Coil component and method for manufacturing coil component

Abstract

A base (30) is provided with a pedestal part (36) and a standing part (38). Terminal members (40) are disposed at the pedestal part (36). A coil (20) or a core (10) is placed on the pedestal part (36). The standing part (38) is disposed standing to intersect a surface of the pedestal part (36) in the standing direction. In the base (30), the pedestal part (36) and the standing part (38) are integrally formed. One end surface of each of a plurality of coils (20) faces an opposite surface (38a) which is a side surface of the standing part (38).

Description

Coil component and method for manufacturing the same

[0001] The present invention relates to a coil component and a method for manufacturing such a coil component.

[0002] Some coil components are manufactured by arranging multiple coils and multiple cores on a base portion formed of resin or the like. Regarding this type of technology, Patent Document 1 below discloses a coil component (composite component (100)) in which E-shaped cores (20A, 20B) and coils (30A, 30B) are arranged on a resin base (10). Specifically, a first coil (30A) is arranged to fit into a metal terminal (14A). The metal terminal (14A) is composed of a bottom surface portion (14A1), and a side surface portion (14A2) and a pressing portion (14A3) that stand up from the bottom surface portion (14A1). A second coil (30B) is similarly arranged to fit into a metal terminal (14C).

[0003] Japanese Patent Application Laid-Open No. 2020-174112

[0004] When placing the coils (30A, 30B) in the resin base (10) of Patent Document 1, it is necessary to align the coils (30A, 30B) with predetermined positions in the resin base (10) so that the coils (30A, 30B) fit into the metal terminals (14A, 14C). This need to position the coils (30A, 30B) in desired positions can make manufacturing the coil component difficult. For example, a step of aligning the positions of the coils (30A, 30B) in the resin base (10) is required before placing the coils (30A, 30B) in the resin base (10), which increases the number of steps required for manufacturing.

[0005] The present invention has been made in view of the above-mentioned problems, and aims to provide a coil component that is easy to manufacture.

[0006] The coil component of the present invention has two or more cores, two or more coils each spirally arranged around at least a portion of the cores, and a base portion that holds the coils and the cores and has terminal members arranged thereon, wherein the base portion has a base portion on which the terminal members are arranged and on which the coils or the cores are placed, and an upright portion that is arranged upright so as to intersect with the surface of the base portion in an upright direction, the base portion and the upright portion are formed integrally, and one end face of each of the plurality of coils faces an opposing surface that is a side surface of the upright portion.

[0007] The method for manufacturing a coil component of the present invention is a method for manufacturing a coil component having two or more cores, two or more coils arranged in a spiral around at least a portion of the core, and a base portion that holds the coils and the cores and on which terminal members are arranged, wherein the base portion comprises a pedestal portion on which the terminal members are arranged and on which the coils and the cores are placed, and an upright portion that is arranged upright so as to intersect with the surface of the pedestal portion in an upright direction, the pedestal portion and the upright portion being formed integrally, and the method includes a coil attachment step in which the coil is attached to the base portion by moving the coil toward the opposing surface, which is the side surface of the upright portion, in an orientation where one end face of the coil faces the opposing surface.

[0008] When manufacturing the coil component of the present invention, the coil is placed on the base portion with its end face facing the side of the upstanding portion. In this case, the coil is moved axially to be placed on the base portion, but the presence of the upstanding portion on the base portion prevents the coil from accidentally moving beyond the side of the upstanding portion. That is, the upstanding portion assists in aligning the coil. In other words, the number of steps required to align the coil on the base portion before placing the coil on the base portion can be reduced. Furthermore, because the upstanding portion and the pedestal portion are integrally formed, the need to adjust the position of the upstanding portion on the pedestal is eliminated.

[0009] According to the coil component of the present invention, the coil can be easily positioned on the base by aligning the end face of the coil with the side face of the upstanding portion. Furthermore, since the upstanding portion is formed integrally with the pedestal, the process of aligning and attaching the upstanding portion to the pedestal is not required. This makes it possible to provide a coil component that is easy to manufacture.

[0010] The above-mentioned objects, as well as other objects, features and advantages, will become more apparent from the preferred embodiments described below and the accompanying drawings.

[0011] 6(a) is a perspective view showing an example of a coil component according to a first embodiment of the present invention; FIG. 6(b) is an exploded perspective view of the coil component according to the first embodiment; FIG. 6(c) is a right side view of the coil component according to the first embodiment; FIG. 6(d) is an exploded perspective view of the coil component according to the first embodiment; FIG. 6(e) is a right side view of the coil component according to the first embodiment; FIG. 6(f) is an exploded perspective view of the coil component according to the first embodiment; FIG. 6(f) is an exploded perspective view of the coil component according to the first embodiment; FIG. 6(f) is an exploded perspective view of the coil component according to the first embodiment; FIG. 6(f) is an exploded perspective view of the coil component according to the first embodiment;

[0012] The various components of the coil component of the present invention do not need to be independent entities, and it is acceptable for multiple components to be formed as a single member, for one component to be formed from multiple members, for one component to be part of another component, or for part of one component to overlap with part of another component. Furthermore, although the manufacturing method of the present invention may be described using multiple steps listed in order, the order of the descriptions does not limit the order or timing of performing the multiple steps. Therefore, when implementing the manufacturing method of the present invention, the order of the multiple steps can be changed to the extent that it does not cause any problems in terms of the content, and some or all of the timing of performing the multiple steps may overlap with each other.

[0013] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each drawing, corresponding components are designated by the same reference numerals, and redundant descriptions will be omitted where appropriate. In this embodiment, the front-rear, left-right, top-bottom directions will be defined as illustrated. However, these definitions are provided for convenience in order to easily explain the relative relationships between components, and do not limit the directions during manufacture or use of a product embodying the present invention. In this embodiment, the top-bottom direction refers to a direction perpendicular to the surface of a mounting board when a coil component is mounted on the mounting board. When a coil component is mounted on a horizontal mounting board, the top-bottom direction coincides with the vertical direction. However, when a coil component is mounted on an inclined mounting board, the top-bottom direction is inclined relative to the vertical direction. The front-rear and left-right directions may also be referred to as lateral directions. In this embodiment, the front-rear direction coincides with the axial direction of the coil. Furthermore, the left-right direction may also be referred to as the width direction of the coil component, and the top-bottom direction may also be referred to as the height direction of the coil component or a member of the coil component. Furthermore, the term "plane" as used herein refers to a shape that is physically formed with a flat surface as the target, and naturally does not necessarily have to be a perfect geometric plane.

[0014] First Embodiment (Coil Component) FIG. 1 is a perspective view showing an example of a coil component 1 according to a first embodiment of the present invention.

[0015] First, an overview of the coil component 1 of this embodiment will be described. The coil component 1 has two or more cores 10 (first core 11 and second core 12), two or more coils 20 (first coil 21 and second coil 22), and a base portion 30. The two or more coils 20 are each spirally arranged around at least a portion of the cores 10. The base portion 30 holds the coils 20 and the cores 10. Terminal members 40 are also arranged on the base portion 30. The base portion 30 includes a pedestal portion 36 and a rising portion 38. The terminal members 40 are arranged on the pedestal portion 36. The coils 20 or the cores 10 are also placed on the pedestal portion 36. The rising portion 38 is arranged to stand upright so as to intersect with the surface of the pedestal portion 36 in the rising direction (vertical direction). Furthermore, the pedestal portion 36 and the rising portion 38 are integrally formed on the base portion 30. Furthermore, one end surface (inner end surfaces 21 a, 22 a) of each of the multiple coils 20 faces opposing surfaces 38 a (first opposing surface 38 a1 and second opposing surface 38 a2), which are side surfaces of the standing portions 38. When manufacturing the coil component 1 of the present invention, the coil 20 is placed on the base portion 30 with the inner end surface 21 a of the coil 20 facing the side surfaces (opposing surfaces 38 a) of the standing portions 38. In this case, the coil 20 is placed on the base portion 30 by moving it in the axial direction of the coil 20, but the provision of the standing portions 38 on the base portion 30 prevents the coil 20 from accidentally moving beyond the side surfaces of the standing portions 38. In other words, the standing portions 38 assist in aligning the coil 20. For example, as will be described later, when the coil 20 is inserted into the base portion 30, the coil 20 is inserted into the base portion 30 until the inner end surfaces 21 a, 22 a of the coil 20 abut against the side surfaces of the standing portions 38, and the position of the coil 20 is naturally determined by the position of the standing portions 38. Even when the coil 20 is inserted into the base portion 30 just before the inner end surfaces 21 a, 22 a of the coil 20 abut against the side surfaces of the standing portions 38, the provision of the standing portions 38 prevents the coil 20 from being accidentally inserted too far into the base portion 30. In other words, the number of steps for aligning the position of the coil 20 on the base portion 30 before placing the coil 20 on the base portion 30 can be reduced.Furthermore, since the upstanding portion 38 and the base portion 36 are integrally formed, there is no need to adjust the position of the upstanding portion 38 on the base portion 36. This makes it possible to provide a coil component 1 that is easy to manufacture.

[0016] Next, the coil component 1 of this embodiment will be described in detail. The coil component 1 is an electronic component having a coil 20. An electronic component is a component that can constitute part of an electronic circuit. Examples of the coil component 1 include a transformer, an antenna, and an inductor. The coil component 1 of this embodiment is mounted on a mounting substrate (not shown) so that the mounting surfaces of terminal members 40, which will be described later, are in contact with the mounting surfaces.

[0017] The coil 20 is a component formed by helically arranging a conductive material. In this embodiment, the coil 20 is an edgewise coil formed by helically arranging flat wires with a flat cross section (rectangular or elliptical cross section). The coil 20 may be formed from a round wire with a circular cross section. The manufacturing method of the coil 20 is not limited, and any conductive material formed in a helical shape may be used. That is, the coil 20 may be formed by helically arranging a conductive material so that the core portion is hollow. In this case, after the coil is formed, the core 10 may be inserted into the hollow portion of the coil. The inner surface of the winding portion 28 (the circumferential surface of the flat wire) and the core 10 (particularly the circumferential surface of the leg portion 13 described below) may be separated or in contact with each other. Alternatively, the coil 20 may be formed by winding a conductive material (coil wire) around the core 10. In this case, the coil wire of the coil 20 may be in pressure contact with or abut against the core 10 (particularly the leg portion 13). The coil wire may be embedded in the core 10. In this embodiment, the coil device 1 has two coils 20 (a first coil 21 and a second coil 22). In this embodiment, the spiral direction of the first coil 21 relative to its axial direction (left-handed screw direction = counterclockwise) is opposite to the spiral direction of the second coil 22 relative to its axial direction (right-handed screw direction = clockwise). Alternatively, the spiral direction of the first coil 21 relative to its axial direction and the spiral direction of the second coil 22 relative to the axial direction of the second coil 22 may be the same. In the spiral shape of the coil 20, the direction in which the central axis of the spiral shape extends is referred to as the axial direction of the coil 20, or simply the axial direction. In this embodiment, both the axial direction of the first coil 21 and the axial direction of the second coil 22 coincide with the front-to-rear direction.

[0018] As shown in FIG. 2 , the coil 20 in this embodiment has a winding portion 28 and two lead-out portions 26 (a first lead-out portion 26 a and a second lead-out portion 26 b). The winding portion 28 is a portion of the coil 20 that has a spiral shape. The lead-out portion 26 is a part of the coil 20 that is led out from the winding portion 28. The lead-out portion 26 also forms one end of the conductive material (flat wire) that forms the coil 20. In this embodiment, both ends of the flat wire are led out from the winding portion 28, and the coil 20 has two lead-out portions 26 (the first lead-out portion 26 a and the second lead-out portion 26 b). In this embodiment, as shown in FIG. 3 , the lead-out portions 26 (the first lead-out portion 26 a (see FIG. 2 ) and the second lead-out portion 26 b) extend downward from both axial ends of the coil 20 (the winding portion 28). That is, a base end 26d (a part of the base end side and also a part on the inner side of the base portion 30), which is a part of the lead portion 26, extends in the vertical direction. The base end 26d may extend in any direction having a vertical component greater than a horizontal component. That is, the base end 26d may extend parallel to the vertical direction or may extend at an angle relative to the vertical direction. The lead portion 26 is also bent (bent) at a bent portion 26c disposed midway. A tip end 26e (a part of the tip side and also a part on the outer side of the base portion 30), which is a part of the lead portion 26, extends in a substantially horizontal direction (particularly, the front-rear direction). More specifically, the lead portion 26 (tip end 26e) extends in the axial direction (front-rear direction) of the coil 20 along the surface of the pedestal portion 36 (the bottom surface of the terminal placement recess 36i, which will be described later), as will be described later.

[0019] As described above and illustrated in Fig. 4, the coil 20 (winding portion 28) is arranged in a spiral shape around at least a portion of the core 10. In this embodiment, the leg portion 13 (described later) of the core 10 is arranged in the center of the winding portion 28.

[0020] The core 10 is a member made of a magnetic material. In this embodiment, the core 10 is a so-called PQ core, as described below. The core 10 may be a so-called I core, E core, U core, or other shaped core. Although the multiple cores 10 have the same shape in this embodiment, the multiple cores 10 may alternatively have different shapes. In this embodiment, the multiple cores 10 are combined to form a closed magnetic circuit. Specifically, in this embodiment, the first core 11 and the second core 12 are arranged so that the end faces of their respective leg portions 13 (described later) are adjacent to each other and so that the end faces of their respective side wall portions 16 are adjacent to each other. Furthermore, in this embodiment, as shown in FIG. 4 , the end faces of the side wall portions 16 of the first core 11 and the second core 12 are in contact with each other. Furthermore, the end faces of the leg portions 13 of the first core 11 and the leg portions 13 of the second core 12 are in contact with each other. Instead of this embodiment, a gap may be formed between the end face of the side wall portion 16 of the first core 11 and the end face of the side wall portion 16 of the second core 12, or a gap may be formed between the end face of the leg portion 13 of the first core 11 and the end face of the leg portion 13 of the second core 12.

[0021] In this embodiment, as shown in FIG. 2 , the core 10 has an overall rectangular parallelepiped shape. The core 10 has a side wall portion 16, an outer placement portion 15, a hollow portion 14, and legs 13. The core 10 covers at least a portion of the circumferential surface 24 of the coil 20. The side wall portion 16 is a portion that covers (encloses) a portion of the circumferential surface 24 of the coil 20 (winding portion 28). In this embodiment, two side wall portions 16 are arranged, one on each side of the core 10 in the left-right direction. The side wall portion 16 is arranged around a portion of the circumferential surface of the winding portion 28 that faces laterally (facing left-right). The outer placement portion 15 is a portion that is arranged outward of the base portion 30 in the axial direction. The main surface of the outer placement portion 15 faces one end face (outer end face) of the coil 20. The hollow portion 14 is defined by the side wall portion 16 and the outer placement portion 15. The hollow portion 14 can also be considered the internal space of the core 10. In other words, the core 10 has a recess that opens to the side and has the outer placement portion 15 as its bottom. The internal space of the recess can also be considered the hollow portion 14. The hollow portion 14 accommodates the coil 20 (particularly the winding portion 28). The entire coil 20 may be disposed in the hollow portion 14, or only a portion of the coil 20 may be disposed in the hollow portion 14, with the other portion of the coil 20 disposed outside the hollow portion 14 (e.g., outside the core 10). In this embodiment, a portion of the upright portion 38 is disposed in the hollow portion 14 of the core 10. The leg portion 13 is a columnar portion formed to protrude in the front-to-rear direction from the outer placement portion 15 (toward the interior of the base portion 30). The leg portion 13 is disposed inside the winding portion 28 of the coil 20.

[0022] As shown in FIG. 4 , the base portion 30 is a member that holds the coil 20 and the core 10. The base portion 30 is formed of an insulating material. In this embodiment, the base portion 30 is formed of resin. The base portion 30 holds the coil 20 and the core 10 directly or indirectly. The base portion 30 holding the coil 20 and the core 10 means that the base portion 30 directly or indirectly supports the coil 20 or the core 10. In this embodiment, the base portion 30 directly holds the core 10. Specifically, the core 10 is directly placed on the base portion 30 (particularly the pedestal portion 36), and the core 10 is supported by the base portion 30. Alternatively, the core 10 may be indirectly held by the base portion 30 via another member. On the other hand, in this embodiment, the base portion 30 indirectly holds the coil 20. Specifically, the coil 20 is held by the base portion 30 via a terminal member 40, which will be described later. Specifically, the coil 20 is placed on a terminal member 40 that connects (couples) to the base portion 30, and is connected (fixed) to the terminal member 40. Alternatively to this embodiment, the terminal member 40 may be placed on the base portion 30, or may be held directly by the base portion 30.

[0023] The pedestal portion 36 is a portion on which the coil 20, the core 10, or both are mounted. As shown in FIG. 4 , in this embodiment, the core 10 is mounted on the pedestal portion 36. More specifically, the pedestal portion 36 has a pair of elevated portions 36j at both ends in the left-right direction. The core 10 is mounted on the upper surface of the elevated portions 36j. The coil 20 is disposed on terminal members 40 (described later) and is indirectly supported by the pedestal portion 36 via the terminal members 40. As shown in FIG. 2 , the pedestal portion 36 in this embodiment is a substantially flat portion extending horizontally. In other words, the pedestal portion 36 is a member that includes the lower surface portion of the base portion 30.

[0024] As shown in FIG. 2 , the upright portions 38 rise in a rising direction (vertical direction) intersecting the surface of the base portion 36. Here, the surface of the base portion 36, which the extending direction of the upright portions 38 intersects, may be the imaginary upper surface (the main surface facing upward) of the base portion 36, which has a substantially flat plate shape extending horizontally. The upright portions 38 may rise perpendicular to the surface of the base portion 36 or may rise obliquely. In this embodiment, the upright portions 38 rise in the vertical direction. In this embodiment, the upright portions 38 are formed so as to protrude upward from the center of the base portion 36. Specifically, the upright portions 38 are disposed in the center of the base portion 36 in the front-rear direction. Alternatively, the upright portions 38 may be disposed on the periphery of the base portion 36. Furthermore, the upright portions 38 in this embodiment are flat plate portions having main surfaces facing the front-rear direction. Alternatively, the upright portions 38 may have a columnar shape.

[0025] The base portion 30 being formed integrally with the pedestal portion 36 and the upright portions 38 means that the pedestal portion 36 and the upright portions 38 are seamlessly formed from the same material. More specifically, the pedestal portion 36 and the upright portions 38 in this embodiment are simultaneously formed by pouring resin into a single mold.

[0026] The terminal member 40 is an electrode member electrically connected to the coil 20 (particularly, the end of the lead portion 26). The terminal member 40 serves as an input electrode or an output electrode of the coil component 1. The terminal member 40 is formed of a conductive material such as metal. Phosphor bronze is an example of a metal that can form the terminal member 40. In this embodiment, the terminal member 40 is formed by bending a flat plate made of a conductive material. Alternatively, the terminal member 40 may be formed into a shape having a bent portion by pouring molten metal into a molding die or the like. As described below, the terminal member 40 is disposed on the base portion 30 such that the hook portion is hooked onto a portion of the base portion 30 (a portion of the pedestal portion 36). Alternatively, the terminal member 40 may be embedded in the base portion 30 or may be fixed with an appropriate adhesive or the like. In this embodiment, the coil component 1 is mounted on the mounting substrate by grounding the lower surface of the terminal member 40 (the lower surface of the first hook portion 42 described below) to the mounting substrate.

[0027] As shown in FIG. 3 , the inner end surfaces 21a, 22a of each of the multiple coils 20 face the first opposing surface 38a1 or the second opposing surface 38a2, respectively. The end surfaces of the coil 20 are imaginary surfaces facing the axial direction at the end portions of the coil 20 in the axial direction. The inner end surfaces 21a, 22a of the coil 20 are the end surfaces of the coil 20 that face the center of the base portion 30 (the side of the upright portion 38). Meanwhile, the first opposing surface 38a1 and the second opposing surface 38a2 are part of the surface (side surface) of the upright portion 38 that faces laterally. In this embodiment, the first opposing surface 38a1 and the second opposing surface 38a2 are the surfaces (main surfaces) of the upright portion 38 that face the front-to-rear direction. The opposing surfaces 38a may be flat or curved. The opposing surface 38a of the standing portion 38 and the inner end surfaces 21a, 22a of the coil 20 do not necessarily have to be parallel to each other. It is sufficient that the opposing surface 38a of the standing portion 38 and the inner end surfaces 21a, 22a of the coil 20 overlap in a predetermined direction (e.g., the front-to-rear direction). In this embodiment, the first opposing surface 38a1 and the second opposing surface 38a2 are arranged along each other. That is, the first opposing surface 38a1 and the second opposing surface 38a2 are arranged substantially parallel to each other. In this case, the axial direction of the first coil 21 and the axial direction of the second coil 22 are substantially parallel to each other. Furthermore, in this embodiment, the inner end surface 21a of the first coil 21 and the inner end surface 22a of the second coil 22 are opposed to each other across the standing portion 38. That is, the inner end surface 21a of the first coil 21 faces the inner end surface 22a of the second coil 22 in the axial direction (front-to-rear direction) of the first coil 21. In other words, when viewed in the front-rear direction, at least a portion of the inner end surface 21 a of the first coil 21 and at least a portion of the inner end surface 22 a of the second coil 22 overlap. More specifically, in this embodiment, the axial centers of the first coil 21 and the second coil 22 are arranged on the same straight line. In addition, in this embodiment, the opposing surface 38 a of the standing portion 38 and the inner end surfaces 21 a, 22 a of the coils may be in contact with each other or may be spaced apart from each other.

[0028] The shape of the standing portion 38 is not limited to the above-described shape, and the relative positions of the standing portion 38 and the two coils 20 are not limited to the above-described shape. Instead of this embodiment, the first opposing surface 38a1 and the second opposing surface 38a2 may be arranged to intersect with each other. For example, if the standing portion 38 has a rectangular prism shape, each of the adjacent side surfaces may be the first opposing surface 38a1 or the second opposing surface 38a2. In this case, the two coils 20 are arranged so that their axial directions intersect (for example, at 90 degrees). Alternatively, a portion of one main surface of the standing portion 38 facing laterally may be the first opposing surface 38a1, and the other portion may be the second opposing surface 38a2. In this case, the two coils 20 are arranged side by side. Furthermore, instead of this embodiment in which the two coils 20 are arranged coaxially, the respective axial centers of the two coils 20 may be offset in the left-right or up-down direction.

[0029] As shown in FIG. 3 , in this embodiment, the base portion 30 is provided with a locking portion 32. The locking portion 32 is disposed axially between the first core 11 (its side wall portion 16) and the second core 12 (its side wall portion 16). When the first coil 21 and the second coil 22 are disposed in the base portion 30 of this embodiment, the first coil 21 and the second coil 22 are inserted into the base portion 30 from one side to the other in the axial direction (forward or backward). Because the locking portion 32 is disposed between the first coil 21 and the second coil 22 in the axial direction, when the first coil 21 and the second coil 22 are inserted into the base portion 30 in the axial direction, they abut against the locking portion 32 and stop the insertion. In other words, the locking portion 32 can determine the position of the first coil 21 and the second coil 22 during the process of inserting the coil 20 into the base portion 30.

[0030] The locking portion 32 is a portion or member capable of locking the movement of the first core 11 and the second core 12 in the axial direction. That is, the locking portion 32 overlaps with at least a portion of the first core 11 and at least a portion of the second core 12 in the axial direction. In this embodiment, the locking portion 32 is formed on the base portion 30 adjacent to the upright portion 38 and the plateau portion 36j of the pedestal portion 36. More specifically, the pedestal portion 36 protrudes in the left-right direction from the upright portion 38 and also protrudes upward from the plateau portion 36j. Alternatively, the locking portion 32 may be formed in another location on the base portion 30. For example, the locking portion 32 may be formed on a portion of the upper side of the upright portion 38 so as to protrude outward in the left-right direction from the upright portion 38. Alternatively, the locking portion 32 may be formed so as to protrude upward from a portion of the outer side of the pedestal portion 36 in the left-right direction.

[0031] In this embodiment, the core 10 (particularly the side wall portion 16) has a recess (accommodating recess 17) into which the locking portion 32 can fit. The accommodating recess 17 is formed by recessing an end of the core 10 (one end on the inner side of the base portion 30 in the front-to-rear direction) toward the outside of the base portion 30 in the front-to-rear direction. Here, the outer side of the base portion 30 in a predetermined direction (particularly the front-to-rear direction) refers to the peripheral side of the base portion 30 in the predetermined direction, and the inner side of the base portion 30 in the predetermined direction refers to the center side of the base portion 30 in the predetermined direction. In this embodiment, the accommodating recess 17 is formed at the bottom end of the core 10, opening toward the inside of the base portion 30. Furthermore, the accommodating recess 17 in this embodiment also opens downward. At least a portion of the locking portion 32 is disposed within the accommodating recess 17. In this embodiment, a portion of the locking portion 32 is disposed in the accommodating recess 17 of the first core 11, and another portion is disposed in the accommodating recess 17 of the second core 12. As a result, the entire locking portion 32 is disposed in the space formed by the accommodating recess 17 of the first core 11 and the accommodating recess 17 of the second core 12. As described above, the core 10 (first core 11 and second core 12) has the accommodating recess 17 that can fit with the locking portion 32, so that the first core 11 and the second core 12 are brought into contact with each other, and the locking portion 32 can be disposed between the first core 11 and the second core 12 without interfering with the first core 11 and the second core 12.

[0032] A part of the surface of the core 10 is an abutment surface 17a that defines the accommodating recess 17. The abutment surface 17a is a surface of the surface of the core 10 that defines the accommodating recess 17 that faces the locking portion 32 in the axial direction (front-rear direction). The abutment surface 17a may be in contact with the locking portion 32 or may be spaced apart from the locking portion 32 in the front-rear direction. Here, the abutment surface 17a is a surface that faces the inward side of the base portion 30 in the front-rear direction and may be a curved surface or a flat surface. Furthermore, the surface of the locking portion 32 that faces the abutment surface 17a may be a curved surface or a flat surface. As shown in FIG. 3 , in this embodiment, the abutment surface 17a of the first core 11 and the locking portion 32 are spaced apart in the front-rear direction, and the abutment surface 17a of the second core 12 and the locking portion 32 are also spaced apart in the front-rear direction. More specifically, the distance in the front-rear direction between the abutment surface 17a of the first core 11 and the locking portion 32 is the same as the distance in the front-rear direction between the abutment surface 17a of the second core 12 and the locking portion 32. That is, the first core 11 and the second core 12 are disposed at the center of the base portion 30. Alternatively, the first core 11 and the second core 12 may be disposed so as to be offset from each other in the front-rear direction rather than being equidistant from the center of the base portion 30. For example, the distance in the front-rear direction between the abutment surface 17a of the first core 11 and the locking portion 32 may be greater than the distance in the front-rear direction between the abutment surface 17a of the second core 12 and the locking portion 32. Alternatively, the abutment surface 17a of the first core 11 and the locking portion 32 may be separated from each other in the front-rear direction, and the abutment surface 17a of the second core 12 and the locking portion 32 may be in contact (abut) with each other. By arranging the first core 11 and the second core 12 with a shift in the front-to-rear direction in this manner, it is possible to reduce manufacturing errors in the arrangement positions of the first core 11 and the second core 12 between the coil components 1. The position where the locking portion 32 is formed may be different from that of the present embodiment as long as it is between the first core 11 and the second core 12. For example, the locking portion 32 may be formed as a protrusion that protrudes in the left-right direction from the upright portion 38 and is spaced apart from the base portion 36. Alternatively, the locking portion 32 may be formed as a protrusion that protrudes upward from the base portion 36 (e.g., the elevated portion 36j) and is spaced apart from the upright portion 38.

[0033] In this embodiment, as shown in FIG. 2 , the base portion 30 further includes a top plate portion 34. The top plate portion 34 is disposed so as to sandwich the upright portion 38 between the base portion 36 and the top plate portion 34 in the upright direction (vertical direction). That is, the top plate portion 34 is formed adjacent to the upper end of the upright portion. The top plate portion 34 is formed integrally with the upright portion 38. That is, there is no seam between the top plate portion 34 and the upright portion 38, and the top plate portion 34 and the upright portion 38 are formed from the same material. Also, as shown in FIG. 5 , the top plate portion 34 covers at least a portion of the core 10 when viewed from the top plate portion 34 side (upper side) in the upright direction (vertical direction). The top plate portion 34 provides excellent protection for the core 10. As will be described later, the top surface of the top plate portion 34 is flat. Since the top surface of the top plate portion 34, which is the top surface of the coil component 1, is a flat surface, the coil component 1 can be transported by adsorbing the flat surface with a mounter or the like.

[0034] In this embodiment, the top plate portion 34 has a flat plate shape extending in the horizontal direction. That is, the top plate portion 34 is disposed approximately parallel to the base portion 36. Furthermore, the extension direction of the top plate portion 34 and the upright direction of the upright portion intersect. The top plate portion 34 covering at least a portion of the core 10 when viewed from above means that at least a portion of the top plate portion 34 overlaps with at least a portion of the core 10 in the upright direction (vertical direction). In this embodiment, the top plate portion 34 covers at least a portion of the first core 11 and at least a portion of the second core 12. In this embodiment, the main surface (top surface) of the top plate portion 34 facing upward is flat. Furthermore, the shape of the top plate portion 34 when viewed in the vertical direction is rectangular. Furthermore, the rectangular shape of the top plate portion 34 when viewed in the vertical direction has a shape and dimensions smaller than the rectangular shape of the base portion 36 when viewed in the vertical direction.

[0035] As shown in FIGS. 6( a) and 6(b), a first groove 38a3 is formed in the opposing surface 38a of the upright portion 38. The first groove 38a3 extends in the upright direction (vertical direction). The first groove 38a3 extends from the interior of a region (opposing region 38a4) of the opposing surface 38a that faces the inner end surfaces 21a and 22a of the coil to the periphery of the opposing region 38a4. Forming the first groove 38a3 facilitates assembly of the coil component 1. Specifically, when the core 10 is placed on the base portion 30 in which the coil 20 is placed, inserting the coil 20 into the internal space (hollow portion 14) of the core 10 may increase the air pressure in the hollow portion 14 of the core 10. By providing the first groove portion 38a3 in the upright portion 38, even when the coil 20 is inserted into the hollow portion 14 of the core 10, the air in the hollow portion 14 can pass through the first groove portion 38a3 and escape to the outside of the hollow portion 14. This effectively prevents assembly defects of the coil component 1. Furthermore, when the coil component 1 is in use, the coil 20 becomes hot, which can cause hot air to accumulate in the internal space (hollow portion 14) of the core 10. By providing the first groove portion 38a3, the hot air can be discharged to the outside of the hollow portion 14 through the first groove portion 38a3.

[0036] The first groove portion 38a3 is a recess formed on the opposing surface 38a of the upright portion 38, recessed toward the inside of the upright portion 38 in the axial direction. In this embodiment, a hole (core insertion hole 38b) is formed in the center of the upright portion 38. The leg portion 13 of the core 10 is inserted into the core insertion hole 38b. In this embodiment, the first groove portion 38a3 is vertically divided into an upper groove portion 38c and a lower groove portion 38d, sandwiched between the core insertion hole 38b. As shown in FIG. 6(b) , the upper groove portion 38c extends from the core insertion hole 38b to the boundary between the upright portion 38 and the top plate portion 34 (to the upper end of the upright portion 38). As shown in FIG. 6(a) , the lower groove portion 38d extends from the core insertion hole 38b to the boundary between the upright portion 38 and the base portion 36 (to the lower end of the upright portion 38). In this embodiment, the upper groove portion 38c and the lower groove portion 38d are arranged on the same straight line, but this is not limited thereto. The lower groove portion 38d may be arranged so as to avoid the center line of the upper groove portion 38c.

[0037] The extending direction of the first groove portion 38a3 may have a vertical component greater than a horizontal component. That is, the first groove portion 38a3 may extend parallel to the vertical direction or may extend in a direction slightly inclined relative to the vertical direction. In this embodiment, the first groove portion 38a3 extends from the lower end to the upper end of the upright portion 38 across the core insertion hole 38b, but this is not limited thereto. For example, the upright portion 38 may have only the upper groove portion 38c or only the lower groove portion 38d. The facing region 38a4 is a region of the facing surface 38a that overlaps with the inner end surfaces 21a, 22a of the coil 20 in the axial direction. The first groove portion 38a3 may terminate at the periphery of the facing region 38a4 or may extend to the outside of the facing region 38a4 and terminate there. In the present embodiment, the dimension of the first groove portion 38a3 in the width direction (left-right direction) is smaller than the dimension in the up-down direction, and the first groove portion 38a3 has a shape elongated in the up-down direction. Alternatively, the dimension of the first groove portion 38a3 in the width direction may be larger than the dimension in the up-down direction.

[0038] As shown in FIG. 6B , in this embodiment, a second groove 34c is formed on the bottom surface 34b of the top plate 34, which faces the base 36 (downward) in the upright direction (vertical direction). The bottom surface 34b is an inner surface facing the interior of the base 30 and also faces the circumferential surface of the coil 20. The second groove 34c extends in the axial direction of the coil 20. One end of the second groove 34c (an axial end; an inner end 34d, which is the inner end in the axial direction) communicates with one end (upper end 38a5) of the first groove 38a3. The provision of the second groove 34c in the top plate 34 suppresses an increase in air pressure in the internal space (hollow portion 14) of the core 10 during assembly of the coil component 1, even when the top plate 34 and the circumferential surface 24 of the coil 20 are in close proximity. Furthermore, when the coil component 1 is in use, hot air that accumulates in the internal space (hollow portion 14) of the core 10 can escape through the second groove portion 34c.

[0039] Here, the lower surface 34b of the top plate portion 34 facing downward refers to the surface of the top plate portion 34 facing downward. In this embodiment, the lower surface 34b also includes the surface of a top plate protrusion 34a, which will be described later. The second groove portion 34c is a recess formed by recessing upward in the lower surface 34b of the top plate portion 34. In this embodiment, the second groove portion 34c is formed in the top plate protrusion 34a, which will be described later, of the top plate portion 34. This allows a space to be provided between the adjacent top plate protrusion 34a and the circumferential surface 24 of the coil 20. When viewed from the top-bottom direction, the second groove portion 34c may extend axially outward beyond the axially outer end faces (outer end faces 21b, 22b (see FIG. 3)) of the end faces of the coil 20, or may terminate axially inward beyond the outer end faces 21b, 22b. In this embodiment, as shown in FIG. 5 , the outer end surfaces 21b, 22b of the coil 20 are disposed axially outward (front-to-back) from the peripheral edge of the top plate portion 34 as viewed from above. In this embodiment, the second groove portion 34c (see FIG. 6(b) ) terminates axially inward from the outer end surfaces 21b, 22b. Specifically, as shown in FIG. 6(b) , the second groove portion 34c preferably extends to the outer end (outer end 34c1) of the top plate portion 34 (top plate protrusion 34a) in the axial direction. Alternatively, if the outer end surfaces 21b, 22b of the coil 20 are disposed axially inward from the peripheral edge of the top plate portion 34 as viewed from above, the second groove portion 34c may extend to the outer end of the top plate portion 34 in the axial direction, or may terminate midway in the axial direction without extending to that end.

[0040] Here, "the end of one groove communicates with the end of another groove" refers to the hollow space of one groove (particularly its end) communicating with the hollow space of the other groove (particularly its end). Furthermore, "the end of one groove communicates with the end of another groove" does not necessarily mean that the ends are adjacent and directly connected to each other, but also includes an open space between the end of one groove and the end of the other groove, through which the end of the one groove communicates with the end of the other groove. The open space is a hollow space that spatially connects the end of one groove with the end of the other groove. In particular, the open space is preferably a space on the extension of the one groove in the extension direction of the one groove, or a space on the extension of the other groove in the extension direction of the other groove, and is an open space without a portion of the base portion disposed therein. In this embodiment, the inner end 34d of the second groove 34c directly communicates with the upper end 38a5 of the first groove 38a3. That is, in the top plate portion 34, the second groove portion 34c extends to the upper end of the upright portion 38, and the inner end 34d of the second groove portion 34c is adjacent to the upper end 38a5 of the first groove portion 38a3. Alternatively, the inner end 34d of the second groove portion 34c may be connected to the upper end 38a5 of the first groove portion 38a3 (upper groove portion 38c) via an open space. For example, unlike the shape of the top plate protrusion 34a of this embodiment, the top plate protrusion 34a may be provided only on a portion of the outer side of the top plate portion 34 in the axial direction, and not on a portion of the inner side of the top plate portion 34. In this case, the portion of the inner side of the top plate portion 34 in the axial direction where the top plate protrusion 34a is not provided is recessed above the top plate protrusion 34a, forming an open space. When the inner end 34d of the second groove portion 34c is adjacent to the open space and the upper end 38a5 of the first groove portion 38a3 is also adjacent to the open space, it can be said that the inner end 34d of the second groove portion 34c and the upper end 38a5 of the first groove portion 38a3 are connected.

[0041] As shown in FIG. 6A , in this embodiment, a third groove 36e is formed on the upper surface of the base 36 facing the top plate 34 (upward) in the upright direction (vertical direction). The third groove 36e extends in the axial direction (front-rear direction) of the coil 20. One end of the third groove 36e (the inner end 36f on the inside of the base 30 in the axial direction and also the end on the upright portion 38 side) communicates with one end (the lower end 38a6) of the first groove 38a3. As described above, the third groove 36e connects the hollow portion 14 to the outside. This prevents an unexpected increase in air pressure in the hollow portion 14 when the coil 20 is inserted into the internal space (hollow portion 14) of the core 10 during the manufacturing process of the coil component 1. Furthermore, if the temperature of the hollow portion 14 of the core 10 rises during use of the coil component 1, air is supplied to the hollow portion 14 through the third groove portion 36e, thereby lowering the temperature of the hollow portion 14.

[0042] The upper surface of the base 36 refers to the surface of the base 36 that faces upward. In the base 36 of this embodiment, which has a base protrusion 36g, the upper surface also includes the surface of the base protrusion 36g (particularly the protruding end surface 36h). In this embodiment, the third groove 36e is formed on the base protrusion 36g. This separates the coil 20 from the base 36 at the point where the circumferential surface 24 of the coil 20 and the base 36 are closest to each other, thereby providing a space through which air and the like can pass. In this embodiment, the inner end 36f of the third groove 36e directly communicates with the lower end 38a6 of the first groove 38a3 (lower groove 38d). That is, in the base portion 36, the third groove portion 36e extends to the lower end of the upright portion 38, and the inner end 36f of the third groove portion 36e and the lower end 38a6 of the first groove portion 38a3 are adjacent to each other. Alternatively, the inner end 36f of the third groove portion 36e may be indirectly connected to the lower end 38a6 of the first groove portion 38a3 (lower groove portion 38d). For example, the inner end 36f of the third groove portion 36e may be connected to the lower end 38a6 of the first groove portion 38a3 (lower groove portion 38d) via an open space.

[0043] In this embodiment, as shown in FIG. 4 , the coil 20 is exposed from the core 10 when viewed from the outer side in the axial direction. This promotes cooling of the coil 20, which becomes heated during use. Specifically, the upper end of the winding portion 28 of the coil 20 is exposed from the upper end of the core 10. Furthermore, the lower end of the winding portion 28 of the coil 20 is exposed from the lower end of the core 10. By exposing both the upper and lower ends of the winding portion 28, outside air can flow into the hollow portion 14 from below the core 10 and then flow out of the hollow portion 14 from above the core 10. This promotes cooling of the winding portion 28 arranged in the hollow portion 14. Alternatively, only the upper end, only the lower end, or other portions of the winding portion 28 may be exposed from the core 10 when viewed from the outer side in the axial direction.

[0044] 5, the hollow portion 14 is exposed from the top plate portion 34 when viewed from the top side of the top plate portion 34 in the upright direction (vertical direction). That is, in this embodiment, the hollow portion 14 is visible from above. The opening at the top of the hollow portion 14 allows hot air to be exhausted from the internal space (hollow portion 14) of the core 10.

[0045] In this embodiment, a portion of the hollow portion 14 does not overlap with the top plate portion 34 in the vertical direction. Furthermore, no other components of the coil device 1 are disposed above this portion of the hollow portion 14. Therefore, the hollow portion 14 is exposed from the top plate portion 34 when viewed from above. As shown in FIG. 2 , the core 10 in this embodiment does not have a side wall portion 16 disposed above the hollow portion 14, and the hollow portion 14 is open at the top. Therefore, in this embodiment, the portion of the hollow portion 14 that does not overlap with the top plate portion 34 in the vertical direction is visible from above. In this embodiment, as shown in FIG. 5 , a portion of the hollow portion 14 is disposed outward from the top plate portion 34 in the axial direction. In other words, a portion of the outer side of the hollow portion 14 in the axial direction is exposed from the top plate portion 34 when viewed from above. That is, a portion of the outer side of the hollow portion 14 communicates with the space above the coil device 1. As a result, the air that flows into the hollow portion 14 from the third groove portion 36e through the first groove portion 38a3 moves from the inner side to the outer side in the axial direction and is released from the outer opening 14a of the hollow portion 14 (the opening of the hollow portion 14 defined by the core 10 and the top plate portion 34) to the outside of the coil device 1. In other words, the air that flows into the hollow portion 14 is released to the outside after sufficiently circulating through the hollow portion 14. This allows the inside of the hollow portion 14 to be sufficiently cooled.

[0046] In this embodiment, as shown in FIG. 4 , protrusions (top plate protrusion 34a and base protrusion 36g) are formed on the top plate 34 and base 36, respectively. Protrusion end faces 34a1 and 36h of the protrusions extend in the axial direction (front-rear direction) of the coil 20 along a portion of the circumferential surface 24 of the coil 20. During the manufacturing process of the coil component 1, the protrusion end faces 34a1 and 36h act as guides to facilitate insertion of the coil 20 into the hollow portion 14 of the core 10. In this embodiment, the top plate protrusion 34a is a portion that protrudes (downward) from the flat portion of the top plate 34 toward the side where the coil 20 is disposed. The top plate protrusion 34a is formed in the center of the top plate 34 in the left-right direction. In other words, the top plate protrusion 34a protrudes downward beyond both ends of the top plate 34 in the left-right direction. In this embodiment, the base protrusion 36g is a portion that protrudes (upward) from the flat portion of the base 36 toward the side where the coil 20 is disposed. The base protrusion 36g is formed in the center of the base 36 in the left-right direction. That is, the base protrusion 36g protrudes above the bottom surface of the terminal arrangement recess 36i (described later). Furthermore, two base protrusions 36g are disposed between a pair of terminal arrangement recesses 36i. The protrusion end faces 34a1 and 36h are surfaces of the protrusions that face the protruding direction of the protrusions. That is, the protrusion end face 34a1 is the lower surface of the top plate protrusion 34a, and the protrusion end face 36h is the upper surface of the base protrusion 36g. The protrusion end faces 34a1 and 36h extending along a portion of the circumferential surface of the coil 20 refer to the fact that the approximate concave and convex shapes (positions and depths of the concave and convex shapes) of the protrusion end faces 34a1 and 36h coincide with the arc shape of the circumferential surface 24 of the coil 20. The protruding end faces 34a1, 36h of the protrusions conform to the arc shape of the circumferential surface 24 of the coil 20, and are therefore concave in the opposite direction to the protruding direction of the protrusions. The protruding end face 34a1 of the top plate protrusion 34a and the protruding end face 36h of the base protrusion 36g are concave upward or downward, respectively. The grooves on the protruding end faces 34a1, 36h extend in the axial direction (front-to-back direction). The bottom surfaces of the grooves (which can also be considered the top surfaces of the protruding end face 34a1) are positioned higher than the ends of the protruding end face 34a1 in the left-right direction. The grooves make it difficult for the coil 20 to shift left and right when inserted into the base portion 30.The protruding end surfaces 34a1, 36h may be curved or may be surfaces formed so that flat surfaces are adjacent to each other. In this embodiment, the protruding end surface 34a1 of the top plate protruding portion 34a is a curved surface. The protruding end surface 36h of the base protruding portion 36g includes a bottom surface and a pair of wall surfaces that define the third groove portion 36e, and the bottom surface and the wall surfaces are each flat.

[0047] In this embodiment, as shown in Fig. 4 , a top plate arrangement recess 18 is formed in a portion of the top plate portion 34 side (upper side) of the core 10 in the standing direction (vertical direction). The top plate arrangement recess 18 is a recess that is recessed toward the base portion 36 side (lower side) in the standing direction (vertical direction). As shown in Fig. 5 , the top plate arrangement recess 18 extends in the axial direction (front-rear direction) of the coil 20. At least a portion of the top plate portion 34 is disposed within the top plate arrangement recess 18. With the above-described configuration, during the manufacturing process of the coil component 1, the top plate portion 34 and the top plate arrangement recess 18 are fitted together to guide the insertion of the core 10 into the base portion 30 in the axial direction.

[0048] As shown in FIG. 5 , the top plate placement recess 18 in this embodiment spans both ends of the core in the front-to-rear direction. Furthermore, the top plate portion 34 is disposed across both the top plate placement recess 18 in the first core 11 and the top plate placement recess 18 in the second core 12. Alternatively, the top plate portion 34 may be disposed only in the top plate placement recess 18 provided in one of the cores 10. As shown in FIG. 4 , in this embodiment, only the lower portion of the top plate portion 34 is disposed in the top plate placement recess 18, and the upper portion of the top plate portion 34 is disposed outside the top plate placement recess 18 (the space above the top plate placement recess 18). This allows the top plate portion 34 to protect the core 10. Alternatively, a portion of the upper surface of the top plate portion 34 may be disposed in the top plate placement recess 18.

[0049] In this embodiment, as shown in FIG. 4 , the terminal member 40 has two hook-shaped hook portions (a first hook portion 42 and a second hook portion 44). The protruding direction of the hook shape of the first hook portion 42 is opposite to the protruding direction of the hook shape of the second hook portion 44. A portion of the base portion 36 is arranged to be sandwiched between the first hook portion 42 in the upright direction (vertical direction). The end portion of the coil 20 is arranged to be sandwiched between the second hook portion 44 in the upright direction (vertical direction). In this embodiment, the two hook portions secure the coil 20 and the base portion 30 while helping to prevent the terminal member 40 from coming loose.

[0050] Here, the hook shape refers to a protruding (U-shaped) shape formed by bending the tip back toward the base end. In other words, a hook-shaped portion can hook onto another component by sandwiching the other component between a distal end portion of the hook-shaped portion and a proximal end portion of the hook-shaped portion. The protruding direction of the hook shape refers to the direction of the protruding portion of the hook-shaped portion facing the distal end of the bent protruding shape. It can also be said that the hook shape opens in the opposite direction to the protruding direction. In this embodiment, the protruding direction of the first hook portion 42 is outward in the left-right direction, and the protruding direction of the second hook portion 44 is inward in the left-right direction. In this embodiment, the terminal member 40 has an overall S-shape (including an inverted S-shape) when viewed in the front-rear direction. That is, the openings of the two hook shapes are offset vertically. Alternatively, the openings of the two hook shapes may be positioned at the same height vertically and facing each other. Specifically, the overall shape of the terminal member 40 when viewed in the front-rear direction may be a downward or upward C-shape.

[0051] The phrase "a part of the base portion 36 or the terminal end of the coil 20 (the end of the lead-out portion 26)") being sandwiched between the hook portion in the vertical direction means that the part is disposed between a part of the distal end and a part of the proximal end of the hook-shaped terminal member 40 in the vertical direction. The terminal member 40 may be in contact with the other part, or the terminal member 40 (particularly the part of the distal end or the proximal end of the hook-shaped terminal member 40) may be spaced apart from the other part. In the present embodiment, the terminal member 40 is disposed on the base portion 36. Specifically, the first hook portion 42 of the terminal member 40 is hooked onto a part of the base portion 36 (a part including the bottom surface of the base portion 36). The protruding end of the second hook portion 44 is accommodated in a terminal accommodating recess 36k (see FIG. 6A) formed in the base protruding portion 36g. The protruding end of the hook portion is the tip of the hook portion in the protruding direction of the hook portion. The terminal accommodating recess 36k (see FIG. 6(a)) is a recess formed on the side surface of the base protrusion 36g and recessed inward in the left-right direction. The protruding end of the hook is sandwiched between a pair of walls that define the terminal accommodating recess 36k in the front-rear direction. The terminal accommodating recess 36k prevents the terminal member 40 from shifting in the front-rear direction.

[0052] As shown in FIG. 6( a), in this embodiment, a notch 36a is formed in a portion of the base portion 36 sandwiched between the first hook portions 42. The notch 36a is recessed inward in the front-to-rear direction. By forming the notch 36a, a protrusion 43 (described later) can be accommodated in the notch 36a. Furthermore, by forming the notch 36a, the state of the connection between the lead portion 26 and the terminal member 40 by the solder 70 can be visually confirmed (including by image recognition using a device). Also, as shown in FIG. 6( a), the terminal member 40 of this embodiment has a protrusion 43. The protrusion 43 is a flat portion that protrudes axially outward from a portion of the base end of the hook shape of the first hook portion 42. In this embodiment, the protrusion 43 extends at a slight incline relative to the lateral direction. Specifically, the protrusion 43 is inclined downward toward the axially outward side. Therefore, the protrusion 43 is disposed in the cutout 36a. Specifically, the protrusion 43 is sandwiched between the wall portions that form the cutout 36a in the left-right direction. This effectively prevents the terminal member 40 from shifting left-right relative to the base 36. As a result, the terminal member 40 is securely fixed to the base 36. The protrusion dimension (the dimension in the protrusion direction, i.e., the dimension along the surface of the protrusion 43) of the protrusion 43 may be the same as, greater than, or smaller than the depth dimension (the dimension in the axial direction) of the cutout 36a. Note that, for convenience, FIGS. 6( a) and 6(b) illustrate the protrusion 43 with a large inclination angle. In an actual coil component 1, the protrusion 43 may extend in a direction with a larger lateral component. Alternatively, the protrusion 43 may extend axially without inclining. In this case, the protrusion 43 does not need to be accommodated in the cutout 36a.

[0053] In this embodiment, as shown in FIG. 4 , a pair of terminal placement recesses 36i (a first terminal placement recess 36i1 and a second terminal placement recess 36i2) are formed on the surface of the base 36. The terminal placement recesses 36i are grooves in which the lead-out portions 26 are respectively disposed. As shown in FIG. 7 , the axial dimensions (dimensions L1 and L2) of each of the pair of terminal placement recesses 36i are greater than the axial (front-rear) dimensions (dimensions L3 and L4) of the portions (tip ends 26e (see FIG. 3 )) of the lead-out portions (first lead-out portion 26a and second lead-out portion 26b) at both ends of the coil 20 that are disposed in the terminal placement recess 36i. As described above, the terminal placement recess 36i has a sufficient length, allowing the coil 20 to be disposed on the base 36 regardless of the length of the lead-out portion 26. Specifically, depending on the spiral direction of the coil 20, the first lead portion 26a may have a longer axial dimension than the second lead portion 26b, or the first lead portion 26a may have a shorter axial dimension than the second lead portion 26b. Since the pair of end arrangement recesses 36i have the above-mentioned dimensional relationship, each lead portion 26 is arranged in the end arrangement recess 36i regardless of the spiral direction of the coil 20.

[0054] The terminal arrangement recess 36i is a recess formed by a downward depression in the upper surface of the base portion 36, and is the portion in which the lead portion 26 is disposed. In this embodiment, the bottom of the terminal arrangement recess 36i is disposed below the plateau portion 36j and the base protrusion 36g. Furthermore, a portion of the terminal arrangement recess 36i is disposed between the plateau portion 36j and the base protrusion 36g. The terminal arrangement recess 36i includes not only the space between the plateau portion 36j and the base protrusion 36g, but also the space outward in the front-to-rear direction from the space sandwiched between the plateau portion 36j and the base protrusion 36g. In other words, in this embodiment, the terminal arrangement recess 36i also includes the space in which the terminal member 40 is disposed. Furthermore, the terminal arrangement recess 36i in this embodiment is open on the outer axial side. This allows the lead portion 26 to be disposed in the terminal arrangement recess 36i by inserting a coil into the base portion 30 in the axial direction, as described below. In this embodiment, the outer bottom of the terminal arrangement recess 36i (the area where the terminal member 40 is arranged) is recessed lower than the inner bottom of the terminal arrangement recess 36i (the area where the terminal member 40 is not arranged). As a result, when the terminal member 40 is arranged on the outer bottom, the difference in height between the surface of the terminal member 40 and the inner bottom of the terminal arrangement recess 36i is small, and the coil 20 can be arranged more stably in the terminal arrangement recess 36i.

[0055] In this embodiment, one end (inner end) of the first end recess 36i1 and the second end recess 36i2 extends to the base end of the upright portion 38 (the boundary between the upright portion 38 and the base portion 36). The other end (outer end) of the first end recess 36i1 and the second end recess 36i2 extends to the outer end of the base portion 36 in the front-to-rear direction. The first end recess 36i1 and the second end recess 36i2 are spaced apart in the left-to-right direction and are aligned with each other. That is, the extension direction of the first end recess 36i1 and the extension direction of the second end recess 36i2 are approximately parallel. In this embodiment, the extension direction of the first end recess 36i1 and the extension direction of the second end recess 36i2 are the axial direction (front-to-rear direction, depth direction of the page).

[0056] In this embodiment, the axial dimensions of the distal recess 36i (dimensions L1 and L2) are the lengths from the base end of the upright portion 38 (the boundary between the upright portion 38 and the base portion 36) to the outer end of the base portion 36. In this embodiment, the axial dimension of the first distal recess 36i1 (dimension L1) is the same as the axial dimension of the second distal recess 36i2 (dimension L2). Alternatively, the axial dimension of the first distal recess 36i1 (dimension L1) may be greater or smaller than the axial dimension of the second distal recess 36i2 (dimension L2). The portion of the lead portion 26 that is disposed in the distal recess 36i refers to the portion of the lead portion 26 that is disposed along the bottom of the distal recess 36i. In other words, the distal recess 36i in this embodiment is the tip portion 26e (see FIG. 3).

[0057] As shown in FIG. 4 , in this embodiment, the core 10 is fixed to the top plate portion 34 with an adhesive 50. More specifically, the top surface of the core 10 (the bottom surface of the top plate placement recess 18) and the bottom surface 34b of the top plate portion 34 are spaced apart in the vertical direction. The adhesive 50 is disposed between the top surface of the core 10 and the bottom surface 34b of the top plate portion 34 in the vertical direction, and is fixed to both the top surface of the core 10 and the bottom surface of the top plate portion 34. By adhering the core 10 to the top plate portion 34 with the adhesive 50 in this manner, the core 10 is securely fixed to the base portion 30. Furthermore, by disposing the adhesive 50 between the core 10 and the top plate portion 34, wear of the core 10 or the top plate portion 34 due to friction between the core 10 and the top plate portion 34 during transportation of the coil component 1 (including electronic devices and products in which the coil component 1 is mounted) is suppressed. An example of the adhesive is a resin such as an epoxy resin. In this embodiment, adhesive 50 is dripped onto each of the four corners of the top panel portion 34 .

[0058] 1 , the coil component 1 in this embodiment further includes a tape portion 60. The tape portion 60 is disposed so as to surround the first core 11 and the second core 12. The tape portion 60 keeps the first core 11 and the second core 12 adjacent to or in contact with each other.

[0059] As shown in FIG. 4 , in this embodiment, the lead-out portion 26 is brazed to the terminal member 40 with a brazing material (solder 70). This electrically connects the lead-out portion 26 to the terminal member 40. In this embodiment, the solder 70 covers the upper part of the second hook portion 44 of the terminal member 40. In this embodiment, a portion of the tip side of the second hook portion 44 and the lead-out portion 26 are spaced apart in the vertical direction, and a portion of the solder 70 is disposed between the portion of the tip side of the second hook portion 44 and the lead-out portion 26. The connection between the terminal member 40 and the lead-out portion 26 is not limited to the method described above. The terminal member 40 and the lead-out portion 26 may simply abut against each other to be electrically connected.

[0060] (Method for Manufacturing Coil Component) A method for manufacturing the coil component 1 of this embodiment (hereinafter, sometimes referred to as the present method) will be described below. Fig. 7 is a perspective view of the coil component 1 in the manufacturing process for explaining the present method.

[0061] First, an overview of this method will be described. This method includes a coil mounting step. In this embodiment, this method further includes a terminal member positioning step, a coil placement step, and a crimping step. Each step will be described in detail later.

[0062] Next, this method will be described in detail. The terminal member 40 is formed by bending a flat plate portion extending in the longitudinal direction. The terminal member 40 has a hook portion (first hook portion 42) having a hook shape at one end. That is, the flat plate portion is bent so that one end in the longitudinal direction has a hook shape, thereby forming the first hook portion 42. Also, as shown in FIG. 7 , in this embodiment, the first hook portion 42 of the terminal member 40 before being placed on the base portion 30 is formed so that the base end and tip end of the hook shape are arranged approximately parallel, while the second hook portion 44 is arranged so that the base end of the hook shape is oblique to the tip end. That is, the second hook portion 44 has a hook shape that is more open than the first hook portion 42. The dimension (dimension L5) of the hook-shaped tip of the second hook portion 44 in the width direction (left-right direction) is preferably smaller than the dimension (depth dimension L6) of the terminal accommodating recess 36k in the width direction, thereby preventing the second hook portion 44 from interfering with the coil 20 in the coil attachment process described below.

[0063] In the terminal member placement process, the first hook portion 42 is positioned so as to sandwich the base portion 36 in the upright direction (vertical direction). Specifically, a portion of the base portion 36 is positioned between the hook-shaped tip and base end of the first hook portion 42. In this embodiment, the terminal member 40 is inserted into the base portion 30 inward in the left-right direction with the opening of the first hook portion 42 facing the base portion 36. At this time, the second hook portion 44 (particularly the hook-shaped tip portion of the second hook portion 44) is accommodated in the terminal accommodating recess 36k. The terminal member placement process described above is preferably performed before the coil attachment process, but is not limited to this. The terminal member placement process may also be performed after the coil attachment process. In the terminal member placement process, the protrusion 43 preferably extends in the axial direction. That is, the protrusion 43 is preferably not inclined as shown in FIG. 6( a). This is because the protrusion 43 does not interfere with the base portion 36 when the terminal member 40 is disposed. After the terminal member 40 is disposed, the protrusion 43 may be pushed downward so that the protrusion 43 extends at an angle relative to the axial direction.

[0064] In the coil attachment process, the coil 20 is attached to the base portion 30. This attachment is performed by moving the coil 20 along its axial direction as follows. Specifically, the coil 20 is moved so that one end face (inner end faces 21 a, 22 a) of the coil 20 faces the opposing surface 38 a, which is the side surface of the upright portion 38. The coil 20 is moved toward the opposing surface 38 a. That is, the coil 20 is inserted into the base portion 30 along the axial direction toward the upright portion 38. By attaching the coil 20 to the base portion 30 as described above, the coil 20 can be positioned by the upright portion 38. This is because even if the coil 20 is accidentally inserted too deeply into the base portion 30, the inner end faces 21 a, 22 a of the coil 20 abut against the opposing surface 38 a of the upright portion 38, stopping the insertion of the coil 20. Here, inserting the coil 20 into the base portion 30 refers to moving the coil 20 in a predetermined direction to place the coil 20 in a predetermined space in the base portion 30. The predetermined space does not necessarily have to be surrounded by the base portion 30. That is, in this embodiment, the coil 20 is inserted into the space defined by the upright portion 38, the top plate portion 34, and the pedestal portion 36, but this is not limited to this. For example, even if the base portion 30 does not have a top plate portion 34, placing the coil 20 in the space defined by the pedestal portion 36 and the upright portion 38 in the base portion 30 is expressed as "inserting the coil 20 into the base portion 30." Similarly, inserting the core 10 (see FIG. 1 ) into the base portion 30 refers to moving the core 10 in a predetermined direction to place the core 10 in a predetermined space in the base portion 30.

[0065] In the coil attachment process, the winding portion 28 is guided by the protruding end surface 34a1 of the top plate protrusion 34a and the protruding end surface 36h of the base protrusion 36g and inserted into the base portion 30. After insertion, the winding portion 28 is positioned between the protruding end surface 34a1 of the top plate protrusion 34a and the protruding end surface 36h of the base protrusion 36g. Furthermore, in the coil attachment process, each of the two lead-out portions 26a, 26b is axially inserted into each of the two terminal placement recesses 36i1, 36i2. Specifically, the coil 20 is attached so that the terminal end of the coil 20 is positioned on a portion of the terminal member 40. In this embodiment, the portion of the terminal member 40 on which the terminal end of the coil 20 is positioned is the hook-shaped base end of the second hook portion 44.

[0066] In the crimping process, the distal end of the coil 20 (particularly the distal end 26e of the lead-out portion 26) is crimped between the hook-shaped distal end of the second hook portion 44 and the hook-shaped proximal end of the second hook portion 44. Specifically, the hook-shaped distal end of the second hook portion 44 is pushed downward to bring the distal end and proximal end of the hook-shaped second hook portion 44 closer together. Here, crimping refers to pressing the hook-shaped distal end of the second hook portion 44 against the distal end of the coil 20. However, after the crimping process, the hook-shaped distal end of the second hook portion 44 may be in pressure contact with the distal end of the coil 20, may simply be in contact with the distal end, or may be spaced apart from the distal end. This crimping process is performed after the coil attachment process. The second hook portion 44 described above is formed by this crimping process. The coil 20 can be fixed to the base portion 36 using the terminal member 40 by the above-mentioned crimping process.

[0067] The present invention is not limited to the above-described embodiment, but includes various modifications and improvements as long as the object of the present invention is achieved. The following modifications can be combined as appropriate.

[0068] Alternatively, the base portion 30 may not have the top plate portion 34. For example, the base portion 30 may terminate at the upper end of the upright portion 38.

[0069] The above embodiments encompass the following technical concepts: (1) A coil component comprising: two or more cores; two or more coils spirally arranged around at least a portion of the cores; and a base portion holding the coils and the cores and on which terminal members are arranged, wherein the base portion comprises: a pedestal portion on which the terminal members are arranged and on which the coils or the cores are placed, and an upstanding portion arranged upright so as to intersect with a surface of the pedestal in an upstanding direction, wherein the pedestal portion and the upstanding portion are integrally formed, and one end face of each of the plurality of coils faces an opposing surface that is a side surface of the upstanding portion. (2) The coil component described in (1), wherein the one end face of a first coil faces the one end face of a second coil in the axial direction of the first coil, and the base portion is provided with a locking portion sandwiched and arranged between the first core and the second core in the axial direction. (2-1) A coil component in which the core has an accommodating recess formed by recessing one end of the core inward in the axial direction toward the outside of the base in the axial direction, and the locking portion is disposed in the accommodating recess. (2-2) A coil component in which the surface of the core includes a collision surface that defines the accommodating recess and faces the surface of the locking portion in the axial direction, and the collision surface of the first core and the collision surface of the second core are each spaced apart from the locking portion in the axial direction. (2-3) A coil component in which the axial separation distance between the collision surface of the first core and the locking portion is greater than the axial separation distance between the collision surface of the second core and the locking portion. (2-4) A coil component in which the surface of the core includes a collision surface that defines the accommodating recess and faces the surface of the locking portion in the axial direction, and the collision surface of the first core is spaced apart from the locking portion in the axial direction, and the collision surface of the second core is in contact with the locking portion. (3) The coil component according to (1) or (2), wherein the core covers the circumferential surface of the coil, the base portion further has a top plate portion arranged to sandwich the standing portion with the pedestal portion in the standing direction, the top plate portion being formed integrally with the standing portion and covering at least a portion of the core when viewed from the top plate portion side in the standing direction.(4) The coil component according to (3), wherein a first groove portion extending in the rising direction is formed in the opposing surface of the rising portion, and the first groove portion extends from the inside of a region of the opposing surface facing the one end face to the periphery of the region. (5) The coil component according to (4), wherein a second groove portion extending in the axial direction of the coil is formed in a lower surface of the top plate portion facing the base portion in the rising direction, and one end of the second groove portion is connected to one end of the first groove portion. (6) The coil component according to (4) or (5), wherein a third groove portion extending in the axial direction of the coil is formed in an upper surface of the base portion facing the top plate portion in the rising direction, and one end of the third groove portion is connected to one end of the first groove portion. (6-1) A coil component in which the coil is exposed from the core when viewed from the outer side in the axial direction. (7) The coil component according to any one of (3) to (6), wherein the core has a side wall portion surrounding a portion of the circumferential surface of the coil, and a hollow portion defined by the side wall portion and accommodating the coil, the hollow portion being exposed from the top plate portion when viewed from the top plate portion side in the standing direction. (7-1) A coil component, wherein a portion of the outer side of the hollow portion in the axial direction is exposed from the top plate portion. (8) The coil component according to any one of (3) to (7), wherein the top plate portion and the base portion each have a protruding portion whose protruding end surface extends in the axial direction of the coil along a portion of the circumferential surface of the coil. (8-1) A coil component, wherein the protruding end surface has a recessed groove recessed in a direction opposite to the protruding direction of the protruding portion, and a bottom surface of the recessed groove is positioned higher than an end of the protruding end surface in the width direction of the base portion. (9) The coil component according to any one of (3) to (8), wherein a top plate arrangement recess that is a recess recessed toward the base portion in the standing direction is formed in a part of the core on the top plate portion side, the top plate arrangement recess extending in the axial direction of the coil, and at least a part of the top plate portion is arranged within the top plate arrangement recess. (9-1) A coil component wherein a lower part of the top plate portion is arranged in the top plate arrangement recess, and an upper part of the top plate portion is arranged in a space external to the top plate arrangement recess and above the top plate arrangement recess.(10) The coil component according to any one of (1) to (9), wherein the terminal member includes two hook portions having a hook shape, a protruding direction of the hook shape of the first hook portion is opposite to a protruding direction of the hook shape of the second hook portion, a part of the base portion is arranged sandwiched between the first hook portions, and an end portion of the coil is arranged sandwiched between the second hook portions in the standing direction. (10-1) The coil component according to any one of (1) to (9), wherein the base protruding portion has a terminal accommodating recess formed on a side surface of the base protruding portion, the terminal accommodating recess being a recess recessed inward in the width direction of the base portion, and a protruding end of the hook portion is arranged in the terminal accommodating recess and is arranged between a pair of wall portions that define the terminal accommodating recess in the axial direction. (11) A coil component according to any one of (1) to (10), wherein the coil has lead-out portions that extend downward from both end portions of the coil and are bent, and that extend in the axial direction of the coil along the surface of the base portion, and a pair of end placement recesses that are recessed grooves in which the lead-out portions are disposed are formed on the surface of the base portion, and a dimension in the axial direction of each of the pair of end placement recesses is larger than any dimension in the axial direction of a part of the lead-out portions of each of the both end portions that are disposed in the end placement recess. (11-1) A coil component wherein each of the pair of end placement recesses extends to a base end of an upright portion on the base portion. (12) A method for manufacturing a coil component having two or more cores, two or more coils arranged in a spiral around at least a portion of the cores, and a base portion holding the coils and the cores and on which terminal members are arranged, wherein the base portion includes: a pedestal portion on which the terminal members are arranged and on which the coils and the cores are placed, and an upright portion arranged upright so as to intersect with a surface of the pedestal portion in an upright direction, the pedestal portion and the upright portion being integrally formed, the method including a coil mounting step of attaching the coil to the base portion by moving the coil toward an opposing surface that is a side surface of the upright portion in an orientation such that one end surface of the coil faces the opposing surface.(13) The method for manufacturing a coil component according to (12), further comprising: (1) a terminal member arranging step in which the terminal member is formed by bending a flat plate portion extending in the longitudinal direction and has a hook portion at one end, in which the coil is attached such that an end portion of the coil is arranged on a portion of the terminal member in the coil attaching step, and (2) a crimping step in which the end portion of the coil is crimped between the other end of the terminal member and the portion of the terminal member after the coil attaching step. (14) The coil component further comprises an adhesive, in which an upper surface of the core and a lower surface of the top plate portion are spaced apart in the vertical direction, and the adhesive is arranged between the upper surface of the core and the lower surface of the top plate portion in the standing direction, and is fixed to each of the upper surface of the core and the lower surface of the top plate portion.

[0070] 1 Coil component 10 Core, 11 First core, 12 Second core, 13 Leg portion, 14 Hollow portion, 14a Opening, 15 Outer placement portion, 16 Side wall portion, 17 Storage recess, 17a Collision surface, 18 Top plate placement recess 20 Coil, 21 First coil, 21a Inner end surface, 22 Second coil, 22a Inner end surface, 24 Circumferential surface, 26 Pull-out portion, 26a First pull-out portion, 26b Second pull-out portion, 26c Bent portion, 26d Base end portion, 26e Tip portion, 28 Winding portion 30 Base portion, 32 Locking portion, 34 Top plate portion, 34a Top plate protruding portion, 34a1 Protruding end surface, 34b Lower surface, 34c Second groove portion, 34d Inner end portion, 36 Pedestal portion, 36e Third groove portion, 36f inner end portion, 36g pedestal protruding portion, 36h protruding end surface, 36i terminal arrangement recess, 36i1 first terminal arrangement recess, 36i2 second terminal arrangement recess, 36j platform portion, 36k terminal accommodating recess, 38 standing portion, 38a opposing surface, 38a1 first opposing surface, 38a2 second opposing surface, 38a3 first groove portion, 38a4 opposing region, 38a5 upper end portion, 38a6 lower end portion, 38b core insertion hole, 38c upper groove portion, 38d lower groove portion 40 terminal member, 42 first hook portion, 44 second hook portion 50 adhesive 60 tape portion 70 solder

Claims

1. A coil component having two or more cores, two or more coils respectively arranged spirally around at least a part of the plurality of cores, and a base portion that holds the coils and the cores and on which a terminal member is arranged, wherein the base portion includes a pedestal portion on which the terminal member is arranged and the coil or the core is placed, and an upright portion that stands up so as to intersect the surface of the pedestal portion in the upright direction, and the pedestal portion and the upright portion are integrally formed, and one end surface of each of the plurality of coils faces a facing surface that is a side surface of the upright portion.

2. The one end surface of the first coil faces the one end surface of the second coil in the axial direction of the first coil, and the base portion is provided with a locking portion arranged to be sandwiched between the first core and the second core in the axial direction. The coil component according to claim 1.

3. The core covers the circumferential surface of the coil, and the base portion further has a top plate portion arranged to sandwich the upright portion between the top plate portion and the pedestal portion in the upright direction, and the top plate portion is integrally formed with the upright portion and covers at least a part of the core when viewed from the side of the top plate portion in the upright direction. The coil component according to claim 1 or 2.

4. A first concave groove portion extending in the upright direction is formed on the facing surface of the upright portion, and the first concave groove portion extends across the inside of the region facing the one end surface on the facing surface and the periphery of the region. The coil component according to claim 3.

5. A second concave groove portion extending in the axial direction of the coil is formed on the lower surface of the top plate portion facing the pedestal portion side in the upright direction, and one end portion of the second concave groove portion communicates with one end portion of the first concave groove portion. The coil component according to claim 4.

6. A third concave groove portion extending in the axial direction of the coil is formed on the upper surface of the pedestal portion facing the top plate portion side in the upright direction, and one end portion of the third concave groove portion communicates with one end portion of the first concave groove portion. The coil component according to claim 4 or 5.

7. The core has a side wall portion that surrounds a part of the circumferential surface of the coil, and has a hollow portion defined by the side wall portion and housing the coil. The hollow portion is exposed from the top plate portion when viewed from the top plate portion side in the upright direction. The coil component according to any one of claims 3 to 6.

8. Protrusions are formed on each of the top plate portion and the pedestal portion, and the protruding end surfaces extend in the axial direction of the coil along a part of the circumferential surface of the coil. The coil component according to any one of claims 3 to 7.

9. A top plate arrangement recess, which is a recess that is recessed toward the pedestal portion side in the upright direction, is formed in a part of the core on the top plate portion side. The top plate arrangement recess extends in the axial direction of the coil, and at least a part of the top plate portion is arranged in the top plate arrangement recess. The coil component according to any one of claims 3 to 8.

10. The terminal member includes two hook portions having a hook shape. The protruding direction of the hook shape in the first hook portion is opposite to the protruding direction of the hook shape in the second hook portion. A part of the pedestal portion is arranged to be sandwiched by the first hook portion, and the end portion of the coil is arranged to be sandwiched by the second hook portion in the upright direction. The coil component according to any one of claims 1 to 9.

11. The coil has lead-out portions that extend downward from both ends of the coil and are bent, and extend in the axial direction of the coil along the surface of the pedestal portion. A pair of end arrangement recesses, which are concave groove portions in which the respective lead-out portions are arranged, are formed on the surface of the pedestal portion. The dimension of each of the pair of end arrangement recesses in the axial direction is larger than any of the dimensions of the parts of the respective lead-out portions of both ends that are arranged in the end arrangement recesses in the axial direction. The coil component according to any one of claims 1 to 10.

12. A method of manufacturing a coil component, comprising: a plurality of two or more cores; a plurality of two or more coils spirally disposed around at least a part of the cores; and a base portion that holds the coils and the cores and on which a terminal member is disposed, wherein the base portion includes a pedestal portion on which the terminal member is disposed and the coils and the cores are placed, and an upright portion that stands so as to intersect the surface of the pedestal portion in the upright direction, and the pedestal portion and the upright portion are integrally formed; and the coil is attached to the base portion by moving the coil in a direction in which one end surface of the coil faces a facing surface that is a side surface of the upright portion. The method of manufacturing a coil component includes a coil attachment step.

13. The terminal member is formed by bending a flat plate portion extending in the longitudinal direction, and has a hook portion at one end. In the coil attachment step, the coil is attached such that a terminal end portion of the coil is disposed on a part of the terminal member. The method further includes a terminal member arrangement step in which the hook portion is disposed so as to sandwich the pedestal portion in the upright direction, and a caulking step that is performed after the coil attachment step and caulks the terminal end portion of the coil between the other end portion and the part of the terminal member. The method of manufacturing a coil component according to claim 12.

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