JP2022156093A - Terminal-equipped wire and manufacturing method thereof - Google Patents

Abstract

To easily crimp a flat electric wire to various crimp terminals.SOLUTION: A terminal-equipped wire includes a flat covered wire having a conductor portion composed of a plurality of strands and an insulating coating that covers the conductor portion, and a crimp terminal having the conductor portion crimp-connected with the insulation coating and the conductor exposed portion exposed from the insulation coating being crimped, and in the vicinity of the crimp terminal side of the covered wire, the insulation coating is crimped such that one of the side surfaces substantially orthogonal to the flat surface of the covered wire is the bottom side of the crimp terminal, and a break is provided in the insulating coating in the vicinity of the side of the conductor exposed portion of the covered wire.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to an electric wire with a terminal and a method for manufacturing an electric wire with a terminal.

Vehicles such as automobiles are rapidly becoming electrified, as typified by hybrid vehicles and electric vehicles, and becoming multifunctional or highly functional, as typified by automatic driving systems and connected cars. Therefore, wire harnesses used in such vehicles need to be compatible with complicated wiring routes and have high heat dissipation.

A belt-like flat electric wire in which a plurality of strands are arranged in parallel is sometimes used as a wire harness for such applications. A crimp terminal is crimp-connected to one end of the flat electric wire. In this case, the upper side of the insulation coating that is crimped by the insulation barrel piece may wrinkle, creating a gap between the insulation coating and the wire, or the excess upper side of the insulation coating may protrude from the top of the insulation barrel. be. As a result, it becomes difficult to ensure a stable crimped state, and there is a possibility that concerns may arise about ensuring tensile strength and conduction stability. Moreover, there was a possibility of affecting the waterproofing process and housing in the connector. On the other hand, Patent Document 1 discloses a terminal fitting that can be crimped by making the interval between the wire barrel pieces longer than the length of the conductor exposed portion of the flat electric wire and making the interval between the insulation barrel pieces longer than the width of the insulation coating. is proposed.

JP 2011-014283 A

In Patent Document 1, although the conductor exposed portion and the covered portion covered with the insulating coating can be accommodated in the crimp terminal without performing a process such as bending in advance, it is necessary to make the crimp terminal suitable for the shape of the flat electric wire. be. On the other hand, when an existing crimp terminal is used, there is a possibility that the width parallel to the flat surface of the flat electric wire may not fit within the width of the insulation barrel. Therefore, in order to fit the coating of the flat wire into the insulation barrel of the existing crimp terminal, it is necessary to perform pretreatment so that the insulation coating fits within the barrel width during or after crimping. That is, after the exposed conductor portion composed of a plurality of wires and the covered portion covered with an insulating coating are rounded by pretreatment, the wire barrel and insulator of an open-barrel crimp terminal having a U-shaped or V-shaped base are used. It is crimped onto the ration barrel.

In addition, if a flat wire is placed horizontally on an existing crimp terminal, that is, if the flat surface of the flat wire is placed substantially parallel to a U-shaped or V-shaped bottom portion and crimped, The flattened surface may not fit into existing crimp terminals. Therefore, there has been a demand for a technology that can easily accommodate a flat electric wire in various crimp terminals including existing crimp terminals and that can easily crimp the flat electric wire to various crimp terminals.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and an object thereof is to provide an electric wire with a terminal and a method for manufacturing the same, which can easily crimp a flat electric wire to various crimp terminals. .

In order to solve the above-described problems and achieve the above-described objects, the present invention provides a terminal-equipped wire having a flat shape having a conductor portion composed of a plurality of strands and an insulating coating covering the conductor portion. and a crimp terminal to which the conductor portion is crimp-connected in a state in which the insulation coating and the conductor exposed portion exposed from the insulation coating are crimped, wherein the crimp terminal side of the coated wire is provided. In the vicinity, the insulating coating is crimped so that one of the side surfaces substantially orthogonal to the flattened surface of the coated wire is on the bottom side of the crimp terminal, and the conductor exposed portion side of the coated wire is crimped. A break is provided in the insulating coating in the vicinity of the .

Further, in the electric wire with a terminal according to one aspect of the present invention, in the above invention, the cut is provided in a portion where the insulating coating is flat.

Further, in the electric wire with a terminal according to one aspect of the present invention, in the above invention, the cut is provided on a portion of the side surface with respect to the flat portion of the insulating coating.

Further, in the electric wire with a terminal according to one aspect of the present invention, in the above invention, a plurality of the cuts are provided in the insulating coating.

Further, in the electric wire with a terminal according to one aspect of the present invention, in the invention described above, the cut is provided along the longitudinal direction of the covered electric wire.

Moreover, the electric wire with a terminal according to one aspect of the present invention is characterized in that, in the above invention, the cut is provided at a predetermined angle with respect to the longitudinal direction of the covered electric wire.

Further, in the electric wire with terminal according to one aspect of the present invention, in the above invention, the cut line has at least one shape of a straight line, a wavy shape, and a zigzag shape.

Further, in the electric wire with a terminal according to one aspect of the present invention, in the above invention, the insulating coating at the cut portion is overlapped in the vicinity of the portion where the exposed conductor portion is crimped by the crimp terminal. It is characterized by

Further, in the electric wire with a terminal according to an aspect of the present invention, in the above invention, the crimp terminal includes a wire barrel for crimping connection by rolling the exposed conductor portion, and an insulation barrel for crimping connection by rolling the insulating coating. and an open-barrel terminal.

Further, in the electric wire with terminal according to one aspect of the present invention, in this configuration, at least one of the wire barrel and the insulation barrel has a staggered shape or a zigzag shape.

In addition, a method for manufacturing an electric wire with a terminal according to an aspect of the present invention provides a flat covered electric wire having a conductor portion composed of a plurality of strands and an insulating coating covering the conductor portion. a step of cutting off the insulating coating to form a conductor exposed portion exposing the conductor portion; A step of forming a cut, a step of reducing the diameter of the coated wire by overlapping the insulating coating at the cut portion or narrowing the cut, and reducing the oblateness of the exposed conductor portion and the insulating coating. and a step of crimping and connecting the exposed conductor portion and the insulating coating with the crimp terminal.

INDUSTRIAL APPLICABILITY According to the electric wire with a terminal and the method for manufacturing the electric wire with a terminal according to the present invention, it is possible to easily crimp the flat electric wire to various crimp terminals. .

FIG. 1 is a schematic diagram showing a schematic configuration of a crimp terminal and a coated wire in an electric wire with a terminal according to a first embodiment of the present invention. FIG. 2 is a side view of the terminal-equipped wire according to the first embodiment of the present invention. FIG. 3 is a cross-sectional view taken along line III-III shown in FIG. 2, perpendicular to the longitudinal direction of the terminal-equipped wire according to the first embodiment of the present invention. FIG. 4 is a side view of a terminal-equipped wire according to a first modification of the first embodiment of the present invention. FIG. 5 is a bottom view of a terminal-equipped wire according to a first modification of the first embodiment of the present invention. FIG. 6 is a cross-sectional view along line III-III shown in FIGS. 4 and 5 according to the first modification. FIG. 7 is a side view of a terminal-equipped wire according to a second modification of the first embodiment of the present invention. FIG. 8 is a cross-sectional view along line VIII--VIII shown in FIG. 7 according to the second modification. FIG. 9 is a side view of a terminal-equipped wire according to a third modification of the first embodiment of the present invention. FIG. 10 is a cross-sectional view along line XX shown in FIG. 9 according to the third modification. FIG. 11 is a side view of a terminal-equipped wire according to a fourth modification of the first embodiment of the present invention. FIG. 12 is a cross-sectional view along line XII-XII shown in FIG. 11 according to the fourth modification. FIG. 13 is a side view of a terminal-equipped wire according to a fifth modification of the first embodiment of the present invention. FIG. 14 is a cross-sectional view along line XIV-XIV shown in FIG. 13 according to the fifth modification. FIG. 15 is a side view of a terminal-equipped wire according to a sixth modification of the first embodiment of the present invention. FIG. 16 is a cross-sectional view along line XVI--XVI shown in FIG. 15 according to the sixth modification. FIG. 17 is a top view of a terminal-equipped wire according to a seventh modification of the first embodiment of the present invention. FIG. 18 is a cross-sectional view along line XVIII--XVIII shown in FIG. 17 according to the seventh modification. FIG. 19 is a schematic diagram showing a schematic configuration of a crimp terminal and a coated wire in an electric wire with a terminal according to a second embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in all the drawings of the following embodiments, the same reference numerals are given to the same or corresponding parts. Moreover, the present invention is not limited to the embodiments described below.

(First embodiment)
(Crimp terminals and coated wires)
Before describing an electric wire 1 with a terminal according to an embodiment of the present invention, a schematic configuration of a crimp terminal and a covered electric wire will be described with reference to FIG. As shown in FIG. 1 , a flat covered electric wire 10 has a conductor 11 and an insulating covering 12 . The conductor 11 is a conductor-parallel type flat conductor portion in which a plurality of wires 111 extending in the longitudinal direction X are arranged side by side, and the wires 111 are arranged in two layers in parallel, for example. The insulating coating 12 is an insulating coating formed on the outer circumference of the flat conductor 11 . In addition, in this specification, the longitudinal direction X means the longitudinal direction of the crimp terminal 20 . A direction Y means a direction perpendicular to the direction X in a plane parallel to the bottom surface of the crimp terminal 20 . Furthermore, direction Z means a direction substantially perpendicular to the plane in which direction X and direction Y are included.

The flat coated electric wire 10 has an exposed conductor portion 112 in which the insulating coating 12 on the outer circumference of the conductor 11 is removed at the tip portion, and the conductor 11 of a predetermined length is exposed. The insulation coating 12 of the flat covered electric wire 10 has a slit 121 as a cut in a portion on the conductor exposed portion 112 side. In the following description, in the longitudinal direction X of the covered electric wire 10, the front side is the conductor end side, which is the tip side, and the rear side is the covered side, which is the base end side.

The conductor 11 is composed of a plurality of strands 111 and is made of, for example, high-purity aluminum (Al) or an aluminum alloy (Al alloy), but is not necessarily limited to these materials. In the present embodiment, the covered electric wire 10 is an electric wire having a cross-sectional area of, for example, 3.5 mm ² (3.5 sq) or more and 90 mm ² (90 sq) or less, for example 20 sq. The cross-sectional area of the coated electric wire 10 is the sum of the cross-sectional areas of the individual wires 111, that is, the total cross-sectional area. The insulating coating 12 is made of insulating resin such as polyvinyl chloride (PVC), polyethylene, or a non-halogen material. Additives such as a plasticizer may be added to the resin forming the insulating coating 12 .

The crimp terminal 20 before crimp connection is an open barrel type terminal. The crimp terminal 20 is formed by processing a plate material made of a copper alloy such as brass having a tin-plated (Sn-plated) surface. The crimp terminal 20 includes a terminal connection portion (not shown), a transition portion 22, a wire barrel 23, and an insulation barrel, which are sequentially connected from the front in the longitudinal direction X, which is the distal side, toward the rear, which is the proximal side. 24. The conductor crimp portion is a portion where the exposed conductor portion 112 is rolled by the wire barrel 23 and crimped and connected, and the coated crimp portion is a portion where the conductor 11 covered with the insulating coating 12 is rolled and crimped by the insulation barrel 24. part. The shape of the wire barrel 23 and the insulation barrel 24 shown in FIG. 1 is a substantially rectangular planar shape, but the planar shape may be a zigzag shape or a zigzag shape. By making the shape of the wire barrel 23 and the insulation barrel 24 a zigzag shape or a zigzag shape, it is possible to further prevent the covered wire 10 from coming off or coming off.

The terminal connecting portion (not shown) is composed of, for example, a connection structure of a female crimp terminal or a connection structure of a sleeve-shaped terminal (hereinafter referred to as a sleeve terminal). Note that the connection structure is not limited to this, and may be a connection structure having other shapes such as a male crimp terminal or a round crimp terminal. The transition portion 22 is a portion that connects the terminal connection portion and the wire barrel 23 .

The wire barrel 23 has a U-shaped cross section on the YZ plane that is open upward in the height direction Z and has a bottom located downward, and has a shape extending in the longitudinal direction X. As shown in FIG. Similarly, the insulation barrel 24 also has a U-shaped cross section on the YZ plane that is open upward in the height direction Z and has a bottom located downward, and has a shape extending in the longitudinal direction X. . The wire barrel 23 and the insulation barrel 24 are connected on the lower side. In this embodiment, the wire barrel 23 and the insulation barrel 24 are both U-shaped, but V-shaped ones can also be used. In this specification, the directions of the upper side and the lower side in the height direction Z are specified for convenience in order to explain the relative positional relationship between the constituent elements. A surface 23a of the wire barrel 23 is formed with a plurality of serrations 23b. Although the number of serrations 23b in this embodiment is three, the number is not limited to three.

FIG. 2 is a side view of the terminal-attached electric wire 1 according to this embodiment. FIG. 3 is a cross-sectional view taken along line III-III shown in FIG. 2 perpendicular to the longitudinal direction of the terminal-equipped wire 1 according to the present embodiment. The width direction of the flat covered wire 10 is the direction parallel to the long side or the long axis of the substantially rectangular or substantially elliptical shape in the cross section along the plane perpendicular to the longitudinal direction of the covered wire 10. is. A plane parallel to the width direction of the covered electric wire 10 is a flat plane (hereinafter referred to as a flat plane). The thickness direction of the covered wire 10 is the direction parallel to the short side or the short axis of the substantially rectangular or substantially elliptical shape in the cross section along the plane orthogonal to the longitudinal direction of the covered wire 10 . A surface parallel to the thickness direction of the coated wire 10 is a side surface (hereinafter referred to as a side surface) in the width direction of the coated wire 10 .

As shown in FIG. 2, in this embodiment, the coated wire 10 has a longitudinal direction substantially parallel to the longitudinal direction X of the crimp terminal 20, a width direction of the crimp terminal 20 in the height direction Z, and a thickness direction of the crimp terminal 20. It is crimped to the crimp terminal 20 so as to be substantially parallel to the width direction Y of the terminal 20 . In addition, in this embodiment, the slits 121 are formed linearly on both sides along the width direction of the covered electric wire 10, for example. Note that the slit 121 may be formed only on one side along the width direction of the coated wire 10 . The slit 121 formed in the insulated wire 10 is narrowed, closed, or partly overlapped with the insulation coating 12 at least one of before and during crimping, and the crimp terminal 20 is closed. is crimped to Insulation can be ensured by closing the slit 121 or overlapping a part of the insulating coating 12 at the end. As shown in FIGS. 1 and 3, in the present embodiment, the conductor 11 and the insulating coating 12 of the covered electric wire 10 are surrounded by the insulation barrel 24 of the crimp terminal 20, and the slit 121 formed before crimping. are overlapped.

By providing a slit 121 in a part of the insulating coating 12, when the covered wire 10 is crimped to the crimp terminal 20, by overlapping a part of the insulating coating 12 in a cross section orthogonal to the longitudinal direction of the covered wire 10, The circumference can be shortened. Depending on the shape of the slit 121, the width of the slit 121 may be narrowed or the slit 121 may be closed. Therefore, the oblateness of the flat-shaped conductor 11 can be easily reduced by the pretreatment for crimping the covered wire 10 to the crimp terminal 20 . Since the oblateness of the covered electric wire 10 can be easily reduced, the exposed conductor portion 112 and the tip portion of the insulating coating 12 can be easily deformed, so that the cross-sectional shapes of the conductor 11 and the insulating coating 12 can be easily changed to cover the crimped portion of the crimp terminal 20. It can be formed into a shape such that the electric wire 10 can be easily accommodated, for example, a substantially circular shape. Moreover, by providing the slit 121 in a part of the insulating coating 12, the rigidity of the crimped portion of the coated wire 10 can be made lower than the rigidity of the other portions other than the crimped portion of the flat electric wire. As a result, when the conductor exposed portion 112 is rounded and crimped by the wire barrel 23, the end portion side of the insulation coating 12 crimped by the insulation barrel 24 is easily deformed following the deformation of the conductor exposed portion 112, and crimping is performed. Crimping to the terminal 20 is facilitated.

(Manufacturing method of electric wire with terminal)
Next, a method of manufacturing an electric wire with a terminal for connecting the covered electric wire 10 according to the first embodiment configured as described above to the crimp terminal 20 will be described. When manufacturing the electric wire 1 with a terminal according to the first embodiment, first, the insulating coating 12 at one end of the flat covered electric wire 10 is cut off to form a conductor exposed portion 112 exposing the conductor 11. . Next, slits 121 are formed at the ends of the insulating coating 12 .

Next, the oblateness of the exposed conductor portion 112 and the slit 121 is reduced, and the cross-sectional shape thereof is formed into a shape that can be easily accommodated in the crimped portion of the crimp terminal 20, for example, a substantially circular shape. Here, in order to maintain the state where the exposed conductor portion 112 after molding is rounded to reduce the oblateness and the state where the ends of the slits 121 are overlapped, the exposed conductor portion 112 and the slit 121 are held by jigs. You can press it. Similarly, in order to maintain the state of the exposed conductor portion 112 and the slit 121 after molding, the conductor 11 of the exposed conductor portion 112 and the insulating coating 12 of the slit 121 may be subjected to preliminary processing.

Next, the longitudinal direction of the coated wire 10 is aligned with the longitudinal direction X of the crimp terminal 20 , and the width direction of the coated wire 10 is aligned with the height direction Z of the crimp terminal 20 . In other words, the covered wire 10 is arranged such that the cross section of the flat portion of the covered wire 10 is vertically long with respect to the crimped portion of the crimp terminal 20 . Next, the covered electric wire 10 and the crimp terminal 20 are overlapped so that the exposed conductor portion 112 is accommodated in the bottom portion of the wire barrel 23 and part of the tip side of the insulating coating 12 is accommodated in the bottom portion of the insulation barrel 24 . match.

At least a portion of the exposed conductor portion 112 may be joined by ultrasonic joining so that the cross-sectional shape thereof is rounded. When part of the exposed conductor portion 112 is ultrasonically bonded, the front side or the rear side of the exposed conductor portion 112 may be used as the ultrasonically bonded portion. By ultrasonically bonding a portion of the exposed conductor portion 112 , the exposed conductor portion 112 can be easily accommodated in the wire barrel 23 and the conductivity between the wires 111 can be ensured.

Next, a pressure is applied to the outer periphery of the crimp terminal 20 to crimp-connect the crimp terminal 20 to the exposed conductor portion 112 and a part of the insulating coating 12 . As a result, the wire barrel 23 of the crimp terminal 20 is crimped, and the surface 23 a of the crimp terminal 20 comes into contact with the exposed conductor portion 112 to wrap the conductor 11 . In addition, the crimping process is performed so that the insulation barrel 24 wraps a part of the insulating coating 12 and is crimped and connected. That is, as shown in FIGS. 2 and 3, the wire barrel 23 is contacted and crimped along the outer periphery of the conductor 11, and the insulation barrel 24 is contacted and crimped along the outer periphery of the insulating coating 12. FIG. The electric wire 1 with a terminal is completed by this.

Conventionally, when a flat covered electric wire 10 is crimped with a U-shaped or V-shaped crimp terminal, the flat covered electric wire 10 is crimped so that its width direction is parallel to the bottom of the crimp terminal 20. was difficult. On the other hand, in the present embodiment, by providing the slit 121 in the vicinity of the exposed side of the conductor 11 of the insulating coating 12, the flat coated electric wire 10, the wire barrel 23 and the insulation barrel 24 have a U-shape. When the shaped crimp terminal 20 is crimped and connected, the conductor crimped portion and the covered crimped portion are rounded to facilitate crimping. That is, in the present embodiment, by providing the slit 121 at the end of the insulating coating 12 , the insulating coating 12 can be contracted along the bottom shape of the insulation barrel 24 , or the outer periphery of the insulating coating 12 can be compressed by the insulation barrel 24 . Since the circumference of the cross section perpendicular to the longitudinal direction of the insulating coating 12 can be shortened when the insulating coating 12 is rolled and crimped, the insulating coating 12 can be easily rolled along the shape of the insulation barrel 24 . Thereby, the insulation coating 12 can be easily crimped by the insulation barrel 24 . Furthermore, since the insulating coating 12 is easily deformed by the slit 121, when it is rolled and crimped by the insulation barrel 24, no excessive force is applied to the conductor 11, and the possibility of wire breakage is reduced. It is possible to avoid the problem that 24 cannot be fully crimped due to the elastic force caused by the material of the insulating coating 12, thereby improving connection reliability.

(Modification)
In the first embodiment described above, the slits 121 in the covered wire 10 are formed linearly on both sides when viewed in the width direction, but the slits 121 are not necessarily formed linearly on both sides along the width direction. . Modifications of the coated wire 10 according to the first embodiment will be described below. 4, 7, 9, 11, 13, and 15 are side views of electric wires with terminals according to first to sixth modifications of the first embodiment, respectively. FIG. 5 is a bottom view of a terminal-equipped wire according to a first modified example. 6, 8, 10, 12, 14, 16, and 18 are cross-sectional views of electric wires with terminals according to first to seventh modifications of the first embodiment, respectively. FIG. 17 is a top view of a terminal-equipped wire according to a seventh modification of the first embodiment.

(First modification)
As shown in FIGS. 4 and 5, in the terminal-equipped wire 1B according to the first modified example, a slit 122 is formed on the bottom side of the crimp terminal 20 on the side surface of the covered wire 10B. For example, the slit 122 is formed in a shape (dotted line in FIG. 5) in which the width in the thickness direction decreases from the vicinity of the conductor exposed portion 112 on the tip side of the insulating coating 12 of the covered wire 10B toward the rear end side. . As shown in FIG. 6, when the covered wire 10B is crimped to the insulation barrel 24 of the crimp terminal 20, the slit 122 is closed and the ends of the insulating coatings 12 are overlapped to form the covered wire 10B. diameter is reduced.

(Second modification)
As shown in FIG. 7, an electric wire 1C with a terminal according to the second modification is a surface parallel to the width direction, which is a flat surface of the covered electric wire 10C, and a slit 123 is formed on the side portion side of the crimp terminal 20. there is The longitudinal shape of the slit 123 along the flat surface of the coated wire 10C is, for example, a wave shape. The slits 123 are formed on both flat surfaces of the insulated wire 10C, that is, on both surfaces of the flat shape, but may be formed on one surface. As shown in FIG. 8, in a state in which the insulated wire 10C is crimped to the insulation barrel 24 of the crimp terminal 20, the ends of the insulating coating 12 are positioned in the slits 123 on both sides of the flat portion of the insulated wire 10C. They are overlapped to close the slit 123, and the diameter of the covered electric wire 10C is reduced while maintaining insulation.

(Third modification)
As shown in FIG. 9, an electric wire 1D with a terminal according to the third modification is a surface parallel to the width direction, which is a flat surface of a covered electric wire 10D, and a slit 124 is formed on the side portion side of the crimp terminal 20. there is The longitudinal shape of the slit 124 along the flat surface of the coated wire 10D is, for example, a zigzag shape (notched shape). The slits 124 are formed on both flat surfaces of the insulated wire 10D, that is, on both surfaces of the flat shape, but may be formed on one surface. As shown in FIG. 10, in a state in which the insulated wire 10D is crimped to the insulation barrel 24 of the crimp terminal 20, the ends of the insulating coating 12 are positioned in the slits 124 on both sides of the flat surface of the insulated wire 10D. They are overlapped to close the slit 124, and the diameter of the coated wire 10D is reduced while maintaining insulation.

(Fourth modification)
As shown in FIG. 11, the electric wire 1E with a terminal according to the fourth modification has a plane parallel to the width direction, which is a flat surface of the covered electric wire 10E, and a slit 125 is formed on the side portion side of the crimp terminal 20. there is The shape of the slit 125 along the flat surface of the covered wire 10E is, for example, linear and has a predetermined angle with respect to the longitudinal direction of the covered wire 10, that is, formed obliquely with respect to the longitudinal direction. . The slits 125 are formed on both sides of the flat portion of the covered electric wire 10E, but may be formed on one side. As shown in FIG. 12, in a state in which the insulated wire 10E is crimped to the insulation barrel 24 of the crimp terminal 20, the slits 125 of the insulating coating 12 are formed in the slits 125 on both sides of the flat surface of the insulated wire 10E. The ends are overlapped to close the slit 125, and the diameter of the coated electric wire 10E is reduced while maintaining insulation.

(Fifth modification)
As shown in FIG. 13, the terminal-equipped electric wire 1F according to the fifth modification is a surface parallel to the width direction, which is a flat surface of the covered electric wire 10F, and has a plurality, here two, on the side portion side of the crimp terminal 20. slits 126a and 126b are formed. The shape of the two slits 126a and 126b along the flat surface of the coated wire 10F is, for example, linear and substantially parallel to each other. A total of four slits 126a and 126b are formed on both sides of the flat portion of covered wire 10F, but two slits 126a and 126b may be formed only on one side, that is, one flat surface. Also, three or more slits may be formed.

As shown in FIG. 14, in a state where the insulated wire 10F is crimped to the insulation barrel 24 of the crimp terminal 20, the end portions of the slits 126a and 126b on both sides of the flat surfaces of the insulated wire 10F are overlapped. , the slits 126a and 126b are closed to reduce the diameter of the covered electric wire 10F while maintaining insulation.

(Sixth modification)
As shown in FIG. 15 , an electric wire 1G with a terminal according to the sixth modification is a flat surface of a covered electric wire 10G, and a slit 127 is formed on the side surface of the crimp terminal 20 . For example, the slit 127 is formed by removing the insulating coating 12 from the vicinity of the conductor exposed portion 112 on the front end side of the insulating coating 12 of the covered electric wire 10G toward the rear end side by a certain length. As shown in FIG. 16, in a state in which the coated wire 10G is crimped to the insulation barrel 24 of the crimp terminal 20, the interval of the slit 127 is narrowed, and the vicinity of the conductor exposed portion 112 on the tip side of the insulating coating 12 is reduced. , the width in the thickness direction increases toward the rear end side, and the diameter of the coated wire 10G is reduced.

(Seventh modification)
As shown in FIG. 17, in an electric wire 1H with a terminal according to the seventh modification, slits 128 are formed on both side surfaces of a covered electric wire 10H and on the top side and bottom side of the crimp terminal 20, respectively. The slit 128 is formed, for example, in a shape in which the width in the thickness direction decreases from the vicinity of the exposed conductor portion 112 on the front end side of the insulating coating 12 of the covered electric wire 10H toward the rear end side. As shown in FIG. 18, when the covered wire 10H is crimped to the insulation barrel 24 of the crimp terminal 20, the width of the slit 128 in the thickness direction is narrowed, and the diameter of the covered wire 10H is reduced. ing.

The shapes of the slits 122 to 128 along the surface of the insulating coating 12 in the first to seventh modifications described above are not limited to the shapes described above. The shape of the slit may be any other shape as long as the insulation and corrosion resistance of the coated wires 10 to 10H and the crimp terminal 20 can be ensured. Further, it is possible to appropriately combine the first embodiment and the first to seventh modifications, and the shape and arrangement are not limited to those described above.

The wire barrel 23 and the insulation barrel 24 in the first embodiment are both U-shaped and V-shaped open barrels. Closed-barrel examples such as are also applicable.

(Second embodiment)
Next, a method of manufacturing an electric wire with a tube terminal according to the second embodiment will be described. FIG. 19 is a perspective view for explaining a method for manufacturing an electric wire with terminals according to the second embodiment.

(Electric wire with terminal)
As shown in FIG. 19, a crimp terminal 20A made of a closed-barrel tube terminal has a tubular connecting portion 30. As shown in FIG. The tubular connection 30 comprises a sheath crimp area 30a, a conductor crimp area 30b and a seal 30c. The covering crimping area 30 a is an area covering the insulating covering 12 of the covered electric wire 10 . The conductor crimping area 30b is an area where the conductor 11 exposed from the covered wire 10 is connected. The sealing portion 30c is a part on one end side where the front side of the conductor crimping range 30b is crushed and sealed. In the second embodiment, the sealing portion 30c is configured with a recessed sealing portion 33 . The recessed sealing portion 33 is sealed, and is formed in a substantially U-shaped cross section that is wide in the width direction Y when viewed from the front side in the longitudinal direction X, for example. The tubular connecting portion 30 is formed into a generally tubular shape when viewed from the rear by rolling the barrel-constituting piece 32 and welding the opposing ends of the barrel-constituting piece 32 against each other. In addition, in the second embodiment, the sealing portion 30c may not necessarily be provided, and for example, the front side of the conductor crimping range 30b may be open.

(Manufacturing method of electric wire with terminal)
First, the conductor exposed portion 112 is exposed at the tip of the conductor 11 by removing the insulating coating 12 at the tip of the covered wire 10 . Also, a slit 121 is formed in the vicinity of the tip portion of the insulating coating 12 on the conductor exposed portion 112 side. Next, the exposed conductor portion 112 and the insulating coating 12 are molded to reduce the flatness so as to conform to the internal shapes of the conductor crimping area 30b and the covering crimping area 30a, and the covered wire 10 is formed in the conductor crimping area 30b and the covering crimping area 30a. insert The covered wire 10 is inserted so that the central axis of the covered wire 10 is parallel to the longitudinal direction X of the tubular connection portion 30 . At this time, the end of the exposed conductor portion 112 along the longitudinal direction X is inserted so that the position of the tip of the exposed conductor portion 112 is behind the sealed portion 30c of the tubular connection portion 30 . When the front side of the conductor crimping area 30b is inserted into the open crimp terminal 20A, the position of the tip of the exposed conductor portion 112 along the longitudinal direction X is near the front end of the conductor crimping area 30b in the tubular connecting portion 30. It should be inserted as far as possible.

Next, a pressure is applied to the outer circumference of the crimp terminal 20A to perform a crimping step of crimping and crimping the crimp terminal 20A to the exposed conductor portion 112 and a part of the insulating coating 12 . As a result, the crimp terminal 20A is crimped at the conductor crimping range 30b and the coating crimping range 30a of the tubular connection portion 30. As shown in FIG. That is, the inner surface of the conductor crimping area 30b is in contact with the conductor exposed portion 112 and wraps the conductor 11, and the coating crimping area 30a wraps a part of the insulating coating 12 so as to be crimped and connected. The electric wire 2 with a terminal is completed by the above.

Also in the second embodiment, it is possible to employ the slits 122 to 128 and the coated electric wires 10B to 10H according to the first to seventh modifications described above.

According to the second embodiment, effects similar to those of the first embodiment can be obtained.

Although the embodiments of the present invention have been specifically described above, the present invention is not limited to the above-described embodiments, and various modifications based on the technical idea of the present invention are possible. The present invention also includes those configured by appropriately combining the respective constituent elements described above. Further effects and modifications can be easily derived by those skilled in the art. Accordingly, the broader aspects of the invention are not limited to the above-described embodiments, and various modifications are possible. For example, the numerical values and materials given in the above-described embodiments are merely examples, and different numerical values and materials may be used as necessary, and the present invention is part of the disclosure of the present invention according to the embodiments. should not be limited by the description and drawings which constitute the

1, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 2 Wires with terminals 10, 10B, 10C, 10D, 10E, 10F, 10G, 10H Covered wire 11 Conductor 12 Insulation coating 20, 20A Crimp terminal 22 Transition part 23 Wire barrel 23a Surface 23b Serration 24 Insulation barrel 30 Tubular connecting portion 30a Coated crimping range 30b Conductor crimping range 30c Sealing portion 32 Barrel component piece 33 Concave sealing portion 111 Wire 112 Conductor exposed portion 121, 122, 123, 124 , 125, 126, 126a, 126b, 127, 128 slit

Claims (11)

A flat coated electric wire having a conductor portion composed of a plurality of strands and an insulating coating covering the conductor portion;
a crimp terminal to which the conductor portion is crimp-connected while the insulating coating and the conductor exposed portion exposed from the insulating coating are crimped;
In the vicinity of the crimp terminal side of the covered wire, the insulating coating is crimped so that one of the side surfaces substantially perpendicular to the flat surface of the covered wire is on the bottom side of the crimp terminal,
An electric wire with a terminal, wherein a break is provided in the insulating coating in the vicinity of the conductor exposed portion of the covered electric wire. The electric wire with a terminal according to claim 1, wherein the cut is provided in a flat portion of the insulating coating. The electric wire with a terminal according to claim 1 or 2, wherein the cut is provided on a side portion of the portion where the insulating coating is flat. The electric wire with a terminal according to any one of claims 1 to 3, wherein a plurality of cuts are provided in the insulating coating. The electric wire with a terminal according to any one of claims 1 to 4, wherein the cut is provided along the longitudinal direction of the covered electric wire. The electric wire with a terminal according to any one of claims 1 to 5, wherein the cut is provided at a predetermined angle with respect to the longitudinal direction of the covered electric wire. The electric wire with a terminal according to any one of claims 1 to 6, wherein the cut has at least one shape of a straight line, a wave shape, and a zigzag shape. 8. The terminal according to any one of claims 1 to 7, wherein the insulating coating at the cut portion is overlapped in the vicinity of the portion where the exposed conductor portion is crimped by the crimp terminal. Wire with. 2. The crimp terminal is an open barrel type terminal having a wire barrel for crimping connection by rolling the exposed conductor portion, and an insulation barrel for crimping connection by rolling the insulation coating. 9. The electric wire with a terminal according to any one of 1 to 8. The electric wire with a terminal according to claim 9, wherein at least one of the wire barrel and the insulation barrel has a zigzag shape or a zigzag shape. A flat covered electric wire having a conductor portion composed of a plurality of strands and an insulating coating covering the conductor portion is cut off from the insulating coating at one end to expose the conductor portion. forming a portion;
a step of forming a cut by partially incising the insulating coating in the vicinity of the side of the insulating coating on which the exposed conductor portion is formed;
a step of reducing the diameter of the coated electric wire by overlapping the insulating coating at the cut portion or by narrowing the cut;
and a step of reducing the oblateness of the exposed conductor portion and the insulating coating, housing the exposed conductor portion and the insulating coating in a crimp terminal, and crimping and connecting the housed exposed conductor portion and the insulating coating by crimping with the crimp terminal. A method for manufacturing an electric wire with a terminal.

Images