Electromagnetic element and electric appliance module

Abstract

The utility model provides an electromagnetic element and an electric appliance module, which comprise a magnet, a shielding cover and a winding, the magnet wraps the winding, the magnet is provided with a bottom surface, a top surface and a side surface, two opposite sides of the side surface are respectively connected with the bottom surface and the top surface, the shielding cover wraps the side surface and the top surface, and the shielding cover is arranged in the direction from the bottom surface to the top surface. And the orthographic projection of the shielding cover outside the top surface is not overlapped with the orthographic projection of the bottom surface, so that the risk of electromagnetic leakage of the device is reduced.

Description

Technical Field

[0001] The present application relates to the field of inductance technology, and in particular to an electromagnetic component and an electrical module. Background Art

[0002] Electromagnetic components are important components in electronic circuits. They store and release magnetic field energy and adjust the voltage and current in the circuit as needed to achieve the conversion and transmission of electrical energy.

[0003] Electromagnetic components are also commonly used in on-board electronic systems such as automobiles. However, the electromagnetic components used in automobiles usually have high requirements for their electromagnetic radiation. The existing electromagnetic components have no shielding covers on the sides, resulting in serious electromagnetic leakage, which in turn fails to meet the requirements of on-board electronic systems such as automobiles. Utility Model Content

[0004] In view of this, the present application provides an electromagnetic component and an electrical module to reduce the risk of electromagnetic leakage in the device.

[0005] The present application provides an electromagnetic component, including a magnet, a shielding cover and a winding, wherein the magnet wraps the winding, the magnet has a bottom surface, a top surface and a side surface, the opposite sides of the side surface are respectively connected to the bottom surface and the top surface, the shielding cover is covered on the side surface and the top surface, and in the direction from the bottom surface toward the top surface, the orthographic projection of the shielding cover located outside the top surface does not overlap with the orthographic projection of the bottom surface.

[0006] In some embodiments, a protrusion is disposed at one end of the shielding cover away from the top surface, the protrusion protrudes from the bottom surface, and the protrusion extends from the top surface toward the bottom surface.

[0007] In some embodiments, a distance between an end of the protrusion facing away from the top surface and the bottom surface is greater than 0 and less than or equal to 5 mm.

[0008] In some embodiments, a protrusion is provided at one end of the shielding cover facing away from the top surface, and the protrusion extends from the side surface of the magnet toward the shielding cover located on the side surface.

[0009] In some embodiments, the electromagnetic element further includes a patch electrode connected to the winding and disposed on the bottom surface, and a distance between a surface of the shielding cover facing away from the top surface and a surface of the patch electrode located on the bottom surface facing away from the top surface is less than 0.3 mm.

[0010] In some embodiments, the shielding cover located on the side is provided with a notch, the notch exposes the side of the magnet, the electromagnetic element also includes a patch electrode connected to the winding, the patch electrode is arranged in the notch and on the bottom surface, and the patch electrode is spaced apart from the shielding cover, and the patch electrode and the notch are arranged one-to-one.

[0011] In some embodiments, the distance between the exposed conductor portion of the patch electrode located in the notch and the shielding cover is greater than or equal to 0.05 mm.

[0012] In some embodiments, a distance between a surface of the patch electrode located at the notch and a surface of the shielding cover located at the side surface is less than or equal to 0.5 mm.

[0013] The present application also provides an electrical module, comprising a circuit board and the electromagnetic element as described above, wherein the patch electrode and the shielding cover in the electromagnetic element are electrically connected to the circuit board.

[0014] The present application provides an electromagnetic component and an electrical module, including a magnet, a shielding cover and a winding, wherein the magnet wraps the winding, the magnet has a bottom surface, a top surface and a side surface, the opposite sides of the side surface are respectively connected to the bottom surface and the top surface, the shielding cover is wrapped on the side surface and the top surface, and in the direction from the bottom surface to the top surface, the orthographic projection of the shielding cover outside the top surface does not overlap with the orthographic projection of the bottom surface, so as to reduce the risk of electromagnetic leakage of the device. In the present application, by arranging the shielding cover on the side surface and the top surface of the magnet, so that the area of ​​the magnet except the bottom surface is completely wrapped in the shielding cover, the induced current generated by the shielding cover can generate a reverse magnetic field to offset the original magnetic field, thereby achieving the purpose of reducing the risk of electromagnetic leakage of the device and improving the reliability of the electromagnetic component. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a schematic diagram from one perspective of a first three-dimensional structure of an electromagnetic element provided by the present application;

[0017] Figure 2 is a schematic diagram from another perspective of the first three-dimensional structure of the electromagnetic element provided by the present application;

[0018] Figure 3 yes Figure 2Schematic diagram of the cross-sectional structure of the electromagnetic element along line AB;

[0019] Figure 4 yes Figure 1 A schematic diagram of a three-dimensional structure of an electromagnetic component without a shielding cover;

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the winding, patch electrodes and part of the magnet provided by the present application;

[0021] Figure 6 is a second three-dimensional structural schematic diagram of the electromagnetic element provided by the present application;

[0022] Figure 7 It is a third three-dimensional structural schematic diagram of the electromagnetic element provided by the present application;

[0023] Figure 8 It is a schematic diagram from one perspective of a first three-dimensional structure of an electrical module provided by the present application;

[0024] Fig. 9 is a schematic diagram from another perspective of the first three-dimensional structure of the electrical module provided by the present application;

[0025] Fig.10 This is a second three-dimensional structural diagram of the electrical module provided by the present application;

[0026] Fig.11 This is a third three-dimensional structural schematic diagram of the electrical module provided in this application.

[0027] Reference numerals:

[0028] 10. Electromagnetic component; 20. Circuit board; 21. Connection hole; 30. Electrical module; 100. Magnet; 110. Bottom surface; 120. Top surface; 130. Side surface; 140. Groove; 200. Shielding cover; 210. Notch; 220. Protrusion; 230. Recess; 300. Winding; 310. Lead end; 400. Patch electrode; 410. First electrode portion; 420. Second electrode portion; 430. Third electrode portion. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application are clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. In the absence of conflict, the following embodiments and their technical features can be combined with each other.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the description of the present application, the meaning of "several" is at least one, such as one, two, etc., unless otherwise clearly and specifically defined.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by a person skilled in the art to which this application belongs. The terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more related listed items. The terms "connection", "electrical connection", and "electrical connection" used herein include any direct and indirect electrical or structural connection means. Therefore, if the text describes a first device coupled / connected / electrically connected to a second device, it means that the first device can be directly electrically / structurally connected to the second device, or indirectly electrically / structurally connected to the second device through other devices or connection means.

[0032] The present application provides an electromagnetic component, including a magnet, a shielding cover and a winding, wherein the magnet wraps the winding, and the magnet has a bottom surface, a top surface and a side surface, and the opposite sides of the side surface are respectively connected to the bottom surface and the top surface, and in the direction from the bottom surface toward the top surface, the orthographic projection of the shielding cover located outside the top surface does not overlap with the orthographic projection of the bottom surface.

[0033] In the present application, a shielding cover is provided on the side and top surface of the magnet, that is, no shielding cover is provided on the bottom surface of the magnet, so that the entire area of ​​the magnet except the bottom surface is wrapped in the shielding cover, so that the induced current generated by the shielding cover can generate a reverse magnetic field to offset the original magnetic field, thereby achieving the purpose of reducing the risk of electromagnetic leakage in the device and improving the reliability of the electromagnetic component.

[0034] See also Figure 1-Figure 6 , Figure 1 It is a schematic diagram from one perspective of a first three-dimensional structure of an electromagnetic element provided by the present application; Figure 2 is a schematic diagram from another perspective of the first three-dimensional structure of the electromagnetic element provided by the present application; Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of the electromagnetic element along line AB;

[0035] Figure 4 yes Figure 1 A schematic diagram of a three-dimensional structure of an electromagnetic component without a shielding cover; Figure 5Schematic diagram of the three-dimensional structure of the winding, patch electrode and part of the magnet provided by the present application. The present application provides an electromagnetic component 10, including a magnet 100, a shielding cover 200, a winding 300 and a patch electrode 400.

[0036] The winding 300 is formed by winding a round wire or a flat wire. In this embodiment, the winding 300 is formed by winding a round wire. The winding 300 includes a main coil and a lead-out terminal 310 connected to an end of the main coil.

[0037] The magnet 100 has a bottom surface 110 , a top surface 120 and a side surface 130 . Two opposite sides of the side surface 130 are respectively connected to the bottom surface 110 and the top surface 120 . The magnet 100 wraps the winding 300 . Specifically, the magnet 100 has a bottom surface 110, a top surface 120 and a side surface 130, and the opposite sides of the side surface 130 are respectively connected to the bottom surface 110 and the top surface 120, and the side surface 130 is formed by connecting a plurality of side surfaces. The materials forming the magnet 100 include magnetic material and resin; the resin includes at least one of epoxy polyimide and liquid crystal polymer, but is not limited thereto; the magnetic material can be ferrite or metal magnetic powder particles; the ferrite powder particles include at least one of Mg-Zn-based ferrite, Mn-Zn-based ferrite, Mn-Mg-based ferrite, Cu-Zn-based ferrite, Mg-Mn-Sr-based ferrite and Ni-Zn-based ferrite, hexagonal ferrite such as Ba-Zn-based ferrite, Ba-Mg-based ferrite, Ba-Ni-based ferrite and Ba-Co-based ferrite. The metal magnetic powder particles include at least one of iron (Fe), silicon (Si), chromium (Cr), cobalt (Co), molybdenum (Mo), aluminum (Al), niobium (Nb), copper (Cu) and nickel (Ni); the magnet 100 includes a magnetic column, a first magnetic core, a second magnetic core and a third magnetic core, the magnetic column, the first magnetic core, the second magnetic core and the third magnetic core are pressed and formed in steps, the winding 300 is wound on the magnetic column, the end of the magnetic column is connected to the first magnetic core, the second magnetic core is arranged around the first magnetic core, the third magnetic core is arranged on the outside of the winding 300 away from the magnetic core and on the side of the magnetic column away from the first magnetic core, and the third magnetic core is also filled between the wires of the winding 300 and between the wires of the winding 300 and the magnetic column, that is, the main coil of the winding 300 and the lead-out end 310 are wrapped in the magnet 100; the magnetic column, the first magnetic core, the second magnetic core and the third magnetic core can be formed of the same material or different materials. Optionally, the first magnetic core may be integrally pressed together with the second magnetic core, or the first magnetic core, the second magnetic core and the magnetic column may be integrally pressed together.

[0038] The shielding cover 200 is covered on the side surface 130 and the top surface 120, that is, the shielding cover 200 covers the area of ​​the magnet 100 except the bottom surface 110, and in the direction from the bottom surface 110 to the top surface 120, the orthographic projection of the shielding cover 200 outside the top surface 120 does not overlap with the orthographic projection of the bottom surface 110. Further, a protrusion 220 is provided at one end of the shielding cover 200 away from the top surface 120, and the protrusion 220 protrudes from the bottom surface 110, and the protrusion 220 extends from the top surface 120 to the bottom surface 110, that is, the protrusion 220 does not bend or extend toward the side surface 130 of the magnet 100 from the shielding cover 200 located at the side surface 130, that is, in the direction from the top surface 120 to the bottom surface 110, the orthographic projection of the protrusion 220 does not overlap with the orthographic projection of the magnet 100.

[0039] In one embodiment, the distance L between the end of the protrusion 220 away from the top surface 120 and the bottom surface 110 is greater than 0 and less than or equal to 5 mm. Specifically, the distance L between the end of the protrusion 220 away from the top surface 120 and the bottom surface 110 can be 0.1 mm, 0.3 mm, 0.5 mm, 0.7 mm, 0.9 mm, 1.6 mm, 2.4 mm, 2.9 mm, 3.4 mm, 4.8 mm or 5 mm.

[0040] In the present application, by setting the distance L between the end of the protrusion 220 facing away from the top surface 120 and the surface of the bottom surface 110 within this range, when the protrusion 220 is connected to the circuit board, the protrusion 220 can pass through the connecting hole to better connect with the circuit board, avoiding the risk of the shielding cover 200 moving or falling off, thereby improving the shielding performance of the electromagnetic component 10 and further improving the reliability of the electromagnetic component 10.

[0041] In one embodiment, the shielding cover 200 located on the side 130 is provided with a notch 210 , the notch 210 exposes the side 130 of the magnet 100 , the patch electrode 400 is connected to the winding 200 , and the patch electrode 400 is arranged in the notch 210 and on the bottom surface 100 and spaced apart from the shielding cover 200 . Specifically, the shielding cover 200 can be made of metal or magnetic powder, the shielding cover 200 is provided with at least two gaps 210 arranged at intervals, the protrusion 220 is arranged at the end of the shielding cover 200 away from the top surface 120 and in the area where the gap 210 is not provided, the patch electrodes 400 are arranged one by one with the gaps 210, the gaps 210 are located on the side 130 of the magnet 100, each patch electrode 400 is connected to the lead-out end 310 of a winding 300, each patch electrode 400 includes a first electrode portion 410, a second electrode portion 420 and a third electrode portion 430, and the opposite ends of the first electrode portion 410 are respectively connected to the second electrode portion 420 and the third electrode portion 430. The patch electrode 400 is connected to the lead-out terminal 310, the first electrode portion 410 is located on the side 130 of the magnet 100, and the first electrode portion 410 is located on the magnet 100 exposed by the notch 210, that is, a part of the patch electrode 400 is arranged on the magnet 100 exposed by the notch 210, the second electrode portion 420 is located on the bottom surface 110 of the magnet 100, the third electrode portion 430 extends into the magnet 100 and is located between the second magnetic core and the third magnetic core, the third electrode portion 430 is connected to the lead-out terminal 310, the patch electrode 400 is first pressed and then connected to the lead-out terminal 310, and the first electrode portion 410, the second electrode portion 420 and the third electrode portion 430 are an integrally formed structure. Optionally, the positions of the two notches 210 can be symmetrically arranged or not. In this embodiment, the symmetrical arrangement of the positions of the two notches 210 is used as an example for explanation.

[0042] In another embodiment, the patch electrode 400 may be only arranged on the bottom surface 110, and no notch 210 is provided on the side surface 130 to accommodate the patch electrode 400, that is, the shielding cover 200 completely covers the entire side surface 130 of the magnet 100, thereby avoiding a gap between the patch electrode 200 and the shielding cover 200 due to the notch 210 being provided in the shielding cover 200 on the side surface 130 to accommodate the exposed patch electrode 400, thereby reducing the risk of electromagnetic leakage and improving the shielding performance of the electromagnetic component.

[0043] In one embodiment, the spacing R between the exposed conductor portion of the patch electrode 300 located at the notch 210 and the shielding cover 200 is greater than or equal to 0.05 mm, that is, the spacing R between the exposed conductor portion of the first electrode portion 410 located at the side 130 and the shielding cover 200 located at the side 130 is greater than or equal to 0.05 mm. Optionally, the spacing R between the exposed conductor portion of the first electrode portion 410 located at the side 130 and the shielding cover 200 located at the side 130 may be 0.05 mm, 0.08 mm, 0.1 mm, 0.13 mm, 0.19 mm, 0.26 mm, or 0.31 mm, etc. In the present application, the spacing R between the exposed conductor portion of the patch electrode 400 located on the side 130 and the shielding cover 200 located on the side 130 is set to be greater than or equal to 0.05 mm to avoid electrical connection between the exposed conductor portion of the patch electrode 400 and the shielding cover 200, while reducing the influence of parasitic capacitance, thereby further improving the reliability of the electromagnetic component 10.

[0044] In one embodiment, a plurality of protrusions 220 are arranged at intervals on both sides of the patch electrode 400, and all extend from the top surface 120 toward the bottom surface 110. When the protrusions 220 are connected to the circuit board, the protrusions 220 pass through the connection holes to be located on the surface of the circuit board away from the top surface 120. Specifically, the number of protrusions 220 arranged on both sides of the patch electrode 400 can be 2, 3, 5 or 7, etc. In this embodiment, the example of 3 protrusions 220 arranged on both sides of the patch electrode 400 is used for description. Optionally, the protrusions 220 on both sides of the patch electrode 400 can be symmetrically arranged or not. In this embodiment, the example of symmetrically arranged protrusions 220 on both sides of the patch electrode 400 is used for description, so as to further increase the connection strength between the two, avoid the risk of movement or falling off of the components, thereby improving the shielding performance of the electromagnetic component 10, and further improving the reliability of the electromagnetic component 10.

[0045] In one embodiment, the distance between the surface of the patch electrode 400 located at the notch 210 and the surface of the shielding cover 200 located at the side 130 is less than or equal to 0.5 mm. Specifically, the distance between the surface of the first electrode portion 410 located at the side 130 and the surface of the shielding cover 200 located at the side 130 can be 0 mm, 0.05 mm, 0.07 mm, 0.1 mm, 0.17 mm, 0.36 mm, 0.44 mm or 0.5 mm, etc. In the present application, by setting the distance between the surface of the patch electrode 400 located at the notch 210 and the surface of the shielding cover 200 located at the side 130 within this range, the risk of damage to the patch electrode 400 during transportation or use is avoided, and at the same time, the shielding cover 200 is further improved to prevent the leakage and interference of electromagnetic radiation, thereby further improving the reliability of the electromagnetic element 10.

[0046] In one embodiment, a groove 140 is disposed on the magnet 100 located on the bottom surface 110 , and the second electrode portion 420 is disposed in the groove 140 to accommodate the second electrode portion 420 , thereby reducing the use of fixing elements.

[0047] In one embodiment, a recessed portion 230 is provided on one side of the shielding cover 200 close to the bottom surface 110 and close to the patch electrode 400 for easy maintenance.

[0048] In the present application, a shielding cover 200 is provided on the side surface 130 and the top surface 120 of the magnet 100, that is, the shielding cover 200 is not provided on the bottom surface 110 of the magnet 100, so that the area of ​​the magnet 100 other than the bottom surface 110 is completely wrapped in the shielding cover 200, so that a reverse magnetic field can be generated by the induced current generated by the shielding cover 200 to offset the original magnetic field, thereby achieving the purpose of reducing electromagnetic leakage, improving the reliability of the electromagnetic component 10, and at the same time, reducing the electromagnetic interference of the electromagnetic component 10 to other devices; in addition, by wrapping the area of ​​the magnet 100 other than the bottom surface 110 in the shielding cover 200, the risk of damage to the magnet 100 due to external force during use or transportation of the electromagnetic component 10 is avoided, thereby further improving the reliability of the electromagnetic component 10; in addition, the shielding cover 200 is not provided on the bottom surface 110 of the magnet 100, and the operation is simpler, thereby reducing the processing difficulty and processing cost of the device, that is, improving the processing efficiency of the device and reducing the cost.

[0049] See also Figure 6 , Figure 6 : is a schematic diagram of the second three-dimensional structure of the electromagnetic element provided in this application. It should be noted that the difference between the second structure and the first structure is that:

[0050] The protrusion 220 extends from the side 130 of the magnet 100 toward the shielding cover 200 located at the side 130. Further, a plurality of protrusions 220 are provided at intervals on both sides of the patch electrode 400, and all extend from the side 130 of the magnet 100 toward the shielding cover 200 located at the side 130. The plurality of protrusions 220 may be symmetrically arranged or may not be symmetrically arranged, which is not limited here. The other structures are the same as the first structure and will not be described here.

[0051] In one embodiment, the distance H between the surface of the protrusion 220 away from the top surface 120 and the surface of the second electrode portion 420 away from the top surface 120 is less than 0.3 mm. Specifically, the distance H between the surface of the protrusion 220 away from the top surface 120 and the surface of the second electrode portion 420 away from the top surface 120 can be 0 mm, 0.03 mm, 0.06 mm, 0.09 mm, 0.1 mm, 0.14 mm, 0.21 mm, 0.27 mm or 0.29 mm, etc.

[0052] In the present application, the protrusion 220 is set to extend from the side 130 of the magnet 100 toward the shielding cover 200 located on the side 130, so that when the protrusion 220 is connected to the circuit board, the contact area between the protrusion 220 and the circuit board can be increased, thereby improving the connection strength between the circuit board and the electromagnetic component 10, reducing the risk of the electromagnetic component 10 moving or falling off, and at the same time, the distance H between the surface of the protrusion 220 away from the top surface 120 and the surface of the second electrode portion 420 away from the top surface 120 is set within the above range to ensure a flat surface between the protrusion 220 and the second electrode portion 420, thereby avoiding warping when subsequently soldered to the circuit board.

[0053] See also Figure 7 , Figure 7 This is a schematic diagram of the third three-dimensional structure of the electromagnetic element provided in this application. It should be noted that the difference between the third structure and the first structure is that:

[0054] The end of the shielding cover 200 facing away from the top surface 120 is not provided with the protrusion 220, and the distance L between the surface of the shielding cover 200 facing away from the top surface 120 and the surface of the patch electrode 400 located on the bottom surface 110 facing away from the top surface 120 is less than 0.3 mm. Specifically, the distance L between the surface of the shielding cover 200 facing away from the top surface 120 and the surface of the second electrode portion 420 facing away from the top surface 120 is less than 0.3 mm, and the distance L between the surface of the shielding cover 200 facing away from the top surface 120 and the surface of the second electrode portion 420 facing away from the top surface 120 can be 0.03 mm, 0.06 mm, 0.09 mm, 0.1 mm, 0.14 mm, 0.21 mm, 0.27 mm or 0.29 mm, etc. The other structures are the same as the first structure and are not repeated here.

[0055] In the present application, the distance L between the surface of the shielding cover 200 facing away from the top surface 120 and the surface of the second electrode portion 420 facing away from the top surface 120 is set within the above range to ensure a flat surface between the shielding cover 200 and the second electrode portion 420, thereby avoiding warping during subsequent soldering to a circuit board.

[0056] See also Figure 8 and Fig. 9 , and please continue to see Figure 1-Figure 5 , Figure 8 It is a schematic diagram from one perspective of a first three-dimensional structure of an electrical module provided by the present application; Fig. 9 2 is another perspective diagram of the first three-dimensional structure of the electrical module provided by the present application. The present application also provides an electrical module, including a circuit board and an electromagnetic component 10 provided by the present application, wherein the patch electrode 400 and the shielding cover 200 in the electromagnetic component 10 are both electrically connected to the circuit board 20. Specifically, the circuit board 20 has a connection hole 21 that penetrates the circuit board 20, and the protrusion 220 passes through the connection hole 21. The circuit board 20 can be any one of a rigid circuit board (printed circuit board PCB), a flexible circuit board (flexible printed circuit board FCB), a rigid-flexible printed circuit board (rigid-flexible printed circuit board RFCB) and a ceramic circuit board 20. The circuit board 20 has a pad, and the pad is used to be electrically connected to the shielding cover 200 on the electromagnetic component 10. Further, the protrusion 220 is electrically connected to the pad on the circuit board 20, and the connection between the protrusion 220 and the pad can be electrically connected to the pad with a conductive glue or glue after the patch electrode 400 is reflowed, or can be soldered to the pad together when the patch electrode 400 is reflowed.

[0057] In the present application, a connection hole 21 is provided on the circuit board 20 so that the connection hole 21 can better engage with the protrusion 220, thereby increasing the connection strength between the two and avoiding the risk of movement or falling off of the components, thereby ensuring the shielding performance of the electromagnetic component 10 while improving the reliability of the electrical module 30.

[0058] See also Fig.10 , and please continue to see Figure 6 , Fig.10 This is a schematic diagram of the second three-dimensional structure of the electrical module provided in this application. It should be noted that the difference between the second structure and the first structure is that:

[0059] The circuit board 20 is not provided with a connection hole 21, and the protrusion 220 extends from the side 130 of the magnet 100 toward the direction of the shielding cover 200 located at the side 130, and the protrusion 220 is connected to the surface of the circuit board 20 close to the top surface 120, that is, the protrusion 220 does not pass through the connection hole 21. Further, a plurality of protrusions 220 are provided at intervals on both sides of the patch electrode 400, and extend from the side 130 of the magnet 100 toward the direction of the shielding cover 200 located at the side 130, and the other structures are the same as the first structure, which will not be repeated here.

[0060] In one embodiment, the distance H between the surface of the protrusion 220 away from the top surface 120 and the surface of the second electrode portion 420 away from the top surface 120 is less than 0.3 mm. Specifically, the distance H between the surface of the protrusion 220 away from the top surface 120 and the surface of the second electrode portion 420 away from the top surface 120 can be 0 mm, 0.03 mm, 0.06 mm, 0.09 mm, 0.1 mm, 0.14 mm, 0.21 mm, 0.27 mm or 0.29 mm, etc.

[0061] See also Fig.11 , and please continue to see Figure 7 , Fig.11 This is a schematic diagram of the third three-dimensional structure of the electrical module provided in this application. It should be noted that the difference between the third structure and the first structure is that:

[0062] The circuit board 20 is not provided with a connection hole 21, and the distance L between the surface of the shielding cover 200 away from the top surface 120 and the surface of the patch electrode 400 located on the bottom surface 110 away from the top surface 120 is less than 0.3 mm, and one end of the shielding cover 200 away from the top surface 120 is connected to the surface of the circuit board 20 close to the top surface 120. Specifically, the distance L between the surface away from the top surface 120 away from the top surface 120 and the surface of the second electrode portion 420 away from the top surface 120 is less than 0.3 mm, and the distance L between the surface of the shielding cover 200 away from the top surface 120 and the surface of the second electrode portion 420 away from the top surface 120 can be 0 mm, 0.03 mm, 0.06 mm, 0.09 mm, 0.1 mm, 0.14 mm, 0.21 mm, 0.27 mm or 0.29 mm, etc. The other structures are the same as the first structure and are not repeated here.

[0063] In the present application, the distance L between the surface of the shielding cover 200 facing away from the top surface 120 and the surface of the second electrode portion 420 facing away from the top surface 120 is set within the above range to ensure a flat surface between the shielding cover 200 and the second electrode portion 420, thereby avoiding warping when subsequently soldered to the circuit board 20.

[0064] The present application provides an electromagnetic component 10 and an electrical module 30. By setting a shielding cover 200 on the side surface 130 and the top surface 120 of the magnet 100, that is, the bottom surface 110 of the magnet 100 is not provided with the shielding cover 200, so that the area of ​​the magnet 100 other than the bottom surface 110 is completely wrapped in the shielding cover 200, so that the induced current generated by the shielding cover 200 can generate a reverse magnetic field to offset the original magnetic field, thereby achieving the purpose of reducing electromagnetic leakage, improving the reliability of the electromagnetic component 10, and at the same time, reducing the electromagnetic interference of the electromagnetic component 10 to other devices; in addition, by wrapping the area of ​​the magnet 100 other than the bottom surface 110 in the shielding cover 200, the risk of damage to the magnet 100 due to external force during use or transportation of the electromagnetic component 10 is avoided, thereby further improving the reliability of the electromagnetic component 10. In addition, the shielding cover 200 is not set on the bottom surface 110 of the magnet 100, which is easier to operate, thereby reducing the processing difficulty and processing cost of the device, that is, improving the processing efficiency of the device and reducing the cost.

[0065] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structural or equivalent process transformations made using the contents of the specification and drawings of the present application, such as the mutual combination of technical features between the embodiments, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An electromagnetic component, characterized in that: It includes a magnet, a shielding cover and a winding, wherein the magnet wraps the winding, the magnet has a bottom surface, a top surface and a side surface, the opposite sides of the side surface are respectively connected to the bottom surface and the top surface, the shielding cover is covered on the side surface and the top surface, and in the direction from the bottom surface to the top surface, the orthographic projection of the shielding cover located outside the top surface does not overlap with the orthographic projection of the bottom surface.

2. The electromagnetic component according to claim 1, characterized in that A protrusion is disposed at one end of the shielding cover away from the top surface. The protrusion protrudes from the bottom surface and extends from the top surface toward the bottom surface.

3. The electromagnetic element according to claim 2, characterized in that The distance between the end of the protrusion facing away from the top surface and the bottom surface is greater than 0 and less than or equal to 5 mm.

4. The electromagnetic component according to claim 1, characterized in that A protrusion is provided at one end of the shielding cover which is away from the top surface. The protrusion extends from the side surface of the magnet toward the shielding cover located at the side surface.

5. The electromagnetic element according to claim 1 or 4, characterized in that: The electromagnetic element further includes a patch electrode connected to the winding and disposed on the bottom surface, and a distance between a surface of the shielding cover facing away from the top surface and a surface of the patch electrode on the bottom surface facing away from the top surface is less than 0.3 mm.

6. The electromagnetic component according to claim 1, characterized in that The shielding cover located on the side is provided with a notch, and the notch exposes the side of the magnet. The electromagnetic element also includes a patch electrode connected to the winding, and the patch electrode is arranged in the notch and on the bottom surface, and the patch electrode is spaced apart from the shielding cover.

7. The electromagnetic element according to claim 6, characterized in that The distance between the exposed conductor portion of the patch electrode located in the notch and the shielding cover is greater than or equal to 0.05 mm.

8. The electromagnetic element according to claim 6, characterized in that The distance between the surface of the patch electrode located at the notch and the surface of the shielding cover located at the side surface is less than or equal to 0.5 mm.

9. An electrical module, characterized in that: It comprises a circuit board and the electromagnetic element according to any one of claims 1 to 8, wherein the patch electrode and the shielding cover in the electromagnetic element are electrically connected to the circuit board.

Images