Inductors

Abstract

To provide an inductor capable of further improving an electromagnetic characteristic while reducing a height of the inductor itself.SOLUTION: An inductor 100 comprises a core 200 and a coil 400. The core 200 has a first edge 220 and a second edge 250. The coil 400 has a first terminal 410, a second terminal 490, a first portion 430, a second portion 470, a third portion 450, a first coupling part 420, a second coupling part 480, a first extended part 440, and a second extended part 460. Each of the first portion 430 and the second portion 470 is located so as to be separated from the first edge 220 and parallel to the first edge 220 and separated from the third portion 450 in a first horizontal direction. In a second horizontal direction, each size of the first portion 430 and the second portion 470 is smaller than that of the third portion 450. The third portion 450 is separated from the second edge 250 and parallel to the second edge 250.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an inductor including a core and a coil. [Background technology]

[0002] An inductor of this type is disclosed in Patent Document 1. In detail, Patent Document 1 discloses a coil wound so that the winding axis is in the Z direction, as shown in FIG. 894 Core 896 Inductor buried in 892 13, an inductor 900 in which a meandering coil 910 extending in a plane perpendicular to the Z direction is embedded in a core 920. Here, the inductor 900 in FIG. 13 is the same as the inductor in FIG. 892 In comparison, the height of the inductor itself has been made lower. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2004-197218 A Summary of the Invention [Problem to be solved by the invention]

[0004] SUMMARY OF THE PRESENT EMBODIMENTS Accordingly, an object of the present invention is to provide an inductor which has improved electromagnetic characteristics while achieving a reduction in the height of the inductor itself. [Means for solving the problem]

[0005] The present invention provides a first inductor, An inductor comprising a core and a coil, The core has a first edge and a second edge; the first edge and the second edge are spaced apart from each other in a first horizontal direction; the coil has a first terminal, a second terminal, a first portion, a second portion, a third portion, a first connecting portion, a second connecting portion, a first extending portion, and a second extending portion; the first terminal and the second terminal are spaced apart from each other in a second horizontal direction perpendicular to the first horizontal direction, Each of the first portion and the second portion is spaced apart from and parallel to the first edge and is spaced apart from the third portion in the first horizontal direction; In the second horizontal direction, a size of each of the first region and the second region is smaller than a size of the third region; the third portion is spaced apart from and parallel to the second edge, the first connecting portion connects the first terminal and the first portion, the second connecting portion connects the second terminal and the second portion, the first extension portion connects the first portion and the third portion, The second extension portion connects the second portion and the third portion, The first portion, the second portion, the third portion, the first connecting portion, the second connecting portion, the first extending portion, and the second extending portion are embedded in the core. An inductor is provided.

[0006] In addition, the present invention provides a first inductor as the second inductor, The first section has a first outer end and a first inner end. the first connecting portion connects the first outer end portion and the first terminal, The second section has a second outer end and a second inner end. the second connecting portion connects the second outer end portion and the second terminal, the third portion has a first end and a second end; In the second horizontal direction, the first inner end portion is located more inward than the first end portion, The first extension portion connects the first inner end portion and the first end portion, In the second horizontal direction, the second inner end portion is located more inward than the second end portion, The second extension portion connects the second inner end portion and the second end portion. An inductor is provided.

[0007] Furthermore, the present invention provides a third inductor, which is a second inductor, the first extension portion extends along a first straight line connecting the first inner end portion and the first end portion, or extends so as to bulge outward from the first straight line, The second extension portion extends along a second straight line connecting the second inner end portion and the second end portion, or extends so as to bulge outward from the second straight line. An inductor is provided.

[0008] Furthermore, the present invention provides a fourth inductor, which is any one of the first to third inductors, Each of the first extension portion and the second extension portion extends at least partially in a direction intersecting the first horizontal direction. An inductor is provided.

[0009] Furthermore, the present invention provides a fifth inductor, which is any one of the first to fourth inductors, The first edge and the second edge extend parallel to each other. An inductor is provided. Effect of the Invention

[0010] In the inductor of the present invention, the first and second portions of the coil are located away from and parallel to the first edge of the core, and away from the third portion of the coil in the first horizontal direction. The third portion of the coil is located away from and parallel to the second edge of the core. This allows the inductor to have a low profile while further improving its electromagnetic characteristics.

[0011] In the inductor of the present invention, the first extension connects the first portion and the third portion, the second extension connects the second portion and the third portion, and the size of each of the first portion and the second portion in the second horizontal direction is smaller than the size of the third portion in the second horizontal direction. As a result, in the inductor of the present invention, a large area surrounded by the third portion, the first extension, and the second extension can be secured within the core, so that the core can be effectively magnetized when the coil is energized. Therefore, the inductor of the present invention has improved electromagnetic characteristics. [Brief description of the drawings]

[0012] [Figure 1] 1 is a perspective view showing an inductor according to a first embodiment of the present invention, in which a portion hidden by a core is shown by a dotted line. [Diagram 2] Fig. 2 is a top view showing the inductor of Fig. 1. In the figure, the part hidden by the core is shown by a dotted line. [Diagram 3] Fig. 2 is a front view showing the inductor of Fig. 1. In the figure, the part hidden by the core is shown by a dotted line. [Figure 4] 2 is a side view showing the inductor of FIG 1. In the figure, the part hidden by the core is shown by a dotted line. [Diagram 5] 2 is a perspective view showing a coil included in the inductor of FIG. 1. [Figure 6] FIG. 6 is a top view showing the coil of FIG. 5. [Figure 7] 1 is a perspective view showing an inductor according to a second embodiment of the present invention, in which the parts hidden by the core are shown by dotted lines. [Figure 8] 8 is a top view showing the inductor of Fig. 7. In the figure, the part hidden by the core is shown by a dotted line. [Figure 9] 1 is a perspective view showing an inductor of a comparative example, in which a portion hidden by a core is indicated by a dotted line. [Figure 10] 10 is a top view showing the inductor of Fig. 9. In the figure, the part hidden by the core is shown by a dotted line. [Figure 11] 1 is a graph showing DC bias characteristics according to an example and a comparative example. [Figure 12] FIG. 1 is a perspective view showing the inductor of Patent Document 1. In the figure, the part hidden by the core is shown by a dotted line. [Figure 13] 1 is a perspective view showing another inductor disclosed in Patent Document 1. In the figure, the portion hidden by the core is indicated by dotted lines. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] (First embodiment) As shown in FIG. 1, an inductor 100 according to a first embodiment of the present invention includes a core 200 and a coil 400.

[0014] Referring to Fig. 2, the core 200 of the present embodiment is a dust core. More specifically, the core 200 is formed by compression molding soft magnetic powder and a binder. Here, the soft magnetic powder contained in the core 200 is made of an iron-based alloy or ferrite that has been subjected to an insulating treatment. However, the core 200 of the present invention is not limited thereto, and can be manufactured by any manufacturing method, for example, by bonding a plurality of magnetic bodies with an adhesive.

[0015] As shown in Fig. 2, the core 200 of this embodiment has a generally square columnar shape extending in the vertical direction. When viewed in the vertical direction, the core 200 has a rectangular shape with rounded corners. In this embodiment, the vertical direction is the Z direction. Here, the upper side is the +Z direction, and the lower side is the -Z direction. The core 200 has a first edge 220 and a second edge 250.

[0016] As shown in FIG. 2, the first edge 220 in this embodiment is one end of the core 200 in the first horizontal direction. In this embodiment, the first horizontal direction is the X direction. The first edge 220 constitutes one side of the rounded rectangle of the core 200. More specifically, the first edge 220 constitutes one side on the +X side of the rounded rectangle of the core 200. The first edge 220 is located on the +X side of the second edge 250 in the first horizontal direction. The first edge 220 extends along the second horizontal direction. In this embodiment, the second horizontal direction is the Y direction.

[0017] 2, the second edge 250 of the present embodiment is one remaining end of the core 200 in the first horizontal direction. The second edge 250 constitutes the other side of the rounded rectangle of the core 200. More specifically, the second edge 250 constitutes one side on the -X side of the rounded rectangle of the core 200. The second edge 250 extends along the second horizontal direction.

[0018] 2, the first edge 220 and the second edge 250 are spaced apart from each other in a first horizontal direction. The first edge 220 and the second edge 250 extend parallel to each other. More specifically, the first edge 220 and the second edge 250 extend parallel to each other along the second horizontal direction.

[0019] 6, coil 400 of the present embodiment is a single-turn coil made of copper. Coil 400 has a first terminal 410, a first connecting portion 420, a first portion 430, a first extending portion 440, a third portion 450, a second extending portion 460, a second portion 470, a second connecting portion 480, and a second terminal 490.

[0020] 2, first terminal 410 of the present embodiment is exposed to the outside of core 200. First terminal 410 is provided on one side of core 200 on the +Y side of the rectangle with rounded corners.

[0021] 5, the first connecting portion 420 of the present embodiment is perpendicular to the up-down direction. The first connecting portion 420 has a flat plate shape extending in the first horizontal direction. The first connecting portion 420 connects the first terminal 410 and the first portion 430.

[0022] As can be seen from FIG. 3, the first portion 430 of this embodiment is perpendicular to the up-down direction. As shown in FIG. 6, the first portion 430 has a flat plate shape extending in the second horizontal direction. The first portion 430 is located on the +Y side of the second portion 470 in the second horizontal direction. As shown in FIG. 2, the first portion 430 is separated from the first edge 220 and parallel to the first edge 220. More specifically, the first portion 430 is separated from the first edge 220 and parallel to the first edge 220 over the entire length. The first portion 430 is located separated from the third portion 450 in the first horizontal direction. The first portion 430 has a first outer end 432 and a first inner end 436.

[0023] 6, the first outer end 432 in this embodiment is the outer end of the first portion 430 in the second horizontal direction. That is, the first outer end 432 is the +Y end of the first portion 430 in the second horizontal direction. The first outer end 432 is connected to the first terminal 410 by the first connecting portion 420. That is, the first connecting portion 420 connects the first outer end 432 and the first terminal 410.

[0024] 6, the first inner end 436 in this embodiment is the inner end of the first portion 430 in the second horizontal direction. That is, the first inner end 436 is the -Y end of the first portion 430 in the second horizontal direction.

[0025] As shown in Fig. 5, the first extension portion 440 of this embodiment is perpendicular to the up-down direction. The first extension portion 440 has a flat plate shape extending in a direction intersecting both the first horizontal direction and the second horizontal direction. Note that the present invention is not limited thereto, and the first extension portion 440 may extend at least partially in a direction intersecting the first horizontal direction. The first extension portion 440 connects the first part 430 and the third part 450.

[0026] As shown in FIG. 5, the third portion 450 of the present embodiment is perpendicular to the up-down direction. The third portion 450 has a flat plate shape extending in the second horizontal direction. As shown in FIG. 2, the third portion 450 is separated from the second edge 250 and parallel to the second edge 250. More specifically, the third portion 450 is separated from the second edge 250 and parallel to the second edge 250 over the entire length. As shown in FIG. 6, in the second horizontal direction, the size S3 of the third portion 450 is larger than the size S1 of the first portion 430. That is, in the second horizontal direction, the size S1 of the first portion 430 is smaller than the size S3 of the third portion 450. The third portion 450 has a first end 452 and a second end 456.

[0027] As shown in FIG. 6, the first end 452 in this embodiment is one outer end of the third region 450 in the second horizontal direction. That is, the first end 452 is the +Y end of the third region 450. The first end 452 is connected to the first inner end 436 by the first extension portion 440. That is, the first extension portion 440 connects the first inner end 436 and the first end 452. In the second horizontal direction, the first end 452 is located outside the first inner end 436. That is, the first inner end 436 is located inside the first end 452 in the second horizontal direction.

[0028] 6, the first extension portion 440 of the present embodiment extends along a first straight line L1 connecting the first inner end portion 436 and the first end portion 452. Note that the present invention is not limited to this, and the first extension portion 440 may extend along the first straight line L1 connecting the first inner end portion 436 and the first end portion 452, or may extend so as to bulge outward from the first straight line L1.

[0029] 5, the second end 456 in this embodiment is one of the remaining outer ends of the third portion 450 in the second horizontal direction.

[0030] As shown in FIG. 5, the second extension portion 460 of the present embodiment is perpendicular to the up-down direction. The second extension portion 460 extends in a direction intersecting both the first horizontal direction and the second horizontal direction. Note that the present invention is not limited thereto, and the second extension portion 460 may extend at least partially in a direction intersecting the first horizontal direction. As shown in FIG. 6, the second extension portion 460 is not parallel to the first extension portion 440. The second extension portion 460 extends in a direction intersecting the extension direction of the first extension portion 440. The second extension portion 460 connects the second portion 470 and the third portion 450.

[0031] As shown in FIG. 5, the second portion 470 of this embodiment is perpendicular to the up-down direction. The second portion 470 has a flat plate shape extending in the second horizontal direction. As shown in FIG. 6, the second portion 470 is located on the -Y side of the first portion 430 in the second horizontal direction. As shown in FIG. 2, the second portion 470 is separated from the first edge 220 and parallel to the first edge 220. More specifically, the second portion 470 is separated from the first edge 220 and parallel to the first edge 220 over the entire length. The second portion 470 is located separated from the third portion 450 in the first horizontal direction. As shown in FIG. 6 again, in the second horizontal direction, the size S2 of the second portion 470 is smaller than the size S3 of the third portion 450. In the second horizontal direction, the distance D between the first portion 430 and the second portion 470 is smaller than the size S3 of the third portion 450. The second portion 470 has a second inner end 472 and a second outer end 476 .

[0032] 6, the second inner end 472 in this embodiment is the inner end of the second portion 470 in the second horizontal direction. That is, the second inner end 472 is the +Y end of the second portion 470 in the second horizontal direction. The second inner end 472 is connected to the second end 456 by the second extension portion 460. That is, the second extension portion 460 connects the second inner end 472 to the second end 456. In the second horizontal direction, the second inner end 472 is located more inward than the second end 456.

[0033] 6, the second extension portion 460 extends along a second straight line L2 connecting the second inner end portion 472 and the second end portion 456. However, the present invention is not limited to this, and the second extension portion 460 may extend along the second straight line L2 connecting the second inner end portion 472 and the second end portion 456, or may extend so as to bulge outward from the second straight line L2.

[0034] 6, the second outer end 476 in this embodiment is the outer end in the second horizontal direction of the second part 470. In other words, the second outer end 476 is the -Y end of the second part 470 in the second horizontal direction.

[0035] As shown in Fig. 5, the second connecting portion 480 of the present embodiment is perpendicular to the up-down direction. The second connecting portion 480 has a flat plate shape extending in the first horizontal direction. As shown in Fig. 6, the second connecting portion 480 connects the second terminal 490 and the second part 470. More specifically, the second connecting portion 480 connects the second outer end portion 476 and the second terminal 490.

[0036] 2, second terminal 490 in this embodiment is exposed to the outside of core 200. Second terminal 490 is provided on one side on the -Y side of a rectangle with rounded corners of core 200. First terminal 410 and second terminal 490 are located apart from each other in a second horizontal direction perpendicular to the first horizontal direction.

[0037] As shown in Figures 3 and 4, in the inductor 100 of this embodiment, the first portion 430, the second portion 470, the third portion 450, the first connecting portion 420, the second connecting portion 480, the first extension portion 440, and the second extension portion 460 are located on the same plane perpendicular to the up-down direction.

[0038] As shown in Figures 1 and 2, in the inductor 100 of this embodiment, the first portion 430, the second portion 470, the third portion 450, the first connecting portion 420, the second connecting portion 480, the first extension portion 440, and the second extension portion 460 are embedded in the core 200.

[0039] Second embodiment 7 and 8, an inductor 100A according to the second embodiment of the present invention has a similar configuration to the inductor 100 according to the first embodiment described above (see FIG. 1). Therefore, among the components shown in FIG. 7 and FIG. 8, the same components as those in the first embodiment are denoted by the same reference numerals. Furthermore, hereinafter, the same expressions as those in the first embodiment are used for the orientations and directions in this embodiment.

[0040] 8, the inductor 100A of the present embodiment includes a core 200 and a coil 400A. Here, the core 200 of the present embodiment is the same as the inductor 100 of the first embodiment, so a detailed description thereof will be omitted.

[0041] As shown in Fig. 8, the coil 400A of the present embodiment is a single-turn coil made of copper, similar to the coil 400 of the first embodiment. More specifically, the coil 400A has a first terminal 410, a second terminal 490, a first portion 430, a second portion 470, a third portion 450, a first connecting portion 420, a second connecting portion 480, a first extending portion 440A, and a second extending portion 460A. Here, the components of the present embodiment other than the first extending portion 440A and the second extending portion 460A are the same as those of the coil 400 of the first embodiment, and therefore detailed description thereof will be omitted.

[0042] 7, the first extension portion 440A of the present embodiment has a flat plate shape perpendicular to the up-down direction. The first extension portion 440A connects the first portion 430 and the third portion 450. More specifically, the first extension portion 440A connects the first inner end portion 436 and the first end portion 452.

[0043] 8, the first extension portion 440A of the present embodiment extends so as to bulge outward from a first straight line L1A connecting the first inner end portion 436 and the first end portion 452. The first extension portion 440A has a straight portion 442 and an inclined portion 445.

[0044] 8, the straight portion 442 of the present embodiment is perpendicular to the up-down direction. The straight portion 442 has a flat plate shape extending in the first horizontal direction. The straight portion 442 is connected to a first end 452 of the third part 450.

[0045] As shown in Fig. 7, the inclined portion 445 of the present embodiment is perpendicular to the up-down direction. As shown in Fig. 8, the inclined portion 445 has a flat plate shape that intersects with both the first horizontal direction and the second horizontal direction. The inclined portion 445 is connected to the straight portion 442. The inclined portion 445 is connected to the first inner end portion 436 of the first part 430.

[0046] As shown in Fig. 7, the second extension portion 460A of the present embodiment has a flat plate shape perpendicular to the up-down direction. As shown in Fig. 8, the second extension portion 460A is not parallel to the first extension portion 440A. The second extension portion 460A is a second portion. 470 and the third part 450 More specifically, the second extension portion 460A connects the second inner end portion 472 and the second end portion 456.

[0047] 8, the second extension portion 460A extends so as to bulge outward from a second straight line L2A connecting the second inner end portion 472 and the second end portion 456. The second extension portion 460A has a straight portion 462 and an inclined portion 465.

[0048] As shown in Fig. 7, the straight portion 462 of the present embodiment is perpendicular to the up-down direction. The straight portion 462 has a flat plate shape extending in the first horizontal direction. The straight portion 462 is connected to the second end 456 of the third part 450. As shown in Fig. 8, the straight portion 462 of the second extension portion 460A and the straight portion 442 of the first extension portion 440A are parallel to each other.

[0049] As shown in FIG. 7, the inclined portion 465 of this embodiment is perpendicular to the up-down direction. As shown in FIG. 8, the inclined portion 445 has a flat plate shape that intersects with both the first horizontal direction and the second horizontal direction. The inclined portion 465 of the second extension portion 460A is not parallel to the inclined portion 445 of the first extension portion 440A. The inclined portion 465 of the second extension portion 460A extends in a direction that intersects with the extension direction of the inclined portion 445 of the first extension portion 440A. The inclined portion 465 is connected to the straight portion 462. The inclined portion 465 is connected to the second inner end portion 472 of the second part 470.

[0050] Referring to FIG. 7, in inductor 100A of the present embodiment, first portion 430, second portion 470, third portion 450, first connecting portion 420, second connecting portion 480, first extension portion 440A, and second extension portion 460A are located on the same plane perpendicular to the up-down direction.

[0051] As shown in FIG. 8, in inductor 100A of this embodiment, first portion 430, second portion 470, third portion 450, first connecting portion 420, second connecting portion 480, first extension portion 440A, and second extension portion 460A are embedded in core 200.

[0052] (DC superposition characteristics) With reference to FIG. 11, the results of measuring the DC bias characteristics of the inductor 100 of the embodiment (see FIG. 1) and the inductor 700 of the comparative example (see FIGS. 9 and 10) will be described.

[0053] The inductor 100 of the embodiment was fabricated as follows with reference to FIGS. 1, 2 and 6. First, the coil 400 To The blank material was punched out from a single copper plate (thickness 0.2 mm). excluding the first terminal 410 and the second terminal 490. The part corresponding to the coil 400 is temporarily placed in the soft magnetic powder so that it is embedded in the soft magnetic powder, and then pressure is applied from above and below to form a coil 400 with a width of 0.3 mm. partThe buried core 200 was produced. Here, the core 200 was a substantially square column with a size of 4 mm in the first horizontal direction, a size of 4 mm in the second horizontal direction, and a size of 1.2 mm in the vertical direction. The size S1 of the first portion 430 in the second horizontal direction was 1.5 mm, the size S2 of the second portion 470 in the second horizontal direction was 1.5 mm, and the size S3 of the third portion 450 in the second horizontal direction was 3.3 mm. That is, in the second horizontal direction, the sizes S1 and S2 of the first portion 430 and the second portion 470 are smaller than the size S3 of the third portion 450. Furthermore, in the second horizontal direction, the distance D between the first portion 430 and the second portion 470 in the second horizontal direction was 0.3 mm. That is, in the second horizontal direction, the distance D between the first portion 430 and the second portion 470 is smaller than the size S3 of the third portion 450. In addition, each of the first portion 430 and the second portion 470 was 0.3 mm away from the first edge 220 of the core 200, and the third portion 450 was 0.3 mm away from the second edge 250 of the core 200. Furthermore, the first portion 430, the first extension portion 440, the third portion 450, the second extension portion 460, and the second portion 470 were disposed in the center in the up-down direction of the core 200. After the core 200 was pressure-molded, the portions of the blank material exposed to the outside that correspond to the first terminal 410 and the second terminal 490 were bent downward to form the first terminal 410 and the second terminal 490 each having a size of 1.6 mm in the first horizontal direction, and the inductor 100 was completed.

[0054] Moreover, the inductor 700 of the comparative example was fabricated in the same manner as the inductor 100 of the above-described embodiment, except that only the shape of the coil 800 was different.

[0055] 9 and 10, the inductor 700 of the comparative example includes a core 200 and a coil 800, and the core 200 of the inductor 700 of the comparative example has a similar configuration to the core 200 of the inductor 100 of the embodiment. The coil 800 also has a first terminal 810, a second terminal 890, a first portion 830, a second portion 870, a third portion 850, a first connecting portion 820, a second connecting portion 880, a first extending portion 840, and a second extending portion 860, and among these components, the first terminal 810, the second terminal 890, the first connecting portion 820, and the second connecting portion 880 have a similar configuration to the first terminal 410, the second terminal 490, the first connecting portion 420, and the second connecting portion 480 of the coil 400 of the inductor 100 of the embodiment. In the coil 800, the size of the first portion 830 and the second portion 870 in the second horizontal direction was 1.3 mm, and the size of the third portion 850 in the second horizontal direction was 1.3 mm. That is, in the second horizontal direction, the size of each of the first portion 830 and the second portion 870 was the same as the size of the third portion 850. Furthermore, each of the first portion 830 and the second portion 870 was 0.3 mm away from the first edge 220 of the core 200, and the third portion 450 was 0.3 mm away from the second edge 250 of the core 200. In addition, the first portion 830, the first extension portion 840, the third portion 850, the second extension portion 860, and the second portion 870 were disposed in the center of the core 200 in the up-down direction.

[0056] 9 and 10, the first portion 830 has a first outer end 832 and a first inner end 836. The second portion 870 has a second outer end 876 and a second inner end 872. The third portion 850 has a first end 852 and a second end 856. Unlike the inductor 100 of the embodiment, in the second horizontal direction, the first inner end 836 is located at the same position as the first end 852, and the second inner end 872 is located at the same position as the second end 856. The first extension portion 840 connects the first inner end 836 and the first end 852, and the second extension portion 860 connects the second inner end 872 and the second end 856. The first extension portion 840 and the second extension portion 860 each extend along the first horizontal direction, unlike the first extension portion 440 and the second extension portion 460 of the coil 400 of the inductor 100 of the embodiment. That is, the first extension portion 840 and the second extension portion 860 extend parallel to each other over their entire lengths.

[0057] The measurement results of the DC superposition characteristics of the inductor 100 of the embodiment and the inductor 700 of the comparative example are shown in Fig. 11. As a result, the saturation current value at which the L value decreases by 20% in the inductor 100 of the embodiment is 33 A, whereas the saturation current value at which the L value decreases by 20% in the inductor 700 of the comparative example is 30 A, and it was found that the inductor 100 of the embodiment has better DC superposition characteristics than the inductor 700 of the comparative example.

[0058] Although the present invention has been specifically described above with reference to the embodiment, the present invention is not limited to this and various modifications and changes are possible.

[0059] Although the core 200 of the inductor 100, 100A of the present embodiment has a substantially square columnar shape, the present invention is not limited to this. That is, as long as the first portion 430 and the second portion 470 of the coil 400, 400A are along the first edge 220 of the core 200 and the third portion 450 of the coil 400, 400A are along the second edge 250 of the core 200, the core 200 may be in a cylindrical shape or the like.

[0060] Although the coil 400, 400A of the inductor 100, 100A in the present embodiment is a single-turn coil, the present invention is not limited to this. That is, the coil 400, 400A may be a multiple-turn coil. Specifically, the coil 400, 400A may be configured such that the third portion 450 is divided into two parts, and a loop extending inward from each end of the division is added.

[0061] Although coil 400A of inductor 100A in this embodiment has inclined portions 445, 465, the present invention is not limited to this. That is, coil 400A of inductor 100A may have, instead of inclined portions 445, 465, two connection portions each having a step shape when viewed in the up-down direction and not extending parallel to each other over the entire length. [Explanation of symbols]

[0062] 100,100A inductor 200 cores 220 First Edge 250 Second Edge 400,400A coil 410 1st terminal 420 1st connection part 430 Part 1 432 First outer end 436 First inner end 440,440A 1st section 442 Straight section 445 oblique part 450 Part 3 452 First end 456 Second end 460,460A Second extension 462 Straight section 465 oblique part 470 Part 2 472 Second inner end 476 Second outer end 480 2nd connection part 490 2nd terminal 700 Inductor 800 coils 810 First terminal 820 First connecting part 830 First part 832 First outer end 836 First inner end 840 First extension 850 Third part 852 First end 856 Second end 860 Second extension 870 Second part 872 Second inner end 876 Second outer end 880 Second connecting part 890 Second terminal D Spacing L1, L1A First straight line L2, L2A Second straight line S1 Size S2 Size S3 Size

Claims

1. An inductor comprising a core and a coil, The core has a first edge and a second edge, the first edge and the second edge are spaced apart from each other in a first horizontal direction; the coil has a first terminal, a second terminal, a first portion, a second portion, a third portion, a first connecting portion, a second connecting portion, a first extending portion, and a second extending portion; the first terminal and the second terminal are spaced apart from each other in a second horizontal direction perpendicular to the first horizontal direction, each of the first portion and the second portion is spaced apart from and parallel to the first edge and is spaced apart from the third portion in the first horizontal direction; In the second horizontal direction, a size of each of the first portion and the second portion is smaller than a size of the third portion; the third portion is spaced apart from and parallel to the second edge, the first connecting portion connects the first terminal and the first portion, the second connecting portion connects the second terminal and the second portion, The first extension portion connects the first portion and the third portion, The second extension portion connects the second portion and the third portion, the first portion, the second portion, the third portion, the first connecting portion, the second connecting portion, the first extending portion, and the second extending portion are embedded in the core, In the first horizontal direction, the first portion is located outside both the first terminal and the second terminal, the first portion is located between the first terminal and the first edge in the first horizontal direction, the first portion is located between the second terminal and the first edge in the first horizontal direction, the second portion is located outboard of both the first terminal and the second terminal in the first horizontal direction, the second portion is located between the first terminal and the first edge in the first horizontal direction, the second portion is located between the second terminal and the first edge in the first horizontal direction, the third portion is located outboard of both the first terminal and the second terminal in the first horizontal direction, the third portion is located between the first terminal and the second edge in the first horizontal direction, the third portion is located between the second terminal and the second edge in the first horizontal direction, an end portion of the first connection portion on the first terminal side is closer to the first edge than to the second edge; an end portion of the second connection portion on the second terminal side is closer to the first edge than to the second edge; The third portion has a first end and a second end, the first end portion and the first connecting portion are aligned in the first horizontal direction, The second end portion and the second connecting portion are aligned in the first horizontal direction, The coil has a shape symmetrical with respect to a straight line perpendicular to the second horizontal direction and passing through a center of the third portion in the second horizontal direction. Inductor.

2. 2. The inductor of claim 1, The first section has a first outer end and a first inner end, the first connecting portion connects the first outer end portion and the first terminal, The second section has a second outer end and a second inner end, the second connecting portion connects the second outer end portion and the second terminal, In the second horizontal direction, the first inner end portion is located more inward than the first end portion, The first extension portion connects the first inner end portion and the first end portion, In the second horizontal direction, the second inner end portion is located more inward than the second end portion, The second extension portion connects the second inner end portion and the second end portion. Inductor.

3. 3. The inductor of claim 2, the first extension portion extends along a first straight line connecting the first inner end portion and the first end portion, or extends so as to bulge outward from the first straight line, The second extension portion extends along a second straight line connecting the second inner end portion and the second end portion, or extends so as to bulge outward from the second straight line. Inductor.

4. An inductor according to any one of claims 1 to 3, Each of the first extension portion and the second extension portion extends at least partially in a direction intersecting the first horizontal direction. Inductor.

5. An inductor according to any one of claims 1 to 4, The first edge and the second edge extend parallel to each other. Inductor.

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