Pull-out faucet structure and pull-out faucet

Abstract

This utility model discloses a pull-out structure for a faucet and a pull-out type faucet, belonging to the field of faucet technology. The technical problem it solves is that traditional pull-out faucets rely on a coil spring for reset, and the friction between the coil spring and the pipe wall leads to high resistance and noise. The pull-out structure of the faucet includes a support plate with a first support hole. A pull-out drum is rotatably inserted into the first support hole. A reset drum, offset from and parallel to the axis of the pull-out drum, is rotatably mounted on one side of the support plate. A coil spring is coiled around the outer circumference of the reset drum, and both ends of the coil spring are connected to hook slots on the reset drum and the pull-out drum, respectively, via hooks. One end of a pull rope is connected to the wall of the pull-out drum on the other side of the support plate and partially coiled around its outer circumference; the other end is connected to a telescopic hose connecting to the shower head. The pull-out faucet includes the above-mentioned pull-out structure. This structure is mainly used to achieve low-resistance, low-noise pull-out and reset of the faucet shower head, and is suitable for kitchens, bathrooms, and other scenarios.

Description

Technical Field

[0001] This utility model relates to the field of faucet technology, specifically to a pull-out structure and a pull-out faucet. Background Technology

[0002] In traditional pull-out faucet designs, the reset mechanism typically employs a built-in helical spring. This spring is installed outside the flexible retractable hose within the bend of the faucet body, and its radial elasticity enables the hose to reset. However, this design has a significant drawback: the axis of the helical spring is almost perpendicular to the axial direction of the inner wall of the bend and the outer wall of the flexible retractable hose. This results in continuous contact between the helical spring and the outer wall of the hose and the inner wall of the bend during extension and retraction, generating significant sliding friction resistance. This friction not only increases the tactile resistance when pulling the hose but also produces sharp noise due to the direct friction between the helical spring and the hose wall, severely impacting user comfort. Utility Model Content

[0003] This utility model provides a pull-out structure for a faucet and a pull-out faucet, which can solve the problems of traditional pull-out faucets relying on a spiral spring for reset, and the high resistance and noise caused by the friction between the spiral spring and the pipe wall.

[0004] To achieve these objectives and other advantages according to this utility model, a pull-out structure for a faucet is provided, comprising a support plate, a pull-out reel, a return reel, a coil spring, a pull cord, and a cover plate. The support plate has a first support hole. The pull-out reel is coaxial with and rotatably inserted into the first support hole. The return reel is offset from and parallel to the axis of the pull-out reel, and rotatably disposed on one side of the support plate. Hook grooves are provided on the wall of the pull-out reel located on one side of the support plate and on the wall of the return reel. The coil spring... Hooks are provided at both ends. The coil spring is coiled around the outer circumference of the reset drum, and the hook at one end of the coil spring is hooked into the hook groove on the reset drum. The hook at the other end of the coil spring is hooked into the hook groove on the pull-out drum. One end of the pull rope is connected to the wall of the pull-out drum located on the other side of the support plate and is partially coiled around the outer circumference of the pull-out drum. The other end of the pull rope is connected to a telescopic hose with a water shower head. The cover plate is located on one side of the support plate and is connected to the support plate by multiple screws. The coil spring is located between the cover plate and the support plate.

[0005] Preferably, in the pull-out structure of the faucet, the outer wall of the pull-out reel is provided with a storage groove, and the pull-out rope is located in the storage groove.

[0006] Preferably, in the pull-out structure of the faucet, a guide wheel coaxial with the pull-out drum is rotatably provided on the other side of the support plate. The distance between the outer circumferential surface of the guide wheel and the edge of the groove of the storage slot is less than the diameter of the pull rope, and the axial width of the guide wheel is not less than the width of the storage slot.

[0007] Preferably, in the pull-out structure of the faucet, a guide wheel shaft coaxial with the first support hole is provided on the other side of the support plate, and a limiting plate perpendicular to it is provided at the free end of the guide wheel shaft. The guide wheel is rotatably sleeved on the guide wheel shaft and located between the support plate and the limiting plate.

[0008] Preferably, in the pull-out structure of the faucet, both the pull-out drum and the return drum are provided with limiting grooves around their outer peripheries, and the coil spring is located between the two side walls of the limiting grooves.

[0009] Preferably, in the pull-out structure of the faucet, the cover plate is provided with a second support hole corresponding to the first support hole, and the pull-out drum is also rotatably inserted into the second support hole; a first support shaft coaxial with the first support hole is provided on one side of the support plate, and a second support shaft corresponding to and coaxial with the first support shaft is provided on the side of the cover plate opposite to the support plate; the reset drum is rotatably sleeved on the outer periphery of both the first and second support shafts; the limiting grooves are all located between the cover plate and the support plate.

[0010] Preferably, in the pull-out structure of the faucet, the edge of the support plate extends to one side to form a barrier, the barrier abuts against the cover plate and the width of the barrier is greater than the width of the limiting groove.

[0011] Preferably, in the pull-out structure of the faucet, a connecting sleeve is provided on the top of the other side of the support plate, and the connecting sleeve is coaxial with and detachably connected to the connecting pipe at the inlet end of the faucet body.

[0012] This utility model also provides a pull-out faucet, which includes the pull-out structure of the faucet described in any of the above technical solutions, wherein the telescopic hose is movably inserted into the faucet body, and the water spray head is located at the outlet end of the faucet body.

[0013] This utility model has at least the following beneficial effects: In this utility model, a support plate is provided with a first support hole, and a pull-out drum is rotatably inserted into the first support hole. A reset drum, coaxial with the pull-out drum, is rotatably mounted on one side of the support plate. A coiled spring is coiled around the outer circumference of the reset drum, with one end detachably connected to the wall of the reset drum and the other end detachably connected to the wall of the pull-out drum on one side of the support plate. One end of the pull rope is connected to the wall of the pull-out drum on the other side of the support plate and partially coiled around its outer circumference; the other end is connected to a telescopic hose connected to the water shower head. When pulled out, the telescopic hose drives the pull rope to pull the pull-out drum to rotate and stretch the coiled spring to store energy. When reset, the coiled spring contracts, driving the pull-out drum to reverse and retract the pull rope. The axial elastic deformation of the coiled spring and the force transmission path of the coaxial drum eliminate radial contact between the spring and the tube wall, avoiding direct contact and friction between the coiled spring and the tube wall. This effectively avoids resistance and noise caused by sliding friction. The rotational connection between the support plate and the drum further reduces mechanical friction, further achieving the technical effects of low resistance and quiet operation during the reset process.

[0014] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the pull-out structure assembly of a faucet in one of the technical solutions of this utility model; Figure 2 This is an exploded view of the pull-out structure of a faucet in one of the technical solutions of this utility model; Figure 3 This is a schematic diagram of the pull-out faucet structure in one of the technical solutions of this utility model; Figure 4 This is a schematic diagram of the structure of one side of the support plate in one of the technical solutions of this utility model. Figure 5 This is a schematic diagram of another view of the component on one side of the support plate in one of the technical solutions of this utility model; Figure 6 This is a schematic diagram showing the positional relationship between the pull-out drum, pull-out rope, and guide wheel in one of the technical solutions of this utility model; Among them, 1-connecting sleeve, 2-pull rope, 3-guide wheel, 4-extraction drum, 5-cover plate, 6-support plate, 7-first support hole, 8, 12-limiting groove, 9, 14-hook groove, 10-second support shaft, 11-second support hole, 13-reset drum, 15-coil spring, 16-hook, 17-telescopic hose, 18-inner tube, 19-water shower head, 20-faucet body, 21-connecting pipe, 22-first support shaft, 23-storage groove. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0017] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0018] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are conventional methods, and the reagents and materials described are commercially available. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to fixed connection or setting, detachable connection or setting, or integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, this utility model provides a pull-out structure for a faucet, including... The system includes a support plate 6, a pull-out drum 4, a return drum 13, a coil spring 15, a pull rope 2, and a cover plate 5. The support plate 6 has a first support hole 7. The pull-out drum 4 is coaxial with and rotatably inserted into the first support hole 7. The return drum 13 is offset from and parallel to the axis of the pull-out drum 4 and rotatably disposed on one side of the support plate 6. Hook grooves 9 and 14 are provided on the drum wall of the pull-out drum 4 on one side of the support plate 6 and on the drum wall of the return drum 13. Hooks 16 are provided at both ends of the coil spring 15. The coil spring 15 is coiled on the support plate 6. The hook 16 at one end of the reset drum 13 is hooked onto the hook groove 14 on the reset drum 13. The hook 16 at the other end of the coil spring 15 is hooked onto the hook groove 9 on the pull-out drum 4. One end of the pull rope 2 is connected to the wall of the pull-out drum 4 located on the other side of the support plate 6 and is partially coiled around the outer periphery of the pull-out drum 4. The other end of the pull rope 2 is connected to the telescopic hose 17 connected to the water shower head 19. The cover plate 5 is located on one side of the support plate 6 and is connected to the support plate 6 by multiple screws. The coil spring 15 is located between the cover plate 5 and the support plate 6.

[0020] In this faucet's pull-out structure, the support plate 6 serves as the basic load-bearing component, typically made of aluminum alloy or engineering plastic, with a positioning structure on its surface for mounting rotating parts. The pull-out drum 4 and the return drum 13 are coaxial cylindrical components, made of stainless steel or reinforced nylon, with a smooth surface to reduce friction. The coil spring 15 is a helical elastic element, made of flat spring steel, with connecting structures at both ends. The pull-out cord 2 is a soft, non-elastic cord, including but not limited to steel wire rope, nylon rope, carbon fiber rope, and other soft, non-elastic ropes or wires, possessing wear-resistant and tensile strength properties.

[0021] In this technical solution, a circular through hole is opened at the lower part of the support plate 6 as the first support hole 7. A deep groove ball bearing can be embedded in the hole, and the pull-out drum 4 is rotatably connected to the support plate 6 through the bearing. The reset drum 13 is installed on one side of the support plate 6 through two parallel short shafts. The short shafts are fixed perpendicularly to the support plate 6, and the reset drum 13 is sleeved on the short shafts and can rotate freely. The hook grooves 9 and 14 can be rectangular grooves opened on the outer wall of the drum. The top of the grooves extends inward along the axial direction of the drum to form a limiting plate. The distance between the pair of limiting plates is less than the width of the spring sheet of the coil spring 15 and greater than the thickness of the spring sheet. The hook 16 is an extension structure at both ends of the coil spring 15. It is manufactured by integral molding with the coil spring 15. Its shape is T-shaped. The vertical part of the hook 16 is connected to the coil spring 15, and the horizontal part is along the width direction of the coil spring 15 and is located in the hook groove 9 and 14, hooking onto the limiting plate. During disassembly, first adjust the vertical part of hook 16 to be perpendicular to the central axis of the drum. Then rotate the vertical part until it aligns with the gap between the vertical part and the pair of limiting plates. Then move it away from the drum to move the horizontal part away from the pair of limiting plates and disengage it from the hook grooves 9 and 14. During installation, reverse the disassembly steps. One end of the pull rope 2 passes through the hole at the end of the pull-out drum 4 and is knotted for fixation. The other end is connected to the end of the telescopic hose 17 through a metal connector. The connector is riveted or crimped to ensure connection strength. The cover plate 5 is a plate-shaped component parallel to the support plate 6. The material is the same as the support plate 6. It is connected to the support plate 6 by multiple screws or clips. The cover plate is located on one side of the support plate. The coil spring is located between the cover plate and the support plate to cover the coil spring 15.

[0022] The hook grooves 9 and 14 in this technical solution can also be groove-like structures formed on the outer periphery of the drum, with shapes that can be U-shaped, V-shaped, or rectangular, used to accommodate the hooks 16 at the ends of the coil spring 15. The hooks 16 are extensions of both ends of the coil spring 15, manufactured by integral molding or welding with the coil spring 15, and their shapes match the hook grooves 9 and 14 to ensure reliable connection. Specifically, several hook grooves 9 and 14 are evenly distributed on the outer periphery of the extraction drum 4 and the return drum 13, with a groove depth of 2-3 mm and a groove width matching the thickness of the hook 16 (e.g., if the hook 16 thickness is 1.5 mm, the groove width is set to 1.8 mm). The hooks 16 at both ends of the coil spring 15 are L-shaped structures, with one end hooking into the hook groove 14 of the return drum 13 and the other end hooking into the hook groove 9 of the extraction drum 4. A 0.5 mm gap is left between the hook 16 and the bottom of the groove, allowing the hook 16 to slide slightly within the groove to accommodate the stretching and contraction of the coil spring 15. During installation, hook 16 at one end of coil spring 15 is inserted into hook groove 14 of reset drum 13. Reset drum 13 is rotated to pre-tighten coil spring 15. Then, hook 16 at the other end is inserted into hook groove 9 of pull-out drum 4. During operation, as pull-out drum 4 rotates, hook 16 slides within hook grooves 9 and 14, stretching coil spring 15 to store energy. During reset, hook 16 rotates in the opposite direction with the drum, and coil spring 15 contracts to release energy. The distribution angle of hook grooves 9 and 14 is determined based on the maximum extension stroke of coil spring 15, ensuring that hook 16 remains within the groove when coil spring 15 is at its limit position.

[0023] The working process of the pull-out faucet structure provided in this technical solution is as follows: When the user pulls out the water shower head 19, the telescopic hose 17 drives the pull rope 2 to move. The pull rope 2 pulls the pull-out drum 4 to rotate clockwise. At this time, the coil spring 15 is gradually stretched and transferred from the return drum 13 to the pull-out drum 4, accumulating elastic potential energy. The return drum 13 rotates in the same direction due to the tension of the coil spring 15, but at a slightly slower speed, forming a tension difference. After releasing the water shower head 19, the coil spring 15 contracts and releases potential energy, driving the return drum 13 to rotate in the opposite direction. The tension of the coil spring 15 drives the pull-out drum 4 to rotate counterclockwise to retract the pull rope 2. The pull rope 2 then uniformly returns the telescopic hose 17 to its initial position. Throughout the process, the coaxial design of the pull-out drum 4 and the return drum 13 ensures the stability of force transmission.

[0024] This technical solution offers at least the following benefits: The pull-out structure of the faucet utilizes the elastic reset mechanism of the coil spring 15, replacing the radial friction of the traditional helical spring, eliminating direct contact between the spring and the pipe wall, and reducing frictional noise and wear. The linear elasticity of the coil spring 15 ensures a uniform and stable reset force, resulting in a smooth and effortless pull-out experience. The rotating connection between the support plate 6 and the drum reduces mechanical friction and noise. The overall structure is compact, occupying less space than traditional reset mechanisms, making it suitable for installation in confined spaces under the counter. Furthermore, the detachable connection design of the coil spring 15 facilitates future maintenance and replacement, enhancing the product's practicality and reliability. The engagement of the hook 16 with the hook slots 9 and 14 enables quick assembly and disassembly of the coil spring 15 and the drum, allowing for installation and adjustment without the need for specialized tools.

[0025] In another technical solution, such as Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 As shown, in the pull-out structure of the faucet, the outer wall of the pull-out drum 4 is provided with a storage groove 23, and the pull-out rope 2 is located in the storage groove 23.

[0026] In this technical solution, the pull-out drum 4 is a cylindrical tube with an annular groove (receiving groove 23) machined on its outer surface. The cross-sectional shape of the receiving groove 23 can be rectangular, semi-circular, or V-shaped, used to define the winding path of the pull-out rope 2. The depth and width of the receiving groove 23 are determined according to the diameter and number of pull-out ropes 2 to ensure that the pull-out rope 2 can be stably embedded in the groove and avoid axial slippage. The starting end of the pull-out rope 2 is fixed to the bottom of the receiving groove 23 by screws, and part of it is spirally wound along the inner wall of the groove, with a winding length not less than the pull-out length of the telescopic hose 17.

[0027] Specifically, the outer wall of the pull-out drum 4 is machined with an annular storage groove 23, 3-5 mm deep and 1-2 mm wider than the diameter of the pull rope 2. Taking a 2 mm diameter steel wire rope as an example, the storage groove 23 is designed to be 4 mm wide and 3 mm deep, with rounded corners at the bottom to reduce stress concentration. The pull rope 2 is evenly wound along the axial direction of the storage groove 23, with a 0.5-1 mm gap between adjacent loops to facilitate smooth pulling.

[0028] During the pulling process, the pull rope 2 rotates and winds orderly within the storage groove 23 as the pull-out drum 4 rotates. The groove wall of the storage groove 23 restricts the lateral displacement of the rope, preventing it from stacking or slipping. Upon resetting, the coil spring 15 drives the pull-out drum 4 to reverse, and the pull rope 2 is smoothly released from the storage groove 23, ensuring that the rope always moves along a fixed trajectory.

[0029] The storage groove 23 precisely controls the winding path of the pull rope 2 through geometric constraints, preventing tangling or detachment and improving the stability and reliability of the reset action. The circular trajectory of the storage groove 23 guides the pull rope 2 to be neatly arranged, reducing frictional loss between the ropes and ensuring that the pull-out drum 4 is subjected to uniform force, avoiding uneven force due to off-center loading.

[0030] In another technical solution, such as Figure 1 , Figure 2 , Figure 6 As shown, in the pull-out structure of the faucet, a guide wheel 3 coaxial with the pull-out drum 4 is rotatably arranged on the other side of the support plate 6. The distance between the outer circumferential surface of the guide wheel 3 and the edge of the groove of the storage groove 23 is less than the diameter of the pull rope 2, and the axial width of the guide wheel 3 is not less than the width of the storage groove 23.

[0031] In this technical solution, the guide wheel 3 can be a disc made of self-lubricating materials such as nylon or polyoxymethylene. Its outer diameter is determined according to the stroke and spatial dimensions of the pull rope 2. Its surface is smooth and its hardness is lower than that of the pull rope 2 to avoid wear on the rope. The gap between the guide wheel 3 and the storage groove 23 needs to be precisely controlled to ensure that it can guide the rope without hindering its movement.

[0032] Specifically, a short shaft is fixed to the other side of the support plate 6 by welding or screws as a guide wheel shaft. The short shaft is perpendicular to the support plate 6. The guide wheel 3 is rotatably sleeved on the short shaft, and its axial movement is restricted by an elastic retaining ring or a limiting plate. The distance between the outer circumferential surface of the guide wheel 3 and the top surface of the storage groove 23 is set to 0.85 times the diameter of the pull rope 2. The width of the guide wheel 3 matches the width of the storage groove 23 to ensure that the pull rope 2 can smoothly transition to the surface of the guide wheel 3 after being led out from the storage groove 23.

[0033] During operation, the pull rope 2 extends from the storage slot 23 and moves along the outer circumference of the guide wheel 3. The guide wheel 3 rotates freely with the rope, converting sliding friction into rolling friction. The gap design ensures that the rope remains in close contact with the surface of the guide wheel 3, preventing rope vibration or derailment due to excessive gap. The rotation axis of the guide wheel 3 is parallel to the axis of the pull-out drum 4, ensuring a straight and stable movement path for the pull rope 2.

[0034] The introduction of guide wheel 3 significantly reduces the motion resistance of the pull rope 2, making the pull-out operation more effortless, while also reducing wear between the rope and the support plate 6. Precisely controlled clearance and guiding structure effectively prevent the pull rope 2 from slipping out, improving system reliability. The self-lubricating guide wheel 3 requires no additional lubrication maintenance, reducing operating costs. This design solves the guiding problem of the pull rope 2 through a simple mechanical structure, making it suitable for faucet products with various pull-out strokes.

[0035] In another technical solution, such as Figure 1 , Figure 2 , Figure 6 As shown, in the pull-out structure of the faucet, a guide wheel shaft coaxial with the first support hole 7 is provided on the other side of the support plate 6. A limiting plate perpendicular to the guide wheel shaft is provided at the free end of the guide wheel shaft. The guide wheel 3 is rotatably sleeved on the guide wheel shaft and located between the support plate 6 and the limiting plate.

[0036] In this technical solution, the guide wheel shaft is a shaft-like component that supports the rotation of the guide wheel 3. It can be made of metal or plastic, and its length is determined according to the installation space of the guide wheel 3. The limiting plate is a plate-like structure that is vertically fixed to the end of the guide wheel shaft. It can be made of metal or plastic, depending on the material of the guide wheel shaft, and is used to limit the axial movement of the guide wheel 3.

[0037] One end of the guide wheel shaft is welded and fixed to the support plate 6 or integrally formed with the support plate 6, while the other end is welded and integrally formed with a limiting plate. The limiting plate can also be installed on the end of the guide wheel shaft with screws. The guide wheel 3 can be a structure similar to a sliding bearing, rotatably sleeved on the guide wheel shaft. The limiting plate prevents the guide wheel from moving axially and ensures the relative position of the guide wheel 3 and the receiving groove 23 is stable.

[0038] In another technical solution, such as Figure 1 , Figure 2 , Figure 6 As shown, in the pull-out structure of the faucet, a guide wheel shaft coaxial with the first support hole 7 is provided on the other side of the support plate 6. The guide wheel 3 includes an inner sleeve and an outer sleeve. The outer sleeve is coaxially rotatably sleeved outside the inner sleeve (similar to a rolling bearing). The inner sleeve is fixedly sleeved on the guide wheel shaft.

[0039] In this technical solution, the guide wheel shaft can be a screw, installed on the support plate 6 through a threaded hole. The inner and outer sleeves form a split guide wheel 3. The inner sleeve is fixed to the guide wheel shaft via a key connection or set screw, while the outer sleeve is rotatably connected to the inner sleeve via ball bearings or needle rollers, forming a rolling bearing structure. The outer surface of the outer sleeve is the working surface of the guide wheel 3. The split guide wheel 3 further reduces resistance through rolling friction, making it suitable for high-frequency pulling operations. If the guide wheel shaft is a screw, it can be directly screwed into the threaded hole of the support plate 6 without additional shaft hole machining, simplifying the installation process. Furthermore, the detachable connection design between the guide wheel shaft and the support plate 6 facilitates later maintenance and replacement, enhancing the product's adaptability and reliability.

[0040] In another technical solution, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, in the pull-out structure of the faucet, both the pull-out roller 4 and the reset roller 13 are provided with limiting grooves 8 and 12 around their outer peripheries, and the coil spring 15 is located between the two side walls of the limiting grooves 8 and 12.

[0041] In this technical solution, the limiting grooves 8 and 12 are annular grooves opened on the outer periphery of the drum. Their width is greater than the width of the coil spring 15, and their depth is slightly greater than the radius of the coil spring 15. They are used to limit the radial position of the coil spring 15 and prevent the coil spring 15 from deviating or jumping out when the drum rotates.

[0042] Specifically, both the extraction drum 4 and the return drum 13 have annular limiting grooves 8 and 12 with a depth of 1.5-2 mm and a width of 4-5 mm machined on their outer circumferences. The two side walls of the grooves are perpendicular to the axis of the drum. The coil spring 15 has a width of 1-1.2 mm and is embedded in the limiting grooves 8 and 12 after being coiled. A gap of 0.2-0.3 mm is left between the two side walls and the groove walls, which allows the coil spring 15 to swing slightly while limiting its radial movement range.

[0043] As the coil spring 15 rotates with the drum, the sidewalls of the limiting grooves 8 and 12 prevent the axial displacement of the coil spring 15, keeping it always within the groove. The clearance design avoids excessive friction between the coil spring 15 and the groove wall, while allowing the coil spring 15 to make small adjustments to its position within the groove to adapt to stress changes during rotation.

[0044] The setting of limiting grooves 8 and 12 effectively solves the problem of radial displacement of coil spring 15 during operation, ensuring that it always works normally around the drum axis. The annular structure of limiting grooves 8 and 12 makes the coil spring 15 evenly stressed, avoiding the twisting or breakage of coil spring 15 due to uneven load, and improving the stability and reliability of the reset mechanism.

[0045] In another technical solution, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, in the pull-out structure of the faucet, the cover plate 5 is provided with a second support hole 11 corresponding to the first support hole 7, and the pull-out roller 4 is also rotatably inserted into the second support hole 11; a first support shaft 22 coaxial with the first support hole 7 is provided on one side of the support plate 6, and a second support shaft 10 corresponding to and coaxial with the first support shaft 22 is provided on the side of the cover plate 5 opposite to the support plate 6, and the reset roller 13 is rotatably sleeved on the outer periphery of both the first support shaft 22 and the second support shaft 10; the limiting grooves 8 and 12 are both located between the cover plate 5 and the support plate 6.

[0046] In this technical solution, the cover plate 5 is a plate-shaped component parallel to the support plate 6, made of the same material as the support plate 6, and connected to the support plate 6 by screws or clips. It is used to cover the reset drum 13 and the coil spring 15, forming a protective barrier. The first support shaft 22 and the second support shaft 10 are shaft-shaped structures fixed to the support plate 6 and the cover plate 5 and are coaxial. They are used to install the reset drum 13 and ensure its coaxial rotation.

[0047] Specifically, the support plate 6 and the cover plate 5 are connected by four evenly distributed screws. A second support hole 11, coaxial with the first support hole 7 of the support plate 6, is formed on the cover plate 5. The pull-out drum 4 passes through both the first support hole 7 and the second support hole 11 simultaneously via bearings. A first support shaft 22 is fixed to one side of the support plate 6, and a second support shaft 10 is fixed to the corresponding side of the cover plate 5. The reset drum 13 is sleeved around the first support shaft 22 and the second support shaft 10, and is rotatably connected via bearings. Limiting grooves 8 and 12 are located within the space between the support plate 6 and the cover plate 5, and the coil spring 15 is completely enclosed within this space.

[0048] During assembly, first connect the coil spring 15 to the reset coil 13 and the pull-out coil 4. Then, simultaneously, slip the reset coil 13 onto the first support shaft 22 of the support plate 6, insert the pull-out coil 4 into the first support hole 7, and then cover it with the cover plate 5. At this time, the second support shaft 10 on the cover plate 5 is inserted into the other end of the reset coil 13, forming a bidirectional rigid support. The pull-out coil 4 is also inserted into the second support hole 11. Finally, fix the cover plate 5 with screws. The bearings between the support shaft and the reset coil 13 are selected as deep groove ball bearings or oil-impregnated bearings to reduce rotational resistance.

[0049] The dual-support shaft design provides stable support for the reset drum 13, and the dual-support hole design provides stable support for the extraction drum 4, reducing radial runout during rotation, preventing the reset drum 13 and extraction axis from shifting, ensuring rotational stability, and ensuring that the coil spring 15 is subjected to uniform force. The removable cover plate 5 facilitates maintenance personnel to disassemble and inspect internal parts and replace worn components.

[0050] In another technical solution, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, in the pull-out structure of the faucet, the edge of the support plate 6 extends to one side to form a barrier. This barrier abuts against the cover plate 5, and its width is greater than the width of the limiting grooves 8 and 12. The barrier protects the structure between the cover plate 5 and the support plate 6. The design of the barrier's width being greater than the limiting grooves 8 and 12 ensures that the cover plate 5 covers the limiting grooves 8 and 12, preventing the coil spring 15 from accidentally dislodging. The barrier enhances the rigidity of the edge of the support plate 6, reduces local deformation when installing screws, and makes the connection more stable.

[0051] In another technical solution, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, in the pull-out structure of the faucet, a connecting sleeve 1 is provided on the top of the other side of the support plate 6. The connecting sleeve 1 is coaxial with and detachably connected to the connecting pipe 21 at the inlet end of the faucet body 20.

[0052] In this technical solution, the connecting sleeve 1 is a tubular connecting structure set on the top of the support plate 6. Its outer diameter matches the inner diameter of the connecting pipe 21 of the faucet body 20. It can be detached by means of threads, bayonet, or interference fit to ensure convenient installation and reliable sealing. The pull rope 2 passes through the connecting sleeve 1 and the connecting pipe 21 and extends into the faucet body 20 to connect with the telescopic hose 17.

[0053] Specifically, the connecting sleeve 1 is a cylindrical metal pipe, with one end welded or injection molded to the top of the support plate 6, and the other end processed according to the connection method: for threaded connection, external threads are machined on the outer wall; for bayonet connection, a flange is provided on the outer wall; for plug connection, the outer wall is a smooth cylindrical surface and is provided with an external sealing ring. The end of the connecting pipe 21 of the faucet body 20 is provided with an internal thread, an annular groove or a sealing ring mounting groove to ensure a tight fit with the connecting sleeve 1.

[0054] Taking threaded connections as an example, during installation, align the external thread of the connecting sleeve 1 with the internal thread of the connecting pipe 21, and rotate clockwise until tightened. Sealant can be applied to the mating surfaces to enhance sealing. For bayonet connections, simply insert the connecting sleeve 1 into the connecting pipe 21 and rotate it at a certain angle to engage the flange in the slot. Plug-in connections achieve quick installation through interference fit and sealing rings, suitable for scenarios requiring frequent disassembly.

[0055] The versatile detachable connection methods allow the pull-out structure to adapt to different brands and models of faucet bodies 20, improving product versatility and facilitating disassembly and maintenance. Threaded connections provide reliable mechanical strength and sealing, suitable for long-term fixed installation; bayonet and plug-in connections facilitate quick disassembly and assembly, meeting maintenance or replacement needs. The tubular structure of the connecting sleeve 1 ensures coaxial force transmission, avoiding uneven stress on the support plate 6 caused by eccentric connections, and improving the overall structural stability.

[0056] like Figure 3 As shown, this utility model provides a pull-out faucet, which includes the pull-out structure of the faucet in any of the above technical solutions. The telescopic hose 17 is movably inserted into the faucet body 20, and the water spray head 19 is located at the outlet end of the faucet body.

[0057] In this technical solution, the pull-out faucet refers to a faucet product with a pull-out water spray head 19. The faucet body 20 has a channel inside to accommodate the telescopic hose 17. The position of the water spray head 19 can be adjusted through the pull-out structure, which has both fixed water output and flexible rinsing functions.

[0058] Specifically, the faucet body 20 has a hollow cylindrical structure with an axially continuous hose channel inside, the diameter of which is slightly larger than the outer diameter of the telescopic hose 17. The telescopic hose 17 is made of rubber or PVC, with a water pipe inside and a fiber reinforcement layer on the outside to improve tensile strength. The water shower head 19 is fixed to the outlet end of the telescopic hose 17 by threads or clips. The support plate 6 of the pull-out structure is connected to the bottom of the faucet body 20 through the connecting sleeve 1. The pull rope 2 passes through the hose channel inside the faucet body 20, with one end connected to the pull-out reel 4 and the other end fixed to the middle of the telescopic hose 17 through a metal connector. The water outlet at the top of the faucet body 20 is equipped with a guide ring to guide the telescopic hose 17 in and out, avoiding friction damage.

[0059] When the user pulls out the shower head 19, the telescopic hose 17 slides within the hose channel, and the pull rope 2 drives the pull-out drum 4 to rotate, storing energy in the coil spring 15. Upon release, the coil spring 15 drives the pull-out drum 4 to retract the pull rope 2, and the telescopic hose 17 retracts into the faucet body 20 under the pulling force. Throughout the process, the inner wall of the hose channel remains smooth, reducing the movement resistance of the telescopic hose 17, and the guide ring ensures the linear movement of the telescopic hose 17, preventing tangling.

[0060] This technical solution integrates the pull-out structure with the faucet body 20, enabling flexible pull-out and automatic reset of the showerhead 19 to meet users' needs for different rinsing positions. The telescopic hose 17 fits tightly with the main body channel, ensuring smooth movement without noticeable wobbling. The compact layout of the pull-out structure does not occupy extra space and is suitable for installation above various kitchen or bathroom sinks. The overall structure is easy to operate, highly reliable, and enhances the user experience. The highly integrated design simplifies pipe layout, adapts to the compact environment of modern kitchens and bathrooms, and improves aesthetics and practicality.

[0061] The faucet body has no built-in coil spring, eliminating the significant friction and sharp friction noise generated by the contact between the coil spring and the inner wall of the faucet body's curved pipe. This greatly improves the comfort of using the product, reduces friction and wear, and enhances the product's durability.

[0062] In another technical solution, such as Figure 3 As shown, in the pull-out faucet, the faucet body 20 has an inner tube 18 inside, the inlet end of the inner tube 18 is connected to the water supply pipe, the inner tube 18 is sealed and movable with the telescopic hose 17, and the outlet end of the telescopic hose 17 is connected to the water shower head 19.

[0063] In this technical solution, the inner tube 18 is a water supply pipe fixed inside the faucet body 20, made of copper or stainless steel, used to transport water. The telescopic flexible hose 17 is a movable pipe that is sleeved outside the inner tube 18, made of rubber or silicone, with a smooth inner wall to reduce water flow resistance and a wear-resistant layer on the outer wall.

[0064] Specifically, the inner tube 18 is vertically fixed to the center of the faucet body 20. The inlet is connected to the hot and cold water supply pipes via threads. The outer wall of the inner tube 18 has two annular sealing grooves in the middle, with fluororubber O-rings embedded in the grooves. The telescopic hose 17 is sleeved on the outer side of the inner tube 18. The inner wall of the telescopic hose 17 is tightly attached to the O-rings to form an axial sliding seal. The outlet end of the telescopic hose 17 is connected to the water shower head 19, and a leak-proof rubber gasket is provided at the connection.

[0065] Water flows from the water supply pipe into the inner pipe 18, and then through the outlet of the inner pipe 18 into the telescopic hose 17. When the shower head 19 is pulled out, the telescopic hose 17 slides along the outer wall of the inner pipe 18, and the O-ring seal deforms slightly but remains sealed to prevent water leakage. When resetting, the telescopic hose 17 retracts under the pull of the pull rope 2, and the O-ring seal returns to its original shape, maintaining good sealing performance at all times.

[0066] The sealing structure between the inner tube 18 and the telescopic hose 17 ensures the stability and sealing of the water flow path, avoiding leakage problems caused by hose movement in traditional pull-out faucets. The elastic compensation of the O-ring seal accommodates the axial movement of the telescopic hose 17 while reducing frictional resistance. The fixed design of the inner tube 18 provides reliable guidance for the telescopic hose 17, preventing it from twisting or shifting during the pull-out process. This structure is simple, efficient, and low-cost, suitable for the water flow transmission needs of various pull-out faucets.

[0067] The number of devices and processing scale described herein are for the purpose of simplifying the description of this utility model. Applications, modifications, and variations of this utility model will be readily apparent to those skilled in the art.

[0068] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A pull-out structure for a faucet, characterized in that, The system includes a support plate (6), a pull-out drum (4), a return drum (13), a coil spring (15), a pull rope (2), and a cover plate (5). The support plate (6) has a first support hole (7). The pull-out drum (4) is coaxial with the first support hole (7) and rotatably inserted into it. The return drum (13) is offset from and parallel to the axis of the pull-out drum (4) and rotatably disposed on one side of the support plate (6). Hook grooves (9, 14) are provided on the drum wall of the pull-out drum (4) on one side of the support plate (6) and on the drum wall of the return drum (13). Hooks (16) are provided at both ends of the coil spring (15). The coil spring (15) is coiled on the support plate (6). The hook (16) at one end of the reset drum (13) is hooked to the hook groove (14) on the reset drum (13), and the hook (16) at the other end of the coil spring (15) is hooked to the hook groove (9) on the pull-out drum (4). One end of the pull rope (2) is connected to the wall of the pull-out drum (4) located on the other side of the support plate (6) and partially coiled around the outer periphery of the pull-out drum (4). The other end of the pull rope (2) is connected to the telescopic hose (17) connected to the water shower head (19). The cover plate (5) is located on one side of the support plate (6) and is connected to the support plate (6) by multiple screws. The coil spring (15) is located between the cover plate (5) and the support plate (6).

2. The pull-out structure of the faucet as described in claim 1, characterized in that, The outer wall of the pull-out drum (4) is provided with a storage groove (23), and the pull rope (2) is located in the storage groove (23).

3. The pull-out structure of the faucet as described in claim 2, characterized in that, On the other side of the support plate (6), a guide wheel (3) is rotatably provided, which is coaxial with the pull-out drum (4). The distance between the outer circumferential surface of the guide wheel (3) and the edge of the groove of the storage groove (23) is less than the diameter of the pull rope (2). The axial width of the guide wheel (3) is not less than the width of the storage groove (23).

4. The pull-out structure of the faucet as described in claim 3, characterized in that, On the other side of the support plate (6), there is a guide wheel shaft coaxial with the first support hole (7). The free end of the guide wheel shaft is provided with a limiting plate perpendicular to it. The guide wheel (3) is rotatably sleeved on the guide wheel shaft and located between the support plate (6) and the limiting plate.

5. The pull-out structure of the faucet as described in claim 1, characterized in that, The outer periphery of both the pull-out drum (4) and the reset drum (13) is provided with limiting grooves (8, 12), and the coil spring (15) is located between the two side walls of the limiting grooves (8, 12).

6. The pull-out structure of the faucet as described in claim 5, characterized in that, The cover plate (5) is provided with a second support hole (11) corresponding to the first support hole (7), and the pull-out drum (4) is also rotatably inserted into the second support hole (11); a first support shaft (22) coaxial with the first support hole (7) is provided on one side of the support plate (6), and a second support shaft (10) corresponding to and coaxial with the first support shaft (22) is provided on the side of the cover plate (5) opposite to the support plate (6), and the reset drum (13) is rotatably sleeved on the outer periphery of both the first support shaft (22) and the second support shaft (10); the limiting grooves (8, 12) are both located between the cover plate (5) and the support plate (6).

7. The pull-out structure of the faucet as described in claim 6, characterized in that, The edge of the support plate (6) extends to one side to form a barrier, which abuts against the cover plate (5) and the width of the barrier is greater than the width of the limiting groove (8,12).

8. The pull-out structure of the faucet as described in claim 1, characterized in that, A connecting sleeve (1) is provided on the top of the other side of the support plate (6). The connecting sleeve (1) is coaxial with and detachably connected to the connecting pipe (21) at the inlet end of the faucet body (20).

9. A pull-out faucet, characterized in that, The faucet includes a pull-out structure as described in any one of claims 1 to 8, wherein the telescopic hose (17) is movably inserted into the faucet body (20), and the water spray head (19) is located at the outlet end of the faucet body.

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