portion 250. As shown in FIG. Regarding the three grooves 4A, 4B, and 4C, as shown in FIG. 1, the groove positioned above Z1 is referred to as "first groove 4A", and the groove positioned below Z2 of first groove 4A is referred to as "second groove." 4B", and the groove located below Z2 of the second groove 4B may be referred to as "third groove 4C".

As shown in FIG. 1, the three grooves 4A, 4B, and 4C are arranged vertically at regular intervals. Each of the grooves 4A, 4B, and 4C has a front end 4f positioned at an intermediate portion in the longitudinal direction X of the covering crimping portion 250 and provided above the center axis P of the electric wire 11 Z1, as shown in FIG. Each of the grooves 4A, 4B, and 4C has a front end 4f located above the rear end 4b Z1, and is smoothly curved obliquely downward from the front end 4f to the rear end 4b. It is formed to extend to the rear edge 4b of the crimping portion 250 (the same reference numerals as the rear ends of the grooves are given).

In the state where the terminal 2 is connected to the electric wire 11, the anti-corrosion portion 3 includes a neck portion 26, a front end portion 120f of the core wire exposed portion 120 projecting forward X1 from the core wire connection portion 24, the core wire connection portion 24, the connecting portion 27, and the core wire connection. Corrosion preventive 3, which is a melted and fluidized UV curable resin, is applied to the rear end portion 120b of the core wire exposed portion 120 projecting backward X2 from the portion 24 and the coated crimping portion 250, and is formed by curing. The anti-corrosion portion 3 suppresses corrosion of the exposed core portion 120 . In addition, in the present embodiment, the neck portion 26, the front end portion 120f of the core wire exposed portion 120 projecting forward X1 from the core wire connection portion 24, the core wire connection portion 24, the connecting portion 27, the core wire projecting backward X2 from the core wire connection portion 24 The rear end portion 120b of the exposed portion 120 and the cover crimping portion 250'' are the connecting portions between the electric wire 11 and the terminal 2 (in the claims). The connection part is covered with the anti-corrosion part 3 .

Next, the procedure for manufacturing the electric wire with terminal 1 having the above configuration will be described. First, the core wire exposed portion 120 is formed by peeling off the covering portion 13 at the terminal portion of the electric wire 11 in advance. Next, the end portion of the electric wire 11 is placed on the mounting portion 23 of the terminal 2, and the exposed core portion 120 of the electric wire 11 is crimped by the pair of core wire crimping pieces 24A, 24A. Also, the covering portion 13 of the electric wire 11 is crimped by the pair of covering crimping pieces 25A, 25A. In this manner, the core wire connection portion 24 is electrically connected to the end portion of the electric wire 11, the covering connection portion 25 is mechanically connected to the end portion of the electric wire 11, and the terminal 2 is connected to the end portion of the electric wire 11. be done.

After that, the molten anti-corrosion layer 3 is dripped continuously from the neck portion 26 of the terminal 2 to the cover crimping portion 250 . At this time, in the covering crimping portion 250, the molten anti-corrosion layer 3 enters the first groove portion 4A and is guided rearward X2 within the first groove portion 4A. Here, the molten anti-corrosion material 3 overflowing from the first groove portion 4A enters the second groove portion 4B, is guided rearward X2 in the second groove portion 4B, and is further overflowed from the second groove portion 4B in the molten state. The anti-corrosion material 3 enters the third groove portion 4C, is guided rearward X2 in the third groove portion 4C, and is guided rearward X2 of the rear end edge 4b of the covering crimp portion 250. As shown in FIG. Thereafter, the molten anticorrosion portion 3 is hardened to form the anticorrosion portion 3 . Thus, the electric wire 1 with a terminal is completed.

Next, the effects of this embodiment will be described. FIG. 3 is a diagram for explaining the problem of the present invention. The conventional electric wire 100 with a terminal shown in FIG. 3 is not provided with the guide portion 4 for guiding and guiding the anti-corrosion material 3 in a flowing state backward X2. Therefore, when the fluidized anti-corrosion material 3 is dripped, as shown in FIG. 23 and may extend to a mounting table (not shown) on which the terminal 2 is mounted. However, as shown in FIG. A guide portion 4 is provided on the outer peripheral surface of the coating pressure-bonding portion 250 to guide and guide the anti-corrosion material 3 in a fluid state backward X2. According to this configuration, the guide portion 4 guides and guides the anti-corrosion material 3 in the fluid state to the rear X2, thereby suppressing the adhesion of the anti-corrosion material 3 to the bottom surface 230 of the terminal 2, and furthermore, the anti-corrosion material 3 is prevented from adhering to the bottom surface 230 of the terminal 2. An increase in the size of the attached electric wire 1 in the vertical direction Z can be suppressed.

Further, the guide portion 4 is provided in a groove shape, and the guide portion 4 is provided above the central axis P of the electric wire 11 Z1 in a state where the pair of covering crimping pieces 25A and 25A are crimped to the covering portion 13, Further, it is formed so as to extend obliquely downward toward the rear X2, and is provided so as to extend to the rear end edges (denoted by reference numeral 4b) of the pair of covering crimping pieces 25A, 25A. According to this, the guide portion 4 realizes a structure in which the anti-corrosion 3 in the fluid state is guided and guided rearward X2.

It should be noted that the present invention is not limited to the above-described embodiments, but includes other configurations and the like that can achieve the object of the present invention, and the following modifications and the like are also included in the present invention.

In the above-described embodiment, the grooves 4A, 4B, and 4C in the guide portion 4 have the front end 4f positioned higher than the rear end 4b, and are smoothly curved from the front end 4f to the rear end 4b. The invention is not limited to this. Each of the grooves 4A, 4B, and 4C may have a front end 4f positioned higher than the rear end 4b, and may be configured linearly from the front end 4f to the rear end 4b. Alternatively, each of the grooves 4A, 4B, and 4C may be formed so that the front end 4f and the rear end 4b are positioned at the same height, and the guide portion guides and guides the anti-corrosion protection 3 in the fluid state backward X2. If it is configured to be, it shall be included in the scope of the present invention. Further, the guide portion 4 is configured to have three groove portions 4A, 4B, and 4C formed on the outer peripheral surface of the covering pressure-bonding portion 250, but the present invention is not limited to this. The guide portion 4 may be configured with one, two, or four or more grooves.

In addition, in the present embodiment, the guide portion is configured to have three (plural) grooves 4A, 4B, and 4C formed on the outer peripheral surface of the covering crimping portion 250, but the present invention is limited to this. not to be The guide portion may be formed as a ridge protruding from the outer peripheral surface of the covering pressure-bonding portion 250 .

In the above-described embodiment, the pair of covering crimping pieces 25A, 25A has such a length that the tips of the covering crimping pieces 25A, 25A face each other when they are crimped onto the covering portion 13 of the electric wire 11, as shown in FIG. Each covering crimping piece 25A is curved and each tip extends toward the covering portion 13 in a crimped state, but the present invention is not limited to this. The pair of covering crimping pieces 25A, 25A may be crimped onto the covering portion 13 of the electric wire 11, and the tips of the pair of covering crimping pieces 25A, 25A may overlap each other.

In addition, although the best configuration, method, etc. for carrying out the present invention have been disclosed in the above description, the present invention is not limited thereto. That is, although the present invention has been particularly illustrated and described primarily with respect to particular embodiments, it may be modified in any manner to such embodiments without departing from the spirit and scope of the invention. , materials, quantity, and other detailed configurations can be modified in various ways by those skilled in the art. Therefore, the descriptions that limit the shape, material, etc. disclosed above are exemplified to facilitate understanding of the present invention, and do not limit the present invention. The description by the name of the member that removes all or part of the limitation such as is included in the present invention.

1 wire with terminal 2 terminal 3 anti-corrosion part (anti-corrosion in fluid state)
4 guide part 4b rear end of guide part (rear edge of a pair of coated crimping pieces)
11 electric wire 12 core wire
13 Coating portion 23 Mounting portions 24A, 24A A pair of core wire crimping pieces 25A, 25A A pair of covering crimping pieces P Central axis of electric wire

Claims (2)

An electric wire having a core wire and a covering portion covering the core wire, a terminal connected to the electric wire, and a corrosion protection portion covering a connecting portion between the electric wire and the terminal while the terminal is connected to the electric wire. An electric wire with a terminal comprising
The terminal includes a mounting portion on which the electric wire is mounted, a pair of core wire crimping pieces extending from the mounting portion for crimping and crimping the core wire, and extending from the mounting portion. A pair of covering crimping pieces for crimping and crimping the covering portion,
In a state in which the pair of covering crimping pieces crimps and crimps the covering portion, guides are provided on the outer peripheral surfaces of the pair of covering crimping pieces to guide and guide the anti-corrosion agent in a flowing state rearward away from the pair of core crimping pieces. An electric wire with a terminal, characterized in that a portion is provided. The guide portion is provided in a groove shape,
In a state in which the pair of covering crimping pieces crimp the covering section, the guide section is provided above the central axis of the electric wire, away from the mounting section, and obliquely downward toward the rear. 2. The electric wire with a terminal according to claim 1, wherein the wire is formed so as to extend to the rear end edges of the pair of coated crimping pieces.

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