Electronic information anti-interference device

Abstract

The utility model discloses an electronic information anti -interference device relates to electronic information equipment anti -interference technical field, including the shielding shell of both ends closed, has the inner shielding shell with the open mouth, the inner shielding shell outside fixedly sheathed shielding net, is equipped with the support column between both, the inner shielding shell both ends are equipped with arc -shaped guide slot, drive assembly is equipped in the shielding shell both ends, drive assembly includes gear and rack structure for driving shielding board along the open mouth sliding, shielding board sliding is equipped in the open mouth department of inner shielding shell, is connected with drive assembly, and the shielding range can be adjusted, installation component is equipped in the inner side of inner shielding shell, the utility model discloses the gear and rack structure drive shielding board along arc -shaped guide slot sliding of drive assembly, combines the sliding direction of guiding of guide block, realizes shielding board opening and closing angle adjustment, can according to electronic equipment diameter flexible adjustment shielding range.

Description

Technical Field

[0001] This utility model belongs to the field of anti-interference technology for electronic information equipment, specifically an electronic information anti-interference device. Background Technology

[0002] In the operation of electronic information equipment, interference suppressors are key devices to ensure stable signal transmission, reducing the impact of electromagnetic interference through the dual functions of shielding and filtering. In existing technologies, some interference suppressors employ a fixed-specification shielded housing design, achieving interference suppression through a sealed metal shell and built-in filtering modules. This can isolate external electromagnetic signals to a certain extent, meeting basic interference suppression requirements.

[0003] However, the fixed size of the opening in the shielding enclosure makes it impossible to flexibly adjust the shielding range according to electronic devices of different diameters. When the device size does not match the shielding enclosure, the excess open area becomes a channel for electromagnetic interference to penetrate, resulting in a significant decrease in shielding effectiveness. Furthermore, the fixed structure is difficult to adapt to diverse device installation scenarios; either the opening is too large, leading to insufficient interference protection, or the opening is too small to accommodate the device, making it difficult to meet the precise anti-interference requirements of electronic devices of different specifications in complex electromagnetic environments. Utility Model Content

[0004] The purpose of this invention is to provide an electronic information anti-interference device to solve the problem that the opening size of the shielding shell in the prior art is fixed, and the shielding range cannot be flexibly adjusted according to electronic devices of different diameters.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an electronic information anti-interference device, comprising:

[0006] The shielding shell is closed at both ends and has an inner shielding shell with an opening. A shielding mesh is fixedly sleeved on the outside of the inner shielding shell and a support column is provided between the two. The inner shielding shell has arc-shaped guide grooves at both ends.

[0007] The drive assembly, located at both ends of the shielding shell, includes a gear and rack structure for driving the shielding plate to slide along the opening;

[0008] The shielding plate is slidably disposed at the opening of the inner shielding shell and connected to the drive assembly, and the shielding range can be adjusted.

[0009] The mounting components are located inside the inner shielding shell and are used for the detachable installation of the signal filtering module.

[0010] The signal filtering module is fixed by mounting components and includes filtering circuits and interface components.

[0011] Preferably, the drive assembly includes a rotating shaft, a large gear, a small gear, and a rack. The rotating shaft is rotatably disposed at both ends of the inner shield shell. The large gear and the small gear are fixed to the rotating shaft. The rack is slidably disposed in an arc-shaped guide groove and meshes with the small gear. A knob is provided at the end of the rotating shaft.

[0012] Preferably, the shielding plate has an arc-shaped structure, and there are two of them symmetrically distributed. One end of the shielding plate is fixedly connected to the corresponding rack, and the other end of the shielding plate away from the rack is provided with a guide block. The guide block is slidably embedded in the arc-shaped guide groove and slides in the opposite direction to the rack in the same guide groove.

[0013] Preferably, the mounting assembly includes a guide rail, a magnetic block, and a magnetic plate. The guide rail is fixed to the inner side of the inner shielding shell and is the same length as the inner shielding shell. A groove is formed on the upper surface of the guide rail. The magnetic block is embedded in the bottom of the groove. The magnetic plate is located at the lower end of the signal filtering module and magnetically engages with the magnetic block.

[0014] Preferably, the slide groove is provided with a positioning component, including a U-shaped strip, a stop block, a pressure plate and positioning teeth. The U-shaped strip is embedded in the slide groove and located on both sides of the magnetic plate. The stop block is located in the middle of the U-shaped strip. The pressure plate is located on the upper surface of the U-shaped strip support arm. The positioning teeth are located on the side of the U-shaped strip support arm. The inner wall of the slide groove is provided with a tooth groove that cooperates with the positioning teeth.

[0015] Preferably, the filtering circuit of the signal filtering module adopts a multi-stage filtering structure, including a high-pass filter, a low-pass filter and a band-pass filter connected in sequence.

[0016] Preferably, the interface component includes an input interface and an output interface, both of which adopt SMA interfaces and are respectively located at both ends of the signal filtering module.

[0017] Preferably, the shielding mesh is a nickel-plated copper mesh, and the inner shielding shell is made of aluminum alloy.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. This utility model uses the gear and rack structure of the drive component to drive the shielding plate to slide along the arc-shaped guide groove. Combined with the sliding guidance of the guide block, the opening and closing angle of the shielding plate can be adjusted, and the shielding range can be flexibly adjusted according to the diameter of the electronic equipment.

[0020] 2. The signal filtering module of this utility model is initially fixed by magnetic attraction between the magnetic block of the mounting component and the magnetic plate, and then precisely locked by the U-shaped strip, stop and positioning teeth of the positioning component. No tools are required for installation, and the module can be disassembled by overcoming the magnetic attraction force. Compared with the traditional bolt fixing method, the maintenance time is greatly shortened and the module replacement efficiency is improved.

[0021] 3. This utility model forms an air gap through a double-layer shielding structure, which works in conjunction with the signal filtering module using a multi-level filtering structure to effectively filter electromagnetic signals in the 30-1000MHz frequency band and improve anti-interference capability. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0023] Figure 1 This is a first-view perspective three-dimensional structural diagram of an embodiment of the present utility model;

[0024] Figure 2 This is a second-view perspective three-dimensional structural diagram provided for an embodiment of the present utility model;

[0025] Figure 3 A third-view perspective three-dimensional structural diagram provided for an embodiment of this utility model;

[0026] Figure 4 A fourth-view perspective three-dimensional structural schematic diagram provided for an embodiment of this utility model;

[0027] Figure 5 A third-view perspective structural diagram provided for an embodiment of this utility model.

[0028] In the picture:

[0029] 1. Shielding outer shell; 101. Inner shielding shell; 102. Shielding mesh; 103. Support column; 2. Drive assembly; 201. Rotating shaft; 202. Large gear; 203. Small gear; 204. Rack; 3. Shielding plate; 4. Mounting assembly; 401. Guide rail; 402. Magnetic block; 403. Magnetic guide plate; 5. Signal filtering module; 6. Positioning assembly; 601. U-shaped bar; 602. Stop block; 603. Pressure plate; 604. Positioning tooth; 7. Guide block; 8. Knob. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0031] As attached Figure 1 To be continued Figure 5 As shown:

[0032] This utility model provides an electronic information anti-interference device, comprising: a shielding shell 1 closed at both ends, an inner shielding shell 101 with an opening, a shielding mesh 102 fixedly sleeved on the outside of the inner shielding shell 101, a support column 103 between the two, arc-shaped guide grooves at both ends of the inner shielding shell 101, and metal plates mounted on both ends of the inner shielding shell 101 by screws; a driving assembly 2, located at both ends of the shielding shell 1, including a gear and rack structure, for driving the shielding plate 3 to slide along the opening, the arc of the opening being 120°-160°; the shielding plate 3, slidably located at the opening of the inner shielding shell 101, connected to the driving assembly 2, and adjustable in shielding range; a mounting assembly 4, located inside the inner shielding shell 101, for detachably mounting a signal filtering module 5; the signal filtering module 5, fixed by the mounting assembly 4, including a filtering circuit and an interface assembly. The inner shielding shell 101 of the shielding shell 1 is made of 1.5mm thick aluminum alloy by stamping, the shielding mesh 102 is 80 mesh nickel-plated copper mesh, and the support column 103 has a diameter of 8mm and a length of 10mm.

[0033] During operation, the operator first adjusts the opening angle of the shielding plate 3 according to the size of the electronic device using the drive component 2 to adapt the shielding range to the device. Then, the signal filtering module 5 is fixed to the inside of the inner shielding shell 101 using the mounting component 4, and external equipment cables are connected. The double-layer shielding structure of the shielding shell 1 and the filtering function of the signal filtering module 5 work together to achieve anti-interference effect. This structure can flexibly adapt to devices of different sizes, and the dual anti-interference design improves the ability to suppress electromagnetic signals.

[0034] In one embodiment of this utility model, as shown in the appendix Figure 3 and attached Figure 5 As shown, the drive assembly 2 includes a rotating shaft 201, a large gear 202, a small gear 203, and a rack 204. The rotating shaft 201 is rotatably disposed at both ends of the inner shield shell 101. The large gear 202 and the small gear 203 are fixed to the rotating shaft 201. The rack 204 is slidably disposed in the arc-shaped guide groove and meshes with the small gear 203. A knob 8 is provided at the end of the rotating shaft 201.

[0035] During operation, the operator first turns the knob 8 to rotate the shaft 201, causing the large gear 202 and the small gear 203 to rotate synchronously. The small gear 203 drives the rack 204 to slide along the arc-shaped guide groove. Through the deceleration effect of the gear transmission (the transmission ratio of the large gear to the small gear is 2:1), the opening and closing angle of the shielding plate 3 can be precisely adjusted, which is labor-saving and has high control accuracy.

[0036] In one embodiment of this utility model, as shown in the appendix Figure 3 and attached Figure 5As shown, the shielding plate 3 has an arc-shaped structure, and there are two of them symmetrically distributed. One end of the shielding plate 3 is fixedly connected to the corresponding rack 204, and the other end of the shielding plate 3 away from the rack 204 is provided with a guide block 7. The guide block 7 is slidably embedded in the arc-shaped guide groove and slides in the opposite direction to the rack 204 in the same guide groove.

[0037] During operation, the operator first drives the rack 204 to slide through the drive component 2. The rack 204 pulls the shielding plate 3 to move along the opening, while the guide block 7 slides in the opposite direction along the arc-shaped guide groove. Through the counter-sliding cooperation between the guide block 7 and the rack 204, the shielding plate 3 slides smoothly and without jamming within the 0-120° opening and closing range, making it suitable for electronic devices of various diameter sizes.

[0038] In one embodiment of this utility model, as shown in the appendix Figure 4 and attached Figure 5 As shown, the mounting assembly 4 includes a guide rail 401, a magnetic block 402, and a magnetic plate 403. The guide rail 401 is fixed to the inner side of the inner shielding shell 101 and is the same length as the inner shielding shell 101. A groove is provided on the upper surface of the guide rail 401. The magnetic block 402 is embedded in the bottom of the groove. The magnetic plate 403 is located at the lower end of the signal filtering module 5 and magnetically engages with the magnetic block 402.

[0039] During operation, the operator first aligns the magnetic plate 403 at the lower end of the signal filtering module 5 with the groove of the guide rail 401 and pushes it in along the groove. The magnetic plate 403 and the magnetic block 402 magnetically adhere (with a magnetic force ≥ 5N), thus initially fixing the module. Through magnetic attraction and guide rail guidance, installation can be completed without tools, which is faster than traditional bolt fixing.

[0040] In one embodiment of this utility model, as shown in the appendix Figure 2 and attached Figure 5 As shown, the slide groove is provided with a positioning component 6, including a U-shaped strip 601, a stop block 602, a pressure plate 603 and a positioning tooth 604. The U-shaped strip 601 is embedded in the slide groove and located on both sides of the magnetic plate 403. The stop block 602 is located in the middle of the U-shaped strip 601. The pressure plate 603 is located on the upper surface of the support arm of the U-shaped strip 601. The positioning tooth 604 is located on the side of the support arm of the U-shaped strip 601. The inner wall of the slide groove is provided with a tooth groove that cooperates with the positioning tooth 604.

[0041] During operation, the operator first pushes the signal filtering module 5 to the stop block 602. The U-shaped bar 601 arm deforms elastically under the pressure of the module, and the positioning teeth 604 engage with the groove teeth. The pressure plate 603 fits tightly against the side of the module. Through the engagement of the positioning teeth 604 and the friction of the pressure plate 603, the module is precisely locked with a positioning accuracy of ±0.5mm, preventing loosening during use.

[0042] In one embodiment of this utility model, as shown in the appendix Figure 2 and attached Figure 5 As shown, the filtering circuit of the signal filtering module 5 adopts a multi-stage filtering structure, including a high-pass filter, a low-pass filter and a band-pass filter connected in sequence.

[0043] During operation, the external signal first enters the signal filtering module 5 through the input interface. It then passes through a high-pass filter (cutoff frequency 30MHz) to filter out low-frequency interference, a low-pass filter (cutoff frequency 1000MHz) to filter out high-frequency interference, and finally passes through a band-pass filter (center frequency 500MHz, bandwidth 200MHz) to output the effective signal. Through the synergistic effect of the three-stage filtering, interference signals in the 30-1000MHz frequency band are suppressed by ≥40dB, improving signal purity.

[0044] In one embodiment of this utility model, the interface component includes an input interface and an output interface, both of which adopt SMA interfaces and are respectively located at both ends of the signal filtering module 5.

[0045] During operation, the operator first connects the shielded cable connector of the external device to the SMA input interface of the signal filtering module 5, and the output interface is connected to the receiving device via a cable. The threaded connection structure of the SMA interface (characteristic impedance 50Ω) ensures a tight connection, reduces signal transmission loss (insertion loss ≤2dB), and meets the requirements for stable transmission of radio frequency signals.

[0046] In one embodiment of this utility model, the shielding mesh 102 is a nickel-plated copper mesh, and the inner shielding shell 101 is made of aluminum alloy.

[0047] During operation, the inner shielding shell 101 (aluminum alloy, 1.5mm thick) and the shielding mesh 102 (80-mesh nickel-plated copper mesh) form an air gap (0.5cm) through the support column 103. The shielding plate 3 and the shielding structure of the inner shielding shell 101 fit together seamlessly. The high conductivity of the aluminum alloy and the low oxidation characteristics of the nickel-plated copper mesh combine to achieve a shielding effectiveness of ≥60dB in the 30-1000MHz frequency band, enhancing the electromagnetic isolation effect.

[0048] Working principle: First, the operator adjusts the shielding range according to the size of the electronic equipment. Turning the knobs 8 clockwise on both sides causes the shaft 201 to rotate, driving the large gear 202 and the small gear 203. The small gear 203 drives the rack 204 to slide along the arc-shaped guide groove, and the rack 204 moves the shielding plate 3 towards the center of the opening. When the diameter of the opening of the shielding plate 3 is adjusted to the appropriate size, the knobs are stopped. At this point, the shielding range matches the equipment, and the shielding effectiveness reaches 65dB.

[0049] Align the magnetic plate 403 at the bottom of the module with the groove of the guide rail 401 and push it in along the groove. The magnetic plate 403 and the magnetic block 402 magnetically adhere to each other (pull force 5N), initially fixing the module. Continue pushing until the stop block 602 contacts the front end of the module. At this time, the positioning teeth 604 of the U-shaped strip 601 engage with the groove teeth, and the pressure plate 603 tightly adheres to the side of the module, completing precise locking. The entire installation process takes about 30 seconds and requires no tools.

[0050] Connect the output of the communication module to the input interface of the signal filtering module 5 via an SMA cable. Connect the module's output interface to the receiving device and turn on the power. The filtering circuit performs multi-stage filtering on interference signals in the 30-1000MHz frequency band.

[0051] When the signal filtering module 5 needs maintenance, the staff pulls the module outward along the slide groove to overcome the attraction (5N) of the magnetic block 402. The positioning tooth 604 disengages from the tooth groove, the U-shaped strip 601 deforms elastically, and the pressure plate 603 loosens the side of the module, so the module can be taken out. The process takes about 20 seconds.

[0052] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An electronic information anti-interference device, characterized in that, include: The shielding shell (1) is closed at both ends and has an inner shielding shell (101) with an open opening. A shielding mesh (102) is fixedly sleeved on the outside of the inner shielding shell (101), and a support column (103) is provided between the two. The inner shielding shell (101) has arc-shaped guide grooves at both ends. The drive assembly (2) is located at both ends of the shielding shell (1) and includes a gear and rack structure for driving the shielding plate (3) to slide along the opening; The shielding plate (3) is slidably disposed at the opening of the inner shielding shell (101) and connected to the drive assembly (2), and the shielding range can be adjusted. The mounting component (4) is located inside the inner shielding shell (101) and is used for the detachable installation of the signal filtering module (5); The signal filtering module (5) is fixed by the mounting component (4) and includes a filtering circuit and an interface component.

2. The electronic information anti-interference device as described in claim 1, characterized in that, The drive assembly (2) includes a rotating shaft (201), a large gear (202), a small gear (203), and a rack (204). The rotating shaft (201) is rotatably disposed at both ends of the inner shield shell (101). The large gear (202) and the small gear (203) are fixed to the rotating shaft (201). The rack (204) is slidably disposed in the arc-shaped guide groove and meshes with the small gear (203). A knob (8) is provided at the end of the rotating shaft (201).

3. The electronic information anti-interference device as described in claim 1, characterized in that, The shielding plate (3) has an arc-shaped structure, and there are two of them symmetrically distributed. One end of the shielding plate (3) is fixedly connected to the corresponding rack (204), and the other end of the shielding plate (3) away from the rack (204) is provided with a guide block (7). The guide block (7) is slidably embedded in the arc-shaped guide groove and slides in the opposite direction to the rack (204) in the same guide groove.

4. The electronic information anti-interference device as described in claim 1, characterized in that, The mounting assembly (4) includes a guide rail (401), a magnetic block (402), and a magnetic guide plate (403). The guide rail (401) is fixed to the inner side of the inner shielding shell (101) and is the same length as the inner shielding shell (101). A groove is provided on the upper surface of the guide rail (401). The magnetic block (402) is embedded in the bottom of the groove. The magnetic guide plate (403) is located at the lower end of the signal filtering module (5) and magnetically engages with the magnetic block (402).

5. An electronic information anti-interference device as described in claim 4, characterized in that, The chute is provided with a positioning component (6), including a U-shaped strip (601), a stop (602), a pressure plate (603), and positioning teeth (604). The U-shaped strip (601) is embedded in the chute and located on both sides of the magnetic guide plate (403). The stop (602) is located in the middle of the U-shaped strip (601). The pressure plate (603) is located on the upper surface of the support arm of the U-shaped strip (601). The positioning teeth (604) are located on the side of the support arm of the U-shaped strip (601). The inner wall of the chute is provided with a tooth groove that cooperates with the positioning teeth (604).

6. The electronic information anti-interference device as described in claim 1, characterized in that, The signal filtering module (5) adopts a multi-stage filtering structure, including a high-pass filter, a low-pass filter and a band-pass filter connected in sequence.

7. An electronic information anti-interference device as described in claim 1, characterized in that, The interface component includes an input interface and an output interface, both of which use SMA interfaces and are located at both ends of the signal filtering module (5).

8. An electronic information anti-interference device as described in claim 1, characterized in that, The shielding mesh (102) is a nickel-plated copper mesh, and the inner shielding shell (101) is made of aluminum alloy.

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