Coaxial cable and method for manufacturing coaxial cable

Abstract

A coaxial cable (100a) is provided with a first conductor part (1) and a second conductor part (2). The first conductor part (1) has an internal space (V). The first conductor part (1) extends along a central axis (A). The first conductor portion (1) includes a first conductor portion (11) and a first insulating portion (12). The first insulating portion (12) covers a surface (11s) of the first conductor portion (11). A first through-hole (H1) is formed in a side surface (20s) surrounding the central axis (A) in the second conductor part (2). The first conductor part (1) is inserted into the internal space (V) through the first through hole (H1).

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a coaxial cable and a manufacturing method of a coaxial cable. BACKGROUND

[0002] Conventionally, a coaxial cable in which an outer conductor is arranged on the outer periphery of an inner conductor is known (for example, refer to Japanese Patent Application Publication No. 03-214513).

[0003] Patent Document 1: Refer to Japanese Patent Application Publication No. 03-214513

[0004] However, the above-described coaxial cable is manufactured by, for example, forming a coaxial line by sequentially arranging an insulating layer, a shielding layer, and an outer covering layer on the outer periphery of a center conductor, and then performing a pressurization process and the like as necessary, which involves many manufacturing processes. Therefore, there is room for improvement in the manufacturing of the coaxial cable, SUMMARY

[0005] The present disclosure was completed in order to solve the above-described problems, and an object of the present disclosure is to provide a coaxial cable that is easy to manufacture.

[0006] The coaxial cable according to the present disclosure includes a first conductor portion and a second conductor portion. The first conductor portion has an inner space. The first conductor portion extends along a center axis. The first conductor portion includes a first conductor section and a first insulating section. The first insulating section covers a surface of the first conductor section. A first through-hole is formed in the second conductor portion on a side surface that surrounds the center axis. The first conductor portion is inserted into the inner space via the first through-hole.

[0007] The manufacturing method of a coaxial cable according to the present disclosure includes a process of preparing a first conductor section and a second conductor section; a process of covering the first conductor section with a first insulating section; a process of forming a first through-hole and a second through-hole in the second conductor section; a process of passing the first conductor section from the first through-hole to the second through-hole through an inner space; and a process of covering the second conductor section with a second insulating section.

[0008] According to the above, a coaxial cable that is easy to manufacture can be obtained. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 is a simple perspective view of a coaxial cable according to Embodiment 1.

[0010] Figure 2 is a simple plan view of the coaxial cable according to Embodiment 1.

[0011] Figure 3 is a simple sectional view of the coaxial cable at line segment III-III of Figure 2 is a simple sectional view of the coaxial cable at line segment III-III of

[0012] Figure 4 is a cross-sectional view of the coaxial cable at the line segment IV−IV. Figure 2

[0013] Figure 5 is a cross-sectional view of the coaxial cable at the line segment V−V. Figure 2

[0014] Figure 6 is a flowchart of the manufacturing method of the coaxial cable according to Embodiment 1.

[0015] Figure 7 is a schematic plan view showing one step in the manufacturing method of the coaxial cable according to Embodiment 1.

[0016] Figure 8 is a schematic plan view showing the next step to the step shown in Figure 7

[0017] Figure 9 is a schematic plan view showing the next step to the step shown in Figure 8

[0018] Figure 10 is a schematic plan view showing the next step to the step shown in Figure 9

[0019] Figure 11 is a schematic plan view showing the next step to the step shown in Figure 10

[0020] Figure 12 is a schematic plan view showing the next step to the step shown in Figure 11

[0021] Figure 13 is a schematic plan view showing the next step to the step shown in Figure 12

[0022] Figure 14 is a schematic perspective view of the coaxial cable according to Embodiment 2.

[0023] Figure 15 is a schematic cross-sectional view of the coaxial cable according to Embodiment 2. DETAILED DESCRIPTION

[0024] ​​​​​​​​The embodiments of this disclosure will now be described. Furthermore, unless otherwise specified, identical or corresponding parts will be labeled with the same reference numerals in the following drawings, and their descriptions will not be repeated.

[0025] Implementation method 1.

[0026] <Structure of coaxial cable>

[0027] Figure 1 This is a simplified perspective view of the coaxial cable 100a according to Embodiment 1. Figure 2 This is a simplified top view of the coaxial cable 100a according to Embodiment 1. Figure 3 yes Figure 2 A simplified cross-sectional view of the coaxial cable 100a at line segment III−III. Figure 4 yes Figure 2 A simplified cross-sectional view of the coaxial cable 100a at line segment IV-IV. Figure 5 yes Figure 2 A simplified cross-sectional view of the coaxial cable 100a at line segment V−V.

[0028] Figures 1 to 5 The coaxial cable 100a shown is, for example, a coaxial cable 100a that carries a high-frequency current of 10kHz or higher, and mainly includes a first conductor part 1, a second conductor part 2, and a terminal 3.

[0029] like Figures 3 to 5 As shown, the first conductor portion 1 has a first conductor portion 11 and a first insulating portion 12. The first insulating portion 12 covers the surface 11s of the first conductor portion 11. The second conductor portion 2 has a second conductor portion 21 and a second insulating portion 22. The second insulating portion 22 covers the surface 21s1 of the second conductor portion 21.

[0030] like Figure 2 As shown, the first conductor portion 1 and the second conductor portion 2 extend along the central axis A. The first conductor portion 1 and the second conductor portion 2 are flat in shape. In a top view, it is preferable that the first conductor portion 1 and the second conductor portion 2 are arranged to overlap each other. From different viewpoints, it is preferable that the first conductor portion 1 and the second conductor portion 2 are flat in shape, such as... Figure 4 and Figure 5 As shown, the first conductor portion 1 and the second conductor portion 2 face each other. This increases the area of ​​the surfaces of the first conductor portion 11 and the second conductor portion 21 facing each other, reducing current deviation. As a result, heat generation in the coaxial cable 100a can be suppressed.

[0031] The first conductor portion 11 and the second conductor portion 21 are each, for example, a cylindrical conductor open at both ends. That is, the first conductor portion 11 and the second conductor portion 21 are each conductive. The first conductor portion 11 and the second conductor portion 21 can also be a shape with elasticity. Specifically, the first conductor portion 11 and the second conductor portion 21 can also be an assembly of conductive fibers. For example, the first conductor portion 11 and the second conductor portion 21 can be a structure formed by twisting the fibers together, or a structure formed by weaving.

[0032] As will be described later, in order to suppress the heat generation of the coaxial cable 100a, it is preferable that the first conductor portion 1 and the second conductor portion 2 are flat. Therefore, the shapes of the first conductor portion 11 and the second conductor portion 21 can also be foil, strip, plain weave fabric, or plain knit.

[0033] The materials constituting the first conductor portion 11 and the second conductor portion 21 can also be braided. By using the same material for the first conductor portion 11 and the second conductor portion 21, the number of components can be reduced, and costs can be lowered.

[0034] The first conductor portion 11 and the second conductor portion 21 may, for example, include any one of copper wire, copper alloy wire, aluminum wire, carbon fiber wire, copper-plated polyester fiber wire, semiconductor fiber wire, and composite fiber wire. Examples of semiconductor fiber wires include carbon nanotube fibers and silicon fibers. Composite fiber wires are formed by interlacing at least one type of metal fiber and semiconductor fiber with at least one type of fiber selected from glass fiber, resin fiber, carbon fiber, basalt fiber, ceramic fiber, and alumina fiber.

[0035] like Figure 4 As shown, the first insulating portion 12 covers the first conductor portion 11 to insulate the first conductor portion 11 relative to the second conductor portion 21. The second insulating portion 22 covers the second conductor portion 21 to insulate the second conductor portion 21 relative to its surroundings.

[0036] For example, rubber tubing, heat shrink tubing, or braided tubing can be used as the first insulating part 12 and the second insulating part 22. The material constituting the heat shrink tubing includes at least one of polyolefin, silicone, and fluoropolymer.

[0037] Rubber tubing and heat shrink tubing are flexible. Therefore, when used as a coating material for conductors, the coating material adheres tightly to the conductor, thus preventing the coating material from detaching from the conductor. Furthermore, rubber tubing and heat shrink tubing provide a good appearance when used as coating materials.

[0038] The braided tubing is made of fibers, for example. The materials constituting the braided tubing can include, for example, any one of nylon, silk thread, or glass fiber. When the braided tubing is used as the covering material for the conductor, the braided tubing is shaped along the shape of the first conductor portion 11 and the second conductor portion 21. That is, when the shapes of the first conductor portion 11 and the second conductor portion 21 are flat, the shapes of the first conductor portion 1 (composed of the first conductor portion 11 and the first insulating portion 12) and the second conductor portion 2 (composed of the second conductor portion 21 and the second insulating portion 22) are each flat.

[0039] Terminals 3 are connected to the ends of the first conductor portion 1 and the second conductor portion 2. Specifically, as shown in the figure... Figures 1 to 3 As shown, a terminal 31a is connected to one end of the first conductor portion 1. A terminal 31b is connected to the other end of the first conductor portion 1 opposite to the end where terminal 31a is connected. A terminal 32a is connected to one end of the second conductor portion 2. A terminal 32b is connected to the other end of the second conductor portion 2 opposite to the end where terminal 32a is connected. The positions where terminals 31b and 32b are located are opposite to the positions where terminals 31a and 32a are located.

[0040] Terminal 3 can be connected, for example, by crimping to the ends of the first conductor portion 1 and the second conductor portion 2. Terminal 3, thus connected to the ends of the first conductor portion 1 and the second conductor portion 2, is then connected to an external device (not shown). Figures 1 to 3 As shown, a terminal hole h can also be formed in terminal 3.

[0041] like Figure 2 As shown, when viewed from above, the shape of terminal 3 is preferably rectangular. This increases the area of ​​overlap between, for example, terminal 31a connected to one end of the first conductor portion 1 and terminal 32a connected to one end of the second conductor portion 2 when viewed from above. As a result, deviations in the current flowing within terminal 3 can be suppressed.

[0042] Terminal 31a, which is connected to one end of the first conductor portion 1, can be connected to the + terminal of an external device, for example. On the other hand, terminal 32a, which is connected to one end of the second conductor portion 2, can be connected to the - terminal of an external device, for example. In this way, the direction of the current flowing through the first conductor portion 11 is opposite to the direction of the current flowing through the second conductor portion 21.

[0043] Here, as Figure 1 and Figure 3 As shown, the coaxial cable 100a according to this embodiment 1 is characterized in that a portion 1c of the first conductor portion 1 is inserted into the internal space V of the second conductor portion 2. Specifically, as Figure 3As shown, a first through hole H1 and a second through hole H2 are formed on the side surface 20s of the second conductor portion 2. The second conductor portion 2 has an internal space V. Figure 4 As shown, the internal space V is the region surrounded by the inner circumferential surface 21s2 of the second conductor portion 21.

[0044] The first through hole H1 and the second through hole H2 communicate with the interior space V from the outside of the second conductor portion 2. On the central shaft A, the first through hole H1 is disposed on one end side where terminals 31a and 32a are disposed. On the central shaft A, the second through hole H2 is disposed on the other end side where terminals 31b and 32b are disposed.

[0045] The first conductor portion 1 is inserted into the internal space V via the first through hole H1 and the second through hole H2. Specifically, the first conductor portion 1 has one end 1l and another end 1r. In the first conductor portion 1, one end 1l extends from the first through hole H1 outside the second conductor portion 2. In the first conductor portion 1, the other end 1r extends from the first conductor portion 1 to the outside of the second conductor portion 2 via the second through hole H2. The other end 1r is located on the opposite side of one end 1l. A portion 1c of the first conductor portion 1, positioned between one end 1l and the other end 1r, is disposed within the internal space V. Furthermore, in Figure 1 In the image, a portion 1c of the first conductor section 1 disposed within the internal space V is shown by dashed lines.

[0046] like Figure 4 As shown, in a portion 1c of the first conductor section 1 disposed within the internal space V, the first conductor section 11 is surrounded by the second conductor section 21. At this time, the direction of the magnetic flux b2 generated by the current flowing through the second conductor section 21 is around the central axis A. Furthermore, the direction of the magnetic flux b1 generated by the current flowing through the first conductor section 11 is also around the central axis A. That is, the center position of the magnetic flux b2 generated by the current flowing through the second conductor section 21 coincides with the center position of the magnetic flux b1 generated by the current flowing through the first conductor section 11. The direction of the current flowing through the first conductor section 11 and the direction of the current flowing through the second conductor section 21 are opposite to each other. Therefore, the magnetic flux b1 generated by the current flowing through the first conductor section 11 and the magnetic flux b2 generated by the current flowing through the second conductor section 21 are generated outside the coaxial cable 100a in mutually canceling directions. As a result, the release of electromagnetic noise to the outside of the coaxial cable 100a can be suppressed. In this embodiment 1, the coaxial cable 100a, which achieves the above-mentioned effects, is easily manufactured by forming a through hole in the second conductor portion 2.

[0047] exist Figure 1 One end 1l side and the other end 1r side, such as Figure 5As shown, the first conductor portion 1 and the second conductor portion 2 can be arranged separately from each other. Due to the proximity effect, the current flows in a way that is biased towards the surfaces of the first conductor portion 11 and the second conductor portion 21 facing each other. When viewed from above, if the first conductor portion 1 and the second conductor portion 2 are flat in shape, the deviation of the current can be suppressed. That is, when viewed from above, the greater the width of the first conductor portion 1 and the second conductor portion 2, the greater the area of ​​the surfaces of the first conductor portion 11 and the second conductor portion 21 facing each other, which can suppress the heating of the coaxial cable 100a.

[0048] exist Figure 4 and Figure 5 In the example, the nominal cross-sectional area of ​​the first conductor portion 11 and the second conductor portion 21 is 20 mm². 2 The nominal cross-sectional area of ​​the first conductor portion 11 and the second conductor portion 21 can also be, for example, 10 mm². 2 Preferably, the nominal cross-sectional areas of the first conductor portion 11 and the second conductor portion 21 are the same. Furthermore, the larger the nominal cross-sectional area of ​​the first conductor portion 11 and the second conductor portion 21, the lower the resistance value. This results in suppressing heat generation in the coaxial cable 100a.

[0049] <Manufacturing Method of Coaxial Cable>

[0050] Figure 6 This is a flowchart illustrating the manufacturing method of the coaxial cable 100a according to Embodiment 1. The manufacturing method of the coaxial cable 100a will be described below. Figure 7 As shown, in the manufacturing method of coaxial cable 100a, a step (S1) is performed to prepare the first conductor portion 11 and the second conductor portion 21. In this step (S1), the first conductor portion 11, the second conductor portion 21, and other components required in the steps described later are prepared.

[0051] Next, the process of covering the first conductor portion 11 with the first insulating portion 12 is carried out (S2). In this process (S2), as follows: Figure 8 As shown, the surface 11s of the first conductor portion 11 is covered by the first insulating portion 12. Furthermore, Figure 8 The part indicated by the dashed line corresponds to the first conductor portion 11. The first conductor portion 1 is manufactured in this way.

[0052] Next, step (S3) is performed to form the first through hole H1 and the second through hole H2 in the second conductor portion 21. In this step (S3), firstly, as Figure 9As shown, one end and the other end of the second conductor portion 21 are pressed along the central axis A. This causes the second conductor portion 21 to contract in the direction of the central axis A. As a result, the second conductor portion 21 expands in the short side direction. The material constituting the first conductor portion 11 and the second conductor portion 21 is, for example, a braided material, so the above-described process can be performed by hand.

[0053] Next, as Figure 10 As shown, a first through hole H1 and a second through hole H2 are formed on the surface 21s1 of the second conductor portion 21. The first through hole H1 and the second through hole H2 are formed by enlarging the mesh of the second conductor portion 21 to connect the outside of the second conductor portion 21 with the internal space V.

[0054] Next, step (S4) is performed to allow the first conductor portion 11 to pass from the first through hole H1 through the internal space V to the second through hole H2. In this step (S4), as... Figure 11 As shown, the first conductor portion 1 passes through the internal space V from the first through hole H1 to the second through hole H2. Furthermore, Figure 11 The portion shown by the dashed line corresponds to a part 1c of the first conductor portion 1 disposed within the internal space V. Next, one end and the other end of the second conductor portion 21, which has been expanded in the short-side direction, are stretched along the central axis A. Thus, as Figure 12 As shown, the first conductor portion 1 and the second conductor portion 21 are brought into close contact.

[0055] Next, the process of covering the second conductor portion 21 with the second insulating portion 22 is carried out (S5). In this process (S5), as... Figure 13 As shown, the surface 21s1 of the second conductor portion 21 is covered by the second insulating portion 22.

[0056] Next, a step (S6) is performed to connect terminals 3 to both ends of the first conductor portion 11 and the second conductor portion 21. In this step (S6), terminals 3 are connected to one end of the first conductor portion 1 and the other end of the second conductor portion 2 by crimping. Terminals 3 are connected to the first conductor portion 1 and the second conductor portion 2 by crimping. This completes the manufacturing process. Figures 1 to 5 The coaxial cable shown is 100a.

[0057] Conventionally, large-scale equipment such as extruders are used to manufacture coaxial cables, but according to the manufacturing method described above, coaxial cables 100a that suppress heat generation can be manufactured manually. As a result, the easily manufactured coaxial cable 100a according to Embodiment 1 can be obtained.

[0058] <Effects>

[0059] The coaxial cable 100a disclosed herein includes a first conductor portion 1 and a second conductor portion 2. The first conductor portion 1 has an internal space V. The first conductor portion 1 extends along a central axis A. The first conductor portion 1 includes a first conductor portion 11 and a first insulating portion 12. The first insulating portion 12 covers the surface 11s of the first conductor portion 11. A first through hole H1 is formed in the second conductor portion 2 on a side 20s surrounding the central axis A. The first conductor portion 1 is inserted into the internal space V through the first through hole H1.

[0060] In this way, a portion 1c of the first conductor 1 is inserted into the internal space V of the second conductor 2, thereby suppressing the release of electromagnetic noise to the outside of the coaxial cable 100a. In addition, the coaxial cable 100a can be easily manufactured by hand without the use of large equipment.

[0061] In the coaxial cable 100a described above, a second through hole H2 is formed on the side surface 20s of the second conductor portion 2. The first conductor portion 1 has one end 1l and another end 1r. One end 1l is located outside the second conductor portion 2 from the first through hole H1. The other end 1r is located on the opposite side of one end 1l. The other end 1r extends to the outside of the second conductor portion 2 via the second through hole H2.

[0062] In this way, a portion 1c of the first conductor 1 is inserted into the internal space V of the second conductor 2, thereby suppressing the release of electromagnetic noise to the outside of the coaxial cable 100a. In addition, the coaxial cable 100a can be easily manufactured by hand without the use of large equipment.

[0063] In the coaxial cable 100a described above, the second conductor portion 2 includes a second conductor portion 21 and a second insulating portion 22. The second insulating portion 22 covers the second conductor portion 21. Thus, the second conductor portion 21 is insulated from its surroundings.

[0064] In the coaxial cable 100a described above, the material constituting the second conductor portion 21 is braided. This allows the coaxial cable 100a to be easily manufactured by hand without the use of large equipment.

[0065] In the coaxial cable 100a described above, the material constituting the first conductor portion 11 is braided. This reduces the number of components. As a result, the cost of manufacturing the coaxial cable 100a can be reduced.

[0066] In the coaxial cable 100a described above, the first conductor portion 1 and the second conductor portion 2 are flat in shape. This helps to suppress the heating of the coaxial cable 100a caused by the proximity effect.

[0067] The manufacturing method of the coaxial cable 100a according to the present disclosure includes: a step (S1) of preparing a first conductor portion 11 and a second conductor portion 21 having an internal space V; a step (S2) of covering the first conductor portion 11 with a first insulating portion 12; a step (S3) of forming a first through hole H1 and a second through hole H2 in the second conductor portion 21; a step (S4) of allowing the first conductor portion 11 to pass from the first through hole H1 through the internal space V to the second through hole H2; and a step (S5) of covering the second conductor portion 21 with a second insulating portion 22.

[0068] In this way, a portion 1c of the first conductor 1 is inserted into the internal space V of the second conductor 2, thereby suppressing the release of electromagnetic noise to the outside of the coaxial cable 100a. In addition, the coaxial cable 100a can be easily manufactured by hand without the use of large equipment.

[0069] The manufacturing method of the coaxial cable 100a described above includes a step (S6) of connecting the terminal 3 to both ends of the first conductor portion 11 and the second conductor portion 21.

[0070] In this way, a portion 1c of the first conductor 1 is inserted into the internal space V of the second conductor 2, thereby suppressing the release of electromagnetic noise to the outside of the coaxial cable 100a. In addition, the coaxial cable 100a can be easily manufactured by hand without the use of large equipment.

[0071] Implementation method 2.

[0072] <Structure of coaxial cable>

[0073] Figure 14 This is a simplified perspective view of the coaxial cable 100b involved in Embodiment 2. Figure 14 Corresponding to Figure 1 . Figure 15 This is a simplified cross-sectional view of the coaxial cable 100b involved in Embodiment 2. Figure 15 Corresponding to Figure 3 . Figure 14 and Figure 15 The coaxial cable 100b shown basically has the same characteristics as... Figures 1 to 5 The coaxial cable 100a shown has the same structure and achieves the same effect, but differs in the point where two terminals 32b are connected to the other end of the second conductor portion 2. In the coaxial cable 100b of this embodiment 2, the second through hole H2 is not formed on the side 20s of the second conductor portion 2.

[0074] As described above, the second conductor portion 21 is a cylindrical conductor open at both ends. That is, the second conductor portion 2 has an opening at one end. The other end 1r of the first conductor portion 1 protrudes outward from the opening.Figure 15 As shown, the other end of the second conductor portion 21 is branched into two parts. For example, two slits are formed along both sides of the first conductor portion 1 from the opening on the other end. As a result, on the other end of the second conductor portion 21, the portion located on the upper side of the first conductor portion 1 and the portion located on the lower side of the first conductor portion 1 can be branched. Terminals 32b are connected to the two branches of the second conductor portion 21. That is, in the direction of the central axis A, two terminals 32b are connected to the end of the second conductor portion 2 on the side opposite to the side where the first through hole H1 is formed. Figure 15 As shown, the two terminals 32b are configured to clamp the terminal 31b.

[0075] In this way, the coaxial cable 100b can be used as a module that converts two terminals to three terminals.

[0076] <Effects>

[0077] In the coaxial cable 100b described above, two terminals 32b are connected to the end of the second conductor portion 2 on the opposite side of the side where the first through hole H1 is formed, in the direction of the central axis A. In this way, the coaxial cable 100b can be used as a module that converts from two terminals to three terminals.

[0078] The embodiments disclosed herein should be considered illustrative rather than restrictive in all respects. At least two of the embodiments disclosed herein may be combined, provided there is no contradiction. The basic scope of this disclosure is not the foregoing description, but is indicated by the scope of protection claimed in this application, and is intended to include the meaning equivalent to the scope of protection claimed in this application, as well as all modifications within that scope.

[0079] The various forms of this disclosure will be recorded hereafter as appendices.

[0080] (Note 1)

[0081] A coaxial cable, wherein:

[0082] First conductor section; and

[0083] The second conductor section has an internal space and extends along the central axis.

[0084] The aforementioned first conductor portion includes a first conductor portion and a first insulating portion covering the surface of the aforementioned first conductor portion.

[0085] A first through hole is formed on the side surrounding the central axis in the second conductor portion.

[0086] The first conductor portion is inserted into the internal space through the first through hole.

[0087] (Note 2)

[0088] According to the coaxial cable described in Appendix 1, among which,

[0089] A second through hole is formed on the aforementioned side surface of the second conductor portion.

[0090] The first conductor portion has: one end located outside the second conductor portion from the first through hole; and another end located on the opposite side of the first end.

[0091] The other end extends to the outside of the second conductor portion via the second through hole.

[0092] (Note 3)

[0093] According to the coaxial cable described in Appendix 1 or 2, among which,

[0094] The aforementioned second conductor portion includes a second conductor portion and a second insulating portion.

[0095] The aforementioned second insulating portion covers the aforementioned second conductor portion.

[0096] (Note 4)

[0097] According to the coaxial cable described in Appendix 2 or 3, among which,

[0098] The material constituting the second conductor portion is a braided material.

[0099] (Note 5)

[0100] According to the coaxial cables described in any of the appendices 1 to 4, among which,

[0101] The material constituting the first conductor portion is a braided material.

[0102] (Note 6)

[0103] According to the coaxial cable described in Appendix 1, among which,

[0104] Along the central axis, two terminals are connected to the end of the second conductor portion on the opposite side of the side where the first through hole is formed.

[0105] (Note 7)

[0106] According to the coaxial cable described in any of the appendices 1 to 6, among which,

[0107] The first conductor portion and the second conductor portion described above are flat in shape.

[0108] (Note 8)

[0109] A method for manufacturing a coaxial cable, comprising:

[0110] The process of preparing the first conductor section and the second conductor section having an internal space;

[0111] The process of covering the first conductor portion with the first insulating portion;

[0112] The process of forming the first through hole and the second through hole in the second conductor portion mentioned above;

[0113] The process of allowing the first conductor portion to pass through the first through hole and the internal space to reach the second through hole; and

[0114] The process of covering the second conductor portion with the second insulating portion.

[0115] (Note 9)

[0116] According to the manufacturing method of coaxial cable described in Appendix 8, among which,

[0117] The process includes connecting terminals to both ends of the first conductor portion and the second conductor portion.

[0118] Explanation of reference numerals in the attached figures

[0119] 1…First conductor portion; 1c…Partial portion; 1l…One end; 1r…The other end; 2…Second conductor portion; 3, 31a, 31b, 32a, 32b…Terminals; 11…First conductor portion; 11s, 21s1…Surface; 12…First insulating portion; 20s…Side; 21…Second conductor portion; 21s2…Inner circumferential surface; 22…Second insulating portion; 24…Opening; 100a, 100b…Coaxial cable; A…Central shaft; H1…First through hole; H2…Second through hole; V…Internal space; b1, b2…Magnetic flux; h…Terminal hole.

Claims

1. A coaxial cable, characterized in that, have: First conductor section; and The second conductor section has an internal space and extends along the central axis. The first conductor portion includes a first conductor portion and a first insulating portion covering the surface of the first conductor portion. A first through hole is formed in the second conductor portion on the side surrounding the central axis. The first conductor portion is inserted into the internal space through the first through hole.

2. The coaxial cable according to claim 1, characterized in that, A second through hole is formed on the side surface of the second conductor portion. The first conductor portion has: one end located outside the second conductor portion from the first through hole; and another end located on the opposite side of said one end. The other end extends to the outside of the second conductor portion via the second through hole.

3. The coaxial cable according to claim 2, characterized in that, The second conductor portion includes a second conductor portion and a second insulating portion. The second insulating portion covers the second conductor portion.

4. The coaxial cable according to claim 3, characterized in that, The material constituting the second conductor portion is a braided material.

5. The coaxial cable according to claim 4, characterized in that, The material constituting the first conductor portion is a braided material.

6. The coaxial cable according to claim 1, characterized in that, Along the central axis, two terminals are connected to the end of the second conductor portion on the opposite side of the side where the first through hole is formed.

7. The coaxial cable according to any one of claims 1 to 6, characterized in that, The first conductor portion and the second conductor portion are flat in shape.

8. A method for manufacturing a coaxial cable, characterized in that, have: The process of preparing the first conductor section and the second conductor section having an internal space; The process of covering the first conductor portion with the first insulating portion; The process of forming the first through hole and the second through hole in the second conductor portion; The process of allowing the first conductor portion to pass from the first through-hole through the internal space to the second through-hole; and The process of covering the second conductor portion with the second insulating portion.

9. The method for manufacturing a coaxial cable according to claim 8, characterized in that, The process includes connecting terminals to both ends of the first conductor portion and the second conductor portion.

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