JP6296264B1 - Coil body and power supply unit - Google Patents

Abstract

A coil body capable of enhancing a noise canceling function is provided. A coil body according to an aspect of the present invention includes a first coil and a second coil. The first coil has a first layer and a second layer connected to the first layer. The second coil has a third layer and a fourth layer that continues to the third layer. The third layer is disposed so as to be sandwiched between the first layer and the second layer. The second layer is disposed so as to be sandwiched between the third layer and the fourth layer. The first layer, the second layer, the third layer, and the fourth layer are connected to the first portion that circulates in the first direction in plan view, and is connected to the first portion, and is opposite to the first direction in plan view. And a second portion that circulates in the second direction. The material constituting the first coil and the material constituting the second coil are different from each other. [Selection] Figure 1

Description

  The present invention relates to a coil body and a power supply unit.

  Conventionally, a coil body described in JP-A-7-204275 (Patent Document 1) is known. The coil body described in Patent Document 1 is composed of a plurality of layers. In the coil body described in Patent Document 1, adjacent layers are connected to each other. In the coil body described in Patent Document 1, each of the plurality of layers has an 8-shaped shape in plan view. In other words, each of the plurality of layers has a first portion and a second portion continuous with the first portion. The first portion circulates along the first direction in plan view. The second portion circulates along the second direction in plan view. The second direction is opposite to the first direction.

JP-A-7-204275

Problems to be solved by the invention

  According to the coil body described in Patent Document 1, the induced magnetic field due to the current flowing through the first portion and the induced magnetic field due to the current flowing through the second portion are in opposite phases. That is, the induced magnetic field caused by the current flowing through the first portion and the induced magnetic field caused by the current flowing through the second portion cancel each other. Therefore, in principle, the coil body described in Patent Document 1 functions as a kind of noise canceller.

  However, according to the knowledge found by the present inventors, there is room for improvement in the function of the coil body described in Patent Document 1 as a noise canceller.

  The present invention has been made in view of such problems of the prior art. More specifically, the present invention provides a coil body and a power supply unit that can enhance a noise canceling function.

Means for solving the problem

  A coil body according to an aspect of the present invention includes a first coil and a second coil. The first coil has a first layer and a second layer connected to the first layer. The second coil has a third layer and a fourth layer that continues to the third layer. The third layer is disposed so as to be sandwiched between the first layer and the second layer. The second layer is disposed so as to be sandwiched between the third layer and the fourth layer. The first layer, the second layer, the third layer, and the fourth layer are connected to the first portion that circulates in the first direction in the plan view and the first portion, and are in the direction opposite to the first direction in the plan view. And a second portion that circulates in the second direction. The material constituting the first coil and the material constituting the second coil are different from each other.

  In the coil body, the first portion of the first layer and the first portion of the second layer overlap with the second portion of the third layer and the second portion of the fourth layer in plan view, and The second portion and the second portion of the second layer may overlap the first portion of the third layer and the first portion of the fourth layer in plan view.

  In the above coil body, the elastic modulus of the material constituting the first coil may be different from the elastic modulus of the material constituting the second coil.

  In the above coil body, the material constituting the first coil may be a magnetic body, and the material constituting the second coil may be a non-magnetic body.

  In the coil body, the material constituting the first coil may be iron, and the material constituting the second coil may be copper.

  The coil body may further include a core material. The first portion of the first layer and the first portion of the second layer may overlap the second portion of the third layer and the second portion of the fourth layer in plan view. The first portion of the first layer and the first portion of the second layer circulate around the core material in the first direction in plan view, and the second portion of the third layer and the second portion of the fourth layer are planar. In view, the periphery of the core material may circulate in the second direction.

  A power supply unit according to one embodiment of the present invention includes a first terminal connected to a power supply, a second terminal connected to an audio device, and the coil body electrically connected to the first terminal and the second terminal. With.

Effect of the invention

  According to the coil body and the power supply unit according to one aspect of the present invention, the noise canceling function can be enhanced.

It is a side view of the coil body 10 which concerns on 1st Embodiment. 3 is a top view of a first coil 1 and a second coil 2. FIG. It is a top view of the coil body 10 which concerns on 1st Embodiment. It is a schematic diagram of the apparatus structure used for the sensory test. It is a graph which shows a sensory test result. It is a side view of the coil body 20 which concerns on 2nd Embodiment. It is a top view of the coil body 20 which concerns on 2nd Embodiment. It is a schematic diagram of the power supply unit 100 which concerns on 3rd Embodiment.

  Details of the embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals. Moreover, you may combine arbitrarily at least one part of embodiment described below.

(First embodiment)
Below, the structure of the coil body 10 which concerns on 1st Embodiment is demonstrated.
FIG. 1 is a side view of a coil body 10 according to the first embodiment. As shown in FIG. 1, the coil body 10 according to the first embodiment includes a first coil 1 and a second coil 2.

  The material constituting the first coil 1 and the material constituting the second coil 2 are different from each other. The elastic modulus of the material constituting the first coil 1 may be different from the elastic modulus of the material constituting the second coil 2. The difference between the elastic modulus of the material composing the first coil 1 and the elastic modulus of the material composing the second coil 2 may be 100 GPa or more and 130 GPa or less. The material composing the first coil 1 may be a magnetic material, and the material composing the second coil 2 may be a non-magnetic material. The material used for the first coil 1 is, for example, iron (Fe). The material used for the second coil 2 is, for example, copper (Cu). The material used for the first coil 1 may be nickel (Ni). The material used for the second coil may be, for example, aluminum (Al).

  The first coil 1 has a first layer 11 and a second layer 12. The second layer 12 is continuous with the first layer 11. In addition, the 1st coil 1 may be comprised by more layers. The second coil 2 has a third layer 21 and a fourth layer 22. The fourth layer 22 is continuous with the third layer 21. In addition, the 2nd coil 2 may be comprised by more layers.

  The third layer 21 is disposed between the first layer 11 and the second layer 12. The second layer 12 is disposed between the third layer 21 and the fourth layer 22. That is, the layers constituting the first coil 1 and the layers constituting the second coil 2 are alternately arranged along the coil axis direction of the coil body 10.

  FIG. 2 is a top view of the first coil 1 and the second coil 2. As shown in FIG. 2A, the first layer 11 has an 8-shaped shape in plan view (as viewed from a direction parallel to the coil axis direction of the coil body 10). That is, the first layer 11 has a first portion 11a and a second portion 11b. The second portion 11b is continuous with the first portion 11a. The first portion 11a circulates in the first direction D1 in plan view. The second portion 11b circulates in the second direction D2 in plan view. The second direction D2 is opposite to the first direction D1. For example, when the first direction D1 is a counterclockwise direction, the second direction D2 is a clockwise direction.

  Although not shown in FIG. 2A, the second layer 12 has a first portion 12a and a second portion 12b. The first portion 12a is continuous with the second portion 11b. The second portion 12b is continuous with the first portion 12a. The first portion 12a circulates in the first direction D1 in plan view, and the second portion 12b circulates in the second direction D2 in plan view.

  As shown in FIG. 2B, the third layer 21 and the fourth layer 22 also have the same shape as the first layer 11 and the second layer 12 (having an 8-shaped shape in plan view). doing). That is, the third layer 21 includes a first portion 21a that circulates in the first direction D1 in plan view, and a second portion 21b that continues to the first portion 21a and circulates in the second direction D2 in plan view. The fourth layer 22 is connected to the second portion 21b and circulates in the first direction D1 in plan view, and the fourth layer 22 is connected to the first portion 22a and circulates in the second direction D2 in plan view. And a second portion 22b.

  FIG. 3 is a top view of the coil body 10 according to the first embodiment. In FIG. 3, in order to clarify the relationship between the first coil 1 and the second coil 2, the second coil 2 is illustrated as being shifted from the first coil 1, but the first coil 1 and the second coil 2 are illustrated. The coil 2 may be disposed so as to overlap each other. As shown in FIG. 3, the first coil 1 and the second coil 2 include a first portion 11a and a first portion 12a that overlap a second portion 21b and a second portion 22b, and a second portion 11b and a second portion. 12b may be arrange | positioned so that it may overlap with the 1st part 21a and the 1st part 22a.

Below, the effect of the coil body 10 which concerns on 1st Embodiment is demonstrated.
As described above, the first layer 11, the second layer 12, the third layer 21, and the fourth layer 22 include the first portion 11a, the first portion 12a, the first portion 21a, the first portion 22a, and the second portion 11b, It has the 2nd part 12b, the 2nd part 21b, and the 2nd part 22b. As described above, the circumferential direction (first direction D1) in plan view of the first portion 11a, the first portion 12a, the first portion 21a, and the first portion 22a is the second portion 11b, the second portion 12b, and the second portion. This is opposite to the circumferential direction (second direction D2) in plan view of 21b and the second portion 22b.

  Therefore, the induced magnetic field generated by the current flowing through the first portion 11a, the first portion 12a, the first portion 21a, and the first portion 22a flows through the second portion 11b, the second portion 12b, the second portion 21b, and the second portion 22b. They are in opposite phase to the induced magnetic field due to the current and cancel each other. If this is said from another viewpoint, the fluctuation | variation of an electric current will be suppressed when the said electric current passes the coil body 10 which concerns on 1st Embodiment. Thus, the coil body 10 according to the first embodiment functions as a noise canceller.

  The current flowing through the first coil 1 and the second coil 2 generates a Lorentz force on the first coil 1 and the second coil 2 itself. This Lorentz force causes vibration of the first coil 1 and the second coil 2. Such vibration causes noise to the surroundings. However, different materials are used for the first coil 1 and the second coil 2. Therefore, the first coil 1 and the second coil 2 vibrate at mutually different frequencies and cancel noises generated by the mutual vibrations. Therefore, according to the coil body 10 according to the first embodiment, the noise canceling effect can be enhanced.

  When the first portion 11a and the first portion 12a overlap with the second portion 21b and the second portion 22b, and the second portion 11b and the second portion 12b overlap with the first portion 21a and the first portion 22a, The induced magnetic field due to the current flowing through the first portion 11a and the first portion 12a is in opposite phase to the induced magnetic field due to the current flowing through the second portion 21b and the second portion 22b, and the current flowing through the second portion 11b and the second portion 12b. The magnetic fields induced by are out of phase with the magnetic fields induced by the current flowing through the first portion 21a and the first portion 22a and cancel each other. In this case, the induced magnetic field is more easily canceled out, and the magnetic neutrality inside the coil body 10 is easily increased, so that the noise canceling effect is further enhanced.

  Below, the test result performed in order to confirm the noise canceling effect of the coil body 10 which concerns on 1st Embodiment is demonstrated.

<Device configuration>
FIG. 4 is a schematic diagram of an apparatus configuration used for the sensory test. The apparatus used for the sensory test has a power tap 41, a power supply unit 42, a first CD radio cassette 43, and a second CD radio cassette 44. The power tap 41 is connected to a 100V power source. The first CD radio cassette 43 is directly connected to the power tap 41. The second CD radio cassette 44 is connected to the power tap 41 via the power unit 42. The power supply unit 42 has the coil body 10. The coil body 10 is connected to the terminal on the power tap 41 side and the second CD radio cassette 44 in the power supply unit 42.

<Test method>
As a sound source of the first CD radio cassette 43 and the second CD radio cassette 44, a CD on which “Symphony Suite Dragon Quest” was recorded was used. There were 7 subjects. The seven subjects consisted of three men and four women, and the age of these seven subjects was 34 to 76 years old. The subject concealed which CD radio cassette is connected to the power supply unit 42 in which the coil body 10 is built.

  In the sensory test, the first CD radio cassette 43 and the second CD radio cassette are reproduced after reproducing the CD once by the first CD radio cassette 43 and the second CD radio cassette 44 based on the SD (Semantic Differential) method. I asked them to fill out the questionnaire form to see which of the music from 44 is better. In this questionnaire, four items were evaluated on a 7-point scale: whether the music is clear, whether the music is clear, whether the music is smooth, and whether the music is broad (Note The highest score is 7 and the lowest score is 1.) The questionnaire included impressions, moods, and preferences when listening to music.

<Test results>
FIG. 5 is a graph showing sensory test results. As shown in FIG. 5, the average score of the sensory test by the subject who listened to the music reproduced by the first CD radio cassette 43 was less than 3 for any evaluation item. On the other hand, the evaluation score of the sensory test by the subject who listened to the music reproduced by the second CD radio cassette 44 exceeded 6 points for all items.

  Regarding the impression and mood when listening to music, all seven subjects who listened to the music played by the first CD radio cassette 43 stated that they felt nothing or felt bad. On the other hand, all the subjects who listened to the music played by the second CD radio cassette 44 stated that they were comfortable. Regarding the preference when listening to music, all seven subjects who listened to the music played by the first CD radio cassette 43 stated that it was not their favorite sound. On the other hand, all seven subjects who listened to the music played by the second CD radio cassette 44 stated that it was their favorite sound.

  From the above sensory test results, it has been experimentally clarified that the sound quality of the sound reproduced by the acoustic device is improved by the noise canceling effect of the coil body 10.

  From the above test results, it was experimentally confirmed that the noise canceling effect is enhanced by the coil body 10 according to the first embodiment.

(Second Embodiment)
Below, the structure of the coil body 20 which concerns on 2nd Embodiment is demonstrated. In the following, differences from the configuration of the coil body 10 according to the first embodiment will be mainly described.

  FIG. 6 is a side view of the coil body 20 according to the second embodiment. FIG. 7 is a top view of the coil body 20 according to the second embodiment. As shown in FIGS. 6 and 7, the coil body 20 according to the second embodiment includes a first coil 1 and a second coil 2.

  The first coil 1 has a first layer 11 and a second layer 12 connected to the first layer 11. The second coil 2 includes a third layer 21 and a fourth layer 22 that continues to the third layer 21. The third layer 21 is disposed so as to be sandwiched between the first layer 11 and the second layer 12. The second layer 12 is disposed so as to be sandwiched between the third layer 21 and the fourth layer 22.

  The first layer 11 includes a first portion 11a that circulates in the first direction D1 in plan view, and a second portion 11b that continues to the first portion 11a and circulates in the second direction D2 in plan view. The second layer 12 includes a first portion 12a that circulates in the first direction D1 in plan view, and a second portion 12b that continues to the first portion 12a and circulates in the second direction D2 in plan view.

  The third layer 21 includes a first portion 21a that circulates in the first direction D1 in plan view, and a second portion 21b that is continuous with the first portion 21a and circulates in the second direction D2 in plan view. The fourth layer 22 includes a first portion 22a that circulates in the first direction D1 in plan view, and a second portion 22b that continues to the first portion 12a and circulates in the second direction D2 in plan view.

  The material constituting the first coil 1 and the material constituting the second coil 2 are different from each other. Regarding these points, the coil body 20 according to the second embodiment is common to the coil body 10 according to the first embodiment.

  However, the coil body 20 according to the second embodiment is different from the coil body 10 according to the first embodiment in that the coil body 20 further includes the core material 3. Further, the coil body 20 according to the second embodiment is different from the coil body 10 according to the first embodiment in how the first coil 1 and the second coil 2 overlap each other.

  The core material 3 extends along the coil axis direction of the coil body 20 according to the second embodiment. The core material 3 has a columnar shape. The core material 3 preferably has a cylindrical shape.

  The first coil 1 and the second coil are arranged such that the first portion 11a and the first portion 12a overlap the second portion 21b and the second portion 22b. The core material 3 is inserted into the first portion 11a, the first portion 12a, the second portion 21b, and the second portion 22b. From another viewpoint, the first portion 11a and the first portion 12a circulate around the core member 3 in the first direction D1 in plan view, and the second portion 21b and the second portion 22b. Circulates around the core material 3 in the second direction D2 in plan view.

  The material used for the core material 3 is not particularly limited. The material used for the core material 3 may be a metal. The material used for the core material 3 may be a non-metal. The material used for the core material 3 may be a magnetic material. The material used for the core material 3 may be a non-magnetic material. The core material 3 may be an electric wire such as Cu, or may be an optical fiber line.

Below, the effect of the coil body 20 which concerns on 2nd Embodiment is demonstrated. In the following, differences from the effects of the coil body 10 according to the first embodiment will be mainly described.
In the coil body 20 according to the second embodiment, since the first portion 11a and the first portion 12a overlap the second portion 21b and the second portion 22b, magnetic neutrality is increased in the portion. The core material 3 is disposed so as to pass through such a magnetically neutral portion. Therefore, when an electrical signal, an optical signal, or the like is passed through the core material 3, the processing capability and response speed for these signals are improved. That is, according to the coil body 20 according to the second embodiment, the performance and characteristics of the core material 3 are improved.

The configuration of the power supply unit 100 according to the third embodiment will be described below.
FIG. 8 is a schematic diagram of the power supply unit 100 according to the third embodiment. As shown in FIG. 8, the power supply unit 100 according to the third embodiment includes a first terminal 100a and a second terminal 100b. The first terminal 100a is connected to the power source PW. The power source PW is, for example, an AC power source. The second terminal 100b is connected to the audio equipment AE. The acoustic device AE is, for example, an audio amplifier.

  The power supply unit 100 according to the third embodiment is, for example, an AC-AC converter. An electric circuit is disposed inside the power supply unit 100, but is not shown in FIG. The electric circuit disposed inside the power supply unit 100 may be a conventionally known one.

  The power supply unit 100 includes the coil body 10 according to the first embodiment or the coil body 20 according to the second embodiment. The coil body 10 (coil body 20) is electrically connected to the first terminal 100a and the second terminal 100b.

  The effects of the power supply unit 100 according to the third embodiment will be described below. As described above, the coil body 10 according to the first embodiment and the coil body 20 according to the second embodiment function as a noise canceller. Therefore, according to the power supply unit 100, it can suppress that the noise contained in the power supply PW is transmitted to the audio equipment AE.

  Although the embodiment of the present invention has been described above, the above-described embodiment can be variously modified. Further, the scope of the present invention is not limited to the above-described embodiment. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The coil body according to each embodiment is advantageously applied to, for example, a coil body incorporated in a power supply unit. The power supply unit according to the embodiment is advantageously applied to a power supply unit for audio equipment, for example.

  DESCRIPTION OF SYMBOLS 1 1st coil, 2nd coil, 3 core material, 11 1st layer, 12 2nd layer, 21 3rd layer, 22 4th layer, 11a, 12a, 21a, 22a 1st part, 11b, 12b, 21b 22b second part 10, 20, 30 coil body, 41 power tap, 42 power supply unit, 43 first CD radio cassette, 43 second CD radio cassette, 100 power supply unit, 100a first terminal, 100b second terminal, AE acoustic equipment, D1 first direction, D2 second direction, PW power supply.

Claims (6)

A first coil;
A second coil,
The first coil has a first layer and a second layer that continues to the first layer,
The second coil has a third layer and a fourth layer connected to the third layer,
The third layer is disposed so as to be sandwiched between the first layer and the second layer,
The second layer is disposed so as to be sandwiched between the third layer and the fourth layer,
The first layer, the second layer, the third layer, and the fourth layer are continuous with the first portion in a first direction in a plan view and the first direction in the plan view. And a second portion that circulates in a second direction that is the opposite direction,
The material constituting the material and the second coil constituting the first coil, unlike one another,
The material constituting the first coil is a magnetic body,
The material which comprises the said 2nd coil is a coil body which is a nonmagnetic body. A first coil;
A second coil,
The first coil has a first layer and a second layer that continues to the first layer,
The second coil has a third layer and a fourth layer connected to the third layer,
The third layer is disposed so as to be sandwiched between the first layer and the second layer,
The second layer is disposed so as to be sandwiched between the third layer and the fourth layer,
The first layer, the second layer, the third layer, and the fourth layer are continuous with the first portion in a first direction in a plan view and the first direction in the plan view. And a second portion that circulates in a second direction that is the opposite direction,
The material constituting the first coil and the material constituting the second coil are different from each other,
The material constituting the first coil is iron,
The material which comprises the said 2nd coil is a coil body which is copper. The first portion of the first layer and the first portion of the second layer overlap with the second portion of the third layer and the second portion of the fourth layer in plan view,
The second portion of the first layer and the second portion of the second layer overlap with the first portion of the third layer and the first portion of the fourth layer in plan view. Or the coil body of Claim 2 . The coil body according to claim 1 or 2, wherein an elastic modulus of a material constituting the first coil is different from an elastic modulus of a material constituting the second coil. A core material,
The first portion of the first layer and the first portion of the second layer overlap with the second portion of the third layer and the second portion of the fourth layer in plan view,
The first portion of the first layer and the first portion of the second layer circulate around the core material in the first direction in plan view,
The coil body according to claim 1 or 2, wherein the second portion of the third layer and the second portion of the fourth layer circulate around the core member in the second direction in plan view. . A first terminal connected to a power source;
A second terminal connected to the audio device;
A power supply unit provided with the said coil body of any one of Claims 1-5 electrically connected to a said 1st terminal and a said 2nd terminal.

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