Main control board shielding structure of low-leakage handheld intelligent terminal

Abstract

The utility model discloses a main control board shielding structure of a low-leakage hand-held intelligent terminal, which relates to the technical field of information processing equipment, and comprises a middle frame, a main control board, a functional device, a rear cover and a shielding assembly, the inner side of the middle frame is provided with a mounting groove for mounting the main control board, the rear cover is buckled on one side of the middle frame, and the shielding assembly is arranged in the mounting groove. A mounting cavity is formed between the rear cover and the middle frame, the main control board is located in the mounting cavity, the functional device is mounted on the main control board, the shielding assembly comprises a shielding cover and a shielding element, the shielding cover is mounted on the side, close to the rear cover, of the main control board, and the shielding element is mounted on the side, close to the rear cover, of the main control board. A shielding chamber is formed between the shielding cover and the main control board, the functional device is installed in the shielding chamber, and the shielding element is installed on the periphery of the main control board and the functional device. According to the utility model, information leakage at the main control board can be effectively prevented, and the security of confidential information is ensured.

Description

Technical Field

[0001] This utility model relates to the field of information processing equipment technology, and in particular to a shielding structure for the main control board of a low-leakage handheld smart terminal. Background Technology

[0002] With the acceleration of informatization, information processing equipment is being used more and more widely. When they are working, they not only generate electromagnetic radiation, but also electromagnetic information leakage, which leads to the theft and restoration of classified information and causes leakage incidents.

[0003] However, ordinary handheld terminals have low levels of electromagnetic protection, resulting in significant electromagnetic wave leakage during operation. The radiation frequencies range from low to high, and the wave sources include magnetic field waves, electric field waves, and electromagnetic waves. Studies have shown that electromagnetic waves radiated from ordinary handheld terminals without electromagnetic shielding can be intercepted and recovered from a distance of one kilometer. With highly sensitive equipment, the maximum interception distance will be even greater. In such cases, if the information processed by the device is critical, it can easily lead to information leakage, compromising information security.

[0004] As the central hub of the electronic device, the main control board inside the handheld terminal is responsible for connecting various hardware devices. The main control board receives signals and data from various hardware devices, processes them, and then transmits them to the corresponding devices to realize data flow and processing, and ensure coordinated communication between devices. It can be seen that the main control board plays a vital role in electronic devices and is the core component for realizing intelligent and automated control of devices. Therefore, the hardening of the main control board and the protection against electromagnetic waves are problems that urgently need to be solved in this field. Utility Model Content

[0005] The purpose of this invention is to provide a shielding structure for the main control board of a low-leakage handheld smart terminal, so as to solve the problems existing in the prior art, effectively prevent information leakage at the main control board, and ensure the security of classified information.

[0006] To achieve the above objectives, this utility model provides the following solution:

[0007] This utility model provides a shielding structure for the main control board of a low-leakage handheld smart terminal, including a middle frame, a main control board, functional devices, a back cover, and a shielding assembly. The inner side of the middle frame is provided with a mounting groove for mounting the main control board. The back cover is fastened to one side of the middle frame, and a mounting cavity is formed between the back cover and the middle frame. The main control board is located in the mounting cavity, and the functional devices are mounted on the main control board. The shielding assembly includes a shielding cover and a shielding element. The shielding cover is mounted on the side of the main control board near the back cover, and a shielding cavity is formed between the shielding cover and the main control board. The functional devices are mounted in the shielding cavity, and the shielding element is mounted on the outer periphery of the main control board and at the functional devices.

[0008] Preferably, the shielding element includes a copper plating layer that covers the outer ring of the main control board, with one end of the copper plating layer extending to the upper surface of the main control board and in close contact with the middle frame, and the other end of the copper plating layer extending to the lower surface of the main control board and in close contact with the shielding cover.

[0009] Preferably, the shield is made of a metal material.

[0010] Preferably, the functional devices include a rear camera, a rear macro camera, an infrared thermal imaging camera, and a flash, all mounted on the main control board near the rear cover. One end of each of the rear camera, the rear macro camera, the infrared thermal imaging camera, and the flash extends out of the shielding cover, and the shielding element is provided at each of the rear camera, the rear macro camera, the infrared thermal imaging camera, and the flash.

[0011] Preferably, the shielding element further includes a shielding window. A rear window is provided on the rear cover at the position corresponding to the rear camera and the rear macro camera. The shielding window is installed on the inner side of the rear cover and can cover the two rear windows. The outer edge of the shielding window is bonded and fixed to the inner side of the rear cover.

[0012] Preferably, the back cover has a light outlet corresponding to the position of the flash lamp, and the flash lamp is provided with a light shield, a fixing bracket and a diffuser. The light shield is installed on the outer periphery of the flash lamp on the side close to the back cover, the fixing bracket is installed at the light outlet, and the middle part of the fixing bracket is open for light transmission. The diffuser is installed on the fixing bracket, and the fixing bracket is located between the light shield and the diffuser.

[0013] Preferably, the shielding element further includes a metal conductive mesh film, which is mounted on the fixing frame on the side away from the light shield, and one side of the metal conductive mesh film contacts the diffuser.

[0014] Preferably, the shielding element further includes a conductive foam layer, which is disposed around the outer periphery of the image acquisition end of the infrared thermal imaging camera. One end of the conductive foam layer is in close contact with the base of the infrared thermal imaging camera, the other end of the conductive foam layer is in close contact with the inner wall of the rear cover, and the outer periphery of the conductive foam layer is in close contact with the shielding cover.

[0015] Preferably, a germanium glass layer is installed on the back cover at the position corresponding to the infrared thermal imaging camera, and the outer periphery of the germanium glass layer is bonded to the back cover with conductive adhesive.

[0016] Preferably, the upper end face of the middle frame is provided with a limiting groove, which is located near the outer ring of the middle frame; the lower end face of the back cover is provided with a limiting protrusion, which is located near the outer ring of the back cover; a conductive rubber strip is embedded in the limiting groove; the middle frame and the back cover are connected by screws; and the limiting protrusion can be embedded in the limiting groove and press the conductive rubber strip.

[0017] The present invention achieves the following technical advantages over the prior art:

[0018] This utility model provides a low-leakage handheld smart terminal main control board shielding structure, including a middle frame, a main control board, functional components, a back cover, and a shielding assembly. The inner side of the middle frame has a mounting groove for installing the main control board. The back cover is fastened to one side of the middle frame, forming a mounting cavity between the back cover and the middle frame to provide mounting space for the main control board and functional components. The main control board is located within the mounting cavity, and the functional components are mounted on the main control board. The shielding assembly includes a shielding cover and shielding elements. The shielding cover is installed on the side of the main control board near the back cover, forming a shielding cavity between the shielding cover and the main control board. The functional components are mounted within the shielding cavity, thus providing electromagnetic shielding for the main control board and its connected functional components. The shielding elements are installed on the outer periphery of the main control board and at the functional components to improve the shielding effect. Through the above design, this utility model uses electromagnetic protection to prevent electromagnetic information leakage from the main control board during use, ensuring the device meets the requirements of GJB4216-2001 "Electromagnetic Leakage Emission Requirements and Measurement for Cryptographic Machines," effectively preventing information leakage and ensuring the security of classified information. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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.

[0020] Figure 1 This is a schematic diagram showing the location of the shielding structure on the main control board of the low-emission handheld smart terminal of this utility model.

[0021] Figure 2 This is an exploded view of the shielding structure of the main control board of the low-emission handheld smart terminal of this utility model.

[0022] Figure 3 This is a schematic diagram showing the installation position of the shielding cover in this utility model;

[0023] Figure 4 This is a schematic diagram showing the installation position of the cable pressure plate in this utility model;

[0024] Figure 5 This is a schematic diagram of the shielding element at the functional device in this utility model;

[0025] In the diagram: 100 - Shielding structure of the main control board of the low-leakage handheld smart terminal; 1 - Mid-frame; 2 - Main control board; 3 - Shielding cover; 4 - Light shield; 5 - Conductive mesh; 6 - Fixing bracket; 7 - Shielding window; 8 - Soft spot; 9 - Cable clamp; 10 - Germanium glass layer; 11 - Conductive foam layer; 12 - Back cover; 13 - Conductive adhesive strip; 14 - Copper plating layer; 15 - Rear camera; 16 - Flash; 17 - Connecting cable; 18 - Rear macro camera; 19 - Infrared thermal imaging camera. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] The purpose of this invention is to provide a shielding structure for the main control board of a low-leakage handheld smart terminal, so as to solve the problems existing in the prior art, effectively prevent information leakage at the main control board, and ensure the security of classified information.

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figures 1-5As shown, this embodiment provides a shielding structure 100 for the main control board of a low-leakage handheld smart terminal, including a middle frame 1, a main control board 2, functional devices, a back cover 12, and a shielding assembly. The inner side of the middle frame 1 is provided with a mounting groove for mounting the main control board 2. The back cover 12 is fastened to one side of the middle frame 1, and a mounting cavity is formed between the back cover 12 and the middle frame 1 to provide mounting space for the main control board 2 and the functional devices. The main control board 2 is located in the mounting cavity, and the functional devices are mounted on the main control board 2. The shielding assembly includes a shielding cover 3 and shielding elements. The shielding cover 3 is mounted on the side of the main control board 2 near the back cover 12, and a shielding cavity is formed between the shielding cover 3 and the main control board 2. The functional devices are mounted in the shielding cavity, thereby providing electromagnetic shielding for the main control board 2 and its connected functional devices. The shielding elements are mounted on the outer periphery of the main control board 2 and at the functional devices to improve the shielding effect. This embodiment, through the above design, employs electromagnetic protection measures to prevent electromagnetic information leakage from the two main control boards during use, ensuring that the equipment meets the requirements of GJB4216-2001 "Requirements and Measurement of Electromagnetic Leakage Emissions of Cryptographic Machines", effectively preventing information leakage and ensuring the security of classified information.

[0030] Specifically, the shielding element includes a copper plating layer 14, which covers the outer ring of the main control board 2. One end of the copper plating layer 14 extends to the upper surface of the main control board 2 and is in close contact with the middle frame 1. The other end of the copper plating layer 14 extends to the lower surface of the main control board 2 and is in close contact with the shielding cover 3. This ensures that the shielding cover 3 effectively overlaps with the copper plating layer 14 on the lower surface of the main control board 2, and also effectively overlaps with the copper plating layer 14 around the interface socket. This comprehensively blocks the electromagnetic waves generated by the main control board 2, thus providing overall shielding for the main control board 2. This not only meets the requirements for shielding effectiveness but also the functional requirements. As a preferred embodiment, the width of the copper plating layer 14 at both the upper and lower ends of the main control board 2 is 3mm, and a copper plating layer 14 with a width of 3mm is also designed around the interface socket.

[0031] The shielding cover 3 is made of metal, preferably a low-resistance metal, which can effectively cope with the interference of high-frequency electromagnetic fields generated by the main control board 2. The shielding cover 3, made of metal, absorbs and reflects the electromagnetic field to achieve the purpose of shielding. In addition to the electromagnetic induction characteristics of low-frequency electromagnetic waves, high-frequency (above 1MHz) electromagnetic waves also have refractive and reflective properties that low-frequency electromagnetic waves rarely have. Therefore, aluminum, which has good conductivity, is selected as the material for the shielding cover 3.

[0032] The functional components include a rear camera 15, a rear macro camera 18, an infrared thermal imaging camera 19, and a flash 16, all mounted on the main control board 2 near the rear cover 12. One end of each of the rear camera 15, the rear macro camera 18, the infrared thermal imaging camera 19, and the flash 16 extends out of the shielding cover 3, and each of the rear camera 15, the rear macro camera 18, the infrared thermal imaging camera 19, and the flash 16 is provided with a shielding element.

[0033] The shielding element also includes a shielding window 7, which is designed to have high shielding effectiveness across the entire wavelength band. A rear window is provided on the rear cover 12 at the positions corresponding to the rear camera 15 and the rear macro camera 18. The shielding window 7 is installed on the inner side of the rear cover 12 and can cover both rear windows. The outer edge of the shielding window 7 is bonded and fixed to the inner side of the rear cover 12 with high-performance conductive adhesive. For the rear camera 15, after acquiring images through the shielding window 7, it can meet the user's requirements for shooting effect and also meet the requirements for shielding effectiveness.

[0034] The rear cover 12 has a light outlet corresponding to the position of the flash 16. The flash 16 is equipped with a lens hood 4, a mounting bracket 6, and a diffuser 8. The lens hood 4 is installed on the outer periphery of the flash 16 near the rear cover 12. It can effectively block unnecessary light from the surrounding environment from entering the lens, prevent these stray lights from interfering with the light from the flash 16, and reduce the scattering of light in all directions, thereby improving the contrast and clarity of the captured image and making the colors purer. The mounting bracket 6 is installed at the light outlet, and the middle of the mounting bracket 6 is open for light transmission. The diffuser 8 is installed on the mounting bracket 6, and the mounting bracket 6 is located between the lens hood 4 and the diffuser 8.

[0035] The shielding element also includes a ring of highly transparent conductive metal mesh 5. The conductive metal mesh 5 is pasted around the perimeter with copper foil without affecting the operation of the flash 16, reducing electromagnetic emissions or related interference from the main control board 2 circuit. This ensures that even if related electromagnetic emissions leak, they cannot be detected, thus better meeting the shielding requirements. The conductive metal mesh 5 is installed on the bracket 6 on the side away from the lens hood 4, and one side of the conductive metal mesh 5 contacts the diffuser 8. The diffuser 8 can significantly soften the light emitted by the flash 16, making the light softer and more natural, thereby optimizing the shooting effect.

[0036] The shielding element also includes an omnidirectional conductive foam layer with a three-dimensional shielding effect. The conductive foam layer 11 is arranged around the outer periphery of the image acquisition end of the infrared thermal imaging camera 19, with one end of the conductive foam layer 11 in close contact with the base of the infrared thermal imaging camera 19, the other end in close contact with the inner wall of the back cover 12, and the outer periphery of the conductive foam layer 11 in close contact with the shielding cover 3. In actual installation, the conductive foam layer 11 is pressed by tightening the screws between the back cover 12 and the middle frame 1. The conductive foam layer 11 is deformed by compression to ensure electrical continuity and achieve a better shielding effect.

[0037] The back cover 12 has a germanium glass layer 10 installed at the position corresponding to the infrared thermal imaging camera 19. The outer periphery of the germanium glass layer 10 is bonded to the back cover 12 with high-performance conductive adhesive. The germanium glass layer 10 can help the infrared thermal imaging camera 19 to clearly detect targets in complex environments, without being too much affected by bad weather and environment, thus improving the safety and accuracy of military operations.

[0038] The upper end face of the middle frame 1 is provided with a limiting groove, which is located near the outer ring of the middle frame 1. The lower end face of the back cover 12 is provided with a limiting protrusion, which is located near the outer ring of the back cover 12. A conductive rubber strip 13 is embedded in the limiting groove. The conductive rubber strip 13 is preferably a hollow aluminum silver-plated conductive rubber strip. The middle frame 1 and the back cover 12 are connected by screws, and the limiting protrusion can be embedded in the limiting groove and press the conductive rubber strip 13. The conductive rubber strip is squeezed and deformed by the concave-convex mating structure to meet the electrical continuity and achieve the shielding effectiveness requirements.

[0039] In this embodiment, after the connection cable 17 on the main control board 2 is installed, the connection cable 17 is fixed by screwing on the cable clamp 9 to ensure that the connection cable 17 will not move or shake at will, thereby ensuring the safety and stability of the connection cable 17 and better meeting the requirements of ship vibration test.

[0040] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A shielding structure for the main control board of a low-leakage handheld smart terminal, characterized in that: The device includes a mid-frame, a main control board, functional components, a rear cover, and a shielding assembly. The inner side of the mid-frame has a mounting groove for mounting the main control board. The rear cover is fastened to one side of the mid-frame, and a mounting cavity is formed between the rear cover and the mid-frame. The main control board is located in the mounting cavity, and the functional components are mounted on the main control board. The shielding assembly includes a shielding cover and a shielding element. The shielding cover is mounted on the side of the main control board near the rear cover, and a shielding cavity is formed between the shielding cover and the main control board. The functional components are mounted in the shielding cavity, and the shielding element is mounted on the outer periphery of the main control board and at the location of the functional components.

2. The main board shielding structure of a low-radiation handheld intelligent terminal according to claim 1, characterized in that: The shielding element includes a copper plating layer that covers the outer ring of the main control board. One end of the copper plating layer extends to the upper surface of the main control board and is in close contact with the middle frame. The other end of the copper plating layer extends to the lower surface of the main control board and is in close contact with the shielding cover.

3. The main board shielding structure of a low-radiation handheld intelligent terminal according to claim 1, characterized in that: The shield is made of metal.

4. The main board shielding structure of a low-radiation handheld intelligent terminal according to claim 1, characterized in that: The functional components include a rear camera, a rear macro camera, an infrared thermal imaging camera, and a flash, all mounted on the main control board near the rear cover. One end of each of the rear camera, the rear macro camera, the infrared thermal imaging camera, and the flash extends out of the shielding cover, and the shielding element is provided at each of the rear camera, the rear macro camera, the infrared thermal imaging camera, and the flash.

5. The main board shielding structure of a low-radiation handheld intelligent terminal according to claim 4, characterized in that: The shielding element also includes a shielding window. A rear window is provided on the rear cover at the position corresponding to the rear camera and the rear macro camera. The shielding window is installed on the inner side of the rear cover and can cover the two rear windows. The outer edge of the shielding window is bonded and fixed to the inner side of the rear cover.

6. The shielding structure of the main control board of the low-leakage handheld smart terminal according to claim 4, characterized in that: The back cover has a light outlet corresponding to the position of the flash lamp. The flash lamp is provided with a light shield, a mounting bracket, and a diffuser. The light shield is installed on the outer periphery of the flash lamp near the back cover. The mounting bracket is installed at the light outlet and has an opening in the middle for light transmission. The diffuser is installed on the mounting bracket and the mounting bracket is located between the light shield and the diffuser.

7. The shield structure for a main board of a low-radiation handheld intelligent terminal according to claim 6, characterized in that: The shielding element also includes a ring of conductive metal mesh film, which is mounted on the bracket on the side away from the light shield, and one side of the conductive metal mesh film contacts the diffuser.

8. The shield structure for a main board of a low radiation handheld intelligent terminal according to claim 4, characterized in that: The shielding element further includes a conductive foam layer, which is arranged around the outer periphery of the image acquisition end of the infrared thermal imaging camera. One end of the conductive foam layer is in close contact with the base of the infrared thermal imaging camera, the other end of the conductive foam layer is in close contact with the inner wall of the back cover, and the outer periphery of the conductive foam layer is in close contact with the shielding cover.

9. The shield structure for a main board of a low-radiation handheld intelligent terminal according to claim 8, characterized in that: The back cover has a germanium glass layer installed at the position corresponding to the infrared thermal imaging camera, and the outer periphery of the germanium glass layer is bonded to the back cover with conductive adhesive.

10. The main board shielding structure of a low-radiation handheld intelligent terminal according to claim 1, characterized in that: The upper end face of the middle frame is provided with a limiting groove, which is located near the outer ring of the middle frame. The lower end face of the back cover is provided with a limiting protrusion, which is located near the outer ring of the back cover. A conductive rubber strip is embedded in the limiting groove. The middle frame and the back cover are connected by screws, and the limiting protrusion can be embedded in the limiting groove and press the conductive rubber strip.

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