Wire and coil components

Abstract

The conductor includes a conductor element (40). The conductor element (40) includes a conductor (20) made of carbon as a main component and extending in the longitudinal direction and an insulator (30) connected to the conductor (20) and extending in the longitudinal direction. The insulator (30) includes a core (32) made of a material more plastically deformable than the conductor (20) and a first adhesive (31) made of an insulating material, arranged on the core (32) and bonded to one side of the conductor (20).

Description

Technical Field

[0001] The present disclosure relates to a wire including a conductor made of carbon as a main component, and a coil member. Background Art

[0002] The conductive wire includes a conductor made of carbon nanotubes as a main component (e.g., JP 2008-108583 A). Specifically, the conductive wire is configured such that the conductor is arranged on a sheet made of polyethylene terephthalate (i.e., PET) or the like. The conductive wire is formed by spraying carbon nanotubes containing a binder and a dispersant onto the sheet through a nozzle. Summary of the invention

[0003] In recent years, guide wires improved in versatility have been desired.

[0004] An object of the present disclosure is to provide a wire and a coil member that are improved in versatility.

[0005] The wire includes a wire element. The wire element includes: a conductor made of carbon as a main component and extending in a longitudinal direction; and an insulator connected to the conductor and extending in the longitudinal direction. The insulator includes: a core made of a material more plastically deformable than the conductor; and a first adhesive made of an insulating material, arranged on one side of the core and connected to the conductor.

[0006] The insulator includes a core that is easily plastically deformed. Thus, the wire can maintain an arbitrary shape, thereby improving versatility.

[0007] The insulator includes a first adhesive, and the first adhesive is bonded to the conductor. Therefore, the conductor and the insulator can be formed integrally by being prepared separately and then bonded together. In this case, since the conductor does not necessarily contain an adhesive or a dispersant, the resistance of the conductor can be reduced. That is, a conductor with an optimal orientation or a conductor with a low resistance can be used according to the application. Therefore, versatility is further improved.

[0008] The coil member includes a plurality of winding parts adjacent to each other. The conductive wire is wound around the winding parts to form a plurality of coils, and a portion of the conductive wire serves as a connecting wire connecting adjacent coils among the plurality of coils.

[0009] The coil member may be formed of the above-mentioned conductive wire. In this case, the shape and quality of the conductive wire may be easily changed according to the application and shape of the member in which the coil member is disposed, thereby improving versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1is a perspective view of the wire in the first embodiment.

[0011] Figure 2 is a cross-sectional view of a wire in the second embodiment.

[0012] Figure 3 is a cross-sectional view of a wire in the third embodiment.

[0013] Figure 4 is a cross-sectional view of a wire in the fourth embodiment.

[0014] Figure 5 is a cross-sectional view of a wire in the fifth embodiment.

[0015] Figure 6 is a cross-sectional view of a wire in a comparative example with respect to the wire of the fifth embodiment.

[0016] Figure 7 is a perspective view of a wire in the sixth embodiment.

[0017] Figure 8 is along Figure 7 A cross-sectional view taken along line VIII-VIII in FIG.

[0018] Fig. 9 is a cross-sectional view of a wire in the seventh embodiment.

[0019] Fig.10 is a schematic diagram of a stator in which a conductor is disposed. DETAILED DESCRIPTION

[0020] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. In each embodiment described herein, the same or equivalent components are given the same reference numerals.

[0021] (First embodiment)

[0022] The first embodiment will be described with reference to the accompanying drawings. Figure 1 As shown, in this embodiment, the wire 10 includes a wire element 40. The wire element 40 has a conductor 20 and an insulator 30.

[0023] The conductor 20 is made of carbon as a main component, and is particularly made of carbon nanotubes in this embodiment. The conductor 20 extends in the longitudinal direction and has a cross section taken in the normal direction of the longitudinal direction, the cross section having at least one side. Figure 1, the left-right direction corresponds to the longitudinal direction. In this embodiment, the conductor 20 has a rectangular shape including long sides in a cross section. The carbon nanotubes forming the conductor 20 have, for example, an orientation degree of 80%, do not include a binder or a dispersant, and do not have an adhesive property. The conductor 20 is made by forming a carbon nanotube ribbon using a carbon nanotube dispersion containing chlorosulfonic acid as a dispersant, as disclosed in JP 2011-502925.

[0024] The insulator 30 is configured such that the first adhesive 31 , the core 32 , and the second adhesive 33 are stacked in this order. The insulator 30 extends in the longitudinal direction and has a rectangular shape including long sides in a cross section taken along a normal direction to the longitudinal direction, similar to the conductor 20 .

[0025] The first adhesive 31 and the second adhesive 33 may be made of an acrylic adhesive. The core 32 is made of a material that is more plastically deformable than the conductor 20, such as polyethylene terephthalate. This insulator 30 may be a double-sided tape manufactured by TERAOKA SEISAKUSHO CO., LTD. The double-sided tape includes polyethylene terephthalate used as the core 32.

[0026] The first adhesive 31 is bonded to the conductor 20 such that the longitudinal direction of the insulator 30 is parallel to the longitudinal direction of the conductor 20. That is, the insulator 30 is bonded to the conductor 20 by adhering the first adhesive 31 to the conductor 20.

[0027] When a direction perpendicular to both the longitudinal direction and the stacking direction in which the conductor 20 and the insulator 30 are stacked on each other is defined as a width direction, the insulator 30 has a length in the width direction that is longer than a length in the width direction of the conductor 20. The width direction is also referred to as a direction along the longitudinal sides of the conductor 20 and the insulator 30 in a cross section. In this embodiment, the first adhesive 31, the core 32, and the second adhesive 33 have the same width.

[0028] The insulator 30 is bonded to the conductor 20 so that both ends of the insulator 30 in the width direction protrude from the conductor 20. That is, both ends of the insulator 30 are not bonded to the conductor 20. Hereinafter, the portion of the insulator 30 protruding from the conductor 20 in the width direction is referred to as an ear portion 34. Each of the ear portions 34 has a length of, for example, 1 mm in the width direction, but the length of each ear portion 34 can be appropriately changed according to the thickness of the conductor 20 described later and the shape of the wire 10. The thickness of the conductor 20 is the length of the conductor 20 in the stacking direction of the conductor 20 and the insulator 30.

[0029] In the above, the configuration of the wire 10 in this embodiment is described. Hereinafter, various examples of the shape of the wire 10 will be described.

[0030] (First embodiment)

[0031] The wire 10 in the first embodiment will be described. In the first embodiment, Figure 1 A conductor element 40 shown in FIG. 1 is used as the conductor 10 .

[0032] (Second embodiment)

[0033] The wire 10 in the second embodiment will be described. Figure 2 As shown in FIG. 1 , the wire 10 is configured such that the wire element 40 is folded back along the longitudinal direction together with the conductor. As a result, the first portion of the conductor and the second portion of the conductor overlap each other, so that the first portion is in contact with the second portion. In addition, the ear portions 34 of the insulator 30 are engaged with each other, so that the conductor 20 of the wire 10 is covered by the ear portions 34. Thus, the length of the wire in the width direction can be reduced.

[0034] (Third Embodiment)

[0035] The wire 10 in the third embodiment will be described. Figure 3 As shown in FIG. 1 , the conductor element 40 is repeatedly folded back a plurality of times in the longitudinal direction to form a substantially spiral shape in cross section. Specifically, the conductor 10 is formed in the following manner, that is, the conductor 10 is formed by folding the conductor element 40 back so that one ear portion 34 of the conductor element 40 is interposed between the first portion of the conductor 20 and the second portion of the conductor 20 and the other ear portion 34 is bonded to the portion of the insulator 30 exposed to the outside. As a result, the conductor 20 is covered. Thus, the length of the conductor in the width direction can be reduced.

[0036] (Fourth embodiment)

[0037] The wire 10 in the fourth embodiment will be described. Figure 4 As shown, the wire 10 is formed by joining two wire elements 40 together. Specifically, the conductors 20 of the wire elements 40 are arranged to face each other and contact each other. In addition, the ears 34 of the two wire elements 40 facing each other are joined together. As a result, the conductors 20 are covered. In this embodiment, the wire 10 can increase the current path.

[0038] (Fifth Embodiment)

[0039] The wire 10 in the fifth embodiment will be described. Figure 5As shown, the conductor 10 is formed by stacking a plurality of conductor elements 40. Specifically, the conductor 20 of the lower one of the adjacent conductor elements 40 in the stacking direction engages the second adhesive 33 of the upper one of the adjacent conductor elements 40 in the stacking direction. The ear portion 34 of the upper one of the adjacent conductor elements 40 engages the ear portion 34 of the lower one of the adjacent conductor elements 40 to cover the side surface of the conductor 20 of the lower one. As a result, the conductor 20 is covered.

[0040] For a comparative example, Figure 6 As shown, the wire 10 includes a plurality of wire elements J40, each of which includes a conductor J20 and an insulator J30. The wire element J40 has a circular shape in a cross section in which the longitudinal direction is the normal direction. A plurality of wire elements J40 are arranged to construct the wire 10. In this case, when the wire 10 in the fifth embodiment has the same cross-sectional area as the wire J10, the area of ​​the insulator 30 arranged between the conductors 20 can be reduced in the fifth embodiment. As a result, Figure 6 The conductor 20 in the embodiment has a higher occupancy than the wire J10. Thus, a wire with high performance can be provided.

[0041] (Sixth Embodiment)

[0042] The wire 10 in the sixth embodiment will be described. Figure 7 and 8 As shown, the wire 10 is configured such that the wire element 40 is wound around an axis in a direction intersecting the longitudinal direction. That is, the wire 10 has a twisted thread shape. The wire 10 can reduce the length in the width direction.

[0043] (Seventh Embodiment)

[0044] The wire 10 in the seventh embodiment will be described. Fig. 9 As shown, in the wire 10 of the sixth embodiment, the wire 10 defines a hollow space 50. The wire 10 in the seventh embodiment is formed by winding the wire element 40 around a support having a rod shape (not shown) and then removing the support.

[0045] The hollow space 50 may be used as a passage through which a heat exchange medium such as gas and liquid for cooling flows. The seventh embodiment may be combined with the third embodiment, and the wire 10 in the third embodiment may define the hollow space 50 therein.

[0046] As described above, the wire 10 can be modified into various shapes. The wire 10 is appropriately changed based on the shape of the member in which the wire 10 is installed and the surrounding space. Thus, versatility is improved.

[0047] For example, in Fig.10, the conductor 10 is installed in the stator 60 to constitute a coil member. Specifically, the stator 60 includes a plurality of stator cores 61, and each stator core 61 includes a coil 62. Adjacent coils among the coils 62 of the stator core 61 are connected to each other with a connecting wire 63 as a crossover portion. In this embodiment, each of the stator cores 61 corresponds to a winding portion.

[0048] In this case, the coil 62 can be Figure 1 The first embodiment of the present invention is constructed by winding the wire 10 around the stator core 61. Specifically, the wire 10 is wound around the stator core 61 so that the second adhesive 33 faces the stator core 61, and the second adhesive 33 adheres to the stator core 61 or the wire 10 located between the second adhesive 33 and the stator core 61. The insulator 30 of the wire 10 includes the ear portion 34. Therefore, even if the wire 10 is slightly displaced while being wound around the stator core 61, the first portion of the conductor 20 is restrained from contacting and electrically connecting with the second portion of the conductor 20. Since the conductor 20 is exposed to the outside at the outermost side of the coil 62, an insulator may be provided to cover the conductor 20 if necessary.

[0049] The connecting line 63 can be configured so that Figure 7 and 8 The wire 10 of the sixth embodiment in the embodiment connects adjacent coils 62 in the coil 62. Therefore, the connecting wire 63 can reduce the space limitation in the width direction. That is, the connecting wire 63 can be positioned in a tiny space.

[0050] The coil 62 and the connecting wire 63 are formed of one wire 10 in this embodiment, but may be formed of a plurality of wires 10. The shape of the wire 10 provided in the stator 60 is merely an example, and may be other shapes described in other embodiments.

[0051] As described above, in this embodiment, the conductor 20 has one side, and the insulator 30 is disposed on the one side of the conductor 20, the insulator 30 including the core 32 and being more plastically deformable than the conductor 20. Therefore, the wire 10 can maintain an arbitrary shape, thereby improving versatility.

[0052] The insulator 30 includes a first adhesive 31, and the first adhesive 31 adheres to the conductor 20. The conductor 20 and the insulator 30 can be made into one member by being prepared separately and then joined together. Therefore, the conductor 20 does not have to contain an adhesive or a dispersant, and thus the resistance of the conductor 20 is reduced. That is, a conductor with an optimal orientation or a conductor with low resistance can be used according to the application. Therefore, versatility is further improved.

[0053] (Other embodiments)

[0054] The present disclosure is not limited to the above-described embodiments and may be appropriately modified.

[0055] In the first embodiment, the conductor 20 is not necessarily made of carbon nanotubes, and may be manufactured by molding crashed graphite into a sheet and orienting the sheet.

[0056] In the first embodiment, the insulator 30 may be bonded to the conductor 20 such that one end of the insulator 30 in the width direction protrudes from the conductor 20. That is, the other end of the insulator 30 in the width direction may be bonded to the conductor 20. The insulator 30 may have the same length as the conductor 20 in the width direction, and both ends of the insulator 30 in the width direction do not necessarily protrude from the conductor 20.

[0057] In the first embodiment, the first adhesive 31 and the second adhesive 33 may be made of a thermosetting adhesive. After forming the wire 10 or after setting the wire 10 in the stator core 61, etc., the first adhesive 31 and the second adhesive 33 may be heated and thermoset. Therefore, the shape of the wire 10 may be stabilized.

[0058] In the first embodiment, the wire 10 does not necessarily include the second adhesive 33. In this case, when the wire 10 is installed in a member, an adhesive member such as an adhesive may be provided between the wire 10 and the member.

[0059] The wire 10 in the fifth embodiment may define a gap therein, and thus autoclave treatment or resin impregnation may be performed to fill the gap. Similarly, in other embodiments, the gap in the wire 10 may be filled.

[0060] The guide wire 10 in the seventh embodiment may include a support member without removing the support member. In this case, the guide wire 10 may define a hollow space 50 therein by using a tubular member defining a hollow space as the support member.

Claims

1. A conductor, comprising: A conductor element (40), the conductor element (40) comprising: a conductor (20) made of carbon as a main component and extending in a longitudinal direction; and an insulator (30) connected to the conductor and extending along the longitudinal direction, wherein The insulator comprises: a core (32) made of a material that is more plastically deformable than the conductor; and a first adhesive (31) made of an insulating material, arranged on one side of the core and bonded to the conductor, wherein The insulator further comprises a second adhesive (33) made of an insulating material and arranged on the other side of the core opposite to the conductor, wherein A direction perpendicular to both the longitudinal direction and the stacking direction in which the conductor and the insulator are stacked on each other is defined as a width direction, and The insulator has a longer length in the width direction than the conductor so that both ends of the insulator in the width direction protrude from the conductor, and the first adhesive, the second adhesive and the core have the same length in the width direction.

2. The wire according to claim 1, wherein The wire element is folded back along the longitudinal direction together with the conductor, and The first portion of the conductor and the second portion of the conductor overlap each other such that the first portion is in contact with the second portion.

3. The wire according to claim 1, wherein The conductor element is repeatedly folded back a plurality of times along the longitudinal direction.

4. The wire according to claim 1, wherein The conductor element is two conductor elements, and The two wire elements are stacked on each other such that the conductors of each of the two wire elements are in contact with each other.

5. The wire according to claim 1, wherein The conductor element is a plurality of conductor elements, and The plurality of wire elements are stacked on each other in the same direction so that the insulator of an upper one of adjacent ones of the wire elements contacts the conductor of a lower one of adjacent ones of the wire elements.

6. The wire according to claim 1, wherein The wire element is wound around an axis along a direction intersecting the longitudinal direction.

7. The guide wire according to claim 6, wherein The wire element defines a hollow space (50) therein.

8. A coil component, comprising: a plurality of winding portions adjacent to each other; and The conductor element (40) according to any one of claims 1 to 7, wherein The conductive wire is wound around the plurality of winding portions to form a plurality of coils (62), and A portion of the conductive wire is used as a connecting wire (63) connecting adjacent coils among the plurality of coils.

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