Shielding unit of filter, shielding body and filter module

Abstract

The utility model relates to the field of electromagnetic shielding, in particular to a shielding unit and a shielding body of a filter and a filter module. Comprising a shielding unit of the filter, the shielding unit is used for shielding electromagnetic waves generated by the filter located in the shielding unit, and the shielding unit comprises a shell and a cover plate; an opening is formed in the upper part of the shell, and the cover plate covers the opening in the upper part of the shell; the shell and / or the cover plate comprises a first connecting part and a second connecting part; wherein the first connecting part and the second connecting part are matched with each other, so that the two independent shielding units are combined. The design and research and development period of the power supply filter can be shortened; electromagnetic radiation generated by the power supply filter is shielded; internal parts of the shielding units are simple to replace, and the shielding units are electrically overlapped through the conductive rubber rings after being assembled, so that the shielding units are convenient to disassemble and assemble; the shielding units can be freely combined, and the number of the shielding units is increased.

Description

Technical Field

[0001] The present application relates to the field of electromagnetic shielding, and in particular to a shielding unit, a shielding body and a filter module of a filter. Background Art

[0002] At present, with the development of modernization, the electromagnetic protection index of equipment has been paid more and more attention by users. Even the electromagnetic protection index has become a necessary condition for procurement. The power filter plays a vital role in the electromagnetic protection of electronic equipment. The higher the index requirements of the equipment, the more time and energy it takes to develop its power filter. The power filter is composed of common mode, differential mode and other circuits constructed by capacitors, resistors, inductors, etc. Due to the particularity of electromagnetic protection, most of the power filter needs to be adjusted many times during the test process after the design is completed to meet the high index electromagnetic protection requirements. The existing power filter body is generally directly processed and matched according to the initial design parameters, and the power filter often cannot pass the high-level electromagnetic protection test at one time. The higher the index requirements, the more it needs to adjust the parameters continuously, and then continuously change and process the corresponding body, which greatly increases the development cycle of the filter.

[0003] The convenience of adjustment during filter testing and whether a new filter housing is needed to support the addition of new filter testing seriously affect the development cycle of power filters. It is necessary to improve the convenience of power filter device testing and adjustment processes, improve the scalability and combination convenience of power filter housings, and shorten the development cycle of power filters. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a shielding unit, a shielding body and a filter module of a filter.

[0005] The present application provides a shielding unit for a filter, which adopts the following technical solution:

[0006] In a first aspect, a shielding unit of a filter is provided, the shielding unit is used to shield electromagnetic waves generated by the filter located inside, and is characterized by comprising:

[0007] A shell and a cover plate; the shell has an opening at the top, and the cover plate covers the top opening of the shell; the shell and / or the cover plate include a first connecting component and a second connecting component;

[0008] The first connecting component and the second connecting component cooperate with each other to combine two independent shielding units.

[0009] Preferably, the first connecting member and the second connecting member are engaged with each other, the first connecting member is a protruding portion, and the second connecting member is a recessed portion;

[0010] And after being engaged, it is fixed by a first screw.

[0011] Preferably, the shell is connected to the edge of the cover plate by a second screw.

[0012] Preferably, the first connecting member and the second connecting member are arranged on two opposite sides or two adjacent sides of the bottom of the housing;

[0013] Alternatively, the first connecting component and the second connecting component are arranged on a side of the housing or a side of the cover plate.

[0014] In a second aspect, a shielding body of a filter is provided, comprising: a plurality of shielding units of the filter of the present application connected together;

[0015] The shielding unit of each filter is connected to the shielding unit of an adjacent filter via a first connecting component and a second connecting component; the surfaces of the shielding units of each filter that are opposite to the shell and are connected in series with the shell of the shielding unit of the adjacent filter or the surface connected with the external electrical component have openings, and the openings are used to connect the filter elements in the adjacent shells or the external electrical components.

[0016] Preferably, a through-hole capacitor is provided inside the opening.

[0017] Preferably, a first conductive rubber ring is provided on the edge of the opening.

[0018] Preferably, a second conductive rubber ring is further provided between the opening edge of the housing and the cover plate.

[0019] Preferably, the housing comprises a grounding opening in which a grounding screw is disposed.

[0020] In a third aspect, a filter module is also provided, comprising a shielding body of the filter of the present application; and a filter element; the filter element is arranged inside a shielding unit in the shielding body.

[0021] The technical solution of the present application includes at least one of the following beneficial technical effects:

[0022] 1. Greatly shorten the design and development cycle of power supply filters;

[0023] 2. Effectively shield the electromagnetic radiation generated by the power filter;

[0024] 3. It is easy to replace the internal parts of the shielding unit, and after the shielding unit is assembled, the conductive rubber ring forms an electrical connection between the units, which is convenient for disassembly and assembly;

[0025] 4. Shielding units can be freely combined to increase the number of shielding units. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the shielding units of the filter connected to each other;

[0027] Figure 2 It is an exploded view of the filter module after the shielding units of the filter are connected to each other.

[0028] Explanation of the reference numerals: 1. Shell; 2. Cover plate; 3. Opening; 4. Fixing screw; 5. Through-hole capacitor; 6. First conductive rubber ring; 7. Second conductive rubber ring; 8. Grounding screw; 9. Grounding opening; 10. Inductor; 11. X capacitor; 12. Y capacitor; 13. First connecting component; 14. Second connecting component. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of this application more clear, the following Figure 1-Figure 2 It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] The present application provides a filter shielding unit, a shielding body and a filter module, which adopt the following technical solutions:

[0031] First, as Figure 1 and Figure 2 As shown, the shielding unit of the filter of the present application is used to shield the electromagnetic waves generated by the filter, including: a shell 1 and a cover plate 2, the materials of the shell 1 and the cover plate 2 can be selected based on shielding effectiveness and mechanical strength, for example, metal materials such as steel, copper, aluminum and alloys thereof can be selected; the shell 1 has an opening at the top, the cover plate 2 covers the upper opening of the shell 1, and the shell 1 and the cover plate 2 are combined to form a filter housing; the shielding unit of the present application is provided with a first connecting component 13 and a second connecting component 14 on the side of its shell 1, specifically, the first connecting component 13 and the second connecting component 14 can cooperate with each other to combine two independent shielding units, specifically, in the present application, the mutual combination is achieved by snapping, and the mutual combination can also be achieved by other methods in the art, specifically, the first connecting component 13 is a protrusion, and the second connecting component 14 is a recessed portion, the two cooperate with each other, and the protrusion of the first connecting component 13 of one shielding unit can be embedded in the recessed portion of the second connecting component 14 of the other shielding unit, and then a detachable fastening connection is achieved by screws. Figure 1In one shielding unit, the first connecting component 13 and the second connecting component 14 are arranged on opposite sides of the bottom of the housing 1, but those skilled in the art can know that the first connecting component 13 and the second connecting component 14 can also be arranged on adjacent sides of the bottom of the housing 1, and the first connecting component 13 and the second connecting component 14 can also be arranged on the side of the housing 1 or the side of the cover plate 2. Further, Figure 1 In the embodiment, only one first connecting component 13 and one second connecting component 14 are provided on one shielding unit, but those skilled in the art will appreciate that multiple first connecting components 13 and multiple second connecting components 14 may also be provided to achieve a more secure connection. Through the above-mentioned design of the present application, the filter can be conveniently disassembled and adjusted during the filter test. If a new filter needs to be added, the original filter can be conveniently disassembled and combined through the housing, which can improve the convenience of the power filter device testing and adjustment process, improve the extensibility of the power filter housing and the convenience of combination, thereby shortening the development cycle of the power filter.

[0032] Second, as Figure 2As shown, a shielding body of a filter is provided, which is used to shield the electromagnetic waves generated by the filter, including: a plurality of shielding units of the filter as described in the previous technical solution connected together; the shielding unit of each filter is connected to the shielding unit of the adjacent filter by screw fastening using a first connecting component 13 and a second connecting component 14; further preferably, the surface of the housing 1 in each shielding unit of the filter, which is opposite to each other and connected in series with the housing 1 in the shielding unit of the adjacent filter or connected to the external electrical component, has M openings 3, and the M openings are used to connect the filter elements in the adjacent housing 1 or the external electrical elements. Specifically, each shielding unit includes a housing 1 and a cover plate 2; each housing 1 has an opening at the top, and each cover plate 2 covers the upper opening of the housing 1 in a one-to-one correspondence; each housing surface connected to the adjacent housing surface or the surface connected to the external electrical element has M openings 3, and the M openings 3 are used to connect the filter elements in the housing 1 of the adjacent shielding unit or the external electrical elements, and the specific value of M can be set as needed. The filter elements include inductors, capacitors, resistors, etc. In this application, the filter is used for power supply filtering. Since there are complex electromagnetic waves inside the power filter, in the existing production and life, the electromagnetic environment of the environment outside the filter will become very complex, which is not conducive to production and life. Therefore, the present application sets the power filter in the filter's warehouse. In addition, since the power filter needs to change parameters frequently in the design, and the warehouse is not easy to change the structure after the design, so in view of this problem, we design the warehouse to be a shell and a cover plate fixed with screws. In this way, it is convenient to change the parameters of the internal components of the filter while not repeatedly welding and splitting the warehouse. The shell 1 of the warehouse itself can shield electromagnetic waves, so it is very suitable as a material for the shielding body. The reason why multiple warehouses are connected together is also to achieve a better effect of shielding electromagnetic wave radiation. For example, if the power of the electromagnetic wave radiated by the power filter inside the first warehouse is large, and electromagnetic waves of a certain power can still be detected outside the first warehouse, then connecting the second warehouse will further attenuate the electromagnetic waves radiated by the power filter; the electromagnetic wave power detected outside the warehouse will be smaller. By analogy, by connecting multiple warehouses, the electromagnetic waves generated inside the warehouse can be prevented from radiating to the outside of the warehouse; and the electromagnetic waves outside the warehouse can also not interfere with the normal operation of the power filter inside the warehouse.

[0033] Preferably, each fixing component of the housing 1 adjacent to the opening is connected to the edge of the cover plate 2 via a fixing screw 4 .

[0034] Preferably, through-hole capacitors 5 are provided inside the M openings 3, which are used for the electrical connection of the filter elements in the housing 1 of the adjacent shielding units or the electrical connection between the external electrical elements of the housing 1 and the filter elements. The through-hole capacitor 5 is a special three-terminal capacitor, which is characterized in that it is directly mounted on the metal panel, so that it has a smaller grounding inductance and is almost unaffected by the lead inductance. In addition, its input and output ends are isolated by metal plates, which helps to eliminate high-frequency coupling, so that it has a filtering effect close to that of an ideal capacitor. The through-hole capacitor 5 is used here to connect in series the filter elements inside the housing 1 of different shielding units. The filter elements may be inductors, capacitors, resistors or a combination thereof.

[0035] Preferably, a first conductive rubber ring 6 is provided at the edge of each of the openings 3 to prevent the electromagnetic waves of the filter element inside the housing 1 from being radiated and leaked through the edge of the opening 3. Obviously, when the through-hole capacitor 5 is provided at the opening 3, there will always be a gap between the through-hole capacitor 5 and the opening 3. In this embodiment, in order to solve this problem, a first conductive rubber ring 6 can be provided at the edge of the opening 3 to block the gap, so that no electromagnetic waves will be radiated and leaked from the opening 3. Specifically, the specific shape of the first conductive rubber ring 6 can be set according to the shape of the opening 3, and can be circular, square or rectangular, or other polygonal.

[0036] Preferably, the opening edge of each shell 1 is also provided with a second conductive rubber ring 7, which is used to prevent the electromagnetic waves of the filter element inside the shell 1 from radiating out through the opening edge. As mentioned above, there will be a gap between the shell 1 and the aluminum alloy cover plate 2, and when the filter element is working, there will also be a problem of electromagnetic wave leakage. Therefore, the second conductive rubber ring 7 is provided at the opening edge of the aluminum alloy shell 1 to avoid the possibility of electromagnetic wave leakage. Specifically, the shape of the second conductive rubber ring 7 matches the shape of the opening edge of the shell 1, and the second conductive rubber ring 7 is provided at the opening edge of the shell 1. Figure 2 In the embodiment, the second conductive rubber ring 7 is in a rectangular shape, but it may also be in other shapes.

[0037] Preferably, each housing 1 is further provided with a grounding opening 9 in which a grounding screw 8 is disposed, so that the filter element in each housing 1 is grounded. The purpose of providing the grounding opening 9 is to provide a grounding screw 8 on the housing 1 for grounding.

[0038] In the third aspect, the present application also provides a filter module, including a shielding body of the filter described in any of the above technical solutions; and also including a filter element; the filter element is arranged inside the shielding unit in the shielding body. Specifically, the filter element may include: an inductor 10, an X capacitor 11, a Y capacitor 12, etc., or any combination thereof. Among them, illustratively, the X capacitor 11 can be, for example, a zero-live wire connected. The Y capacitor 12 can be, for example, to the ground, that is, the live wire and the ground, or the neutral wire and the ground. Of course, those skilled in the art can also choose other forms of capacitors as needed.

[0039] In summary, the present application includes at least one of the following beneficial technical effects:

[0040] 1. Greatly shorten the design and development cycle of power supply filters;

[0041] 2. Effectively shield the electromagnetic radiation generated by the power filter;

[0042] 3. It is easy to replace the internal parts of the shielding unit, and after the shielding unit is assembled, the conductive rubber ring forms an electrical connection between the units, which is convenient for disassembly and assembly;

[0043] 4. Shielding units can be freely combined to increase the number of shielding units.

[0044] The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Any feature disclosed in this specification (including the abstract and drawings), unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

Claims

1. A shielding unit of a filter, the shielding unit is used to shield electromagnetic waves generated by the filter located inside, characterized in that: include: A shell and a cover plate; the shell has an opening at the top, and the cover plate covers the top opening of the shell; the shell and / or the cover plate include a first connecting component and a second connecting component; The first connecting component and the second connecting component cooperate with each other to combine two independent shielding units.

2. The shielding unit according to claim 1, characterized in that: The first connecting member and the second connecting member are engaged with each other, the first connecting member is a protruding portion, and the second connecting member is a recessed portion; And after being engaged, it is fixed by a first screw.

3. The shielding unit according to claim 1, characterized in that: The shell is connected to the edge of the cover plate through a second screw.

4. The shielding unit according to claim 1, characterized in that: The first connecting member and the second connecting member are arranged on two opposite sides or two adjacent sides of the bottom of the housing; Alternatively, the first connecting component and the second connecting component are arranged on a side of the housing or a side of the cover plate.

5. A filter shielding body, characterized in that: include: A plurality of shielding units of the filter according to claim 1 connected together; The shielding unit of each filter is connected to the shielding unit of an adjacent filter via a first connecting component and a second connecting component; the surfaces of the shielding units of each filter that are opposite to the shell and are connected in series with the shell of the shielding unit of the adjacent filter or the surface connected with the external electrical component have openings, and the openings are used to connect the filter elements in the adjacent shells or the external electrical components.

6. The shielding body according to claim 5, characterized in that: A through-hole capacitor is arranged inside the opening.

7. The shielding body according to claim 5, characterized in that: A first conductive rubber ring is arranged at the edge of the opening.

8. The shielding body according to claim 5, characterized in that: A second conductive rubber ring is also included between the opening edge of the shell and the cover plate.

9. The shielding body according to claim 5, characterized in that: The housing includes a grounding opening in which a grounding screw is disposed.

10. A filter module, characterized in that: A shielding body comprising the filter as claimed in any one of claims 5 to 9; and a filter element, wherein the filter element is arranged inside a shielding unit in the shielding body.

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