COIL COMPONENT

Abstract

A coil component (100) comprises: a magnetic core (10) which is ring-shaped and divided circumferentially into several sub-cores (11); a coil (90) which is wound around the magnetic core (10); a base body (20) which holds the magnetic core (10); and several metal connection elements (80) which are each electrically connected to the coil (90), wherein the base body (20) has a base section (30) which is provided with the several connection elements (80) and on which the magnetic core (10) is arranged, a cover section (60) which covers the magnetic core (10), and a connecting section (70) which connects the base section (30) and the cover section (60) together.

Description

TECHNICAL AREA

[0001] The present invention relates to a coil component. TECHNICAL BACKGROUND

[0002] The component described in patent document 1 is known, for example, as a coil component.

[0003] The coil component of patent document 1 comprises a magnetic core which is ring-shaped, a coil which is wound around the magnetic core, a base section which holds the magnetic core and a cover section which covers the magnetic core, wherein the base section and the cover section are formed by separate elements. CITATION LIST PATENT DOCUMENT

[0004] Patent document 1: JP H02 - 146707 A OVERVIEW OF THE PROBLEMS THAT THE INVENTION IS INTENDED TO SOLVE.

[0005] According to studies by the inventors of the present application, there is room for improvements regarding the structure of the coil component of patent document 1 with a view to a more reliable guarantee of the structural strength between the base section and the cover section.

[0006] The present invention was motivated by the above problems and provides a coil component with a structure that is able to ensure the structural strength of the coil component more reliably. MEANS TO SOLVENT THE PROBLEM

[0007] According to the present invention, a coil component is provided which has the following: a magnetic core that is ring-shaped and divided into several sub-cores in the circumferential direction, a coil wound around the magnetic core, a base body that holds the magnetic core, and several metal connection elements, each electrically connected to the coil, wherein the base body, in one-piece design, comprises a base section which is provided with the several connecting elements and on which the magnetic core is arranged, a cover section which covers the magnetic core, and a connecting section which connects the base section and the cover section together. IMPACT OF THE INVENTION

[0008] According to the present invention, the structural strength of a coil component can be ensured more reliably. BRIEF DESCRIPTION OF THE FIGURES Fig. Figure 1 is a perspective view of a coil component according to one embodiment. Fig. Figure 2 is an expanded perspective view of the coil component according to the embodiment. Fig. Figure 3 is a top view of a coil component according to the embodiment. Fig. Figure 4 is a bottom view of the coil component according to the embodiment. Fig. Figure 5 is a cross-sectional view along line AA in Fig. 3. Fig. Figure 6 is a front view of the coil component according to the embodiment. Fig. Figure 7 is a perspective view of a basic body in the embodiment. Fig. Figure 8 is a side view of the base body in the embodiment. Fig. Figure 9 is a partially enlarged view showing a first core arrangement section and the structures surrounding it in the embodiment, and is a cross-sectional view along line AA in Fig. 6. Fig. 10A and Fig. Figure 10B shows a partial core of a magnetic core in the embodiment, wherein Fig. 10A is a top view and Fig. 10B a cross-sectional view along line AA in Fig. 10Aist. Fig. 11A is a partially enlarged view of a first passport recess and Fig. 11B shows a state in which a terminal element transitions from a state in Fig. 11A is fitted into a recess. Fig. 12A is a cross-sectional view along line AA in Fig. 11A and Fig. 12B shows a state in which the connection element transitions from a state to Fig. 12A is fitted into the pass recess. Fig. 13A and Fig. Figure 13B shows a magnetic core in a modification of the embodiment, wherein Fig. 13A is a top view and Fig. 13B a ​​cross-sectional view along line AA in Fig. 13Aist. DESCRIPTION OF THE EXECUTION FORMS

[0009] In the following, an embodiment of the present invention is described with reference to the Fig. 1 to 13B described.

[0010] In these figures, identical components are designated with the same reference symbols, and their descriptions are not repeated.

[0011] As in the Fig. 1 to Fig. As shown in Figure 5, a coil component 100 according to the present embodiment comprises a magnetic core 10 which is ring-shaped and has a structure which is divided in the circumferential direction into several sub-cores 11, coils 90 which are wound around the magnetic core 10, a base body 20 which holds the magnetic core 10, and several metal connection elements 80 with which the coils 90 are electrically connected.

[0012] The basic body 20 comprises, in a single-piece design, a base section 30, which is provided with several connection elements and on which the magnetic core 10 is arranged, a cover section 60, which covers the magnetic core 10, and a connecting section 70, which connects the base section 30 and the cover section 60 to each other.

[0013] In this context, “in one-piece design” means that the entire basic body 20, which includes the base section 30, the cover section 60 and the connecting section 70, is designed in one piece.

[0014] In this context, “covering the magnetic core 10” means that the cover section 60 overlaps at least a section of the magnetic core 10 in a top view, wherein in the present embodiment, as described later, in a top view the entire magnetic core 10 is located within the outline of the cover section 60 (the entire magnetic core 10 is thus overlapped by the cover section 60).

[0015] According to the present embodiment, the base section 30, which is provided with the several connection elements and in which the magnetic core 10 is arranged, the cover section 60, which covers the magnetic core 10, and the connecting section 70, which connects the base section 30 and the cover section 60, are thus formed in one piece.

[0016] Thus, in comparison to a case in which the base section 30 and the cover section 60 are separate elements and the base body 20 is formed by combining the separate elements as in patent document 1, the structural strength of the base body 20 and the coil component 100 can be ensured more reliably.

[0017] Since the base section 30 and the cover section 60 are formed from one element, the number of molds required to manufacture the coil component 100 can also be reduced.

[0018] Furthermore, since the magnetic core 10 is divided into several sub-cores 11, the magnetic core 10 (or the several sub-cores 11) can easily be mounted on the base body 20 and the cover section 60, even if the base section 30 and the cover section 60 are formed in one piece.

[0019] As described above, it is also possible to simplify the manufacture of the coil component 100 according to the present embodiment.

[0020] The coil component 100 according to the present embodiment is described in more detail below.

[0021] In the following description, the vertical direction is referred to as the Z-direction. A bottom side (lower side) is a side where the connecting element 80, to be described later (e.g., Fig. 1) is arranged, i.e., a mounting surface side on which the coil component 100 is mounted. However, the relative positions of the individual parts (in particular their relative position with respect to the vertical) at the time of manufacture or use of the coil component 100 are not limited to the relative positions described in this description.

[0022] The axial direction of the coils 90 is orthogonal to the Z-direction. The axial direction of the coils 90 is referred to as the Y-direction, with one side along the Y-direction being called the front (front side) and the other side the back (rear side).

[0023] Furthermore, a direction orthogonal to both the Y-direction and the Z-direction is called the X-direction, with one side along the X-direction being called the right side (right) and the other side being called the left side (left).

[0024] These directions are represented in the respective figures.

[0025] Furthermore, with respect to the Y-direction, the side on which the center of coil 90 is located along the axial direction is referred to as the inside (inner side), and the side opposite the inside is referred to as the outside (outer side). Furthermore, with respect to the X-direction, the side on which the connecting section 70 is located is referred to as the inside (inner side), and the side opposite the inside is referred to as the outside (outer side).

[0026] Furthermore, an orientation (direction) orthogonal to the Z-direction is referred to as the horizontal (horizontal direction), and an orientation (direction) along the Z-direction is referred to as the vertical (vertical direction).

[0027] As in the Fig. 1, Fig. 5 and Fig. As shown in Figure 6, in the present embodiment the base section 30 and the cover section 60 have surfaces 31 and 61 respectively facing each other.

[0028] The connecting section 70 is arranged between the mutually facing surfaces 31 and 61 of the base section 30 and the cover section 60 and connects the mutually facing surfaces 31 and 61 together.

[0029] The several sub-cores 11 (in the present embodiment, the first magnetic core 11a and the second magnetic core 11b, which are described further below) are arranged on the surface 31 of the base section 30.

[0030] With such a configuration, the multiple sub-cores 11 (magnetic core 10) can be held stably between the base section 30 and the cover section 60.

[0031] In the present embodiment, the direction along which the base section 30 and the cover section 60 face each other is the vertical direction, with the base section 30 being arranged below and the cover section 60 above the magnetic core 10. Therefore, the facing surface 31 of the base section 30 is the upper surface of the base section 30, and the facing surface 61 of the cover section 60 is the lower surface of the cover section 60.

[0032] In the present invention, however, the direction along which the base section 30 and the cover section 60 face each other is not limited to the example described above and can be adjusted as required according to the structure of the elements forming the coil component 100, the relative positions between the elements to be implemented, and the like.

[0033] As described above, the magnetic core 10 is ring-shaped and has a structure that is divided into several sub-cores 11 in the circumferential direction.

[0034] More precisely, the magnetic core comprises 10, as shown in Fig. Figure 2 shows, for example, partial cores 11, a pair of left and right core elements, that is, a first magnetic core 11a arranged on the left side and a second magnetic core 11b arranged on the right side. For example, the first magnetic core 11a and the second magnetic core 11b can be arranged facing each other and combined in such a way that, in plan view, they are arranged in a rectangular ring shape (see Figure 2). Fig. 3 and Fig. 4). Thus, the first magnetic core 11a and the second magnetic core 11b form a closed magnetic circuit.

[0035] The first magnetic core 11a and the second magnetic core 11b can, for example, be designed with the same shape and dimensions and can be arranged symmetrically to each other.

[0036] More precisely, in the present embodiment, both the first magnetic core 11a and the second magnetic core 11b are, for example, each a so-called U-core and have a U-shape in top view.

[0037] The first magnetic core 11a comprises a main section 12 extending in the front-to-back direction and a pair of outer legs 13 projecting to the right from both ends of the main section 12.

[0038] The main section 12 can, for example, be configured with a substantially prismatic shape extending from front to back. Similarly, the outer legs 13 can, for example, be configured with a substantially prismatic shape and extend from left to right. In the main section 12 and the outer legs 13, two of the four surfaces arranged around an axis form an upper surface and a lower surface, which are arranged substantially horizontally, with one of the other two surfaces (hereinafter referred to as the inner surface) facing the second magnetic core 11b, and the other (hereinafter referred to as the outer surface) facing away from the second magnetic core 11b. Like the first magnetic core 11a, the second magnetic core 11b also comprises a main section 12 and a pair of outer legs 13. However, in the second magnetic core 11b, the pair of outer legs 13 extends to the left from the two ends of the main section 12.

[0039] In the magnetic core 10, the entire surface facing the base section 30 (in the present embodiment, this is the lower surface) forms a first convexly curved surface 14, which is convex towards the base section 30, and the entire surface facing the cover section 60 (in the present embodiment, this is the upper surface) is a second convexly curved surface 15, which is convex towards the cover section 60. That is, the lower surface and the upper surface of the magnetic core 10 each have a rounded shape.

[0040] Here, "the entire surface facing the base section 30" means that essentially the entire surface of the magnetic core 10 facing the base section 30, and in particular at least 80% (preferably at least 90%) of it is the first convexly curved surface 14. The surface facing the base section 30 may, for example, also include a small portion of a flat surface. Similarly, "the entire surface facing the cover section 60" means that essentially the entire surface of the magnetic core 10 facing the cover section 60, and in particular at least 80% (preferably at least 90%) of it is the second convexly curved surface 15. The surface facing the cover section 60 may, for example, also include a small portion of a flat surface.

[0041] With such a configuration, a winding 93 of the coil 90 can be wound along the first convex curved surface 14 and the second convex curved surface 15 in a shape around the magnetic core 10 that is closer to a cylindrical shape (see e.g. Fig. 2) is as if the upper and lower surfaces of the magnetic core 10 are flat surfaces. Therefore, when winding the coil 90 around the magnetic core 10, a voltage on the coil 93 can be suppressed.

[0042] More precisely, in the present embodiment, the first convexly curved surface 14 of the magnetic core 10 is formed by the lower surface of the main section 12 and the lower surfaces of the outer legs 13. Furthermore, the second convexly curved surface 15 of the magnetic core 10 is formed by the upper surface of the main section 12 and the upper surfaces of the outer legs 13.

[0043] As in Fig. As shown in Figure 10B, in a cross-section orthogonal to the direction of extension of the main section 12, the upper surface of the main section 12 is formed in an upwardly projecting arc shape, and the lower surface of the main section 12 is formed in a downwardly projecting arc shape. However, the respective side edge sections of the upper and lower surfaces of the main section 12 are, to a small extent, planar surfaces. Furthermore, the radius of curvature of the upper and lower surfaces is essentially constant, regardless of their position on the main section 12 with respect to its direction of extension. At one end and at the other end of the main section 12, however, the radius of curvature of the upper and lower surfaces is slightly larger than the radius of curvature of the other sections.

[0044] Accordingly, in a cross-section orthogonal to the direction of extension of the outer legs 13, the upper surface of the outer legs 13 is formed in an upwardly convex arc shape, and the lower surface of the outer legs 13 is formed in a downwardly convex arc shape. However, the respective side edge segments of the upper and lower surfaces of the outer legs 13 are, to a small extent, planar surfaces. The radius of curvature of the upper and lower surfaces is constant regardless of the position of the outer legs 13 with respect to their direction of extension.

[0045] In the present embodiment, the curvature of the first convexly curved surface 14 and the radius of curvature of the second convexly curved surface 15 are the same. However, the present invention is not limited to this example, and the radius of curvature of the first convexly curved surface 14 and the radius of curvature of the second convexly curved surface 15 can also be different from each other.

[0046] Furthermore, as in Fig. As shown in Figure 10A, in the present embodiment the lower surface of the main section 12 and the lower surface of the outer legs 13 are formed adjoining each other, and the combination of the lower surface of the main section 12 and the lower surfaces of the outer legs 13 forms a convexly curved surface (first convexly curved surface 14) which is overall smoothly convex downwards.

[0047] Accordingly, the upper surface of the main section 12 and the upper surface of the outer legs 13 are formed adjacent to each other, and the combination of the upper surface of the main section 12 and the upper surfaces of the outer legs 13 forms a convexly curved surface (second convexly curved surface 15) which is overall smoothly convex upwards.

[0048] Furthermore, a front end surface of the first magnetic core 11a and the second magnetic core 11b is planar in the direction in which the outer legs 13 project and forms a vertical surface that is orthogonal to the axial direction of the coil 90.

[0049] As in Fig. As shown in Figure 3, the inner and outer surfaces of the main section 12 are also planar and form vertical surfaces that are orthogonal to the axial direction of the coil 90. The inner surface of the main section 12 of the first magnetic core 11a and the inner surface of the main section 12 of the second magnetic core 11b face each other, and the outer surface of the main section 12 of the first magnetic core 11a and the outer surface of the main section 12 of the second magnetic core 11b face away from each other.

[0050] In the present invention, however, the inner surface of the main section 12 can, for example, also be a convexly curved surface that is convex inwards, and the outer surface of the main section 12 can, for example, also be a convexly curved surface that is convex outwards.

[0051] Accordingly, in the present invention, the inner surfaces of the outer legs 13 can, for example, also be convexly curved surfaces that are convex inwards, and the outer surfaces of the outer legs 13 can, for example, also be convexly curved surfaces that are convex outwards.

[0052] Furthermore, the magnetic core 10 includes, for example, a first section around which the coil 90 is wound, and a second section around which the coil 90 is not wound.

[0053] With such a design, by arranging the second section of the magnetic core 10, around which the coil 90 is not wound, on the base section 30, it is possible to prevent the base section 30 from being in the way of the coil 90, while at the same time the magnetic core 10 is well supported by the base section 30.

[0054] In the present embodiment, the coil 90 is wound around central sections (central sections with respect to the direction of extension) of the main section 12 of the first magnetic core 11a and the second magnetic core 11b. Furthermore, a front end of the main section 12 projects forward from the coil 90, and a rear end of the main section 12 projects backward from the coil 90. The coil 90 is also not wound around the outer legs 13 of the first magnetic core 11a and the second magnetic core 11b. That is to say, in the present embodiment, the first section is formed by the central sections of the main section 12 of the first magnetic core 11a and the second magnetic core 11b, and the second section is formed by the front and rear ends of the central sections and the outer legs 13.

[0055] In the present embodiment, however, as described above, the entire lower surface of the magnetic core 10 forms a first convexly curved surface 14, which is convex downwards, and the entire upper surface forms a second convexly curved surface 15, which is convex upwards.

[0056] Therefore, in the case of the magnetic core 10, the section that forms a first section around which the coil 90 is wound is not limited to this example and can, for example, also be wound around the outer legs 13.

[0057] More precisely, in the present embodiment, the coils comprise 90, as shown in Fig. 1 and Fig. Figure 2 shows a first coil 91 wound around the first magnetic core 11a and a second coil 92 wound around the second magnetic core 11b.

[0058] The first coil 91 and the second coil 92 each comprise a winding 93. The winding 93 of the first coil 91 and the second coil 92 is each wound around the main section 12 of the corresponding partial core 11 (the first magnetic core 11a and the second magnetic core 11b). The winding 93 wound around the main section 12 forms a winding section 94 (see Fig. 2) Both ends of the windings 93 are electrically connected to a corresponding terminal element 80. For example, the two ends of the windings 93 are brought out from the winding section 94 and attached to the corresponding terminal element 80, thus electrically connecting them to the terminal element 80 (see Fig. 1) It should be noted that in Fig. 2 to Fig. 5 the sections (supply wires 95) which are led out from the winding section 94 into the windings 93, and the ends of the windings 93 are not shown.

[0059] As described above, the base body 20 comprises the base section 30, which is provided with the several connection elements and on which the magnetic core 10 is arranged, the cover section 60, which covers the magnetic core 10, and the connecting section 70, which connects the base section 30 and the cover section 60, these being formed in one piece.

[0060] As in Fig. 2, Fig. 3 and Fig. As shown in Figure 5, the cover section 60 is, for example, designed in the form of a flat plate and comprises a main body section 62, which is arranged horizontally. Furthermore, the main body section 62 is provided with positioning projection sections 66, which are described later. In the present embodiment, the facing surface 61 of the cover section 60 (i.e., the lower surface of the cover section 60), which faces the facing surface 31 of the base section 30, is formed by the lower surface of the main body section 62 and the lower surface 67 of the positioning projection sections 66. Furthermore, the facing surface 61 is arranged horizontally.

[0061] As in Fig. As shown in Figure 3, the main body section 62 is essentially rectangular in plan view. A cutout 63 is formed in a rear right side section of the main body section 62. The orientation of the cover section 60 and the base body 20 can be easily determined by this cutout 63.

[0062] Since the base body 20 includes the cover section 60, the cover section 60 can be suctioned into place by a mounting device when the coil component 100 is mounted on a substrate, thus facilitating the mounting process of the coil component 100 on the substrate. The cover section 60 does not necessarily need to be flat.

[0063] For example, in Fig. 2, Fig. 6, Fig. As shown in Figure 8, the base section 30 comprises, for example, core assembly sections 40 on which the magnetic core 10 is arranged. More precisely, the base section 30, as core assembly sections 40, comprises, for example, a pair of front and rear core assembly sections 40, that is, a first core assembly section 42, which is arranged on the front side, and a second core assembly section 44, which is arranged on the back side.

[0064] As in Fig. As shown in Figure 1, the first magnetic core 11a and the second magnetic core 11b are held in a state by the first core assembly section 42 and the second core assembly section 44 in which they are arranged in a rectangular ring shape in plan view.

[0065] Furthermore, the base section 30 includes a plate-shaped section 35 that connects the first core assembly section 42 and the second core assembly section 44.

[0066] In the present embodiment, the upper surface of the facing surface 31 (of the base section 30), which faces the facing surface 61 of the cover section 60, is formed by the upper surfaces of the first core arrangement section 42 and the second core arrangement section 44 and the upper surface of the plate-shaped section 35.

[0067] The plate-shaped section 35 has the form of a flat plate and is arranged horizontally. The flat shape of the plate-shaped section 35 is, for example, essentially rectangular.

[0068] A front edge of the plate-shaped section 35 is connected to the first core assembly section 42, and a rear edge of the plate-shaped section 35 is connected to the second core assembly section 44. Furthermore, the underside of the plate-shaped section 35 is flush with the underside of the first core assembly section 42 and the second core assembly section 44.

[0069] The first core arrangement section 42 and the second core arrangement section 44, for example, are essentially formed with the same shape and dimensions and can be arranged symmetrically to each other along the front-to-back direction.

[0070] More precisely, as in Fig. 5, Fig. 7 and Fig. As shown in Figure 8, the first core arrangement section 42 and the second core arrangement section 44, for example, have an essentially prismatic shape and extend from left to right. As e.g. in Fig. 1 and Fig. As shown in Figure 3, in the present embodiment, extension sections 45, which extend outwards, are formed at both ends of the second core arrangement section 44. As shown in Fig. As shown in Figure 1, the supply wire 95, which is led out from the coil 90, can be engaged by the extension section 45.

[0071] The first core assembly section 42 and the second core assembly section 44 are each provided with several connection elements 80 (details of which will be described later).

[0072] As in Fig. As shown in Figure 3, in the present embodiment the outer legs 13 are arranged at the front of the first magnetic core 11a and the outer legs 13 are arranged at the front of the second magnetic core 11b in the middle (in the middle with respect to the direction of extension) of the first core arrangement section 42.

[0073] Accordingly, the outer legs 13 are located on the rear side of the first magnetic core 11a and the outer legs 13 are located on the rear side of the second magnetic core 11b in the middle (with respect to the direction of extension) of the second core arrangement section 44.

[0074] As in Fig. As shown in Figure 3, the main sections 12 of the first magnetic core 11a and the second magnetic core 11b are each arranged above the first core assembly section 42 and the second core assembly section 44.

[0075] More precisely, the front end of the main section 12 of the first magnetic core 11a, which extends forward from the coil 90, is located at the left end of the first core assembly section 42, and the rear end, which extends backward from the coil 90, is located at the left end of the second core assembly section 44.

[0076] Accordingly, the front end of the main section 12 of the second magnetic core 11b, which extends forward from the coil 90, is located at the right end of the first core assembly section 42, and the rear end, which extends backward from the coil 90, is located at the right end of the second core assembly section 44.

[0077] For example, in the Fig. 3, Fig. 7, Fig. As shown in Figure 8, the connecting section 70, for example, connects a central area of ​​the base section 30 and a central area of ​​the cover section 60.

[0078] More precisely, in the present embodiment, the connecting section 70 is designed in the form of a flat plate and is arranged such that the plate surfaces face left and right. The upper surface of the connecting section 70 is connected to the central region of the underside of the main body section 62 of the cover section 60, and the underside of the connecting section 70 is connected to the central region of the upper surface of the plate-shaped section 35 of the base section 30. In this way, the connecting section 70 connects the base section 30 and the cover section 60 to each other in a state in which the base section 30 and the cover section 60 are vertically aligned. Furthermore, the upper surface of the plate-shaped section 35 and the underside of the main body section 62 of the cover section 60 are vertically aligned and parallel to each other.

[0079] In the present embodiment, both the first magnetic core 11a and the second magnetic core 11b are formed in one piece from a magnetic material.

[0080] The entire basic body 20 (the base section 30, the cover section 60 and the connecting section 70) is formed in one piece from an insulating material, such as plastic.

[0081] In the present embodiment, the multiple sub-cores 11 (the first magnetic core 11a and the second magnetic core 11b) surround the circumference of the connecting section 70.

[0082] With such a design, it is possible to easily mount the multiple sub-cores 11 onto the base body 20, whereby a closed magnetic path is formed by the multiple sub-cores 11.

[0083] More precisely, in the present embodiment, as described in Fig. Figure 3 shows that the front end surface of the outer leg 13 at the front of the first magnetic core 11a and the front end surface of the outer leg 13 at the front of the second magnetic core 11b are in contact with each other. Similarly, the front end surface of the outer leg 13 at the rear of the first magnetic core 11a and the front end surface of the outer leg 13 at the rear of the second magnetic core 11b are in contact with each other.

[0084] Furthermore, in the present embodiment, the front end surface of the outer leg 13 is attached to the front of the first magnetic core 11a and the front end surface of the outer leg 13 is attached to the front of the second magnetic core 11b, for example, by an adhesive (not shown in the figures). Similarly, the front end surface of the outer leg 13 is attached to the rear of the first magnetic core 11a and the front end surface of the outer leg 13 is attached to the rear of the second magnetic core 11b by an adhesive (not shown in the figures).

[0085] In this way, the first magnetic core 11a and the second magnetic core 11b are integrally connected, forming the magnetic core 10, which has a ring shape in plan view. Furthermore, the ring-shaped magnetic core 10 is held by the base body 20 in a position in which it is arranged around the connecting section 70.

[0086] Furthermore, as in Fig. Figure 4 shows that, when viewed along the direction in which the base section 30 and the cover section 60 face each other, the entire magnetic core 10 is located within the outline of the base section 30.

[0087] In this context, "the entire magnetic core 10 is located within the outline of the base section 30" means that the outline of the magnetic core 10 does not protrude outwards from the outline of the base section 30 when viewed from above, although the outline of the magnetic core 10 may also overlap the outline of the base section 30.

[0088] With such a design, when the coil component 100 is mounted on the substrate, a section at which the cover section 60 is suctioned by a mounting device can be held securely enough so that the coil component 100 can be easily mounted on the substrate.

[0089] More precisely, in the present embodiment, the longitudinal dimension of the entire base section 30 (the core assembly section 40 and the plate-shaped section 35) is essentially equal to the longitudinal dimension of the magnetic core 10 (i.e., the combination of the first magnetic core 11a and the second magnetic core 11b). Accordingly, the horizontal dimension of the entire base section 30 (the core assembly section 40 and the plate-shaped section 35) is essentially equal to the horizontal dimension of the magnetic core 10 (i.e., the combination of the first magnetic core 11a and the second magnetic core 11b).

[0090] As in Fig. As shown in Figure 6, the outer surface of the main section 12 of the first magnetic core 11a is arranged substantially flush with the left-hand end surface of the base section 30, and the outer surface of the main section 12 of the second magnetic core 11b is arranged substantially flush with the right-hand end surface of the base section 30. As shown in Fig. As shown in Figure 4, the outer surfaces of the outer leg 13 on the front of the first magnetic core 11a and of the outer leg 13 on the front of the second magnetic core 11b are arranged substantially flush with the front end surface of the base section 30. Similarly, the respective outer surfaces of the outer leg 13 on the rear of the first magnetic core 11a and of the outer leg 13 on the rear of the second magnetic core 11b are also arranged substantially flush with the rear end surface of the base section 30.

[0091] As in Fig. As shown in Figure 3, when viewed along the direction in which the base section 30 and the cover section 60 face each other, the entire magnetic core 10 is located within the outline of the cover section 60.

[0092] In this context, "the entire magnetic core 10 is located within the outline of the cover section 60" means that the outline of the magnetic core 10 does not protrude outwards from the outline of the cover section 60 when viewed from above, although the outline of the magnetic core 10 may overlap the outline of the cover section 60.

[0093] With such a configuration, each of the several sub-cores 11, i.e. the entire magnetic core 10, can be well supported by the base section 30.

[0094] More precisely, in the present embodiment, the longitudinal dimension of the entire cover section 60 (or the core arrangement sections 40 and the plate-shaped section 35) is essentially equal to the longitudinal dimension of the magnetic core 10 (i.e., the combination of the first magnetic core 11a and the second magnetic core 11b). Accordingly, the horizontal dimension of the entire cover section 60 (or the core arrangement sections 40 and the plate-shaped section 35) is essentially equal to the horizontal dimension of the magnetic core 10 (i.e., the combination of the first magnetic core 11a and the second magnetic core 11b).

[0095] As in Fig. As shown in Figure 6, the outer surface of the main section 12 of the first magnetic core 11a is arranged substantially flush with the left-hand end surface of the cover section 60, and the outer surface of the main section 12 of the second magnetic core 11b is arranged substantially flush with the right-hand end surface of the cover section 60. As shown in Fig. As shown in Figure 4, the respective outer surfaces of the outer leg 13 on the front of the first magnetic core 11a and of the outer leg 13 on the front of the second magnetic core 11b are arranged substantially flush with the front end surface of the cover section 60. Similarly, the respective outer surfaces of the outer leg 13 on the rear of the first magnetic core 11a and of the outer leg 13 on the rear of the second magnetic core 11b are arranged substantially flush with the rear end surface of the cover section 60.

[0096] As in Fig. 1, Fig. 5 and Fig. As shown in Figure 6, the cover section 60 further comprises the positioning projection sections 66 for positioning the magnetic core 10.

[0097] The positioning projection sections 66 extend from the facing surface 61 of the cover section 60 in the direction of the magnetic core 10 and limit a movement of the magnetic core 10 to the cover section 60 along the direction in which the base section 30 and the cover section 60 face each other.

[0098] Thus, the height position of the magnetic core 10 relative to the base body 20 can be easily adjusted in the vertical direction. Furthermore, rattling of the magnetic core 10 in the vertical direction can be advantageously prevented.

[0099] Furthermore, in the present embodiment, as e.g. in Fig. 6 and Fig. 11B shown, in areas of the facing surface 31 of the base section 30 (in the present embodiment the upper surfaces of the core arrangement sections 40 concave sections 46 are recessed in a direction away from the magnetic core 10, and the first convex curved surfaces 14 of the magnetic core 10 are arranged in these concave sections 46.

[0100] Thus, the magnetic core 10, which has the first convexly curved surfaces 14, can be securely held by the base section 30.

[0101] More precisely, at least part of the first convex curved surfaces 14 of the second section (in the present embodiment the pair of outer legs 13) of the magnetic core 10 is arranged in the concave sections 46.

[0102] Thus, it is possible to prevent the coil 90 from being in the way of the base section 30, while at the same time the magnetic core 10 is securely held by the base section 30.

[0103] Furthermore, the concave section 46 includes a concave curved surface 47, which is recessed in the direction away from the magnetic core 10, and this concave curved surface 47 is in surface contact with the respective first convex curved surface 14 of the magnetic core 10. That is, the first convex curved surface 14 engages with the concave curved surface 47.

[0104] Thus, the magnetic core 10 can be easily positioned relative to the base section 30. Furthermore, it is also possible to prevent any relative displacement of the position of the magnetic core 10 relative to the base section 30.

[0105] It should be noted that in the present invention it is sufficient if at least a section of the first convex curved surface 14 is in surface contact with the concave curved surface 47. That is, it is sufficient if at least a section of the first convex curved surface 14 engages with the concave curved surface 47.

[0106] For example, in Fig. 1, Fig. 3, Fig. 5, Fig. As shown in Figure 6, in the present embodiment the upper surface of the core arrangement sections 40 (of the first core arrangement section 42 and of the second core arrangement section 44) forms the concave sections 46 and thus also the concave curved surface 47.

[0107] More precisely, they form, as in Fig. 7 and Fig. 8 shown, the upper surfaces of the left end and the right end of the core arrangement sections 40 each form a concave curved surface corresponding to the first convex curved surfaces 14 of the main section 12 of the magnetic core 10, and the upper surfaces of their middle section (the section between the left end and the right end) form concave curved surfaces corresponding to the first convex curved surfaces 14 of the outer legs 13.

[0108] More precisely, an outer section 49a, which is arranged on the outside of a virtual line 201, which is in Fig. 9 and Fig. Figure 11B shows a portion of the concavely curved surface 47 on the top surface of the left and right ends of the core assembly sections 40 (the first core assembly section 42 and the second core assembly section 44). It should be noted that the virtual line 201 here is a straight line that divides the core assembly section 40 in plan view into two equal parts along the direction in which the core assembly section 40 extends (i.e., from left to right).

[0109] As in Fig. 11A and Fig. As shown in Figure 11B, the outer section 49a, when viewed in the direction in which the core assembly section 40 extends (i.e., from left to right), forms a concavely curved surface that slopes downwards from a position slightly inward from the outer side edge of the outer section 49a to a position in the middle (the position of virtual line 201) of the top surface of the core assembly section 40. A small section at the outer side edge of the outer section 49a is flat.

[0110] On the other hand, an inner section 49b within the virtual line 201 on the top of the left end and the right end of the core arrangement section 40 is essentially planar and horizontally arranged.

[0111] In the present embodiment, the front end of the first convex curved surface 14 of the main section 12 of the first magnetic core 11a is in surface contact with and engages with the upper surface of the left end of the first core assembly section 42, and the rear end of the first convex curved surface 14 is in surface contact with and engages with the upper surface of the left end of the second core assembly section 44. Similarly, the front end of the first convex curved surface 14 of the main section 12 of the second magnetic core 11b is in surface contact with and engages with the upper surface of the right end of the first core assembly section 42, and the rear end of the first convex curved surface 14 is in surface contact with and engages with the upper surface of the right end of the second core assembly section 44. As shown in Fig. As shown in Figure 11B, the outer side edge section of the outer section 49a of the core arrangement section 40 is partially planar, and a planar side edge section of the lower surface of the main section 12 is in surface contact with this planar section. Accordingly, the relative displacement of the main section 12 outwards with respect to the concave section 46 can be limited.

[0112] On the other hand, essentially the entire upper surface of the middle sections of the core arrangement sections 40 (of the first core arrangement section 42 and of the second core arrangement section 44) forms part of the concave curved surface 47.

[0113] More precisely, both the outer section 49a outside the virtual line 201 and the inner section 49b inside the virtual line 201 form concave curved surfaces on the top of the middle sections of the core arrangement sections 40.

[0114] More precisely, an inner section within the virtual line 201 in the middle sections of the core arrangement sections 40 forms a raised section 48 (see Fig. 11A and Fig. 11B), which gradually projects inwards and upwards. When viewed in the direction in which the core assembly section 40 extends (i.e., along the left-to-right direction), the upper surface of the raised section 48 forms a concavely curved surface that slopes inwards from a position in the middle (the position of virtual line 201) of the top surface of the core assembly section 40. Thus, the top surface (the inner section 49b) of the raised section 48 and the outer section 49a of the top surface of the core assembly section 40 form a concavely curved surface 47 that is recessed downwards.

[0115] In the present embodiment, the first convexly curved surface 14 of the outer legs 13 on the front side of the first magnetic core 11a and the second magnetic core 11b is in surface contact with the top side of the middle section of the first core assembly section 42. Accordingly, the first convexly curved surface 14 of the outer legs 13 on the back side of the first magnetic core 11a and the second magnetic core 11b is in surface contact with the top side of the middle section of the second core assembly section 44.

[0116] With such a design, the magnetic core 10 can be arranged in the core assembly section 40 in such a way that both the first convex curved surface 14 of the main section 12 and the first convex curved surface 14 of the outer legs 13 are brought into surface contact with the top (of the concave curved surface 47) of the core assembly section 40.

[0117] In the present embodiment, a maximum depth (D2, which is in Fig. 11A) of the concave section 46, e.g. preferably at least 1 / 20 and at most 1 / 5 of the maximum thickness dimension (T2, see Fig. 10B) of the magnetic core 10 and preferably at least 1 / 15 at most 1 / 10 of the maximum thickness dimension T2 of the magnetic core 10.

[0118] As described above, the cover section 60 further comprises the positioning projection sections 66 for positioning the magnetic core 10. In the present embodiment, the cover section 60 has, as shown in Fig. 5 and Fig. Figure 8 shows a pair of front and rear positioning protrusion sections 66.

[0119] The pair of front and rear positioning projection sections 66, for example, is formed with the same shape and dimensions and can be arranged symmetrically along the front to rear direction.

[0120] The positioning projection sections 66 on the front face extend, for example, downwards from a lower surface of a front end of the main body section 62 of the cover section 60. Furthermore, the positioning projection section 66 on the front face has a substantially rectangular cuboid shape extending from front to rear, and a rear end of this positioning projection section 66 is connected to a front end face of the connecting section 70. A front end face of the positioning projection section 66 on the front face is flush with a front end face of the main body section 62. The lower surface 67 of the positioning projection section 66 on the front face is flat and horizontally oriented.The left side surface of the positioning projection section 66 on the front side is flush with the left side surface of the connecting section 70, and the right side surface of the positioning projection section 66 is flush with the right side surface of the connecting section 70.

[0121] Accordingly, the positioning projection section 66 extends downwards from the lower surface of the rear end of the main body section 62 of the cover section 60. Furthermore, the positioning projection section 66 has a substantially rectangular cuboid shape on the rear side, extending from front to back, and a front end of the positioning projection section 66 is connected to a rear end surface of the connecting section 70. A rear end surface of the positioning projection section 66 on the rear side is flush with a rear end surface of the main body section 62. The lower surface 67 of the positioning projection section 66 on the rear side is flat and horizontally oriented.The left side surface of the positioning projection section 66 on the rear side is flush with the left side surface of the connecting section 70, and the right side surface of the positioning projection section 66 is flush with the right side surface of the connecting section 70.

[0122] As in Fig. As shown in Figure 6, the positioning projection section 66 is arranged on the front side above the boundary between the outer leg 13 on the front side of the first magnetic core 11a and the outer leg 13 on the front side of the second magnetic core 11b. A small gap is formed between the lower surface 67 of the positioning projection section 66 on the front side and the upper surfaces of the outer leg 13 on the front side of the first magnetic core 11a and the outer leg 13 on the front side of the second magnetic core 11b.

[0123] Accordingly, the positioning projection section 66 is arranged on the rear side above the boundary between the outer leg 13 on the rear side of the first magnetic core 11a and the outer leg 13 on the rear side of the second magnetic core 11b. A small gap is formed between the lower surface 67 of the positioning projection section 66 on the rear side and the upper surfaces of the outer leg 13 on the rear side of the first magnetic core 11a and the outer leg 13 on the rear side of the second magnetic core 11b.

[0124] With this design, the first magnetic core 11a and the second magnetic core 11b can be easily positioned in the vertical direction with respect to the base body 20. Furthermore, rattling of the first magnetic core 11a and the second magnetic core 11b in the vertical direction can be prevented.

[0125] In the present embodiment, the shortest distance (D1 in Fig. 5) between the lower surface 67 of the positioning projection section 66 and the second convexly curved surface 15 in the vertical direction smaller than the separation distance (D3 in Fig. 6) between the upper end of the winding section 94 and the lower surface of the main body section 62.

[0126] With this design, the first magnetic core 11a and the second magnetic core 11b can be positioned with high accuracy in the vertical direction with respect to the base body 20. Furthermore, rattling of the first magnetic core 11a and the second magnetic core 11b in the vertical direction can be more reliably prevented. In addition, when the magnetic core 10 moves upwards from the core assembly section 40, the second convexly curved surface 15 first contacts the lower surface 67 of the positioning projection section 66, thus preventing wear of the insulating coating of the winding 93 caused by the winding 93 contacting the lower surface of the main body section 62.

[0127] As described above, the coil component 100 comprises the several (for example, four) connection elements 80 that are electrically connected to the coil 90.

[0128] In the present embodiment, each of the several connecting elements 80 is designed with the same shape and the same dimensions.

[0129] Here, as for example in the Fig. 8 to Fig. Figure 12B shows that fitting recesses 50 are formed in the base section 30, and the connecting elements 80 are fitted into the fitting recesses 50 by means of fitting structures (in the present embodiment several projections 55, which will be described later).

[0130] With such a configuration, the connecting element 80 can be easily attached to the core assembly section 40 without the use of an adhesive or the like.

[0131] More precisely, the base section 30 in the present embodiment comprises, as in Fig. 8 is shown as the pass recesses 50 form a pair of first left and right pass recesses 51 formed in the first core assembly section 42 and a pair of second left and right pass recesses 52 formed in the second core assembly section 44.

[0132] Of the four connection elements 80, two connection elements 80 (hereinafter referred to as first connection element 81) are fitted into the first fitting recess 51, and the other two connection elements 80 (hereinafter referred to as second connection element 82) are fitted into the second fitting recess 52.

[0133] The first connection elements 81 are arranged symmetrically to each other in the first core assembly section 42. Accordingly, the second connection elements 82 are also arranged symmetrically to each other in the second core assembly section 44.

[0134] The connecting elements 80 are, for example, formed into a Z-shape by bending a long, plate-shaped metal element (see Fig. 6 and Fig. 12B).

[0135] More precisely, each terminal element 80 is bent in two stages along its longitudinal direction, with one end and the other end of the terminal element 80 being vertically spaced apart and arranged horizontally, while an intermediate section (hereinafter referred to as the vertical section 87) (intermediate section in the longitudinal direction) is arranged vertically between the one end and the other end. Furthermore, one end of the terminal element 80 projects inwards and is located on the lower side with respect to the vertical section 87, while the other end projects outwards and is located on the upper side. In this connection, one end of the terminal element 80 is an external terminal 85, which is connected externally when the coil component 100 is mounted, and the other end is an internal terminal 86, which is connected to the winding 93 of the coil 90.

[0136] As in Fig. As shown in Figure 4, the external ports 85 are formed in plan view with a substantially rectangular shape extending from left to right. Accordingly, as shown in Fig. As shown in Figure 11B, the vertical section 87, viewed from left to right, has a substantially rectangular shape extending in a vertical direction.

[0137] On the other hand, the internal terminal 86 is configured in a forked shape that opens towards the front end (outwards). For example, the ends of the supply wire 95 (of the winding wire 93 of the coil 90), which extend from the winding section 94 of the coil 90, can be attached to the internal terminals 86 by resistance welding in such a way that they are clamped by the respective forked section of the internal terminals 86. However, in the present invention, the method for attaching the winding 93 to the internal terminals 86 is not limited to this example, and the winding can also be attached, for example, by gluing or soldering.

[0138] In the present embodiment, the pair of first left and right fitting recesses 51 are formed with the same shape and dimensions and can be arranged symmetrically. Similarly, the pair of second left and right fitting recesses 52 are formed with the same shape and dimensions and can be arranged symmetrically. Furthermore, the first fitting recesses 51 and the second fitting recesses 52 can be formed with the same shape and dimensions.

[0139] More precisely, in the present embodiment, the fitting structure in which the connecting elements 80 are fitted into the fitting recesses 50 is formed by one or more projections 55 (in the present embodiment six projections 55).

[0140] To fit the connecting elements 80 into the fitting recesses 50, the connecting elements 80 are pressed into the fitting recesses 50, whereby the several projections 55 are pressed together.

[0141] With such a configuration, the connecting element 80 can be easily attached to the core assembly section 40 without the use of an adhesive or the like. Furthermore, if the size of the connecting elements 80 varies with respect to the fitting recesses 50, the projections 55 can accommodate this size variation.

[0142] In the present invention, however, the method for attaching the connecting elements 80 to the core arrangement section 40 (base section 30) is not limited to this fitting structure, and the connecting elements 80 can also be attached to the base section 30, for example, by a method such as overmolding, crimping or gluing.

[0143] More precisely, the pass recess comprises 50 (or the first pass recesses 51 and the second pass recesses 52), as in Fig. 11A and Fig. Figure 12A shows a pair of first face sections 53 facing each other and a pair of second face sections 54 facing each other. Here, Fig. 7, Fig. 8, Fig. 11A and Fig. 12A represents the base body 20 in a state before the connecting elements 80 are pressed into the fitting recesses 50.

[0144] As in Fig. 11B and Fig. As shown in Figure 12B, the vertical section 87 of the connection element 80 is arranged between the pair of first side surface sections 53, with the internal connection 85 of the connection element 80 being arranged between the pair of second side surface sections 54.

[0145] The projections 55 comprise several (for example, four) first projections 56 formed on the pair of first side surface sections 53, and several (for example, two) second projections 57 formed on the pair of second side surface sections 54.

[0146] In the present embodiment, two first projections 56 are formed on each of the pair of first side surface sections 53. These projections, as shown in Fig. As shown in Figure 11B, the first projections 56 formed on one first side surface section 53 project towards the vertical section 87 of the connecting element 80 and are pressed together by the vertical section 87 and the first side surface section 53. Similarly, the first projections 56 formed on the other first side surface section 53 project towards the vertical section 87 of the connecting element 80 and are pressed together by the vertical section 87 and the other first side surface section 53.The vertical section 87 is fitted into the pass recesses 50 in a state in which it is pressed by the first projections 56 formed on one first side surface section 53 in the direction of the other first side surface section 53 and is pressed by the first projections 56 formed on the other first side surface section 53 in the direction of the one first side surface section 53.

[0147] Furthermore, two second projections 57 are formed on each of the pair of second side surface sections 54. The second projections 57 formed on the pair of second side surface sections 54 project in the direction of the external connection 85 of the connection element 80 and are pressed together by the external connection 85 and the second side surface section 54. The second projections 57 formed on the other second side surface section 54 also project in the direction of the external connection 85 of the connection element 80 and are pressed together by the external connection 85 and the second side surface section 54.The external connection 85 is fitted into the recesses 50 in a state in which it is pressed by the second projections 57 formed on one second side surface section 54 in the direction of the other second side surface section 54 and is pressed by the second projections 57 formed on the other second side surface section 54 in the direction of the one second side surface section 54.

[0148] As in Fig. 3 and Fig. As shown in Figure 4, the external connections 85 and the vertical section 87 of the connection elements 80 are each located within the fitting recesses 50 and the outline of the base section 30 in plan view. Conversely, the internal connection 86 of the connection elements 80 projects outwards from the fitting recesses 50 and the outline of the base section 30 in plan view.

[0149] In the present embodiment, the connecting elements 80 are each fitted into the corresponding recesses 50.

[0150] The coil component 100 according to the present embodiment is configured as described above. For example, the coil component 100 can be used as a common-mode choke. However, the application of the coil component 100 is not limited to this example.

[0151] The assembly of coil component 100 can be carried out, for example, as follows.

[0152] First, the windings 93 of the coils 90 (of the first coil 91 and the second coil 92) are wound around the main section 12 of the first magnetic core 11a and the second magnetic core 11b.

[0153] The first magnetic core 11a and the second magnetic core 11b are then arranged on the core assembly sections 40. More precisely, the outer leg 13 of the first magnetic core 11a is placed on the upper side of the left end of the first core assembly section 42 from the front, and the outer leg 13 of the second magnetic core 11a is placed on the upper side of the left end of the second core assembly section 44 from the rear. Similarly, the outer leg 13 of the second magnetic core 11b is placed on the upper side of the right end of the first core assembly section 42 from the front, and the outer leg 13 of the second magnetic core 11b is placed on the upper side of the right end of the second core assembly section 44 from the rear. In this way, the magnetic core 10 is positioned between the facing surface 61 of the cover section 60 and the facing surface 31 of the base section 30.The first convex curved surfaces 14 of the magnetic core 10 engage with the concave sections 46 (the concave curved surfaces 47) of the core arrangement sections 40.

[0154] The first magnetic core 11a and the second magnetic core 11b are then bonded together using an adhesive (not shown in the figures). This forms the magnetic core 10, which has a ring shape when viewed from above.

[0155] As described above, the cover section 60 here has positioning projection sections 66 that limit movement of the magnetic core 10 towards the cover section 60. Therefore, for example, the relative positions between the first magnetic core 11a and the second magnetic core 11b, and the desired relative positions between the magnetic core 10 and the base body 20 in the vertical direction, can be easily implemented without the use of a special clamping device. Therefore, the manufacturing of the coil component 100 can be simplified.

[0156] The ends of the windings 93 of the coil 90 are then attached to the internal terminal 86 of the corresponding terminal element 80. In the present embodiment, the ends of the windings 93 are attached to the internal terminal 86, for example, by resistance welding.

[0157] In this way, the coil component 100 is obtained.

[0158] Although the embodiment described above with reference to the figures, these are examples of the present invention, and configurations other than those mentioned above may also be used.

[0159] The above description, for example, describes an instance in which the magnetic core 10 contains two U-cores as sub-cores 11. However, the present invention is not limited to this example, and the magnetic core 10 can also contain a U-core and an I-core, an E-core and an I-core, or two E-cores as sub-cores 11.

[0160] It should be noted that in a case where the magnetic core 10 contains an I-core as a sub-core 11, as in Fig. 13A and Fig. As shown in Figure 13B, preferably also in the I-core, a surface facing the base section 30 is a first convexly curved surface 14 that is convex towards the base section 30, and a surface facing the cover section 60 is a second convexly curved surface 15 that is convex towards the cover section 60. In this case, at least one section of the surface facing the cover section 60 in the I-core can be the second convexly curved surface 15, as shown in Fig. 13A shown, or the entire surface facing the cover section 60 can be the second convexly curved surface 15. Accordingly, at least one section of the surface of the I-core facing the base section 30 can be the first convexly curved surface 14, or the entire surface facing the base section 30 can be the first convexly curved surface 14.

[0161] If the magnetic core 10 contains an E-core as a sub-core 11, then the surface of the E-core facing the base section 30 is preferably the first convexly curved surface 14, which is convex towards the base section 30, and the surface facing the cover section 60 is preferably the second convexly curved surface 15, which is convex towards the cover section 60. In this case, at least a section of the surface facing the cover section 60 in the E-core can be the second convexly curved surface 15, or the entire surface facing the cover section 60 can be the second convexly curved surface 15. Accordingly, at least a section of the surface of the E-core facing the base section 30 can be the first convexly curved surface 14, or the entire surface facing the base section 30 can be the first convexly curved surface 14.

[0162] Furthermore, the above description gave an example in which the magnetic core 10 is divided into two sub-cores 11. However, the magnetic core 10 can also be divided into three or more sub-cores 11, for example.

[0163] Although an example was described above in which the coils 90 are wound directly around the magnetic core 10, the present invention is not limited to this example and the coils 90 can, for example, also be wound indirectly around the magnetic core 10 via a coil former section (not shown in the figures). In this case, the coil former section is preferably formed by a section of the base body 20.

[0164] The present embodiment comprises the following technical ideas. (1) A coil component comprising the following: a magnetic core that is ring-shaped and divided into several sub-cores in the circumferential direction; a coil wound around the magnetic core; a base body that holds the magnetic core; and several metal connection elements, each electrically connected to the coil, wherein the base body, in one-piece design, comprises a base section which is provided with the several connecting elements and on which the magnetic core is arranged, a cover section which covers the magnetic core, and a connecting section which connects the base section and the cover section together. (2) coil component according to (1) wherein the base section and the cover section each have surfaces facing each other, the connecting section is arranged between the facing surfaces of the base section and the cover section and connects the facing surfaces together, and the multiple sub-cores are arranged on the facing surface of the base section. (3) coil component according to (2), wherein the connecting section connects a central area of ​​the base section and a central area of ​​the cover section, and the multiple sub-cores surround a circumference of the connecting section. (4) Coil component according to (2) or (3), wherein the entire magnetic core, when viewed along the direction in which the base section and the cover section face each other, is within the outline of the base section. (5) Coil component according to any one of (2) to (4), wherein the entire magnetic core, when viewed along the direction in which the base section and the cover section face each other, is within the outline of the cover section. (6) coil component according to one of (2) to (5), wherein the cover section includes a positioning projection section for positioning the magnetic core, and The positioning projection section extends from the facing surface of the cover section in the direction of the magnetic core and limits movement of the magnetic core to the cover section along the direction in which the base section and the cover section face each other. (7) Coil component according to any one of (2) to (6), wherein an entire area on the base section side of the magnetic core is a first convex curved surface which is convex towards the base section, and an entire area on the cover section side of the magnetic core is a second convex curved surface which is convex towards the cover section. (8) coil component according to (7), wherein in a section of the facing surface of the base section a concave section is formed which is recessed in one direction away from the magnetic core, and the first convex curved surface of the magnetic core is located in the concave section. (9) coil component according to (8), wherein the magnetic core comprises a first section around which the coil is wound, and a second section around which the coil is not wound, and at least one section of the first convexly curved surface of the second section is arranged in the concave section. (10) coil component according to (8) or (9), wherein the concave section comprises a concave curved surface that is recessed in one direction away from the magnetic core, and The concave curved surface is in surface contact with the first convex curved surface of the magnetic core. (11) coil component according to one of (1) to (10), wherein The base section has passable recesses, and The connecting elements are fitted into the recesses using fitting structures. REFERENCE MARK LIST 10 magnetic core 11 subcore 11a First magnetic core (subcore) 11b Second magnetic core (sub-core) 12 Main Section 13 Outer thigh 14 First convex curved surface 15 Second convex curved surface 20 basic shapes 30 Basic section 31 Facing surface 35 Plate-shaped section 40 Core Arrangement Section 42 First core arrangement section 44 Second core arrangement section 45 Extension section 46 Concave Section 47 Concave curved surface 48 Sublime Section 49a Outer section 49b Inner Section 50 Passport recess 51 pairs of first left and right pass recesses 52 pairs of second left and right pass recesses 53 pairs of first side surface sections 54 pairs of second side surface sections 55 lead 56 First lead 57 Second lead 60 Cover section 61 Facing surface 62 Basic shapes 63 Excerpt 66 Positioning Advantage Section 67 Lower surface 70 Connecting section 80 Connection element 81 First connection element 82 Second connection element 85 External connection (one end) 86 Internal connection (other end) 87 Vertical Section 90 coil 91 First coil 92 Second coil 93 windings 94 Winding section 95 supply wire 100 coil components 201 Virtual Management QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP H02 - 146707 A

[0004]

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