Cosmetic device electrical system with double waterproof sealing and charging interface protection

Abstract

The invention relates to the technical field of personal care electric appliances, and discloses a beauty device electrical system with dual waterproof sealing and charging interface protection. Comprising a beautifying device body, a double-layer sealing structure is arranged in the beautifying device body, an outer layer is a waterproof outer layer composed of a head upper shell and a body outer shell, an inner layer is a closed cavity defined by a body lower shell, a head lining plate, the head lower shell and the body upper shell, and a battery and a mainboard PCB are contained in the closed cavity; the main body lower shell, the head lining plate, the head lower shell and the main body upper shell are assembled through a buckle structure; the charging interface is arranged on the beauty device main body and adopts a combined structure of a waterproof rubber plug and a metal dustproof net, and the waterproof rubber plug is automatically bounced off during charging and is reset and sealed after power failure; the insulation isolation layer is arranged between the battery and the mainboard PCB; the humidity sensor is arranged in the closed cavity; and the power supply control module is electrically connected with the mainboard PCB.

Description

Technical Field

[0001] This application relates to the field of personal care electrical appliances, and more particularly to an electrical system for a beauty device with double waterproof sealing and charging interface protection. Background Technology

[0002] With the improvement of living standards and the growth of personal care needs, beauty devices, as a type of home electronic device, have become increasingly popular. During use, these devices inevitably come into contact with water, water vapor, or humid environments, such as in high-humidity settings like bathrooms, or require cleaning after use.

[0003] Existing beauty devices typically employ relatively simple waterproofing solutions. One common approach is to use a complete potting seal. While this method offers adequate waterproofing, it renders the device non-removable. If internal electronic components (such as batteries or motherboards) fail, repairs become extremely difficult, essentially rendering the device unusable and increasing user costs and environmental burden. Another approach relies on simple silicone sleeves or sealing rings for localized waterproofing. However, the sealing reliability of this structure is insufficient, especially at complex snap-fit ​​joints. Over time, material aging or assembly errors can cause seal failure, allowing moisture to slowly seep into the device.

[0004] More critically, existing beauty devices generally lack proactive monitoring and protection mechanisms for moisture infiltration. Even with waterproof designs, minor, invisible damage can still allow small amounts of moisture to penetrate. This moisture accumulates within the sealed cavity, gradually corroding the delicate motherboard PCB circuitry, leading to decreased device performance, malfunctions, and even serious safety hazards such as battery short circuits without the user's knowledge. Simultaneously, the charging port, as a crucial connection between the device and the outside world, is a weak point in waterproofing. Traditional rubber plugs require manual opening and closing, resulting in a poor user experience and easily being left open due to forgetfulness, thus losing their protective function; furthermore, without internal moisture-proofing, charging in humid air can easily cause oxidation and corrosion of the interface's metal contacts.

[0005] Therefore, a system is urgently needed to solve at least one of the above problems. Summary of the Invention

[0006] This application provides an electrical system for a beauty device with dual waterproof seals and charging interface protection. It aims to provide a solution that not only offers a more reliable and easier-to-maintain dual waterproof seal at the physical level, but also introduces an intelligent humidity monitoring and power protection mechanism, forming a complete safety system from "passive defense" to "active monitoring and protection", thereby fundamentally improving the electrical safety and long-term reliability of beauty devices in complex usage environments.

[0007] This application provides a beauty device electrical system with dual waterproof sealing and charging interface protection, including: The main body of the beauty device has a double-layer sealing structure. The outer layer is a waterproof outer layer composed of a head shell and a main body shell. The inner layer is a sealed cavity formed by a main body shell, a head liner, a head shell, and a main body shell. The sealed cavity houses the battery and the main board PCB. The main body shell, head liner, head shell, and main body shell are assembled by a snap-fit ​​structure, and a sealing ring is embedded in the snap-fit ​​gap to form a sealing barrier. The charging interface is located on the main body of the beauty device and adopts a combination structure of waterproof rubber plug and metal dustproof mesh. The waterproof rubber plug automatically pops open during charging and resets and seals after power is cut off. The inside of the charging interface is coated with a moisture-proof coating. An insulating layer is provided between the battery and the motherboard PCB; A humidity sensor is installed in a sealed cavity and electrically connected to the motherboard PCB to monitor humidity data in the sealed cavity in real time. The power control module is electrically connected to the motherboard PCB. When the humidity sensor detects that the humidity data exceeds a preset threshold, the power control module automatically disconnects the battery from the motherboard PCB.

[0008] In some embodiments, the motherboard PCB is provided with an intelligent humidity trend prediction module. The intelligent humidity trend prediction module is configured to: receive real-time humidity data collected by a humidity sensor at a preset frequency and store it as a sequence of data containing timestamps; segment the sequence of data using a sliding window algorithm and calculate the mean, variance, and linear regression slope of humidity in each window; compare the linear regression slope with a preset humidity rise rate threshold, and simultaneously compare the mean of the current window with the preset humidity threshold; when the slope exceeds the threshold and the mean reaches the threshold, send a pre-alarm signal to the power control module, trigger a buzzer to sound, and generate and display a prompt message on the beauty device display screen.

[0009] In some embodiments, a metal contact sensor and a micro stepper motor are provided at the charging interface. The mainboard PCB is configured such that: when the metal contact sensor detects the insertion of the charging head, it sends an insertion trigger signal to the mainboard PCB; after receiving the signal, the mainboard PCB controls the stepper motor to rotate 180 degrees forward, and pulls the waterproof rubber plug to fully open along a preset track through a linkage mechanism; during the charging process, the charging current is monitored in real time through a current detection circuit, and when the current drops below 10mA and remains below 10 seconds, it is determined that the charging is complete; the stepper motor is controlled to rotate 180 degrees in reverse, pushing the waterproof rubber plug back to its original position until the rubber plug is completely in contact with the edge of the charging interface.

[0010] In some embodiments, a miniature pressure sensor is provided within the outer sealing structure, and a dual-layer sealing status diagnostic module is provided on the motherboard PCB. This module is configured to: collect real-time air pressure data of the outer sealing cavity from the pressure sensor and send it to the motherboard PCB; compare the air pressure data with a preset normal sealing air pressure range; when the air pressure exceeds the normal sealing air pressure range, it is determined that the outer sealing has failed, a fault signal is sent to the power control module, the connection between the battery and the motherboard PCB is disconnected, and a fault code is displayed on the beauty device indicator light; the fault type, occurrence time, and air pressure curve of the outer sealing failure are stored in the built-in memory.

[0011] In some embodiments, the motherboard PCB is provided with a "fault classification processing module" configured to: divide the humidity sensor data into three levels: mild abnormality, moderate abnormality, and severe abnormality; wherein, the humidity sensor data corresponding to mild abnormality is lower than the humidity sensor data corresponding to moderate abnormality, and the humidity sensor data corresponding to moderate abnormality is lower than the humidity sensor data corresponding to severe abnormality; in the case of mild abnormality, only the high-power components of the beauty device are cut off, while the control circuit remains operational; in the case of moderate abnormality, all functional circuits are cut off, only the humidity sensor and power control module remain operational, and a buzzer is triggered to sound continuously; in the case of severe abnormality, the power control module is completely disconnected from the battery output, and a warning message is generated to a preset user terminal.

[0012] In some embodiments, the motherboard PCB is provided with an adaptive power management module, configured to: receive humidity sensor data and temperature sensor data, input them into a pre-trained humidity-power mapping model; the humidity-power mapping model outputs a target power, controlling the DC-DC converter to reduce the output voltage from the normal operating voltage to the minimum safe voltage, thereby reducing the overall power consumption of the motherboard PCB; re-acquire humidity data, and if the rate of decrease of the humidity data is greater than a preset rate of decrease, restore the output voltage to the normal operating voltage; if the rate of increase of the humidity data is greater than a preset rate of increase, reduce the output voltage to the minimum safe voltage until the humidity stabilizes or power-off protection is triggered.

[0013] In some embodiments, the main body of the beauty device is provided with a touch screen and a Bluetooth module, and the motherboard PCB is configured to: merge humidity data, pressure data, and charging interface status into a status data packet; generate a sealing performance curve based on the status data packet, the sealing performance curve including the humidity change trend corresponding to a preset time range; generate a humidity over-limit warning when humidity is detected to be excessive based on the sealing performance curve; and, upon receiving a sealing detection command in response to the humidity over-limit warning, control the humidity sensor to continuously collect multiple humidity data and generate a sealing detection result based on the multiple humidity data.

[0014] In some embodiments, the motherboard PCB is provided with a non-volatile storage module, which is configured to: record detailed information for each humidity exceeding the standard event, including the occurrence time, current humidity value, temperature value, charging interface status and user operation information; and record the number of times the charging interface is plugged in and out and the time for each event.

[0015] In some embodiments, a Wi-Fi module is provided on the motherboard PCB and configured to: send device health data to a cloud server according to preset sending rules; the device health data includes average humidity, average pressure, number of failures, and number of charging cycles; the cloud server analyzes the device health data using a clustering algorithm to identify high-frequency sealing failure scenarios, including incomplete reset of the rubber plug after charging; when the cloud generates an optimized humidity trend prediction model, it sends an upgrade command to the beauty device; after receiving the command, the beauty device downloads the upgrade package corresponding to the humidity trend prediction model, verifies its integrity, replaces the installed humidity trend prediction model, and restarts to complete the upgrade.

[0016] In some embodiments, a miniature push rod mechanism is provided at the snap-fit ​​of the inner sealing structure for adjusting the snap-fit ​​preload. The mainboard PCB is configured to: receive temperature sensor data and input it into a temperature-preload model, which is trained based on the thermal expansion coefficient of the sealing ring and the mechanical properties of the snap-fit; output a target preload from the temperature-preload model and control the push rod mechanism to extend by 0.5mm to increase the squeezing force of the snap-fit ​​on the sealing ring; when the temperature returns to the normal range, control the push rod mechanism to retract to the initial position to restore the initial preload; acquire humidity data through a humidity sensor to monitor the adjusted sealing performance; if the humidity data meets the preset humidity range, maintain the current preload; if the humidity data does not meet the preset humidity range, adjust the push rod stroke.

[0017] This invention combines an outer waterproof layer (composed of a shell) with an inner sealed cavity for critical internal components, creating a double layer of protection. Even if the outer seal fails unexpectedly in extreme circumstances, the inner seal can still protect the core electronic components, significantly reducing the risk of water ingress.

[0018] By installing a humidity sensor inside the sealed inner cavity and linking it with the power control module, the system can monitor the internal environment in real time. Once an abnormal increase in humidity is detected (indicating possible leakage), the system can proactively cut off the power supply before short circuits or other faults occur, thus preventing equipment damage and potential safety accidents, transforming "post-event remediation" into "pre-event prevention."

[0019] The charging port features an automatic pop-out and resealing design, eliminating the need for manual operation by the user. This ensures both convenience during charging and a secure seal when not charging. An internal moisture-proof coating further enhances the corrosion resistance of this area in humid environments.

[0020] Compared to monolithic potting, the double-sealed structure allows for the disassembly, repair, or replacement of internal modules (such as battery replacement), reducing the product's total lifespan cost. Simultaneously, the active protection mechanism effectively prevents permanent damage to the circuit boards caused by moisture, extending the equipment's lifespan.

[0021] This invention organically integrates mechanical sealing, material protection, and electronic intelligent control technology to form a closed-loop, systematic safety solution, comprehensively improving the adaptability and safety level of beauty devices under harsh operating conditions.

[0022] 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

[0023] 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.

[0024] Figure 1 This is a schematic block diagram of the electrical system of a beauty device with dual waterproof sealing and charging interface protection provided in one embodiment of this application; Figure 2 This is a schematic diagram of the electrical system of a beauty device with double waterproof sealing and charging interface protection provided in one embodiment of this application; Figure 3 This is an exploded view of the electrical system of a beauty device with dual waterproof seals and charging interface protection provided in one embodiment of this application.

[0025] 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

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] With the improvement of living standards and the growth of personal care needs, beauty devices, as a type of home electronic device, have become increasingly popular. During use, these devices inevitably come into contact with water, water vapor, or humid environments, such as in high-humidity settings like bathrooms, or require cleaning after use.

[0033] Existing beauty devices typically employ relatively simple waterproofing solutions. One common approach is to use a complete potting seal. While this method offers adequate waterproofing, it renders the device non-removable. If internal electronic components (such as batteries or motherboards) fail, repairs become extremely difficult, essentially rendering the device unusable and increasing user costs and environmental burden. Another approach relies on simple silicone sleeves or sealing rings for localized waterproofing. However, the sealing reliability of this structure is insufficient, especially at complex snap-fit ​​joints. Over time, material aging or assembly errors can cause seal failure, allowing moisture to slowly seep into the device.

[0034] More critically, existing beauty devices generally lack proactive monitoring and protection mechanisms for moisture infiltration. Even with waterproof designs, minor, invisible damage can still allow small amounts of moisture to penetrate. This moisture accumulates within the sealed cavity, gradually corroding the delicate motherboard PCB circuitry, leading to decreased device performance, malfunctions, and even serious safety hazards such as battery short circuits without the user's knowledge. Simultaneously, the charging port, as a crucial connection between the device and the outside world, is a weak point in waterproofing. Traditional rubber plugs require manual opening and closing, resulting in a poor user experience and easily being left open due to forgetfulness, thus losing their protective function; furthermore, without internal moisture-proofing, charging in humid air can easily cause oxidation and corrosion of the interface's metal contacts.

[0035] This application provides an electrical system for a beauty device with dual waterproof seals and charging interface protection. It aims to provide a solution that not only offers a more reliable and easier-to-maintain dual waterproof seal at the physical level, but also introduces an intelligent humidity monitoring and power protection mechanism, forming a complete safety system from "passive defense" to "active monitoring and protection", thereby fundamentally improving the electrical safety and long-term reliability of beauty devices in complex usage environments.

[0036] Please refer to Figures 1 to 3 This application provides an electrical system for a beauty device with dual waterproof sealing and charging interface protection, including a beauty device body 200 (connected to a contact head 100). The beauty device body has a double-layer sealing structure. The outer layer is a waterproof outer layer composed of a head upper shell and a body outer shell. The inner layer is a sealed cavity formed by a body lower shell, a head liner, a head lower shell, and a body upper shell. The sealed cavity houses a battery and a motherboard PCB. The body lower shell, head liner, head lower shell, and body upper shell are assembled via a snap-fit ​​structure, and sealing rings are embedded in the snap-fit ​​gaps to form a sealing barrier. A charging interface is provided on the beauty device. The main body adopts a combination structure of a waterproof rubber plug and a metal dustproof mesh. The waterproof rubber plug automatically pops open during charging and resets to seal after power is cut off. The charging interface is coated with a moisture-proof coating. An insulating isolation layer is set between the battery and the motherboard PCB. A humidity sensor is set in a sealed cavity and electrically connected to the motherboard PCB to monitor the humidity data in the sealed cavity in real time. A power control module is electrically connected to the motherboard PCB. When the humidity sensor detects that the humidity data exceeds a preset threshold, the power control module automatically cuts off the electrical connection between the battery and the motherboard PCB.

[0037] For example, such as Figure 3As shown, the electrical system of the beauty device with double waterproof sealing and charging interface protection 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 snap-fit ​​structure 22.

[0038] Specifically, this application aims to address the pain points of existing beauty devices in terms of waterproof design, such as poor sealing reliability, difficult maintenance, lack of active protection, and easily damaged charging interfaces. This system significantly improves product safety, reliability, and user experience by constructing a comprehensive solution integrating dual physical sealing, intelligent active monitoring and protection, and user-friendly interface protection.

[0039] The system mainly consists of the following core modules: The waterproof outer layer, composed of the head shell and the main body shell, forms the outermost protective casing of the equipment. This layer is primarily responsible for resisting direct liquid splashes, rinsing, and high humidity environments during daily use. As the first line of defense, it can block most moisture and reduce the pressure on the internal sealing structure.

[0040] The sealed core cavity is enclosed by the main body lower shell, head liner, head lower shell, and main body upper shell, forming an independent, highly sealed cavity. All critical electrical components, including the battery and motherboard PCB, are protected within this cavity.

[0041] The components forming the sealed cavity are assembled using a snap-fit ​​structure, achieving a simple, screwless design and rapid assembly. To address the inherent gaps in the snap-fit ​​structure, sealing rings are specifically embedded within the assembly gaps of the snaps. This design forms a reliable sealing barrier; even if a small amount of moisture penetrates the outer layer, it will be effectively blocked by this second line of defense, ensuring the dryness of the core electronic components.

[0042] The charging port is a crucial point for the device to connect to the outside world, and it is also a traditionally weak point in waterproofing. This solution has made double reinforcements in this regard.

[0043] This system eliminates the need for manual insertion and removal of traditional rubber plugs, which are easily forgotten. The waterproof rubber plug is linked to the charging mechanism, automatically popping open when the charger is inserted and automatically resealing after charging is complete. This completely eliminates the risk of the interface being opened due to user negligence, achieving seamless, end-to-end protection.

[0044] The metal contacts inside the charging interface are coated with a moisture-proof coating (such as a nano-hydrophobic coating or a specific insulating varnish). Even if extremely humid air enters, this coating can effectively prevent oxidation and corrosion of the metal contacts, ensuring charging stability and the lifespan of the interface.

[0045] A humidity sensor is installed inside the sealed cavity and electrically connected to the mainboard PCB. It can monitor humidity changes inside the cavity in real time.

[0046] The system includes a power control module connected to the motherboard PCB and continuously receiving data from the humidity sensor. A preset safe humidity threshold is established. Once the humidity sensor detects that the humidity level inside the cavity exceeds this threshold, the power control module immediately takes action, automatically disconnecting the battery from the motherboard PCB.

[0047] This mechanism effectively prevents the battery from continuing to operate in a humid environment, thus avoiding damage to the motherboard PCB circuit due to short circuits or electrochemical corrosion. It also greatly reduces the serious safety risks such as thermal runaway that may be caused by short circuits in humid environments.

[0048] An insulating layer is placed between the battery and the motherboard PCB. This layer serves as an additional safety measure, preventing direct short circuits between the battery and the circuitry even in the extremely rare event of conductive liquid intrusion, thus adding an extra layer of protection.

[0049] When users use the beauty device in high-humidity environments such as bathrooms, the outer shell protects against moisture and water droplets. When cleaning the device after use, the water flow is blocked by the outer layer, and even if a small amount of moisture attempts to enter through the assembly gaps, it will be effectively intercepted by the snap-lock sealing ring of the inner sealed cavity.

[0050] During charging, the waterproof rubber plug on the charging port automatically pops open when the user inserts the charger, requiring no manual operation. After charging is complete, unplugging the charger causes the rubber plug to automatically reset, ensuring the port remains sealed at all times. An internal moisture-proof coating protects the contacts from environmental moisture. The internal humidity sensor operates continuously throughout the device's lifespan. Even if prolonged use or an accident causes a trace amount of moisture to eventually seep into the sealed cavity, the humidity level will rise.

[0051] When the humidity level reaches the preset safety threshold, the power control module will instantly activate and cut off the power supply to the entire unit.

[0052] At this point, the device will stop working (or issue an alarm to the user via indicator lights, app, etc.). The user will realize that the device is at risk of water damage and needs to be sent for repair and inspection, thus preventing the device from continuing to operate in a damaged state and causing irreversible damage.

[0053] The electrical system for the beauty device provided in this application integrates a dual physical sealing structure, intelligent humidity monitoring and power protection, and an automatically protected charging interface to construct a multi-layered, three-dimensional safety protection system. It not only solves the problems of unreliable waterproofing and difficult maintenance in existing technologies, but more importantly, it introduces the concept of "preventive protection," nipping potential safety hazards in the bud and greatly improving the electrical safety, long-term reliability, and user experience of the beauty device.

[0054] In some embodiments, the motherboard PCB is provided with an intelligent humidity trend prediction module. The intelligent humidity trend prediction module is configured to: receive real-time humidity data collected by a humidity sensor at a preset frequency and store it as a sequence of data containing timestamps; segment the sequence of data using a sliding window algorithm and calculate the mean, variance, and linear regression slope of humidity in each window; compare the linear regression slope with a preset humidity rise rate threshold, and simultaneously compare the mean of the current window with the preset humidity threshold; when the slope exceeds the threshold and the mean reaches the threshold, send a pre-alarm signal to the power control module, trigger a buzzer to sound, and generate and display a prompt message on the beauty device display screen.

[0055] This embodiment integrates an intelligent humidity trend prediction module on the motherboard PCB. The core function of this module is to analyze the trend of humidity changes, not just the current absolute value, thereby achieving early warning. It continuously records humidity data and uses algorithms to calculate its rate of change and average level. When the system identifies that the humidity is rising rapidly and has reached a level of concern, it will issue a visual and audible warning signal to the user before the power is forcibly cut off.

[0056] The humidity sensor collects humidity values ​​inside the sealed cavity at preset fixed time intervals (e.g., once every 10 seconds). Each data point is accompanied by a precise timestamp, forming a set of time-series data.

[0057] The system uses a sliding time window (e.g., analyzing data from the most recent 5 minutes) to dynamically process these sequence data. For the data within the window, the system performs three key calculations: mean humidity: to understand the average humidity level during that time period; variance: to determine whether humidity fluctuations are drastic; and linear regression slope: this is crucial for prediction, quantifying whether humidity is stable, decreasing, or increasing at a rapid pace.

[0058] The system compares the calculated linear regression slope (i.e., the rate of increase in humidity) with a preset rate threshold; at the same time, it compares the current average window humidity with a warning humidity threshold that is below the shutdown threshold.

[0059] The system will determine that there is a high risk of continuous moisture intrusion if and only if both of the following conditions are met simultaneously: the rate of increase in humidity exceeds the threshold and the average humidity reaches or exceeds the warning threshold.

[0060] Once a risk is determined, the module will immediately send a pre-alarm signal to the power control module. At this time, the device will: trigger a buzzer to sound intermittently; and generate and display a prompt message on the beauty device's display screen, such as "Internal moisture detected, please stop using immediately and dry the device."

[0061] This gives users a valuable buffer time, allowing them to take action (such as shutting down or drying) before the device is completely powered off and rendered unusable, potentially avoiding an expensive repair.

[0062] In some embodiments, a metal contact sensor and a micro stepper motor are provided at the charging interface. The mainboard PCB is configured such that: when the metal contact sensor detects the insertion of the charging head, it sends an insertion trigger signal to the mainboard PCB; after receiving the signal, the mainboard PCB controls the stepper motor to rotate 180 degrees forward, and pulls the waterproof rubber plug to fully open along a preset track through a linkage mechanism; during the charging process, the charging current is monitored in real time through a current detection circuit, and when the current drops below 10mA and remains below 10 seconds, it is determined that the charging is complete; the stepper motor is controlled to rotate 180 degrees in reverse, pushing the waterproof rubber plug back to its original position until the rubber plug is completely in contact with the edge of the charging interface.

[0063] This embodiment aims to achieve fully automatic and precise control of the waterproof rubber plug for the charging interface. It detects charging behavior through a metal contact sensor, executes the opening and closing action using a micro stepper motor and linkage mechanism, and intelligently determines the charging status through current detection to trigger a reset seal.

[0064] When the charging head contacts the metal contacts inside the charging interface, the metal contact sensor detects the connection and sends an insertion trigger signal to the motherboard PCB. Upon receiving the signal, the motherboard PCB immediately drives a micro stepper motor to rotate 180 degrees clockwise. The motor, through a linkage mechanism, converts the rotational motion into linear pulling, precisely and completely ejecting the waterproof rubber plug along a preset track, exposing the charging interface. Charging completion detection and automatic sealing: During charging, the current detection circuit on the motherboard PCB continuously monitors the charging current. As the battery approaches full charge, the current drops to an extremely low level. The system is set to determine charging completion when the current remains below 10mA for 10 seconds.

[0065] Once the detection is complete, the motherboard PCB immediately controls the micro stepper motor to rotate 180 degrees, pushing the linkage mechanism to reset the waterproof rubber plug and ensure it is fully fitted to the edge of the charging interface, restoring a seal. The entire process requires no manual operation of the rubber plug by the user, improving convenience and fundamentally eliminating the risk of the interface being left open due to forgetfulness.

[0066] In some embodiments, a miniature pressure sensor is provided within the outer sealing structure, and a dual-layer sealing status diagnostic module is provided on the motherboard PCB. This module is configured to: collect real-time air pressure data of the outer sealing cavity from the pressure sensor and send it to the motherboard PCB; compare the air pressure data with a preset normal sealing air pressure range; when the air pressure exceeds the normal sealing air pressure range, it is determined that the outer sealing has failed, a fault signal is sent to the power control module, the connection between the battery and the motherboard PCB is disconnected, and a fault code is displayed on the beauty device indicator light; the fault type, occurrence time, and air pressure curve of the outer sealing failure are stored in the built-in memory.

[0067] This embodiment adds a health monitoring function to the outer sealing structure. By embedding a miniature pressure sensor within the outer sealing cavity and equipping it with a diagnostic module, the system can sense the integrity of the outer seal in real time. Once a seal failure is detected (such as a cracked outer shell or improper assembly), protective measures can be taken immediately and the fault recorded.

[0068] A miniature pressure sensor embedded within the outer sealing structure continuously monitors the air pressure data of the sealed cavity. Under good sealing conditions, this air pressure should remain within a stable range. The dual-sealing status diagnostic module compares the real-time air pressure data with a preset normal sealing air pressure range. When the air pressure data exceeds the normal range (e.g., due to a crack in the outer casing causing an imbalance in internal and external air pressure), the system immediately determines that the outer seal has failed. Subsequently: a fault signal is sent to the power control module, immediately disconnecting the battery from the motherboard PCB as a preventative protection measure. A fault code is displayed on the beauty device's indicator light with a specific color or flashing pattern (e.g., flashing red), informing the user that the device has suffered physical damage.

[0069] The system will store relevant information about this malfunction, including the malfunction type (outer seal failure), the time of occurrence, and the pressure change curves before and after the malfunction, in its built-in memory. This data provides important information for subsequent maintenance and product improvement.

[0070] In some embodiments, the motherboard PCB is provided with a "fault classification processing module" configured to: divide the humidity sensor data into three levels: mild abnormality, moderate abnormality, and severe abnormality; wherein, the humidity sensor data corresponding to mild abnormality is lower than the humidity sensor data corresponding to moderate abnormality, and the humidity sensor data corresponding to moderate abnormality is lower than the humidity sensor data corresponding to severe abnormality; in the case of mild abnormality, only the high-power components of the beauty device are cut off, while the control circuit remains operational; in the case of moderate abnormality, all functional circuits are cut off, only the humidity sensor and power control module remain operational, and a buzzer is triggered to sound continuously; in the case of severe abnormality, the power control module is completely disconnected from the battery output, and a warning message is generated to a preset user terminal.

[0071] This embodiment introduces a refined fault classification and handling module, which adopts a tiered and differentiated response strategy based on the severity of humidity intrusion, rather than a blanket power outage. This allows for the preservation of equipment functionality or the provision of clearer fault indications while ensuring safety.

[0072] The module categorizes humidity sensor data into three distinct levels: Mild anomaly: Humidity is slightly elevated but still at a low level. Moderate anomaly: Humidity is significantly elevated, indicating that a small amount of moisture may have entered. Severe anomaly: Humidity reaches or approaches a dangerous level, posing a potential risk of immediate short circuit.

[0073] Mild anomaly: The system only shuts down the high-power components of the beauty device (such as radio frequency, LED headlights, and vibration motor), but keeps the core control circuit running. The device may still be able to display or perform basic settings. Moderate anomaly: The system shuts down all functional circuits, leaving only the humidity sensor and power control module running (to ensure continuous monitoring), and triggers a continuous buzzer to alert the user more strongly. Severe anomaly: The system completely disconnects the battery output from the power control module and generates a detailed warning message, which is sent to a preset user terminal (such as a mobile app) via a communication module (such as Bluetooth or Wi-Fi).

[0074] This tiered approach avoids overreactions (such as bricking the device) in cases of minor risk, improving the user experience while ensuring decisive action in truly dangerous situations.

[0075] In some embodiments, the motherboard PCB is provided with an adaptive power management module, configured to: receive humidity sensor data and temperature sensor data, input them into a pre-trained humidity-power mapping model; the humidity-power mapping model outputs a target power, controlling the DC-DC converter to reduce the output voltage from the normal operating voltage to the minimum safe voltage, thereby reducing the overall power consumption of the motherboard PCB; re-acquire humidity data, and if the rate of decrease of the humidity data is greater than a preset rate of decrease, restore the output voltage to the normal operating voltage; if the rate of increase of the humidity data is greater than a preset rate of increase, reduce the output voltage to the minimum safe voltage until the humidity stabilizes or power-off protection is triggered.

[0076] This embodiment uses an adaptive power management module to dynamically adjust the operating voltage and power consumption of the motherboard PCB when changes in ambient humidity are detected. This is an intelligent strategy of "downclocking" to protect itself in the event of potential risks.

[0077] The module receives real-time data from humidity and temperature sensors and inputs it into a pre-trained humidity-power mapping model. This model intelligently assesses the current environmental risk and outputs a recommended target power level. Based on the target power output by the model, the module controls the DC-DC converter to reduce the voltage supplied to the motherboard PCB from the normal operating voltage (e.g., 3.3V) to the minimum safe voltage (e.g., 2.5V), thereby significantly reducing the overall power consumption and heat generation of the motherboard.

[0078] After the voltage is reduced, the system re-collects humidity data. If the data shows that the rate of humidity decrease is greater than the preset value (indicating that the environment is improving or the measures are effective), the module will restore the voltage to the normal operating voltage, and the performance will return to normal. If the data shows that the rate of humidity increase is greater than the preset value (indicating that the risk has increased), the module will maintain or reduce the voltage to the minimum safe voltage again and continue to monitor until the humidity stabilizes or a higher level of power failure protection is triggered.

[0079] In the early stages of risk, reducing system energy consumption reduces the driving force of potential short-circuit current and electrochemical corrosion, thus buying time and opportunity to "rescue" the equipment.

[0080] In some embodiments, the main body of the beauty device is provided with a touch screen and a Bluetooth module, and the motherboard PCB is configured to: merge humidity data, pressure data, and charging interface status into a status data packet; generate a sealing performance curve based on the status data packet, the sealing performance curve including the humidity change trend corresponding to a preset time range; generate a humidity over-limit warning when humidity is detected to be excessive based on the sealing performance curve; and, upon receiving a sealing detection command in response to the humidity over-limit warning, control the humidity sensor to continuously collect multiple humidity data and generate a sealing detection result based on the multiple humidity data.

[0081] This embodiment enhances the human-computer interaction function, allowing users to intuitively understand the health status of the device and proactively initiate sealing performance testing via a touch screen and Bluetooth connection.

[0082] The motherboard PCB packages information such as humidity data, pressure data, and charging interface status into a status data package, and generates a visual sealing performance curve on the screen based on this data, showing the humidity change trend over a period of time (such as 24 hours).

[0083] When the system determines that humidity exceeds the limit based on the curve, it generates a humidity over-limit warning and displays it on the screen. After seeing the warning, the user can click the corresponding "Detect Now" button on the screen to send a seal test command to the motherboard PCB. Upon receiving the command, the motherboard PCB controls the humidity sensor to continuously collect data at a high frequency, acquiring multiple data points. Based on this series of densely collected data, the system analyzes its stability and trends, ultimately generating a clear seal test result on the screen, such as "Good seal" or "Deteriorated seal, test recommended." This transforms the internal, invisible state into user-visible information, enhancing transparency and the user's sense of control over the device.

[0084] In some embodiments, the motherboard PCB is provided with a non-volatile storage module, which is configured to: record detailed information for each humidity exceeding the standard event, including the occurrence time, current humidity value, temperature value, charging interface status and user operation information; and record the number of times the charging interface is plugged in and out and the time for each event.

[0085] In this embodiment, a non-volatile storage module (such as EEPROM or Flash) is set on the motherboard PCB to record key historical events of the device in a long-term and detailed manner, forming a complete "black box".

[0086] This module faithfully records detailed information for each humidity exceeding the limit event, including: the time of occurrence, the humidity value at the time of triggering, the ambient temperature, whether the charging port was on or off at the time, and what user actions were taken afterward (such as clicking "ignore" or "power off immediately"). It also records the number of times the charging port is plugged in and unplugged, and the specific time of each instance.

[0087] This data is extremely valuable for accurately locating the root cause of problems during after-sales repairs (for example, discovering that most failures occur after charging, proving the importance of the automatic sealing mechanism), and for product development teams to improve the next generation of designs.

[0088] In some embodiments, a Wi-Fi module is provided on the motherboard PCB and configured to: send device health data to a cloud server according to preset sending rules; the device health data includes average humidity, average pressure, number of failures, and number of charging cycles; the cloud server analyzes the device health data using a clustering algorithm to identify high-frequency sealing failure scenarios, including incomplete reset of the rubber plug after charging; when the cloud generates an optimized humidity trend prediction model, it sends an upgrade command to the beauty device; after receiving the command, the beauty device downloads the upgrade package corresponding to the humidity trend prediction model, verifies its integrity, replaces the installed humidity trend prediction model, and restarts to complete the upgrade.

[0089] This embodiment connects the device to the cloud via a Wi-Fi module, enabling data aggregation, remote intelligent analysis, and online firmware upgrades.

[0090] The beauty device sends device health data, including averaged humidity, pressure, number of malfunctions, and number of charging cycles, to a cloud server according to preset rules (such as once a day or when an event occurs). The cloud server uses clustering algorithms to analyze massive amounts of device data and identify common problems. For example, if a large number of "outer seal failure" malfunctions occur immediately after charging, it can be determined that "rubber stopper not fully reset after charging" is a high-frequency scenario.

[0091] Based on a larger dataset, the cloud can train a more accurate and forward-looking humidity trend prediction model. Once the new model is ready, the cloud sends an upgrade command to the beauty device. Upon receiving the command, the beauty device downloads the upgrade package corresponding to the humidity trend prediction model, verifies the integrity of the files, replaces the old model in the device with the new model, and restarts the relevant services to complete the upgrade.

[0092] This enables the entire product ecosystem to continuously learn and evolve, allowing all networked devices to benefit from the enhanced security brought about by collective data intelligence.

[0093] In some embodiments, a miniature push rod mechanism is provided at the snap-fit ​​of the inner sealing structure for adjusting the snap-fit ​​preload. The mainboard PCB is configured to: receive temperature sensor data and input it into a temperature-preload model, which is trained based on the thermal expansion coefficient of the sealing ring and the mechanical properties of the snap-fit; output a target preload from the temperature-preload model and control the push rod mechanism to extend by 0.5mm to increase the squeezing force of the snap-fit ​​on the sealing ring; when the temperature returns to the normal range, control the push rod mechanism to retract to the initial position to restore the initial preload; acquire humidity data through a humidity sensor to monitor the adjusted sealing performance; if the humidity data meets the preset humidity range, maintain the current preload; if the humidity data does not meet the preset humidity range, adjust the push rod stroke.

[0094] This embodiment represents an advanced optimization of the inner sealing structure. It recognizes that temperature variations cause thermal expansion and contraction of the sealing ring material, thus affecting sealing performance. By integrating a micro-push rod mechanism at the snap-fit ​​and establishing a temperature-preload model, the system can automatically and finely adjust the snap-fit's clamping force on the sealing ring based on real-time temperature, ensuring optimal sealing at any temperature.

[0095] The system receives data from a temperature sensor and inputs it into a pre-trained temperature-preload model. This model considers the thermal expansion coefficient of the seal and the mechanical properties of the snap-fit, and outputs a target preload force required at the current temperature.

[0096] Based on the target preload, the miniature push rod mechanism at the control buckle of the motherboard PCB will move, for example, extend by 0.5mm, to increase the squeezing force of the buckle on the sealing ring and compensate for any gaps that may be caused by low-temperature shrinkage.

[0097] When the temperature returns to normal, the push rod mechanism retracts to its initial position. After adjusting the preload, the system continuously monitors the sealing performance via a humidity sensor. If the humidity data remains within the preset safe range, the adjustment is effective, and the system maintains its current state. If the humidity data remains abnormal, the system will continue to fine-tune the push rod's stroke until an effective seal is achieved.

[0098] This is an active, adaptive seal maintenance technology that can cope with different climates and usage environments, greatly improving the reliability of the product in different regions.

[0099] In some embodiments, to address the significant differences in humidity levels across regions, a regional collaborative filtering algorithm dynamically adjusts the humidity warning threshold, resolving the issues of false alarms in humid southern regions and missed alarms in dry northern regions when fixed thresholds are used. The system automatically optimizes the humidity warning strategy by combining historical humidity data from the user's location with the usage habits of users in similar regions, thereby improving warning accuracy.

[0100] The beauty device obtains the latitude and longitude of the user's location via a Wi-Fi module (or obtains regional information through authorization via a mobile app), and pulls historical data such as the average daily humidity, maximum humidity, and humidity fluctuation variance of the region over the past 30 days from a cloud server. Simultaneously, it collects user usage scenario tags (such as "used in the bathroom" or "used in the bedroom," inferred from user app input or sensors).

[0101] The collaborative filtering algorithm is used to cluster the humidity data of the user's region with regions with similar climates (such as latitude and precipitation zone) to obtain the baseline humidity threshold for the region (for example, the baseline threshold for humid southern regions is set to 80%RH, and for dry northern regions it is set to 70%RH).

[0102] Based on the user's usage scenario, the baseline threshold is adjusted according to the scenario: if the user often uses it in the bathroom (high humidity), the threshold is lowered by 5%RH (e.g., the threshold in a southern bathroom becomes 75%RH); if the user often uses it in the bedroom (low humidity), the threshold is raised by 3%RH.

[0103] The system automatically updates regional humidity data and user scenario tags every Monday morning, recalculates thresholds, and pushes them to the beauty devices. After adjustment, a sliding window verification method is used (e.g., simulating early warnings using humidity data from the past 7 days). If the false alarm rate (alarms triggered under normal humidity) is less than 3% and the missed alarm rate (alarms not triggered under excessive humidity) is less than 1%, the new thresholds are retained; otherwise, the algorithm parameters (e.g., cluster radius) are adjusted retrospectively.

[0104] If a user disagrees with the warning result (e.g., feels that "there is a warning even though it is very dry"), they can submit feedback through the APP. The system will then temporarily raise the user's threshold by 10%RH and incorporate the feedback data into the next model optimization.

[0105] In some embodiments, miniature humidity sensors are deployed in key areas of the beauty device's surface (such as the handle, head, and around the charging port), combined with an LSTM time series prediction algorithm, to detect in real time whether there is a risk of liquid (such as water or cosmetics) intrusion into the surface. When a sudden increase in surface humidity is detected, the outer sealing pre-tightening force is actively triggered (through a push rod mechanism) to lock the charging port, forming a dual active protection of "surface-inner layer" to prevent liquid from seeping into the interior.

[0106] Sensor deployment and data acquisition utilize four miniature capacitive humidity sensors (≤2mm×2mm in size) positioned on both sides of the beauty device handle, the front of the head, and the edge of the charging port, with a sampling frequency of 1Hz (once per second). The sensors detect the absolute humidity of the surface (rather than relative humidity) to avoid interference from temperature changes on the detection results.

[0107] The risk prediction model integrates surface humidity data with internal humidity (inner sealed cavity), temperature, and user actions (such as "cleaning in progress," determined by an accelerometer to indicate wiping activity), forming a multi-dimensional feature vector (e.g., [surface humidity = 20 g / m²]). 3 Internal humidity = 15g / m 3 Temperature = 25℃, Operation = Cleaning in progress]. Input the LSTM model (trained by collecting samples of "excessive surface humidity leading to internal water ingress") to predict whether liquid will invade the inner sealing cavity within the next 5 seconds (prediction accuracy ≥ 95%).

[0108] The proactive protection strategy includes the following actions if a high-risk scenario is predicted (e.g., a sudden 30% increase in surface humidity while the user is cleaning): Strengthening the outer seal: The system controls the micro-push rod mechanism at the outer snap-fit ​​to extend 0.5mm, increasing the pressure of the snap-fit ​​on the sealing ring and compensating for the expansion of the sealing ring due to surface liquid (wetness reduces the elasticity of the sealing ring). Locking the charging port: The system controls the micro-stepper motor to keep the waterproof rubber plug of the charging port sealed, preventing liquid from entering the interior through the charging port. User prompts: A voice prompt ("Liquid detected on the surface, please wipe it dry immediately") and a display warning (red icon + text "Surface is damp, please take precautions") are triggered.

[0109] After the protective action is executed, the system collects internal humidity data every 5 seconds. If the internal humidity does not rise within 1 minute, the protection is deemed effective, the push rod mechanism retracts to the initial position, and the rubber plug is unlocked; if the internal humidity rises by more than 5%, secondary protection is triggered (cutting off high-power components while retaining the control circuit).

[0110] In some embodiments, by integrating a miniature infrared camera and a contact humidity sensor at the charging port, combined with the YOLO image recognition algorithm, dual protection of "charging head legality identification + water detection" is achieved. This prevents short circuits caused by foreign objects (such as metal pieces or cotton swabs) and avoids contact corrosion or battery short circuits caused by charging with water.

[0111] A miniature infrared camera (320×240 resolution, supports low-light environments) is installed inside the upper part of the charging port to capture images of the inserted object; A contact humidity sensor is installed at the bottom of the charging port (to detect the surface humidity when the charging head is inserted). Both the camera and humidity sensor are connected to the motherboard via a flexible PCB, which does not affect the normal use of the charging interface.

[0112] When an object is inserted into the charging port, the camera automatically captures 3 frames (100ms interval) and inputs them into the YOLOv5-tiny model (a lightweight version suitable for embedded devices). The model identifies whether the charging head is an authorized charging head by recognizing its shape, markings, and pin layout (such as the shape of the USB-C interface and brand logo of a legitimate charging head). The model's training data includes over 2000 legitimate charging heads and over 1000 images of foreign objects.

[0113] If a foreign object (such as a metal piece or cotton swab) is detected, the system triggers the following: Rubber plug locking: Controls the micro stepper motor to keep the waterproof rubber plug sealed, preventing the foreign object from being fully inserted; Alarm prompt: Triggers a continuous buzzer (frequency 2kHz), and the display shows "Foreign object detected, please remove"; Data logging: Uploads the foreign object image and insertion time to the cloud for model optimization (such as adding new foreign object types).

[0114] If the charger is identified as an authorized charger, a contact humidity sensor detects the surface humidity of the charger insertion point (threshold set at 15% RH). If the humidity exceeds the threshold (indicating the charger is wet), the system triggers the following: Charge Refusal: The charging circuit is disconnected, and the display shows "The charger is wet, please dry it before charging"; Rubber Plug Sealing: The rubber plug remains sealed to prevent water from entering; User Guidance: Information on the dangers of a wet charger (such as short circuits and corrosion) is sent via the app. If the charger is identified as authorized and the humidity is normal, the system controls a micro stepper motor to rotate 180 degrees forward, opening the rubber plug and starting charging; after charging is complete, the motor reverses to reset.

[0115] In some embodiments, by collecting full lifecycle data of the sealing ring (such as usage time, temperature changes, number of preload adjustments, and humidity exposure time), a random forest regression model is used to predict the remaining lifespan of the sealing ring, and maintenance reminders are sent to users in advance to avoid sealing failures caused by sealing ring aging (such as cracks in the outer sealing layer or water leakage in the inner sealing ring).

[0116] The beauty device collects the following data via built-in sensors (stored in non-volatile memory): Sealing ring usage time: cumulative time calculated from the date of device activation (in hours); Temperature cycle count: number of "high temperature (>40℃) - low temperature (<10℃)" cycles experienced by the device (detected by temperature sensors); Pre-tightening force adjustment count: number of actions of the outer / inner layer snap-fit ​​push rod mechanism (recorded once per adjustment); Humidity exposure time: cumulative time when internal humidity exceeds the warning threshold (in minutes); Seal failure event: if the pressure sensor detects an outer seal failure (abnormal air pressure), it is marked as "Sealing ring failure" (label data).

[0117] The cloud server collects sealing ring data from multiple beauty devices, using "sealing ring usage time, temperature cycle count, pre-tightening force adjustment count, and humidity exposure time" as features and "remaining lifespan when the sealing ring fails" (e.g., "30 days remaining when it fails") as labels to train a random forest regression model (parameters: 100 trees, maximum depth 10).

[0118] The model is optimized through cross-validation (5-fold) to ensure that the prediction error is ≤7 days (i.e., the difference between the predicted remaining lifetime and the actual remaining lifetime does not exceed 7 days).

[0119] The beauty device automatically uploads the collected data to the cloud on the 1st of each month, and the cloud-based model predicts the remaining lifespan of the sealing ring (e.g., "Remaining lifespan: 60 days").

[0120] When the remaining lifespan is ≤30 days, the system will remind the user in the following ways: Display screen prompt: "The sealing ring is about to age, please contact after-sales service for replacement" (red text + icon); APP push: Send a reminder to the user's mobile APP, with a link to "Nearby after-sales service center search"; Voice prompt: If the user opens the beauty device, a voice prompt will be triggered ("Your beauty device's sealing ring is about to expire, please maintain it in time").

[0121] When a sealing ring failure occurs, the system uploads the device's characteristic data and failure time to the cloud to update the model's training set. The model is retrained quarterly to improve prediction accuracy (target: prediction error ≤ 5 days).

[0122] In some embodiments, by learning user habits (such as usage time, usage scenario, and cleaning process), the sealing state is adjusted in advance using a reinforcement learning algorithm (DQN) to optimize sealing performance before user use. For example, if a user typically uses the device at 8 pm and cleans it with a damp towel before use, the system can increase the pre-tightening force of the outer seal at 7:50 pm to ensure optimal sealing during use.

[0123] The beauty device collects the following behavioral data through an accelerometer (to determine if it is in use), a temperature sensor (to determine if it is in the bathroom), and user app input (such as "I usually use it at 8 pm"): common usage time: such as "8:00-8:30 pm" (inferred from 7 consecutive days of usage records); usage scenario: such as "bathroom" (inferred from high temperature and high humidity) and "bedroom" (moderate temperature and low humidity); cleaning habits: such as "wiping with a damp towel before use" (inferred from a sudden increase in surface humidity detected by a surface humidity sensor before use).

[0124] The reinforcement learning model uses DQN (Deep Q Network) as the action space (e.g., "outer push rod extends 0.4mm", "inner push rod extends 0.3mm", "no adjustment"), and "internal humidity change during use" as the reward function (the smaller the humidity change, the higher the reward; if the humidity change is 0, the reward is +10; if the humidity change exceeds 5%, the reward is -5).

[0125] The model's state space includes: current time, user's usual usage time, current temperature, current surface humidity, and usage scenarios over the past 7 days.

[0126] Based on model predictions, the system triggers the following actions 10 minutes before the user's usual usage time: If the user frequently uses the device in the bathroom (where humidity is high), the outer snap-fit ​​push rod mechanism extends by 0.5mm to increase the pre-tightening force of the sealing ring; depending on the current temperature (e.g., the sealing ring contracts when the temperature is low at night), the inner snap-fit ​​push rod mechanism extends by 0.3mm to compensate for the contraction of the sealing ring; and the system confirms that the rubber plug of the charging interface is in a sealed state (if it is not sealed, the system controls the motor to reset).

[0127] During use, the system monitors internal humidity changes (the humidity difference from the start to the end of use). If the humidity change is ≤3%, the advance preparation is deemed effective, and the model receives a +8 reward; if the humidity change is >5%, a -3 reward is received. The model's Q-network parameters are updated weekly, and the action strategy is optimized (e.g., adjusting the advance preparation time from 10 minutes to 15 minutes).

[0128] This invention combines an outer waterproof layer (composed of a shell) with an inner sealed cavity for critical internal components, creating a double layer of protection. Even if the outer seal fails unexpectedly in extreme circumstances, the inner seal can still protect the core electronic components, significantly reducing the risk of water ingress.

[0129] By installing a humidity sensor inside the sealed inner cavity and linking it with the power control module, the system can monitor the internal environment in real time. Once an abnormal increase in humidity is detected (indicating possible leakage), the system can proactively cut off the power supply before short circuits or other faults occur, thus preventing equipment damage and potential safety accidents, transforming "post-event remediation" into "pre-event prevention."

[0130] The charging port features an automatic pop-out and resealing design, eliminating the need for manual operation by the user. This ensures both convenience during charging and a secure seal when not charging. An internal moisture-proof coating further enhances the corrosion resistance of this area in humid environments.

[0131] Compared to monolithic potting, the double-sealed structure allows for the disassembly, repair, or replacement of internal modules (such as battery replacement), reducing the product's total lifespan cost. Simultaneously, the active protection mechanism effectively prevents permanent damage to the circuit boards caused by moisture, extending the equipment's lifespan.

[0132] This invention organically integrates mechanical sealing, material protection, and electronic intelligent control technology to form a closed-loop, systematic safety solution, comprehensively improving the adaptability and safety level of beauty devices under harsh operating conditions.

[0133] 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.

[0134] 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.

[0135] 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.

[0136] 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.

[0137] 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 beauty device electrical system with double waterproof sealing and charging interface protection, characterized in that, include: The main body of the beauty device has a double-layer sealing structure. The outer layer is a waterproof outer layer composed of a head shell and a main body shell. The inner layer is a sealed cavity formed by a main body shell, a head liner, a head shell, and a main body shell. The sealed cavity houses the battery and the main board PCB. The main body shell, head liner, head shell, and main body shell are assembled by a snap-fit ​​structure, and a sealing ring is embedded in the snap-fit ​​gap to form a sealing barrier. The charging interface is located on the main body of the beauty device and adopts a combination structure of waterproof rubber plug and metal dustproof mesh. The waterproof rubber plug automatically pops open during charging and resets and seals after power is cut off. The inside of the charging interface is coated with a moisture-proof coating. An insulating layer is provided between the battery and the motherboard PCB; A humidity sensor is installed in a sealed cavity and electrically connected to the motherboard PCB to monitor humidity data in the sealed cavity in real time. The power control module is electrically connected to the motherboard PCB. When the humidity sensor detects that the humidity data exceeds a preset threshold, the power control module automatically disconnects the battery from the motherboard PCB.

2. The electrical system of the beauty device with double waterproof sealing and charging interface protection according to claim 1, characterized in that, The motherboard PCB is equipped with an intelligent humidity trend prediction module, which is configured as follows: Receive real-time humidity data collected by a humidity sensor at a preset frequency and store it as sequence data containing timestamps; The sliding window algorithm is used to segment the sequence data, and the mean humidity, variance and linear regression slope in each window are calculated. The linear regression slope is compared with a preset humidity rise rate threshold, and the current window mean is compared with the preset humidity threshold. When the slope exceeds the threshold and the mean reaches the threshold, a pre-alarm signal is sent to the power control module, triggering the buzzer to sound, and a prompt message is generated and displayed on the beauty device screen.

3. The electrical system of the beauty device with double waterproof sealing and charging interface protection according to claim 1, characterized in that, The charging interface is equipped with a metal contact sensor and a miniature stepper motor, and the motherboard PCB is configured as follows: When the metal contact sensor detects the insertion of the charging head, it sends an insertion trigger signal to the motherboard PCB. After receiving the signal, the motherboard PCB controls the stepper motor to rotate 180 degrees forward, and pulls the waterproof rubber plug to fully open along the preset track through the linkage mechanism; During the charging process, the charging current is monitored in real time by the current detection circuit. When the current drops below 10mA and remains below 10 for 10 seconds, the charging is considered complete. Control the stepper motor to rotate 180 degrees in reverse, push the waterproof rubber plug back to its original position, until the rubber plug is completely in contact with the edge of the charging interface.

4. The electrical system of the beauty device with double waterproof sealing and charging interface protection according to claim 1, characterized in that, A miniature pressure sensor is installed inside the outer sealing structure, and a double-layer sealing status diagnostic module is installed on the mainboard PCB, configured as follows: The pressure sensor collects the air pressure data of the outer sealing cavity in real time and sends it to the motherboard PCB; Compare the air pressure data with the preset normal sealing air pressure range; When the air pressure exceeds the normal sealing air pressure range, it is judged that the outer seal has failed, a fault signal is sent to the power control module, the connection between the battery and the main board PCB is cut off, and the fault code is displayed on the beauty device indicator light. The fault type, occurrence time, and pressure curve of the outer seal failure are stored in the built-in memory.

5. The electrical system of the beauty device with double waterproof sealing and charging interface protection according to claim 1, characterized in that, The motherboard PCB is equipped with a "fault classification and processing module", which is configured as follows: Humidity sensor data is divided into three levels: mild anomaly, moderate anomaly, and severe anomaly. The humidity sensor data corresponding to mild anomaly is lower than that corresponding to moderate anomaly, and the humidity sensor data corresponding to moderate anomaly is lower than that corresponding to severe anomaly. In case of mild abnormalities, only the high-power components of the beauty device are shut down, while the control circuit remains operational; In the event of a moderate malfunction, all functional circuits are disconnected, leaving only the humidity sensor and power control module running, triggering a continuous buzzer sound. In the event of a severe malfunction, the power control module completely disconnects the battery output and generates a warning message to the preset user terminal.

6. The electrical system of the beauty device with double waterproof sealing and charging interface protection according to claim 1, characterized in that, The motherboard PCB is equipped with an adaptive power management module, which is configured as follows: It receives humidity sensor data and temperature sensor data, and inputs them into a pre-trained humidity-power mapping model; The humidity-power mapping model outputs the target power and controls the DC-DC converter to reduce the output voltage from the normal operating voltage to the minimum safe voltage, thereby reducing the overall power consumption of the motherboard PCB. Reacquire humidity data. If the rate of decrease of the humidity data is greater than the preset rate of decrease, restore the output voltage to the normal operating voltage. If the rate of increase of the humidity data is greater than the preset rate of increase, the output voltage will be reduced to the minimum safe voltage until the humidity stabilizes or the power-off protection is triggered.

7. The electrical system of the beauty device with double waterproof sealing and charging interface protection according to claim 1, characterized in that, The main body of the beauty device is equipped with a touch screen and a Bluetooth module, and the mainboard PCB is configured as follows: Humidity data, pressure data, and charging interface status are combined into a status data package; A sealing performance curve is generated based on the status data packet, and the sealing performance curve includes the humidity change trend corresponding to a preset time range; When excessive humidity is detected based on the sealing performance curve, a humidity exceeding the limit warning is generated; Upon receiving a sealing test command that triggers a humidity over-limit warning, the motherboard PCB controls the humidity sensor to continuously collect multiple humidity data points and generates a sealing test result based on these data points.

8. The electrical system of the beauty device with double waterproof sealing and charging interface protection according to claim 1, characterized in that, The motherboard PCB has a non-volatile memory module configured as follows: Record detailed information for each humidity exceeding the limit event, including the time of occurrence, current humidity value, temperature value, charging interface status, and user operation information; Record the number of times the charging port is plugged in and unplugged each time, as well as the time.

9. The electrical system of the beauty device with double waterproof sealing and charging interface protection according to claim 1, characterized in that, The motherboard PCB has a Wi-Fi module configured as follows: According to preset sending rules, device health data is sent to the cloud server. This data includes average humidity, average pressure, number of failures, and number of charging cycles. The cloud server analyzes the device health data using a clustering algorithm to identify high-frequency sealing failure scenarios, including incomplete reset of the rubber stopper after charging. When the cloud generates an optimized humidity trend prediction model, an upgrade command is sent to the beauty device. After receiving the instruction, the beauty device downloads the upgrade package corresponding to the humidity trend prediction model, verifies its integrity, replaces the installed humidity trend prediction model, and restarts to complete the upgrade.

10. The electrical system of the beauty device with double waterproof sealing and charging interface protection according to claim 1, characterized in that, The inner sealing structure has a micro push rod mechanism at the snap-fit ​​point for adjusting the snap-fit ​​preload. The motherboard PCB is configured as follows: The system receives temperature sensor data and inputs it into the temperature-preload model, which is trained based on the thermal expansion coefficient of the sealing ring and the mechanical properties of the snap-fit. The temperature-preload model outputs a target preload, controlling the push rod mechanism to extend by 0.5mm, increasing the squeezing force of the buckle on the sealing ring; when the temperature returns to the normal range, the push rod mechanism is controlled to retract to the initial position, restoring the initial preload; humidity data is acquired through a humidity sensor to monitor the adjusted sealing performance; if the humidity data meets the preset humidity range, the current preload is maintained; if the humidity data does not meet the preset humidity range, the push rod stroke is adjusted.

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