Integrated electromagnetic shielding filter

Abstract

The utility model discloses an integrated electromagnetic shielding filter which comprises a magnetic core, a capacitor, an upper cover plate, a lower cover plate and an inductor. The magnetic core is arranged in the accommodating cavity of the capacitor, and the upper cover plate and the lower cover plate respectively cover the upper opening and the lower opening of the accommodating cavity of the capacitor; a first side connecting electrode and a second side connecting electrode are respectively embedded in two sides of the capacitor; a first lower connecting electrode, a second lower connecting electrode, a third lower connecting electrode and a fourth lower connecting electrode are respectively embedded in the lower cover plate; and the inductor is embedded in the magnetic core. The capacitor is arranged on the side face of the cylindrical inductor in a surrounding mode, the upper cover plate and the lower cover plate are arranged at the upper end and the lower end of the capacitor respectively in a covering mode, a good electromagnetic shielding effect is achieved, a magnetic field of the inductor is prevented from interfering with other elements, flexible switching of different connection modes of the inductor and the capacitor can be achieved through connection modes of different electrodes, and use is convenient. And a stable and efficient filter structure is formed.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and in particular to an integrated electromagnetic shielding filter. Background Technology

[0002] With the rapid development of electronic devices, especially in fields such as communications, automotive electronics, and consumer electronics, electromagnetic interference (EMI) problems are becoming increasingly prominent. Modern electronic products require increasingly higher levels of electromagnetic compatibility (EMC) to ensure stable operation between different devices. Therefore, developing electronic components with efficient electromagnetic shielding and the ability to integrate more functions is particularly important.

[0003] Most existing filter designs use separate inductors and capacitors, which are mounted separately on the circuit board. Although this approach can achieve the filtering effect, the overall circuit occupies a large area. Furthermore, because the inductors and capacitors are arranged separately, parasitic inductance and capacitance will increase. Especially when operating at high frequencies, the performance of the filter will be affected. The magnetic field generated by the inductor can easily interfere with other electronic components in the vicinity, leading to a decrease in the overall circuit performance.

[0004] Therefore, there is an urgent need for an integrated electromagnetic shielding filter to overcome the above-mentioned defects. Utility Model Content

[0005] In view of the above problems, this utility model is proposed to provide an integrated electromagnetic shielding filter that overcomes or at least partially solves the above problems.

[0006] This utility model provides an integrated electromagnetic shielding filter, which includes: a magnetic core, a capacitor, an upper cover plate, a lower cover plate, and an inductor.

[0007] The capacitor is a hollow cylindrical structure with openings at the top and bottom. The magnetic core is disposed inside the cavity of the capacitor. The upper cover plate and the lower cover plate are respectively covered at the upper and lower openings of the cavity of the capacitor.

[0008] The capacitor has a first side connection electrode and a second side connection electrode embedded on both sides respectively.

[0009] The lower cover plate is embedded with four non-communicating electrodes, namely the first lower connecting electrode, the second lower connecting electrode, the third lower connecting electrode and the fourth lower connecting electrode. The first side connecting electrode is electrically connected to the first lower connecting electrode, and the second side connecting electrode is electrically connected to the second lower connecting electrode.

[0010] The inductor is embedded in the magnetic core. The inductor includes a first connection end and a second connection end. The first connection end and the second connection end extend to the bottom of the magnetic core, and the first connection end is electrically connected to the fourth lower connection electrode, and the second connection end is electrically connected to the third lower connection electrode.

[0011] Optionally, the first side connecting electrode and the second side connecting electrode are arranged opposite to each other.

[0012] Optionally, the first lower connecting electrode and the second lower connecting electrode are arranged opposite to each other, and the positions of the first lower connecting electrode and the second lower connecting electrode correspond to the positions of the first side connecting electrode and the second side connecting electrode, respectively.

[0013] Optionally, the third lower connecting electrode and the fourth lower connecting electrode are arranged opposite to each other.

[0014] Optionally, the axial connecting line between the third lower connecting electrode and the fourth lower connecting electrode is perpendicular to the axial connecting line between the first lower connecting electrode and the second lower connecting electrode.

[0015] Optionally, the positions of the first connection end and the second connection end correspond to the positions of the fourth lower connection electrode and the third lower connection electrode, respectively.

[0016] Optionally, the first side connecting electrode, the second side connecting electrode, the first lower connecting electrode, the second lower connecting electrode, the third lower connecting electrode, and the fourth lower connecting electrode are all made of electroplated copper-nickel-tin.

[0017] Optionally, the upper cover plate and the lower cover plate are respectively fixedly connected to the capacitor by adhesive bonding.

[0018] The technical solution provided in this embodiment of the utility model has at least the following technical effects or advantages:

[0019] The integrated electromagnetic shielding filter described in this embodiment of the invention has a better electromagnetic shielding effect by surrounding the side of a cylindrical inductor with a capacitor and covering the upper and lower ends of the capacitor with an upper cover plate and a lower cover plate, respectively. This prevents the magnetic field of the inductor from interfering with other components. At the same time, by connecting different electrodes, different connection modes of the inductor and capacitor can be flexibly switched to form a stable and efficient filter structure. The overall structure is compact, highly integrated, and has good application prospects.

[0020] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is an exploded structural diagram of the integrated electromagnetic shielding filter described in this utility model;

[0023] Figure 2 for Figure 1 Perspective view;

[0024] Figure 3 This is a schematic diagram of the installation structure of the integrated electromagnetic shielding filter described in this utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Magnetic core; 2. Capacitor; 3. Upper cover plate; 4. Lower cover plate; 5. First side connecting electrode; 6. Second side connecting electrode; 7. First lower connecting electrode; 8. Second lower connecting electrode; 9. Third lower connecting electrode; 10. Fourth lower connecting electrode; 11. Receptacle cavity; 12. Inductor; 13. First connecting terminal; 14. Second connecting terminal. Detailed Implementation

[0027] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings.

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The accompanying drawings show preferred embodiments of the present invention. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0029] Unless otherwise specified, all raw materials, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0030] Figure 1 This is an exploded view of the integrated electromagnetic shielding filter described in this utility model. Figure 2 for Figure 1 Perspective view, Figure 3This is a schematic diagram of the installation structure of the integrated electromagnetic shielding filter described in this utility model. (See attached diagram) Figure 1-3 As shown, the integrated electromagnetic shielding filter includes a magnetic core 1, a capacitor 2, an upper cover plate 3, a lower cover plate 4, and an inductor 12. The capacitor 2 is a hollow cylindrical structure with openings at the top and bottom. The middle region of the hollow cylindrical structure forms a cavity 11, and the magnetic core 1 is disposed inside the cavity 11 of the capacitor 2. The upper cover plate 3 and the lower cover plate 4 are respectively covering the upper and lower openings of the cavity 11 of the capacitor 2. A first side connecting electrode 5 and a second side connecting electrode 6 are respectively embedded on both sides of the capacitor 2. Four non-communicating electrodes are respectively embedded on the lower cover plate 4, namely a first lower connecting electrode 7, a second lower connecting electrode 8, a third lower connecting electrode 9, a fourth lower connecting electrode 10, a fifth lower connecting electrode 11, a sixth lower connecting electrode 11, a seventh lower connecting electrode 12, a 1 folding electrode 13, a 1 folding electrode 14, a 5 folding electrode 15, a 6 folding electrode 16, a 7 folding electrode 17, a 8 folding electrode 18, a 9 folding electrode 19, a 1 folding electrode 12, a 1 ... Electrode 8, third lower connecting electrode 9, and fourth lower connecting electrode 10 are provided. The first side connecting electrode 5 is electrically connected to the first lower connecting electrode 7, and the second side connecting electrode 6 is electrically connected to the second lower connecting electrode 8. The magnetic core 1 is embedded with the inductor 12, which includes two connection ports, namely a first connection end 13 and a second connection end 14. The first connection end 13 and the second connection end 14 extend to the bottom of the magnetic core 1, and the first connection end 13 is electrically connected to the fourth lower connecting electrode 10, and the second connection end 14 is electrically connected to the third lower connecting electrode 9.

[0031] Based on the structure of the integrated electromagnetic shielding filter, the capacitor 2 and inductor 12 can be connected in series, parallel, or in a shunt mode through different connection methods of external connecting lines or electrical components. For example, when the first lower connecting electrode 7 and the second lower connecting electrode 8 are connected by external connecting lines, and the third lower connecting electrode 9 and the fourth lower connecting electrode 10 are connected by external connecting lines, and the first lower connecting electrode 7 and the third lower connecting electrode 9 are respectively connected to the application circuit, the inductor 12 and capacitor 2 are in parallel mode in the application circuit. For example, when the first lower connecting electrode 7 and the second lower connecting electrode 8 are connected by external connecting lines, the inductor 12 and capacitor 2 are in series mode in the application circuit. For example, when the first lower connecting electrode 7 and the second lower connecting electrode 8 are connected by external connecting lines, and the third lower connecting electrode 9 and the fourth lower connecting electrode 10 are respectively connected to the application circuit, the inductor 12 and capacitor 2 are in a shunt mode in the application circuit.

[0032] In this embodiment of the invention, the first side connecting electrode 5 and the second side connecting electrode 6 are arranged opposite each other, thereby maximizing the distance between the two connecting electrodes and reducing the risk of short circuit.

[0033] Accordingly, the first lower connecting electrode 7 and the second lower connecting electrode 8 are arranged opposite each other, and the positions of the first lower connecting electrode 7 and the second lower connecting electrode 8 correspond to the positions of the first side connecting electrode 5 and the second side connecting electrode 6, respectively.

[0034] The third lower connecting electrode 9 and the fourth lower connecting electrode 10 are arranged opposite each other, and the axial connecting line between the third lower connecting electrode 9 and the fourth lower connecting electrode 10 is perpendicular to the axial connecting line between the first lower connecting electrode 7 and the second lower connecting electrode 8. This ensures that the connection stability between the electrodes is not affected and avoids problems such as short circuits caused by cross-connection.

[0035] The positions of the first connection terminal 13 and the second connection terminal 14 correspond to the positions of the fourth lower connection electrode 10 and the third lower connection electrode 9, respectively.

[0036] In this embodiment of the invention, the first side connecting electrode 5, the second side connecting electrode 6, the first lower connecting electrode 7, the second lower connecting electrode 8, the third lower connecting electrode 9, and the fourth lower connecting electrode 10 are all made of electroplated copper-nickel-tin, which provides better electrical signal transmission capability.

[0037] The upper cover plate 3 and the lower cover plate 4 are fixedly connected to the capacitor 2 by adhesive bonding. Both the upper cover plate 3 and the lower cover plate 4 are insulating alloys, which provide insulation and magnetic shielding protection.

[0038] The integrated electromagnetic shielding filter described in this embodiment of the invention has a better electromagnetic shielding effect by surrounding the side of the cylindrical inductor 12 with a capacitor 2, and covering the upper and lower ends of the capacitor 2 with an upper cover plate 3 and a lower cover plate 4, respectively. This avoids the magnetic field of the inductor 12 from interfering with other components. At the same time, by connecting different electrodes, different connection modes of the inductor 12 and the capacitor 2 can be flexibly switched, forming a stable and efficient filter structure. The overall structure is compact, highly integrated, and has good application prospects.

[0039] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0040] Similarly, it should be understood that, in order to simplify this disclosure and aid in understanding one or more of the various aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be construed as reflecting an intention that the claimed invention requires more features than expressly recited in each claim. Rather, as reflected in the claims, the inventive aspect lies in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of the invention.

[0041] It should be noted that the above embodiments are illustrative of the present invention and not restrictive of the present invention, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims.

Claims

1. An integrated electromagnetic shielding filter, characterized in that, The integrated electromagnetic shielding filter includes: a magnetic core, a capacitor, an upper cover plate, a lower cover plate, and an inductor; The capacitor is a hollow cylindrical structure with openings at the top and bottom. The magnetic core is disposed inside the cavity of the capacitor. The upper cover plate and the lower cover plate are respectively covered at the upper and lower openings of the cavity of the capacitor. The capacitor has a first side connection electrode and a second side connection electrode embedded on both sides respectively. The lower cover plate is embedded with four non-communicating electrodes, namely the first lower connecting electrode, the second lower connecting electrode, the third lower connecting electrode and the fourth lower connecting electrode. The first side connecting electrode is electrically connected to the first lower connecting electrode, and the second side connecting electrode is electrically connected to the second lower connecting electrode. The inductor is embedded in the magnetic core. The inductor includes a first connection end and a second connection end. The first connection end and the second connection end extend to the bottom of the magnetic core, and the first connection end is electrically connected to the fourth lower connection electrode, and the second connection end is electrically connected to the third lower connection electrode.

2. The integrated electromagnetic shielding filter according to claim 1, characterized in that: The first side connecting electrode and the second side connecting electrode are arranged opposite each other.

3. The integrated electromagnetic shielding filter according to claim 2, characterized in that: The first lower connecting electrode and the second lower connecting electrode are arranged opposite each other, and the positions of the first lower connecting electrode and the second lower connecting electrode correspond to the positions of the first side connecting electrode and the second side connecting electrode, respectively.

4. The integrated electromagnetic shielding filter according to claim 3, characterized in that: The third and fourth lower connecting electrodes are arranged opposite each other.

5. The integrated electromagnetic shielding filter according to claim 4, characterized in that: The axial connecting line between the third and fourth lower connecting electrodes is perpendicular to the axial connecting line between the first and second lower connecting electrodes.

6. The integrated electromagnetic shielding filter according to claim 5, characterized in that: The positions of the first connection end and the second connection end correspond to the positions of the fourth lower connection electrode and the third lower connection electrode, respectively.

7. The integrated electromagnetic shielding filter according to claim 1, characterized in that: The first side connecting electrode, the second side connecting electrode, the first lower connecting electrode, the second lower connecting electrode, the third lower connecting electrode, and the fourth lower connecting electrode are all made of electroplated copper-nickel-tin.

8. The integrated electromagnetic shielding filter according to claim 1, characterized in that: The upper cover plate and the lower cover plate are respectively fixedly connected to the capacitor by adhesive bonding.

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