Integrated built-in servo drive sweeping and vibrating motor and electric toothbrush

Abstract

The utility model relates to the technical field of motors, solves the technical problem that a motor of an electric toothbrush in the prior art is complex in structure, and provides an integrated built-in servo drive sweeping and vibrating motor and an electric toothbrush. The motor comprises a servo motor, a driving module and a shell, and the servo motor is installed in the shell and used for generating a sweeping vibration action; the driving module is mounted at the bottom of the shell, is connected with the motor and is used for receiving a signal to drive and control the servo motor to rotate; wherein the shell is in a column shape. According to the motor, the servo motor and the driving module are arranged in the shell, connecting lines between the servo motor and the driving module are reduced, the overall structure is more compact, the internal space is saved, and the overall structure of the motor is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to an integrated built-in servo-driven sweeping and vibrating motor and an electric toothbrush. Background Art

[0002] With the increasing demand for oral health and higher expectations for personal care products, as an important tool for daily oral cleaning, the technological innovation and performance optimization of electric toothbrushes are particularly important. In the early days, most electric toothbrushes used motors with simple reciprocating or rotating motions, which had limitations in terms of cleaning effect, user experience, and personalized settings, and also had problems such as low integration, inaccurate control, high energy consumption, and high production costs. Content of the Utility Model

[0003] In view of this, the embodiments of the utility model provide an integrated built-in servo-driven sweeping and vibrating motor and an electric toothbrush to solve the technical problem of the complex motor structure of existing electric toothbrushes.

[0004] In the first aspect, the embodiments of the utility model provide an integrated built-in servo-driven sweeping and vibrating motor, which includes: a servo motor 3, a driving module 2, and a housing 1. The servo motor 3 is installed inside the housing 1 and is used to generate a sweeping and vibrating action.

[0005] The driving module 2 is installed at the bottom 15 of the housing 1 and is connected to the servo motor 3 for receiving signals to drive and control the rotation of the servo motor 3.

[0006] Wherein, the housing 1 is cylindrical.

[0007] Preferably, the housing 1 further includes a clamping member 4. The clamping member 4 is arranged between the driving module 2 and the servo motor 3. One end of the clamping member 4 is inserted and fixed to the bottom 15 of the housing 1 and contacts one end of the servo motor 3. The driving module 2 is installed at the end of the clamping member 4 away from the servo motor 3.

[0008] Preferably, a pair of insertion interfaces 11 are symmetrically arranged on the housing 1, and a pair of clamping strips 41 extending outward are symmetrically arranged on the clamping member 4.

[0009] When the housing 1 and the clamping member 4 are inserted and installed, the clamping strips 41 are clamped and fixed to the insertion interfaces 11.

[0010] Preferably, the clamping member 4 includes an insertion end 42 inserted and fixed to the bottom 15 of the housing 1 and a free end 43 away from the insertion end 42. The diameter of the insertion end 42 is smaller than the size of the free end 43. The diameter of the free end 43 is greater than or equal to the diameter of the housing 1.

[0011] The servo motor 3 further includes a first bearing. A fixing hole 421 is provided at the center of the plugging end 42, and the first bearing is disposed within the fixing hole 421.

[0012] The free end 43 of the clamp is recessed inward for mounting the driving module 2.

[0013] Preferably, the servo motor 3 includes a stator member and a rotor member. The driving module 2 is connected to the stator member by welding, and is configured to detect the rotor member according to the stator member and feed back the real-time position of the rotor member to the driving module.

[0014] Preferably, the servo motor 3 further includes a first magnetic member;

[0015] The driving module includes a first sensor, which is configured to detect the real-time position of the rotor member according to the magnetic field on the first magnetic member and generate a feedback signal.

[0016] Preferably, the driving module 2 includes an FOC driving unit and a PID control unit;

[0017] The FOC driving unit is configured to adjust the current phase on the stator member according to the feedback signal generated by the first sensor, and control the magnetic flux and torque of the servo motor 3;

[0018] The PID control unit is configured to adjust the motion mode of the servo motor 3 according to the received command signal and the feedback signal generated by the first sensor.

[0019] Preferably, the driving module 2 is provided with a pair of first fixing holes 22, and the clamping member 4 is provided with a pair of second fixing holes 434. The driving module 2 is fixedly mounted on the clamping member 4 by passing a pair of fixing members through the first fixing holes 22 and the second fixing holes 434.

[0020] In a second aspect, an embodiment of the present invention provides an electric toothbrush, which includes the integrated built-in servo-driven sweeping and vibrating motor as described in any one of the above.

[0021] In summary, the beneficial effects of the present invention are as follows:

[0022] The integrated built-in servo-driven sweeping and vibrating motor and the electric toothbrush provided by the embodiments of the present invention reduce the connection wires between the servo motor and the driving module by integrating the servo motor and the driving module within the housing, making the overall structure more compact, saving internal space, which is particularly important for highly portable and miniaturized electric toothbrushes or devices, and helps to reduce the product volume and improve the convenience of carrying and use;

[0023] At the same time, since the external wiring and interfaces are reduced, the failure rate caused by problems such as loose wiring and poor contact is reduced. The integrated package can better protect the internal components from the influence of the external environment (such as water and dust), and extend the service life of the device;

[0024] The close integration of the servo motor and the drive module alleviates the signal transmission delay to a certain extent in signal transmission, and improves the response speed of the entire electric toothbrush system; it enables the electric toothbrush to react faster according to the user's operation or set mode, enhancing the overall user experience and cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention will be briefly introduced below. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, and all of these are within the protection scope of the present invention.

[0026] Figure 1 It is a schematic structural diagram of an integrated built-in servo drive oscillating motor provided in Embodiment 1 of the present invention;

[0027] Figure 2 It is a schematic structural diagram of an integrated built-in servo drive oscillating motor provided in Embodiment 1;

[0028] Figure 3 It is a schematic structural diagram of the housing provided in Embodiment 1;

[0029] Figure 4 It is a schematic structural diagram of the first side of the drive module provided in Embodiment 1;

[0030] Figure 5 It is a schematic structural diagram of the second side of the drive module provided in Embodiment 1;

[0031] Figure 6 It is a schematic structural diagram of the drive module provided in Embodiment 1;

[0032] Figure 7 It is a schematic structural diagram of the plug-in installation of the drive module and the clamping member provided in Embodiment 1;

[0033] Figure 8 It is a schematic structural diagram of the clamping member provided in Embodiment 1;

[0034] Parts and numbers in the figure: 1. Shell; 11. Plug interface; 12. Annular baffle; 14. Top; 15. Bottom; 2. Drive module; 21. Welding point; 22. First fixing hole; 23. Positioning hole; 24. Drive chip; 25. Hall element; 26. Current sampling resistor; 3. Servo motor; 31. Output shaft; 4. Snap-on component; 41. Snap-on strip; 42. Plug end; 421. Fixing hole; 43. Free end; 431. Accommodating groove; 432. First boss; 433. Second boss; 434. Second fixing hole; 435. Positioning component. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation to the present invention. Moreover, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprises..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element. If there is no conflict, the various features of the embodiments and examples of the present invention may be combined with each other and are all within the scope of protection of the present invention.

[0036] See Figures 1 - 3 As shown, the embodiment of the present invention provides an integrated built-in servo-driven sweeping vibration motor, the motor comprising: a servo motor 3, a drive module 2 and a housing 1, the servo motor 3 is installed in the housing 1, and is used to generate a sweeping vibration action;

[0037] The driving module 2 is installed at the bottom 15 of the housing 1 and is connected to the servo motor 3 to receive signals to drive and control the rotation of the servo motor 3;

[0038] Among them, the housing 1 is cylindrical.

[0039] Specifically, the servo motor 3 further includes an output shaft 31. One end of the output shaft 31 is disposed inside the housing 1, and the other end passes through the housing 1 and is located outside the housing 1, and is used to generate and output vibration motions with different trajectories according to the signals received by the driving module 2.

[0040] Place and fix the servo motor 3 at a predetermined position inside the housing 1 to ensure that the servo motor 3 can be accurately aligned with the brush head of the electric toothbrush; the driving module 2 is connected to the servo motor 3 to accurately transmit control signals, control the servo motor 3 to generate vibrations, and transmit the vibrations to the brush head connected to the output shaft 31.

[0041] By placing the servo motor 3 and the driving module 2 inside the housing 1, the connection wires between the servo motor 3 and the driving module 2 are reduced, making the overall structure more compact, saving internal space, which is particularly important for highly portable and miniaturized electric toothbrushes or devices, and helps to reduce the product volume and improve the convenience of carrying and using;

[0042] At the same time, due to the reduction of external connection wires and interfaces, the failure rate caused by problems such as loose wiring and poor contact is reduced. The integrated encapsulation can better protect the internal components from the influence of the external environment (such as water and dust), and extends the service life of the device;

[0043] The close integration of the servo motor 3 and the driving module 2 alleviates the signal transmission delay to a certain extent in signal transmission, and improves the response speed of the entire electric toothbrush system; enables the electric toothbrush to respond faster according to the user's operation or set mode, and improves the overall use experience and cleaning efficiency.

[0044] Wherein the housing 1 is cylindrically arranged, which is convenient for the user to hold.

[0045] Preferably, the housing 1 is made of a metal material to ensure strength and durability while preventing the water vapor on the brush head from entering the housing 1.

[0046] In one embodiment, as Figure 7 and Figure 8 shown, the housing 1 further includes a clamping member 4. The clamping member 4 is disposed between the driving module 2 and the servo motor 3. One end of the clamping member 4 is inserted and fixed at the bottom 15 of the housing 1 and contacts one end of the servo motor 3, and the driving module 2 is installed at the end of the clamping member 4 away from the servo motor 3.

[0047] Specifically, the clamping member 4 is made of an insulating material. One end of the servo motor 3 passes through the housing 1 via the output shaft 31 and is fixed to the housing 1, and the other end contacts one end of the clamping member 4 inserted into the housing 1, fixing the servo motor 3 to prevent it from shaking and affecting the normal operation of the motor.

[0048] One end of the clamping member 4 is inserted into the housing 1, and the other end is located outside the housing 1. The driving module 2 is installed on one end of the clamping member 4 located outside the housing 1. When the driving module 2 and the servo motor 3 are close to each other, due to the isolation of the clamping member 4 between the servo motor 3 and the driving module 2, direct contact between the two is avoided, preventing mutual influence between the two and further protecting the normal operation of each component on the driving module 2.

[0049] In this embodiment, through the setting of the clamping member 4, the servo motor 3 and the driving module 2 are fixedly installed in the housing 1. While achieving the stable installation of the servo motor 3 and the driving module 2, it also avoids the problem that the direct connection and interface between the driving module 2 and the servo motor 3 are reduced to save space, resulting in the two being too close to each other and affecting their normal operation. That is, it not only enhances mechanical stability, simplifies the assembly process, but also optimizes the electrical connection, facilitates maintenance and replacement, and realizes high performance, high reliability, and high maintainability of the product.

[0050] In one embodiment, as Figure 1 and Figure 3 shown, a pair of insertion interfaces 11 are symmetrically arranged on the housing 1, and a pair of clamping strips 41 extending outward are symmetrically arranged on the clamping member 4;

[0051] When the housing 1 and the clamping member 4 are inserted and installed, the clamping strips 41 are fixedly clamped with the insertion interfaces 11.

[0052] Specifically, the housing 1 is cylindrical, and one end of the housing 1 through which the output shaft 31 of the servo motor 3 passes is closed. The clamping member 4 is inserted into the bottom 15 of the housing 1 to support the fixed installation of the servo motor 3 while closing the housing 1.

[0053] A pair of insertion interfaces 11 are symmetrically arranged at the diameter position of the cylinder of the housing 1. The position where the clamping member 4 is inserted into the inner wall of the housing 1 is cylindrical, and a pair of clamping strips 41 extend along the diameter at both ends of the diameter. When the clamping member 4 is inserted into the housing 1, the first step of fixing is achieved, preventing the clamping member 4 from separating from the housing 1. By corresponding clamping of the insertion interfaces 11 and the clamping strips, rotation and movement of the clamping member 4 relative to the housing 1 are avoided, ensuring the position stability of the servo motor 3 and the driving module 2.

[0054] In one embodiment, as Figure 7 and Figure 8 shown, the snap - on part 4 includes a plug - in end 42 plugged and fixed to the bottom 15 of the housing 1 and a free end 43 away from the plug - in end 42; the diameter of the plug - in end 42 is smaller than the size of the free end 43; the diameter of the free end 43 is greater than or equal to the diameter of the housing 1;

[0055] The servo motor 3 further includes a first bearing (not shown in the figure). A fixing hole 421 is provided at the center of the plug - in end 42, and the first bearing is arranged in the fixing hole 421;

[0056] The free end 43 of the snap - on part is recessed inward for installing the driving module 2.

[0057] Specifically, by fixedly connecting the first bearing with the fixing hole 421 on the plug - in end 42, while fixing the relative position between the servo motor 3 and the housing 1, the setting of the first bearing also reduces the friction between the servo motor 3 and the snap - on part 4 during rotation, improves the rotation efficiency, and ensures the smoothness and accuracy of the motor rotation.

[0058] By the inward - recessed setting of the free end 43, an installation space is provided for the driving module 2. While saving the space inside the housing 1, it also promotes the modularization of the device, facilitating the independent installation and replacement of the driving module 2.

[0059] In this embodiment, by embedding the first bearing into the fixing hole 421, it becomes the rotation fulcrum between the servo motor 3 and the snap - on part 4. When the servo motor 3 rotates, the rolling friction of the servo motor 3 in the first bearing replaces the original sliding friction between the servo motor 3 and the snap - on part 4, greatly reducing the rotation resistance, and improving the working efficiency and service life of the motor.

[0060] At the same time, the use of the first bearing significantly reduces the energy consumption and heat generation during the operation of the servo motor 3, improves the smoothness and accuracy of the motor operation, reduces noise, and enhances the user experience of the overall device; by the first bearing bearing the rotation load, the snap - on part 4 is further protected from wear, extending the service life of the device.

[0061] The diameter of the free end 43 is greater than or equal to the diameter of the housing 1, so that when the servo motor 3 is installed, the free end 43 can completely cover the opening at the bottom 15 of the housing 1, forming a flat surface, improving the stability and aesthetics of the overall structure.

[0062] Installing the driving module 2 at the inwardly recessed portion of the free end 43 of the clamping member 4 can simplify the internal wiring and optimize the signal transmission path. At the same time, the driving module 2 is disposed at the inwardly recessed portion of the free end 43, forming an integrated structure with the clamping member 4, reducing the risk of looseness inside the device, and further protecting the driving module 2 from external impacts.

[0063] In one embodiment, as Figure 2 and Figure 3 shown, the device further includes an annular baffle 12, and the annular baffle 12 is disposed at one end of the housing 1 away from the clamping member 4.

[0064] Specifically, the clamping member 4 is clamped with the opening at the bottom 15 of the housing 1, the annular baffle 12 is disposed at the top 14 of the housing 1 and fixed to the bottom 15 of the housing 1. The output shaft 31 of the servo motor 3 passes through the top 14 of the housing 1 and then passes through the annular baffle 12. The annular baffle 12 is used to prevent the water on the toothbrush head from flowing into the housing 1 through the output shaft 31 when the user brushes teeth.

[0065] Preferably, the annular baffle 12 and the housing 1 are fixed by welding.

[0066] In one embodiment, as Figure 2 shown, the servo motor 3 includes a stator member and a rotor member (not shown in the figure). The driving module 2 is connected to the stator member by welding, and is used to detect the rotor member according to the stator member and feedback the real-time position of the rotor member to the driving module.

[0067] Specifically, the servo motor 3 further includes a second bearing and a central shaft (not shown in the figure). The two ends of the central shaft are respectively disposed in the first bearing and the second bearing. The rotor member is fixedly disposed on the central shaft and is used to cooperate with the stator to control the vibration and rotation of the central shaft. The output shaft 31 is a structure in which the central shaft passes through the second bearing and is located outside the housing 1, and the second bearing is fixed to the top 14 of the housing 1.

[0068] A second magnetic member (not shown in the figure) is disposed on the rotor member. By generating a rotating magnetic field through the stator member, the second magnetic member on the rotor member interacts with the magnetic field generated by the stator member to vibrate and rotate the central shaft.

[0069] Connecting the driving module 2 and the stator member by welding ensures a stable electrical and mechanical connection between the two, improving the stability of signal transmission and the accuracy of motor control.

[0070] On the contact surface between the drive module 2 and the stator component, welding points 21 are designed. During the assembly process, the two are connected by soldering to form a non-detachable connection, ensuring the reliability and durability of the connection. The welded connection improves the signal transmission quality between the drive module 2 and the stator component, reduces the risk of poor contact, and enhances mechanical stability, enabling the servo motor 3 to maintain good performance even during high-speed rotation or under vibration.

[0071] The central shaft penetrates the axis of the motor, connects the rotor component and the output shaft 31, and is the main component for transmitting vibration and rotational motion. The second bearing ensures the stable rotation of the central shaft.

[0072] In one embodiment, the servo motor 3 further includes a first magnetic component (not shown in the figure);

[0073] The drive module includes a first sensor (not shown in the figure), and the first sensor is used to detect the real-time position of the rotor component according to the magnetic field on the first magnetic component and generate a feedback signal.

[0074] Specifically, the first magnetic component is fixedly arranged on the central shaft and is used to cooperate with the first sensor to detect the real-time position of the rotor component in real time, providing the real-time position information of the rotor for the control circuit in the drive module.

[0075] Preferably, the first sensor is a plurality of Hall elements 25. By fixing a second magnetic component on the central shaft of the servo motor 3, the Hall elements are used to cooperate to detect the real-time position of the rotor component. The second magnetic component has a small volume and does not generate a strong magnetic field like the second magnetic component on the rotor component. The position information of the rotor component is captured by the Hall elements through the first magnetic component. The Hall elements output corresponding electrical signals according to the magnetic field change, and these electrical signals are read by the control circuit in the drive module 2 to determine the current angular position of the rotor component. The drive module 2 can accurately control the on-off of the windings in the stator component, thereby accurately controlling the rotation speed and direction of the servo motor 3.

[0076] In one embodiment, the drive module 2 includes an FOC drive unit and a PID control unit (not shown in the figure);

[0077] The FOC drive unit is used to adjust the current phase on the stator component according to the feedback signal generated by the first sensor, and control the magnetic flux and torque of the servo motor 3;

[0078] The PID control unit is used to adjust the motion mode of the servo motor 3 according to the received command signal and the feedback signal generated by the first sensor.

[0079] Specifically, the FOC drive unit controls the torque of the servo motor 3 by means of a field-oriented control (FOC) drive control method, and the PID control unit realizes the closed-loop control of the entire electric toothbrush, making the system output close to the target value. The integrated built-in servo drive vibration-sweeping motor provided in this embodiment can adjust three motion modes: single vibration, single sweep, and sweep-vibration.

[0080] Single vibration mode: The drive module 2 continuously adjusts the current of the servo motor 3 according to the set vibration frequency and amplitude to keep the central axis vibrating at a constant amplitude and frequency, thereby enabling the output shaft 31 to vibrate at a constant amplitude and frequency.

[0081] Single sweep mode: The drive module 2 adjusts the current to make the servo motor 3 sweep according to the set trajectory, that is, adjusts the position of the servo motor 3.

[0082] Preferably, the set trajectory is the left-right cyclic rotation of the central axis, which is manifested as the brush head of the electric toothbrush sweeping back and forth in the width direction when viewed on the brush head.

[0083] Sweep-vibration mode: The drive module 2 continuously adjusts the current of the servo motor 3 according to the set vibration frequency and amplitude to keep the central axis vibrating at a constant amplitude and frequency. At the same time, it controls the position change of the servo motor 3 within a certain range. That is, the sweep-vibration mode simultaneously completes the two motion modes of the single sweep mode and the single vibration mode.

[0084] In the electric toothbrush, the PID control unit is used to receive the command signal input from the outside. The command signal includes the mode selected by the user (such as single vibration, sweep-vibration, single sweep) and related parameters (such as vibration frequency, amplitude, etc.); the PID control unit adjusts the current phase and magnitude of the servo motor 3 according to the command information, in combination with the real-time position information of the rotor part feedback by the first sensor Hall element, to control the motion characteristics of the motor.

[0085] In the single vibration mode, the PID algorithm continuously adjusts the current of the motor according to the set vibration frequency and amplitude to quickly respond to maintain the amplitude stability.

[0086] In the single sweep mode, the PID control unit focuses on position control. By adjusting the current, the servo motor 3 is made to sweep according to the set trajectory to ensure the accuracy of the sweep path.

[0087] In the sweep-vibration mode in China, in addition to maintaining the vibration frequency and amplitude, it is also necessary to control the position change of the servo motor 3 within a certain range. The PID control unit coordinates the position control and vibration control to achieve the sweep-vibration motion mode.

[0088] In all motion modes, the PID control unit needs to work in cooperation with the FOC drive unit. The FOC drive unit optimizes the control of the torque of the servo motor 3 by adjusting the current phase of the windings in the stator part of the servo motor 3. The PID algorithm is used to accurately control the speed and torque of the servo motor 3 by adjusting the current phase and magnitude driven by the FOC drive unit according to the rotor position feedback, so as to achieve the motion mode selected by the user.

[0089] In this embodiment, through the cooperation of the FOC drive and the PID control unit, by receiving the command signal and real-time position feedback, the current of the servo motor 3 is adjusted to realize the multi-motion mode selection control of the servo motor 3, ensuring that the electric toothbrush can provide consistent and efficient cleaning effects in different modes.

[0090] In one embodiment, as Figures 4 - 6 shown, the drive module 2 is provided with a pair of first fixing holes 42122, and the clamping member 4 is provided with a pair of second fixing holes 434421. A pair of fixing members pass through the first fixing holes 42122 and the second fixing holes 434421 to be fixed, so as to fixedly install the drive module 2 on the clamping member 4.

[0091] Specifically, the free end 43 of the clamping member 4 is recessed inward to form a receiving groove 431. At both ends of a diameter in the receiving groove 431, there are a first boss 432 and a second boss 433 opposite to the first boss 432. A pair of the second fixing holes 434 are respectively arranged on the first boss 432 and the second boss 433. A pair of fixing members respectively pass through the first fixing holes 22 and the second fixing holes 434 to fix the drive module 2 in the receiving groove 431.

[0092] In one embodiment, Figures 4 - 8 shown, positioning members 435 are respectively arranged on the first boss 432 and the second boss 433. A pair of positioning holes 23 are correspondingly arranged on the drive module 2. The preliminary positioning of the drive module 2 and the clamping member 4 is realized through the positioning holes 23 and the positioning members 435, which is convenient for the fixing members to pass through the first fixing holes 22 and the second fixing holes 434 for fixing.

[0093] Embodiment 2

[0094] Based on the above content, as Figures 4 - 6As shown in the figure, this embodiment provides a driving module 2, which includes a driving board. The driving board is provided with a driving chip 24 and Hall elements 25. The driving chip 24 is combined with the FOC driving unit and the PID control unit to drive and control the servo motor 3 to perform different modes of motion according to the received external command signal. The Hall elements 25 are used to detect the real-time position information of the rotor in the servo motor 3 according to the cooperation of the second magnetic part in the servo motor 3. The vibration and rotation of the servo motor 3 are controlled through the driving chip 24 and the feedback signal corresponding to the real-time position information.

[0095] Specifically, a current sampling resistor 26 is also arranged on the driving board to monitor the current flowing through the servo motor 3, so as to achieve overcurrent protection. When the load of the servo motor 3 is too large or a fault occurs, the current flowing through the servo motor 3 will increase abnormally. This overcurrent situation can be detected through the current sampling resistor 26, and by feeding back to the control circuit in the driving board, the protection mechanism is triggered to prevent damage to the circuit of the servo motor 3 or the driving board.

[0096] At the same time, when the current sampling resistor 26 is connected in series in the power supply path of the servo motor 3, when current flows through the current sampling resistor 26, a voltage proportional to the current will be generated. The voltage is read through a differential amplifier or directly by the ADC (analog-to-digital converter) of the microcontroller. The actual current flowing through the servo motor 3 is obtained based on Ohm's law. The voltage signal is input into the ADC of the driving chip 24 for sampling, and then through digital signal processing, it is used to adjust the driving signal of the servo motor 3 to achieve precise control of the vibration amplitude, vibration frequency, scanning amplitude, and scanning frequency.

[0097] In the closed-loop control strategies such as the control of the FOC driving unit and the PID control unit, combined with the setting of the current sampling resistor 26, the actual current and the actual working state of the servo motor 3 are monitored in real time, compared with the target current, and then the driving signal is adjusted to ensure that the motor operates according to the predetermined current, speed, or torque; whether the motor is stalled or the load suddenly changes is judged through the actual working state, realizing intelligent control and function diagnosis.

[0098] Preferably, the driving board and the coil in the stator part are connected by welding.

[0099] Preferably, the servo motor 3 is a three-phase motor, and three current sampling resistors 26 are arranged in the drive board. Each current sampling resistor 26 is connected in series with each phase circuit. By monitoring the currents of the three phases respectively through the three current sampling resistors 26, the detection and control of three-phase unbalance are realized, the control accuracy is improved. At the same time, when a fault occurs in a certain phase, measures are taken in time to enhance the robustness and safety of the system.

[0100] In an embodiment, the drive chip 24 and one of the current sampling resistors 26 are arranged on the first surface of the drive board, and the Hall element 25 and two of the current sampling resistors 26 are arranged on the second surface of the drive board. This avoids the situation where the area of the drive board is too large to be embedded in the receiving groove 431 of the free end 43 of the clamping member 4.

[0101] Preferably, the current sampling resistor 26 is a 20 mΩ resistor.

[0102] The following Table 1 shows the rated parameters of the integrated built-in servo drive vibration motor provided by the present utility model:

[0103] Table 1

[0104]

[0105]

[0106] The following Table 2 shows the electrical characteristic parameters of the integrated built-in servo drive vibration motor provided by the present utility model:

[0107] Table 2

[0108]

[0109] Set the experimental parameters:

[0110] The range of use temperature and humidity: Temperature: -10 to 40 °C, Relative humidity: 45 to 85%

[0111] The range of storage temperature and humidity: Temperature: -10 to 35 °C, Relative humidity: 75% MAX

[0112] The following Table 3 shows the experimental items and experimental results of the integrated built-in servo drive vibration motor provided by the present utility model under the above set experimental parameter conditions:

[0113] Table 3

[0114]

[0115]

[0116] From the content of Table 1, Table 2, and Table 3 above, it can be concluded that the integrated built-in servo-driven sweeping and vibrating motor provided by the present utility model meets or exceeds the listed standards in terms of electrical, mechanical, and environmental characteristics, demonstrating excellent performance and reliability. This motor has a high-precision sweeping and vibrating function, is driven and controlled by the FOC drive unit, has low noise and high efficiency, and can bring a comfortable and intelligent user experience to users.

[0117] The present utility model proposes a built-in servo-driven sweeping and vibrating toothbrush motor, which solves the problems of complex structure, inaccurate control, and insufficient overall design caused by the separation of the motor and drive control in the prior art. By integrating the drive module and the servo motor body into one, the internal structure of the electric toothbrush is greatly simplified. At the same time, through the coordinated drive adjustment of the FOC drive unit and the PID control unit, precise adjustment of the vibration amplitude, vibration frequency, sweeping amplitude, and sweeping frequency is achieved, thereby achieving higher cleaning efficiency and meeting personalized cleaning requirements.

[0118] In addition, by setting the current sampling resistor, overcurrent protection for the circuit in the drive module and the servo motor is realized, ensuring that the servo motor has high safety and reliability while working efficiently, and extending the service life of the product; by using the FOC drive unit and the PID control unit, the running noise of the servo motor is significantly reduced, the energy utilization efficiency is improved, and the user experience is enhanced.

[0119] In summary, the built-in servo-driven sweeping and vibrating toothbrush motor of the present utility model simplifies the structure of the electric toothbrush through integrated design and intelligent control, reduces the manufacturing cost, and also brings a more efficient, comfortable, and personalized oral cleaning experience to users.

[0120] Embodiment 3

[0121] An embodiment of the present utility model provides an electric toothbrush, which includes: the integrated built-in servo-driven sweeping and vibrating motor described in any of the above embodiments.

[0122] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. One-piece built-in servo-driven sweeping and vibrating motor, characterized in that The motor includes: a servo motor (3), a drive module (2), and a housing (1). The servo motor (3) is installed inside the housing (1) and is used to generate a sweeping and vibrating action. The drive module (2) is installed at the bottom (15) of the housing (1) and is connected to the servo motor (3) for receiving signals to drive and control the rotation of the servo motor (3). Wherein, the housing (1) is cylindrical, and the housing (1) further includes a clamping member (4). The clamping member (4) is arranged between the drive module (2) and the servo motor (3). One end of the clamping member (4) is inserted and fixed to the bottom (15) of the housing (1) and contacts one end of the servo motor (3). The drive module (2) is installed at the end of the clamping member (4) away from the servo motor (3).

2. The integrated built-in servo drive vibration motor according to claim 1, characterized in that A pair of insertion ports (11) are symmetrically arranged on the housing (1). The clamping member (4) is symmetrically provided with a pair of outwardly extending clamping strips (41). When the housing (1) and the clamping member (4) are inserted and installed, the clamping strips (41) are clamped and fixed to the insertion ports (11).

3. The integrated built-in servo-driven sweeping and vibrating motor according to claim 2, wherein The clamping member (4) includes an insertion end (42) inserted and fixed to the bottom (15) of the housing (1) and a free end (43) away from the insertion end (42). The diameter of the insertion end (42) is smaller than the size of the free end (43). The diameter of the free end (43) is greater than or equal to the diameter of the housing (1). The servo motor (3) further includes a first bearing. A fixing hole (421) is provided at the center of the insertion end (42), and the first bearing is arranged in the fixing hole (421). The free end (43) is recessed inward for installing the drive module (2).

4. The integrated built-in servo drive vibration-sweeping motor according to claim 3, characterized in that, The integrated built-in servo-driven sweeping and vibrating motor further includes an annular baffle (12). The annular baffle (12) is arranged at the end of the housing (1) away from the clamping member (4).

5. The integrated built-in servo drive vibration motor according to any one of claims 2-4, characterized in that, The servo motor (3) includes a stator member and a rotor member. The drive module (2) is connected to the stator member by welding for detecting the rotor member according to the stator member and feeding back the real-time position of the rotor member to the drive module.

6. The integrated built-in servo drive vibration motor according to claim 5, wherein The servo motor (3) further includes a first magnetic member. The drive module includes a first sensor. The first sensor is used to detect the real-time position of the rotor member according to the magnetic field on the first magnetic member and generate a feedback signal.

7. The integrated built-in servo drive vibration motor according to claim 6, wherein The drive module (2) includes an FOC drive unit and a PID control unit. The FOC drive unit is used to adjust the current phase on the stator member according to the feedback signal generated by the first sensor to control the magnetic flux and torque of the servo motor (3). The PID control unit is used to adjust the motion mode of the servo motor (3) according to the received command signal and the feedback signal generated by the first sensor.

8. The integrated built-in servo-driven sweeping and vibrating motor according to claim 7, wherein, The driving module (2) is provided with a pair of first fixing holes (22), and the clamping member (4) is provided with a pair of second fixing holes (434). A pair of fixing members pass through the first fixing holes (22) and the second fixing holes (434) for fixing, so as to fixedly mount the driving module (2) on the clamping member (4).

9. An electric toothbrush, characterized in that, The electric toothbrush includes the integrated built-in servo drive brushing and vibrating motor according to any one of claims 1 to 8.

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