TWI761287B - Magnetic induction structure - Google Patents

Abstract

A magnetic induction structure is provided. The magnetic induction structure includes a first coil component, an insulating unit, a second coil component, and a magnetic component. The insulating unit covers a part of the first coil component, so as to expose an end of the first coil component. The second coil component straddles the insulating unit, so that the second coil component can be located on both sides of the insulating unit. The magnetic component passes through the first coil component, the insulating unit, and the second coil component. The magnetic component and the second coil component are defined as an interval target, and a shortest distance between any conductive element and any via hole of the first coil assembly and the interval target is greater than or equal to 0.4 mm. Accordingly, the magnetic induction structure can meet safety specifications at the lowest production cost.

Description

Magnetic induction structure

The present invention relates to an induction structure, in particular to a magnetic induction structure.

In order to meet the safety distance stipulated by safety regulations, the existing magnetic induction structures (such as flat-panel transformers) mostly use blind holes and buried holes for their printed circuit board coils (PCBs). However, the manufacturing process of blind vias and buried vias is relatively complicated, that is, the cost is high, which makes the overall cost of the magnetic induction structure remain high in order to comply with safety regulations.

Therefore, the inventor believes that the above-mentioned defects can be improved. Nate has devoted himself to research and application of scientific principles, and finally proposes an invention with reasonable design and effective improvement of the above-mentioned defects.

The technical problem to be solved by the present invention is to provide a magnetic induction structure in view of the deficiencies of the prior art, which can effectively improve the possible defects of the existing magnetic induction structure.

The embodiment of the present invention discloses a magnetic induction structure, which includes: a first coil component, including a first body, a plurality of conductive parts, at least one via hole, and a plurality of conductive coils, a plurality of the conductive coils embedded in the first body and electrically coupled to each other through at least one of the via holes, the first body has an extension part and a main body part, the first body has a main body part a first fitting hole, a plurality of the conductive parts are disposed in the extension part, at least one of the conductive holes is disposed in the main body part, and a plurality of the conductive parts are electrically coupled to the at least one of the conductive holes a plurality of the conducting coils; an insulating unit covering part of the first coil assembly, the insulating unit comprising: a covering part covering at least one of the conducting holes and the first fitting hole, and The extension part is exposed on the outer side of the covering part, and both sides of the covering part have a setting surface; extending and forming; and a second coil assembly disposed on the insulating unit, the second coil assembly comprising a second body and two connecting pieces connecting the second body, the second body straddling On the covering part, the two connecting pieces are respectively located on the two setting surfaces, and the second body has a second fitting hole corresponding to the first fitting hole; and a magnetic The assembly includes: a column block, disposed in the first adapter hole and the second adapter hole; and two plates, connecting the two ends of the column block and covering the second coil assembly along the The two sides in the thickness direction, and the two plates form an opening at one end of the covering part away from the retaining wall part, and the opening can enable the two connectors to be exposed on the outside of the two plates ; wherein, the magnetic component and the second coil component are defined as an interval target, and any one of the conductive members and at least one of the via holes has a shortest distance from the interval target, and the shortest distance Not less than 0.4 millimeters (mm).

To sum up, the magnetic induction structure disclosed in the embodiment of the present invention can cover at least one of the through hole and the first fitting hole by the insulating unit, and the second body can straddle the "On the covering part of the insulating unit" and "Any one of the conductive parts and any one of the via holes of the first coil assembly has a shortest distance to the distance target, and the shortest distance is not less than 0.4 cm. The design of millimeter (mm)” enables the magnetic induction structure to meet safety specifications with the lowest manufacturing cost.

For a further understanding of the features and technical content of the present invention, please refer to the following detailed descriptions and drawings of the present invention. However, the drawings provided are only for reference and description, and are not intended to limit the present invention.

The following are specific embodiments to illustrate the implementation of the "magnetic induction structure" disclosed in the present invention, and those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present 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 the present invention. In addition, the drawings of the present invention are merely schematic illustrations, and are not drawn according to the actual size, and are stated in advance. The following embodiments will further describe the related technical contents of the present invention in detail, but the disclosed contents are not intended to limit the protection scope of the present invention.

It should be understood that although terms such as "first", "second" and "third" may be used herein to describe various elements or signals, these elements or signals should not be limited by these terms. These terms are primarily used to distinguish one element from another element, or a signal from another signal. In addition, the term "or", as used herein, should include any one or a combination of more of the associated listed items, as the case may be.

[First Embodiment]

Referring to FIG. 1 to FIG. 12 , the present embodiment provides a magnetic induction structure 100 . As shown in FIG. 1 and FIG. 2 , the magnetic induction structure 100 includes a first coil component 1 , an insulating unit 2 covering a part of the first coil component 1 , and a second insulating unit 2 disposed on the insulating unit 2 . The coil component 3 and a magnetic component 4 passing through the first coil component 1 , the insulating unit 2 and the second coil component 3 . The first coil assembly 1 and the second coil assembly 3 can be used as the primary side and the secondary side of the magnetic induction structure 100 respectively, so that the magnetic induction structure 100 can achieve the purpose of adjusting the voltage.

As shown in FIG. 5 to FIG. 7 , the first coil assembly 1 includes a first body 11 , a plurality of conductive members 12 and a plurality of via holes 13 disposed on the first body 11 , and A plurality of conductive rings (not shown in the figure) are embedded in the first body 11 .

As shown in FIG. 7 , the first body 11 is a printed circuit board coil (ie, PCB) with a plate-like structure, and the first body 11 has a length direction D1 and a width direction perpendicular to the length direction D1 D2, and a thickness direction D3 perpendicular to the length direction D1 and the width direction D2. Wherein, the length direction D1 and the width direction D2 are the extension directions of the long side and the wide side of the wide side W11 of the first body 11 , and the thickness direction D3 is the first body 11 (connecting two The extension direction of the short side of the narrow edge N11 of the wide side surface W11).

The first body 11 is embedded with a plurality of the conductive rings (not shown in the figure) formed by printing layout, and the first body 11 has a main body 111 connected to the main body 111 . an extension part 112 of the main body part 111 and a first fitting hole H11 on the main body part 111 .

Further, the main body portion 111 is substantially rectangular in this embodiment, but the present invention is not limited thereto. The extension portion 112 is formed by extending from one end of the main body portion 111 in a direction away from the first fitting hole H11 , and the extension portion 112 and the main body portion 111 are spaced apart from each other by a distance, so that the extension portion A groove G can be formed between 112 and the main body portion 111 , but the present invention is not limited thereto. For example, in other not-shown embodiments of the present invention, the first body 11 may also omit the above-mentioned groove G.

In a preferred embodiment, as shown in FIGS. 4 and 7 , the length L112 of the extending portion 112 along the width direction D2 is greater than the length L111 of the main portion 111 along the width direction D2, so that all parts of The extension portion 112 can protrude from the main body portion 111 , that is, the orthographic projection area of the main body portion 111 toward the extension portion 112 can only cover part of the side surface of the extension portion 112 facing the main body portion 111 . .

As shown in FIG. 7 , a plurality of the conductive members 12 are disposed on the extension portion 112 , and the plurality of the conductive members 12 are electrically coupled to the plurality of the conductive rings ( not shown in the figure). In this embodiment, the plurality of conductive members 12 may be gold fingers located on the aforementioned protruding extension portion 112 , but the present invention is not limited thereto.

In practice, the positions and types of the plurality of the conductive members 12 can be adjusted reasonably according to the design requirements, for example, the plurality of the conductive members 12 are replaced by via holes or pins, or The conductive member 12 , which is a gold finger, covers the entire extension portion 112 .

As shown in FIG. 7 , at least one of the via holes 13 is disposed in a region of the main body portion 111 adjacent to the first fitting hole H11 , and at least one of the via holes 13 is electrically coupled to the first body portion A plurality of said conducting rings in 11 (not shown in the figure).

It should be noted that, the first coil assembly 1 can pass through a plurality of the conductive coils, a plurality of the conductive members 12 , and at least one of the conductive holes 13 , so that the first coil assembly 1 can have electromagnetic induction effect. Wherein, the first coil assembly 1 realizes electromagnetic induction through a plurality of the conductive coils, a plurality of the conductive members 12, and at least one of the conductive holes 13, which is the prior art and is not the technical focus of the present invention. Therefore, it is not particularly detailed here.

As shown in FIG. 5 and FIG. 8 , in this embodiment, the insulating unit 2 covers a part of the first coil assembly 1 by injection molding, and the insulating unit 2 is integrally formed with a covering portion 21 and a connection A retaining wall portion 22 of the covering portion 21 .

Specifically, as shown in FIG. 8 , the cover portion 21 covers the outer edge of the main body portion 111 , so that the extension portion 112 is exposed outside the cover portion 21 , that is, at least one of the via holes 13 and the first fitting hole H11 are covered by the covering portion 21 . The cover portion 21 has a through hole H21 corresponding to the first fitting hole H11 , and two setting surfaces 221 (ie, wide side surfaces) corresponding to opposite sides of the main body portion 111 respectively.

The retaining wall portion 22 is formed to extend from one end of the covering portion 21 (adjacent to the extending portion 112 ) along the thickness direction D3 (ie, the vertical direction in FIG. 8 ), and the position of the retaining wall portion 22 is The position corresponds to the position of the groove G (as shown in Figure 2). In another way, the blocking wall portion 22 and the covering portion 21 are each a rectangular plate-like structure in this embodiment, and the blocking wall portion 22 is perpendicular to the covering portion 21 .

It should be noted that, as shown in FIG. 8 , the area of the wide side W22 of the blocking wall portion 22 is larger than the area of the narrow edge N112 of the extending portion 112 , that is, the extending portion 112 is projected on the blocking portion 112 . The area of the wall portion 22 is located on the wide side W22 of the blocking wall portion 22 , which enables the plurality of the conductive members 12 located on the extending portion 112 to separate the main body through the blocking wall portion 22 part 111 , the second coil component 3 , and the magnetic component 4 (which will be further described later).

As shown in FIG. 5 , FIG. 9 , and FIG. 10 , the second coil assembly 3 includes a second body 31 and two connecting pieces 32 connecting the second body 31 , and the second body 31 and the two In this embodiment, each of the connecting pieces 32 is a single component integrally connected, but the present invention is not limited thereto. The second body 31 straddles the covering portion 21 so that the two connecting members 32 can be located on the two setting surfaces 221 respectively, so as to be used for electrically coupling an electronic device (not shown in the figure). ).

In detail, the second body 31 is a copper sheet coil in this embodiment, and includes N first conductive parts 311 and N second conductive parts 312 staggered up and down, and connected to the adjacent first conductive parts 311 . A conductive portion 311 and a cross portion 313 of the second conductive portion 312 ; wherein, N is a positive even number not less than 2.

As shown in FIGS. 9 and 10 , the N first conductive portions 311 are arranged at intervals up and down, and are generally U-shaped and have a first middle section 3111 and two first side sections connecting the first middle section 3111 3112. In this embodiment, the two first side segments 3112 are formed by extending from two ends of the first middle segment 3111 , and the two first side segments 3112 are parallel to each other and perpendicular to the first middle segment 3111 , The two first side sections 3112 and the first middle section 3111 can jointly form a first opening K311, but the invention is not limited thereto. For example, in other not-shown embodiments of the present invention, the included angle between each of the first side segments 3112 and the first middle segment 3111 is not equal to 90 degrees.

Each of the N second conductive parts 312 is disposed between two adjacent first conductive parts 311 , and each of the second conductive parts 312 is electrically coupled to two adjacent first conductive parts 312 . The conductive parts 311 , that is, the N second conductive parts 312 and the N first conductive parts 311 are arranged alternately up and down.

Wherein, each of the second conductive portions 312 is substantially U-shaped, and has a second middle section 3121 and two second side sections 3122 connected to the second middle section 3121 . In this embodiment, the two second side sections 3122 are formed by extending from two 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 , The two second side sections 3122 and the second middle section 3121 can jointly form a second opening K312, but the invention is not limited to this. For example, in other not-shown embodiments of the present invention, the included angle between each of the second side segments 3122 and the second middle segment 3121 is not equal to 90 degrees.

It is worth mentioning that in the stacked state (as shown in FIG. 9 ) and the unfolded state (as shown in FIG. 10 ) of the second coil assembly 3 , the first conductive parts 311 of the adjacent first conductive parts 311 The direction of the opening K311 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 of the second conductive portions 312 are perpendicular to each of the The two first side segments 3112 of the first conductive portion 311 .

As shown in FIG. 1 and FIG. 5 , in this embodiment, the cross portion 313 is located on the side of the covering portion 21 away from the retaining wall portion 22 (that is, the covering portion 21 is away from the extending portion 112 ) N21), and the length of the spanning portion 313 is preferably not less than the height of the covering portion 21 along the thickness direction D3, the two ends of the spanning portion 313 are electrically coupled to adjacent ones of the The first side segment 3112 of the first conductive portion 311 and the second side segment 3122 of the second conductive portion 312 .

It should be noted that, in this embodiment, the N number of the first conductive parts 311 and the N number of the second conductive parts 312 are evenly arranged on the two installation surfaces of the retaining wall part 22 . 221, 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 setting surfaces 221, and the other N/2 of the first conductive parts 312 A conductive portion 311 and N/2 second conductive portions 312 are located on the other setting surface 221 , and the cross portion 313 is electrically coupled to the adjacent N/2 first first conductive portions 311 . The first side segment 3112 of the conductive portion 311 and the second side segment 3122 of the N/2th second conductive portion 312, but the invention is not limited thereto.

For example, in other non-illustrated embodiments of the present invention, the N first conductive parts 311 and the N second conductive parts 312 may be disposed on the two disposing surfaces 221 in an uneven number. For example, N/4 of the first conductive parts 311 and N/4 of the second conductive parts 312 are located on one of the setting surfaces 221, and the other 3N/4 of the first conductive parts The portion 311 and the 3N/4 second conductive portions 312 are located on the other setting surface 221, and the cross portion 313 can be electrically coupled to the adjacent N/4 first conductive portions 312. The first side segment 3112 of the portion 311 and the second side segment 3122 of the 3N/4th second conductive portion 312 .

For another example, in other not-shown embodiments of the present invention, the N first conductive parts 311 and the N second conductive parts 312 may be disposed on one of the disposing surfaces 221 , and the cross portion 313 is omitted.

In addition, it can be understood that the second body 31 is composed of N first conductive parts 311 and N second conductive parts 312 in a U shape stacked on each other and matched with the cross part 313 Connect the formed copper coils. That is to say, when the second body 31 is spread out, the second body 31 forms a continuous S-shape through the aforementioned N first conductive portions 311 , N second conductive portions 312 , and the cross portion 313 shaped linear structure (as shown in Figure 10).

It should be noted that, as shown in FIG. 11 , in another embodiment, the second body 31 may also adjust the number of the first conductive portion 311 and the second conductive portion 312 , that is, In addition to the cross portion 313 , the second body 31 has only one first conductive portion 311 and one second conductive portion 312 .

As shown in FIG. 9 and FIG. 10 , the two connecting pieces 32 are substantially L-shaped linear structures in this embodiment, and are formed by integrally extending the second body 31 , but the present invention is not subject to the Limited to this, for example, the two connecting pieces 32 and the second body 31 are separate components. The two connecting pieces 32 are respectively located on both sides of the covering portion 21 (ie, the two setting surfaces 221 ), and the two connecting pieces 32 are respectively connected to the first side segments 3112 that are farthest from each other and the second side section 3122 , so that the two connecting pieces 32 are located on both sides of the second body 31 .

That is to say, one of the connecting pieces 32 is stacked on the first one of the first conductive parts 311 and electrically coupled to the first side section 3112 thereof; the other connecting piece is covered by the Nth The second conductive portions 312 are stacked, and the other connecting member 32 is electrically coupled to the second side segment 3122 of the Nth second conductive portion 312 .

In addition, in accordance with FIG. 5 , FIG. 9 , and FIG. 10 , when the two connecting members 32 are respectively connected to the first side segment 3112 and the second side segment 3122 that are farthest from each other, the N pieces of the first conductive The portion 311 , the N second conductive portions 312 , and the two connecting pieces 32 can surround a second fitting hole H3 , and the second fitting hole H3 can be located corresponding to the position of the cover portion 21 . The through hole H21 and the first fitting hole H11 of the first body 11 , that is, the second body 31 has the second fitting hole H3 .

It is worth noting that the heights of the two connecting members 32 and the second body 31 along the thickness direction D3 preferably do not exceed the heights of the retaining wall portion 22 along the thickness direction D3, which makes the two Each of the connecting members 32 and the second body 31 can be separated from the plurality of the conductive members 12 located on the first body 11 .

As shown in FIG. 3 , FIG. 5 and FIG. 6 , the magnetic component 4 is made of magnetically conductive and non-conductive material in this embodiment, and includes a column block 41 and two connecting ends of the column block 41 . Plate 42. The column block 41 is cylindrical and is disposed in the first fitting hole H11, the second fitting hole H3, and the through hole H21, and both ends of the column block 41 are exposed to the first fitting hole H11, the second fitting hole H3, and the through hole H21. 2. The outer side of the fitting hole H3.

As shown in FIG. 3 , the two plates 42 are respectively connected to two ends of the column block 41 , so that the two plates 42 can cover both sides of the second coil assembly 3 along the thickness direction D3 . That is to say, 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 portion 21 away from the retaining wall portion 22 (as shown in FIG. 1 ). shown), and the opening K enables the two connecting pieces 32 and the cross portion 313 to be exposed on the outside of the two plates 42 .

In practice, as shown in FIG. 1 and FIG. 4 , the height E4 of the two blocks 42 and the column block 41 (ie, the magnetic element 4 ) along the thickness direction D3 preferably does not exceed the block The height E22 of the wall portion 22 along the thickness direction D3, and the length L42 of the two panels 42 along the width direction D2 preferably does not exceed the length L22 of the retaining wall portion 22 along the width direction D2. That is to say, the area where the magnetic component 4 is projected onto the blocking wall portion 22 is completely located on the blocking wall portion 22 , which enables the magnetic component 4 to be able to interact with many other components located on the first body 11 . The conductive members 12 are separated from each other.

It should be noted that, under the above structure, the magnetic induction structure 100 of the present invention must meet the following technical characteristics, so as to ensure that the magnetic induction structure 100 can meet the safety specification with the lowest manufacturing cost. Specifically, as shown in FIG. 12 , the magnetic component 4 and the second coil component 3 are defined as an interval target A, and any one of the conductive members 12 and at least one of the through holes 13 is connected to the The distance between the target A has a shortest distance, and the shortest distance is preferably not less than 0.4 millimeters (mm); wherein, the shortest distance refers to an electrical clearance (clearance) or a creepage distance (creepage distance).

Further, the electrical clearance refers to: two adjacent conductors (for example: at least one of the through holes 13 and the second coil assembly 3 ) or one conductor and the surface of the adjacent motor casing (for example: any one The shortest distance between the conductive member 12 and the surface of the magnetic component 4) measured along the air, that is, the shortest distance that can be insulated by air.

Creepage distance refers to: two adjacent conductors (for example: any one of the conductive parts 12 and the second coil assembly 3 ) or one conductor and the surface of the adjacent motor casing (for example: at least one of the via holes) 13 and the surface of the insulating unit 2), the shortest distance measured along the insulating surface, that is, the radius of the area where the insulating material around the conductor is electrically polarized, causing the insulating material to exhibit a charged phenomenon, that is, the creepage distance.

It should be noted that the actual application of the electrical clearance and the creepage distance (ie, the shortest distance) are terms known to those of ordinary knowledge in the art, so the actual application of the magnetic induction structure 100 will not be described in detail here. distance calculation.

[Second Embodiment]

As shown in FIG. 13 , which is the second embodiment of the present invention, the magnetic induction structure 100 ′ of this embodiment is similar to the magnetic induction structure 100 of the above-mentioned first embodiment. The differences between the magnetic induction structure 100 ′ of this embodiment and the first embodiment are mainly as follows:

In this embodiment, the second coil assembly 3' is two printed circuit board coils that are electrically coupled to each other. Specifically, a second body 31' of the second coil assembly 3' and two connecting pieces 32' connecting the second body 31'.

The second body 31' includes two sub-circuit boards 314 and at least one cross member 315 electrically coupled to the two sub-circuit boards 314. Wherein, the two sub-circuit boards 314 are respectively printed circuit board coils, and the two sub-circuit boards 314 are respectively disposed on the two setting surfaces 221 of the insulating unit 2, that is, each The 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 (via hole) electrically coupled to the plurality of the coils. .

In more detail, the insulating carrier 3141 of each of the sub-circuit boards 314 is a plate-like structure in this embodiment, and the area of the wide side W3141 of the insulating carrier 3141 is the same as the width of the covering portion 21 . The areas of the side surfaces W21 are substantially equal. The insulating carrier 3141 of each of the sub-circuit boards 314 has an opening H3141 corresponding to the first fitting hole H11 , that is, two of the openings H3141 form the second fitting hole H3 . A plurality of the coils are formed inside the insulating carrier 3141 in a layout, and the plurality of coils are electrically coupled to each other through at least one of the through holes 3142 .

At least one of the cross members 315 is a conductive structure. In this embodiment, a guide pin (Pin) is used as an example, but the present invention is not limited thereto. At least one of the cross pieces 315 is located at the narrow edge N21 of the cover part 21 away from the extension part 112 , that is, at the position of the opening K and is exposed outside the two plates 42 , and the cross piece 315 is Two ends of the span member 315 can be electrically coupled to the two sub-circuit boards 314 . Wherein, the cross member 315 can be electrically coupled to any one of the sub-circuit boards 314 by directly passing through the insulating carrier 3141 to be electrically coupled to a plurality of the coils, and electrically coupled to be exposed to the insulation. At least one of the through holes 3142 of the carrier 3141 or a gold finger further formed by being electrically coupled to the sub-circuit board 314 .

It should be noted that, each of the sub-circuit boards can have the effect of electromagnetic induction through its insulating carrier 3141 , a plurality of the coils, and at least one of the through holes 3142 . However, the way of realizing electromagnetic induction is the prior art and is not the technical focus of the present invention, so it will not be described in detail here.

The two connecting members 32 ′ are respectively disposed on the two sub-circuit boards 314 , and the two connecting members 32 ′ are located in the openings corresponding to the two sub-circuit boards 314 in this embodiment. The position of K, that is, the two connectors 32 ′ can be electrically coupled to the electronic device through the opening K. In this embodiment, the two connecting members 32' are gold fingers as an example, and are located on one side of the two sub-circuit boards 314 away from each other, but the invention is not limited thereto.

[Technical effects of the embodiments of the present invention]

To sum up, the magnetic induction structure disclosed in the embodiment of the present invention can cover at least one of the through hole and the first fitting hole by the insulating unit, and the second body can straddle the "On the covering part of the insulating unit" and "Any one of the conductive parts and any one of the via holes of the first coil assembly has a shortest distance to the distance target, and the shortest distance is not less than 0.4 cm. The design of millimeter (mm)” enables the magnetic induction structure to meet safety specifications with the lowest manufacturing cost.

The contents disclosed above are only preferred feasible embodiments of the present invention, and are not intended to limit the scope of the present invention. Therefore, any equivalent technical changes made by using the contents of the description and drawings of the present invention are included in the application of the present invention. within the scope of the patent.

100, 100': Magnetic induction structure 1: The first coil assembly 11: The first body 111: main body 112: Extensions 12: Conductive parts 13: Via hole 2: Insulation unit 21: Covering Department 22: Retaining Wall Department 221: set face 3, 3': The second coil assembly 31, 31': the second body 311: first conductive part 3111: First middle section 3112: First side segment 312: Second conductive part 3121: Second middle section 3122: Second side segment 313: Cross Department 314: Daughter board 3141: Insulating Carrier 3142: Via hole 315: Across Pieces 32, 32': connector 4: Magnetic components 41: Column block 42: Plate D1: length direction D2: Width direction D3: Thickness direction G: Groove H11: The first adapter hole H3: The second adapter hole H21: Perforation H3141: Opening K: open A: Interval target K311: The first opening K312: Second Opening W11, W22, W21, W3141: Wide side N11, N112, N21: Narrow edges E22, E4: height L112, L111, L42, L22: Length

FIG. 1 is a three-dimensional schematic diagram of a magnetic induction structure according to a first embodiment of the present invention.

FIG. 2 is a schematic perspective view of the magnetic induction structure according to the first embodiment of the present invention from another perspective.

3 is a schematic side view of the magnetic induction structure according to the first embodiment of the present invention.

FIG. 4 is a schematic top view of the magnetic induction structure according to the first embodiment of the present invention.

FIG. 5 is an exploded schematic diagram of the magnetic induction structure according to the first embodiment of the present invention.

FIG. 6 is an exploded schematic view of the magnetic induction structure according to the first embodiment of the present invention from another perspective.

FIG. 7 is a schematic perspective view of the first coil assembly according to the first embodiment of the present invention.

FIG. 8 is a three-dimensional schematic diagram of the insulating unit disposed on the first coil assembly according to the first embodiment of the present invention.

FIG. 9 is a schematic perspective view of the second coil assembly according to the first embodiment of the present invention.

FIG. 10 is a three-dimensional schematic diagram of the second coil assembly when the first embodiment of the present invention is unfolded.

FIG. 11 is a schematic perspective view of the second coil assembly of another aspect of the first embodiment of the present invention when it is unfolded.

FIG. 12 is a schematic cross-sectional view along the line XII-XII of FIG. 1 .

FIG. 13 is an exploded schematic view of the magnetic induction structure according to the second embodiment of the present invention.

100: Magnetic induction structure

1: The first coil assembly

2: Insulation unit

3: Second coil assembly

4: Magnetic components

D1: length direction

D2: Width direction

D3: Thickness direction

K: open

N21: Narrow edge

W22: Wide side

Claims (10)

A magnetic induction structure, comprising: A first coil assembly includes a first body, a plurality of conductive parts, at least one via hole, and a plurality of conductive rings, the plurality of conductive rings are embedded in the first body, and pass through At least one of the through holes is electrically coupled to each other, the first body has an extension part and a main body part, the first body has a first fitting hole in the main body part, a plurality of the conductive parts is disposed on the extension portion, at least one of the through holes is disposed in the main body portion, and a plurality of the conductive members and the at least one through hole are electrically coupled to the plurality of the conductive rings; an insulating unit covering a part of the first coil assembly, the insulating unit comprising: a cover part covering at least one of the through hole and the first fitting hole, the extension part is exposed outside the cover part, and each side of the cover part has a setting surface; and a retaining wall portion 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 connecting pieces connected to the second body, the second body straddles the covering portion the two connecting pieces are respectively located on the two setting surfaces, and the second body has a second fitting hole corresponding to the first fitting hole; and A magnetic assembly, comprising: a column block disposed in the first fitting hole and the second fitting hole; and Two plates are connected to both ends of the column block and cover both sides of the second coil assembly along the thickness direction, and the two plates form a an opening, the opening enables the two connecting pieces to be exposed on the outside of the two plates; Wherein, the magnetic component and the second coil component are defined as an interval target, and any one of the conductive members and at least one of the via holes has a shortest distance from the interval target, and the shortest distance is not less than 0.4 millimeters (mm). The magnetic induction structure according to claim 1, wherein the shortest distance is an electrical clearance (clearance) or a creepage distance (creepage distance). The magnetic induction structure of claim 1, wherein 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 connecting pieces; and a second conductive part, having a second middle section and two second side sections connected to the second middle section, the two second side sections are perpendicular to the two first side sections, and one of the first side sections The two side segments are electrically coupled to the other first side segment, and the other second side segment is electrically coupled to the other connection member; Wherein, the first conductive portion, the second conductive portion, and the two connecting pieces are surrounded to form the second fitting hole. The magnetic induction structure of claim 1, wherein the second body comprises: N first conductive parts are arranged at intervals up and down from each other, each of the first conductive parts has a first middle section and two first side sections connecting the first middle section; and N second conductive parts, each disposed between two adjacent first conductive parts, each of the second conductive parts has a second middle section and two second sides connected to the second middle section The two second side segments are perpendicular to the two first side segments, and the two second side segments of each of the second conductive parts are respectively electrically coupled to two adjacent ones of the second side segments. one of the first side segments of the first conductive portion; Wherein, in the first side segment and the second side segment farthest from each other, the first side segment is electrically coupled to one of the connecting elements, and the second side segment is electrically coupled to the other a said connector; Wherein, the N first conductive parts, the N second conductive parts, and the two connecting pieces are surrounded to form the second fitting hole; Among them, N is a positive even number not less than 2. The magnetic induction structure according to claim 3 or 4, wherein the second body further comprises a spanning portion, and two ends of the spanning portion are respectively electrically coupled to the first conductive portions that are most adjacent to each other. The first side segment and the second side segment of the second conductive portion, and the cross portion is located at the position of the opening and is exposed to the outside of the two plates, and the cross portion is exposed. The length is not less than the height of the covering portion in the thickness direction. The magnetic induction structure according to claim 4, wherein the N number of the first conductive parts and the N number of the second conductive parts are evenly arranged on the two installation surfaces. The magnetic induction structure according to claim 1, wherein the first body is a printed circuit board coil, and the second body is a copper sheet coil or a printed circuit board coil. The magnetic induction structure of claim 1, wherein an area of a wide side of the retaining wall portion is larger than an area of a narrow edge of the extension portion. The magnetic induction structure of claim 1, wherein the second body comprises: Two daughter boards, containing: 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 cross piece is located at the position of the opening and is exposed outside the two plates, and the at least one cross piece is electrically coupled to the two sub-circuit boards. The magnetic induction structure of claim 9, wherein an area of a wide side of the insulating carrier of each of the sub-circuit boards is equal to an area of a wide side of the main body, and each of the sub-circuits The insulating carrier of the board has an opening corresponding to the first fitting hole.

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