Cables, power cables

Abstract

This invention provides a cable and power cable with a novel energy stabilization structure, capable of suppressing the influence of external noise and supplying stable energy and signals. The cable of this invention comprises: a plurality of conductors, each covered by an insulator; a sheath binding the plurality of conductors; and at least two sets of shielded conductor bundles, each bundle of conductors having undergone insulating film treatment, and each bundle being coiled on the outer peripheral side of the sheath. At least one of the plurality of conductors serves as the shielding center line. One end of the first set of shielded conductor bundles serves as a connection terminal to the primary side of the conductor, and the other end of the shielded conductor bundle serves as a connection terminal to the grounding wire on the secondary side. One end of the second set of shielded conductor bundles serves as a connection terminal to the secondary side of the conductor, and the other end of the shielded conductor bundle serves as a connection terminal to the grounding wire on the primary side.

Description

Technical Field

[0001] This invention relates to cables and power cables. Background Technology

[0002] Among cables used in power cables, signal cables, etc., there are known single-core cables with a single conductor (also called core wire) and multi-core cables with two or more cores. These cables typically consist of a conductor covered by insulation and a sheath covering one or more conductors.

[0003] In cables, as a countermeasure against external noise, there are cables with shielding components on the inner circumference of the sheath covering the conductor. The shielding components are usually formed by braided strands of copper wire, aluminum wire, etc., or spiral windings of copper tape, etc.

[0004] For example, in the case of power cables and signal cables used in audio equipment, the impact of external noise is particularly evident in sound quality. Therefore, continuous improvements are being made to the shielding structure to suppress the effects of external noise and improve sound quality. Of course, this is not limited to audio equipment; cables with internal conductors are also affected by external noise, so improvements to the shielding structure are also desired in other fields and applications.

[0005] Existing technical documents Patent Document 1: Japanese Patent No. 4282759 Patent Document 2: Japanese Patent Publication No. 2013-518360 Patent Document 3: Japanese Patent Application Publication No. 2012-33791 Patent Document 4: Japanese Utility Model Registration No. 3238829 Summary of the Invention

[0006] The technical problem that the invention aims to solve The present invention was made based on the following circumstances, and its purpose is to provide a cable or power cable with an energy stabilization structure that has not been seen before, capable of suppressing the influence of external noise and supplying stable energy and signals.

[0007] Technical solutions for solving technical problems The main points of this invention are as follows.

[0008] (1) The cable of the present invention is characterized in that it comprises: a plurality of conductors, each covered by an insulator; a sheath for binding the plurality of conductors; and at least two sets of shielded conductor bundles, which are bundles of a plurality of conductors that have been treated with insulating film, and are coiled on the outer peripheral side of the sheath, wherein at least one of the plurality of conductors is used as a shielding center line, one end of the first set of shielded conductor bundles is used as a connection end connected to the primary side of the conductor, and the other end of the shielded conductor bundles is used as a connection end connected to the grounding wire of the secondary side, and one end of the second set of shielded conductor bundles is used as a connection end connected to the secondary side of the conductor, and the other end of the shielded conductor bundles is used as a connection end connected to the grounding wire of the primary side.

[0009] (2) A braided shielding member is formed by braiding multiple sets of the shielding wire bundles to cover the outer peripheral surface of the sheath, and any two sets of the shielding wire bundles are connected to the conductor that serves as the shielding center line.

[0010] (3) The two sets of shielded wire bundles are wound in the same direction from the primary side to the secondary side, and do not cross each other.

[0011] (4) The power cable of the present invention is characterized in that it comprises: a plurality of conductors, each covered by an insulator; a sheath for binding the plurality of conductors; and at least two sets of shielded wire bundles, which are bundles of a plurality of conductors each covered by an insulating layer, each of which is coiled on the outer peripheral side of the sheath, wherein at least one of the plurality of conductors is used as a shielding center line, one end of the first set of shielded wire bundles is connected to the primary side of the conductor, and the other end of the shielded wire bundles is connected to the grounding wire on the connector side, one end of the second set of shielded wire bundles is connected to the secondary side of the conductor, and the other end of the shielded wire bundles is connected to the grounding wire on the power plug side.

[0012] (5) The cable of the present invention is characterized in that it comprises: a conductor covered by an insulator; and at least two sets of shielded wire bundles, which are bundles of multiple wires that have been treated with insulating film respectively, and are coiled on the outer peripheral side of the conductor respectively, the conductor is used as a shielding center line, one end of the first set of shielded wire bundles is connected to one end of the conductor, and one end of the second set of shielded wire bundles is connected to the other end of the conductor.

[0013] Invention Effects According to the present invention, at least two sets of shielded conductor bundles are bundles of multiple conductors, each having undergone insulation coating treatment. Coils are wound around the outer peripheral surface of the sheath binding the multiple conductors. For example, one conductor is used as the shielding center line. One end of the first set of shielded conductor bundles serves as the connection terminal to the primary side of the conductor, and the other end serves as the connection terminal to the ground wire on the secondary side. One end of the second set of shielded conductor bundles serves as the connection terminal to the secondary side of the conductor, and the other end serves as the connection terminal to the ground wire on the primary side. This enables a novel energy stabilization structure, previously unseen, to be achieved. As a result, a cable capable of suppressing the effects of external noise and supplying stable energy and signals can be provided.

[0014] Furthermore, actual tests have confirmed that if this cable is used for power or signal cables, such as those for audio equipment, it can achieve a high level of noise cutoff, resulting in an extremely quiet environment and stable, noise-free sound quality. Attached Figure Description

[0015] Figure 1 This is a photographic image of a power cable using the cable described in an embodiment of the present invention.

[0016] Figure 2 This is a cross-sectional view of the aforementioned cable.

[0017] Figure 3 This is a photographic image of the internal structure of the aforementioned cable.

[0018] Figure 4 This is an enlarged photograph of the braided shielding of the aforementioned cable.

[0019] Figure 5 This is an explanatory diagram of the braided shielding of the aforementioned cable.

[0020] Figure 6 This is an explanatory diagram of the braided shielding of the aforementioned cable.

[0021] Figure 7 This is an explanatory diagram of the braided shielding of the aforementioned cable.

[0022] Figure 8 This is an explanatory diagram of the braided shielding of a comparative example cable. Detailed Implementation

[0023] Hereinafter, a preferred embodiment of the cable and power cable of the present invention will be described in detail with reference to the accompanying drawings. However, the scope of the present invention is not limited to the embodiments described below.

[0024] (First Implementation) Figure 1This refers to a power cable 10 for an audio device using the cable 1 of the first embodiment. As a preferred example, cable 1 is a single-phase 100V 3-core cable. However, it can also be a single-core cable or a multi-core cable other than 3-core. Furthermore, it is not limited to single-phase 100V. A power plug 2 is connected to the primary side of the power cable 10, and a connector 21 is connected to the secondary side. This power cable 10 has been tested and confirmed to provide stable sound quality by suppressing the effects of external noise, making it suitable for use in audio devices. However, its application is not limited; it can be used in any device as a power cable for supplying power.

[0025] As an example Figure 1 The power plug 2 is shown as a grounding type plug (grounding 2P) with two flat pins 22 and a grounding pin 23, but other types of plugs are also possible. For example, hook-type or anti-detachment type plugs. Furthermore, it is not limited to type A, which is widely used domestically; for example, it can be used overseas, choosing one of types B, C, B3, BF, SE, O, or O2. Connector 21 can also be selected according to the model corresponding to the device. Figure 1 Connector 21 is shown as an example of a 3P female connector (IEC C13).

[0026] Especially as Figure 2 and Figure 3 As shown, cable 1 is a circular 3-core cable with three conductors 3 arranged inside. The cable 1 has three conductors 3 respectively covered by insulation 31, filler 32 as intermediate sheath, shield 33, intermediate sheath 34, shield 35, intermediate sheath 36, braided shield 37, and overall sheath 38.

[0027] Each conductor 3 is formed of a highly conductive metal such as copper. It can be stranded or single-wire. The insulation 31 covering each conductor 3 is made of, for example, heat-resistant PVC. The insulation 31 of each conductor 3 can be, for example, black, white, or red. The three conductors 3, covered by the insulation 31, are bundled in a radial pattern from the center of the cable 1 and brought together using filler 32. That is, filler 32 is an example of a sheath used to bundle multiple conductors. The filler 32 is made of, for example, PVC. Alternatively, the three conductors 3 can be bundled side-by-side or by twisting. Furthermore, as a preferred example, a round 3-core cable is shown, but a flat 3-core cable with the three conductors 3 arranged in a row can also be used.

[0028] Shielding element 33, as the first shielding element, is disposed between the outer peripheral surface of the filler 32 and the inner peripheral surface of the intermediate sheath 34. As an example, this shielding element 33 is a general transversely wound shielding element made of metal such as copper wire. The intermediate sheath 34 is made of, for example, PVC. Shielding element 35, as the second shielding element, is disposed between the outer peripheral surface of the intermediate sheath 34 and the inner peripheral surface of the intermediate sheath 36. As an example, this shielding element is a shielding element formed by winding a metal sheet such as magnesium sheet in one direction, as detailed in Japanese Patent No. 4282759 of the inventors. Shielding elements 33 and 35 can also be other types of shielding elements. Furthermore, it is preferable to have both shielding elements 33 and 35, but since the new braided shielding element 37 described later is provided, it may not be necessary to provide both.

[0029] The braided shield 37 is disposed as a third shield between the outer peripheral surface of the intermediate sheath 36 and the inner peripheral surface of the overall sheath 38. That is, the braided shield 37 is disposed on the outer peripheral surface of the sheath (filler 32 in this example) that bundles the three conductors.

[0030] Especially as Figure 4 As shown, the braided shielding 37 is a shielding component made of multiple wires 4 braided together. However, the structure of the braided shielding 37 in this embodiment differs from that of a typical braided shielding component. First, each wire 4 is insulated from the others by undergoing an insulating coating treatment. This is the first attempt in the audio industry, thereby preventing the generation of resistance and compound resonance. Then, bundles of multiple wires 4 that have undergone insulating coating treatment (hereinafter referred to as "shielded wire bundles 41") are braided together. As an example, bundles of 10 wires 4 with an outer diameter of approximately 0.15 mm are grouped together and braided with 16 groups of shielded wire bundles 41. The size of the wires 4 and the number of wires in a group can be appropriately changed. As an example of the wires 4, wires with insulating coating treatment on conductive metal wires such as copper wires are used. As an example, the insulating coating is preferably a coating of insulating material such as polyurethane coating. Furthermore, coating can be applied thereon. In the case of coloring or color differentiation, this coating can be used, for example. Furthermore, the insulating coating treatment is not limited to a liquid material coating, but can also cover an insulator.

[0031] Second, from the multiple sets of shielded wire bundles 41 constituting the braided shield 37, at least two sets of shielded wire bundles 41 (41A, 41B) are connected to the ground wire. The two sets of shielded wire bundles 41A and 41B connected to the ground wire are at least two sets of shielded wire bundles 41A and 41B that have been coiled in a specified direction. Figure 4In the example, two of the three sets of shielded wire bundles are colored black. These two sets of shielded wire bundles 41A and 41B are wound in parallel coils spaced apart from each other in the same direction from the primary side of cable 1 towards the secondary side. Regarding the direction of the coil winding, if it is right-handed when viewed from the primary side, it can block noise, making it suitable as a countermeasure against external noise. Furthermore, winding the coils in parallel can also block noise, making it suitable as a countermeasure against external noise. However, as long as they do not cross each other, they do not need to be precisely parallel.

[0032] Of the 16 groups of shielded wire harnesses 41, 13 groups are colored white and 3 groups are colored black. Thus, as... Figure 4 As shown, this improves the design of cable 1 and makes it easier to identify the shielded conductor bundles 41A and 41B connected to the ground wire. Of course, it is not limited to white and black. Therefore, the overall sheath 38 is formed of a transparent material. The material of the overall sheath 38 is, for example, transparent PVC. Furthermore, in Figure 1 , Figure 3 , Figure 4 During the process, the entire protective cover was removed 38 times for filming.

[0033] Next, refer to Figure 5 This section details the configuration of connecting two sets of shielded conductor bundles 41A and 41B to the ground wire. First, in this embodiment, one of the three conductors 3 (conductor 3C) is used as the "shielded center wire." The other conductors 3A and 3B are used for power supply. Conductor 3C, used as the shielded center wire, is typically connected to the ground wires 23 and 24 of the power plug 2 and connector 21. However, in this embodiment, conductor 3C is used as the "shielded center wire" serving as the energy reference by connecting it as follows: One end (connection end) of the first set of shielded conductor bundles 41A is connected to the primary side of conductor 3C. The other end (connection end) of the first set of shielded conductor bundles 41A is connected to the ground wire 24 of connector 21. Then, one end (connection end) of the second set of shielded conductor bundles 41B is connected to the secondary side of conductor 3C. The other end (connection end) of the second set of shielded conductor bundles 41B is connected to the ground wire 23 of the power plug 2. The primary and secondary sides of conductor 3C, which serves as the shielding center wire, do not need to be connected to the grounding wire 23 of power plug 2 and the grounding wire 24 of connector 21. This is because connecting them would create a ground loop, which would result in a muffled sound when used with audio equipment.

[0034] Through this configuration, actual experiments confirmed that a high level of noise cutoff can be achieved, resulting in an extremely quiet environment and stable, noise-free sound quality. Specifically, it was confirmed that when a shielded wire bundle 41 is constructed from bundles of mutually insulated wires 4 treated with an insulating film, and two sets of coils with identical IN and OUT directions are wound around the shielded wire bundle 41A and 41B and connected to a reference energy line (shielding center line), with the two sets of coils wound around the shielded wire bundle 41A and 41B arranged in parallel, an unprecedented energy stabilization structure can be achieved, resulting in a high level of noise cutoff. The reason for this is speculated to be the ease with which noise-insensitive photons and a zero ground field can be generated.

[0035] Furthermore, the wiring of shielded wire harnesses 41A and 41B relative to conductor 3C, grounding wire 23 of power plug 2, and grounding wire 24 of connector 21 can also be reversed.

[0036] (Second Implementation) like Figure 6 As shown, this embodiment is a variation where the two sets of shielded conductor bundles 41A and 41B connected to the ground wire are changed to shielded conductor bundles 41A and 41C. Other configurations are the same as in the first embodiment, therefore detailed descriptions are omitted. Figure 6 As shown, in the second embodiment, the cable 1 connects two sets of shielded wire bundles 41A and 41C, which are coiled in different directions from the primary side to the secondary side, to the ground wire. That is, the first set of shielded wire bundles 41A is right-handed when viewed from the primary side, and the second set of shielded wire bundles 41C is left-handed when viewed from the primary side. Therefore, although there are some local crossing points, the insulation coating treatment of each wire 4 prevents the generation of resistance and composite resonance.

[0037] In this embodiment, one of the three conductors 3 (conductor 3C) is also used as the "shielding center line". Then, one end (connection end) of the first set of shielded conductor bundles 41A is connected to the primary side of conductor 3C. The other end (connection end) of the first set of shielded conductor bundles 41A is connected to the grounding wire of connector 21. One end (connection end) of the second set of shielded conductor bundles 41C is connected to the secondary side of conductor 3C. The other end (connection end) of the second set of shielded conductor bundles 41C is connected to the grounding wire of power plug 2. The primary and secondary sides of conductor 3C, which serves as the shielding center line, may not be connected to the grounding wire 23 of power plug 2 or the grounding wire 24 of connector 21. While this configuration has a smaller effect compared to the first embodiment, actual tests have confirmed that a higher noise cutoff effect can be obtained compared to the past.

[0038] Furthermore, the wiring of shielded wire harnesses 41A and 41C relative to conductor 3C, grounding wire 23 of power plug 2, and grounding wire 24 of connector 21 can also be reversed. Alternatively, shielded wire harnesses 41B and 41C can be used in the same manner instead of shielded wire harness 41A.

[0039] (Third implementation method) like Figure 7 As shown, this embodiment is a variation in which one end (connection end) of four sets of shielded wire bundles 4 from the right-handed multi-set shielded wire bundles 4 is connected to the secondary side of conductor 3C, and the other end (connection end) is connected to the grounding wire 23 of power plug 2. In this case, the surface area covering the cable 1 is increased, thereby achieving a higher noise cutoff effect, but the operating efficiency is poor and some phase intuition is poor. In contrast, the first embodiment has a simple structure and can achieve the same effect, therefore it is considered the optimal configuration. Thus, the shielded wire bundles 4 connected to the shielding center line can be set to two or more sets. Setting multiple sets is not limited to right-handed; multiple sets of left-handed wire bundles can also be used.

[0040] Furthermore, the wiring of shielded wire harnesses 41A and 41B relative to conductor 3C, grounding wire 23 of power plug 2, and grounding wire 24 of connector 21 can also be reversed. Alternatively, the wiring of shielded wire harnesses 41A and 41C can be performed in the same manner as in the second embodiment.

[0041] As a comparative example, such as Figure 8 As shown, without using one of the three conductors (conductor 3C) as the "shielding center line," that is, when the three sets of shielded wire bundles 41A, 41B, and 41C are connected in series to the ground wire, only the same noise cutoff effect as a general braided shield can be obtained.

[0042] Furthermore, while the above embodiment has been described using a power cable 10 as an example, it can also be a signal cable. By using cable 1 to achieve an energy stabilization structure, a high noise cutoff effect is obtained. Moreover, it is not limited to a 3-core cable; even single-core cables and multi-core cables other than 3 cores (e.g., 4-core cables, 3×3 core cables, etc.) can achieve the same effect. Additionally, a conductor serving as the shielding center line can be provided separately. In this case, its diameter can also be different from the other conductors 3. Furthermore, the conductor serving as the shielding center line can be positioned further outward than the filler 32. Figure 2In some cases, an insulator-covered conductor may be placed between the intermediate sheath 34 and the intermediate sheath 36 as the shielding center line. In this case, the intermediate sheath 36 is an example of a sheath that bundles multiple conductors and has the shielding wire bundle 4 coiled around its outer peripheral surface. As a preferred example, the shielding center line is a single conductor, but two or more conductors may also be used as the shielding center line.

[0043] Similarly, if a bracelet, necklace, or similar garment using cable 1 is created, effects such as improved blood flow can be expected. In this case, a single-core cable is used, with the inner conductor serving as the shielding center line. Then, one end (connection terminal) of the first set of shielded wire bundles 41A is connected to one end of the inner conductor, and one end (connection terminal) of the second set of shielded wire bundles 41B is connected to the other end of the inner conductor. The other ends (connection terminals) of the first set of shielded wire bundles 41A and the second set of shielded wire bundles 41B are in contact with the wearer's skin.

[0044] As described above, the power cable 10 using the cable 1 of this embodiment can provide a cable 1 and power cable 10 with an unprecedented new energy stabilization structure, capable of suppressing the influence of external noise and supplying stable energy and signals.

[0045] Although the invention has been described in detail with reference to specific embodiments, it will be apparent to those skilled in the art that various substitutions, modifications, alterations, etc., regarding form and detail can be made without departing from the spirit and scope of the invention as defined by the claims.

[0046] Explanation of reference numerals in the attached figures 1. Cable 10 Power cable 3 conductors 31 Insulators 32 Filler 37 Braided Shielding 4. Wires that have undergone insulation coating treatment 41 Shielded wire harness.

Claims

1. A cable, characterized in that, have: Multiple conductors, each covered by an insulator; Sheath, binding the plurality of conductors; and At least two sets of shielded wire bundles, each consisting of multiple wires that have undergone insulation coating treatment, are coiled and wound on the outer peripheral surface of the sheath. At least one of the plurality of conductors is used as the shielding center line. One end of the first set of shielded wire bundles is used as the connection terminal to the primary side of the conductor, and the other end of the shielded wire bundle is used as the connection terminal to the ground wire of the secondary side. One end of the second set of shielded wire bundles is used as the connection terminal to the secondary side of the conductor, and the other end of the shielded wire bundle is used as the connection terminal to the ground wire of the primary side.

2. The cable according to claim 1, characterized in that, Multiple sets of shielding wire bundles are braided to form a braided shield covering the outer peripheral surface of the sheath, and any two sets of shielding wire bundles are connected to the conductor that serves as the shielding center line.

3. The cable according to claim 1 or 2, characterized in that, The two sets of shielded wire bundles are coiled in the same direction from the primary side to the secondary side, and do not cross each other.

4. A power cable, characterized in that, have: Multiple conductors, each covered by an insulator; Sheath, binding the plurality of conductors; and At least two sets of shielded wire bundles, each consisting of multiple wires covered by an insulating layer, are coiled on the outer peripheral surface of the sheath. At least one of the plurality of conductors is used as the shielding center line. Connect one end of the first set of shielded wire bundles to the primary side of the conductor, and connect the other end of the shielded wire bundles to the ground wire on the connector side. Connect one end of the second set of shielded wire bundles to the secondary side of the conductor, and connect the other end of the shielded wire bundles to the ground wire on the power plug side.

5. A cable, characterized in that, have: Conductors, covered by insulators; and At least two sets of shielded conductor bundles are bundles of multiple conductors that have undergone insulation coating treatment, and are respectively coiled on the outer peripheral surface of the conductor. The conductor is used as the shielding center line. Connect one end of the first set of shielded wire bundles to one end of the conductor, and connect one end of the second set of shielded wire bundles to the other end of the conductor.

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