Oral cavity cleaner and driving device for oral cavity cleaning

Abstract

The utility model discloses an oral cavity cleaner and a driving device used for oral cavity cleaning.The oral cavity cleaner comprises a brush handle assembly and a nursing head, the brush handle assembly comprises a holding shell and the driving device, and the driving device at least comprises a static component and a rotating component; the static part comprises a shell element and a stator support contained in the shell element, a plurality of containing tooth grooves are formed in the inner wall face of the stator support, and the extending direction of the containing tooth grooves is parallel to the first axis. The rotating component comprises a power output shaft and at least two rotor assemblies located in the stator support, the at least two rotor assemblies are arranged on the power output shaft in a sleeving mode and are sequentially arranged in a stacked mode along the first axis, and a preset dislocation angle exists between every two adjacent rotor assemblies from the view of the section perpendicular to the first axis. According to the technical scheme, under the condition that the size of the brush handle assembly is not increased, the power and the anti-load capacity of the driving device can be increased, and the oral cavity cleaning effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of oral cleaning appliances, in particular to an oral cleaning appliance and a driving device for oral cleaning. BACKGROUND

[0002] An electric toothbrush generally comprises a brush handle assembly and a brush head connected with the brush handle assembly, a user holds the brush handle assembly to drive the brush head to move, and cooperates with a servo motor in the brush handle assembly to drive the brush head to move, so as to achieve deep cleaning of the oral cavity.

[0003] However, due to the volume of the brush handle assembly, more batteries cannot be accommodated in the brush handle assembly, so that the servo motor can only be driven at low voltage, but the servo motor driven at low voltage has weak power and poor load resistance, which leads to poor cleaning effect. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present application is to provide an oral cleaning appliance and a driving device for oral cleaning, which can increase the power and load resistance of the driving device without increasing the volume of the brush handle assembly, so as to improve the oral cleaning effect.

[0005] To achieve the above-mentioned purpose, the present application provides an oral cleaning appliance in one aspect, which comprises a brush handle assembly and a treatment head, the brush handle assembly comprises a holding housing with an accommodation space, and a driving device and an energy storage component arranged in the accommodation space, the treatment head has a cleaning part at its distal end; the brush handle assembly is removably coupled with the treatment head; wherein the driving device is configured to generate a periodic motion; the driving device extending along a first axis at least comprises a stationary component and a rotating component, wherein the stationary component comprises a housing element and a stator support accommodated in the housing element, the inner wall surface of the stator support is provided with a plurality of accommodation tooth grooves arranged around the first axis, and the extension direction of the accommodation tooth grooves is parallel to the first axis; the rotating component comprises a power output shaft and at least two rotor assemblies located in the stator support, the power output shaft is at least partially contained in the brush handle assembly and is configured to engage the treatment head; the power output shaft is configured to transmit the generated periodic motion to the treatment head, so that the cleaning part rotates periodically at least in a first direction around the first axis; the power output shaft extends along the first axis and is rotationally connected with the housing element, the at least two rotor assemblies are sleeved on the power output shaft and are sequentially stacked along the first axis, and from the cross section perpendicular to the first axis, there is a preset misalignment angle between adjacent two rotor assemblies.

[0006] The application forms a similar inclined pole structure by segmenting the rotor element and misaligning the straight poles, increases the cogging torque period, reduces the cogging torque amplitude, thereby weakening the cogging torque, reducing the force of the driving device to overcome the cogging torque, increasing the actual output power of the driving device, and further improving the output power and load resistance of the driving device without increasing the number of energy storage components to change the volume of the brush handle assembly, thereby improving the oral cleaning effect. At the same time, the straight slot structure accommodating the cogging facilitates coil winding, and the rotor element is segmented and misaligned, facilitating processing and assembly operations and reducing manufacturing costs.

[0007] In addition, the rotor element is segmented and misaligned to form a similar inclined pole structure, which can also reduce the vibration of the driving device and avoid the influence of the vibration of the driving device on the control accuracy of the motion detection component, thereby making the control system of the driving device more stable, accurate and efficient, and further ensuring the stability of the operation of the care head and improving the user experience.

[0008] To achieve the above-mentioned purpose, another aspect of the present application also provides a driving device for oral cleaning, which at least comprises: a static component extending along a first axis, comprising a housing element and a stator support accommodated in the housing element, the inner wall surface of the stator support is provided with a plurality of accommodating tooth grooves arranged around the first axis, and the extension direction of the accommodating tooth grooves is parallel to the first axis; a rotating component comprising a power output shaft and at least two rotor assemblies located in the stator support, the power output shaft extends along the first axis and is rotationally connected with the housing element, and the at least two rotor assemblies are sleeved on the power output shaft and are sequentially stacked along the first axis, and from the cross section perpendicular to the first axis, there is a preset misalignment angle between adjacent two rotor assemblies.

[0009] To achieve the above-mentioned purpose, another aspect of the present application also provides a brush handle assembly, which comprises a holding shell with an accommodating space, and the accommodating space is provided with an energy storage component and the above-mentioned driving device for oral cleaning. BRIEF DESCRIPTION OF DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0011] Figure 1 is a structural schematic diagram of an oral cleaning device provided by the present application;

[0012] Figure 2is a half cross-sectional view of a driving device in one embodiment provided by the present application;

[0013] Figure 3 is a partial structure cross-sectional view of a stationary component in one embodiment provided by the present application;

[0014] Figure 4 is a half cross-sectional view of a rotating component in one embodiment provided by the present application;

[0015] Figure 5 is a structure view of a rotating component in one embodiment provided by the present application;

[0016] Figure 6 is a cross-sectional view of a rotating component in one embodiment provided by the present application;

[0017] Figure 7 is a misalignment structure view of a rotor assembly in one embodiment provided by the present application;

[0018] Figure 8 is a misalignment structure view of a rotor assembly in another embodiment provided by the present application;

[0019] Figure 9 is a misalignment structure view of a rotor assembly in yet another embodiment provided by the present application;

[0020] Figure 10 is a partial structure enlarged view of Figure 2 ;

[0021] Figure 11 is a partial structure enlarged view of a driving device in one embodiment provided by the present application;

[0022] Figure 12 is a half cross-sectional view of a driving device in another embodiment provided by the present application.

[0023] BRIEF DESCRIPTION OF DRAWINGS

[0024] 1000, brush handle assembly; 2000, care head; 2100, fluid passage; 2200, fluid outlet; a, first axis; θk, preset misalignment angle

[0025] 100, holding housing; 110, containing space;

[0026] 200, drive device; 210, housing element; 211, housing body; 212, tail cover; 220, stator support; 221, accommodating gear slot; 230, power output shaft; 231, axial channel; 232, output shaft body; 233, transmission shaft; 240, rotor assembly; 241, rotor support; 2411, base; 24111, mounting hole; 2412, positioning rib; 242, first magnetic element; 243, second magnetic element; 244, magnet slot; 250, motion detection assembly; 260, motion feedback assembly; 261, mounting seat; 2611, sleeve; 2612, support back plate; 262, position feedback element; 270, surface covering element; 271, engaging portion; 280, tensioning element;

[0027] 300, energy storage component;

[0028] 400, liquid storage chamber;

[0029] 500, fluid pumping unit. DETAILED DESCRIPTION

[0030] With the improvement of people's living standards, more and more families begin to use various oral cavity cleaning devices to clean their oral cavities, such as electric toothbrushes, oral irrigators, and brushing and flushing integrated machines, to improve the oral environment. For example, an electric toothbrush generally includes a brush handle assembly and a brush head connected to the brush handle assembly. The user holds the brush handle assembly to move the brush head, and cooperates with the servo motor in the brush handle assembly to drive the brush head to move, so as to realize deep cleaning of the oral cavity by using the high-frequency forward and reverse rotation and high control precision of the servo motor.

[0031] In the related art, the servo motor in the brush handle assembly can be driven by low voltage (usually a single battery, 3.7-4.2v) or high voltage (two or more batteries, 7.4v). If a low-voltage servo motor is used, the power supply requirement is low, and a single battery can be used for driving, but the power is weak, the load resistance is weak, and the cleaning effect is poor. Therefore, in order to enhance the power, the present application attempts to use a high-voltage servo motor, that is, to use a two-battery drive. Although it increases the power of the servo motor, it also leads to an increase in the volume of the brush handle assembly for accommodating the two batteries, affecting the user's holding feeling and portability, and reducing the user's experience.

[0032] Therefore, the present application changes the research direction and explores how to increase the driving power and load resistance of the driving device while maintaining the volume of the brush handle assembly to improve the oral cleaning effect. Specifically, in the deep research on the power influencing factors of the low-voltage driving servo motor, it is found that the servo motor used in the current market electric toothbrush adopts the design of evenly segmented circumferential rotor magnetic poles and axial non-segmented stator straight slots. In the motor operation, due to the existence of the core tooth slot, the interaction between the permanent magnet on the rotor and the stator core will exist, so that the tooth slot torque will be generated when the motor rotates. During the reciprocating motion of the servo motor, a part of the power needs to be allocated to overcome the tooth slot torque, which leads to the weak power and poor load resistance of the servo motor, thereby affecting the oral cleaning effect.

[0033] Based on this, the present application designs the rotor and stator structure of the servo motor. Specifically, by segmenting the straight pole of the rotor and designing the straight pole to be staggered, a structure similar to the rotor skew pole structure is realized, and the stator straight slot design is matched to weaken the specific harmonic, thereby weakening the motor tooth slot torque. In this way, the output power and load resistance of the servo motor can be improved without the need to additionally increase the battery and change the volume of the brush handle assembly, and the cleaning effect can be improved.

[0034] In addition, the present application also finds that the generation of tooth slot torque will also cause the servo motor to vibrate. Moreover, the existing Hall sensor is arranged outside the servo motor body, which is not stable and accurate enough in installation, and is accompanied by the vibration of the servo motor, which further affects the accuracy of the detection of the movement position of the rotor and reduces the control effect of the cleaning movement of the electric toothbrush, thereby affecting the user experience.

[0035] Based on this, the present application redesigns the installation position and installation method of the Hall sensor circuit board and the magnetic ring on the basis of weakening the tooth slot torque. Specifically, the design directly connects the Hall sensor circuit board with the stationary part of the servo motor, which simplifies the assembly process and only needs one operation to complete the installation, significantly reducing the assembly complexity and improving the assembly accuracy. This change ensures the accurate placement of the Hall sensor circuit board, which helps to improve the movement control effect. In addition, the Hall sensor circuit board and the magnetic ring are built into the motor assembly, avoiding the expansion of the external structure, so that the overall size of the motor can be reduced to realize a more compact and small design. This compact structure not only makes the electric toothbrush thinner and smaller to optimize the aesthetics of the electric toothbrush, but also leaves more space for the electric toothbrush to store more flushing liquid, thereby enhancing the overall functionality of the product.

[0036] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application.

[0037] As shown in Figure 1 The present application provides an oral cleaning device, which can include a brush handle assembly 1000 and a care head 2000 having a cleaning portion at a distal end thereof, the brush handle assembly 1000 being removably coupled to the care head 2000. The brush handle assembly 1000 includes a holding housing 100, a driving device 200 and an energy storage component 300 for providing electric energy to the driving device 200 to drive the driving device 200 to operate, and a user can move the oral cleaning device for cleaning by holding the holding housing 100. The holding housing 100 has a receiving space 110 in which the driving device 200 and the energy storage component 300 are arranged, and the driving device 200 is configured to drive the care head 2000.

[0038] It should be noted that the oral cleaning device can be a cleaning device with only brushing function, which can only brush and clean the oral cavity of a user, such as an electric toothbrush. The oral cleaning device can also be a cleaning device integrating brushing and rinsing functions, which can brush and clean, rinse and clean or simultaneously brush and rinse and clean the oral cavity of a user, such as a brushing and rinsing all-in-one machine, which is not limited in the present application.

[0039] As shown in Figures 2 to 6 In an implementation, the driving device 200 is configured to convert electric energy into mechanical energy to generate periodic motion, such as high-frequency vibration and / or reciprocating swing. The driving device 200 can be configured in a column shape, and a first axis a is a center line of the driving device 200, that is, the center points of each cross section of the driving device 200 can be located on the first axis a, and the driving device 200 extends along the first axis a. The driving device 200 can include a stationary component and a rotating component, and the stationary component remains relatively stationary when the driving device 200 moves, and the rotating component rotates relative to the stationary component to drive the care head 2000 to move.

[0040] In the embodiment, the stationary component can include a housing element 210 and a stator support 220, the stator support 220 is accommodated in the housing element 210, and the inner wall of the stator support 220 is provided with a plurality of accommodation tooth slots 221 arranged around the first axis a, and the accommodation tooth slots 221 are used to accommodate the coils. In actual application, the housing element 210 can include a housing body 211 and a tail cover 212. The tail cover 212 is arranged at one end of the housing body 211 along the first axis a. The housing body 211 is configured as a cylindrical structure, and the axis of the housing body 211 can be collinear with the first axis a. One end of the housing body 211 is formed with an opening to facilitate the stator support 220 and the rotating component to be mounted into the housing body 211 through the opening. The tail cover 212 is connected with the housing body 211 and at least partially covers the opening to block foreign matters from entering the inside of the housing body 211 to affect the normal operation of the driving device 200.

[0041] The rotating component can include a power output shaft 230 and a rotor element. The power output shaft 230 is at least partially contained in the brush handle assembly 1000 and is configured to engage the care head 2000. The power output shaft 230 is configured to transmit the generated periodic motion to the care head 2000 so that the cleaning part periodically rotates at least in a first direction around the first axis a. That is, the power output shaft 230 reciprocally rotates around the first axis a as the center line of rotation. Of course, the power output shaft 230 can have more other forms of motion, such as reciprocating movement along the first axis a, knocking motion in a direction perpendicular to the first axis a, or a combination of several forms of motion. The power output shaft 230 extends along the first axis a, and the power output shaft 230 is rotationally connected with the housing element 210 and at least one end thereof extends to the outside of the housing element 210 for connecting the care head 2000. The rotor element is fixedly connected with the power output shaft 230 and located in the area surrounded by the stator support 220. The rotor element is used to interact with the rotating magnetic field generated by the coils on the stator support 220, so that the rotor element rotates synchronously with the rotating magnetic field, thereby driving the power output shaft 230 to rotate and output rotary power.

[0042] In the embodiment, the skew pole structure can be formed by making the accommodation tooth slots 221 or the rotor element skew, increasing the period of the cogging torque, reducing the amplitude of the cogging torque, weakening the cogging torque, reducing the force required for the driving device 200 to overcome the cogging torque, increasing the actual output power of the driving device 200, and thereby improving the output power and load resistance of the driving device 200 without increasing the number of energy storage components 300 to change the volume of the brush handle assembly 1000, and improving the oral cleaning effect.

[0043] In view of the fact that the stator support 220 needs to be wound with coils, it is inconvenient to realize the skew structure by means of segmented design, and the overall skew accommodation tooth slots 221 are difficult to process and have high processing cost.

[0044] Therefore, the application preferably realizes the similar skew pole structure by segmenting and misaligning the rotor element, so as to improve the output power and load resistance of the driving device 200. Specifically, the extension direction of the accommodating tooth groove 221 is parallel to the first axis a, that is, the accommodating tooth groove 221 adopts a straight groove design. Correspondingly, the rotor element is at least two rotor assemblies 240, which are sleeved on the power output shaft 230 and arranged in sequence along the first axis a, and from the cross section perpendicular to the first axis a, there is a preset misalignment angle θk between the adjacent two rotor assemblies 240. In other words, the application divides the rotor element into multiple rotor assemblies 240 along the first axis a, and misaligns the adjacent two rotor assemblies 240. In this way, the similar skew pole structure can be formed by segmenting and misaligning the rotor element, so as to improve the output power and load resistance of the driving device 200. At the same time, the accommodating tooth groove 221 is a straight groove structure, which is convenient for winding the coil, and the rotor element is divided into multiple misaligned segments, which is convenient for processing and assembly operation, and reduces the manufacturing cost.

[0045] In actual application, each rotor assembly 240 includes a rotor support 241, a first magnetic element 242 and a second magnetic element 243, the magnetic properties of the first magnetic element 242 and the second magnetic element 243 are opposite, and the first magnetic element 242 and the second magnetic element 243 are arranged along the circumference of the rotor support 241. After misaligning the adjacent two rotor assemblies 240, the projection part of the first magnetic element 242 of the adjacent two rotor assemblies 240 along the direction parallel to the first axis a overlaps, that is, does not completely coincide, and the projection part of the second magnetic element 243 of the adjacent two rotor assemblies 240 along the direction parallel to the first axis a overlaps. During assembly, the first magnetic element 242 and the second magnetic element 243 can be respectively installed on the rotor support 241 of each rotor assembly 240, and then the rotor assemblies 240 are fixed on the power output shaft 230 with a preset misalignment angle θk.

[0046] The above-mentioned first magnetic element 242 and the second magnetic element 243 can be installed on the rotor support 241 in a built-in manner. Specifically, the rotor support 241 can be provided with an accommodating hole position parallel to the first axis a, and the first magnetic element 242 and the second magnetic element 243 are respectively installed in the corresponding accommodating hole position.

[0047] The above-mentioned first magnetic element 242 and the second magnetic element 243 can also be installed on the rotor support 241 in a surface mounting manner. Specifically, as shown in FIG. 6, the rotor support 241 can be provided with a first magnetic element 242 and a second magnetic element 243 arranged on the surface of the rotor support 241. Figure 5 and Figure 6As shown, the rotor support 241 comprises a base 2411 and at least two positioning ribs 2412, the base 2411 has a mounting hole 24111, the base 2411 is sleeved on the power output shaft 230 through the mounting hole 24111, the at least two positioning ribs 2412 are arranged in an annular array on the outer circumferential surface of the base 2411, and the outer circumferential surface of the base 2411 and the adjacent two positioning ribs 2412 form a magnet slot 244, and the first magnetic member 242 or the second magnetic member 243 is accommodated in each magnet slot 244. In this way, the rotor support 241 does not need to extend to the outer wall surface of the first magnetic member 242 and the second magnetic member 243, so that the volume of the rotor element is smaller, thereby further reducing the volume of the driving device 200, so as to facilitate the user to hold the brush handle assembly 1000. Through this design, the maximum diameter of the rotor assembly 240 can be 7mm±2mm, and the maximum diameter of the driving device 200 can be 17.1mm±10mm. Moreover, in this mounting mode, the gap between the first magnetic member 242 and the second magnetic member 243 and the stator support 220 is smaller, thereby increasing the output torque of the driving device 200 and being more stable.

[0048] In actual application, the first magnetic member 242 and the second magnetic member 243 can be connected with the bottom surface and / or the side surface of the magnet slot 244 by means of gluing.

[0049] As shown in Figure 5 and Figure 6 In an implementable embodiment, the cross section of the first magnetic member 242 and the cross section of the second magnetic member 243 are both configured as a fan ring, that is, the inner and outer wall surfaces thereof are curved and coaxially arranged. In this way, the gap between the first magnetic member 242 and the second magnetic member 243 and the stator support 220 is smaller, thereby increasing the output torque of the driving device 200 and being more stable. It should be pointed out that the cross section defined in the present application refers to the surface formed by the vertical plane of the first axis a.

[0050] In actual application, the first magnetic member 242 and the second magnetic member 243 are of the same shape, and correspondingly, each magnet slot 244 is also of the same shape. The inner wall surface of the magnet slot 244 is adapted to the side surface of the inner and outer wall surfaces of the first magnetic member 242 and the second magnetic member 243, so that the inner wall surface and the side surface of the first magnetic member 242 and the second magnetic member 243 can be attached to the bottom surface and the side surface of the magnet slot 244, thereby ensuring the installation stability of the first magnetic member 242 and the second magnetic member 243.

[0051] In view of the fact that the driving device 200 is installed in the brush handle assembly 1000, the size of the power output shaft 230 and the rotor assembly 240 is limited by the volume requirement of the brush handle assembly 1000, and if the power output shaft 230 and the rotor assembly 240 are connected by means of slotting, the support strength thereof will be affected. Therefore, in an implementable embodiment, the base 2411 can be connected with the power output shaft 230 in an interference fit through the mounting hole 24111, and / or the base 2411 can be connected with the power output shaft 230 in a glue fit through the mounting hole 24111, so as to improve the support strength.

[0052] In another alternative embodiment, the power output shaft 230 can include an output shaft body 232 and a transmission shaft 233, the rotor assembly 240 is fixed on the output shaft body 232, the output shaft body 232 and the transmission shaft 233 are at least partially engaged, the output shaft body 232 is at least partially located in the housing element 210, and the transmission shaft 233 at least partially extends out of the housing element 210. In this way, the output shaft body 232 can be connected with the care head 2000 through the transmission shaft 233, and a slot for clamping the care head 2000 is provided on the transmission shaft 233, so as to avoid slotting on the output shaft body 232, thereby further improving the support strength of the output shaft body 232 connected with the rotor assembly 240. The output shaft body 232 does not need to directly support the care head 2000, and therefore the output shaft body 232 can have a smaller diameter, so as to reduce the volume of the driving device 200 as a whole.

[0053] In an implementable embodiment, the two adjacent rotor assemblies 240 are in close contact with each other, that is, the two adjacent rotor assemblies 240 are pressed tightly without any gap. In this way, the length of the first magnetic member 242 and the second magnetic member 243 can be reduced, so as to ensure the output torque and stability of the driving device 200.

[0054] As shown in FIGS. Figure 5 and Figure 7 In an implementable embodiment, the rotor element can adopt a linear pole-skew design. Specifically, as viewed in a direction perpendicular to the first axis a, the at least two rotor assemblies 240 are sequentially arranged in a linear pole-skew manner along the first axis a according to a preset pole-skew angle θk.

[0055] In order to obtain the best performance of the driving device 200, the rotor element is equally divided into segments, that is, when the length of the rotor element is L and the number of segments is N, the length of each rotor assembly 240 is L / N. Generally, the length L of the rotor element is 10 mm-40 mm, and for example, when L=30 mm and N=3, the length of each rotor assembly 240 is 30 mm / 3=10 mm.

[0056] Meanwhile, the preset skew angle θk is obtained by corresponding slot pole number calculation, that is, when the number of accommodating tooth slots 221 is b, the sum of the first magnetic member 242 and the second magnetic member 243 is c, the least common multiple LCM(b, c) of b and c is obtained, the preset skew angle θk = (360° / LCM(b, c)) / N, and the total skew pole angle is α = θk*(N-1).

[0057] For the convenience of understanding, the following will take the oral cleaner commonly used 6-slot 4-pole driving device 200 and 3-slot 2-pole driving device 200 with three rotor assemblies 240, N = 3, as an example for exemplary description.

[0058] When the 6-slot 4-pole driving device 200 is adopted, that is, the accommodating tooth slots 221 have six, b = 6, the first magnetic member 242 and the second magnetic member 243 of each rotor assembly 240 have two and are staggered, c = 4, the preset skew angle θk of the adjacent two rotor assemblies 240 is (360° / LCM(b, c)) / N = (360° / 12) / 3 = 10°, and the total skew pole angle α = 10°*(3-1) = 20°.

[0059] When the 3-slot 2-pole driving device 200 is adopted, that is, the accommodating tooth slots 221 have three, b = 3, the first magnetic member 242 and the second magnetic member 243 of each rotor assembly 240 have one, c = 2, the preset skew angle θk of the adjacent two rotor assemblies 240 is (360° / LCM(b, c)) / N = (360° / 6) / 3 = 20°, and the total skew pole angle α = 20°*(3-1) = 40°.

[0060] As shown in FIG. 1, in another optional embodiment, when the rotor assemblies 240 have at least four, the at least four rotor assemblies 240 are sequentially staggered in crosswise, as viewed along the direction perpendicular to the first axis a, and the effect of weakening the cogging torque can also be achieved. For example, the second rotor assembly 240 is rotated counterclockwise relative to the first rotor assembly 240 by the preset skew angle θk, the third rotor assembly 240 is rotated clockwise relative to the second rotor assembly 240 by the preset skew angle θk, the fourth rotor assembly 240 is rotated counterclockwise relative to the third rotor assembly 240 by the preset skew angle θk, and so on. Figure 8 As shown in FIG. 1, in another optional embodiment, when the rotor assemblies 240 have at least three, the at least three rotor assemblies 240 are staggered in V-shape, as viewed along the direction perpendicular to the first axis a, and the effect of weakening the cogging torque can also be achieved. For example, when the rotor assemblies 240 have five, the remaining rotor assemblies 240 on both sides of the third rotor assembly 240 are sequentially rotated clockwise or counterclockwise by the preset skew angle θk.

[0061] Figure 9 As shown in FIG. 1, in another optional embodiment, when the rotor assemblies 240 have at least three, the at least three rotor assemblies 240 are staggered in V-shape, as viewed along the direction perpendicular to the first axis a, and the effect of weakening the cogging torque can also be achieved. For example, when the rotor assemblies 240 have five, the remaining rotor assemblies 240 on both sides of the third rotor assembly 240 are sequentially rotated clockwise or counterclockwise by the preset skew angle θk.​

[0062] As shown in Figure 10 and Figure 11 In an implementable embodiment, the driving device 200 can further include a motion detection component, which is at least partially located in the area surrounded by the stationary component. The motion detection component can be used to detect the rotation speed of the rotating component relative to the stationary component, and / or detect the rotation position of the rotating component to perform commutation operation, and then control the rotating component to reverse at the preset position. The motion detection component includes a motion detection assembly 250 and a motion feedback assembly 260. The motion feedback assembly 260 is accommodated in the housing element 210, and the motion feedback assembly 260 is connected with the rotating component and rotates with the rotating component. The motion detection assembly 250 is directly connected with the stationary component, and the motion detection assembly 250 is at least partially accommodated in the housing element 210. In this way, the motion detection assembly 250 can determine the position of the rotating component by detecting the position of the motion feedback assembly 260, thereby achieving the above-mentioned detection function. In actual application, the motion detection assembly 250 can include a circuit board and a position sensor integrated on the circuit board, wherein the position sensor can be a laser sensor or a Hall sensor, etc., which is not limited in the present application. The motion detection assembly 250 can be connected to the control assembly outside the stationary component through a wire, an FPC connecting line or the like.

[0063] It is worth mentioning that, compared with the similar need for two positioning and assembly processes in the related art that the motion detection assembly 250 is connected with the stationary component through the corresponding support, the present application directly connects the motion detection assembly 250 in the driving device with the stationary component, so that the motion detection assembly 250 only needs to complete the positioning and assembly through one positioning and assembly operation, simplifies the assembly process, significantly reduces the assembly complexity, and solves the problem of large assembly precision difference caused by multiple assembly operations, thereby helping to improve the control effect of the cleaning motion of the care head 2000 and improve the user's use experience.

[0064] Moreover, it should be noted that the above rotor element is arranged in a segmented and offset manner along the preset offset angle θk, which not only can weaken the cogging torque, but also can reduce the vibration of the driving device 200, and further ensure the detection accuracy of the motion detection component by cooperating with the improved assembly precision of the motion detection assembly 250, thereby ensuring the control effect of the cleaning motion of the care head 2000.

[0065] Meanwhile, the motion detection component formed by the motion detection assembly 250 and the motion feedback assembly 260 is installed in the housing element 210, avoiding the formation of an outwardly expanding structure outside the housing element 210, so that the overall size of the driving device 200 is reduced, realizing a more compact and miniaturized design, so that the oral cleaner is made more slim, so as to optimize the aesthetics of the electric toothbrush, and also leaves more water storage space inside the oral cleaner to accommodate more flushing liquid, enhancing the overall functionality of the product.

[0066] Regarding the connection mode of the motion detection assembly 250 and the stationary component, the present application provides three implementable embodiments for reference.

[0067] Embodiment one, the motion detection assembly 250 can be directly connected with the housing 211.

[0068] Embodiment two, the motion detection assembly 250 is directly connected with the stator support 220.

[0069] Embodiment three, as shown in Figure 10 and Figure 11 The stationary component can also include a surface covering element 270. The surface covering element 270 at least partially covers the stator support 220 to form an insulation layer to prevent current leakage and accidental short circuit. The motion detection assembly 250 is directly connected with the surface covering element 270.

[0070] It is worth mentioning that the surface covering element 270 is formed integrally with the stator support 220 by injection molding, that is, the surface covering element 270 is formed by injection molding, and the manufacturing precision can be higher, so as to further improve the assembly precision of the motion detection assembly 250 and the surface covering element 270, and further improve the control performance of the driving device 200, and further ensure the consistency of the oscillation of the care head 2000. The material of the surface covering element 270 can be plastic or rubber or thermoplastic elastomer. Therefore, the present application preferably adopts the mode that the motion detection assembly 250 is directly connected with the surface covering element 270, and the subsequent description will also be based on this.

[0071] The above-mentioned motion detection assembly 250 can be connected with the inner circumferential wall of the surface covering element 270, or connected with the outer circumferential wall of the surface covering element 270, or connected with the end of the surface covering element 270.

[0072] For the convenience of understanding, the specific connection structure of the motion detection assembly 250 and the surface covering element 270 is taken as an example of the connection of the end of the motion detection assembly 250 and the surface covering element 270. In an implementable embodiment, the surface covering element 270 extends along the first axis a, and one end of the surface covering element 270 extends to the outside of the stator support 220 to form a connecting portion 271, so that the surface covering element 270 is connected to the motion detection assembly 250 through the connecting portion 271.

[0073] In an implementable embodiment, the motion feedback assembly 260 includes a mounting seat 261 and a position feedback element 262. The mounting seat 261 has a sleeve 2611 and a support back plate 2612. The sleeve 2611 is sleeved on the power output shaft 230 to rotate with the power output shaft 230. One end of the sleeve 2611 extends between the motion detection assembly 250 and the stator support 220, and the support back plate 2612 is located at one end of the sleeve 2611 and extends radially outward from the outer wall of the sleeve 2611 to form a ring. The position feedback element 262 is ring-shaped, and the position feedback element 262 is sleeved on the sleeve 2611, and the side of the position feedback element 262 away from the motion detection assembly 250 is connected to the support back plate 2612.

[0074] It is worth mentioning that one end of the sleeve 2611 passes through the motion detection assembly 250, that is, the motion detection assembly 250 is similar to being sleeved on the sleeve 2611. Compared with the mode that the motion detection assembly 250 and the motion feedback assembly 260 are arranged separately, the sleeve 2611 and the motion detection assembly 250 share space along the first axis a, so that the volume of the driving device 200 and the brush handle assembly 1000 can be further reduced. At the same time, by mounting the position feedback element 262 on the power output shaft 230 through the mounting seat 261, the installation stability of the position feedback element 262 can be improved, and the reliability of the position detection result of the motion detection assembly 250 on the position feedback element 262 can be improved, so that the control effect on the swinging process of the care head 2000 can be improved.

[0075] In actual application, the mounting seat 261 can be a plastic part or a metal part, such as a copper part, to improve the structural strength of the mounting seat 261 and the connection stability of the mounting seat 261 and the power output shaft 230. The mounting seat 261 and the power output shaft 230 can be connected to each other by key connection, bonding, welding, hot setting or cold shrinking, and the present application does not make specific limitation thereon.

[0076] In one implementation, a Hall sensor is integrated on the circuit board of the motion detection component 250, and correspondingly, the position feedback element 262 is a magnetic element. The motion detection component 250 detects the movement position of the position feedback element 262 by magnetic induction to determine the movement position of the rotor element, thereby improving the reliability of the detection results.

[0077] In practical applications, the position feedback element 262 has at least two opposite magnetic poles. Correspondingly, the circuit board of the motion detection component 250 integrates two Hall sensors, which are circumferentially spaced along the first axis a. These two Hall sensors are used to sense the two opposite magnetic poles of the position feedback element 262. The position feedback element 262 can be formed by connecting two magnets with different magnetic poles, or by partially magnetizing the same magnet to form two different magnetic poles; there are no restrictions, as long as the magnetic element has two opposite magnetic poles. The two Hall sensors are installed at two preset positions corresponding to the position feedback element 262. The position feedback element 262 can be detected by the corresponding Hall sensor at either preset position, thereby enabling the circuit board to control the power output shaft 230 to reciprocate between the two preset positions of the position feedback element 262.

[0078] like Figure 2 As shown, in one feasible embodiment, the two ends of the housing element 210 extending along the first axis a (e.g.) Figure 2 Bearings are installed at the left and right ends of the rotor element 210. The power output shaft 230 is rotatably connected to the housing element 210 via these two bearings. A tensioning member 280 is fitted onto the power output shaft 230. The tensioning member 280 has elastic properties and is located under compression between the rotor element and one of the bearings. Thus, the elastic properties of the tensioning member 280 can provide the necessary preload to maintain a tight fit between the bearing and the rotor element, reduce axial movement, avoid affecting the detection effect of the motion detection components, and improve the operating accuracy of the drive device.

[0079] In practical applications, the tensioning element 280 can be an elastic structure such as a spring or a rubber sleeve, and this application does not make specific limitations on this.

[0080] Furthermore, the tensioning element 280 and the motion detection component can be located at opposite ends of the rotor element along the extension direction of the first axis a. This distributed layout achieves rational and optimized utilization of the internal space of the drive device. Simultaneously, arranging the tensioning element 280 and the motion detection component at opposite ends of the first axis a helps reduce potential electromagnetic interference from the tensioning element to the detection accuracy of the motion detection unit.

[0081] like Figure 2As shown, the driving device 200 can only have a driving function, and the power output shaft 230 is solid, and the power output shaft 230 drives the movement of the care head 2000, and the care head 2000 can be a brush head with a cleaning part, wherein the cleaning part can be bristles or other cleaning elements.

[0082] The driving device 200 not only has a driving function, but also can be used as a fluid transmission structure. Specifically, as shown in Figure 1 and as shown in Figure 12 In an implementable embodiment, the brush handle assembly 1000 further comprises a liquid storage chamber 400 and a fluid pumping unit 500 located in the accommodation space 110. The power output shaft 230 has an axial channel 231, a fluid inlet and a fluid outlet in communication with the axial channel 231, the fluid inlet of the axial channel 231 is in communication with the liquid storage chamber 400, and the fluid pumping unit 500 is connected in series on the flow channel of the liquid storage chamber 400 and the fluid inlet of the axial channel 231, so that the fluid pumping unit 500 can extract the fluid in the liquid storage chamber 400 and flow out of the fluid outlet of the axial channel 231 through the axial channel 231. Correspondingly, the care head 2000 has a fluid channel 2100 and a fluid outlet 2200 in communication with the fluid channel 2100, the power output shaft 230 is connected with the care head 2000 and drives the care head 2000 to perform displacement movement, and the fluid outlet of the axial channel 231 is in communication with the fluid channel 2100, and the oral cleaner outputs water flow through the fluid outlet 2200.

[0083] In actual application, the care head 2000 can be a multifunctional brush head integrated with a cleaning part and a fluid outlet 2200, so that the user can perform flushing operation while brushing, or flexibly switch between brushing and flushing during oral cleaning process. Of course, the care head 2000 can be a general term of a brush head with a cleaning part and a brush head with a fluid outlet 2200, and according to the actual use demand of the user, the brush head with the cleaning part is installed on the brush handle assembly 1000 to perform brushing operation, or the brush head with the fluid outlet 2200 is installed on the brush handle assembly 1000 to perform flushing operation.

[0084] Based on the same inventive concept, the application further provides a driving device for oral cleaning, the driving device comprising at least a static part and a rotating part, wherein the static part extends along a first axis a, the static part comprises a housing element 210 and a stator support 220 accommodated in the housing element 210, an inner wall surface of the stator support 220 is provided with a plurality of accommodating tooth grooves 221 arranged around the first axis a, and the extending direction of the accommodating tooth grooves 221 is parallel to the first axis a. The rotating part comprises a power output shaft 230 and at least two rotor assemblies 240 located in the stator support 220, the power output shaft 230 extends along the first axis a and is rotationally connected with the housing element 210, the at least two rotor assemblies 240 are sleeved on the power output shaft 230 and are sequentially stacked along the first axis a, and from a cross section perpendicular to the first axis a, there is a preset misalignment angle θk between adjacent two rotor assemblies 240.

[0085] Further, the driving device 200 further comprises a motion detection assembly 250 and a motion feedback assembly 260, wherein the motion detection assembly 250 is directly connected with the static part and is at least partially accommodated in the housing element 210, the motion feedback assembly 260 is accommodated in the housing element 210, the motion feedback assembly 260 is connected with the rotating part and rotates with the rotating part, and the motion detection assembly 250 detects the motion position of the rotating part through the motion feedback assembly 260.

[0086] Further, the power output shaft 230 comprises an output shaft body 232 and a transmission shaft 233, the output shaft body 232 and the transmission shaft 233 are at least partially jointed, the output shaft body 232 is at least partially located in the housing element 210, and the transmission shaft 233 at least partially extends out of the housing element 210.

[0087] It should be noted that the specific structure of the static part, the rotating part, the motion detection assembly 250 and the motion feedback assembly 260 can refer to the above-mentioned embodiments, and will not be repeated here.

[0088] Based on the same inventive concept, the application further provides a brush handle assembly, the brush handle assembly 1000 can be used as a separate component, the brush handle assembly 1000 comprises a holding housing 100 with an accommodating space 110, the accommodating space 110 is provided with an energy storage component 300 and the above-mentioned driving device 200 for oral cleaning.

[0089] It should be noted that the specific structure of the driving device 200 can refer to the above-mentioned embodiments, and will not be repeated here.

[0090] Wherein, the terms of "upper", "lower" and the like are used to describe the relative position relationship of each structure in the drawings, which is only for the convenience of clear description, and is not used to limit the scope of the application, and the change or adjustment of the relative relationship is also regarded as the scope of the application without substantial change of the technical content.

[0091] It should be noted that: in the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact of the first and second features, or indirect contact of the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0092] In addition, in the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0093] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In the present application, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0094] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced by equivalents; 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 application.

Claims

1. An oral cleaner characterized by, The oral cleaner comprises a handle assembly (1000) and a treatment head (2000), the handle assembly (1000) comprises a holding housing (100) with a containing space (110), and a driving device (200) and an energy storage component (300) arranged in the containing space (110), the treatment head (2000) has a cleaning part at its distal end; the handle assembly (1000) is removably coupled with the treatment head (2000); The driving device (200) is configured to generate a periodic motion; the driving device (200) extending along a first axis (a) comprises at least: A stationary component comprising a housing element (210) and a stator support (220) contained in the housing element (210), an inner wall surface of the stator support (220) is provided with a plurality of containing tooth slots (221) arranged around the first axis (a), and the extending direction of the containing tooth slots (221) is parallel to the first axis (a); A rotating component comprising a power output shaft (230) and at least two rotor assemblies (240) located in the stator support (220), the power output shaft (230) is at least partially contained in the handle assembly (1000) and is configured to engage the treatment head (2000); the power output shaft (230) is configured to transmit the generated periodic motion to the treatment head (2000), so that the cleaning part rotates periodically at least in a first direction around the first axis (a), the power output shaft (230) extends along the first axis (a) and is rotationally connected with the housing element (210), at least two rotor assemblies (240) are sleeved on the power output shaft (230) and are sequentially stacked along the first axis (a), and from a cross section perpendicular to the first axis (a), there is a preset misalignment angle (θk) between adjacent two rotor assemblies (240).

2. The oral cleaner of claim 1, wherein The rotor assembly (240) comprises a rotor support (241), a first magnetic member (242), and a second magnetic member (243) magnetically opposite to the first magnetic member (242), wherein, The rotor support (241) comprises a base (2411) and at least two positioning rib members (2412), the base (2411) has a mounting hole (24111), the base (2411) is sleeved on the power output shaft (230) through the mounting hole (24111), at least two positioning rib members (2412) are arranged on the outer peripheral surface of the base (2411) in an annular array, the outer peripheral surface of the base (2411) and adjacent two positioning rib members (2412) surround a magnet slot (244), and each magnet slot (244) contains the first magnetic member (242) or the second magnetic member (243).

3. The oral cleaner of claim 2, wherein The cross section of the first magnetic member (242) and the cross section of the second magnetic member (243) are both configured as a fan ring.

4. The oral cleaner of claim 2, wherein The base (2411) is connected with the power output shaft (230) through the mounting hole (24111) by interference, and / or the base (2411) is connected with the power output shaft (230) through the mounting hole (24111) by adhesion.

5. The oral cleaner of claim 2, wherein Two adjacent rotor assemblies (240) are attached to each other.

6. The oral cleaner of claim 2, wherein, At least two rotor assemblies (240) are linearly staggered along the first axis (a) according to a preset stagger angle (θk) in the direction perpendicular to the first axis (a).

7. The oral cleaner of claim 6, wherein The rotor assembly (240) has three, the accommodating tooth groove (221) has six, the first magnetic member (242) and the second magnetic member (243) of each rotor assembly (240) have two and are staggered, and the preset stagger angle (θk) of two adjacent rotor assemblies (240) is 10°.

8. The oral cleaner of claim 6, wherein, The rotor assembly (240) has three, the accommodating tooth groove (221) has three, the first magnetic member (242) and the second magnetic member (243) of each rotor assembly (240) have one, and the preset stagger angle (θk) of two adjacent rotor assemblies (240) is 20°.

9. The oral cleaner of claim 1, wherein, The rotor assembly (240) has at least four; At least four rotor assemblies (240) are sequentially staggered and crossed in the direction perpendicular to the first axis (a).

10. The oral cleaner of claim 1, wherein, The rotor assembly (240) has at least three; At least three rotor assemblies (240) are staggered in a V shape in the direction perpendicular to the first axis (a).

11. The oral cleaner of claim 1, wherein, The maximum diameter of the rotor assembly (240) is 7mm±2mm, and the maximum diameter of the driving device (200) is 17.1mm±10mm.

12. The oral cleaner according to any one of claims 1 to 11, characterized in that, The driving device (200) further comprises a motion detection assembly (250) and a motion feedback assembly (260), wherein, The motion detection assembly (250) is directly connected with the stationary part and is at least partially accommodated in the housing element (210); The motion feedback assembly (260) is accommodated in the housing element (210), the motion feedback assembly (260) is connected with the rotating part and rotates with the rotating part, and the motion detection assembly (250) detects the motion position of the rotating part through the motion feedback assembly (260).

13. The oral cleaner of claim 12, wherein, The stationary part further comprises a surface covering element (270); The surface covering element (270) is at least partially wrapped on the stator support (220), the surface covering element (270) extends along the first axis (a), and one end of the surface covering element (270) extends to the outside of the stator support (220) to form a connecting portion (271), so that the surface covering element (270) is connected with the motion detection assembly (250) through the connecting portion (271).

14. The oral cleaner of claim 12, wherein, The motion feedback assembly (260) comprises a mounting seat (261) and a position feedback element (262); The mounting base (261) has a sleeve (2611) and a support back plate (2612), the sleeve (2611) is sleeved on the power output shaft (230), one end of the sleeve (2611) extends to between the motion detection assembly (250) and the stator support (220) through the motion detection assembly (250), the support back plate (2612) is located at one end of the sleeve (2611), and the support back plate (2612) extends radially outward from the outer wall surface of the sleeve (2611) to form a ring shape; The position feedback component (262) in a ring shape is sleeved on the sleeve (2611), and the side of the position feedback component (262) away from the motion detection assembly (250) is connected with the support back plate (2612) in abutment.

15. The oral cleaner according to any one of claims 1 to 11, wherein The brush handle assembly (1000) further comprises a liquid storage chamber (400) and a fluid pumping unit (500) located in the accommodation space (110); The power output shaft (230) has an axial channel (231), and a fluid inlet and a fluid outlet in communication with the axial channel (231), the fluid inlet of the axial channel (231) can be in communication with the liquid storage chamber (400), and the fluid pumping unit (500) is connected in series on the flow channel connecting the fluid inlet of the axial channel (231) and the liquid storage chamber (400), so that the fluid pumping unit (500) can extract the fluid in the liquid storage chamber (400) and flow out from the fluid outlet of the axial channel (231) through the axial channel (231); The care head (2000) has a fluid channel (2100) and a flow outlet (2200) in communication with the fluid channel (2100), the power output shaft (230) is connected with the care head (2000) and drives the care head (2000) to perform displacement movement, and the fluid outlet of the axial channel (231) is in communication with the fluid channel (2100), and the oral cleaner outputs water flow through the flow outlet (2200).

16. A drive device for oral cleaning, characterized in that The driving device at least comprises: A stationary component extending along a first axis (a) includes a housing element (210) and a stator support (220) accommodated in the housing element (210), an inner wall surface of the stator support (220) is provided with a plurality of accommodation tooth grooves (221) arranged around the first axis (a), and the extension direction of the accommodation tooth grooves (221) is parallel to the first axis (a); The rotating part comprises a power output shaft (230) and at least two rotor assemblies (240) located in the stator support (220), the power output shaft (230) extends along the first axis (a) and is rotationally connected with the shell element (210), the at least two rotor assemblies (240) are sleeved on the power output shaft (230) and are sequentially stacked along the first axis (a), and adjacent two rotor assemblies (240) have a preset misalignment angle (θk) from a cross section perpendicular to the first axis (a).

17. Drive device for oral cleaning according to claim 16, characterized in that The driving device (200) further comprises a motion detection assembly (250) and a motion feedback assembly (260), wherein, The motion detection assembly (250) is directly connected with the stationary part and is at least partially accommodated in the shell element (210); The motion feedback assembly (260) is accommodated in the shell element (210), the motion feedback assembly (260) is connected with the rotating part and rotates with the rotating part, and the motion detection assembly (250) detects the motion position of the rotating part through the motion feedback assembly (260).

18. The drive device for oral cleaning according to claim 16, characterized by, The power output shaft (230) comprises an output shaft body (232) and a transmission shaft (233), the output shaft body (232) and the transmission shaft (233) are at least partially jointed, the output shaft body (232) is at least partially located in the shell element (210), and the transmission shaft (233) at least partially extends out of the shell element (210).

Images