Coil component and manufacturing method thereof

Abstract

To suppress the winding disorder of a coil component.SOLUTION: A coil component 10 includes a drum core 10C, a first wire 51, and a second wire 52. The drum core 10C has a winding core 11, a first flange 20, and a second flange 30. The first wire 51 has a first winding portion 51A. The second wire 52 has a second winding portion 52A. The second wire 52 is traced from an end on the first flange 20 side to the second flange 30 side. At this time, a point where the second wire 52 first contacts an outer peripheral surface of the first wire 51 is defined as a specific point SP, and one round of the second wire 52 wound from the specific point SP toward the second flange 30 side is defined as a specific turn ST. The second winding portion 52A has two intersection points where the second wire 52 intersects the first wire 51 within a range of the specific turn ST.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a coil component and a method for manufacturing a coil component. [Background technology]

[0002] The coil component described in Patent Document 1 includes a winding core portion and two flange portions. The winding core portion is in the shape of a rectangular prism. The two flange portions are connected to both ends of the winding core portion. Each flange portion protrudes outward from the winding core portion in a direction perpendicular to the central axis of the winding core portion. The winding core portion and the flange portions are made of a magnetic material. The winding core portion and the flange portions form the core of the coil component.

[0003] The coil component includes four external electrodes, a first wire, and a second wire. The first wire is wound around a winding core. The portion of the first wire that is wound around the winding core is in contact with the outer circumferential surface of the winding core. Adjacent turns of the first wire are in contact with each other.

[0004] A majority of the second wire is wound around the core. The second wire is wound in the same direction as the first wire. The portion of the second wire that is wound around the core is located on the outer periphery of the first wire. Each turn of the second wire is located between grooves formed by adjacent turns of the first wire. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2020-126976 A Summary of the Invention [Problem to be solved by the invention]

[0006] In the coil component described in Patent Document 1, when the second wire is wound around the winding core, the second wire is pressed against the first wire. This pressing force can cause the second wire, which should be positioned on the outer periphery of the first wire, to fall between adjacent turns of the first wire. If the wires are wound in a state different from the design in this way, the coil component may not be able to exhibit the designed characteristics. [Means for solving the problem]

[0007] In order to solve the above problem, the present invention provides a drum core having a columnar winding core portion, a first flange portion connected to a first end in a direction along a central axis of the winding core portion, and a second flange portion connected to a second end of the winding core portion opposite to the first end, a first wire wound around the winding core portion, and a second wire wound around the winding core portion, wherein the first wire has a first winding portion wound around the central axis, and the second wire has a second winding portion wound around the central axis, and when the second wire is traced from an end on the first flange portion side to the second flange portion side, a specific point is a point where the second wire first comes into contact with the first wire on the side opposite to the winding core portion as viewed from the first wire, and when one revolution of the second wire wound from the specific point toward the second flange portion side is defined as a specific turn, the second winding portion has two intersection points where the second wire crosses the first wire within the range of the specific turn. When the second wire is traced from the end on the first flange side to the second flange side, a point where the second wire first comes into contact with an outer circumferential surface of the winding core is defined as 0 turn of the second winding part, and the number of turns increases by 1 for each revolution around the central axis toward the second flange side. The specific point is located within a range of 0.5 turn or more and less than 1 turn of the second winding part. It is a coil component.

[0008] In order to solve the above-mentioned problems, the present invention provides a winding method comprising: a first step of winding a first wire around a drum core having a columnar winding core portion, a first flange portion connected to a first end in a direction along a central axis of the winding core portion, and a second flange portion connected to a second end of the winding core portion on an opposite side to the first end; and a second step of winding a second wire around the drum core. In the first step, the first wire is wound around the winding core portion from the first flange portion side around the central axis to form a first winding wire. a winding portion is formed, and in the second step, the second wire is wound around the winding core portion from the first flange side around the central axis to form a second winding portion, and when the second wire is traced from the end of the second wire on the first flange side to the second flange side, a point where the second wire first comes into contact with the first wire on the opposite side to the winding core portion as viewed from the first wire is defined as a specific point, and one revolution of the second wire wound from the specific point toward the second flange side is defined as a specific turn. When the second wire is traced from the end on the first flange side to the second flange side, the first contact point with the outer circumferential surface of the winding core portion is defined as 0 turns of the second winding portion, and the number of turns increases by 1 for each revolution around the central axis toward the second flange side, In the second step, The specific portion is located within a range of 0.5 turns or more and less than 1 turn of the second winding portion, and A method for manufacturing a coil component includes winding the second wire such that the second wire crosses the first wire twice within the range of the specific turns.

[0009] According to the above configuration, the portion of the second wire of the specific turn between the two intersections contacts the first wire from the first flange side, while the other portion contacts the first wire from the second flange side. Therefore, the portion of the first wire that contacts the second wire of the specific turn is sandwiched by the second wire from both sides in the direction along the central axis. Therefore, the portion of the first wire that contacts the second wire of the specific turn is less likely to be displaced in the direction along the central axis due to the pressing force of the second wire of the specific turn. And, if the portion of the first wire that contacts the second wire of the specific turn is less likely to be displaced, the other portions of the first wire are also less likely to be displaced. As a result, there is a high possibility that each wire can be wound as planned. Effect of the Invention

[0010] This can suppress irregular winding of coil components. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a perspective view of a coil component. [Diagram 2] FIG. 2 is a plan view of the coil component when viewed in the third negative direction. [Diagram 3] FIG. 3 is a side view of the coil component when viewed in the second negative direction. [Figure 4] FIG. 4 is a plan view of the coil device when viewed in the third positive direction. [Diagram 5] FIG. 5 is a side view of the coil device when viewed in the second forward direction. [Figure 6] FIG. 6 is a partial cross-sectional view of a coil component of a comparative example. [Figure 7] FIG. 7 is a partial cross-sectional view of a coil component of a comparative example. [Figure 8] FIG. 8 is a partial cross-sectional view of the coil component. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment of a coil component will be described. In the drawings, components may be shown enlarged to facilitate understanding. The dimensional ratios of the components may differ from those in the actual product or from those in other drawings.

[0013] <Overall structure> As shown in FIG. 1, the coil device 10 includes a drum core 10C and a top plate 12.

[0014] The drum core 10C has a winding core portion 11, a first flange portion 20, and a second flange portion 30. The winding core 11 is in the shape of a quadrangular prism. A cross section perpendicular to the central axis C of the winding core 11 is in the shape of a rectangle. Note that the "rectangular shape" referred to here may be any shape having four sides and being rectangular overall, and may also include a rectangular shape with chamfered corners. The material of the winding core 11 is a non-conductive material. Specifically, the material of the winding core 11 is, for example, alumina, Ni-Zn ferrite, resin, a mixture thereof, or the like.

[0015] Here, a specific axis parallel to the central axis C of the winding core 11 is defined as the first axis X. An axis perpendicular to the first axis X is defined as the second axis Y. In this embodiment, the second axis Y is parallel to two of the four sides of the winding core 11 when viewed in a direction along the first axis X. An axis perpendicular to both the first axis X and the second axis Y is defined as the third axis Z. In this embodiment, the third axis Z is parallel to the remaining two of the four sides of the winding core 11 when viewed in a direction along the first axis X. One of the directions along the first axis X is defined as the first positive direction X1, and the opposite direction to the first positive direction X1 is defined as the first negative direction X2. Similarly, one of the directions along the second axis Y is defined as the second positive direction Y1, and the opposite direction to the second positive direction Y1 is defined as the second negative direction Y2. Moreover, one of the directions along the third axis Z is defined as a third positive direction Z1, and the direction opposite to the third positive direction Z1 is defined as a third negative direction Z2.

[0016] As shown in FIG. 2 to FIG. 5, the winding core portion 11 has a first outer peripheral surface 11A, a second outer peripheral surface 11B, a third outer peripheral surface 11C, and a fourth outer peripheral surface 11D. In this embodiment, the first outer peripheral surface 11A is a surface facing the third positive direction Z1. The second outer peripheral surface 11B is an outer peripheral surface adjacent to the first outer peripheral surface 11A. The second outer peripheral surface 11B is a surface facing the second positive direction Y1. The third outer peripheral surface 11C is a surface adjacent to the second outer peripheral surface 11B and parallel to the first outer peripheral surface 11A. Therefore, the third outer peripheral surface 11C is a surface facing the third negative direction Z2. The fourth outer peripheral surface 11D is a surface adjacent to the third outer peripheral surface 11C and the first outer peripheral surface 11A, and parallel to the second outer peripheral surface 11B. Therefore, the fourth outer peripheral surface 11D is a surface facing the second negative direction Y2. 2 and subsequent figures, the top plate 12 is omitted from the illustration.

[0017] 1, the first flange portion 20 is connected to a first end, which is an end in the first positive direction X1, of the winding core portion 11. The first flange portion 20 protrudes outward relative to the winding core portion 11 in the direction along the second axis Y and the direction along the third axis Z.

[0018] The first flange 20 has a recess 21. The recess 21 is recessed with respect to an end face of the first flange 20 in the third positive direction Z1. The recess 21 is open to both sides of the first flange 20 in the direction along the first axis X. As a result, the end face of the first flange 20 on the third positive direction Z1 side is divided into two parts with the recess 21 in between. The first flange 20 has a symmetrical shape in the direction along the second axis Y.

[0019] The second flange portion 30 is connected to a second end, which is the end on the first negative direction X2 side, of the winding core portion 11. The first flange portion 20 and the second flange portion 30 are made of the same non-conductive material as the winding core portion 11. In addition, the first flange portion 20 and the second flange portion 30 are integrally molded with the winding core portion 11.

[0020] The second flange portion 30 has a symmetrical shape to the first flange portion 20 in the direction along the first axis X. That is, the second flange portion 30 protrudes outward relative to the winding core portion 11 in the direction along the second axis Y and the direction along the third axis Z. In addition, the second flange portion 30 has a recessed portion 31.

[0021] In this embodiment, the maximum dimension of the drum core 10C along the first axis X is 3.2 mm, the maximum dimension of the drum core 10C along the second axis Y is 2.5 mm, and the maximum dimension of the drum core 10C along the third axis Z is 2.3 mm.

[0022] The top plate 12 is a rectangular plate. The top plate 12 is flat in the direction along the third axis Z. The long side of the top plate 12 is parallel to the first axis X. The short side of the top plate 12 is parallel to the second axis Y. The top plate 12 is located on the third negative direction Z2 side with respect to the drum core 10C. The top plate 12 is connected to both the surface of the first flange 20 facing the third negative direction Z2 and the surface of the second flange 30 facing the third negative direction Z2. In other words, the top plate 12 is bridged between the first flange 20 and the second flange 30. The material of the top plate 12 is the same non-conductive material as that of the winding core 11.

[0023] The coil component 10 has four external electrodes 40. Two external electrodes 40 are located on the end surface of the first flange 20 on the third positive direction Z1 side. The remaining two external electrodes 40 are located on the end surface of the second flange 30 on the third positive direction Z1 side. That is, each external electrode 40 is located on the outer surface of the first flange 20 and the second flange 30 that faces the same direction as the first outer peripheral surface 11A. In addition, as a specific example, one of the external electrodes 40 is located on the second positive direction Y1 side with respect to the recessed portion 21 of the first flange 20. One of the external electrodes 40 is located on the second negative direction Y2 side with respect to the recessed portion 21 of the first flange 20. One of the external electrodes 40 is located on the second positive direction Y1 side with respect to the recessed portion 31 of the second flange 30. One of the external electrodes 40 is located on the side of the recess 31 of the second flange portion 30 in the second negative direction Y2.

[0024] Each external electrode 40 has a metal layer and a plating layer. The material of the metal layer is silver. The metal layer is formed on the outer surface of the first flange portion 20 or the second flange portion 30. The plating layer is made up of three layers. The plating layer is formed by stacking copper, nickel, and tin on the surface of the metal layer in this order. In FIG. 1, the boundaries between the metal layer and the plating layer are not shown. The end face of the coil component 10 on the third positive direction Z1 side is a mounting surface that faces the board when the coil component 10 is mounted on the board.

[0025] <Regarding the first and second wires> As shown in FIG. 1, the coil device 10 includes a first wire 51 and a second wire 52. Although not shown, the first wire 51 includes a copper wire and an insulating coating. The insulating coating covers the outer surface of the copper wire. The first wire 51 has a substantially circular shape in a cross section perpendicular to the direction in which the first wire 51 extends. The outer diameter of the first wire 51 is 100 μm or more. Specifically, the outer diameter of the first wire 51 is about 140 μm. The second wire 52 has the same configuration as the first wire 51. That is, the second wire 52 includes a copper wire and an insulating coating. The outer diameter of the second wire 52 is about 140 μm. In FIG. 1, the first wire 51 is indicated by a dot.

[0026] The first wire 51 has a first winding portion 51A and two first lead-out portions 51B. As shown in Figs. 2 to 5, the first winding portion 51A is a portion of the first wire 51 that is wound around the central axis C of the winding core 11. The first winding portion 51A is in contact with the outer circumferential surface of the winding core 11. The first wire 51 is wound from the first flange 20 side toward the second flange 30 side so as to face the first outer circumferential surface 11A, the second outer circumferential surface 11B, the third outer circumferential surface 11C, and the fourth outer circumferential surface 11D of the winding core 11 in this order.

[0027] 3, a first end of the first winding portion 51A, which is the end on the first flange 20 side, is located on the boundary between the first outer peripheral surface 11A and the second outer peripheral surface 11B of the winding core portion 11. The first end of the first winding portion 51A is the location that first comes into contact with the outer peripheral surface of the winding core portion 11 when the first wire 51 is traced from the end on the first flange 20 side to the second flange 30 side.

[0028] In the following description, the first end of the first wound portion 51A is defined as 0 turns of the first wound portion 51A. The number of turns increases by one for each revolution around the central axis C from the first end of the first wound portion 51A toward the second flange portion 30. The first wound portion 51A is wound around the winding core 11 so as to progress clockwise as the number of turns increases when viewed in the first negative direction X2.

[0029] 2, the first wire 51 of the first wound portion 51A extends obliquely on the first outer peripheral surface 11A so as to gradually approach the second flange portion 30 when traced from a first end of the first wound portion 51A. Then, as shown in FIGS. 3 to 5, the first wire 51 of the first wound portion 51A extends in a direction perpendicular to the first axis X on the second outer peripheral surface 11B, the third outer peripheral surface 11C, and the fourth outer peripheral surface 11D.

[0030] As shown in Fig. 5, the second end of the first winding portion 51A, which is the end on the second flange 30 side, is located on the boundary between the third outer peripheral surface 11C and the fourth outer peripheral surface 11D. As shown in Fig. 2, the second end of the first winding portion 51A is the point that first comes into contact with the outer peripheral surface of the winding core 11 when the first wire 51 is traced from the end on the second flange 30 side to the first flange 20 side.

[0031] 2, one of the first lead portions 51B extends from a first end of the first winding portion 51A toward the external electrode 40 located on the second negative direction Y2 side of the first flange portion 20. A tip of the first lead portion 51B is connected to the external electrode 40.

[0032] The remaining first lead portion 51B extends from the second end of the first winding portion 51A toward the external electrode 40 located on the second negative direction Y2 side of the second flange portion 30. A tip of the first lead portion 51B is connected to the external electrode 40.

[0033] The second wire 52 has a second winding portion 52A and two second lead-out portions 52B. The second winding portion 52A is a portion of the second wire 52 that is wound around the central axis C of the winding core 11. The second winding portion 52A is in contact with the outer peripheral surface of the winding core 11 or the first winding portion 51A. The second wire 52 is wound from the first flange 20 side toward the second flange 30 side so as to face the first outer peripheral surface 11A, the second outer peripheral surface 11B, the third outer peripheral surface 11C, and the fourth outer peripheral surface 11D of the winding core 11 in this order. In this embodiment, the second wire 52 is wound around the first end of the second winding portion 52A as a starting point, from the first flange 20 side toward the second flange 30 side so as to face the third outer peripheral surface 11C, the fourth outer peripheral surface 11D, the first outer peripheral surface 11A, and the second outer peripheral surface 11B in this order. Note that "facing the first outer peripheral surface 11A, the second outer peripheral surface 11B, the third outer peripheral surface 11C, and the fourth outer peripheral surface 11D in that order" indicates only the order of the outer peripheral surfaces of the winding core portion 11 that face each other, and also includes cases where the starting point is not the first outer peripheral surface 11A, as in this embodiment.

[0034] 3, a first end of the second winding portion 52A, which is the end on the first flange 20 side, is located on the boundary between the second outer peripheral surface 11B and the third outer peripheral surface 11C of the winding core portion 11. The first end of the second winding portion 52A is the point that first comes into contact with the outer peripheral surface of the winding core portion 11 when the second wire 52 is traced from the end on the first flange 20 side to the second flange 30 side.

[0035] As with the first wire 51 described above, the first end of the second winding portion 52A is defined as 0 turns of the second winding portion 52A. The number of turns increases by one for each revolution around the central axis C from the first end of the second winding portion 52A toward the second flange portion 30. The second winding portion 52A is wound around the winding core 11 so as to progress clockwise as the number of turns increases when viewed in the first negative direction X2.

[0036] 2, the second end of the second winding portion 52A, which is the end on the second flange 30 side, is located on the boundary between the first outer peripheral surface 11A and the fourth outer peripheral surface 11D. The second end of the second winding portion 52A is the point that first comes into contact with the outer peripheral surface of the winding core 11 when the second wire 52 is traced from the end on the second flange 30 side to the first flange 20 side.

[0037] One of the second lead portions 52B extends from a first end of the second winding portion 52A toward the external electrode 40 located on the second positive direction Y1 side of the first flange portion 20. A tip of the second lead portion 52B is connected to the external electrode 40.

[0038] The remaining second lead portion 52B extends from a second end of the second winding portion 52A toward the external electrode 40 located on the second positive direction Y1 side of the second flange portion 30. A tip of the second lead portion 52B is connected to the external electrode 40.

[0039] Assume that the second wire 52 is traced from the end on the first flange 20 side to the second flange 30 side. At this time, as shown in FIG. 2, when viewed from the first wire 51, the location that first comes into contact with the first wire 51 on the side opposite the winding core 11, i.e., on the outer circumferential side, is defined as the specific location SP. The specific location SP is located within a range of 0.5 turn or more and less than 1 turn of the second winding portion 52A. In this embodiment, the specific location SP is located at approximately 0.75 turn of the second winding portion 52A.

[0040] Here, one turn from the specific point SP of the second winding portion 52A is defined as the specific turn ST. That is, the specific turn ST is in the range of approximately 0.75 turns or more and less than 1.75 turns of the second winding portion 52A. As shown in FIG. 2 and FIG. 3, the second winding portion 52A has two intersection points CP within the range of the specific turns ST. The intersection points CP are points where the second wire 52 intersects with the first wire 51. In this embodiment, the intersection points CP are points where the center line of the second wire 52 crosses the center line of the first wire 51 when viewed in a direction perpendicular to the outer circumferential surface of the winding core portion 11 through which the first wire 51 and the second wire 52 extend.

[0041] Here, when the second wire 52 is traced from the end on the first flange 20 side to the end on the second flange 30 side, the intersection point CP closer to the first flange 20 among the two intersection points CP is defined as the first intersection point CP1. When the second wire 52 is traced from the end on the first flange 20 side to the end on the second flange 30 side, the intersection point CP closer to the second flange 30 among the two intersection points CP is defined as the second intersection point CP2. The first intersection point CP1 is located on the second outer peripheral surface 11B. When the second wire 52 is traced from the first flange 20 side to the second flange 30 side, the first intersection point CP1 is located within 0.5 turns from the specific point SP. The second intersection point CP2 is located on the first outer peripheral surface 11A. The number of turns from the first intersection point CP1 to the second intersection point CP2 is 0.5 turns or more. Specifically, the number of turns from the first intersection point CP1 to the second intersection point CP2 is about 0.75 turns. In addition, when the second wire 52 is traced from the first flange portion 20 side to the second flange portion 30 side, the second intersection point CP2 is located more than 0.5 turns and within 1 turn from the specific point SP.

[0042] As a result of the second winding portion 52A having two intersection points CP, a gap is generated between the second wire 52 of a specific turn ST of the second winding portion 52A and the next turn of the second wire 52 of about 1.75 turns or more and less than about 2.75 turns. In other words, within the range of 1.75 turns or more and less than 2.75 turns of the second winding portion 52A, the first wire 51 of the first winding portion 51A is exposed without being covered by the second wire 52.

[0043] As shown in FIG. 2, the second wire 52 of the second winding portion 52A excluding the specific turn ST extends from the first flange 20 side toward the second flange 30 side when the second wire 52 is traced from the end on the first flange 20 side to the end on the second flange 30 side on the first outer peripheral surface 11A. As shown in FIG. 3 to FIG. 5, the second wire 52 of the second winding portion 52A extends in a direction perpendicular to the first axis X on the second outer peripheral surface 11B, the third outer peripheral surface 11C, and the fourth outer peripheral surface 11D. However, the second wire 52 of a part including the first intersection point CP1 of the second winding portion 52A exceptionally extends from the second flange 30 side toward the first flange 20 side when the second wire 52 is traced from the end on the first flange 20 side to the end on the second flange 30 side. Specifically, the second wound portion 52A includes a portion extending from the second flange portion 30 side toward the first flange portion 20 side in a range of approximately 0.75 turns to 1 turn.

[0044] As described above, "extending from the first flange 20 side toward the second flange 30 side" does not necessarily mean extending parallel to the central axis C, but also includes extending obliquely in a direction intersecting the central axis C. In other words, "extending from the first flange 20 side toward the second flange 30 side" means that when tracing the wire from the end on the first flange 20 side to the end on the second flange 30 side, it is sufficient that the wire includes even a slight component in the first negative direction X2. The same is true for "extending from the second flange 30 side toward the first flange 20 side".

[0045] Furthermore, the second wires 52 aligned on the boundary between the first outer peripheral surface 11A and the second outer peripheral surface 11B of the winding core portion 11 have the same pitch P in the direction along the central axis C. In this embodiment, the second wires 52 adjacent to each other in the direction along the central axis C are in contact with each other on the boundary between the first outer peripheral surface 11A and the second outer peripheral surface 11B of the winding core portion 11.

[0046] <Manufacturing method of coil parts> The method for manufacturing the coil device 10 includes a preparation step, a first step, and a second step. In the preparation step, the drum core 10C having the external electrodes 40 attached thereto is prepared as follows.

[0047] First, in the preparation process, the drum core 10C is formed. First, ferrite powder is mixed with a synthetic resin binder, and the molded body formed by press molding is fired. Then, burrs are removed from the molded body using a barrel to form the drum core 10C. Next, a paste containing silver is baked on the surface of the first flange portion 20 facing the third positive direction Z1 and the surface of the second flange portion 30 facing the third positive direction Z1 in the drum core 10C. The external electrodes 40 are formed by plating the paste with copper, nickel, and tin in that order.

[0048] Next, in the first step, a first end of the first wire 51 is first thermocompression-bonded to the external electrode 40 located on the second negative direction Y2 side of the first flange 20. Then, the first wire 51 is wound around the winding core 11 from the first flange 20 side toward the second flange 30 side. This forms a first wound portion 51A in contact with the outer circumferential surface of the winding core 11. Then, a second end of the first wire 51 is thermocompression-bonded to the external electrode 40 located on the second negative direction Y2 side of the second flange 30.

[0049] Next, in the second step, the first end of the second wire 52 is first thermocompression-bonded to the external electrode 40 located on the second positive direction Y1 side of the first flange 20. Next, the second wire 52 is wound around the winding core 11 and the outer circumferential side of the first wire 51. This forms the second winding portion 52A in contact with the outer circumferential surface of the winding core 11 or the first winding portion 51A. When the second wire 52 of the specific turns ST is wound around the winding core 11, the second wire 52 is wound while approaching the first flange 20, thereby crossing the first wire 51. This forms the first intersection point CP1. Then, the second wire 52 is wound while approaching the second flange 30, thereby crossing the first wire 51 again. This forms the second intersection point CP2. After forming the second winding portion 52A, the second end of the second wire 52 is thermocompression bonded to the external electrode 40 located on the second flange portion 30 in the second positive direction Y1.

[0050] <Comparison with a conventional example in which the second wire does not have an intersection> As shown in Fig. 6, a conventional coil device 100 is assumed in which the second wire 52 does not have an intersection point CP and always extends from the first flange 20 side toward the second flange 30 side. In the example shown in Fig. 6, one turn of the second wire 52 is wound around the outer circumferential side of the first wire 51 between the zeroth turn and the first turn of the first wire 51. In the example shown in Fig. 6, the second turn and thereafter of the second wire 52 are wound around the outer circumferential side of the first wire 51 in order between adjacent turns of the first wire 51.

[0051] Here, when the second wire 52 is wound, the second wire 52 is wound while being pressed against the first wire 51. That is, as shown in Fig. 6, the second wire 52 is pressed against the winding core portion 11 in the direction of arrow P1. Then, the 0 turn of the first wire 51 tries to move in the direction of arrow P2.

[0052] As a result, as shown in FIG. 7, the second wire 52, which should be positioned on the outer circumferential side of the first wire 51, may end up falling between the 0th turn and the 1st turn of the first wire 51.

[0053] In contrast, according to the coil device 10 of the above embodiment, when the second wire 52 is wound around the outer periphery of the first wire 51, the second wire 52 is pressed against the first wire 51. At this time, the second wire 52 of the specific turn ST in a range from the first intersection point CP1 to the second intersection point CP2 contacts the first wire 51 from the first flange 20 side. On the other hand, the second wire 52 of the specific turn ST except for the range from the first intersection point CP1 to the second intersection point CP2 contacts the first wire 51 from the second flange 30 side. In other words, the portion of the first wire 51 that contacts the second wire 52 of the specific turn ST is sandwiched from both sides by the second wire 52 of the specific turn ST.

[0054] 8, one turn of the second wire 52 is wound around the outer periphery of the first wire 51 between zero turns of the second wire 52 and zero turns of the first wire 51. Therefore, when one turn of the second wire 52 is wound around the outer periphery of the first wire 51, the zero turn of the first wire 51 tries to move in the direction of the arrow P3, that is, in the direction approaching the one turn of the first wire 51.

[0055] Furthermore, the two turns of the second wire 52 are wound around the outer periphery of the first wire 51 between the first and second turns of the first wire 51. Therefore, when the two turns of the second wire 52 are wound around the outer periphery of the first wire 51, the one turn of the first wire 51 tries to move in the direction of the arrow P4, i.e., in the direction approaching the zero turn of the first wire 51.

[0056] In this way, the force of the 0 turn of the first wire 51 moving toward the arrow P3 and the force of the 1 turn of the first wire 51 moving toward the arrow P4 are in opposite directions. Therefore, the two forces cancel each other out. As a result, the 0 turn and the 1 turn of the first wire 51 are unlikely to move even when subjected to a pressing force from the second wire 52.

[0057] <Effects of this embodiment> (1) As described above, the portion of the first wire 51 that contacts the second wire 52 of the specific turn ST is sandwiched between the second wire 52 from both sides in the direction along the central axis C. Therefore, the portion of the first wire 51 that contacts the second wire 52 of the specific turn ST is less likely to shift in position in the direction along the central axis C due to the pressing force of the second wire 52 of the specific turn ST. If the portion of the first wire 51 that contacts the second wire 52 of the specific turn ST is less likely to shift in position, other portions of the first wire 51 are also less likely to shift in position. In addition, the second wire 52 that is wound around the outer periphery of the first wire 51 is also less likely to shift in position. As a result, there is a high possibility that each wire can be wound as designed.

[0058] (2) In the direction along the central axis C, the second wire 52 is wound closely to each other near the center of the second winding portion 52A. Therefore, the second wire 52 is less likely to be displaced in the direction along the central axis C near the center of the second winding portion 52A than near the first end of the second winding portion 52A. In other words, near the first end of the second winding portion 52A, the second wire 52 is more likely to be displaced in the direction along the central axis C due to falling off the first wire 51, etc. According to the above embodiment, the specific point SP is located within a range of 0.5 turn or more and less than 1 turn of the second winding portion 52A. Accordingly, the two intersection points CP of the second winding portion 52A are also located in a relatively early turn of the second winding portion 52A. Therefore, the effect of (1) can be exerted in the second winding portion 52A at a place that is likely to fall off the first wire 51.

[0059] (3) According to the above embodiment, the first intersection point CP1 is located on the second outer peripheral surface 11B of the winding core portion 11. In this way, since the first intersection point CP1 is located on the outer peripheral surface of the winding core portion 11, it is possible to prevent the position of the first intersection point CP1 from shifting compared to when the first intersection point CP1 is located on the boundary between adjacent outer peripheral surfaces.

[0060] (4) According to the above embodiment, the second intersection point CP2 is located on the first outer peripheral surface 11A of the winding core portion 11. In this way, since the second intersection point CP2 is located on the outer peripheral surface of the winding core portion 11, it is possible to prevent the position of the second intersection point CP2 from shifting compared to when the second intersection point CP2 is located on the boundary between adjacent outer peripheral surfaces.

[0061] (5) Since the second wire 52 crosses over the first wire 51 at the first crossing point CP1 and the second crossing point CP2, there is a possibility that each crossing point CP may be misaligned when the wire is wound. In particular, when the distance from the first crossing point CP1 to the second crossing point CP2 is excessively short, there is an increased possibility that each crossing point CP may be misaligned.

[0062] According to the above embodiment, the first intersection point CP1 is located on the second outer peripheral surface 11B of the winding core portion 11. Moreover, the second intersection point CP2 is located on the first outer peripheral surface 11A of the winding core portion 11. That is, when the second wire 52 is traced from the first flange portion 20 side to the second flange portion 30 side, there is 0.5 turns or more from the first intersection point CP1 to the second intersection point CP2. According to this configuration, the first intersection point CP1 and the second intersection point CP2 are less likely to become misaligned compared to a configuration in which the interval between the first intersection point CP1 and the second intersection point CP2 is less than 0.5 turns.

[0063] (6) In the above embodiment, each external electrode 40 is located on one of the outer surfaces of the first flange portion 20 and the second flange portion 30, the surface facing the same direction as the first outer peripheral surface 11A. In addition, in the present embodiment, the first intersection point CP1 is located on the second outer peripheral surface 11B of the winding core portion 11. That is, the first end of the second winding portion 52A is pressed against the second wire 52 after the intersection. This makes it difficult for the second winding portion 52A to separate from the winding core portion 11.

[0064] (7) According to the above embodiment, the second wire 52 arranged on the boundary between the first outer peripheral surface 11A and the second outer peripheral surface 11B have the same pitch P in the direction along the central axis C. Therefore, when the second wire 52 is wound around the outer peripheral surfaces of the winding core 11 and the first wire 51, winding irregularities are unlikely to occur.

[0065] (8) In the above embodiment, when the second wire 52 is traced from the first flange portion 20 side to the second flange portion 30 side, the first intersection point CP1 is located within 0.5 turns from the specific point SP. Similarly, the second intersection point CP2 is located more than 0.5 turns but within 1 turn from the specific point SP. That is, the first intersection point CP1 is formed in the first half section of the specific turn ST. Also, the second intersection point CP2 is formed in the second half section of the specific turn ST. Since the intersection points CP are not concentrated in a portion of the specific turn ST, the first intersection point CP1 and the second intersection point CP2 are unlikely to be misaligned.

[0066] (9) In the above embodiment, the portion of the second winding portion 52A excluding the specific turn ST extends in a direction perpendicular to the central axis C or from the first flange 20 side to the second flange 30 side when traced from the first end of the second winding portion 52A. On the other hand, the portion of the second winding portion 52A including the first intersection point CP1 extends from the second flange 30 side to the first flange 20 side when traced from the first end of the second winding portion 52A. That is, the portion including the first intersection point CP1 has a different winding direction from the portion of the second winding portion 52A excluding the specific turn ST. By purposely making the winding directions different in this way, the two intersection points CP can be easily formed.

[0067] (10) According to the above embodiment, the coil device 10 is manufactured by a first step of winding the first wire 51 around the winding core portion 11, and a second step of winding the second wire 52 after the first step. This makes it easier to form two intersection points CP in the second winding portion 52A than in a manufacturing method in which the first wire 51 and the second wire 52 are wound simultaneously.

[0068] (11) The larger the outer diameter of the second wire 52, the greater the force required to shape the second wire 52, and therefore the greater the force pressing the first wire 51 when winding the second wire 52. Therefore, the larger the outer diameter of the second wire 52, the greater the possibility that the first wire 51 will be misaligned in the direction along the central axis C. In the above embodiment, the outer diameter of the second wire 52 is 140 μm. It is particularly suitable to apply the technology of the above embodiment to a wire having such an outer diameter.

[0069] <Example of change> This embodiment can be modified as follows: This embodiment and the following modifications can be combined with each other to the extent that there is no technical contradiction.

[0070] In the above embodiment, the configuration of the coil component 10 is not limited. For example, the coil component 10 may be provided without the top plate 12. Furthermore, the shape of the first flange portion 20 is not limited to the shape of the above embodiment. For example, the first flange portion 20 may be provided without the recessed portion 21.

[0071] In the above embodiment, the winding core 11 does not have to be a rectangular prism. For example, the cross-sectional shape of the winding core 11 may be a circle, an ellipse, or a polygon other than a rectangle. In other words, the winding core 11 does not have to include the first outer peripheral surface 11A to the fourth outer peripheral surface 11D.

[0072] In the above embodiment, the ridges of the winding core portion 11 may be chamfered. That is, the boundaries of the outer circumferential surfaces include curved surfaces formed, for example, by R-chamfering corners that form adjacent flat surfaces.

[0073] In the above embodiment, the shape and dimensions of the drum core 10C are not limited to the examples in the above embodiment. In the above embodiment, the material of the external electrode 40 is not limited to the example of the above embodiment. For example, the material of the plating layer of the external electrode 40 may be a nickel alloy or the like. Also, the external electrode 40 may not have a plating layer, and a conductive metal layer may be exposed. Also, the external electrode 40 may be a plate-shaped metal terminal.

[0074] In the above embodiment, the outer diameters of the first wire 51 and the second wire 52 are not limited to the examples in the above embodiment. In the above embodiment, the position of the specific point SP is not limited to that in the above embodiment. For example, the specific point SP may be located at a position less than 0.5 turns away from the second winding portion 52A, or may be located at a position one turn or more away from the second winding portion 52A.

[0075] In the above embodiment, the position of the 0th turn of the second winding portion 52A does not have to be located on the boundary between the first outer peripheral surface 11A and the second outer peripheral surface 11B. For example, the 0th turn of the second winding portion 52A may be located on the second outer peripheral surface 11B, or may be located on the boundary between outer peripheral surfaces different from those in the above embodiment.

[0076] In the above embodiment, the first winding portion 51A may be wound either around the winding core 11 or around the second wire 52. The same applies to the second winding portion 52A, and the second winding portion 52A may be wound either around the winding core 11 or around the first wire 51.

[0077] In the above embodiment, the positions of the first intersection point CP1 and the second intersection point CP2 are not limited to the examples in the above embodiment. That is, the first intersection point CP1 does not have to be located on the second outer peripheral surface 11B of the winding core portion 11. Moreover, the second intersection point CP2 does not have to be located on the first outer peripheral surface 11A of the winding core portion 11. Moreover, as a result of changing the position of each intersection point CP, the number of turns from the first intersection point CP1 to the second intersection point CP2 may be less than 0.5 turns.

[0078] In the above embodiment, when the second wire 52 is traced from the first flange 20 side to the second flange 30 side, the first intersection point CP1 may be located more than 0.5 turn and within 1 turn from the specific point SP. Also, the second intersection point CP2 may be located within 0.5 turn from the specific point SP.

[0079] In the above embodiment, the pitches P of the second wires 52 in the direction along the central axis C may not be equal on the boundary between the first outer peripheral surface 11A and the second outer peripheral surface 11B. Furthermore, the pitches P of the second wires 52 in the direction along the central axis C may be equal at another location. Note that, even if the pitches P of the second wires 52 in the direction along the central axis C are not equal in the coil device 10, the effect of (1) can be obtained. Furthermore, the first wires 51 may be located between the second wires 52 adjacent to each other in the direction along the central axis C.

[0080] In the above embodiment, a part of the second winding portion 52A including the first intersection point CP1 may extend from the first flange portion 20 side toward the second flange portion 30 side. In other words, at the first intersection point CP1, the second wire 52 may cross the first wire 51 from the first flange portion 20 side toward the second flange portion 30 side.

[0081] In the above embodiment, the first step and the second step may be carried out simultaneously. In the above embodiment, the manufacturing method of the drum core 10C prepared in the preparation step is not limited to the example of the above embodiment. For example, the drum core 10C may be formed by grinding a rectangular parallelepiped ferrite core.

[0082] The technical ideas that can be derived from the above-described embodiments and modifications will be described below. [1] A coil component comprising: a drum core having a columnar winding core portion, a first flange portion connected to a first end in a direction along a central axis of the winding core portion, and a second flange portion connected to a second end of the winding core portion opposite the first end; a first wire wound around the winding core portion; and a second wire wound around the winding core portion, wherein the first wire has a first winding portion wound around the central axis, and the second wire has a second winding portion wound around the central axis, wherein a specific point is a point where the second wire first comes into contact with the first wire on the side opposite the winding core portion as viewed from the first wire when the second wire is traced from an end of the second wire on the first flange portion side to the second flange portion side, and when one revolution of the second wire wound from the specific point toward the second flange portion side is defined as a specific turn, the second winding portion has two intersection points where the second wire crosses the first wire within the range of the specific turn.

[0083] [2] The coil component described in [1], wherein when the second wire is traced from the end on the first flange side to the second flange side, the point where it first comes into contact with the outer peripheral surface of the winding core portion is defined as turn 0 of the second winding portion, and the number of turns increases by one for each revolution around the central axis toward the second flange side, the specific point is located within a range of 0.5 turns or more and less than 1 turn of the second winding portion.

[0084] [3] A cross section of the winding core portion perpendicular to the central axis is rectangular, the winding core portion has a first outer peripheral surface, a second outer peripheral surface adjacent to the first outer peripheral surface, a third outer peripheral surface adjacent to the second outer peripheral surface and parallel to the first outer peripheral surface, and a fourth outer peripheral surface adjacent to the third outer peripheral surface and the first outer peripheral surface and parallel to the second outer peripheral surface, and when the second wire is traced from the end on the first flange side to the second flange side, the first contact point with the outer peripheral surface of the winding core portion is defined as 0 turns of the second winding portion, and The coil component according to [1] or [2], wherein the second wire is wound so as to face the first outer peripheral surface, the second outer peripheral surface, the third outer peripheral surface, and the fourth outer peripheral surface in that order from the first flange side to the second flange side, and when the intersection point closer to the first flange of the two intersection points is defined as a first intersection point when the second wire is traced from the first flange side to the second flange side, the first intersection point is located on the second outer peripheral surface.

[0085] [4] When tracing the second wire from the end on the first flange side to the second flange side, the point where it first comes into contact with the outer peripheral surface of the winding core portion is defined as 0 turn of the second winding portion, and the number of turns increases by 1 for each full revolution around the central axis toward the second flange side, the specific point is located within a range of 0.5 turn to less than 1 turn of the second winding portion, and the coil component further comprises an external electrode to which an end of the first wire and an end of the second wire are connected, and the external electrode is located on a surface of the outer surfaces of the first flange and the second flange that faces the same direction as the first outer peripheral surface.

[0086] [5] The coil component according to any one of [1] to [4], wherein a cross section of the winding core portion perpendicular to the central axis is rectangular, the winding core portion has a first outer peripheral surface, a second outer peripheral surface adjacent to the first outer peripheral surface, a third outer peripheral surface adjacent to the second outer peripheral surface and facing the first outer peripheral surface, and a fourth outer peripheral surface adjacent to the third outer peripheral surface and the first outer peripheral surface and facing the second outer peripheral surface, wherein when the second wire is traced from an end of the second flange portion toward the second flange portion, a point where the second wire first comes into contact with the outer peripheral surface of the winding core portion is defined as a 0th turn of the second winding portion, the 0th turn of the second winding portion is located on a boundary between the second outer peripheral surface and the third outer peripheral surface, and when the second wire is traced from the end of the second flange portion toward the second flange portion, the second intersection point is located on the first outer peripheral surface.

[0087] [6] A cross section of the winding core portion perpendicular to the central axis is rectangular, the winding core portion has a first outer peripheral surface, a second outer peripheral surface adjacent to the first outer peripheral surface, a third outer peripheral surface adjacent to the second outer peripheral surface and facing the first outer peripheral surface, and a fourth outer peripheral surface adjacent to the third outer peripheral surface and the first outer peripheral surface and facing the second outer peripheral surface, The coil component according to any one of [1] to [5], wherein 0 turn of the second winding portion is located on the boundary between the second outer peripheral surface and the third outer peripheral surface, and when the second wire is traced from the first flange side to the second flange side, of the two intersection points, the intersection point closer to the first flange is defined as a first intersection point and the intersection point closer to the second flange is defined as a second intersection point, the first intersection point is located on the second outer peripheral surface and the second intersection point is located on the first outer peripheral surface.

[0088] [7] A coil component according to any one of [3] to [6], wherein the second wires arranged on the boundary between the first outer surface and the second outer surface have the same pitch in the direction along the central axis.

[0089] [8] A coil component according to any one of [1] to [7], wherein when the second wire is traced from the first flange side to the second flange side, of the two intersection points, the intersection point closer to the first flange is defined as a first intersection point, and the intersection point closer to the second flange is defined as a second intersection point, the number of turns from the first intersection point to the second intersection point is 0.5 turns or more.

[0090] [9] A coil component according to any one of [1] to [8], wherein when the second wire is traced from the first flange side to the second flange side, the first intersection point is located within 0.5 turns from the specific point when the first intersection point is one of the two intersection points that is closer to the first flange.

[0091]

[10] A coil component according to any one of [1] to [9], wherein when the second wire is traced from the first flange side to the second flange side, the second intersection point is defined as the intersection point closer to the second flange side of the two intersection points, and the second intersection point is located more than 0.5 turns and within 1 turn from the specific point.

[0092]

[11] A coil component according to any one of [1] to

[10] , wherein when the second wire is traced from the first flange side to the second flange side, of the two intersection points, the intersection point closer to the first flange is defined as a first intersection point, and the intersection point closer to the second flange is defined as a second intersection point, the first intersection point is located within 0.5 turns from the specific point, and the second intersection point is located greater than 0.5 turns and within 1 turn from the specific point.

[0093]

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

[11] , wherein when the second wire is traced from the first flange side to the second flange side, the intersection point of the two intersection points that is closer to the first flange is defined as a first intersection point, and when the second wire is traced from the first flange side to the second flange side, a portion of the second winding portion excluding the specific turn extends in a direction perpendicular to the central axis or from the first flange side toward the second flange side, and a portion of the second winding portion including the first intersection point extends from the second flange side toward the first flange side.

[0094]

[13] A winding method comprising: a first step of winding a first wire around a drum core having a columnar winding core portion, a first flange portion connected to a first end of the winding core portion in a direction along a central axis thereof, and a second flange portion connected to a second end of the winding core portion opposite to the first end; and a second step of winding a second wire around the drum core, wherein in the first step, a first wound portion is formed by winding the first wire around the winding core portion from the first flange portion side around the central axis; and in the second step, a winding method comprising the steps of: A method for manufacturing a coil component in which a second winding portion is formed by winding the second wire around a winding core, and when the second wire is traced from the end of the second wire on the first flange side toward the second flange side, a specific point is a point where the second wire first comes into contact with the first wire on the side opposite the winding core as viewed from the first wire, and one revolution of the second wire wound from the specific point toward the second flange side is a specific turn, in the second process, the second wire is wound so that the second wire crosses the first wire twice within the range of the specific turn. [Explanation of symbols]

[0095] C…Central axis CP1: First intersection CP2: Second intersection SP: Specific location ST: Specific turn 10...Coil parts 10C…Drum core 11...Core 20…First flange 30…Second flange 51…First wire 51A…1st winding section 52…Second wire 52A…Second winding section

Claims

1. a drum core having a columnar winding core portion, a first flange portion connected to a first end of the winding core portion in a direction along a central axis thereof, and a second flange portion connected to a second end of the winding core portion on the opposite side to the first end; A first wire wound around the winding core; A second wire wound around the winding core; Equipped with The first wire has a first winding portion wound around the central axis, the second wire has a second winding portion wound around the central axis, When the second wire is traced from the end on the first flange side to the second flange side, a location where the second wire first comes into contact with the first wire on the opposite side to the winding core as viewed from the first wire is defined as a specific location, and one revolution of the second wire wound from the specific location toward the second flange side is defined as a specific turn. the second winding portion has two intersections at which the second wire intersects with the first wire within the range of the specific turn, When the second wire is traced from the end on the first flange side to the second flange side, the first contact point with the outer circumferential surface of the winding core portion is defined as 0 turns of the second winding portion, and the number of turns increases by 1 for each revolution around the central axis toward the second flange side, The specific portion is located within a range of 0.5 turn or more and less than 1 turn of the second winding portion. Coil parts.

2. A cross section of the winding core portion perpendicular to the central axis is rectangular, The winding core portion is A first outer circumferential surface; a second outer circumferential surface adjacent to the first outer circumferential surface; a third outer peripheral surface adjacent to the second outer peripheral surface and parallel to the first outer peripheral surface; a fourth outer peripheral surface adjacent to the third outer peripheral surface and the first outer peripheral surface and parallel to the second outer peripheral surface, When the second wire is traced from the end on the first flange side to the second flange side, the first contact point with the outer circumferential surface of the winding core portion is defined as 0 turns of the second winding portion. the 0th turn of the second winding portion is located on the boundary between the second outer peripheral surface and the third outer peripheral surface, the second wire is wound so as to face the first outer peripheral surface, the second outer peripheral surface, the third outer peripheral surface, and the fourth outer peripheral surface in this order from the first flange side to the second flange side, When the second wire is traced from the first flange side to the second flange side, the first intersection point is one of the two intersection points closer to the first flange. The first intersection point is located on the second outer circumferential surface. The coil component according to claim 1 .

3. When the second wire is traced from the end on the first flange side to the second flange side, the first contact point with the outer circumferential surface of the winding core portion is defined as 0 turns of the second winding portion, and the number of turns increases by 1 for each revolution around the central axis toward the second flange side, the specific portion is located within a range of 0.5 turn or more and less than 1 turn of the second winding portion, an external electrode to which an end of the first wire and an end of the second wire are connected; The external electrode is located on one of the outer surfaces of the first flange portion and the second flange portion that faces in the same direction as the first outer peripheral surface. The coil component according to claim 2 .

4. A cross section of the winding core portion perpendicular to the central axis is rectangular, The winding core portion is A first outer circumferential surface; a second outer circumferential surface adjacent to the first outer circumferential surface; a third outer circumferential surface adjacent to the second outer circumferential surface and facing the first outer circumferential surface; a fourth outer peripheral surface adjacent to the third outer peripheral surface and the first outer peripheral surface and facing the second outer peripheral surface, When the second wire is traced from the end on the first flange side to the second flange side, the first contact point with the outer circumferential surface of the winding core portion is defined as 0 turns of the second winding portion. the 0th turn of the second winding portion is located on the boundary between the second outer peripheral surface and the third outer peripheral surface, When the second wire is traced from the first flange side to the second flange side, the intersection point closer to the second flange side out of the two intersection points is defined as a second intersection point, The second intersection point is located on the first outer circumferential surface. The coil component according to claim 1 .

5. A cross section of the winding core portion perpendicular to the central axis is rectangular, The winding core portion is A first outer circumferential surface; a second outer circumferential surface adjacent to the first outer circumferential surface; a third outer circumferential surface adjacent to the second outer circumferential surface and facing the first outer circumferential surface; a fourth outer peripheral surface adjacent to the third outer peripheral surface and the first outer peripheral surface and facing the second outer peripheral surface, When the second wire is traced from the end on the first flange side to the second flange side, the first contact point with the outer circumferential surface of the winding core portion is defined as 0 turns of the second winding portion. the 0th turn of the second winding portion is located on the boundary between the second outer peripheral surface and the third outer peripheral surface, When the second wire is traced from the first flange side to the second flange side, of the two intersection points, the intersection point closer to the first flange is defined as a first intersection point, and the intersection point closer to the second flange is defined as a second intersection point, the first intersection point is located on the second outer circumferential surface, The second intersection point is located on the first outer circumferential surface. The coil component according to claim 1 .

6. The second wires arranged on the boundary between the first outer peripheral surface and the second outer peripheral surface have equal pitches in a direction along the central axis. The coil component according to any one of claims 2 to 5.

7. When the second wire is traced from the first flange side to the second flange side, of the two intersection points, the intersection point closer to the first flange is defined as a first intersection point, and the intersection point closer to the second flange is defined as a second intersection point, The number of turns from the first intersection point to the second intersection point is 0.5 turns or more. The coil component according to claim 1 .

8. When the second wire is traced from the first flange side to the second flange side, the first intersection point is one of the two intersection points closer to the first flange. The first intersection point is located within 0.5 turns from the specific point. The coil component according to claim 1 .

9. When the second wire is traced from the first flange side to the second flange side, the intersection point closer to the second flange side out of the two intersection points is defined as a second intersection point, The second intersection point is located within 1 turn from the specific point, but is greater than 0.5 turns. The coil component according to claim 1 .

10. When the second wire is traced from the first flange side to the second flange side, of the two intersection points, the intersection point closer to the first flange is defined as a first intersection point, and the intersection point closer to the second flange is defined as a second intersection point, the first intersection point is located within 0.5 turns from the specific point; The second intersection point is located within 1 turn from the specific point, but is greater than 0.5 turns. The coil component according to claim 1 .

11. When the second wire is traced from the first flange side to the second flange side, the first intersection point is one of the two intersection points closer to the first flange. When the second wire is traced from the first flange side to the second flange side, a portion of the second winding portion excluding the specific turn extends in a direction perpendicular to the central axis or from the first flange portion side toward the second flange portion side, A portion of the second winding portion including the first intersection portion extends from the second flange portion side toward the first flange portion side. The coil component according to claim 1 .

12. a first step of winding a first wire around a drum core having a columnar winding core portion, a first flange portion connected to a first end of the winding core portion in a direction along a central axis thereof, and a second flange portion connected to a second end of the winding core portion on an opposite side to the first end; A second step of winding a second wire around the drum core, In the first step, the first wire is wound around the winding core from the first flange side about the central axis to form a first winding portion; In the second step, the second wire is wound around the winding core from the first flange side about the central axis to form a second winding portion, When the second wire is traced from the end on the first flange side to the second flange side, a location where the second wire first comes into contact with the first wire on the side opposite the winding core portion as viewed from the first wire is defined as a specific location, one revolution of the second wire wound from the specific location toward the second flange side is defined as a specific turn, when the second wire is traced from the end on the first flange side to the second flange side, a location where the second wire first comes into contact with the outer peripheral surface of the winding core portion is defined as 0 turns of the second winding portion, and the number of turns increases by one for each revolution around the central axis toward the second flange side, In the second step, the second wire is wound so that the specific location is located within a range of 0.5 turn or more and less than 1 turn of the second winding portion, and the second wire crosses the first wire twice within the range of the specific turn. A manufacturing method for coil components.

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