Inductors and electronic devices

Abstract

This invention proposes an inductor and an electronic device. The inductor includes an innermost winding, a first winding structure, and a first transition section. The innermost winding has a first end and a second end spaced apart along the height direction of the inductor. The first winding structure is wound from the first end to the outside of the innermost winding and includes at least one winding layer. The first transition section is located at the end containing the second end and extends from the second end outwards along at least a portion of the circumference of the inductor to the outside of the first winding structure. The technical solution of this application can reduce the winding difficulty of the inductor and improve its vibration resistance and reliability.

Description

Technical Field

[0001] This invention relates to the field of wire-wound inductor technology, and particularly to an inductor coil and electronic device. Background Technology

[0002] Conventional inductors are formed by winding leads on a magnetic core to form a core coil, or by winding leads on a fixture and then releasing them to form an air coil. In this case, the leads are arranged layer by layer from the inside out on the magnetic core or fixture to form a multi-layer winding. Due to the limitations of the coil formation method, the initial lead end of the coil is connected to the inner winding of the coil, and the final lead end of the coil is connected to the outer winding of the coil.

[0003] To connect to pins or pads, the starting lead on the inner layer needs to cross the coil's end face to the outer layer. For air-core coils, this crossing increases the height by one wire diameter, posing a reliability risk. For magnetic core coils, avoidance slots or holes need to be cut into the magnetic core, resulting in a complex structure and increased winding difficulty. Summary of the Invention

[0004] The main objective of this invention is to provide an inductor coil and an electronic device that reduces the difficulty of winding the inductor coil and improves its vibration resistance and reliability.

[0005] To achieve the above objectives, the present invention provides an inductor coil, the inductor coil comprising:

[0006] The innermost winding has a first end and a second end spaced apart along the height direction of the inductor coil;

[0007] A first winding structure, wherein the first winding structure is wound from the first end to the outside of the innermost winding, and includes at least one winding layer; and

[0008] A first transition section is located at one end where the second end is located, and extends from the inside to the outside of the first winding structure along at least a portion of the circumference of the inductor coil from the second end.

[0009] In one embodiment of this application, the first winding structure includes at least two layers of windings arranged sequentially from the inside to the outside. Between two adjacent layers of windings, the outer winding is folded back from the end of the inner coil and wrapped around the outside of the inner coil along the height direction of the inductor coil.

[0010] In one embodiment of this application, the inductor coil further includes a second winding structure, which is wound around the outside of the first winding structure from the end of the first transition section away from the innermost winding, and is located between the outermost end of the first winding structure and the first transition section in the height direction of the inductor coil.

[0011] In one embodiment of this application, the inductor coil further includes a second transition section located on the side of the second winding structure opposite to the first transition section, and extending from the outermost end of the first winding structure along at least a portion of the circumference of the inductor coil to the outside of the second winding structure.

[0012] In one embodiment of this application, the first winding structure includes multiple layers of windings.

[0013] In one embodiment of this application, the first winding structure is provided with at least two sets, a second winding structure is sandwiched between two adjacent sets of the first winding structure, and the two adjacent sets of the first winding structure are connected by a first transition section.

[0014] And / or, the second winding structure has at least two sets, the first winding structure includes two layers of windings, and a first winding structure is sandwiched between two adjacent sets of the first winding structures and connected by a second transition section.

[0015] In one embodiment of this application, the second winding structure includes at least two layers of windings arranged from the inside to the outside. Between two adjacent layers of windings, the outer winding is folded back from the end of the inner coil and wrapped around the outside of the inner coil along the height direction of the inductor coil.

[0016] And / or, the first winding structure includes two layers of windings.

[0017] In one embodiment of this application, the first transition segment extends outward after extending half a turn at the end of each layer of the first winding structure.

[0018] In one embodiment of this application, the coils of two adjacent winding layers are staggered;

[0019] And / or, the winding directions of two adjacent layers of winding are opposite.

[0020] In one embodiment of this application, the inductor coil is an air-core coil or a magnetic core coil.

[0021] This application also proposes an electronic device comprising an inductor coil as described in any of the preceding claims.

[0022] The inductor coil of the present invention allows the lead-out end of the inner winding to extend circumferentially from the end of the inductor coil to the outer side of the inductor coil. At this time, both leads of the inductor coil are on the outer side of the coil, which improves the convenience of wiring. At the same time, the transition section at the end also has at least a partial coil structure, which can play an inductive role and can control the direction of the lead-out end from the circumference of the inductor coil. It does not require the lead-out end to extend radially from the inductor coil directly as in the conventional method, which would increase the height of the inductor coil. It also does not require the opening of clearance grooves or clearance holes in the winding part such as the magnetic core or jig, which simplifies the structural design of the inductor coil, reduces the winding difficulty of the inductor coil, and improves the vibration resistance and reliability of the inductor coil. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is a structural diagram of an embodiment of the inductor coil of the present invention;

[0025] Figure 2 for Figure 1 Another structural view of the inductor coil;

[0026] Figure 3 for Figure 1 A structural diagram showing the connection between the inductor coil and the winding section;

[0027] Figure 4 for Figure 1 Cross-sectional view of the inductor coil and winding section; winding view.

[0028] Figure 5 This is a structural diagram of the inductor coil of the present invention when it has two layers of windings;

[0029] Figure 6 This is a structural diagram of the inductor coil of the present invention when it has three layers of windings;

[0030] Figure 7 This is a winding view of another embodiment of the inductor coil of the present invention;

[0031] Figure 8 This is a winding view of another embodiment of the inductor coil of the present invention;

[0032] Figure 9 This is a winding view of another embodiment of the inductor coil of the present invention;

[0033] Figure 10 This is a winding view of another embodiment of the inductor coil of the present invention.

[0034] Explanation of icon numbers:

[0035] label name label name 100 Inductor 60 First lead-out end 10 Innermost winding 70 Second lead 20 First winding structure 200 lead 30 First transition section 210 First introduction paragraph 40 Second winding structure 220 Second introduction 50 Second transition section 300 Winding section

[0036] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0038] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0039] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0041] This invention proposes an inductor coil 100.

[0042] Please refer to Figures 1 to 6In some embodiments of the inductor coil 100 of this application, the inductor coil 100 includes:

[0043] The innermost winding 10 has a first end and a second end that are spaced apart along the height direction of the inductor coil 100.

[0044] A first winding structure 20 is wound from the first end around the outer side of the innermost winding 10, and includes at least one winding layer; and

[0045] The first transition section 30 is located at one end where the second end is located and extends from the inside to the outside of the first winding structure 20 along at least a portion of the circumference of the inductor coil 100.

[0046] The inductor coil 100 is defined to have a first end and a second end spaced apart along the height direction, and the inductor coil 100 has two leads, namely a first lead 60 and a second lead 70.

[0047] The inductor coil 100 of this application is actually formed by winding a single lead wire 200. Assuming that the lead wire 200 used to wind the inductor coil 100 has a dividing point at the midpoint between its two ends, the lead segment between the dividing point and the first lead-out end 60 is designated as the first lead-out segment 210, and the lead segment between the dividing point and the second lead-out end 70 is designated as the second lead-out segment 220. In this embodiment, the dividing point between the innermost winding 10 and the first winding structure 20 is used as the starting point of the first lead-out segment 210 and the second lead-out segment 220 to wind the inductor coil. The structure of 100 is described below. It should be noted that, in the context of this application, the starting end of the innermost winding 10, the starting end of the winding in the first winding structure 20, and the starting end of other structures such as the first transition section 30 are only assumed to be the starting end of winding when the lead wire 200 starts from the separation point between the innermost winding 10 and the first winding structure 20 and gradually forms each winding or each transition section from the inside out. It does not refer to the current input end of the winding or transition section, nor does it limit the specific formation method of the inductor coil 100.

[0048] Specifically, the inductor coil 100 of this application includes an innermost winding 10 and a first winding structure 20 arranged sequentially from the inside out. The first winding structure 20 includes at least one layer of winding, that is, the inductor coil 100 includes at least two layers of winding, each layer of winding having a spiral structure. The innermost winding 10 is defined to have a first end and a second end. Assuming that the separation point between the first lead-out section 210 and the second lead-out section 220 of the lead wire 200 is located at the first end, the first end of the innermost winding 10 is this separation point. Heating the innermost coil 10 involves winding from the first end to the second end, and the lead-out end of the innermost winding is the innermost winding 10. At the second end, a first transition section 30 is provided. The first transition section 30 extends outward from the second end of the innermost winding 10 along the circumference of the inductor coil 100 to cross the first winding structure 20. It can be understood that in this embodiment, the lead-out section of the first transition section 30 is located outside the first winding structure 20 and can form the first lead-out end 60 of the inductor coil 100. Since the first transition section 30 is located at the end of the first winding structure 20, it will not block the lead-out end of the first winding structure 20. At this time, the lead-out section of the first winding structure 20 is also located at the outermost part of the inductor coil 100 to serve as the second lead-out end 70 of the inductor coil 100. At this time, the first lead-out end 60 and the second lead-out end 70 of the inductor coil 100 are both located on the outermost side of the inductor coil 100, which improves the convenience of wiring. Moreover, the first transition section 30 does not extend directly outward along the radial direction of the inductor coil 100, but extends outward along the circumference of the inductor coil 100. It can also serve as part of the coil structure to play an inductive role. It does not require the lead-out end to extend directly from the radial direction of the inductor coil 100 in the traditional way, which would increase the height of the inductor coil 100. It also does not require the opening of clearance grooves or clearance holes in the winding part 300 of the magnetic core or fixture. The extension circumference of the first transition section 30 can be set according to the wiring position of the first lead-out end 60 to control the wire exit position of the first lead-out end 60.

[0049] Of course, since the first lead-out section 210 and the second lead-out section 220 are actually connected by a single lead wire 200, those skilled in the art, after understanding the structure of the inductor coil 100 of this application, can use any point on the lead wire 200, including the two endpoints of the first lead-out end 60 and the second lead-out end 70, as the starting point of the winding. For example, when winding to form the innermost winding 10, it can be wound from the first end to the second end, or from the second end to the first end. Therefore, the connection point between the innermost winding 10 and the first transition section 30 can also be used as the separation point between the first lead-out section 210 and the second lead-out section 220. In this case, the starting end of the innermost winding 10 is connected to the starting end of the first transition section 30, and the lead-out end of the innermost winding 10 is connected to the starting end of the first winding structure 20. It is not necessary to distinguish the first lead-out section. The first lead 210 and the second lead 220 can also be wound to form the inductor coil 100 of this application. In this embodiment, the separation point between the innermost winding 10 and the first winding structure 20 is used as the starting point of the first lead 210 and the second lead 220, which is only for the convenience of describing the winding structure of the inductor coil 100. The extension direction of the first lead 210 and the extension direction of the second lead 220 in the figure only represent the height direction or the radial direction from the inside to the outside when the first lead 210 and the second lead 220 extend spirally. For example, the first lead 210 extends from the lower end to the upper end in the height direction, which actually means that the first lead 210 extends spirally from the lower end to the upper end. Similarly, the first lead 210 extends from the inside to the outside of the winding portion 300, which also means that the first lead 210 extends spirally from the inside to the outside.

[0050] As a winding method, the separation point between the innermost winding 10 and the first winding structure 20 is used as the starting point of the first lead-out section 210 and the second lead-out section 220. The separation point of the lead 200 is located at the first end. The first lead-out section 210 extends spirally from the first end along the height direction of the inductor coil 100 to the second end to form the innermost winding 10 of the inductor coil 100. Since the position of the innermost winding 10 is occupied by the first lead-out section 210, the second lead-out section 220 extends spirally from the end of the innermost winding 10 at the first end to the second end. At this time, the second lead-out section 220 crosses the coil of the innermost winding 10 at the separation point. The second lead-out section 220 extends spirally around the innermost winding 10 to the second end to form the second layer of winding. At this time, the first lead-out end 60 is located on the innermost winding 10. At this time, the first lead-out section 210 extends spirally from the innermost winding 10 to the second end to form the second layer of winding. A first transition section 30 is formed by spiraling outward from the second end along the circumference of the inductor coil 100, so that the first lead-out end 60 naturally crosses over to the outside of the second layer of coil. The first lead-out section 210 can spiral to form a full circle, or only half a circle or other circumferences, depending on the wiring position of the first lead-out end 60. This setting avoids the problem of bending the lead wire 200 and increasing the height of the inductor coil 100 by one wire diameter when the first lead-out section 210 directly crosses the outer winding, thus improving the shock resistance and performance reliability of the inductor coil 100. In addition, when winding the coil, it is not necessary to open clearance slots or clearance holes on the winding part 300 such as the magnetic core or jig to allow the first lead-out end 60 to extend to the outside of the inductor coil 100, simplifying the structure of the inductor coil 100 and reducing the winding difficulty.

[0051] It should be noted that, based on the above structure of the inductor coil 100, when the number of winding layers of the inductor coil 100 is greater than two, the inductor coil 100 can have the following structural form and winding method;

[0052] Example 1, refer to Figures 5 to 8 The inductor coil 100 includes an innermost coil and a first winding structure 20. The lead end of the innermost coil is connected to the first transition section 30, and the other end of the innermost coil is connected to the first winding structure 20. The first winding structure 20 includes at least two layers of windings arranged sequentially from the inside to the outside.

[0053] Correspondingly, the first lead-out section 210 of the lead wire 200 can spirally extend from the first end along the height direction of the inductor coil 100 to the second end to form the innermost winding 10 of the inductor coil 100. The second lead-out section 220 spirally extends around the innermost winding 10 to the second end to form the second winding. Starting from the second winding, the second lead-out section 220 spirally extends back and forth along the height direction of the inductor coil 100 to form at least two layers of windings connected in sequence. That is, the second lead-out section 220 spirally extends from the first end around the innermost winding 10... The second lead 70 extends to the second end to form a second layer of winding, and then spirals from the second end to the first end along the height direction of the inductor coil 100 outside the first layer of winding to form a third layer of winding. This process is repeated so that the second lead 220 sequentially forms at least two layers of winding arranged from the inside to the outside. At this time, the second lead 70 is always located outside the inductor coil 100, while the first lead 60 spirals from the second end of the inductor coil 100 from the inside to the outside to extend outward across the at least two layers of winding connected in sequence to the outside of the inductor coil 100.

[0054] Example 2, refer to Figure 4 and Figure 9 The inductor coil 100 has at least four winding layers. The inductor coil 100 includes an innermost coil and a first winding structure 20. The lead-out end of the innermost coil is connected to a first transition section 30. The first winding structure 20 includes two layers arranged sequentially from the inside out. The inductor coil 100 also includes a second winding structure 40, which is located outside the first winding structure 20 and includes at least one winding layer. The first winding structure 20 is connected to the lead-out end of the first transition section 30. Alternatively, a second transition section 50 can be provided to connect to the lead-out end of the first winding structure 20, so that the lead-out end of the second transition section 50 serves as the second lead-out end 70, facilitating wiring on the outside of the inductor coil 100.

[0055] Correspondingly, the first lead-out section 210 of the lead wire 200 spirally extends from the first end along the height direction of the inductor coil 100 to the second end to form the innermost winding 10 of the inductor coil 100. The second lead-out section 220 spirally extends around the innermost winding 10 to the second end to form the second winding. Starting from the second winding, the second lead-out section 220 spirally extends back and forth along the height direction of the inductor coil 100 to form at least two layers of windings connected in sequence as the first winding structure 20, so that the lead-out ends of the first winding structure 20 are spaced apart from the second end. For example, when the first winding structure 20 has multiple layers of windings, the lead-out section of the outermost winding of the first winding structure 20 is further away from the second end along the extension direction. When the first winding structure 20 has more than two layers of windings, the lead-out section of the outermost winding of the first winding structure 20 is further away from the second end along the extension direction. When the number of winding layers is odd, the outermost winding may not extend completely to the second end; and the first lead-out section 210 extends spirally from the second end of the inductor coil 100 from the inside to the outside to successively cross the first winding structure 20 formed by the second lead-out section 70, and then extends spirally from the second end along the height direction of the inductor coil 100 to form the second winding structure 40 outside the first winding structure 20. The second winding structure 40 may have only one winding layer. When the first winding structure 20 includes multiple winding layers, the second winding structure 40 is wound outside the outermost winding of the first winding structure 20. When the first winding structure 20 is an odd-numbered winding layer, the inner winding layer of the second winding structure 40 may be located on the same layer as the outermost winding of the first winding structure 20.

[0056] Reference Figure 2 Since the second lead-out section 220 forms a second winding structure 40 formed by the first lead-out section 210 on the outside of the winding, in order to bring the second lead-out end 70 out of the outside of the inductor coil 100, the second lead-out end 70 is located between the first end and the second winding structure 40. At this time, the second lead-out section 220 extends spirally from the lead-out end of the first winding structure 20 from the inside to the outside to cross the second winding structure 40 and extend to the outside of the inductor coil 100 to form the second lead-out end 70.

[0057] Compared with Embodiment 1, in Embodiment 1, the first lead-out section 210 only forms the innermost winding 10 and the first transition section 30 that crosses the first winding structure 20. In this embodiment, in addition to forming the innermost winding 10 and the first transition section 30, the first lead-out section 210 also forms the second winding structure 40 outside the first winding structure 20.

[0058] Example 3, referring to Figure 10 Based on Embodiment 2, this embodiment sets at least two sets of first winding structures 20, and establishes another set of first winding structures 20 outside the second winding structure 40. Furthermore, the first winding structures 20 and the second winding structures 40 are arranged alternately from the inside to the outside, and the outermost winding can be either the first winding structure 20 or the second winding structure 40.

[0059] In other words, the main feature of the inductor coil 100 structure in this application is that a transition section extending circumferentially along the end of the inductor coil 100 is provided, allowing the inner lead-out end to extend to the outer side of the inductor coil 100. This allows control over the lead-out direction, and the transition section also forms a coil structure. This avoids the problem of increasing the height of the inductor coil 100 by one wire diameter due to direct radial lead-out as in conventional structures, thus improving the shock resistance and performance reliability of the inductor coil 100. When the inductor coil 100 is a magnetic core coil, there is no need to open clearance slots or clearance holes on the magnetic core to allow the first lead-out end 60 to extend to the outer side of the inductor coil 100, simplifying the structure of the inductor coil 100 and reducing the difficulty of winding.

[0060] Therefore, it can be understood that the inductor coil 100 of the present invention allows the lead-out end of the inner winding to extend circumferentially from the end of the inductor coil 100 to the outer side of the inductor coil 100. At this time, both leads of the inductor coil 100 are on the outer side of the coil, which improves the convenience of wiring. At the same time, the transition section at the end also has at least a partial coil structure, which can play an inductive role and can control the direction of the lead-out end from the periphery of the inductor coil 100. It is not necessary to extend the lead-out end directly from the radial direction of the inductor coil 100 as in the conventional way, which would increase the height of the inductor coil 100. It is also not necessary to open the avoidance groove or avoidance hole in the winding part 300 such as the magnetic core or jig, which simplifies the structural design of the inductor coil 100, reduces the winding difficulty of the inductor coil 100, and improves the vibration resistance and reliability of the inductor coil 100.

[0061] Please refer to Figure 7 and Figure 8 In some embodiments of this application, the first winding structure 20 includes at least two layers of windings arranged sequentially from the inside to the outside. Between two adjacent layers of windings, the outer winding is folded back from the end of the inner coil and wrapped around the outside of the inner coil along the height direction of the inductor coil.

[0062] In this embodiment, the second lead-out section 220 extends spirally along the height direction of the inductor coil 100 to form a first winding structure 20 outside the innermost winding 10. The first winding structure 20 includes at least two layers of windings arranged sequentially from the inside to the outside. That is, the second lead-out section 220 extends spirally from the first end around the innermost winding 10 to the second end to first form a second layer of winding, and then extends spirally from the second end around the second layer of winding to the first end to form a third layer of winding. In this way, the second lead-out section 220 extends spirally back and forth between the first end and the second end along the height direction of the inductor coil 100 to form a multi-layer winding structure arranged sequentially from the inside to the outside.

[0063] It should be noted that, as Figure 7 As shown, it is not necessary to form the outermost winding along the entire height of the inductor coil 100. The required height can be wound according to actual needs. That is, the height position and wire direction of the lead end in the inductor coil 100 can be adjusted according to actual needs, which improves the flexibility and applicability of the inductor coil 100 and facilitates the wiring of the inductor coil 100.

[0064] Please refer to Figure 4 and Figure 9 In some embodiments of this application, the inductor coil 100 further includes a second winding structure 40, which is wound around the outer side of the first winding structure 20 from the end of the first transition section 30 away from the innermost winding 10, and is located between the outermost end of the first winding structure 20 and the first transition section 30 in the height direction of the inductor coil 100.

[0065] Referring to the aforementioned Embodiment 2, in this embodiment, a second winding structure 40 is provided outside the first winding structure 20. The starting end of the second winding structure 40 is connected to the lead-out end of the first transition section 30, so that the lead-out end of the second winding structure 40 serves as the first lead-out end 60. It can be understood that when the first lead-out end 60 is extended to the outside of the inductor coil 100 through the first transition section 30, the first lead-out end 60 is always located at the second end of the inductor coil 100. At this time, by connecting the second winding structure 40 to the lead-out end of the first transition section 30, the number of winding layers of the second winding structure 40 can be wound according to the required wiring height, thereby controlling the wiring position and height of the first lead-out end 60 and improving the ease of wiring the first lead-out end 60. At this time, since the first lead-out section 210 extends from the second end of the inductor coil 100 towards the direction closer to the first end, if the lead-out end of the second lead-out section 220 is still located at the second end, it is necessary for the second lead-out section 220 to extend outward through the winding formed by the first lead-out section 210. In this embodiment, the second winding structure 40 is positioned between the outermost end of the first winding structure 20 and the first transition section 30 in the height direction of the inductor coil 100, to avoid the second winding structure 40 obscuring the outermost end of the first winding structure. At this time, the first winding structure 20 can be configured as a multi-layer structure, such that the outermost winding of the first winding structure 20 extends from the first... The two ends extend towards the first end, but it is not necessary to extend completely to the position of the first end. It is only necessary to extend the lead end of the outermost winding of the first winding structure 20 to the position between the second winding structure 40 and the first end. Alternatively, the first winding structure 20 can be set as an odd-layer structure. In this case, the outermost winding of the first winding structure 20 extends from the first end towards the second end. It is only necessary to control the outermost winding of the first winding structure 20 not to extend to the height position of the second winding structure 40. In this case, the inner layer winding of the second winding structure 40 and the outermost winding of the first winding structure 20 can be located on the same layer.

[0066] It should be noted that if the second winding structure 40 has only one layer of winding and the second winding structure 40 does not extend completely to the first end, then the lead-out ends of the first winding structure 20 and the second winding structure 40 are both outside the inductor coil 100. If the second winding structure 40 has two layers of winding or the second winding structure 40 extends to the first end, the second transition section 50 can be connected to the lead-out end of the first winding structure 20 in the following embodiment, so that the lead-out end of the second transition section 50 is used as the second lead-out end 70 for wiring outside the inductor coil 100.

[0067] Please refer to Figure 2 and Figure 10In some embodiments of this application, the inductor coil 100 further includes a second transition section 50, which is located on the side of the second winding structure 40 opposite to the first transition section 30, and extends from the outermost end of the first winding structure 20 along at least a portion of the circumference of the inductor coil 100 to the outside of the second winding structure 40.

[0068] In this embodiment, since the second winding structure 20 formed by the second lead-out section 220 has a second winding structure 40 formed by the first lead-out section 210 on its outer side, in order to lead the second lead-out end 70 out of the outer side of the inductor coil 100, the second lead-out section 220 is extended from the inside to the outside along the circumference of the inductor coil 100 to form a second transition section 50, so as to cross the second winding structure 40 and extend to the outer side of the inductor coil 100. This avoids the problem of the lead wire 200 bending and the inductor coil 100 increasing in height by one wire diameter when the second lead-out section 220 directly crosses the second winding structure 40 radially, thereby improving the shock resistance and performance reliability of the inductor coil 100. The extension circumference of the second transition section 50 can be set according to the wiring position of the second lead-out end 70 to control the exit position of the second lead-out end 70.

[0069] Please refer to Figure 10 In some embodiments of this application, the first winding structure 20 includes multiple layers of windings.

[0070] In this embodiment, the second lead-out section 220 forms a first winding structure 20 with multiple winding layers outside the innermost winding 10, so that the outermost winding of the first winding structure 20 extends from the second end towards the first end, so that the lead-out end of the first winding structure 20 is located at the first end of the inductor coil 100, thereby making the second transition section 50 located at the first end, making the number of coils in each layer of the inductor coil 100 uniform in the height direction, and improving the inductance performance of the inductor coil 100.

[0071] Please refer to Figure 10 In some embodiments of this application, the first winding structure 20 is provided with at least two sets, a second winding structure 40 is sandwiched between two adjacent sets of the first winding structure 20, and the two adjacent sets of the first winding structure 20 are connected by a first transition section 30.

[0072] And / or, the second winding structure 40 is provided with at least two sets, the first winding structure 20 includes two layers of windings, and a first winding structure 20 is sandwiched between two adjacent sets of first winding structures 20 and connected by a second transition section 50.

[0073] In this embodiment, the first winding structure 20 is provided with at least two sets, and a second winding structure 40 is sandwiched between the two sets of first winding structures 20, such that the two sets of first winding structures 20 are connected by a first transition section 30. At this point, the first lead-out section 210 may spirally extend from the first end along the height direction of the inductor coil 100 to the second end to form the innermost winding 10 of the inductor coil 100. The second lead-out section 220 may spirally extend from the outer side of the innermost winding 10 along the height direction of the inductor coil 100 to form at least two layers of windings connected in sequence as the first winding structure 20. After the first lead-out section 210 spirally crosses the first winding structure 20 at the second end, it spirally extends from the second end along the height direction of the inductor coil 100 to the first end from the outer side of the plurality of windings formed at the second lead-out end 70 to form at least two layers of second winding structure 40. The second lead-out section 220 may then form a second transition section 50 that crosses the second winding structure 40 and spirally extends from the second end along the height direction of the inductor coil 100 to the outer side of the second winding structure 40 to form another first winding structure 20, and so on. When the first winding structure 20 has at least three layers, the second winding structure 40 has at least two layers. At this time, a first winding structure 20 is sandwiched between the two sets of second winding structures 40, and the two sets of second winding structures 40 are connected by a second transition section 50.

[0074] It should be noted that the number of winding layers in any two sets of first winding structures 20 can be the same or different, and the number of winding layers in any two sets of second winding structures 40 can be the same or different, which will not be elaborated here.

[0075] Please refer to Figure 10 In some embodiments of this application, the first winding structure 20 includes two layers of windings.

[0076] In the aforementioned embodiment, the position and height of the first lead-out end 60 can be controlled by setting a second winding structure 40 outside the first winding structure 20. In this embodiment, the number of winding layers between the innermost winding 10 and the second winding structure 40 is two. With this configuration, when winding the four turns of the inner side of the inductor coil 100, the first lead-out section 210 forms the first and fourth winding layers, and the second lead-out section 220 forms the second and third winding layers. At this time, both the first lead-out section 210 and the second lead-out section 220 form two winding layers and are adjacent to each other. With this configuration, the first lead-out section 210 and the second lead-out section 220 can be wound simultaneously from the dividing point. 20. When the first lead-out section 210 forms the innermost winding 10, the second lead-out section 220 simultaneously winds to form the second winding, following the formation of the innermost winding 10. Then, the second lead-out section 220 winds the third winding based on the second winding. At this time, the first lead-out section 210 simultaneously winds the fourth winding, following the second lead-out section 220. Thus, while the second lead-out section 220 winds to form two windings, the first lead-out section 210 also simultaneously forms two windings, improving the winding efficiency of these four windings.

[0077] Similarly, when the inductor coil 100 includes at least two sets of first winding structures 20, each set of first winding structures 20 can have two layers or any one set of first winding structures 20 can have two layers, so that the winding efficiency can be significantly improved when winding the four-layer winding structure formed by the set of first winding structures 20 and its inner and outer side windings.

[0078] In addition, in some embodiments, when a second winding structure 40 is provided and a first winding structure 20 is located outside the second winding structure 40, the number of layers of the second winding structure 40 can be set to two layers. In this case, the second winding structure 40 and the two layers of windings inside and outside it form a four-layer winding. Similarly, the first lead-out section 210 and the second lead-out section 220 can be wound simultaneously to form a two-layer winding when spirally extended along the height direction of the inductor coil 100, thereby improving the winding efficiency of this four-layer winding.

[0079] It is not difficult to understand that in some embodiments, when setting up multi-layer windings, the first winding structure 20 and the second winding structure 40 can be arranged in an alternating manner, and both the first winding structure 20 and the second winding structure 40 include two layers of windings. With this arrangement, as long as the winding speed is set, the first lead segment 210 and the second lead segment 220 can be wound synchronously from the starting point, so that when the first lead segment 210 and the second lead segment 220 are spirally wound once along the height direction of the inductor coil 100, two layers of windings are formed simultaneously, thereby improving the winding efficiency of the inductor coil 100.

[0080] Please refer to Figure 10In some embodiments of this application, the second winding structure 40 includes at least two layers of windings arranged from the inside to the outside. Between two adjacent layers of windings, the outer winding is folded back from the end of the inner coil and wrapped around the outside of the inner coil along the height direction of the inductor coil.

[0081] In the aforementioned embodiment, the position and height of the lead-out terminal 60 can be controlled by the configuration of the second winding structure 40. In this embodiment, the second winding structure 40 includes at least two layers of windings arranged sequentially from the inside out. That is, the first lead-out segment 210 spirally extends from the second end around the first winding structure 20 to the second end to form a first layer of winding, and then spirally extends from the first end to the second end to form another layer of winding. This process is repeated so that the first lead-out segment 210 spirally extends back and forth between the first end and the second end along the height direction of the inductor coil 100, thereby forming a multi-layer winding structure arranged sequentially from the inside out. This allows for the configuration of the appropriate number of winding layers as needed.

[0082] Please refer to Figure 1 and Figure 2 In some embodiments of this application, the first transition segment 30 extends outward after extending half a circumference at the end of each layer of the first winding structure 20.

[0083] Understandably, in the technical solution of this application, the transition section connected to the lead-out end of the inner winding extends circumferentially from the inside to the outside at the end of the inductor coil 100 when crossing the outer winding, thereby forming a coil structure by the transition section of the lead-out end and preventing the lead-out end from directly crossing the end face of the inductor coil 100. In this embodiment, when the lead-out end located on the inner side extends outward in a spiral, it extends half a turn on each layer of winding it crosses before crossing outward. This arrangement allows the bending amplitude of the lead-out end when crossing the winding to be similar to the shape of the winding it crosses, so as to naturally extend outward to form a coil structure.

[0084] In some embodiments, the first winding structure 20 has two winding layers, or the second winding structure 40 has two winding layers, such that the first transition section 30 or the second transition section 50 extends half a circumference at the ends of the two winding layers it crosses, so that the lead-out end returns to its circumferential lead-out position when it is not crossed; Figure 1 As shown in the example, when the first transition segment 30 crosses the first winding structure 20, it extends half a circumference at the end of the second layer winding. At this time, the position of the first lead-out end 60 in the circumference of the inductor coil 100 is consistent with the lead-out position of the innermost winding 10, so as to avoid the change of the lead-out position after the lead-out end crosses. Of course, when the lead-out segment crosses to the outermost winding, such as when the first transition segment 30 crosses the third layer winding, it can extend more than half a circumference at the end face of the outermost winding or extend to the required wiring position according to the wiring position. There is no limitation here.

[0085] Please refer to Figure 4 In some embodiments of this application, the coils of two adjacent winding layers are staggered.

[0086] In this application, the inductor coil 100 has leads 200 that extend in a reciprocating spiral along the height direction of the inductor coil 100 to form a multi-layered winding arranged layer by layer from the inside out. Starting from the second layer of windings, each winding uses an adjacent inner winding as its winding base. In this embodiment, the coils of adjacent winding layers are staggered. It is understood that each winding layer has a spiral structure, including multiple layers of coils stacked together. In this case, in adjacent winding layers, each layer of coil in the outer winding is located in a groove structure formed by two adjacent layers of coil in the inner winding. This arrangement ensures that each layer of coil in the outer winding is limited by the inner winding, and the multiple windings mutually limit each other, improving the stability of the inductor coil 100 structure. Simultaneously, it increases the coil density in the height direction of the inductor coil 100, increases the inductance of the inductor coil 100, and improves the performance of the inductor coil 100.

[0087] Please refer to Figure 5 In some embodiments of this application, the winding directions of two adjacent layers of winding are opposite.

[0088] In this embodiment, the coils on adjacent winding layers of the inductor coil 100 have opposite rotation directions. It can be understood that the inductor coil 100 of this application is formed by reciprocating winding of leads 200 between a first end and a second end to create multiple windings arranged sequentially from the inside out. If adjacent winding layers are formed by windings of a first lead segment 210 and a second lead segment 220 respectively, making the winding directions of the two winding layers opposite, and causing the first lead segment 210 and the second lead segment 220 to intersect at the crossing position to form a structure similar to α, so that... The outer winding presses against the end of the inner winding, improving the structural stability of the inner winding. It also eliminates the need to fold the lead wire 200 to stack the first lead segment 210 and the second lead segment 220 to form two layers of winding. When two adjacent layers of winding are formed by the same lead segment, the lead segment is wound back and forth between the first end and the second end. At this time, the winding directions of the two adjacent layers of winding are opposite. Since the extension direction of the lead segment is opposite, the helical direction of the lead segment will remain consistent. There is no need to change the winding direction, which improves the convenience of coil winding.

[0089] In some embodiments of this application, the inductor coil 100 is an air-core coil or a magnetic core coil.

[0090] In this embodiment, the inductor coil 100 can be an air-core coil or a magnetic core coil. When the inductor coil 100 is an air-core coil, it can be wound on a fixture first. After winding, the fixture is removed to form an air-core coil. At this time, both leads of the inductor coil 100 are on the outside, avoiding interference between the fixture and the leads or pulling on the leads when the fixture is removed. When the inductor coil 100 is a magnetic core coil, the lead wire 200 is directly wound on the magnetic core to form a coil winding. At this time, both leads of the inductor coil 100 are on the outside, eliminating the need to open clearance holes or clearance slots on the magnetic core for the lead wires to be led out, thus simplifying the structural design of the magnetic core.

[0091] This application also proposes an electronic device, which includes the inductor coil 100 described in any of the foregoing embodiments. The specific structure of the inductor coil 100 is as described in the foregoing embodiments and will not be repeated here. The electronic device may be, but is not limited to, consumer electronics, automotive electronics, military and aerospace equipment, etc.

[0092] Since the electronic device proposed in this application applies all the technical solutions of all the foregoing embodiments, it has at least all the beneficial effects brought by all the foregoing technical solutions, which will not be elaborated here.

[0093] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An inductor coil, characterized by, The inductor coil comprises: an innermost winding having a first end and a second end spaced along a height direction of the inductor coil; a first winding structure wound outside the innermost winding from the first end, the first winding structure comprising at least two layers of windings arranged from inside to outside, between two adjacent layers of windings, an outer winding is folded and wrapped around an inner winding from a terminal end of the inner winding along a height direction of the inductor coil; a first transition section located at one end where the second end is located, and extending from the second end to outside of the first winding structure along at least a part of a circumferential direction of the inductor coil from inside to outside; and a second winding structure wound outside the first winding structure from an end of the first transition section away from the innermost winding, and located between an outermost end of the first winding structure and the first transition section in the height direction of the inductor coil; the inductor coil further comprises a second transition section located at a side of the second winding structure away from the first transition section, and extending from the outermost end of the first winding structure to outside of the second winding structure along at least a part of a circumferential direction of the inductor coil from inside to outside; the first winding structure is provided in at least two groups, and a second winding structure is arranged between two adjacent groups of the first winding structure, and the two adjacent groups of the first winding structure are connected by a second transition section.

2. The inductor of claim 1, wherein, the second winding structure is provided in at least two groups, the first winding structure comprises two layers of windings, and a first winding structure is arranged between two adjacent groups of the second winding structure and connected by a first transition section.

3. The inductor of claim 1, wherein, the second winding structure comprises at least two layers of windings arranged from inside to outside, and between two adjacent layers of windings, an outer winding is folded and wrapped outside an inner winding from a terminal end of the inner winding along a height direction of the inductor coil; and / or, the first winding structure comprises two layers of windings.

4. The inductor of claim 1, wherein the first transition section extends outwardly after extending half a circumference at an end of each layer of windings of the first winding structure.

5. The inductor of claim 1, wherein the coils of two adjacent layers of windings are arranged in a staggered manner; and / or, the winding directions of two adjacent layers of windings are opposite.

6. An inductor coil as claimed in any one of claims 1 to 5, characterised in that, The inductor coil is a hollow coil or a magnetic core coil.

7. An electronic device, comprising: The electronic device comprises the inductor coil as claimed in any one of claims 1 to 6.

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