RU2810229C1 - Device for oral care - Google Patents

Abstract

FIELD: medical equipment.

SUBSTANCE: oral care device includes a handle part and a head part for care. The handle part is designed in such a way that it is suitable for holding by the hand. The handle part contains an acoustic motor and an outer shell. The acoustic motor contains a motor housing. The outer shell has an outer wall and the accommodating cavities surrounded by the outer wall. The accommodating cavities include a mounting cavity and a water storage cavity separated from each other, and the maintenance head portion has a brush head containing bristles. The acoustic motor also contains a power output shaft. The motor housing has an output axis extending in the output power transmission direction, the output power shaft is a columnar member extending along the output axis and penetrating the motor housing. The output power shaft is configured to interact with the motor housing and transmit the output power to the motor housing, and the output power shaft has an axial channel parallel to the output axis. The mounting cavity runs along the outlet axis; the output power shaft and the motor housing are installed in the mounting cavity, and at one near end, corresponding to the part with the maintenance head, there is the outer wall with a hole for installing the shaft through which it is possible to pass the output power shaft to ensure a mounting fit to the output power shaft. The maintenance head portion has a flushing rod parallel to the outlet axis and has a brush head located on the head of the flushing rod. The washing rod is mounted on the output shaft, the brush head also includes a spray head, the bristles extend in a direction at a predetermined angle to the output axis, the orientation of the spray head nozzle is the same as the orientation of the bristles, and the washing rod has a fluid channel configured with the possibility to ensure communication between the spray head and the axial channel. The axial channel in the direction of passage of the output axis has an inlet hole and an outlet hole. The inlet of the axial channel is configured to communicate with the water storage cavity, and the outlet of the axial channel is configured to communicate with the care head portion; and when using the oral care device, it is possible for the water in the water storage cavity to enter the axial channel through the inlet of the axial channel, flow from the first end of the motor body to the second end thereof through the axial channel, and then enter the head part for care from the outlet of the axial channel and spraying from the brush head of the part with the care head.

EFFECT: ensuring ease of control and increasing user comfort.

10 cl, 2 dwg

Description

TECHNICAL FIELD

[0001] The present invention relates to the field of oral cleaning, in particular to an oral care device.

BACKGROUND OF THE ART

[0002] The acoustic motor assembly apparatus includes a motor, an eccentric drive shaft, an output shaft operatively connected to the motor, and a power transmission unit, wherein the power transmission unit is mounted between the eccentric drive shaft and the output shaft. The power transmission unit converts the rotation of the eccentric drive shaft into an oscillating motion of the output shaft.

[0003] In the above solution, the eccentric rotation of the shaft rod at the front end of the motor is transmitted to the end of the hollow shaft rod in the middle through an eccentric mechanism that vibrates the shaft rod. The disadvantage of this solution is that the motor shaft rod is not concentric with the hollow shaft rod, resulting in excessive vibration. The principle of balancing is to use the principle of balancing weight, and in principle, the brush head can be balanced by rationally distributing the mass so that the centrifugal force in the horizontal direction and the centrifugal force in the vertical direction of the brush head are substantially balanced in the working process.

[0004] In addition, the prior art does not provide an oral care device capable of performing not only a teeth cleaning function but also a rinsing function. Even if an oral care device that is simultaneously capable of performing the functions of brushing teeth and rinsing the mouth exists, in addition to a motor providing kinetic energy for cleaning teeth, it is also necessary to install a motor providing kinetic energy for the rinsing liquid. To avoid interference between the motors and the rinse line, the rinse line must also be installed outside the motor that provides the kinetic energy for brushing the teeth. Thus, in addition to requiring additional conduit, the volume may also be further increased, causing the volume of the oral care device to become larger, holding more difficult, handling to be inconvenient, and comfort of use for the user to be reduced.

SUMMARY OF THE INVENTION

[0005] The main object of the present invention is to provide an oral care device in which a rinsing flow path is rationally provided, and to reduce the overall volume of the oral care device so that it is convenient for the user to operate it, as well as to improve the comfort provided by for the user while using the device.

[0006] To achieve the above object, according to one aspect of the present invention, there is provided an oral care device including a handle portion and a grooming head portion, wherein the handle portion is configured to be suitable for hand holding and includes :

[0007] an acoustic motor including a motor housing and a power output shaft, the motor housing having an output axis extending in a power transmission direction, the power output shaft being a columnar member extending along the output axis and penetrating the motor housing, the output shaft power is configured to interact with the motor housing and transmit output power to the motor housing, and the output power shaft has an axial channel parallel to the output axis; And

[0008] an outer shell having an outer wall and containing cavities surrounded by the outer wall, wherein the containing cavities include a mounting cavity and a water storage cavity that are separated from each other, and the direction in which the mounting cavity extends is consistent with the direction in which the output axis passes; the output power shaft and the motor housing are mounted in the mounting cavity, and at one end adjacent to the care head portion of the outer wall there is a shaft installation hole through which the output power shaft can be passed to ensure a mounting fit with the output power shaft;

[0009] wherein the care head portion has a wash rod parallel to the output axis and a brush head located on the head of the wash rod, the wash rod is mounted on the output shaft, the brush head has bristles and a spray head, the bristles extend into a direction that forms a predetermined opening angle with the outlet axis, the orientation of the spray head nozzle is the same as the orientation of the bristles, and the flushing rod has a fluid channel configured to allow communication of the spray head with the axial channel;

[0010] along the direction in which the output axis extends, the axial channel has an inlet hole and an outlet hole, the inlet hole of the axial channel is configured to communicate with the water storage cavity, and the outlet hole of the axial channel is configured to communicate with the part with care head; and during use of the oral care device, the water in the water storage cavity can enter the axial channel through the inlet of the axial channel, flow from the first end of the motor body to the second end thereof through the axial channel, then enter the head portion care from the outlet of the axial channel and is sprayed from the brush head of the part with the care head.

[0011] In addition, the Rockwell hardness HRC range of the power output shaft is 17-70, and the thickness of one side wall is 0.3-1 mm.

[0012] In addition, the cross-section of the axial channel is circular, the diameter of the axial channel is 2-5 mm, the power output shaft is cylindrical, and the diameter of the power output shaft is 3-6 mm.

[0013] In addition, in the section perpendicular to the output axis, the ratio of the cross-sectional area of the output power shaft to the cross-sectional area of the axial channel is in the range of 1.5-9, the thickness of one side wall of the output power shaft is 0.3-1 mm, and the internal The diameter of the axial channel is 0.5-3 mm.

[0014] In addition, the axial channel extends through the output shaft in the axial direction of the output power shaft, the inlet hole is located at one end away from the care head portion of the axial channel, and the outlet hole is located at the other end located adjacent to the care head portion. care head, axial channel.

[0015] In addition, the power output shaft has a one-piece structure.

[0016] In addition, the output power shaft has a segmented structure, and all segments of the output power shaft are rigidly connected to each other.

[0017] In addition, the output power shaft includes a first shaft portion, a second shaft portion, and a third shaft portion, which are connected in series, wherein the first shaft portion is configured to engage with the motor housing, the second shaft portion is configured to engage with the hole for installing the shaft, and the third part of the shaft is configured to interact with the part with the care head.

[0018] In addition, the diameter of the first shaft part is 3-3.5 mm, and its wall thickness is 0.5-0.75 mm; the diameter of the second part of the shaft is 4-6 mm, and the thickness of its wall is 1-2 mm; the diameter of the third part of the shaft is 3.5-6 mm, and the thickness of its wall is 0.75-2 mm; and the second shaft part is provided with a sealing groove, the depth of the sealing groove is 0.1-0.3 mm, the third shaft part is provided with a clamping positioning groove, and the depth of the clamping positioning groove is 0.3-0.5mm.

[0019] In addition, the oral care device further includes a fluid mechanism and a battery; wherein the fluid mechanism includes a fluid inlet configured to transmit incoming fluid to the fluid mechanism, and a fluid outlet configured to transmit incoming flow to the inlet of the axial channel, and the fluid mechanism the environment further includes a power apparatus configured to provide a driving force to create a fluid flow; and the battery is configured to provide power to the power apparatus and the acoustic motor, the battery being located at one end remote from the acoustic motor, the fluid mechanism, the acoustic motor, the fluid mechanism, and the battery being arranged in series along a direction parallel to the output axis .

[0020] When the technical solution of the present invention is applied to an oral care device, the output power shaft of the acoustic motor is a columnar member extending along the output axis and penetrating the motor housing, the power output shaft defining an axial channel parallel to the output axis. If the fluid pumped out from the fluid mechanism reaches the position of the acoustic motor, it is not necessary to place the tube outside the acoustic motor and can be directly connected to the output shaft of the acoustic motor so that the fluid outlet of the fluid mechanism communicates with an axial channel of the output power shaft, and the axial channel of the output power shaft can be used for output fluid. The structure of the acoustic motor can be used more fully and rationally, so that the design layout of the flushing flow path is more rational, the length of the fluid pipelines is reduced, the occupied space is reduced, the oral care device has a smaller overall volume and a smaller weight; the handle part can be made thinner, making it easier to hold, making it convenient for the user to operate, and increasing the comfort provided to the user while using the device.

BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings to the specification, which form a part of this application, are used to provide a better understanding of the present disclosure, and the schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and not to imply undue limitation of the present invention. On the attached drawings:

[0022] In FIG. 1 is a cross-sectional block diagram of an oral care apparatus according to an embodiment of the present invention.

[0023] In FIG. 2 is a block diagram of a locally enlarged sectional view of an oral care device in accordance with an embodiment of the present invention.

[0024] The above accompanying drawings include the following reference numbers:

[0025] 1. Handle part; 2. Part with care head; 3. Motor housing; 4. Power output shaft; 5. Outer shell; 6. Outer wall; 7. Mounting cavity; 8. Cavity for storing water; 9. Hole for installing the shaft; 10. Flushing rod; 11. Brush head; 12. Bristles; 13. Spray head; 14. Axial channel; 15. Fluid channel; 16. Inlet port; 17. Outlet; 18. First part of the shaft; 19. Second part of the shaft; 20. Third part of the shaft; 21. Sealing groove; 22. Positioning groove for clamping; 23. Fluid mechanism; 24. Battery; 25. Fluid inlet; and 26. A fluid outlet.

IMPLEMENTATION OF THE INVENTION

[0026] It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other in the absence of conflicts. The present invention will be described in detail below with reference to the accompanying drawings and in connection with the embodiments.

[0027] In the present disclosure with reference to FIG. 1 and 2, a device for oral care is proposed, including a handle part 1 and a part 2 with a care head. The handle part 1 is configured to be suitable for holding by the hand and includes an acoustic motor and an outer shell 5, the acoustic motor includes a motor housing 3 and a power output shaft 4, and the motor housing 3 has an output axis extending into direction of power transmission. The output power shaft 4 is a columnar member extending along the output axis and penetrating the motor housing 3, wherein the output power shaft 4 is configured to interact with the motor housing 3 and transmit the output power to the motor housing 3, and the output power shaft 4 has an axial channel 14 , parallel to the output axis.

[0028] The outer shell 5 has an outer wall 6 and containment cavities surrounded by the outer wall 6, the containment cavities including a mounting cavity 7 and a water storage cavity 8, which are separated from each other, and the direction in which the mounting cavity 7 extends is consistent with the direction in which the output axis passes. The output power shaft 4 and the motor housing 3 are installed in the mounting cavity 7, and at one end, located adjacent to the maintenance head part 2, of the outer wall 6 there is a shaft installation hole 9 through which the output power shaft 4 can be passed to ensure mounting fit to output power shaft 4.

[0029] The maintenance head part 2 has a flushing rod 10 parallel to the output axis and a brush head 11 located on the head of the flushing rod 10, wherein the flushing rod 10 is mounted on the power output shaft 4, the brush head 11 includes bristles 12 and the spray head 13, the bristles 12 extend in a direction that forms a predetermined opening angle with the output axis, the orientation of the nozzle of the spray head 13 is the same as the orientation of the bristles 12, and the flushing rod 10 has a fluid passage 15 configured with the possibility of ensuring communication between the spray head 13 and the axial channel 14.

[0030] Along the direction in which the output axis extends, the axial channel 14 has an inlet 16 and an outlet 17, the inlet 16 of the axial channel 14 being configured to communicate with the water storage cavity 8, and the outlet 17 of the axial channel 14 configured to provide communication with part 2 with the care head; and during use of the oral care device, the water located in the water storage cavity 8 can enter the axial channel 14 through the inlet 16 of the axial channel 14, flows from the first end of the motor housing 3 to the second end thereof through the axial channel 14, then enters the care head part 2 from the outlet 17 of the axial channel 14 and is sprayed from the brush head 11 of the care head part 2.

[0031] In the oral care device, the acoustic motor power output shaft 4 is a columnar member extending along the output axis and penetrating the motor body 3, the power output shaft 4 defining an axial channel 14 parallel to the output axis. If the fluid pumped out from the fluid mechanism 23 reaches the position of the acoustic motor, there is no need to place the tube outside the acoustic motor, and it can be directly connected to the output shaft 4 of the acoustic motor so that the fluid outlet of the fluid mechanism 23 the medium communicated with the axial channel 14 of the output power shaft 4, and the axial channel 14 of the output power shaft 4 can be used to transmit fluid, so that the fluid flows through the output power shaft 4 inside the acoustic motor; also, no other changes in the product design are required, additional space is not required, and the design of the acoustic motor can be used more fully and rationally, so that the design layout of the flushing flow path is more rational, the length of the fluid pipelines is reduced, the space occupied is reduced, the maintenance device behind the oral cavity has a smaller total volume and less mass; the handle part can be made thinner, making it easier to hold, making it convenient for the user to operate, and increasing the comfort provided to the user while using the device.

[0032] In one embodiment, the hardness range of the power output shaft 4 is (Rockwell hardness HRC): 17-70, and the thickness of one side wall thereof is 0.3-1 mm. Practice has shown that among the different hardness values of materials, there is an approximately corresponding relationship between the hardness value and the strength value, and the hardness value is determined by the resistance to initial plastic deformation and the resistance to continuous plastic deformation, and the higher the strength of the materials, the higher the resistance to plastic deformation and the higher the hardness value. As a rule, the higher the hardness of the materials, the higher the wear resistance and the higher the brittleness. Therefore, in order to simultaneously ensure the hardness and toughness of the power output shaft 4, it is necessary to limit the hardness of the power output shaft 4 accordingly. Setting the hardness of the output power shaft 4 in the above range can ensure that the hardness of the output power shaft 4 meets the power transmission requirements of the acoustic motor, and the problem of plastic deformation of the output power shaft 4 due to insufficient hardness can be effectively avoided, and at the same time, the problem is that too high hardness causes too high brittleness, which generally leads to fracture, so that after the output power shaft 4 is provided with the axial channel 14, it can still have good hardness and toughness , fluid transmission can be ensured and power transmission can be ensured at the same time, and a certain service life and operating stability of the acoustic motor can be ensured.

[0033] Within the above hardness range, the wall thickness of the output shaft 4 is optimal, the wall thickness of the output power shaft 4 can be smaller, while ensuring that the structural strength of the output power shaft 4 meets the service life requirements of the acoustic motor, thereby reducing material consumption, reducing material cost, the total weight of the handle part 1 is reduced, and the total weight of the oral care device becomes more suitable for the user.

[0034] The power output shaft 4 may be made of stainless steel, particularly 303 steel or 304 steel, or other types of metallic or non-metallic materials if the above hardness requirements are met.

[0035] In one embodiment, the cross-section of the axial channel 14 is circular, the diameter of the axial channel 14 is 2-5 mm, the power output shaft 4 is cylindrical, and the diameter of the power output shaft 4 is 3-6 mm. In one embodiment, the diameter of the axial channel 14 is from 2 mm to 5 mm, and the diameter of the power output shaft 4 is from 3 mm to 6 mm, which can not only ensure that the fluid located in the axial channel 14 smoothly passes through the axial channel 14, providing sufficient flushing water in the maintenance head part 2, but also avoid the problem that the diameter of the axial channel 14 is too large, resulting in an increase in the basic required wall thickness of the output power shaft 4 and an increase in the overall diameter of the acoustic engine, and avoids increasing the cross-sectional area of the handle part 1, so that the handle part 1 is always easy to hold.

[0036] In one embodiment, the surface of the inner wall of the axial channel 14 of the power output shaft 4 is subjected to processing, which may be fine drawing or polishing, whereby the surface accuracy of the inner wall of the axial channel 14 can be improved, the resistance to fluid flow can be reduced, and the consumption can be reduced. energy when transferring the fluid and increasing the efficiency of transferring the fluid.

[0037] In one embodiment, in a section perpendicular to the output axis, the ratio of the cross-sectional area of the power output shaft 4 to the cross-sectional area of the axial channel 14 is in the range of 1.5-9, the thickness of the one-sided wall of the power output shaft 4 is 0.3-1 mm , and the inner diameter of the axial channel 14 is 0.5-3 mm, due to which good matching can be achieved between the wall thickness of the output power shaft 4, the inner diameter of the axial channel 14 and the total cross-sectional area of the output power shaft 4, which can not only ensure resistance to the flow of fluid in the axial channel 14, but also makes it possible to ensure that the wall thickness of the power output shaft 4 meets the power transmission requirements for the power output shaft 4, and makes it possible to further ensure that the diameter of the power output shaft 4 is not too large, and thus , avoid the problem that the diameter of the acoustic motor is too large, which causes the cross-sectional area of the handle part 1 to be too large.

[0038] In one embodiment, the axial channel 14 extends through the power output shaft 4 in the axial direction of the power output shaft 4, the inlet 16 is located at one end remote from the care head portion 2 of the axial channel 14, and the outlet 17 is located at the other end, adjacent to the care head portion 2, of the axial channel 14. In one embodiment, the axial channel 14 extends through the power output shaft 4 in the axial direction. On the one hand, it ensures the convenience of processing the axial channel 14 and reduces the complexity of processing the axial channel 14 on the output power shaft 4. On the other hand, it may be convenient to realize communication and matching with the fluid outlet 26 of the fluid mechanism 23, and the complexity of matching will be reduced.

[0039] In one embodiment, the power output shaft 4 has a one-piece structure, the structural strength, integrity and structural continuity of the power output shaft 4 can be improved, the overall sealing performance of the power output shaft 4 is ensured, and at the same time the processing procedures are reduced, and the general structural stability.

[0040] In one embodiment, the power output shaft 4 has a segmented structure, and all segments of the power output shaft are rigidly connected to each other. Since the output power shaft 4 has a thin-walled elongated tubular structure and grooves must be formed in the peripheral wall as a result of processing, if the output power shaft 4 is machined as a whole, the processing labor intensity may increase, and deformation generally occurs during the processing process, resulting in to a higher marriage rate. The power output shaft 4 can be segmented according to functions to form a segment structure, each segment meeting different functional requirements. Thus, each segment of the power output shaft 4 has a shorter length and the hole to be formed is also smaller, whereby the processing complexity can be greatly reduced and processing stability can be effectively ensured. After processing of each segment is completed, all segments of the power output shaft 4 can be firmly connected to each other by welding or gluing, etc. to form an integral fixed structure.

[0041] In one embodiment, the power output shaft 4 includes a first shaft portion 18, a second shaft portion 19, and a third shaft portion 20 that are connected in series, wherein the first shaft portion 18 is configured to interact with the motor housing 3, the second portion 19 of the shaft is configured to interact with the hole 9 for installing the shaft, and the third part 20 of the shaft is configured to interact with the part 2 with the maintenance head. In this embodiment, the power output shaft 4 is divided into three parts according to different matching structures, and the three parts are rigidly connected after processing, thereby facilitating processing and improving processing efficiency.

[0042] In one embodiment, the diameter of the first shaft portion 18 is 3-3.5 mm, and its wall thickness is 0.5-0.75 mm; the diameter of the second part 19 of the shaft is 4-6 mm, and the thickness of its wall is 1-2 mm; the diameter of the third part 20 of the shaft is 3.5-6 mm, and the thickness of its wall is 0.75-2 mm; and the second shaft part 19 is provided with a sealing groove 21, the depth of the sealing groove 21 is 0.1-0.3 mm, the third shaft part 20 is provided with a clamping positioning groove 22, and the depth of the clamping positioning groove 22 is 0.3-0.5 mm.

[0043] In this embodiment, the first shaft portion 18 is located in the motor housing 3 and is mainly used for rotatably fitting to the motor housing 3 as well as for transmitting fluid. The periphery of the first shaft portion 18 has a smooth structure, and there is no need to process the groove structure. Therefore, it can be made with a smaller wall thickness, which can meet the requirements of the motor housing 3, so that the wall thickness of the segment is minimal. The second shaft portion 19 must be installed with a mounting and sealing fit to the outer wall 6, so it is necessary to form a sealing groove 21 in the peripheral wall of the second shaft portion 19, however, the creation of the sealing groove 21 may affect the structural strength of the second shaft portion 19. Therefore, during the structural design of the second shaft part 19, when calculating the wall thickness, it is necessary to simultaneously take into account the influence of the sealing groove 21, while the wall thickness to be calculated must meet the requirements for the minimum wall thickness, and at the same time increasing the influence of the depth of the sealing groove 21 such such that the creation of the sealing groove 21 does not lead to a situation where the second shaft portion 19 may not meet the structural design requirements of the output power shaft 4. Consequently, the diameter and wall thickness of the second shaft part 19 are larger than those of the first shaft part 18. The third shaft part 20 must meet the requirements of mounting fit to the care head part 2 and ensure the spring clamping position of the care head part 2, so the positioning groove 22 for the clamp must be formed in the third shaft part 20, and the design influence must also be taken into account structure of the positioning groove 22 for clamping onto the third shaft part 20. Therefore, the diameter of the third shaft part 20 must also be larger than the diameter of the first shaft part 18. The diameters of the second shaft portion 19 and the third shaft portion 20 may be the same or different as long as the strength required for each design is achieved.

[0044] In one embodiment, the oral care device further includes a fluid mechanism 23 and a battery 24; wherein the fluid mechanism 23 includes a fluid inlet 25 configured to transmit incoming fluid to the fluid mechanism 23, and a fluid outlet 26 configured to transmit incoming flow to the axial channel inlet 16 14, and the fluid mechanism 23 further includes a power apparatus configured to provide a driving force to create a fluid flow; and the accumulator 24 is configured to provide energy for the power apparatus and the acoustic motor, the accumulator 24 being located at one end, remote from the acoustic motor, the fluid mechanism 23, the acoustic motor, the fluid mechanism 23 and the accumulator 24 being arranged in series along direction parallel to the output axis.

[0045] In this embodiment, after flowing out of the water storage cavity 8 under the driving action of the power apparatus of the fluid mechanism 23, the fluid enters the fluid mechanism 23 through the fluid inlet 25 of the fluid mechanism 23, then flows out from the fluid outlet 26 of the fluid mechanism 23 and is transmitted to the power output shaft 4. The fluid enters the axial channel 14 from the inlet 16 of the axial channel 14 of the output shaft 4, then flows from the axial channel 14 to the other end of the motor housing 3, flows out from the outlet 17 of the axial channel 14, entering the maintenance head part 2, and finally sprayed from the spray head 13 of the part 2 with the care head to rinse the mouth. In addition, the acoustic motor can output power to the grooming head part 2 through the power output shaft 4, and transmit power to the brush head 11 through the washing rod 10 of the grooming head part 2, so that the brush head 11 can perform power-driven cleaning. acoustic motor and the oral cavity is cleaned through the use of bristles 12 of the brush head 11.

[0046] It should be noted that herein, terms are used only to describe specific embodiments and are not intended to limit the exemplary embodiments of this application. As used herein, the singular form also includes the plural form unless the context clearly indicates otherwise. In addition, it should also be understood that as used herein, the terms “comprise” and/or “include” indicate the presence of features, steps, operations, devices, components and/or combinations thereof.

[0047] It should be noted that the terms “first”, “second”, etc. in the present description, the claims and the above drawings attached to this application are used to distinguish like objects and do not indicate a specific order or sequence. It should be understood that the order of the data used may thus, under appropriate circumstances, be changed so that embodiments of the present application described herein may be implemented in a manner different from that illustrated or described herein.

[0048] The above descriptions are only preferred embodiments of the present invention and are not intended to be limiting. Various modifications and variations of the present invention may be suggested by those skilled in the art. Any modifications, equivalent replacements, improvements, etc. developed using the ideas and principles of the present invention shall be included within the scope of protection of the present invention.

Claims (11)

1. An oral care device, comprising: a handle part (1) and a part (2) with a care head, wherein the handle part (1) is designed so that it is suitable for holding by the hand, and the handle part (1) contains: an acoustic motor and an outer shell (5), wherein the acoustic motor contains a motor housing (3), the outer shell (5) has an outer wall (6) and accommodating cavities surrounded by an outer wall (6), and the accommodating cavities contain a mounting cavity (7) and a cavity (8) for storing water, which are separated from each other, and the part (2) with the care head has a brush head (11) containing bristles (12), characterized in that the acoustic motor also contains an output shaft (4) power, wherein the motor housing (3) has an output axis extending in the output power transmission direction, the power output shaft (4) is a columnar member extending along the output axis and penetrating the motor housing (3), wherein the power output shaft (4) configured to interact with the motor housing (3) and transmit output power to the motor housing (3), and the output power shaft (4) has an axial channel (14) parallel to the output axis; and the mounting cavity (7) runs along the outlet axis; The output power shaft (4) and the motor housing (3) are installed in the mounting cavity (7), and at one proximal end corresponding to the maintenance head part (2) of the outer wall (6) there is a hole (9) for installing the shaft, through which it is possible to pass the output power shaft (4), ensuring mounting fit to the output power shaft (4); wherein the part (2) with the care head has a flushing rod (10) parallel to the output axis, and has a brush head (11) located on the head of the washing rod (10), while the washing rod (10) is installed on the shaft (4) power output, the brush head (11) also includes a spray head (13), the bristles (12) extend in a direction at a predetermined angle to the output axis, the orientation of the nozzle of the spray head (13) is the same as the orientation of the bristles (12) , and the flushing rod (10) has a channel (15) for fluid, configured to provide communication between the spray head (13) and the axial channel (14); the axial channel (14) in the direction of passage of the output axis has an inlet hole (16) and an outlet hole (17), and the inlet hole (16) of the axial channel (14) is configured to communicate with the cavity (8) for storing water, and the outlet the hole (17) of the axial channel (14) is configured to communicate with the part (2) with the care head; and when using the oral care device, water contained in the water storage cavity (8) is allowed to enter the axial channel (14) through the inlet (16) of the axial channel (14) and flow from the first end of the body (3) motor to its second end through the axial channel (14), then entering the part (2) with the care head from the outlet (17) of the axial channel (14) and spraying from the brush head (11) of the part (2) with the care head . 2. The oral care device according to claim 1, in which the Rockwell hardness HRC range of the output power shaft (4) is 17-70, and the thickness of one side wall is 0.3-1 mm. 3. The oral care device according to claim 1, wherein the cross-section of the axial channel (14) is circular, the diameter of the axial channel (14) is 2-5 mm, the power output shaft (4) is cylindrical, and the diameter of the shaft ( 4) Output power is 3-6mm. 4. The oral care device according to claim 1, in which in the section perpendicular to the output axis, the thickness of one side wall of the output power shaft (4) is 0.3-1 mm, and the internal diameter of the axial channel (14) is 0 .5-3 mm. 5. The oral care device according to claim 1, wherein the axial passage (14) extends through the power output shaft (4) in the axial direction of the power output shaft (4), the inlet (16) is located at one end distant from the care head portion (2) of the axial channel (14), and the outlet (17) is located at the other proximal end of the axial channel (14) corresponding to the care head portion (2). 6. The oral care device according to claim 1, wherein the power output shaft (4) has a one-piece structure. 7. The oral care device according to claim 1, wherein the power output shaft (4) has a segmented structure, and all segments of the power output shaft (4) are fixedly connected to each other. 8. An oral care device according to claim 6 or 7, wherein the power output shaft (4) comprises a first shaft part (18), a second shaft part (19) and a third shaft part (20), which are connected in series, with In this case, the first part (18) of the shaft is made to interact with the engine housing (3), the second part (19) of the shaft is made to interact with the hole (9) for installing the shaft, and the third part (20) of the shaft is made to interact with the part (2) with care head. 9. The oral care device according to claim 8, in which the diameter of the first part (18) of the shaft is 3-3.5 mm, and the thickness of its wall is 0.5-0.75 mm; the diameter of the second part (19) of the shaft is 4-6 mm, and the thickness of its wall is 1-2 mm; the diameter of the third part (20) of the shaft is 3.5-6 mm, and the thickness of its wall is 0.75-2 mm; and the second part (19) of the shaft is provided with a sealing groove (21), the depth of the sealing groove (21) is 0.1-0.3 mm, the third part (20) of the shaft is provided with a positioning groove (22) for clamping, and the depth of the positioning groove ( 22) for clamping is 0.3-0.5 mm. 10. Device for oral care according to any one of paragraphs. 1-7, further comprising: a fluid mechanism (23) and an accumulator (24), wherein the fluid mechanism (23) comprises a fluid inlet (25) configured to transfer incoming fluid to the mechanism (23) for a fluid medium, and an outlet hole (26) for a fluid medium, configured to transfer the incoming flow to the inlet hole (16) of the axial channel (14), and a mechanism (23) for a fluid medium further comprises a power apparatus configured to provide a driving force effective force to create a fluid flow; and the accumulator (24) is configured to provide energy for the power apparatus and the acoustic motor, the accumulator (24) being located at one end remote from the acoustic motor, the mechanism (23) for the fluid, the acoustic motor, the mechanism (23) for fluid and accumulator (24) are arranged in series along a direction parallel to the output axis.