Power adapter

Abstract

The utility model provides a power adapter, and aims to solve the technical problem that electromagnetic waves in the adapter cannot be effectively shielded in the prior art. The power adapter comprises a cover plate and a box body, the cover plate and the box body are sealed through a conductive sealing ring, an AC connector, a filter, a filtering module, a power module and a DC connector are sequentially arranged in the box body, the filtering module comprises an isolation plate and a feed-through capacitor installed on the isolation plate, one end of the isolation plate is connected with the cover plate, and the other end of the isolation plate is connected with the power module. The other end of the connecting rod is connected with the bottom of the box body, and the box body is divided into different closed spaces after connection. According to the utility model, the structural design is simple, the isolation plate and the feed-through capacitor are combined, excellent electromagnetic shielding performance is realized, and the feed-through capacitor has great application prospect.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic shielding, in particular to a power adapter. Background Art

[0002] The electromagnetic compatibility design of military electronic equipment is an important direction in the field of military science and technology. By analyzing and evaluating the electromagnetic environment, selecting appropriate design principles, using shielding technology, ground wire design and grounding technology, filter selection and design, and signal conditioning and processing technology, the anti-interference ability of military electronic equipment can be improved to ensure its normal operation without being interfered by other electromagnetic radiation sources.

[0003] The adapter in the prior art is an ordinary power adapter, which has a plastic shell, poor anti-interference and large radiation that will affect the normal operation of other equipment. Most of the existing adapters, especially those used in military electronic equipment, use homemade adapters. In the design process, due to the lack of effective separation between the front and rear stages, the electromagnetic waves generated by the rear stage will be coupled to the front stage through space radiation, resulting in a decrease in filtering performance.

[0004] Therefore, it is urgent to study an adapter with excellent filtering performance, especially a military adapter is of great significance. Utility Model Content

[0005] The purpose of the utility model is to solve the problem that the electromagnetic waves generated by the latter stage are coupled to the former stage through space radiation, thereby reducing the filtering performance, because the self-designed adapter in the prior art does not effectively separate the front and rear stages. The self-made adapter of the utility model effectively isolates the internal space of the adapter through the provision of an isolation plate and a through-core capacitor, thereby effectively solving the problem of electromagnetic wave space radiation coupling.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A power adapter comprises a cover plate and a box body, wherein the cover plate and the box body are sealed by a conductive sealing ring, and an AC connector, a filter, a filter module, a power module and a DC connector are sequentially arranged in the box body, wherein the filter module comprises an isolation plate and a through-core capacitor mounted thereon, one end of the isolation plate is connected to the cover plate, and the other end is connected to the bottom of the box body, and after the connection, the box body is divided into different enclosed spaces.

[0008] The utility model realizes effective separation of each functional module by using filters, filter modules (through-core capacitors and isolation plates), and conductive sealing rings to ensure that they will not be coupled to the front and rear stages through space. First, the city power enters the adapter through the AC connector, and is filtered by the filter for the first step. After coming out, it is filtered for the second time through the through-core capacitor and the isolation plate and flows to the power module. At this time, due to the characteristics of the through-core capacitor, the current can only flow to the next stage through the through-core capacitor. The electromagnetic waves generated in the power module will not be coupled to the previous stage through space. After the current flows into the power module, it is converted from AC to DC output. Since only the through-core capacitor is connected between the front and rear stages, the rest of the places are sealed, which can effectively isolate the influence of the front and rear stages. The conductive sealing ring is located between the buckling part of the box body and the cover plate, which can effectively isolate the inside and the outside.

[0009] The utility model adopts a through-core capacitor as a bypass capacitor in the filter module, which can achieve a good high-frequency filtering effect. The through-core capacitor has a very small parasitic inductance, and the bypass impedance is very small. In addition, due to the isolation installation method, the high-frequency coupling between the input and output ends is eliminated. The commonly used tubular through-core capacitor has coaxiality, and even at a frequency of 10GHz, it will not produce obvious self-resonance. The medium of the through-core capacitor is a ceramic medium, and the capacity of the ceramic capacitor will change with the ambient temperature. This capacity change will affect the filter cutoff rate of the filter. Therefore, it is particularly important to select an appropriate ceramic medium for the through-core capacitor. Since the shell of the through-core capacitor is the other electrode of the capacitor and is connected to the "ground", the high-frequency electromagnetic interference signal is short-circuited to the "ground" when passing through the center conductor, and the electromagnetic interference is eliminated, thereby greatly improving the electromagnetic shielding performance.

[0010] As the preferred technical solution:

[0011] In a power adapter as described above, there are two groups of filter modules, one group is arranged between the filter and the power module, and the other group is arranged between the power module and the DC connector. The utility model sets two groups of filter modules, the first group of filter modules is arranged behind the filter and in front of the power module, the purpose of which is to perform the first shielding of the electromagnetic waves fully filtered out by the filter, to prevent the electromagnetic waves generated by the current after flowing into the power module from coupling to the filter space; the second group of filter modules is arranged behind the power module and in front of the DC connector, because the power module is a strong interference source, which will generate a lot of interference when working, and the second group of filter modules will play a second shielding role, thus ensuring the complete shielding of electromagnetic waves, so that the electromagnetic shielding performance has been greatly improved.

[0012] In the power adapter as described above, the isolation plate is in a "Z" shape, and its upper end surface contacts the cover plate to form a conductive connection, and its lower end surface contacts the bottom of the box body to form a conductive connection.

[0013] In the power adapter as described above, the through-core capacitor is arranged on the main body of the isolation board.

[0014] In the power adapter as described above, there is at least one through-core capacitor.

[0015] In the power adapter as described above, the through-core capacitor and the isolation plate are sealed and connected to each other, so as to ensure that a completely enclosed space can be formed.

[0016] In the power adapter as described above, the isolation plate is made of metal, preferably aluminum alloy anode material.

[0017] In the power adapter as described above, the cover plate and the box body are made of 6 series aluminum alloy, which has excellent mechanical properties, thermal conductivity, and magnetic shielding properties.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The power adapter of the utility model, especially the power adapter for military electronic equipment, can realize the electromagnetic compatibility design of the power adapter, effectively isolate the front and back stages, enhance the filtering capability, and effectively ensure the anti-interference capability of the power supply equipment and the ability to radiate electromagnetic waves externally. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a structural front view of the power adapter of the utility model;

[0022] Figure 2 This is a top view of the power adapter of the utility model after the cover plate and the box body are covered;

[0023] Figure 3 for Figure 2 Side section along the AA direction;

[0024] Reference numerals:

[0025] 1-cover; 2-box body; 3-conductive sealing ring; 4-AC connector; 5-filter; 6-core capacitor; 7-isolation board; 8-power module; 9-DC connector. DETAILED DESCRIPTION

[0026] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the present invention are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0028] 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 the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0032] The embodiments of the present invention / utility model are described in detail below with reference to the accompanying drawings.

[0033] The utility model embodiment provides a power adapter, such as Figures 1 to 3 As shown, it includes a cover plate 1 and a box body 2, the cover plate 1 and the box body 2 are sealed by a conductive sealing ring 3, and the box body is sequentially provided with an AC connector 4, a filter 5, a filter module, a power module 8 and a DC connector 9, wherein the filter module includes an isolation plate 7 and a through-core capacitor 6 installed thereon, the isolation plate is in a "Z" shape, its upper end surface contacts the cover plate 1 to form a conductive connection, and its lower end surface contacts the bottom of the box body 2 to form a conductive connection, and the through-core capacitor 6 is arranged on the main body at the middle position of the isolation plate 7. There is at least one through-core capacitor 6 installed on the isolation plate 7, preferably two, and the through-core capacitor 6 is sealed and connected to the isolation plate 7.

[0034] After the isolation plate 6 is connected to the cover plate 1 and the box body 2, the box body 2 is divided into different closed spaces, that is, a closed space is formed between the filter and the isolation plate, and a closed space is formed between the isolation plate and the power module.

[0035] As a more preferred embodiment, the isolation plate is made of metal.

[0036] As a more preferred embodiment, the cover plate and the box body are made of 6 series aluminum alloy.

[0037] As a more preferred embodiment, there are two groups of filtering modules, such as Figures 1 to 3 As shown, one group is arranged between the filter 5 and the power module 8, and the other group is arranged between the power module 8 and the DC connector 9. In this way, three closed spaces are formed, namely, the first closed space is formed between the filter 5 and the isolation board of the first group of filter modules, the second closed space is formed between the isolation board of the first group of filter modules, the power module 8 and the isolation board of the second group of filter modules, and the third closed space is formed between the isolation board of the second group of filter modules and the DC connector 9, wherein the first closed space formed is used to shield the electromagnetic waves generated by the filter to prevent the power module of the next stage from generating spatial radiation coupling to the filter of the previous stage; the second closed space formed is used to shield the electromagnetic waves generated by the power module, and further filter out part of the electromagnetic waves generated from the power module; the third closed space formed again shields the remaining electromagnetic waves, so that all possible electromagnetic waves can be further filtered, thus realizing the function of efficient filtering.

[0038] The power adapter of the utility model has a simple structural design, combines the isolation board and the battery core capacitor, effectively isolates the space of the adapter, achieves excellent electromagnetic shielding performance, solves the problem that the prior art cannot effectively shield electromagnetic waves, and has great application prospects.

Claims

1. A power adapter, comprising a cover plate and a box body, wherein the cover plate and the box body are sealed by a conductive sealing ring, characterized in that: An AC connector, a filter, a filter module, a power module and a DC connector are sequentially arranged in the box body, wherein the filter module includes an isolation plate and a through-core capacitor mounted thereon, one end of the isolation plate is connected to the cover plate, and the other end is connected to the bottom of the box body, and after connection, the box body is divided into different enclosed spaces.

2. A power adapter according to claim 1, characterized in that: The filter modules have two groups, one group is arranged between the filter and the power module, and the other group is arranged between the power module and the DC connector.

3. A power adapter according to claim 1, characterized in that: The isolation plate is in a "Z" shape, with its upper end surface contacting the cover plate to form a conductive connection, and its lower end surface contacting the bottom of the box body to form a conductive connection.

4. A power adapter according to claim 3, characterized in that: The through-core capacitor is arranged on the main body of the isolation plate.

5. A power adapter according to claim 1, characterized in that: There is at least one through-core capacitor.

6. A power adapter according to claim 1, characterized in that: The through-core capacitor is sealed and connected to the isolation plate.

7. A power adapter according to claim 1, characterized in that: The isolation plate is made of metal.

8. The power adapter according to claim 1, characterized in that: The cover plate and the box body are made of 6 series aluminum alloy.

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