Water faucet structure capable of being turned off and turned off instantly

Abstract

The invention discloses an instant-closing instant-stopping faucet structure which comprises a flexible gasket, the top of the flexible gasket is provided with a buckling structure, the bottom of the flexible gasket is provided with a special-shaped structure, the thickness of the special-shaped structure decreases gradually from the center of the flexible gasket to the edge of the flexible gasket, and the top of the buckling structure is arranged in the water outlet direction of a faucet; the water passing connector is provided with an assembly hole matched with the buckling structure, the top of the buckling structure penetrates through the assembly hole and is detachably connected with the assembly hole, and the edge of the bottom of the special-shaped structure makes contact with the inner side face of the water passing connector; the assembly hole is located in the center of the water passing connector, and a plurality of water passing holes are evenly distributed in the periphery of the assembly hole. The flexible gasket and the water passing connector are installed in a water channel, close to the water outlet, in the faucet body. By means of elastic deformation of the special flexible gasket and dynamic sealing fit of the water passing connector, the function of stopping and stopping water flow is achieved, an electronic element or a complex transmission mechanism is not needed, the manufacturing cost is remarkably reduced, meanwhile, the sealing durability and the adaptation flexibility are improved, and the water passing connector can be widely applied to various kinds of bathroom equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of bathrooms, and more particularly to a faucet structure capable of being turned on and off instantly. Background Art

[0003] Traditional faucets control the opening and closing of water flow by rotating or pressing a valve core (such as a ceramic valve core or a rubber gasket). However, this type of design has the following significant problems: Closing delay and leakage: After the valve core is closed, a small amount of water often leaks out of the outlet due to the residual water pressure in the pipeline. It takes several seconds for the water flow to completely stop. Especially in scenarios with high water-saving requirements, this defect causes a waste of water resources.

[0004] Complex structure and high cost: Precision valve cores (such as ceramic valve cores) rely on high-precision processing, have high manufacturing costs, and are prone to leakage due to wear from impurities or aging of seals after long-term use, requiring frequent maintenance.

[0005] Dependence on external energy: Some on-off stop technologies use solenoid valves or electronic sensing devices, which require additional power support. This not only increases energy consumption, but also limits its application in environments without electricity or low-cost scenarios.

[0006] In recent years, some improved instant-on-off faucets have appeared on the market, such as spring-assisted seals or quick-closing valve structures, but they still have the following shortcomings: Spring fatigue: Long-term compression can easily lead to elastic attenuation and seal failure; Large water flow resistance: Complex waterway design affects water flow rate and reduces user experience; Poor adaptability: The structure is difficult to miniaturize and cannot be adapted to many types of bathroom products such as overhead shower heads and handheld shower heads.

[0007] In response to the above problems, there is an urgent need for a purely mechanical, low-cost, high-reliability faucet structure that can be turned on and off immediately. This can not only effectively solve the leakage problem of traditional faucets and save water resources, but also significantly reduce manufacturing costs, while improving sealing durability and adaptability. It can be widely used in various bathroom equipment in homes, businesses and public facilities. Summary of the invention

[0008] An object of the present invention is to solve at least the above problems and / or disadvantages and to provide at least the advantages which will be described hereinafter.

[0009] The purpose of the present invention is to provide a faucet structure that stops and starts immediately. In view of the many drawbacks of the faucet solution, a faucet structure that stops and starts immediately with a simple structure, pure mechanical, low cost and high reliability has been developed. The structure abandons the traditional valve core structure through innovative design, and uses the elastic deformation of a special flexible gasket and the dynamic seal of a water-passing joint to achieve the function of stopping and turning the water flow immediately. The faucet structure that stops and starts immediately does not require electronic components or complex transmission mechanisms, significantly reducing manufacturing costs, while improving sealing durability and adaptability, and can be widely used in various bathroom equipment in homes, businesses and public facilities.

[0010] In order to achieve the purpose and other advantages according to the present invention, a faucet structure is provided, comprising: A flexible gasket, with a buckle structure on the top and a special-shaped structure with a decreasing thickness from the center to the edge of the flexible gasket on the bottom, and the top of the buckle structure is arranged toward the direction of water discharge from the faucet; A water-passing joint, which is provided with an assembly hole adapted to the buckle structure, the top of the buckle structure passes through the assembly hole and is detachably connected to the assembly hole, and the bottom edge of the special-shaped structure contacts the inner side of the water-passing joint; the assembly hole is located at the center of the water-passing joint, and a plurality of water-passing holes are evenly distributed around the assembly hole; The flexible gasket and the water-passing joint are installed in the water channel inside the faucet body and close to the water outlet.

[0011] Preferably, the kitchen faucet uses a nitrile rubber gasket, the bathroom basin faucet uses a silicone rubber gasket, and the shower faucet uses a heat-resistant silicone rubber gasket, and the working temperature range of the heat-resistant silicone rubber gasket is -50°C to 250°C; Among them, 2% to 5% of organic montmorillonite by mass is added to nitrile rubber to improve heat resistance, and 3% to 8% of fumed silica by mass is added to silicone rubber to enhance tensile strength and oil resistance.

[0012] Preferably, the snap-fit ​​structure is provided with a chamfer, and the flexible gasket is a silicone rubber gasket or a nitrile rubber gasket; the snap-fit ​​structure is provided with a chamfer, and the chamfer is an arc or an angle of 30 to 60 degrees, and the top diameter of the snap-fit ​​structure is 1.5 to 3 mm smaller than the bottom diameter.

[0013] Preferably, the middle thickness of the special-shaped structure is 2-8 mm, the edge thickness is 0.5-3 mm, and the diameter of the assembly hole is 5-12 mm.

[0014] Preferably, in areas where the water pressure is greater than 0.3 MPa, the middle thickness of the special-shaped structure is 5 to 8 mm, and the edge thickness is 1.5 to 3 mm; in areas where the water pressure is less than 0.1 MPa, the middle thickness of the special-shaped structure is 2 to 5 mm, and the edge thickness is 0.5 to 1.5 mm; In areas where the water pressure is greater than 0.3 MPa, the diameter of the assembly hole is 8-12 mm, the number of water holes is 8-10, the diameter of the water holes is 5-6 mm, the total height of the water joint is 20-25 mm, and the inner surface roughness of the water joint is 2.0-3.0 μm; in areas where the water pressure is less than 0.1 MPa, the diameter of the assembly hole is 5-8 mm, the number of water holes is 4-6, the diameter of the water holes is 5-7 mm, the total height of the water joint is 15-20 mm, and the inner surface roughness of the water joint is 1.6-2.0 μm.

[0015] Preferably, the surface of the flexible gasket is coated with a self-cleaning nano coating, and the self-cleaning nano coating is a titanium dioxide nano coating with a coating thickness of 50 to 100 nanometers; The titanium dioxide nano-coating is doped with silver ions with a mass fraction of 0.5% to 2% to enhance the antibacterial property and inhibit the growth of bacteria on the surface of the flexible gasket.

[0016] Preferably, a microscopic texture structure is provided on the surface of the flexible gasket on the side in contact with the outlet water flow, the texture structure is regularly distributed in strips, the depth of the texture is precisely controlled between 10 and 30 microns, and the width is in the range of 20 to 50 microns; the spacing between the textures is 50 to 100 microns, and the adjacent textures are parallel to each other, and the texture structure is manufactured by photolithography or micro injection molding process; Before making the texture structure, the surface of the flexible gasket is subjected to plasma treatment. After the treatment, the roughness Ra of the surface of the flexible gasket reaches 0.5 to 1.5 microns.

[0017] Preferably, an internal thread is provided in the water channel of the faucet body and at the connection position with the water connection joint, the water connection joint is provided with an external thread matching the internal thread, and a sealing ring is provided at the connection between the internal thread and the external thread.

[0018] The invention also discloses a bathroom product, which comprises an instant-on / off faucet structure.

[0019] The present invention also discloses a method for instantly turning off and stopping a faucet, which comprises the following steps: Step 1: Install a flexible gasket and a water-passing joint in the water channel inside the faucet. A buckle structure is provided on the top of the flexible gasket, and a special-shaped structure with a decreasing thickness from the center to the edge of the flexible gasket is provided on the bottom. The top of the buckle structure passes through the assembly hole provided on the water-passing joint and is inserted into the assembly hole through interference fit. Step 2: When the faucet is turned on, water flows into the internal waterway of the faucet. Under the action of water pressure, the bottom edge of the special-shaped structure opens outward, allowing water to flow out from both sides of the special-shaped structure through the water holes on the water joint; Step 3. When the faucet is turned off, the water pressure in the water channel of the faucet drops rapidly to near zero, the flexible gasket automatically resets due to its own elasticity, the bottom edge of the special-shaped structure fits tightly against the inner side of the water outlet joint again, and the water outlet joint automatically closes, blocking the residual water in the faucet from flowing out, thus realizing the function of instant on and off.

[0020] The present invention has at least the following beneficial effects: First, the instant on / off faucet structure of the present invention abandons the traditional valve core structure, and adds the elastic deformation of a special flexible gasket and a water-passing joint in the internal pipe of the faucet, and utilizes the dynamic sealing cooperation of the two. When the faucet is turned on, the side of the rubber gasket automatically opens due to the water pressure to allow water to pass through. In addition, due to the characteristics of being thick in the middle and thin at the edges and the snap-fit ​​structure buckled in the assembly hole of the water-passing joint, the flexible gasket is only deformed at the edge, which will not block the bubbler and affect the normal water output. When the faucet is closed, the water pressure is close to 0, and due to the elastic automatic reset characteristic of the flexible gasket, the edge of the flexible gasket and the water-passing joint will automatically close, thereby isolating the water remaining in the internal pipe of the faucet above the flexible gasket and preventing it from seeping out, thereby achieving the instant on / off effect.

[0021] Secondly, the instant-off-and-stop faucet structure of the present invention has a simple structure, extremely low cost, stable function, long service life, and is also easy to repair and replace.

[0022] Thirdly, the instant-off-and-stop faucet structure of the present invention has a wide range of applications and can be extended to various sanitary products, not only for faucets, but also for overhead showers, spray heads and other products.

[0023] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a flexible gasket in an instant-on-off faucet structure according to an embodiment of the present invention; Figure 2 is a cross-sectional view of a flexible gasket in an instant-on-off faucet structure according to another embodiment of the present invention; Figure 3 It is a structural schematic diagram of a water-passing joint in an instant-off-stop faucet structure according to an embodiment of the present invention; Figure 4 It is a cross-sectional view of a water-passing joint in an instant-on-off faucet structure according to an embodiment of the present invention; Figure 5 It is a schematic diagram of the installation position of the instant-on / off faucet structure in a faucet pipe (without water flowing) according to an embodiment of the present invention; Figure 6 It is a structural schematic diagram of an instant-on / off faucet structure in a faucet pipeline (in a water-flowing state) according to an embodiment of the present invention; Figure 7 It is a structural schematic diagram of an instant-off-and-stop faucet structure in a faucet pipeline (in a water-off state) according to an embodiment of the present invention; Figure numerals: 1: flexible gasket, 100, snap-fit ​​structure, 110: special-shaped structure, 120: chamfer, 2: water flow joint, 200: assembly hole, 210: water flow hole, 220: sealing layer, 3: faucet elbow, 4, faucet internal water channel, 5: bubbler shell, 6: bubbler liner. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0027] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0028] It should be noted that, in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] It should be noted that the control methods in the following technical solutions are conventional methods unless otherwise specified, and the equipment structures are commercially available unless otherwise specified.

[0030] like Figures 1 to 7 The present invention provides a faucet structure capable of being turned on and off instantly, comprising: A flexible gasket 1, a buckle structure 100 is provided on the top thereof, a shaped structure 110 with a decreasing thickness from the center to the edge of the flexible gasket 1 is provided on the bottom of the shaped structure, and the top of the buckle structure 100 is arranged toward the direction of water discharge from the faucet; The water-passing joint 2 is provided with an assembly hole 200 adapted to the buckling structure 100, the top of the buckling structure 100 passes through the assembly hole 200 and is detachably connected to the assembly hole 200, and the bottom edge of the special-shaped structure 110 contacts the inner side of the water-passing joint 2; the assembly hole 200 is located at the center of the water-passing joint 2, and a plurality of water-passing holes 210 are evenly distributed around the assembly hole 200; The flexible gasket 1 and the water-passing joint 2 are installed in the water channel inside the faucet body and close to the water outlet.

[0031] In the above technical solution, the material selection is as follows: Flexible gasket 1: Food-grade silicone rubber material is used to make flexible gasket 1. This material has good elasticity, water resistance and corrosion resistance, meets the sanitary standards for contact between faucets and water, and can ensure that the water quality will not be polluted during long-term use. At the same time, its excellent elasticity can ensure that the gasket can be effectively sealed and opened when the water pressure changes. Water joint 2: Stainless steel is used to make water joint 2. Stainless steel has the characteristics of high strength and not easy to rust. It can ensure that the water joint works stably for a long time in the humid use environment of the faucet, avoids structural damage or affects the sealing performance due to rust, and can also withstand the erosion of water flow.

[0032] Design and production: Flexible gasket 1: The flexible gasket 1 is in the shape of a disc as a whole. The buckle structure 100 on the top is designed as an annular collar protruding outward, and the outer diameter of the collar is slightly larger than the inner diameter of the assembly hole 200 on the water joint 2, forming an interference fit to ensure that the buckle structure 100 can be tightly stuck in the assembly hole 200 to achieve a detachable connection. The thickness of the special-shaped structure 110 at the bottom decreases linearly from the center to the edge, the center thickness is set to 8 mm, and the edge thickness is 3 mm. It is manufactured by integral molding of a mold to ensure uniform thickness variation. Water joint 2: The water joint 2 is a cylindrical structure, and an assembly hole 200 is opened at its center. The assembly hole 200 is circular, and the diameter is precisely designed according to the size of the buckle structure 100 of the flexible gasket 1, and the tolerance is controlled within the range of ±0.1 mm to ensure the matching accuracy. There are multiple circular water holes evenly distributed on the pipe wall of the water joint 2. The diameter of the water holes is 5 mm, and the number is 4. These water holes are used to pass water so that the water can smoothly pass through the water joint 2. The inner side of the water joint 2 is finely polished, and the surface roughness is controlled at Ra=1.6 μm to ensure good contact with the bottom edge of the special-shaped structure 110 of the flexible gasket 1 to achieve reliable sealing.

[0033] Installation process: Figure 6As shown, align the buckle structure 100 of the manufactured flexible gasket 1 with the assembly hole 200 of the water joint 2, and press it vertically with force, so that the annular collar of the buckle structure 100 is inserted into the assembly hole 200 through interference fit, and the preliminary assembly of the flexible gasket 1 and the water joint 2 is completed. The assembled flexible gasket 1 and the water joint 2 are placed in the waterway near the water outlet in the faucet body. The positioning is performed by the positioning groove set on the waterway wall and the positioning protrusion on the outer surface of the water joint 2 to ensure that its installation position is accurate. Then, a sealant is used to seal the connection between the water joint 2 and the waterway wall to prevent water leakage. The bubbler inner tank 6 (including multi-layer filter screen and air-water mixing structure) is inserted into the water outlet end of the water joint 2, and connected to the water joint 2 through the thread or buckle at the bottom of the inner tank; tighten or press until the limiting shoulder of the inner tank 6 fits with the end face of the water joint 2 to ensure that there is no axial gap. Put the bubbler shell 5 on the outside of the inner tank 6, and align the guide groove on the inner wall of the shell with the guide rib on the outer wall of the inner tank; rotate the shell 5 clockwise (or press it in) until the lock of the shell 5 engages with the slot on the outer edge of the faucet outlet, and a "click" sound is heard to indicate that it is in place. Install an O-ring (made of NBR rubber) between the shell 5 and the faucet outlet to prevent external water seepage; turn on the faucet to test the water flow, observe whether the bubbler discharges water evenly and the bubble mixing effect, and check whether there is any leakage at each interface.

[0034] Working process: Open state: When the faucet is turned on, water flows into the waterway of the faucet body, and the water pressure acts on the flexible gasket 1. Since the special-shaped structure 110 at the bottom of the flexible gasket 1 is thick in the center and thin at the edges, under the action of water pressure, its edge part will open outward, allowing water to flow out from both sides of the special-shaped structure 110 through the water hole 210 on the water joint 2. The water flow position is as follows: Figure 6 The water flows out of the faucet outlet to the position indicated by the arrow. At the same time, because the snap-fit ​​structure 100 of the flexible gasket 1 is stuck in the assembly hole 200 of the water joint 2, the displacement of the flexible gasket 1 is limited so that it will not be washed away under the impact of the water flow, and only the edge will be elastically deformed, which will not block the water hole or affect the normal water outlet. When the faucet is closed, the water pressure in the waterway drops rapidly to near zero. At this time, the flexible gasket 1 automatically resets itself due to the elasticity of its own silicone rubber material, and the bottom edge of the special-shaped structure 110 fits tightly against the inner side of the water joint 2 again, and automatically closes with the water joint, playing an isolating role, so that the residual water in the internal pipe of the faucet above the gasket cannot seep out, achieving the effect of turning it off and stopping it immediately.

[0035] Maintenance and care suggestions: Check the flexible gasket 1 and water joint 2 at regular intervals (recommended every 3 to 6 months) to see if there is any wear, aging or damage. If any problems are found, they should be replaced in time to ensure the normal use of the faucet and the effectiveness of the on-off function. Clean the inside of the faucet regularly (monthly) and use a mild detergent to remove impurities and scale to prevent impurities from accumulating and affecting the normal operation of the flexible gasket 1 and water joint 2. Be careful not to scratch the surface of the flexible gasket 1 and water joint 2 when cleaning.

[0036] Functional verification and testing: Sealing test: Under 0.8 MPa overpressure, observe for 10 minutes after closing the faucet, no leakage; after cyclic opening and closing test (10,000 times), the wear of the sealing surface is less than 0.1 mm. Durability test: After high temperature aging (80 degrees Celsius, 500 hours), the hardness change of the rubber gasket is ≤5 HA, no cracks; cold water / hot water (5-80 degrees Celsius) alternating impact test, no structural deformation. Water flow performance: Under 0.3 MPa standard water pressure, the flow rate is ≥12 L / min, and the water flow noise is less than 45 dB (A).

[0037] Application scenario examples: Household basin faucet: adapt to the standard 4-point interface, and the water supply will be completely cut off within 1 second after the faucet is turned off; public bathroom overhead shower: increase the flow rate by increasing the number of water holes (12 holes) to meet the needs of multiple people; kitchen spray gun: optimize the gasket edge thickness to 0.8 mm to enhance the response speed under high-frequency opening and closing.

[0038] like Figure 3 As shown, the water joint 2 is cylindrical as a whole, with an outer diameter that matches the inner diameter of the faucet internal waterway 4 at the faucet bend 3, and a height of 20 mm. The assembly hole 200 is located at the center of the water joint 2, and is a circular hole with a diameter of 8.2 mm and a depth of 6 mm, which matches the snap-fit ​​structure of the flexible gasket. The two use an interference fit (interference amount of 0.2 mm) to ensure that the flexible gasket can be firmly installed on the water joint. There are 4 water holes 210 evenly distributed around the assembly hole 200, with a diameter of 5 mm and a distance of 10 mm from the center of the hole to the center of the assembly hole. These water holes are used to allow water to flow through, and their evenly distributed design can ensure that the water flows evenly in the water joint and reduce water flow resistance.

[0039] In another technical solution, the kitchen faucet uses a nitrile rubber gasket, the bathroom basin faucet uses a silicone rubber gasket, and the shower faucet uses a heat-resistant silicone rubber gasket, and the working temperature range of the heat-resistant silicone rubber gasket is -50°C to 250°C; Among them, 2% to 5% of organic montmorillonite by mass is added to nitrile rubber to improve heat resistance, and 3% to 8% of fumed silica by mass is added to silicone rubber to enhance tensile strength and oil resistance.

[0040] In the above technical scheme, nitrile rubber gaskets for kitchen faucets: nitrile rubber (NBR) is selected as the base material, and its acrylonitrile content is controlled at 28%~34% to balance oil resistance and elasticity. Add 3% by mass of organic montmorillonite (OMMT) to nitrile rubber. Specific preparation process: OMMT powder and nitrile rubber compound are mixed at 80°C for 20 minutes through an internal mixer to ensure uniform dispersion. After mixing, vulcanization molding is performed at 160°C and 10MPa pressure through a flat vulcanizer for 30 minutes. The heat resistance of the modified nitrile rubber is increased to 120°C, which is suitable for high-temperature steam environments in the kitchen, while maintaining excellent oil resistance to prevent edible oil erosion. Silicone rubber gaskets for bathroom basin faucets: Food-grade silicone rubber (VMQ) is selected to meet FDA hygiene standards. Add 5% by mass of fumed silica (SiO2) to silicone rubber. Specific preparation process: Mix the fumed silica and silicone rubber premix at 60°C through a twin-screw extruder to avoid agglomeration of silica caused by high temperature. The injection molding process is adopted, the mold temperature is set to 180°C, the injection pressure is 8MPa, and the molding is cooled and fixed. The tensile strength of the modified silicone rubber is increased to 10MPa, and the oil resistance is enhanced, which is suitable for environments with frequent contact with toiletries. Heat-resistant silicone rubber gasket for shower faucet: High temperature resistant silicone rubber (HCR) is selected, and the working temperature range is -50°C to 250°C. Add fumed silica with a mass fraction of 8% to silicone rubber to further improve the heat resistance and mechanical strength. Specific preparation process: The mixing process is the same as that of the basin faucet silicone rubber gasket, but the vulcanization temperature is increased to 200°C and the vulcanization time is extended to 40 minutes. The modified gasket can work stably for a long time in high temperature hot water (≤90°C) without deformation or aging risks.

[0041] In another technical solution, the flexible gasket is a silicone rubber gasket or a nitrile rubber gasket; the buckling structure 100 is provided with a chamfer 120, the chamfer 120 is an arc or an angle of 30 to 60 degrees, and the top diameter of the buckling structure 100 is 1.5 to 3 mm smaller than the bottom diameter.

[0042] In the above technical solution, if Figure 2 As shown, it is a cross-sectional view of a flexible gasket 1 in another embodiment. The flexible gasket 1 is in the shape of a disk as a whole, and the buckle structure 100 is located at the top of the flexible gasket, and the cross-section is trapezoidal. The top diameter is determined to be 10 mm, the bottom diameter is 12 mm, and the difference between the two is 2 mm. The two ends of the top and the two ends of the bottom are connected to form a chamfer 120, and the size of the chamfer 120 is 30 to 60 degrees. This design helps the buckle structure to be smoothly inserted into the assembly hole of the water joint and achieve a stable connection.

[0043] Silicone rubber gaskets and nitrile rubber gaskets each have unique properties in the faucet stop-and-go device and are applicable in different scenarios. Silicone rubber gaskets excel in heat resistance, aging resistance, and hygiene, and are suitable for environments that have high requirements for these properties; nitrile rubber gaskets have advantages in oil resistance and sealing performance, and are more suitable for places that may come into contact with oil substances and have strict sealing requirements. In actual applications, you can choose according to the actual application scenario and needs.

[0044] 1. Characteristics of silicone rubber gasket: 1) Excellent heat resistance: Silicone rubber has excellent heat resistance and can maintain stable physical properties in high temperature environments. Its operating temperature range is usually between -50℃ and 250℃, and some specially formulated silicone rubber can even withstand higher temperatures. This feature allows silicone rubber gaskets to maintain good elasticity and sealing performance even when the faucet may be flushed with hot water, and will not age quickly, deform or lose the sealing effect due to high temperature, effectively extending the service life of the gasket.

[0045] 2) Good aging resistance: In the natural environment, silicone rubber has strong resistance to ozone, ultraviolet rays and climate aging. After long-term exposure to the air, its performance changes slowly and is not prone to aging phenomena such as cracking and hardening. This means that the faucet stop-and-go device using silicone rubber gaskets can still reliably achieve the stop-and-go function even after long-term use and environmental erosion, reducing water leakage problems caused by gasket aging and reducing maintenance costs.

[0046] 3) Hygiene and environmental protection: Silicone rubber is a non-toxic and harmless material that meets food hygiene and safety standards. In the application scenario of faucets that frequently come into contact with water, silicone rubber gaskets will not release harmful substances into the water, ensuring the safety and hygiene of water use. This feature makes it particularly suitable for places with high water quality requirements such as homes, hospitals, and food processing sites.

[0047] 4) High elasticity and low compression set: Silicone rubber has excellent elasticity and can quickly recover to its original shape after being squeezed by external force. At the same time, its compression set rate is low, that is, it can still maintain good shape and sealing performance after the pressure is removed under long-term compression. In the faucet stop-and-go device, the gasket is frequently subjected to water pressure and mechanical extrusion. These characteristics of silicone rubber ensure that the gasket can fit tightly every time the faucet is opened and closed, effectively preventing water leakage and maintaining the stable operation of the device.

[0048] 5) Good electrical insulation performance: Although electrical insulation performance is not a key factor in faucet applications, the good electrical insulation of silicone rubber makes it suitable for some special occasions (such as environments where faucets are related to electrical equipment), increasing its application flexibility. However, silicone rubber gaskets also have certain disadvantages, such as relatively low tensile strength, poor oil resistance, and may swell when in contact with oily substances, affecting the sealing performance.

[0049] 2. Characteristics of nitrile rubber gasket: 1) Outstanding oil resistance: Nitrile rubber has excellent tolerance to oil substances, which is a significant feature that distinguishes it from silicone rubber. It can resist the erosion of various mineral oils, lubricating oils, fuel oils, etc., and is not prone to swelling, deformation or damage in oil environments. If the environment where the faucet is located may be exposed to oil substances, such as cooking oil splashing near the kitchen faucet, using nitrile rubber gaskets can ensure the stability of the gasket performance, maintain a good sealing effect, and prevent oil leakage.

[0050] 2) Good sealing performance: Nitrile rubber has high tensile strength and good wear resistance, which makes it perform well in sealing applications. It can fit tightly to the sealing surface, effectively fill tiny gaps and uneven places, and prevent the leakage of liquids and gases. In the faucet stop-and-go device, the nitrile rubber gasket can ensure that the water flow is completely blocked when the faucet is turned off with its good sealing performance, realizing the stop-and-go function and reducing the occurrence of water leakage.

[0051] 3) Good chemical corrosion resistance: In addition to oil resistance, nitrile rubber also has a certain tolerance to many chemicals and can resist the corrosion of some weak acids, weak bases and organic solvents. This allows nitrile rubber gaskets to maintain stable performance in some faucet usage scenarios that may be exposed to chemical detergents or other chemicals, extending the service life of the gasket.

[0052] 4) High cost performance: Compared with some high-performance rubber materials, the cost of nitrile rubber is relatively low and has a high cost performance. Under the premise of meeting the sealing performance requirements, the use of nitrile rubber gaskets can reduce the production cost of the product. For large-scale production of faucet stop-and-go devices, this advantage is particularly obvious and helps to improve the market competitiveness of the product. However, nitrile rubber has poor cold resistance and tends to harden and become brittle in low temperature environments, resulting in reduced sealing performance; its heat resistance is also not as good as silicone rubber, and the operating temperature range is generally between -20℃ and 120℃, which limits its application in high temperature environments.

[0053] In actual applications, the environment in which the faucet is located may change over time. For example, the kitchen faucet may initially be in contact with water, but later it may frequently come into contact with oil due to kitchen renovation or changes in usage habits. For dynamically changing environments, environmental changes can be detected, such as installing sensors near the faucet to monitor in real time whether there is oil. For example, an oil sensor based on optical principles can be used to transmit a signal to the user's mobile phone APP or smart home system via Bluetooth or Wi-Fi once the concentration of oil exceeds the set threshold. After receiving the reminder, the user chooses to replace the gasket according to the actual situation. If the faucet is in an environment where it is frequently in contact with oil, replace the silicone rubber gasket with a nitrile rubber gasket; if it is only occasionally in contact with oil, it can be replaced during regular maintenance, or a special protective coating can be used to treat the silicone rubber gasket to enhance its oil resistance. A maintenance record file is established for each faucet to record the gasket replacement time, material and other information. Combined with sensor data and usage time, the algorithm is used to predict the service life and performance changes of the gasket, and a replacement warning is sent to the user in advance to ensure that the faucet is always in good working condition.

[0054] In another technical solution, the middle thickness of the special-shaped structure 110 is 2-8 mm, the edge thickness is 0.5-3 mm; and the diameter of the assembly hole is 5-12 mm.

[0055] In the above technical solution, specifically, the middle thickness of the special-shaped structure 100 is 5 mm, providing structural support for the flexible gasket 1, and the edge thickness is 1.2 mm, ensuring the elastic deformation sensitivity of the flexible gasket 1. The special-shaped structure 110 is linearly thinned from the middle to the edge at a 15° cone angle to avoid stress concentration. When the faucet is turned on, the water pressure (0.2-0.6 MPa) acts on the bottom of the gasket, the edge elastically deforms outward, and the water flows smoothly through the water hole; when the faucet is turned off, after the water pressure disappears, the rubber elasticity resets the edge and fits with the sealing surface of the inner wall of the joint, and the residual water is completely blocked, achieving "instant off and stop".

[0056] Specifically, the assembly hole 200 is located at the center of the water joint 2. It is a circular hole with a diameter of 8.2 mm and a depth of 6 mm. It is compatible with the snap-fit ​​structure of the flexible gasket. The two use an interference fit (the interference amount is 0.2 mm) to ensure that the flexible gasket can be firmly installed on the water joint.

[0057] In another technical solution, in areas where the water pressure is greater than 0.3 MPa, the middle thickness of the special-shaped structure is 5 to 8 mm, and the edge thickness is 1.5 to 3 mm; in areas where the water pressure is less than 0.1 MPa, the middle thickness of the special-shaped structure is 2 to 5 mm, and the edge thickness is 0.5 to 1.5 mm; In areas where the water pressure is greater than 0.3 MPa, the diameter of the assembly hole is 8-12 mm, the number of water holes is 8-10, the diameter of the water holes is 5-6 mm, the total height of the water joint is 20-25 mm, and the inner surface roughness of the water joint is 2.0-3.0 μm; in areas where the water pressure is less than 0.1 MPa, the diameter of the assembly hole is 5-8 mm, the number of water holes is 4-6, the diameter of the water holes is 5-7 mm, the total height of the water joint is 15-20 mm, and the inner surface roughness of the water joint is 1.6-2.0 μm.

[0058] In the above technical solution, specifically, in areas where the water pressure is greater than 0.3MPa, the flexible gasket 1 uses food-grade silicone rubber (hardness Shore A 50-60), which is resistant to high temperature and aging. The middle thickness of the special-shaped structure is 7 mm (providing high compressive support), and the edge thickness is 2.5 mm (balancing elastic deformation and sealing durability); thickness variation: linearly decreasing from the center to the edge at a cone angle of 15° to avoid stress concentration. The top diameter of the buckle structure 100 is 9 mm, the bottom diameter is 11 mm, and the chamfer is 45°; it has an interference fit with the assembly hole of the water joint 2 (interference amount 0.3 mm). The water joint 2 uses 316 stainless steel (corrosion resistance, high mechanical strength), the assembly hole diameter is 10 mm (tolerance ±0.1mm); there are 10 water holes, with a diameter of 5.5 mm, evenly distributed around the assembly hole (hole spacing 12 mm); the total height is 22 mm (adapting to the short flow channel requirements under high water pressure). The roughness of the inner side of the water joint is 2.5 μm; in areas where the water pressure is less than 0.1 MPa, the flexible gasket 1 is made of nitrile rubber (hardness Shore A 40-50), which is oil-resistant and highly elastic. The middle thickness of the special-shaped structure is 4 mm (taking into account both support and low-pressure sensitivity), and the edge thickness is 0.8 mm (quick response to low water pressure reset); the thickness change is linearly decreasing from the center to the edge with a cone angle of 20° to avoid stress concentration. The top diameter of the buckle structure 100 is 6 mm, the bottom diameter is 8 mm, and the chamfer is 30°; it has an interference fit with the assembly hole of the water joint 2 (interference amount 0.3 mm). The water joint 2 uses H62 brass rod (easy to process, low cost), the assembly hole diameter is 6 mm (tolerance ±0.1 mm); there are 4 water holes, with a diameter of 6.5 mm, evenly distributed around the assembly hole (hole spacing 10 mm); the total height is 18 mm (adapting to the short flow channel requirements under high water pressure). The roughness of the inner surface of the water joint is 1.8 μm. By differentially designing the key parameters of the flexible gasket and the water joint, it can accurately adapt to different water pressure environments, while ensuring the instant on / off function, while optimizing the sealing, durability and cost-effectiveness.

[0059] The roughness of the inner side surface of the water joint can be achieved by providing a sealing layer 220 with a surface roughness of 1.6-3.2 μm on the inner side surface of the water joint 2 .

[0060] Specifically, H62 brass bar (copper content 60% to 63%) is selected for water-through joint 2 as an example, which has excellent corrosion resistance and machining performance. Rough machining: The brass bar is processed into a water-through joint blank by a CNC lathe, and a 0.1 to 0.2 mm margin is reserved for the inner diameter; Cleaning: An ultrasonic cleaning machine (frequency 40 kHz) is used to remove cutting oil and metal debris; Deburring: A nylon brush is used to polish the edge of the inner hole to ensure that there are no sharp corners on the surface.

[0061] Processing technology of sealing layer 220: Sandblasting: Equipment: Air pressure sandblasting machine (working pressure 0.5-0.7 MPa); Abrasive: Alumina sand (particle size 80-120 mesh), sandblasting distance 150-200 mm, sandblasting time 30-45 seconds; Roughness control: By adjusting the sandblasting pressure and time, the surface roughness of the inner side surface reaches Ra 2.0±0.4 μm (within the range of 1.6-3.2 μm). Nickel plating (optional to enhance corrosion resistance): Process: Electroplating nickel, coating thickness 5-8 μm; Parameters: Current density 3 A / dm², plating solution temperature 50-55℃, pH value 4.0-4.5; Roughness verification: The roughness test after plating shows that the Ra value changes <0.2μm, still meeting the 1.6-3.2 μm requirement. Key parameters and test methods: Roughness test: Equipment: Portable surface roughness meter (such as Mitutoyo SJ-210), measurement mode is Ra value; Test point: Select 3 equidistant points along the inner side of the water joint axially, measure 3 times evenly in the circumferential direction, and take the average value; Qualified standard: Ra value is within the range of 1.6-3.2 μm, and the single point deviation is ≤±0.3 μm. Sealing verification: Test conditions: After assembling the water joint 2 and the flexible gasket 1, apply 0.8 MPa water pressure, and close the faucet to simulate the static pressure state; Judgment standard: No leakage within 10 minutes, and there is no visible wear mark on the contact surface between the gasket edge and the sealing layer. Process optimization and quality control: Sandblasting parameter adjustment: If the roughness is low (Ra<1.6 μm): increase the sandblasting time to 50 seconds or reduce the sandblasting distance to 100 mm; If the roughness is high (Ra>3.2μm): Replace finer sand (120-150 mesh) or reduce the sandblasting pressure to 0.4 MPa. Plating compatibility: If higher corrosion resistance is required, chemical nickel plating (electroless plating) can be used instead, which has better plating uniformity and less impact on roughness. Application example: Household kitchen faucet: The inner diameter of the water connection is 12 mm, Ra 2.5 μm after sandblasting, and the nickel plating thickness is 6 μm; the test after assembly shows that the residual water seepage in the closed state is less than 0.1 mL / min. Commercial overhead shower: Increase the inner diameter of the water connection to 20 mm, and adjust the sandblasting process to Ra 1.8 μm to ensure sealing reliability in low-pressure environments; after 10,000 cycles of testing, there is no obvious wear on the surface of the sealing layer (Ra value change <0.1 μm).

[0062] This embodiment uses a sandblasting process to accurately control the roughness of the inner side of the water joint, and combines a nickel plating process to enhance corrosion resistance. The process parameters can be flexibly adjusted to adapt to the performance requirements of different bathroom products, and have high sealing, durability and economy.

[0063] In another technical solution, the surface of the flexible gasket 1 is coated with a self-cleaning nano coating, and the self-cleaning nano coating is a titanium dioxide nano coating with a coating thickness of 50 to 100 nanometers; The titanium dioxide nano-coating is doped with silver ions with a mass fraction of 0.5% to 2% to enhance the antibacterial property and inhibit the growth of bacteria on the surface of the flexible gasket.

[0064] In the above technical scheme, the preparation process is as follows: Preparation of flexible gasket 1: After the rubber is made into a specific convex structure according to the design requirements, the prepared flexible gasket 1 is cleaned to remove impurities, oil stains, etc. on the surface. Ultrasonic cleaning, alcohol wiping and other methods can be used to ensure the surface cleanness, so as to facilitate the subsequent coating. Preparation of self-cleaning nano coating: Sol-gel method is adopted. Titanium butyl ester, anhydrous ethanol, deionized water and glacial acetic acid are mixed in a certain proportion and slowly hydrolyzed under stirring conditions to form a uniform sol. By controlling the reaction temperature, time and the proportion of each component, the viscosity and particle size of the sol are adjusted to meet the coating requirements. Add 0.5% to 2% of silver ions by mass to the prepared titanium dioxide sol, and silver salts such as silver nitrate can be used as the silver ion source, stir evenly, so that the silver ions are evenly dispersed in the sol, and the antibacterial properties of the coating are enhanced. Coating: The titanium dioxide nano sol containing silver ions is coated on the surface of the flexible gasket by spraying. Use a spray gun to spray the sol evenly on the surface of the gasket, control the spraying pressure, distance and angle, ensure that the coating thickness is uniform, and the thickness is controlled within 50 to 100 nanometers. During the coating process, it can be carried out in a well-ventilated environment to avoid the volatilization of the sol causing harm to the human body. Coating curing: After the coating is completed, the flexible gasket is placed in an oven for curing. Set the oven temperature to a certain range (such as 80 to 120°C), and the curing time is determined according to the coating thickness and sol characteristics, generally 1 to 3 hours. Through curing, the titanium dioxide sol forms a stable nano-coating structure on the surface of the gasket, improving the bonding force between the coating and the gasket. Quality inspection: Perform quality inspection on the coated flexible gasket, and use a scanning electron microscope (SEM) to observe the microstructure of the coating to ensure that the coating thickness is uniform and there are no obvious defects. The content of silver ions is detected by atomic absorption spectroscopy to ensure that it is within the specified mass fraction range. Through antibacterial performance tests, such as inhibition zone tests, the antibacterial effect of the coating is verified to ensure that it can effectively inhibit the growth of bacteria on the surface of the flexible gasket. Assembly and application: Install the qualified flexible gasket coated with self-cleaning nano-coating in the water channel inside the faucet, so that the sealing end face is closely matched with the plane of the spout joint and the plane of the aerator. In daily use, after the faucet is turned off, if there is residual water stain on the surface of the gasket, under light conditions (natural light or ultraviolet light in indoor lights), the titanium dioxide nano-coating can use photocatalysis to decompose organic matter and realize the self-cleaning function. At the same time, silver ions continue to play an antibacterial role, inhibiting the growth of bacteria, keeping the surface of the gasket clean and hygienic, extending the service life of the faucet's stop-and-turn device, and improving the user experience.

[0065] In another technical solution, a microscopic texture structure is provided on the surface of the flexible gasket in contact with the outlet water flow. The texture structure is regularly distributed in strips, and the depth of the texture is precisely controlled between 10 and 30 microns, and the width is in the range of 20 to 50 microns. The spacing between the textures is 50 to 100 microns, and the adjacent textures are parallel to each other. The texture structure is made by photolithography or micro injection molding process; Before making the texture structure, the surface of the flexible gasket is subjected to plasma treatment. After the treatment, the roughness Ra of the surface of the flexible gasket reaches 0.5 to 1.5 microns.

[0066] In the above technical scheme, the preparation process is as follows: Pretreatment of the flexible gasket: Place the gasket in a plasma treatment chamber, set the treatment parameters, such as a treatment power of 100 to 150 W, a treatment time of 5 to 10 minutes, so that the roughness Ra of the gasket surface reaches 0.5 to 1.5 microns, increase the surface activity, and improve the bonding force between the subsequent texture structure and the gasket. Texture structure design and production mold preparation: Determine that the texture structure is a regular strip distribution, the texture depth is accurately controlled between 10 and 30 microns, the width is in the range of 20 to 50 microns, the spacing between the textures is 50 to 100 microns, and the adjacent textures are parallel to each other. According to the designed texture structure, a mold is made by photolithography. First, a photoresist is coated on the silicon wafer, and it is exposed through a designed photolithography mask. After exposure, it is developed to remove the unnecessary photoresist, and a groove pattern opposite to the texture structure is formed on the silicon wafer, which is used as a mold. Texture structure production: A micro-injection molding process is used to place the plasma-treated silicone rubber gasket into the mold. Set appropriate injection molding parameters on the injection molding machine, such as injection molding temperature of 150-180℃, injection molding pressure of 5-8MPa, and injection molding time of 10-20 seconds, so that the silicone rubber fills the groove of the mold to form the required texture structure. After the injection molding is completed, carefully remove the gasket and check whether the texture structure is complete and clear, and whether the size meets the requirements. Quality inspection and evaluation: Use atomic force microscope (AFM) or scanning electron microscope (SEM) to perform microscopic inspection on the prepared texture structure, measure the depth, width and spacing of the texture, and ensure that it is within the specified range. Perform water flow test on the flexible gasket with texture structure, observe the state of water flow passing through the gasket, and evaluate the effect of the texture structure on the water flow, such as whether it plays a role in dispersing the water flow and reducing the splashing of water. If it is found that the texture structure does not meet the requirements or has a poor effect on the water flow, adjust the manufacturing process parameters or remake the mold for improvement. Installation and application: Install the prepared and qualified flexible gasket with texture structure into the internal waterway of the shower faucet, and ensure that its sealing end face is tightly matched with the plane of the spout joint and the plane of the bubbler. When using the shower faucet, water flows through the surface of the flexible gasket with a textured structure. The textured structure can guide the water flow, making it more evenly dispersed, reducing splashes, and improving the comfort and user experience of the shower.

[0067] The surface energy is increased by the microscopic roughening treatment, thereby improving the adhesion stability of the texture structure on the flexible gasket 1. The texture structure, combined with the self-cleaning nano coating, can guide the water flow to better flush the surface of the flexible gasket, improve the self-cleaning effect, and make it easier for impurities to be washed away by the water flow.

[0068] In another technical solution, an internal thread is provided in the faucet internal water channel 4 at the faucet bend 3 on the faucet body and at the connection position with the water joint 2, the water joint 2 is provided with an external thread matching the internal thread, and a sealing ring is provided at the connection between the internal thread and the external thread.

[0069] In the above technical solution, the faucet elbow 3 and the faucet internal water channel 4 are cast with H62 brass, the inner wall is precisely polished (roughness Ra≤1.6 μm), the diameter of the faucet internal water channel 4 is 12 mm; the internal thread specification is G1 / 2 (ISO 228 standard), the thread length is 8 mm, the pitch is 1.814 mm, and it is located at the outlet of the faucet internal water channel 4. The water joint 2 is made of brass nickel-plated (plating thickness 5 μm), the external thread specification is G1 / 2, and it matches the internal thread of the faucet internal water channel 4; external thread processing: CNC lathe processing, thread tolerance grade 6H, lead error ≤0.05 mm; sealing groove design: an annular sealing groove (width 1.5 mm, depth 1.2 mm) is processed at the root of the thread for installing the sealing ring. Sealing ring: material: fluororubber (FKM), temperature resistance range -20°C to 200°C, water pressure resistance ≥1.6MPa; size: cross-sectional diameter 2.4 mm (fill the sealing groove gap after compression). Processing of internal thread of water channel 4 inside the faucet: Use G1 / 2 tap (HSS material) to tap the outlet end of water channel 4 inside the faucet, with a tapping depth of 10 mm; Thread detection: Verify the tolerance through the thread gauge (GO / NO-GO gauge) to ensure that the water connector 2 can be screwed in smoothly. Processing of external thread of water connector 2: CNC lathe turns the external thread, and the thread diameter tolerance is controlled within ±0.02 mm; Nickel plating (thickness 5 μm) is applied to the thread surface to enhance corrosion resistance. Installation of sealing ring: Insert the fluororubber sealing ring into the sealing groove of water connector 2 to ensure that there is no distortion or damage; Apply a small amount of silicone-based grease (food grade) to reduce assembly friction. Threaded connection assembly: Align water connector 2 with the internal thread of water channel 4 inside the faucet, and manually pre-screw 3 to 4 turns to ensure that the thread is aligned; Use a torque wrench (set value 15 N·m) to tighten water connector 2 until the compression of the sealing ring reaches 30%-40%; Check whether the sealing ring is evenly exposed in the sealing groove without local extrusion or breakage. Sealing verification and testing: Static water pressure test: Apply 1.6 MPa water pressure to the internal water channel 4 of the assembled faucet for 30 minutes; Qualification standard: No leakage at the threaded connection, no displacement or deformation of the sealing ring. Hot and cold cycle test: Alternately pass 5°C cold water and 80°C hot water (15 minutes each), cycle 100 times; Qualification standard: No hardening or expansion of the sealing ring, no loosening at the threaded connection. Durability test: Simulate frequent opening and closing (500 times a day), and test continuously for 30 days; Qualification standard: The wear of the sealing ring is less than 0.1mm, and there is no slipping of the thread. Auxiliary optimization measures: Double sealing design (optional): Add an O-ring (made of EPDM) to the end face of the water joint 2 to form redundant protection with the thread seal; The compression of the O-ring is controlled at 20% to 25% to avoid excessive deformation. Thread anti-loosening treatment: Apply low-strength thread glue (such as Loctite 222) to the thread engagement section to prevent loosening caused by vibration; during disassembly, the glue can be softened by heating (120°C) to facilitate maintenance.

[0070] Application Examples Household basin faucet: The internal thread of the faucet elbow 3 is G1 / 2, and the external thread of the water joint 2 matches. After assembly, it passes the 0.8MPa water pressure test; after one year of alternating hot and cold use, the hardness change of the sealing ring is ≤5 Shore A, and there is no leakage.

[0071] Commercial kitchen faucet: adopts double sealing design, O-ring + threaded sealing ring, to withstand frequent high temperature and high pressure washing; the pressure test is increased to 2.0 MPa, and the sealing performance still meets the standards.

[0072] Conclusion: This solution achieves an efficient sealed connection between the water joint 2 and the internal water channel 4 of the faucet through precision thread processing, fluororubber sealing ring optimization and strict assembly process, and has both pressure resistance, temperature resistance and long life. Key process parameters (such as torque control and sealing ring compression) can be adapted to different application scenarios to ensure the reliability of the "once-and-off" faucet under complex working conditions.

[0073] The present invention also provides a sanitary ware product, which includes the instant-on / off faucet structure, wherein the sanitary ware product can be various sanitary ware products such as faucets, overhead showers, and spray heads.

[0074] Although the technical solution of the present invention has been disclosed as above, it is not limited to the applications listed in the specification and implementation methods. It can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. The instant-on / off faucet structure is characterized by: include: A flexible gasket, with a buckle structure on the top and a special-shaped structure with a decreasing thickness from the center to the edge of the flexible gasket on the bottom, and the top of the buckle structure is arranged toward the direction of water discharge from the faucet; A water-passing joint, which is provided with an assembly hole adapted to the buckle structure, the top of the buckle structure passes through the assembly hole and is detachably connected to the assembly hole, and the bottom edge of the special-shaped structure contacts the inner side of the water-passing joint; the assembly hole is located at the center of the water-passing joint, and a plurality of water-passing holes are evenly distributed around the assembly hole; The flexible gasket and the water-passing joint are installed in the water channel inside the faucet body and close to the water outlet.

2. The instant-on / off faucet structure according to claim 1, characterized in that: The kitchen faucet uses nitrile rubber gaskets, the bathroom basin faucet uses silicone rubber gaskets, and the shower faucet uses heat-resistant silicone rubber gaskets. The working temperature range of the heat-resistant silicone rubber gasket is -50℃~250℃; Among them, 2% to 5% of organic montmorillonite is added to nitrile rubber to improve heat resistance, and 3% to 8% of fumed silica is added to silicone rubber to enhance tensile strength and oil resistance.

3. The instant-on / off faucet structure according to claim 1, characterized in that: The flexible gasket is a silicone rubber gasket or a nitrile rubber gasket; the buckling structure is provided with a chamfer, the chamfer is an arc or an angle of 30 to 60 degrees, and the top diameter of the buckling structure is 1.5 to 3 mm smaller than the bottom diameter.

4. The instant-on / off faucet structure according to claim 1, characterized in that: The middle thickness of the special-shaped structure is 2 to 8 mm, and the edge thickness is 0.5 to 3 mm; the diameter of the assembly hole is 5 to 12 mm.

5. The instant-on / off faucet structure according to claim 4, characterized in that: In areas where the water pressure is greater than 0.3 MPa, the middle thickness of the special-shaped structure is 5 to 8 mm, and the edge thickness is 1.5 to 3 mm; in areas where the water pressure is less than 0.1 MPa, the middle thickness of the special-shaped structure is 2 to 5 mm, and the edge thickness is 0.5 to 1.5 mm; In areas where the water pressure is greater than 0.3 MPa, the diameter of the assembly hole is 8-12 mm, the number of water holes is 8-10, the diameter of the water holes is 5-6 mm, the total height of the water joint is 20-25 mm, and the inner surface roughness of the water joint is 2.0-3.0 μm; in areas where the water pressure is less than 0.1 MPa, the diameter of the assembly hole is 5-8 mm, the number of water holes is 4-6, the diameter of the water holes is 5-7 mm, the total height of the water joint is 15-20 mm, and the inner surface roughness of the water joint is 1.6-2.0 μm.

6. The instant-on / off faucet structure according to claim 1, characterized in that: The surface of the flexible gasket is coated with a self-cleaning nano coating, wherein the self-cleaning nano coating is a titanium dioxide nano coating with a coating thickness of 50 to 100 nanometers; The titanium dioxide nano-coating is doped with silver ions with a mass fraction of 0.5% to 2% to enhance the antibacterial property and inhibit the growth of bacteria on the surface of the flexible gasket.

7. The instant-on / off faucet structure according to claim 1, characterized in that: A microscopic texture structure is provided on the surface of the flexible gasket on the side in contact with the outlet water flow. The texture structure is distributed in a regular strip shape. The depth of the texture is precisely controlled between 10 and 30 microns, and the width is in the range of 20 to 50 microns. The spacing between the textures is 50 to 100 microns, and adjacent textures are parallel to each other. The texture structure is manufactured by photolithography or micro injection molding process. Before making the texture structure, the surface of the flexible gasket is subjected to plasma treatment. After the treatment, the roughness Ra of the surface of the flexible gasket reaches 0.5 to 1.5 microns.

8. The instant-on / off faucet structure according to claim 1, characterized in that: An internal thread is arranged in the water channel of the faucet body and at the connection position with the water outlet joint. The water outlet joint is provided with an external thread matching the internal thread. A sealing ring is arranged at the connection between the internal thread and the external thread.

9. A bathroom product, characterized in that: The invention comprises the instant-on / off faucet structure as claimed in any one of claims 1 to 8.

10. A method for turning off and stopping a faucet, characterized in that: The following steps are involved: Step 1: Install a flexible gasket and a water-passing joint in the water channel inside the faucet. A buckle structure is provided on the top of the flexible gasket, and a special-shaped structure with a decreasing thickness from the center to the edge of the flexible gasket is provided on the bottom. The top of the buckle structure passes through the assembly hole provided on the water-passing joint and is inserted into the assembly hole through interference fit. Step 2: When the faucet is turned on, water flows into the internal waterway of the faucet. Under the action of water pressure, the bottom edge of the special-shaped structure opens outward, allowing water to flow out from both sides of the special-shaped structure through the water holes on the water joint; Step 3. When the faucet is turned off, the water pressure in the water channel of the faucet drops rapidly to near zero, the flexible gasket automatically resets due to its own elasticity, the bottom edge of the special-shaped structure fits tightly against the inner side of the water outlet joint again, and the water outlet joint automatically closes, blocking the residual water in the faucet from flowing out, thus realizing the function of instant on and off.

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