Coil component

Abstract

The invention relates to a coil component which can reduce adverse effects on characteristics of the coil component. A coil component (10) is provided with a drum-shaped core (10C), a first wire (50), and a second wire (60). The drum-shaped core has a winding core portion (11), a first flange portion (21), and a second flange portion (31). The second wire is provided with a first winding section (71), a second winding section (72), and a third winding section (73). The second winding portion is located on a second flange portion (31) side with respect to the first winding portion in a direction along the central axis X, and at least a portion of the second winding portion is wound around an outer peripheral surface of the winding core portion. When the second wire travels from the first end (61) to the second end (62) in the second winding portion, the second wire has a first intersection portion (81) and a second intersection portion (82) that intersect with a specific one turn of the first wire in a range of two turns of winding.

Description

Technical Field

[0001] The present invention relates to a coil component. Background Art

[0002] The coil component described in Patent Document 1 includes a drum core, four external electrodes, a first wire rod, and a second wire rod. The drum core includes a winding core portion, a first flange portion, and a second flange portion. The winding core portion is a quadrangular prism. The first flange portion is connected to the first end of the winding core portion. The second flange portion is connected to the second end of the winding core portion. Two of the four external electrodes are located on the surface of the first flange portion. The remaining two external electrodes are located on the surface of the second flange portion.

[0003] A first wire is wound around the winding core. A first end of the first wire is connected to an external electrode on the first flange. A second end of the first wire is connected to an external electrode on the second flange. A second wire is wound around the winding core. A first end of the second wire is connected to an external electrode on the first flange. A second end of the second wire is connected to an external electrode on the second flange. The second wire is wound in the same direction as the first wire. Furthermore, the second wire is wound around the outside of the first wire as a whole.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2018-120887

[0005] In the coil component described in Patent Document 1, the second wire is wound around the outside of the first wire as a whole. Therefore, the length of the portion of the second wire wound around the winding core is longer than the length of the portion of the first wire wound around the winding core. The longer the length of the wire wound around the winding core, the greater the DC resistance of the wire. Therefore, the difference between the length of the first wire wound around the winding core and the length of the second wire wound around the winding core becomes larger, thereby increasing the difference in DC resistance of each wire. Due to this difference in DC resistance, there is a risk of adversely affecting the characteristics required as a coil component. Summary of the Invention

[0006] In order to solve the above-mentioned problems, the present invention relates to a coil component, which comprises: a drum-shaped core body having a columnar winding core portion, a first flange portion provided at a first end in a direction along the central axis of the above-mentioned winding core portion, and a second flange portion provided at a second end opposite to the above-mentioned first end in the above-mentioned winding core portion; a first external electrode and a second external electrode provided on the above-mentioned first flange portion; a third external electrode and a fourth external electrode provided on the above-mentioned second flange portion; a first wire rod wound on the above-mentioned winding core portion, the first end of the above-mentioned first wire rod being connected to the above-mentioned first external electrode, and the second end of the above-mentioned first wire rod being connected to the above-mentioned third external electrode; and a second wire rod wound on the above-mentioned winding core portion in the same direction as the above-mentioned first wire rod, the first end of the above-mentioned second wire rod being connected to the above-mentioned second external electrode, and the first end of the above-mentioned second wire rod being connected to the above-mentioned The two ends are connected to the above-mentioned fourth external electrode, and the above-mentioned second wire rod includes: a first winding portion, in which multiple turns of the above-mentioned first winding portion are wound on the outer peripheral side relative to the above-mentioned first wire rod; a second winding portion, which is located on the second flange portion side relative to the above-mentioned first winding portion in the direction along the above-mentioned central axis, and at least a portion of the above-mentioned second winding portion is wound on the outer peripheral surface of the above-mentioned winding core portion; and a third winding portion, which is located on the second flange portion side relative to the above-mentioned second winding portion in the direction along the above-mentioned central axis, and multiple turns of the above-mentioned third winding portion are wound on the outer peripheral side relative to the above-mentioned first wire rod. When the above-mentioned second wire rod travels from the above-mentioned first end to the above-mentioned second end in the above-mentioned second winding portion, the above-mentioned second wire rod has a first intersection portion and a second intersection portion that intersect with a specific one turn of the above-mentioned first wire rod within the range of winding two turns.

[0007] According to the above configuration, it is possible to reduce adverse effects on the characteristics of the coil component. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a perspective view of the coil component according to the first embodiment.

[0009] Figure 2 It is a plan view of the coil component according to the first embodiment.

[0010] Figure 3 It is a diagram illustrating the winding state of each wire material when the coil component according to the first embodiment is viewed in the downward direction.

[0011] Figure 4 This is a diagram illustrating the winding state of each wire material when the coil component according to the first embodiment is viewed toward the left.

[0012] Figure 5 It is a diagram illustrating the winding state of each wire material when the coil component according to the second embodiment is viewed in the downward direction.

[0013] Figure 6This is a diagram illustrating the winding state of each wire material when the coil component according to the second embodiment is viewed toward the left.

[0014] Figure 7 It is a diagram illustrating the winding state of each wire material when the coil component according to the third embodiment is viewed in the downward direction.

[0015] Figure 8 This is a diagram illustrating the winding state of each wire material when the coil component according to the third embodiment is viewed toward the left.

[0016] Explanation of the reference numerals: 10…coil component; 10C…drum-shaped core; 11…winding core portion; 21…first flange portion; 31…second flange portion; 10F…plate-shaped core; 41…first external electrode; 42…second external electrode; 43…third external electrode; 44…fourth external electrode; 50…first wire; 60…second wire; 71…first winding portion; 72…second winding portion; 73…third winding portion; 81…first intersection portion; 82…second intersection portion. DETAILED DESCRIPTION

[0017] Hereinafter, a first embodiment, a second embodiment, and a third embodiment of the coil component will be described with reference to the accompanying drawings. In addition, the accompanying drawings may sometimes show components enlarged for easier understanding. The dimensional ratios of the components may sometimes differ from the actual dimensional ratios or the dimensional ratios in other drawings.

[0018] (Regarding the first embodiment)

[0019] like Figure 1 As shown, the coil component 10 includes a drum-shaped core 10C and a plate-shaped core 10F.

[0020] The drum-shaped core 10C includes a winding core portion 11 , a first flange portion 21 , and a second flange portion 31 .

[0021] The winding core 11 is in the shape of a quadrangular prism and is made of, for example, alumina, Ni—Zn ferrite, synthetic resin, or a mixture thereof.

[0022] The first flange portion 21 is provided at the first end of the core portion 11 in the direction along the central axis X. Specifically, the first flange portion 21 is connected to the first end of the core portion 11 in the direction along the central axis X. The second flange portion 31 is provided at the second end of the core portion 11 in the direction along the central axis X. Specifically, the second flange portion 31 is connected to the second end of the core portion 11 in the direction along the central axis X. The material of the first flange portion 21 and the second flange portion 31 is the same as that of the core portion 11. In addition, the first flange portion 21 and the second flange portion 31 are integrally formed with the core portion 11.

[0023] Here, a specific axis perpendicular to the central axis X is defined as the vertical axis Y. In the first embodiment, when viewed in the direction along the central axis X, the vertical axis Y is a direction perpendicular to the mounting surface when the coil component 10 is mounted on the substrate. Furthermore, when viewed in the direction along the central axis X, the vertical axis Y is parallel to the short side of the core portion 11. Furthermore, an axis perpendicular to both the central axis X and the vertical axis Y is defined as the horizontal axis Z. In the first embodiment, when viewed in the direction along the central axis X, the horizontal axis Z is parallel to the long side of the core portion 11. Furthermore, one of the directions along the central axis X is defined as a first positive direction X1, and the direction opposite to the first positive direction X1 is defined as a first negative direction X2. In the first embodiment, the first positive direction X1 coincides with the direction from the core portion 11 toward the first flange portion 21. The first negative direction X2 coincides with the direction from the core portion 11 toward the second flange portion 31. Furthermore, one of the directions along the vertical axis Y is defined as an upward direction Y1, and the direction opposite to the upward direction Y1 is defined as a downward direction Y2. Furthermore, one of the directions along the left-right axis Z is referred to as the right direction Z1, and the direction opposite to the right direction Z1 is referred to as the left direction Z2. The upward direction Y1 and downward direction Y2 mentioned here are for convenience only and do not specify the direction of gravity. Furthermore, the right direction Z1 and left direction Z2 are also for convenience only and are not limited to left and right directions from a specific viewpoint.

[0024] In this disclosure, the term "upper surface" refers to the surface facing the upper direction Y1 along the vertical axis Y, and the term "lower surface" refers to the surface facing the lower direction Y2. Furthermore, the term "upper surface" may not necessarily be strictly orthogonal to the upper direction Y1. For example, when viewing the coil component 10 from the upper direction Y1 toward the lower direction Y2, the surface that can be visually identified is the "upper surface of the coil component 10." The same applies to the lower surface.

[0025] When viewed along the central axis X, the first flange portion 21 extends outward relative to the winding core 11 in directions along the vertical axis Y and the horizontal axis Z. The first flange portion 21 is symmetrical with respect to an imaginary plane passing through and parallel to the central axis X. The first flange portion 21 has an outer end surface 21A. The outer end surface 21A is the surface of the outer surface of the first flange portion 21 that faces the first positive direction X1.

[0026] The first flange portion 21 includes a main body portion 22 and a protruding portion 23. The main body portion 22 is a generally rectangular parallelepiped having a thin thickness along the central axis X. When viewed in the first negative direction X2, the upper and lower edges of the main body portion 22 in the direction Y1 and Y2 are parallel to the horizontal axis Z. Furthermore, when viewed in the first negative direction X2, the left and right edges of the main body portion 22 in the direction Z2 and Z1 are parallel to the vertical axis Y.

[0027] The protrusion 23 protrudes upward in the direction Y1 from the upper surface of the main body 22. The protrusion 23 has a rectangular pyramidal shape, with its dimensions decreasing along the horizontal axis Z as it approaches the upper direction Y1. The protrusion 23 is located approximately at the center of the main body 22 along the horizontal axis Z. The dimensions of the protrusion 23 along the central axis X are identical to those of the main body 22 along the central axis X. Furthermore, the main body 22 and the protrusion 23 are integrally formed. That is, within the first flange 21, there is no clear boundary between the main body 22 and the protrusion 23.

[0028] The second flange portion 31 and the first flange portion 21 are symmetrically shaped with respect to an imaginary plane passing through the center of the core portion 11 and parallel to the left-right axis Z. That is, when viewed from the direction along the center axis X, the second flange portion 31 extends outward relative to the core portion 11 in the direction along the up-down axis Y and in the direction along the left-right axis Z. Moreover, the second flange portion 31 has an outer end surface 31A facing the first negative direction X2. The second flange portion 31 has a main body portion 32 and a protrusion 33. The structure of the main body portion 32 and the protrusion 33 of the second flange portion 31 is the same as that of the main body portion 22 and the protrusion 23 of the first flange portion 21. That is, the protrusion 33 protrudes from the upper surface of the main body portion 32 in the upward direction Y1.

[0029] The plate-like core 10F is a rectangular plate. The long side of the plate-like core 10F is parallel to the central axis X. The short side of the plate-like core 10F is parallel to the left-right axis Z. The plate-like core 10F is located on the lower side in the direction Y2 relative to the drum-like core 10C. The plate-like core 10F is connected to both the lower surface in the first flange portion 21 and the lower surface in the second flange portion 31. In other words, the plate-like core 10F is mounted between the first flange portion 21 and the second flange portion 31. The material of the plate-like core 10F is the same as that of the drum-like core 10C.

[0030] The coil component 10 includes a first external electrode 41 , a second external electrode 42 , a third external electrode 43 , and a fourth external electrode 44 .

[0031] The first external electrode 41 is provided on the first flange portion 21. That is, the first external electrode 41 is attached to the first flange portion 21. The first external electrode 41 is located on the left side in the direction Z2 relative to the central axis X in the first flange portion 21.

[0032] The first external electrode 41 includes an adhesive portion AP, a connecting portion BP, a mounting portion CP, an extension portion DP, and a joint portion EP. Furthermore, the adhesive portion AP, connecting portion BP, mounting portion CP, extension portion DP, and joint portion EP are integrally formed. That is, within the first external electrode 41, there are no clear boundaries between these components.

[0033] The bonding portion AP is substantially plate-shaped and is attached to the outer end surface 21A of the first flange portion 21 via an adhesive. The bonding portion AP is a portion of the first external electrode 41 that faces the outer end surface 21A of the first flange portion 21 in the direction along the central axis X.

[0034] The connecting portion BP is connected to the end portion of the adhesive portion AP in the upper direction Y1. The connecting portion BP is generally plate-shaped. The connecting portion BP extends from the adhesive portion AP in the upper direction Y1. That is, when viewed in the first negative direction X2, the connecting portion BP protrudes from the first flange portion 21 in the upper direction Y1. Specifically, the connecting portion BP protrudes toward the upper direction Y1 relative to the protrusion 23 of the first flange portion 21. The connecting portion BP bends approximately 90 degrees toward the first negative direction X2 midway. That is, the end portion of the connecting portion BP on the opposite side of the adhesive portion AP faces the first negative direction X2.

[0035] The mounting portion CP is connected to the end portion of the connecting portion BP on the opposite side to the bonding portion AP. The mounting portion CP is in the shape of a flat plate. The main surface of the mounting portion CP is orthogonal to the upper and lower axes Y. In addition, the mounting portion CP is the portion of the first external electrode 41 that is located on the uppermost side in the direction Y1. The mounting portion CP is separated from the protrusion 23 of the first flange portion 21 toward the upper direction Y1. In other words, there is a gap between the mounting portion CP and the first flange portion 21. In addition, the upper surface of the mounting portion CP is the mounting surface that is opposite to the substrate when the coil component 10 is mounted on the substrate.

[0036] The first end of the extension portion DP is connected to the end of the mounting portion CP on the left side in the direction Z2. The extension portion DP is generally plate-shaped. The extension portion DP extends from the mounting portion CP at a generally oblique angle toward the left side in the direction Z2 and downward in the direction Y2. In other words, when viewed from the direction along the central axis X, the extension portion DP is generally L-shaped.

[0037] The joint portion EP is connected to the second end of the extension portion DP. The joint portion EP is generally plate-shaped. When viewed in the downward direction Y2, the joint portion EP is a substantially rectangular shape that is long in the direction along the central axis X.

[0038] The joint EP is opposite to the upper surface of the main body 22 of the first flange portion 21 along the up-down axis Y. That is, the lower surface of the joint EP is opposite to the upper surface of the first flange portion 21. The lower surface of the joint EP is in contact with the upper surface of the first flange portion 21. On the other hand, the lower surface of the joint EP is not fixed to the first flange portion 21. That is, no adhesive or the like is sandwiched between the joint EP and the first flange portion 21. In this way, if the joint EP to which the end of the wire is connected is located on the upper direction Y1 side of the first flange portion 21 relative to the center axis X, it can be said that the first external electrode 41 is located on the upper direction Y1 side of the first flange portion 21 relative to the center axis X.

[0039] The second external electrode 42 is provided on the first flange portion 21. In other words, the second external electrode 42 is attached to the first flange portion 21. The second external electrode 42 is located on the right side of the first flange portion 21 in the direction Z1 relative to the central axis X. The second external electrode 42 and the first external electrode 41 are symmetrical with respect to an imaginary plane passing through the central axis X and orthogonal to the left-right axis Z. Therefore, the second external electrode 42 has an adhesive portion AP, a connecting portion BP, a mounting portion CP, an extending portion DP, and a joining portion EP. Furthermore, the second external electrode 42 is located on the upper side of the first flange portion 21 in the direction Y1 relative to the central axis X.

[0040] The third external electrode 43 is provided on the second flange portion 31. That is, the third external electrode 43 is mounted on the second flange portion 31. The third external electrode 43 is located on the left side Z2 relative to the center axis X at the second flange portion 31. That is, the third external electrode 43 is opposite to the first external electrode 41 in the direction along the center axis X. The third external electrode 43 and the first external electrode 41 are symmetrical with respect to an imaginary plane passing through the center of the winding core portion 11 and parallel to the left-right axis Z. Therefore, as Figure 2 As shown, the third external electrode 43 includes an adhesive portion AP, a connecting portion BP, a mounting portion CP, an extending portion DP, and a joint portion EP.

[0041] like Figure 1 As shown, the fourth external electrode 44 is provided on the second flange portion 31. That is, the fourth external electrode 44 is mounted on the second flange portion 31. The fourth external electrode 44 is located on the right side Z1 relative to the center axis X at the second flange portion 31. That is, the fourth external electrode 44 is opposite to the second external electrode 42 in the direction along the center axis X. The fourth external electrode 44 and the second external electrode 42 are symmetrical with respect to an imaginary plane passing through the center of the winding core portion 11 and parallel to the left-right axis Z. Therefore, as shown in FIG. Figure 2 As shown, the fourth external electrode 44 includes an adhesive portion AP, a connecting portion BP, a mounting portion CP, an extending portion DP, and a joint portion EP.

[0042] <About the First and Second Wires>

[0043] like Figure 2 As shown, the coil component 10 includes a first wire 50 and a second wire 60. Although not shown in the figure, the first wire 50 has a copper wire and an insulating coating. The insulating coating covers the outer surface of the copper wire. The first wire 50 is roughly circular in a cross section perpendicular to the direction in which the first wire 50 extends. The first wire 50 has a first end 51 and a second end 52 on the opposite side of the first end 51. In addition, Figures 3 to 8In FIG. 5 , the first wire 50 is colored using dots.

[0044] like Figure 1 as well as Figure 2 As shown, the first end 51 of the first wire 50 is connected to the joint EP of the first external electrode 41 by thermocompression bonding. The second end 52 of the first wire 50 is also connected to the joint EP of the third external electrode 43 by thermocompression bonding. Thermocompression bonding involves sandwiching the wire between an external electrode and a heated jig, melting the wire, and securing it to the external electrode. As a result of this securing method, the insulating coating peels off near the joint with the external electrode, exposing the copper wire.

[0045] Here, when the first wire 50 advances from the first end 51 to the second end 52, the portion that first contacts the outer peripheral surface of the winding core 11 is the portion of 1.0 turns of the first wire 50. In the first embodiment, the portion of 1.0 turns of the first wire 50 is located on the ridgeline of the winding core 11 on the right side in the direction Z1 and on the upper side in the direction Y1.

[0046] like Figure 3 as well as Figure 4 As shown, the number of turns of the first wire 50 increases one by one with each turn from the first end 51 to the second end 52 with the central axis X as the center. When the first wire 50 is viewed in the first negative direction X2, it is wound on the winding core 11 in a clockwise manner as the number of turns increases. Therefore, for example, when viewed in the first negative direction X2, the portion that moves 36 degrees from the portion of the 1.0 turn of the first wire 50 with the central axis X as the center is the portion of the 1.1 turn of the first wire 50. In addition, Figure 3 , the number of turns of each wire at the ridgeline position on the upper Y1 side of the winding core 11 is schematically shown. Figure 4 , the number of turns of each wire located on the central axis X of the winding core 11 is schematically shown when viewed in the left direction Z2.

[0047] like Figure 3 As shown, the first wire 50 is directly wound around the outer peripheral surface of the winding core 11 without sandwiching the second wire 60 over the entire circumference. Here, direct winding includes not only a state in which the wire is in contact with the outer peripheral side of the winding core 11, but also a state in which the wire is wound without sandwiching other wires between the winding core 11 even when the wire is floating.

[0048] In addition, the first turn of the first wire 50 represents the section from the 1.0 turn portion to the portion immediately before the 2.0 turn portion of the first wire 50. In this regard, the same applies to the second wire 60. In addition, the final turn of the first wire 50 is the turn including the portion that contacts the outer peripheral side of the winding core 11 when the first wire 50 moves from the first end 51 to the second end 52. In addition, Figure 3 as well as Figure 4 In the figure, a portion located closer to the first end than 1.0 turn of each wire rod is shown as 0 turn.

[0049] like Figure 2 As shown, the second wire 60 has the same structure as the first wire 50. That is, the second wire 60 includes a copper wire and an insulating coating. The second wire 60 has a first end 61 and a second end 62 opposite to the first end 61.

[0050] The first end 61 of the second wire 60 is connected to the joint EP of the second external electrode 42 by thermocompression bonding. The second end 62 of the second wire 60 is connected to the joint EP of the fourth external electrode 44 by thermocompression bonding.

[0051] Here, if Figure 3 as well as Figure 4 As shown, when the second wire 60 travels from the first end 61 to the second end 62, the portion whose angular position about the central axis X initially coincides with the angular position of the portion having 1 turn of the first wire 50 is defined as the portion having 1 turn of the second wire 60. That is, in the first embodiment, when viewed in the direction along the central axis X, the portion having 1 turn of the second wire 60 is located on a straight line connecting a ridgeline on the right side Z1 and the upper side Y1 of the winding core 11 and the central axis X.

[0052] The number of turns of the second wire 60 increases by one with each winding from the first end 61 to the second end 62 about the central axis X. The second wire 60 is wound around the winding core 11 in a clockwise direction as the number of turns increases, as viewed in the first negative direction X2. That is, the second wire 60 is wound in the same direction as the first wire 50. Furthermore, a portion of the second wire 60 is wound around the winding core 11 from the outside relative to the first wire 50. In other words, a portion of the second wire 60 contacts the outer circumferential surface of the first wire 50 opposite the surface facing the central axis X. Furthermore, the final turn of the second wire 60 includes the portion that last contacts the outer circumferential surface of the winding core 11 as the second wire 60 travels from the first end 61 to the second end 62.

[0053] <Regarding the Winding Form of the First and Second Wires>

[0054] like Figure 3As shown, in the first embodiment, the last turn of the first wire 50 is the 30th turn. In the first embodiment, the last turn of the second wire 60 is the 30th turn.

[0055] As described above, the first wire 50 is wound directly around the outer circumference of the winding core 11 without sandwiching the second wire 60. The turns of the first wire 50 from the 1st turn to the 15th turn are in contact with each other along the central axis X. Meanwhile, the 15th turn and the 16th turn of the first wire 50 are separated along the central axis X. Furthermore, from the 16th turn to the 28th turn of the first wire 50, the turns are in contact with each other along the central axis X.

[0056] Furthermore, the 28.0 turns portion of the first wire 50 and the 29.0 turns portion of the first wire 50 are in contact with each other in the direction along the central axis X. Meanwhile, at the ridgeline on the upper side in the direction Y1 and the left side in the direction Z2 of the winding core 11, the 28th and 29th turns of the first wire 50 are separated in the direction along the central axis X. Furthermore, the 30th turn of the first wire 50 is separated from the 29th turn of the first wire 50 in the direction along the central axis X.

[0057] like Figure 2 as well as Figure 3 As shown, the second wire rod 60 includes a first winding portion 71 , a second winding portion 72 , a third winding portion 73 , and a fourth winding portion 74 .

[0058] like Figure 3 As shown, the first winding portion 71 is the portion of the second wire 60 that is wound around the outer circumference of the first wire 50 in multiple turns. In the first embodiment, the first winding portion 71 is the portion from the first turn to the fourteenth turn of the second wire 60. In other words, the first winding portion 71 is the portion of the second wire 60 from the portion that overlaps the outer circumference of the first wire 50 to the portion immediately before being directly wound around the outer circumference of the winding core 11.

[0059] Here, I is a positive integer. Furthermore, the groove formed between two adjacent turns of the wire is referred to as the wire valley. In this case, in the first wound portion 71, the first turn of the second wire 60 is located between the first turn of the first wire 50 and the (1+1)th turn of the first wire 50. Specifically, for example, the first turn of the second wire 60 is located in the valley between the first turn of the first wire 50 and the second turn of the first wire 50.

[0060] The second wound portion 72 is located on the second flange portion 31 side relative to the first wound portion 71 in the direction along the central axis X. The second wound portion 72 is the portion of the second wire 60 where at least a portion is wound around the outer circumference of the winding core 11. Specifically, the second wound portion 72 is the portion from midway through the 14th turn of the second wire 60 to midway through the 17th turn. The 15th, 16th, and 17th turns of the second wire 60 are wound directly around the outer circumference of the winding core 11 between the 15th and 16th turns of the first wire 50.

[0061] Furthermore, the second wire 60 crosses the 15th turn of the first wire 50 at the 15th and 16th turns of the second wire 60. "Crossing" here means that when one wire is moved from the first end to the second end, the one wire that is on the same layer as the other wire temporarily overlaps the outer peripheral side of the other wire and then returns to the same layer as the other wire.

[0062] Specifically, the 15th turn of the second wire 60 has a first intersection 81 intersecting the 15th turn of the first wire 50 . Furthermore, the 16th turn of the second wire 60 has a second intersection 82 intersecting the 15th turn of the first wire 50 .

[0063] That is, in the second winding portion 72, when the second wire 60 advances from the first end 61 to the second end 62, the second wire 60 has a first intersection 81 and a second intersection 82 that intersect with a specific turn of the first wire 50 within the range of winding two turns. Figure 2 As shown in FIG. 1 , when viewed in a direction perpendicular to the central axis X of the winding core 11 , a portion where the center lines of the wires overlap is referred to as an “intersection portion”.

[0064] like Figure 3 As shown, the first intersection 81 is a portion where the second wire 60 crosses the first wire 50 from the second flange portion 31 side to the first flange portion 21 side in the direction along the central axis X when the second wire 60 travels from the first end 61 to the second end 62. Similarly, the second intersection 82 is a portion where the second wire 50 crosses from the second flange portion 31 side to the first flange portion 21 side in the direction along the central axis X.

[0065] The first intersection 81 and the second intersection 82 are located on the outer circumference of the winding core 11, facing the upward direction Y1. That is, the joint EP between the first intersection 81, the second intersection 82, and the first external electrode 41 is located on the mounting surface. In other words, the first intersection 81 and the second intersection 82 are located on the outer circumference of the winding core 11, facing the upward direction Y1, relative to the central axis X. Therefore, the first intersection 81 is located approximately 15.75 turns later in the 15th turn. Similarly, the second intersection 82 is located approximately 16.75 turns later in the 16th turn.

[0066] The second wire 60 overlaps the outer circumference of the first wire 50 from the outer circumferential surface of the winding core 11 midway through its 17th turn. Specifically, the second wire 60 overlaps the outer circumference of the first wire 50 within a range of 17.5 turns or more and less than 18.0 turns. Furthermore, the portion of the second wire 60 that overlaps the outer circumference of the first wire 50 during its 17th turn is the valley between the 16th turns of the first wire 50 and the 16th turns of the second wire 60.

[0067] The third wound portion 73 is located on the second flange portion 31 side relative to the second wound portion 72 in the direction along the central axis X. The third wound portion 73 is the portion of the second wire 60 that is wound around the outer circumference of the first wire 50 in multiple turns. In the first embodiment, the third wound portion 73 is the portion from midway through the 17th turn to midway through the 28th turn of the second wire 60. In other words, the third wound portion 73 is the portion of the second wire 60 that extends from the portion that overlaps the outer circumference of the first wire 50 to the portion immediately before being directly wound around the outer circumference of the winding core 11.

[0068] The 17th turn of the second wire 60 is located in the valley between the 16th turn of the second wire 60 and the 16th turn of the first wire 50 on the ridgeline of the winding core 11 on the upper side in the Y1 direction and the left side in the Z2 direction. Furthermore, midway between the 18th turn of the second wire 60 and the 23rd turn of the second wire 60, the first turn of the second wire 60 is located in the valley between the (1-2)th turn of the first wire 50 and the (1-1)th turn of the first wire 50.

[0069] Furthermore, the second wire 60 straddles the 22nd and 23rd turns of the first wire 50 at its 23rd turn. "Strapping" here means that one wire crosses over the other wire without reaching the same layer as the other wire. Thus, due to the presence of the straddling portion, the second wire 60 has a portion contacting the 22nd, 23rd, and 24th turns of the first wire 50 within the range of one turn.

[0070] Specifically, the 23rd turn of the second wire 60 has a first spanning portion 91 spanning the 22nd turn of the first wire 50. In addition, the 23rd turn of the second wire 60 has a second spanning portion 92 spanning the 23rd turn of the first wire 50. In addition, in this embodiment, Figure 2 As shown in FIG. 1 , when viewed in a direction perpendicular to the central axis X of the winding core 11 , a portion where the center lines of the wires overlap is referred to as a “crossing portion”.

[0071] like Figure 3 As shown, the first spanning portion 91 is a portion that spans the first wire 50 from the first flange portion 21 side to the second flange portion 31 side in the direction along the central axis X when the second wire 60 travels from the first end 61 to the second end 62. Similarly, the second spanning portion 92 is a portion that spans the first wire 50 from the first flange portion 21 side to the second flange portion 31 side in the direction along the central axis X.

[0072] The 24.0 turns of the second wire 60 are located in the valley between the 24th turn of the first wire 50 and the 25th turn of the first wire 50. Furthermore, midway between the 24th turn of the second wire 60 and the 28th turn of the second wire 60, the 1st turn of the second wire 60 is located in the valley between the 1st turn of the first wire 50 and the (1+1)th turn of the first wire 50.

[0073] The second wire 60 moves from the outer peripheral side of the first wire 50 to the outer peripheral surface of the winding core 11 in the middle of the 28th turn. Figure 4 As shown, the second wire 60 moves toward the outer peripheral surface of the winding core 11 within a range of 28.0 turns or more and less than 28.5 turns.

[0074] like Figure 3 As shown, the fourth wound portion 74 is located on the second flange portion 31 side relative to the third wound portion 73 in the direction along the central axis X. The fourth wound portion 74 is a portion of the second wire 60 where at least a portion is wound around the outer circumference of the winding core 11. Specifically, the fourth wound portion 74 extends from the middle of the 28th turn to the 30th turn of the second wire 60.

[0075] The 28th turn of the second wire 60 is directly wound around the outer circumferential surface of the winding core 11, between the 28th turn and the 29th turn of the first wire 50, on the ridgeline of the winding core 11 on the upper Y1 side and the left Z2 side. Furthermore, the 29th turn of the second wire 60 is directly wound around the outer circumferential surface of the winding core 11, between the 29th turn and the 30th turn of the first wire 50. Furthermore, the 29th turn of the second wire 60 is directly wound around the outer circumferential surface of the winding core 11, between the 29th turn and the 30th turn of the first wire 50, on the ridgeline of the winding core 11 on the upper Y1 side and the left Z2 side.

[0076] Furthermore, the second wire 60 intersects the 29th turn of the first wire 50 in the 29th turn of the second wire 60. Specifically, the 29th turn of the second wire 60 has a third intersection 83 that intersects the 29th turn of the first wire 50. That is, the turn immediately before the final turn of the second wire 60 has a third intersection 83 that intersects the turn immediately before the final turn of the first wire 50. In other words, the second wire 60 has a third intersection 83 that intersects the first wire 50 in a turn different from the turn having the first intersection 81 and the turn having the second intersection 82.

[0077] When the second wire 60 travels from the first end 61 to the second end 62, the third intersection 83 is located at a position that crosses the first wire 50 from the second flange portion 31 side to the first flange portion 21 side along the direction of the central axis X. Furthermore, the third intersection 83 is located on the outer peripheral surface of the winding core 11, facing the upper direction Y1. In other words, the third intersection 83 is located on the upper direction Y1 side of the winding core 11 relative to the central axis X.

[0078] The 30.0 turns portion of the second wire 60 is directly wound around the outer circumferential surface of the winding core 11 between the 29.0 turns portion and the 30.0 turns portion of the first wire 50. More specifically, the 30.0 turns portion of the second wire 60 is directly wound around the outer circumferential surface of the winding core 11 between the 29.0 turns portion of the second wire 60 and the 30.0 turns portion of the first wire 50. Furthermore, the portion of the 30th turn, the final turn of the second wire 60, that is directly wound around the outer circumferential surface of the winding core 11 is located between the 29th turn of the second wire 60 and the 30th turn of the first wire 50. Furthermore, the 30th turn, the final turn of the second wire 60, is located between the 29th turn of the first wire 50 and the 30th turn of the first wire 50.

[0079] <Regarding the positional relationship of the intersection>

[0080] Here, N is an integer greater than or equal to 3, and a specific turn of the first wire 50 is defined as the Nth turn of the first wire 50. As described above, the first intersection 81 and the second intersection 82 of the second wire 60 intersect with the 15th turn of the first wire 50. Furthermore, the first intersection 81 is the 15th turn, and the second intersection 82 is the 16th turn. Therefore, when N is 15, the first intersection 81 is the Nth turn of the second wire 60. Furthermore, the second intersection 82 is the (N+1)th turn of the second wire 60.

[0081] Furthermore, the 23rd turn of the second wire 60 crosses over the first wire 50 from the first flange portion 21 side to the second flange portion 31 side in the direction along the central axis X at the first crossing portion 91 and the second crossing portion 92 when the second wire 60 travels from the first end 61 to the second end 62. Therefore, the second wire 60 has a portion that crosses over the first wire 50 from the first flange portion 21 side to the second flange portion 31 side in the direction along the central axis X in the turns located later than the first intersection portion 81 and the second intersection portion 82.

[0082] The final turn of the first wire 50 is the 30th turn. Furthermore, the first intersection 81 and the second intersection 82 of the second wire 60 intersect the 15th turn of the first wire 50. Therefore, the final turn of the first wire 50 is the (2×N)th turn. Similarly, the final turn of the second wire 60 is the (2×N)th turn.

[0083] In addition, if Figure 3 As shown, the 15th turn of the second wire 60 is directly wound on the outer circumference of the winding core 11 except for the vicinity of the first intersection 81. Furthermore, as described above, the first intersection 81 is located after approximately 15.75 turns of the 15th turn. Therefore, of the turns of the second wire 60 having the first intersection 81, at least 0.5 turns, specifically at least 0.75 turns, are wound on the outer circumference of the winding core 11.

[0084] Furthermore, the 16th turn of the second wire 60 is directly wound on the outer circumference of the winding core 11, except for the vicinity of the second intersection 82. Furthermore, as described above, the second intersection 82 is located after approximately 16.75 turns of the 16th turn. Therefore, of the turns of the second wire 60 having the second intersection 82, at least 0.5 turns, specifically at least 0.75 turns, are wound on the outer circumference of the winding core 11.

[0085] like Figure 3 As shown, the winding core 11 is divided into three regions in the direction along the central axis X. And, the three regions are set as the first region P1, the second region P2 and the third region P3 in order from the first flange portion 21 side. At this time, the first intersection 81 and the second intersection 82 are located in the second region P2. That is, the first intersection 81 and the second intersection 82 are located in the second region P2 in the center of the three regions. In addition, Figure 3 In FIG. 1 , boundaries between the first region P1 , the second region P2 , and the third region P3 are virtually indicated by two-dot chain lines.

[0086] <About Mode Switching Characteristics>

[0087] The coil component 10 of the first embodiment and the coil component of the comparative example were used as the test objects, and Ssd12 was measured as an indicator related to the mode conversion characteristics. The number of turns of each wire in the coil component of the comparative example was the same as that of the coil component 10 of the first embodiment, which was 30 turns. The coil component of the comparative example had a first winding section, a second winding section, a third winding section, and a fourth winding section. In addition, the coil component of the comparative example had a first intersection, but did not have a second intersection. That is, the second winding section of the coil component of the comparative example was the section from the middle of the 14th turn of the second wire to the middle of the 16th turn. In addition, the third winding section of the coil component of the comparative example was the section from the middle of the 16th turn of the second wire to the middle of the 28th turn. Furthermore, the first and fourth winding sections of the comparative example were wound similarly to the first winding section 71 and the fourth winding section 74 of the coil component 10 of the first embodiment, respectively. The material of the drum-shaped core and the material of the top plate of the coil component of the comparative example were the same as those of the coil component 10 of the first embodiment. That is, the coil component 10 of the first embodiment has a longer length of the portion of the second wire 60 wound around the winding core 11 than the coil component of the comparative example by the amount that the portion is directly wound around the outer circumferential surface of the winding core 11 at the second intersection 82. In other words, the difference in length between the portions of the wires wound around the winding core 11 is shorter in the coil component 10 of the first embodiment than in the coil component of the comparative example.

[0088] During the measurement, the coil component 10 of the first embodiment and the coil component of the comparative example were mounted on a 3-port board based on the OpenAlliance standard. After performing SOLT calibration on each coil component, the Ssd12 of each coil component was measured. The average of 20 measurement results obtained from each coil component was used as the representative value of the measurement results.

[0089] In the coil component 10 of the first embodiment, Ssd12 was -82.2 dB at a measured frequency of 1.6 MHz. Furthermore, in the coil component of the comparative example, Ssd12 was -84.7 dB at a measured frequency of 1.6 MHz. This indicates that the shorter the difference in length between the portions of the wire wound around the winding core 11, the lower the Ssd12 value.

[0090] <Effects of the First Embodiment>

[0091] (1-1) According to the first embodiment, the second wire 60 has a first intersection 81 and a second intersection 82 that intersect with a specific turn of the first wire 50 within the range of two turns of winding. In other words, the second wire 60 has a sufficient portion that is directly wound around the outer peripheral surface of the winding core 11. According to this structure, the difference between the length of the second wire 60 wound around the winding core 11 and the length of the first wire 50 wound around the winding core 11 can be shortened. Therefore, according to the above structure, the difference in DC resistance between the second wire 60 and the first wire 50 can be shortened. As a result, it is possible to suppress adverse effects on the characteristics required as a coil component. Specifically, according to the above structure, by shortening the difference in DC resistance between the second wire 60 and the first wire 50, the value of Ssd12 can be suppressed.

[0092] (1-2) In the first embodiment, of the turns of the second wire 60 having the first intersection 81, at least 0.5 turns are wound around the outer circumference of the winding core 11. Furthermore, of the turns of the second wire 60 having the second intersection 82, at least 0.5 turns are wound around the outer circumference of the winding core 11. That is, the second wire 60 has a total of at least 1.0 turns wound around the outer circumference of the winding core 11 in the second winding portion 72 without sandwiching the first wire 50. This configuration ensures sufficient length for both the second wire 60 wound around the winding core 11 and the first wire 50 wound around the winding core 11. Furthermore, this configuration can suppress winding disturbances of the second wire 60 near the intersections, compared to a configuration in which only one of the first intersection 81 and the second intersection 82 is provided.

[0093] (1-3) In the first embodiment, the second wire 60 runs from the first end 61 to the second end 62. In this case, the first intersection 81 and the second intersection 82 are portions that cross the first wire 50 from the second flange 31 side to the first flange 21 side along the center axis X. Furthermore, in the first embodiment, the second wire 60 has a first crossover portion 91 and a second crossover portion 92. That is, in the turns of the second wire 60 that are later than the first intersection 81 and the second intersection 82, as the second wire 60 runs from the first end 61 to the second end 62, it crosses the first wire 50 from the first flange 21 side to the second flange 31 side along the center axis X. This configuration allows for the balance of stray capacitance between the first intersection 81 and the second intersection 82, and between the first crossover portion 91 and the second crossover portion 92, thereby improving electrical characteristics.

[0094] (1-4) In the first embodiment, the first intersection 81 is the 15th turn of the second wire 60, and the second intersection 82 is the 16th turn of the second wire 60. Furthermore, the first intersection 81 and the second intersection 82 intersect with the 15th turn of the first wire 50. That is, when a specific turn of the first wire 50 is considered the Nth turn of the first wire 50, the first intersection 81 is the Nth turn of the second wire 60, and the second intersection 82 is the (N+1)th turn of the second wire 60. This configuration prevents a significant difference in the number of turns of the first wire 50 and the second wire 60 at these intersections. Consequently, stray capacitance in the first intersection 81 and the second intersection 82 can be suppressed.

[0095] (1-5) In the first embodiment, the first turn of the second wire 60 is located between the first turn and the second turn of the first wire 50. In other words, the second wire 60 is located on the second flange portion 31 side relative to the same turn of the first wire 50 in the direction along the central axis X. Furthermore, at the first intersection 81 and the second intersection 82, as the second wire 60 travels from the first end 61 to the second end 62, it crosses over the first wire 50 from the second flange portion 31 side toward the first flange portion 21 side in the direction along the central axis X. Therefore, in the turns of the second wire 60 located behind the first intersection 81 and the second intersection 82, the second wire 60 is located on the first flange portion 21 side relative to the same turn of the first wire 50 in the direction along the central axis X. Thus, the offset direction of the second wire 60 relative to the first wire 50 is reversed before and after the first intersection 81 and the second intersection 82. Thus, for the coil component 10 as a whole, stray capacitance in turns preceding the first intersection 81 and the second intersection 82 can be used to cancel at least a portion of stray capacitance in turns following the first intersection 81 and the second intersection 82 .

[0096] (1-6) In the first embodiment, the final turn of the first wire 50 is the 30th turn. The final turn of the second wire 60 is the 30th turn. That is, the second wire 60 intersects the first wire 50 at the 15th turn, which includes the center of the second wire 60, among the turns wound around the winding core 11. This intersection is located approximately in the center of the total turns, which reduces variations in stray capacitance when viewing the second wire 60 as a whole.

[0097] (1-7) In the first embodiment, when the winding core 11 is divided into three equal regions along the central axis X, the first intersection 81 and the second intersection 82 are located in the central second region P2. This concentration of intersections in the central portion of the winding core 11 makes them easily visually identified. For example, when compared to a coil component without an intersection, the coil component 10 of the first embodiment can be distinguished by visually identifying the second region P2.

[0098] (Regarding the Second Embodiment)

[0099] The following describes a second embodiment of a coil component. In the coil component 10 of the second embodiment, the drum-shaped core 10C, plate-shaped core 10F, and first to fourth external electrodes 41 to 44 have the same structure as in the first embodiment. The following describes the winding configuration of the first wire 50 and second wire 60, which differ from the first embodiment.

[0100] <Regarding the Winding Form of the First and Second Wires>

[0101] like Figure 5 As shown, in the second embodiment, the last turn of the first wire 50 is the 30th turn. In the second embodiment, the last turn of the second wire 60 is the 30th turn.

[0102] The first wire 50 is wound directly around the outer circumference of the winding core 11 without interposing the second wire 60. From the 1st to the 15th turns of the first wire 50, the turns are in contact with each other along the central axis X. Meanwhile, the 15th and 16th turns of the first wire 50 are separated along the central axis X. Furthermore, from the 17th to the 28th turns of the first wire 50, the turns are in contact with each other along the central axis X.

[0103] Furthermore, the 28.0 turns portion of the first wire 50 and the 29.0 turns portion of the first wire 50 are in contact with each other in the direction along the central axis X. Meanwhile, at the ridgeline on the upper side in the direction Y1 and the left side in the direction Z2 of the winding core 11, the 28th and 29th turns of the first wire 50 are separated in the direction along the central axis X. Furthermore, the 30th turn of the first wire 50 is separated from the 29th turn of the first wire 50 in the direction along the central axis X.

[0104] The second wire rod 60 includes a first wound portion 71 , a second wound portion 72 , a third wound portion 73 , and a fourth wound portion 74 .

[0105] The first wound portion 71 is the portion of the second wire 60 that is wound around the outer circumference of the first wire 50 in multiple turns. In the second embodiment, the first wound portion 71 is the portion from the first to the fourteenth turns of the second wire 60. In other words, the first wound portion 71 is the portion of the second wire 60 from the portion that overlaps the outer circumference of the first wire 50 to the portion immediately before being directly wound around the outer circumference of the winding core 11.

[0106] Here, I is a positive integer. Furthermore, the groove formed between two adjacent turns of the wire is referred to as the wire valley. In this case, in the first wound portion 71, the first turn of the second wire 60 is located between the first turn of the first wire 50 and the (1+1)th turn of the first wire 50. Specifically, for example, the first turn of the second wire 60 is located in the valley between the first turn of the first wire 50 and the second turn of the first wire 50.

[0107] The second wire 60 moves from the outer peripheral side of the first wire 50 to the outer peripheral surface of the winding core 11 in the middle of the 14th turn. Figure 6 As shown, the second wire 60 moves toward the outer peripheral surface of the winding core 11 within a range of 14.0 turns or more and less than 14.5 turns.

[0108] like Figure 5 As shown, the second winding portion 72 is located on the second flange portion 31 side relative to the first winding portion 71 in the direction along the central axis X. The second winding portion 72 is a portion of the second wire 60 where at least a portion is wound around the outer circumference of the winding core 11. Specifically, the second winding portion 72 is a portion from the middle of the 14th turn to the middle of the 17th turn of the second wire 60.

[0109] The 14th turn of the second wire 60 is directly wound around the outer circumferential surface of the winding core 11, between the 15th turn of the second wire 60 and the 16th turn of the first wire 50, on the ridgeline of the winding core 11 on the upper side in the Y1 direction and the left side in the Z2 direction. Furthermore, the 15th and 16th turn portions of the second wire 60 are directly wound around the outer circumferential surface of the winding core 11, between the 15th and 16th turn portions of the first wire 50.

[0110] Furthermore, the second wire 60 crosses the 15th turn of the first wire 50 in the 14th and 15th turns of the second wire 60. The "crossing" here is the same as the "crossing" in the first embodiment.

[0111] Specifically, the 14th turn of the second wire 60 has a first intersection 81 intersecting the 15th turn of the first wire 50 . Furthermore, the 15th turn of the second wire 60 has a second intersection 82 intersecting the 15th turn of the first wire 50 .

[0112] That is, in the second winding portion 72, when the second wire 60 advances from the first end 61 to the second end 62, the second wire 60 has a first intersection portion 81 and a second intersection portion 82 that intersect with a specific one turn of the first wire 50 within the range of two turns of winding. In addition, in this embodiment, when viewed in a direction perpendicular to the central axis X of the winding core 11, the portion where the center lines of the wires overlap is also referred to as the "intersection portion."

[0113] The first intersection 81 is a portion where the second wire 60 crosses over the first wire 50 from the second flange portion 31 side to the first flange portion 21 side in the direction along the central axis X when the second wire 60 travels from the first end 61 to the second end 62. Similarly, the second intersection 82 is a portion where the second wire 50 crosses over from the second flange portion 31 side to the first flange portion 21 side in the direction along the central axis X.

[0114] The first intersection 81 and the second intersection 82 are located on the outer circumference of the winding core 11, facing in the upward direction Y1. In other words, the first intersection 81 and the second intersection 82 are located on the outer circumference of the winding core 11, on the upward direction Y1 side relative to the central axis X. Therefore, the first intersection 81 is located approximately 14.75 turns later in the 14th turn. Similarly, the second intersection 82 is located approximately 15.75 turns later in the 15th turn.

[0115] The 17.0 turns of the second wire 60 are directly wound around the outer peripheral surface of the winding core 11 between the 16.0 turns and the 17.0 turns of the first wire 50. In addition, the second wire 60 is lapped from the outer peripheral surface of the winding core 11 to the outer peripheral side of the first wire 50 in the middle of the 17th turn. Specifically, Figure 6 As shown in FIG. 1 , the second wire 60 is placed on the outer periphery of the first wire 50 within a range of 17.0 turns or more and less than 17.5 turns. Figure 5 As shown, the portion of the 17th turn of the second wire 60 that overlaps the outer periphery of the first wire 50 is the valley portion between the 16th turn of the first wire 50 and the 16th turn of the second wire 60 .

[0116] The third wound portion 73 in the second embodiment has the same structure as the third wound portion 73 in the first embodiment. Specifically, the 23rd turn of the second wire 60 has a first spanning portion 91 that spans the 22nd turn of the first wire 50. Furthermore, the 23rd turn of the second wire 60 has a second spanning portion 92 that spans the 23rd turn of the first wire 50.

[0117] The fourth wound portion 74 in the second embodiment has the same structure as the fourth wound portion 74 in the first embodiment. Specifically, the 29th turn of the second wire 60 has a third intersection 83 that intersects the 29th turn of the first wire 50. The third intersection 83 is a portion of the second wire 60 that intersects with the previous turn of the first wire 50, in the turn preceding the final turn. Furthermore, the portion of the 30th turn of the second wire 60 that is directly wound around the outer circumferential surface of the winding core 11 is located between the 29th turn of the second wire 60 and the 30th turn of the first wire 50. Furthermore, the 30th turn of the second wire 60 that is the final turn is located between the 29th turn preceding the final turn and the 30th turn of the first wire 50, in the final turn.

[0118] <Regarding the positional relationship of the intersection>

[0119] Here, N is an integer greater than or equal to 3, and a specific turn of the first wire 50 is defined as the Nth turn of the first wire 50. As described above, the first intersection 81 and the second intersection 82 of the second wire 60 intersect with the 15th turn of the first wire 50. Furthermore, the first intersection 81 is the 14th turn, and the second intersection 82 is the 15th turn. Therefore, when N is 15, the first intersection 81 is the (N-1)th turn of the second wire 60. Furthermore, the second intersection 82 is the Nth turn of the second wire 60.

[0120] Furthermore, the 23rd turn of the second wire 60 crosses over the first wire 50 from the first flange portion 21 side to the second flange portion 31 side in the direction along the central axis X at the first crossing portion 91 and the second crossing portion 92 when the second wire 60 travels from the first end 61 to the second end 62. Therefore, the second wire 60 has a portion that crosses over the first wire 50 from the first flange portion 21 side to the second flange portion 31 side in the direction along the central axis X in the turns located later than the first intersection portion 81 and the second intersection portion 82.

[0121] The final turn of the first wire 50 is the 30th turn. Furthermore, the first intersection 81 and the second intersection 82 of the second wire 60 intersect the 15th turn of the first wire 50. Therefore, the final turn of the first wire 50 is the (2×N)th turn. Similarly, the final turn of the second wire 60 is the (2×N)th turn.

[0122] As described above, the turn immediately before the final turn of the second wire 60 has the third intersection 83 intersecting with the turn immediately before the final turn of the first wire 50. That is, in the second embodiment, the turn immediately before the (2×N)th turn of the second wire 60 has the third intersection 83 intersecting with the turn immediately before the (2×N)th turn of the first wire 50.

[0123] Furthermore, the 14th turn of the second wire 60 is directly wound on the outer circumference of the winding core 11, except for the vicinity of the first intersection 81 and the vicinity of the 14.0 turn. Furthermore, as described above, the first intersection 81 is located after the approximately 14.75 turn of the 14th turn. Therefore, of the turns of the second wire 60 having the first intersection 81, at least 0.5 turns are wound on the outer circumference of the winding core 11.

[0124] Furthermore, the 15th turn of the second wire 60 is directly wound on the outer circumference of the winding core 11, except for the vicinity of the second intersection 82. Furthermore, as described above, the second intersection 82 is located after approximately 15.75 turns of the 15th turn. Therefore, of the turns of the second wire 60 having the second intersection 82, at least 0.5 turns are wound on the outer circumference of the winding core 11.

[0125] like Figure 5 As shown, the winding core 11 is divided into three regions in the direction along the central axis X. Furthermore, the three regions are sequentially designated as the first region P1, the second region P2, and the third region P3 from the first flange 21 side. At this time, the first intersection 81 and the second intersection 82 are located in the second region P2. That is, the first intersection 81 and the second intersection 82 are located in the second region P2 in the center of the three regions. In addition, Figure 5 In FIG. 1 , boundaries between the first region P1 , the second region P2 , and the third region P3 are virtually indicated by two-dot chain lines.

[0126] <Effects of the Second Embodiment>

[0127] In the second embodiment, in addition to the same effects as the effects (1-1) to (1-3) and (1-5) to (1-7) of the first embodiment, the following effects can be obtained.

[0128] (2-1) In the second embodiment, the first intersection 81 is the 14th turn of the second wire 60, and the second intersection 82 is the 15th turn of the second wire 60. Furthermore, the first intersection 81 and the second intersection 82 intersect with the 15th turn of the first wire 50. That is, assuming that a specific turn of the first wire 50 is the Nth turn of the first wire 50, the first intersection 81 is the (N-1)th turn of the second wire 60, and the second intersection 82 is the Nth turn of the second wire 60. This configuration prevents a significant difference in the number of turns of the first wire 50 and the second wire 60 at these intersections. Consequently, stray capacitance in the first intersection 81 and the second intersection 82 can be suppressed.

[0129] (2-2) In the second embodiment, the third intersection portion 83 is a portion that intersects with the previous turn of the (2×N)th turn of the first wire 50 in the previous turn of the (2×N)th turn of the second wire 60. That is, the third intersection portion 83 is located on the second flange portion 31 side relative to the first intersection portion 81 and the second intersection portion 82. In addition, the first intersection portion 81 is located on the first flange portion 21 side relative to the 15th turn including the center of the second wire. The third intersection portion 83 is located on the second flange portion 31 side relative to the 15th turn including the center of the second wire 60. Therefore, according to the above structure, when the coil component 10 is viewed as a whole, the deviation of the stray capacitance of the coil component 10 can be suppressed.

[0130] (Regarding the third embodiment)

[0131] The following describes a third embodiment of a coil component. In the coil component 10 of the third embodiment, the drum-shaped core 10C, plate-shaped core 10F, and first to fourth external electrodes 41 to 44 have the same structure as in the first embodiment. The following describes the winding configuration of the first wire 50 and second wire 60, which differ from the first and second embodiments.

[0132] <Regarding the Winding Form of the First and Second Wires>

[0133] like Figure 7 As shown, in the third embodiment, the last turn of the first wire 50 is the 28th turn. In the third embodiment, the last turn of the second wire 60 is the 28th turn.

[0134] The first wire 50 is wound directly around the outer circumference of the winding core 11 without interposing the second wire 60. From the 1st to the 15th turns of the first wire 50, the turns are in contact with each other along the central axis X. Meanwhile, the 15th and 16th turns of the first wire 50 are separated along the central axis X. Furthermore, from the 17th to the 28th turns of the first wire 50, the turns are in contact with each other along the central axis X.

[0135] The second wire rod 60 includes a first wound portion 71 , a second wound portion 72 , and a third wound portion 73 .

[0136] The first wound portion 71 is the portion of the second wire 60 that is wound around the outer circumference of the first wire 50 in multiple turns. In the third embodiment, the first wound portion 71 is the portion from the second turn to the fourteenth turn of the second wire 60. In other words, the first wound portion 71 is the portion of the second wire 60 from the portion that overlaps the outer circumference of the first wire 50 to the portion immediately before being directly wound around the outer circumference of the winding core 11.

[0137] Here, I is a positive integer. Furthermore, the groove formed between two adjacent turns of the wire is referred to as the wire valley. In this case, in the first wound portion 71, the first turn of the second wire 60 is located between the (I-1)th turn of the first wire 50 and the first turn of the first wire 50. Specifically, for example, the second turn of the second wire 60 is located in the valley between the first turn of the first wire 50 and the second turn of the first wire 50.

[0138] The second wire 60 moves from the outer periphery of the first wire 50 to the outer periphery of the winding core 11 during the 14th turn. Specifically, the second wire 60 moves to the outer periphery of the winding core 11 within a range of 14.0 turns or more and less than 14.5 turns.

[0139] Furthermore, when the second wire 60 travels from the first end 61 to the second end 62 , the 14th turn of the second wire 60 crosses the 14th turn of the first wire 50 from the first flange 21 side to the second flange 31 side on the surface of the winding core 11 facing the downward direction Y2 .

[0140] The second wound portion 72 is located on the second flange portion 31 side relative to the first wound portion 71 in the direction along the central axis X. The second wound portion 72 is a portion of the second wire 60 at least partially wound around the outer circumference of the winding core 11. Specifically, the second wound portion 72 extends from the middle of the 14th turn to the middle of the 16th turn of the second wire 60.

[0141] The 14th turn of the second wire 60 is directly wound around the outer circumferential surface of the winding core 11, between the 15th and 16th turns of the first wire 50, on the ridgeline of the winding core 11 on the upper side in the Y1 direction and the left side in the Z2 direction. Furthermore, the 15th and 16th turns of the second wire 60 are directly wound around the outer circumferential surface of the winding core 11, between the 15th and 16th turns of the first wire 50.

[0142] Furthermore, the second wire 60 crosses the 15th turn of the first wire 50 at the 14th and 15th turns of the second wire 60. The "crossing" here is the same as the "crossing" in the first embodiment.

[0143] Specifically, the 14th turn of the second wire 60 has a first intersection 81 intersecting the 15th turn of the first wire 50 . Furthermore, the 15th turn of the second wire 60 has a second intersection 82 intersecting the 15th turn of the first wire 50 .

[0144] That is, in the second winding portion 72, when the second wire 60 advances from the first end 61 to the second end 62, the second wire 60 has a first intersection portion 81 and a second intersection portion 82 that intersect with a specific one turn of the first wire 50 within the range of two turns of winding. In addition, in this embodiment, when viewed in a direction perpendicular to the central axis X of the winding core 11, the portion where the center lines of the wires overlap is also referred to as the "intersection portion."

[0145] The first intersection 81 is a portion where the second wire 60 crosses over the first wire 50 from the second flange portion 31 side to the first flange portion 21 side in the direction along the central axis X when the second wire 60 travels from the first end 61 to the second end 62. Similarly, the second intersection 82 is a portion where the second wire 50 crosses over from the second flange portion 31 side to the first flange portion 21 side in the direction along the central axis X.

[0146] The first intersection 81 and the second intersection 82 are located on the outer circumference of the winding core 11, facing in the upward direction Y1. In other words, the first intersection 81 and the second intersection 82 are located on the outer circumference of the winding core 11, on the upward direction Y1 side relative to the central axis X. That is, the first intersection 81 is located approximately 14.75 turns later in the 14th turn. Similarly, the second intersection 82 is located approximately 15.75 turns later in the 15th turn.

[0147] The second wire 60 is placed from the outer peripheral surface of the winding core 11 to the outer peripheral side of the first wire 50 in the middle of the 16th turn. Figure 8 As shown, the second wire 60 is overlapped toward the outer peripheral side of the winding core 11 within a range of 16.0 turns or more and less than 16.5 turns.

[0148] In addition, if Figure 7 As shown, when the second wire 60 travels from the first end 61 to the second end 62, the 16th turn of the second wire 60 crosses the 16th turn of the first wire 50 from the first flange portion 21 side to the second flange portion 31 side on the surface of the winding core portion 11 facing the downward direction Y2.

[0149] The third wound portion 73 is located on the second flange portion 31 side relative to the second wound portion 72 in the direction along the central axis X. The third wound portion 73 is the portion of the second wire 60 where multiple turns are wound around the outer periphery of the first wire 50. In the third embodiment, the third wound portion 73 is the portion from midway through the 16th turn of the second wire 60 to the 27th turn. In other words, the third wound portion 73 is the portion of the second wire 60 from the portion that overlaps the outer periphery of the first wire 50 to the portion immediately before being directly wound around the outer periphery of the winding core 11.

[0150] The 16th turn of the second wire 60 is located in the valley between the 16th turn of the first wire 50 and the 17th turn of the first wire 50 on the ridgeline on the upper side in the Y1 direction and the left side in the Z2 direction of the winding core 11. Furthermore, from the 17th turn of the second wire 60 to the 27th turn of the second wire 60, the 1st turn of the second wire 60 is located in the valley between the 1st turn of the first wire 50 and the (1+1)th turn of the first wire 50.

[0151] Furthermore, the second wire rod 60 includes a fourth wound portion 74 and a fifth wound portion 75 .

[0152] The fourth wound portion 74 is located on the first flange portion 21 side relative to the first wound portion 71 in the direction along the central axis X. The fourth wound portion 74 is the first turn of the second wire 60. The first turn of the second wire 60 is located on the first flange portion 21 side relative to the first turn of the first wire 50 in the direction along the central axis X.

[0153] The fifth wound portion 75 is located on the second flange portion 31 side relative to the third wound portion 73 in the direction along the central axis X. The fifth wound portion 75 is the 28th turn of the second wire 60. The 28th turn of the second wire 60 is located on the second flange portion 31 side relative to the 28th turn of the first wire 50 in the direction along the central axis X.

[0154] <Regarding the positional relationship of the intersection>

[0155] Here, N is an integer greater than or equal to 3, and a specific turn of the first wire 50 is defined as the Nth turn of the first wire 50. As described above, the first intersection 81 and the second intersection 82 of the second wire 60 intersect with the 15th turn of the first wire 50. Furthermore, the first intersection 81 is the 14th turn, and the second intersection 82 is the 15th turn. Therefore, when N is 15, the first intersection 81 is the (N-1)th turn of the second wire 60. Furthermore, the second intersection 82 is the Nth turn of the second wire 60.

[0156] As described above, in the first wound portion 71, the first turn of the second wire 60 is located in the valley between the (I-1)th turn of the first wire 50 and the first turn of the first wire 50. Specifically, the 13th turn of the second wire 60 is located in the valley between the 12th and 13th turns of the first wire 50. In other words, the (N-2)th turn of the second wire 60 is located between the (N-3)th and (N-2)th turns of the first wire 50 and is wound on the outer circumference of the first wire 50.

[0157] Furthermore, as described above, from the 17th turn of the second wire 60 to the 27th turn of the second wire 60, the 1st turn of the second wire 60 is located in the valley between the 1st turn of the first wire 50 and the (1+1)th turn of the first wire 50. That is, the 17th turn of the second wire 60 is located in the valley between the 17th and 18th turns of the first wire 50. In other words, the (N+2)th turn of the second wire 60 is located between the (N+2)th and (N+3)th turns of the first wire 50 and is wound on the outer circumference of the first wire 50.

[0158] The final turn of the second wire 60 is located on the second flange portion 31 side in the direction along the central axis X relative to the final turn of the first wire 50 .

[0159] Furthermore, the 14th turn of the second wire 60 is wound directly onto the outer circumference of the winding core 11, except for the vicinity of the first intersection 81 and the vicinity of the 14.0 turn. Furthermore, as described above, the first intersection 81 is located after the 14.75 turn of the 14th turn. Therefore, of the turns of the second wire 60 having the first intersection 81, at least 0.5 turns are wound onto the outer circumference of the winding core 11.

[0160] Furthermore, the 15th turn of the second wire 60 is directly wound around the outer circumference of the winding core 11, except for the vicinity of the second intersection 82. Furthermore, as described above, the second intersection 82 is located after approximately 15.75 turns of the 15th turn. Therefore, of the turns of the second wire 60 having the second intersection 82, at least 0.5 turns are wound around the outer circumference of the winding core 11.

[0161] like Figure 7 As shown, the winding core 11 is divided into three regions in the direction along the central axis X. Furthermore, the three regions are sequentially designated as the first region P1, the second region P2, and the third region P3 from the first flange 21 side. At this time, the first intersection 81 and the second intersection 82 are located in the second region P2. That is, the first intersection 81 and the second intersection 82 are located in the second region P2 in the center of the three regions. In addition, Figure 7 In FIG. 1 , boundaries between the first region P1 , the second region P2 , and the third region P3 are virtually indicated by two-dot chain lines.

[0162] <Effects of the Third Embodiment>

[0163] In the third embodiment, in addition to the same effects as the effects (1-1), (1-2), (1-5), and (1-6) of the first embodiment and the effect (2-1) of the second embodiment, the following effects can be obtained.

[0164] (3-1) In the third embodiment, the (N-2)th turn of the second wire 60 is wound around the outer circumference of the first wire 50, between the (N-3)th and (N-2)th turns of the first wire 50. The (N+2)th turn of the second wire 60 is wound around the outer circumference of the first wire 50, between the (N+2)th and (N+3)th turns of the first wire 50. This configuration can suppress stray capacitance generated between the different turns of each wire.

[0165] In the third embodiment, in the first wound portion 71, the first turn of the second wire 60 is located in the valley between the (I-1)th turn of the first wire 50 and the first turn of the first wire 50. Furthermore, in the third wound portion 73, the first turn of the second wire 60 is located in the valley between the first turn and the (I+1)th turn of the first wire 50. This configuration allows for suppression of stray capacitance in consecutive turns in the first and third wound portions 71, 73.

[0166] (3-2) In coil component 10, the final turn of each wire is connected to its respective external electrode and is therefore drawn toward second flange portion 31. Therefore, the final turn of each wire is stretched toward second flange portion 31. Consequently, there is a possibility that the vicinity of the final turn of each wire may shift in the direction toward second flange portion 31. In particular, if the first wire 50 shifts in the direction toward second flange portion 31, the second wire 60 wound around the outer periphery of the first wire 50 may also shift, potentially causing overall winding disorder of the wires.

[0167] In the third embodiment, the final turn of the second wire 60 is located closer to the second flange portion 31 than the final turn of the first wire 50 in the direction along the central axis X. Due to this positional relationship, even if the final turn of the first wire 50 is pulled toward the second flange portion 31, the final turn of the second wire 60 can limit movement in the pulling direction. Therefore, according to this structure, the overall winding disorder of the wire can be suppressed as described above.

[0168] <Change Example>

[0169] The above-mentioned embodiment can be implemented by modification as follows: The above-mentioned first embodiment, second embodiment, third embodiment and the following modification examples can be implemented in combination within the scope of no technical contradiction.

[0170] In the first, second, and third embodiments, the structure of the coil component 10 is not limited to the above-described structure. For example, the coil component 10 may not include the plate-shaped core 10F. Furthermore, the shape of the plate-shaped core 10F is not limited to a rectangular plate. For example, the plate-shaped core 10F may also be an elliptical plate.

[0171] In the first, second, and third embodiments, the shape of the winding core 11 is not limited to the examples in the above embodiments. For example, the shape of the winding core 11 may be cylindrical or a polygonal prism other than a quadrangular prism.

[0172] In the first, second, and third embodiments, the materials of the drum-shaped core 10C and the plate-shaped core 10F are not limited to those in the aforementioned embodiments. For example, the materials of the drum-shaped core 10C and the plate-shaped core 10F are not limited to Ni-Zn ferrites but may also be Mn-Zn ferrites. Furthermore, the materials of the drum-shaped core 10C and the plate-shaped core 10F may also be ferrites, alumina, synthetic resins, or mixtures thereof.

[0173] In the first, second, and third embodiments, the structure of the drum-shaped core 10C is not limited to the examples in the aforementioned embodiments. For example, the first flange portion 21 may not include the protrusion 23. Alternatively, for example, the first flange portion 21 may be shaped so as to be concave in the center along the left-right axis Z and bifurcated. This also applies to the second flange portion 31.

[0174] In the first, second, and third embodiments, the method for joining the joint portion EP of each external electrode to each wire is not limited to thermocompression. For example, the ends of each wire may be joined to the joint portion EP by laser or by other methods.

[0175] In the first, second, and third embodiments, the materials and shapes of the external electrodes are not limited to those in the aforementioned embodiments. Each external electrode may be bonded to the first wire 50 and the second wire 60. For example, the external electrode may include a metal layer and a plating layer, with the wires connected to the plating layer. Furthermore, for example, each external electrode may not include an adhesive portion AP and a connecting portion BP. In this case, the external electrode may be secured to the corresponding flange portion via the bonding portion EP, the mounting portion CP, the extension portion DP, or any combination thereof.

[0176] In the first, second, and third embodiments, each external electrode is not limited to a plate shape. For example, each external electrode may be a coated electrode formed by applying an electrode paste to the first flange portion 21 or the second flange portion 31, sintering it, or plating it.

[0177] In the first embodiment, the second embodiment, and the third embodiment, the value of N is not limited to 15. The value of N may be an integer greater than or equal to 3.

[0178] In the first, second, and third embodiments, the first intersection 81 and the second intersection 82 may not be located in the second region P2. In addition, the first intersection 81 and the second intersection 82 may not be located in the same region.

[0179] In the first embodiment, the first intersection 81 is not limited to the intersection of the 15th turn of the first wire 50 and the 15th turn of the second wire 60. For example, the first intersection 81 may also be the intersection of the 14th turn of the first wire 50 and the 16th turn of the second wire 60. Thus, the second wire 60 at the first intersection 81 may be separated from the Nth turn of the first wire 50 by two or more turns. This point also applies to the second and third embodiments.

[0180] In the first and second embodiments, the second wire 60 does not need to intersect the first wire 50 at the center of the turns wound around the winding core 11. That is, when the first intersection 81 is the Nth turn of the second wire 60, the final turn of the second wire 60 does not need to be the (2×N)th turn. This also applies to the first wire 50. Furthermore, when the second intersection 82 is the Nth turn of the second wire 60, the final turn of the second wire 60 does not need to be the (2×N)th turn.

[0181] In the first and second embodiments, the first turn of the second wire 60 may be directly wound around the outer peripheral surface of the winding core 11 without sandwiching the first wire 50. That is, the first turn of the second wire 60 may not be located in the valley formed by two adjacent turns of the first wire 50.

[0182] In the first and second embodiments, the first turn of the second wire 60 may not be located between the first turn of the first wire 50 and the second turn of the first wire 50. Furthermore, in the third embodiment, the first turn of the second wire 60 may not be located on the first flange portion 21 side relative to the first turn of the first wire 50 in the direction along the central axis X.

[0183] In the first and second embodiments, the final turn of the second wire 60 may not be located on the first flange portion 21 side relative to the final turn of the first wire 50 in the direction along the central axis X. Furthermore, in the third embodiment, the final turn of the second wire 60 may not be located on the second flange portion 31 side relative to the final turn of the first wire 50 in the direction along the central axis X.

[0184] In the first and second embodiments, the first spanning portion 91 and the second spanning portion 92 may not be located on the second flange portion 31 side relative to the second intersection portion 82 in the direction along the central axis X when the second wire 60 runs from the first end 61 to the second end 62. That is, the second wire 60 may have a portion in a turn preceding the first intersection portion 81 and the second intersection portion 82 that spans the first wire 50 from the first flange portion 21 side to the second flange portion 31 side in the direction along the central axis X when the second wire 60 runs from the first end 61 to the second end 62. Furthermore, in the first and second embodiments, the first spanning portion 91 and the second spanning portion 92 may be located on different turns of the second wire 60.

[0185] In the first, second, and third embodiments, the first intersection 81 and the second intersection 82 may cross the first wire 50 from the first flange 21 side to the second flange 31 side in the direction along the central axis X when the second wire 60 travels from the first end 61 to the second end 62.

[0186] In the first, second, and third embodiments, the portion of the second wire 60 wound around the outer circumference of the winding core 11 may be less than 0.5 turns among the turns having the first intersection 81. Furthermore, the portion of the second wire 60 wound around the outer circumference of the winding core 11 may be less than 0.5 turns among the turns having the second intersection 82. In each embodiment, when the second wire 60 travels from the first end to the second end in the second winding portion 72, the second wire 60 only needs to have the first intersection 81 and the second intersection 82 within the range of two turns.

[0187] In the first and second embodiments, the third intersection 83 may not be located on the second flange portion 31 side relative to the second intersection 82 in the direction along the central axis X when the second wire 60 runs from the first end 61 to the second end 62. That is, the second wire 60 may have a portion in a turn preceding the first intersection 81 and the second intersection 82 that crosses the first wire 50 from the first flange portion 21 side to the second flange portion 31 side in the direction along the central axis X when the second wire 60 runs from the first end 61 to the second end 62.

[0188] In the first and second embodiments, the third intersection 83 may be located in a different turn of the second wire 60. For example, the third intersection 83 may be located at a point where the (2×N)th turn of the second wire 60 intersects with the (2×N)th turn of the first wire 50.

[0189] In the first and second embodiments, the third intersection portion 83 may not be located on the upper direction Y1 side of the winding core 11 relative to the central axis X. Consequently, the third intersection portion 83 may be located on the outer peripheral surface of the winding core 11 in a direction different from the direction in which the external electrodes are provided in the flange portions.

[0190] In the first and second embodiments, the second wire 60 may not have the first crossing portion 91, the second intersection portion 82, and the third intersection portion 83. Furthermore, in the third embodiment, the 14th turn of the second wire 60 may not cross over the 14th turn of the first wire 50. Furthermore, in the third embodiment, the 16th turn of the second wire 60 may not cross over the 16th turn of the first wire 50. That is, in each embodiment, as long as the second wire 60 has the first intersection portion 81 and the second intersection portion 82, the winding configuration of each wire can be appropriately modified. For example, in the first, second, and third embodiments, the second wire 60 may further have intersections and crossing portions.

[0191] Furthermore, for example, in the third embodiment, the (N-2)th turn of the second wire 60 may not be between the (N-3)th turn of the first wire 50 and the (N-2)th turn of the first wire 50, but may be wound on the outer circumference of the first wire 50. Furthermore, the (N+2)th turn of the second wire 60 may not be between the (N+2)th turn and the (N+3)th turn of the first wire 50, but may be wound on the outer circumference of the first wire 50.

[0192] <Note>

[0193] The following describes technical ideas derived from the above-mentioned embodiment and modified examples.

[0194] [1] A coil component comprising: a drum-shaped core having a columnar winding core portion, a first flange portion provided at a first end of the winding core portion in a direction along a central axis thereof, and a second flange portion provided at a second end of the winding core portion opposite to the first end thereof; a first external electrode and a second external electrode provided on the first flange portion; a third external electrode and a fourth external electrode provided on the second flange portion; a first wire rod wound on the winding core portion, a first end of the first wire rod being connected to the first external electrode, and a second end of the first wire rod being connected to the third external electrode; and a second wire rod wound on the winding core portion in the same direction as the first wire rod, a first end of the second wire rod being connected to the second external electrode, and a second end of the second wire rod being connected to the first external electrode. Four external electrodes are connected, and the above-mentioned second wire rod comprises: a first winding portion, in which multiple turns of the above-mentioned first winding portion are wound on the outer peripheral side relative to the above-mentioned first wire rod; a second winding portion, which is located on the second flange portion side relative to the above-mentioned first winding portion in the direction along the above-mentioned central axis, and at least a portion of the above-mentioned second winding portion is wound on the outer peripheral surface of the above-mentioned winding core portion; and a third winding portion, which is located on the second flange portion side relative to the above-mentioned second winding portion in the direction along the above-mentioned central axis, and multiple turns of the above-mentioned third winding portion are wound on the outer peripheral side relative to the above-mentioned first wire rod. When the above-mentioned second wire rod travels from the above-mentioned first end to the above-mentioned second end in the above-mentioned second winding portion, the above-mentioned second wire rod has a first intersection portion and a second intersection portion that intersect with a specific one turn of the above-mentioned first wire rod within the range of winding two turns.

[0195] [2] The coil component according to [1], wherein:

[0196] Among the turns having the first intersection, at least 0.5 turns of the second wire are wound around the outer peripheral surface of the winding core, and among the turns having the second intersection, at least 0.5 turns of the second wire are wound around the outer peripheral surface of the winding core.

[0197] [3] The coil component according to [1] or [2], wherein:

[0198] The first intersection portion and the second intersection portion are portions where the second wire rod crosses over the first wire rod from the second flange portion side to the first flange portion side in the direction along the center axis when the second wire rod travels from the first end to the second end. The second wire rod has a portion in the turns later than the first intersection portion and the second intersection portion where the second wire rod crosses over the first wire rod from the first flange portion side to the second flange portion side in the direction along the center axis when the second wire rod travels from the first end to the second end.

[0199] [4] The coil component according to any one of [1] to [3], wherein:

[0200] When N is an integer greater than or equal to 3 and a specific turn of the first wire is the Nth turn of the first wire, the first intersection is the Nth turn of the second wire, and the second intersection is the (N+1)th turn of the second wire.

[0201] [5] The coil component according to any one of [1] to [3], wherein:

[0202] When N is an integer greater than or equal to 3 and a specific turn of the first wire is the Nth turn of the first wire, the first intersection is the (N-1)th turn of the second wire, and the second intersection is the Nth turn of the second wire.

[0203] [6] The coil component according to any one of [1] to [5], wherein:

[0204] The first turn of the second wire is located between the first turn of the first wire and the second turn of the first wire.

[0205] [7] The coil component according to any one of [1] to [6], wherein:

[0206] The last turn of the second wire rod is located closer to the second flange portion than the last turn of the first wire rod in the direction along the central axis.

[0207] [8] The coil component according to [4] or [5], wherein:

[0208] The last turn in the first wire rod is the (2×N)th turn, and the last turn in the second wire rod is the (2×N)th turn.

[0209] [9] The coil component according to [5], wherein:

[0210] The (N-2)th turn of the second wire is wound on the outer circumference of the first wire between the (N-3)th and (N-2)th turns of the first wire, and the (N+2)th turn of the second wire is wound on the outer circumference of the first wire between the (N+2)th and (N+3)th turns of the first wire.

[0211]

[10] The coil component according to [8], wherein:

[0212] The turn preceding the (2×N)th turn of the second wire has a third intersection portion intersecting with the turn preceding the (2×N)th turn of the first wire.

[0213]

[11] The coil component according to [8], wherein:

[0214] The (2×N)th turn of the second wire rod has a third intersection portion intersecting with the (2×N)th turn of the first wire rod.

[0215]

[12] The coil component according to any one of [1] to

[11] , wherein:

[0216] The above-mentioned second wire has a third intersection portion that intersects with the above-mentioned first wire in a turn different from the turn having the above-mentioned first intersection portion and the turn having the above-mentioned second intersection portion. When a specific axis orthogonal to the above-mentioned central axis is set as an upper and lower axis, and one of the directions along the above-mentioned upper and lower axes is set as an upper direction, the above-mentioned first external electrode and the above-mentioned second external electrode are located on the above-mentioned upper direction side of the above-mentioned first flange portion relative to the above-mentioned central axis, the above-mentioned third external electrode and the above-mentioned fourth external electrode are located on the above-mentioned upper direction side of the above-mentioned second flange portion relative to the above-mentioned central axis, and the above-mentioned third intersection portion is located on the above-mentioned upper direction side of the above-mentioned winding core portion relative to the above-mentioned central axis.

[0217]

[13] The coil component according to any one of [1] to

[12] , wherein:

[0218] When the winding core is divided into three regions in a direction along the central axis, the first intersection portion and the second intersection portion are located in the central region.

Claims

1. A coil component, wherein: have: a drum-shaped core having a columnar winding core portion, a first flange portion provided at a first end of the winding core portion in a direction along a central axis thereof, and a second flange portion provided at a second end of the winding core portion opposite to the first end thereof; A first external electrode and a second external electrode are provided on the first flange portion; a third external electrode and a fourth external electrode, provided on the second flange portion; a first wire material wound on the winding core, wherein a first end of the first wire material is connected to the first external electrode, and a second end of the first wire material is connected to the third external electrode; as well as A second wire is wound around the winding core in the same direction as the first wire, a first end of the second wire is connected to the second external electrode, and a second end of the second wire is connected to the fourth external electrode. The second wire material comprises: a first winding portion, wherein a plurality of turns of the first winding portion are wound on an outer circumference of the first wire; a second winding portion located on the second flange portion side relative to the first winding portion in a direction along the central axis, and at least a portion of the second winding portion being wound around an outer peripheral surface of the winding core portion; as well as The third winding portion is located on the second flange portion side relative to the second winding portion in the direction along the central axis, and the multiple turns of the third winding portion are wound on the outer circumference side relative to the first wire rod. When the second wire runs from the first end to the second end in the second winding portion, the second wire has a first intersection and a second intersection within a range of two winding turns that intersect with a specific turn of the first wire.

2. The coil component according to claim 1, wherein Among the turns having the first intersection, 0.5 or more turns of the second wire are wound around the outer circumference of the winding core, and among the turns having the second intersection, 0.5 or more turns of the second wire are wound around the outer circumference of the winding core.

3. The coil component according to claim 1 or 2, wherein The first intersection portion and the second intersection portion are portions where the second wire rod crosses the first wire rod from the second flange portion side to the first flange portion side in the direction along the central axis when the second wire rod travels from the first end to the second end. The second wire has a portion in a turn located after the first intersection and the second intersection that crosses over the first wire from the first flange portion side to the second flange portion side in a direction along the central axis when the second wire runs from the first end to the second end.

4. The coil component according to any one of claims 1 to 3, wherein When N is an integer greater than or equal to 3, and a specific turn of the first wire is set as the Nth turn of the first wire, The first intersection is the Nth turn of the second wire, The second intersection is the (N+1)th turn of the second wire.

5. The coil component according to any one of claims 1 to 3, wherein When N is an integer greater than or equal to 3, and a specific turn of the first wire is set as the Nth turn of the first wire, The first intersection is the N-1th turn of the second wire. The second intersection is the Nth turn of the second wire.

6. The coil component according to any one of claims 1 to 5, wherein The first turn of the second wire is located between the first turn of the first wire and the second turn of the first wire.

7. The coil component according to any one of claims 1 to 6, wherein: The final turn of the second wire rod is located closer to the second flange portion in a direction along the central axis than the final turn of the first wire rod.

8. The coil component according to claim 4 or 5, wherein The final turn in the first wire is the 2×Nth turn, The final turn in the second wire is the 2×Nth turn.

9. The coil component according to claim 5, wherein The N-2nd turn of the second wire is wound on the outer circumference of the first wire between the N-3rd turn and the N-2nd turn of the first wire. The (N+2)th turn of the second wire is wound on the outer circumference of the first wire between the (N+2)th turn and the (N+3)th turn of the first wire.

10. The coil component according to claim 8, wherein The turn preceding the 2×N turns of the second wire has a third intersection portion intersecting with the turn preceding the 2×N turns of the first wire.

11. The coil component according to claim 8, wherein The 2×Nth turn of the second wire has a third intersection portion intersecting with the 2×Nth turn of the first wire.

12. The coil component according to any one of claims 1 to 11, wherein The second wire has a third intersection portion intersecting with the first wire in a turn different from the turn having the first intersection portion and the turn having the second intersection portion. When a specific axis perpendicular to the central axis is defined as a vertical axis and one of the directions along the vertical axis is defined as an upward direction, The first external electrode and the second external electrode are located on the upper side of the first flange portion with respect to the central axis. The third external electrode and the fourth external electrode are located on the upper side of the second flange portion with respect to the central axis. The third intersection portion is located on the upper side of the winding core with respect to the central axis.

13. The coil component according to any one of claims 1 to 12, wherein: When the winding core is divided equally into three regions in a direction along the central axis, the first intersection portion and the second intersection portion are located in the central region.

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