An electric toothbrush with oral phototherapy sterilization and tissue repair functions

Abstract

The present application relates to the technical field of electric toothbrush, and disclose a kind of electric toothbrush with oral cavity phototherapy sterilization and tissue repair function, comprising: machine body component, including machine body shell, power module, control unit and high-frequency vibration motor are installed in the inner cavity of machine body shell, the one end of machine body shell is provided with power supply coupling primary coil, the outer circle of power supply coupling primary coil is installed with power supply coupling primary coil;Brush head assembly, brush head assembly is detachably connected with machine body component by power supply coupling primary coil.In the present application, for the technical defects that traditional electric toothbrush is difficult to access gingival groove, tooth gap and other cleaning dead angle, cannot effectively inhibit the breeding of pathogenic bacteria, by integrating single, optical spectrum phototherapy module and mechanical cleaning function deeply, can carry out synchronous irradiation to bristle gap and gingival groove area using specific wavelength light source while bristle carries out physical cleaning.

Description

Technical Field

[0001] This invention relates to the field of electric toothbrush technology, specifically to an electric toothbrush that combines oral phototherapy sterilization and tissue repair functions. Background Technology

[0002] As a mainstream tool in oral care, electric toothbrushes rely on the physical action of mechanical vibration or rotation. Through the impact of water flow generated by high-frequency oscillation and the friction between the bristles and the tooth surface, they mechanically remove plaque and perform initial cleaning of food debris. This cleaning mode is highly effective in removing visible stains and reducing soft plaque buildup, especially in areas easily missed by manual brushing, such as the interproximal surfaces and gingival sulcus. Therefore, it has become the first choice for most consumers' daily dental care.

[0003] However, existing electric toothbrushes struggle to reach hard-to-reach areas such as the gingival sulcus and interdental spaces, leading to the persistent presence and proliferation of pathogenic bacteria such as Porphyromonas gingivalis and Streptococcus mutans. These bacteria are major biological factors causing tooth decay, gingivitis, and periodontitis, and simple mechanical friction cannot effectively inhibit or kill them. For existing gingival inflammation, oral mucosal damage, or post-periodontal surgery wounds, traditional electric toothbrushes can only provide gentle cleaning and lack the bio-regulatory capabilities to promote cell metabolism, accelerate collagen synthesis, or reduce deep tissue inflammation, thus failing to meet the needs of active oral tissue repair. Based on this, the present invention designs an electric toothbrush that combines oral phototherapy sterilization and tissue repair functions to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide an electric toothbrush that combines oral phototherapy sterilization and tissue repair functions, thus solving the problem in the prior art that it cannot meet the needs of active repair of oral tissues.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: An electric toothbrush that combines oral phototherapy sterilization and tissue repair functions includes: The machine body assembly includes a machine body shell. A power module, a control unit, and a high-frequency vibration motor are installed in the inner cavity of the machine body shell. A power supply coupling primary coil is provided at one end of the machine body shell, and a power supply coupling primary coil is installed on the outer ring of the power supply coupling primary coil. The machine body shell also integrates a wireless communication module for realizing encrypted data transmission and interconnection between the device and a mobile terminal APP.

[0006] The brush head assembly is detachably connected to the body assembly via a power supply coupling primary coil. The brush head assembly includes a brush head body with a bristle carrier on its top. Cleaning bristles are fixed to the bristle carrier using a bristle implantation process. The output end of the high-frequency vibration motor is fixedly connected to the brush head assembly via an eccentric shaft. A miniature optical sensor, an auxiliary light unit, and a high-transparency optical protective window are integrated at a preset position on the brush head body. The optical sensor is used to acquire high-definition image information of key areas in the oral cavity, such as the tooth surface, gum line, and tongue coating. The auxiliary light unit provides a uniform, glare-free light source for imaging within the oral cavity. The high-transparency optical protective window is made of medical-grade high-transparency material and is seamlessly sealed to the brush head body to ensure waterproof and moisture-proof performance.

[0007] The single-spectrum phototherapy module includes a first LED light source and a second LED light source emitting different center wavelengths. The brush head body is also provided with a power supply line. One end of the power supply line is electrically connected to the single-spectrum phototherapy module, and the other end is connected to the gold-plated contact pin at the tail of the brush head assembly. The single-spectrum phototherapy module can also be powered by a wireless coupling coil for non-contact power supply. The wireless induction coil supplies power to the first LED light source and the second LED light source after rectification.

[0008] Preferably, it also includes an AI-assisted diagnostic module, which includes an optical image acquisition unit, a data transmission unit, an AI algorithm processing unit, and a result feedback unit, for the purpose of assisting in the diagnosis of oral diseases and generating personalized care suggestions.

[0009] The oral cavity image data collected by the optical sensor is encrypted and transmitted to an external mobile terminal APP through the wireless communication module, or directly integrated with the AI ​​diagnostic algorithm module; it receives the oral disease auxiliary diagnostic results (including but not limited to tooth decay warning, gingival inflammation judgment, tongue coating abnormality analysis, dental plaque distribution identification, etc.) and personalized care suggestions generated by the APP based on AI big data analysis, or directly outputs the diagnostic results through the built-in AI algorithm; it adaptively adjusts the spectral parameters of the phototherapy module and the vibration intensity of the motor according to the diagnostic results to achieve intelligent linkage between "diagnosis and care".

[0010] Preferably, the control unit is electrically connected to the mono- and spectral phototherapy module and the high-frequency vibration motor, and is configured to control the mono- and spectral phototherapy module to emit light waves corresponding to the sterilization function, tissue repair function and halitosis removal function, and to control the cooperative working mode of the mono- and spectral phototherapy module and the high-frequency vibration motor.

[0011] Preferably, the front end of the brush head body is also equipped with an optical focusing structure, so that the light emission direction of the single-spectrum phototherapy module is directed towards the cleaning bristle side and the back of the brush head body, respectively, forming a bidirectional irradiation structure.

[0012] Preferably, the single-spectrum phototherapy module comprises two sets, which are located inside the brush head body and the body assembly, respectively. The first LED light source and the second LED light source located in the brush head body are evenly distributed along the circumference of the bristle carrier, with an adjacent light source spacing of 2-5mm. The first LED light source and the second LED light source located in the body assembly are evenly distributed along the circumference of the power supply coupling primary coil.

[0013] Preferably, the surface of the outer casing is equipped with a mode selection button for selecting the working mode, including "sterilization and deodorization", "deep anti-inflammatory", "teeth whitening", "compound care mode", AI diagnosis mode and enhancement button. The surface of the outer casing is also equipped with a working status display screen for displaying the working mode, intensity, AI diagnosis progress and core result prompts, etc.

[0014] As can be seen from the above technical solutions, the AI ​​diagnostic algorithm is trained based on a massive amount of clinical samples of oral diseases. The accuracy rate of auxiliary diagnosis for common oral problems is ≥88% (among which the accuracy rate of caries identification is ≥90%, the accuracy rate of gingival inflammation identification is ≥93%, and the accuracy rate of tongue coating abnormality analysis is ≥85%). It can generate a visual diagnostic report (marking abnormal areas, risk levels, and intervention suggestions), and supports historical data storage and trend analysis. Users can check the changes in their oral health at any time. At the same time, the APP has data encryption storage function to protect user privacy and security.

[0015] Preferably, the power supply method includes wired gold-plated wire power supply or wireless inductive coupling power supply. When wired power supply is used, the power supply line uses gold-plated wire with a wire diameter of 0.1-0.3mm, and the gold-plated contacts and the primary coil of the power supply coupling are gold-plated spring sheet structures with a gold plating layer thickness ≥0.3μm. When wireless power supply is used, the secondary coil of the power supply induction is installed in a preset position on the brush head, and the primary coil is installed in the inner cavity of the body assembly. After inductive coupling rectification and filtering, the first LED and second LED light source, optical sensor and auxiliary light unit of the brush head are powered.

[0016] The exposed portions of the single-spectrum phototherapy module and the power supply line are encapsulated by a transparent sealant layer, which is medical-grade liquid silicone with a hardness of 30-70HA.

[0017] Preferably, both the brush head body and the body assembly are provided with heat conduction channels to match the heat dissipation areas of the spectral phototherapy module and the optical sensor. The heat conduction channels are filled with heat-conducting buffer materials (such as heat-conducting silicone pads or ceramic heat-conducting materials) with a thermal conductivity ≥0.8W / (m·K) to ensure that the temperature of the device is ≤45℃ during operation and to avoid burns to the oral mucosa.

[0018] Preferably, the control unit further includes a user status perception module, including a pressure sensor and an optical sensor installed on the top of the brush head assembly and the body assembly. The pressure sensor monitors the brushing pressure in real time to avoid over-cleaning and damaging the gums; the optical sensor can help identify the brushing area (such as distinguishing between hard tooth tissue and soft gum tissue), providing contextual data support for control logic and AI diagnosis.

[0019] Preferably, the body assembly further includes a first LED spectrum light source power supply pin and a second LED spectrum light source power supply pin, and the brush head assembly further includes a brush head guide rod for forming a light guiding path. A brush bristle body is installed at the end of the brush head guide rod, and a first optical focusing structure and a second optical focusing structure are installed on one side of the brush bristle body. A power supply coupling secondary coil is also installed on one side of the brush head guide rod, and an optical sensor is installed on the other side of the brush head guide rod. An auxiliary light is installed around the outer ring of the optical sensor, and an optical protective window is installed at one end of the brush head guide rod.

[0020] Preferably, the optical focusing structure is a focusing lens and a light guide plate disposed at the front end of the brush head; the auxiliary light unit is a micro LED array emitting 450-650nm visible light, and the light intensity can be adaptively adjusted according to the oral environment (500-1500 lux) to avoid strong light stimulation; the optical sensor is a micro CMOS sensor with ≥8 million pixels, an imaging spectrum range of 400-760nm, and supports autofocus to ensure clear acquisition of minute lesion features; the toothbrush is used with mouthwash and toothpaste containing photosensitizers, and the photosensitizers are 0.05%-0.3% by mass of porphyrin, phthalocyanine, and phenothiazine compounds, wherein porphyrin photosensitizers generate singlet oxygen under 410nm light source activation, and phthalocyanine photosensitizers function under 630-690nm light source activation, which can effectively kill different types of oral pathogens and form a precise synergistic bactericidal effect with the phototherapy module.

[0021] Compared with the prior art, the beneficial effects achieved by the present invention are: 1. In this invention, the technical shortcomings of traditional electric toothbrushes, such as difficulty in reaching cleaning dead spots like the gingival sulcus and interdental spaces, and the inability to effectively inhibit the growth of pathogenic bacteria, are addressed by deeply integrating single-mode, single-spectrum phototherapy modules with mechanical cleaning functions. This allows for simultaneous irradiation of the bristle gaps and gingival sulcus areas using specific wavelength light sources while the bristles perform physical cleaning. This synergistic "cleaning and sterilization" working mode achieves photodynamic inhibition or killing of residual pathogenic bacteria that are difficult to completely remove mechanically while physically removing plaque. This reduces the biological factors that cause tooth decay and gingivitis from the source, overcoming the limitations of single mechanical cleaning.

[0022] 2. In this invention, addressing the problem that traditional electric toothbrushes lack the ability to promote active tissue repair, a single-wavelength, single-spectrum phototherapy module is integrated to emit specific wavelengths of red and near-infrared light. These light waves can be absorbed by the mitochondria of oral soft tissue cells, promoting cell metabolism and energy synthesis, thereby accelerating fibroblast proliferation and collagen synthesis, and shortening the healing time of oral mucosa or gingival wounds; at the same time, the phototherapy of specific wavelengths also has the effect of reducing deep tissue inflammatory responses.

[0023] 3. In this invention, the control unit enables intelligent combination and switching of multiple working modes, including phototherapy and cleaning, allowing users to select the appropriate mode according to different needs. The control unit can precisely regulate the switching, power, timing, and coordination with motor vibration of different light sources, achieving segmented care that first soothes and then repairs, or dynamically adjusting parameters based on pressure sensor feedback. This flexible and precise collaborative control logic allows a single device to adapt to various oral health scenarios, significantly improving the targeted nature of care and the user experience.

[0024] 4. This invention innovatively integrates an "optical sensor + auxiliary light unit + AI big data diagnosis" module, filling the technological gap in traditional electric toothbrushes that lack health monitoring and auxiliary diagnostic functions: Through a high-definition optical sensor built into the brush head, images of key areas are directly collected in the oral cavity, and the auxiliary light unit addresses the problem of insufficient lighting in the oral cavity, ensuring image quality; through a wireless communication module and a mobile terminal APP, a well-trained AI algorithm is used to assist in the diagnosis of common oral diseases, enabling early warning of problems such as tooth decay and gingivitis, preventing disease progression; the diagnostic results can be directly linked to the device's phototherapy and cleaning functions to generate personalized care plans, achieving a full-chain oral health management system of "cleaning-monitoring-diagnosis-care," significantly improving the product's technological added value and user usability.

[0025] 5. In this invention, the design of the AI ​​diagnostic function takes into account both safety and practicality. The optical sensor and auxiliary light unit adopt medical-grade sealed packaging, which is waterproof, moisture-proof, non-toxic and harmless. The data transmission process is encrypted to protect user privacy. The AI ​​diagnostic results are clearly marked with the "assisted diagnosis" attribute to avoid misleading users, while providing medical advice to ensure reasonable management of health risks. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the brush head assembly of the present invention; Figure 2 This is a schematic diagram of the structure of the body components of the present invention; Figure 3 This is a schematic cross-sectional view of the brush head assembly of the present invention; Figure 4 This is a schematic cross-sectional view of the body components of the present invention; Figure 5 This is an exploded view of the structure of the present invention; Figure 6 This is a cross-sectional view of the body components of the present invention; Figure 7 This is a structural diagram of the brush head assembly according to Scheme 2 of the present invention; Figure 8 This is a structural diagram of the body components of Scheme 2 of the present invention.

[0027] The components include: 1. Brush head assembly; 2. Body assembly; 3. Single-spectrum phototherapy module; 4. Brush head body; 5. Interlocking gold-plated contacts; 6. Power supply circuit; 7. Cleaning bristles; 8. Eccentric shaft; 9. High-frequency vibration motor; 10. Control unit; 11. Power module; 13. Power supply coupling primary coil; 14. Power supply coupling primary coil; 15. Working status display screen; 16. Mode selection button; 17. Body shell; 19. First LED spectrum light source power supply contact pin; 20. Second LED spectrum light source power supply contact pin; 21. Brush bristle body; 22. First optical focusing structure; 23. Brush head guide rod; 24. Second optical focusing structure; 25. Power supply coupling secondary coil; 26. Optical sensor; 27. Auxiliary light. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1; Please see Figures 1-8 An electric toothbrush that combines oral phototherapy sterilization and tissue repair functions is characterized by comprising: The body assembly 2 includes a body shell 17. A power module 11, a control unit 10, and a high-frequency vibration motor 9 are installed in the inner cavity of the body shell 17. A power supply coupling primary coil 13 is provided at one end of the body shell 17. A power supply coupling primary coil 14 is installed on the outer ring of the power supply coupling primary coil 13. A Bluetooth 5.0 wireless communication module is also integrated inside the body shell 17 for data transmission.

[0030] Brush head assembly 1 is detachably connected to body assembly 2 via power supply coupling primary coil 13; brush head assembly 1 includes brush head body 4, a bristle carrier is provided on the top of brush head body 4, cleaning bristles 7 are fixed on the bristle carrier by bristle implantation process, and the output end of high frequency vibration motor 9 is fixedly connected to brush head assembly 1 via an eccentric shaft 8. The single-spectrum phototherapy module 3 includes a first LED light source and a second LED light source that emit different center wavelengths. The brush head body 4 is also equipped with a power supply line 6. One end of the power supply line 6 is electrically connected to the single-spectrum phototherapy module 3, and the other end is connected to the gold-plated contact 5 located at the tail of the brush head assembly 1.

[0031] The control unit 10 is electrically connected to the single-spectrum phototherapy module 3 and the high-frequency vibration motor 9, and is configured to control the single-spectrum phototherapy module 3 to emit light waves corresponding to the sterilization function, tissue repair function and halitosis removal function, and to control the cooperative working mode of the single-spectrum phototherapy module 3 and the high-frequency vibration motor 9.

[0032] The front end of the brush head body 4 is also equipped with an optical focusing structure, so that the light emission direction of the single-spectrum phototherapy module 3 is directed towards the cleaning bristles 7 and the back of the brush head body 4, respectively, forming a bidirectional irradiation structure.

[0033] The single-spectrum phototherapy module 3 has two sets, which are located inside the brush head body 4 and the body assembly 2 respectively. The first LED light source and the second LED light source located in the brush head body 4 are evenly distributed along the circumference of the brush bristle carrier, and the distance between adjacent light sources is 2-5mm. The first LED light source and the second LED light source located in the body assembly 2 are evenly distributed along the circumference of the power supply coupling primary coil 13.

[0034] The surface of the housing 17 is equipped with a mode selection button 16 for selecting the working mode, and the surface of the housing 17 is also equipped with a working status display screen 15 for displaying the status.

[0035] The power supply line 6 uses gold-plated wires with a diameter of 0.1-0.3mm. The gold-plated contact 5 and the primary coil 13 for power supply coupling are gold-plated spring structures with a gold plating layer thickness ≥0.3μm. The exposed parts of the single-spectrum phototherapy module 3 and the power supply line 6 are encapsulated by a transparent sealing layer. The transparent sealing layer is medical-grade liquid silicone with a hardness of 30-70HA.

[0036] Both the brush head body 4 and the body assembly 2 have heat conduction channels inside, which are used to match the heat dissipation area of ​​the single-spectrum phototherapy module 3. The heat conduction channels are filled with heat conduction buffer material with a thermal conductivity ≥0.8W / (m·K).

[0037] The working principle of this embodiment of the invention is as follows: when the user turns on the device by pressing the mode selection button 16, the control unit 10 starts the high-frequency vibration motor 9 and the single-spectrum phototherapy module 3 simultaneously or in a preset sequence according to the selected mode.

[0038] The power module 11 supplies power to the control unit 10 and the high-frequency vibration motor 9. The motor control module in the control unit 10 drives the high-frequency vibration motor 9 to work. Its output end transmits high-frequency vibration to the brush head assembly 1, which is fixedly connected to it, through the eccentric shaft 8, driving the cleaning bristles 7 to perform reciprocating or rotating motion to achieve mechanical cleaning of the tooth surface.

[0039] Meanwhile, the LED control module in the control unit 10 is electrically connected to the primary coil 13 of the body assembly 2 via the gold-plated contact 5 at the tail of the brush head assembly 1, supplying power to the single-spectrum phototherapy module 3 integrated in the brush head body 4. This module contains at least two sets of LED light sources emitting different center wavelengths, such as a first LED light source and a second LED light source. The control unit 10 precisely controls the on / off state, power, and irradiation duration of each light source. After the light is emitted from the light source, it is guided and focused by the optical focusing structure at the front end of the brush head body 4, forming a bidirectional irradiation structure that irradiates the teeth and gingival sulcus towards the cleaning bristles 7 side and the gums and oral mucosa towards the back of the brush head body 4.

[0040] In this mode, mechanical cleaning and phototherapy functions are performed simultaneously. In the "daily cleaning + sterilization" mode, the motor drives the brush bristles to clean the tooth surface, while a blue light source, such as the first LED light source, emits light to synchronously and photodynamically kill pathogens in the cleaned area, and may also stimulate plaque fluorescence to assist the user in observation. The cleaning and treatment process is completed under the unified control of the control unit 10, and the user can achieve integrated care of cleaning and basic phototherapy in a single operation.

[0041] Example 2; Please see Figures 1-8 In this embodiment of the invention, the control unit 10 further includes a user status sensing module, which includes a pressure sensor and an optical sensor installed on the top of the brush head assembly 1 and the body assembly 2.

[0042] The optical focusing structure consists of a convex lens, a Fresnel lens, and a light guide plate located at the front end of the brush head.

[0043] The toothbrush is used with mouthwash and toothpaste containing photosensitizers, which are porphyrin, phthalocyanine and phenothiazine compounds with a mass fraction of 0.05%-0.3%.

[0044] The working principle of this embodiment of the invention is as follows: The user status sensing module integrated in the control unit 10 of Scheme 1, including a pressure sensor and an optical sensor, begins to operate. The pressure sensor monitors the pressure of the brush head on the teeth and gums in real time during brushing. If the pressure exceeds a preset safety threshold, the control unit 10 can immediately instruct the motor control module to reduce the speed of the high-frequency vibration motor 9, or even briefly pause the vibration. Simultaneously, it may adjust the light power of the phototherapy module to avoid mechanical damage or photothermal stimulation to the gums. The optical sensor can assist in identifying the brushing area, such as distinguishing between hard tooth tissue and soft gum tissue, providing feedback for the control logic.

[0045] The optical focusing structure specifically comprises a combination of a convex lens, a Fresnel lens, and a light guide plate located at the front end of the brush head. This design more efficiently collects and redistributes the light emitted by the LED light source, optimizes the light spot shape and energy density, and ensures that the light power effectively targets areas such as the gingival sulcus and interdental spaces, improving sterilization and repair efficiency. Specifically, when the "bad breath removal" mode is selected, the control unit 10 activates a second LED light source with a specific wavelength, such as 530nm-590nm yellow-green light. This light source works synergistically with the user's pre-used mouthwash or toothpaste containing 0.05%-0.3% by mass of porphyrin, phthalocyanine, or phenothiazine photosensitizers. The photosensitizers are activated under specific wavelength light, producing highly reactive singlet oxygen and other substances that effectively kill odor-causing bacteria in the mouth, such as *Porphyromonas gingivalis*, and decompose odor sources such as volatile sulfur compounds, thereby achieving the function of eliminating bad breath at its source.

[0046] In Scheme Two, where the light source is integrated into the body, the core difference in its working principle lies in the light transmission path. In this scheme, the first LED spectrum light source power supply pin 19 and the second LED spectrum light source power supply pin 20 are located inside the body assembly 2. The light emitted by the light source is not directly generated within the brush head, but is conducted through the brush head guide rod 23 of the brush head assembly 1. The brush head guide rod 23 is made of a highly transparent material, forming the light transmission path from the body to the front end of the brush head. The light undergoes total internal reflection or scattering within the guide rod, reaching the power supply coupling secondary coil 25 at the end, and then is focused and directed by the first optical focusing structure 22 and the second optical focusing structure 24, ultimately illuminating the target area of ​​the oral cavity. In this scheme, the brush head assembly 1 itself does not contain an electronic light source, resulting in a simpler structure, easier replacement, and waterproof sealing; however, it relies on a high-precision light guide structure to ensure light transmission efficiency.

[0047] Example 3; Please see Figures 1-8In this embodiment of the invention, the body assembly 2 further includes a first LED spectrum light source power supply pin 19 and a second LED spectrum light source power supply pin 20. The brush head assembly 1 further includes a brush head guide rod 23 for forming a light guiding path. A bristle body 21 is installed at the end of the brush head guide rod 23. A first optical focusing structure 22 and a second optical focusing structure 24 are also installed on one side of the bristle body 21. A power supply coupling secondary coil 25 is also installed on one side of the brush head guide rod 23. An optical sensor 26 is also installed on the other side of the brush head guide rod 23. An auxiliary light 27 is installed around the outer ring of the optical sensor 26. An optical protective window 28 is also installed at one end of the brush head guide rod 23.

[0048] The working principle of this embodiment is as follows: This embodiment focuses on the refined working logic of the device in stages and multi-spectral collaboration under complex nursing needs, such as postoperative repair or deep anti-inflammatory treatment, and integrates the sensing function of Embodiment 2.

[0049] When the user selects a mode such as "Sensitive Repair" or "Post-operative Care," the control unit 10 executes a preset multi-stage collaborative program. For example, in "Segmented Repair Mode," the device first initiates low-speed cleaning combined with yellow light irradiation for 1-2 minutes. This stage aims to soothe sensitive gums using the gentle properties of yellow light, promote local microcirculation, and prepare for subsequent treatment. Subsequently, the control unit 10 automatically switches to the second stage: increasing the power of red or near-infrared light, and may adjust the motor to enter a gentler cleaning mode or stop cleaning altogether. Red and near-infrared light can penetrate deeper tissues, significantly enhancing the activity of mitochondria, promoting ATP synthesis, accelerating fibroblast proliferation and collagen production, thereby deeply reducing inflammation and promoting the repair and healing of oral soft tissues.

[0050] Throughout the entire operation, especially when high-power red or near-infrared light sources operate for extended periods, the generated heat is conducted through the substrate of the single-spectrum phototherapy module 3 to the pre-installed heat-conducting channels inside the brush head body 4 and the main body assembly 2. The heat-conducting buffer material filling these channels rapidly diffuses the heat, forming an efficient heat dissipation path of "light source - heat-conducting material - body," ensuring that the temperature of the light source surface and the brush head portion in contact with the oral cavity remains within a safe range (e.g., ≤45℃). Simultaneously, the fault detection module within the control unit 10 continuously monitors the current in each light source circuit, and the overcurrent protection module safeguards the entire circuit, ensuring electrical safety under any abnormal conditions.

[0051] On the other side of the brush head guide rod 23, there is also an optical sensor 26 and an auxiliary light 27. The optical sensor 26 is used to collect high-definition image information of key areas such as the tooth surface, gum margin, and tongue coating in the oral cavity. The auxiliary light 27 is used to provide a uniform and glare-free light source for shooting in the oral cavity. The optical protective window 28 is made of medical-grade high light transmittance material and is seamlessly sealed with the brush head guide rod 23 to ensure waterproof and moisture-proof performance.

[0052] In Option 1, an electrical signal directly drives the light source inside the brush head to emit light through contacts; in Option 2, an electrical signal drives the light source inside the device to emit light, and the light signal is transmitted through a physical light guide structure. Both options are controlled by the same control unit 10, which coordinates the motor vibration, the switching, power, timing, and safety protection mechanisms of each spectral light source according to the user-selected mode. This ultimately achieves precise temporal and spatial synergy between "mechanical cleaning" and "multi-spectral phototherapy," completing multi-dimensional oral care from superficial cleaning and sterilization to deep tissue repair.

[0053] Working principle: After the user starts the device and selects the corresponding working mode via the mode selection button 16, the control unit 10 activates the high-frequency vibration motor 9 and the single-spectrum phototherapy module 3 synchronously or in a specific sequence according to the preset program. In terms of mechanical cleaning, the high-frequency vibration motor 9 transmits power to the brush head assembly 1 through the eccentric shaft 8, driving the cleaning bristles 7 to perform high-frequency vibration or rotation, physically removing dental plaque and food debris.

[0054] Simultaneously, the multispectral phototherapy function is activated. According to two preferred embodiments of the present invention, the phototherapy implementation paths differ, but both are controlled by the same control unit 10. In the first embodiment, the light source brush head is integrated, and the single-spectrum phototherapy module 3, integrated within the brush head body 4, contains at least two different wavelength LED light sources. These LEDs receive power through the power supply line 6 and interlocking gold-plated contacts 5 and 13, emitting light directly. After being shaped by an optical focusing structure such as a lens or light guide plate at the front end of the brush head, the light forms bidirectional irradiation towards both the bristle side and the gingival side, directly acting on the target area of ​​the oral cavity. In the second embodiment, the light source body is integrated and guided, and the LED light source group is disposed inside the body component 2, such as the first LED spectrum light source power supply contact 19 and the second LED spectrum light source power supply contact 20. The light emitted by the light source undergoes total internal reflection through the highly transparent brush head guide rod 23, and is then focused and emitted through the optical focusing structures 22 and 24 at the front end of the brush head, ultimately achieving bidirectional irradiation as well. The two schemes differ only in the physical path of light transmission; the biological effects and control logic of the phototherapy are completely consistent.

[0055] The core of the control unit 10 lies in its collaborative control logic. It can independently and precisely control the switching on and off of each wavelength light source, the power through stepless PWM adjustment, and the irradiation duration, and can be linked with the motor speed and start / stop. In the "segmented repair" mode, yellow light can be activated first to soothe tissues, and then automatically switched to red light and near-infrared light for deep anti-inflammatory and repair promotion. The motor may be adjusted to a gentler cleaning mode or paused simultaneously. In addition, the control unit 10 can also integrate user status sensing modules such as pressure sensors to provide real-time feedback on brushing pressure or area, and dynamically adjust the motor speed and light power to improve safety and comfort.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electric toothbrush that combines oral phototherapy sterilization and tissue repair functions, characterized in that, include: The body assembly (2) includes a body shell (17), in which a power module (11), a control unit (10) and a high-frequency vibration motor (9) are installed. A power supply coupling primary coil (13) is provided at one end of the body shell (17), and a power supply coupling primary coil (14) is installed on the outer ring of the power supply coupling primary coil (13). The brush head assembly (1) is detachably connected to the body assembly (2) via a power supply coupling primary coil (13); the brush head assembly (1) includes a brush head body (4), the top of the brush head body (4) is provided with a bristle carrier, and cleaning bristles (7) are fixed on the bristle carrier by a bristle implantation process; the output end of the high-frequency vibration motor (9) is fixedly connected to the brush head assembly (1) via an eccentric shaft (8). The single-spectrum phototherapy module (3) includes a first LED light source and a second LED light source that emit different center wavelengths. The brush head body (4) is also provided with a power supply line (6). One end of the power supply line (6) is electrically connected to the single-spectrum phototherapy module (3), and the other end is connected to the gold-plated contact (5) at the tail of the brush head assembly (1).

2. An electric toothbrush with both oral phototherapy sterilization and tissue repair functions as described in claim 1, characterized in that: The control unit (10) is electrically connected to the mono- and spectral phototherapy module (3) and the high-frequency vibration motor (9), and is configured to control the mono- and spectral phototherapy module (3) to emit light waves corresponding to the sterilization function, tissue repair function and halitosis removal function, and control the cooperative working mode of the mono- and spectral phototherapy module (3) and the high-frequency vibration motor (9).

3. An electric toothbrush with both oral phototherapy sterilization and tissue repair functions as described in claim 1, characterized in that: The front end of the brush head body (4) is also equipped with an optical focusing structure, so that the light emission direction of the single-spectrum phototherapy module (3) is directed toward the cleaning bristles (7) side and the back of the brush head body (4) respectively, forming a bidirectional irradiation structure.

4. An electric toothbrush with both oral phototherapy sterilization and tissue repair functions as described in claim 1, characterized in that: The single-spectrum phototherapy module (3) has two sets, which are located inside the brush head body (4) and the body assembly (2) respectively. The first LED light source and the second LED light source located in the brush head body (4) are evenly distributed along the circumference of the brush bristle carrier, and the distance between adjacent light sources is 2-5mm. The first LED light source and the second LED light source located in the body assembly (2) are evenly distributed along the circumference of the power supply coupling primary coil (13).

5. An electric toothbrush with both oral phototherapy sterilization and tissue repair functions as described in claim 1, characterized in that: The surface of the outer casing (17) is equipped with a mode selection button (16) for selecting the working mode, and the surface of the outer casing (17) is also equipped with a working status display screen (15) for displaying the status.

6. An electric toothbrush with both oral phototherapy sterilization and tissue repair functions as described in claim 1, characterized in that: The power supply line (6) uses gold-plated wires with a diameter of 0.1-0.3mm. The gold-plated contact (5) and the primary coil (13) for power supply coupling are gold-plated spring structures with a gold-plated layer thickness ≥0.3μm. The exposed parts of the single-spectrum phototherapy module (3) and the power supply line (6) are encapsulated by a transparent sealant layer. The transparent sealant layer is medical-grade liquid silicone with a hardness of 30-70HA.

7. An electric toothbrush with both oral phototherapy sterilization and tissue repair functions as described in claim 1, characterized in that: Both the brush head body (4) and the body assembly (2) are provided with heat conduction channels for matching the heat dissipation area of ​​the single-spectrum phototherapy module (3). The heat conduction channels are filled with heat conduction buffer material with a thermal conductivity ≥0.8W / (m·K).

8. An electric toothbrush with both oral phototherapy sterilization and tissue repair functions as described in claim 1, characterized in that: The control unit (10) also includes a user status sensing module, including a pressure sensor and an optical sensor installed on top of the brush head assembly (1) and the body assembly (2).

9. An electric toothbrush with both oral phototherapy sterilization and tissue repair functions as described in claim 3, characterized in that: The body assembly (2) also includes a first LED spectrum light source power supply pin (19) and a second LED spectrum light source power supply pin (20). The brush head assembly (1) also includes a brush head guide rod (23) for forming a light guiding path. A brush bristle body (21) is installed at the end of the brush head guide rod (23). A first optical focusing structure (22) and a second optical focusing structure (24) are also installed on one side of the brush bristle body (21). A power supply coupling secondary coil (25) is also installed on one side of the brush head guide rod (23). An optical protective window (28) is also installed at one end of the brush head guide rod (23). An optical sensor (26) is also installed on the other side of the brush head guide rod (23). An auxiliary light (27) is installed on the outer ring of the optical sensor (26).

10. An electric toothbrush with both oral phototherapy sterilization and tissue repair functions as described in claim 1, characterized in that: The toothbrush is used with mouthwash and toothpaste containing a photosensitizer, wherein the photosensitizer is a porphyrin, phthalocyanine and phenothiazine compound with a mass fraction of 0.05%-0.3%.

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