Magnetic component

Abstract

To provide a magnetic component capable of reducing an influence of an eddy current loss due to a leakage flux generated from a gap 18.SOLUTION: A magnetic component 1 comprises a coil 10, a core 14, and a bobbin 16. The coil 10 is constructed by the number of windings that is one or less of a conductive member. The core 14 includes a gap 18 in which a magnetic path is not formed, at one part. The bobbin 16 includes: a coil positioning part 22 that positions the coil 10 so that a distance between the gap 18 and the coil 10 becomes a predetermined dimension; and a core positioning part that positions the core 14 so that the distance between the lowest surface of the core 14 and the lowest surface of the bobbin 16 becomes a predetermined dimension. The lowest surface of the bobbin is positioned below the lowest surface of the core, and the bobbin 16 is provided so that the lowest surface of the bobbin is mounted on an upper surface of an external substrate.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a magnetic component using a bobbin, the magnetic component including a coil, a core, and a bobbin. [Background technology]

[0002] When forming a one-turn coil, which is a magnetic component, the core shape is often a toroidal or UU (UI) type with a one-turn through type that has a wire passing through the center hole.When forming a one-turn coil, the core shape is often a toroidal or UU (UI) type with a one-turn through type that has a wire passing through the center hole.

[0003] Patent Document 1 discloses an inductor including a dust core and a coil. The dust core has at least one through hole. Each through hole penetrates the dust core in the up-down direction and has an inner peripheral surface in a horizontal plane perpendicular to the up-down direction. The dust core has an outer peripheral surface in the horizontal plane. The coil is partially located inside each through hole and is wound so as not to cover the outer periphery. The outer periphery has a shape without corners in the horizontal plane. Each inner peripheral surface has a shape without corners in the horizontal plane.

[0004] Patent Document 2 discloses a coil with a low-cost and easy-to-manufacture structure in which a busbar is inserted into a core and fixed with a strip-shaped member to achieve a one-turn through shape. The coil includes a core with two through holes, a U-shaped busbar with plate-shaped parts facing each other, a bobbin that insulates the core and busbar, a busbar with its plate-shaped part inserted into the through hole, and a tape that fixes the bobbin and the busbar to the core. Furthermore, the busbar is made of a U-shaped member formed by flatwise bending a metal plate.

[0005] Patent Document 3 discloses a transformer with a laminated one-turn coil. A primary coil, which is a laminate of a roughly U-shaped one-turn coil punched out of copper plate, is inserted into a frame-shaped box case made of insulating resin, and the frame-shaped box case is then mated. The other primary coil is also assembled into the case in the same way as the primary coil, and a secondary coil, which is a punched roughly U-shaped one-turn coil, is sandwiched between the two to form the coil section of the transformer. An E-shaped core made of ferrite is then assembled to form a large current transformer.

[0006] Patent Document 4 discloses a high-voltage transformer that achieves miniaturization. In this high-voltage transformer, which is composed of a core, a bobbin with a hollow hole that can be attached to the core, and a coil wound around the bobbin, flanges are provided on both ends of the bobbin, a primary coil is configured on one side of the flange with a one-turn coil made of a U-shaped conductor, and one terminal of the secondary coil wound in a single-layer aligned winding between the flanges on both ends of the bobbin is wired to a secondary terminal through between the terminals of the primary coil. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent Publication No. 2021-022724 [Patent Document 2] JP 2020-064979 A [Patent Document 3] JP 2000-223320 A [Patent Document 4] Japanese Patent Application Publication No. 10-223459 Summary of the Invention [Problem to be solved by the invention]

[0008] When forming a one-turn coil, which is a magnetic component, and applying it to a choke coil like a resonant choke coil, which has features such as a ferrite core being used as the core material to suppress core loss, a large gap, strict L value tolerance, and large leakage flux so the effects of eddy current loss cannot be ignored, the toroidal type or UU (UI) type present the following challenges:

[0009] That is, a bobbin or case is used to provide insulation between the core and the wire, but if there is nothing to fix and support the wire, it will have to be wound around the center core while touching it. Then, magnetic flux leaking from the gap in the center of the core will cause large eddy current losses in the wire, generating heat.

[0010] The above problem occurs when using a conventional bobbin for a general transformer. In addition, if the wire is simply wound around the bobbin, the position of the wire will not be fixed and will move, so it will be necessary to fix it in place with tape or something similar when mounting it. There is also the problem that a fixing stand or the like must be provided for the pull-out part to be mounted on the board, which requires extra materials and labor for fixing. Also, for resonant coils and coils used in high-voltage circuits, a creepage distance from the core is often required.

[0011] Conventional bobbins for general transformers are not designed to ensure a sufficient distance from the outer leg core, and are therefore easily moved and touched, resulting in the problem of insulation being lost.

[0012] To address this issue, it was necessary to use triple-insulated wire, wrap the wire in insulating tape or tube, or provide a separate resin case to protect the core.

[0013] An object of the present invention is to provide a magnetic component that solves the above problems. [Means for solving the problem]

[0014] The magnetic component (1) of the present invention comprises a coil (10), a core (14), and a bobbin (16), the coil (10) being formed of a conductive material with one or less turns, the core (14) having a gap (18) in a portion where no magnetic path is formed, the bobbin (16) having a coil positioning portion (22) that positions the coil (10) so that the distance between the gap (18) and the coil (10) is a predetermined dimension, and a core positioning portion (16c) that positions the core (14) so ​​that the distance between a bottom surface (14a) of the core (14) and a bottom surface (16a) of the bobbin is a predetermined dimension, the bobbin bottom surface (16a) is located below the core bottom surface (14a), and the bobbin (16) is provided so that the bobbin bottom surface (16a) is placed on an upper surface (100a) of an external substrate (100).

[0015] According to the present invention, the bobbin (16) has a coil positioning portion (22) that positions the coil (10) so that the distance between the gap (18) and the coil (10) is a predetermined dimension, and a core positioning portion (16c) that positions the core (14) so ​​that the distance between the bottom surface (14a) of the core (14) and the bottom surface (16a) of the bobbin is a predetermined dimension, and the bobbin (16) is provided so that the bobbin bottom surface (16a) is placed on the upper surface (100a) of the external substrate (100), and therefore the coil (10) and core (14) are positioned via the bobbin (16) to separate the gap (18) from the coil (10) and the upper surface (100a) of the external substrate (100) by a predetermined distance, and the effect of eddy current loss due to leakage flux generated from the gap (18) can be reduced.

[0016] The coil positioning portion (22) is formed as a recess (22a) into which a portion of the coil (10) is inserted at the central portion (16b') of the upper end (16b) of the bobbin (16), and the lower end (10a) of the coil (10) is formed as a terminal portion (10a') for insertion into a through hole (110) of the external board (100). By inserting a portion of the coil (10) into the recess (22a) and positioning it at the central portion (16b') of the upper end (16b) of the bobbin (16), and exposing the terminal portion (10a') downward from the bottom surface (16a) of the bobbin, and inserting it into the through hole (110) of the external board (100), the coil (10) can be provided on the external board (100) while being positioned at the central portion (16b') of the upper end (16b) of the bobbin (16).

[0017] The coil (10) is formed in a flat U-shape with a predetermined width dimension, and both lower ends (10a) of the U-shape are inserted into through holes (110) of the external board (100) as terminal portions (10a'), and the U-shaped middle portion (10b) is positioned to fit into the coil positioning portion (22) of the bobbin (16). This allows the coil (10) to be positioned via the bobbin (16) while being provided on the external board (100).

[0018] The core (14) has a first core portion (141) and a second core portion (142). The first core portion (141) and the second core portion (142) are formed in an E-shape when viewed from above, and include base portions (141a, 142a), first side portions (141b, 142b) extending from one end of the base portions (141a, 142a), and second side portions (141b, 142b) extending from the other end of the base portions (141a, 142a). and an intermediate portion (141d, 142d) extending from the middle of the base portion (141a, 142a) so as to be parallel to the first side portion (141b, 142b) and the second side portion (141c, 142c), and at least one of the intermediate portions (141d, 142d) of the first core portion (141) and the second core portion (142) is The first core portion (141) and the second core portion (142) are opposed to each other, an end portion (141b') of the first side portion (141b) of the first core portion (141) is butted against an end portion (142b') of the first side portion (142b) of the second core portion (142), and the second side portion (141c, 142c) of the first core portion (141) is set to be shorter than the end portion (141b') of the first side portion (141b) of the first core portion (141) and / or the end portion (142b') of the second core portion (142). When the end (141c') of the first core portion (141) is butted against the end (142c') of the second side portion (142c) of the second core portion (142), a gap (18) can be formed in the center of the core (14).

[0019] The bobbin (16) has a plate-like first side portion (161), a second side portion (162), a bottom portion (163), a middle portion (164), a first support portion (165), and a second support portion (166). The first side portion (161) and the second side portion (162) are arranged to stand on an upper surface (163a) of the bottom portion (163) and to be parallel to each other. The middle portion (164) has a first middle portion side portion (164a), a second middle portion side portion (164b), and a middle portion upper portion (164c). The first middle portion side portion (164a) and the second middle portion side portion (164b) are arranged on the first side portion (161). and the second side portion (162), the intermediate portion upper portion (164c) is provided so as to be parallel to the first side portion (161) and the second side portion (162) with a predetermined gap (161', 162') therebetween, to be erected on the upper surface (163a) of the bottom portion (163) and to be parallel to each other, the first support portion (165) and the second support portion (166) are provided so as to connect the upper end (164a') of the first intermediate portion side portion (164a) and the upper end (164b') of the second intermediate portion side portion (164b) and to be parallel to the bottom portion (163), The coil positioning portions (22) are provided on the upper ends (165', 166') of the first support portion (165) and the second support portion (166) so as to stand upright on the upper end (165', 164c) of the first support portion (165) and the second support portion (166) and are parallel to each other and further to the first side portion (161) and the second side portion (162). The coil positioning portions (22) are formed as recesses (22a) on the upper surface (163a) side of the bottom portion (163). The first support portion (165) and the second support portion (166) are provided with a first bottom connecting portion (163') that connects the lower side of the first side portion (161) and the lower side of the first intermediate side portion (164a), and a second bottom connecting portion (163') that connects the lower side of the second side portion (162) and the lower side of the second intermediate side portion (164b), on the upper surface (163a) side. and a second bottom connecting portion (163'') connecting the first and second bottom connecting portions (163'') and a first bottom hole (163b) and a second bottom hole (163c) are provided in the first bottom connecting portion (163'') and the second bottom connecting portion (163'') so as to communicate with the gaps (161', 162'). Furthermore, the bottom (163) has a protruding portion (163d) that protrudes outward from the first side portion (161) and the second side portion (162), and has a leg portion (163f) extending downward from the lower surface (163e) of the bottom (163), and the lowest surface of the leg portion (163f) can be the lowest surface (16a) of the bobbin.

[0020] That is, the middle portion (141d) of the first core portion (141) and the middle portion (142d) of the second core portion (142) are inserted into the space (167) inside the middle portion (164) of the bobbin (16), so that the end portion (141b') of the first side portion (141b) of the first core portion (141) is butted against the end portion (142b') of the first side portion (142b) of the second core portion (142), and the end portion (141c') of the second side portion (141c) of the first core portion (141) is butted against the end portion (142c') of the second side portion (142c) of the second core portion (142), so that the first side portion (161) and the first middle portion side of the bobbin (16) are interposed between the middle portions (141d, 142d) and the first side portions (141b, 142b). The core (14) can be positioned via the bobbin (16) by assembling the core (14) to the bobbin (16) so that the end (141d') of the intermediate portion (141) of the first core portion (141) and the end (142d') of the intermediate portion (142d) of the second core portion (142) are spaced apart to form a gap (18) in the center of the core (14), and so that the bottom surface (14a) of the core (14) is placed on the protruding portion (163d) of the bottom portion (163).

[0021] The U-shaped middle portion (10b) of the coil (10) is fitted into the coil positioning portion (22) of the bobbin (16) to position it, while the terminal portion (10a') of the coil (10) is inserted into the first bottom hole (163b) of the bobbin (16) and into the second bottom hole (163c) of the bobbin (16), and further inserted into the through hole (110) of the external board (100) so that the terminal portion (10a') of the coil (10) is exposed downward from the bottom surface (16a) of the bobbin, and the coil (10) is assembled to the bobbin (16), whereby the coil (10) can be positioned via the bobbin (16) and provided on the external board (100). Effect of the Invention

[0022] According to the present invention, the coil 10 and the core 14 can be positioned via the bobbin 16 to separate the gap 18 from the coil 10 and the upper surface 100a of the external substrate 100 by a predetermined distance, thereby reducing the effect of eddy current loss due to leakage magnetic flux generated from the gap 18. [Brief description of the drawings]

[0023] [Figure 1] FIG. 1 is an exploded perspective view showing a configuration of a magnetic component according to an embodiment of the present invention. [Diagram 2] 1A and 1B are diagrams showing the configuration of the magnetic part, in which (a) is a plan view and (b) is a front view. [Diagram 3] 1A and 1B are diagrams showing the core configuration in the magnetic component, where (a) is a plan view showing the state in which the first core portion and the second core portion are separated, and (b) is a plan view showing the state in which the ends of the first core portion and the second core portion are butted together to form a gap. [Figure 4] 2A and 2B are diagrams showing the configuration of a bobbin in the magnetic component, in which (a) is a plan view and (b) is a front view. [Diagram 5] FIG. 4 is a side view of the bobbin in the magnetic component. [Figure 6] 4 is a front view for explaining a method of assembling the magnetic component. FIG. [Figure 7] 7 is a plan view following FIG. 6 for explaining the method of assembling the magnetic component. FIG. [Figure 8] 8 is a plan view following FIG. 7 for explaining the method of assembling the magnetic component. FIG. [Figure 9] 9 is a front view following FIG. 8 for explaining the method of assembling the magnetic component. FIG. [Figure 10] 10 is a plan view continuing from FIG. 9 for explaining the method of assembling the magnetic component. FIG. [Figure 11] 9 is a front view following FIG. 8 for explaining the method of assembling the magnetic component. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] An example of an embodiment will be described below. Note that the present invention is not limited to the embodiment described below, and appropriate modifications can be made without departing from the spirit and scope of the invention.

[0025] An embodiment of the present invention will be described in detail with reference to the drawings. Fig. 1 is an exploded perspective view showing the configuration of a magnetic component according to an embodiment of the present invention, Fig. 2 is a diagram showing the configuration of the magnetic component, Fig. 3 is a diagram showing the configuration of a core in the magnetic component, Figs. 4 and 5 are diagrams showing the configuration of a bobbin in the magnetic component, Fig. 6 is a front view for explaining a method of assembling the magnetic component, Fig. 7 is a plan view following Fig. 6 for explaining the method of assembling the magnetic component, Fig. 8 is a plan view following Fig. 7 for explaining the method of assembling the magnetic component, Fig. 9 is a plan view following Fig. 8 for explaining the method of assembling the magnetic component, Fig. 10 is a front view following Fig. 9 for explaining the method of assembling the magnetic component, and Fig. 11 is a front view following Fig. 8 for explaining the method of assembling the magnetic component.

[0026] As shown in Figures 1 to 5, a magnetic component 1 according to an embodiment of the present invention comprises a coil 10, a core 14, and a bobbin 16, wherein the coil 10 is formed of a conductive material with one or less turns, the core 14 has a gap 18 in which no magnetic path is formed, and the bobbin 16 has a coil positioning portion 22 that positions the coil 10 so that the distance between the gap 18 and the coil 10 is a predetermined dimension, and a core positioning portion 16c that positions the core 14 so that the distance between the bottom surface 14a of the core 14 and the bottom surface 16a of the bobbin 16 is a predetermined dimension, the bobbin bottom surface 16a is located below the core bottom surface 14a, and the bobbin 16 is provided so that the bobbin bottom surface 16a is placed on the upper surface 100a of the external substrate 100.

[0027] The coil positioning portion 22 is formed as a recess 22a into which a part of the coil 10 is inserted at a central portion 16b' of the upper end 16b of the bobbin 16, and the lower end portion 10a of the coil 10 is formed as a terminal portion 10a' for insertion into a through hole 110 of the external substrate 100. A part of the coil 10 is inserted into the recess 22a to position the coil 10 at the central portion 16b' of the upper end 16b of the bobbin 16, and the terminal portion 10a' is exposed downward from the lowermost surface 16a of the bobbin and inserted into the through hole 110 of the external substrate 100, thereby positioning the coil 10, the gap 18, and the external substrate 100. The terminal portion 10a' is connected and fixed to the through hole 110 of the external substrate 100 by soldering or the like. The through hole 110 is a through hole provided in the external substrate 100.

[0028] When the magnetic component 1 is viewed from above, the gap 18 and the coil 10 are disposed in an overlapping position.

[0029] The coil 10 is formed in a flat U-shape with a predetermined width dimension, and both lower ends 10a of the U-shape are inserted into through holes 110 of the external substrate 100 as terminal portions 10a', and the U-shaped middle portion 10b is positioned so as to be fitted into the coil positioning portion 22 of the bobbin 16.

[0030] The coil 10 is made of copper. The core 14 has a first core portion 141 and a second core portion 142. The first core portion 141 and the second core portion 142 are formed in an E-shape when viewed from above, and have base portions 141a, 142a, first side portions 141b, 142b extending from one end of the base portions 141a, 142a, second side portions 141c, 142c extending from the other end of the base portions 141a, 142a, and intermediate portions 141d, 142d extending from the middle of the base portions 141a, 142a so as to be parallel to the first side portions 141b, 142b and the second side portions 141c, 142c. Of the intermediate portions 141d, 142d in the first core portion 141 and the second core portion 142, At least one of them is set to be shorter than the first side portions 141b, 142b and / or the second side portions 141c, 142c, and when the first core portion 141 and the second core portion 142 are opposed to each other and an end portion 141b' of the first side portion 141b of the first core portion 141 is butted against an end portion 142b' of the first side portion 142b of the second core portion 142, and an end portion 141c' of the second side portion 141c of the first core portion 141 is butted against an end portion 142c' of the second side portion 142c of the second core portion 142, a gap is formed between an end portion 141d' of the intermediate portion 141d of the first core portion 141 and an end portion 142d' of the intermediate portion 142d of the second core portion 142. This separated portion becomes a gap 18.

[0031] The bobbin 16 has a plate-like first side portion 161, a second side portion 162, a bottom portion 163, a middle portion 164, a first support portion 165, and a second support portion 166. The first side portion 161 and the second side portion 162 are provided so as to stand on an upper surface 163a of the bottom portion 163 and to be parallel to each other. The middle portion 164 has a first middle portion side portion 164a, a second middle portion side portion 164b, and a middle portion upper portion 164c. The first middle portion side portion 164a and the second middle portion side portion 164b are disposed adjacent to the first side portion 161. The first support portion 165 and the second support portion 166 are disposed in parallel with the first side portion 161 and the second side portion 162 with a predetermined gap 161′, 162′ therebetween, and are arranged to stand on the upper surface 163a of the bottom portion 163 and to be parallel to each other, between the first side portion 161 and the second side portion 162, and are arranged to connect the upper end 164a′ of the first intermediate portion side portion 164a and the upper end 164b′ of the second intermediate portion side portion 164b, and are arranged in parallel with the bottom portion 163. The coil positioning portions 22 are provided on the upper end 165', 166' of the first support portion 165 and the second support portion 166 so as to stand on the upper portion 164c and to be parallel to each other and further to be parallel to the first side portion 161 and the second side portion 162, and are formed as recesses 22a. The bottom portion 163 is provided on the upper surface 163a side with a first bottom connecting portion 163' that connects the lower side of the first side portion 161 and the lower side of the first intermediate side portion 164a, and a second bottom connecting portion 163' that connects the lower side of the second side portion 162 and the lower side of the second intermediate side portion 164a. and a second bottom connecting portion 163" connecting the lower side of the gap 161' to the lower side of the gap 162', and a first bottom hole 163b and a second bottom hole 163c are provided in the first bottom connecting portion 163' and the second bottom connecting portion 163" so as to communicate with the gaps 161', 162', and further, the bottom 163 has a protruding portion 163d protruding outward from the first side portion 161 and the second side portion 162, and a leg portion 163f extending downward from the lower surface 163e of the bottom 163, the lowermost surface of the leg portion 163f being the bobbin lowermost surface 16a. The upper surface 163a of the bottom 163 of the bobbin 16 functions as a core positioning portion 16c that positions the core 14.

[0032] The magnetic component 1 configured as above can be assembled as shown in FIGS.

[0033] That is, as shown in FIG. 6, the bobbin 16 is provided so that the bobbin bottom surface 16a is placed on the upper surface 100a of the external substrate 100.

[0034] Next, as shown in FIGS. 7 to 9, the intermediate portion 141d of the first core portion 141 and the intermediate portion 142d of the second core portion 142 are inserted into the space 167 inside the intermediate portion 164 of the bobbin 16 so as to face each other, and an end portion 141b' of the first side portion 141b of the first core portion 141 is butted against an end portion 142b' of the first side portion 142b of the second core portion 142, and an end portion 141c' of the second side portion 141c of the first core portion 141 is butted against an end portion 142c' of the second side portion 142c of the second core portion 142, so that bobbins are formed between the intermediate portions 141d, 142d and the first side portions 141b, 142b. The core 14 is assembled to the bobbin 16 so that the first side portion 161 and the first intermediate side portion 164a of the bobbin 16 are sandwiched, and the second side portion 162 and the second intermediate side portion 164b of the bobbin 16 are sandwiched between the intermediate portions 141d, 142d and the second side portions 141c, 142c, and further so that a gap 18 is formed in the center of the core 14 by separating the end portion 141d' of the intermediate portion 141d of the first core portion 141 from the end portion 142d' of the intermediate portion 142d of the second core portion 142, and further so that the bottom surface 14a of the core 14 is placed on the protruding portion 163d of the bottom portion 163.

[0035] 10 and 11, while fitting and positioning the U-shaped middle portion 10b of the coil 10 into the coil positioning portion 22 of the bobbin 16, one terminal portion 10a' of the coil 10 is inserted into the first bottom hole 163b through the gap 161' of the bobbin 16, and the other terminal portion 10a' of the coil 10 is inserted into the second bottom hole 163c through the gap 162' of the bobbin 16, and further inserted into the through hole 110 of the external substrate 100 so that the terminal portion 10a' of the coil 10 is exposed downward from the bottom surface 16a of the bobbin, thereby assembling the coil 10 to the bobbin 16. The terminal portion 10a' of the coil 10 is connected and fixed to the through hole 110 of the external substrate 100 by soldering or the like.

[0036] According to this embodiment, the bobbin 16 has a coil positioning portion 22 that positions the coil 10 so that the distance between the gap 18 and the coil 10 is a predetermined dimension, and a core positioning portion 16c that positions the core 14 so that the distance between the bottom surface 14a of the core 14 and the bottom surface 16a of the bobbin is a predetermined dimension, and the bobbin bottom surface 16a is located lower than the core bottom surface 14a, and the bobbin 16 is provided so that the bobbin bottom surface 16a is placed on the upper surface 100a of the external substrate 100.By positioning the coil 10 and the core 14 via the bobbin 16, the gap 18 can be separated from the coil 10 and the upper surface 100a of the external substrate 100 by a predetermined distance, and the effect of eddy current loss due to leakage flux generated from the gap 18 can be reduced.

[0037] Furthermore, according to this embodiment, the coil positioning portion 22 is formed as a recess 22a into which a portion of the coil 10 is inserted at the central portion 16b' of the upper end 16b of the bobbin 16, and the lower end 10a of the coil 10 is formed as a terminal portion 10a' for insertion into a through hole 110 of the external board 100. A portion of the coil 10 is inserted into the recess 22a and positioned at the central portion 16b' of the upper end 16b of the bobbin 16, and the terminal portion 10a' is exposed downward from the bottom surface 16a of the bobbin and inserted into the through hole 110 of the external board 100, so that the coil 10 can be provided on the external board 100 while being positioned at the central portion 16b' of the upper end 16b of the bobbin 16.

[0038] Furthermore, according to this embodiment, the coil 10 is formed in a flat U-shape with a predetermined width dimension, and both lower ends 10a of the U-shape are inserted into the through-holes 110 of the external substrate 100 as terminal portions 10a', and the U-shaped middle portion 10b is positioned to be fitted into the coil positioning portion 22 of the bobbin 16, thereby allowing the coil 10 to be positioned via the bobbin 16 while being provided on the external substrate 100.

[0039] Furthermore, according to this embodiment, the core 14 has a first core portion 141 and a second core portion 142. The first core portion 141 and the second core portion 141 are formed in an E-shape when viewed from above, and have base portions 141a, 142a, first side portions 141b, 142b extending from one end of the base portions 141a, 142a, second side portions 141c, 142c extending from the other end of the base portions 141a, 142a, and intermediate portions 141d, 142d extending from the middle of the base portions 141a, 142a so as to be parallel to the first side portions 141b, 142b and the second side portions 141c, 142c. At least one of the intermediate portions 141d, 142d in the first core portion 141 and the second core portion 142 One side is set to be shorter in length than the first side portions 141b, 142b and / or the second side portions 141c, 142c, and when the first core portion 141 and the second core portion 142 are opposed to each other and the end portion 141b' of the first side portion 141b of the first core portion 141 is butted against the end portion 142b of the first side portion 142b of the second core portion 142, and the end portion 141c' of the second side portion 141c of the first core portion 141 is butted against the end portion 142c' of the second side portion 142c of the second core portion 142, a gap 18 can be formed in the center of the core 14 by separating the end portion 141d' of the intermediate portion 141d of the first core portion 141 from the end portion 142d' of the intermediate portion 142d of the second core portion 142.

[0040] Furthermore, according to this embodiment, the intermediate portion 141d of the first core portion 141 and the intermediate portion 142d of the second core portion 142 are inserted into the space 167 inside the intermediate portion 164 of the bobbin 16 so as to face each other, and the end portion 141b' of the first side portion 141b of the first core portion 141 is butted against the end portion 142b' of the first side portion 142b of the second core portion 142, and the end portion 141c' of the second side portion 141c of the first core portion 141 is butted against the end portion 142c' of the second side portion 142c of the second core portion 142, so that the first side portion 161 and the first side portion 142b of the bobbin 16 are interposed between the intermediate portions 141d, 142d and the first side portions 141b, 142b. The core 14 can be positioned via the bobbin 16 by assembling the core 14 to the bobbin 16 so that the intermediate portion side portion 164a is sandwiched, and so that the second side portion 162 and the second intermediate portion side portion 164b of the bobbin 16 are sandwiched between the intermediate portions 141d, 142d and the second side portions 141c, 142c, and further so that the end portion 141d' of the intermediate portion 141d of the first core portion 141 is spaced from the end portion 142d' of the intermediate portion 142d of the second core portion 142 to form a gap 18 in the center of the core 14, and further so that the bottom surface 14a of the core 14 is placed on the protruding portion 163d of the bottom portion 163.

[0041] Furthermore, according to this embodiment, the U-shaped intermediate portion 10b of the coil 10 is fitted into the coil positioning portion 22 of the bobbin 16 to position it, while the terminal portion 10a' of the coil 10 is inserted into the first bottom hole 163b of the bobbin 16 and into the second bottom hole 163c of the bobbin 16, and further inserted into the through hole 110 of the external board 100 so that the terminal portion 10a' of the coil 10 is exposed downward from the bottom surface 16a of the bobbin, and the coil 10 is assembled to the bobbin 16, whereby the coil 10 can be positioned via the bobbin 16 and provided on the external board 100. [Explanation of symbols]

[0042] 1: Magnetic parts 10: Coil 10a: Bottom end 10a´:Terminal part 10´:Main body 12:Through hole 14: Core 14a: Bottom surface 141: First Core 141a: Base 141b: First side 141b´:End 141c: Second side 141c´:End 141d: Middle part 141d´:End 142: Second Core 142a: Base 142b: First side 142b´:End 142c: Second side 142c´:End 142d: Middle part 142d´:End 16: Bobbin 16a: Bottom surface 16b:Top edge 16b´:Central part 161: First side 161´:Gap 162: Second side 162´:Gap 163: Bottom 163a:Top surface 163b: 1st bottom hole 163c: 2nd bottom hole 163d: protruding part 163e: Bottom surface 163f: Legs 163´: 1st bottom connection part 163´´:Second bottom connection part 164: Middle section 164a: First intermediate side 164a´´:Top surface 164a´:Top edge 164b: Second intermediate side 164b´:Top edge 164c: Upper middle part 165: 1st support part 165´:Top end 166:Second support part 166´:Top end 167: Space 18: Gap 22: Coil positioning section 22a: Recess 16c: Core positioning part 100: External board 100a:Top surface 110:Through hole

Claims

1. The coil (10), the core (14), and the bobbin (16), The coil (10) is made of a conductive material with one or less turns, The core (14) has a gap (18) in a portion where no magnetic path is formed, the bobbin (16) has a coil positioning portion (22) that positions the coil (10) so that a distance between the gap (18) and the coil (10) is a predetermined dimension, and a core positioning portion (16c) that positions the core (14) so ​​that a distance between a lowermost surface (14a) of the core (14) and a lowermost surface (16a) of the bobbin (16) is a predetermined dimension; The bobbin (16) is provided such that the bottom surface (16a) of the bobbin is located below the bottom surface (14a) of the core, and the bottom surface (16a) of the bobbin is placed on the upper surface (100a) of an external substrate (100); A magnetic component (1).

2. The coil positioning portion (22) is formed as a recess (22a) into which a part of the coil (10) is inserted at a central portion (16b') of an upper end (16b) of the bobbin (16), A lower end portion (10a) of the coil (10) is formed as a terminal portion (10a') to be inserted into a through hole (110) of the external substrate (100), a portion of the coil (10) is inserted into the recess (22a) and positioned at the center (16b') of the upper end (16b) of the bobbin (16), and the terminal portion (10a') is exposed downward from the bottom surface (16a) of the bobbin and inserted into a through hole (110) of the external substrate (100), thereby positioning the coil (10), the gap (18), and the external substrate (100); 2. A magnetic component (1) according to claim 1, characterized in that

3. 3. The magnetic component (1) according to claim 1 or 2, characterized in that, when viewed from above, the gap (18) and the coil (10) are arranged in an overlapping position.

4. The magnetic component (1) described in claim 1, characterized in that the coil (10) is formed in a flat U-shape with a predetermined width dimension, both lower ends (10a) of the U-shape are inserted into a through hole (110) of the external substrate (100) as the terminal portion (10a'), and the U-shaped middle portion (10b) is positioned to be fitted into the coil positioning portion (22) of the bobbin (16).

5. 2. The magnetic component (1) according to claim 1, characterized in that the coil (10) is made of copper.

6. The core (14) has a first core portion (141) and a second core portion (142), The first core portion (141) and the second core portion (142) are formed in an E-shape when viewed from above, and include a base portion (141a, 142a), a first side portion (141b, 142b) extending from one end of the base portion (141a, 142a), a second side portion (141c, 142c) extending from the other end of the base portion (141a, 142a), and a second side portion (141b, 142b) extending from the other end of the base portion (141a, 142a). and an intermediate portion (141d, 142d) extending from the middle of the base portion (141a, 142a) so as to be parallel to the first side portion (141b, 142b) and the second side portion (141c, 142c), and at least one of the intermediate portions (141d, 142d) in the first core portion (141) and the second core portion (142) is The magnetic component (1) according to claim 1, characterized in that when the first core portion (141) and the second core portion (142) are opposed to each other and an end (141b') of the first side portion (141b) of the first core portion (141) is butted against an end (142b') of the first side portion (142b) of the second core portion (142), and an end (141c') of the second side portion (141c) of the first core portion (141) is butted against an end (142c') of the second side portion (142c) of the second core portion (142), there is a separation between the end (141d') of the intermediate portion (141d) of the first core portion (141) and the end (142d') of the intermediate portion (142d) of the second core portion (142).

7. The bobbin (16) has a plate-shaped first side portion (161), a second side portion (162), a bottom portion (163), a middle portion (164), a first support portion (165), and a second support portion (166), The first side portion (161) and the second side portion (162) are provided so as to stand on the upper surface (163a) of the bottom portion (163) and to be parallel to each other, The intermediate portion (164) has a first intermediate side portion (164a), a second intermediate side portion (164b), and an intermediate top portion (164c); the first intermediate side portion (164a) and the second intermediate side portion (164b) are provided between the first side portion (161) and the second side portion (162) so as to be parallel to the first side portion (161) and the second side portion (162) with a predetermined gap (161', 162') therebetween, and so as to stand on the upper surface (163a) of the bottom portion (163) and to be parallel to each other; The intermediate upper portion (164c) is provided so as to connect the upper end (164a') of the first intermediate side portion (164a) and the upper end (164b') of the second intermediate side portion (164b) and to be parallel to the bottom portion (163); the first support portion (165) and the second support portion (166) are provided so as to stand on the upper portion (164c) of the intermediate portion and to be parallel to each other and further to be parallel to the first side portion (161) and the second side portion (162), and the coil positioning portion (22) formed as the recess (22a) is provided at upper ends (165', 166') of the first support portion (165) and the second support portion (166), The bottom portion (163) has, on its upper surface (163a) side, a first bottom connecting portion (163') that connects the lower side of the first side portion (161) to the lower side of the first intermediate portion side portion (164a), and a second bottom connecting portion (163'') that connects the lower side of the second side portion (162) to the lower side of the second intermediate portion side portion (164b), and a first bottom hole (163b) and a second bottom hole (163c) are provided in the first bottom connecting portion (163') and the second bottom connecting portion (163'') so as to communicate with the gap (161', 162'); The magnetic component (1) of claim 1, further characterized in that the bottom (163) has a protruding portion (163d) that protrudes outward from the first side (161) and the second side (162), and has a leg portion (163f) that extends downward from a lower surface (163e) of the bottom (163), and the lowest surface of the leg portion (163f) is the lowest surface (16a) of the bobbin.

8. The intermediate portion (141d) of the first core portion (141) and the intermediate portion (142d) of the second core portion (142) are inserted into the space (167) inside the intermediate portion (164) of the bobbin (16) so as to face each other, and an end portion (141b') of the first side portion (141b) of the first core portion (141) and an end portion (142b') of the first side portion (142b) of the second core portion (142) are inserted into the space (167) inside the intermediate portion (164) of the bobbin (16). and an end (141c') of the second side portion (141c) of the first core portion (141) and an end (142c') of the second side portion (142c) of the second core portion (142) are butted against each other, and the first side portion (161) and the The magnetic component (1) of claim 1, characterized in that the core (14) is assembled to the bobbin (16) so as to sandwich a first intermediate portion side portion (164a) and to sandwich the second side portion (162) and the second intermediate portion side portion (164b) of the bobbin (16) between the intermediate portion (141d, 142d) and the second side portion (141c, 142c), and further so as to form the gap (18) in the center of the core (14) by separating the end portion (141d') of the intermediate portion (141d) of the first core portion (141) from the end portion (142d') of the intermediate portion (142d) of the second core portion (142), and further so that the bottom surface (14a) of the core (14) is placed on the protruding portion (163d) of the bottom portion (163).

9. The magnetic component (1) according to claim 1, characterized in that while the U-shaped intermediate portion (10b) of the coil (10) is fitted into the coil positioning portion (22) of the bobbin (16) to position it, one of the terminal portions (10a') of the coil (10) is inserted into the first bottom hole (163b) through the gap (161') of the bobbin (16), and the other terminal portion (10a') of the coil (10) is inserted into the second bottom hole (163c) through the gap (162') of the bobbin (16), and further, the terminal portion (10a') of the coil (10) is inserted into a through hole (110) of the external substrate (100) so that it is exposed downward from the bottom surface (16a) of the bobbin, thereby assembling the coil (10) to the bobbin (16).

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