A pull-out sensor structure for a pull-out faucet

Abstract

A pull-out sensing structure for a pull-out faucet includes a faucet body, a pull-out tube assembly, a magnet, a Hall sensor, and a solenoid valve. The faucet body has an installation channel, the pull-out tube assembly is movably inserted through the installation channel, the magnet is disposed on the pull-out tube assembly, and the Hall sensor is fixed to the inner wall of the installation channel and spaced relative to the magnet, and is electrically connected to the solenoid valve. When the pull-out tube assembly is pulled out or reset, the relative distance between the magnet and the Hall sensor changes, causing the Hall sensor to output a signal to control the solenoid valve to open or close the water circuit. Because the Hall sensor and magnet are used in conjunction to replace the traditional infrared sensor, false triggering or malfunction caused by environmental factors is avoided, and the sensing stability is improved. At the same time, the pull-out action is directly linked to the water circuit control, achieving "water comes out when pulled out and water turns off when reset" without additional operation, simplifying operation and enhancing functional integration.

Description

Technical Field

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

[0002] Pull-out faucets are widely used in kitchens and bathrooms due to their flexible water flow angles and wide cleaning range. To improve convenience and hygiene, pull-out sensor faucets with sensor control are gradually becoming the mainstream in the market. They achieve automatic water flow control through the cooperation of sensors and solenoid valves, reducing the contamination problem caused by hand contact.

[0003] In the prior art, for example, the Chinese utility model patent application number 202222169958.6 (authorization announcement number CN218118769U) discloses "A Pull-out Sensor Faucet", which optimizes the structural compactness of the faucet body and reduces the size and material cost of the branch pipe by installing an integrated valve seat and a solenoid valve in the main pipe of the faucet body and locking them with screws along the connection of the branch pipe. At the same time, the water circuit is turned on and off by controlling the solenoid valve with a sensor. It has the advantages of convenient operation and reasonable structural design.

[0004] However, existing pull-out sensor faucets mostly rely on infrared sensors for control. The hand must be moved to the sensing position for the faucet to register the movement, but during the pull-out operation, the hand is usually not at the sensor's position, requiring the other hand to be held in that position, making operation very inconvenient. Furthermore, the sensing effect is easily affected by ambient light and obstructions, potentially leading to false triggers or sensor malfunctions. Additionally, the pull-out action is merely a mechanical adjustment of the water outlet position, lacking integration with water circuit control, resulting in a relatively limited function. While some products have attempted to use mechanical switches for auxiliary control, these still suffer from cumbersome operation and poor coordination with the pull-out action.

[0005] Therefore, how to achieve precise control of the water path by utilizing the pull-out action itself, and how to replace traditional infrared sensing with a stable and reliable sensing method to improve the stability and functional integration of pull-out faucets, has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a pull-out sensing structure for a pull-out faucet with a more reasonable sensing method, in view of the above-mentioned technical status.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problem is: a pull-out sensing structure for a pull-out faucet, comprising...

[0008] The main body of the faucet is equipped with an installation channel;

[0009] A pull-out tube assembly is movably inserted through the mounting channel and can move axially along the mounting channel;

[0010] A magnet is fixed to the pull-out tube assembly and moves synchronously with the pull-out tube assembly.

[0011] A Hall sensor is fixed to the inner wall of the mounting channel;

[0012] The solenoid valve is electrically connected to the Hall sensor, and its outlet end is connected to one end of the pull-out pipe assembly.

[0013] When the pull-out tube assembly is in the pulled-out state, the magnet is away from the Hall sensor, the Hall sensor outputs an opening signal, and the solenoid valve opens the water passage.

[0014] When the pull-out tube assembly is in the reset state, the magnet is close to the Hall sensor, the Hall sensor outputs a shut-off signal, and the solenoid valve cuts off the water path.

[0015] To optimize the structure of the pull-out tube assembly, form a continuous water path, and rationally position the magnet, preferably, the pull-out tube assembly includes a first pull-out tube, a second pull-out tube, and a hose connector. The first pull-out tube and the second pull-out tube are respectively connected to the two ends of the hose connector to form a continuous water path. The end of the second pull-out tube away from the hose connector is connected to the water outlet of the solenoid valve, and the end of the first pull-out tube away from the hose connector is the water outlet. The magnet is disposed on the hose connector and located between the first pull-out tube and the second pull-out tube.

[0016] To further optimize the structure of the hose connector, achieve a stable connection with the pull-out tube, and effectively position the magnet, preferably, the hose connector includes a first connecting part, a second connecting part, and an annular boss. The first connecting part and the second connecting part are respectively connected to the first pull-out tube and the second pull-out tube. The annular boss protrudes between the first connecting part and the second connecting part. The magnet is annular and is sleeved on the outer periphery of the first connecting part and abuts against the annular boss and the water inlet end of the first pull-out tube.

[0017] To guide and limit the movement of the pull-out tube assembly and ensure the precise relative positioning of the magnet and the Hall sensor during pull-out reset, preferably, a valve seat is fixed in the mounting channel of the faucet body, and the valve seat has an movable groove for the pull-out tube assembly to move; when the pull-out tube assembly resets to a preset position along the length direction of the movable groove, the magnet and the Hall sensor are adjacent to each other and positioned relative to each other.

[0018] To ensure the stable fixation of the Hall sensor and the effective sensing between the sensing end and the magnet during the pulling process, preferably, the Hall sensor is fixed to the faucet body by a mounting bracket, and the mounting bracket is connected and fixed to the faucet body or valve seat; the sensing end of the Hall sensor and the magnet maintain a preset interval distance when the pull tube assembly is in the reset state, and are always on the corresponding sensing path during the pulling process.

[0019] In order to achieve control and regulation of water flow and form a complete water circuit control process, preferably, the faucet body is also provided with a valve core, and the valve seat is provided with a mixing inlet hole and a mixing outlet hole that connect to the valve core. Water flows into the internal flow channel of the valve core through the mixing outlet hole of the valve seat, and after being controlled by the valve core, it enters the valve seat through the mixing inlet hole of the valve seat, and then flows to the inlet end of the pull-out tube assembly through the solenoid valve.

[0020] To optimize the connection structure between the valve core and the valve seat and ensure accurate water flow, preferably, the valve core is horizontally mounted on the faucet body, and the side of the valve seat is provided with a mating surface that communicates and connects with the valve core. The mixing inlet and mixing outlet are located on the mating surface, and the inlet and outlet channels of the valve core are correspondingly connected to the mixing inlet and mixing outlet on the mating surface.

[0021] To achieve effective connection between the valve seat, the external water inlet pipe, and the solenoid valve, forming a complete water transmission path, preferably, the bottom of the valve seat is provided with an outlet and an inlet. The outlet is connected to the inlet end of the solenoid valve, and the inlet is used to connect to the external water inlet pipe. The mixing inlet hole and mixing outlet hole on the mating surface of the valve seat are connected to the inlet and outlet hole at the bottom through the water passage inside the valve seat, so as to form a complete water transmission path from the external water inlet pipe through the inlet hole, the mixing inlet hole, the valve core, the mixing outlet hole, and the outlet to the solenoid valve.

[0022] Compared with existing technologies, the advantages of this invention are as follows: A novel sensing method is used, specifically by setting a magnet on the pull-out tube assembly and a Hall sensor spaced relative to the magnet on the inner wall of the installation channel of the faucet body. The Hall sensor is electrically connected to a solenoid valve that controls the water flow. The change in the relative distance between the magnet and the Hall sensor during the pull-out or reset state of the tube assembly triggers a switching of the magnetic field strength threshold, enabling the solenoid valve to automatically control the water flow. Because the Hall sensor and magnet work together instead of traditional infrared sensing, the need for the hand to be moved to the sensing position is avoided, as are false triggering or sensing failures caused by ambient light or obstructions, thus improving sensing stability. Furthermore, the pull-out action is directly linked to water flow control, achieving "water comes out when pulled out, water turns off when reset" without additional operation. This simplifies the operation process, enhances functional integration, and solves the problem that traditional pull-out faucets only perform mechanical adjustments and have poor coordination with water flow control. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of this embodiment;

[0024] Figure 2 This is a schematic diagram of the decomposed state structure of this embodiment;

[0025] Figure 3 This is a cross-sectional view of the structure in this embodiment (the pull-out tube assembly is in the reset state).

[0026] Figure 4 This is a cross-sectional view of the structure in this embodiment (the pull-out tube assembly is in the pull-out state);

[0027] Figure 5 This is a three-dimensional structural diagram of the pull-out tube assembly in this embodiment;

[0028] Figure 6 This is a three-dimensional structural schematic diagram of the valve seat in this embodiment;

[0029] Figure 7 This is a three-dimensional structural diagram of the valve seat from another angle in this embodiment;

[0030] Figure 8 This is a three-dimensional structural diagram of the hose connector in this embodiment;

[0031] Figure 9 This is a schematic diagram of the internal structure of the solenoid valve 5 in this embodiment (the arrows indicate the direction of water flow). Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0033] Figures 1-9 The figure shown is the preferred embodiment of this utility model.

[0034] The pull-out sensing structure for the pull-out faucet in this embodiment mainly includes the faucet body 1, pull-out tube assembly 2, magnet 3, Hall sensor 4, solenoid valve 5, valve seat 6, mounting bracket 7, valve seat 6, valve core 8, etc. It aims to solve the problems of existing pull-out sensing faucets relying on infrared sensing being easily affected by environmental interference and the pull-out action being disconnected from water circuit control. Through the sensing cooperation of Hall sensor and magnet and the linkage design of pull-out action and water circuit control, the effect of stable sensing and convenient operation is achieved.

[0035] The structure and connection relationship of each component in this embodiment are as follows:

[0036] Leading Body 1: Reference Figures 1 to 3 As shown, the main body 1 of the faucet is a hollow tubular structure, which can be cast from brass. The interior is provided with an installation channel 1a along the axial direction for the pull-out tube assembly 2 to pass through. A valve seat 6 is fixed in the installation channel 1a, and the side wall is provided with a cavity for the valve core 8 to be installed laterally.

[0037] Pull-out tube assembly 2: Reference Figures 2 to 5 , Figure 8 As shown, the pull-out tube assembly 2 can be freely pulled out and adjusted in position along the axial direction of the installation channel 1a. The pull-out tube assembly 2 includes a first pull-out tube 2a, a second pull-out tube 2b, and a hose connector 2c. The first pull-out tube 2a is a flexible corrugated metal tube, with its end away from the hose connector 2c being the water outlet. The second pull-out tube 2b is connected to the water outlet of the solenoid valve 5. The hose connector 2c includes a first connecting part 2c1, a second connecting part 2c2, and an annular boss 2c3. The first connecting part 2c1 connects to the first pull-out tube 2a, and the second connecting part 2c2 connects to the second pull-out tube 2b. The annular boss 2c3 protrudes between the first connecting part 2c1 and the second connecting part 2c2, and by cooperating with the water inlet of the first pull-out tube 2a, it limits the magnet 3, which is sleeved on the outer periphery of the first connecting part 2c1, between the water inlet of the first pull-out tube 2a and the annular boss 2c3, thereby forming an upper and lower axial limit.

[0038] Magnet 3: Reference Figures 2 to 5 As shown, the magnet 3 is ring-shaped and fixed on the hose connector 2c of the pull-out tube assembly 2 and located between the first pull-out tube 2a and the second pull-out tube 2b; specifically, it is sleeved on the outer periphery of the first connecting part 2c1 of the hose connector 2c and abuts against the annular boss 2c3 of the hose connector 2c and the water inlet end of the first pull-out tube 2a, and moves synchronously with the pull-out tube assembly 2.

[0039] Hall sensor 4: Reference Figures 2-4As shown, the Hall sensor 4 is fixed to the inner wall of the mounting channel 1a of the faucet body 1 by the mounting bracket 7; the sensing end of the Hall sensor 4 faces the magnet 3, and maintains a preset distance from the magnet 3 when the pull tube assembly 2 is in the reset state, and is always on the corresponding sensing path during the pull process; the pin of the Hall sensor 4 is electrically connected to the control end of the solenoid valve 5 through the wire, and can output a switch signal according to the change of magnetic field strength.

[0040] Solenoid valve 5: Reference Figure 1 , Figure 2 and Figure 9 As shown, the inlet end of the solenoid valve 5 is connected to the outlet 6e of the valve seat 6, and the outlet end is connected to the end of the second pull tube 2b in the pull tube assembly 2 away from the hose connector 2c; it is equipped with an electromagnetic coil and a rubber valve core, and controls the valve core to open and close after receiving the signal from the Hall sensor 4, so as to realize the opening and closing of the water circuit.

[0041] Valve seat 6: Reference Figure 2 , Figure 6 and Figure 7 As shown, the valve seat 6 is fixed in the installation channel 1a of the faucet body 1, and has a movable groove 6a for the pull-out tube assembly 2 to move. When the pull-out tube assembly 2 is reset to the preset position along the length of the movable groove 6a, the magnet 3 and the Hall sensor 4 are adjacent to each other and arranged opposite each other. The side of the valve seat 6 has a mating surface 6d that communicates with the valve core 8. The mating surface 6d has a mixing inlet hole 6b and a mixing outlet hole 6c. The bottom has an outlet 6e and an inlet 6f. The outlet 6e is connected to the inlet end of the solenoid valve 5, and the inlet 6f is used to connect to the external inlet pipe 6g. The valve seat 6 has a water passage inside, so that the mixing inlet hole 6b and the mixing outlet hole 6c on the mating surface 6d are connected to the inlet 6f and the outlet 6e at the bottom, forming a water flow transmission channel.

[0042] Mounting bracket 7: Reference Figure 2 and Figure 3 As shown, the mounting bracket 7 is fixed to the inner wall of the mounting channel 1a of the faucet body 1 by screws, and a mounting groove is formed on it. The Hall sensor 4 is installed in the mounting groove. The structural positioning of the bracket ensures the stability of the relative position between the Hall sensor 4 and the magnet 3. Of course, the mounting bracket 7 can also be installed on the valve seat 6 to achieve another kind of fixed connection.

[0043] Valve core 8: Reference Figures 1 to 3 The valve core 8 is a ceramic valve core, which is horizontally set on the faucet body 1 and connected to a control handle at the end. Its inlet and outlet channels are connected to the mixing inlet hole 6b and mixing outlet hole 6c on the mating surface 6d of the valve seat 6. It has an internal channel for adjusting the ratio and flow of hot and cold water. The temperature and flow rate of the water can be controlled by rotating the handle.

[0044] The working principle of the pull-out sensing structure for the pull-out faucet in this embodiment is as follows:

[0045] 1. Sensing control logic: When the pull-out tube assembly 2 is pulled outward, it drives the magnet 3 to move synchronously along the installation channel 1a, gradually increasing the distance between the magnet 3 and the Hall sensor 4. When the distance reaches the critical distance (the magnetic field strength is lower than the trigger threshold), the Hall sensor 4 outputs an open signal, the solenoid valve 5 opens the water path, and the pull-out tube assembly 2 starts to discharge water. When the pull-out tube assembly 2 is pushed inward to reset, the magnet 3 moves closer to the Hall sensor 4, and the distance gradually decreases. When the distance reaches the critical distance again and the magnetic field strength is higher than the trigger threshold again, the Hall sensor 4 outputs a close signal, the solenoid valve 5 cuts off the water path, and the pull-out tube assembly 2 stops discharging water.

[0046] 2. Water transmission path: Water from the external inlet pipe 6g enters the valve seat 6 through the inlet 6f of the valve seat 6, and is transported through the internal water passage to the mixing outlet 6c of the mating surface 6d, flowing into the internal flow channel of the valve core 8; after the valve core 8 adjusts the water temperature and flow rate, the water is led out from the valve core 8 to the mixing inlet 6b on the mating surface 6 of the valve seat 6, and is transported through the internal water passage of the valve seat 6 to the outlet 6e at the bottom, entering the inlet end of the solenoid valve 5; when the solenoid valve 5 is turned on, the water flows through the outlet end of the solenoid valve 5 into the second pull tube 2b of the pull tube assembly 2, and then through the hose connector 2c and the first pull tube 2a in sequence, finally flowing out from the outlet end of the first pull tube 2a.

[0047] 3. Coordinated control process: The control handle of the rotary valve core 8 can adjust the opening of the internal flow channel, change the mixing ratio of hot and cold water and the water output. The adjusted water flow is still delivered through the above water transmission path, and finally the solenoid valve 5 realizes the on-off control according to the pull action. The two work together to achieve complete regulation of the water flow.

[0048] It should be noted that in the description of this embodiment, the terms "front," "rear," "left," "right," "up," "down," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are merely for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model. The terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

Claims

1. A pull-out sensing structure for a pull-out faucet, characterized in that: include The main body of the faucet (1) is provided with an installation channel (1a); The pull-out tube assembly (2) is movably inserted through the mounting channel (1a) and can move axially along the mounting channel (1a); A magnet (3) is fixed to the pull-out tube assembly (2) and moves synchronously with the pull-out tube assembly (2); Hall sensor (4) is fixed to the inner wall of the mounting channel (1a); The solenoid valve (5) is electrically connected to the Hall sensor (4), and its outlet end is connected to one end of the pull-out pipe assembly (2); In this case, the pull-out tube assembly (2) is in the pulled-out state, the magnet (3) is away from the Hall sensor (4), the Hall sensor (4) outputs an opening signal, and the solenoid valve (5) opens the water passage; When the pull-out tube assembly (2) is in the reset state, the magnet (3) is close to the Hall sensor (4), the Hall sensor (4) outputs a shut-off signal, and the solenoid valve (5) cuts off the water path.

2. The pull-out sensing structure for a pull-out faucet according to claim 1, characterized in that: The pull-out tube assembly (2) includes a first pull-out tube (2a), a second pull-out tube (2b), and a hose connector (2c). The first pull-out tube (2a) and the second pull-out tube (2b) are respectively connected to the two ends of the hose connector (2c) to form a continuous water channel. The end of the second pull tube (2b) away from the hose connector (2c) is connected to the water outlet of the solenoid valve (5), and the end of the first pull tube (2a) away from the hose connector (2c) is the water outlet. The magnet (3) is disposed on the hose connector (2c) and located between the first pull tube (2a) and the second pull tube (2b).

3. The pull-out sensing structure for a pull-out faucet according to claim 2, characterized in that: The hose connector (2c) includes a first connecting part (2c1), a second connecting part (2c2), and an annular boss (2c3). The first connecting part (2c1) and the second connecting part (2c2) are respectively connected to the first pull tube (2a) and the second pull tube (2b). The annular boss (2c3) protrudes between the first connecting part (2c1) and the second connecting part (2c2). The magnet (3) is ring-shaped and is sleeved on the outer periphery of the first connecting part (2c1) and abuts between the annular boss (2c3) and the water inlet end of the first pull tube (2a).

4. The pull-out sensing structure for a pull-out faucet according to claim 1, characterized in that: A valve seat (6) is fixedly provided in the installation channel (1a) of the main body (1) of the faucet, and a movable groove (6a) for the pull tube assembly (2) to move is provided on the valve seat (6); When the pull-out tube assembly (2) is reset to the preset position along the length direction of the movable groove (6a), the magnet (3) and the Hall sensor (4) are adjacent to each other and arranged opposite each other.

5. The pull-out sensing structure for a pull-out faucet according to claim 1, characterized in that: The Hall sensor (4) is fixed to the faucet body (1) by a mounting bracket (7), and the mounting bracket (7) is connected and fixed to the faucet body (1) or the valve seat (6); The sensing end of the Hall sensor (4) and the magnet (3) maintain a preset distance from each other when the pull tube assembly (2) is in the reset state, and are always on the corresponding sensing path during the pulling process.

6. The pull-out sensing structure for a pull-out faucet according to claim 5, characterized in that: The faucet body (1) is also provided with a valve core (8), and the valve seat (6) is provided with a mixing inlet hole (6b) and a mixing outlet hole (6c) that connect the valve core (8). Water flows through the mixing outlet hole (6c) of the valve seat (6) into the internal flow channel of the valve core (8), and after being controlled by the valve core (8), it enters the valve seat (6) through the mixing inlet hole (6b) of the valve seat (6), and then flows to the inlet end of the pull tube assembly (2) through the solenoid valve (5).

7. The pull-out sensing structure for a pull-out faucet according to claim 6, characterized in that: The valve core (8) is horizontally disposed on the faucet body (1). The side of the valve seat (6) is provided with a mating surface (6d) that communicates and connects with the valve core (8). The mixing inlet hole (6b) and the mixing outlet hole (6c) are disposed on the mating surface (6d), and the inlet and outlet flow channels of the valve core (8) are correspondingly connected with the mixing inlet hole (6b) and the mixing outlet hole (6c) on the mating surface (6d).

8. The pull-out sensing structure for a pull-out faucet according to claim 6, characterized in that: The valve seat (6) has an outlet (6e) and an inlet (6f) at its bottom. The outlet (6e) is connected to the inlet end of the solenoid valve (5), and the inlet (6f) is used to connect to an external inlet pipe (6g).

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