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

Abstract

The invention 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 cavity is formed in the rotating seat, a swinging part is arranged in the rotating cavity, and a mounting cavity is formed in the lower surface of the rotating seat; and the base is fixed at the top of the vehicle body. The double-locking type anti-falling vehicle-mounted shark fin antenna can effectively solve the problems that in the prior art, a shark fin antenna shell is usually adhered to the top of a vehicle body through glue, the shark fin antenna shell and a vehicle roof are attached and fixed through the viscosity of the glue, and the service life of the shark fin antenna shell is prolonged. However, an automobile is frequently exposed to the sun, washed by rainwater and suddenly-changed outdoor environment in the long-term driving process, colloid is gradually aged, hardened and attenuated in viscosity, after a shark fin antenna is used for a period of time, the edge of the shark fin antenna is very easy to tilt, and when the shark fin antenna encounters strong wind load scenes such as strong wind, high-speed driving and the like, the edge of the shark fin antenna is very difficult to tilt. And even, the problem of direct falling off can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle-mounted antennas, in particular to a double locking type anti-falling vehicle-mounted shark fin antenna. BACKGROUND

[0002] The shark fin antenna is a streamlined antenna installed on the roof of a car, and is named because its appearance is similar to the dorsal fin of a shark. Its core function is to act as a vehicle-mounted antenna that can receive and enhance FM / AM broadcast, GPS navigation, 4G / 5G network signals. At the same time, the streamlined design can reduce wind resistance and wind noise, improve fuel economy and driving stability, and also has the safety function of preventing static electricity.

[0003] In the prior art, the shell of the shark fin antenna is usually glued to the top of the vehicle body, and the shark fin antenna shell is fixed to the roof by the adhesion of the glue. However, the vehicle will frequently experience outdoor environments such as sun exposure, rain washing, and temperature changes during long-term driving. The glue will gradually age, harden and lose adhesion. After the shark fin antenna is used for a period of time, the edge is prone to lift. When encountering strong wind, high-speed driving and other strong wind load scenarios, it will directly fall off. SUMMARY

[0004] In view of the above shortcomings of the prior art, the present application provides a double locking type anti-falling vehicle-mounted shark fin antenna, which can effectively solve the problem that in the prior art, the shell of the shark fin antenna is usually glued to the top of the vehicle body, and the shark fin antenna shell is fixed to the roof by the adhesion of the glue. However, the vehicle will frequently experience outdoor environments such as sun exposure, rain washing, and temperature changes during long-term driving. The glue will gradually age, harden and lose adhesion. After the shark fin antenna is used for a period of time, the edge is prone to lift. When encountering strong wind, high-speed driving and other strong wind load scenarios, it will directly fall off.

[0005] To achieve the above purpose, the present application is realized by the following technical scheme:

[0006] The present application provides a double locking type anti-falling vehicle-mounted shark fin antenna, comprising:

[0007] A shark fin shell;

[0008] A rotating seat, a rotating cavity is formed in the interior of the rotating seat, a swing piece is arranged in the interior of the rotating cavity, and an installation cavity is formed in the lower surface of the rotating seat;

[0009] A base is fixed to the top of the vehicle body, a boss is fixedly connected to the upper surface of the base and is in close contact with the inner wall surface of the rotating cavity, and the boss is provided with a connecting piece for fixing the rotating seat through a placing cavity formed in the interior thereof;

[0010] The connecting piece comprises a rotating rod, the rotating rod is rotationally connected with the inside of the placing cavity through a shaft rod arranged in the middle part, the inside of the rotating rod is provided with a sliding groove, the two sliding grooves are symmetrically distributed with the shaft rod as the center, one sliding groove at the lower side is rotationally connected with a pressing plate, one sliding groove at the upper side is rotationally connected with a clamping plate, the side of the pressing plate close to the shaft center line of the base is provided with a spring connected with the inner wall of the placing cavity.

[0011] The placing cavity is provided with a plurality of placing cavities, the plurality of placing cavities are circumferentially arranged with the shaft center line of the base as the center, the inside of the boss is provided with an anti-fooling notch.

[0012] Further, the inside of the rotating seat is provided with a clamping groove in communication with the rotating cavity, the outer surface of the pressing plate penetrates the placing cavity and is flush with the outer surface of the boss, and the outer surface of the clamping plate penetrates the placing cavity and extends into the inside of the clamping groove.

[0013] Further, the installation cavity is designed in a ring shape and a taper shape, and the minimum value of the inner diameter of the installation cavity is close to the side at the lower side.

[0014] Further, the swinging piece comprises a rotating shaft penetrating the inside of the shark fin shell, the outer end of the rotating shaft is fixedly connected with the inner wall surface of the rotating cavity, the inner wall surface of the rotating cavity is fixedly connected with a connecting rod, the upper surface of the connecting rod is fixedly connected with a supporting rod, the inner wall surface of the shark fin shell is fixedly connected with a fixed block, the fixed block is provided with two fixed blocks and is symmetrically distributed along the connecting rod, and the upper surfaces of the two fixed blocks are fixedly connected with an arc-shaped rod.

[0015] Further, the arc-shaped rod penetrates the middle part of the supporting rod, the outer surface of the supporting rod is provided with a bent spring connected with the upper surface of the fixed block, the bent spring is sleeved on the circumferential outer surface of the arc-shaped rod, and the rotating seat is provided with a linkage piece through an accommodating groove arranged in the inside thereof.

[0016] Further, the linkage piece comprises a wind-receiving plate in sliding connection with the inside of the accommodating groove, the side of the wind-receiving plate close to the shark fin shell is fixedly connected with a connecting rod, and the end of the connecting rod away from the wind-receiving plate is fixedly connected with a pressing plate.

[0017] Further, the inner surface of the rotating seat is provided with a limiting groove in communication with the inside of the rotating cavity, the lower surface of the shark fin shell is slidingly connected with a limiting plate abutting against the top end of the inner wall of the limiting groove, and the side of the limiting plate close to the shaft center line of the rotating seat is provided with an elastic piece connected with the bottom of the shark fin shell.

[0018] Further, the accommodating grooves are arranged in two, and the two accommodating grooves are arranged 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 part and is attached to the lower surface of the limiting groove, and the outer surface of the limiting plate is always attached to the side of the pressing plate away from the connecting rod

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

[0020] The technical scheme provided by the present application has the following beneficial effects compared with the prior art:

[0021] The base of the present application is locked and fixed by penetrating the roof through bolts, realizing rigid connection with the vehicle body; the rotating seat is locked by precise clamping of the clamping plate in the connecting piece and the clamping groove in the rotating seat, realizing the stability of the locking, avoiding the rotating seat from falling off the base in the vertical and horizontal directions, avoiding the antenna from falling off even in extreme working conditions such as high-speed driving and strong wind impact, ensuring driving safety and stable signal receiving function. In the normal driving state of the vehicle, the cooperation of the double-sided limiting plates and the limiting grooves makes the shark fin shell maintain a vertical state, and its lower surface is parallel to the lower surface of the base; and the left limiting plate can only rotate counterclockwise, and the right limiting plate can only rotate clockwise, forming bidirectional limiting constraint, ensuring stable antenna posture and maintaining optimal signal receiving angle in normal driving conditions. When the side wind acts, only the windward side limiting is unlocked, and the other side remains locked, so that the shell swings only in a single direction, avoiding disorderly shaking; after the side wind disappears, the spring and the elastic member release the elastic force synchronously, driving each component to reset to the initial state precisely, realizing the locking of the shark fin shell in the vertical state, ensuring stability while ensuring the receiving signal angle to be in the optimal state. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.

[0023] Figure 1 The present application provides a three-dimensional structure schematic diagram of the embodiment;

[0024] Figure 2Structure schematic view of shark fin shell, rotating shaft and base mounted on roof of vehicle for embodiment of the present application;

[0025] Figure 3 Structure schematic view of separation of shark fin shell, rotating shaft and base for embodiment of the present application;

[0026] Figure 4 Structure schematic view of separation of shark fin shell, rotating shaft and base from another angle for embodiment of the present application;

[0027] Figure 5 Structure schematic view of cross section of shark fin shell, flexible film and rotating shaft for embodiment of the present application;

[0028] Figure 6 Structure schematic view of embodiment of the present application Figure 5 Structure schematic view of local amplification at A for embodiment of the present application;

[0029] Figure 7 Structure schematic view of cross section of shark fin shell, rotating seat, linkage and swing for embodiment of the present application;

[0030] Figure 8 Structure schematic view of bottom perspective view of shark fin shell and linkage for embodiment of the present application.

[0031] The reference signs in the drawings represent: 1, shark fin shell; 11, flexible film; 2, rotating seat; 21, rotating cavity; 22, swing; 221, rotating shaft; 222, connecting rod; 223, support rod; 224, fixed block; 225, arc-shaped rod; 226, bent spring; 23, mounting cavity; 231, containing groove; 24, clamping groove; 25, linkage; 251, wind-receiving plate; 252, connecting rod; 253, pressing plate; 254, limiting plate; 255, elastic member; 26, limiting groove; 3, base; 31, boss; 310, placing cavity; 311, magnetic block one; 312, magnetic block two; 32, connecting member; 321, rotating rod; 3211, sliding groove; 322, pressing plate; 323, clamping plate; 324, spring. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0033] The present application will be further described below in combination with the embodiments.

[0034] Embodiment:

[0035] Referring to Figures 1-8 The application provides a technical scheme: a double-locking type anti-falling vehicle-mounted shark fin antenna, comprising:

[0036] A shark fin shell 1;

[0037] A rotating seat 2, a rotating cavity 21 is formed in the rotating seat 2, and a swing piece 22 is arranged in the rotating cavity 21; a mounting cavity 23 is formed in the lower surface of the rotating seat 2;

[0038] A base 3 is fixed to the top of the vehicle body, and a convex table 31 that is in close contact with the inner wall surface of the rotating cavity 21 is fixedly connected to the upper surface of the base 3; the convex table 31 is provided with a connecting piece 32 for fixing the rotating seat 2 through a placing cavity 310 formed in the convex table 31;

[0039] The connecting piece 32 comprises a rotating rod 321, the rotating rod 321 is rotationally connected to the inside of the placing cavity 310 through a shaft arranged at the middle part of the rotating rod 321, a sliding groove 3211 is formed in the inside of the rotating rod 321, two sliding grooves 3211 are symmetrically distributed with the shaft as the center, a pressing plate 322 is rotationally connected to the inside of the lower sliding groove 3211, a clamping plate 323 is rotationally connected to the inside of the upper sliding groove 3211, and a spring 324 that is connected to the inner wall of the placing cavity 310 is arranged on the side of the pressing plate 322 close to the axis of the base 3.

[0040] The placing cavity 310 is arranged in plurality, and the plurality of placing cavities 310 are circularly arrayed with the axis of the base 3 as the center.

[0041] The inside of the rotating seat 2 is provided with a clamping groove 24 that is in communication with the rotating cavity 21, the outer surface of the pressing plate 322 penetrates the placing cavity 310 and is flush with the outer surface of the convex table 31, and the outer surface of the clamping plate 323 penetrates the placing cavity 310 and extends to the inside of the clamping groove 24.

[0042] The mounting cavity 23 is designed in a ring shape and a taper shape, the minimum value of the inner diameter of the mounting cavity 23 is close to the lower side, and the inner diameter of the mounting cavity 23 gradually increases as it is closer to the upper side.

[0043] The swing piece 22 comprises a rotating shaft 221 that penetrates the inside of the shark fin shell 1, the outer end of the rotating shaft 221 is fixedly connected to the inner wall surface of the rotating cavity 21, the inner wall surface of the rotating cavity 21 is fixedly connected with a connecting rod 222, the upper surface of the connecting rod 222 is fixedly connected with a supporting rod 223, the inner wall surface of the shark fin shell 1 is fixedly connected with a fixed block 224, the fixed block 224 is arranged in two and symmetrically distributed along the connecting rod 222, and the upper surfaces of the two fixed blocks 224 are fixedly connected with an arc-shaped rod 225.

[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] Two receiving slots 231 are provided, which are opened 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 swivel 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 double-locked anti-drop vehicle-mounted shark fin antenna, characterized in that, Include: Shark fin shell (1); Rotary seat (2), the inside of the rotary seat (2) is provided with a rotating cavity (21), the inside of the rotating cavity (21) is provided with a swing piece (22), the lower surface of the rotary seat (2) is provided with a mounting cavity (23); Base (3), the base (3) is fixed on the top of the vehicle body, the upper surface of the base (3) is fixedly connected with the convex platform (31) which is in close contact with the inner wall surface of the rotating cavity (21), the convex platform (31) is provided with a connecting piece (32) for fixing the rotary seat (2) through the placing cavity (310) opened in the inside thereof; Wherein, the connecting piece (32) includes a rotating rod (321), the rotating rod (321) is rotatably connected with the inside of the placing cavity (310) through the shaft rod arranged in the middle part thereof, the inside of the rotating rod (321) is provided with a sliding groove (3211), the sliding groove (3211) is provided with two, the two sliding grooves (3211) are symmetrically distributed with the shaft rod as the center, the inside of the lower one of the sliding grooves (3211) is rotatably connected with a pressing plate (322), the inside of the upper one of the sliding grooves (3211) is rotatably connected with a clamping plate (323), the side of the pressing plate (322) close to the axis of the base (3) is provided with a spring (324) connected with the inner wall of the placing cavity (310).

2. The dual locking anti-drop shark-fin antenna for vehicle according to claim 1, characterized in that: The inside of the rotary seat (2) is provided with a clamping groove (24) in communication with the rotating cavity (21), the outer surface of the pressing plate (322) penetrates the placing cavity (310) and is flush with the outer surface of the convex platform (31), the outer surface of the clamping plate (323) penetrates the placing cavity (310) and extends into the inside of the clamping groove (24).

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

4. The dual locking anti-drop shark-fin antenna for vehicle according to claim 2, characterized in that: The swing piece (22) includes a rotating shaft (221) penetrating the inside of the shark fin shell (1), the outer end of the rotating shaft (221) is fixedly connected with the inner wall surface of the rotating cavity (21), the inner wall surface of the rotating cavity (21) is fixedly connected with a connecting rod (222), the upper surface of the connecting rod (222) is fixedly connected with a support rod (223), the inner wall surface of the shark fin shell (1) is fixedly connected with a fixed block (224), the fixed block (224) is provided with two and symmetrically distributed along the connecting rod (222), the upper surfaces of the two fixed blocks (224) are fixedly connected with an arc-shaped rod (225) in common.

5. The dual locking anti-drop shark-fin antenna for vehicle according to claim 4, characterized in that: The arc-shaped rod (225) penetrates the middle part of the support rod (223), the outer surface of the support rod (223) is provided with a bent spring (226) connected with the upper surface of the fixed block (224), the bent spring (226) is sleeved on the circumferential outer surface of the arc-shaped rod (225), the rotary seat (2) is provided with a linkage piece (25) through the accommodating groove (231) opened in the inside thereof.

6. The dual locking anti-drop shark-fin antenna for vehicle according to claim 5, characterized in that: The linkage (25) comprises a wind receiving plate (251) slidably connected inside the accommodating groove (231), and the wind receiving plate (251) is fixedly connected with a connecting rod (252) near one side of the shark fin shell (1), and one end of the connecting rod (252) away from the wind receiving plate (251) is fixedly connected with a pressing plate (253).

7. The dual locking anti-drop shark-fin antenna for vehicle according to claim 6, characterized in that: The inner surface of the rotating seat (2) is provided with a limiting groove (26) in communication with the inside of the rotating cavity (21), and the lower surface of the shark fin shell (1) is slidably connected with a limiting plate (254) abutting against the top end of the inner wall of the limiting groove (26), and the limiting plate (254) is provided with an elastic member (255) connected with the bottom of the shark fin shell (1) near the axis line of the rotating seat (2).

8. The dual locking anti-drop shark-fin antenna for vehicle according to claim 7, characterized in that: The outer surface of the shark fin shell (1) is provided with a flexible film (11) connected with 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 inside of the rotating seat (2) is embedded with a magnetic block two (312).

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