Hair removal instrument power supply

Abstract

The utility model discloses a depilation instrument power supply, and relates to the technical field of depilation instruments. Comprising a shell and a DC power interface arranged at any position of the shell, a PCB is arranged in the shell, a low-voltage transformer and a high-voltage transformer are arranged on the PCB, the low-voltage transformer and the high-voltage transformer are electrically connected with the DC power interface through the PCB, and a high-voltage capacitor is further included. And the high-voltage capacitor is electrically connected with the PCB and is arranged in the shell. According to the utility model, the high-voltage capacitor is installed in the power supply of the depilation instrument, and the high-voltage capacitor is completely isolated from the handheld depilation instrument in the physical structure, so that the potential electric shock risk caused by the fact that the hand is too close to the high-voltage electrical module when a user holds and uses the depilation instrument is avoided.

Description

Technical Field

[0001] This utility model relates to the field of hair removal device technology, specifically a power supply for a hair removal device. Background Technology

[0002] In existing handheld hair removal devices, the high-voltage capacitor is usually placed inside the device's main unit. This is achieved by connecting the high-voltage boost module and the xenon lamp via the shortest path to shorten the discharge circuit and realize the hair removal function. However, while ensuring the efficiency of pulse energy release, this design can easily lead to the user's hand being extremely close to the high-voltage electrical module during holding and use. Even if the outer shell has a certain thickness of insulation protection, if the outer shell is micro-cracked or the insulation medium deteriorates due to factors such as drops, wear, aging, or moisture, the internal DC voltage of up to 300V or more is very likely to leak through the tiny path, thus causing electric shock. In addition, the local electromagnetic interference that accompanies the high-voltage pulse discharge may also radiate through the gaps in the shell, bringing additional safety hazards to the human body. Utility Model Content

[0003] The purpose of this application is to provide a technical solution to address the problems mentioned in the background section.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] A power supply for a hair removal device includes a housing and a DC power interface disposed at any location on the housing. A PCB board is disposed inside the housing, and a low-voltage transformer and a high-voltage transformer are disposed on the PCB board. The low-voltage transformer and the high-voltage transformer are electrically connected to the DC power interface through the PCB board. The device also includes a high-voltage capacitor, which is electrically connected to the PCB board disposed inside the housing.

[0006] Preferably, a warning light is also provided inside the housing, and the warning light is electrically connected to the PCB board.

[0007] Preferably, it also includes a type-c power interface disposed at any location on the housing, the type-c power interface being electrically connected to the PCB board.

[0008] Preferably, the voltage of the low-voltage transformer is 12V-18V.

[0009] Preferably, the voltage of the high-voltage transformer is 280V-450V.

[0010] Preferably, the voltage of the low-voltage transformer is 15V.

[0011] Preferably, the voltage of the high-voltage transformer is 320V.

[0012] Preferably, the air gap between the high-voltage capacitor and the PCB board is ≥2mm, and the creepage distance is ≥3.2mm.

[0013] In summary, the technical effects and advantages of this utility model are as follows:

[0014] This invention integrates a high-voltage capacitor into the power supply of the hair removal device, completely isolating the high-voltage capacitor from the handheld device in terms of physical structure. This avoids the potential risk of electric shock to the user due to close proximity of the hand to the high-voltage electrical module during handling and use. Even after prolonged use or when changes in the external environment (such as drops, wear, or moisture aging) cause a decline in the performance of the outer shell material, the hair removal device itself only carries low-voltage DC signals and has no direct electrical connection with the high-voltage energy storage module. This effectively prevents high-voltage electricity from leaking to the user's contact area through tiny cracks, thereby significantly improving overall safety.

[0015] Secondly, because the high-voltage capacitor is removed from the inside of the hair removal device and installed in the power supply, the space originally used to house the capacitor and insulation protection is freed up, allowing the main unit of the hair removal device to achieve a more compact and miniaturized design, thereby reducing its size and weight and improving portability and operating comfort. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a perspective view of the present utility model.

[0018] Figure 2 This is an exploded view of the present invention.

[0019] Figure 3 This is an exploded view of the present invention.

[0020] In the diagram: 1. Outer casing; 2. DC power interface; 3. PCB board; 4. Low-voltage transformer; 5. High-voltage transformer; 6. High-voltage capacitor; 7. Warning light; 8. Type-C power interface. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-3 A power supply for a hair removal device includes a housing 1 and a DC power interface 2 disposed at any location on the housing 1. A PCB board 3 is disposed inside the housing 1. A low-voltage transformer 4 and a high-voltage transformer 5 are disposed on the PCB board. The low-voltage transformer 4 and the high-voltage transformer 5 are electrically connected to the DC power interface 2 through the PCB board 3. The device also includes a high-voltage capacitor 6, which is electrically connected to the PCB board 3 and disposed inside the housing 1. This invention integrates a high-voltage capacitor 6 into the power supply of the hair removal device, completely isolating the capacitor 6 from the handheld device in physical structure. This avoids the potential risk of electric shock when the user's hand is too close to the high-voltage electrical module during handling and use. Even after prolonged use or when the performance of the outer shell material deteriorates due to changes in the external environment (such as drops, wear, or moisture aging), the hair removal device itself only carries low-voltage DC signals and has no direct electrical connection with the high-voltage energy storage module. This effectively prevents high-voltage electricity from leaking to the user's contact area through tiny cracks, thus significantly improving overall safety. Secondly, because the high-voltage capacitor 6 is removed from the inside of the hair removal device and installed in its power supply, the space originally used to house the capacitor and provide insulation protection is freed up. This allows for a more compact and miniaturized design of the hair removal device, reducing its size and weight, and improving portability and operational comfort.

[0023] Preferably, a warning light 7 is also provided inside the housing 1, and the warning light 7 is electrically connected to the PCB board 3. This solution, by setting a warning light 7 inside the power supply housing 1 and electrically connecting it to the PCB board 3, allows the power supply to reflect the working status of the high-voltage energy storage area in real time during device operation. The status indication of the warning light 7 can intuitively alert the user when the high and low voltage transformers are charging, discharging, or malfunctioning, thereby effectively enhancing the visual safety feedback mechanism of the power module. Compared to traditional hair removal devices that lack obvious status indicators, the warning light 7, as a simple and intuitive signal output device, can promptly remind the user to pay attention to the operating environment during the charging of the high-voltage capacitor 6 or in standby mode, preventing accidental contact with the power supply or related connecting parts before the high voltage is fully released, further improving overall safety and human-computer interaction experience. Specifically, this warning light design does not directly participate in the main circuit operation; it is independently driven by control signals, does not increase the system load, and its placement is flexible, allowing for optimized viewing angles based on the housing shape to improve the warning effect.

[0024] Preferably, the system also includes a Type-C power interface 8 located at any point on the housing 1, which is electrically connected to the PCB board 3. This solution, by introducing a Type-C power interface 8 and electrically connecting it to the PCB board 3, achieves a unified and upgraded power input standard. Compared to traditional round DC plugs, the Type-C interface has advantages such as reversibility, high current transmission, and support for standardized fast charging protocols (such as the PD protocol). It can more efficiently power the internal low-voltage transformer 4 and high-voltage transformer 5, while improving connection reliability and reducing the risk of failure due to wear from plugging and unplugging or incorrect insertion direction. Powering through the Type-C power interface 8 also enables intelligent identification and power negotiation of external adapters, allowing the power supply to flexibly adapt to voltage and current under different power supply conditions, optimizing charging rate and safety protection parameters. This helps improve the overall system's compatibility and adaptability, making it particularly suitable for the lightweight, ease-of-use, and internationally compatible requirements of portable hair removal devices.

[0025] Preferably, the voltage of the low-voltage transformer 4 is 12V-18V. Setting the low-voltage transformer 4 within the 12V-18V range is an optimal choice based on the overall system performance and safety. Within this voltage range, it ensures sufficient driving energy for components such as the existing low-voltage control circuit, fan, and MCU, while maintaining a good electrical insulation safety margin, avoiding electrical stress on small control chips and interface circuits due to excessive voltage. Furthermore, the 12V-18V power supply range facilitates the downstream circuitry to generate common low voltages such as 5V or 3.3V through simple step-down modules (such as LDOs or BUCK DC-DC converters), reducing system complexity and energy loss caused by multi-stage power switching, and further improving the conversion efficiency and operational stability of the overall power system.

[0026] Preferably, the voltage of the high-voltage transformer 5 is 280V-450V. Setting the high-voltage transformer 5 within the 280V-450V range improves the accuracy of the energy storage level required for the xenon lamp's flash discharge. This range provides sufficient voltage for charging the high-voltage capacitor, ensuring ample light energy output during a single pulse release, thereby achieving effective thermal destruction of the hair follicle. Simultaneously, this voltage range is controlled within the safe limits that the xenon lamp and high-voltage capacitor materials can withstand, avoiding the risk of reduced lifespan of energy storage components, insulation breakdown, or ignition failure due to excessively high voltage. This solution, by precisely setting the high-voltage output range, balances the energy density requirements of the hair removal pulse with the long-term reliability of the system, meeting the comprehensive requirements of home hair removal devices for safety, performance consistency, and durability.

[0027] Preferably, the low-voltage transformer 4 has a voltage of 15V. Setting the output voltage of the low-voltage transformer 4 to 15V in this design improves the balance between system load characteristics and power conversion efficiency in practical applications. The 15V voltage can stably supply low-voltage electronic modules such as fan motors, microcontrollers, and display units in existing technologies. Furthermore, when designing a boost converter, 15V as the input can be efficiently boosted to over 300V with a suitable voltage ratio and low power consumption during the boost phase, helping to control overall heat generation and energy loss in the power module. In addition, the 15V input has good compatibility with PD fast charging protocols, protection circuits, and interface standardization, simplifying external adapter specification management and improving the consistency of the entire system.

[0028] Preferably, the voltage of the high-voltage transformer 5 is 320V. Setting the output voltage of the high-voltage transformer 5 to 320V improves the energy storage efficiency of the xenon flash lamp used for hair removal. 320V serves as the target charging voltage for the energy storage capacitor, ensuring sufficient energy release per pulse for efficient hair removal while also providing enough margin to meet the capacitor's typical rated voltage (400V-450V), preventing device failure due to overcharging. Furthermore, at 320V, the entire high-voltage energy storage-discharge system can achieve a faster charge-discharge cycle, facilitating continuous operation and improving processing speed and efficiency. This solution, fixed at 320V, also simplifies the high-voltage control strategy, stabilizes the xenon lamp ignition conditions, ensures uniform energy output for each pulse, and enhances user experience and equipment lifespan.

[0029] Preferably, the air gap between the high-voltage capacitor 6 and the PCB board 3 is greater than or equal to 2mm, and the creepage distance is greater than or equal to 3.2mm. In this design, specifying an air gap ≥ 2.0mm and a creepage distance ≥ 3.2mm effectively suppresses electrical breakdown, surface flashover, and leakage current, providing basic insulation protection. The air gap primarily addresses the risk of direct breakdown caused by high electric field strength in air between two conductors with different potentials. During high-voltage pulse release or capacitor charging / discharging, if the physical distance between the two conductors is insufficient, local electric field concentration will cause air molecules to ionize, forming an arc discharge, which can lead to short circuits or device burnout. Therefore, setting a minimum air gap of 2.0mm ensures that even under 320V to 450V DC high-voltage conditions, local... The electric field strength is still below the critical ionization threshold of air insulation, thus effectively avoiding spontaneous discharge. The creepage distance of ≥3.2mm is the minimum control set for surface discharge of the insulation. When two conductors with different potentials form a potential leakage path along the insulation surface, especially in high humidity, high dust, and high pollution environments, the surface resistance of the insulation decreases. If the creepage path is too short, the charge is easy to slide along the surface and form a breakdown discharge or current leakage, leading to insulation failure or safety accidents. Therefore, by ensuring that the creepage distance is at least 3.2mm, the length of the surface electrical leakage path can be significantly increased, the electric field dispersion capability can be improved, the voltage gradient per unit length can be reduced, and the insulation reliability in pollution-resistant environments can be enhanced.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A depilating instrument power supply, comprising a housing, and a DC power supply interface arranged at any position of the housing, a PCB board is arranged in the housing, a low-voltage transformer and a high-voltage transformer are arranged on the PCB board, the low-voltage transformer and the high-voltage transformer are electrically connected with the DC power supply interface through the PCB board, characterized in that: Further comprising a high-voltage capacitor, which is electrically connected with the PCB board arranged in the shell. ​ 2. The epilator power supply according to claim 1, characterized in that: Further comprising a warning light arranged in the shell, which is electrically connected with the PCB board.

3. The epilator power supply according to claim 1, characterized in that: Further comprising a type-c power interface arranged at any position of the shell, which is electrically connected with the PCB board.

4. The epilator power supply according to claim 1, characterized in that: The low-voltage transformer has a voltage of 12V-18V.

5. The epilator power supply according to claim 1, characterized in that: The high-voltage transformer has a voltage of 280V-450V.

6. The epilator power supply according to claim 4, characterized in that: The low-voltage transformer has a voltage of 15V.

7. The epilator power supply according to claim 5, characterized in that: The high-voltage transformer has a voltage of 320V.

8. The epilatory device power supply of claim 1, wherein: The air gap between the high-voltage capacitor and the PCB board is greater than or equal to 2mm, and the creepage distance is greater than or equal to 3.2mm.

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