Oral cavity cleaning device and oral cavity cleaning equipment

Abstract

The utility model belongs to the technical field of oral cavity cleaning appliances, and particularly relates to an oral cavity cleaning device and oral cavity cleaning equipment. The oral cavity cleaning device comprises a shell and a power assembly. The power assembly comprises a motor and a pump mechanism. One end of the shell is connected with a cleaning accessory which is limited by a separator to form a power chamber and a liquid storage chamber; the motor is fixedly arranged in the power chamber and drives the cleaning accessory to move through the output shaft, the output shaft is provided with a through first channel, and the pump mechanism conveys liquid in the liquid storage chamber to the first channel through the joint piece; the motor also comprises a rotor assembly, a stator assembly and two groups of magnets; the rotor assembly is fixedly arranged on the rotor shaft and is provided with two winding mounting arms which are formed by extending in opposite directions along the radial direction of the rotor shaft; the stator assembly is arranged around the rotor assembly; and the two groups of magnets are arranged on the stator assembly and correspond to the two winding mounting arms respectively. The output shaft not only can drive the cleaning accessory to swing greatly, but also can output the liquid from the cleaning accessory through the first channel.

Description

Technical Field

[0001] This disclosure belongs to the technical field of oral hygiene equipment, and specifically relates to an oral hygiene device and an oral hygiene equipment. Background Technology

[0002] With increasing emphasis on oral hygiene, electric toothbrushes and water flossers have gradually become common household oral care tools. Electric toothbrushes use a motor to drive the brush head to vibrate or rotate at high speed to remove plaque from the tooth surface. Water flossers use nozzles to spray high-pressure water to remove food debris and plaque from hard-to-reach areas between teeth and below the gum line. Combining both into one device provides a more comprehensive and efficient teeth cleaning experience.

[0003] Existing oral hygiene devices often have water tanks that occupy the side of the device, resulting in a small opening and deep depth, making cleaning inconvenient. Alternatively, the water tank may be a separate, disassembled component at the bottom of the device, leading to poorer waterproofing and reliability. Furthermore, the cleaning attachments lack sufficient range of motion, resulting in incomplete oral cleaning. Utility Model Content

[0004] The purpose of this disclosure is to overcome the shortcomings of the prior art and to provide an oral cleaning device and oral cleaning equipment.

[0005] In a first aspect, this disclosure provides an oral hygiene device, comprising:

[0006] A housing, one end of which is connected to a cleaning attachment, and the housing is divided by a partition to form a power chamber and a liquid storage chamber;

[0007] The power assembly includes a motor and a pump mechanism. The motor is fixedly mounted in the power chamber and configured to drive the cleaning attachment to move via an output shaft. The output shaft of the motor has a through first channel. The pump mechanism delivers liquid from the storage chamber to the first channel via a coupling.

[0008] The motor also includes:

[0009] A rotor assembly, the rotor assembly being fixedly mounted on the output shaft and having a first winding mounting arm and a second winding mounting arm extending in opposite directions along the radial direction of the output shaft, the first winding mounting arm and the second winding mounting arm being configured to mount windings.

[0010] A stator assembly, the stator assembly being disposed around the rotor assembly;

[0011] Two sets of magnets are disposed on the stator assembly and respectively corresponding to the two winding mounting arms, and each set of magnets includes two magnets with opposite magnetic properties;

[0012] In at least one plane perpendicular to the axis of rotation of the output shaft, with the intersection of the axis of rotation and the plane as the center, the central angle α of the center lines of the two magnets in the same group ranges from 40° to 50°.

[0013] In one embodiment, in at least one plane perpendicular to the axis of rotation of the output shaft, the included angle β between adjacent sides of two magnets in the same group ranges from 35° to 45°.

[0014] In one embodiment, the single-sided swing angle of the rotor assembly ranges from 5° to 15°.

[0015] In one embodiment, in at least one plane perpendicular to the axis of rotation of the output shaft, the rotor assembly includes a circular circumferential portion fixed to the output shaft, and the winding mounting arm includes an arm portion extending radially from the circular circumferential portion toward the stator assembly side, and two stop portions extending circumferentially in the opposite direction from the arm portion, the winding being wrapped around the arm portion.

[0016] In one embodiment, when the motor is in the equilibrium position, two magnets of the same group are symmetrically arranged with respect to the arm portion of the corresponding winding mounting arm, and the two magnets of the same group overlap with the projection portion of the winding mounting arm that is centrally projected radially with the point of the rotation axis as the projection center.

[0017] In one embodiment, after the winding is energized, under the action of magnetic force, within the swing range of the rotor assembly around the output shaft relative to the stator assembly, the side of the stator assembly facing the rotor assembly is an annular surface, and the side of the winding mounting arm facing the stator assembly is an arc surface, and the radial air gap between the two arc surfaces ranges from 0.1 mm to 0.2 mm.

[0018] In one embodiment, the winding mounting arm facing the stator assembly is an arc surface, and a groove extending along the rotation axis is formed on the arc surface. When in the equilibrium position, the groove is located between the two magnets in the same group.

[0019] In one embodiment, the motor further includes an insulating layer disposed between the winding and the winding mounting arm of the rotor assembly.

[0020] In one embodiment, the stator assembly further includes a housing and a magnet holder adapted to the shape of the housing, the magnet being fixedly disposed within the magnet holder;

[0021] In at least one plane perpendicular to the rotation axis of the output shaft, the housing has a swing space that provides the rotor assembly with a swing space relative to the magnet about the output shaft. The swing space is formed by two arc segments and two straight segments, with the two arc segments being concentric with the rotation axis of the output shaft and the two straight segments being parallel to the extension direction of the winding mounting arm located at the equilibrium position.

[0022] In one embodiment, the cross-sectional shape of the magnet is arc-shaped in at least one plane perpendicular to the rotation axis of the output shaft. The magnet includes an outer arc segment and an inner arc segment distributed radially, and two side edges connecting the corresponding ends of the outer arc segment and the inner arc segment respectively; the central angles of the outer arc segment and the inner arc segment are the same.

[0023] In one embodiment, when the output shaft is driven by a torque component along the circumferential direction of the rotation axis, the output shaft rotates to a first preset position in the direction of the torque component, and then when driven by a torque component in the opposite direction, the output shaft rotates to a second preset position in the opposite direction.

[0024] In one embodiment, the planar projections of the power chamber and the liquid storage chamber along the rotation axis of the output shaft at least partially overlap or do not overlap.

[0025] In one embodiment, the power chamber is further provided with a power source, which is located on the side of the pump mechanism away from the motor, and the motor is located on the side of the pump mechanism closer to the cleaning accessory.

[0026] In one embodiment, the connector has a second channel and a third channel, the second channel connecting the outlet end of the pump mechanism and the first channel, and the third channel connecting the inlet end of the pump mechanism and the storage chamber.

[0027] In one embodiment, the separator is provided with a connecting hole to connect the third channel with the liquid storage chamber.

[0028] In one embodiment, the separator further has a fourth channel for liquid flow, the fourth channel connecting the connecting hole to the side of the reservoir away from the pump mechanism.

[0029] In one embodiment, the partition avoids the power source along the rotation axis of the output shaft to form a clearance chamber accommodating at least a portion of the power source; or,

[0030] The separator avoids the power source along the rotation axis of the output shaft and forms an avoidance chamber with the inner wall of the housing to accommodate at least a portion of the power source.

[0031] In one embodiment, the separator is sealed to the inner wall of the housing.

[0032] In one embodiment, the oral cleaning device further includes a fixing member, which is fixed to the inner wall of the housing and is used to install the power end of the motor and the pump mechanism;

[0033] The valve portion of the outlet end of the pump mechanism is integrated into the fixing member, and the end cap portion of the outlet end is integrated into the connecting member; the power end, at least a portion of the connecting member, and at least a portion of the fixing member are arranged sequentially along the outlet direction of the outlet end.

[0034] Secondly, this disclosure provides an oral cleaning device, including a cleaning attachment and an oral cleaning apparatus as described in any of the above embodiments. The cleaning attachment has an inner cavity and a nozzle communicating with the inner cavity. The output shaft of the motor of the oral cleaning apparatus is connected to the cleaning attachment and drives the cleaning attachment to move, such that the single-sided swing angle of the cleaning attachment is in the range of 5° to 15°. A first channel of the output shaft is communicating with the inner cavity of the cleaning attachment. The pump mechanism outputs water flow impact through the nozzle.

[0035] One of the beneficial effects of this oral cleaning device is that the housing is divided into a power chamber and a liquid storage chamber by a separator. The motor, pump mechanism, etc., are located in the power chamber, effectively achieving a dry and wet separation space, resulting in higher waterproof reliability and easier cleaning of the water tank interior. The structure is more reliable and assembly is simple and convenient. Furthermore, by adjusting the central angle of the center lines of two magnets in the same group, the distance between the two magnets is changed, thereby reducing the motor cogging torque, increasing the electromagnetic force, and increasing the angle of reciprocating oscillation.

[0036] Furthermore, the output shaft of the motor disclosed herein is provided with a through first channel, so that the output shaft of the motor can both drive the cleaning attachment to swing significantly and allow water to flow through the first channel and be output from the cleaning attachment. Attached Figure Description

[0037] Embodiments of this disclosure are illustrated in conjunction with the accompanying drawings, which are included and form part of this specification, and together with their description serve to explain the principles of this disclosure.

[0038] Figure 1 This is an exploded view of an oral cleaning device provided in one embodiment of the present disclosure;

[0039] Figure 2 This is a cross-sectional view of an oral cleaning device provided in an embodiment of this disclosure;

[0040] Figure 3 This is a schematic diagram of the first radial section of the motor of an oral cleaning device provided in an embodiment of the present disclosure;

[0041] Figure 4 This is a schematic diagram of the second radial section of the motor of an oral cleaning device provided in an embodiment of the present disclosure;

[0042] Figure 5 This is a schematic axial cross-sectional view of the motor of an oral cleaning device provided in an embodiment of this disclosure;

[0043] Figure 6 This is a perspective view of the cover of an oral cleaning device provided in an embodiment of the present disclosure;

[0044] Figure 7 This is a perspective view of the motor and pump mechanism of an oral cleaning device provided in an embodiment of the present disclosure;

[0045] Figure 8 This is a partial cross-sectional view of another oral cleaning device provided in one embodiment of the present disclosure;

[0046] Figure 9 This is a partial cross-sectional view of a housing at an airflow channel according to an embodiment of the present disclosure;

[0047] Figure 10 A partial cross-sectional view of another housing at the airflow slot provided in an embodiment of this disclosure;

[0048] Figure 11 This is a partial cross-sectional view of the housing at a location other than the airflow channels, according to an embodiment of this disclosure.

[0049] Figure 12 for Figure 2 An exploded view of the motor, connectors, fasteners, and circuit board is shown.

[0050] Figure 13 for Figure 2 An assembly perspective view showing the couplings, fasteners, and pump mechanism;

[0051] Figure 14 for Figure 2 The exploded view shows the coupling, fastener, and pump mechanism;

[0052] Figure 15 for Figure 2 Partial schematic diagram;

[0053] Figure 16 This is a perspective view of a coupling provided in an embodiment of this application.

[0054] Figures 1 to 16 The correspondence between the component names and the reference numerals in the figures is as follows:

[0055] 100 Shell; 110 Power Chamber; 120 Liquid Storage Chamber; 130 Wall Shell; 140 Cover; 141 Third Sealing Groove; 142 Third Sealing Cavity; 143 Airflow Groove; 144 Flow Guide Groove; 180 Microchannel; 190 Assembly Gap;

[0056] 200 Motor; 210 Output shaft; 211 First channel; 220 Motor housing; 230 Rotor assembly; 231 Winding mounting rod; 2311 Rod portion; 2312 Stop portion; 232 Winding; 233 Circular surrounding portion; 240 Stator assembly; 241 Groove; 242 Magnet base; 250 Magnet; 260 Insulation layer;

[0057] 300 Pump mechanism; 310 Inlet end; 311 First valve section; 312 First end cover section; 320 Outlet end; 321 Second valve section; 322 Second end cover section; 330 Power end;

[0058] 400 Connecting component; 410 Second channel; 411 First flow section; 412 Second flow section; 4121 First arc segment; 4122 Second arc segment; 420 Third channel; 430 First connecting part; 431 Reversing cavity; 432 First inner arc surface; 440 Second connecting part; 441 Second inner arc surface; 442 Cover plate section; 443 Protruding section; 444 Baffle section; 450 Mounting groove;

[0059] 500 Fastener; 510 First mounting part; 520 Second mounting part; 530 Through hole;

[0060] 600 partition; 610 clearance chamber; 680 connecting hole;

[0061] 710 power source; 720 circuit board;

[0062] 810 First seal; 820 Second seal; 830 Third seal; 840 Fourth seal;

[0063] 912 First vibration damper; 913 Second vibration damper; 914 Third vibration damper; 921 First fastener; 922 Second fastener; 923 Third fastener; 924 Fourth fastener;

[0064] 2000 Cleaning accessories; 2100 Brush body; 2200 Inner cavity; 2300 Nozzle. Detailed Implementation

[0065] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0066] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0067] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0068] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0069] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0070] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0071] In this article, "first," "second," etc., are used only to distinguish one another, and not to indicate degree of importance, order, or prerequisite for each other.

[0072] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0073] Existing oral hygiene devices typically have a long and slender body, with the water tank's longitudinal length almost equal to that of the body. Furthermore, the water tank's opening is small, making it difficult for users to clean the inner walls. Alternatively, the water tank may be a separate, disassembled component at the bottom of the device, resulting in poorer waterproofing and reliability. Additionally, the cleaning attachments at the end of the casing lack sufficient range of motion, leading to incomplete oral cleaning.

[0074] This disclosure provides an oral cleaning device comprising a housing and a power assembly. One end of the housing is connected to a cleaning attachment. The housing is divided by a partition to form a power chamber and a liquid storage chamber. The power assembly includes a motor and a pump mechanism. The motor is fixedly disposed within the power chamber and configured to drive the cleaning attachment via an output shaft. The output shaft of the motor has a through-passage first channel. The pump mechanism delivers liquid from the liquid storage chamber to the first channel via a coupling. The motor further includes a rotor assembly, a stator assembly, and two sets of magnets. The rotor assembly is fixedly disposed on the output shaft and has a first winding mounting arm and a second winding mounting arm extending radially in opposite directions along the output shaft. The first and second winding mounting arms are configured to mount windings. The stator assembly surrounds the rotor assembly. The two sets of magnets are disposed on the stator assembly and correspond to the two winding mounting arms, respectively. Each set of magnets includes two magnets with opposite magnetic properties. In at least one plane perpendicular to the rotation axis of the output shaft, with the intersection of the rotation axis and the plane as the center, the central angle α of the centerlines of the two magnets in the same set ranges from 40° to 50°.

[0075] This disclosure uses a separator to divide the housing into a power chamber and a liquid storage chamber. The motor, pump mechanism, etc., are located in the power chamber, effectively achieving a dry and wet separation space, resulting in higher waterproof reliability and easier cleaning of the water tank interior. The structure is more reliable and assembly is simple and convenient. Furthermore, the output shaft of the motor in this disclosure is provided with a through-channel, allowing the motor's output shaft to both drive the cleaning attachment to swing significantly and allow water to flow through the first channel and exit from the cleaning attachment.

[0076] Using the motor disclosed herein, since there is cogging torque during motor operation, the electromagnetic force decreases as the swing angle increases. Adjusting the central angle α of the center lines of two magnets in the same group changes the distance between the two magnets. The larger the central angle α is, the larger the distance between the magnets. At the same time, the farther the center position of the magnet is from the winding mounting arm, the smaller the cogging torque becomes, the greater the electromagnetic force of the motor, and thus the larger the reciprocating swing angle.

[0077] Furthermore, due to the reduction in cogging torque, the electromagnetic force that overcomes the cogging torque during motor rotation decreases, while the electromagnetic force acting on the motor's output torque increases, thereby improving the motor's efficiency, increasing the motor's output torque, and enhancing the motor's load-bearing capacity.

[0078] When the motor is not powered on, the rotor assembly is in the starting position. At this time, the center of the winding mounting arm is furthest from the magnet, and the cogging torque is minimal. The motor's starting characteristics are superior. When the motor's electromagnetic torque overcomes the cogging torque, the swing angle of the rotor assembly can be controlled. The electromagnetic conversion process is relatively simple and direct. When a control signal is received, the motor can react quickly to achieve the change in rotation angle.

[0079] For ease of understanding, please refer to the following: Figures 1 to 16 The specific structure and working principle of the oral cleaning device and oral cleaning equipment disclosed herein will be described in detail with reference to the embodiments.

[0080] Combination Figure 2 and Figure 3 The oral cleaning device disclosed herein includes a housing 100 and a power assembly. One end of the housing 100 is connected to a cleaning attachment 2000. The housing 100 is defined by a partition 600 to form a power chamber 110 and a liquid storage chamber 120. The power assembly includes a motor and a pump mechanism 300. The motor is fixedly disposed within the power chamber 110 and configured to drive the cleaning attachment 2000 via an output shaft 210. The output shaft 210 of the motor has a through-hole first channel 211. The pump mechanism 300 delivers liquid from the liquid storage chamber 120 to the first channel 211 via a coupling 400. The motor further includes a rotor assembly 230, a stator assembly 240, and two sets of magnets 250. A first winding mounting rod and a second winding mounting rod are fixedly mounted on the output shaft 210 and extend in opposite directions along the radial direction of the output shaft 210. The first winding mounting rod and the second winding mounting rod are configured to mount the winding 232. The stator assembly 240 is arranged around the rotor assembly 230. Two sets of magnets 250 are arranged on the stator assembly 240 and are respectively arranged corresponding to the two winding 232 mounting rods 231, and each set of magnets 250 includes two magnets 250 with opposite magnetic properties. In at least one plane perpendicular to the rotation axis of the output shaft 210, with the intersection of the rotation axis and the plane as the center, the central angle α of the center line of the two magnets 250 in the same set ranges from 40° to 50°.

[0081] To facilitate user grip, the housing 100 can be shaped like a slender cylinder. The cross-sectional shape of the housing 100 can be circular or non-circular (such as D-shaped, elliptical, polygonal, etc.). The interior of the housing 100 is hollow, thus having an internal cavity. This internal cavity is divided into a power chamber 110 and a liquid storage chamber 120 to increase the utilization rate of the internal cavity.

[0082] The reservoir 120 may be formed from a housing independent of the housing 100, and the reservoir 120 may be detachably connected to the housing 100 so that the user can remove the reservoir 120 from the housing 100 for cleaning. Alternatively, the reservoir 120 may be formed from the inner wall of the housing 100 and the partition 600.

[0083] Furthermore, to maintain the elongated shape of the housing 100, the motor can be located inside the housing 100 near one end of the cleaning accessory 2000, so that the motor's output shaft 210 can extend out of the end of the housing 100 and connect to the cleaning accessory 2000 (such as a toothbrush head, a flushing head, or other accessories with bristles) to drive the cleaning accessory 2000 to move. The pump mechanism 300 can be located along the rotation axis of the output shaft 210 near the other end of the motor.

[0084] Meanwhile, the output shaft 210 has a first channel 211 extending through it along its axial direction and communicating with the cleaning accessory 2000. The pump mechanism 300 transports the liquid in the storage chamber 120 to the first channel 211 through the coupling 400, and then to the cleaning accessory 2000 to achieve the flushing function. When the liquid passes through the first channel 211, the high-speed rotating output shaft 210 and the first channel 211 still maintain rotation around the axial direction without deviation, so that the output shaft 210, the first channel 211, and the liquid passing through the first channel 211 remain stable in the working state.

[0085] The output shaft 210 is typically made of high-strength alloy steel with a hardened surface. Both ends are fixed to the motor housing 220 by precision ball bearings.

[0086] The rotor assembly 230 is integrally cast from a magnetically conductive material and includes a central circular circumferential portion 233 and a winding mounting rod 231 extending radially from the circular circumferential portion 233 in the opposite direction along the output shaft 210. The circular circumferential portion 233 is fixedly connected, and the winding 232 is mounted around the winding mounting rod 231.

[0087] The stator assembly 240 is typically formed by stacking multiple annular silicon steel sheets and surrounds the rotor assembly 230. The stator assembly 240 also includes a motor housing 220 and a magnet holder 242 adapted to the shape of the motor housing 220, with magnets 250 fixedly disposed within the magnet holder 242. In at least one plane perpendicular to the rotation axis of the output shaft 210, the motor housing 220 has a swing space providing the rotor assembly 230 with the ability to swing relative to the magnets 250 about the output shaft 210. This swing space is formed by two arc segments and two straight segments, with the two arc segments concentric with the rotation axis of the output shaft 210 and the two straight segments parallel to the extension direction of the winding mounting rod 231 located at the equilibrium position. The arc segments of the motor housing 220 adapt to the arc segments of the winding mounting rod 231, allowing the rotor assembly 230 to swing within the arc segments of the motor housing 220. The arrangement of the straight segments compresses the space of the motor, making the overall structure of the motor housing 220 compact.

[0088] The magnets 250 and the winding mounting rods 231 are symmetrically designed. Two magnets 250 with opposite magnetic properties in the same group correspond to one winding mounting rod 231 and are fixedly mounted on the magnet base 242 of the stator assembly 240. The spacing between the magnets 250 can be adjusted by adjusting the position of the magnet base 242 on the motor housing 220 of the stator assembly 240.

[0089] Since the cogging torque is affected by the setting position of the magnet 250, the central angle α of the center lines of the two magnets 250 in the same group is in the range of 40° to 50°, with the intersection of the rotation axis and the plane as the center, in at least one plane perpendicular to the rotation axis of the output shaft 210.

[0090] See Figure 3 and Figure 4 In one embodiment, the included angle β between adjacent sides of two magnets 250 in the same group ranges from 35° to 45° in at least one plane perpendicular to the rotation axis of the output shaft 210.

[0091] In detail, within at least one plane perpendicular to the rotation axis of the output shaft 210, when the central angle α of the center lines of two magnets 250 in the same group is determined, the included angle β between the adjacent sides of the two magnets 250 in the same group determines the shape of the magnets 250 and the minimum value of the side spacing. After multiple experimental measurements, when the included angle β between the adjacent sides of the two magnets 250 in the same group is in the range of 35° to 45°, the cogging torque is reduced, the maximum single-sided swing angle of the rotor assembly 230 can meet the required requirements, and the motor performance is better.

[0092] See Figure 3 and Figure 4 In one embodiment, the single-sided swing angle of the rotor assembly 230 ranges from 5° to 15°.

[0093] Specifically, by adjusting the central angle α of the center lines of the two magnets 250 in the same group and the included angle β between adjacent sides of the two magnets 250 in the same group within preset values, the single-sided swing angle of the rotor assembly 230 is made to range from 5° to 15°, with a maximum single-sided swing angle of 15°. The output shaft 210 can carry the cleaning attachment 2000 to achieve a cleaning range of 30°. Furthermore, due to the small cogging torque at startup, when the electromagnetic torque of the motor overcomes the cogging torque, the rotor assembly 230 can be controlled to swing between -15° and 15°, achieving adjustment of multiple swing modes.

[0094] See Figure 4In one embodiment, in at least one plane perpendicular to the rotation axis of the output shaft 210, the rotor assembly 230 includes a circular circumferential portion 233 surrounding the output shaft 210, the winding mounting rod 231 includes a rod portion 2311 extending radially from the circular circumferential portion 233 toward the side near the stator assembly 240, and two stop portions 2312 extending circumferentially in the opposite direction from the rod portion 2311, the winding 232 being wound around the rod portion 2311.

[0095] Specifically, the circular circumferential portion 233 serves as the connection between the rotor assembly 230 and the output shaft 210. It is mainly used to provide sufficient mechanical strength to support other components on the rotor assembly 230 and is fixedly connected to the output shaft 210, thereby driving the winding mounting rod 231 to swing.

[0096] The rod portion 2311 is the middle part of the rotor assembly 230. It is formed by the circular surrounding portion 233 extending radially in opposite directions and is symmetrically arranged on both sides of the motor output shaft 210. The winding 232 is wound around the rod portion 2311.

[0097] Two stop portions 2312 extend circumferentially from the free end of each rod portion 2311. The two stop portions 2312 and the free end of the rod portion 2311 form a complete arc segment. The radial projection length of the arc segment is greater than the width of the rod portion 2311, which engages the winding 232 on the rod portion 2311 and prevents the winding 232 from falling off the rod portion 2311.

[0098] See Figure 3 and Figure 4 In one embodiment, when the motor is in the equilibrium position, the two magnets 250 of the same group are symmetrically arranged with respect to the rod portion 2311 of the corresponding winding mounting rod 231, and the two magnets 250 of the same group overlap with the projection portion of the winding mounting rod 231 which is projected radially with the point of the rotation axis as the projection center.

[0099] When in the equilibrium position, the two magnets 250 in the same group are equidistant from the winding mounting rod 231, and in at least one plane perpendicular to the rotation axis of the output shaft 210, the two magnets 250 in the same group and the winding mounting rod 231 are symmetrical about the rotation axis. This arrangement makes the magnetic field generated by the magnets 250 uniformly distributed, which is beneficial for the relevant experiments of the motor. At the same time, the cogging torque of the motor is 0 or close to 0 at this time. Starting from the equilibrium position can improve the starting performance of the motor and realize the control of the swing angle of the rotor assembly 230 by electromagnetic force.

[0100] See Figure 3 and Figure 4In one embodiment, after the winding 232 is energized, under the action of magnetic force, within the swing range of the rotor assembly 230 around the output shaft 210 relative to the stator assembly 240, the stator assembly 240 facing the rotor assembly 230 is an annular surface, and the winding mounting rod 231 facing the stator assembly 240 is an arc surface, and the radial air gap between the two arc surfaces ranges from 0.1 mm to 0.2 mm.

[0101] The width of the radial air gap affects the magnetic circuit characteristics of the motor, thus influencing its cogging torque. When the radial air gap width increases, the magnetic reluctance of the motor also increases due to the increased magnetic circuit length between the stator assembly 240 and the rotor assembly 230, resulting in a decrease in the motor's cogging torque. The radial air gap width also affects the motor's electromagnetic induction characteristics, further impacting its cogging torque. When the radial air gap width increases, the magnetic flux density of the rotor assembly 230 decreases, leading to a decrease in the motor's magnetic field strength and consequently, a reduction in the cogging torque. Therefore, increasing the radial air gap width can effectively reduce cogging torque.

[0102] However, increasing the width of the radial air gap will reduce the efficiency and maximum torque of the motor. Therefore, it is necessary to reasonably select the width range of the radial air gap. Preferably, the motor of this disclosure uses a radial air gap width range of 0.1mm to 0.2mm, which achieves the purpose of reducing the motor cogging torque, while ensuring that the motor efficiency and maximum torque meet the working requirements.

[0103] See Figure 4 and Figure 5 In one embodiment, the winding mounting rod 231 facing the stator assembly 240 has an arc surface, and a groove 241 extending along the rotation axis is provided on the arc surface. When in the equilibrium position, the groove 241 is located between two magnets 250 in the same group.

[0104] In detail, the motor generates heat during operation, which significantly affects its performance. The groove 241 increases the surface area of ​​the winding mounting rod 231, helping heat dissipate more quickly. The groove 241 design also improves the mechanical strength of the winding mounting rod 231, reducing the risk of damage to the rotor assembly 230 due to vibration during rotation. Furthermore, the groove 241 can more securely fix the winding 232, preventing displacement or loosening during motor operation.

[0105] See Figure 5 In one embodiment, the motor further includes an insulating layer 260 disposed between the winding 232 and the winding mounting rod 231 of the rotor assembly 230.

[0106] Direct contact between the winding mounting rod 231 and the winding 232 could cause short circuits and other accidents, and to prevent current leakage from the winding 232, an insulation layer 260 is provided between the winding 232 and the winding mounting rod 231 of the rotor assembly 230 to improve the insulation performance between the winding 232 and other components. The insulation layer 260 covers a portion of the circular surrounding portion 233, the rod portion 2311, and the stop portion 2312 of the winding mounting rod 231, exposing only the arc segment formed by the side of the stop portion 2312 near the stator assembly 240 and the free end of the rod portion 2311. This greatly improves the insulation performance.

[0107] See Figure 3 and Figure 4 In one embodiment, the cross-sectional shape of the magnet 250 is arc-shaped in at least one plane perpendicular to the rotation axis of the output shaft 210. The magnet 250 includes an outer arc segment and an inner arc segment distributed radially, and two side edges that respectively connect the corresponding ends of the outer arc segment and the inner arc segment; the central angles of the outer arc segment and the inner arc segment are the same.

[0108] The outer and inner circular arc segments have the same central angle, meaning they are concentric, differing only in radius. This helps ensure radial consistency of the magnetic field, resulting in a more uniform magnetic field within the motor. The two side edges not only connect the inner and outer arc segments but also, due to edge effects in the magnetic field, can cause unnecessary flux loss or interference. Therefore, straight side edges are necessary to facilitate dimensional control and minimize their impact on the magnetic field. A uniform magnetic field helps the motor achieve better performance. Thus, the cross-sectional shape of magnet 250, including the outer and inner circular arc segments and the two side edges connecting them, ensures magnetic field uniformity and maximizes space utilization.

[0109] See Figure 3 and Figure 4 In one embodiment, when the output shaft 210 is driven by a torque component along the circumferential direction of the rotation axis, the output shaft 210 rotates to a first preset position in the direction of the torque component, and then when driven by a torque component in the opposite direction, the output shaft 210 rotates to a second preset position in the opposite direction.

[0110] When the output shaft 210 is driven by a torque component along the circumferential direction of the rotation axis, the output shaft 210 rotates to a first preset position in the direction of the torque component. Subsequently, when driven by a torque component in the opposite direction, the output shaft 210 rotates to a second preset position in the opposite direction.

[0111] Specifically, when in the equilibrium position, the position of rotor assembly 230 is taken as the 0° angle position, i.e., the starting position, and the cogging torque is also 0 or close to 0. Starting from the 0° angle position, rotor assembly 230 deflects to one side by a certain angle θ, which is the single-sided swing angle of rotor assembly 230. When a positive current is applied to the motor, the electromagnetic torque drives rotor assembly 230 to swing counterclockwise. The cogging torque is opposite to the electromagnetic torque, and during the swing of rotor assembly 230, the cogging torque gradually increases. When the single-sided swing angle of rotor assembly 230 exceeds the preset swing angle value, the cogging torque increases to be equal to the magnitude of the electromagnetic torque. At this time, the output torque is 0, and the single-sided swing angle of rotor assembly 230 reaches its maximum value. A reverse current is applied to the motor, and the electromagnetic torque drives the rotor assembly 230 to swing clockwise. After passing the 0° angle position, the cogging torque reverses to the electromagnetic torque, similar to the counter-clockwise swing of the rotor assembly 230. When the single-sided swing angle of the rotor assembly 230 exceeds the preset swing angle value, the cogging torque increases to be equal to the electromagnetic torque. At this point, the output torque is 0, and the single-sided swing angle of the rotor assembly 230 reaches its maximum value. The above process is then repeated. The preset swing angle value is the maximum single-sided swing angle.

[0112] See Figure 2 In one embodiment, the planar projections of the power chamber 110 and the liquid storage chamber 120 along the rotation axis of the output shaft 210 at least partially overlap or do not overlap.

[0113] In detail, the planar projections of the power chamber 110 and the liquid storage chamber 120 on the rotation axis of the output shaft 210 at least partially overlap. This optimizes the spatial layout of the power chamber 110 and the liquid storage chamber 120 of the oral cleaning device, increases the usable space of the power chamber 110 and the liquid storage chamber 120, and shortens the length of the liquid storage chamber 120 along the rotation axis of the output shaft 210, making it easier for the user to clean. It also reduces the width of the oral cleaning device housing 100 in the direction perpendicular to the rotation axis of the output shaft 210, making it easier for the user to hold.

[0114] Alternatively, the planar projections of the power chamber 110 and the liquid storage chamber 120 on the rotation axis of the output shaft 210 do not overlap. This design makes the structure of the liquid storage chamber easier for users to clean, ensuring that every corner can be thoroughly cleaned, thereby improving the user's cleaning experience.

[0115] See Figure 1 and Figure 2 The power room 110 is also equipped with a power source 710, which is located on the side of the pump mechanism 300 away from the motor, while the motor is located on the side of the pump mechanism 300 close to the cleaning accessory 2000.

[0116] In detail, the power source 710 can be a rechargeable battery or a storage battery, which provides electrical energy to the motor-pump mechanism 300 and the circuit board 720. The close proximity of the motor and cleaning accessory 2000 reduces the length of transmission components (such as the output shaft 210), lowers energy loss, and improves drive efficiency. The pump mechanism 300 is located between the motor and the liquid storage chamber 120, with its inlet end 310 and outlet end 320 positioned closer to the liquid storage chamber 120 along the axis of the output shaft 210. This shortens the suction distance between the inlet end 310 and the liquid storage chamber 120, enhancing pumping efficiency.

[0117] Meanwhile, to further enhance the stability and durability of the system, a certain distance is maintained between the liquid outlet 320 of the pump mechanism 300 and the first channel 211 of the motor output shaft 210. This increases the length of the liquid flow path, reduces the direct impact of high-pressure liquid from the pump mechanism 300 outlet 320 on the motor output shaft 210, thereby reducing potential mechanical stress and wear risks, and improving the stability and reliability of the connection.

[0118] See Figure 2 and Figure 7 The connector 400 has a second channel 410 and a third channel 420. The second channel 410 connects the outlet end 320 of the pump mechanism 300 and the first channel 211. The third channel 420 connects the inlet end 310 of the pump mechanism 300 and the storage chamber 120.

[0119] In detail, the second channel 410 is part of the connector 400 and is used to connect the liquid outlet 320 of the pump mechanism 300 to the first channel 211 of the motor output shaft 210. Specifically, after the liquid flows out from the liquid outlet 320 of the pump mechanism 300, it enters the motor output shaft 210 through the second channel 410 and is finally sprayed out through the inner cavity 2200 and nozzle 2300 of the cleaning accessory 2000.

[0120] The second channel 410 may include a first flow section 411 and a second flow section 412 connected in sequence. The first flow section 411 is connected to the liquid outlet 320 of the pump mechanism 300 and extends along the rotation axis of the output shaft 210.

[0121] The second flow section 412 connects the first flow section 411 and the first channel 211, and the second flow section 412 includes a first arc segment. The first arc segment and the first flow section 411 employ a circular arc transition design to reduce the resistance of the channel's inner wall to the liquid, facilitating liquid flow. Furthermore, the first arc segment is higher than the pump mechanism 300, and its arc center faces the pump mechanism 300, allowing the liquid to flow more smoothly towards the first channel 211, thereby further reducing the resistance of the channel's inner wall to the liquid.

[0122] Optionally, the second flow section 412 also includes a second arc segment, which also adopts a circular arc transition design with the first channel 211 to reduce the resistance of the inner wall of the channel to the liquid and facilitate the flow of the liquid. The second arc segment has an arc center facing the motor, so that the second arc segment and the first channel 211 transition smoothly, which is conducive to the flow of the liquid.

[0123] The third channel 420 is also part of the connector 400, and its main function is to connect the liquid storage chamber 120 with the liquid inlet 310 of the pump mechanism 300. Specifically, liquid is drawn from the liquid storage chamber 120 and enters the liquid inlet 310 of the pump mechanism 300 through the third channel 420, and is then pumped to the liquid outlet 320.

[0124] See Figure 2 The separator 600 is provided with a connecting hole 680 to connect the third channel 420 with the liquid storage chamber 120.

[0125] In detail, the third channel 420 is connected to the liquid storage chamber 120 through the connecting hole 680, thereby realizing the flow path of liquid from the liquid storage chamber 120 to the pump mechanism 300, ensuring that the liquid can smoothly enter the pump mechanism 300 from the liquid storage chamber 120.

[0126] To prevent liquid leakage, a seal is provided between the connecting hole 680 and the connecting member 400. Specifically, the outer wall of the connecting member 400 is provided with a second sealing groove, which forms a second sealing cavity with the inner wall of the connecting hole 680. The second sealing member 820 is a second sealing ring, which seals in the second sealing cavity to ensure that liquid does not leak out from the connecting hole 680, thereby enhancing the reliability and durability of the system. The connecting hole 680 enables the power chamber 110 and the liquid storage chamber 120 to work efficiently and collaboratively in a limited space, optimizing the space utilization inside the equipment.

[0127] See Figure 8 The separator 600 also has a fourth channel for liquid flow, which connects the connecting hole 680 to the side of the liquid storage chamber 120 away from the pump mechanism 300.

[0128] In detail, the liquid storage chamber 120 is provided with a fourth channel connecting the bottom of the liquid storage chamber 120 to the connecting hole 680. This channel can be formed by a separate pipe or integrally formed with the separator 600. This ensures that the liquid can efficiently enter the pump mechanism 300 from the liquid storage chamber 120 and be smoothly pumped out, thereby reducing the length of the liquid flow path and improving the efficiency of liquid delivery. At the same time, the second sealing element 820 ensures the sealing of the connecting hole 680, preventing liquid leakage and enhancing the reliability and durability of the system.

[0129] See Figure 1 and Figure 2The partition 600 avoids the power source 710 along the rotation axis of the output shaft 210 to form a clearance chamber 610 that accommodates at least a portion of the power source 710; or, the partition 600 avoids the power source 710 along the rotation axis of the output shaft 210 and forms a clearance chamber 610 that accommodates at least a portion of the power source 710 with the inner wall of the housing 100.

[0130] In detail, in the direction of the rotation axis of the output shaft 210, the power source 710 has a first end face and a second end face that are arranged opposite to each other, and the housing 100 has a corresponding inner top surface and an inner bottom surface. The first end face and the inner top surface are arranged close to the cleaning accessory 2000 along the rotation axis.

[0131] There is a gap between the second end face of the power source 710 and the inner bottom surface of the housing 100, and a gap between the outer side face and the inner wall of the housing 100. That is, the liquid storage chamber 120 can be U-shaped to form a clearance chamber 610, so that at least part of the power source 710 is disposed in the recess of the U-shaped liquid storage chamber 120. In this way, the liquid storage chamber 120 covers the outer side face and the second end face of the power source 710; or, the liquid storage chamber 120 only covers the outer side face of the power source 710, and the second end face of the power source 710 abuts against the inner bottom surface of the housing 100. That is to say, at least part of the end of the power source 710 extending away from the cleaning accessory 2000 along the rotation axis is covered by the liquid storage chamber 120.

[0132] Alternatively, there may be a gap between the second end face of the power source 710 and the inner bottom surface of the housing 100, and at least a portion of the outer side face may abut against the inner wall of the housing 100. In this case, the liquid storage chamber 120 may be L-shaped, forming a clearance chamber 610 together with the inner wall of the housing 100. This allows at least a portion of the power source 710 to be positioned at the opening of the L-shaped liquid storage chamber 120, thus the liquid storage chamber 120 and the inner wall of the housing 100 enclose the outer side face and the second end face of the power source 710. Alternatively, the liquid storage chamber 120 and the inner wall of the housing 100 may only enclose the outer side face of the power source 710, with the second end face of the power source 710 abutting against the inner bottom surface of the housing 100. Similarly, at least a portion of the end of the power source 710 extending along the rotation axis away from the cleaning accessory 2000 is enclosed by the liquid storage chamber 120.

[0133] In this way, the clearance chamber 610 of this disclosure accommodates the power source 710 and provides support for the power source 710 in the direction of rotation along the output shaft 210. At the same time, it also improves the utilization rate of the internal space of the oral cleaning device housing 100 of this disclosure and increases the volume of the liquid storage chamber 120.

[0134] Furthermore, the separator 600 may include a first portion and a second portion extending along the rotation axis of the output shaft 210, with the first portion being closer to the pump mechanism 300 than the second portion. The outer wall of the first portion is shaped to fit the inner wall of the housing 100, and the outer wall of the first portion abuts against the inner wall of the housing 100. The first portion may have a connecting hole 680. At least a partial liquid reservoir 120 may be defined between the outer wall of the second portion and the inner wall of the housing 100.

[0135] See Figure 1 and Figure 2 The separator 600 is sealed to the inner wall of the housing 100.

[0136] Specifically, the separator 600 is detachably connected to the housing 100 so that the user can remove the separator 600 from the housing 100 for cleaning. For sealing purposes, a first seal 810 is provided between the separator 600 and the housing 100. Further, the outer wall of the separator 600 may be provided with a first sealing groove, which forms a first sealing cavity with the inner wall of the housing 100. The first seal 810 may be a first sealing ring, which seals within the first sealing cavity to prevent liquid leakage.

[0137] Furthermore, the partition 600 and the housing 100 can be detachably connected by a snap-fit ​​connection; and / or, the partition 600 and the connecting member 400 (or the fixing member 500 mentioned below) are fastened together by fasteners such as bolts. Further, the fastener connection can be waterproofed. The partition 600 may have a blind hole, and the connecting member 400 or the fixing member 500 may have a threaded hole. A first fastener may pass through the blind hole of the partition 600 and be threaded into the threaded hole of the connecting member 400 or the fixing member 500.

[0138] See Figure 6 and Figure 8 In one embodiment of this disclosure, the separator 600 and the housing 100 may be integral parts formed by integral molding process to facilitate assembly and improve connection strength. This disclosure does not impose any limitations on this.

[0139] Furthermore, a cover 140 is provided at the end of the housing 100 away from the cleaning accessory 2000. The cover 140 can seal the opening of the wall shell 130, so that the wall shell 130 and the cover 140 can be closed to form the inner cavity of the housing 100. The cover 140 and the wall shell 130 can be nested into each other in a predetermined direction. The side wall of the cover 140 can be embedded in the inner cavity of the wall shell 130. This design allows the cover 140 to fit tightly against the internal contour of the wall shell 130, ensuring good sealing and structural stability. Alternatively, the side wall of the cover 140 can be fitted onto the outside of the wall shell 130. This method facilitates installation and disassembly, making it convenient for users to clean the liquid storage chamber 120. The bottom wall of the cover 140 and the wall shell 130 together form part of the liquid storage chamber 120. This not only optimizes space utilization but also improves the sealing performance of the liquid storage chamber 120.

[0140] Furthermore, to ensure the airtightness of the liquid storage chamber 120 from the outside, a third sealing element 830 is provided between the cover 140 and the shell 130. Specifically, the outer surface of the cover 140 is provided with a third sealing groove 141, which forms a third sealing cavity 142 between the third sealing groove 141 and the inner shell wall of the shell 130. The third sealing element 830 is a third sealing ring, which seals in the third sealing cavity 142 to prevent liquid leakage.

[0141] In addition, to ensure a tight seal between the motor output shaft 210 and the coupling 400, a fourth seal 840 is disposed between them. Specifically, the coupling 400 has a mounting groove through which the motor output shaft 210 passes, and the fourth seal 840 is filled between the inner wall of the mounting groove and the motor output shaft 210. This design prevents liquid leakage from the mounting groove, ensuring the integrity of the liquid flow path.

[0142] See Figure 1 and Figure 7 The oral cleaning device also includes a fixing member 500, which is fixed to the inner wall of the housing 100 and is used to install the power end 330 of the motor and pump mechanism 300. The valve portion of the liquid outlet end 320 of the pump mechanism 300 is integrated into the fixing member 500, and the end cap portion of the liquid outlet end 320 is integrated into the connector 400. The power end 330, at least a portion of the connector 400, and at least a portion of the fixing member 500 are arranged sequentially along the liquid outlet direction of the liquid outlet end 320. The separator 600 may have a blind hole, and the connector 400 or the fixing member 500 may have a threaded hole. The first fastener 921 may pass through the blind hole of the separator 600 and be threadedly connected to the threaded hole provided in the connector 400 or the mounting member 500.

[0143] In detail, the second valve portion 321 of the outlet end 320 of the pump mechanism 300 is integrated into the fixing member 500, located between the power end 330 of the pump mechanism 300 and the connecting member 400, and can be connected by a third fastener 923. The fixing member 500 enhances the impact resistance and stability of the valve portion. The second end cap portion 322 of the outlet end 320 is integrated into the connecting member 400; this one-piece design shortens the liquid flow path and improves pumping efficiency.

[0144] Furthermore, the fixing member 500 may have a liquid inlet hole that penetrates the fixing member 500 and communicates with the pump chamber of the pump mechanism 300. A first valve portion 311 of the liquid inlet end 310 may be disposed in the liquid inlet hole, and the first valve portion 311 of the liquid inlet end 310 may allow liquid to be pumped into the pump chamber through the liquid inlet hole and prevent liquid from flowing out through the liquid inlet hole. At least a portion of the connecting member 400 and the first end cap portion 312 of the liquid inlet end 310 may be integrally formed using a one-piece molding process, and the first end cap portion 312 of the liquid inlet end 310 may cover the liquid inlet hole, and the first end cap portion 312 of the liquid inlet end 310 may form a liquid inlet channel communicating with the liquid inlet hole, which may communicate with the third channel 420 of the connecting member 400. Thus, the liquid inlet channel of the first end cap portion 312 of the liquid inlet end 310 can guide the flow direction of the liquid flowing into the liquid inlet hole. In this design, the connector 400 and the first end cap portion 312 of the liquid inlet 310 are integrated into one piece, making the liquid inlet channel and the third channel 420 a single unit. This improves the reliability of the connection at the interface, the smoothness of liquid flow, and the ease of assembly.

[0145] The power end 330, the fixing part 500 and the connecting part 400 are connected in sequence by fasteners to form a stable assembly. Through the integrated design of the fixing part 500 and the connecting part 400, the oral cleaning device achieves multiple effects of vibration isolation and efficient liquid flow, which significantly improves the reliability, assembly efficiency and performance of the product.

[0146] Optionally, the fixing member 500 may have a liquid inlet hole that penetrates the fixing member 500 and can communicate with the pump chamber of the pump mechanism 300. A first valve portion 311 of the liquid inlet end 310 may be provided in the liquid inlet hole, and the first valve portion 311 of the liquid inlet end 310 may allow liquid to be pumped into the pump chamber through the liquid inlet hole and prevent liquid from flowing out through the liquid inlet hole.

[0147] Specifically, the piston 332 reciprocates within the pump chamber, allowing liquid to be pumped into the pump chamber from the inlet hole; the valve at the inlet end 310 is unidirectional to prevent liquid from flowing out through the inlet hole. In this design, the pump chamber and the inlet hole are formed using the fixing member 500, achieving the purpose of integrating the first valve part 311 of the inlet end 310.

[0148] Optionally, at least a portion of the connector 400 and the first end cap portion 312 of the liquid inlet end 310 can be integrally formed using a one-piece molding process. The first end cap portion 312 of the liquid inlet end 310 can cover the liquid inlet hole, and can form a liquid inlet channel communicating with the liquid inlet hole. This liquid inlet channel can communicate with the third channel 420 of the connector 400. Thus, the liquid inlet channel of the first end cap portion 312 of the liquid inlet end 310 can guide the flow direction of the liquid flowing into the liquid inlet hole. In this solution, the connector 400 and the first end cap portion 312 of the liquid inlet end 310 are integrally formed, making the liquid inlet channel and the third channel 420 integral, which helps to improve the connection reliability at the connection point, improve the smoothness of liquid flow, and improve the ease of assembly.

[0149] refer to Figures 12 to 15 Optionally, the fixing member 500 may include a first mounting portion 510, which may have a first side and a second side disposed opposite to each other along the liquid discharge direction of the liquid discharge end 320. The power end 330 of the motor 200 and the pump mechanism 300 may be spaced apart along the axial direction of the output shaft 210 on the first side of the first mounting portion 510. A portion of the coupling member 400, which integrates the second end cap portion 322 of the liquid discharge end 320, may be disposed on the second side of the first mounting portion 510. The fixing member 500 may have a through hole 530 through which the coupling member 400 passes and restricts the coupling member 400 along at least one side along the axial direction of the output shaft 210. In this way, the through hole 530 can be used to restrict the coupling member 400 in order to provide upward support and limit the coupling member 400 to prevent the coupling member 400 from vibrating up and down. Optionally, the circuit board 720 may be mounted on the side of the first mounting portion 510 opposite to the motor 200 by means of a fourth fastener 924. A third damping element 914 may be provided between the circuit board 720 and the inner wall of the housing 100.

[0150] refer to Figure 13 and Figure 14 Optionally, the fastener 500 may further include a second mounting portion 520, which can be mated to the first side of the first mounting portion 510, and the second mounting portion 520 and the first mounting portion 510 can be closed to form a receiving space for enclosing the outer surface of the motor 200. In this way, the fastener 500 encloses the outer surface of the motor 200, so that most of the vibration of the motor 200 is transmitted to the fastener 500, thereby reducing or eliminating the vibration transmitted from the motor 200 to the coupling 400. This reduces the impact of vibration from the power end 330 of the motor 200 on the coupling 400 and improves the connection reliability at the junction of the second channel 410 of the coupling 400 and the first channel 211 of the motor 200. Optionally, refer to... Figure 13 The first mounting part 510 and the second mounting part 520 can be fastened together by the second fastener 922.

[0151] Optionally, a vibration damping element is sandwiched between the first mounting portion 510 and the outer side of the motor 200; and / or, a vibration damping element is sandwiched between the second mounting portion 520 and the outer side of the motor 200. In this way, the vibration transmission between the motor 200 and the fixing member 500 can be reduced by the vibration damping element. For example, Figure 13 In the middle, the first damping component 912 is clamped between the front end of the motor 200 and the fixing component 500, and the second damping component 913 is clamped between the rear end of the motor 200 and the fixing component 500.

[0152] refer to Figure 15 Optionally, the coupling 400 may have a mounting groove 450 through which the output shaft 210 of the motor 200 passes, and a fourth seal 840 may be filled between the inner wall of the mounting groove 450 and the output shaft 210 of the motor 200. Specifically, the first channel 211 of the output shaft 210 and the second channel 410 of the coupling 400 may communicate at the mounting groove 450, and the seal prevents liquid leakage at the communication point.

[0153] Continue to refer to Figure 15 Optionally, the motor 200 may include a motor housing 220 and an output shaft 210. The output shaft 210 of the motor 200 may pass through the motor housing 220, and both axial ends of the output shaft 210 may extend out of the motor housing 220. The bottom surface of the motor housing 220 and the inner wall of the mounting groove 450 may be combined to form a limiting space for restricting the fourth seal 840. This limiting space can restrict the fourth seal 840 at both ends in the axial direction of the output shaft 210. In this way, the bottom surface of the motor housing 220 and the bottom wall of the mounting groove 450 can be used to restrict the fourth seal 840 to prevent the fourth seal 840 from moving with vibration.

[0154] refer to Figure 15 The second channel 410 may include a first flow section 411 and a second flow section 412 connected in sequence. The first flow section 411 is connected to the liquid outlet 320 and can extend along the axis of the output shaft 210, and there is a gap between the first flow section 411 and the first channel 211 in the direction of the second axis. The second flow section 412 can connect the first flow section 411 and the first channel 211, and the second flow section 412 may include a first arc segment 4121, which can be circularly transitioned to the first flow section 411. The circular transition reduces the resistance of the inner wall of the channel to the liquid, which is beneficial to the flow of the liquid.

[0155] Furthermore, the first arc segment 4121 may be higher than the pump mechanism 300, and the first arc segment 4121 may have an arc center facing the pump mechanism 300, so that the liquid flows more gently toward the first channel 211, thereby further reducing the resistance of the channel inner wall to the liquid.

[0156] Optionally, the second flow section 412 further includes a second arc section 4122, which has a circular arc transition with the first channel 211. This circular arc transition reduces the resistance of the channel's inner wall to the liquid, facilitating liquid flow.

[0157] Furthermore, the second arc segment 4122 has an arc center facing the motor 200, so that the second arc segment 4122 smoothly connects with the first channel 211, which is conducive to the flow of liquid.

[0158] refer to Figure 15 and Figure 16 Optionally, the connector 400 may include a first connecting portion 430 and a second connecting portion 440 connected to each other. The first connecting portion 430 may have a first flow section 411 and a reversing cavity 431 communicating with the first flow section 411. The reversing cavity 431 may have a first inner arc surface 432 and may have an opening in the axial direction of the output shaft 210. At least a portion of the second connecting portion 440 may be built into the reversing cavity 431 through the opening of the reversing cavity 431 and may have a second inner arc surface 441. The first inner arc surface 432 and the second inner arc surface 441 may together form a second flow section 412.

[0159] Specifically, the second connecting portion 440 may include a cover plate section 442, a protruding section 443, and a baffle section 444. The protruding section 443 and the baffle section 444 may be connected to both sides of the cover plate section 442 along the axis of the output shaft 210. The cover plate section 442 may cover the reversing cavity 431, and the baffle section 444 may be located in the reversing cavity 431 and may have a second inner arc surface 441. The cover plate section 442 may have a through hole, and the protruding section 443 may surround the outside of the through hole, and the inner cavity of the protruding section 443 may communicate with the through hole. The output shaft 210 may pass through the inner cavity of the protruding section 443 and the through hole, and a fourth sealing element 840 is provided between the output shaft 210 and the inner wall of the protruding section 443. In this way, the protruding section 443 and part of the cover plate section 442 may form the mounting groove 450 mentioned above.

[0160] See Figure 1 and Figure 2 This disclosure provides an oral cleaning device, including a cleaning attachment 2000 and an oral cleaning apparatus as described in any of the preceding embodiments. The cleaning attachment 2000 has an inner cavity 2200 and a nozzle 2300 communicating with the inner cavity 2200. The output shaft 210 of the motor of the oral cleaning apparatus is connected to the cleaning attachment 2000 and drives the cleaning attachment 2000 to move, so that the single-sided swing angle of the cleaning attachment 2000 is in the range of 5° to 15°. The first channel 211 of the output shaft 210 is communicating with the inner cavity 2200 of the cleaning attachment 2000. The pump mechanism 300 outputs water flow impact through the nozzle 2300.

[0161] In detail, the oral cleaning device disclosed herein includes a cleaning attachment 2000 and an oral cleaning apparatus. The cleaning attachment 2000 may include a brush body 2100, which has an inner cavity 2200 and a nozzle 2300 communicating with the inner cavity 2200. Under the action of the oral cleaning apparatus, water is sprayed through the nozzle 2300, and oral cleaning is achieved in conjunction with the movement of the output shaft 210. The output shaft 210 passes through the inner cavity 2200 of the cleaning attachment 2000 and is fixedly connected to it; the first channel 211 of the output shaft 210 communicates with the inner cavity 2200 of the cleaning attachment 2000 to achieve liquid delivery. Furthermore, the maximum single-sided swing angle of the rotor assembly 230 is 15°, and the output shaft 210 can carry the cleaning attachment 2000 to a cleaning range of 30°. In addition, since the cogging torque is small at startup, when the electromagnetic torque of the motor overcomes the cogging torque output, the rotor assembly 230 can be controlled to swing between -15° and 15°, realizing the adjustment of multiple swing modes.

[0162] Furthermore, the oral hygiene equipment includes devices such as electric toothbrushes and electric water flossers. The output shaft 210 of the motor disclosed herein can both drive the cleaning attachment 2000 to swing significantly and allow water to flow through the first channel 211 and be output from the cleaning attachment 2000, thereby improving the oral hygiene equipment's ability to clean the oral cavity.

[0163] Existing oral irrigators often have vents in their water tanks. These vents allow airflow into the tank during pump operation, filling any gaps caused by liquid loss and ensuring communication between the tank's interior and the outside. However, exposed vents negatively impact the aesthetics of the oral irrigator 1000. Furthermore, there's a risk of the vents being blocked when holding the device, potentially interfering with pump operation. Additionally, incorporating the vents internally would require additional ventilation tubing within the internal space, increasing design complexity.

[0164] To address the aforementioned technical problems, this application disassembles the main body into two nestable parts, utilizing the assembly gap between these two parts to connect the inner cavity of the water tank to the outside, thus achieving a hole-free appearance for the device. However, it is difficult to precisely control the assembly gap; some products on the same production line have larger assembly gaps, posing a risk of leakage, while others have smaller gaps, making it difficult for external gas to pass through. Therefore, this application forms a microchannel between the mating surfaces of these two parts. The cross-section of this microchannel can be set to be small, allowing gas flow while blocking liquid outflow. The assembly gap can be made slightly larger to facilitate the passage of external gas and to ensure that the assembly gaps of products on the same production line are not significantly different.

[0165] For details, please refer to Figure 8The housing 100 may include a wall shell 130 and a cover 140. The wall shell 130 may include a top wall and side walls, the side walls of which may be connected to the outer periphery of the top wall and extend along the axial direction of the output shaft 210. The top wall of the wall shell 130 may have a through-hole through which the output shaft 210 of the motor 200 passes. The wall shell 130 may have an opening, which can be used as... Figure 8 The opening shown is located at one end of the housing 130 along the axis of the output shaft 210 and can be positioned opposite the top wall of the housing 130; alternatively, the opening can be located on the side wall of the housing 130.

[0166] The cover 140 can seal the opening of the shell 130, so that the shell 130 and the cover 140 can be closed to form the inner cavity of the outer shell. The cover 140 and the shell 130 can be nested into each other along a preset direction. The preset direction can be the direction of the output shaft 210 axis, or it can be a direction intersecting the output shaft 210 axis.

[0167] Specifically, the cover 140 may include a bottom wall and side walls. The side walls of the cover 140 may be connected to the outer periphery of the bottom wall and extend in a certain direction. The side walls and bottom wall of the cover 140 may form an inner cavity of the cover 140 that is open at one end. The side walls of the cover 140 may be as follows: Figure 3 The cover 140 is embedded in the inner cavity of the shell 130; or, the sidewall of the cover 140 may be fitted onto the outer side of the shell 130. In addition, the cover 140 and the shell 130 may form at least a partial liquid storage chamber 120.

[0168] refer to Figure 6 and Figure 9 The cover 140 may have a first mating surface 145, and the wall shell 130 may have a second mating surface 131 opposite to the first mating surface 145. An assembly gap 190 may be formed between the first mating surface 145 and the second mating surface 131. For example, Figure 8 In this design, the cover 140 can be embedded within the inner cavity of the shell 130. The outer surface of the cover 140 embedded in the shell 130 can be the first mating surface 145, and the outer surface of the shell 130 fitted over the cover 140 can be the second mating surface 131. Alternatively, the cover 140 can be fitted over the outer surface of the shell 130, with the inner surface of the cover 140 serving as the first mating surface 145 and the outer surface of the shell 130 serving as the second mating surface 131. This allows the gas flow channel to be concealed within the device, preventing blockage and providing advantages such as easy ventilation and a non-porous appearance.

[0169] Additionally, a microchannel 180 may be formed between the shell 130 and the cover 140. The microchannel 180 allows gas to pass through along the axial direction of the output shaft 210 and blocks liquid outflow. The microchannel 180 connects the liquid storage chamber 120 to the outside via the assembly gap 190 between the shell 130 and the cover 140. Optionally, in a predetermined direction, the liquid storage chamber 120 may be higher than the microchannel 180, so that the water level in the liquid storage chamber 120 can be higher than that in the microchannel 180.

[0170] Specifically, the liquid level in the reservoir 120 can be higher than that in the microchannel 180, creating a pressure difference between the external air pressure (one atmosphere) and the air pressure in the reservoir 120 (less than one atmosphere). This pressure difference allows gas to flow while preventing liquid outflow, achieving both ventilation and leak prevention. It's worth noting that the phrase "preventing liquid outflow" can be interpreted broadly, meaning that when the oral cleaning device 1000 is stationary or in a normal user grip position, the microchannel 180 prevents liquid outflow. However, vigorous shaking by the user may disrupt surface tension, affecting air pressure and causing liquid to leak from the microchannel 180.

[0171] The following is for reference. Figure 9 and Figure 10 The formation of the microchannel 180 is described below. Specifically, one of the sidewalls of the shell 130 and the cover 140 may be provided with a third sealing groove 141, and the third sealing groove 141 may have an opening facing outward. The sidewall of the other of the shell 130 and the cover 140 may, together with the third sealing groove 141, form a third sealing cavity 142, which is connected to the liquid storage chamber 120 and the outside through the assembly gap 190. The bottom of the third sealing groove 141 may be provided with an airflow groove 143, and the airflow groove 143 may have an opening facing the third sealing cavity 142.

[0172] For example, Figure 9 Zhongyu Figure 10 In this configuration, the cover 140 is embedded within the inner cavity of the shell 130. The side wall of the cover 140 may be provided with a third sealing groove 141, which may have an outward opening. The side wall of the shell 130 and the third sealing groove 141 can together form a third sealing cavity 142. Alternatively, the cover 140 may be fitted over the outer side of the shell 130, and the side wall of the shell 130 may be provided with a third sealing groove 141, which may have an outward opening. The side wall of the cover 140 and the third sealing groove 141 can together form a third sealing cavity 142.

[0173] Figure 11 A cross-sectional view of the housing 100 provided in an embodiment of this application at a location other than the airflow channel 143. (See reference...) Figure 11The housing 100 may further include a third seal 830, which can be clamped between the inner wall of the other of the wall housing 130 and the cover 140 and the bottom of the third sealing groove 141. The cross-sectional shape of the third seal 830 may be circular, polygonal, etc., and the embodiments of this application do not specifically limit the cross-sectional shape of the third seal 830.

[0174] Continue to refer to Figure 9 and Figure 10 The third seal 830 forms a microchannel 180 between its surface near the airflow groove 143 and the airflow groove 143. Thus, the third seal 830 seals the cavity outside the airflow groove 143. A microchannel 180 is formed in the airflow groove 143, allowing gas to flow through while blocking liquid flow. The machining depth of the airflow groove 143 is generally precise, allowing for accurate control of the dimensions of the formed microchannel 180. Therefore, the housing 100 provided in this embodiment not only achieves air passage and liquid blocking but also has a high yield rate. Furthermore, when the pump mechanism 300 draws in liquid, the third seal 830 flattens and deforms, increasing the assembly gap 190 and further facilitating air intake.

[0175] The liquid level difference h formed by the highest liquid level in the storage chamber 120 and the horizontal plane where the airflow tank 143 is located satisfies the following condition: 0 < ρ * g * h ≤ 30% * Po; where ρ represents air density; g represents liquid density; and Po represents one atmosphere of pressure.

[0176] Specifically, the greater the pressure difference between the liquid in the storage chamber 120 and the external atmospheric pressure, the more readily gas can flow from the outside into the storage chamber 120, thus preventing leakage. Conversely, the smaller the pressure difference between the liquid in the storage chamber 120 and the external atmospheric pressure, the less readily gas can flow from the outside into the storage chamber 120, potentially leading to leakage. The inventors of this application have verified that when the liquid level difference h meets the above conditions, the microchannel 180 allows gas to pass through while blocking liquid leakage.

[0177] To further prevent liquid leakage, the liquid level difference h can satisfy 0 < ρ*g*h ≤ 20%*Po; to further prevent liquid leakage, the liquid level difference h can satisfy 0 < ρ*g*h ≤ 10%*Po. For example, ρ*g*h ≤ 10%*Po, ρ*g*h ≤ 5%*Po, ρ*g*h ≤ 1%*Po.

[0178] Furthermore, the depth of the airflow channel 143 can be between 0.1 mm and 0.4 mm to facilitate the passage of gas while blocking the passage of liquid. For example, the depth of the airflow channel 143 can be 0.1 mm, 0.3 mm, 0.4 mm, etc. Furthermore, the depth of the airflow channel 143 can be between 0.25 mm and 0.34 mm to further facilitate gas passage and liquid blocking. For example, the depth of the airflow channel 143 can be 0.25 mm, 0.30 mm, 0.34 mm, etc.

[0179] In the preset direction, the third sealing groove 141 can be as follows: Figure 9 and Figure 10 The bottom wall of the third sealing groove 141 may be connected between the two groove sidewalls, which are arranged opposite to each other; or, the third sealing groove 141 may have a first groove sidewall, which may be used to support one side of the third seal 830.

[0180] When the third seal 830 has two groove sidewalls, in order to allow gas to flow in and out of the third sealing cavity 142, exemplarily, refer to Figure 9 In a predetermined direction, the height of the third seal 830 can be less than the height of the groove bottom wall. Thus, a channel communicating with the microchannel 180 can be formed between the third seal 830 and one of the groove sidewalls, and also between the third seal 830 and the other groove sidewall. In this way, gas entering the third sealing cavity 142 can... Figure 8 The arrow shown indicates that the airflow exits the third sealing cavity 142 after circling the third seal 830 at least half a turn. Furthermore, the airflow groove 143 can be as follows: Figure 11 As shown, it penetrates the bottom wall of the groove along a predetermined direction.

[0181] Another example, see reference Figure 10 Both inner sidewalls can be provided with guide grooves 144, which can have openings facing the third sealing cavity 142, and a channel for gas flow can be formed between the guide grooves 144 and the third sealing element 830, the channel communicating with the microchannel 180. Gas entering the third sealing cavity 142 passes through the channel and the microchannel 180... Figure 10 The arrow shown indicates that the flow exits the third sealing cavity 142 after circling the third seal 830 at least half a circumference. Furthermore, the guide channel 144 may penetrate the sidewall of the channel in a direction perpendicular to the bottom wall of the channel.

[0182] Similarly, when the third seal 830 has a groove sidewall, the gas inflow and outflow in the third sealing cavity 142 can be achieved by reducing the height of the third seal 830 or by setting a guide groove 144 on the groove sidewall.

[0183] Optional, see reference Figure 11The circumferential length of the airflow groove 143 is shorter than the circumferential length of the sealing groove. There may be one or more airflow grooves 143. When there are multiple airflow grooves 143, the multiple airflow grooves 143 may be arranged at intervals.

[0184] Optionally, the cover 140 can be detachably connected to the wall shell 130 so that when the liquid storage chamber 120 needs to be drained, the cover 140 can be removed from the wall shell 130 to achieve the purpose of rapid drainage.

[0185] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this disclosure is defined by the appended claims.

Claims

1. An oral hygiene device, characterized in that, include: A housing (100) is provided with a cleaning attachment (2000) at one end. The housing (100) is defined by a partition (600) to form a power chamber (110) and a liquid storage chamber (120). The power assembly includes a motor and a pump mechanism (300), the motor being fixedly disposed in the power chamber (110) and configured to drive the cleaning attachment (2000) via an output shaft (210), and the output shaft (210) of the motor having a through first channel (211), the pump mechanism (300) conveying liquid in the reservoir (120) to the first channel (211) via a coupling (400). The motor also includes: The rotor assembly (230) is fixedly disposed on the output shaft (210) and has a first winding mounting rod and a second winding mounting rod extending in opposite directions along the radial direction of the output shaft (210), the first winding mounting rod and the second winding mounting rod being configured to mount a winding (232). A stator assembly (240) is disposed around the rotor assembly (230); Two sets of magnets are disposed on the stator assembly (240) and respectively corresponding to the two winding mounting rods (231), and each set of magnets includes two magnets (250) with opposite magnetic properties. In at least one plane perpendicular to the rotation axis of the output shaft (210), with the intersection of the rotation axis and the plane as the center, the central angle α of the center lines of the two magnets (250) in the same group ranges from 40° to 50°.

2. The oral cleaning device according to claim 1, characterized in that, In at least one plane perpendicular to the axis of rotation of the output shaft (210), the included angle β between adjacent sides of two magnets (250) in the same group ranges from 35° to 45°.

3. The oral cleaning device according to claim 2, characterized in that, The single-sided swing angle of the rotor assembly (230) ranges from 5° to 15°.

4. The oral cleaning device according to claim 3, characterized in that, In at least one plane perpendicular to the axis of rotation of the output shaft (210), the rotor assembly (230) includes a circular circumferential portion (233) fixed to the output shaft (210), the winding mounting rod (231) includes a rod portion (2311) extending radially from the circular circumferential portion (233) toward the stator assembly (240), and two stops (2312) extending circumferentially in opposite directions from the rod portion (2311), the winding (232) being wound around the rod portion (2311).

5. The oral cleaning device according to claim 4, characterized in that, When the motor is in the equilibrium position, the two magnets (250) of the same group are symmetrically arranged with respect to the rod portion (2311) of the corresponding winding mounting rod (231), and the two magnets (250) of the same group overlap with the projection portion of the winding mounting rod (231) which is projected radially with the point of the rotation axis as the projection center.

6. The oral cleaning device according to claim 4, characterized in that, After the winding (232) is energized, under the action of magnetic force, the rotor assembly (230) swings around the output shaft (210) relative to the stator assembly (240) within the swing range. The stator assembly (240) facing the rotor assembly (230) is an annular surface, and the winding mounting rod (231) facing the stator assembly (240) is an arc surface. The radial air gap between the two arc surfaces is 0.1 mm to 0.2 mm.

7. The oral cleaning device according to claim 4, characterized in that, The winding mounting rod (231) facing the stator assembly (240) has an arc surface, and a groove (241) extending along the rotation axis is provided on the arc surface. When in the equilibrium position, the groove (241) is located between the two magnets (250) in the same group.

8. The oral cleaning device according to claim 4, characterized in that, The motor also includes an insulating layer (260) disposed between the winding (232) and the winding mounting rod (231) of the rotor assembly (230).

9. The oral cleaning device according to claim 8, characterized in that, The stator assembly (240) also includes a housing and a magnet holder (242) adapted to the shape of the housing, and the magnet (250) is fixedly disposed in the magnet holder (242); In at least one plane perpendicular to the rotation axis of the output shaft (210), the housing has a swing space that provides the rotor assembly (230) with a swing space about the output shaft (210) relative to the magnet (250), the swing space being formed by two arc segments and two straight segments, the two arc segments being concentric with the rotation axis of the output shaft (210), and the two straight segments being parallel to the extension direction of the winding mounting rod (231) located at the equilibrium position.

10. The oral cleaning device according to claim 3, characterized in that, In at least one plane perpendicular to the rotation axis of the output shaft (210), the cross-sectional shape of the magnet (250) is arc-shaped. The magnet (250) includes an outer arc segment and an inner arc segment distributed radially, and two side edges connecting the corresponding ends of the outer arc segment and the inner arc segment respectively. The central angles of the outer arc segment and the inner arc segment are the same.

11. The oral cleaning device according to claim 1, characterized in that, When the output shaft (210) is driven by a torque component along the circumferential direction of the rotation axis, the output shaft (210) rotates to a first preset position in the direction of the torque component. Subsequently, when driven by a torque component in the opposite direction, the output shaft (210) rotates to a second preset position in the opposite direction.

12. The oral cleaning device according to any one of claims 1-11, characterized in that, The planar projections of the power chamber (110) and the liquid storage chamber (120) along the rotation axis of the output shaft (210) at least partially overlap or do not overlap.

13. The oral cleaning device according to claim 12, characterized in that, The power chamber (110) is also equipped with a power source (710), which is located on the side of the pump mechanism (300) away from the motor, and the motor is located on the side of the pump mechanism (300) close to the cleaning accessory (2000).

14. The oral cleaning device according to claim 13, characterized in that, The connector (400) has a second channel (410) and a third channel (420), the second channel (410) connecting the outlet end (320) of the pump mechanism (300) and the first channel (211), and the third channel (420) connecting the inlet end (310) of the pump mechanism (300) and the storage chamber (120).

15. The oral cleaning device according to claim 14, characterized in that, The separator (600) is provided with a connecting hole (680) to connect the third channel (420) with the liquid storage chamber (120).

16. The oral cleaning device according to claim 15, characterized in that, The separator (600) also has a fourth channel for liquid flow, the fourth channel connecting the connecting hole (680) to the side of the liquid storage chamber (120) away from the pump mechanism (300).

17. The oral cleaning device according to claim 16, characterized in that, The partition (600) avoids the power source (710) along the rotation axis of the output shaft (210) to form a clearance chamber (610) accommodating at least a portion of the power source (710); or, The partition (600) avoids the power source (710) along the rotation axis of the output shaft (210) and forms an avoidance chamber (610) with the inner wall of the housing (100) to accommodate at least a portion of the power source (710).

18. The oral cleaning device according to claim 17, characterized in that, The separator (600) is sealed to the inner wall of the housing (100).

19. The oral cleaning device according to claim 18, characterized in that, The oral cleaning device also includes a fixing member (500), which is fixed to the inner wall of the housing (100) and is used to install the power end (330) of the motor and the pump mechanism (300). The valve portion of the outlet end (320) of the pump mechanism (300) is integrated into the fixing member (500), and the end cap portion of the outlet end (320) is integrated into the connecting member (400); the power end (330), at least a portion of the connecting member (400) and at least a portion of the fixing member (500) are arranged sequentially along the outlet direction of the outlet end (320).

20. An oral hygiene device, characterized in that, The device includes a cleaning attachment (2000) and an oral cleaning device as described in any one of claims 1-19, wherein the cleaning attachment (2000) has an inner cavity (2200) and a nozzle (2300) communicating with the inner cavity (2200), the output shaft (210) of the motor of the oral cleaning device is connected to the cleaning attachment (2000) and drives the cleaning attachment (2000) to move, such that the single-sided swing angle of the cleaning attachment (2000) is in the range of 5° to 15°, and the first channel (211) of the output shaft (210) is communicating with the inner cavity (2200) of the cleaning attachment (2000), and the pump mechanism (300) outputs water flow impact through the nozzle (2300).

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