Cable with connector

Abstract

A cable (10) with a connector according to the present invention is provided with a connector (11) having a substrate (111) and a cable (20) connected to a contact (1111) of the substrate (111), the cable (20) having a plurality of electric wires (21) including coaxial electric wires (22), a center conductor (221) of the coaxial electric wires (22) being an unplated annealed copper wire and having a conductor cross-sectional area of 0.031 mm2 or more and 0.06 mm2 or less, and the cable (20) having a plurality of electric wires (21) including coaxial electric wires (22). The amount of attenuation of the coaxial wire (22) is from 5.1 dB / m to 8.1 dB / m (inclusive).

Description

Technical Field

[0001] The present disclosure relates to cables with connectors.

[0002] This application claims the priority based on Japanese Patent Application No. 2022-176174 filed on November 2, 2022, and cites all the contents described in the said Japanese Patent Application. Background Art

[0003] Patent document 1 discloses a multi-core cable comprising: at least two pairs of wires each consisting of two wires; at least two insulated wires; and a sheath covering the wire pairs and the surroundings of the insulated wires, wherein in a cross section of the cable perpendicular to the length direction, the wire pairs are arranged on the same circumference, and between each of the wire pairs, each insulated wire is arranged in contact with a wire on one side of the wire pair.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2017-4594 Summary of the invention

[0007] The cable with connector of the present disclosure has a connector and a cable, wherein the cable has a plurality of electric wires including a coaxial electric wire, wherein the central conductor of the coaxial electric wire is an unplated soft copper wire and the conductor cross-sectional area is 0.031 mm 2 Above and 0.06mm 2 Hereinafter, the connector includes a substrate, the cable is connected to a contact point of the substrate, and the attenuation of the coaxial wire is greater than or equal to 5.1 dB / m and less than or equal to 8.1 dB / m. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1A This is an explanatory diagram of a cable with a connector according to one embodiment of the present disclosure.

[0009] Figure 1B This is an explanatory diagram of a cable with a connector according to one embodiment of the present disclosure.

[0010] Figure 2 yes Figure 1A , Figure 1B Cross-sectional view at line A-A'.

[0011] Figure 3 This is a cross-sectional view of a coaxial wire included in a cable with a connector according to one aspect of the present disclosure. DETAILED DESCRIPTION

[0012] [Problems to be Solved by the Present Disclosure]

[0013] With the recent increase in the speed and capacity of information communication, the frequency band used is becoming higher. As the frequency band used increases, the attenuation increases, so cables are required to suppress the attenuation more than before.

[0014] Therefore, an object of the present disclosure is to provide a cable with a connector including a coaxial wire with suppressed attenuation.

[0015] [Effects of the present disclosure]

[0016] According to the present disclosure, it is possible to provide a cable with a connector including a coaxial electric wire with suppressed attenuation.

[0017] Hereinafter, a method for implementing the invention will be described.

[0018] [Description of Embodiments of the Present Disclosure]

[0019] First, the embodiments of the present disclosure are described by way of example. In the following description, the same or corresponding elements are denoted by the same reference numerals, and the same description thereof will not be repeated.

[0020] (1) A cable with a connector according to one aspect of the present disclosure has a connector and a cable, wherein the cable has a plurality of electric wires including a coaxial electric wire, wherein the center conductor of the coaxial electric wire is an unplated soft copper wire and the conductor cross-sectional area is 0.031 mm 2 Above and 0.06mm 2 Hereinafter, the connector includes a substrate, the cable is connected to a contact point of the substrate, and the attenuation of the coaxial wire is greater than or equal to 5.1 dB / m and less than or equal to 8.1 dB / m.

[0021] By setting the conductor cross-sectional area of ​​the center conductor of the coaxial cable to 0.031mm 2 Above and 0.06mm 2 The following can achieve high-speed digital transmission without increasing the size.

[0022] Furthermore, by using a bare annealed copper wire which is not plated as the central conductor, a cable with a connector including a coaxial electric wire with suppressed attenuation can be formed.

[0023] (2) A cable with a connector according to one aspect of the present disclosure has a connector and a cable, wherein the cable has a plurality of electric wires including a coaxial electric wire, wherein the center conductor of the coaxial electric wire is an unplated soft copper wire and the conductor cross-sectional area is 0.07 mm 2 Above and 0.13mm 2 Hereinafter, the connector includes a substrate, the cable is connected to a contact point of the substrate, and the attenuation of the coaxial wire is greater than or equal to 4.0 dB / m and less than or equal to 5.0 dB / m.

[0024] By setting the conductor cross-sectional area of ​​the center conductor of the coaxial cable to 0.07mm 2 Above and 0.13mm 2 The following can achieve high-speed digital transmission without increasing the size.

[0025] Furthermore, by using a bare annealed copper wire which is not plated as the central conductor, a cable with a connector including a coaxial electric wire with suppressed attenuation can be formed.

[0026] (3) A cable with a connector according to one aspect of the present disclosure has a connector and a cable, wherein the cable has a plurality of electric wires including a coaxial electric wire, wherein the center conductor of the coaxial electric wire is an unplated soft copper wire and the conductor cross-sectional area is 0.01 mm 2 Above and 0.025mm 2 Hereinafter, the connector includes a substrate, the cable is connected to a contact point of the substrate, and the attenuation of the coaxial wire is greater than or equal to 10 dB / m and less than or equal to 12 dB / m.

[0027] By setting the conductor cross-sectional area of ​​the center conductor of the coaxial cable to 0.01mm 2 Above and 0.025mm 2 The following can achieve high-speed digital transmission without increasing the size.

[0028] Furthermore, by using a bare annealed copper wire which is not plated as the central conductor, a cable with a connector including a coaxial electric wire with suppressed attenuation can be formed.

[0029] (4) In any one of the above (1) to (3), the cable may include one or more coaxial wires, and a time skew of the paired coaxial wires may be 10 ps / m or less.

[0030] By having the cable include more than one pair of coaxial wires, the coaxial wire pairs of the cable can be used for differential transmission purposes.

[0031] (5) In any one of the above (1) to (4), the cable may have a core formed by twisting the plurality of electric wires, and the cable may have: a concentrated shielding layer arranged outside the core; and an outer sheath arranged outside the concentrated shielding layer.

[0032] The centralized shielding layer of the cable can suppress the noise incident on the signal transmitted by the wire, especially the coaxial wire. In addition, the influence of the noise on the external equipment can be suppressed.

[0033] Furthermore, since the cable has an outer sheath, the electric wires arranged inside and the centralized shielding layer can be protected.

[0034] (6) In any one of the above (1) to (5), the coaxial electric wire may include an outer conductor disposed outside the central conductor, and the outer conductor may include an unplated soft copper wire.

[0035] When the outer conductor includes an unplated annealed copper wire, the attenuation amount of the coaxial electric wire including the outer conductor can be particularly suppressed compared to a case where the outer conductor includes a tinned annealed copper wire.

[0036] [Details of the embodiments of the present disclosure]

[0037] Hereinafter, a specific example of a cable with a connector according to an embodiment of the present disclosure (hereinafter referred to as "this embodiment") is described with reference to the accompanying drawings. It should be noted that the present invention is not limited to these examples, but is indicated by the claims, and is intended to include all changes within the meaning and scope equivalent to the claims.

[0038] In this specification, the names of components are sometimes described by adding "first", "second", etc., such as "first cover" and "second cover". "First", "second", etc. are only recorded to identify each component and prevent confusion during description, and do not indicate arrangement, priority, etc. Therefore, when there is no particular possibility of confusion or when explaining collectively, it can be expressed as "cover".

[0039] [Cable with connector]

[0040] Figure 1A 1 is a plan view of the connector and its surroundings of the cable with connector 10 according to the present embodiment. Figure 1B 1 shows a top view of the periphery of the substrate 111 inside the connector of the cable 10 with connector according to the present embodiment. Figure 1B In the figure, in order to understand the connection state between the connector and the cable 20, the description of the cover is omitted. Figure 1B The area 1113 is a portion where the electric wires coming out of the cable 20 are arranged, but is omitted from the illustration.

[0041] Figure 2 2 shows a configuration example of a cross section perpendicular to the long dimension of the cable 20 included in the cable with connector 10 according to the present embodiment. Figure 2 Equivalent to Figure 1A , Figure 1B Cross-sectional view at line A-A'.

[0042] Figure 3 It is an explanatory diagram of a cross section perpendicular to the long dimension of a coaxial electric wire included in the cable 20 .

[0043] It should be noted that Figure 1A to Figure 3This is a schematic diagram for explaining a configuration example of the cable with connector 10 according to the present embodiment, and the dimensions, number and arrangement of each member are not limited to this form.

[0044] like Figure 1A , Figure 1B As shown, the cable with connector 10 according to the present embodiment includes a connector 11 and a cable 20 .

[0045] like Figure 1A As shown, the connector 11 has: a first cover 1101 for accommodating and protecting the periphery of the connection between the cable 20 and the substrate; and a second cover 1102 for accommodating and protecting the periphery of the terminal connected to other devices. It should be noted that the configuration of the above-mentioned cover of the connector 11 is not limited to the above-mentioned mode, and any configuration can be adopted according to the type of the connector, etc.

[0046] Figure 1B 1101 and 1102 are removed. Figure 1B As shown, the connector 11 has a substrate 111. The substrate 111 connects the terminal 112 and the cable 20. The cable 20, specifically, the conductor 1112 of the electric wire included in the cable 20 is connected to the contact 1111 of the substrate 111. The conductor 1112 and the contact 1111 are electrically connected by solder, for example.

[0047] exist Figure 1B Although description of the wiring included in the substrate 111 is omitted, the wiring is configured to electrically connect the terminal 112 of the connector 11 and the contact 1111 .

[0048] Each member included in the cable with connector according to the present embodiment will be described.

[0049] (1) Connector

[0050] The connector 11 may include a terminal 112 for connecting the cable 20 to another device and a substrate 111. The configuration of the terminal 112 is not particularly limited and may have any configuration depending on the type of connection target, the required use, the device to be connected, and the like.

[0051] You can also set Figure 1A The various covers and the like shown are used to protect the substrate 111 , the wiring on the substrate 111 , the contacts 1111 , and the like.

[0052] (2) Cable

[0053] like Figure 2 As shown, the cable 20 may have a plurality of wires 21. The plurality of wires 21 may include a coaxial wire 22.

[0054] (2-1) Wires and cores of cables

[0055] (2-1-1) Coaxial cable

[0056] The cable 20 may have a coaxial wire 22 as the wire 21 .

[0057] The cable 20 may include a pair of two coaxial wires 22. That is, the cable 20 may include one or more coaxial wires 22. The paired coaxial wires 22 in the cable 20 may be used for differential transmission.

[0058] The two coaxial wires 22 forming a pair may be arranged close to each other. The coaxial wires 22 forming a pair do not need to be twisted with each other.

[0059] The cross section of the coaxial wire 22 perpendicular to the long dimension may have Figure 2 , Figure 3 That is, the coaxial wire 22 may include a central conductor 221, an insulator 222 disposed outside the central conductor 221, an outer conductor 223 disposed outside the insulator 222, and a sheath 224 disposed outside the outer conductor 223. The following describes the components of the coaxial wire 22.

[0060] (A) Center conductor

[0061] (size)

[0062] The coaxial wire 22 may be an electric wire thinner than AWG (American Wire Gauge) 25. The coaxial wire 22 may be, for example, a thin-diameter coaxial wire of any one of AWG26 to AWG36.

[0063] Therefore, the conductor cross-sectional area of ​​the central conductor 221 of the coaxial wire 22 can be set to 0.01 mm 2 Above and 0.13mm 2 Below, can also be 0.031mm 2 Above and 0.06mm 2 the following.

[0064] By setting the conductor cross-sectional area of ​​the central conductor 221 of the coaxial wire 22 to 0.01 mm 2 Above and 0.13mm 2 The following can achieve high-speed digital transmission without increasing the size.

[0065] The outer diameter of the central conductor 221 may be, for example, 0.45 mm or less, or may be 0.07 mm or more and 0.45 mm or less.

[0066] The central conductor 221 may be a stranded wire formed by twisting a plurality of conductor wires, or may be a single wire.

[0067] (Material)

[0068] In existing cables, tinned soft copper is often used as the center conductor of the coaxial wire. However, according to the research of the inventor of the present invention, by using an unplated soft copper wire, that is, a bare soft copper wire, as the center conductor 221, the attenuation can be suppressed compared to the case where tinned soft copper is used as the center conductor. Therefore, the center conductor 221 of the coaxial wire 22 of the cable with a connector of this embodiment can be made of an unplated soft copper wire. By making the center conductor 221 of the unplated soft copper wire, that is, a bare soft copper wire, a cable with a connector including a coaxial wire with suppressed attenuation can be formed.

[0069] Specifically, the attenuation of the coaxial wire 22 corresponding to the conductor cross-sectional area of ​​the center conductor can be made within a predetermined range as described below by using a bare soft copper wire for the center conductor 221. The attenuation below is the attenuation of the coaxial wire 22 alone without the connector.

[0070] The conductor cross-sectional area of ​​the center conductor is 0.031mm 2 Above and 0.06mm 2 In the case below, the attenuation of the coaxial cable 22 can be set to 5.1 dB / m or more and 8.1 dB / m or less.

[0071] The conductor cross-sectional area of ​​the center conductor is 0.07mm 2 Above and 0.13mm 2 In the case below, the attenuation of the coaxial cable 22 can be set to 4.0 dB / m or more and 5.0 dB / m or less.

[0072] In addition, the conductor cross-sectional area of ​​the center conductor is 0.01mm 2 Above and 0.025mm 2 In the case below, the attenuation of the coaxial cable 22 can be set to 10 dB / m or more and 12 dB / m or less.

[0073] It should be noted that according to the research of the inventors of the present invention, when tinned soft copper wire is used for the center conductor 221 and the conductor cross-sectional area of ​​each center conductor is set within the range, the attenuation of the coaxial wire 22 often exceeds the above range. The attenuation in this specification refers to the attenuation at 10 GHz.

[0074] In addition, as described above, the cable 20 may include two coaxial wires 22 in a group, that is, a pair of coaxial wires 22. Moreover, by using a bare soft copper wire for the center conductor 221 of the coaxial wire 22, the time lag of the pair of coaxial wires 22 can be suppressed. Specifically, by using a bare soft copper wire for the center conductor 221, the time lag of the pair of coaxial wires 22 can be made, for example, less than 10 ps / m. It should be noted that according to the research of the inventor of the present invention, when a tinned soft copper wire is used for the center conductor 221, the time lag of the pair of coaxial wires 22 exceeds 10 ps / m.

[0075] (B) Insulator

[0076] The material of the insulator 222 is not particularly limited. The insulator 222 may include a polymer material. Examples of the polymer material include one or more selected from fluororesins such as polyethylene, tetrafluoroethylene-hexafluoropropylene copolymer (FEP), tetrafluoroethylene-ethylene copolymer (ETFE), polytetrafluoroethylene (PFA), and polymethylpentene.

[0077] In addition to the above-mentioned polymer materials, the insulator 222 may further contain various additives such as flame retardants.

[0078] The material of the insulator 222 may or may not be cross-linked.

[0079] The insulator 222 can be formed by extruding a raw material including a polymer material around the central conductor 221. The outer diameter of the insulator 222 can be set to, for example, 0.2 mm or more and 1.0 mm or less.

[0080] (C) External conductor

[0081] The coaxial wire 22 may include an outer conductor 223 disposed outside the central conductor 221. Specifically, the outer conductor 223 is disposed outside the central conductor 221 via the insulator 222. The coaxial wire 22 includes the outer conductor 223, which can shield the intrusion of noise into the central conductor 221 from the outside and the emission of noise from the central conductor 221 to the outside.

[0082] The outer conductor 223 may be composed of a single layer of the outer conductor or may be composed of two or more layers of the outer conductor. In particular, from the viewpoint of improving the noise shielding effect in the coaxial wire 22, the outer conductor 223 may have two or more layers of the outer conductor. However, from the viewpoint of productivity, the outer conductor 223 may also be two layers.

[0083] The outer conductor 223 is Figure 3 As shown, for example, a first outer conductor 2231 and a second outer conductor 2232 may be provided.

[0084] Since the outer conductor 223 has the first outer conductor 2231 and the second outer conductor 2232 , a high noise shielding effect can be achieved compared to the case where only one type of outer conductor is used.

[0085] Hereinafter, a configuration example in which the outer conductor 223 has two layers of a first outer conductor 2231 and a second outer conductor 2232 will be described.

[0086] (C-1) First outer conductor

[0087] The first outer conductor 2231 may include, for example, a thin metal wire made of a metal material such as copper, copper alloy, aluminum, aluminum alloy, or a material on which the surface of these metal materials is plated. As the metal wire, a soft copper wire, a hard copper wire, etc. may also be used. The metal wire may be plated on the surface as described above, and examples of the plating include silver and tin. Therefore, as the metal wire, a silver-plated soft copper wire, a tin-plated soft copper wire, etc. may also be used.

[0088] The outer conductor 223 may include an unplated annealed copper wire. When the outer conductor 223 includes an unplated annealed copper wire, the attenuation of the coaxial wire 22 including the outer conductor 223 can be suppressed compared to the case where the outer conductor 223 includes a tinned annealed copper wire. Therefore, the metal fine wire included in the first outer conductor 2231 may include an unplated annealed copper wire. The metal fine wire may also be composed of an unplated annealed copper wire.

[0089] The first outer conductor 2231 can be formed by transversely winding or braiding the above-mentioned metal wire.

[0090] (C-2) Second outer conductor

[0091] The second outer conductor 2232 may be a film-shaped member having a metal layer, for example. Due to the presence of the metal layer, the second outer conductor 2232 can shield noise from entering the center conductor 221 from the outside and from being emitted from the center conductor 221 to the outside.

[0092] Examples of the metal layer of the second outer conductor 2232 include metal foil and metal film (evaporated layer). The second outer conductor 2232 may be composed of a metal layer alone or a composite material in which metal layers are stacked on a base material.

[0093] When the second outer conductor 2232 is a film-shaped member having a metal layer as described above, the material of the metal layer is not particularly limited, and examples thereof include metal materials such as copper, copper alloys, aluminum, and aluminum alloys. The metal layer may be composed of a layer of a single metal species, or may be a layer of two or more metal species stacked together. In addition, a material other than metal, such as a protective film composed of an organic material, may be disposed on the surface of the metal layer as required.

[0094] The second outer conductor 2232 may also have a substrate as described above. The material of the substrate is not particularly limited. Examples of the material of the substrate include polyester resins such as polyethylene terephthalate (PET), polyolefin resins such as polypropylene, and vinyl resins such as polyvinyl chloride. In addition to various polymer materials, the substrate may also contain various additives. As a polymer material, polyester resins may be preferably used from the viewpoint of excellent mechanical strength and flexibility.

[0095] (D) Skin

[0096] The outer skin 224 may be made of a polymer material. Examples of the polymer material include one or more selected from fluororesins such as polyethylene, polyvinyl chloride (PVC), and FEP.

[0097] In addition to the above-mentioned polymer materials, the outer skin 224 may also contain various additives such as flame retardants.

[0098] The material of the outer skin 224 may or may not be cross-linked.

[0099] The outer sheath 224 can be formed by extruding a raw material including a polymer material around the outer conductor 223 , etc. The outer sheath 224 can also be formed by winding a resin tape of a polyester resin such as polyethylene terephthalate around the outer periphery of the outer conductor 223 .

[0100] The outer diameter of the outer skin 224 can be set to, for example, 0.3 mm or more and 1.2 mm or less.

[0101] (2-1-2) Insulated wire

[0102] The cable 20 included in the cable with connector 10 of the present embodiment may include a plurality of electric wires 21. As described above, at least a portion of the electric wires 21 may be coaxial electric wires 22.

[0103] Furthermore, the cable 20 may include an insulated wire 23 as the wire 21 . The insulated wire 23 includes a conductor 231 and an insulator 232 disposed outside the conductor 231 .

[0104] (A) Conductor

[0105] The conductor 231 may be a stranded wire formed by twisting a plurality of conductor wires, or may be a single wire.

[0106] The material of the conductor 231 is not particularly limited, and for example, a copper alloy or copper can be used. As copper, annealed copper can also be used. The conductor 231 can also be an unplated annealed copper wire.

[0107] The outer diameter of the conductor 231 is not particularly limited, and can be set to, for example, 0.1 mm or more and 0.8 mm or less.

[0108] (B) Insulator

[0109] The material of the insulator 232 is not particularly limited. The insulator 232 may include a polymer material. Examples of the polymer material include one or more selected from fluororesins such as polyethylene, polyvinyl chloride, and FEP.

[0110] In addition to the above-mentioned polymer materials, the insulator 232 may also contain various additives such as flame retardants.

[0111] The material of the insulator 232 may or may not be cross-linked.

[0112] The insulator 232 can be formed by extrusion molding a raw material containing a polymer material around the conductor 231. The outer diameter of the insulator 232 can be set to, for example, 0.2 mm or more and 1.2 mm or less.

[0113] (2-1-3) Core wire

[0114] The number and structure of the electric wires 21 of the cable 20 are not particularly limited and can be arbitrarily selected according to the characteristics required for the cable 20. Figure 2 , an example of a cable 20 including one type of coaxial wire 22 and one type of insulated wire 23 having the same structure is shown, but the present invention is not limited to this embodiment. For example, a cable including two or more types of coaxial wires 22 and two or more types of insulated wires 23 having different structures such as outer diameters and different materials may be used. In addition, a part or all of the insulated wires 23 may be twisted in advance in groups of two to form a twisted pair of insulated wires.

[0115] The plurality of electric wires 21 included in the cable 20 may be collectively twisted in a spiral shape and assembled to form the core wire 200. That is, the cable 20 may include the core wire 200 in which the plurality of electric wires 21 including the coaxial electric wire 22 are twisted.

[0116] The arrangement of the wires 21 in the core wire 200 is not particularly limited. Figure 2 As shown, in the cross section perpendicular to the long dimension of the cable 20, the paired coaxial wires 22 may also be arranged on the same circumference. The coaxial wires 22 of the cable 20 may also be arranged so that the central conductors 221 are located on the same circumference. However, the above-mentioned same circumference does not have a strict geometric meaning. For example, the central conductor 221 may be offset from the circumference due to manufacturing errors or movement of the wires in use. In addition, it is also allowed that the circle is not a perfect circle, but an ellipse.

[0117] If necessary, a plurality of tensile-resistant fibers made of aramid fibers, fillers made of rayon, etc. may be arranged between the electric wires 21 constituting the core wire 200 .

[0118] (2-2) Other components of the cable

[0119] (2-2-1) Rolling

[0120] A crimp 24 may also be provided around the core wire 200 .

[0121] Since the cable 20 has the crimp 24 , the electric wires 21 included in the cable 20 can be bundled in a stable manner.

[0122] As the press roll 24, for example, a resin tape can be used.

[0123] Examples of the resin used for the resin belt include one or more selected from fluororesins such as polytetrafluoroethylene (PTFE) resin, polyester resins such as polyethylene terephthalate (PET) resin, and polyethylene (PE) that are excellent in heat resistance and wear resistance.

[0124] In order to make the resin tape used as the roll 24 conductive, the resin tape used as the roll 24 may contain a conductive substance such as carbon. The conductive substance may be added in a dispersed manner in the resin constituting the resin tape. In addition, for example, a metal tape having copper foil or aluminum foil disposed on the surface of the resin tape may also be used.

[0125] The winding direction of the roll 24 may be the same direction as the twisting direction of the wires 21 constituting the core wire 200, or may be the opposite direction to the twisting direction of the wires 21 constituting the core wire 200. It should be noted that as the roll 24, a metal tape made of copper foil, aluminum foil, etc. may be used instead of the above-mentioned resin tape.

[0126] Since the cable 20 has the crimp 24, when the concentrated shield layer 25 described later is arranged outside the core wire 200, the outer skin 224 and the insulator 232 of the electric wire 21 constituting the core wire 200 can be prevented from being damaged. When the crimp 24 has conductivity, the influence of noise on an external device other than the cable 20 or the influence of noise from the external device can be suppressed. In addition, since the crimp 24 has conductivity, the attenuation of the signal transmitted by the electric wire 21 can be particularly suppressed.

[0127] (2-2-2) Centralized shielding layer

[0128] The cable 20 may include a concentrated shielding layer 25 disposed outside the core wire 200 .

[0129] It should be noted that, as described above, another member such as the crimp 24 may be disposed between the core wire 200 and the concentrated shield layer 25 .

[0130] The concentrated shielding layer 25 may include a thin metal wire made of a metal material such as copper, copper alloy, aluminum, aluminum alloy, or a material plated on the surface of these metal materials. As the metal wire, a soft copper wire, a hard copper wire, etc. may also be used. The metal wire may be plated on the surface as described above, and examples of the plating include silver and tin. Therefore, as the metal wire, a silver-plated soft copper wire, a tin-plated soft copper wire, etc. may also be used.

[0131] The concentrated shield layer 25 can be formed by, for example, transversely winding or braiding the above-mentioned metal thin wires.

[0132] Since the cable 20 has the integrated shield layer 25, it is possible to suppress the occurrence of noise accompanying the signal transmitted by the electric wire 21, especially the coaxial electric wire 22. In addition, it is possible to suppress the influence of the noise on external devices.

[0133] (2-2-3) Skin

[0134] The cable 20 may have a sheath 26 disposed outside the concentrated shielding layer 25 .

[0135] The material of the outer skin 26 is not particularly limited. The outer skin 26 may be made of a polymer material. Examples of the polymer material include polyolefins such as polyethylene, polyvinyl chloride (PVC), and thermoplastic elastomers (TPE).

[0136] In addition to the above-mentioned polymer materials, the outer skin 26 may contain various additives such as flame retardants.

[0137] The material of the outer skin 26 may or may not be cross-linked.

[0138] The outer diameter of the outer tube 26 can be set to, for example, 2.0 mm or more and 6.0 mm or less.

[0139] Since the cable 20 has the outer sheath 26 , the electric wires 21 and the integrated shield layer 25 disposed inside can be protected.

[0140] (2-3) Regarding the length of the cable

[0141] The length of the cable with connector of the present embodiment, i.e., the length along the long dimension, is not particularly limited. For example, the length of the coaxial wire or the cable including the coaxial wire may be selected so that the attenuation of the coaxial wire included in the cable with connector including the connector is 7.5 dB or less.

[0142] For example, when the attenuation of the coaxial wire included in the cable with connector including the connector is set to 7.5 dB or less, it is considered that the cable includes the coaxial wire with an attenuation of 13 dB / m. When the attenuation of the coaxial wire in the cable alone excluding the connector is designed to be 6 dB or less, the length of the cable including the coaxial wire can be set to 0.46 m or less.

[0143] Example

[0144] The present invention will be described below with reference to specific examples, but the present invention is not limited to these examples.

[0145] (Evaluation method)

[0146] First, a method for evaluating cables produced in the following experimental examples will be described.

[0147] (1) Attenuation

[0148] For a 1 m long cable including a coaxial wire produced in the following experimental example, a connector-equipped cable with USB-C connectors mounted on both ends was measured using a network analyzer (manufactured by Agilent). The evaluation results are shown in the "Attenuation" column of Table 1.

[0149] In addition, the attenuation of the coaxial wire was measured for a single cable without a connector and having a length of 1 m produced in the following experimental example. The evaluation results are shown in the column "Attenuation of Single Cable" in Table 1.

[0150] (Experimental example)

[0151] Experimental Examples 1-1, 2-1, 3-1, 4-1, and 5-1 are embodiments, and Experimental Examples 1-2, 1-3, 2-2, 2-3, 3-2, 3-3, 4-2, 4-3, 5-2, and 5-3 are comparative examples.

[0152] Hereinafter, the configuration of the cable with a connector produced in each experimental example will be described.

[0153] [Experimental Example 1-1]

[0154] A cable including a plurality of coaxial wires of the configuration shown in Table 1 as a plurality of wires is prepared. In Table 1, the soft copper wire of the material of the center conductor refers to an uncoated soft copper wire. A stranded wire is used as the center conductor of the coaxial wire. It should be noted that a plurality of wires are twisted to form a core wire, and a crimp, a centralized shielding layer, and a sheath shown in Table 1 are sequentially arranged outside the core wire. In addition, the cable includes a group of two coaxial wires. Then, USB-C connectors are assembled at both ends of the cable to form a cable with connectors.

[0155] The above-mentioned attenuation evaluation was performed on the obtained cable with a connector and the cable itself. Table 1 shows the evaluation results of the attenuation at 10 GHz.

[0156] [Experimental Example 1-2, Experimental Example 1-3]

[0157] The material of the center conductor of the coaxial wire included in the cable was changed to that shown in Table 1. A cable with a connector was produced under the same conditions as in Experimental Example 1-1 except for the above, and the attenuation was evaluated. The evaluation results are shown in Table 1.

[0158] [Experimental Examples 2-1 to 2-3, Experimental Examples 3-1 to 3-3, Experimental Examples 4-1 to 4-3, Experimental Examples 5-1 to 5-3]

[0159] The size and material of the center conductor were changed to those shown in Table 1. A cable with a connector was produced under the same conditions as in Experimental Example 1-1 except for the above, and the attenuation was evaluated. The evaluation results are shown in Table 1.

[0160] [Table 1]

[0161]

[0162] From the results shown in Table 1, it can be confirmed that by using an unplated annealed copper wire as the center conductor of the coaxial wire, the attenuation is suppressed and the electrical characteristics are excellent compared with the case where a tin-plated annealed copper wire with the same conductor cross-sectional area as the center conductor of the coaxial wire is used. In addition, it can be confirmed that by using an unplated annealed copper wire as the center conductor, the attenuation equivalent to that of a silver-plated annealed copper wire can be achieved, and the material cost can be suppressed. It can also be confirmed that the above tendency is the same regardless of the size of the center conductor.

[0163] Description of Reference Numerals

[0164] 10: Cable with connector;

[0165] 11: Connector;

[0166] 1101: first cover;

[0167] 1102: second cover;

[0168] 111: Substrate;

[0169] 1111: Contact;

[0170] 1112: Conductor;

[0171] 1113: Region;

[0172] 20: Cable;

[0173] 200: core wire;

[0174] 112: terminal;

[0175] 21: Wires;

[0176] 22: coaxial wire;

[0177] 221: center conductor;

[0178] 222: Insulator;

[0179] 223: external conductor;

[0180] 2231: first outer conductor;

[0181] 2232: second outer conductor;

[0182] 224: skin;

[0183] 23: Insulated wire;

[0184] 231: Conductor;

[0185] 232: Insulator;

[0186] 24: Pressing;

[0187] 25: centralized shielding layer;

[0188] 26: Skin.

Claims

1. A cable with a connector, comprising a connector and a cable, The cable has a plurality of wires including coaxial wires, The central conductor of the coaxial wire is an unplated soft copper wire, and the conductor cross-sectional area is 0.031mm 2 Above and 0.06mm 2 the following, The connector has a substrate, and the cable is connected to a contact point of the substrate. The attenuation of the coaxial wire is greater than or equal to 5.1 dB / m and less than or equal to 8.1 dB / m.

2. A cable with a connector, comprising a connector and a cable, The cable has a plurality of wires including coaxial wires, The central conductor of the coaxial wire is an unplated soft copper wire, and the conductor cross-sectional area is 0.07 mm 2 Above and 0.13mm 2 the following, The connector has a substrate, and the cable is connected to a contact point of the substrate. The attenuation of the coaxial wire is greater than or equal to 4.0 dB / m and less than or equal to 5.0 dB / m.

3. A cable with a connector, comprising a connector and a cable, The cable has a plurality of wires including coaxial wires, The central conductor of the coaxial wire is an unplated soft copper wire, and the conductor cross-sectional area is 0.01mm 2 Above and 0.025mm 2 the following, The connector has a substrate, and the cable is connected to a contact point of the substrate. The attenuation of the coaxial wire is greater than or equal to 10 dB / m and less than or equal to 12 dB / m.

4. The cable with a connector according to any one of claims 1 to 3, wherein: The cable has more than one pair of coaxial wires. The time skew of the paired coaxial wires is 10 ps / m or less.

5. The cable with a connector according to any one of claims 1 to 3, wherein: The cable has a core wire formed by twisting the plurality of electric wires. The cable comprises: a concentrated shielding layer arranged outside the core wire; as well as The outer skin is arranged outside the centralized shielding layer.

6. The cable with a connector according to any one of claims 1 to 3, wherein: The coaxial wire has an outer conductor arranged outside the central conductor, and the outer conductor includes an unplated soft copper wire.

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