Wiring member and manufacturing method for wiring member

Abstract

The purpose of the present invention is to provide a technology for preventing a linear transmission member from being peeled off easily from a base member. This wiring member includes a base member and a linear transmission member fixed to the base member via a connection part. One fixing part, which is a fixing part between the base member and the linear transmission member and is continuous along the extension direction of the linear transmission member, has end fixing portions that are portions positioned at both ends along the extension direction, and an intermediate fixing part that is a part positioned between the end fixing portions at both ends. The fixing forces of the end fixing portions are larger than the fixing force of the intermediate fixing part.

Description

Wiring member and method for manufacturing the same

[0001] The present disclosure relates to a wiring member and a method for manufacturing the wiring member.

[0002] Patent Document 1 discloses a wire harness in which electric wires are welded to a functional exterior member formed in a sheet shape.

[0003] Japanese Patent Application Laid-Open No. 2018-137208

[0004] It is desirable that the electric wire is not easily peeled off from the exterior member.

[0005] Therefore, an object of the present invention is to provide a technique for making it difficult for the linear transmission member to peel off from the base member.

[0006] The wiring member of the present disclosure comprises a base member and a linear transmission member fixed to the base member at a contact portion, and in a single fixed portion that is a fixed portion between the base member and the linear transmission member and that is continuous along the extension direction of the linear transmission member, portions located at both ends along the extension direction are end fixed portions, and portions located between the end fixed portions at both ends are intermediate fixed portions, and the fixing force of the end fixed portions is greater than the fixing force of the intermediate fixed portion.

[0007] According to the present disclosure, the linear transmission member can be made less likely to peel off from the base member.

[0008] FIG. 1 is a plan view showing a wiring member according to a first embodiment. FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1. FIG. 4 is an explanatory view showing an example of a method for manufacturing a wiring member according to a first embodiment. FIG. 5 is an explanatory view showing another example of a method for manufacturing a wiring member according to a first embodiment. FIG. 6 is a cross-sectional view showing a wiring member according to a modified example.

[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 base member and a linear transmission member fixed to the base member at a contact portion, wherein the base member and the linear transmission member are fixed to one fixed portion that is continuous along the extension direction of the linear transmission member, and the portions located at both ends along the extension direction are end fixed portions, and the portions located between the end fixed portions at both ends are intermediate fixed portions, and the fixing strength of the end fixed portions is greater than the fixing strength of the intermediate fixed portion.

[0012] In the wiring member (1), when the linear transmission member peels off from the base member, it is usually the end fixing portion located at the end of the fixing portion that is most likely to peel off. Because the fixing strength of the end fixing portion is greater than the fixing strength of the intermediate fixing portion, the linear transmission member is less likely to peel off from the base member.

[0013] (2) In the wiring member of (1), a plurality of the linear transmission members may be arranged in parallel, and the fixing strength of the end fixing portion of each of the plurality of linear transmission members may be greater than the fixing strength of the intermediate fixing portion of each of the plurality of linear transmission members, thereby making each of the plurality of linear transmission members less likely to peel off from the base member.

[0014] (3) In the wiring member of (2), the end fixing portions of the plurality of fixing parts may be adjacent to each other, and the intermediate fixing portions may be adjacent to each other. This allows the fixing strength of the end fixing portions to be greater than the fixing strength of the intermediate fixing portions in each fixing part, while providing the plurality of fixing parts all at once.

[0015] (4) The present disclosure also provides a method for manufacturing a wiring member, comprising: an arrangement step of arranging a linear transmission member on a base member; and a fixing step of fixing the linear transmission member to the base member at contact portions to form a fixed portion, wherein, in one fixed portion that is continuous along the extension direction of the linear transmission member, portions located at both ends along the extension direction are defined as end fixed portions, and portions located between the end fixed portions at both ends are defined as intermediate fixed portions, and the fixing step involves fixing the linear transmission member such that the adhesive strength of the end fixed portions is greater than the adhesive strength of the intermediate fixed portion. When the linear transmission member peels off from the base member, it is usually more likely to peel off from the end fixed portion located at the end of the fixed portion. By having the adhesive strength of the end fixed portion greater than the adhesive strength of the intermediate fixed portion, the linear transmission member is less likely to peel off from the base member.

[0016] (5) In the method for manufacturing a wiring member according to (4), in the fixing step, the clamping force for the portion to become the end fixing portion may be greater than the clamping force for the portion to become the intermediate fixing portion, thereby fixing the end fixing portion so that the fixing force of the end fixing portion is greater than the fixing force of the intermediate fixing portion. This makes it easy to fix the end fixing portion so that the fixing force of the end fixing portion is greater than the fixing force of the intermediate fixing portion.

[0017] [Details of the embodiments of the present disclosure] Specific examples of the wiring member and the manufacturing method 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 equivalent to the claims.

[0018] [Embodiment 1] A wiring member and a method for manufacturing a wiring member according to embodiment 1 will be described below. Fig. 1 is a plan view showing a wiring member 10 according to embodiment 1. Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1. Fig. 3 is a cross-sectional view taken along line III-III in Fig. 1.

[0019] The wiring member 10 includes a base member 20 and a linear transmission member 30. The linear transmission member 30 is fixed onto the base member 20. As a result, the portion of the linear transmission member 30 that is arranged on the base member 20 is held along a predetermined path. Here, a plurality of linear transmission members 30 are arranged in parallel on the base member 20. The paths of the plurality of linear transmission members 30 are held by the base member 20.

[0020] The base member 20 has a main surface. The linear transmission members 30 are disposed and fixed on this main surface. The main surface may be a flat surface, a curved surface, or an uneven surface. The main surface may be a composite surface having a flat surface and another curved surface, etc. The base member 20 may be any member having a main surface for fixing the linear transmission members 30, and may be formed in a sheet shape or a three-dimensional shape. Here, the base member 20 is described as a sheet member formed in a flat shape overall. By fixing multiple linear transmission members 30 to the flat sheet member, the wiring member 10 is maintained in a flat shape.

[0021] The base member 20 has flexibility that allows it to be easily bent in the thickness direction. The wiring member 10 including the base member 20 and the linear transmission member 30 has flexibility that allows it to be easily bent in the thickness direction of the base member 20. The base member 20 may have rigidity that makes it difficult to bend in the thickness direction. The wiring member 10 may be difficult to bend in the thickness direction of the base member 20.

[0022] The material, structure, etc. constituting the base member 20 are not particularly limited and can be set as appropriate. Regarding the material of the base member 20, the base member 20 is formed of a resin material here. Materials other than resin, such as metals or inorganic substances, may also be used as the material of the base member 20.

[0023] The base member 20 may have a single-layer structure or a multi-layer structure of two or more layers. The base member 20 has a fixing layer having a main surface to which the linear transmission member 30 is fixed. When the base member 20 has a multi-layer structure, the base member 20 has, in addition to the fixing layer, an additional layer laminated on the fixing layer. The additional layer may be formed of a different material from the fixing layer or have a different structure. The additional layer may enhance the functionality of the fixing layer or add a function not present in the fixing layer to the base member 20.

[0024] The fixing layer is preferably formed of a material containing a thermoplastic resin such as PVC (polyvinyl chloride), PE (polyethylene), PET (polyethylene terephthalate), PP (polypropylene), etc. The material constituting the additional layer may be a metal, an inorganic substance, or the like in addition to the materials described above for the fixing layer.

[0025] Each layer of the base member 20 may be, for example, a sheet having a uniform solid cross section (also called a non-foamed sheet or solid sheet). Alternatively, for example, each layer may be a foamed sheet. Alternatively, for example, each layer may be a fibrous sheet such as a knitted fabric, woven fabric, or nonwoven fabric. Alternatively, for example, each layer may have a mesh structure. For example, the fixed layer may be a solid sheet, and the additional layer may be a fibrous sheet.

[0026] The fixing layer and the additional layer may both be resin layers. Alternatively, for example, one of the fixing layer and the additional layer may be a resin layer and the other a metal layer. The manner in which the fixing layer and the additional layer are fixed is not particularly limited, but they may be fixed by fusion or adhesion. For example, if at least one of the fixing layer and the additional layer is a sheet with voids on the surface, such as a fiber sheet or a foam sheet, a resin material or adhesive can penetrate into the voids and fix the layer. This produces a so-called anchor effect, firmly fixing the fixing layer and the additional layer.

[0027] The fixing layer and the additional layer may be formed to have the same size (same planar shape). One of the fixing layer and the additional layer may be formed larger than the other. The fixing layer and the additional layer may be fixed over the entire contact area. The fixing layer and the additional layer may be fixed over only a part of the contact area.

[0028] In the example shown in FIG. 1 , the base member 20 has a bending path portion. The linear transmission member 30 is held so as to extend along the bending path portion. It is not essential that the base member 20 has a bending path portion, and the base member 20 may be formed in a straight line. In the example shown in FIG. 1 , the bending path portion is formed in an L-shape in which two straight strip-shaped portions intersect at right angles. The bending path portion may be formed in a shape in which two straight strip-shaped portions intersect at an angle other than orthogonal. The bending path portion may be formed in such a way that the strip-shaped portions are curved or arc-shaped.

[0029] 1, the base member 20 does not have a branch portion. The base member 20 may have a branch portion formed, for example, in a T-shape or a Y-shape. The base member 20 may hold the branch portion of the linear transmission member 30.

[0030] Each of the multiple linear transmission members 30 is a linear member that transmits electricity, light, or the like. It is assumed that the multiple linear transmission members 30 are members that connect components in a vehicle. For example, a connector 50 is provided at the end of the linear transmission member 30. This connector 50 is connected to a connector 50 provided on a counterpart component, thereby connecting the linear transmission member 30 to the counterpart component. In other words, the present wiring member 10 is used as a wiring member 10 that electrically (or optically) connects various components in a vehicle or the like.

[0031] The linear transmission member 30 is assumed to be a linear transmission member 30 that connects components in a vehicle. The linear transmission member 30 extends along a wiring path that corresponds to the position of the component to be connected, etc. The linear transmission member 30 may be a linear member that transmits electricity, light, etc. Each linear transmission member 30 may include a transmission line main body 31 that transmits electricity, light, etc., and a coating layer 32 that covers the transmission line main body 31. The linear transmission member 30 may be composed only of the transmission line main body 31 without including the coating layer 32. For example, the linear transmission member 30 may be a general electric wire having a core wire and a coating surrounding the core wire, or may be a bare conductor, a shielded wire, a twisted wire, an enameled wire, a nichrome wire, an optical fiber, etc.

[0032] The linear transmission member 30 that transmits electricity may be any of various signal lines and power lines. A part of the linear transmission member 30 that transmits electricity may be used as an antenna, a coil, or the like that sends or receives a signal or power to or from space.

[0033] Furthermore, the linear transmission member 30 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).

[0034] The linear transmission member 30 is arranged so as to bend along the curved path portion of the base member 20. The linear transmission member 30 has a curved section and a straight section. The curved section is a section that is arranged so as to bend along the curved path portion. The straight section is a section that extends linearly along the linear band-shaped portion. Straight sections are provided on both sides of the curved section.

[0035] One end of the linear transmission member 30 extends from a first end of the base member 20 and is connected to the connector 50. The other end of the linear transmission member 30 extends from a second end of the base member 20 and is connected to the connector 50. The end of the linear transmission member 30 may be connected to the connector 50 without extending from the base member 20. In this case, the connector 50 may be fixed to the base member 20.

[0036] For example, the connector 50 includes a connector terminal for transmitting electricity or light and a housing for holding the connector terminal. An end of the transmission line body 31 is connected to the connector terminal. For example, if the linear transmission member 30 is an electric wire, the connector terminal is a conductive member and the housing is an insulating member.

[0037] The portion where the base member 20 and the linear transmission member 30 are fixed is the fixed portion 40. Here, multiple fixed portions 40 are provided at intervals along the extension direction of one linear transmission member 30. The linear transmission member 30 is fixed to the base member 20 via the multiple fixed portions 40 and is held at a predetermined path relative to the base member 20. The multiple fixed portions 40 fix at least a linearly extending portion of the linear transmission member 30 to the base member 20. Here, "the linearly extending linear portion of the linear transmission member 30" means that the linear transmission member 30 extends in one direction when the main surface of the base member 20 is observed in a plan view. The fixed portion 40 fixes the portion of the linear transmission member 30 that follows the curved path portion to the base member 20 in a bent state. Portions of the linear transmission member 30 other than the portion fixed by the fixed portion 40 may be fixed to the base member 20 in a bent state.

[0038] The fixing portion 40 is formed by contact portion fixation. Here, contact portion fixation refers to the portion where the linear transmission member 30 and the base member 20 come into contact and are fixed together. Note that a fixing mode other than contact portion fixation is non-contact portion fixation. Non-contact portion fixation refers to, for example, a fixing member such as sewing thread or adhesive tape pressing the linear transmission member 30 toward the base member 20 and maintaining the pressed state. Contact portion fixation refers to a fixing mode excluding these non-contact portion fixations.

[0039] 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 member 30 and the base member 20 being indirectly attached and fixed via an indirect fixing portion such as an adhesive, pressure-sensitive adhesive, or double-sided adhesive tape provided between them. Direct fixing of the contact portions refers to the linear transmission member 30 and the base member 20 being directly attached and fixed without the use of a separate adhesive or the like. In direct fixing of the contact portions, for example, the linear transmission member 30 and the base member 20 may be attached and fixed by melting a resin contained in at least one of them.

[0040] 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.

[0041] In this case, the means for forming the state of direct fixation at the contact sites is not particularly limited, and known means such as welding, fusion, and the like can be used. For example, when forming the state of direct fixation at the contact sites by heat fusion, various fusion means such as ultrasonic fusion, heat and pressure fusion, hot air fusion, and high-frequency fusion can be used. Furthermore, when the state of direct fixation at the contact sites is formed by these means, the linear transmission member 30 and the base member 20 are in a state of direct fixation at the contact sites by that means. Specifically, for example, when the state of direct fixation at the contact sites is formed by ultrasonic fusion, the linear transmission member 30 and the base member 20 are in a state of direct fixation at the contact sites by ultrasonic fusion.

[0042] Here, the description will be made assuming that the fixing portion 40 is a portion that fusion-fixes the linear transmission member 30 to the base member 20. The fixing layer of the base member 20 is a fusion layer. Here, the covering layer 32 of the linear transmission member 30 and the fusion layer of the base member 20 contain the same type of resin material. The resin material of the covering layer 32 of the linear transmission member 30 and the resin material of the fusion layer of the base member 20 are both melted and fused.

[0043] These fused and fixed portions will be described assuming that they are fixed portions formed by ultrasonic fusion. That is, the fixed portions 40 are fused portions formed by ultrasonic fusion of the resin constituting the base member 20 and the resin constituting the coating layer 32 of the linear transmission member 30. Furthermore, each fixed portion 40 can be considered as a spot fixed portion provided at multiple locations spaced apart along the extension direction of one linear transmission member 30.

[0044] 2 , in one fixing portion 40 that is continuous along the extension direction of linear transmission member 30, the portions located at both ends along the extension direction are end fixing portions 41, and the portion located between end fixing portions 41 at both ends is intermediate fixing portion 42. The fixing strength of end fixing portion 41 is greater than the fixing strength of intermediate fixing portion 42. This fixing strength can be evaluated, for example, by the peel strength of each of end fixing portion 41 and intermediate fixing portion 42.

[0045] The peel strength can be evaluated, for example, by conducting the same type of peel test on each of the end fixing portion 41 and the intermediate fixing portion 42. The peel test may be a test conforming to any of the tests specified in JIS K6854, for example. Specifically, the peel test may be, for example, a 180-degree peel test in which the linear transmission member 30 is folded 180 degrees relative to the base member 20 at the end fixing portion 41 or the intermediate fixing portion 42 and pulled, or a T-type peel test in which the base member 20 and the linear transmission member 30 are pulled in opposite perpendicular directions relative to the fused surfaces. By conducting the same type of peel test on the end fixing portion 41 and the intermediate fixing portion 42, the magnitude of the peel strength can be evaluated.

[0046] With regard to end fixing portion 41, because end fixing portion 41 is located at the end of fixing section 40 along the extension direction of linear transmission member 30, the results of a peel test conducted on fixing section 40 can be used to evaluate the fixing strength of end fixing portion 41. With regard to intermediate fixing portion 42, after fixing section 40 is formed, end fixing portion 41 on one end side is removed, so that intermediate fixing portion 42 forms the end of linear transmission member 30, and the results of a peel test conducted on intermediate fixing portion 42 can be used to evaluate the fixing strength of intermediate fixing portion 42. As a sample for the peel test on intermediate fixing portion 42, for example, a sample in which wiring member 10 is cut at the center of fixing section 40 along the extension direction of linear transmission member 30 may be used.

[0047] In each of the multiple fixing portions 40 spaced apart along the extension direction of the linear transmission member 30, the fixing strength of the end fixing portion 41 is greater than the fixing strength of the intermediate fixing portion 42. Furthermore, in each of the multiple fixing portions 40 of the multiple linear transmission members 30, the fixing strength of the end fixing portion 41 is greater than the fixing strength of the intermediate fixing portion 42. In the example shown in FIG. 1 , six linear transmission members 30 are each fixed to the base member 20 by six fixing portions 40. Therefore, in the example shown in FIG. 1 , 36 fixing portions 40 are provided on the wiring member 10. In each of the 36 fixing portions 40, the fixing strength of the end fixing portion 41 is greater than the fixing strength of the intermediate fixing portion 42. However, in some of the multiple fixing portions 40 in the wiring member 10, the fixing strength of the end fixing portion 41 may be the same as or smaller than the fixing strength of the intermediate fixing portion 42.

[0048] The end fixing portions 41 of the fixing portions 40 of the plurality of linear transmission members 30 are adjacent to each other, and the intermediate fixing portions 42 are adjacent to each other. Here, as shown in FIG. 1 , the positions of the fixing portions 40 are adjacent to each other in the plurality of linear transmission members 30. In the adjacent fixing portions 40, the positions of one end of the fixing portion 40 and the positions of the other end of the fixing portion 40 are aligned along the extension direction of the linear transmission member 30. As a result, in the adjacent fixing portions 40, the end fixing portions 41 are adjacent to each other, and the intermediate fixing portions 42 are adjacent to each other. Note that the fixing strengths of the adjacent fixing portions 40 may be the same or different. In the adjacent fixing portions 40, the fixing strength of the end fixing portion 41 of one fixing portion 40 may be smaller than the fixing strength of the intermediate fixing portion 42 of the other fixing portion 40. In one fixing part 40, the fixing strength of the end fixing portion 41 needs to be greater than the fixing strength of the intermediate fixing portion 42.

[0049] The difference between the adhesive strength of the end fixing portion 41 and the adhesive strength of the intermediate fixing portion 42 is not particularly limited and can be set as appropriate. For example, the difference between the adhesive strength of the end fixing portion 41 and the adhesive strength of the intermediate fixing portion 42 may be greater than 0 and less than 100% of the adhesive strength of the intermediate fixing portion 42. In other words, the adhesive strength of the end fixing portion 41 may be greater than the adhesive strength of the intermediate fixing portion 42 and less than twice the adhesive strength of the intermediate fixing portion 42. Furthermore, for example, the difference between the adhesive strength of the end fixing portion 41 and the adhesive strength of the intermediate fixing portion 42 may be more than 100% of the adhesive strength of the intermediate fixing portion 42. In other words, the adhesive strength of the end fixing portion 41 may be more than twice the adhesive strength of the intermediate fixing portion 42.

[0050] In one fixed portion 40, the fixing strength may be configured to gradually decrease from the end fixed portion 41 toward the center of the intermediate fixed portion 42. In other words, when the fixing strength of the fixed portion 40 is plotted on a graph with the vertical axis representing the fixing strength and the horizontal axis representing the extension direction of the linear transmission member 30, the graph may form a straight line from the end of the fixed portion 40 toward the center. In one end fixed portion 41, the fixing strength of the end on the intermediate fixed portion 42 side may be smaller than the fixing strength of the end on the opposite side from the intermediate fixed portion 42. Similarly, in the intermediate fixed portion 42, the fixing strength of the end along the extension direction may be smaller than the fixing strength at the center along the extension direction.

[0051] In one fixing portion 40, the fixing force of the end fixing portion 41 may be approximately constant along the extension direction of the linear transmission member 30, and the fixing force of the intermediate fixing portion 42 may be approximately constant along the extension direction of the linear transmission member 30. In other words, when graphed with the fixing force of the fixing portion 40 on the vertical axis and the extension direction of the linear transmission member 30 on the horizontal axis, the graph may be in the form of a step function.

[0052] Of the dimensions of the fixed portion 40, the dimension along the extension direction of the linear transmission member 30 is referred to as the length dimension of the fixed portion 40, and the dimension along the width direction of the linear transmission member 30 is referred to as the width dimension of the fixed portion 40. Similarly, the dimension of the end fixed portion 41 along the extension direction of the linear transmission member 30 is referred to as the length dimension of the end fixed portion 41. Furthermore, the dimension of the intermediate fixed portion 42 along the extension direction of the linear transmission member 30 is referred to as the length dimension of the intermediate fixed portion 42.

[0053] The width dimension of the fixed portion 40 is equal to or smaller than the diameter of the linear transmission member 30. Here, the portion of the linear transmission member 30 that is lower than the center in the height direction is fixed to the base member 20. Therefore, here, the width dimension of the fixed portion 40 is smaller than the diameter of the linear transmission member 30.

[0054] The length of the fixed portion 40 is not particularly limited and can be set as appropriate. The length of the fixed portion 40 may be longer than the width of the fixed portion 40. The length of the fixed portion 40 may be longer than the diameter of the linear transmission member 30. For example, the size of an automotive electric wire having a conductor cross-sectional area of ​​approximately 0.5 square meters is 0.5 sq m, and the diameter of this 0.5 sq m automotive electric wire is approximately 2.2 millimeters. The length of the fixed portion 40 may be longer than 2.2 millimeters. The length of the fixed portion 40 may be, for example, 5 millimeters to 15 millimeters.

[0055] The length dimensions of the end fixing portions 41 and the intermediate fixing portions 42 are not particularly limited and can be set as appropriate. For example, the length dimension of one end fixing portion 41 may be the same as or shorter than the length dimension of one intermediate fixing portion 42. Furthermore, for example, the sum of the lengths of two end fixing portions 41 may be the same as or shorter than the length dimension of one intermediate fixing portion 42. Furthermore, for example, one fixing portion 40 may be divided into thirds to sixths equal parts along the extension direction of the linear transmission member 30, and the two end portions may be defined as end fixing portions 41, and the intermediate portion may be defined as the intermediate fixing portion 42. Furthermore, for example, the length dimension of one end fixing portion 41 may be one-tenth to one-third of the length dimension of the fixing portion 40. The length dimension of one intermediate fixing portion 42 may be one-third to four-fifths of the length dimension of the fixing portion 40. For example, the length dimension of the fixing portion 40 may be 10 millimeters, the length dimension of one end fixing portion 41 may be 2 millimeters, and the length dimension of the intermediate fixing portion 42 may be 6 millimeters.

[0056] The difference in fastening strength between the end fixing portion 41 and the intermediate fixing portion 42 may be obtained by any configuration or any method. Here, there is no difference in the materials to be fastened between the end fixing portion 41 and the intermediate fixing portion 42. In other words, the materials of the end fixing portion 41 and the intermediate fixing portion 42 may have the same fastening strength when fastened under the same fastening conditions.

[0057] In each of the linear transmission member 30 and the base member 20, the portion that becomes the end fixing portion 41 and the portion that becomes the intermediate fixing portion 42 are of the same type. The "same type" of portions means that they have the same thickness, layer structure, etc.

[0058] If there is no difference in the materials to be fixed between the end fixing portion 41 and the intermediate fixing portion 42, the difference in the fixing strength can be achieved, for example, by applying more energy to the end fixing portion 41 than to the intermediate fixing portion 42 when forming the fixing portion 40. Such a difference in applied energy can be achieved by changing the conditions on the fixing device side. When the fixing portion 40 is formed by ultrasonic welding, such conditions may be, for example, the applied pressure, the applied pressure time, or the vibration conditions.

[0059] <Manufacturing Method> Fig. 4 is an explanatory view showing an example of a method for manufacturing the wiring member 10 according to the first embodiment. Fig. 5 is an explanatory view showing another example of a method for manufacturing the wiring member 10 according to the first embodiment.

[0060] The manufacturing method of the wiring member 10 includes an arrangement process and a fixing process. The arrangement process is a process of arranging the linear transmission member 30 on the base member 20. The fixing process is a process of fixing the linear transmission member 30 to the base member 20 at a contact portion to form a fixing portion 40.

[0061] In the fixing process, the fixing force of end fixing portion 41 is made greater than the fixing force of intermediate fixing portion 42. Here, in the fixing process, the force clamping the portion that will become end fixing portion 41 is made greater than the force clamping the portion that will become intermediate fixing portion 42, thereby fixing end fixing portion 41 so that the fixing force is greater than the fixing force of intermediate fixing portion 42. In other words, by changing the pressure applied to end fixing portion 41 and intermediate fixing portion 42, a difference in fixing force is obtained.

[0062] 4, when forming the fixing portion 40, the linear transmission member 30 and base member 20, which will be the fixing materials, are sandwiched in the stacking direction by the first member 81 and the second member 82. At this time, the pressure applied by the first member 81 and the second member 82 to the portion that will become the end fixing portion 41 is greater than the pressure applied to the portion that will become the intermediate fixing portion 42.

[0063] Here, the fixing portion 40 is an ultrasonic fusion portion. In this case, the first member 81 and the second member 82 are constituted by a horn 81 and anvil 82 in an ultrasonic fusion machine. The ultrasonic fusion machine applies ultrasonic vibrations while applying pressure. The horn 81 is a member that applies ultrasonic vibrations. The anvil 82 supports the member from the opposite side to the horn 81. The portion that becomes the fixing portion 40 is pressurized by the horn 81 and the anvil 82. For example, the horn 81 contacts the outer surface of the base member 20 opposite to the linear transmission member 30 side and applies ultrasonic vibrations. The anvil 82 supports the linear transmission member 30.

[0064] The method for varying the pressure is not particularly limited and can be set as appropriate. In the example shown in FIG. 4 , a concave-convex shape is provided on the contact surface 81A of the horn 81 that contacts the fusion material (here, the base member 20). Convex portions 81B are provided on both ends of the contact surface 81A along the extension direction of the linear transmission member 30, and concave portions 81C are provided between the convex portions 81B. This makes the pressure applied to the portions with the convex portions 81B greater than the pressure applied to the portions with the concave portions 81C. However, the pressure may be varied by providing the concave-convex shape on the anvil 82 instead of the horn 81. Furthermore, the pressure may be varied by providing the concave-convex shape on both the horn 81 and the anvil 82.

[0065] In the example shown in FIG. 4 , one set of horn 81 and anvil 82 is used to form end-fixed portion 41 and intermediate fixed portion 42 at the same time. In this case, the conditions other than the pressure applied to end-fixed portion 41 and intermediate fixed portion 42 in the ultrasonic fusion machine (such as the vibration intensity of horn 81, the vibration application time, and the pressure application time by horn 81 and anvil 82) are the same. In the ultrasonic fusion machine, the conditions other than the pressure applied to end-fixed portion 41 and intermediate fixed portion 42 may be different. If end-fixed portion 41 and intermediate fixed portion 42 are formed sequentially rather than at the same time, the conditions other than the pressure applied can be different when forming end-fixed portion 41 and intermediate fixed portion 42. For example, any one of the vibration intensity of horn 81, the vibration application time, and the pressure application time by horn 81 and anvil 82 may be different when forming end-fixed portion 41 and intermediate fixed portion 42.

[0066] Adjacent fixing portions 40 of a plurality of linear transmission members 30 may be formed at one time using one set of horn 81 and anvil 82. Adjacent fixing portions 40 of a plurality of linear transmission members 30 may be formed in order using one set of horn 81 and anvil 82, or may be formed at one time using separate sets of horn 81 and anvil 82.

[0067] The applied pressure may vary depending on configurations other than the uneven shape of the horn 81 or the anvil 82. For example, the applied pressure may vary if the anvil 82 is made of an elastic material such as rubber or elastomer. In this case, the contact surface 81A of the horn 81 and the support surface 82A of the anvil 82 may be horizontal or may have an uneven shape. If the anvil 82 is made of an elastic material, the anvil 82 will bend when pressure is applied, allowing the applied pressure at the end to be greater than the applied pressure at the middle.

[0068] Specifically, in the example shown in FIG. 5 , the anvil 82 is formed of an elastic material. Portions (not shown) of the linear transmission member 30 and the base member 20 on both sides of the portions that are clamped between the horn 81 and the anvil 82 along the extension direction are supported at fixed positions. In this state, the support surface 82A of the anvil 82, pressed by the horn 81 via a fixing material, contracts in the pressing direction (downward in the plane of FIG. 5 ). As a result, the portions of the linear transmission member 30 and the base member 20 that are clamped between the horn 81 and the anvil 82 bend toward the anvil 82. As a result, portions on both sides of the portion of the base member 20 that contacts the contact surface 81A of the horn 81 extend upward in the plane of FIG. 5 . As a result, both ends of the horn 81 bite into the base member 20 along the extension direction of the linear transmission member 30, and the pressure at these ends becomes greater than the pressure in the middle.

[0069] <Effects, etc.> According to the wiring member 10 and its manufacturing method configured as described above, when the linear transmission member 30 fixed to the base member 20 at a contact portion thereof peels off from the base member 20, the peeling usually occurs most easily from the end fixing portion 41 located at the end of the fixing part 40. Because the fixing strength of the end fixing portion 41 is greater than the fixing strength of the intermediate fixing portion 42, the end portion that is prone to peeling can be fixed more firmly, making the linear transmission member 30 less likely to peel off from the base member 20.

[0070] Furthermore, in the fixing portion 40 of each of the plurality of linear transmission members 30, the fixing strength of the end fixing portion 41 is greater than the fixing strength of the intermediate fixing portion 42. This makes it difficult for each of the plurality of linear transmission members 30 to peel off from the base member 20.

[0071] Furthermore, the end fixing portions 41 of the multiple fixing parts 40 are adjacent to each other, and the intermediate fixing portions 42 are adjacent to each other. This allows multiple fixing parts 40 to be provided all at once, and the fixing strength of the end fixing portion 41 in each fixing part 40 can be made greater than the fixing strength of the intermediate fixing portion 42.

[0072] Furthermore, according to the manufacturing method of wiring member 10, in the fixing step, the force that clamps the portion that will become end fixing portion 41 is made greater than the force that clamps the portion that will become intermediate fixing portion 42, thereby fixing end fixing portion 41 so that its fixing force is greater than that of intermediate fixing portion 42. This makes it easy to fix end fixing portion 41 so that its fixing force is greater than that of intermediate fixing portion 42.

[0073] [Note] FIG. 6 is a cross-sectional view showing a wiring member 110 according to a modified example.

[0074] The wiring member 110 differs from the above-described wiring member 10 in that a recess 22 is formed on the outer surface of the base member 120. The recess 22 is formed on the outer surface of the portion of the base member 120 where the fixing portion 40 is formed. In the base member 120, the outer surface on which the recess 22 is formed is the surface opposite to the main surface on the linear transmission member 30 side. The recess 22 is, for example, a mark caused by pressing by the first member 81. When the fixing portion 40 is a fusion portion, the recess 22 is a fusion mark. Furthermore, when the fixing device is an ultrasonic fusion machine, the recess 22 is a horn mark.

[0075] The portions of the recess 22 located at both ends along the extension direction of the linear transmission member 30 are defined as end portions 23, and the portion located in the middle is defined as an intermediate portion 24. As shown in Fig. 6, the amount of recession of the end portions 23 may be larger than the amount of recession of the intermediate portion 24. For example, as the pressure applied by the first member 81 and the second member 82 increases, the amount of recession of the recess 22 increases.

[0076] The configurations described in the above embodiments and modifications can be combined as appropriate as long as they are not mutually contradictory.

[0077] 10, 110 Wiring member 20, 120 Base member 22 Recess 23 End portion 24 Intermediate portion 30 Linear transmission member 31 Transmission line body 32 Covering layer 40 Fixing portion 41 End fixing portion 42 Intermediate fixing portion 50 Connector 81 First member (horn) 81A Contact surface 81B Convex portion 81C Recess 82 Second member (anvil) 82A Support surface

Claims

1. A wiring member comprising a base member and a linear transmission member fixed to a contact portion of the base member, wherein in one fixing portion that is a fixing portion between the base member and the linear transmission member and is continuous along the extending direction of the linear transmission member, portions located at both ends along the extending direction are end fixing portions, a portion located between the end fixing portions at both ends is an intermediate fixing portion, and the fixing force of the end fixing portion is greater than the fixing force of the intermediate fixing portion.

2. The wiring member according to claim 1, wherein a plurality of the linear transmission members are arranged in parallel, and in the fixing portion of each of the plurality of linear transmission members, the fixing force of the end fixing portion is greater than the fixing force of the intermediate fixing portion.

3. The wiring member according to claim 2, wherein the end fixing portions in the plurality of fixing portions are adjacent to each other and the intermediate fixing portions are adjacent to each other.

4. A manufacturing method of a wiring member, comprising an arranging step of arranging a linear transmission member on a base member, and a fixing step of fixing the linear transmission member to a contact portion of the base member to form a fixing portion, wherein in one fixing portion that is continuous along the extending direction of the linear transmission member, portions located at both ends along the extending direction are end fixing portions, a portion located between the end fixing portions at both ends is an intermediate fixing portion, and in the fixing step, the linear transmission member is fixed such that the fixing force of the end fixing portion is greater than the fixing force of the intermediate fixing portion.

5. The manufacturing method of a wiring member according to claim 4, wherein in the fixing step, the fixing force of the end fixing portion is made greater than the fixing force of the intermediate fixing portion by making the force for sandwiching the portion that becomes the end fixing portion greater than the force for sandwiching the portion that becomes the intermediate fixing portion.

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