JP2019016621A - Coil component core and coil component - Google Patents

Abstract

To provide a core for a coil component that is easy to mold core pieces such that the core pieces have homogeneous and good structural stability, and has good direct current superposition characteristics.SOLUTION: A coil component core 100 includes a plurality of core pieces, each of the core pieces includes a first plate core 10 and a second plate core 20 arranged to face each other, a middle core 30 disposed between the first plate core 10 and the second plate core 20 facing each other, and a ring core 40 disposed between the first plate core 10 and the second plate core 20 facing each other and through which the middle core 30 is inserted, and a nonmagnetic gap 50 is formed between core pieces arranged adjacent to each other among the plurality of core pieces.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a coil component core and a coil component.

  Various coil parts having a core and a coil have been proposed. As such a coil component, there is a pot core type coil component including a pot core and a rivet core each made of a ferrite material (see Patent Document 1).

JP 2003-173914 A

  However, the pot core of the pot core type coil component is difficult to form the rivet core uniformly, particularly when the center of the rivet core is long in the axial direction, and the rivet core is likely to be cracked or chipped. Furthermore, it is difficult to obtain good DC superposition characteristics with pot core type coil components.

  The present invention has been made in view of the above problems, and it is easy for a coil component core to be molded so as to have a uniform and good structural stability, and for a coil component with good direct current superposition characteristics. A core and a coil component are provided.

According to the present invention, a coil component core comprising a plurality of core pieces,
The plurality of core pieces include
A first plate core and a second plate core disposed opposite to each other;
A core core disposed at a facing interval between the first plate core and the second plate core;
A ring core that is disposed at a facing interval between the first plate core and the second plate core, and through which the core core is inserted;
Contains
A coil component core is provided in which a nonmagnetic gap is formed between core pieces disposed adjacent to each other among the plurality of core pieces.

  Moreover, according to this invention, a coil component provided with the core for coil components of this invention and the coil by which the said core of the said core for coil components is penetrated is provided.

  According to the present invention, it is easy to form each core piece of the coil component core so as to have a uniform and good structural stability, and the DC component superimposition characteristic of the coil component core is also improved.

It is a disassembled perspective view of the coil component core which concerns on 1st Embodiment. It is a longitudinal cross-sectional view of the coil component core which concerns on 1st Embodiment. It is a disassembled perspective view of the coil component which concerns on 1st Embodiment. It is a longitudinal cross-sectional view of the coil component which concerns on 1st Embodiment. It is a top view of the coil component which concerns on 1st Embodiment, and has shown typically the magnetic path formed in a coil component. It is a disassembled perspective view of the coil component core which concerns on 2nd Embodiment. It is a longitudinal cross-sectional view of the coil component core which concerns on 2nd Embodiment. It is a disassembled perspective view of the coil components which concern on 2nd Embodiment. It is a longitudinal cross-sectional view of the coil component which concerns on 2nd Embodiment. It is a disassembled perspective view of the coil component core which concerns on 3rd Embodiment. It is a longitudinal cross-sectional view of the coil component which concerns on 3rd Embodiment. It is a longitudinal cross-sectional view of the coil component which concerns on 4th Embodiment. It is a longitudinal cross-sectional view of the coil component which concerns on 5th Embodiment. It is a disassembled perspective view of the coil component core which concerns on 6th Embodiment. It is a disassembled perspective view of the coil components which concern on 6th Embodiment. It is a longitudinal cross-sectional view of the coil component which concerns on 7th Embodiment. It is a figure which shows the characteristic of the coil components which concern on an Example and a comparative example. It is a graph which shows the characteristic of the coil components which concern on an Example and a comparative example.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same components are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

[First Embodiment]
First, the first embodiment will be described with reference to FIGS.
FIG. 2 is a cross-sectional view of the coil component core 100 along the axis of the core core 30 (the first core core 31 and the second core core 32).
In the configuration of the coil component 200, the second plate core 20, the first spacer 61, and the second spacer 62 are shown separated from the other parts in the coil component 200 in FIG. 3.
FIG. 4 is a cross-sectional view of the coil component 200 along the axis of the core core 30 (the first core core 31 and the second core core 32).

As shown in FIGS. 1 and 2, the coil component core 100 according to this embodiment includes a plurality of core pieces.
The plurality of core pieces include a first plate core 10 and a second plate core 20 that are arranged to face each other, and a middle core that is arranged at a facing interval between the first plate core 10 and the second plate core 20. A core 30 and a ring core 40 that is disposed at an opposing interval between the first plate core 10 and the second plate core 20 and through which the middle core 30 is inserted, and is adjacent to each other among the plurality of core pieces. A nonmagnetic gap 50 is formed between each of the core pieces arranged in the same manner.
That is, as shown in FIG. 2, between the first plate core 10 and the core core 30 (between the first plate core 10 and the first core core 31), the second plate core 20 and the core core 30. (Between the first plate core 10 and the second core core 32), between the first plate core 10 and the ring core 40 (between the first plate core 10 and the first ring core 41), and A nonmagnetic gap 50 is formed between the second plate core 20 and the ring core 40 (between the second plate core 20 and the second ring core 42).

According to the coil component core 100 having such a configuration, since the shape of each core piece constituting the coil component core 100 can be a simple shape such as a plate shape, an annular shape, or a column shape, the core pieces are homogeneous. Furthermore, it is easy to mold so as to have good structural stability. Moreover, since it becomes easy to compression-mold each core piece with a high pressure, the relative magnetic permeability of each core piece can be made high enough.
Moreover, since it becomes the structure which has the nonmagnetic gap 50 distribute | arranged and arrange | positioned in multiple places of the coil component core 100, the direct current superimposition characteristic of the coil component core 100 also becomes favorable.

Each of the first plate core 10 and the second plate core 20 is formed in a flat plate shape, for example. In the first plate core 10, protrusions may be formed on portions of the surface facing the second plate core 20 excluding the portion facing the core core 30. Similarly, protrusions may be formed on portions of the second plate core 20 other than the portion facing the core core 30 in the surface facing the first plate core 10. Although the planar shape of the 1st plate core 10 and the 2nd plate core 20 is not specifically limited, For example, it is rectangular shapes, such as square shape (refer FIG. 5).
For example, the thickness dimension of the first plate core 10 and the thickness dimension of the second plate core 20 are equal to each other. However, the thickness dimension of the first plate core 10 and the thickness dimension of the second plate core 20 may be different from each other.

In the case of this embodiment, the coil component core 100 includes a plurality of ring cores 40 (for example, two ring cores 40, that is, a first ring core 41 and a second ring core 42) that are stacked on each other. A nonmagnetic gap 50 is formed between the ring cores 40. That is, a nonmagnetic gap 50 is also formed between the first ring core 41 and the second ring core 42.
Thereby, the further improvement of the direct current | flow superimposition characteristic of the core 100 for coil components can be anticipated.

Each of the first ring core 41 and the second ring core 42 is formed in a flat plate shape, and is formed in an annular planar shape by forming openings 41a and 42a at the center in plan view. The external shapes of the first ring core 41 and the second ring core 42 in plan view are, for example, the same shape as the planar shapes of the first plate core 10 and the second plate core 20. Each opening 41a, 42a is formed in a circular shape, for example. More specifically, the diameter of the opening 41a and the diameter of the opening 42a are equal to each other.
For example, the thickness dimension of the first ring core 41 and the thickness dimension of the second ring core 42 are equal to each other. For example, the thickness dimension of the first ring core 41 and the second ring core 42 is equal to the thickness dimension of the first plate core 10 and the second plate core 20.
However, the thickness dimension of the first ring core 41 and the thickness dimension of the second ring core 42 may be different from each other. Further, the thickness dimension of the first ring core 41 and the second ring core 42 and the thickness dimension of the first plate core 10 and the second plate core 20 may be different from each other.

  In the case of the present embodiment, the first lead wiring portion 72 and the second lead wiring portion 73 of the wire 71 constituting the coil 70 which will be described later are respectively exposed to the surface of the second ring core 42 facing the second plate core 20. A pair of wire drawing grooves 43 (FIGS. 1 and 3) for drawing out are formed. The pair of wire drawing grooves 43 extend in opposite directions with respect to the opening 42a. Both ends of each wire lead groove 43 are open to the internal space of the opening 42a and the space on the side of the second ring core 42, respectively.

  In the present embodiment, an example in which the coil component core 100 includes two ring cores 40 will be described. However, the present invention is not limited to this example, and the coil component cores 100 are stacked and arranged 3. Two or more ring cores 40 may be provided, and a nonmagnetic gap 50 may be formed between each adjacent ring cores 40.

  In the case of the present embodiment, the coil component core 100 includes a plurality of core cores 30 (for example, two core cores of a first core core 31 and a second core core 32) that are arranged coaxially with each other. 30). A nonmagnetic gap 50 is also formed between the plurality of cores 30. That is, the nonmagnetic gap 50 is also formed between the first core core 31 and the second core core 32.

  Each of the first core core 31 and the second core core 32 is formed in a columnar shape (in the case of this embodiment, a columnar shape). Each of both end faces of the first core core 31 is formed in a planar shape perpendicular to the axis of the first core core 31. Similarly, each of both end faces of the second core core 32 is formed in a planar shape orthogonal to the axis of the second core core 32. For example, the first core core 31 and the second core core 32 are formed to have the same diameter, and the outline of the first core core 31 and the outline of the second core core 32 are in plan view. Are consistent with each other.

  In the present embodiment, an example in which the coil component core 100 includes two cores 30 will be described. However, the present invention is not limited to this example, and the coil component cores 100 are coaxially arranged. The three or more core cores 30 may be provided, and the nonmagnetic gap 50 may be formed between each of the adjacent core cores 30.

As shown in FIG. 2, the dimension of the core core 30 and the dimension of the ring core 40 in the axial direction (vertical direction in FIG. 2) of the core core 30 are equal to each other.
That is, in the axial direction of the core core 30, the first core core 31 and the first ring core 41 have the same dimensions, and the second core core 32 and the second ring core 42 have the same dimensions. equal.

More specifically, one end surface of the first core core 31 in the axial direction of the first core core 31 and one surface of the first ring core 41 are arranged on the same plane, and the core core The other end face of the first core core 31 in the axial direction of 30 and the other face of the first ring core 41 are arranged on the same plane.
Similarly, one end surface of the second core core 32 in the axial direction of the second core core 32 and one surface of the second ring core 42 are arranged on the same plane, and the second core core The other end surface of the second core core 32 in the axial direction of 32 and the other surface of the second ring core 42 are arranged on the same plane.

The first plate core 10, the second plate core 20, each core core 30 (first core core 31 and second core core 32), and each ring core 40 (first ring core 41 and second ring core 42) are, for example, The metallic magnetic powder material is included.
That is, each of the plurality of core pieces included in the coil component core 100 is, for example, a dust core configured to include a metal magnetic powder material. The material of each core piece is, for example, a mixture of pure iron magnetic powder, metal magnetic powder containing iron as a main component and added with chromium, silicon, manganese, etc., and a binder such as epoxy resin, silicon resin, water glass, etc. It is manufactured by adding a solvent (such as terpineol) as necessary, followed by pressure molding, and then thermosetting or baking at a high temperature. In addition, when a large eddy current is generated when an AC magnetic field is applied to the core material, the high frequency characteristics deteriorate. Therefore, in order to function as an inductor at a frequency of 1 MHz or more, the volume resistivity of the core material is 1 × 10 ³ Ω · m or more is desirable.
However, the present invention is not limited to this example, and each of the plurality of core pieces included in the coil component core 100 may be a ferrite core made of a ferrite material.

  The relative permeability of each of the plurality of core pieces included in the coil component core 100 is preferably 40 or more, more preferably 45 or more, and even more preferably 55 or more.

On the other hand, the saturation magnetic flux density of each of the plurality of core pieces included in the coil component core 100 is preferably 600 mT or more. By doing so, good direct current superposition characteristics can be obtained. The saturation magnetic flux density of each of the plurality of core pieces is more preferably 800 mT or more, and even more preferably 1000 mT or more.
Each of the plurality of core pieces is preferably a dust core rather than a ferrite core.

  Each nonmagnetic gap 50 includes a first spacer 61, a second spacer 62, a third spacer 63, and a fourth spacer 64 interposed between the core pieces, as will be described below. .

First, at least one of the space between the first plate core 10 and the ring core 40 (first ring core 41) and the space between the second plate core 20 and the ring core 40 (second ring core 42) is made of a nonmagnetic material. The first spacer 61 that constitutes the nonmagnetic gap 50 is interposed.
In the case of the present embodiment, the first spacer 61 is provided between the first plate core 10 and the ring core 40 (first ring core 41) and between the second plate core 20 and the ring core 40 (second ring core 42). It is intervened. The first spacer 61 is formed in a flat sheet shape, for example.
The planar shape of the first spacer 61 is the same as the planar shape of the ring core 40 (the first ring core 41 and the second ring core 42), for example.

Further, at least one of the first plate core 10 and the core core 30 and between the second plate core 20 and the core core 30 is made of a nonmagnetic material and has a nonmagnetic gap 50. The 2nd spacer 62 to comprise is interposed.
In the case of the present embodiment, between the first plate core 10 and the core core 30 (first core core 31), and between the second plate core 20 and the core core 30 (second core core 32). In addition, a second spacer 62 is interposed. The second spacer 62 is formed in a flat sheet shape, for example.
The planar shape of the second spacer 62 is, for example, the same as the planar shape of the core core 30 (the first core core 31 and the second core core 32).

Furthermore, in the present embodiment, one first spacer 61 and one second spacer 62 are arranged on the same plane.
That is, as shown in FIG. 2, the first spacer 61 between the first plate core 10 and the first ring core 41, and the second spacer 62 between the first plate core 10 and the first core core 31, Are arranged on the same plane. The first spacer 61 between the second plate core 20 and the second ring core 42 and the second spacer 62 between the second plate core 20 and the second core core 32 are arranged on the same plane. ing.
The thickness dimension of the first spacer 61 and the thickness dimension of the second spacer 62 are set to be equal to each other.

A third spacer 63 made of a nonmagnetic material is interposed between the first ring core 41 and the second ring core 42, and the first ring core 41 and the second ring core are interposed by the third spacer 63. A non-magnetic gap 50 between them is formed.
The planar shape of the third spacer 63 is, for example, the same as the planar shape of the ring core 40 (the first ring core 41 and the second ring core 42).
In addition, a fourth spacer 64 made of a nonmagnetic material is interposed between the first core core 31 and the second core core 32, and the first core core is configured by the fourth spacer 64. A nonmagnetic gap 50 is formed between the core 31 and the second core core 32.
The planar shape of the fourth spacer 64 is the same as the planar shape of the core core 30 (the first core core 31 and the second core core 32), for example.

  The first spacer 61, the second spacer 62, the third spacer 63, and the fourth spacer 64 may be adhesives such as an adhesive or a double-sided tape, respectively. Alternatively, a double-sided tape coated with a thermosetting adhesive resin may be used. Further, when a holding means such as a clip is attached separately, a nonmagnetic material that does not have adhesiveness may be used.

  When the coil component core 100 is viewed in plan, for example, the outlines of the second plate core 20, the second ring core 42, the first ring core 41, the first plate core 10, the first spacers 61, and the third spacers 63 are mutually connected. The inner circumference of the opening 42a of the second ring core 42, the inner circumference of the opening 41a of the first ring core 41, the inner circumference of each first spacer 61, and the inner circumference of the third spacer 63 match each other, and the second core The outlines of the core 32, the first core core 31, the second spacers 62, and the fourth spacers 64 coincide with each other.

  As shown in FIGS. 3 and 4, the coil component 200 according to the present embodiment includes a coil component core 100 according to the present embodiment, and a coil 70 into which the core core 30 of the coil component core 100 is inserted. , And is configured.

  The coil 70 includes a winding portion formed by winding the wire 71 in a spiral shape, and the core core 30 is inserted through the winding portion. That is, the winding part of the coil 70 is an opposing space between the first plate core 10 and the second plate core 20, and the outer periphery of the core core 30 (the first core core 31 and the second core core 32). It is accommodated in the space between the surface and the inner peripheral surface of the ring core 40 (the first ring core 41 and the second ring core 42).

Further, the coil 70 includes a pair of lead wiring portions (a first lead wiring portion 72 and a second lead wiring portion 73) drawn from the winding portion. As shown in FIG. 3, the first lead-out wiring portion 72 and the second lead-out wiring portion 73 are connected to the coil component core 100 via one of a pair of wire lead-out grooves 43 formed in the second ring core 42. Has been pulled out.
The first lead-out wiring portion 72 and the second lead-out wiring portion 73 are disposed outside the coil component core 100 and the portion of the first lead-out wiring portion 72 and the second lead-out wiring portion 73 that are disposed in the wire lead-out groove 43. It is bent at the boundary with the drawn out part. The portions of the first lead-out wiring portion 72 and the second lead-out wiring portion 73 that are led out of the coil component core 100 extend along the side surface of the coil component core 100 (for example, the axis of the core core 30). (Extends parallel to the direction of the heart).

As shown in FIGS. 3 and 4, the coil component 200 includes a pair of electrodes (a first electrode 74 and a second electrode 75) provided from the bottom surface to the side surface of the coil component core 100.
The first electrode 74 covers the end portion of the first lead wiring portion 72 from the side of the coil component core 100, thereby making contact with the end portion and being electrically connected to the first lead wiring portion 72. .
Similarly, the second electrode 75 covers the end portion of the second lead wiring portion 73 from the side of the coil component core 100, thereby coming into contact with the end portion and being electrically connected to the second lead wiring portion 73. Has been.
The first electrode 74 and the second electrode 75 are provided by bending a metal plate into an L-shaped cross section and bonding the metal plate from the side surface to the bottom surface of the coil component core 100.
In addition, the first electrode 74 and the first lead wiring part 72, and the second electrode 75 and the second lead wiring part 73 are soldered.
The width of the first electrode 74 and the second electrode 75 (the dimension in the depth direction on the paper surface of FIG. 4) is larger than the outer diameter of the wire 71.

  Here, in the 1st electrode 74 and the 2nd electrode 75, the part arrange | positioned at the side surface of the coil component 200 exists only on the side surface of the 2nd plate core 20, and the 2nd plate core 20 and the 1st ring core 41 is arranged so as not to cover the nonmagnetic gap 50 between them. In other words, the height dimension (height dimension from the bottom surface of the coil component 200) of the portion disposed on the side surface of the coil component 200 in the first electrode 74 and the second electrode 75 is the thickness of the second plate core 20. It is set below the dimension, preferably less than the thickness dimension of the second plate core 20.

That is, one end portion (first lead wiring portion 72) and the other end portion (second lead wiring portion 73) of the coil 70 are individually provided on the side surface of the coil component 200 through the plurality of core pieces. The coil component 200 is drawn from the bottom surface of the coil component 200 and is disposed from the bottom surface to the side surface, and is electrically connected to one end of the coil 70 and the bottom surface of the coil component 200. A second electrode 75 disposed on the side surface and electrically connected to the other end of the coil 70, and disposed on the side surface of the coil component 200 in the first electrode 74 and the second electrode 75. The part which is present terminates on the side surface of the second plate core 20.
With such a configuration, the eddy current loss of the coil component 200 can be reduced.

Here, the magnetic path 80 of the coil component 200 will be described with reference to FIGS. 4 and 5.
As shown in FIG. 4, the magnetic path 80 includes an axial center of the core core 30 and an outer peripheral surface of the core core 30 in the core core 30 (the first core core 31 and the second core core 32). And extend parallel to the axis of the core 30.
As shown in FIGS. 4 and 5, the magnetic path 80 extends radially in the first plate core 10 at an intermediate position in the thickness direction of the first plate core 10.
As shown in FIG. 4, in the ring core 40 (the first ring core 41 and the second ring core 42), the magnetic path 80 includes an inner peripheral surface of the ring core 40 (an inner peripheral surface of the opening 41a and the opening 42a), an outer peripheral surface, At an intermediate position extending in parallel with the axis of the core 30.

For this reason, the magnetic path length of the magnetic path 80 formed in the coil component 200 can be approximately expressed as follows. In addition, in order to distinguish the magnetic path length of the magnetic path 80 formed in the coil component 200, that is, the loop length of the magnetic path 80, from the length of the magnetic path passing through each core piece, hereinafter, the “total magnetic path length” will be described. May be called.
The thickness dimension of the first plate core 10 is a, the thickness dimension of the second plate core 20 is b, the thickness dimension of the first core core 31 (dimension in the axial direction) and the thickness dimension of the first ring core 41 are c, The thickness dimension of the second core core 32 (dimension in the axial direction) and the thickness dimension of the second ring core 42 are d, and the first spacer between the first plate core 10 and the first core core 31 and the first ring core 41. 61, the thickness dimension of the second spacer 62 is e, the thickness dimension of the first spacer 61 and the second spacer 62 between the second plate core 20, the second core core 32, and the second ring core 42 is f, the third dimension. The thickness dimension of the spacer 63 and the fourth spacer 64 is g, the outer diameter of the first core core 31 and the second core core 32 is 4 h, the length of one side of the first plate core 10 and the second plate core 20 in plan view. 4i, the first ring core 41 and the second ring core When the 42 inner diameter of the opening 41a and the opening 42a of the 4j, the total magnetic path length is {a + b + 2c + 2d + 2e + 2f + 2g + 2 (i + j-h)}.

  Here, it is preferable that all of the magnetic path lengths of the plurality of core pieces out of the total magnetic path length of the coil component 200 are 25% or less of the total magnetic path length. By doing in this way, the direct current superimposition characteristic of the coil component 200 can be made more favorable.

  Here, the magnetic path length passing through the first plate core 10 is approximately {a + (i + j−h)}, and the magnetic path length passing through the second plate core 20 is approximately {b + (i + j−h)]. }, The magnetic path length passing through the first core core 31 is approximately c, the magnetic path length passing through the second core core 32 is approximately d, and the magnetic path passing through the first ring core 41 The length is approximately c, and the magnetic path length passing through the second ring core 42 is approximately d.

  Moreover, it is more preferable that the magnetic path length passing through the individual core pieces of the plurality of core pieces out of the total magnetic path length of the coil component 200 is 20% or less of the total magnetic path length. By doing in this way, the direct current superimposition characteristic of the coil component 200 can be made still better.

In the present invention, it is preferable that six or more nonmagnetic gaps 50 are formed in the magnetic path 80 of the coil component 200, and it is also preferable that eight or more nonmagnetic gaps 50 are formed.
In the case of the present embodiment, as shown in FIG. 4, a series of magnetic paths 80 include a nonmagnetic gap 50 between the first plate core 10 and the first core core 31, and the first core core 31. A non-magnetic gap 50 between the second core core 32, a non-magnetic gap 50 between the second core core 32 and the second plate core 20, the second plate core 20 and the second ring core 42. And the nonmagnetic gap 50 between the second ring core 42 and the first ring core 41, and the nonmagnetic gap 50 between the first ring core 41 and the first plate core 10. Six nonmagnetic gaps 50 are formed in this order.

  According to the first embodiment as described above, since simple core pieces can be individually formed, it is possible to suppress the occurrence of problems during compression molding of each core piece. For this reason, it is easy to form each core piece of the coil component core 100 so as to have a uniform and good structural stability. Further, since each core piece can be compression-molded at a high pressure, a core piece using a material having a high relative permeability can be obtained. And since the nonmagnetic gap 50 is formed between the core pieces arranged adjacent to each other among the plurality of core pieces, the DC superposition characteristics of the coil component core 100 are also good.

  Moreover, since the 1st plate core 10 and the 2nd plate core 20 are simple flat plate shape, the manufacturing cost of the core 100 for coil components can be reduced.

  Further, when the nonmagnetic gap 50 is formed by sandwiching a nonmagnetic sheet between core pieces, the gap amount (gap interval) of the nonmagnetic gap 50 can be accurately controlled. The inductance value of the component core 100 can be stabilized.

[Second Embodiment]
Next, a second embodiment will be described with reference to FIGS.
FIG. 7 is a cross-sectional view of the coil component core 100 along the axial center of the core 30.
In FIG. 8, the second plate core 20, the first spacer 61, and the second spacer 62 in the configuration of the coil component 200 are shown separated from the other parts in the coil component 200.
FIG. 9 is a cross-sectional view of the coil component 200 along the axis of the core core 30.

  The coil component core 100 and the coil component 200 according to the present embodiment are different from the coil component core 100 and the coil component 200 according to the first embodiment described above in other points. The coil component core 100 and the coil component 200 according to the first embodiment are configured in the same manner.

  As shown in FIGS. 6 to 8, in the present embodiment, the coil component core 100 and the coil component 200 include a single core core 30 and a single ring core 40. Therefore, the fourth spacer 64 and the third spacer 63 (both see FIG. 2) are not provided. A circular opening 40a is formed in the ring core 40, and the core core 30 is disposed in the opening 40a. As shown in FIG. 8, the core 30 is inserted through the winding part of the coil 70. The dimension of the core core 30 in the axial direction of the core core 30 is equal to the thickness dimension of the ring core 40. As shown in FIGS. 6 and 8, the wire lead-out groove 43 is formed on the upper surface of the ring core 40.

  According to the present embodiment, in the first embodiment, the coil component core 100 and the coil component 200 include the plurality of core cores 30 (the first core core 31 and the second core core 32), and between them. The effect obtained by forming the non-magnetic gap 50 on the coil component, and the coil component core 100 and the coil component 200 in the first embodiment include a plurality of ring cores 40 (first ring core 41 and second ring core 42). In addition, the same effects as those of the first embodiment can be obtained except for the effects obtained by forming the nonmagnetic gap 50 between them.

[Third Embodiment]
Next, a third embodiment will be described with reference to FIGS. 10 and 11.
FIG. 11 is a cross-sectional view of the coil component 200 along the axis of the core core 30 (the first core core 31 and the second core core 32).
The coil component core 100 and the coil component 200 according to the present embodiment are different from the coil component core 100 and the coil component 200 according to the first embodiment described above in other points. The coil component core 100 and the coil component 200 according to the first embodiment are configured in the same manner.

  As shown in FIGS. 10 and 11, in the case of the present embodiment, the first spacer 61 and the second spacer 62 are constituted by a part of one sheet-like spacer 65. For this reason, manufacturability of the coil component core 100 and the coil component 200 is improved.

More specifically, the first spacer 61 between the first plate core 10 and the first ring core 41 and the second spacer 62 between the first plate core 10 and the first core core 31 are the same. Each of the spacers 65 is constituted by a part. Further, the first spacer 61 between the second plate core 20 and the second ring core 42 and the second spacer 62 between the second plate core 20 and the second core core 32 are included in one spacer 65. It consists of one part at a time. Each spacer 65 includes a first spacer 61, a second spacer 62, and a connection portion 66 that connects the first spacer 61 and the second spacer 62. The planar shape of each spacer 65 is a rectangular shape (for example, a square shape) similar to that of the first plate core 10 and the second plate core 20. The spacers 65 are arranged so that the outlines of the spacers 65 coincide with the outlines of the first plate core 10, the second plate core 20, the first ring core 41, and the second ring core 42 in plan view.
The spacer 65 may be an adhesive or an adhesive such as a double-sided tape.

[Fourth Embodiment]
Next, a fourth embodiment will be described with reference to FIG.
FIG. 12 is a cross-sectional view of the coil component 200 along the axis of the core core 30.
The coil component core 100 and the coil component 200 according to the present embodiment are different from the coil component core 100 and the coil component 200 according to the first embodiment described above in other points. The coil component core 100 and the coil component 200 according to the first embodiment are configured in the same manner.

In the present embodiment, the dimension of the core core 30 in the axial direction of the core core 30 and the thickness dimension of the ring core 40 are different from each other.
For example, as shown in FIG. 12, the dimension of the core core 30 in the axial direction of the core core 30 is larger than the thickness dimension of the ring core 40.
More specifically, the coil component core 100 and the coil component 200 include a single core 30 and do not include the fourth spacer 64 (see FIG. 2). The dimension of the core core 30 in the axial direction of the core core 30 is equal to the sum of the thickness dimension of the first ring core 41, the thickness dimension of the second ring core 42, and the thickness dimension of the third spacer 63.

  In contrast to the example shown in FIG. 12, the dimension of the core core 30 in the axial direction of the core core 30 may be smaller than the thickness dimension of the ring core 40. For example, the coil component core 100 and the coil component 200 include a single ring core 40 and a plurality of core cores 30 (for example, as shown in FIG. Two core cores 30), that is, the core core 31 and the second core core 32, may be provided. In this case, the coil component core 100 and the coil component 200 do not include the third spacer 63, and the thickness dimension of the ring core 40 is the thickness dimension of the first core core 31 and the thickness dimension of the second core core 32. And the thickness dimension of the fourth spacer 64 (see FIG. 2).

[Fifth Embodiment]
Next, a fifth embodiment will be described with reference to FIG.
FIG. 13 is a cross-sectional view of the coil component 200 along the axis of the core core 30.
The coil component core 100 and the coil component 200 according to the present embodiment are different from the coil component core 100 and the coil component 200 (FIGS. 6 to 9) according to the second embodiment described above in the points described below. In other respects, the configuration is the same as the coil component core 100 and the coil component 200 according to the second embodiment.

In the case of this embodiment, circular openings 10a and 20a are formed in the central portion of the first plate core 10 and the central portion of the second plate core 20, respectively. One end of the core core 30 is inserted into the opening 10a, and the other end of the core core 30 is inserted into the opening 20a.
A nonmagnetic gap 50 is formed between the first plate core 10 and the core core 30 and between the second plate core 20 and the core core 30. That is, between the inner peripheral surface of the opening 10 a of the first plate core 10 and the outer peripheral surface of one end portion of the core core 30, and the inner peripheral surface of the opening 20 a of the second plate core 20 and the other core core 30. Spacers 68 constituting nonmagnetic gaps 50 are interposed between the outer peripheral surfaces of the end portions. Each spacer 68 may be an adhesive or a double-sided tape or the like having adhesiveness. Alternatively, a double-sided tape coated with a thermosetting adhesive resin may be used. Further, when a holding means such as a clip is attached separately, a nonmagnetic material that does not have adhesiveness may be used.
According to the present embodiment, since the magnetic path length passing through the first plate core 10 and the second plate core 20 can be shortened, it is possible to further improve the DC superposition characteristics of the coil component core 100 and the coil component 200. .

In the example of FIG. 13, an example in which the coil component core 100 and the coil component 200 include a single core core 30 is illustrated, but a plurality of core cores 30 are provided as in the first embodiment. You may have.
Further, an opening may be formed in the central portion of only one of the first plate core 10 and the second plate core 20, and one end of the core core 30 may be inserted into the opening.

[Sixth Embodiment]
Next, a sixth embodiment will be described with reference to FIGS. 14 and 15.
In FIG. 15, the second plate core 20, the first spacer 61, and the second spacer 62 in the configuration of the coil component 200 are shown separated from the other parts in the coil component 200.
The coil component core 100 and the coil component 200 according to the present embodiment are different from the coil component core 100 and the coil component 200 according to the first embodiment described above in other points. The coil component core 100 and the coil component 200 according to the first embodiment are configured in the same manner.

  In the first embodiment, as shown in FIG. 3, the portion of the first lead-out wiring portion 72 located on the side surface of the coil component core 100 is nonmagnetic between the second ring core 42 and the first ring core 41. Covers the gap 50. Similarly, although not shown, a portion of the second lead-out wiring portion 73 located on the side surface of the first plate core 10 covers the nonmagnetic gap 50.

On the other hand, in the case of the present embodiment, as shown in FIG. 15, the portion located on the side surface of the coil component core 100 in the first lead-out wiring portion 72 is between the second ring core 42 and the first ring core 41. The first lead wiring portion 72 is arranged so as not to cover the nonmagnetic gap 50. Similarly, although not shown, the second lead-out wiring portion 73 is arranged so that the portion of the second lead-out wiring portion 73 located on the side surface of the first plate core 10 does not cover the nonmagnetic gap 50. Yes.
In order to realize such a configuration, as shown in FIG. 14, the wire lead-out groove 43 is not the surface of the second ring core 42 on the second plate core 20 side, but the first plate core 10 side of the first ring core 41. It is formed on the surface.

  According to this embodiment, since the location where the 1st extraction wiring part 72 and the 2nd extraction wiring part 73 cover the nonmagnetic gap 50 can be reduced, an eddy current loss can further be suppressed.

[Seventh Embodiment]
Next, a seventh embodiment will be described with reference to FIG.
FIG. 16 is a cross-sectional view of the coil component 200 along the axis of the core core 30 (the first core core 31 and the second core core 32).
The coil component core 100 and the coil component 200 according to the present embodiment are different from the coil component core 100 and the coil component 200 according to the first embodiment described above in other points. The coil component core 100 and the coil component 200 according to the first embodiment are configured in the same manner.

In the present embodiment, the thickness dimension of the first plate core 10 and the second plate core 20 is larger than the thickness dimension of the first ring core 41 and the second ring core 42.
That is, the axis of the core core 30 is larger than the dimension of the ring core 40 (first ring core 41 and second ring core 42) in the axial direction of the core core 30 (first core core 31 and second core core 32). The dimension of the first plate core 10 or the second plate core 20 in the central direction is large.
Thereby, in the 1st plate core 10 and the 2nd plate core 20, since the cross-sectional area orthogonal to a magnetic path direction can fully be ensured, the direct current superimposition characteristic of the core 100 for coil components and the coil component 200 is improved. Can do.

  More specifically, in the case of the present embodiment, the core core 30 (the first core core 31 and the second center core) in the axial direction of the core core 30 (the first core core 31 and the second core core 32). The dimension of the first plate core 10 or the second plate core 20 in the axial direction is larger than the dimension of the core core 32).

Hereinafter, each example and each comparative example will be described with reference to FIGS. 17 and 18.
As shown in FIG. 17, the structure of the coil components of Examples 1 to 6 and 13 is the first structure. The first structure is the structure of the first embodiment (FIG. 4), and six nonmagnetic gaps are formed in the magnetic path (gap number = 6).
The structures of the coil components of Examples 7 to 12 and 14 are the second structure. The second structure is the structure of the second embodiment (FIG. 9), and four nonmagnetic gaps are formed in the magnetic path (gap number = 4).

Each core piece of the coil component of Examples 1-6 was produced as follows. First, 2% by mass of an epoxy resin as a binder was mixed with an Fe—Si—Cr alloy powder having an insulating surface treatment and a particle size of 10 μm to 20 μm to obtain a granulated powder. Using this granulated powder, a square shape with a side length of 10 mm and a thickness of 1.2 mm, and a square shape with a side length of 10 mm (first plate core and second plate core) A ring core (first ring core and second ring core) with a thickness of 1.2 mm and an opening with an inner diameter of 8 mm in the center, and a cylindrical shape with an outer diameter of 3.8 mm and a dimension in the axial direction of 1.2 mm A core core (a first core core and a second core core) was molded. At this time, the relative permeability of each core piece was varied by changing the molding pressure to adjust the density of each core piece. The relative permeability of each core piece was 40 in Example 1, 45 in Example 2, 50 in Example 3, 55 in Example 4, 70 in Example 5, and 90 in Example 6. Thus, each core piece of the coil components of Examples 1 to 6 is a dust core configured to include the metal magnetic powder material.
Moreover, each core piece of the coil component of Example 13 was produced in the same shape as each core piece of Examples 1 to 6 using ferrite, and the relative permeability was set to 1100.

Moreover, the material of each core piece of the coil component of Examples 7-12 was made the same as Examples 1-6. That is, each core piece of the coil components of Examples 7 to 12 is also a dust core configured to include the metal magnetic powder material. Among each core piece of the coil components of Examples 7 to 12, the plate core (first plate core and second plate core) is the same as that of Examples 1 to 6, and the ring core (first ring core and second ring core). As a core, a square shape with a side length of 10 mm, a thickness of 2.5 mm, and an opening with an inner diameter of 8 mm is formed in the center, and the core core has an outer diameter of 3.8 mm in the axial direction. A cylinder having a dimension of 2.5 mm was produced. Also in Examples 7 to 12, the relative permeability of each core piece was varied by changing the molding pressure and adjusting the density of each core piece. The relative magnetic permeability of each core piece was 40 in Example 7, 45 in Example 8, 50 in Example 9, 55 in Example 10, 70 in Example 11, and 90 in Example 12.
Moreover, each core piece of the coil component of Example 14 was produced in the same shape as each core piece of Examples 7 to 12 with ferrite, and the relative permeability was set to 1100.

The coil component of Comparative Example 1 (third structure) is a metal composite core in which a core is integrally formed. The material of the core of Comparative Example 1 was the same as that of Example 1. The relative magnetic permeability of the core of Comparative Example 1 was 25.
Each core piece of the coil component of Comparative Example 2 (fourth structure) includes the second plate core of Example 7, and the core core, ring core, and first plate core of Example 7 are integrated. It has a pot-type core. In Comparative Example 2, a nonmagnetic gap is formed between the core core and the second plate core, but the ring core and the second plate core are in contact with each other, and a nonmagnetic gap is formed between them. Not. The relative permeability of each core piece of the coil component of Comparative Example 2 was 40.
As the coil component of Comparative Example 3 (fifth structure), the core pieces are in contact with each other, the gap width is 0 mm (that is, there is no nonmagnetic gap), and the relative permeability of each core piece is 25, a configuration different from the coil component of Example 1 was used.
As the coil component of Comparative Example 4 (sixth structure), the core pieces are in contact with each other, the gap width is 0 mm (that is, no nonmagnetic gap), and the relative permeability of each core piece is 25, a configuration different from the coil component of Example 7 was used.
The configuration in which the gap width is 0 mm as in Comparative Examples 3 and 4 does not correspond to the configuration having the nonmagnetic gap as in the above embodiments.
Each core piece of the coil component of Comparative Example 5 (fourth structure) includes the second plate core of Example 13, and the core core, ring core, and first plate core of Example 13 are integrated. It has a pot-type core. In Comparative Example 5, a nonmagnetic gap is formed between the core core and the second plate core, but the ring core and the second plate core are in contact with each other, and a nonmagnetic gap is formed between them. Not. The relative magnetic permeability of each core piece of the coil component of Comparative Example 5 was 1100.

As the coils of Examples 1 to 14 and Comparative Examples 1 to 5, a coated conductor having an outer diameter of 0.5 mm was used. The outer diameter of the coil was 7.8 mm, the inner diameter of the coil was 4.0 mm, and the axis of the coil A product having a dimension in the core direction of 2.4 mm or less and a winding number of 1.3 turns was prepared and used.
In each example excluding Comparative Examples 1, 3, and 4, a non-magnetic gap was formed by interposing a PET film having an appropriate thickness punched into a core shape as a spacer between the core pieces, and the initial inductance. The value (initial L value in FIG. 17) was adjusted to about 10 μH.
In Comparative Examples 1, 3, and 4, the initial inductance value (initial L value in FIG. 17) was adjusted to about 10 μH.
Further, both end portions of the coil were led out to the outside through the wire lead groove of the ring core and connected to the electrodes (first electrode, second electrode). The electrode was fixed with an adhesive after insulating coating was applied to the bottom and side surfaces of the coil component. Further, this electrode was arranged so as not to cross the nonmagnetic gap portion in order to avoid the influence of the leakage magnetic flux of the nonmagnetic gap.

The direct current superposition characteristics shown in FIG. 17 are direct current values when the inductance value (L value) is reduced by 30% compared to the initial value. It can be determined that the higher this value is, the higher the current is, the higher the inductance value is (that is, the better the performance).
The determination of A to D shown in FIG. 17 is that the core material includes a metal magnetic powder material (Comparative Examples 1 to 4 and Examples 1 to 12) having a DC superposition characteristic of 9.5 or more. A and less than 9.5 were C.
Moreover, about the thing (comparative example 5, Example 13, 14) whose material of each core is a ferrite, the thing with a DC superimposition characteristic of 8.0 or more was set to B, and the thing of less than 8.0 was set to D.
Determination of each Examples 1-12 became A. On the other hand, the judgment of each comparative example 1-4 became C. Each of Examples 1 to 12 and Comparative Examples 1 to 4 are examples in which the core material includes a metal magnetic powder material. In each of Examples 1 to 12, the DC superposition characteristics are higher than those of Comparative Examples 1 to 4. It turns out that it improves.
Moreover, the determination of each Example 13 and 14 was set to B. On the other hand, the determination of Comparative Example 5 was D. Each of Examples 13 and 14 and Comparative Example 5 are examples using a ferrite core, but in each of Examples 13 and 14, it was found that the DC superposition characteristics were improved more than twice as compared with Comparative Example 5. .

FIG. 18 is a graph (solid line) plotting the relationship between the relative permeability (horizontal axis) and the DC superposition characteristics (vertical axis) for each of the examples with 6 gaps (Examples 1 to 6, Comparative Example 3). ) And a graph (broken line) plotting the relationship between the relative magnetic permeability (horizontal axis) and the DC superposition characteristics (vertical axis) for each example (Examples 7 to 12 and Comparative Example 4) having a gap number of 4, Is shown.
From FIG. 18, in each Example, the favorable DC superimposition characteristic of about 10 (A) or more is obtained. It can be seen that when the relative permeability is 45 or more, the direct current superposition characteristics are dramatically improved as compared with the case where the relative permeability is 40 or less. It can also be seen that the direct current superimposition characteristics are further improved dramatically when the relative permeability is 55 or more compared to when the relative permeability is 50 or less.

  As mentioned above, although each embodiment was described with reference to drawings, these are illustrations of the present invention, and various configurations other than the above can also be adopted. Moreover, each said embodiment can be combined suitably in the range which does not deviate from the main point of this invention.

This embodiment includes the following technical ideas.
(1) A coil component core configured to include a plurality of core pieces,
The plurality of core pieces include
A first plate core and a second plate core disposed opposite to each other;
A core core disposed at a facing interval between the first plate core and the second plate core;
A ring core that is disposed at a facing interval between the first plate core and the second plate core, and through which the core core is inserted;
Contains
A coil component core in which a nonmagnetic gap is formed between core pieces disposed adjacent to each other among the plurality of core pieces.
(2) The coil component core according to (1), further including a plurality of the ring cores arranged in a stacked manner, wherein the nonmagnetic gap is formed between the plurality of ring cores.
(3) (1) or (2), including a plurality of the cores arranged coaxially with each other, wherein the nonmagnetic gap is formed between the plurality of cores. Core for coil parts.
(4) The coil component core according to any one of (1) to (3), wherein the dimension of the core core and the dimension of the ring core in the axial direction of the core core are equal to each other.
(5) The coil component core according to (1) or (2), wherein a height of the core core is different from a height of the ring core.
(6) A first non-magnetic gap is formed between at least one of the first plate core and the ring core and between the second plate core and the ring core to form the non-magnetic gap. The coil component core according to any one of (1) to (5), wherein one spacer is interposed.
(7) The nonmagnetic gap is formed of a nonmagnetic material between at least one of the first plate core and the core core and between the second plate core and the core core. The core for coil components as described in any one of (1) to (6) in which the 2nd spacer which comprises is interposed.
(8) A first spacer made of a nonmagnetic material is interposed between at least one of the first plate core and the ring core and between the second plate core and the ring core. ,
A second spacer made of a nonmagnetic material is interposed between at least one of the first plate core and the core core and between the second plate core and the core core. And
One said 1st spacer and one said 2nd spacer are the cores for coil components as described in any one of (1) to (5) arrange | positioned on the same plane.
(9) The coil component core according to (8), wherein the first spacer and the second spacer are configured by a part of one sheet-like spacer.
(10) The coil component core according to any one of (6), (8), and (9), wherein the first spacer has adhesiveness.
(11) The coil component core according to any one of (7) to (9), wherein the second spacer has adhesiveness.
(12) The coil component core according to any one of (1) to (11), wherein each of the plurality of core pieces includes a metal magnetic powder material.
(13) The dimensions of the first plate core or the second plate core in the axial direction of the central core are larger than the dimensions of the ring core in the axial direction of the central core (1) to (12) The core for coil components as described in any one of these.
(14) The coil component core according to any one of (1) to (13), wherein each of the plurality of core pieces has a relative magnetic permeability of 45 or more.
(15) The coil component core according to any one of (1) to (14), wherein a saturation magnetic flux density of each of the plurality of core pieces is 600 mT or more.
(16) A coil component comprising: the coil component core according to any one of (1) to (15); and a coil through which the core core of the coil component core is inserted.
(17) In the total magnetic path length of the coil component, the magnetic path length that passes through each of the plurality of core pieces is 25% or less of the total magnetic path length. Coil parts.
(18) Of the total magnetic path length of the coil component, the magnetic path length that passes through each of the plurality of core pieces is 20% or less of the total magnetic path length (16) or ( 17) The coil component according to 17).
(19) The coil component according to any one of (16) to (19), wherein six or more nonmagnetic gaps are formed in a magnetic path of the coil component.
(20) One end portion and the other end portion of the coil are individually drawn out to the side surface of the coil component through the plurality of core pieces,
The coil parts
A first electrode disposed from the bottom surface of the coil component to the side surface and electrically connected to one end of the coil;
A second electrode disposed from the bottom surface of the coil component to the side surface and electrically connected to the other end of the coil;
With
The coil component according to any one of (16) to (19), wherein a portion of the first electrode and the second electrode disposed on a side surface of the coil component terminates on the side surface of the second plate core.

10 first plate core 10a opening 20 second plate core 20a opening 30 core core 31 first core core 32 second core core 40 ring core 40a opening 41 first ring core 41a opening 42 second ring core 42a opening 43 wire drawing groove 50 Nonmagnetic gap 61 1st spacer 62 2nd spacer 63 3rd spacer 64 4th spacer 65 Spacer 66 Connection part 68 Spacer 70 Coil 71 Wire 72 1st extraction wiring part (one end part of a coil)
73 Second lead wiring part (other end of coil)
74 1st electrode 75 2nd electrode 80 Magnetic path 100 Core 200 for coil components Coil components

Claims (20)

A coil component core comprising a plurality of core pieces,
The plurality of core pieces include
A first plate core and a second plate core disposed opposite to each other;
A core core disposed at a facing interval between the first plate core and the second plate core;
A ring core that is disposed at a facing interval between the first plate core and the second plate core, and through which the core core is inserted;
Contains
A coil component core in which a nonmagnetic gap is formed between core pieces disposed adjacent to each other among the plurality of core pieces.   2. The coil component core according to claim 1, further comprising a plurality of the ring cores arranged in a stacked manner, wherein the nonmagnetic gap is formed between the plurality of ring cores.   3. The coil component core according to claim 1, further comprising a plurality of the cores arranged coaxially with each other, wherein the nonmagnetic gap is formed between the plurality of cores. .   The core for coil components according to any one of claims 1 to 3, wherein a dimension of the core core and a dimension of the ring core in the axial direction of the core core are equal to each other.   The core for coil parts according to claim 1 or 2, wherein the height of the core core is different from the height of the ring core.   At least one of the first plate core and the ring core and between the second plate core and the ring core is formed of a nonmagnetic material and includes a first spacer that forms the nonmagnetic gap. The core for coil components according to any one of claims 1 to 5, wherein the core is provided.   At least one of the first plate core and the core core and between the second plate core and the core core is made of a nonmagnetic material to form the nonmagnetic gap. The core for coil components according to any one of claims 1 to 6, wherein a second spacer is interposed. A first spacer made of a nonmagnetic material is interposed between at least one of the first plate core and the ring core and between the second plate core and the ring core,
A second spacer made of a nonmagnetic material is interposed between at least one of the first plate core and the core core and between the second plate core and the core core. And
The core for coil components according to any one of claims 1 to 5, wherein one of the first spacers and one of the second spacers are arranged on the same plane.   The coil component core according to claim 8, wherein the first spacer and the second spacer are constituted by a part of one sheet-like spacer.   The coil component core according to any one of claims 6, 8, and 9, wherein the first spacer has adhesiveness.   The core for a coil component according to any one of claims 7 to 9, wherein the second spacer has adhesiveness.   The core for coil components according to any one of claims 1 to 11, wherein each of the plurality of core pieces includes a metal magnetic powder material.   The dimension of the said 1st plate core or the said 2nd plate core in the axial center direction of the said core core is larger than the dimension of the said ring core in the axial center direction of the said core core. The core for coil components as described in 2.   The core for a coil component according to any one of claims 1 to 13, wherein each of the plurality of core pieces has a relative magnetic permeability of 45 or more.   The core for coil components according to any one of claims 1 to 14, wherein a saturation magnetic flux density of each of the plurality of core pieces is 600 mT or more.   A coil component comprising: the coil component core according to any one of claims 1 to 15; and a coil into which the core core of the coil component core is inserted.   17. The coil component according to claim 16, wherein, of all the magnetic path lengths of the coil component, a magnetic path length passing through each of the plurality of core pieces is 25% or less of the total magnetic path length. .   18. The magnetic path length passing through the individual core pieces of the plurality of core pieces among all the magnetic path lengths of the coil parts is 20% or less of the total magnetic path length. Coil parts.   The coil component according to any one of claims 16 to 18, wherein six or more nonmagnetic gaps are formed in a magnetic path of the coil component. One end and the other end of the coil are individually drawn out to the side of the coil component through the plurality of core pieces,
The coil parts
A first electrode disposed from the bottom surface of the coil component to the side surface and electrically connected to one end of the coil;
A second electrode disposed from the bottom surface of the coil component to the side surface and electrically connected to the other end of the coil;
With
The coil as described in any one of Claim 16 to 19 in which the part arrange | positioned in the side surface of the said coil component in the said 1st electrode and the said 2nd electrode terminates on the side surface of the said 2nd plate core. parts.

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