JP5830479B2 - Wire harness - Google Patents

Description

  The present invention relates to a wire harness used in an automobile or the like.

  Conventionally, in the fields of automobiles, OA equipment, home appliances, and the like, wire harnesses in which conductive wires having excellent electric conductivity are used as power lines and signal lines are known. The wire harness includes a crimp terminal that is attached to an electric wire and used for connection to other devices. The electric wire has a covering portion coated with an insulator and an exposed portion of the conductor portion where the core wire is exposed from the tip of the covering portion, and the crimping terminal is crimped to each of the covering portion and the exposed portion, thereby providing conductivity. The wire harness is configured. From the viewpoint of weight reduction, an electric wire using aluminum as a core wire material is attracting attention. As the crimp terminal, copper having excellent electrical characteristics is often used.

  For example, when moisture adheres to a contact portion of different metals such as aluminum and copper, so-called galvanic corrosion may occur due to a difference in standard electrode potential. In particular, since the standard electrode potential difference between aluminum and copper is large, corrosion on the aluminum side, which is electrically base, proceeds. For this reason, the connection state between the core wire and the crimp terminal becomes unstable, and there is a risk that an increase in contact resistance or an increase in electrical resistance due to a decrease in the wire diameter, or a disconnection, leading to malfunction of an electrical component or a malfunction.

  Among such wire harnesses in contact with different types of metals, there is one in which a resin material is filled so as to cover a connection portion between an electric wire and a crimp terminal (Patent Document 1). By filling the resin material, moisture is prevented from adhering to the contact portion between the electric wire and the crimp terminal.

JP 2004-111058 A

  However, in the method of Patent Document 1, since the resin material must be separately filled, the manufacturing process becomes complicated, and accordingly, the management in the manufacturing process becomes complicated. In addition, the cost of the entire wire harness increases due to the complexity of the process. Therefore, a water stop method that does not use a resin material is desired.

  The present invention has been made in view of such a problem, and can prevent moisture from adhering to a contact portion with an electric wire without using a resin material, and can simplify the manufacturing process. An object is to provide a simple wire harness.

In order to achieve the above-described object, the present invention provides an electric wire having an insulating coating portion in which a conductive core wire is coated with an insulator, a core wire exposed portion in which the core wire is exposed from a longitudinal tip of the insulating coating portion, and the insulation A wire harness including a coated crimping portion to be crimped to a covering portion and a crimp terminal having a core wire crimping portion to be crimped to the core wire exposed portion, wherein the core wire crimping portion and the coated crimping portion are such that the electric wire is the longitudinal The crimp terminal is located on the opposite side of the core crimping part from the coated crimping part, and the hollow inner surfaces are watertight to each other. And a protruding strip provided on the covering crimping portion and projecting inward in the radial direction. The protruding strip has a dimension in the longitudinal direction equal to or less than a thickness dimension of the insulator. Te, wherein the convex portions, Serial provided annularly in the circumferential direction of the insulation crimp portion, said spaced apart in the longitudinal direction of the insulation crimp portion 2 provided in the longitudinal direction of the separation dimension of the insulation crimp portion of two of the convex portions the insulator It is a wire harness characterized by being 5 times or less of the thickness dimension .

  Of the two ridges, the radial dimension of the ridge located on the sealing part side is larger than the radial dimension of the ridge located on the opening side of the covering crimping part. May be.

Of the two ridges, the radial dimension of the ridge located on the opening side of the covering crimping part is larger than the radial dimension of the ridge located on the sealing part side. May be.

  The core wire may be made of an aluminum material, and the core wire crimping portion may be made of a copper material.

  According to the present invention, since the core wire crimping portion of the crimp terminal is crimped to the core exposed portion of the electric wire, the coating crimping portion is crimped to the insulating coating portion, and further, the protruding portion is provided on the coating crimping portion. Therefore, it is possible to prevent moisture from entering and prevent moisture from adhering to the contact portion between the electric wire and the crimp terminal. Further, the manufacturing process can be simplified correspondingly, and the cost increase correspondingly can be suppressed.

  Moreover, since the protruding portion is provided in a ring shape in the circumferential direction of the insulating coating portion, it can be kept watertight in the entire circumferential direction.

  Moreover, since it decided to provide two protrusions in a longitudinal direction, watertightness can be ensured much more.

  ADVANTAGE OF THE INVENTION According to this invention, the adhesion of the water | moisture content to a contact part with an electric wire can be prevented without using a resin material, and the wire harness which can aim at the simplification of a manufacturing process can be provided.

The disassembled perspective view which shows the wire harness of 1st Embodiment. II-II sectional view taken on the line of FIG. The perspective view of the wire harness after crimping | compression-bonding. IV-IV sectional view taken on the line of FIG. Explanatory drawing of the crimping method of a wire harness. Sectional drawing when a crimping blade type | mold is cut | disconnected by the large diameter part. It is an enlarged view of the part enclosed with VII of FIG. 6, Comprising: Explanatory drawing which shows the time of crimping | bonding of a wire harness. It is the elements on larger scale of a wire harness, Comprising: Sectional drawing when it cut | disconnects by a covering crimping part. FIG. 5 is a partially enlarged view in the vicinity of the coated crimping portion in FIG. 4, and is a cross-sectional view when an electric wire insulator is also cut. The perspective view of the wire harness of 2nd Embodiment. XI-XI sectional view taken on the line of FIG. FIG. 12 is a partially enlarged view of the vicinity of the cover crimping portion in FIG. 11, and is a cross-sectional view when the electric wire insulator is also cut. Outline explanatory drawing of an experimental method.

<First Embodiment>
1 is an exploded perspective view of the wire harness 1 and shows a state before caulking, and FIG. 2 is a cross-sectional view taken along line II-II in FIG. The wire harness 1 has a longitudinal direction X and a width direction Y orthogonal to the longitudinal direction X, and includes an electric wire 10 and a crimp terminal 20. The electric wire 10 includes an insulation coating portion 12 in which a conductive core wire 16 is covered with an insulator 15 and a core wire exposure portion 11 in which a part of the core wire 16 is exposed from the distal end in the longitudinal direction X of the insulation coating portion 12. The core wire 16 is made of an aluminum-based material such as aluminum or an aluminum alloy, and more specifically, is formed by twisting a plurality of aluminum alloy wires or the like.

  The crimp terminal 20 extends in the longitudinal direction X, and is a crimp that allows insertion of a male connector (not shown) located at the front end 20A in the longitudinal direction X and a wire 10 located at the rear end 20B. Part 22. The box portion 21 includes an elastic contact piece 21A that comes into contact with the insertion tab of the male connector.

  The crimping part 22 includes a core crimping part 23 and a covering crimping part 24. The core wire crimping part 23 is located between the covering crimping part 24 and the box part 21. The cover crimping part 24 has a hollow cross section extending in the longitudinal direction X so that the electric wire 10 can be inserted from the rear end part 20B while opening to the rear end part 20B. The crimping terminal 20 is formed by punching a copper alloy strip such as brass whose surface is tin-plated into a flattened terminal shape (not shown), and then forming a box portion 21 of a hollow quadrangular prism body and a crimping portion 22 of a hollow cylindrical body. It is formed by bending into a three-dimensional terminal shape composed of Furthermore, between the box part 21 and the crimping | compression-bonding part 22, the sealing part 26 which made the hollow inner surface contact mutually watertight is provided. The sealing portion 26 is formed by bringing the inner surfaces of the crimping portion 22 into contact with each other and being joined in a watertight manner. As such a joining method, for example, pressure bonding or laser welding can be used.

  The crimping part 22 is joined in a watertight manner by a joining part 29 extending in the longitudinal direction X. Specifically, the end portions of the copper alloy strip punched into the terminal shape can be butted together so as to form a hollow shape, and the joined portion 29 can be formed by welding such as laser welding.

  In the pressure-bonding part 22 as described above, the covering pressure-bonding part 24 is formed with a ridge part 25 protruding inward in the radial direction. The ridge portion 25 is formed in an annular shape in the circumferential direction of the covering crimp portion 24.

  FIG. 3 shows the crimping terminal 20 and the core crimping part 23 and the covering crimping part 24 crimped inward in the radial direction after inserting the electric wire 10, and FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3. . The electric wire 10 is inserted so that the core wire exposed portion 11 of the electric wire 10 is located in the core wire crimping portion 23 and the insulating coating portion 12 is located in the covering crimping portion 24. The dimension in the longitudinal direction X of the crimping part 22 is larger than the dimension in the longitudinal direction X of the core wire exposed part 11. Therefore, when the electric wire 10 is inserted into the crimping portion 22, the core wire exposed portion 11 and the insulating coating portion 12 are positioned to face the inner periphery of the crimping portion 22.

  By crimping the crimping part 22 with the core wire exposed part 11 and the insulation coating part 12 inserted into the crimping part 22, the core wire crimping part 23 and the core wire 16 of the core wire exposing part 11 are crimped and insulated from the coating crimping part 24. The insulator 15 of the covering portion 12 is pressure bonded.

  Since the protruding crimp portion 24 is provided in the covering crimping portion 24, when the crimping portion 22 is caulked, a part of the insulating coating portion 12 is crimped by the protruding stripe portion 25 with a stronger force than the other portions, and the insulating coating is formed. A high pressure bonding portion 13 is formed on the insulator 15 of the portion 12.

  FIG. 5 is an explanatory diagram of a method for crimping the wire harness 1. As illustrated, the core crimping portion 23 and the covering crimping portion 24 can be crimped by the crimping tool 30. The crimping tool 30 includes an upper blade mold 31 and a lower blade mold 32. The upper blade mold 31 has a semi-cylindrical cavity extending in the longitudinal direction X, and has a large-diameter portion 34 corresponding to the coated crimping portion 24, a radius corresponding to the core wire crimping portion 23 and smaller than the large-diameter portion 34. A small-diameter portion 33. Both the small diameter portion 33 and the large diameter portion 34 have a diameter smaller than the diameter of the crimping portion 22 before caulking. The lower blade mold 32 has a semi-cylindrical cavity extending in the longitudinal direction X, and any part corresponding to the core wire crimping part 23 and the covering crimping part 24 has the same radius.

  FIG. 6 is a cross-sectional view of the large diameter portion 34 of the crimping tool 30. The lower blade mold 32 in a state of being engaged with the upper blade mold 31 is indicated by a virtual line. As shown in the drawing, the radius of the lower blade mold 32 is slightly smaller than the radius of the large diameter portion 34 of the upper blade mold 31, and when the wire harness 1 is crimped with the crimping tool 30, the upper blade mold is used. The lower blade mold 32 meshes with the inner side of 31. In this engaged state, the inner surface of the upper blade mold 31 and the inner surface of the lower blade mold 32 are substantially circular. Since the diameter at this time is smaller than the cover crimping part 24 before caulking, it is pressed so as to reduce the diameter of the cover crimping part 24 by caulking, Can be crimped.

  Although not shown, the diameter of the space formed by the inner surface of the small-diameter portion 33 of the upper blade die 31 and the inner surface of the lower blade die 32 is smaller than the diameter of the core wire crimping portion 23 and is not added. It is smaller than the diameter of the coated crimping part 24 after tightening. Therefore, the core wire crimping portion 23 is stronger than the covering crimping portion 24.

  When the upper blade mold 31 and the lower blade mold 32 of the crimping tool 30 are engaged with each other, a hollow cylindrical shape extending in the longitudinal direction X is formed by the small diameter portion 33, but the shape is not limited to this. As long as the crimp terminal 20 and the core wire exposed portion 11 of the electric wire 10 are crimped, various shapes can be employed. For example, a flat thing may be sufficient and the cross-sectional shape may become convex shape.

  FIG. 7 shows an electric wire 10 and a crimp terminal 20 in an enlarged view of a portion surrounded by VII of the crimp tool 30 of FIG. A slight gap 35 is formed between the inner surface of the upper blade mold 31 and the outer surface of the lower blade mold 32 at the meshing portion of the upper blade mold 31 and the lower blade mold 32. There is a possibility that a stepped portion 36 may be formed in the cover crimping portion 24, moving toward the gap 35 so that the pressing force of the cover crimping portion 24 escapes. When the step portion 36 is formed in this way, the insulator 14 of the insulating coating portion 12 may also be formed with a recess 14 protruding radially outward, and the crimping force in this portion is reduced, and There is a concern that the water stoppage will be reduced.

  FIG. 8 is a perspective view when the vicinity of the cover crimping portion 24 of the wire harness 1 is enlarged. As described above, by using the crimping tool 30, there is a possibility that the stepped portion 36 and the recess 14 extending in the longitudinal direction X may be formed in the covering crimping portion 24 of the crimping terminal 20. By providing, at least one part of the step part 36 and the hollow 14 can be pressed to radial inside. Therefore, at least at the position where the ridge portion 25 is provided, a decrease in the crimping force can be prevented, and moisture can be reliably prevented from entering from the rear end portion 20B of the crimp terminal 20.

  FIG. 9 is an enlarged cross-sectional view of the ridge portion 25. In this embodiment, the dimension L1 in the longitudinal direction X of the ridge portion 25 is equal to or less than the thickness dimension L2 of the insulator 15 of the electric wire 10 in the portion not subjected to the pressing action at the crimping portion 22, and preferably It is below the thickness dimension of the insulator 15 in the part which has received the effect | action of a press. The thickness dimension L2 of the insulator 15 in the portion not subjected to the pressing action at the crimping portion 22 is the thickness dimension of the insulator 15 in the exposed portion that is not inserted into the crimping portion 22. In other words, it is the thickness dimension of the insulator 15 before crimping. Moreover, the thickness dimension of the insulator 15 in the part which is receiving the action of the pressing force of the crimping part 22 is a part inserted into the crimping part 22 and is the thickness dimension of the insulator 15 after the crimping. . The insulator 15 has a thickness dimension smaller than that before press-bonding by press-bonding the press-bonding portion 22.

  By making the ridges 25 have the dimensions as described above, the insulator 15 of the covering crimping portion 24 can be provided with the high crimping portion 13 in which a high crimping force acts in a ring shape in the circumferential direction. In particular, when the dimension in the longitudinal direction X of the ridge portion 25 is small, the ridge portion 25 protrudes so as to be substantially orthogonal to the insulator 15, and the insulator 15 having elasticity is bent sharply. Therefore, since the adhesive force between the insulator 15 and the ridge portion 25 is increased by the rapid bending, it is possible to prevent moisture from entering from the rear end portion 20B. In addition, since the insulator 15 is less likely to move in the longitudinal direction X, it is difficult for the electric wire 10 to be pulled out even when the electric wire 10 is pulled in the pulling direction from the rear end portion 20B. In addition, although it changes with the materials of the insulator 15, since the crimping | compression-bonding force may fall by aged deterioration if the dimension L1 of the protruding item | line part 25 is too small, it is desirable to change the dimension suitably.

  The radial dimension L3 of the ridge 25 is equal to or greater than the dimension L4 of the recess 14 formed in the insulating coating 12. The dimension L4 of the recess 14 is the diameter from the ideal outer surface 17 that is the outer surface of the ideal insulator 15 where the recess 14 is not formed, to the maximum point where the distance from the ideal outer surface 17 is the largest when the recess 14 is formed. It is the dimension in a direction (refer FIG. 7). Therefore, it is possible to prevent the depression 14 from being partially pressed completely by the ridges 25 and the crimping force from being lowered by the depression 14.

  In the insulation coating part 12, what is normally used in the field | area of this technique, such as the polyvinyl chloride (PVC) which has elasticity, and polyethylene, can be selected as the insulator 15 which covers the core wire 16. FIG.

  In the wire harness 1 as described above, the core wire 16 of the electric wire 10 is made of an aluminum-based material, and the core wire crimping portion 23 of the crimp terminal 20 is made of a copper-based material. Contact. There is a possibility of electrolytic corrosion due to moisture adhering at the part where the different metal contacts, but in this embodiment, it is possible to prevent the penetration of moisture into the crimping part 22 and thus prevent electrolytic corrosion. Can do. Further, according to this embodiment, even if a material normally used as the material of the insulator 15 is used, it is possible to reliably prevent moisture from entering the crimping portion 22.

  In this embodiment, the cross-sectional shape of the ridge portion 25 is substantially rectangular (see FIG. 9), but is not limited to this shape. The cross-sectional shape may be a semicircle, a polygon such as a triangle, or the like. Further, the cross-sectional shape of the radially inner portion of the ridge portion 25 may be inclined to an axis extending in parallel with the longitudinal direction X. That is, you may incline so that the diameter may become large toward the rear end part 20B side from the front end part 20A side. By inclining in this way, when the electric wire 10 is inserted from the rear end 20B side, it is relatively easy to insert, but it is difficult to move in the opposite direction, and the inserted electric wire 10 can be made difficult to come off.

  The crimping tool 30 is crimped from the periphery of the crimp terminal 20 by two blade molds of the upper blade mold 31 and the lower blade mold 32, but may have three or more blade molds. For example, when the crimping tool 30 having three blade types is used, there is a possibility that the three recesses 14 are formed in the insulator 15 of the insulating coating portion 12. However, it is possible to suppress a decrease in the pressure-bonding force in any of the recesses 14 by making the ridge portion 25 annular.

<Second Embodiment>
In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and detailed descriptions thereof are omitted. This embodiment is characterized in that two ridges are provided in the longitudinal direction X.

  FIG. 10 is a perspective view of the wire harness 1 of the second embodiment, showing a state after crimping, and FIG. 11 is a cross-sectional view taken along the line XI-XI of FIG. The covering crimping portion 24 is provided with protruding strip portions 25A and 25B. The ridges 25 </ b> A and 25 </ b> B are formed in an annular shape that is continuous in the circumferential direction of the crimping part 22. The ridge portions 25A and the ridge portions 25B are provided to be separated in the longitudinal direction X.

  FIG. 12 is an enlarged perspective view of the ridges 25A and 25B. The spacing dimension D1 between the protruding line part 25A and the protruding line part 25B is not more than 5 times the dimension D2 in the thickness direction of the insulator 15 of the electric wire 10. The separation dimension D <b> 1 is measured between the inner ends of the protruding ridge portions 25 </ b> A and the protruding ridge portions 25 </ b> B. In addition, the thickness dimension D2 of the insulator 15 refers to a dimension at a portion not subjected to the pressing action at the crimping portion 22. Specifically, it is the thickness dimension of the insulator 15 in the exposed portion that is not inserted into the crimping portion 22. In other words, it is the thickness dimension of the insulator 15 before crimping.

<Experimental example>
In the wire harness 1 as described above, air was sent from the insulation coating portion 12 of the electric wire 10 toward the crimp terminal 20, and an experiment was conducted as to whether air leaks from the rear end portion 20B. FIG. 13 shows an outline of the experimental method. In the experiment, the crimp terminal 20 that crimped the electric wire 10 was put in a water tank 41 containing water, and pressurized air was sent from the end of the electric wire 10 toward the crimp terminal 20 by the regulator 42. Pressurized air was discharged at 50 kpa for 30 seconds.

  As the wire harness 1, controls, samples 1 to 4 were prepared, and the number of each sample was n = 10. The control is a wire harness using the crimp terminal 20 in which the protruding crimp part is not provided in the coated crimp part 24. Sample 1 is a wire harness using a crimp terminal 20 in which the distance D1 between the two ridges 25A and 25B is eight times the thickness D2 of the insulator 15. Sample 2 is a wire harness using a crimp terminal 20 having a separation dimension D1 that is six times the thickness dimension D2 of the insulator 15. Sample 3 is a wire harness using a crimp terminal 20 having a separation dimension D1 that is five times the thickness dimension D2 of the insulator 15. Sample 4 is a wire harness using a crimp terminal 20 in which the separation dimension D1 is four times the thickness dimension D2 of the insulator 15. Sample 3 and sample 4 are wire harnesses according to this embodiment. Moreover, about the control | contrast, the wire harness heated for 24 hours at 120 degreeC and the wire harness which does not perform such a heating were prepared. In Samples 1 to 4, a wire harness heated at 120 ° C. for 24 hours and 120 hours and a wire harness without such heating were prepared. The wire harness 1 may be used in a high-temperature environment, and particularly when used in such a high-temperature environment, the elasticity of the insulator 15 is reduced, and the crimping portion 22 and the insulating coating portion 12 are separated. There exists a tendency for the crimping force between to fall. In this experiment, it is possible to confirm the durability of the use of the wire harness 1 in a high temperature environment.

  As shown in Table 1, enter “N” for those where there was no air leakage from the rear end 20B of the crimp terminal 20, and if there was a leak, enter the pressure at the time of leakage. doing. Air leakage was performed by visually checking the bubbles.

  In the control in which the ridges 25 were not provided, no air leakage was confirmed when no heat treatment was performed, but in the heat treatment for 24 hours, air leakage was confirmed at 1 KPa or less. In Samples 1 to 4, no air leakage was confirmed when no heat treatment was performed.

  In sample 1, in the heat treatment for 24 hours, no air leakage was confirmed in 7 samples, but air leakage was confirmed at a pressure of 30 KPa for one and two for 20 KPa. In the heat treatment for 120 hours, air leakage was confirmed at a pressure of 1 to 3 KPa in all cases.

  In sample 2, in the heat treatment for 24 hours, no air leakage was confirmed in eight samples, but one was confirmed to be air leakage at a pressure of 40 KPa and one was 50 KPa. In the heat treatment for 120 hours, no air leakage was confirmed in the five samples, but air leakage was confirmed in the remaining five samples at a pressure of 5 to 30 KPa.

  In Sample 3 and Sample 4, no air leakage was observed in either the 24-hour heat treatment or the 120-hour heat treatment. Therefore, even when the wire harness 1 is used in a high-temperature environment, the separation dimension D1 of the ridge portion 25 is not more than five times the thickness dimension D2 of the insulator 15, In particular, it was proved that the inside of the core wire crimping portion 23 can be kept watertight. By setting the separation dimension D1 to be not more than 5 times the thickness dimension D2 of the insulator 15, the insulator 15 can penetrate into the separation portions in the longitudinal direction X of the protruding strip portion 25A and the protruding strip portion 25B. It is assumed that water tightness is improved.

  As described above, by making the separation dimension D1 of the protrusions 25A and 25B 5 times or less the thickness dimension D2 of the insulator 15, it is ensured that moisture enters from the rear end portion 20B to the box portion 21 side. Can be prevented. That is, the core wire crimping part 23 can be kept watertight. Therefore, electrolytic corrosion due to contact between the core wire 16 and the crimp terminal 20 can be reliably prevented.

  In 2nd Embodiment, the dimension of the radial direction of the two protruding item | line parts 25A and 25B is made comparable. However, they may have different dimensions. The electric wire 10 can be easily inserted by making the ridge portion 25A located on the box portion 21 side larger than the ridge portion 25B located on the rear end portion 20B side. In addition, by making the ridge portion 25B larger than the ridge portion 25A, the bendability of the core wire exposed portion 11 can be maintained and the crimped state to the core wire crimp portion 23 can be maintained.

  Although the cross-sectional shape of the ridge portions 25A and 25B is substantially rectangular, it is not limited to this shape. For example, the cross-sectional shape may be a polygon such as a circle or a triangle. Moreover, the cross-sectional shape may differ by 25 A of protruding item | line parts, and the protruding item | line part 25B.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs.

DESCRIPTION OF SYMBOLS 1 ... Wire harness 10 ... Electric wire 11 ... Core wire exposed part 12 ... Insulation coating | cover part 15 ... Insulator 16 ... Core wire 20 ... Crimp terminal 21 ... Box part 22 ... Crimp part 23 ... Core wire crimp part 24 ... Cover crimp part 25 ... Convex strip Portion 25A ... ridge portion 25B ... ridge portion 26 ... sealing portion X ... longitudinal direction Y ... width direction

Claims (4)

An electric wire having an insulation coating portion in which a conductive core wire is coated with an insulator, and a core wire exposure portion in which the core wire is exposed from the longitudinal tip of the insulation coating portion, and a coating crimp portion and the core wire to be crimped to the insulation coating portion A wire harness including a crimp terminal having a core crimp part to be crimped to the exposed part,
The core wire crimping part and the covering crimping part have a hollow cross-sectional shape that allows the electric wire to be inserted in the longitudinal direction and is watertight in the circumferential direction,
The crimp terminal is located on the opposite side of the core crimping portion from the coated crimping portion, and a sealing portion in which the hollow inner surfaces are watertight with each other;
Provided with a protruding strip provided on the coated crimping portion and projecting radially inward,
The protruding line portion has a dimension in the longitudinal direction equal to or less than a thickness dimension of the insulator,
The ridges are provided annularly in the circumferential direction of the coated crimping part, and are provided two apart in the longitudinal direction of the coated crimped part ,
The wire harness characterized in that the distance between the two protruding strips in the longitudinal direction of the coated crimping part is not more than five times the thickness of the insulator . Of the two ridges, the radial dimension of the ridge located on the sealing part side is larger than the radial dimension of the ridge located on the opening side of the coated crimping part. claim 1, wherein the wire harness, characterized in that. Of the two ridges, the radial dimension of the ridge located on the opening side of the covering crimping part is larger than the radial dimension of the ridge located on the sealing part side. claim 1, wherein the wire harness, characterized in that. The wire harness according to any one of claims 1 to 3, wherein the core wire is made of an aluminum-based material, and the core wire crimping portion is made of a copper-based material.

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