阅读说明：本技术 线束 (Wire harness ) 是由 伊泽克俊 林将志 于 2020-01-06 设计创作，主要内容包括：线束(10)具有电线(20)、与电线(20)的芯线电连接的连接端子(30)、以及将芯线与连接端子(30)的连接部分覆盖的筒状的收缩管(50)。在收缩管(50)的外周面打印有判别图形(60),判别图形(60)包括能判别收缩管(50)的径向上的收缩率的第1判别图形(61)。(A wire harness (10) is provided with an electric wire (20), a connection terminal (30) electrically connected to the core wire of the electric wire (20), and a tubular shrink tube (50) covering the connection portion between the core wire and the connection terminal (30). A discrimination pattern (60) is printed on the outer peripheral surface of the shrinkable tube (50), and the discrimination pattern (60) includes a 1 st discrimination pattern (61) capable of discriminating the shrinkage ratio of the shrinkable tube (50) in the radial direction.)

1. A wire harness has:

a 1 st conductor;

a 2 nd conductor electrically connected to the 1 st conductor; and

a cylindrical shrink tube covering a connection portion of the 1 st conductor and the 2 nd conductor,

and the outer peripheral surface of the shrinkage pipe is printed with a distinguishing pattern, and the distinguishing pattern comprises a 1 st distinguishing pattern which can distinguish the shrinkage rate of the shrinkage pipe in the radial direction.

2. The wire harness according to claim 1, wherein the discrimination figure includes a 2 nd discrimination figure that can discriminate a shrinkage rate in a length direction of the shrinkage tube.

3. The wire harness according to claim 2, wherein the 1 st discrimination pattern is a pattern in which a plurality of 1 st patterns extending in a longitudinal direction of the shrink tube are printed at equal intervals in a circumferential direction of the shrink tube,

the 2 nd discrimination pattern is a pattern in which a plurality of 2 nd patterns extending in the circumferential direction of the shrink tube are printed at equal intervals in the longitudinal direction of the shrink tube.

4. The wire harness according to any one of claims 1 to 3, wherein the discrimination pattern is printed on an entire outer peripheral surface of the shrink tube.

5. The wire harness according to any one of claims 1 to 4, wherein the 1 st conductor is a core wire of an electric wire having a core wire and an insulating coating portion that coats an outer periphery of the core wire,

the 2 nd conductor is a metal connection terminal,

the core wire exposed from the insulating coating portion is electrically connected to the connection terminal,

the shrink tube is formed so as to cover an end portion from a connecting portion of the core wire and the connection terminal to the insulating cover portion.

6. The wire harness according to any one of claims 1 to 4, wherein the 1 st conductor is the 1 st core wire of a 1 st wire having a 1 st core wire and a 1 st insulating coating that coats an outer periphery of the 1 st core wire,

the 2 nd conductor is the 2 nd core wire of a 2 nd electric wire having a 2 nd core wire and a 2 nd insulating coating portion coating an outer periphery of the 2 nd core wire,

the 1 st core wire exposed from the end of the 1 st insulating coating and the 2 nd core wire exposed from the end of the 2 nd insulating coating are electrically connected,

the shrink tube is formed so as to cover from an end of the 1 st insulating cover to an end of the 2 nd insulating cover.

7. The wire harness according to claim 6, wherein an inner peripheral surface of one end portion of the shrink tube is bonded to an outer peripheral surface of an end portion of the 1 st insulating cover portion by welding,

an inner peripheral surface of the other end portion of the shrink tube is bonded to an outer peripheral surface of the end portion of the 2 nd insulating coating portion by welding.

8. The wire harness according to any one of claims 1 to 6, wherein the shrink tube has a laminated structure including a heat shrink tube and an adhesive layer formed on an inner peripheral surface of the heat shrink tube.

Technical Field

The present disclosure relates to wire harnesses.

Background

Conventionally, a wire harness used in a vehicle is known in which an end portion of a core wire of a covered wire and a connection terminal made of metal are electrically connected (for example, see patent document 1). In such a wire harness, in order to perform insulation protection of a connection portion of the core wire and the connection terminal, the connection portion is covered with a heat shrinkable tube. In addition, the connection terminal is connected to an electrical device of the vehicle.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2014-49334

Disclosure of Invention

Problems to be solved by the invention

However, when the heat shrinkable tube is excessively shrunk, for example, the heat shrinkable tube is pressed against a corner portion of the connection portion, and the heat shrinkable tube may be damaged. When the heat shrinkable tube is broken, the quality of the wire harness is degraded, such as degradation of insulation reliability.

Therefore, an object is to provide a wire harness capable of suppressing a decrease in quality.

Means for solving the problems

The disclosed wire harness has: a 1 st conductor; a 2 nd conductor electrically connected to the 1 st conductor; and a tubular shrink tube covering a connection portion between the 1 st conductor and the 2 nd conductor, wherein a discrimination pattern is printed on an outer peripheral surface of the shrink tube, and the discrimination pattern includes a 1 st discrimination pattern capable of discriminating a shrinkage rate of the shrink tube in a radial direction.

Effects of the invention

According to the wire harness of the present disclosure, an effect is obtained in which a decrease in quality can be suppressed.

Drawings

Fig. 1 is a schematic configuration diagram showing a wire harness according to an embodiment.

Fig. 2 is a schematic cross-sectional view illustrating a wire harness of an embodiment.

Fig. 3 is a schematic side view showing a wire harness of an embodiment.

Fig. 4A is a schematic perspective view illustrating a method of manufacturing a wire harness according to an embodiment.

Fig. 4B is a schematic cross-sectional view illustrating a manufacturing method of a wire harness according to an embodiment.

Fig. 4C is a schematic side view illustrating a method of manufacturing a wire harness according to an embodiment.

Fig. 5 is a schematic cross-sectional view of a wire harness showing a modification.

Fig. 6 is a schematic side view of a wire harness showing a modification.

Fig. 7 is a schematic perspective view showing a shrink tube according to a modification.

Fig. 8 is a schematic perspective view showing a shrink tube of a modification.

Fig. 9 is a schematic perspective view showing a shrink tube of a modification.

Fig. 10 is a schematic perspective view showing a shrink tube of a modification.

Detailed Description

[ description of embodiments of the present disclosure ]

First, embodiments of the present disclosure will be described.

[1] The disclosed wire harness has: a 1 st conductor; a 2 nd conductor electrically connected to the 1 st conductor; and a tubular shrink tube covering a connection portion between the 1 st conductor and the 2 nd conductor, wherein a discrimination pattern is printed on an outer peripheral surface of the shrink tube, and the discrimination pattern includes a 1 st discrimination pattern capable of discriminating a shrinkage rate of the shrink tube in a radial direction.

According to this configuration, the shrinkage rate in the radial direction of the shrinkable tube can be discriminated by the 1 st discrimination pattern of the discrimination patterns. Therefore, based on the 1 st discrimination pattern, it is possible to easily discriminate a wire harness having an excessive shrinkage rate in the radial direction of the shrink tube or a wire harness having an insufficient shrinkage rate in the radial direction of the shrink tube. Accordingly, the insulation reliability and the water stopping performance of the connection portion can be visually recognized by the 1 st discrimination pattern, and thus the deterioration of the quality of the wire harness can be suppressed. Further, since a leak test for evaluating the water stopping property of the shrinkage tube can be omitted, the workability of assembling the wire harness can be improved.

[2] Preferably, the determination pattern includes a 2 nd determination pattern that can determine a shrinkage rate in a longitudinal direction of the shrink tube.

According to this configuration, the shrinkage rate in the longitudinal direction of the shrinkable tube can be discriminated by the 2 nd discrimination pattern of the discrimination patterns. Therefore, based on the 2 nd discrimination figure, it is possible to easily discriminate a wire harness having an excessive shrinkage rate in the longitudinal direction of the shrinkable tube or a wire harness having an insufficient shrinkage rate in the longitudinal direction of the shrinkable tube.

[3] The 1 st discrimination pattern is a pattern in which a plurality of 1 st patterns extending in the longitudinal direction of the shrink tube are printed at equal intervals in the circumferential direction of the shrink tube, and the 2 nd discrimination pattern is a pattern in which a plurality of 2 nd patterns extending in the circumferential direction of the shrink tube are printed at equal intervals in the longitudinal direction of the shrink tube.

According to this configuration, the shrinkage rate in the radial direction of the shrinkable tube can be determined by measuring how much the interval between adjacent 1 st patterns is narrowed in the shrinkable tube after shrinkage compared to before shrinkage. In addition, the shrinkage rate in the longitudinal direction of the shrinkable tube can be determined by measuring how much the interval between adjacent 2 nd patterns is narrowed in the shrinkable tube after shrinkage compared with that before shrinkage.

[4] Preferably, the discrimination pattern is printed on the entire outer peripheral surface of the shrink tube. With this configuration, the shrinkage rate of the shrinkable tube can be determined over the entire circumference in the circumferential direction and the entire length in the longitudinal direction of the shrinkable tube.

[5] The 1 st conductor is a core wire of an electric wire having a core wire and an insulating coating portion coating an outer periphery of the core wire, the 2 nd conductor is a connection terminal made of metal, the core wire exposed from the insulating coating portion is electrically connected to the connection terminal, and the shrink tube is formed so as to coat an end portion of the insulating coating portion from a connection portion of the core wire and the connection terminal.

According to this structure, the connection portion of the core wire and the connection terminal can be insulation-protected by the shrink tube. Therefore, the insulation reliability and water stopping performance of the connection portion between the core wire and the connection terminal can be visually recognized by the discrimination pattern printed on the shrink tube.

[6] Preferably, the 1 st conductor is the 1 st core wire of a 1 st wire having a 1 st core wire and a 1 st insulating coating portion that coats an outer periphery of the 1 st core wire, the 2 nd conductor is the 2 nd core wire of a 2 nd wire having a 2 nd core wire and a 2 nd insulating coating portion that coats an outer periphery of the 2 nd core wire, the 1 st core wire exposed from an end portion of the 1 st insulating coating portion and the 2 nd core wire exposed from an end portion of the 2 nd insulating coating portion are electrically connected, and the shrink tube is formed so as to coat from an end portion of the 1 st insulating coating portion to an end portion of the 2 nd insulating coating portion.

According to this structure, the connection portion of the 1 st core wire and the 2 nd core wire can be insulation-protected by the shrink tube. Therefore, the insulation reliability and reliability of the connection portion between the 1 st core wire and the 2 nd core wire can be visually recognized by the discrimination pattern printed on the shrink tube.

[7] Preferably, an inner peripheral surface of one end portion of the shrink tube is bonded to an outer peripheral surface of the end portion of the 1 st insulating coating portion by welding, and an inner peripheral surface of the other end portion of the shrink tube is bonded to an outer peripheral surface of the end portion of the 2 nd insulating coating portion by welding.

According to this configuration, the gap between the shrinkable tube and the 1 st insulating cover is closed, and the gap between the shrinkable tube and the 2 nd insulating cover is closed. This can prevent liquid such as water from entering the inside of the shrinkable tube from between the shrinkable tube and the 1 st insulating coating portion and from between the shrinkable tube and the 2 nd insulating coating portion.

[8] Preferably, the heat shrinkable tube has a laminated structure including a heat shrinkable tube and an adhesive layer formed on an inner circumferential surface of the heat shrinkable tube.

According to this configuration, the adhesive layer formed on the inner peripheral surface of the heat shrinkable tube can improve the adhesion between the heat shrinkable tube and the insulating cover portion.

[ details of embodiments of the present disclosure ]

Specific examples of the wire harness according to the present disclosure will be described below with reference to the drawings. In the drawings, a part of the structure is sometimes shown enlarged or simplified for convenience of explanation. The dimensional ratios of the respective portions may differ from one another in the drawings. The present invention is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims. The term "orthogonal" in the present specification includes not only a case where the two are strictly orthogonal but also a case where the two are substantially orthogonal within a range where the operation and effect in the present embodiment are exerted.

The wire harness 10 shown in fig. 1 electrically connects two or more than three electrical devices (devices). Harness 10 is mounted on vehicle V such as a hybrid vehicle or an electric vehicle. The wire harness 10 electrically connects, for example, an inverter 11 provided at the front of the vehicle V and a high-voltage battery 12 provided behind the inverter 11 in the vehicle V. The wire harness 10 is routed so as to pass under the floor of a vehicle or the like, for example. The inverter 11 is connected to a motor (not shown) for driving wheels, which is a power source for running the vehicle. The inverter 11 generates ac power from the dc power of the high-voltage battery 12 and supplies the ac power to the motor. The high-voltage battery 12 is a battery capable of supplying a voltage of several hundred volts, for example.

The wire harness 10 includes one or a plurality of electric wires 20, a pair of connectors C1 attached to both end portions of the electric wires 20, and an exterior member 25 collectively surrounding the plurality of electric wires 20. One end of the electric wire 20 is connected to the inverter 11 via a connector C1, and the other end of the electric wire 20 is connected to the high-voltage battery 12 via a connector C1. The electric wire 20 is, for example, a high-voltage electric wire that can respond to high voltage and large current. The electric wire 20 may be, for example, a shielded electric wire having an electromagnetic shielding structure itself, or a non-shielded electric wire having no electromagnetic shielding structure itself.

The exterior member 25 has a long cylindrical shape as a whole. One or more electric wires 20 are housed in the internal space of the exterior member 25. The exterior member 25 is formed to surround the outer peripheries of the plurality of wires 20 over the entire circumferential direction, for example. The exterior member 25 protects the electric wire 20 housed therein from flying objects and water droplets. As the exterior member 25, for example, a metal or resin pipe, a resin protector, a flexible bellows tube formed of resin or the like, a rubber waterproof cover, or a combination thereof can be used.

(Structure of electric wire 20)

As shown in fig. 2, the electric wire 20 has a core wire 21 formed of a conductor and an insulating coating 22 coating the outer periphery of the core wire 21. As the core wire 21, for example, a stranded wire obtained by twisting a plurality of metal wire rods, a columnar conductor formed of one metal rod having a columnar shape with a solid structure inside, a tubular conductor having a hollow structure inside, or the like can be used. Further, as the core wire 21, a twisted wire, a columnar conductor, and a cylindrical conductor may be used in combination. Examples of the columnar conductor include a single core wire and a bus bar. The core wire 21 of the present embodiment is a stranded wire. As the material of the core wire 21, for example, a metal material such as copper-based or aluminum-based can be used. The core wire 21 is formed by extrusion molding, for example.

The cross-sectional shape of the core wire 21 cut by a plane orthogonal to the longitudinal direction of the core wire 21 can be any shape. That is, the cross-sectional shape of the core wire 21 can be any shape. The cross-sectional shape of the core wire 21 is formed into, for example, a circular, semicircular, polygonal, square, flat shape. The cross-sectional shape of the core wire 21 of the present embodiment is formed in a circular shape.

The insulating coating portion 22 coats the outer peripheral surface of the core wire 21 over the entire circumference in the circumferential direction, for example. The insulating coating 22 is made of an insulating material such as synthetic resin. As a material of the insulating coating portion 22, for example, a synthetic resin containing a polyolefin resin such as crosslinked polyethylene or crosslinked polypropylene as a main component can be used. As the material of the insulating coating portion 22, one material may be used alone, or two or more materials may be used in combination as appropriate. The insulating coating 22 can be formed by, for example, extrusion molding (extrusion coating) of the core wire 21.

In the present specification, the expression "main component" includes a meaning that other components are contained within a range not interfering with the function of the main component and a meaning that the content of the main component is 50 mass% or more unless otherwise specified.

At the end of the electric wire 20, the end of the core wire 21 is exposed from the insulating coating 22. For example, at the end of the electric wire 20, a certain length of the insulating coating 22 is peeled off from the tip of the electric wire 20, so that the end of the core wire 21 is exposed from the insulating coating 22.

In the following description, the term "circumferential direction" refers to a circumferential direction of the center axis of the electric wire 20.

As shown in fig. 2 and 3, the wire harness 10 includes a metal connection terminal 30 connected to an end of the electric wire 20, and a shrink tube 50 covering a connection portion 40 between the electric wire 20 and the connection terminal 30.

(Structure of connection terminal 30)

As shown in fig. 2, the connection terminal 30 includes a wire connection portion 31 connected to an end of the wire 20 and a terminal connection portion 32 connected to a counterpart terminal (not shown). The connection terminal 30 is, for example, a single member in which the wire connection portion 31 and the terminal connection portion 32 are integrally formed in connection. As a material of the connection terminal 30, for example, a metal material such as copper, a copper alloy, aluminum, an aluminum alloy, and stainless steel can be used. The connection terminal 30 may be subjected to surface treatment such as silver plating, tin plating, aluminum plating, or the like depending on the type of metal constituting the connection terminal and the use environment. The connection terminal 30 can be formed by, for example, pressing a metal plate having excellent conductivity. Examples of the mating terminal to which the terminal connecting portion 32 is connected include a bus bar, a terminal portion of an electrical device, and a terminal of another electric wire.

(Structure of wire connecting part 31)

The wire connecting portion 31 is electrically connected to the end of the wire 20. The wire connecting portion 31 is connected to, for example, an end portion of the core wire 21 exposed from the insulating cover 22. The wire connection portion 31 is connected to the core wire 21 by, for example, crimping, ultrasonic welding, or the like. Thereby, the wire connecting portion 31 and the core wire 21 are electrically connected.

(Structure of terminal connecting part 32)

The terminal connecting portion 32 is formed to be exposed from the shrink tube 50 and to protrude outward of the shrink tube 50. The terminal connecting portion 32 is formed in a flat plate shape, for example. A through hole 32X is formed in the terminal connecting portion 32, and a fixing member (not shown) such as a screw is inserted into the through hole 32X. The through-hole 32X is formed to penetrate the terminal connecting portion 32 in the plate thickness direction, for example. The terminal connecting portion 32 may be formed in other shapes such as a plate shape or a rod shape without the through-hole 32X.

(Structure of shrink tube 50)

The shrink tube 50 is formed in a long cylindrical shape, for example. The shrink tube 50 is formed, for example, in such a manner as to cover the electric wire connection portion 31 and the connection portion 40 of the core wire 21. The shrink tube 50 is formed to cover the core wire 21 exposed from the insulating coating 22, for example. The shrink tube 50 is formed, for example, in such a manner as to cover from the end of the insulating coating 22 to the connecting portion 40. The shrink tube 50 is formed to cover the wire connection portion 31 located closer to the terminal connection portion 32 than the connection portion 40, for example. For example, one end of the shrink tube 50 covers the outer peripheral surface of the end of the insulating coating portion 22, and the other end of the shrink tube 50 covers the outer peripheral surface of the wire connecting portion 31 of the connection terminal 30. The shrink tube 50 is formed so as to surround the outer peripheral surface of the end portion of the insulating cover 22 and the outer periphery of the connecting portion 40 over the entire circumferential direction.

(concrete Structure of shrink tube 50)

The heat shrinkable tube 50 of the present embodiment includes a heat shrinkable tube 51 having a cylindrical shape and an adhesive layer 52 formed on an inner peripheral surface of the heat shrinkable tube 51.

As shown in fig. 4A, the heat shrinkable tube 51 is, for example, a tube that has been formed into a cylindrical body (here, a cylindrical body) from a state before the connecting portion 40 is arranged inside the shrinkable tube 50. The heat shrinkable tube 51 is obtained by, for example, drawing a resin member formed into an ultrafine cylindrical shape by extrusion molding into a coarse cylindrical shape in a heated state, and then cooling the stretched resin member. The heat-shrinkable tube 51 thus obtained has a shape memory property of being shrunk to a thin tube shape before stretching when heated. As a material of the heat shrinkable tube 51, for example, a synthetic resin such as a polyolefin-based, polyester-based, nylon-based, silicone-based, or fluororesin-based resin can be used. As the material of the heat shrinkable tube 51, one material may be used alone, or two or more materials may be used in appropriate combination.

The adhesive layer 52 is formed in a cylindrical shape (cylindrical shape in this case) with a uniform thickness on the inner circumferential surface of the heat shrinkable tube 51, for example, in a state before the connection portion 40 is disposed inside the shrinkable tube 50. The adhesive layer 52 is formed over the entire circumference of the inner circumferential surface of the heat shrinkable tube 51 in the circumferential direction and the entire length in the longitudinal direction, for example. The adhesive layer 52 has an inner diameter larger than the outer diameter of the connecting portion 40 and the outer diameter of the insulating cover 22 before the end portions of the connecting portion 40 and the insulating cover 22 are arranged inside. As the adhesive layer 52, for example, a thermoplastic adhesive can be used. As the adhesive layer 52, for example, a modified olefin-based or polyester-based hot melt adhesive can be used. The material of the adhesive layer 52 is preferably the same resin material as the material constituting the insulating cover 22, for example. The material of the adhesive layer 52 is preferably the same resin material as the material of the heat shrinkable tube 51, for example. As the material of the adhesive layer 52, one material may be used alone, or two or more materials may be used in appropriate combination. The adhesive layer 52 is formed by, for example, melting by heating and then cooling and solidifying.

Next, the structure of the heat-shrinkable tube 51 and the adhesive layer 52 after heat shrinkage will be described with reference to fig. 2.

As shown in fig. 2, the heat shrinkable tube 51 is formed, for example, in such a manner as to cover from the end of the insulating cover 22 to the connection portion 40. The heat shrinkable tube 51 is formed to cover, for example, the wire connecting portion 31 located on the terminal connecting portion 32 side of the connecting portion 40 from the end of the insulating cover 22. The heat shrinkable tube 51 is formed so as to surround the entire circumferential surface of the outer peripheral surface of the end portion of the insulating cover 22 and the outer peripheral surface of the connecting portion 40, for example. The heat shrinkable tube 51 is formed to surround the entire circumference of the wire connection portion 31, for example. The heat shrinkable tube 51 has a step formed along, for example, the outer peripheral surface of the insulating cover 22 and the step formed by the core wire 21 exposed from the insulating cover 22, the connection portion 40, and the wire connection portion 31. For example, the heat shrinkable tube 51 is formed so that the outer diameter of the portion covering the connection portion 40 is smaller than the outer diameter of the portion covering the outer peripheral surface of the insulating cover 22. For example, the heat shrinkable tube 51 is formed so that the outer diameter of the portion covering the wire connecting portion 31 on the terminal connecting portion 32 side of the connecting portion 40 is smaller than the outer diameter of the portion covering the connecting portion 40.

One end portion in the longitudinal direction of the heat shrinkable tube 51 is bonded with an adhesive layer 52 over the entire circumferential direction of the outer peripheral surface of the end portion of the insulating cover 22, for example. For example, the adhesive layer 52 at one end portion in the longitudinal direction of the heat shrinkable tube 50 is bonded to the outer peripheral surface of the end portion of the insulating cover 22 over the entire circumferential direction without a gap, and is bonded to the inner peripheral surface of the heat shrinkable tube 51 over the entire circumferential direction without a gap. The other end portion in the longitudinal direction of the heat shrinkable tube 51 is bonded with the adhesive layer 52 over the entire circumference of the outer circumferential surface of the wire connection portion 31, for example. For example, the adhesive layer 52 at the other end portion in the longitudinal direction of the heat shrinkable tube 50 is bonded to the outer peripheral surface of the wire connection portion 31 over the entire circumference thereof without a gap, and is bonded to the inner peripheral surface of the heat shrinkable tube 51 over the entire circumference thereof without a gap. Thereby, the gap between the heat shrinkable tube 51 and the insulating cover 22 is closed, and the gap between the heat shrinkable tube 51 and the wire connection portion 31 is closed. Therefore, it is possible to prevent liquid such as water from entering the inside of the shrinkable tube 50 from both ends in the longitudinal direction of the shrinkable tube 50. As a result, the liquid can be inhibited from entering the connection portion 40 of the core wire 21 of the electric wire 20 and the electric wire connection portion 31 of the connection terminal 30. That is, the shrink tube 50 of the present embodiment has an insulation protection function of insulation-protecting the connection portion 40, and has a water stop function of stopping water at the connection portion 40.

The adhesive layer 52 is formed, for example, in the middle portion in the longitudinal direction of the heat shrinkable tube 50 so as to fill the gap between the inner peripheral surface of the heat shrinkable tube 51 and the outer peripheral surfaces of the core wires 21 and the wire connection portion 31. The adhesive layer 52 may be formed along the inner circumferential surface of the heat shrinkable tube 51 at the middle portion in the longitudinal direction of the shrinkable tube 50. The adhesive layer 52 may be formed to protrude outward from the end portion of the heat shrinkable tube 51 in the longitudinal direction.

As shown in fig. 3, a discrimination pattern 60 for discriminating the shrinkage ratio of the heat shrinkable tube 51 (shrinkable tube 50) is printed on the outer peripheral surface of the heat shrinkable tube 51. The discrimination pattern 60 of the present embodiment includes a 1 st discrimination pattern 61 capable of discriminating the shrinkage ratio of the heat shrinkable tube 51 in the radial direction and a 2 nd discrimination pattern 62 capable of discriminating the shrinkage ratio of the heat shrinkable tube 51 in the longitudinal direction.

The 1 st discrimination pattern 61 is, for example, a pattern in which a plurality of 1 st patterns 61A extending in the longitudinal direction of the heat shrinkable tube 51 are printed at equal intervals in the circumferential direction of the heat shrinkable tube 51. In the 1 st discrimination pattern 61, the degree of narrowing of the interval L1 between the adjacent 1 st patterns 61A after the shrinkage of the heat shrinkable tube 51 from that before the shrinkage of the heat shrinkable tube 51 is discriminated, whereby the shrinkage ratio in the radial direction of the heat shrinkable tube 51 can be discriminated.

The 2 nd discrimination pattern 62 is, for example, a pattern in which a plurality of 2 nd patterns 62A extending in the circumferential direction of the heat shrinkable tube 51 are printed at equal intervals in the longitudinal direction of the heat shrinkable tube 51. In the 2 nd determination pattern 62, the shrinkage rate in the longitudinal direction of the heat shrinkable tube 51 can be determined by determining how much the interval L2 of the adjacent 2 nd pattern 62A is narrowed after the heat shrinkable tube 51 is shrunk, compared with before the heat shrinkable tube 51 is shrunk.

The discrimination pattern 60 of the present embodiment is formed in a lattice shape as a whole by the 1 st discrimination pattern 61 and the 2 nd discrimination pattern 62. The discrimination pattern 60 (the 1 st discrimination pattern 61 and the 2 nd discrimination pattern 62) is printed on the outer peripheral surface of the heat shrinkable tube 51 by, for example, laser or printing.

(method of manufacturing wire harness 10)

Next, a method for manufacturing the wire harness 10 will be described with reference to fig. 4A to 4C.

First, in the step shown in fig. 4A, the electric wire 20 and the shrink tube 50 before shrinking, which are electrically connected to the end of the core wire 21 and the wire connection portion 31 of the connection terminal 30, are prepared. In the illustrated example, the wire connection portion 31 is connected to the core wire 21 by crimping. The shrinkable tube 50 before shrinking has a laminated structure including a heat shrinkable tube 51 having a cylindrical shape (here, a cylindrical shape) and a thermoplastic adhesive layer 52 formed on the inner peripheral surface of the heat shrinkable tube 51. The inner diameter of the shrinkable tube 50 before shrinking is formed to a size that can accommodate the insulating cover 22, the connection portion 40, and the wire connection portion 31 therein. Here, a discrimination pattern 60 including a 1 st discrimination pattern 61 and a 2 nd discrimination pattern 62 is printed on the outer peripheral surface of the heat shrinkable tube 51. For example, in the 1 st discrimination pattern 61 in the heat shrinkable tube 51 before shrinking, the interval between the adjacent 1 st patterns 61A is set to be the interval L1A. For example, in the 2 nd discrimination pattern 62 in the heat shrinkable tube 51 before shrinking, the interval between the adjacent 2 nd patterns 62A is set to the interval L2A.

Next, in the process shown in fig. 4B, the end of the electric wire 20 connected to the connection terminal 30 is inserted into the inside of the shrinkage tube 50. Specifically, the electric wire 20 connected to the connection terminal 30 is inserted into the shrinkable tube 50 such that the outer circumference of the end portion of the insulating cover 22, the outer circumference of the core wire 21 exposed from the insulating cover 22, the outer circumference of the connection portion 40, and the outer circumference of the electric wire connection portion 31 are surrounded by the shrinkable tube 50.

Next, the shrink tube 50 is subjected to heat treatment. For example, the shrink tube 50 is heated by a heater or the like. In this heating treatment, the shrinkable tube 50 is heated for a predetermined time at a heating temperature (for example, about 120 to 140 ℃) higher than the shrinkage temperature of the heat shrinkable tube 51 and lower than the melting temperature of the heat shrinkable tube 51. By this heat treatment, the heat shrinkable tube 51 shrinks in the radial direction and the longitudinal direction, and the thermoplastic adhesive layer 52 softens or melts, whereby the adhesive layer 52 exhibits adhesiveness. Thus, the heat shrinkable tube 51 is bonded to the outer peripheral surface of the end portion of the insulating cover 22 over the entire circumferential direction thereof with no gap by the adhesive layer 52, and is bonded to the outer peripheral surface of the wire connection portion 31 over the entire circumferential direction thereof with no gap by the adhesive layer 52. The contracted tube 50 can function as a water stop member for stopping the connection portion 40.

Here, if the heat shrinkable tube 51 is excessively shrunk by the heat treatment in this step, for example, the heat shrinkable tube 51 is pressed against the corner of the connection portion 40, and the heat shrinkable tube 51 is broken. On the other hand, when the heat shrinkable tube 51 is insufficiently shrunk by the heat treatment, the heat shrinkable tube 51 cannot be brought into close contact with the outer peripheral surface of the insulating cover 22 and the outer peripheral surface of the wire connecting portion 31. Therefore, when the heat-shrinkable tube 51 is insufficiently shrunk, a problem arises in that a desired water stopping performance cannot be obtained in the heat-shrinkable tube 51. In contrast, conventionally, the shrinkage ratio of the heat shrinkable tube 51 has been secured only by the production conditions of the heating temperature and the heating time in the heating treatment. However, in the conventional method, it is impossible to determine whether or not the actual shrinkage rate of the heat shrinkable tube 51 is the desired shrinkage rate. Therefore, for example, in the case of using the shrink tube 50 as the water stop member, it is necessary to perform a leak check for evaluating whether the shrink tube 50 has a desired water stop performance for all the wire harnesses 10 manufactured. Therefore, in the conventional wire harness, a large number of steps are required to ensure the water stopping performance in the shrinkable tube 50, and there is a problem that the manufacturing cost increases.

On the other hand, as shown in fig. 4C, in the wire harness 10 of the present embodiment, a determination pattern 60 capable of determining the shrinkage ratio of the shrink tube 50 is printed on the outer peripheral surface of the heat shrink tube 51 (shrink tube 50). Therefore, the shrinkage rate of the shrinkable tube 50 can be determined from the determination pattern 60 in the shrunk shrinkable tube 50.

As shown in fig. 4C, in the 1 st discrimination pattern 61 in the contracted tube 50 after contraction, the interval between the adjacent 1 st patterns 61A is a narrower interval L1 than the interval L1A before contraction (see fig. 4A). That is, the interval between the adjacent 1 st patterns 61A is narrowed as the heat shrinkable tube 51 shrinks in the radial direction, that is, the inner diameter of the heat shrinkable tube 51 is reduced. In the 2 nd discrimination pattern 62 in the contracted tube 50 after contraction, the interval between the adjacent 2 nd patterns 62A is a narrower interval L2 than the interval L2A before contraction (see fig. 4A). That is, the interval between the adjacent 2 nd patterns 62A is narrowed with the contraction of the heat shrinkable tube 51 in the longitudinal direction. At this time, the contraction rate in the radial direction of the contracted tube 50 can be determined based on the ratio L1/L1a of the interval L1a in the 1 st discrimination pattern 61 before contraction and the interval L1 in the 1 st discrimination pattern 61 after contraction. Further, the contraction rate in the longitudinal direction of the contracted tube 50 can be determined based on the ratio L2/L2a of the interval L2a in the 2 nd discrimination pattern 62 before contraction and the interval L2 in the 2 nd discrimination pattern 62 after contraction.

In the present embodiment, for example, the ratio L1/L1a and the ratio L2/L2a at the time of shrinkage of the shrinkable tube 50 at a desired shrinkage rate are determined in advance by experiments or the like. In this case, by setting the intervals L1a and L2a before contraction to a constant value, it is possible to obtain appropriate ranges of the intervals L1 and L2, that is, the intervals L1 and L2 when the shrinkable tube 50 contracts at a desired contraction rate from the ratios L1/L1a and L2/L2a obtained as described above. With the appropriate range of the intervals L1 and L2, it is possible to determine whether or not the shrink tube 50 shrunk by the heat treatment has a desired shrinkage ratio. The "desired shrinkage ratio" is a shrinkage ratio at which the shrunk shrink tube 50 can obtain the functions (here, the insulation protection function and the water stop function) required for the shrink tube 50.

In the step of determining the shrinkage percentage of the shrinkable tube 50, first, the intervals L1 and L2 in the determination pattern 60 of the shrinkable tube 50 shrunk by the above-described heat treatment can be measured by visual observation, image analysis, or the like. Next, it is determined whether or not the measured intervals L1 and L2 are included in the appropriate range determined in advance. At this time, if the measured intervals L1 and L2 are included in the appropriate range, the shrinkable tube 50 shrinks at a desired shrinkage rate, and it can be determined that the shrunk shrinkable tube 50 has a desired function (here, the insulation protection function and the water stop function). Thus, the insulation reliability and water stopping performance of the connection portion 40 can be visually recognized by the determination pattern 60. Further, whether or not the shrinkage rate of the shrink tube 50 is a desired shrinkage rate can be determined by a simpler method than the leak check of the measurement of the intervals L1, L2, and therefore the number of steps can be reduced compared to the conventional method. This can improve the workability of assembling the wire harness 10.

When the measured distances L1 and L2 are greater than the appropriate range, it can be determined that the shrinkage rate of the shrinkable tube 50 is insufficient. When the measured intervals L1 and L2 are smaller than the appropriate range, it can be determined that the shrinkage rate of the shrinkable tube 50 is excessive.

Next, the operation and effects of the present embodiment will be described.

(1) A tubular shrink tube 50 is provided to cover the connection portion between the core wire 21 of the electric wire 20 and the electric wire connection portion 31 of the connection terminal 30. The discrimination pattern 60 is printed on the outer peripheral surface of the shrinkable tube 50, and the discrimination pattern 60 includes a 1 st discrimination pattern 61 capable of discriminating the shrinkage ratio of the shrinkable tube 50 in the radial direction.

According to this configuration, the shrinkage rate of the shrinkable tube 50 in the radial direction can be visually or optically determined by the 1 st determination pattern 61, for example. Therefore, the wire harness 10 having an excessive shrinkage factor in the radial direction of the shrink tube 50 or the wire harness 10 having an insufficient shrinkage factor in the radial direction of the shrink tube 50 can be easily discriminated on the basis of the 1 st discrimination pattern 61. Accordingly, the insulation reliability and the water stopping performance of the connection portion 40 can be visually recognized by the 1 st discrimination pattern 61, and therefore, the deterioration of the quality of the wire harness 10 can be suppressed. Further, since a leak test for evaluating the water stopping property of the shrinkage tube 50 and the like can be omitted, the workability of assembling the wire harness 10 can be improved.

(2) The discrimination pattern 60 includes a 2 nd discrimination pattern 62 capable of discriminating the shrinkage ratio in the longitudinal direction of the shrinkable tube 50. With this configuration, the shrinkage rate in the longitudinal direction of the shrinkable tube 50 can be discriminated by the 2 nd discrimination pattern 62. Therefore, the wire harness 10 having an excessive shrinkage factor in the longitudinal direction of the shrink tube 50 or the wire harness 10 having an insufficient shrinkage factor in the longitudinal direction of the shrink tube 50 can be easily discriminated on the basis of the 2 nd discrimination pattern 62.

(3) The 1 st discrimination pattern 61 is a pattern in which a plurality of 1 st patterns 61A extending in the longitudinal direction of the shrink tube 50 are printed at equal intervals in the circumferential direction of the shrink tube 50. The 2 nd discrimination figure 62 is a figure in which a plurality of 2 nd figures 62A extending in the circumferential direction of the shrink tube 50 are printed at equal intervals in the longitudinal direction of the shrink tube 50.

According to this configuration, the shrinkage percentage in the radial direction of the shrinkable tube 50 can be determined by measuring how much the interval L1 of the adjacent 1 st pattern 61A is narrowed in the shrinkable tube 50 after shrinking compared to before shrinking. In addition, by measuring how much the interval L2 between the adjacent 2 nd patterns 62A is narrowed in the contracted tube 50 before the contraction, the contraction rate in the longitudinal direction of the contracted tube 50 can be determined.

(4) The discrimination pattern 60 is printed on the entire outer peripheral surface of the shrink tube 50. With this configuration, the shrinkage rate of the shrinkable tube 50 can be determined over the entire circumference in the circumferential direction and the entire length in the longitudinal direction of the shrinkable tube 50.

(5) The shrinkage tube 50 has a laminated structure including a heat shrinkage tube 51 and an adhesive layer 52 formed on an inner circumferential surface of the heat shrinkage tube 51. According to this configuration, the adhesive layer 52 formed on the inner peripheral surface of the heat shrinkable tube 51 can improve the adhesion between the heat shrinkable tube 51 and the insulating cover 22 and the adhesion between the heat shrinkable tube 51 and the wire connecting portion 31.

(other embodiments)

The above embodiment can be modified as follows. The above-described embodiments and the following modifications can be implemented in combination with each other within a range not technically contradictory.

The adhesive layer 52 in the shrink tube 50 of the above embodiment may be omitted.

The water stopping function of the shrink tube 50 of the above embodiment may be omitted.

In the above embodiment, the shrink tube 50 covering the core wire 21 as the 1 st conductor and the connection portion 40 of the connection terminal 30 as the 2 nd conductor is embodied, but is not limited thereto.

For example, as shown in fig. 5, the shrinkable tube 50A covering the connection portion 80 of the core wire 21 (1 st conductor) of the electric wire 20 and the core wire 71 (2 nd conductor) of the electric wire 70 may be embodied. The wire harness 10 of the present modification has the electric wires 20 and the electric wires 70 of mutually different kinds, the connecting portion 80 that electrically connects those electric wires 20 and the electric wires 70, and the shrink tube 50A that covers the connecting portion 80. The wire harness 10 is, for example, a wire harness constructed by connecting an electric wire 20 and an electric wire 70 formed separately from the electric wire 20 in the longitudinal direction of the wire harness 10.

The electric wire 70 has a core wire 71 made of a conductor and an insulating coating 72 that coats the outer periphery of the core wire 71. As the core wire 71, for example, a stranded wire, a columnar conductor, a cylindrical conductor, or the like can be used. As a material of the core wire 71, for example, a metal material such as copper-based or aluminum-based can be used. The core wire 71 is formed by extrusion molding, for example. In the present modification, the core wire 21 of the electric wire 20 is a twisted wire, and the core wire 71 of the electric wire 70 is a single core wire.

The insulating coating portion 72 coats the outer peripheral surface of the core wire 71 over the entire circumference in the circumferential direction, for example. The insulating coating portion 72 is made of an insulating material such as synthetic resin. As a material of the insulating coating portion 72, for example, a synthetic resin containing a polyolefin resin such as crosslinked polyethylene or crosslinked polypropylene as a main component can be used. As the material of the insulating coating portion 72, one material may be used alone, or two or more materials may be used in appropriate combination. The insulating coating 72 can be formed by extrusion molding of the core wire 71, for example. As the insulating coating portion 72, a heat shrinkable tube or a rubber tube can be used.

At the connecting portion 80, the core wire 21 of the electric wire 20 and the core wire 71 of the electric wire 70 are joined. Specifically, the insulating coating 22 is stripped off from the end of the electric wire 20 to a predetermined length at the end of the electric wire 20, and the core wire 21 is exposed. Further, at the end of the electric wire 70, the insulating coating 72 is stripped off from the tip of the electric wire 70 to a predetermined length, exposing the core wire 71. Further, at the connection portion 80, the core wire 71 exposed from the end portion of the insulating cover 72 is joined to the core wire 21 exposed from the end portion of the insulating cover 22. For example, at the connecting portion 80, the core wire 21 and the core wire 71 are overlappingly joined in the radial direction (the direction crossing the longitudinal direction of the core wires 21, 71). The method of connecting the core wire 21 and the core wire 71 is not particularly limited. For example, ultrasonic welding, laser welding, or the like can be used as a method of connecting the core wire 21 and the core wire 71.

The shrink tube 50A is formed in a long cylindrical shape, for example. The shrink tube 50A is, for example, a heat shrink tube. The shrink tube 50A of the present modification is a member composed of a single layer. That is, the shrink tube 50A of the present modification does not have an adhesive layer.

As a material of the shrink tube 50A, for example, thermoplastic synthetic resin can be used. As the thermoplastic synthetic resin, for example, a thermoplastic resin having a crosslinked structure can be used. For example, as the thermoplastic synthetic resin, a thermoplastic resin having a crosslinked structure crosslinked by irradiation with an electron beam can be used. As a material of the shrink tube 50A, for example, a synthetic resin containing a polyolefin resin such as crosslinked polyethylene or crosslinked polypropylene as a main component can be used. The material of the shrink tube 50A is preferably the same resin material as the material of the insulating coatings 22 and 72. As the material of the shrink tube 50A, one material may be used alone, or two or more materials may be used in appropriate combination.

The shrink tube 50A is formed in such a manner as to cover the core wire 21 and the connection portion 80 of the core wire 71. The shrink tube 50A is formed to cover the core wires 21 exposed from the insulating cover 22 and the core wires 71 exposed from the insulating cover 72, for example. The shrink tube 50A is formed so as to surround the outer circumference of the electric wire 20 and the outer circumference of the electric wire 70 over the entire circumference in the circumferential direction. The shrink tube 50A is formed, for example, so as to bridge between the end of the insulating coating 22 of the electric wire 20 and the end of the insulating coating 72 of the electric wire 70. For example, one end of the shrink tube 50A covers the outer peripheral surface of the end of the insulating cover 22, and the other end of the shrink tube 50A covers the outer peripheral surface of the end of the insulating cover 72. The inner peripheral surface of one end of the shrink tube 50A is bonded to the outer peripheral surface of the insulating coating 22 over the entire circumference thereof without a gap. The inner peripheral surface of the other end portion of the shrink tube 50A is bonded to the outer peripheral surface of the insulating coating portion 72 over the entire circumference thereof without a gap. For example, the inner peripheral surface of one end portion of the shrink tube 50A is adhered to the outer peripheral surface of the insulating coating 22 by welding, and the inner peripheral surface of the other end portion of the shrink tube 50A is adhered to the outer peripheral surface of the insulating coating 72 by welding. Examples of welding (thermal welding) that can be used here include ultrasonic welding, vibration welding, high-frequency welding, laser welding, infrared welding, friction welding, hot plate welding, and hot air welding.

When the shrinkable tube 50A is shrunk, for example, the shrinkable tube 50A before shrinking is heated by a heater or the like in a state where the shrinkable tube 50A is arranged at a position surrounding the connection portion 80. By this heating, the shrink tube 50A as a heat shrink tube shrinks in the radial direction and the longitudinal direction to be in close contact with the outer peripheral surfaces of the insulating coatings 22 and 72, and the inner peripheral surface of the shrink tube 50A made of a thermoplastic resin is adhered to the outer peripheral surfaces of the insulating coatings 22 and 72 by welding. That is, the inner peripheral surface of the shrink tube 50A is bonded to the outer peripheral surfaces of the insulating coatings 22 and 72 by heat for shrinking the shrink tube 50A. In this case, when the shrinkable tube 50A and the insulating coatings 22 and 72 are made of the same synthetic resin, they are easily bonded to each other at a molecular level, and thus can be firmly bonded to each other. With this configuration, the gap between the shrink tube 50A and the insulating cover 22 is closed, and the gap between the shrink tube 50A and the insulating cover 72 is closed. This can suppress liquid from entering the inside of the shrinkable tube 50A from between the shrinkable tube 50A and the insulating cover 22 and from between the shrinkable tube 50A and the insulating cover 72.

As shown in fig. 6, a determination pattern 60 capable of determining the shrinkage rate of the shrink tube 50A is printed on the outer circumferential surface of the shrink tube 50A. The discrimination pattern 60 includes a 1 st discrimination pattern 61 capable of discriminating the shrinkage ratio of the shrinkable tube 50A in the radial direction and a 2 nd discrimination pattern 62 capable of discriminating the shrinkage ratio of the shrinkable tube 50A in the longitudinal direction. By providing such a discrimination pattern 60, the same effects as those in (1) to (4) of the above embodiments can be obtained.

In the modification shown in fig. 5, the combination of the core wire 21 and the core wire 71 is not particularly limited. For example, both the core wire 21 and the core wire 71 may be stranded wires. Further, both the core wire 21 and the core wire 71 may be single core wires.

The heat-shrinkable tube 50A shown in fig. 5 may be replaced with a laminated structure including a heat-shrinkable tube and an adhesive layer formed on the inner peripheral surface of the heat-shrinkable tube.

The shape of the discrimination pattern 60 in the shrinkable tube 50 according to the above embodiment is not particularly limited. That is, the shape of the determination pattern 60 is not limited as long as the shape can determine the shrinkage rate in the radial direction and the longitudinal direction of the shrinkage tube 50.

For example, as shown in fig. 7, the shape of the discrimination pattern 60 may be changed. That is, the discrimination pattern 60 may be changed to the following shape: the plurality of patterns 63 extending in the 1 st direction inclined with respect to both the circumferential direction and the longitudinal direction of the shrink tube 50 are provided at equal intervals along the 2 nd direction orthogonal to the 1 st direction, and the plurality of patterns 64 extending in the 2 nd direction are provided at equal intervals along the 1 st direction. In this case, the discrimination pattern 60 is formed in a lattice shape as a whole by the plurality of patterns 63 and the plurality of patterns 64.

For example, as shown in fig. 8, the shape of the discrimination pattern 60 may be changed. That is, the discrimination pattern 60 may be changed to a shape in which the plurality of dot patterns 65 are arranged. For example, the discrimination pattern 60 may be changed to the following shape: the plurality of dot patterns 65 are provided at equal intervals in the circumferential direction of the shrink tube 50, and the plurality of dot patterns 65 are provided at equal intervals in the longitudinal direction of the shrink tube 50. In the illustrated example, each dot pattern 65 is formed in a diamond shape. The shape of each dot pattern 65 may be changed to a shape other than a diamond shape (for example, a circle).

For example, the shape of the discrimination pattern 60 may be changed to: the discrimination pattern 60 before shrinkage is intentionally a distorted image or character, and becomes a beautiful image or character in which the distortion is eliminated when the pattern is shrunk at a desired shrinkage rate. With this configuration, it is possible to easily determine whether or not the shrinkage rate of the shrinkage tube 50 is a desired shrinkage rate based on the determination pattern 60 after shrinkage.

The determination pattern 60 of the above embodiment is embodied to be able to determine the shrinkage rate of the shrinkable tube 50 in the radial direction and the longitudinal direction, but is not limited thereto. For example, the determination pattern 60 may be changed to a pattern that can determine only the radial shrinkage rate of the shrinkage tube 50.

For example, as shown in fig. 9, the 1 st discrimination pattern 61 that can discriminate the radial shrinkage rate of the shrink tube 50 may be printed only on the outer peripheral surface of the shrink tube 50 (heat shrink tube 51).

In the above embodiment, the discrimination pattern 60 is printed on the entire outer peripheral surface of the shrink tube 50 (heat shrink tube 51), but the present invention is not limited thereto.

For example, as shown in fig. 10, the discrimination pattern 60 may be partially printed on a part of the outer peripheral surface of the shrink tube 50.

The electromagnetic shield member may be provided inside the exterior member 25 in the above embodiment. The electromagnetic shield member is provided between the inner peripheral surface of the exterior member 25 and the outer peripheral surface of the electric wire 20, for example. As the electromagnetic shielding member, for example, a flexible braided wire or a metal foil can be used.

In the above embodiment, the number of the wires 20 included in the wire harness 10 is not particularly limited, and the number of the wires 20 may be changed according to the specification of the vehicle V. For example, the wire harness 10 may be configured by additionally including a low-voltage wire for connecting a low-voltage battery to various low-voltage devices (e.g., a lamp, a car audio, and the like).

The arrangement relationship between the inverter 11 and the high-voltage battery 12 in the vehicle V is not limited to the above embodiment, and may be appropriately changed according to the vehicle structure.

In the above embodiment, the inverter 11 and the high-voltage battery 12 are used as the electric devices connected by the electric wire 20, but the present invention is not limited thereto. For example, the present invention may be applied to an electric wire connecting the inverter 11 and a motor for driving wheels. That is, any configuration may be applied as long as it electrically connects the electrical devices mounted on the vehicle.

The outer peripheral surface of the shrink tube can include a discrimination pattern and a non-discrimination pattern portion other than the discrimination pattern. The discriminant pattern is sometimes referred to as a printed portion of the shrink tube, and the non-discriminant pattern portion is sometimes referred to as a non-printed portion of the shrink tube. The discriminant pattern may also be formed by a material that is visually or optically detectable. The discriminant pattern may have a 1 st optical characteristic, and the non-discriminant pattern portion may have a 2 nd optical characteristic different from the 1 st optical characteristic. The discrimination pattern may be different from the non-discrimination pattern portion in, for example, reflectance or absorbance with respect to light of a predetermined wavelength.

The disclosed embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined not by the above description but by the appended claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

Description of the symbols

C1 connector

L1, L1a intervals

L2, L2a intervals

V vehicle

10 harness

11 inverter

12 high voltage battery

20 electric wire (1 st electric wire)

21 core wire (1 st conductor, 1 st core wire)

22 insulating coating (1 st insulating coating)

25 exterior member

30 connecting terminal

31 electric wire connecting part (2 nd conductor)

32 terminal connection part

32X through hole

40 connecting part

50. 50A shrink tube

51 heat shrinkable tube

52 adhesive layer

60 discriminative pattern

61 st discrimination figure

61A figure 1

62 nd 2 discriminating pattern

62A figure 2

63. 64 figure

65 dot pattern

70 electric wire (No. 2 electric wire)

71 core wire (2 nd conductor, 2 nd core wire)

72 insulating coating part (No. 2 insulating coating part)

80 connecting portion.