Contact head, waterproof shell and beautifying device

Abstract

The invention relates to the technical field of beauty equipment, and discloses a contact head, a waterproof shell and a beauty device. The contact head is arranged on a preset beauty instrument main body; comprising a sapphire glass body, an EMS electrode is arranged on the sapphire glass body; a VCSEL laser light source is arranged in the contact head, and the light emitting position of the VCSEL laser light source is arranged to avoid the EMS electrode. The waterproof shell comprises a main body lower shell, a head lining plate, a head lower shell and a main body upper shell, and the main body lower shell, the head lining plate, the head lower shell and the main body upper shell define a closed cavity through a buckle structure; and a sealing ring is embedded in a gap of the buckle structure to form a sealing barrier. The beauty device comprises a beauty instrument main body, the contact head provided by any embodiment of the application and the waterproof shell provided by any embodiment of the application.

Description

Technical Field

[0001] This application relates to the field of beauty equipment technology, and in particular to a contact head, a waterproof housing, and a beauty device. Background Technology

[0002] Current beauty device technology suffers from the following critical issues that urgently need to be addressed, limiting product safety, effectiveness, and user experience: 1. Safety Hazards: The existing beauty devices have insufficient sealing design for the battery and motherboard PCB cavity (such as batteries being placed haphazardly or not properly sealed). When the beauty device is used with liquids such as nourishing essences or face masks, the liquid can easily seep into the internal cavity through the gaps in the outer shell, causing battery short circuits, product damage, or even electric shock and other safety accidents.

[0003] 2. Poor light effect: The contact heads of existing light beauty devices are mostly made of metal or plastic, which have poor light transmittance, resulting in severe light scattering and inability to effectively penetrate into the dermis layer of the skin; even if a laser light source is used, the light energy utilization rate is low due to the limitations of the contact head material, making it difficult to achieve the ideal anti-aging and repair effects.

[0004] Therefore, a structure is urgently needed to solve at least one of the above problems. Summary of the Invention

[0005] This application provides a contact head, a waterproof housing, and a beauty device, aiming to solve the defects of some rotatable beauty devices, such as safety hazards and poor lighting effects, although they have angle adjustment functions.

[0006] In a first aspect, this application provides a contact head disposed on a preset beauty device body; including a sapphire glass body; an EMS electrode disposed on the sapphire glass body; and a VCSEL laser light source disposed inside the contact head, wherein the light emission position of the VCSEL laser light source is disposed away from the EMS electrode.

[0007] In some embodiments, the EMS electrode is fabricated on the sapphire glass body using a DPC metal plating process or a screen printing process, and the EMS electrode is made of an opaque material.

[0008] In some embodiments, the contact head is rotatably configured relative to the main body of the beauty device to adapt to the beauty needs of different parts of the body, and / or, the sapphire glass body adopts a 2.5D glass design and incorporates a chamfered structure.

[0009] Secondly, this application provides a waterproof shell, including a lower main shell, a head liner, a lower head shell, and an upper main shell, wherein the lower main shell, the head liner, the lower head shell, and the upper main shell are arranged to form a sealed cavity by a snap-fit ​​structure; a sealing ring is embedded in the gap of the snap-fit ​​structure to form a sealing barrier.

[0010] In some embodiments, the snap-fit ​​structure includes snap-fit ​​teeth, the hook angle and elastic arm length of which are optimized to ensure that the sealed cavity does not loosen during long-term use.

[0011] In some embodiments, the inner layer of the sealed cavity is provided with a waterproof coating.

[0012] In some embodiments, the magnetic sealing ring and the mating surface at the rotating connection form a double waterproof sealing structure.

[0013] In some embodiments, the sealed cavity is used to house the battery and the motherboard PCB to prevent the beauty solution from coming into contact with the battery and the motherboard PCB.

[0014] Thirdly, this application provides a beauty device, including a beauty instrument body, a contact head provided in any embodiment of this application, and a waterproof housing provided in any embodiment of this application.

[0015] In some embodiments, the beauty device acquires a unique wavelength combination, which is generated based on skin type information and beauty needs information; adjusts the VCSEL laser light source corresponding to the contact head according to the unique wavelength combination to control the output wavelength of the VCSEL laser light source; collects skin reflection light data in real time through a built-in photosensor; and adjusts the output power and wavelength of the VCSEL laser light source according to the skin reflection light data.

[0016] The beauty device provided in this application addresses the core problems of existing technologies, achieving a comprehensive improvement in safety, effectiveness, comfort, and intelligence. Specific beneficial effects include: 1. Ultimate safety protection, eliminating the risk of liquid intrusion: The double-sealed cavity formed by the "main body lower shell + head liner + head lower shell + main body upper shell" (waterproof outer shell + additional sealing of the internal cavity), combined with the buckle structure and sealing ring, forms a tight waterproof barrier, completely preventing the penetration of nutrient essence and mask liquid into the battery and motherboard area, effectively preventing short circuits, damage or safety accidents, and greatly improving product safety.

[0017] 2. High light transmittance contact head, improving light energy utilization: Sapphire glass is used as the contact head material, which has extremely high light transmittance (transmitting more than 90% of visible light and near-infrared light) and stable chemical properties, and does not react with active cosmetics; combined with VCSEL laser light source (vertical cavity surface emission, less scattering, and uniform energy density), most of the light penetrates the contact head to reach the dermis layer of the skin, significantly improving the effects of phototherapy (such as promoting cell metabolism and anti-aging).

[0018] 3. Upgraded EMS electrode technology for optimized user experience: EMS electrodes are fabricated on sapphire glass using DPC metal plating or screen printing processes, resulting in extremely thin electrodes (flush with the substrate surface), completely eliminating the foreign object feeling of existing "overlay processes." Simultaneously, the electrodes seamlessly integrate with the substrate, preventing gel residue in gaps, making cleaning easy and hygienic. Furthermore, the staggered design of the EMS electrodes and VCSEL laser emission positions (light emission avoids the electrodes) solves the light obstruction problem during functional integration, achieving synergistic effects between illumination and EMS functionality.

[0019] 4. Flexible and adaptable design enhances ease of use: The contact head adopts 2.5D glass with a chamfered structure to improve skin adhesion; in some embodiments, the contact head can be rotated to adapt to the curved contours of different parts such as the face, neck, and shoulders, meeting diverse beauty needs; the head cover and the main body adopt a magnetic structure for easy disassembly and assembly, facilitating cleaning or replacement of the contact head; the main body is equipped with a silicone anti-slip pad for a comfortable grip and to prevent slipping during use.

[0020] 5. Intelligent adjustment system for personalized beauty: The beauty device can generate a unique wavelength combination based on the user's skin type (such as sensitive skin or oily skin) and beauty needs (such as spot removal or anti-wrinkle). The corresponding wavelength is adjusted and output through the VCSEL laser light source. At the same time, the built-in photosensitizer collects skin reflection light data in real time and dynamically adjusts the light power and wavelength to achieve "on-demand adjustment" and improve the targeting and accuracy of the beauty effect.

[0021] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the disassembled structure of a beauty device provided in one embodiment of this application; Figure 2 This is a schematic diagram of the first overall structure of the beauty device provided in an embodiment of this application; Figure 3 This is an exploded schematic diagram of a beauty device provided in one embodiment of this application; Figure 4 This is a schematic diagram of the second overall structure of the beauty device provided in one embodiment of this application; Figure 5This is a schematic diagram of the third overall structure of the beauty device provided in one embodiment of this application; Figure 6 This is a schematic block diagram of the structure of a beauty device provided in one embodiment of this application.

[0024] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] The flowchart shown in the attached diagram is for illustrative purposes only and does not necessarily include all content and operations / steps, nor does it necessarily have to be performed in the order described. For example, some operations / steps can be broken down, combined, or partially merged, so the actual execution order may change depending on the actual situation.

[0027] It should be understood that, in order to clearly describe the technical solutions of the embodiments of the present invention, the terms "first" and "second" are used in the embodiments of the present invention to distinguish identical or similar items with essentially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and the terms "first" and "second" are not necessarily different.

[0028] It should be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0029] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0030] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0031] Current beauty device technology suffers from the following critical issues that urgently need to be addressed, limiting product safety, effectiveness, and user experience: Safety hazards: The existing beauty devices have insufficient sealing design for the battery and motherboard PCB cavity (such as batteries being placed haphazardly or not properly sealed). When the beauty device is used with liquids such as nourishing essences and masks, the liquid can easily seep into the internal cavity through the gaps in the outer shell, causing battery short circuits, product damage, or even electric shock and other safety accidents.

[0032] Poor light effects: The contact heads of existing light beauty devices are mostly made of metal or plastic, which have poor light transmittance, resulting in severe light scattering and inability to effectively penetrate into the dermis layer of the skin; even when using laser light sources, the light energy utilization rate is low due to the limitations of the contact head material, making it difficult to achieve the ideal anti-aging and repair effects.

[0033] Poor EMS electrode experience: Most existing EMS beauty devices use "sleeving technology" for their electrodes, which protrude from the surface of the base material, resulting in a noticeable foreign body sensation during use; moreover, the gaps between the electrodes and the base are prone to residue of cosmetics such as gel, which are difficult to clean, affecting hygiene and electrode conductivity.

[0034] Functional integration defects: When the illumination function is integrated with the EMS function, the existing technology has not solved the problem of the electrode blocking the light (the EMS electrode is not transparent), which causes the illumination area to be covered by the electrode, making it impossible to achieve the synergistic effect of the two; at the same time, the contact head is mostly fixed and cannot adapt to the curved contours of different parts such as the face, neck, and shoulders, resulting in poor ease of use.

[0035] Insufficient personalization and intelligence: Most existing beauty devices use fixed wavelengths and power outputs, which cannot adjust light parameters according to the user's skin type (such as sensitive skin, dry skin) and beauty needs (such as spot removal, anti-wrinkle); and lack a real-time feedback mechanism, so they cannot dynamically optimize the light effect according to the skin condition.

[0036] like Figures 1 to 5 As shown, this application provides a contact head disposed on a preset beauty device body; including a sapphire glass body; an EMS electrode disposed on the sapphire glass body; and a VCSEL laser light source disposed inside the contact head, wherein the light emission position of the VCSEL laser light source is disposed away from the EMS electrode.

[0037] The contact head of this application is a key working component of the beauty device, integrating both light-based beauty treatments (red light / laser) and microcurrent beauty treatments (EMS). Its core design concept lies in using sapphire glass as a substrate, due to its high light transmittance, high hardness, and chemical inertness, enabling efficient light energy conduction without reacting with skincare products. EMS electrodes are integrated onto the sapphire glass, and a VCSEL laser light source is built-in to achieve photoelectric synergy. Through special electrode technology and optical layout, as well as a rotatable structural design, the beauty effect, safety, and user experience are enhanced.

[0038] The base material uses sapphire glass as the contact head body, utilizing its high light transmittance (ensuring laser penetration) and chemical stability (not reacting with active cosmetics). An EMS electrode (opaque material) is fabricated on the sapphire glass to transmit microcurrents to muscle tissue. The VCSEL laser source is located inside the contact head, with its light emission position avoiding the EMS electrode (because the electrode is opaque), ensuring that most of the laser light passes through the sapphire glass to reach the dermis. The sapphire glass uses a 2.5D glass design (with rounded edges) and a chamfered structure to enhance the softness and fit of the contact head to the skin, reducing friction. The contact head can be rotated relative to the main body of the beauty device (e.g., connected via a rotating shaft or magnetic structure) to adapt to the beauty needs of different areas such as the face, neck, and eyes.

[0039] The assembly process of the contact head is as follows: the VCSEL laser chip (vertical cavity surface emitter) is fixed on the bracket inside the contact head, and its light emission direction is adjusted to ensure that the light is emitted from the non-electrode area of ​​the sapphire glass; EMS electrodes (conductive materials such as copper and silver) are made in a designated area of ​​the sapphire glass (such as the edge ring area) using DPC metal plating or screen printing; the edge of the sapphire glass is 2.5D polished (the arc is machined using a CNC machine tool, and the chamfer angle is 15°-30°); the contact head is connected to the main body of the beauty device through a rotating structure (such as a rotating shaft with a sealing ring) to ensure smooth rotation and waterproofness.

[0040] In some embodiments, the EMS electrode is fabricated on the sapphire glass body using a DPC metal plating process or a screen printing process, and the EMS electrode is made of an opaque material.

[0041] EMS electrodes are fabricated on a sapphire glass substrate. Two advanced processes can be employed: First, a thin-film process is used to deposit, pattern, and thicken a metal layer on the sapphire surface to form a precise and robust electrode circuit. Second, a conductive paste is screen-printed onto the sapphire surface and then sintered at high temperature to form the electrode. Electrodes formed using this method are almost flush with the substrate surface.

[0042] This design avoids the "foreign body sensation" caused by traditional electrode protrusions, making it more comfortable to the skin. The electrode bonds tightly to the sapphire substrate without gaps, preventing the residue of cosmetic gel and bacterial growth. Both processes ensure excellent adhesion and conductivity stability between the electrode and the substrate.

[0043] This embodiment optimizes the processing technology and material characteristics of EMS electrodes to solve the problem of "electrodes protruding from the substrate and reacting with cosmetics" in the prior art. The specific technical means are as follows: Process selection: EMS electrodes are fabricated on the sapphire glass body through DPC (direct copper plating) metal plating process or screen printing process; DPC process: a seed layer (such as titanium / copper) is deposited on the surface of sapphire glass, and the electrode pattern is formed by photolithography and electroplating, which has high precision (line width ≤50μm) and strong adhesion (not easy to fall off); Screen printing process: conductive paste (such as silver paste) is printed on sapphire glass through screen printing plate, and a firm conductive pattern is formed by high temperature sintering (150-200℃); EMS electrodes are made of opaque materials (such as copper, silver) to avoid blocking VCSEL laser.

[0044] If the DPC process is used: the sapphire glass is cleaned (to remove oil and impurities); a titanium (50nm) + copper (200nm) seed layer is deposited by magnetron sputtering; photoresist is coated, and the electrode pattern (such as a ring electrode) is defined by photolithography; copper is electroplated (1-3μm thick), and then the photoresist and seed layer are removed to form the EMS electrode; If screen printing is used: design a screen printing plate (electrode pattern is circular, line width 1mm); pour conductive silver paste (containing silver powder, resin, and solvent) into the printing plate, and use a squeegee to print the silver paste through the mesh onto the sapphire glass; place the printed sapphire glass in an oven and sinter at 180℃ for 30 minutes to solidify the silver paste into conductive electrodes; the electrodes are flush with the surface of the sapphire glass (thickness ≤5μm), without any foreign object protruding from the substrate, providing a comfortable user experience.

[0045] In some embodiments, the contact head is rotatably configured relative to the main body of the beauty device to adapt to the beauty needs of different parts of the body, and / or, the sapphire glass body adopts a 2.5D glass design and incorporates a chamfered structure.

[0046] Since EMS electrodes (usually metal) are opaque, the light emission position (or light path) of the VCSEL laser source must be set away from the area of ​​the EMS electrodes to ensure that the laser can penetrate the sapphire glass without obstruction and act on the skin.

[0047] The sapphire glass body features a 2.5D glass design (with curved edges) and a chamfered structure. This makes the contact tip's edges smooth and rounded, enhancing its fit to facial curves (such as around the eyes and nose) and providing a soft touch.

[0048] The contact head is connected to the main body of the beauty device using a rotatable structure (such as a ball joint or hinge structure). Users can freely adjust the angle of the contact head according to different beauty areas (such as cheeks, neck, and forehead).

[0049] This embodiment optimizes the adaptability and fit of the contact head, solving the problem of "fixed contact head, unable to adapt to different parts" in the prior art. The specific technical means are as follows: The contact head is connected to the main body of the beauty device via a rotating structure (such as a magnetic rotating shaft or ball joint structure), allowing the contact head to rotate around the main body (rotation angle 0°-90°); the sapphire glass adopts a 2.5D glass design (edge ​​curvature radius R=2-5mm) and is combined with a chamfered structure (chamfer width 0.5-1mm).

[0050] A magnetic swivel is installed on the main body of the beauty device (one end of the swivel is fixed to the main body, and the other end is connected to the contact head through a strong magnet). An O-ring (silicone rubber material) is embedded at the joint between the swivel and the contact head to ensure waterproofing during rotation. The edges of the sapphire glass are contoured and polished using a CNC machine tool to create a smooth arc (with a larger arc on the side in contact with the skin). Then, the chamfered edges are mirror-polished (roughness Ra≤0.2μm) using a polishing machine. The contact head can adjust its angle according to the user's hand movements (e.g., rotating the contact head 45° when targeting wrinkles around the eyes). The 2.5D design increases the contact area between the contact head and the skin by 30%, improving the fit.

[0051] In some embodiments, to address the problem of "poor fit at uneven parts" caused by the existing EMS electrode fixed layout, a contact head structure of flexible array electrode + pressure sensing + intelligent activation is designed. By detecting the skin contact contour in real time, the activation area of ​​the EMS electrode is dynamically adjusted to achieve uniform current distribution in different parts (such as the corner of the eye and the wing of the nose).

[0052] A flexible PCB (FPC) is bonded under the sapphire glass substrate. Sixteen independent EMS electrode units (each unit is 2mm×2mm in size and 0.5mm apart) are integrated on the FPC. The electrodes adopt DPC metal plating process (thickness ≤10μm) to ensure that they are flush with the sapphire surface. A miniature pressure sensor array (resolution 0.1 N / cm²) is placed between the flexible PCB and the sapphire glass to collect pressure distribution data when in contact with the skin. The EMS motherboard is connected to the flexible PCB via pogopins, and each electrode unit corresponds to an independent switching circuit (controlled by a MOSFET).

[0053] When the contact head touches the skin, the pressure sensor array collects pressure distribution data of the contact area in real time (e.g., the pressure distribution at the corner of the eye is "high at the edges and low in the center"). A convolutional neural network (CNN) is used to process the pressure data and identify the contour features of the contact area (e.g., "corner of the eye", "cheek", "forehead"). The model is trained with a large amount of skin pressure distribution data and has an accuracy of ≥95%. Based on the identification results, the algorithm generates an electrode activation strategy (e.g., only the 8 electrode units at the edge of the corner of the eye are activated to avoid current concentration in the central protrusion). The EMS motherboard controls the corresponding MOSFET to turn on according to the strategy, activating only the target electrode units to ensure that the current is applied evenly to the skin and to avoid "foreign body sensation".

[0054] It breaks through the limitations of the existing "fixed electrode layout" and achieves dynamic adaptation of the electrode layout through pressure sensing + flexible array + intelligent activation; it solves the technical problem of "uneven current distribution in concave and convex parts" and improves the effectiveness of EMS function (tests show that the current uniformity in the corner of the eye is 40% higher than that of the existing technology); the algorithm and hardware structure are deeply integrated to realize closed-loop control of "perception-decision-execution", which is a creative combination of "structure + algorithm".

[0055] In some embodiments, to address the problem that existing fixed-wavelength lasers "cannot adapt to different skin conditions," a contact head combining a multi-wavelength VCSEL array, spectral sensing, and machine learning is designed. By detecting the skin absorption spectrum in real time, the laser wavelength combination (such as the power ratio of 650nm / 660nm / 690nm) is dynamically adjusted to optimize the effect on the dermis.

[0056] The contact head is equipped with a three-wavelength VCSEL array (650nm, 660nm, 690nm, with 8 VCSEL chips for each wavelength, arranged in a 2×4 matrix). The chips use vertical cavity surface emission (divergence angle ≤5°) to ensure concentrated light energy. A miniature spectral sensor (detection range 400-800nm, resolution 1nm) is embedded in the edge of the sapphire glass to collect spectral data of light reflected from the skin. The VCSEL driving circuit uses a digital potentiometer to control the output power of each wavelength (adjustment range 0-100mW) and supports independent dimming.

[0057] When the VCSEL laser irradiates the skin, the spectral sensor collects the spectral data of the light reflected from the skin in real time (e.g., the reflectance at 630nm wavelength is 30%, and at 660nm it is 25%). The partial least squares regression (PLSR) algorithm is used to analyze the spectral data and extract the characteristic absorption peaks of the skin (e.g., the characteristic absorption peak of collagen is at 630nm, and that of melanin is at 660nm). The algorithm uses machine learning models (such as random forests) to associate characteristic absorption peaks with skin conditions (such as "collagen loss" and "melanin deposition")—the model is trained on 1000+ sets of skin spectral data; based on the skin condition, the algorithm generates the optimal wavelength ratio (e.g., for "collagen loss", 630nm accounts for 70% of the power and 660nm accounts for 30%; for "melanin deposition", 660nm accounts for 80% and 690nm accounts for 20%). The VCSEL drive circuit adjusts the digital potentiometer proportionally to control the output power of each wavelength, achieving dynamic optimization.

[0058] It breaks through the limitations of existing "fixed wavelength lasers" by using spectral sensing, machine learning, and dynamic dimming to achieve personalized laser wavelength adaptation; it solves the problem of "large differences in the effect of general wavelengths on different skin conditions" (tests show that for skin with collagen loss, this solution improves the dermal layer heating efficiency compared to a fixed 650nm laser); and it achieves closed-loop intelligent control of "light input - skin feedback - light adjustment", which is a creative fusion of "optical technology + intelligent algorithm".

[0059] like Figures 1 to 5 As shown, this application provides a waterproof shell, including a lower main shell, a head liner, a lower head shell, and an upper main shell. The lower main shell, the head liner, the lower head shell, and the upper main shell are connected by a snap-fit ​​structure to form a sealed cavity. A sealing ring is embedded in the gap of the snap-fit ​​structure to form a sealing barrier.

[0060] The waterproof housing of this application aims to provide a highly reliable sealed environment for core electronic components (battery, motherboard PCB) to solve the fundamental problem of liquid infiltration causing short circuits, damage, or even safety accidents. Its core lies in the concept of "double sealing": an independent sealed cavity is constructed inside the outer housing (top shell and main body shell).

[0061] A sealing ring (such as an O-ring) is pre-embedded in the mating gap of the snap-fit ​​structure. When the snap-fit ​​is tightened, the sealing ring is compressed, forming an effective sealing barrier between the mating surfaces of the components to prevent liquid intrusion. The snap-fit ​​structure eliminates the need for screws, simplifying the assembly process and improving production efficiency. The presence of the sealing ring compensates for any microscopic gaps that may exist within the snap-fit ​​structure itself, achieving a reliable static seal.

[0062] The waterproof shell is the internal sealing structure of the beauty device. Its core function is to isolate external liquids from internal circuit components (battery, motherboard PCB). Its structure and design logic are as follows: Composition structure: It consists of four parts: the lower shell of the main body, the head liner, the lower shell of the head, and the upper shell of the main body, which are connected by a snap-fit ​​structure to form a sealed cavity. Double sealing design: First layer: The head shell and the main shell itself have basic waterproof properties (such as IPX5 waterproof design); Second layer: The internal sealed cavity is further sealed by buckles and sealing rings to prevent beauty solution from seeping in through the gaps in the head shell; The sealed cavity is used to house the battery and motherboard PCB, completely avoiding contact between beauty solution and battery (prone to short circuit) and motherboard (prone to corrosion).

[0063] The head liner (PC+ABS material) is fixed to the lower head shell (of the same material) to form a sealed base for the head. The lower main shell (PC material) and the upper main shell (PC material) are connected by a snap-fit ​​structure (the lower main shell has snap-fit ​​teeth, and the upper main shell has corresponding snap-fit ​​grooves). A rectangular sealing ring (silicone rubber material, cross-sectional size 2×2mm) is embedded at the connection between the lower head shell and the upper main shell. Then, the head assembly and the main assembly are snapped together. After assembly, a pressure test is performed on the sealed cavity (0.1MPa air pressure is injected into the cavity, and the cavity is placed in water to observe whether there are bubbles) to ensure no leakage. The battery (lithium-ion battery, packaged in a soft pack) is fixed at the bottom of the sealed cavity, and the main board PCB (FR4 material) is fixed above the battery. The two are connected by a ribbon cable, and the ribbon cable is sealed with heat shrink tubing at the cable hole in the cavity.

[0064] In some embodiments, the snap-fit ​​structure includes snap-fit ​​teeth, the hook angle and elastic arm length of which are optimized to ensure that the sealed cavity does not loosen during long-term use.

[0065] Optimize the key parameters of the snap-fit ​​structure. Specifically, this includes: Hook angle: Design a reasonable hook angle (e.g., 30-45 degrees) to ensure a secure fit and prevent detachment under vibration or slight external force. Elastic arm length and thickness: Optimize the dimensions of the elastic arm to provide sufficient elasticity and holding force during engagement, while minimizing fatigue deformation after long-term use. Ensure the sealed cavity maintains structural stability and sealing integrity throughout the product's lifespan, preventing seal failure due to component loosening.

[0066] This embodiment optimizes the connection reliability of the snap-fit ​​structure, solving the problem of "snap loosening and cavity leakage after long-term use" in the prior art. The specific technical means are: optimizing the barb angle of the snap-fit ​​teeth (designed to be 45°-60°) and the length of the elastic arm (adjusted according to the toughness of the material, such as 8-10mm for PC material); if the barb angle is too small (<45°), it will result in a weak snap-fit, and if it is too large (>60°), it will result in assembly difficulties; if the length of the elastic arm is too short, it will result in easy breakage, and if it is too long, it will result in excessive deformation during snap-fit.

[0067] The snap-fit ​​structure was simulated using finite element analysis (FEA) software (such as ANSYS): material parameters were input (elastic modulus of PC material 2.4 GPa, Poisson's ratio 0.38); the deformation of the elastic arm during the snap-fit ​​process was simulated (deformation ≤ 1.5 mm to avoid breakage); the barb angle was adjusted to 50° and the elastic arm length to 9 mm, and the holding force after snap-fit ​​was verified (≥ 100 N); an injection mold was made according to the optimized parameters (the snap-fit ​​teeth were formed by EDM), and the produced snap-fit ​​assembly underwent tensile testing (the separation force after snap-fit ​​was tested using a tensile testing machine) to ensure that it met the design requirements.

[0068] In some embodiments, the inner layer of the sealed cavity is provided with a waterproof coating.

[0069] A waterproof nano-coating or conformal coating is applied to the inner wall of the sealed cavity (i.e., the inner wall of the space housing the battery and PCB). This coating prevents even trace amounts of moisture from penetrating the first seal from corroding the circuitry. The inner coating provides a final line of defense, significantly enhancing the safety of electronic components. It solves the waterproofing problem of moving parts (rotating connections), ensuring both functionality and protection.

[0070] This embodiment enhances the secondary sealing capability of the sealed cavity (i.e., the supplement after the failure of the first layer of sealing) by using an inner waterproof coating. The specific technical means is to coat the inner wall surface of the sealed cavity with a waterproof coating (such as polytetrafluoroethylene (PTFE) or silicone rubber coating).

[0071] A water-based silicone rubber coating (environmentally friendly and solvent-free) is selected, which has high waterproof performance (contact angle ≥110°), temperature resistance (-40℃ to 150℃), and strong adhesion to PC material. The inner wall of the sealed cavity is surface-treated (oil is removed by wiping with alcohol, and then the surface roughness is increased by plasma treatment). The silicone rubber coating is evenly applied to the inner wall (10-20μm thickness) using a spraying process (spray gun nozzle diameter 0.8mm, pressure 0.3MPa). The cavity is then placed in an oven and baked at 120℃ for 30 minutes to cure the coating. After coating, the waterproof rating of the cavity is improved from IPX5 to IPX7 (can be immersed in 1 meter of water for 30 minutes without leakage).

[0072] In some embodiments, the magnetic sealing ring and the mating surface at the rotating connection form a double waterproof sealing structure.

[0073] In embodiments where the contact head is rotatable, a magnetic sealing ring is provided at the rotatable connection (such as a ball joint). This sealing ring not only provides a seal but may also assist in positioning. Together with the precision-machined mating surfaces, it forms a double waterproof sealing structure.

[0074] This embodiment optimizes the waterproof design at the rotating connection of the contact head, forming a double waterproof sealing structure through the combination of a magnetic sealing ring and a rotating mating surface.

[0075] An annular magnetic sealing ring is set at the rotating connection between the contact head and the main body (such as a magnetic shaft). A strong magnet is embedded in the sealing ring, which is attracted to the magnet on the main body. The sealing ring is made of magnetic silicone rubber (with neodymium iron boron magnetic powder mixed in the silicone rubber). Double sealing structure: First layer: The magnetic sealing ring and the mating surface (plane) of the main body form a surface seal (after the sealing ring is attracted by the magnet, it fits tightly against the surface of the main body); Second layer: A lip seal (fluororubber material) is set at the mating point between the rotating shaft and the contact head to form a shaft seal (preventing liquid from entering along the rotating shaft). The rotating connection has an IPX8 waterproof rating (can be immersed in 2 meters of water for 1 hour without leakage), meeting the needs of beauty devices in humid environments (such as bathrooms).

[0076] In some embodiments, the sealed cavity is used to house the battery and the motherboard PCB to prevent the beauty solution from coming into contact with the battery and the motherboard PCB.

[0077] By clearly defining the sole purpose of this sealed cavity, constructed from a waterproof shell, as housing and isolating core, water-sensitive electrical components such as batteries and the motherboard PCB, the structural design objective clearly defines its direct solution to the technical problem—physically isolating vulnerable circuitry from potentially seeping cosmetic solutions / moisture, fundamentally eliminating the risk of short circuits.

[0078] This embodiment clearly defines the core function of the sealed cavity—to house the battery and the motherboard PCB—directly solving the problem of "batteries being placed arbitrarily and easily coming into contact with liquids" in the prior art.

[0079] The shape of the sealed cavity matches the internal space of the main body of the beauty device (such as a cuboid structure with dimensions of 100×50×20mm). The battery (soft-pack lithium-ion battery with dimensions of 90×45×5mm) is fixed at the bottom of the cavity (fixed by double-sided tape and clips). The main board PCB (with dimensions of 80×40×1.6mm) is fixed above the battery (supported by copper pillars to avoid direct contact with the battery). The ribbon cable (nickel strip) between the battery and the motherboard passes through the cable hole (2mm in diameter) in the cavity, and the cable hole is sealed with heat shrink tubing (with adhesive) (the heat shrink tubing shrinks after heating and tightly wraps the ribbon cable and the cable hole). Even if the beauty solution seeps into the main body through the gaps in the top shell, it will be blocked by the sealed cavity and cannot come into contact with the battery and motherboard PCB, thus avoiding short circuits or safety accidents.

[0080] In some embodiments, to address the problem of "aging not being detected in time" in existing sealing structures, a waterproof housing with humidity sensing, a miniature drying device, and intelligent early warning is designed. By monitoring the humidity of the sealed cavity in real time, it can provide early warning of sealing failure and actively activate the drying function to prevent short circuits.

[0081] The lower and upper shells of the main body are connected by snaps and sealing rings (silicone material, hardness 70A) to form a sealed cavity. A miniature humidity sensor (measurement range 0-100%RH, accuracy ±2%RH) is installed inside the cavity and is fixed on the main board PCB. A miniature heating element (size 10mm×10mm, power ≤0.5W) is installed at the bottom of the cavity to dry the moisture inside the cavity. An LED indicator (red / green dual color) is set on the surface of the upper shell to indicate the sealing status.

[0082] After the beauty device is powered on, the humidity sensor collects the humidity data of the sealed cavity in real time (humidity ≤60%RH under normal conditions); the humidity data is filtered using a sliding window algorithm (window size 10s) to remove instantaneous fluctuations; when the humidity exceeds the warning threshold (70%RH) for 30 consecutive seconds, the algorithm judges "seal failure" (such as aging of the sealing ring or loosening of the buckle), triggering the following actions: the LED indicator turns red, reminding the user to stop using the device and check the seal; the micro heating element is activated (working continuously for 5 minutes) to heat and evaporate the moisture in the cavity with low power (heating temperature ≤40℃, which will not affect battery life); a notification is sent to the user's APP via Bluetooth, prompting "seal aging, please replace the sealing ring".

[0083] In some embodiments, to address the problem of existing snap-fit ​​structures being prone to loosening after long-term use, a waterproof housing with elastic snap-fit, pressure sensing, and intelligent adjustment is designed. By detecting the snap-fit ​​assembly pressure in real time, the snap-fit ​​tightness is dynamically adjusted to ensure a long-term sealing effect.

[0084] The snap-fit ​​teeth of the lower shell of the main body adopt an elastic arm + micro spring structure (spring stiffness 0.5N / mm), and a pressure sensor is set at the end of the elastic arm (measuring range 0-5N, accuracy ±0.1N); a protruding structure is set at the corresponding position of the lower shell of the head. During assembly, the protrusion squeezes the pressure sensor of the elastic arm and compresses the spring; a magnetic sealing ring (magnetic silicone material) is set at the connection between the upper shell of the main body and the lower shell of the head to enhance the sealing effect.

[0085] During assembly, the user fastens the lower shell of the head to the lower shell of the main body. The protruding structure presses against the elastic arm, and the pressure sensor collects the assembly pressure data. The algorithm then compares the collected pressure values ​​with... Optimal threshold (3N±0.5N) The algorithm compares the pressure values ​​(this threshold is determined through extensive assembly testing to ensure a balance between buckle tightness and sealing effect); if the pressure value is lower than the threshold (<2.5N), the algorithm determines that the buckle is loose, triggering the LED indicator to flash (green → yellow) to remind the user to "re-fasten"; if the pressure value is higher than the threshold (>3.5N), the algorithm determines that the assembly is too tight, and notifies the user via the APP to "reduce force to avoid damage to the buckle"; after assembly, the spring provides continuous elasticity (keeping the pressure at around 3N) to ensure that the buckle will not loosen due to long-term use (such as 1000 opening and closing cycles).

[0086] Please refer to Figures 1 to 6 This application provides a beauty device 1000, including a beauty device body 300, a contact head 100 provided in any embodiment of this application, and a waterproof housing 200 provided in any embodiment of this application.

[0087] The beauty device described in this application is a complete product integrating the aforementioned innovative contact head and highly reliable waterproof housing. It not only possesses hardware advantages but also enhances the personalization and precision of beauty results through intelligent control.

[0088] For example, such as Figures 1 to 5 As shown, the provided beauty device includes an upper cover 1, a first strong magnet 2, an inner liner of the upper cover 3, an upper shell of the head 4, sapphire glass 5, EMS electrodes 6, an EMS motherboard 7, a second strong magnet 8, an LED indicator board 9, a head liner 10, a lower shell of the main body 11, a base shell 12, a silicone pad 13, a main shell 14, a data cable interface cover 15 (such as a Type-C cover), a power button 16, a gear button 17, a lower shell of the head 18, a battery 19, a motherboard PCB 20, an upper shell of the main body 21, and a guide buckle 22.

[0089] The beauty device is the complete product form of this application, consisting of a beauty instrument body, a contact head (any embodiment of this application), and a waterproof shell (any embodiment of this application). Its core function is to integrate light-based beauty treatment (VCSEL laser) and EMS electrical stimulation, and to ensure safety through a waterproof design.

[0090] Assemble the waterproof housing (main body lower shell, head liner, head lower shell, main body upper shell) into a sealed cavity using a snap-fit ​​structure, and insert the battery and motherboard PCB; connect the contact head (with EMS electrodes and VCSEL laser) to the main body of the beauty device via a rotating structure (magnetic hinge); install a Type-C charging port (with waterproof plug), function buttons (touch-sensitive, sealed design), and indicator lights (displaying battery level and working mode) on the main body. The motherboard PCB integrates an EMS driver circuit (used to control the micro-current output of the electrodes, with a current range of 0-10mA and a frequency of 1-100Hz), a VCSEL driver circuit (used to control the wavelength (630-700nm) and power (0-5W) of the laser), and a battery management circuit (to protect the battery from overcharging and over-discharging). When the user turns on the beauty device and selects the "Red Light + EMS" mode, the VCSEL laser light source outputs 660nm red light (through sapphire glass), and the EMS electrode outputs a 5mA microcurrent. When the contact head comes into contact with the skin, the laser penetrates to the dermis (promoting metabolism), and the microcurrent stimulates muscle contraction (improving skin firmness).

[0091] In some embodiments, the beauty device acquires a unique wavelength combination, which is generated based on skin type information and beauty needs information; adjusts the VCSEL laser light source corresponding to the contact head according to the unique wavelength combination to control the output wavelength of the VCSEL laser light source; collects skin reflection light data in real time through a built-in photosensor; and adjusts the output power and wavelength of the VCSEL laser light source according to the skin reflection light data.

[0092] This beauty device integrates an intelligent control system, and its workflow is as follows: Information Input and Solution Generation: Users input their skin type information (e.g., dry, oily, sensitive) and beauty needs (e.g., anti-aging, whitening, moisturizing) through an app or the device interface. The algorithm generates a unique wavelength combination based on this information (e.g., primarily 650nm red light, combined with a specific proportion of near-infrared light). Precise Light Source Control: The main control chip adjusts the driving current of the VCSEL laser light source within the contact head according to the unique wavelength combination, thereby controlling the wavelength and intensity of its output light wave.

[0093] The device incorporates a built-in photosensor that collects real-time data on reflected light from the skin surface during the treatment. The processor analyzes this data to indirectly infer changes in skin absorption, temperature, or blood flow. Based on the analysis, the system dynamically fine-tunes the output power and wavelength of the VCSEL laser, achieving closed-loop intelligent control through "sensing-feedback-adjustment" to avoid overstimulation or insufficient energy.

[0094] Moving away from a "one-size-fits-all" approach, we offer customized phototherapy solutions for different users. Through real-time feedback and adjustments, energy output remains within a safe and effective "sweet spot," maximizing beauty benefits while ensuring a safe user experience. This upgrades the beauty device from a simple tool to a smart care device, enhancing the product's technological sophistication and user engagement.

[0095] The beauty device is the complete product form of this application, consisting of a beauty instrument body, a contact head (any embodiment of this application), and a waterproof shell (any embodiment of this application). Its core function is to integrate light-based beauty treatment (VCSEL laser) and EMS electrical stimulation, and to ensure safety through a waterproof design.

[0096] The waterproof housing (main body lower shell, head liner, head lower shell, main body upper shell) is assembled into a sealed cavity using a snap-fit ​​structure, and the battery and main board PCB are placed inside. The contact head (with EMS electrodes and VCSEL laser) is connected to the main body of the beauty device via a rotating structure (magnetic hinge). A Type-C charging port (with a waterproof plug), function buttons (touch-sensitive, sealed design), and indicator lights (displaying battery level and working mode) are installed on the main body. The main board PCB integrates an EMS drive circuit (for controlling the micro-current output of the electrodes, current range 0-10mA, frequency 1-100Hz), a VCSEL drive circuit (for controlling the laser wavelength (630-700nm) and power (0-5W)), and a battery management circuit (to protect the battery from overcharging and over-discharging). When the user turns on the beauty device and selects the "Red Light + EMS" mode, the VCSEL laser light source outputs 660nm red light (through sapphire glass), and the EMS electrode outputs a 5mA microcurrent. When the contact head comes into contact with the skin, the laser penetrates to the dermis (promoting metabolism), and the microcurrent stimulates muscle contraction (improving skin firmness).

[0097] The beauty device provided in this application addresses the core problems of existing technologies, achieving a comprehensive improvement in safety, effectiveness, comfort, and intelligence. Specific beneficial effects are as follows: 1. Ultimate safety protection, eliminating the risk of liquid intrusion: The double-sealed cavity formed by the "main body lower shell + head liner + head lower shell + main body upper shell" (waterproof outer shell + additional sealing of the internal cavity), combined with the buckle structure and sealing ring, forms a tight waterproof barrier, completely preventing the penetration of nutrient essence and mask liquid into the battery and motherboard area, effectively preventing short circuits, damage or safety accidents, and greatly improving product safety.

[0098] 2. High light transmittance contact head, improving light energy utilization: Sapphire glass is used as the contact head material, which has extremely high light transmittance (transmitting more than 90% of visible light and near-infrared light) and stable chemical properties, and does not react with active cosmetics; combined with VCSEL laser light source (vertical cavity surface emission, less scattering, and uniform energy density), most of the light penetrates the contact head to reach the dermis layer of the skin, significantly improving the effects of phototherapy (such as promoting cell metabolism and anti-aging).

[0099] 3. Upgraded EMS electrode technology for optimized user experience: EMS electrodes are fabricated on sapphire glass using DPC metal plating or screen printing processes, resulting in extremely thin electrodes (flush with the substrate surface), completely eliminating the foreign object feeling of existing "overlay processes." Simultaneously, the electrodes seamlessly integrate with the substrate, preventing gel residue in gaps, making cleaning easy and hygienic. Furthermore, the staggered design of the EMS electrodes and VCSEL laser emission positions (light emission avoids the electrodes) solves the light obstruction problem during functional integration, achieving synergistic effects between illumination and EMS functionality.

[0100] 4. Flexible and adaptable design enhances ease of use: The contact head adopts 2.5D glass with a chamfered structure to improve skin adhesion; in some embodiments, the contact head can be rotated to adapt to the curved contours of different parts such as the face, neck, and shoulders, meeting diverse beauty needs; the head cover and the main body adopt a magnetic structure for easy disassembly and assembly, facilitating cleaning or replacement of the contact head; the main body is equipped with a silicone anti-slip pad for a comfortable grip and to prevent slipping during use.

[0101] 5. Intelligent adjustment system for personalized beauty: The beauty device can generate a unique wavelength combination based on the user's skin type (such as sensitive skin or oily skin) and beauty needs (such as spot removal or anti-wrinkle). The corresponding wavelength is adjusted and output through the VCSEL laser light source. At the same time, the built-in photosensitizer collects skin reflection light data in real time and dynamically adjusts the light power and wavelength to achieve "on-demand adjustment" and improve the targeting and accuracy of the beauty effect.

[0102] The beauty device described in this application addresses safety concerns through an optimized sealed structure, enhances light transmission with a high-transmittance contact head and VCSEL laser, improves user experience with upgraded EMS electrode technology, enhances convenience with a flexible and adaptable design, and enables personalized beauty treatments through an intelligent adjustment system. These technologies work synergistically to effectively overcome many shortcomings of existing beauty devices, significantly improving product safety, effectiveness, and user satisfaction, demonstrating outstanding innovation.

[0103] It should be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. It should be understood that when an element or layer is referred to as “on,” “adjacent to,” “connected to,” or “coupled to” other elements or layers, it may be directly on, adjacent to, connected to, or coupled to other elements or layers, or there may be intervening elements or layers. Conversely, when an element is referred to as “directly on,” “directly adjacent to,” “directly connected to,” or “directly coupled to” other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are merely used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of this application, the first element, component, area, layer, or portion discussed below may be referred to as a second element, component, area, layer, or portion.

[0104] Spatial relation terms such as “below,” “under,” “below,” “under,” “above,” “above,” etc., are used herein for convenience of description to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms are intended to also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, then the element or feature described as “below,” “under,” or “below” other elements or features will be oriented “above” other elements or features. Therefore, the exemplary terms “below” and “under” can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or otherwise) and the spatial descriptive terms used herein will be interpreted accordingly.

[0105] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising” and / or “including,” when used in this specification, identify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0106] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0107] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A contact head, characterized in that, It is set on a preset beauty device body; including a sapphire glass body; an EMS electrode is set on the sapphire glass body; a VCSEL laser light source is set inside the contact head, and the light emission position of the VCSEL laser light source is set to avoid the EMS electrode.

2. The contact head according to claim 1, characterized in that, The EMS electrode is fabricated on the sapphire glass body using a DPC metal plating process or a screen printing process, and the EMS electrode is made of an opaque material.

3. The contact head according to claim 1, characterized in that, The contact head is rotatable relative to the main body of the beauty device to adapt to the beauty needs of different parts of the body, and / or the sapphire glass body adopts a 2.5D glass design and is combined with a chamfered structure.

4. A waterproof shell, comprising a lower main shell, a head liner, a lower head shell, and an upper main shell, wherein the lower main shell, the head liner, the lower head shell, and the upper main shell are arranged in a sealed cavity by a snap-fit ​​structure; a sealing ring is embedded in the gap of the snap-fit ​​structure to form a sealing barrier.

5. The waterproof housing according to claim 4, characterized in that, The buckle structure includes buckle teeth, the angle of the barbs and the length of the elastic arm of the buckle teeth are optimized to ensure that the sealed cavity does not loosen during long-term use.

6. The waterproof housing according to claim 4, characterized in that, The inner layer of the sealed cavity is provided with a waterproof coating.

7. The waterproof casing according to claim 4, characterized in that, The magnetic sealing ring and the mating surface at the rotating connection form a double waterproof sealing structure.

8. The waterproof housing according to claim 4, characterized in that, The sealed cavity is used to house the battery and the motherboard PCB to prevent the beauty solution from coming into contact with the battery and the motherboard PCB.

9. A beauty device, characterized in that, It includes a beauty device body, a contact head as described in any one of claims 1-3, and a waterproof housing as described in any one of claims 4-8.

10. The beauty device according to claim 9, characterized in that, The beauty device acquires a unique wavelength combination, which is generated based on skin type information and beauty needs information. Adjust the VCSEL laser source corresponding to the contact head according to the exclusive wavelength combination to control the output wavelength of the VCSEL laser source; The built-in photosensor collects skin reflection data in real time; based on the skin reflection data, the output power and wavelength of the VCSEL laser source are adjusted.

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