Control circuit and electric toothbrush

Abstract

The utility model provides a control circuit and an electric toothbrush, which are applied to the electric toothbrush, and the control circuit comprises a power supply circuit, an information acquisition circuit, a motor driving circuit, a main control circuit, a pressure sensing lamp circuit and a Bluetooth communication circuit. The operation state of the electric toothbrush is monitored in real time, the operation state comprises the pressure applied during tooth brushing, when it is detected that the pressure exceeds the safety threshold value, a user is prompted to adjust the force through tactile feedback and optical warning, and gingival injury and tooth hard tissue abrasion caused by excessive pressure are avoided. Meanwhile, a motor driving circuit is adopted to drive a motor to form sound wave vibration, so that water flow and toothpaste foam form micro jet flow which permeates into blind areas such as tooth slits and gingival sulcus which are difficult to cover by a traditional vibration type scheme, the dental plaque removal rate is increased, and the risk of caries and periodontal diseases is reduced. In addition, the operation state information of the electric toothbrush is synchronized to the mobile terminal through the Bluetooth communication circuit, and the user is helped to establish a scientific tooth brushing habit.

Description

Technical Field

[0001] This utility model relates to the field of oral hygiene technology, and in particular to a control circuit and an electric toothbrush. Background Technology

[0002] With the widespread adoption of personal care electronic devices, electric toothbrushes, as frequently used oral care tools, have seen their functional integration and user experience optimization become key areas for product upgrades. Currently, traditional electric toothbrushes lack pressure sensing structures, making it impossible for users to intuitively perceive brushing force. When applying pressure by feel, it is easy to use too much force, which may lead to bleeding gums, gum recession, and even enamel wear with long-term use. This violates the gentle principle of the "Bass brushing technique." When excessive pressure is applied, the bristles are pressed tightly against the tooth surface, which actually reduces the range of motion of the bristles and weakens the cleaning effect.

[0003] Furthermore, the mainstream technology in the current electric toothbrush industry is still dominated by mechanical rotation or basic vibration cleaning solutions, which rely on the physical friction between the bristles and the tooth surface to achieve cleaning. Traditional mechanical toothbrushes rely on direct contact friction between the bristles, and the cleaning range is limited to the physical contact area of ​​the brush head. The vibration frequency is singular, and it cannot drive water flow and foam to penetrate into the gaps between teeth and the gingival sulcus through high-frequency vibration, resulting in poor cleaning effect on hidden areas. Utility Model Content

[0004] The main purpose of this invention is to propose a control circuit and an electric toothbrush, which aims to solve the problem of gum damage caused by the lack of pressure feedback mechanism in traditional electric toothbrushes, which prevents users from sensing excessive force, as well as the low cleaning efficiency of basic vibration cleaning solutions.

[0005] To address the aforementioned problems, this application proposes a control circuit for use in an electric toothbrush, wherein the electric toothbrush includes a motor, and the control circuit includes:

[0006] Power supply circuit, used to process the input power supply and output it;

[0007] An information acquisition circuit is used to acquire and output the operating status information of the electric toothbrush, wherein the operating status information includes a first electrical signal, which is converted from the acquired pressure signal;

[0008] A motor drive circuit, with its output terminal connected to the controlled terminal of the motor, is used to drive the motor to work and provide acoustic vibration.

[0009] The main control circuit is connected to the output terminal of the information acquisition circuit and the input terminal of the motor drive circuit. It is used to receive the operating status information output by the information acquisition circuit and output a corresponding first control signal to the motor drive circuit according to the first electrical signal, so as to control the motor to enter the preset overvoltage mode.

[0010] The pressure-sensing lamp circuit has its input terminal connected to the main control circuit. The main control circuit is also used to output a corresponding first driving signal to the pressure-sensing lamp circuit according to the first electrical signal, so that the pressure-sensing lamp circuit responds to the first driving signal and works.

[0011] A Bluetooth communication circuit is provided for the main control circuit to communicate with the mobile terminal via Bluetooth; wherein, the main control circuit is also used to send the received operating status information to the mobile terminal through the Bluetooth communication circuit.

[0012] In one embodiment, the information acquisition circuit includes:

[0013] The pressure sensing circuit, with its output terminal connected to the main control circuit, is used to collect pressure signals, convert them into a first electrical signal, and output them to the main control circuit.

[0014] The gyroscope circuit, with its output connected to the main control circuit, is used to collect the position information and movement trajectory of the electric toothbrush and output them to the main control circuit.

[0015] In one embodiment, the electric toothbrush further includes a toothbrush head, and the pressure sensing circuit includes:

[0016] A pressure sensor switch is installed inside the toothbrush head. One end of the pressure sensor switch is connected to the pressure input terminal of the main control circuit, and the other end is grounded. The pressure sensor switch is used to detect the pressure of the toothbrush head contacting the teeth and outputs a first electrical signal to the main control circuit when triggered.

[0017] In one embodiment, the Bluetooth communication circuit includes:

[0018] Antennas are used to transmit or receive signals;

[0019] The signal transceiver circuit, connected to the antenna and the main control circuit, is used to modulate the operating status information of the main control circuit into a radio frequency signal or to convert the received signal into an electrical signal and output it to the main control circuit.

[0020] In one embodiment, the Bluetooth communication circuit and the main control circuit are integrated into the same chip.

[0021] In one embodiment, it further includes:

[0022] A power switch circuit, connected to the main control circuit, is used to output a corresponding second electrical signal to the main control circuit when operated by the user.

[0023] The main control circuit is used to receive and output a corresponding second control signal to the motor drive circuit according to the second electrical signal of the power switch circuit, so as to control the motor to enter the corresponding working mode.

[0024] In one embodiment, it further includes:

[0025] A data storage circuit, connected to the main control circuit, is used to store the operating status information received by the main control circuit.

[0026] In one embodiment, the power supply circuit includes:

[0027] Charging circuit, used to process the power supply of the connected power source;

[0028] A voltage conversion circuit, with its input terminal connected to the charging circuit, is used to convert the power output from the charging circuit into a first voltage output.

[0029] In addition, this application also proposes an electric toothbrush, including a battery, a motor, and a control circuit as described above.

[0030] In one embodiment of an electric toothbrush, it further includes:

[0031] The control circuit, battery, and motor are housed within the handle.

[0032] A toothbrush head, which is detachably mounted at one end of the handle.

[0033] This application uses an information acquisition circuit to monitor the electric toothbrush's operating status in real time, including the pressure applied during brushing. When the pressure exceeds a safe threshold, the main control circuit triggers the motor to enter a preset overpressure mode and simultaneously activates a pressure-sensing light circuit to emit a warning light effect. This process provides tactile feedback and optical warnings to prompt the user to adjust the pressure, preventing excessive pressure that could damage gums and wear down tooth structure. Simultaneously, this application uses a motor drive circuit to drive the motor to generate sonic vibrations, creating micro-jet streams of water and toothpaste foam that penetrate into areas difficult to reach with traditional vibration-based methods, such as between teeth and the gingival sulcus, thus improving plaque removal efficiency and reducing the risk of cavities and periodontal disease. Furthermore, this application uses a Bluetooth communication circuit to synchronize the electric toothbrush's operating status information to a mobile terminal, helping users establish scientific brushing habits. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0035] Figure 1 This is a structural diagram of a control circuit according to the present invention.

[0036] Figure 2 This is a circuit diagram of a control circuit according to the present invention.

[0037] Reference numerals: Power supply circuit 01, Charging circuit 11, Voltage conversion circuit 12, Information acquisition circuit 02, Pressure sensing circuit 21, Gyroscope circuit 22, Motor drive circuit 03, Main control circuit 04, Pressure sensing lamp circuit 05, Bluetooth communication circuit 06, Power switch circuit 07, Data storage circuit 08.

[0038] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0039] 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.

[0040] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0041] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0042] To address the aforementioned problems, this application proposes a control circuit for use in an electric toothbrush, wherein the electric toothbrush includes a motor, and the control circuit includes:

[0043] Power supply circuit 01 is used to process the input power supply and then output it.

[0044] Information acquisition circuit 02 is used to acquire and output the operating status information of the electric toothbrush, wherein the operating status information includes a first electrical signal, which is converted from the acquired pressure signal;

[0045] Motor drive circuit 03, with its output terminal connected to the controlled terminal of the motor, is used to drive the motor to work and provide acoustic vibration;

[0046] The main control circuit 04 is connected to the output terminal of the information acquisition circuit 02 and the input terminal of the motor drive circuit 03. It is used to receive the operating status information output by the information acquisition circuit 02 and output a corresponding first control signal to the motor drive circuit 03 according to the first electrical signal, so as to control the motor to enter the preset overvoltage mode.

[0047] The pressure-sensing lamp circuit 05 has its input terminal connected to the main control circuit 04. The main control circuit 04 is also used to output a corresponding first driving signal to the pressure-sensing lamp circuit 05 according to the first electrical signal, so that the pressure-sensing lamp circuit 05 responds to the first driving signal and works.

[0048] Bluetooth communication circuit 06 is used for Bluetooth communication between the main control circuit 04 and the mobile terminal; wherein, the main control circuit 04 is also used to send the received operating status information to the mobile terminal through the Bluetooth communication circuit 06.

[0049] Specifically, the technological iteration of the electric toothbrush industry has long been constrained by traditional motor manufacturing thinking. Early rotary motors, with their simple structure and controllable cost, became the mainstream solution for market adoption. However, this technological inertia led manufacturers to over-focus on "how to improve physical friction efficiency," neglecting the possibility of "non-contact cleaning." While sonic vibration technology has emerged, its R&D investment and market education costs are high, leading some companies to prefer marginal improvements within existing frameworks (such as increasing bristle density and optimizing brush head shape) rather than disruptive innovation. Consumers' intuitive understanding of "cleaning power" is often simplified to "bristle hardness" or "vibration intensity." This cognitive bias is exploited by some manufacturers who promote concepts like "super-strong vibration" and "deep stain removal" to reinforce the pursuit of aggressive cleaning.

[0050] In reality, excessively pursuing high physical friction intensity not only damages oral soft tissues but can also lead to a precipitous drop in cleaning efficiency due to rapid bristle wear. The lack of market education has resulted in users' insufficient perception of the value of advanced features such as "scientific gum care" and "fluid cleaning," indirectly slowing down technological upgrades. Upgrading electric toothbrushes involves the integration of technologies from multiple fields, including precision motors, sensors, and algorithms. For example, the sensitivity of miniature pressure sensors needs to be balanced with waterproofing requirements, power consumption control of high-frequency motors relies on breakthroughs in battery technology, and dynamic adjustment algorithms require support from clinical oral medicine data. Currently, the industry has not yet formed a cross-disciplinary collaborative innovation ecosystem; individual manufacturers are often limited by their own technological accumulation, making it difficult to systematically overcome technological bottlenecks.

[0051] As user demands evolve, the technological challenges facing electric toothbrushes are becoming increasingly apparent. Traditional electric toothbrushes are designed with a "one-way cleaning action" logic, lacking the ability to perceive and respond to user actions. For example, most products do not integrate pressure sensing modules, preventing users from intuitively sensing brushing force. When the brush head excessively presses against the tooth surface, the bristles bend and deform, drastically reducing the effective oscillation range and thus lowering cleaning efficiency. More seriously, prolonged excessive pressure can accelerate gum recession, inducing dentin hypersensitivity and even wedge-shaped defects. Mechanical brush heads have a fixed movement trajectory, only acting on the tooth surface area directly in contact with the bristles. For non-planar structures such as interdental spaces and gingival sulci, especially the concave areas of the occlusal surface of posterior teeth, the bristles cannot fully conform, resulting in persistent cleaning blind spots. Traditional vibration modes generally have low frequencies (typically in the thousands of times per minute) and cannot generate a hydrodynamic effect through high-frequency vibration. Toothpaste foam and water flow can only passively adhere to the bristle surface, lacking penetrating flow and failing to penetrate hidden areas to break down plaque.

[0052] Therefore, this application proposes a control circuit for an electric toothbrush, including a power supply circuit, an information acquisition circuit 02, a motor drive circuit 03, a main control circuit 04, a pressure sensor circuit 05, and a Bluetooth communication circuit 06. The power supply circuit processes the battery power before outputting it. These processing steps are crucial for ensuring a stable power supply to subsequent circuits. A stable power supply is the cornerstone of the normal operation of an electric toothbrush. Especially in precision control applications such as sonic vibration, even small voltage fluctuations can affect the motor's vibration frequency and amplitude, thus impacting the cleaning effect.

[0053] The information acquisition circuit 02 is used to collect and output the operating status information of the electric toothbrush. The operating status information includes a first electrical signal, which is converted from the collected pressure signal. In this application, the information acquisition circuit 02 includes a pressure sensing circuit 21 and a gyroscope circuit 22. The pressure sensing circuit 21 collects the pressure signal applied by the user during brushing using a built-in sensor (such as a piezoresistive sensor or a capacitive sensor). These signals are converted into a first electrical signal and output to the main control circuit 04 for processing. In addition, the information acquisition circuit 02 can also collect other operating status information of the electric toothbrush, such as motor speed and battery level, and output this information in the form of electrical signals. Pressure sensing addresses the problem that users cannot intuitively perceive the brushing force. Traditional electric toothbrushes lack pressure sensing capabilities, making it impossible to intervene in time or quantify the risk of damage when the user applies excessive force. Through the information acquisition circuit 02, the electric toothbrush can continuously interact with the user through environmental perception, dynamically adjusting its working state to achieve a precise balance between cleaning efficiency and tissue protection. The main control circuit 04 is connected to the output terminal of the information acquisition circuit 02 and the input terminal of the motor drive circuit 03. When the pressure exceeds the safety threshold, the main control circuit 04 outputs a corresponding first control signal to the motor drive circuit 03 to trigger the motor to enter the preset overpressure mode. On the other hand, it outputs a corresponding first drive signal to the pressure sensing lamp circuit 05 to trigger the pressure sensing lamp circuit 05 to emit a warning light effect.

[0054] The motor drive circuit 03, with its output connected to the controlled end of the motor, drives the motor to provide acoustic vibration. The motor drive circuit 03 is the core of the acoustic vibration technology, its technological value lying in overcoming the rigid limitations of traditional motor control modes. Early rotary motors relied on simple open-loop control, providing only fixed-frequency mechanical motion, while acoustic vibration requires the motor to achieve precise amplitude and frequency modulation at high frequencies of tens of thousands of times per minute. This high-frequency vibration enables water flow and toothpaste foam to form microjets, penetrating into blind spots such as interdental spaces and gingival sulci that are difficult to cover with traditional vibration methods, more effectively breaking down plaque and tartar while reducing physical wear on teeth and gums. The motor drive circuit 03 can precisely control the vibration intensity, direction, and frequency of the motor by changing the duty cycle (i.e., the proportion of high-level signals) and phase difference (i.e., the time difference between two or more signals) of the drive signal. When the main control circuit 04 sends the first control signal, the drive circuit can automatically adjust the output waveform parameters to control the motor to enter a preset overvoltage mode. Preferably, the preset overpressure mode is a rapid pulse vibration of the toothbrush head controlled by the motor, allowing the user to intuitively feel the change in the toothbrush head's vibration and thus receive tactile feedback to adjust the pressure. The motor drive circuit 03 of this application has four functions: forward rotation, reverse rotation, stop, and brake. It also has a built-in temperature protection function; the internal circuit will shut down when the temperature is too high.

[0055] The pressure-sensing light circuit 05 has its input terminal connected to the main control circuit 04. The main control circuit 04 is also used to output a corresponding first drive signal to the pressure-sensing light circuit 05 according to the first electrical signal, so that the pressure-sensing light circuit 05 responds to the first drive signal and operates. When users apply excessive pressure in pursuit of a "strong cleaning feeling," traditional products lack intuitive warning methods, leading to the solidification of incorrect usage habits. This circuit includes an LED light, which is controlled to light up by the first drive signal output by the main control circuit 04. In this application, the LED light in the pressure-sensing light circuit 05 is placed in a different location from other indicator lights to avoid confusion. At the same time, the pressure-sensing light circuit 05 uses a red LED light to form a strong warning signal. This multimodal feedback mechanism not only intervenes in incorrect operation in real time, but also helps users establish muscle memory for scientific force application through long-term behavioral training, helping users establish scientific brushing habits.

[0056] Furthermore, this application also includes a Bluetooth communication circuit 06 for Bluetooth communication between the main control circuit 04 and the mobile terminal; wherein, the main control circuit 04 is also used to send the received operating status information to the mobile terminal through the Bluetooth communication circuit 06. The Bluetooth communication circuit 06 acts as a "bridge" between the electric toothbrush and the mobile terminal, ensuring stable and efficient communication between them. Through the Bluetooth communication circuit 06, the main control circuit 04 can send the received electric toothbrush operating status information to the mobile terminal, such as a mobile phone or tablet, in real time. This information includes, but is not limited to, the first electrical signal converted from the pressure signal, the motor speed, and the battery level, which together constitute the electric toothbrush's "health record." Users only need to install the corresponding application on the mobile terminal to easily view the real-time operating status of the electric toothbrush. No matter where they are, users can use mobile devices such as mobile phones to understand the working status of the electric toothbrush at any time, thus making more reasonable usage arrangements. For example, when the electric toothbrush's battery is low, the mobile terminal will promptly remind the user to charge it, avoiding the embarrassing situation of running out of power during use. Furthermore, the Bluetooth communication circuit 06 enables remote control of the electric toothbrush. Users can remotely set and control the electric toothbrush via an application on their mobile device, such as adjusting the working mode and viewing historical data. This design not only enhances the intelligence level of the electric toothbrush but also provides users with a more personalized experience.

[0057] This application uses an information acquisition circuit 02 to monitor the electric toothbrush's operating status in real time, including the pressure applied during brushing. When the pressure exceeds a safe threshold, the main control circuit 04 triggers the motor to enter a preset overpressure mode and simultaneously activates the pressure-sensing light circuit 05 to emit a warning light effect. This process provides tactile feedback and optical warnings to prompt the user to adjust the pressure, preventing excessive pressure that could damage gums and abrade tooth tissues. Simultaneously, this application uses a motor drive circuit 03 to drive the motor to generate sonic vibrations, causing water and toothpaste foam to form micro-jet streams that penetrate into areas difficult to reach with traditional vibration methods, such as between teeth and the gingival sulcus, improving plaque removal rates and reducing the risk of cavities and periodontal disease. Furthermore, this application uses a Bluetooth communication circuit 06 to synchronize the electric toothbrush's operating status information to a mobile terminal, helping users establish scientific brushing habits.

[0058] In one embodiment, such as Figure 2 As shown, the information acquisition circuit 02 includes:

[0059] The pressure sensing circuit 21, with its output connected to the main control circuit 04, is used to collect pressure signals, convert them into a first electrical signal, and output it to the main control circuit 04. The pressure sensing circuit 21 is an important component of the information acquisition circuit 02, and its output is directly connected to the main control circuit 04. The core function of this circuit is to collect the pressure signals experienced by the electric toothbrush during use; these signals mainly originate from the contact between the brush head and the teeth. Through its built-in sensor, the pressure sensing circuit 21 can accurately capture these minute pressure changes and convert them into a first electrical signal that is easy to process and transmit. These first electrical signals are then sent to the main control circuit 04 for subsequent intelligent analysis and control.

[0060] The gyroscope circuit 22, with its output connected to the main control circuit 04, is used to collect the position information and motion trajectory of the electric toothbrush and output this information to the main control circuit 04. The gyroscope circuit 22 is also an integral part of the information acquisition circuit 02, and its output is directly connected to the main control circuit 04. The main function of the gyroscope circuit 22 is to collect the position information and motion trajectory of the electric toothbrush. Through its built-in gyroscope sensor, this circuit can monitor the electric toothbrush's attitude changes in space in real time, including key data such as rotation angle and acceleration. This data is crucial for evaluating the way the electric toothbrush is used, optimizing cleaning effects, and improving the user experience. The gyroscope circuit 22 converts this position information and motion trajectory into electrical signals and sends them to the main control circuit 04 for further processing and analysis.

[0061] Through the coordinated operation of these two circuits, the information acquisition circuit 02 can comprehensively and accurately capture various status information of the electric toothbrush during operation. This information not only helps to improve the intelligence level of the electric toothbrush, but also provides users with a more personalized and precise cleaning experience. For example, when the pressure sensing circuit 21 detects excessive pressure, the main control circuit 04 can immediately trigger the pressure protection mechanism to avoid damage to teeth and gums; while the gyroscope circuit 22 can help users understand the cleaning trajectory of the electric toothbrush, thereby optimizing the cleaning strategy and improving cleaning efficiency.

[0062] In one embodiment, the electric toothbrush further includes a toothbrush head, and the pressure sensing circuit 21 includes:

[0063] A pressure sensor switch is used to detect the pressure of the toothbrush head contacting the teeth and outputs a first electrical signal to the main control circuit 04 when triggered. This device is typically integrated into the toothbrush head in an embedded structure, positioned close to the bristle roots. Its spatial arrangement is designed to ensure the sensor can directly sense the mechanical changes generated when the bristles contact the teeth. Its function is to detect pressure changes when the toothbrush head contacts the teeth. One end of the pressure sensor switch is connected to the pressure input terminal of the main control circuit 04, and the other end is grounded, thus constructing a complete signal transmission loop. When the contact pressure applied by the user during brushing reaches a preset threshold, the internal mechanical structure or sensitive element of the sensor will undergo physical deformation, triggering a change in the switch state, thereby generating an electrical signal with specific characteristics. This signal is transmitted to the core processor of the main control circuit 04, forming a key input parameter for closed-loop feedback control, thus realizing real-time dynamic monitoring of brushing pressure. More specifically, in this embodiment, the pressure-sensing light circuit 05 is installed on the handle of the electric toothbrush, and the preset pressure threshold is 200g~400g. When the toothbrush head is subjected to pressure of 200g~400g, the first electrical signal is output to the main control circuit 04, the pressure-sensing light circuit 05 on the handle lights up red, and the toothbrush head vibrates rapidly with pulses (250Hz 50% / 260Hz 70% pulse vibration, switching every 200ms). Through tactile feedback and optical warnings, the user is prompted to adjust the pressure to avoid excessive pressure that could cause gum damage and wear on the hard tissues of the teeth.

[0064] In one embodiment, the Bluetooth communication circuit 06 includes:

[0065] An antenna is used to transmit or receive signals; it is responsible for transmitting or receiving radio frequency (RF) signals. When an electric toothbrush communicates with a mobile terminal via Bluetooth, the antenna can capture weak RF signals in the air and convert them into electrical signals for processing by the signal transceiver circuit. Similarly, when the antenna receives RF signals from the signal transceiver circuit, it transmits these signals into the air so that the mobile terminal can receive them. The signal transceiver circuit, connected to the antenna and the main control circuit 04, is used to modulate the operating status information of the main control circuit 04 into RF signals or convert received signals into electrical signals and output them to the main control circuit 04.

[0066] The signal transceiver circuit is closely connected to both the antenna and the main control circuit 04. Its primary function is to modulate the operating status information output from the main control circuit 04 into a radio frequency (RF) signal for transmission via the antenna. Simultaneously, the signal transceiver circuit converts the RF signal received by the antenna into an electrical signal, which is then output to the main control circuit 04 for further processing. During modulation, the signal transceiver circuit encodes, encrypts, and modulates the operating status information output from the main control circuit 04 to ensure accuracy and security. During demodulation, the signal transceiver circuit decodes, decrypts, and demodulates the received RF signal to recover the original operating status information. Through the coordinated operation of the antenna and the signal transceiver circuit, the Bluetooth communication circuit 06 of the electric toothbrush ensures stable and efficient communication with mobile terminals. This allows users to view the real-time operating status of the electric toothbrush anytime, anywhere via mobile devices such as smartphones, enabling more informed usage decisions. Furthermore, the Bluetooth communication circuit 06 also enables remote control of the electric toothbrush, further enhancing the user experience.

[0067] In one embodiment, the Bluetooth communication circuit 06 and the main control circuit 04 are integrated on the same chip. Integrating the Bluetooth communication circuit 06 and the main control circuit 04 on the same chip significantly improves the device's integration level. This highly integrated design reduces the number of components on the circuit board, lowers manufacturing costs, and helps reduce the device's size, making it more compact and lightweight. This is particularly important for devices requiring portability, such as electric toothbrushes. The integrated design also helps reduce the device's power consumption. Implementing Bluetooth communication and main control functions on the same chip reduces data transmission power consumption between chips and optimizes power management strategies. This extends battery life and improves the user experience for devices like electric toothbrushes that require long standby times or frequent use. Integrating the Bluetooth communication circuit 06 and the main control circuit 04 on the same chip also enhances the device's reliability. The highly integrated design reduces connection points between chips, lowering the failure rate due to poor or loose connections. Simultaneously, this design also helps improve the device's anti-interference capabilities, ensuring stable operation even in complex environments.

[0068] In one embodiment, it further includes:

[0069] A power switch circuit 07, connected to the main control circuit 04, outputs a corresponding second electrical signal to the main control circuit 04 when operated by the user. The main control circuit 04 receives the second electrical signal from the power switch circuit 07 and outputs a corresponding second control signal to the motor drive circuit 03 to control the motor to enter the corresponding operating mode. The power switch circuit 07 is designed for user convenience; the user only needs to operate the power switch to trigger the circuit to output the corresponding second electrical signal to the main control circuit 04. After receiving the second electrical signal from the power switch circuit 07, the main control circuit 04 quickly outputs the corresponding second control signal to the motor drive circuit 03 according to preset logic rules. Upon receiving the second control signal from the main control circuit 04, the motor drive circuit 03 immediately adjusts the motor's operating state to enter the corresponding operating mode. For example, when the user starts the electric toothbrush via the power switch, the motor quickly starts and enters the normal cleaning mode; a second operation will switch the motor to whitening mode, massage mode, etc. The power switch circuit 07 makes the power on / off and operating mode switching of the electric toothbrush intuitive and easy to operate, improving the user experience. Whether it's starting, turning off, or adjusting the brushing mode, users can easily achieve these tasks with simple operations, thus enjoying a more comfortable and efficient brushing experience.

[0070] In one embodiment, the control circuit further includes an indicator light circuit connected to the main control circuit 04, used to display the working status of the electric toothbrush; the main control circuit 04 is also used to receive and output a corresponding second drive signal to the indicator light circuit according to the second electrical signal of the power switch circuit 07, controlling the indicator light circuit to work. The motor's working mode includes multiple working modes, and the indicator light circuit includes multiple LEDs, with each working mode corresponding to one LED of the indicator light circuit; the main control circuit 04 is also used to output a corresponding second control signal to the motor drive circuit 03 each time it receives the second electrical signal from the power switch circuit 07, to control the motor to enter the next working mode in a preset order, and to output a corresponding second drive signal to the LED corresponding to the current working mode of the motor. More specifically, the main control chip embeds a configurable state machine, and each valid operation triggers a cyclic switching of modes.

[0071] In particular, the motor features multiple operating modes, each corresponding to a different vibration frequency and intensity, designed to provide users with a more refined and enriching cleaning experience. To clearly display the current motor operating mode, an indicator light circuit is integrated into the electric toothbrush. This circuit consists of multiple LEDs, each corresponding to a specific operating mode of the motor. When the user selects a particular operating mode, the corresponding LED illuminates, clearly informing the user of the motor's current status.

[0072] More specifically, the motor's operating modes, in a preset sequence, include: 1. White (whitening mode): white light, 260Hz vibration frequency, 31,200 vibrations / minute, duty cycle 75%. 2. Clean (cleaning mode): white light, 310Hz vibration frequency, 37,200 vibrations / minute, duty cycle 50%. 3. Soft (gentle and sensitive mode): white light, 250Hz vibration frequency, 30,000 vibrations / minute, duty cycle 30%. 4. Gum care (massage and health care mode, wave cycle every 4-5 seconds): white light, 340Hz vibration frequency, 40,800 vibrations / minute, duty cycle 20%~70% linearly cycling. 5. Smart Mode (Smart Custom Mode): White light indicates that users can customize brushing style, intensity, and time via the app. Brushing style options include 4 choices; intensity levels range from 1 to 9; and time intervals range from 2 to 4 minutes, for a total of 5 time periods. The indicator light circuit enhances the interactivity of the electric toothbrush, allowing users to clearly understand the current operating mode and improving the user experience through visual feedback. Whether a first-time user or an experienced user, the intuitive display of the indicator light circuit allows for easy monitoring of the electric toothbrush's operating status.

[0073] In one embodiment, it further includes:

[0074] The data storage circuit 08, connected to the main control circuit 04, stores the operating status information received by the main control circuit 04. As a crucial component within the electric toothbrush, the data storage circuit 08 is closely integrated with the main control circuit 04. Its primary task is to receive and store the operating status information collected by the main control circuit 04 from various sensors (such as the pressure sensing circuit 21 and the gyroscope circuit 22). This information includes, but is not limited to, key data such as the electric toothbrush's real-time pressure data, movement trajectory, battery level, and motor speed. Through the data storage circuit 08, the electric toothbrush can save this operating status information, forming a complete "health record." These records are extremely valuable to users because they not only help users understand their electric toothbrush usage at any time but also provide personalized cleaning suggestions and optimization plans. For example, by analyzing the electric toothbrush's usage data, users can understand which areas are not cleaned thoroughly enough, thereby adjusting their cleaning strategy and improving cleaning efficiency.

[0075] Furthermore, the data storage circuit 08 boasts high reliability and stability, ensuring that stored information is not lost due to power outages or other unforeseen circumstances. This means that even when the user is not connected to a mobile device or external power source, the electric toothbrush can autonomously save its operating status information, providing users with a more reassuring user experience.

[0076] In one embodiment, the power supply circuit includes:

[0077] The charging circuit 11 is used to process the power supply. In this embodiment, the charging circuit 11 uses built-in OVP (overvoltage protection) to ensure that when the input voltage exceeds the safe range (e.g., 30V), the charging circuit 11 will automatically cut off the power supply to prevent damage to the electric toothbrush. This is a crucial step in ensuring the safe use of the electric toothbrush. The charging circuit 11 supports charging currents up to 1A, meaning the electric toothbrush can charge its battery faster, reducing user waiting time. Simultaneously, its programmable nature allows the charging current to be adjusted according to actual conditions to adapt to different charging needs and battery states. Furthermore, it allows users or the system to start or stop the charging process via control signals. For example, when the electric toothbrush battery is fully charged or in a protected state, the charging circuit 11 can be disabled to avoid unnecessary energy waste or safety hazards.

[0078] The voltage conversion circuit 12, with its input terminal connected to the charging circuit 11, converts the power output from the charging circuit 11 into a first voltage output. The main function of the voltage conversion circuit 12 is to convert the power output from the charging circuit 11 into a first voltage suitable for the various components of the electric toothbrush. This conversion process ensures that all circuit modules inside the electric toothbrush receive a stable and suitable voltage supply for normal operation. Through the coordinated operation of the charging circuit 11 and the voltage conversion circuit 12, the power circuit of the electric toothbrush provides users with an efficient and safe charging experience, while ensuring stable performance of the electric toothbrush under various usage scenarios.

[0079] Furthermore, this application also proposes an electric toothbrush, including a battery, a motor, and the control circuit described above. The control circuit includes a power supply circuit, an information acquisition circuit 02, a motor drive circuit 03, a main control circuit 04, a pressure-sensing light circuit 05, and a Bluetooth communication circuit 06. This application uses the information acquisition circuit 02 to monitor the electric toothbrush's operating status in real time, including the pressure applied during brushing. When the pressure exceeds a safe threshold, the main control circuit 04 triggers the motor to enter a preset overpressure mode and simultaneously triggers the pressure-sensing light circuit 05 to emit a warning light effect. This process provides tactile feedback and optical warnings to prompt the user to adjust the pressure, avoiding excessive pressure that could damage the gums and abrade the tooth structure. Simultaneously, this application uses the motor drive circuit 03 to drive the motor to generate sonic vibrations, causing the water flow and toothpaste foam to form micro-jet streams that penetrate into areas difficult to reach with traditional vibration methods, such as between teeth and the gingival sulcus, improving plaque removal efficiency and reducing the risk of caries and periodontal disease. In addition, this application uses the Bluetooth communication circuit 06 to synchronize the electric toothbrush's operating status information to a mobile terminal, helping users establish scientific brushing habits.

[0080] In one embodiment of an electric toothbrush, it further includes:

[0081] The control circuit, battery, and motor are housed within the handle; the toothbrush head is detachably mounted at one end of the handle. By integrating the control circuit, battery, and motor into the handle, and employing a detachable toothbrush head design, electric toothbrushes become easier to maintain and upgrade. Traditional electric toothbrushes, due to their highly integrated design, often require complete disposal when the bristles wear down or the battery ages. The modular design allows for independent replacement of worn parts—the brush head only needs to be rotated to remove it when its lifespan ends, and the battery compartment uses a sliding rail design for user-friendly replacement, significantly reducing operating costs and e-waste generation. The handle, as a long-term platform, can continuously improve performance through firmware upgrades; the brush head, as a functional carrier, can be updated with advancements in materials technology (such as graphene bristles and piezoelectric actuation technology), allowing users to enjoy technological benefits without replacing the handle. This "platform + plug-in" ecosystem transforms the product from a "disposable consumer good" into a "sustainable health platform."

[0082] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the protection scope of this utility model.

Claims

1. A control circuit for use in an electric toothbrush, the electric toothbrush comprising a motor, characterized in that, The control circuit includes: Power supply circuit, used to process the input power supply and output it; An information acquisition circuit is used to acquire and output the operating status information of the electric toothbrush, wherein the operating status information includes a first electrical signal, which is converted from the acquired pressure signal; A motor drive circuit, with its output terminal connected to the controlled terminal of the motor, is used to drive the motor to work and provide acoustic vibration. The main control circuit is connected to the output terminal of the information acquisition circuit and the input terminal of the motor drive circuit. It is used to receive the operating status information output by the information acquisition circuit and output a corresponding first control signal to the motor drive circuit according to the first electrical signal, so as to control the motor to enter the preset overvoltage mode. The pressure-sensing lamp circuit has its input terminal connected to the main control circuit. The main control circuit is also used to output a corresponding first driving signal to the pressure-sensing lamp circuit according to the first electrical signal, so that the pressure-sensing lamp circuit responds to the first driving signal and works. A Bluetooth communication circuit is provided for the main control circuit to communicate with the mobile terminal via Bluetooth; wherein, the main control circuit is also used to send the received operating status information to the mobile terminal through the Bluetooth communication circuit.

2. The control circuit as described in claim 1, characterized in that, The information acquisition circuit includes: The pressure sensing circuit, with its output terminal connected to the main control circuit, is used to collect pressure signals, convert them into a first electrical signal, and output them to the main control circuit. The gyroscope circuit, with its output connected to the main control circuit, is used to collect the position information and movement trajectory of the electric toothbrush and output them to the main control circuit.

3. The control circuit as described in claim 2, wherein the electric toothbrush further includes a toothbrush head, characterized in that, The pressure sensing circuit includes: A pressure sensor switch is installed inside the toothbrush head. One end of the pressure sensor switch is connected to the pressure input terminal of the main control circuit, and the other end is grounded. The pressure sensor switch is used to detect the pressure of the toothbrush head contacting the teeth and outputs a first electrical signal to the main control circuit when triggered.

4. The control circuit as described in claim 1, characterized in that, The Bluetooth communication circuit includes: Antennas are used to transmit or receive signals; The signal transceiver circuit, connected to the antenna and the main control circuit, is used to modulate the operating status information of the main control circuit into a radio frequency signal or to convert the received signal into an electrical signal and output it to the main control circuit.

5. The control circuit as described in claim 4, characterized in that, The Bluetooth communication circuit and the main control circuit are integrated into the same chip.

6. The control circuit as described in claim 1, characterized in that, Also includes: A power switch circuit, connected to the main control circuit, is used to output a corresponding second electrical signal to the main control circuit when operated by the user. The main control circuit is used to receive and output a corresponding second control signal to the motor drive circuit according to the second electrical signal of the power switch circuit, so as to control the motor to enter the corresponding working mode.

7. The control circuit according to any one of claims 1-6, characterized in that, Also includes: A data storage circuit, connected to the main control circuit, is used to store the operating status information received by the main control circuit.

8. The control circuit as described in claim 1, characterized in that, The power supply circuit includes: Charging circuit, used to process the power supply of the connected power source; A voltage conversion circuit, with its input terminal connected to the charging circuit, is used to convert the power output from the charging circuit into a first voltage output.

9. An electric toothbrush, characterized in that, Includes a battery, a motor, and a control circuit as described in any one of claims 1-8.

10. The electric toothbrush as described in claim 9, characterized in that, Also includes: The control circuit, battery, and motor are housed within the handle. A toothbrush head, which is detachably mounted at one end of the handle.

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