JP2012198996A - Flat cable, and wiring harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flat cable in which deformation can be prevented by eliminating disturbance in the arrangement of a plurality of wires superimposed on another flat cable, and stabilized state can be maintained when they are superimposed, and to provide a wiring harness.SOLUTION: Flat cables 1, 1' comprise a core wire 21 and a coating 22 covering the core wire 21, and comprises a plurality of wires 2A, 2B, 2C, 2D arranged side by side in one direction so as to be parallel with each other, and a protective coating 3 which covers the outer periphery of the plurality of wires 2A, 2B, 2C, 2D collectively. One flat cable is superimposed, at least partially, on another flat cable in the direction perpendicular to both the one direction and the longitudinal direction of the wire. An overlapping part 31 formed to have a flat surface is provided at a part of the protective coating 3 overlapping the other flat cable.

Description

  The present invention includes a core wire and a covering portion that covers the core wire, and includes a plurality of electric wires arranged in one direction so as to be parallel to each other, and a protective covering portion that covers the outer periphery of the plurality of electric wires. The present invention relates to a flat cable and a wire harness.

  In recent years, environmental problems due to global warming, energy problems due to oil depletion, and the need for electric vehicles have increased rapidly due to the recent economic crisis. Is accelerating. The electric vehicle is a vehicle that travels by an electric motor using electric power obtained from a battery as a power source. Charging stations are becoming popular for charging batteries mounted on this electric vehicle. A charging cable is attached to the charging stand, and the battery is charged through the charging cable by connecting the charging cable to the vehicle.

  For example, the charging cable shown in FIG. 10 is known. As shown in the figure, the conventional charging cable 101 includes four wires 102 having a core wire 121 and a covering portion 122 that covers the core wire 121, and the four wires 102 being twisted together. And a protective coating 103 for covering. The charging cable 101 has a circular cross section. Since the charging cable 101 has a circular cross-sectional shape, the charging cable 101 has the same radial dimension in the cross-sectional shape, and thus the charging cable 101 has uniform flexibility in all directions. (For example, see Patent Document 1).

  However, although the conventional charging cable 101 described in Patent Document 1 has equal flexibility in all directions in its cross-sectional shape, the charging cable 101 is configured by twisting four electric wires 102 together. Therefore, there is a problem that when the charging cable 101 is bent, the electric wires 102 are rubbed with each other and the charging cable 101 is difficult to be bent. That is, there is a problem that the charging cable 101 is not easily bent.

  Therefore, in order to solve the above problem, a charging cable 201 including two electric wires 102 arranged in parallel along one direction and a protective covering portion 203 covering the outer periphery of the two electric wires 102. Has been proposed. (For example, refer to Patent Document 2).

  The charging cable 201 shown in FIG. 11 described in Patent Document 2 has an elliptical cross-sectional shape. In this charging cable 201, each electric wire 102 is provided in a straight line, and since the four electric wires 102 are not twisted together like the above-described charging cable 101, even when the charging cable 201 is bent. The electric wires 102 are not rubbed with each other. Further, since the charging cable 201 has an elliptical cross-sectional shape, the charging cable 201 is limited by limiting the direction in which the charging cable 201 is bent to the minor axis direction (arrow Y direction) in the cross-sectional shape. To improve flexibility.

JP-A-8-235937 JP-A-7-226112

  However, the above-described conventional charging cable 201 has the following problems. That is, as shown in FIG. 12A, when the conventional charging cable 201 receives a load along the direction in which the electric wires 102 are arranged (the direction of the arrow Y), as shown in FIG. There is a problem that the charging cable 201 is deformed by being moved inside the protective covering portion 203 and thereby disturbing the arrangement of the two electric wires 102.

  The present invention aims to solve the above problems. That is, the present invention can prevent the deformation of the arrangement of the plurality of electric wires in the portion overlapped with another flat cable without being disturbed, and a stable state when these are overlapped. An object of the present invention is to provide a flat cable and a wire harness that can be maintained.

  The present invention according to claim 1 is provided with a core wire and a covering portion covering the core wire, and a plurality of electric wires arranged in one direction so as to be parallel to each other, and outer peripheries of the plurality of electric wires are bundled together A flat cable that is at least partially overlapped in a direction perpendicular to the two directions of the one direction of the other flat cable and the longitudinal direction of the electric wire. The flat cable is characterized in that an overlapping portion having a flat surface is provided in a portion of the portion that is overlapped with the other flat cable.

  According to a second aspect of the present invention, in the first aspect of the present invention, a notch that is formed in a concave shape from the surface of the overlapping portion and extends along a longitudinal direction of the electric wire is provided. And

  According to a third aspect of the present invention, in the present invention according to the first or second aspect, the protective covering portion includes a first protective portion and a second protection filled inside the first protective portion. The second protective part is lower in hardness than the first protective part.

  According to a fourth aspect of the present invention, there is provided the flat cable according to any one of the first to third aspects, and a connector attached to an end of the flat cable. This is a characteristic wire harness.

  According to the first and fourth aspects of the present invention, there are provided a plurality of electric wires provided with a core wire and a covering portion covering the core wire, arranged in one direction so as to be parallel to each other, and the plurality of electric wires. A flat cable that includes a protective covering portion that collectively covers the outer periphery of the cable, and at least a portion of the flat cable is overlapped in a direction perpendicular to the bidirectional direction of the one direction of the other flat cable and the longitudinal direction of the electric wire. In the protective covering portion, a portion where the other flat cable is overlapped is provided with an overlapping portion having a flat surface, and a stable state is maintained by overlapping these flat surfaces. In addition, when a flat cable and another flat cable are overlapped, the portion where the flat cable and another flat cable are overlapped even when a load is applied in the direction in which the plurality of electric wires are arranged. It becomes difficult to bend, It is possible to provide flat cable can be prevented from being deformed by that eliminates the arrangement of a plurality of electric wires is disturbed, and the wire harness for.

  According to the second aspect of the present invention, the flat cable is formed with respect to the bidirectional direction because the notch is formed to be concave from the surface of the flat portion and extends along the longitudinal direction of the electric wire. Even when each electric wire is energized in a state of being stacked along a direction orthogonal to each other, an air flow path is secured and heat is dissipated through this flow path, and the amount of increase in the temperature of each flat cable is reduced. By being suppressed, the reduction amount of the allowable current value of each electric wire can be reduced.

  According to the third aspect of the present invention, the protective covering portion is configured in a double structure including a first protective portion and a second protective portion filled inside the first protective portion. And since the said 2nd protection part has hardness lower than the said 1st protection part, it can ensure, without reducing the softness | flexibility to the direction orthogonal to the said bidirectional | two-way.

It is a side view showing the wire harness aggregate which constitutes the wire harness concerning a 1st embodiment of the present invention. It is a figure which shows the cross section of the flat cable which comprises the wire harness shown by FIG. It is sectional drawing which follows the II line | wire in FIG. It is a figure which shows the cross section of the flat cable concerning 2nd Embodiment of this invention. It is a figure which shows the state on which the flat cable shown by FIG. 4 was piled up. It is a figure which shows the cross section of the flat cable concerning 3rd Embodiment of this invention. It is a figure which shows the state on which the flat cable shown by FIG. 6 was piled up. It is sectional drawing which shows the modification of the flat cable shown by FIG. It is a figure which shows the state with which the flat cable shown by FIG. 8 was piled up. It is sectional drawing which shows an example of the conventional charging cable. It is sectional drawing which shows another example of the conventional charging cable. (A) is sectional drawing which shows a mode that the charging cable shown by FIG. 11 was weighted along the major axis direction, (b) is the state which the flat cable shown by (a) deform | transformed. FIG.

(First embodiment)
A wire harness and a flat cable according to a first embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the wire harness assembly 10 includes four wire harnesses 8 each including a flat cable 1 and a connector 6 attached to one end 1 a along the longitudinal direction of the flat cable 1. Has been. The wire harness assembly 10 is connected to a charging stand 7 whose other end 1b opposite to the connector 6 generates a voltage and current suitable for charging based on power supplied from an AC power source. The charging stand 7 to which the wire harness assembly 10 is connected is for simultaneously charging the batteries mounted on the four electric vehicles. That is, the wire harness assembly 10 is used for simultaneously charging each battery mounted on a plurality of electric vehicles.

  As shown in FIG. 2, the flat cable 1 includes four electric wires 2A, 2B, 2C, and 2D arranged in one direction so as to be parallel to each other, and the four electric wires 2A, 2B, And a protective cover 3 that collectively covers the outer peripheries of 2C and 2D.

  Moreover, the arrow X direction shown in FIG. 2 etc. is a direction parallel to “one direction” indicated in the scope of the claims, the direction in which the four electric wires 2A, 2B, 2C, 2D are arranged, and the flat type. The major axis direction in the cross-sectional shape of the cable 1 is shown. Moreover, the arrow Y direction shown in FIG. 2 etc. is the direction orthogonal to the bidirectional | two-way of the major axis direction (arrow X direction) and the electric wire 2A, 2B, 2C, 2D, and the cross-sectional shape of the flat cable 1 The minor axis direction (arrow Y direction) is shown.

  As shown in FIGS. 1 and 3, the flat cable 1 is fixed in a state where the other end 1 b is overlapped along the short diameter direction (arrow Y direction) of the flat cable 1.

  Each of the electric wires 2A, 2B, 2C, and 2D is a covered electric wire having a round cross section that includes a core wire 21 formed by twisting a plurality of strands and a covering portion 22 that covers the core wire 21. The core wire 21 is made of copper or a copper alloy. Moreover, the core wire 21 may be comprised from one strand. The covering portion 22 is made of an insulating synthetic resin such as polyvinyl chloride (PVC) or polyolefin (PE, PP, etc.).

  In addition, two (a pair) of the four electric wires 2A, 2B, 2C, and 2D are connected to a battery mounted on the electric vehicle via the connector 6. A current for charging the battery flows through the pair of electric wires 2A and 2D. The pair of electric wires 2 </ b> A and 2 </ b> D are provided at both ends of the flat cable 1 in the long diameter direction (arrow X direction). A control signal is transmitted to the electric wire 2B. The electric wire 2C is used as a ground wire. Also, a larger current flows through the pair of electric wires 2A and 2D than the two electric wires 2B and 2C.

  The protective covering 3 is made of an insulating synthetic resin such as polyvinyl chloride (PVC) or polyolefin (PE, PP, etc.). This protective covering 3 is formed by extrusion molding on the outer periphery of four electric wires 2A, 2B, 2C, and 2D arranged in one direction (arrow X direction) so as to be parallel to each other. And the protective coating | coated part 3 covers four electric wires 2A, 2B, 2C, and 2D collectively. Since the protective covering 3 covers the four electric wires 2A, 2B, 2C, and 2D, the outer surface of the flat cable 1 forms the outer surface of the protective covering 3. In addition, the protective covering portion 3 is provided with an overlapping portion 31 having a flat surface at a portion that is overlapped with another flat cable 1. A pair of the overlapping portions 31 are provided at positions facing each other in a direction (arrow Y direction) orthogonal to the bidirectional direction of the protective covering portion 3.

  The connector 6 is made of a conductive metal. This connector 6 is connected to a battery mounted on the electric vehicle.

  Further, the other end 1b of each flat cable 1 in the wire harness assembly 10 is fixed in an overlapped state, and the portion fixed in the state in which the other end 1b of each flat cable 1 is overlapped is, One plug part (not shown) for attaching to the charging stand 7 is attached. When the plug portion is inserted into a plug receiving portion provided on the charging stand 7, all the electric wires 2 </ b> A, 2 </ b> B, 2 </ b> C, and 2 </ b> D constituting the wire harness assembly 10 are electrically connected to the charging stand 7. That is, by inserting the plug portion into the plug receiving portion, all the electric wires 2A, 2B, 2C and 2D constituting the wire harness assembly 10 are electrically connected to the charging stand 7 at once.

  Next, a method for manufacturing the above-described wire harness assembly 10 will be described. First, four electric wires 2A, 2B, 2C, and 2D are manufactured in advance. Of these four electric wires 2A, 2B, 2C, and 2D, a pair of electric wires 2A and 2D through which a current for charging the battery flows is positioned at both ends, and a control signal is transmitted between the pair of electric wires 2A and 2D. The four electric wires 2A, 2B, 2C, and 2D are arranged in parallel with each other in such a manner that the electric wire 2B used for transmission and the electric wire 2C used as a ground wire are positioned. The protective coating 3 is formed by extruding a synthetic resin such as polyvinyl chloride (PVC) or polyolefin (PE, PP, etc.) on the outer periphery of 2A, 2B, 2C, 2D. In this way, the flat cable 1 is formed.

  Next, the protective covering 3 at one end 1a of the flat cable 1 and the respective coverings 22 of the four electric wires 2A, 2B, 2C, and 2D are peeled off. And each core wire 21 exposed from each coating | coated part 22 of 4 electric wires 2A, 2B, 2C, and 2D and the connector 6 are connected. In this way, the wire harness 8 is formed.

  Next, in a state where the four flat cables 1 are overlapped along the minor axis direction (arrow Y direction), a binding band is wound around the outer periphery of the other end 1b in the longitudinal direction of the four flat cables 1 stacked on each other. Thus, the other ends 1b of the four flat cables 1 are bundled. Thus, the four flat cables 1 are fixed in a state where they are overlapped with each other. At this time, since the ends 1a in the longitudinal direction of the flat cables 1 stacked on each other are not fixed, the ends 1a are separated from each other. Then, a plug portion is attached to the other end 1 b of the flat cable 1 in the wire harness assembly 10. Thus, the wire harness assembly 10 is formed.

  According to the embodiment described above, the protective covering portion 3 is provided with the overlapping portion 31 having a flat surface, so that a stable state can be maintained by overlapping these flat surfaces. When the flat cable 1 and another flat cable 1 are overlapped with each other, even when the electric wires are loaded in the 2A, 2B, 2C, 2D direction (arrow X direction), A flat type that can be prevented from being deformed by preventing the arrangement of the four electric wires 2A, 2B, 2C, and 2D from being disturbed because the portion where the other flat type cable 1 is overlapped becomes difficult to bend. The cable 1 and the wire harness 8 can be provided.

  In addition, a pair of wires 2A and 2D provided at both ends of the plurality of wires 2A, 2B, 2C and 2D in the direction in which the wires 2A, 2B, 2C and 2D are arranged (arrow X direction) are wires connected to the battery. Since the electric wire 2B for transmitting a control signal and the electric wire 2C used as a ground wire are provided between the pair of electric wires 2A and 2D, the pair of electric wires 2A and 2D are positioned in the vicinity. Will also increase the distance between the pair of electric wires 2A and 2D, and thus the amount of increase in the temperature of each flat cable 1 is further suppressed, so that the allowable current value of each electric wire 2A, 2B, 2C and 2D can be reduced. The amount of reduction can be reduced.

(Second Embodiment)
Subsequently, a flat cable according to a second embodiment of the present invention will be described with reference to FIG. 4 or FIG. In FIG. 4 or FIG. 5, the same reference numerals are given to the same portions as those of the above-described embodiment, and the description thereof is omitted.

  As shown in FIG. 4, the flat cable 1 includes four electric wires 2A, 2B, 2C, and 2D arranged in one direction so as to be parallel to each other, and these four electric wires 2A, 2B, The protective coating | cover part 3 which covers the outer periphery of 2C and 2D, and the notch 4 are provided.

  A pair of the notches 4 is provided in each of the overlapping portions 31 provided in the protective covering portion 3. The pair of notches 4 are provided at positions facing each other along the minor axis direction (arrow Y direction) of the flat cable 1. Each notch 4 is recessed from the surface of the overlapping portion 31. Each notch 4 is provided over the entire length along the longitudinal direction of the flat cable 1. In addition, as shown in FIG. 5, each notch 4 is provided in the central portion of the protective covering portion 3 in the major axis direction (arrow X direction), and when the overlapping portion 31 is overlapped with another flat cable 1, The edges of the notches 4 provided in the overlapped portions 31 are overlapped with each other.

  According to the above-described embodiment, the flat cable 1 is provided with the notch 4 that is formed concavely from the surface of the overlapping portion 31 and extends along the longitudinal direction of the electric wires 2A, 2B, 2C, and 2D. Even when each of the electric wires 2A, 2B, 2C, and 2D is energized in a state of being stacked along a direction perpendicular to the bidirectional direction (arrow Y direction), an air flow path is secured and this flow is ensured. The heat is dissipated by the road, and the amount of decrease in the allowable current value of each of the electric wires 2A, 2B, 2C, and 2D can be reduced by suppressing the increase in the temperature of each flat cable 1.

  Further, when the overlapping portion 31 is overlapped with another flat cable 1, the edges of the notches 4 provided in each overlapping portion 31 are overlapped, so that the two notches 4 are overlapped to increase the cross-sectional area of the notch 4. As a result, the flow path of the air is expanded, and thus the increase in the temperature of each flat cable 1 is further suppressed, thereby reducing the allowable current value of each of the electric wires 2A, 2B, 2C, and 2D. The amount can be reduced.

(Third embodiment)
Then, the flat cable concerning 3rd Embodiment of this invention is demonstrated with reference to FIG. 6 or FIG. In FIG. 6 or FIG. 7, the same reference numerals are given to the same parts as those of the above-described embodiment, and the description thereof is omitted.

  As shown in FIGS. 6 and 7, the flat cable 1 'includes four electric wires 2A, 2B, 2C, and 2D arranged in one direction so as to be parallel to each other, and these four electric wires. 2A, 2B, 2C, and 2D are provided with a protective covering 3 and a notch 4 ′. The protective covering portion 3 has a double structure including a first protective portion 3A and a second protective portion 3B filled inside the first protective portion 3A.

  The first protective portion 3A is made of an insulating synthetic resin such as polyvinyl chloride (PVC) or polyolefin (PE, PP, etc.). The first protective portion 3A is formed by extrusion molding on the outer periphery of the second protective portion 3B described later. Since the first protective portion 3A covers the second protective portion 3B, the outer surface of the protective covering portion 3 forms the outer surface of the first protective portion 3A. That is, the notch 4 ′ is formed on the outer surface of the first protective portion 3A.

  The second protective portion 3B is made of an insulating synthetic resin similar to the first protective portion 3A, such as polyvinyl chloride (PVC) or polyolefin (PE, PP, etc.). This 2nd protection part 3B is comprised so that hardness may become lower than 3 A of 1st protection parts. Moreover, the 2nd protection part 3B is formed in the outer periphery of the four electric wires 2A, 2B, 2C, and 2D arranged so that it may become mutually parallel by extrusion molding. In addition, the second protection unit 3B is arranged between the pair of electric wires 2B and 2C so that the pair of adjacent electric wires 2B and 2C among the four electric wires 2A, 2B, 2C and 2D are positioned at positions separated from each other. Is also provided.

  The pair of notches 4 ′ are provided at positions facing each other in the major axis direction (arrow Y direction) between the pair of wires 2 </ b> B and 2 </ b> C. Since the notch 4 'is provided between the pair of electric wires 2B and 2C, the notch 4' has a cross-sectional area that is equal to the second even if the notch 4 'and the two electric wires 2B and 2C have a certain size. It can be larger than the notch 4 shown in the embodiment.

  Next, a method for manufacturing the flat cable 1 ′ described above will be described. First, four electric wires 2A, 2B, 2C, and 2D are manufactured in advance. Of these four electric wires 2A, 2B, 2C, and 2D, a pair of electric wires 2A and 2D through which electric power for charging the battery flows are positioned at both ends, and a control signal is transmitted between the pair of electric wires 2A and 2D. Are arranged so that the electric wire 2B to be transmitted and the electric wire 2C used as the ground wire are positioned, and these two electric wires 2C, 2D are positioned at positions separated from each other, and these four electric wires 2A, 2B, 2C, 2D Are arranged along one direction (arrow X direction) so as to be parallel to each other, the outer periphery of these four electric wires 2A, 2B, 2C, 2D is coated with polyvinyl chloride (PVC), polyolefin (PE, The second protective portion 3B is formed by extruding a synthetic resin such as PP). A synthetic resin such as polyvinyl chloride (PVC) or polyolefin (PE, PP, etc.) is extruded on the outer periphery of the second protective part 3B, thereby forming the first protective part 3A and simultaneously forming a notch 4 '. . And the protective coating | coated part 3 is shape | molded. Thus, the flat cable 1 ′ is formed.

  According to the embodiment described above, the protective covering portion 3 is filled inside the first protective portion 3A and the first protective portion 3A that collectively cover the outer circumferences of the plurality of electric wires 2A, 2B, 2C, and 2D. The second protective part 3B is configured to have a double structure, and the second protective part 3B has a lower hardness than the first protective part 3A, so that the direction is orthogonal to the bidirectional direction. This can be ensured without reducing flexibility in the direction of arrow Y.

  Further, a pair of adjacent wires 2B, 2C among the four wires 2A, 2B, 2C, 2D are provided at positions spaced apart from each other, and a second protective portion 3B is also provided between the pair of wires 2B, 2C. Since the flat cable 1 'is loaded along the direction in which the electric wires 2A, 2B, 2C, and 2D are arranged (arrow X direction), the electric wire 2B of the pair of electric wires 2B and 2C is also received. Will not move over the second protective part 3B to the other electric wire 2C side, and thus the arrangement of the electric wires 2A, 2B, 2C, 2D will not be disturbed, and the flat cable 1 'will be deformed. Can be prevented.

  Further, since the notch 4 'is provided between the pair of electric wires 2B and 2C, the notch 4' is separated from the electric wires 2B and 2C as compared with the case where the pair of electric wires 2B and 2C are positioned at positions close to each other. Therefore, the distance between the notch 4 'and the electric wires 2B and 2C can be increased. Therefore, the cross-sectional area of the notch 4 ′ can be increased even if a certain dimension between the notch 4 ′ and the electric wires 2B and 2C is secured. Therefore, by increasing the cross-sectional area of the notch 4 ′, the air flow path is expanded, and accordingly, the amount of increase in the temperature of each flat cable 1 ′ is further suppressed, so that each electric wire 2 A, The reduction amount of the allowable current values of 2B, 2C, and 2D can be reduced.

  In the above-described embodiment, the first protective part 3A and the second protective part 3B are made of the same material, but the present invention is not limited to this, and the second protective part 3B is the first protective part. If the hardness is lower than that of the part 3A, the first protective part 3A and the second protective part 3B may be made of different materials.

  In the above-described embodiment, the second protective portion 3B has a lower hardness than the first protective portion 3A. However, the present invention is not limited to this, and as shown in FIGS. The part 3B may have the same hardness as the first protective part 3A, and the second protective part 3B may have a higher hardness than the first protective part 3A. In FIG. 8 and FIG. 9, the same parts as those of the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the embodiment described above, a pair of notches 4 and 4 ′ are provided. However, the present invention is not limited to this, and two notches 4 and 4 ′ are provided as long as they are provided in the overlapping portion 31. The number of notches 4 and 4 'may be one.

  In the above-described embodiment, the flat cable 1, 1 ′ is composed of four electric wires 2A, 2B, 2C, 2D. However, the present invention is not limited to this, and the flat cable 1, 1 'should just be comprised from 2 or more electric wire 2A, 2B, 2C, 2D. Moreover, although the wire harness assembly 10 is composed of four wire harnesses 8, the present invention is not limited to this, and the wire harness assembly 10 may be composed of two or more wire harnesses 8. That's fine.

  Moreover, in embodiment mentioned above, although a pair of electric wire 2B, C is provided in the position which mutually separated among four electric wires 2A, 2B, 2C, 2D, this invention is not limited to this, A pair of adjacent electric wires 2A, 2B and electric wires 2C, 2D may be provided at positions separated from each other, or only a pair of adjacent electric wires 2A, 2B may be provided at positions separated from each other, Only a pair of adjacent electric wires 2C and 2D may be provided at positions separated from each other.

  The above-described embodiments are merely representative examples of the present invention, and the present invention is not limited to the embodiments. That is, various modifications can be made without departing from the scope of the present invention.

1, 1 'flat cable 2A electric wire 2B electric wire 2C electric wire 2D electric wire 3 protective covering portion 3A first protective portion 3B second protective portion 4, 4' notch 6 connector 8 wire harness

Claims (4)

A plurality of electric wires provided with a core wire and a covering portion covering the core wire, arranged in one direction so as to be parallel to each other;
A protective covering portion that collectively covers the outer circumferences of the plurality of electric wires, and at least a part of them is overlapped in a direction orthogonal to the two directions of the one direction of the other flat cable and the longitudinal direction of the electric wires. Flat cable
A flat cable characterized in that an overlapping portion having a flat surface is provided at a portion of the protective covering portion that overlaps with the other flat cable.   2. The flat cable according to claim 1, wherein a notch that is recessed from the surface of the overlapping portion and extends along a longitudinal direction of the electric wire is provided. The protective covering portion is configured in a double structure including a first protective portion and a second protective portion filled inside the first protective portion,
3. The flat cable according to claim 1, wherein the second protection part has a lower hardness than the first protection part. A flat cable according to any one of claims 1 to 3,
And a connector attached to an end of the flat cable.

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