A sealing structure for printed boards

Abstract

The utility model relates to microwave electronic equipment technical field discloses a kind of sealing structure for printed board, including shell and mounting assembly, shell is used to install on the mounting structure of microwave equipment, shell has the cavity for accommodating printed board, and the through hole for being communicated with cavity is formed on shell, the through hole is used to supply the cable that is electrically connected with printed board to wear out, mounting assembly is set on shell, to be used for installing printed board in cavity. Since printed board can be installed in shell by mounting assembly, cable on printed board can wear out from the through hole on shell and connect with external circuit. In this way, printed board exposed to the outside can be in a sealed environment, which can prevent printed board from temperature rise, short circuit or leakage due to dust accumulation and moisture absorption, and improve the working stability and life of electronic components. By setting the mounting assembly, it can prevent the printed board from sliding down and causing poor contact between the printed board and the cable below the printed board.

Description

Technical Field

[0001] This disclosure relates to the field of microwave electronic equipment technology, and more specifically, to a sealing structure for printed circuit boards. Background Technology

[0002] In modern microwave equipment such as communications, radar, satellites, and 5G base stations, printed circuit boards (PCBs) are core components for high-frequency signal processing, power amplification, and data transmission. Their operational stability directly affects the performance of the entire system. Since microwave equipment typically operates in complex electromagnetic environments and under variable physical conditions (such as temperature fluctuations, mechanical vibrations, and humid salt spray), PCBs not only need excellent electrical characteristics but also require reliable structural design to achieve good mechanical support, electromagnetic shielding, and environmental protection.

[0003] Currently, common printed circuit board (PCB) mounting methods mostly use a metal housing with screws for fixing, or the PCB is directly fixed to the equipment base. However, these traditional structures have the following shortcomings in practical applications: (1) Insufficient sealing performance. Most existing packaging structures lack effective static sealing design. In humid, dusty, or corrosive environments, external contaminants can easily penetrate the internal cavity through the gaps in the housing. Dust accumulation may lead to leakage channels on the surface of the PCB, causing short circuits or signal interference; moisture entry may cause solder joint oxidation, increased dielectric loss, and even impedance mismatch in high-frequency circuits, seriously affecting the integrity and transmission efficiency of microwave signals. Especially in equipment deployed outdoors or in industrial sites, insufficient waterproof and dustproof capabilities have become a key bottleneck affecting long-term reliability. (2) Difficulty in ensuring installation accuracy. Microwave circuits are highly sensitive to component layout, trace length, and spatial position, requiring the PCB to maintain precise alignment with other functional modules (such as power supply structures, filters, shielding covers, etc.). However, traditional rigid fixing methods cannot fine-tune the position of the PCB. Deviations caused by processing tolerances or thermal deformation during assembly are difficult to compensate for, which can easily lead to problems such as stress concentration, poor contact, or abnormal electromagnetic coupling. (3) Maintenance and replacement are inconvenient. Some sealing structures are made of integral welding or non-removable cover plates, which means that the outer shell must be destroyed when the printed circuit board is repaired, which greatly increases maintenance costs and downtime.

[0004] In summary, existing mounting structures for printed circuit boards (PCBs) used in microwave equipment generally suffer from poor sealing, weak adjustability, and difficult maintenance, making it difficult to meet the comprehensive requirements of high reliability, high precision, and high maintainability for high-frequency electronic systems. Therefore, there is an urgent need to develop a PCB sealing structure that integrates excellent sealing, precise position adjustment, and convenient assembly / disassembly to improve the overall performance and engineering applicability of microwave equipment. Utility Model Content

[0005] The purpose of this disclosure is to provide a sealing structure for printed circuit boards to solve the technical problems existing in the related art.

[0006] To achieve the above objectives, this disclosure provides a sealing structure for a printed circuit board, including a housing and a mounting assembly; The housing is used for mounting on a microwave device mounting structure, and the housing has a cavity for accommodating a printed circuit board; The housing has a through hole that communicates with the cavity, and the through hole is used for cables that are electrically connected to the printed circuit board to pass through. The mounting assembly is disposed on the housing for mounting the printed circuit board into the cavity.

[0007] Optionally, the mounting assembly includes connectors and adjusters; The housing is provided with an installation channel, which communicates with the cavity. One end of the connector is movably extended from the installation channel in a vertical direction to connect with the printed circuit board. The adjusting member is installed on the mounting channel and is used to adjust the position of the connector in the vertical direction within the mounting channel, so as to adjust the position of the printed circuit board relative to the housing.

[0008] Optionally, two adjusting members are provided, each of which includes a mounting sleeve, an adjusting rod, and an elastic element; Each of the mounting sleeves is disposed on the top of the housing, each of the mounting sleeves forms the mounting channel, and the two mounting sleeves are respectively located at two opposite sides of the housing; The connector includes two first rod segments, an intermediate rod segment, and two limiting nuts. The two first rod segments are respectively connected to both ends of the intermediate rod segment and extend in the same direction. Each first rod segment is used to pass through the corresponding mounting sleeve. The bolt rod of each of the first segments is used sequentially to pass through the mounting channel and the printed circuit board to connect with the limiting nut; The first rod segment has multiple through holes, which are spaced apart along the vertical direction of the first rod segment. Each of the mounting sleeves has a through hole, and the adjusting member is movably inserted through the through hole so as to be inserted into or disengaged from the through hole located below the through hole. The end of the adjusting member away from the first rod segment protrudes outward from the mounting sleeve and forms an operating part.

[0009] Optionally, the adjusting rod includes a rod body and a protrusion that protrudes radially outward from the rod body. The elastic element is located inside the through hole and sleeved on the rod body. The first end of the elastic element is connected to the protrusion, and the second end of the second elastic element is connected to the inner wall of the through hole.

[0010] Optionally, the sealing structure further includes at least one mounting member, through which the housing is detachably connected to the mounting structure; The mounting component includes a connecting screw and a connecting nut. The first end of the connecting screw is connected to the bottom surface of the housing, and the second end of the connecting screw is used to pass through the mounting structure to connect with the connecting nut.

[0011] Optionally, the shell is constructed as a cuboid and made of a transparent material.

[0012] Optionally, the housing includes a housing body and a cover plate, and the sealing structure further includes a sealing ring; The cover plate is sealed to the opening of the housing body by the sealing ring, so as to define the cavity together with the housing body. The housing body is provided with an annular groove around the opening, and the sealing ring is embedded in the annular groove to seal the gap between the housing body and the cover plate.

[0013] Through the above technical solution, the printed circuit board (PCB) can be mounted inside the housing using mounting components. Cables on the PCB can pass through cable routing holes in the housing and connect to external circuits. This design keeps the exposed PCB in a sealed environment, preventing overheating, short circuits, or leakage caused by dust and moisture accumulation. This improves the operational stability and lifespan of electronic components. In other words, there's no need to shut down the power to clean the PCB, extending its lifespan and enhancing the reliability and stability of the equipment. Furthermore, the mounting components prevent the PCB from sliding down and causing poor contact between the PCB and the cables underneath, thus maintaining the stability of the PCB's electrical connections.

[0014] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of a sealing structure for a printed circuit board provided in an exemplary embodiment of this disclosure from a first perspective. Figure 2This is a schematic diagram of a sealing structure for a printed circuit board provided in an exemplary embodiment of this disclosure from a second perspective. Figure 3 This is a cross-sectional view of a sealing structure for a printed circuit board provided in an exemplary embodiment of this disclosure; Figure 4 This is a cross-sectional schematic diagram of the connection between the first rod segment and the adjusting member of a sealing structure for a printed circuit board provided in an exemplary embodiment of this disclosure.

[0016] Explanation of reference numerals in the attached figures 10. Housing; 11. Cavity; 12. Through hole; 13. Housing body; 14. Cover plate; 20. Mounting assembly; 21. Connector; 211. First rod segment; 2111. Through hole; 212. Intermediate rod segment; 213. Limit nut; 22. Adjusting component; 221. Mounting sleeve; 2211. Mounting channel; 2212. Through hole; 222. Adjusting rod; 2221. Rod body; 2222. Protrusion; 223. Elastic component; 23. Operating part; 30. Printed circuit board; 40. Mounting structure; 50. Mounting component; 51. Connecting screw; 52. Connecting nut; 60. Sealing ring. Detailed Implementation

[0017] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0018] In the description of this disclosure, it should be understood that the terms "upper," "lower," "left," "right," "top," "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation, and therefore should not be construed as a limitation of this disclosure. For example, see [link to relevant documentation]. Figure 1 , Figure 1 The area above the plane of the image is considered "above". Figure 1 The direction above in the drawing is "below," and "inside" and "outside" refer to the inside and outside of the corresponding structural outline. Furthermore, terms such as "first" and "second" are used only for descriptive distinction and should not be interpreted as indicating or implying relative importance.

[0019] In the description of this disclosure, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "connect," "link," and "install" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0020] like Figures 1 to 4 As shown, this disclosure provides a sealing structure for a printed circuit board, including a housing 10 and a mounting assembly 20. The housing 10 is used to mount on a mounting structure 40 of a microwave device. The housing 10 has a cavity 11 for accommodating a printed circuit board 30. A wire through hole 12 communicating with the cavity 11 is formed on the housing 10. The wire through hole 12 is used for cables electrically connected to the printed circuit board 30 to pass through. The mounting assembly 20 is disposed on the housing 10 for mounting the printed circuit board 30 in the cavity 11.

[0021] Through the above technical solution, since the printed circuit board 30 can be installed inside the housing 10 via the mounting component 20, the cables on the printed circuit board 30 can pass through the cable holes 12 on the housing 10 and connect to the external circuit. This arrangement allows the exposed printed circuit board 30 to be in a sealed environment 60, preventing overheating, short circuits, or leakage caused by dust and moisture accumulation, thus improving the operational stability and lifespan of electronic components. In other words, there is no need to power off the printed circuit board 30 for cleaning, which helps extend its service life and enhances the reliability and stability of equipment operation. Furthermore, the mounting component 20 prevents the printed circuit board 30 from sliding down and causing poor contact between the printed circuit board 30 and the cables below it, thus maintaining the stability of the electrical connection of the printed circuit board 30.

[0022] As one implementation method, such as Figures 1 to 4 As shown, the mounting assembly 20 includes a connector 21 and an adjusting member 22. The housing 10 is provided with a mounting channel 2211, which communicates with the cavity 11. One end of the connector 21 is movably extended from the mounting channel 2211 in the vertical direction to connect with the printed circuit board 30. The adjusting member 22 is mounted on the mounting channel 2211 and is used to adjust the position of the connector 21 in the vertical direction within the mounting channel 2211 to adjust the position of the printed circuit board 30 relative to the housing 10.

[0023] The connector 21 passes through the mounting channel 2211 and connects to the printed circuit board 30 (with mounting holes on the printed circuit board 30) within the cavity 11. The adjusting member 22 allows the connector 21 to be locked or unlocked. That is, when the adjusting member 22 is unlocked, the position of the printed circuit board 30 within the cavity 11 can be adjusted by pushing or pulling the connector 21 upwards or downwards. Once the printed circuit board 30 reaches the desired position, the adjusting member 22 can be used to lock the connector 21. This prevents the printed circuit board 30 from shifting due to vibration or other external forces during equipment operation, thereby improving the stability and reliability of the electrical connection.

[0024] As one implementation method, such as Figure 1 and Figure 3 As shown, there are two adjusting members 22. Each adjusting member 22 includes a mounting sleeve 221, an adjusting rod 222, and an elastic member 223. Each mounting sleeve 221 is located on the top of the housing 10 and forms an installation channel 2211. The two mounting sleeves 221 are located on opposite sides of the housing 10. The connecting member 21 includes two first rod segments 211, an intermediate rod segment 212, and two limiting nuts 213. The two first rod segments 211 are respectively connected to the two ends of the intermediate rod segment 212 and extend in the same direction. Each first rod segment 211 is used to pass through the corresponding mounting sleeve 221. The bolt rod of segment 211 is used to pass through the mounting channel 2211 and the printed circuit board 30 in sequence to connect with the limiting nut 213. Multiple through holes 2111 are formed on the first rod segment 211. The multiple through holes 2111 are spaced apart along the vertical direction of the first rod segment 211. A through hole 2212 is formed on each mounting sleeve 221. The adjusting member 22 is movably inserted through the through hole 2212 so that it can be inserted into the through hole 2111 below the through hole 2212 or disengaged from the through hole 2111 located below the through hole 2212. The end of the adjusting member 22 away from the first rod segment 211 protrudes outward from the mounting sleeve 221 and forms an operating part 23.

[0025] The mounting sleeve 221 has an internal mounting channel 2211 for the first rod segment 211 to pass through and slide up and down. Furthermore, the side wall of the mounting sleeve 221 has a through hole 2212 (transverse hole) to accommodate the pin portion of the adjusting member 22. In other words, the mounting sleeve 221 serves as a guide, support, and positioning element.

[0026] The adjusting member 22 is movably inserted into the through hole 2212 of the mounting sleeve 221, and can be inserted into or removed from the through hole 2111 on the first rod segment 211, thereby locking or unlocking the position of the connector 21 (i.e. the printed circuit board 30).

[0027] The elastic element 223 is provided on the adjusting rod 222 to provide elastic force, which can make the adjusting rod 222 automatically spring inward into the through hole 2111 of the first rod segment 211, thereby realizing the self-locking function.

[0028] The operating part 23 is the outward protrusion of the adjusting rod 222, which facilitates manual operation.

[0029] In this design, the two first rod segments 211 of the connector 21 pass through the mounting channels 2211 of the corresponding mounting sleeves 221 and enter the housing 10. Each first rod segment 211 has multiple through holes 2111 spaced apart in the vertical direction, used to cooperate with the adjusting rod 222 to achieve multi-level height adjustment. The lower end of the first rod segment 211 is a threaded rod structure, which passes through the mounting hole on the printed circuit board 30 and is threadedly connected to the limiting nut 213, thereby achieving locking and fixation.

[0030] In addition, the two mounting sleeves 221 are located on opposite sides of the housing 10. With this arrangement, the first rod segment 211 is located at the corner of the cavity 11, which can avoid the routing of the printed circuit board 30 cable.

[0031] Specifically, when the position of the printed circuit board 30 needs to be adjusted, the operator can compress the elastic element 223 through the operating part 23 to disengage the adjusting rod 222 from the through hole 2111 of the first rod segment 211. At this time, the connecting piece 21 can move freely up and down within the mounting channel 2211. Then, the operator can push or pull the connecting piece 21 as needed, thereby moving the printed circuit board 30 up and down to the desired position. Once the printed circuit board 30 reaches the desired position, the operating part 23 is released. Under the action of the elastic element 223, the adjusting rod 222 will automatically insert into the corresponding through hole 2111 of the first rod segment 211, completing the locking of the position of the printed circuit board 30. Finally, the connection between the first rod segment 211 and the printed circuit board 30 is further tightened using the limit nut 213 to ensure that the printed circuit board 30 will not shift even in harsh environments such as vibration.

[0032] In other examples, the first rod segment 211 can be connected to the printed circuit board 30 first by the limiting nut 213, and then the position of the printed circuit board 30 can be adjusted by the adjusting member 22.

[0033] As one embodiment of the adjusting rod 222, such as Figure 4 As shown, the adjusting rod 222 includes a rod body 2221 and a protrusion 2222 that protrudes radially outward from the rod body 2221. An elastic element 223 is located inside the through hole 2212 and sleeved on the rod body 2221. The first end of the elastic element 223 is connected to the protrusion 2222, and the second end of the second elastic element 223 is connected to the inner wall of the through hole 2212.

[0034] As one embodiment of the connection between the mounting component 50 and the mounting structure 40, such as Figures 1 to 4 As shown, the sealing structure also includes at least one mounting member 50. The housing 10 is detachably connected to the mounting structure 40 via the mounting member 50. The mounting member 50 includes a connecting screw 51 and a connecting nut 52. The first end of the connecting screw 51 is connected to the bottom surface of the housing 10, and the second end of the connecting screw 51 is used to pass through the mounting structure 40 to connect with the connecting nut 52.

[0035] In one embodiment, the housing 10 is constructed as a cuboid and is made of a transparent material.

[0036] The transparent material allows operators to directly view the working status of the internal printed circuit board 30 and the components on it without opening the equipment casing, facilitating troubleshooting and maintenance.

[0037] As one embodiment of the housing 10, such as Figure 3 As shown, the housing 10 includes a housing body 13 and a cover plate 14. The sealing structure also includes a sealing ring 60. The cover plate 14 is sealed to the opening of the housing body 13 through the sealing ring 60, so as to define the cavity 11 together with the housing body 13. An annular groove is provided on the housing body 13 around the opening. The sealing ring 60 is embedded in the annular groove to seal the gap between the housing body 13 and the cover plate 14.

[0038] Specifically, the sealing ring 60 can be pre-embedded in the annular groove on the housing body 13, and then the cover plate 14 is placed over the opening of the housing body 13. Then, the cover plate 14 can be gradually tightened by fasteners (such as screws) to apply pressure to the housing body 13. Finally, the pressure is transmitted to the sealing ring 60, causing it to undergo elastic compression, thus producing a sealing effect in both the radial and axial directions.

[0039] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0040] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0041] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A sealing structure for printed circuit boards, characterized in that, Includes housing (10) and mounting components (20); The housing (10) is used for mounting on the mounting structure (40) of the microwave equipment, and the housing (10) has a cavity (11) for accommodating the printed circuit board (30). The housing (10) has a wire hole (12) communicating with the cavity (11), and the wire hole (12) is used for cables that are electrically connected to the printed circuit board (30) to pass through. The mounting assembly (20) is disposed on the housing (10) for mounting the printed circuit board (30) into the cavity (11).

2. The sealing structure for printed circuit boards according to claim 1, characterized in that, The mounting assembly (20) includes a connector (21) and an adjusting member (22); The housing (10) is provided with an installation channel (2211), which communicates with the cavity (11). One end of the connector (21) is movably extended from the installation channel (2211) in the vertical direction to connect with the printed circuit board (30). The adjusting member (22) is installed on the mounting channel (2211) and is used to adjust the position of the connector (21) in the vertical direction within the mounting channel (2211) to adjust the position of the printed circuit board (30) relative to the housing (10).

3. The sealing structure for printed circuit boards according to claim 2, characterized in that, Two adjusting members (22) are provided, each of which includes a mounting sleeve (221), an adjusting rod (222), and an elastic member (223); Each of the mounting sleeves (221) is disposed on the top of the housing (10), and each of the mounting sleeves (221) forms the mounting channel (2211). The two mounting sleeves (221) are respectively located on two opposite sides of the housing (10). The connector (21) includes two first rod segments (211), an intermediate rod segment (212), and two limiting nuts (213). The two first rod segments (211) are respectively connected to the two ends of the intermediate rod segment (212) and extend in the same direction. Each first rod segment (211) is used to pass through the corresponding mounting sleeve (221). The bolt rods of each of the first rod segments (211) are used sequentially to pass through the mounting channel (2211) and the printed circuit board (30) to connect with the limiting nut (213); The first rod segment (211) has a plurality of through holes (2111) formed thereon, and the plurality of through holes (2111) are spaced apart along the vertical direction of the first rod segment (211); Each of the mounting sleeves (221) has a through hole (2212) formed therein, and the adjusting member (22) is movably inserted through the through hole (2212) so as to be inserted into or disengaged from the through hole (2111) located below the through hole (2212). The end of the adjusting member (22) away from the first rod segment (211) protrudes outward from the mounting sleeve (221) and forms an operating part (23).

4. The sealing structure for printed circuit boards according to claim 3, characterized in that, The adjusting rod (222) includes a rod body (2221) and a protrusion (2222) that protrudes radially outward from the rod body (2221). The elastic element (223) is located inside the through hole (2212) and sleeved on the rod body (2221). The first end of the elastic element (223) is connected to the protrusion (2222), and the second end of the elastic element (223) is connected to the inner wall of the through hole (2212).

5. The sealing structure for printed circuit boards according to claim 1, characterized in that, The sealing structure further includes at least one mounting member (50), and the housing (10) is detachably connected to the mounting structure (40) via the mounting member (50). The mounting component (50) includes a connecting screw (51) and a connecting nut (52). The first end of the connecting screw (51) is connected to the bottom surface of the housing (10), and the second end of the connecting screw (51) is used to pass through the mounting structure (40) to connect with the connecting nut (52).

6. The sealing structure for printed circuit boards according to claim 1, characterized in that, The shell (10) is constructed as a cuboid and is made of a transparent material.

7. The sealing structure for a printed circuit board according to any one of claims 1-6, characterized in that, The housing (10) includes a housing body (13) and a cover plate (14), and the sealing structure also includes a sealing ring (60). The cover plate (14) is sealed to the opening of the housing body (13) by the sealing ring (60) to define the cavity (11) together with the housing body (13). The housing body (13) has an annular groove around the opening, and the sealing ring (60) is embedded in the annular groove to seal the gap between the housing body (13) and the cover plate (14).

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