CN214505172U

CN214505172U - Magnetic core structure

Info

Publication number: CN214505172U
Application number: CN202120553425.0U
Authority: CN
Inventors: 贺家雄; 梁景伟; 张凯崎
Original assignee: Linkcom Manufacturing Co Ltd
Current assignee: Linkcom Manufacturing Co Ltd
Priority date: 2021-03-17
Filing date: 2021-03-17
Publication date: 2021-10-26
Anticipated expiration: 2031-03-17

Abstract

The utility model discloses a magnetic core structure. The magnetic core structure comprises a magnetic core plate, a magnetic core body arranged on the magnetic core plate and N coils arranged on the magnetic core body. The magnetic core body is provided with a center pillar, two side pillars arranged on the center pillar and two conductive units arranged on the two side pillars. Each side column is provided with a connecting part and two convex parts, and the two convex parts are connected with the two sides of the connecting part. The connecting part is provided with two first arranging surfaces which are connected with each other, and each protruding part is provided with three second arranging surfaces which are connected with each other. Each conductive unit is provided with two first conductive plating layers and N second conductive plating layers. Each first conductive plating layer is arranged on the three second arrangement surfaces. Each second conductive plating layer is arranged on the two first arrangement surfaces. Accordingly, the magnetic core structure has the effects of improving reliability and facilitating manufacturing through the structure.

Description

Magnetic core structure

Technical Field

The utility model relates to a magnetic core structure especially relates to a can promote the magnetic core structure of reliability and convenient making.

Background

The existing magnetic core structure is composed of a cover plate, a body arranged on the cover plate, a plurality of conductive pieces arranged on the body and a plurality of coils. Specifically, the main body is mostly in an I-shape (or I-shape) structure in practice, the plurality of conductive members are copper sheets and are directly fixed on the main body in an adhering manner, and the plurality of coils are wound on the main body and electrically coupled to the plurality of conductive members, so that the magnetic core structure can be further used as an inductor or a transformer.

However, the conventional magnetic core structure still has many disadvantages, among which disadvantages such as "the plurality of conductive members are easy to be separated from the body due to vibration, resulting in reduced reliability" and "the I-shaped body is not easy to be fixed during manufacturing" are the most urgent and difficult problems to be solved by the conventional magnetic core structure.

Therefore, the present inventors have considered that the above-mentioned defects can be improved, and therefore, they have made an intensive study and use of scientific principles, and finally have proposed a novel and rational design that can effectively improve the above-mentioned defects.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that, not enough to prior art provides a magnetic core structure.

The embodiment of the utility model discloses magnetic core structure, it includes: a magnetic core plate; a magnetic core body, set up in on the magnetic core board, the magnetic core body contains: a center pillar having an extending direction and a width direction perpendicular to the extending direction; the two side columns are respectively connected with two ends of the central column along the extending direction, each side column respectively comprises a connecting part and two protruding parts, the two protruding parts are positioned on one side, away from the magnetic core plate, of the connecting part, the two protruding parts are connected with two ends of the connecting part along the width direction, the connecting part is provided with two first setting surfaces which are connected with each other, and the two protruding parts are respectively provided with three second setting surfaces which are connected with each other; and two conductive units respectively arranged on the two side columns, wherein each conductive unit comprises: the two first conductive coatings are respectively arranged on the three second arrangement surfaces of the two convex parts and can be electrically coupled with a circuit board; the N second conductive plating layers are arranged on the two first arrangement surfaces of the connecting part respectively, are arranged at intervals, and are arranged at intervals with the adjacent first conductive plating layers, wherein N is a positive integer not less than 2; and N coils wound on the central column and respectively provided with two connecting ends, wherein the two connecting ends of the N coils are electrically coupled with the N second conductive coatings of the two conductive units.

Preferably, in any one of the side pillars, lengths of the two projecting portions in the width direction are respectively 8% to 12% of a length of the connecting portion in the width direction.

Preferably, in any one of the side pillars, the two first installation surfaces are located on a side of the connecting portion away from the center pillar and a side of the connecting portion away from the magnetic core plate; in any one of the convex portions, the three second installation surfaces are respectively located on one side of the convex portion away from the connecting portion, one side of the convex portion away from the center pillar, and one side of the convex portion away from the magnetic core plate.

Preferably, the two side posts are each substantially T-shaped.

Preferably, any one of the first conductive plating layers and the adjacent second conductive plating layer are arranged at a predetermined distance at intervals, and the predetermined distance is 7% to 9% of the length of the side pillar corresponding to the position of the predetermined distance along the width direction.

Preferably, the connecting portions of the two side columns and the orthographic projection area of the central column towards the magnetic core plate do not exceed the magnetic core plate.

Preferably, the area of orthographic projection of the two convex parts of the two side columns to the magnetic core plate is positioned outside the magnetic core plate.

Preferably, the magnetic core body has a plurality of grooves on any one of the side posts, and the plurality of grooves are respectively located between the adjacent first conductive plating and the second conductive plating and between the adjacent two second conductive plating.

Preferably, each of the plurality of grooves has a predetermined depth, and the predetermined depth is 26% to 30% of the thickness of the protrusion.

Preferably, in any one of the conductive units and the corresponding side pillar, the N second conductive plating layers and the two first conductive plating layers are arranged at equal intervals.

To sum up, the embodiment of the utility model discloses magnetic core structure can be through "two the bellying is connected the both ends of connecting portion, and make two the side post roughly is T word column structure respectively", "two first electrically conductive cladding material sets up respectively in two the bellying is three the second sets up" and "N" on the face the electrically conductive cladding material of second sets up respectively in two the first design that sets up "on the face makes two side posts that can not only utilize T word form of magnetic core structure are fixed, processing or transport when being favorable to making also can ensure two first electrically conductive cladding material and N the electrically conductive cladding material of second has sufficient adhesive force to be fixed in on the magnetic core body to promote the reliability.

In order to further understand the features and technical contents of the present invention, please refer to the following detailed description and accompanying drawings, which are only used for illustrating the present invention, and do not limit the protection scope of the present invention.

Drawings

Fig. 1 is a schematic perspective view of a magnetic core structure according to a first embodiment of the present invention.

Fig. 2 is an exploded view of the magnetic core structure according to the first embodiment of the present invention.

Fig. 3 is a schematic perspective view of the magnetic core body according to the first embodiment of the present invention after the conductive unit is omitted.

Fig. 4 is a top view of the magnetic core structure of fig. 1.

Fig. 5 is a schematic perspective view of a magnetic core structure according to a second embodiment of the present invention.

Fig. 6 is a top view of the magnetic core structure of fig. 5.

Fig. 7 is a schematic perspective view of a magnetic core structure according to a third embodiment of the present invention.

Detailed Description

The embodiments disclosed in the present invention are described below with reference to specific embodiments, and those skilled in the art can understand the advantages and effects of the present invention from the disclosure in the present specification. The present invention can be implemented or applied through other different specific embodiments, and various details in the present specification can be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. The drawings of the present invention are merely schematic illustrations, and are not drawn to scale, but are described in advance. The following embodiments will further explain the related art of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention.

It will be understood that, although the terms "first," "second," "third," etc. may be used herein to describe various components or signals, these components or signals should not be limited by these terms. These terms are used primarily to distinguish one element from another element or from one signal to another signal. In addition, the term "or" as used herein should be taken to include any one or combination of more of the associated listed items as the case may be. Furthermore, the term "electrically coupled", as used herein, refers to one of "indirectly electrically connected" and "directly electrically connected".

[ first embodiment ]

Referring to fig. 1 to 4, the present embodiment provides a magnetic core structure 100A, where the magnetic core structure 100A includes a magnetic core plate 1, a magnetic core body 2 disposed on the magnetic core plate 1, and N coils 3 disposed on the magnetic core body 2. When the following components are numbered with algebraic "N", N is a positive integer not less than 2.

Referring to fig. 1 and 2, the magnetic core plate 1 is substantially rectangular sheet-shaped in the present embodiment, and has a first plate surface 11 and a second plate surface 12 opposite to each other. First face 11 can polish in the practice and handle, makes first face 11 is the smooth surface, nevertheless the utility model discloses not be limited to this embodiment and carry.

The magnetic core body 2 in this embodiment has a center pillar 21, two side pillars 22 connecting the center pillar 21, and two conductive units 23 disposed on the two side pillars 22, and the magnetic core body 2 can be disposed on the first board 11 through the two side pillars 22, so that the center pillar 21 does not contact the first board 1. Next, the components of the core body 2 and their connection relationship will be described in detail below.

As shown in fig. 2 and 3, the center pillar 21 has a columnar structure, and is used for winding N coils 3. The center pillar 21 has an extending direction D1 and a width direction D2 perpendicular to the extending direction D1. It should be noted that, when the cross section of the center pillar 21 along the width direction D2 is viewed, the cross section of the center pillar 21 is substantially rectangular in the present embodiment, and four end corners of the rectangle are rounded, and this design can effectively prevent the insulation layers (e.g., insulation varnish) of the N coils 3 from falling off due to friction between the N coils 3 and the center pillar 21. Of course, the center pillar 21 may be designed to have a cylindrical structure with a circular cross section.

The two side pillars 22 are integrally connected to the center pillar 21, and have a connecting portion 221 and two protruding portions 222. Specifically, the two connecting portions 221 connect two ends of the center pillar 21 along the extending direction D1, and one side surface of the two connecting portions 221 facing the first plate surface 11 (i.e., the bottom surface of the two connecting portions 221 in fig. 3) is polished, so that the two connecting portions 221 have a smooth installation surface SF. Magnetic core body 2 passes through contact surface SF set up in when on the first face 11 of magnetic core board 1, magnetic core body 2 with have still less air gap in order to promote the inductance between the magnetic core board 1, nevertheless the utility model discloses not be limited to this embodiment and carry.

Next, as shown in fig. 1 and 4, a plurality of side surfaces (not including the side surface facing the center pillar 21) of the two connecting portions 221 are substantially aligned with the side surface of the magnetic core plate 1 in practice, and an orthographic projection area of the two connecting portions 221 and the center pillar 21 toward the magnetic core plate 1 is not larger than an area of the magnetic core plate 1, so that the orthographic projection area of the two connecting portions 221 and the center pillar 21 toward the magnetic core plate 1 does not exceed the edge of the magnetic core plate 1, but the present invention is not limited to this embodiment. For example, the designer may adjust the orthographic projection areas of the two connecting portions 221 and the center pillar 21 toward the magnetic core plate 1 to be beyond the edge of the magnetic core plate 1 based on design considerations.

As shown in fig. 2 and 3, the connecting portion 221 further includes two first installation surfaces 2211 connected to each other, and the two first installation surfaces 2211 are located on a side of the connecting portion 221 away from the center pillar 21 and a side of the connecting portion 221 away from the magnetic core plate 1.

Referring to fig. 1 to 3 again, the two protruding portions 222 are located on a side of the connecting portion 221 away from the first board surface 11, and the two protruding portions 222 connect two ends of the connecting portion 221 along the width direction D2. That is, the two protrusions 222 and the connection portion 221 are arranged in such a manner that the two side pillars 22 are substantially T-shaped.

As can be seen from fig. 1, the orthographic projection areas of the two protrusions 222 of the two side columns 22 toward the magnetic core plate 1 are located outside the magnetic core plate 1, that is, the two protrusions 222 protrude from the connecting portion 221 and the magnetic core plate 1. In practice, the length of the two protruding portions 222 along the width direction D2 is preferably 8% to 12% of the length of the connecting portion 221 along the width direction D2, so that the two protruding portions 222 have a sufficient protruding length compared to the connecting portion 221, which is beneficial for the magnetic core structure 100A to be conveniently fixed by the two protruding portions 222 during the manufacturing process.

Referring to fig. 3 again, each of the two protruding portions 222 has three second installation surfaces 2221 connected to each other, and the three second installation surfaces 2221 are located on a side of the protruding portion 222 away from the connecting portion 221, a side of the protruding portion 222 away from the center pillar 21, and a side of the protruding portion 222 away from the magnetic core plate 1 (i.e., above in fig. 3).

Referring to fig. 2 to 4, two of the conductive units 23 respectively have two first conductive plating layers 231 and N second conductive plating layers 232. Specifically, in any one of the conductive elements 23 and the corresponding side post 22, the two first conductive plating layers 231 are respectively disposed on the three second mounting surfaces 2221 of the two protruding portions 222 by electroplating. That is, each of the first conductive plating layers 231 covers three surfaces of the protruding portion 222, so that each of the first conductive plating layers 231 has enough adhesion to be fixed on the protruding portion 222, thereby preventing two of the first conductive plating layers 231 from falling off the side post 22.

It should be noted that, in practice, the two first conductive plating layers 231 can be used to be electrically coupled to a circuit board (not shown), and the way of electrically coupling the two first conductive plating layers 231 to the circuit board may be direct soldering or connection through a wire, but the invention is not limited thereto.

The number of the N second conductive plating layers 232 is two in this embodiment. In any one of the conductive units 23 and the corresponding side pillars 22, the two second conductive plating layers 232 are respectively disposed on the two first mounting surfaces 2211, that is, each second conductive plating layer 232 covers two surfaces of the connecting portion 221, and each second conductive plating layer 232 is substantially in an "L" shape.

In more detail, two of the second conductive plating layers 232 are spaced apart from each other by a second predetermined distance L2, and each of the second conductive plating layers 232 is spaced apart from the adjacent first conductive plating layer 231 by a first predetermined distance L1 (as shown in fig. 4), the first predetermined distance L1 is the same as the second predetermined distance L2 in the embodiment, and the first predetermined distance L1 and the second predetermined distance L2 are preferably not less than 5% of the length of the first side pillar 22 along the width direction D2, and in practice preferably not less than 0.25 millimeter (mm). Accordingly, the two first conductive plating layers 231 and the two second conductive plating layers 232 can prevent the flashover between them by the first predetermined distance L1 and the second predetermined distance L2.

The number of the N coils 3 is two in the present embodiment, and two coils 3 are wound around the center pillar 21. The two coils 3 respectively have two connection terminals 31, and the two connection terminals 31 of each coil 3 are electrically coupled to the two second conductive plating layers 232 of the two conductive units 23. It should be noted that the magnetic core structure 100A of the present embodiment is suitable for an Inductor (Inductor), a Filter (Filter), a Booster (Booster), and a Buck (Buck), but the present invention is not limited thereto.

[ second embodiment ]

As shown in fig. 5 and fig. 6, which are another embodiment of the present invention, the present embodiment is similar to the magnetic core structure 100A of the above embodiment, and the same points of the two embodiments are not repeated, but the difference of the present embodiment compared to the first embodiment of the magnetic core structure 100B mainly lies in:

in the present embodiment, the number of the N second conductive plating layers 232 of each conductive unit 23 is three, and the number of the N coils 3 is also three. For convenience of illustration, the two side posts 22 are further defined as a first side post 22 and a second side post 22.

Specifically, in the first side pillar 22 and the corresponding conductive unit 23, each of the second conductive plating layers 232 is spaced apart from the adjacent first conductive plating layer 231 by a first predetermined distance L6, and the second conductive plating layer 232 between two second conductive plating layers 232 has a maximum disposition distance L5 with the second conductive plating layer 232 farthest therefrom. In the present embodiment, the first predetermined distance L6 is preferably 5% to 9% of the length of the first side pillar 22 along the width direction D2, and is preferably between 0.25 millimeter (mm) and 0.4 millimeter (mm), and the maximum disposition distance L5 is preferably greater than the first predetermined distance L6 and is 8% to 12% of the length of the first side pillar 22 along the width direction, and the maximum disposition distance L5 is preferably 0.5 millimeter (mm), but the invention is not limited thereto. In other words, three of the second conductive plating layers 232 are not disposed in an equidistant manner from each other in the present embodiment.

The two connecting terminals 31 of the three coils 3 are electrically coupled to the three second conductive plating layers 232 on the second side pillar 22 and the three second conductive plating layers 232 on the first side pillar 22, respectively.

It should be noted that, the three second conductive plating layers 232 on the second side column 22 and the three second conductive plating layers 232 on the first side column 22 are in a 180-degree rotational symmetric relationship with respect to the central point of the central column 21 (as shown in fig. 6), and the magnetic core structure 100B of the present embodiment is suitable for use in a transformer (transformer), but the invention is not limited thereto.

[ third embodiment ]

As shown in fig. 7, which is another embodiment of the present invention, the present embodiment is similar to the magnetic core structure 100B of the above embodiment, and the same points of the two embodiments are not repeated, but the difference of the present embodiment compared with the second embodiment of the magnetic core structure 100C mainly lies in:

the magnetic core body 2 has a plurality of grooves GV on any one of the side posts 22. Specifically, the grooves GV are located on a side away from the magnetic core plate 1, and are respectively located between the adjacent first conductive plating layer 231 and the adjacent second conductive plating layer 232, and between two adjacent second conductive plating layers 232. That is, each of the first conductive plating layers 231 and each of the second conductive plating layers 232 are separated by a plurality of the grooves GV.

In practice, each of the plurality of grooves has a predetermined depth L3, and the predetermined depth L3 is preferably 26% to 30% of the thickness L4 of the protrusion. For example, if the thickness of the protruding portion in fig. 7 is 0.7 mm, the predetermined depth L3 is preferably 0.2 mm, but the present invention is not limited thereto.

It should be noted that in any one of the side pillars 22 and the corresponding conductive unit 23, the creepage distance between the two first conductive plating layers 231 and the three second conductive plating layers 232 can be increased by using the plurality of grooves GV, so as to further prevent a spark-over situation.

Of course, the magnetic core structure 100C of the present embodiment may also be adjusted to two by the designer's requirement, that is, the number of the second conductive plating layers 232 and the number of the coils 3 are similar to the magnetic core structure 100A of the first embodiment.

[ technical effects of the embodiments of the present invention ]

The above mentioned embodiments are only preferred and feasible embodiments of the present invention, and are not intended to limit the scope of the present invention, and all equivalent changes and modifications made according to the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A magnetic core structure, comprising:

a magnetic core plate;

a magnetic core body, set up in on the magnetic core board, the magnetic core body contains:

a center pillar having an extending direction and a width direction perpendicular to the extending direction;

the two side columns are respectively connected with two ends of the central column along the extending direction, each side column respectively comprises a connecting part and two protruding parts, the two protruding parts are positioned on one side, away from the magnetic core plate, of the connecting part, the two protruding parts are connected with two ends of the connecting part along the width direction, the connecting part is provided with two first setting surfaces which are connected with each other, and the two protruding parts are respectively provided with three second setting surfaces which are connected with each other; and

two electrically conductive units, set up respectively in two the side post, every electrically conductive unit contains:

the two first conductive coatings are respectively arranged on the three second arrangement surfaces of the two convex parts and can be electrically coupled with a circuit board; and

n second conductive plating layers respectively disposed on the two first mounting surfaces of the connecting portion, the N second conductive plating layers being disposed at intervals, and any one of the second conductive plating layers and the first conductive plating layer adjacent thereto being disposed at intervals, where N is a positive integer not less than 2; and

and the N coils are wound on the middle column and respectively provided with two connecting ends, and the two connecting ends of the N coils are electrically coupled with the N second conductive coatings of the two conductive units.

2. The magnetic core structure according to claim 1, wherein in any one of the side pillars, lengths of the two convex portions in the width direction are respectively 8% to 12% of a length of the connecting portion in the width direction.

3. The core structure according to claim 1, wherein in any one of the side pillars, the two first arrangement surfaces are located on a side of the connecting portion away from the center pillar and on a side of the connecting portion away from the core plate; in any one of the convex portions, the three second installation surfaces are respectively located on one side of the convex portion away from the connecting portion, one side of the convex portion away from the center pillar, and one side of the convex portion away from the magnetic core plate.

4. A core structure according to claim 1, wherein the two side legs are each substantially T-shaped.

5. The core structure of claim 1, wherein any one of the first conductive plating layers is spaced apart from the adjacent second conductive plating layer by a predetermined distance that is 7% to 9% of the length of the side pillar corresponding to the position of the predetermined distance along the width direction.

6. The magnetic core structure according to claim 1, wherein an orthographic projection area of the connecting portion of the two side legs and the center leg toward the magnetic core plate does not exceed the magnetic core plate.

7. The core structure of claim 1, wherein an area of orthographic projection of the two protrusions of the two side legs toward the core plate is located outside the core plate.

8. The core structure of claim 1, wherein the core body has a plurality of grooves on any of the side legs, and the plurality of grooves are respectively located between the adjacent first conductive plating and the second conductive plating and between two adjacent second conductive plating.

9. The core structure of claim 8, wherein each of the plurality of recesses has a predetermined depth that is 26% to 30% of a thickness of the protrusion.

10. The core structure of claim 1, wherein in any one of the conductive elements and its corresponding side post, the N second conductive plating layers and the two first conductive plating layers are disposed at equal intervals from each other.