CN111214305A

CN111214305A - Spray type tooth-rinsing device

Info

Publication number: CN111214305A
Application number: CN202010148384.7A
Authority: CN
Inventors: 赵喜芳
Original assignee: Shenzhen Yudian Technology Co Ltd
Current assignee: Shenzhen Yudian Technology Co Ltd
Priority date: 2020-03-05
Filing date: 2020-03-05
Publication date: 2020-06-02

Abstract

The invention relates to a spray type tooth flushing device which comprises a machine body, wherein a water tank and a working box are respectively arranged in the machine body, and the working box is divided into a mixing area, a hydraulic area and an air pressure area through a partition plate; the water tank is provided with a water inlet, an introducing port and a water outlet; the top wall of the mixing area is communicated with the nozzle assembly; the hydraulic pressure area is internally provided with a hydraulic leather cup and a hydraulic rod, the pneumatic area is internally provided with a pneumatic leather cup and a pneumatic rod, and the hydraulic rod and the pneumatic rod are in transmission connection with a driving mechanism so as to suck or lead out liquid and gas under the driving of the driving mechanism, and the liquid and the gas are converged in the mixing area and are led out from the nozzle assembly in a spray form. From this, can clean gingival sulcus and slit through the high pressure spray that produces, reduce the residue of hydrops in the oral cavity, and because the water consumption is less, can greatly reduce the volume of water tank to convenient to user carries.

Description

Spray type tooth-rinsing device

Technical Field

The invention relates to the technical field of tooth and oral care, in particular to a spray type tooth flushing device.

Background

The gingival sulcus, which is the most important interface to the root of the tooth, is the sulcus that surrounds the tooth but does not adhere to the tooth, which is about 2 mm deep at the interface between the tooth and the gum. However, the teeth and gum are easily affected by the uneven areas which are easy to store dirt and gum. The gingival sulcus and crevices are the two least easily cleaned areas and studies have indicated that "as many as 40% of the tooth surface cannot be cleaned with a toothbrush". Although the dental floss (or toothpick) can remove food residues on the surface of teeth, microscopically, the uneven surface of teeth can still be cleaned, so that the health of gums or teeth has a great hidden trouble.

At present, the tooth flusher on the market mainly sprays water flow in a proper pulse form to clean gingival sulcus and slits, but in this way, a large amount of effusion is generated in the oral cavity, so that the water flow continuously overflows from the mouth in the tooth flushing process, mirrors and clothes are easily polluted, and the appearance is quite unsightly. Moreover, the water consumption of the tooth flushing device is large, and a water tank with larger capacity needs to be arranged. Therefore, the tooth flushing device occupies a large space and is inconvenient to carry on business trips and travels.

Aiming at the problems of large water consumption and inconvenient carrying of the tooth flushing device in the prior art, a more reasonable technical scheme is required to be provided so as to solve the technical problems existing at present.

Disclosure of Invention

The invention aims to provide a spray type tooth flushing device, which solves the problems of high water consumption and inconvenience in carrying of a water spray type tooth flushing device in the prior art.

In order to achieve the aim, the invention provides a spray type tooth flushing device which comprises a machine body and a spray nozzle assembly, wherein the machine body is provided with a spray nozzle assembly; the working box is arranged in the machine body and is divided into a mixing area, a hydraulic area and an air pressure area by a partition plate, the hydraulic area and the air pressure area are arranged in parallel and are both positioned below the mixing area, the working box is also provided with an air inlet enabling the outside to be communicated with the air pressure area and an air outlet enabling the air pressure area to be communicated with the mixing area, and the top wall of the mixing area is communicated with the nozzle assembly; the water tank and the working tank are arranged in the machine body side by side, and the water tank is provided with a water inlet, an introducing port communicated with the hydraulic area and a water outlet used for enabling the hydraulic area to be communicated with the mixing area; the hydraulic pressure area is internally provided with a hydraulic leather cup matched with the cross section of the hydraulic pressure area and a hydraulic rod connected with the hydraulic leather cup, the pneumatic pressure area is internally provided with a pneumatic leather cup matched with the cross section of the hydraulic pressure area and a pneumatic rod connected with the pneumatic leather cup, and the hydraulic rod and the pneumatic rod are both in transmission connection with a driving mechanism so as to suck or lead out liquid and gas under the driving of the driving mechanism, enable the liquid and the gas to be converged in the mixing area and be led out from the nozzle assembly in a spray mode.

Optionally, the ratio of the cross-sectional area of the hydraulic zone to the cross-sectional area of the pneumatic zone is 1: 15 to 20.

Optionally, the hydraulic rod and the pneumatic rod are both connected with the driving mechanism through a support; the periphery cover of support is equipped with the spring, spring one end butt in the atmospheric pressure pole, other end butt is in the setting the mounting bracket of work box below, actuating mechanism sets up on the mounting bracket.

Optionally, the driving mechanism comprises a motor and a gear assembly in transmission connection with the motor, and a screw in meshing transmission with the gear assembly is arranged at the lower end of the support.

Optionally, the nozzle assembly comprises a spray head communicated with the working box and a fixing piece for mounting the spray head, and the fixing piece is detachably connected with the machine body and is arranged above the water tank and the working box; the fixing piece is provided with a water tank cover capable of covering or opening the introducing port.

Optionally, the opening of the water inlet is larger in size than the spray head so that the spray head can be placed in the water tank.

Optionally, a sealing gasket is arranged between the fixing piece and the working box, and the spray head is detachably arranged on the sealing gasket.

Optionally, the end of the spray head is provided with a plurality of grooves, and the grooves are uniformly spaced around the axial direction of the spray head.

Optionally, a water inlet check valve for limiting the flow direction of liquid is arranged on the introducing port, an air inlet check valve for limiting the flow direction of gas is arranged on the air inlet, and a separation check valve for conducting fluid in a one-way manner is arranged on the top wall of the mixing region and at the connection position with the nozzle assembly.

Optionally, a battery and a limiting frame for mounting the battery are arranged below the working box, the limiting frame is arranged between the driving mechanism and the battery, and the battery is detachably connected with the limiting frame.

Through the technical scheme, the hydraulic leather cup can be matched with the hydraulic area, and the hydraulic rod can enable the hydraulic area to generate pressure difference under the driving of the driving mechanism, so that the pressure for sucking liquid and the pressure for pushing out the liquid are formed; the air pressure packing cup can be matched with the air pressure area, and the air pressure rod can enable the air pressure area to generate pressure difference under the driving of the driving mechanism, so that the pressure of sucked air and the pressure of pushed liquid are formed. Under the condition, the driving mechanism pulls the hydraulic rod and the air pressure rod, so that liquid and gas can be respectively sucked into the hydraulic area and the air pressure area, the pushing pressure is generated under the pushing of the driving mechanism, the liquid and the gas are pushed into the mixing area, high pressure can be generated along with the continuous pushing of the driving mechanism, and then the gas-liquid mixture is extruded out through the nozzle assembly to generate high-pressure spraying.

Clean gingival sulcus and slit through this high pressure spraying, can reduce the residue of hydrops in the oral cavity, avoid appearing constantly overflowing the inelegant condition of hydrops from the mouth, simultaneously, also be of value to improving comfort and the sense of safety of user in the use. In addition, the oral cavity is cleaned in a high-pressure spraying mode, a certain lubricating effect can be generated on the gingival crevice or the gingival sulcus, so that food residues can be favorably and smoothly flushed out, the effect of thoroughly cleaning the gingival sulcus and the gingival crevice is realized, the dental hygiene is effectively ensured, and the oral halitosis is eliminated. In addition, the high-pressure spray can massage the gums, so that the blood circulation of the gums is promoted, and the disease resistance of local tissues is increased. This tooth ware is washed to atomizing in the course of the work, the liquid volume of consumption is few, can greatly reduce the volume of water tank, benefits in optimizing the structure that the tooth ware was washed to the atomizing, alleviates the atomizing and washes weight and volume of tooth ware body to convenient to use person carries, is particularly useful for business trip or travel.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a perspective view of a spray-on dental irrigator provided by the present invention in one embodiment;

FIG. 2 is a front view of a spray water toothpick in one embodiment provided by the present invention;

FIG. 3 is a top view of a spray-on dental irrigator provided by the present invention in one embodiment;

FIG. 4 is a side view of a spray-on dental irrigator provided by the present invention in one embodiment;

FIG. 5 is a cross-sectional view of a spray-on dental irrigator provided by the present invention in one embodiment;

FIG. 6 is a perspective view of the spray water toothpick provided in accordance with the present invention in an embodiment with the body removed to reveal internal construction;

FIG. 7 is an enlarged schematic view of portion A of FIG. 6;

fig. 8 is an exploded view of the spray die provided by the present invention in an embodiment wherein the body is not shown.

Description of the reference numerals

1-body, 2-water tank, 21-water inlet, 22-leading-in port, 3-working tank, 31-air inlet, 4-nozzle assembly, 41-spray head, 401-groove, 42-fixing piece, 43-water tank cover, 44-sealing pad, 45-ventilation port, 5-driving mechanism, 51-motor, 52-first straight gear, 53-crown gear, 54-second straight gear, 61-hydraulic leather cup, 62-hydraulic rod, 63-pneumatic leather cup, 64-pneumatic rod, 71-support, 72-spring, 73-screw rod, 81-mounting rack, 82-battery, 83-limiting rack, 91-water inlet one-way valve and 92-separation one-way valve.

Detailed Description

The invention is further described with reference to the following figures and specific embodiments. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Specific structural and functional details disclosed herein are merely illustrative of example embodiments of the invention. This invention may, however, be embodied in many alternate forms and should not be construed as limited to the embodiments set forth herein.

It should be understood that the terms first, second, etc. are used merely for distinguishing between descriptions and are not intended to indicate or imply relative importance. Although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of example embodiments of the present invention.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, B exists alone, and A and B exist at the same time.

It is to be understood that in the description of the present invention, the terms "upper", "vertical", "inside", "outside", and the like, refer to an orientation or positional relationship that is conventionally used for placing the product of the present invention, or that is conventionally understood by those skilled in the art, and are used merely for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, and/or groups thereof.

In the following description, specific details are provided to facilitate a thorough understanding of example embodiments. However, it will be understood by those of ordinary skill in the art that the example embodiments may be practiced without these specific details.

According to an embodiment of the present invention, there is provided a spray type tooth irrigator which can wash out food remnants adhered to gingival sulcus and interdental spaces, thereby improving the hygienic environment of the oral cavity. Fig. 1 to 8 show one specific embodiment thereof.

As shown in fig. 1 to 8, the spray type tooth flushing device comprises a machine body 1, wherein a water tank 2 and a working tank 3 are respectively arranged in the machine body 1, the working tank 3 is divided into a mixing area, a hydraulic area and an air pressure area by a partition plate, the hydraulic area and the air pressure area are arranged in parallel and are both positioned below the mixing area, so that liquid and gas can be converged in the mixing area; the water tank 2 is provided with a water inlet 21, an inlet 22 communicated with the hydraulic area, and a water outlet for communicating the hydraulic area with the mixing area.

The working box 3 is provided with an air inlet 31 for communicating the outside with the air pressure zone and an air outlet for communicating the air pressure zone with the mixing zone, the top wall of which communicates with the nozzle assembly 4.

The hydraulic pressure area is provided with a hydraulic leather cup 61 with a matched cross section and a hydraulic rod 62 connected with the hydraulic leather cup 61, the pneumatic area is provided with a pneumatic leather cup 63 with a matched cross section and a pneumatic rod 64 connected with the pneumatic leather cup 63, and the hydraulic rod 62 and the pneumatic rod 64 are in transmission connection with the driving mechanism 5 so as to suck or lead out liquid and gas under the driving of the driving mechanism 5, enable the liquid and the gas to be combined in the mixing area and lead out from the nozzle assembly 4 in a spraying mode. In the present disclosure, both the hydraulic cup 61 and the pneumatic cup 63 are made of food grade silica gel material.

Through the technical scheme, the hydraulic leather cup 61 can be matched with the hydraulic area, and the hydraulic rod 62 can enable the hydraulic area to generate pressure difference under the driving of the driving mechanism 5, so that the pressure of sucked liquid and the pressure of pushed liquid are formed; the air pressure cup 63 can be matched with the air pressure area, and the air pressure rod 64 can enable the air pressure area to generate pressure difference under the driving of the driving mechanism 5, so that the pressure of sucked air and the pressure of pushed liquid are formed. In this case, the driving mechanism 5 pulls the hydraulic rod 62 and the pneumatic rod 64, so that the liquid and the gas can be respectively sucked into the hydraulic area and the pneumatic area, and the pushing-out pressure is generated under the pushing of the driving mechanism 5, so that the liquid and the gas can be pushed into the mixing area, and high pressure can be generated along with the continuous pushing of the driving mechanism 5, and then the gas-liquid mixture is extruded out through the nozzle assembly 4, so that high-pressure spray is generated. Because the volumes of the mixing area, the hydraulic area and the air pressure area are fixed and the pressures (including suction and pushing force) generated by the hydraulic leather cup 61 and the air pressure leather cup 63 are fixed, the gas and the liquid can be mixed in a fixed proportion, and the smoothness of the spraying pressure is ensured.

Clean gingival sulcus and slit through this high pressure spraying, can reduce the residue of hydrops in the oral cavity, avoid appearing constantly overflowing the inelegant condition of hydrops from the mouth, simultaneously, also be of value to improving comfort and the sense of safety of user in the use. In addition, the oral cavity is cleaned in a high-pressure spraying mode, a certain lubricating effect can be generated on the gingival crevice or the gingival sulcus, so that food residues can be favorably and smoothly flushed out, the effect of thoroughly cleaning the gingival sulcus and the gingival crevice is realized, the dental hygiene is effectively ensured, and the oral halitosis is eliminated. In addition, the high-pressure spray can massage the gums, so that the blood circulation of the gums is promoted, and the disease resistance of local tissues is increased. This tooth ware is washed to atomizing in the course of the work, the liquid volume of consumption is few, can greatly reduce the volume of water tank 2, benefits in optimizing the structure that the tooth ware was washed to the atomizing, alleviates the atomizing and washes weight and volume of tooth ware body to convenient to use person carries, is particularly useful for business trip or travel.

It should be noted that the liquid herein mainly refers to water. During the use, the user can also add a certain amount of breath freshener or other medicament for treating oral diseases to the water tank 2 according to his or her needs, which depends on the actual application environment, and the invention will not be described herein.

In the particular embodiments provided by the present invention, the hydraulic and pneumatic zones may be divided in any suitable manner.

In one embodiment, the ratio of the cross-sectional area of the hydraulic zone to the cross-sectional area of the pneumatic zone is 1: 15 to 20. Thus, the water consumption can be reduced while ensuring the cleaning effect. For example, in the case that the hydraulic rod 62 and the pneumatic rod 64 move by the same stroke, the pneumatic area can suck about 3ml of gas, and the hydraulic area can suck about 0.2ml of liquid, so that the guided spray can effectively clean teeth and comfortably massage gums, and in this case, the water tank 2 has a capacity of only 10ml to 14ml, and can continuously spray for more than 50 to 70 times, thereby greatly reducing the volume and weight of the spray type tooth flusher, and facilitating carrying during business trips or traveling. Of course, the ratio of the cross-sectional area of the hydraulic area to the area of the pneumatic area can also be any suitable ratio of 1/10, 1/16, 1/20, etc., and those skilled in the art can flexibly set the ratio according to actual requirements without departing from the concept of the present invention, and the present invention is not described herein again.

In the present invention, referring to fig. 5 and 8, the piston rods of the air pump and the water pump are respectively connected with the support 71, and the support 71 is in transmission connection with the driving mechanism 5. So, can make the piston rod synchronous motion of air pump and water pump to make gas and liquid can mix with fixed proportion, be of value to the stationarity of guaranteeing spray pressure, thereby guarantee the clean effect of atomizing tooth ware of washing.

In one embodiment, referring to fig. 5, hydraulic rod 62 and pneumatic rod 64 are connected to drive mechanism 5 by a support 71; the outer periphery of the support 71 is fitted with a spring 72, one end of the spring 72 abuts against the air pressure rod 64, the other end abuts against a mounting bracket 81 provided below the work box 3, and the drive mechanism 5 is provided on the mounting bracket 81. Therefore, the gas and liquid guiding device is beneficial to reducing rigid impact, and is beneficial to leading out gas and liquid quickly and effectively under the elastic action of the spring 72, and the using effect is ensured.

In the embodiments provided herein, the drive mechanism 5 may be configured in any suitable configuration.

In a specific embodiment, the driving mechanism 5 may include a motor 51 and a gear assembly drivingly connected to the motor 51, and the lower end of the support 71 is provided with a screw 73 drivingly engaged with the gear assembly. In this way, the rotary motion generated by the motor 51 can be converted into a linear motion of the support 71. The moving speed of the support 71 can be controlled by the rotation speed of the motor 51, and the support 71 can be moved up and down by the normal rotation and reverse rotation of the motor 51.

Alternatively, a reduction gear assembly is selected, which increases the torque and reduces the range of movement of the support 71, thereby contributing to the stability of the spray pressure. Referring to fig. 5 and 8, in this embodiment, the gear assembly includes a first spur gear 52 connected to an output shaft of the motor 51, a crown gear 53 engaged with the first spur gear 52, and a second spur gear 54 engaged with the crown gear 53, and the screw 73 can be engaged with a pinion of the second spur gear 54. Therefore, the output direction of the power can be changed, the torque is increased, the rotating speed is reduced, and the support 71 is driven to move up and down.

The parameters for each gear can be freely chosen by the person skilled in the art according to the actual requirements. Of course, the gear assembly may be configured in any other suitable manner, as the present invention is not limited in this respect. Further, a working magnet and a hall device may be further provided on the second spur gear 54 to be able to be powered off when the second spur gear 54 rotates for a certain time, thereby generating pulses of a fixed frequency to output a high pressure spray at a specific frequency. Since the operating principle of the hall device is common knowledge in the art, it is not described herein.

In embodiments of the present invention, the nozzle assembly 4 may be constructed in any suitable configuration.

Referring to fig. 8, the nozzle assembly 4 may include a spray head 41 communicating with the operating box 3 and a fixing member 42 for mounting the spray head 41, the fixing member 42 being detachably connected to the body 1 and disposed above the water tank 2 and the operating box 3, so that the position of the spray head 41 with respect to the mixing area is secured, which is beneficial for smoothly guiding the spray. At the same time, it is also beneficial to perform maintenance and replacement of the spray head 41. In addition, the protective effect can be achieved. For example, after the sprayer 41 is detached from the positioning part when being carried outside, the occupied space can be reduced, and the sprayer 41 can be prevented from colliding or being extruded. Wherein, the fixing member 42 may further be provided with a water tank cover 43 capable of covering or uncovering the introducing port 22, thereby protecting the water tank 2. In addition, the fixing member 42 may further have air holes corresponding to the positions of the air inlets 31 so as to facilitate the introduction of air into the air pressure region.

In a specific embodiment of the present invention, the opening size of the water inlet 21 is larger than the size of the nozzle 41, so that the nozzle 41 can be placed in the water tank 2, thereby realizing management of the nozzle 41 through the structure of the tooth flushing device itself, not only reducing the occupied space of the nozzle 41, but also facilitating carrying by a user; can also prevent loss and is beneficial to storage.

In order to prevent the fluid from overflowing, a packing 44 is provided between the fixing member 42 and the operating box 3, and the spray head 41 is detachably provided on the packing 44. Thus, the sealing effect between the head 41 and the work tank 3 can be improved, the fluid is prevented from overflowing, and the use effect is ensured.

In one embodiment, referring to FIG. 7, the end of the showerhead 41 may be provided with a plurality of grooves 401, the grooves 401 being evenly spaced about the axial direction of the showerhead 41. Thus, the spray can overflow through the grooves 401, thereby cleaning various teeth crevice holes and convex-concave surfaces, and improving the cleaning surface and the cleaning effect.

In the present invention, as shown in fig. 8, the inlet 22 is provided with a water inlet check valve 91 for limiting the flow direction of the liquid, so that the liquid will not flow back into the water tank 2 due to squeezing after being sucked, thereby preventing the water in the water tank 2 from being polluted, and ensuring the hydraulic pressure in the hydraulic area, which is beneficial to leading out the liquid smoothly. The gas inlet 31 is provided with a gas inlet check valve for limiting the gas flow direction, so that the gas can be prevented from overflowing out of the gas pressure area, and the stable gas pressure is formed. A separate one-way valve 92 for one-way communication of fluid is provided in the top wall of the mixing zone and in connection with the nozzle assembly 4. Therefore, the gas-liquid mixture can be smoothly guided out, and the mixture is prevented from flowing back to the mixing area to cause pollution.

In order to improve the application range of the spray type tooth flushing device, a battery 82 and a limiting frame 83 for installing the battery 82 are arranged below the working box 3, the limiting frame 83 is arranged between the driving mechanism 5 and the battery 82, and the battery 82 is detachably connected with the limiting frame 83. Thus, the battery 82 can supply power to the drive mechanism 5, and thus, even when power cannot be supplied outdoors or the like, a certain duration can be maintained. In addition, a TYPE-C charging port is arranged below the machine body 1, so that the battery 82 can be charged by a mobile power supply (such as a charger), and the application range is widened.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims

1. A spray-on dental irrigator, comprising:

the nozzle assembly comprises a machine body (1), wherein a nozzle assembly (4) is arranged on the machine body (1);

the working box is arranged in the machine body (1) and is divided into a mixing area, a hydraulic area and an air pressure area by a partition plate, and the hydraulic area and the air pressure area are arranged in parallel and are both positioned below the mixing area; the working box (3) is also provided with an air inlet (31) which leads the outside to be communicated with the air pressure area and an air outlet which leads the air pressure area to be communicated with the mixing area, and the top wall of the mixing area is communicated with the nozzle component (4); and

the water tank and the working tank are arranged in the machine body (1) side by side, and a water inlet (21), an introducing port (22) communicated with the hydraulic area and a water outlet used for enabling the hydraulic area to be communicated with the mixing area are formed in the water tank (2);

the hydraulic pressure area is internally provided with a hydraulic leather cup (61) with a matched cross section and a hydraulic rod (62) connected with the hydraulic leather cup (61), the pneumatic area is internally provided with a pneumatic leather cup (63) with a matched cross section and a pneumatic rod (64) connected with the pneumatic leather cup (63), and the hydraulic rod (62) and the pneumatic rod (64) are both in transmission connection with a driving mechanism (5) so as to suck or lead out liquid and gas under the driving of the driving mechanism (5), and the liquid and the gas can be converged in the mixing area and can be led out from the nozzle assembly (4) in a spraying mode.

2. The spray dental irrigator of claim 1 wherein the ratio of the cross-sectional area of the hydraulic zone to the cross-sectional area of the pneumatic zone is 1: 15 to 20.

3. The spray dental applicator according to claim 1, wherein the hydraulic rod (62) and the pneumatic rod (64) are each connected to the drive mechanism (5) by a support (71); the periphery cover of support (71) is equipped with spring (72), spring (72) one end butt in atmospheric pressure pole (64), other end butt in setting up mounting bracket (81) of work box (3) below, actuating mechanism (5) set up on mounting bracket (81).

4. The spray dental applicator according to claim 3, wherein the drive mechanism (5) comprises a motor (51) and a gear assembly in driving connection with the motor (51), and the lower end of the support (71) is provided with a screw (73) in meshing transmission with the gear assembly.

5. The spray dental applicator according to claim 1, wherein the nozzle assembly (4) comprises a spray head (41) communicating with the working chamber (3) and a fixing member (42) for mounting the spray head (41), the fixing member (42) being detachably connected to the body (1) and disposed above the water tank (2) and the working chamber (3); the fixing piece (42) is provided with a water tank cover (43) capable of covering or opening the introducing port (22).

6. The spray dental applicator of claim 5, wherein the opening of the water inlet (21) is larger in size than the spray head (41) to enable the spray head (41) to be placed in the water tank (2).

7. The spray dental applicator according to claim 5, wherein a seal (44) is provided between the fixing member (42) and the working chamber (3), and the spray head (41) is detachably provided on the seal (44).

8. The spray dental applicator of claim 5, wherein the end of the spray head (41) is provided with a plurality of recesses (401), the recesses (401) being evenly spaced about the axial direction of the spray head (41).

9. The spray type tooth flusher according to claim 1, wherein a water inlet check valve (91) for limiting the flow direction of liquid is arranged on the introducing port (22), a gas inlet check valve for limiting the flow direction of gas is arranged on the gas inlet (31), and a separation check valve (92) for conducting fluid in a single direction is arranged on the top wall of the mixing zone and connected with the nozzle assembly (4).

10. The spray type tooth flushing device according to claim 1, wherein a battery (82) and a limiting frame (83) for mounting the battery (82) are arranged below the working box (3), the limiting frame (83) is arranged between the driving mechanism (5) and the battery (82), and the battery (82) is detachably connected with the limiting frame (83).