Industrial communication terminal housing structure resistant to electromagnetic interference

Abstract

The utility model relates to industrial communication terminal shell technical field, concretely is an industrial communication terminal shell structure of anti-electromagnetic interference, including the casing, be provided with the cavity in the casing, the casing vertical wall is provided with the switch door, the switch door with the cavity adaptation, both sides of casing are provided with the heat dissipation mouth, the heat dissipation mouth outside is provided with the auxiliary radiating component, the casing back wall is provided with silica gel channel, the silica gel channel with the cavity is through, the inlet of silica gel channel is provided with the bunching ring, the auxiliary radiating component includes sealing plate, the heat dissipation board, the rotary rod, the moving link, the moving block, the protection box and motor, form the multistage protection mechanism of " reflection - block - absorption", ensure that the heat dissipation mouth becomes the part of electromagnetic shield under the non - working condition, avoid the shielding weak point caused by traditional fixed heat dissipation hole.

Description

Technical Field

[0001] This utility model relates to the field of industrial communication terminal housing technology, specifically to an anti-electromagnetic interference industrial communication terminal housing structure. Background Technology

[0002] As we all know, existing industrial communication terminals, as core equipment for data transmission and command interaction in industrial production, play a crucial role in ensuring the stable operation of production lines and enabling collaborative operation of equipment. They need to maintain efficient communication with host computer systems and cloud platforms while transmitting equipment operating parameters and control commands in real time. Their performance directly affects production efficiency and product quality.

[0003] However, the industrial environment is filled with a large number of complex electromagnetic interference sources, which seriously threaten the stable operation of industrial communication terminals. Once interference signals such as pulsed electromagnetic signals generated when high-power motors start up, high-frequency harmonics when frequency converters are working, and strong electromagnetic radiation caused by welding machines enter the communication terminal, they may cause data transmission errors, communication signal attenuation, equipment stagnation, and production process interruption. In severe cases, they may directly damage the sensitive electronic components inside the terminal, causing equipment failure or even safety accidents.

[0004] Existing industrial communication terminal housings have many shortcomings in terms of electromagnetic interference resistance. Most housings are simply encapsulated with ordinary metal materials, which can provide basic physical protection, but there are a lot of electromagnetic leakage gaps at the joints, heat dissipation vents, and cable entry and exit points. As a result, the failure rate of existing industrial communication terminals in complex electromagnetic environments remains high. Frequent maintenance and repair not only increase the operating costs of enterprises, but also seriously restrict the efficient development of industrial automation. Utility Model Content

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides an anti-electromagnetic interference industrial communication terminal housing structure.

[0006] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: an anti-electromagnetic interference industrial communication terminal housing structure, including a housing, a cavity provided inside the housing, a switch door provided on the front side wall of the housing, the switch door being adapted to the cavity, heat dissipation vents provided on both sides of the housing, auxiliary heat dissipation components provided outside the heat dissipation vents, a silicone channel provided on the rear side wall of the housing, the silicone channel communicating with the cavity, and a wire harness ring provided at the entrance of the silicone channel.

[0007] To achieve the opening and closing of the sealing plate and the heat dissipation plate, this utility model improves upon the following: the auxiliary heat dissipation assembly includes a sealing plate, a heat dissipation plate, a rotating rod, a moving rod, a moving block, a protective box, and a motor. The protective boxes are symmetrically arranged on both sides of the heat dissipation opening. The rotating rod and the moving rod both pass through the corresponding protective boxes. The moving blocks are symmetrically arranged. The rotating rod passes through one of the moving blocks and is threadedly connected to it. The moving rod passes through the other moving block and is slidably connected to it. The moving blocks are fitted and slidably connected to the inner wall of the protective boxes. The motor is located on the upper side wall of one of the protective boxes. The upper end of the rotating rod is connected to the output end of the motor. The sealing plate is located between the two moving blocks. The heat dissipation plate is located at the lower end of the sealing plate. Both the sealing plate and the heat dissipation plate are adapted to and fitted to the heat dissipation opening. The heat dissipation plate is provided with mesh holes.

[0008] To prevent electromagnetic signals from leaking from the door opening and closing mechanism, this invention includes the following improvement: a conductive rubber sealing ring is provided between the door opening and closing mechanism and the housing, and the conductive rubber sealing ring is embedded in a groove on the edge of the door opening and closing mechanism.

[0009] To improve the mechanical properties and electromagnetic shielding effect of the shell, the present invention includes the following improvements: the shell is made of a composite material of stainless steel and copper alloy, the stainless steel layer is used to enhance mechanical strength, and the copper alloy layer is used to improve electromagnetic shielding performance.

[0010] To prevent electromagnetic signals from entering or exiting through the cable channel, the present invention is improved by providing a metal shielding mesh inside the silicone channel, the metal shielding mesh being woven from copper wire.

[0011] To further enhance the electrical connection at the sealing point, the present invention is improved by providing flexible conductive adhesive strips on the edges of both the sealing plate and the heat sink.

[0012] To reduce electromagnetic scattering caused by sharp edges and corners, the present invention has the following improvements: the mesh on the heat sink is arranged in a honeycomb pattern, the mesh diameter is 2mm, the center-to-center distance between adjacent meshes is 3mm, and the edges of the meshes are rounded.

[0013] In order to absorb residual electromagnetic signals entering the shell, the present invention is improved by providing an electromagnetic absorption layer on the inner wall of the shell, the electromagnetic absorption layer being made of ferrite composite material.

[0014] (III) Beneficial Effects Compared with the prior art, this utility model provides an electromagnetic interference resistant industrial communication terminal housing structure, which has the following beneficial effects: The electromagnetic interference resistant industrial communication terminal housing structure includes a shell, a stainless steel and copper alloy composite shell that provides a basic shielding layer, reflecting most of the external electromagnetic interference; conductive rubber sealing rings fill the gaps in the opening and closing doors, blocking electromagnetic leakage paths; a metal shielding mesh inside the silicone channel wraps the cable to prevent electromagnetic signals from being conducted along the line; and a ferrite electromagnetic absorption layer further absorbs residual interference, forming a multi-level protection mechanism of "reflection-blocking-absorption".

[0015] Equipped with auxiliary heat dissipation components, a motor-driven rotating rod moves the sealing plate and heat sink, automatically adjusting the opening and closing of the heat dissipation vents according to the terminal's operating temperature. The heat sink opens at high temperatures, utilizing the honeycomb mesh for efficient heat dissipation; it closes at low temperatures or in environments with strong interference, enhancing shielding performance and achieving a dynamic balance between heat dissipation and anti-interference. Flexible conductive strips are installed on the edges of the sealing plate and heat sink, forming a complete electrical connection with the housing when closed, ensuring that the heat dissipation vents become part of the electromagnetic shielding in the non-operating state, avoiding the weak points in shielding caused by traditional fixed heat dissipation holes. Attached Figure Description

[0016] Figure 1 This is a first-view schematic diagram of the structure of this utility model; Figure 2 This is a second-view schematic diagram of the structure of this utility model; Figure 3 This is a third-view schematic diagram of the structure of this utility model; Figure 4 This is an exploded view of the auxiliary heat dissipation component of the present invention.

[0017] In the diagram: 1. Housing; 2. Switch door; 3. Conductive rubber sealing ring; 4. Heat sink; 5. Sealing plate; 6. Motor; 7. Protective box; 8. Silicone channel; 9. Rotating rod; 10. Moving rod; 11. Moving block. Detailed Implementation

[0018] 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.

[0019] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] Please see Figure 1-4 An electromagnetic interference resistant industrial communication terminal housing structure includes a housing 1 with a cavity inside. A switch door 2 is located on the front side wall of the housing 1 and is adapted to the cavity. Heat dissipation vents are located on both sides of the housing 1, and auxiliary heat dissipation components are located outside the vents. A silicone channel 8 is located on the rear side wall of the housing 1, communicating with the cavity. A wire harness ring is located at the entrance of the silicone channel 8. The auxiliary heat dissipation components include a sealing plate 5, a heat dissipation plate 4, a rotating rod 9, a moving rod 10, a moving block 11, a protective box 7, and a motor 6. The protective boxes 7 are symmetrically arranged on both sides of the heat dissipation vents. The rotating rod 9 and the moving rod 10 both pass through their respective protective boxes 7. The moving blocks 11 are symmetrically arranged, and the rotating rod 9 passes through one of the moving blocks 11 and is threaded to it. The moving rod 10 passes through another moving block 11 and is slidably connected to it. The moving block 11 is fitted and slidably connected to the inner wall of the protective box 7. The motor 6 is on the upper side wall of one of the protective boxes 7. The upper end of the rotating rod 9 is connected to the output end of the motor 6. The sealing plate 5 is between the two moving blocks 11. The heat dissipation plate 4 is at the lower end of the sealing plate 5. Both the sealing plate 5 and the heat dissipation plate 4 are adapted to and fitted to the heat dissipation port. The heat dissipation plate 4 is provided with mesh holes. The silicone channel 8 is provided with a metal shielding mesh. The metal shielding mesh is woven from copper wire. Flexible conductive strips are provided on the edges of both the sealing plate 5 and the heat dissipation plate 4. The mesh holes on the heat dissipation plate 4 are arranged in a honeycomb pattern. The mesh hole diameter is 2mm, the center distance between adjacent mesh holes is 3mm, and the mesh hole edges are rounded.

[0021] During use, the industrial communication terminal (such as a PLC controller, industrial router, etc.) is fixed to the inner cavity of the housing 1 using a bracket or slot, ensuring that there is no rigid contact between the terminal and the housing 1 to reduce the transmission of mechanical vibration (this installation process is a mature technology for industrial communication terminals and will not be elaborated upon in this article). The communication cable is led out of the housing 1 through the silicone channel 8, and the cable tie is tightened. The annular protrusion on its inner wall enhances the sealing performance and prevents electromagnetic signals from leaking along the cable gaps. The metal shielding mesh wraps around the cable, forming a continuous electromagnetic shielding path. When the heat dissipation vent is closed, the flexible conductive adhesive strips on the edges of the sealing plate 5 and the heat dissipation plate 4 are tightly attached to the housing 1, blocking the electromagnetic leakage path. When heat dissipation is required, the motor 6 is started. The output of the motor 6 drives the rotating rod 9 to rotate. The moving block 11, which is threaded to the rotating rod 9, moves upward along the rod. At the same time, another moving block 11 slides synchronously on the moving rod 10, causing the sealing plate 5 and the heat dissipation plate 4 to rise smoothly. The heat dissipation plate 4 covers the heat dissipation vent. The honeycomb mesh on the heat dissipation plate 4 provides a large area of ​​heat dissipation channels, and hot air flows naturally through the mesh. The rounded corner design reduces airflow resistance and improves heat dissipation efficiency. Even when the heat dissipation vent is open, the small size of the honeycomb mesh (2mm aperture) can significantly attenuate electromagnetic waves through diffraction. When the temperature drops below the threshold (e.g., 40℃), the motor 6 reverses, the heat dissipation plate 4 falls back to the initial position, and the sealing plate 5 re-contacts the housing 1, restoring the integrity of electromagnetic shielding.

[0022] In practical use, it is necessary to achieve electrical conductivity, fill the gaps in the door, effectively prevent electromagnetic signals from leaking from the switch door 2, and enhance the overall shielding performance of the outer shell. To meet the above requirements, in this embodiment, a conductive rubber sealing ring 3 is provided between the switch door 2 and the shell 1. The conductive rubber sealing ring 3 is embedded in the groove on the edge of the switch door 2. When the switch door 2 is closed, the conductive rubber sealing ring 3 is compressed, filling the gap between the door and the housing 1, and at the same time, electrical conduction is achieved, so that the outer shell forms a complete Faraday cage structure.

[0023] In practical applications, it is necessary to improve the mechanical properties and electromagnetic shielding effect of the outer shell. To meet these requirements, in this embodiment, the shell 1 is made of a composite material of stainless steel and copper alloy. The stainless steel layer is used to enhance mechanical strength, and the copper alloy layer is used to improve electromagnetic shielding performance. The stainless steel layer provides mechanical protection, the copper alloy layer reflects high-frequency electromagnetic interference, and the ferrite electromagnetic absorption layer converts penetrating low-frequency electromagnetic waves into heat energy.

[0024] In actual use, it is necessary to absorb residual electromagnetic signals entering the housing 1. In order to meet the above requirements, in this embodiment, an electromagnetic absorption layer is provided on the inner wall of the housing 1, and the electromagnetic absorption layer is made of ferrite composite material.

[0025] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electromagnetic interference resistant industrial communication terminal housing structure, comprising a housing (1), characterized in that: The housing (1) has a cavity inside. The housing (1) has a switch door (2) on its front side wall. The switch door (2) is adapted to the cavity. The housing (1) has heat dissipation vents on both sides. The heat dissipation vents have auxiliary heat dissipation components on their outer sides. The housing (1) has a silicone channel (8) on its rear side wall. The silicone channel (8) is connected to the cavity. A wire harness ring is provided at the entrance of the silicone channel (8).

2. The electromagnetic interference resistant industrial communication terminal housing structure according to claim 1, characterized in that: The auxiliary heat dissipation assembly includes a sealing plate (5), a heat dissipation plate (4), a rotating rod (9), a moving rod (10), a moving block (11), a protective box (7), and a motor (6). The protective box (7) is symmetrically arranged on both sides of the heat dissipation port. The rotating rod (9) and the moving rod (10) both pass through the corresponding protective box (7). The moving blocks (11) are symmetrically arranged. The rotating rod (9) passes through one of the moving blocks (11) and is threadedly connected to it. The moving rod (10) passes through the other moving block (11). The moving block (11) is slidably connected to the moving block (11), and the moving block (11) is in contact with and slidably connected to the inner wall of the protective box (7). The motor (6) is on the upper side wall of one of the protective boxes (7). The upper end of the rotating rod (9) is connected to the output end of the motor (6). The sealing plate (5) is between the two moving blocks (11). The heat sink (4) is at the lower end of the sealing plate (5). The sealing plate (5) and the heat sink (4) are both adapted to and in contact with the heat dissipation port. The heat sink (4) is provided with mesh holes.

3. The electromagnetic interference resistant industrial communication terminal housing structure according to claim 1, characterized in that: A conductive rubber sealing ring (3) is provided between the switch door (2) and the housing (1), and the conductive rubber sealing ring (3) is embedded in the groove on the edge of the switch door (2).

4. The electromagnetic interference resistant industrial communication terminal housing structure according to claim 1, characterized in that: The housing (1) is made of a composite material of stainless steel and copper alloy. The stainless steel layer is used to enhance mechanical strength, and the copper alloy layer is used to improve electromagnetic shielding performance.

5. The electromagnetic interference resistant industrial communication terminal housing structure according to claim 1, characterized in that: The silicone channel (8) is equipped with a metal shielding mesh, which is made of copper wire.

6. The electromagnetic interference resistant industrial communication terminal housing structure according to claim 2, characterized in that: Flexible conductive strips are provided on the edges of both the sealing plate (5) and the heat dissipation plate (4).

7. The electromagnetic interference resistant industrial communication terminal housing structure according to claim 2, characterized in that: The mesh on the heat sink (4) is arranged in a honeycomb pattern. The mesh diameter is 2mm, the center-to-center distance between adjacent meshes is 3mm, and the edges of the meshes are rounded.

8. The electromagnetic interference resistant industrial communication terminal housing structure according to claim 1, characterized in that: The inner wall of the shell (1) is provided with an electromagnetic absorption layer, which is made of ferrite composite material.

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