Wiring member

Abstract

The purpose of the present invention is to provide a technology by which it is possible to reduce the thickness of a laminated wiring member. This wiring member comprises: a first wiring body that includes an enamel wire and a first base member that holds the enamel wire; and a second wiring body that includes a linear transmission member and a second base member that holds the linear transmission member. The first wiring body and the second wiring body are laminated in the thickness direction of the first base member and the thickness direction of the second base member. The enamel wire has a conductor and an enamel coating layer covering the periphery of the conductor. The linear transmission member has a transmission line body and an extrusion coating layer formed by extrusion-molding a resin around the transmission line body. The enamel wire is thinner than the linear transmission member.

Description

Wiring materials

[0001] The present disclosure relates to a wiring member.

[0002] Japanese Patent Application Laid-Open No. 2003-144222 discloses a multilayer wiring member in which a plurality of wiring bodies are stacked.

[0003] Japanese Patent Application Laid-Open No. 2021-68577

[0004] It is desirable that the thickness of a laminated wiring member is small.

[0005] Therefore, an object of the present invention is to provide a technique that can reduce the thickness of a laminated wiring member.

[0006] The wiring member of the present disclosure comprises: a first wiring body including an enameled wire and a first base member that holds the enameled wire; and a second wiring body including a linear transmission member and a second base member that holds the linear transmission member, wherein the first wiring body and the second wiring body are stacked in the thickness direction of the first base member and the thickness direction of the second base member; the enameled wire has a conductor and an enamel coating layer that covers the conductor; and the linear transmission member has a transmission line main body and an extruded coating layer in which a resin is extruded around the transmission line main body, and the enameled wire is thinner than the linear transmission member.

[0007] According to the present disclosure, the thickness of the laminated wiring member can be reduced.

[0008] Fig. 1 is a schematic plan view showing a wiring member according to embodiment 1. Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1. Fig. 3 is an enlarged cross-sectional view showing a first wiring body. Fig. 4 is an enlarged cross-sectional view showing a second wiring body. Fig. 5 is an explanatory diagram showing a process for manufacturing the first wiring body.

[0009] [Description of Embodiments of the Present Disclosure] First, embodiments of the present disclosure will be listed and described.

[0010] The wiring member of the present disclosure is as follows.

[0011] (1) A wiring member comprising: a first wiring body including an enameled wire and a first base member that holds the enameled wire; and a second wiring body including a linear transmission member and a second base member that holds the linear transmission member, wherein the first wiring body and the second wiring body are stacked in the thickness direction of the first base member and the thickness direction of the second base member; the enameled wire has a conductor and an enamel coating layer that covers the conductor; the linear transmission member has a transmission line body and an extruded coating layer formed by extruding a resin around the transmission line body; and the enameled wire is a wiring member that is thinner than the linear transmission member.

[0012] According to the wiring member of (1), in the wiring member in which a plurality of wiring bodies are stacked, some of the wiring bodies are made of enameled wires that are thinner than the linear transmission members, so that the thickness of the wiring member can be reduced.

[0013] (2) In the wiring member of (1), the enameled wire may be held in the first base member by embedding a region of the enameled wire over half its circumference in the first base member, and the resin of the extruded coating layer may be fused to the resin of the second base member to hold the linear transmission member in the second base member. By embedding the enameled wire in the first base member, the thickness of the first wiring body can be reduced, thereby reducing the thickness of the wiring member. Furthermore, the enameled wire and the linear transmission member can be easily held in the base member in a manner appropriate for each. Specifically, when the enameled wire is embedded over half its circumference or more, the smaller the embedding height, the less energy is required for embedding. Because the enameled wire is thinner than the linear transmission member, the embedding height can be smaller when the enameled wire is embedded than when the linear transmission member is embedded. As a result, the enameled wire is easier to embed than the linear transmission member. In the case of fusion, the larger the fused area in the circumferential direction, the stronger the retention strength. Because linear transmission components are thicker than enameled wires, it is easier to increase the fused area in the circumferential direction than when fusing enameled wires. As a result, linear transmission components are easier to retain by fusion than enameled wires.

[0014] (3) In the wiring member of (2), the first base member may have higher rigidity than the second base member. This prevents the first base member from bending in the thickness direction when the enamel wire is embedded in the first base member. Furthermore, the high rigidity of the first base member makes it easier for the first wiring body to maintain the shape of the wiring member.

[0015] (4) In the wiring member of (3), at least one of the first wiring body and the second wiring body may be provided in two or more layers, and the first wiring body may be located in the outermost layer in the stacking direction. This makes it easier to maintain the shape of the wiring member by positioning the first wiring body including the highly rigid first base member in the outermost layer.

[0016] (5) In the wiring member of any one of (1) to (4), the second wiring body may be provided in two or more layers, the two or more layers of the second wiring body may include a first layer and a second layer, and the diameter of the linear transmission member of the second layer may be larger than the diameter of the linear transmission member of the first layer. This allows the second wiring body to be divided into layers according to the diameter of the linear transmission member.

[0017] (6) In any one of the wiring members described in (1) to (4), the second wiring body may be provided in two or more layers, the two or more second wiring bodies may be separated into layers based on the conductor cross-sectional area of ​​the linear transmission member, and the layer having the linear transmission member with the largest conductor cross-sectional area among the two or more second wiring bodies may be located on the outermost layer in the stacking direction. Linear transmission members with large conductor cross-sectional areas tend to generate a large amount of heat. Even in this case, by locating the layer having the linear transmission member with the largest conductor cross-sectional area on the outermost layer in the stacking direction, the heat dissipation of the linear transmission member with the largest conductor cross-sectional area is improved.

[0018] (7) A wiring member according to the present disclosure includes a first wiring body including a first linear transmission member and a first base member that holds the first linear transmission member, and a second wiring body including a second linear transmission member and a second base member that holds the second linear transmission member, wherein the first wiring body and the second wiring body are stacked in a thickness direction of the first base member and a thickness direction of the second base member, the first linear transmission member has a first transmission line body and a first covering layer that covers the first transmission line body, and the second linear transmission member is a second transmission line body and a second coating layer formed by extruding resin around the second transmission line body, wherein the first linear transmission member is thinner than the second linear transmission member, and a region of at least half the circumference of the first linear transmission member is embedded in the first base member, thereby holding the first linear transmission member to the first base member, and the resin of the second coating layer is fused to the resin of the second base member, thereby holding the second linear transmission member to the second base member.

[0019] According to the wiring member (7), in a wiring member in which multiple wiring bodies are stacked, some wiring bodies are formed by first linear transmission members that are thinner than the second linear transmission members, thereby reducing the thickness of the wiring member. Furthermore, by embedding the first linear transmission member in the first base member, the thickness of the first wiring body can be reduced, thereby reducing the thickness of the wiring member. In this case, by changing the holding manner of the first linear transmission member and the second linear transmission member, the first linear transmission member and the second linear transmission member can be easily held in the base member in a holding manner appropriate for each. Specifically, in the case of burying, the smaller the burying height when burying more than half a circumference, the less energy is required for burying. Because the first linear transmission member is thinner than the second linear transmission member, the burying height can be smaller when burying the first linear transmission member than when burying the second linear transmission member. As a result, the first linear transmission member is easier to hold when buried than the second linear transmission member. In the case of fusion, the larger the fused area in the circumferential direction, the stronger the retention strength. Because the second linear transmission member is thicker than the first linear transmission member, it is easier to increase the fused area in the circumferential direction than when the first linear transmission member is fused. As a result, the second linear transmission member is easier to retain by fusion than the first linear transmission member.

[0020] [Details of the embodiment of the present disclosure] Specific examples of the wiring member of the present disclosure will be described below with reference to the drawings. Note that the present disclosure is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims.

[0021] [First Embodiment] A wiring member 10 according to a first embodiment will be described below. Fig. 1 is a schematic plan view showing the wiring member 10 according to the first embodiment. Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1. Fig. 3 is an enlarged cross-sectional view showing a first wiring body 20. Fig. 4 is an enlarged cross-sectional view showing a second wiring body 30. Fig. 5 is an explanatory diagram showing the manufacturing process of the first wiring body 20.

[0022] The wiring member 10 includes a first wiring body 20 and a second wiring body 30. The first wiring body 20 includes a first linear transmission member 21 and a first base member 24. The first linear transmission member 21 has a first transmission line main body 22 and a first covering layer 23. The first covering layer 23 covers the first transmission line main body 22. The first base member 24 holds the first linear transmission member 21. The second wiring body 30 includes a second linear transmission member 31 and a second base member 34. The second linear transmission member 31 has a second transmission line main body 32 and a second covering layer 33. The second covering layer 33 covers the second transmission line main body 32. The second base member 34 holds the second linear transmission member 31.

[0023] Each linear transmission member 21, 31 is a linear member that transmits electricity, light, etc. Each base member 24, 34 is a sheet-like member formed into a flat shape overall. In each wiring body 20, 30, multiple linear transmission members 21, 31 are fixed to the base member 24, 34, thereby maintaining each wiring body 20, 30 in a flat shape.

[0024] The linear transmission members 21, 31 are assumed to be components that connect components in a vehicle. For example, a connector is provided at the end of the linear transmission members 21, 31. The connector is connected to a connector provided on a mating component, thereby connecting the linear transmission members 21, 31 to the mating component. In other words, the wiring member 10 is used as a wiring member 10 that electrically (or optically) connects various components in a vehicle or the like. The first linear transmission member 21 and the second linear transmission member 31 may be connected to the same connector. The first linear transmission member 21 and the second linear transmission member 31 may be connected to different connectors. The first linear transmission member 21 and the second linear transmission member 31 may branch off on their way to different connectors. Each linear transmission member 21, 31 may extend outward from the outer edge of the base member 24, 34. The connector may or may not be fixed to the base member 24, 34.

[0025] The paths of the linear transmission members 21, 31 are set depending on the positions of the components to which they are connected. By fixing the linear transmission members 21, 31 to the base members 24, 34, the linear transmission members 21, 31 are maintained along wiring paths depending on the positions of the components to which they are connected. The multiple linear transmission members 21, 31 may be fixed to the base members 24, 34 in a manner in which branch lines branch off from a trunk line. The base members 24, 34 may also be formed in a shape in which the portions to which the branch lines are fixed branch off from the portion to which the trunk line is fixed.

[0026] As described above, the linear transmission members 21 and 31 may be any linear member that transmits electricity, light, etc. For example, the linear transmission members 21 and 31 may be a general electric wire having a conductor core and an insulating coating layer surrounding the conductor core, or may be a bare conductor, a shielded wire, a twisted wire, an enameled wire, a nichrome wire, an optical fiber, etc.

[0027] The linear transmission members 21, 31 that transmit electricity may be various signal lines or various power lines. A part of the linear transmission members 21, 31 that transmit electricity may be used as an antenna, a coil, or the like that sends or receives a signal or power to or from space.

[0028] Furthermore, the linear transmission members 21, 31 may be a single linear object, or a composite of multiple linear objects (such as a twisted wire or a cable made up of multiple linear objects covered with a sheath).

[0029] The base members 24, 34 may be resin sheets. For example, the base members 24, 34 may be formed from resins such as polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET). The base members 24, 34 may also be nonwoven fabrics, foam sheets, or the like. The base members 24, 34 may have a single-layer structure or a multi-layer structure. The base members 24, 34 may also have a metal layer.

[0030] The linear transmission members 21, 31 may be held by the base members 24, 34, and the structure for holding the linear transmission members 21, 31 relative to the base members 24, 34 is not particularly limited. Such holding may be by contact-site fixation, non-contact-site fixation, or a combination of both. Here, contact-site fixation refers to fixation at contacting portions between the linear transmission members 21, 31 and the base members 24, 34. Non-contact-site fixation refers to fixation that is not by contact-site fixation, such as by using sewing thread, a cover, adhesive tape, or the like to press the linear transmission members 21, 31 toward the base members 24, 34 or by sandwiching the linear transmission members 21, 31 and the base members 24, 34 together to maintain that state.

[0031] The manner of fixing the contact portions may be indirect fixing of the contact portions, direct fixing of the contact portions, or a combination of both in different regions. Here, indirect fixing of the contact portions refers to the linear transmission members 21, 31 and the base members 24, 34 being indirectly fixed to each other via an adhesive, pressure-sensitive adhesive, double-sided adhesive tape, or the like provided therebetween. Direct fixing of the contact portions refers to the linear transmission members 21, 31 being directly fixed to the base members 24, 34 without the use of a separate adhesive or the like. In direct fixing of the contact portions, for example, the linear transmission members 21, 31 and the base members 24, 34 may be fixed to each other by melting a resin contained in at least one of the linear transmission members 21, 31 and the base members 24, 34.

[0032] When such a state of direct fixation of the contact regions is formed, the resin may be melted by, for example, heat or a solvent. That is, the state of direct fixation of the contact regions may be a state of direct fixation of the contact regions by heat or a state of direct fixation of the contact regions by a solvent. Preferably, the state of direct fixation of the contact regions is a state of direct fixation of the contact regions by heat.

[0033] The means for forming the state of direct fixation at the contact portions is not particularly limited, and known means such as welding, fusion, and welding can be used. For example, when forming the state of direct fixation at the contact portions by heat welding, various welding means such as ultrasonic welding, heat and pressure welding, hot air welding, and high-frequency welding can be used. Furthermore, when the state of direct fixation at the contact portions is formed by these means, the linear transmission members 21, 31 and the base members 24, 34 are directly fixed at the contact portions by that means. Specifically, for example, when the state of direct fixation at the contact portions is formed by ultrasonic welding, the linear transmission members 21, 31 and the base members 24, 34 are directly fixed at the contact portions by ultrasonic welding.

[0034] The linear transmission members 21, 31 may be fixed to the base members 24, 34 at a plurality of locations spaced apart along the longitudinal direction. The linear transmission members 21, 31 may also be fixed to the base members 24, 34 in a continuous manner along the longitudinal direction.

[0035] The first wiring body 20 and the second wiring body 30 are stacked in the thickness direction of the first base member 24 and the thickness direction of the second base member 34. At least one layer of the first wiring body 20 and one layer of the second wiring body 30 are provided. Therefore, the wiring member 10 has a stacked structure of at least two layers.

[0036] There are multiple differences between the first wiring body 20 and the second wiring body 30 that exhibit different characteristics from each other. The multiple differences include a first difference. The multiple differences include at least one of a second difference and a third difference. Here, the multiple differences include both the second difference and the third difference. Furthermore, here, the multiple differences include a fourth difference.

[0037] The first difference relates to the thickness of the linear transmission members 21, 31. Specifically, the first linear transmission member 21 is thinner than the second linear transmission member 31. For example, the cross sections of the first linear transmission member 21 and the second linear transmission member 31 are both circular. The diameter of the first linear transmission member 21 is a dimension that does not exceed the boundary value φ, and the diameter of the second linear transmission member 31 is a dimension that exceeds the boundary value φ. The diameter of the first linear transmission member 21 is less than the boundary value φ or is equal to or less than the boundary value φ. The diameter of the second linear transmission member 31 is equal to or greater than the boundary value φ. The boundary value φ is not particularly limited, but is, for example, any value between 0.15 mm and 1.0 mm.

[0038] Here, the first wiring body 20 includes a plurality of first linear transmission members 21. The plurality of first linear transmission members 21 have the same thickness. The plurality of first linear transmission members 21 may have different thicknesses within a predetermined range not exceeding the boundary value φ.

[0039] Here, the second wiring body 30 includes a plurality of second linear transmission members 31. The plurality of second linear transmission members 31 have different thicknesses within a predetermined range exceeding the boundary value φ. Here, the second linear transmission members 31 with different thicknesses are arranged in different layers. The plurality of second linear transmission members 31 may also have the same thickness.

[0040] The second difference relates to the types of coating layers 23, 33 of the linear transmission members 21, 31. Specifically, the first coating layer 23 is an enamel coating layer 23, and the second coating layer 33 is an extruded coating layer 33. The first linear transmission member 21 is an enameled wire 21 having a conductor 22 as a first transmission line body 22 and an enamel coating layer 23 as the first coating layer 23. The second linear transmission member 31 is an extruded coated wire having an extruded coating layer 33 as the second coating layer 33.

[0041] The enamel coating layer 23 is formed, for example, by baking an insulating paint applied around the conductor. The insulating paint is also called varnish. The enamel coating layer 23 is easier to make thinner than the extruded coating layer 33. The enameled wire 21 having the enamel coating layer 23 is easier to make thinner than the extruded coated wire having the extruded coating layer 33.

[0042] Typical enameled wires 21 include formal copper wire (PVF), polyurethane copper wire (UEW), polyester copper wire (PEW), polyesterimide copper wire (EIW), polyamideimide copper wire (AIW), and polyimide copper wire (PIW). PVF, UEW, PEW, EIW, AIW, and PIW differ from one another in the main components and heat resistance temperatures of the enamel coating layer 23, as shown below.

[0043] The main component of the PVF enamel coating layer 23 is polyvinyl formal. The maximum allowable temperature of PVF is 105°C. The heat resistance class of PVF is Class A.

[0044] The main component of the enamel coating layer 23 of UEW is polyurethane. The maximum allowable temperature of UEW is 120°C. The heat resistance class of UEW is Class E.

[0045] The main component of the enamel coating layer 23 of the PEW is polyester. The maximum allowable temperature of the PEW is 155°C. The heat resistance class of the PEW is Class F.

[0046] The main component of the enamel coating layer 23 of EIW is polyester-imide. The maximum allowable temperature of EIW is 180°C. The heat resistance class of EIW is H type.

[0047] The main component of the enamel coating layer 23 of AIW is polyamide-imide. The maximum allowable temperature of AIW is 200°C. The heat resistance class of AIW is Class N.

[0048] The main component of the enamel coating layer 23 of the PIW is polyimide. The maximum allowable temperature of the PIW is 220° C. The heat resistance class of the PIW is Class R.

[0049] Further, the enameled wire 21 may be, for example, UEW, which can be directly soldered to a wire with the enamel coating layer 23 attached without stripping off the enamel coating layer 23. The enameled wire 21 of the present disclosure may be, for example, UEW, which can be directly soldered to a wire with the enamel coating layer 23 attached without stripping off the enamel coating layer 23.

[0050] The enamel wire 21 of the wiring member 10 may be any one of PVF, UEW, PEW, EIW, AIW, and PIW. The enamel wire 21 of the wiring member 10 may be one or more selected from the group consisting of PVF, UEW, PEW, EIW, AIW, and PIW. The enamel wire 21 of the wiring member 10 may be an enamel wire 21 other than PVF, UEW, PEW, EIW, AIW, and PIW. The enamel wire 21 of the wiring member 10 may include enamel wire 21 other than PVF, UEW, PEW, EIW, AIW, and PIW.

[0051] When the enameled wire 21 is wound into a coil or the like, it is sometimes called a magnet wire or the like. The enameled wire 21 used as a magnet wire may also be used as the enameled wire 21 embedded in the first base member 24.

[0052] The extruded covering layer 33 is formed by extruding a resin around the second transmission line body 32. The resin constituting the extruded covering layer 33 may be, for example, PVC or a polyolefin such as PE or PP.

[0053] The third difference relates to the manner in which the linear transmission members 21, 31 are held relative to the base members 24, 34. Specifically, in the first wiring body 20, the first linear transmission member 21 is held by being embedded in the first base member 24. In the second wiring body 30, the second linear transmission member 31 is held by being fused to the second base member 34.

[0054] The first linear transmission member 21 (enameled wire 21) is held by the first base member 24 by embedding at least half of the circumference of the first linear transmission member 21 (enameled wire 21) in the first base member 24. The first base member 24 grips the first linear transmission member 21 at the embedded portion BP. When the first wiring body 20 is held in an embedded state, the thickness of the first base member 24 may be greater than the radius of the enameled wire 21. The thickness of the first base member 24 may also be greater than the diameter of the enameled wire 21. For example, the diameter of the enameled wire 21 may be 0.14 mm, and the thickness of the first base member 24 may be 0.25 mm.

[0055] A raised portion 25 is provided on the first base member 24 at the buried portion BP. The raised portion 25 is a portion of the first base member 24 that is raised outward from the base surface 26. In FIG. 3 , the base surface 26 is depicted by an imaginary line. The base surface 26 can be observed as a flat, uniform main surface on the first base member 24 before embedding. On the first base member 24 after embedding, the base surface 26 can be observed as a flat, uniform main surface at a portion away from the buried portion BP and unrelated to the buried portion BP (for example, at or near the outer edge of the first base member 24).

[0056] As shown in FIG. 5 , the first linear transmission member 21 is embedded by pressing the first linear transmission member 21 into the first base member 24 while the resin constituting the first base member 24 is in a softened state. The method for softening the resin constituting the first base member 24 is not particularly limited and can be appropriately selected. In the example shown in FIG. 5 , the resin is heated by applying ultrasonic vibrations using a horn 80. Specifically, the ultrasonic vibrations applied from the horn 80 to the first linear transmission member 21 ultrasonically vibrate the portion of the first base member 24 that is in contact with the first linear transmission member 21, generating heat and softening the portion. At this time, the horn 80 also functions as a press that presses the first linear transmission member 21 into the first base member 24 along the arrow A1 in FIG. 5 .

[0057] When the first linear transmission member 21 is pressed into the softened first base member 24, the resin in the portion where the first linear transmission member 21 is pressed moves, for example, in the direction of arrow A2 in Fig. 5 along the outer surface of the first linear transmission member 21. The resin that has moved in the direction of arrow A2 in Fig. 5 solidifies, thereby forming the protruding portion 25.

[0058] The first linear transmission member 21 is embedded in the first base member 24 over a region of at least half its circumference, including the portion embedded in the raised portion 25. Here, about three-quarters of the circumference of the first linear transmission member 21 is embedded in the first base member 24. Of this, about half the circumference of the first linear transmission member 21 is embedded in the base surface 26, and the remaining about one-quarter of the circumference is embedded in the raised portion 25.

[0059] Adjacent first linear transmission members 21 are separated by a gap. This results in raised portions 25 being provided on both sides of each first linear transmission member 21. The surface of each raised portion 25 approaches the base surface 26 as it moves laterally away from the portion that contacts the first linear transmission member 21. When the gap between adjacent first linear transmission members 21 is large, the base surface 26 appears between the raised portions 25 of adjacent first linear transmission members 21. Here, the gap between adjacent first linear transmission members 21 is set so that the raised portions 25 of adjacent first linear transmission members 21 are directly connected to each other without the base surface 26 interposed therebetween.

[0060] In the parallel arrangement direction of the first linear transmission members 21, the dimension of one raised portion 25 may be, for example, larger than the radius of the first linear transmission member 21 and smaller than the diameter of the first linear transmission member 21. In the parallel arrangement direction of the first linear transmission members 21, the interval between the first linear transmission members 21 may be equal to or larger than the diameter of the first linear transmission member 21.

[0061] The first covering layer 23 may or may not be fused to the first base member 24 at the embedded portion BP. Here, the first covering layer 23 and the first base member 24 are not fused due to the difference in resin material. Even if the first covering layer 23 and the first base member 24 are not fused, by embedding a region of at least half the circumference of the first linear transmission member 21 in the first base member 24, the first linear transmission member 21 is prevented from coming out of the embedded portion BP.

[0062] The cross-sectional shape of first linear transmission member 21 before burying may be a nearly perfect circle, and when burying, it is pressed in the thickness direction of first base member 24, so that it is crushed in the thickness direction of first base member 24 and assumes a shape that extends in the width direction of first base member 24. If horn 80 hits first linear transmission member 21, a mark of horn 80 may be formed on first linear transmission member 21 after burying.

[0063] In the second wiring body 30, the resin of the extruded covering layer 33 is fused to the resin of the second base member 34, thereby holding the second linear transmission member 31 to the second base member 34. Fusion is one form of direct fixation of the contact portion. The fused region may be an area less than halfway around the second covering layer 33. A raised portion 25 like the raised portion 25 may be formed on the second base member 34 at the fused portion FP. In the parallel arrangement direction of the second linear transmission members 31, the dimension of the raised portion 25 on the second base member 34 may be equal to or less than the radius of the second base member 34. In the parallel arrangement direction of the second linear transmission members 31, the distance between the second linear transmission members 31 may be equal to or less than the radius of the second linear transmission members 31.

[0064] When the holding mode in the second wiring body 30 is fusion bonding, the thickness of the second base member 34 can be set appropriately regardless of the diameter of the second linear transmission member 31. For example, the thickness of the second base member 34 may be the same as the diameter of the second linear transmission member 31. Also, for example, the thickness of the second base member 34 may be smaller or larger than the diameter of the second linear transmission member 31.

[0065] When the fusion is performed by ultrasonic fusion, the horn 80 may be applied to the second base member 34. A mark of the horn 80 may be formed on the second base member 34.

[0066] The cross-sectional shape of the second linear transmission member 31 at the fused portion FP may be closer to a perfect circle than the cross-sectional shape of the enameled wire 21 at the buried portion BP. "Close to a perfect circle" may be evaluated using the roundness expressed by the formula: roundness = (maximum diameter value - minimum diameter value) / 2. The roundness of the second linear transmission member 31 may be closer to 0 than the roundness of the enameled wire 21, so that the cross-sectional shape of the second linear transmission member 31 at the fused portion FP may be considered to be closer to a perfect circle than the cross-sectional shape of the enameled wire 21 at the buried portion BP.

[0067] The fourth difference relates to the rigidity of the base members 24, 34. Specifically, the first base member 24 has higher rigidity than the second base member 34. For example, the second base member 34 may have a rigidity that makes it easy to bend, and the first base member 24 may have a rigidity that makes it more difficult to bend than the second base member 34.

[0068] The difference in rigidity between the base members 24, 34 may be due to differences in material or structure. For example, the first base member 24 may be a solid sheet made of a hard resin. The hard resin may be, for example, PET, PP, rigid PVC, or ABS. A solid sheet has a cross-sectional structure in which the resin is uniformly filled, without the air bubbles found in a foamed sheet. The second base member 34 may be a solid sheet made of a soft resin. The soft resin may be, for example, flexible PVC. Alternatively, the second base member 34 may be a fibrous sheet such as a woven fabric, knitted fabric, or nonwoven fabric. The second base member 34 may have a two-layer structure consisting of a solid sheet made of a soft resin and a fibrous sheet.

[0069] The provision of the highly rigid first base member 24 improves the shape retention of the wiring member 10. This makes it easier for a worker to arrange the wiring member 10 along a predetermined path when assembling the wiring member 10 to a vehicle or the like.

[0070] Furthermore, in the stacking direction, the first wiring body 20 is located in the outermost layer. This allows the highly rigid first base member 24 to be disposed in the outermost layer of the wiring member 10. This allows a worker to easily grasp the first base member 24 and perform the assembly work when assembling the wiring member 10 to a vehicle or the like.

[0071] Furthermore, if the rigidity of the first base member 24 is high, the first base member 24 is less likely to bend more than necessary when embedding the first linear transmission member 21 in the first base member 24, making the embedding work easier. Furthermore, when applying ultrasonic vibrations to soften the first base member 24, portions other than the contact portions between the first base member 24 and the first linear transmission member 21 are less likely to be ultrasonically vibrated, improving energy efficiency.

[0072] Two or more layers of the first wiring body 20 or the second wiring body 30 may be provided, and the wiring member 10 may have a stacked structure of three or more layers. Here, two or more layers of the second wiring body 30 are provided. Here, an example is described in which one layer of the first wiring body 20 is provided, two layers of the second wiring body 30 are provided, and the wiring member 10 has a stacked structure of three layers. Two or more layers of each of the first wiring body 20 and the second wiring body 30 may be provided, and the wiring member 10 may have a stacked structure of four or more layers.

[0073] The second wiring body 30 of two or more layers is separated into layers based on the conductor cross-sectional area of ​​the second linear transmission member 31. The second wiring body 30 of two or more layers includes a second wiring body 30A of a first layer and a second wiring body 30B of a second layer. The second wiring body 30A of the first layer includes a second linear transmission member 31A and a second base member 34A. The second linear transmission member 31A has a second transmission line main body 32A and a second coating layer 33A. The second wiring body 30B of the second layer includes a second linear transmission member 31B and a second base member 34B. The second linear transmission member 31B has a second transmission line main body 32B and a second coating layer 33B. The diameter of the second linear transmission member 31B of the second layer is larger than the diameter of the second linear transmission member 31A of the first layer. Of the two or more layers of second wiring body 30, the second wiring body 30B of the layer (here, the second layer) having the second linear transmission member 31B with the largest conductor cross-sectional area is located as the outermost layer in the stacking direction.

[0074] The wiring member 10 includes an interlayer fixing portion 40 that fixes the layers together. Here, the interlayer fixing portion 40 is formed by fixing the side edge of the first base member 24 of the outermost layer to the side edge of the second base member 34B of the outermost layer. The side edge of the first base member 24 of the outermost layer to the side edge of the second base member 34B of the outermost layer is fixed by fusion bonding. The side edge of the first base member 24 of the outermost layer to the side edge of the second base member 34B of the outermost layer may also be fixed by a method other than fusion bonding, such as adhesive or staples. Here, the second base member 34A of the intermediate layer is also fixed by the interlayer fixing portion 40. The second base member 34A of the intermediate layer does not have to be fixed by the interlayer fixing portion 40. The second wiring body 30A of the intermediate layer may simply be sandwiched between the two wiring bodies 20, 30B of the outermost layers.

[0075] <Effects, etc.> According to the wiring member 10 configured as described above, in the wiring member 10 in which multiple wiring bodies 20, 30 are stacked, the first wiring body 20 is formed using an enamel wire 21 that is thinner than the second linear transmission member 31 in the second wiring body 30, so that the thickness of the first wiring body 20 can be reduced, and therefore the thickness of the wiring member 10 can be reduced.

[0076] Furthermore, by embedding at least half of the enamel wire 21 in the first base member 24, the enamel wire 21 is held in the first base member 24, and by fusing the resin of the extruded coating layer 33 with the resin of the second base member 34, the second linear transmission member 31 is held in the second base member 34. By embedding the enamel wire 21 in the first base member 24, the thickness of the first wiring body 20 can be reduced, thereby reducing the thickness of the wiring member 10. Furthermore, it is easy to hold the enamel wire 21 and the second linear transmission member 31 in the base members 24, 34 in a holding manner appropriate for each. Specifically, in the case of embedding, the smaller the embedding height when the wires are embedded at least halfway, the less energy is required for embedding. Because the enameled wire 21 is thinner than the second linear transmission member 31, the embedding height of the enameled wire 21 can be smaller than that of the second linear transmission member 31. This makes it easier to hold the enameled wire 21 in place by embedding it than the second linear transmission member 31. In the case of fusion, the larger the fused area in the circumferential direction, the higher the holding strength. Because the second linear transmission member 31 is thicker than the enameled wire 21, the larger the fused area in the circumferential direction can be made compared to when the enameled wire 21 is fused. This makes it easier to hold the second linear transmission member 31 in place by fusion than the enameled wire 21.

[0077] Furthermore, the first base member 24 has higher rigidity than the second base member 34. This makes it possible to prevent the first base member 24 from bending in the thickness direction when the enamel wire 21 is embedded in the first base member 24. Furthermore, the high rigidity of the first base member 24 makes it easier for the first wiring body 20 to maintain the shape of the wiring member 10. In this case, the first wiring body 20 is located in the outermost layer in the stacking direction. This makes it easier for the first wiring body 20, including the highly rigid first base member 24, to be located in the outermost layer, making it easier to maintain the shape of the wiring member 10.

[0078] Furthermore, the diameter of the second linear transmission member 31 in the second layer is larger than the diameter of the second linear transmission member 31 in the first layer. This allows the second wiring body 30 to be divided into layers according to the diameter of the second linear transmission member 31.

[0079] Furthermore, among the two or more layers of the second wiring body 30, the layer having the second linear transmission member 31 with the largest conductor cross-sectional area is located on the outermost layer in the stacking direction. The second linear transmission member 31 with the largest conductor cross-sectional area is likely to generate a large amount of heat. Even in this case, by locating the layer having the second linear transmission member 31 with the largest conductor cross-sectional area on the outermost layer in the stacking direction, the heat dissipation of the second linear transmission member 31 with the largest conductor cross-sectional area is improved.

[0080] [Note] The above-mentioned wiring member 10 is an example of a wiring member 10 in which, in a first wiring body 20 having a first linear transmission member 21 that is thinner than a second linear transmission member 31, the first linear transmission member 21 is embedded and held in a first base member 24, and in a second wiring body 30 having a second linear transmission member 31 that is thicker than the first linear transmission member 21, the second linear transmission member 31 is fused to and held in a second base member 34.

[0081] In this case, in the wiring member 10 in which a plurality of wiring bodies 20, 30 are stacked, some of the wiring bodies 20 are configured as first linear transmission members 21 that are thinner than the second linear transmission members 31, thereby reducing the thickness of the wiring member 10. Furthermore, by embedding the first linear transmission members 21 in the first base member 24, the thickness of the first wiring body 20 can be reduced, thereby reducing the thickness of the wiring member 10. In this case, by changing the holding manner of the first linear transmission members 21 and the second linear transmission members 31, it is easy to hold the first linear transmission members 21 and the second linear transmission members 31 in the base members 24, 34 in a holding manner that is appropriate for each. Specifically, in the case of burying, the smaller the burying height dimension when burying more than half a circumference, the less energy is required for burying. Because the first linear transmission member 21 is thinner than the second linear transmission member 31, the burial height dimension can be smaller when the first linear transmission member 21 is buried than when the second linear transmission member 31 is buried. As a result, the first linear transmission member 21 is easier to hold by burial than the second linear transmission member 31. In the case of fusion, the larger the fused area in the circumferential direction, the higher the holding strength. Because the second linear transmission member 31 is thicker than the first linear transmission member 21, the fused area in the circumferential direction can be made larger than when the first linear transmission member 21 is fused. As a result, the second linear transmission member 31 is easier to hold by fusion than the first linear transmission member 21.

[0082] The configurations described in the above embodiments and modifications can be combined as appropriate as long as they are not mutually contradictory.

[0083] 10 Wiring member 20 First wiring body 21 First linear transmission member (enameled wire) 22 First transmission line body (conductor) 23 First coating layer (enameled coating layer) 24 First base member 25 Protruding portion 26 Base surface 30, 30A, 30B Second wiring body 31, 31A, 31B Second linear transmission member (linear transmission member) 32, 32A, 32B Second transmission line body (transmission line body) 33, 33A, 33B Second coating layer (extruded coating layer) 34, 34A, 34B Second base member 40 Interlayer fixing portion 80 Horn BP Buried portion FP Fusion portion

Claims

1. A wiring member comprising: a first wiring body including an enameled wire and a first base member that holds the enameled wire; and a second wiring body including a linear transmission member and a second base member that holds the linear transmission member, wherein the first wiring body and the second wiring body are stacked in the thickness direction of the first base member and the thickness direction of the second base member, the enameled wire has a conductor and an enamel coating layer that covers the conductor, the linear transmission member has a transmission line body and an extruded coating layer formed by extruding a resin around the transmission line body, and the enameled wire is thinner than the linear transmission member.

2. A wiring member according to claim 1, wherein the enameled wire is held in the first base member by embedding at least half of its circumference in the first base member, and the resin of the extruded coating layer is fused to the resin of the second base member, thereby holding the linear transmission member in the second base member.

3. A wiring member according to claim 2, wherein the first base member has higher rigidity than the second base member.

4. A wiring member according to claim 3, wherein at least one of the first wiring body and the second wiring body is provided in two or more layers, and the first wiring body is located in the outermost layer in the stacking direction.

5. A wiring member according to any one of claims 1 to 4, wherein the second wiring body is provided in two or more layers, the two or more layers of the second wiring body including a first layer and a second layer, and the diameter of the linear transmission member of the second layer is larger than the diameter of the linear transmission member of the first layer.

6. A wiring member according to any one of claims 1 to 4, wherein the second wiring body is provided in two or more layers, the two or more layers of the second wiring body are separated into layers according to the conductor cross-sectional area of ​​the linear transmission member, and the layer having the linear transmission member with the largest conductor cross-sectional area among the two or more layers of the second wiring body is located as the outermost layer in the stacking direction.

7. A wiring assembly comprising: a first wiring body including a first linear transmission member and a first base member that holds the first linear transmission member; and a second wiring body including a second linear transmission member and a second base member that holds the second linear transmission member, wherein the first wiring body and the second wiring body are stacked in the thickness direction of the first base member and the thickness direction of the second base member, the first linear transmission member has a first transmission line body and a first covering layer that covers the first transmission line body, the second linear transmission member has a second transmission line body and a second covering layer formed by extruding a resin around the second transmission line body, the first linear transmission member is thinner than the second linear transmission member, and the first linear transmission member is held by the first base member by having at least half the circumference of the first linear transmission member embedded in the first base member, The second linear transmission member is held by the second base member by the resin of the second coating layer being fused to the resin of the second base member.

Images