Electric toothbrush cleaning power evaluation system and method, control device

Abstract

The application discloses a kind of electric toothbrush cleaning power evaluation system and method, control device, it is related to electric toothbrush cleaning power evaluation technical field, system includes pressure assembly and swing detection component, method includes: when brush head swings, control pressure assembly abuts brush head to exert multiple preset simulated brushing pressure, while using laser detection corresponding swing;Combining bristle height and working frequency, calculate bristle endpoint single motion trajectory length and cleaning path length in unit time.The technical scheme provided by the application can solve the problem that the prior art analyzes the pressure and swing separately, fails to simulate the coupling relationship between the deformation of the bristles under different pressures and the shortening of the effective stroke, thereby unable to accurately quantify the actual cleaning path length under a specific pressure, resulting in the evaluation result being difficult to truly reflect the actual cleaning efficiency of the electric toothbrush under different forces.

Description

Technical Field

[0001] This invention relates to the field of electric toothbrush cleaning power assessment technology, and in particular to an electric toothbrush cleaning power assessment system, method and control device. Background Technology

[0002] As a common oral care tool, the cleaning effect of electric toothbrushes mainly depends on the oscillation amplitude of the brush head driven by the motor and the force generated when the bristles contact the tooth surface. Existing electric toothbrush performance tests usually focus on measuring the vibration frequency or maximum oscillation angle of the motor when it is not under load, or using simple pressure sensors to detect whether the user's pressure is too high to trigger overload protection. However, the above-mentioned conventional testing methods often analyze pressure and oscillation amplitude separately, failing to simulate the coupling relationship between the deformation of the bristles under different pressure during actual brushing and the resulting reduction in the effective oscillation stroke. This makes it impossible to accurately quantify the actual cleaning path length swept by the bristle tip under a specific simulated brushing pressure, making it difficult for the evaluation results to truly reflect the actual cleaning efficiency of electric toothbrushes under different usage intensities. Summary of the Invention

[0003] The main objective of this invention is to propose an electric toothbrush cleaning power evaluation system, method, and control device. This aims to solve the problem that existing technologies analyze pressure and amplitude separately, failing to simulate the coupling relationship between bristle deformation and effective stroke shortening under different pressures. Consequently, they cannot accurately quantify the actual cleaning path length under a specific pressure, making it difficult for the evaluation results to truly reflect the actual cleaning efficiency of the electric toothbrush under different intensities.

[0004] To achieve the above objectives, the present invention proposes an electric toothbrush cleaning power evaluation method for use in an electric toothbrush cleaning power evaluation system. The electric toothbrush includes a handle and a brush head having opposing first and second sides. The electric toothbrush cleaning power evaluation system includes a pressure application component and a swing amplitude detection component. The pressure application component has an abutment surface, a first position where the abutment surface is separated from the second side of the brush head, and a second position where the abutment surface abuts against the second side of the brush head, and is configured to be movable and switchable between the first position and the second position.

[0005] The method for evaluating the cleaning power of an electric toothbrush includes: When the brush head swings, the pressure application component is controlled to move from the first position to the second position, so that the contact surface abuts against the second side of the brush head, so as to apply multiple preset simulated brushing pressures to the brush head, and the swing amplitude detection component is controlled to emit a laser towards the first side of the brush head; The reflected signal generated by the laser reflected by the brush head is obtained, and the swing amplitude corresponding to a plurality of preset simulated brushing pressures is determined according to the reflected signal; The height of the brush head bristles and the preset operating frequency of the electric toothbrush are obtained. Based on the bristle height and the swing amplitude, the length of the motion trajectory of the bristle tip of the brush head during a single swing is calculated. Multiplying the length of the motion trajectory by the preset working frequency yields the cleaning path length of the brush head bristle tip per unit time under the corresponding preset simulated brushing pressure.

[0006] In one embodiment, the pressure application assembly includes a pressure head, a driving member, and a pressure detection member, wherein the pressure detection member is connected between the driving member and the pressure head; The step of controlling the pressure application component to move from the first position to the second position when the brush head is oscillating, so that the contact surface abuts against the second side of the brush head, to apply multiple preset simulated brushing pressures to the brush head, and controlling the oscillation detection component to emit a laser towards the first side of the brush head includes: When the brush head is oscillating, the driving member is controlled to drive the pressure head to move from the first position to the second position, so that the contact surface abuts against the second side of the brush head, thereby applying multiple preset simulated brushing pressures to the brush head; The pressure value applied by the pressure head to the brush head is obtained through the pressure detection device; Based on the difference between the pressure value and the preset simulated brushing pressure, the output power of the drive component is adjusted so that the pressure value reaches a plurality of the preset simulated brushing pressures. When each preset simulated brushing pressure is reached, the swing amplitude detection component is controlled to emit a laser towards the first side of the brush head to obtain a reflected signal corresponding to a plurality of preset simulated brushing pressures.

[0007] In one embodiment, the pressure application assembly further includes a transparent component and a camera component. The pressure application head is provided with a fixing groove corresponding to the position of the contact surface. The transparent component is disposed in the fixing groove, and the camera component is disposed facing the transparent component. The method for evaluating the cleaning power of electric toothbrushes also includes: The camera captures the oscillation trajectory of the brush head through the transparent part; The oscillation speed of the brush head is determined based on the obtained oscillation trajectory of the brush head.

[0008] In one embodiment, determining the oscillation speed of the brush head based on the acquired oscillation trajectory of the brush head includes: Extract the displacement sequence of the preset feature points on the brush head within at least one complete oscillation cycle from the oscillation trajectory; Based on the displacement sequence and the shooting frame rate of the camera, the average linear velocity of the preset feature points is calculated, and the average linear velocity is used as the oscillation speed of the brush head.

[0009] In one embodiment, after determining the oscillation speed of the brush head based on the acquired oscillation trajectory of the brush head, the method further includes: Based on the oscillation speed, the preset simulated brushing pressure, and the operating current and voltage of the electric toothbrush, calculate the energy loss rate of the electric toothbrush under the current preset simulated brushing pressure. The energy loss rate is compared with a preset energy efficiency threshold. If the energy loss rate is not greater than the preset energy efficiency threshold, then the electric toothbrush is determined to meet the factory energy efficiency standard. If the energy loss rate is greater than the preset energy efficiency threshold, then the electric toothbrush is determined to not meet the factory energy efficiency standard.

[0010] In one embodiment, the contact surface is a flexible and deformable surface, and the electric toothbrush cleaning power evaluation method further includes: After the pressure-applying component moves to the second position, an image of the deformation area of ​​the flexible deformable surface due to contact with the brush head is obtained; Based on the deformation region image, determine the actual contact area and contact pressure distribution cloud map between the flexible deformable surface and the second side of the brush head; Based on the contact pressure distribution cloud map, weighted values ​​are assigned to multiple different regions of the brush head to obtain differentiated region pressure values ​​corresponding to the preset simulated brushing pressure. The calculation of the trajectory length of the brush head's bristle tip during a single oscillation, based on the bristle height and the oscillation amplitude, includes: Based on the pressure values ​​of the differentiated regions, the sub-motion trajectory lengths of the bristle endpoints corresponding to different regions of the brush head are calculated respectively, and a weighted sum is performed based on the actual contact area to obtain the motion trajectory length.

[0011] In one embodiment, the electric toothbrush cleaning power evaluation method further includes: During the process of the contact surface abutting against the second side of the brush head and applying any of the preset simulated brushing pressures to the brush head, the oscillation speed curve of the brush head is obtained; Based on the oscillation speed curve, determine the peak and trough values ​​of the brush head's speed within the oscillation cycle; When the difference between the peak speed and the valley speed exceeds a preset speed fluctuation threshold, the pressure of the pressure application component on the brush head is adjusted so that the oscillation speed of the brush head is within a preset oscillation speed range within the oscillation cycle, and the length of the motion trajectory is calculated based on the adjusted oscillation speed.

[0012] In one embodiment, the electric toothbrush cleaning power evaluation method further includes: Obtain the bending deformation parameters of the brush head bristles under different preset simulated brushing pressures; Obtain the three-dimensional contour data of the preset bionic tooth model; Based on the bending deformation parameters, the swing amplitude, and the three-dimensional contour data of the bionic tooth model, the instantaneous contact trajectory and contact force of the brush tip sliding across the surface of the bionic tooth model are calculated. Based on the instantaneous contact trajectory and contact force, calculate the work done by the brush tip on a unit area of ​​the surface of the bionic tooth model.

[0013] The present invention also proposes a control device, including a processor and a memory, wherein the memory stores an electric toothbrush cleaning power evaluation control program, and when the electric toothbrush cleaning power evaluation control program is executed by the processor, the electric toothbrush cleaning power evaluation method described above is implemented.

[0014] The present invention also proposes an electric toothbrush cleaning power evaluation system, wherein the electric toothbrush includes a handle and a brush head having opposing first and second sides; the electric toothbrush cleaning power evaluation system includes: The pressure application component has an abutment surface, a first position in which the abutment surface is separated from a second side of the brush head, and a second position in which the abutment surface abuts against the second side of the brush head, and is configured to be movable and switchable between the first position and the second position; An amplitude detection component is used to emit a laser towards a first side of the brush head; The control device described above is electrically connected to the pressure application component and the swing detection component, respectively.

[0015] The technical solution of this invention involves controlling the pressure-applying component to abut against the brush head to apply multiple preset simulated brushing pressures during brush head oscillation, while simultaneously using laser detection of the corresponding oscillation amplitude. Combining bristle height and operating frequency, the invention calculates the length of a single movement trajectory of the bristle tip and the length of the cleaning path per unit time. This invention solves the problem of existing technologies analyzing pressure and oscillation amplitude separately, failing to simulate the coupling relationship between bristle deformation and the resulting reduction in effective stroke under different pressures. Consequently, it cannot accurately quantify the actual cleaning path length under a specific pressure, leading to evaluation results that do not truly reflect the actual cleaning efficiency of the electric toothbrush under different pressures. Attached Figure Description

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

[0017] Figure 1 A schematic diagram of an embodiment of the electric toothbrush cleaning power evaluation system provided by the present invention; Figure 2 for Figure 1 A structural diagram from another angle; Figure 3 for Figure 2 A magnified view of a section at point A in the middle; Figure 4 A flowchart of an embodiment of the electric toothbrush cleaning power evaluation method provided by the present invention; Figure 5 A flowchart of another embodiment of the electric toothbrush cleaning power evaluation method provided by the present invention; Figure 6 A flowchart of yet another embodiment of the electric toothbrush cleaning power evaluation method provided by the present invention; Figure 7 A flowchart of yet another embodiment of the electric toothbrush cleaning power evaluation method provided by the present invention; Figure 8 A flowchart of another embodiment of the electric toothbrush cleaning power evaluation method provided by the present invention; Figure 9 A flowchart of yet another embodiment of the electric toothbrush cleaning power evaluation method provided by the present invention; Figure 10 A flowchart of yet another embodiment of the electric toothbrush cleaning power evaluation method provided by the present invention; Figure 11 A flowchart of another embodiment of the electric toothbrush cleaning power evaluation method provided by the present invention; Figure 12 A flowchart of yet another embodiment of the electric toothbrush cleaning power evaluation method provided by the present invention; Figure 13 A schematic diagram of the circuit functional modules of an embodiment of the control device provided by the present invention.

[0018] Explanation of icon numbers: 100. Electric toothbrush cleaning power assessment system; 10. Support component; 20. First clamping component; 30. Swing amplitude detection component; 31. First swing amplitude detection component; 32. Second swing amplitude detection component; 40. Pressure application component; 401. Fixing groove; 402. Detection groove; 41. Driving component; 42. Pressure detection component; 43. Pressure application head; 44. Transparent component; 45. Clamping component; 46. Control device; 461. Processor; 462. Memory; 47. Display component; 50. First motion module ; 51, slide table; 511, guide protrusion; 512, first protrusion; 513, second protrusion; 52, slider; 60, second motion module; 61, first mounting component; 62, second mounting component; 63, lead screw; 64, slide rail; 70, locking module; 71, second clamping component; 72, locking component; 80, first guide component; 90, second guide component; 200, electric toothbrush; 210, brush handle; 220, brush head; x, first direction; y, second direction; z, third direction.

[0019] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] As a common oral care tool, the cleaning effect of an electric toothbrush 200 mainly depends on the oscillation amplitude of the brush head 220 driven by the motor and the force generated when the bristles contact the tooth surface. Existing performance tests of electric toothbrushes 200 usually focus on measuring the vibration frequency or maximum oscillation angle of the motor when it is not under load, or using a simple pressure sensor to detect whether the user's pressure is too high to trigger overload protection. However, the above-mentioned conventional testing methods often analyze pressure and oscillation amplitude separately, failing to simulate the coupling relationship between the deformation of the bristles under different pressure during actual brushing and the resulting reduction in the effective oscillation stroke. This makes it impossible to accurately quantify the actual cleaning path length swept by the bristle tip under a specific simulated brushing pressure, making it difficult for the evaluation results to truly reflect the actual cleaning efficiency of the electric toothbrush 200 under different usage intensities.

[0022] To address this issue, the present invention proposes a method for evaluating the cleaning power of an electric toothbrush. This method aims to solve the problem that existing technologies analyze pressure and amplitude separately, failing to simulate the coupling relationship between bristle deformation and the resulting reduction in effective stroke under different pressures. Consequently, it is impossible to accurately quantify the actual cleaning path length under a specific pressure, leading to evaluation results that fail to truly reflect the actual cleaning efficiency of the electric toothbrush 200 under different intensities.

[0023] Please see Figures 1 to 3 In one embodiment of the present invention, the electric toothbrush 200 includes a handle 210 and a brush head 220 having opposing first and second sides; the electric toothbrush cleaning power assessment system 100 includes: The pressure application component 40 has an abutting surface, a first position in which the abutting surface is separated from the second side of the brush head 220, and a second position in which the abutting surface abuts against the second side of the brush head 220, and is configured to be movable and switchable between the first position and the second position; Amplitude detection component 30 is used to emit a laser to the first side of the brush head 220.

[0024] In this embodiment, the electric toothbrush cleaning power evaluation system 100 is mainly used to evaluate the cleaning power of the electric toothbrush 200 in a laboratory or production line environment. The electric toothbrush 200 generally includes a handle 210 and a brush head 220 detachably connected to the handle 210. A drive motor may be disposed within the handle 210 and drivenly connected to the brush head 220 to drive the brush head 220 to rotate. The brush head 220 has a first side and a second side facing each other; the first side is positioned towards the amplitude detection component 30, while the second side is positioned towards the pressure application component 40.

[0025] The electric toothbrush cleaning power assessment system 100 may include a support component 10, a first clamping component 20, a pressure application component 40, and a swing amplitude detection component 30, wherein: The support component 10 serves as the basic structure of the entire electric toothbrush cleaning power evaluation system 100. It provides a stable mounting platform for the first clamping component 20, the pressure application component 40, and the swing amplitude detection component 30, ensuring that the relative positional relationship of each functional module remains unchanged during the test, thereby guaranteeing the consistency and repeatability of the evaluation.

[0026] The first clamping member 20 is fixed to the support assembly 10 and is used to clamp the handle 210 of the electric toothbrush 200, so that the electric toothbrush 200 will not be displaced due to vibration or external force interference during the test, thereby avoiding interference with the swing amplitude of the brush head 220. Figures 1 to 3 As shown, in one embodiment, the first clamping member 20 may include clamping structures, and at least two clamping structures are provided. The at least two clamping structures are spaced apart to form clamping positions, which are adapted to clamp the handle 210 of the electric toothbrush 200.

[0027] like Figures 1 to 3 As shown, in one embodiment, the pressure application component 40 includes a pressure application head 43, a transparent element 44, and a camera element. The pressure application head 43, as the end-effector directly contacting the brush head 220, has an abutment surface. The pressure application head 43 is movably switchable on the support component 10 and has two distinct working positions: when in the first position, the abutment surface remains separated from the second side of the brush head 220, allowing the brush head 220 to vibrate freely without any external resistance, facilitating the acquisition of the brush head 220's reference swing amplitude; when switched to the second position, the abutment surface abuts against the second side of the brush head 220 to apply a preset simulated brushing pressure to the brush head 220. This preset simulated brushing pressure corresponds to the reaction force generated by the teeth and gums on the bristles during typical daily brushing by a user, thereby reproducing a force state close to real-world use in testing. The preset simulated brushing pressure can be no less than 0.5 Newtons and no more than 3.5 Newtons, for example, 1.5 Newtons and any value within the aforementioned range.

[0028] like Figures 1 to 3 As shown, in one embodiment, the pressure head 43 has a fixing groove 401 at the position corresponding to the contact surface for embedding the transparent element 44. The transparent element 44 can be made of optical glass or a high-transmittance polymer material, possessing good light transmittance and mechanical stability. While withstanding the preset simulated brushing pressure, it will not obstruct the view or interfere with optical observation. Specifically, the opening of the fixing groove 401 is oriented towards the first direction x, and the camera is oriented towards the transparent element 44 along the third direction z. Thus, the camera can directly observe and record the movement of the brush head 220 under pressure through the transparent element 44, avoiding obstruction of the imaging path by the pressure head 43. The camera is located on the support assembly 10 and can be a high-speed camera or other image acquisition device with high frame rate shooting capabilities, capable of continuously recording the movement of the brush head 220 during the high-frequency vibration of the electric toothbrush 200. Through post-processing image processing or real-time analysis software, the displacement change of the brush head 220 end per unit time can be extracted from the acquired continuous image sequence, thereby calculating its oscillation trajectory. During actual testing, the drive motor inside the brush handle 210 drives the brush head 220 to rotate. At this time, the pressure head 43 is in the first position, and its contact surface is separated from the second side of the brush head 220. Subsequently, the camera can capture the reference movement trajectory of the brush head 220 through the transparent part 44. After the reference movement trajectory is acquired, the pressure head 43 can move from the first position to the second position, and its contact surface contacts and abuts against the brush head 220 to apply a preset simulated brushing pressure to the brush head 220. The camera can capture the oscillation trajectory of the brush head 220 through the transparent part 44.

[0029] like Figures 1 to 3 As shown, in one embodiment, the pressure application component 40 further includes: The drive element 41, located on the support assembly 10, is used to drive the pressure head 43 to be movably switched between a first position and a second position to separate from or abut against the brush head 220.

[0030] In this embodiment, the driving component 41 serves as the power execution unit of the pressure application assembly 40. Its function is to drive the pressure head 43 to reciprocate along the third direction z, thereby achieving contact or separation with the second side of the brush head 220. The driving component 41 can be a cylinder, electric push rod, stepper motor with lead screw, or other driving mechanism. Its installation position is fixed on the support assembly 10 to ensure stability and repeatability during operation. The pressure head 43 is integrated into the output end of the driving component 41 and is used for setting the bristles towards the brush head 220. When the driving component 41 is in the initial state, the pressure head 43 is in the first position, maintaining a certain distance from the brush head 220. At this time, the brush head 220 can vibrate freely without external resistance, which is convenient for collecting the reference motion trajectory under no-load conditions. When the driving component 41 starts and pushes the pressure head 43 to move along the third direction z to the second position, the pressure head 43 contacts and abuts against the brush head 220 to apply a preset simulated brushing pressure to the brush head 220. By precisely controlling the stroke of the pressure head 43 through the drive component 41, the pressure applied in each test can be kept consistent, thereby improving the repeatability and comparability of the swing trajectory measurement under load conditions. At the same time, it avoids operational errors or pressure fluctuations caused by manual pressure application, making the load simulation closer to the real use scenario.

[0031] like Figures 1 to 3 As shown, in one embodiment, the pressure application component 40 further includes: Pressure detection element 42 is disposed on drive element 41 and located between drive element 41 and pressure head 43, and is used to detect the pressure applied to brush head 220 by pressure head 43; Control device 46 is electrically connected to drive element 41 and pressure detection element 42; The display 47 is electrically connected to the control device 46, which controls the display 47 to display the pressure detected by the pressure detection element 42.

[0032] In this embodiment, the pressure detection element 42 is connected to both the drive element 41 and the pressure head 43. The pressure detection element 42 may integrate a force sensor or strain gauge, etc., to sense the transmitted force value in real time as the pressure head 43 abuts against the brush head 220 and applies a preset simulated brushing pressure. This force signal is then converted into an electrical signal and output to the control device 46. The control device 46 receives and processes this signal, and drives the display element 47 to visually present the applied pressure value in digital or graphical form. Operators can monitor and confirm in real time whether the applied pressure conforms to the preset simulated brushing pressure range, thereby ensuring the consistency and controllability of the load test conditions and further improving the comparability and reliability of the oscillation trajectory results across different test batches or devices.

[0033] like Figures 1 to 3 As shown, in one embodiment, one end of the pressure detection element 42 along the first direction x is disposed on the driving element 41, and the other end is disposed corresponding to the position of the transparent element 44. The pressure detection element 42 is provided with a detection groove 402 corresponding to the position of the transparent element 44, and the camera is disposed facing the detection groove 402.

[0034] In this embodiment, the end of the pressure detection element 42 closest to the drive element 41 is structurally supported by the drive element 41, while the other end away from the drive element 41 supports the pressure head 43 and the transparent element 44 embedded in the pressure head 43. The position of the transparent element 44 is aligned with the detection groove 402 on the pressure detection element 42 in the optical path, so that the camera arranged from one side of the support assembly 10 can pass through the detection groove 402 and the transparent element 44 in a straight field of view, clearly capturing the image of the brush head 220 located above the transparent element 44. Since the camera path passes through the detection groove 402 of the pressure detection element 42 and the transparent element 44 on the pressure head 43, the entire optical path remains unobstructed under pressure, allowing unobstructed observation of the actual movement state of the brush head 220 even under simulated brushing pressure. This enables the simultaneous observation of the force state and image acquisition in the electric toothbrush cleaning power evaluation system 100, helping to improve the analysis accuracy and data reliability of the movement behavior of the brush head 220 under near-real-world usage conditions.

[0035] like Figures 1 to 3 As shown, in one embodiment, the pressure application component 40 further includes: Two clamping members 45 are arranged opposite each other along the second direction y on the side of the pressure head 43 away from the pressure detection member 42. One end of the two clamping members 45 along the first direction x is fixed to the pressure head 43, and the other end abuts against the transparent member 44 to lock the transparent member 44 in the fixing groove 401.

[0036] In this embodiment, a fixing groove 401 is formed on the side of the pressure head 43 facing the first direction x. This fixing groove 401 is used to embed the transparent part 44, so that its front face faces the brush head 220, providing a clear optical channel for camera observation. To ensure that the transparent part 44 remains stable during the test and does not shift or fall off due to vibration or pressure, two clamping members 45 are provided on the side of the pressure head 43 away from the pressure detection member 42. The two clamping members 45 are arranged opposite each other along the second direction y. One end of the two clamping members 45 along the first direction x is fixedly connected to the pressure head 43, and the other end abuts against the edge area of ​​the transparent part 44, thereby pressing the transparent part 44 and confining it within the fixing groove 401. In this way, the transparent part 44 can be prevented from loosening during high-frequency vibration or repeated pressure, and its central viewing window area used for imaging will not be obstructed, ensuring the reliability of the camera in continuously and clearly capturing the swing trajectory of the brush head 220 through the transparent part 44. At the same time, since the clamping force is applied to the periphery of the transparent part 44 rather than its surface, the risk of optical distortion or material damage caused by local stress concentration can also be reduced.

[0037] In existing technologies, the measurement of the oscillation amplitude of the brush head 220 of an electric toothbrush 200 is usually performed under no-load or non-simulated real-world conditions, making it difficult to reflect the changes in the brush head 220's movement caused by pressure applied during actual brushing. Furthermore, because the brush head 220 vibrates or oscillates at high frequency during operation, and its oscillation behavior is complex, using only a single-direction detection beam for measurement makes it difficult to accurately capture the true three-dimensional oscillation behavior of the brush head 220 under pressure, thus affecting the accuracy of the oscillation amplitude measurement.

[0038] To improve this problem, such as Figures 1 to 3 As shown, in one embodiment, the brush head 220 has opposing first and second sides, and the electric toothbrush cleaning power assessment system 100 further includes: The swing amplitude detection component 30 includes a first swing amplitude detection element 31 and a second swing amplitude detection element 32, which are respectively disposed on the support component 10. The first swing amplitude detection element 31 is used to emit a first laser to the first side of the brush head 220, and the second swing amplitude detection element 32 is used to emit a second laser to the first side of the brush head 220 to detect the swing amplitude of the brush head 220. The emission direction of the first laser and the emission direction of the second laser are set at an angle.

[0039] In this embodiment, the amplitude detection component 30 includes a first amplitude detection element 31 and a second amplitude detection element 32, which are respectively disposed on the support component 10 and emit laser light towards the first side of the brush head 220 to detect the amplitude of the brush head 220. The first side of the brush head 220 is the side facing away from the bristles, and the second side is the side facing the bristles. The amplitude detection component 30 acquires the position change of the reflected light spot on the surface of the brush head 220 caused by the swing in real time through a non-contact optical method, thereby accurately reflecting its amplitude during operation. In one embodiment, the amplitude detection component 30 also includes a reflector and a detection ruler. The reflector is attached to the first side of the brush head 220, the first amplitude detection element 31 and the second amplitude detection element 32 are implemented using a laser emitter, and the detection ruler is horizontally disposed between the reflector and the laser emitter, with scale lines and a perforation at the standard scale position. In the detection state, the laser light emitted by the laser emitter passes through the perforation and illuminates the reflector, and after reflection, is projected onto the scale line of the detection ruler. As the brush head 220 swings, the reflector deflects accordingly, causing the position of the reflected light spot on the measuring scale to change. This change corresponds to the actual swing amplitude of the brush head 220. The swing amplitude of the brush head 220 can be indirectly obtained by reading the range of movement of the light spot on the scale line.

[0040] It should be noted that the first amplitude detection element 31 emits a first laser beam towards the first side of the brush head 220, and controls the second amplitude detection element 32 to emit a second laser beam towards the first side of the brush head 220. The emission directions of the first and second laser beams are set at an angle. This is because when the brush head 220 swings under pressure, its movement includes not only reciprocating displacement along a fixed axis, but may also be accompanied by slight tilting or twisting. If only one direction of laser is used for illumination, the displacement of the reflected light spot on the detection scale can only reflect the projection change in that direction, and cannot fully characterize the overall amplitude of the brush head 220. By illuminating the first side of the brush head 220 with two laser beams at an angle, the two reflected light beams can form independent and interconnected light spot displacements on their respective detection scales. Combining the positional changes reflected by the above two sets of light spot displacements, the actual amplitude of the brush head 220 under pressure can be more comprehensively restored, improving the accuracy and stability of the measurement results.

[0041] Through the above structural integration, the same electric toothbrush cleaning power evaluation system 100 can switch between loaded and unloaded states and simultaneously acquire the swing amplitude of the brush head 220 under the corresponding working conditions. This solves the problem in the prior art that it is impossible to compare and analyze the load influence and uncontrollable pressure on the same electric toothbrush cleaning power evaluation system 100, and improves the accuracy of the electric toothbrush 200 swing amplitude test and the realism of the load simulation.

[0042] like Figures 1 to 3 As shown, in one embodiment, the electric toothbrush cleaning power assessment system 100 further includes: A first motion module 50 is provided with a first clamping member 20 for driving the first clamping member 20 to reciprocate along a first direction x. The second motion module 60 is disposed on the support assembly 10. The second motion module 60 is provided with the first motion module 50, which is used to drive the first clamping member 20 to reciprocate along the second direction y.

[0043] In this embodiment, the first motion module 50 directly supports the first clamping member 20 and can drive it to move linearly back and forth along the first direction x; the second motion module 60 is fixed on the support component 10 and is used to install the entire first motion module 50, thereby driving the first clamping member 20 and the electric toothbrush 200 it clamps to move independently in a linear reciprocating motion along the second direction y. Through this hierarchical arrangement, the first clamping member 20 can achieve precise positioning at any position in the plane defined by the first direction x and the second direction y. This structural design allows the operator to flexibly adjust the position of the electric toothbrush 200 in the plane according to the relative layout of the swing detection component 30, the pressure application component 40 and the camera component, ensuring that the first side of the brush head 220 is accurately aligned with the laser incident point, while ensuring that the second side of the brush head 220 is precisely aligned with the force center located on the pressure application head 43 and the observation window of the transparent component 44. Especially when testing with different models or sizes of electric toothbrushes 200, this two-dimensional adjustment capability can effectively compensate for assembly deviations caused by differences in product shape, improving the versatility and repeatability of the testing device.

[0044] like Figures 1 to 3As shown, in one embodiment, the first motion module 50 includes a slide table 51 and a slider 52 disposed on the slide table 51. The slide table 51 has two oppositely arranged guide protrusions 511 along the second direction y. The slider 52 has two first sliding grooves, which are slidably engaged with the two guide protrusions 511 respectively, so that the slider 52 can reciprocate relative to the slide table 51 along the first direction x. A first clamping member 20 is disposed on the slider 52. The second motion module 60 includes a first mounting member 61, a second mounting member 62, a lead screw 63, and two slide rails 64. The first mounting member 61 and the second mounting member 62 are spaced apart along the second direction y, and the two slide rails 64 are connected to the first mounting member 61 and the second mounting member 62. The second mounting members 62 are arranged between each other and extend along the first direction x. The lead screw 63 is connected between the first mounting member 61 and the second mounting member 62 and is located between the two slide rails 64 and is arranged opposite to the two slide rails 64. The slide table 51 has a first protrusion 512 and two second protrusions 513 on the side away from the sliding member 52. The first protrusion 512 has an internal thread that engages with the external thread of the lead screw 63. The two second protrusions 513 are respectively engaged with the two slide rails 64. When the lead screw 63 rotates, the slide table 51 moves along the second direction y through the engagement of the internal and external threads, driving the two second protrusions 513 to slide along the two slide rails 64, so that the slide table 51 reciprocates along the second direction y.

[0045] In this embodiment, the slider 52 in the first motion module 50 forms a sliding pair with two guide protrusions 511 extending along the second direction y on the slide table 51 through its first sliding groove, so that the slider 52 can slide along the first direction x on the surface of the slide table 51, and the first clamping member 20 fixed on the slider 52 moves synchronously, thereby driving the clamped electric toothbrush 200 to be finely adjusted along the first direction x. The second motion module 60 serves as the foundation platform supporting the entire first motion module 50. Through the coordinated action of the lead screw 63 and the slide rail 64, it achieves driving and guidance along the second direction y. The lead screw 63 is driven to rotate by an external motor or a manual knob. Its external thread engages with the internal thread of the first protrusion 512 at the bottom of the slide table 51, converting the rotational motion into linear displacement of the slide table 51 along the second direction y. The two second protrusions 513 on both sides of the slide table 51 slide in cooperation with two parallel slide rails 64, which not only provide stable support for the slide table 51, but also effectively limit its sway or shaking during the movement, ensuring the linearity of the overall movement trajectory and the repeatability of the positioning accuracy.

[0046] By integrating the first motion module 50 and the second motion module 60, the operator can independently control the position of the electric toothbrush 200 in the first x direction and the second y direction, aligning its brush head 220 with the laser incident point of the amplitude detection component 30, the force application center of the pressure application component 40, and the observation window of the transparent component 44. This is particularly suitable for testing electric toothbrushes 200 of different brands, models, or sizes, enabling rapid alignment calibration without changing the fixtures, thus improving the adaptability, testing efficiency, and data consistency of the testing device.

[0047] like Figures 1 to 3 As shown, in one embodiment, the electric toothbrush cleaning power assessment system 100 further includes: The locking module 70 includes a second clamping member 71 and a locking member 72. The second clamping member 71 is fixed to the side of the first mounting member 61 opposite to the second mounting member 62 and is arranged around the lead screw 63. The second clamping member 71 is provided with a threaded hole, and the locking member 72 passes through the threaded hole and is threadedly engaged with the threaded hole. The clamping force of the second clamping member 71 on the lead screw 63 increases with the depth of the locking member 72 screwed into the threaded hole, so as to restrict the rotation of the lead screw 63.

[0048] In this embodiment, the locking module 70 functions to lock the position of the lead screw 63, thereby preventing unexpected slight rotation due to device vibration, external disturbance, or reaction forces generated during testing after the position adjustment of the electric toothbrush 200 is completed. The second clamping member 71 is fixed to the side of the first mounting member 61 opposite to the second mounting member 62 and is arranged around the lead screw 63 in a wrapping manner. Its structure can be a split type or an elastic ring with an opening, and its internal contour is adapted to the outer peripheral surface of the lead screw 63. When the locking member 72 is screwed into the threaded hole, its end gradually applies radial pressure to the surface of the lead screw 63, causing the second clamping member 71 to elastically deform or tighten, thereby enhancing its clamping force on the lead screw 63. As the screwing depth of the locking member 72 increases, the clamping force gradually increases until it is sufficient to effectively suppress the free rotation of the lead screw 63. In this way, after the electric toothbrush 200 completes two-dimensional positioning, the entire first clamping member 20, together with the clamped electric toothbrush 200, can be stably maintained in the test position, avoiding the slide 51 from drifting in the second direction y due to the loosening of the lead screw 63, thereby ensuring that the brush head 220 is always accurately aligned with the laser incident point of the swing amplitude detection component 30, the force application center of the pressure application component 40, and the observation window of the transparent member 44 during the test.

[0049] like Figures 1 to 3 As shown, in one embodiment, the electric toothbrush cleaning power assessment system 100 further includes: A first guide member 80 is disposed on the support assembly 10 and extends along the first direction x. The first guide member 80 is slidably engaged with the swing amplitude detection assembly 30 to drive the swing amplitude detection assembly 30 to slide back and forth on the first guide member 80 along the first direction x.

[0050] In this embodiment, the first guide member 80 can be in the form of a guide rail, a slide groove, or parallel guide rods, and is fixedly installed on the support assembly 10, ensuring that its extension direction is consistent with the first direction x. The amplitude detection assembly 30 forms a sliding pair with the first guide member 80 through a slider, a sliding sleeve, or other adaptable structure, allowing it to move along the first direction x under the action of an external drive (such as a manual adjustment knob, a micro motor, or a lead screw mechanism). The operator can adjust the relative position of the amplitude detection assembly 30 in the first direction x according to the specific size of the electric toothbrush 200 being tested or the position of the brush head 220, thereby ensuring that the laser emitter is accurately aligned with the first side of the brush head 220 to obtain the optimal light path incident angle and reflected signal intensity.

[0051] like Figures 1 to 3 As shown, in one embodiment, the electric toothbrush cleaning power assessment system 100 further includes: The second guide member 90 extends along a third direction z. The second guide member 90 is slidably engaged with the first guide member 80 to drive the second guide member 90 to slide back and forth along the first direction x on the first guide member 80, and is slidably engaged with the swing amplitude detection component 30 to drive the swing amplitude detection component 30 to slide back and forth along the third direction z on the second guide member 90.

[0052] In this embodiment, the second guide member 90 serves as the motion carrier of the swing amplitude detection component 30 in the third direction z. Its overall structure can be in the form of a guide rail, a slide rod, or a support beam with a sliding groove, extending along the third direction z, which is perpendicular to the first direction x and the second direction y. The second guide member 90 forms a sliding connection with the first guide member 80 through its bottom, for example, through a slider, a sliding sleeve, or a fitting structure, allowing it to slide relative to the first guide member 80, thus enabling it to move as a whole in the first direction x under the guidance of the first guide member 80. Simultaneously, the swing amplitude detection component 30 is mounted on the second guide member 90, forming another set of sliding pairs, allowing the swing amplitude detection component 30 to be adjusted along the third direction z under the constraint of the second guide member 90. Through this cross-sliding structure, the swing amplitude detection component 30 obtains the ability to adjust its two-dimensional position within the plane defined by the first direction x and the third direction z. This design enhances the alignment flexibility of the laser emitter with the first side of the brush head 220: on the one hand, it can compensate for lateral offsets caused by different electric toothbrush 200 models along the first direction x; on the other hand, it can adjust the laser incident height along the third direction z to accommodate differences in the vertical installation position of the brush head 220, ensuring that the laser beam is always accurately projected onto the center area of ​​the reflector attached to the first side of the brush head 220. Especially when testing electric toothbrushes 200 with irregularly shaped handles 210, tilted brush necks, or non-standard brush head 220 layouts, this dual-degree-of-freedom adjustment mechanism can avoid the loss of reflected signals or measurement errors caused by optical path deviation, thereby ensuring the accuracy of amplitude data acquisition.

[0053] Based on the above hardware structure, the present invention also proposes a method for evaluating the cleaning power of an electric toothbrush.

[0054] Please see Figures 1 to 4 In one embodiment of the present invention, the method for evaluating the cleaning power of an electric toothbrush includes: S100: When the brush head is swinging, control the pressure application component to move from the first position to the second position so that the contact surface abuts against the second side of the brush head to apply multiple preset simulated brushing pressures to the brush head, and control the swing amplitude detection component to emit a laser towards the first side of the brush head. S200: Acquire the reflected signal generated by the laser reflected from the brush head, and determine the swing amplitude corresponding to multiple preset simulated brushing pressures based on the reflected signal; S300: Obtain the bristle height of the brush head and the preset operating frequency of the electric toothbrush; S400. Based on the bristle height and swing amplitude, calculate the length of the motion trajectory of the bristle tip of the brush head during a single swing. S500: Multiply the length of the motion trajectory by the preset working frequency to obtain the length of the cleaning path of the brush head bristle tip per unit time under the corresponding preset simulated brushing pressure.

[0055] In this embodiment, the above steps are executed by the control device 46 of the electric toothbrush cleaning power evaluation system 100. The control device 46 first drives the drive member 41 in the pressure application assembly 40 to move the pressure head 43 from a first position to a second position until its contact surface contacts the second side of the brush head 220. The pressure detection member 42 monitors the applied force in real time. Once the preset simulated brushing pressure is reached, the drive stops, thus establishing a load condition in the test. This process can be repeated to apply multiple different preset simulated brushing pressures. Subsequently, the control device 46 activates the first and second amplitude detection members 31 and 32 in the amplitude detection assembly 30, respectively emitting a first laser and a second laser towards the first side of the brush head 220. The emission directions of the two laser beams are set at an angle to form a non-collinear observation path. When the electric toothbrush 200 is running, the reflector attached to the first side of the brush head 220 deflects with the swing of the brush head 220, causing the first and second laser beams to be reflected and form changing light spots on their respective detection scales. The control device 46 acquires the reflected signal generated by the laser reflected from the brush head 220, which contains information on the position changes of two sets of light spots. Since the two laser beams have different incident angles, the displacement of their reflected light spots corresponds to the projection changes of the brush head 220 in different spatial directions. Based on the joint analysis of these two sets of reflected signals, the control device 46 calculates the actual oscillation amplitude of the brush head 220, which corresponds one-to-one with multiple preset simulated brushing pressures. Next, the control device 46 calls the pre-input bristle height and preset operating frequency data of the electric toothbrush 200. Based on the bristle height and the calculated oscillation amplitude, it calculates the trajectory length of the brush head 220 bristle tip during a single oscillation using geometric relationships. Finally, it multiplies this trajectory length by the preset operating frequency to obtain the cleaning path length of the brush head 220 bristle tip per unit time under the corresponding preset simulated brushing pressure, thereby quantifying the actual cleaning efficiency under different pressures.

[0056] like Figures 1 to 3 and Figure 5 As shown, in one embodiment, step S100 includes: S110. When the brush head is oscillating, the control drive unit drives the pressure head to move from the first position to the second position, so that the contact surface abuts against the second side of the brush head, so as to apply multiple preset simulated brushing pressures to the brush head. S120. Obtain the pressure value applied to the brush head by the pressure detection device; S130. Based on the difference between the pressure value and the preset simulated brushing pressure, adjust the output power of the drive component so that the pressure value reaches multiple preset simulated brushing pressures respectively. When each preset simulated brushing pressure is reached, control the swing amplitude detection component to emit a laser towards the first side of the brush head to obtain a reflected signal corresponding to each of the multiple preset simulated brushing pressures.

[0057] In this embodiment, the above steps are executed by the control device 46 of the electric toothbrush cleaning power assessment system 100. First, when the brush head 220 is in an oscillating state, the control device 46 drives the drive member 41 in the pressure application assembly 40 to move the pressure head 43 from a first position to a second position, causing the contact surface of the pressure head 43 to gradually approach and abut against the second side of the brush head 220, thereby applying a load to the brush head 220. During this process, the control device 46 obtains the current pressure value applied to the brush head 220 by the pressure detection member 42 in real time and compares this pressure value with the current preset simulated brushing pressure. If there is a difference, the control device 46 adjusts the output power of the drive member 41 according to the difference to fine-tune the pushing force of the pressure head 43 until the pressure value reaches the current preset simulated brushing pressure. The electric toothbrush cleaning power assessment system 100 supports sequential testing of multiple different preset simulated brushing pressures. When the pressure value reaches each preset simulated brushing pressure under feedback adjustment, the control device 46 immediately controls the amplitude detection component 30 to emit a laser towards the first side of the brush head 220. The laser is reflected by the brush head 220 to generate a reflected signal. The control device 46 collects this signal, thereby establishing a one-to-one mapping relationship between multiple preset simulated brushing pressures and the corresponding reflected signals, providing a basis for subsequent calculation of the brush head 220 amplitude under different pressure conditions.

[0058] like Figures 1 to 3 and Figure 6 As shown, in one embodiment, the electric toothbrush cleaning power evaluation method further includes: S600: Acquire the oscillation trajectory of the brush head as captured by the camera through the transparent part; S700: Determine the oscillation speed of the brush head based on the obtained oscillation trajectory of the brush head.

[0059] In this embodiment, the above steps are executed by the control device 46 of the electric toothbrush cleaning power evaluation system 100. The control device 46 first retrieves image data collected by a camera located in the pressure application component 40. During the test, the camera continuously captures images of the oscillating brush head 220 through a transparent element 44 embedded in the fixing slot 401 of the pressure head 43, thereby acquiring a sequence of oscillation trajectory images of the brush head 220 under pressure. Subsequently, the control device 46 performs image processing and analysis on the acquired oscillation trajectory image sequence. By identifying the positional changes of feature points of the brush head 220 in consecutive frames and the corresponding time intervals, it calculates the displacement change rate of the brush head 220 per unit time, thereby determining the oscillation speed of the brush head 220. This process utilizes the optical channel provided by the transparent element 44 to avoid obstruction of the observation line of sight by the pressure head 43, enabling the electric toothbrush cleaning power evaluation system 100 to intuitively and accurately capture the real-time motion state of the brush head 220 while applying simulated brushing pressure, providing additional speed dimension data support for evaluating the response characteristics of the brush head 220 under different pressures.

[0060] like Figures 1 to 3 and Figure 7 As shown, in one embodiment, step S700 includes: S710. Extract the displacement sequence of preset feature points on the brush head within at least one complete oscillation cycle from the oscillation trajectory. S720: Calculate the average linear velocity of preset feature points based on the displacement sequence and the shooting frame rate of the camera, and use the average linear velocity as the oscillation speed of the brush head.

[0061] In this embodiment, the above steps are executed by the control device 46 of the electric toothbrush cleaning power evaluation system 100. The control device 46 first performs feature recognition processing on the acquired oscillation trajectory image sequence, extracting a series of continuous position coordinates of a preset feature point on the brush head 220 within at least one complete oscillation cycle, thereby constructing a displacement sequence reflecting the movement process of the feature point. Subsequently, the control device 46, in conjunction with the fixed shooting frame rate set by the camera during the shooting process, uses the reciprocal of the shooting frame rate as the time interval reference between two adjacent frames. Using this time interval reference, it calculates the distance change between adjacent position points in the displacement sequence, thereby calculating the average linear velocity of the preset feature point within the complete oscillation cycle, and directly determines the calculated average linear velocity as the oscillation speed of the brush head 220. Through this image sequence-based temporal analysis method, the electric toothbrush cleaning power evaluation system 100 can transform visualized trajectory data into specific velocity quantification indicators, thereby more precisely characterizing the motion characteristics of the brush head 220 under pressure.

[0062] like Figures 1 to 3 and Figure 8 As shown, in one embodiment, after step S700, the method further includes: S800: Based on the oscillation speed, preset simulated brushing pressure, and the working current and voltage of the electric toothbrush, calculate the energy loss rate of the electric toothbrush under the current preset simulated brushing pressure. S900: Compare the energy loss rate with the preset energy efficiency threshold; S1000A: If the energy loss rate is not greater than the preset energy efficiency threshold, then the electric toothbrush meets the factory energy efficiency standard. S1000B: If the energy loss rate is greater than the preset energy efficiency threshold, the electric toothbrush is determined not to meet the factory energy efficiency standard.

[0063] In this embodiment, the above steps are executed by the control device 46 of the electric toothbrush cleaning power evaluation system 100. The control device 46 first acquires the oscillation speed determined in the aforementioned steps, the currently applied preset simulated brushing pressure, and the real-time monitored operating current and voltage of the electric toothbrush 200 under the corresponding operating conditions. Based on these parameters, it calculates the energy loss rate of the electric toothbrush 200 under the current preset simulated brushing pressure. This energy loss rate reflects the efficiency relationship between the conversion of electrical energy into effective mechanical oscillation and overcoming load resistance. Subsequently, the control device 46 compares the calculated energy loss rate with a preset energy efficiency threshold stored in a database. If the energy loss rate is not greater than the preset energy efficiency threshold, it indicates that the energy utilization efficiency of the electric toothbrush 200 under simulated real brushing load is within an acceptable range, and the control device 46 determines that the electric toothbrush 200 meets the factory energy efficiency standard. If the energy loss rate is greater than the preset energy efficiency threshold, it indicates that the electric toothbrush 200 has a high level of ineffective energy loss under the same load, and the control device 46 determines that the electric toothbrush 200 does not meet the factory energy efficiency standard. By introducing energy loss rate as a criterion, the electric toothbrush cleaning power evaluation system 100 can comprehensively judge the performance of the electric toothbrush 200 from the perspective of energy efficiency, based on the evaluation of the cleaning path length, to ensure that the products leaving the factory have both good cleaning effect and reasonable energy consumption.

[0064] Although the aforementioned embodiments treat the brush head 220 as a rigid body and apply concentrated force through the contact surface to simulate brushing pressure, in actual application scenarios, the pressure applied by the hand through the brush handle 210 is often unevenly distributed on the back of the brush head 220, and the degree of bristle deformation and the final cleaning effect are closely related to the spatial distribution of this pressure. The method of applying concentrated force through a rigid contact surface may not be able to fully reproduce the complex and uneven pressure distribution during the actual brushing process.

[0065] To improve this problem, such as Figures 1 to 3 and Figure 9 and Figure 10 As shown, in one embodiment, the contact surface is a flexible and deformable surface, and the electric toothbrush cleaning power evaluation method further includes: S1100: After the pressure application component moves to the second position, obtain an image of the deformation area of ​​the flexible deformable surface caused by contact with the brush head; S1200. Based on the deformation area image, determine the actual contact area and contact pressure distribution cloud map between the flexible deformable surface and the second side of the brush head; S1300: Based on the contact pressure distribution cloud map, weighted values ​​are assigned to multiple different areas of the brush head to obtain differentiated area pressure values ​​corresponding to the preset simulated brushing pressure. Step S400 includes: S410. Based on the pressure values ​​of the differentiated areas, calculate the sub-motion trajectory lengths of the bristle endpoints corresponding to different areas of the brush head, and perform a weighted sum based on the actual contact area to obtain the motion trajectory length.

[0066] In this embodiment, the above steps are executed by the control device 46 of the electric toothbrush cleaning power assessment system 100. First, after the pressure application component 40 moves to the second position and the flexible deformable surface abuts against the second side of the brush head 220, the control device 46 acquires an image of the deformation area of ​​the flexible deformable surface caused by pressure. Subsequently, the control device 46 performs image processing analysis on the deformation area image, identifies the actual contact area between the flexible deformable surface and the second side of the brush head 220, and constructs a contact pressure distribution cloud map reflecting the spatial distribution of pressure on the contact surface. Based on this contact pressure distribution cloud map, the control device 46 divides the brush head 220 into multiple different regions and assigns a weighted value to each region, thereby calculating the differential region pressure value corresponding to the preset simulated brushing pressure to characterize the true state of uneven force distribution at different locations. When calculating the motion trajectory length, the control device 46 no longer uses a single global parameter. Instead, based on the aforementioned differential regional pressure values, it calculates the sub-motion trajectory lengths for the bristle endpoints corresponding to different regions of the brush head 220. These sub-motion trajectory lengths are then weighted and summed in conjunction with the actual contact area to obtain a more accurate motion trajectory length. This method, by introducing the concept of force tactile perception, upgrades the simulation of rigid body concentrated force to a regionalized weighted calculation based on contact area and pressure distribution cloud maps. This more realistically reflects the different motion states of the bristles in different regions due to force differences, thereby significantly improving the accuracy of the electric toothbrush cleaning power assessment system 100 in simulating complex brushing conditions.

[0067] Although the aforementioned embodiments calculate the cleaning path length per unit time based on a preset working frequency and the length of a single oscillation trajectory, this implicitly assumes that the brush head 220 oscillates at a constant speed or in a regular manner under constant pressure. However, in actual operation, due to factors such as resonance of the internal mechanical structure of the electric toothbrush 200, nonlinear changes in the friction force of the transmission components, and load response, the instantaneous speed of the brush head 220 often fluctuates significantly within a complete oscillation cycle. The instability of the instantaneous speed directly affects the continuity and uniformity of the cleaning force. Existing technologies usually focus on evaluating macroscopic statistics such as average amplitude or average speed, and easily overlook the key detail of instantaneous speed fluctuation within the oscillation cycle, resulting in an insufficiently comprehensive evaluation of the cleaning force stability of the electric toothbrush 200 under actual high-frequency vibration conditions.

[0068] To improve this problem, such as Figures 1 to 3 and Figure 11 As shown, in one embodiment, the electric toothbrush cleaning power evaluation method further includes: S1400: During the process of the contact surface contacting the second side of the brush head and applying any preset simulated brushing pressure to the brush head, obtain the oscillation speed curve of the brush head; S1500. Based on the oscillation speed curve, determine the peak and valley values ​​of the brush head speed within the oscillation cycle. S1600 When the difference between the peak and valley values ​​of the speed exceeds the preset speed fluctuation threshold, the pressure of the pressure application component on the brush head is adjusted so that the oscillation speed of the brush head is within the preset oscillation speed range within the oscillation cycle, and the length of the motion trajectory is calculated based on the adjusted oscillation speed.

[0069] In this embodiment, the above steps are executed by the control device 46 of the electric toothbrush cleaning power evaluation system 100. First, during the process of applying any preset simulated brushing pressure to the brush head 220 by contacting the contact surface of the pressure application component 40 with the second side of the brush head 220, the control device 46, based on the swing trajectory captured by the aforementioned camera or the reflected signal obtained by the swing amplitude detection component 30, collects and constructs the swing speed curve of the brush head 220 within a complete swing cycle in real time. Subsequently, the control device 46 analyzes the swing speed curve, identifying and determining the peak and trough speed values ​​reached by the brush head 220 within the swing cycle. Next, the control device 46 calculates the difference between the peak and trough speed values ​​and compares this difference with a preset speed fluctuation threshold. If the difference exceeds the preset speed fluctuation threshold, it indicates that the instantaneous speed fluctuation of the brush head 220 is too large under the current operating conditions. The control device 46 then automatically adjusts the pressure of the pressure application component 40 on the brush head 220, suppressing speed instability caused by mechanical resonance or frictional changes by changing the load characteristics, until the oscillation speed of the brush head 220 converges to the preset oscillation speed range within the oscillation cycle. Finally, the control device 46 recalculates the motion trajectory length based on the stable oscillation speed data obtained after adjusting the pressure. This method, by introducing a monitoring and feedback adjustment mechanism for instantaneous speed fluctuations within the oscillation cycle, enables the electric toothbrush cleaning power evaluation system 100 to optimize the test conditions, ensuring that the speed data used to calculate the cleaning path length has higher stability and representativeness, thereby more accurately evaluating the cleaning power performance of the electric toothbrush 200 under actual high-frequency vibration.

[0070] Although the aforementioned embodiments obtained the cleaning path length by calculating the product of the motion trajectory length of the bristle tip and the working frequency, this is essentially a kinematic index measured under free space or ideal simulation conditions. It mainly reflects the mechanical motion capability of the brush head 220, but fails to fully consider the interaction mechanism between the bristles and the complex curved surface of the teeth during the actual contact process. For example, under certain working conditions, even if the calculated cleaning path length is large, if the oscillation angle of the brush head 220 does not match the curvature of the tooth surface, or if the bristles are excessively bent, resulting in the failure of effective contact, the bristle tips may not actually effectively touch and clean the tooth surface. This leads to a deviation between the kinematic index and the actual cleaning effect, making it difficult to fully characterize the final cleaning efficiency of the electric toothbrush 200 in the real oral environment.

[0071] like Figures 1 to 3 and Figure 12 As shown, in one embodiment, the electric toothbrush cleaning power evaluation method further includes: S1700: Obtain the bending deformation parameters of the brush head bristles under different preset simulated brushing pressures; S1800: Obtain the three-dimensional contour data of the preset bionic tooth model; S1900. Based on the bending deformation parameters, swing amplitude, and three-dimensional contour data of the bionic tooth model, the instantaneous contact trajectory and contact force of the brush tip sliding across the surface of the bionic tooth model are calculated. S2000: Calculate the work done by the brush tip on a unit area of ​​the bionic tooth model surface based on the instantaneous contact trajectory and contact force.

[0072] In this embodiment, the above steps are executed by the control device 46 of the electric toothbrush cleaning power evaluation system 100. The control device 46 first acquires the bending deformation parameters of the brush head 220 bristles under different preset simulated brushing pressures. These parameters reflect the actual morphological changes of the bristles under load. Simultaneously, it calls upon pre-stored three-dimensional contour data of a preset bionic tooth model to simulate the complex geometric features of a real tooth surface. Subsequently, the control device 46 fuses the aforementioned bending deformation parameters, measured swing amplitude data, and the three-dimensional contour data of the bionic tooth model. Through geometric modeling and mechanical analysis, it calculates the instantaneous contact trajectory of the bristle tip sliding across the surface of the bionic tooth model and the corresponding contact force distribution, thereby reproducing the contact state when the bristles interact with the curved surface of the tooth. Next, based on the calculated instantaneous contact trajectory and contact force, the control device 46 further integrates and calculates the work done by the bristle tip on a unit area of ​​the bionic tooth model surface, and uses this work as the final evaluation index characterizing the cleaning power of the electric toothbrush 200. By introducing biomimetic tooth models and bristle deformation parameters, the evaluation dimension is extended from the mechanical motion path to the actual work effect of the bristles on the tooth surface. This can more accurately reflect the effective contact and cleaning ability of the bristles on complex curved surfaces, thereby improving the characterization accuracy of the electric toothbrush cleaning power evaluation system 100 on the actual oral cleaning efficiency.

[0073] The present invention also proposes a control device 46, such as Figure 13 As shown, the control device 46 includes a processor 461 and a memory 462. The memory 462 stores an electric toothbrush cleaning power evaluation control program. When the processor 461 executes the electric toothbrush cleaning power evaluation control program, it implements the electric toothbrush cleaning power evaluation method as described above. The specific structure of the electric toothbrush cleaning power evaluation method is as described in the above embodiments. Since this control device 46 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0074] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A method for evaluating the cleaning power of an electric toothbrush, characterized in that, An electric toothbrush cleaning power evaluation system is used, the electric toothbrush including a handle and a brush head having opposing first and second sides; the electric toothbrush cleaning power evaluation system includes a pressure application component and an amplitude detection component, the pressure application component having an abutment surface, a first position where the abutment surface is separated from the second side of the brush head, and a second position where the abutment surface abuts against the second side of the brush head, and configured to be movable and switchable between the first position and the second position; The method for evaluating the cleaning power of an electric toothbrush includes: When the brush head swings, the pressure application component is controlled to move from the first position to the second position, so that the contact surface abuts against the second side of the brush head, so as to apply multiple preset simulated brushing pressures to the brush head, and the swing amplitude detection component is controlled to emit a laser towards the first side of the brush head; The reflected signal generated by the laser reflected by the brush head is obtained, and the swing amplitude corresponding to a plurality of preset simulated brushing pressures is determined according to the reflected signal; The height of the brush head bristles and the preset operating frequency of the electric toothbrush are obtained. Based on the bristle height and the swing amplitude, the length of the motion trajectory of the bristle tip of the brush head during a single swing is calculated. Multiplying the length of the motion trajectory by the preset working frequency yields the cleaning path length of the brush head bristle tip per unit time under the corresponding preset simulated brushing pressure.

2. The method for evaluating the cleaning power of an electric toothbrush as described in claim 1, characterized in that, The pressure application assembly includes a pressure head, a driving component, and a pressure detection component, wherein the pressure detection component is connected between the driving component and the pressure head; The step of controlling the pressure application component to move from the first position to the second position when the brush head is oscillating, so that the contact surface abuts against the second side of the brush head, to apply multiple preset simulated brushing pressures to the brush head, and controlling the oscillation detection component to emit a laser towards the first side of the brush head includes: When the brush head is oscillating, the driving member is controlled to drive the pressure head to move from the first position to the second position, so that the contact surface abuts against the second side of the brush head, thereby applying multiple preset simulated brushing pressures to the brush head; The pressure value applied by the pressure head to the brush head is obtained through the pressure detection device; Based on the difference between the pressure value and the preset simulated brushing pressure, the output power of the drive component is adjusted so that the pressure value reaches a plurality of the preset simulated brushing pressures. When each preset simulated brushing pressure is reached, the swing amplitude detection component is controlled to emit a laser towards the first side of the brush head to obtain a reflected signal corresponding to a plurality of preset simulated brushing pressures.

3. The method for evaluating the cleaning power of an electric toothbrush as described in claim 2, characterized in that, The pressure application assembly also includes a transparent component and a camera component. The pressure application head is provided with a fixing groove corresponding to the position of the contact surface. The transparent component is disposed in the fixing groove, and the camera component is positioned facing the transparent component. The method for evaluating the cleaning power of electric toothbrushes also includes: The camera captures the oscillation trajectory of the brush head through the transparent part; The oscillation speed of the brush head is determined based on the obtained oscillation trajectory of the brush head.

4. The method for evaluating the cleaning power of an electric toothbrush as described in claim 3, characterized in that, Determining the oscillation speed of the brush head based on the obtained oscillation trajectory of the brush head includes: Extract the displacement sequence of the preset feature points on the brush head within at least one complete oscillation cycle from the oscillation trajectory; Based on the displacement sequence and the shooting frame rate of the camera, the average linear velocity of the preset feature points is calculated, and the average linear velocity is used as the oscillation speed of the brush head.

5. The method for evaluating the cleaning power of an electric toothbrush as described in claim 3, characterized in that, After determining the oscillation speed of the brush head based on the obtained oscillation trajectory of the brush head, the method further includes: Based on the oscillation speed, the preset simulated brushing pressure, and the operating current and voltage of the electric toothbrush, calculate the energy loss rate of the electric toothbrush under the current preset simulated brushing pressure. The energy loss rate is compared with a preset energy efficiency threshold. If the energy loss rate is not greater than the preset energy efficiency threshold, then the electric toothbrush is determined to meet the factory energy efficiency standard. If the energy loss rate is greater than the preset energy efficiency threshold, then the electric toothbrush is determined to not meet the factory energy efficiency standard.

6. The method for evaluating the cleaning power of an electric toothbrush as described in any one of claims 1 to 5, characterized in that, The contact surface is a flexible and deformable surface, and the electric toothbrush cleaning power evaluation method further includes: After the pressure-applying component moves to the second position, an image of the deformation area of ​​the flexible deformable surface due to contact with the brush head is obtained; Based on the deformation region image, determine the actual contact area and contact pressure distribution cloud map between the flexible deformable surface and the second side of the brush head; Based on the contact pressure distribution cloud map, weighted values ​​are assigned to multiple different regions of the brush head to obtain differentiated region pressure values ​​corresponding to the preset simulated brushing pressure. The calculation of the trajectory length of the brush head's bristle tip during a single oscillation, based on the bristle height and the oscillation amplitude, includes: Based on the pressure values ​​of the differentiated regions, the sub-motion trajectory lengths of the bristle endpoints corresponding to different regions of the brush head are calculated respectively, and a weighted sum is performed based on the actual contact area to obtain the motion trajectory length.

7. The method for evaluating the cleaning power of an electric toothbrush as described in claim 6, characterized in that, The method for evaluating the cleaning power of electric toothbrushes also includes: During the process of the contact surface abutting against the second side of the brush head and applying any of the preset simulated brushing pressures to the brush head, the oscillation speed curve of the brush head is obtained; Based on the oscillation speed curve, determine the peak and trough values ​​of the brush head's speed within the oscillation cycle; When the difference between the peak speed and the valley speed exceeds a preset speed fluctuation threshold, the pressure of the pressure application component on the brush head is adjusted so that the oscillation speed of the brush head is within a preset oscillation speed range within the oscillation cycle, and the length of the motion trajectory is calculated based on the adjusted oscillation speed.

8. The method for evaluating the cleaning power of an electric toothbrush as described in any one of claims 1 to 5, characterized in that, The method for evaluating the cleaning power of electric toothbrushes also includes: Obtain the bending deformation parameters of the brush head bristles under different preset simulated brushing pressures; Obtain the three-dimensional contour data of the preset bionic tooth model; Based on the bending deformation parameters, the swing amplitude, and the three-dimensional contour data of the bionic tooth model, the instantaneous contact trajectory and contact force of the brush tip sliding across the surface of the bionic tooth model are calculated. Based on the instantaneous contact trajectory and contact force, calculate the work done by the brush tip on a unit area of ​​the surface of the bionic tooth model.

9. A control device, characterized in that, The device includes a processor and a memory, wherein the memory stores an electric toothbrush cleaning power evaluation control program, and when the processor executes the electric toothbrush cleaning power evaluation control program, it implements the electric toothbrush cleaning power evaluation method as described in any one of claims 1 to 8.

10. An electric toothbrush cleaning power assessment system, characterized in that, The electric toothbrush includes a handle and a brush head having opposing first and second sides; the electric toothbrush cleaning power evaluation system includes: The pressure application component has an abutment surface, a first position in which the abutment surface is separated from a second side of the brush head, and a second position in which the abutment surface abuts against the second side of the brush head, and is configured to be movable and switchable between the first position and the second position; An amplitude detection component is used to emit a laser towards a first side of the brush head; The control device as described in claim 9 is electrically connected to the pressure application component and the swing amplitude detection component, respectively.

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