Control box with electromagnetic shielding structure

Abstract

The utility model discloses a control box with an electromagnetic shielding structure, which relates to the technical field of signal transmission and comprises a connecting plate, an outer box and an inner box. The connecting plate is used for being attached to and fixed to the outer side face of a cabin wall of a cabin body, the outer box is arranged on one side face of the connecting plate, the inner box is arranged on the other side face of the connecting plate, and when the connecting plate is attached to and fixed to the outer side face of the cabin wall, the outer box is used for penetrating into the cabin body from an opening of the cabin wall; the electromagnetic shielding piece is used for being attached to the bulkhead and is arranged opposite to the connecting plate; according to the technical scheme provided by the utility model, the electromagnetic shielding piece which can be arranged opposite to the connecting plate is attached to the bulkhead, so that the situation that signal transmission between the outer box and the inner box is interfered due to electromagnetic leakage at the connecting part of the connecting plate and the bulkhead when the connecting plate and the bulkhead are fastened and mounted is avoided; therefore, the transmission stability of signal transfer of the control box can be improved.

Description

Technical Field

[0001] This utility model relates to the field of signal transmission technology, and in particular to a control box with an electromagnetic shielding structure. Background Technology

[0002] Vehicle-mounted signal control boxes are used in vehicle environments and are signal-type wall boxes installed on the vehicle wall. They mainly realize the signal interconnection between wired channel equipment inside the vehicle and other node communication equipment outside the vehicle. In the existing technology, because one side of the vehicle-mounted signal transfer box is located inside the vehicle compartment and the other side is located outside the vehicle compartment, the signal interconnection effect is poor due to outdoor electromagnetic interference when interconnecting signals between the inside and outside of the vehicle. Utility Model Content

[0003] The main purpose of this invention is to propose a control box with an electromagnetic shielding structure, which aims to avoid the problem of unstable signal transmission caused by electromagnetic leakage in control boxes used in vehicle environments.

[0004] To achieve the above objectives, this utility model proposes a control box with an electromagnetic shielding structure. The control box is used to transfer signals from outside the cabin to inside the cabin. The control box comprises:

[0005] A connecting plate, which is used to be attached to and fixed to the outer side of the bulkhead of the cabin;

[0006] The outer casing is located on one side of the connecting plate;

[0007] An inner box, located on the other side of the connecting plate, is used to pass through an opening in the bulkhead into the cabin body when the connecting plate is attached and fixed to the outer side of the bulkhead; and

[0008] An electromagnetic shielding component is used to adhere to the bulkhead and is disposed opposite to the connecting plate.

[0009] In one embodiment, the electromagnetic shielding component is a copper mesh or a serrated copper strip.

[0010] In one embodiment, the copper mesh has a mesh count of 120.

[0011] In one embodiment, one side of the electromagnetic shielding member is attached to the side of the connecting plate facing the bulkhead, and the other side of the electromagnetic shielding member is used to be attached to the bulkhead.

[0012] In one embodiment, the electromagnetic shielding member is arranged in a ring shape, and is used to surround the outer periphery of the opening of the bulkhead, and the inner periphery of the electromagnetic shielding member is used to fit against the edge of the opening of the bulkhead.

[0013] In one embodiment, the control box further includes fasteners, which are provided in multiple units and are arranged around the outer periphery of the opening in the bulkhead. The fasteners are used to pass through the connecting plate in a direction from outside the bulkhead to inside the bulkhead and are connected to the bulkhead to fix the control box to the bulkhead.

[0014] In one embodiment, the fastener is configured as a stainless steel screw that extends from the electromagnetic shield to connect with the bulkhead, such that one side of the electromagnetic shield is attached to the connecting plate and the other side is attached to the bulkhead.

[0015] In one embodiment, the inner box includes a box body, a cover plate, and a box body disposed within the box body. The box body has a box opening on the side opposite to the connecting plate, and the cover plate is detachably installed at the box opening.

[0016] In one embodiment, the outer casing and the inner casing are made of metal. The control box further includes a grounding structure, which is electrically connected to the outer casing of the inner casing and the outer casing. The grounding structure is located at the bottom of the inner casing and is used to connect a grounding wire.

[0017] In one embodiment, the grounding structure includes a flange and a grounding bolt disposed on the flange, the grounding bolt being used to connect a grounding wire.

[0018] The technical solution of this utility model is to set up a control box for transferring signals from outside the cabin to inside the cabin. The control box includes a connecting plate, an outer box, and an inner box. The outer box and the inner box are located on opposite sides of the connecting plate. When the connecting plate is attached to and fixed to the outer side of the cabin wall, the outer box is installed through an opening in the cabin wall into the cabin. An electromagnetic shielding component that can be positioned opposite the connecting plate is attached to the cabin wall to prevent electromagnetic leakage at the connection point between the connecting plate and the cabin wall when the connecting plate is tightly installed, which would interfere with the signal transmission between the outer box and the inner box. This improves the transmission stability of the signal transfer by the control box. 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 description of the embodiments or the prior art 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 the structures shown in these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the installation of the control box with electromagnetic shielding structure provided by this utility model on the bulkhead;

[0021] Figure 2 A schematic diagram of an embodiment of the control box with electromagnetic shielding structure provided by this utility model;

[0022] Figure 3 for Figure 2 A schematic diagram of a control box with electromagnetic shielding structure at one angle;

[0023] Figure 4 for Figure 2 Another structural diagram of the control box with electromagnetic shielding structure;

[0024] Figure 5 for Figure 2 Another angle structural diagram of the control box with electromagnetic shielding structure;

[0025] Figure 6 for Figure 2 A schematic diagram of the control box with electromagnetic shielding structure from another angle.

[0026] Explanation of icon numbers:

[0027] 100. Control box; 10. Connecting plate; 20. Outer box; 30. Inner box; 31. Box body; 32. Cover plate; 40. Electromagnetic shielding component; 50. Fastener; 60. Grounding structure; 200. Bulkhead; 201. Opening.

[0028] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] 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 scope of protection of the present utility model.

[0030] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0031] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0032] The vehicle-mounted signal control box 100 is used in vehicle environments and is a signal-type wall box installed on the vehicle wall. It primarily enables signal interconnection between wired channel equipment inside the vehicle and other communication devices outside the vehicle. In existing technologies, because one side of the vehicle-mounted signal transfer box is located inside the vehicle cabin and the other side is located outside, poor signal interconnection performance can occur due to outdoor electromagnetic interference when interconnecting signals between the inside and outside of the vehicle.

[0033] This utility model proposes a control box 100 with an electromagnetic shielding structure, which is used to transfer signals from outside the cabin to inside the cabin.

[0034] Please see Figures 1 to 6 In one embodiment of this utility model, the control box 100 with an electromagnetic shielding structure includes a connecting plate 10, an outer box 20, and an inner box 30. The connecting plate 10 is used to be attached to and fixed to the outer side of the cabin wall 200. The outer box 20 is disposed on one side of the connecting plate 10, and the inner box 30 is disposed on the other side of the connecting plate 10. When the connecting plate 10 is attached to and fixed to the outer side of the cabin wall 200, the outer box 20 is used to pass through the opening 201 of the cabin wall 200 into the cabin body. The electromagnetic shielding member 40 is used to be attached to the cabin wall 200 and is disposed opposite to the connecting plate 10.

[0035] In this invention, the control box 100 is connected and fixed to the cabin body by installation from the outside to the inside. The two opposite sides of the connecting plate 10 can respectively install the outer box 20 and the inner box 30. The inner box 30 passes through the opening 201 of the cabin wall 200 into the cabin body. The mounting plate fits against the cabin wall around the opening 201 and is fixed to the cabin wall 200 by screws or other fasteners 50, thus realizing the installation of the control box 100 to the cabin body. The inner box 30 and the outer box 20 can each be equipped with multiple sets of communication interfaces. For example, the outer box 20 can be equipped with a Beidou interface, a camera interface, a perimeter antenna control interface, and a shortwave transmission interface. The inner box 30 can also be equipped with structures corresponding to the interfaces of the outer box 20. Corresponding circuit conversion structures are set in the inner box 30 and the outer box 20, respectively connected to the external and internal interfaces. When the corresponding interface is connected outside the cabin, the corresponding signal can be transmitted to the cabin body after conversion by the corresponding circuit. When the corresponding interface is connected inside the cabin, signal transfer from outside to inside the cabin can be realized.

[0036] It is understandable that, since the connecting plate 10 needs to be connected and fixed to the cabin using corresponding fasteners 50, electromagnetic leakage may occur at the connection point between the connecting plate 10 and the bulkhead 200. When transmitting signals from outside the cabin to inside, electromagnetic pulses may interfere with signal transmission, affecting normal signal transmission. Therefore, an electromagnetic shielding component 40 is installed on the bulkhead 200, positioned opposite the connecting plate 10, covering the connection point between the connecting plate 10 and the bulkhead 200. When electromagnetic leakage occurs at the connection point, electromagnetic waves can be emitted through the electromagnetic shielding component 40 to achieve electromagnetic shielding, preventing interference from electromagnetic radiation during signal transmission. The electromagnetic shielding component 40 can be a metallic material, such as copper, aluminum, or silver; a conductive fabric, such as silver-plated fiber or carbon fiber blended fabric; or a radiation-shielding material, such as conductive coatings containing nickel or graphene. No specific limitations are imposed here.

[0037] The technical solution of this utility model is to set up a control box 100 for transferring signals from outside the cabin to inside the cabin. The control box 100 includes a connecting plate 10, an outer box 20, and an inner box 30. The outer box 20 and the inner box 30 are respectively located on opposite sides of the connecting plate 10. When the connecting plate 10 is attached and fixed to the outer side of the cabin wall 200, the outer box 20 is used to pass through the opening 201 of the cabin wall 200 to the cabin for installation. An electromagnetic shielding component 40 is attached to the cabin wall 200 and can be positioned opposite to the connecting plate 10. This prevents electromagnetic leakage at the connection point between the connecting plate 10 and the cabin wall 200 when the connecting plate 10 is tightly installed, which would interfere with the signal transmission between the outer box 20 and the inner box 30. This improves the transmission stability of the signal transfer of the control box 100.

[0038] like Figure 3As shown, in one embodiment, one side of the electromagnetic shielding member 40 is attached to the side of the connecting plate 10 facing the bulkhead 200, and the other side of the electromagnetic shielding member 40 is used to attach to the bulkhead 200.

[0039] In this way, the electromagnetic shielding component 40 can fill the contact gap between the connecting plate 10 and the bulkhead 200. When the electromagnetic shielding component 40 is a copper mesh or a serrated copper strip, its flexibility can ensure that the electromagnetic shielding component 40 effectively fills the contact gap between the connecting plate 10 and the bulkhead 200, thus ensuring the electromagnetic shielding effect.

[0040] Optionally, the electromagnetic shielding component 40 is a copper mesh or a serrated copper strip.

[0041] Understandably, copper mesh and serrated copper strips are flexible and can fit tightly against the irregular surfaces of the wall box and the vehicle compartment, reducing electromagnetic leakage by filling the gaps between the connecting plate 10 and the bulkhead 200. They are particularly suitable for uneven interfaces when installing vehicle-mounted equipment. Compared to rigid structures such as metal plates, their flexibility better adapts to the interface sealing requirements under vibration environments. Furthermore, the weight of copper mesh and serrated copper strips is much lower than that of solid metal shielding layers, reducing the overall load on vehicle-mounted equipment. Their thinness also means they do not occupy additional installation space, making them suitable for electromagnetic protection of compact structures such as wall boxes.

[0042] Optionally, the copper mesh has a mesh count of 120.

[0043] Understandably, 120-mesh copper mesh, with 120 openings per inch, has a moderate mesh density and can effectively block electromagnetic waves in the 100kHz–10GHz frequency range, meeting the protection requirements of automotive equipment against radio frequency interference (such as shortwave and BeiDou signal bands), achieving a shielding effectiveness of no less than 60dB. Compared to lower mesh count copper mesh, its finer mesh reduces the penetration of high-frequency electromagnetic waves, while higher mesh count copper mesh offers stronger shielding but is more expensive.

[0044] like Figure 3 As shown, in one embodiment, the electromagnetic shielding member 40 is arranged in a ring shape. The electromagnetic shielding member 40 is used to surround the outer periphery of the opening 201 of the bulkhead 200, and the inner periphery of the electromagnetic shielding member 40 is used to fit against the edge of the opening 201 of the bulkhead 200.

[0045] This configuration allows the annular electromagnetic shielding component 40 to cover the outer perimeter of the opening 201 of the bulkhead 200 without any blind spots, avoiding the leakage problem caused by gaps in traditional strip or partial laying. This ensures that electromagnetic waves form a complete shielding barrier around the opening, further enhancing the electromagnetic shielding effect. In addition, the annular electromagnetic shielding component 40 itself has a certain shape memory, which simplifies the installation and positioning steps. It can also form an annular fixation with the stainless steel screws mentioned later, enhancing the connection rigidity between the connecting plate 10 and the bulkhead 200.

[0046] like Figure 3 , Figure 4 As shown, in one embodiment, the control box 100 further includes fasteners 50. Multiple fasteners 50 are provided and are arranged around the outer periphery of the opening 201 of the bulkhead 200. The fasteners 50 are used to pass through the connecting plate 10 in the direction from outside the bulkhead to inside the bulkhead and are connected to the bulkhead 200 to fix the control box 100 to the bulkhead 200.

[0047] Understandably, the ring-shaped spacing of multiple fasteners 50 disperses the contact pressure between the connecting plate 10 and the bulkhead 200 across the entire perimeter, preventing localized stress concentration and thus enhancing the vibration and impact resistance of the control box 100. Furthermore, when the fasteners 50 secure the connecting plate 10 to the bulkhead 200 along the direction from the outside to the inside of the compartment, the contact area between the connecting plate 10 and the electromagnetic shielding component 40 compresses the electromagnetic shielding component 40, filling the gap between the connecting plate 10 and the bulkhead 200 and improving the waterproof and dustproof performance at the connection between the control box 100 and the bulkhead 200.

[0048] Optionally, the fastener 50 is configured as a stainless steel screw that extends from the electromagnetic shield 40 to connect with the bulkhead 200, so that one side of the electromagnetic shield 40 is attached to the connecting plate 10 and the other side is attached to the bulkhead 200.

[0049] It is understandable that stainless steel screws, as metal connectors, have electromagnetic shielding function. When multiple stainless steel screws pass through the electromagnetic shielding component 40 and connect with the bulkhead 200, the multiple stainless steel screws arranged in a ring can contact the electromagnetic shielding component 40. The two work together to form a stronger electromagnetic shielding structure.

[0050] like Figure 3 As shown, in one embodiment, the inner box 30 includes a box body 31, a cover plate 32, and a box body disposed inside the box body 31. The box body 31 has a box opening on the side opposite to the connecting plate 10, and the cover plate 32 is detachably installed at the box opening.

[0051] The box body 31 and cover plate 32 can be the outer shell structure of the inner box 30. The outer shell structure of the inner box 30 can be made of metal. The box body can be the signal conversion module of the control box 100. The box body can extend from the outer shell of the inner box 30 into the outer shell of the outer box 20. When a box opening is provided on the side of the box body 31 away from the connecting plate 10, and the cover plate 32 is detachably installed at the box opening, the operator can open the box body 31 from inside the vehicle cabin to inspect and maintain the box body inside the box body 31. This facilitates the operator's inspection and maintenance of the control box 100.

[0052] like Figure 3 , Figure 5 As shown, the outer casing of the outer box 20 and the inner box 30 are made of metal. The control box 100 also includes a grounding structure 60, which is electrically connected to the outer casing of the inner box 30 and the outer box 20. The grounding structure 60 is located at the bottom of the inner box 30 and is used to connect a grounding wire.

[0053] It is understandable that when both the outer casing 20 and the inner casing 30 are made of metal, electromagnetic shielding can be achieved for the components inside the outer casing 20 and the components inside the inner casing 30, respectively. Simultaneously, since a grounding structure 60 is installed at the bottom of the inner casing 30, when the grounding structure 60 is electrically connected to the outer casings of both the inner casing 30 and the outer casing 20, the grounding structure 60, the inner casing 30, and the outer casing 20 are at the same potential, and their potentials relative to ground are essentially equal. With the electromagnetic shielding component 40 installed between the outer casing 20 and the inner casing 30, stray currents and electromagnetic coupling between internal components can be reduced, electromagnetic interference can be lowered, signal transmission stability can be further ensured, and the overall electromagnetic shielding performance of the control box 100 can be improved. At the same time, the potential difference between the control box 100 casing and the grounding system can be eliminated, preventing the risk of electric shock during faults or lightning strikes. It also avoids safety hazards such as arcs and sparks caused by potential differences, and can quickly discharge overcurrents generated by lightning surges, preventing the formation of discharge channels between different components due to potential differences, and protecting internal electronic components from impact damage.

[0054] like Figure 3 , Figure 5 As shown, in one embodiment, the grounding structure 60 includes a flange and a grounding bolt disposed on the flange, the grounding bolt being used to connect a grounding wire. The flange can be a square flange, which connects and fixes the grounding bolt to the outer shell of the inner casing 30. The grounding bolt may have a pre-installed grounding bolt structure. The grounding wire is connected to the grounding bolt interface. At the bolt interface, the grounding wire is tightened using a tool to connect the grounding wire to the grounding bolt.

[0055] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A control box with an electromagnetic shielding structure, the control box being used to transfer signals from outside the cabin to the inside of the cabin, characterized in that, The control box includes: A connecting plate, which is used to be attached to and fixed to the outer side of the bulkhead of the cabin; The outer casing is located on one side of the connecting plate; An inner box, located on the other side of the connecting plate, is used to pass through an opening in the bulkhead into the cabin body when the connecting plate is attached and fixed to the outer side of the bulkhead; and An electromagnetic shielding component is used to adhere to the bulkhead and is disposed opposite to the connecting plate.

2. The control box with an electromagnetic shielding structure as described in claim 1, characterized in that, One side of the electromagnetic shielding component is attached to the side of the connecting plate facing the bulkhead, and the other side of the electromagnetic shielding component is used to be attached to the bulkhead.

3. The control box with an electromagnetic shielding structure as described in claim 2, characterized in that, The electromagnetic shielding component is a copper mesh or a serrated copper strip.

4. The control box with an electromagnetic shielding structure as described in claim 3, characterized in that, The copper mesh has a mesh count of 120.

5. The control box with an electromagnetic shielding structure as described in claim 2, characterized in that, The electromagnetic shielding component is arranged in a ring shape, and is used to surround the outer periphery of the opening in the bulkhead, while the inner periphery of the electromagnetic shielding component is used to fit against the edge of the opening in the bulkhead.

6. The control box with an electromagnetic shielding structure as described in claim 1, characterized in that, The control box also includes fasteners, and there are multiple fasteners. The multiple fasteners are used to surround the outer periphery of the opening in the bulkhead. The fasteners are used to pass through the connecting plate in the direction from outside the bulkhead to inside the bulkhead and connect with the bulkhead to fix the control box to the bulkhead.

7. The control box with an electromagnetic shielding structure as described in claim 6, characterized in that, The fastener is configured as a stainless steel screw, which protrudes from the electromagnetic shield to connect with the bulkhead, so that one side of the electromagnetic shield is attached to the connecting plate and the other side is attached to the bulkhead.

8. The control box with an electromagnetic shielding structure as described in claim 1, characterized in that, The inner box includes a box body, a cover plate, and a box body disposed inside the box body. The box body has a box opening on the side opposite to the connecting plate, and the cover plate is detachably installed at the box opening.

9. The control box with an electromagnetic shielding structure as described in claim 1, characterized in that, The outer casing and the inner casing are made of metal. The control box also includes a grounding structure, which is electrically connected to the outer casing of the inner casing and the outer casing. The grounding structure is located at the bottom of the inner casing and is used to connect a grounding wire.

10. The control box with an electromagnetic shielding structure as described in claim 9, characterized in that, The grounding structure includes a flange and a grounding bolt disposed on the flange, the grounding bolt being used to connect a grounding wire.

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