Coil component

Abstract

The invention relates to a coil component which suppresses melting of an insulating film on a crossing part. A coil component (10) is provided with: a drum-shaped core (10C) having a winding core section (11), a first flange section (21), and a second flange section (22); a first external electrode (31); a second external electrode (32); a third external electrode (33); a fourth external electrode (34); a first wire (41); and a second wire (42). The N-th turn includes a portion that is in contact with the outer peripheral surface of the winding core section (11) at the end of the first wire (41) from the first wire end (41A) to the second wire end (41B). The M-th turn is a turn including a portion that is in final contact with the outer peripheral surface of the winding core section (11) from the first wire end (42A) to the second wire end (42B) along the second wire (42). At this time, the M-th turn of the second wire (42) and the N-th turn of the first wire (41) do not have a crossing portion that intersects each other. The (M-1) th turn of the second wire (42) and the (N-1) th turn of the first wire (41) have a first intersection portion (51) that intersects each other.

Description

Technical Field

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

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

[0003] The first wire is wound on 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 on 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 in the same direction as the first wire.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2023-30170

[0005] In the coil component described in Patent Document 1, there is a case where each wire crosses near the second end. If each wire crosses near the second end, heat from the external electrode is transferred to the intersection of the wires, and heat is easily concentrated in the intersection. Therefore, if each wire crosses near the second end, it is easy to cause the insulation coating on the intersection of the wires to melt. Summary of the invention

[0006] In order to solve the above-mentioned problems, the present invention is a coil component, comprising: a drum core having a columnar winding core portion, and a first flange portion and a second flange portion, wherein the first flange portion is connected to a first end of the winding core portion in a direction along the central axis, and the second flange portion is connected to 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 located on the surface of the first flange portion; a third external electrode and a fourth external electrode, which are located on the surface of the second flange portion; a first wire rod, which is wound around the winding core portion, wherein a first wire end is connected to the first external electrode, and a second wire end is connected to the third external electrode; and a second wire rod, which is wound around the winding core portion in the same direction as the first wire rod, wherein a first wire end is connected to the second external electrode, and a second wire end is connected to the fourth external electrode, wherein N and M are set to integers greater than 2, and a portion that first contacts the outer peripheral surface of the winding core portion when the first wire rod is moved from the first wire end to the second wire end is set to a portion of 1.0 turn of the first wire rod, and a portion from the first wire end to the second wire end is set to a portion from the first wire end to the fourth wire end. The number of turns of the first wire end of the wire increases by one turn each time it is wound around the central axis toward the second wire end, and the turn included in the portion that contacts the outer peripheral surface of the winding core portion last when the first wire end is extended from the first wire end to the second wire end is set as the Nth turn, and the portion where the angular position centered on the central axis coincides with the angular position of the portion of 1.0 turn of the first wire for the first time when the second wire end is extended from the first wire end to the second wire end is set as the portion of 1.0 turn of the second wire, and In order to increase the number of turns by one for each winding around the central axis from the first wire end of the second wire toward the second wire end side, the turn included in the portion that finally contacts the outer peripheral surface of the winding core portion when walking along the second wire from the first wire end to the second wire end is set as the Mth turn. At this time, the Mth turn of the second wire and the Nth turn of the first wire do not have an intersection portion that intersects with each other, and the (M-1)th turn of the second wire and the (N-1)th turn of the first wire have a first intersection portion that intersects with each other.

[0007] According to the above configuration, it is possible to suppress melting of the insulating coating at the first intersection. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a three-dimensional diagram of the coil component.

[0009] Figure 2 It is a top view of the coil component.

[0010] Figure 3 This is a diagram for explaining the winding state of the wire when the coil component is viewed in the third negative direction.

[0011] Figure 4This is a diagram for explaining the winding state of the wire material when the coil component is viewed in the second positive direction.

[0012] Figure 5 This is a diagram for explaining the winding state of the wire material when the coil component according to the modification example is viewed toward the second positive direction.

[0013] Figure 6 It is a top view of the coil component.

[0014] Figure 7 This is a diagram for explaining the winding pattern of the wire material when the coil component is viewed in the third negative direction.

[0015] Figure 8 This is a diagram for explaining the winding state of the wire material when the coil component is viewed in the second positive direction. DETAILED DESCRIPTION

[0016] The first and second embodiments of the coil component are described below. In addition, the drawings may show the components in an enlarged manner for easy understanding. The dimensional ratios of the components may be different from the actual dimensional ratios or the dimensional ratios in other drawings.

[0017] <Regarding the Coil Component of the First Embodiment>

[0018] (About the overall structure)

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

[0020] The drum core 10C includes a winding core portion 11 , a first flange portion 21 , and a second flange portion 22 .

[0021] The winding core 11 is in the shape of a quadrangular prism. The cross section of the winding core 11 perpendicular to the central axis 11C is a rectangle. In addition, the "rectangle" mentioned here only needs to have four sides and be a rectangle as a whole, and also includes a shape in which the corners of the rectangle are chamfered. The material of the winding core 11 is Ni-Zn ferrite in the first embodiment. In addition, the material of the winding core 11 can be set to, for example, alumina, Ni-Zn ferrite, synthetic resin, and a mixture thereof.

[0022] Here, a specific axis parallel to the central axis 11C of the winding core 11 is set as the first axis X. An axis orthogonal to the first axis X is set as the second axis Y. In the first embodiment, when viewed in the direction along the first axis X, the second axis Y is parallel to two of the four sides of the winding core 11. In addition, an axis orthogonal to both the first axis X and the second axis Y is set as the third axis Z. In the first embodiment, when viewed in the direction along the first axis X, the third axis Z is parallel to the remaining two of the four sides of the winding core 11. Moreover, one of the directions along the first axis X is set as the first positive direction X1, and the opposite direction of the first positive direction X1 is set as the first negative direction X2. Similarly, one of the directions along the second axis Y is set as the second positive direction Y1, and the opposite direction of the second positive direction Y1 is set as the second negative direction Y2. In addition, one of the directions along the third axis Z is set as the third positive direction Z1, and the opposite direction of the third positive direction Z1 is set as the third negative direction Z2. In addition, in the first embodiment, the specific direction orthogonal to the central axis 11C coincides with the third positive direction Z1.

[0023] like Figure 1 As shown, the first flange 21 is connected to the first end of the winding core 11 in the first positive direction X1. The first flange 21 is integrally formed with the winding core 11. Therefore, the first flange 21 is made of the same Ni—Zn ferrite as the winding core 11.

[0024] The first flange portion 21 protrudes outward relative to the winding core portion 11 in the direction along the second axis Y and the direction along the third axis Z. In addition, a portion 21A in the center of the first flange portion 21 in the direction along the second axis Y protrudes in the third positive direction Z1 relative to both ends in the direction along the second axis Y. In other words, the end portions in the second positive direction Y1 and the end portions in the second negative direction Y2 of the first flange portion 21 are recessed in the third negative direction Z2 relative to the portion 21A in the center of the first flange portion 21 in the direction along the second axis Y.

[0025] The second flange 22 is connected to the second end of the winding core 11 on the first negative direction X2 side. The second flange 22 is integrally formed with the winding core 11. Therefore, the second flange 22 is made of the same Ni—Zn ferrite as the winding core 11.

[0026] The second flange portion 22 protrudes outward relative to the winding core portion 11 in the direction along the second axis Y and in the direction along the third axis Z. In addition, a portion 22A in the center of the second flange portion 22 in the direction along the second axis Y protrudes in the third positive direction Z1 relative to both ends in the direction along the second axis Y. In other words, the end portions in the second positive direction Y1 and the end portions in the second negative direction Y2 of the second flange portion 22 are recessed in the third negative direction Z2 relative to the portion 22A in the center of the second flange portion 22 in the direction along the second axis Y.

[0027] The top plate 10F is in the shape of a rectangular plate. The dimension of the third axis Z of the top plate 10F is smaller than the dimension along the direction of the first axis X and the dimension along the direction of the second axis Y. The long side of the top plate 10F is parallel to the first axis X. The short side of the top plate 10F is parallel to the second axis Y. The top plate 10F is located on the third negative direction Z2 side relative to the drum core 10C. The top plate 10F is connected to both the surface of the first flange portion 21 facing the third negative direction Z2 and the surface of the second flange portion 22 facing the third negative direction Z2. That is, the top plate 10F is mounted between the first flange portion 21 and the second flange portion 22. The material of the top plate 10F is the same Ni-Zn ferrite as that of the drum core 10C. In addition, Figure 3 to Figure 5 In the figure, the top plate 10F is omitted.

[0028] The coil component 10 includes four external electrodes 30 . The four external electrodes 30 are a first external electrode 31 , a second external electrode 32 , a third external electrode 33 , and a fourth external electrode 34 .

[0029] The first external electrode 31 is attached to the first flange portion 21. The first external electrode 31 is located on a surface of the first flange portion 21 that is closer to the second positive direction Y1 relative to the center in the direction along the second axis Y. In addition, most of the first external electrode 31 is located on the third positive direction Z1 side relative to the winding core portion 11.

[0030] The first external electrode 31 has a bonding portion BP, a connecting portion CP, and a joining portion JP. The bonding portion BP, the connecting portion CP, and the joining portion JP are integrally formed. That is, there is no clear boundary between these components inside the first external electrode 31.

[0031] The bonding part BP is roughly plate-shaped. When the bonding part BP is observed along the direction of the second axis Y, the bonding part BP is roughly L-shaped. That is, the bonding part BP has a surface orthogonal to the first axis X and a surface orthogonal to the third axis Z. A portion of the surface orthogonal to the first axis X in the bonding part BP is bonded to the surface on the first positive direction X1 side of the first flange part 21.

[0032] The connecting portion CP is roughly plate-shaped. The connecting portion CP is connected to the end surface of the bonding portion BP on the second positive direction Y1 side. The connecting portion CP extends toward the second positive direction Y1 as it moves toward the third negative direction Z2. Moreover, when viewed from the direction along the first axis X, the bonding portion BP is roughly L-shaped. Therefore, the connecting portion CP has a surface orthogonal to the second axis Y and a surface orthogonal to the third axis Z.

[0033] The joint JP is roughly plate-shaped. The joint JP is connected to the end face on the second positive direction Y1 side of the connection portion CP. The joint JP is located on the surface of the first flange portion 21 facing the third positive direction Z1. That is, the joint JP is located on the surface of the first flange portion 21 on the third positive direction Z1 side relative to the center axis 11C. The wire end of the wire described later is connected to the surface of the joint JP on the third positive direction Z1 side. In this way, if the joint JP connecting the wire end is located on the surface of the first flange portion 21 on the third positive direction Z1 side relative to the center axis 11C, it can be said that the first external electrode 31 is located on the surface of the first flange portion 21 on the third positive direction Z1 side relative to the center axis 11C.

[0034] The second external electrode 32 is mounted on the first flange portion 21. The second external electrode 32 is located on the surface of the first flange portion 21 on the second negative direction Y2 side relative to the center in the direction along the second axis Y. Most of the second external electrode 32 is located on the third positive direction Z1 side relative to the winding core portion 11. The second external electrode 32 is symmetrically shaped relative to the first external electrode 31. Specifically, the second external electrode 32 and the first external electrode 31 are symmetrical about a virtual plane passing through the central axis 11C and orthogonal to the second axis Y. Therefore, the second external electrode 32 is located on the surface of the first flange portion 21 on the third positive direction Z1 side relative to the central axis 11C.

[0035] The third external electrode 33 is mounted on the second flange portion 22. The third external electrode 33 is located on the surface of the second flange portion 22 on the second positive direction Y1 side relative to the center of the direction along the second axis Y. Most of the third external electrode 33 is located on the third positive direction Z1 side relative to the winding core portion 11. The third external electrode 33 is symmetrically shaped relative to the first external electrode 31. Specifically, the third external electrode 33 and the first external electrode 31 are symmetrical about a virtual plane that is orthogonal to the central axis 11C and passes through the geometric center of the winding core portion 11. Therefore, the third external electrode 33 is located on the surface of the second flange portion 22 on the third positive direction Z1 side relative to the central axis 11C.

[0036] The fourth external electrode 34 is mounted on the second flange portion 22. The fourth external electrode 34 is located on the surface of the second flange portion 22 on the second negative direction Y2 side relative to the center of the direction along the second axis Y. Most of the fourth external electrode 34 is located on the third positive direction Z1 side relative to the winding core portion 11. The fourth external electrode 34 is symmetrically shaped with respect to the third external electrode 33. Specifically, the fourth external electrode 34 and the third external electrode 33 are symmetrical with respect to a virtual plane surface passing through the central axis 11C and orthogonal to the second axis Y. Therefore, the fourth external electrode 34 is located on the surface of the second flange portion 22 on the third positive direction Z1 side relative to the central axis 11C.

[0037] In the first embodiment, the maximum dimension of the coil component 10 along the first axis X is 3.2 mm, the maximum dimension of the coil component 10 along the second axis Y is 2.5 mm, and the maximum dimension of the coil component 10 along the third axis Z is 2.3 mm.

[0038] (Regarding the First Wire and the Second Wire)

[0039] like Figure 1 As shown, the coil component 10 includes a first wire 41 and a second wire 42. The first wire 41 and the second wire 42 are wound around the winding core 11. Although not shown in the figure, the first wire 41 has a conductor and an insulating coating. The insulating coating covers the outer surface of the conductor. The first wire 41 is substantially circular in a cross section perpendicular to the direction in which the first wire 41 extends.

[0040] The second wire 42 has the same structure as the first wire 41. That is, the second wire 42 has a conductive wire and an insulating coating. Figure 3 to Figure 5 In FIG. 1 , the first wire 41 is colored with dots.

[0041] like Figure 2 As shown, the first wire end 41A of the first wire 41 is connected to the first external electrode 31. The second wire end 41B of the first wire 41 is connected to the third external electrode 33. The first wire end 41A and the second wire end 41B are connected to the joint portion JP of the corresponding external electrode 30 by thermocompression bonding. In addition, the so-called thermocompression bonding is a method of sandwiching the wire between the external electrode 30 and a heated jig to melt the wire and fix it to the external electrode 30.

[0042] Here, when the first wire 41 is moved from the first wire end 41A to the second wire end 41B, the portion that first contacts the outer peripheral surface of the winding core 11 is set to the portion of 1.0 turn of the first wire 41. In the first embodiment, the portion of 1.0 turn of the first wire 41 is located on the ridgeline of the winding core 11 on the second negative direction Y2 side and the third positive direction Z1 side.

[0043] like Figure 3 as well as Figure 4 As shown, the number of turns increases by one turn each time the first wire 41 is wound around the central axis 11C from the first wire end 41A toward the second wire end 41B. The first wire 41 is wound around the winding core 11 so that when viewed in the first negative direction X2, it moves clockwise as the number of turns increases. Therefore, for example, when viewed in the first negative direction X2, the portion that moves 36 degrees from the portion of the 1.0 turn of the first wire 41 around the central axis 11C is the portion of the 1.1 turn of the first wire 41. In addition, Figure 3, the number of turns of each wire at the ridgeline position on the third positive direction Z1 side of the winding core 11 is schematically illustrated. Figure 4 , the number of turns of each wire located on the central axis 11C of the winding core 11 when viewed in the second positive direction Y1 is schematically illustrated.

[0044] like Figure 3 As shown, the first wire 41 is directly wound around the winding core 11 without the second wire 42 in the entire circumference. Here, the so-called direct winding includes not only a state of contact with the outer peripheral surface of the winding core 11, but also a state of winding without other wires between the winding core 11 even if the wire is floating.

[0045] In addition, the first turn of the first wire 41 represents the section from the 1.0 turn portion to the 2.0 turn portion of the first wire 41. This is also the same for the second wire 42. Figure 3 as well as Figure 4 In the figure, a portion of each wire located closer to the first wire end than 1.0 turn is shown as 0 turn.

[0046] like Figure 2 As shown, the first end 42A of the second wire 42 is connected to the second external electrode 32. The second end 42B of the second wire 42 is connected to the fourth external electrode 34. The first end 42A and the second end 42B are connected to the joint portion JP of the corresponding external electrode 30 by thermocompression bonding.

[0047] Here, when the second wire 42 is extended from the first wire end 42A to the second wire end 42B, the portion whose angular position centered on the central axis 11C coincides with the angular position of the portion of 1.0 turn of the first wire 41 for the first time is set as the portion of 1.0 turn of the second wire 42. That is, in the first embodiment, when viewed in the direction along the first axis X, the portion of 1.0 turn of the second wire 42 is located on a straight line connecting the ridgeline on the second negative direction Y2 side and the third positive direction Z1 side of the winding core 11 and the central axis 11C. In the first embodiment, when the second wire 42 is extended from the first wire end 42A to the second wire end 42B, the portion of 1.0 turn of the second wire 42 contacts the outer peripheral surface of the first wire 41 on the opposite side of the surface facing the central axis 11C. In addition, the portion of 1.0 turn of the second wire 42 may contact the outer peripheral surface of the winding core 11.

[0048] like Figure 3 as well as Figure 4As shown, the number of turns increases by one turn for each turn from the first wire end 42A of the second wire 42 toward the second wire end 42B with the central axis 11C as the center. The second wire 42 is wound on the winding core 11 so that when viewed toward the first negative direction X2, it moves clockwise as the number of turns increases. That is, the second wire 42 is wound in the same direction as the first wire 41. Moreover, a portion of the second wire 42 is wound on the winding core 11 from the outside relative to the first wire 41. In other words, a portion of the second wire 42 contacts the outer peripheral surface of the first wire 41 on the opposite side of the surface facing the central axis 11C.

[0049] (About the intersection of the first wire and the second wire)

[0050] In the following description, N and M are set to integers greater than 2. The turns included in the portion that contacts the outer peripheral surface of the winding core 11 last when the first wire 41 is extended from the first wire end 41A to the second wire end 41B are referred to as the Nth turns. In addition, the turns included in the portion that contacts the outer peripheral surface of the winding core 11 last when the second wire 42 is extended from the first wire end 42A to the second wire end 42B are referred to as the Mth turns.

[0051] At this time, the Mth turn of the second wire 42 and the Nth turn of the first wire 41 do not have an intersection portion that intersects with each other. On the other hand, the (M-1)th turn of the second wire 42 and the (N-1)th turn of the first wire 41 have a first intersection portion 51 that intersects with each other. The "intersection" mentioned here means that when the wire on one side is moved from the first end to the second end, the wire on the one side that is located on the same layer as the wire on the other side is temporarily placed on the outer peripheral side of the other wire and reaches the same layer as the wire on the other side again. Specifically, the (M-1)th turn of the second wire 42 has a first intersection portion 51 that intersects with the (N-1)th turn of the first wire 41. When the second wire 42 is moved from the first end 42A to the second end 42B, at the first intersection portion 51, in the direction along the center axis 11C, the second wire 42 crosses the first wire 41 from the first negative direction X2 side to the first positive direction X1 side. In addition, in the present embodiment, as Figure 2 As shown, when viewed in a direction orthogonal to the central axis 11C of the winding core 11, the portion where the center line of the second wire 42 intersects the center line of the first wire 41 is referred to as the "intersection portion". In addition, here, it is explained that "the center line of the second wire 42 intersects the center line of the first wire 41", but this has the same meaning as "the center line of the first wire 41 intersects the center line of the second wire 42".

[0052] like Figure 3 as well as Figure 4As shown, in the first embodiment, N is 30. M is 30. That is, the 30th turn of the second wire 42 does not cross the 30th turn of the first wire 41. Moreover, the 29th turn of the second wire 42 crosses the 29th turn of the first wire 41. In addition, the 29.0th turn of the second wire 42 contacts the outer peripheral surface of the winding core 11 without sandwiching the first wire 41. Therefore, at the first intersection 51, the second wire 42 is placed on the first wire 41 in the middle of the turn wound on the outer periphery of the winding core 11 and crosses the first wire 41.

[0053] The second wire 42 has a first outer peripheral winding portion 61 , a second outer peripheral winding portion 62 , and an inner peripheral winding portion 63 .

[0054] The first outer peripheral winding portion 61 is wound over a plurality of turns on the outer peripheral side of the first wire 41. The first outer peripheral winding portion 61 is located on the first wire end 42A side of the second wire 42 with respect to the first intersection 51. Specifically, the first outer peripheral winding portion 61 is a section from the first turn to the thirteenth turn of the second wire 42.

[0055] The second outer peripheral winding portion 62 is located on the second wire end 42B side of the second wire 42 relative to the first outer peripheral winding portion 61, and is located on the first wire end 42A side of the second wire 42 relative to the first intersection 51. The second outer peripheral winding portion 62 is wound over a plurality of turns on the outer peripheral side relative to the first wire 41. Specifically, the second outer peripheral winding portion 62 is the section from the 17th turn to the 27th turn of the second wire 42.

[0056] The second peripheral winding portion 62 has a first transverse portion 52 that crosses the first wire 41 on the side close to the first wire end 42A relative to the first intersection portion 51. The "transverse" mentioned here means that the wire on one side does not reach the same layer as the wire on the other side but crosses over the wire on the other side. That is, the second peripheral winding portion 62 has a first transverse portion 52 that crosses over the first wire 41 without reaching the same layer as the first wire 41. In this way, due to the existence of the first transverse portion 52, the second peripheral winding portion 62 has a portion in contact with the Xth turn of the first wire 41, a portion in contact with the X+1th turn, and a portion in contact with the X+2th turn (X is a positive integer) within the range of one turn. Figure 3As shown, in the first embodiment, at the position of 23.0 turns of the second wire 42, the second wire 42 is located between the 21st turn and the 22nd turn of the first wire 41. On the other hand, at the position of 24.0 turns of the second wire 42, the second wire 42 is located between the 24th turn and the 25th turn of the first wire 41. That is, the 23rd turn of the second wire 42 in the upper layer has a contact position for each of the 22nd turn, the 23rd turn, and the 24th turn of the first wire 41. Here, the groove formed between two adjacent turns of the wire is set as the valley of the wire. At this time, the 23rd turn of the second wire 42 covers the two valleys of the first wire 41 in the direction along the central axis 11C.

[0057] When the second wire 42 is passed from the first wire end 42A to the second wire end 42B, the second wire 42 crosses over the first wire 41 from the first positive direction X1 side to the first negative direction X2 side at the first transverse portion 52. That is, the direction in which the second wire 42 crosses over the first wire 41 in the direction along the central axis 11C at the first intersection portion 51 is opposite to the direction in which the second wire 42 crosses over the first wire 41 in the direction along the central axis 11C at the first transverse portion 52. In addition, here, in the case where the wire on the upper layer side crosses over the wire on the lower layer side, it is expressed as "the wire on the upper layer side crosses over the wire on the lower layer side". Therefore, for example, "the second wire 42 crosses over the first wire 41" refers to the case where the second wire 42 of the upper layer crosses over the first wire 41 wound on the lower layer.

[0058] The inner peripheral winding portion 63 is located between the first outer peripheral winding portion 61 and the second outer peripheral winding portion 62 in the direction along the central axis 11C. In addition, the inner peripheral winding portion 63 is a winding portion in which at least a portion of the second wire 42 is continuously wound on the outer peripheral surface of the winding core portion 11, and the range of the winding portion continuously wound on the outer peripheral side of the first wire 41 is less than 1.0 turns. Specifically, the inner peripheral winding portion 63 is the interval from the 14th turn to the 16th turn of the second wire 42.

[0059] The inner circumferential winding portion 63 has a second intersection portion 53 intersecting with the first wire 41. That is, the second wire 42 has a second intersection portion 53 intersecting with the first wire 41 on the first end 42A side relative to the first intersection portion 51. The second intersection portion 53 is a portion where the 15th turn of the second wire 42 intersects with the 15th turn of the first wire 41. When the second wire 42 is extended from the first end 42A to the second end 42B, the second wire 42 crosses over the first wire 41 from the first negative direction X2 side to the first positive direction X1 side at the second intersection portion 53. That is, it is assumed that the second wire 42 is extended from the first end 42A to the second end 42B. At this time, the direction in which the second wire 42 crosses over the first wire 41 in the direction along the central axis 11C at the first intersection portion 51 is the same as the direction in which the second wire 42 crosses over the first wire 41 in the direction along the central axis 11C at the second intersection portion 53.

[0060] In this way, the second wire 42 crosses over the first wire 41 at four locations, namely, the first intersection location 51, the two first transverse locations 52, and the second intersection location 53. Moreover, at two of the four locations, when the second wire 42 is extended from the first wire end 42A to the second wire end 42B, the second wire 42 crosses over the first wire 41 from the first positive direction X1 side to the first negative direction X2 side. Moreover, at the remaining two locations, the second wire 42 crosses over the first wire 41 in the opposite direction thereof.

[0061] (About the location of the intersection and transverse section)

[0062] like Figure 1 As shown in FIG. 1 , the first intersection portion 51, the first transverse portion 52, and the second intersection portion 53 are located on the third positive direction Z1 side relative to the central axis 11C. Specifically, the first intersection portion 51, the first transverse portion 52, and the second intersection portion 53 are located on the outer peripheral surface of the winding core portion 11 on the third positive direction Z1 side relative to the central axis 11C. In this way, when the central axis 11C is used as a reference, each portion is located on the same side as the joint portion JP of each external electrode 30.

[0063] like Figure 2 As shown, when the first intersection 51 is observed from the third positive direction Z1 side, the core 11 is equally divided into three regions in a direction orthogonal to the central axis 11C. That is, the surface of the core 11 facing the third positive direction Z1 is equally divided into three regions in the direction along the second axis Y of the core 11. At this time, the first intersection 51 is located in the central region P.

[0064] Here, it is assumed that a virtual line L is drawn that passes through the first intersection 51 and is parallel to the central axis 11C. At this time, the second intersection 53 is not located on the virtual line L. That is, the position of the second intersection 53 in the direction along the second axis Y is different from that of the first intersection 51. Specifically, when viewed toward the third negative direction Z2, the second intersection 53 is located on the second negative direction Y2 side relative to the first intersection 51.

[0065] (About mode conversion characteristics)

[0066] The coil component 10 of the first embodiment and the coil component of the comparative example were used as the objects, and Ssd12 was measured as an index related to the mode conversion characteristics. The various dimensions of the coil component of the comparative example are the same as those of the coil component 10 of the first embodiment. In addition, the material of the drum core and the material of the top plate of the coil component of the comparative example are the same as those of the coil component 10 of the first embodiment. In addition, the number of windings of the first wire rod and the second wire rod of the coil component of the comparative example is 30 turns, which is the same as the coil component 10 of the first embodiment. The winding method of the coil component of the comparative example is the same as that of the coil component 10 of the first embodiment except for the first intersection. When the central axis 11C is used as a reference, the intersection located closest to the second wire end side in the coil component of the comparative example is not located on the same side as the joint JP of each external electrode 30, but is located on the outer peripheral surface of the second negative direction Y2 side of the winding core 11. Specifically, the intersection in the coil component of the comparative example is the 30th turn of the first wire rod and the second wire rod. 20 of each coil component were made. That is, the number of samples is set to 20 in each coil component.

[0067] In the measurement, the coil component 10 of the first embodiment and the coil component of the comparative example were respectively mounted on a three-port substrate conforming to the OPEN Alliance. Then, after SOLT calibration was performed on each coil component, the Ssd12 of each coil component was measured. Then, the measurement results obtained from each coil component, that is, the average value of 20 measurement results, was set as the representative value of the measurement results.

[0068] In the coil component 10 of the first embodiment, when the measurement frequency is 500kHz, Ssd12 is -82.0dB. In addition, in the coil component of the comparative example, when the measurement frequency is 500kHz, Ssd12 is -79.6dB. That is, it can be seen that when the position of the first intersection 51 is located on the third positive direction Z1 side, that is, on the same side as the joint JP of the external electrode 30, the value of Ssd12 can be suppressed. In particular, the effect of suppressing the value of Ssd12 in the coil component 10 of the first embodiment compared with the comparative example is particularly significant when the frequency is below 1GHz.

[0069] (Effects of the First Embodiment)

[0070] (1-1) According to the above-mentioned embodiment, the first wire 41 and the second wire 42 do not have an intersection at the final turn and thereafter. In other words, the first wire 41 and the second wire 42 do not intersect near the second flange portion 22 such as the area separated from the winding core portion 11 and led to the corresponding external electrode 30. On the other hand, the first intersection 51 is located one turn before the final turn of the second wire 42. That is, the first intersection 51 is quite far from the second wire end 42B on the line of the second wire 42. Therefore, it is difficult for heat from the external electrode 30 to be transferred to the first intersection 51. Therefore, it is possible to suppress the melting of the coating of the first wire 41 and the coating of the second wire 42 due to heat at the first intersection 51.

[0071] (1-2) In the above embodiment, the inner circumferential winding portion 63 has the second intersection portion 53 intersecting with the first wire 41. In addition, the second wire 42 has the first transverse portion 52 transverse to the first wire 41 on the first wire end 42A side relative to the first intersection portion 51. According to this structure, the balance of the stray capacitance before and after the second intersection portion 53 and before and after the first transverse portion 52 can be achieved, and the electrical characteristics can be improved.

[0072] (1-3) In the above embodiment, the direction in which the second wire 42 crosses over the first wire 41 in the direction along the central axis 11C at the first intersection 51 is opposite to the direction in which the second wire 42 crosses over the first wire 41 in the direction along the central axis 11C at the first transverse portion 52. At the portion where the wires cross, the first wire 41 is pressed and wound by the second wire 42. Therefore, an external force in the direction in which the second wire 42 crosses acts on the first wire 41. Since the directions of crossing at the first intersection 51 and the first transverse portion 52 are different, the external forces acting on the first wire 41 cancel each other out. As a result, according to the above structure, the position of the first wire 41 is difficult to shift, and the winding of the second wire 42 is stable.

[0073] (1-4) The direction in which the second wire 42 crosses the first wire 41 in the direction along the central axis 11C at the first intersection 51 is the same as the direction in which the second wire 42 crosses the first wire 41 in the direction along the central axis 11C at the second intersection 53. That is, the direction of the crossing changes alternately at the first intersection 51, the first transverse section 52, and the second intersection 53. According to this structure, when the second wire 42 is wound, the direction of the external force acting on the first wire 41 by the second wire 42 does not deviate. Therefore, the position of the first wire 41 is difficult to shift, and the winding of the second wire 42 is stable.

[0074] (1-5) In the above embodiment, the second intersection 53 is not located on the virtual line L that passes through the first intersection 51 and is parallel to the central axis 11C. That is, when viewed toward the third negative direction Z2, the intersection positions along the direction of the second axis Y are different at the first intersection 51 and the second intersection 53. According to such a structure, compared with a method in which the positions of the intersections in the direction along the second axis Y are concentrated at a specific position, the winding of the second wire 42 is stable.

[0075] (1-6) In the above embodiment, the first intersection 51 is located on the third positive direction Z1 side relative to the central axis 11C. In other words, the first intersection 51 is located on the same side as the joint JP of the external electrode 30. According to this structure, the asymmetry of electrical characteristics such as inductance and capacitance is reduced, so as shown in the measurement result of Ssd12, the mode conversion characteristics are improved. That is, according to this structure, compared with the coil component in which the first intersection 51 is located on the second negative direction Y2 side in the 30th turn, Ssd12 is improved.

[0076] (1-7) In the above embodiment, when the winding core 11 is equally divided into three regions along the second positive direction Y1 when the first intersection 51 is viewed from the third positive direction Z1 side, the first intersection 51 is located in the central region P. Since the first intersection 51 is located in the central region P, it is difficult to generate winding disorder at the first intersection 51. In particular, it is difficult to obtain the effect of limiting position deviation by other adjacent turns near the final turn. Therefore, according to the above structure, the winding disorder at the first intersection 51 can be effectively suppressed.

[0077] <Regarding the Coil Component of the Second Embodiment>

[0078] Hereinafter, a coil component 100 according to a second embodiment will be described. Note that the same reference numerals are used for the same configurations as those of the first embodiment, and description thereof will be omitted or simplified.

[0079] like Figure 6 As shown, in the coil component 100 of the second embodiment, the second wire 42 does not have the inner circumferential winding portion 63, which is different from the first embodiment. In addition, in the coil component 100 of the second embodiment, the second wire 42 has a multilayer portion TL described later, which is different from the first embodiment.

[0080] On the other hand, Figure 7 as well as Figure 8As shown, in the second embodiment, the second wire 42 has a first intersection 51, which is the same as the first embodiment. That is, the Mth turn of the second wire 42 and the Nth turn of the first wire 41 do not have an intersection that intersects with each other. In addition, the (M-1)th turn of the second wire 42 and the (N-1)th turn of the first wire 41 have a first intersection 51 that intersects with each other. In the second embodiment, N and M are also both 30.

[0081] (About the second wire)

[0082] In the coil component 100 of the second embodiment, the second wire 42 includes an outer peripheral winding portion 161. The outer peripheral winding portion 161 is a portion wound over a plurality of turns on the outer peripheral side relative to the first wire 41. The outer peripheral winding portion 161 is located on the first wire end 42A side of the second wire 42 relative to the first intersection 51. Specifically, the outer peripheral winding portion 161 is a section from the first turn to the 27th turn of the second wire 42.

[0083] The outer peripheral winding portion 161 has a first transverse portion 52 that crosses the first wire 41 on the first wire end 42A side relative to the first intersection portion 51. Due to the presence of the first transverse portion 52, the outer peripheral winding portion 161 of the second wire 42 has a portion in contact with the Xth turn of the first wire 41, a portion in contact with the X+1th turn, and a portion in contact with the X+2th turn (X is a positive integer) within the range of one turn.

[0084] Specifically, if Figure 7 As shown, the portion of 23.0 turns of the second wire 42 is located between the 21st turn and the 22nd turn of the first wire 41. On the other hand, the portion of 24.0 turns of the second wire 42 is located between the 24th turn and the 25th turn of the first wire 41. That is, the 23rd turn of the second wire 42 in the upper layer has a contact portion with each of the 22nd turn, the 23rd turn, and the 24th turn of the first wire 41.

[0085] like Figure 7 as well as Figure 8 As shown, the outer peripheral winding portion 161 of the second wire 42 has a multilayer portion TL. The multilayer portion TL is a portion of the outer peripheral winding portion 161 where the second wire 42 is continuously wound in two layers over one turn or more. The multilayer portion TL is located on the first wire end 42A side relative to the first transverse portion 52. In other words, the first transverse portion 52 is located on the first wire end 42A side relative to the first intersection portion 51 and on the second wire end 42B side relative to the multilayer portion TL. In the present embodiment, the multilayer portion TL is a portion of the second wire 42 from the middle of the 16th turn to the middle of the 18th turn. Therefore, in the multilayer portion TL, the second wire 42 is continuously wound in two layers or more over about two turns.

[0086] Specifically, in the outer peripheral winding portion 161, the second wire 42 is directly wound around the outer peripheral side of the first wire 41 from the position of 1.0 turns to the position of about 16.5 turns. In addition, the second wire 42 is directly wound around the outer peripheral side of the first wire 41 from the position of about 18.5 turns to the position of about 28.0 turns. In contrast, the second wire 42 is wound around the outer peripheral side of the portion before the 16th turn of the second wire 42 from the position of about 16.5 turns to the position of about 18.5 turns. In other words, the second wire 42 is placed on the outer peripheral side of the first layer portion of the second wire 42 from the position of about 16.5 turns to the position of about 18.5 turns. In addition, the so-called "direct winding" includes not only a state in which the second wire 42 is in contact with the outer peripheral surface of the first wire 41 or the second wire 42, but also a state in which the second wire 42 floats relative to the wires of the lower layer.

[0087] More specifically, in the multilayer portion TL, the portion of about 16.5 turns of the second wire 42 is located between the portion of about 13.5 turns and the portion of about 14.5 turns of the second wire 42. The portion of 17.5 turns of the second wire 42 is located between the portion of 14.5 turns and the portion of 15.5 turns of the second wire 42. That is, the 16th turn of the second wire 42 is overlapped on the outer peripheral side of the 13th and 14th turns of the second wire 42 from the portion of about 16.5 turns. The 17th turn of the second wire 42 is overlapped on the outer peripheral side of the 14th and 15th turns of the second wire 42. Therefore, in the multilayer portion TL, the second wire 42 is overlapped in two layers. Therefore, in the multilayer portion TL, the first wire 41 and the second wire 42 are overlapped in three layers in total. In addition, the second wire 42 has a portion where the second wire 42 crosses in the multilayer portion TL. In the portion where the second wires 42 intersect each other, three second wires 42 are arranged in a direction orthogonal to the central axis 11C.

[0088] Thus, in the 16th turn of the second wire 42 in the multilayer portion TL, the wire is wound back by about two turns toward the first flange portion 21. Therefore, in the turn before the multilayer portion TL, the Xth turn of the second wire 42 is located between the valleys of the Xth turn and the (X+1)th turn of the first wire 41. On the other hand, in the turn after the multilayer portion TL and before the first transverse portion 52, the Xth turn of the second wire 42 is located between the valleys of the (X-2)th turn and the (X-1)th turn of the first wire 41. Therefore, when the second wire 42 is wound from the first wire end 41A to the second wire end 42B, the second wire 42 crosses the first wire 41 from the first negative direction X2 side to the first positive direction X2 side in the multilayer portion TL. In addition, when the second wire 42 is wound from two layers to one layer after the multilayer portion TL, it crosses the first wire 41 from the first positive direction X1 side to the first negative direction X2 side.

[0089] (Effects of the Second Embodiment)

[0090] According to the second embodiment, in addition to the effects (1-1), (1-3), (1-5) to (1-7) of the above-mentioned first embodiment, the following effects are achieved.

[0091] (2-1) In the second embodiment, the outer peripheral winding portion 161 of the second wire 42 has a multilayer portion TL wound over two or more layers on the outer peripheral side relative to the first wire 41. Moreover, by the presence of the multilayer portion TL, it is possible to switch whether the X-th turn of the second wire 42 is located on the first positive direction X1 side or the first negative direction X2 side relative to the X-th turn of the first wire 41. In this way, by switching the positional relationship of each wire in the direction along the central axis 11C midway, the stray capacitance generated between the wires can be adjusted.

[0092] (2-2) In the second embodiment, the outer peripheral winding portion 161 has the first transverse portion 52 on the first end 42A side relative to the first intersection portion 51 and on the second end 42B side relative to the multilayer portion TL. In this way, by not arranging the first transverse portion 52 extremely close to the first flange portion 21 side or extremely close to the second flange portion 22 side, the asymmetry of electrical characteristics such as inductance and capacitance can be reduced. Therefore, the mode conversion characteristics can be improved.

[0093] <Change Example>

[0094] The above-described embodiment and the following modified examples can be combined and implemented within the scope of no technical contradiction.

[0095] (About Modification Example Related to Coil Components)

[0096] In the above-described embodiment, the top plate 10F of the coil component 10 can be omitted. In addition, various dimensions of the coil component 10 are not limited to the examples of the above-described embodiment.

[0097] The shape of the winding core 11 is not limited to the example of the above-mentioned embodiment. For example, the shape of the winding core 11 may be a cylindrical shape or a polygonal column shape other than a quadrangular column shape.

[0098] The structure of the drum core 10C is not limited to the example of the above embodiment. For example, the first flange portion 21 and the second flange portion 22 may not protrude in the third positive direction Z1 at the central portion along the direction of the second axis Y. For example, the first flange portion 21 and the second flange portion 22 may be shaped so as to be concave and bifurcated at the central portion along the direction of the second axis Y.

[0099] The method of connecting the joint portion JP of the external electrode 30 and the wire end of each wire is not limited to thermocompression bonding. For example, the wire end of each wire may be joined to the joint portion JP by laser or by other methods.

[0100] The material and shape of the external electrode 30 are not limited to the examples of the above embodiment. The external electrode 30 can be connected to the first wire 41 and the second wire 42. For example, the external electrode 30 may include a metal layer and a plating layer, and the wires are connected to the plating layer.

[0101] (About changes related to wire materials)

[0102] In the above-mentioned embodiment, the values ​​of N and M are not limited as long as they are integers greater than 2. For example, the value of N and the value of M may be different.

[0103] The number of turns of the first outer circumferential winding portion 61 , the number of turns of the second outer circumferential winding portion 62 , and the number of turns of the inner circumferential winding portion 63 are not limited to those in the above-described embodiment.

[0104] For example, in Figure 5 In the example shown, the 1.0 turn portion of the second wire 42 is directly wound on the outer peripheral surface of the winding core 11 without interposing the first wire 41. Specifically, the first turn of the second wire 42 is located on the first negative direction X2 side relative to the first turn of the first wire 41. Furthermore, the second wire 42 is wound on the outer peripheral side relative to the first wire 41 from the second turn to the 13th turn. That is, the first outer peripheral winding portion 61 is the section from the second turn to the 13th turn.

[0105] In addition, Figure 5 In the example shown, the second wire 42 is wound on the outer peripheral side relative to the first wire 41 from the 17th turn to the 26th turn. In addition, the second wire 42 is directly wound on the outer peripheral surface of the winding core 11 without the first wire 41 in the middle of the 27th turn. That is, the second outer peripheral winding portion 62 is the section from the 17th turn to the 26th turn.

[0106] In addition, Figure 5 In the example shown, the inner peripheral winding portion 63 is located between the first outer peripheral winding portion 61 and the second outer peripheral winding portion 62 in the direction along the central axis 11C. The inner peripheral winding portion 63 is a portion of the second wire 42 that is continuously wound around the outer peripheral side of the first wire 41 by less than 1.0 turns. Specifically, the inner peripheral winding portion 63 is a section from the 14th turn to the 16th turn of the second wire 42.

[0107] exist Figure 5In the example shown, on the outer peripheral surface of the winding core 11, before the second turn of the first wire 41, there is not only the first turn of the first wire 41 but also the second turn of the second wire 42. In this way, since the positional deviation of the second turn and thereafter of the first wire 41 to the first positive direction X1 side can be restricted by the first turns of the two wires, the loose winding of the first wire 41 and the second wire 42 can be suppressed in the second turn and thereafter.

[0108] The second wire 42 may include, in addition to the first outer peripheral winding portion 61 and the second outer peripheral winding portion 62, an outer peripheral winding portion wound over a plurality of turns on the outer peripheral side relative to the first wire 41. In addition, the second wire 42 may include, in addition to the inner peripheral winding portion 63, an inner peripheral winding portion whose range of winding continuously wound on the outer peripheral side of the first wire 41 is less than 1.0 turn in each turn of the second wire 42. For example, in the above-mentioned embodiment, the second wire 42 may include, in order, a third outer peripheral winding portion, a second inner peripheral winding portion, and a second outer peripheral winding portion 62 on the second wire end 42B side of the inner peripheral winding portion 63.

[0109] The second wire 42 can omit the first transverse portion 52 and the second intersection portion 53. Specifically, the second wire 42 may omit both the first transverse portion 52 and the second intersection portion 53, or may omit either the first transverse portion 52 and the second intersection portion 53. For example, the first transverse portion 52 and the second intersection portion 53 may be appropriately adopted according to the number of wires that are drawn out from the winding core 11 and reach the portion of the external electrode 30, the direction in which the wires cross, and the like.

[0110] The direction in which the second wire 42 crosses the first wire 41 in the direction along the central axis 11C at the first intersection 51 and the direction in which the second wire 42 crosses the first wire 41 in the direction along the central axis 11C at the first transverse portion 52 may be the same direction. The direction of the crossing can be appropriately changed depending on whether there is another wire crossing and the direction of the crossing at the crossing portion of the wire.

[0111] The direction in which the second wire 42 crosses the first wire 41 in the direction along the central axis 11C at the first intersection 51 and the direction in which the second wire 42 crosses the first wire 41 in the direction along the central axis 11C at the second intersection 53 may be opposite directions. The direction of the crossing can be appropriately changed depending on whether there is another wire crossing and the direction of the crossing at the crossing portion of the wire.

[0112] When the coil component 10 is viewed in the second positive direction Y1, the second wire 42 may not cross the first wire 41 near 1.0 turn of the second wire 42. If the second wire 42 has a plurality of pairs of crossing portions with different crossing directions with respect to the first wire 41, the twisting of the wire is eliminated as a whole.

[0113] The first intersection 51 may be located at a location other than the central region P. In addition, the position of the first intersection 51 along the direction of the central axis 11C, the position along the direction of the second axis Y, and the position along the direction of the third axis Z are not limited to the example of the above-mentioned embodiment. That is, the first intersection 51 may be located on the outer peripheral surface of the winding core portion 11 other than the surface facing the third positive direction Z1. As a result, the first intersection 51 may be located on the outer peripheral surface of the winding core portion 11 in a direction different from the direction in which the external electrode 30 is located in each flange portion.

[0114] In the first intersection 51, the first wire 41 may cross the second wire 42 from the outer circumference. That is, as long as the (M-1)th turn of the second wire 42 and the (N-1)th turn of the first wire 41 intersect each other, the wire located on the outer circumference at the first intersection 51 may be either wire.

[0115] (About changes related to multi-layer parts)

[0116] In the second embodiment, the number of turns that become the starting end of the multilayer portion TL and the number of turns that become the terminal end of the multilayer portion TL are not limited to the examples in the above embodiment. It is sufficient as long as the second wire 42 is continuously wound over two or more layers over at least one turn. Therefore, the multilayer portion TL may be wound over one turn or over three turns or more.

[0117] The position of the multilayer portion TL is not limited to the above-described embodiment. That is, the multilayer portion TL may be located on the second end 42B side relative to the first transverse portion 52. In other words, the first transverse portion 52 may be located on the first end 42A side relative to the multilayer portion TL.

[0118] <Note>

[0119] The following describes technical ideas derived from the above-mentioned embodiments and modified examples.

[0120] [1] A coil component comprising: a drum core having a columnar winding core portion, and a first flange portion and a second flange portion, wherein the first flange portion is connected to a first end of the winding core portion in a direction along a central axis, and the second flange portion is connected to 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 located on a surface of the first flange portion; a third external electrode and a fourth external electrode located on a surface of the second flange portion; a first wire rod wound on the winding core portion, a first wire end connected to the first external electrode, and a second wire end connected to the third external electrode; and a second wire rod wound on the winding core portion in the same direction as the first wire rod, a first wire end connected to the second external electrode, and a second wire end connected to the fourth external electrode, wherein N and M are integers greater than or equal to 2, a portion that first contacts the outer peripheral surface of the winding core portion when the first wire rod is moved from the first wire end to the second wire end is a portion of 1.0 turn of the first wire rod, and a portion that is 1.0 turn of the first wire rod is a portion that is 1.0 turn of the first wire rod from the top of the first wire rod. The number of turns of the first wire end increases by one turn each time the first wire end is wound around the central axis toward the second wire end, and the turn including the portion that contacts the outer peripheral surface of the winding core portion last when the first wire end is extended to the second wire end is set as the Nth turn, and the portion where the angular position of the portion of 1.0 turn of the first wire rod coincides with the angular position of the portion of 1.0 turn of the first wire rod for the first time when the second wire rod is extended to the second wire end is set as the portion of 1.0 turn of the second wire rod, and the number of turns of the second wire end increases by one turn each time the first wire end is wound around the central axis toward the second wire end, and the turn including the portion that contacts the outer peripheral surface of the winding core portion last when the second wire rod is extended to the second wire end is set as the Mth turn. At this time, the Mth turn of the second wire rod and the Nth turn of the first wire rod do not have an intersection portion that intersects with each other, and the (M-1)th turn of the second wire rod and the (N-1)th turn of the first wire rod have a first intersection portion that intersects with each other.

[0121] [2] The coil component according to [1], wherein the second wire has an outer peripheral winding portion wound over a plurality of turns on the outer peripheral side relative to the first wire, and the outer peripheral winding portion has a first transverse portion that crosses the first wire without reaching the same layer as the first wire on the first wire end side relative to the first intersection portion.

[0122] [3] The coil component according to [2], wherein, when extending along the second wire from the first wire end to the second wire end, the direction in which the second wire crosses over the first wire in the direction along the center axis at the first intersection is opposite to the direction in which the second wire crosses over the first wire in the direction along the center axis at the first transverse section.

[0123] [4] A coil component according to any one of [1] to [3], wherein the second wire comprises: a first outer peripheral winding portion, which is wound on the outer peripheral side relative to the first wire for a plurality of turns; a second outer peripheral winding portion, which is located on the second wire end side relative to the first outer peripheral winding portion and is wound on the outer peripheral side relative to the first wire for a plurality of turns; and an inner peripheral winding portion, which is located between the first outer peripheral winding portion and the second outer peripheral winding portion in the direction along the center axis, at least a portion of which is wound on the outer peripheral surface of the winding core portion, and the range of the second wire continuously wound on the outer peripheral side of the first wire is less than 1.0 turns, and the inner peripheral winding portion has a second intersection portion that intersects with the first wire.

[0124] [5] The coil component according to [4], wherein, when extending along the second wire from the first wire end to the second wire end, the direction in which the second wire crosses over the first wire in the direction along the center axis at the first intersection is the same as the direction in which the second wire crosses over the first wire in the direction along the center axis at the second intersection.

[0125] [6] The coil component according to [5], wherein the second intersection is not located on a virtual line that passes through the first intersection and is parallel to the center axis.

[0126] [7] A coil component according to any one of [1] to [6], wherein, when a specific direction orthogonal to the above-mentioned central axis is set as a positive direction, the above-mentioned first external electrode and the above-mentioned second external electrode are located on a surface of the above-mentioned first flange portion on the above-mentioned positive direction side relative to the above-mentioned central axis, the above-mentioned third external electrode and the above-mentioned fourth external electrode are located on a surface of the above-mentioned second flange portion on the above-mentioned positive direction side relative to the above-mentioned central axis, and the above-mentioned first intersection portion is located on the outer peripheral surface of the above-mentioned core portion on the above-mentioned positive direction side relative to the above-mentioned central axis.

[0127] [8] The coil component according to [7], wherein when the winding core portion is divided into three equal regions in directions orthogonal to both the central axis and the specific direction when the first intersection portion is observed from the positive direction side, the first intersection portion is located in the center of the region.

[0128] [9] A coil component according to any one of [1] to [8], wherein the second wire has an outer peripheral winding portion wound around the first wire in multiple turns, and the outer peripheral winding portion has a multi-layer portion in which the second wire is continuously wound around two or more layers in more than one turn.

[0129]

[10] The coil component according to [9], wherein the peripheral winding portion has a first transverse section that crosses the first wire without reaching the same layer of the first wire, on the first wire end side relative to the first intersection portion and on the second wire end side relative to the multi-layer portion.

[0130] Description of Reference Numerals

[0131] P... Area

[0132] 10...Coil components

[0133] 10C...Drum core

[0134] 11...Core

[0135] 11C...Center axis

[0136] 21...First flange portion

[0137] 22...Second flange portion

[0138] 31...First external electrode

[0139] 32...Second external electrode

[0140] 33...Third external electrode

[0141] 34...Fourth external electrode

[0142] 41...First Wire

[0143] 42...Second wire

[0144] 51...First intersection

[0145] 52...First transverse section

[0146] 53...The second intersection

[0147] 61... first outer peripheral winding portion 62... second outer peripheral winding portion

[0148] 63...Inner winding part

[0149] 100...Coil parts

[0150] 161...Outer peripheral winding part

[0151] TL...Multi-layer part

Claims

1. A coil component, comprising: The drum core has a columnar winding core portion, a first flange portion, and a second flange portion, wherein: The first flange portion is connected to a first end of the winding core portion in a direction along the central axis, and the second flange portion is connected to 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 are located on the surface of the first flange portion; A third external electrode and a fourth external electrode are located on the surface of the second flange portion; A first wire rod is wound around the winding core, a first wire end is connected to the first external electrode, and a second wire end is connected to the third external electrode; and A second wire is wound around the winding core in the same direction as the first wire, a first wire end is connected to the second external electrode, and a second wire end is connected to the fourth external electrode. Let N and M be integers greater than 2, The portion that first contacts the outer peripheral surface of the winding core portion when the first wire rod is moved from the first wire end to the second wire end of the first wire rod is set as the portion of 1.0 turn of the first wire rod, and the number of turns increases by one turn per rotation around the central axis from the first wire end to the second wire end of the first wire rod, and the turn included in the portion that last contacts the outer peripheral surface of the winding core portion when the first wire rod is moved from the first wire end to the second wire end is set as the Nth turn, The portion where the angular position centered on the central axis coincides with the angular position of the portion of 1.0 turn of the first wire for the first time when the second wire is extended from the first end to the second end, is set as the portion of 1.0 turn of the second wire, and the number of turns increases by one turn for each rotation around the central axis from the first end of the second wire toward the second end, and the turn included in the portion that contacts the outer peripheral surface of the winding core for the last time when the second wire is extended from the first end to the second end, is set as the Mth turn. At this time, The Mth turn of the second wire and the Nth turn of the first wire do not have an intersection portion that intersects each other. The (M-1)th turn of the second wire and the (N-1)th turn of the first wire have a first intersection portion that intersects with each other.

2. The coil component according to claim 1, wherein The second wire rod includes an outer peripheral winding portion wound in a plurality of turns on the outer peripheral side of the first wire rod, The outer peripheral winding portion has a first transverse portion that does not reach the same layer of the first wire material but strides over the first wire material on the first wire end side relative to the first intersection portion.

3. The coil component according to claim 2, wherein: When the second wire is extended from the first wire end to the second wire end, the direction in which the second wire crosses over the first wire in the direction along the central axis at the first intersection is opposite to the direction in which the second wire crosses over the first wire in the direction along the central axis at the first transverse section.

4. The coil component according to any one of claims 1 to 3, wherein: The second wire material has: A first outer peripheral winding portion is wound over a plurality of turns on the outer peripheral side relative to the first wire rod; A second outer peripheral winding portion is located on the second wire end side relative to the first outer peripheral winding portion and is wound around the outer peripheral side relative to the first wire rod over a plurality of turns; as well as The inner peripheral winding portion is located between the first outer peripheral winding portion and the second outer peripheral winding portion in the direction along the central axis, at least a portion of which is wound around the outer peripheral surface of the winding core portion, and the range of which is continuously wound around the outer peripheral side of the first wire in the second wire is less than 1.0 turn, The inner circumferential winding portion includes a second intersection portion intersecting with the first wire rod.

5. The coil component according to claim 4, wherein When the second wire is extended from the first wire end to the second wire end, the direction in which the second wire crosses over the first wire in the direction along the central axis at the first intersection is the same as the direction in which the second wire crosses over the first wire in the direction along the central axis at the second intersection.

6. The coil component according to claim 5, wherein The second intersection is not located on a virtual line that passes through the first intersection and is parallel to the central axis.

7. The coil component according to any one of claims 1 to 6, wherein: When a specific direction perpendicular to the central axis is defined as a positive direction, The first external electrode and the second external electrode are located on a surface of the first flange portion on the positive direction side relative to the central axis. The third external electrode and the fourth external electrode are located on a surface of the second flange portion on the positive direction side relative to the central axis. The first intersection portion is located on the outer peripheral surface of the winding core portion on the positive direction side with respect to the central axis.

8. The coil component according to claim 7, wherein When the winding core portion is equally divided into three regions in a direction perpendicular to both the central axis and the specific direction when the first intersection portion is viewed from the positive direction side, the first intersection portion is located in the center of the region.

9. The coil component according to any one of claims 1 to 8, wherein: The second wire rod includes an outer peripheral winding portion wound in a plurality of turns on the outer peripheral side of the first wire rod, The outer peripheral winding portion includes a multilayer portion in which the second wire is continuously wound in two or more layers over one turn or more.

10. The coil component according to claim 9, wherein The outer peripheral winding portion has a first transverse portion that crosses over the first wire rod without reaching the same layer of the first wire rod, on the first wire end side relative to the first intersection portion and on the second wire end side relative to the multilayer portion.

Images