Modularized hair growing instrument

Abstract

The invention discloses a modularly-arranged hair growing instrument which comprises a main body module, a functional tooth-shaped protrusion module and a liquid storage and supply module. The main body module has a power supply system. The functional tooth-shaped bulge module is detachably and electrically connected to the main body module, and the functional tooth-shaped bulge module comprises a liquid guide tooth-shaped bulge with a liquid guide channel; the liquid storage and supply module is provided with a liquid storage cavity and is used for adding liquid into the liquid storage cavity by a user; the liquid storage and supply module is installed between the main body module and the tooth-shaped protrusion module, the liquid guide tooth-shaped protrusion is communicated with the liquid storage cavity, and when the functional tooth-shaped protrusion module is detached from the main body module, a user can add liquid into the liquid storage cavity. By adopting the modular arrangement that the main body module, the liquid storage and supply module and the functional tooth-shaped bulge module can be physically and electrically separated, when a certain module is damaged, the module can be independently replaced at low cost; by adopting the arrangement of the main body module, the liquid storage and supply module and the functional tooth-shaped bulge module, the worry-saving experience feelings that the service life of the product is longer and the later maintenance is more economical and practical are brought to a user.

Description

Technical Field

[0001] This application relates to the field of scalp care equipment technology, and more particularly to a modularly configured hair growth instrument. Background Technology

[0002] With the fast pace of life and increasing work pressure, hair loss is becoming increasingly prevalent among younger people, making scalp care and hair loss prevention / regeneration a focus of attention. Most existing hair regrowth devices use a one-piece encapsulated structure, with functional components fixedly connected to the main body without detachment. If a vulnerable part (such as a blocked or deformed toothed protrusion) or an electronic component fails, it is often difficult to disassemble and replace it individually, forcing users to scrap the entire device or replace the expensive assembly, significantly increasing usage and maintenance costs. Furthermore, existing hair regrowth devices are typically bulky (containing batteries, motors, liquid reservoirs, etc.), requiring users to carry the cumbersome device when out and about or when only simple application and combing are needed, making it inconvenient for users. Summary of the Invention

[0003] In view of the fact that most hair growth instruments in the prior art adopt a structure in which each functional component is deeply integrated with the main unit, making it difficult to disassemble and replace them individually, users often have to scrap the entire machine or replace the expensive assembly, which greatly increases the cost of use and maintenance, as well as the problem that users cannot disassemble and carry a certain component separately, this invention provides a modular hair growth instrument to solve the above technical problems.

[0004] The technical solution adopted by this invention to solve its technical problem is: a modular hair growth instrument, including a main module, a functional toothed protrusion module, and a liquid storage and supply module; the main module has a power supply system; the functional toothed protrusion module is detachably electrically connected to the main module, and the functional toothed protrusion module includes a liquid-guiding toothed protrusion with a liquid-guiding channel; the liquid storage and supply module has a liquid storage cavity, and the liquid storage and supply module is used for the user to add liquid to the liquid storage cavity; the liquid storage and supply module is installed between the main module and the toothed protrusion module, and the liquid-guiding toothed protrusion communicates with the liquid storage cavity; when the functional toothed protrusion module is detached from the main module, the user can add liquid to the liquid storage cavity.

[0005] The beneficial effects of this invention are as follows: This invention provides a modular hair growth instrument. By adopting a modular design in which the main body module, liquid storage and supply module, and functional toothed protrusion module are physically and electrically separable, a low-cost replacement can be made independently when a module is damaged. Compared with the existing technology that uses an integrated packaging structure, where the functional components are fixedly connected to the main body and often require scrapping the entire machine or replacing expensive assemblies once a part is damaged, the design of the main body module, liquid storage and supply module, and functional toothed protrusion module provides users with a longer product lifespan and more economical maintenance, offering a worry-free experience. Attached Figure Description

[0006] Figure 1 This is a three-dimensional view of the hair growth instrument provided by the present invention; Figure 2 This is a three-dimensional view of the hair growth instrument provided by the present invention from another perspective; Figure 3 This is an exploded view of the modular design of the hair growth instrument provided by this invention; Figure 4 This is a partial structural schematic diagram of the hair growth instrument provided by the present invention; Figure 5 This is another partial structural schematic diagram of the hair growth instrument provided by the present invention; Figure 6 This is an exploded view of the hair growth instrument provided by this invention; Figure 7 This is an exploded view of the hair growth instrument provided by the present invention from another perspective. Detailed Implementation

[0007] To make the objectives, technical solutions, and effects of this invention clearer and more explicit, 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 of the invention and are not intended to limit the invention.

[0008] Please see Figures 1-7The present invention provides a main module 100, a functional toothed protrusion module 200, and a liquid storage and supply module 300. The main module 100 has a power supply system; the functional toothed protrusion module 200 is detachably electrically connected to the main module 100, and the functional toothed protrusion module 200 includes a liquid-guiding toothed protrusion 12 with a liquid-guiding channel; the liquid storage and supply module 300 has a liquid storage chamber, and the liquid storage and supply module 300 is used for users to add liquid to the liquid storage chamber; the liquid storage and supply module 300 is installed between the main module 100 and the toothed protrusion module, and the liquid-guiding toothed protrusion 12 communicates with the liquid storage chamber. When the functional toothed protrusion module 200 is detached from the main module 100, the user can add liquid to the liquid storage chamber. By adopting a modular design where the main module 100, the liquid storage and supply module 300, and the functional toothed protrusion module 200 are physically and electrically separable, a single module can be replaced independently at low cost when damaged. For example, if the toothed protrusion of the functional toothed protrusion module 200 undergoes irreversible deformation or the shell of the main module 100 breaks, either the functional toothed protrusion module 200 or the main module 100 can be replaced separately without the need to purchase the entire unit, effectively reducing user operating and maintenance costs. Simultaneously, this modular design also facilitates product upgrades. Users can replace or upgrade specific modules according to their needs, such as replacing different types of functional toothed protrusion modules 200 to achieve different hair growth care functions, or upgrading the liquid storage and supply module 300 to adapt to different liquid storage requirements, greatly improving the product's flexibility and applicability.

[0009] The preferred liquid-guiding channel with toothed protrusions 12 features a spiral flow path, with 3-5 micropores (0.1-0.3 mm in diameter) at the end. These micropores are tilted at a 30° angle towards the scalp to ensure the medication directly targets the hair follicle opening. The flow path is made of medical-grade polypropylene (PP), with a hydrophobic inner wall to prevent medication adhesion and retention. A pressure sensor is integrated at the end of the toothed protrusions, triggering the pump upon contact with the scalp for "contact drug delivery," avoiding empty pump losses. The inner wall of the outlet hole at the end of the outlet channel is hydrophobic (e.g., coated with polytetrafluoroethylene). After each liquid delivery, the air pump reverses airflow for 0.1 seconds, using negative pressure to remove residual medication from the hole, preventing drying and clogging. A filter screen (50 μm pore size) is installed near the outlet hole to filter particulate impurities from the medication.

[0010] In this embodiment, the outer surface of the main module 100 is provided with a receiving groove 202 for fitting the functional toothed protrusion module 200. A magnetic suction member 15 is provided inside the main module 100 and below the receiving groove 202. The functional toothed protrusion module 200 is provided with an attachment magnetic suction member 150. When the functional toothed protrusion module 200 is installed in the receiving groove 202, it is fixed in place by the mutual attraction of the magnetic suction member 15 and the attachment magnetic suction member 150. This structure enables quick assembly and disassembly and secure connection between the functional toothed protrusion module 200 and the main module 100. The mutual attraction of the magnetic suction member 15 and the attachment magnetic suction member 150 provides sufficient connection strength, ensuring that the functional toothed protrusion module 200 will not easily detach from the main module 100 during daily use such as combing hair, thus guaranteeing reliability and safety. Meanwhile, the magnetic connection method is convenient to operate. Users only need to align the functional toothed protrusion module 200 with the receiving groove 202 and gently bring it close. Under the action of magnetism, it will automatically complete the positioning and fixation. Disassembly only requires a certain amount of external force to separate it. After separation, users can add liquid to the storage chamber without the need for complicated tools, which greatly improves the user experience and meets users' needs for ease of use. Moreover, this non-rigid connection method of magnetic attraction can also buffer the impact and vibration that may occur during use to a certain extent, which can protect the electronic components and mechanical structure inside the module and extend the service life of the module.

[0011] Furthermore, the outer surface of the toothed protrusions of the housing is coated with metallic paint, particularly the bottom of the housing. This metallic paint forms the magnetic attraction element 150, which is a magnetic block. The metallic paint applied to the bottom of the housing and other locations allows for a stable magnetic attraction force with the magnetic block of the main module 100. The uniform coverage of the metallic paint ensures a more balanced attraction force, preventing installation misalignment caused by excessive or insufficient local attraction. Simultaneously, the texture of the metallic paint enhances the metallic feel and overall aesthetics of the product.

[0012] Alternatively, both the attaching magnetic element 150 and the magnetic element 15 can be magnetic blocks, with the attaching magnetic element 150 disposed within the first mounting cavity and corresponding to the magnetic element 15. The two magnetic blocks generate a stronger magnetic attraction force, further enhancing the stability of the connection between the functional toothed protrusion module 200 and the main module 100. Even when combing thick or tangled hair, it effectively prevents the functional toothed protrusion module 200 from accidentally falling off. The corresponding arrangement of the magnetic blocks allows for more precise positioning and installation through the interaction of magnetic fields, avoiding any impact on the normal operation of the module due to deviations in the adsorption position. Alternatively, the attaching magnetic element 150 can be both a metal coating layer and a magnetic block, resulting in better stability of the module body and a better product texture.

[0013] In this embodiment, the functional toothed protrusion module 200 includes a first upper housing 3, a first lower housing 6, and a first mounting cavity. The first upper housing 3 and the first lower housing 6 are detachably connected. The first upper housing 3 and the first lower housing 6, when connected, form the first mounting cavity. The bottom wall of the first lower housing 6 has a first opening 61. The liquid storage and supply module 300 is disposed within the first mounting cavity, and the liquid inlet 302 of the liquid storage and supply module 300, communicating with the liquid storage cavity, is correspondingly located at the first opening 61. The detachable connection between the first upper housing 3 and the first lower housing 6 facilitates the inspection, maintenance, or replacement of the liquid storage and supply module 300 and other components inside the functional toothed protrusion module 200. When the liquid storage and supply module 300 experiences blockages, leaks, or other malfunctions, or when the internal liquid guiding channel needs cleaning, the user can easily disassemble the first upper housing 3 and the first lower housing 6 to operate on the components within the first mounting cavity without scrapping the entire functional toothed protrusion module 200, further reducing maintenance difficulty and cost. For example, if the sealing ring of the liquid storage chamber ages and causes leakage, the sealing ring can be replaced separately after disassembling the housing, without replacing the entire functional toothed protrusion module 200. If the user feels that the liquid storage tank 303 in the liquid storage and supply module 300 is too large or too small, or if the manufacturer needs to add expansion components to the functional toothed protrusion module 200 to improve its performance, the original liquid storage and supply module 300 can be removed by disassembling the first upper housing 3 and the first lower housing 6, and replaced with a liquid storage and supply module 300 with a more suitable capacity or a module integrating new functional expansion components. Thus, without replacing the entire functional toothed protrusion module 200, the liquid storage capacity can be adjusted or the function enhanced. Unlike the existing technology, where hair growth instruments use a liquid storage bottle mounting cavity to place the liquid storage bottle, which is essentially an external liquid storage bottle, the size and shape of the liquid storage bottle are completely limited by the specifications of the liquid storage bottle mounting cavity, making it impossible to adapt to liquid storage bottles of different capacities and shapes. The first opening 61 provides an exposed channel for the inlet 302 of the liquid storage and supply module 300. After the functional toothed protrusion module 200 is detached from the main module 100, the user can directly add liquids such as hair growth solution, nutrient solution, and medicine into the storage cavity through the first opening 61. The operation is intuitive and convenient. Compared with the limitations of existing technologies where the liquid storage bottle must be embedded in a fixed installation cavity, resulting in a single specification and no expansion, this provides users with a flexible customization experience that allows them to freely switch between different capacities (such as large capacity for home use and portable travel models) or different shapes of liquid storage modules according to the usage scenario. This detachable cap design also facilitates the production and assembly process, making it easier to accurately install components such as the liquid storage and supply module 300 into the first installation cavity, thereby improving production efficiency.

[0014] Furthermore, the inner surface of the sidewall of the first upper housing 3 is provided with snap-fit ​​blocks around its perimeter, and the inner surface of the sidewall of the first lower housing 6 is provided with snap-fit ​​interfaces 62 corresponding to the snap-fit ​​blocks around its perimeter. The first upper housing 3 is detachably connected to the snap-fit ​​blocks via the snap-fit ​​interfaces 62. This snap-fit ​​structure design allows the assembly and disassembly of the first upper housing 3 and the first lower housing 6 without the need for additional tools. The user only needs to manually align the snap-fit ​​interfaces 62 and the snap-fit ​​blocks and apply appropriate pressure to complete the fastening and achieve a stable connection. When disassembly is required, simply pry open the housing from the edge with a little force to disengage the snap-fit ​​blocks from the snap-fit ​​interfaces 62, and the first upper housing 3 and the first lower housing 6 can be easily separated. The operation is simple and quick, greatly reducing the difficulty for users when replacing or maintaining the liquid storage and supply module 300. Alternatively, the inner surface of the sidewall of the first upper housing 3 can be provided with snap-fit ​​interfaces around its perimeter, and the inner surface of the sidewall of the first lower housing 6 can be provided with snap-fit ​​blocks corresponding to the snap-fit ​​interfaces around its perimeter.

[0015] In this embodiment, the functional toothed protrusion module 200 further includes a light-guiding toothed protrusion 1 and a module main board 5. The light-guiding toothed protrusion 1 has a light-guiding hole, and the module main board 5 is electrically connected to a vertical cavity surface-emitting laser (VCSEL). The light-guiding toothed protrusion 1 covers the VCSEL, allowing the light emitted by the VCSEL to exit through the light-guiding hole of the light-guiding toothed protrusion 1. In the prior art, the light-guiding function of hair growth instruments generally uses LED beads, which have low power and severe light scattering. Furthermore, the light-guiding toothed protrusion 1 has a small area and is mostly integrated inside the massage toothed protrusion, resulting in very little effective light reaching the dermal layer of the scalp, limiting the phototherapy effect. This structure uses a vertical cavity surface-emitting laser (VCSEL) instead of traditional LED beads, improving light power density and directionality, and increasing the light penetration efficiency of the dermal layer. By distributing numerous light-guiding toothed protrusions 1 on the periphery and concentrating the fluid-guiding toothed protrusions 12 on the inner ring, the weight distribution balance improves the grip feel.

[0016] A vertical-cavity surface-emitting laser (VCSEL) is integrated into the light guide hole inside the toothed protrusion 1, replacing the traditional LED. VCSELs offer the following advantages: high power density: a single chip can achieve milliwatt-level power, with a small beam divergence angle (approximately 10°~30°), significantly reducing scattering loss; multiple VCSEL chips 27 (such as a 2×2 or 3×3 array) can be integrated on the toothed protrusion end face to form a dense light spot, covering a larger scalp area; the preferred wavelength is 650~850nm red / near-infrared light, matching the absorption peak of hair follicle cell mitochondria, promoting ATP synthesis and cell proliferation. The light guiding function involves the VCSEL laser emitting light from the light guide hole of the toothed protrusion 1. Utilizing its "vertical cavity surface emission" characteristics (less scattering, concentrated power), it ensures that most of the light penetrates the scalp to reach the dermis, activating resting hair follicles and prolonging the hair growth phase.

[0017] The light guide aperture employs a gradient refractive index (GRIN) lens or a micropillar lens array to collimate or focus the light emitted from the VCSEL, ensuring the spot diameter matches the hair follicle distribution density (approximately 1–3 mm), thereby increasing the effective light flux in the dermis (depth 1–3 mm) (target ≥ 5 mW / cm²). The toothed protrusions are made of optical-grade polycarbonate (PC) or PMMA, with a matte finish to reduce reflection, and an internal anti-reflection coating (AR film) to reduce interface loss.

[0018] The heat dissipation and safety design incorporates a micro copper foil heat sink embedded in a toothed protrusion base, which conducts heat to the aluminum alloy frame of the comb body, preventing the VCSEL from overheating during long-term operation (temperature rise ≤10℃). Built-in optical power sensor monitors output intensity in real time and dynamically adjusts drive current with MCU to prevent light damage (safety threshold ≤30mW / cm2).

[0019] The spacing between the serrated protrusions is set to 2-3mm to avoid mutual interference while ensuring full coverage of the scalp. The tilt angle of the serrated protrusions is designed to be 5°-10° to simulate the massage force of fingers.

[0020] The integrated circuit design uses a flexible circuit board (FPC) to connect the toothed protrusions to the main board 5: the VCSEL chip 27 in the light-guiding toothed protrusion 1 is connected to the constant current drive module of the main board through the gold fingers on the FPC; the pressure sensor and pump control line of the liquid-guiding toothed protrusion 12 are integrated into the same FPC, reducing the number of solder joints and improving reliability.

[0021] VCSELs offer 3-5 times higher light power density than LEDs. Combined with lens focusing, the effective light intensity in the dermis increases to over 2.5 times that of traditional products, shortening treatment cycles. The balanced weight design of the inner and outer rings ensures a center of gravity shift of ≤5g·cm, reducing grip force by 30%, making it suitable for extended use of 30 minutes or more per session. The contact failure rate between the FPC and magnetic electrical connection is <0.5%, and the IPX6 waterproof rating meets daily cleaning needs, extending its lifespan to over 5000 charge-discharge cycles.

[0022] The waterproof sealing technology uses double O-rings (silicone material) at the connection between the toothed protrusions and the comb body, combined with UV adhesive curing, to achieve an IPX6 waterproof rating; the main board of the module has a nano-coating (such as Parylene) in 5 areas to prevent liquid penetration and short circuits; the charging interface uses magnetic waterproof contacts that automatically align during charging and automatically close the contact cover after disconnection.

[0023] Each light-guiding tooth-shaped protrusion 1 has at least one light-guiding hole, and each light-guiding hole corresponds to a vertical cavity surface-emitting laser to improve the laser output power of a single tooth-shaped protrusion. Two to three light-guiding holes (spacing 1.5-2mm) are arranged side by side in a single light-guiding tooth-shaped protrusion 1, and a VCSEL chip 27 (power 5-10mW) is integrated in each hole to form a linear beam array (beam spacing 3-5mm).

[0024] Each VCSEL chip 27 can be turned on individually or simultaneously via an independent constant current source (such as TI's TPS61165), and the "single-point enhancement" or "area coverage" mode can be switched by button combination.

[0025] The above structure achieves efficient synergy between light guiding and fluid guiding functions, taking into account both treatment effectiveness and user experience, and is suitable for scenarios such as hair loss prevention, hair follicle activation, and transdermal drug absorption.

[0026] In this embodiment, the light-guiding tooth-shaped protrusion 1 is electrically connected to the module motherboard 5. The light-guiding tooth-shaped protrusion 1 uses silicone as a base, with a metal portion embedded within the silicone base, and the top of the metal portion protruding from the silicone base to form a conductive contact surface for contacting the scalp. The light-guiding tooth-shaped protrusion 1 is made of silicone and metal, with the scalp-contacting portion being metal, used to generate microcurrents. The main body of the light-guiding tooth-shaped protrusion 1 is medical-grade silicone (e.g., Shore hardness 40-60A), possessing both elasticity and insulation. A 0.3-0.5mm thick stainless steel or titanium alloy sheet (silver-plated to enhance conductivity) is embedded at the end of the tooth-shaped protrusion in contact with the scalp, with the metal sheet area accounting for 60%-80% of the cross-section of the tooth-shaped protrusion end. The metal sheet is connected to the EMS drive circuit of the module motherboard 5 via a flexible wire. When the tooth-shaped protrusion contacts the scalp, the metal sheet acts as an electrode, forming a current loop and outputting a 50-200μA microcurrent to stimulate the dilation of capillaries around the hair follicles, enhancing nutrient absorption.

[0027] The light-guiding tooth-shaped protrusion 1 is manufactured using a two-color injection molding process. First, a silicone base (with a pre-reserved metal insert groove) is injection molded. Then, a pre-formed metal sheet (such as a rectangular thin sheet) is embedded into the groove and fixed by a second injection molding. The top of the metal sheet extends 0.1-0.2mm beyond the silicone surface to ensure direct contact with the scalp. A 0.1mm thick insulating layer (such as PET film) is placed between the metal sheet and the silicone base to prevent current leakage. The edges of the metal sheet are rounded (R0.2mm) to avoid scratching the scalp.

[0028] In this embodiment, the main module 100 further includes a main housing, a main control motherboard 17, and a pogopin terminal female connector 16 disposed on the main control motherboard 17. A receiving groove 202 is disposed on the lower surface of the main housing. The main housing has a second mounting cavity, and the second mounting cavity is partially disposed corresponding to the receiving groove 202. The main control motherboard 17 and the pogopin terminal female connector 16 are disposed within the second mounting cavity. The receiving groove 202 is provided with a space for the pogopin terminal female connector 16 to engage with… The functional toothed protrusion module 200 has a through-hole through which one end is electrically connected. The functional toothed protrusion module 200 also includes a pogopin male connector 160 disposed on the module motherboard 5 and electrically connected to the pogopin female connector 16. When the functional toothed protrusion module 200 is installed in the receiving groove 202, it is electrically connected to the main module 100 via the pogopin female connector 16 and the pogopin male connector 160. Through the precise correspondence between the pogopin female connector 16 and the pogopin male connector 160, stable and efficient current and signal transmission between the functional toothed protrusion module 200 and the main module 100 is achieved. This modular and detachable design greatly improves the product's ease of use and maintainability. This design also facilitates product upgrades and iterations. Manufacturers can develop new functional toothed protrusion modules 200 for different hair growth technologies and needs. Users only need to purchase new modules to experience new functions, which extends the service life of the main module 100, enhances the product's market competitiveness, and effectively reduces resource waste.

[0029] The main housing includes a second upper housing 20 and a second lower housing 11, which are detachably connected. This facilitates the inspection, upgrading, or replacement of the main control motherboard 17, pogopin terminal block 16, and other core electronic components inside the main module 100. For example, when the main control motherboard 17 experiences a program malfunction or requires a firmware update, the user or maintenance personnel can disassemble the second upper housing 20 and the second lower housing 11 to directly operate the main control motherboard 17. If the pogopin terminal block 16 experiences poor contact due to prolonged insertion and removal, this component can be replaced individually without replacing the entire main module 100, thereby effectively reducing maintenance costs and resource waste. The detachable connection between the second upper housing 20 and the second lower housing 11 can adopt a snap-fit ​​structure similar to the functional toothed protrusion module 200. For example, a snap-fit ​​interface can be provided on the inner surface of the side wall of the second upper housing 20, and a snap-fit ​​block can be provided at the corresponding position of the second lower housing 11 to achieve quick disassembly and assembly without tools; or a screw connection can be used, which is fixed through a hidden screw hole, taking into account both the stability of the connection and the neatness of the appearance. Preferably, a snap-fit ​​interface is provided on the inner surface of the side wall of the second upper housing 20, and a snap-fit ​​block is provided at the corresponding position of the second lower housing 11.

[0030] In this embodiment, the main body module 100 is arranged in a flat rectangular parallelepiped shape, having a handle portion 101 and a main body portion 102. The diameter of the main body portion 102 is larger than the diameter of the handle portion 101. The handle portion 101 and the main body portion 102 are connected to form a second mounting cavity. This makes the comb as a whole have a teardrop-shaped cross-section. The outer side of the handle portion 101 is provided with silicone anti-slip texture, so that the palm fits the curvature of the comb back when held.

[0031] The main module 100 also includes indicator lights 19, a battery 23, a charging board 24, and at least one control button 18, all disposed in the second mounting cavity and electrically connected to the main control motherboard 17. The charging board 24 is disposed in the second mounting cavity and near the tail of the handheld part 101. The battery 23 is installed in the second mounting cavity and located inside the handheld part 101. The indicator lights 19 and the at least one control button 18 are installed on the upper surface of the main body 102. The receiving groove 202 is disposed on the lower surface of the main body 102, opposite to the upper surface of the main body 102. This structural layout allows for full and rational utilization of the internal space of the hair growth instrument, with each component arranged compactly and orderly. The battery 23 is located inside the handheld part 101, ensuring a balanced center of gravity when holding the instrument, avoiding a top-heavy feel, and providing stable and long-lasting power support for the entire hair growth instrument. The charging board 24 is located near the rear of the handheld part 101, allowing users to easily connect the charging cable when needed without interfering with the grip. The charging board 24 uses a commercially available Type-C board for user convenience. Indicator lights 19 and control buttons 18 are mounted on the upper surface of the main body 102. Users can visually observe the status of the indicator lights 19 to understand the working mode and battery level of the hair growth instrument, and conveniently switch functions and control operations via the control buttons 18, enhancing the overall human-computer interaction experience. The receiving slot 202 is located on the lower surface of the main body 102, corresponding to the mounting position of the functional toothed protrusion module 200. This allows the functional toothed protrusion module 200 to be securely mounted on the main body module 100, and a reliable electrical connection is achieved through the cooperation of the pogopin terminal female and male connectors, ensuring smooth signal and power transmission between the functional toothed protrusion module 200 and the main body module 100.

[0032] The control buttons 18 include function buttons 21 and an confirmation button 22. Function buttons 21 include a liquid delivery button; pressing the liquid delivery button triggers a quantitative drug delivery, allowing the drug solution to penetrate the phototherapy area and enhancing skin permeability through the photothermal effect. The phototherapy + drug delivery simultaneous mode activates VCSEL (power 5~10mW) and EMS microcurrent (intensity 50~200μA) by default upon power-on. The function buttons may also include EMS buttons, phototherapy buttons, etc., which can be customized according to user needs.

[0033] In this embodiment, the number of light-guiding tooth-shaped protrusions 1 is greater than the number of liquid-guiding tooth-shaped protrusions 12. The light-guiding tooth-shaped protrusions 1 are distributed on the outer periphery of the upper surface of the main body of the functional tooth-shaped protrusion module, and the liquid-guiding tooth-shaped protrusions 12 are distributed on the inner ring of the main body of the functional tooth-shaped protrusion module. Specifically, by distributing the more numerous light-guiding tooth-shaped protrusions 1 on the periphery and concentrating the liquid-guiding tooth-shaped protrusions 12 on the inner ring, the grip feel is improved through weight distribution balance. Preferably, the number of liquid-guiding tooth-shaped protrusions 12 is less than the number of light-guiding tooth-shaped protrusions 1 (e.g., a ratio of 1:2 to 1:3), and they are concentrated in the inner ring of the comb (near the central axis area), forming a ring-shaped light-guiding + central liquid-guiding layout. For example, the outer periphery of the comb has 12 light-guiding tooth-shaped protrusions 1, and the inner ring has four liquid-guiding tooth-shaped protrusions 12, arranged in a symmetrical array. The laser irradiation area of ​​the light-guiding tooth-shaped protrusions 1 covers more than 80% of the entire scalp treatment area, while the liquid-guiding tooth-shaped protrusions 12 correspond to areas with dense hair follicles (such as the crown whorl), achieving a synergistic effect of "large-area phototherapy + precise drug delivery." This allows the outer light-guiding tooth-shaped protrusions 1 to contact and cover a larger area of ​​the scalp during hair combing, achieving uniform phototherapy irradiation. Meanwhile, the inner liquid-guiding tooth-shaped protrusions 12 can precisely deliver liquids such as hair growth serum to key areas of the scalp during phototherapy. The synergistic effect of both enhances the hair growth treatment. Simultaneously, this layout conforms to ergonomic principles. When the user holds the main module 100's handheld part 101 for combing, the comb's overall center of gravity is more balanced, preventing it from tilting to one side due to uneven tooth distribution, thus reducing hand fatigue during prolonged use.

[0034] In this embodiment, the functional toothed protrusion module 200 further includes a pressure sensor and a control module electrically connected to the main board 5. The pressure sensor is disposed on the metal portion of the light-guiding toothed protrusion 1 and is used to detect the contact pressure between the light-guiding toothed protrusion 1 and the scalp. The control module is electrically connected to the pressure sensor and the vertical-cavity surface-emitting laser (VCSEL) and is used to adjust the output power of the VCSEL according to the contact pressure. When the contact pressure is greater than a first preset threshold, the output power of the VCSEL is increased; when the contact pressure is less than a second preset threshold, the output power of the VCSEL is decreased, wherein the first preset threshold is greater than the second preset threshold. This configuration of pressure sensor and control module adjusts the VCSEL output power according to the contact pressure.

[0035] A thin-film pressure sensor (0.1 mm thick) is attached to the metal contact surface of the light-guiding toothed protrusion 1. The sensor sensing area overlaps with the metal sheet to detect the pressure (range 0-1 N) of the toothed protrusion on the scalp in real time.

[0036] The control module (MCU) presets a first threshold of 0.6N and a second threshold of 0.2N. When the pressure is greater than 0.6N, the VCSEL drive current is increased from 50mA to 80mA (the power increases from 5mW to 8mW accordingly); when the pressure is less than 0.2N, the current is reduced to 30mA (power 3mW) to avoid energy waste when the pressure is insufficient or the risk of burns when the pressure is too high.

[0037] In this embodiment, the functional toothed protrusion module 200 further includes a skin resistance sensor and an EMS control module. The skin resistance sensor is disposed on the metal part of the light-guiding toothed protrusion 1 and is used to detect the skin resistance of the scalp. The EMS control module is electrically connected to the skin resistance sensor and the metal part of the light-guiding toothed protrusion 1, and is used to adjust the output intensity of the microcurrent according to the skin resistance. When the skin resistance is greater than a preset resistance value, the output intensity of the microcurrent is increased; when the skin resistance is less than the preset resistance value, the output intensity of the microcurrent is decreased. The module motherboard 5 integrates a VCSEL driving circuit, a micro air pump 10 control circuit, and an EMS current output circuit to achieve coordinated control of the three major functions of "light guiding, liquid guiding, and EMS".

[0038] The mainboard 5 is the "brain" of the hair growth instrument. It establishes an electrical connection with the control button 18 (including function buttons and indicator lights 19) and the battery 23 through the pogopin terminal, obtains power, and receives user commands (such as "turn on phototherapy" and "start the fluid infusion").

[0039] The VCSEL drive circuit is electrically connected to the VCSEL inside the light guide tooth protrusion 1. When the user presses the "phototherapy button", the drive circuit sends a start signal to the VCSEL, and the VCSEL emits laser vertically (the light output direction is consistent with the axis of the light guide hole). After the laser is emitted from the light guide hole, it directly irradiates the scalp. At the same time, the module motherboard 5 can adjust the VCSEL power according to the contact pressure detected by the pressure sensor (installed on the metal end of the light guide tooth protrusion 1) (such as increasing the power when the pressure is greater than the preset threshold and decreasing the power when the pressure is less) to ensure the phototherapy effect and safety.

[0040] The control circuit of the micro air pump 10 is electrically connected to the micro air pump 10. When the user presses the "liquid delivery button", the control circuit sends a pressurization signal to the micro air pump 10, which starts and pressurizes the inside of the liquid storage tank 303 (pressure range 0.1-0.3MPa). Under pressure, the liquid in the liquid storage tank 303 flows out through the liquid delivery channel from the liquid outlet of the liquid delivery toothed protrusion 12. The main board 5 can also adjust the pressurization intensity according to the scalp humidity detected by the humidity sensor (installed at the liquid outlet of the liquid delivery toothed protrusion 12) (e.g., increase the pressure and increase the liquid output when the humidity is low). The liquid delivery function pressurizes the liquid storage tank 303 through the micro air pump 10, causing the liquid to flow out from the liquid outlet of the liquid delivery toothed protrusion 12, realizing the precise delivery of drugs / nutrients (solving the problem of "uneven liquid output" in existing liquid delivery products). A sealing sleeve 9 is provided at the connection between the micro air pump and the liquid storage tank 303.

[0041] The EMS current output circuit is electrically connected to the metal end of the light guide tooth-shaped protrusion 1. When the user presses the "EMS button", the circuit delivers the low-voltage current (1-5mA) of the battery 23 to the metal end. When the metal end contacts the scalp, a closed circuit is formed, generating a microcurrent to stimulate blood circulation in the scalp. The main board 5 of the module can adjust the current intensity according to the resistance value detected by the skin resistance sensor (installed on the metal end) (e.g., increase the current when the resistance is high and decrease the current when the resistance is low) to avoid discomfort caused by excessive current.

[0042] In some embodiments, a skin resistance sensor and an EMS control module are also included. The skin resistance sensor is disposed on the metal portion of the light guide tooth-shaped protrusion 1 and is used to detect the skin resistance of the scalp. The EMS control module is electrically connected to the skin resistance sensor and the metal portion of the light guide tooth-shaped protrusion 1 and is used to adjust the output intensity of the microcurrent according to the skin resistance. When the skin resistance is greater than a preset resistance value, the output intensity of the microcurrent is increased; when the skin resistance is less than the preset resistance value, the output intensity of the microcurrent is decreased. The metal contact end of the EMS function light guide tooth-shaped protrusion 1 serves as the conduction medium for the EMS current. The module motherboard 5 obtains a low-voltage current (1-5mA) from the battery 23 through the pogopin terminal. When the metal end contacts the scalp, a closed circuit is formed, generating a microcurrent to stimulate scalp blood circulation and enhance the absorption effect of phototherapy and nutrients by hair follicles.

[0043] By detecting scalp resistance (indirectly reflecting skin moisture) using a skin resistance sensor and adjusting the microcurrent intensity using an EMS control module, "personalized EMS stimulation" can be achieved.

[0044] The skin resistance sensor is mounted on the metal contact end of the light guide tooth-shaped protrusion 1 (the side that directly contacts the scalp). Its working principle is: the higher the skin humidity, the lower the resistance value; the lower the skin humidity, the higher the resistance value. The EMS control module is integrated on the module motherboard 5 and is electrically connected to the sensor and the metal end.

[0045] When the user activates the EMS function, the sensor collects the scalp's resistance signal in real time and transmits it to the control module. The control module analyzes the signal; if the resistance value is greater than a preset threshold (e.g., 100kΩ, indicating a dry scalp), the EMS current intensity is increased (e.g., from 1mA to 5mA) to enhance scalp stimulation; if the resistance value is less than the preset threshold (e.g., 50kΩ, indicating a moist scalp), the current intensity is decreased (e.g., from 5mA to 1mA) to avoid excessive current causing stinging. This intelligent adjustment ensures that EMS stimulation is both effective and safe, improving the user experience.

[0046] In this embodiment, the liquid storage and supply module 300 includes a micro air pump 10 and a liquid storage tank 303. The liquid storage chamber is the cavity of the liquid storage tank 303. The liquid in the liquid storage chamber is pressurized by the micro air pump 10, causing the liquid in the liquid storage chamber to flow out from the liquid guiding channel of the liquid guiding tooth-shaped protrusion 12. The micro air pump 10 uses a piezoelectric ceramic pump or a peristaltic pump to drive the flow of the medicine liquid, and the pump body accuracy reaches micro-level. The air pump is controlled by the MCU of the module motherboard 5. Each time the liquid guiding button is pressed, the air pump starts and pressurizes for 0.5-1 seconds, driving a quantitative amount of medicine liquid (0.1-0.3mL) to flow out. The liquid storage tank 303 is cylindrical (diameter 20-25mm) and is vertically installed on the central axis of the hair growth instrument. Four liquid guiding tooth-shaped protrusions 12 are distributed around the liquid storage tank 303 at 90° intervals.

[0047] The liquid storage tank 303 (capacity 5-10mL) is made of medical-grade PP material and has a built-in flexible diaphragm. The micro air pump 10 (volume ≤10mm×10mm×5mm) is connected to the top of the liquid storage tank 303 through an air guide tube. When the air pump is working, it injects air into the tank, causing the diaphragm to squeeze the liquid.

[0048] In this embodiment, the liquid storage tank 303 includes an upper shell 13, a lower shell 7, and a sealing cap 14. The lower shell 7 has an insertion hole for installing the guide tooth protrusion 12. The liquid inlet 302 is located at the bottom of the upper shell 13. The sealing cap 14 is detachable and closes to the liquid inlet 302. A liquid storage tank sealing ring 8 is provided between the upper shell 13 and the lower shell 7 to prevent liquid leakage from the liquid storage tank 303. A silicone flexible tube (0.8mm inner diameter) guide tube 122 is provided at the insertion hole. The tube has a built-in one-way valve to prevent backflow of the liquid. The guide tooth protrusion 12 is inserted into the guide tube 122. The sealing cap 14 is made of silicone and is screwed into the liquid inlet 302. After tightening, the silicone lip of the sealing cap 14 fits tightly against the inner wall of the liquid inlet 302, forming a double sealing structure to further ensure the sealing performance of the liquid storage tank 303.

[0049] At the connection between the upper and lower shells of the liquid storage tank 303, a liquid storage tank sealing ring 8 (made of nitrile rubber) is embedded. When the upper and lower shells are assembled, the sealing ring is compressed to form the first line of sealing to prevent the liquid (such as hair growth essence) in the liquid storage tank 303 from leaking from the connection.

[0050] In this embodiment, the functional toothed protrusion module 200 further includes a humidity sensor and a liquid guiding control module. The humidity sensor is located at the liquid outlet channel of the liquid guiding toothed protrusion 12 and is used to detect the humidity of the scalp. The liquid guiding control module is electrically connected to the humidity sensor and the micro air pump 10, and is used to adjust the pressure intensity of the micro air pump 10 according to the scalp humidity. When the scalp humidity is lower than a preset humidity value, the pressure intensity of the micro air pump 10 is increased to increase the liquid guiding volume; when the scalp humidity is higher than the preset humidity value, the pressure intensity of the micro air pump 10 is decreased to reduce the liquid guiding volume. By setting the humidity sensor and the liquid guiding control module, the pressure intensity of the micro air pump 10 is adjusted according to the scalp humidity.

[0051] A capacitive humidity sensor (accuracy ±5%RH) is integrated next to the 12 liquid outlet holes of the serrated protrusion. When the sensor probe comes into contact with the scalp, it determines the humidity by detecting the moisture content on the skin surface.

[0052] The preset humidity threshold is 60%RH. When the detected value is <50%, the air pump pressurizes to 10kPa (standard pressure 5kPa), and the liquid delivery volume increases by 50%. When the detected value is >70%, the pressure is reduced to 3kPa, and the liquid delivery volume decreases by 30% to avoid liquid accumulation or insufficiency.

[0053] In some embodiments, the toothed protrusion structure is rotatably configured relative to the main body of the beauty device to adapt to the beauty needs of different parts of the body.

[0054] The toothed protrusions can be rotated relative to the main body of the beauty device to adapt to the beauty needs of different areas.

[0055] The toothed protrusion module is connected to the main body via a central rotating shaft (a stainless steel shaft with a diameter of 2-3 mm). A torsion spring (torque 0.05-0.1 N·m) is fitted around the outer circumference of the rotating shaft, allowing the toothed protrusion module to rotate adaptively within a range of ±15°.

[0056] The end of the rotating shaft is provided with an annular groove, and the corresponding position inside the main body is provided with an elastic locking protrusion. When the toothed protrusion module rotates to a preset angle (such as 0°, 10°, 20°), the protrusion is locked into the groove to meet the care needs of different angles such as the top of the head and sideburns.

[0057] In some embodiments, this embodiment builds upon existing light-guiding / fluid-guiding functions by using camera 4 (camera 4 on the module shell in the existing architecture) to capture scalp images, identifying hair follicle status (such as the proportion of resting hair follicles and the amount of sebum secreted around the hair follicles) through a CNN image recognition model, and combining data from pressure sensors (contact pressure) and humidity sensors (scalp humidity), assigning weights to each data point through an attention mechanism multimodal fusion algorithm, and outputting personalized VCSEL power, fluid-guiding volume, and EMS current to achieve precise matching of "hair follicle status - functional parameters".

[0058] Hair follicle status recognition: Camera 4 captures a scalp image (200x200 pixels resolution) every 10 seconds. The CNN model is trained (using a labeled image dataset containing resting hair follicles, anagen hair follicles, and sebum secretion) to recognize the status of hair follicles and outputs the proportion of resting hair follicles (e.g., 35%) and the level of sebum secretion (e.g., "medium").

[0059] Multimodal fusion: The attention mechanism model fuses the follicle state data output by the CNN (weight 0.5), the contact pressure of the pressure sensor (e.g., 2N, weight 0.3), and the scalp humidity of the humidity sensor (e.g., 55%, weight 0.2). For example, when the proportion of resting follicles is high (40%), the pressure is moderate (2N), and the humidity is normal (50%), the model assigns a higher weight to the follicle state, outputs a VCSEL power of 60mW (enhancing phototherapy to activate follicles), a fluid infusion rate of 0.6ml / min (supplementing nutrients), and an EMS current of 0.8mA (mild stimulation); when the sebum secretion level is high ("high"), the pressure is high (3N), and the humidity is high (65%), the model assigns a higher weight to sebum and humidity, outputs a VCSEL power of 30mW (reducing sebum's obstruction of light), a fluid infusion rate of 0.3ml / min (avoiding increased sebum), and an EMS current of 1.2mA (promoting sebum metabolism).

[0060] Cloud-based optimization: The device uploads images, sensor data, and output parameters from each use to the cloud. Through big data analysis, the CNN model (such as adding scalp image data of different ethnicities and different types of hair loss) and attention mechanism weights (such as adjusting the weight of hair follicle status to 0.6 to improve accuracy) are optimized to improve the accuracy of subsequent uses.

[0061] By using image recognition and multimodal fusion, precise control of hair follicle status is achieved, overcoming the limitations of existing technologies that rely solely on sensor data. This allows functional parameters to be deeply matched with hair follicle status (e.g., enhancing phototherapy when the proportion of resting hair follicles is high, and reducing fluid infusion when sebum secretion is high). The hair loss prevention and hair growth effect is improved by 30%-35% compared to existing technologies (e.g., after 3 months of use, the proportion of resting hair follicles decreases by 15%-20%).

[0062] In this embodiment, the functional toothed protrusion module 200 also includes a decorative shell 2, which is disposed on the surface of the first upper shell 3 and fitted onto the light-guiding toothed protrusion 1 and the liquid-guiding toothed protrusion 12; the main module 100 also includes a main decorative shell 25 and a tail cap 26, which is disposed on the second upper shell and located on one side of the control button, and the tail cap 26 is disposed at the tail of the handheld part 101, so that the overall appearance of the toothed protrusion structure is more regular and uniform, and the aesthetics of the product are improved.

[0063] It should be understood that the application of the present invention is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A modularly designed hair growth instrument, characterized in that, include The main module has a power supply system; A functional toothed protrusion module is detachably electrically connected to the main module, and the functional toothed protrusion module includes a liquid-guiding toothed protrusion with a liquid-guiding channel; as well as A liquid storage and supply module has a liquid storage chamber, which is used by the user to add liquid to the liquid storage chamber and a liquid inlet communicating with the liquid storage chamber. The liquid storage and supply module is installed between the main body module and the toothed protrusion module. The toothed protrusion is connected to the liquid storage chamber. When the toothed protrusion module is detached from the main body module, the user can add liquid to the liquid storage chamber.

2. The modularly designed hair growth instrument as described in claim 1, characterized in that, The functional toothed protrusion module includes a first upper shell, a first lower shell, and a first mounting cavity. The first upper shell and the first lower shell are detachably covered, and after being covered by each other, they form the first mounting cavity. The bottom wall of the first lower shell is provided with a first opening. The liquid storage and supply module is disposed in the first mounting cavity, and the liquid storage and supply module is provided with a liquid inlet corresponding to the first opening. The inner surface of the side wall of the first upper shell is provided with a snap-fit ​​interface around its perimeter, and the inner surface of the side wall of the first lower shell is provided with a snap-fit ​​block corresponding to the snap-fit ​​interface around its perimeter. The first upper shell is detachably connected through the snap-fit ​​interface and the snap-fit ​​block.

3. The modularly designed hair growth instrument as described in claim 2, characterized in that, The outer surface of the main module is provided with a receiving groove for fitting the functional toothed protrusion module. A magnetic suction member is provided inside the main module and below the receiving groove. The functional toothed protrusion module is provided with an attachment magnetic suction member. When the functional toothed protrusion module is installed in the receiving groove, the functional toothed protrusion module is fixed in the receiving groove by the mutual attraction of the magnetic suction member and the attachment magnetic suction member.

4. The modularly designed hair growth instrument as described in claim 3, characterized in that, The bottom outer surface of the first lower housing is coated with metallic paint, the metallic paint being the attachment magnetic element, and the magnetic element being a magnetic block; or both the attachment magnetic element and the magnetic element are magnetic blocks, the attachment magnetic element being disposed in the first mounting cavity and corresponding to the magnetic element.

5. The modularly configured hair regrowth instrument as described in claim 1, characterized in that, The functional toothed protrusion module also includes a light-guiding toothed protrusion and a module main board. The light-guiding toothed protrusion has a light-guiding hole. The module main board is electrically connected to a vertical cavity surface-emitting laser. The light-guiding toothed protrusion covers the vertical cavity surface-emitting laser so that the light emitted by the vertical cavity surface-emitting laser is emitted through the light-guiding hole of the light-guiding toothed protrusion. The light-guiding tooth-shaped protrusion is electrically connected to the module motherboard, and the light-guiding tooth-shaped protrusion is based on silicone, with the metal part embedded in the silicone base, and the top of the metal part protruding from the silicone base, forming a conductive contact surface that contacts the scalp.

6. The modularly configured hair regrowth instrument as described in claim 5, characterized in that, The main module further includes a main housing, a main control motherboard, and a pogopin terminal female socket disposed on the main control motherboard. The main housing has a second mounting cavity, in which the main control motherboard and the pogopin terminal female socket are disposed. The side of the main housing facing the functional toothed protrusion module has a through hole through which one end of the pogopin terminal female socket can be electrically connected to the functional toothed protrusion module. The functional toothed protrusion module also includes a pogopin terminal male socket disposed on the module motherboard and electrically connected to the pogopin terminal female socket. The functional toothed protrusion module is electrically connected to the main module through the pogopin terminal female socket and the pogopin terminal male socket.

7. The modularly configured hair regrowth instrument as described in claim 5, characterized in that, The number of light-guiding tooth-shaped protrusions is greater than the number of liquid-guiding tooth-shaped protrusions. The light-guiding tooth-shaped protrusions are distributed on the outer periphery of the upper surface of the main body of the functional tooth-shaped protrusion module, and the liquid-guiding tooth-shaped protrusions are distributed on the inner ring of the upper surface of the main body of the functional tooth-shaped protrusion module.

8. The modularly configured hair regrowth instrument as described in claim 5, characterized in that, The functional toothed protrusion module also includes a pressure sensor and a control module electrically connected to the main board of the module. The pressure sensor is disposed on the metal part of the light-guiding toothed protrusion and is used to detect the contact pressure between the light-guiding toothed protrusion and the scalp. The control module is electrically connected to the pressure sensor and the vertical-cavity surface-emitting laser (VCSEL) and is used to adjust the output power of the VCSEL according to the contact pressure. When the contact pressure is greater than a first preset threshold, the output power of the VCSEL is increased; when the contact pressure is less than a second preset threshold, the output power of the VCSEL is decreased, wherein the first preset threshold is greater than the second preset threshold. The functional toothed protrusion module also includes a skin resistance sensor and an EMS control module. The skin resistance sensor is disposed on the metal part of the light-guiding toothed protrusion and is used to detect the skin resistance of the scalp. The EMS control module is electrically connected to the skin resistance sensor and the metal part of the light-guiding toothed protrusion and is used to adjust the output intensity of the microcurrent according to the skin resistance. When the skin resistance is greater than a preset resistance value, the output intensity of the microcurrent is increased; when the skin resistance is less than the preset resistance value, the output intensity of the microcurrent is decreased.

9. The modularly configured hair growth instrument as described in claim 1, characterized in that, The liquid storage and supply module includes a micro air pump and a liquid storage tank. The liquid storage chamber is the cavity of the liquid storage tank. The liquid in the liquid storage chamber is pressurized by the micro air pump, so that the liquid in the liquid storage chamber flows out from the liquid guiding channel with the tooth-shaped protrusion. The liquid storage tank includes an upper shell, a lower shell, and a sealing cap. The lower shell has an insertion hole for mounting the toothed protrusion. The liquid inlet is located at the bottom of the upper shell. The sealing cap is detachable and seals the liquid inlet. A sealing ring is provided between the upper and lower shells to prevent liquid leakage from the storage tank.

10. The modularly configured hair growth instrument as described in claim 9, characterized in that, The functional toothed protrusion module also includes a humidity sensor and a liquid guiding control module. The humidity sensor is located at the liquid outlet channel of the liquid guiding toothed protrusion and is used to detect the humidity of the scalp. The liquid guiding control module is electrically connected to the humidity sensor and the micro air pump and is used to adjust the pressure intensity of the micro air pump according to the scalp humidity. When the scalp humidity is lower than the preset humidity value, the pressure intensity of the micro air pump is increased to increase the liquid guiding volume. When the scalp humidity is higher than the preset humidity value, the pressure intensity of the micro air pump is decreased to reduce the liquid guiding volume.

Images