Motor front-mounted magnetic attraction charging electric toothbrush

Abstract

The invention provides a motor front-mounted magnetic attraction charging electric toothbrush which comprises a machine body and a brush head, a connecting assembly is arranged between the machine body and the brush head, the machine body and the brush head are connected through the connecting assembly, and the lower surface of the brush head is attached to the upper surface of the machine body; an inner cavity is formed in the machine body. By arranging the connecting assembly, the limitation of a traditional single connecting mode is broken through, multiple connecting structures are fused, multiple choices are provided for installation and combination of the brush head and the machine body, young users pursuing convenient disassembly and assembly experience and special oral care crowds who preference stable connection can select corresponding connecting modes, and the connecting assembly is convenient to use. And the adaptive brush head is flexibly mounted, so that the replacement form of the brush head is enriched, the individuation and universality of the product are remarkably improved, and the oral cleaning experience which better meets the self requirement is brought to a user.

Description

Technical Field

[0001] The present invention relates to an electric toothbrush, in particular to a motor-front-mounted magnetic charging electric toothbrush, belonging to the technical field of electric toothbrushes. Background Art

[0002] An electric toothbrush is an oral care tool that uses a built-in motor to drive the brush head to vibrate or rotate to achieve efficient teeth cleaning. The brush head movement modes are generally divided into two categories: sonic (high-frequency vibration) and rotation. Compared with traditional manual toothbrushes, it can more effectively remove dental plaque and reduce gum problems. Some models have intelligent functions such as timing, pressure sensing, and multiple cleaning modes to help users develop more scientific brushing habits.

[0003] Current electric toothbrushes have some limitations in practical use.

[0004] First, the distance between the motor and the brush head in the internal structure design of the electric toothbrush is relatively far. When the motor starts running and generates vibration energy, this energy needs to be transmitted upward along the handle structure of the toothbrush. However, the internal structure of the handle is often more complicated, containing various components and supporting structures, which will hinder the transmission of vibration energy. At the same time, the long transmission distance also causes the vibration energy to gradually attenuate during the transmission process. Ultimately, when the vibration energy reaches the brush head, its intensity has been greatly reduced, resulting in a significantly smaller vibration amplitude of the brush head. This makes it difficult for the bristles to penetrate deep into the gaps between teeth, pits and fissures, and other cleaning dead corners, affecting the removal of dental plaque and food debris on the surface of the teeth, making it difficult to achieve efficient cleaning;

[0005] Secondly, due to the compact and portable design of the electric toothbrush, the battery compartment is relatively small. The limited size of the battery compartment directly restricts the maximum capacity of the battery. Battery capacity is an important indicator of the battery's ability to store electrical energy. The larger the capacity, the more electrical energy the battery can provide, and the longer the battery life of the electric toothbrush. However, the smaller battery compartment cannot accommodate large-capacity batteries, resulting in the battery capacity of electric toothbrushes being generally small.

[0006] Third, most electric toothbrushes currently on the market offer a relatively simple method for replacing brush heads, typically using a fixed snap-on or rotating connection. While this single replacement method ensures a stable connection between the brush head and the handle, it struggles to meet the diverse needs of different users, who each have their own unique needs and preferences when using an electric toothbrush.

[0007] To this end, a magnetic charging electric toothbrush with a front motor is proposed. Summary of the Invention

[0008] In view of this, the present invention provides a motor-front magnetic charging electric toothbrush to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0009] The technical solution of the embodiment of the present invention is implemented as follows: a motor-front magnetic charging electric toothbrush, comprising a body and a brush head, wherein a connecting assembly is provided between the body and the brush head, and the body and the brush head are detachably connected via the connecting assembly;

[0010] An inner chamber, a mounting groove and a motor compartment are provided inside the body. A motor compartment is provided inside the end of the body close to the connecting component. A mounting groove is provided inside the body between the inner chamber and the motor compartment. A battery is provided inside the inner chamber. The motor compartment is located at the end of the body close to the brush head and a vibration motor is installed inside. A control circuit board is provided in the mounting groove, and the battery, the vibration motor and the control circuit board are electrically connected.

[0011] Further preferably, the connection assembly includes a plug, a second waterproof ring and a plug interface;

[0012] The plug is fixedly connected to one end face of the body close to the brush head, the plug interface is opened on the lower surface of the brush head, the outer wall of the plug is provided with a groove, the second waterproof ring is embedded in the inner wall of the groove, the plug is inserted into the inside of the plug interface, and the outer wall of the second waterproof ring is fitted with the inner wall of the plug interface.

[0013] Further preferably, the connection assembly includes a plug and an elastic glass bead,

[0014] The plug is fixedly connected to one end of the body close to the brush head. The brush head is provided with a plug interface. The inner wall of the plug interface is provided with a circular recess. The outer wall of the plug is provided with a mounting hole corresponding to the circular recess. The elastic glass bead is embedded in the inside of the mounting hole, the plug is inserted into the inside of the plug interface, and the elastic glass bead is inserted into the inside of the circular recess.

[0015] Further preferably, the connection assembly includes two sockets, a pressing piece and a lantern spring;

[0016] The two sockets are symmetrically fixedly connected to one end face of the brush head close to the body, and a rectangular groove is provided on one end face of the body close to the brush head. The inner bottom wall of the rectangular groove is symmetrically provided with mounting openings corresponding to the sockets, the lantern spring is embedded in the inside of the mounting opening, and the pressing piece is embedded in the inner side wall of the rectangular groove.

[0017] Further preferably, two through holes are provided inside the rectangular groove, and the socket passes through the through holes and is plugged into the interior of the lantern spring.

[0018] Further preferably, the connection assembly includes two rubber columns and two steel sleeves;

[0019] The body is symmetrically provided with countersunk holes on one end face close to the brush head, the two rubber columns are symmetrically fixedly connected to the end face of the brush head close to the body, the two steel sleeves are symmetrically embedded in the inside of the two countersunk holes, and the rubber columns are inserted into the inside of the steel sleeves.

[0020] Further preferably, the connection assembly includes a plug, a plug interface, two first protrusions and two second protrusions;

[0021] The plug is fixedly connected to one end face of the body close to the brush head, the plug interface is opened on one end face of the brush head close to the body, the two first protrusions are symmetrically fixedly connected to the two sides of the plug, the two second protrusions are symmetrically fixedly connected to the inner side wall of the plug interface, the plug is inserted into the inside of the plug interface, and the outer side wall of the first protrusion is in contact with the outer side wall of the second protrusion.

[0022] Further preferably, a motor cover is fastened to the inside of the motor compartment, and a soft rubber cover is installed on the upper surface of the body, the position of the soft rubber cover corresponds to the position of the motor compartment and the mounting groove, the top and bottom of the inner chamber are respectively connected with an inner cavity soft rubber plug and a bottom plug, the outer side wall of the bottom plug is embedded with a first waterproof ring, and a silicone button cover is provided above the control circuit board, and the silicone button cover covers the control buttons on the control circuit board.

[0023] Further preferably, a charging jumper is provided inside the inner chamber, two charging electrode posts are embedded inside the bottom plug, and the electrical ends of the charging jumper are electrically connected to the charging electrode posts and the control circuit board respectively.

[0024] Further preferably, the charging electrode column is made of iron alloy, and a matching magnetic charging cable is provided on the outside of the body.

[0025] The embodiment of the present invention adopts the above technical solution, which has the following advantages:

[0026] 1. The present invention fully utilizes the internal space of the electric toothbrush by designing the entire body into an integrated battery compartment, avoiding the problem of limiting the battery capacity due to the small size of the battery compartment, providing ample storage space for the battery, thereby achieving a significant increase in battery capacity and greatly extending the battery life of the electric toothbrush.

[0027] 2. The present invention greatly shortens the distance between the motor and the brush head by installing the vibration motor on the top of the body. Compared with the layout of traditional electric toothbrushes where the motor is placed at the rear or far away from the brush head, this design significantly reduces the loss of vibration energy in the conduction path. When the electric toothbrush is working, the high-frequency vibration generated by the vibration motor can be more efficiently and directly transmitted to the brush head, avoiding the kinetic energy attenuation caused by long-distance conduction, allowing the brush head to maintain a strong and stable vibration amplitude, significantly improving the cleaning efficiency of the electric toothbrush, while minimizing the vibration of the body, bringing users a more ideal oral care experience.

[0028] 3. The present invention breaks the limitation of the traditional single connection method by setting a connection component, integrates multiple connection structures, and provides multiple choices for the installation combination of the brush head and the body. Whether it is young users who pursue a convenient disassembly and assembly experience, or special oral care people who prefer a stable connection, they can choose the corresponding connection method and flexibly install the adaptive brush head. It not only enriches the replacement form of the brush head, but also significantly improves the personalization and versatility of the product, bringing users an oral cleaning experience that is more in line with their own needs.

[0029] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] Figure 1 This is a diagram showing the overall structure of a motor-front-mounted magnetic charging electric toothbrush according to the present invention;

[0032] Figure 2 It is a schematic diagram of the structural decomposition of the present invention;

[0033] Figure 3 This is a schematic diagram of the motor compartment structure of the present invention;

[0034] Figure 4 This is a structural diagram of the connection component in Example 1 of the present invention;

[0035] Figure 5 This is a structural diagram of the connection component in the second embodiment of the present invention;

[0036] Figure 6This is a structural diagram of a brush head in Example 2 of the present invention;

[0037] Figure 7 This is a structural diagram of the connection component in Example 3 of the present invention;

[0038] Figure 8 This is a diagram of the machine structure in Example 3 of the present invention;

[0039] Figure 9 This is a structural diagram of the connection component in the fourth embodiment of the present invention;

[0040] Figure 10 This is a diagram of the structure of the machine body in the fourth embodiment of the present invention;

[0041] Figure 11 This is a structural diagram of the connection component in the fifth embodiment of the present invention;

[0042] Figure 12 Schematic diagram of the installation position of the second bump of the present invention;

[0043] Figure 13 This is a schematic diagram of the connection between the brush body and the brush head in the fifth embodiment of the present invention;

[0044] Figure 14 For the present invention Figure 13 Magnified view of area A in .

[0045] Figure markings: 101, connecting component; 11, body; 12, brush head; 13, magnetic charging cable; 14, vibration motor; 15, motor cover; 16, inner cavity soft rubber plug; 17, battery; 18, charging electrode column; 19, bottom plug; 20, first waterproof ring; 21, charging jumper; 23, control circuit board; 24, silicone button cover; 25, soft rubber cover; 26, inner chamber; 27, mounting groove; 28, motor compartment; 31, plug; 32, groove; 33, second waterproof ring; 34, plug interface; 35, mounting hole; 36, elastic glass bead; 37, circular recess; 38, socket; 39, pressing piece; 40, through hole; 41, lantern spring; 42, mounting port; 43, rectangular groove; 44, rubber column; 45, steel sleeve; 46, countersunk hole; 47, first bump; 48, second bump. DETAILED DESCRIPTION

[0046] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be considered as illustrative in nature and not restrictive.

[0047] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0048] Example 1

[0049] like Figures 1-4 As shown, an embodiment of the present invention provides a motor-front magnetic charging electric toothbrush, comprising a body 11 and a brush head 12, wherein a connecting assembly 101 is provided between the body 11 and the brush head 12, the body 11 and the brush head 12 are connected via the connecting assembly 101, and the lower surface of the brush head 12 is in contact with the upper surface of the body 11;

[0050] The body 11 has an inner chamber 26, and a battery 17 is installed inside the inner chamber 26. The inner chamber 26 is a battery compartment for installing the battery 17. By designing the entire body 11 as an integrated battery compartment, the internal space of the electric toothbrush is fully utilized, avoiding the problem of the battery capacity being restricted due to the small size of the battery compartment, and providing ample space for the battery 17, thereby achieving a significant increase in battery capacity and greatly extending the battery life of the electric toothbrush.

[0051] The top and bottom of the inner chamber 26 are respectively connected with an inner cavity soft rubber plug 16 and a bottom plug 19. The outer wall of the bottom plug 19 is embedded with a first waterproof ring 20. The inner cavity soft rubber plug 16 and the bottom plug 19 can seal the inner chamber 26 to prevent water from seeping into the inner chamber 26, thereby ensuring the safety of the battery 17. In addition, the first waterproof ring 20 can enhance the sealing effect of the bottom plug 19.

[0052] An installation slot 27 and a motor compartment 28 are provided inside the body 11. The motor compartment 28 is located at the top of the body 11 and a vibration motor 14 is installed inside. The vibration motor 14 can be a flat motor. By installing the vibration motor 14 on the top of the body 11, the distance between the motor and the brush head 12 is greatly shortened. Compared with the layout of the traditional electric toothbrush in which the internal motor is placed at the rear or away from the brush head 12, this design significantly reduces the loss of vibration energy in the conduction path. When the electric toothbrush is working, the high-frequency vibration generated by the vibration motor 14 can be more efficiently and directly transmitted to the brush head 12, avoiding the kinetic energy attenuation caused by long-distance conduction, so that the brush head 12 can maintain a strong and stable vibration amplitude, significantly improving the cleaning efficiency of the electric toothbrush, while minimizing the vibration of the body 11, bringing users a more ideal oral care experience.

[0053] In one embodiment, the motor housing 28 is fastened with the motor cover 15, and the upper surface of the body 11 is installed with a soft rubber cover 25. The position of the soft rubber cover 25 corresponds to the position of the motor housing 28 and the mounting slot 27. The soft rubber cover 25 is molded in-mold to achieve a waterproof and sealing effect.

[0054] The control circuit board 23 is installed inside the mounting groove 27. A silicone key cover 24 is provided above the control circuit board 23. The silicone key cover 24 covers the control keys on the control circuit board 23. The motor cover 15 and the silicone key cover 24 can seal the vibration motor 14 and the keys to prevent the vibration motor 14 and the keys from being eroded by the plastic seal 25 during in-molding.

[0055] The position of the button corresponds to the inclined surface of the soft rubber cover 25 .

[0056] In one embodiment, a charging jumper 21 is disposed within the inner chamber 26 , and two charging electrode posts 18 are embedded within the bottom plug 19 . The electrical ends of the charging jumper 21 are electrically connected to the charging electrode posts 18 and the control circuit board 23 , respectively. The charging jumper 21 is used to control the charging of the battery 17 .

[0057] The charging electrode column 18 is installed inside the bottom plug 19 by cold pressing assembly and applying waterproof glue, hot melting assembly and applying waterproof glue, or metal mold forming and applying waterproof glue, thereby ensuring the waterproof effect.

[0058] In one embodiment, the charging electrode column 18 is made of iron alloy, and a matching magnetic charging line 13 is provided on the outside of the body 11. The magnetic charging line 13 directly uses magnets as positive and negative poles for conduction, has the dual functions of adsorption and conduction, and achieves the ultimate cost optimization.

[0059] The connection assembly 101 includes a plug 31, a groove 32, a second waterproof ring 33 and an insertion port 34;

[0060] The plug 31 is fixedly connected to the upper surface of the body 11, the plug port 34 is provided on the lower surface of the brush head 12, the groove 32 is provided on the outer wall of the plug 31, and the second waterproof ring 33 is embedded in the inner wall of the groove 32. The position of the second waterproof ring 33 can be limited by the groove 32;

[0061] The plug 31 is inserted into the inside of the plug port 34, and the outer wall of the second waterproof ring 33 fits against the inner wall of the plug port 34. When installing the brush head 12, the plug 31 is inserted into the plug port 34. The second waterproof ring 33 can make the plug 31 fit tightly with the plug port 34, and at the same time prevent water from accumulating in the plug port 34.

[0062] Example 2

[0063] like Figure 5-Figure 6 As shown, the connection assembly 101 includes a plug 31, an insertion port 34, two mounting holes 35, an elastic glass bead 36 and a circular recess 37;

[0064] The plug 31 is fixedly connected to the upper surface of the body 11. The plug port 34 is provided on the lower surface of the brush head 12. Mounting holes 35 are respectively provided on the front and rear surfaces of the plug 31. An elastic glass bead 36 is embedded in the mounting holes 35. One end of the elastic glass bead 36 protrudes from the mounting hole 35, and the protruding end is spherical.

[0065] The plug 31 is inserted into the plug port 34, and the elastic glass bead 36 is inserted into the circular recess 37. When installing the brush head 12, the plug 31 is inserted into the plug port 34. The elastic glass bead 36 is inserted into the circular recess 37 during the insertion process, thereby limiting the position of the plug 31 and achieving installation of the brush head 12.

[0066] The elastic glass bead 36 cooperates with the circular recess 37 , making it easy to insert and remove the brush head 12 , thereby facilitating replacement of the brush head 12 .

[0067] Example 3

[0068] like Figure 7-Figure 8 As shown, the connection assembly 101 includes two sockets 38, a pressing piece 39, a lantern spring 41, two mounting openings 42 and a rectangular slot 43;

[0069] Two sockets 38 are symmetrically fixedly connected to the lower surface of the brush head 12. A rectangular groove 43 is formed on the upper surface of the body 11. Two mounting openings 42 are symmetrically formed on the inner bottom wall of the rectangular groove 43. The lantern spring 41 is embedded in the interior of the mounting opening 42. The mounting opening 42 can define the position of the lantern spring 41, and the rectangular groove 43 can define the position of the pressing piece 39.

[0070] The pressing piece 39 is embedded in the inner wall of the rectangular groove 43. The rectangular groove 43 has two through holes 40 formed therein. The socket 38 passes through the through holes 40 and is inserted into the interior of the lantern spring 41. During assembly, the lantern spring 41 is first installed in the interior of the mounting opening 42. The lantern spring 41 automatically tightens after being inserted into the mounting opening 42. Then, the pressing piece 39 is installed in the rectangular groove 43.

[0071] When installing the brush head 12 , the socket 38 is inserted into the interior of the lantern spring 41 . Since the lantern spring 41 automatically shrinks inside the installation opening 42 , the position of the socket 38 can be limited by the lantern spring 41 , thereby achieving the installation of the brush head 12 .

[0072] Example 4

[0073] like Figure 9-10 As shown, the connection assembly 101 includes two rubber columns 44, two steel sleeves 45 and two countersunk holes 46;

[0074] Two countersunk holes 46 are symmetrically opened on the upper surface of the body 11, two rubber columns 44 are symmetrically fixedly connected to the lower surface of the brush head 12, and two steel sleeves 45 are symmetrically embedded in the interior of the two countersunk holes 46. The rubber columns 44 are inserted into the interior of the steel sleeves 45, and the positions of the steel sleeves 45 can be limited by the countersunk holes 46;

[0075] The brush head 12 can be installed by inserting the rubber column 44 into the steel sleeve 45. The rubber column 44 and the steel sleeve 45 are interference fit. The steel sleeve 45 can limit the position of the rubber column 44, thereby fixing the position of the brush head 12.

[0076] Example 5

[0077] like Figure 11-14 As shown, the connection assembly 101 includes a plug 31, an insertion port 34, two first protrusions 47 and two second protrusions 48;

[0078] The plug 31 is fixedly connected to the upper surface of the body 11, and the plug interface 34 is opened on the lower surface of the brush head 12. The two first protrusions 47 are symmetrically fixedly connected to the two sides of the plug 31. The first protrusion 47 and the plug 31 are an integral structure. The two second protrusions 48 are symmetrically fixedly connected to the inner side wall of the plug interface 34. The second protrusion 48 and the brush head 12 are an integral interface. The plug 31 is plugged into the inside of the plug interface 34. The outer wall of the first protrusion 47 fits with the outer wall of the second protrusion 48. The tops of the first protrusion 47 and the second protrusion 48 are staggered. The position of the plug 31 can be limited by the cooperation of the first protrusion 47 and the second protrusion 48.

[0079] When installing the brush head 12, the plug 31 is inserted into the plug port 34. During the insertion process, the first protrusion 47 contacts the second protrusion 48 and then staggers with the top of the second protrusion 48. At this time, the first protrusion 47 and the second protrusion 48 are locked, which can limit the position of the plug 31 and thus achieve the installation of the brush head 12.

[0080] The outer walls of the first protrusion 47 and the second protrusion 48 are both provided with rounded corners, so that they can be inserted with force to form a fit, and can also be pulled out with force to separate the plug 31 from the plug port 34.

[0081] Example 6

[0082] In a motor-front magnetic charging electric toothbrush, a pressure sensor is provided on the body 11. The user presses the pressure sensor to generate corresponding pressure, and then the control circuit board 23 can adjust the vibration frequency of the vibration motor 14. The specific steps of the frequency control algorithm include:

[0083] Step 1: Signal acquisition and preprocessing,

[0084] Pressure sensor signal acquisition, data filtering and signal conditioning circuit;

[0085] Specifically, the pressure sensor, a piezoresistive or capacitive sensor, is mounted on the body of the electric toothbrush, corresponding to the area where the user's finger contacts the brush. When the user presses, the sensor generates an electrical signal (voltage or current) proportional to the pressure. The analog-to-digital converter (ADC) on the control circuit board regularly samples this signal and converts it into a digital value for subsequent processing.

[0086] When the electric toothbrush starts, the pressure sensor needs to be initialized first. This includes setting the sensor's operating mode, output range and other parameters. For example, for a piezoresistive sensor, its supply voltage may need to be adjusted to ensure that the output signal is within the appropriate range. At the same time, the signal conditioning circuit and ADC are initialized, and the amplification factor, filtering parameters, sampling rate, etc. are configured.

[0087] Due to environmental noise, electromagnetic interference, and subtle hand movements, the raw pressure signal may contain high-frequency noise and glitches. To eliminate these interferences, digital filtering technology is used to smooth the signal. Filtering methods include:

[0088] Moving average filtering: averages multiple consecutive sampling values ​​to effectively suppress high-frequency noise.

[0089] Low-pass filtering: Design a suitable cutoff frequency to filter out noise components above this frequency.

[0090] Median filtering: Sorts the data within the sampling window and takes the middle value as the output, which has a good suppression effect on impulse noise.

[0091] The signal output by a pressure sensor is typically weak and may contain noise and interference. The role of a signal conditioning circuit is to amplify and filter the sensor's output signal to improve its quality and amplitude, making it suitable for subsequent analog-to-digital conversion.

[0092] Amplifier circuit: An operational amplifier is used to construct an amplifier circuit to amplify the weak voltage signal output by the sensor to an appropriate amplitude. The amplification factor needs to be determined based on the output characteristics of the sensor and the input range of the ADC.

[0093] Filter circuit: To eliminate high-frequency noise and interference in the signal, a filter circuit is usually connected after the amplifier circuit. Common filter circuits include low-pass filters, which can filter out noise components above the cutoff frequency and retain the valid pressure signal.

[0094] Step 2: Establish the pressure and frequency mapping relationship.

[0095] Pressure range division, frequency adjustment strategy and frequency adjustment range setting;

[0096] Specifically, we first need to determine the range of pressure that the user may apply and divide it into several intervals. For example, the pressure range can be divided into three intervals: low, medium, and high, corresponding to different vibration frequency levels.

[0097] Develop corresponding frequency adjustment strategies based on the pressure range. Common strategies include:

[0098] Linear mapping: There is a linear relationship between pressure and frequency. The greater the pressure, the higher the frequency.

[0099] Non-linear mapping: Design non-linear mapping curves, such as exponential or logarithmic, based on user comfort or cleaning effect requirements.

[0100] Segmented mapping: Different mapping relationships are used in different pressure ranges to better suit the preferences of different users.

[0101] The maximum and minimum vibration frequencies of the vibration motor need to be determined. This depends on the physical characteristics of the motor and the user's comfort threshold. Typically, the vibration frequency of an electric toothbrush ranges from a few hundred hertz to a few thousand hertz.

[0102] Step 3: Frequency adjustment execution

[0103] Drive signal generation, real-time adjustment mechanisms, and transition smoothing;

[0104] Specifically, vibration motors are typically driven using pulse-width modulation (PWM) signals. The control circuit board generates a PWM signal at a target frequency. Adjusting the duty cycle further controls the motor's vibration intensity. (While this example primarily adjusts the frequency, the duty cycle can also be used as a secondary parameter.)

[0105] The algorithm needs to monitor pressure changes in real time and adjust the frequency of the PWM signal immediately. This requires the algorithm to have high real-time performance and response speed to avoid noticeable delays to the user.

[0106] To avoid the discomfort caused by frequency mutation, the algorithm needs to make a smooth transition during the frequency adjustment process. The following methods can be used:

[0107] Gradual adjustment: When the pressure changes, the frequency does not jump to the target value immediately, but changes gradually according to a certain time constant.

[0108] Hysteresis processing: Set a certain pressure threshold range and do not adjust the frequency when the pressure fluctuation is small to reduce the instability caused by frequent adjustments.

[0109] Step 4: Feedback and Optimization

[0110] User feedback collection, algorithm adaptive optimization and learning function implementation

[0111] Specifically, user feedback is used to understand the comfort and cleaning effectiveness of frequency adjustments. This data can be collected through built-in feedback mechanisms (such as keystrokes) or via a mobile app. Based on user feedback, the algorithm can adaptively adjust the pressure-frequency mapping relationship. For example, if users generally report that the frequency in a certain pressure range is too high or too low, the mapping curve can be automatically adjusted.

[0112] More advanced algorithms can implement learning functions, record user usage habits, and automatically optimize frequency adjustment strategies.

[0113] For example, by analyzing users' historical usage data through machine learning algorithms, users' preferences can be predicted and the frequency can be adjusted in advance.

[0114] Based on the above analysis, the following are the specific implementation steps of the control algorithm:

[0115] 1. Initialization:

[0116] Initialize the pressure sensor and PWM driver module.

[0117] Loads the default pressure-frequency mapping table.

[0118] 2. Main loop:

[0119] Step 1: Pressure sampling,

[0120] Read the ADC value of the pressure sensor regularly.

[0121] Step 2: Data filtering,

[0122] Apply moving average filtering and median filtering to process the raw data.

[0123] Step 3: Pressure value calculation,

[0124] Convert the filtered ADC value to actual pressure value (may require calibration).

[0125] Step 4: Frequency mapping,

[0126] Find or calculate the corresponding target frequency based on the pressure value.

[0127] Step 5: Frequency adjustment,

[0128] Generate a PWM signal of the corresponding frequency to adjust the driving frequency of the vibration motor.

[0129] Step 6: Smooth transition,

[0130] If needed, apply gradient adjustments or hysteresis.

[0131] Step 7: Feedback processing,

[0132] Detect user feedback signals (such as through other sensors or buttons).

[0133] Step 8: Adaptive optimization,

[0134] Adjust the mapping relationship or algorithm parameters based on the feedback.

[0135] 3. Exception handling:

[0136] Detects sensor failure or communication errors.

[0137] Enter safe mode, keep default frequency or turn off motor.

[0138] When the present invention is in operation: before use, the brush head 12 can be replaced according to the use requirements. The brush head 12 is installed on the body 11 by plugging. When in use, the soft rubber cover 25 is pressed, and the soft rubber cover 25 transmits pressure to the button of the control circuit board 23. At this time, the control battery 17 supplies power to the vibration motor 14, and the vibration motor 14 vibrates at a high frequency, driving the top of the body 11 to vibrate at a high frequency. The body 11 drives the brush head 12 through the connecting component 101, and then the brush head 12 can vibrate at a high frequency, which can clean the teeth.

[0139] Compared with the existing technology, the present invention fully utilizes the internal space of the electric toothbrush by designing the entire body 11 into an integrated battery compartment, avoiding the problem of limiting the battery capacity due to the small size of the battery compartment. By installing the vibration motor 14 on the top of the body 11, the distance between the motor and the brush head 12 is greatly shortened, and the loss of vibration energy in the conduction path is reduced. By setting a variety of connection methods, the replacement methods of the brush head 12 are enriched, which can meet the diverse usage needs of different people.

[0140] Example 7

[0141] In a motor-front magnetic rechargeable electric toothbrush, a button control module is provided on the body 11. The user presses the button control module to generate different pressing operations. The control circuit board adjusts the vibration frequency of the vibration motor by changing the output voltage. The specific steps of the frequency control algorithm are as follows:

[0142] Step 1: Initialize settings

[0143] When the electric toothbrush is started, the system needs to be initialized. First, initialize the button control module and set the button trigger mode to ensure that single press, multiple presses and other operations can be accurately identified. At the same time, initialize the voltage regulation module on the control circuit board and configure the initial parameters of its output voltage, including the minimum output voltage, maximum output voltage and voltage regulation step, so that the voltage regulation module is in standby state. In addition, load the default voltage-frequency mapping table, which records the correspondence between different voltage values ​​and the vibration frequency of the vibration motor, providing a basis for subsequent frequency adjustment.

[0144] Step 2: Voltage signal acquisition and processing

[0145] The key control module uses mechanical or touch keys. When a user presses a key, the key control module generates a corresponding electrical signal. The signal acquisition circuit on the control circuit board monitors the changes in the key control module's electrical signal in real time. When a key press is detected, the number of presses is recorded. To ensure the accuracy and reliability of the collected signal, the signal needs to be de-jittered. Because mechanical keys produce brief jitter when pressed and released, and touch keys may also be affected by electromagnetic interference, software delay de-jitter or hardware filtering de-jitter is used to eliminate misjudgments caused by signal jitter and ensure that each press operation is accurately recognized.

[0146] Step 3: Establish voltage and frequency mapping relationship

[0147] Determine the voltage adjustment range based on the operating characteristics of the electric toothbrush's vibration motor. Generally speaking, the voltage adjustment range needs to take into account factors such as the motor's rated voltage, minimum starting voltage, and maximum withstand voltage to ensure that the motor frequency is adjusted within a safe voltage range. Divide the voltage adjustment range into several intervals, each corresponding to a different vibration frequency level. For example, the voltage range can be divided into high, medium, and low voltage intervals, corresponding to high-frequency vibration, medium-frequency vibration, and low-frequency vibration, respectively.

[0148] Develop a voltage-frequency mapping strategy. Common strategies include linear mapping and segmented mapping. Linear mapping means that the voltage and frequency have a linear relationship, with higher voltages resulting in higher frequencies. Segmented mapping uses different mapping relationships in different voltage ranges to better meet different cleaning needs and user experiences. Furthermore, determine the maximum and minimum vibration frequencies of the vibration motor at different voltages to ensure that frequency adjustment achieves both cleaning results and user comfort.

[0149] Step 4: Frequency adjustment execution

[0150] The vibration motor is driven by voltage. The control circuit board determines the target voltage value based on the number of presses, and then outputs the corresponding voltage signal through the voltage regulation module. The voltage regulation module uses pulse width modulation (PWM) technology or a digital-to-analog converter (DAC) to convert the digital signal into an analog voltage signal and output it to the vibration motor. For example, when the user presses a button once, the control circuit board determines the PWM signal or DAC value corresponding to the output high voltage based on a preset mapping relationship, driving the vibration motor to vibrate at a high frequency. When the user presses the button twice, it outputs signals corresponding to medium and low voltages, causing the motor to vibrate at medium and low frequencies.

[0151] The algorithm needs to monitor key presses in real time and adjust the output voltage immediately. To ensure timely and stable frequency adjustments, the algorithm must respond quickly. During voltage switching, a smooth transition should be implemented to avoid motor vibration instability and noise caused by sudden voltage changes. This can be achieved by gradually changing the PWM signal's duty cycle or the DAC's output value, ensuring a smooth transition to the target voltage over a specified period of time.

[0152] Step 5: Feedback and Optimization

[0153] A built-in feedback mechanism collects user feedback during use. For example, a feedback button can be set on the electric toothbrush handle, allowing users to express their satisfaction with the current vibration frequency by pressing the feedback button. Alternatively, a mobile phone app can be used to connect to the electric toothbrush via Bluetooth to collect user operation data and feedback during use. Based on user feedback, the algorithm can adaptively adjust the voltage-frequency mapping relationship. If the majority of users report that the frequency corresponding to a certain voltage range is too high or too low, the mapping curve can be automatically adjusted to optimize the frequency regulation strategy.

[0154] More advanced algorithms can learn from past user data, analyzing habits and preferences to automatically predict the vibration frequency a user might need. For example, based on the time of day a user uses their electric toothbrush, the number and frequency of button presses, and other data, the algorithm can adjust the vibration frequency to the appropriate level the next time the user uses the toothbrush, improving the user experience.

[0155] Based on the above analysis, the following are the specific implementation steps of the control algorithm:

[0156] initialization:

[0157] Initialize the button control module and voltage regulation module.

[0158] Load the default voltage-frequency mapping table.

[0159] Main loop:

[0160] Step 1: Key detection: Detect the key press events of the key control module in real time and record the number of presses.

[0161] Step 2: Signal processing: De-jitter the key signal to ensure the accuracy of the number of presses.

[0162] Step 3: Voltage calculation: Find or calculate the corresponding target voltage value based on the number of presses.

[0163] Step 4: Frequency mapping: Determine the target vibration frequency of the vibration motor based on the target voltage value.

[0164] Step 5: Voltage output: Output the target voltage signal through the voltage regulation module to drive the vibration motor.

[0165] Step 6: Smooth transition: During the voltage switching process, the voltage is adjusted in a gradual manner to achieve a smooth transition of the frequency.

[0166] Step 7: Feedback processing: Detect user feedback signals (such as through feedback buttons or mobile phone APP).

[0167] Step 8: Adaptive optimization: Adjust the voltage-frequency mapping relationship or algorithm parameters based on the feedback.

[0168] Exception handling:

[0169] Detect key control module failure, voltage regulation module failure or communication error.

[0170] Enter safe mode, maintain default voltage output or turn off the motor.

[0171] During operation, the present invention allows the brush head to be replaced as needed before use, and is installed on the body by plugging. During use, the user presses a button, and the button control module transmits a press count signal to the control circuit board. The control circuit board adjusts the output voltage based on the number of presses, controls the battery to power the vibration motor, and causes the vibration motor to vibrate at a corresponding frequency, driving the top of the body to vibrate at a high frequency. The body then drives the brush head to vibrate at a high frequency through the connecting assembly, thereby achieving tooth cleaning.

[0172] Compared to the existing technology, this invention not only shares the advantages of Example 6, but also features a simple and intuitive method of adjusting the motor frequency by controlling the voltage via a key. Users can quickly switch between different vibration frequencies according to their needs, meeting diverse cleaning requirements. Furthermore, this control method is highly stable, effectively reducing the probability of misoperation caused by complex operations, and improving user convenience and comfort.

[0173] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various modifications and substitutions within the technical scope disclosed in the present invention, and such modifications and substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A motor-front magnetic charging electric toothbrush, comprising a body (11) and a brush head (12), characterized in that: A connecting assembly (101) is provided between the machine body (11) and the brush head (12), and the machine body (11) and the brush head (12) are detachably connected via the connecting assembly (101); The body (11) is provided with an inner chamber (26), a mounting groove (27) and a motor compartment (28); the motor compartment (28) is provided at one end of the body (11) close to the connecting assembly (101); the body (11) is provided with a mounting groove (27) between the inner chamber (26) and the motor compartment (28); a battery (17) is provided inside the inner chamber (26); the motor compartment (28) is located at one end of the body (11) close to the brush head (12) and has a vibration motor (14) installed therein; a control circuit board (23) is provided in the mounting groove (27); the battery (17), the vibration motor (14) and the control circuit board (23) are electrically connected.

2. The motor-front-mounted magnetic rechargeable electric toothbrush according to claim 1, characterized in that: The connecting assembly (101) comprises a plug (31), a second waterproof ring (33) and an inserting port (34); The plug (31) is fixedly connected to an end surface of the body (11) close to the brush head (12), the plug interface (34) is opened on the lower surface of the brush head (12), the outer wall of the plug (31) is provided with a groove (32), the second waterproof ring (33) is embedded in the inner wall of the groove (32), the plug (31) is inserted into the inside of the plug interface (34), and the outer wall of the second waterproof ring (33) is in contact with the inner wall of the plug interface (34).

3. The motor-front-mounted magnetic charging electric toothbrush according to claim 1, characterized in that: The connecting assembly (101) includes a plug (31) and an elastic glass bead (36). The plug (31) is fixedly connected to one end of the body (11) close to the brush head (12); the brush head (12) is provided with a plug interface (34); the inner side wall of the plug interface (34) is provided with a circular recess (37); the outer side wall of the plug (31) is provided with a mounting hole (35) corresponding to the circular recess (37); the elastic glass bead (36) is embedded in the interior of the mounting hole (35); the plug (31) is plugged into the interior of the plug interface (34); and the elastic glass bead (36) is plugged into the interior of the circular recess (37).

4. The motor-front-mounted magnetic rechargeable electric toothbrush according to claim 1, characterized in that: The connecting assembly (101) includes two sockets (38), a pressing piece (39) and a lantern spring (41); The two sockets (38) are symmetrically fixedly connected to one end surface of the brush head (12) close to the body (11); a rectangular groove (43) is provided on one end surface of the body (11) close to the brush head (12); the inner bottom wall of the rectangular groove (43) is symmetrically provided with a mounting opening (42) corresponding to the sockets (38); the lantern spring (41) is embedded in the inside of the mounting opening (42); and the pressing piece (39) is embedded in the inner side wall of the rectangular groove (43).

5. The motor-front-mounted magnetic charging electric toothbrush according to claim 4, characterized in that: Two through holes (40) are provided inside the rectangular groove (43), and the socket (38) passes through the through holes (40) and is plugged into the inside of the lantern spring (41).

6. The motor-front-mounted magnetic rechargeable electric toothbrush according to claim 1, characterized in that: The connecting assembly (101) includes two rubber columns (44) and two steel sleeves (45); The machine body (11) is symmetrically provided with countersunk holes (46) on one end surface close to the brush head (12); the two rubber columns (44) are symmetrically fixedly connected to the end surface of the brush head (12) close to the machine body (11); the two steel sleeves (45) are symmetrically embedded in the inside of the two countersunk holes (46); and the rubber columns (44) are inserted into the inside of the steel sleeves (45).

7. The motor-front-mounted magnetic rechargeable electric toothbrush according to claim 1, characterized in that: The connecting assembly (101) comprises a plug (31), a plug interface (34), two first protrusions (47) and two second protrusions (48); The plug (31) is fixedly connected to an end face of the body (11) close to the brush head (12), the plug interface (34) is opened on an end face of the brush head (12) close to the body (11), the two first protrusions (47) are symmetrically fixedly connected to the two sides of the plug (31), the two second protrusions (48) are symmetrically fixedly connected to the inner side wall of the plug interface (34), the plug (31) is plugged into the inside of the plug interface (34), and the outer side wall of the first protrusion (47) is in contact with the outer side wall of the second protrusion (48).

8. The motor-front-mounted magnetic rechargeable electric toothbrush according to claim 1, characterized in that: The motor compartment (28) is fastened with a motor cover (15), and the upper surface of the body (11) is installed with a soft rubber cover (25). The position of the soft rubber cover (25) corresponds to the position of the motor compartment (28) and the installation groove (27). The top and bottom of the inner chamber (26) are respectively plugged with an inner cavity soft rubber plug (16) and a bottom plug (19). The outer side wall of the bottom plug (19) is embedded with a first waterproof ring (20). A silicone button cover (24) is provided above the control circuit board (23), and the silicone button cover (24) covers the control buttons on the control circuit board (23).

9. The motor-front-mounted magnetic charging electric toothbrush according to claim 8, characterized in that: A charging jumper (21) is provided inside the inner chamber (26), two charging electrode posts (18) are embedded inside the bottom plug (19), and the electrical ends of the charging jumper (21) are electrically connected to the charging electrode posts (18) and the control circuit board (23) respectively.

10. The motor-front-mounted magnetic charging electric toothbrush according to claim 9, characterized in that: The charging electrode column (18) is made of an iron alloy, and a matching magnetic charging line (13) is provided on the outside of the body (11).

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