Coil component

Abstract

Provided is a coil component in which the difference in the number of turns between a first wire and a second wire that are in contact with each other is changed without occupying the space as much as possible in the direction along the central axis. An m-th turn (m is a positive integer) and an (m + 1)-th turn of the first wire have a portion belonging to the first layer, and an n-th turn (n is an integer of m + 2 or more) of the first wire has a first portion belonging to the second layer and wound from the outside toward a pit portion between the m-th turn and the (m + 1)-th turn of the first wire in a direction orthogonal to the central axis. In addition, the second wire has at least one or more turns wound adjacent to the first portion on the first flange portion side in the direction along the central axis X, and at least one or more turns wound with respect to the first portion on the second flange portion 31 side. The a-th turn (where a is an integer of 2 or more) of the second wire has a second portion belonging to the third layer.

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 winding core, a first flange, and a second flange. The winding core is in the shape of a quadrangular prism. The first flange is connected to the first end of the winding core. The second flange is connected to the second end of the winding core. In addition, the coil component includes four external electrodes, a first wire, and a second wire. Two of the four external electrodes are located on the surface of the first flange. The remaining two external electrodes are located on the surface of the second flange.

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

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

[0005] In the coil component described in Patent Document 1, stray capacitance may be generated at the portion where the wires are in contact with each other. In addition, the greater the difference in the number of turns between the first wire and the second wire at the contact portion, the greater the stray capacitance. In the coil component described in Patent Document 1, in order to change the difference in the number of turns between the first wire and the second wire that form contact, the second wire and the first wire have a portion that forms an intersection. However, in the coil component described in Patent Document 1, in order to make the wires cross, a larger space is required near the intersection in the direction along the central axis. Therefore, it is desirable to design a design that does not occupy as much space as possible in the direction along the central axis and changes the difference in the number of turns between the first wire and the second wire that form contact. Summary of the Invention

[0006] In order to solve the above-mentioned problems, the present invention is a coil component comprising: a winding core; a first flange portion, which is arranged at a first end of the winding core portion in a direction along the central axis; a second flange portion, which is arranged at a second end of the winding core portion on the opposite side of the first end; a first external electrode and a second external electrode, which are arranged on the first flange portion; a third external electrode and a fourth external electrode, which are arranged on the second flange portion; a first wire rod, which is wound around the winding core portion, with the first end and the first external electrode being aligned with each other. The first end of the second wire is connected to the second electrode, and the second end is connected to the third external electrode; and a second wire is wound on the winding core in the same direction as the first wire, with the first end connected to the second external electrode and the second end connected to the fourth external electrode. With respect to the first wire and the second wire, the number of turns increases by one turn each time the first wire and the second wire are wound around the central axis from the first end toward the second end side. The portion directly wound on the winding core is regarded as the first layer, and the portion wound in a direction perpendicular to the central axis is regarded as the first layer. When the portion wound upward from the outside of the above-mentioned first layer is used as the second layer, and the portion wound from the outside of the above-mentioned second layer in a direction perpendicular to the above-mentioned central axis is used as the third layer, the m-th turn (where m is a positive integer) and the (m+1)-th turn of the above-mentioned first wire rod have portions belonging to the above-mentioned first layer, the n-th turn (where n is an integer greater than or equal to m+2) of the above-mentioned first wire rod has a first portion, and the above-mentioned first portion belongs to the above-mentioned second layer and is wound from the outside toward the recessed portion between the m-th turn and the (m+1)-th turn of the above-mentioned first wire rod in a direction perpendicular to the above-mentioned central axis, the above-mentioned second wire rod has at least one turn wound on the first flange portion side relative to the above-mentioned first portion in a direction along the above-mentioned central axis, and has at least one turn wound on the second flange portion side relative to the above-mentioned first portion in a direction along the above-mentioned central axis, and the a-th turn (where a is an integer greater than or equal to 2) of the above-mentioned second wire rod has a second portion belonging to the above-mentioned third layer.

[0007] According to the above configuration, the space occupied in the direction along the central axis of the winding core can be minimized, and the difference in the number of turns between the first wire rod and the second wire rod in contact can be changed. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0009] Figure 2 This is a schematic end view showing a portion of the coil component according to the first embodiment, which includes the central axis and is perpendicular to the left-right axis.

[0010] Figure 3 This is a schematic end view showing a portion of the coil component according to the second embodiment, which includes the central axis and is perpendicular to the left-right axis.

[0011] Figure 4 It is a schematic end view of a part of a coil member according to a modification example, showing a portion including the central axis and perpendicular to the left-right axis.

[0012] Figure 5 It is a schematic end view of a part of a coil member according to a modification example, showing a portion including the central axis and perpendicular to the left-right axis.

[0013] Figure 6 It is a schematic end view of a part of a coil member according to a modification example, showing a portion including the central axis and perpendicular to the left-right axis.

[0014] Figure 7 This is a schematic end view of a portion of a coil component according to a modified example, showing a portion including the central axis and perpendicular to the left-right axis.

[0015] Description of Reference Numerals

[0016] L1...1st layer; L2...2nd layer; L3...3rd layer; X...center axis; 10...coil component; 11...winding core; 21...1st flange; 31...2nd flange; 41...1st external electrode; 42...2nd external electrode; 43...3rd external electrode; 44...4th external electrode; 50...1st wire; 60...2nd wire; 71...1st part; 72...2nd part; 73...3rd part; 74...4th part; 75...5th part. DETAILED DESCRIPTION

[0017] The following describes the first and second embodiments of the coil component with reference to the accompanying drawings. In some cases, the accompanying drawings show enlarged components for easier understanding. The dimensional ratios of the components may differ from the actual dimensions or from the components in other drawings.

[0018] (First embodiment)

[0019] Regarding the overall structure

[0020] like Figure 1 As shown, the coil component 10 includes a drum-shaped core 10C and a plate-shaped core 10F.

[0021] The drum-shaped core 10C includes a winding core portion 11 , a first flange portion 21 , and a second flange portion 31 .

[0022] The winding core 11 has a quadrangular prism shape and is made of, for example, Ni—Zn ferrite.

[0023] 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.

[0024] Here, a specific axis perpendicular to the central axis X is referred to as the upper and lower axis Y. In the first embodiment, the upper and lower axis Y is a direction perpendicular to the mounting surface when the coil component 10 is mounted on the substrate. In addition, when viewed in the direction along the central axis X, the upper and lower axis Y is parallel to the short side of the core portion 11. In addition, an axis perpendicular to both the central axis X and the upper and lower axis Y is referred to as the left and right axis Z. In the first embodiment, when viewed in the direction along the central axis X, the left and right axis Z is parallel to the long side of the core portion 11. Furthermore, one direction along the central axis X is referred to as the positive direction X1, and the direction opposite to the positive direction X1 is referred to as the negative direction X2. In the first embodiment, the positive direction X1 coincides with the direction from the core portion 11 toward the first flange portion 21. The negative direction X2 coincides with the direction from the core portion 11 toward the second flange portion 31. In addition, one direction along the upper and lower axis Y is referred to as the upper direction Y1, and the direction opposite to the upper direction Y1 is referred to as the lower direction Y2. Furthermore, one direction 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 terms "upper direction Y1" and "lower direction Y2" are used for convenience and are not intended to define the direction of gravity. Furthermore, the terms "right direction Z1" and "left direction Z2" are used for convenience and do not define left and right directions from a specific viewpoint.

[0025] 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. The term "upper surface" need not necessarily be perpendicular to the upper direction Y1. For example, the surface visible when viewing the coil component 10 from the upper direction Y1 toward the lower direction Y2 relative to the coil component 10 is referred to as the "upper surface of the coil component 10." The same applies to the lower surface.

[0026] When viewed in a direction along the central axis X, the first flange portion 21 protrudes outward relative to the winding core 11 in directions along the vertical axis Y and the horizontal axis Z. The first flange portion 21 has a plane-symmetrical shape with respect to an imaginary plane containing the central axis X and orthogonal to the horizontal axis Z.

[0027] The first flange portion 21 includes a main body portion 22 and a recessed portion 23. The main body portion 22 is a generally rectangular parallelepiped with a relatively thin thickness along the center axis X. When viewed in the negative direction X2, the main body portion 22 has two edges on the upper Y1 side and the lower Y2 side parallel to the horizontal axis Z. Furthermore, when viewed in the negative direction X2, the main body portion 22 has two edges on the left Z2 side and the right Z1 side parallel to the vertical axis Y.

[0028] The recessed portion 23 is recessed from the upper surface of the main body 22 toward the downward direction Y2. The dimension of the recessed portion 23 along the left-right axis Z decreases as the area toward the downward direction Y2 increases. The recessed portion 23 is located approximately at the center of the main body 22 along the left-right axis Z. The dimension of the recessed portion 23 along the central axis X is the same as the dimension of the main body 22 along the central axis X. In other words, the portion of the first flange 21 on the upper side in the direction Y1 is bifurcated into two branches separated by the recessed portion 23.

[0029] The second flange portion 31 and the first flange portion 21 are symmetrically shaped relative to an imaginary plane passing through the center of the core portion 11 and perpendicular to the central axis X. That is, when viewed from the direction along the central axis X, the second flange portion 31 protrudes outward relative to the core portion 11 in the direction along the vertical axis Y and the direction along the horizontal axis Z. Moreover, the second flange portion 31 has a main body portion 32 and a recessed portion 33. The structures of the main body portion 32 and the recessed portion 33 of the second flange portion 31 are the same as those of the main body portion 22 and the recessed portion 23 of the first flange portion 21. That is, the recessed portion 33 is recessed from the upper surface of the main body portion 32 toward the lower direction Y2 side.

[0030] 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. Relative to the drum-shaped core 10C, the plate-like core 10F is located on the lower side in the direction Y2. The plate-like core 10F is connected to both the lower surface of the first flange portion 21 and the lower surface of 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-shaped core 10C.

[0031] 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 .

[0032] The first external electrode 41 is provided on the first flange portion 21. That is, the first external electrode 41 is attached to the surface of the first flange portion 21. The first external electrode 41 is located on the surface of the first flange portion 21 on the upper side in the direction Y1 and on the left side in the direction Z2 relative to the recessed portion 23.

[0033] The second external electrode 42 is provided on the first flange portion 21. That is, the second external electrode 42 is attached to the surface of the first flange portion 21. The second external electrode 42 is located on the surface of the first flange portion 21 on the upper side in the direction Y1 and on the right side in the direction Z1 relative to the recessed portion 23.

[0034] The third external electrode 43 is provided on the second flange portion 31. That is, the third external electrode 43 is attached to the surface of the second flange portion 31. The third external electrode 43 is located on the surface of the second flange portion 31 on the upper side in the direction Y1 and on the left side in the direction Z2 relative to the recessed portion 33.

[0035] The fourth external electrode 44 is provided on the second flange portion 31. That is, the fourth external electrode 44 is attached to the surface of the second flange portion 31. The fourth external electrode 44 is located on the surface of the second flange portion 31 on the upper side in the direction Y1 and on the right side in the direction Z1 relative to the recessed portion 33.

[0036] Although not shown in the figure, these first external electrodes 41 to fourth external electrodes 44 have a metal layer and a plating layer. The metal layer is, for example, a layer whose main component is silver. The plating layer is composed of a plurality of layers such as a layer whose main component is copper, a layer whose main component is nickel, and a layer whose main component is tin. In this embodiment, the surface of the coil component 10 on which the first external electrodes 41 to fourth external electrodes 44 are provided is the surface facing the substrate when the coil component 10 is mounted on the substrate. In addition, Figure 1 In FIG. 1 , the first to fourth external electrodes 41 to 44 are shown by dashed-dotted lines.

[0037] <Structure of the first and second wires>

[0038] like Figure 1 As shown in FIG, the coil component 10 includes a first wire 50 and a second wire 60. The first wire 50 and the second wire 60 have portions wound around the winding core 11. Figure 1 , the winding structure of the portion of the first wire 50 and the second wire 60 wound around the winding core 11 is simplified and illustrated as a cylindrical object in which turns of each wire are integrated.

[0039] Although not shown in the figure, the first wire 50 includes a conductive wire and an insulating coating. The insulating coating covers the outer surface of the conductive wire. The first wire 50 has a generally circular shape 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 opposite to the first end 51. In each figure, the first wire 50 is colored with dots.

[0040] like Figure 1As shown, the first end 51 of the first wire 50 is connected to the first external electrode 41. The second end 52 of the first wire 50 is connected to the third external electrode 43. Here, the portion where the first wire 50 first comes into contact with the outer peripheral surface of the winding core 11 as the first wire 50 travels from the first end 51 to the second end 52 is referred to as the 1.0-turn portion of the first wire 50. In the first embodiment, the 1.0-turn portion 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.

[0041] like Figure 2 As shown, regarding the first wire 50, it is considered that the number of turns of the first wire 50 increases by one turn each time it is wound around the center axis X from the first end 51 toward the second end 52. The first wire 50 is wound on the winding core 11, and when viewed in the negative direction X2, the first wire 50 is made to move in a clockwise direction as the number of turns increases. Therefore, for example, when viewed in the negative direction X2, the portion that moves 36 degrees from the 1.0 turn portion of the first wire 50 with the center axis X as the center is the 1.1 turn portion of the first wire 50. In addition, the 1st turn of the first wire 50 represents the portion from the 1.0 turn portion of the first wire 50 to the front of the 2.0 turn portion. In addition, Figures 2 to 7 In the diagram, as long as it is within the range of the first turn, any part in the first turn is shown as "1". The same applies to other numbers of turns. Figure 2 The number of turns shown may not correspond to the number of turns counted from the start of the winding during manufacture.

[0042] like Figure 1 As shown, the second wire 60 has the same structure as the first wire 50. Specifically, the second wire 60 comprises a conductive wire and an insulating coating. The insulating coating covers the outer surface of the conductive wire. The second wire 60 has a generally circular shape in a cross-section perpendicular to the direction in which the second wire 60 extends. The second wire 60 has a first end 61 and a second end 62 opposite the first end 61.

[0043] like Figure 1 As shown, the first end 61 of the second wire 60 is connected to the second external electrode 42. The second end 62 of the second wire 60 is connected to the fourth external electrode 44. Here, the angular position of the second wire 60, centered on the central axis X, where the angular position of the first 1.0 turn portion of the first wire 50 is first aligned with the angular position of the second wire 60 when the second wire 60 travels from the first end 61 to the second end 62 is referred to as the 1.0 turn portion of the second wire 60. That is, in the first embodiment, when viewed in the direction along the central axis X, the 1.0 turn portion of the second wire 60 is located on a straight line connecting the ridgeline of the winding core 11 on the right side in the direction Z1 and on the upper side in the direction Y1 and the central axis X.

[0044] like Figure 2As shown, the number of turns of the second wire 60 increases by one each time the second wire 60 is wound around the central axis X from the first end 61 toward the second end 62. The second wire 60 is wound around the winding core 11 so that it travels in a clockwise direction as the number of turns increases when viewed in the negative direction X2.

[0045] Regarding the first wire 50 and the second wire 60, the portion directly wound on the winding core 11 is referred to as the first layer L1. Here, "directly wound" includes not only a state in which the wire is in contact with the outer peripheral surface of the winding core 11, but also a state in which the wire is floating relative to the winding core 11 but is wound without other wires being sandwiched between the wire and the winding core 11.

[0046] The first and second wires 50 and 60 are wound from outside in a direction perpendicular to the central axis X around a recessed portion formed by two adjacent turns of the first layer L1 along the central axis X, forming the second layer L2.

[0047] Furthermore, the first and second wires 50 and 60 are wound from outside in a direction perpendicular to the central axis X around the recessed portion of the second layer L2 formed by two adjacent turns along the central axis X, forming the third layer L3.

[0048] <Regarding the Winding Method of the Wire Rod in the First Embodiment>

[0049] like Figure 2 As shown, the first wire 50 has a portion belonging to the first layer L1 midway between the first and ninth turns. The first wire 50 is wound sequentially from the first to the ninth turn so that as the number of turns increases, the portion is located closer to the second flange portion 31 in the direction along the center axis X. Furthermore, each turn of the first wire 50 from the first to the ninth turn is wound adjacent to each other in the direction along the center axis X. Here, "adjacent winding" is not limited to the case where adjacent turns of the wire are in contact with each other. Even if adjacent turns of the wire are not in contact with each other, if no other wire exists on the line segment connecting the center axes of the adjacent wires when viewed in cross-section, they can be said to be adjacent.

[0050] The 10th turn of the first wire 50 includes a first portion 71 belonging to the second layer L2. Specifically, in a direction perpendicular to the central axis X, the first portion 71 is wound from the outside toward the concave portion between the 8th and 9th turns of the first wire 50. Therefore, the helical pitch of the first wire 50 becomes negative in the section from the 9th to the 10th turn. Thus, when n is 10 and m is 8 (n=m+2), the nth turn of the first wire 50 includes a first portion 71 wound from the outside toward the concave portion between the mth and (m+1)th turns of the first wire 50 in a direction perpendicular to the central axis X. Furthermore, the portion of the first portion 71 that reaches the second layer L2 does not need to be exactly at 10.0 turns. For example, the portion of the first portion 71 that reaches the second layer L2 may be located after 10.0 turns. In this case, the portion of the 10th turn of the first wire 50, including the portion of turn 10.0, may belong to the first layer L1. Alternatively, the portion of the 11th turn of the first wire 50, including the portion of turn 11.0, may belong to the second layer L2. In this case, the portion of the 11th turn of the first wire 50 may also belong to the second layer L2. Alternatively, the portion of the first wire 50 closer to the front than turn 10.0, may also belong to the second layer L2, continuing from the first portion 71. In this case, the portion of the 9th turn of the first wire 50 may also belong to the second layer L2.

[0051] The 11th turn of the first wire 50 has a portion belonging to the first layer L1. The 11th turn of the first wire 50 is wound adjacent to the 9th turn of the first wire 50 on the second flange portion 31 side along the direction of the central axis X. Therefore, the spiral pitch of the first wire 50 is larger in the portion from the 10th turn to the 11th turn than in other portions.

[0052] Furthermore, the 12th through 15th turns of the first wire 50 belong to the first layer L1. The 12th turn of the first wire 50 is wound adjacent to the 11th turn of the first wire 50 on the second flange portion 31 side along the central axis X. The 12th through 15th turns of the first wire 50 are wound sequentially so that as the number of turns increases, they are positioned closer to the second flange portion 31 side along the central axis X. Furthermore, each of the 12th through 15th turns of the first wire 50 is wound adjacent to each other along the central axis X.

[0053] The 16th turn of the first wire 50 includes a portion wound around the winding core 11 and a portion separated from the winding core 11 and connected to the third external electrode 43. The portion of the 16th turn of the first wire 50 wound around the winding core 11 belongs to the first layer L1. This portion of the 16th turn of the first wire 50 is wound adjacent to the 15th turn of the first wire 50 on the second flange portion 31 side along the central axis X.

[0054] The first turn of the second wire 60 has a portion belonging to the first layer L1 , and this portion is wound adjacent to the first turn of the first wire 50 on the first flange portion 21 side in the direction along the central axis X.

[0055] Furthermore, the second wire 60 from the second turn to the eighth turn belongs to the second layer L2. In addition, there is a case where a part of the second turn of the first wire 50 belongs to the first layer L1.

[0056] The second wire 60 is wound so that as the number of turns increases, it is located closer to the second flange portion 31 in the direction along the central axis X. Each turn of the second wire 60, from the second turn to the eighth turn, is wound adjacently in the direction along the central axis X. Furthermore, in a direction perpendicular to the central axis X, the second turn of the second wire 60 is wound from the outside toward the recessed portion between the first and second turns of the first wire 50. That is, in a direction perpendicular to the central axis X, the i-th turn (where i is an integer from 2 to 8) of the second wire 60 is wound from the outside toward the recessed portion between the (i-1)th turn and the i-th turn of the first wire 50. Furthermore, the eighth turn of the second wire 60 has a portion wound adjacent to the tenth turn of the first wire 50 on the first flange portion 21 side. That is, the eighth turn of the second wire 60 has a portion wound around the first portion 71 on the first flange portion 21 side in the direction along the central axis X. In other words, the second wire 60 has at least one turn wound around the first portion 71 on the first flange portion 21 side in the direction along the central axis X.

[0057] Here, as described above, the more the number of turns of the first wire 50 increases from the 1st turn to the 9th turn, the more it is located on the side of the second flange portion 31 in the direction along the central axis X. Therefore, in the direction along the central axis X, the i-th turn of the second wire 60 wound at the recessed portion between the (i-1)th turn and the i-th turn of the first wire 50 is located on the side of the first flange portion 21 relative to the i-th turn of the first wire 50. That is, when the same turns of the first wire 50 and the second wire 60 are compared, for the turns from the 2nd turn to the 8th turn, the second wire 60 is located on the side of the first flange portion 21 relative to the same turn of the first wire 50 in the direction along the central axis X. In addition, "the second wire 60 is located on the side of the first flange portion 21 relative to the first wire 50" means that Figure 2 Thus, when each wire rod is viewed in cross section, the center of each turn of the second wire rod 60 is located on the first flange portion 21 side relative to the center of each turn of the first wire rod 50 in the direction along the central axis X.

[0058] The 9th turn of the second wire 60 has a second portion 72 belonging to the third layer L3. Specifically, in a direction perpendicular to the central axis X, the second portion 72 is wound from the outside toward the recessed portion between the 8th turn of the second wire 60 and the 10th turn of the first wire 50. Thus, when a is 9, the ath turn of the second wire 60 has a second portion 72 belonging to the third layer L3. Alternatively, a portion of the 9th turn of the second wire 60 may also belong to the second layer L2. Furthermore, a portion of the 8th turn of the second wire 60 may also belong to the third layer L3.

[0059] The 10th turn of the second wire 60 includes a portion belonging to the second layer L2. Specifically, the 10th turn of the second wire 60 includes a portion wound from the outside toward the recessed portion between the 9th and 11th turns of the first wire 50 in a direction perpendicular to the central axis X. Furthermore, this portion is wound adjacent to the 10th turn of the first wire 50 on the second flange 31 side along the central axis X. In other words, the 10th turn of the second wire 60 includes a portion wound on the second flange 31 side along the central axis X relative to the first portion 71. In other words, the second wire 60 includes at least one turn wound on the second flange 31 side along the central axis X relative to the first portion 71.

[0060] The second wire 60, from the 11th turn to the midpoint of the 15th turn, belongs to the second layer L2. The second wire 60, from the 11th turn to the midpoint of the 15th turn, is wound sequentially so that as the number of turns increases, it is located closer to the second flange portion 31 in the direction along the central axis X. Each turn of the second wire 60, from the 11th turn to the midpoint of the 15th turn, is wound adjacently in the direction along the central axis X. Furthermore, in a direction perpendicular to the central axis X, the 11th turn of the second wire 60 is wound from the outside toward the recessed portion between the 11th and 12th turns of the first wire 50. That is, in a direction perpendicular to the central axis X, the second wire 60, from the midpoint of the jth turn (where j is an integer between 11 and 15), is wound from the outside toward the recessed portion between the jth and (j+1)th turns of the first wire 50.

[0061] Here, as described above, the first wire 50 is wound in sequence from the 11th turn to the 15th turn, and as the number of turns increases, the first wire 50 is located closer to the second flange portion 31 in the direction along the central axis X. Therefore, in the direction along the central axis X, the jth turn of the second wire 60 wound at the recessed portion between the jth turn and the (j+1)th turn of the first wire 50 is located closer to the second flange portion 31 relative to the jth turn of the first wire 50. That is, when the same turns of the first wire 50 and the second wire 60 are compared, for the turns from the 11th turn to the 15th turn, the first wire 50 is located closer to the first flange portion 21 relative to the same turn of the second wire 60 in the direction along the central axis X. In addition, "the first wire 50 is located closer to the first flange portion 21 relative to the second wire 60" means that Figure 2 Thus, when each wire rod is viewed in cross section, the center of each turn of the second wire rod 60 is located on the second flange portion 31 side relative to the center of each turn of the first wire rod 50 .

[0062] The remaining portion of the 15th turn of the second wire 60, specifically, the portion of the 15th turn including the portion wound on the upper surface of the winding core 11, belongs to the first layer L1. That is, the 15th turn of the second wire 60 includes a portion wound on the second layer L2 and a portion wound on the first layer L1. This portion of the 15th turn of the second wire 60 is wound adjacent to the 15th turn of the first wire 50 on the second flange 31 side in the direction along the central axis X.

[0063] The 16th turn of the second wire 60 includes a portion wound around the winding core 11 and a portion separated from the winding core 11 and connected to the fourth external electrode 44. The portion of the 16th turn of the second wire 60 wound around the winding core 11 belongs to the first layer L1. This portion of the 16th turn of the second wire 60 is wound adjacent to the 16th turn of the first wire 50 on the second flange 31 side along the central axis X. That is, after the 11th turn of the second wire 60, the first wire 50 is located on the first flange 21 side relative to the same turn of the second wire 60 along the central axis X. Furthermore, as the number of turns of the second wire 60 increases from the first end 61 to the second end 62, the second wire 60 is located closer to the second flange 31 side along the central axis X. In addition, “the more the number of turns increases, the closer the second wire 60 is to the second flange portion 31 in the direction along the central axis X” means that Figure 2 When each wire rod is viewed in cross section, the center of each turn of the second wire rod 60 in the direction along the central axis X is located on the second flange portion 31 side relative to the center of each turn preceding the second wire rod 60 .

[0064] <About Stray Capacitance in the First Embodiment>

[0065] The following describes a case where substantially the same positive voltage is applied to the first end 51 of the first wire 50 and the first end 61 of the second wire 60 , and a ground voltage as a reference voltage is applied to the second end 52 of the first wire 50 and the second end 62 of the second wire 60 .

[0066] For each turn of the second wire 60 that contacts each turn of the first wire 50, the greater the difference in the number of turns, the greater the stray capacitance generated between adjacent turns of each wire. Figure 2 As shown, the turns of the second wire 60 that are in contact with the first turn of the first wire 50 are the first and second turns. In this case, it can be said that there is no significant potential difference between the first turn of the first wire 50 and the first turn of the second wire 60. On the other hand, if the potential of the first turn of the first wire 50 is compared with the potential of the second turn of the second wire 60, it can be said that the potential of the first turn of the first wire 50 is greater. Therefore, a stray capacitance corresponding to this potential difference is generated between the first turn of the first wire 50 and the first turn of the second wire 60.

[0067] Here, when the turns of the first wire 50 and the turns of the second wire 60 in contact are compared, the stray capacitance generated due to the potential of the first wire 50 being higher than the potential of the second wire 60 by one turn is taken as the positive unit capacitance A. Specifically, the stray capacitance generated between the k-th turn (k is a positive integer) of the first wire 50 and the (k+1)-th turn of the second wire 60 in contact therewith is taken as one positive unit capacitance A. In this case, the stray capacitance generated between the k-th turn of the first wire 50 and the (k+2)-th turn of the second wire 60 in contact therewith is two positive unit capacitances A.

[0068] When unit capacitance A is defined as described above, when comparing the turns of the first wire 50 and the turns of the second wire 60 in contact, the stray capacitance generated by the potential of the second wire 60 being higher than that of the first wire 50 by one turn is a negative unit capacitance B. Negative unit capacitance B has the same absolute value as positive unit capacitance A but with the opposite sign. Specifically, the stray capacitance generated between the kth turn of the second wire 60 and the (k+1)th turn of the first wire 50 in contact is one negative unit capacitance B. Furthermore, the stray capacitance generated between the kth turn of the second wire 60 and the (k+2)th turn of the first wire 50 in contact is two negative unit capacitances B.

[0069] In the first embodiment, the coil component 10 has eight positive unit capacitances A and eight negative unit capacitances B. Therefore, when viewing the coil component 10 as a whole, the positive stray capacitance and the negative stray capacitance have approximately the same value. In other words, the stray capacitance generated by the high potential of the first wire 50 and the stray capacitance generated by the high potential of the second wire 60 are of the same magnitude.

[0070] <Effects of the First Embodiment>

[0071] (1-1) In the first embodiment, the (m+2)th turn of the first wire 50 includes a first portion 71 that is wound from the outside toward the recessed portion between the mth and (m+1)th turns of the first wire 50 in a direction perpendicular to the central axis X. That is, the (m+2)th turn of the first wire 50 is wound back around the (m+1)th turn. Thus, the second wire 60 is wound across the portion of the first wire 50 where the first wire 50 is wound back, and thus the difference in the number of turns between the first wire 50 and the second wire 60 that are in contact before and after the second wire 60 crosses over the first wire 50 changes.

[0072] Specifically, in the first embodiment, the seventh turn of the second wire 60 has portions in contact with the sixth and seventh turns of the first wire 50. Thus, for a portion having fewer turns than the first portion 71, the (i-1)th and (i+1)th turns of the first wire 50 have portions in contact with the i-th turn of the second wire 60. Furthermore, the 11th turn of the second wire 60 has portions in contact with the 11th and 12th turns of the first wire 50. For a portion having more turns than the first portion 71, the jth and (j+1)th turns of the first wire 50 have portions in contact with the jth turn of the second wire 60. In this way, the difference in the number of turns between the first wire 50 and the second wire 60 in contact before and after the first portion 71 changes.

[0073] Furthermore, in the first embodiment, the first wire 50 includes the first portion 71. This reduces the space for winding the first wire 50 in the direction along the central axis X, compared to a configuration in which the entire first wire 50 belongs to the first layer L1. Furthermore, in the first embodiment, the second wire 60 includes the second portion 72. This reduces the space for winding the second wire 60 in the direction along the central axis X, compared to a configuration in which the entire second wire 60 belongs to the first layer L1 and the second layer L2. Thus, with this configuration, the space between the wires in the direction along the central axis X can be reduced, and the difference in the number of turns between the first and second wires 50, 60 in contact can be varied.

[0074] (1-2) In the first embodiment, the m-th turn of the second wire 60 is located closer to the first flange 21 than the m-th turn of the first wire 50 along the center axis X. On the other hand, the n-th turn of the second wire 60 is located closer to the second flange 31 than the n-th turn of the first wire 50 along the center axis X. That is, when comparing the front-to-back relationship of the same turn of each wire, the front-to-back relationship is reversed between the m-th and n-th turns. This configuration allows the sign of the stray capacitance to be altered between the turns before and after the m-th turn of the second wire 60.

[0075] (1-3) In the first embodiment, when comparing the same turns of the first wire 50 and the second wire 60, for the turns from the second turn to the (m-1)th turn, 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. When comparing the same turns of the first wire 50 and the second wire 60, for the turns from the (n+1)th turn onward, the first wire 50 is located on the first flange portion 21 side relative to the same turn of the second wire 60 in the direction along the central axis X. With this configuration, the signs of the stray capacitances of the first wire 50 and the second wire 60 are reversed only in the portion from the mth turn to the nth turn. Thus, for the coil component 10 as a whole, the stray capacitance generated in the turns larger than the nth turn can offset at least a portion of the stray capacitance generated in the turns smaller than the mth turn.

[0076] (1-4) In the first embodiment, as the number of turns increases along the second wire 60 from the first end 61 to the second end 62, the second wire 60 is positioned closer to the second flange portion 31 along the direction along the central axis X. In other words, the second wire 60 is wound from the second flange portion 31 side toward the first flange portion 21 side without rewinding along the direction along the central axis X. Compared to a configuration in which the second wire 60 has a rewinding portion, this configuration provides a more stable winding pattern for the second wire 60.

[0077] (1-5) In the first embodiment, the stray capacitance generated by the high potential of the first wire 50 is approximately equal to the stray capacitance generated by the high potential of the second wire 60. Therefore, when viewed in the entire coil component 10, the stray capacitance is well balanced.

[0078] (Second embodiment)

[0079] The following describes a second embodiment of a coil component. In the coil component of the second embodiment, the basic structure of the drum core 10C, plate core 10F, first wire 50, the basic structure of the second wire 60, and the structure of the first to fourth external electrodes 41 to 44 are the same as those of the first embodiment described above. The following describes the winding method of the first and second wires 50 and 60, which differ from the first embodiment.

[0080] <Wire Rod Winding Method in Second Embodiment>

[0081] like Figure 3 As shown, the first wire 50 has a portion belonging to the first layer L1 midway between the first and seventh turns. Furthermore, the first wire 50 is wound sequentially midway between the first and seventh turns such that as the number of turns increases, the portion is positioned closer to the second flange portion 31 in the direction along the central axis X. Furthermore, the turns of the first wire 50 midway between the first and seventh turns are wound adjacent to each other in the direction along the central axis X.

[0082] The eighth turn of the first wire 50 includes a first portion 71 that belongs to the second layer L2. Specifically, in a direction perpendicular to the central axis X, the first portion 71 is wound from the outside toward the recessed portion between the sixth and seventh turns of the first wire 50. Thus, when n is 8 and m is 6 (n=m+2), the nth turn of the first wire 50 includes a first portion 71 that is wound from the outside toward the recessed portion between the mth and (m+1)th turns of the first wire 50 in a direction perpendicular to the central axis X. Alternatively, a portion of the eighth turn of the first wire 50 may belong to the first layer L1.

[0083] The ninth turn of the first wire 50 has a portion belonging to the first layer L1. This portion is wound adjacent to the seventh turn of the first wire 50 on the second flange portion 31 side in the direction along the central axis X. Alternatively, a portion of the ninth turn of the first wire 50 may also belong to the second layer L2.

[0084] The 10th turn of the first wire 50 includes a third portion 73 belonging to the second layer L2. Specifically, the third portion 73 is wound from the outside toward the recessed portion between the 7th and 9th turns of the first wire 50 in a direction perpendicular to the central axis X. That is, the (m+4)th turn of the first wire 50 includes a third portion 73 belonging to the second layer L2 and wound from the outside toward the recessed portion between the (m+1)th and (m+3)th turns of the first wire 50 in a direction perpendicular to the central axis X. Alternatively, a portion of the 10th turn of the first wire 50 may also belong to the first layer L1. The structure of the 11th and subsequent turns of the first wire 50 is the same as that of the first embodiment.

[0085] The first turn of the second wire 60 has a portion belonging to the first layer L1 . In the direction along the central axis X, this portion is wound adjacent to the first turn of the first wire 50 on the first flange portion 21 side.

[0086] Furthermore, the second wire 60, from the second turn to the sixth turn, belongs to the second layer L2. Alternatively, a portion of the second turn of the second wire 60 may belong to the first layer L1. The second wire 60 is wound sequentially from the second turn to the sixth turn, so that as the number of turns increases, it is located closer to the second flange portion 31 along the central axis X. Along the central axis X, the turns of the second wire 60, from the second turn to the sixth turn, are wound adjacent to each other. Furthermore, in a direction perpendicular to the central axis X, the second turn of the second wire 60 is wound from the outside toward the recessed portion between the first and second turns of the first wire 50. That is, in a direction perpendicular to the central axis X, the i-th turn (where i is an integer greater than or equal to 2 and less than or equal to 6) of the second wire 60 is wound from the outside toward the recessed portion between the (i-1)th turn and the i-th turn of the first wire 50. Furthermore, the sixth turn of the second wire 60 has a portion wound adjacent to the eighth turn of the first wire 50 on the first flange portion 21 side. That is, the sixth turn of the second wire 60 has a portion wound relative to the first portion 71 on the first flange portion 21 side in the direction along the central axis X. In other words, the second wire 60 has at least one turn wound relative to the first portion 71 on the first flange portion 21 side in the direction along the central axis X.

[0087] Here, as described above, the first wire 50 is wound sequentially from the first to the seventh turn, so that as the number of turns increases, the wire 50 is positioned closer to the second flange portion 31 in the direction along the central axis X. Therefore, along the central axis X, the i-th turn of the second wire 60, wound in the recessed portion between the (i-1)th and i-th turns of the first wire 50, is positioned closer to the first flange portion 21 relative to the i-th turn of the first wire 50. That is, when comparing the same turns of the first and second wires 50, for the turns from the second to the sixth turn, the second wire 60 is positioned closer to the first flange portion 21 relative to the same turn of the first wire 50 in the direction along the central axis X. The term "the second wire 60 is positioned closer to the first flange portion 21 relative to the first wire 50" is defined the same as in the first embodiment.

[0088] The seventh turn of the second wire 60 includes a second portion 72 belonging to the third layer L3. Specifically, in a direction perpendicular to the central axis X, the second portion 72 is wound from the outside toward the recessed portion between the fifth and sixth turns of the second wire 60. Thus, when a is set to 7, the ath turn of the second wire 60 includes a second portion 72 belonging to the third layer L3. Alternatively, a portion of the seventh turn of the second wire 60 may also belong to the second layer L2. Furthermore, a portion of the sixth turn of the second wire 60 may also belong to the third layer L3.

[0089] The eighth turn of the second wire 60 includes a fourth portion 74 belonging to the third layer L3. Specifically, the fourth portion 74 is wound from the outside toward the recessed portion between the sixth turn of the second wire 60 and the eighth turn of the first wire 50 in a direction perpendicular to the central axis X. In the second embodiment, the entire eighth turn of the second wire 60 constitutes the fourth portion 74. That is, the (m+2)th turn of the second wire 60 includes a fourth portion 74 belonging to the third layer L3 and wound from the outside toward the recessed portion between the mth turn of the second wire 60 and the (m+2)th turn of the first wire 50 in a direction perpendicular to the central axis X.

[0090] The 9th turn of the second wire 60 has a fifth portion 75 belonging to the third layer L3. Specifically, in a direction perpendicular to the central axis X, the fifth portion 75 is wound from the outside toward the recessed portion between the 8th and 10th turns of the first wire 50. In other words, the (m+3)th turn of the second wire 60 has a fifth portion 75 belonging to the third layer L3 and wound from the outside toward the recessed portion between the (m+2)th and (m+4)th turns of the first wire 50 in a direction perpendicular to the central axis X. Furthermore, there are cases where a portion of the 9th turn of the second wire 60 belongs to the second layer L2.

[0091] The tenth turn of the second wire 60 is wound adjacent to the third portion 73 on the second flange 31 side in the direction along the central axis X. That is, the tenth turn of the second wire 60 includes a portion wound relative to the first portion 71 on the second flange 31 side in the direction along the central axis X. In other words, the second wire 60 has at least one turn wound relative to the first portion 71 on the second flange 31 side in the direction along the central axis X. The structure of the second wire 60 after the tenth turn is the same as that of the first embodiment.

[0092] <Effects of the Second Embodiment>

[0093] In the second embodiment, in addition to the same effects as the effects (1-1) and (1-5) of the first embodiment described above, the following effects can be further obtained.

[0094] (2-1) In the second embodiment, the first wire 50 climbs onto the second layer L2 at two locations: the first portion 71 and the third portion 73. With this configuration, the space for winding the first wire 50 along the direction of the central axis X is further reduced compared to a configuration in which the entire first wire 50 belongs to the first layer L1. Furthermore, in the above configuration, the second wire 60 climbs onto the third layer L3 at three locations: the second portion 72, the fourth portion 74, and the fifth portion 75. Consequently, the space for winding the second wire 60 along the direction of the central axis X is further reduced compared to a configuration in which the entire second wire 60 belongs to both the first layer L1 and the second layer L2.

[0095] (2-2) In the second embodiment, the mth turn of the second wire 60 is located closer to the first flange 21 than the mth turn of the first wire 50 in the direction along the central axis X. Furthermore, the (m+4)th turn of the second wire 60 is located closer to the second flange 31 than the (m+4)th turn of the first wire 50 in the direction along the central axis X. That is, when comparing the front-to-back relationship of the same turn of each wire, the front-to-back relationship is reversed from the nth turn to the (m+4)th turn. With this configuration, the sign of the stray capacitance can be altered between the turns before the mth turn and the turns after the (m+4)th turn of the second wire 60.

[0096] <Change Example>

[0097] The first embodiment and the second embodiment can be implemented with modifications as follows: The first embodiment, the second embodiment, and the following modifications can be implemented in combination within a range that does not technically conflict.

[0098] In the first and second 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 planar core 10F. Furthermore, the shape of the planar core 10F is not limited to a rectangular plate. For example, the planar core 10F may also be an elliptical plate.

[0099] In the first and second 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 may be a polygonal prism other than a quadrangular prism.

[0100] In the first and second embodiments, the materials of the drum-shaped core 10C and the plate-shaped core 10F are not limited to those in the above-described 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, etc. 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.

[0101] In the first and second embodiments, the structure of the drum core 10C is not limited to that of the aforementioned embodiments. For example, the first flange portion 21 may not include the recessed portion 23. In this case, for example, the first external electrode 41 and the second external electrode 42 may be separated from each other. This also applies to the second flange portion 31.

[0102] In the first and second embodiments, the materials and shapes of the first to fourth external electrodes 41 to 44 are not limited to those described in the respective embodiments. For example, the plating layer of the first to fourth external electrodes 41 to 44 may be a single conductive layer. Alternatively, the first to fourth external electrodes 41 to 44 may not have a plating layer, and the conductive metal layer may be exposed. Furthermore, for example, the first to fourth external electrodes 41 to 44 may be formed of a plate-shaped metal material.

[0103] In the first and second embodiments, the cross-sectional shapes of the first and second wire members 50 and 60 are not limited to those in the above embodiments. For example, the cross-sectional shapes of the first and second wire members 50 and 60 may be elliptical or rectangular.

[0104] In the first and second embodiments, the total number of turns of the first wire 50 is not limited to that of the above-described embodiment. In this regard, the total number of turns of the second wire 60 is also the same. Furthermore, the total number of turns of the first wire 50 and the total number of turns of the second wire 60 may be different.

[0105] In the first and second embodiments, the length of the first portion 71, which is the portion of the n-th turn of the first wire 50 wound from the outside in a direction perpendicular to the central axis X toward the recessed portion between the m-th and (m+1)-th turns of the first wire 50, is arbitrary. However, it is desirable to ensure a sufficient length for the first portion 71, and preferably, the first portion 71 is wound about 0.5 turns or more toward the recessed portion between the m-th and (m+1)-th turns of the first wire 50. This also applies to the second to fifth portions 72 to 75.

[0106] In the first and second embodiments, m is a positive integer. If n is an integer greater than or equal to m+2, the numbers of m and n are not limited to those in the above embodiments. Also, if a is an integer greater than or equal to 2, the number of a is not limited to those in the above embodiments.

[0107] In the first and second embodiments, if the mth and (m+1)th turns of the first wire 50 belong to the first layer L1, the number of turns belonging to the first layer L1 and the number of turns are not limited. Furthermore, if the nth turn of the first wire 50 includes a first portion 71 wound from the outside toward the recessed portion between the mth and (m+1)th turns of the first wire 50 in a direction perpendicular to the central axis X, the number of turns belonging to the second layer L2 and the number of turns are not limited. Furthermore, if the ath turn of the second wire 60 includes a second portion 72 belonging to the third layer L3, the number of turns belonging to the third layer L3 and the number of turns are not limited. That is, if the portion of the second wire 60 wound in the third layer L3 is at least one turn, the number of turns belonging to the third layer L3 and the number of turns are not limited.

[0108] In the first and second embodiments, if the second wire 60 has at least one or more turns wound around the first portion 71 on the first flange portion 21 side in the direction along the central axis X, the number of turns of the second wire 60 wound around the first portion 71 on the first flange portion 21 side in the direction along the central axis X is not limited to the examples in the above-described embodiments. Furthermore, if the second wire 60 has at least one or more turns wound adjacent to the first portion 71 on the second flange portion 31 side in the direction along the central axis X, the number of turns of the second wire 60 wound around the first portion 71 on the second flange portion 31 side in the direction along the central axis X is not limited to the examples in the above-described embodiments.

[0109] In the first and second embodiments, in the turns from the second to the (m-1)th, the second wire 60 may be 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. Furthermore, in the turns from the (n+1)th and later, the first wire 50 may be located on the first flange portion 21 side relative to the same turn of the second wire 60 in the direction along the central axis X.

[0110] In the first embodiment, when the second wire 60 is advanced from the first end 61 to the second end 62, all turns of the second wire 60 may not be arranged such that the number of turns increases as the number of turns increases, and the turns are located closer to the second flange portion 31 in the direction along the central axis X. At least the portion of the second wire 60 that continuously belongs to the second layer L2 may be arranged such that the number of turns increases as the number of turns increases, and the turns are located closer to the second flange portion 31 in the direction along the central axis X. However, the present invention is not limited to this, and in the first embodiment, the second wire 60 may not be arranged such that the number of turns of the second wire 60 increases as the number of turns increases, and the turns are located closer to the second flange portion 31 in the direction along the central axis X.

[0111] In the first embodiment, the m-th turn of the second wire 60 may be located closer to the first flange portion 21 than the m-th turn of the first wire 50 in the direction along the central axis X, and the n-th turn of the second wire 60 may be located closer to the first flange portion 21 than the n-th turn of the first wire 50 in the direction along the central axis X. For example, in the first embodiment, the 10th turn of the second wire 60 may be wound around the recessed portion between the 9th turn of the second wire 60 and the 10th turn of the second wire 60. Furthermore, the m-th turn of the second wire 60 may be located closer to the second flange portion 31 than the m-th turn of the first wire 50 in the direction along the central axis X, and the n-th turn of the second wire 60 may be located closer to the second flange portion 31 than the n-th turn of the first wire 50 in the direction along the central axis X.

[0112] In the second embodiment, the m-th turn of the second wire rod 60 may be located closer to the first flange portion 21 than the m-th turn of the first wire rod 50 in the direction along the central axis X, and the (m+4)-th turn of the second wire rod 60 may be located closer to the first flange portion 21 than the (m+4)-th turn of the first wire rod 50 in the direction along the central axis X. Furthermore, the m-th turn of the second wire rod 60 may be located closer to the second flange portion 31 than the m-th turn of the first wire rod 50 in the direction along the central axis X, and the (m+4)-th turn of the second wire rod 60 may be located closer to the second flange portion 31 than the (m+4)-th turn of the first wire rod 50 in the direction along the central axis X.

[0113] In the first embodiment, the second portion 72 is not limited to the ninth turn of the second wire 60. Figure 4 In the example shown, the first wire 50 from the first turn to the eleventh turn belongs to the first layer L1. Furthermore, the first wire 50 is wound sequentially from the first turn to the eleventh turn so that as the number of turns increases, it is positioned closer to the second flange portion 31 in the direction along the central axis X. Furthermore, in the direction along the central axis X, the first wire 50 from the first turn to the eleventh turn is wound adjacent to each other.

[0114] In this example, the 12th turn of the first wire 50 includes a first portion 71 belonging to the second layer L2. Specifically, the 12th turn of the first wire 50 includes the first portion 71 wound from the outside toward the recessed portion between the 10th and 11th turns of the first wire 50 in a direction perpendicular to the central axis X. Thus, when n is 12 and m is 10 (n=m+2), the nth turn of the first wire 50 includes the first portion 71 wound from the outside toward the recessed portion between the mth and (m+1)th turns of the first wire 50 in a direction perpendicular to the central axis X. Alternatively, a portion of the 12th turn of the first wire 50 may also belong to the first layer L1. Furthermore, a portion of the 11th turn of the first wire 50 may also belong to the second layer L2.

[0115] In this example, the 13th turn of the first wire 50 has a portion belonging to the first layer L1. This portion is wound adjacent to the 11th turn of the first wire 50 on the second flange portion 31 side along the central axis X. Alternatively, a portion of the 13th turn of the first wire 50 may also belong to the second layer L2.

[0116] Moreover, the 1st wire 50 has a portion belonging to the 1st layer L1 from the 14th turn to the 17th turn. In the direction along the central axis X, this portion is wound adjacent to the 13th turn of the 1st wire 50 on the side of the 2nd flange portion 31. The 1st wire 50 is wound in sequence from the 14th turn to the 17th turn in such a manner that the more the number of turns increases, the closer it is to the side of the 2nd flange portion 31 in the direction along the central axis X. In addition, in the direction along the central axis X, the turns of the 1st wire 50 from the 14th turn to the 17th turn are wound adjacent to each other. In addition, although not shown in the figure, the 1st wire 50 has the 18th turn, and is led out from the winding core portion 11 in the middle of the 18th turn and is connected to the 3rd external electrode 43. In addition, Figure 4 In the figure, illustration of each wire rod at the lower surface of the winding core portion 11 is omitted.

[0117] In this example, the first turn of the second wire 60 has a portion belonging to the first layer L1. This portion is wound adjacent to the first flange portion 21 relative to the first turn of the first wire 50 in the direction along the central axis X. Alternatively, a portion of the second turn of the first wire 50 may also belong to the first layer L1.

[0118] The second to tenth turns of the second wire 60 belong to the second layer L2. The second to tenth turns of the second wire 60 are wound sequentially so that as the number of turns increases, they are positioned closer to the second flange portion 31 in the direction along the central axis X. In the direction along the central axis X, the second to tenth turns of the second wire 60 are wound adjacent to each other.

[0119] The 11th turn of the second wire 60 includes a portion belonging to the second layer L2. Specifically, in a direction perpendicular to the central axis X, this portion is wound from the outside toward the recessed portion between the 11th and 13th turns of the first wire 50. Furthermore, along the central axis X, this portion is wound adjacent to the 12th turn of the first wire 50 on the second flange 31 side. Furthermore, along the central axis X, this portion is located closer to the second flange 31 side than the 11th turn of the first wire 50. Alternatively, there are cases where, between the 10th and 11th turns of the second wire 60, the second wire 60 temporarily climbs up to the 12th turn of the first wire 50 and belongs to the third layer L3. Because this temporary climb to the third layer L3 occurs only in a small interval, in this disclosure, the 10th to 11th turns of the second wire 60 are sometimes treated as belonging to the second layer L2.

[0120] The 12th turn of the second wire 60 includes a second portion 72 belonging to the third layer L3. Specifically, the second portion 72 includes a portion wound from the outside toward the recessed portion between the 12th turn of the first wire 50 and the 11th turn of the second wire 60 in a direction perpendicular to the central axis X. That is, when a is 12, the ath turn of the second wire 60 includes a second portion 72 belonging to the third layer L3. Alternatively, a portion of the 12th turn of the second wire 60 may include a portion wound from the outside toward the portion of the 10th or 11th turn of the second wire 60 belonging to the third layer L3 and located outside the third layer L3.

[0121] The 13th to 16th turns of the second wire 60 belong to the second layer L2. The 13th to 16th turns of the second wire 60 are wound sequentially so that as the number of turns increases, they are located closer to the second flange portion 31 in the direction along the central axis X. In the direction along the central axis X, the 13th to 16th turns of the second wire 60 are wound adjacent to each other.

[0122] The 17th turn of the second wire 60 is wound in the same manner as the 15th turn of the second wire 60 in the first embodiment. Although not shown, the second wire 60 has an 18th turn, which is drawn out from the winding core 11 midway through the 18th turn and connected to the fourth external electrode 44.

[0123] according to Figure 4 In the example shown, the second portion 72 of the second wire 60 is wound outside the first portion 71 of the first wire 50. Furthermore, the second portion 72 and the first portion 71 form the same turns. Therefore, stray capacitance generated between the first and second wires 50, 60, during these turns can be suppressed.

[0124] In addition, Figure 4In the example shown, the second wire 60 is wound nine turns closer to the first flange 21 than the mth turn along the center axis X, forming a smaller turn than the mth turn. Meanwhile, the second wire 60 is wound approximately five turns closer to the second flange 31 than the nth turn along the center axis X, forming a larger turn than the nth turn. Thus, starting from the vicinity of the second portion 72, the number of turns wound on the first flange 21 side differs from the number of turns wound on the second flange 31 side, making it easier to determine the orientation of the coil component 10 by visually identifying the winding patterns.

[0125] In the first embodiment, the second portion 72 of the second wire 60 is not limited to being wound around the first portion 71 from the outside in a direction perpendicular to the central axis X. Figure 5 In the example shown, the first wire 50 is wound in the same manner as in the first embodiment. Specifically, when n is 10 and m is 8 (n=m+2), the nth turn of the first wire 50 includes a first portion 71 belonging to the second layer L2. The first portion 71 is wound from the outside toward the recessed portion between the mth and (m+1)th turns of the first wire 50 in a direction perpendicular to the central axis X.

[0126] In addition, the second wire 60 is wound from the first turn to the eighth turn in the same manner as in the first embodiment. Figure 5 In the example shown, the 9th turn of the second wire 60 has the second portion 72 belonging to the third layer L3. That is, when a is set to 9, the ath turn of the second wire 60 has the second portion 72 belonging to the third layer L3. The 10th turn and subsequent turns of the second wire 60 are wound in the same manner as in the first embodiment. Figure 5 In the figure, illustration of each wire rod on the lower surface of the winding core portion 11 is omitted.

[0127] As in the first embodiment, when the turns of the first wire 50 and the turns of the second wire 60 that are in contact are compared, the stray capacitance generated by the potential of the first wire 50 being higher than the potential of the second wire 60 by one turn is taken as the positive unit capacitance A. Furthermore, when the turns of the first wire 50 and the turns of the second wire 60 that are in contact are compared, the stray capacitance generated by the potential of the second wire 60 being higher than the potential of the first wire 50 by one turn is taken as the negative unit capacitance B.

[0128] exist Figure 5 In the example shown, the coil component 10 has eight positive unit capacitances A and seven negative unit capacitances B. Therefore, when viewing the coil component 10 as a whole, the positive stray capacitance is greater than the negative stray capacitance by one unit capacitance A. This allows the coil component 10 to be designed so that the stray capacitance generated by the higher potential of the first wire 50 is greater than the stray capacitance generated by the higher potential of the second wire 60.

[0129] Furthermore, the second portion 72 of the second wire 60 is not limited to being wound from the outside relative to the first portion 71 in a direction perpendicular to the central axis X, and may also be Figure 6 The winding method is as shown in the example. Figure 6 In the example shown, the first wire 50 from the first turn to the eighth turn belongs to the first layer L1. Furthermore, the first wire 50 is wound sequentially from the first turn to the eighth turn so that as the number of turns increases, it is positioned closer to the second flange portion 31 in the direction along the central axis X. Furthermore, in the direction along the central axis X, the first wire 50 from the first turn to the eighth turn is wound adjacent to each other.

[0130] In this example, the ninth turn of the first wire 50 includes a first portion 71 belonging to the second layer L2. Specifically, in a direction perpendicular to the central axis X, the first portion 71 is wound from the outside toward the recessed portion between the seventh and eighth turns of the first wire 50. Thus, when n is 9 and m is 7 (n=m+2), the nth turn of the first wire 50 includes a first portion 71 wound from the outside toward the recessed portion between the mth and (m+1)th turns of the first wire 50 in a direction perpendicular to the central axis X. Alternatively, a portion of the ninth turn of the first wire 50 may also belong to the first layer L1. Furthermore, a portion of the eighth turn of the first wire 50 may also belong to the second layer L2.

[0131] In this example, the 10th turn of the first wire 50 belongs to the first layer L1. The 10th turn of the first wire 50 has a portion wound adjacent to the 8th turn of the first wire 50 on the second flange portion 31 side in the direction along the central axis X. Alternatively, a portion of the 10th turn of the first wire 50 may belong to the second layer L2. The 11th turn and subsequent turns of the first wire 50 are wound in the same manner as in the first embodiment.

[0132] In this example, the first to sixth turns of the second wire 60 are wound in the same manner as in the first embodiment. The seventh turn of the second wire 60 belongs to the second layer L2. Furthermore, the seventh turn of the second wire 60 has a portion wound adjacent to the ninth turn of the first wire 50 on the first flange portion 21 side along the central axis X. Alternatively, a portion of the seventh turn of the second wire 60 may belong to the third layer L3.

[0133] The eighth turn of the second wire 60 has the second portion 72 belonging to the third layer L3. That is, when a is 8, the ath turn of the second wire 60 has the second portion 72 belonging to the third layer L3.

[0134] The ninth turn of the second wire 60 has a portion belonging to the second layer L2. Specifically, this portion is wound from the outside toward the recessed portion between the eighth and tenth turns of the first wire 50 in a direction perpendicular to the central axis X. Furthermore, this portion is wound adjacent to the ninth turn of the first wire 50 on the second flange portion 31 side along the central axis X. Alternatively, a portion of the ninth turn of the second wire 60 may belong to the third layer L3.

[0135] The 10th turn of the second wire 60 belongs to the second layer L2. Specifically, the 10th turn of the second wire 60 has a portion wound from the outside toward the concave portion between the 10th and 11th turns of the first wire 50 in a direction perpendicular to the central axis X. In addition, this portion is wound adjacent to the 9th turn of the second wire 60 on the second flange portion 31 side in the direction along the central axis X. Moreover, the 11th turn and subsequent turns of the second wire 60 are wound in the same manner as in the first embodiment. In addition, Figure 6 In the figure, illustration of each wire rod on the lower surface of the winding core portion 11 is omitted.

[0136] As in the first embodiment, when comparing the turns of the first wire 50 and the turns of the second wire 60 that are in contact, the stray capacitance generated by the potential of the first wire 50 being higher than the potential of the second wire 60 by one turn is taken as the positive unit capacitance A. Furthermore, when comparing the turns of the first wire 50 and the turns of the second wire 60 that are in contact, the stray capacitance generated by the potential of the second wire 60 being higher than the potential of the first wire 50 by one turn is taken as the negative unit capacitance B.

[0137] exist Figure 6 In the example shown, the coil component 10 has seven positive unit capacitances A and eight negative unit capacitances B. Therefore, when viewing the coil component 10 as a whole, the negative stray capacitance is greater than the positive stray capacitance by one unit capacitance B. In this way, the coil component 10 can be designed so that the stray capacitance generated by the high potential of the second wire 60 is greater than the stray capacitance generated by the high potential of the first wire 50.

[0138] In the second embodiment, the first portion 71 is not limited to the (m+2)th turn of the first wire 50. For example, Figure 7 In the example shown, the first wire 50 from the first turn to the eighth turn belongs to the first layer L1. Furthermore, the first wire 50 is wound sequentially from the first turn to the eighth turn so that as the number of turns increases, it is positioned closer to the second flange portion 31 in the direction along the central axis X. Furthermore, the turns of the first wire 50 from the first turn to the eighth turn are wound adjacent to each other in the direction along the central axis X. Furthermore, there are cases where a portion of the eighth turn of the first wire 50 belongs to the second layer L2.

[0139] In this example, the ninth turn of the first wire 50 includes a first portion 71 belonging to the second layer L2. Specifically, the first portion 71 is wound from the outside toward the recessed portion between the sixth and seventh turns of the first wire 50 in a direction perpendicular to the central axis X. Thus, when n is 9 and m is 6 (n=m+3), the nth turn of the first wire 50 includes the first portion 71 wound from the outside toward the recessed portion between the mth and (m+1)th turns of the first wire 50 in a direction perpendicular to the central axis X.

[0140] The 10th turn of the first wire 50 includes a third portion 73 belonging to the second layer L2. Specifically, the third portion 73 is wound from the outside toward the recessed portion between the 7th and 8th turns of the first wire 50 in a direction perpendicular to the central axis X. That is, the (m+4)th turn of the first wire 50 includes a third portion 73 belonging to the second layer L2 and wound from the outside toward the recessed portion between the (m+1)th and (m+2)th turns of the first wire 50 in a direction perpendicular to the central axis X. The 11th and subsequent turns of the first wire 50 are the same as those of the second embodiment.

[0141] The first to seventh turns of the second wire 60 are the same as those of the second embodiment. The eighth turn of the second wire 60 includes a fourth portion 74 belonging to the third layer L3. Specifically, the fourth portion 74 is wound from the outside toward the recessed portion between the sixth turn of the second wire 60 and the ninth turn of the first wire 50 in a direction perpendicular to the central axis X. In the second embodiment, the entire eighth turn of the second wire 60 constitutes the fourth portion 74. That is, the (m+2)th turn of the second wire 60 includes a fourth portion 74 belonging to the third layer L3 and wound from the outside toward the recessed portion between the mth turn of the second wire 60 and the (m+3)th turn of the first wire 50 in a direction perpendicular to the central axis X.

[0142] The 9th turn of the second wire 60 includes a fifth portion 75 belonging to the third layer L3. Specifically, the fifth portion 75 is wound from the outside toward the recessed portion between the 9th and 10th turns of the first wire 50 in a direction perpendicular to the central axis X. That is, the (m+3)th turn of the second wire 60 includes a fifth portion 75 belonging to the third layer L3 and wound from the outside toward the recessed portion between the (m+3)th and (m+4)th turns of the first wire 50 in a direction perpendicular to the central axis X.

[0143] The 10th turn of the second wire 60 belongs to the second layer L2. Specifically, the 10th turn of the second wire 60 has a portion wound from the outside toward the recessed portion between the 8th and 11th turns of the first wire 50 in a direction perpendicular to the central axis X. In the direction along the central axis X, this portion is wound adjacent to the 10th turn of the first wire 50 on the side of the second flange portion 31. In addition, there is also a case where a portion of the 10th turn of the second wire 60 belongs to the third layer L3. Moreover, the 11th turn and subsequent turns of the second wire 60 are the same as those in the second embodiment. In addition, Figure 7 In the figure, illustration of each wire rod on the lower surface of the winding core portion 11 is omitted.

[0144] exist Figure 7 In the example shown, the first wire 50 is continuously wound around the first layer L1 from the mth turn to the (m+2)th turn. Furthermore, in the direction along the central axis X, the (m+3)th turn of the first wire 50 is located closer to the first flange portion 21 than the (m+2)th turn. In other words, the first wire 50 is wound back toward the first flange portion 21 from the (m+2)th turn to the (m+3)th turn. With this structure, the mth and (m+1)th turns of the first wire 50 are pressed toward the first flange portion 21 along the central axis X by the winding from the (m+2)th turn to the (m+3)th turn. In other words, from the mth turn to the (m+2)th turn of the first wire 50, adjacent turns are wound in close contact. According to this configuration, it is possible to suppress the fourth portion 74 and the fifth portion 75 of the second wire 60 from falling and moving to the first layer L1 .

[0145] <Note>

[0146] The technical concepts that can be grasped from the above-described embodiments and modifications are described.

[0147] [1] A coil component comprising: a winding core; a first flange provided at a first end of the winding core in a direction along a central axis; a second flange provided at a second end of the winding core opposite to the first end; a first external electrode and a second external electrode provided on the first flange; a third external electrode and a fourth external electrode provided on the second flange; a first wire wound around the winding core, with a first end connected to the first external electrode and a second end connected to the fourth external electrode. The end of the wire is connected to the third external electrode; and a second wire is wound on the winding core in the same direction as the first wire, the first end is connected to the second external electrode, and the second end is connected to the fourth external electrode. With respect to the first wire and the second wire, the number of turns increases by one turn each time the wire is wound around the central axis from the first end toward the second end, and the portion directly wound around the winding core is regarded as the first layer. When the portion wound around the outside of the first layer is used as the second layer, and the portion wound around the outside of the second layer in a direction perpendicular to the central axis is used as the third layer, the mth turn (where m is a positive integer) and the (m+1)th turn of the first wire rod have portions belonging to the first layer, the nth turn (where n is an integer greater than or equal to m+2) of the first wire rod has a first portion, the first portion belonging to the second layer and wound around from the outside toward a recessed portion between the mth turn and the (m+1)th turn of the first wire rod in a direction perpendicular to the central axis, the second wire rod has at least one turn wound around the first portion on the first flange side in a direction along the central axis, and at least one turn wound around the first portion on the second flange side in a direction along the central axis, and the ath turn (where a is an integer greater than or equal to 2) of the second wire rod has a second portion belonging to the third layer.

[0148] [2] In the coil component described in [1], in the direction along the above-mentioned central axis, the mth turn of the above-mentioned second wire is located on the side of the above-mentioned first flange portion more than the mth turn of the above-mentioned first wire, and in the direction along the above-mentioned central axis, the nth turn of the above-mentioned second wire is located on the side of the above-mentioned second flange portion more than the nth turn of the above-mentioned first wire.

[0149] [3] In the coil component described in [1] or [2], when the same turns of the first wire and the second wire are compared, for the turns from the second turn to the (m-1)th turn, the second wire is located on the first flange side relative to the same turn of the first wire in the direction along the center axis, and for the turns after the (n+1)th turn, the first wire is located on the first flange side relative to the same turn of the second wire in the direction along the center axis.

[0150] [4] In the coil component described in any one of [1] to [3], n=m+2, and when moving along the second wire from the first end to the second end, for the portion of the second wire continuously belonging to the second layer, the greater the number of turns, the closer it is located to the second flange portion in the direction along the center axis, the mth turn of the second wire has a portion belonging to the second layer and wound adjacent to the (m+2)th turn of the first wire on the first flange portion side in the direction along the center axis, and the (m+1)th turn of the second wire has the second portion, which is wound from the outside to the recessed portion between the mth turn of the second wire and the (m+2)th turn of the first wire in a direction perpendicular to the center axis.

[0151] [5] In the coil component described in any one of [1] to [3], n=m+2, the (m+1)th turn of the second wire has a portion belonging to the second layer and wound adjacent to the (m+2)th turn of the first wire on the side of the second flange in the direction along the center axis, and the (m+2)th turn of the second wire has the second portion, which is wound from the outside toward the recessed portion between the (m+2)th turn of the first wire and the (m+1)th turn of the second wire in a direction perpendicular to the center axis.

[0152] [6] In the coil component described in any one of [1] to [3], n=m+2, the mth turn of the second wire has a portion belonging to the second layer and wound adjacent to the (m+2)th turn of the first wire on the first flange side in the direction along the center axis, the (m-1)th turn of the second wire has a portion belonging to the second layer and wound adjacent to the mth turn of the second wire on the first flange side in the direction along the center axis, and the (m+1)th turn of the second wire has the second portion, which is located closer to the first flange side than the (m+1)th turn of the first wire in the direction along the center axis and is wound from the outside to the recessed portion between the (m-1)th turn of the second wire and the mth turn of the second wire in a direction perpendicular to the center axis.

[0153] [7] In the coil component described in [1], n=m+2, the (m+3)th turn of the first wire has a portion belonging to the first layer and wound adjacent to the (m+1)th turn of the first wire on the second flange side in the direction along the central axis, the (m+4)th turn of the first wire has a third portion, the third portion belongs to the second layer and is wound from the outside toward the recessed portion between the (m+1)th turn of the first wire and the (m+3)th turn of the first wire in a direction perpendicular to the central axis, the mth turn of the second wire has a portion belonging to the second layer and wound adjacent to the (m+2)th turn of the first wire on the first flange side in the direction along the central axis, the (m-1)th turn of the second wire has a portion belonging to the second layer and wound adjacent to the (m+2)th turn of the first wire on the first flange side in the direction along the central axis. The first flange portion side is a portion wound adjacent to the m-th turn of the second wire rod, the (m+1)-th turn of the second wire rod has the second portion, which is wound from the outside to the recessed portion between the (m-1)-th turn of the second wire rod and the m-th turn of the second wire rod in a direction perpendicular to the center axis, the (m+2)-th turn of the second wire rod has the fourth portion, which belongs to the third layer and is wound from the outside to the recessed portion between the m-th turn of the second wire rod and the (m+2)-th turn of the first wire rod in a direction perpendicular to the center axis, and the (m+3)-th turn of the second wire rod has the fifth portion, which belongs to the third layer and is wound from the outside to the recessed portion between the (m+2)-th turn of the first wire rod and the (m+4)-th turn of the first wire rod in a direction perpendicular to the center axis.

[0154] [8] In the coil component described in [1] or [2], n=m+3, the (m+2)th turn of the first wire has a portion belonging to the first layer and wound adjacent to the (m+1)th turn of the first wire on the side of the second flange in the direction along the central axis, the (m+4)th turn of the first wire has a third portion, the third portion belongs to the second layer and is wound from the outside toward the recessed portion between the (m+1)th turn of the first wire and the (m+2)th turn of the first wire in a direction perpendicular to the central axis, the mth turn of the second wire has a portion belonging to the second layer and wound adjacent to the (m+3)th turn of the first wire on the side of the first flange in the direction along the central axis, the (m-1)th turn of the second wire has a portion belonging to the second layer and wound adjacent to the (m+3)th turn of the first wire on the side of the first flange in the direction along the central axis. In the portion wound adjacent to the mth turn of the second wire rod on the side of the first flange portion, the (m+1)th turn of the second wire rod has the second portion wound from the outside toward the recessed portion between the (m-1)th turn of the second wire rod and the mth turn of the second wire rod in a direction perpendicular to the center axis, the (m+2)th turn of the second wire rod has the fourth portion, which belongs to the third layer and is wound from the outside toward the recessed portion between the mth turn of the second wire rod and the (m+3)th turn of the first wire rod in a direction perpendicular to the center axis, and the (m+3)th turn of the second wire rod has the fifth portion, which belongs to the third layer and is wound from the outside toward the recessed portion between the (m+3)th turn of the first wire rod and the (m+4)th turn of the first wire rod in a direction perpendicular to the center axis.

[0155] [9] In the coil component described in [7] or [8], in the direction along the above-mentioned central axis, the mth turn of the above-mentioned second wire is located on the side of the above-mentioned first flange portion more than the mth turn of the above-mentioned first wire, and in the direction along the above-mentioned central axis, the (m+4)th turn of the above-mentioned second wire is located on the side of the above-mentioned second flange portion more than the (m+4)th turn of the above-mentioned first wire.

Claims

1. A coil component, characterized in that: have: Roll core; a first flange portion provided at a first end of the winding core portion in a direction along the central axis; a second flange portion provided at a second end of the winding core portion on the opposite side to the first end; a first external electrode and a second external electrode, which are provided on the first flange portion; a third external electrode and a fourth external electrode, which are provided on the second flange portion; a first wire material wound around the winding core, having a first end connected to the first external electrode and a second end connected to the third external electrode; and a second wire material wound on the winding core in the same direction as the first wire material, with a first end connected to the second external electrode and a second end connected to the fourth external electrode; Regarding the first wire and the second wire, The number of turns increases by one each time the thread travels from the first end toward the second end around the central axis. The portion directly wound around the core is the first layer. The portion wound from the outside of the first layer in a direction perpendicular to the central axis is formed as the second layer, When the portion wound from the outside of the second layer in a direction perpendicular to the central axis is used as the third layer, The m-th turn and the (m+1)-th turn of the first wire have portions belonging to the first layer, wherein m is a positive integer, The n-th turn of the first wire has a first portion, the first portion belonging to the second layer and wound from the outside toward a recessed portion between the m-th turn and the (m+1)-th turn of the first wire in a direction perpendicular to the central axis, wherein n is an integer greater than or equal to m+2, The second wire rod has at least one turn wound around the first portion on the first flange portion side in the direction along the central axis, and has at least one turn wound around the second flange portion side in the direction along the central axis relative to the first portion. The a-th turn of the second wire has a second portion belonging to the third layer, where a is an integer greater than or equal to 2.

2. The coil component according to claim 1, wherein In the direction along the central axis, the m-th turn of the second wire is located closer to the first flange portion than the m-th turn of the first wire. In the direction along the central axis, the n-th turn of the second wire rod is located closer to the second flange portion than the n-th turn of the first wire rod.

3. The coil component according to claim 1 or 2, characterized in that When the same turns of the first wire and the second wire are compared, for turns from the second turn to the (m-1)th turn, the second wire is located on the first flange side relative to the same turn of the first wire in the direction along the central axis. For the (n+1)th and subsequent turns, the first wire is located on the first flange side relative to the same turn of the second wire in the direction along the central axis.

4. The coil component according to any one of claims 1 to 3, wherein n=m+2, When the second wire rod is advanced from the first end to the second end, the portion of the second wire rod continuously belonging to the second layer is located closer to the second flange portion in the direction along the central axis as the number of turns increases. The m-th turn of the second wire has a portion that belongs to the second layer and is wound adjacent to the (m+2)-th turn of the first wire on the first flange side in the direction along the central axis. The (m+1)th turn of the second wire has the second portion wound from the outside toward the recessed portion between the mth turn of the second wire and the (m+2)th turn of the first wire in a direction perpendicular to the central axis.

5. The coil component according to any one of claims 1 to 3, characterized in that n=m+2, The (m+1)th turn of the second wire rod has a portion that belongs to the second layer and is wound adjacent to the (m+2)th turn of the first wire rod on the second flange portion side in the direction along the central axis. The (m+2)th turn of the second wire rod has the second portion wound from the outside toward the recessed portion between the (m+2)th turn of the first wire rod and the (m+1)th turn of the second wire rod in a direction perpendicular to the central axis.

6. The coil component according to any one of claims 1 to 3, wherein: n=m+2, The m-th turn of the second wire has a portion that belongs to the second layer and is wound adjacent to the (m+2)-th turn of the first wire on the first flange side in the direction along the central axis. The (m-1)th turn of the second wire rod has a portion that belongs to the second layer and is wound adjacent to the mth turn of the second wire rod on the first flange portion side in the direction along the central axis. The (m+1)th turn of the second wire has the second portion, which is located closer to the first flange portion than the (m+1)th turn of the first wire in the direction along the center axis, and is wound from the outside toward the recessed portion between the (m-1)th turn of the second wire and the mth turn of the second wire in a direction perpendicular to the center axis.

7. The coil component according to claim 1, wherein n=m+2, The (m+3)th turn of the first wire rod has a portion that belongs to the first layer and is wound adjacent to the (m+1)th turn of the first wire rod on the second flange portion side in the direction along the central axis. The (m+4)th turn of the first wire has a third portion, the third portion belonging to the second layer and wound from the outside toward a recessed portion between the (m+1)th turn of the first wire and the (m+3)th turn of the first wire in a direction perpendicular to the central axis. The m-th turn of the second wire has a portion that belongs to the second layer and is wound adjacent to the (m+2)-th turn of the first wire on the first flange side in the direction along the central axis. The (m-1)th turn of the second wire rod has a portion that belongs to the second layer and is wound adjacent to the mth turn of the second wire rod on the first flange portion side in the direction along the central axis. The (m+1)th turn of the second wire rod has the second portion wound from the outside toward the recessed portion between the (m-1)th turn of the second wire rod and the mth turn of the second wire rod in a direction perpendicular to the central axis. The (m+2)th turn of the second wire has a fourth portion, the fourth portion belonging to the third layer and wound from the outside toward a recessed portion between the mth turn of the second wire and the (m+2)th turn of the first wire in a direction perpendicular to the central axis. The (m+3)th turn of the second wire has a fifth portion, which belongs to the third layer and is wound from the outside toward the recessed portion between the (m+2)th turn of the first wire and the (m+4)th turn of the first wire in a direction perpendicular to the center axis.

8. The coil component according to claim 1 or 2, characterized in that: n=m+3, The (m+2)th turn of the first wire rod has a portion that belongs to the first layer and is wound adjacent to the (m+1)th turn of the first wire rod on the second flange portion side in the direction along the central axis. The (m+4)th turn of the first wire has a third portion, the third portion belonging to the second layer and wound from the outside toward a recessed portion between the (m+1)th turn of the first wire and the (m+2)th turn of the first wire in a direction perpendicular to the central axis. The m-th turn of the second wire rod has a portion that belongs to the second layer and is wound adjacent to the (m+3)-th turn of the first wire rod on the first flange portion side in the direction along the central axis. The (m-1)th turn of the second wire rod has a portion that belongs to the second layer and is wound adjacent to the mth turn of the second wire rod on the first flange portion side in the direction along the central axis. The (m+1)th turn of the second wire rod has the second portion wound from the outside toward the recessed portion between the (m-1)th turn of the second wire rod and the mth turn of the second wire rod in a direction perpendicular to the central axis. The (m+2)th turn of the second wire has a fourth portion, the fourth portion belonging to the third layer and wound from the outside toward a recessed portion between the mth turn of the second wire and the (m+3)th turn of the first wire in a direction perpendicular to the central axis. The (m+3)th turn of the second wire has a fifth portion, which belongs to the third layer and is wound from the outside toward the recessed portion between the (m+3)th turn of the first wire and the (m+4)th turn of the first wire in a direction perpendicular to the center axis.

9. The coil component according to claim 7 or 8, characterized in that: In the direction along the central axis, the m-th turn of the second wire is located closer to the first flange portion than the m-th turn of the first wire. In the direction along the central axis, the (m+4)th turn of the second wire rod is located closer to the second flange portion than the (m+4)th turn of the first wire rod.

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