Waterproof and breathable installation cap structure

Abstract

The utility model discloses a waterproof and ventilative installation cap structure, include: cap body, the annular hollow fixed ring that is equipped with in cap body top, the fixed ring bottom inside is equipped with the screw portion, hollow cylinder, hollow cylinder top is equipped with the installation portion, and the installation portion is fixed in the fixed ring bottom through the screw portion, hollow cylinder inside is equipped with the step ventilative membrane group, and the step ventilative membrane group includes the first ventilative membrane, the second ventilative membrane and the third ventilative membrane that set gradually from top to bottom, the density of first ventilative membrane is less than the density of second ventilative membrane, and the density of second ventilative membrane is less than the density of third ventilative membrane. The utility model discloses through multilayer gradient density design has realized to the efficient grading filtration of water vapor and pollutant, and simultaneously screw connection cooperation sealing ring has guaranteed the overall tightness, has the advantages such as compact structure, reliable installation, high protection level, is applicable to the device such as car light that needs waterproof and ventilative.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts, specifically, it relates to a waterproof and breathable mounting cap structure. Background Technology

[0002] In automotive electronics, sensors, and other equipment, waterproof and breathable mounting caps are crucial components for ensuring the stable operation of internal elements. They must simultaneously prevent moisture and dust intrusion while balancing the internal and external air pressure. Existing mounting caps mostly use single-density breathable membranes. If waterproofing is prioritized, breathability is low, easily leading to condensation due to internal temperature and pressure imbalances; if breathability is prioritized, the protection level is insufficient, allowing liquid water and impurities to easily intrude and damage components. While some products employ multi-membrane structures, the membrane density distribution is unreasonable, resulting in poor synergy between filtration and breathability. Furthermore, traditional mounting structures lack reliable sealing, and long-term use can lead to loosening and gaps due to vibration. These problems increase equipment failure rates and shorten lifespan, especially in complex operating conditions such as automotive drive modules and ADAS sensors, where existing mounting caps are insufficient to meet the dual requirements of high protection and high breathability. Utility Model Content

[0003] In view of this, the technical problem to be solved by this utility model is to provide a waterproof and breathable mounting cap structure to address the reliability issues of devices such as car lights, which are prone to clogging and poor sealing due to a single breathable membrane, resulting in decreased breathability and leakage.

[0004] To solve the above-mentioned technical problems, this utility model discloses a waterproof and breathable installation cap structure, including: a cap body, with a ring-shaped hollow fixing ring at the top of the cap body, and a threaded part on the inner side of the bottom of the fixing ring; a hollow cylinder, with an installation part at the top of the hollow cylinder, the installation part being fixed to the bottom of the fixing ring by the threaded part; a stepped breathable membrane assembly is provided inside the hollow cylinder, the stepped breathable membrane assembly including a first breathable membrane, a second breathable membrane, and a third breathable membrane arranged sequentially from top to bottom; the density of the first breathable membrane is less than the density of the second breathable membrane, and the density of the second breathable membrane is less than the density of the third breathable membrane.

[0005] According to one embodiment of the present invention, the fixing ring is provided at a certain distance from the periphery of the cap body.

[0006] According to one embodiment of the present invention, the mounting part is integrally formed with the hollow cylinder, and its outer wall is provided with an external thread that matches the threaded part. A sealing ring is also fitted at the bottom of the mounting part.

[0007] According to one embodiment of the present invention, the inner wall of the hollow cylinder is provided with a first annular retaining platform, a second annular retaining platform, and a third annular retaining platform at the positions corresponding to the first breathable membrane, the second breathable membrane, and the third breathable membrane, respectively, for supporting and fixing each layer of breathable membrane.

[0008] According to one embodiment of the present invention, the density of the first breathable membrane is 0.1-0.3 g / cm³. 3 The density of the second breathable membrane is 0.4-0.6 g / cm³. 3 The density of the third breathable membrane is 0.7-0.9 g / cm³. 3 .

[0009] Compared with the prior art, the present invention can achieve the following technical effects: The multi-layer gradient density design achieves efficient graded filtration of water vapor and pollutants, while the threaded connection and sealing ring ensure overall airtightness. It has the advantages of compact structure, reliable installation and high protection level, and is suitable for devices such as vehicle lights that require waterproof and breathable technology.

[0010] Of course, any product implementing this utility model does not necessarily need to achieve all of the above technical effects at the same time. Attached Figure Description

[0011] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the waterproof and breathable mounting cap structure according to an embodiment of the present utility model.

[0012] Attached Figure Labels

[0013] The cap body 10, the fixing ring 20, the threaded part 30, the mounting part 40, the stepped breathable membrane group 50, the first breathable membrane 60, the second breathable membrane 70, and the third breathable membrane 80. Detailed Implementation

[0014] The following will describe in detail the implementation of this utility model with reference to the accompanying drawings and embodiments, so that the implementation of this utility model can be fully understood and carried out based on how technical means are used to solve technical problems and achieve technical effects.

[0015] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the waterproof and breathable installation cap structure according to an embodiment of the present invention. As shown in the figure, a waterproof and breathable installation cap structure includes: a cap body, with an annular hollow fixing ring at the top of the cap body, the fixing ring being at a certain distance from the perimeter of the cap body; a threaded portion on the inner side of the bottom of the fixing ring; a hollow cylinder, with an installation portion at the top of the hollow cylinder, the installation portion being fixed to the bottom of the fixing ring by the threaded portion, the installation portion being integrally formed with the hollow cylinder, its outer wall having an external thread matching the threaded portion, and a sealing ring being fitted at the bottom of the installation portion.

[0016] In one embodiment of this utility model, the waterproof and breathable cap structure mainly consists of a cap body and a hollow cylinder. The cap body has an annular, hollowed-out fixing ring at its top, maintaining a certain distance from the inner circumferential wall of the cap body. This design creates an annular airflow channel around the fixing ring, ensuring smooth air circulation. A threaded portion is machined on the inner bottom of the fixing ring. The hollow cylinder has an installation portion at its top, which is integrally formed with the hollow cylinder. Its outer wall is machined with external threads matching the aforementioned threaded portion. The hollow cylinder is securely and detachably fixed to the bottom of the fixing ring by screwing the threads together. Simultaneously, a sealing ring is fitted at the bottom of the installation portion. The key function of this combined structure is that the threaded connection provides the strength and reliability of the mechanical connection, ensuring the overall structural stability. The sealing ring, after the threads are tightened, undergoes elastic deformation, effectively filling the microscopic gap between the installation portion and the fixing ring, forming a reliable sealing barrier together with the threaded pair. This achieves a secure installation while preventing moisture from seeping in from the connection point, providing a stable sealing environment for the operation of the internal breathable membrane assembly.

[0017] Furthermore, the hollow cylinder is equipped with a stepped air-permeable membrane assembly, which includes a first air-permeable membrane, a second air-permeable membrane, and a third air-permeable membrane arranged sequentially from top to bottom; the density of the first air-permeable membrane is less than the density of the second air-permeable membrane, the density of the second air-permeable membrane is less than the density of the third air-permeable membrane, the density of the first air-permeable membrane is 0.1-0.3 g / cm3, the density of the second air-permeable membrane is 0.4-0.6 g / cm3, and the density of the third air-permeable membrane is 0.7-0.9 g / cm3.

[0018] In detail, the hollow cylinder's core contains a stepped permeable membrane assembly. This assembly consists of a first, second, and third permeable membrane stacked sequentially from top to bottom, with their physical densities increasing in a precise gradient. Specifically, the density of the first permeable membrane is 0.1-0.3 g / cm³, the second is 0.4-0.6 g / cm³, and the third is 0.7-0.9 g / cm³. The core function of this stepped density design is to construct a highly efficient tiered filtration system: When air flows through this membrane assembly, the first permeable membrane, with the lowest density and relatively large pores, first comes into contact with the external environment, blocking most of the larger particles such as pollen and dust; the second permeable membrane, with a moderate density, further filters finer dust and some water vapor; finally, the third permeable membrane, with the highest density and extremely fine pores, acts as the ultimate barrier, effectively blocking the intrusion of tiny droplets and oil mist. This coarse-to-fine filtration mechanism ensures that gas molecules can pass through smoothly to balance internal and external pressures, while greatly enhancing the overall protective efficacy against a variety of pollutants and significantly improving the anti-clogging ability and long-term service life of the breathable membrane assembly.

[0019] In addition, the inner wall of the hollow cylinder is provided with a first annular retaining platform, a second annular retaining platform, and a third annular retaining platform at the positions corresponding to the first, second, and third breathable membranes, respectively, to support and fix each layer of breathable membrane.

[0020] In detail, the inner wall of the hollow cylinder is precisely equipped with a first annular mounting platform, a second annular mounting platform, and a third annular mounting platform. These platforms are located at the installation positions corresponding to the first, second, and third breathable membranes, respectively. This hierarchical mounting platform structure provides precise, independent, and reliable physical support and positioning for the three breathable membranes with different densities and functions. Each breathable membrane can be smoothly placed on the end face of its corresponding annular mounting platform, thus ensuring that the membrane layers maintain the necessary spacing to form a graded filtration space while being firmly pressed and fixed, effectively preventing displacement, wrinkling, or damage under vehicle vibration or airflow impact. This design not only achieves the compact and orderly integration of multi-layer membrane components, but more importantly, it ensures that the gradient filtration channels from coarse to fine are always in optimal working condition, thereby fully leveraging their synergistic protective effectiveness.

[0021] In summary, this utility model achieves efficient graded filtration of water vapor and pollutants through a multi-layer gradient density design. At the same time, the threaded connection and sealing ring ensure overall sealing. It has the advantages of compact structure, reliable installation, and high protection level, and is suitable for devices such as vehicle lights that require waterproof and breathable technology.

[0022] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the present invention's conception through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A waterproof and breathable mounting cap structure, characterized in that, include: The cap body has an annular hollow fixing ring at its top and a threaded portion on the inner side of its bottom. A hollow cylinder has an mounting portion at its top, which is fixed to the bottom of the fixing ring via the threaded portion. The hollow cylinder contains a stepped breathable membrane assembly, which includes a first breathable membrane, a second breathable membrane, and a third breathable membrane arranged sequentially from top to bottom. The density of the first breathable membrane is less than the density of the second breathable membrane, and the density of the second breathable membrane is less than the density of the third breathable membrane.

2. The waterproof and breathable mounting cap structure according to claim 1, characterized in that, The fixing ring is spaced a certain distance from the perimeter of the cap body.

3. The waterproof and breathable mounting cap structure according to claim 1, characterized in that, The mounting part is integrally formed with the hollow cylinder, and its outer wall is provided with an external thread that matches the threaded part. A sealing ring is also fitted at the bottom of the mounting part.

4. The waterproof and breathable mounting cap structure according to claim 1, characterized in that, The inner wall of the hollow cylinder is provided with a first annular retaining platform, a second annular retaining platform, and a third annular retaining platform corresponding to the positions of the first, second, and third breathable membranes, respectively, for supporting and fixing each layer of breathable membrane.

5. The waterproof and breathable mounting cap structure according to claim 1, characterized in that, The density of the first breathable membrane is 0.1-0.3 g / cm³. 3 The density of the second breathable membrane is 0.4-0.6 g / cm³. 3 The density of the third breathable membrane is 0.7-0.9 g / cm³. 3 .

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