Coil component and method of manufacturing the same

Abstract

To provide a coil component in which a positional displacement of a wire wound around a winding core part is hard to occur and an unwanted change of electric characteristics caused by the positional displacement of the wire is hard to occur, and a method of manufacturing the same.SOLUTION: In a coil component 1 comprising: a drum-shaped core 2 including a winding core part 3, and a first flange part 5 and a second flange part 6 respectively provided in a first end portion and a second end portion which are opposite to each other in an axial direction AX of the winding core part 3; a plate-shaped core 8 including a first principal surface 9 and a second principal surface 10 which are turned in mutually opposite directions and disposed in such a state that the first principal surface 9 is directed to the side of the winding core part 3 and bridges the first flange part 5 and the second flange part 6; and wires 19 and 20 which are wound around the winding core part 3 in a state where a plurality of turns is formed, at least a part of the wires 19 and 20 is fixed to the first principal surface 9 of the plate-shaped core 8 by a fixture member 22 including a resin.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a coil component and a manufacturing method thereof, which comprises a drum-shaped core having a winding core around which a wire is wound and a first flange and a second flange provided at each end of the winding core, and which comprises a plate-shaped core arranged in a state spanning the first flange and the second flange, and in particular, relates to an improvement for stabilizing the winding state of the wire around the winding core. [Background technology]

[0002] For example, Patent Publication No. 2022-34593 (Patent Document 1) describes a coil component that includes a drum-shaped core having a winding core portion and a first flange portion and a second flange portion provided at each end of the winding core portion, and a wire is wound around the winding core portion of the drum-shaped core. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-34593 Summary of the Invention [Problem to be solved by the invention]

[0004] When a coil component is transported or mounted, for example, some external force is applied to the coil component. In the case of a coil component having a structure such as that described in Patent Document 1, the external force can sometimes cause the position of the wire wound around the winding core to shift. This wire position shift is undesirable because it causes undesirable changes in the electrical characteristics of the coil component.

[0005] Therefore, an object of the present disclosure is to stabilize the state in which the wire is wound around the winding core in a coil component. [Means for solving the problem]

[0006] The present disclosure is first directed to a coil component comprising a drum-shaped core having a winding core portion and a first flange portion and a second flange portion respectively provided at a first end portion and a second end portion opposite each other in the axial direction of the winding core portion, and a wire wound around the winding core portion in a state forming a plurality of turns.

[0007] In order to solve the above-mentioned technical problems, the coil component according to the present disclosure further includes a plate-shaped core having a first main surface and a second main surface facing in opposite directions, the first main surface facing the winding core, and disposed between the first flange and the second flange, and characterized in that at least a portion of the wire is fixed to the first main surface of the plate-shaped core by a fixing member containing resin.

[0008] The present disclosure is also directed to a method for manufacturing a coil component including: a drum-shaped core having a winding core portion and a first flange portion and a second flange portion provided at a first end portion and a second end portion, respectively, that are opposite to each other in the axial direction of the winding core portion; a plate-shaped core having a first main surface and a second main surface facing in opposite directions to each other, with the first main surface facing the winding core portion and arranged in a state spanning the first flange portion and the second flange portion; and a wire wound in a state forming multiple turns around the winding core portion.

[0009] In order to solve the above-mentioned technical problems, the manufacturing method of a coil component according to the present disclosure is characterized by comprising a winding process of winding a wire around a winding core portion, a resin application process of applying a resin to the wire, and a fixing process of fixing at least a portion of the wire to a first main surface of a plate-shaped core via the resin. [Effects of the Invention]

[0010] According to the present disclosure, the wire wound around the winding core is fixed to the plate-shaped core, which stabilizes the state of the wire wound around the winding core. Therefore, even if an external force is applied during transportation or mounting of the coil component, the wire is less likely to shift in position, and undesired changes in the electrical characteristics of the coil component are less likely to occur. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a front view showing the appearance of a coil device 1 according to a first embodiment of the present disclosure. [Figure 2] FIG. 2 is a bottom view of the coil device 1 shown in FIG. [Figure 3] FIG. 4 is a cross-sectional view of a coil component 1a according to a second embodiment of the present disclosure. [Figure 4] FIG. 10 is a cross-sectional view of a coil component 1b according to a third embodiment of the present disclosure. [Figure 5] FIG. 10 is a cross-sectional view of a coil device 1c according to a fourth embodiment of the present disclosure. [Figure 6] FIG. 10 is a cross-sectional view of a wire 26 used in a fifth embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0012] A coil component 1 according to a first embodiment of the present disclosure will be described with reference to Figures 1 and 2. The coil component 1 constitutes, for example, a common mode choke coil.

[0013] 1, the coil device 1 includes a drum-shaped core 2 made of a magnetic material such as ferrite or a resin containing ferrite powder or magnetic metal powder. The drum-shaped core 2 has a winding core 3 and a first flange 5 and a second flange 6 provided at a first end and a second end, respectively, that are opposite to each other in the axial direction AX of the winding core 3.

[0014] The coil device 1 also includes a plate-shaped core 8 disposed between the first flange 5 and the second flange 6. The plate-shaped core 8 has a first main surface 9 and a second main surface 10 facing in opposite directions. In FIG. 1 , the first main surface 9 faces downward, and the second main surface 10 faces upward. As with the drum-shaped core 2, the plate-shaped core 8 is preferably made of a magnetic material such as ferrite or a resin containing ferrite powder or magnetic metal powder, so that the plate-shaped core 8 cooperates with the drum-shaped core 2 to form a closed magnetic circuit.

[0015] The first flange 5 and the second flange 6 each have bottom surfaces 11 and 12 that face the mounting board (not shown) when mounted, and top surfaces 13 and 14 opposite the bottom surfaces 11 and 12. The top surfaces 13 and 14 of the first flange 5 and the second flange 6 and the first main surface 9 of the plate core 8 face each other.

[0016] As shown in FIG. 2, a first terminal electrode 15 and a third terminal electrode 17 are provided on the bottom surface 11 of the first flange 5, aligned in the width direction W, and a second terminal electrode 16 and a fourth terminal electrode 18 are provided on the bottom surface 12 of the second flange 6, aligned in the width direction W. The terminal electrodes 15-18 are formed, for example, by dipping or printing a conductive paste containing a conductive metal powder such as Ag powder, followed by baking the paste and further plating with Ni and Sn. Alternatively, the terminal electrodes 15-18 may be formed by attaching conductive metal pieces made of a copper-based metal such as tough pitch copper or phosphor bronze to the flanges 5 and 6.

[0017] For example, two wires 19 and 20 are spirally wound around the winding core 3 in parallel with each other, each forming multiple turns. The wires 19 and 20 are made of copper wires insulated with a resin such as polyamideimide, polyurethane, or polyesterimide. One end of the first wire 19 is connected to the first terminal electrode 15, and the other end is connected to the second terminal electrode 16. One end of the second wire 20 is connected to the third terminal electrode 17, and the other end is connected to the fourth terminal electrode 18. The terminal electrodes 15 to 18 are connected to the wire 19 or 20 by, for example, thermocompression bonding, ultrasonic welding, laser welding, or the like.

[0018] The plate-shaped core 8 is separate from the drum-shaped core 2, and as shown in FIG. 1 , is bonded to the first flange 5 and the second flange 6 via an adhesive 21. The adhesive 21 is applied between the first main surface 9 of the plate-shaped core 8 and the top surfaces 13 and 14 of the flanges 5 and 6. The adhesive 21 contains a resin. Examples of the resin that can be used include a thermosetting resin and an ultraviolet-curing resin. To improve the magnetic properties of the coil component 1, the adhesive 21 preferably contains a metal magnetic powder. Examples of the metal magnetic powder that can be used include Ni powder and Fe powder.

[0019] The plate-shaped core 8 may be prepared in a state where it is integrated with the drum-shaped core 2. In this case, it is preferable that a gap be provided in a part of the plate-shaped core 8 or a part of the first flange portion 5 or the second flange portion 6 to define a gap that defines a space that allows the passage of the wires 19 and 20 to be wound around the winding core portion 3 in the winding step of the wires 19 and 20.

[0020] A characteristic feature of this embodiment is that at least a portion of each of the wires 19 and 20 is fixed to the first main surface 9 of the plate core 8. A fixing member 22 responsible for this fixing is shown in FIG. 1. The fixing member 22 contains a resin. Examples of resins that can be used include thermosetting resins, thermoplastic resins, and ultraviolet-curing resins. It is preferable that the adhesive 21 used to bond the plate core 8 to the flanges 5 and 6 contains a resin with the same components as the resin contained in the fixing member 22. This simplifies process management and is efficient because the process of applying the fixing member 22 can be performed simultaneously with the process of applying the adhesive 21. The resin contained in the fixing member 22 may also contain the same metal magnetic powder as the metal magnetic powder used in the adhesive 21. The fixing member 22 and the adhesive 21 may have the same composition.

[0021] As shown in Fig. 1, fixing member 22 is preferably provided so as to fix either the very start or very end turn of wires 19 and 20, which are wound so as to extend spirally around winding core portion 3, to first main surface 9 of plate-shaped core 8. The very start or very end turn of wires 19 and 20 is closest to terminal electrodes 15-18 and is therefore susceptible to the influence of external forces during the mounting process of coil component 1. Therefore, fixing either the very start or very end turn of wires 19 and 20 is effective in preventing misalignment of wires 19 and 20.

[0022] In the above explanation, the terms "the earliest turn" and "the latest turn" are used, but which one is the "first turn" or the "last turn" can be determined arbitrarily, and either way can be said to have essentially the same configuration.

[0023] Although not shown, the fixing member 22 is the portion of the spirally extending wires 19 and 20 that faces the plate-shaped core 8, and does not prevent it from being applied to the entire area in the axial direction AX.

[0024] For example, when some of the turns of each of the wires 19 and 20, such as either the turn closest to the beginning or the turn closest to the end of the winding in the wires 19 and 20, are fixed to the first main surface 9 of the plate-shaped core 8 by the fixing member 22, as shown in Figure 1, the part of the turn fixed by the fixing member 22, i.e., either the turn closest to the beginning or the turn closest to the end of the winding, is positioned higher on the outer periphery of the winding core 3 than the other turns, while forming a larger gap 23 between itself and the winding core 3 compared to the other turns.

[0025] The gap 23 between the wires 19 and 20 and the winding core 3 as described above has the effect of reducing the stray capacitance generated between the wires 19 and 20 and the drum-shaped core 2.

[0026] Also, in this embodiment, as can be seen from Figure 1, the outer peripheral position of the turn of wires 19 and 20 fixed by fixing member 22, i.e., the outer peripheral position of the turn closest to the beginning of winding or the turn closest to the end of winding, is at the same level in the height direction H as the positions of top surfaces 13 and 14 facing the plate-shaped core 8 of first flange portion 5 and second flange portion 6.

[0027] As described above, this embodiment has the features that some of the turns fixed by the fixing members 22 are positioned higher on the outer periphery of the winding core portion 3 than the other turns, and that the outer periphery of the turns fixed by the fixing members 22 is positioned at the same level as the top faces 13 and 14 of the first flange portion 5 and the second flange portion 6 that face the plate-like core 8. With these features, while the resin that becomes the adhesive 21 and the resin that becomes the fixing members 22 are the same, by immersing the wire in the liquid resin once, the application of the adhesive 21 and the application of the fixing members 22 can be achieved simultaneously.

[0028] In this embodiment, the fixing member 22 also functions to fix the first wire 19 and the second wire 20 wound around the winding core 3 to each other. In particular, the turn of the first wire 19 and the turn of the second wire 20 that is the same as the turn of the first wire 19 are fixed to each other by the fixing member 22. Therefore, the relative positional relationship between the first wire 19 and the second wire 20 is maintained in an equal state, thereby achieving excellent characteristics as a common mode choke coil.

[0029] The fixing member 22 has both the function of a first fixing member that fixes the first wire 19 to the first main surface 9 of the plate-shaped core 8 and the function of a second fixing member that fixes the second wire 20 to the first main surface 9 of the plate-shaped core 8.

[0030] The fixing members may be a first fixing member that fixes the first wire 19 to the first main surface 9 of the plate core 8, and a second fixing member that fixes the second wire 20 to the first main surface 9 of the plate core 8. In this case, the first fixing member and the second fixing member may be located in different positions, for example, the first fixing member may fix the turn of the first wire closest to the start of winding, and the second fixing member may fix the turn of the second wire closest to the end of winding.

[0031] Fig. 3 is a cross-sectional view of a coil device 1a according to a second embodiment of the present disclosure. In Fig. 3, elements corresponding to those shown in Fig. 1 are given the same reference numerals, and duplicated explanations will be omitted. Note that Fig. 3 does not show the portion below the central axis line CL of the winding core portion 3. In Fig. 3, the first wire 19 is shaded to distinguish between the first wire 19 and the second wire 20.

[0032] 3, the first wire 19 and the second wire 20 are spirally wound around the winding core 3 while being parallel to each other and each forming a plurality of turns, but the first wire 19 rides on a part of the second wire 20 to form an intersection 24 where it intersects with the second wire 20. The winding state of the first wire 19 tends to become unstable at this intersection 24. Therefore, a fixing member 22 is provided so as to fix the turn of the first wire 19 at the intersection 24 to the first main surface 9 of the plate-shaped core 8.

[0033] As a modified example of the embodiment shown in FIG. 3, in the region where the first wire 19 and the second wire 20 are spirally wound around the winding core portion 3 while being parallel to each other and forming multiple turns each, the first wire 19 and the second wire 20 may be wound in multiple layers, for example, with the first wire 19 on the lower layer side and the second wire 20 on the upper layer side.

[0034] Fig. 4 is a cross-sectional view of a coil device 1b according to a third embodiment of the present disclosure. In Fig. 4, elements corresponding to those shown in Fig. 1 are given the same reference numerals, and duplicated explanations will be omitted. In Fig. 4 as well, the portion below the central axis line CL of the winding core portion 3 is not shown.

[0035] In the embodiment shown in FIG. 4 , only one wire 19 is wound around the winding core 3. The wire 19 has a predetermined number of turns on the lower side around the winding core 3, and an upper turn 25 that rides on the lower turn. The winding state of the wire 19 tends to be unstable at the upper turn 25. Therefore, the fixing member 22 is provided so as to fix the upper turn 25 to the first main surface 9 of the plate core 8.

[0036] 4, the upper layer turn 25 is not limited to one turn, but may be wound two or more turns. In this case, the fixing member 22 may be provided so as to fix some of the upper layer turn 25 to the first main surface 9 of the plate core 8, or may be provided so as to fix all of the upper layer turn 25 to the first main surface 9 of the plate core 8.

[0037] Fig. 5 is a cross-sectional view of a coil device 1c according to a fourth embodiment of the present disclosure. In Fig. 5, elements corresponding to those shown in Fig. 1 are given the same reference numerals, and duplicated explanations will be omitted. In Fig. 5 as well, the portion below the central axis line CL of the winding core portion 3 is not shown.

[0038] 5, the cross section showing the first wire 19 is shaded to clearly distinguish between the first wire 19 and the second wire 20. The first wire 19 is spirally wound along the axial direction AX to form a first layer in contact with the peripheral surface of the winding core 3. The second wire 20 is spirally wound along the axial direction AX with substantially the same number of turns as the first wire 19, with most of the second wire 20 forming a second layer on the outer circumferential side of the first layer.

[0039] In FIG. 5, each of the multiple turns of the first wire 19 and each of the multiple turns of the second wire 20 are connected by line segments. In this way, turns connected by line segments are the same numbered turn when counted from the left end of the winding core 3 in the figure. Numbers are written under each turn of the first wire 19. These numbers indicate the ordinal number of each turn of the first wire 19. Therefore, each turn of the second wire 20 connected by line segments to each turn of the first wire 19 is also the same numbered turn. In the wound state shown in FIG. 5, both the first wire 19 and the second wire 20 have turns 1 to 21.

[0040] 5 , in the region where the first wire 19 and the second wire 20 are spirally wound around the winding core 3 with each forming multiple turns, the first wire 19 and the second wire 20 may be wound in three layers, for example, with the first wire 19 in the first layer and the second wire 20 in the second and third layers. In this case, the winding state of the second wire 20 tends to become unstable in the tenth and eleventh turns of the upper third layer. Therefore, a fixing member 22 is provided to fix the tenth and eleventh turns of the second wire 20 in the upper third layer to the first main surface 9 of the plate-shaped core 8.

[0041] 5, the first wire 19 and the second wire 20 may be wound in four or more layers around the winding core 3. Each layer may be wound with either a turn of the first wire 19 or a turn of the second wire 20, or may be wound with both.

[0042] To manufacture the coil components 1, 1a, 1b, and 1c described above, for example, a winding step of winding the wires 19 and 20 (or the wire 19) around the winding core 3, a resin applying step of applying resin to the wires 19 and 20 (or the wire 19), and a fixing step of fixing at least a portion of the wires 19 and 20 (or the wire 19) to the first main surface 9 of the plate core 8 via the resin are performed. If the plate core 8 is separate from the drum core 2, the fixing step includes a step of fixing the plate core 8 to the first flange 5 and the second flange 6 via the resin.

[0043] In particular, when manufacturing coil components 1, 1a, 1b, and 1c, the resin applied in the resin application process described above becomes fixing member 22, and the resin application process includes a step of applying resin that becomes fixing member 22 to wires 19 and 20 (or wire 19) wound around winding core portion 3.

[0044] When the resin used in the resin application step is an ultraviolet curable resin, the resin is irradiated with ultraviolet light in the fixing step.

[0045] Alternatively, the resin application step may include a step of applying resin to the wires 19 and 20 (or the wire 19) before being wound around the winding core 3. In the fifth embodiment, the wire 26 shown in Fig. 6 is used.

[0046] 6 is a cross-sectional view of a wire 26 used in a fifth embodiment of the present disclosure. The wire 26 includes a core wire 27 made of a highly conductive metal such as copper, a coating layer 18 made of an electrically insulating resin that covers the circumferential surface of the core wire 27, and a fusion layer 29 that covers the coating layer 28. The fusion layer 29 is made of, for example, a thermoplastic resin.

[0047] When the wire 26 shown in Figure 6 is used, the resin application process has already been carried out before the winding process described above, and the fixing process of fixing at least a portion of the wire to the first main surface of the plate-shaped core via the resin includes a process of heating the fusion layer 29.

[0048] In addition, if the above-mentioned fusion layer 29 has highly reliable electrical insulation properties, the covering layer 28 may be omitted and the fusion layer 29 may be formed on the core wire 27.

[0049] Although the present disclosure has been described above in relation to the illustrated embodiments, various other modifications are possible within the scope of the present disclosure.

[0050] For example, the coil component to which the present disclosure is directed may be a common mode choke coil as in the illustrated embodiment, or a single coil, or may be a transformer, a balun, etc. Therefore, the number of wires may be changed depending on the function of the coil component, and the number of terminal electrodes provided on each flange may also be changed accordingly.

[0051] Furthermore, the shapes of the drum-shaped core and the plate-shaped core provided in the coil component are not limited to those shown in the drawings, and can be changed as desired according to the desired design.

[0052] Furthermore, when constructing a coil component according to the present disclosure or implementing a manufacturing method for a coil component according to the present disclosure, partial substitution or combination of configurations or steps is possible between the different embodiments described in this specification.

[0053] The present disclosure includes the following embodiments.

[0054] <1> a drum-shaped core having a winding core portion and a first flange portion and a second flange portion respectively provided at a first end portion and a second end portion opposite to each other in an axial direction of the winding core portion; a plate-shaped core having a first main surface and a second main surface facing in opposite directions, the first main surface facing the winding core portion, and disposed between the first flange portion and the second flange portion; a first wire wound around the winding core to form a plurality of turns; a first fixing member including a resin that fixes at least a portion of the first wire to the first main surface of the plate-shaped core; A coil component comprising:

[0055] <2> The first fixing member fixes either the winding start side turn or the winding end side turn of the first wire to the first main surface of the plate-shaped core. <1> The coil component according to claim 1.

[0056] <3> the plate-shaped core is separate from the drum-shaped core and is joined to the first flange portion and the second flange portion via an adhesive; <1> or <2> The coil component according to claim 1.

[0057] <4> the adhesive contains a resin having the same components as the resin contained in the first fixing member, <3> The coil component according to claim 1.

[0058] <5> the first fixing member and the adhesive contain metal magnetic powder; <3> or <4> The coil component according to claim 1.

[0059] <6> some turns of the first wire are fixed to the first main surface of the plate-shaped core by the first fixing member, and the some turns fixed by the first fixing member are positioned higher on the outer circumferential side of the winding core than the other turns while forming a larger gap between the some turns and the winding core compared to the other turns; <3> Or <5> The coil component according to any one of the preceding claims.

[0060] <7> The outer circumferential position of the part of the turns fixed by the first fixing member is at the same level as the positions of the surfaces of the first flange portion and the second flange portion facing the plate-like core. <6> The coil component according to claim 1.

[0061] <8> The first wire has a predetermined turn on a lower layer side around the winding core portion and an upper layer turn that rides on the lower layer turn, and the first fixing member fixes the upper layer turn to the first main surface of the plate-shaped core. <1> Or <5> The coil component according to any one of the preceding claims.

[0062] <9> The coil further includes a second wire wound around the winding core, wherein the first wire rides on a part of the second wire to form an intersection where it intersects with the second wire, and the first fixing member fixes the turn of the first wire at the intersection to the first main surface of the plate-shaped core. <1> Or <5> The coil component according to any one of the preceding claims.

[0063] <10> The coil further includes a second wire wound around the winding core, wherein the first wire and / or the second wire are wound around the winding core to form first to n-th layers (n is an integer of 3 or more), and the first fixing member fixes the turns of the n-th layer of the first wire and / or the second wire to the first main surface of the plate-shaped core. <1> Or <5> The coil component according to any one of the preceding claims.

[0064] <11> n=3, <10> The coil component according to claim 1.

[0065] <12> The winding core further includes a second wire wound around the winding core, and the first fixing member fixes the first wire and the second wire to each other. <1> Or <11> The coil component according to any one of the preceding claims.

[0066] <13> The coil further includes a second wire wound around the winding core portion and a second fixing member that fixes at least a portion of the second wire to the first main surface of the plate-shaped core. <1> Or <12> The coil component according to any one of the above items.

[0067] <14> a drum-shaped core having a winding core portion and a first flange portion and a second flange portion respectively provided at a first end portion and a second end portion opposite to each other in an axial direction of the winding core portion; a plate-shaped core having a first main surface and a second main surface facing in opposite directions, the first main surface facing the winding core portion, and disposed between the first flange portion and the second flange portion; a wire wound around the winding core to form a plurality of turns; A method for manufacturing a coil component, comprising: a winding step of winding the wire around the winding core; a resin applying step of applying resin to the wire; a fixing step of fixing at least a part of the wire to the first main surface of the plate-shaped core via the resin; A method for manufacturing a coil component, comprising:

[0068] <15> The resin applying step includes applying a resin to the wire wound around the winding core. <14> A method for manufacturing the coil component according to claim 1.

[0069] <16> providing the drum-shaped core; preparing the plate-shaped core separate from the drum-shaped core; Furthermore, the resin application step includes a step of immersing a portion of the wire wound around the winding core in a liquid resin, and simultaneously immersing a portion of each of the first flange portion and the second flange portion of the drum-shaped core in the liquid resin, the fixing step includes a step of fixing at least a part of the wire to the first main surface of the plate core via the resin, and fixing the plate core to the first flange portion and the second flange portion. <15> A method for manufacturing the coil component according to claim 1.

[0070] <17> some turns of the wire wound around the winding core in the winding step are positioned higher than other turns on the outer periphery of the winding core while forming a larger gap between the winding core and the some turns of the wire compared to other turns. <16> A method for manufacturing the coil component according to claim 1.

[0071] <18> The resin applying step includes applying resin to the wire before the wire is wound around the winding core. <14> A method for manufacturing the coil component according to claim 1. [Explanation of symbols]

[0072] 1, 1a, 1b, 1c Coil parts 2 Drum-shaped core 3 Winding core 5 First flange 6 Second flange 8 Plate-shaped core 9 First main surface 10 Second main surface 19 First Wire 20 Second Wire 21 Adhesive 22 Fixing member 24 Intersection 25 Upper Turn 26 wires 29 Fusion layer AX Axial direction

Claims

1. a drum-shaped core having a winding core portion and a first flange portion and a second flange portion respectively provided at a first end portion and a second end portion opposite to each other in an axial direction of the winding core portion; a plate-shaped core having a first main surface and a second main surface facing in opposite directions, the plate-shaped core being disposed so as to bridge the first flange portion and the second flange portion, with the first main surface facing the winding core portion; a first wire wound around the winding core to form a plurality of turns; a first fixing member including a resin that fixes at least a portion of the first wire to the first main surface of the plate-shaped core; A coil component comprising:

2. The coil component according to claim 1 , wherein the first fixing member fixes either the first turn or the last turn of the first wire to the first main surface of the plate-shaped core.

3. The coil component according to claim 1 , wherein the plate-shaped core is separate from the drum-shaped core and is joined to the first flange portion and the second flange portion via an adhesive.

4. The coil component according to claim 3 , wherein the adhesive contains a resin having the same components as a resin contained in the first fixing member.

5. The coil component according to claim 3 , wherein the first fixing member and the adhesive contain magnetic metal powder.

6. 4. The coil component according to claim 3, wherein some turns of the first wire are fixed to the first main surface of the plate-shaped core by the first fixing member, and the some turns fixed by the first fixing member are positioned higher on the outer circumferential side of the winding core than the other turns while forming a larger gap between the some turns and the winding core compared to the other turns.

7. 7. The coil component according to claim 6, wherein the outer peripheral position of the part of the turns fixed by the first fixing member is at the same level as the positions of the surfaces of the first flange portion and the second flange portion facing the plate-shaped core.

8. 2. The coil component according to claim 1, wherein the first wire has a predetermined turn on a lower layer side around the winding core portion and an upper layer turn that rides on the lower layer turn, and the first fixing member fixes the upper layer turn to the first main surface of the plate-shaped core.

9. 2. The coil component according to claim 1, further comprising a second wire wound around the winding core portion, wherein the first wire rides on a portion of the second wire to form an intersection where it intersects with the second wire, and the first fixing member fixes the turn of the first wire at the intersection to the first main surface of the plate core.

10. 2. The coil component according to claim 1, further comprising a second wire wound around the winding core portion, wherein the first wire and / or the second wire are wound around the winding core portion to form first to n-th layers (n is an integer of 3 or more), and the first fixing member fixes the turns of the n-th layer of the first wire and / or the second wire to the first main surface of the plate-shaped core.

11. The coil component according to claim 10, wherein n=3.

12. The coil component according to claim 1 , further comprising a second wire wound around the winding core, wherein the first fixing member fixes the first wire and the second wire to each other.

13. The coil component according to claim 1 , further comprising: a second wire wound around the winding core portion; and a second fixing member that fixes at least a portion of the second wire to the first main surface of the plate-shaped core.

14. a drum-shaped core having a winding core portion and a first flange portion and a second flange portion respectively provided at a first end portion and a second end portion opposite to each other in an axial direction of the winding core portion; a plate-shaped core having a first main surface and a second main surface facing in opposite directions, the plate-shaped core being disposed so as to bridge the first flange portion and the second flange portion, with the first main surface facing the winding core portion; a wire wound around the winding core to form a plurality of turns; A method for manufacturing a coil component, comprising: a winding step of winding the wire around the winding core; a resin applying step of applying resin to the wire; a fixing step of fixing at least a portion of the wire to the first main surface of the plate-shaped core via the resin; A method for manufacturing a coil component, comprising:

15. The method for manufacturing a coil component according to claim 14 , wherein the resin applying step includes a step of applying resin to the wire wound around the winding core.

16. providing the drum-shaped core; preparing the plate-shaped core separate from the drum-shaped core; Furthermore, the resin application step includes a step of immersing a portion of the wire wound around the winding core in a liquid resin, and simultaneously immersing a portion of each of the first flange portion and the second flange portion of the drum-shaped core in the liquid resin, the fixing step includes a step of fixing at least a part of the wire to the first main surface of the plate core via the resin, and fixing the plate core to the first flange portion and the second flange portion. The method for manufacturing a coil component according to claim 15.

17. 17. The method for manufacturing a coil component according to claim 16, wherein some turns of the wire wound around the winding core in the winding step are positioned higher on the outer circumferential side of the winding core than the other turns, while forming a larger gap between the winding core and some turns of the wire compared to the other turns.

18. The method for manufacturing a coil component according to claim 14 , wherein the resin applying step includes a step of applying resin to the wire before the wire is wound around the winding core.

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