Coil component

Abstract

To provide a coil component in which disconnection of a wire near a metal terminal can be suppressed.SOLUTION: A coil component 10 includes a drum core 10C, a first metal terminal 40, and a first wire 81. The drum core 10 includes: a columnar winding core 11; a first flange 21 provided at a first end in a direction along a central axis X of the winding core 11; and a second flange 31 provided at a second end opposite to the first end of the winding core 11. The first metal terminal 40 is provided on the first flange 21. The first metal terminal 40 has a first joining part 45 facing an upper surface of the first flange 21. The first joining part 45 has a first inclined portion 45B having an upper surface inclined in the downward direction toward the winding core 11 in a direction along a left-right axis Z. A first end 81A of the first wire 81 is joined to an upper surface of the first joining part 45. In addition, the first wire 81 overlaps the first inclined portion 45B when viewed downward.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a coil component. [Background technology]

[0002] The coil component described in Patent Document 1 includes a winding core and two flanges. The winding core is rectangular prism-shaped. The two flanges are connected to both ends of the winding core. Each flange protrudes outward from the winding core in a direction perpendicular to the central axis of the winding core. The winding core and flanges form the core of the coil component. The coil component described in Patent Document 1 also includes an electrode and a wire. The electrode is attached to the flange. The wire is wound around the winding core. The end of the wire is attached to the electrode by thermocompression bonding. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-50317 Summary of the Invention [Problem to be solved by the invention]

[0004] In the coil component described in Patent Document 1, the wire that is thermocompression bonded to the electrode portion is crushed on the electrode portion. As a result, the wire on the electrode portion may not maintain its outer diameter before thermocompression bonding and may be deformed into a flattened shape. If the flattened portion of such a wire extends onto the edge of the electrode portion, there is a risk of the wire breaking at that point. [Means for solving the problem]

[0005] In order to solve the above-mentioned problems, the present invention provides a drum core including a columnar winding core, a first flange connected to a first end of the winding core in a direction along a central axis of the winding core, and a second flange connected to a second end of the winding core opposite to the first end, a first metal terminal attached to the first flange, and a first wire wound around the winding core and having a first end and a second end opposite to the first end, wherein the first flange protrudes outward from the winding core in a direction along a vertical axis perpendicular to the central axis, and a second flange connected to a second end of the winding core opposite to the first end. When an axis along the vertical axis is defined as a left-right axis, one of the directions along the vertical axis is defined as an upward direction, and the direction opposite to the upward direction is defined as a downward direction, the first metal terminal has a first joint portion facing an upper surface of the first flange portion, and the first joint portion has a first inclined portion whose upper surface is inclined downward as it approaches the winding core portion in the direction along the left-right axis, a first end of the first wire is joined to the upper surface of the first joint portion, and the first wire is a coil component that overlaps the first inclined portion when viewed facing downward. [Effects of the Invention]

[0006] According to the above configuration, breakage of the wire near the metal terminal can be suppressed. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view of a coil component. [Figure 2] FIG. 2 is a top view of the coil component. [Figure 3] FIG. 3 is an enlarged view of the coil component when viewed in the first negative direction. [Figure 4] FIG. 4 is a top view of a coil component according to a modified example. [Figure 5] FIG. 5 is a perspective view of a coil component according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, an embodiment of a coil component will be described with reference to the drawings. Note that the drawings may show components enlarged to facilitate understanding. The dimensional ratios of the components may differ from those in the actual drawings or from those in other drawings.

[0009] <Overall structure> As shown in FIG. 1, the coil device 10 includes a drum core 10C and a planar core 10F.

[0010] The drum core 10C has a winding core portion 11, a first flange portion 21, and a second flange portion 31. The winding core 11 has a rectangular prism shape and is made of a material such as alumina, Ni-Zn ferrite, synthetic resin, or a mixture thereof.

[0011] The first flange 21 is provided at a first end of the winding core 11 in the direction along the central axis X. In other words, the first flange 21 is connected to the first end of the winding core 11 in the direction along the central axis X. The second flange 31 is provided at a second end of the winding core 11 in the direction along the central axis X. In other words, the second flange 31 is connected to the second end of the winding core 11 in the direction along the central axis X. The first flange 21 and the second flange 31 are made of the same material as the winding core 11. Furthermore, the first flange 21 and the second flange 31 are integrally molded with the winding core 11.

[0012] Here, a specific axis perpendicular to the central axis X is referred to as the vertical axis Y. In the present embodiment, when viewed in a direction along the central axis X, the vertical axis Y is a direction perpendicular to the mounting surface when the coil component 10 is mounted on a substrate. An axis perpendicular to both the central axis X and the vertical axis Y is referred to as the left-right axis Z. One of the directions along the central axis X is referred to as the first positive direction X1, and the direction opposite to the first positive direction X1 is referred to as the first negative direction X2. In the present embodiment, the first positive direction X1 coincides with the direction from the winding core portion 11 to the first flange portion 21. The first negative direction X2 coincides with the direction from the winding core portion 11 to the second flange portion 31. One of the directions along the vertical axis Y is referred to as the upward direction Y1, and the direction opposite to the upward direction Y1 is referred to as the downward direction Y2. One of the directions along the left-right axis Z is referred to as the rightward direction Z1, and the direction opposite to the rightward direction Z1 is referred to as the leftward direction Z2. The upward direction Y1 and downward direction Y2 are used here for convenience and do not specify the direction of gravity. Similarly, the rightward direction Z1 and leftward direction Z2 are used here for convenience and do not limit the left and right directions from a particular viewpoint.

[0013] In this disclosure, the term "upper surface" refers to a surface facing the upward direction Y1 in the direction along the vertical axis Y, and the term "lower surface" refers to a surface facing the downward direction Y2. Note that the "upper surface" does not necessarily have to be strictly perpendicular to the upward direction Y1. For example, when the coil device 10 is viewed from the upward direction Y1 toward the downward direction Y2, the "upper surface of the coil device 10" refers to the surface that can be seen. The same applies to the lower surface.

[0014] When viewed in a direction along the central axis X, the first flange portion 21 protrudes outward relative to the winding core portion 11 in directions along the vertical axis Y and the horizontal axis Z. The first flange portion 21 has a symmetrical shape in the direction along the horizontal axis Z. The first flange portion 21 has an outer end surface 21A. The outer end surface 21A is the surface of the outer surface of the first flange portion 21 that faces the first positive direction X1.

[0015] The first flange 21 has a main body 22 and a protrusion 23. The main body 22 is generally rectangular and has a thin thickness in the direction along the central axis X. When viewed in the first negative direction X2, both edges of the main body 22 on the upper Y1 side and the lower Y2 side are parallel to the left-right axis Z. When viewed in the first negative direction X2, both edges of the main body 22 on the left Z2 side and the right Z1 side are parallel to the up-down axis Y.

[0016] The protrusion 23 protrudes upward in the Y1 direction from the upper surface 22A of the main body 22. The protrusion 23 has a truncated quadrangular pyramid shape whose dimension along the left-right axis Z decreases toward the upward direction Y1. The protrusion 23 is located approximately in the center of the main body 22 in the direction along the left-right axis Z. The dimension of the protrusion 23 along the central axis X is the same as the dimension of the main body 22 in the direction along the central axis X. The main body 22 and the protrusion 23 are integrally molded. That is, there is no clear boundary between the main body 22 and the protrusion 23 inside the first flange 21.

[0017] The second flange 31 has a symmetrical shape to the first flange 21 in the direction along the left-right axis Z. That is, when viewed in the direction along the central axis X, the second flange 31 protrudes outward from the winding core 11 in the directions along the up-down axis Y and the left-right axis Z. The second flange 31 has an outer end surface 31A facing the first negative direction X2. The second flange 31 has a main body 32 and a protruding portion 33. The main body 32 and the protruding portion 33 of the second flange 31 have the same configurations as the main body 22 and the protruding portion 23 of the first flange 21. That is, the protruding portion 33 protrudes upward in the Y1 direction from the upper surface 32A of the main body 32.

[0018] The plate core 10F has a rectangular plate shape. The long sides of the plate core 10F are parallel to the central axis X. The short sides of the plate core 10F are parallel to the left-right axis Z. The plate core 10F is located on the downward direction Y2 side of the drum core 10C. The plate core 10F is connected to both the lower surface of the first flange portion 21 and the lower surface of the second flange portion 31. In other words, the plate core 10F is bridged between the first flange portion 21 and the second flange portion 31. The material of the plate core 10F is the same as the material of the drum core 10C.

[0019] The coil device 10 includes a first metal terminal 40, a second metal terminal 50, a third metal terminal 60, and a fourth metal terminal . The first metal terminal 40 is provided on the first flange 21. That is, the first metal terminal 40 is attached to the first flange 21. The first metal terminal 40 is located on the right side Z1 of the first flange 21 with respect to the central axis X. The second metal terminal 50 is provided on the first flange 21. That is, the second metal terminal 50 is attached to the first flange 21. The second metal terminal 50 is located on the left side Z2 of the first flange 21 with respect to the central axis X. That is, the second metal terminal 50 is attached to a portion of the first flange 21 opposite the first metal terminal 40 across the central axis X in the direction along the left-right axis Z. The third metal terminal 60 is provided on the second flange 31. That is, the third metal terminal 60 is attached to the second flange 31. The third metal terminal 60 is located on the right side in the Z1 direction with respect to the central axis X in the second flange 31. That is, the third metal terminal 60 faces the first metal terminal 40 in the direction along the central axis X. The fourth metal terminal 70 is provided on the second flange 31. That is, the fourth metal terminal 70 is attached to the second flange 31. The fourth metal terminal 70 is located on the left side in the Z2 direction with respect to the central axis X in the second flange 31. That is, the fourth metal terminal 70 faces the second metal terminal 50 in the direction along the central axis X. The first to fourth metal terminals 40 to 70 will be described in detail later.

[0020] As shown in FIG. 2, the coil device 10 includes a first wire 81 and a second wire 91. Although not shown, the first wire 81 includes a copper wire and an insulating coating. The insulating coating covers the outer surface of the copper wire. The first wire 81 has a substantially circular shape in a cross section perpendicular to the direction in which the first wire 81 extends. The first wire 81 has a first end 81A and a second end 81B opposite the first end 81A.

[0021] As shown in FIGS. 1 and 2, a first end 81A of the first wire 81 is joined to the first metal terminal 40 by thermocompression bonding. The first wire 81 extends from the first metal terminal 40 toward the ridgeline of the winding core 11 on the left side (Z2) and the upward side (Y1). When viewed in the first negative direction (X2), the first wire 81 is wound around the winding core 11 so as to progress clockwise toward the first negative direction (X2). A second end 81B of the first wire 81 extends from the ridgeline of the winding core 11 on the right side (Z1) and the downward side (Y2) toward the third metal terminal 60. The second end 81B of the first wire 81 is joined to the third metal terminal 60 by thermocompression bonding.

[0022] Thermocompression bonding is a method of clamping a wire between a metal terminal and a heated jig, melting the wire, and fixing it to the metal terminal. As a result of this fixing method, the insulating coating of the wire near the joint with the metal terminal peels off, exposing the copper wire.

[0023] The second wire 91 has the same configuration as the first wire 81. That is, the second wire 91 includes a copper wire and an insulating coating. The second wire 91 has a first end 91A and a second end 91B opposite to the first end 91A.

[0024] A first end 91A of the second wire 91 is joined to the second metal terminal 50 by thermocompression bonding. The second wire 91 extends from the second metal terminal 50 toward the ridge line of the winding core 11 on the left side (Z2) and the downward side (Y2). When viewed in the first negative direction (X2), the second wire 91 is wound around the winding core 11 so as to progress clockwise toward the first negative direction (X2). A second end 91B of the second wire 91 extends from the ridge line of the winding core 11 on the right side (Z1) and the upward side (Y1) toward the fourth metal terminal 70. The second end 91B of the second wire 91 is joined to the fourth metal terminal 70 by thermocompression bonding.

[0025] <About the first metal terminal> 1, the first metal terminal 40 has a first adhesive portion 41, a first connecting portion 42, a first mounting portion 43, a first extending portion 44, and a first joint portion 45. The first adhesive portion 41, the first connecting portion 42, the first mounting portion 43, the first extending portion 44, and the first joint portion 45 are integrally molded. That is, there is no clear boundary between these members inside the first metal terminal 40.

[0026] 1, the first adhesive portion 41 is substantially plate-shaped. The first adhesive portion 41 is attached to the outer end surface 21A of the first flange portion 21 via an adhesive. The first adhesive portion 41 is a portion of the first metal terminal 40 that faces the outer end surface 21A of the first flange portion 21 in the direction along the central axis X.

[0027] The first connecting portion 42 is connected to an end of the first adhesive portion 41 in the upward direction Y1. The first connecting portion 42 extends from the first adhesive portion 41 in the upward direction Y1. That is, as shown in FIG. 3, the first connecting portion 42 protrudes from the first flange portion 21 in the upward direction Y1 when viewed in the first negative direction X2. Specifically, the first connecting portion 42 protrudes in the upward direction Y1 with respect to the protrusion 23 of the first flange portion 21. As shown in FIG. 1, the first connecting portion 42 is bent by approximately 90 degrees midway toward the first negative direction X2. That is, the end of the first connecting portion 42 opposite to the first adhesive portion 41 faces the first negative direction X2.

[0028] The first mounting portion 43 is connected to the end of the first connecting portion 42 opposite to the first adhesive portion 41. The first mounting portion 43 is flat. A main surface of the first mounting portion 43 is perpendicular to the vertical axis Y. The first mounting portion 43 is the portion of the first metal terminal 40 that is located furthest upward in the Y1 direction. The first mounting portion 43 is spaced apart in the upward Y1 direction from the protruding portion 23 of the first flange 21. In other words, there is a gap between the first mounting portion 43 and the first flange 21. The first mounting portion 43 is the portion that faces the substrate when the coil component 10 is mounted on the substrate.

[0029] As shown in FIG. 3 , the first end of the first extending portion 44 is connected to the end of the first mounting portion 43 on the rightward Z1 side. The first extending portion 44 extends obliquely from the first mounting portion 43 toward the rightward Z1 side and downward Y2 side. The second end of the first extending portion 44 faces the rightward Z1 side. The thickness of the first extending portion 44 decreases midway between the first end and the second end of the first extending portion 44. That is, the thickness at the second end of the first extending portion 44 is smaller than the thickness at the first end of the first extending portion 44. The thickness of the first extending portion 44 is the dimension in a direction perpendicular to the extension direction of the first extending portion 44.

[0030] 1, the first joint portion 45 is connected to the second end of the first extension portion 44. The first joint portion 45 is generally plate-shaped. When viewed in the downward direction Y2, the first joint portion 45 has a generally rectangular shape with its elongated direction along the central axis X.

[0031] 3, the first joint portion 45 faces the upper surface 22A of the main body portion 22 of the first flange 21 along the vertical axis Y. That is, the lower surface of the first joint portion 45 faces the upper surface of the first flange 21. The lower surface of the first joint portion 45 is in contact with the upper surface of the first flange 21. On the other hand, the lower surface of the first joint portion 45 is not fixed to the first flange 21. That is, no adhesive or the like is interposed between the first joint portion 45 and the first flange 21.

[0032] As shown in FIG. 2, the first joint portion 45 has a first flat portion 45A and a first inclined portion 45B. The first flat portion 45A occupies approximately half of the first joint portion 45 on the rightward Z1 side. When viewed in the downward Y2 direction, the first flat portion 45A has a generally rectangular shape elongated in a direction along the central axis X. The upper surface of the first flat portion 45A is perpendicular to the vertical axis Y. The lower surface of the first flat portion 45A is also perpendicular to the vertical axis Y. Therefore, the first flat portion 45A has a generally constant thickness.

[0033] The first inclined portion 45B is adjacent to the first flat portion 45A on the side closer to the winding core 11 in the direction along the left-right axis Z. The first inclined portion 45B extends to a first inclined end 45C, which is the end of the first joint portion 45 on the side closer to the winding core 11 in the direction along the left-right axis Z. The upper surface of the first inclined portion 45B is inclined downward in the direction Y2 as it approaches the winding core 11 in the direction along the left-right axis Z. In other words, the upper surface of the first joint portion 45 is located furthest downward in the direction Y2 at the first inclined end 45C.

[0034] The upper surface of the first inclined portion 45B is flat. That is, the first inclined portion 45B is inclined at a constant angle in the direction along the left-right axis Z. Furthermore, the dimension of the upper surface of the first inclined portion 45B in the direction along the up-down axis Y from the point located furthest up in the Y1 direction to the point located furthest down in the Y2 direction is larger than the outer diameter of the first wire 81. The lower surface of the first inclined portion 45B is perpendicular to the up-down axis Y. The lower surface of the first inclined portion 45B is flush with the lower surface of the first flat portion 45A.

[0035] <About the second metal terminal> 1, the second metal terminal 50 has a second adhesive portion 51, a second connecting portion 52, a second mounting portion 53, a second extending portion 54, and a second joining portion 55. The second adhesive portion 51, the second connecting portion 52, and the second mounting portion 53 have shapes that are inverted from the first adhesive portion 41, the first connecting portion 42, and the first mounting portion 43, respectively, with respect to the direction along the central axis X.

[0036] The second adhesive portion 51 is generally plate-shaped and is attached to the outer end surface 21A of the first flange portion 21 via an adhesive. The second adhesive portion 51 is a portion of the second metal terminal 50 that faces the outer end surface 21A of the first flange portion 21 in the direction along the central axis X.

[0037] The second connecting portion 52 is connected to an end of the second adhesive portion 51 in the upward direction Y1. The second connecting portion 52 extends from the second adhesive portion 51 in the upward direction Y1. That is, as shown in FIG. 3, the second connecting portion 52 protrudes from the first flange portion 21 in the upward direction Y1 when viewed in the first negative direction X2. Specifically, the second connecting portion 52 protrudes in the upward direction Y1 with respect to the protrusion 23 of the first flange portion 21. As shown in FIG. 1, the second connecting portion 52 is bent by approximately 90 degrees midway toward the first negative direction X2. That is, the end of the second connecting portion 52 opposite to the second adhesive portion 51 faces the first negative direction X2.

[0038] The second mounting portion 53 is connected to the end of the second connecting portion 52 opposite to the second adhesive portion 51. The second mounting portion 53 is flat. The main surface of the second mounting portion 53 is perpendicular to the vertical axis Y. The second mounting portion 53 is the portion of the second metal terminal 50 that is located furthest upward in the Y1 direction. The second mounting portion 53 is spaced apart in the upward Y1 direction from the protruding portion 23 of the first flange 21. In other words, there is a gap between the second mounting portion 53 and the first flange 21.

[0039] A first end of the second extending portion 54 is connected to the end of the second mounting portion 53 on the left side in the Z2 direction. The second extending portion 54 extends generally obliquely from the second mounting portion 53 toward the left side in the Z2 direction and downward in the Y2 direction. A second end of the second extending portion 54 faces the left side in the Z2 direction. As shown in FIG. 3 , the thickness dimension of the second extending portion 54 is constant from the first end to the second end of the second extending portion 54.

[0040] The second joint portion 55 faces the upper surface 22A of the main body portion 22 of the first flange 21 along the vertical axis Y. That is, the lower surface of the second joint portion 55 faces the upper surface of the first flange 21. The lower surface of the second joint portion 55 is in contact with the upper surface of the first flange 21. On the other hand, the lower surface of the second joint portion 55 is not fixed to the first flange 21. That is, no adhesive or the like is interposed between the second joint portion 55 and the first flange 21.

[0041] As shown in FIG. 2, the second joint portion 55 has a second flat portion 55A and a second inclined portion 55B. The second flat portion 55A occupies approximately half of the second joint portion 55 on the first positive direction X1 side. When viewed in the downward direction Y2, the second flat portion 55A has a generally rectangular shape elongated in a direction along the left-right axis Z. The upper surface of the second flat portion 55A is perpendicular to the up-down axis Y. The lower surface of the second flat portion 55A is also perpendicular to the up-down axis Y. Therefore, the first flat portion 45A has a generally constant thickness.

[0042] The second inclined portion 55B is adjacent to the second flat portion 55A on the second flange 31 side in the direction along the central axis X. The second inclined portion 55B extends to a second inclined end 55C, which is the end of the second joint portion 55 on the second flange 31 side in the direction along the central axis X. The upper surface of the second inclined portion 55B is inclined downward in the Y2 direction as it approaches the second flange 31 in the direction along the central axis X. In other words, the upper surface of the second joint portion 55 is located furthest downward in the Y2 direction at the second inclined end 55C.

[0043] The upper surface of the second inclined portion 55B is flat. That is, the second inclined portion 55B is inclined at a constant angle in the direction along the central axis X. Furthermore, the dimension of the upper surface of the second inclined portion 55B along the vertical axis Y from the point located most upward in the Y1 direction to the point located most downward in the Y2 direction is larger than the outer diameter of the second wire 91. In other words, the dimension of the upper surface of the second inclined portion 55B along the vertical axis Y from the end in the first positive direction X1 to the end in the first negative direction X2 direction is larger than the outer diameter of the second wire 91. The lower surface of the second inclined portion 55B is perpendicular to the vertical axis Y. The lower surface of the second inclined portion 55B is flush with the lower surface of the second flat portion 55A.

[0044] <About the third metal terminal> 2, the third metal terminal 60 has the same shape as the second metal terminal 50. The third metal terminal 60 has a shape obtained by rotating the second metal terminal 50 by 180 degrees around an axis that is parallel to the vertical axis Y and passes through the center of the winding core 11. The third metal terminal 60 has a third adhesive portion 61, a third connecting portion 62, a third mounting portion 63, a third extending portion 64, and a third joining portion 65.

[0045] The third metal terminal 60 is joined to the outer end surface 31A of the second flange 31 at the third adhesive portion 61. As shown in FIG. 1 , the third bonding portion 65 faces the upper surface 32A of the main body 32 of the second flange 31 along the vertical axis Y. That is, the lower surface of the third bonding portion 65 faces the upper surface of the second flange 31. The lower surface of the third bonding portion 65 is in contact with the upper surface of the second flange 31. On the other hand, the lower surface of the third bonding portion 65 is not fixed to the second flange 31. That is, no adhesive or the like is interposed between the third bonding portion 65 and the second flange 31.

[0046] As shown in FIG. 2, the third joint 65 has a third flat portion 65A and a third inclined portion 65B. The third flat portion 65A occupies approximately half of the third joint 65 on the first negative direction X2 side. When viewed in the downward direction Y2, the third flat portion 65A has a generally rectangular shape elongated in the direction along the left-right axis Z. The upper surface of the third flat portion 65A is perpendicular to the up-down axis Y. The lower surface of the third flat portion 65A is also perpendicular to the up-down axis Y. Therefore, the third flat portion 65A has a generally constant thickness.

[0047] The third inclined portion 65B is adjacent to the third flat portion 65A on the first flange 21 side in the direction along the central axis X. The third inclined portion 65B extends to a third inclined end 65C, which is the end of the third joint 65 on the first flange 21 side in the direction along the central axis X. The upper surface of the third inclined portion 65B is inclined downward in the Y2 direction as it approaches the first flange 21 in the direction along the central axis X. In other words, the upper surface of the third joint 65 is located furthest downward in the Y2 direction at the third inclined end 65C.

[0048] The upper surface of the third inclined portion 65B is flat. That is, the third inclined portion 65B is inclined at a constant angle in the direction along the central axis X. Furthermore, the dimension of the upper surface of the third inclined portion 65B along the vertical axis Y from the point located furthest in the upward direction (Y1) to the point located furthest in the downward direction (Y2) is larger than the outer diameter of the first wire 81. In other words, the dimension of the upper surface of the third inclined portion 65B along the vertical axis Y from the end in the first negative direction (X2) to the end in the first positive direction (X1) is larger than the outer diameter of the first wire 81. The lower surface of the third inclined portion 65B is perpendicular to the vertical axis Y. The lower surface of the third inclined portion 65B is flush with the lower surface of the third flat portion 65A.

[0049] <About the fourth metal terminal> 2, the fourth metal terminal 70 has the same shape as the first metal terminal 40. The fourth metal terminal 70 has a shape obtained by rotating the first metal terminal 40 by 180 degrees around an axis that is parallel to the vertical axis Y and passes through the center of the winding core 11. The fourth metal terminal 70 has a fourth adhesive portion 71, a fourth connecting portion 72, a fourth mounting portion 73, a fourth extending portion 74, and a fourth joining portion 75.

[0050] The fourth metal terminal 70 is joined to the outer end surface 31A of the second flange 31 at a fourth adhesive portion 71. As shown in FIG. 1 , the fourth joint portion 75 faces the upper surface 32A of the main body 32 of the second flange 31 along the vertical axis Y. That is, the lower surface of the fourth joint portion 75 faces the upper surface of the second flange 31. The lower surface of the fourth joint portion 75 is in contact with the upper surface of the second flange 31. On the other hand, the lower surface of the fourth joint portion 75 is not fixed to the second flange 31. That is, no adhesive or the like is interposed between the fourth joint portion 75 and the second flange 31.

[0051] As shown in FIG. 2, the fourth joint portion 75 has a fourth flat portion 75A and a fourth inclined portion 75B. The fourth flat portion 75A occupies approximately half of the fourth joint portion 75 on the leftward Z2 side. When viewed in the downward Y2 direction, the fourth flat portion 75A has a generally rectangular shape elongated in a direction along the central axis X. The upper surface of the fourth flat portion 75A is perpendicular to the vertical axis Y. The lower surface of the fourth flat portion 75A is also perpendicular to the vertical axis Y. Therefore, the fourth flat portion 75A has a generally constant thickness.

[0052] The fourth inclined portion 75B is adjacent to the fourth flat portion 75A on the side of the winding core 11 in the direction along the left-right axis Z. The fourth inclined portion 75B extends to a fourth inclined end 75C, which is the end of the fourth joint portion 75 on the side of the winding core 11 in the direction along the left-right axis Z. The upper surface of the fourth inclined portion 75B is inclined downward in the direction Y2 as it approaches the winding core 11 in the direction along the left-right axis Z. In other words, the upper surface of the fourth joint portion 75 is located furthest downward in the direction Y2 at the fourth inclined end 75C.

[0053] The upper surface of the fourth inclined portion 75B is flat. That is, the fourth inclined portion 75B is inclined at a constant angle in the direction along the left-right axis Z. Furthermore, the dimension of the upper surface of the fourth inclined portion 75B along the vertical axis Y from the point located furthest in the upward direction Y1 to the point located furthest in the downward direction Y2 is larger than the outer diameter of the second wire 91. In other words, the dimension of the upper surface of the fourth inclined portion 75B along the vertical axis Y from the end in the left direction Z2 to the end in the right direction Z1 is larger than the outer diameter of the second wire 91. The lower surface of the fourth inclined portion 75B is perpendicular to the vertical axis Y. The lower surface of the fourth inclined portion 75B is flush with the lower surface of the fourth flat portion 75A.

[0054] <Relationship between thickness dimensions of each metal terminal> 3, the thickness T1 from the lower surface to the upper surface of the first flat portion 45A in the direction along the vertical axis Y is equal to the thickness T2 from the lower surface to the upper surface of the second flat portion 55A in the direction along the vertical axis Y. As described above, the lower surface of the first flat portion 45A is in contact with the upper surface 22A of the main body 22 of the first flange 21. The lower surface of the second flat portion 55A is in contact with the upper surface 22A of the main body 22 of the first flange 21. Therefore, the shortest distance from the upper surface of the first flange 21 to the first flat portion 45A in the direction along the vertical axis Y is equal to the shortest distance from the upper surface of the first flange 21 to the second flat portion 55A in the direction along the vertical axis Y. In this embodiment, the shortest distance from the upper surface of the first flange 21 to the first flat portion 45A is zero.

[0055] The thickness of each planar portion in the direction along the vertical axis Y is equal. That is, the thickness T1 of the first planar portion 45A, the thickness T2 of the second planar portion 55A, the thickness of the third planar portion 65A, and the thickness of the fourth planar portion 75A in the direction along the vertical axis Y are equal.

[0056] Furthermore, the shortest distance from the upper surface of the second flange 31 to the third flat surface 65A in the direction along the vertical axis Y is equal to the shortest distance from the upper surface of the second flange 31 to the fourth flat surface 75A in the direction along the vertical axis Y. In this embodiment, the shortest distance from the upper surface of the second flange 31 to the third flat surface 65A is zero.

[0057] 2, the area of the upper surface of the first flat portion 45A is equal to the area of the upper surface of the second flat portion 55A, the area of the upper surface of the third flat portion 65A, and the area of the upper surface of the fourth flat portion 75A. That is, the area of the upper surface of the flat portion of each metal terminal is equal.

[0058] <Positional relationship between each metal terminal and each wire> A first end 81A of the first wire 81 is joined to an upper surface of the first flat portion 45A and an upper surface of the first inclined portion 45B of the first joint portion 45. When viewed in the downward direction Y2, the first wire 81 overlaps the first inclined portion 45B. When viewed in the downward direction Y2, the first wire 81 also overlaps the first inclined end 45C, which is the end of the first joint portion 45 on the winding core portion 11 side in the direction along the left-right axis Z.

[0059] A second end 81B of the first wire 81 is joined to an upper surface of the third flat portion 65A of the third joint portion 65. When viewed in the downward direction Y2, the first wire 81 overlaps the third inclined portion 65B. When viewed in the downward direction Y2, the first wire 81 also overlaps the third inclined end 65C, which is the end of the first joint portion 45 on the first flange portion 21 side in the direction along the central axis X.

[0060] The first end 81A and the second end 81B of the first wire 81 are deformed into a flattened shape by thermocompression. The first wire 81 is less susceptible to the effects of thermocompression on the first inclined end 45C and the third inclined end 65C. Therefore, the outer diameter of the first wire 81 is maintained on the first inclined end 45C and the third inclined end 65C compared to on the first flat portion 45A and the third flat portion 65A.

[0061] A first end 91A of the second wire 91 is joined to an upper surface of the second flat portion 55A and an upper surface of the second inclined portion 55B of the second joint 55. When viewed in the downward direction Y2, the second wire 91 overlaps the second inclined portion 55B. When viewed in the downward direction Y2, the second wire 91 also overlaps the second inclined end 55C, which is the end of the second joint 55 on the second flange 31 side in the direction along the central axis X.

[0062] A second end 91B of the second wire 91 is joined to an upper surface of the fourth flat portion 75A of the fourth joint portion 75. When viewed in the downward direction Y2, the second wire 91 overlaps the fourth inclined portion 75B. When viewed in the downward direction Y2, the second wire 91 also overlaps the fourth inclined end 75C, which is the end of the fourth joint portion 75 on the winding core portion 11 side in the direction along the left-right axis Z.

[0063] The first end 91A and the second end 91B of the second wire 91 are deformed into a flattened shape by thermocompression. On the other hand, the second wire 91 is less susceptible to the effects of thermocompression on the second inclined end 55C and the fourth inclined end 75C. Therefore, the outer diameter of the second wire 91 is maintained on the second inclined end 55C and the fourth inclined end 75C compared to on the second flat portion 55A and the fourth flat portion 75A.

[0064] <Effects of this embodiment> (1) In the above embodiment, the upper surface of the first inclined portion 45B of the first metal terminal 40 is inclined downward in the Y2 direction toward the winding core 11. Therefore, even if the first wire 81 is deformed by being crushed vertically on the first joint 45 due to thermocompression or the like, the shape of the first wire 81 is likely to be maintained in the state before thermocompression at the portion of the first inclined portion 45B of the first wire 81 on the winding core 11 side. Therefore, breakage of the first wire 81 at the portion of the first wire 81 on the edge of the first joint 45 can be suppressed.

[0065] (2) In the above embodiment, the first joint portion 45 has a first flat portion 45A. Furthermore, the first end 81A of the first wire 81 is joined to the first flat portion 45A. Because the upper surface of this first flat portion 45A is a plane perpendicular to the vertical axis Y, when the crimping tool is pressed along the vertical axis Y, the first wire 81 is crimped onto the first flat portion 45A with a substantially uniform force. Therefore, the crimping force onto the first flat portion 45A is easily controlled. In this regard, the same effect can be achieved with the flat portions of each metal terminal.

[0066] (3) In the above embodiment, when viewed in the downward direction Y2, the first wire 81 overlaps the first inclined end 45C. With this configuration, the first wire 81 passes over the first inclined end 45C, which is located furthest downward in the Y2 direction on the first inclined portion 45B. Therefore, even if the first wire 81 is deformed by being crushed by the vertical axis Y on the first joint portion 45, the first wire 81 is likely to maintain its shape on the first inclined end 45C. In this regard, the inclined ends of each metal terminal also have the same effect.

[0067] (4) In the above embodiment, when viewed in the downward direction Y2, the second wire 91 overlaps the second inclined portion 55B. With this configuration, the second inclined portion 55B is located along the direction in which the second wire 91 is drawn from the portion where the second wire 91 is wound around the winding core 11 toward the second metal terminal 50. Therefore, the effect described in (1) is also achieved near the first end 81A of the second wire 91.

[0068] (5) In the above embodiment, the shortest distance from the upper surface of the first flange 21 to the first flat portion 45A is equal to the shortest distance from the upper surface of the first flange 21 to the second flat portion 55A. With this configuration, when the first wire 81 is thermocompression-bonded to the first flat portion 45A and the second wire 91 is thermocompression-bonded to the second flat portion 55A, the positions of the joining points for each wire are the same in the direction along the vertical axis Y, making it difficult for the load to be biased during crimping.

[0069] (6) In the above embodiment, the thickness T1 from the lower surface to the upper surface of the first flat portion 45A is equal to the thickness T2 from the lower surface to the upper surface of the second flat portion 55A. With this configuration, even when the lower surface of each flat portion contacts the first flange portion 21 during thermocompression bonding with each wire, the thickness of each flat portion is the same, so that the load during crimping is not uneven.

[0070] (7) In the above embodiment, when viewed in the downward direction Y2, the first wire 81 overlaps the third inclined portion 65B. When viewed in the downward direction Y2, the second wire 91 overlaps the fourth inclined portion 75B. Therefore, the third metal terminal 60 and the fourth metal terminal 70 attached to the second flange portion 31 also achieve the same effect as in (1) in joining the wires.

[0071] (8) In the above embodiment, the area of the top surface of each flat portion is equal. Therefore, thermocompression bonding can be performed without changing the load setting when thermocompression bonding the end of each wire to each flat portion for each metal terminal. As a result, the manufacturing process of the coil device 10 can be prevented from becoming complicated.

[0072] (9) In the above embodiment, the dimension along the vertical axis Y from the point on the first inclined portion 45B furthest in the upward direction (Y1) to the point on the downward direction (Y2) is larger than the outer diameter of the first wire 81. With this configuration, the outer diameter of the first wire 81 is maintained on the downward direction (Y2) side of the first inclined portion 45B. Therefore, breakage of the first wire 81 at the boundary between the first joint portion 45 and the outside of the first joint portion 45 can be more reliably prevented. In this regard, the same effect can be achieved with each metal terminal.

[0073] <Example of change> The above-described embodiment and the following modified examples can be implemented in combination with each other to the extent that no technical contradiction occurs.

[0074] The configuration of the coil device 10 is not limited to the above embodiment. For example, the coil device 10 may omit the planar core 10F. Furthermore, the shapes of the first flange 21 and the second flange 31 are not limited to those of the above embodiment. For example, the protrusion 23 of the first flange 21 may be omitted.

[0075] In the above embodiment, the shape of the winding core 11 is not limited to the example of the above embodiment. For example, the shape of the winding core 11 may be an elliptical cylinder, or a polygonal cylinder other than a quadrangular cylinder. In the above embodiment, the shape of each wire is not limited to the example of the above embodiment. When viewed in a cross section perpendicular to the direction in which each wire extends, the shape of the wire may be an ellipse other than a circle, or a polygon.

[0076] In the above embodiment, the outer diameter of each wire is not particularly limited. In the above embodiment, the materials of the drum core 10C and the planar core 10F are not limited to those of the above embodiment. For example, the materials of the drum core 10C and the planar core 10F are not limited to Ni-Zn ferrite, but may be Mn-Zn ferrite. Furthermore, the materials of the drum core 10C and the planar core 10F may be ferrite, alumina, synthetic resin, or a mixture thereof.

[0077] In the above embodiment, the shape of the planar core 10F is not limited to a rectangular plate, but may be, for example, an elliptical plate. In the above embodiment, the shape of the first metal terminal 40 is not limited to the example in the above embodiment. It is sufficient that the first metal terminal 40 has a first bonding portion 45 that faces the upper surface of the first flange portion 21. This also applies to each metal terminal. Specifically, for example, the first metal terminal 40 does not have to have a first adhesive portion and a first connecting portion. In this case, the first metal terminal 40 is fixed to the first flange portion 21 by the first bonding portion 45, the first mounting portion 43, and / or the first extension portion 44.

[0078] In the above embodiment, the first mounting portion 43 and the first joint portion 45 of the first metal terminal 40 may be at the same height along the vertical axis Y. Furthermore, in this case, the first mounting portion 43, the first extending portion 44, and the first joint portion 45 may be flush with each other.

[0079] In the above embodiment, the first bonding portion 45 may be spaced apart from the upper surface of the first flange 21. The first bonding portion 45 may also be fixed to the first flange 21 with an adhesive or the like. This also applies to the second bonding portion 55 to the fourth bonding portion 75.

[0080] In the above embodiment, there does not have to be a clear ridge between the first flat portion 45A and the first inclined portion 45B. That is, the upper surface of the first joint portion 45 may have a curved portion. Furthermore, the upper surface of the first inclined portion 45B is not limited to being flat, but may also be curved. This also applies to the second joint portion 55 to the fourth joint portion 75.

[0081] In the above embodiment, the first joint 45 does not have to have the first flat portion 45A. For example, in the example shown in FIG. 5, the entire first joint 45 is the first inclined portion 45B. In this case, the first end 81A of the first wire 81 only needs to be joined to the upper surface of the first inclined portion 45B. Also, in the example shown in FIG. 5, the entire second joint 55 is the second inclined portion 55B. The entire third joint 65 is the third inclined portion 65B. The entire fourth joint 75 is the fourth inclined portion 75B.

[0082] In the above embodiment, the first end 81A of the first wire 81 does not have to be joined to both the upper surface of the first flat portion 45A and the upper surface of the first inclined portion 45B. That is, the first end 81A of the first wire 81 may be joined to only the upper surface of either the upper surface of the first flat portion 45A or the upper surface of the first inclined portion 45B. The same applies to the second joint portion 55 to the fourth joint portion 75.

[0083] In the above embodiment, the first inclined portion 45B may have a different inclination angle and curvature along the first inclined portion 45B as long as the upper surface thereof is inclined in the downward direction Y2 in the direction along the left-right axis Z toward the winding core portion 11. This also applies to the second inclined portion 55B to the fourth inclined portion 75B, and the inclination angle and curvature may be changed along the inclined portion.

[0084] In the above embodiment, the first wire 81 does not have to overlap the first inclined end 45C when viewed in the downward direction Y2. That is, when viewed in the downward direction Y2, the first wire 81 may pass through the end of the first inclined portion 45B on the second flange portion 31 side in the direction along the central axis X. Even in this case, the first end 81A of the first wire 81 is prevented from being excessively crushed in the portion of the first wire 81 that overlaps the first inclined portion 45B. The same applies to the other inclined ends; when viewed in the downward direction Y2, each wire does not have to overlap the corresponding inclined end.

[0085] In the above embodiment, as long as the first joint portion 45 has the first inclined portion 45B, the second joint portion 55 does not have to have the second inclined portion 55B. The third joint portion 65 does not have to have the third inclined portion 65B. Furthermore, the fourth joint portion 75 does not have to have the fourth inclined portion 75B.

[0086] In the above embodiment, the shortest distance from the upper surface of the first flange 21 to the first flat surface 45A in the direction along the vertical axis Y does not have to be equal to the shortest distance from the upper surface of the first flange 21 to the second flat surface 55A in the direction along the vertical axis Y. The shortest distance from the upper surface of each flange to each flat surface may be different.

[0087] In the above embodiment, the thickness dimension T1 from the lower surface to the upper surface of the first flat surface portion 45A in the direction along the vertical axis Y and the thickness dimension T2 from the lower surface to the upper surface of the second flat surface portion 55A in the direction along the vertical axis Y do not have to be equal. The thickness dimensions of the flat surfaces may be different.

[0088] In the above embodiment, the area of the flat portion of each metal terminal may be different. In the above embodiment, the dimension of the upper surface of the first inclined portion 45B along the vertical axis Y from the point located furthest in the upward direction (Y1) to the point located furthest in the downward direction (Y2) may be smaller than the outer diameter of the first wire 81. This is also true for the other inclined portions.

[0089] In the above embodiment, the second inclined portion 55B of the second metal terminal 50 may be adjacent to the second flat portion 55A in the direction along the left-right axis Z. In the example shown in FIG. 4 , the second metal terminal 50 has a second joint portion 55 facing the upper surface of the first flange portion 21. The second joint portion 55 has a second flat portion 55A and a second inclined portion 55B. The second inclined portion 55B is adjacent to the second flat portion 55A on the side of the winding core 11 in the direction along the left-right axis Z. The upper surface of the second inclined portion 55B is inclined downward in the direction Y2 toward the winding core 11 in the direction along the left-right axis Z. In the example shown in FIG. 4 , the first end 91A of the second wire 91 is joined to the upper surface of the second flat portion 55A of the second joint portion 55, and the second wire 91 overlaps the second inclined portion 55B when viewed in the downward direction Y2.

[0090] In the example shown in FIG. 4, the third metal terminal 60 has a third joint portion 65 facing the upper surface of the second flange portion 31. The third joint portion 65 has a third flat portion 65A and a third inclined portion 65B. The third inclined portion 65B is located closer to the winding core portion 11 than the third flat portion 65A in the direction along the left-right axis Z. The upper surface of the third inclined portion 65B is inclined downward in the direction Y2 as it approaches the winding core portion 11 in the direction along the left-right axis Z. In the example shown in FIG. 4, the second end 81B of the first wire 81 is joined to the upper surface of the third flat portion 65A of the third joint portion 65, and when viewed in the downward direction Y2, the first wire 81 overlaps the third inclined portion 65B.

[0091] 4, the second inclined portion 55B is positioned according to the direction of the second wire 91 drawn from the winding core 11 toward the second metal terminal 50. That is, even in the example shown in FIG. 4, the effect described in (1) of the above embodiment can be obtained in each metal terminal including the second metal terminal 50.

[0092] <Additional Notes> The technical ideas that can be understood from the above-described embodiment and modified examples will be described. [1] A drum core including a columnar winding core, a first flange provided at a first end in a direction along a central axis of the winding core, and a second flange provided at a second end of the winding core opposite the first end; a first metal terminal provided at the first flange; and a first wire wound around the winding core and having a first end and a second end opposite the first end, wherein the first flange protrudes outward from the winding core in a direction along an up-down axis perpendicular to the central axis when viewed from the direction along the central axis, and an axis perpendicular to both the up-down axis and the central axis is defined as a left-right axis, and the up-down axis is defined as a right-left axis. When one of the directions along the axis is defined as the upward direction and the direction opposite to the upward direction is defined as the downward direction, the first metal terminal has a first joint portion, a lower surface of the first joint portion faces an upper surface of the first flange portion, the first joint portion has a first inclined portion, an upper surface of the first inclined portion is inclined so as to face downward as it approaches the winding core portion in the direction along the left-right axis, a first end of the first wire is joined to the upper surface of the first joint portion, and when viewed facing downward, the first wire overlaps the first inclined portion.

[0093] [2] The coil component according to [1], wherein the first joint portion further has a first flat portion, an upper surface of the first flat portion being perpendicular to the vertical axis, and the first inclined portion being adjacent to the first flat portion on the side of the winding core portion in the direction along the horizontal axis.

[0094] [3] The coil component according to [2], wherein the first end of the first wire is joined only at the first flat portion. [4] The coil component according to [2], wherein the first end of the first wire is joined only at the first inclined portion.

[0095] [5] The coil component according to [2], wherein a first end of the first wire is joined to the first inclined portion and the first flat portion. [6] The coil component according to any one of [2] to [5], further comprising: a second metal terminal provided on a portion of the first flange portion opposite the first metal terminal across the central axis in a direction along the left-right axis; and a second wire wound around the winding core portion and having a first end and a second end opposite the first end, wherein the second metal terminal has a second joint portion facing an upper surface of the first flange portion, and the second joint portion has a second flat portion and a second inclined portion adjacent to the second flat portion on the second flange portion side in the direction along the central axis, wherein an upper surface of the second flat portion is perpendicular to the up-down axis, and an upper surface of the second inclined portion is inclined downward as it approaches the second flange portion in the direction along the central axis, and a first end of the second wire is joined to an upper surface of the second joint portion, and when viewed facing downward, the second wire overlaps the second inclined portion.

[0096] [7] The coil component according to any one of [2] to [5], further comprising: a second metal terminal provided in a portion of the first flange portion on the opposite side of the central axis from the first metal terminal in a direction along the left-right axis; and a second wire wound around the winding core portion and having a first end and a second end opposite the first end, wherein the second metal terminal has a second joint portion facing an upper surface of the first flange portion, and the second joint portion has a second flat portion and a second inclined portion adjacent to the second flat portion on the winding core portion side in the direction along the left-right axis, an upper surface of the second flat portion is perpendicular to the up-down axis, and an upper surface of the second inclined portion is inclined downward as it approaches the winding core portion in the direction along the left-right axis, and a first end of the second wire is joined to an upper surface of the second joint portion, and the second wire overlaps the second inclined portion when viewed facing downward.

[0097] [8] The coil component according to [6] or [7], wherein the area of the top surface of the first flat portion is equal to the area of the top surface of the second flat portion. [9] A coil component according to any one of [6] to [8], wherein the shortest distance from the upper surface of the first flange portion to the first flat portion in the direction along the vertical axis is equal to the shortest distance from the upper surface of the first flange portion to the second flat portion in the direction along the vertical axis.

[0098]

[10] A coil component according to [9], wherein the thickness dimension from the lower surface to the upper surface of the first planar portion in the direction along the vertical axis is equal to the thickness dimension from the lower surface to the upper surface of the second planar portion in the direction along the vertical axis.

[0099]

[11] The winding coil further includes a third metal terminal provided on the second flange portion and facing the first metal terminal in a direction along the central axis, and a fourth metal terminal provided on the second flange portion and facing the second metal terminal in a direction along the central axis, wherein the second flange portion protrudes outward relative to the winding core portion in a direction along the vertical axis when viewed from the direction along the central axis, and the third metal terminal has a third joint portion facing an upper surface of the second flange portion, and the third joint portion has a third flat portion and a third inclined portion adjacent to the third flat portion on the winding core portion side in the direction along the left-right axis, and the upper surface of the third flat portion is perpendicular to the vertical axis, and the upper surface of the third inclined portion is inclined downward in the direction along the central axis toward the first flange portion, the fourth metal terminal has a fourth joint portion facing an upper surface of the second flange portion, the fourth joint portion having a fourth flat portion and a fourth inclined portion adjacent to the fourth flat portion on the first flange portion side in a direction along the central axis, the upper surface of the fourth flat portion being perpendicular to the vertical axis, the upper surface of the fourth inclined portion being inclined in the downward direction as it approaches the winding core portion in a direction along the horizontal axis, a second end of the first wire being joined to an upper surface of the third joint portion, and when viewed in the downward direction, the first wire overlaps the third inclined portion, and a second end of the second wire being joined to an upper surface of the fourth joint portion, and when viewed in the downward direction, the second wire overlaps the fourth inclined portion.

[0100]

[12] A coil component according to

[11] , wherein the area of the top surface of the first planar portion, the area of the top surface of the second planar portion, the area of the top surface of the third planar portion, and the area of the top surface of the fourth planar portion are equal.

[0101]

[13] A coil component according to

[11] or

[12] , wherein the thickness dimension from the bottom surface to the top surface of the first planar portion in the direction along the vertical axis, the thickness dimension from the bottom surface to the top surface of the second planar portion in the direction along the vertical axis, the thickness dimension from the bottom surface to the top surface of the third planar portion in the direction along the vertical axis, and the thickness dimension from the bottom surface to the top surface of the fourth planar portion in the direction along the vertical axis are equal.

[0102]

[14] A coil component according to any one of [1] to

[13] , wherein the first inclined portion extends to a first inclined end, which is the end of the first joint portion on the winding core portion side in the direction along the left-right axis, and when viewed in the downward direction, the first wire overlaps the first inclined end.

[0103]

[15] A coil component described in any one of [1] to

[14] , wherein the dimension along the vertical axis from the point located most upward to the point located most downward on the upper surface of the first inclined portion is larger than the outer diameter of the first wire. [Explanation of symbols]

[0104] 10...Coil parts 10C...Drum core 11...Core 21...First flange 31...Second flange 40…First metal terminal 45...1st joint 45A…First plane part 45B…First slope part 50…Second metal terminal 55…Second joint part 55A…Second plane part 55B…Second slope part 60…Third metal terminal 65…Third joint part 65A...Third plane part 65B…Third slope part 70…4th metal terminal 75…4th joint 75A…4th plane part 75B...Fourth inclined section 81...First wire 91...Second wire

Claims

1. a drum core having a columnar winding core, a first flange provided at a first end of the winding core in a direction along a central axis thereof, and a second flange provided at a second end of the winding core opposite to the first end; a first metal terminal provided on the first flange; a first wire wound around the winding core and having a first end and a second end opposite the first end; Equipped with When viewed from a direction along the central axis, the first flange portion protrudes outward relative to the winding core portion in a direction along an up-down axis perpendicular to the central axis, When an axis perpendicular to both the vertical axis and the central axis is defined as a horizontal axis, one of the directions along the vertical axis is defined as an upward direction, and the direction opposite to the upward direction is defined as a downward direction, the first metal terminal has a first joint portion, and a lower surface of the first joint portion faces an upper surface of the first flange portion; the first joint portion has a first inclined portion, and an upper surface of the first inclined portion is inclined in the downward direction toward the winding core portion in the direction along the left-right axis, A first end of the first wire is joined to an upper surface of the first joint portion, and when viewed in the downward direction, the first wire overlaps the first inclined portion. Coil parts.

2. the first joint portion further includes a first flat portion, and an upper surface of the first flat portion is perpendicular to the vertical axis; The first inclined portion is adjacent to the first flat portion on the side of the winding core portion in the direction along the left-right axis. The coil component according to claim 1 .

3. The first end of the first wire is joined only at the first flat portion. The coil component according to claim 2 .

4. The first end of the first wire is joined only at the first inclined portion. The coil component according to claim 2 .

5. A first end of the first wire is joined to the first inclined portion and the first flat portion. The coil component according to claim 2 .

6. a second metal terminal provided on a portion of the first flange portion opposite the first metal terminal across the central axis in a direction along the left-right axis; a second wire wound around the winding core and having a first end and a second end opposite the first end; Furthermore, the second metal terminal has a second joint portion facing an upper surface of the first flange portion, the second joint portion has a second flat portion and a second inclined portion adjacent to the second flat portion on the second flange portion side in the direction along the central axis, an upper surface of the second flat portion is perpendicular to the vertical axis; an upper surface of the second inclined portion is inclined in the direction along the central axis so as to be inclined downward toward the second flange portion, A first end of the second wire is joined to an upper surface of the second joint portion, and when viewed in the downward direction, the second wire overlaps the second inclined portion. The coil component according to claim 2 .

7. a second metal terminal provided on a portion of the first flange portion opposite the first metal terminal across the central axis in a direction along the left-right axis; a second wire wound around the winding core and having a first end and a second end opposite the first end; Furthermore, the second metal terminal has a second joint portion facing an upper surface of the first flange portion, the second joint portion has a second flat portion and a second inclined portion adjacent to the second flat portion on the winding core portion side in the direction along the left-right axis, an upper surface of the second flat portion is perpendicular to the vertical axis; an upper surface of the second inclined portion is inclined in the direction along the left-right axis so as to be inclined downward as it approaches the winding core portion, A first end of the second wire is joined to an upper surface of the second joint portion, and when viewed in the downward direction, the second wire overlaps the second inclined portion. The coil component according to claim 2 .

8. The area of the top surface of the first flat portion is equal to the area of the top surface of the second flat portion. The coil component according to claim 6 or 7.

9. a shortest distance from an upper surface of the first flange portion to the first flat portion in a direction along the vertical axis; The shortest distance from the upper surface of the first flange portion to the second flat portion in the direction along the vertical axis is equal to The coil component according to claim 6 or 7.

10. a thickness dimension from a lower surface to an upper surface of the first planar portion in a direction along the vertical axis; a thickness dimension from the lower surface to the upper surface of the second flat surface portion in a direction along the vertical axis, The coil component according to claim 9 .

11. a third metal terminal provided on the second flange portion and facing the first metal terminal in a direction along the central axis; a fourth metal terminal provided on the second flange portion and facing the second metal terminal in a direction along the central axis; Furthermore, the second flange portion protrudes outward relative to the winding core portion in a direction along the vertical axis when viewed from a direction along the central axis, the third metal terminal has a third joint portion facing an upper surface of the second flange portion, the third joint portion has a third flat portion and a third inclined portion adjacent to the third flat portion on the winding core portion side in the direction along the left-right axis, an upper surface of the third flat surface portion is perpendicular to the vertical axis; an upper surface of the third inclined portion is inclined in the direction along the central axis so as to be inclined downward toward the first flange portion, the fourth metal terminal has a fourth joint portion facing an upper surface of the second flange portion, the fourth joint portion has a fourth flat portion and a fourth inclined portion adjacent to the fourth flat portion on the first flange portion side in the direction along the central axis, an upper surface of the fourth flat surface portion is perpendicular to the vertical axis; an upper surface of the fourth inclined portion is inclined in the direction along the left-right axis so as to be inclined downward as it approaches the winding core portion, a second end of the first wire is joined to an upper surface of the third joint portion, and when viewed in the downward direction, the first wire overlaps the third inclined portion; A second end of the second wire is joined to an upper surface of the fourth joint portion, and when viewed in the downward direction, the second wire overlaps the fourth inclined portion. The coil component according to claim 6 or 7.

12. The area of the top surface of the first flat portion, the area of the top surface of the second flat portion, the area of the top surface of the third flat portion, and the area of the top surface of the fourth flat portion are equal. The coil component according to claim 11.

13. a thickness dimension from a lower surface to an upper surface of the first planar portion in a direction along the vertical axis; a thickness dimension from the lower surface to the upper surface of the second planar portion in a direction along the vertical axis; a thickness dimension from the lower surface to the upper surface of the third flat surface portion in a direction along the vertical axis; a thickness dimension from the lower surface to the upper surface of the fourth flat surface portion in a direction along the vertical axis, The coil component according to claim 11.

14. the first inclined portion extends to a first inclined end that is an end of the first joint portion on the winding core portion side in the direction along the left-right axis, When viewed in the downward direction, the first wire overlaps the first inclined end. The coil component according to claim 1 .

15. The dimension of the upper surface of the first inclined portion along the vertical axis from the point located most upward to the point located most downward is larger than the outer diameter of the first wire. The coil component according to claim 1 .

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