Oral irrigator with differential pressure ventilation system

Abstract

The oral irrigator with the differential pressure ventilation system comprises a spray head, a spray gun, a control handle, a container, a waterway system and the differential pressure ventilation system. The waterway system comprises a water inlet system and a water outlet system, and a water inlet mechanism is arranged at the top of the water inlet system and comprises a water inlet, a side wall and a water outlet; a vent hole is formed in the side wall, and the horizontal height of the upper end face of the vent hole is larger than the height of the water outlet face of the water outlet, so that pressure difference is formed, gas can flow from the high pressure position to the low pressure position, a pressure difference ventilation system is formed, and it is guaranteed that gas flows in the water injection, use and pouring processes; and the phenomenon of unsmooth water flow in the water injection, use and water pouring processes caused by the internal and external pressure difference of the oral irrigator with the pressure difference ventilation system is avoided. The water inlet mechanism is arranged in the water inlet channel, the external structure cannot be damaged, the integrity and the sealing performance of the external structure of the oral irrigator with the differential pressure ventilation system can be kept, and the liquid seepage phenomenon in the using process is avoided.

Description

Technical Field

[0001] This invention relates to an oral hygiene tool, and more particularly to a dental flosser with a differential pressure ventilation system for cleaning teeth, interdental spaces and the oral cavity. Background Technology

[0002] Due to aging, pathological reasons, and other factors, gum recession and widening of the gaps between teeth are common, making it easy for food to get stuck. If not cleaned in time, this can lead to bad breath and various dental and oral diseases, especially periodontitis.

[0003] In response to this situation, various dental floss, interdental brushes, and water flossers have been developed and are available on the market for users to choose from. Water flossers, in particular, utilize the impact force of a high-speed jet of water under pressure to clean teeth and the oral cavity. Due to their ease of use and effective cleaning, they are currently the most widely used oral hygiene products on the market.

[0004] With increasing emphasis on oral hygiene, carrying a water flosser has gradually become a daily cleaning habit. To reduce product size, pull-out retractable water flossers are currently the most common storage method. These typically feature a sliding rail on the handle; sliding the handle back and forth along the rail allows the device to be retracted into or pulled out of the water tank. To prevent leaks during use, a sealing device is usually designed. However, this sealing device can prevent the air trapped inside the water tank from escaping properly, causing problems with water filling and drainage. Therefore, an air venting system is a crucial component of this type of water flosser.

[0005] Currently, most venting mechanisms are located at the connection between the main unit and the water tank. This design often leads to liquid leakage during use. Therefore, this application designs a special differential pressure venting structure that ensures ventilation while preventing liquid from seeping out of the vent during use. Summary of the Invention

[0006] The oral irrigator of the present invention with a differential pressure ventilation system forms a differential pressure ventilation system through the pressure difference between the vent and the minimum inlet level. Since the differential pressure ventilation system is set in the water injection channel, the integrity of the external structure can be well maintained, thereby ensuring the ventilation effect while effectively preventing liquid leakage during use.

[0007] The oral irrigator of the present invention with a differential pressure ventilation system is characterized in that: the oral irrigator 100 with a differential pressure ventilation system includes a nozzle 1, a spray gun 2, a control handle 3, a container 4, a water system 5, and a differential pressure ventilation system 3-4;

[0008] A. The nozzle 1 is located at the front end of the spray gun 2; the control handle 3 can control the spraying of fluid in the spray gun 2;

[0009] B. The container 4 includes a base 41 and a side wall 42, and the container 4 is movably or detachably connected to the control handle 3; the water system 5 includes a water inlet system 51 and a water outlet system 52; the fluid in the container 4 is connected to the spray gun 2 through the water system 5;

[0010] C. The top of the water inlet system 51 is provided with a water inlet mechanism 51-1, which includes an inlet 51-11, a side wall 51-12, and an outlet 51-13. The inlet 51-11 is located at the top of the water inlet mechanism 51-1 and communicates with the outside, allowing liquid to be injected into the water inlet mechanism 51-1. The outlet 51-13 is located at the bottom of the water inlet mechanism 51-1. Liquid injected through the inlet 51-11 flows into the water inlet system 51 through the outlet 51-13 and then into the container 4. The side wall 51-12 is provided with a vent 51-12-1. The upper end face L3 of the vent 51-12-1 is higher than the outlet surface L1 of the outlet 51-13. The upper end face L3 is connected to the outlet surface L1 of the outlet 51-13. A pressure difference is formed between the water surfaces L1, constituting the differential pressure ventilation system 3-4. When liquid is injected into the container (4), the vent 51-12-1 is higher than the outlet 51-13, and the air in the oral irrigator 100 with the differential pressure ventilation system can be discharged from the vent 51-12-1, ensuring the smooth progress of the water injection process. When rinsing, the liquid in the container 4 is connected to the spray gun 2 through the water outlet system 52 and rinses the oral cavity through the nozzle 1. When the liquid in the container 4 is discharged, the vent 51-12-1 is lower than the outlet 51-13, and external air enters the oral irrigator 100 with the differential pressure ventilation system through the vent 51-12-1. Under the action of air pressure, the liquid in the container 4 is discharged smoothly.

[0011] The oral irrigator of the present invention with a differential pressure ventilation system utilizes the height difference between the water outlet surface L1 and the upper end surface L3 of the vent hole 51-12-1 to form a pressure difference, thereby enabling gas to flow from the high pressure area to the low pressure area. When liquid is injected into the container 4, the upper end face L3 is higher than the water outlet face L1. The air in the water flosser 100 with the differential pressure ventilation system can be discharged from the vent 51-12-1, preventing the liquid from being unable to be smoothly injected into the container 4 due to excessive compressed air pressure caused by the inability to be discharged in time, thus ensuring the smooth progress of the water injection process. During rinsing, the liquid in the container 4 is connected to the spray gun 2 through the water outlet system 52 and rinses the oral cavity through the nozzle 1. When it is necessary to quickly pour out the liquid in the container 4, the upper end face L3 is lower than the water outlet face L1. Under the action of pressure difference, external air can continuously enter the water flosser 100 with the differential pressure ventilation system through the vent 51-12-1, ensuring the balance of internal and external pressure, so that the liquid in the container 4 can be smoothly discharged. Since the water inlet mechanism 51-1 can be located inside the water inlet channel, the vent 51-12-1 can be designed to be large in size as needed to achieve a greater pressure difference and better ventilation effect, while not damaging the external structure. This can well maintain the integrity and sealing of the external structure of the water flosser with pressure difference ventilation system of the present invention, thereby effectively avoiding liquid leakage that may occur if the ventilation structure is located on the outside of the product while ensuring the ventilation effect.

[0012] The side wall 51-12 is provided with a shielding mechanism 51-12-2 above the vent 51-12-1. The shielding mechanism 51-12-2 can shield the vent 51-12-1 during water injection to prevent liquid from entering the vent 51-12-1, thereby better ensuring the normal operation of the differential pressure ventilation system 3-4.

[0013] The shielding mechanism 51-12-2 is a water-blocking protrusion 51-12-21. The shielding mechanism 51-12-2 can be a water-blocking protrusion 51-12-21 integrally injection molded on the side wall 51-12, or it can be other shielding mechanisms. The applicant will not give specific examples here, but they do not depart from the protection scope of this application.

[0014] The top of the water inlet mechanism 51-1 is equipped with a cap 51-14. The cap 51-14 provides good dust protection, maintaining the cleanliness of the oral irrigator with the differential pressure ventilation system. The channel of the water inlet system 51 forms a storage cavity for the nozzle 2. During use, the cap 51-14 is opened, the nozzle 2 is removed, and connected to the control handle 3. Water is then injected into the container 4 via the water inlet mechanism 51-1. After injection, the cap 51-14 is closed, and normal oral rinsing and cleaning can be performed. After use, the nozzle 2 is removed from the storage handle 3, placed into the channel of the water inlet system 51, and the cap 51-14 is closed for storage.

[0015] The base 41 is detachably mounted on the bottom of the side wall 42. The base 41 and the side wall 42 are detachably connected; therefore, when the base 41 is removed from the side wall 42, the control handle 3 can be removed from the side wall 42, allowing the control handle 3 to be separated from the container 4. This enables separate cleaning of the control handle 3 and the container 4, effectively overcoming the problem of inconvenient disassembly and cleaning difficulties in existing retractable oral irrigators.

[0016] The base 41 is provided with a positioning pin 41-1, and the water outlet system 52 is detachably installed and fixed on the positioning pin 41-1.

[0017] The positioning pin 41-1 is provided with a water passage 41-11. When the water system 5 is installed on the positioning pin 41-1, the fluid in the container 4 can enter the water system 5 through the water passage 41-11. The detachable installation method allows the water system 5 to be detached from the positioning pin 41-11 after the base 41 is separated from the side wall 42, thereby enabling the water system 5 to be cleaned.

[0018] The oral irrigator 100 with differential pressure ventilation system also includes a telescopic mechanism 304, and the container 4 is movably connected to the control handle 3 via the telescopic mechanism 304. The control handle 3 can move along the side wall 42 of the container 4, thus forming the telescopic mechanism 304.

[0019] The telescopic mechanism 304 includes a positioning mechanism 304-1. Typically, the positioning mechanism 304-1 is located on the upper inner side of the side wall 42, and the positioning mechanism 304-1 creates a positioning engagement between the side wall 42 and the connecting seat 31-2 of the housing 31. When the connecting seat 31-1 moves to the positioning mechanism 304-1, the positioning mechanism 304-1 locks and fixes the control handle 3, preventing the control handle 3 from moving during use.

[0020] The positioning mechanism 304-1 is an interference fit positioning mechanism, and / or a threaded positioning mechanism, and / or a convex-concave locking positioning mechanism.

[0021] The positioning mechanism 304-1 is a convex-concave card-fitting positioning mechanism 304-11.

[0022] The convex-concave locking positioning mechanism 304-11 is composed of a positioning groove 31-1 located on the outside of the housing 31 of the control handle 3 and a positioning protrusion 42-1 located on the inside of the side wall 42 of the container 4.

[0023] The applicant has only provided specific examples of the convex-concave card and positioning mechanism. In practical applications, those skilled in the art can design different positioning methods as needed. The applicant will not provide specific examples of each method, but none of them will depart from the scope of protection of this application.

[0024] The oral irrigator 100 with the differential pressure ventilation system also includes a water pressure regulating mechanism 6. The water pressure regulating mechanism 6 can adjust the fluid pressure in the spray gun 2.

[0025] The water pressure regulating mechanism 6 is a ring-shaped water pressure regulating device 601, which includes a pressure regulating device 61, an indicating device 62, and a ring-shaped water pressure display device 63. The ring-shaped water pressure display device 63 can display the fluid pressure. The pressure regulating device 61 can adjust the fluid pressure emitted by the spray gun 2, while the indicating device 62 can display the fluid pressure on the ring-shaped water pressure display device 63 through lights, numerical values, or other means. The indicating device 62 can be an indicator light, a pressure setting number, a fluid pressure value, or other similar methods. The ring-shaped water pressure display device 63 can be in various forms, such as a ring-shaped light-transmitting window, a ring-shaped light strip, or a ring-shaped digital strip, and the fluid pressure is visually displayed by the number of lit light-transmitting windows, the brightness of the ring-shaped light strip, or the numbers displayed on the ring-shaped digital strip.

[0026] Since the annular water pressure display device 63 can be configured as a hollow annular strip, and the pressure regulating device 61 can be located in the middle of the annular area formed by the annular water pressure display device 63, forming a whole, when the pressure regulating device 61 is adjusted, the annular water pressure display device 63 located around the pressure regulating device 61 can display the magnitude of the fluid pressure very intuitively, making observation very convenient.

[0027] The annular water pressure regulating device 601 is either a stepless annular water pressure regulating device or a graded annular water pressure regulating device 6-1. The stepless annular water pressure regulating device can continuously adjust the water pressure emitted by the spray gun 2, meeting all water pressure requirements. The graded annular water pressure regulating device 6-1 can adjust the water pressure in stages according to set standards, making operation simpler.

[0028] The pressure regulating device 61 includes a control chip 61-1 and a gear button 61-2. The indicating device 62 is an indicator light 62-1. The annular water pressure display device 63 includes an annular light-transmitting window 63-1 and a light-shielding partition 63-2. The gear button 61-2 is located in the middle of the annular ring formed by the annular light-transmitting window 63-1. When the gear button 61-2 is pressed, the indicator lights 62-1 light up sequentially and shine through the annular light-transmitting window 63-1 to display the fluid pressure.

[0029] The indicator lights 62-1 and the annular light-transmitting window 63-1 are set according to the number of gears corresponding to the gear buttons 61-2, and each indicator light 62-1 is sequentially placed below the corresponding annular light-transmitting window 63-1.

[0030] A separate water outlet control switch 32 can be installed on the housing 31 of the control handle 3. When the water outlet control switch 32 is pressed, the spray gun 2 sprays water. When the water outlet control switch 32 is released, the spray gun 2 stops spraying water.

[0031] When in use, pressing and holding the gear button 61-2 activates the oral irrigator 100 with the differential pressure ventilation system. Pressing the gear button 61-2 once illuminates one indicator light 62-1, which shines through the corresponding annular light-transmitting window 63-1. Due to the light-shielding partition 63-2, it does not affect adjacent annular light-transmitting windows 63-1. Pressing the gear button 61-2 sequentially increases the fluid pressure, and the indicator lights 62-1 illuminate sequentially. When all indicator lights 62-1 are illuminated, pressing the gear button 61-2 again restores the fluid pressure to the set initial fluid pressure, leaving only one indicator light 62-1 still illuminated, restarting the fluid pressure adjustment cycle.

[0032] After selecting the appropriate fluid pressure, press the water outlet control switch 32, and the spray gun 2 will spray fluid at the selected fluid pressure to clean the oral cavity. Release the water outlet control switch 32, and the spray gun 2 will stop spraying fluid. The process is very convenient.

[0033] The dental irrigator 100 with an annular water pressure regulating device is turned off only when the gear button 61-2 is pressed and held again.

[0034] Since the water outlet control switch 32 and the water pressure regulating device 6 need to be turned on simultaneously for the spray gun 2 to work, accidental activation can be effectively avoided, thus better preventing accidental injury to the user, especially to the eyes and other parts of the body.

[0035] The applicant has only provided specific examples of the gear shift button, indicator light, and light-transmitting window used in conjunction with this type of annular pressure regulating device. In practical applications, those skilled in the art can also use rotary stepless speed regulating devices, touch control switches, and other combinations of light intensity, digital display, etc., to achieve the purpose of annular pressure regulation as described in this application, as needed. The applicant will not provide specific examples here, but none of them depart from the scope of protection of this application.

[0036] The pressure regulating device 61 regulates signals such as voltage, current, power, frequency, or waveform. Only the signals mentioned above are listed here, but those skilled in the art can adjust other signals as needed to regulate the fluid pressure, without departing from the scope of this application.

[0037] The oral irrigator 100 with a differential pressure ventilation system includes a water suction device 7; the water suction device 7 can draw the fluid in the container 4 into the spray gun 2 through the water system 5 and then spray it out from the nozzle 1.

[0038] The water suction device 7 is an electric water suction device 71; the oral irrigator 100 with a differential pressure ventilation system includes a power supply system 8 and a circuit system 9; the electric water suction device 71 includes a water inlet system 71-1, a motor 71-2, and a water outlet system 71-3; the water suction device 7 is connected to the power supply system 8 through the circuit system 9. Under the action of the power supply system 8, the motor 71-2 works, and the liquid in the container 4 is sucked into the electric water suction device 71 through the water system 5 and then sprayed out from the water outlet system 71-3. The sprayed fluid is then sprayed out from the spray gun 2 through the water system 5.

[0039] The pressure regulating device 61, the indicating device 62, and the control switch 3 are also connected together through the circuit system 9 and the power supply system 8. The circuit 9 is equipped with a power indicator light 91, which can display the power status of the power supply system 8 through color changes.

[0040] The pressure regulating device 61 can control the rotational speed of the motor 71-2. Adjusting the output signal of the pressure regulating device 61 can adjust the rotational speed of the motor 71-2, thereby adjusting the pressure of the fluid ejected from the nozzle 1.

[0041] The applicant has only listed one spray gun working method, electric water suction. In practical applications, those skilled in the art can design different spray gun working methods as needed. The applicant will not give examples of them all, but none of them will depart from the protection scope of this application.

[0042] In use, pull the control handle 3 out of the container 4, open the cover 51-14, take out the nozzle 2, connect it to the control handle 3, and inject water into the container 4 through the water inlet mechanism 51-1. After the water is injected, close the cover 51-14, press and hold the gear button 61-2 to turn on the oral irrigator 100 with the differential pressure ventilation system, and then press the gear button 61-2 once.

[0043] After selecting the appropriate fluid pressure, press the water outlet control switch 32, and the spray gun 2 will spray fluid at the selected fluid pressure to clean the oral cavity. Release the water outlet control switch 32, and the spray gun 2 will stop spraying fluid. The process is very convenient.

[0044] After use, remove the nozzle 2 from the storage handle 3, place it into the channel of the water inlet system 51, cover it with the cap 51-14, and push the control handle 3 back into the container 4 for storage.

[0045] When cleaning is required, remove the base 41, take the control handle 3 out of the container 4, and remove the water system 5 from the positioning pins 41-11 to clean each part. The cleaning process is very convenient.

[0046] The oral irrigator of the present invention includes a nozzle 1, a spray gun 2, a control handle 3, a container 4, a water system 5, and a differential pressure ventilation system 3-4. The water system 5 includes an inlet system 51 and an outlet system 52. The top of the inlet system 51 is provided with an inlet mechanism 51-1, which includes an inlet 51-11, a side wall 51-12, and an outlet 51-13. The side wall 51-12 is provided with a vent 51-12-1. The horizontal height of the upper end face L3 of the vent 51-12-1 is higher than the height of the outlet surface L1 of the outlet 51-13. A pressure difference is formed between the upper end face L3 and the outlet surface L1, allowing gas to flow from the high pressure area to the low pressure area, thus forming the differential pressure ventilation system 3-4. This ensures that gas flows during water injection, use, and pouring, and avoids the phenomenon of poor water flow during water injection, use, and pouring caused by the internal and external pressure difference of the water flosser with the differential pressure ventilation system of the present invention. Since the water inlet mechanism 51-1 is located inside the water inlet channel, the vent 51-12-1 can be designed to be large in size as needed to achieve a greater pressure difference and better ventilation effect, while not damaging the external structure. This can well maintain the integrity and sealing of the external structure of the oral irrigator with pressure difference ventilation system of the present invention, and effectively avoid possible liquid leakage. Attached Figure Description

[0047] Figure 1 This is a three-dimensional structural diagram of the oral irrigator containing a differential pressure ventilation system according to the present invention.

[0048] Figure 1-1 yes Figure 1 The main view.

[0049] Figure 1-2 yes Figure 1-1 AA sectional view.

[0050] Figure 1-3 yes Figure 1 A partial cross-sectional view.

[0051] Figure 1-4 yes Figure 1-1 The right view.

[0052] Figure 1-5 This is a diagram showing the airflow direction during water injection.

[0053] Figure 1-6 This is a diagram showing the airflow direction when water is poured.

[0054] Figure 1-7 yes Figure 1 Exploded view.

[0055] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure in the recycled state.

[0056] Figure 2-1 This is a structural diagram of a ring-shaped pressure regulating device.

[0057] Figure 3 This is a structural schematic diagram of the oral irrigator of the present invention, which has a detachable base and includes a differential pressure ventilation system.

[0058] Figure 4 yes Figure 3 A partial cross-sectional view.

[0059] Figure 4-1 yes Figure 4 Enlarged view of point B.

[0060] In the above figure:

[0061] 100 is the oral irrigator of the present invention, which includes a differential pressure ventilation system.

[0062] 1 is the nozzle, 2 is the spray gun, 3 is the control handle, 4 is the container, 5 is the water system, 6 is the water pressure regulating device, 7 is the water suction device, 8 is the power system, and 9 is the electrical system.

[0063] 304 is a telescopic mechanism, 601 is a ring-shaped water pressure regulating device, and 304-1 is a positioning mechanism.

[0064] 3-4 is a differential pressure ventilation system, and 6-1 is a staged annular water pressure regulating device.

[0065] 21 is the spray gun disassembly switch.

[0066] 31 is the housing; 32 is the water outlet control switch; 31-1 is the positioning groove; 31-2 is the connecting seat; 31-3 is the sealing ring.

[0067] 41 is the base, 42 is the side wall; 41-1 is the positioning pin, 41-2 is the locking block, 42-1 is the positioning protrusion, 42-2 is the sealing mechanism, 42-3 is the slot; 41-11 is the water channel.

[0068] 51 is the water inlet system, 52 is the water outlet system; 51-1 is the water inlet mechanism; 51-11 is the water inlet, 51-12 is the side wall, 51-13 is the water outlet, 51-14 is the cover, 52-1 is the gravity ball; 51-12-1 is the vent hole, L1 is the water outlet surface, L3 is the upper end surface of the vent hole, 51-12-2 is the shielding mechanism, and 51-12-21 is the water-blocking step.

[0069] 61 is a pressure regulating device, 62 is an indicating device, 63 is a ring-shaped water pressure display device, 61-1 is a control chip, 61-2 is a gear button, 62-1 is an indicator light, 63-1 is a ring-shaped light-transmitting window, and 63-2 is a light-shielding partition.

[0070] 71 is the electric water suction device, 71-1 is the water inlet system, 71-2 is the motor, and 71-3 is the water outlet system.

[0071] 91 is the power indicator light. Detailed Implementation

[0072] Example 1: The oral irrigator of the present invention, which includes a differential pressure ventilation system

[0073] refer to Figures 1 to 2-1 The oral irrigator with differential pressure ventilation system in this embodiment includes a nozzle 1, a spray gun 2, a control handle 3, a container 4, a water system 5, and a differential pressure ventilation system 304. The water system 5 includes an inlet system 51 and an outlet system 52.

[0074] refer to Figure 1 and Figure 1-1 The nozzle 1 is located at the front end of the spray gun 2; the control handle 3 can control the spraying of fluid in the spray gun 2.

[0075] The spray gun 2 is detachably mounted on the control handle 3. By pressing the spray gun removal switch 21, the spray gun 2 can be removed from the control handle 3.

[0076] refer to Figure 1 and Figure 2 The container 4 is movably connected to the control handle 3 via the telescopic mechanism 304. The water inlet system 51 is connected to the container 4 and injects fluid into the container 4. The fluid in the container 4 is connected to the spray gun 2 via the water outlet system 52.

[0077] The telescopic mechanism 304 includes a positioning mechanism 304-1. Typically, the positioning mechanism 304-1 is located on the upper inner side of the side wall 42, and the positioning mechanism 304-1 creates a positioning engagement between the side wall 42 and the connecting seat 31-2 of the housing 31. When the connecting seat 31-1 moves to the positioning mechanism 304-1, the positioning mechanism 304-1 locks and fixes the control handle 3, preventing the control handle 3 from moving during use.

[0078] The positioning mechanism 304-1 is an interference fit positioning mechanism, and / or a threaded positioning mechanism, and / or a convex-concave locking positioning mechanism.

[0079] refer to Figure 1-7 In this embodiment, the positioning mechanism 304-1 is a concave-convex card-fitting positioning mechanism 304-11.

[0080] The convex-concave locking positioning mechanism 304-11 consists of a positioning groove 31-1 on the outer side of the housing 31 of the control handle 3 and a positioning protrusion 42-1 on the inner side of the side wall 42 of the container 4. To ensure sealing during use, a sealing ring 31-3 is provided on the outer side of the housing 31 of the control handle 3, so that the control handle 3 and the container 4 form a sealed whole, preventing liquid leakage or dripping during use.

[0081] The applicant has only provided specific examples of the convex-concave card and positioning mechanism. In practical applications, those skilled in the art can design different positioning methods as needed. The applicant will not provide specific examples of each method, but none of them will depart from the scope of protection of this application.

[0082] In this embodiment, the top of the water inlet system 51 is provided with a water inlet mechanism 51-1, which includes an inlet 51-11, a side wall 51-12, and an outlet 51-13. The inlet 51-11 is located at the top of the water inlet mechanism 51-1 and communicates with the outside, allowing liquid to be injected into the water inlet mechanism 51-1. The outlet 51-13 is located at the bottom of the water inlet mechanism 51-1. The liquid injected through the inlet 51-11 flows into the water inlet system 51 through the outlet 51-13 and then enters the container 4. The side wall 51-12 is provided with a vent 51-12-1. The horizontal height of the upper end face L3 of the vent 51-12-1 is higher than the height of the outlet surface L1 of the outlet 51-13. A pressure difference is formed between the upper end face L3 and the outlet surface L1, constituting the pressure difference venting system 3-4.

[0083] The side wall 51-12 is provided with a shielding mechanism 51-12-2 above the vent 51-12-1. The shielding mechanism 51-12-2 can shield the vent 51-12-1 during water injection to prevent liquid from entering the vent 51-12-1, thereby better ensuring the normal operation of the differential pressure ventilation system 3-4.

[0084] refer to Figure 1-2 and Figure 1-3 In this embodiment, the shielding mechanism 51-12-2 is a water-blocking protrusion 51-12-21 integrally injection molded on the side wall 51-12. In practical applications, the shielding mechanism 51-12-2 can also be other shielding mechanisms. The applicant will not give specific examples here, but they do not depart from the protection scope of this application.

[0085] The top of the water inlet mechanism 51-1 is equipped with a cap 51-14. The cap 51-14 provides good dust protection, maintaining the cleanliness of the oral irrigator with the differential pressure ventilation system. The channel of the water inlet system 51 forms a storage cavity for the nozzle 2. During use, the cap 51-14 is opened, the nozzle 2 is removed, and connected to the control handle 3. Water is then injected into the container 4 via the water inlet mechanism 51-1. After injection, the cap 51-14 is closed, and normal oral rinsing and cleaning can be performed. After use, the nozzle 2 is removed from the storage handle 3, placed into the channel of the water inlet system 51, and the cap 51-14 is closed for storage.

[0086] The oral irrigator 100 with the differential pressure ventilation system also includes a water pressure regulating mechanism 6. The water pressure regulating mechanism 6 can adjust the fluid pressure in the spray gun 2.

[0087] In this embodiment, the water pressure regulating mechanism 6 is a ring-shaped water pressure regulating device 601, which includes a pressure regulating device 61, an indicating device 62, and a ring-shaped water pressure display device 63. The ring-shaped water pressure display device 63 can display the magnitude of the fluid pressure. The pressure regulating device 61 can adjust the pressure of the fluid ejected from the spray gun 2, while the indicating device 62 can display the fluid pressure on the ring-shaped water pressure display device 63 using lights, numerical values, or other methods. The indicating device 62 can be an indicator light, a pressure setting number, a fluid pressure value, or other similar methods. The ring-shaped water pressure display device 63 can be in various forms, such as a ring-shaped light-transmitting window, a ring-shaped light strip, or a ring-shaped digital strip, and the magnitude of the fluid pressure is intuitively displayed by the number of lit light-transmitting windows, the brightness of the ring-shaped light strip, or the numbers displayed on the ring-shaped digital strip.

[0088] Since the annular water pressure display device 63 can be configured as a hollow annular strip, and the pressure regulating device 61 can be located in the middle of the annular area formed by the annular water pressure display device 63, forming a whole, when the pressure regulating device 61 is adjusted, the annular water pressure display device 63 located around the pressure regulating device 61 can display the magnitude of the fluid pressure very intuitively, making observation very convenient.

[0089] The annular water pressure regulating device 601 can be a stepless annular water pressure regulating device or a graded annular water pressure regulating device 6-1. The stepless annular water pressure regulating device can continuously adjust the water pressure emitted by the spray gun 2, meeting all water pressure requirements. The graded annular water pressure regulating device 6-1 can adjust the water pressure in stages according to set standards, making operation simpler.

[0090] In this embodiment, the annular water pressure regulating device 601 is a graded annular water pressure regulating device 6-1.

[0091] refer to Figure 2-1 The pressure regulating device 61 includes a control chip 61-1 and a gear button 61-2. The indicating device 62 is an indicator light 62-1. The annular water pressure display device 63 includes an annular light-transmitting window 63-1 and a light-shielding partition 63-2. The gear button 61-2 is located in the middle of the annular ring formed by the annular light-transmitting window 63-1. When the gear button 61-2 is pressed, the indicator lights 62-1 light up sequentially and shine through the annular light-transmitting window 63-1 to display the fluid pressure.

[0092] The indicator lights 62-1 and the annular light-transmitting window 63-1 are set according to the number of gears corresponding to the gear buttons 61-2, and each indicator light 62-1 is set below the corresponding annular light-transmitting window 63-1 in sequence.

[0093] A separate water outlet control switch 32 is provided on the housing 31 of the control handle 3. When the water outlet control switch 32 is pressed, the spray gun 2 sprays water. When the water outlet control switch 32 is released, the spray gun 2 stops spraying water.

[0094] When in use, pressing and holding the gear button 61-2 activates the oral irrigator 100 with the differential pressure ventilation system. Pressing the gear button 61-2 once illuminates one indicator light 62-1, which shines through the corresponding annular light-transmitting window 63-1. Due to the light-shielding partition 63-2, it does not affect adjacent annular light-transmitting windows 63-1. Pressing the gear button 61-2 sequentially increases the fluid pressure, and the indicator lights 62-1 illuminate sequentially. When all indicator lights 62-1 are illuminated, pressing the gear button 61-2 again restores the fluid pressure to the set initial fluid pressure, leaving only one indicator light 62-1 still illuminated, restarting the fluid pressure adjustment cycle.

[0095] After selecting the appropriate fluid pressure, press the water outlet control switch 32, and the spray gun 2 will spray fluid at the selected fluid pressure to clean the oral cavity. Release the water outlet control switch 32, and the spray gun 2 will stop spraying fluid. The process is very convenient.

[0096] The dental irrigator 100 with an annular water pressure regulating device is turned off only when the gear button 61-2 is pressed and held again.

[0097] Since the water outlet control switch 32 and the water pressure regulating device 6 need to be turned on simultaneously for the spray gun 2 to work, accidental activation can be effectively avoided, thus better preventing accidental injury to the user, especially to the eyes and other parts of the body.

[0098] The applicant has only provided specific examples of the gear shift button, indicator light, and light-transmitting window used in conjunction with this type of annular pressure regulating device. In practical applications, those skilled in the art can also use rotary stepless speed regulating devices, touch control switches, and other combinations of light intensity, digital display, etc., to achieve the purpose of annular pressure regulation as described in this application, as needed. The applicant will not provide specific examples here, but none of them depart from the scope of protection of this application.

[0099] The pressure regulating device 61 regulates signals such as voltage, current, power, frequency, or waveform. The applicant has only listed the above signals here, but those skilled in the art can adjust other signals as needed to regulate the fluid pressure, without departing from the scope of this application.

[0100] The oral irrigator 100 with a differential pressure ventilation system includes a water suction device 7; the water suction device 7 can draw the fluid in the container 4 into the spray gun 2 through the water system 5 and then spray it out from the nozzle 1.

[0101] In this embodiment, the water suction device 7 is an electric water suction device 71; the oral irrigator 100 with a differential pressure ventilation system includes a power supply system 8 and a circuit system 9; the electric water suction device 71 includes a water inlet system 71-1, a motor 71-2, and a water outlet system 71-3; the water suction device 7 is connected to the power supply system 8 through the circuit system 9. Under the action of the power supply system 8, the motor 71-2 works, and the liquid in the container 4 is sucked into the electric water suction device 71 through the water system 5 and then sprayed out from the water outlet system 71-3. The sprayed fluid is then sprayed out from the spray gun 2 through the water system 5.

[0102] The pressure regulating device 61, the indicating device 62, and the control switch 3 are also connected together through the circuit system 9 and the power supply system 8. The circuit 9 is equipped with a power indicator light 91, which can display the power status of the power supply system 8 through color changes.

[0103] The pressure regulating device 61 can control the rotational speed of the motor 71-2. Adjusting the output signal of the pressure regulating device 61 can adjust the rotational speed of the motor 71-2, thereby adjusting the pressure of the fluid ejected from the nozzle 1.

[0104] The applicant has only listed one spray gun working method, electric water suction. In practical applications, those skilled in the art can design different spray gun working methods as needed. The applicant will not give examples of them all, but none of them will depart from the protection scope of this application.

[0105] refer to Figure 1 The water outlet system 52 is equipped with a gravity ball 52-1 at its end. A filter screen can be installed inside the gravity ball 52-1 to filter the fluid, making the process more hygienic.

[0106] In use, the control handle 3 is pulled out of the container 4, the cover 51-14 is opened, the nozzle 2 is taken out and connected to the control handle 3, and water is injected into the container 4 through the water inlet mechanism 51-1. At this time, since the upper end surface L3 is higher than the water outlet surface L1, the air in the water flosser 100 with the differential pressure ventilation system can be discharged from the vent 51-12-1 (see reference). Figure 1-5 This prevents excessive compressed air pressure from hindering the smooth injection of liquid into the container 4, ensuring a successful water injection process. After water injection, cover the container with the cap 51-14, press and hold the gear button 61-2 to activate the water flosser 100 with the differential pressure ventilation system, and then press the gear button 61-2 once.

[0107] After selecting the appropriate fluid pressure, press the water outlet control switch 32, and the spray gun 2 will spray fluid at the selected fluid pressure to clean the oral cavity. Release the water outlet control switch 32, and the spray gun 2 will stop spraying fluid. The process is very convenient.

[0108] After use, if it is necessary to quickly pour out the remaining liquid in the container 4, the upper end face L3 is lower than the outlet surface L1. Under the action of pressure difference, external air can continuously enter the water irrigator 100 with the pressure difference ventilation system, ensuring the balance of internal and external pressure, so that the liquid in the container 4 can be smoothly discharged. (Refer to...) Figure 1-6 .

[0109] After pouring out the remaining liquid, remove the nozzle 2 from the storage handle 3 and place it into the channel of the water inlet system 51. Cover it with the cap 51-14 and push the control handle 3 back into the container 4 to store it.

[0110] In this embodiment, since the upper end face L3 of the vent 51-12-1 is higher than the water outlet face L1 of the outlet 51-13, a pressure difference is formed between the upper end face L3 and the water outlet face L1. This allows gas to flow from the high-pressure area to the low-pressure area, forming the differential pressure ventilation system 3-4. This ensures gas flow during water injection, use, and emptying, preventing water flow obstruction during these processes due to the internal and external pressure difference in the water flosser with the differential pressure ventilation system of this invention. Furthermore, since the water inlet mechanism 51-1 is located inside the water inlet channel, the vent 51-12-1 can be designed to a larger size as needed to achieve a greater pressure difference and better ventilation effect without damaging the external structure. This effectively maintains the integrity and sealing of the external structure of the water flosser with the differential pressure ventilation system of this invention, preventing potential liquid leakage.

[0111] Example 2: The oral irrigator of the present invention with a differential pressure ventilation system, which is fully detachable.

[0112] refer to Figures 3 to 4-1 The difference between this embodiment and embodiment 1 is that in this embodiment, each part of the oral irrigator with differential pressure ventilation system can be disassembled and cleaned separately.

[0113] The spray gun 2 is detachably mounted on the control handle 3. By pressing the spray gun removal switch 21, the spray gun 2 can be removed from the control handle 3.

[0114] refer to Figure 4 and Figure 4-1 In this embodiment, the container 4 includes a base 41 and a side wall 42. The base 41 is detachably mounted on the bottom of the side wall 42 via a snap-fit ​​connection. The base 41 has a locking block 41-2, and the inner bottom of the side wall 42 has a locking groove 42-3. The locking block 41-2 is embedded in the locking groove 42-3 to form a snap-fit ​​connection. The base 41 and the side wall 42 are sealed together by a sealing mechanism 42-2. When the base 41 is removed from the side wall 42, the control handle 3 can be removed through the cavity channel in the side wall 42, thus separating the control handle 3 from the container 4.

[0115] refer to Figure 3 The base 41 is provided with a positioning pin 41-1, and one end of the water outlet system 52 is detachably installed and fixed on the positioning pin 41-1.

[0116] The positioning pin 41-1 is provided with a water passage 41-11. When the water outlet system 52 is installed on the positioning pin 41-1, the fluid in the container 4 can enter the water outlet system 52 through the water passage 41-11. The detachable installation method allows the water outlet system 52 to be detached from the positioning pin 41-11 after the base 41 and the side wall 42 are separated, thereby enabling the water outlet system 52 to be cleaned.

[0117] The oral irrigator with differential pressure ventilation system in this embodiment is designed with detachable installation of the spray gun 2, the base 41, and the water system 5. In actual use, when cleaning is required, the spray gun 2, the control handle 3, the container 4, and the water system 5 can all be disassembled for cleaning, achieving full machine washing. This effectively solves the problem of inconvenient disassembly and difficult cleaning of existing retractable oral irrigator products.

[0118] It should be noted that the structures disclosed and described herein can be replaced by other structures with the same effect, and the embodiments described herein are not the only structures for implementing the present invention. Although preferred embodiments of the present invention have been described and illustrated herein, those skilled in the art will understand that these embodiments are merely illustrative, and those skilled in the art can make numerous variations, modifications, and substitutions without departing from the present invention. Therefore, the scope of protection of the present invention should be defined in accordance with the spirit and scope of the appended claims.

Claims

1. An oral irrigator comprising a pressure differential ventilation system, characterized in that: The oral irrigator (100) with the pressure difference ventilation system comprises a nozzle (1), a spray gun (2), a control handle (3), a container (4), a waterway system (5) and a pressure difference ventilation system (3-4); A. The nozzle (1) is arranged at the front end of the spray gun (2); the control handle (3) can control the ejection of fluid in the spray gun (2); B. The container (4) comprises a base (41) and a side wall (42), the container (4) is movably or detachably connected to the control handle (3); the waterway system (5) comprises a water inlet system (51) and a water outlet system (52); the fluid in the container (4) is connected to the spray gun (2) through the waterway system (5); C. The top of the water inlet system (51) is provided with a water inlet mechanism (51-1), the water inlet mechanism (51-1) comprises a water inlet (51-11), a side wall (51-12) and a water outlet (51-13); the water inlet (51-11) is arranged at the top of the water inlet mechanism (51-1) and communicates with the outside, so that liquid can be injected into the water inlet mechanism (51-1); the water outlet (51-13) is arranged at the bottom of the water inlet mechanism (51-1), the liquid injected through the water inlet (51-11) flows into the water inlet system (51) through the water outlet (51-13) and then enters the container (4); the side wall (51-12) is provided with a ventilation hole (51-12-1), the horizontal height of the upper end surface (L3) of the ventilation hole (51-12-1) is higher than the height of the water outlet surface (L1) of the water outlet (51-13), a pressure difference is formed between the upper end surface (L3) and the water outlet surface (L1), and the pressure difference ventilation system (3-4) is formed; when liquid is injected into the container (4), the ventilation hole (51-12-1) is higher than the water outlet (51-13), the air in the oral irrigator (100) with the pressure difference ventilation system can be discharged from the ventilation hole (51-12-1), and the smooth injection of liquid is ensured; when flushing is performed, the liquid in the container (4) is connected to the spray gun (2) through the water outlet system (52), and the oral cavity is flushed through the nozzle (1); when the liquid in the container (4) is discharged, the ventilation hole (51-12-1) is lower than the water outlet (51-13), external air enters the oral irrigator (100) with the pressure difference ventilation system through the ventilation hole (51-12-1), and the liquid in the container (4) is smoothly discharged under the action of air pressure.

2. The oral irrigator with a pressure differential ventilation system according to claim 1, characterized in that: The side wall (51-12) is provided with a shielding mechanism (51-12-2) at the upper part of the ventilation hole (51-12-1).

3. The oral irrigator with a pressure differential ventilation system according to claim 2, characterized in that: The shielding mechanism (51-12-2) is a water blocking convex step (51-12-21).

4. The oral irrigator with a pressure differential ventilation system according to claim 3, characterized in that: The top of the water inlet mechanism (51-1) is provided with a cover (51-14).

5. The waterpik with a pressure differential ventilation system of claim 1, wherein: The base (41) is detachably mounted at the bottom of the side wall (42).

6. The waterpik with a pressure differential ventilation system according to claim 5, characterized in that: The base (41) is provided with a positioning pin (41-1), and the water outlet system (52) is detachably fixed on the positioning pin (41-1).

7. The waterpik with a pressure differential ventilation system of claim 1, wherein: The oral irrigator (100) with the differential pressure ventilation system further comprises a telescopic mechanism (304), and the container (4) is movably connected to the control handle (3) through the telescopic mechanism (304).

8. The oral irrigator with a pressure differential ventilation system according to claim 7, characterized in that: The telescopic mechanism (304) comprises a positioning mechanism (304-1).

9. The oral irrigator of claim 8, wherein: The positioning mechanism (304-1) is an interference fit positioning mechanism, a threaded positioning mechanism, and / or a concave-convex clamping positioning mechanism.

10. The oral irrigator of claim 9, wherein: The positioning mechanism (304-1) is a concave-convex clamping positioning mechanism (304-11).

11. The oral irrigator with a pressure differential ventilation system according to claim 10, characterized in that: The concave-convex clamping positioning mechanism (304-11) is composed of a positioning groove (31-1) arranged on the outer side of the shell (31) of the control handle (3) and a positioning convex step (42-1) arranged on the inner side of the side wall (42) of the container (4).

12. The waterpik with a pressure differential ventilation system of claim 1, wherein: The oral irrigator (100) with the differential pressure ventilation system further comprises a water pressure adjusting mechanism (6).

13. The oral irrigator of claim 12, wherein: The water pressure adjusting mechanism (6) is a ring-shaped water pressure adjusting device (601), which comprises a pressure adjusting device (61), an indicating device (62), and a ring-shaped water pressure display device (63); and the ring-shaped water pressure display device (63) can display the size of the fluid pressure.

14. The oral irrigator of claim 13, wherein: The ring-shaped water pressure adjusting device (601) is a stepless ring-shaped water pressure adjusting device or a stepped ring-shaped water pressure adjusting device (6-1).

15. The oral irrigator of claim 13, wherein: The pressure adjusting device (61) comprises a control chip (61-1) and a gear button (61-2), the indicating device (62) is an indicating lamp (62-1), and the ring-shaped water pressure display device (63) comprises a ring-shaped light-transmitting window (63-1) and a light-shielding partition (63-2); the gear button (61-2) is arranged at the middle part of the ring-shaped circle formed by the ring-shaped light-transmitting window (63-1); and when the gear button (61-2) is pressed, the indicating lamp (62-1) is sequentially lighted and sequentially transmitted through the ring-shaped light-transmitting window (63-1) to display the size of the fluid pressure.

16. The oral irrigator of claim 13, wherein: The signal adjusted by the pressure adjusting device (61) is voltage, current, power, frequency, or waveform.

17. The waterpik with a pressure differential ventilation system of claim 1, wherein: The oral irrigator (100) with the differential pressure ventilation system comprises a water suction device (7); and the water suction device (7) can suck the fluid in the container (4) into the water gun (2) through the water channel system (5) and then spray the fluid from the spray head (1).

18. The oral irrigator of claim 17, wherein: The water suction device (7) is an electric water suction device (71); the oral irrigator (100) with the differential pressure aeration system contains a power supply system (8) and a circuit system (9); the electric water suction device (71) contains a water inlet path system (71-1), a motor (71-2) and a water outlet path system (71-3); the water suction device (7) is connected through the circuit system (9) and the power supply system (8), under the action of the power supply system (8), the motor (71-2) works, the liquid in the container (4) is sucked into the electric water suction device (71) through the water path system (5) and sprayed from the water outlet path system (71-3), the sprayed fluid is sprayed from the spray gun (2) through the water path system (5).

19. The waterpik with a pressure differential ventilation system of claim 18, wherein: The pressure regulating device (61) can control the rotating speed of the motor (71-2), the output signal of the pressure regulating device (61) can adjust the rotating speed of the motor (71-2), and the pressure of the fluid sprayed from the spray head (1) is adjusted.

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