JP7314615B2 - coil parts - Google Patents

Description

The present invention relates to a coil component, and more particularly to a coil component having a structure in which a plate-like member is provided below a winding core around which a wire is wound, and terminal electrodes are provided on the plate-like member.

The coil component described in Patent Document 1 has a plate-shaped magnetic core around which two wires are wound, and an E-shaped magnetic core adhered to the plate-shaped magnetic core. By removing the insulating coating from the ends of the wires, the ends of the wires themselves are used as terminal electrodes.

The coil component described in Patent Document 2 has a drum-shaped magnetic core having a winding core around which two wires are wound and a pair of flanges, and a C-shaped magnetic core that covers the winding core from three directions.

However, the coil component described in Patent Literature 1 has a configuration in which most of the wire is exposed, so it is difficult to ensure high reliability. Further, in the coil component described in Patent Document 2, since the wire wound around the winding core and the mounting substrate face each other directly, there is a problem of reduced reliability in this portion.

On the other hand, in the coil component described in Patent Document 3, since the plate-shaped magnetic core is arranged below the drum-shaped magnetic core, the wire wound around the winding core and the mounting substrate do not directly face each other.

JP 2007-165407 A Japanese Unexamined Patent Application Publication No. 2008-10578 JP 2010-10354 A

However, in the coil component described in Patent Document 3, a plurality of openings are formed in the flange of the drum-shaped magnetic core, and the wires are passed through the openings to connect the wires and the terminal electrodes. Here, since the opening provided in the flange of the magnetic core is wide in the direction perpendicular to the direction in which the magnetic flux flows, a large amount of the magnetic flux is divided, the magnetic resistance increases, and as a result the inductance decreases.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a coil component that can be mounted without the wires wound around the winding core and the mounting substrate directly facing each other and that can obtain a high inductance.

A coil component according to the present invention includes: a magnetic core having a winding core having a first direction as an axial direction; a first flange positioned on one end side of the winding core in the first direction; and a second flange positioned on the other end side of the winding core in the first direction; a first wire wound around the winding core; and first and second terminal electrodes fixed to the first plate-shaped member at a position not overlapping the first and second flanges, and having one end and the other end of the first wire spliced, respectively, wherein the width of the first and second flanges in a third direction orthogonal to the first and second directions is the first width, and the width of the first plate-shaped member in the third direction at the portion where the first and second terminal electrodes are fixed is It is characterized by having a second width that is narrower than the first width.

According to the present invention, reliability can be improved by mounting the first plate-like member between the mounting substrate and the winding core. Moreover, since the first and second terminal electrodes are provided at positions that do not overlap the first and second flanges, there is no need to provide openings in the flanges of the magnetic core, thereby obtaining high inductance. Furthermore, since the width of the first plate-shaped member is reduced at the portion where the first and second terminal electrodes are fixed, the amount of protrusion of the first and second wires and the first and second terminal electrodes in the third direction can be reduced.

In the present invention, the width in the third direction of the first plate member at the portion where the first and second flanges are fixed may be wider than the second width. According to this, it becomes possible to fix the 1st plate-shaped member and the 1st and 2nd collar part more firmly.

The coil component according to the present invention further includes a second wire wound around the winding core, and third and fourth terminal electrodes fixed to the first plate-shaped member at a position not overlapping the first and second flanges, and connected to one end and the other end of the second wire, respectively. According to this, the amount of projection in the third direction of the third and fourth wires and the third and fourth terminal electrodes can be reduced.

In the present invention, the width in the third direction of the first plate member in the central region located between the portion where the first and second flanges are fixed and the portion where the third and fourth flanges are fixed may be a third width wider than the second width. This facilitates positioning of the first to fourth terminal electrodes.

In the present invention, the third width may be narrower than the first width. According to this, interference between the central region of the first plate member and the first to fourth terminal electrodes is less likely to occur.

In the present invention, the first plate member has an upper surface facing the magnetic core, a lower surface opposite to the upper surface, and first and second side surfaces extending in first and second directions and opposite to each other. It may be composed of terminal fittings arranged in the first direction along the side surface of the terminal. According to this, it becomes possible to further improve the connection reliability between the wire and the terminal electrode.

In the present invention, the terminal fitting may have a fixed portion fixed to the first plate-like member and a leaf spring portion connected to the fixed portion without contacting the first plate-like member. According to this, even if the mounting substrate is deformed such as bending after the coil component is mounted on the mounting substrate, the stress applied to the first plate-like member is relieved by the leaf spring portion. This makes it possible to prevent damage to the first plate member due to deformation of the mounting substrate.

In the present invention, the first plate member may be made of a magnetic material. According to this, it becomes possible to increase the inductance of the coil component.

The coil component according to the present invention may further include a second plate member fixed to the first and second flanges so as to cover the magnetic core from the other side in the second direction. According to this, since the core part is covered from two directions above and below, reliability can be further improved. Further, in the mounting process, the picking tool can be used to suck the second plate member, which facilitates handling of the coil component.

In the present invention, the second plate member may be made of a magnetic material. According to this, it becomes possible to further increase the inductance of the coil component.

As described above, according to the present invention, in a coil component having a structure in which a plate-like member is provided below a winding core around which a wire is wound and a terminal electrode is provided on the plate-like member, a high inductance can be obtained, and the amount of protrusion of the wire and the terminal electrode can be reduced.

FIG. 1 is a schematic perspective view showing the appearance of a coil component 1 according to a preferred embodiment of the present invention. FIG. 2 is a schematic exploded perspective view of the coil component 1. FIG. 3A and 3B are schematic perspective views for explaining the shape of the first plate member 20. FIG. 3A is a view from the upper surface 21 side, and FIG. 3B is a view from the lower surface 22 side. FIG. 4 is a plan view of the first plate member 20 with the terminal fittings 41 to 44 attached. FIG. 5 is a schematic diagram for explaining an example of the winding pattern of the wires W1 and W2. FIG. 6 is a schematic plan view showing a state in which the coil component 1 is mounted on the mounting substrate 8. As shown in FIG. FIG. 7 is a schematic perspective view for explaining the shape of the terminal fittings 41-44. FIG. 8 is a schematic cross-sectional view for explaining a state in which the terminal fitting 41 is fixed to the first plate member 20. As shown in FIG. FIG. 9 is a plan view of a plate member 20A according to the first modification. FIG. 10 is a plan view of a plate member 20B according to a second modification. FIG. 11 is a plan view of a plate member 20C according to a third modification.

Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic perspective view showing the appearance of a coil component 1 according to a preferred embodiment of the present invention. 2 is a schematic exploded perspective view of the coil component 1. FIG.

A coil component 1 according to the present embodiment is a coil component suitable for use as a common mode filter or a coupled inductor for a power supply, and as shown in FIGS.

A drum-shaped magnetic core 10 is composed of a first flange portion 11, a second flange portion 12, and a winding core portion 13 positioned therebetween. A pair of wires W1 and W2 are wound around the winding core 13 so that the coil axis direction is the x direction. One end W1a and the other end W1b of the wire W1 are connected to terminal fittings 41 and 42, respectively, and one end W2a and the other end W2b of the wire W2 are connected to terminal fittings 43 and 44, respectively. The first plate member 20 is a magnetic member that covers the magnetic core 10 from one side in the z direction, and forms a mounting surface that faces the mounting substrate during mounting. The second plate-shaped member 30 is a magnetic member that covers the magnetic core 10 from the other side in the z direction, and also functions as an attraction surface that is attracted by a pickup tool during mounting. As a result, the magnetic core 10 is sandwiched between the first plate member 20 and the second plate member 30 from above and below. As materials for the magnetic core 10, the first plate-like member 20, and the second plate-like member 30, magnetic materials with high magnetic permeability, such as ferrite, metal magnetic bodies, and resins containing magnetic bodies, are used. However, the first and second plate members 20 and 30 may be made of non-magnetic material such as resin instead of magnetic material.

The first plate member 20 has an upper surface 21 covering the magnetic core 10, a lower surface 22 opposite to the upper surface 21, and first and second side surfaces 23 and 24 opposite to each other. The upper surface 21 and the lower surface 22 form an xy plane, and the side surfaces 23 and 24 form an xz plane. The second plate-like member 30 has a lower surface 31 covering the magnetic core 10 and an upper surface 32 located on the opposite side of the lower surface 31 . The lower surface 31 and the upper surface 32 form an xy plane.

The magnetic core 10 and the first plate member 20 are fixed to each other with adhesives 51 and 52 . The adhesive 51 adheres the first collar portion 11 of the magnetic core 10 and the upper surface 21 of the first plate member 20 . The adhesive 52 adheres the second flange portion 12 of the magnetic core 10 and the upper surface 21 of the first plate member 20 . The magnetic core 10 and the second plate member 30 are fixed to each other with adhesives 53 and 54 . The adhesive 53 bonds the first flange portion 11 of the magnetic core 10 and the lower surface 31 of the second plate member 30 . The adhesive 54 adheres the second collar portion 12 of the magnetic core 10 and the lower surface 31 of the second plate member 30 . Here, if the adhesives 51 to 54 containing a magnetic material are used, the magnetic resistance between the magnetic core 10 and the first and second plate-like members 20, 30 is reduced, so that the inductance of the coil component 1 can be increased.

3A and 3B are schematic perspective views for explaining the shape of the first plate member 20. FIG. 3A is a view from the upper surface 21 side, and FIG. 3B is a view from the lower surface 22 side. FIG. 4 is a plan view of the first plate member 20 with the terminal fittings 41 to 44 attached.

As shown in FIGS. 3 and 4, the first plate member 20 has two grooves 25 and 26 extending in the y direction. Grooves 25 and 26 are provided over upper surface 21 and side surfaces 23 and 24 . On the other hand, the lower surface 22 is flat. The terminal fitting 41 is fixed to a portion of the groove portion 25 corresponding to the side surface 23, the terminal fitting 42 is fixed to a portion of the groove portion 25 corresponding to the side surface 24, the terminal fitting 43 is fixed to a portion of the groove portion 26 corresponding to the side surface 23, and the terminal fitting 44 is fixed to a portion of the groove portion 26 corresponding to the side surface 24. Thus, the terminal fittings 41 and 43 are arranged along the side surface 23 in the x direction, and the terminal fittings 42 and 44 are arranged along the side surface 24 in the x direction.

As shown in FIG. 4 , the width of the first plate member 20 in the y direction is a width D0 in an area A0 where the first and second flanges 11 and 12 are fixed, a width D2 in an area A2 where the grooves 25 and 26 are provided, and a width D3 in a central area A3 located between the grooves 25 and 26. Then, when the width in the y direction of the first and second collar portions 11 and 12 is D1, in this embodiment,
D0=D1>D3>D2
is filled. Thus, the first plate member 20 has the smallest width D2 in the area A2 where the grooves 25 and 26 are provided, and the terminal fittings 41 to 44 are fixed to this area. The setback amount D4 of the area A2 with respect to the area A0 is preferably set to an amount such that the wires W1, W2 and the terminal fittings 41 to 44 do not protrude when viewed from the z direction. That is, it is preferable to set the setback amount D4 so that the width of the area A2 including the wires W1, W2 and the terminal fittings 41 to 44 is equal to or less than the maximum width D0 of the first plate member 20. FIG. FIG. 4 shows the state before the terminal fittings 41 to 44 are bent, so that some of the terminal fittings 41 to 44 protrude in the y direction from the area A0. However, when the ends of the wires W1 and W2 are fixed by partially bending the terminal fittings 41 to 44, the wires W1 and W2 and the terminal fittings 41 to 44 do not protrude in the y direction.

In this embodiment, the width D3 of area A3 is slightly larger than the width D2 of area A2. As a result, the side surfaces 23 and 24 of the first plate-like member 20 are formed with steps in the y-direction at the boundaries between the areas A2 and A3, which facilitates positioning of the terminal fittings 41 to 44 in the x-direction. Also, since the width D3 of the area A3 is smaller than the width D0 of the area A0, interference between the wires W1 and W2 and the area A3 is less likely to occur.

On the other hand, the depth in the z-direction of the grooves 25 and 26 on the upper surface 21 may be approximately the same as the thickness of the terminal fittings 41-44.

FIG. 5 is a schematic diagram for explaining an example of the winding pattern of the wires W1 and W2.

In the example shown in FIG. 5, the winding direction of the wire W1 from one end W1a to the other end W1b is the same as the winding direction of the wire W2 from the one end W2a to the other end W2b. Therefore, the direction of the magnetic flux generated when the current is passed from the one end W1a of the wire W1 to the other end W1b is the same as the direction of the magnetic flux generated when the current is passed from the one end W2a to the other end W2b of the wire W2. One end W1a and the other end W1b of the wire W1 are connected to the terminal fittings 41 and 42, respectively, and one end W2a and the other end W2b of the wire W2 are connected to the terminal fittings 43 and 44, respectively. Thus, the coil component 1 according to the present embodiment functions as a common mode filter having the terminal fittings 41 and 43 as a pair of input terminals and the terminal fittings 42 and 44 as a pair of output terminals.

FIG. 6 is a schematic plan view showing a state in which the coil component 1 according to this embodiment is mounted on the mounting substrate 8. As shown in FIG.

As shown in FIG. 6, the mounting board 8 is formed with a pair of power lines L1 and L3 and a pair of power lines L2 and L4. A pair of power supply lines is a power supply line to which one is supplied with a reference potential (for example, a ground potential) and a power supply line to which the other is supplied with a power supply potential. Then, the coil component 1 according to the present embodiment is mounted on the mounting board 8 so that the terminal fittings 41 to 44 and the power lines L1 to L4 are connected to each other. As a result, load currents flow in opposite directions between the terminal fittings 41 and 42 and between the terminal fittings 43 and 44 . Then, for example, common mode noise superimposed on the pair of power supply lines L1 and L3 is removed by the coil component 1, and the power supply voltage from which the common mode noise is removed is output from the pair of power supply lines L2 and L4. As is clear from FIG. 6, in the coil component 1 according to this embodiment, the coil axis (x direction) is perpendicular to the extending direction (y direction) of the power supply lines L1 to L4.

As described above, in the coil component 1 according to the present embodiment, since the magnetic core 10 is vertically sandwiched between the first and second plate members 20 and 30, high reliability can be obtained. In particular, if one or both of the first and second plate-like members 20 and 30 are made of a magnetic material, a closed magnetic circuit with low magnetic resistance is formed. This makes it possible to obtain a high impedance for common mode components. Moreover, since the terminal fittings 41 to 44 are fixed at positions that do not overlap the flanges 11 and 12 when viewed in the z direction, there is no need to form openings in the magnetic core 10 for passing the wires W1 and W2. This makes it possible to prevent an increase in magnetic resistance due to the formation of the opening in the magnetic core 10 .

Furthermore, in the present embodiment, since the width of the first plate-like member 20 in the y direction is reduced in the region A2 where the terminal fittings 41 to 44 are fixed, the terminal fittings 41 to 44 and the wires W1 and W2 can be reduced in the y direction, even though the terminal fittings 41 to 44 are fixed to the side surfaces 23 and 24. Preferably, the terminal fittings 41 to 44 and the wires W1 and W2 can be prevented from projecting in the y direction.

FIG. 7 is a schematic perspective view for explaining the shape of the terminal fittings 41-44.

As shown in FIG. 7, the terminal fittings 41 to 44 have a fixing portion 60 consisting of flat plate portions 61 to 63, a leaf spring portion 70 connected to the fixing portion 60, and a connection portion 80 consisting of tabs 81 and 82, and can be produced by punching a metal plate made of copper (Cu) or the like and then bending the metal plate. The main surfaces of the flat plate portions 61 and 62 and the leaf spring portion 70 are the xy plane, and the main surface of the flat plate portion 63 is the xz plane.

The flat plate portion 61 and the flat plate portion 62 forming the fixed portion 60 are parallel to each other, and the distance between the flat plate portion 61 and the flat plate portion 62 is substantially the same as the thickness of the first plate member 20 at the portion where the grooves 25 and 26 are provided. The flat plate portion 63 is a portion that connects the flat plate portion 61 and the flat plate portion 62 and extends perpendicularly to the flat plate portions 61 and 62 . The leaf spring portion 70 is connected to the flat plate portion 62 of the fixed portion 60 and extends parallel to the flat plate portion 61 . The interval between the leaf spring portion 70 and the flat plate portion 61 is greater than the thickness of the first plate-like member 20 at the portions where the grooves 25 and 26 are provided.

With such a configuration, for example, when the terminal fitting 41 is attached to the first plate member 20, as shown in FIG. As a result, the terminal fitting 41 is fitted to the first plate-like member 20 so that the first plate-like member 20 is sandwiched therebetween. In order to fix the terminal fitting 41 and the first plate-shaped member 20 more strongly, an adhesive may be interposed between the terminal fitting 41 and the first plate-shaped member 20 . In this case, it is preferable to bond the flat plate portion 61 and the upper surface 21 of the first plate member 20 with an adhesive, and bond the flat plate portion 63 and the side surface 23 of the first plate member 20 with an adhesive. According to this, since the adhesive is provided in the portion having a large facing area, sufficient adhesive strength can be ensured. Although only the terminal fitting 41 is illustrated in FIG. 8, the other terminal fittings 42 to 44 are the same.

Further, as shown in FIG. 8, the leaf spring portion 70 is held by the flat plate portion 62 in a state in which it is separated from the lower surface 22 of the first plate-like member 20 by a predetermined distance in the z direction without contacting the first plate-like member 20. The plate spring portion 70 is a portion that is connected via solder to the land pattern provided on the mounting substrate 8 shown in FIG. As described above, in the present embodiment, the leaf spring portion 70 is connected to the land pattern, thereby imparting springiness to the mechanical connection between the mounting substrate 8 and the coil component 1. Therefore, even if the mounting substrate 8 is deformed such as by bending, the stress applied to the first plate-shaped member 20 is not directly transmitted to the first plate-shaped member 20, but is transmitted through the terminal fittings 41 to 44 having springiness.

The tabs 81 and 82 that make up the connecting wire portion 80 can be bent inward. Before being completely bent, the ends of the wires W1 and W2 are arranged in the area surrounded by the flat plate portion 63 and the tabs 81 and 82. By bending the tabs 81 and 82 inward in this state, the ends of the wires W1 and W2 can be sandwiched between the flat plate portion 63 and the tabs 81 and 82 and fixed to the terminal fittings 41 to 44. After the ends of the wires W1 and W2 are sandwiched between the flat plate portion 63 and the tabs 81 and 82, the ends of the wires W1 and W2 and the tabs 81 and 82 may be welded.

As described above, in the coil component 1 according to the present embodiment, the width of the first plate member 20 in the y direction is reduced in the region A2 where the terminal fittings 41 to 44 are fixed. Therefore, even though the terminal fittings 41 to 44 are fixed to the side surfaces 23 and 24, the terminal fittings 41 to 44 and the wires W1 and W2 can be reduced in the y direction, and preferably, the terminal fittings 41 to 44 and the wires W1 and W2 can be prevented from projecting in the y direction. becomes.

Moreover, although the first plate-like member 20 constitutes the mounting surface, the terminal fittings 41 to 44 fixed to the first plate-like member 20 have spring properties. Therefore, even if a fragile material such as ferrite is used as the material for the first plate-like member 20, it is possible to prevent the first plate-like member 20 from being damaged due to the deformation of the mounting substrate 8.

FIG. 9 is a plan view of a plate member 20A according to the first modification. A plate-like member 20A shown in FIG. 9 is different from the above-described plate-like member 20 in that the width D3 in the central region A3 is equal to the width D0 in the region A0. As illustrated by the plate member 20A shown in FIG. 9, in the present invention, it is not essential that the width D3 in the central region A3 is narrower than the width D0 in the region A0.

FIG. 10 is a plan view of a plate member 20B according to a second modification. A plate-like member 20B shown in FIG. 10 is different from the above-described plate-like member 20 in that the width D3 in the central region A3 is equal to the width D2 in the region A2. As illustrated by the plate member 20B shown in FIG. 10, in the present invention, it is not essential that the width D3 in the central region A3 is wider than the width D2 in the region A2.

FIG. 11 is a plan view of a plate member 20C according to a third modification. A plate-like member 20C shown in FIG. 11 is different from the above-described plate-like member 20 in that the width D0 in the area A0 is equal to the width D3 in the area A3. That is, the width D0 in the region A0 is smaller than the width D1 of the flanges 11 and 12 in the y direction. As illustrated by the plate member 20C shown in FIG. 11, in the present invention, it is not essential that the width D0 in the region A0 is the same as the width D1 of the flanges 11 and 12 in the y direction.

Although the preferred embodiments of the present invention have been described above, it goes without saying that the present invention is not limited to the above-described embodiments, and that various modifications are possible without departing from the gist of the present invention, and these are also included within the scope of the present invention.

For example, in the above embodiment, the terminal electrodes on which the ends of the wires W1 and W2 are formed are configured by terminal metal fittings, but the use of terminal metal fittings is not essential in the present invention. However, by using terminal metal fittings as terminal electrodes, it is possible to further improve connection reliability between wires and terminal electrodes.

Further, in the above embodiment, the second plate-like member 30 is used to cover the magnetic core 10 from above, but the use of such a plate-like member 30 is not essential in the present invention. However, by using such a plate-shaped member 30, not only is it possible to further improve reliability, but also the second plate-shaped member 30 can be sucked using a picking tool in the mounting process, which facilitates handling of the coil component.

1 Coil component 8 Mounting board 10 Magnetic core 11 First flange 12 Second flange 13 Winding core 20, 20A-20C First plate-like member 21 Upper surface 22 Lower surface 23, 24 Side surface 25, 26 Groove 30 Second plate-like member 31 Lower surface 32 Upper surface 41-44 Terminal fittings 51-54 Adhesive 60 Fixing parts 61-63 Flat plate 70 Leaf spring portion 80 Connecting wire portions 81, 82 Tabs L1 to L4 Power supply lines W1, W2 Wires W1a, W2a One end of wire W1b, W2b The other end of wire

Claims (7)

a magnetic core having a winding core having a first direction as an axial direction, a first flange positioned on one end side of the winding core in the first direction, and a second flange positioned on the other end side of the winding core in the first direction;
first and second wires wound around the winding core;
a first plate member fixed to the first and second flanges so as to cover the magnetic core from one side in a second direction orthogonal to the first direction;
first and second terminal electrodes fixed to the first plate-shaped member at positions not overlapping the first and second flanges, and having one end and the other end of the first wire connected to each other;
third and fourth terminal electrodes fixed to the first plate-shaped member at positions not overlapping the first and second flanges, and having one end and the other end of the second wire connected, respectively;
The first plate-shaped member has an upper surface facing the magnetic core, a lower surface located opposite to the upper surface, and first and second side surfaces extending in the first and second directions and located opposite to each other,
The upper surface of the first plate-like member has first and second portions to which the first and second flanges are respectively fixed, first and second grooves positioned between the first portion and the second portion and extending in a third direction orthogonal to the first and second directions, and a central region positioned between the first groove and the second groove,
The first terminal electrode is provided on the first side surface and comprises a terminal fitting sandwiching the first groove portion and the lower surface,
the second terminal electrode is provided on the second side surface and comprises a terminal fitting sandwiching the first groove portion and the lower surface;
the third terminal electrode is provided on the first side surface and comprises a terminal fitting sandwiching the second groove portion and the lower surface;
the fourth terminal electrode is provided on the second side surface and comprises a terminal fitting sandwiching the second groove portion and the lower surface;
Widths in the third direction of the first and second collar portions are a first width,
the width in the third direction of the first plate member in the first and second grooves is a second width narrower than the first width;
A coil component, wherein the width in the third direction of the first plate-shaped member in the central region is a third width that is wider than the second width and narrower than the first width. 2. The coil component according to claim 1, wherein a width of said first plate member in said first and second portions in said third direction is wider than said second width. The terminal fitting has a fixing portion fixed to the first plate-like member, and a leaf spring portion connected to the fixing portion without being in contact with the first plate-like member,
The fixing portion includes a first flat plate portion in contact with the upper surface of the first plate-shaped member, a second flat plate portion in contact with the lower surface of the first plate-shaped member, and a third flat plate portion connecting the first flat plate portion and the second flat plate portion,
3. The coil component according to claim 1 , wherein the leaf spring portion is held by the second flat plate portion while being separated from the lower surface of the first plate member by a predetermined distance in the second direction. The terminal fitting further has a connecting wire portion connected to the third flat plate portion,
4. The coil component according to claim 3, wherein one end and the other end of said first and second wires are fixed so as to be sandwiched between said third flat plate portion and said connecting wire portion. 5. The coil component according to claim 1, wherein said first plate member is made of a magnetic material. The coil component according to any one of claims 1 to 5 , further comprising a second plate member fixed to the first and second flanges so as to cover the magnetic core from the other side in the second direction. 7. A coil component according to claim 6 , wherein said second plate member is made of a magnetic material.

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