Double locking type anti-falling vehicle-mounted shark fin antenna

Abstract

The application relates to the technical field of vehicle-mounted antennas, and discloses a double-locking type anti-falling vehicle-mounted shark fin antenna, which comprises a shark fin shell, a rotating seat, a rotating cavity, a swing piece, a mounting cavity and a base. The rotating cavity is internally provided with the swing piece, and the lower surface of the rotating seat is provided with the mounting cavity. The base is fixed to the top of a vehicle body. The double-locking type anti-falling vehicle-mounted shark fin antenna can effectively solve the problem that the shark fin antenna shell is usually adhered to the top of a vehicle body, the shark fin antenna shell is fixedly attached to the roof of the vehicle by the adhesive, the adhesive gradually ages, hardens and decays in adhesion during long-term driving of the vehicle under outdoor environments such as sunlight exposure, rain washing and temperature sudden change, and the shark fin antenna is prone to edge lifting after being used for a period of time, and the shark fin antenna is directly separated from the roof of the vehicle when subjected to strong wind load scenes such as strong wind and high-speed driving.

Description

Technical Field

[0001] This invention relates to the field of vehicle antenna technology, specifically to a dual-locking anti-drop vehicle shark fin antenna. Background Technology

[0002] A shark fin antenna is a streamlined antenna mounted on the roof of a car, named for its resemblance to a shark's dorsal fin. Its core function is to act as a vehicle antenna, receiving and enhancing FM / AM radio, GPS navigation, and 4G / 5G network signals. Simultaneously, its streamlined design reduces wind resistance and noise, improves fuel economy and driving stability, and also features anti-static safety features.

[0003] In existing technologies, the outer shell of a shark fin antenna is usually glued to the top of the vehicle body. The adhesive properties of the glue are used to fix the shark fin antenna shell to the roof. However, during long-term driving, cars are frequently exposed to outdoor environments such as sun exposure, rain, and sudden temperature changes. The glue will gradually age, harden, and lose its adhesiveness. After a period of use, the shark fin antenna is very prone to edge lifting. When encountering strong wind loads such as strong winds or high-speed driving, it may even fall off. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a dual-locking anti-fall-off vehicle-mounted shark fin antenna. This effectively solves the problem that in existing technologies, the shark fin antenna shell is typically glued to the top of the vehicle body, using the adhesive properties to fix the shark fin antenna shell to the roof. However, during long-term driving, vehicles frequently experience outdoor environments such as exposure to sunlight, rain, and sudden temperature changes. As a result, the adhesive gradually ages, hardens, and loses its adhesiveness. After a period of use, the shark fin antenna is prone to edge lifting, and it may even detach completely when encountering strong winds or high-speed driving.

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

[0006] This invention provides a dual-locking anti-drop vehicle-mounted shark fin antenna, comprising:

[0007] Shark fin shell;

[0008] A rotating base, wherein a rotating cavity is provided inside the rotating base, a swinging component is provided inside the rotating cavity, and an installation cavity is provided on the lower surface of the rotating base;

[0009] The base is fixed to the top of the vehicle body. A boss that fits against the inner wall surface of the rotating cavity is fixedly connected to the upper surface of the base. The boss is provided with a connecting piece for fixing the rotating seat through a placement cavity opened inside it.

[0010] The connecting component includes a rotating rod, which is rotatably connected to the placement cavity via a shaft located in its middle. The rotating rod has two sliding grooves, which are symmetrically distributed around the shaft. A pressing plate is rotatably connected inside the lower sliding groove, and a retaining plate is rotatably connected inside the upper sliding groove. A spring is provided on the side of the pressing plate near the center line of the base, which is connected to the inner wall of the placement cavity.

[0011] The placement cavity is provided in a plurality of ways, and the plurality of placement cavities are arranged in a circular array around the center line of the base. The boss has a foolproof notch inside.

[0012] Furthermore, the rotating seat has a slot that communicates with the rotating cavity, the outer surface of the pressing plate penetrates the placement cavity and is flush with the outer surface of the boss, and the outer surface of the card plate penetrates the placement cavity and extends into the slot.

[0013] Furthermore, the mounting cavity adopts an annular conical design, with the minimum inner diameter of the mounting cavity located closer to the lower side.

[0014] Furthermore, the swinging component includes a pivot shaft that penetrates the interior of the shark fin shell. The outer end of the pivot shaft is fixedly connected to the inner wall surface of the rotating cavity. A connecting rod is fixedly connected to the inner wall surface of the rotating cavity. A support rod is fixedly connected to the upper surface of the connecting rod. A fixing block is fixedly connected to the inner wall surface of the shark fin shell. Two fixing blocks are provided and symmetrically distributed along the connecting rod. An arc-shaped rod is fixedly connected to the upper surface of the two fixing blocks.

[0015] Furthermore, the arc-shaped rod passes through the middle of the support rod, and a bending spring connected to the upper surface of the fixed block is provided on the outer surface of the support rod. The bending spring is sleeved on the outer circumference of the arc-shaped rod, and the rotating seat is provided with a linkage through a receiving groove opened inside it.

[0016] Furthermore, the linkage includes a wind-receiving plate that is slidably connected to the inside of the receiving groove. A connecting rod is fixedly connected to the side of the wind-receiving plate near the shark fin shell, and a pressure plate is fixedly connected to the end of the connecting rod away from the wind-receiving plate.

[0017] Furthermore, the inner surface of the rotating seat is provided with a limiting groove that communicates with the interior of the rotating cavity, and the lower surface of the shark fin shell is slidably connected with a limiting plate that fits against the top of the inner wall of the limiting groove. An elastic element that connects to the bottom of the shark fin shell is provided on the side of the limiting plate near the axis of the rotating seat.

[0018] Furthermore, two receiving slots are provided, which are formed on the left and right sides of the shark fin shell in the rotating seat. The limiting plate extends to the upper surface of the shark fin shell and fits against the lower surface of the limiting slot. The outer surface of the limiting plate is always in contact with the side of the pressure plate away from the connecting rod.

[0019] Furthermore, the outer surface of the shark fin shell is provided with a flexible membrane connected to the upper surface of the rotating seat, a magnetic block one is embedded on the upper surface of the boss, and a magnetic block two is embedded inside the rotating seat.

[0020] The technical solution provided by this invention has the following advantages compared with the prior art:

[0021] This invention comprises a base, a rotating seat, a shark fin shell, and a swinging component. Existing adhesive-fixed antennas are susceptible to aging and failure due to prolonged exposure to sunlight, rain, and wind loads, leading to antenna loosening and detachment, posing a safety hazard. The base of this invention is bolted through the vehicle roof and locked in place, achieving a rigid connection to the vehicle body. The rotating seat and base are precisely locked together via a locking plate in the connector and a slot inside the rotating seat, ensuring stability and preventing the rotating seat from detaching from the base in both vertical and horizontal directions. Even under extreme conditions such as high-speed driving and strong winds, the antenna remains secure, ensuring driving safety and stable signal reception. Under normal driving conditions, the cooperation of the dual limiting plates and limiting slots keeps the shark fin shell vertical, with its lower surface parallel to the lower surface of the base. Furthermore, the left limiting plate can only rotate counterclockwise, and the right can only rotate clockwise, forming a bidirectional limiting constraint that ensures antenna stability under normal driving conditions and maintains the optimal signal reception angle. When crosswinds are in effect, only the windward side limit is unlocked, while the other side remains locked, causing the shell to swing in only one direction and avoiding disorderly shaking. After the crosswinds disappear, the bending spring and elastic element release their elastic force simultaneously, driving each component to precisely reset to its initial state, achieving locking of the shark fin shell in a vertical state, ensuring stability while ensuring that the angle of signal reception is in the optimal state. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0023] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention;

[0024] Figure 2This is a schematic diagram of the structure of the shark fin shell, rotating shaft and base installed on the roof of a vehicle according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the separated structure of the shark fin shell, rotating shaft, and base according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the separation structure of the shark fin shell, the rotating shaft, and the base from another angle according to an embodiment of the present invention;

[0027] Figure 5 This is a schematic cross-sectional view of the shark fin shell, flexible membrane, and rotating shaft according to an embodiment of the present invention.

[0028] Figure 6 This is an embodiment of the present invention. Figure 5 A magnified structural diagram of part A in the middle;

[0029] Figure 7 This is a cross-sectional structural diagram of the shark fin shell, rotating base, linkage component, and swing component according to an embodiment of the present invention;

[0030] Figure 8 This is a bottom view structural diagram of the shark fin shell and linkage component according to an embodiment of the present invention.

[0031] The labels in the diagram represent: 1. Shark fin shell; 11. Flexible membrane; 2. Rotating seat; 21. Rotating cavity; 22. Swinging component; 221. Rotating shaft; 222. Connecting rod; 223. Support rod; 224. Fixing block; 225. Arc rod; 226. Spring; 23. Mounting cavity; 231. Receiving groove; 24. Slot; 25. Linkage component; 251. Wind receiving plate; 252. Connecting rod; 253. Pressure plate; 254. Limiting plate; 255. Elastic component; 26. Limiting groove; 3. Base; 31. Boss; 310. Placement cavity; 311. Magnetic block one; 312. Magnetic block two; 32. Connecting component; 321. Rotating rod; 3211. Slide groove; 322. Pressing plate; 323. Card plate; 324. Spring. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0033] The present invention will be further described below with reference to embodiments.

[0034] Example:

[0035] Please see Figures 1-8 This invention provides a technical solution: a dual-locking anti-drop vehicle-mounted shark fin antenna, comprising:

[0036] Shark fin shell 1;

[0037] The rotating seat 2 has a rotating cavity 21 inside, and a swinging component 22 is provided inside the rotating cavity 21. The lower surface of the rotating seat 2 has an installation cavity 23.

[0038] The base 3 is fixed to the top of the vehicle body. The upper surface of the base 3 is fixedly connected to a boss 31 that fits against the inner wall surface of the rotating cavity 21. The boss 31 is provided with a connector 32 for fixing the rotating seat 2 through a placement cavity 310 opened inside it.

[0039] The connecting member 32 includes a rotating rod 321, which is rotatably connected to the placement cavity 310 via a shaft located in its middle. The rotating rod 321 has a sliding groove 3211 inside, and there are two sliding grooves 3211. The two sliding grooves 3211 are symmetrically distributed around the shaft. A pressing plate 322 is rotatably connected inside the lower sliding groove 3211, and a locking plate 323 is rotatably connected inside the upper sliding groove 3211. A spring 324 connected to the inner wall of the placement cavity 310 is provided on the side of the pressing plate 322 near the axis of the base 3.

[0040] The placement cavity 310 is provided in a plurality of ways, and the plurality of placement cavities 310 are arranged in a circular array with the center line of the base 3 as the center.

[0041] The rotating seat 2 has a slot 24 that communicates with the rotating cavity 21. The outer surface of the pressing plate 322 passes through the placement cavity 310 and is flush with the outer surface of the boss 31. The outer surface of the card plate 323 passes through the placement cavity 310 and extends into the slot 24.

[0042] The mounting cavity 23 adopts an annular conical design. The minimum inner diameter of the mounting cavity 23 is closer to the lower side, and the inner diameter of the mounting cavity 23 gradually increases as it moves towards the top.

[0043] The swing component 22 includes a pivot 221 that passes through the interior of the shark fin shell 1. The outer end of the pivot 221 is fixedly connected to the inner wall surface of the rotating cavity 21. A connecting rod 222 is fixedly connected to the inner wall surface of the rotating cavity 21. A support rod 223 is fixedly connected to the upper surface of the connecting rod 222. A fixing block 224 is fixedly connected to the inner wall surface of the shark fin shell 1. Two fixing blocks 224 are provided and symmetrically distributed around the connecting rod 222. An arc-shaped rod 225 is fixedly connected to the upper surface of the two fixing blocks 224.

[0044] The arc-shaped rod 225 passes through the middle of the support rod 223. The outer surface of the support rod 223 is provided with a bending spring 226 connected to the upper surface of the fixing block 224. The bending spring 226 is sleeved on the outer circumference of the arc-shaped rod 225. The rotating seat 2 is provided with a linkage 25 through the receiving groove 231 opened inside it.

[0045] The linkage 25 includes a wind-receiving plate 251 that is slidably connected to the inside of the receiving groove 231. A connecting rod 252 is fixedly connected to the side of the wind-receiving plate 251 near the shark fin shell 1. A pressure plate 253 is fixedly connected to the end of the connecting rod 252 away from the wind-receiving plate 251.

[0046] The inner surface of the rotating base 2 has a limiting groove 26 that communicates with the interior of the rotating cavity 21. The lower surface of the shark fin shell 1 is slidably connected to a limiting plate 254 that fits against the top of the inner wall of the limiting groove 26. An elastic element 255 that connects to the bottom of the shark fin shell 1 is provided on the side of the limiting plate 254 near the axis of the rotating base 2. The elastic element 255 is preferably a bending leaf spring.

[0047] There are two receiving slots 231, which are located on the left and right sides of the shark fin shell 1 in the rotating seat 2. The limiting plate 254 extends to the upper surface of the shark fin shell 1 and fits against the lower surface of the limiting slot 26. The outer surface of the limiting plate 254 is always in contact with the side of the pressing plate 253 away from the connecting rod 252.

[0048] The outer surface of the shark fin shell 1 is provided with a flexible membrane 11 that connects to the upper surface of the rotating base 2. The function of the flexible membrane 11 is to seal the connection between the shark fin shell 1 and the rotating base 2, preventing rainwater and dust from entering the rotating cavity 21. A magnetic block 311 is embedded on the upper surface of the boss 31, and a magnetic block 312 is embedded inside the rotating base 2.

[0049] The process of fixing base 3:

[0050] Place the base 3 in the preset installation position on the top of the vehicle body. The preset position on the top of the vehicle body has bolt holes. The lower surface of the base 3 is fixedly connected to the bolts. The bolts under the base 3 pass through the roof and enter the interior of the vehicle body. The base 3 is locked and fixed by the bolts to ensure that the base 3 is installed firmly and without any looseness. After fixing, check the level of the base 3 to ensure that the boss 31 is in a horizontal state.

[0051] Installation status of shark fin shell 1 and rotating base 2:

[0052] The rotating shaft 221 inside the shark fin shell 1 is fixedly connected to the inner wall of the rotating cavity 21 of the rotating seat 2, ensuring that the shark fin shell 1 can swing around the rotating shaft 221 relative to the rotating seat 2; the arc-shaped rod 225 is fixed between two fixed blocks 224 on the inner wall of the shark fin shell 1, the outer surface of the arc-shaped rod 225 passes through the support rod 223, and the bending spring 226 is sleeved on the arc-shaped rod 225 and connected to the fixed blocks 224, and is in a natural extension and contraction state. At this time, the lower surfaces of the two fixed blocks 224 are parallel to the lower surface of the base 3.

[0053] Under the elastic force of the elastic member 255, the outer surface of the limiting plate 254 at the bottom of the shark fin shell 1 protrudes from the outer surface of the shark fin shell 1 and extends into the interior of the receiving groove 231 to fit against the outer surface of the pressing plate 253. The upper surface of the part protruding from the outer side of the shark fin shell 1 fits against the top of the inner wall of the limiting groove 26.

[0054] Installation process of rotating base 2 and base 3:

[0055] Before installing the rotating seat 2, the outer surface of the pressing plate 322 is flush with the outer surface of the boss 31 under the elastic force of the spring 324. At this time, the rotating rod 321 is in a balanced state, and the outer end of the clamping plate 323 passes through the placement cavity 310 and is in a raised state.

[0056] A foolproof notch is provided on the boss 31 near the front of the shark fin shell 1 to ensure correct installation orientation. The mounting cavity 23 on the lower surface of the rotating base 2 is then aligned with the boss 31 on the base 3. Because the mounting cavity 23 adopts an annular conical design, its minimum inner diameter is closer to the lower side. Furthermore, the conical slope of the inner circumference of the boss 31 gradually narrows from a larger opening at the top to a smaller inner diameter at the bottom. During assembly, the inner wall of the mounting cavity 23 can achieve precise guidance and contact with the outer surface of the boss 31. When the rotating base 2 is pressed down, the inner wall surface of the mounting cavity 23 fits tightly against the outer surface of the boss 31. Simultaneously, the magnetic block 311 on the upper surface of the boss 31 and the magnetic block 312 inside the rotating base 2 attract each other, generating an initial attraction force to assist in positioning the rotating base 2.

[0057] Simultaneously, multiple pressing plates 322 are pressed synchronously from the outside of the boss 31 using a tool, causing the pressing plates 322 to slide horizontally inside the placement cavity 310. The pressing plates 322 move towards the axis of the base 3, reducing the space occupied by the spring 324 and compressing it. The movement of the pressing plates 322 drives the rotating rod 321 to rotate around the central axis. During this process, the pressing plates 322 slide slightly within their corresponding grooves 3211 to ensure that they always slide horizontally. As the rotating rod 321 rotates, its other end drives the locking plate 323 to move downward around its connection point with the groove 3211, causing the outer end of the locking plate 323 to move into the placement cavity 310, completing the retracted state of the connector 32.

[0058] Once the rotating base 2 is installed in place, the guide provided by the boss 31, the conical surface of the mounting cavity 23, and the anti-foolproof notch, along with the attraction of magnetic block 1 311 and magnetic block 2 312, guides the inner slot 24 of the rotating base 2 to the position of the corresponding locking plate 323. Releasing the pressing plate 322 releases the spring 324, driving the pressing plate 322 to reset away from the axis of the base 3. The reset of the pressing plate 322 causes the rotating rod 321 to rotate in the opposite direction, which in turn drives the locking plate 323 to rotate upwards, so that the outer end of the locking plate 323 is fully embedded in the slot 24. Through the locking engagement between the locking plate 323 and the slot 24, the rotating base 2 and the base 3 are initially locked together.

[0059] The shark fin antenna in its normal state:

[0060] The lower surface of the shark fin shell 1 is slidably connected to a limiting plate 254 via a slide rail. Two limiting plates 254 are provided, symmetrically distributed on the left and right sides of the shark fin shell 1. In the normal state, under the action of the elastic element 255, the outer surface of the limiting plate 254 protrudes beyond the outer surface of the shark fin shell 1. The limiting plate 254 protruding from the shark fin shell 1 is located inside the limiting groove 26. The upper surfaces of both limiting plates 254 are in contact with the top of the inner wall of the corresponding limiting groove 26, and the linkage elements 25 on both sides are in the extended state. The right limiting plate 254 can only rotate clockwise towards the right limiting groove 26, and the left limiting plate 254 can only rotate counterclockwise towards the left limiting groove 26. Under the action of the limiting groove 26 and the limiting plate 254, the shark fin shell 1 remains vertical, and the lower surface of the shark fin shell 1 is parallel to the lower surface of the base 3.

[0061] The state of the shark fin shell 1 under strong winds:

[0062] When a car is in motion, especially at high speeds, the shark fin antenna is subjected to continuous wind loads. When a crosswind begins (taking a left-side crosswind as an example), the airflow acts on the left outer surface of the shark fin shell 1 from the left side. Simultaneously, some of the airflow blows towards the wind-receiving plate 251 inside the left receiving groove 231, generating a horizontal thrust on the wind-receiving plate 251. Since the wind-receiving plate 251 is slidably connected to the inside of the receiving groove 231, under the thrust of the airflow, the wind-receiving plate 251 slides along the receiving groove 231 towards the shark fin shell 1. When the wind force is stronger than the elastic force of the elastic element 255, the sliding of the wind-receiving plate 251 drives the connecting rod 252 to move synchronously. The connecting rod 252 drives the pressure plate 253 to move towards the limiting plate 254. The pressure plate 253 presses against the limiting plate 254, compressing the elastic element 255 until the outer surface of the limiting plate 254 is flush with the outer surface of the bottom end of the shark fin shell 1.

[0063] At this time, the outer surface of the left limiting plate 254 is no longer inside the limiting groove 26, but is completely inside the rotating cavity 21. Since the right linkage 25 is not affected by the wind, the right elastic member 255 is still in the unfolded state, pushing the limiting plate 254 to remain in the right limiting groove 26 (the depth of the limiting groove 26 is much greater than the thickness of the limiting plate 254). In this state, the left linkage 25 is in the contracted state due to the crosswind and can rotate arbitrarily (clockwise and counterclockwise), while the right linkage 25 is still in the unfolded state and can only rotate in the direction of the right limiting groove 26 (clockwise). Therefore, when viewed from the rear of the vehicle, the shark fin shell 1 only swings clockwise around the pivot 221 in the rotating seat 2.

[0064] When the shark fin shell 1 rotates clockwise around the pivot 221, the two fixed blocks 224 fixed on its inner wall rotate synchronously with the shell, thereby causing the arc rod 225 fixed between the two fixed blocks 224 to swing in an arc around the pivot 221. The arc rod 225 passes through the support rod 223 on the connecting rod 222 on the inner wall of the rotating cavity 21, thus driving the support rod 223 to slide relative to the axis of the arc rod 225, and at the same time exerting a compressive effect on the bending spring 226 sleeved on the arc rod 225.

[0065] After the shark fin shell 1 swings clockwise, its windward surface changes. The left windward surface, which was originally almost perpendicular to the left crosswind direction, gradually reduces the angle between itself and the crosswind, and the effective wind-receiving area of ​​the windward surface shrinks accordingly. The left edge of the shark fin shell 1 shifts to the right, and the shell as a whole presents a tilted posture in the windward direction. The left side of the shell, which was originally facing the crosswind, no longer directly bears the impact of the strong airflow. Instead, the airflow is received by the arc-shaped side of the shell in the tilted state. The airflow will flow smoothly along the arc-shaped surface, reducing the stagnation and impact of the airflow on the shell surface.

[0066] After the shark fin outer shell 1 rotates via the swinging component 22, it effectively reduces crosswind drag and wind noise. The clockwise swing of the shark fin outer shell 1 reduces its frontal area and tilts it in the windward direction, significantly reducing the lateral thrust of crosswinds on the antenna and lowering air resistance during vehicle operation. It also prevents vortices and howling generated by direct airflow impact on the sides of the shell, reducing wind noise at high speeds. Secondly, the lateral interference force of crosswinds on the vehicle body is reduced due to the rotation adjustment of the shark fin's frontal surface, reducing the tendency for vehicle drift caused by crosswinds, especially at high speeds, thus improving vehicle handling stability and driving safety. Finally, the adjustment of the frontal surface reduces the impact of strong airflow on the shark fin outer shell 1, preventing cracking and deformation due to prolonged exposure to severe impacts. It also reduces vibration caused by airflow impacts, providing good protection for internal precision components such as the signal receiving module, ensuring the stability of the antenna signal receiving performance.

[0067] During the rotation of the shark fin shell 1, the bending spring 226 accumulates elastic restoring force. When the crosswind on the left weakens or disappears, the shark fin shell 1 returns to a vertical state with the assistance of the bending springs 226 on both sides, and its bottom end returns to being parallel to the lower surface of the base 3. When the thrust of the airflow on the left wind-receiving plate 251 is less than the elastic force of the elastic element 255, the elastic element 255 releases its elastic force to drive the left limiting plate 254 to reset. The limiting plate 254 presses against the pressure plate 253, and through the connecting rod 252, drives the wind-receiving plate 251 to reset along the receiving groove 231 away from the shark fin shell 1. The left limiting plate 254 is re-embedded in the left limiting groove 26. At the same time, the bending spring 226 releases its elastic restoring force, driving the arc rod 225 to swing in the opposite direction. Through the fixing block 224, it drives the shark fin shell 1 to rotate to the left around the pivot 221 to reset to the initial position. The support rod 223 slides in the opposite direction along the arc rod 225, and the entire mechanism returns to the initial stable state.

[0068] The process of repairing or replacing an antenna:

[0069] Using a tool, press the pressing plate 322 from the outside of the boss 31. The pressing plate 322 moves towards the axis of the base 3, simultaneously compressing the spring 324. The movement of the pressing plate 322 causes the rotating rod 321 to rotate around the central axis. The rotating rod 321 drives the locking plate 323 to rotate downwards around its connection point with the slide groove 3211, causing the outer end of the locking plate 323 to disengage from the slot 24, thus releasing the initial lock. At this point, lift the rotating seat 2 upwards to separate the rotating seat 2 from the base 3.

[0070] In summary, this shark fin antenna has the following advantages:

[0071] Advantage 1: Existing adhesive-fixed antennas are subject to long-term exposure to sunlight, rain, and wind loads, causing the adhesive layer to age and fail, leading to antenna loosening and detachment, posing a safety hazard. In this invention, the base 3 is bolted through the roof and locked in place, achieving a rigid connection to the vehicle body. The rotating seat 2 and base 3 are precisely locked together via a locking plate 323 in the connector 32 and a locking groove 24 inside the rotating seat 2, ensuring locking stability and preventing the rotating seat 2 from detaching from the base 3 in the vertical and horizontal directions. Even under extreme conditions such as high-speed driving and strong winds, the antenna remains secure, ensuring driving safety and stable signal reception.

[0072] Advantage 2: Existing antenna assembly relies on manual calibration of the direction, which is prone to assembly deviations and has low positioning accuracy and poor efficiency. The mounting cavity 23 of this invention adopts an annular conical design, combined with the conical inclined surface with a larger diameter at the bottom and a smaller diameter at the top on the inner circumference of the boss 31, to achieve precise guidance and fit between the rotating seat 2 and the base 3, eliminating the need for repeated manual adjustments. Secondly, the boss 31 is provided with a foolproof notch, which can forcibly constrain the installation direction of the rotating seat 2, completely avoiding assembly direction errors. Finally, the adsorption effect of magnetic block 1 311 and magnetic block 2 312 can help guide the slot 24 of the rotating seat 2 and the card plate 323 to accurately align. The assembly process does not require complex tools and calibration steps, significantly improving assembly efficiency and reducing labor costs in production and aftermarket.

[0073] Thirdly, most existing antennas are fixed structures, with a fixed windward surface under crosswind conditions, which easily generates significant wind resistance and eddy noise, affecting driving comfort. This invention achieves adaptive crosswind adjustment through the cooperation of the swinging component 22 and the linkage component 25. Taking left-side crosswind as an example: the crosswind drives the left-side wind-receiving plate 251 to slide, and the connecting rod 252 and the pressure plate 253 press the limiting plate 254 to release the left-side limitation; looking from the rear of the vehicle to the front, the shark fin shell 1 swings clockwise around the pivot 221, reducing the angle between the windward surface and the crosswind and shrinking the effective wind-receiving area. The shell is tilted in the windward direction, and the airflow flows smoothly along the arc-shaped surface, which not only significantly reduces crosswind resistance and wind noise, but also reduces the lateral interference of crosswind on the vehicle body and improves the vehicle's handling stability at high speeds. The reason why traditional adhesives fall off is that the wind load on the windward side of the shark fin is too large under strong winds, exceeding the bonding strength of the adhesive. This solution adjusts the angle of the windward side by swinging the shark fin shell 1, which directly reduces the wind load, greatly reduces the load-bearing pressure of the mechanical connection, and ensures the reliability of the connection structure.

[0074] Fourthly, the linkage component 25 is provided in two sets. Under normal driving conditions, the cooperation between the double-sided limiting plates 254 and the limiting grooves 26 keeps the shark fin shell 1 in a vertical state, with its lower surface parallel to the lower surface of the base 3. Moreover, the left limiting plate 254 can only rotate counterclockwise and the right limiting plate can only rotate clockwise, forming a bidirectional limiting constraint to ensure the antenna attitude is stable under normal driving conditions and maintain the optimal signal reception angle. When crosswinds are present, only the windward limiting plate is unlocked, while the other side remains locked, causing the shell to swing only in one direction and avoiding disorderly shaking. After the crosswinds disappear, the bending spring 226 and the elastic component 255 release their elastic force synchronously, driving each component to accurately reset to its initial state, thus locking the shark fin shell 1 in a vertical state.

[0075] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dual-locking anti-drop vehicle-mounted shark fin antenna, characterized in that, include: Shark fin shell (1); Rotary seat (2), the interior of the rotary seat (2) is provided with a rotating cavity (21), the interior of the rotating cavity (21) is provided with a swinging component (22), and the lower surface of the rotary seat (2) is provided with an installation cavity (23). The base (3) is fixed to the top of the vehicle body. The upper surface of the base (3) is fixedly connected to a boss (31) that fits against the inner wall surface of the rotating cavity (21). The boss (31) is provided with a connector (32) for fixing the rotating seat (2) through a placement cavity (310) opened inside it. The connecting member (32) includes a rotating rod (321), which is rotatably connected to the placement cavity (310) via a shaft located in its middle. The rotating rod (321) has a sliding groove (3211) inside. There are two sliding grooves (3211), which are symmetrically distributed around the shaft. A pressing plate (322) is rotatably connected inside the lower sliding groove (3211), and a retaining plate (323) is rotatably connected inside the upper sliding groove (3211). A spring (324) connected to the inner wall of the placement cavity (310) is provided on the side of the pressing plate (322) near the axis of the base (3). The swinging component (22) includes a pivot (221) that penetrates the interior of the shark fin shell (1). The outer end of the pivot (221) is fixedly connected to the inner wall surface of the rotating cavity (21). A connecting rod (222) is fixedly connected to the inner wall surface of the rotating cavity (21). A support rod (223) is fixedly connected to the upper surface of the connecting rod (222). A fixing block (224) is fixedly connected to the inner wall surface of the shark fin shell (1). Two fixing blocks (224) are provided and symmetrically distributed around the connecting rod (222). An arc-shaped rod (225) is fixedly connected to the upper surface of the two fixing blocks (224). The arc-shaped rod (225) penetrates the middle of the support rod (223). A bending spring (226) connected to the upper surface of the fixing block (224) is provided on the outer surface of the support rod (223). The bending spring (226) is sleeved on the arc-shaped rod. The outer circumferential surface of the rod (225) is provided with a linkage (25) through a receiving groove (231) opened inside it. The linkage (25) includes a wind receiving plate (251) that is slidably connected to the inside of the receiving groove (231). A connecting rod (252) is fixedly connected to the side of the wind receiving plate (251) near the shark fin shell (1). A pressure plate (253) is fixedly connected to the end of the connecting rod (252) away from the wind receiving plate (251). A limiting groove (26) that communicates with the inside of the rotating cavity (21) is opened on the inner surface of the rotating seat (2). A limiting plate (254) that fits against the top of the inner wall of the limiting groove (26) is slidably connected to the lower surface of the shark fin shell (1). An elastic element (255) that connects to the bottom of the shark fin shell (1) is provided on the side of the limiting plate (254) near the axis of the rotating seat (2).

2. The dual-locking anti-drop vehicle-mounted shark fin antenna according to claim 1, characterized in that: The rotating seat (2) has a slot (24) that communicates with the rotating cavity (21). The outer surface of the pressing plate (322) penetrates the placement cavity (310) and is flush with the outer surface of the boss (31). The outer surface of the card plate (323) penetrates the placement cavity (310) and extends into the slot (24).

3. The dual-locking anti-drop vehicle-mounted shark fin antenna according to claim 1, characterized in that: The mounting cavity (23) adopts an annular conical design, and the minimum value of the inner diameter of the mounting cavity (23) is close to the lower side.

4. The dual-locking anti-drop vehicle-mounted shark fin antenna according to claim 2, characterized in that: The outer surface of the shark fin shell (1) is provided with a flexible membrane (11) connected to the upper surface of the rotating seat (2), the upper surface of the boss (31) is embedded with a magnetic block one (311), and the interior of the rotating seat (2) is embedded with a magnetic block two (312).

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