Waterproof onboard antenna

Abstract

The utility model relates to the field of onboard antennas, in particular to a waterproof onboard antenna, which comprises a protective shell, the protective shell comprises a protective bottom shell and a protective top shell, a humidifying plate is arranged outside the protective shell, a water passing plate is arranged between the humidifying plate and the protective shell, a circuit board is arranged inside the protective shell, and the circuit board is connected with the protective bottom shell. A radiator is arranged outside the circuit board, a sealing film is arranged outside the radiator, and an expansion layer is arranged between the sealing film and the protective shell. According to the utility model, the expansion layer and the sealing film are arranged to form a dual protection system, so that the waterproof capability of the onboard antenna is greatly improved. In a humid environment, moisture can be effectively prevented from permeating into the protection shell, the circuit board is protected from being damaged by moisture, it is ensured that the circuit board can stably operate under various severe humid conditions, the circuit fault risk caused by moisture is reduced, and the service life of the whole antenna is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of onboard antennas, specifically to a waterproof onboard antenna. Background Technology

[0002] A Chinese patent proposes an onboard antenna (application number: CN202220157075.0), which includes a radiator, a transmission line, a matching unit, and an assembly printed circuit board. The radiator is connected to the matching unit via the transmission line, and the matching unit is connected to the assembly printed circuit board. The radiator is elliptical with a major axis of 20±5 mm and a minor axis of 10±3 mm, and an arc-shaped slot is formed on the radiator. The center of the slot is located at the intersection of the major and minor axes of the radiator, and the slot is symmetrical along the minor axis. This onboard antenna, with the slot in the middle, provides a wider frequency band. Compared with the prior art, it has a smaller antenna size and a wider frequency band.

[0003] Existing structures of this type employ a single sealing method, such as rubber rings or sealant, for waterproofing. However, these methods are prone to aging and failure during long-term use, failing to meet the waterproofing requirements of complex environments. Therefore, a waterproof onboard antenna with a reasonable structure, strong sealing performance, and adaptive expansion function is needed to improve its reliability and stability in harsh environments. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a waterproof onboard antenna.

[0005] The technical solution of this utility model is as follows:

[0006] This utility model provides a waterproof onboard antenna, including a protective shell. The protective shell includes a protective bottom shell and a protective top shell. A humidifying plate is disposed on the outside of the protective shell. A water-permeable plate is disposed between the humidifying plate and the protective shell. A circuit board is disposed inside the protective shell. A radiator is disposed outside the circuit board. A sealing film is disposed outside the radiator. An expansion layer is disposed between the sealing film and the protective shell.

[0007] Optionally, a processing groove is provided between the protective bottom shell and the protective top shell, and an external connection hole communicating with the processing groove is provided on the outside of the protective top shell. The radiator is located inside the external connection hole, and the protective bottom shell and the protective top shell are fixedly connected by screws.

[0008] Optionally, the water-passing plate has two sections that are respectively connected to the protective top shell and the protective bottom shell. The water-passing plate passes through the interior of the protective shell and is connected to the humidifying plate. The water-passing plate has evenly distributed water-passing holes on its exterior.

[0009] Optionally, the humidifying plate has multiple storage blocks inside for storing water, and a pressing block is provided on the outside of the humidifying plate to regulate water release. An isolation film is provided between the humidifying plate and the water-passing plate.

[0010] Optionally, the circuit board is covered with a granular anti-slip pad, and the protective shell is fixedly connected with an abutment block that contacts the circuit board.

[0011] Optionally, the radiator is fixedly connected to the circuit board, and a matching device is also provided on the outside of the circuit board. The matching device and the radiator are electrically connected through a transmission line.

[0012] Optionally, the circuit board is wrapped with a sealing film, and the expansion layer is wrapped around the outer layer of the sealing film.

[0013] The beneficial effects achieved by this utility model are as follows:

[0014] This invention utilizes a dual protection system consisting of an expansion layer and a sealing film to significantly improve the waterproof capability of the onboard antenna. In humid environments, it effectively prevents moisture from penetrating the protective shell, protecting the circuit board from moisture damage and ensuring stable operation under various harsh humid conditions. This reduces the risk of circuit failures caused by moisture and extends the overall lifespan of the antenna.

[0015] This invention employs a screw-fixed connection for the protective shell, combined with an internal expansion layer, to make the entire onboard antenna structure more stable. During antenna use, it can effectively resist external forces such as vibration and impact, avoiding sealing failure or damage to other components due to structural loosening, thus ensuring the stability and reliability of the antenna in various complex working environments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the circuit board's connection structure;

[0019] Figure 4 yes Figure 2 A magnified schematic diagram of part A in the middle.

[0020] In the diagram, 1 is the protective shell; 1A is the protective bottom shell; 1B is the protective top shell; 101 is the processing tank; 103 is the external connection hole; 2 is the humidifying plate; 201 is the storage block; 3 is the contact block; 4 is the circuit board; 401 is the connection groove; 5 is the radiator; 501 is the transmission box; 502 is the matching device; 6 is the sealing film; and 7 is the expansion layer. Detailed Implementation

[0021] To facilitate understanding of this utility model by those skilled in the art, the specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0022] Example 1

[0023] like Figure 1-4 As shown, this utility model provides a waterproof onboard antenna, including a protective shell 1. The protective shell 1 includes a protective bottom shell 1A and a protective top shell 1B. A humidifying plate 2 is provided on the outside of the protective shell 1. A water-permeable plate is provided between the humidifying plate 2 and the protective shell 1. A circuit board 4 is provided inside the protective shell 1. A radiator 5 is provided on the outside of the circuit board 4. A sealing film 6 is provided on the outside of the radiator 5. An expansion layer 7 is provided between the sealing film 6 and the protective shell 1.

[0024] This invention utilizes a dual-protection system consisting of an expansion layer 7 and a sealing film 6, significantly improving the waterproof capability of the onboard antenna. In humid environments, it effectively prevents moisture from seeping into the protective shell 1, protecting the circuit board 4 from moisture damage and ensuring stable operation under various harsh humid conditions. This reduces the risk of circuit failures due to moisture and extends the overall lifespan of the antenna. The screw-fixed connection of the protective shell 1, combined with the internal expansion layer 7, makes the entire onboard antenna structure more robust. During antenna use, it effectively resists external vibrations, impacts, and other forces, preventing seal failures or damage to other components due to structural loosening, thus ensuring the antenna's stability and reliability in various complex working environments.

[0025] Example 2

[0026] like Figure 1-3 As shown, a processing groove 101 is provided between the protective bottom shell 1A and the protective top shell 1B. An external connection hole 103 communicating with the processing groove 101 is provided on the outside of the protective top shell 1B. The radiator 5 is located inside the external connection hole 103. The protective bottom shell 1A and the protective top shell 1B are fixedly connected by screws.

[0027] Specifically, the processing slot 101 is used to control and facilitate the storage of objects, and the external connection hole 103 is used to prevent interference with the signals emitted and received by the radiator 5.

[0028] In this embodiment, there are two water-passing plates that are respectively connected to the protective top shell 1B and the protective bottom shell 1A. The water-passing plates pass through the interior of the protective shell 1 and are connected to the humidifying plate 2. The water-passing plates have evenly distributed water-passing holes on their exterior.

[0029] Specifically, the external water passage design of the water-passing plate can effectively guide the water flow, making it convenient for the water source to be introduced into the protective shell 1 at the humidifying plate 2.

[0030] In this embodiment, the humidifying plate 2 is provided with multiple storage blocks 201 inside for storing water, and a pressing block is provided on the outside of the humidifying plate 2 to regulate water release. An isolation film is provided between the humidifying plate 2 and the water-passing plate.

[0031] Specifically, when the clamping plate is pressed, the waterproof membrane breaks, thereby allowing water to enter the interior of the protective shell 1.

[0032] In this embodiment, the outside of the circuit board 4 is covered with a granular anti-slip pad, and the inside of the protective shell 1 is fixedly connected with an abutment block 3 that contacts the circuit board 4.

[0033] By contacting the contact block 3 with the circuit board 4, the circuit board 4 can be initially fixed to prevent it from moving inside the protective shell 1.

[0034] In this embodiment, the radiator 5 is fixedly connected to the circuit board 4, and a matching device 502 is also provided on the outside of the circuit board 4. The matching device 502 and the radiator 5 are electrically connected through a transmission line.

[0035] Specifically, the matcher 502 is used to optimize signal transmission efficiency and ensure signal stability between the radiator 5 and the circuit board 4.

[0036] Example 3

[0037] like Figure 2-4 As shown, the circuit board 4 is wrapped with a sealing film 6, and the expansion layer 7 is wrapped around the outer layer of the sealing film 6.

[0038] Specifically, the expansion layer 7, after expanding upon contact with water, effectively fills the gap between the sealing membrane 6 and the protective shell 1. The encapsulation layer within it is based on natural rubber, synthetic rubber, or thermoplastic elastomer. A hydrophilic polymer is added as an expansion agent; after the natural rubber expands, it expands the internal space, achieving internal waterproofing.

[0039] In summary, the protective shell 1 provided in this application can effectively protect the internal circuit board 4. The expansion layer 7 and the sealing film 6 provide double protection, ensuring that the circuit board 4 can operate stably in a humid environment. During installation, the protective shell 1 is fixedly connected with screws to ensure structural stability. After water is injected into the protective shell 1, the expansion layer 7 of the humidifying plate 2 expands and fills the gaps, achieving expansion and stabilization of the sealing plate while also providing waterproofing.

[0040] The embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A waterproof onboard antenna, characterized in that: The protective shell (1) includes a protective bottom shell (1A) and a protective top shell (1B). A humidifying plate (2) is provided on the outside of the protective shell (1). A water-passing plate is provided between the humidifying plate (2) and the protective shell (1). A circuit board (4) is provided inside the protective shell (1). A radiator (5) is provided on the outside of the circuit board (4). A sealing film (6) is provided on the outside of the radiator (5). An expansion layer (7) is provided between the sealing film (6) and the protective shell (1).

2. The waterproof onboard antenna according to claim 1, characterized in that: A processing groove (101) is provided between the protective bottom shell (1A) and the protective top shell (1B). An external connection hole (103) communicating with the processing groove (101) is provided on the outside of the protective top shell (1B). The radiator (5) is located inside the external connection hole (103). The protective bottom shell (1A) and the protective top shell (1B) are fixedly connected by screws.

3. A waterproof onboard antenna according to claim 1, characterized in that: The water-passing plate is provided with two connections to the protective top shell (1B) and the protective bottom shell (1A) respectively. The water-passing plate passes through the interior of the protective shell (1) and is connected to the humidifying plate (2). The water-passing plate has evenly distributed water-passing holes on its exterior.

4. A waterproof onboard antenna according to claim 1, characterized in that: The humidifying plate (2) has multiple storage blocks (201) inside for storing water. The humidifying plate (2) has a pressing block on the outside for adjusting water release. An isolation film is provided between the humidifying plate (2) and the water-passing plate.

5. A waterproof onboard antenna according to claim 1, characterized in that: The circuit board (4) is covered with a granular anti-slip pad, and the protective shell (1) is fixedly connected with an abutment block (3) that contacts the circuit board (4).

6. A waterproof onboard antenna according to claim 1, characterized in that: The radiator (5) is fixedly connected to the circuit board (4), and a matching device (502) is also provided on the outside of the circuit board (4). The matching device (502) and the radiator (5) are electrically connected through a transmission line.

7. A waterproof onboard antenna according to claim 1, characterized in that: The circuit board (4) is wrapped with a sealing film (6), and the expansion layer (7) is wrapped around the outer layer of the sealing film (6).

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