Circuit anti-interference shielding structure of sonar circuit board

Abstract

The utility model discloses a sonar circuit board line anti-interference shielding structure which comprises a shielding box, a plurality of installation pipes are installed on the shielding box, fixing blocks are fixedly arranged on the installation pipes, a fixing cover is fixedly arranged in the shielding box, a driving motor is arranged in the fixing cover, and the driving motor is connected with the shielding box. A screw rod connected with the driving motor is arranged in the fixing cover through a supporting plate, a lifting frame is arranged above the shielding box, the lifting frame is connected with the screw rod through a connecting mechanism, and connecting grooves are formed in the ends of branches of the lifting frame. The metal pipeline penetrating through the wall of the shielding box is conductively connected with the shielding box and serves as a line access channel, shielding continuity is continued, and the metal pipeline is equivalent to an extension structure of the shielding box. And meanwhile, the fixed block and the movable block are matched and matched with the anti-skid grains, so that the wire body penetrating through the mounting pipe can be clamped and fixed, the stability of the wire body is ensured, and the wire body can be prevented from being dragged to be separated from the circuit board.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic compatibility design technology for sonar equipment, and in particular to an anti-interference shielding structure for sonar circuit boards. Background Technology

[0002] Sonar circuit boards are conductive lines made of conductive materials such as copper foil, forming a circuit network that enables signal transmission, reception, and processing. They are the core of the sonar system's electrical connections. The anti-interference shielding structure isolates external electromagnetic fields, preventing signal distortion. It also prevents electromagnetic signal leakage from affecting other equipment or systems. This ensures accurate sonar signal transmission and improves detection and positioning precision.

[0003] In electronic systems such as sonar equipment, existing shielding structures generally exhibit a design tendency that prioritizes shielding over securing, particularly lacking effective restraint for cables outside the shielding enclosure. When external cables are subjected to unexpected tension (such as equipment movement or human contact), the tension acts directly on the solder joints or connectors between the cable and the circuit board, causing the cable to detach from the circuit board pads. For example, if the equipment is installed in a vibrating environment such as a ship's deck, the constant swaying of external cables due to waves can lead to connection failure over time, resulting in sonar signal interruption or false alarms. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an anti-interference shielding structure for sonar circuit boards.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An anti-interference shielding structure for sonar circuit boards includes a shielding box, on which multiple mounting tubes are installed, and a fixing block is fixedly mounted on each mounting tube. A fixing cover is fixedly mounted inside the shielding box, and a drive motor is installed inside the fixing cover. A screw connected to the drive motor is provided inside the fixing cover via a support plate. A lifting frame is provided above the shielding box, and the lifting frame is connected to the screw via a connecting mechanism. The ends of the branches of the lifting frame are provided with connecting grooves, and connecting rods are provided in the connecting grooves via an elastic mechanism. The ends of the connecting rods are provided with movable blocks corresponding to the fixing blocks.

[0007] Preferably, the connecting mechanism includes a connecting frame threaded onto a screw, the end of which is fixedly connected to the lifting frame.

[0008] Preferably, the elastic mechanism includes a spring disposed in the connecting groove, with both ends of the spring connected to the inner wall of the connecting groove and the outer wall of the connecting rod, respectively.

[0009] Preferably, the surfaces of the fixed block and the movable block that contact the circuit are both arc-shaped, and the surfaces of the fixed block and the movable block that contact the circuit are provided with anti-slip textures.

[0010] Preferably, the shielding box is equipped with an air inlet pipe and an air outlet pipe located inside a fixed cover, and an exhaust fan is provided inside the air outlet pipe.

[0011] Preferably, a vertical rod parallel to the screw is provided between the inner wall of the shielding box and the support plate, and the vertical rod slides through the connecting frame.

[0012] The beneficial effects of this utility model are:

[0013] 1. The enclosure is made of conductive metal material and the inner wall is conductive and grounded to form a complete electromagnetic shielding space, blocking the intrusion of external electromagnetic interference and internal electromagnetic leakage.

[0014] 2. A metal pipe that runs through the wall of the shielding box is electrically connected to the shielding box and serves as a channel for the line to enter and exit, continuing the continuity of the shielding and effectively acting as an extension structure of the shielding box.

[0015] 3. The fixed block and the movable block work together with anti-slip texture to clamp and fix the wire passing through the mounting tube, ensuring the stability of the wire and preventing the wire from being dragged and detached from the circuit board. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the anti-interference shielding structure for the sonar circuit board proposed in this utility model.

[0017] Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A;

[0018] Figure 3 This is a schematic diagram of the connecting rod and the spring.

[0019] Figure 4 for Figure 1 A schematic diagram of the structure after vertical sectioning;

[0020] Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point B.

[0021] In the diagram: 1. Shielding box, 2. Mounting pipe, 3. Lifting frame, 4. Fixed block, 5. Movable block, 6. Connecting rod, 7. Spring, 8. Inlet pipe, 9. Outlet pipe, 10. Fixed cover, 11. Support plate, 12. Screw, 13. Connecting frame, 14. Drive motor. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figure 1-4 This utility model relates to an anti-interference shielding structure for sonar circuit boards. The shielding box 1 is the main body and is a fully enclosed metal box made of conductive materials (such as aluminum alloy). The inner wall is treated with conductivity (such as electroplating) and reliably grounded to form a complete electromagnetic shielding space, which effectively blocks the intrusion of external electromagnetic interference (such as radio frequency signals and harmonics from industrial equipment) and suppresses the leakage of electromagnetic signals from the circuit board itself.

[0024] Multiple mounting pipes 2 are installed through the wall of the shielding box 1. The mounting pipes are made of metal and are fixed to the shielding box 1 by welding or conductive connectors to ensure electrical conductivity between the two. The mounting pipes 2 become an extension structure of the shielding box 1, continuing the shielding continuity.

[0025] The installation pipe 2 serves as the channel for the line to enter and exit the shielding box 1. Its quantity and layout are designed according to the line requirements, and the inner diameter of a single pipe is adapted to the outer diameter of the cable.

[0026] The inner wall of the mounting tube 2 is fixed with a fixing block 4. The working surface of the fixing block 4 that contacts the line is arc-shaped, and the arc matches the outer contour of the cable. The surface is processed with anti-slip texture to stabilize the cable and provide physical support.

[0027] The lifting frame 3 is a metal frame structure, connected to the drive assembly via a connecting mechanism, and can move vertically within the shielding box 1. Connecting slots are provided at the ends of its branches, housing connecting rods 6.

[0028] The connecting rod 6 is connected to the connecting groove through an elastic mechanism (spring 7). One end of the spring 7 is fixed to the inner wall of the connecting groove, and the other end abuts against the connecting rod 6, so that the connecting rod 6 can slide along the groove and provide elastic force.

[0029] The movable block 5 is fixed to the end of the connecting rod 6, corresponding to the position of the fixed block 4. The contact surfaces of both are arc-shaped and have anti-slip textures. When the spring 7 is compressed, the movable block 5 moves towards the fixed block 4 under the action of elastic force, clamping the cable; when the spring 7 is extended, the movable block 5 moves away from the fixed block 4, releasing the cable.

[0030] The fixed cover 10 is located inside the shielding box 1. It is an independent cavity made of shielding material and is used to isolate the built-in drive motor 14 to prevent electromagnetic noise generated during motor operation from interfering with the circuit board.

[0031] The drive motor 14 is fixed inside the fixed cover 10 by the support plate 11, and its output shaft is connected to the screw 12. The screw 12 is engaged with the connecting frame 13 through a threaded pair. When the drive motor 14 rotates, the screw 12 drives the connecting frame 13 to move in the vertical direction, thereby driving the lifting frame 3 to rise and fall synchronously.

[0032] The vertical rod is set parallel to the screw 12, with one end fixed to the inner wall of the shielding box 1 and the other end positioned by the support plate 11. The connecting frame 13 is slidably sleeved on the outside of the vertical rod, restricting the rotational freedom of the connecting frame 13 and ensuring the stability of the lifting frame 3 when it moves vertically.

[0033] The intake pipe 8 and the exhaust pipe 9 pass through the shielding box 1. The intake pipe 8 is used to introduce cold outside air, and the exhaust pipe 9 houses an exhaust fan. Alternatively, the shielding box 1 can be equipped with both an intake pipe 8 and an exhaust pipe 9, with the inlet of the intake pipe 8 being much lower than the inlet of the exhaust pipe 9 to prevent the heat discharged from the exhaust pipe 9 from being drawn into the intake pipe 8. When the exhaust fan is running, the heat inside the fixed cover 10 or the shielding box 1 is expelled, and the intake pipe 8 draws in cold outside air to complete the circulation, preventing the drive motor 14 or the circuit boards and components inside the shielding box 1 from overheating and affecting their performance.

[0034] Components not specifically described in this utility model are all standard parts and can be purchased from the market. The specific connection methods for each component all employ mature methods from the prior art, and will not be detailed here. Content not described in detail in this specification belongs to prior art known to those skilled in the art.

[0035] In use, the wire extends through the mounting tube 2 to the outside of the shielding box 1. The outer wall is held and fixed by the fixing block 4 and the movable block 5, preventing it from detaching from the circuit board inside the shielding box 1 due to external dragging. Specifically:

[0036] After the drive motor 14 starts, it can drive the screw 12 to rotate. At this time, the connecting frame 13 can drive the lifting frame 3 to descend. The lifting frame 3, the connecting rod 6 and the movable block 5 descend. The movable block 5 finally cooperates with the fixed block 4 to clamp and fix the line. At this time, the spring 7 is in a compressed state. Its tendency to return ensures the force of the movable block 5 and the fixed block 4 to clamp and fix the line, ensuring stability.

[0037] When the drive motor 14 inside the fixed cover 10 is working, it can activate the exhaust fan inside the air outlet pipe 9, which, together with the air inlet pipe 8, achieves ventilation and cooling operations. The same structure can be installed on the shielded box 1 to achieve ventilation and cooling operations, ensuring the safety and stability of the equipment.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A structure for shielding against interference in a circuit board line of a sonar, comprising a shield case (1), characterized in that, The shielding box (1) is provided with a plurality of mounting pipes (2), the mounting pipes (2) are fixedly provided with fixed blocks (4), the shielding box (1) is fixedly provided with a fixed cover (10), the fixed cover (10) is provided with a driving motor (14), the fixed cover (10) is provided with a screw rod (12) connected with the driving motor (14) through a support plate (11), the shielding box (1) is provided with a lifting frame (3) above, the lifting frame (3) is connected with the screw rod (12) through a connecting mechanism, the lifting frame (3) is provided with a connecting groove at the branch end, the connecting groove is provided with a connecting rod (6) through an elastic mechanism, and the connecting rod (6) is provided with a movable block (5) corresponding to the fixed block (4) at the end.

2. The sonar circuit board line noise shield structure according to claim 1, wherein, The connecting mechanism comprises a connecting frame (13) threadedly sleeved on the screw rod (12), and the connecting frame (13) is fixedly connected with the lifting frame (3) at the end.

3. The sonar circuit board line noise shield structure of claim 2, wherein, The elastic mechanism comprises a spring (7) arranged in the connecting groove, and the spring (7) is connected with the inner wall of the connecting groove and the outer wall of the connecting rod (6) at both ends.

4. The sonar circuit board line noise shield structure of claim 3, wherein, The surface of the fixed block (4) and the movable block (5) in contact with the line is arc-shaped, and the surface of the fixed block (4) and the movable block (5) in contact with the line is provided with anti-skid lines.

5. The sonar circuit board line noise shield structure of claim 4, wherein, The shielding box (1) is provided with an air inlet pipe (8) and an air outlet pipe (9) in the fixed cover (10), and the air outlet pipe (9) is provided with an exhaust fan.

6. The sonar circuit board line noise shield structure of claim 5, wherein, A vertical rod parallel to the screw rod (12) is arranged between the inner wall of the shielding box (1) and the support plate (11), and the vertical rod slidably penetrates the connecting frame (13).

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