Coil parts

Abstract

To provide a coil component that reduces the occurrence of positional displacement of a wire wound to form a plurality of layers around a winding core.SOLUTION: A first winding area Z1 and a second winding area Z2 are arranged along an axial direction 6 of a winding core part 5. In the first winding area Z1, a first wire 3 is wound to form a first layer. A second wire 4 is wound to form a second layer while being fitted to a recess formed between adjacent turns of the first wire 3, is then returned from an end on a side of a second end to a side of a first end and guided to an outer peripheral side of the second layer, is then wound to form a third layer, is then guided to the position of the second layer on an outer peripheral side of the first layer, and is then wound to form the second layer while being fitted to a recess formed between adjacent turns of the first wire 3 on the first layer. In the second winding area Z2, the layer located with the first wire 3 is replaced with the layer located with the second wire 4 in the first winding area Z1, and vice versa.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to coil components, and more particularly to improvements in the winding pattern of wire in a wound coil component having a structure in which two wires are wound around a winding core to form multiple layers. [Background technology]

[0002] In this case, for each of the first wire and the second wire wound around the winding core, the n-th turn is expressed as "turn Tn" (n is a natural number).

[0003] Regarding the amount of misalignment between the first wire and the second wire, for example, if the turn Tn of one wire fits into the recess between the turn Tn and the turn Tn+1 of the other wire, the amount of misalignment is "0.5 turns." If the turn Tn+2 of the other wire fits into the recess between the turn Tn and the turn (n+1) of the other wire, the amount of misalignment is "1.5 turns." If the turn Tn+3 of the other wire fits into the recess between the turn Tn and the turn (n+1) of the one wire, the amount of misalignment is "2.5 turns."

[0004] Regarding the direction of misalignment between the first wire and the second wire, if a turn of the second wire is closer to the end of the winding direction than the same turn of the first wire, the misalignment is considered to be positive, and a "+" is placed before the number representing the amount of misalignment. Conversely, the misalignment is considered to be negative, and a "-" is placed before the number representing the amount of misalignment.

[0005] It does not matter whether the wire turns are counted from the first end of the winding core or from the second end, and even if the direction of counting the turns is reversed, the configuration is essentially the same.

[0006] Furthermore, in this application, of the multiple layers formed by the wire wound around the winding core, the layer closest to the circumferential surface of the winding core, i.e., the layer at least partially in contact with the circumferential surface of the winding core, is referred to as the first layer, the layer wound around the outer periphery of the first layer while fitting into recesses formed between adjacent turns of wire in the first layer, is referred to as the second layer, and the layer wound around the outer periphery of the second layer while fitting into recesses formed between adjacent turns of wire in the second layer, is referred to as the third layer. Note that the reason why the first layer, which is the layer closest to the circumferential surface of the winding core, is said to be in at least partial contact with the circumferential surface of the winding core is because the wire does not normally contact the circumferential surface of the winding core over its entire length, but rather contacts only the ridges of a winding core with a rectangular cross section, with the remaining portions slightly floating above the circumferential surface of the winding core.

[0007] A typical example of a coil component to which the present invention is directed is a common mode choke coil.

[0008] A common mode choke coil of interest to this invention is described, for example, in Japanese Patent No. 6327397 (Patent Document 1). Fig. 15(A) is a cross-sectional view that schematically shows a characteristic configuration of the winding state of two wires 81 and 82 provided in a coil component 80 that constitutes the common mode choke coil described in Patent Document 1. Fig. 15(A) corresponds to Fig. 2, Fig. 7, or Fig. 8 in Patent Document 1. Fig. 15(B) is intended to explain the problem described below.

[0009] 15(A) and 15(B), the cross section showing the first wire 81 is shaded to clearly distinguish the first wire 81 from the second wire 82. The first wire 81 and the second wire 82 are spirally wound around the winding core 83 from a first end 84 of the winding core 83 toward an opposite second end 85 with substantially the same number of turns. The first wire 81 is wound in a state where it forms a first layer in contact with the circumferential surface of the winding core 83, and the second wire 82 is wound in a state where it forms a second layer outside the first layer with most of the second wire 82 fitting into recesses formed between adjacent turns of the first wire 81.

[0010] As mentioned above, the majority of the second wire 82 is wound to form the second layer outside the first layer because some turns of the second wire 82, for example, turns Tm and Tm+1 (m is a natural number), are wound so as to contact the circumferential surface of the winding core portion 83.

[0011] 15(A) and 15(B), each of the multiple turns of the first wire 81 and each of the multiple turns of the second wire 82 are connected by a line segment. In this way, the turns connected by a line segment are the same numbered turns counting from the first end 84.

[0012] The coil component 80 described in Patent Document 1 was developed with the aim of reducing the mode conversion characteristics in a common mode choke coil, and the embodiment shown in FIG. 15(A) has the following features.

[0013] That is, when expressed by the number of turns n counted from the first end 84 side of each of the first wire 81 and the second wire 82, the coil device 80 has the following: (1) A +0.5 turn shift region 87 in which the turn Tn of the second wire 82 is fitted into a recess between the turn Tn and the turn Tn+1 of the first wire 81, causing a shift of 0.5 turns in the positive direction between the first wire and the second wire; (2) A −1.5 turn shift region 88 in which the first wire 81 and the second wire 82 are shifted by 1.5 turns in the negative direction by fitting the turn Tn+2 of the second wire 82 into the recess between the turn Tn and the turn Tn+1 of the first wire 81; (3) a transition region 89 that transitions from the +0.5 turn shift region 87 to the −1.5 turn shift region 88; It has the following characteristics.

[0014] The sum of the number of turns of the second wire 82 located in the 0.5 turn shift region 87 is not less than two times and not more than five times the sum of the number of turns of the second wire 82 located in the 1.5 turn shift region 88.

[0015] With this configuration, the capacitance generated between the first wire 81 and the second wire 82 can be balanced across the first wire 81 and the second wire 82, reducing the effect of stray capacitance generated between the first wire 81 and the second wire 82. Therefore, in a common mode choke coil, for example, the mode conversion characteristics can be reduced. [Prior art documents] [Patent documents]

[0016] [Patent Document 1] Patent No. 6327397 Summary of the Invention [Problem to be solved by the invention]

[0017] In the wound state shown in FIG. 15(A), focusing on the second wire 82, the turn Tm+2 at the beginning of the −1.5-turn shift region 88 is not in contact with any wire on the side of its first end 84, so the turn Tm+2 is likely to shift in the direction indicated by the arrow 90 in FIG. 15(A). Similarly, the turn Tm+1 at the end of the transition region 89 is not in contact with any wire on the side of its first end 84. As a result, as shown in FIG. 15(B), the turn Tm+2 may climb over the turn Tm+1 and fall between the turns Tm and Tm+1. Although not shown in FIG. 15(B), if the distance between the turns Tm and Tm+1 is wider, the turn Tm+2 may come into contact with the circumferential surface of the winding core 83.

[0018] The above-described inadvertent step-off of turn Tm+2, i.e., the inadvertent misalignment of turn Tm+2 from the second layer toward the first layer, can occur in the completed coil device 80. However, if this occurs during the process of winding second wire 82 from first end 84 toward second end 85, subsequent turns Tm+3, ... will be sequentially misaligned. As a result, misalignment region 88 will no longer be a -1.5-turn misalignment region, but will instead be, for example, a -2.5-turn misalignment region. As a result, the balance of capacitance generated between first wire 81 and second wire 82 will be disrupted, which may deteriorate the mode conversion characteristics.

[0019] The same type of misalignment problem is not limited to common mode choke coils, but can also be encountered in, for example, a wire-wound chip transformer that also includes a first wire and a second wire.

[0020] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a coil component in which misalignment of the wire wound around the core in multiple layers is less likely to occur. [Means for solving the problem]

[0021] The present invention is directed to a coil component comprising a core including a winding core having a first end and a second end opposite to each other in the axial direction, and a first wire and a second wire wound spirally around the winding core with substantially the same number of turns.

[0022] In the following, of the multiple layers formed by the wire wound around the winding core, the layer closest to the peripheral surface of the winding core will be referred to as the first layer, the layer wound around the outer periphery of the first layer while fitting into the recesses formed between adjacent turns of the wire in the first layer will be referred to as the second layer, and the layer wound around the outer periphery of the second layer while fitting into the recesses formed between adjacent turns of the wire in the second layer will be referred to as the third layer.

[0023] This invention has a first, second, and third aspects, depending on subtle differences in the winding state of the first wire and the second wire. The first, second, fourth to tenth embodiments described below have the features of the first aspect, the third and eleventh embodiments have the features of the second aspect, and the twelfth embodiment has the features of the third aspect.

[0024] The first aspect is characterized by the following configuration.

[0025] A plurality of winding regions including at least a first winding region and a second winding region, in which the first wire and the second wire are wound in different states from each other, are arranged along the axial direction.

[0026] Volume 1 area is, (1-1) a first winding portion in which a first wire is wound in a first layer from a first end to a second end; (1-2) a second winding portion in which the second wire is wound in a second layer from the first end toward the second end to a midpoint of the range in which the first winding portion extends; (1-3) a first transposition portion where the second wire is redirected from the end on the second end side of the second winding portion to the first end side and guided to the position of the third layer; (1-4) a third winding portion in which the second wire is connected to the first transposition portion and wound N turns (N is a natural number) in the third layer; (1-5) a second transition portion where the second wire is guided from the third winding portion to a position of the second layer; (1-6) a fourth winding portion in which the second wire is connected to the second transposition portion and wound toward the second end portion in the second layer; It has.

[0027] Between the first winding region and the second winding region, the first wire and the second wire interchange the layers in which they are located.

[0028] Volume 2 area is, (2-1) a fifth winding portion in which the second wire is wound in a first layer from the first end toward the second end; (2-2) a sixth winding portion in which the first wire is wound in the second layer from the first end toward the second end to a part of the range in which the fifth winding portion extends; (2-3) a third transposition portion where the first wire is redirected from the end of the sixth winding portion on the second end side to the first end side and guided to the position of the third layer; (2-4) a seventh winding portion in which the first wire is connected to the third transposition portion and wound M turns (M is a natural number) in the third layer; (2-5) a fourth transition portion where the first wire is guided from the seventh winding portion to a position of the second layer; (2-6) an eighth winding portion in which the first wire is connected to the fourth transposition portion and wound toward the second end portion in the second layer; It has.

[0029] With regard to the direction of deviation between the first wire and the second wire, if a turn of the second wire is closer to the second end than the same turn of the first wire, the deviation is considered to be positive, and if the opposite is true, the deviation is considered to be negative. In each of the first winding region and the second winding region, there are positive deviation regions where the turns between the first wire and the second wire are deviation in the positive direction and negative deviation regions where the turns are deviation in the negative direction.

[0030] The second aspect is characterized by the following configuration.

[0031] A plurality of winding regions including at least a first winding region and a second winding region, in which the first wire and the second wire are wound in different states from each other, are arranged along the axial direction.

[0032] Volume 1 area is, (1-1) a first winding portion in which a first wire is wound in a first layer from a first end to a second end; (1-2) a second winding portion in which the second wire is wound in a second layer from the first end toward the second end to a midpoint of the range in which the first winding portion extends; (1-3) a first transposition portion where the second wire is redirected from the end on the second end side of the second winding portion to the first end side and guided to the position of the third layer; (1-4) a third winding portion in which the second wire is connected to the first transposition portion and wound N turns (N is a natural number) in the third layer; (1-5) a second transition portion where the second wire is guided from the third winding portion to the position of the first layer; (1-6) a fourth winding portion in which the second wire is connected to the second transposition portion and wound toward the second end portion in the first layer; (1-7) a third transposition portion where the first wire is redirected from the end of the first winding portion on the second end side to the first end side and guided to the position of the second layer; (1-8) a fifth winding portion in which the first wire is connected to the third transposition portion and wound toward the second end portion in the second layer; It has.

[0033] Between the first winding region and the second winding region, the first wire and the second wire interchange the layers in which they are located.

[0034] Volume 2 area is, (2-1) a sixth winding portion in which the second wire is wound in a first layer from the first end toward the second end; (2-2) a seventh winding portion in which the first wire is wound in the second layer from the first end toward the second end to a part of the range in which the sixth winding portion extends; (2-3) a fourth transposition portion where the first wire is redirected from the end on the second end side of the seventh winding portion to the first end side and guided to the position of the third layer; (2-4) an eighth winding portion in which the first wire is connected to the fourth transposition portion and wound M turns (M is a natural number) in the third layer; (2-5) a fifth transition portion where the first wire is guided from the eighth winding portion to the position of the first layer; (2-6) a ninth winding portion in which the first wire is connected to the fifth transposition portion and wound toward the second end portion in the first layer; (2-7) a sixth transition portion where the second wire is redirected from the end on the second end side of the sixth winding portion to the first end side and guided to the position of the second layer; (2-8) a tenth winding portion in which the second wire is connected to the sixth transposition portion and wound toward the second end portion in the second layer; It has.

[0035] With regard to the direction of deviation between the first wire and the second wire, if a turn of the second wire is closer to the second end than the same turn of the first wire, the deviation is considered to be positive, and if the opposite is true, the deviation is considered to be negative. In each of the first winding region and the second winding region, there are positive deviation regions where the turns between the first wire and the second wire are deviation in the positive direction and negative deviation regions where the turns are deviation in the negative direction.

[0036] The second phase differs from the first phase in that the second wire is led from the third winding to a position on the first layer rather than the second layer at the second transposition, and the first wire is led from the seventh winding to a position on the first layer rather than the second layer at the fourth transposition.

[0037] The third aspect is characterized by the following configuration.

[0038] A plurality of winding zones including at least a first winding zone and a second winding zone are arranged along the axial direction.

[0039] Volume 1 area is, (1-1) a first winding portion in which a first wire is wound in a first layer from a first end to a second end; (1-2) a second winding portion in which the second wire is wound in a second layer from the first end toward the second end to a midpoint of the range in which the first winding portion extends; (1-3) a first transposition portion where the second wire is redirected from the end on the second end side of the second winding portion to the first end side and guided to the position of the third layer; (1-4) a third winding portion in which the second wire is connected to the first transposition portion and wound N turns (N is a natural number) in the third layer; (1-5) a second transition portion where the second wire is guided from the third winding portion to the position of the first layer; (1-6) a fourth winding portion in which the second wire is connected to the second transposition portion and wound toward the second end portion in the first layer; (1-7) a third transposition portion where the first wire is redirected from the end of the first winding portion on the second end side to the first end side and guided to the position of the second layer; (1-8) a fifth winding portion in which the first wire is connected to the third transposition portion and wound toward the second end portion in the second layer; It has.

[0040] In the first winding region, the layer on which the first wire is located alternates between the first winding portion and the fifth winding portion, and the layer on which the second wire is located alternates between the second winding portion and the fourth winding portion.

[0041] Volume 2 area is, (2-1) a sixth winding portion in which the first wire is wound in a first layer from the first end toward the second end; (2-2) a seventh winding portion in which the second wire is wound in the second layer from the first end toward the second end to a part of the range in which the sixth winding portion extends; (2-3) a fourth transposition portion where the second wire is redirected from the end on the second end side of the seventh winding portion to the first end side and guided to the position of the third layer; (2-4) an eighth winding portion in which the second wire is connected to the fourth transposition portion and wound M turns (M is a natural number) in the third layer; (2-5) a fifth transition portion where the second wire is guided from the eighth winding portion to the position of the first layer; (2-6) a ninth winding portion in which the second wire is connected to the fifth transposition portion and wound toward the second end portion in the first layer; (2-7) a sixth transition portion where the first wire is redirected from the end of the sixth winding portion on the second end side to the first end side and guided to the position of the second layer; (2-8) a tenth winding portion in which the first wire is connected to the sixth transposition portion and wound toward the second end portion in the second layer; It has.

[0042] In the second winding region, the layer on which the first wire is located alternates between the sixth winding portion and the tenth winding portion, and the layer on which the second wire is located alternates between the seventh winding portion and the ninth winding portion.

[0043] Regarding the direction of deviation between the first wire and the second wire, if a turn of the second wire is closer to the second end than the same turn of the first wire, the deviation is considered to be positive, and if the opposite is true, the deviation is considered to be negative. Each of the first winding region and the second winding region has a positive deviation region where the turns are deviated in the positive direction between the first wire and the second wire, and a negative deviation region where the turns are deviated in the negative direction.

[0044] The first and second phases differ in that, between the first winding region and the second winding region, the first wire and the second wire switch the layers in which they are located, whereas, in the third phase, within each of the first winding region and the second winding region, the first wire and the second wire switch the layers in which they are located. Coil parts. [Effects of the Invention]

[0045] According to this invention, the wire located in the second layer, which is prone to inadvertent step-down, is redirected from the end on the second end side to the first end side and led to the position in the third layer, where it is wound N or M turns, thereby making it less likely for the wire located in the second layer to become misaligned.

[0046] In addition, each of the first winding region and the second winding region has a positive direction shift region where the turns are shifted in the positive direction between the first wire and the second wire, and a negative direction shift region where the turns are shifted in the negative direction, thereby reducing the influence of stray capacitance occurring between the first wire and the second wire.

[0047] Furthermore, according to the present invention, the wires located in the first layer and the wires located in the second layer are interchanged between the first wire and the second wire, thereby making it possible to reduce the difference in length between the first wire and the second wire.

[0048] As a result, for example, in a common mode choke coil, the mode conversion characteristics can be reduced. [Brief explanation of the drawings]

[0049] [Figure 1] 1 is an external view of a coil component 1 according to a first embodiment of the present invention, showing the surface facing the mounting board side. [Figure 2] 3, which is a cross-sectional view taken along line AA in FIG. 3, showing a part of a core 2 having a winding core portion 5 around which the first wire 3 and the second wire 4 are wound, and schematically showing the winding state of the first wire 3 and the second wire 4 in the coil device 1 shown in FIG. 1. [Figure 3] 2 is a development view that schematically shows the circumferential surface of a winding core 5 around which a first wire 3 and a second wire 4 are wound in the coil device 1 shown in FIG. 1. FIG. [Figure 4] 10 is a cross-sectional view schematically showing a part of a winding core 5 around which a first wire 3 and a second wire 4 are wound in a coil device according to a second embodiment of the present invention. FIG. [Figure 5] 10 is a cross-sectional view schematically showing a part of a winding core 5 around which a first wire 3 and a second wire 4 are wound in a coil device according to a third embodiment of the present invention. FIG. [Figure 6] 10 is a cross-sectional view schematically showing a part of a winding core 5 around which a first wire 3 and a second wire 4 are wound in a coil device according to a fourth embodiment of the present invention. FIG. [Figure 7] 10 is a cross-sectional view schematically showing a part of a winding core 5 around which a first wire 3 and a second wire 4 are wound in a coil device according to a fifth embodiment of the present invention. FIG. [Figure 8] 10 is a cross-sectional view schematically showing a part of a winding core 5 around which a first wire 3 and a second wire 4 are wound in a coil device according to a sixth embodiment of the present invention. FIG. [Figure 9] 10 is a cross-sectional view schematically showing a part of a winding core 5 around which a first wire 3 and a second wire 4 are wound in a coil device according to a seventh embodiment of the present invention. FIG. [Figure 10] 13 is a cross-sectional view schematically showing a part of a winding core 5 around which a first wire 3 and a second wire 4 are wound in a coil device according to an eighth embodiment of the present invention. FIG. [Figure 11]13 is a cross-sectional view schematically showing a part of a winding core 5 around which a first wire 3 and a second wire 4 are wound in a coil device according to a ninth embodiment of the present invention. FIG. [Figure 12] 16 is a cross-sectional view schematically showing a part of a winding core 5 around which a first wire 3 and a second wire 4 are wound in a coil device according to a tenth embodiment of the present invention. FIG. [Figure 13] 16 is a cross-sectional view schematically showing a part of a winding core 5 around which a first wire 3 and a second wire 4 are wound in a coil device according to an eleventh embodiment of the present invention. FIG. [Figure 14] 23 is a cross-sectional view schematically showing a part of a winding core 5 around which a first wire 3 and a second wire 4 are wound in a coil device according to a twelfth embodiment of the present invention. FIG. [Figure 15] 1A and 1B are cross-sectional views showing a schematic view of the winding state of two wires 81 and 82 provided in a coil device 80 described in Patent Document 1, where (A) shows the characteristic configuration of the winding state of the two wires 81 and 82, and (B) is intended to explain the problem that the present invention aims to solve. DETAILED DESCRIPTION OF THE INVENTION

[0050] [First embodiment] 1 shows a surface of a coil component 1 according to a first embodiment of the present invention that faces a mounting board (not shown). The coil component 1 serves as a common mode choke coil.

[0051] The coil component 1 includes a drum-shaped core 2 and a first wire 3 and a second wire 4, each of which constitutes an inductor. The core 2 is made of a non-conductive material, more specifically, a ferrite such as a Ni-Zn ferrite, or a resin containing ferrite powder or metal magnetic powder.

[0052] The core 2 includes a winding core 5 and a first flange 9 and a second flange 10 that protrude from a first end 7 and a second end 8 that are opposite to each other in the axial direction 6 of the winding core 5. The cross section of the winding core 5 that is perpendicular to the axial direction 6 is rectangular. Note that the ridges of the rectangular cross section of the winding core 5 may be chamfered, or the cross section of the winding core 5 may be another polygonal shape such as a hexagon, a circle, an ellipse, or an appropriate combination of these.

[0053] The first flange 9 and the second flange 10 are shaped like a rectangular pillar. The first flange 9 has a bottom surface 11 facing the mounting board, a top surface 13 (see FIG. 2 ) facing the opposite direction from the bottom surface 11, an inner end surface 15 on which the first end 7 of the winding core 5 is located, an outer end surface 17 opposite the inner end surface 15 and facing outward, and a first side surface 19 and a second side surface 20 connecting the bottom surface 11 and the top surface 13 and the inner end surface 15 and the outer end surface 17. Similarly, second flange 10 has a bottom surface 12 facing the mounting board, a top surface 14 (see FIG. 2) facing the opposite direction from bottom surface 12, an inner end surface 16 on which second end 8 of winding core 5 is located, an outer end surface 18 opposite inner end surface 16 and facing outward, and a first side surface 21 and a second side surface 22 connecting bottom surface 12 and top surface 14 and connecting inner end surface 16 and outer end surface 18. Ridge portions of first flange 9 and second flange 10 may be chamfered.

[0054] The coil component has four or more terminal electrodes. In this embodiment, the coil component 1 has four terminal electrodes 23 to 26. A first terminal electrode 23 and a third terminal electrode 25 are provided on the lower surface 11 of the first flange 9, and a second terminal electrode 24 and a fourth terminal electrode 26 are provided on the lower surface 12 of the second flange 10. Although not shown, the first terminal electrode 23 and the third terminal electrode 25 may extend to a part of the outer end surface 17 of the first flange 9, and the second terminal electrode 24 and the fourth terminal electrode 26 may extend to a part of the outer end surface 18 of the second flange 10.

[0055] The terminal electrodes 23 to 26 are formed, for example, by baking a conductive paste containing silver as a conductive component onto the lower surfaces 11 and 12, evaporating silver onto the portions extending to the outer end surfaces 17 and 18, and then plating the underlying conductive film with copper, nickel, and tin in that order. The terminal electrodes 23 to 26 may also be provided by attaching metal terminals made of conductive metal plates to the core 2 using, for example, an epoxy adhesive.

[0056] The first wire 3 and the second wire 4 are wound spirally around the winding core 5. In FIG. 1, the first wire 3 is shaded to clearly distinguish the first wire 3 from the second wire 4. The winding state of the first wire 3 and the second wire 4 will be described in detail later. The first wire 3 and the second wire 4 each have a linear central conductor made of a highly conductive metal such as copper, silver, or gold, and the central conductor is covered with an electrically insulating coating made of a resin such as polyurethane or polyamideimide. The diameter of the linear central conductor is not particularly limited. The number of turns of the first wire 3 and the second wire 4 is also not particularly limited. Preferably, the diameter of the first wire 3 and the second wire 4 is 20 to 100 μm.

[0057] The respective ends of the first wire 3 are connected to a first terminal electrode 23 and a second terminal electrode 24, and the respective ends of the second wire 4 are connected to a third terminal electrode 25 and a fourth terminal electrode 26. These connections are made by, for example, thermocompression bonding.

[0058] The coil device 1 may further include a top plate 27. The top plate 27 cooperates with the core 2 to form a closed magnetic circuit and is made of the same type of ferrite as the core 2, a non-conductive magnetic material other than ferrite, or a resin containing ferrite powder or metal magnetic powder. The top plate 27 is placed between the first flange 9 and the second flange 10 of the core 2 and bonded to the top surface 13 of the first flange 9 and the top surface 14 of the second flange 10 via an adhesive. The adhesive is preferably a thermosetting epoxy resin or a composite magnetic resin made by adding metal magnetic powder or ferrite powder with a particle size of 0.1 to 10 μm to a thermosetting epoxy resin. An inorganic filler, such as a silica filler or an inorganic magnetic powder, may be added to the adhesive to improve thermal shock resistance. The adhesive may be applied by dipping the top surfaces 13 and 14 of the flanges 9 and 10 of the core 2 in the adhesive, or by dispensing or printing the adhesive on the surface of the top plate 27 facing the core 2, or the like.

[0059] A resin coating may be applied instead of the top plate 27. Furthermore, neither the top plate 27 nor the coating may be provided.

[0060] The coil device 1 is manufactured, for example, as follows.

[0061] To manufacture the core 2, for example, ferrite powder is press-molded in a mold, the resulting molded body is fired, and after firing, burrs are removed by barrel polishing.

[0062] Next, in order to provide the terminal electrodes 23 to 26 on the obtained core 2, a base conductor film is formed, and then barrel plating is performed.

[0063] Next, the wires 3 and 4 are discharged from a nozzle and wound around the winding core portion 5 of the core 2. To achieve a winding state of the wires 3 and 4, which will be described in detail later, for example, the second wire 4 is wound around the first wire 3 in the middle of winding it, or the first wire 3 is wound around the second wire 4 in the middle of winding it. After winding, the ends of the first wire 3 are thermocompression-bonded to the first terminal electrode 23 and the second terminal electrode 24 by a heater tip, and the ends of the second wire 4 are thermocompression-bonded to the third terminal electrode 25 and the fourth terminal electrode 26. Excess portions of the wires 3 and 4 connected to the terminal electrodes 23 to 26 are cut off and removed by a cutting blade.

[0064] Thereafter, top plate 27 is adhered to core 2 with an adhesive. In this way, coil component 1 is completed. The dimensions of coil component 1 are not particularly limited, but for example, the dimension in axial direction 6 is 3.2 mm, the dimension in width direction (vertical direction in FIG. 1) is 2.5 mm, and the dimension in height direction (direction perpendicular to the plane of FIG. 1) is 2.5 mm.

[0065] The winding state of the first wire 3 and the second wire 4 in the coil device 1 shown in Fig. 1 will be described mainly with reference to Fig. 2 and Fig. 3. Fig. 2 shows a cross-sectional view of a portion of the winding core 5 around which the first wire 3 and the second wire 4 are wound. Fig. 3 shows a developed view of the circumferential surface of the winding core 5 around which the first wire 3 and the second wire 4 are wound.

[0066] 2, the cross section showing the first wire 3 is shaded to clearly distinguish between the first wire 3 and the second wire 4. The first wire 3 and the second wire 4 are wound spirally around the winding core 5 with substantially the same number of turns.

[0067] In FIG. 2, each of the multiple turns of the first wire 3 and each of the multiple turns of the second wire 4 are connected by line segments. In this way, turns connected by line segments are the same turn when counted from the first end 7. Numbers are written under each turn of the wire 3 or 4 located in the first layer. These numbers indicate the ordinal number of each turn of the wire 3 or 4 located in the first layer. Therefore, each turn of one of the wires 3 and 4 connected by a line segment to each turn of the other wire 3 or 4 is also the same ordinal number as the number mentioned above. In the wound state shown in FIG. 2, both the first wire 3 and the second wire 4 have turns T1 to T28.

[0068] The above description of the drawing method for FIG. 2 also applies to FIGS. 4 to 14, which will be described later.

[0069] As described above, the first flange portion 9 and the second flange portion 10 are rectangular prism-shaped and each have a peripheral surface made up of bottom surfaces 11 and 12, top surfaces 13 and 14, first side surfaces 19 and 21, and second side surfaces 20 and 22. On the other hand, the winding core portion 5 has a rectangular cross section perpendicular to the axial direction 6, and four surfaces are formed on its peripheral surface. Therefore, the four surfaces of the peripheral surface of the winding core portion 5 that face in the same direction as the bottom surface, top surface, first side surface, and second side surface of the flange portions 9 and 10 will similarly be referred to as the "bottom surface," "top surface," "first side surface," and "second side surface."

[0070] As shown in Fig. 3, the winding core 5 has a circumferential surface including a bottom surface 29, a top surface 30, a first side surface 31, and a second side surface 32. Fig. 2 shows a cross section taken along line AA in Fig. 3, i.e., a cross section of the wires 3 and 4 on the top surface 30 of the winding core 5.

[0071] In FIG. 3 , the first wire 3 is indicated by a thick dotted line, and the second wire 4 is indicated by a thick solid line. In reality, most of the wires in the first layer are hidden by the wires in the second layer. However, in the developed view of FIG. 3 , the thick dotted line indicates the position of the central axis of the first wire 3, and the thick solid line indicates the position of the central axis of the second wire 4. Therefore, the first wire 3 in the first layer and the second wire 4 in the second layer are shown adjacent to each other, and the second wire 4 in the first layer and the first wire 3 in the second layer are shown adjacent to each other. As can be seen from FIG. 3 , the wire 3 or 4 in the third layer and the adjacent wire 3 or 4 in the second layer are also shown adjacent to each other. Note that the turn of the wire 3 or 4 in the first layer directly below the turn of the wire 3 or 4 in the third layer is omitted from the illustration.

[0072] In the coil device 1 shown in Figures 1 to 3, multiple winding regions in which the first wire 3 and the second wire 4 are wound in different states, for example, a first winding region Z1 and a second winding region Z2, are arranged along the axial direction 6 of the winding core portion 5.

[0073] Referring primarily to FIG. 2, the first winding region Z1 is (1-1) A first winding portion W1 (turns T1 to T14) in which the first wire 3 is wound in a first layer from the first end 7 to the second end 8; (1-2) a second winding portion W2 (turns T1 to T8) in which the second wire 4 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the first winding portion W1 extends; (1-3) a first transposition portion R1 (turn T8 → T9) in which the second wire 4 is redirected from the end of the second winding portion W2 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (1-4) A third winding portion W3 (turns T9 to T10) in which the second wire 4 is connected to the first transposition portion R1 and wound N turns (here, 2 turns) in the third layer; (1-5) a second transposition portion R2 (turn T10 → T11) where the second wire 4 is guided from the third winding portion W3 to the position of the second layer; (1-6) a fourth winding portion W4 (turns T11 to T14) in which the second wire 4 is connected to the second transposition portion R2 and wound toward the second end 8 in the second layer; It has.

[0074] Next, the second winding zone Z2 is arranged following the first winding zone Z1. Between the first winding zone Z1 and the second winding zone Z2, the first wire 3 and the second wire 4 switch layers. This switching zone S is shown in FIG. 3. In the switching zone S, the first wire 3 is led into the second layer from the end of the first winding zone W1 on the side of the second end 8, and the second wire 4 is led into the first layer from the end of the fourth winding zone W4 on the side of the second end 8. In the switching zone S, there is no need to provide a relatively wide transition zone such as the transition zone 89 shown in FIG. 15. This makes it possible to efficiently utilize the limited dimension of the winding core 5 in the axial direction 6.

[0075] Referring again primarily to FIG. 2, the second winding region Z2 is (2-1) a fifth winding portion W5 (turns T15 to T28) in which the second wire 4 is wound in the first layer from the first end 7 toward the second end 8; (2-2) a sixth winding portion W6 (turns T15 to T22) in which the first wire 3 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the fifth winding portion W5 extends; (2-3) a third transposition portion R3 (turn T22 → T23) in which the first wire 3 is redirected from the end of the sixth winding portion W6 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (2-4) A seventh winding portion W7 (turns T23 to T24) in which the first wire 3 is connected to the third transposition portion R3 and wound M turns (here, 2 turns) in the third layer; (2-5) a fourth transposition portion R4 (turns T24 to T25) where the first wire 3 is guided from the seventh winding portion W7 to the position of the second layer; (2-6) an eighth winding portion W8 (turns T25 to T28) in which the first wire 3 is connected to the fourth transposition portion R4 and wound toward the second end 8 in the second layer; It has.

[0076] According to the above configuration, in the first winding region Z1, the second wire 4 located in the second layer where there is a concern of inadvertent step-down is formed with a first transposition portion R1 that is redirected from the end of the second winding portion W2 on the second end 8 side toward the first end 7 and led to a position in the third layer, and a third winding portion W3 that is connected to the first transposition portion R1 and wound in the third layer, thereby making it less likely that the second wire 4 located in the second layer will become misaligned.

[0077] Furthermore, in the second winding region Z2, the first wire 3 located in the second layer, where there is a risk of inadvertent step-down, forms a third transposition portion R3 in which the end of the sixth winding portion W6 on the second end 8 side is redirected toward the first end 7 side and led to a position in the third layer, and a seventh winding portion W7 connected to the third transposition portion R3 and wound in the third layer, thereby making it less likely that the first wire 3 located in the second layer will become misaligned.

[0078] Furthermore, in the first winding region Z1, on either the first end 7 side or the second end 8 side of the boundary between the second winding portion W2 and the fourth winding portion W4 (the boundary between the turn T8 and the turn T11 of the wire located in the second layer; hereinafter referred to as "turn T8 / T11"), in this embodiment, on the first end 7 side, there is a +0.5 turn shift region F1, which is shifted 0.5 turns in the positive direction between the first wire 3 and the second wire 4.

[0079] On the other hand, in the first winding region Z1, on the other of the first end 7 side and the second end 8 side of the boundary (turns T8 / T11) between the second winding portion W2 and the fourth winding portion W4, in this embodiment, on the second end 8 side, there is a -(N-0.5) turn shift region, specifically a -1.5 turn shift region F2, in which the first wire 3 and the second wire 4 are shifted in the negative direction by (N-0.5) turns.

[0080] Similarly, in the second winding region Z2, on either the first end 7 side or the second end 8 side of the boundary (turns T22 / T25) between the sixth winding portion W6 and the eighth winding portion W8, in this embodiment, on the first end 7 side, there is a -0.5 turn shift region F3, which is shifted 0.5 turns in the negative direction between the first wire 3 and the second wire 4.

[0081] On the other hand, on the other of the first end 7 side and the second end 8 side of the boundary (turns T22 / T25) between the sixth winding portion W6 and the eighth winding portion W8, in this embodiment, on the second end 8 side, there is a +(M-0.5) turn deviation region, specifically a +1.5 turn deviation region F4, in which the first wire 3 and the second wire 4 are shifted in the positive direction by (M-0.5) turns.

[0082] As described above, the number of turns (8 turns) in the +0.5 turn shift region F1 is the same as the number of turns (8 turns) in the -0.5 turn shift region F3, and the number of turns (4 turns) in the -1.5 turn shift region F2 is the same as the number of turns (4 turns) in the +1.5 turn shift region F4, so the capacity is balanced between the first winding region Z1 and the second winding region Z2.

[0083] Furthermore, in this embodiment, in the first winding region Z1, the ratio of (the number of turns in the second winding portion W2 that provides the +0.5 turn shift region F1):(the number of turns in the fourth winding portion W4 that provides the -1.5 turn shift region F2) is within the range of 2 to 5:1, so the capacity is balanced even within the range of the first winding region Z1.

[0084] Similarly, in the second winding region Z2, the ratio of (the number of turns in the sixth winding portion W6 that provides the -0.5 turn shift region F3):(the number of turns in the eighth winding portion W8 that provides the +1.5 turn shift region F4) is within the range of 2 to 5:1, so the capacity is balanced even within the range of the second winding region Z2.

[0085] As a result, the influence of stray capacitance occurring between the first wire 3 and the second wire 4 can be reduced, and in the case of a common mode choke coil, for example, the mode conversion characteristics can be reduced.

[0086] Furthermore, in this embodiment, the number of turns (14 turns) of the first winding portion W1 of the first wire 3 in the first winding zone Z1 is equal to the number of turns (14 turns) of the fifth winding portion W5 of the second wire 4 in the second winding zone Z2. Moreover, the wire located in the first layer and the wire located in the second layer are switched between the first winding zone Z1 and the second winding zone Z2, so it is possible to eliminate or reduce the difference in length between the first wire 3 and the second wire 4. This can also contribute to reducing the mode conversion characteristics in, for example, a common mode choke coil.

[0087] Furthermore, in the third winding portion W3 of the first winding region Z1, the second wire 4 is wound to form a third layer, and in the seventh winding portion W7 of the second winding region Z2, the first wire 3 is wound to form a third layer, thereby saving space for wire winding on the circumferential surface of the winding core portion 5.

[0088] In this embodiment, as clearly shown in Fig. 3, the portions where the first wire 3 and the second wire 4 intersect, such as the transposition portions R1 to R4 and the interchange portion S, are located on a surface other than the bottom surface 29 and the top surface 30 of the winding core portion 5, specifically, along the first side surface 31. Arranging the portions where the first wire 3 and the second wire 4 intersect in this manner provides the following advantages.

[0089] At the intersection of the first wire 3 and the second wire 4, at least two wires 3 and 4 are aligned in a direction perpendicular to the circumferential surface of the winding core 5, and bulge out relatively significantly from the circumferential surface of the winding core 5. If such a bulging portion were positioned along the bottom surface 29 of the winding core 5, the wires 3 and 4 could come into contact with or be very close to the mounting board, which could result in electrical problems. Furthermore, if the bulging portion were positioned along the top surface 30 of the winding core 5, the wires 3 and 4 could come into contact with or be crushed by the top plate 27.

[0090] In contrast to these, if the portion where the degree of bulging becomes greater is located on a surface other than the bottom surface 29 and top surface 30 of the winding core 5, specifically along the first side surface 31 or the second side surface 32, the above-mentioned inconvenience can be avoided. Note that the reason why the surface on which the portion where the degree of bulging becomes greater is located is a surface other than the bottom surface 29 and top surface 30 of the winding core 5 is that the cross section of the winding core may be polygonal other than rectangular, for example, hexagonal, or may be circular or elliptical, and in such cases it may be difficult to identify the "side surface."

[0091] <Other embodiments> Second to twelfth embodiments of the present invention will be described below with reference to Figures 4 to 14. In Figures 4 to 14, elements corresponding to those shown in Figure 2 are given the same reference numerals. Note that the second to twelfth embodiments also achieve the same effects as the first embodiment described above.

[0092] [Second embodiment] In the second embodiment shown in FIG. 4, three winding zones, namely, a first winding zone Z1, a second winding zone Z2, and a third winding zone Z3, are arranged in this order along the axial direction 6 of the winding core 5.

[0093] The first volume rotation area Z1 is (1-1) A first winding portion W1 (turns T1 to T8) in which the first wire 3 is wound in a first layer from the first end 7 toward the second end 8; (1-2) a second winding portion W2 (turns T1 to T4) in which the second wire 4 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the first winding portion W1 extends; (1-3) a first transposition portion R1 (turn T4 → T5) in which the second wire 4 is redirected from the end of the second winding portion W2 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (1-4) A third winding portion W3 (turns T5 to T6) in which the second wire 4 is connected to the first transposition portion R1 and wound N turns (here, 2 turns) in the third layer; (1-5) a second transposition portion R2 (turn T6 → T7) where the second wire 4 is guided from the third winding portion W3 to the position of the second layer; (1-6) a fourth winding portion W4 (turns T7 to T8) in which the second wire 4 is connected to the second transposition portion R2 and wound toward the second end 8 in the second layer; It has.

[0094] Next, the second winding zone Z2 is arranged following the first winding zone Z1. Between the first winding zone Z1 and the second winding zone Z2, the first wire 3 and the second wire 4 switch layers. At this switching point, the first wire 3 is led from the end of the first winding portion W1 on the second end 8 side to the second layer, and the second wire 4 is led from the end of the fourth winding portion W4 on the second end 8 side to the first layer.

[0095] The second volume region Z2 is (2-1) a fifth winding portion W5 (turns T9 to T19) in which the second wire 4 is wound in the first layer from the first end 7 toward the second end 8; (2-2) a sixth winding portion W6 (turns T9 to T14) in which the first wire 3 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the fifth winding portion W5 extends; (2-3) a third transposition portion R3 (turn T14 → T15) in which the first wire 3 is redirected from the end of the sixth winding portion W6 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (2-4) A seventh winding portion W7 (turns T15 to T16) in which the first wire 3 is connected to the third transposition portion R3 and wound M turns (here, 2 turns) in the third layer; (2-5) a fourth transposition portion R4 (turn T16 → T17) where the first wire 3 is guided from the seventh winding portion W7 to the position of the second layer; (2-6) an eighth winding portion W8 (turns T17 to T19) in which the first wire 3 is connected to the fourth transposition portion R4 and wound toward the second end 8 in the second layer; It has.

[0096] Next, the third winding zone Z3 is arranged following the second winding zone Z2. Between the second winding zone Z2 and the third winding zone Z3, the layers in which the first wire 3 and the second wire 4 are located are swapped. At this swapping point, the first wire 3 is led into the first layer from the end of the eighth winding zone W8 on the second end 8 side, and the second wire 3 is led into the second layer from the end of the fifth winding zone W5 on the second end 8 side.

[0097] The third winding region Z3 has a configuration substantially similar to that of the first winding region Z1, (3-1) a ninth winding portion W9 (turns T20 to T27) in which the first wire 3 is wound in the first layer from the first end 7 toward the second end 8; (3-2) a tenth winding portion W10 (turns T20 to T23) in which the second wire 4 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the ninth winding portion W9 extends; (3-3) A fifth transposition portion R5 (turn T23 → T24) in which the second wire 4 is redirected from the end of the tenth winding portion W10 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (3-4) An eleventh winding portion W11 (turns T24 to T25) in which the second wire 4 is connected to the fifth transposition portion R5 and wound P turns (P is a natural number, here 2 turns) in the third layer; (3-5) a sixth transposition portion R6 (turn T25 → T26) where the second wire 4 is guided from the end of the eleventh winding portion W11 on the second end 8 side to the position of the second layer; (3-6) a twelfth winding portion W12 (turns T26 to T27) in which the second wire 4 is connected to the sixth transposition portion R6 and wound toward the second end portion 8 in the second layer; It has.

[0098] The second embodiment also makes it possible to make it difficult for the wires located on the second layer to become misaligned.

[0099] In addition, in the first winding region Z1, on the first end 7 side of the boundary (turn T4 / T7) between the second winding portion W2 and the fourth winding portion W4, there is a +0.5 turn shift region F1, which is shifted 0.5 turns in the positive direction between the first wire 3 and the second wire 4.

[0100] On the other hand, in the first winding region Z1, on the second end 8 side of the boundary (turn T4 / T7) between the second winding portion W2 and the fourth winding portion W4, there is a -(N-0.5) turn shift region, specifically a -1.5 turn shift region F2, in which the first wire 3 and the second wire 4 are shifted in the negative direction by (N-0.5) turns.

[0101] Similarly, in the second winding region Z2, on the first end 7 side of the boundary (turns T14 / T17) between the sixth winding portion W6 and the eighth winding portion W8, there is a -0.5 turn shift region F3, which is shifted 0.5 turns in the negative direction between the first wire 3 and the second wire 4.

[0102] On the other hand, in the second winding region Z2, on the second end 8 side of the boundary (turns T14 / T17) between the sixth winding portion W6 and the eighth winding portion W8, there is a +(M-0.5) turn shift region, specifically a +1.5 turn shift region F4, in which the first wire 3 and the second wire 4 are shifted in the positive direction by (M-0.5) turns.

[0103] Similarly, in the third winding region Z3, on the first end 7 side of the boundary (turns T23 / T26) between the 10th winding portion W10 and the 12th winding portion W12, there is a +0.5 turn shift region F1, which is shifted 0.5 turns in the positive direction between the first wire 3 and the second wire 4.

[0104] On the other hand, in the third winding region Z3, on the second end 8 side of the boundary (turns T23 / T26) between the ninth winding portion W9 and the twelfth winding portion W12, there is a -(P-0.5) turn shift region, specifically a -1.5 turn shift region F2, in which the first wire 3 and the second wire 4 are shifted in the negative direction by (P-0.5) turns.

[0105] In the first to third winding regions Z1 to Z3 described above, (Number of turns in W2): (Number of turns in W4) =(Number of turns in W6):(Number of turns in W8) =(Number of turns in W10):(Number of turns in W12) =2:1 (N:1, M:1, P:1) Therefore, the stray capacitances are balanced within each of the first to third winding regions Z1 to Z3.

[0106] Furthermore, the total number of turns in the +0.5 turn shift region F1 does not match the total number of turns in the -0.5 turn shift region F3, and the total number of turns in the -1.5 turn shift region F2 does not match the total number of turns in the +1.5 turn shift region F4. However, as mentioned above, the ratio of the number of turns is 2:1, so the stray capacitance is balanced overall.

[0107] The ratio of the number of turns is not limited to 2:1, and as long as it is in the range of 2 to 5:1, the stray capacitance can be balanced overall.

[0108] As a result, the influence of stray capacitance occurring between the first wire 3 and the second wire 4 can be reduced, and in the case of a common mode choke coil, for example, the mode conversion characteristics can be reduced.

[0109] Furthermore, the first wire 3 is the first layer in the first winding zone Z1 and the third winding zone Z3, and the second wire 4 is the first layer in the second winding zone Z2. In this way, the layers in which the first wire 3 and the second wire 4 are located are swapped between the first winding zone Z1 and the third winding zone Z3 and the second winding zone Z2, which reduces the difference in length between the first wire 3 and the second wire 4. This can also contribute to reducing the mode conversion characteristics in, for example, a common mode choke coil.

[0110] In the second embodiment, strictly speaking, {(number of turns at W1) + (number of turns at W9)} is not equal to (number of turns at W5). Therefore, the difference between the length of the first wire 3 and the length of the second wire 4 is slightly larger than in the first embodiment. However, even in the second embodiment, the effect of reducing the mode conversion characteristics of the common mode choke coil can be sufficiently achieved.

[0111] The arrangement of the winding regions along the winding core 5 may be further repeated.

[0112] [Third embodiment] In the third embodiment shown in FIG. 5, three winding zones, namely, a first winding zone Z1, a second winding zone Z2, and a third winding zone Z3, are arranged in this order along the axial direction 6 of the winding core 5.

[0113] The first volume rotation area Z1 is (1-1) A first winding portion W1 (turns T1 to T8) in which the first wire 3 is wound in a first layer from the first end 7 toward the second end 8; (1-1a) an intentional step-down portion d (turn T1) where the second wire 4 to be positioned in the second layer is intentionally wound in the first layer adjacent to the end portion on the first end 7 side of the first winding portion W1; (1-2) a second winding portion W2 (turns T2 to T6) in which the second wire 4 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the first winding portion W1 extends; (1-3) a first transposition portion R1 (turn T6 → T7) in which the second wire 4 is redirected from the end of the second winding portion W2 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (1-4) A third winding portion W3 (turns T7 to T8) in which the second wire 4 is connected to the first transposition portion R1 and wound N turns (here, 2 turns) in the third layer; (1-5) a second transposition portion R2 (turn T8 → T9) in which the second wire 4 is guided from the end of the third winding portion W3 on the second end 8 side to a position of the first layer on the second end 8 side of the end of the first winding portion W1 on the second end 8 side; (1-6) a fourth winding portion W4 (turns T9 to T10) in which the second wire 4 is connected to the second transposition portion R2 and wound toward the second end 8 in the first layer; (1-7) a third transposition portion R3 (turn T8 → T9) in which the first wire 3 is redirected from the end of the first winding portion W1 on the second end 8 side toward the first end 7 side and guided to the position of the second layer on the first winding portion W1; (1-8) A fifth winding portion W5 (turns T9 to T10) in which the first wire 3 is connected to the third transposition portion R3 and wound onto the fourth winding portion W4 toward the second end portion 8 in the second layer; It has.

[0114] Next, the second winding zone Z2 is arranged following the first winding zone Z1. Between the first winding zone Z1 and the second winding zone Z2, the first wire 3 and the second wire 4 are switched in the layers in which they are located.

[0115] The second volume region Z2 is (2-1) a sixth winding portion W6 (turns T11 to T17) in which the second wire 4 is wound in the first layer from the first end 7 toward the second end 8; (2-2) a seventh winding portion W7 (turns T11 to T15) in which the first wire 3 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the sixth winding portion W6 extends; (2-3) a fourth transposition portion R4 (turn T15 → T16) in which the first wire 3 is redirected from the end of the seventh winding portion W7 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (2-4) An eighth winding portion W8 (turns T16 to T17) in which the first wire 3 is connected to the fourth transposition portion R4 and wound M turns (here, 2 turns) in the third layer; (2-5) A fifth transposition portion R5 (turn T17 → T18) in which the first wire 3 is guided from the end of the eighth winding portion W8 on the second end 8 side to a position of the first layer closer to the second end 8 side than the end of the sixth winding portion W6 on the second end 8 side; (2-6) a ninth winding portion W9 (turns T18 to T19) in which the first wire 3 is connected to the fifth transposition portion R5 and wound toward the second end portion 8 in the first layer; (2-7) A sixth transposition portion R6 (turn T17→T18) in which the second wire 4 is redirected from the end of the sixth winding portion W6 on the second end 8 side to the first end 7 side and led to the position of the second layer on the sixth winding portion W6; (2-8) A tenth winding portion W10 (turns T18 to T19) in which the second wire 4 is connected to the sixth transposition portion R6 and wound onto the ninth winding portion W9 toward the second end portion 8 in the second layer; It has.

[0116] Next, the third winding zone Z3 is arranged following the second winding zone Z2. Between the second winding zone Z2 and the third winding zone Z3, the first wire 3 and the second wire 4 are switched in their respective layers.

[0117] Volume 3 region Z3 is (3-1) an eleventh winding portion W11 (turns T20 to T26) in which the first wire 3 is wound in the first layer from the first end 7 toward the second end 8; (3-2) a twelfth winding portion W12 (turns T20 to T24) in which the second wire 4 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the ninth winding portion W9 extends; (3-3) A seventh transposition portion R7 (turn T24 → T25) where the second wire 4 is redirected from the end of the twelfth winding portion W12 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (3-4) A thirteenth winding portion W13 (turns T25 to T26) in which the second wire 4 is connected to the seventh transposition portion R7 and wound P turns (here, two turns) in the third layer; (3-5) an eighth transposition portion R8 (turn T26 → T27) in which the second wire 4 is guided from the end of the thirteenth winding portion W13 on the second end 8 side to a position of the first layer closer to the second end 8 side than the end of the eleventh winding portion W11 on the second end 8 side; (3-6) a fourteenth winding portion W14 (turns T27 to T28) in which the second wire 4 is connected to the eighth transposition portion R8 and wound toward the second end portion 8 in the first layer; (3-7) a ninth transposition portion R9 (turn T26 → T27) in which the first wire 3 is redirected from the end of the eleventh winding portion W11 on the second end 8 side toward the first end 7 side and guided to the position of the second layer on the eleventh winding portion W11; (3-8) a 15th winding portion W15 (turns T27 to T28) in which the first wire 3 is connected to the 9th transposition portion R9 and wound onto the 14th winding portion W14 toward the second end portion 8 in the second layer; It has.

[0118] The third embodiment also makes it possible to make it difficult for the wires located on the second layer to become misaligned.

[0119] In particular, according to the third embodiment, an intentional step-down portion d is provided at the beginning of the winding of the second wire 4 in the first winding region Z1, which contributes to stabilizing the winding state of the second wire 4 and makes it less likely for the second wire 4 to shift out of position.

[0120] On the first end 7 side of the boundary (turns T6 / T9) between the second winding portion W2 of the second wire 4 and the fifth winding portion W5 of the first wire 3, there is a -0.5 turn shift region F3, which is shifted 0.5 turns in the negative direction between the first wire 3 and the second wire 4.

[0121] On the other hand, on the second end 8 side of the boundary (turns T6 / T9) between the second winding portion W2 of the second wire 4 and the fifth winding portion W5 of the first wire 3, there is a +(N-0.5) turn misalignment region, specifically a +1.5 turn misalignment region F4, in which the first wire 3 and the second wire 4 are shifted by (N-0.5) turns in the positive direction.

[0122] In addition, on the first end 7 side of the boundary (turns T15 / T18) between the 7th winding portion W7 of the first wire 3 and the 10th winding portion W10 of the second wire 4, there is a +0.5 turn shift region F1, which is shifted 0.5 turns in the positive direction between the first wire 3 and the second wire 4.

[0123] On the other hand, on the second end 8 side of the boundary (turns T15 / T18) between the 7th winding portion W7 of the first wire 3 and the 10th winding portion W10 of the second wire 4, there is a -(M-0.5) turn misalignment region, specifically a -1.5 turn misalignment region F2, in which the first wire 3 and the second wire 4 are misaligned by (M-0.5) turns in the negative direction.

[0124] In addition, on the first end 7 side of the boundary (turns T24 / T27) between the 12th winding portion W12 of the second wire 4 and the 15th winding portion W15 of the first wire 3, there is a -0.5 turn shift region F3, which is shifted 0.5 turns in the negative direction between the first wire 3 and the second wire 4.

[0125] On the other hand, on the second end 8 side of the boundary (turns T24 / T27) between the 12th winding portion W12 of the second wire 4 and the 15th winding portion W15 of the first wire 3, there is a +(P-0.5) turn misalignment region, specifically a +1.5 turn misalignment region F4, in which the first wire 3 and the second wire 4 are misaligned in the positive direction by (P-0.5) turns.

[0126] As a result, the influence of stray capacitance occurring between the first wire 3 and the second wire 4 can be reduced, and in the case of a common mode choke coil, for example, the mode conversion characteristics can be reduced.

[0127] In this embodiment, (Number of turns in W2): (Number of turns in W5) =(Number of turns in W7):(Number of turns in W10) =(Number of turns in W12):(Number of turns in W15) =5:2 Since N:1 (M:1, P:1) is within the range of 2 to 5:1, the stray capacitances are well balanced.

[0128] Furthermore, the total number of turns in the -0.5 turn shift region F3 does not match the total number of turns in the +0.5 turn shift region F1, being 10:5, and the total number of turns in the +1.5 turn shift region F4 does not match the total number of turns in the -1.5 turn shift region F2, being 4:2, but both are within the range of 2 to 5:1, so the stray capacitances are balanced.

[0129] Therefore, according to this embodiment as well, the stray capacitance is well balanced, and therefore the effect of reducing the mode conversion characteristics can be expected in the common mode choke coil.

[0130] Also in this embodiment, the layers in which the first wire 3 and the second wire 4 are located are switched between the first winding zone Z1 and the third winding zone Z3 and the second winding zone Z2, thereby reducing the difference in length between the first wire 3 and the second wire 4. This can also contribute to reducing the mode conversion characteristics in the common mode choke coil.

[0131] The arrangement of the winding regions along the winding core 5 may be further repeated.

[0132] [Fourth embodiment] In the fourth embodiment shown in FIG. 6, two winding zones, namely, a first winding zone Z1 and a second winding zone Z2, are arranged in sequence along the axial direction 6 of the winding core portion 5, and differ from the configuration of the first embodiment in that the wire constituting the third layer is one turn (N=1, M=1).

[0133] The first volume rotation area Z1 is (1-1) A first winding portion W1 (turns T1 to T13) in which the first wire 3 is wound in a first layer from the first end 7 toward the second end 8; (1-2) a second winding portion W2 (turns T1 to T6) in which the second wire 4 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the first winding portion W1 extends; (1-3) a first transposition portion R1 (turn T6 → T7) in which the second wire 4 is redirected from the end of the second winding portion W2 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (1-4) A third winding portion W3 (turn T7) in which the second wire 4 is connected to the first transposition portion R1 and wound N turns (here, 1 turn) in the third layer; (1-5) a second transposition portion R2 (turn T7 → T8) where the second wire 4 is guided from the third winding portion W3 to the position of the second layer; (1-6) a fourth winding portion W4 (turns T8 to T13) in which the second wire 4 is connected to the second transposition portion R2 and wound toward the second end 8 in the second layer; It has.

[0134] Next, the second winding zone Z2 is arranged following the first winding zone Z1. Between the first winding zone Z1 and the second winding zone Z2, the layers in which the first wire 3 and the second wire 4 are located are swapped. At this swapping point, the first wire 3 is led from the end of the first winding portion W1 on the second end 8 side to the second layer, and the second wire 3 is led from the end of the fourth winding portion W4 on the second end 8 side to the first layer.

[0135] The second volume region Z2 is (2-1) a fifth winding portion W5 (turns T14 to T26) in which the second wire 4 is wound in the first layer from the first end 7 toward the second end 8; (2-1) A sixth winding portion W6 (turns T14 to T19) in which the first wire 3 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the fifth winding portion W5 extends; (2-3) a third transposition portion R3 (turn T19→T20) in which the first wire 3 is redirected from the end of the sixth winding portion W6 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (2-4) A seventh winding portion W7 (turn T20) in which the first wire 3 is connected to the third transposition portion R3 and wound M turns (here, 1 turn) in the third layer; (2-5) a fourth transposition portion R4 (turn T20 → T21) where the first wire 3 is guided from the seventh winding portion W7 to the position of the second layer; (2-6) an eighth winding portion W8 (turns T21 to T26) in which the first wire 3 is connected to the fourth transposition portion R4 and wound toward the second end 8 in the second layer; It has.

[0136] According to the fourth embodiment, it is also possible to make it difficult for the wires located on the second layer to become misaligned.

[0137] In addition, in the first winding region Z1, on the first end 7 side of the boundary (turns T6 / T8) between the second winding portion W2 and the fourth winding portion W4, there is a +0.5 turn shift region F1, which is shifted 0.5 turns in the positive direction between the first wire 3 and the second wire 4.

[0138] On the other hand, in the first winding region Z1, on the second end 8 side of the boundary (turns T6 / T8) between the second winding portion W2 and the fourth winding portion W4, there is a -(N-0.5) turn shift region, specifically a -0.5 turn shift region F3, in which the first wire 3 and the second wire 4 are shifted in the negative direction by (N-0.5) turns.

[0139] In addition, in the second winding region Z2, on the first end 7 side of the boundary (turns T19 / T21) between the sixth winding portion W6 and the eighth winding portion W8, there is a -0.5 turn shift region F3, which is shifted 0.5 turns in the negative direction between the first wire 3 and the second wire 4.

[0140] On the other hand, on the second end 8 side of the boundary (turns T19 / T21) between the sixth winding portion W6 and the eighth winding portion W8, there is a +(M-0.5) turn misalignment region, specifically a +0.5 turn misalignment region F1, in which the first wire 3 and the second wire 4 are misaligned in the positive direction by (M-0.5) turns.

[0141] As a result, the influence of stray capacitance occurring between the first wire 3 and the second wire 4 can be reduced, and in the case of a common mode choke coil, for example, the mode conversion characteristics can be reduced.

[0142] In this embodiment, (number of turns at W2):(number of turns at W4)=(number of turns at W6):(number of turns at W8)=1:1 (N:1, M:1), so the stray capacitance is balanced even within each of the first winding region Z1 and the second winding region Z2.

[0143] Furthermore, the layers in which the first wire 3 and the second wire 4 are located are swapped between the first winding zone Z1 and the second winding zone Z2, and furthermore, the ratio of (number of turns in W1):(number of turns in W5) is 1:1, so it is possible to eliminate or reduce the difference in length between the first wire 3 and the second wire 4. These factors can also contribute to reducing the mode conversion characteristics in, for example, a common mode choke coil.

[0144] [Fifth embodiment] In the fifth embodiment shown in FIG. 7, three winding zones, namely, a first winding zone Z1, a second winding zone Z2, and a third winding zone Z3, are arranged in order along the axial direction 6 of the winding core 5, and the wire constituting the third layer is one turn (N=1, M=1, P=1).

[0145] The first volume rotation area Z1 is (1-1) A first winding portion W1 (turns T1 to T8) in which the first wire 3 is wound in a first layer from the first end 7 toward the second end 8; (1-1a) an intentional step-down portion d (turn T1) where the second wire 4 to be positioned in the second layer is intentionally wound in the first layer adjacent to the end portion on the first end 7 side of the first winding portion W1; (1-2) a second winding portion W2 (turns T2 to T5) in which the second wire 4 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the first winding portion W1 extends; (1-3) a first transposition portion R1 (turn T5 → T6) in which the second wire 4 is redirected from the end of the second winding portion W2 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (1-4) A third winding portion W3 (turn T6) in which the second wire 4 is connected to the first transposition portion R1 and wound N turns (here, 1 turn) in the third layer; (1-5) a second transposition portion R2 (turn T6 → T7) where the second wire 4 is guided from the third winding portion W3 to the position of the second layer; (1-6) a fourth winding portion W4 (turns T7 to T8) in which the second wire 4 is connected to the second transposition portion R2 and wound toward the second end 8 in the second layer; It has.

[0146] Next, the second winding zone Z2 is arranged following the first winding zone Z1. Between the first winding zone Z1 and the second winding zone Z2, the layers in which the first wire 3 and the second wire 4 are located are swapped. At this swapping point, the first wire 3 is led from the end of the first winding portion W1 on the second end 8 side to the second layer, and the second wire 4 is led from the end of the fourth winding portion W4 on the second end 8 side to the first layer.

[0147] The second volume region Z2 is (2-1) a fifth winding portion W5 (turns T9 to T21) in which the second wire 4 is wound in the first layer from the first end 7 toward the second end 8; (2-2) a sixth winding portion W6 (turns T9 to T16) in which the first wire 3 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the fifth winding portion W5 extends; (2-3) a third transposition portion R3 (turn T16 → T17) in which the first wire 3 is redirected from the end of the sixth winding portion W6 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (2-4) A seventh winding portion W7 (turn T17) in which the first wire 3 is connected to the third transposition portion R3 and wound M turns (here, 1 turn) in the third layer; (2-5) a fourth transposition portion R4 (turn T17 → T18) where the first wire 3 is guided from the seventh winding portion W7 to the position of the second layer; (2-6) an eighth winding portion W8 (turns T18 to T21) in which the first wire 3 is connected to the fourth transposition portion R4 and wound toward the second end 8 in the second layer; It has.

[0148] Next, the third winding zone Z3 is arranged following the second winding zone Z2. Between the second winding zone Z2 and the third winding zone Z3, the layers in which the first wire 3 and the second wire 4 are located are swapped. At this swapping point, the first wire 3 is led into the first layer from the end of the eighth winding zone W8 on the second end 8 side, and the second wire 3 is led into the second layer from the end of the fifth winding zone W5 on the second end 8 side.

[0149] Volume 3 region Z3 is (3-1) a ninth winding portion W9 (turns T22 to T28) in which the first wire 3 is wound in the first layer from the first end 7 toward the second end 8; (3-2) a tenth winding portion W10 (turns T22 to T25) in which the second wire 4 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the ninth winding portion W9 extends; (3-3) A fifth transposition portion R5 (turn T25 → T26) in which the second wire 4 is redirected from the end of the tenth winding portion W10 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (3-4) An eleventh winding portion W11 (turn T26) in which the second wire 4 is connected to the fifth transposition portion R5 and wound P turns (here, 1 turn) in the third layer; (3-5) a sixth transposition portion R6 (turn T26 → T27) where the second wire 4 is guided from the end of the eleventh winding portion W11 on the second end 8 side to the position of the second layer; (3-6) a twelfth winding portion W12 (turns T27 to T28) in which the second wire 4 is connected to the sixth transposition portion R6 and wound toward the second end portion 8 in the second layer; It has.

[0150] According to the fifth embodiment, it is also possible to make it difficult for the wires located on the second layer to become misaligned.

[0151] In particular, according to the fifth embodiment, an intentional step-down portion d is provided at the beginning of the winding of the second wire 4 in the first winding region Z1, which contributes to stabilizing the winding state of the second wire 4 and makes it less likely for the second wire 4 to shift out of position.

[0152] In the first winding region Z1, on the first end 7 side of the boundary (turns T5 / T7) between the second winding portion W2 and the fourth winding portion W4, there is a -0.5 turn shift region F3, which is shifted 0.5 turns in the negative direction between the first wire 3 and the second wire 4.

[0153] On the other hand, in the first winding region Z1, on the second end 8 side of the boundary (turns T5 / T7) between the second winding portion W2 and the fourth winding portion W4, there is a -(N-0.5) turn shift region, specifically a -1.5 turn shift region F2, in which the first wire 3 and the second wire 4 are shifted in the negative direction by (N-0.5) turns.

[0154] In addition, in the second winding region Z2, on the first end 7 side of the boundary (turns T16 / T18) between the sixth winding portion W6 and the eighth winding portion W8, there is a +0.5 turn shift region F1, which is shifted 0.5 turns in the positive direction between the first wire 3 and the second wire 4.

[0155] On the other hand, in the second winding region Z2, on the second end 8 side of the boundary (turns T16 / T18) between the sixth winding portion W6 and the eighth winding portion W8, there is a +(M-0.5) turn shift region, specifically a +1.5 turn shift region F4, in which the first wire 3 and the second wire 4 are shifted in the positive direction by (M-0.5) turns.

[0156] In addition, in the third winding region Z3, on the first end 7 side of the boundary (turns T25 / T27) between the 10th winding portion W10 and the 12th winding portion W12, there is a -0.5 turn shift region F3, which is shifted 0.5 turns in the negative direction between the first wire 3 and the second wire 4.

[0157] On the other hand, in the third winding region Z3, on the second end 8 side of the boundary (turns T25 / T27) between the ninth winding portion W9 and the twelfth winding portion W12, there is a -(P-0.5) turn shift region, specifically a -1.5 turn shift region F2, in which the first wire 3 and the second wire 4 are shifted in the negative direction by (P-0.5) turns.

[0158] As a result, the influence of stray capacitance occurring between the first wire 3 and the second wire 4 can be reduced, and in the case of a common mode choke coil, for example, the mode conversion characteristics can be reduced.

[0159] In this embodiment, the stray capacitances are not balanced within each of the first to third winding regions Z1 to Z3, but are balanced overall as described below.

[0160] That is, the total number of turns in the -0.5 turn deviation region F3 is the sum (8 turns) of the number of turns in W2 (4 turns) and the number of turns in W10 (4 turns). On the other hand, the total number of turns in the +0.5 turn deviation region F1 is the number of turns in W6 (8 turns). Therefore, the total number of turns in the -0.5 turn deviation region F3 and the total number of turns in the +0.5 turn deviation region F1 are equal to each other.

[0161] Additionally, the total number of turns in the -1.5 turn deviation region F2 is the sum (4 turns) of the number of turns in W4 (2 turns) and the number of turns in W12 (2 turns). On the other hand, the total number of turns in the +1.5 turn deviation region F4 is the number of turns in W8 (4 turns). Therefore, the total number of turns in the -1.5 turn deviation region F2 and the total number of turns in the +1.5 turn deviation region F4 are equal to each other.

[0162] As a result, the stray capacitance is well balanced overall.

[0163] Furthermore, when considering the number of turns of wire 3 or 4 located in the first layer, first wire 3 has 8 turns in W1 and 7 turns in W9, for a total of 15 turns, while second wire 4 has 13 turns in W5. The number of turns of first wire 3 and second wire 4 are different from each other, and the lengths of wires 3 and 4 are different. Therefore, strictly speaking, the first wire 3 and second wire 4 are not balanced in terms of their respective lengths. However, compared to when the first wire 3 and second wire 4 are not swapped, the difference in length between the first wire 3 and second wire 4 can be made smaller. Therefore, this embodiment can also fully demonstrate the effect of reducing the mode conversion characteristics of the common mode choke coil.

[0164] The arrangement of the winding regions along the winding core 5 may be further repeated.

[0165] [Sixth embodiment] In the sixth embodiment shown in FIG. 8, similar to the configuration of the fifth embodiment, three winding zones, namely, a first winding zone Z1, a second winding zone Z2, and a third winding zone Z3, are arranged in order along the axial direction 6 of the winding core portion 5, and the wire constituting the third layer is one turn (N=1, M=1, P=1).

[0166] The first volume rotation area Z1 is (1-1) a first winding portion W1 (turns T1 to T7) in which the first wire 3 is wound in a first layer from the first end 7 toward the second end 8; (1-2) a second winding portion W2 (turns T1 to T3) in which the second wire 4 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the first winding portion W1 extends; (1-3) a first transposition portion R1 (turn T3 → T4) in which the second wire 4 is redirected from the end of the second winding portion W2 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (1-4) A third winding portion W3 (turn T4) in which the second wire 4 is connected to the first transposition portion R1 and wound N turns (here, 1 turn) in the third layer; (1-5) a second transposition portion R2 (turn T4 → T5) where the second wire 4 is guided from the third winding portion W3 to the position of the second layer; (1-6) a fourth winding portion W4 (turns T5 to T7) in which the second wire 4 is connected to the second transposition portion R2 and wound toward the second end 8 in the second layer; It has.

[0167] Next, the second winding zone Z2 is arranged following the first winding zone Z1. Between the first winding zone Z1 and the second winding zone Z2, the layers in which the first wire 3 and the second wire 4 are located are swapped. At this swapping point, the first wire 3 is led from the end of the first winding portion W1 on the second end 8 side to the second layer, and the second wire 3 is led from the end of the fourth winding portion W4 on the second end 8 side to the first layer.

[0168] The second volume region Z2 is (2-1) a fifth winding portion W5 (turns T8 to T20) in which the second wire 4 is wound in the first layer from the first end 7 toward the second end 8; (2-2) a sixth winding portion W6 (turns T8 to T13) in which the first wire 3 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the fifth winding portion W5 extends; (2-3) a third transposition portion R3 (turn T13→T14) in which the first wire 3 is redirected from the end of the sixth winding portion W6 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (2-4) A seventh winding portion W7 (turn T14) in which the first wire 3 is connected to the third transposition portion R3 and wound M turns (here, 1 turn) in the third layer; (2-5) a fourth transposition portion R4 (turns T14 to T15) where the first wire 3 is guided from the seventh winding portion W7 to the position of the second layer; (2-6) an eighth winding portion W8 (turns T15 to T20) in which the first wire 3 is connected to the fourth transposition portion R4 and wound toward the second end 8 in the second layer; It has.

[0169] Next, the third winding zone Z3 is arranged following the second winding zone Z2. Between the second winding zone Z2 and the third winding zone Z3, the layers in which the first wire 3 and the second wire 4 are located are swapped. At this swapping point, the first wire 3 is led into the first layer from the end of the eighth winding zone W8 on the second end 8 side, and the second wire 3 is led into the second layer from the end of the fifth winding zone W5 on the second end 8 side.

[0170] Volume 3 region Z3 is (3-1) a ninth winding portion W9 (turns T21 to T27) in which the first wire 3 is wound in the first layer from the first end 7 toward the second end 8; (3-2) a tenth winding portion W10 (turns T21 to T23) in which the second wire 4 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the ninth winding portion W9 extends; (3-3) A fifth transposition portion R5 (turn T23 → T24) in which the second wire 4 is redirected from the end of the tenth winding portion W10 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (3-4) An eleventh winding portion W11 (turn T24) in which the second wire 4 is connected to the fifth transposition portion R5 and wound P turns (here, 1 turn) in the third layer; (3-5) a sixth transposition portion R6 (turn T24 → T25) where the second wire 4 is guided from the end of the eleventh winding portion W11 on the second end 8 side to the position of the second layer; (3-6) a twelfth winding portion W12 (turns T25 to T27) in which the second wire 4 is connected to the sixth transposition portion R6 and wound toward the second end portion 8 in the second layer; It has.

[0171] According to the sixth embodiment, it is also possible to make it difficult for the wires located on the second layer to become misaligned.

[0172] In addition, in the first winding region Z1, on the first end 7 side of the boundary (turns T3 / T5) between the second winding portion W2 and the fourth winding portion W4, there is a +0.5 turn shift region F1, which is shifted 0.5 turns in the positive direction between the first wire 3 and the second wire 4.

[0173] On the other hand, in the first winding region Z1, on the second end 8 side of the boundary (turns T3 / T5) between the second winding portion W2 and the fourth winding portion W4, there is a -(N-0.5) turn shift region, specifically a -0.5 turn shift region F3, in which the first wire 3 and the second wire 4 are shifted in the negative direction by (N-0.5) turns.

[0174] In addition, in the second winding region Z2, on the first end 7 side of the boundary (turns T13 / T15) between the sixth winding portion W6 and the eighth winding portion W8, there is a -0.5 turn shift region F3, which is shifted 0.5 turns in the negative direction between the first wire 3 and the second wire 4.

[0175] On the other hand, in the second winding region Z2, on the second end 8 side of the boundary (turns T13 / T15) between the sixth winding portion W6 and the eighth winding portion W8, there is a +(M-0.5) turn shift region, specifically a +0.5 turn shift region F1, in which the first wire 3 and the second wire 4 are shifted in the positive direction by (M-0.5) turns.

[0176] In addition, in the third winding region Z3, on the first end 7 side of the boundary (turns T23 / T25) between the 10th winding portion W10 and the 12th winding portion W12, there is a +0.5 turn shift region F1, which is shifted 0.5 turns in the positive direction between the first wire 3 and the second wire 4.

[0177] On the other hand, in the third winding region Z3, on the second end 8 side of the boundary (turns T23 / T25) between the ninth winding portion W9 and the twelfth winding portion W12, there is a -(P-0.5) turn shift region, specifically a -0.5 turn shift region F3, in which the first wire 3 and the second wire 4 are shifted in the negative direction by (P-0.5) turns.

[0178] As a result, the influence of stray capacitance occurring between the first wire 3 and the second wire 4 can be reduced, and in the case of a common mode choke coil, for example, the mode conversion characteristics can be reduced.

[0179] Also in this embodiment, the layers in which the first wire 3 and the second wire 4 are located are switched between the first winding zone Z1 and the third winding zone Z3 and the second winding zone Z2, thereby reducing the difference in length between the first wire 3 and the second wire 4. This can also contribute to reducing the mode conversion characteristics in the common mode choke coil.

[0180] The arrangement of the winding regions along the winding core 5 may be further repeated.

[0181] [Seventh embodiment] In the seventh embodiment shown in FIG. 9, two winding zones, namely, a first winding zone Z1 and a second winding zone Z2, are arranged in sequence along the axial direction 6 of the winding core portion 5, and differ from the configuration of the first or fourth embodiment in that the wire constituting the third layer has three turns (N=3, M=3), for example.

[0182] The first volume rotation area Z1 is (1-1) A first winding portion W1 (turns T1 to T13) in which the first wire 3 is wound in a first layer from the first end 7 toward the second end 8; (1-2) a second winding portion W2 (turns T1 to T8) in which the second wire 4 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the first winding portion W1 extends; (1-3) a first transposition portion R1 (turn T8 → T9) in which the second wire 4 is redirected from the end of the second winding portion W2 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (1-4) A third winding portion W3 (turns T9 to T11) in which the second wire 4 is connected to the first transposition portion R1 and wound N turns (here, 3 turns) in the third layer; (1-5) a second transposition portion R2 (turn T11 → T12) where the second wire 4 is guided from the third winding portion W3 to the position of the second layer; (1-6) a fourth winding portion W4 (turns T12 to T13) in which the second wire 4 is connected to the second transposition portion R2 and wound toward the second end 8 in the second layer; It has.

[0183] Next, the second winding zone Z2 is arranged following the first winding zone Z1. Between the first winding zone Z1 and the second winding zone Z2, the layers in which the first wire 3 and the second wire 4 are located are swapped. At this swapping point, the first wire 3 is led from the end of the first winding portion W1 on the second end 8 side to the second layer, and the second wire 3 is led from the end of the fourth winding portion W4 on the second end 8 side to the first layer.

[0184] The second volume region Z2 is (2-1) a fifth winding portion W5 (turns T14 to T26) in which the second wire 4 is wound in the first layer from the first end 7 toward the second end 8; (2-1) A sixth winding portion W6 (turns T14 to T21) in which the first wire 3 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the fifth winding portion W5 extends; (2-3) a third transposition portion R3 (turn T21 → T22) in which the first wire 3 is redirected from the end of the sixth winding portion W6 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (2-4) A seventh winding portion W7 (turns T22 to T24) in which the first wire 3 is connected to the third transposition portion R3 and wound M turns (here, 3 turns) in the third layer; (2-5) a fourth transposition portion R4 (turns T24 to T25) where the first wire 3 is guided from the seventh winding portion W7 to the position of the second layer; (2-6) an eighth winding portion W8 (turns T25 to T26) in which the first wire 3 is connected to the fourth transposition portion R4 and wound toward the second end 8 in the second layer; It has.

[0185] According to the seventh embodiment, it is also possible to make it difficult for the wires located on the second layer to become misaligned.

[0186] In addition, in the first winding region Z1, on the first end 7 side of the boundary (turns T8 / T11) between the second winding portion W2 and the fourth winding portion W4, there is a +0.5 turn shift region F1, which is shifted 0.5 turns in the positive direction between the first wire 3 and the second wire 4.

[0187] On the other hand, in the first winding region Z1, on the second end 8 side of the boundary (turns T8 / T11) between the second winding portion W2 and the fourth winding portion W4, there is a -(N-0.5) turn shift region, specifically a -2.5 turn shift region F5, in which the first wire 3 and the second wire 4 are shifted in the negative direction by (N-0.5) turns.

[0188] In addition, in the second winding region Z2, on the first end 7 side of the boundary (turns T21 / T24) between the sixth winding portion W6 and the eighth winding portion W8, there is a -0.5 turn shift region F3, which is shifted 0.5 turns in the negative direction between the first wire 3 and the second wire 4.

[0189] On the other hand, on the second end 8 side of the boundary (turns T21 / T24) between the sixth winding portion W6 and the eighth winding portion W8, there is a +(M-0.5) turn misalignment region, specifically a +2.5 turn misalignment region F6, in which the first wire 3 and the second wire 4 are misaligned in the positive direction by (M-0.5) turns.

[0190] As a result, the influence of stray capacitance occurring between the first wire 3 and the second wire 4 can be reduced, and in the case of a common mode choke coil, for example, the mode conversion characteristics can be reduced.

[0191] In this embodiment, the number of turns in the +0.5 turn shift region F1 and the number of turns in the -0.5 turn shift region F3 are both 8 turns, which is equal to each other. The number of turns in the -2.5 turn shift region F5 and the number of turns in the +2.5 turn shift region F6 are both 2 turns, which is equal to each other. Therefore, the stray capacitance is balanced overall.

[0192] Meanwhile, looking at the balance of stray capacitance within each of the first winding zone Z1 and the second winding zone Z2, in the first winding zone Z1, the ratio of (number of turns in the +0.5 turn offset zone F1):(number of turns in the -2.5 turn offset zone F5) is 4:1. This ratio is within the range of 2 to 5:1, so the stray capacitance is balanced. Also, in the second winding zone Z2, the ratio of (number of turns in the -0.5 turn offset zone F3):(number of turns in the +2.5 turn offset zone F6) is 4:1. This ratio is also within the range of 2 to 5:1, so the stray capacitance is balanced.

[0193] Also in this embodiment, the layers in which the first wire 3 and the second wire 4 are located are switched between the first winding zone Z1 and the second winding zone Z2, which reduces the difference in length between the first wire 3 and the second wire 4. This can also contribute to reducing the mode conversion characteristics in the common mode choke coil.

[0194] [Eighth embodiment] In the eighth embodiment shown in FIG. 10, two winding zones, a first winding zone Z1 and a second winding zone Z2, are arranged in sequence along the axial direction 6 of the winding core portion 5, and the number of turns of the wire constituting the third layer is different between the first winding zone Z1 and the second winding zone Z2.

[0195] The first volume rotation area Z1 is (1-1) A first winding portion W1 (turns T1 to T13) in which the first wire 3 is wound in a first layer from the first end 7 toward the second end 8; (1-2) a second winding portion W2 (turns T1 to T6) in which the second wire 4 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the first winding portion W1 extends; (1-3) a first transposition portion R1 (turn T6 → T7) in which the second wire 4 is redirected from the end of the second winding portion W2 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (1-4) A third winding portion W3 (turn T7) in which the second wire 4 is connected to the first transposition portion R1 and wound N turns (here, 1 turn) in the third layer; (1-5) a second transposition portion R2 (turn T7 → T8) where the second wire 4 is guided from the third winding portion W3 to the position of the second layer; (1-6) a fourth winding portion W4 (turns T8 to T13) in which the second wire 4 is connected to the second transposition portion R2 and wound toward the second end 8 in the second layer; It has.

[0196] Next, the second winding zone Z2 is arranged following the first winding zone Z1. Between the first winding zone Z1 and the second winding zone Z2, the layers in which the first wire 3 and the second wire 4 are located are swapped. At this swapping point, the first wire 3 is led from the end of the first winding portion W1 on the second end 8 side to the second layer, and the second wire 3 is led from the end of the fourth winding portion W4 on the second end 8 side to the first layer.

[0197] The second volume region Z2 is (2-1) a fifth winding portion W5 (turns T14 to T27) in which the second wire 4 is wound in the first layer from the first end 7 toward the second end 8; (2-1) A sixth winding portion W6 (turns T14 to T21) in which the first wire 3 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the fifth winding portion W5 extends; (2-3) a third transposition portion R3 (turn T21 → T22) in which the first wire 3 is redirected from the end of the sixth winding portion W6 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (2-4) A seventh winding portion W7 (turns T22 to T23) in which the first wire 3 is connected to the third transposition portion R3 and wound M turns (here, 2 turns) in the third layer; (2-5) a fourth transposition portion R4 (turn T23 → T24) where the first wire 3 is guided from the seventh winding portion W7 to the position of the second layer; (2-6) an eighth winding portion W8 (turns T24 to T27) in which the first wire 3 is connected to the fourth transposition portion R4 and wound toward the second end 8 in the second layer; It has.

[0198] According to the eighth embodiment, it is also possible to make it difficult for the wires located on the second layer to become misaligned.

[0199] In addition, in the first winding region Z1, on the first end 7 side of the boundary (turns T6 / T8) between the second winding portion W2 and the fourth winding portion W4, there is a +0.5 turn shift region F1, which is shifted 0.5 turns in the positive direction between the first wire 3 and the second wire 4.

[0200] On the other hand, in the first winding region Z1, on the second end 8 side of the boundary (turns T6 / T8) between the second winding portion W2 and the fourth winding portion W4, there is a -(N-0.5) turn shift region, specifically a -0.5 turn shift region F3, in which the first wire 3 and the second wire 4 are shifted in the negative direction by (N-0.5) turns.

[0201] In addition, in the second winding region Z2, on the first end 7 side of the boundary (turns T21 / T24) between the sixth winding portion W6 and the eighth winding portion W8, there is a -0.5 turn shift region F3, which is shifted 0.5 turns in the negative direction between the first wire 3 and the second wire 4.

[0202] On the other hand, on the second end 8 side of the boundary (turns T21 / T24) between the sixth winding portion W6 and the eighth winding portion W8, there is a +(M-0.5) turn misalignment region, specifically a +1.5 turn misalignment region F4, in which the first wire 3 and the second wire 4 are misaligned in the positive direction by (M-0.5) turns.

[0203] As a result, the influence of stray capacitance occurring between the first wire 3 and the second wire 4 can be reduced, and in the case of a common mode choke coil, for example, the mode conversion characteristics can be reduced.

[0204] Also in this embodiment, the layers in which the first wire 3 and the second wire 4 are located are switched between the first winding zone Z1 and the second winding zone Z2, which reduces the difference in length between the first wire 3 and the second wire 4. This can also contribute to reducing the mode conversion characteristics in the common mode choke coil.

[0205] [Ninth embodiment] In the ninth embodiment shown in FIG. 11, three winding zones, namely, a first winding zone Z1, a second winding zone Z2, and a third winding zone Z3, are arranged in order along the axial direction 6 of the winding core portion 5, and the number of turns of the wire constituting the third layer is different between the first winding zone Z1 and the third winding zone Z3 and the second winding zone Z2.

[0206] The first volume rotation area Z1 is (1-1) A first winding portion W1 (turns T1 to T8) in which the first wire 3 is wound in a first layer from the first end 7 toward the second end 8; (1-2) a second winding portion W2 (turns T1 to T4) in which the second wire 4 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the first winding portion W1 extends; (1-3) a first transposition portion R1 (turn T4 → T5) in which the second wire 4 is redirected from the end of the second winding portion W2 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (1-4) A third winding portion W3 (turns T5 to T6) in which the second wire 4 is connected to the first transposition portion R1 and wound N turns (here, 2 turns) in the third layer; (1-5) a second transposition portion R2 (turn T6 → T7) where the second wire 4 is guided from the third winding portion W3 to the position of the second layer; (1-6) a fourth winding portion W4 (turns T7 to T8) in which the second wire 4 is connected to the second transposition portion R2 and wound toward the second end 8 in the second layer; It has.

[0207] Next, the second winding zone Z2 is arranged following the first winding zone Z1. Between the first winding zone Z1 and the second winding zone Z2, the layers in which the first wire 3 and the second wire 4 are located are swapped. At this swapping point, the first wire 3 is led from the end of the first winding portion W1 on the second end 8 side to the second layer, and the second wire 3 is led from the end of the fourth winding portion W4 on the second end 8 side to the first layer.

[0208] The second volume region Z2 is (2-1) a fifth winding portion W5 (turns T9 to T18) in which the second wire 4 is wound in the first layer from the first end 7 toward the second end 8; (2-2) a sixth winding portion W6 (turns T9 to T13) in which the first wire 3 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the fifth winding portion W5 extends; (2-3) a third transposition portion R3 (turn T13→T14) in which the first wire 3 is redirected from the end of the sixth winding portion W6 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (2-4) A seventh winding portion W7 (turn T14) in which the first wire 3 is connected to the third transposition portion R3 and wound M turns (here, 1 turn) in the third layer; (2-5) a fourth transposition portion R4 (turns T14 to T15) where the first wire 3 is guided from the seventh winding portion W7 to the position of the second layer; (2-6) an eighth winding portion W8 (turns T15 to T18) in which the first wire 3 is connected to the fourth transposition portion R4 and wound toward the second end 8 in the second layer; It has.

[0209] Next, the third winding zone Z3 is arranged following the second winding zone Z2. Between the second winding zone Z2 and the third winding zone Z3, the layers in which the first wire 3 and the second wire 4 are located are swapped. At this swapping point, the first wire 3 is led into the first layer from the end of the eighth winding zone W8 on the second end 8 side, and the second wire 3 is led into the second layer from the end of the fifth winding zone W5 on the second end 8 side.

[0210] The third winding region Z3 has a configuration substantially similar to that of the first winding region Z1, (3-1) a ninth winding portion W9 (turns T19 to T26) in which the first wire 3 is wound in the first layer from the first end 7 toward the second end 8; (3-2) a tenth winding portion W10 (turns T19 to T22) in which the second wire 4 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the ninth winding portion W9 extends; (3-3) A fifth transposition portion R5 (turn T22 → T23) in which the second wire 4 is redirected from the end of the tenth winding portion W10 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (3-4) An eleventh winding portion W11 (turns T23 to T24) in which the second wire 4 is connected to the fifth transposition portion R5 and wound P turns (here, 2 turns) in the third layer; (3-5) a sixth transposition portion R6 (turn T24 → T25) where the second wire 4 is guided from the end of the eleventh winding portion W11 on the second end 8 side to the position of the second layer; (3-6) a twelfth winding portion W12 (turns T25 to T26) in which the second wire 4 is connected to the sixth transposition portion R6 and wound toward the second end portion 8 in the second layer; It has.

[0211] According to the ninth embodiment, it is also possible to make it difficult for the wires located on the second layer to become misaligned.

[0212] In addition, in the first winding region Z1, on the first end 7 side of the boundary (turn T4 / T7) between the second winding portion W2 and the fourth winding portion W4, there is a +0.5 turn shift region F1, which is shifted 0.5 turns in the positive direction between the first wire 3 and the second wire 4.

[0213] On the other hand, in the first winding region Z1, on the second end 8 side of the boundary (turn T4 / T7) between the second winding portion W2 and the fourth winding portion W4, there is a -(N-0.5) turn shift region, specifically a -1.5 turn shift region F2, in which the first wire 3 and the second wire 4 are shifted in the negative direction by (N-0.5) turns.

[0214] In addition, in the second winding region Z2, on the first end 7 side of the boundary (turns T13 / T15) between the sixth winding portion W6 and the eighth winding portion W8, there is a -0.5 turn shift region F3, which is shifted 0.5 turns in the negative direction between the first wire 3 and the second wire 4.

[0215] On the other hand, in the second winding region Z2, on the second end 8 side of the boundary (turns T13 / T15) between the sixth winding portion W6 and the eighth winding portion W8, there is a +(M-0.5) turn shift region, specifically a +0.5 turn shift region F1, in which the first wire 3 and the second wire 4 are shifted in the positive direction by (M-0.5) turns.

[0216] In addition, in the third winding region Z3, on the first end 7 side of the boundary (turns T22 / T25) between the 10th winding portion W10 and the 12th winding portion W12, there is a +0.5 turn shift region F1, which is shifted 0.5 turns in the positive direction between the first wire 3 and the second wire 4.

[0217] On the other hand, in the third winding region Z3, on the second end 8 side of the boundary (turns T22 / T25) between the ninth winding portion W9 and the twelfth winding portion W12, there is a -(P-0.5) turn shift region, specifically a -1.5 turn shift region F2, in which the first wire 3 and the second wire 4 are shifted in the negative direction by (P-0.5) turns.

[0218] As a result, the influence of stray capacitance occurring between the first wire 3 and the second wire 4 can be reduced, and in the case of a common mode choke coil, for example, the mode conversion characteristics can be reduced.

[0219] Also in this embodiment, the layers in which the first wire 3 and the second wire 4 are located are switched between the first winding zone Z1 and the third winding zone Z3 and the second winding zone Z2, thereby reducing the difference in length between the first wire 3 and the second wire 4. This can also contribute to reducing the mode conversion characteristics in the common mode choke coil.

[0220] The arrangement of the winding regions along the winding core 5 may be further repeated.

[0221] [Tenth embodiment] In the tenth embodiment shown in FIG. 12, three winding zones, namely, a first winding zone Z1, a second winding zone Z2, and a third winding zone Z3, are arranged in order along the axial direction 6 of the winding core portion 5, and the number of turns of the wire constituting the third layer is different between the first winding zone Z1, the second winding zone Z2, and the third winding zone Z3.

[0222] The first volume rotation area Z1 is (1-1) a first winding portion W1 (turns T1 to T7) in which the first wire 3 is wound in a first layer from the first end 7 toward the second end 8; (1-2) a second winding portion W2 (turns T1 to T3) in which the second wire 4 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the first winding portion W1 extends; (1-3) a first transposition portion R1 (turn T3 → T4) in which the second wire 4 is redirected from the end of the second winding portion W2 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (1-4) A third winding portion W3 (turn T4) in which the second wire 4 is connected to the first transposition portion R1 and wound N turns (here, 1 turn) in the third layer; (1-5) a second transposition portion R2 (turn T4 → T5) where the second wire 4 is guided from the third winding portion W3 to the position of the second layer; (1-6) a fourth winding portion W4 (turns T5 to T7) in which the second wire 4 is connected to the second transposition portion R2 and wound toward the second end 8 in the second layer; It has.

[0223] Next, the second winding zone Z2 is arranged following the first winding zone Z1. Between the first winding zone Z1 and the second winding zone Z2, the layers in which the first wire 3 and the second wire 4 are located are swapped. At this swapping point, the first wire 3 is led from the end of the first winding portion W1 on the second end 8 side to the second layer, and the second wire 3 is led from the end of the fourth winding portion W4 on the second end 8 side to the first layer.

[0224] The second volume region Z2 is (2-1) a fifth winding portion W5 (turns T8 to T18) in which the second wire 4 is wound in the first layer from the first end 7 toward the second end 8; (2-2) a sixth winding portion W6 (turns T8 to T13) in which the first wire 3 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the fifth winding portion W5 extends; (2-3) a third transposition portion R3 (turn T13→T14) in which the first wire 3 is redirected from the end of the sixth winding portion W6 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (2-4) A seventh winding portion W7 (turns T14 to T16) in which the first wire 3 is connected to the third transposition portion R3 and wound M turns (here, 3 turns) in the third layer; (2-5) a fourth transposition portion R4 (turn T16 → T17) where the first wire 3 is guided from the seventh winding portion W7 to the position of the second layer; (2-6) an eighth winding portion W8 (turns T17 to T18) in which the first wire 3 is connected to the fourth transposition portion R4 and wound toward the second end 8 in the second layer; It has.

[0225] Next, the third winding zone Z3 is arranged following the second winding zone Z2. Between the second winding zone Z2 and the third winding zone Z3, the layers in which the first wire 3 and the second wire 4 are located are swapped. At this swapping point, the first wire 3 is led into the first layer from the end of the eighth winding zone W8 on the second end 8 side, and the second wire 3 is led into the second layer from the end of the fifth winding zone W5 on the second end 8 side.

[0226] Volume 3 region Z3 is (3-1) a ninth winding portion W9 (turns T19 to T26) in which the first wire 3 is wound in the first layer from the first end 7 toward the second end 8; (3-2) a tenth winding portion W10 (turns T19 to T22) in which the second wire 4 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the ninth winding portion W9 extends; (3-3) A fifth transposition portion R5 (turn T22 → T23) in which the second wire 4 is redirected from the end of the tenth winding portion W10 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (3-4) An eleventh winding portion W11 (turns T23 to T24) in which the second wire 4 is connected to the fifth transposition portion R5 and wound P turns (here, 2 turns) in the third layer; (3-5) a sixth transposition portion R6 (turn T24 → T25) where the second wire 4 is guided from the end of the eleventh winding portion W11 on the second end 8 side to the position of the second layer; (3-6) a twelfth winding portion W12 (turns T25 to T26) in which the second wire 4 is connected to the sixth transposition portion R6 and wound toward the second end portion 8 in the second layer; It has.

[0227] According to the tenth embodiment, it is also possible to make it difficult for the wires located on the second layer to become misaligned.

[0228] In addition, in the first winding region Z1, on the first end 7 side of the boundary (turns T3 / T5) between the second winding portion W2 and the fourth winding portion W4, there is a +0.5 turn shift region F1, which is shifted 0.5 turns in the positive direction between the first wire 3 and the second wire 4.

[0229] On the other hand, in the first winding region Z1, on the second end 8 side of the boundary (turns T3 / T5) between the second winding portion W2 and the fourth winding portion W4, there is a -(N-0.5) turn shift region, specifically a -0.5 turn shift region F3, in which the first wire 3 and the second wire 4 are shifted in the negative direction by (N-0.5) turns.

[0230] In addition, in the second winding region Z2, on the first end 7 side of the boundary (turns T13 / T16) between the sixth winding portion W6 and the eighth winding portion W8, there is a -0.5 turn shift region F3, which is shifted 0.5 turns in the negative direction between the first wire 3 and the second wire 4.

[0231] On the other hand, in the second winding region Z2, on the second end 8 side of the boundary (turns T13 / T16) between the sixth winding portion W6 and the eighth winding portion W8, there is a +(M-0.5) turn misalignment region, specifically a +2.5 turn misalignment region F6, in which the first wire 3 and the second wire 4 are misaligned in the positive direction by (M-0.5) turns.

[0232] In addition, in the third winding region Z3, on the first end 7 side of the boundary (turns T22 / T25) between the 10th winding portion W10 and the 12th winding portion W12, there is a +0.5 turn shift region F1, which is shifted 0.5 turns in the positive direction between the first wire 3 and the second wire 4.

[0233] On the other hand, in the third winding region Z3, on the second end 8 side of the boundary (turns T22 / T25) between the ninth winding portion W9 and the twelfth winding portion W12, there is a -(P-0.5) turn shift region, specifically a -1.5 turn shift region F2, in which the first wire 3 and the second wire 4 are shifted in the negative direction by (P-0.5) turns.

[0234] As a result, the influence of stray capacitance occurring between the first wire 3 and the second wire 4 can be reduced, and in the case of a common mode choke coil, for example, the mode conversion characteristics can be reduced.

[0235] Also in this embodiment, the layers in which the first wire 3 and the second wire 4 are located are switched between the first winding zone Z1 and the third winding zone Z3 and the second winding zone Z2, thereby reducing the difference in length between the first wire 3 and the second wire 4. This can also contribute to reducing the mode conversion characteristics in the common mode choke coil.

[0236] The arrangement of the winding regions along the winding core 5 may be further repeated.

[0237] [Eleventh embodiment] In the eleventh embodiment shown in FIG. 13, two winding zones, namely, a first winding zone Z1 and a second winding zone Z2, are arranged in order along the axial direction 6 of the winding core portion 5, and this differs from the configuration of the fourth embodiment, for example, in that the transposition destination of the wire constituting the third layer is the first layer, not the second layer.

[0238] The first volume rotation area Z1 is (1-1) A first winding portion W1 (turns T1 to T10) in which the first wire 3 is wound in a first layer from the first end 7 to the second end 8; (1-1a) an intentional step-down portion d1 (turn T1) where the second wire 4 to be positioned in the second layer is intentionally wound in the first layer adjacent to the end portion on the first end 7 side of the first winding portion W1; (1-2) a second winding portion W2 (turns T2 to T9) in which the second wire 4 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the first winding portion W1 extends; (1-3) a first transposition portion R1 (turn T9 → T10) in which the second wire 4 is redirected from the end of the second winding portion W2 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (1-4) A third winding portion W3 (turn T10) in which the second wire 4 is connected to the first transposition portion R1 and wound N turns (here, 1 turn) in the third layer; (1-5) a second transposition portion R2 (turn T10 → T11) in which the second wire 4 is guided from the end of the third winding portion W3 on the second end 8 side to a position of the first layer on the second end 8 side of the end of the first winding portion W1 on the second end 8 side; (1-6) a fourth winding portion W4 (turns T11 to T14) in which the second wire 4 is connected to the second transposition portion R2 and wound toward the second end 8 in the first layer; (1-7) a third transposition portion R3 (turn T10 → T11) in which the first wire 3 is redirected from the end of the first winding portion W1 on the second end 8 side toward the first end 7 side and guided to the position of the second layer on the first winding portion W1; (1-8) A fifth winding portion W5 (turns T11 to T14) in which the first wire 3 is connected to the third transposition portion R3 and wound onto the fourth winding portion W4 toward the second end portion 8 in the second layer; It has.

[0239] Next, the second winding zone Z2 is arranged following the first winding zone Z1. Between the first winding zone Z1 and the second winding zone Z2, the first wire 3 and the second wire 4 are switched in the layers in which they are located.

[0240] The second volume region Z2 is (2-1) a sixth winding portion W6 (turns T15 to T24) in which the second wire 4 is wound in the first layer from the first end 7 toward the second end 8; (2-1a) an intentional step-down portion d2 (turn T15) where the first wire 3 to be positioned in the second layer is intentionally wound in the first layer adjacent to the end portion on the first end 7 side of the sixth winding portion W6; (2-2) a seventh winding portion W7 (turns T16 to T23) in which the first wire 3 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the sixth winding portion W6 extends; (2-3) a fourth transposition portion R4 (turn T23 → T24) in which the first wire 3 is redirected from the end of the seventh winding portion W7 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (2-4) an eighth winding portion W8 (turn T24) in which the first wire 3 is connected to the fourth transposition portion R4 and wound M turns (here, 1 turn) in the third layer; (2-5) A fifth transposition portion R5 (turn T24 → T25) in which the first wire 3 is guided from the end of the eighth winding portion W8 on the second end 8 side to a position of the first layer closer to the second end 8 side than the end of the sixth winding portion W6 on the second end 8 side; (2-6) a ninth winding portion W9 (turns T25 to T28) in which the first wire 3 is connected to the fifth transposition portion R5 and wound toward the second end 8 in the first layer; (2-7) A sixth transposition portion R6 (turn T24 → T25) in which the second wire 4 is redirected from the end of the sixth winding portion W6 on the second end 8 side to the first end 7 side and guided to the position of the second layer on the sixth winding portion W6; (2-8) A tenth winding portion W10 (turns T25 to T28) in which the second wire 4 is connected to the sixth transposition portion R6 and wound onto the ninth winding portion W9 toward the second end portion 8 in the second layer; It has.

[0241] According to the eleventh embodiment, it is also possible to make it difficult for the positional deviation of the wires located on the second layer to occur.

[0242] In addition, in the first winding region Z1, on the first end 7 side of the boundary (turns T9 / T11) between the second winding portion W2 and the fifth winding portion W5, there is a -0.5 turn shift region F3, which is shifted 0.5 turns in the negative direction between the first wire 3 and the second wire 4.

[0243] On the other hand, in the first winding region Z1, on the second end 8 side of the boundary (turns T9 / T11) between the second winding portion W2 and the fifth winding portion W5, there is a +(N+0.5) turn shift region, specifically a +1.5 turn shift region F4, in which the first wire 3 and the second wire 4 are shifted in the positive direction by (N+0.5) turns.

[0244] In addition, in the second winding region Z2, on the first end 7 side of the boundary (turns T23 / T25) between the seventh winding portion W7 and the tenth winding portion W10, there is a +0.5 turn shift region F1, which is shifted 0.5 turns in the positive direction between the first wire 3 and the second wire 4.

[0245] On the other hand, on the second end 8 side of the boundary (turns T23 / T25) between the 7th winding portion W7 and the 10th winding portion W10, there is a -(M+0.5) turn misalignment region, specifically a -1.5 turn misalignment region F2, in which the first wire 3 and the second wire 4 are misaligned by (M+0.5) turns in the negative direction.

[0246] As a result, the influence of stray capacitance occurring between the first wire 3 and the second wire 4 can be reduced, and in the case of a common mode choke coil, for example, the mode conversion characteristics can be reduced.

[0247] Also in this embodiment, the layers in which the first wire 3 and the second wire 4 are located are switched between the first winding zone Z1 and the second winding zone Z2, which reduces the difference in length between the first wire 3 and the second wire 4. This can also contribute to reducing the mode conversion characteristics in the common mode choke coil.

[0248] [Twelfth embodiment] In the twelfth embodiment shown in FIG. 14, two winding zones, namely, a first winding zone Z1 and a second winding zone Z2, are arranged in order along the axial direction 6 of the winding core portion 5, and similar to the configuration of the eleventh embodiment, the transposition destination of the wire constituting the third layer is the first layer.

[0249] The first winding region Z1 has the same configuration as the first winding region Z1 in the eleventh embodiment. (1-1) A first winding portion W1 (turns T1 to T10) in which the first wire 3 is wound in a first layer from the first end 7 to the second end 8; (1-1a) an intentional step-down portion d1 (turn T1) where the second wire 4 to be positioned in the second layer is intentionally wound in the first layer adjacent to the end portion on the first end 7 side of the first winding portion W1; (1-2) a second winding portion W2 (turns T2 to T9) in which the second wire 4 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the first winding portion W1 extends; (1-3) a first transposition portion R1 (turn T9 → T10) in which the second wire 4 is redirected from the end of the second winding portion W2 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (1-4) A third winding portion W3 (turn T10) in which the second wire 4 is connected to the first transposition portion R1 and wound N turns (here, 1 turn) in the third layer; (1-5) a second transposition portion R2 (turn T10 → T11) in which the second wire 4 is guided from the end of the third winding portion W3 on the second end 8 side to a position of the first layer on the second end 8 side of the end of the first winding portion W1 on the second end 8 side; (1-6) a fourth winding portion W4 (turns T11 to T14) in which the second wire 4 is connected to the second transposition portion R2 and wound toward the second end 8 in the first layer; (1-7) a third transposition portion R3 (turn T10 → T11) in which the first wire 3 is redirected from the end of the first winding portion W1 on the second end 8 side toward the first end 7 side and guided to the position of the second layer on the first winding portion W1; (1-8) A fifth winding portion W5 (turns T11 to T14) in which the first wire 3 is connected to the third transposition portion R3 and wound onto the fourth winding portion W4 toward the second end portion 8 in the second layer; It has.

[0250] In the first winding region Z1 described above, the layer in which the first wire 3 is located alternates between the first winding portion W1 and the fifth winding portion W5, and the layer in which the second wire 4 is located alternates between the second winding portion W2 and the fourth winding portion W4.

[0251] The second winding region Z2 has the same configuration as the first winding region Z1 described above. (2-1) a sixth winding portion W6 (turns T15 to T24) in which the first wire 3 is wound in the first layer from the first end 7 toward the second end 8; (2-1a) an intentional step-down portion d2 (turn T15) where the second wire 4 to be positioned in the second layer is intentionally wound in the first layer adjacent to the end portion on the first end 7 side of the sixth winding portion W6; (2-2) a seventh winding portion W7 (turns T16 to T23) in which the second wire 4 is wound in the second layer from the first end 7 toward the second end 8 to a midpoint of the range in which the sixth winding portion W6 extends; (2-3) a fourth transposition portion R4 (turn T23 → T24) in which the second wire 4 is redirected from the end of the seventh winding portion W7 on the second end 8 side to the first end 7 side and guided to the position of the third layer; (2-4) An eighth winding portion W8 (turn T24) in which the second wire 4 is connected to the fourth transposition portion R4 and wound M turns (here, 1 turn) in the third layer; (2-5) A fifth transposition portion R5 (turn T24 → T25) in which the second wire 4 is guided from the end of the eighth winding portion W8 on the second end 8 side to a position of the first layer closer to the second end 8 side than the end of the sixth winding portion W6 on the second end 8 side; (2-6) a ninth winding portion W9 (turns T25 to T28) in which the second wire 4 is connected to the fifth transposition portion R5 and wound toward the second end portion 8 in the first layer; (2-7) A sixth transposition portion R6 (turn T24 → T25) in which the first wire 3 is redirected from the end of the sixth winding portion W6 on the second end 8 side to the first end 7 side and guided to the position of the second layer on the sixth winding portion W6; (2-8) a tenth winding portion W10 (turns T25 to T28) in which the first wire 3 is connected to the sixth transposition portion R6 and wound onto the ninth winding portion W9 toward the second end portion 8 in the second layer; It has.

[0252] In the second winding region Z2 described above, the layer in which the first wire 3 is located alternates between the sixth winding portion W6 and the tenth winding portion W10, and the layer in which the second wire 4 is located alternates between the seventh winding portion W7 and the ninth winding portion W9.

[0253] According to the twelfth embodiment, it is also possible to make it difficult for the wires located on the second layer to become misaligned.

[0254] In addition, in the first winding region Z1, on the first end 7 side of the boundary (turns T9 / T11) between the second winding portion W2 and the fifth winding portion W5, there is a -0.5 turn shift region F3, which is shifted 0.5 turns in the negative direction between the first wire 3 and the second wire 4.

[0255] On the other hand, in the first winding region Z1, on the second end 8 side of the boundary (turns T9 / T11) between the second winding portion W2 and the fifth winding portion W5, there is a +(N+0.5) turn shift region, specifically a +1.5 turn shift region F4, in which the first wire 3 and the second wire 4 are shifted in the positive direction by (N+0.5) turns.

[0256] In addition, in the second winding region Z2, on the first end 7 side of the boundary (turns T23 / T25) between the seventh winding portion W7 and the tenth winding portion W10, there is a -0.5 turn shift region F3, which is shifted 0.5 turns in the negative direction between the first wire 3 and the second wire 4.

[0257] On the other hand, on the second end 8 side of the boundary (turns T23 / T25) between the 7th winding portion W7 and the 10th winding portion W10, there is a +(M+0.5) turn misalignment region, specifically a +1.5 turn misalignment region F4, in which the first wire 3 and the second wire 4 are misaligned in the positive direction by (M+0.5) turns.

[0258] As a result, the influence of stray capacitance occurring between the first wire 3 and the second wire 4 can be reduced, and in the case of a common mode choke coil, for example, the mode conversion characteristics can be reduced.

[0259] Furthermore, in this embodiment, the layers in which the first wire 3 and the second wire 4 are located are swapped within each of the first winding zone Z1 and the second winding zone Z2, thereby reducing the difference in length between the first wire 3 and the second wire 4. This can also contribute to reducing the mode conversion characteristics in the common mode choke coil.

[0260] In each of the embodiments described above, the number of turns of the wires 3 and 4 is merely an example, and can be increased or decreased as necessary.

[0261] While the present invention has been described above in relation to embodiments relating to coil components that constitute a common mode choke coil, the present invention can also be applied to other applications, such as wire-wound chip transformers. Furthermore, the illustrated embodiments are merely illustrative, and partial substitution or combination of configurations between different embodiments is possible.

[0262] The present invention has the following embodiments.

[0263] <1> a core including a winding core portion having a first end and a second end opposite to each other in an axial direction; a first wire and a second wire wound helically around the winding core with substantially the same number of turns; Equipped with When the layer closest to the peripheral surface of the winding core portion among the multiple layers formed by the first wire and the second wire wound around the winding core portion is expressed as the first layer, the layer wound on the outer periphery of the first layer while fitting into a recess formed between adjacent turns of the wire located in the first layer is expressed as the second layer, and the layer wound on the outer periphery of the second layer while fitting into a recess formed between adjacent turns of the wire located in the second layer is expressed as the third layer, a plurality of winding regions including at least a first winding region and a second winding region, in which the first wire and the second wire have different winding states, are arranged along the axial direction; The first winding region is (1-1) a first winding portion in which the first wire is wound in a first layer from the first end toward the second end; (1-2) a second winding portion in which the second wire is wound in a second layer from the first end toward the second end to a midpoint of the range in which the first winding portion extends; (1-3) a first transposition portion where the second wire is redirected from the end of the second winding portion on the second end side to the first end side and led to a position of a third layer; (1-4) a third winding portion in which the second wire is connected to the first transposition portion and wound N turns (N is a natural number) in a third layer; (1-5) a second transition portion where the second wire is guided from the third winding portion to a position of a second layer; (1-6) a fourth winding portion in which the second wire is connected to the second transposition portion and wound toward the second end portion in a second layer; and Between the first winding region and the second winding region, the first wire and the second wire exchange layers in which they are located; The second winding region is (2-1) a fifth winding portion in which the second wire is wound in a first layer from the first end toward the second end; (2-2) a sixth winding portion in which the first wire is wound in a second layer from the first end toward the second end to a midpoint of the range in which the fifth winding portion extends; (2-3) a third transposition portion where the first wire is redirected from the end of the sixth winding portion on the second end side to the first end side and led to a position of a third layer; (2-4) a seventh winding portion in which the first wire is connected to the third transposition portion and wound M turns (M is a natural number) in a third layer; (2-5) a fourth transition portion where the first wire is guided from the seventh winding portion to a position of the second layer; (2-6) an eighth winding portion in which the first wire is connected to the fourth transposition portion and wound toward the second end portion in a second layer; and With respect to the direction of deviation between the first wire and the second wire, when a turn of the second wire is closer to the second end than the turn of the first wire that is the same as the turn of the second wire, the deviation is considered to be in a positive direction, and when the turn of the second wire is closer to the second end than the turn of the first wire that is the same as the turn of the first wire, the deviation is considered to be in a negative direction. Each of the first winding region and the second winding region has a positive direction deviation region in which the turns between the first wire and the second wire are shifted in a positive direction and a negative direction deviation region in which the turns are shifted in a negative direction. Coil parts.

[0264] <2> the positive direction deviation region is present on either the first end side or the second end side of the boundary between the second winding portion and the fourth winding portion, the negative direction deviation region is present on the other of the first end side and the second end side of the boundary between the second winding portion and the fourth winding portion, the negative direction deviation region is present on either the first end side or the second end side of the boundary between the sixth winding portion and the eighth winding portion, the positive direction deviation region is present on the other of the first end side and the second end side of the boundary between the sixth winding portion and the eighth winding portion; <1> The coil component according to claim 1.

[0265] <3> a +0.5 turn shift region is present on either the first end side or the second end side of the boundary between the second winding portion and the fourth winding portion, where the first wire and the second wire are shifted by 0.5 turns in the positive direction, a −(N−0.5) turn misalignment region exists on the other of the first end side and the second end side of the boundary between the second winding portion and the fourth winding portion, where the first wire and the second wire are misaligned by (N−0.5) turns in a negative direction, a −0.5 turn shift region is present on either the first end side or the second end side of the boundary between the sixth winding portion and the eighth winding portion, where the first wire and the second wire are shifted by 0.5 turns in the negative direction; a +(M-0.5) turn misalignment region, in which the first wire and the second wire are misaligned by (M-0.5) turns in the positive direction, is present on either the first end side or the second end side of the boundary between the sixth winding portion and the eighth winding portion; <2> The coil component according to claim 1.

[0266] <4> the number of turns by which the second wire is wound around the winding core portion in the third winding portion is different from the number of turns by which the first wire is wound around the winding core portion in the eighth winding portion; <1> Or <3> The coil component according to any one of the preceding claims.

[0267] <5> a core including a winding core portion having a first end and a second end opposite to each other in an axial direction; a first wire and a second wire wound helically around the winding core with substantially the same number of turns; Equipped with When the layer closest to the peripheral surface of the winding core portion among the multiple layers formed by the first wire and the second wire wound around the winding core portion is expressed as the first layer, the layer wound on the outer periphery of the first layer while fitting into a recess formed between adjacent turns of the wire located in the first layer is expressed as the second layer, and the layer wound on the outer periphery of the second layer while fitting into a recess formed between adjacent turns of the wire located in the second layer is expressed as the third layer, a plurality of winding regions including at least a first winding region and a second winding region, in which the first wire and the second wire have different winding states, are arranged along the axial direction; The first winding region is (1-1) a first winding portion in which the first wire is wound in a first layer from the first end toward the second end; (1-2) a second winding portion in which the second wire is wound in a second layer from the first end toward the second end to a midpoint of the range in which the first winding portion extends; (1-3) a first transposition portion where the second wire is redirected from the end of the second winding portion on the second end side to the first end side and led to a position of a third layer; (1-4) a third winding portion in which the second wire is connected to the first transposition portion and wound N turns (N is a natural number) in a third layer; (1-5) a second transition portion where the second wire is guided from the third winding portion to a position of the first layer; (1-6) a fourth winding portion in which the second wire is connected to the second transposition portion and wound toward the second end portion in a first layer; (1-7) a third transposition portion where the first wire is redirected from the end of the first winding portion on the second end side to the first end side and led to a position of the second layer; (1-8) a fifth winding portion in which the first wire is connected to the third transposition portion and wound toward the second end portion in a second layer; and Between the first winding region and the second winding region, the first wire and the second wire exchange layers in which they are located; The second winding region is (2-1) a sixth winding portion in which the second wire is wound in a first layer from the first end toward the second end; (2-2) a seventh winding portion in which the first wire is wound in a second layer from the first end toward the second end to a midpoint of the range in which the sixth winding portion extends; (2-3) a fourth transposition portion where the first wire is redirected from the end of the seventh winding portion on the second end side to the first end side and led to a position of a third layer; (2-4) an eighth winding portion in which the first wire is connected to the fourth transposition portion and wound M turns (M is a natural number) in a third layer; (2-5) a fifth transition portion where the first wire is guided from the eighth winding portion to a position of the first layer; (2-6) a ninth winding portion in which the first wire is connected to the fifth transposition portion and wound toward the second end portion in a first layer; (2-7) a sixth transposition portion where the second wire is redirected from the end of the sixth winding portion on the second end side to the first end side and led to the position of the second layer; (2-8) a tenth winding portion in which the second wire is connected to the sixth transposition portion and wound toward the second end portion in a second layer; and With respect to the direction of deviation between the first wire and the second wire, when a turn of the second wire is closer to the second end than the turn of the first wire that is the same as the turn of the second wire, the deviation is considered to be in a positive direction, and when the turn of the second wire is closer to the second end than the turn of the first wire that is the same as the turn of the first wire, the deviation is considered to be in a negative direction. Each of the first winding region and the second winding region has a positive direction deviation region in which the turns between the first wire and the second wire are shifted in a positive direction and a negative direction deviation region in which the turns are shifted in a negative direction. Coil parts.

[0268] <6> a core including a winding core portion having a first end and a second end opposite to each other in an axial direction; a first wire and a second wire wound helically around the winding core with substantially the same number of turns; Equipped with When the layer closest to the peripheral surface of the winding core portion among the multiple layers formed by the first wire and the second wire wound around the winding core portion is expressed as the first layer, the layer wound on the outer periphery of the first layer while fitting into a recess formed between adjacent turns of the wire located in the first layer is expressed as the second layer, and the layer wound on the outer periphery of the second layer while fitting into a recess formed between adjacent turns of the wire located in the second layer is expressed as the third layer, a plurality of winding regions including at least a first winding region and a second winding region are arranged along the axial direction; The first winding region is (1-1) a first winding portion in which the first wire is wound in a first layer from the first end toward the second end; (1-2) a second winding portion in which the second wire is wound in a second layer from the first end toward the second end to a midpoint of the range in which the first winding portion extends; (1-3) a first transposition portion where the second wire is redirected from the end of the second winding portion on the second end side to the first end side and led to a position of a third layer; (1-4) a third winding portion in which the second wire is connected to the first transposition portion and wound N turns (N is a natural number) in a third layer; (1-5) a second transition portion where the second wire is guided from the third winding portion to a position of the first layer; (1-6) a fourth winding portion in which the second wire is connected to the second transposition portion and wound toward the second end portion in a first layer; (1-7) a third transposition portion where the first wire is redirected from the end of the first winding portion on the second end side to the first end side and led to a position of the second layer; (1-8) a fifth winding portion in which the first wire is connected to the third transposition portion and wound toward the second end portion in a second layer; and The layer on which the first wire is located alternates between the first winding portion and the fifth winding portion, and the layer on which the second wire is located alternates between the second winding portion and the fourth winding portion; The second winding region is (2-1) a sixth winding portion in which the first wire is wound in a first layer from the first end toward the second end; (2-2) a seventh winding portion in which the second wire is wound in a second layer from the first end toward the second end to a midpoint of the range in which the sixth winding portion extends; (2-3) a fourth transposition portion where the second wire is redirected from the end of the seventh winding portion on the second end side to the first end side and led to the position of the third layer; (2-4) an eighth winding portion in which the second wire is connected to the fourth transposition portion and wound M turns (M is a natural number) in a third layer; (2-5) a fifth transition portion where the second wire is guided from the eighth winding portion to a position of the first layer; (2-6) a ninth winding portion in which the second wire is connected to the fifth transposition portion and wound toward the second end portion in the first layer; (2-7) a sixth transposition portion where the first wire is redirected from the end of the sixth winding portion on the second end side to the first end side and led to the position of the second layer; (2-8) a tenth winding portion in which the first wire is connected to the sixth transposition portion and wound toward the second end portion in a second layer; and The layer on which the first wire is located alternates between the sixth winding portion and the tenth winding portion, and the layer on which the second wire is located alternates between the seventh winding portion and the ninth winding portion; With respect to the direction of deviation between the first wire and the second wire, when a turn of the second wire is closer to the second end than the turn of the first wire that is the same as the turn of the second wire, the deviation is considered to be in a positive direction, and when the turn of the second wire is closer to the second end than the turn of the first wire that is the same as the turn of the first wire, the deviation is considered to be in a negative direction. Each of the first winding region and the second winding region has a positive direction deviation region in which the turns between the first wire and the second wire are shifted in a positive direction and a negative direction deviation region in which the turns are shifted in a negative direction. Coil parts.

[0269] <7> the negative direction deviation region is present on either the first end side or the second end side of the boundary between the second winding portion and the fifth winding portion, the positive direction deviation region is present on the other of the first end side and the second end side of the boundary between the second winding portion and the fifth winding portion, the positive direction deviation region is present on either the first end side or the second end side of the boundary between the seventh winding portion and the tenth winding portion, the negative-positive direction deviation region is present on the other of the first end side and the second end side of the boundary between the seventh winding portion and the tenth winding portion; <5> or <6> The coil component according to claim 1.

[0270] <8> a −0.5 turn shift region, in which the first wire and the second wire are shifted by 0.5 turns in a negative direction, is present on either the first end side or the second end side of the boundary between the second winding portion and the fifth winding portion; a +(N-0.5) turn misalignment region is present on the other of the first end side and the second end side of the boundary between the second winding portion and the fifth winding portion, where the first wire and the second wire are misaligned by (N-0.5) turns in a positive direction; a +0.5 turn shift region is present on either the first end side or the second end side of the boundary between the seventh winding portion and the tenth winding portion, where the first wire and the second wire are shifted by 0.5 turns in the positive direction, A −(N−0.5) turn misalignment region exists on either the first end side or the second end side of the boundary between the seventh winding portion and the tenth winding portion, where the first wire and the second wire are misaligned by (N−0.5) turns in the negative direction. <7> The coil component according to claim 1.

[0271] <9> a −0.5 turn shift region, in which the first wire and the second wire are shifted by 0.5 turns in a negative direction, is present on either the first end side or the second end side of the boundary between the second winding portion and the fifth winding portion; a +(N+0.5) turn misalignment region is present on either the first end side or the second end side of the boundary between the second winding portion and the fifth winding portion, where the first wire and the second wire are misaligned by (N+0.5) turns in a positive direction, a +0.5 turn shift region is present on either the first end side or the second end side of the boundary between the seventh winding portion and the tenth winding portion, where the first wire and the second wire are shifted by 0.5 turns in the positive direction, a −(M+0.5) turn misalignment region, in which the first wire and the second wire are misaligned by (M+0.5) turns in the negative direction, is present on either the first end side or the second end side of the boundary between the seventh winding portion and the tenth winding portion; <7> The coil component according to claim 1.

[0272] <10> the number of turns by which the second wire is wound around the winding core portion in the third winding portion is different from the number of turns by which the first wire is wound around the winding core portion in the eighth winding portion; <5> Or <9> The coil component according to any one of the preceding claims.

[0273] <11> At an end of the first winding portion on the first end side, the second wire has an intentional stepped portion that is adjacent to the first layer in which the first wire is located and that contacts the circumferential surface of the winding core portion. <1> Or <10> The coil component according to any one of the preceding claims. [Explanation of symbols]

[0274] 1 Coil parts 2 cores 3 First Wire 4 Second Wire 5 Winding core 6 Axial direction 7 First end 8 Second end Z1~Z3 Winding area W1~W12 winding part R1~R6 dislocation part d,d1,d2 Intentional paragraph gaps S Replacement part F1 +0.5 turn deviation area F2 -1.5 turn shift area F3 -0.5 turn shift range F4 +1.5 turn offset F5 -2.5 turn offset F6 +2.5 turn offset area

Claims

1. a core including a winding core portion having a first end and a second end opposite to each other in an axial direction; a first wire and a second wire wound helically around the winding core with substantially the same number of turns; Equipped with Among the multiple layers formed by the first wire and the second wire wound around the winding core, the layer closest to the circumferential surface of the winding core is referred to as the first layer, the layer wound on the outer circumferential side of the first layer while fitting into a recess formed between adjacent turns of the wire located in the first layer is referred to as the second layer, and the layer wound on the outer circumferential side of the second layer while fitting into a recess formed between adjacent turns of the wire located in the second layer is referred to as the third layer. a plurality of winding regions including at least a first winding region and a second winding region, in which the first wire and the second wire have different winding states, are arranged along the axial direction; The first winding region comprises: (1-1) a first winding portion in which the first wire is wound in a first layer from the first end toward the second end; (1-2) a second winding portion in which the second wire is wound in a second layer from the first end toward the second end to a midpoint of the range in which the first winding portion extends; (1-3) a first transposition portion in which the second wire is redirected from the end of the second winding portion on the second end side to the first end side and led to a position of a third layer; (1-4) a third winding portion in which the second wire is connected to the first transposition portion and wound N turns (N is a natural number) in a third layer; (1-5) a second transition portion where the second wire is led from the third winding portion to a position of a second layer; (1-6) a fourth winding portion in which the second wire is connected to the second transposition portion and wound toward the second end portion in a second layer; and Between the first winding region and the second winding region, the first wire and the second wire exchange layers in which they are located; The second winding region is (2-1) a fifth winding portion in which the second wire is wound in a first layer from the first end toward the second end; (2-2) a sixth winding portion in which the first wire is wound in a second layer from the first end toward the second end to a midpoint of the range in which the fifth winding portion extends; (2-3) a third transposition portion in which the first wire is redirected from the end of the sixth winding portion on the second end side to the first end side and led to a position of a third layer; (2-4) a seventh winding portion in which the first wire is connected to the third transposition portion and wound M turns (M is a natural number) in a third layer; (2-5) a fourth transition portion where the first wire is led from the seventh winding portion to a position of the second layer; (2-6) an eighth winding portion in which the first wire is connected to the fourth transposition portion and wound toward the second end portion in a second layer; and With respect to the direction of deviation between the first wire and the second wire, when a turn of the second wire is closer to the second end than the turn of the first wire that is the same as the turn of the second wire, the deviation is considered to be in a positive direction, and when the turn of the second wire is closer to the second end than the turn of the first wire that is the same as the turn of the first wire, the deviation is considered to be in a negative direction. Each of the first winding region and the second winding region has a positive direction deviation region in which turns are deviated in a positive direction between the first wire and the second wire, and a negative direction deviation region in which turns are deviated in a negative direction between the first wire and the second wire. Coil parts.

2. the positive direction deviation region is present on either the first end side or the second end side of the boundary between the second winding portion and the fourth winding portion, the negative direction deviation region is present on the other of the first end side and the second end side of the boundary between the second winding portion and the fourth winding portion, the negative direction deviation region is present on either the first end side or the second end side of the boundary between the sixth winding portion and the eighth winding portion, the positive direction deviation region is present on the other of the first end side and the second end side of the boundary between the sixth winding portion and the eighth winding portion; The coil component according to claim 1 .

3. a +0.5 turn shift region is present on either the first end side or the second end side of the boundary between the second winding portion and the fourth winding portion, where the first wire and the second wire are shifted by 0.5 turns in a positive direction, a −(N−0.5) turn misalignment region is present on either the first end side or the second end side of the boundary between the second winding portion and the fourth winding portion, where the first wire and the second wire are misaligned by (N−0.5) turns in a negative direction; a −0.5 turn shift region is present on either the first end side or the second end side of the boundary between the sixth winding portion and the eighth winding portion, where the first wire and the second wire are shifted by 0.5 turns in a negative direction, a +(M-0.5) turn misalignment region is present on either the first end side or the second end side of the boundary between the sixth winding portion and the eighth winding portion, where the first wire and the second wire are misaligned by (M-0.5) turns in the positive direction; The coil component according to claim 2 .

4. 2. The coil component according to claim 1, wherein the number of turns by which the second wire is wound around the winding core portion in the third winding portion is different from the number of turns by which the first wire is wound around the winding core portion in the eighth winding portion.

5. a core including a winding core portion having a first end and a second end opposite to each other in an axial direction; a first wire and a second wire wound helically around the winding core with substantially the same number of turns; Equipped with Among the multiple layers formed by the first wire and the second wire wound around the winding core, the layer closest to the circumferential surface of the winding core is referred to as the first layer, the layer wound on the outer circumferential side of the first layer while fitting into a recess formed between adjacent turns of the wire located in the first layer is referred to as the second layer, and the layer wound on the outer circumferential side of the second layer while fitting into a recess formed between adjacent turns of the wire located in the second layer is referred to as the third layer. a plurality of winding regions including at least a first winding region and a second winding region, in which the first wire and the second wire have different winding states, are arranged along the axial direction; The first winding region comprises: (1-1) a first winding portion in which the first wire is wound in a first layer from the first end toward the second end; (1-2) a second winding portion in which the second wire is wound in a second layer from the first end toward the second end to a midpoint of the range in which the first winding portion extends; (1-3) a first transposition portion in which the second wire is redirected from the end of the second winding portion on the second end side to the first end side and led to a position of a third layer; (1-4) a third winding portion in which the second wire is connected to the first transposition portion and wound N turns (N is a natural number) in a third layer; (1-5) a second transition portion where the second wire is led from the third winding portion to a position of the first layer; (1-6) a fourth winding portion in which the second wire is connected to the second transposition portion and wound toward the second end portion in a first layer; (1-7) a third transposition portion in which the first wire is redirected from the end of the first winding portion on the second end side to the first end side and led to a position of the second layer; (1-8) a fifth winding portion in which the first wire is connected to the third transposition portion and wound toward the second end portion in a second layer; and Between the first winding region and the second winding region, the first wire and the second wire exchange layers in which they are located; The second winding region is (2-1) a sixth winding portion in which the second wire is wound in a first layer from the first end toward the second end; (2-2) a seventh winding portion in which the first wire is wound in a second layer from the first end toward the second end to a part of the range in which the sixth winding portion extends; (2-3) a fourth transposition portion in which the first wire is redirected from the end of the seventh winding portion on the second end side to the first end side and led to a position of a third layer; (2-4) an eighth winding portion in which the first wire is connected to the fourth transposition portion and wound M turns (M is a natural number) in a third layer; (2-5) a fifth transition portion where the first wire is led from the eighth winding portion to a position of the first layer; (2-6) a ninth winding portion in which the first wire is connected to the fifth transposition portion and wound toward the second end portion in a first layer; (2-7) a sixth transposition portion in which the second wire is redirected from the end of the sixth winding portion on the second end side to the first end side and led to the position of the second layer; (2-8) a tenth winding portion in which the second wire is connected to the sixth transposition portion and wound toward the second end portion in a second layer; and With respect to the direction of deviation between the first wire and the second wire, when a turn of the second wire is closer to the second end than the turn of the first wire that is the same as the turn of the second wire, the deviation is considered to be in a positive direction, and when the turn of the second wire is closer to the second end than the turn of the first wire that is the same as the turn of the first wire, the deviation is considered to be in a negative direction. Each of the first winding region and the second winding region has a positive direction deviation region in which turns are deviated in a positive direction between the first wire and the second wire, and a negative direction deviation region in which turns are deviated in a negative direction between the first wire and the second wire. Coil parts.

6. a core including a winding core portion having a first end and a second end opposite to each other in an axial direction; a first wire and a second wire wound helically around the winding core with substantially the same number of turns; Equipped with Among the multiple layers formed by the first wire and the second wire wound around the winding core, the layer closest to the circumferential surface of the winding core is referred to as the first layer, the layer wound on the outer circumferential side of the first layer while fitting into a recess formed between adjacent turns of the wire located in the first layer is referred to as the second layer, and the layer wound on the outer circumferential side of the second layer while fitting into a recess formed between adjacent turns of the wire located in the second layer is referred to as the third layer. a plurality of winding zones including at least a first winding zone and a second winding zone are arranged along the axial direction; The first winding region comprises: (1-1) a first winding portion in which the first wire is wound in a first layer from the first end toward the second end; (1-2) a second winding portion in which the second wire is wound in a second layer from the first end toward the second end to a midpoint of the range in which the first winding portion extends; (1-3) a first transposition portion in which the second wire is redirected from the end of the second winding portion on the second end side to the first end side and led to a position of a third layer; (1-4) a third winding portion in which the second wire is connected to the first transposition portion and wound N turns (N is a natural number) in a third layer; (1-5) a second transition portion where the second wire is led from the third winding portion to a position of the first layer; (1-6) a fourth winding portion in which the second wire is connected to the second transposition portion and wound toward the second end portion in a first layer; (1-7) a third transposition portion in which the first wire is redirected from the end of the first winding portion on the second end side to the first end side and led to a position of the second layer; (1-8) a fifth winding portion in which the first wire is connected to the third transposition portion and wound toward the second end portion in a second layer; and The layer on which the first wire is located alternates between the first winding portion and the fifth winding portion, and the layer on which the second wire is located alternates between the second winding portion and the fourth winding portion; The second winding region is (2-1) a sixth winding portion in which the first wire is wound in a first layer from the first end toward the second end; (2-2) a seventh winding portion in which the second wire is wound in a second layer from the first end toward the second end to a midpoint of the range in which the sixth winding portion extends; (2-3) a fourth transposition portion in which the second wire is redirected from the end of the seventh winding portion on the second end side to the first end side and led to a position of a third layer; (2-4) an eighth winding portion in which the second wire is connected to the fourth transposition portion and wound M turns (M is a natural number) in the third layer; (2-5) a fifth transition portion where the second wire is led from the eighth winding portion to a position of the first layer; (2-6) a ninth winding portion in which the second wire is connected to the fifth transposition portion and wound toward the second end portion in the first layer; (2-7) a sixth transposition portion in which the first wire is redirected from the end of the sixth winding portion on the second end side to the first end side and led to a position of the second layer; (2-8) a tenth winding portion in which the first wire is connected to the sixth transposition portion and wound toward the second end portion in a second layer; and The layer on which the first wire is located alternates between the sixth winding portion and the tenth winding portion, and the layer on which the second wire is located alternates between the seventh winding portion and the ninth winding portion; With respect to the direction of deviation between the first wire and the second wire, when a turn of the second wire is closer to the second end than the turn of the first wire that is the same as the turn of the second wire, the deviation is considered to be in a positive direction, and when the turn of the second wire is closer to the second end than the turn of the first wire that is the same as the turn of the first wire, the deviation is considered to be in a negative direction. Each of the first winding region and the second winding region has a positive direction deviation region in which turns are deviated in a positive direction between the first wire and the second wire, and a negative direction deviation region in which turns are deviated in a negative direction between the first wire and the second wire. Coil parts.

7. the negative direction deviation region is present on either the first end side or the second end side of the boundary between the second winding portion and the fifth winding portion, the positive direction deviation region is present on the other of the first end side and the second end side of the boundary between the second winding portion and the fifth winding portion, the positive direction deviation region is present on either the first end side or the second end side of the boundary between the seventh winding portion and the tenth winding portion, the negative-positive direction deviation region is present on the other of the first end side and the second end side of the boundary between the seventh winding portion and the tenth winding portion; The coil component according to claim 5 or 6.

8. a −0.5 turn shift region is present on either the first end side or the second end side of the boundary between the second winding portion and the fifth winding portion, where the first wire and the second wire are shifted by 0.5 turns in a negative direction, a +(N-0.5) turn misalignment region is present on either the first end side or the second end side of the boundary between the second winding portion and the fifth winding portion, where the first wire and the second wire are misaligned by (N-0.5) turns in a positive direction; a +0.5 turn shift region is present on either the first end side or the second end side of the boundary between the seventh winding portion and the tenth winding portion, where the first wire and the second wire are shifted by 0.5 turns in the positive direction, A −(N−0.5) turn misalignment region exists on either the first end side or the second end side of the boundary between the seventh winding portion and the tenth winding portion, where the first wire and the second wire are misaligned by (N−0.5) turns in the negative direction. The coil component according to claim 7 .

9. a −0.5 turn shift region is present on either the first end side or the second end side of the boundary between the second winding portion and the fifth winding portion, where the first wire and the second wire are shifted by 0.5 turns in a negative direction, a +(N+0.5) turn misalignment region is present on either the first end side or the second end side of the boundary between the second winding portion and the fifth winding portion, where the first wire and the second wire are misaligned by (N+0.5) turns in a positive direction; a +0.5 turn shift region is present on either the first end side or the second end side of the boundary between the seventh winding portion and the tenth winding portion, where the first wire and the second wire are shifted by 0.5 turns in the positive direction, a −(M+0.5) turn misalignment region, in which the first wire and the second wire are misaligned by (M+0.5) turns in the negative direction, is present on either the first end side or the second end side of the boundary between the seventh winding portion and the tenth winding portion; The coil component according to claim 7 .

10. 7. The coil component according to claim 5, wherein the number of turns by which the second wire is wound around the winding core portion in the third winding portion is different from the number of turns by which the first wire is wound around the winding core portion in the eighth winding portion.

11. 7. The coil component according to claim 1, wherein the second wire has an intentional stepped-down portion at an end of the first winding portion on the first end side, the second wire being aligned with a first layer in which the first wire is located and in contact with the circumferential surface of the winding core portion.

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