High-frequency antenna connecting assembly with protective self-cleaning structure

Abstract

The application discloses a high-frequency antenna connecting assembly with a protective self-cleaning structure and relates to the technical field of automobile antennas. The high-frequency antenna connecting assembly comprises a female seat body and a male terminal assembly. A plug-in cavity is arranged in the female seat body, and a female contact piece is arranged in the plug-in cavity. The male terminal assembly comprises a shell and a male plug pin arranged at the front end of the shell. A self-cleaning unit is arranged in the plug-in cavity. The self-cleaning unit comprises an inner sliding groove arranged in the axial direction of the plug-in cavity and a wiper slidingly fitted in the inner sliding groove. A limiting plate is arranged at the open end of the female seat body and used for limiting the sliding stroke of the wiper. The surfaces of the male plug pin and the female contact piece are covered with a nano protective coating. When the male plug pin is inserted into or pulled out of the plug-in cavity, the wiper reciprocally slides along the sliding groove under the driving of the plug-in and plug-out action, wipes and cleans the surface of the male plug pin, and realizes automatic self-cleaning during the plug-in and plug-out process. The high-frequency antenna connecting assembly can effectively remove dirt from the male plug pin, improve the signal transmission stability and enhance the dustproof and waterproof performance, and is suitable for vehicle-mounted, outdoor and high-frequency communication antenna systems.

Description

Technical Field

[0001] This invention relates to the field of automotive antenna technology, and in particular to a high-frequency antenna connection assembly with a protective self-cleaning structure. Background Technology

[0002] With the rapid development of intelligent connected vehicles and autonomous driving technology, the number of high-frequency antenna components (such as millimeter-wave radar antennas, GPS / BeiDou antennas, 5G communication antennas, etc.) installed on vehicles is constantly increasing. These antennas are usually placed on the roof, rearview mirror covers, or inside the front bumper to achieve high-bandwidth data transmission, precise positioning, and environmental perception. However, during the driving process, vehicles are affected by pollutants such as rainwater, mud, dust, and insect residue. These impurities adhere to the antenna surface or cover for a long time, which can lead to signal attenuation, echo interference, and decreased receiving sensitivity, thereby affecting communication quality and perception accuracy.

[0003] Existing high-frequency antenna components generally employ sealed or waterproof covers to prevent moisture and dust intrusion; however, these protective structures are mostly static seals and cannot actively remove external contaminants. Once dirt adheres to the cover surface, it can only be cleaned externally or wiped manually. Some manufacturers have attempted to coat the radome surface with a hydrophobic film or use highly smooth materials to reduce the adhesion of water droplets and dust, but these coatings are prone to aging and failure under long-term exposure to ultraviolet rays, high temperatures, and sandstorms, gradually reducing their cleaning effectiveness. Furthermore, if a vehicle travels on muddy roads or encounters rain or snow while driving at high speeds, the radome is easily covered by water films and mud, obstructing the signal propagation path.

[0004] In high-frequency applications (such as the 24GHz or 77GHz millimeter-wave bands), even minute changes in the dielectric constant of the radome surface can cause reflection loss and phase shift. Therefore, maintaining the cleanliness of the radome surface is crucial. Existing technologies include simple cleaning solutions using water spray nozzles or wiper blades, but these components are large, complex, inconvenient to maintain, and have limited cleaning areas, making them difficult to integrate into the compact design of automotive radomes. Furthermore, gaps at the connection points between the antenna and the vehicle body can allow water or dust to accumulate, affecting signal transmission and connection reliability.

[0005] In summary, the existing technology has at least the following technical problems:

[0006] Existing automotive antennas lack a self-cleaning structure that can actively remove dirt, and the antenna connection parts are not adequately protected, which can easily lead to signal attenuation and reduced connection reliability. Summary of the Invention

[0007] The purpose of this invention is to provide a high-frequency antenna connection assembly with a protective self-cleaning structure to solve the technical problems of existing automotive antennas lacking a self-cleaning structure that can actively remove dirt, and the antenna connection parts being poorly protected, which easily leads to signal attenuation and reduced connection reliability.

[0008] The preferred technical solutions among the many technical solutions provided by this invention can produce a variety of technical effects, which are described in detail below.

[0009] To address the aforementioned technical problems, the present invention provides the following technical solution:

[0010] This invention provides a high-frequency antenna connection assembly with a protective self-cleaning structure, including a female connector body with an internal insertion cavity containing a female contact piece; a male connector assembly with a housing and a male pin disposed at the front end of the housing; a self-cleaning unit disposed within the insertion cavity, the self-cleaning unit including an inner groove arranged axially along the insertion cavity and a scraper slidably engaged with the inner groove; a limiting plate mounted on the opening end of the female connector body to limit the sliding stroke of the scraper; and a nano-protective coating covering the surfaces of the male pin and the female contact piece; wherein, during the insertion of the male connector assembly into the insertion cavity, the scraper is driven to slide along the inner groove and scrape and clean the surface of the male pin; during the removal process, the scraper resets and cleans the surface of the male pin again, thereby achieving automatic cleaning during insertion and removal.

[0011] In one embodiment, the scraper is made of flexible polytetrafluoroethylene material, and the cutting edge of the scraper is elastically fitted to the outer surface of the male pin.

[0012] In one embodiment, a micro-vibrating plate is provided on the back of the scraper. The micro-vibrating plate receives a plugging / unplugging signal when the male pin and the female contact are in plugging / unplugging contact, and triggers the micro-vibrating plate to generate low-frequency vibration to shake off the attached particles.

[0013] In one embodiment, the micro-vibrating plate is a piezoelectric micro-vibrating plate. The two electrodes of the piezoelectric micro-vibrating plate are permanently electrically connected to the female contact and abut against the male pin when the male terminal assembly is docked with the female body. When the male terminal assembly is docked with the female body and one of the electrodes of the piezoelectric micro-vibrating plate is in contact with the peripheral wall of the male pin, the circuit of the piezoelectric micro-vibrating plate is connected to receive power, triggering the piezoelectric micro-vibrating plate to generate high-frequency micro-vibration, shaking off contaminants from the male pin, the female contact, and the scraper surface.

[0014] In one embodiment, the scraper consists of two opposing semicircular blades, driven by two limiting plates arranged opposite to each other on the outer side of the female body, causing the two semicircular blades to clamp inward or expand outward toward the male pin.

[0015] In one embodiment, the limiting plate has a connecting piece on the side facing the scraper, and the scraper has a hook hole on one side; one end of the connecting piece is rotatably connected to the limiting plate, and the other end is hooked to the hook hole; the limiting plate is connected to the female body through an elastic element; when the scraper is clamped and reset in the middle, the connecting piece provides a rebound force for the two semicircular pieces to clamp towards the male pin; when the scraper expands outward, the male pin is inserted into the insertion cavity through the clamping of the two semicircular pieces, and the limiting plate provides limiting pressure for the outward expansion of the two semicircular pieces, so that the cutting edges of the two semicircular pieces are elastically attached to the outer surface of the male pin.

[0016] In one embodiment, the inner groove is provided with two oppositely arranged guide protrusions, and the outer periphery of the two semicircular pieces is provided with guide grooves. The guide protrusions and the guide grooves are slidably engaged to stabilize the sliding posture of the scraper.

[0017] In one embodiment, the nano-protective coating is a fluorosilicone resin-based protective layer with a thickness of 0.2–1 μm.

[0018] In one embodiment, a first sealing ring is provided in the area where the female body and the outer shell meet to enhance waterproof and dustproof performance.

[0019] In one embodiment, a dustproof cover is slidably fitted onto the outside of the female connector body. The dustproof cover is connected to the outside of the female connector body via an outer sliding groove and is offset from the position of the limiting plate. It is used to close the entrance of the insertion cavity of the female connector body in the non-connected state. A second sealing ring is embedded on the inner side of the dustproof cover. The second sealing ring abuts against the entrance of the insertion cavity to enhance the waterproof and dustproof performance of sealing the insertion cavity.

[0020] The beneficial effects of this invention are as follows:

[0021] (1) Automatic cleaning is achieved, significantly reducing the risk of signal attenuation. The present invention provides an axially sliding scraper structure in the insertion cavity of the female body. The mechanical driving force of the male pin insertion and removal process is used to achieve synchronous scraping and cleaning of the terminal surface. It can automatically remove the attached dust, water vapor or oil film, avoiding or reducing the problems of increased contact resistance and high frequency signal attenuation.

[0022] (2) Construct a multi-layer protection system to improve connection reliability and environmental adaptability; through the cooperation of the inner slide and the limiting plate, the scraper can be stably guided and accurately reset, ensuring the controllability and repeatability of the cleaning action; the nano protective coating forms a low surface energy interface on the male pin and female contact, which can effectively inhibit the adhesion and corrosion of pollutants, thereby improving the long-term stability of the connection components in high humidity, high dust and high salt spray environments.

[0023] (3) The structure is compact and compatible with standard high-frequency interface forms; the self-cleaning unit is integrated inside the main body of the female connector, without changing the shape and installation size of the traditional IPEX or SMA type interface, which is convenient to directly replace or modularly apply in the existing vehicle high-frequency antenna platform. No additional drive or control mechanism is required, and it has good manufacturability and low cost advantages.

[0024] (4) Extend service life and reduce maintenance requirements; the plug-and-play cleaning structure keeps the male pin surface clean, reduces the frequency of manual maintenance and cleaning costs, significantly extends the service life of high-frequency connection components, and ensures long-term signal consistency and transmission quality of millimeter-wave antenna systems.

[0025] In summary, through dual innovations at both the structural and material levels, this invention achieves self-cleaning and protection functions that traditional high-frequency antenna connectors lack. It possesses high stability, high reliability, and excellent environmental adaptability, and can significantly improve the overall performance and durability of vehicle-mounted high-frequency communication systems. Attached Figure Description

[0026] To more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is an assembly diagram of the high-frequency antenna connection assembly of the present invention;

[0028] Figure 2 This is a partial cross-sectional view of the high-frequency antenna connection assembly of the present invention;

[0029] Figure 3 This is a front view schematic diagram of the combined structure of the female base body, scraper, limiting plate and dustproof sliding cover of the present invention;

[0030] Figure 4 This is a cross-sectional structural diagram of the male pin and nano-protective coating of the present invention;

[0031] Figure 5This is a schematic cross-sectional view of the combined structure of the female body, scraper, limiting plate, micro vibration plate and male pin of the present invention.

[0032] The reference numerals in the attached figures are as follows:

[0033] 1. Female connector body; 11. Insertion cavity; 12. Female contact piece;

[0034] 2. Male terminal assembly; 21. Housing; 22. Male pin; 23. Second positioning hook;

[0035] 3. Self-cleaning unit; 31. Inner groove; 311. Guide ridge; 32. Scraper; 321. Semicircular blade; 322. Blade edge; 323. Hook hole; 324. Guide groove; 33. Micro vibrating plate; 331. Electrode receiving device;

[0036] 4. Limiting plate; 41. Connecting piece; 42. Elastic element; 43. First positioning hook;

[0037] 5. Nano-protective coating;

[0038] 6. First sealing ring;

[0039] 7. Dustproof sliding cover; 71. Second sealing ring. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0041] This embodiment provides a high-frequency antenna connection assembly with a protective self-cleaning structure, including a female connector body and a male terminal assembly. The female connector body has a plug-in cavity, in which a female contact is installed. The male terminal assembly includes a housing and a male pin arranged at the front end of the housing. The plug-in cavity has a self-cleaning unit, which includes an inner groove arranged along the axial direction of the plug-in cavity and a scraper that slides into the inner groove. A limiting plate is installed at the open end of the female connector body to limit the sliding stroke of the scraper. The surfaces of the male pin and the female contact are covered with a nano-protective coating. When the male pin is inserted into or pulled out of the plug-in cavity, the scraper slides back and forth along the groove under the drive of the insertion and removal action to scrape and clean the surface of the male pin, realizing automatic self-cleaning during the insertion and removal process. The high-frequency antenna connection assembly can effectively remove dirt from the male pin, improve signal transmission stability, and enhance dust and water resistance. It is suitable for vehicle-mounted, outdoor, and high-frequency communication antenna systems. It effectively solves the technical problems of existing automotive antennas lacking a self-cleaning structure that can actively remove dirt and the antenna connection parts being poorly protected, which easily leads to signal attenuation and decreased connection reliability.

[0042] The first implementation of the high-frequency antenna connection assembly is as follows: Figures 1 to 4As shown, the device includes a female connector body 1 with a socket cavity 11 and a female contact piece 12 inside the socket cavity 11; a male connector assembly 2 with a housing 21 and a male pin 22 arranged at the front end of the housing 21; a self-cleaning unit 3 disposed in the socket cavity 11, the self-cleaning unit 3 including an inner groove 31 arranged along the axial direction of the socket cavity 11 and a scraper 32 slidably engaged with the inner groove 31; a limiting plate 4 installed at the open end of the female connector body 1 to limit the sliding stroke of the scraper 32; and a nano-protective coating 5 covering the surfaces of the male pin 22 and the female contact piece 12. During the insertion of the male connector assembly 2 into the socket cavity 11, the scraper 32 is driven to slide along the inner groove 31 and scrape and clean the surface of the male pin 22; during the removal process, the scraper 32 resets and cleans the surface of the male pin 22 again, thereby achieving automatic cleaning during the insertion and removal process.

[0043] The high-frequency antenna connection assembly with a protective self-cleaning structure provided by this invention introduces a multi-cooperative mechanism of "sliding groove - scraper 32 - limiting plate 4 - nano protective coating 5" on the basis of the traditional IPEX type high-frequency connector structure, realizing automatic cleaning and long-term protection functions under insertion and removal actions, and has several technical effects: including realizing automatic cleaning and significantly reducing the risk of signal attenuation; the present invention sets an axially sliding scraper 32 structure in the insertion cavity 11 of the female body 1, and uses the mechanical driving force of the male pin 22 during the insertion and removal process to realize synchronous scraping and cleaning of the terminal surface, which can automatically remove the attached dust, moisture or oil film, avoiding or reducing the problems of increased contact resistance and high-frequency signal attenuation.

[0044] A multi-layered protection system is constructed to improve connection reliability and environmental adaptability. Through the cooperation of the inner slide groove 31 and the limiting plate 4, the scraper 32 is stably guided and accurately reset, ensuring the controllability and repeatability of the cleaning action. The nano-protective coating 5 forms a low surface energy interface on the male pin 22 and the female contact 12, which can effectively inhibit the adhesion and corrosion of pollutants, thereby improving the long-term stability of the connection components in high humidity, high dust and high salt spray environments.

[0045] With a compact structure, it is compatible with standard high-frequency interface forms; the self-cleaning unit 3 is integrated inside the main body 1 of the female connector, without changing the shape and installation size of the traditional IPEX or SMA type interface, which makes it easy to directly replace or modularly apply in existing vehicle high-frequency antenna platforms without the need for additional drive or control mechanisms, and has good manufacturability and low cost advantages.

[0046] Extends service life and reduces maintenance requirements; the plug-and-play cleaning structure keeps the surface of the male pin 22 clean, reducing the frequency of manual maintenance and cleaning costs, significantly extending the service life of high-frequency connection components, and ensuring long-term signal consistency and transmission quality of millimeter-wave antenna systems.

[0047] In summary, through dual innovations at both the structural and material levels, this invention achieves self-cleaning and protection functions that traditional high-frequency antenna connectors lack. It possesses high stability, high reliability, and excellent environmental adaptability, and can significantly improve the overall performance and durability of vehicle-mounted high-frequency communication systems.

[0048] As one alternative implementation method:

[0049] Regarding the specific structure of the aforementioned scraper 32, this embodiment is as follows: Figure 2 and Figure 3 As shown, the scraper 32 consists of two opposing semicircular pieces 321, driven by two opposing limiting plates 4 arranged on the outside of the female body 1, so that the two semicircular pieces 321 are clamped inward or expanded outward towards the male pin 22; the cutting edge 322 of the scraper 32 is elastically attached to the outer surface of the male pin 22.

[0050] In application, the two opposing semicircular blades 321 and scraper blades 32, driven by the limiting plate 4, can synchronously clamp and expand, forming a symmetrical self-cleaning effect during the insertion or removal of the male pin 22. Specifically, the two limiting plates 4 provide driving force for the inward clamping movement of the scraper blades 32, causing the cutting edge 322 to form a circumferential covering contact along the surface of the male pin 22, thereby achieving full-circumferential scraping cleaning during insertion and removal. This dual-blade symmetrical structure not only improves the cleaning coverage but also automatically adapts to the slight eccentricity or radial tolerance of the male pin 22, ensuring uniform distribution of contact pressure and avoiding localized wear. Through this structural collaboration, the scraper blades 32 and the limiting plate 4 form a mechanically synchronized cleaning mechanism. When the cleaned male pin 22 contacts the female contact piece 12, it can significantly reduce the accumulation of contact resistance and signal attenuation, ensuring stable terminal insertion and removal performance.

[0051] In addition, the outer edge of the scraper blade 32 adjacent to the inner groove 31 is provided with a micro-arc chamfer to reduce scraping resistance and improve cleaning efficiency and coaxiality retention performance.

[0052] Regarding the material of the scraper 32 and its function, the scraper 32 is made of flexible polytetrafluoroethylene material.

[0053] In application, the scraper 32, made of flexible polytetrafluoroethylene (PTFE), possesses a low coefficient of friction and excellent anti-adhesion properties, enabling the cutting edge 322 to effectively remove contaminants without damaging the metal plating when sliding against the surface of the male pin 22. PTFE maintains stable elasticity even in high and low temperature and humid environments. The elastic fit with the male pin 22, combined with the restoring elasticity of the limiting plate 4, ensures that the scraper 32 maintains adaptive contact pressure throughout the insertion and removal cycles of the male pin 22.

[0054] The flexible polytetrafluoroethylene (PTFE) scraper 32 works synergistically with the nano-protective coating 5 to further reduce the possibility of dirt re-adhesion on the surface of the male pin 22 after mechanical cleaning, thereby achieving a dual protective effect of mechanical wiping and surface anti-fouling.

[0055] In addition, the outer surface of the scraper 32 can be further coated with a conductive fluorocarbon coating to reduce the effect of electrostatic adsorption of dust.

[0056] Regarding the specific structure of the connection between the aforementioned limiting plate 4, scraper 32, and female seat body 1, this embodiment is as follows: Figures 1 to 3 As shown, the limiting plate 4 has a connecting piece 41 on the side facing the scraper 32, and the scraper 32 has a hook hole 323 on one side; one end of the connecting piece 41 is rotatably connected to the limiting plate 4, and the other end is hooked to the hook hole 323; the limiting plate 4 is connected to the female body 1 through the elastic element 42; when the scraper 32 is clamped and reset, the connecting piece 41 provides a rebound force for the two semicircular pieces 321 to clamp the male pin 22; when the scraper 32 expands outward, the male pin 22 is inserted into the insertion cavity 11 through the clamping of the two semicircular pieces 321, and the limiting plate 4 provides a limiting pressure for the outward expansion of the two semicircular pieces 321, so that the cutting edge 322 of the two semicircular pieces 321 is elastically attached to the outer surface of the male pin 22.

[0057] When applied, the limiting plate 4 forms a swingable reset structure through the hooking mechanism between the connecting piece 41 and the scraper 32, so that the scraper 32 can obtain stable guidance and control during clamping reset and outward insertion. The elastic element 42 can be a plastic ear or metal spring sheet integrally formed with the limiting plate 4, or it can be a spring or elastic sheet with one end connected to the female body 1 and the other end connected to the limiting plate 4.

[0058] Specifically, the pre-tightening effect of the elastic element 42 ensures that the scraper 32 has a constant clamping force when it contacts the male pin 22, thereby achieving adaptive clamping and resetting cleaning during the insertion and removal action; the transmission chain of this structure realizes the mechanical coordination of "limiting plate 4 - connecting piece 41 - scraper 32", so that the scraper 32 always moves symmetrically along the central axis of the male pin 22, which not only improves cleaning efficiency, but also effectively prevents the scraper 32 from being misaligned or stuck; this mechanism can still maintain mechanical consistency under long-term vibration or temperature difference changes, significantly improving the reliability of the connecting components.

[0059] Alternatively, the elastic element 42 can also be a helical spring or a shape memory alloy ring to achieve adjustable rebound force.

[0060] A first positioning hook 43 is provided on the side of the limiting plate 4 facing the scraper 32, and a second positioning hook 23 is provided on the outer shell 21 of the male terminal assembly 2 at the position corresponding to the positioning hook. When the male terminal assembly 2 is combined with the female body 1, the first positioning hook 43 and the second positioning hook 23 are interlocked to prevent the male terminal assembly 2 from being disengaged from the female body 1 due to vibration.

[0061] Regarding the specific materials used in the aforementioned nano-protective coating 5, as well as its coverage thickness and function, this implementation, for example... Figure 4 As shown, the nano-protective coating 5 is a fluorosilicone resin-based protective layer with a thickness of 0.2–1 μm.

[0062] When applied, a fluorosilicone resin-based nano-protective coating 5 is used to form a dense low surface energy interface layer on the surface of the male pin 22 and the female contact 12. This effectively inhibits water vapor condensation and dust adhesion on the surface of the male pin 22 and the female contact 12, and avoids oxidation corrosion and changes in surface dielectric constant.

[0063] Furthermore, the thickness of the fluorosilicone resin-based protective layer is controlled within the range of 0.2 to 1 μm, which does not affect the transmission performance of high-frequency signals. At the same time, it can be used in conjunction with the scraper 32 made of flexible material to achieve a composite protective effect of "mechanical decontamination + hydrophobic dust repellency". The fluorosilicone resin-based protective layer of the male pin 22 has a certain self-healing ability by repeatedly contacting the scraper 32 during insertion and removal cycles, maintaining the surface cleanliness and stable electrical properties.

[0064] The nano-protective coating 5 can be prepared by sol-gel method or plasma deposition; and fluorinated graphite microparticles are introduced into the coating to enhance wear resistance.

[0065] Regarding the waterproof and dustproof sealing structure for the insertion of the female connector body 1 and the male terminal assembly 2, this embodiment is, for example... Figure 1 and Figure 2 As shown, a first sealing ring 6 is provided in the area where the female body 1 and the outer shell 21 meet to enhance waterproof and dustproof performance.

[0066] When applied, the first sealing ring 6 between the female connector body 1 and the housing 21 of the male terminal assembly 2 provides a radial seal to prevent rainwater, oil mist and dust particles from entering from the interface gaps, ensuring a clean environment inside the insertion cavity 11.

[0067] When the first sealing ring 6 is in the crimped state, it makes the insertion cavity 11 and the surrounded male pin 22 form a sealed cavity, thereby forming a closed protective space with the self-cleaning unit 3. This protective structure and the nano-coating complement each other, so that the antenna connection end still has stable protective performance under harsh working conditions, effectively improving the overall resistance to environmental pollution and signal stability.

[0068] A second embodiment of the high-frequency antenna connection assembly, for example Figure 2 and Figure 3 As shown, the difference between this embodiment and the first embodiment is that the inner groove 31 is provided with two oppositely arranged guide protrusions 311, and the outer periphery of the two semicircular pieces 321 is provided with guide grooves 324. The guide protrusions 311 and the guide grooves 324 slide in cooperation to stabilize the sliding posture of the scraper 32.

[0069] During application, the guide ridge 311 and the guide groove 324 on the outer periphery of the scraper 32 cooperate to ensure the movement stability and coaxial accuracy of the scraper 32 during insertion and removal, and prevent the scraper 32 from tilting or rotating out of place. This guide mechanism ensures that the cutting edge 322 of the scraper 32 always maintains a consistent contact trajectory along the surface of the male pin 22, improving cleaning uniformity and reducing surface scratches caused by uneven wear. The guide structure, the limiting plate 4, and the connecting piece 41 synchronously guide the movement of the scraper 32, realizing the physical constraint on the clamping and outward expansion bidirectional movement of the scraper 32, ensuring its repeatability and wear resistance during long-term use.

[0070] In addition, the guide groove 324 can be coated with a small amount of lubricating layer to reduce wear.

[0071] A third embodiment of the high-frequency antenna connection assembly, for example Figure 5 As shown, the difference between this embodiment and the first embodiment is that a micro-vibrating plate 33 is provided on the back of the scraper 32. The micro-vibrating plate 33 obtains the insertion and removal signal when the male pin 22 and the female contact plate 12 are in contact, and triggers the micro-vibrating plate 33 to generate low-frequency vibration to shake off the attached particles.

[0072] Among them, the micro-vibrating plate 33 is a piezoelectric micro-vibrating plate. The two receiving electrodes 331 of the piezoelectric micro-vibrating plate are permanently electrically connected to the female contact plate 12 and abut against the male pin 22 when the male terminal assembly 2 is connected to the female body 1. When the male terminal assembly 2 is connected to the female body 1 and one receiving electrode 331 of the piezoelectric micro-vibrating plate is in contact with the peripheral wall of the male pin 22, the circuit of the piezoelectric micro-vibrating plate is connected to receive power, triggering the piezoelectric micro-vibrating plate to generate high-frequency micro-vibration, shaking off contaminants on the surface of the male pin 22, the female contact plate 12 and the scraper 32.

[0073] During application, the piezoelectric micro-vibrator is activated the instant it connects to the male pin 22 and female contact 12, generating high-frequency micro-vibration. This causes microparticles on the surfaces of the male pin 22, female contact 12, and scraper 32 to loosen and fall off. This design uses the insertion / removal electrical signal at the moment of connection as a trigger source to achieve self-driven vibration cleaning without external power. The piezoelectric micro-vibrator is set to vibrate for 3-5 seconds each time the insertion / removal electrical signal is triggered by power-on. This allows the mechanical cleaning of the piezoelectric micro-vibrator and the scraper 32 to work together to effectively remove dust and moisture film, further improving signal stability and contact reliability. This solution combines automation, energy saving, and compact integration, making it suitable for long-term enclosed application environments of high-frequency communication interfaces.

[0074] The piezoelectric element can be made of PZT or PVDF material, and the vibration frequency can be set in the range of 20 to 100 Hz. In the multi-interface module, multiple vibrating elements can be controlled to operate simultaneously by a synchronization signal.

[0075] A fourth embodiment of the high-frequency antenna connection assembly, for example Figure 1 and Figure 2 As shown, the difference between this embodiment and the first embodiment is that a dustproof sliding cover 7 is slidably fitted on the outside of the female body 1. The dustproof sliding cover 7 is connected to the outside of the female body 1 through an outer sliding groove and is offset from the position of the limiting plate 4. It is used to close the entrance of the insertion cavity 11 of the female body 1 in the non-connected state. A second sealing ring 71 is embedded in the inner side of the dustproof sliding cover 7. The second sealing ring 71 abuts against the entrance of the insertion cavity 11 to enhance the waterproof and dustproof performance of the sealed insertion cavity 11.

[0076] When in use, the dustproof sliding cover 7 seals the entrance of the insertion cavity 11 through the outer sliding groove when not connected, effectively preventing dust and moisture from entering; before inserting the male terminal assembly 2, open the dustproof sliding cover 7 first, and then insert the male terminal assembly 2 to avoid interfering with the cleaning movement of the scraper 32.

[0077] The combination of the dustproof sliding cover 7 and the second sealing ring 71 further enhances the airtightness, allowing the component to remain protected even when not in use.

[0078] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described.

Claims

1. A high-frequency antenna connection assembly with a protective self-cleaning structure, characterized in that, The device includes a female connector body with an internal insertion cavity containing a female contact piece; a male terminal assembly with a housing and a male pin disposed at the front end of the housing; a self-cleaning unit disposed within the insertion cavity, the self-cleaning unit including an inner groove arranged axially along the insertion cavity and a scraper slidably engaged with the inner groove; a limiting plate mounted on the open end of the female connector body to limit the sliding stroke of the scraper; and a nano-protective coating covering the surfaces of the male pin and the female contact piece. During insertion of the male terminal assembly into the insertion cavity, the scraper is driven to slide along the inner groove and clean the surface of the male pin; during removal, the scraper resets and cleans the surface of the male pin again, thus achieving automatic cleaning during insertion and removal. The scraper is made of flexible polytetrafluoroethylene material, and the cutting edge of the scraper is elastically fitted to the outer surface of the male pin. The scraper consists of two opposing semicircular blades, driven by two limiting plates arranged opposite to each other on the outer side of the female body, causing the two semicircular blades to clamp inward or expand outward toward the male pin. The limiting plate has a connecting piece on the side facing the scraper, and the scraper has a hook hole on one side; one end of the connecting piece is rotatably connected to the limiting plate, and the other end is hooked to the hook hole; the limiting plate is connected to the female body through an elastic element; when the scraper is clamped and reset inside, the connecting piece provides a rebound force for the two semicircular pieces to clamp towards the male pin; when the scraper expands outward, the male pin is inserted into the insertion cavity through the clamping of the two semicircular pieces, and the limiting plate provides limiting pressure for the outward expansion of the two semicircular pieces, so that the cutting edges of the two semicircular pieces are elastically attached to the outer surface of the male pin; The inner groove is provided with two oppositely arranged guide protrusions, and the outer periphery of the two semicircular pieces is provided with guide grooves. The guide protrusions and the guide grooves are slidably engaged to stabilize the sliding posture of the scraper.

2. The high-frequency antenna connection assembly according to claim 1, characterized in that, The back of the scraper is provided with a micro-vibrating plate. When the male pin and the female contact are in contact, the micro-vibrating plate obtains the insertion and removal signal and triggers the micro-vibrating plate to generate low-frequency vibration to shake off the attached particles.

3. The high-frequency antenna connection assembly according to claim 2, characterized in that, The micro-vibrating plate is a piezoelectric micro-vibrating plate. The two electrodes of the piezoelectric micro-vibrating plate are permanently electrically connected to the female contact and abut against the male pin when the male terminal assembly is docked with the female body. When the male terminal assembly is docked with the female body and one of the electrodes of the piezoelectric micro-vibrating plate is in contact with the peripheral wall of the male pin, the circuit of the piezoelectric micro-vibrating plate is connected to receive power, triggering the piezoelectric micro-vibrating plate to generate high-frequency micro-vibration, shaking off contaminants from the surface of the male pin, the female contact, and the scraper.

4. The high-frequency antenna connection assembly according to claim 1, characterized in that, The nano-protective coating is a fluorosilicone resin-based protective layer with a thickness of 0.2–1 μm.

5. The high-frequency antenna connection assembly according to claim 1, characterized in that, The area where the female body and the outer shell meet is provided with a first sealing ring to enhance waterproof and dustproof performance.

6. The high-frequency antenna connection assembly according to claim 1, characterized in that, A dustproof cover is slidably fitted onto the outside of the female connector body. The dustproof cover is connected to the outside of the female connector body via an outer sliding groove and is offset from the position of the limiting plate. It is used to close the entrance of the insertion cavity of the female connector body in the non-connected state. A second sealing ring is embedded on the inner side of the dustproof cover. The second sealing ring abuts against the entrance of the insertion cavity to enhance the waterproof and dustproof performance of sealing the insertion cavity.

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