Coil components

Abstract

To provide a coil component that offers high structural stability and improved magnetic properties. [Solution] One embodiment of the present invention provides a coil component comprising a main body, a coil disposed within the main body and including a turn-forming portion, a first lead frame connected to the first end of the coil within the main body and extending outside the main body, and a second lead frame connected to the second end of the coil within the main body and extending outside the main body, wherein, when the winding axis direction of the turn-forming portion is the first direction, at least one of the first lead frame and the second lead frame has at least a portion of the part disposed within the main body that overlaps with at least a portion of the turn-forming portion in the first direction.

Description

Technical Field

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

Background Art

[0002] An inductor, which is one of coil components, is a typical passive electronic component used in electronic devices together with a resistor and a capacitor.

[0003] Recently, the market for power inductors for high currents such as AI, electric fields, and robots has been increasing. In particular, for automotive components, high reliability technology for safety improvement is required, and while satisfying high current characteristics, a high level of vibration resistance is also required. In such coil components, a structure in which a coil is welded to a lead frame connecting from the inside of the main body to the outside is often used.

Summary of the Invention

Problems to be Solved by the Invention

[0004] One of the objects of the present invention is to provide a coil component with high structural stability and improved magnetic characteristics.

Means for Solving the Problems

[0005] To solve the above-described problems, one embodiment of the present invention includes a main body, a coil disposed in the main body and including a turn-forming portion, a first lead frame connected to a first end portion of the coil in the main body and extending outside the main body, and a second lead frame connected to a second end portion of the coil in the main body and extending outside the main body. When the winding axis direction of the turn-forming portion is a first direction, at least one of the first lead frame and the second lead frame provides a coil component in which at least a part of the portion disposed in the main body overlaps at least a part of the turn-forming portion in the first direction.

[0006] In one embodiment, at least one of the first and second ends of the coil can overlap with at least a portion of the turn-forming portion in the first direction.

[0007] In one embodiment, the first lead frame includes a first connecting portion connected to the first end of the coil and a first lead portion extending from the first connecting portion to the outside of the main body, and the second lead frame may include a second connecting portion connected to the second end of the coil and a second lead portion extending from the second connecting portion to the outside of the main body.

[0008] In one embodiment, the first connecting portion can overlap with at least a part of the turn-forming portion in the first direction.

[0009] In one embodiment, the first drawer portion may not overlap with the turn-forming portion in the first direction.

[0010] In one embodiment, the second connecting portion can overlap with at least a part of the turn-forming portion in the first direction.

[0011] In one embodiment, the second drawer portion does not overlap with the turn-forming portion in the first direction.

[0012] In one embodiment, the first connecting portion and the turn-forming portion may include curved surfaces.

[0013] In one embodiment, the first connecting portion and the turn-forming portion can have substantially the same curvature.

[0014] In one embodiment, the second connecting portion may include a curved surface.

[0015] In one embodiment, the second connecting portion and the turn-forming portion can have substantially the same curvature.

[0016] In one embodiment, the first connecting portion can have a shape that maintains the turn of the turn-forming portion.

[0017] In one embodiment, the second connecting portion can have a shape that maintains the turn of the turn-forming portion.

[0018] In one embodiment, based on the area of ​​the plane projected in the first direction, the first connecting portion can overlap with the turn-forming portion by an area of ​​1 / 4 or more.

[0019] In one embodiment, based on the area of ​​the plane projected in the first direction, the first connecting portion can overlap with the turn-forming portion by more than half of its area.

[0020] In one embodiment, based on the area of ​​the plane projected in the first direction, the second connecting portion can overlap with the turn-forming portion by an area of ​​1 / 4 or more.

[0021] In one embodiment, based on the area of ​​the plane projected in the first direction, the second connecting portion can overlap with the turn-forming portion by more than half of its area.

[0022] In one embodiment, the body includes a first surface and a second surface facing the first direction, and the first and second ends of the coil may be arranged adjacent to the first surface of the body.

[0023] In one embodiment, the first and second drawer sections can extend to the first surface of the main body.

[0024] In one embodiment, the second end of the coil may be positioned closer to the center of the turn-forming portion than the first end of the coil.

[0025] In one embodiment, the turn-forming portion can form turns from the first end and the second end of the coil, respectively, toward the second surface of the main body.

[0026] In one embodiment, the first end of the coil can be connected to the surface facing the first surface of the main body at the first connecting portion.

[0027] In one embodiment, the second end of the coil can be connected to the surface facing the first surface of the main body at the second connecting portion.

[0028] In one embodiment, at least one of the first end and the second end of the coil can be non-overlapping with the turn forming portion in the first direction.

[0029] In one embodiment, the first end and the second end of the coil may be disposed inside the turn forming portion.

[0030] In one embodiment, the first end of the coil may be disposed outside the turn forming portion, and the second end of the coil may be disposed inside the turn forming portion.

[0031] In one embodiment, the first connecting portion and the second connecting portion may have different shapes from each other.

[0032] In one embodiment, the first end and the second end of the coil may be disposed outside the turn forming portion.

[0033] In one embodiment, the line widths of the first connecting portion and the second connecting portion may be wider than the line width of the turn forming portion.

[0034] In one embodiment, the line widths of the first connecting portion and the second connecting portion can be two times or more the line width of the turn forming portion.

[0035] In one embodiment, at least one of the first connecting portion and the second connecting portion can be rectangular in a planar shape projected in the first direction.

[0036] In one embodiment, the turn-forming section can form a rectangular turn based on the shape of a plane projected in the first direction.

[0037] Another aspect of the present invention is, The present invention provides a coil component comprising a main body, a coil disposed within the main body and including a turn-forming portion, a first lead frame connected to the first end of the coil within the main body and extending to the outside of the main body, and a second lead frame connected to the second end of the coil within the main body and extending to the outside of the main body, wherein the first lead frame includes a first connecting portion connected to the first end of the coil and a first lead portion extending from the first connecting portion to the outside of the main body, the second lead frame includes a second connecting portion connected to the second end of the coil and a second lead portion extending from the second connecting portion to the outside of the main body, and the first connecting portion has a shape that maintains the turn of the turn-forming portion.

[0038] In one embodiment, the second connecting portion can have a shape that maintains the turn of the turn-forming portion.

[0039] In one embodiment, the main body includes a first and second surface facing the first direction, a third and fourth surface facing the second direction perpendicular to the first direction, and a fifth and sixth surface facing the third direction perpendicular to the first and second directions, and the first and second lead frames can be arranged in the second direction while extending from the first surface of the main body.

[0040] In one embodiment, the first and second ends of the coil can be positioned close to the corner where the fourth and fifth surfaces of the main body meet.

[0041] In one embodiment, the first connecting portion and the second connecting portion may have different shapes.

[0042] Another aspect of the present invention is The present invention provides a coil component comprising a main body, a coil disposed within the main body and including a turn-forming section, a first lead frame connected to the first end within the main body and extending to the outside of the main body, and a second lead frame connected to the second end within the main body and extending to the outside of the main body, wherein at least one of the first and second ends is disposed inside the turn-forming section.

[0043] In one embodiment, the first and second ends of the coil may be positioned inside the turn-forming portion.

[0044] In one embodiment, the first end of the coil may be positioned inside the turn-forming portion, and the second end of the coil may be positioned outside the turn-forming portion. [Effects of the Invention]

[0045] In the case of a coil component according to an example of the present invention, structural stability can be increased and magnetic properties can be improved. [Brief explanation of the drawing]

[0046] [Figure 1] This is a schematic transparent perspective view of a coil component according to one embodiment of the present invention. [Figure 2] This is a cross-sectional view of a region of the coil component shown in Figure 1. [Figure 3] Figure 1 is a plan view of the coil component seen from one direction. [Figure 4] Figure 1 is a plan view of the coil component from a different direction. [Figure 5] This is a plan view of a coil component according to another embodiment, seen from one direction. [Figure 6] Figure 5 is a plan view of the coil component seen from a different direction. [Figure 7] This is a plan view of a coil component according to another embodiment, seen from one direction. [Figure 8] Figure 7 is a plan view of the coil component seen from a different direction. [Figure 9]This is a plan view of a coil component according to another embodiment, seen from one direction. [Figure 10] Figure 9 is a plan view of the coil component seen from a different direction. [Figure 11] This is a plan view of a coil component according to another embodiment, seen from one direction. [Figure 12] This is a plan view of a coil component according to another embodiment, seen from one direction. [Figure 13] This is a plan view of a coil component according to another embodiment, seen from one direction. [Figure 14] This is a plan view of a coil component according to another embodiment, seen from one direction. [Modes for carrying out the invention]

[0047] Embodiments of the present invention will be described below with reference to specific embodiments and accompanying drawings. However, embodiments of the present invention can be modified into several other forms, and the scope of the present invention is not limited to the embodiments described below. Furthermore, embodiments of the present invention are provided to give a more complete explanation of the present invention to a person of the ordinary skill. Accordingly, the shapes and sizes of elements in the drawings may be enlarged or reduced (or highlighted or simplified) for a clearer explanation, and elements indicated by the same reference numerals in the drawings are the same elements.

[0048] Electronic devices utilize various types of electronic components, and various types of coil components can be appropriately used between these components for purposes such as noise reduction. In other words, coil components in electronic devices can be used as power inductors, HF inductors, general beads, GHz beads, common mode filters, and so on.

[0049] Figure 1 is a schematic transparent perspective view of a coil component according to one embodiment of the present invention. Figure 2 is a cross-sectional view of one region of the coil component in Figure 1. Figure 3 is a plan view of the coil component in Figure 1 viewed from one direction (from bottom to top with reference to Figure 1), and Figure 4 is a plan view of the coil component in Figure 1 viewed from a different direction (from top to bottom with reference to Figure 1). Referring to Figures 1 to 4, the coil component 100 according to this embodiment includes a main body 110, a coil 120, a first lead frame 130, and a second lead frame 140, wherein at least one of the first lead frame 130 and the second lead frame 140 has a structure in which at least a portion of the part located within the main body 110 overlaps with at least a portion of the turn-forming portion 121 of the coil 120 in a first direction D1 corresponding to the winding axis direction. This overlapping structure of the lead frames 130, 140 and the coil 120 reduces the pressure acting on the coil 120 and the lead frames 130, 140 during the molding process of the main body 110, thereby improving the structural stability of the coil component 100. Furthermore, the size and number of turns can be effectively increased in the turn-forming section 121 of the coil 120, and parts of the lead frames 130, 140 can also form turns, thus improving the magnetic properties of the coil component 100, such as Ls characteristics. A detailed explanation of this will be given later, and the main elements constituting the coil component 100 of this embodiment will be described below. In the drawings, the first direction D1 corresponds to the winding axis direction of the turn-forming section 121, the second direction D2 is defined as the direction perpendicular to the first direction D1, and the third direction D3 is defined as the direction perpendicular to both the first direction D1 and the second direction D2.

[0050] The main body 110 contains the coil 120 and the like, forming the overall appearance of the coil component 100. In this case, the main body 110 includes a first surface S1 and a second surface S2 facing the first direction D1, which correspond to the top and bottom surfaces of the main body 110, respectively, with reference to Figure 1. The main body 110 can also include a plurality of sides connecting the first surface S1 and the second surface S2. Here, the plurality of sides can include a third surface S3 and a fourth surface S4 facing the second direction D2, and a fifth surface S5 and a sixth surface S6 facing the third direction D3. The main body 110 can include an insulating resin and a magnetic material. Specifically, the main body 110 can be formed by laminating one or more magnetic composite sheets in which the magnetic material is dispersed in an insulating resin. As a specific example, the insulating resin and magnetic material can be embodied in a mold form, the coil 120 and lead frames 130 and 140 can be placed therein, and then the main body 110 can be formed by curing or other methods.

[0051] The magnetic material that may be contained in the main body 110 may be ferrite or metallic magnetic powder. The ferrite may be at least one of the following, for example, spinel-type ferrites such as Mg-Zn, Mn-Zn, Mn-Mg, Cu-Zn, Mg-Mn-Sr, and Ni-Zn; hexagonal-type ferrites such as Ba-Zn, Ba-Mg, Ba-Ni, Ba-Co, and Ba-Ni-Co; garnet-type ferrites such as Y-type; and Li-type ferrites. The metallic magnetic powder may contain one or more selected from the group consisting of iron (Fe), silicon (Si), chromium (Cr), cobalt (Co), molybdenum (Mo), aluminum (Al), niobium (Nb), copper (Cu), and nickel (Ni). For example, the metallic magnetic powder may be at least one of the following: pure iron powder, Fe-Si alloy powder, Fe-Si-Al alloy powder, Fe-Ni alloy powder, Fe-Ni-Mo alloy powder, Fe-Ni-Mo-Cu alloy powder, Fe-Co alloy powder, Fe-Ni-Co alloy powder, Fe-Cr alloy powder, Fe-Cr-Si alloy powder, Fe-Si-Cu-Nb alloy powder, Fe-Ni-Cr alloy powder, or Fe-Cr-Al alloy powder. The metallic magnetic powder may be amorphous or crystalline. For example, the metallic magnetic powder may be an amorphous Fe-Si-B-Cr alloy powder, but is not necessarily limited to this. The ferrite and metallic magnetic powder may each have an average diameter of approximately 0.1 μm to 30 μm, but is not limited to this. The main body 110 may contain two or more magnetic materials dispersed in the resin. Here, "different types of magnetic materials" means that the magnetic materials dispersed in the resin are distinguishable from each other by any one of the following: average diameter, composition, crystallinity, or shape. The insulating resin may contain, but is not limited to, epoxy, polyimide, liquid crystal polymer, etc., either alone or in combination.

[0052] The coil 120 is positioned within the main body 110 and can exhibit the characteristics of the coil component 100. For example, when the coil component 100 according to this embodiment is used as a power inductor, the coil 120 can stabilize the power supply of electronic equipment by storing the electric field in a magnetic field and maintaining the output voltage. The coil 120 includes a turn-forming section 121, which can form at least one turn around the winding axis in a first direction D1. As shown in the illustrated configuration, the turn-forming section 121 may be wound in an overall circular or elliptical shape, and may be located between the first end 121A and the second end 121B of the coil 120 and connected to the first end 121A and the second end 121B. The first end 121A and the second end 121B of the coil 120 are connected to the first lead frame 130 and the second lead frame 140, respectively, within the main body 110. As a specific example, the first end 121A and the second end 121B can be joined to the first lead frame 130 and the second lead frame 140, respectively, by welding or the like, and for stable connection as shown in the illustrated configuration, the first end 121A and the second end 121B can be wider or thicker than the turn-forming portion 121. The coil 120 may be an air-core coil, or it may be composed of a metal wire with a circular cross-section. Alternatively, the cross-section of the coil 120 can be deformed into a rectangle or the like. The coil 120 may be formed by winding a conductive metal, and the remaining portion, excluding the part in contact with the lead frames 130 and 140, may be coated with an insulating coating layer. Specifically, the coil 120 can be formed by spirally winding a metal wire, such as a copper wire, which includes a metal wire and an insulating coating layer covering the surface of the metal wire.

[0053] The first lead frame 130 is connected to the first end 121A of the coil 120 within the body 110 and extends outside the body 110. Similarly, the second lead frame 140 is connected to the second end 121B of the coil 120 within the body 110 and extends outside the body 110. With this structure, the first lead frame 130 and the second lead frame 140 can serve as external electrodes for the coil component 100. In this case, the first lead frame 130 and the second lead frame 140 can be arranged in a second direction D2 while extending from the first surface S1 of the body 110, and can be positioned on the third surface S3 and the fourth surface S4 of the body 110, respectively. The first lead frame 130 may include a first connecting portion 131 connected to the first end 121A and a first lead portion 132 extending from the first connecting portion 131 to the outside of the body 110. Furthermore, the second lead frame 140 may include a second connecting portion 141 connected to the second end portion 121B, and a second lead portion 142 extending from the second connecting portion 141 to the outside of the main body 110. In this case, the first lead portion 132 and the second lead portion 142 may extend to the first surface S1 of the main body 110, and more specifically, may be bent to the first surface S1 of the main body 110. The first lead frame 130 and the second lead frame 140 may contain metals such as Ag, Ag-Pd, Ni, and Cu, and selective Ni plating layers and Sn plating layers may be formed on the surfaces of the first lead frame 130 and the second lead frame 140.

[0054] As described above, at least one of the first lead frame 130 and the second lead frame 140 has at least a portion of its part located within the main body 110 that overlaps with at least a portion of the turn-forming portion 121 of the coil 120 in the first direction D1. In this embodiment, the structure is shown in which both the first lead frame 130 and the second lead frame 140 overlap with at least a portion of the turn-forming portion 121; however, it is also possible for only one of the first lead frame 130 and the second lead frame 140 to overlap with at least a portion of the turn-forming portion 121. When the lead frames 130 and 140 overlap with the turn-forming portion 121, the influence of pressure acting on the coil 120 and the lead frames 130 and 140, for example, pressure acting in the first direction D1, can be reduced during the molding process of the main body 110. If the lead frames 130 and 140 and the turn-forming portion 121 do not overlap, pressure may be applied to the coil 120 and the lead frames 130 and 140 during the molding process, causing deformation. Furthermore, the packing density of magnetic particles in the main body 110 may change significantly in the peripheral regions of the lead frames 130 and 140. However, by overlapping the lead frames 130 and 140 with the coil 120, such imbalances in packing density can be reduced. Additionally, when the lead frames 130 and 140 and the turn-forming portion 121 overlap, the size and number of turns in the turn-forming portion 121 of the coil 120 can be effectively increased, and furthermore, parts of the lead frames 130 and 140 can also form turns, thus improving the magnetic properties of the coil component 100, such as Ls characteristics.

[0055] In addition to expanding on such overlapping structures, at least one of the first end 121A and second end 121B of the coil 120 can overlap with at least a portion of the turn-forming portion 121 in the first direction D1. In this embodiment, the structure is shown in which all of the first end 121A and second end 121B of the coil 120 overlap with at least a portion of the turn-forming portion 121 in the first direction D1, but it is also possible for only one of the first end 121A and second end 121B of the coil 120 to overlap with the turn-forming portion 121.

[0056] The first lead frame 130 and the second lead frame 140 are suitable for overlapping with the turn-forming portion 121 and can also have a structure suitable for forming part of a turn within the magnetic component 100. Specifically, the first connecting portion 131 of the first lead frame 130 can overlap with at least a portion of the turn-forming portion 121 in the first direction D1, while the first lead portion 132 does not have to overlap with the turn-forming portion 121 in the first direction D1. Similarly, the second connecting portion 141 of the second lead frame 140 can overlap with at least a portion of the turn-forming portion 121 in the first direction D1, while the second lead portion 142 does not have to overlap with the turn-forming portion 121 in the first direction D1.

[0057] As shown in the illustrated configuration, the first connecting portion 131 of the first lead frame 130 may include a curved surface, and the turn-forming portion 121 may also include a curved surface. Specifically, the side surfaces of the first connecting portion 131 and the turn-forming portion 121 may each include a curved surface. In this case, the first connecting portion 131 and the turn-forming portion 121 may have substantially the same curvature. Similarly, the second connecting portion 141 of the second lead frame 140 may include a curved surface, and specifically, the side surfaces of the second connecting portion 141 may include a curved surface. In this case, the second connecting portion 141 and the turn-forming portion 121 may have substantially the same curvature. This can be adapted by forming turns in the first connecting portion 131 and the second connecting portion 141 such that they have substantially the same curvature as the turn-forming portion 121, thereby forming additional turns in the first connecting portion 131 and the second connecting portion 141.

[0058] As a more specific example, the first connecting portion 131 may have a shape that maintains the turn of the turn-forming portion 121. Here, maintaining the turn of the turn-forming portion 121 can mean that the turn connected from the second end 121B to the first end 121A is also continuously connected in the turn-forming portion 121. Similarly, the second connecting portion 141 may have a shape that maintains the turn of the turn-forming portion 121, specifically that the turn connected from the first end 121A to the second end 121B can be continuously connected in the turn-forming portion 121. In the case of additional turns that can be formed by the first connecting portion 131 in this way, they may be between 1 / 4 turn and 1 / 2 turn, and similarly, in the case of additional turns that can be formed by the second connecting portion 131, they may be between 1 / 4 turn and 1 / 2 turn. As in this embodiment, when the first connecting portion 131 and the second connecting portion 141 maintain the turn of the turn forming portion 121, the core area of ​​the turn forming portion 121 can be effectively increased, and the pressure on the coil 120 and lead frames 130 and 140 during the molding process of the main body 110 can be minimized. However, when the first connecting portion 131 and the second connecting portion 141 maintain the turn of the turn forming portion 121, this does not mean that the first connecting portion 131 and the second connecting portion 141 have substantially the same curvature as the turn forming portion 121. It can also include structures that continuously connect the turns of the turn forming portion 121 as a whole, such as the embodiments in Figures 13 and 14, as long as the turn forming portion 121 does not move in the opposite direction to the turn direction.

[0059] When the lead frames 130 and 140 and the turn-forming portion 120 overlap over a wide area, the configuration can be adapted to obtain the intended effect in this embodiment. However, the degree of overlap can be determined by considering the intended design method and characteristics such as inductance. For example, using the area of ​​a plane projected in the first direction D1 as a reference, the first connecting portion 131 can overlap with the turn-forming portion 121 by an area of ​​1 / 4 or more. More specifically, using the area of ​​a plane projected in the first direction D1 as a reference, the first connecting portion 131 can overlap with the turn-forming portion 121 by an area of ​​1 / 2 or more, and more specifically, by an area of ​​3 / 4 or more. Similarly, using the area of ​​a plane projected in the first direction D1 as a reference, the second connecting portion 141 can overlap with the turn-forming portion 121 by an area of ​​1 / 4 or more. More specifically, using the area of ​​the plane projected in the first direction D1 as a reference, the second connecting portion 141 can overlap with the turn forming portion 121 by at least half, and more specifically, at least three-quarters, of its area.

[0060] To examine the configuration of the coil 120 and lead frames 130 and 140 in more detail, as shown in Figures 1 and 2, the first end 121A and the second end 121B of the coil 120 can be positioned adjacent to the first surface S1 of the main body 110. In this case, the first lead portion 132 and the second lead portion 142 can extend to the first surface S1 of the main body 110, thereby reducing the electrical resistance by reducing the path between the lead frames 130 and 140 and the coil 120. Regarding the configuration in which the coil 120 is wound, the second end 121B can be positioned closer to the center or winding axis of the turn-forming portion 121 than the first end 121A. Furthermore, the turn-forming portion 121 can form turns from the first end 121A and the second end 121B in the direction of the second surface S2 of the main body 110. Furthermore, the first end portion 121A can be connected at the first connecting portion 131 to the surface of the main body 110 facing the first surface S1, and the second end portion 121B can be connected at the second connecting portion 141 to the surface of the main body 110 facing the first surface S1.

[0061] Next, referring to Figures 5 to 12, we will describe the coil components in the modified examples, focusing on the specific forms of the coil 120 and lead frames 130 and 140. Although some structural and functional aspects may be modified from the basic embodiment described above, the structural stability and magnetic properties of the coil component 100 can still be improved in the modified embodiment.

[0062] First, Figures 5 and 6 are plan views of coil components according to other embodiments, viewed from opposite directions, with Figure 5 corresponding to Figure 3 and Figure 6 to Figure 4. In the embodiments of Figures 5 and 6, unlike the previous embodiments, at least one of the first end 121A and second end 121B of the coil 120 is structured so as not to overlap with the turn-forming portion 121 in the first direction D1. In Figures 5 and 6, the first end 121A and second end 121B of the coil 120 are shown in a configuration that does not overlap with the turn-forming portion 121 in the first direction D1. However, in other cases, one of the first end 121A and second end 12 of the coil 120 may overlap with the turn-forming portion 121 in the first direction D1, while the other does not overlap with the turn-forming portion 121 in the first direction D1. As shown in the illustrated configuration, the first end 121A and second end 121B may be arranged inside the turn-forming portion 121. As in this embodiment, when the first end 121A and the second end 121B are arranged inside the turn forming section 121, the core area of ​​the turn forming section 121 may be slightly reduced, but the process for joining the coil 120 and the lead frames 130 and 140 (e.g., welding) can be performed efficiently.

[0063] Next, Figures 7 and 8 are plan views of coil components according to other embodiments, viewed from opposite directions, with Figure 7 corresponding to Figure 3 and Figure 8 to Figure 4. In the embodiments of Figures 7 and 8, the first end 121A may be located inside the turn-forming portion 121, and the second end 121B may be located outside the turn-forming portion 121. As shown in the configurations with such arrangements, the first connecting portion 131 and the second connecting portion 141 may have different shapes. With such an arrangement, bending of the coil 120 can be minimized, thereby streamlining the manufacturing process of the coil 120 and improving the electrical characteristics of the coil 120.

[0064] Next, Figures 9 and 10 are plan views of coil components according to other embodiments, viewed from opposite directions, with Figure 9 corresponding to Figure 3 and Figure 10 to Figure 4. In the embodiments of Figures 9 and 10, the first end 121A and the second end 121B may be located outside the turn-forming section 121. When the first end 121A and the second end 121B are located outside the turn-forming section 121, as in this embodiment, the process of joining the coil 120 and the lead frames 130 and 140 (e.g., welding) can be efficiently performed while maximizing the core area of ​​the turn-forming section 121.

[0065] Figure 11 is a plan view of a coil component according to another embodiment, viewed from one direction, and corresponds to Figure 4. In the embodiment of Figure 11, the line widths of the first connecting portion 131 and the second connecting portion 141 can be wider than the line width of the turn forming portion 121. As a specific example, the line widths of the first connecting portion 131 and the second connecting portion 141 may be twice or more the line width of the turn forming portion 121. Figure 11 shows the case where the line widths of the first connecting portion 131 and the second connecting portion 141 are twice the line width of the turn forming portion 121, but the line widths of the first connecting portion 131 and the second connecting portion 141 may be three or four times the line width of the turn forming portion 121, or even five times or more. The line width of the first connecting portion 131, the second connecting portion 141, and the turn forming portion 121 may be the line width measured in the third direction D3 of each turn in the first connecting portion 131, the second connecting portion 141, and the turn forming portion 121, based on an optical microscope image or SEM image of the cross section in the second direction D2-third direction D3 taken from the center of the first direction D1 of the coil 120, or it may mean the average value of the measured values ​​in at least three or more regions.

[0066] Figure 12 is a plan view of a coil component according to another embodiment, viewed from one direction, and corresponds to Figure 4. In the embodiment of Figure 12, the first end 121A and the second end 121B of the coil 120 can be positioned close to the corner where the fourth surface S4 and the fifth surface S5 of the main body 110 meet. In this case, the first connecting portion 121A and the second connecting portion 121B may have different shapes. By having the coil 120 and the connecting portions 121A and 121B have the structure as in this embodiment, the coil 120 and the connecting portions 121A and 121B can form a unidirectional turn overall, minimizing unnecessary turns.

[0067] In the embodiments described above, the coil 120 and the connecting portions 121A and 121B have curvature based on the shape of the plane projected in the first direction D1 and are bent shapes, but the embodiments are not limited to such shapes. Figures 13 and 14 are plan views of coil components according to other embodiments, viewed from one direction, and correspond to Figure 4. First, as in the embodiment of Figure 13, at least one of the first connecting portion 131 and the second connecting portion 141 may be rectangular in shape based on the shape of the plane projected in the first direction D1. Figure 13 shows an example where all of the first connecting portion 131 and the second connecting portion 141 have a rectangular shape when projected in the first direction D1, but only one of them may be rectangular. In this case, as in the embodiment of Figure 14, the turn-forming portion 121 may form a rectangular turn based on the shape of the plane projected in the first direction D1.

[0068] The present invention is not limited by the embodiments described above and the accompanying drawings, but is limited by the claims provided. Therefore, various forms of substitution, modification, and alteration are possible by persons with ordinary skill in the art, without departing from the technical idea of ​​the invention as described in the claims, and these also fall within the scope of the present invention. [Explanation of symbols]

[0069] 100 coil components 110 Main Unit 120 coils 121 Turn forming section 121A, 121B end 130, 140 lead frames 131, 141 Connection part 132, 142 Drawer section

Claims

1. The main unit and A coil, including a turn-forming section, is disposed within the main body, The first end of the coil is connected to the main body and a first lead frame extending to the outside of the main body, The coil's second end is connected to the main body and includes a second lead frame that extends outside the main body, When the winding axis direction of the turn-forming portion is the first direction, at least one of the first lead frame and the second lead frame is a coil component in which at least a portion of the part arranged within the main body overlaps with at least a portion of the turn-forming portion in the first direction.

2. The coil component according to claim 1, wherein at least one of the first end and second end of the coil overlaps with at least a portion of the turn-forming portion in the first direction.

3. The first lead frame includes a first connecting portion connected to the first end of the coil, and a first lead portion extending from the first connecting portion to the outside of the main body. The coil component according to claim 1, wherein the second lead frame includes a second connecting portion connected to the second end of the coil and a second lead portion extending from the second connecting portion to the outside of the main body.

4. The coil component according to claim 3, wherein the first connecting portion overlaps with at least a part of the turn forming portion in the first direction.

5. The coil component according to claim 4, wherein the first draw-out portion does not overlap with the turn-forming portion in the first direction.

6. The coil component according to claim 4, wherein the second connecting portion overlaps with at least a part of the turn forming portion in the first direction.

7. The coil component according to claim 6, wherein the second draw-out portion does not overlap with the turn-forming portion in the first direction.

8. The coil component according to any one of claims 3 to 7, wherein the first connecting portion and the turn forming portion include a curved surface.

9. The coil component according to claim 8, wherein the first connecting portion and the turn forming portion have substantially the same curvature.

10. The coil component according to claim 8, wherein the second connecting portion includes a curved surface.

11. The coil component according to claim 10, wherein the second connecting portion and the turn forming portion have substantially the same curvature.

12. The coil component according to claim 3, wherein the first connecting portion has a shape that maintains the turn of the turn-forming portion.

13. The coil component according to claim 12, wherein the second connecting portion has a shape that maintains the turn of the turn-forming portion.

14. The coil component according to claim 3, wherein, with respect to the area of ​​the plane projected in the first direction, the area of ​​the first connecting portion overlaps with the turn forming portion by 1 / 4 or more of its area.

15. The coil component according to claim 14, wherein, with respect to the area of ​​the plane projected in the first direction, the area of ​​the first connecting portion overlaps with the turn forming portion by 1 / 2 or more of its area.

16. The coil component according to claim 14, wherein, with respect to the area of ​​the plane projected in the first direction, the area of ​​the second connecting portion overlaps with the turn forming portion by 1 / 4 or more of its area.

17. The coil component according to claim 16, wherein, with respect to the area of ​​the plane projected in the first direction, the area of ​​the second connecting portion overlaps with the turn forming portion by 1 / 2 or more of its area.

18. The main body includes a first surface and a second surface facing the first direction, The coil component according to claim 3, wherein the first end and the second end are arranged adjacent to the first surface of the main body.

19. The coil component according to claim 18, wherein the first and second drawer portions extend to the first surface of the main body.

20. The coil component according to claim 18, wherein the second end of the coil is positioned closer to the center of the turn-forming portion than the first end of the coil.

21. The coil component according to claim 20, wherein the turn-forming portion forms turns from the first end and the second end of the coil, respectively, in the direction of the second surface of the main body.

22. The coil component according to claim 18, wherein the first end of the coil is connected at the first connecting portion to a surface facing the first surface of the main body.

23. The coil component according to claim 22, wherein the second end of the coil is connected at the second connecting portion to a surface facing the first surface of the main body.

24. The coil component according to claim 3, wherein at least one of the first end and the second end of the coil does not overlap with the turn-forming portion in the first direction.

25. The coil component according to claim 24, wherein the first and second ends of the coil are arranged inside the turn-forming portion.

26. The coil component according to claim 24, wherein the first end of the coil is located outside the turn-forming portion, and the second end of the coil is located inside the turn-forming portion.

27. The coil component according to any one of claims 24 to 26, wherein the first connecting portion and the second connecting portion have different shapes from each other.

28. The coil component according to claim 24, wherein the first and second ends of the coil are arranged outside the turn-forming portion.

29. The coil component according to claim 3, wherein the wire width of the first connecting portion and the second connecting portion is wider than the wire width of the turn forming portion.

30. The coil component according to claim 29, wherein the wire width of the first connecting portion and the second connecting portion is at least twice the wire width of the turn forming portion.

31. The coil component according to claim 3, wherein at least one of the first connecting portion and the second connecting portion is rectangular in shape with respect to the planar shape projected in the first direction.

32. The coil component according to claim 31, wherein the turn-forming portion forms a rectangular turn based on the shape of a plane projected in the first direction.

33. The main unit and A coil, including a turn-forming section, is disposed within the main body, The first end of the coil is connected to the main body and a first lead frame extending to the outside of the main body, The coil's second end is connected to the main body and includes a second lead frame that extends outside the main body, The first lead frame includes a first connecting portion connected to the first end of the coil, and a first lead portion extending from the first connecting portion to the outside of the main body. The second lead frame includes a second connecting portion connected to the second end of the coil, and a second lead portion extending from the second connecting portion to the outside of the main body. The first connecting portion is a coil component having a shape that maintains the turn of the turn-forming portion.

34. The coil component according to claim 33, wherein the second connecting portion has a shape that maintains the turn of the turn-forming portion.

35. The main body includes a first and second surface facing a first direction, a third and fourth surface facing a second direction perpendicular to the first direction, and a fifth and sixth surface facing a third direction perpendicular to the first and second directions. The coil component according to claim 33, wherein the first lead frame and the second lead frame are arranged in the second direction while extending to the first surface of the main body.

36. The coil component according to claim 35, wherein the first and second ends of the coil are positioned close to the corner where the fourth and fifth surfaces of the main body meet.

37. The coil component according to claim 36, wherein the first connecting portion and the second connecting portion have different shapes from each other.

38. The main unit and A coil, including a turn-forming section, is disposed within the main body, The first end of the coil is connected to the main body and a first lead frame extending to the outside of the main body, The coil's second end is connected to the main body and includes a second lead frame that extends outside the main body, A coil component in which at least one of the first and second ends of the coil is positioned inside the turn-forming portion.

39. The coil component according to claim 38, wherein the first and second ends of the coil are arranged inside the turn-forming portion.

40. The coil component according to claim 38 or 39, wherein the first end of the coil is positioned inside the turn-forming portion, and the second end of the coil is positioned outside the turn-forming portion.

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