Coil component

Abstract

The invention provides a coil component which can determine the orientation of the coil component. The coil component includes: a drum core having a winding core portion, a first flange portion, and a second flange portion; a first external electrode; a second external electrode; a third external electrode; a fourth external electrode; a first wire; and a second wire. The second wire includes a first winding portion and a second winding portion. The first winding portion is a portion wound around the outer peripheral side of the first wire across the plurality of turns. The second winding portion is a portion that is located closer to the second wire end than the first winding portion and that is continuously wound around the outer peripheral side of the first wire in a range of less than 1.0 turns. When a position closest to the second wire end side in the first winding portion is set as an end portion of the first winding portion, the first winding portion has a first crossing portion that spans the first wire without reaching the same layer of the first wire in a section from the end portion to a portion up to the first turn.

Description

Technical Field

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

[0002] The coil component described in Patent Document 1 includes an iron core, four external electrodes, a first wire, and a second wire. The iron 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. 2016-195290

[0005] In the coil component described in patent document 1, the electrical characteristics and magnetic characteristics will change according to the direction of the current flowing through each wire. Therefore, in order to obtain the characteristics assumed for the coil component, it is necessary to mount the coil component on the substrate according to a predetermined direction. For example, it is considered that the direction of the coil component can be determined by marking the iron core of the coil component with an optically observable mark. However, in this case, the manufacturing process has to be added only for the purpose of marking the mark, so the complication of the manufacturing process cannot be avoided. Summary of the invention

[0006] In order to solve the above-mentioned problems, the present invention provides a coil component, comprising: a drum core, having a columnar winding core portion, a first flange portion connected to a first end of the winding core portion in a direction along the central axis, and a second flange portion 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, located on the surface of the first flange portion; a third external electrode and a fourth external electrode, located on the 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, with the first wire end of the first wire rod being wound around the central axis as the center for one turn each time toward the second wire end. The number of turns increases by 1, and the number of turns increases by 1 each time the second wire rod is wound once with the central axis as the center from the first wire end toward the second wire end side. The second wire rod comprises: a first winding portion, which is wound on the outer peripheral side of the first wire rod over a plurality of turns; and a second winding portion, which is located closer to the second wire end side than the first winding portion, at least a portion of which is wound on the outer peripheral surface of the winding core portion, and the range of continuous winding on the outer peripheral side of the first wire rod is less than 1.0 turn. When the second wire rod is advanced from the first wire end to the second wire end in the first winding portion, when the position closest to the second wire end in the first winding portion is set as the end position of the first winding portion, the first winding portion has a first traversing portion, and the first traversing portion does not reach the same layer of the first wire rod but crosses over the first wire rod in the interval from the end position to the position up to the previous turn.

[0007] The orientation of the coil component can be determined without marking the core. 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 method of the wire material when the coil component is viewed in the third negative direction.

[0011] Figure 4 This is a diagram for explaining the winding method 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 method of the wire material when the coil component according to the modification example is viewed toward the second positive direction.

[0013] Description of Reference Numerals

[0014] AP…area; 10…coil component; 10C…drum core; 11…winding core portion; 11C…center axis; 21…first flange portion; 22…second flange portion; 31…first external electrode; 32…second external electrode; 33…third external electrode; 34…fourth external electrode; 41…first wire; 42…second wire; 51…first winding portion; 52…second winding portion; 61…first transverse portion; 62…first intersection portion. DETAILED DESCRIPTION

[0015] <About the overall structure>

[0016] like Figure 1 As shown, the coil component 10 includes a drum core 10C and a top plate 10F.

[0017] The drum core 10C includes a winding core portion 11 , a first flange portion 21 , and a second flange portion 22 .

[0018] The core portion 11 is in the shape of a quadrangular prism. The cross section of the core portion 11 perpendicular to the central axis 11C is a rectangle. In addition, the "rectangle" mentioned here has four sides and is a rectangle as a whole, and also includes a shape in which the corners of the rectangle are chamfered. In the present embodiment, the material of the core portion 11 is Ni-Zn ferrite. In addition, the material of the core portion 11 can be, for example, alumina, Ni-Zn ferrite, synthetic resin, and a mixture thereof.

[0019] Here, a specific axis of the winding core 11 parallel to the central axis 11C is set as the first axis X. An axis orthogonal to the first axis X is set as the second axis Y. In the present embodiment, the second axis Y is parallel to two of the four sides of the winding core 11 when viewed in the direction along the first axis X. 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 present embodiment, the third axis Z is parallel to the remaining two of the four sides of the winding core 11 when viewed in the direction along the first axis X. Moreover, one of the directions along the first axis X is set as the first positive direction X1, and the direction opposite to 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 direction opposite to 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 direction opposite to the third positive direction Z1 is set as the third negative direction Z2. In addition, in the present embodiment, the specific direction orthogonal to the central axis 11C coincides with the third positive direction Z1.

[0020] like Figure 1As 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 material of the first flange 21 is the same Ni-Zn ferrite as that of the winding core 11.

[0021] 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 in the direction along the second axis Y.

[0022] 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.

[0023] The second flange portion 22 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 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 axis Y.

[0024] 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.

[0025] 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 .

[0026] The first external electrode 31 is attached to the first flange portion 21. The first external electrode 31 is located on a surface on the second positive direction Y1 side relative to the center of the first flange portion 21 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.

[0027] 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.

[0028] The bonding portion BP is roughly plate-shaped. When the bonding portion BP is observed from the direction along the second axis Y, the bonding portion BP is roughly L-shaped. That is, the bonding portion 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 portion BP is bonded to the surface on the first positive direction X1 side of the first flange portion 21.

[0029] The connecting portion CP is roughly plate-shaped. The connecting portion CP is connected to the end surface on the second positive direction Y1 side of the bonding portion BP. 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 connecting portion CP 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.

[0030] 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 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 to which the end of the wire is connected 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.

[0031] The second external electrode 32 is mounted on the first flange portion 21. The second external electrode 32 is located on a surface on the second negative direction Y2 side relative to the center of the first flange portion 21 along the direction of 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 is plane-symmetrical with the first external electrode 31 about an imaginary plane passing through the central axis 11C and orthogonal to the second axis Y. Therefore, the second external electrode 32 is located on a surface on the third positive direction Z1 side of the first flange portion 21 relative to the central axis 11C.

[0032] The third external electrode 33 is mounted on the second flange portion 22. The third external electrode 33 has a surface located on the second positive direction Y1 side relative to the center of the second flange portion 22 along the direction of 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 symmetrical in shape with respect to the first external electrode 31. Specifically, the third external electrode 33 and the first external electrode 31 are plane-symmetrical with respect to an imaginary plane that is orthogonal to the central axis 11C and passes through the center C 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.

[0033] 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 negative direction Y2 side relative to the center of the second flange portion 22 along the direction of 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 symmetrical with respect to the third external electrode 33. Specifically, the fourth external electrode 34 and the third external electrode 33 are plane-symmetrical with respect to an imaginary plane 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.

[0034] In this 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. The maximum dimension of the coil component 10 along the third axis Z is 2.3 mm.

[0035] <About the First Wire and the Second Wire>

[0036] 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.

[0037] 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.

[0038] like Figure 2As 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. It should be noted that thermocompression bonding refers to a method of sandwiching a wire between the external electrode 30 and a heated jig, melting the wire, and fixing it to the external electrode 30.

[0039] Here, when the first wire 41 is advanced 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 present embodiment, the portion of 1.0 turn of the first wire 41 is located on the ridgeline on the second negative direction Y2 side and the third positive direction Z1 side of the winding core 11.

[0040] like Figure 3 as well as Figure 4 As shown, the number of turns increases by 1 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. When the first wire 41 is viewed in the first negative direction X2, it is wound around the winding core 11 in a clockwise direction 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 shown. Figure 4 , the number of turns of each wire located on the central axis 11C of the winding core 11 when viewing the second positive direction Y1 is schematically illustrated.

[0041] 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, 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 with the winding core 11 without other wires in the floating state.

[0042] In addition, the first turn of the first wire 41 refers to the section from the 1.0 turn position to the section immediately before the 2.0 turn position of the first wire 41. In addition, the final turn of the first wire 41 refers to the turn including the position that finally contacts the outer peripheral surface of the winding core 11 when the first wire 41 is advanced from the first wire end 41A to the second wire end 41B. In the present embodiment, the final turn of the first wire 41 is 21 turns.

[0043] like Figure 2As 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 JP of the corresponding external electrode 30 by thermocompression bonding.

[0044] Here, when the second wire 42 is advanced from the first wire end 42A to the second wire end 42B, the portion whose angular position centered on the central axis 11C initially coincides with the angular position of the portion of 1.0 turn of the first wire 41 is set as the portion of 1.0 turn of the second wire 42. That is, in the present embodiment, 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 when viewed in the direction along the first axis X. In the present embodiment, when the second wire 42 is advanced 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 side opposite to the surface facing the central axis 11C. In addition, the portion of 1.0 turn of the second wire 42 may also contact the outer peripheral surface of the winding core 11.

[0045] like Figure 3 as well as Figure 4 As shown, the number of turns increases by 1 each time the second wire 42 is wound around the central axis 11C from the first wire end 42A toward the second wire end 42B. When the second wire 42 is viewed toward the first negative direction X2, it is wound around the winding core 11 in a clockwise manner 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 around the winding core 11 from the outside relative to the first wire 41. In other words, a portion of the second wire 42 is in contact with the outer peripheral surface of the first wire 41 on the side opposite to the surface facing the central axis 11C.

[0046] The final turns of the second wire 42 are turns including the part that contacts the outer peripheral surface of the winding core 11 when the second wire 42 is moved from the first wire end 42A to the second wire end 42B. In the present embodiment, the final turns of the second wire 42 are 21 turns. 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.

[0047] <Regarding Winding of the First Wire and the Second Wire>

[0048] like Figure 2 As shown, the second wire 42 includes a first winding portion 51 and a second winding portion 52 .

[0049] like Figure 3As shown, the first winding portion 51 is a portion wound around the outer circumference of the first wire 41 over a plurality of turns. In the present embodiment, the first winding portion 51 is a portion from the 1.0 turn portion of the second wire 42 to the middle of the 17th turn. That is, the first winding portion 51 is a portion of the second wire 42 from the portion that is placed on the outer circumferential surface of the first wire 41 to the portion that is wound directly before the winding core portion 11.

[0050] like Figure 3 as well as Figure 4 As shown, from the first turn to the eighth turn of the second wire 42, it is directly wound on the outer peripheral side of the first wire 41. Moreover, in the middle of the ninth turn of the second wire 42, the second wire 42 is directly wound on the outer peripheral side of the portion before the eighth turn of the second wire 42. That is, in the middle of the ninth turn of the second wire 42, it is overlapped on the outer peripheral surface of the second layer portion of the second wire 42. Specifically, the ninth turn of the second wire 42 is overlapped on the outer peripheral surface of the second layer portion of the second wire 42 on the surface on the second positive direction Y1 side of the winding core 11. Moreover, the ninth turn of the second wire 42 is wound from the middle to a position between the sixth turn and the seventh turn of the second wire 42. In this way, the first winding portion 51 includes a portion TL where the second wire 42 is wound in two or more layers relative to the first wire 41 on the outer peripheral side.

[0051] like Figure 4As shown, the ninth turn of the second wire 42 crosses the first wire 41 on the surface on the second positive direction Y1 side of the winding core 11. The "crossing" mentioned here means that one wire crosses over another wire without reaching the same layer as the other wire. Since there is a cross-over portion like this, 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 1 turn. When the second wire 42 is moved from the first wire end 42A to the second wire end 42B, at the cross-over portion, the second wire 42 crosses over the first wire 41 from the first negative direction X2 side to the first positive direction X1 side. 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 situation where the second wire 42 of the upper layer crosses over the first wire 41 wound on the lower layer. In the present embodiment, the portion within 0.5 turns of the ninth turn of the second wire 42 is located between the ninth turn and the tenth turn of the first wire 41. On the other hand, the portion after 0.5 turns of the ninth turn of the second wire 42 is located between the sixth turn and the seventh turn of the second wire 42. The ninth turn of the second wire 42 of the upper layer has a portion that is indirectly in contact with the seventh turn, the eighth turn, and the ninth turn of the first wire 41, respectively, via the second layer of the second wire 42. Here, the groove formed between the two adjacent turns of the wire is regarded as the valley of the wire. At this time, the ninth turn of the second wire 42 covers the valleys of the two first wires 41 in the direction along the central axis 11C.

[0052] Similarly, the tenth turn of the second wire 42 is directly wound on the outer peripheral side of the second layer portion of the second wire 42. Moreover, in the middle of the eleventh turn of the second wire 42, the second wire 42 moves from the outer peripheral side of the second layer portion of the second wire 42 to the outer peripheral side of the first wire 41. Specifically, the eleventh turn of the second wire 42 moves to the outer peripheral side of the first wire 41 on the surface on the second positive direction Y1 side of the winding core 11. Furthermore, from the twelfth turn to the sixteenth turn of the second wire 42, it is directly wound on the outer peripheral side of the first wire 41 throughout the entire circumference.

[0053] like Figure 3 As shown, the sixteenth turn of the second wire 42 has a traversing portion relative to the first wire 41. Specifically, the sixteenth turn of the second wire 42 has contact portions with the sixteenth turn, the seventeenth turn, and the eighteenth turn of the first wire 41. Specifically, the traversing portion is located on the outer peripheral surface on the third positive direction Z1 side of the winding core 11 relative to the central axis 11C. That is, the traversing portion is located at the sixteenth turn, which is located at a portion wound more than 0.5 turns.

[0054] The second wire 42 moves from the outer peripheral surface of the first wire 41 to the outer peripheral surface of the winding core 11 in the middle of the seventeenth turn. Figure 4 As shown, the seventeenth turn of the second wire 42 moves from the outer peripheral surface of the first wire 41 to the outer peripheral surface of the winding core 11 on the surface on the third negative direction Z2 side of the winding core 11. That is, the second wire 42 moves to the outer peripheral surface of the winding core 11 within the range of more than 17.0 turns and within 17.5 turns.

[0055] The portion of the second wire 42 that is wound directly before the outer peripheral surface of the winding core 11 is the position closest to the second wire end 42B in the first winding portion 51 when the second wire 42 advances from the first wire end 42A to the second wire end 42B. In other words, the portion on the third negative direction Z2 side in the seventeenth turn is the end portion EP of the first winding portion 51.

[0056] In the present embodiment, the traversing portion in the sixteenth turn of the second wire 42 is the section from the end portion EP to the portion one turn before, and does not reach the same layer as the first wire 41 but crosses the first traversing portion 61 of the first wire 41. That is, the first winding portion 51 has the first traversing portion 61.

[0057] like Figure 2 As shown, the first traversing portion 61 is located on the third positive direction Z1 side relative to the central axis 11C. Specifically, the first traversing portion 61 is 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. That is, the first traversing portion 61 is located on the same side as the joint JP of each external electrode 30 when the central axis 11C is used as a reference. In addition, when the second wire 42 is moved from the first wire end 42A to the second wire end 42B, in the first traversing portion 61, the second wire 42 crosses the first wire 41 from the first positive direction X1 side to the first negative direction X2 side in the direction along the central axis 11C.

[0058] like Figure 2 As shown, when viewed in the third negative direction Z2, the first winding portion 51 is located on the first flange portion 21 side relative to the center C of the winding core 11 in the direction along the central axis 11C. That is, the first winding portion 51 is close to the first positive direction X1 side of the winding core 11.

[0059] like Figure 3As shown, the second winding portion 52 is located on the second wire end 42B side of the second wire 42 relative to the first winding portion 51. The second winding portion 52 is a winding portion in which at least a portion of the second wire 42 is wound around the outer periphery of the winding core 11, and the range of the second wire 42 continuously wound around the outer periphery of the first wire 41 is less than 1.0 turns. Specifically, the second winding portion 52 is from the middle of the seventeenth turn of the second wire 42 to the final turn of the second wire 42. That is, the second winding portion 52 includes the final turn of the second wire 42.

[0060] like Figure 3 as well as Figure 4 As shown, the eighteenth turn and the nineteenth turn of the second wire 42 are directly wound around the outer peripheral surface of the winding core 11 over the entire circumference. The eighteenth turn of the second wire 42 is located on the first negative direction X2 side relative to the eighteenth turn of the first wire 41. Moreover, the outer surface of the eighteenth turn of the second wire 42 on the first positive direction X1 side is in contact with the outer surface of the eighteenth turn of the first wire 41 on the first negative direction X2 side. On the other hand, the seventeenth turn of the second wire 42 is separated from the eighteenth turn of the first wire 41 in the direction along the central axis 11C.

[0061] In addition, the nineteenth turn of the first wire 41 is located on the first negative direction X2 side relative to the eighteenth turn of the second wire 42. The nineteenth turn of the second wire 42 is located on the first negative direction X2 side relative to the nineteenth turn of the first wire 41. Moreover, the outer surface of the nineteenth turn of the second wire 42 on the first positive direction X1 side is in contact with the outer surface of the nineteenth turn of the first wire 41 on the first negative direction X2 side. On the other hand, the eighteenth turn of the second wire 42 is located at a position separated from the nineteenth turn of the first wire 41 in the direction along the central axis 11C. That is, the second winding portion 52 has a portion PA that is separated from the adjacent wire on at least one side in the direction along the central axis 11C. In addition, in the direction along the central axis 11C, the outer peripheral surface of the winding core portion 11 is exposed from the portion PA that is separated from the adjacent wire.

[0062] The second winding portion 52 has a first intersection portion 62 that intersects with the first wire 41. Specifically, the turn before the final turn of the second wire 42 and the turn before the final turn of the first wire 41 have a first intersection portion 62 that intersects with each other. That is, in the present embodiment, the twentieth turn of the second wire 42 has a first intersection portion 62. The "intersection" mentioned here means that when one wire is moved from the first wire end to the second wire end, a wire located on the same layer as another wire is temporarily placed on the outer peripheral side of the other wire and reaches the same layer as the other wire again. In addition, in this embodiment, as Figure 2As 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, the description "the center line of the second wire 42 intersects the center line of the first wire 41" is synonymous with "the center line of the first wire 41 intersects the center line of the second wire 42".

[0063] like Figure 2 As shown, in the present embodiment, the first intersection 62 is located on the third positive direction Z1 side relative to the central axis 11C. Specifically, the first intersection 62 is located on the outer peripheral surface of the winding core 11 on the third positive direction Z1 side relative to the central axis 11C. That is, the first intersection 62 is located on the same side as the joint JP of each external electrode 30 when the central axis 11C is used as a reference. In addition, when the second wire 42 is caused to advance from the first wire end 42A to the second wire end 42B, in the first intersection 62, in the direction along the central 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. That is, the second wire 42 is caused to advance from the first wire end 42A to the second wire end 42B. At this time, the direction in which the second wire 42 crosses the first wire 41 in the direction along the central axis 11C in the first traversing portion 61 is opposite to the direction in which the second wire 42 crosses the first wire 41 in the direction along the central axis 11C in the first intersection 62.

[0064] In the present embodiment, the second winding portion 52 does not have an intersection portion other than the first intersection portion 62. Moreover, the portion other than the first intersection portion 62 in the second winding portion 52 is directly wound on the outer peripheral surface of the winding core portion 11. In other words, the second winding portion 52 is only placed on the first wire 41 near the first intersection portion 62. Therefore, the range of the second winding portion 52 that is continuously wound on the outer peripheral side of the first wire 41 is less than 1.0 turn.

[0065] like Figure 2 As shown, when the second wire 42 is advanced from the first wire end 42A to the second wire end 42B, the portion TP that finally contacts the outer peripheral surface of the winding core 11 is the portion at the twenty-first turn that contacts the ridgeline on the third positive direction Z1 side and the second positive direction Y1 side of the winding core 11. When the winding core 11 is equally divided into three regions in the direction along the central axis 11C, this portion TP is located in the region AP closest to the second flange portion 22 among the three regions.

[0066] However, the portion of the first wire 41 having 1.0 turns is located on the first positive direction X1 side relative to the portion of the second wire 42 having 1.0 turns. Figure 4As shown, when the coil component 10 is viewed toward the second positive direction Y1, the second wire 42 crosses the first wire 41 near the 1.0 turn portion of the second wire 42. In the intersection portion near the 1.0 turn, when the second wire 42 is moved from the first wire end 42A to the second wire end 42B, the second wire 42 crosses the first wire 41 from the first positive direction X1 side to the first negative direction X2 side.

[0067] Thus, the second wire 42 crosses over the first wire 41 at four locations, namely, the intersection location near 1.0 turn, the traversing location of the ninth turn of the second wire 42, the first traversing location 61, and the first intersection location 62. Moreover, at two of the four locations, when the second wire 42 is advanced 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.

[0068] <About mode switching characteristics>

[0069] The coil component 10 of the present embodiment, the coil component of Comparative Example 1, and the coil component of Comparative Example 2 were used as objects, and Ssd12 was measured as an index related to the mode conversion characteristics. The various dimensions of the coil component of Comparative Example 1 and the coil component of Comparative Example 2 are the same as those of the coil component 10 of the present embodiment. In addition, the material of the drum core and the material of the top plate in the coil component of Comparative Example 1 and the coil component of Comparative Example 2 are the same as those of the coil component 10 of the present embodiment. In addition, the number of windings of each wire in the coil component of Comparative Example 1 and the coil component of Comparative Example 2 is the same as that of the coil component 10 of the present embodiment, which is 21 turns. On the other hand, the intersection located closest to the second wire end side in the coil component of Comparative Example 1 is not located on the same side as the joint JP of each external electrode 30 when the central axis 11C is used as a reference, but is located on the outer peripheral surface of the winding core portion 11 facing the second negative direction Y2. Specifically, the intersection in the coil component of Comparative Example 1 is the twenty-first turn of the first wire and the second wire. In addition, the intersection portion located closest to the second wire end in the coil component of Comparative Example 2 is not located on the same side as the joint portion JP of each external electrode 30, but is located on the outer peripheral surface of the winding core portion 11 facing the third negative direction Z2, based on the central axis 11C. Specifically, the intersection portion in the coil component of Comparative Example 2 is the twenty-first turn of the first wire and the second wire. Twenty of each coil component were produced. That is, the number of samples in each coil component was set to 20.

[0070] In the measurement, the coil component 10 of the present embodiment, the coil component of the comparative example 1, and the coil component of the comparative example 2 are respectively mounted on a 3-port substrate in accordance with the Open Alliance. Furthermore, after SOLT calibration is performed on each coil component, the Ssd12 of each coil component is measured. Furthermore, the measurement results obtained from each coil component, that is, the average value of 20 measurement results, is set as a representative value of the measurement results.

[0071] In the coil component 10 of the present embodiment, when the measuring frequency is 500kHz, Ssd12 is -77.5dB. In addition, in the coil component of Comparative Example 1, when the measuring frequency is 500kHz, Ssd12 is -75.0dB. In addition, in the coil component of Comparative Example 2, when the measuring frequency is 500kHz, Ssd12 is -76.2dB. That is, it can be seen that when the first transverse portion 61 is on the third positive direction Z1 side, the value of Ssd12 can be suppressed. In other words, it can be seen that the case where the first transverse portion 61 and the joint JP of the external electrode 30 are located on the same side can suppress the value of Ssd12 compared to the case where the joint JP of the first transverse portion 61 and the external electrode 30 are located on different sides.

[0072] <Effects of the present embodiment>

[0073] (1) According to the above embodiment, in the portion where the first winding portion 51 of the second wire 42 is present, the first wire 41 and the second wire 42 are used to form a structure with more than two layers. On the other hand, the second winding portion 52 of the second wire 42 is not wound on the outer peripheral side of the first wire 41, so it forms a one-layer structure. In this way, the layer structure of the wire is asymmetric on the first flange portion 21 side and the second flange portion 22 side on the winding core portion 11. Due to such an asymmetric structure, the orientation of the coil component 10 can be easily determined by observing the appearance.

[0074] In addition, in the above-mentioned structure, the first winding portion 51 has a first traversing portion 61. In the front and rear turns of the first traversing portion 61, the positional relationship of the first wire 41 and the second wire 42 along the direction of the central axis 11C is opposite. By providing such an intersection portion in the first winding portion 51, the number of intersection portions to be provided in the second winding portion 52 in order to eliminate the twisting structure of the two wires can be reduced by one. Moreover, if the intersection portions with respect to the first wire 41 in the second winding portion 52 can be reduced, the portion where the second wire 42 overlaps the first wire 41 in the second winding portion 52 can be reduced. That is, the area where only the second wire 42 is continuously wound in a single-layer structure on the winding core portion 11 can be increased. Therefore, it is easy to distinguish whether each wire has a structure of two or more layers or a single-layer structure.

[0075] (2) In the above embodiment, the first winding portion 51 is located on the first flange portion 21 side relative to the center C of the winding core portion 11 in the direction along the central axis 11C. In this way, the portion where the first winding portion 51 exists and the portion where the second winding portion 52 exists are clearly separated by the center C of the winding core portion 11 as a boundary, so that the orientation of the coil component 10 can be easily determined by using an inspection device or the like.

[0076] (3) In the above embodiment, the first winding portion 51 includes a portion TL where the second wire 42 is wound over two or more layers on the outer peripheral side relative to the first wire 41. That is, the coil component 10 includes a portion where the coil is wound in a total of three layers. Thus, the appearance of the portion where the first winding portion 51 exists can be made more different from the appearance of the portion where the second winding portion 52 exists.

[0077] (4) In the above embodiment, the second winding portion 52 includes the final turn of the second wire 42. Moreover, the turn before the final turn of the second wire 42 and the turn before the final turn of the first wire 41 have a first intersection 62 that intersects each other. In this way, the first intersection 62 sandwiches the portion of the second wire 42 that is led toward the fourth external electrode 34 and the final turn until it reaches the second wire end 42B in the direction along the central axis 11C. That is, the first intersection 62 is located at a position away from the second wire end 42B. Therefore, in the manufacturing process, when the second wire end 42B of the second wire 42 is thermally compressed, the total amount of heat concentrated on the first intersection 62 can be reduced.

[0078] (5) In the above embodiment, the first intersection 62 is located on the third positive direction Z1 side relative to the central axis 11C. In other words, the first intersection 62 is located on the same side as the joint JP of the external electrode 30. According to this structure, as shown in the measurement result of Ssd12, 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 62 is located at a position other than the third positive direction Z1 side of the winding core 11, Ssd12 is improved.

[0079] (6) In the above embodiment, the direction in which the second wire 42 crosses the first wire 41 in the direction along the center axis 11C in the first crossing portion 61 is opposite to the direction in which the second wire 42 crosses the first wire 41 in the direction along the center axis 11C in the first intersection portion 62. In the portion where the wire crosses, the first wire 41 is pressed and wound around the second wire 42. Therefore, an external force in the direction in which the second wire 42 crosses acts on the first wire 41. The directions of crossing in the first crossing portion 61 and the first intersection portion 62 are different, and thus the external force acting on the first wire 41 is offset and acts. As a result, according to the above structure, the position of the first wire 41 is not easily misaligned, and the winding of the second wire 42 is stable.

[0080] (7) In the above embodiment, the second winding portion 52 has a portion PA that is separated from the adjacent wires in the direction along the central axis 11C. As described above, the core portion 11 is exposed from the portion PA that is separated from the adjacent wires. The material of each wire is different from the material of the core portion 11, so the optical properties of the wire and the core portion 11 are different. Therefore, by optically observing the core portion 11 in the section where the second winding portion 52 is located, the direction of the coil component 10 can be determined.

[0081] (8) In the above embodiment, the portion TP that finally contacts the outer peripheral surface of the winding core 11 when the second wire 42 is advanced from the first wire end 42A to the second wire end 42B is located in the region AP that is closest to the second flange 22 among the above three regions. That is, the final turn of the second wire 42 is located at a position close to the second flange 22. According to this structure, it is possible to prevent the portion of the second wire 42 from the portion TP that finally contacts the outer peripheral surface of the winding core 11 to the portion connected to the fourth external electrode 34 from becoming too long. As a result, it is possible to prevent the portion from being caught by other components in the portion from the portion TP that finally contacts the outer peripheral surface of the winding core 11 to the portion connected to the fourth external electrode 34, and it is possible to prevent the second wire 42 from being broken.

[0082] (9) In the above embodiment, the ninth turn of the second wire 42 has a cross-section with respect to the first wire 41. This configuration balances the parasitic capacitance before and after the cross-section and before and after the first cross-section 61, thereby improving electrical characteristics.

[0083] <Change Example>

[0084] The above-described embodiment and the following modified examples can be implemented in combination with each other within the scope of no technical contradiction.

[0085] <About changes related to coil components>

[0086] In the above 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 in the above embodiment.

[0087] 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.

[0088] 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 in 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 recessed in the central portion along the direction of the second axis Y and bifurcated.

[0089] 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.

[0090] The material and shape of the external electrode 30 are not limited to the examples in the above embodiment. The external electrode 30 only needs to 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.

[0091] <About changes related to wire materials>

[0092] The number of turns of the first wire 41 and the second wire 42 is not limited to 21. In addition, the number of turns of the first winding portion 51 and the number of turns of the second winding portion 52 are also not limited to the examples of the above-mentioned embodiment.

[0093] For example, in Figure 5 In the example shown, the 1.0 turn portion of the second wire 42 is directly wound around the outer peripheral surface of the winding core 11 without passing through 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 around the outer peripheral side relative to the first wire 41 from the second turn to the fifteenth turn.

[0094] In addition, Figure 5 In the example shown, the second wire 42 moves from the outer peripheral surface of the first wire 41 to the outer peripheral surface of the winding core 11 in the middle of the sixteenth turn. In addition, the second wire 42 is located on the outer peripheral surface of the winding core 11 in the 17.0 turns. Figure 5 In the example shown, the end position EP of the first winding portion 51 is the position of the portion less than 17.0 turns. Figure 5In the example shown, the first winding portion 51 is from the second turn to the sixteenth turn. Figure 5 In the example shown, the sixteenth turn of the second wire 42 is also transverse to the first wire 41, similarly to the above-described embodiment. Figure 5 In the illustrated example as well, the first wound portion 51 has the first crossing portion 61 which does not reach the same layer of the first wire 41 but strides over the first wire 41 in the section from the end portion EP to the portion one turn before.

[0095] exist Figure 5 In the example shown, on the outer peripheral surface of the winding core 11, before the second turn of the first wire 41, there are not only the first turn of the first wire 41 but also the second turn of the second wire 42. In this way, in the first turn of the two wires, the positional deviation of the first wire 41 to the first positive direction X1 side after the second turn can be restricted, so that the winding collapse of the first wire 41 and the second wire 42 after the second turn can be suppressed.

[0096] The first intersection 62 may be omitted from the second wire 42. For example, the first intersection 62 may be appropriately adopted depending on the number of intersections and crosses and the directions of the intersections and crosses at the portion where each wire is drawn out from the winding core 11 and reaches the external electrode 30.

[0097] The direction in which the second wire 42 crosses the first wire 41 in the direction along the central axis 11C in the first traversing portion 61 and the direction in which the second wire 42 crosses the first wire 41 in the direction along the central axis 11C in the first crossing portion 62 may be the same direction. The direction of the crossing can be appropriately changed depending on whether the wire crosses or not, the crossing direction of the crossing portion of the wire, and the like.

[0098] 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 there are a plurality of pairs of crossing portions where the second wire 42 crosses the first wire 41 in different directions, the twisting of the wire is eliminated as a whole.

[0099] The second wire 42 may have a further crossing portion other than the first crossing portion 62 of the above embodiment. The second wire 42 may have a further crossing portion other than the first crossing portion 61 of the above embodiment.

[0100] In the first intersection portion 62, the position 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 portion 62 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 portion 62 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. This point is also the same as the first cross-section portion 61.

[0101] The first winding portion 51 may not be located on the first flange portion 21 side relative to the center C of the winding core 11 in the direction along the central axis 11C. That is, the first winding portion 51 may also reach the second flange portion 22 side relative to the center C of the winding core 11 in the direction along the central axis 11C.

[0102] The first wound portion 51 may not include the portion TL where the second wire 42 is wound in two or more layers on the outer peripheral side with respect to the first wire 41. That is, the first wound portion 51 may not include the third layer.

[0103] The second wound portion 52 may not have the portion PA that is arranged apart from the adjacent wire rods in the direction along the central axis 11C.

[0104] The part TP that finally contacts the outer peripheral surface of the winding core 11 when the second wire 42 moves from the first wire end 42A to the second wire end 42B is not limited to the position of the area AP closest to the second flange 22 among the three areas. That is, the part TP that finally contacts the outer peripheral surface of the winding core 11 may also be located in the other two areas.

[0105] In the first intersection 62, the first wire 41 may cross the second wire 42 from the outer peripheral side. That is, if the first wire 41 and the second wire 42 cross each other, the wire located on the outer peripheral side in the first intersection 62 may be any wire.

[0106] <Note>

[0107] The following describes technical ideas derived from the above-mentioned embodiments and modified examples.

[0108] [1] A coil component, comprising: a drum core having a columnar winding core portion, a first flange portion connected to a first end of the winding core portion in a direction along a central axis, and a second flange portion connected to a second end of the winding core portion on a side opposite 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 the number of turns increases by one each time the first wire rod is wound around the central axis from the first wire end toward the second wire end, starting from the top. The number of turns of the first end of the second wire increases by 1 each time the first end of the second wire is wound around the central axis toward the second end. The second wire comprises: a first winding portion, which is wound on the outer peripheral side of the first wire over a plurality of turns; and a second winding portion, which is located closer to the second end than the first winding portion, at least a portion of which is wound on the outer peripheral surface of the winding core portion, and the range of continuous winding on the outer peripheral side of the first wire is less than 1.0 turn. When the second wire is advanced from the first end to the second end in the first winding portion, when the position closest to the second end in the first winding portion is set as the end position of the first winding portion, the first winding portion has a first traversing portion, and the first traversing portion crosses over the first wire without reaching the same layer of the first wire in the interval from the end position of the first winding portion to the position before the first turn.

[0109] [2] The coil component according to [1], wherein the first winding portion is located on the first flange portion side relative to the center of the winding core portion in a direction along the central axis.

[0110] [3] The coil component according to [1] or [2], wherein the first wound portion includes a portion in which the second wire is wound in two or more layers on the outer peripheral side of the first wire.

[0111] [4] A coil component according to any one of [1] to [3], wherein when the turn including the portion that finally contacts the outer peripheral surface of the winding core portion when moving from the first wire end to the second wire end is set as the final turn, the second winding portion includes the final turn of the second wire, and the previous turn of the final turn of the first wire and the previous turn of the final turn of the second wire have a first intersection portion that intersects each other.

[0112] [5] A coil component according to [4], wherein, when a specific direction orthogonal to the central axis is set 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, and the first intersection is located on the outer peripheral surface of the winding core portion on the positive direction side relative to the central axis.

[0113] [6] A coil component according to [4] or [5], wherein, when the second wire is moved 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 in the first crossing portion is opposite to the direction in which the second wire crosses over the first wire in the direction along the center axis in the first crossing portion.

[0114] [7] The coil component according to any one of [1] to [6], wherein the second winding portion has a portion that is separated from an adjacent wire member on at least one side along the direction of the central axis.

[0115] [8] A coil component according to any one of items [1] to [7], wherein when the winding core portion is divided into three equal regions along the direction of the central axis, the portion that finally contacts the outer peripheral surface of the winding core portion when the second wire material moves from the first wire end to the second wire end is located in the region closest to the second flange portion among the three regions.

Claims

1. A coil component, wherein: have: A drum core having a columnar winding core portion, a first flange portion connected to a first end of the winding core portion along a central axis, and a second flange portion connected to a second end of the winding core portion on a side opposite to the first end; A first external electrode and a second external electrode are located on a surface of the first flange portion; A third external electrode and a fourth external electrode are located on a surface of the second flange portion; A first wire, wound on the winding core, with a first wire end connected to the first external electrode and a second wire end connected to the third external electrode; as well as A second wire is wound around the winding core in the same direction as the first wire, a first wire end is connected to the second external electrode, and a second wire end is connected to the fourth external electrode, The number of turns increases by 1 each time the first wire rod is wound around the central axis from the first wire end toward the second wire end. The number of turns increases by 1 each time the second wire rod is wound from the first wire end toward the second wire end around the central axis. The second wire material comprises: a first winding portion in which the second wire is wound around the first wire over a plurality of turns on the outer circumference thereof; and The second winding portion is located closer to the second wire end than the first winding portion, at least a portion of the second wire is wound around the outer peripheral surface of the winding core portion, and the second wire is continuously wound around the outer peripheral side of the first wire by less than 1.0 turns. When the second wire is caused to travel from the first wire end to the second wire end in the first winding portion, when the end of the second wire located closest to the second wire end in the first winding portion is set as the end position of the first winding portion, the first winding portion has a first transverse portion, and the second wire does not reach the same layer as the first wire but crosses the first wire in the interval from the end position of the first winding portion to the position before the first turn.

2. The coil component according to claim 1, wherein The first winding portion is located on the first flange portion side relative to the center of the winding core portion in the direction along the central axis.

3. The coil component according to claim 1 or 2, wherein: The first wound portion includes a portion in which the second wire is wound over two or more layers on the outer peripheral side of the first wire.

4. The coil component according to any one of claims 1 to 3, wherein: When a turn including a portion that contacts the outer peripheral surface of the winding core portion at the last time when the wire moves from the first wire end to the second wire end is defined as a final turn, The second winding portion includes the final turn of the second wire, A turn before the final turn of the first wire and a turn before the final turn of the second wire have a first intersection portion that intersects with each other.

5. The coil component according to claim 4, 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 with respect 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.

6. The coil component according to claim 4 or 5, wherein: When the second wire is moved from the first end to the second end, a direction in which the second wire crosses over the first wire along the center axis in the first crossing portion is opposite to a direction in which the second wire crosses over the first wire along the center axis in the first crossing portion.

7. The coil component according to any one of claims 1 to 6, wherein: The second winding portion has a portion that is arranged apart from an adjacent wire member on at least one side in a direction along the central axis.

8. The coil component according to any one of claims 1 to 7, wherein: When the winding core is equally divided into three regions along the direction of the central axis, the portion that finally contacts the outer peripheral surface of the winding core when the second wire runs from the first wire end to the second wire end is located in the region closest to the second flange portion among the three regions.

Images