Elastic coil component

Abstract

To provide a coil component having elasticity.SOLUTION: An elastic coil component according to an embodiment of the present disclosure includes a coil constructed from a toroidally wound metal wire.SELECTED DRAWING: Figure 1A

Description

[Technical Field]

[0001] The present disclosure relates to a stretchable coil component. [Background technology]

[0002] Conventionally, flexible coil components have been provided in some cases. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-115448 Summary of the Invention [Problem to be solved by the invention]

[0004] When a coil component is attached to a living body, stretchability in addition to flexibility may be required. Therefore, an object of the present disclosure is to provide a coil component having stretchability. [Means for solving the problem]

[0005] In order to achieve the above object, in one embodiment of the present disclosure, A stretchable coil component is provided, which comprises a coil constructed from a toroidally wound metal wire. [Effects of the Invention]

[0006] According to the stretchable coil component according to an embodiment of the present disclosure, it is possible to provide suitable stretchability. [Brief explanation of the drawings]

[0007] [Figure 1A] FIG. 1A is a perspective view schematically illustrating an expandable coil component according to a first embodiment of the present disclosure. [Figure 1B] FIG. 1B is a perspective view schematically illustrating an expandable coil component according to a second embodiment of the present disclosure. [Figure 2] FIG. 2 is a perspective view schematically illustrating an expandable coil component according to a third embodiment of the present disclosure. [Figure 3] FIG. 3 is a perspective view schematically illustrating an expandable coil component according to a fourth embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In each embodiment, differences from those previously described will be mainly described. In particular, similar effects resulting from similar configurations will not be mentioned in each embodiment. Among the components in the following embodiments, components not recited in independent claims will be described as optional components. Furthermore, the size and size ratios of components shown in the drawings are not necessarily strict. Furthermore, in each figure, substantially identical components are assigned the same reference numerals, and duplicated descriptions may be omitted or simplified.

[0009] [First embodiment] Hereinafter, the configuration of the expandable coil component according to the first embodiment will be described with reference to FIG. 1A.

[0010] FIG. 1A is a perspective view schematically illustrating an expandable coil component according to a first embodiment of the present disclosure.

[0011] The expandable coil device 10 according to the first embodiment is characterized in that it includes a coil 1 made of a metal wire wound in a toroidal direction. Note that the "toroidal direction" referred to in this specification can also be referred to as the circumferential direction.

[0012] In one example, as shown in Figure 1A, one metal wire 1X is wound in a toroidal direction. The metal wire 1X may be, for example, a copper wire. Although not shown, an insulating film may be provided to cover the surface of the metal wire 1X.

[0013] According to the above-mentioned features, the coil 1 can be made of a metal wire 1X wound spirally in the toroidal direction, and the spiral shape can provide elastic force in the toroidal direction to the coil 1. As a result, the coil component 10 including the coil 1 can function as a stretchable coil component.

[0014] A single wire or a Litz wire (a plurality of metal wire units twisted together) can be used as the metal wire 1X, which is a component of the coil 1. From the viewpoint of more suitably improving the flexibility and elasticity of the coil 1, the metal wire 1X is preferably a Litz wire.

[0015] When a current is passed through the coil component 10, a first magnetic field A circulating inside and outside the coil 1 provided in the toroidal direction, and a second magnetic field B circulating in the toroidal direction of the coil 1 are generated.

[0016] In this regard, as described above, in this embodiment, the coil device 10 can have stretchability, and therefore the following advantages can be provided.

[0017] Specifically, when the coil 1 of this coil device 10 stretches, the inductance L on the first magnetic field A side may increase, and the inductance L on the second magnetic field B side may decrease.

[0018] On the other hand, when the coil 1 of the coil device 10 contracts, the inductance L on the first magnetic field A side may decrease, and the inductance L on the second magnetic field B side may increase.

[0019] From the above, whether the coil 1 of the coil device 10 expands or contracts, if the inductance L in one of the first magnetic field A and the second magnetic field B increases, the inductance L in the other of the first magnetic field A and the second magnetic field B may decrease.

[0020] In this regard, the characteristic of the inductance L of the coil device 10 can be evaluated based on the sum of the inductance L value on the first magnetic field A side and the inductance L value on the second magnetic field B side.

[0021] Furthermore, considering that when the inductance L in one of the first magnetic field A and the second magnetic field B increases, the inductance L in the other decreases, it is possible to mitigate the change in the sum of the inductance L value on the first magnetic field A side and the inductance L value on the second magnetic field B side when the coil 1 expands or contracts.

[0022] As described above, according to the expandable coil component 10 of this embodiment, it is possible to reduce the change in the total value of the inductance L when the component is expanded and contracted, i.e., when the component is expanded or contracted. In other words, it is possible to reduce the change in the total value of the inductance L when the component is expanded or contracted.

[0023] By alleviating the change in the total value of L, when the stretchable coil component 10 of the present disclosure is used in combination with a capacitor, it may be possible to keep the resonance frequency approximately constant in a resonance circuit that utilizes energy transfer between the two.

[0024] In this embodiment, the first magnetic field A can be the main magnetic field, and the second magnetic field B can be the leakage magnetic field. Therefore, the magnetic force of the first magnetic field A can be suitably applied in the direction circulating inside and outside the coil 1 arranged in the toroidal direction. By utilizing this property, it is possible to take measures to suitably apply the magnetic force to a living body or the like located on the circulating side, for example.

[0025] As described above, when the coil 1 is formed by winding one metal wire 1X as shown in FIG. 1A, the stretchable coil component 10 including the coil 1 can function as a stretchable inductor.

[0026] When used as an inductor, a magnetic force can be generated by passing an electric current through it, and the degree of AC flow can be adjusted by the electromotive force generated by changing the magnetic field when an AC current is passed through it.

[0027] Furthermore, without being limited thereto, a mode may be adopted in which a plurality of metal wires, specifically a first metal wire and a second metal wire, are wound in the toroidal direction. That is, a first coil and a second coil may be provided in the toroidal direction. When two metal wires are wound, the stretchable coil component 10 including the two coils can function as a stretchable transformer.

[0028] The first coil functions as an input coil, and the second coil functions as an output coil. The first coil and the second coil can be magnetically coupled. Specifically, a magnetic flux generated by a current flowing through the first coil can be passed to the second coil. By adjusting the turn ratio between the first coil and the second coil, voltage conversion can be performed optimally.

[0029] The toroidally wound metal wire that constitutes the coil 1 can be formed by winding a continuous metal wire around a bobbin using a winding machine.

[0030] [Second embodiment] Hereinafter, the configuration of the expandable coil component according to the second embodiment will be described with reference to FIG. 1B.

[0031] FIG. 1B is a perspective view schematically illustrating an expandable coil component according to a second embodiment of the present disclosure.

[0032] The expandable coil device 10I according to the second embodiment differs from that according to the first embodiment in that it further includes a toroidal expandable member 2. Note that the term "toroidal shape" used in this specification can also be referred to as a ring shape.

[0033] 1B, the stretchable member 2 can be positioned in a space 1Y within the toroidally oriented coil 1. Specifically, the metal wire 1X that constitutes the coil 1 is wound around the toroidal stretchable member 2.

[0034] The provision of such an elastic member 2 not only provides elasticity due to the elasticity of the coil 1 itself, but also makes it possible to improve the degree of elasticity of the entire coil component 10I. Furthermore, the provision of the toroidal elastic member 2 suppresses deformation of the coil 1 compared to when the member 2 is not provided, making it easier to maintain the shape.

[0035] The stretchable member 2 may be, for example, a toroidal rubber member or a resin member, such as a urethane-based resin member.

[0036] [Third embodiment] Hereinafter, the configuration of the expandable coil component according to the third embodiment will be described with reference to FIG.

[0037] FIG. 2 is a perspective view schematically illustrating an expandable coil component according to a third embodiment of the present disclosure.

[0038] The expandable coil device 10II according to the third embodiment differs from that according to the second embodiment in that it further includes a magnetic core 3.

[0039] This magnetic core 3 has elasticity. The magnetic core 3 may be a resin member containing ferrite powder that can provide magnetic properties. In order to suitably provide elasticity to the magnetic core 3, it is preferable to use a urethane-based resin member as the resin member.

[0040] The magnetic core 3 can be arranged to pass through at least one of the inside and outside of the coil 1 arranged in the toroidal direction. The provision of the magnetic core 3 can increase the magnetic flux compared to when the core 3 is not present. In other words, the elastic magnetic core 3 can function as a magnetic force reinforcing member. This can increase the inductance L, thereby reducing the magnetic resistance.

[0041] When the magnetic core 3 is disposed outside the coil 1, it is preferable that the magnetic core 3 be disposed close to the outer periphery of the coil 1 so that the magnetic core 3 functions favorably as a magnetic force strengthening member.

[0042] Each embodiment and modification is an example, and the present disclosure is not limited to each embodiment and modification. Also, each drawing is an example of components and does not limit the shape. Furthermore, partial substitution or combination of the configurations shown in different embodiments and modifications is possible.

[0043] [Fourth embodiment] Hereinafter, the configuration of the expandable coil component according to the fourth embodiment will be described with reference to FIG.

[0044] FIG. 3 is a perspective view schematically illustrating an expandable coil component according to a fourth embodiment of the present disclosure.

[0045] The expandable coil device 10III according to the fourth embodiment is characterized in that it includes a coil 1III including a plurality of metal wires 1a to 1e arranged continuously and adjacent to each other, as compared with the first embodiment. Each of the metal wires 1a to 1e is wound spirally in a toroidal direction. In one example, as shown in the figure, the coil 1III may include two or more parallel units each including the plurality of metal wires 1a to 1e arranged continuously and adjacent to each other. Although not shown, an insulating film may be provided to cover the surface of each metal wire.

[0046] According to the above features, the coil 1III can include a plurality of metal wires arranged continuously and adjacent to each other, compared to the first embodiment, and therefore can more suitably provide elastic force to the coil 1III in the toroidal direction. As a result, the coil component 10III including the coil 1III can more suitably function as a stretchable coil component. Note that, from the viewpoint of improving the degree of stretchability of the coil component 10III as a whole, a toroidal stretchable member can be positioned in the space within the coil 1III arranged in the toroidal direction.

[0047] The expandable coil component of the present disclosure may have the following configurations. <1> An expandable coil component having a coil made of a metal wire wound in a toroidal direction. <2> The device further includes a toroidal elastic member, and the metal wire is wound around the toroidal elastic member. <1> The stretchable coil component according to claim 1. <3> The elastic member is a toroidal rubber member or a resin member. <2> The stretchable coil component according to claim 1. <4> The resin member is a urethane-based resin member. <3> The stretchable coil component according to claim 1. <5> When a current is passed through the coil, a first magnetic field circulating inside and outside the coil provided in the toroidal direction and a second magnetic field circulating in the toroidal direction are generated. <1> ~ <4> The stretchable coil part according to any one of the above. <6> The toroidal coil further includes a magnetic core passing through at least one of the inside and outside of the toroidal coil, and the magnetic core has elasticity. <1> ~ <5> The stretchable coil part according to any one of the above. <7> The magnetic core is a urethane resin member containing ferrite powder. <6> The stretchable coil component according to claim 1. <8> A stretchable inductor, <1> ~ <7> The stretchable coil part according to any one of the above. <9> a plurality of the coils are provided in the toroidal direction, and the plurality of coils can be magnetically coupled to each other; <1> ~ <7> The stretchable coil part according to any one of the above. <10> It is a flexible transformer, <9> The stretchable coil component according to claim 1. [Explanation of symbols]

[0048] 1, 1III coil 1X, 1a~1e metal wire 2 Toroidal elastic member 3 Magnetic Core 10, 10I, 10II, 10III Elastic coil parts A First magnetic field B Second magnetic field

Claims

1. An expandable coil component having a coil made of a metal wire wound in a toroidal direction.

2. The stretchable coil part according to claim 1, further comprising a toroidal stretchable member, the metal wire being wound around the toroidal stretchable member.

3. The expandable coil part according to claim 2 , wherein the expandable member is a toroidal rubber member or a toroidal resin member.

4. The expandable coil part according to claim 3 , wherein the resin member is a urethane-based resin member.

5. 2. The expandable coil component according to claim 1, wherein, when a current is passed through the coil, a first magnetic field circulating inside and outside the coil arranged in the toroidal direction and a second magnetic field circulating in the toroidal direction are generated.

6. The expandable coil component according to claim 1, further comprising a magnetic core passing through at least one of the inside and outside of the coil provided in the toroidal direction, the magnetic core having expandability.

7. The expandable coil component according to claim 6, wherein the magnetic core is a urethane-based resin member containing ferrite powder.

8. The stretchable coil component according to claim 1, which is a stretchable inductor.

9. The expandable coil component according to claim 1 , wherein a plurality of the coils are provided in the toroidal direction, and the plurality of coils are magnetically connectable to each other.

10. The stretchable coil component according to claim 9, which is a stretchable transformer.

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