A built-in sink drain

Abstract

The utility model discloses a fixed installation type water tank lower water head, including shell and inner shell, the inner shell and shell mutual assembly to form the structure for fixed installation in the water tank drain, the elastic bounce core subassembly, including elastic bounce core and set up on the water -proof spare of elastic bounce core, the elastic bounce core is connected in the bottom of inner shell, the water -proof spare is configured as with the sealing state of sealing cooperation with the inner shell wall with the elastic bounce action of elastic bounce core, and with the opening state of separating with the inner shell wall, the filter screen subassembly, including filter screen piece and drive piece, the drive piece passes through the filter screen piece and is slid with this filter screen piece fit, the filter screen installation edge of filter screen piece is overlapped on the inner shell to realize its assembly positioning on the inner shell, the drive piece is connected with the elastic bounce core subassembly cooperation. The new type has the characteristics such as simple structure, prevent edge leakage residue, keep clean and sanitary.

Description

Technical Field

[0001] This utility model relates to the field of drainage technology, specifically to a fixed sink drain head. Background Technology

[0002] The sink drain assembly is a key functional component in kitchens and bathrooms, responsible for water storage, drainage, and filtration. Currently, sink drain assemblies on the market are mainly divided into two types: replaceable and prefabricated.

[0003] A replaceable drain assembly is an independent, complete functional module designed to be directly installed on the existing fixed drain head of the sink without replacing it, to achieve functions such as pop-up, odor prevention, and filtration. A pre-installed drain assembly is a fixed sink drain head designed and manufactured as an original component of the sink. Its structure typically includes an outer shell and an inner shell that are directly clamped and fixed to the upper and lower parts of the sink drain outlet, forming a permanent main structure. The pop-up core and filter screen are the core functional components, directly installed in the corresponding drain cavity of the drain head.

[0004] Many existing pre-made drain assemblies have a filter screen that filters impurities, which is rigidly connected to or integrated with the movable part of the spring-loaded core that controls opening and closing. When the user presses the button, the filter screen moves up and down with the spring-loaded core. Because there must be a gap between the filter screen and the inner shell wall to ensure its smooth movement, when the filter screen moves up and down, the debris it traps is easily squeezed and leaks through the dynamic gap, resulting in difficult-to-clean hygiene problems and pipe blockage.

[0005] In view of this, this case conducts in-depth research on the above-mentioned problems and proposes a fixed water tank drain head that can effectively solve the aforementioned technical problems, thus giving rise to this case. Utility Model Content

[0006] The purpose of this utility model is to provide a fixed sink drain head, which has the characteristics of simple structure, preventing edge leakage of slag, and maintaining cleanliness and hygiene.

[0007] To achieve the above objectives, the solution of this utility model is:

[0008] A fixed sink drain head includes:

[0009] An outer shell and an inner shell, wherein the inner shell and the outer shell are assembled together to form a structure for fixed installation at the drain outlet of the water tank;

[0010] A bouncing core assembly includes a bouncing core and a water-sealing component disposed on the bouncing core. The bouncing core is connected to the bottom of the inner shell. The water-sealing component is configured to have a sealed state that seals with the inner shell wall of the inner shell and an open state that is separated from the inner shell wall as the bouncing core bounces.

[0011] A filter assembly includes a filter element and a drive element, the drive element passing through the filter element and slidingly engaging with it; the filter mounting edge of the filter element overlaps the inner shell to achieve its assembly and positioning on the inner shell; the drive element is connected to the bouncing core assembly.

[0012] The bouncing core is connected to the bottom of the inner shell via a detachable structure; the detachable structure can be a threaded connection, a snap-fit ​​connection, or a plug-in structure.

[0013] The detachable structure is a plug-in structure; the bouncing core is provided with a plug-in part, and the bottom of the inner shell is provided with a plug-in hole that matches the plug-in part.

[0014] The upper edge of the insertion hole is formed with a guide cone surface, and the insertion part is provided with an abutment part. When the bouncing core is installed in the inner shell, the abutment part abuts against the guide cone surface.

[0015] The connector is fitted with at least one sealing ring.

[0016] The filter element has a guide ring at its center, and the drive element passes through the guide ring and forms a sliding fit with it.

[0017] The driving component is a cylindrical body with one open end; the cylindrical body is sleeved on the outside of the bouncing core, and the open end of the cylindrical body abuts against the bouncing core to achieve axial overlap and limiting of the driving component on the bouncing core.

[0018] The open end of the cylinder is folded outward to form an annular outward flange; the outer diameter of the outward flange is larger than the inner diameter of the perforation on the filter element, so as to prevent the drive element from disengaging from the filter element when it moves upward.

[0019] The upper end of the inner shell is formed with an assembly flange, and the filter mounting edge is placed on the assembly flange, with the filter mounting edge covering at least two-thirds of the radial width of the assembly flange.

[0020] The upper end of the inner shell has an annular step that is lower than the mounting flange, and the outer periphery of the annular step is connected to the inner periphery of the mounting flange; the annular step and the filter screen mounting edge are vertically opposite to form an annular drainage channel, and the filter screen mounting edge is provided with an auxiliary drainage hole that communicates with the annular drainage channel.

[0021] An upper seal is provided below the assembly flange; the inner end of the upper seal extends to the annular step to form a sealing slope for pressing fit.

[0022] The upper seal has several concentric sealing ribs at the position corresponding to the assembly flange.

[0023] The upper end of the outer casing is provided with a mounting groove, and a lower sealing element is provided in the mounting groove.

[0024] The upper and / or lower surfaces of the lower seal are respectively formed with multiple sealing ribs arranged in an inner and outer ring, and a sealing deformation groove is formed between two adjacent sealing ribs.

[0025] By adopting the above solution, the present invention provides a fixed sink drain head, in which the spring core assembly is directly connected to the bottom of the inner shell, and the filter assembly is directly attached to the upper end of the inner shell through its filter installation edge, thus forming an extremely simple and integrated fixed drain head structure. This reduces the number of parts, simplifies the production and assembly process, and makes installation convenient and highly reliable.

[0026] This novel drive component slides in conjunction with the filter screen component, with the filter screen component overlapping and positioned at the upper end of the inner shell. This allows the filter screen assembly to remain completely still during the bouncing opening and closing process. The intercepted material residue loses its path to leak from the edge of the filter screen or remains stuck at the edge of the filter screen, solving the problems of edge leakage and material residue retention caused by the movement of the filter screen in the prior art. This greatly improves the reliability and effectiveness of filtration, effectively prevents blockage of sewer pipes, and is easy to clean during use, maintaining cleanliness and hygiene. Attached Figure Description

[0027] Figure 1 This is a perspective view of the first embodiment of the drain head of this utility model;

[0028] Figure 2 for Figure 1 Exploded view;

[0029] Figure 3 for Figure 1 Cross-sectional view;

[0030] Figure 4 for Figure 3 Local magnification Figure 1 ;

[0031] Figure 5 for Figure 3 Local magnification Figure 2 ;

[0032] Figure 6 This is a perspective view of Embodiment 2 of the drain head of this utility model;

[0033] Figure 7 This is a perspective view of embodiment three of the drain head of this utility model.

[0034] Label Explanation

[0035] Outer shell 1, connecting end 11, cylindrical part 12, extension part 13, mounting groove 14; inner shell 2, insertion hole 21, guide cone surface 211, assembly flange 22, annular step 23, annular drain channel 231; spring core 3, insertion part 31, abutment part 311, sealing ring 32; water sealing component 4; filter screen component 5, filter screen mounting edge 51, auxiliary drain hole 511, guide ring 52; driving component 6, outward flange 61; upper sealing component 7, sealing slope 71, concentric sealing rib 72; lower sealing component 8, sealing rib 81, sealing deformation groove 82. Detailed Implementation

[0036] The following detailed explanation of the specific implementation method will be provided.

[0037] This case involves a fixed sink drain head, such as Figure 1-7 As shown, it includes a housing, a bouncing core assembly, and a filter assembly.

[0038] The housing includes an outer shell 1 and an inner shell 2, which are assembled with the outer shell 1 to form a structure for fixed installation at the drain outlet of the sink. The connecting end 11 of the outer shell 1 is provided with a threaded portion for easy connection to a drain pipe.

[0039] Figure 1 , Figure 6 and Figure 7 Three embodiments of the housing are given. Figure 1 In the first embodiment, the shell is cylindrical in shape, and the connecting end 11 is located at the lower end of the outer shell 1. Figure 6 In the second embodiment, the shell is in the shape of an inverted cone, and the connecting end 11 is located at the lower end of the outer shell 1. Figure 7 In the third embodiment, the housing includes a cylindrical portion 12 and an extension portion 13 extending horizontally from the side of the cylindrical portion 12. The free end of the extension portion 13 extends horizontally in the axial direction to form a connecting end 11 of the housing 1.

[0040] The bouncing core assembly includes a bouncing core 3 and a water-sealing component 4 disposed on the bouncing core 3. The bouncing core 3 is connected to the bottom of the inner shell 2. The water-sealing component 4 is configured to have a sealed state that seals with the inner shell wall of the inner shell 2 and an open state that separates from the inner shell wall as the bouncing core 3 bounces. Figure 3 (As shown).

[0041] The filter assembly includes a filter element 5 and a drive element 6. The drive element 6 passes through the filter element 5 and slides in cooperation with it. The filter mounting edge 51 of the filter element 5 overlaps the inner shell 2 to achieve its assembly and positioning on the inner shell 2. The drive element 6 is connected in cooperation with the spring core 3 assembly.

[0042] This novel bouncing core assembly is directly connected to the bottom of the inner shell 2, and the filter assembly is directly attached to the upper end of the inner shell 2 via the filter mounting edge 51 to achieve assembly, forming an extremely simple fixed-mounted drain head structure. Compared with the existing technology, it reduces the number of parts, simplifies the production and assembly process, and is a complete and independent unit when it leaves the factory, without any additional conversion or adaptation parts, making it easy to install and highly reliable.

[0043] The novel drive component 6 slides in conjunction with the filter element 5, which overlaps and is positioned on the upper end of the inner shell 2. This ensures that the filter assembly remains completely stationary during the spring-loaded opening and closing process. As the primary filtration barrier, the filter element 5 has no dynamic gap between its mounting edge 51 and the inner shell 2 caused by vertical movement. Therefore, the intercepted material loses its path to leak from the edge of the mounting edge 51 or remains there, fundamentally solving the problems of edge leakage and material retention caused by filter movement in existing technologies. This greatly improves the reliability and effectiveness of filtration, effectively prevents sewer blockage, and is easy to clean during use, maintaining hygiene.

[0044] like Figure 2 In a preferred embodiment, the bouncing core 3 is connected to the bottom of the inner shell 2 via a detachable structure. The detachable structure can be a threaded connection, a snap-fit ​​connection, or a plug-in structure, as long as it allows the bouncing core 3 to be connected to the bottom of the inner shell 2.

[0045] The bouncy core assembly features a detachable connection, greatly facilitating its assembly, routine maintenance, and replacement. When the bouncy core 3 or the water-sealing component 4 wears down due to prolonged use or requires cleaning, only that part needs to be easily disassembled, improving the product's maintainability and lifespan.

[0046] Further specific embodiments, such as Figure 4 The detachable structure is a plug-in structure. The bouncing core 3 is provided with a plug-in part 31, and the bottom of the inner shell 2 is provided with a plug-in hole 21 that matches the plug-in part 31. The plug-in method has the significant advantages of being extremely convenient and quick to assemble, and is highly practical.

[0047] Furthermore, the upper edge of the insertion hole 21 is formed with a guide cone surface 211, and the insertion part 31 is provided with an abutment part 311. When the bouncing core 3 is installed on the inner shell 2, the abutment part 311 abuts against the guide cone surface 211.

[0048] By setting the guide cone surface 211, the bouncing core 3 can be automatically centered and smoothly introduced during installation, further simplifying the assembly process. The precise positioning of the abutment part 311 ensures the relative positional accuracy between the bouncing core 3 and the inner shell 2, thereby guaranteeing the coaxiality of the sealing component 4 with the inner shell wall during movement, effectively improving the reliability and consistency of the seal.

[0049] Furthermore, at least one sealing ring 32 is fitted onto the insertion part 31. This creates a static seal between the spring core 3 and the inner shell 2, effectively preventing water leakage from the assembly gap between the spring core 3 and the bottom of the inner shell 2, ensuring the sealing integrity of the entire drainage path. The sealing ring 32 also acts as a buffer, facilitating the tightness and reliable stability of the assembly between the insertion part 31 and the insertion hole 21.

[0050] like Figure 3 The filter element 5 has a guide ring 52 at its center, and the drive element 6 passes through the guide ring 52 and slides with it. Specifically, the filter element 5 has a perforation at its center, which extends upward to form the guide ring 52. The guide ring 52 provides precise guidance and constraint for the up-and-down movement of the drive element 6, ensuring that the drive element 6 always moves stably in the vertical direction without tilting or jamming, thereby reliably transmitting the user's pressing force to the spring core 3, ensuring the smoothness and reliability of the spring opening and closing action.

[0051] The driving component 6 is a cylindrical body with an open lower end. The cylindrical body is sleeved onto the outside of the bouncing core 3 through its lower opening, and the open end of the cylindrical body abuts against the bouncing core 3 to achieve axial overlap and limiting of the driving component 6 on the bouncing core 3. The combination of the sleeve and abutment methods realizes an extremely simple and efficient axial limiting and power transmission mechanism, eliminating complex connecting parts and completing force transmission and limiting through only simple structural contact.

[0052] The open end of the cylinder is folded outward to form an annular outward flange 61. The outer diameter of the outward flange 61 is larger than the inner diameter of the perforation on the filter element 5, so as to prevent the drive element 6 from disengaging from the filter element 5 when it moves upward. The outward flange 61 abuts against the bouncing core 3 to achieve axial positioning, and its outer diameter naturally forms an anti-disengagement structure between the drive element 6 and the filter element 5.

[0053] like Figure 2 , Figure 5 As shown, the upper end of the inner shell 2 is formed with an assembly flange 22, and the filter mounting edge 51 of the filter element 5 rests on the assembly flange 22, and the filter mounting edge 51 covers at least two-thirds of the radial width of the assembly flange 22.

[0054] The filter screen mounting edge 51 is placed over a large area on the mounting flange 22 of the inner shell 2, achieving stable fixation and static installation of the filter screen component 5. Because the filter screen component 5 is firmly positioned and remains stationary throughout the entire spring-loaded opening and closing process, there is no dynamic gap between its edge and the inner shell 2 caused by vertical movement. Therefore, the intercepted material residue completely loses its path of being squeezed and leaking from the filter screen edge, eliminating the possibility of edge leakage from a physical structural perspective.

[0055] Furthermore, the upper end of the inner shell 2 is formed with an annular step 23 that is lower than the mounting flange 22, and the outer periphery of the annular step 23 is connected to the inner periphery of the mounting flange 22. The annular step 23 and the filter screen mounting edge 51 are vertically opposite to form an annular drainage channel 231, and the filter screen mounting edge 51 is provided with an auxiliary drainage hole 511 that communicates with the annular drainage channel 231.

[0056] The auxiliary drainage holes 511 on the filter screen and the annular drainage channel 231 below them constitute an efficient auxiliary drainage system. When the main body of the filter screen drains slowly due to the accumulation of debris, the water can be quickly discharged through this channel, thus improving the practicality of the product and the user experience.

[0057] like Figure 5 In a preferred embodiment, an annular upper seal 7 is provided below the mounting flange 22; the inner end of the upper seal 7 extends to the annular step 23 to form a sealing bevel 71 for a pressing fit. The upper seal 7 forms a tight surface contact with the overlapping filter screen mounting edge 51, while the sealing bevel 71 can form a tight line contact or surface contact with the annular step 23, effectively preventing water leakage from the assembly interface of the inner shell 2.

[0058] Furthermore, the upper sealing element 7 has several concentric sealing ribs 72 at the corresponding mating positions with the assembly flange 22. In a specific embodiment, three ribs are provided. The concentric sealing ribs 72 generate greater local pressure under pressure, which can more effectively fill microscopic unevenness, thereby significantly improving the sealing effect of the sealing interface. Multiple sealing ribs constitute multiple lines of defense; even if one sealing rib fails, the others can still function, significantly enhancing the reliability of the seal.

[0059] like Figure 5 In a preferred embodiment, the upper end of the outer casing 1 is provided with a mounting groove 14, and an annular lower seal 8 is provided within the mounting groove 14. The dedicated mounting groove 14 on the outer casing 1 provides a stable and precise installation position for the lower seal 8, ensuring that the lower seal 8 is not easily misaligned, twisted, or detached during installation of the water tank, thus ensuring that it can fully exert its sealing performance and prevent water leakage from the installation interface between the water tank and the drain head.

[0060] Furthermore, the upper and / or lower surfaces of the lower seal 8 are respectively formed with multiple sealing ribs 81 arranged in an inner and outer ring, and a sealing deformation groove 82 is formed between two adjacent sealing ribs 81. Figure 5 In the specific embodiment given, three sealing ribs 81 are provided only on the upper surface of the lower seal 8, forming two sealing deformation grooves 82.

[0061] When the lower seal 8 is pressed against the sink countertop, each sealing rib 81 will undergo independent elastic deformation, tightly fitting the contact surface. The sealing deformation groove 82 provides space for this deformation, allowing the lower seal 8 to better adapt to the unevenness of the countertop, thus improving the leak-proof reliability of the sink installation interface.

[0062] The above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the claims of the present utility model shall fall within the scope of the claims of the present utility model.

Claims

1. A fixed water tank drain head, characterized in that, include: An outer shell and an inner shell, wherein the inner shell and the outer shell are assembled together to form a structure for fixed installation at the drain outlet of the water tank; A bouncing core assembly includes a bouncing core and a water-sealing component disposed on the bouncing core. The bouncing core is connected to the bottom of the inner shell. The water-sealing component is configured to have a sealed state that seals with the inner shell wall of the inner shell and an open state that is separated from the inner shell wall as the bouncing core bounces. A filter assembly includes a filter element and a drive element, the drive element passing through the filter element and slidingly engaging with it; the filter mounting edge of the filter element overlaps the inner shell to achieve its assembly and positioning on the inner shell; the drive element is connected to the bouncing core assembly.

2. The fixed water tank drain head as described in claim 1, characterized in that, The bouncing core is connected to the bottom of the inner shell via a detachable structure; the detachable structure can be a threaded connection, a snap-fit ​​connection, or a plug-in structure.

3. A fixed water tank drain head as described in claim 2, characterized in that, The detachable structure is a plug-in structure; the bouncing core is provided with a plug-in part, and the bottom of the inner shell is provided with a plug-in hole that matches the plug-in part.

4. A fixed water tank drain head as described in claim 3, characterized in that, The upper edge of the insertion hole is formed with a guide cone surface, and the insertion part is provided with an abutment part. When the bouncing core is installed in the inner shell, the abutment part abuts against the guide cone surface; at least one sealing ring is fitted on the insertion part.

5. A fixed water tank drain head as described in claim 1, characterized in that, The filter element has a guide ring at its center, and the drive element passes through the guide ring and forms a sliding fit with it.

6. A fixed water tank drain head as described in claim 1, characterized in that, The driving component is a cylindrical body with one open end; the cylindrical body is sleeved on the outside of the bouncing core, and the open end of the cylindrical body abuts against the bouncing core to achieve axial overlap and limiting of the driving component on the bouncing core; the open end of the cylindrical body is folded outward to form an annular outward flange; the outer diameter of the outward flange is larger than the inner diameter of the perforation on the filter element to prevent the driving component from disengaging from the filter element when it moves upward.

7. A fixed water tank drain head as described in claim 1, characterized in that, The upper end of the inner shell is formed with an assembly flange, and the filter mounting edge is placed on the assembly flange, with the filter mounting edge covering at least two-thirds of the radial width of the assembly flange.

8. A fixed water tank drain head as described in claim 7, characterized in that, The upper end of the inner shell has an annular step that is lower than the mounting flange, and the outer periphery of the annular step is connected to the inner periphery of the mounting flange; the annular step and the filter screen mounting edge are vertically opposite to form an annular drainage channel, and the filter screen mounting edge is provided with an auxiliary drainage hole that communicates with the annular drainage channel.

9. A fixed water tank drain head as described in claim 8, characterized in that, An upper sealing element is provided below the assembly flange; the inner end of the upper sealing element extends to the annular step to form a sealing slope for pressing fit; the upper sealing element has several concentric sealing ribs at the corresponding mating position with the assembly flange.

10. A fixed water tank drain head as described in claim 1, characterized in that, The upper end of the outer casing is provided with a mounting groove, and a lower sealing element is provided in the mounting groove; the upper surface and / or the lower surface of the lower sealing element are respectively formed with multiple sealing ribs arranged in an inner and outer ring, and a sealing deformation groove is formed between two adjacent sealing ribs.

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