Driving device for oral cleaning, brush handle assembly, and axial auxiliary member

Abstract

Provided are a driving device for oral cleaning, a brush handle assembly, and an axial auxiliary member (400). The driving device comprises at least a housing component (100), a power output shaft (200), an axial driving component (300), an axial auxiliary component (400), and a servo rotating assembly (500). The housing component (100) extends along a first axis (101) and is provided with an accommodating chamber (102). The power output shaft (200) extends along the first axis (101) and passes through the axial driving component (300), the axial auxiliary component (400), and the servo rotating assembly (500), and at least one end of the power output shaft (200) extends out of the housing component (100). The axial auxiliary component (400) is connected to the power output shaft (200) and the housing component (100), and when the axial driving component (300) drives the power output shaft (200) to move along the first axis (101), the axial auxiliary component (400) is configured to resist the movement of the power output shaft (200) along the first axis (101), so as to limit the range of movement of the power output shaft (200) on the first axis (101). The driving device can provide more movement directions for a brush head, so as to improve the oral cleaning effect.

Description

Drive device, handle assembly and axial aid for oral cleaning

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 2024113395366, filed on September 24, 2024, entitled “Drive device, handle assembly and axial aid for oral cleaning”. The entire contents of this Chinese Patent Application are incorporated by reference into this application. TECHNICAL FIELD

[0003] The present application relates to the technical field of oral cleaning appliances, and in particular to a drive device, handle assembly and axial aid for oral cleaning. BACKGROUND

[0004] With the continuous improvement of people's living standards, electric toothbrushes have begun to enter people's daily lives, replacing traditional toothbrushes to achieve more ideal and more convenient brushing effects.

[0005] However, the electric toothbrushes on the market mainly produce a small angle of rotational swing around their axis by the output shaft on the electric toothbrush, thereby driving the reciprocating swing of the brush head to easily clean the teeth. However, this kind of mode cannot provide more desired movements to provide more efficient and more comprehensive tooth cleaning to help users maintain good oral hygiene. SUMMARY

[0006] The purpose of the present application is to provide a drive device, handle assembly and axial aid for oral cleaning, which can provide more movement directions for the brush head to improve the oral cleaning effect.

[0007] To achieve the above-mentioned purpose, the present application provides a drive device for oral cleaning in one aspect, which at least comprises a housing assembly, a power output shaft, an axial driving assembly, an axial auxiliary assembly and a servo rotation assembly, wherein the housing assembly extends along a first axis and has a receiving cavity; the axial driving assembly, the axial auxiliary assembly and the servo rotation assembly are arranged along the first axis, and the axial auxiliary assembly and the servo rotation assembly are at least partially located in the receiving cavity, the power output shaft extends along the first axis and passes through the axial driving assembly, the axial auxiliary assembly and the servo rotation assembly respectively, and at least one end of the power output shaft extends to the outside of the housing assembly; the axial auxiliary assembly is connected with the power output shaft and the housing assembly respectively, when the axial driving assembly drives the power output shaft to move along the first axis, the axial auxiliary assembly is configured to resist the movement of the power output shaft along the first axis to limit the movement range of the power output shaft on the first axis.

[0008] Therefore, compared with the single swing movement of the power output shaft in the related art, the power output shaft can simultaneously have the axial movement, the rotation movement and the combined movement function of the axial movement and the rotation movement by driving the power output shaft to make the reciprocating linear movement in the axial direction by the axial driving assembly and to make the reciprocating swing movement by the servo rotation assembly. When the driving device is applied to the oral cleaning device such as the electric toothbrush and the flushing integrated machine, the improved scheme of the present application can greatly enrich the movement types of the brush head, so that the brush head can not only realize the high-frequency vibration and swing through the rotation, but also realize the high-frequency vibration and swing through the axial movement, or the combined movement of any combination of the four movement modes, thereby providing more expected movements, meeting different cleaning needs and improving the oral cleaning effect. Moreover, the servo rotation assembly integrates the servo control function, which can realize the high-precision and high-repetitive position, speed and torque control during driving the brush head to rotate by the servo rotation assembly, has fast dynamic response and tracking performance, can reach the set speed in a very short time and accurately track the instruction, can realize smooth speed regulation in a wide speed range, and further improves the user experience.

[0009] Meanwhile, the driving device also integrates the axial auxiliary assembly for limiting the movement range of the power output shaft on the first axis, so as to ensure that the power output shaft can stably reciprocate in the axial direction and does not affect the driving of the servo rotation assembly and the detection control formed by the movement detection assembly. In this way, the driving device can ensure reliable and stable movement while ensuring that more movement directions are provided for the brush head to improve the oral cleaning effect.

[0010] Optionally, the axial auxiliary assembly comprises a first auxiliary member, wherein the first auxiliary member comprises an inscribed part rotationally connected with the power output shaft and a deformation part connecting the inscribed part and the housing assembly; when the axial driving assembly drives the power output shaft to move along the first axis, the driving force of the axial driving assembly overcomes the elastic force of the deformation part to make the deformation part elastically deform, and the movement range of the power output shaft on the first axis is limited under the action of the elastic force of the deformation part.

[0011] Optionally, the first auxiliary member further comprises an circumscribed part; the circumscribed part is connected with the inscribed part to form an integrated structure through the deformation part, so that the deformation part is connected with the housing assembly through the circumscribed part.

[0012] Optionally, the deformation part comprises a deformation body, the deformation body, the inner connecting part and the outer connecting part are annular and coaxially spaced, and the deformation body is located between the inner connecting part and the outer connecting part; the outer wall surface of the deformation body is connected with the inner wall surface of the outer connecting part through at least two first connecting arms, and the inner wall surface of the deformation body is connected with the outer wall surface of the inner connecting part through at least two second connecting arms.

[0013] Optionally, the at least two first connecting arms are arranged in a ring array with the axis of the deformation body as the center, and the at least two second connecting arms are arranged in a ring array with the axis of the deformation body as the center.

[0014] Optionally, the first connecting arms and the second connecting arms are both two, and the connecting line of the two first connecting arms is perpendicular to the connecting line of the two second connecting arms.

[0015] Optionally, the part of the deformation body located between any adjacent first connecting arm and second connecting arm is defined as a deformation segment; along the extension direction of the deformation segment, the thickness of the deformation segment gradually increases from the middle region of the deformation segment to both ends of the deformation segment.

[0016] Optionally, the thickness (D1) of both ends of the deformation segment is between 0.7mm and 1.1mm, and the thickness (D2) of the middle region of the deformation segment is between 0.3mm and 0.5mm.

[0017] Optionally, the width (D3) of the first connecting arms and the second connecting arms is between 1.3mm and 1.8mm.

[0018] Optionally, the axial auxiliary assembly further comprises a first bearing; the inner ring of the first bearing is sleeved on the power output shaft, and the outer ring of the first bearing is fixedly connected with the inner connecting part, so that the inner connecting part is rotationally connected with the power output shaft through the first bearing.

[0019] Optionally, the inner connecting part is annular, and the inner connecting part is provided with a first opening and a second opening at both ends along the first axis respectively, and the inner connecting part is provided with a supporting part adjacent to one end of the first opening, and the supporting part extends radially inward from the inner wall surface of the inner connecting part.

[0020] Optionally, the first bearing is installed into the inner part of the inner connecting part through the second opening, and the supporting part abuts against the outer ring of the first bearing, and the supporting part does not extend to the inner ring of the first bearing.

[0021] Optionally, the deformation part is arranged adjacent to the supporting part in a direction parallel to the first axis.

[0022] Optionally, the axial auxiliary assembly further comprises a second auxiliary member; the first auxiliary member and the second auxiliary member are arranged along the first axis, and the first auxiliary member and the second auxiliary member are identical in structure and symmetrically arranged about a middle surface of the first auxiliary member and the second auxiliary member.

[0023] Optionally, the servo rotation assembly comprises a rotation driving assembly and a motion detecting assembly, wherein the rotation driving assembly comprises a stator element and a rotor element, the stator element is fixedly connected with the housing assembly, and the rotor element is fixedly connected with the power output shaft; the motion detecting assembly at least partially located in the accommodating chamber comprises a motion detecting component and a motion feedback component, the motion detecting component is directly connected with the stator element, the motion feedback component is connected with the power output shaft and rotates with the power output shaft, and the motion detecting component detects the rotation position of the power output shaft through the motion feedback component.

[0024] Optionally, the stator element comprises a stator support and a surface covering element, the surface covering element at least covers the stator support, and the motion detecting component is connected with the surface covering element.

[0025] Optionally, the axial driving assembly comprises a primary element and a secondary element, wherein the primary element is fixedly connected with the housing assembly, and the secondary element is annular, is sleeved on the power output shaft and rotates with the power output shaft.

[0026] To achieve the above-mentioned purpose, the application further provides a brush handle assembly, which comprises at least a holding housing, an energy storage component and the above-mentioned driving device for oral cleaning installed in the holding housing; the energy storage component is electrically connected with the driving device, and the power output shaft of the driving device extends out of the holding housing.

[0027] Optionally, the power output shaft has an axial channel, and a fluid inlet and a fluid outlet which are in communication with the axial channel.

[0028] To achieve the above-mentioned purpose, the application further provides an oral cleaning device, which comprises at least a treatment head and the above-mentioned brush handle assembly, and the treatment head is detachably connected with the power output shaft.

[0029] To achieve the above object, the application further provides a mouth cleaner, which comprises a handle assembly and a nursing head, wherein the nursing head has a fluid channel and a fluid outlet connected with the fluid channel, the power output shaft is connected with the nursing head and drives the nursing head to perform displacement movement, and the fluid outlet of the axial channel is connected with the fluid channel, and the mouth cleaner outputs water flow through the fluid outlet.

[0030] To achieve the above object, the application further provides an axial auxiliary part, which comprises an inner connecting part, a deformation part and an outer connecting part, wherein the inner connecting part and the outer connecting part are annular, the inner connecting part is located in the outer connecting part, and the inner connecting part and the outer connecting part are coaxial and spaced apart; the deformation part is connected with the inner connecting part and the outer connecting part respectively, and the deformation part has elastic properties.

[0031] Optionally, the deformation part comprises an annular deformation main body, which is located between the inner connecting part and the outer connecting part, and the deformation main body is coaxial and spaced apart from the inner connecting part and the outer connecting part respectively; the outer wall surface of the deformation main body is connected with the inner wall surface of the outer connecting part through at least two first connecting arms, and the inner wall surface of the deformation main body is connected with the outer wall surface of the inner connecting part through at least two second connecting arms.

[0032] Optionally, the first connecting arms and the second connecting arms are both two, and the connecting line of the two first connecting arms is perpendicular to the connecting line of the two second connecting arms. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0034] Fig. 1 is a perspective view of a driving device in an embodiment provided by the application;

[0035] Fig. 2 is a semi-partial view of the driving device in an embodiment provided by the application;

[0036] Fig. 3 is a semi-partial view of the first auxiliary part after being connected with the first bearing in an embodiment provided by the application;

[0037] Fig. 4 is a front view of the first auxiliary part in an embodiment provided by the application;

[0038] Fig. 5 is a front view of the deformation part in an embodiment provided by the application;

[0039] Fig. 6 is a perspective view of a deformation portion according to an embodiment of the present application;

[0040] Fig. 7 is a semi-perspective view of a servo rotation assembly connected to a power output shaft according to an embodiment of the present application;

[0041] Fig. 8 is a perspective view of a stator element connected to a motion detection assembly according to an embodiment of the present application;

[0042] Fig. 9 is a semi-perspective view of a partial structure of a driving device according to an embodiment of the present application;

[0043] Fig. 10 is a perspective view of a brush handle assembly according to an embodiment of the present application;

[0044] Fig. 11 is a perspective view of an oral cavity cleaner according to an embodiment of the present application.

[0045] BRIEF DESCRIPTION OF THE DRAWINGS 100, housing assembly; 101, first axis; 102, accommodating chamber; 110, outer housing; 120, attachment section; 200, power output shaft; 210, axial passage; 300, axial driving assembly; 310, primary element; 320, secondary element; 400, axial auxiliary assembly; 410, first auxiliary; 411, inner connection portion; 412, deformation portion; 4121, deformation main body; 41211, deformation section; 4122, first connection arm; 4123, second connection arm; 413, outer connection portion; 414, supporting portion; 420, first bearing; 430, second auxiliary; 500, servo rotation assembly; 510, rotation driving assembly; 511, stator element; 5111, stator support; 5112, surface covering element; 512, rotor element; 520, motion detection assembly; 521, motion detection component; 522, motion feedback component; 610, holding housing; 620, energy storage component; 630, fluid storage chamber; 640, fluid pumping unit; 650, treatment head; 651, fluid passage; 652, fluid outlet. DETAILED DESCRIPTION

[0046] As described in the background, the electric toothbrushes on the market mainly produce a small angle of rotational swing of the output shaft of the driving device on the electric toothbrush around its axis, thereby driving the reciprocating swing of the brush head to easily clean the teeth. For example, in the related art, the driving device in the electric toothbrush adopts a sonic motor. When the sonic motor swings at a high frequency, the output shaft of the sonic motor swings around the swing direction of the output shaft, without axial movement and combined movement of the axial direction and the swing direction. The action is single, and the function is monotonous. Correspondingly, the brush head connected with the output shaft of the sonic motor only has the swing cleaning in the swing direction, and lacks the transverse cleaning effect. There are still places with insufficient cleaning force or dead angles between the teeth and the interdental spaces. The cleaning effect is not complete and thorough.

[0047] To solve the above technical problems, the present application provides an electric toothbrush. The electric toothbrush comprises a driving device, an output shaft, a brush head, an axial driving assembly and a rotation driving assembly. The driving device is arranged on the electric toothbrush. The output shaft is arranged in the driving device. The brush head is arranged on the output shaft. The axial driving assembly is arranged in the driving device. The rotation driving assembly is arranged in the driving device. The axial driving assembly is connected with the output shaft. The rotation driving assembly is connected with the output shaft. The axial driving assembly drives the output shaft to move in the axial direction of the output shaft. The rotation driving assembly drives the output shaft to rotate around the axis of the output shaft. The brush head is driven by the output shaft to move in the axial direction of the output shaft and rotate around the axis of the output shaft.

[0048] However, in order to meet the oral cleaning needs of users, and in order to prevent the sensing distance between the Hall sensor and the sensing magnet from being too far and causing failure, the axial movement distance of the output shaft is usually controlled to be about 1 mm. However, the related axial driving assembly cannot achieve such fine reciprocating movement. Therefore, the present application further adds an axial auxiliary member in the driving device to assist the output shaft in achieving axial reciprocating movement while not affecting the driving of the rotation driving assembly and the sensing control formed by the Hall sensor and the sensing magnet. In this way, the driving device can be ensured to move reliably and stably while providing more movement directions for the brush head to improve the oral cleaning effect.

[0049] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all embodiments of the present application.

[0050] The application provides a driving device which can be used in oral cavity cleaning, for example, the driving device can be used as a power source and applied to an electric toothbrush or a flushing integrated machine to drive the brush head shaft of the electric toothbrush or the flushing integrated machine to move axially and / or vibrate at a high frequency and / or swing back and forth, so as to improve the cleaning efficiency. Of course, the driving device can also be applied to other cleaning devices which need axial movement and / or high-frequency vibration and / or back-and-forth swinging, and the application does not make specific limitations in this regard.

[0051] Specifically, please refer to FIGS. 1-2, in an implementable embodiment, the driving device can at least include a housing assembly 100 which serves as the main component of the driving device and is mainly used to support and / or protect other components of the driving device. The housing assembly 100 can be configured in a cylindrical shape, a first axis 101 can be the center line of the housing assembly 100, that is, the gravity points of each cross section of the housing assembly 100 can be located on the first axis 101, and the housing assembly 100 can extend along the first axis 101. The housing assembly 100 is surrounded to form an accommodation chamber 102.

[0052] In the embodiment, the driving device can further include a power output shaft 200, an axial driving assembly 300, an axial auxiliary assembly 400 and a servo rotation assembly 500, and the power output shaft 200, the axial driving assembly 300, the axial auxiliary assembly 400 and the servo rotation assembly 500 are installed on the housing assembly 100. The servo rotation assembly 500 is used to drive the power output shaft 200 to swing back and forth around the first axis 101, and the servo rotation assembly 500 integrates a servo control function, which can accurately detect the rotation speed, angle, torque of the power output shaft 200 and / or detect the rotation position of the power output shaft 200 to perform a reversing operation, so as to control the power output shaft 200 to swing reversely at a preset position, so as to adjust the parameters according to the actual needs of the user to obtain more desired movements. The axial driving assembly 300 is used to drive the power output shaft 200 to move back and forth linearly along the first axis 101, and the axial auxiliary assembly 400 is connected with the power output shaft 200 and the housing assembly 100 respectively. When the axial driving assembly 300 drives the power output shaft 200 to move along the first axis 101, the axial auxiliary assembly 400 is configured to resist the movement of the power output shaft 200 along the first axis 101, so as to limit the movement range of the power output shaft 200 on the first axis 101, avoid the problem that the power output shaft 200 moves too much to cause the axial driving assembly 300 to be unable to drive the power output shaft 200 to move reversely, and the movement detection component of the servo rotation assembly 500 is too far away to cause poor detection accuracy, so as to ensure that the axial driving assembly 300 can stably drive the power output shaft 200 to move back and forth, and the accuracy of the detection function of the servo rotation assembly 500.

[0053] In practical applications, the axial driving assembly 300 can be located at least partially in the accommodation chamber 102, or can be externally arranged in the accommodation chamber 102. The axial auxiliary assembly 400 and the servo rotation assembly 500 are located at least partially in the accommodation chamber 102, and the axial driving assembly 300, the axial auxiliary assembly 400 and the servo rotation assembly 500 are arranged along the first axis 101. The power output shaft 200 extends along the first axis 101 and passes through the axial driving assembly 300, the axial auxiliary assembly 400 and the servo rotation assembly 500 respectively, and at least one end of the power output shaft 200 extends to the outside of the shell assembly 100. The axial auxiliary assembly 400 can be directly connected to the shell assembly 100, or can be indirectly connected to the shell assembly 100 through a mounting bracket in the shell assembly 100, which is not limited in the present application.

[0054] It is worth mentioning that, compared with the power output shaft 200 in the related art which can only perform a single swing motion, the present application is to integrate the axial driving assembly 300 and the servo rotation assembly 500 in the driving device at the same time, drive the power output shaft 200 to move reciprocatingly in the axial direction by the axial driving assembly 300, and drive the power output shaft 200 to swing reciprocatingly by the servo rotation assembly 500, so that the power output shaft 200 can simultaneously have the functions of axial movement, rotation and combined movement of axial movement and rotation. When the driving device is applied to an oral cleaning device such as an electric toothbrush and a flushing integrated machine, the improved scheme of the present application can greatly enrich the movement types of the brush head, so that the brush head can not only realize high-frequency vibration and swing through rotation, but also realize high-frequency vibration and swing through axial movement, or combined movement of any combination of the four movement modes, thereby providing more desired movements, meeting different cleaning needs and improving oral cleaning effect. Moreover, the servo rotation assembly 500 integrates the servo control function, which can realize high-precision and high-repetitive position, speed and torque control during driving the brush head to rotate by the servo rotation assembly 500, has fast dynamic response and tracking performance, can reach the set speed and accurately track the instruction in a very short time, can realize smooth speed regulation in a wide speed range, and further improves the user experience.

[0055] Meanwhile, the driving device also integrates the axial auxiliary assembly 400 for limiting the movement range of the power output shaft 200 on the first axis 101, to ensure that the power output shaft 200 can stably reciprocate in the axial direction, and does not affect the driving of the servo rotation assembly 500 and the detection control formed by the movement detection assembly thereof. In this way, the driving device can be ensured to move reliably and stably while ensuring to provide more movement directions for the brush head to improve the oral cleaning effect.

[0056] Regarding the specific structure of the axial auxiliary assembly 400, in an implementable embodiment, the axial auxiliary assembly 400 can have a limiting groove, and the power output shaft 200 is provided with an extension block located in the limiting groove. When the power output shaft 200 reciprocates along the first axis 101, the power output shaft 200 can be blocked by the contact between the inner side wall of the limiting groove and the extension block, thereby resisting the movement of the power output shaft 200 along the first axis 101, so as to limit the movement range of the power output shaft 200 along the first axis 101.

[0057] In actual application, considering that the power output shaft 200 also has rotational motion, the extension block and / or the limiting groove can be configured as a ring or arc structure, so that the extension block is located in the limiting groove at any angle of rotation of the power output shaft 200.

[0058] As shown in FIGS. 2 to 4, in another optional embodiment, the axial auxiliary assembly 400 can include a first auxiliary member 410, which includes an inner joint portion 411 and a deformation portion 412, wherein the inner joint portion 411 is rotationally connected with the power output shaft 200, and the inner joint portion 411 does not have relative motion with the power output shaft 200 along the first axis 101, and the deformation portion 412 is used to connect the inner joint portion 411 with the housing assembly 100. In this way, when the axial driving assembly 300 drives the power output shaft 200 to move along the first axis 101, the driving force of the axial driving assembly 300 can overcome the elastic force of the deformation portion 412 to cause the deformation portion 412 to elastically deform, or in other words, the elastic deformation of the deformation portion 412 can be used to drive the power output shaft 200 to move along the first axis 101. Moreover, as the deformation degree of the deformation portion 412 increases, the elastic force of the deformation portion 412 also gradually increases, and when the driving force generated by the axial driving assembly 300 is smaller than the elastic force of the deformation portion 412, the power output shaft 200 can be further limited to move by the elastic force of the deformation portion 412, thereby limiting the movement range of the power output shaft 200 along the first axis 101 under the action of the elastic force of the deformation portion 412.

[0059] In this way, the first auxiliary member 410 can limit the movement range of the power output shaft 200 along the first axis 101 by using the elastic force of the deformation portion 412, so as to ensure that the power output shaft 200 can stably reciprocate in the axial direction, and does not affect the driving of the servo rotation assembly 500 and the sensing control formed by the motion detection assembly, can ensure the reliable and stable movement of the driving device while ensuring that more movement directions are provided for the brush head to improve the oral cleaning effect. At the same time, the first auxiliary member 410 can also use its own rigidity to avoid the movement of the power output shaft 200 along the first axis 101 when it does not need to move along the first axis 101, so as to avoid affecting the user's experience.

[0060] In order to facilitate the installation operation of the first auxiliary member 410, in an implementable embodiment, the first auxiliary member 410 can further comprise an outer connecting portion 413, which is connected with the inner connecting portion 411 through the deformation portion 412 to form an integrated structure, so that the outer connecting portion 413, the deformation portion 412 and the inner connecting portion 411 can be integrally installed into the accommodating cavity 102, thereby facilitating the installation operation. Correspondingly, when the outer connecting portion 413, the deformation portion 412 and the inner connecting portion 411 are integrally installed into the accommodating cavity 102, the deformation portion 412 can be connected with the shell assembly 100 through the outer connecting portion 413, so that the outer connecting portion 413 can be fixed relative to the shell assembly 100.

[0061] In actual application, the outer connecting portion 413 can be connected and fixed with the inner wall surface of the shell assembly 100 through interference or gluing of the outer wall surface thereof. The outer connecting portion 413 can also be positioned through cooperation of the outer wall surface thereof with the inner wall surface of the shell assembly 100, and fixed through abutting with the internal support of the shell assembly 100.

[0062] The above-mentioned outer connecting portion 413 and inner connecting portion 411 can be configured in any shape, such as ring shape, rectangular shape or arc shape, etc.

[0063] Preferably, the outer connecting portion 413 and the inner connecting portion 411 can be configured in ring shape. The outer diameter of the outer connecting portion 413 is substantially the same as the inner diameter of the shell assembly 100, so that the radial position of the outer connecting portion 413 can be limited through cooperation of the outer wall surface thereof with the inner wall surface of the shell assembly 100, thereby ensuring the accuracy of the radial position of the outer connecting portion 413. Meanwhile, the inner connecting portion 411 in ring shape is also convenient for rotational connection with the power output shaft 200. In actual application, the outer diameter of the outer connecting portion 413 can be determined according to the inner diameter of the shell assembly 100, and the outer diameter of the outer connecting portion 413 can be between 17 mm and 20 mm.

[0064] As shown in FIGS. 3-6, in an implementable embodiment, the deformation portion 412 can include a deformation body 4121, at least two first connecting arms 4122, and at least two second connecting arms 4123. The deformation body 4121 is annular, and the deformation body 4121, the inner connecting portion 411, and the outer connecting portion 413 are coaxial and spaced apart, with the deformation body 4121 located between the inner connecting portion 411 and the outer connecting portion 413. The outer wall surface of the deformation body 4121 is connected to the inner wall surface of the outer connecting portion 413 through the at least two first connecting arms 4122, and the inner wall surface of the deformation body 4121 is connected to the outer wall surface of the inner connecting portion 411 through the at least two second connecting arms 4123. In this way, the connection reliability between the inner connecting portion 411 and the outer connecting portion 413 can be ensured, and the possibility of breakage can be reduced. At the same time, by connecting the deformation body 4121, the inner connecting portion 411, and the outer connecting portion 413 through the connecting arms, the overall resistance capacity of the deformation portion 412 is reduced, so that when the power output shaft 200 is forced to move along the first axis 101, the deformation portion 412 can be elastically deformed appropriately to allow the power output shaft 200 to move along the first axis 101.

[0065] In the present embodiment, the at least two first connecting arms 4122 can be arranged at least partially non-equidistantly about the axis of the deformation body 4121. And / or, the at least two second connecting arms 4123 can be arranged at least partially non-equidistantly about the axis of the deformation body 4121.

[0066] Of course, the at least two first connecting arms 4122 can also be arranged in a ring array about the axis of the deformation body 4121, and the at least two second connecting arms 4123 can also be arranged in a ring array about the axis of the deformation body 4121. The ring array arrangement refers to a layout mode in which points are arranged equidistantly about a center point in a ring shape. In this way, when the power output shaft 200 drives the inner connecting portion 411 to move along the first axis 101, the inner connecting portion 411 can uniformly transmit the force to the deformation body 4121 through the at least two second connecting arms 4123, and the deformation body 4121 can uniformly transmit the force to the two first connecting arms 4122, so that the deformation portion 412 is uniformly elastically deformed, avoiding breakage caused by uneven force.

[0067] In actual application, the number of the first connecting arms 4122 can be the same as or different from the number of the second connecting arms 4123. When the number of the first connecting arms 4122 is the same as the number of the second connecting arms 4123, the number of the first connecting arms 4122 and the number of the second connecting arms 4123 can each be two, three, four, five, six, etc. The width of the deformation body 4121 can be between 1.4 mm and 2 mm.

[0068] The width D3 of the first connecting arm 4122 and the second connecting arm 4123 can be between 1.3 mm and 1.8 mm, so as to ensure the structural strength of the first connecting arm 4122 and the second connecting arm 4123.

[0069] For example, the number of the first connecting arm 4122 and the number of the second connecting arm 4123 can both be two, and the line connecting the two first connecting arms 4122 is perpendicular to the line connecting the two second connecting arms 4123. In this way, the distance between the adjacent first connecting arm 4122 and the second connecting arm 4123 can be increased as much as possible, so that the deformation part 412 can produce a larger elastic deformation when the inner fitting part 411 is subjected to a force in the direction of the first axis 101, so as to meet the distance requirement of the power output shaft 200 moving in the direction of the first axis 101.

[0070] In order to further improve the elastic deformation degree of the deformation part 412, as shown in FIG. 6, in an implementable embodiment, for the convenience of description, the part of the deformation main body 4121 between any adjacent first connecting arm 4122 and second connecting arm 4123 is defined as a deformation segment 41211 (as the part divided by the two dashed lines in FIG. 6), which is in the shape of an arc segment. The thickness of the deformation segment 41211 gradually increases from the middle region of the deformation segment 41211 to the two ends of the deformation segment 41211 along the extension direction of the deformation segment 41211. That is, the thickness of the connection between the deformation main body 4121, the first connecting arm 4122 and the second connecting arm 4123 is large, and gradually decreases away from the connection between the deformation main body 4121, the first connecting arm 4122 and the second connecting arm 4123, so that the deformation main body 4121 can further elastically deform to a certain extent in the area with small thickness, and the elastic deformation degree of the deformation part 412 is improved. Moreover, the thickness is increased at the connection between the deformation main body 4121, the first connecting arm 4122 and the second connecting arm 4123, so as to ensure the overall structural reliability of the first auxiliary part 410 and avoid the problem of fracture at the connection.

[0071] In actual application, the thickness D1 of the two ends of the deformation segment 41211 is between 0.7 mm and 1.1 mm, and the thickness D2 of the middle region of the deformation segment 41211 is between 0.3 mm and 0.5 mm. In this way, the elastic deformation degree of the deformation part 412 can be improved while ensuring the overall structural reliability of the first auxiliary part 410.

[0072] As shown in FIG. 3, in an implementable embodiment, the axial auxiliary assembly 400 can further include a first bearing 420. In this case, the inner ring of the first bearing 420 is sleeved on the power output shaft 200, and the outer ring of the first bearing 420 is fixedly connected with the inner connecting portion 411, so that the inner connecting portion 411 is rotatably connected with the power output shaft 200 through the first bearing 420. In this way, the first bearing 420 can be used to reduce the friction between the inner connecting portion 411 and the power output shaft 200, avoid relative wear between the two, improve the service life, and also reduce the resistance generated by the inner connecting portion 411 when the power output shaft 200 rotates, so as to ensure the stable movement of the power output shaft 200.

[0073] In actual application, the inner ring of the first bearing 420 and the power output shaft 200, and the outer ring of the first bearing 420 and the inner connecting portion 411 can be fixed by tight fitting and gluing, or other connection methods, which are not limited in the present application.

[0074] In an implementable embodiment, the annular inner connecting portion 411 is provided with a first opening and a second opening at two ends along the first axis 101, and the inner connecting portion 411 is provided with a supporting portion 414 at one end adjacent to the first opening, which extends radially inward from the inner wall surface of the inner connecting portion 411. The first bearing 420 can be installed into the inner connecting portion 411 through the second opening, and the supporting portion 414 abuts against the outer ring side surface of the first bearing 420, and the supporting portion 414 does not extend to the inner ring of the first bearing 420. That is, the supporting portion 414 does not affect the rotational movement of the power output shaft 200, but when the power output shaft 200 moves along the first axis 101 towards the supporting portion 414, the power output shaft 200 can push the supporting portion 414 through the first bearing 420 to drive the inner connecting portion 411 to move, thereby driving the elastic deformation of the deformed portion 412. In this way, the supporting portion 414 can receive the force of the power output shaft 200 along the first axis 101 towards the supporting portion 414 of the first auxiliary piece 410, thereby avoiding the problem of connection failure between the power output shaft 200 and the inner wall surface of the inner connecting portion 411 due to the force on the connection between the power output shaft 200 and the inner connecting portion 411, improving the use reliability and service life of the driving device.

[0075] In actual application, the supporting portion 414 can be annular, and the supporting portion 414 is arranged around the inner ring of the first opening, and the inner hole diameter of the supporting portion 414 should be not less than the diameter of the power output shaft 200, so that the power output shaft 200 can pass through the inner hole of the supporting portion 414. Of course, the supporting portion 414 can also be composed of at least two blocking blocks.

[0076] As to the arrangement position of the deformation portion 412 on the inscribed portion 411, in an implementable embodiment, along the direction parallel to the first axis 101, the deformation portion 412 can be located at the middle position of the inscribed portion 411, or can be located away from the bearing portion 414.

[0077] As shown in FIG. 3, in another optional embodiment, along the direction parallel to the first axis 101, the deformation portion 412 is arranged adjacent to the bearing portion 414.

[0078] It can be understood that when the power output shaft 200 moves along the first axis 101 towards the bearing portion 414, the main force of the power output shaft 200 acts on the bearing portion 414, that is, the force point of the main force of the power output shaft 200 on the inscribed portion 411 is located at one end of the bearing portion 414. By arranging the deformation portion 412 adjacent to the bearing portion 414, the distance between the deformation portion 412 and the main force point can be reduced, thereby shortening the force arm of the deformation portion 412 in the axial direction, and further reducing the moment of the deformation portion 412 in the radial direction, avoiding the problem of tensile fracture of the deformation portion 412 in the radial direction, and improving the service life of the first auxiliary member 410.

[0079] As shown in FIG. 2, in an implementable embodiment, the axial auxiliary assembly 400 can further include a second auxiliary member 430. The first auxiliary member 410 and the second auxiliary member 430 are arranged along the first axis 101, the first auxiliary member 410 and the second auxiliary member 430 are the same in structure, and are symmetrically arranged about the middle surface of the first auxiliary member 410 and the second auxiliary member 430. In this way, the bearing portion 414 of the first auxiliary member 410 and the bearing portion 414 of the second auxiliary member 430 are also symmetrically arranged, so that no matter which end of the first axis 101 the power output shaft 200 moves along, there is a bearing portion 414 to bear the force of the power output shaft 200 along the first axis 101, further avoiding the problem that the connection between the power output shaft 200 and the inner wall surface of the inscribed portion 411 is stressed, resulting in the failure of the connection between the power output shaft 200 and the inscribed portion 411, and improving the use reliability and service life of the driving device.

[0080] In actual application, the second auxiliary member 430 is also connected with the power output shaft 200 through a bearing, and the outer ring side surface of the bearing abuts against the bearing portion 414 of the second auxiliary member 430. The first auxiliary member 410 and the second auxiliary member 430 can be located at opposite ends of the servo rotating assembly 500 along the first axis 101, and the first auxiliary member 410 is located between the servo rotating assembly 500 and the axial driving assembly 300.

[0081] As shown in FIGS. 7 and 8, in an implementable embodiment, the servo rotation assembly 500 includes a rotation driving assembly 510 and a motion detecting assembly 520, wherein the rotation driving assembly 510 includes a stator element 511 fixedly connected with the housing assembly 100 and a rotor element 512 fixedly connected with the power output shaft 200, the stator element 511 is arranged at least partially around the rotor element 512, when the stator element 511 is energized, the magnetic field generated by the stator element 511 and the magnetic field generated by the rotor element 512 are coupled to form a rotating magnetic field, and when the rotating magnetic field changes, the rotor element 512 drives the power output shaft 200 to rotate to realize the rotation motion.

[0082] The motion detecting assembly 520 is at least partially located in the accommodating chamber 102, and includes a motion detecting component 521 and a motion feedback component 522, the motion detecting component 521 is directly connected with the stator element 511, and the motion feedback component 522 is connected with the power output shaft 200 and rotates with the power output shaft 200, the motion detecting component 521 determines the rotation position of the power output shaft 200 through the motion feedback component 522, thereby realizing the above-mentioned servo control function. In actual application, the motion detecting component 521 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 are not limited in the present application. The motion detecting component 521 can be connected to the control assembly outside the accommodating chamber 102 through a wire, an FPC connecting line or the like.

[0083] It is worth mentioning that, compared with the similar need for twice positioning and assembling process in the related art that the motion detecting component 521 is connected with the housing assembly 100 through a corresponding support, the present application directly connects the motion detecting component 521 in the driving device with the stator element 511, so that the motion detecting component 521 only needs one positioning and assembling operation to complete the positioning and assembling, simplifies the assembling process, significantly reduces the assembling complexity, and solves the problem of large difference in assembling precision caused by multiple assembling. When the driving device is applied to an oral cleaning device such as an electric toothbrush and a flushing integrated machine, the improved scheme of the present application can greatly improve the consistency of the assembling precision of the motion detecting component 521, thereby helping to provide the control effect of the cleaning motion of the electric toothbrush, and improving the user's experience.

[0084] Meanwhile, the motion detection assembly 520 is installed in the accommodating chamber 102, which is composed of the motion detection component 521 and the motion feedback component 522. That is, the motion detection assembly 520 is built in the housing assembly 100, which avoids forming an outwardly expanding structure outside the housing assembly 100, so that the overall size of the driving device is reduced, and a more compact and miniaturized design is achieved. When the driving device is applied to an oral cleaning device such as an electric toothbrush and a brushing and flushing integrated machine, the compact structure of the present application not only makes the oral cleaning device thinner and smaller to optimize the aesthetics of the electric toothbrush, but also leaves more space for the oral cleaning device to store more flushing liquid, thereby enhancing the overall functionality of the product.

[0085] Further, the stator element 511 can include a stator support 5111 and a surface covering element 5112, and the surface covering element 5112 at least partially covers the stator support 5111 to form an insulation layer to prevent current leakage and accidental short circuit. The motion detection component 521 is directly connected to the surface covering element 5112. In actual application, the material of the surface covering element 5112 can be plastic or rubber or thermoplastic elastomer.

[0086] It is worth mentioning that the surface covering element 5112 is formed integrally with the stator support 5111 by injection molding, that is, the surface covering element 5112 is formed by injection molding, and the manufacturing precision can be higher, so as to further improve the assembly precision of the motion detection component 521 and the surface covering element 5112, and further improve the control performance of the driving device, and further ensure the consistency of the brush head swing.

[0087] Regarding the specific structure of the axial driving assembly 300, as shown in FIG. 9, in an implementable embodiment, the axial driving assembly 300 includes a primary element 310 and a secondary element 320, wherein the primary element 310 is fixedly connected with the housing assembly 100, and the secondary element 320 is sleeved on the power output shaft 200 and rotates with the power output shaft 200. When the current passes through the primary element 310, the magnetic field generated by the primary element 310 and the magnetic field generated by the secondary element 320 are coupled to form a translational magnetic field, and when the translational magnetic field changes, the secondary element 320 can drive the power output shaft 200 to move along the first axis 101.

[0088] In actual application, the specific structure of the axial driving assembly 300 can refer to the existing shaft type linear motor structure, which will not be described herein.

[0089] In an implementable embodiment, the housing assembly 100 can be a one-piece structure, and the housing assembly 100 is provided with an opening at one end along the first axis 101, which is in communication with the accommodating chamber 102, and the axial driving assembly 300, the axial auxiliary assembly 400 and the servo rotating assembly 500 are respectively mounted to the housing assembly 100 through the opening.

[0090] In another alternative embodiment, as shown in FIG. 2, the housing assembly 100 can also adopt a multi-segment splicing structure. Specifically, the housing assembly 100 can include an outer housing 110 and an attachment segment 120, the outer housing 110 is provided with an opening at one end along the first axis 101, the attachment segment 120 is annular, and the attachment segment 120 is inserted into the opening at one end of the outer housing 110 along the first axis 101, and the attachment segment 120 is coaxially arranged with the outer housing 110.

[0091] In actual application, the second auxiliary member 430 can be first mounted to the chamber formed by the outer housing 110 through the opening of the outer housing 110, and then the rotating driving assembly 510, the motion detection assembly 520 and the first auxiliary member 410 are sequentially mounted to the chamber formed by the outer housing 110 through the opening of the outer housing 110. Then, the attachment segment 120 is inserted into the opening of the outer housing 110 and the axial driving assembly 300 is mounted.

[0092] As shown in FIG. 10, based on the same inventive concept, the present application also provides a brush handle assembly. Specifically, the brush handle assembly can at least include a holding housing 610, and an energy storage component 620 and the above-mentioned driving device for oral cleaning installed in the holding housing 610. The energy storage component 620 is electrically connected with the driving device, and the power output shaft 200 of the driving device extends out of the holding housing 610.

[0093] In actual application, in order to facilitate the user to hold, the holding housing 610 can be shaped like an elongated body, and the cross-sectional shape of the holding housing 610 can be circular or non-circular (such as D-shaped, oval, polygonal, etc.). The specific structure of the energy storage component 620 can refer to the existing battery, which will not be described here.

[0094] In an implementable embodiment, the above-mentioned brush handle assembly can be applied to an electric toothbrush or other oral cleaner as a power part and a holding part. When the brush handle assembly is applied to an oral cleaner, the power output shaft 200 of the brush handle assembly is detachably connected with a care head 650 (such as a toothbrush head or other accessory with bristles), so as to drive the care head 650 to move by the power output shaft 200.

[0095] Further, as shown in FIG. 7 and FIG. 11, the above-mentioned brush handle assembly can also integrate the functions of oscillation and flushing into one, and be applied to a flushing all-in-one machine. Specifically, the brush handle assembly further comprises a liquid storage chamber 630 and a fluid pumping unit 640 located in the holding shell 610. The power output shaft 200 has an axial channel 210, and a fluid inlet and a fluid outlet in communication with the axial channel 210. The fluid inlet of the axial channel 210 can be in communication with the liquid storage chamber 630, and the fluid pumping unit 640 is connected in series on the flow channel of the liquid storage chamber 630 and the fluid inlet of the axial channel 210, so that the fluid pumping unit 640 can extract the fluid in the liquid storage chamber 630 and flow out from the fluid outlet of the axial channel 210 through the axial channel 210.

[0096] In an implementable embodiment, the above-mentioned brush handle assembly can be applied to a flushing all-in-one machine or other oral cleaning device. When the brush handle assembly is applied to an oral cleaning device, the care head 650 (such as a flushing all-in-one head or other accessory with bristles) of the oral cleaning device has a fluid channel 651 and a flow outlet 652 in communication with the fluid channel 651. The power output shaft 200 is connected with the care head 650 and drives the care head 650 to perform displacement movement, and the fluid outlet of the axial channel 210 is in communication with the fluid channel 651, and the oral cleaning device outputs water flow through the flow outlet 652.

[0097] It should be noted that the specific structure of the driving device can refer to the above-mentioned content, and the present application will not be described here.

[0098] Based on the same inventive concept, as shown in FIG. 4 to FIG. 6, the present application also provides an axial auxiliary part, which at least comprises an inner connecting part 411, a deformation part 412 and an outer connecting part 413. The inner connecting part 411 and the outer connecting part 413 are both annular, the inner connecting part 411 is located in the outer connecting part 413, and the inner connecting part 411 and the outer connecting part 413 are coaxial and spaced apart; the deformation part 412 is connected with the inner connecting part 411 and the outer connecting part 413 respectively, and the deformation part 412 has elastic properties.

[0099] Further, the deformation part 412 comprises an annular deformation main body 4121, which is located between the inner connecting part 411 and the outer connecting part 413, and the deformation main body 4121 is coaxially and spaced apart from the inner connecting part 411 and the outer connecting part 413 respectively; the outer wall surface of the deformation main body 4121 is connected with the inner wall surface of the outer connecting part 413 through at least two first connecting arms 4122, and the inner wall surface of the deformation main body 4121 is connected with the outer wall surface of the inner connecting part 411 through at least two second connecting arms 4123.

[0100] Further, the first connecting arms 4122 and the second connecting arms 4123 are both two, and the connecting lines of the two first connecting arms 4122 are perpendicular to the connecting lines of the two second connecting arms 4123.

[0101] It should be noted that the specific structure of the axial auxiliary member can refer to the content described above with respect to the first auxiliary member 410, and the present application will not be described again here.

[0102] It should be noted that the terms "upper", "lower", and the like are used to describe the relative positional relationship of the structures in the drawings, and are only for the convenience of clear description, and are not intended to limit the scope of the present application. Changes or adjustments of the relative relationship without substantial changes in technical content are also considered as the scope of the present application.

[0103] 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 between the first and second features, or indirect contact 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.

[0104] In addition, in the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between 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.

[0105] In the description of the present specification, 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 specification, 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.

[0106] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but 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: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A drive device for oral cleaning, characterized in that The driving device for oral cleaning comprises at least a housing assembly (100), a power output shaft (200), an axial driving assembly (300), an axial auxiliary assembly (400) and a servo rotation assembly (500), wherein, The housing assembly (100) extends along a first axis (101) and has a receiving cavity (102); The axial driving assembly (300), the axial auxiliary assembly (400) and the servo rotation assembly (500) are arranged along the first axis (101), and the axial auxiliary assembly (400) and the servo rotation assembly (500) are at least partially located in the receiving cavity (102); the power output shaft (200) extends along the first axis (101) and passes through the axial driving assembly (300), the axial auxiliary assembly (400) and the servo rotation assembly (500) respectively, and at least one end of the power output shaft (200) extends to the outside of the housing assembly (100); The axial auxiliary assembly (400) is connected with the power output shaft (200) and the housing assembly (100) respectively, and is configured to resist the movement of the power output shaft (200) along the first axis (101) when the axial driving assembly (300) drives the power output shaft (200) to move along the first axis (101), so as to limit the movement range of the power output shaft (200) along the first axis (101).

2. The drive device for oral cleaning according to claim 1, characterized in that, The axial auxiliary assembly (400) comprises a first auxiliary part (410), wherein the first auxiliary part (410) comprises an inscribed part (411) rotationally connected with the power output shaft (200) and a deformation part (412) connecting the inscribed part (411) and the housing assembly (100); When the axial driving assembly (300) drives the power output shaft (200) to move along the first axis (101), the driving force of the axial driving assembly (300) overcomes the elastic force of the deformation part (412) to cause elastic deformation of the deformation part (412), and limits the movement range of the power output shaft (200) along the first axis (101) under the action of the elastic force of the deformation part (412).

3. The drive device for oral cleaning according to claim 2, characterized in that, The first auxiliary part (410) further comprises an circumscribed part (413); The circumscribed part (413) is connected with the inscribed part (411) through the deformation part (412) to form an integral structure, so that the deformation part (412) is connected with the housing assembly (100) through the circumscribed part (413).

4. The drive device for oral cleaning according to claim 3, characterized in that, The deformation part (412) comprises a deformation main body (4121), and the deformation main body (4121), the inscribed part (411) and the circumscribed part (413) are annular and coaxially spaced apart, and the deformation main body (4121) is located between the inscribed part (411) and the circumscribed part (413); The outer wall surface of the deformation main body (4121) is connected with the inner wall surface of the outer connecting part (413) through at least two first connecting arms (4122), and the inner wall surface of the deformation main body (4121) is connected with the outer wall surface of the inner connecting part (411) through at least two second connecting arms (4123).

5. The drive device for oral cleaning according to claim 4, characterized in that, The at least two first connecting arms (4122) are arranged in a ring array with the axis of the deformation main body (4121) as the center, and the at least two second connecting arms (4123) are arranged in a ring array with the axis of the deformation main body (4121) as the center.

6. The drive device for oral cleaning according to claim 5, characterized in that, Both the first connecting arms (4122) and the second connecting arms (4123) have two, and the connecting line of the two first connecting arms (4122) is perpendicular to the connecting line of the two second connecting arms (4123).

7. The drive device for oral cleaning according to claim 6, characterized in that, The part of the deformation main body (4121) located between any adjacent first connecting arm (4122) and second connecting arm (4123) is defined as a deformation section (41211). Along the extension direction of the deformation section (41211), the thickness of the deformation section (41211) gradually increases from the middle region of the deformation section (41211) to both ends of the deformation section (41211).

8. The drive device for oral cleaning according to claim 7, characterized in that, The thickness (D1) of both ends of the deformation section (41211) is between 0.7mm and 1.1mm. The thickness (D2) of the middle region of the deformation section (41211) is between 0.3mm and 0.5mm.

9. The drive device for oral cleaning according to claim 4, characterized by, The width (D3) of the first connecting arm (4122) and the second connecting arm (4123) is between 1.3mm and 1.8mm.

10. The drive device for oral cleaning according to claim 3, characterized by, The axial auxiliary assembly (400) further comprises a first bearing (420); The inner ring of the first bearing (420) is sleeved on the power output shaft (200), and the outer ring of the first bearing (420) is fixedly connected with the inner connecting part (411), so that the inner connecting part (411) is rotationally connected with the power output shaft (200) through the first bearing (420).

11. The drive device for oral cleaning according to claim 10, characterized in that, The inner connecting part (411) is annular, and the inner connecting part (411) is provided with a first opening and a second opening at both ends along the first axis (101) respectively, The inner connecting part (411) is provided with a supporting part (414) adjacent to one end of the first opening, and the supporting part (414) extends radially inward from the inner wall surface of the inner connecting part (411); The first bearing (420) is installed into the inner part of the inner connecting part (411) through the second opening, and the supporting part (414) abuts against the outer ring of the first bearing (420), and the supporting part (414) does not extend to the inner ring of the first bearing (420).

12. The drive device for oral cleaning according to claim 11, characterized in that, The deformation part (412) is arranged adjacent to the supporting part (414) in a direction parallel to the first axis (101).

13. The drive device for oral cleaning according to claim 12, characterized in that, The axial auxiliary assembly (400) further comprises a second auxiliary part (430); The first auxiliary member (410) and the second auxiliary member (430) are arranged along the first axis (101), and the first auxiliary member (410) and the second auxiliary member (430) are identical in structure and symmetrically arranged about the middle surface of the first auxiliary member (410) and the second auxiliary member (430).

14. The drive device for oral cleaning according to any one of claims 1 to 13, characterized in that, The servo rotating assembly (500) comprises a rotating driving component (510) and a motion detecting component (520), wherein, The rotating driving component (510) comprises a stator element (511) and a rotor element (512), the stator element (511) is fixedly connected with the shell assembly (100), and the rotor element (512) is fixedly connected with the power output shaft (200); The motion detecting component (520) at least partially located in the accommodating cavity (102) comprises a motion detecting part (521) and a motion feedback part (522), the motion detecting part (521) is directly connected with the stator element (511), the motion feedback part (522) is connected with the power output shaft (200) and rotates with the power output shaft (200), and the motion detecting part (521) detects the rotating position of the power output shaft (200) through the motion feedback part (522).

15. Drive device for oral cleaning according to claim 14, characterized in that The stator element (511) comprises a stator support (5111) and a surface covering element (5112), the surface covering element (5112) at least covers the stator support (5111), and the motion detecting part (521) is connected with the surface covering element (5112).

16. The drive device for oral cleaning according to any one of claims 1 to 13, characterized in that, The axial driving component (300) comprises a primary element (310) and a secondary element (320), wherein, The primary element (310) is fixedly connected with the shell assembly (100), and the secondary element (320) is annular, the secondary element (320) is sleeved on the power output shaft (200) and rotates with the power output shaft (200).

17. A handle assembly comprising: The brush handle assembly at least comprises a holding shell (610), and an energy storage component (620) and the driving device for oral cleaning according to any one of claims 1 to 16 installed in the holding shell (610); The energy storage component (620) is electrically connected with the driving device, and the power output shaft (200) of the driving device extends out of the holding shell (610).

18. The brush handle assembly of claim 17, wherein, Therefore, the power output shaft (200) has an axial channel (210), and a fluid inlet and a fluid outlet in communication with the axial channel (210).

19. An oral cleaner characterized by, The oral cleaner at least comprises a treatment head (650) and the brush handle assembly according to claim 17, and the treatment head (650) is detachably connected with the power output shaft (200).

20. An oral cleaner characterized by, The oral cleaner at least comprises a treatment head (650) and the brush handle assembly according to claim 18; The care head (650) has a fluid channel (651) and a flow outlet (652) in communication with the fluid channel (651), the power output shaft (200) is connected with the care head (650) and drives the care head (650) to perform displacement movement, and the fluid outlet of the axial channel (210) is in communication with the fluid channel (651), and the oral cleaner outputs water flow through the flow outlet (652).

21. An axial assist characterized by, The axial auxiliary member at least comprises an inner connecting part (411), a deformation part (412) and an outer connecting part (413), wherein, The inner connecting part (411) and the outer connecting part (413) are both annular, the inner connecting part (411) is located in the outer connecting part (413), and the inner connecting part (411) and the outer connecting part (413) are coaxial and spaced apart; The deformation part (412) is connected with the inner connecting part (411) and the outer connecting part (413) respectively, and the deformation part (412) has elastic properties.

22. The axial assist of claim 21, wherein, The deformation part (412) comprises an annular deformation main body (4121), the deformation main body (4121) is located between the inner connecting part (411) and the outer connecting part (413), and the deformation main body (4121) is coaxially and spaced apart from the inner connecting part (411) and the outer connecting part (413) respectively; The outer wall surface of the deformation main body (4121) is connected with the inner wall surface of the outer connecting part (413) through at least two first connecting arms (4122), and the inner wall surface of the deformation main body (4121) is connected with the outer wall surface of the inner connecting part (411) through at least two second connecting arms (4123).

23. The axial assist of claim 22, wherein, The first connecting arm (4122) and the second connecting arm (4123) are both two, and the connecting line of the two first connecting arms (4122) is perpendicular to the connecting line of the two second connecting arms (4123).

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