High-pressure water-proof air-permeable component structure

Abstract

The utility model discloses a kind of high-pressure water ventilation assembly structures, including shell, waterproof air-permeable membrane assembly and protective end cap. Shell has upper base portion with support boss and lower limit boss and lower buckle portion, middle part is equipped with through hole. Waterproof air-permeable membrane assembly is fixed in support boss by laser welding and seals through hole. Protective end cap is buckled with the buckle groove of shell by the stepped card seat of its edge, and its lower surface is equipped with upper limit boss. Upper limit boss and lower limit boss are staggered and keep interval, form labyrinth air passage, and work together with pressure relief hole on protective end cap. The utility model ensures sealing reliability by laser welding, effectively disperses and blocks the direct impact of high-pressure water flow using double-limit boss structure, realizes excellent waterproof and air-permeable performance balance in harsh environment, compact structure, convenient installation.

Description

Technical Field

[0001] This utility model belongs to the field of waterproof and breathable technology, specifically, it relates to a structure of a high-pressure water-resistant and breathable component. Background Technology

[0002] Automotive chassis components, low beam headlights, fog lights, and other parts are frequently subjected to high-pressure water washing (such as during car washes or rain splashes) and impacts from gravel during use. At the same time, they need to allow for air circulation and pressure relief between the inside and outside to prevent damage to the components due to pressure differences caused by temperature changes.

[0003] Existing breathable components mostly adopt a "shell + single-layer breathable membrane + simple cover" structure, which has the following defects: high-pressure water can easily directly impact the breathable membrane, causing the membrane to break or leak; the breathable membrane has poor tear resistance and is prone to deformation due to air pressure changes after long-term use; the assembly gap between the cover and the shell is not reasonably designed, which can easily lead to water accumulation or insufficient breathability; in addition, the sealing structure is simple and prone to leakage in vibration environments.

[0004] Therefore, this utility model proposes a structurally optimized anti-high-pressure water breathable component, which solves the above problems through multi-level protection and composite membrane structure. Utility Model Content

[0005] In view of this, the technical problem to be solved by this utility model is to provide a high-pressure water-resistant breathable component structure. By optimizing the design of the shell, the waterproof and breathable membrane component, and the protective end cap, the problems of poor sealing and easy damage in the prior art are solved. This utility model uses laser welding to fix the breathable membrane, combined with double limiting bosses and a buckle structure, to achieve reliable sealing and efficient ventilation under high-pressure water.

[0006] To solve the above-mentioned technical problems, this utility model discloses a high-pressure water-resistant breathable component structure, comprising: The system consists of a housing, a waterproof and breathable membrane assembly, and protective end caps. The housing serves as the basic support structure, the waterproof and breathable membrane assembly provides both breathability and waterproofing, and the protective end caps provide external protection and guide pressure relief.

[0007] Specifically, the housing has an upper base portion and a lower latching portion, and a through hole is provided between the upper base portion and the lower latching portion; the upper base portion has a support boss surrounding the through hole, and a lower limiting boss located on the outer ring of the support boss and spaced apart, the lower limiting boss is higher than the support boss, and the thickness of the upper base portion gradually decreases from the lower limiting boss outwards, and has three equally divided latching grooves; The waterproof and breathable membrane assembly is laser-welded to the supporting boss and the through holes are sealed. The protective end cap is snapped onto the upper base. Its outer edge has three downward stepped latches. Each stepped latch has a latch foot corresponding to the latch groove and a stop block located on both sides of the latch foot and abutting against the upper base. The lower surface of the protective end cap has an upper limit boss located relative to the outer ring of the lower limit boss, and the upper surface of the protective end cap has multiple pressure relief holes located relative to the outer ring of the upper limit boss. The upper limit boss is spaced apart from the upper base portion, and the lower limit boss is spaced apart from the surface of the protective end cap.

[0008] Furthermore, the edge of the protective end cap has a lower protective skirt located between the stepped brackets. The lower protective skirt is curved to guide the side water flow to the outside and reduce the probability of water flowing into the interior of the component.

[0009] Furthermore, the support boss has a membrane positioning groove with a depth of 0.3mm, which is used to accurately position the waterproof and breathable membrane assembly to ensure that the membrane and the through hole are coaxial during welding.

[0010] Furthermore, the waterproof and breathable membrane assembly has a three-layer composite structure with a total thickness of 0.3-0.5mm. From the side near the protective end cap to the side near the shell, it includes a PTFE base membrane, a polyester fiber support layer, and a graphene nano-coating. The PTFE base membrane has a thickness of 0.1mm and a pore size of 0.2-0.3μm, achieving basic breathability and waterproofing. The polyester fiber support layer has a thickness of 0.15mm and a mesh density of 50 mesh, enhancing the membrane's tear resistance. The graphene nano-coating has a thickness of 0.05mm, improving the membrane's resistance to oil stains and aging.

[0011] Furthermore, the cross-sectional area of ​​a single pressure relief hole is 3-7 mm². 2 This ensures rapid pressure release during high-pressure water impact; the cross-sectional area of ​​the through-hole is between 19.6 and 50.2 mm². 2 It matches the area of ​​the waterproof and breathable membrane component to ensure breathability efficiency.

[0012] Furthermore, both the lower limit boss and the upper limit boss are divided into 3-4 segments along the circumference, with gaps between adjacent segments. This not only does not obstruct gas flow but also disperses the impact force of water flow through the segmented structure.

[0013] Furthermore, a circular sealing ring is fitted on the lower buckle part for sealing the component with the external light fixture, preventing water or dust from seeping in from the assembly gap.

[0014] Compared with the prior art, the present invention can achieve the following technical effects: The pressure relief hole of the protective end cap can quickly release water pressure, and the interval and segmented structure formed by the upper / lower limit bosses can disperse the impact of water flow and prevent the waterproof and breathable membrane from being directly impacted by high-pressure water; the composite waterproof and breathable membrane achieves breathability and waterproofness through the PTFE base membrane, the polyester fiber support layer enhances the structural strength, and the graphene nano-coating improves the stain resistance and extends the service life. The stepped retainer of the protective end cap fits precisely with the snap-fit ​​groove of the housing, and the stop block ensures stable assembly clearance; the circular sealing ring of the lower snap-fit ​​part ensures the sealing performance between the component and the outside. The gradually thinning design of the base, the lower protective skirt of the end cap, and the gap structure of the limiting boss can guide water flow to drain quickly and prevent water accumulation.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the above-mentioned technical effects at the same time. Attached Figure Description

[0016] 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 three-dimensional structural view of the anti-high-pressure water breathable component according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the installation of the anti-high-pressure water breathable component according to an embodiment of the present utility model; Figure 3 This is a cross-sectional schematic diagram of the anti-high-pressure water breathable component structure according to an embodiment of this utility model.

[0017] Attached Figure Labels

[0018] The housing 100 includes an upper base 110, a support boss 111, a lower limit boss 112, a snap-fit ​​groove 113, a through hole 114, a lower snap-fit ​​part 120, a waterproof and breathable membrane assembly 200, a protective end cap 300, a stepped card holder 310, a card foot part 311, a stop block part 312, an upper limit boss 320, a pressure relief hole 330, a lower protective skirt 340, and a circular sealing ring 400. Detailed Implementation

[0019] 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.

[0020] Please refer to Figures 1 to 3 , Figure 1 This is a three-dimensional view of the anti-high-pressure water breathable component structure according to an embodiment of this utility model; Figure 2 This is a schematic diagram of the installation of the anti-high-pressure water breathable component according to an embodiment of this utility model; Figure 3 This is a cross-sectional schematic diagram of the anti-high-pressure water breathable component structure according to an embodiment of this utility model.

[0021] As shown in the figure, the structure of the high-pressure water-proof and breathable component of this utility model includes a shell 100, a waterproof and breathable membrane component 200, and a protective end cap 300.

[0022] The housing 100 is injection molded from engineering plastic (such as PBT or nylon) and has an upper base portion 110 and a lower snap-fit ​​portion 120. A through hole 114 is provided between the upper base portion 110 and the lower snap-fit ​​portion 120 for airflow. The upper base portion 110 has a supporting boss 111, a lower limiting boss 112, and three snap-fit ​​grooves 113. The supporting boss 111 surrounds the through hole 114 and is used for positioning and welding the waterproof and breathable membrane assembly 200. The lower limiting boss 112 is located on the outer ring of the supporting boss 111 and is spaced apart from the supporting boss 111, and the lower limiting boss 112 is higher than the supporting boss 111. The thickness of the upper base portion 110 gradually decreases outward from the lower limiting boss 112, forming a sloping structure, which helps to disperse water flow. The snap-fit ​​grooves 113 are evenly distributed on the edge of the upper base portion 110 for engaging with the protective end cap 300.

[0023] The waterproof and breathable membrane assembly 200 is fixed to the support boss 111 by laser welding, and the through hole 114 is sealed. Laser welding ensures a firm seal and can withstand high-pressure water impact. In a preferred embodiment, the support boss 111 is provided with a membrane positioning groove (not shown) with a depth of 0.3 mm for precise placement of the waterproof and breathable membrane assembly 200 and to prevent displacement.

[0024] The waterproof and breathable membrane assembly 200 is a three-layer composite structure with a total thickness of 0.3-0.5 mm. From the side near the protective end cap 300 to the side near the shell 100, it sequentially comprises a PTFE base film, a polyester fiber support layer, and a graphene nano-coating. The PTFE base film is 0.1 mm thick with a pore size of 0.2-0.3 μm, providing high-efficiency breathability and waterproofness; the polyester fiber support layer is 0.15 mm thick with a mesh density of 50 mesh, enhancing mechanical strength; the graphene nano-coating is 0.05 mm thick, improving chemical resistance and antibacterial properties. This composite structure maintains breathability while improving durability and protection level. The specific process is as follows: First, the polyester fiber support layer is subjected to corona treatment or plasma treatment to improve its surface energy and adhesion to the coating. Then, using precision coating equipment (such as a slot coater or microgravure coater), an aqueous or solvent-based dispersion containing graphene nanosheets is uniformly coated onto one surface of the polyester fiber support layer. Subsequently, the material enters a segmented oven (e.g., 60℃→100℃→140℃) to gradually evaporate the solvent, allowing the graphene nanosheets to form a dense, continuous cured coating on the polyester fiber surface. This side is the one closest to the shell. The PTFE base film is aligned with the graphene-coated polyester fiber support layer, ensuring contact between the uncoated side of the PTFE base film and the polyester fiber support layer. A hot roller lamination method is used for composite bonding. The two layers are passed through a pair of heated rollers. Under temperature and pressure, the PTFE film itself does not melt, but its porous structure creates physical interlocking and intermolecular forces with the polyester fibers at the interface. Simultaneously, the polyester fiber surface slightly melts, forming a strong physical bond with the PTFE film, thus forming a unified composite. Finally, the laminated composite material enters a curing zone for heat preservation and curing to eliminate internal stress and ensure optimal interlayer bonding strength. According to the required dimensions, the composite film is precision die-cut or laser-cut into circular blanks, yielding the waterproof and breathable membrane assembly 20.

[0025] The protective end cap 300 is made of wear-resistant plastic (such as ABS) and has a snap-fit ​​mechanism attached to the upper base portion 110. The outer edge of the protective end cap 300 has three downward-facing stepped retainers 310, each including a retaining foot 311 and a stop portion 312. The retaining foot 311 engages with a snap-fit ​​groove 113 for quick snap-fit ​​connection; the stop portion 312 abuts against the surface of the upper base portion 110 to prevent excessive rotation or displacement of the protective end cap 300. The lower surface of the protective end cap 300 has an upper limit boss 320 located around the lower limit boss 112 and spaced apart from the upper base portion 110 (e.g., a 0.5-1 mm gap). The upper surface of the protective end cap 300 has multiple pressure relief holes 330 located around the upper limit boss 320 for releasing pressure and allowing airflow. The individual cross-sectional area of ​​each pressure relief hole 330 is 3-7 mm². 2The total cross-sectional area is designed according to requirements; the cross-sectional area of ​​the 114 through hole is between 19.6-50.2 mm². 2 (Corresponding to round holes with a diameter of 5-8mm) to ensure airflow.

[0026] The gap between the upper limit boss 320 and the upper base portion 110, and the gap between the lower limit boss 112 and the surface of the protective end cap 300, together form a labyrinthine airflow channel. When high-pressure water impacts, the water first enters the gap area through the pressure relief hole 330, but is blocked and dispersed by the limit boss, and cannot directly impact the waterproof and breathable membrane assembly 200, thus achieving the function of preventing high-pressure water.

[0027] In another embodiment, the edge of the protective end cap 300 has a lower protective skirt 340 located between the stepped brackets 310. The lower protective skirt 340 is curved to guide water flow away from the center of the component and reduce water buildup.

[0028] In a further embodiment, both the lower limiting boss 112 and the upper limiting boss 320 are divided into 3-4 segments along the circumference, with gaps between adjacent segments. This segmented design reduces weight and allows airflow from multiple directions, improving breathability.

[0029] The lower snap-fit ​​part 120 is equipped with a circular sealing ring 400 (such as an O-ring) to provide an additional seal when the component is installed into the equipment housing, preventing water from seeping in from the interface.

[0030] During assembly, the waterproof and breathable membrane component 200 is first placed on the support boss 111 and fixed by laser welding; then the circular sealing ring 400 is fitted onto the lower snap-fit ​​part 120; finally, the snap-fit ​​foot part 311 of the protective end cap 300 is aligned with the snap-fit ​​groove 113 and pressed to engage, so that the stop part 312 is tightly attached to the upper base part 110. After assembly, the component can be installed onto the equipment housing through the lower snap-fit ​​part 120 to achieve sealing and breathability.

[0031] This invention can withstand high-pressure water impact with an IP67 or higher rating during testing, while maintaining stable air permeability. It is suitable for harsh environments such as automotive lights, sensors, and outdoor communication equipment.

[0032] 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 inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. 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 high-pressure water-resistant breathable component structure, characterized in that, include: The housing has an upper base portion and a lower snap-fit ​​portion, and a through hole is provided between the upper base portion and the lower snap-fit ​​portion; the upper base portion has a support boss surrounding the through hole, and a lower limiting boss located on the outer ring of the support boss and spaced apart, the lower limiting boss being higher than the support boss, and the thickness of the upper base portion gradually decreasing outward from the lower limiting boss, and having three equally divided snap-fit ​​grooves; A waterproof and breathable membrane assembly that is laser-welded to the supporting boss and seals the through hole; A protective end cap with a snap fastener is provided on the upper base portion. The outer edge of the protective end cap has three downward stepped latches. Each stepped latch has a latching foot portion corresponding to the snap fastener groove and a stop portion located on both sides of the latching foot portion and abutting against the upper base portion. The lower surface of the protective end cap has an upper limit boss located relative to the outer ring of the lower limit boss, and the upper surface of the protective end cap has a plurality of pressure relief holes located relative to the outer ring of the upper limit boss. The upper limit boss is spaced apart from the upper base portion, and the lower limit boss is spaced apart from the surface of the protective end cap.

2. The high-pressure water-resistant breathable component structure according to claim 1, characterized in that, The protective end cap edge has a lower protective skirt located between the stepped card seats, and the lower protective skirt has a curvature.

3. The high-pressure water-resistant breathable component structure according to claim 1, characterized in that, The supporting boss has a membrane positioning groove with a depth of 0.3 mm, which is used to position the waterproof and breathable membrane assembly.

4. The high-pressure water-resistant breathable component structure according to claim 1, characterized in that, The waterproof and breathable membrane assembly is a three-layer composite structure with a total thickness of 0.3-0.5 mm. From the side near the protective end cap to the side near the shell, it includes a PTFE base film, a polyester fiber support layer, and a graphene nano-coating. The PTFE base film has a thickness of 0.1 mm and a breathable pore size of 0.2-0.3 μm. The polyester fiber support layer has a thickness of 0.15 mm and a mesh density of 50 mesh. The graphene nano-coating has a thickness of 0.05 mm.

5. The high-pressure water-resistant breathable component structure according to claim 1, characterized in that, The cross-sectional area of ​​a single pressure relief hole is 3-7 mm². 2 The cross-sectional area of ​​the through hole is between 19.6 and 50.2 mm². 2 .

6. The high-pressure water-resistant breathable component structure according to claim 1, characterized in that, The lower limit boss and the upper limit boss are both divided into 3-4 segments along the circumference, with gaps between adjacent segments.

7. The high-pressure water-resistant breathable component structure according to claim 1, characterized in that, The lower snap-fit ​​part is fitted with a circular sealing ring.

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