JP2023141621A - Flat type electric wire and flat type electric wire with terminal - Google Patents

Abstract

To provide a flat type electric wire and a flat type electric wire with terminal which can be easily bent and wired.SOLUTION: A flat type electric wire 2 comprises a belt-like conductor 21 and an insulator 22 covering the conductor 21, where the conductor 21 has: a belt-like first conductor 21a constituted by braiding a first wire made of aluminum or aluminum alloy; and a second conductor 21b which is provided at least so as to sandwich the first conductor 21a in a thickness direction of the conductor 21, and constituted by braiding a second wire made of copper or copper alloy.SELECTED DRAWING: Figure 1

Description

The present invention relates to a flat electric wire and a flat electric wire with a terminal.

In equipment such as factories or vehicles such as electric cars and hybrid cars, bus bars shaped to match the shape of the wiring parts have traditionally been used as wiring materials for wiring between devices such as control panels (for example, (See Patent Documents 1 and 2).

JP2019-87471A Japanese Patent Application Publication No. 2020-177878

In recent years, in order to realize a carbon-neutral society, for example, equipment where industrial robots are used has been updated to energy-saving equipment. Along with updating such equipment, it is also necessary to update the wiring materials that are wired between devices such as control panels. However, in order to manufacture a bus bar according to the updated equipment, a mold for molding according to the shape of the bus bar is required. Therefore, a wide variety of molds are required depending on the various wiring shapes of the updated equipment, and the production volume of bus bars of the same shape tends to be small. As described above, bus bars have low versatility and tend to be manufactured in small quantities in a wide variety of products. Therefore, when bus bars are used as wiring materials between devices, there is a problem in that the production cost becomes high.

Therefore, the present inventors considered using a flat electric wire whose conductor is a braided conductor as a wiring material between devices that is more versatile than a bus bar. However, since conventional flat electric wires are difficult to bend, especially when wiring in a narrow space between devices, the flat electric wires may meander and interfere with surrounding devices.

Therefore, an object of the present invention is to provide a flat electric wire that is easy to bend and wire, and a flat electric wire with a terminal.

In order to solve the above problems, the present invention includes a band-shaped conductor and an insulator covering the periphery of the conductor, and the conductor includes a first wire made of aluminum or an aluminum alloy. A band-shaped first conductor constructed by interweaving and a second wire made of copper or a copper alloy, which is provided so as to sandwich the first conductor in the thickness direction of the conductor at least, is constructed by interweaving. Provided is a flat electric wire having a second conductor.

Further, in order to solve the above problems, the present invention provides a flat electric wire with a terminal, comprising a flat electric wire and a terminal provided at at least one end of the flat electric wire, The flat electric wire includes a band-shaped conductor and an insulator covering the periphery of the conductor, and the conductor is a band-shaped conductor formed by interweaving first wires made of aluminum or aluminum alloy. a first conductor; and at least a second conductor that is provided to sandwich the first conductor in the thickness direction of the conductor and is configured by interweaving second wires made of copper or copper alloy. A flat electric wire with a terminal is provided.

According to the present invention, it is possible to provide a flat electric wire that is easy to bend and easy to wire, and a flat electric wire with a terminal.

1 is a diagram showing a flat electric wire with a terminal using a flat electric wire according to an embodiment of the present invention, in which (a) is a perspective view, (b) is an enlarged end view of (a), and (c) is a FIG. 3 is a cross-sectional view taken along line AA in FIG. (a) is a schematic diagram showing an example of wiring of the flat electric wire with a terminal shown in FIG. 1, and (b) is a schematic diagram showing an example of wiring of the conventional flat electric wire with terminal. It is a perspective view which shows the modification of a terminal part. (a) and (b) are sectional views showing a modified example of the flat electric wire 2. FIG. 3 is a sectional view showing a cross section perpendicular to the longitudinal direction of a flat electric wire according to another embodiment of the present invention. (a), (b) is a figure which shows an example of the connection structure of a 1st flat electric wire and a 2nd flat electric wire. It is a figure which shows an example of the connection structure of a 1st flat electric wire and a 2nd flat electric wire. (a) is a sectional view showing a modified example of a flat electric wire, and (b) is a perspective view showing a modified example of a flat electric wire with a terminal.

[Embodiment]
Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a diagram showing a flat electric wire 1 with a terminal using a flat electric wire 2 according to the present embodiment, in which (a) is a perspective view, (b) is an enlarged end view of (a), and ( c) is a sectional view taken along line AA in (a).

As shown in FIGS. 1(a) to (c), the flat electric wire 1 with a terminal includes a flat electric wire 2, a terminal 3 provided at at least one end of the flat electric wire 2, and a heat shrink tube 4. It is equipped with.

(Flat type electric wire 2)
The flat electric wire 2 according to the present embodiment includes a band-shaped conductor 21 and an insulator 22 covering the periphery of the conductor 21.

The conductor 21 includes a band-shaped first conductor 21a formed by interweaving first wires made of aluminum or aluminum alloy, and a second conductor 21b formed by interweaving second wires made of copper or copper alloy. It has .

The first conductor 21a is formed by flattening an annular braided conductor. For example, when manufacturing a coaxial line, a braided conductor is provided around a core covered with an insulator, but in this embodiment, an annular braided conductor is formed without passing through the core, and then The first conductor 21a is formed by flattening the braided conductor using a press or the like. The first conductor 21a is arranged at the center of the cable.

Examples of the aluminum alloy used as the first wire include Al-Zr alloy, Al-Ni-Zr alloy, Al-Co-Zr alloy, Al-Fe-Zr alloy, and the like. Note that the first strand may contain impurities that are unavoidable during manufacturing. Further, the first strand may be a plated wire in which the surface of the strand made of aluminum or an aluminum alloy is plated with Zn (for example, amorphous Zn), Ni, Sn, or the like. The tensile strength and elongation at break of the first strand are smaller than those of the second strand, which will be described later. For example, the first strand has a tensile strength of 200 MPa or less and an elongation at break of 5% or more and 17% or less. In addition, the tensile strength and elongation at break of the first strand and the second strand are the tensile strength and elongation obtained by performing a tensile test on a test piece according to the test method specified in JIS C 3002 (1992). It is.

Here, a first wire made of aluminum and having an outer diameter of 0.16 mm was used. The outer diameter of the first strand is larger than the outer diameter of the second strand. More specifically, the outer diameter of the first strand is preferably at least 1.3 times the outer diameter of the second strand, so that the resistance values of the first strand and the second strand are approximately equal. It is desirable to adjust the outer diameter accordingly. As a result, it is possible to suppress problems such as, for example, the resistance of the first conductor 21a disposed at the center of the cable is large and heat generation is increased, and heat is trapped inside the cable. The outer diameter of the first strand is, for example, 0.10 mm or more and 0.50 mm or less. In addition, when the surface of the first strand is plated, the outer diameter of the first strand is the state in which the periphery of the strand made of aluminum or aluminum alloy is plated (i.e., plated wire). This is the outer diameter at .

By configuring a part of the conductor 21 with the first conductor 21a made of aluminum or an aluminum alloy with a low modulus, the flat electric wire 2 can be easily bent, and when the flat electric wire 2 is bent, the first conductor 21a is made of aluminum or aluminum alloy. Since the shape can be easily maintained, wiring work when wiring in a narrow space between devices becomes easier. Furthermore, by configuring a portion of the conductor 21 with the first conductor 21a made of aluminum or aluminum alloy, the weight of the flat electric wire 2 can be reduced compared to the case where the entire conductor 21 is made of copper or copper alloy. , it becomes possible to reduce costs.

The second conductor 21b is provided to sandwich the first conductor 21a at least in the thickness direction of the conductor 21. In this embodiment, the second conductor 21b is formed into a cylindrical shape so as to cover the entire periphery of the first conductor 21a. The second conductor 21b is formed by using the first conductor 21a as a core material and braiding second wires in a ring shape so as to cover the periphery thereof. The second conductor 21b is placed in contact with the first conductor 21a.

The second strand may be a plated wire in which the surface of a strand made of copper or a copper alloy is plated with Zn (for example, amorphous Zn), Ni, Sn, or the like. The tensile strength and elongation at break of the second strand are greater than those of the first strand. For example, the second wire has a tensile strength of 200 MPa or more and an elongation at break of 10% or more. In order to make the flat electric wire 2 easy to bend, it is desirable to use as thin a wire as possible as the second strand. The outer diameter of the second strand is preferably, for example, 0.10 mm or more and 0.20 mm or less. Here, a second wire made of Sn-plated annealed copper wire with an outer diameter of 0.12 mm, which is smaller than the first wire, was used. In addition, when the surface of the second strand is plated, the outer diameter of the second strand is the state in which the periphery of the strand made of copper or copper alloy is plated (i.e., plated wire). This is the outer diameter at .

The first conductor 21a made of aluminum or an aluminum alloy is susceptible to abrasion, and for example, when the insulator 22 is molded, the first conductor 21a rubs against a part of the device and is likely to break. Therefore, in this embodiment, the first conductor 21a is protected by the second conductor 21b by providing the second conductor 21b made of abrasion-resistant copper or copper alloy so as to cover the first conductor 21a. , the occurrence of disconnection in the first conductor 21a is suppressed. In addition, by providing the second conductor 21b to cover the first conductor 21a, the outermost layer is made of copper or copper alloy, which is not conventionally used to connect conductors made of copper or copper alloy. It is possible to use the connector and terminal 3 as they are, and it is also possible to use a fixing method such as crimping, for example. Moreover, by configuring a part of the conductor 21 with the second conductor 21b made of copper or a copper alloy, the electrical conductivity and heat resistance of the conductor 21 can be improved, and mechanical strength such as tensile strength can also be improved.

Although the case where the first conductor 21a and the second conductor 21b are braided conductors has been described here, the first conductor 21a and the second conductor 21b are made by weaving a plurality of metal wires together using a loom or the like to form a band shape. It may be something that has been done. That is, in this specification, the expression "constructed by interweaving metal strands" includes interweaving metal strands.

The insulator 22 is for protecting the conductor 21, and is made of a resin composition whose main component is at least one resin selected from, for example, polyvinyl chloride resin, polyolefin resin, fluororesin, polyurethane resin, etc. The thickness of the insulator 22 is preferably 0.8 mm or more and 2.0 mm or less. By setting the thickness of the insulator 22 to 0.8 mm or more, the mechanical strength of the insulator 22 can be ensured, and by setting the thickness of the insulator 22 to 2.0 mm or less, the flat electric wire 2 can be easily bent. can do.

The insulator 22 is coated around the conductor 21 by insert extrusion. This allows the surface of the conductor 21 and the inner surface of the insulator 22 to be brought into close contact with each other to the extent that the conductor 21 can move within the insulator 22 when the flat electric wire 2 is bent, making it easier to bend the flat electric wire 2. Become.

In this embodiment, the ratio (W/H) between the thickness H and the width W of the flat electric wire 2 is 4 or more. This makes the flat electric wire 2 more flat, making it easier to bend the flat electric wire 2. Here, the thickness H of the flat electric wire 2 was 6.1 mm, the width W was 30 mm, and the ratio (W/H) thereof was approximately 4.9. Note that the ratio (Wd/Hd) between the thickness (maximum thickness) Hd and the width (maximum width) Wd of the conductor 21 is also desirably 4 times or more.

(Terminal 3)
The terminal 3 is provided at at least one end of the flat electric wire 2. FIG. 1A shows a case where terminals 3 are provided at both ends of the flat electric wire 2. In FIG. The terminal 3 is provided at a fixing part (hereinafter referred to as a crimping part) 31 that is fixed to the end of the conductor 21 exposed from the end of the insulator 22 by a fixing method such as crimping, and to a device 11 such as a control panel. This is a crimp terminal that integrally includes a flat connecting portion 32 for fixing to a connected member such as the electrode 11a (see FIG. 2(a)) with a bolt or the like. Note that the terminal 3 may be fixed to the conductor 21 by a method other than crimping.

The caulking portion 31 is formed into a cylindrical shape, and is fixed to the conductor 21 by caulking with the conductor 21 inserted therein. The connecting portion 32 extends outward from the crimping portion 31 in the longitudinal direction of the flat electric wire 2 . The connecting portion 32 is formed into a flat plate shape, and a through hole 32a for passing a bolt is formed in the center thereof.

In the terminal-equipped flat electric wire 1 according to the present embodiment, the terminal 3 is provided so that the normal direction of the connecting portion 32 intersects the thickness direction of the flat electric wire 2. More specifically, the terminal 3 is provided so that the normal direction of the connecting portion 32 is perpendicular to the thickness direction of the flat electric wire 2 (parallel to the width direction).

This makes it possible to wire by bending the flat electric wire 2 in the thickness direction, as shown in FIG. become. Note that the angle of the normal direction of the connecting portion 32 with respect to the thickness direction of the flat electric wire 2 can be adjusted as appropriate depending on the shape and orientation of the electrode 11a provided in the device 11. On the other hand, for example, in the case of a conventional flat electric wire 1 with a terminal in which the terminal 3 is provided so that the normal direction of the connecting portion 32 is parallel to the thickness direction of the flat electric wire 2, as shown in FIG. As shown in the figure, the flat wire 2 must be twisted. Therefore, the flat electric wire 2 is likely to meander and interfere with (contact) the device 11, creating a risk that the flat electric wire 2 may be damaged. According to the present embodiment, such problems can be suppressed and wiring can be easily performed even in a narrow space between the devices 11.

That is, the angle between the normal direction of the connecting part 32 and the thickness direction of the flat electric wire 2 (=the angle between the normal direction of the connecting part 32 and the thickness direction of the flat electric wire 2) is the normal direction of the connecting part 32. When the wire direction and the thickness direction of the flat electric wire 2 are perpendicular to each other, it is 90 degrees, and when the normal direction of the connecting portion 32 and the thickness direction of the flat electric wire 2 are parallel, it is 0 degrees. 3, it is possible to adjust the direction of the connecting portion 32 so that the angle is greater than 0 degrees and less than 90 degrees. As a result, as shown in FIG. 2(a), the terminal-equipped flat electric wire 1 is less prone to meandering or twisting during wiring, and wiring can be performed in accordance with the shape and orientation of the electrode 11a provided in the device 11. becomes.

Although the case where the terminal 3 is provided so that the normal direction of the connecting portion 32 intersects with the thickness direction of the flat electric wire 2 has been described here, the terminal 3 is not limited to this, and may be provided as shown in FIG. Furthermore, the normal direction of the connecting portion 32 may be parallel to the thickness direction of the flat electric wire 2. The direction of the connecting portion 32 can be determined as appropriate by adjusting the normal direction of the connecting portion 32 within the range of the angle formed by the width direction and the thickness direction, depending on the arrangement of the electrodes 11a to be connected. Selectable.

(Shape of end of heat shrink tube 4 and flat electric wire 2)
The heat-shrinkable tube 4 as a covering member is provided at the end of the flat electric wire 2 so as to cover the area from the insulator 22 to the crimped portion 31 of the terminal 3 all at once. More specifically, the heat shrink tube 4 collectively covers the conductor 21 exposed between the insulator 22 and the terminal 3, at least a portion of the crimped portion 31 of the terminal 3, and the tip of the insulator 22. It is designed to cover. The heat shrink tube 4 plays the role of covering and insulating the exposed conductor 21 and suppressing moisture, dust, etc. from entering the flat electric wire 2.

In this embodiment, the conductors 21 exposed from the insulator 22 of the flat electric wire 2 are bundled and fixed by the crimping part 31. The width of the conductor 21 at is reduced. The heat-shrinkable tube 4 is provided so as to be in close contact with the periphery of the exposed conductor 21 with as few gaps as possible. Therefore, between the insulator 22 and the terminal 3, the outer shape of the heat-shrinkable tube 4 becomes a tapered shape whose width decreases as it approaches the terminal 3. Hereinafter, the portion of the conductor 21 exposed between the tip of the insulator 22 and the tip of the terminal 3 to which the terminal 3 is not fixed will be referred to as a non-crimped portion (or non-fixed portion) 5. To call. By configuring the outer shape of the heat-shrinkable tube 4 that covers the non-crimped portion 5 into a tapered shape, it becomes possible to bend the flat electric wire 2 in the width direction at the non-crimped portion 5. Meandering and twisting can be made less likely to occur, making wiring work easier. Furthermore, by sufficiently shrinking the heat-shrinkable tube 4 so as to tightly fit around the exposed conductor 21, the heat-shrinkable tube 4 can be prevented from floating off the surface of the insulator 22 when it is bent. It is possible to prevent the heat-shrinkable tube 4 from becoming loose or misaligned. Note that in this embodiment, the heat-shrinkable tube 4 is not filled with adhesive.

In order to make the non-crimped part 5 easier to bend and the wiring work easier, the length of the non-crimped part 5 (that is, the length of the flat electric wire 2 from the tip of the insulator 22 to the tip of the crimped part 31) is It is desirable that the length (along the direction) L be as long as possible. Furthermore, if the length L of the non-crimped portion 5 is too short, the flat electric wire 2 tends to bend into an arched shape when viewed from the longitudinal direction when the conductors 21 are bundled. As a result, when the heat-shrinkable tube 4 is installed, a gap is created between the heat-shrinkable tube 4 and the insulator 22, and moisture and dust are likely to enter through the gap, which may reduce connection reliability. . Therefore, the length L of the non-crimped portion 5 is preferably at least the width W of the flat electric wire 2 or more.

(Modified example)
FIGS. 4A and 4B are cross-sectional views showing a modified example of the flat electric wire 2. FIG. As shown in FIGS. 4A and 4B, the flat electric wire 2 may further include a band-like or linear shape-retaining member 23 provided around the conductor 21 for shape-retaining.

FIG. 4A shows a case where linear shape retaining members 23a are used, and a pair of shape retaining members 23a are arranged so as to sandwich the conductor 21 in the width direction. As the linear shape retaining member 23a, for example, an annealed copper wire, an aluminum wire, or the like can be used. Note that the number and arrangement positions of the shape-retaining members 23a to be used are not limited to those shown in the drawings.

FIG. 4(b) shows a case where a band-shaped shape retaining member 23b is used, and the shape retaining member 23b is arranged so as to be adjacent to the conductor 21 in the thickness direction (adjacent to the second conductor 21b). has been done. For example, a copper plate can be used as the band-shaped shape retaining member 23b.

By having the shape retaining member 23, it becomes possible to retain the shape of the flat electric wire 2 in a state where it is bent into a desired shape, and wiring along a desired wiring layout becomes easier. In the illustrated example, the shape-retaining member 23 is provided between the conductor 21 and the insulator 22, and the shape-retaining member 23 and the conductor 21 are in contact with each other. The shape retaining member 23 may be spaced apart. That is, the insulator 22 may exist between the conductor 21 and the shape retaining member 23.

(Actions and effects of embodiments)
As explained above, in the flat electric wire 2 according to the present embodiment, the conductor 21 includes a strip-shaped first conductor 21a configured by interweaving first wires made of aluminum or aluminum alloy, and at least a conductor The conductor 21 is provided so as to sandwich the first conductor 21a in the thickness direction of the conductor 21, and has a second conductor 21b constructed by interweaving second wires made of copper or a copper alloy.

Since the conductor 21 has the first conductor 21a made of aluminum or aluminum alloy, the amount of expensive copper used can be reduced, and the flat electric wire is low cost, lightweight, easy to bend, and easy to maintain its bent shape. 2 can be achieved. Furthermore, by providing the second conductor 21b made of copper or copper alloy so as to sandwich the first conductor 21a in the thickness direction, the first conductor 21a can be protected by the second conductor 21b, and the connector can be It can be easily connected to the terminal 3, and the electrical conductivity, heat resistance, and mechanical strength of the conductor 21 can be improved.

Since the conductor 21 has the first conductor 21a made of aluminum or aluminum alloy, the flat electric wire 2 can be easily bent in the thickness direction, so that the flat electric wire 2 can be easily bent even in narrow gaps between devices 11 such as control panels. Wiring can be done without twisting or twisting, making wiring work easier. In other words, according to this embodiment, it is possible to realize a flat electric wire 2 that is easy to bend and wire. Furthermore, compared to conventional busbars that have been used as wiring materials for power supply between the devices 11, the flat electric wire 1 with terminals can be wired in various wiring layouts and is highly versatile. Therefore, it is possible to provide low-cost wiring materials when updating equipment, etc.

(Other embodiments)
In the above embodiment, a case has been described in which the second conductor 21b is provided so as to cover the entire periphery of the first conductor 21a. However, the present invention is not limited to this, and as shown in FIG. The conductor 21 may be configured using the conductor 21b such that the first conductor 21a is sandwiched between a pair of second conductors 21b in the thickness direction of the conductor 21. With this configuration, it is possible to make the width smaller, although the thickness becomes larger, compared to the case of FIG. 1(c). Depending on the shape of the wiring space, etc., it is possible to appropriately select whether the flat electric wire 2 has the structure shown in FIG. 1(c) or the structure shown in FIG. Hereinafter, for the sake of distinction, the flat electric wire 2 in FIG. 1(c) will be referred to as a first flat electric wire 2a, and the flat electric wire 2 in FIG. 5 will be referred to as a second flat electric wire 2b.

Furthermore, two or more flat electric wires 2 may be connected and used. In this case, it is naturally possible to connect the first flat electric wire 2a and the second flat electric wire 2b. For example, as shown in FIG. 6(a), a terminal 3 provided at the end of the first flat electric wire 2a and a terminal 3 provided at the end of the second flat electric wire 2b are fixed to each other with bolts or the like. By doing so, a connection structure may be obtained in which both flat electric wires 2a and 2b are connected. Further, as shown in FIG. 6(b), a cylindrical crimping fitting 6 is used, and the crimping fitting 6 is held in a state in which the tips of the conductors 21 of both flat electric wires 2a and 2b are butted against each other or overlapped. By crimping and fixing both conductors 21, a connection structure may be used in which both flat electric wires 2a and 2b are connected. Then, the range from the insulator 22 of the first flat electric wire 2a to the insulator 22 of the second flat electric wire 2b via the crimping metal fitting 6 is covered so as to cover the periphery of the connected portion connected by the crimping metal fitting 6. It is preferable that a heat-shrinkable tube 4 is provided at the bottom.

Furthermore, in order to further strengthen the connection between both flat electric wires 2a and 2b, as shown in FIG. 7, only a predetermined length of the first conductor 21a is cut at the end of the second flat electric wire 2b. A space surrounded by the second conductor 21b is formed in the cut portion, the conductor 21 of the first flat electric wire 2a is inserted into the space, and the conductor 21 is connected to the second conductor 21 of the pair of second flat electric wires 2b. A connection structure may be used in which the conductors 21b are sandwiched in the thickness direction, and the overlapping portions of both conductors 21 are crimped and fixed with the second conductors 21 of both conductors 21 in contact with each other. Although not shown, a heat shrink tube 4 as shown in FIG. 6(b) may be provided so as to cover the periphery of the connected portions connected by crimping. Note that, contrary to FIG. 7, by cutting off a predetermined length of the first conductor 21a of the first flat electric wire 2a, a space surrounded by the second conductor 21b is formed in the cut portion, and in that space, The connection structure may be such that the conductor 21 of the second flat electric wire 2b is inserted and fixed by crimping.

In the connection structures shown in FIGS. 6 and 7, the flat electric wire 2 (first flat electric wire 2a) shown in FIG. 1(c) and the flat electric wire 2 (second flat electric wire 2b) shown in FIG. Although the connection structure in which the flat electric wires 2 (first flat electric wires 2a) shown in FIG. A connection structure may be used in which the type electric wires 2 (second flat type electric wires 2b) are connected to each other.

FIG. 8(a) is a sectional view showing a modification of the flat electric wire 2, and FIG. 8(b) is a perspective view showing a modification of the flat electric wire 1 with a terminal. As shown in FIG. 8(a), the flat electric wire 2 may further include a linear insulated wire 24 in which an insulated covering portion 24b is provided around the conducting wire 24a. The insulated wire 24 is arranged inside the insulator 22 in parallel with the conductor 21 along the longitudinal direction of the conductor 21. The insulated wire 2 is arranged in line with the conductor 21 in the width direction.

The conducting wire 24a is made of a metal wire made of copper, copper alloy, aluminum, aluminum alloy, or the like, for example. For example, like the insulator 22, the insulating coating portion 24b is made of a resin composition containing a resin such as polyvinyl chloride resin as a main component.

As shown in FIG. 8(b), the insulated wire 24 is arranged at the end of the terminal-equipped flat electric wire 1 so as to protrude from the tip of the heat-shrinkable tube 4. At this time, the insulated wire 24 is arranged along the fixing part (crimping part) 31 of the terminal 3, and is covered with the heat shrink tube 4 together with the clamping part 31. A connection terminal 6 is connected to the tip of the insulated wire 24, and the insulated wire 24 can be connected to a control electrode or a grounding electrode of the device 11, or to a device other than the device 11 via the connection terminal 6. Connected.

Since the flat electric wire 2 has the insulated wire 24, when wiring the insulated wire 24 and the flat electric wire 2 between the devices 11 shown in FIG. Compared to the case where the type electric wire 2 is wired separately, the wiring space can be reduced, wiring workability is improved, and the degree of freedom in wiring layout is also improved. Although FIGS. 8A and 8B illustrate the case where one insulated wire 24 is provided, the present invention is not limited to this, and a plurality of insulated wires 24 may be provided. For example, a pair of insulated wires 24 may be provided to sandwich the conductor 21 in the width direction. Furthermore, it is not essential that the terminals 3 and 6 be separate bodies, and a connector in which both the terminals 3 and 6 are integrated may be provided at the end of the flat electric wire 2.

(Summary of embodiments)
Next, technical ideas understood from the embodiments described above will be described using reference numerals and the like in the embodiments. However, each reference numeral in the following description does not limit the constituent elements in the claims to those specifically shown in the embodiments.

[1] A strip-shaped conductor (21) and an insulator (22) covering the periphery of the conductor (21), the conductor (21) being a first strand made of aluminum or an aluminum alloy. The first conductor (21a) is made of copper or a copper alloy, and is provided so as to sandwich the first conductor (21a) in the thickness direction of the conductor (21). A flat electric wire (2) having a second conductor (21b) configured by interweaving second strands.

[2] The flat electric wire (2) according to [1], wherein the second conductor (21b) is formed in a cylindrical shape so as to cover the entire periphery of the first conductor (21a).

[3] The conductor (21) has a pair of second conductors (21b) formed in a band shape, and the first conductor (21a) is connected to the pair of second conductors (21b) in the thickness direction of the conductor (21). The flat electric wire (2) according to [1], which is configured by sandwiching the second conductor (21b).

[4] The flat electric wire (2) according to any one of [1] to [3], wherein the ratio of thickness H to width W (W/H) is 4 or more.

[5] The flat panel according to any one of [1] to [3], further comprising a shape-retaining band-like or linear shape-retaining member (23) provided around the conductor (21). Type electric wire (2).

[6] The conductor (21) meets any one of [1] to [3], wherein the outer diameter of the first strand (21a) is larger than the outer diameter of the second strand (21b). The flat electric wire (2) described.

[7] A flat electric wire with a terminal (1) comprising a flat electric wire (2) and a terminal (3) provided at at least one end of the flat electric wire (2), The flat electric wire (2) includes a band-shaped conductor (21) and an insulator (22) covering the periphery of the conductor (21), and the conductor (21) is made of aluminum or aluminum alloy. A band-shaped first conductor (21a) formed by interweaving first strands of A flat electric wire (1) with a terminal, comprising a second conductor (21b) formed by interweaving second wires made of copper or copper alloy.

[8] A portion of the conductor (21) exposed between the tip of the insulator (22) and the tip of the terminal (3), to which the terminal (3) is not fixed. The flat electric wire (1) with a terminal according to [7], wherein the length of the non-crimped portion (5) which is the conductor (21) is equal to or longer than the width of the flat electric wire (2).

[9] A covering member (4) provided to collectively cover the non-crimped portion (5), at least a portion of the terminal (3), and the periphery of the end of the insulator (22). , the terminal-equipped flat electric wire (1) according to [8], wherein the covering member (4) covering the non-crimped portion (5) has a tapered outer shape.

Although the embodiments of the present invention have been described above, the embodiments described above do not limit the invention according to the claims. Furthermore, it should be noted that not all combinations of features described in the embodiments are essential for solving the problems of the invention. Moreover, the present invention can be implemented with appropriate modifications within a range that does not depart from the spirit thereof.

1...Flat electric wire with terminal 2...Flat electric wire 21...Conductor 21a...First conductor 21b...Second conductor 22...Insulator 23...Shape retaining member 3...Terminal 4...Heat shrink tube (covering member)

Claims (9)

A strip-shaped conductor,
an insulator covering the periphery of the conductor;
The conductor is
a belt-shaped first conductor configured by interweaving first wires made of aluminum or aluminum alloy;
at least a second conductor that is provided to sandwich the first conductor in the thickness direction of the conductor and is configured by interweaving second strands made of copper or copper alloy;
Flat electric wire. The second conductor is formed in a cylindrical shape so as to cover the entire periphery of the first conductor.
The flat electric wire according to claim 1. The conductor is
having a pair of said second conductors formed in a band shape,
The first conductor is sandwiched between a pair of the second conductors in the thickness direction of the conductor.
The flat electric wire according to claim 1. The ratio of thickness H to width W (W/H) is 4 or more,
The flat electric wire according to any one of claims 1 to 3. further comprising a shape-retaining band-like or linear shape-retaining member provided around the conductor;
The flat electric wire according to any one of claims 1 to 3. In the conductor, the outer diameter of the first strand is larger than the outer diameter of the second strand,
The flat electric wire according to any one of claims 1 to 3. A flat electric wire with a terminal, comprising a flat electric wire and a terminal provided at at least one end of the flat electric wire,
The flat electric wire is
A strip-shaped conductor,
an insulator covering the periphery of the conductor;
The conductor is
a belt-shaped first conductor configured by interweaving first wires made of aluminum or aluminum alloy;
at least a second conductor that is provided to sandwich the first conductor in the thickness direction of the conductor and is configured by interweaving second strands made of copper or copper alloy;
Flat wire with terminal. The length of the non-crimped portion of the conductor exposed between the tip of the insulator and the tip of the terminal and to which the terminal is not fixed is determined by the flat length. Width greater than the type wire,
The flat electric wire with a terminal according to claim 7. a covering member provided to collectively cover the non-crimped portion, at least a portion of the terminal, and the tip of the insulator;
The outer shape of the covering member that covers the non-crimped portion is tapered.
The flat electric wire with a terminal according to claim 8.

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