Winding Structure and Manufacturing Method for Inductor, Winding Inductor and Manufacturing Method

Abstract

A winding structure for an inductor, a manufacturing method thereof, a winding inductor, and a manufacturing method thereof. The winding structure includes a magnetic core and a coil. The magnetic core includes a middle column, blades, first to fourth wire hanging portions, and first to second bosses. The middle column is connected to the top surface of the blade. The first boss is provided in the middle of the first side of the blade and extends outward. The second boss is provided in the middle of the second side of the blade and extends outward. The surfaces where the first to fourth wire hanging portions respectively transition to the bottom surface of the blade are the first to fourth chamfered surfaces. The coil includes a wire package sleeved on the middle column and two wire tails. The first to fourth segments of the first wire tail are successively attached to the first wire hanging portion and the first chamfered surface, the bottom surface of the blade, the third chamfered surface and the third wire hanging portion, and the top surface of the blade. The first to fourth segments of the second wire tail are successively attached to the second wire hanging portion and the second chamfered surface, the bottom surface of the blade, the fourth chamfered surface and the fourth wire hanging portion, and the top surface of the blade. The second segments of the two wire tails are parallel to each other.

Description

Technical Field

[0001] The present invention relates to an electronic component, and particularly to a winding structure for an inductor, a manufacturing method thereof, a wound inductor, and a manufacturing method thereof. Background Art

[0002] As a basic electronic component, there are currently various types of inductors. The demand for electronic components in the information field is increasing, and the requirements for the electrical and mechanical properties of inductors are also getting higher and higher. This requires a corresponding stable structure as a support. How to optimize its structure is a direction that those skilled in the art need to study. In the prior art, there is a lack of a winding for an inductor with high reliability and stable structure. Summary of the Invention

[0003] To make up for the deficiencies of the prior art, the present invention provides a winding structure for an inductor, a manufacturing method thereof, a wound inductor, and a manufacturing method thereof.

[0004] The present invention adopts the following technical solutions:

[0005] A winding structure for an inductor includes: a magnetic core and a coil; the magnetic core includes a central column, a blade, first to fourth wire-hanging portions, and first to second bosses. The central column is connected to the top surface of the blade and extends upward. The first boss is provided in the middle of the first side of the blade and extends outward. The second boss is provided in the middle of the second side of the blade and extends outward. The first side and the second side are opposite to each other. The side surfaces of the first side of the blade on both sides of the first boss are respectively used as the first wire-hanging portion and the second wire-hanging portion. The side surfaces of the second side of the blade on both sides of the second boss are respectively used as the third wire-hanging portion and the fourth wire-hanging portion. The surfaces where the first to fourth wire-hanging portions respectively transition to the bottom surface of the blade are first to fourth chamfered surfaces. The coil includes a wire coil and a first wire tail and a second wire tail respectively extending from both ends of the wire coil. The wire coil is sleeved on the central column. The first section of the first wire tail is attached to the first wire-hanging portion and the first chamfered surface, the second section is attached to the bottom surface of the blade, the third section is attached to the third wire-hanging portion and the third chamfered surface, and the fourth section is buckled on the top surface of the blade. The first section of the second wire tail is attached to the second wire-hanging portion and the second chamfered surface, the second section is attached to the bottom surface of the blade, the third section is attached to the fourth wire-hanging portion and the fourth chamfered surface, and the fourth section is buckled on the top surface of the blade. The second sections of the first wire tail and the second wire tail are parallel to each other.

[0006] Preferably, the first to fourth wire-hanging portions are all vertical planes, the first to fourth chamfered surfaces are all inclined planes, the vertical plane and the inclined plane form an outwardly convex V shape, the vertical plane is perpendicular to the top surface of the blade, and the inclined plane slopes from the bottom edge of the vertical plane towards the bottom surface of the blade.

[0007] Preferably, the inclination angle of the inclined plane is between 30° and 45°.

[0008] Preferably, the gaps between the second segments of the first wire tail and the second wire tail and the bottom surface of the blade are both 0 - 0.1 mm; the wire thickness of the wire tail is such that the wire tail attached to the wire-hanging portion does not exceed the outer edges of the first boss and the second boss; the length of each wire-hanging portion and each chamfered surface is greater than the width of the two wire tails.

[0009] Preferably, the magnetic core is an integrally formed structure.

[0010] A winding inductor having the winding structure described above.

[0011] A method for manufacturing the winding structure described above, comprising the following steps:

[0012] (1) Press the wire package sleeved on the middle column tightly.

[0013] (2) Starting from the top surface of the blade, bend the first wire tail downward for the first time so that the first segment of the first wire tail fits against the first wire-hanging portion and the first chamfered surface, then bend it to the right for the second time so that the second segment of the first wire tail fits against the bottom surface of the blade, then bend it upward for the third time so that the third segment of the first wire tail fits against the third wire-hanging portion and the third chamfered surface, and finally, bend it to the left for the fourth time so that the fourth segment of the first wire tail is buckled against the top surface of the blade.

[0014] (3) Starting from the top surface of the blade, bend the second wire tail downward for the first time so that the first segment of the second wire tail fits against the second wire-hanging portion and the second chamfered surface, then bend it to the right for the second time so that the second segment of the second wire tail fits against the bottom surface of the blade, then bend it upward for the third time so that the third segment of the second wire tail fits against the fourth wire-hanging portion and the fourth chamfered surface, and finally, bend it to the left for the fourth time so that the fourth segment of the second wire tail is buckled against the top surface of the blade.

[0015] Preferably, the method further includes the following steps: cutting the first wire tail and the second wire tail so that the fourth segments of the two wire tails buckled on the top surface of the blade after the fourth bending maintain a safe distance from each other and the wire package, wherein the cutting is performed before the first bending, after the first bending, after the second bending, or after the third bending.

[0016] Preferably, the angle of each bending in steps (1) and (2) is 80-90°.

[0017] Preferably, the parts of the first wire tail and the second wire tail on the bottom surface of the blade are metallized or pre-metallized respectively.

[0018] A manufacturing method of a winding inductor, which forms the winding structure obtained by the manufacturing method of the winding structure described above into a winding inductor.

[0019] The beneficial effects of the present invention include: the two wire tails of the winding structure of the present invention are buckled on the top surface of the blade after four bends respectively, and the transition surface between the wire hanging part on the side surface of the blade and the bottom surface of the blade is a chamfered surface, which can reduce the gap between the second segments of the two wire tails and the bottom surface of the blade during the second bending. Thus, the formed winding structure is stable, the size of the formed inductor is stable, and the wire package and the wire tail are closely attached to the magnetic core, with good winding consistency. The electrical consistency of the formed inductor will also be optimized accordingly, reducing the risk of open circuit and short circuit. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the magnetic core 1 in the embodiment of the present invention.

[0021] Figure 2 It is a schematic side view of the allowable structure of the blade of the magnetic core 1 in the embodiment of the present invention during actual molding.

[0022] Figure 3 It is a schematic structural diagram of the coil 2 in the embodiment of the present invention.

[0023] Figure 4 It is a schematic diagram of the assembly and compaction of the coil and the magnetic core in the embodiment of the present invention.

[0024] Figure 5 It is a schematic diagram of the first bending of the first wire tail 22 in the embodiment of the present invention.

[0025] Figure 6 It is a schematic diagram of the second bending of the first wire tail 22 in the embodiment of the present invention.

[0026] Figure 7 It is a schematic diagram of the third bending of the first wire tail 22 in the embodiment of the present invention.

[0027] Figure 8 It is a schematic diagram of the fourth bending of the first wire tail 22 in the embodiment of the present invention.

[0028] Figure 9 It is a schematic diagram of a single winding structure in the embodiment of the present invention.

[0029] Figure 10 It is a schematic diagram of a winding structure row in the embodiment of the present invention. Detailed implementation manners

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] It should be noted that the orientation terms such as left, right, up, down, top, bottom, etc. in this article are only relative concepts to each other, and are referenced based on the orientation shown in the drawings, and should not be considered restrictive.

[0032] Although the present invention uses terms such as first, second, third, etc. to describe various components, it should be understood that these components should not be limited by such terms. Such terms are only used to distinguish one component from another or for easy description and understanding, and do not themselves represent any previous ordinal number of the component described, nor the arrangement order of one component and another component, or the order in the manufacturing method. Therefore, without departing from the scope of the specific embodiments of the present invention, the first component discussed below can also be represented by terms such as the second component.

[0033] In this article, when referring to the "wire hanging part" and there is no limitation by the first, second, third, or fourth in front of the wire hanging part, the wire hanging part refers to each of the first wire hanging part, the second wire hanging part, the third wire hanging part, and the fourth wire hanging part; when referring to the "chamfered surface" and there is no limitation by the first, second, third, or fourth in front of the chamfered surface, the chamfered surface refers to each of the first chamfered surface, the second chamfered surface, the third chamfered surface, and the fourth chamfered surface; when referring to the "wire tail" and there is no limitation by the first or second in front of the wire tail, the wire tail refers to each of the first wire tail and the second wire tail.

[0034] Such as Figure 1-10As shown, in a specific embodiment, a winding structure for an inductor includes a magnetic core 1 and a coil 2. The magnetic core 1 includes a central column 11, a blade 12 (the blade 12 can also be referred to as a page pendulum), a first wire-hanging portion 13-1, a second wire-hanging portion 13-2, a third wire-hanging portion 13-3, a fourth wire-hanging portion 13-4, a first boss 15-1, and a second boss 15-2. The central column 11 is connected to the top surface of the blade 12 and extends upward. The first boss 15-1 is provided in the middle of the first side of the blade 12 and extends outward. The second boss 15-2 is provided in the middle of the second side of the blade 12 and extends outward. The first side and the second side are opposite sides. The side surfaces on both sides of the first boss 15-1 on the first side of the blade 12 are respectively used as the first wire-hanging portion 13-1 and the second wire-hanging portion 13-2, and the side surfaces on both sides of the second boss 15-2 on the second side of the blade are respectively used as the third wire-hanging portion 13-3 and the fourth wire-hanging portion 13-4. That is, the first wire-hanging portion 13-1 and the second wire-hanging portion 13-2 are symmetrically located on both sides of the first boss 15-1, and the third wire-hanging portion 13-3 and the fourth wire-hanging portion 13-4 are also symmetrically located on both sides of the second boss 15-2; the surfaces where the first to fourth wire-hanging portions respectively transition to the bottom surface of the blade are the first to fourth chamfered surfaces. The coil 2 includes a wire package 21 and a first wire tail 22 and a second wire tail 23 respectively extending from both ends of the wire package 21. The wire package 21 is sleeved on the central column 11; the first section of the first wire tail 22 fits against the first wire-hanging portion and the first chamfered surface, the second section fits against the bottom surface of the blade, the third section fits against the third wire-hanging portion and the third chamfered surface, and the fourth section is buckled on the top surface of the blade; the first section of the second wire tail fits against the second wire-hanging portion and the second chamfered surface symmetrically to the first section of the first wire tail, the second section fits against the bottom surface of the blade symmetrically to the second section of the first wire tail and is parallel to it, the third section fits against the fourth wire-hanging portion and the fourth chamfered surface symmetrically to the fourth section of the first wire tail, and the fourth section is buckled on the top surface of the blade symmetrically to the fourth section of the first wire tail and is parallel to it.

[0035] The first to fourth chamfered surfaces are arc-shaped curved surfaces or inclined planes. Preferably, as Figure 1 shown, the first to fourth wire-hanging portions all have the following same structure: the wire-hanging portion is a vertical plane, and the first to fourth chamfered surfaces all have the following same structure: the chamfered surface is an inclined plane. The vertical plane and the inclined plane form an outwardly convex V shape. The vertical plane is perpendicular to the top surface of the blade, and the inclined plane slopes from the bottom edge of the vertical plane towards the bottom surface of the blade. The inclination angle of the inclined plane is between 30 - 45°. Taking Figure 1 as an example ( Figure 1 only shows the first chamfered surface 14-1), the first wire-hanging portion 13-1 is a vertical plane perpendicular to the top surface of the blade 12. The lengths of the first wire-hanging portion 13-1 and the first chamfered surface 14-1 are equal and both are greater than the widths of the two wire tails (as Figure 9 shown, the length L is greater than the width l of the wire tail). The inclined plane slopes from the bottom edge of the vertical plane towards the bottom surface of the blade (that is, asFigure 1 As shown, the top edge b of the first chamfered surface 14-1 and the bottom edge b of the first wire-hanging part 13-1 are the same edge. However, in the actual molding process, as Figure 2 shown, a certain distance (preferably not exceeding 0.1 mm) is allowed between the top edge of the first chamfered surface 14-1 and the bottom edge of the first wire-hanging part 13-1, and the inclination angle α of the first chamfered surface 14-1 is between 30° and 45°.

[0036] The magnetic core is an integrally formed structure and can be made of different materials such as ferrite, FeNi, etc. The shape of the middle column can be a racetrack shape, a circular shape, a spiral shape, etc. The top surfaces of the first boss and the second boss are flush with the top surface of the blade, and the bottom surfaces of the first boss and the second boss are also flush with the bottom surface of the blade. As Figure 1 shown in the example, both the first boss and the second boss are trapezoidal structures, but it is not limited to this structure. The wire thickness of the wire tail makes the wire tail attached to the wire-hanging part not exceed the outer edges of the first boss and the second boss, that is, as Figure 9 shown, d is greater than 0. The magnetic core can be a T-shaped or other special-shaped magnetic core, etc. In the example of this article, the magnetic core is T-shaped.

[0037] The coil is a hollow coil, and the hollow part is sleeved on the middle column, and the wire package does not exceed the blade. The coil can be wound with round wire or flat wire. The coil can be processed and formed separately and then sleeved on the middle column, or can be directly wound on the middle column to form a coil. The winding method can be opposing winding, vertical winding, overlapping winding, etc.

[0038] There is a safety distance between the end of the fourth section of the first wire tail and the wire package, so that there is no interference between the first wire tail and the wire package. Correspondingly, there is also a safety distance between the end of the fourth section of the second wire tail and the wire package, so that there is no interference between the second wire tail and the wire package.

[0039] In the above specific embodiment, the wire tail is buckled on the top surface of the blade after being bent four times. The chamfered surface and the fourth bending cooperate to reduce the gap between the second section of the wire tail after the second bending and the bottom surface of the blade. In the formed winding structure, the magnetic core and the coil form an integral structure, and the wire tail is not easy to shift and deform, ensuring the parallelism, winding coplanarity and winding height of the electrode (that is, the second section of the wire tail is metallized to be used as the electrode of the inductor). The formed inductor has stable dimensions, the wire package and the wire tail are closely attached to the magnetic core, the winding consistency is good, and the electrical consistency of the formed inductor will necessarily be optimized accordingly, reducing the risk of open circuit and short circuit.

[0040] In some embodiments, the second section of the first wire tail and the second section of the second wire tail will be metallized to be used as electrodes.

[0041] In some embodiments, the gaps between the second segments of the first wire tail and the second wire tail and the bottom surface of the blade are both 0 - 0.1 mm.

[0042] In some embodiments, the chamfer of each chamfered surface matches the thickness of the wire tail to ensure the flatness of the wire tail during the second bending, so that the second segment of the wire tail closely adheres to the bottom surface of the blade, ensuring that the gap between the second segment of the wire tail and the bottom surface of the blade is as small as possible. For example, when the wire thickness is less than 0.15 mm, a chamfer of C0.05 can be used; when the wire thickness is between 0.15 mm and 2 mm, a chamfer of C0.1 can be used.

[0043] The embodiment of the present invention also provides a method for manufacturing a winding structure, including the following steps:

[0044] (1) Compress the wire coil sleeved on the middle column. As Figure 4 shown, a prefabricated sleeve 3 can be used to sleeve the middle column and compact the wire coil, so that the wire coil closely adheres to the upper surface of the blade and prevents the wire coil from rebounding. The prefabricated sleeve 3 always compacts the wire coil during the subsequent winding forming process.

[0045] (2) Start from the top surface of the blade 12 and make the first bend downward (as Figure 5 shown) for the first wire tail 22, so that the first segment of the first wire tail adheres to the first wire hanging portion and the first chamfered surface, then make the second bend to the right so that the second segment of the first wire tail adheres to the bottom surface of the blade (as Figure 6 shown), then, make the third bend upward (as Figure 7 shown) so that the third segment of the first wire tail adheres to the third wire hanging portion and the third chamfered surface, and finally, make the fourth bend to the left so that the fourth segment of the first wire tail buckles to the top surface of the blade (as Figure 8 shown);

[0046] (3) Start from the top surface of the blade 12 and make the first bend downward for the second wire tail 23, so that the first segment of the second wire tail adheres to the second wire hanging portion and the second chamfered surface, then make the second bend to the right so that the second segment of the second wire tail adheres to the bottom surface of the blade, then, make the third bend upward so that the third segment of the second wire tail adheres to the fourth wire hanging portion and the fourth chamfered surface, and finally, make the fourth bend to the left so that the fourth segment of the second wire tail buckles to the top surface of the blade.

[0047] Preferably, after the first bend, the first wire tail and the second wire tail can be introduced into the positioning groove for fixing the wire tail of the equipment fixture for bending treatment, so that the distance between the first wire tail and the second wire tail is fixed during the subsequent bending process (mainly the second bending process), which plays a role in strengthening the stability of the electrode size.

[0048] Among them, the order of steps (2) and (3) is not restricted. They can be carried out simultaneously, or separately without a specific order. After all the bends at the two wire ends are completed, the prefabricated sleeve 3 is removed.

[0049] Taking the first wire end 22 as an example, after four bends, four segments are formed, as Figure 8 shown, which are the first segment 22-1, the second segment 22-2, the third segment 22-3, and the fourth segment 22-4 respectively. Similarly and symmetrically, after four bends, the first wire end also forms four segments. That is, the first segment of the first wire end and the first segment of the second wire end symmetrically adhere to the wire hanging parts and chamfered surfaces on both sides of the first boss. The second segment of the first wire end and the second segment of the second wire end symmetrically adhere to the bottom surface of the blade and are parallel to each other. The third segment of the first wire end and the third segment of the second wire end symmetrically adhere to the wire hanging parts and chamfered surfaces on both sides of the second boss. The fourth segment of the first wire end and the fourth segment of the second wire end symmetrically adhere to the top surface of the blade near the second side and are parallel to each other.

[0050] In some preferred embodiments, the manufacturing method further includes the following steps: cutting the first wire end and the second wire end so that the ends of the wire ends (i.e., the fourth segments of the two wire ends) that are buckled on the top surface of the blade after the fourth bend maintain a safe distance from the wire package without interference. Among them, the cutting can be carried out before the first bend, after the first bend, after the second bend, or after the third bend. Cutting is not always necessary. Only when the wire ends may interfere with the wire package after the fourth bend, it is necessary to cut the wire ends.

[0051] In some preferred embodiments, the angle of each bend in steps (1) and (2) is 80-90°, and more preferably, the angle of each bend is 90°. For example, from the Figure 3-Figure 8 orientation in, the first bend is vertically downward, the second bend is horizontally to the right, the third bend is vertically upward, and the fourth bend is horizontally to the left.

[0052] In some preferred embodiments, the manufacturing method further includes the following steps: metallizing or pre-metallizing the parts of the first wire end and the second wire end on the bottom surface of the blade (i.e., the second segments of the two wire ends) respectively after the winding structure is manufactured, as the electrodes of the inductor.

[0053] The manufacturing method of the specific embodiment of the present invention can form a single winding structure, as Figure 9 shown, or can form a row of winding structures arranged by a single winding structure in a predetermined arrangement, as Figure 10 shown. When forming a row of winding structures, it can be that individual winding structures are first manufactured separately and then arranged, or it can be that the arrangement is carried out before winding, and then the manufacturing of the winding structures is carried out simultaneously or without a specific order.

[0054] The specific implementation manner of the present invention further provides a winding inductor, which has the above-mentioned winding structure. The inductor can be a single inductor or a winding inductor row formed by arranging single inductors in a predetermined arrangement.

[0055] In the specific implementation manner of the present invention, a method for manufacturing a winding inductor is further provided. The winding structure obtained by the manufacturing method of the above-mentioned winding structure is formed into a winding inductor, and the forming method can be cold pressing, hot pressing, potting, transfer molding, etc.

[0056] As shown in Table 1 below, the comparison data of the winding structure obtained by the method of the present invention and the conventional winding structure (compared with the present invention, the blades of the magnetic core are not provided with chamfered surfaces and are not subjected to the fourth bending treatment) are shown.

[0057] Table 1: Comparison of the gap (unit: mm) between the second section of the wire tail and the bottom surface of the blade

[0058] Product serial number Conventional winding structure Winding structure of the present application 1 0.087 0.050 2 0.074 0.050 3 0.081 0.056 4 0.087 0.043 5 0.068 0.062 6 0.081 0.062 7 0.130 0.068 8 0.081 0.043 9 0.112 0.043 10 0.093 0.043 11 0.093 0.031 12 0.111 0.043 13 0.081 0.068 14 0.099 0.050 15 0.031 0.050 16 0.124 0.043 17 0.105 0.043 18 0.099 0.037 19 0.105 0.050 20 0.074 0.037 21 0.074 0.043 22 0.081 0.031 23 0.068 0.037 24 0.074 0.037 25 0.068 0.031 26 0.087 0.032 27 0.068 0.043 28 0.062 0.043 29 0.081 0.043 30 0.074 0.043 31 0.068 0.043 32 0.056 0.043 Minimum value 0.130 0.068 Maximum value 0.031 0.031 Average value 0.084 0.045

[0059] As shown in Table 2 below, the comparison data of the winding inductor of the present invention and the conventional winding inductor (compared with the present invention, the blades of the magnetic core of the conventional winding inductor are not provided with chamfered surfaces and are not subjected to the fourth bending treatment) are shown.

[0060] Table 2: Comparison of inductance (unit: μH)

[0061] Product serial number Conventional winding inductance Winding inductance of the present invention 1 1.39 1.481 2 1.48 1.454 3 1.35 1.502 4 1.406 1.456 5 1.425 1.463 6 1.427 1.453 7 1.438 1.473 8 1.467 1.511 9 1.451 1.435 10 1.458 1.476 11 1.45 1.464 12 1.445 1.476 13 1.413 1.417 14 1.422 1.487 15 1.465 1.459 16 1.382 1.457 17 1.473 1.465 18 1.406 1.434 19 1.465 1.475 20 1.406 1.484 21 1.391 1.467 22 1.354 1.460 23 1.391 1.473 24 1.42 1.508 25 1.344 1.462 26 1.414 1.459 27 1.395 1.492 28 1.43 1.486 29 1.438 1.458 30 1.439 1.452 31 1.461 1.474 32 1.327 1.422 Minimum value 1.327 1.511 Maximum value 1.480 1.417 Average value 1.419 1.467

[0062] As can be seen from Table 2 above, taking the inductance specification of 1.5 ± 20% μH as an example, the process capability index Cpk of the inductance of the conventional winding inductor is 1.84, while the process capability index Cpk of the inductance of the winding inductor of the present application is 4.03, indicating that the manufacturing process of the present application is relatively stable, and a winding inductor with higher electrical precision and better consistency can be obtained. Therefore, compared with the conventional winding structure, the winding structure of the present invention has higher structural stability, can ensure high consistency of the electrical properties and dimensions of the manufactured inductor, and reduce the risk of open circuit and short circuit.

[0063] The above content is a further detailed description of the present invention in combination with specific preferred implementation manners, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those skilled in the technical field to which the present invention belongs, without departing from the concept of the present invention, several equivalent substitutions or obvious modifications can be made, and as long as the performance or use is the same, it should be regarded as belonging to the protection scope of the present invention.

Claims

1. A winding structure for an inductor, characterized in that, Comprising: A magnetic core and a coil; The magnetic core includes a central column, blades, first to fourth wire-hanging portions, and first to second bosses. The central column is connected to the top surface of the blade and extends upward. The first boss is provided in the middle of the first side of the blade and extends outward. The second boss is provided in the middle of the second side of the blade and extends outward. The first side and the second side are opposite to each other. The side surfaces on both sides of the first boss on the first side of the blade are respectively used as the first wire-hanging portion and the second wire-hanging portion. The side surfaces on both sides of the second boss on the second side of the blade are respectively used as the third wire-hanging portion and the fourth wire-hanging portion; The surfaces where the first to fourth wire-hanging portions respectively transition to the bottom surface of the blade are first to fourth chamfered surfaces; The coil includes a wire coil and a first wire tail and a second wire tail respectively extending from both ends of the wire coil. The wire coil is sleeved on the central column; The first section of the first wire tail is attached to the first wire-hanging portion and the first chamfered surface, the second section is attached to the bottom surface of the blade, the third section is attached to the third wire-hanging portion and the third chamfered surface, and the fourth section is buckled to the top surface of the blade; The first section of the second wire tail is attached to the second wire-hanging portion and the second chamfered surface, the second section is attached to the bottom surface of the blade, the third section is attached to the fourth wire-hanging portion and the fourth chamfered surface, and the fourth section is buckled to the top surface of the blade. The second sections of the first wire tail and the second wire tail are parallel to each other.

2. The winding structure according to claim 1, characterized in that The first to fourth wire-hanging portions are all vertical planes, the first to fourth chamfered surfaces are all inclined planes, the vertical plane and the inclined plane form an outwardly convex V shape. The vertical plane is perpendicular to the top surface of the blade, and the inclined plane inclines from the bottom edge of the vertical plane towards the bottom surface of the blade.

3. The winding structure according to claim 2, wherein The inclination angle of the inclined plane is between 30 - 45°.

4. The winding structure according to claim 1, characterized in that The gaps between the second sections of the first wire tail and the second wire tail and the bottom surface of the blade are both 0 - 0.1 mm; the wire thickness of the wire tail is such that the wire tail attached to the wire-hanging portion does not exceed the outer edges of the first boss and the second boss; the length of each wire-hanging portion and each chamfered surface is greater than the width of the two wire tails.

5. The winding structure according to claim 1, characterized in that, The magnetic core is an integrally formed structure.

6. A winding inductance, characterized in that: It has the winding structure described in claim 1.

7. A manufacturing method of the winding structure according to claim 1, characterized in that, Including the following steps: (1) Press the wire coil sleeved on the central column; (2) Starting from the top surface of the blade, bend the first wire tail downward for the first time so that the first section of the first wire tail is attached to the first wire-hanging portion and the first chamfered surface, then bend it to the right for the second time so that the second section of the first wire tail is attached to the bottom surface of the blade, then bend it upward for the third time so that the third section of the first wire tail is attached to the third wire-hanging portion and the third chamfered surface, and finally bend it to the left for the fourth time so that the fourth section of the first wire tail is buckled to the top surface of the blade; (3) Start from the top surface of the blade and make the first bend downward for the second wire tail, so that the first section of the second wire tail fits against the second wire hanging portion and the second chamfered surface, then make the second bend to the right so that the second section of the second wire tail fits against the bottom surface of the blade, then make the third bend upward so that the third section of the second wire tail fits against the fourth wire hanging portion and the fourth chamfered surface, and finally make the fourth bend to the left so that the fourth section of the second wire tail is buckled to the top surface of the blade.

8. The manufacturing method according to claim 7, characterized in that It further includes the following steps: cut the first wire tail and the second wire tail so that the fourth sections of the two wire tails buckled to the top surface of the blade after the fourth bend and the wire bundle all maintain a safe distance without interfering with each other, wherein the cutting is performed before the first bend, after the first bend, after the second bend or after the third bend.

9. The manufacturing method according to claim 7, characterized in that, The angle of each bend in steps (1) and (2) is 80-90°.

10. The manufacturing method according to claim 7, wherein It further includes the following steps: metallize or pre-metallize the portions of the first wire tail and the second wire tail on the bottom surface of the blade respectively.

11. A manufacturing method of a winding inductor, characterized in that, The winding structure produced by the manufacturing method of the winding structure according to claim 7 is formed into a winding inductor.

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