Structure of a rotatable jet of an oral irrigator

Abstract

The utility model discloses a structure of rotatable spray head of oral irrigator relates to oral cleaning equipment technical field, contains rotating head subassembly and reduction gear box subassembly. Rotating head subassembly has rotating head shell, rotating fixed support, and shell is equipped with rotating shaft and spray head, and rotating shaft and shell can integral injection molding or disassembly assembly, and reduction gear box subassembly contains boss gear, motor gear, reduction motor and reduction gear box, and reduction motor drive assembly makes spray head rotate. Shell can rotate in 0 degree 180 degree around host computer shell, and reduction gear box sets water outlet, and the water pump water is to spray head through specific path. Still set up O type sealing washer, sealed plug and so on sealing structure, and magnet induction structure, and through PCB board control can realize spray head automatic folding and opening, solve traditional spray head fixed position, can not automatic folding, and the problem such as inconvenient storage, improve use experience, science and technology sense and portability.

Description

Technical Field

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

[0002] In the field of oral care, water flossers have gradually become an important tool for home and personal oral care due to their highly efficient cleaning capabilities. The working principle of a water flosser is to use a water pump to generate a high-pressure water flow, which is then delivered to the oral cavity through the nozzle to rinse and clean the teeth and gums. As the key component of the water flosser that comes into contact with the oral cavity, the nozzle's structural design directly affects the user experience, cleaning effect, and portability.

[0003] Currently, the design of mainstream oral irrigator nozzles has several shortcomings. Firstly, regarding nozzle angle adjustment, most oral irrigator nozzles are fixedly installed. Users need to constantly adjust their head position or the position of the irrigator body to match the nozzle angle when cleaning different areas of the mouth (such as the inside of teeth, gingival sulcus, and posterior teeth). This is cumbersome and makes it difficult to ensure that every area is thoroughly rinsed, limiting the cleaning effect. While some oral irrigators are designed for manual nozzle angle adjustment, the adjustment range is limited, typically only 30-60 degrees. This fails to meet users' needs for comprehensive oral cleaning, and the manual adjustment method lacks convenience and intelligence.

[0004] Secondly, regarding portability and storage, traditional water flossers lack an automatic retractable nozzle, which remains extended when not in use. This design not only results in a larger overall size and greater space usage, making it inconvenient for users to store in small spaces such as handbags or suitcases, causing significant inconvenience when traveling, but also makes the extended nozzle susceptible to collisions and friction with other items during transport, potentially damaging or contaminating it and affecting the water flosser's lifespan and hygiene.

[0005] Furthermore, in terms of product intelligence and technological sophistication, existing water flosser nozzles have simple structures and lack intelligent design. Users need to manually turn the water flosser on and off, and manually adjust the nozzle angle. It cannot automatically open, retract, or adjust the nozzle according to usage needs. The user experience is rather simplistic, failing to meet consumers' demands for intelligent products and failing to demonstrate a high level of technological sophistication, thus lacking a competitive edge in the market.

[0006] In addition, regarding water circuit design, some oral irrigators have poorly designed water channels, which can lead to leaks and pressure losses during water flow, resulting in unstable water pressure from the nozzle and affecting cleaning effectiveness. Furthermore, the connection between the water circuit and the transmission structure is not tight enough, making them prone to interference and further reducing the reliability of the oral irrigator.

[0007] In summary, current oral irrigator nozzle structures have significant shortcomings in terms of angle adjustment, portability, smart features, and water circuit design, failing to meet users' comprehensive needs for convenience, intelligence, portability, and cleaning effectiveness. Therefore, developing a rotatable nozzle structure for oral irrigators that can rotate from 0 to 180 degrees, automatically retract and open, possess smart features and a high-tech feel, and has a rationally designed water circuit has become an urgent problem to be solved in the current oral irrigator technology field. Utility Model Content

[0008] The purpose of this utility model is to overcome the shortcomings of existing oral irrigator nozzles, such as the inability to rotate from 0 to 180 degrees, the lack of automatic retraction and opening functions, the lack of intelligent effects and technological feel, poor portability and storage, and unreasonable water circuit design, and to provide a structure for a rotating nozzle of an oral irrigator.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A rotating nozzle structure for a water flosser includes a rotating head assembly and a reduction gearbox assembly. The rotating head assembly includes a rotating head housing and a rotating fixing bracket. A rotating shaft is located on one side of the rotating head housing, and a nozzle is mounted on the other side. The nozzle can rotate around the rotating shaft from 0 degrees to 180 degrees, a range that fully covers the angles required for oral cleaning, meeting the user's cleaning needs for different areas such as the inner and outer surfaces of teeth, the gingival sulcus, and posterior teeth. One side of the rotating fixing bracket is nested outside the rotating shaft, and a main housing is mounted on one side of the rotating fixing bracket. The main housing provides external protection for the entire rotating nozzle structure and also provides a mounting carrier for the various components. The reduction gearbox assembly includes a boss gear, a motor gear, a reduction motor, and a reduction gear. The gearbox contains a boss gear installed inside, which meshes with the motor gear. Power is transmitted through gear meshing. The geared motor is mounted on one side of the motor gear and fixed to the outside of the gearbox. As a power source, the geared motor drives the gear set of the gearbox assembly to rotate, which in turn drives the rotating head assembly associated with the gearbox assembly to move. This causes the nozzle to rotate along the axis of the rotating bushing of the gearbox, realizing the automatic rotation function of the nozzle. This structure, through the cooperation of the gearbox assembly and the rotating head assembly, makes the product more intelligent and technologically advanced. The water flosser nozzle can automatically retract and open, making it convenient for users. At the same time, the nozzle can be stored when going out, greatly reducing the overall size of the product and making it easy to carry.

[0011] Furthermore, the rotating bushing of the reduction gearbox is a hollow water outlet hole. The water pumped out by the water pump passes through the water outlet channel inside the water irrigator, and then through the hollow hole of the rotating bushing to the rotating head assembly. Finally, the water is sprayed through the nozzle to achieve the water irrigating function. This water path design ensures that the water flow path is clear and smooth during transmission, effectively avoids water leakage and pressure loss, ensures stable water pressure from the nozzle, and improves the cleaning effect.

[0012] Furthermore, the rotating shaft and the rotating head housing of the rotating head assembly can be injection molded together. The one-piece injection molding method can enhance the connection strength between the rotating shaft and the rotating head housing, reduce assembly steps, improve production efficiency, and reduce production costs. At the same time, the rotating shaft and the rotating head housing can also be assembled separately. The separate assembly method facilitates the individual processing, replacement, and maintenance of the rotating shaft or the rotating head housing during the production process, increases the flexibility of structural design, and allows for the selection of appropriate processing and assembly methods according to actual production needs and usage scenarios.

[0013] Furthermore, the inner wall of the rotating head housing is fixedly connected to the outer wall of the rotating fixed bracket, ensuring the stability of the connection between the rotating head housing and the rotating fixed bracket and preventing loosening during rotation; a first O-ring is provided in the annular gap between the inner wall of the main housing and the outer wall of the rotating fixed bracket. The first O-ring can effectively fill the gap between the main housing and the rotating fixed bracket, playing a sealing role, preventing external dust and impurities from entering the internal components, and preventing water leakage in the internal water circuit, thus ensuring the normal working environment of the internal components of the oral irrigator.

[0014] Furthermore, a second O-ring is installed on the outer side of the rotating shaft. The second O-ring further enhances the sealing between the rotating shaft and the rotating bushing, preventing water leakage from the gap between the rotating shaft and the rotating bushing and ensuring the sealing of the water path. A nozzle fastener is installed on the inner side of the rotating head housing adjacent to the nozzle. The nozzle fastener is used to firmly install the nozzle on the rotating head housing, preventing the nozzle from falling off during use, ensuring the stability and reliability of the nozzle installation, and facilitating disassembly and replacement when the nozzle is damaged.

[0015] Furthermore, the reduction gearbox is fixed inside the main housing by screws. The screw connection method is characterized by a firm connection and convenient disassembly, facilitating the installation, maintenance, and replacement of the reduction gearbox. A rotating bushing is provided on one side of the reduction gearbox to cooperate with the rotating shaft. The rotating bushing and the rotating shaft are clearance-fitted to ensure that the rotating shaft can rotate smoothly around the axis of the rotating bushing. At the same time, the rotating bushing guides the rotating shaft to ensure coaxiality during rotation. A fluid channel is provided at the center of the rotating bushing and the rotating shaft. This fluid channel is connected to the hollow water outlet hole of the rotating bushing of the reduction gearbox, forming a complete water circuit to ensure that the water pumped by the water pump can be smoothly delivered to the nozzle through the fluid channel.

[0016] Furthermore, one side of the reduction gearbox is provided with a receiving cavity to accommodate the boss gear. The receiving cavity provides installation space for the boss gear and also limits the boss gear to prevent it from shifting during rotation, ensuring the accuracy and stability of the meshing between the boss gear and the motor gear. The receiving cavity is provided with a limiting bone, which further limits the rotation range of the boss gear, preventing excessive rotation of the boss gear from causing the nozzle rotation angle to exceed the design range of 0-180 degrees, ensuring precise control of the nozzle rotation angle. A pump outlet pipe is installed on the side away from the boss gear. The pump outlet pipe is used to connect the water pump and the reduction gearbox, delivering the water pumped by the pump to the hollow water outlet of the reduction gearbox. A PCB board is provided between the pump outlet pipe and the reduction gearbox. The PCB board serves as the control core of the water flosser, used to control the start, stop, and speed of the reduction motor, thereby controlling the rotation, automatic retraction, and automatic opening of the nozzle. At the same time, the PCB board integrates relevant circuit components to realize the various functions of the water flosser.

[0017] Furthermore, one side of the boss gear is provided with at least two protruding posts, which are fixedly connected to the rotating fixed bracket. Through the fixed connection between the protruding posts and the rotating fixed bracket, the rotational power of the boss gear is transmitted to the rotating fixed bracket, thereby driving the entire rotating head assembly to rotate and realize the rotational movement of the nozzle. The setting of at least two protruding posts can ensure the balance and stability of the connection between the boss gear and the rotating fixed bracket, and avoid structural damage caused by uneven force during power transmission. The other side of the boss gear is provided with a limiting groove that matches the limiting bone. The limiting groove and the limiting bone cooperate with each other to further precisely limit the rotation angle of the boss gear, ensuring that the nozzle can rotate accurately within the range of 0 degrees to 180 degrees, and preventing damage to the nozzle or internal components due to excessive rotation of the boss gear.

[0018] Furthermore, the geared motor and the gearbox are fixedly connected by countersunk screws. The countersunk screws allow the screw head to be recessed into the mounting surface of the geared motor or gearbox, preventing the screw head from protruding and affecting the installation and movement of other components, while ensuring the firmness of the connection between the geared motor and the gearbox. A soft rubber block and a hard rubber block are installed between the geared motor and the gear. The soft rubber block has a certain degree of elasticity, which can act as a buffer, reducing the transmission of vibration generated by the geared motor during operation to the gear, reducing noise, and preventing vibration from causing misalignment between the gear and the boss gear. The hard rubber block serves to fix and support, ensuring the relative position stability between the geared motor and the gear, and ensuring the accuracy and reliability of power transmission.

[0019] Furthermore, a magnet is installed on one side of the rotating fixed bracket. When the rotating head assembly drives the rotating fixed bracket to a fixed position, the magnet senses the switch on the PCB board. Through magnetic induction, the functions of the water flosser are turned on and off. For example, when the nozzle is rotated to the open position (such as the 0-degree position, i.e., the nozzle is in the working extended state), the magnet senses the switch on the PCB board, triggering the water flosser to start spraying water. When the nozzle is rotated to the retracted position (such as the 180-degree position, i.e., the nozzle is in the retracted state), the magnet senses the switch on the PCB board again, triggering the water flosser to stop spraying water. At the same time, the retracted state of the nozzle can be locked to prevent the nozzle from being accidentally opened during carrying, further improving the intelligence and ease of use of the product.

[0020] Furthermore, a soft rubber cover is installed between the reduction gearbox and the main housing. The soft rubber cover is tightly attached to the contact surface between the reduction gearbox and the main housing, which serves to waterproof the two and prevent external water or other liquids from entering the reduction gearbox and damaging the internal gear set and reduction motor. At the same time, it can also prevent water leakage in the internal water circuit of the reduction gearbox, ensuring the waterproof performance and safety of the water flosser and extending the service life of the product.

[0021] Furthermore, the end through hole of the pump outlet connector is provided with a sealing plug, which can effectively seal the end through hole of the pump outlet connector to prevent water in the water circuit from leaking from the end of the pump outlet connector when the water pump stops working. At the same time, it prevents external dust and impurities from entering the water circuit through the end through hole of the pump outlet connector and contaminating the water circuit, thus ensuring the cleanliness and sealing of the water circuit.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. Achieve 0-180 degree rotation of the nozzle: This utility model drives the rotating head assembly through a reduction gearbox assembly, enabling the nozzle to rotate from 0 to 180 degrees along the axis of the rotating bushing of the reduction gearbox. This rotation angle range can completely cover the angle required for oral cleaning. Users do not need to adjust their head posture or the position of the main body of the water flosser. The automatic rotation of the nozzle can thoroughly rinse different parts of the teeth, such as the inner and outer sides, gingival sulcus, and posterior teeth, greatly improving the convenience and cleaning effect.

[0024] 2. Features intelligent automatic storage: This structure uses a geared motor to drive a reduction gearbox assembly, enabling the nozzle to automatically retract and open. When the user is using the water flosser, the nozzle automatically opens to the working position; when the user is finished, the nozzle automatically retracts to the storage position. This not only makes the product more intelligent and technologically advanced, meeting consumers' demand for intelligent products, but also significantly reduces the overall size of the water flosser after the nozzle is retracted, making it easier for users to store and carry when going out, solving the problem of poor portability of traditional water flossers.

[0025] 3. The water circuit design is reasonable and the sealing performance is excellent: The rotating bushing of the reduction gearbox is designed with a hollow water outlet hole, which cooperates with the fluid channel of the rotating shaft to form a complete and smooth water circuit. The water pumped out by the water pump can be stably transmitted to the nozzle, avoiding water leakage and pressure loss, ensuring stable water pressure at the nozzle, and improving the cleaning effect. At the same time, through the setting of the first O-ring seal, the second O-ring seal, the soft rubber covering the main body, and the sealing plug, the main housing and the rotating fixed bracket, the rotating shaft and the rotating fixed bracket, the reduction gearbox and the main housing, and the end of the pump water outlet pipe are sealed respectively, ensuring the sealing performance of the water circuit and the waterproof performance of the product in all aspects, preventing water leakage from damaging internal components and extending the service life of the product.

[0026] 4. Flexible structural design and convenient installation and maintenance: The rotating shaft and the rotating head housing of the rotating head assembly can be selected to be integrally injection molded or assembled from disassembled parts. Integral injection molding can improve production efficiency and reduce costs, while disassembled assembly is convenient for individual processing, replacement and maintenance, increasing the flexibility of structural design; The reduction gearbox is fixed to the inside of the main housing with screws, and the reduction motor and the reduction gearbox are fixedly connected with countersunk screws. These connection methods are easy to disassemble, which facilitates the installation, maintenance and replacement of each component and reduces the later maintenance costs.

[0027] 5. Intelligent sensing control for convenient use: The magnet installed on the rotating fixed bracket senses the switch on the PCB board. When the rotating head assembly rotates to the fixed position, the water flosser function can be automatically turned on and off without manual operation by the user, further enhancing the product's intelligence and ease of use. At the same time, it can lock the nozzle in its stored state to prevent the nozzle from being accidentally opened during carrying, thus improving the reliability of the product. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall exploded structure of this utility model;

[0029] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0030] Figure 3 This is a schematic diagram of the overall cross-sectional structure of this utility model;

[0031] Figure 4 This is a schematic diagram of the rotating head assembly structure of this utility model;

[0032] Figure 5 This is an exploded structural diagram of the reduction gearbox assembly of this utility model;

[0033] Figure 6 This is a schematic diagram of the reduction gearbox structure of this utility model;

[0034] Figure 7 This is a schematic diagram of the boss gear structure of this utility model.

[0035] The diagram is labeled as follows: 1. Rotating head assembly; 11. Rotating head housing; 12. Rotating fixing bracket; 13. Rotating shaft; 131. Second O-ring seal; 132. Third O-ring seal; 14. Nozzle; 15. First O-ring seal; 16. Nozzle fastener; 17. Magnet; 2. Reduction gearbox assembly; 21. Reduction gearbox; 211. Receiving cavity; 212. Rotating bushing; 213. Fluid channel; 214. Limiting rib; 22. Boss gear; 221. Boss; 222. Limiting groove; 23. Motor gear; 24. Gearbox; 25. Soft rubber block; 26. Hard rubber block; 27. PCB board; 28. Pump outlet pipe; 281. Sealing plug; 29. ​​Soft rubber covering the main body; 30. Main housing. Detailed Implementation

[0036] 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.

[0037] Please see Figures 1-7A rotating nozzle structure for a water flosser includes a rotating head assembly 1 and a reduction gearbox assembly 2. The rotating head assembly 1 includes a rotating head housing 11 and a rotating fixing bracket 12. The rotating head housing 11 has a rotating shaft 13 on one side and a nozzle 14 mounted on the other side. The nozzle 14 can rotate around the rotating shaft 13 from 0 degrees to 180 degrees, a range that fully covers the angles required for oral cleaning, meeting the user's cleaning needs for different areas such as the inner and outer surfaces of teeth, the gingival sulcus, and posterior teeth. The rotating fixing bracket 12 is nested around the rotating shaft 13 on one side, and a main unit housing 30 is mounted on one side of the rotating fixing bracket 12. The main unit housing 30 provides external protection for the entire rotating nozzle structure and also provides a mounting carrier for each component. The reduction gearbox assembly 2 includes a boss gear 22, a motor gear 23, a reduction motor 24, and a reduction gear. The gearbox 21 has a boss gear 22 installed on one side. The boss gear 22 meshes with the motor gear 23, and the power is transmitted through gear meshing. The geared motor 24 is installed on one side of the motor gear 23 and fixed to the outside of the gearbox 21. The geared motor 24 serves as a power source, driving the gear set of the gearbox assembly 2 to rotate, which in turn drives the rotating head assembly 1 associated with the gearbox assembly 2 to move, causing the nozzle 14 to rotate along the axis of the rotating sleeve 212 of the gearbox 21, thus realizing the automatic rotation function of the nozzle 14. This structure, through the cooperation of the gearbox assembly 2 and the rotating head assembly 1, makes the product more intelligent and technological, allowing the water flosser nozzle 14 to automatically retract and open, making it convenient for users. At the same time, the nozzle 14 can be stored when going out, greatly reducing the overall size of the product and making it easy to carry.

[0038] The rotating head assembly 1 includes a rotating head housing 11, a rotating fixing bracket 12, a nozzle 14, and related seals. First, the processing method for the rotating shaft 13 and the rotating head housing 11 is selected based on production requirements: For high production efficiency, an integrated injection molding process is used to mold the rotating shaft 13 and the rotating head housing 11 into a single unit, ensuring strong connection. For ease of future maintenance, a disassembly and assembly method is used, fixing the separately processed rotating shaft 13 to a mounting groove on one side of the rotating head housing 11 using clips or screws. Then, the nozzle 14 is inserted into the mounting hole on the other side of the rotating head housing 11 and secured using a nozzle fastener 16. The nozzle fastener 16 is a ring-shaped structure with a protrusion on its inner side that matches a slot on the rotating head housing 11. After inserting the nozzle 14, pressing the nozzle fastener 16 engages it in the slot, thus securing the nozzle 14 to the rotating head housing 11 and preventing it from falling off during use. Next, a second O-ring 131 and a third O-ring 132 are fitted into the sealing groove on the outside of the rotating shaft 13. The sealing rings must completely fit the inner wall of the sealing groove to ensure a good seal. Finally, the rotating fixing bracket 12 is nested on the outside of the rotating shaft 13. The inner wall of the rotating fixing bracket 12 is clearance-fitted with the outer wall of the rotating shaft 13. At the same time, the outer wall of the rotating fixing bracket 12 is fixed to the inner wall of the rotating head housing 11 with screws to ensure that the rotating head housing 11 and the rotating fixing bracket 12 move synchronously. A magnet 17 is embedded in the designated mounting hole of the rotating fixing bracket 12. The magnet 17 is fixed with an interference fit to prevent displacement during rotation.

[0039] The reduction gearbox assembly 2 includes a reduction gearbox 21, a boss gear 22, a motor gear 23, a reduction motor 24, and a pump outlet pipe 28. First, the boss gear 22 is installed inside the receiving cavity 211 of the reduction gearbox 21. A limiting rib 214 is provided on the inner wall of the receiving cavity 211. The limiting groove 222 of the boss gear 22 must be aligned with the limiting rib 214 to ensure that the boss gear 22 can rotate around its axis within the receiving cavity 211 without shifting. Then, the motor gear 23 is installed on the output shaft of the reduction motor 24. The motor gear 23 and the output shaft of the reduction motor 24 are interference-fitted to ensure synchronous rotation. A soft rubber block 25 and a hard rubber block 26 are sequentially installed between the reduction motor 24 and the motor gear 23. The soft rubber block 25 fits against the housing of the reduction motor 24, and the hard rubber block 26 fits against the side of the motor gear 23. The three are fixed together with screws. The soft rubber block 25 absorbs motor vibration, and the hard rubber block 26 fixes the position of the motor gear 23. Subsequently, the geared motor 24, with the motor gear 23 assembled, is fixed to the outside of the gearbox 21 using countersunk screws. During fixing, the position needs to be adjusted to ensure precise meshing between the motor gear 23 and the boss gear 22, with the teeth fully aligned to ensure smooth power transmission. Next, a pump outlet pipe 28 is installed on the side of the gearbox 21 away from the boss gear 22. One end of the pump outlet pipe 28 is inserted into the water inlet of the gearbox 21 and sealed with a sealing ring, while the other end extends to the water pump position of the oral irrigator. A sealing plug 281, made of elastic material, is inserted into the through hole at the end of the pump outlet pipe 28 to completely block the through hole, preventing water leakage and impurities from entering. Finally, a PCB board 27 is installed between the pump outlet pipe 28 and the gearbox 21. The PCB board 27 is fixed to the mounting post of the gearbox 21 with screws. The circuit interface on the PCB board 27 is connected to the wiring terminals of components such as the geared motor 24 and the induction switch to realize the control function.

[0040] Finally, a ring-shaped soft rubber 29 is laid in the mounting area of ​​the reduction gearbox 21 inside the main housing 30, fitting snugly against the inner wall of the main housing 30. The assembled reduction gearbox 21 is then fixed to the inside of the main housing 30 with screws, ensuring even tightening to guarantee a tight fit between the reduction gearbox 21 and the main housing 30, compressing the soft rubber 29 for a waterproof seal. Next, the rotating head assembly 1 is connected to the reduction gearbox 21. The rotating bushing 212 on one side of the reduction gearbox 21 is inserted into the center hole of the rotating shaft 13. The rotating bushing 212 and the rotating shaft 13 have a clearance fit, and the fluid channels 213 at their centers are perfectly aligned to ensure water circulation. Simultaneously, the three protrusions 221 on the boss gear 22 are inserted into the corresponding mounting holes of the rotating fixed bracket 12, using an interference fit for fixation, achieving linkage between the boss gear 22 and the rotating fixed bracket 12.

[0041] Working principle

[0042] The working principle of a rotatable nozzle for a dental flosser revolves around four core aspects: power transmission, angle control, water transmission, and intelligent sensing. Regarding power transmission, the PCB board 27 controls the operation of the geared motor 24. The motor drives the motor gear 23, which in turn drives the boss gear 22 through gear meshing. The boss gear 22, with the help of the protrusion 221, rotates the fixed bracket 12, thereby driving the rotating head housing 11 and the nozzle 14, forming a complete power chain. For angle control, the limiting rib 214 of the accommodating cavity 211 of the gearbox 21 cooperates with the limiting groove 222 of the boss gear 22, limiting the rotation of the nozzle 14 to 0-180 degrees. Combined with the forward and reverse rotation of the motor, automatic opening and closing is achieved, meeting cleaning and storage needs. During water transmission, the high-pressure water generated by the pump flows through the pump outlet pipe 28 into the hollow rotating bushing 212 of the reduction gearbox 21, and then into the nozzle 14 through the fluid channel 213 of the rotating shaft 13. The first O-ring 15, the second O-ring 131, the third O-ring 132, and the soft rubber covering 29 ensure the water circuit is sealed to prevent leakage and ensure stable water pressure. In the intelligent sensing stage, the magnet 17 on the rotating fixed bracket 12 rotates with the nozzle 14. When it reaches the 0-degree or 180-degree position, it senses the induction switch on the PCB board 27, triggering the pump to start and stop and locking the nozzle 14. This achieves automatic linkage of functions, reduces manual operation, and improves intelligence and convenience. The overall structure works together to achieve automatic rotation and retraction of the nozzle 14, stable water supply, and intelligent control, solving the pain points of traditional oral irrigators.

[0043] 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 structure for a rotatable nozzle of a dental flosser, characterized in that, The system includes a rotating head assembly (1) and a reduction gearbox assembly (2); the rotating head assembly (1) includes a rotating head housing (11) and a rotating fixing bracket (12), the rotating head housing (11) has a rotating shaft (13) on one side and a nozzle (14) on the other side; one side of the rotating fixing bracket (12) is nested outside the rotating shaft (13), and one side of the rotating fixing bracket (12) is fitted with a main housing (30); the reduction gearbox assembly (2) includes a boss gear (22) and a motor gear. (23), a reduction motor (24) and a reduction gearbox (21), wherein a boss gear (22) is installed on the inner side of the reduction gearbox (21), the boss gear (22) meshes with the motor gear (23), the reduction motor (24) is installed on one side of the motor gear (23) and fixed to the outside of the gearbox (21), the reduction motor (24) drives the gear set of the reduction gearbox assembly (2) to rotate, causing the nozzle (14) to rotate along the axis of the rotating sleeve (212) of the reduction gearbox (21).

2. The structure of a rotatable nozzle for a dental flosser according to claim 1, characterized in that, The inner wall of the rotating head housing (11) is fixedly connected to the outer wall of the rotating fixed bracket (12), and a first O-ring (15) is provided in the annular gap between the inner wall of the main housing (30) and the outer wall of the rotating fixed bracket (12).

3. The structure of a rotatable nozzle for a dental flosser according to claim 1, characterized in that, A second O-ring (131) and a third O-ring (132) are installed on the outer side of the rotating shaft (13), and a nozzle fastener (16) is installed on the inner side of the rotating head housing (11) adjacent to the nozzle (14).

4. The structure of a rotatable nozzle for a dental flosser according to claim 1, characterized in that, The reduction gearbox (21) is fixed inside the main housing (30) by locking screws. A rotating bushing (212) that cooperates with the rotating shaft (13) is provided on one side of the reduction gearbox (21). A fluid channel (213) that communicates with each other is provided at the center of the rotating bushing (212) and the rotating shaft (13).

5. The structure of a rotatable nozzle for a dental flosser according to claim 1, characterized in that, The reduction gearbox (21) has a receiving cavity (211) on one side to accommodate the boss gear (22), and a limiting bone (214) is provided in the receiving cavity (211). A pump outlet pipe (28) is installed on the side away from the boss gear (22), and a PCB board (27) is provided between the pump outlet pipe (28) and the reduction gearbox (21).

6. The structure of a rotatable nozzle for a dental flosser according to claim 1, characterized in that, The boss gear (22) has at least two protruding posts (221) on one side, and the protruding posts (221) are fixedly connected to the rotating fixing bracket (12). The boss gear (22) has a limiting groove (222) that matches the limiting bone (214) on the other side.

7. The structure of a rotatable nozzle for a dental flosser according to claim 1, characterized in that, The geared motor (24) and the gearbox (21) are fixedly connected by countersunk screws. A soft rubber block (25) and a hard rubber block (26) are installed between the geared motor (24) and the motor gear (23).

8. The structure of a rotatable nozzle for a dental flosser according to claim 1, characterized in that, A magnet (17) is installed on one side of the rotating fixed bracket (12). The magnet and the magnetic switch of the PCB control the sensing to know that the nozzle has been stored in place.

9. The structure of a rotatable nozzle for a dental flosser according to claim 1, characterized in that, A body-covered soft rubber (29) is installed between the reduction gearbox (21) and the main housing (30).

10. The structure of a rotatable nozzle for a dental flosser according to claim 5, characterized in that, The end through hole of the pump outlet pipe (28) is provided with a sealing plug (281).

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