Magnetic assembly and electronic equipment

Abstract

The utility model relates to the technical field of magnetic assemblies, and discloses a magnetic assembly and electronic equipment, and the magnetic assembly comprises a circuit board substrate, a plurality of magnetic cores and conductors. The circuit board substrate is provided with a plurality of first through holes, and the first through holes penetrate through the circuit board substrate in the thickness direction of the circuit board substrate. The magnetic core comprises a first end plate, a second end plate and wrapping posts, the number of the first through holes is the same as that of the wrapping posts, one wrapping post penetrates through one first through hole, the first end plate and the second end plate are oppositely arranged on the two sides of the circuit board substrate in the thickness direction of the circuit board substrate, and the two ends of the wrapping posts are connected with the first end plate and the second end plate respectively; the conductor is arranged around the wrapping post. Through the mode, the size of the magnetic assembly can be reduced, the yield of the magnetic assembly and the consistency of parameters can be improved, and when at least two magnetic cores are integrated on the same circuit board substrate, the design complexity can be reduced, the overall design process can be simplified, the number of assemblies can be reduced, and the production cost can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of magnetic components, in particular to a magnetic component and an electronic device. BACKGROUND

[0002] The magnetic component of the current switching power supply includes a magnetic core, a framework and a winding, wherein the framework provides overall structural support for the magnetic core and the winding, the magnetic core is fixed to the framework, and the winding is composed of a wire directly wound outside the winding column of the magnetic core through the window of the magnetic core. The current structure of the magnetic core adopts the structure mode that the framework and the wire are directly wound on the winding group to form the winding, the framework only plays a supporting role, occupies a large space, and the framework may limit the layout mode of the coil and occupy the space of the winding, resulting in a decrease in the utilization rate of the window of the magnetic core. On the other hand, in the manufacturing process, including winding, cutting and peeling, tin plating and welding processes, there are a large number of manual operations in the manufacturing process, thereby introducing uncontrollable quality risks, the parameter consistency of the magnetic component is poor, and the product yield is not high. CONTENT OF THE UTILITY MODEL

[0003] In view of the problems in the background art, the purpose of the present application is to provide a magnetic component and an electronic device, which overcome the above problems or at least partially solve the above problems.

[0004] According to a first aspect of the present application, a magnetic component is provided, comprising a circuit board substrate, a plurality of magnetic cores and a conductor. The circuit board substrate is provided with a plurality of first through holes, the first through holes penetrating through the circuit board substrate along the thickness direction of the circuit board substrate. The magnetic core comprises a first end plate, a second end plate and a winding column, the number of the first through holes is the same as the number of the winding columns, one winding column is arranged in one first through hole, along the thickness direction of the circuit board substrate, the first end plate and the second end plate are oppositely arranged on the two sides of the circuit board substrate, and the two ends of the winding column are connected with the first end plate and the second end plate respectively. The conductor is arranged around the winding column.

[0005] In one or more optional embodiments above, the circuit board substrate is provided with a plurality of second through holes, the second through holes penetrating through the circuit board substrate along the thickness direction of the circuit board substrate, the magnetic core comprises a common column, the two ends of the common column are connected with the first end plate and the second end plate respectively, and the number of the second through holes is the same as the number of the common column. One common column is arranged in one second through hole.

[0006] In one or more optional embodiments above, the shape of the first through hole matches the shape of the winding column, and / or the shape of the second through hole matches the shape of the common column.

[0007] In one or more optional embodiments above, the first end plate is adhered and fixed to the circuit board substrate toward the surface of the circuit board substrate along the thickness direction of the circuit board substrate; and / or the second end plate is adhered and fixed to the circuit board substrate toward the surface of the circuit board substrate along the thickness direction of the circuit board substrate.

[0008] In one or more optional embodiments above, the magnetic core comprises a first portion and a second portion arranged oppositely along the thickness direction of the circuit board substrate, and the first portion is adhered and fixed to the second portion.

[0009] In one or more optional embodiments above, the circuit board substrate is provided with a pin, one end of the pin is electrically connected to one end of the conductor, and the other end of the pin is used for plugging into the plugging interface of other equipment.

[0010] In one or more optional embodiments above, the conductor comprises a conductive line arranged on the circuit board substrate; or the conductor comprises a conductive row wound around the portion of the winding column located outside the first through hole.

[0011] In one or more optional embodiments above, the conductor comprises a conductive line arranged on the circuit board substrate and a conductive row wound around the portion of the winding column located outside the first through hole, and the conductive row is electrically connected to the corresponding conductive line of the winding column.

[0012] The circuit board substrate is provided with a third through hole penetrating through the circuit board substrate along the thickness direction of the circuit board substrate, and the inner wall of the third through hole is provided with a metal layer connected to the corresponding conductive line of the winding column surrounded by the conductive row. The end of the conductive row is provided with a connecting hole. The magnetic assembly comprises a mounting column, the first end of the mounting column is sequentially arranged in the third through hole and the connecting hole, and the first end of the mounting column is respectively welded to the metal layer and the connecting hole to be respectively electrically connected to the conductive line and the conductive row. The second end of the mounting column is provided with a threaded connection part for electrically connecting to other equipment through threads.

[0013] In one or more optional embodiments above, the number of magnetic cores is three, one magnetic core and the conductor constitute a DC-DC circuit inductor, another magnetic core and the conductor constitute a PFC circuit inductor, and the other magnetic core and the conductor constitute a transformer of a resonant converter.

[0014] In one or more optional embodiments above, the magnetic core of the DC-DC circuit inductor includes one common post and two winding posts, the common post is disposed through the circuit board substrate, the common post is disposed between the two winding posts, the conductor includes two groups of conductive lines respectively wound around the two winding posts and two conductive strips respectively wound around the two winding posts, the conductive lines are disposed on the circuit board substrate, and the conductive strips are wound around the portions of the winding posts outside the first through holes.

[0015] In one or more optional embodiments above, the magnetic core of the PFC circuit inductor includes two winding posts disposed opposite to each other and two common posts disposed opposite to each other between the two winding posts, the common posts are disposed through the circuit board substrate, and the conductor includes two groups of conductive lines respectively wound around the two winding posts, the conductive lines being disposed on the circuit board substrate.

[0016] In one or more optional embodiments above, the magnetic core of the transformer of the resonant converter includes three winding posts and six common posts, the common posts are disposed through the circuit board substrate, the three winding posts are arranged in sequence, and every two common posts are disposed on both sides of one winding post along a direction perpendicular to the arrangement direction of the winding posts, the conductor includes three groups of conductive lines respectively wound around the three winding posts, and the conductive lines are disposed on the circuit board substrate.

[0017] According to a second aspect of the present application, an electronic device is provided, which includes the magnetic assembly as described above.

[0018] In one or more optional embodiments above, the electronic device includes a housing and an elastic pressing sheet, the circuit board substrate is fixed to the housing, the housing has a support surface disposed opposite to the circuit board substrate along a thickness direction of the circuit board substrate, and the support surface carries the second end plate; one end of the elastic pressing sheet is fixed to the housing, and the other end of the elastic pressing sheet abuts against a surface of the first end plate away from the support surface in a direction toward the support surface, so as to press the magnetic core toward the support surface.

[0019] The magnetic assembly provided by the embodiment of the present application adopts a circuit board substrate to replace the traditional framework of the magnetic assembly, the winding post is arranged in the first through hole of the circuit board substrate, and the conductor is arranged around the winding post. Compared with the traditional magnetic assembly, the circuit board substrate can be provided with a conductive circuit to form a required circuit while playing a supporting role, which is conducive to improving the space utilization rate, reducing the volume of the magnetic core assembly, and improving the yield and parameter consistency of the magnetic assembly. When the number of magnetic cores is greater than one, at least two magnetic cores are integrated on the same circuit board substrate. Compared with the traditional method of separately arranging the framework for each magnetic core, at least two magnetic cores share one circuit board substrate, which is conducive to reducing the complexity of the design, simplifying the overall design process, reducing the number of components, and reducing the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the drawings needed to be used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0021] Figure 1 A perspective view of a magnetic assembly provided by the embodiment of the present application;

[0022] Figure 2 An exploded view of a magnetic assembly provided by the embodiment of the present application;

[0023] Figure 3 A cross-sectional view of a magnetic assembly provided by the embodiment of the present application after being cut along the direction X;

[0024] Figure 4 A schematic view of a magnetic assembly provided by the embodiment of the present application when being fixed to an electronic device shell. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present application, the present application will be described in more detail below in combination with the drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element or one or more intervening elements can be present therebetween. When an element is described as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements can be present therebetween. The terms "vertical", "horizontal", "left", "right", "inner", "outer" and similar expressions used in the present specification are only for the purpose of illustration.

[0026] Unless otherwise defined, all technical and scientific terms used in the present disclosure have the same meanings as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. All publications, patent applications, patents, and other references mentioned in this specification are herein incorporated by reference in their entirety for the purpose of describing and disclosing, for example, the methodologies described in such publications, which might provide useful background to the present application.

[0027] In the description of the present application, unless otherwise explicitly defined and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrated; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0029] Please refer to Figures 1-3 The magnetic assembly 100 includes a circuit board substrate 1, a plurality of magnetic cores 2 and a conductor. The circuit board substrate 1 is provided with a plurality of first through holes 11, the first through holes 11 penetrating the circuit board substrate 1 along the thickness direction X of the circuit board substrate 1. The magnetic core 2 includes a first end plate 21, a second end plate 22 and a winding column 23, the number of the first through holes 11 is the same as the number of the winding columns 23, one winding column 23 is arranged in one first through hole 11, the first end plate 21 and the second end plate 22 are oppositely arranged on both sides of the circuit board substrate 1 along the thickness direction X of the circuit board substrate 1, the two ends of the winding column 23 are connected with the first end plate 21 and the second end plate 22 respectively, and the conductor is arranged around the winding column 23. The conductor is wound to form a winding, and the circuit board substrate 1 is used to provide structural support for the magnetic core 2 and the conductive circuit.

[0030] The magnetic component 100 provided in this embodiment uses a circuit board substrate 1 instead of the traditional skeleton of the magnetic component 100. A winding post 23 passes through the first through-hole 11 of the circuit board substrate 1, and a conductor is arranged around the winding post 23. Compared to the traditional magnetic component 100, the circuit board substrate 1, while providing support, can also be configured with conductive lines to form the required circuit, which improves space utilization, reduces the volume of the magnetic core component 100, and the manufacturing process of the circuit board substrate 1 has a high degree of automation, thus improving the yield and parameter consistency of the magnetic component 100. When the number of magnetic cores 2 is greater than one, at least two magnetic cores 2 are integrated on the same circuit board substrate 1. Compared to the traditional method of setting separate skeletons for each magnetic core 2, at least two magnetic cores 2 share one circuit board substrate 1, which helps reduce design complexity, simplify the overall design process, reduce the number of components, and lower production costs.

[0031] In some embodiments, the conductor includes conductive lines (not shown) disposed on the circuit board substrate 1.

[0032] In some embodiments, the conductive lines are spirally wound on the winding post 23 along the thickness direction X of the circuit board substrate 1.

[0033] In some embodiments, the circuit board substrate 1 includes a plurality of conductive layers stacked along the thickness direction X of the circuit board substrate 1, with insulating layers separating the conductive layers. The conductive line includes at least two annular portions located on different conductive layers, the annular portions surrounding the winding post 23, and the annular portions of a conductive line are connected in series, the number of annular portions of the conductor line corresponding to the number of turns of the winding.

[0034] In some embodiments, adjacent annular portions are connected in series along the thickness direction X of the circuit board substrate 1 to form a conductive line spirally wound on the winding post 23 along the thickness direction X of the circuit board substrate 1, which is equivalent to a conventional wire spirally wound on the winding post 23 along the axial direction of the winding post 23. It is understood that the connection order of the annular portions located in each conductive layer is not limited to being electrically connected sequentially along the thickness direction X of the circuit board substrate 1. For example, the annular portion located in the first conductive layer is first electrically connected to the annular portion located in the third conductive layer, and then electrically connected to the annular portion located in the second conductive layer.

[0035] In some embodiments, the annular portions located in different conductive layers are connected by metallized holes. The metallized holes are holes that extend along the thickness direction X of the circuit board substrate 1 with metal layers attached to their walls. The metal layers attached to the hole walls enable electrical connection between the annular portions.

[0036] In some embodiments, the conductive lines are arranged in a spiral shape along the radial direction of the winding post 23 in the same conductive layer, which is equivalent to the traditional spiral winding of the conductive lines along the radial direction of the winding post 23.

[0037] It can be understood that in one magnetic core 2, the number of winding posts 23 can be set to one or more according to the type of the actual magnetic core 2.

[0038] It can also be understood that in one magnetic core 2, the number of conductive lines corresponding to one winding post 23 and the arrangement of the conductive lines can be set according to the function to be achieved by the actual magnetic core 2. One complete conductive track formed by the conductive lines can be arranged around one winding post 23, or can be arranged around two or more winding posts 23 respectively.

[0039] In some embodiments, the circuit board substrate 1 is provided with a plurality of second through holes 12, the second through holes 12 penetrating the circuit board substrate 1 along the thickness direction X of the circuit board substrate 1, the magnetic core 2 includes a common post 24, the two ends of the common post 24 are connected to the first end plate 21 and the second end plate 22 respectively, the number of the second through holes 12 is the same as the number of the common posts 24, and one common post 24 is arranged in one second through hole 12.

[0040] It can be understood that in one magnetic core 2, the number of common posts 24 can be set to one or more according to the type of the actual magnetic core 2.

[0041] In some embodiments, the shape of the first through hole 11 matches the shape of the winding post 23. For example, in an embodiment, the winding post 23 is a column with a circular cross-section, and the shape of the first through hole 11 is correspondingly set as a column with a circular cross-section. When the winding post 23 is arranged in the first through hole 11, the outer wall of the winding post 23 is fitted to the inner wall of the first through hole 11, and the inner wall of the first through hole 11 limits the winding post 23.

[0042] In some embodiments, the shape of the second through hole 12 matches the shape of the common post 24. For example, in an embodiment, the common post 24 is a column with a square cross-section, and the shape of the second through hole 12 is correspondingly set as a column with a square cross-section. When the common post 24 is arranged in the second through hole 12, the outer wall of the common post 24 is fitted to the inner wall of the second through hole 12, and the inner wall of the second through hole 12 limits the common post 24.

[0043] In some embodiments, along the thickness direction X of the circuit board substrate 1, the magnetic core 2 includes a first part 2a and a second part 2b arranged oppositely, and the first part 2a is adhesively fixed to the second part 2b. The structure and shape of the first part 2a and the second part 2b can be set according to the application and design requirements of the magnetic core 2.

[0044] In some embodiments, the first portion 2a and the second portion 2b are mirror-symmetrically arranged about a symmetry plane perpendicular to the thickness direction X of the circuit board substrate 1. Specifically, in some embodiments, the first portion 2a includes the first end plate 21, one half of the winding post 23, and one half of the common post 24, the second portion 2b includes the second end plate 22, the other half of the winding post 23, and the other half of the common post 24, along the thickness direction X of the circuit board substrate 1, one half of the winding post 23 located at the first end plate 21 is adhesively fixed to the other half of the winding post 23 located at the second end plate 22, and one half of the common post 24 located at the first end plate 21 is adhesively fixed to the other half of the common post 24 located at the second end plate 22.

[0045] In some embodiments, the first portion 2a includes the first end plate 21, the second portion 2b includes the second end plate 22, and the winding post 23 and the common post 24 connected to the second end plate 22, along the thickness direction X of the circuit board substrate 1, the end surface of the winding post 23 and the common post 24 away from the second end plate 22 is adhesively fixed to the surface of the first end plate 21 facing the second end plate 22.

[0046] In some embodiments, along the thickness direction X of the circuit board substrate 1, the surface of the first end plate 21 facing the circuit board substrate 1 is adhesively fixed to the circuit board substrate 1.

[0047] In some embodiments, the circuit board substrate 1 includes a first surface 13 and a second surface 14 arranged opposite to each other along the thickness direction X of the circuit board substrate 1, the first end plate 21 includes a third surface 211, the second end plate 22 includes a fourth surface 221, along the thickness direction X of the circuit board substrate 1, the third surface 211 and the fourth surface 221 are arranged facing each other, and the two ends of the winding post 23 and the common post 24 are connected to the third surface 211 and the fourth surface 221, respectively.

[0048] In some embodiments, the third surface 211 is adhesively fixed to the first surface 13.

[0049] In some embodiments, the third surface 211 is protruded to form a first protruding portion 2111, and the end surface 2111a of the first protruding portion 2111 facing the fourth surface 221 is adhesively fixed to the first surface 13. The end surface 2111a of the first protruding portion 2111 abuts against the first surface 13, so that a preset gap is formed between the third surface 211 and the first surface 13 of the circuit board substrate 1 along the thickness direction X of the circuit board substrate 1.

[0050] In some embodiments, along the thickness direction X of the circuit board substrate 1, the surface of the second end plate 22 facing the circuit board substrate 1 is adhesively fixed to the circuit board substrate 1.

[0051] In some embodiments, the fourth surface 221 is adhesively fixed to the second surface 14.

[0052] In some embodiments, the fourth surface 221 is protruded to form a second protruding portion 2211, the second protruding portion 2211 is fixedly bonded to the second surface 14 at an end surface 2211a of the second protruding portion 2211 facing the third surface 211, and the end surface 2211a of the second protruding portion 2211 abuts against the second surface 14, so that a preset gap is formed between the fourth surface 221 and the second surface 14 of the circuit board substrate 1 in the thickness direction X of the circuit board substrate 1.

[0053] In some embodiments, the conductor includes a conductive bar 3, the conductive bar 3 is wound around the portion of the winding post 23 located outside the first through hole 11. The conductive bar 3 can supply larger current than the conductive line to meet the application requirement of large current.

[0054] In some embodiments, the magnetic assembly 100 includes the conductive bar 3 and the conductive line, the conductive line is arranged on the circuit board substrate 1, the conductive bar 3 is wound around the portion of the winding post 23 located outside the first through hole 11, and the conductive bar 3 is electrically connected to the conductive line corresponding to the winding post 23 around which the conductive bar 3 is wound.

[0055] In some embodiments, the conductive bar 3 includes, but is not limited to, a copper bar.

[0056] In some embodiments, the circuit board substrate 1 is provided with a third through hole 15, the third through hole 15 penetrates the circuit board substrate 1 in the thickness direction X of the circuit board substrate 1, and the inner wall of the third through hole 15 is provided with a metal layer (not shown in the figure), the metal layer is connected to the conductive line corresponding to the winding post 23 around which the conductive bar 3 is wound. The end of the conductive bar 3 is provided with a connecting hole 31. The magnetic assembly 100 includes a mounting post 4, a first end of the mounting post 4 is sequentially arranged in the third through hole 15 and the connecting hole 31, and the first end of the mounting post 4 is respectively welded to the metal layer and the connecting hole 31 to be respectively electrically connected to the conductive line and the conductive bar 3. The second end of the mounting post 4 is provided with a threaded connection portion 41, and the threaded connection portion 41 is used to be electrically connected to other equipment through threads. The threaded connection portion 41 can be a threaded hole or a threaded post, etc. The mounting post 4 is electrically connected to the conductive line and the conductive bar 3 respectively, and the second end of the mounting post 4 is provided with a threaded connection portion, the mounting post 4 electrically connects the conductive line and the conductive bar 3 to other equipment through threads, which is advantageous to improve the reliability of connection and the convenience of disassembly compared with the traditional winding of the magnetic assembly 100 which is electrically connected to other equipment through welding.

[0057] In some embodiments, the third through hole 15 is a metalized hole.

[0058] In some embodiments, the circuit board substrate 1 is provided with a pin 5, one end of the pin 5 is electrically connected with one end of the conductor, and the other end of the pin 5 is used for plugging into the plugging interface of other equipment. The pin 5 electrically connects the conductor with other equipment through plugging, which is more convenient for disassembly than the traditional magnetic assembly 100 whose winding is electrically connected with other equipment through welding.

[0059] It can be understood that the number of the mounting posts 4 and the pins 5 can be set according to the type of the actual magnetic core 2.

[0060] In some embodiments, the number of the magnetic cores 2 is three, one magnetic core 2 and the conductor constitute a DC-DC (Direct Current-Direct Current) circuit inductor A, another magnetic core 2 and the conductor constitute a PFC (Power Factor Correction) circuit inductor B, and the other magnetic core 2 and the conductor constitute a transformer C of a resonant converter.

[0061] In some embodiments, the magnetic assembly 100 is applied to a vehicle-mounted power supply module, the DC-DC circuit inductor A is used for storing energy and smoothing current, the PFC circuit inductor B is used for improving the power factor of the power supply, and the transformer C of the resonant converter is used for voltage conversion and isolation.

[0062] In some embodiments, the common post 24 of the magnetic core 2 of the DC-DC circuit inductor A is named as a first common post 241, the winding post 23 of the magnetic core 2 of the DC-DC circuit inductor A is named as a first winding post 231, and the magnetic core 2 of the DC-DC circuit inductor A includes one first common post 241 and two first winding posts 231. The first common post 241 is arranged in the circuit board substrate 1, the first common post 241 is arranged between the two first winding posts 231, the conductor includes two groups of conductive lines respectively wound on the two first winding posts 23 and two conductive rows 3 respectively wound on the two first winding posts 23, the conductive lines are arranged on the circuit board substrate 1, and the conductive rows 3 are wound on the part of the winding post 23 located outside the first through hole 11.

[0063] It is worth noting that in this application, a group of conductive lines refers to all conductive lines wound on the same winding post 23. In other words, if a conductive line only winds around one winding post 23, the conductive line only belongs to one group of conductive lines; if one segment of a conductive line winds around one winding post 23 and the other segment winds around another winding post 23, the two segments of the conductive line that wind around the two winding posts 23 respectively belong to two groups of conductive lines.

[0064] In some embodiments, one conductive line is arranged around the first winding post 231, the conductive line extends helically along the thickness direction X of the circuit board substrate 1, and the two ends of the conductive line are electrically connected to the portions of the first ends of the two mounting posts 4 located in the third through hole 15 through the metal layer. In this way, the two mounting posts 4 are connected in parallel with the conductive row 3 through the one conductive line.

[0065] In some embodiments, the winding post 23 of the magnetic core 2 of the PFC circuit inductor B is named as a second winding post 232, the common post 24 of the magnetic core 2 of the PFC circuit inductor B is named as a second common post 242, the magnetic core 2 of the PFC circuit inductor B includes two second winding posts 232 arranged oppositely and two second common posts 242 arranged oppositely between the two second winding posts 232, the second common post 242 penetrates the circuit board substrate 1, and the conductor includes two groups of conductive lines respectively wound around the two second winding posts 23, and the conductive lines are arranged on the circuit board substrate 1.

[0066] In some embodiments, the two ends of one conductive line of the magnetic core 2 of the PFC circuit inductor B are respectively connected to one end of the two pins 5.

[0067] In some embodiments, the winding post 23 of the magnetic core 2 of the transformer C of the resonant converter is named as a third winding post 233, the common post 24 of the magnetic core 2 of the transformer C of the resonant converter is named as a third common post 243, the magnetic core 2 of the transformer C of the resonant converter includes three third winding posts 233 and six third common posts 243, the third common post 243 penetrates the circuit board substrate 1, the three third winding posts 233 are arranged in sequence, and every two third common posts 243 are arranged on the two sides of one third winding post 233 along a direction perpendicular to the arrangement direction of the third winding post 233, the conductor includes three groups of conductive lines respectively wound around the three third winding posts 233, and the conductive lines are arranged on the circuit board substrate 1.

[0068] In some embodiments, the two ends of one conductive line of the magnetic core 2 of the transformer C of the resonant converter are respectively connected to one end of the two pins 5.

[0069] Based on the same inventive concept, the embodiments of the present application also provide an electronic device including the magnetic assembly 100 in any of the above embodiments.

[0070] In some embodiments, the electronic device includes but is not limited to a vehicle-mounted power supply module.

[0071] Please refer to Figure 4In some embodiments, the electronic device includes a housing 200 and an elastic pressing sheet 300, the circuit board substrate 1 is fixed to the housing 200, the housing 200 has a support surface 201 opposite to the circuit board substrate 1 along the thickness direction X of the circuit board substrate 1, and the support surface 201 carries the second end plate 22. One end of the elastic pressing sheet 300 is fixed to the housing 200, and the other end of the elastic pressing sheet 300 abuts against the surface of the first end plate 21 away from the support surface 201 in the direction toward the support surface 201, so as to press the magnetic core 2 toward the support surface 201. The circuit board substrate 1 is fixed to the housing 200, and the magnetic core 2 is pressed against the support surface of the housing 200 by the elastic pressing sheet 300, so that the magnetic core 2 is fixed relative to the circuit board substrate 1. In this way, the magnetic core 2 can be fixed to the circuit board substrate 1 instead of being bonded to the circuit board substrate 1.

[0072] In some embodiments, the circuit board substrate 1 is screwed to the housing 200 along the thickness direction X of the circuit board substrate 1.

[0073] In some embodiments, the one end of the elastic pressing sheet 300 away from the first end plate 21 is screwed to the housing 200 along the thickness direction X of the circuit board substrate 1.

[0074] The above is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.

Claims

1. A magnetic assembly, characterized by The magnetic assembly comprises: a circuit board substrate provided with a plurality of first through holes penetrating the circuit board substrate along the thickness direction of the circuit board substrate; a plurality of magnetic cores, the magnetic core comprising a first end plate, a second end plate and a winding column, the number of the first through holes being the same as the number of the winding columns, one winding column being arranged in one first through hole, the first end plate and the second end plate being oppositely arranged on the two sides of the circuit board substrate along the thickness direction of the circuit board substrate, and the two ends of the winding column being connected to the first end plate and the second end plate respectively; a conductor arranged around the winding column.

2. The magnetic assembly according to claim 1, wherein: the circuit board substrate is provided with a plurality of second through holes penetrating the circuit board substrate along the thickness direction of the circuit board substrate, the magnetic core comprises a common column, the two ends of the common column being connected to the first end plate and the second end plate respectively, and the number of the second through holes being the same as the number of the common columns, one common column being arranged in one second through hole.

3. The magnetic assembly according to claim 2, wherein: the shape of the first through hole matches the shape of the winding column, and / or the shape of the second through hole matches the shape of the common column.

4. The magnetic assembly according to claim 1, wherein: the first end plate is adhesively fixed to the circuit board substrate along the thickness direction of the circuit board substrate and towards the surface of the circuit board substrate; and / or the second end plate is adhesively fixed to the circuit board substrate along the thickness direction of the circuit board substrate and towards the surface of the circuit board substrate.

5. The magnetic assembly according to claim 1, wherein: the magnetic core comprises a first part and a second part arranged oppositely along the thickness direction of the circuit board substrate, and the first part is adhesively fixed to the second part.

6. The magnetic assembly according to claim 1, wherein: the circuit board substrate is provided with a pin, one end of the pin being electrically connected to one end of the conductor, and the other end of the pin being used for plugging into the plugging interface of other equipment.

7. The magnetic assembly according to any one of claims 1-6, wherein: the conductor comprises a conductive circuit arranged on the circuit board substrate; or the conductor comprises a conductive row arranged around the part of the winding column outside the first through hole.

8. The magnetic assembly according to any one of claims 1-5, wherein: the conductor comprises a conductive circuit arranged on the circuit board substrate and a conductive row arranged around the part of the winding column outside the first through hole, and the conductive row is electrically connected to the corresponding conductive circuit of the winding column.

9. The magnetic assembly according to claim 8, wherein: the circuit board substrate is provided with a third through hole penetrating the circuit board substrate along the thickness direction of the circuit board substrate, and the inner wall of the third through hole is provided with a metal layer connected to the corresponding conductive circuit of the winding column surrounded by the conductive row. An end of the conductive row is provided with a connecting hole; The magnetic assembly comprises a mounting column, a first end of the mounting column is sequentially threaded through the third through hole and the connecting hole, and the first end of the mounting column is welded to the metal layer and the connecting hole respectively to be electrically connected with the conductive circuit and the conductive row respectively, and a second end of the mounting column is provided with a threaded connection part for being electrically connected with other equipment through threading.

10. The magnetic assembly according to any one of claims 1-6, wherein, The number of the magnetic cores is three, one of the magnetic cores and the conductor constitute a DC-DC circuit inductor, another of the magnetic cores and the conductor constitute a PFC circuit inductor, and the other of the magnetic cores and the conductor constitute a transformer of a resonant converter.

11. The magnetic assembly according to claim 10, wherein, The magnetic core of the DC-DC circuit inductor comprises one common column and two winding columns, the common column is threaded through the circuit board substrate, the common column is arranged between the two winding columns, the conductor comprises two groups of conductive circuits respectively wound around the two winding columns and two conductive rows respectively wound around the two winding columns, the conductive circuits are arranged on the circuit board substrate, and the conductive rows are wound around the portions of the winding columns located outside the first through hole.

12. The magnetic assembly according to claim 10, wherein, The magnetic core of the PFC circuit inductor comprises two winding columns arranged oppositely and two common columns arranged oppositely between the two winding columns, the common columns are threaded through the circuit board substrate, and the conductor comprises two groups of conductive circuits respectively wound around the two winding columns, the conductive circuits being arranged on the circuit board substrate.

13. The magnetic assembly according to claim 10, wherein, The magnetic core of the transformer of the resonant converter comprises three winding columns and six common columns, the common columns are threaded through the circuit board substrate, the three winding columns are sequentially arranged, and every two common columns are arranged on both sides of one winding column in a direction perpendicular to the arrangement direction of the winding columns, the conductor comprises three groups of conductive circuits respectively wound around the three winding columns, and the conductive circuits are arranged on the circuit board substrate.

14. An electronic device, comprising: The electronic device comprises the magnetic assembly according to any one of claims 1-13.

15. The electronic device according to claim 14, wherein, The electronic device comprises a shell and an elastic pressing sheet, the circuit board substrate is fixed to the shell, the shell has a support surface arranged opposite to the circuit board substrate in a thickness direction of the circuit board substrate, and the support surface bears the second end plate; one end of the elastic pressing sheet is fixed to the shell, and the other end of the elastic pressing sheet abuts against a surface of the first end plate away from the support surface in a direction toward the support surface, so as to press the magnetic core toward the support surface.

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