Magnetic induction structure

Abstract

This invention discloses a magnetic induction structure. The magnetic induction structure includes a first coil assembly, an insulating unit, a second coil assembly, and a magnetic component. The insulating unit partially covers the first coil assembly, leaving one end of the first coil assembly exposed. The second coil assembly straddles the insulating unit, allowing it to be positioned on both sides of the insulating unit. The magnetic component passes through the first coil assembly, the insulating unit, and the second coil assembly. The magnetic component and the second coil assembly are defined as a spacing target, and any conductive element and any through-hole of the first coil assembly has a minimum distance of not less than 0.4 mm to the spacing target. Accordingly, the magnetic induction structure can meet safety standards with minimal manufacturing cost.

Description

Technical Field

[0001] This invention relates to an induction structure, and more particularly to a magnetic induction structure. Background Technology

[0002] To comply with safety regulations, existing magnetic induction structures (such as planar transformers) mostly employ blind holes and buried holes in their printed circuit board (PCB) coils. However, blind holes and buried holes are more complex to manufacture, resulting in higher costs. This makes the overall cost of magnetic induction structures remain high despite the need to meet safety regulations.

[0003] Therefore, the inventor believed that the above-mentioned defects could be improved, and thus devoted himself to research and applied scientific principles, and finally proposed an invention that is reasonably designed and effectively improves the above-mentioned defects. Summary of the Invention

[0004] The technical problem to be solved by this invention is to "reduce manufacturing costs and meet safety standards", and to provide a magnetic induction structure that addresses the shortcomings of existing technologies.

[0005] This invention discloses a magnetic induction structure, comprising: a first coil assembly, including a first body, a plurality of conductive elements, at least one via hole, and a plurality of conductive coils, wherein the plurality of conductive coils are embedded in the first body and electrically coupled to each other through the at least one via hole; the first body has an extension portion and a main body portion, the first body having a first adapter hole in the main body portion; the plurality of conductive elements being disposed in the extension portion; the at least one via hole being disposed in the main body portion; and the plurality of conductive elements being electrically coupled to the plurality of conductive coils through the at least one via hole; an insulating unit covering a portion of the first coil assembly, the insulating unit comprising: a covering portion covering the at least one via hole and the first adapter hole, wherein the extension portion is exposed outside the covering portion; each side of the covering portion having a mounting surface; a retaining wall portion extending from one end of the covering portion along a thickness direction of the first body; and a second coil assembly disposed on the insulating unit, the second coil... The coil assembly includes a second body and two connectors connecting the second body. The second body straddles the cover portion, with the two connectors respectively located on the two mounting surfaces. The second body has a second adapter hole corresponding to the position of the first adapter hole. A magnetic assembly includes: a pillar block disposed within the first and second adapter holes; and two plates connecting the two ends of the pillar block and covering both sides of the second coil assembly along the thickness direction. The two plates form an opening at the end of the cover portion away from the retaining wall portion, allowing the two connectors to be exposed on the outside of the two plates. The magnetic assembly and the second coil assembly are defined as a spacing target, and each conductive element and at least one through-hole has a shortest distance to the spacing target, and the shortest distance is not less than 0.4 millimeters (mm).

[0006] Preferably, the shortest distance is an electrical clearance or a creepage distance.

[0007] Preferably, the second body comprises: a first conductive portion having a first middle section and two first side sections connected to the first middle section, wherein one of the first side sections is electrically coupled to one of the connectors; and a second conductive portion having a second middle section and two second side sections connected to the second middle section, wherein the two second side sections are perpendicular to the two first side sections, and one of the second side sections is electrically coupled to the other first side section, and the other second side section is electrically coupled to the other connector; wherein the first conductive portion, the second conductive portion, and the two connectors surround to form the second adapter hole.

[0008] Preferably, the second body comprises: N first conductive portions, spaced vertically from each other, each first conductive portion having a first middle section and two first side sections connecting the first middle section; and N second conductive portions, each disposed between two adjacent first conductive portions, each second conductive portion having a second middle section and two second side sections connecting the second middle section, the two second side sections being perpendicular to the two first side sections, and the two second side sections of each second conductive portion being electrically coupled to one of the first side sections of the two adjacent first conductive portions; wherein, among the first side sections and second side sections furthest from each other, the first side section is electrically coupled to one of the connectors, and the second side section is electrically coupled to the other connector; wherein the N first conductive portions, the N second conductive portions, and the two connectors surround to form the second adapter hole; wherein N is a positive even number not less than 2.

[0009] Preferably, the second body further includes a transverse portion, the two ends of which are electrically coupled to the first side segment of the first conductive portion and the second side segment of the second conductive portion, which are closest to each other, and the transverse portion is located at the opening and exposed outside the two plates, and the length of the transverse portion is not less than the height of the covering portion along the thickness direction.

[0010] Preferably, N first conductive parts and N second conductive parts are evenly distributed on the two mounting surfaces.

[0011] Preferably, the first body is a printed circuit board coil, and the second body is a copper sheet coil or a printed circuit board coil.

[0012] Preferably, the area of ​​a wide side of the retaining wall portion is larger than the area of ​​a narrow edge of the extension portion.

[0013] Preferably, the second body comprises: two sub-circuit boards, each comprising: an insulating carrier; a plurality of coils embedded within the insulating carrier; and at least one via hole electrically coupled to the plurality of coils; and at least one spanner located at the opening and exposed outside the two sub-circuit boards, the at least one spanner electrically coupled to the two sub-circuit boards.

[0014] Preferably, the area of ​​a wide side of the insulating carrier of each sub-circuit board is equal to the area of ​​a wide side of the main body, and the insulating carrier of each sub-circuit board has an opening corresponding to the first adapter hole.

[0015] In summary, the magnetic induction structure disclosed in the embodiments of the present invention can achieve safety standards at the lowest manufacturing cost through the design of "the insulating unit covers at least one of the through holes and the first adapter hole, and the second body straddles the covering portion of the insulating unit" and "any of the conductive elements and any of the through holes of the first coil assembly have a shortest distance to the spacing target, and the shortest distance is not less than 0.4 mm".

[0016] To further understand the features and technical content of this invention, please refer to the following detailed description and accompanying drawings. However, these descriptions and drawings are only for illustrating the invention and are not intended to limit the scope of protection of the invention in any way. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the magnetic induction structure according to the first embodiment of the present invention.

[0018] Figure 2 This is a three-dimensional schematic diagram of the magnetic induction structure of the first embodiment of the present invention from another perspective.

[0019] Figure 3 This is a side view of the magnetic induction structure according to the first embodiment of the present invention.

[0020] Figure 4 This is a top view of the magnetic induction structure according to the first embodiment of the present invention.

[0021] Figure 5 This is an exploded view of the magnetic induction structure according to the first embodiment of the present invention.

[0022] Figure 6 This is an exploded view of the magnetic induction structure of the first embodiment of the present invention from another perspective.

[0023] Figure 7 This is a three-dimensional schematic diagram of the first coil assembly according to the first embodiment of the present invention.

[0024] Figure 8 This is a perspective view of the insulating unit disposed on the first coil assembly according to the first embodiment of the present invention.

[0025] Figure 9 This is a three-dimensional schematic diagram of the second coil assembly according to the first embodiment of the present invention.

[0026] Figure 10 This is a three-dimensional schematic diagram of the second coil assembly in the first embodiment of the present invention when unfolded.

[0027] Figure 11 This is a three-dimensional schematic diagram of the second coil assembly in another state according to the first embodiment of the present invention when it is unfolded.

[0028] Figure 12 for Figure 1 A schematic diagram of a cross section along line XII-XII.

[0029] Figure 13 This is an exploded view of the magnetic induction structure according to the second embodiment of the present invention. Detailed Implementation

[0030] The following specific embodiments illustrate the implementation methods disclosed in this invention. Those skilled in the art can understand the advantages and effects of this invention from the content disclosed in this specification. This invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this invention. Furthermore, the accompanying drawings of this invention are for simple illustrative purposes only and are not depictions of actual dimensions; this is stated beforehand. The following embodiments will further describe the relevant technical content of this invention in detail, but the disclosed content is not intended to limit the scope of protection of this invention.

[0031] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used herein may, depending on the context, include any combination of one or more of the related listed items. Moreover, the term "electrical coupling" as used herein refers to either "indirect electrical connection" or "direct electrical connection."

[0032] [First Embodiment]

[0033] See Figures 1 to 12 As shown, this embodiment provides a magnetic induction structure 100. (As illustrated...) Figure 1 and Figure 2 As shown, the magnetic induction structure 100 includes a first coil assembly 1, an insulating unit 2 covering a portion of the first coil assembly 1, a second coil assembly 3 disposed on the insulating unit 2, and a magnetic component 4 passing through the first coil assembly 1, the insulating unit 2, and the second coil assembly 3. The first coil assembly 1 and the second coil assembly 3 can serve as the primary and secondary sides of the magnetic induction structure 100, respectively, thereby enabling the magnetic induction structure 100 to adjust the voltage.

[0034] like Figures 5 to 7As shown, the first coil assembly 1 includes a first body 11, a plurality of conductive elements 12 and a plurality of via holes disposed on the first body 11, and a plurality of conductive coils (not shown in the figure) embedded in the first body 11.

[0035] Cooperate Figure 7 As shown, the first body 11 is a plate-shaped printed circuit board coil (i.e., PCB), and the first body 11 has a length direction D1, a width direction D2 perpendicular to the length direction D1, and a thickness direction D3 perpendicular to the length direction D1 and the width direction D2. The length direction D1 and the width direction D2 are the extending directions of the long side and the wide side W11 of the first body 11, respectively, and the thickness direction D3 is the extending direction of the short side of the narrow edge N11 of the first body 11 (connecting the two wide side surfaces W11).

[0036] The first body 11 has a plurality of conductive rings (not shown) formed by printing layout, and the first body 11 has a main body 111, an extension 112 connected to the main body 111, and a first adapter hole H11 located on the main body 111.

[0037] Furthermore, the main body 111 is generally rectangular in this embodiment, but the invention is not limited thereto. The extension 112 extends from one end of the main body 111 away from the first adapter hole H11, and the extension 112 is spaced apart from the main body 111 by a distance, so that the extension 112 and the main body 111 can jointly form a groove G, but the invention is not limited thereto. For example, in other embodiments of the invention not shown, the first body 11 may omit the aforementioned groove G.

[0038] In a preferred embodiment, in conjunction with Figure 4 and Figure 7 As shown, the length L112 of the extension 112 along the width direction D2 is greater than the length L111 of the main body 111 along the width direction D2, so that a portion of the extension 112 can protrude relative to the main body 111. That is, the orthographic projection area of ​​the main body 111 onto the extension 112 can only cover the side of the extension 112 facing the main body 111.

[0039] like Figure 7As shown, a plurality of conductive elements 12 are disposed on the extension 112, and the plurality of conductive elements 12 are electrically coupled to a plurality of conductive rings (not shown) located within the first body 11. In this embodiment, the plurality of conductive elements 12 may be gold fingers located on the aforementioned protruding extension 112, but the present invention is not limited thereto.

[0040] In practice, the position and type of the multiple conductive elements 12 can be reasonably adjusted according to design requirements. For example, the multiple conductive elements 12 can be replaced by via holes or pins, or the conductive elements 12 that are gold fingers can be distributed throughout the entire extension 112.

[0041] like Figure 7 The at least one of the through holes 13 is disposed in the area of ​​the main body 111 adjacent to the first adapter hole H11, and the at least one of the through holes 13 is electrically coupled to a plurality of conductive rings (not shown) located in the first body 11.

[0042] It should be noted that the first coil assembly 1 can achieve electromagnetic induction through multiple conductive coils, multiple conductive elements 12, and at least one through hole 13. However, the method of achieving electromagnetic induction through multiple conductive coils, multiple conductive elements 12, and at least one through hole 13 is prior art and not the focus of this invention; therefore, it will not be described in detail here.

[0043] Cooperate Figure 5 and Figure 8 As shown, in this embodiment, the insulating unit 2 is partially covered by the first coil assembly 1 by injection molding, and the insulating unit 2 is integrally formed with a covering portion 21 and a retaining portion 22 connected to the covering portion 21.

[0044] In detail, such as Figure 8 As shown, the covering portion 21 covers the outer edge of the main body portion 111, exposing the extension portion 112 to the outside of the covering portion 21. That is, at least one of the through holes 13 and the first adapter hole H11 are covered by the covering portion 21. The covering portion 21 has a through hole H21 corresponding to the first adapter hole H11, and two mounting surfaces 221 (i.e., wide sides) corresponding to opposite sides of the main body portion 111.

[0045] The retaining wall portion 22 extends from one end of the covering portion 21 (adjacent to the extension portion 112) along the thickness direction D3 (i.e. Figure 8 The wall portion 22 extends in the vertical direction and is formed therefrom, and the position of the retaining wall portion 22 corresponds to the position of the groove G (e.g., in the vertical direction). Figure 2(As shown). In another way, in this embodiment, the retaining wall portion 22 and the covering portion 21 are each a rectangular plate structure, and the retaining wall portion 22 is perpendicular to the covering portion 21.

[0046] It is worth noting that, such as Figure 8 As shown, the area of ​​the wide side W22 of the retaining wall portion 22 is larger than the area of ​​the narrow edge N112 of the extension portion 112. That is, the area of ​​the extension portion 112 projected onto the retaining wall portion 22 is located on the wide side W22 of the retaining wall portion 22. This allows the multiple conductive elements 12 located on the extension portion 112 to be separated from the main body portion 111, the second coil assembly 3, and the magnetic assembly 4 (which will be further described later) by the retaining wall portion 22.

[0047] Cooperate Figure 5 , Figure 9 ,and Figure 10 As shown, the second coil assembly 3 includes a second body 31 and two connectors 32 connecting the second body 31. In this embodiment, the second body 31 and the two connectors 32 are integrally connected as a single component, but the invention is not limited thereto. The second body 31 straddles the cover portion 21, allowing the two connectors 32 to be located on the two mounting surfaces 221 respectively for electrically coupling an electronic device (not shown).

[0048] In detail, the second body 31 in this embodiment is a copper sheet coil, and includes N first conductive parts 311 and N second conductive parts 312 arranged alternately, and a transverse part 313 connecting the adjacent first conductive parts 311 and second conductive parts 312; wherein, N is a positive even number not less than 2.

[0049] Cooperate Figure 9 and Figure 10 The N first conductive portions 311 shown are arranged vertically at intervals and are generally U-shaped, having a first middle section 3111 and two first side sections 3112 connecting the first middle section 3111. In this embodiment, the two first side sections 3112 extend from both ends of the first middle section 3111, and the two first side sections 3112 are parallel to each other and perpendicular to the first middle section 3111, so that the two first side sections 3112 and the first middle section 3111 can jointly form a first opening K311, but the present invention is not limited thereto. For example, in other embodiments of the present invention not shown, the included angle between each first side section 3112 and the first middle section 3111 is not equal to 90 degrees.

[0050] N second conductive parts 312 are each disposed between two adjacent first conductive parts 311, and each second conductive part 312 is electrically coupled to two adjacent first conductive parts 311, that is, the N second conductive parts 312 and the N first conductive parts 311 are arranged alternately on top of each other.

[0051] Each of the second conductive portions 312 is generally U-shaped and has a second middle section 3121 and two second side sections 3122 connecting the second middle section 3121. In this embodiment, the two second side sections 3122 extend from both ends of the second middle section 3121, and the two second side sections 3122 are parallel to each other and perpendicular to the second middle section 3121, so that the two second side sections 3122 and the second middle section 3121 can jointly form a second opening K312, but the present invention is not limited thereto. For example, in other embodiments of the present invention not shown, the included angle between each second side section 3122 and the second middle section 3121 is not equal to 90 degrees.

[0052] It is worth mentioning that the second coil assembly 3 is in a stacked configuration (such as...). Figure 9 (as shown) and the unfolding situation (as shown) Figure 10 As shown below, the direction of the first opening K311 of the adjacent first conductive portion 311 is different from the direction of the second opening K312 of the second conductive portion 312. That is, the two second side segments 3122 of each second conductive portion 312 are perpendicular to the two first side segments 3112 of each first conductive portion 311.

[0053] like Figure 1 and Figure 5 As shown, in this embodiment, the span portion 313 is located on the side of the covering portion 21 away from the retaining wall portion 22 (i.e., the covering portion 21 is away from the narrow edge N21 of the extension portion 112), and the length of the span portion 313 is preferably not less than the height of the covering portion 21 along the thickness direction D3. The two ends of the span portion 313 are electrically coupled to the first side segment 3112 of the first conductive portion 311 and the second side segment 3122 of the second conductive portion 312, which are adjacent to each other.

[0054] It should be noted that, in this embodiment, the N first conductive parts 311 and the N second conductive parts 312 are evenly distributed on the two mounting surfaces 221 of the retaining wall portion 22. That is, N / 2 of the first conductive parts 311 and N / 2 of the second conductive parts 312 are located on one of the mounting surfaces 221, while the other N / 2 of the first conductive parts 311 and N / 2 of the second conductive parts 312 are located on the other mounting surface 221. The spanning portion 313 is electrically coupled to the first side segment 3112 of the adjacent N / 2 first conductive parts 311 and the second side segment 3122 of the N / 2 second conductive parts 312. However, the present invention is not limited to this.

[0055] For example, in other embodiments of the present invention not shown, the N first conductive portions 311 and the N second conductive portions 312 may be disposed on the two mounting surfaces 221 in an uneven manner. For example, N / 4 of the first conductive portions 311 and N / 4 of the second conductive portions 312 may be located on one of the mounting surfaces 221, while the other 3N / 4 of the first conductive portions 311 and 3N / 4 of the second conductive portions 312 may be located on the other mounting surface 221. The spanning portion 313 may be electrically coupled to the first side segment 3112 of the adjacent N / 4th first conductive portion 311 and the second side segment 3122 of the 3N / 4th second conductive portion 312.

[0056] To give another example, in other embodiments of the present invention not shown, the N first conductive portions 311 and the N second conductive portions 312 may be disposed on one of the disposed surfaces 221, and the spanning portion 313 is omitted.

[0057] Furthermore, it can be understood that the second body 31 is a copper coil composed of N U-shaped first conductive parts 311 and N second conductive parts 312 stacked together and connected by the cross portion 313. That is, when the second body 31 is unfolded, it forms a continuous S-shaped linear structure through the aforementioned N first conductive parts 311, N second conductive parts 312, and cross portion 313 (e.g., ...). Figure 10 (As shown).

[0058] It should be noted that, as Figure 11 As shown, in another embodiment, the second body 31 may also adjust the number of the first conductive part 311 and the second conductive part 312, that is, the second body 31 has only one first conductive part 311 and one second conductive part 312 in addition to the cross part 313.

[0059] Cooperate Figure 9 and Figure 10 As shown, the two connectors 32 in this embodiment have a generally L-shaped linear structure and are integrally formed by extending the second body 31. However, the present invention is not limited to this; for example, the two connectors 32 and the second body 31 may be separate and independent components. The two connectors 32 are located on both sides of the cover portion 21 (i.e., the two mounting surfaces 221), and the two connectors 32 respectively connect the first side segment 3112 and the second side segment 3122 that are furthest apart from each other, so that the two connectors 32 are located on both sides of the second body 31.

[0060] That is, one of the connectors 32 is stacked on the first first conductive portion 311 and electrically coupled to its first side segment 3112; the other connector is stacked on the Nth second conductive portion 312, and the aforementioned other connector 32 is electrically coupled to the second side segment 3122 of the Nth second conductive portion 312.

[0061] In addition, in conjunction with Figure 5 , Figure 9 ,and Figure 10 When the two connectors 32 are respectively connected to the first side segment 3112 and the second side segment 3122 that are furthest apart from each other, the N first conductive parts 311, the N second conductive parts 312, and the two connectors 32 can surround and form a second adapter hole H3, and the second adapter hole H3 can be positioned corresponding to the through hole H21 of the cover part 21 and the first adapter hole H11 of the first body 11, that is, the second body 31 has the second adapter hole H3.

[0062] It is worth noting that the height of the two connectors 32 and the second body 31 along the thickness direction D3 is preferably not greater than the height of the retaining wall portion 22 along the thickness direction D3, which allows the two connectors 32 and the second body 31 to be separated from the plurality of conductive elements 12 located on the first body 11.

[0063] Cooperate Figure 3 , Figure 5 and Figure 6 As shown, the magnetic component 4 in this embodiment is made of a magnetically conductive but non-conductive material, and includes a pillar 41 and two plates 42 connecting the two ends of the pillar 41. The pillar 41 is cylindrical and is disposed in the first adapter hole H11, the second adapter hole H3, and the through hole H21, and the two ends of the pillar 41 are exposed outside the second adapter hole H3.

[0064] like Figure 3As shown, the two plates 42 are respectively connected to the two ends of the column block 41, so that the two plates 42 can cover the two sides of the second coil assembly 3 along the thickness direction D3. That is, the two plates 42 are spaced apart from each other along the thickness direction D3, so that the two plates 42 form an opening K at the end of the covering part 21 away from the retaining wall part 22 (e.g., Figure 1 (as shown), and the opening K allows the two connectors 32 and the span 313 to be exposed on the outside of the two plates 42.

[0065] In practice, such as Figure 1 and Figure 4 As shown, the height E4 of the two plates 42 and the column block 41 (i.e., the magnetic component 4) along the thickness direction D3 preferably does not exceed the height E22 of the retaining wall portion 22 along the thickness direction D3, and the length L42 of the two plates 42 along the width direction D2 preferably does not exceed the length L22 of the retaining wall portion 22 along the width direction D2. In other words, the area of ​​the magnetic component 4 projected onto the retaining wall portion 22 is entirely located on the retaining wall portion 22, which allows the magnetic component 4 to be separated from the plurality of conductive elements 12 located on the first body 11.

[0066] It is particularly important to note that the magnetic induction structure 100 of the present invention, under the above-described structure, must satisfy the following technical features to ensure that the magnetic induction structure 100 can meet safety standards with the lowest manufacturing cost. Specifically, in conjunction with Figure 12 As shown, the magnetic component 4 and the second coil component 3 are defined as a spacing target A, and each of the conductive elements 12 and at least one of the through holes 13 has a shortest distance to the spacing target A, and the shortest distance is preferably not less than 0.4 millimeters (mm); wherein the aforementioned shortest distance refers to the electrical clearance or creepage distance.

[0067] Furthermore, electrical clearance refers to the shortest distance measured in air between two adjacent conductors (e.g., at least one of the through holes 13 and the second coil assembly 3) or between a conductor and the surface of an adjacent motor housing (e.g., the surface of any of the conductive elements 12 and the magnetic assembly 4), that is, the shortest distance through which insulation can be achieved.

[0068] Creepage distance refers to the shortest distance measured along the insulating surface between two adjacent conductors (e.g., either of the conductive elements 12 and the second coil assembly 3) or between a conductor and the surface of an adjacent motor housing (e.g., at least one of the through holes 13 and the surface of the insulating unit 2). In other words, the radius of the area where the insulating material around the conductor is polarized, resulting in the insulating material exhibiting a charged phenomenon, is the creepage distance.

[0069] It should be noted that the actual application of electrical clearance and creepage distance (i.e., the shortest distance) are terms known to those skilled in the art, and therefore the actual distance calculation of the magnetic induction structure 100 will not be described in detail here.

[0070] [Second Embodiment]

[0071] like Figure 13 As shown, this is the second embodiment of the present invention. The magnetic induction structure 100' in this embodiment is similar to the magnetic induction structure 100 in the first embodiment described above. The similarities between the two embodiments will not be repeated. The main difference between the magnetic induction structure 100' in this embodiment and the first embodiment is that:

[0072] In this embodiment, the second coil assembly 3' consists of two printed circuit board coils electrically coupled to each other. Specifically, the second coil assembly 3' includes a second body 31' and two connectors 32' connecting the second body 31'.

[0073] The second body 31' includes two sub-circuit boards 314 and at least one spanning member 315 electrically coupled to the two sub-circuit boards 314. Each of the two sub-circuit boards 314 is a printed circuit board coil, and the two sub-circuit boards 314 are respectively disposed on the two mounting surfaces 221 of the insulating unit 2. That is, each sub-circuit board 314 has an insulating carrier 3141, a plurality of coils (not shown) embedded in the insulating carrier 3141, and at least one via hole 3142 electrically coupled to the plurality of coils.

[0074] In more detail, the insulating carrier 3141 of each sub-circuit board 314 in this embodiment is a plate-like structure, and the area of ​​the wide side surface W3141 of the insulating carrier 3141 is approximately equal to the area of ​​the wide side surface W21 of the cover portion 21. The insulating carrier 3141 of each sub-circuit board 314 has an opening H3141 corresponding to the first adapter hole H11, that is, two openings H3141 form the second adapter hole H3. A plurality of coils are printed inside the insulating carrier 3141, and the plurality of coils are electrically coupled to each other through at least one through-hole 3142.

[0075] At least one of the cross members 315 is a conductive structure; in this embodiment, it is exemplified by a pin, but the invention is not limited thereto. At least one cross member 315 is located at the narrow edge N21 of the cover portion 21 away from the extension portion 112, i.e., at the location of the opening K, exposed outside the two plates 42, and both ends of the cross member 315 can be electrically coupled to the two sub-circuit boards 314. The cross member 315 can be electrically coupled to either sub-circuit board 314 by directly passing through the insulating carrier 3141 to electrically couple multiple coils, electrically couple to at least one of the through holes 3142 exposed on the insulating carrier 3141, or electrically couple to a gold finger further formed on the sub-circuit board 314.

[0076] It should be noted that each of the sub-circuit boards can perform electromagnetic induction through its insulating carrier 3141, multiple coils, and at least one through hole 3142. However, the method of achieving electromagnetic induction is prior art and not the focus of this invention, so it will not be described in detail here.

[0077] The two connectors 32' are respectively disposed on the two sub-circuit boards 314, and in this embodiment, the two connectors 32' are located at positions on the two sub-circuit boards 314 corresponding to the opening K, that is, the two connectors 32' can be electrically coupled to the electronic device through the opening K. In this embodiment, the two connectors 32' are gold fingers as an example, and are located on the side of the two sub-circuit boards 314 that are far apart from each other, but the present invention is not limited thereto.

[0078] [Technical Effects of the Embodiments of the Invention]

[0079] In summary, the magnetic induction structure disclosed in the embodiments of the present invention can achieve safety standards at the lowest manufacturing cost through the design of "the insulating unit covers at least one of the through holes and the first adapter hole, and the second body straddles the covering portion of the insulating unit" and "any of the conductive elements and any of the through holes of the first coil assembly have a shortest distance to the spacing target, and the shortest distance is not less than 0.4 mm".

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. All equivalent changes and modifications made in accordance with the claims of the present invention shall fall within the scope of protection of the claims of the present invention.

Claims

1. A magnetic induction structure, characterized by, The magnetic induction structure includes: A first coil assembly includes a first body, a plurality of conductive elements, at least one through hole, and a plurality of conductive coils. The plurality of conductive coils are embedded in the first body and electrically coupled to each other through at least one through hole. The first body has an extension and a main body. The first body has a first adapter hole in the main body. The plurality of conductive elements are disposed in the extension, and at least one through hole is disposed in the main body. The plurality of conductive elements and the at least one through hole are electrically coupled to the plurality of conductive coils. An insulating unit, covering a portion of the first coil assembly, the insulating unit comprising: A cover portion, covering at least one of the through holes and the first adapter hole, and the extension portion exposed on the outside of the cover portion, the cover portion having a mounting surface on each side; and A retaining wall portion is formed by extending one end of the covering portion along a thickness direction of the first body; and A second coil assembly is disposed on the insulating unit. The second coil assembly includes a second body and two connectors connecting the second body. The second body spans the cover portion, such that the two connectors are respectively located on the two mounting surfaces. The second body has a second adapter hole whose position corresponds to the first adapter hole. A magnetic component, comprising: A column block is disposed within the first adapter hole and the second adapter hole; and Two plates connect the two ends of the column block and cover the two sides of the second coil assembly along the thickness direction, and the two plates form an opening at the end of the cover away from the retaining wall, the opening allowing the two connectors to be exposed on the outside of the two plates; The magnetic component and the second coil component are defined as a spacing target, and each of the conductive elements and at least one of the through holes has a shortest distance to the spacing target, and the shortest distance is not less than 0.4 mm.

2. The magnetic induction structure of claim 1, wherein The shortest distance is the electrical clearance or creepage distance.

3. The magnetic induction structure according to claim 1, characterized in that, The second body includes: A first conductive portion having a first middle section and two first side sections connecting the first middle section, wherein one of the first side sections is electrically coupled to one of the connectors; and A second conductive portion having a second middle section and two second side sections connecting the second middle section, the two second side sections being perpendicular to the two first side sections, and one of the second side sections being electrically coupled to the other first side section, and the other second side section being electrically coupled to another connector; The first conductive part, the second conductive part, and the two connecting members surround each other to form the second adapter hole.

4. The magnetic induction structure according to claim 1, characterized in that, The second body includes: N first conductive portions are arranged vertically spaced from each other, each first conductive portion having a first middle section and two first side sections connecting the first middle section; and N second conductive portions are disposed between two adjacent first conductive portions. Each second conductive portion has a second middle section and two second side sections connecting the second middle section. The two second side sections are perpendicular to the two first side sections, and the two second side sections of each second conductive portion are electrically coupled to one of the first side sections of the two adjacent first conductive portions. In the first side segment and the second side segment that are furthest apart from each other, the first side segment is electrically coupled to one of the connectors, and the second side segment is electrically coupled to the other connector; The second adapter hole is formed by surrounding N first conductive parts, N second conductive parts, and two connecting members. Where N is a positive even number not less than 2.

5. The magnetic induction structure according to claim 3 or 4, characterized in that, The second body further includes a transverse portion, the two ends of which are electrically coupled to the first side segment of the first conductive portion and the second side segment of the second conductive portion, which are closest to each other, and the transverse portion is located at the opening and exposed on the outside of the two plates, and the length of the transverse portion is not less than the height of the covering portion along the thickness direction.

6. The magnetic induction structure according to claim 4, characterized in that, N first conductive parts and N second conductive parts are evenly distributed on the two mounting surfaces.

7. The magnetic induction structure according to claim 1, characterized in that, The first body is a printed circuit board coil, and the second body is a copper sheet coil or a printed circuit board coil.

8. The magnetic induction structure according to claim 1, characterized in that, The area of ​​a wide side of the retaining wall portion is larger than the area of ​​a narrow edge of the extension portion.

9. The magnetic induction structure according to claim 1, characterized in that, The second body includes: Two sub-circuit boards, comprising: An insulating carrier; Multiple coils are embedded within the insulating carrier; and At least one via electrically coupled to a plurality of the coils; and At least one spanner is located at the opening and exposed on the outside of the two said plates, and at least one of the spanners is electrically coupled to the two said sub-circuit boards.

10. The magnetic induction structure according to claim 9, characterized in that, The area of ​​a wide side of the insulating carrier of each sub-circuit board is equal to the area of ​​a wide side of the main body, and the insulating carrier of each sub-circuit board has an opening corresponding to the first adapter hole.

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