Water pick

Abstract

The invention discloses an oral irrigator, which comprises a body provided with a nozzle; the piston mechanism comprises a piston cylinder body, a first piston piece and a second piston piece, a first piston chamber and a second piston chamber which are communicated to the spray head are arranged in the piston cylinder body, the first piston piece is movably arranged in the first piston chamber, and the second piston piece is movably arranged in the second piston chamber; the piston driving mechanism is connected to the first piston piece and the second piston piece and used for driving the first piston piece and the second piston piece to alternately reciprocate in the first piston chamber and the second piston chamber so as to extract water and convey the water to the spray head for continuous output. The oral irrigator can effectively reduce pulsation of water flow output by the spray head, so that the water flow is stably output, the cleaning effect is better, and the user experience is better.

Description

Technical Field

[0001] This invention relates to the field of oral irrigator technology, and more particularly to an oral irrigator. Background Technology

[0002] A water flosser is an oral care tool that uses high-pressure water to clean between teeth and along the gum line, helping to remove food debris and plaque that are difficult to reach with a toothbrush. In current technology, handheld water flossers typically use a single piston pump structure for water pumping. A motor drives a linkage via gears, which in turn pushes a piston reciprocating within a piston cylinder, drawing water from a tank and spraying it out through the nozzle.

[0003] However, the structure of this single-piston pump is prone to generating pulsating water flow during operation, resulting in intermittent high-pressure jets. This pulsating water flow may cause a stinging sensation in the user's mouth, especially for users with sensitive gums, leading to a poor user experience. Furthermore, the pulsating water flow also affects cleaning effectiveness, preventing the achievement of continuous and stable water pressure output and limiting the overall performance improvement of the oral irrigator. Summary of the Invention

[0004] This invention provides a water flosser that solves the problem that existing water flossers easily generate pulsating water flow during operation, affecting the user experience and cleaning effect.

[0005] This invention provides a dental flosser, comprising: The machine body is equipped with a nozzle; A piston mechanism includes a piston cylinder, a first piston member, and a second piston member. The piston cylinder has a first piston chamber and a second piston chamber that communicate with the nozzle. The first piston member is movably disposed in the first piston chamber, and the second piston member is movably disposed in the second piston chamber. A piston drive mechanism, connected to the first piston and the second piston, is used to drive the first piston and the second piston to reciprocate alternately in the first piston chamber and the second piston chamber, so as to draw water and deliver it to the nozzle for continuous output.

[0006] In the water flosser provided in this embodiment of the invention, the piston drive mechanism includes a drive assembly and a transmission assembly. The transmission assembly connects the first piston and the second piston, and the drive assembly connects to the transmission assembly. The drive assembly drives the transmission assembly to cause the first piston and the second piston to reciprocate alternately in the first piston chamber and the second piston chamber.

[0007] In the water flosser provided in this embodiment of the invention, the transmission assembly includes an eccentric wheel, a first connecting rod, and a second connecting rod. The eccentric wheel has a first eccentric shaft and a second eccentric shaft protruding from opposite sides along its axial direction. The first eccentric shaft and the second eccentric shaft are located at different positions on the same center line of the eccentric wheel. The eccentric wheel is rotatably mounted inside the body. The two ends of the first connecting rod are movably connected to the first piston and the first eccentric shaft, respectively. The two ends of the second connecting rod are movably connected to the second piston and the second eccentric shaft, respectively. The drive assembly is connected to the eccentric wheel to drive the eccentric wheel to rotate.

[0008] In the water flosser provided in this embodiment of the invention, the positions of the first eccentric shaft and the second eccentric shaft are symmetrically distributed about the center of the eccentric wheel.

[0009] In the water flosser provided in the embodiments of the present invention, the driving component includes a first motor and a first gear, and a second gear is provided on one side of the eccentric wheel in the axial direction. The first gear is fixed on the shaft of the first motor and meshes with the second gear.

[0010] The water flosser provided in this embodiment of the invention also includes a piston stroke adjustment mechanism. The piston stroke adjustment mechanism is located inside the body and connected to the eccentric wheel, and is used to drive the eccentric wheel to move closer to or away from the piston cylinder.

[0011] In the water flosser provided in this embodiment of the invention, the piston stroke adjustment mechanism includes a movable bracket and a stroke motor. The movable bracket is movably disposed inside the body, and the eccentric wheel is rotatably mounted on the movable bracket. The stroke motor is fixed inside the body and connected to the movable bracket. The stroke motor drives the movable bracket and the eccentric wheel to move synchronously to approach or move away from the piston cylinder.

[0012] In the water flosser provided in this embodiment of the invention, the piston stroke adjustment mechanism further includes a bearing, and a circular shaft portion protrudes from one side of the eccentric wheel along the axial direction and surrounds the shaft center. The outer ring of the bearing is fixed to the movable bracket, and the eccentric wheel is fixed to the inner ring of the bearing through the circular shaft portion.

[0013] In the water flosser provided in this embodiment of the invention, the piston stroke adjustment mechanism further includes a spring, which is connected between the movable bracket and the piston cylinder. When the movable bracket, together with the eccentric wheel, moves synchronously toward the piston cylinder, the spring is compressed.

[0014] The oral irrigator provided in this embodiment of the invention also includes a water tank for storing the water, the water tank being assembled in the body and communicating with the first piston chamber and the second piston chamber.

[0015] This invention provides a water flosser, comprising: a body with a nozzle; a piston mechanism including a piston cylinder, a first piston, and a second piston, wherein the piston cylinder has a first piston chamber and a second piston chamber connected to the nozzle, the first piston is movably disposed in the first piston chamber, and the second piston is movably disposed in the second piston chamber; and a piston drive mechanism connected to the first and second pistons, for driving the first and second pistons to reciprocate alternately within the first and second piston chambers to draw water and deliver it to the nozzle for continuous output. The water flosser of this application employs a dual-piston structure with alternating reciprocating operation, thereby effectively reducing the pulsation of the water flow output from the nozzle, ensuring a stable water flow, preventing stinging sensation in the user's mouth, improving the water flossing experience, producing better cleaning results, and enhancing the user experience. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a partial structural cross-sectional view of a water flosser provided in an embodiment of the present invention; Figure 2 A perspective view of a first piston component provided in an embodiment of the present invention; Figure 3 A perspective view of a second piston component provided in an embodiment of the present invention; Figure 4 This is a partial structural cross-sectional view of a water flosser provided in an embodiment of the present invention; Figure 5 A perspective view of the first link provided in an embodiment of the present invention; Figure 6 A perspective view of the second link provided in an embodiment of the present invention; Figure 7 A perspective view of an eccentric rotating wheel provided in an embodiment of the present invention; Figure 8 A perspective view of a first gear provided in an embodiment of the present invention; Figure 9 A partial structural cross-sectional view of a water flosser provided in another embodiment of the present invention; Figure 10 A partial structural cross-sectional view of a water flosser provided in another embodiment of the present invention; Figure 11 for Figure 9 Enlarged view of part A; Figure 12 for Figure 9 Enlarged view of part B.

[0018] The labels for the attached figures are as follows: 10. Body; 11. Nozzle; 20. Piston mechanism; 21. Piston cylinder; 201. First piston chamber; 202. Second piston chamber; 22. First piston component; 23. Second piston component; 30. Piston drive mechanism; 31. Drive assembly; 311. First motor; 312. First gear; 32. Transmission assembly; 321. Eccentric wheel; 301. First eccentric shaft; 302. Second eccentric shaft; 303. Second gear; 304. Round shaft; 305. Pin; 322. First connecting rod; 323. Second connecting rod; 40. Piston stroke adjustment mechanism; 41. Movable bracket; 42. Stroke motor; 43. Bearing; 44. Spring; 50. PCB board; 60. Battery. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The directional terms used in this invention, such as "up," "down," "front," "back," "left," "right," "inner," "outer," and "side," are merely for reference to the accompanying drawings. Therefore, the directional terms used are for illustrating and understanding this invention, and not for limiting it. Furthermore, in the drawings, structures that are similar or identical are indicated by the same reference numerals.

[0021] Reference Figures 1 to 12 This invention provides a water flosser, which can be referred to in detail below. Figures 1 to 4The water flosser includes: a body 10 with a nozzle 11; a piston mechanism 20 including a piston cylinder 21, a first piston member 22, and a second piston member 23, wherein the piston cylinder 21 has a first piston chamber 201 and a second piston chamber 202 connected to the nozzle 11, the first piston member 22 is movably disposed in the first piston chamber 201, and the second piston member 23 is movably disposed in the second piston chamber 202; and a piston drive mechanism 30 connected to the first piston member 22 and the second piston member 23, for driving the first piston member 22 and the second piston member 23 to reciprocate alternately in the first piston chamber 201 and the second piston chamber 202, so as to draw water and deliver it to the nozzle 11 for continuous output.

[0022] In specific implementation, the oral irrigator can be a handheld oral irrigator, mainly composed of a body 10, a piston mechanism 20, and a piston drive mechanism 30. Other components may include a PCB board 50, a battery 60, and a water tank. The body 10 serves as the base for mounting various components, including the PCB board 50, battery 60, and water tank, and is used by the user by gripping the body 10. A nozzle 11 is mounted on the body 10. The nozzle 11 is inserted into the oral cavity during use; it has a tubular structure, and water is output from its end for cleaning. The piston mechanism 20 is entirely housed inside the body 10. Specifically, the piston mechanism 20 consists of a piston cylinder 21, a first piston member 22, and a second piston member 23. The piston cylinder 21 contains two chambers: a first piston chamber 201 and a second piston chamber 202. Both the first piston chamber 201 and the second piston chamber 202 are connected to the nozzle 11. The first piston member 22 is movably disposed in the first piston chamber 201, cooperating with the first piston chamber 201 to form a piston structure. The second piston member 23 is movably disposed in the second piston chamber 202, cooperating with the second piston chamber 202 to form another piston structure. The first piston chamber 201 and the second piston chamber 202 obtain water for cleaning by connecting to a water tank. The movement of the first piston 22 and the second piston 23 is achieved by a piston drive mechanism 30. The piston drive mechanism 30 is located in the body 10 and connected to the first piston 22 and the second piston 23. It drives the first piston 22 and the second piston 23 to move alternately and reciprocally within the first piston chamber 201 and the second piston chamber 202, causing the first piston chamber 201 and the second piston chamber 202 to draw water and deliver it to the nozzle 11 for continuous output. Specifically, while the piston drive mechanism 30 drives the first piston 22 to draw water in conjunction with the first piston chamber 201, it also drives the second piston 23 to compress the water into the nozzle 11 for output. Conversely, when the piston drive mechanism 30 drives the second piston 23 to draw water in conjunction with the second piston chamber 202, it again drives the first piston 22 to compress the water into the nozzle 11 for output. This cyclical operation ensures a continuous and stable water flow from the nozzle 11, reducing the pulsation effect of the water flow output from the nozzle 11. When used, the stable water flow will not cause a stinging sensation in the user's mouth, making it suitable for people with sensitive gums. It improves the oral rinsing experience, and the continuous and stable water flow can produce better cleaning results, enhancing the user experience.

[0023] In one embodiment, reference is made to Figure 1 and Figure 4The piston drive mechanism 30 includes a drive assembly 31 and a transmission assembly 32. The transmission assembly 32 connects the first piston member 22 and the second piston member 23. The drive assembly 31 connects to the transmission assembly 32. The drive assembly 31 drives the transmission assembly 32 to cause the first piston member 22 and the second piston member 23 to reciprocate alternately in the first piston chamber 201 and the second piston chamber 202.

[0024] In specific implementation, the piston drive mechanism 30 mainly consists of a drive assembly 31 and a transmission assembly 32. The transmission assembly 32 is connected to both the first piston 22 and the second piston 23, while the drive assembly 31 is connected to the transmission assembly 32. In specific applications, the drive assembly 31 is controlled and driven by the PCB board 50. The drive assembly 31, in cooperation with the transmission assembly 32, drives the first piston 22 and the second piston 23 to reciprocate alternately within the first piston chamber 201 and the second piston chamber 202. That is, while the drive assembly 31 drives the transmission assembly 32 to advance the first piston 22 into the first piston chamber 201, the transmission assembly 32 drives the second piston 23 to retract into the second piston chamber 202. Conversely, while the drive assembly 31 drives the transmission assembly 32 to retract the first piston 22 into the first piston chamber 201, the transmission assembly 32 drives the second piston 23 to advance into the second piston chamber 202. This cycle repeats, alternately drawing water and delivering it to the nozzle 11, enabling the nozzle 11 to output a continuous and stable water flow.

[0025] Furthermore, referring to Figures 4 to 7 The transmission assembly 32 includes an eccentric wheel 321, a first connecting rod 322, and a second connecting rod 323. The eccentric wheel 321 has a first eccentric shaft 301 and a second eccentric shaft 302 protruding from opposite sides along its axial direction. The first eccentric shaft 301 and the second eccentric shaft 302 are located at different positions on the same center line of the eccentric wheel 321. The eccentric wheel 321 is rotatably mounted inside the body 10. The two ends of the first connecting rod 322 are movably connected to the first piston 22 and the first eccentric shaft 301, respectively. The two ends of the second connecting rod 323 are movably connected to the second piston 23 and the second eccentric shaft 302, respectively. The drive assembly 31 is connected to the eccentric wheel 321 to drive the eccentric wheel 321 to rotate.

[0026] In specific implementation, the transmission assembly 32 mainly consists of an eccentric wheel 321, a first connecting rod 322, and a second connecting rod 323. The eccentric wheel 321 has a disc structure and is rotatably mounted inside the machine body 10, allowing it to rotate relative to the machine body 10. The axis of the eccentric wheel is horizontally positioned. Specifically, a pin 305 passes through the center of the eccentric wheel 321, and the pin 305 is horizontally positioned within the machine body 10. The eccentric wheel 321 is rotatably connected to the machine body 10 via the pin 305. On opposite sides of the eccentric wheel 321 along the axial direction, there are respectively a first eccentric shaft 301 and a second eccentric shaft 302 that are off-center. The first eccentric shaft 301 is a shaft structure protruding on one side of the eccentric wheel along the axial direction and has a certain distance from the axis of the eccentric wheel. The second eccentric shaft 302 is a shaft structure protruding on the other side of the eccentric wheel along the axial direction and also has a certain distance from the axis of the eccentric wheel. The first eccentric shaft 301 and the second eccentric shaft 302 are located at different radial positions on the eccentric wheel. The first connecting rod 322 and the second connecting rod 323 have the same connecting rod structure. Both ends of the first connecting rod 322 are movably connected to the first piston 22 and the first eccentric shaft 301, respectively, specifically through a rotatable connection; that is, one end of the first connecting rod 322 is rotatably connected to the first piston 22, and the other end is rotatably connected to the first eccentric shaft 301. Similarly, both ends of the second connecting rod 323 are movably connected to the second piston 23 and the second eccentric shaft 302, respectively, specifically through a rotatable connection; that is, one end of the second connecting rod 323 is rotatably connected to the second piston 23, and the other end is rotatably connected to the second eccentric shaft 302. The two ends of the first connecting rod 322 are movably connected to the first piston 22 and the first rotating shaft through corresponding movable connection structures, and the two ends of the second connecting rod 323 are also movably connected to the second piston 23 and the second rotating shaft through corresponding movable connection structures. The drive assembly 31 is connected to the eccentric wheel 321 and can drive the eccentric wheel 321 to rotate. Specifically, when the drive assembly 31 drives the eccentric wheel 321 to rotate, since the first eccentric shaft 301 and the second eccentric shaft 302 are eccentrically designed, they will drive the first connecting rod 322 and the second connecting rod 323 to perform eccentric motion. As a result, the first connecting rod 322 drives the first piston 22 to reciprocate in the first piston chamber 201, and the second connecting rod 323 drives the second piston 23 to reciprocate in the second piston chamber 202. The stroke of the first piston 22 and the second piston 23 is related to the degree of eccentricity of the first eccentric shaft 301 and the second eccentric shaft 302. That is, the farther the first eccentric shaft 301 and the second eccentric shaft 302 are from the axis of the eccentric wheel, the longer the stroke of the first piston 22 and the second piston 23 in the first piston chamber 201 and the second piston chamber 202. In practical applications, the drive component 31 drives the eccentric wheel 321 to rotate continuously, which in turn drives the first piston 22 and the second piston 23 to perform precise and stable alternating reciprocating motion, thereby achieving alternating water extraction and continuous and stable output through the nozzle 11.

[0027] Furthermore, referring to Figure 4 and Figure 7 The positions of the first eccentric shaft 301 and the second eccentric shaft 302 are symmetrically distributed about the center of the eccentric wheel 321.

[0028] In specific implementation, the positions of the first eccentric shaft 301 and the second eccentric shaft 302 are symmetrically distributed about the center of the eccentric wheel 321, so that the distance from the first eccentric shaft 301 to the axis of the eccentric wheel 321 is the same as the distance from the second eccentric shaft 302 to the axis of the eccentric wheel 321. Therefore, the degree of eccentricity of the first eccentric shaft 301 and the second eccentric shaft 302 on the eccentric wheel 321 is the same. In practical applications, the drive assembly 31 drives the eccentric wheel 321 to rotate continuously, which in turn drives the first piston 22 and the second piston 23 to move alternately and reciprocate with the same distance, alternately drawing out equal amounts of water and continuously outputting it through the nozzle 11, making the water flow output from the nozzle 11 more stable.

[0029] In one embodiment, reference is made to Figure 4 , Figure 7 as well as Figure 8 The drive assembly 31 includes a first motor 311 and a first gear 312. A second gear 303 is provided on one side of the eccentric wheel 321 in the axial direction. The first gear 312 is fixed on the shaft of the first motor 311 and meshes with the second gear 303.

[0030] In specific implementation, the drive assembly 31 mainly consists of a first motor 311 and a first gear 312. The first motor 311 can be a servo motor with a rotating shaft. The first gear 312 is a spur gear structure and is fixed on the rotating shaft of the first motor 311, rotating synchronously with the rotating shaft of the first motor 311. A second gear 303 is provided on one side of the eccentric wheel 321 along its axial direction. The second gear 303 is a face gear structure and is arranged around the axis of the eccentric wheel 321. The first gear 312 fixed on the rotating shaft of the first motor 311 meshes with the second gear 303, so that when the first motor 311 drives the rotating shaft to rotate, it drives the second gear 303 to rotate, thereby driving the eccentric wheel 321 to rotate.

[0031] In one embodiment, reference is made to Figures 9 to 12 It also includes a piston stroke adjustment mechanism 40, which is located inside the body 10 and connected to the eccentric wheel 321, and is used to drive the eccentric wheel 321 to move closer to or away from the piston cylinder 21.

[0032] In a specific implementation, the dental flosser also includes a piston stroke adjustment mechanism 40, which is located inside the body 10 and connected to the eccentric wheel 321. The piston stroke adjustment mechanism 40 is used to drive the eccentric wheel 321 closer to or further away from the piston cylinder 21 to adjust the piston stroke. Specifically, since the lengths of the first connecting rod 322 and the second connecting rod 323 are fixed, when the eccentric wheel 321 is driven closer to the piston cylinder 21 by the piston stroke adjustment mechanism 40, the first piston 22 and the second piston 23 move deeper into the first piston chamber 201 and the second piston chamber 202 respectively. When the first piston 22 and the second piston 23 reciprocate, the water pumping space of the first piston chamber 201 and the second piston chamber 202 increases while the drainage space decreases, thereby increasing the water pressure of the nozzle 11. When the eccentric wheel 321 is driven away from the piston cylinder 21 by the piston stroke adjustment mechanism 40, the first piston 22 and the second piston 23 move towards the inlet of the first piston chamber 201 and the second piston chamber 202 respectively. When the first piston 22 and the second piston 23 reciprocate, the water pumping space of the first piston chamber 201 and the second piston chamber 202 decreases while the drainage space increases, thereby decreasing the water pressure of the nozzle 11. Therefore, in practical applications, by driving the eccentric wheel 321 closer to or further away from the piston cylinder 21 through the piston stroke adjustment mechanism 40, the output water pressure of the nozzle 11 can be adjusted to meet the different water pressure requirements of users.

[0033] Furthermore, referring to Figures 9 to 11 The piston stroke adjustment mechanism 40 includes a movable bracket 41 and a stroke motor 42. The movable bracket 41 is movably disposed inside the machine body 10. The eccentric wheel 321 is rotatably mounted on the movable bracket 41. The stroke motor 42 is fixed inside the machine body 10 and connected to the movable bracket 41. The stroke motor 42 drives the movable bracket 41 and the eccentric wheel 321 to move synchronously closer to or further away from the piston cylinder 21.

[0034] In practical implementation, the piston stroke adjustment mechanism 40 includes a movable support 41 and a stroke motor 42. The movable support 41 is movably disposed inside the machine body 10 and can move up and down within the machine body 10. An eccentric wheel 321 is rotatably mounted on the movable support 41 and can rotate independently relative to the movable support 41. The stroke motor 42 is fixed inside the machine body 10 and connected to the movable support 41, specifically, the drive shaft of the stroke motor 42 is fixed to the movable support 41, and the stroke motor 42 can realize the extension and retraction control of the drive shaft. In practical applications, the stroke motor 42 can drive the movable support 41 and the eccentric wheel 321 to move synchronously, so that the eccentric wheel moves closer to or away from the piston cylinder 21 without affecting the normal operation of the eccentric wheel 321, thereby realizing the adjustment of the piston stroke.

[0035] Furthermore, referring to Figures 9 to 11 The piston stroke adjustment mechanism 40 also includes a bearing 43. The eccentric wheel 321 has a circular shaft portion 304 protruding on one side of the axial direction and surrounding the shaft. The outer ring of the bearing 43 is fixed to the movable bracket 41. The eccentric wheel 321 is fixed to the inner ring of the bearing 43 through the circular shaft portion 304.

[0036] In specific implementation, the piston stroke adjustment mechanism 40 also includes a bearing 43, which has an inner and outer ring structure. The inner and outer rings can rotate relative to each other, and the outer ring of the bearing 43 is fixed on the movable bracket 41. A circular shaft portion 304 protrudes from one axial side of the eccentric wheel 321, surrounding the axis of the eccentric wheel 321. The eccentric wheel 321 is fixed to the inner ring of the bearing 43 via the circular shaft portion 304, allowing the eccentric wheel 321 to rotate synchronously with the inner ring of the bearing 43. Since the outer ring of the bearing 43 is fixed to the movable bracket 41, the eccentric wheel 321 as a whole can rotate relative to the movable bracket 41, and the rotation is more stable.

[0037] Furthermore, referring to Figure 9 and Figure 12 The piston stroke adjustment mechanism 40 also includes a spring 44, which is connected between the movable bracket 41 and the piston cylinder 21. When the movable bracket 41 and the eccentric wheel 321 move synchronously closer to the piston cylinder 21, the spring 44 is compressed.

[0038] In specific implementation, the piston stroke adjustment mechanism 40 also includes a spring 44. The spring 44 is integrally connected between the movable bracket 41 and the piston cylinder 21 inside the machine body 10. Specifically, one end of the spring 44 abuts against the upper end of the movable bracket 41, and the other end of the spring 44 abuts against the front end of the piston cylinder. When the movable bracket 41, together with the eccentric wheel 321, moves synchronously closer to the piston cylinder 21, the spring 44 is compressed by the pressure. The compressed spring 44 generates elastic force, causing the movable bracket 41 to tend to move back, forming an elastic buffer. This facilitates the adjustment of the piston stroke by the stroke motor 42 and prevents the sudden action of the stroke motor 42 from affecting the coordination between various components.

[0039] In one embodiment, a water tank (not shown) for storing the water is also included, the water tank being assembled to the body 10 and communicating with the first piston chamber 201 and the second piston chamber 202.

[0040] In practice, the oral irrigator also includes a water tank, which is mounted on the body 10. The water tank stores water for cleaning, and the connection between the water tank and the body 10 can be detachable. Specifically, the interior of the water tank is connected to the first piston chamber 201 and the second piston chamber 202 via pipes, specifically to the cavity portion that the first piston member 22 and the second piston member 23 cannot reach, thereby providing water for the engagement of the first piston member 22 with the first piston chamber 201 and the second piston member 23 with the second piston chamber 202.

[0041] In summary, the oral irrigator provided in this embodiment of the invention adopts a dual-piston structure that works in a reciprocating alternating manner, thereby effectively reducing the pulsation of the water flow output from the nozzle, ensuring a stable water flow output, preventing stinging sensation in the user's mouth, improving the oral irrigator experience, producing better cleaning results, and enhancing the user experience.

[0042] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A dental flosser, characterized in that, include: The machine body is equipped with a nozzle; A piston mechanism includes a piston cylinder, a first piston member, and a second piston member. The piston cylinder has a first piston chamber and a second piston chamber that communicate with the nozzle. The first piston member is movably disposed in the first piston chamber, and the second piston member is movably disposed in the second piston chamber. A piston drive mechanism, connected to the first piston and the second piston, is used to drive the first piston and the second piston to reciprocate alternately in the first piston chamber and the second piston chamber, so as to draw water and deliver it to the nozzle for continuous output.

2. The oral irrigator according to claim 1, characterized in that, The piston drive mechanism includes a drive assembly and a transmission assembly. The transmission assembly connects the first piston and the second piston, and the drive assembly connects to the transmission assembly. The drive assembly drives the transmission assembly to cause the first piston and the second piston to reciprocate alternately within the first piston chamber and the second piston chamber.

3. The oral irrigator according to claim 2, characterized in that, The transmission assembly includes an eccentric wheel, a first connecting rod, and a second connecting rod. The eccentric wheel has a first eccentric shaft and a second eccentric shaft protruding from opposite sides along its axial direction. The first eccentric shaft and the second eccentric shaft are located at different positions on the same center line of the eccentric wheel. The eccentric wheel is rotatably mounted inside the machine body. The two ends of the first connecting rod are movably connected to the first piston and the first eccentric shaft, respectively. The two ends of the second connecting rod are movably connected to the second piston and the second eccentric shaft, respectively. The drive assembly is connected to the eccentric wheel to drive its rotation.

4. The oral irrigator according to claim 3, characterized in that, The positions of the first eccentric shaft and the second eccentric shaft are symmetrically distributed about the center of the eccentric wheel.

5. The oral irrigator according to claim 3, characterized in that, The drive assembly includes a first motor and a first gear. A second gear is provided on one side of the eccentric wheel along the axial direction. The first gear is fixed on the shaft of the first motor and meshes with the second gear.

6. The oral irrigator according to claim 3, characterized in that, It also includes a piston stroke adjustment mechanism, which is located inside the machine body and connected to the eccentric wheel, and is used to drive the eccentric wheel to move closer to or away from the piston cylinder.

7. The oral irrigator according to claim 6, characterized in that, The piston stroke adjustment mechanism includes a movable bracket and a stroke motor. The movable bracket is movably disposed inside the machine body. The eccentric wheel is rotatably mounted on the movable bracket. The stroke motor is fixed inside the machine body and connected to the movable bracket. The stroke motor drives the movable bracket and the eccentric wheel to move synchronously to approach or move away from the piston cylinder.

8. The oral irrigator according to claim 7, characterized in that, The piston stroke adjustment mechanism also includes a bearing. One side of the eccentric wheel is provided with a circular shaft portion that surrounds the axis. The outer ring of the bearing is fixed to the movable bracket. The eccentric wheel is fixed to the inner ring of the bearing through the circular shaft portion.

9. The oral irrigator according to claim 7, characterized in that, The piston stroke adjustment mechanism also includes a spring connected between the movable bracket and the piston cylinder. When the movable bracket, together with the eccentric wheel, moves synchronously toward the piston cylinder, the spring is compressed.

10. The oral irrigator according to any one of claims 1-9, characterized in that, It also includes a water tank for storing the water, the water tank being assembled to the body and communicating with the first piston chamber and the second piston chamber.

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