Magnesium alloy electronic device sealing structure

Abstract

The utility model discloses a kind of magnesium alloy electronic equipment sealing structures, belong to electronic equipment technical field, including box body and cover plate, the box body and the cover plate are made of magnesium alloy, the top of the box body is equipped with structure sealing assembly and electromagnetic shielding sealing assembly;The cover plate bottom is equipped with the compression assembly corresponding the structure sealing assembly and the electromagnetic shielding sealing assembly;The electromagnetic shielding sealing assembly is arranged inside the structure sealing assembly;The cover plate with the box body is fixedly connected by fastener.The magnesium alloy electronic equipment sealing structure of the utility model can effectively solve the anticorrosion effect of magnesium alloy electronic equipment through the gap of existing technology by gluing mode, so that electronic equipment loses disassembly, causes maintenance low and other problems.

Description

Technical Field

[0001] This utility model belongs to the field of electronic equipment technology. Specifically, it relates to a sealing structure for magnesium alloy electronic equipment. Background Technology

[0002] In traditional airborne electronic equipment, structural components have always accounted for a large proportion (40%-80%) of the total volume and weight of the equipment. With the increasing demand for miniaturization and lightweight military electronic equipment, the need for weight reduction design of structural components is becoming more and more urgent. Magnesium alloy is a new type of lightweight and high-quality alloy material. Replacing aluminum alloy, which is commonly used in traditional electronic equipment, with magnesium alloy can reduce the weight of the equipment by up to 30%.

[0003] Unlike other non-electrical equipment, electronic devices typically require electromagnetic shielding. The contact surfaces between two overlapping structural components have significant gaps from an electromagnetic wave perspective, necessitating the use of conductive rubber strips to seal against electromagnetic waves and achieve electromagnetic shielding. However, magnesium alloys have extremely poor corrosion resistance. Current surface treatment technologies only guarantee high corrosion resistance in non-conductive areas of magnesium alloy parts, but poor corrosion resistance in conductive areas and dissimilar metal overlap areas. The electromagnetic shielding requirements of electronic equipment dictate the presence of numerous conductive overlap areas, making galvanic corrosion inevitable in the presence of corrosive solutions. Magnesium alloy equipment often uses micro-arc oxidation to improve corrosion resistance; however, micro-arc oxidized surfaces are non-conductive. Therefore, even with conductive rubber strips installed in the rubber strip mounting groove, electrical continuity between the two overlapping structural components cannot be achieved, leading to electromagnetic shielding failure. While conductive oxidation at the rubber strip mounting groove can achieve electromagnetic shielding, the metal particles within the conductive rubber strip interlock with the magnesium alloy, creating a dissimilar metal interface. The mounting groove is located close to the interface seams, which readily absorb corrosive solutions. This makes the surface of the conductively oxidized interface area within the rubber strip mounting groove highly susceptible to corrosion, making this a major area of ​​galvanic corrosion for magnesium alloy electronic devices. Currently, most magnesium alloy electronic devices use gap-sealing adhesives to prevent the entry of corrosive solutions, effectively achieving corrosion resistance. However, this approach compromises the device's disassembly and maintainability, resulting in extremely low maintainability. Therefore, effectively balancing electromagnetic shielding, corrosion resistance, and maintainability in the design of electronic devices has become one of the main bottlenecks restricting the application and promotion of magnesium alloys. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides a sealing structure for magnesium alloy electronic devices, aiming to solve the problems of corrosion resistance achieved by applying adhesive to gaps in existing magnesium alloy electronic devices, which results in loss of disassembly and low maintainability. To achieve the above objective, this utility model provides the following technical solution: A magnesium alloy electronic device sealing structure includes a housing and a cover plate, both of which are made of magnesium alloy. The top of the housing is provided with a structural sealing component and an electromagnetic shielding sealing component. The bottom of the cover plate is provided with a clamping component corresponding to the structural sealing component and the electromagnetic shielding sealing component. The electromagnetic shielding sealing component is disposed inside the structural sealing component. The cover plate and the housing are fixedly connected by fasteners.

[0005] Furthermore, the structural sealing assembly includes a non-conductive rubber strip mounting groove and a non-conductive rubber strip; the non-conductive rubber strip mounting groove is arranged in a closed loop at the top edge of the box body; the pressing assembly includes a non-conductive rubber strip pressing groove; when the cover plate is connected to the box body, the non-conductive rubber strip pressing groove and the non-conductive rubber strip mounting groove are tightly fitted together, pressing the non-conductive rubber strip installed in the non-conductive rubber strip mounting groove.

[0006] Furthermore, the electromagnetic shielding sealing assembly includes a conductive rubber strip mounting groove and a conductive rubber strip; the conductive rubber strip mounting groove is arranged in a closed loop on the top of the box body and is located inside the non-conductive rubber strip mounting groove; the pressing assembly also includes a conductive rubber strip pressing groove; when the cover plate is connected to the box body, the conductive rubber strip pressing groove and the conductive rubber strip mounting groove are tightly fitted together, pressing the conductive rubber strip installed in the conductive rubber strip mounting groove.

[0007] Furthermore, the top of the box body is provided with a rubber strip mounting groove spacer, which is disposed between the non-conductive rubber strip mounting groove and the conductive rubber strip mounting groove; the bottom of the cover plate is provided with a rubber strip pressing groove spacer, which is disposed between the non-conductive rubber strip pressing groove and the conductive rubber strip pressing groove; when the cover plate is connected to the box body, the rubber strip mounting groove spacer and the rubber strip pressing groove spacer fit tightly together to separate the non-conductive rubber strip and the conductive rubber strip.

[0008] Furthermore, the depth of the non-conductive rubber strip groove after it mates with the non-conductive rubber strip mounting groove is slightly less than the diameter of the non-conductive rubber strip; the depth of the conductive rubber strip groove after it mates with the conductive rubber strip mounting groove is slightly less than the diameter of the conductive rubber strip.

[0009] Furthermore, the fastener includes a plurality of fastening screws; the top of the box body is provided with a plurality of threaded holes; the cover plate is provided with a plurality of through holes corresponding to the positions of the threaded holes on the box body, and the fastening screws pass through the through holes and engage with the threaded holes to fasten the cover plate to the box body.

[0010] Furthermore, the surfaces of the non-conductive rubber strip mounting groove, the non-conductive rubber strip pressing groove, the rubber strip pressing groove spacer, and the rubber strip mounting groove spacer are all subjected to micro-arc oxidation treatment.

[0011] Furthermore, the surfaces of both the conductive rubber strip mounting groove and the conductive rubber strip pressing groove are treated with colored conductive oxidation.

[0012] Furthermore, the non-conductive rubber strip is a conventional silicone rubber strip.

[0013] Furthermore, the conductive rubber strip is an aluminum-plated silver silicone rubber strip with conductivity.

[0014] The beneficial effects of this utility model are: By designing conductive rubber strip mounting grooves and non-conductive rubber strip mounting grooves, the non-conductive rubber strip mounting grooves are installed using micro-arc oxidation, while the conductive rubber strip mounting grooves are installed using conductive oxidation. The non-conductive rubber strips block corrosive solutions, while the conductive rubber strips achieve electromagnetic shielding, thus achieving the effect of good equipment disassembly, corrosion resistance, and electromagnetic shielding. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the exploded structure of this utility model; Figure 2 This is a top view of the box body of this utility model; Figure 3 This is a partial schematic diagram of the non-conductive rubber strip and the conductive rubber strip of this utility model; Figure 4 This is a cross-sectional view of the non-conductive rubber strip and the conductive rubber strip of this utility model. The attached diagram is labeled as follows: 1. Box body; 2. Non-conductive rubber strip; 3. Conductive rubber strip; 4. Cover plate; 5. Fastening screw; 101. Non-conductive rubber strip mounting groove; 102. Conductive rubber strip mounting groove; 103. Rubber strip mounting groove spacer; 201. Non-conductive rubber strip pressing groove; 202. Conductive rubber strip pressing groove; 203. Rubber strip pressing groove spacer. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to the following embodiments.

[0017] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0018] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0019] In the description of this utility model, "multiple" means two or more.

[0020] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0021] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0022] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," and "some examples" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0023] Example See attached Figures 1-4This embodiment provides a magnesium alloy electronic device sealing structure. The magnesium alloy electronic device sealing structure of this embodiment uses magnesium alloy as the core substrate and includes a housing 1, a cover plate 4, a structural sealing component, an electromagnetic shielding sealing component, a clamping component, and fasteners. The housing 1 serves as the base of the electronic device, used to carry the electronic module. The cover plate 4 is adapted to and encapsulates the housing 1, forming a closed device cavity. Both the structural sealing component and the electromagnetic shielding sealing component are located on the top of the housing 1, with the electromagnetic shielding sealing component located inside the structural sealing component, achieving a dual-function layout of "internal electromagnetic shielding and external sealing to prevent the intrusion of corrosive solutions." The clamping component is correspondingly located at the bottom of the cover plate 4, used to cooperate with the sealing component of the housing 1 to ensure that the rubber strip is compressed and deformed to perform its function. Fasteners are fastening screws 5, enabling a detachable and secure connection between the housing 1 and the cover plate 4.

[0024] In this embodiment, two continuous recessed mounting grooves are machined on the top edge area of ​​the box body 1, namely a non-conductive rubber strip mounting groove 101 and a conductive rubber strip mounting groove 102. The two mounting grooves are distributed in a closed loop, which can fully cover the overlapping surface of the box body 1 and the cover plate 4, avoiding blind spots in sealing or shielding. Between the non-conductive rubber strip mounting groove 101 and the conductive rubber strip mounting groove 102, a rubber strip mounting groove spacer 103 is integrally formed. The height of the rubber strip mounting groove spacer 103 is flush with the top plane of the box body 1. It can physically separate the non-conductive rubber strip 2 and the conductive rubber strip 3, preventing them from sticking together or interfering with each other when compressed and deformed, and also enhance the structural strength of the top of the box body 1, preventing the mounting groove from deforming due to stress.

[0025] In this embodiment, considering the easy corrosion of magnesium alloy substrate, the inner wall of the non-conductive rubber strip mounting groove 101 and the surface of the rubber strip mounting groove spacer 103 on the box body 1 are treated with micro-arc oxidation. This treatment can form a dense oxide ceramic layer on the magnesium alloy surface, which can not only isolate external moisture and dust from contact with the substrate and achieve an auxiliary anti-corrosion effect for structural sealing, but also improve surface hardness and avoid scratch damage to the groove wall during rubber strip installation. The inner wall of the conductive rubber strip mounting groove 102 is treated with colored conductive oxidation. This treatment can maintain surface conductivity, ensure the electrical connection stability between the conductive rubber strip 3 and the box body 1, and provide a reliable conductive path for electromagnetic shielding function.

[0026] In this embodiment, the non-conductive rubber strip 2 in the structural sealing assembly is made of conventional silicone rubber. Silicone rubber has excellent elasticity, aging resistance, and sealing performance. Its cross-sectional shape matches the cross-sectional shape of the non-conductive rubber strip mounting groove 101. During installation, it is directly embedded into the non-conductive rubber strip mounting groove 101 without additional bonding, facilitating future maintenance and replacement. The conductive rubber strip 3 in the electromagnetic shielding sealing assembly is made of aluminum-plated silver silicone rubber, which has good conductivity. The cross-sectional dimensions of the conductive rubber strip 3 match the conductive rubber strip mounting groove 102, and the installation method is the same as that of the non-conductive rubber strip 2. After being embedded in the conductive rubber strip mounting groove 102, its top is slightly higher than the top plane of the box 1, reserving space for subsequent compression deformation.

[0027] In this embodiment, at the position corresponding to the mounting groove of the box body 1, the bottom of the cover plate 4 is machined with a non-conductive rubber strip groove 201, a conductive rubber strip groove 202, and a rubber strip groove spacer 203, which together constitute a pressing assembly. The position and shape of the non-conductive rubber strip groove 201 completely correspond to the non-conductive rubber strip mounting groove 101, the conductive rubber strip groove 202 corresponds to the conductive rubber strip mounting groove 102, and the rubber strip groove spacer 203 is aligned with the rubber strip mounting groove spacer 103, ensuring that the pressing assembly can accurately cooperate with the sealing assembly when the cover plate 4 is closed.

[0028] In this embodiment, the inner wall of the non-conductive rubber strip groove 201 and the surface of the rubber strip groove spacer 203 are treated with micro-arc oxidation, and the inner wall of the conductive rubber strip groove 202 is treated with colored conductive oxidation. When connected with the box body 1, both the corrosion resistance of the structural sealing component and the conductivity of the electromagnetic shielding sealing component are guaranteed.

[0029] In this embodiment, the sum of the depths of the non-conductive rubber strip mounting groove 101 and the non-conductive rubber strip pressing groove 201 is slightly less than the diameter of the non-conductive rubber strip 2; similarly, the sum of the depths of the conductive rubber strip mounting groove 102 and the conductive rubber strip pressing groove 202 is also slightly less than the diameter of the conductive rubber strip 3. This structure ensures that after the cover plate 4 is fastened to the box body 1, the rubber strip is forcibly compressed and deformed, making the rubber strip tightly fit the inner walls of the mounting groove and the pressing groove. This eliminates gaps and achieves a reliable structural seal, while also allowing the conductive rubber strip 3 to fully contact the box body 1 and the cover plate 4, forming a continuous conductive path and ensuring electromagnetic shielding effectiveness.

[0030] In this embodiment, the fasteners consist of several fastening screws 5. Several threaded holes (not shown in the figure) are evenly distributed along the edge of the top of the housing 1. Through holes (not shown in the figure) are machined on the cover plate 4 at the positions corresponding to the threaded holes. During assembly, the fastening screws 5 are passed through the through holes of the cover plate 4 and threaded into the threaded holes of the housing 1. By evenly tightening all the fastening screws 5, the cover plate 4 is pressed down smoothly until it is flush with the top surface of the housing 1. The non-conductive rubber strip 2, due to compression deformation, tightly fills the space between the non-conductive rubber strip mounting groove 101 and the pressure groove 201, forming a continuous sealing barrier. This effectively prevents external moisture, dust, oil, corrosive solutions, and other impurities from entering the equipment, protecting the electronic modules from environmental interference. After compression, the conductive rubber strip 3 simultaneously comes into close contact with the conductive rubber strip mounting groove 102 of the housing 1 and the conductive rubber strip pressure groove 202 of the cover plate 4, forming a conductive loop surrounding the inside of the equipment, achieving electromagnetic shielding requirements.

[0031] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model. Technologies, shapes, and structural parts not described in detail in this utility model are all known technologies.

Claims

1. A magnesium alloy sealing structure for electronic devices, comprising a housing (1) and a cover plate (4), wherein both the housing (1) and the cover plate (4) are made of magnesium alloy, characterized in that: The top of the box (1) is provided with a structural sealing component and an electromagnetic shielding sealing component; the bottom of the cover plate (4) is provided with a pressing component corresponding to the structural sealing component and the electromagnetic shielding sealing component; the electromagnetic shielding sealing component is disposed inside the structural sealing component; the cover plate (4) and the box (1) are fixedly connected by fasteners.

2. The magnesium alloy electronic device sealing structure according to claim 1, characterized by: The structural sealing assembly includes a non-conductive rubber strip mounting groove (101) and a non-conductive rubber strip (2); the non-conductive rubber strip mounting groove (101) is arranged in a closed loop at the top edge of the box body (1); the pressing assembly includes a non-conductive rubber strip pressing groove (201); when the cover plate (4) is connected to the box body (1), the non-conductive rubber strip pressing groove (201) and the non-conductive rubber strip mounting groove (101) are tightly fitted together, pressing the non-conductive rubber strip (2) installed in the non-conductive rubber strip mounting groove (101).

3. The magnesium alloy electronic device sealing structure according to claim 2, characterized by: The electromagnetic shielding sealing assembly includes a conductive rubber strip mounting groove (102) and a conductive rubber strip (3); the conductive rubber strip mounting groove (102) is arranged in a closed loop on the top of the box body (1) and is located inside the non-conductive rubber strip mounting groove (101); the pressing assembly also includes a conductive rubber strip pressing groove (202); when the cover plate (4) is connected to the box body (1), the conductive rubber strip pressing groove (202) is tightly fitted with the conductive rubber strip mounting groove (102) to press the conductive rubber strip (3) installed in the conductive rubber strip mounting groove (102).

4. The magnesium alloy electronic device sealing structure according to claim 3, characterized in that: The top of the box body (1) is provided with a rubber strip mounting groove partition (103), which is located between the non-conductive rubber strip mounting groove (101) and the conductive rubber strip mounting groove (102); the bottom of the cover plate (4) is provided with a rubber strip pressing groove partition (203), which is located between the non-conductive rubber strip pressing groove (201) and the conductive rubber strip pressing groove (202); when the cover plate (4) is connected to the box body (1), the rubber strip mounting groove partition (103) and the rubber strip pressing groove partition (203) fit together tightly to separate the non-conductive rubber strip (2) and the conductive rubber strip (3).

5. The magnesium alloy electronic device sealing structure according to claim 3, characterized in that: The depth of the non-conductive rubber strip groove (201) after it is fitted with the non-conductive rubber strip mounting groove (101) is slightly less than the diameter of the non-conductive rubber strip (2); the depth of the conductive rubber strip groove (202) after it is fitted with the conductive rubber strip mounting groove (102) is slightly less than the diameter of the conductive rubber strip (3).

6. The magnesium alloy electronic device sealing structure according to claim 1, characterized in that: The fasteners include a number of fastening screws (5); the top of the box body (1) is provided with a number of threaded holes; the cover plate (4) is provided with a number of through holes corresponding to the positions of the threaded holes on the box body (1), and the cover plate (4) and the box body (1) are fastened by the fastening screws (5) passing through the through holes and threadedly engaging with the threaded holes.

7. The magnesium alloy electronic device sealing structure according to claim 4, characterized by: The surfaces of the non-conductive rubber strip mounting groove (101), the non-conductive rubber strip pressing groove (201), the rubber strip pressing groove spacer (203), and the rubber strip mounting groove spacer (103) are all treated with micro-arc oxidation.

8. The magnesium alloy electronic device sealing structure according to claim 3, characterized by: The surfaces of the conductive rubber strip mounting groove (102) and the conductive rubber strip pressing groove (202) are both treated with colored conductive oxidation.

9. The magnesium alloy electronic device sealing structure according to claim 2, characterized by: The non-conductive rubber strip (2) is a conventional silicone rubber strip.

10. A magnesium alloy electronic device sealing structure according to claim 3, characterized in that: The conductive rubber strip (3) is an aluminum-plated silver silicone rubber strip with conductivity.

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