A nozzle assembly and pore cleaning device

Abstract

The application discloses a nozzle assembly and a pore cleaning instrument, and relates to the technical field of beauty instruments. The nozzle assembly comprises a fixed support, a movable nozzle, a linkage and a sensing element. The movable nozzle is slidably connected to the fixed support. One end of the linkage is rotatably connected to the movable nozzle, and the other end of the linkage is rotatably connected to the fixed support. The linkage is provided with a flange. The sensing element is arranged on the fixed support. When the movable nozzle slides, the linkage can be driven to rotate, and the flange can be driven to rotate to press against the sensing element when the linkage rotates, so that the sensing element sends a control signal. The control signal can be fed back to a driving assembly, so that the driving assembly can reduce the negative pressure formed on the movable nozzle in real time. Therefore, in the process that the nozzle is separated from the skin, the negative pressure can be actively reduced in time, the sharp release of the negative pressure at the nozzle port is effectively inhibited, and the pulling force on the local skin is significantly reduced, so that circular blood stasis marks on the skin are avoided.

Description

Technical Field

[0001] This invention relates to the field of beauty instrument technology, specifically to a nozzle assembly and a pore cleansing device. Background Technology

[0002] A pore cleansing device (also known as a pore suction device) is a beauty care tool that uses negative pressure suction to remove dirt, oil, and dead skin cells from the skin's surface and pores. In recent years, with the increasing awareness of personal skincare and the rapid development of the home beauty device market, pore cleansing devices have become widely popular due to their ease of use and intuitive cleaning results. These devices typically consist of a suction nozzle, a vacuum pump (such as a diaphragm pump), and a drive motor. The motor drives the pump to generate negative pressure, causing the nozzle to adhere to the skin and suck out impurities from the pores. To further enhance the cleaning effect, some products also integrate auxiliary functions such as hot and cold water spray or bubble injection.

[0003] Most current pore cleansing devices use a fixed suction nozzle structure. During the cleansing process, when the user removes the nozzle from the skin, the negative pressure at the nozzle port is released rapidly and momentarily, causing the skin to be subjected to a strong pulling force. This sudden change in negative pressure can not only cause the user to experience a noticeable stinging sensation, but also easily leave circular bruises on the skin, and in severe cases, may even cause damage to capillaries. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a nozzle assembly and pore cleansing device to solve the technical problem that existing pore cleansing devices generally adopt a fixed suction nozzle structure, which causes obvious stinging sensation to the user when the user removes the nozzle from the skin during the cleansing process, and also easily leaves circular bruises on the skin.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a nozzle assembly, comprising: Fixed bracket; The movable nozzle is slidably connected to the fixed bracket; A linkage component, one end of which is rotatably connected to the movable nozzle, and the other end of which is rotatably connected to the fixed bracket, the linkage component having a flange; and A sensing element is disposed on the fixed bracket. When the movable nozzle slides, it can drive the linkage to rotate. When the linkage rotates, it can drive the flange to rotate to press against the sensing element, so that the sensing element sends a control signal.

[0006] In some embodiments, the sensing element is elastic and capable of elastic deformation when pressed by the flange to emit the control signal.

[0007] In some embodiments, the sensing element includes a leaf spring and a strain gauge sensor, the strain gauge sensor being connected to the leaf spring, one end of the leaf spring being connected to the fixed bracket, and the other end of the leaf spring being elastically deformed when pressed by the flange to drive the strain gauge sensor to deform and emit the control signal.

[0008] In some embodiments, the nozzle assembly further includes a torsion spring, the linkage is rotatably connected to the fixed bracket via the torsion spring, the torsion spring can drive the flange away from the sensing element by its own elastic force, and when the linkage rotates to drive the flange to press against the sensing element, the linkage drives the torsion spring to accumulate elastic potential energy.

[0009] In some embodiments, the movable nozzle includes a bushing and a waterproof sliding bearing, the inner wall of the fixed bracket is provided with a movable groove, the waterproof sliding bearing is fixedly disposed on the outer wall of the bushing, and the bushing is slidably connected to the movable groove through the waterproof sliding bearing.

[0010] In some embodiments, the movable nozzle further includes a connecting frame and a nozzle head, one end of the connecting frame being detachably snapped into the bushing, and the other end of the connecting frame being detachably inserted into the nozzle head. The connecting frame has a spaced first channel and a second channel, both of which communicate with the interior of the bushing and the nozzle head.

[0011] In some embodiments, the end of the connecting bracket facing the inside of the bushing has a first insertion protrusion and a second insertion protrusion, the first channel passing through the first insertion protrusion and the second channel passing through the second insertion protrusion.

[0012] Secondly, the present invention also provides a pore cleansing device, including a housing, a main control board, a drive assembly, and the aforementioned nozzle assembly. The main control board and the nozzle assembly are both disposed in the housing, and the drive assembly is disposed inside the housing. The main control board connects the drive assembly and the sensing element. The drive assembly is connected to the movable nozzle and is used to drive the movable nozzle to form negative pressure and replenish water to the movable nozzle. When the sensing element sends a control signal, the main control board can control the drive assembly to reduce the negative pressure formed on the movable nozzle.

[0013] In some embodiments, the drive assembly includes a motor, a diaphragm pump, a negative pressure pipe, a water supply pipe, and a drain pipe. The motor is connected to the diaphragm pump, which has an inlet and an outlet. One end of the negative pressure pipe is connected to the inlet, and the other end is connected to the movable nozzle. One end of the drain pipe is connected to the outlet, and one end of the water supply pipe is connected to the movable nozzle.

[0014] In some embodiments, the pore cleansing device further includes a clean water tank and a wastewater tank, the clean water tank being connected to the other end of the water supply pipe and the wastewater tank being connected to the other end of the wastewater discharge pipe.

[0015] Compared with existing technologies, the nozzle assembly provided by this invention slidably connects a movable nozzle to a fixed bracket, and sets a linkage between the movable nozzle and the fixed bracket. When the user removes the nozzle from the skin, the negative pressure adsorption of the nozzle on the skin causes the skin to pull the movable nozzle relative to the fixed bracket, causing the linkage to rotate. This causes the flange on the linkage to press against a sensing element, which then sends a control signal. This control signal can be fed back to the drive assembly, causing the drive assembly to reduce the negative pressure formed on the movable nozzle in real time. Thus, during the process of the nozzle detaching from the skin, the negative pressure can be reduced in a timely and proactive manner, effectively suppressing the rapid release of negative pressure at the nozzle port, thereby significantly reducing the local pulling force on the skin and avoiding the appearance of circular bruises on the skin. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the nozzle assembly provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the linkage structure provided in an embodiment of the present invention; Figure 3 This is a cross-sectional schematic diagram of the nozzle assembly provided in an embodiment of the present invention; Figure 4 This is an internal schematic diagram of the pore cleansing device provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the liquid flow in the pore cleansing device provided in an embodiment of the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0018] To address the technical problem that existing pore cleansing devices generally employ a fixed suction nozzle structure, which causes significant stinging and leaves circular bruises on the skin when the user removes the nozzle during the cleansing process, this invention provides a nozzle assembly and pore cleansing device. This assembly enables timely and proactive reduction of negative pressure as the nozzle detaches from the skin, effectively suppressing the rapid release of negative pressure at the nozzle port. This significantly reduces the pulling force on the skin and prevents circular bruises from appearing on the skin.

[0019] It should be noted that the nozzle assembly described in this invention is used in, but not limited to, pore cleansing devices. For ease of explanation, this invention will only use the application of the nozzle assembly in a pore cleansing device as an example. The principle of the nozzle assembly in other types of devices is essentially the same as that in a pore cleansing device, and will not be described in detail here.

[0020] Please see Figures 1 to 3 , Figure 1 This is a schematic diagram of the nozzle assembly 100 in one embodiment of the present invention. The nozzle assembly 100 includes a fixed bracket 1, a movable nozzle 2, a linkage member 3, and a sensing member 4. The movable nozzle 2 is slidably connected to the fixed bracket 1. One end of the linkage member 3 is rotatably connected to the movable nozzle 2, and the other end of the linkage member 3 is rotatably connected to the fixed bracket 1. The linkage member 3 has a flange 31. The sensing member 4 is disposed on the fixed bracket 1. When the movable nozzle 2 slides, it can drive the linkage member 3 to rotate. When the linkage member 3 rotates, it can drive the flange 31 to rotate to press against the sensing member 4, so that the sensing member 4 sends a control signal.

[0021] In this embodiment, the fixing bracket 1 can be injection molded from engineering plastic (such as ABS or PC / ABS alloy). The fixing bracket 1 has an internal hollow cavity to accommodate the movable nozzle 2 and allow it to slide. The movable nozzle 2 is mainly used for contact with the skin. The pore cleanser can deliver liquid to the movable nozzle 2, allowing the liquid to be applied to the skin surface for hydration. Simultaneously, the pore cleanser can also create negative pressure on the movable nozzle 2, causing it to absorb dirt from the skin surface for cleansing. The outer wall of the fixing bracket 1 can be provided with a snap-fit ​​connection structure for detachable connection to the housing of the pore cleanser. The movable nozzle 2 slides along the axial direction of the fixing bracket 1, and its sliding stroke can be set to 3-7mm. This stroke range is sufficient to cover the displacement changes of the movable nozzle 2 from contact with the skin to its initial disengagement. The linkage 3 has through-holes 32 on both sides of one end and through-holes 33 on the other end. The two first rotating holes 32 are rotatably connected to the movable nozzle 2 via pins, and the second rotating hole 33 is rotatably connected to the fixed bracket 1. A flange 31 is formed in the middle of the linkage 3, protruding towards the sensing element 4. The protrusion height can be determined according to the installation position of the sensing element 4 and the required pressure. When the movable nozzle 2 is subjected to an outward peeling force, the movable nozzle 2 slides outward along the fixed bracket 1, driving the linkage 3 to rotate around its connection point with the fixed bracket 1 via the pin. This causes the flange 31 to rotate towards the sensing element 4 and gradually press against the sensing element 4, thereby converting the mechanical displacement into a detectable control signal. The pore cleansing device can automatically reduce the negative pressure formed on the movable nozzle according to this control signal. Thus, during the process of the nozzle detaching from the skin, the negative pressure can be reduced in a timely and proactive manner, effectively suppressing the rapid release of negative pressure at the nozzle port, thereby significantly reducing the pulling force on the local skin and avoiding the appearance of circular bruises on the skin.

[0022] The sensor 4 is mainly used to detect changes in the movement of the movable nozzle 2 as it detaches from the skin, thereby generating a control signal to reduce the negative pressure formed on the movable nozzle. In one embodiment, please refer to... Figure 1 and Figure 3 In this embodiment, the sensing element 4 is elastic and can undergo elastic deformation when pressed by the flange 31 to send a control signal. In this embodiment, the sensing element 4 can be an elastic component such as a metal sheet, a rubber elastomer, or a spring. One end of the sensing element 4 is fixed to the fixed bracket 1, and the other end of the sensing element 4 is the pressure end. When the flange 31 presses against the pressure end of the sensing element 4, the sensing element 4 can undergo elastic bending. When this deformation reaches a preset threshold, a control signal is triggered. The elastic coefficient of the sensing element 4 is determined according to the force transmission ratio of the linkage 3 and the required detection sensitivity. It is generally set to produce significant deformation under a pressure of 0.5-3N to ensure that the small force changes at the initial stage of nozzle peeling can be sensitively detected.

[0023] Further, please refer to Figure 3 The sensing element 4 includes a leaf spring 41 and a strain gauge sensor 42. The strain gauge sensor 42 is connected to the leaf spring 41. One end of the leaf spring 41 is connected to the fixed bracket 1, and the other end of the leaf spring 41 can undergo elastic deformation when pressed by the flange 31, thereby driving the strain gauge sensor 42 to deform and send a control signal. In this embodiment, the leaf spring 41 can be made of stainless steel spring steel. One end of the leaf spring 41 is fixed to the fixed bracket 1 by rivets, and the other end of the leaf spring 41 is suspended to form a cantilever beam structure. The strain gauge sensor 42 is attached to the surface of the leaf spring 41 facing away from the flange 31, and the strain gauge sensor 42 is connected to the main control board of the pore cleaner through a lead wire. When the flange 31 presses against the free end of the leaf spring 41, the leaf spring 41 bends and deforms, and the strain gauge sensor 42 attached to its surface generates a change in resistance. This change in resistance is converted into a voltage signal output by a Wheatstone bridge circuit. The main control board determines the degree of nozzle peeling based on the magnitude of the voltage signal and adjusts the driving force and speed of the motor in real time. The sensitivity coefficient of strain gauge sensor 42 is selected according to the required control accuracy, and it should generally be able to distinguish leaf spring deformation at the level of 0.1mm.

[0024] In other embodiments, the sensing element 4 can also be replaced by a pressure sensor. When the flange 31 presses against the pressure sensor, it can drive the pressure sensor to generate a control signal. The magnitude of the pressure is positively correlated with the suction force of the movable nozzle 2 on the skin. The pressure sensor can also be set with a pressure threshold. When the pressure of the flange 31 against the pressure sensor exceeds the preset pressure threshold, the pressure sensor generates a control signal, and the pore cleansing device automatically reduces the negative pressure formed on the movable nozzle according to the control signal.

[0025] In one embodiment, please refer to Figure 3The nozzle assembly 100 also includes a torsion spring 5. The linkage 3 is rotatably connected to the fixed bracket 1 via the torsion spring 5. The end of the linkage 3 has a limiting hook 34, which is connected to one end of the torsion spring 5. The torsion spring 5 can drive the flange 31 to disengage from the sensing element 4 through its own elastic force. When the linkage 3 rotates and drives the flange 31 to press against the sensing element 4, the linkage 3 drives the torsion spring 5 to accumulate elastic potential energy. In this embodiment, the torsion spring 5 is sleeved on the pin connecting the linkage 3 and the fixed bracket 1. One end of the torsion spring 5 is engaged with the fixed bracket 1, and the other end is engaged with the linkage 3. In the natural state where the nozzle is not subjected to peeling force, the elastic force of the torsion spring 5 drives the linkage 3 to remain in the initial position. At this time, a gap of 1-2 mm is maintained between the flange 31 and the sensing element 4 to avoid the sensing element 4 being under pressure for a long time, which would lead to signal drift or fatigue damage. When the movable nozzle 2 slides outward under the peeling force, the linkage 3 rotates against the elastic force of the torsion spring 5, and the flange 31 gradually approaches and presses against the sensing element 4. At the same time, the torsion spring 5 accumulates elastic potential energy. When the peeling force disappears, the torsion spring 5 releases its elastic potential energy, driving the linkage 3 to rotate in the opposite direction and reset. The flange 31 disengages from the sensing element 4, the sensing element 4 returns to its free state, and the system returns to normal operation. The stiffness of the torsion spring 5 is determined based on the sliding resistance of the movable nozzle 2 and the required reset force. It should be ensured that the movable nozzle 2 will not be falsely triggered by the force of the torsion spring 5 under normal operating negative pressure.

[0026] In one embodiment, please refer to Figure 3 The movable nozzle 2 includes a bushing 21 and a waterproof sliding bearing 22. A movable groove 11 is formed on the inner wall of the fixed bracket 1. The waterproof sliding bearing 22 is fixedly mounted on the outer wall of the bushing 21, and the bushing 21 is slidably connected to the movable groove 11 via the waterproof sliding bearing 22. In this embodiment, the bushing 21 is a hollow tubular structure, and its outer diameter matches the inner diameter of the movable groove 11, with a clearance of approximately 0.2 mm to ensure smooth sliding without significant shaking. The waterproof sliding bearing 22 can be a self-lubricating polymer sliding bearing, such as an oil-free bushing made of polyoxymethylene (POM), polytetrafluoroethylene (PTFE) composite material, or oil-impregnated nylon. It has self-lubricating, water-resistant, and low friction coefficient characteristics, enabling it to maintain smooth sliding for a long time in humid environments and preventing the grease from being washed away by cleaning fluid. The waterproof sliding bearing 22 is fixed to the outer wall of the bushing 21 by snap-fit, and the outer surface of the waterproof sliding bearing 22 slides in contact with the groove wall of the movable groove 11.

[0027] In one embodiment, please refer to Figure 3The movable nozzle 2 also includes a connecting frame 23 and a nozzle head 24. One end of the connecting frame 23 is detachably snapped into the bushing 21, and the other end of the connecting frame 23 is detachably inserted into the nozzle head 24. The connecting frame 23 has a first channel 231 and a second channel 232 spaced apart, both of which connect the inside of the bushing 21 and the nozzle head 24. In this embodiment, the connecting frame 23 can be injection molded from transparent ABS plastic. The inner wall of the connecting frame 23 has snap-fit ​​protrusions, and the outer wall of the bushing 21 has corresponding snap-fit ​​grooves. The connecting frame 23 and the bushing 21 are detachably connected through the snap-fit ​​protrusions and snap-fit ​​grooves, facilitating cleaning and replacement. The nozzle head 24 is an approximately funnel-shaped suction nozzle made of silicone or soft plastic. The tail of the nozzle head 24 has an insertion tube, which is interference-fitted into the end interface of the connecting frame 23, enabling detachable replacement. The first channel 231 is a negative pressure suction channel with an orifice diameter of 3-6 mm, used to connect the negative pressure generated by the diaphragm pump to the nozzle head 24 port; the second channel 232 is a liquid delivery channel with an orifice diameter of 1-3 mm, used to deliver cleaning fluid, warm water, or air bubbles to the nozzle head 24 port. The first channel 231 and the second channel 232 are arranged parallel and spaced apart inside the connecting frame 23, and are not interconnected, and are respectively connected to the drive assembly through hoses.

[0028] A waterproof O-ring 235 is snapped onto the outer wall of the connecting bracket 23. The outer wall of the waterproof O-ring 235 elastically abuts against the inner wall of the nozzle head 24 to prevent cleaning fluid from overflowing and damaging the sensing element 4.

[0029] The nozzle head 24 has a negative pressure port 241 on the side away from the connecting frame 23. The negative pressure port 241 is connected to the first channel 231 and is used to adhere to the user's skin surface, forming a closed space with the skin. The nozzle head 24 has a liquid outlet channel 242, which is connected to the second channel 232. The cleaner can drive clean liquid through the second channel 232 and the liquid outlet channel 242 to reach the skin surface for cleansing and moisturizing. A step is formed inside the nozzle head 24. The connecting frame 23 abuts against the step, forming a buffer space 243 between the connecting frame 23 and the nozzle head 24. The buffer space 243 is connected to the negative pressure port 241 and the first channel 231. Wastewater generated during skin cleansing can be automatically sucked into the buffer space 243 by the negative pressure applied by the cleaner, and then enters the first channel 231 from the buffer space 243. The first channel 231 is connected to the suction port 821 of the diaphragm pump 82 via the negative pressure pipe 83. The dirt, sewage, and air sucked in are sent to the sewage tank 20 through the sewage pipe 85 after passing through the diaphragm pump 82. The sewage tank 20 receives the sewage generated from skin cleaning. The cleansing device is also equipped with a clean water tank 10, which can store beauty essence. Under the action of negative pressure at the nozzle 24 port, the beauty essence reaches the skin surface through the water supply pipe 84, the second channel 232, and the liquid outlet channel 242.

[0030] In one embodiment, please refer to Figure 3 The connecting frame 23 has a first insertion protrusion 233 and a second insertion protrusion 234 at one end facing the inside of the bushing 21. A first channel 231 passes through the first insertion protrusion 233, and a second channel 232 passes through the second insertion protrusion 234. In this embodiment, the first insertion protrusion 233 and the second insertion protrusion 234 are cylindrical tubular structures integrally formed with the connecting frame 23. The outer diameters of the first insertion protrusion 233 and the second insertion protrusion 234 are adapted to the inner diameters of the negative pressure hose and the water supply hose, respectively, and communication with the drive component is achieved through hose insertion. The ends of the first insertion protrusion 233 and the second insertion protrusion 234 may be provided with chamfers or guide cone surfaces to facilitate quick hose insertion. After insertion, the hoses can be fixed by elastic clamps or cable ties to prevent them from falling off under negative pressure.

[0031] Secondly, please refer to Figure 4 The present invention also provides a pore cleansing device 200, including a housing 6, a main control board 7, a drive assembly 8, and the aforementioned nozzle assembly 100. The main control board 7 and the nozzle assembly 100 are both disposed in the housing 6. The drive assembly 8 is disposed inside the housing 6. The main control board 7 is connected to the drive assembly 8 and the sensing element 4. The drive assembly 8 is connected to the movable nozzle 2 and is used to drive the movable nozzle 2 to form negative pressure and to replenish water to the movable nozzle 2. When the sensing element 4 sends a control signal, the main control board 7 can control the drive assembly 8 to reduce the negative pressure formed on the movable nozzle 2. In this embodiment, the housing 6 is an ergonomic handheld housing, which can be injection molded from ABS plastic. An installation cavity is formed inside the housing 6 to fix components such as the main control board 7, drive assembly 8, and battery 9. The battery 9 is connected to the main control board 7 and provides power to it. The lower part of the housing 6 also has a clean water tank 10 and a wastewater tank 20. The clean water tank 10 stores cleaning fluid or beauty essence, and the wastewater tank 20 receives wastewater generated after skin washing. An exhaust port 201 is provided at the top of the wastewater tank 20. The outer wall of the housing 6 has a power switch, gear adjustment keys, and a display screen, among other human-computer interaction interfaces. The main control board 7 is a PCBA (Printed Circuit Board Assembly), integrating a microcontroller (MCU), motor drive circuit, signal conditioning circuit, and power management circuit. The main control board 7 is electrically connected to the sensing element 4 (strain gauge sensor 42) via a ribbon cable or FPC flexible board. It receives the analog voltage signal output by the sensing element 4, converts it via AD conversion, and then the MCU performs threshold judgment and PID calculation, outputting a PWM control signal to the motor drive circuit. The main control board 7 has a built-in control algorithm. When the signal value output by the sensor 4 reaches the preset threshold, the main control board 7 immediately reduces the duty cycle of the motor drive PWM to reduce the motor speed and thus reduce the negative pressure generated by the diaphragm pump. When the signal value continues to increase, the duty cycle can be further reduced until the motor stops, so as to achieve smooth attenuation of the negative pressure and avoid drastic changes.

[0032] In one embodiment, please refer to Figure 4 and Figure 5 The drive assembly 8 includes a motor 81, a diaphragm pump 82, a negative pressure pipe 83, a water supply pipe 84, and a sewage pipe 85. The motor 81 is connected to the diaphragm pump 82, which has an inlet 821 and an outlet 822. One end of the negative pressure pipe 83 is connected to the inlet 821, and the other end is connected to the first insertion protrusion 233 of the movable nozzle 2. One end of the sewage pipe 85 is connected to the outlet 822, and the other end is connected to the sewage tank 20. One end of the water supply pipe 84 is connected to the second insertion protrusion 234 of the movable nozzle 2, and the other end is connected to the clean water tank 10. In this embodiment, the motor 81 can be a brushed DC motor or a brushless DC motor with a rated voltage of 3.7-12V and a rated speed of 3000-8000rpm. To facilitate real-time closed-loop control of suction, the motor 81 is preferably a brushless DC motor, and is equipped with a microcontroller with 32-bit computing capabilities to improve the response speed and resolution of speed adjustment. The output shaft of the motor 81 is directly or through a coupling connected to the eccentric cam of the diaphragm pump 82.

[0033] The diaphragm pump 82 is a positive displacement (reciprocating) pump, comprising an eccentric cam, a rocker plate, a rubber diaphragm, a pump chamber, a valve plate, and an umbrella-shaped check valve. The eccentric cam is fixed to the output shaft of the motor 81 and has inclined columns relative to the axis. Each arm of the rocker plate is respectively fitted onto the column of the rubber diaphragm. Since the rubber diaphragm can extend and retract but cannot rotate, the rocker plate is stopped from rotating. Therefore, the rotation of the motor 81 is converted into the rotation of the rocker plate around the axis, and then into the reciprocating motion of the rubber diaphragm. When the diaphragm retracts, the volume of the pump chamber increases, creating a negative pressure. The suction valve is pushed open, and the discharge valve is pressed closed, allowing the gas-liquid mixture to enter the pump chamber through the suction port 821. When the diaphragm advances, the volume of the pump chamber decreases, creating pressure. The suction valve closes, and the discharge valve is pushed open, allowing the fluid to be discharged through the discharge port 822. The umbrella-shaped check valves mentioned above are all rubber valves, without springs or electromagnets. They open and close automatically only by the pressure difference inside and outside the chamber, therefore the opening pressure is extremely low, and they can reliably operate even with air bubbles.

[0034] In one specific embodiment, the diaphragm pump 82 adopts a three-chamber parallel structure, with the phases of the three chambers staggered by 120°, thereby reducing flow pulsation, vibration, and noise, and ensuring balanced shaft load on the motor 81. The tilt angle of the oscillating disc is approximately 15°, the pitch circle radius of the diaphragm is approximately 6.5 mm, resulting in a stroke of approximately 3.4 mm. The theoretical displacement of a single chamber is approximately 0.17 mL / rpm, and the total displacement of all three chambers is approximately 0.5 mL / rpm, with a theoretical flow rate of approximately 1.5 L / min at 3000 r / min. The diaphragm pump 82 has a very small clearance volume at the end of discharge (approximately 1 mm, with a compression ratio of approximately 4.4:1). Therefore, even if the pump chamber is entirely filled with air, it can raise the pressure to above the discharge pressure. Thus, the pump has self-priming capability, does not experience airlock due to air bubbles, and can continuously transport gas-liquid mixtures composed of dirt, sewage, and air. The nominal flow rate of the diaphragm pump 82 is approximately 2 L / min. It can generate a negative pressure of approximately -60 kPa on its suction side and a maximum pressure of approximately 120 kPa on its discharge side. It should be noted that the pump body of the drive assembly 8 is not limited to a diaphragm pump; other positive displacement pumps such as peristaltic pumps and piston pumps can also be used, as long as they can change the negative pressure formed on the movable nozzle 2 under the control of the main control board 7.

[0035] The negative pressure pipe 83, water supply pipe 84, and sewage discharge pipe 85 are all made of silicone flexible tubing, which has a certain degree of elasticity and negative pressure resistance. Under normal operating conditions, the motor 81 operates at a set speed, generating negative pressure at the nozzle head 24 port to achieve pore cleaning. When the sensor 4 detects a peeling signal, the main control board 7 controls the motor 81 to linearly reduce its speed to idle or stop within 100-500ms, so that the negative pressure smoothly decays to near atmospheric pressure, thereby avoiding severe skin pulling.

[0036] The outlet 822 of the diaphragm pump 82 is connected to the wastewater tank 20 via the drain pipe 85, so that the wastewater tank 20 receives the dirt and wastewater sucked in by the movable nozzle 2 and discharged by the diaphragm pump 82. The air sucked in along with the wastewater is discharged to the outside of the casing 6 through the exhaust port 201 at the top of the wastewater tank 20, while the wastewater is retained in the wastewater tank 20, thereby achieving the separation of clean water and wastewater. The clean water tank 10 is connected to the second insertion protrusion 234 of the movable nozzle 2 via the water supply pipe 84. When the diaphragm pump 82 is working, a negative pressure is formed at the negative pressure port 241 of the nozzle head 24. This negative pressure sucks out dirt through the first channel 231, and at the same time, it also causes the liquid in the clean water tank 10 to be sucked into the water supply pipe 84, and then sequentially through the second channel 232 and the liquid outlet channel 242 to reach the skin surface, thereby achieving simultaneous suction and hydration. Since a small amount of air is mixed into the liquid during the suction process, the liquid reaching the skin surface is in the state of microbubble water, which helps to further improve the cleaning effect.

[0037] To better understand this invention, the following is combined with... Figures 1 to 5 The technical solution of the present invention will be described in detail below: During use, the user places the nozzle head 24 against the skin surface to be cleaned, turns on the power switch, and the main control board 7 controls the motor 81 to drive the diaphragm pump 82. The negative pressure tube 83 transmits negative pressure to the nozzle head 24 port, sucking out dirt, oil, and dead skin cells from the skin pores. At the same time, under the action of this negative pressure, the cleaning solution in the clean water tank 10 is sucked to the nozzle head 24 port through the water supply pipe 84, the second channel 232, and the liquid outlet channel 242 and applied to the skin surface to assist in cleaning and soothing the skin. The sucked-out dirt, wastewater, and air enter the diaphragm pump 82 through the first channel 231 and the negative pressure tube 83, and are then sent to the wastewater tank 20 through the drain pipe 85. The air in the wastewater is discharged through the exhaust port 201. During the cleaning process, when the user moves the device or the nozzle head 24 begins to detach from the skin due to changes in facial contours, the nozzle head 24 is subjected to an outward peeling force. This force is transmitted to the bushing 21 through the connecting frame 23, causing the bushing 21 to slide outward along the movable groove 11 of the fixed bracket 1. The sliding of bushing 21 drives the linkage 3 to rotate around its connection point with the fixed bracket 1 via a pin. The flange 31 on the linkage 3 rotates towards the leaf spring 41 and gradually presses against the compressed end of the leaf spring 41, causing elastic deformation of the leaf spring 41. The strain gauge sensor 42 attached to the leaf spring 41 generates a resistance change and outputs a voltage signal. The main control board 7 collects this voltage signal in real time. When the signal value reaches a preset threshold, it determines that the nozzle is in a peeling state and immediately reduces the speed of motor 81 through PWM regulation, smoothly reducing the negative pressure generated by the diaphragm pump 82, thereby suppressing the rapid release of negative pressure at the nozzle port. When the nozzle is completely detached from the skin, the torsion spring 5 releases its elastic potential energy, driving the linkage 3 to rotate in the opposite direction and reset. The flange 31 disengages from the leaf spring 41, the strain gauge sensor 42 returns to its initial state, and the system awaits its next use. During the above process, the negative pressure can be reduced in a timely and proactive manner, effectively suppressing the rapid release of negative pressure at the nozzle port, thereby significantly reducing the pulling force on the local skin, avoiding the appearance of circular bruises on the skin, reducing the user's stinging sensation, and improving the comfort of use.

[0038] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A nozzle assembly, characterized in that, include: Fixed bracket; The movable nozzle is slidably connected to the fixed bracket; A linkage component, one end of which is rotatably connected to the movable nozzle, and the other end of which is rotatably connected to the fixed bracket, the linkage component having a flange; and A sensing element is disposed on the fixed bracket. When the movable nozzle slides, it can drive the linkage to rotate. When the linkage rotates, it can drive the flange to rotate to press against the sensing element, so that the sensing element sends a control signal.

2. The nozzle assembly according to claim 1, characterized in that, The sensing element is elastic and can undergo elastic deformation when pressed by the flange to emit the control signal.

3. The nozzle assembly according to claim 2, characterized in that, The sensing element includes a leaf spring and a strain gauge sensor. The strain gauge sensor is connected to the leaf spring. One end of the leaf spring is connected to the fixed bracket. The other end of the leaf spring can undergo elastic deformation when pressed by the flange, so as to drive the strain gauge sensor to deform and send the control signal.

4. The nozzle assembly according to claim 1, characterized in that, The nozzle assembly also includes a torsion spring, and the linkage is rotatably connected to the fixed bracket through the torsion spring. The torsion spring can drive the flange to disengage from the sensing element through its own elastic force. When the linkage rotates and drives the flange to press against the sensing element, the linkage drives the torsion spring to accumulate elastic potential energy.

5. The nozzle assembly according to claim 1, characterized in that, The movable nozzle includes a bushing and a waterproof sliding bearing. The inner wall of the fixed bracket is provided with a movable groove. The waterproof sliding bearing is fixedly disposed on the outer wall of the bushing. The bushing is slidably connected to the movable groove through the waterproof sliding bearing.

6. The nozzle assembly according to claim 5, characterized in that, The movable nozzle also includes a connecting frame and a nozzle head. One end of the connecting frame is detachably snapped into the bushing, and the other end of the connecting frame is detachably inserted into the nozzle head. The connecting frame has a first channel and a second channel spaced apart, and both the first channel and the second channel communicate with the interior of the bushing and the nozzle head.

7. The nozzle assembly according to claim 6, characterized in that, The connecting bracket has a first insertion protrusion and a second insertion protrusion at one end facing the inside of the bushing, the first channel passing through the first insertion protrusion and the second channel passing through the second insertion protrusion.

8. A pore cleansing device, characterized in that, The device includes a housing, a main control board, a drive assembly, and a nozzle assembly as described in any one of claims 1-7. The main control board and the nozzle assembly are both disposed in the housing. The drive assembly is disposed inside the housing. The main control board connects the drive assembly and the sensing element. The drive assembly connects to the movable nozzle and is used to drive the movable nozzle to form a negative pressure and to replenish water to the movable nozzle. When the sensing element sends a control signal, the main control board can control the drive assembly to reduce the negative pressure formed on the movable nozzle.

9. The pore cleansing device according to claim 8, characterized in that, The drive assembly includes a motor, a diaphragm pump, a negative pressure pipe, a water supply pipe, and a drain pipe. The motor is connected to the diaphragm pump, which has an inlet and an outlet. One end of the negative pressure pipe is connected to the inlet, and the other end is connected to the movable nozzle. One end of the drain pipe is connected to the outlet, and one end of the water supply pipe is connected to the movable nozzle.

10. The pore cleansing device according to claim 9, characterized in that, The pore cleansing device also includes a clean water tank and a wastewater tank. The clean water tank is connected to the other end of the water supply pipe, and the wastewater tank is connected to the other end of the wastewater discharge pipe.

Images