A dental flosser with a rotatable nozzle

Abstract

This utility model discloses a water flosser with a rotatable nozzle, including a water flosser housing. A detachable water tank is installed on one side of the housing, and the tank contains a battery, a water pump assembly, and a PCB board. A gearbox driven by a geared motor enables the nozzle to rotate along the axis of the geared motor. The rotating head bracket can automatically rotate around the housing from 0° to 180° to open and close, facilitating easy opening and storage and cleaning of various parts of the oral cavity. The water tank is magnetically connected via a magnetic assembly, making installation and disassembly convenient. This water flosser solves the problem of fixed nozzles in traditional water flossers, providing excellent cleaning results, a compact structure, and ease of use.

Description

Technical Field

[0001] This utility model relates to the field of oral hygiene equipment technology, specifically to a water flosser with a rotatable nozzle. Background Technology

[0002] With increasing awareness of oral health, water flossers have gradually become an essential oral care product for families. Currently, there are many types of water flossers on the market, but most of them use a fixed nozzle setting, meaning the spray direction remains unchanged. In actual use, due to the complex internal structure of the oral cavity and the certain curvature and angle of the teeth, users need to constantly adjust their overall grip and angle when cleaning the inner surfaces of teeth and back teeth with a fixed-direction nozzle. This is inconvenient, increases the difficulty of use, and may also lead to incomplete cleaning due to improper posture, failing to achieve the desired cleaning effect.

[0003] While some oral irrigators have attempted to improve the nozzle structure, such as adopting a design that allows for the pluggable replacement of nozzles with different angles, this design requires users to frequently change nozzles during cleaning, making operation cumbersome. Furthermore, the inclusion of multiple nozzles increases the product's operating cost and storage difficulty. A few oral irrigators use a manually adjustable nozzle angle structure; however, manual adjustment makes it difficult to precisely control the nozzle's rotation angle, and during cleaning, one hand must hold the main body of the oral irrigator while the other adjusts the nozzle, resulting in a poor user experience and failing to meet users' needs for convenient and efficient oral cleaning.

[0004] Furthermore, existing oral irrigators often suffer from inconvenient installation and disassembly, as well as poor sealing, in their connection structure between the water tank and the housing. Some products use threaded connections, which are prone to thread wear after repeated disassembly, leading to loose connections and leaks. Others use snap-fit ​​connections, requiring precise alignment and pressing during installation, and external prying is needed for disassembly, making the process cumbersome and inconvenient for users. Additionally, the overall structural layout of existing oral irrigators is not optimal, with insufficient stability in the connections between some components, affecting the lifespan and safety of the oral irrigator.

[0005] In conclusion, current oral irrigators on the market still have room for improvement in terms of nozzle adjustment convenience and water tank connection stability. There is a need for an oral irrigator that can automatically rotate and adjust the nozzle, easily disassemble and assemble the water tank, and has a stable structure to meet users' growing demand for high-quality oral hygiene. Utility Model Content

[0006] The purpose of this invention is to provide a water flosser with a rotatable nozzle to solve the problem that existing water flossers with fixed nozzles cannot effectively clean various parts of the oral cavity, especially hidden areas. At the same time, it optimizes the installation and disassembly method of the water tank and the layout of internal components to improve the overall performance and ease of use of the water flosser.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A rotatable nozzle oral irrigator includes an oral irrigator housing. A removable water tank is mounted on one side of the housing, storing water for cleaning and providing a water source for the oral irrigator's cleaning function. A battery and a water pump assembly are installed inside the housing. The battery provides power to the electrical components of the entire oral irrigator, while the water pump assembly draws and pressurizes the water in the tank to create a high-pressure water flow for oral cleaning.

[0009] A PCB board is mounted on one side of the water pump assembly. This PCB board serves as the control core of the water flosser, receiving and processing user commands to control the operating status of components such as the water pump assembly and geared motor. This enables functions such as switching between different operating modes and controlling nozzle rotation. A gearbox bracket is located at the other end of the water pump assembly. This bracket is fixedly connected to the water flosser housing, ensuring stability during operation and preventing positional shifts due to vibration or other factors.

[0010] A geared motor is fixedly mounted on one side of the gearbox bracket, serving as the drive source to power the nozzle's rotation. The output shaft of the geared motor passes through the gearbox bracket and is fitted with a pinion. A large gear meshes with one side of the pinion. This meshing of the pinion and large gear reduces the speed of the geared motor's output shaft, increases torque, and ensures smooth and powerful nozzle rotation. A rotating head bracket is fixedly connected to the other side of the large gear. A nozzle rotating head is fixedly connected to the outside of the rotating head bracket, with a nozzle connected to one end. The gearbox is driven by the geared motor, causing the nozzle and nozzle rotating head to rotate along the gearbox bracket's axis, thereby adjusting the nozzle's spray direction.

[0011] Furthermore, the rotating head support can rotate around the water flosser housing within a range of 0°-180°, causing the nozzle and nozzle rotating head to swing synchronously within the range of 0°-180°. This angle range can fully cover all cleaning areas of the oral cavity, whether it is the inner or outer side of the teeth, the occlusal surface, or hard-to-clean areas such as the back teeth. Users do not need to frequently adjust the grip posture of the water flosser body. They can achieve precise cleaning of different parts of the oral cavity simply by controlling the rotation of the nozzle.

[0012] The water flosser's outer shell not only protects the internal components but also enhances its aesthetics and provides a comfortable grip. Inside the outer shell is a waterproof back cover, effectively preventing water or other liquids from entering and protecting internal electrical components from damage, thus improving its waterproof performance and safety. A soft-rubber inner frame is integrally molded with the back cover, enhancing the seal and further improving waterproofing. The inner frame also acts as a cushioning element, reducing the impact on internal components. Below the back cover is a bottom cover with a charging port for connecting to an external power source to charge the battery, ensuring continuous and normal operation.

[0013] A button panel is installed on the side of the water flosser housing near the nozzle. The button panel has a push-button switch, allowing the user to send operation commands to the PCB board by pressing the button switch, thus controlling functions such as turning the water flosser on and off, switching operating modes, and controlling nozzle rotation. A through-hole is provided above the button panel, through which the nozzle rotating head passes. This through-hole provides sufficient space for the nozzle rotating head to rotate while also limiting and guiding its movement, ensuring stability during rotation and preventing deviation or wobbling.

[0014] A magnetic assembly is installed on one side of the waterproof cover. This assembly includes a first magnet and a second magnet that is magnetically attracted to it. The first magnet is installed on one side of the waterproof cover, and the second magnet is installed on one side of the water tank. The first and second magnets attract each other, achieving a detachable connection between the water tank and the water flosser housing through magnetic attraction. This magnetic connection method is simple to operate. Users only need to bring the water tank close to the corresponding position on the water flosser housing, and the water tank can be installed under the attraction of the magnets. For disassembly, simply pull the water tank gently to separate the first and second magnets. Furthermore, there are at least two of both the first and second magnets, arranged in a one-to-one correspondence. The multiple magnets enhance the connection stability between the water tank and the water flosser housing, preventing the water tank from loosening or falling off during use, while also ensuring a tight seal between the water tank and the water flosser housing to prevent leakage.

[0015] One side of the gearbox bracket has an annular cavity. This cavity provides installation and operating space for the gears inside the gearbox, ensuring that the gears do not interfere with other components during transmission. It also protects the gears from dust and impurities entering the meshing areas, preventing them from affecting transmission efficiency and gear lifespan. The other side of the gearbox bracket is fixedly equipped with a water pump adapter pipe. The lower side of the gearbox bracket is fixedly connected to the water pump assembly outlet. The water pump assembly draws and pressurizes water from the tank, then delivers it to the gearbox bracket through its outlet. From there, it is delivered via the water pump adapter pipe to the nozzle rotating head and nozzle, ultimately forming a high-pressure water jet that sprays out from the nozzle for oral cleaning. The connection between the water pump adapter pipe and the gearbox bracket and nozzle rotating head has excellent sealing properties, effectively preventing water leakage during delivery and ensuring the cleaning effect of the oral irrigator.

[0016] The water tank is equipped with a suction pipe inside. One end of the suction pipe is connected to a suction head, and the other end extends to the bottom of the water tank. The suction head penetrates the water tank wall and connects to the inlet of the water pump assembly. This design, with the suction pipe extending to the bottom of the water tank, ensures that all remaining water can be drawn from the tank, preventing unusable water residue at the bottom and improving the utilization rate of the water resources. The connection between the suction head and the water tank wall has good sealing properties, preventing water leakage from the connection point. Simultaneously, the stable connection between the suction head and the water pump assembly inlet ensures that the water pump assembly can smoothly draw water from the water tank. Compared with existing technologies, the beneficial effects of this invention are as follows:

[0017] 1. Automatic nozzle rotation adjustment: This utility model uses a gearbox driven by a reduction motor to drive the nozzle and nozzle rotating head to rotate and swing within the range of 0°-180° along the axis of the gearbox bracket. Users do not need to frequently adjust the grip posture of the water flosser body to achieve precise cleaning of different parts of the oral cavity, which greatly improves the convenience of using the water flosser and the cleaning coverage, and enhances the oral cleaning effect.

[0018] 2. The water tank is easy to install and remove and has a stable connection: The water tank and the water flosser housing are detachably connected by a magnetic assembly, which is simple to operate and easy to install and remove. At the same time, the setting of at least two one-to-one magnets enhances the connection stability and sealing between the water tank and the water flosser housing, effectively preventing the water tank from loosening, falling off and leaking, thus improving the user experience.

[0019] 3. Stable structure and good waterproof performance: The back cover is installed inside the water flosser housing. The soft rubber inner frame on the back cover is integrally molded with the back cover, which can effectively prevent external liquids from entering the water flosser and protect the internal electrical components. The components are fixedly connected to each other to ensure the structural stability of the water flosser during operation, reduce the impact of vibration on the components, and extend the product's service life.

[0020] 4. Practical and easy to operate: The button switches on the control panel allow users to easily turn the machine on and off, switch working modes, and control the nozzle rotation. The operation is intuitive and simple, requiring no complicated learning process, and is suitable for users of different ages. The design of extending the water pipe to the bottom of the water tank improves the utilization rate of water resources in the tank and avoids water waste. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall exploded structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the overall external structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the connection structure between the oral irrigator and the water tank of this utility model;

[0024] Figure 4 This is a schematic diagram of the exploded structure of the rotating head of this utility model;

[0025] Figure 5 This is a schematic diagram of the cross-sectional structure of the water storage tank of this utility model;

[0026] Figure 6 This is a schematic diagram of the gearbox bracket structure of this utility model;

[0027] Figure 7 This is a schematic diagram of the rotary head transmission structure of this utility model.

[0028] Numbered in the diagram: 1. Water flosser housing; 2. Water tank; 3. Magnet assembly; 31. First magnet; 32. Second magnet; 4. Battery; 5. Water pump assembly; 6. PCB board; 7. Gearbox bracket; 8. Gearbox motor; 9. Pinion; 10. Gear; 11. Rotating head bracket; 12. Nozzle rotating head; 13. Nozzle; 14. Outer housing; 15. Inner frame with soft rubber cover; 16. Waterproof back cover; 17. Bottom cover; 18. Charging port; 19. Button panel; 20. Button switch; 21. Through hole; 22. Annular cavity; 23. Water pump adapter pipe; 24. Water suction pipe; 25. Water suction head. Detailed Implementation

[0029] To facilitate understanding of this utility model, a more complete description of it will be provided below with reference to the accompanying drawings. The drawings show preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0030] Please refer to Figures 1-7As shown, a water flosser with a rotatable nozzle includes a water flosser housing 1, which is elongated for easy gripping. A removable water tank 2 is mounted on one side of the water flosser housing 1. The shape of the water tank 2 matches the side profile of the water flosser housing 1, resulting in a neat overall appearance of the water flosser after installation, while also ensuring a large water storage capacity for the water tank 2.

[0031] A battery 4 is installed near the bottom inside the water flosser housing 1. The battery 4 is rechargeable and can continuously power the electrical components of the entire water flosser. A water pump assembly 5 is installed above the battery 4 inside the water flosser housing 1. The water pump assembly 5 is electrically connected to the battery 4 via wires, and the battery 4 provides the power required for the water pump assembly 5 to operate.

[0032] A PCB board 6 is mounted on one side of the water pump assembly 5. The PCB board 6 is fixedly connected to the water flosser housing 1 with screws to ensure that the PCB board 6 remains stable during the operation of the water flosser. The PCB board 6 is electrically connected to the battery 4, the water pump assembly 5, and the geared motor 8 through wires, and is used to receive and process user operation commands and control the working status of each component according to the commands.

[0033] A gearbox bracket 7 is provided at the other end of the water pump assembly 5. The gearbox bracket 7 is fixedly connected to the inner wall of the water flosser housing 1 by screws. The position of the gearbox bracket 7 is close to the top of the water flosser housing 1 to facilitate the installation and use of the nozzle 13. A geared motor 8 is fixedly installed on one side of the gearbox bracket 7. The geared motor 8 is fixedly connected to the gearbox bracket 7 by screws, and the output shaft of the geared motor 8 faces the inside of the gearbox bracket 7.

[0034] The output shaft of the geared motor 8 passes through a shaft hole in the gearbox bracket 7, and a small gear 9 is fitted onto the end of the output shaft. The small gear 9 is fixed to the output shaft of the geared motor 8 by a key connection, ensuring that the geared motor 8 can drive the small gear 9 to rotate synchronously when it rotates. A large gear 10 meshes with one side of the small gear 9. The diameter of the large gear 10 is larger than that of the small gear 9. Through the meshing transmission between the small gear 9 and the large gear 10, the effect of speed reduction and torque increase is achieved, making the rotation process of the nozzle 13 more stable.

[0035] On the other side of the large gear 10, a rotating head bracket 11 is fixedly connected by screws. The rotating head bracket 11 has a cylindrical structure, and its axis coincides with the axis of the gearbox bracket 7, ensuring that the rotating head bracket 11 can rotate stably along the axis of the gearbox bracket 7. A nozzle rotating head 12 is fixedly connected to the outer side of the rotating head bracket 11 by an interference fit. One end of the nozzle rotating head 12 is connected to a nozzle 13. The nozzle 13 and the nozzle rotating head 12 are detachably connected, allowing users to easily replace different types of nozzles 13 as needed.

[0036] The rotating head support 11 can rotate around the water flosser housing 1 within a range of 0°-180°. When the reduction motor 8 is working, the meshing transmission between the pinion 9 and the gear 10 drives the rotating head support 11, the nozzle rotating head 12, and the nozzle 13 to swing synchronously within a range of 0°-180°. During the rotation, the spray direction of the nozzle 13 changes accordingly. Users can adjust the rotation angle and speed of the nozzle 13 by controlling the working state of the reduction motor 8 according to their oral cleaning needs, thereby achieving precise cleaning of different parts of the oral cavity.

[0037] The outer shell 14 is fitted onto the outer side of the water flosser housing 1. The outer shell 14 has an arc-shaped design that conforms to the curve of the human hand, providing a comfortable grip for the user. The surface of the outer shell 14 is treated with an anti-slip coating to prevent the water flosser from slipping due to wet hands during use.

[0038] A waterproof back cover 16 is installed on the inside of the water flosser housing 1. The waterproof back cover 16 is fixedly connected to the water flosser housing 1 by a buckle. The edge of the waterproof back cover 16 is provided with a sealing strip to further enhance the waterproof effect and prevent external water or other liquids from entering the interior of the water flosser housing 1, thus protecting electrical components such as the battery 4 and PCB board 6 from damage.

[0039] The waterproof back cover 16 is fitted with a soft rubber inner frame 15. The soft rubber inner frame 15 and the waterproof back cover 16 are made by a one-piece molding process. This molding process ensures that there are no gaps between the soft rubber inner frame 15 and the waterproof back cover 16, which can effectively prevent water from seeping in. At the same time, the soft rubber inner frame 15 can also play a cushioning role, reducing the impact on the internal components when the water flosser is hit by external force.

[0040] Below the waterproof back cover 16 is a bottom cover 17, which is fixedly connected to the water flosser housing 1 by screws. The bottom cover 17 has a charging port 18, and a waterproof plug is installed at the charging port 18. When the water flosser is not charging, the waterproof plug is tightened to prevent moisture from entering the water flosser through the charging port 18. The charging port 18 is electrically connected to the battery 4 via a wire. The user can connect the charging port 18 to an external power source to charge the battery 4 using a charging cable.

[0041] A button panel 19 is installed on the side of the water flosser housing 1 adjacent to the nozzle 13. The button panel 19 is fixedly connected to the water flosser housing 1 by adhesive bonding. The surface of the button panel 19 is flush with the surface of the outer housing 14 to ensure the flatness of the overall appearance of the water flosser. The button panel 19 is equipped with multiple push-button switches 20, corresponding to the power on / off button, water pressure adjustment button, nozzle 13 rotation start / stop button, and nozzle 13 rotation direction adjustment button, etc. The user sends corresponding operation commands to the PCB board 6 by pressing different push-button switches 20.

[0042] A through hole 21 is provided above the button panel 19. The shape of the through hole 21 is adapted to the cross-sectional shape of the nozzle rotating head 12. The nozzle rotating head 12 passes through the through hole 21 and extends to the outside of the water flosser housing 1. A certain gap is left between the inner wall of the through hole 21 and the nozzle rotating head 12 to ensure that the nozzle rotating head 12 can rotate freely in the through hole 21. At the same time, the gap is small, which can prevent external dust, impurities and other contaminants from entering the interior of the water flosser housing 1.

[0043] A magnet assembly 3 is installed on one side of the waterproof back cover 16. Two first magnets 31 are glued to the surface of the waterproof back cover 16, located symmetrically near the top and bottom of the waterproof back cover 16. A second magnet 32, which cooperates with the first magnet 31, is glued to the inner wall of the water tank 2 near the water flosser housing 1. The position of the second magnet 32 ​​corresponds one-to-one with the position of the first magnet 31, ensuring precise attraction between the first magnet 31 and the second magnet 32 ​​when the water tank 2 is close to the water flosser housing 1.

[0044] Inside the water tank 2, there is a water suction pipe 24 made of flexible material. One end of the water suction pipe 24 is connected to the water suction head 25 via an interference fit. The water suction head 25 penetrates the side wall of the water tank 2 near the water flosser housing 1, and the connection between the water suction head 25 and the side wall of the water tank 2 is sealed with sealant to prevent water leakage from the water tank 2. The other end of the water suction pipe 24 extends to the bottom of the water tank 2, with the end of the water suction pipe 24 pointing towards the corner of the bottom of the water tank 2. This design ensures that even when the water level in the water tank 2 is low, the water suction pipe 24 can still successfully draw water from the bottom of the water tank 2, avoiding water waste. The end of the water suction head 25 away from the water suction pipe 24 is connected to the water inlet of the water pump assembly 5 via a thread, and a sealing ring is fitted at the connection point to further enhance the sealing of the connection and prevent water leakage during transportation.

[0045] One side of the gearbox bracket 7 has an annular cavity 22, the inner diameter of which is slightly larger than the outer diameter of the large gear 10. The large gear 10 is installed inside the annular cavity 22 and can rotate freely within it. The annular cavity 22 not only provides installation space for the large gear 10 but also protects it from external dust and impurities entering the meshing part between the large gear 10 and the small gear 9, thus affecting the transmission effect. On the other side of the gearbox bracket 7, a water pump adapter pipe 23 is fixedly installed by welding. One end of the water pump adapter pipe 23 is connected to the water flow channel inside the gearbox bracket 7, and the other end is connected to the water inlet of the nozzle rotating head 12 via a sealed bearing. The sealed bearing ensures the relative rotation between the water pump adapter pipe 23 and the nozzle rotating head 12 while preventing water leakage from the connection point. A port is located on the lower side of the gearbox bracket 7. This port is threaded to the outlet of the water pump assembly 5, and PTFE tape is wrapped around the connection to enhance the sealing.

[0046] When the user needs to use the water flosser, first fill the water tank 2 with cleaning water, then bring the water tank 2 close to one side of the water flosser housing 1, so that the second magnet 32 ​​on the water tank 2 precisely engages with the first magnet 31 on the waterproof cover 16 of the back shell, completing the installation of the water tank 2. Next, the user holds the outer housing 14 of the water flosser and presses the power button on the button panel 19. At this time, the PCB board 6 receives the power-on command and controls the battery 4 to supply power to the water pump assembly 5 and the geared motor 8.

[0047] After the water pump assembly 5 is powered on, it starts to work, drawing water from the water tank 2 into the water pump assembly 5 through the water pump pipe 24 and the water pump head 25. Then the water is pressurized and delivered to the interface of the gearbox bracket 7 through the outlet of the water pump assembly 5. Then it flows into the water pump adapter pipe 23 through the water flow channel inside the gearbox bracket 7. Finally, it is delivered to the nozzle rotating head 12 through the water pump adapter pipe 23 and sprayed out from the nozzle 13 to form a high-pressure water flow for cleaning the oral cavity.

[0048] If a user needs to clean different parts of the mouth, they can press the nozzle 13 rotation start button on the button panel 19. Upon receiving this command, the PCB board 6 controls the geared motor 8 to start working. The output shaft of the geared motor 8 drives the pinion 9 to rotate. The pinion 9, through meshing with the large gear 10, drives the large gear 10 to rotate. The large gear 10 then drives the rotating head bracket 11, which is fixedly connected to it, to rotate. The rotating head bracket 11 drives the nozzle rotating head 12 and the nozzle 13 to rotate synchronously. The user can also control the forward and reverse rotation of the geared motor 8 by pressing the nozzle 13 rotation direction adjustment button, thereby changing the rotation direction of the nozzle 13. At the same time, the user can adjust the working power of the water pump assembly 5 by pressing the water pressure level adjustment button, thereby changing the pressure of the water jet from the nozzle 13 to adapt to different cleaning scenarios.

[0049] After cleaning is complete, the user presses the power button. The PCB board 6 receives the power-off command, controlling the water pump assembly 5 and the geared motor 8 to stop working. At the same time, the power supply from the battery 4 to the electrical components is cut off, and the water flosser stops working. At this time, the user can gently pull the water tank 2 to separate the first magnet 31 from the second magnet 32, remove the water tank 2 from the water flosser housing 1, empty the remaining water in the water tank 2, and clean the water tank 2 for next use.

[0050] Working principle

[0051] The working principle of this oral irrigator revolves around water flow delivery and nozzle rotation 13, and is achieved through overall coordinated control via PCB board 6. Water tank 2 stores cleaning water. After the oral irrigator is started, battery 4 powers the water pump assembly 5, whose internal motor drives the impeller to rotate, creating negative pressure. This draws water from the water tank 2 through the suction pipe 24 extending to the bottom and the suction head 25. Under the centrifugal force generated by the high-speed rotation of the impeller, the water is thrown against the inner wall of the water pump chamber, continuously compressed to form a high-pressure water flow. This water flow enters the gearbox bracket 7 interface through the outlet of the water pump assembly 5, and then flows into the water pump adapter 23 through its internal water flow channel. The sealed bearing between the water pump adapter 23 and the nozzle rotating head 12 allows the nozzle rotating head 12 to rotate freely while preventing leakage. Finally, the water flow is sprayed out from the nozzle 13 to achieve oral cleaning. The rotation of nozzle 13 is powered by a geared motor 8, which is electrically connected to battery 4 and PCB board 6. When the user presses the relevant button, PCB board 6 sends a signal to control the start, stop, and reverse rotation of geared motor 8. The motor output shaft drives pinion 9 to rotate. Through the meshing transmission between pinion 9 and large gear 10, large gear 10 drives the connected rotating head bracket 11 to rotate, thereby causing nozzle rotating head 12 and nozzle 13 to rotate synchronously. PCB board 6 has a preset program that controls the number of rotations of the motor to limit the rotation angle of nozzle 13 to 0°-180°. When the limit position is reached, the motor is controlled to stop or reverse. Throughout the process, PCB board 6 acts as the core, receiving button commands and coordinating water flow delivery and nozzle 13 rotation system. For example, when cleaning back teeth, it controls nozzle 13 to turn backward and adjusts water pressure. At the same time, the waterproof system of back cover waterproof cover 16 and soft rubber inner frame 15, and the magnetic assembly 3 connecting water tank 2 and housing 1, respectively ensure equipment safety and operational stability.

[0052] The embodiments described above merely illustrate the preferred implementation of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A dental flosser with a rotatable nozzle, characterized in that, The device includes a water flosser housing (1), a removable water tank (2) installed on one side of the water flosser housing (1), a battery (4) and a water pump assembly (5) installed inside the water flosser housing (1), a PCB board (6) installed on one side of the water pump assembly (5); a gearbox bracket (7) is provided at the other end, the gearbox bracket (7) is fixedly connected to the water flosser housing (1), and a geared motor (8) is fixedly installed on one side of the gearbox bracket (7); the output shaft end of the geared motor (8) passes through... A small gear (9) is fitted onto a gearbox bracket (7); a large gear (10) meshes with one side of the small gear (9), and a rotating head bracket (11) is fixedly connected to the other side of the large gear (10); a nozzle rotating head (12) is fixedly connected to the outside of the rotating head bracket (11), and a nozzle (13) is connected to one end of the nozzle rotating head (12). The gearbox is driven by a reduction motor (8) to make the nozzle (13) and the nozzle rotating head (12) rotate along the axis of the gearbox bracket (7).

2. The rotatable nozzle oral irrigator according to claim 1, characterized in that, An outer shell (14) is installed on the outside of the water flosser housing (1), and a back waterproof cover (16) is installed on the inside of the water flosser housing (1); a soft rubber inner frame (15) is installed on the back waterproof cover, and the soft rubber inner frame (15) and the back waterproof cover are integrally formed with rubber coating; a bottom cover (17) is installed below the back waterproof cover (16), and a charging port (18) is provided on the bottom cover (17).

3. A dental flosser with a rotatable nozzle according to claim 1, characterized in that, A button panel (19) is installed on the side of the water flosser housing (1) adjacent to the nozzle (13). A button switch (20) is provided on the button panel (19). A through hole (21) is opened above the button panel (19), and the nozzle rotating head (12) passes through the through hole (21).

4. A dental flosser with a rotatable nozzle according to claim 2, characterized in that, A magnet assembly (3) is installed on one side of the waterproof cover (16). The magnet assembly (3) includes a first magnet (31) and a second magnet (32) that is magnetically attracted to it. The first magnet (31) is installed on one side of the waterproof cover (16), and the second magnet (32) is installed on one side of the water tank (2). The first magnet (31) and the second magnet (32) are attracted to each other. There are at least two of each of the first magnet (31) and the second magnet (32), and they are arranged in a one-to-one correspondence.

5. A dental flosser with a rotatable nozzle according to claim 1, characterized in that, The gearbox bracket (7) has an annular cavity (22) on one side and a water pump adapter pipe (23) fixedly installed on the other side. The lower side of the gearbox bracket (7) is fixedly connected to the outlet of the water pump assembly (5).

6. A dental flosser with a rotatable nozzle according to claim 1, characterized in that, The water tank (2) is equipped with a water pump pipe (24). One end of the water pump pipe (24) is connected to the water pump head (25), and the other end extends to the bottom of the water tank (2). The water pump head (25) penetrates the wall of the water tank (2) and is connected to the water inlet of the water pump assembly (5).

7. A dental flosser with a rotatable nozzle according to claim 1, characterized in that, The rotating head support (11) can rotate around the water flosser housing (1) in the range of 0°-180°.

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