A control box structure suitable for complex environments

Abstract

The utility model relates to operation equipment technical field, concretely relates to a control box structure suitable for complex environment, including box, backboard, back light panel and control PCB board, backboard and back light panel symmetry set in the opposite sides of box, and with box common definition is used to accommodate core part's sealed cavity, control PCB board sets up in sealed cavity, back light panel includes mounting plate, light source, illumination control panel and pressboard, the utility model discloses through the cooperation of box, backboard and back light panel and multiple sealing structure of setting in the key interface, has realized to internal control PCB board's high -grade waterproof, dustproof effect, through the integration light source in back light panel, and constructs different back light panel structure to different control device, has realized clear, uniform and low energy consumption's back light illumination effect, to ensure that the reliability of accurate operation of operating personnel under the condition of faint light or no light.

Description

Technical Field

[0001] This utility model relates to the field of operating equipment technology, specifically to a control box structure suitable for complex environments, and in particular to an operating control box structure that integrates multiple protection and display functions such as electromagnetic shielding, waterproofing, corrosion resistance, and backlighting. Background Technology

[0002] To improve equipment operating efficiency and simplify operating procedures, various control switches, buttons, indicator lights, and other operating and display elements of the equipment are usually integrated into a single panel or box to form an operating control box.

[0003] With the widespread application of modern technology in various fields, many devices, especially outdoor equipment, mobile equipment, or equipment deployed in special industrial or military fields, often need to face harsh and complex operating environments for their control boxes. These environments may not only include harsh natural conditions such as high humidity, high salinity, and extreme temperature changes, but may also be accompanied by strong electromagnetic interference.

[0004] Therefore, some special operation control boxes are used in harsh environments, often in high humidity and high salinity natural environments, and the surrounding electromagnetic environment is also relatively complex. Moreover, the equipment must be ready to operate 24 hours a day. Therefore, the operation control box panel needs to ensure that operators can accurately control the instrument equipment through the operation control box in low light or no light environment. The operation control box also needs to have good waterproof, corrosion-proof and electromagnetic interference prevention capabilities.

[0005] Currently, many control boxes for complex environments are being developed, with diverse structures. Some achieve excellent results in single functions, but their overall performance is not satisfactory. For example, some control panels use electroluminescence as the backlight panel, but this consumes a lot of energy, has insufficient brightness, and the electroluminescence gradually decreases over time. Voltage, frequency, temperature, and humidity all affect the lifespan of the cold light, and high-voltage power supply leads to poor safety and also affects the electromagnetic shielding effect of the control box. Some use the uniform light effect of acrylic organic glass for backlighting, but acrylic material is prone to deformation and cracking when subjected to impacts or extreme temperatures, has poor sealing, and the coating is prone to peeling off, resulting in uneven backlighting or light leakage. When drilling holes in the middle, shadows are formed behind the holes, resulting in poor backlight uniformity. Utility Model Content

[0006] To address the aforementioned problems, this invention provides a control box structure suitable for complex environments, integrating comprehensive performance such as electromagnetic shielding, waterproofing, salt spray corrosion resistance, and backlighting.

[0007] This utility model is achieved through the following technical solution:

[0008] A control box structure suitable for complex environments, comprising:

[0009] Box;

[0010] Back panel;

[0011] A backlight panel, the back plate and the backlight panel are symmetrically arranged on opposite sides of the housing, and together with the housing, define a sealed cavity for accommodating the core component;

[0012] A control PCB board is disposed within the sealed cavity and fixed to the inner side of the back plate;

[0013] The backplane is provided with at least one aviation plug mounting interface and is connected to at least one aviation plug that is electrically connected to the control PCB board.

[0014] The backlight panel includes a mounting plate, a light source, an illumination control board, and a pressure plate. The light source is disposed on the illumination control board, and the illumination control board is fixed on the mounting plate by the pressure plate. An operating device electrically connected to the control PCB board is connected to the mounting plate, and the operating part of the operating device and the illumination direction of the light source are both facing the outside of the backlight panel.

[0015] Optionally, the inner side of the back plate is provided with a mounting post for mounting the control PCB board, and the control PCB board is fixed to the mounting post by screws;

[0016] The aircraft insert is fixed to the inner side of the back plate by screws, and a conductive pad is provided on the mating interface between the aircraft insert and the back plate.

[0017] Optionally, the back panel has a raised annular step on its contact surface with the housing. The annular step is recessed into the inner cavity of the housing when the back panel is assembled with the housing. Conductive adhesive strips are provided between the contact surfaces of the back panel and the housing, and between the contact surfaces of the backlight panel and the housing.

[0018] Optionally, the lighting control board is a multilayer PCB board, with circuit traces laid in the middle layer of the multilayer PCB board, copper film laid in the edge layer of the multilayer PCB board, and tin film conductively connected to the copper film on the periphery of the multilayer PCB board.

[0019] The lighting control board is provided with at least one resistor, which is connected in series with the light source and the power supply, and is used to control the brightness of the light source.

[0020] As an optional embodiment, the operating device may be a control switch;

[0021] The backlight panel also includes:

[0022] An optical functional layer is disposed between the lighting control panel and the pressure plate. The pressure plate, the optical functional layer, and the mounting plate are all provided with mounting openings for the control switch to pass through.

[0023] The control switch passes through and is installed in the mounting opening, and a sealing structure is provided between the control switch and the mounting plate, and between the control switch and the optical functional layer.

[0024] Optionally, the optical functional layer includes: a light guide plate and a face film, wherein the surface of the light guide plate is coated with a white light-transmitting material, the face film is attached to the light-emitting surface of the light guide plate and defines the display area of ​​the control switch, and the area of ​​the light guide plate outside the display area is coated with a black light-shielding material;

[0025] The sealing structure between the mounting plate and the control switch adopts an O-ring seal, and the control switch and the light guide plate are sealed together by a compression nut.

[0026] Optionally, a conductive step is formed in the peripheral area of ​​the side surface of the mounting plate facing the lighting control board, the lighting control board and the optical functional layer are accommodated in the area formed by the conductive step, and the peripheral tin film of the lighting control board is electrically connected to the conductive step;

[0027] The pressure plate is fixed to the mounting plate by fasteners and applies pressure to the optical functional layer and the lighting control board to make them adhere to the mounting plate;

[0028] A recessed platform structure is formed in the non-peripheral area of ​​the side surface of the mounting plate facing the lighting control board, and the recessed platform structure defines an insulating gap between the mounting plate and the lighting control board.

[0029] As another optional embodiment, if the operating device is a silicone button, the pressure plate is provided with a plurality of mounting openings for the silicone button to pass through;

[0030] The backlight panel also includes:

[0031] A button pressure plate is used to install and fix the silicone button in the mounting opening. The button pressure plate presses the annular sealing skirt of the silicone button.

[0032] A light shield is disposed between the lighting control panel and the button pressure plate, and is used to prevent light crosstalk.

[0033] Optionally, the bottom of the silicone button is provided with a protrusion for driving the corresponding switch element, and the surface of the silicone button is coated with a black light-shielding layer, on which an indicator mark for light transmission is formed by laser engraving.

[0034] Optionally, the light source is a surface-mount LED chip;

[0035] The outer surfaces of the housing and the back panel are sequentially treated with conductive oxidation and anti-corrosion paint coating.

[0036] The light guide plate is made of aviation plexiglass, and the face film is made of PC material with a frosted outer surface.

[0037] The pressure plate is made of metal and has a sealing groove around its perimeter to cooperate with the sealing strip to enhance the sealing performance.

[0038] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0039] This utility model achieves a high level of waterproof and dustproof effect for the internal control PCB board through the cooperation of the housing, back panel and backlight panel and the multiple sealing structure set at key interfaces; by integrating the light source in the backlight panel and constructing different backlight panel structures for different control devices, a clear, uniform and low-energy backlight illumination effect is achieved, thereby ensuring the reliability of operators to perform accurate operations under low light or no light conditions.

[0040] By employing a multi-layer PCB design with shielding effect on the lighting control board, and combining the conductive connection between the mounting plate and the shielding layer of the lighting control board, the conductive steps between the back plate and the enclosure, and the conductive adhesive strips, an effective overall electromagnetic shielding structure is constructed, thereby enhancing the control box's ability to resist external electromagnetic interference and suppress its own electromagnetic radiation.

[0041] Furthermore, by selecting appropriate materials for the device, the corrosion resistance, impact resistance, and high and low temperature resistance of the control box can be further improved. Attached Figure Description

[0042] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention, and are included in and constitute a part of this specification, but do not constitute a limitation on the embodiments of the present invention.

[0043] Figure 1 This is a structural schematic diagram of a control box structure suitable for complex environments according to the present invention.

[0044] Figure 2This is a structural schematic diagram of the lighting control panel according to the present invention.

[0045] Figure 3 This is a structural schematic diagram of the backlight panel according to the present invention, and the control switch is shown in the figure.

[0046] Figure 4 This is a structural schematic diagram of the backlight panel according to the present invention, showing silicone buttons.

[0047] Reference numerals: 1-Backlight panel, 2-House, 3-Backplate, 4-Control PCB board, 5-Airplane connector, 31-Conductive adhesive strip, 11-Lighting control board, 12-Side layer, 13-Tin film, 14-Light source, 15-Circuit trace, 16-Control switch, 17-Mounting plate, 18-Light guide plate, 19-Face film, 20-Pressure plate, 21-Sealing ring, 22-Pressure cap, 23-Sealing strip, 24-Silicone button, 25-Button pressure plate, 26-Light shield. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this utility model.

[0049] It should also be noted that, for ease of description, only the parts relevant to this utility model are shown in the accompanying drawings.

[0050] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0051] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0052] Where there is no conflict, the embodiments and features of the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0053] Example 1

[0054] The purpose of this embodiment is to provide a control box structure to protect the internal core electronic components (especially the control PCB board 4), and to provide an operating interface with backlighting, such as... Figure 1 A control box structure suitable for complex environments includes: a housing 2, a back panel 3, a backlight panel 1, and a control PCB board 4;

[0055] The back panel 3 and the backlight panel 1 are symmetrically arranged on opposite sides of the housing 2, and together with the housing 2, they define a sealed cavity for accommodating the core components. Symmetrical arrangement usually means that the two main opening ends of the housing 2 are closed respectively, forming a relatively regular box shape.

[0056] The control PCB board 4 is placed in a sealed cavity and fixed to the inner side of the back plate 3. In order to achieve external connection, the back plate 3 is provided with at least one aviation plug 5 mounting interface and is connected to at least one aviation plug 5 that is electrically connected to the control PCB board 4.

[0057] The backlight panel 1 is the interface for user operation and observation. The backlight panel 1 includes a mounting plate 17, a light source 14, an illumination control board 11, and a pressure plate 20. The illumination control board 11 is a circuit board specifically used to control the light source 14. The light source 14 is mounted on the illumination control board 11. The illumination control board 11 is fixed to the mounting plate 17 by the pressure plate 20. An operating device that is electrically connected to the control PCB board 4 is connected to the mounting plate 17. The operating part of the operating device and the illumination direction of the light source 14 are both facing the outside of the backlight panel 1.

[0058] The pressure plate 20 serves to secure and protect the lighting control board 11 and the light source 14. The mounting plate 17 provides a basic mounting platform for these backlight components. The operating device is electrically connected to the control PCB board 4 in the main structure of the control box to transmit operating commands.

[0059] During operation, the user observes the operating devices and their markings illuminated by the light source 14 on the backlight panel 1, and controls the corresponding equipment or system by operating these devices.

[0060] Example 2

[0061] This embodiment refines the control box structure, further improving the control box's protective performance (such as corrosion resistance, waterproofing, and electromagnetic shielding) and the assembly stability of its internal components in complex environments.

[0062] To enhance the control box's corrosion resistance in harsh environments, especially its resistance to chemical erosion such as salt spray, the outer surfaces of the enclosure 2 and the back panel 3 are sequentially treated with conductive oxidation and anti-corrosion paint coating.

[0063] Conductive oxidation treatment: A conductive oxide film with a certain protective capability is formed on the surface of the metal (aluminum alloy back plate 3). The oxide film can not only improve the surface corrosion resistance, but its conductive properties can also optimize electromagnetic shielding.

[0064] Anti-corrosion paint coating: On the basis of the conductive oxide layer, a layer of professional anti-corrosion paint (fluoropolyurethane matte enamel) is sprayed on to provide stronger physical isolation protection and further enhance the resistance to external corrosive media, thereby ensuring that the enclosure 2 and the back panel 3 have good anti-salt spray corrosion function.

[0065] The inner side of the back plate 3 is provided with mounting supports for mounting the control PCB board 4. The control PCB board 4 is fixed to the mounting supports by screws. The screw fixing ensures that the PCB board can maintain its position stability when subjected to vibration or impact, ensuring the reliability of electrical connection.

[0066] The aircraft insert 5 is fixed to the inner side of the backplate 3 with screws, and a conductive rubber pad is provided at the mating interface between the aircraft insert 5 and the backplate 3. The conductive rubber pad is a gasket material that combines conductivity and elasticity. It can achieve a waterproof seal at the installation part of the aircraft insert 5 and the backplate 3 through its elastic compression; and it can also ensure good electrical continuity between the housing of the aircraft insert 5 and the backplate 3, which has undergone conductive oxidation treatment, by utilizing its conductivity.

[0067] The back plate 3 has a raised annular step on its contact surface with the housing 2. When the back plate 3 and the housing 2 are assembled, the annular step is sunk into the inner cavity of the housing 2. The sunken fit can form a labyrinth-like sealed structure, which can effectively prevent electromagnetic waves from radiating outward or intruding inward along the gaps in the joint surface, thereby enhancing the electromagnetic shielding effect.

[0068] Conductive adhesive strips 31 are provided between the contact surfaces of the back panel 3 and the housing 2, and between the contact surfaces of the backlight panel 1 and the housing 2. Similar to the conductive pads at the aviation plug 5, conductive elastic material is laid on the contact surfaces of the back panel 3 and the housing 2. After being pressed, it can fill the tiny gaps, achieve waterproof sealing, and ensure the electrical conductivity between the two metal parts, further enhancing the integrity of electromagnetic shielding.

[0069] The pressure plate 20 is made of metal and has a sealing groove around its perimeter for cooperating with the sealing strip 23 to enhance the sealing performance. Through the cooperation of the sealing strip 23 and the sealing groove, the entire control box structure has a waterproof sealing effect after assembly, and the sealing between the pressure plate 20 and the backlight panel 1 is better.

[0070] like Figure 2As shown, this embodiment also describes the structural configuration of the lighting control board 11. Through the design of the lighting control board 11, the effective driving and control of the light source 14 is realized, while also taking into account the electromagnetic shielding requirements.

[0071] The lighting control board 11 uses a multi-layer PCB board. The middle layer of the multi-layer PCB board is laid out with circuit traces 15 to provide conductive paths for realizing lighting control logic and connecting electronic components.

[0072] Copper films are laid on the edge layers 12 of the multilayer PCB (i.e., the top and bottom layers of the PCB, or the layers closest to the surface). Copper films are usually used as ground or power layers, which helps to achieve signal integrity and electromagnetic shielding.

[0073] To further enhance the electromagnetic shielding effect, a tin film 13 that is conductively connected to the copper film is provided around the perimeter of the multilayer PCB board.

[0074] Electromagnetic shielding principle: When the lighting control board 11 (PCB board) is pressed tightly against the metal components of the control box, the tin film 13 around the lighting control board 11 can form good electrical contact with these metal components. Since the tin film 13 is electrically connected to the internal copper film (usually the grounding layer), the grounding layer of the lighting control board 11 is connected to the entire metal casing of the control box to form an equipotential body. This equipotential body can effectively shield electromagnetic interference, prevent external electromagnetic waves from intruding, and suppress the outward radiation of electromagnetic waves generated by the internal circuitry, thus achieving a good electromagnetic shielding effect.

[0075] The lighting control board 11 is provided with at least one resistor, which is connected in series with the light source 14 and the power supply. The resistor is used to control the brightness of the light source 14. By connecting the resistor in series, the current flowing through the light source 14 can be limited, thereby achieving the purpose of adjusting its brightness.

[0076] The light source 14 is a surface-mount LED, which has the advantages of small size, high efficiency and fast response, making it very suitable as a light source for the backlight panel 1. It can be directly soldered onto the lighting control board 11.

[0077] In addition, the backlight brightness and color of the control box structure can be adjusted by adjusting the resistance and the color of the LEDs. The backlight uniformity and brightness of the control box structure can also be achieved by adjusting the LED arrangement density on the lighting printed circuit board. For example, the number of LEDs can be increased or their arrangement can be optimized in areas that require brighter or more uniform lighting.

[0078] The lighting control panel 11 may also be equipped with indicator lights for controlling the switches 16. These indicator lights are connected to the corresponding control switches 16 via wires. When a switch is operated, the corresponding indicator light will illuminate, providing real-time status feedback to the operator.

[0079] When the control box is powered on, the power supply drives the surface-mount LED beads to emit light through the circuitry on the lighting control board 11, forming a backlight. Operators can clearly see the illuminated panel markings. If a brightness adjustment function is designed (by changing the effective resistance value), the backlight intensity can be adjusted according to the ambient light. When the switch is operated, the corresponding indicator light will illuminate synchronously to confirm the operating status.

[0080] Example 3

[0081] The control device can be either a toggle switch or a push-button type, such as... Figure 3 As shown, this embodiment provides the structure of the backlight panel 1 when the operating device is a control switch 16. The backlight panel 1 also includes an optical functional layer, which is disposed between the lighting control board 11 and the pressure plate 20. The optical functional layer includes a light guide plate 18 and a face film 19.

[0082] The main function of the light guide plate 18 is to guide and homogenize the light from the light source 14 (such as LED beads). In order to achieve good light guiding and homogenization effects, the surface of the light guide plate 18 is coated with white light-transmitting material (white light-transmitting paint). The light guide plate 18 is made of aviation organic glass, which has excellent strength, toughness and high and low temperature performance, and can meet the requirements of use in complex environments.

[0083] The mask 19 is attached to the light-emitting surface (i.e., the side through which light passes) of the light guide plate 18 and defines the display area of ​​the control switch 16. The mask 19 typically has light-transmitting characters, symbols, or patterns corresponding to the switch. Additionally, to prevent light leakage outside the display area, the area of ​​the light guide plate 18 not attached to the mask 19 (i.e., the part outside the display area) is coated with a black light-blocking material (black light-blocking paint) to ensure that light is concentrated and passes through the preset display area. The mask 19 itself is made of PC material (polycarbonate), and its outer surface is frosted. The frosted treatment helps improve the adhesion of coatings (such as patterns and characters) and reduces the risk of coating peeling and light leakage during high and low temperature changes or impacts. It also improves visual effects and prevents glare.

[0084] The pressure plate 20, the optical functional layer, and the mounting plate 17 are all provided with mounting openings for the control switch 16 to pass through. The control switch 16 passes through the mounting opening and is installed in the mounting opening through the pressure cap 22. An O-ring 21 is provided between the pressure cap 22 and the lighting control plate 11.

[0085] A sealing structure is provided between the control switch 16 and the mounting plate 17, and between the control switch 16 and the optical functional layer.

[0086] The sealing structure between the mounting plate 17 and the control switch 16 adopts an O-ring 21. The mounting plate 17 has a countersunk hole designed at the position of the switch to accommodate the O-ring 21. When the switch is installed and tightened, the O-ring deforms to achieve a sealing effect.

[0087] The control switch 16 and the light guide plate 18 are connected by a compression nut for sealing. When the compression nut is tightened, it will compress the sealing element (O-ring seal used at the nut) located between the nut and the light guide plate 18 or between the switch body and the light guide plate 18, thereby achieving a waterproof sealing effect and ensuring that the light guide plate 18 as a whole also has a good waterproof sealing effect.

[0088] Conductive steps are formed on the peripheral area of ​​the side surface of the mounting plate 17 facing the lighting control board 11. The lighting control board 11 and the optical functional layer are accommodated in the area formed by the conductive steps, and the peripheral tin film 13 of the lighting control board 11 is electrically connected to the conductive steps. The shielding layer (peripheral tin film 13) of the lighting control board 11 is reliably connected to the metal mounting plate 17 through the conductive steps around the mounting plate 17, thereby forming a unified ground with the metal shell of the entire control box, which enhances the electromagnetic shielding effectiveness.

[0089] A recessed structure is formed in the non-peripheral area (i.e., the middle part) of the side surface of the mounting plate 17 facing the lighting control board 11. The recessed structure defines an insulation gap between the mounting plate 17 and the lighting control board 11, ensuring that the circuit part of the lighting control board 11 (except for the edge ground) maintains the necessary electrical isolation between itself and the metal mounting plate 17 to prevent short circuits.

[0090] The pressure plate 20 is fixed to the mounting plate 17 by fasteners and applies pressure to the optical functional layer and the lighting control board 11 to make them adhere to the mounting plate 17; this ensures the tight fixation of each layer of components and also helps to achieve effective sealing and electrical contact. At the same time, the pressure plate 20 also protects the internal optical components and circuit boards.

[0091] In addition, the mounting plate 17 is provided with holes for control lines to pass through, so that the signal of the control switch 16 can be transmitted to the lighting control board 11 or the main control PCB board 4.

[0092] Example 4

[0093] The control device can be either a toggle switch or a push-button type, such as... Figure 4 As shown in the figure, this embodiment provides the structure of the backlight panel when the operating device is a silicone button 24.

[0094] If the operating device is a silicone button 24, the pressure plate 20 is provided with multiple mounting holes for the silicone button 24 to pass through. The position and size of the mounting holes correspond to the silicone button 24, allowing the operating part of the silicone button 24 to extend out of the surface of the pressure plate 20 for the user to press.

[0095] The backlight panel 1 also includes a button pressure plate 25 and a light shield 26.

[0096] The silicone button 24 is installed and fixed in the mounting opening via the button pressure plate 25, which presses against the annular sealing skirt of the silicone button 24. The annular sealing skirt is a flexible flange designed for sealing around the base of the silicone button 24. When the button pressure plate 25 is pressed, the annular sealing skirt deforms under pressure and fits tightly against the relevant mating surfaces (such as the inner surface of the button pressure plate 25 and the surface of the mounting plate 17), thereby forming an effective waterproof sealing barrier at the mounting position of the silicone button 24.

[0097] A light shield 26 is positioned between the lighting control panel 11 and the button plate 25 to prevent light crosstalk. On a panel with multiple backlit silicone buttons 24, without light shielding, the light source under one button might illuminate the area of ​​an adjacent button, causing blurred display or misjudgment. The light shield 26 is made of black fiberglass and is primarily used to fill the gap between the lighting control panel 11 and the button plate 25. By physically isolating or absorbing stray light, the light shield 26 ensures that the backlighting of each silicone button 24 is relatively independent and clear.

[0098] The bottom of the silicone button 24 is provided with a protrusion for driving the corresponding switching element. When the button is pressed, the protrusion (contact) can effectively drive the corresponding switching element, such as a tactile switch or a dome switch.

[0099] To achieve clear backlit characters or graphics, the surface of the silicone button 24 is coated with a black light-shielding layer (black light-shielding ink). The black light-shielding layer is laser-engraved to form indicator marks that allow light to pass through. That is, the laser engraving precisely removes the light-shielding layer in specific areas, exposing the light-transmitting silicone substrate or another transparent layer underneath. When the light source 14 under the button is lit, light can pass through these engraved indicator areas to form clear and bright backlit characters or graphics.

[0100] In the description of this specification, the references to terms such as "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0101] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0102] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating the present invention and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications can be made based on the above-described invention, and these changes or modifications still fall within the scope of the present invention.

Claims

1. A control box structure suitable for complex environments, characterized in that, include: Box (2); Back panel (3); The backlight panel (1), the back plate (3) and the backlight panel (1) are symmetrically arranged on opposite sides of the housing (2), and together with the housing (2) define a sealed cavity for accommodating the core component. The control PCB board (4) is set in the sealed cavity and fixed to the inner side of the back plate (3); The backplate (3) is provided with at least one aviation plug (5) mounting interface and is connected to at least one aviation plug (5) electrically connected to the control PCB board (4). The backlight panel (1) includes a mounting plate (17), a light source (14), an illumination control board (11), and a pressure plate (20). The light source (14) is disposed on the illumination control board (11). The illumination control board (11) is fixed on the mounting plate (17) by the pressure plate (20). An operating device electrically connected to the control PCB board (4) is connected to the mounting plate (17). The operating part of the operating device and the illumination direction of the light source (14) are both facing the outside of the backlight panel (1).

2. The control box structure suitable for complex environments according to claim 1, characterized in that, The inner side of the back plate (3) is provided with a mounting post for mounting the control PCB board (4), and the control PCB board (4) is fixed to the mounting post by screws. The aircraft insert (5) is fixed to the inner side of the back plate (3) by screws, and a conductive pad is provided on the mating interface between the aircraft insert (5) and the back plate (3).

3. The control box structure suitable for complex environments according to claim 1, characterized in that, The back plate (3) has a raised annular step on its contact surface with the housing (2). The annular step is sunk into the inner cavity of the housing (2) when the back plate (3) and the housing (2) are assembled. Conductive adhesive strips (31) are provided between the contact surfaces of the back plate (3) and the housing (2) and between the backlight panel (1) and the housing (2).

4. The control box structure suitable for complex environments according to claim 1, characterized in that, The lighting control board (11) is a multilayer PCB board. The middle layer of the multilayer PCB board is provided with circuit traces (15), the edge layer (12) of the multilayer PCB board is provided with copper film, and the periphery of the multilayer PCB board is provided with tin film (13) that is electrically connected to the copper film. The lighting control board (11) is provided with at least one resistor, which is connected in series with the light source (14) and the power supply. The resistor is used to control the brightness of the light source (14).

5. A control box structure suitable for complex environments according to claim 4, characterized in that, If the operating device is a control switch (16); The backlight panel (1) also includes: An optical functional layer is disposed between the lighting control panel (11) and the pressure plate (20). The pressure plate (20), the optical functional layer and the mounting plate (17) are all provided with mounting openings for the control switch (16) to pass through. The control switch (16) passes through and is installed in the mounting opening, and a sealing structure is provided between the control switch (16) and the mounting plate (17) and between the control switch (16) and the optical functional layer.

6. A control box structure suitable for complex environments according to claim 5, characterized in that, The optical functional layer includes a light guide plate (18) and a face film (19). The surface of the light guide plate (18) is coated with a white light-transmitting material. The face film (19) is attached to the light-emitting surface of the light guide plate (18) and defines the display area of ​​the control switch (16). The area of ​​the light guide plate (18) outside the display area is coated with a black light-shielding material. The sealing structure between the mounting plate (17) and the control switch (16) adopts an O-ring (21), and the control switch (16) and the light guide plate (18) are sealed together by a compression nut.

7. A control box structure suitable for complex environments according to claim 5, characterized in that, The mounting plate (17) has a conductive step formed on the peripheral area of ​​the side surface facing the lighting control plate (11). The lighting control plate (11) and the optical functional layer are accommodated in the area formed by the conductive step, and the peripheral tin film (13) of the lighting control plate (11) is electrically connected to the conductive step. The pressure plate (20) is fixed to the mounting plate (17) by fasteners and applies pressure to the optical functional layer and the lighting control plate (11) to make them adhere to the mounting plate (17); The mounting plate (17) has a recessed structure formed on the non-peripheral area of ​​one side surface facing the lighting control plate (11), and the recessed structure defines an insulating gap between the mounting plate (17) and the lighting control plate (11).

8. A control box structure suitable for complex environments according to claim 4, characterized in that, If the operating device is a silicone button (24); the pressure plate (20) is provided with a plurality of mounting openings for the silicone button (24) to pass through; The backlight panel (1) also includes: The button pressure plate (25) is used to install and fix the silicone button (24) in the mounting opening. The button pressure plate (25) presses the annular sealing skirt of the silicone button (24). A light shield (26) is disposed between the lighting control panel (11) and the button plate (25) and is used to prevent light crosstalk.

9. A control box structure suitable for complex environments according to claim 8, characterized in that, The bottom of the silicone button (24) is provided with a protrusion for driving the corresponding switch element. The surface of the silicone button (24) is coated with a black light-shielding layer, and the black light-shielding layer is laser-engraved to form an indicator that allows light to pass through.

10. A control box structure suitable for complex environments according to claim 6, characterized in that, The light source (14) is a surface-mount LED bead; The outer surfaces of the box body (2) and the back plate (3) are sequentially subjected to conductive oxidation treatment and anti-corrosion paint coating treatment; The light guide plate (18) is made of aviation plexiglass, and the face film (19) is made of PC material with a frosted outer surface; The pressure plate (20) is made of metal and has a sealing groove around its periphery for fitting the sealing strip (23) to enhance the sealing performance.

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