Water flow intensity control structure of oral irrigator

Abstract

The invention relates to the technical field of oral irrigators, in particular to an oral irrigator water flow intensity control structure which comprises a mounting shell, a water storage tank mounted at the bottom end in the mounting shell, a water pumping mechanism mounted at the upper end in the mounting shell and communicated with the water storage tank, and a spraying mechanism mounted on the upper end face of the mounting shell and communicated with the water pumping mechanism. A water outlet is formed in the upper end face of the mounting shell, the spraying mechanism comprises a communicating pipe mounted on the water outlet and communicated with the water outlet and a spray head mounted at the upper end of the communicating pipe, a protection structure used for reducing the influence of water flow impact force on teeth is arranged in the communicating pipe, and the water outlet is communicated with the output end of the water pumping mechanism. The water pumping mechanism is started, the water pumping mechanism pumps water in the water storage tank into the communicating pipe through the water outlet, at the moment, water flow makes contact with the protection structure, and due to the characteristics of the protection structure, the water flow can wash away stains on the teeth, and meanwhile the purpose of reducing the impact force of the water flow on the teeth is achieved.

Description

Technical Field

[0001] This application relates to the technical field of oral irrigators, and in particular to a water flow intensity control structure for an oral irrigator. Background Art

[0002] An oral irrigator is an auxiliary tool for oral cleaning. It uses the method of pulsed water flow impact to clean teeth and dental floss. Its main structure includes an installation housing, a water storage tank installed at the bottom end inside the installation housing, a water pumping mechanism installed at the upper end inside the installation housing and communicating with the water storage tank, and a spraying mechanism installed on the upper end surface of the installation housing and communicating with the water pumping mechanism. Among them, the water pumping mechanism mainly consists of a water pump, a water suction pipe installed at the bottom end of the water pump and extending into the water storage tank, and a connecting pipe installed at the upper end of the water pump and connecting to the spraying mechanism. When a user uses the oral irrigator, they only need to start the water pump. The water pump pumps out the water source in the water storage tank through the water suction pipe, then pumps it into the spraying mechanism through the connecting pipe, and finally sprays it out by the spraying mechanism. By putting the spraying mechanism into the oral cavity and aiming it at the teeth, tooth flushing can be carried out.

[0003] However, since a relatively large flushing force is required to wash away the stains on the teeth, the impact force of the water flow pumped into the spraying mechanism by the water pump is relatively large, causing the user to feel toothache when flushing their teeth, which greatly affects the user experience. Therefore, this application proposes a water flow intensity control structure for an oral irrigator to reduce the impact of the water flow on the teeth while being able to wash away the stains on the teeth. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of this application is to provide a water flow intensity control structure for an oral irrigator to reduce the impact of the water flow on the teeth while being able to wash away the stains on the teeth.

[0005] The above object of this application is achieved through the following technical solutions: A water flow intensity control structure for an oral irrigator includes an installation housing, a water storage tank installed at the bottom end inside the installation housing, a water pumping mechanism installed at the upper end inside the installation housing and communicating with the water storage tank, and a spraying mechanism installed on the upper end surface of the installation housing and communicating with the water pumping mechanism. An outlet is provided on the upper end surface of the installation housing. The spraying mechanism includes a connecting pipe installed on the outlet and communicating with the outlet, and a nozzle installed at the upper end of the connecting pipe. A protection structure for reducing the impact of the water flow on the teeth is provided inside the connecting pipe. The outlet communicates with the output end of the water pumping mechanism.

[0006] Further, the protection structure includes a cylindrical storage groove opened on the inner wall of the connecting pipe and arranged along the height direction of the connecting pipe, a water flow control pipe located inside the cylindrical storage groove and rotatably connected to the connecting pipe through the cylindrical storage groove, and a spiral plate fixed along the height direction of the water flow control pipe on the inner wall of the water flow control pipe.

[0007] By adopting the above technical solution, when the user uses the water flosser, the water pumping mechanism is started, and the water pumping mechanism pumps the water in the water storage tank through the water outlet into the connecting pipe. At this time, the water flow contacts the spiral plate on the water flow control pipe and rises along the spiral plate. At the same time, after the water flow contacts the spiral plate, due to the impact force of the water flow, it will also drive the water flow control pipe to rotate. The rotating water flow control pipe makes the water flow rise along the spiral plate faster and finally sprays out through the nozzle. At this time, because the water flow rises along the spiral plate and sprays out from the nozzle, the water flow sprayed out by the nozzle is a spiral water column. Therefore, the water column will not directly impact on the user's teeth, but will rotate and contact the user's teeth, so that the side of the water column contacts the user's teeth, thereby reducing the impact force of the water column on the user's teeth. And the remaining rotational force of the water column after contacting the user's teeth will cause the part of the water column hitting the user's teeth to disperse, so as to comprehensively wash the user's teeth. In this way, the purpose of reducing the impact of the water flow impact on the teeth while the water flow can wash away the stains on the teeth is achieved.

[0008] Furthermore, a limiting structure for restricting the rotation of the water flow control pipe is provided on the bottom surface of the water flow control pipe.

[0009] Furthermore, the limiting structure includes a plurality of limiting openings opened on the bottom surface of the water flow control pipe and arranged in a circular array on the bottom surface of the water flow control pipe with the center of the water flow control pipe as the base point, fixing openings opened on the upper end surface of the installation housing around the water outlet and opposite to the limiting openings, through openings opened on the outer side of the installation housing and communicating with the fixing openings, limiting rods inserted into the fixing openings, and a push rod with one end fixedly connected to the bottom end of the limiting rod and the other end extending out of the installation housing through the through opening.

[0010] By adopting the above technical solution, although the setting of the protection structure enables the water flow to wash away the stains on the teeth while reducing the impact of the water flow impact on the teeth, some users with relatively young ages will feel pain due to the impact of the spiral water column when being impacted by the spiral water column because their teeth are not fully developed. The setting of the limiting structure solves this technical problem. Through the setting of the limiting structure, when a user with a relatively young age needs to use the water flosser, only need to push the push rod upward, so that the push rod drives the limiting rod to move upward and extend out of the fixing opening and insert into the limiting opening. In this way, after the water flow contacts the spiral plate, because the limiting rod is inserted into the limiting opening to restrict the rotation of the water flow control pipe, at this time, the water flow in the water flow control pipe will only rise along the spiral plate. Due to the loss of the acceleration of the rotation of the water flow control pipe, the impact force of the water flow after spraying out from the nozzle is reduced, thereby reducing the impact of the water flow on the user's teeth. And because the teeth of this user with a relatively young age are not fully developed, a relatively small impact force can also wash away the stains on the user's teeth, improving the applicability and practicality of the protection structure.

[0011] Further, a circular connection port is provided around the water outlet, which is opened on the upper end surface of the installation housing and communicates with the fixed port. The circular connection port surrounds the water outlet, and a connection structure is provided in the circular connection port to quickly limit the water flow control pipe by the limiting structure.

[0012] Further, the connection structure includes a connection ring disposed at one end in the circular connection port and fixedly connected to the bottom end of the limiting rod, and a limiting rod disposed at the other end of the connection ring. The limiting rod and the limiting rod are arranged staggeredly, and telescopic structures are provided at the upper ends of both the limiting rod and the limiting rod.

[0013] Further, the telescopic structure at the upper end of the limiting rod includes an insertion block and a telescopic spring. One end of the telescopic spring is fixedly connected to the bottom surface of the insertion block, and the other end is fixedly connected to the upper end of the limiting rod. The telescopic structure at the upper end of the limiting rod has the same structure as the telescopic structure at the upper end of the limiting rod.

[0014] By adopting the above technical solutions, although the setting of the limiting structure improves the applicability and practicability of the protection structure, a special situation will occur when the user uses the limiting structure: since the previous user did not limit the rotation of the water flow control pipe when using the oral irrigator, when the current user needs to limit the rotation of the water flow control pipe, because the water flow control pipe has rotated, the upper end of the limiting rod is not directly opposite the limiting port on the water flow control pipe at this time, resulting in the limiting rod being unable to be inserted into the limiting port to limit the water flow control pipe after the user pushes up the push rod. The setting of the connection structure solves this technical problem. Through the setting of the connection structure, when the user pushes up the push rod, not only the limiting rod will rise, but the limiting rod will also rise together with the connection ring. At this time, if the limiting rod is not inserted into the limiting port, the limiting rod arranged staggeredly with it will be inserted into the limiting port to limit the water flow control pipe, which makes it more convenient for the user to use the limiting structure. The setting of the telescopic structure is to prevent the limiting rod or the limiting rod from not being inserted into the limiting port and abutting against the bottom surface of the water flow control pipe, so that the telescopic spring can be compressed to prevent the limiting rod or the limiting rod that cannot be inserted into the limiting port from affecting the limiting rod or the limiting rod that can be inserted into the limiting port.

[0015] Further, a support spring for pushing the push rod upward is provided on the bottom surface of the through port. One end of the support spring is fixedly connected to the bottom surface of the push rod, and the other end is fixedly connected to the installation housing at the bottom surface of the through port.

[0016] By adopting the above technical solution, although the setting of the limiting structure improves the applicability and practicality of the protective structure, the user needs to keep pushing the push rod when using the limiting structure, otherwise the push rod will fall due to gravity, resulting in the inability of the limiting structure to limit the water flow control tube. The setting of the support spring solves this technical problem. Through the setting of the support spring, the user does not need to push the push rod upward to limit the water flow control tube. When the water flow control tube needs to be rotated, it is only necessary to press down the push rod, and pressing down is more labor-saving than the user pushing the push rod upward.

[0017] Furthermore, a fixing structure for limiting the upward movement of the push rod is provided in the middle of the through opening.

[0018] Furthermore, the fixing structure includes two fixing plates respectively arranged on both sides of the through hole and a fixing rod passing through the two fixing plates and plugged into the fixing plates.

[0019] By adopting the above technical solution, although the support spring makes it easier for users to use the limiting structure, the user is still required to keep in contact with the push rod, which is very detrimental to the user's experience. The setting of the fixed structure solves this technical problem. Through the setting of the fixed structure, when the user needs the water flow control tube to rotate, he only needs to press down the push rod so that the push rod is lower than the fixed plate, and then use the fixed rod to pass through the two fixed plates. At this time, the push rod will be blocked by the fixed rod when it is pushed up by the support spring, and the user needs to keep pressing the push rod. When the user needs to limit the rotation of the water flow control tube, he only needs to pull out the fixed rod so that the fixed rod no longer blocks the push rod. At this time, the support spring can push the push rod to rise, so that the limiting rod or the limiting rod limits the rotation of the water flow control tube, thereby improving the user's experience.

[0020] In summary, the present application includes at least one of the following beneficial technical effects: Through the setting of the protection structure, when the user uses the oral irrigator, the water pumping mechanism is started. The water pumping mechanism extracts the water in the water storage tank through the water outlet into the connecting pipe. At this time, the water flow contacts the spiral plate on the water flow control pipe and rises along the spiral plate. At the same time, after the water flow contacts the spiral plate, due to the impact force of the water flow, the water flow control pipe will also be driven to rotate. The rotating water flow control pipe makes the water flow rise along the spiral plate faster and finally sprays out through the nozzle. At this time, because the water flow rises along the spiral plate and sprays out from the nozzle, the water flow sprayed out by the nozzle is a spiral water column. Therefore, the water column will not directly impact on the user's teeth, but will rotate and contact the user's teeth, making the side of the water column contact the user's teeth, thereby reducing the impact force of the water column on the user's teeth. And the remaining rotational force of the water column after contacting the user's teeth will cause the part of the water column hitting the user's teeth to disperse, thereby comprehensively flushing the user's teeth. In this way, the purpose of reducing the impact of the water flow impact on the teeth while the water flow can wash away the stains on the teeth is achieved. Description of the Drawings

[0021] Figure 1 is a schematic diagram of the overall structure of the embodiment; Figure 2 is Figure 1 the enlarged view of part A in Figure 3 is along Figure 2 the sectional view taken along line A-A in Figure 4 is Figure 3 the enlarged view of part B in Figure 5 is Figure 1 the exploded view of the overall structure of the embodiment after hiding the spraying mechanism in Figure 6 is Figure 5 the enlarged view of part C in

[0022] Reference numerals: 1, installation housing; 10, water outlet; 11, annular connection port; 2, spraying mechanism; 20, connecting pipe; 21, nozzle; 3, protection structure; 30, cylindrical storage groove; 31, water flow control pipe; 32, spiral plate; 4, limiting structure; 40, limiting port; 41, fixing port; 42, through port; 43, limiting rod; 44, pushing rod; 45, supporting spring; 5, connecting structure; 50, connecting ring; 51, limiting rod; 6, telescopic structure; 60, insertion block; 61, telescopic spring; 7, fixing structure; 70, fixing plate; 71, fixing rod. Detailed Description of the Embodiment

[0023] The following further describes the present application in detail with reference to the accompanying drawings.

[0024] Embodiment, referring to Figure 1 、Figure 2 , Figure 3 as well as Figure 4 A water flow intensity control structure of a water flosser includes a mounting shell 1, a water storage tank mounted at the bottom of the mounting shell 1, a pumping mechanism mounted at the upper end of the mounting shell 1 and connected to the water storage tank, and a spraying mechanism 2 mounted on the upper end of the mounting shell 1 and connected to the pumping mechanism. A water outlet 10 is provided on the upper end of the mounting shell 1 as a key channel for water flow transmission. The spraying mechanism 2 is composed of a connecting pipe 20 closely connected to the water outlet 10, and a nozzle 21 mounted on the top of the connecting pipe 20. In order to ensure that the user's teeth will not be subjected to excessive impact while enjoying the convenience of flushing, a protective structure 3 is provided inside the connecting pipe 20.

[0025] The protective structure 3 is composed of a cylindrical receiving groove 30 provided on the inner wall of the connecting pipe 20 and extending in the height direction thereof. It also includes a water flow control pipe 31 installed in the receiving groove, and the water flow control pipe 31 is rotatably connected to the connecting pipe 20 through the receiving groove. Inside the water flow control pipe 31, a spiral plate 32 is fixedly arranged in the height direction thereof.

[0026] When the user starts the water flosser, the pumping mechanism starts to work, and the pumping mechanism draws the water in the water tank into the connecting pipe 20 through the water outlet 10. At this time, the water flow will first contact the spiral plate 32 on the water flow control pipe 31, and slowly rise along the trajectory of the spiral plate 32. In this process, the impact force of the water flow not only drives the water flow to rise, but also drives the rotation of the water flow control pipe 31. The rotating water flow control pipe 31 further accelerates the rising speed of the water flow, so that the water flow can pass through the connecting pipe 20 more smoothly and finally spray out from the nozzle 21.

[0027] It is worth noting that, since the water flow rises along the spiral plate 32, the water column ejected from the nozzle 21 presents a spiral state. When the water column in this spiral state contacts the user's teeth, it does not directly hit them like a traditional water flow, but contacts the side of the teeth in a rotating manner. In this way, not only the impact force of the water flow on the teeth is greatly reduced, but the residual rotation force of the water column after contacting the teeth will also disperse the part that hits the teeth, thereby achieving comprehensive flushing of the teeth.

[0028] In summary, the water flow intensity control structure of this water flosser not only ensures that the water flow can effectively wash away the stains on the teeth, but also significantly reduces the impact of the water flow on the teeth through its unique spiral water flow design. This design undoubtedly provides users with a more comfortable and safe flushing experience, thereby achieving the purpose of improving the user experience.

[0029] Although the setting of the protection structure 3 enables the water flow to wash away the stains on the teeth while reducing the impact of the water flow impact force on the teeth, when some users with a younger age are impacted by the spiral water flow column, due to their incomplete tooth development at a younger age, the impact of the spiral water flow column will also cause pain to the user. The setting of the limit structure 4 solves this technical problem. To solve this technical problem, in this embodiment, a limit structure 4 for restricting the rotation of the water flow control pipe 31 is provided on the bottom surface of the water flow control pipe 31. The limit structure 4 includes a plurality of limit openings 40 opened on the bottom surface of the water flow control pipe 31 and arranged in an annular array with the center of the water flow control pipe 31 as the base point on the bottom surface of the water flow control pipe 31, a fixed opening 41 opened on the upper end surface of the installation housing 1 around the water outlet 10 and opposite to the limit opening 40, a through opening 42 opened on the outside of the installation housing 1 and communicating with the fixed opening 41, a limit rod 43 inserted into the fixed opening 41, and a push rod 44 with one end fixedly connected to the bottom end of the limit rod 43 and the other end extending out of the installation housing 1 through the through opening 42. When a user with a younger age needs to use the oral irrigator, only need to push the push rod 44 upward, so that the push rod 44 drives the limit rod 43 to move upward and extend out of the fixed opening 41 and insert into the limit opening 40. In this way, when the water flow contacts the spiral plate 32, because the limit rod 43 is inserted into the limit opening 40 to restrict the rotation of the water flow control pipe 31, at this time, the water flow in the water flow control pipe 31 will only rise along the spiral plate 32. Due to the loss of the acceleration of the rotation of the water flow control pipe 31, the impact force of the water flow ejected from the nozzle 21 is reduced, thereby reducing the impact of the water flow on the user's teeth. And because the user is at a younger age and the teeth are not fully developed, the smaller impact force can also wash away the stains on the user's teeth, improving the applicability and practicality of the protection structure 3.

[0030] Although the setting of the limit structure 4 improves the applicability and practicality of the protection structure 3, a special situation will occur when the user uses the limit structure 4: Since the previous user did not restrict the rotation of the water flow control pipe 31 when using the oral irrigator, when the current user needs to restrict the rotation of the water flow control pipe 31, because the water flow control pipe 31 has rotated, at this time, the upper end of the limit rod 43 is not directly opposite to the limit opening 40 on the water flow control pipe 31, resulting in that the limit rod 43 cannot be inserted into the limit opening 40 to restrict the water flow control pipe 31 after the user pushes the push rod 44 upward. To solve this technical problem, refer to Figure 5 、 Figure 6In this embodiment, a ring-shaped connection port 11 is provided around the water outlet 10. The ring-shaped connection port 11 is opened on the upper end surface of the installation housing 1 and communicates with the fixed port 41. The ring-shaped connection port 11 surrounds the water outlet 10. A connection structure 5 for quickly restricting the water flow control pipe 31 by the limiting structure 4 is provided in the ring-shaped connection port 11. The connection structure 5 includes a connection ring 50 disposed in the ring-shaped connection port 11 with one end fixedly connected to the bottom end of the limiting rod 43, and a limiting rod 51 disposed at the other end of the connection ring 50. The limiting rod 51 and the limiting rod 43 are arranged in a staggered manner. Telescopic structures 6 are provided at the upper ends of both the limiting rod 51 and the limiting rod 43. The telescopic structure 6 at the upper end of the limiting rod 43 includes an insertion block 60 and a telescopic spring 61. One end of the telescopic spring 61 is fixedly connected to the bottom surface of the insertion block 60, and the other end is fixedly connected to the upper end of the limiting rod 43. The telescopic structure 6 at the upper end of the limiting rod 51 has the same structure as the telescopic structure 6 at the upper end of the limiting rod 43. When the user pushes the push rod 44 upward, not only will the limiting rod 43 rise, but the limiting rod 51 will also rise together through the connection ring 50. At this time, if the limiting rod 43 is not inserted into the limiting port 40, then the limiting rod 51 arranged in a staggered manner with it will be inserted into the limiting port 40 to restrict the water flow control pipe 31. This makes it more convenient for the user to use the limiting structure 4. The setting of the telescopic structure 6 is to prevent the limiting rod 43 or the limiting rod 51 from not being inserted into the limiting port 40. When they abut against the bottom surface of the water flow control pipe 31, the telescopic spring 61 can be compressed to prevent the limiting rod 43 or the limiting rod 51 that is not inserted into the limiting port 40 from affecting the limiting rod 43 or the limiting rod 51 that can be inserted into the limiting port 40.

[0031] Although the setting of the limiting structure 4 improves the applicability and practicality of the protection structure 3, when the user uses the limiting structure 4, the push rod 44 needs to be continuously pushed, otherwise the push rod 44 will fall due to gravity, resulting in the limiting structure 4 being unable to limit the water flow control pipe 31. To solve this technical problem, in this embodiment, a support spring 45 for pushing the push rod 44 upward is provided on the bottom surface of the through port 42. One end of the support spring 45 is fixedly connected to the bottom surface of the push rod 44, and the other end is fixedly connected to the installation housing 1 at the bottom surface of the through port 42. Through the setting of the support spring 45, the user can restrict the water flow control pipe 31 without pushing the push rod 44 upward. When the water flow control pipe 31 needs to be rotated, only the push rod 44 needs to be pressed downward, and pressing downward is more labor-saving than the user pushing the push rod 44 upward.

[0032] Although the support spring 45 makes it easier for the user to use the limit structure 4, the user still needs to continuously contact the push rod 44, which is very unfavorable to the user experience. To solve this technical problem, in this embodiment, a fixing structure 7 for restricting the upward movement of the push rod 44 is provided in the middle of the through port 42. The fixing structure 7 includes two fixing plates 70 respectively arranged on both sides of the through port 42 and a fixing rod 71 passing through the two fixing plates 70 and inserted into the fixing plates 70. When the user needs to rotate the water flow control tube 31, the user only needs to press down the push rod 44 so that the push rod 44 is lower than the fixing plate 70, and then pass the fixing rod 71 through the two fixing plates 70. At this time, when the push rod 44 is pushed upward by the support spring 45, it will be blocked by the fixing rod 71, and the user needs to continuously press down the push rod 44. When the user needs to restrict the rotation of the water flow control tube 31, the user only needs to pull out the fixing rod 71 so that the fixing rod 71 no longer blocks the push rod 44. At this time, the support spring 45 can push the push rod 44 upward, so that the limiting rod 51 or the limit rod 43 restricts the rotation of the water flow control tube 31, improving the user experience.

[0033] Specific implementation process: When the user needs to rotate the water flow control tube 31, first press down the push rod 44 so that the push rod 44 is lower than the fixing plate 70, and then pass the fixing rod 71 through the two fixing plates 70 so that the fixing rod 71 blocks the upward movement of the push rod 44. Then start the pumping mechanism, and the pumping mechanism pumps the water in the storage tank through the water outlet 10 into the connecting pipe 20. At this time, the water flow contacts the spiral plate 32 on the water flow control tube 31 and rises along the spiral plate 32. At the same time, after the water flow contacts the spiral plate 32, due to the impact force of the water flow, it will also drive the water flow control tube 31 to rotate. The rotating water flow control tube 31 makes the water flow rise along the spiral plate 32 faster, and finally sprays out through the nozzle 21. At this time, because the water flow rises along the spiral plate 32 and sprays out from the nozzle 21, the water flow sprayed out by the nozzle 21 is a spiral water column. Therefore, the water column will not directly impact on the user's teeth, but will rotate and contact the user's teeth, so that the side of the water column contacts the user's teeth, thereby reducing the impact force of the water column on the user's teeth. And the residual rotational force of the water column after contacting the user's teeth will cause the part of the water column hitting the user's teeth to disperse, thereby comprehensively flushing the user's teeth.

[0034] When the user does not need the water flow control tube 31 to rotate, the user only needs to pull out the fixing rod 71 so that the fixing rod 71 no longer blocks the push rod 44.

[0035] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of the application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A water flow intensity control structure for a water flosser, characterized in that: The invention comprises a mounting shell (1), a water storage tank mounted at the bottom end of the mounting shell (1), a pumping mechanism mounted at the upper end of the mounting shell (1) and connected to the water storage tank, and a spraying mechanism (2) mounted on the upper end surface of the mounting shell (1) and connected to the pumping mechanism. The upper end surface of the mounting shell (1) is provided with a water outlet (10). The spraying mechanism (2) comprises a connecting pipe (20) mounted on the water outlet (10) and connected to the water outlet (10), and a spray head (21) mounted at the upper end of the connecting pipe (20). A protective structure (3) for reducing the impact of water flow on teeth is arranged in the connecting pipe (20). The water outlet (10) is connected to the output end of the pumping mechanism.

2. The water flow intensity control structure of a water flosser according to claim 1, characterized in that: The protective structure (3) comprises a cylindrical receiving groove (30) provided on the inner wall of the connecting pipe (20) and arranged along the height direction of the connecting pipe (20), a water flow control pipe (31) located in the cylindrical receiving groove (30) and rotatably connected to the connecting pipe (20) through the cylindrical receiving groove (30), and a spiral plate (32) fixedly provided on the inner wall of the water flow control pipe (31) along the height direction of the water flow control pipe (31).

3. The water flow intensity control structure of a water flosser according to claim 2, characterized in that: The bottom surface of the water flow control tube (31) is provided with a limiting structure (4) for limiting the rotation of the water flow control tube (31).

4. The water flow intensity control structure of a water flosser according to claim 3, characterized in that: The limiting structure (4) comprises a plurality of limiting openings (40) which are opened on the bottom surface of the water flow control tube (31) and are arranged in a circular array on the bottom surface of the water flow control tube (31) with the center of the water flow control tube (31) as a base point, a fixing opening (41) which is opened on the upper end surface of the installation shell (1) around the water outlet (10) and is opposite to the limiting opening (40), a through opening (42) which is opened on the outside of the installation shell (1) and is connected to the fixing opening (41), a limiting rod (43) inserted in the fixing opening (41), and a pushing rod (44) which has one end fixedly connected to the bottom end of the limiting rod (43) and the other end extending out of the installation shell (1) through the through opening (42).

5. The water flow intensity control structure of a water flosser according to claim 4, characterized in that: The water outlet (10) is provided with an annular connecting opening (11) which is opened on the upper end surface of the mounting shell (1) and communicates with the fixing opening (41); the annular connecting opening (11) surrounds the water outlet (10); and a connecting structure (5) is provided inside the annular connecting opening (11) for enabling the limiting structure (4) to quickly limit the water flow control pipe (31).

6. The water flow intensity control structure of a water flosser according to claim 5, characterized in that: The connection structure (5) comprises a connection ring (50) arranged in the annular connection opening (11) and fixedly connected at one end to the bottom end of the limiting rod (43), and a limiting rod (51) arranged at the other end of the connection ring (50); the limiting rod (51) and the limiting rod (43) are arranged alternately; and the upper ends of the limiting rods (51) and the limiting rods (43) are both provided with telescopic structures (6).

7. The water flow intensity control structure of a water flosser according to claim 6, characterized in that: The telescopic structure (6) at the upper end of the limiting rod (43) comprises an insertion block (60) and a telescopic spring (61); one end of the telescopic spring (61) is fixedly connected to the bottom surface of the insertion block (60), and the other end is fixedly connected to the upper end of the limiting rod (43); the telescopic structure (6) at the upper end of the limiting rod (51) has the same structure as the telescopic structure (6) at the upper end of the limiting rod (43).

8. The water flow intensity control structure of a water flosser according to claim 4, characterized in that: The bottom surface of the through opening (42) is provided with a support spring (45) for pushing the push rod (44) to move upwards; one end of the support spring (45) is fixedly connected to the bottom surface of the push rod (44), and the other end is located at the bottom surface of the through opening (42) and fixedly connected to the mounting housing (1).

9. The water flow intensity control structure of a water flosser according to claim 8, characterized in that: A fixing structure (7) for limiting the upward movement of the push rod (44) is provided in the middle of the through opening (42).

10. The water flow intensity control structure of a water flosser according to claim 9, characterized in that: The fixing structure (7) comprises two fixing plates (70) respectively arranged on both sides of the through-hole (42) and a fixing rod (71) passing through the two fixing plates (70) and plugged into the fixing plates (70).

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