Water-saving faucet and adjusting method

Abstract

The invention discloses a water-saving faucet and an adjusting method, and belongs to the technical field of bathroom equipment. According to the technical scheme, the water-saving faucet comprises a faucet shell and a valve assembly rotationally arranged in the faucet shell, a sleeve matched with the valve assembly in position is arranged on the faucet shell, and a valve rod assembly used for controlling the valve assembly to rotate is rotationally connected into the sleeve. The valve rod assembly comprises a lower connecting part connected with the valve assembly, the lower connecting part is coaxially and slidably connected with an upper connecting part, and a positioning piece is arranged in the sleeve in a sleeved mode. By means of the matching structure of the valve rod assembly and the positioning piece, the functions of flow graded adjustment and in-gear fine adjustment are achieved through stepped matching of the elastic assembly and the one-way limiting part in the rotating process, and the problem that the flow of a traditional faucet is difficult to control accurately is solved; the device has the advantages of being convenient to operate, reliable in structure and capable of achieving flow grading adjustment and fine adjustment in gears.

Description

Technical Field

[0001] The invention belongs to the technical field of bathroom equipment, and particularly relates to a water-saving faucet and an adjustment method thereof. Background Art

[0002] As the global water shortage problem becomes increasingly prominent, water-saving technology has become a research hotspot in the field of bathroom equipment. Among them, faucets are one of the most frequently used water-using appliances in daily life. The optimization of their water-saving performance is of great significance to reducing water waste.

[0003] Current faucet flow control technologies on the market face the following key technical bottlenecks: While conventional stepless faucets are flexible, they lack clear flow rate limits, making it difficult for users to precisely control water output. This can easily lead to excessive flow rates exceeding actual requirements due to excessive rotation angles, resulting in water waste. This waste is exacerbated, particularly in public settings, by varying user habits.

[0004] While existing gear-type faucets utilize a mechanical structure to divide flow levels, they often suffer from drawbacks such as laborious gear switching, easily worn positioning mechanisms, and a lack of fine-tuning capabilities within each gear. Gear meshing or snap-on positioning mechanisms not only compromise user experience but also reduce product lifespan and fail to meet the demand for fine-tuned flow rates in scenarios like washing vegetables. While electronic sensor-based faucets offer precise control, their complex design, high cost, and dependence on electricity have limited their widespread adoption in both homes and public spaces.

[0005] These technical defects have collectively made it difficult for existing faucets to achieve effective water conservation while ensuring ease of use. There is an urgent need for a new faucet technical solution that can take into account operational convenience, structural reliability, and refined flow regulation. Summary of the Invention

[0006] The present invention provides a water-saving faucet and an adjustment method thereof to solve at least one of the above-mentioned technical problems.

[0007] The technical solution adopted in the present invention is: A water-saving faucet comprises a faucet housing and a valve assembly rotatably arranged inside the faucet housing, the faucet housing being provided with a sleeve whose position matches the valve assembly, the sleeve being rotatably connected with a valve stem assembly for controlling the rotation of the valve assembly, the valve stem assembly comprising a lower connecting part connected to the valve assembly, an upper connecting part being coaxially and slidably connected to the lower connecting part, a positioning piece being sleeved inside the sleeve, the lower end face of the positioning piece being a downwardly extending oblique mouth and a plurality of one-way limit parts being spaced apart on the oblique mouth end face, an elastic component being provided on the outer wall of the upper connecting part, an abutting part being provided on the elastic component cooperating with the oblique mouth end face of the lower end of the positioning piece and the one-way limit part, when the valve stem assembly drives the valve assembly to rotate in the direction of opening the channel, the upper connecting part is controlled to slide downward so that the abutting part crosses the next one-way limit part in the rotation direction.

[0008] Furthermore, the present application also proposes that the elastic component includes a fixing ring, which is fixedly connected to the upper connecting part, and a spring plate is fixedly connected to the outer tangential direction of the fixing ring, and the outer end of the spring plate is provided with a butt joint that cooperates with the oblique end face of the lower end of the positioning part and the limiting part.

[0009] Furthermore, the present application also proposes that the positioning member is a tubular structure attached to the inner wall of the sleeve, and several of the one-way limiting portions include a first step, a second step and a third step which are arranged in sequence along the rotation direction of the valve assembly opening channel on the lower end face of the tubular structure and extend downward step by step.

[0010] Furthermore, the present application also proposes that the positioning member is a tubular structure adhered to the inner wall of the sleeve, and the lower end face of the tubular structure has a continuous inclined surface extending downward along the rotation direction of the valve assembly opening channel, and several of the one-way limiting parts include a first one-way tooth, a second one-way tooth and a third one-way tooth arranged at intervals on the lower end face of the inclined surface.

[0011] Furthermore, the present application also proposes that the lower connecting part includes a lower valve stem, the upper connecting part includes an upper valve stem, the upper end of the lower valve stem is provided with a sliding cavity, the lower end of the upper valve stem is provided with a sliding rod slidably connected to the sliding cavity, and an elastic part is fixedly connected between the sliding rod and the sliding cavity.

[0012] Furthermore, the present application also proposes that the valve assembly includes a ball valve, which is rotatably connected to the inside of the faucet housing, and the middle part of the ball valve has a guide channel arranged concentrically with the faucet housing, and sealing rings are provided between the two sides of the ball valve and the inner wall of the faucet housing, the upper end of the ball valve is provided with a key slot, and the bottom of the lower valve stem is provided with a key shaft that cooperates with the key slot.

[0013] Furthermore, the present application also proposes that a number of anti-slip serrations are provided at intervals on the inner wall of the sleeve, and the anti-slip serrations cover the sliding area of ​​the abutment head so that the abutment head cooperates with the anti-slip serrations in both forward and reverse rotation processes.

[0014] Furthermore, the present application also proposes that a mounting rod is provided at the upper end of the upper valve stem, and a rotating wrench is mounted on the mounting rod via a bolt.

[0015] Furthermore, the present application also proposes that two sets of limit grooves are symmetrically provided on the bottom of the rotating wrench, and the limit grooves limit the rotation angle of the rotating wrench to 90 degrees, and the side wall of the sleeve is symmetrically provided with limit bosses that cooperate with the limit grooves.

[0016] Furthermore, the present application also proposes that a pressure sensor is provided at the bottom of the sliding rod, and the pressure sensor is used to sense the pressure of the elastic part. The pressure of the elastic part corresponds to the sliding distance of the sliding rod, and the sliding distance of the sliding rod corresponds to a one-way limit part that matches the position of the abutment head. The rotating wrench is provided with a gear digital display screen electrically connected to the pressure sensor to convert the pressure signal into a gear signal.

[0017] A method for regulating the flow of a water-saving faucet, the specific steps are as follows: S1. In the initial state, the faucet is in the closed state, the upper connecting portion of the valve stem assembly is kept in the upward position under the action of the elastic member, and the abutting portion on the elastic member is located at the initial position of the oblique end surface of the lower end of the positioning member; S2. Rotate the valve stem assembly in the direction of opening the water flow channel, driving the valve assembly to rotate synchronously. Before the abutment portion contacts the first one-way limit portion, the valve assembly rotates within the first adjustment range, and the water flow rate gradually increases with the increase of the rotation angle; S3. When the abutting portion rotates along with the valve stem assembly until it abuts against the first one-way limit portion, the water flow rate reaches the maximum value of the first adjustment range; S4, applying external force to make the upper connecting portion slide downward relative to the lower connecting portion and compress the elastic member, thereby driving the abutting portion to break away from the restriction of the first one-way limiting portion and cross the limiting portion; S5. The external force is removed, the elastic member returns to its original position and drives the upper connecting portion upward, causing the abutting portion to enter the second adjustment range between the first one-way limit portion and the second one-way limit portion. The valve stem assembly continues to rotate, and the water flow rate gradually increases with the increase of the rotation angle within the second adjustment range until the abutting portion and the second one-way limit portion abut against each other, reaching the maximum value in this range. S6. If the flow rate needs to be further increased, repeat steps S4-S5 so that the abutting portion sequentially crosses the subsequent one-way limit portion to enter a higher flow adjustment range. The water flow rate in each range increases with the increase of the rotation angle, and the flow adjustment range of the subsequent range is generally higher than that of the previous range. S7. When the valve stem assembly is rotated in the direction of closing the water flow channel, the abutment portion slides along the oblique end surface of the lower end of the positioning member, and successively breaks away from the restrictions of each one-way limit portion. The water flow rate gradually decreases within the corresponding range as the rotation angle decreases until the valve assembly is reset to the closed state.

[0018] Due to the adoption of the above technical solution, the beneficial effects achieved by the present invention are as follows: 1. This application fundamentally solves the problems of "stepless adjustment is prone to over-adjustment" and "fixed gear is inflexible" of traditional faucets; different flow ranges are defined by a one-way limit part, and each range can be continuously adjusted in a small range according to the rotation angle, which not only ensures the convenience of users to fine-tune according to their needs, but also prevents the flow from being unintentionally excessive through the physical obstruction of the limit part, guiding users to choose a reasonable flow, thereby achieving the purpose of water saving.

[0019] 2. When the abutment contacts the one-way limiter, the elastic force of the spring plate keeps it in close contact, providing clear gear position feedback. To shift beyond the limiter, only a small external force is required to slightly deform the spring plate, driving the abutment downward. This eliminates the effort-intensive shifting associated with traditional gear shifting mechanisms. This elastic fit not only makes operation smoother, but also absorbs some of the impact force through the deformation of the spring plate, reducing component wear and extending service life.

[0020] 3. The positioning member is a tubular structure that fits snugly against the inner wall of the sleeve. The one-way stop on its lower end is designed with a first, second, and third step, arranged in sequence along the opening direction. The steps gradually increase in height. This stepped structure provides clearer gear positions. The user can clearly sense the gear shift during rotation by the "click" felt when the abutment crosses the step. This makes it particularly suitable for scenarios requiring precise flow control, such as washing vegetables in the kitchen.

[0021] The lower end surface of the positioning member is a continuous slope extending downward in the opening direction. A first, second, and third one-way latching teeth are spaced apart on this slope. The one-way tilt angle of the latching teeth ensures that the abutment portion can only cross in the opening direction; the latching teeth block it in the opposite direction. This slope and latching tooth structure creates a smoother transition between flow ranges and a gentler operation, making it suitable for applications requiring high operational comfort, such as bathrooms.

[0022] Both structures achieve orderly division of flow ranges through one-way limiting, avoiding the problem of easy misoperation of traditional gear structures.

[0023] 4. The sliding fit structure between the lower connecting part and the upper connecting part further enhances the stability of the adjustment. The lower valve stem serves as the main body of the lower connecting part. The sliding cavity at its upper end forms a precise sliding fit with the sliding rod at the lower end of the upper valve stem. The elastic member between the two always pushes the sliding rod upward, so that the upper valve stem drives the abutment to fit tightly against the beveled end face of the positioning member. This design ensures the stable fit of the abutment with the limit part in the non-switching state, avoiding gear shifts caused by vibration or slight touches. When the gear needs to be switched, the compression and reset process of the elastic member provides a uniform damping feeling, making the operation more controllable and solving the problems of loosening and inaccurate positioning of the existing sliding structure.

[0024] 5. The anti-slip serrations on the inner wall of the sleeve cover the sliding area of ​​the abutment, ensuring contact with the serrations during both forward and reverse rotation, generating moderate friction. This design not only increases the damping effect during operation, allowing users to more precisely control the rotation angle and avoid sudden flow changes caused by excessive force; it also effectively prevents the valve stem assembly from rotating due to water impact or vibration when not in operation, ensuring the stability of the flow range and further improving product reliability.

[0025] 6. The cooperation between the limit groove and the limit boss limits the rotation angle to within 90 degrees. The mechanical hard limit method constrains the operating range to avoid valve assembly seal failure or component wear due to excessive rotation.

[0026] 7. A pressure sensor at the base of the sliding rod senses pressure changes in the elastic element in real time. Since the pressure is proportional to the distance the rod slides down, which in turn directly reflects the position of the abutment stop, the pressure signal can be converted into a visual digital signal by rotating the gear position display on the wrench. This digital display solves the problem of unclear gear position perception in purely mechanical structures, making it particularly user-friendly for users with reduced operational sensitivity, such as the elderly and children, further enhancing the product's applicability and user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 An exploded view of a specific embodiment of the present invention; Figure 2 A perspective view of a specific embodiment of the present invention; Figure 3 This is a schematic structural diagram of the faucet housing in the present invention; Figure 4 This is one of the structural diagrams of the valve body assembly in the present invention; Figure 5 This is the second structural diagram of the valve body assembly in the present invention; Figure 6 A top view of the valve body assembly of the present invention; Figure 7 Schematic diagram of the expanded structure of the positioning member in the present invention; Figure 8 For the present invention Figure 6 Middle AA section view; Figure 9 For the present invention Figure 3 A partial enlarged view of part B; Figure 10 For the present invention Figure 7 A partial enlarged view of part C in the middle; Figure 11 This is a structural diagram of Example 1 of the present invention.

[0028] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0029] In the attached figure: 1. Faucet body; 11. Sleeve; 12. Positioning member; 121. First step; 122. Second step; 123. Third step; 124. Anti-slip serrations; 1201. Inclined surface; 1202. First one-way latching tooth; 1203. Second one-way latching tooth; 1204. Third one-way latching tooth; 13. Limiting boss; 2. Ball valve; 21. Keyway; 22. Diversion channel; 23. Sealing ring; 3. Valve stem assembly; 301. Key shaft; 31. Lower valve stem; 311. Sliding cavity; 312. Elastic member; 32. Upper valve stem; 321. Sliding rod; 33. Mounting rod; 34. Retaining ring; 341. Spring plate; 342. Abutment; 4. Turning wrench; 41. Limiting groove. DETAILED DESCRIPTION

[0030] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in an exemplary manner in conjunction with the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0032] In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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.

[0033] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "implementation method", "embodiment", "one embodiment", "example" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0035] Reference Figures 1 to 11 , a water-saving faucet, comprising a faucet housing 1 and a valve assembly rotatably arranged inside the faucet housing 1, characterized in that the faucet housing 1 is provided with a sleeve 11 whose position matches the valve assembly, and a valve stem assembly 3 for controlling the rotation of the valve assembly is rotatably connected in the sleeve 11, and the valve stem assembly 3 includes a lower connecting part connected to the valve assembly, and an upper connecting part is coaxially and slidably connected to the lower connecting part, and a positioning member 12 is sleeved in the sleeve 11, and the lower end face of the positioning member 12 is an oblique mouth extending downward and a plurality of one-way limit parts are arranged at intervals on the oblique end face, and an elastic component is provided on the outer wall of the upper connecting part, and the elastic component is provided with an abutment portion that cooperates with the oblique end face of the lower end of the positioning member 12 and the one-way limit part. When the valve stem assembly 3 drives the valve assembly to rotate in the direction of opening the channel, the upper connecting part is controlled to slide downward so that the abutment portion crosses the next one-way limit part in the rotation direction.

[0036] Among them, the sleeve 11 is a tubular structure installed on the faucet housing 1, which can be specifically implemented by a stainless steel tube or an engineering plastic tube, and is used to accommodate the valve stem assembly 3 and limit its rotation path. The valve stem assembly 3 is a transmission mechanism that controls the rotation of the valve assembly, and can specifically adopt a split rod structure, and realize axial displacement through the sliding fit of the upper and lower connecting parts. The beveled end face of the positioning member 12 points to the downward-inclined annular end face, and can specifically adopt a stepped or continuous bevel 1201 structure to guide the movement trajectory of the abutment part. The one-way limiting part refers to a structure that blocks in one direction along the opening direction, and can specifically adopt a stepped platform or a latching tooth shape to limit the reverse movement of the abutment part. The elastic component refers to a connecting component with elastic deformation ability, and can specifically adopt a combination structure of a spring steel plate and a fixing ring 34, and the abutment part is precisely matched with the downward-inclined annular end face of the positioning member 12 through elastic deformation.

[0037] The faucet housing 1 serves as the supporting structure of the entire faucet. The valve assembly, which rotates within it, is the core component that controls the flow of water and its magnitude. To achieve precise control of the valve assembly, the faucet housing 1 is equipped with a sleeve 11 that aligns with the valve assembly. The valve stem assembly 3, which rotates within the sleeve 11, serves as the key transmission mechanism connecting user operation with the valve assembly's motion. The valve stem assembly 3 utilizes a split design, comprising a lower connection directly connected to the valve assembly and an upper connection that slides relative to it. This sliding fit provides the structural foundation for shifting between different gears. The lower end surface of the positioning member 12 sleeved within the sleeve 11 is designed as a downwardly extending bevel, and a number of one-way limiters are spaced apart on the bevel end surface. Together with the abutment on the elastic component on the outer wall of the upper connecting portion, a unique gear control mechanism is formed: when the user rotates the valve stem assembly 3 in the opening direction, the abutment gradually approaches the one-way limiter as the valve stem rotates. At this time, external force is required to cause the upper connecting portion to slide downward relative to the lower connecting portion so that the abutment can cross the one-way limiter and enter a higher flow adjustment range; when rotating in the opposite direction, the abutment can naturally slide along the bevel end surface and disengage the limiter without external force, thereby achieving a step-by-step reduction in flow rate. This design fundamentally solves the problems of traditional faucets such as "stepless adjustment is prone to over-adjustment" and "fixed gears are inflexible"; different flow ranges are defined by the one-way limiter, and each range can be continuously adjusted in a small range according to the rotation angle. This not only ensures the convenience of fine-tuning according to the user's needs, but also prevents the flow from being unintentionally excessive through the physical obstruction of the limiter, guiding the user to choose a reasonable flow rate, thereby achieving the purpose of water conservation.

[0038] As a specific embodiment of the elastic component in this application, refer to Figure 1 、 Figure 4 、 Figure 5 as well as Figure 8The elastic component includes a fixing ring 34, which is fixedly connected to the upper connecting part. A spring plate 341 is fixedly connected to the outer tangential direction of the fixing ring 34. The outer end of the spring plate 341 is provided with a butt joint 342 that cooperates with the oblique end surface of the lower end of the positioning member 12 and the limiting part.

[0039] The retaining ring 34 is an annular connecting component, specifically rigidly connected to the upper connecting portion by welding or bolting. It is used to transmit rotational force and support the installation of the spring plate 341. The spring plate 341 is a plate-like structure with elastic deformation capabilities. Its tangential installation method allows the plate to undergo radial elastic deformation when subjected to circumferential force. The abutment 342 is a contact component provided at the end of the spring plate 341. Specifically, it can be a protrusion made of hard plastic or metal, which is used to form a contact fit with the inner wall of the sleeve 11, the beveled end surface of the positioning member 12, and the stopper.

[0040] The specific structure of the elastic component further optimizes the operational experience of gear adjustment. The elastic component includes a fixing ring 34 fixed to the upper connecting part, and a spring plate 341 connected to the outer tangential direction of the fixing ring 34 has good elastic deformation ability, and the abutment 342 at its outer end directly cooperates with the oblique end face of the positioning member 12 and the one-way limit portion. When the abutment 342 contacts the one-way limit portion, the elastic force of the spring plate 341 makes the abutment 342 fit tightly against the limit portion, forming a clear gear feedback; and when it is necessary to cross the limit portion, only a small external force needs to be applied to slightly deform the spring plate 341, driving the abutment 342 to move downward, solving the problem of laborious switching of the traditional gear structure. This elastic fit not only makes the operation smoother, but also absorbs part of the impact force through the deformation of the spring plate 341, reduces component wear, and extends service life.

[0041] As the structure of the positioning member 12 in this application, the following two embodiments can be specifically adopted: The two specific implementation forms of the positioning member 12 respectively adapt to the needs of different scenarios.

[0042] Example 1, as Figure 3 、 Figure 9 as well as Figure 11 As shown, the positioning member 12 is a tubular structure that is attached to the inner wall of the sleeve 11, and the multiple one-way limiting parts include a first step 121, a second step 122 and a third step 123 that are sequentially arranged on the lower end face of the tubular structure along the rotation direction of the valve assembly opening channel and extend downward step by step.

[0043] The tubular structure refers to an annular component that matches the shape of the inner wall of the sleeve 11. Specifically, it can be made of metal or high-strength plastic and fixed to the inner wall of the sleeve 11 by interference fit or clipping, and is used to provide a stable installation base for the one-way limit portion. The one-way limit portion refers to a blocking structure that limits the one-way rotation of the valve stem assembly 3. Specifically, it can be implemented by a stepped protrusion. The height of the first step 121, the second step 122 and the third step 123 decreases step by step along the direction of rotation, forming a three-level height difference, so that the abutment 342 needs to overcome the elastic force of the elastic component when switching between different steps. The first step 121, the second step 122 and the third step 123 refer to limit steps arranged in sequence along the opening direction of the valve assembly. Specifically, they can be formed by cutting or injection molding. The height difference between adjacent steps is 1-3 mm, which is used to divide different flow adjustment intervals and limit the sliding of the abutment 342 within the corresponding intervals.

[0044] The positioning member 12 is a tubular structure that fits against the inner wall of the sleeve 11. The one-way limit portion on its lower end surface is designed as a first step 121, a second step 122, and a third step 123 arranged in sequence along the opening direction, and the step heights extend downward step by step. This stepped structure makes the gear division clearer. During the rotation process, if downward pressure is not applied to the upper connecting part, it is impossible to drive the abutment 342 to slide downward and move across the stepped structure, so that the water flow rate can be precisely adjusted within a small range. During the rotation process, the user simultaneously applies downward pressure to the upper connecting part. When crossing the stepped structure, the user can clearly sense the gear switching through the "stuttering feeling" of the abutment 342 crossing the step, allowing the user to flexibly adjust different gears according to different water needs. It is particularly suitable for scenarios that require precise flow control, such as washing vegetables in the kitchen.

[0045] Example 2, as Figure 7 and Figure 10 As shown, the positioning member 12 is a tubular structure that is attached to the inner wall of the sleeve 11. The lower end face of the tubular structure has a continuous inclined surface 1201 extending downward along the rotation direction of the valve assembly opening channel, and a plurality of one-way limiting portions include a first one-way latch 1202, a second one-way latch 1203 and a third one-way latch 1204 that are spaced apart and arranged on the lower end face of the inclined surface 1201.

[0046] The lower end surface of the positioning member 12 is a continuous inclined surface 1201 extending downward in the opening direction. The lower end surface of the inclined surface 1201 can drive the abutting head 342 to slide downward when the abutting head 342 rotates, thereby compressing the elastic member 312. The greater the linear distance of the abutting head 342 sliding along the inclined surface 1201, the greater the deformation of the elastic member 312, and the greater the interaction force between the abutting head 342 and the inclined surface 1201. That is, in the process of the user adjusting the water flow from small to large, the damping effect of the inclined surface 1201 on the abutting head 342 also changes from small to large, thereby feedbacking the changing trend of the water flow to the user through tactile feedback, thereby providing the user with a sense of touch. In order to achieve the effect of prompting the user, a first one-way latch tooth 1202, a second one-way latch tooth 1203, and a third one-way latch tooth 1204 are arranged at intervals on the inclined surface 1201, and the one-way inclination angle of the latch teeth ensures that the abutting portion can only cross over when rotating in the closing direction, and is blocked by the latch teeth when rotating in the opening direction. If the latch teeth need to be crossed, the user needs to apply actual downward pressure on the upper connecting part to drive the abutting portion to move downward to cross the latch teeth. This structure of the inclined surface 1201 and the latch teeth can increase the damping feeling during the rotation process of the abutting portion, and feedback the user's adjustment trend of the water flow through tactile feedback. The user can flexibly adjust between the corresponding gears according to actual needs.

[0047] Both structures in Example 1 and Example 2 achieve orderly division of flow intervals through one-way limiting, avoiding the problem of easy misoperation of traditional gear structures.

[0048] As a specific embodiment of the valve stem assembly 3, refer to Figure 1 、 Figure 4 、 Figure 5 as well as Figure 8 The lower connecting part includes a lower valve stem 31, and the upper connecting part includes an upper valve stem 32. The upper end of the lower valve stem 31 is provided with a sliding cavity 311, and the lower end of the upper valve stem 32 is provided with a sliding rod 321 which is slidably connected to the sliding cavity 311. An elastic member 312 is fixedly connected between the sliding rod 321 and the sliding cavity 311.

[0049] The lower valve stem 31 is a rod-shaped component directly connected to the valve assembly and can be made of metal or high-strength plastic. It transmits rotational control to the valve assembly to achieve flow regulation. The upper valve stem 32 is a rod-shaped component connected to the control component and can be coaxially nested with the lower valve stem 31. It receives external rotational control and drives the lower valve stem 31 to rotate. The sliding cavity 311 is an internal cavity located at the top of the lower valve stem 31 and can be cylindrical or square. It accommodates the sliding rod 321 and limits its sliding path. The sliding rod 321 is an extension component located at the bottom of the upper valve stem 32 and can be a columnar structure that matches the shape of the sliding cavity 311. The sliding connection allows axial displacement of the upper valve stem 32 relative to the lower valve stem 31. The elastic member 312 is an elastic element connecting the sliding rod 321 to the sliding cavity 311 and can be a coil spring or rubber elastic body. It provides a restoring force after the sliding rod 321 is pressed downward.

[0050] When the flow rate gear needs to be switched, the upper valve stem 32 drives the sliding rod 321 to move downward along the sliding cavity 311 under the action of an external force. At this time, the elastic member 312 is compressed to store elastic potential energy. After the gear switch is completed, the external force is removed, causing the elastic member 312 to release its potential energy, pushing the sliding rod 321 and the upper valve stem 32 to reset. This sliding structure allows the upper and lower connecting parts to produce axial displacement during rotation, allowing the abutment portion to cross the one-way limit portion. At the same time, the limiting guide structure between the sliding rod 321 and the sliding cavity 311 is matched by the limiting groove 41 and the limiting flange to maintain the overall transmission function of the valve stem assembly 3 between the upper and lower connecting parts.

[0051] The sliding fit structure between the lower connecting part and the upper connecting part further enhances the stability of the adjustment. The lower valve stem 31 serves as the main body of the lower connecting part. The sliding cavity 311 at its upper end forms a precise sliding fit with the sliding rod 321 at the lower end of the upper valve stem 32. The elastic member 312 between the two always pushes the sliding rod 321 upward, so that the upper valve stem 32 drives the abutment 342 to fit tightly against the oblique end face of the positioning member 12. This design ensures that the abutment 342 is stably fitted with the limiter in the non-switching state, avoiding gear shifts caused by vibration or slight touches. When the gear needs to be switched, the compression and reset process of the elastic member 312 provides a uniform damping feeling, making the operation more controllable and solving the problems of loosening and inaccurate positioning of the existing sliding structure.

[0052] During assembly, the lower valve stem 31 can adopt a left-right split structure, and the left-right split structure is spliced ​​to form a sliding cavity 311 that slides with the sliding rod 321. After the sliding rod 321 and the elastic member 312 are assembled, the left-right split structure of the lower valve stem 31 is connected into an integrated structure by bolts.

[0053] As a specific embodiment of the valve assembly, refer to Figure 1 The valve assembly includes a ball valve 2, which is rotatably connected to the inside of the faucet housing 1. The middle part of the ball valve 2 has a guide channel 22 concentrically arranged with the faucet housing 1. Sealing rings 23 are provided between the two sides of the ball valve 2 and the inner wall of the faucet housing 1. A key groove 21 is provided at the upper end of the ball valve 2, and a key shaft 301 that cooperates with the key groove 21 is provided at the bottom of the lower valve stem 31.

[0054] The ball valve 2 is a spherical valve body that opens and closes the water flow channel by rotating about its axis. Specifically, it can be made of stainless steel or ceramic, and its outer surface forms a sealing fit with the inner wall of the faucet housing 1. The diversion channel 22 refers to a through hole that runs through the center of the ball valve 2. Its axis coincides with the axis of the faucet housing 1 to ensure the stability of the water flow direction. The sealing ring 23 is an annular sealing element provided on both sides of the ball valve 2. Specifically, it can be made of rubber or polytetrafluoroethylene material to prevent water from leaking from the gap between the ball valve 2 and the housing. The keyway 21 is a rectangular groove provided at the top of the ball valve 2, and the key shaft 301 is a raised structure provided at the bottom end of the lower valve stem 31. The two realize torque transmission through shape matching.

[0055] The ball valve 2 changes the cross-sectional area of ​​the water flow by rotating its flow channel 22. When the key shaft 301 is inserted into the key slot 21, the rotation of the lower valve stem 31 is precisely transmitted to the ball valve 2. The sealing ring 23 is compressed between the outer wall of the ball valve 2 and the inner wall of the housing, forming a double seal, effectively preventing axial leakage of the high-pressure water flow. The mating structure of the key slot 21 and the key shaft 301 allows limited vertical displacement of the valve stem assembly 3 while ensuring reliable torque transmission during rotation.

[0056] The valve assembly adopts the structure of a ball valve 2, and its connection with the valve stem assembly 3 ensures transmission efficiency. The guide channel 22 in the middle of the ball valve 2 is concentrically arranged with the faucet housing 1. When rotating, it can accurately change the overlapping area with the water channel of the housing to achieve flow regulation; the sealing rings 23 on both sides ensure the sealing performance at different opening angles to prevent water leakage. The keyway 21 at the upper end of the ball valve 2 forms a key connection with the key shaft 301 at the bottom of the lower valve stem 31. This connection method not only ensures the synchronous rotation of the valve stem assembly 3 and the ball valve 2, but also allows slight axial displacement between the two, avoiding jamming due to assembly errors, and solving the problem of easy wear and short life of traditional rigid connections.

[0057] As a preferred way of designing the structure of the sleeve 11, a number of anti-slip serrations 124 are provided at intervals on the inner wall of the sleeve 11. The anti-slip serrations 124 cover the sliding area of ​​the abutment 342 so that the abutment 342 cooperates with the anti-slip serrations 124 in both forward and reverse rotation processes.

[0058] The anti-slip serrations 124 are continuous or discontinuous raised structures formed on the inner surface of the sleeve 11. Specifically, they can be implemented using triangular or trapezoidal teeth, with the tooth surface angle matching the motion trajectory of the abutment 342. This structure prevents the abutment 342 from accidentally slipping during rotation by increasing the friction coefficient of the contact surface.

[0059] The anti-slip serrations 124 on the inner wall of the sleeve 11 cover the sliding area of ​​the abutment 342, ensuring contact with the serrations during both forward and reverse rotations, generating moderate friction. This design not only increases the damping effect during operation, allowing users to more precisely control the rotation angle and avoid sudden changes in flow caused by excessive force; it also effectively prevents the valve stem assembly 3 from rotating due to water flow impact or vibration when not in operation, ensuring the stability of the flow range and further improving product reliability.

[0060] In addition, in order to facilitate the operation of the control valve stem assembly 3, a mounting rod 33 is provided at the upper end of the upper valve stem 32, and a rotating wrench 4 is mounted on the mounting rod 33 through a bolt.

[0061] The mounting rod 33 serves as an extension of the upper valve stem 32, and its length can be adjusted according to actual needs, for example, it can be set to a cylindrical rod body of 3-5 cm. A threaded hole is machined on the top of the mounting rod 33, and a through hole is provided at the corresponding position at the bottom of the turning wrench 4. The bolt passes through the through hole and is locked with the threaded hole to form a stable connection. When the user rotates the turning wrench 4, the torque is transmitted to the upper valve stem 32 through the mounting rod 33, thereby driving the lower valve stem 31 and the valve assembly to rotate. The integrated design of the mounting rod 33 and the upper valve stem 32 avoids the problem of strength reduction caused by directly opening a hole on the top of the upper valve stem 32. At the same time, the bolt connection method facilitates the installation position adjustment or replacement and maintenance of the turning wrench 4.

[0062] This solution, through the combined structure of mounting rod 33 and bolts, ensures a reliable connection between the operating handle and the valve stem while enabling quick assembly and disassembly, facilitating handle angle adjustment or replacement after damage, while also avoiding the risk of material fatigue caused by welding. This solution addresses the issues of traditional faucet operating handles with their single installation method and difficult maintenance, achieving a modular design for the turning wrench 4. While ensuring operational stability, this solution significantly improves component replacement efficiency and reduces maintenance costs, while also allowing for flexible adjustment of the handle installation angle based on user preferences.

[0063] Furthermore, two groups of limiting grooves 41 are symmetrically provided at the bottom of the rotating wrench 4 , which limit the rotation angle of the rotating wrench 4 to 90 degrees. The side wall of the sleeve 11 is symmetrically provided with limiting bosses 13 that cooperate with the limiting grooves 41 .

[0064] The limiting groove 41 is a groove structure formed on the bottom edge of the rotating wrench 4. It can be implemented as a rectangular or arc-shaped groove, and its depth and width are designed according to the required rotation angle. The limiting boss 13 is a protrusion structure fixed to the side wall of the sleeve 11. It can be implemented as a metal or plastic protrusion integrally formed with the sleeve 11. The symmetrical layout of the two sets of limiting grooves 41 and the limiting boss 13 can form a bidirectional limit, ensuring that the rotating wrench 4 is restricted to a predetermined angle range in both the forward and reverse directions of rotation.

[0065] When the wrench 4 is operated, the cooperation between the limit grooves 41 and the limit bosses 13 limits the rotation angle to within 90 degrees. To open the water channel, the wrench 4 rotates clockwise, and the edges of the limit grooves 41 at its bottom contact the limit bosses 13 on the sleeve 11, preventing further rotation. To close the water channel, the wrench 4 rotates counterclockwise, and the other set of limit grooves 41 contact the symmetrical limit bosses 13, achieving reverse position restriction. This structure, through mechanical hard limiting, forcibly constrains the operating range, preventing valve assembly seal failure or component wear due to excessive rotation.

[0066] As an optional digital upgrade solution for this application, a pressure sensor is provided at the bottom of the sliding rod 321. The pressure sensor is used to sense the pressure of the elastic part 312. The pressure of the elastic part 312 corresponds to the sliding distance of the sliding rod 321. The sliding distance of the sliding rod 321 corresponds to the one-way limit part that matches the position of the abutment joint 342. A gear digital display screen electrically connected to the pressure sensor is provided on the rotating wrench 4 to convert the pressure signal into a gear signal.

[0067] The pressure sensor refers to a detection element mounted at the bottom of the sliding rod 321, and can be implemented as a piezoelectric or resistive sensor. It converts the mechanical deformation into an electrical signal by monitoring the pressure changes generated during the compression of the elastic member 312. The corresponding relationship between the pressure of the elastic member 312 and the sliding distance of the sliding rod 321 refers to the linear relationship between the reaction force generated when the elastic member 312 is compressed and its deformation. The gear digital display screen refers to an electronic display module integrated into the rotating wrench 4, and can be implemented as an LCD or LED screen. By connecting to the signal line of the pressure sensor, the real-time detected pressure value is converted into a preset gear number and displayed. For example, the pressure range is divided into three intervals and displayed as gears 1, 2, and 3 respectively.

[0068] The pressure sensor at the bottom of the sliding rod 321 senses pressure changes in the elastic member 312 in real time. Because the pressure level corresponds to the distance the sliding rod 321 slides downward, which in turn directly reflects the position of the one-way stopper 342, the pressure signal can be converted into a visually intuitive digital signal by rotating the gear position digital display on the wrench 4. This digital display solves the problem of unclear gear position perception in purely mechanical configurations, making it particularly user-friendly for users with reduced operational sensitivity, such as the elderly and children, further enhancing the product's applicability and user experience.

[0069] A method for regulating the flow of a water-saving faucet, the specific steps are as follows: Step 1: In the initial state, the faucet is in the closed state, the upper connecting portion of the valve stem assembly 3 is kept in the upward position under the action of the elastic member 312, and the abutting portion on the elastic member is located at the initial position of the oblique end surface of the lower end of the positioning member 12; Step 2: Rotate the valve stem assembly 3 in the direction of opening the water flow channel, driving the valve assembly to rotate synchronously. Before the abutment portion contacts the first one-way limit portion, the valve assembly rotates within the first adjustment range, and the water flow rate gradually increases with the increase of the rotation angle; Step 3: When the abutting portion rotates along with the valve stem assembly 3 to abut against the first one-way limit portion, the water flow rate reaches the maximum value of the first adjustment range; Step 4: Apply external force to slide the upper connecting portion downward relative to the lower connecting portion and compress the elastic member 312, thereby driving the abutting portion to break away from the restriction of the first one-way limiting portion and cross the limiting portion; Step 5: Remove the external force, the elastic member 312 returns to its original position and drives the upper connecting portion upward, so that the abutting portion enters the second adjustment range between the first one-way limit portion and the second one-way limit portion. Continue to rotate the valve stem assembly 3. The water flow rate gradually increases with the increase of the rotation angle in the second adjustment range until the abutting portion and the second one-way limit portion counteract each other, reaching the maximum value of the range. Step 6: If the flow rate needs to be further increased, repeat steps S4-S5 so that the abutting portion sequentially crosses the subsequent one-way limit portion to enter a higher flow adjustment range. The water flow rate in each range increases with the increase of the rotation angle, and the flow adjustment range of the subsequent range is generally higher than that of the previous range. Step 7. When the valve stem assembly 3 is rotated in the direction of closing the water flow channel, the abutment portion slides along the oblique end surface of the lower end of the positioning member 12, and successively breaks away from the restrictions of each one-way limit portion. The water flow rate gradually decreases within the corresponding range as the rotation angle decreases until the valve assembly is reset to the closed state.

[0070] Anything not described in the present invention can be achieved by adopting or drawing on existing technologies.

[0071] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0072] The foregoing is merely an embodiment of the present invention and is not intended to limit the present invention. It will be apparent to those skilled in the art that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are intended to be included within the scope of the claims of the present invention.

Claims

1. A water-saving faucet, comprising a faucet housing and a valve assembly rotatably arranged inside the faucet housing, characterized in that: The faucet housing is provided with a sleeve whose position matches the valve assembly, and a valve stem assembly for controlling the rotation of the valve assembly is rotatably connected in the sleeve; The valve stem assembly includes a lower connecting portion connected to the valve assembly, the upper connecting portion is coaxially and slidably connected to the lower connecting portion, a positioning member is sleeved in the sleeve, the lower end surface of the positioning member is an oblique opening extending downward, and a plurality of one-way limit portions are spaced apart on the oblique end surface; The outer wall of the upper connecting portion is provided with an elastic component, and the elastic component is provided with an abutment portion that cooperates with the oblique end surface of the lower end of the positioning member and the one-way limiting portion; When the valve stem assembly drives the valve assembly to rotate in the direction of opening the channel, the upper connecting portion is controlled to slide downward so that the abutting portion crosses over the next one-way limiting portion in the rotation direction.

2. A water-saving faucet according to claim 1, characterized in that: The elastic component includes a fixing ring, which is fixedly connected to the upper connecting part. A spring plate is fixedly connected to the outer tangential direction of the fixing ring. The outer end of the spring plate is provided with an abutment joint that cooperates with the oblique end surface of the lower end of the positioning part and the limiting part.

3. A water-saving faucet according to claim 2, characterized in that: The positioning member is a tubular structure attached to the inner wall of the sleeve, and the several one-way limiting parts include a first step, a second step and a third step which are sequentially arranged on the lower end surface of the tubular structure along the rotation direction of the valve assembly opening channel and extend downward step by step.

4. A water-saving faucet according to claim 2, characterized in that: The positioning member is a tubular structure that is attached to the inner wall of the sleeve. The lower end face of the tubular structure has a continuous inclined surface extending downward along the rotation direction of the valve assembly opening channel. The several one-way limiting parts include a first one-way tooth, a second one-way tooth and a third one-way tooth that are spaced apart and arranged on the lower end face of the inclined surface.

5. The water-saving faucet according to claim 1, characterized in that: The lower connecting part includes a lower valve stem, the upper connecting part includes an upper valve stem, the upper end of the lower valve stem is provided with a sliding cavity, the lower end of the upper valve stem is provided with a sliding rod slidably connected to the sliding cavity, and an elastic part is fixedly connected between the sliding rod and the sliding cavity.

6. The water-saving faucet according to claim 5, characterized in that: The valve assembly includes a ball valve, which is rotatably connected to the inside of the faucet housing. The middle part of the ball valve has a guide channel arranged concentrically with the faucet housing. Sealing rings are provided between the two sides of the ball valve and the inner wall of the faucet housing. The upper end of the ball valve is provided with a key slot, and the bottom of the lower valve stem is provided with a key shaft that cooperates with the key slot.

7. The water-saving faucet according to claim 6, characterized in that: The inner wall of the sleeve is provided with a plurality of anti-slip serrations at intervals, and the anti-slip serrations cover the sliding area of ​​the abutment head so that the abutment head cooperates with the anti-slip serrations in both forward and reverse rotation processes.

8. The water-saving faucet according to claim 5, characterized in that: A mounting rod is provided at the upper end of the upper valve stem, and a rotating wrench is mounted on the mounting rod through a bolt.

9. The water-saving faucet according to claim 8, characterized in that: Two groups of limiting grooves are symmetrically provided on the bottom of the rotating wrench, and the limiting grooves limit the rotating angle of the rotating wrench to 90 degrees. The side wall of the sleeve is symmetrically provided with limiting bosses that cooperate with the limiting grooves.

10. The water-saving faucet according to claim 8, characterized in that: A pressure sensor is provided at the bottom of the sliding rod, and the pressure sensor is used to sense the pressure of the elastic part. The pressure of the elastic part corresponds to the sliding distance of the sliding rod, and the sliding distance of the sliding rod corresponds to the one-way limit part that matches the position of the abutment head. The rotating wrench is provided with a gear digital display screen electrically connected to the pressure sensor to convert the pressure signal into a gear signal.

11. A flow regulation method for a water-saving faucet, characterized in that: Using the water-saving faucet according to any one of claims 1 to 10, the specific steps are as follows: S1. In the initial state, the faucet is in the closed state, the upper connecting portion of the valve stem assembly is kept in the upward position under the action of the elastic member, and the abutting portion on the elastic member is located at the initial position of the oblique end surface of the lower end of the positioning member; S2. Rotate the valve stem assembly in the direction of opening the water flow channel, driving the valve assembly to rotate synchronously. Before the abutment portion contacts the first one-way limit portion, the valve assembly rotates within the first adjustment range, and the water flow rate gradually increases with the increase of the rotation angle; S3. When the abutting portion rotates along with the valve stem assembly until it abuts against the first one-way limit portion, the water flow rate reaches the maximum value of the first adjustment range; S4, applying external force to make the upper connecting portion slide downward relative to the lower connecting portion and compress the elastic member, thereby driving the abutting portion to break away from the restriction of the first one-way limiting portion and cross the limiting portion; S5. The external force is removed, the elastic member returns to its original position and drives the upper connecting portion upward, causing the abutting portion to enter the second adjustment range between the first one-way limit portion and the second one-way limit portion. The valve stem assembly continues to rotate, and the water flow rate gradually increases with the increase of the rotation angle within the second adjustment range until the abutting portion and the second one-way limit portion abut against each other, reaching the maximum value in this range. S6. If the flow rate needs to be further increased, repeat steps S4-S5 so that the abutting portion sequentially crosses the subsequent one-way limit portion to enter a higher flow adjustment range. The water flow rate in each range increases with the increase of the rotation angle, and the flow adjustment range of the subsequent range is generally higher than that of the previous range. S7. When the valve stem assembly is rotated in the direction of closing the water flow channel, the abutment portion slides along the oblique end surface of the lower end of the positioning member, and successively breaks away from the restrictions of each one-way limit portion. The water flow rate gradually decreases within the corresponding range as the rotation angle decreases until the valve assembly is reset to the closed state.

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