Mechanical automatic reset single faucet

Abstract

The utility model discloses a single cock of mechanical type automatic reset relates to faucet technical field, including valve element subassembly, handle subassembly and respectively intercommunication in water inlet subassembly and water outlet subassembly of valve element subassembly. Handle subassembly contains limit position seat, handle cover, rotary torsional spring and reset spring, and limit position seat is fixedly connected valve core seat, and handle cover is fixedly connected core axle valve rod top and is set up limit position seat outside and is rotationally connected, reset spring is set up core axle valve rod, and elastic force drives it to be away from valve element subassembly, limit position seat is equipped with limit position hole, and handle cover is equipped with adaptive limit position rod in, rotary torsional spring is assembled in limit position seat, and torsion makes limit position rod and limit position hole initial misregistration. Press and rotate handle cover to two alignment, and limit position rod inserts, drives core axle valve rod intercommunication water flow. Above all, the utility model discloses pure mechanical structure realizes safety protection, convenient use, long life and low cost, and adapts to family, office and other small -size scene, provides boiling water direct -out, child -lock protection, prevents the shell from burning experience, and the industrial application value is high.

Description

Technical Field

[0001] This utility model relates to the technical field of faucets, and in particular to a mechanically automatic reset single-opening faucet. Background Technology

[0002] In daily life and office settings, water taps, as key devices for providing hot water, are widely used for brewing tea, making coffee, preparing formula, and other similar activities. However, as users' demands for convenience and safety increase, existing water supply systems are gradually revealing dual deficiencies in adaptability and safety: On the one hand, the mainstream hot water supply equipment on the market is mostly high-power instant hot water dispensers used in large venues such as airports and train stations. These devices are bulky and consume a lot of power, making them unsuitable for the installation and use needs of small scenarios such as ordinary homes, offices, or bars. On the other hand, hot water supply solutions for small scenarios mostly rely on a combination of "conventional faucet + external kettle". Users need to first get room temperature water from the faucet and then heat it in the kettle. This operation is cumbersome and cannot provide hot water directly, resulting in poor usability.

[0003] On the other hand, existing faucets designed for small-scale applications generally lack safety features specifically for hot water use. While some push-button faucets do allow for "press to dispense water, release to close," they lack child lock mechanisms. Accidental pressing by children can easily lead to hot water leakage, posing a serious risk of scalding. Furthermore, the hot water flow pipes of traditional faucets are often in direct contact with the outer casing, allowing high temperatures to easily transfer to the casing, causing it to overheat and further increasing the probability of accidental scalding. In addition, if the valve core assembly of existing faucets directly contacts hot water, prolonged exposure to high temperatures can cause seal aging and shorten the valve core's lifespan, increasing leakage problems and maintenance costs.

[0004] More importantly, existing technologies lack an integrated solution that simultaneously addresses child lock protection, anti-scalding features, high-temperature valve core protection, and direct hot water dispensing. Some solutions prioritize convenience at the expense of safety, while others rely on electronic components (such as electromagnetic locks) despite having protective structures, resulting in high costs, the need for regular parts replacement, and high failure rates. These solutions fail to meet the core requirements of "low cost, long lifespan, and high safety" in small-scale applications. Therefore, developing a faucet suitable for small-scale applications, with a purely mechanical structure, combining child lock and anti-scalding functions, and enabling direct hot water dispensing, is a key direction for addressing current technological challenges. Utility Model Content

[0005] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0006] This utility model provides a mechanically automatic reset single-turn faucet, including a main body assembly, a water inlet assembly, a valve core assembly, a handle assembly, and a water outlet assembly, wherein the water inlet assembly and the water outlet assembly are respectively connected to the valve core assembly; The handle assembly includes a limiting seat, a handle cover, a rotary torsion spring, and a return spring. The limiting seat is fixedly connected to the top of the valve core seat of the valve core assembly via a threaded connection. The handle cover is fixedly connected to the top of the valve stem of the valve core assembly via a snap-fit ​​structure. The handle cover is sleeved outside the limiting seat and rotatably connected to the limiting seat. The return spring is sleeved on the spindle valve stem. One end of the return spring abuts against the top of the handle cover and the other end abuts against the valve core assembly. Its elastic force drives the handle cover and the spindle valve stem to move away from the valve core assembly axially. The bottom of the limiting seat has a limiting hole corresponding to one side of the spindle valve rod, and the inner top of the handle cover is fixed with a limiting rod corresponding to the position of the limiting hole. The size of the limiting rod is adapted to the size of the limiting hole. The rotary torsion spring is assembled on the limiting seat. The first torsion arm of the rotary torsion spring is engaged with the side wall of the limiting seat, and the second torsion arm is engaged with the inner side wall of the handle cover. Its torque drives the handle cover to rotate relative to the limiting seat to the initial state where the axis of the limiting rod is misaligned with the axis of the limiting hole. When the handle cover is pressed and rotated until the limiting rod is aligned with the axis of the limiting hole, the limiting rod can be inserted into the limiting hole, and the handle cover drives the spindle valve rod to approach the valve core assembly axially, so as to control the valve core assembly to connect the water flow channel of the water inlet assembly and the water outlet assembly.

[0007] Furthermore: the bottom of the limiting seat is provided with a central hole post, the central hole post is integrally formed with the limiting seat and extends away from the valve core assembly; one end of the mandrel valve rod that is fixedly connected to the handle cover passes through the central hole of the central hole post and protrudes from the top of the central hole post; the return spring sleeved on the mandrel valve rod passes through the central hole of the central hole post; the rotary torsion spring is sleeved on the outer wall of the central hole post, and the inner diameter of the rotary torsion spring is clearance-fitted with the outer diameter of the central hole post.

[0008] Furthermore: at least two guide plates are evenly distributed on the bottom outer periphery of the limiting seat, the guide plates are integrally formed with the limiting seat and extend away from the valve core assembly; the guide plates extend circumferentially along the limiting seat to form a fan ring structure, and the outer wall of the guide plates slides in fit with the inner wall of the handle cover.

[0009] Furthermore: the inner wall of the handle cover is provided with an inner convex ring, the inner convex ring is integrally formed with the handle cover and extends towards the opening direction of the handle cover; the inner convex ring extends circumferentially along the handle cover to form a fan ring structure, the central angle of the fan ring is the same as the central angle of the fan ring of the guide plate, and the inner convex ring is sleeved on the outside of the guide plate and slides in cooperation with the outer wall of the guide plate; the first torsion arm of the rotary torsion spring abuts against one circumferential end of the guide plate, and the second torsion arm abuts against one circumferential end of the inner convex ring.

[0010] Further: The valve core assembly includes a valve core body, one end of the valve core seat is provided with an inlet hole and an outlet hole, and the other end is provided with a valve core slot. The valve core slot extends into the valve core seat to form a valve core cavity that connects the inlet hole and the outlet hole. The valve core body is assembled in the valve core slot. The end of the valve core body away from the valve core cavity is provided with a valve core shaft hole. The valve core rod passes through the valve core shaft hole and slides and seals with the valve core shaft hole. One end of the valve core rod extending into the valve core cavity is provided with a plunger plate. The plunger plate is fixedly connected to the valve core rod, and the plunger plate can slide along the axial direction of the valve core cavity to control the opening and closing of the water flow channel between the inlet hole and the outlet hole.

[0011] Further: The main body assembly includes a main body shell and a water outlet shell that are fixedly connected and have an internal communicating space. The valve core seat is fixedly connected to one end of the main body shell, and a threaded tube fixing ring is fixedly connected to the other end of the main body shell. The water inlet assembly includes a water inlet pipe, one end of which is used to connect to an external water source pipeline, and the other end is fixedly connected to the water inlet hole of the valve core seat. The water outlet assembly includes a first water outlet pipe, a second water outlet pipe, and a water outlet nozzle. One end of the first water outlet pipe is fixedly connected to the water outlet hole of the valve core seat, and the other end is used to connect to the water inlet end of an external water heating device. One end of the second water outlet pipe is used to connect to the water outlet end of an external water heating device, and the other end is connected to the water outlet nozzle. The water outlet nozzle is installed on the end of the water outlet shell away from the main body shell.

[0012] Furthermore: a fixed connector is provided between the water outlet and the water outlet housing; the water outlet housing has a water outlet opening; the inner wall of the water outlet opening has an internal thread; the outer wall of the fixed connector has an external thread; the fixed connector is detachably fixed to the water outlet opening through threaded engagement, and the fixed connector fixes the water outlet in the water outlet opening; a silicone sealing tube is sleeved between the second water outlet pipe and the water outlet to seal the connection between the two; a filter screen is also provided between the water outlet and the second water outlet pipe.

[0013] Furthermore: the main body shell is fixed to one end of the toothed tube fixing ring, and is also provided with an assembly toothed tube, an assembly nut and an assembly base plate; the upper end of the assembly toothed tube is threadedly connected to the toothed tube fixing ring, and the lower end passes through the opening of the assembly base plate and is threadedly connected to the assembly nut, so that the assembly nut fastens the main body component to the assembly base plate; the assembly base plate is used to install on an external platform to support and fix the main body component, and the assembly base plate is provided with a drip tray corresponding to the position of the water outlet, and a drip filter screen is fixedly connected to the top opening of the drip tray.

[0014] Compared with the prior art, the beneficial effects of this utility model are: (a) Purely mechanical child lock + automatic reset, high level of safety protection The child lock function is reliable: Through the coordinated structure of "limiting rod-limiting hole-rotating torsion spring", in the initial state, the torque of the rotating torsion spring causes the axis of the limiting rod and the limiting hole to be misaligned. Even if the handle cover is accidentally pressed, it cannot drive the spindle valve rod to move, completely preventing children from accidentally pressing the water. Only when the user actively overcomes the torque of the torsion spring and rotates the handle cover to align the limiting rod with the limiting hole can the water be pressed out, forming a double child lock protection of "rotation + pressing". The operation logic is simple and the protection effect is stable.

[0015] Automatic reset eliminates residual risk: After releasing the press, the reset spring drives the handle cover and the spindle valve rod to retract and close the valve core. At the same time, the rotating torsion spring drives the handle cover to automatically rotate and reset to the misaligned state of the limit rod and limit hole. No secondary operation by the user is required. This not only avoids water leakage caused by forgetting to close the valve, but also automatically restores the child lock protection, further improving the safety of use.

[0016] (ii) Dual-pipeline + heat insulation design, combining anti-scalding and valve core protection. Anti-scalding outer shell: It adopts a dual-pipeline design of "normal temperature purified water control + external heating of boiling water". The valve core assembly only controls the on and off of normal temperature purified water. High temperature boiling water is delivered to the water outlet through a high temperature resistant PEX hose (which does not contact the main shell or the water outlet shell), completely blocking the transmission path of high temperature to the shell and ensuring that the shell always remains at normal temperature to avoid accidental scalding by users. At the same time, the heat insulation effect can be further optimized by adding a heat insulation bracket to improve the safety of use.

[0017] Extended valve core lifespan: Since boiling water does not pass through the valve core assembly, the valve core is always in a normal temperature environment, effectively avoiding problems such as aging of seals and deformation of the valve core caused by high temperature. The service life of the valve core is more than 3 times longer than that of the traditional structure that directly contacts boiling water, significantly reducing water leakage and maintenance costs.

[0018] (III) Stable structure and easy assembly, suitable for small-scale scenarios High structural stability: The central hole at the bottom of the limit seat provides precise guidance for the reset spring and the rotary torsion spring, preventing offset and jamming when the spring is compressed / rebounded; the guide plates evenly distributed on the outer periphery slide with the inner convex ring on the inner wall of the handle cover with a gap of only 0.1-0.5mm, which can effectively limit the radial shaking during the rotation and pressing of the handle cover, ensuring smooth operation and structural stability.

[0019] Easy installation and maintenance: The main components can be quickly installed on external platforms such as kitchen countertops and office bars through the structure of "assembly threaded tube + assembly nut + assembly base plate"; the water outlet and the water outlet shell are detachably connected by threaded fixing joints, which is convenient for later replacement of water outlet or cleaning of internal filter screen; all connection structures are mechanically assembled, without complicated tools, and are suitable for the installation and maintenance needs of small scenarios.

[0020] (iv) Low cost and long lifespan, with outstanding economic efficiency and practicality. Low manufacturing cost: The entire process adopts a pure mechanical structure design, eliminating the need for electronic components (such as electromagnetic locks and sensors), thus reducing component procurement and circuit design costs; core components (such as guide plates, central hole pillars, and inner convex rings) are all manufactured using an integrated molding process, simplifying the manufacturing process and reducing production difficulty.

[0021] Long service life: The valve core assembly is kept away from high-temperature environments, and the aging rate of the seals is slow; the rotating torsion spring, return spring and other elastic components are guided by the central hole column and guide plate, so the force is even and there is no excessive wear; the first water outlet pipe is made of stainless steel hard pipe (corrosion and wear resistant) and the second water outlet pipe is made of high temperature resistant PEX flexible hose (long-term high temperature resistance of 120℃). The life of the core components is the same as the life of the faucet body, which greatly reduces the frequency and cost of later maintenance.

[0022] (v) Additional functions optimized, user experience upgraded Direct hot water output + water quality assurance: The dual-pipeline design allows room temperature purified water to be heated directly by an external hot water device, eliminating the need for intermediate transfer steps and significantly improving ease of use; at the same time, a 100-mesh stainless steel filter screen is added between the water outlet and the second water outlet pipe to filter out scale and other impurities in the hot water, ensuring water quality and preventing impurities from clogging the water outlet.

[0023] Organized water collection: A drip tray is installed on the mounting plate corresponding to the water outlet position to collect residual water droplets after the water outlet is used, preventing water droplets from splashing and contaminating the countertop; the filter screen on the top of the drip tray serves the dual purpose of "supporting the water receiving container" and "not obstructing the collection of drips", which improves both hygiene and ease of use.

[0024] In summary, this utility model achieves an integrated design of "safety protection, convenient use, long life and low cost" through a purely mechanical structure. It can be widely adapted to small scenarios such as homes, offices, and bars, providing users with a safe and convenient hot water experience with "direct hot water dispensing, child lock protection, and protection against overheating of the outer shell". It has extremely high industrial application value.

[0025] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a structural schematic diagram of the main body shell and valve core assembly of this utility model; Figure 3 This is a schematic diagram of the handle cover of this utility model; Figure 4 This is a schematic diagram of the limiting seat and the rotary torsion spring of this utility model; Figure 5 This is a cross-sectional schematic diagram of the valve core assembly and handle assembly of this utility model; Figure 6 This is a schematic diagram of the structure of the limiting rod and the limiting hole of this utility model; Figure 7 This is a cross-sectional structural diagram of the main component of this utility model; Figure 8 yes Figure 7 A magnified view of a portion of point A in the middle; Figure 9 yes Figure 7 A magnified view of a portion of point B in the middle.

[0028] The reference numerals and names in the figure are as follows: 10 Main body assembly; 11 Main body shell; 12 Assembly threaded tube; 13 Assembly nut; 14 Assembly seat plate; 15 Drip tray; 16 Drip filter screen; 17 Fixed shaft; 20 Outlet shell; 21 Inlet pipe; 22 First outlet pipe; 23 Second outlet pipe; 24 Outlet nozzle; 25 Fixed joint; 26 Sealing hose; 27 Filter screen; 30 Valve core assembly; 31 Valve core body; 32 Spindle valve stem; 33 Plunger plate; 34 Valve core seat; 35 Inlet hole; 36 Outlet hole; 37 Valve core cavity; 40 Handle assembly; 41 Handle cover; 42 Limiting rod; 43 Inner convex ring; 44 Return spring; 45 Rotary torsion spring; 46 First torsion arm; 47 Second torsion arm; 50 Limiting seat; 51 Limiting hole; 52 Center hole post; 53 Guide plate; 54 Step position. Detailed Implementation

[0029] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] Please see Figures 1 to 9 In this embodiment of the utility model, a mechanically automatic reset single-turn faucet includes a main body assembly 10, a water inlet assembly, a valve core assembly 30, a handle assembly 40, and a water outlet assembly. The water inlet assembly and the water outlet assembly are respectively connected to the valve core assembly 30. The handle assembly 40 includes a limiting seat 50, a handle cover 41, a rotary torsion spring 45, and a return spring 44. The limiting seat 50 is fixedly connected to the top of the valve core seat 34 of the valve core assembly 30 by a threaded connection. The handle cover 41 is fixedly connected to the top of the spindle valve stem 32 of the valve core assembly 30 by a snap-fit ​​structure. The handle cover 41 is sleeved on the limiting seat 50 and rotatably connected to the limiting seat 50. The return spring 44 is sleeved on the spindle valve stem 32. One end of the return spring 44 abuts against the top of the handle cover 41 and the other end abuts against the valve core assembly 30. Its elastic force drives the handle cover 41 and the spindle valve stem 32 to move away from the valve core assembly 30 axially. The bottom of the limiting seat 50 is provided with a cylindrical limiting hole 51 corresponding to one side of the spindle valve stem 32. The inner top of the handle cover 41 is fixed with a cylindrical limiting rod 42 corresponding to the position of the limiting hole 51. The diameter of the limiting rod 42 is adapted to the inner diameter of the limiting hole 51. The rotary torsion spring 45 is sleeved on the spindle valve stem 32. The first torsion arm 46 of the rotary torsion spring 45 is engaged in the side wall groove of the limiting seat 50, and the second torsion arm 47 is engaged in the inner side wall groove of the handle cover 41. Its torque drives the handle cover 41 to rotate relative to the limiting seat 50 to the initial state where the axis of the limiting rod 42 is misaligned with that of the limiting hole 51. When the handle cover 41 is pressed and rotated until the limiting rod 42 is aligned with the axis of the limiting hole 51, the limiting rod 42 can be inserted into the limiting hole 51, and the handle cover 41 drives the spindle valve rod 32 to approach the valve core assembly 30 axially, so as to control the water flow channel of the valve core assembly 30 connecting the water inlet assembly and the water outlet assembly.

[0031] Specifically, existing mechanical faucets require a second operation to close after being turned on. Although there are push-button spring-reset faucets, they lack a child lock mechanism when used in boiling water scenarios, which can easily lead to scalding if children accidentally press the button, posing a safety hazard.

[0032] This utility model addresses this problem by constructing an automatic reset faucet with a child lock function through a rotational connection structure between the limiting seat 50 and the handle cover 41, a torque drive structure of the rotary torsion spring 45, and an insertion and engagement structure between the limiting rod 42 and the limiting hole 51. In the initial state, the torque of the rotating torsion spring 45 causes the handle cover 41 to rotate relative to the limiting seat 50, causing the limiting rod 42 to be misaligned with the axis of the limiting hole 51 (e.g., Figure 6 As shown in the view, the limiting rod 42 is offset from directly above the limiting hole 51. At this time, even if the handle cover 41 is accidentally pressed, the limiting rod 42 cannot be inserted into the misaligned limiting hole 51 and cannot drive the spindle valve rod 32 to move. The valve core assembly 30 remains closed, effectively preventing accidental water discharge. When water needs to be dispensed, the handle cover 41 must first be rotated to overcome the torque of the rotating torsion spring 45, so that the limiting rod 42 is aligned with the axis of the limiting hole 51 (the chamfered structure at the end of the limiting hole 51 and the limiting rod 42 can be used to achieve axis alignment and insertion more smoothly). Then, press the handle cover 41, the limiting rod 42 is inserted into the limiting hole 51, the handle cover 41 drives the spindle valve rod 32 to move axially, triggering the valve core assembly 30 to open, and the water from the inlet assembly flows through the valve core assembly 30 and is discharged from the outlet assembly. After the water is drained, the pressure is released, and the spring force of the reset spring 44 drives the handle cover 41 and the spindle valve stem 32 to retract, and the valve core assembly 30 closes the water flow channel. At the same time, the torque of the rotating torsion spring 45 drives the handle cover 41 to rotate again, so that the limit rod 42 and the limit hole 51 return to the misaligned state, returning to the initial state of child lock protection, preventing safety risks caused by subsequent accidental pressing.

[0033] Among them, the chamfer design of the ends of the limiting hole 51 and the limiting rod 42 (such as...) Figure 3 , Figure 4(As shown in the details), the guide limit rod 42 can be inserted more smoothly when rotating and aligned, improving the ease of operation; the torsion arm of the rotating torsion spring 45 and the slot engagement structure of the limit seat 50 and the handle cover 41 ensure stable transmission of torsion spring torque, making the rotation angle of the handle cover 41 precise and controllable, and ensuring the reliability of the child lock function.

[0034] like Figures 4 to 6 As shown, preferably, the bottom of the limiting seat 50 is provided with a central hole post 52. The central hole post 52 is integrally formed with the limiting seat 50 and extends away from the valve core assembly 30. The extension height is 1 / 3-2 / 3 of the free length of the rotary torsion spring 45. One end of the spindle valve rod 32, which is fixedly connected to the handle cover 41, passes through the central hole of the central hole post 52 and protrudes from the top of the central hole post 52. The return spring 44, which is sleeved on the spindle valve rod 32, passes through the central hole of the central hole post 52. The inner diameter of the central hole is 1-6 mm larger than the outer diameter of the return spring 44. The rotary torsion spring 45 is sleeved on the outer wall of the central hole post 52, and the inner diameter of the rotary torsion spring 45 is clearance-fitted with the outer diameter of the central hole post 52.

[0035] Specifically, the limiting seat 50 is fixed to the top of the valve core seat 34 of the valve core assembly 30. To avoid interference with the axial movement of the valve stem 32, a central hole post 52 is provided in the center of the limiting seat 50 in this embodiment. Guiding the mandrel valve stem 32 and the return spring 44: The central hole of the central hole column 52 allows the mandrel valve stem 32 to pass through, and the inner diameter of the central hole is 1-6mm larger than the outer diameter of the return spring 44. This provides axial movement guidance space for the return spring 44, preventing the return spring 44 from shifting or getting stuck during compression / rebound. It also limits the radial wobble of the return spring 44 through a small gap, ensuring the stability of the axial movement of the mandrel valve stem 32, and thus ensuring the accuracy of the valve core assembly 30's opening and closing action. Limiting and guiding the retraction of the rotary torsion spring 45: The height of the central hole post 52 extending away from the valve core assembly 30 is 1 / 3 to 2 / 3 of the free length of the rotary torsion spring 45. This height provides sufficient space for the rotary torsion spring 45 to be fitted (ensuring that the torsion spring does not fall off in its natural state), and also guides the torsion spring to retract evenly along the axial direction through the outer wall of the central hole post 52 when the handle cover 41 drives the torsion spring to retract, avoiding the torsion spring from twisting or deforming due to uneven local force, ensuring the stable transmission of the torsion spring torque, and making the rotation and reset of the handle cover 41 more reliable; at the same time, the inner diameter of the rotary torsion spring 45 and the outer diameter of the central hole post 52 adopt a clearance fit, which not only facilitates the assembly of the torsion spring, but also reduces frictional resistance when the torsion spring retracts / resets, improving the operating feel.

[0036] like Figures 4 to 6As shown, preferably, at least two guide plates 53 are evenly distributed on the bottom outer periphery of the limiting seat 50. The guide plates 53 are integrally formed with the limiting seat 50 and extend in a direction away from the valve core assembly 30. The guide plates 53 extend circumferentially along the limiting seat 50 to form a fan ring structure, and the outer wall of the guide plates 53 slides in cooperation with the inner wall of the handle cover 41.

[0037] Specifically, the handle cover 41 is only fixed to the end of the spindle valve stem 32 via its inner top, requiring simultaneous rotation and pressing actions, which can easily cause wobbling due to uneven force. In this embodiment, at least two guide plates 53 are provided on the outer periphery of the bottom of the limiting seat 50: Highly coordinated design: As shown in the attached drawings, the extension height of the guide plate 53 is higher than that of the central hole post 52, and the extension height of the inner convex ring 43 on the inner wall of the handle cover 41 towards the opening of the handle cover 41 is 1 / 3 to 2 / 3 of the extension height of the guide plate 53. The advantage of this design is that the guide plate 53 can extend sufficiently towards the inner top of the handle cover 41, providing sufficient sliding guide length for the inner convex ring 43; at the same time, the inner convex ring 43 does not need to extend excessively downward, which saves material and reduces the overall weight of the handle cover 41, improving ease of operation. Structural adaptability: The guide plate 53 extends circumferentially along the limiting seat 50 to form a fan ring with a central angle of 45°-75°, which is adapted to the angle that the handle cover 41 needs to rotate (so that the limiting rod 42 is aligned / misaligned with the limiting hole 51), ensuring that when the handle cover 41 rotates, the inner convex ring 43 can slide stably along the outer wall of the fan ring of the guide plate 53. Guiding and anti-sway function: The outer wall of the guide plate 53 and the inner convex ring 43 of the handle cover 41 are fitted with a gap of 0.1-0.5mm, which not only ensures that the handle cover 41 rotates and presses smoothly, but also restricts its radial sway and improves the stability of operation; at least two evenly distributed guide plates 53 (as shown in the attached figure in a symmetrical distribution) constrain the inner convex ring 43 from multiple directions, further reducing the risk of swaying and balancing structural stability and production cost.

[0038] Advantages of multiple distribution: At least two evenly distributed guide plates 53 (such as two symmetrically distributed at 180° or three spaced at 120° intervals) can constrain the handle cover 41 from multiple directions, further reducing the risk of shaking. Compared with a full ring guide plate 53, it can reduce material usage and balance structural stability and production costs.

[0039] like Figures 4 to 6As shown, preferably, the inner wall of the handle cover 41 is provided with an inner protruding ring 43, the inner protruding ring 43 is integrally formed with the handle cover 41 and extends towards the opening direction of the handle cover 41; the inner protruding ring 43 extends circumferentially along the handle cover 41 to form a fan ring structure, the central angle of the fan ring is the same as the central angle of the fan ring of the guide plate 53, and the inner protruding ring 43 is sleeved on the outside of the guide plate 53 and slides in cooperation with the outer wall of the guide plate 53; the first torsion arm 46 of the rotary torsion spring 45 abuts against one circumferential end of the guide plate 53, and the second torsion arm 47 abuts against one circumferential end of the inner protruding ring 43.

[0040] Specifically, in order to ensure that the torque of the rotating torsion spring 45 can stably drive the handle cover 41 to rotate, this embodiment provides an inner convex ring 43 on the inner wall of the handle cover 41: Cooperation with guide plate 53: Referring to the attached figure, the central angle of the fan-shaped ring extending circumferentially along the inner convex ring 43 is consistent with that of guide plate 53, and it is sleeved on the outside of guide plate 53, slidingly cooperating with the outer wall of guide plate 53. This provides guidance for the rotation of handle cover 41, and the gap contact between inner convex ring 43 and guide plate 53 enhances the structural stability of handle cover 41 when rotating. Inner convex ring 43 extends a certain height towards guide plate 53. As can be seen from the figure, the two always maintain cooperation and do not disengage during the pressing and moving process of handle cover 41. The abutment drive of the rotary torsion spring 45: The first torsion arm 46 of the rotary torsion spring 45 abuts against the circumferential end of the guide plate 53, and the second torsion arm 47 abuts against the circumferential end of the inner convex ring 43. When the handle cover 41 is rotated to the point where the limiting rod 42 is aligned with the limiting hole 51 and is pressed open, the pressing is released, and the reset spring 44 drives the handle cover 41 to retract. At the same time, the torque of the rotary torsion spring 45, through the abutment of the two ends with the inner convex ring 43 and the guide plate 53, drives the handle cover 41 to rotate in the opposite direction, so that the limiting rod 42 and the limiting hole 51 are restored to their misalignment, thus achieving automatic reset. Initial state limit: To prevent the handle cover 41 from rotating in the reverse direction in the initial state (when not in operation), an initial step position 54 can be set at the position of the limit seat 50 corresponding to the limit rod 42. The step position 54 is used to limit the limit rod 42, so as to avoid the handle cover 41 rotating in the reverse direction for no reason, and further ensure the reliability of the child lock function.

[0041] like Figures 4 to 8As shown, preferably, the valve core assembly 30 includes a valve core body 31. One end of the valve core seat 34 has an inlet hole 35 and an outlet hole 36, and the other end has a valve core slot. The valve core slot extends into the valve core seat 34 to form a valve core cavity 37 that connects the inlet hole 35 and the outlet hole 36. The valve core body 31 is assembled in the valve core slot. One end of the valve core body 31 away from the valve core cavity 37 has a valve core shaft hole. The mandrel valve rod 32 passes through the mandrel valve shaft hole and slides and seals with the mandrel valve shaft hole. One end of the mandrel valve rod 32 extending into the valve core cavity 37 has a plunger plate 33. The plunger plate 33 is fixedly connected to the mandrel valve rod 32, and the plunger plate 33 can slide axially along the valve core cavity 37 to control the opening and closing of the water flow channel between the inlet hole 35 and the outlet hole 36.

[0042] Specifically, the valve core assembly 30 achieves water flow interruption control through the cooperative structure of the valve core body 31 and the valve core seat 34: Assembly Structure and Operation Logic: The valve core body 31 is fixed to the valve core slot of the valve core seat 34 by interference fit or threaded connection, providing stable support for the mandrel valve stem 32; the mandrel valve stem 32 passes through the valve core shaft hole of the valve core body 31, and the plunger plate 33 at its end is adapted to the valve core cavity 37. When the handle cover 41 is pressed, it drives the mandrel valve stem 32 to move towards the valve core cavity 37, and the plunger plate 33 slides axially along the valve core cavity 37, releasing the blockage at the connection between the water inlet hole 35 and the water outlet hole 36, allowing water to flow from the water inlet hole 35 through the valve core cavity 37 and out of the water outlet hole 36; after the press is released, under the action of the return spring 44, the mandrel valve stem 32 drives the plunger plate 33 to move in the opposite direction, re-blocking the connection and cutting off the water flow channel.

[0043] Sealing structure optimization: To improve sealing reliability, an O-ring is installed at the sliding fit between the valve core bore and the valve stem 32 (as shown in the attached image). Figure 8 As shown, this design prevents water from leaking from the valve core cavity 37 through the shaft hole gap. Simultaneously, a lip seal is provided on the outer periphery of the plunger plate 33. When the plunger plate 33 is in a blocked state, the lip seal fits tightly against the inner wall of the water flow channel, enhancing the water flow blocking effect. The synergistic effect of the dual sealing structure effectively avoids the risk of leakage under different operating conditions, ensuring the long-term sealing performance of the faucet.

[0044] like Figures 4 to 8As shown, preferably, the main body assembly 10 includes a main body shell 11 and a water outlet shell 20 that are fixedly connected and have an internal communicating space. The valve core seat 34 is fixedly connected to one end of the main body shell 11, and a threaded tube fixing ring is fixedly connected to the other end of the main body shell 11. The water inlet assembly includes a water inlet pipe 21, one end of which is used to connect to an external water source pipeline, and the other end is fixedly connected to the water inlet hole 35 of the valve core seat 34. The water outlet assembly includes a first water outlet pipe 22, a second water outlet pipe 23, and a water outlet 24. One end of the first water outlet pipe 22 is fixedly connected to the water outlet hole 36 of the valve core seat 34, and the other end is used to connect to the water inlet end of an external water heating device. One end of the second water outlet pipe 23 is used to connect to the water outlet end of an external water heating device, and the other end is connected to the water outlet 24. The water outlet 24 is installed on the end of the water outlet shell 20 away from the main body shell 11.

[0045] Specifically, to avoid direct contact between hot water and the valve core assembly 30, which could reduce its lifespan, this invention employs a dual-pipeline design of 'normal temperature water purification control + external heating of boiling water': Pipeline function division: The inlet pipe 21 connects to an external water source (such as the outlet pipe of a water purifier) ​​and delivers room temperature purified water to the valve core assembly 30; the valve core assembly 30 only controls the on / off of room temperature purified water, which is delivered to an external water heating device (storage-type / instantaneous water heater) for heating through the first outlet pipe 22 (a stainless steel rigid pipe, welded to the valve core seat 34 and passing through the connecting space of the main body shell 11); the heated water is delivered to the outlet nozzle 24 through the second outlet pipe 23 (high temperature resistant PEX flexible hose) for discharge, realizing direct hot water output and the valve core assembly 30 is not affected by high temperature, thus extending its service life; Piping Material and Installation Optimization: The first outlet pipe 22 is a stainless steel rigid pipe, passing through the communication space inside the main body shell 11; the second outlet pipe 23 is a high-temperature resistant PEX flexible hose, which does not contact the main body shell 11 or the outlet shell 20. The first outlet pipe 22 is made of stainless steel rigid pipe, which combines structural strength and corrosion resistance, ensuring the stability of room temperature purified water delivery; the second outlet pipe 23 is made of high-temperature resistant PEX flexible hose, which does not contact the main body shell 11 or the outlet shell 20, thus avoiding heat transfer and preventing the shell from getting hot; during actual assembly, a heat insulation bracket (such as a plastic clamp bracket) can be added between the PEX flexible hose and the shell to further optimize the hose installation and reduce the risk of heat conduction.

[0046] Secondly, the main body shell 11 and the water outlet shell 20 can be fixed by welding or by a structure of fixing shaft 17 and set screw. That is, one end of fixing shaft 17 is welded to the main body shell 11, and the other end is inserted into the corresponding fixing hole of water outlet shell 20. Set screws are used on the side wall of the fixing hole to tighten fixing shaft 17 and fixing hole, thereby realizing the connection structure of fixing water outlet shell 20 to main body shell 11.

[0047] like Figure 2 , Figure 7 and Figure 9 As shown, preferably, a fixed connector 25 is provided between the water outlet 24 and the water outlet housing 20. The water outlet housing 20 has a water outlet opening with an internal thread on the inner wall of the water outlet opening and an external thread on the outer wall of the fixed connector 25. The fixed connector 25 is detachably fixed to the water outlet opening through threaded engagement, and the fixed connector 25 fixes the water outlet 24 to the water outlet opening. A silicone sealing tube 26 is sleeved between the second water outlet pipe 23 and the water outlet 24 to seal the connection between the two. A filter screen 27 is also provided between the water outlet 24 and the second water outlet pipe 23.

[0048] Specifically, to achieve convenient installation and reliable sealing of the water outlet 24, this embodiment adopts the following structural design: The water outlet 24 is detachable and installable: the water outlet housing 20 has a water outlet opening and its inner wall has an internal thread; the fixed connector 25 has an external thread on its outer wall and can be detachably connected to the water outlet opening through thread engagement, which can securely fix the water outlet 24 in the water outlet opening, facilitating later maintenance (such as replacing the water outlet 24). Sealing and filtration optimization: A silicone sealing tube 26 is fitted at the connection between the second water outlet pipe 23 (PEX hose) and the water outlet 24. The elastic sealing properties of silicone fill the gap between the two and prevent hot water leakage. At the same time, a filter screen 27 (such as a 100-mesh stainless steel filter screen) is added between the water outlet 24 and the second water outlet pipe 23. This can filter out scale and other impurities in the hot water, improve the water quality, and prevent impurities from clogging the water outlet 24 or affecting the user experience.

[0049] like Figure 2 , Figure 7 and Figure 9 As shown, preferably, the main body shell 11 is fixed to one end of the toothed tube fixing ring, and is also provided with an assembly toothed tube 12, an assembly nut 13, and an assembly base plate 14; the upper end of the assembly toothed tube 12 is threadedly connected to the toothed tube fixing ring, and the lower end passes through the opening of the assembly base plate 14 and is threadedly connected to the assembly nut 13, so that the assembly nut 13 fastens the main body component 10 to the assembly base plate 14; the assembly base plate 14 is used to install on an external platform to support and fix the main body component 10, and the assembly base plate 14 is provided with a drip tray 15 at the position corresponding to the water outlet 24, and a drip filter screen 16 is fixedly connected to the top opening of the drip tray 15.

[0050] Specifically, to achieve convenient installation of the main component 10 and orderly collection of leaks, this embodiment adopts the following structural design: Installation and fixing of the main component 10: The mounting base plate 14 can be installed on an external platform (such as a kitchen work platform) by bolts to provide support for the main component 10; the upper end of the mounting threaded tube 12 is threadedly connected to the threaded tube fixing ring, and the lower end passes through the hole of the mounting base plate 14 and cooperates with the mounting nut 13. The main component 10 is firmly and fastened to the mounting base plate 14 by a two-way threaded connection, ensuring the stability of the overall installation of the faucet and facilitating daily use by the user; Water collection and filtration: A drip tray 15 is installed below the water outlet 24 to collect residual water droplets generated after the water outlet 24 is used, preventing water droplets from splashing and contaminating the platform. The drip filter 16 fixed to the top opening of the drip tray 15 does not obstruct water droplets from falling into the drip tray 15, and can also serve as a support structure for water containers, making it convenient for users to place cups and other containers to collect water, thus improving ease of use and hygiene.

[0051] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A mechanically automatic reset single-turn faucet, characterized in that, It includes a main body assembly (10), a water inlet assembly, a valve core assembly (30), a handle assembly (40), and a water outlet assembly, wherein the water inlet assembly and the water outlet assembly are respectively connected to the valve core assembly (30). The handle assembly (40) includes a limiting seat (50), a handle cover (41), a rotary torsion spring (45), and a return spring (44). The limiting seat (50) is fixed to the top of the valve core seat (34) of the valve core assembly (30) by a threaded connection. The handle cover (41) is fixed to the top of the valve stem (32) of the valve core assembly (30) by a snap-fit ​​structure. The handle cover (41) is sleeved outside the limiting seat (50) and rotatably connected to the limiting seat (50). The return spring (44) is sleeved on the spindle valve stem (32). One end of the return spring (44) abuts against the top of the handle cover (41) and the other end abuts against the valve core assembly (30). Its elastic force drives the handle cover (41) and the spindle valve stem (32) to move away from the valve core assembly (30) axially. The bottom of the limiting seat (50) is provided with a limiting hole (51) on one side of the spindle valve rod (32), and the inner top of the handle cover (41) is fixed with a limiting rod (42) corresponding to the position of the limiting hole (51). The size of the limiting rod (42) is adapted to the size of the limiting hole (51). The rotary torsion spring (45) is mounted on the limiting seat (50). The first torsion arm (46) of the rotary torsion spring (45) is engaged with the side wall of the limiting seat (50), and the second torsion arm (47) is engaged with the inner side wall of the handle cover (41). Its torque drives the handle cover (41) to rotate relative to the limiting seat (50) to the initial state where the axis of the limiting rod (42) is misaligned with that of the limiting hole (51). When the handle cover (41) is pressed and rotated until the limiting rod (42) is aligned with the axis of the limiting hole (51), the limiting rod (42) can be inserted into the limiting hole (51), and the handle cover (41) drives the spindle valve rod (32) to approach the valve core assembly (30) axially, so as to control the valve core assembly (30) to connect the water flow channel of the water inlet assembly and the water outlet assembly.

2. The single-turn faucet with mechanical automatic reset according to claim 1, characterized in that, The bottom of the limiting seat (50) is provided with a central hole post (52), the central hole post (52) is integrally formed with the limiting seat (50) and extends away from the valve core assembly (30); one end of the spindle valve rod (32) fixedly connected to the handle cover (41) passes through the central hole of the central hole post (52) and protrudes from the top of the central hole post (52); the return spring (44) sleeved on the spindle valve rod (32) passes through the central hole of the central hole post (52); the rotary torsion spring (45) is sleeved on the outer wall of the central hole post (52), and the inner diameter of the rotary torsion spring (45) is clearance-fitted with the outer diameter of the central hole post (52).

3. A mechanically automatic reset single-turn faucet according to claim 1, characterized in that, At least two guide plates (53) are evenly distributed on the bottom outer periphery of the limiting seat (50). The guide plates (53) are integrally formed with the limiting seat (50) and extend away from the valve core assembly (30). The guide plates (53) extend along the circumference of the limiting seat (50) to form a fan ring structure, and the outer wall of the guide plates (53) slides with the inner wall of the handle cover (41).

4. A mechanically automatic reset single-turn faucet according to claim 3, characterized in that, The inner wall of the handle cover (41) is provided with an inner protruding ring (43). The inner protruding ring (43) is integrally formed with the handle cover (41) and extends towards the opening direction of the handle cover (41). The inner protruding ring (43) extends along the circumference of the handle cover (41) to form a fan ring structure. The central angle of the fan ring is the same as the central angle of the fan ring of the guide plate (53). The inner protruding ring (43) is sleeved on the outside of the guide plate (53) and slides with the outer wall of the guide plate (53). The first torsion arm (46) of the rotary torsion spring (45) abuts against one end of the circumference of the guide plate (53), and the second torsion arm (47) abuts against one end of the circumference of the inner protruding ring (43).

5. A mechanically automatic reset single-turn faucet according to claim 1, characterized in that, The valve core assembly (30) includes a valve core body (31). One end of the valve core seat (34) has an inlet hole (35) and an outlet hole (36), and the other end has a valve core slot. The valve core slot extends into the valve core seat (34) to form a valve core cavity (37) that connects the inlet hole (35) and the outlet hole (36). The valve core body (31) is assembled in the valve core slot, and the valve core body (31) is located away from the valve core cavity (37). The valve core is provided with a valve core hole at one end, and the valve core rod (32) passes through the valve core hole and slides and seals with the valve core hole; a plunger plate (33) is provided at one end of the valve core rod (32) that extends into the valve core cavity (37), the plunger plate (33) is fixedly connected to the valve core rod (32), and the plunger plate (33) can slide along the axial direction of the valve core cavity (37) to control the opening and closing of the water flow channel between the water inlet (35) and the water outlet (36).

6. A mechanically automatic reset single-turn faucet according to claim 5, characterized in that, The main body assembly (10) includes a main body shell (11) and an outlet shell (20) that are fixedly connected and have a communicating space inside. The valve core seat (34) is fixedly connected to one end of the main body shell (11), and a threaded tube fixing ring is fixedly connected to the other end of the main body shell (11). The water inlet assembly includes a water inlet pipe (21), one end of which is used to connect to an external water source pipeline, and the other end is fixedly connected to the water inlet hole (35) of the valve core seat (34). The water outlet assembly includes a first... The system includes a first water outlet pipe (22), a second water outlet pipe (23), and a water outlet nozzle (24). One end of the first water outlet pipe (22) is fixed to the water outlet hole (36) of the valve core seat (34), and the other end is used to connect to the water inlet of an external water heating device. One end of the second water outlet pipe (23) is used to connect to the water outlet of an external water heating device, and the other end is connected to the water outlet nozzle (24). The water outlet nozzle (24) is installed on the end of the water outlet housing (20) away from the main housing (11).

7. A mechanically automatic reset single-turn faucet according to claim 6, characterized in that, A fixed connector (25) is provided between the water outlet (24) and the water outlet housing (20). The water outlet housing (20) is provided with a water outlet opening. The inner wall of the water outlet opening is provided with an internal thread. The outer wall of the fixed connector (25) is provided with an external thread. The fixed connector (25) is detachably fixed to the water outlet opening through thread engagement. The fixed connector (25) fixes the water outlet (24) to the water outlet opening. A silicone sealing tube (26) is sleeved between the second water outlet pipe (23) and the water outlet (24) to seal the connection between the two. A filter screen (27) is also provided between the water outlet (24) and the second water outlet pipe (23).

8. A mechanically automatic reset single-turn faucet according to claim 6, characterized in that, The main body shell (11) is fixed to one end of the tooth tube fixing ring, and is also provided with an assembly tooth tube (12), an assembly nut (13) and an assembly base plate (14); the upper end of the assembly tooth tube (12) is connected to the tooth tube fixing ring by a thread, and the lower end passes through the opening of the assembly base plate (14) and is connected to the assembly nut (13) by a thread, so that the assembly nut (13) fastens the main body component (10) to the assembly base plate (14); the assembly base plate (14) is used to install on an external platform to support and fix the main body component (10), and the assembly base plate (14) is provided with a drip tray (15) at the position corresponding to the water outlet (24), and a drip filter screen (16) is fixed at the top opening of the drip tray (15).

Images