Coil assembly

Abstract

This disclosure provides a coil assembly. The coil assembly includes: a body having a first and second surface opposite to each other in a first direction, a third and fourth surface opposite to each other in a second direction, and a fifth and sixth surface opposite to each other in a third direction, the body comprising a magnetic material; a coil including a winding portion disposed in the body and leads extending to the first and second surfaces of the body; and a lead frame including an anchor portion at least partially disposed in the body, the lead frame being disposed on the first and second surfaces of the body and connected to the leads. The anchor portion may include at least one blade having a shape that twists about a third direction as an axis while projecting along the third direction.

Description

[0001] This application claims the benefit of priority to Korean Patent Application No. 10-2024-0188475, filed on December 17, 2024, with the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0002] This disclosure relates to a coil assembly. Background Technology

[0003] An inductor (a type of coil assembly) can be a representative passive electronic component used in electronic devices along with resistors and capacitors.

[0004] Recently, the market for high-current power inductors used in artificial intelligence (AI), automotive electronic components, and robotics has been growing, especially given the increasing current and voltage used in electronic devices, highlighting the importance of inductor efficiency.

[0005] Medium to large-sized power inductors mainly consist of a magnetic material body, a coil, and a lead frame. When the magnetic material body is being formed, high voltage may cause the coil and lead frame to shift or misalign, resulting in deterioration of the inductor's performance and defects. Summary of the Invention

[0006] One aspect of this disclosure is to provide a coil assembly capable of preventing defects caused by coil offset and misalignment.

[0007] According to one aspect of this disclosure, a coil assembly is provided, the coil assembly comprising: a body having a first and a second surface opposed to each other in a first direction, a third and a fourth surface opposed to each other in a second direction, and a fifth and a sixth surface opposed to each other in a third direction, the body comprising a magnetic material; a coil including a winding portion disposed in the body and leads extending to the first and second surfaces of the body; and a lead frame including an anchor portion at least partially disposed in the body, the lead frame being disposed on the first and second surfaces of the body and connected to the leads. The anchor portion may include at least one blade having a shape that projects along the third direction while twisting about the third direction as an axis.

[0008] According to another aspect of this disclosure, a coil assembly is provided, the coil assembly comprising: a body having a first surface and a second surface opposite to each other in a first direction, a third surface and a fourth surface opposite to each other in a second direction, and a fifth surface and a sixth surface opposite to each other in a third direction, the body comprising a magnetic material; a coil including a winding portion disposed in the body and leads extending to the first surface and the second surface of the body; and a lead frame including an anchor portion at least partially disposed in the body, the lead frame being disposed on the first surface and the second surface of the body and connected to the leads. The anchor portion may have the first surface and the second surface opposite in the third direction. A first blade may be disposed on the first surface of the anchor portion, and a third blade may be disposed on the second surface of the anchor portion, the first blade and the third blade protruding along the third direction.

[0009] According to exemplary embodiments of this disclosure, the coil assembly can prevent defects caused by coil displacement and misalignment. Attached Figure Description

[0010] The above and other aspects, features and advantages of this disclosure will become clearer from the following detailed embodiments, taken in conjunction with the accompanying drawings, in which: Figure 1 This is a perspective view of a coil assembly according to an exemplary embodiment of the present disclosure; Figure 2 yes Figure 1 A side view of the coil assembly according to an example embodiment; Figure 3 yes Figure 1 A top view of the coil assembly according to an example embodiment; Figure 4 This is an exploded view of a coil assembly according to an exemplary embodiment of the present disclosure; Figure 5 This is a perspective view of a first lead frame according to an exemplary embodiment of the present disclosure; Figure 6 This is a perspective view of a coil assembly according to a variant of this disclosure; and Figure 7 This is a perspective view of the first lead frame according to a variant of this disclosure. Detailed Implementation

[0011] The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to limit the example embodiments. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. As used herein, the term "and / or" includes any one and any combination of any two or more of the associated listed items. It will be further understood that the terms "comprising" and / or "including" specify the presence of the stated features, quantities, steps, operations, elements, components, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, steps, operations, elements, components, and / or combinations thereof. Additionally, the terms "set on," "located on," etc., may mean that an element is located on or below the target portion, and do not necessarily mean that the element is located on the upper side of the target portion relative to the direction of gravity.

[0012] The terms “integrated into” and “connected to” can refer not only to elements that are in direct and physical contact with each other, but also to a structure in which another element is located between the elements, causing the elements to come into contact with each other.

[0013] The dimensions and thicknesses of each element shown in the accompanying drawings are arbitrarily depicted for ease of description, but this disclosure is not limited to the dimensions and thicknesses shown herein.

[0014] In the accompanying drawings, the X direction can be defined as a first direction or a length direction, the Y direction can be defined as a second direction or a width direction, and the Z direction can be defined as a third direction or a thickness direction.

[0015] In the following description, a coil assembly according to an exemplary embodiment of the present disclosure will be described in detail with reference to the accompanying drawings. In the description with reference to the drawings, the same or corresponding elements are indicated by the same reference numerals, and repeated descriptions thereof will be omitted.

[0016] Various types of electronic components can be used in electronic devices, and various types of coil components can be appropriately used among such electronic components to remove noise.

[0017] In other words, in electronic devices, coil assemblies can be used as power inductors, high-frequency inductors, ordinary ferrite beads, high-frequency ferrite beads (such as ferrite beads suitable for the GHz band), common-mode filters, etc.

[0018] Figure 1 This is a perspective view of a coil assembly according to an exemplary embodiment of the present disclosure. Figure 2 yes Figure 1 The side view of the coil assembly according to the example embodiment is shown. Figure 3 yes Figure 1 The top view of the coil assembly according to the example embodiment is shown. Figure 4 This is an exploded view of a coil assembly according to an exemplary embodiment of the present disclosure. Figure 5 This is a perspective view of a first lead frame according to an exemplary embodiment of the present disclosure.

[0019] Reference Figure 1 According to an example embodiment of the present disclosure, a coil assembly 1000 may include: a body 100 comprising a magnetic material; a coil 300 disposed in the body 100; and lead frames 400 and 500 disposed on a first surface and a second surface of the body 100.

[0020] The body 100 may form the overall appearance of the coil assembly 1000 according to this example embodiment, and may include a coil 300 embedded in the body 100.

[0021] The main body 100 can have a hexahedral shape. (Refer to...) Figure 1 The main body 100 may include a first surface 101 and a second surface 102 opposite to each other in a first direction (X direction), a third surface 103 and a fourth surface 104 opposite to each other in a second direction (Y direction), and a fifth surface 105 and a sixth surface 106 opposite to each other in a third direction (Z direction). The first surface 101, the second surface 102, the third surface 103, and the fourth surface 104 of the main body 100 may correspond to a plurality of side surfaces of the main body 100 that connect the fifth surface 105 and the sixth surface 106 to each other.

[0022] The coil assembly 1000 according to this exemplary embodiment, having lead frames 400 and 500 which will be described below, may have a length and width of 4.0 mm, a length and width of 5.0 mm, a length and width of 6.0 mm and a width of 6.0 mm, or a length and width of 13.0 mm, but this disclosure is not limited thereto. The above dimensions of the coil assembly 1000 are merely exemplary, and cases in which the coil assembly 1000 has dimensions other than those described above are not excluded from the scope of this disclosure.

[0023] The body 100 may include a magnetic material. The body 100 can be formed by filling a mold with a magnetic material, or by filling a mold with a composite material comprising a magnetic material and an insulating resin. A molding process involving applying high temperature and high pressure to the magnetic material or composite material in the mold may also be performed, but this disclosure is not limited thereto.

[0024] The magnetic material included in the body 100 may be, for example, ferrite particles or magnetic metal particles.

[0025] The ferrite particles can be, for example, spinel-type ferrite particles (such as Mg-Zn-based ferrite particles, Mn-Zn-based ferrite particles, Mn-Mg-based ferrite particles, Cu-Zn-based ferrite particles, Mg-Mn-Sr-based ferrite particles, Ni-Zn-based ferrite particles, etc.), hexagonal ferrite particles (such as Ba-Zn-based ferrite particles, Ba-Mg-based ferrite particles, Ba-Ni-based ferrite particles, Ba-Co-based ferrite particles, Ba-Ni-Co-based ferrite particles, etc.), garnet-type ferrite particles (such as Y-based ferrite particles, etc.), and Li-based ferrite particles.

[0026] Magnetic metal particles may include 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, magnetic metal particles may be at least one selected from pure iron particles, Fe-Si based alloy particles, Fe-Si-Al based alloy particles, Fe-Ni based alloy particles, Fe-Ni-Mo based alloy particles, Fe-Ni-Mo-Cu based alloy particles, Fe-Co based alloy particles, Fe-Ni-Co based alloy particles, Fe-Cr based alloy particles, Fe-Cr-Si based alloy particles, Fe-Si-Cu-Nb based alloy particles, Fe-Ni-Cr based alloy particles, and Fe-Cr-Al based alloy particles.

[0027] The magnetic metal particles can be amorphous or crystalline. For example, the magnetic metal particles can be Fe-Si-B-Cr based amorphous alloy particles, but this disclosure is not necessarily limited to this.

[0028] In the body 100, each of the ferrite particles and the magnetic metal particles may have an average diameter of about 0.1 μm to about 30 μm, but embodiments thereof are not limited thereto.

[0029] The body 100 may include two or more different types of magnetic materials dispersed in a resin. Here, different types of magnetic materials mean that the magnetic materials are distinguished from each other according to at least one of average diameter, composition, crystallinity, and shape. For example, the body 100 may include two or more types of magnetic particles with different particle sizes.

[0030] The insulating resin may include, alone or in combination, epoxy resin, polyimide, liquid crystal polymer, etc., but this disclosure is not limited thereto.

[0031] like Figure 4 As shown, the main body 100 may include a molding portion 110 and a cover portion 120, with a coil disposed in the molding portion 110 and the cover portion 120 disposed on the molding portion 110.

[0032] The molding portion 110 may be disposed on the lower part of the cover portion 120, and the coil 300 may be disposed in the molding portion 110. The molding portion 110 may have a surface (upper surface) opposite to the cover portion 120, another surface (lower surface) opposite to the first surface, and a plurality of side surfaces connecting the first surface and the other surface to each other. The plurality of side surfaces of the molding portion 110 may form part of a plurality of side surfaces of the body 100.

[0033] The molding section 110 may include a core C passing through the coil 300. Here, "passing through the coil 300" may refer to passing through the hollow core of the coil 300 forming at least one turn. The core C may be disposed in the internal region of the coil 300 forming at least one turn, and may have a circular cross-section or an elliptical cross-section.

[0034] A cover portion 120 may be disposed on the upper surface (one surface) of the molding portion 110 to cover the coil 300. After the cover portion 120 is disposed on the molding portion 110 and the coil 300, the cover portion 120 may be press-fitted to the molding portion 110. The cover portion 120 may have one surface (lower surface) opposite to the molding portion 110, another surface (upper surface) opposite to said one surface, and a plurality of side surfaces connecting said one surface and said other surface to each other. The plurality of side surfaces of the cover portion 120 may, together with the plurality of side surfaces of the molding portion 110, form a plurality of side surfaces of the body 100.

[0035] Coil 300 may be disposed in body 100 to exhibit the properties of coil assembly 1000. For example, when coil assembly 1000 according to this example embodiment is used as a power inductor, coil 300 may be used to stabilize the power of electronic device by storing electric field as magnetic field to maintain output voltage.

[0036] The coil 300 may include: a winding portion 310 forming at least one turn around the core C; and leads 331 and 332 connected to the lead frame described below.

[0037] Reference Figures 1 to 3 The winding portion 310 can be wound around the core C to form multiple turns. The winding portion 310 can be configured to be parallel to the sixth surface 106 of the body 100, and the winding axis of the winding portion 310 can be configured to be parallel to the third direction (Z direction).

[0038] The winding portion 310 can be wound in a circular or elliptical shape, and the core C can be located at the center of the winding portion 310.

[0039] The first lead 331 and the second lead 332 can be connected to both ends of the winding portion 310, and can be connected to the first lead frame 400 and the second lead frame 500 respectively.

[0040] Coil 300 may be an air-core coil and may include a metal wire MW with a circular cross-section or a metal wire with a rectangular cross-section, or coil 300 may be constructed as a rectangular coil having an overall rectangular shape, but this disclosure is not limited thereto.

[0041] The coil 300 can be formed by winding a metal wire, and the portion of the coil 300 that does not contact the lead frames 400 and 500, which will be described below, can be coated with an insulating film. Specifically, the coil 300 can be formed by spirally winding a metal wire MW (such as copper wire (Cu wire)) comprising a metal wire and an insulating film coated on the surface of the metal wire.

[0042] Reference Figures 1 to 3 The lead frames 400 and 500 may be disposed on the first surface 101 and the second surface 102 of the body 100, and according to this example embodiment, may be used as the external electrodes of the coil assembly 1000.

[0043] The lead frames 400 and 500 may include a first lead frame 400 disposed on a first surface 101 and a sixth surface 106 of the body 100, and a second lead frame 500 disposed on a second surface 102 and a sixth surface 106 of the body 100. The first lead frame 400 may be connected to a first lead 331, and the second lead frame 500 may be connected to a second lead 332.

[0044] The first lead frame 400 may include: an anchoring portion 410, which is at least partially disposed in the body 100; a connecting portion 420, which is disposed on a first surface 101 of the body 100; and an extension portion 430, which is disposed on a sixth surface 106 of the body 100.

[0045] Anchoring portion 410 may be at least partially disposed in body 100 and may be used to improve the adhesive strength between first lead frame 400 and body 100. Anchoring portion 410 may have one surface (e.g., a first surface) opposite a fifth surface 105 of body 100 and another surface (e.g., a second surface) opposite a sixth surface 106 of body 100. (See reference...) Figure 2 The one surface of the anchoring part 410 may refer to the upper surface of the anchoring part 410, and the other surface of the anchoring part 410 may refer to the lower surface of the anchoring part 410.

[0046] The anchoring portion 410 may include one end 411 (e.g., a first end) and another end 412 (e.g., a second end) spaced apart from each other in a second direction (Y direction). The first end 411 and the other end 412 may be spaced apart from each other in the second direction (Y direction) such that the anchoring portion 410 may have a Y-shape (e.g., ...). Figure 3(As shown in the diagram). The coil 300 can be coupled between one end 411 and the other end 412 of the anchoring portion 410. The anchoring portion 410 can extend together with the coil 300 to the first surface 101 of the body 100 and can be connected to the connecting portion 420, which will be described below.

[0047] Reference Figure 5 The anchoring portion 410 may include at least one blade having a shape that twists about a third direction (Z direction) as an axis while projecting along a third direction. Twisting about the third direction means that the portion of the blade that contacts the anchoring portion 410 (hereinafter referred to as the first portion) remains stationary, while the remaining portion twists relative to the first portion by a predetermined angle.

[0048] Figure 4 This is an exploded view of a coil assembly according to an exemplary embodiment of the present disclosure. In cases where the coil and lead frame are welded together, the body 100 may undergo a master molding process in which the body is re-formed under high molding pressure when the molding portion 110 and the cover portion 120 are inserted and master molding pressure is applied. In this case, due to the high molding pressure, misalignment and displacement of the coil and lead frame may occur, which could lead to deterioration of inductive properties and defects. The blades of the lead frame can act as supports during the pressurization process used to form the body, such that the lead frame of the coil assembly according to this exemplary embodiment can prevent misalignment and displacement of the coil and lead frame.

[0049] The blade can be a helical protrusion provided on the anchoring portion 410. The blade can be formed by bending a portion of the end of the anchoring portion 410 in a third direction (Z direction). When bent, said portion of the blade can twist about the third direction, which is the axis, in a clockwise (or counterclockwise) direction. As described above, the surface area of ​​the blade can be increased due to the helical shape, thereby improving the support strength of the lead frame. The end of the blade can have a triangular structure, so that the blade can maintain its helical structure during the high-pressure pressing process without being compressed by magnetic particles.

[0050] A blade may be disposed at each of one end 411 and the other end 412 of the anchoring portion 410. The blade may be disposed at the end of the anchoring portion 410 and may not contact the coil 300. When viewed along a third direction, the blade may not overlap with the coil 300. One end 411 of the anchoring portion 410 (e.g., the first end) may include a first blade B1, and the other end 412 of the anchoring portion 410 (e.g., the second end) may include a second blade B2. The first blade B1 and the second blade B2 may be formed in different directions on different edges at their respective ends. (Refer to...) Figure 5A first blade B1 may be formed on the side of one end 411, and a second blade B2 may be formed on the front of the other end 412. Therefore, the first blade B1 may be formed such that it is not opposite to the second blade B2 in the second direction (Y direction), that is, the first blade B1 and the second blade B2 face different directions. For example, the first blade B1 may have a first end portion (e.g., a first edge) located on one end (i.e., the first end) 411 of the anchoring portion 410, and the second blade B2 may have a second end portion (e.g., a second edge) located on the other end (i.e., the second end) 412 of the anchoring portion 410. The first longitudinal axis of the first end portion (i.e., the extending direction of the first edge) and the second longitudinal axis of the second end portion (i.e., the extending direction of the second edge) may be set relative to each other at a predetermined angle, wherein the predetermined angle may be greater than 0 degrees and less than 180 degrees. Figure 5 The diagram illustrates the case where the predetermined angle is 90 degrees. The first blade B1 and the second blade B2 can have shapes that bend in different directions, thereby improving the support strength of the lead frame. Furthermore, the first blade B1 can have a shape that twists a quarter turn (i.e., twists 90 degrees) around a third direction serving as its axis, and the second blade B2 can also have a shape that twists a quarter turn (i.e., twists 90 degrees) around a third direction serving as its axis, so that the twisted first blade B1 and the second blade B2 still face different directions.

[0051] Specifically, each of the first blade B1 and the second blade B2 may have a flat plate shape in its initial state, and may include a first portion that is in contact with and fixed to the anchoring portion 410, a second portion that deforms due to torsion, and a third portion that changes direction only due to torsion and does not deform. According to a preferred embodiment of this disclosure, such as Figure 5 As shown, each of the first blade B1 and the second blade B2 can be twisted 90 degrees, and the third part can have a triangular plate shape.

[0052] In addition, although Figure 5 The first blade B1 and the second blade B2 are shown to have a shape that is rotated counterclockwise by a quarter turn around a third direction as an axis. However, this disclosure is not limited to this. The first blade B1 and the second blade B2 may also have a shape that is rotated clockwise by a quarter turn around a third direction as an axis. Alternatively, one of the first blade B1 and the second blade B2 may have a shape that is rotated counterclockwise by a quarter turn around a third direction as an axis, and the other of the first blade B1 and the second blade B2 may have a shape that is rotated clockwise by a quarter turn around a third direction as an axis.

[0053] The blade may be disposed on one surface (upper surface) of the anchoring part 410. The blade disposed on the upper surface of the anchoring part 410 may be referred to as the upper blade (e.g., the first blade).

[0054] Reference Figure 4 According to this example embodiment, the blade can contact the cover portion 120 of the body 100. The blade can be bent in the direction along which pressure is applied by a mold or the like during the molding of the body 100, and can contact the cover portion 120.

[0055] A connecting portion 420 may be disposed on a first surface 101 of the main body 100. An extension portion 430 may be disposed on a sixth surface 106 of the main body 100. A first lead frame 400 may extend to a side surface of the main body 100 via the connecting portion 420 and the extension portion 430, and may be bent toward a lower surface of the main body 100 (i.e., the sixth surface 106). A first lead 331 may be disposed on the outer surface of the connecting portion 420 and the extension portion 430, thereby extending to the lower surface of the coil assembly. That is, the first lead 331 may extend to the first surface 101 of the main body 100, and may further extend to the sixth surface 106 of the main body 100.

[0056] The second lead frame 500 may include: an anchoring portion 510, which is at least partially disposed in the body 100; a connecting portion 520, which is disposed on the second surface 102 of the body 100; and an extension portion 530, which is disposed on the sixth surface 106 of the body 100.

[0057] Anchoring portion 510 may be at least partially disposed in body 100 and may be used to improve the adhesive strength between second lead frame 500 and body 100. Anchoring portion 510 may have one surface opposite to fifth surface 105 of body 100 and another surface opposite to sixth surface 106 of body 100. (Refer to...) Figure 2 The one surface of the anchoring part 510 may be referred to as the upper surface of the anchoring part 510, and the other surface of the anchoring part 510 may be referred to as the lower surface of the anchoring part 510.

[0058] The anchoring portion 510 may include one end 511 and another end 512 spaced apart from each other in a second direction (Y direction). The one end 511 and the other end 512 may be spaced apart from each other in the second direction (Y direction), such that the anchoring portion 510 may have a Y-shape (e.g., Figure 3 (As shown in the diagram). The coil 300 can be coupled between one end 511 and the other end 512 of the anchoring portion 510. The anchoring portion 510 can extend together with the coil 300 to the second surface 102 of the body 100 and can be connected to the connecting portion 520, which will be described below.

[0059] With reference Figure 5 Similar to the described anchoring part 410, the anchoring part 510 may also include at least one blade having a shape that twists about a third direction as an axis while protruding along a third direction (Z direction).

[0060] The description of the blades is the same as that of the first lead frame 400 above, so a detailed description will be omitted.

[0061] A connecting portion 520 may be disposed on the second surface 102 of the main body 100. An extension portion 530 may be disposed on the sixth surface 106 of the main body 100. The second lead frame 500 may extend to the side surface of the main body 100 via the connecting portion 520 and the extension portion 530, and may be bent toward the lower surface of the main body 100 (i.e., the sixth surface 106). The extension portion 530 of the second lead frame 500 may be disposed on the sixth surface 106 of the main body 100, spaced apart from the extension portion 430 of the first lead frame 400. A second lead 332 may be disposed on the outer surface of the connecting portion 520 and the extension portion 530, thereby extending to the lower surface of the coil assembly. That is, the second lead 332 may extend to the second surface 102 of the main body 100, and may further extend to the sixth surface 106 of the main body 100.

[0062] Leadframes 400 and 500 may include metals such as copper (Cu), silver (Ag), palladium (Pd), and nickel (Ni). There are no limitations on the metal, as long as it is a conductive metal. Although not shown in the figures, metal layers may be formed on the inner and outer surfaces of leadframes 400 and 500. The metal layers can be used to bond leads 331 and 332 to leadframes 400 and 500 respectively, and can be formed using processes such as dipping or soldering. The metal layers may include nickel (Ni), tin (Sn), copper (Cu), etc., and may have a multilayer structure.

[0063] Figure 6 This is a perspective view of a coil assembly according to a variant of this disclosure. Figure 7 This is a perspective view of the first lead frame according to a variant of this disclosure.

[0064] Reference Figure 6 and Figure 7Lower blades (e.g., the third and fourth blades) B3 and B4 may be disposed on the other surface (lower surface) of the anchoring portion 410. Lower blades B3 and B4 may be formed toward the lower surface of the body 100 (i.e., in a direction opposite to the direction along which pressure is applied by the mold, etc., during the molding of the body 100). For example, the third blade B3 and the fourth blade B4 may protrude toward the sixth surface 106 of the body 100. Lower blades B3 and B4 may contact the molding portion 110, thereby improving the support strength of the first lead frame 400. Furthermore, the third blade B3 may have a shape that is twisted clockwise by a quarter turn (i.e., 90 degrees clockwise) about the third direction as an axis. For example, the third blade B3 may have a shape that protrudes along the third direction while twisting clockwise about the third direction as an axis. The fourth blade B4 may have a shape that is twisted clockwise by a quarter turn (i.e., 90 degrees clockwise) about the third direction as an axis. For example, the fourth blade B4 may have a shape that twists clockwise around the third direction which is the axis while protruding in the third direction.

[0065] Similarly, like the first blade B1 and the second blade B2, the lower blades B3 and B4 can also be disposed on different edges of the first end 411 and the second end 412 of the anchoring portion 410 at predetermined angles to each other. Preferably, the first blade B1 and the third blade B3 are disposed on different edges of the first end 411 of the anchoring portion 410 at predetermined angles to each other, and the second blade B2 and the fourth blade B4 are disposed on different edges of the second end 412 of the anchoring portion 410 at predetermined angles to each other. In this case, the first blade B1, the second blade B2, the third blade B3, and the fourth blade B4 can have a shape that rotates clockwise or counterclockwise by a quarter turn about a third direction (Z direction) as the axis, thereby further improving the support strength of the first lead frame 400.

[0066] Additionally, the second lead frame 500 may have the same structure as the first lead frame 400 and be arranged symmetrically (e.g., centrally symmetrically) with respect to the coil, so a description of the second lead frame 500 is omitted.

[0067] While exemplary embodiments have been shown and described above, it will be readily understood by those skilled in the art that modifications and variations may be made without departing from the scope of this disclosure as defined by the appended claims.

Claims

1. A coil assembly, comprising: The body has a first and a second surface opposite to each other in a first direction, a third and a fourth surface opposite to each other in a second direction, and a fifth and a sixth surface opposite to each other in a third direction, the body comprising a magnetic material; A coil, comprising a winding portion disposed in the body and leads extending to the first surface and the second surface of the body; as well as A lead frame, including an anchoring portion at least partially disposed in the body, the lead frame being disposed on the first surface and the second surface of the body and connected to the lead wire. The anchoring portion includes at least one blade, which has a shape that twists about a third direction that serves as an axis while protruding along the third direction.

2. The coil assembly according to claim 1, wherein, The at least one blade includes a first blade and a second blade. The anchoring portion includes a first end and a second end spaced apart from each other in the second direction, and The first end includes the first blade, and the second end includes the second blade.

3. The coil assembly according to claim 2, wherein, The first blade and the second blade are not opposite each other in the second direction.

4. The coil assembly according to claim 1, wherein, The at least one blade includes a first blade and a third blade. The anchoring portion has a first surface and a second surface that are opposite each other in the third direction, and The first blade is disposed on the first surface of the anchoring part, and the third blade is disposed on the second surface of the anchoring part.

5. The coil assembly according to claim 4, wherein, The first blade protrudes toward the fifth surface of the body, and The third blade protrudes toward the sixth surface of the body.

6. The coil assembly according to claim 4, wherein, The first blade has a shape that is twisted counterclockwise around the third direction, which is the axis, and The third blade has a shape that is twisted clockwise around the third axis.

7. The coil assembly according to claim 1, wherein, When viewed upwards along the third direction, the at least one blade is not superimposed on the coil.

8. The coil assembly according to claim 1, wherein, The main body includes a molding portion and a covering portion covering the molding portion, and The coil is disposed in the molding section.

9. The coil assembly according to claim 8, wherein, The at least one blade is in contact with the cover.

10. The coil assembly according to claim 1, wherein, The lead frame further includes: a connecting portion disposed on the first surface and the second surface of the body; and an extension portion disposed on the sixth surface of the body.

11. The coil assembly according to claim 2, wherein, The first blade has a first end portion located at the first end of the anchor portion, the second blade has a second end portion located at the second end of the anchor portion, and the first longitudinal axis of the first end portion and the second longitudinal axis of the second end portion are arranged at a predetermined angle relative to each other.

12. The coil assembly according to claim 11, wherein, The first blade has a shape that twists a quarter turn around the third direction, which is the axis, and The second blade has a shape that twists a quarter turn around the third direction as the axis.

13. The coil assembly according to claim 6, wherein, The anchoring portion includes a first end and a second end spaced apart from each other in the second direction, and the first blade and the third blade are located on different edges of the first end of the anchoring portion at predetermined angles. The first blade has a shape that rotates counterclockwise by a quarter turn around the third direction, which is the axis, and The third blade has a shape that rotates clockwise by a quarter turn around the axis of the third blade.

14. A coil assembly, comprising: The body has a first and a second surface opposite to each other in a first direction, a third and a fourth surface opposite to each other in a second direction, and a fifth and a sixth surface opposite to each other in a third direction, the body comprising a magnetic material; A coil, comprising a winding portion disposed in the body and leads extending to the first surface and the second surface of the body; as well as A lead frame, including an anchoring portion at least partially disposed in the body, the lead frame being disposed on the first surface and the second surface of the body and connected to the lead wire. The anchoring portion has a first surface and a second surface that are opposite each other in the third direction, and A first blade is provided on the first surface of the anchoring part, and a third blade is provided on the second surface of the anchoring part, with the first blade and the third blade protruding along the third direction.

15. The coil assembly of claim 14, wherein, The first blade protrudes toward the fifth surface of the body, and The third blade protrudes toward the sixth surface of the body.

16. The coil assembly of claim 14, wherein, The first blade has a shape that twists counterclockwise about the third direction, which is the axis, while projecting along the third direction. The third blade has a shape that twists clockwise around the third direction, which is the axis, while protruding along the third direction.

17. The coil assembly of claim 14, wherein, The anchoring portion includes a first end and a second end spaced apart from each other in the second direction, and The first end includes the first blade and the third blade.

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