Inhalation and injection structure of oral cavity washer

Abstract

To provide an oral cavity washer capable of maintaining the cleanliness of an oral cavity regardless of teeth alignment.SOLUTION: According to an embodiment of the present invention, an oral cavity washer includes a mouthpiece for injecting washing water 51 into an oral cavity, a core suction part 150 for inhaling polluted water 53 that has the washing water and saliva mixed therein from the inside of the oral cavity, an inflow passage 101 through which the washing water flows, a discharge flow passage 107 through which the polluted water flows, and a handle in which a space in which the washing water flows in at least either one direction of an upper side or a lower side of the discharge flow passage is formed and a diffusion flow passage 103 for supplying the washing water to the mouthpiece is formed.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a suction and spray structure of an oral irrigator, and more particularly to a suction and spray structure of an oral irrigator that sprays cleaning water into the oral cavity and sucks in and expels contaminated water from the oral cavity. [Background technology]

[0002] Figure 1 shows numbers used to classify teeth according to their location, and Figure 2 shows the names of different tooth parts.

[0003] Referring to Figures 1 and 2, humans normally have 26 to 32 teeth. Even if a normal bone is broken, it can regenerate if it has blood vessels inside and the blood supplies nutrients. However, teeth cannot regenerate because blood vessels do not reach the enamel, so care is very important.

[0004] When tooth enamel comes into contact with acid, it gradually loses calcium, but when the acidity in the oral cavity returns to a basic state, the calcium ions in saliva crystallize again in the enamel, gradually repairing it. The surface of the enamel is maintained by repeating calcium loss and repair every day, unless the tooth tissue itself is lost.

[0005] However, bacteria grow by eating food residues left after meals and form dental plaque (plug). Mutans streptococci are one of the bacteria that make up dental plaque, and they increase the acidity of the teeth, corroding them and causing inflammation of the gums. Furthermore, dental plaque prevents calcium ions mixed in saliva from reaching the teeth to repair damaged teeth. Calcium ions that do not reach the teeth are absorbed into the plug and crystallized. The plug that has absorbed calcium and crystallized hardens and adheres to the tooth. This is tartar. Tartar blocks the outside of the enamel, but allows acid to pass through and captures calcium ions, preventing chemical repair of the enamel surface. Tartar formed in this way makes it even more difficult to remove plaque, and the above vicious cycle is repeated. In other words, once a tooth is weakened, no matter how much you wipe it, it will not become stronger. Tartar also becomes a good breeding ground for harmful bacteria, especially gingival bacteria, which can cause inflammation and necrosis of the gums.

[0006] The basic preventative method is to remove plugs and waste products between the teeth by brushing properly. However, because the arrangement of teeth is different for each person, no matter how hard you try to brush your teeth, there will be some areas that are difficult to manage, and if your teeth are not properly aligned, the difficulty of brushing your teeth will increase.

[0007] Therefore, there is a need for an oral irrigator that can maintain oral hygiene regardless of the arrangement of teeth. Summary of the Invention [Problem to be solved by the invention]

[0008] The problems to be solved by the present invention are as follows.

[0009] The first is to provide a handle and mouthpiece that allows for the simultaneous supply of cleaning water and the discharge of contaminated water.

[0010] The second is to provide an inhalation structure capable of smoothly inhaling contaminated water in the oral cavity and preventing damage to the oral mucosa.

[0011] The third objective is to provide a mouthpiece structure that allows smooth inhalation and exhalation even within the narrow space of the oral cavity.

[0012] The object of the present invention is not limited to the above-mentioned objects, and other objects not mentioned will be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0013] To achieve the above object, an oral irrigator according to some embodiments of the present invention may include a mouthpiece that sprays cleaning water into the oral cavity; a core suction portion that sucks in contaminated water, which is a mixture of cleaning water and saliva, from the oral cavity; and a handle having an inlet flow path through which the cleaning water flows, an outlet flow path through which the contaminated water flows, and a diffusion flow path that forms a space through which the cleaning water flows in at least one direction above or below the outlet flow path and supplies the cleaning water to the mouthpiece.

[0014] An oral irrigator according to some embodiments of the present invention includes a mouthpiece that sprays cleaning water into the oral cavity; a core suction section that sucks in contaminated water, which is a mixture of cleaning water and saliva, from the oral cavity; and a handle that forms an inlet flow path through which cleaning water flows, a diffusion flow path that connects the inlet flow path to the mouthpiece, and a discharge flow path through which contaminated water discharged from the core suction section flows, and the handle may include an inlet partition that forms the inlet flow path; a discharge partition that is positioned apart from the inlet partition and forms a discharge flow path; and a connecting partition that connects the discharge partition and the inlet partition, is positioned at an angle based on the center line of the handle in the front-to-rear direction, and linearly reduces the width of the discharge flow path from the rear to the front.

[0015] An oral irrigator according to some embodiments of the present invention may include a handle having an inlet flow path through which cleaning water flows and an outlet flow path through which contaminated water inhaled from the oral cavity flows; a mouthpiece that sprays cleaning water supplied through the handle into the inside of the oral cavity; and a core suction unit having a lower suction hole that inhales contaminated water discharged from the mouthpiece and used to clean the teeth.

[0016] An oral irrigator according to some embodiments of the present invention includes a handle having an inlet flow path through which cleaning water flows and an outlet flow path through which contaminated water inhaled from the oral cavity flows; a mouthpiece that sprays cleaning water supplied through the handle into the inside of the oral cavity; and a core suction unit connected to the mouthpiece and inhales contaminated water discharged from the mouthpiece to clean the teeth, and the core suction unit may have an upper suction hole formed at a position opposite the palate.

[0017] An oral irrigator according to some embodiments of the present invention may include: a handle formed with an inlet flow path through which cleaning water flows and an outlet flow path through which contaminated water inhaled from the oral cavity flows; a mouthpiece that sprays cleaning water supplied through the handle into the inside of the oral cavity and includes a labial surface corresponding portion formed at a position facing the labial surfaces of the teeth, a buccal surface corresponding portion formed at a position facing the buccal surfaces of the teeth, and a tongue surface corresponding portion formed at a position facing the lingual surfaces of the teeth; and a core suction portion that inhales the contaminated water discharged from the mouthpiece and used to clean the teeth from above the user's median sulcus of tongue and has an outer edge that connects with the tongue surface corresponding portion.

[0018] An oral irrigator according to some embodiments of the present invention includes a handle having an inlet flow path through which irrigation water flows; and a mouthpiece having an injection hole through which irrigation water is injected into the inside of the oral cavity, and the mouthpiece may include a lip corresponding portion formed in a position facing the labial surfaces of the teeth; a buccal corresponding portion connected to the lip corresponding portion and formed in a position facing the buccal surfaces of the teeth; a tongue corresponding portion formed in a position facing the lingual surfaces of the teeth; and an intermediation having both ends starting from the connection points between the lip corresponding portion and the tongue corresponding portion and connecting the lip corresponding portion and the tongue corresponding portion.

[0019] An oral irrigator according to some embodiments of the present invention includes a handle having an inlet flow path through which cleaning water flows; and a mouthpiece having an injection hole through which cleaning water is injected into the inside of the oral cavity, the mouthpiece including a lip-corresponding portion formed in a position facing the labial surfaces of the teeth; a buccal-corresponding portion connected to the lip-corresponding portion and formed in a position facing the buccal surfaces of the teeth; a tongue-corresponding portion formed in a position facing the lingual surfaces of the teeth; and an intermediation formed at a position where the 7th, 8th, 9th, and 10th teeth are bitten, connecting the lip-corresponding portion and the tongue-corresponding portion, the lateral end portion including an intermediation connected to the boundary between the buccal-corresponding portion and the tongue-corresponding portion, an outer injection flow path is formed in the lip-corresponding portion and the buccal-corresponding portion, an inner injection flow path is formed in the tongue-corresponding portion, and a diffusion flow path is formed in the intermediation connecting the outer injection flow path and the inner injection flow path.

[0020] An oral irrigator according to some embodiments of the present invention may include a mouthpiece including a labial surface corresponding portion formed at a position opposite the labial surfaces of the teeth, a tongue surface corresponding portion formed at a position opposite the lingual surfaces of the teeth, and an intermediate portion connecting the labial surface corresponding portion and the tongue surface corresponding portion; a core suction portion placed on the user's tongue to suck in contaminated water inside the oral cavity; and a suction pipe placed inside the intermediate portion, forming a concentrated flow path through which contaminated water sucked in from the core suction portion flows, and having a vertical channel that protrudes vertically to form a flow gap vertically with the mouthpiece. Effect of the Invention

[0021] The oral irrigator of the present invention has one or more of the following advantages:

[0022] First, it provides a handle and mouthpiece that allows for the simultaneous supply of cleaning water and the discharge of contaminated water.

[0023] Second, it provides an inhalation structure that can smoothly inhale contaminated water in the oral cavity and prevent damage to the oral mucosa.

[0024] The third is to provide a mouthpiece structure that allows smooth inhalation and exhalation even in the narrow space of the oral cavity.

[0025] The effects of the present invention are not limited to the above effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims. [Brief description of the drawings]

[0026] [Figure 1] This is a diagram in which numbers are written to classify teeth according to their position. [Diagram 2] This is a diagram showing the names of different parts of a tooth. [Diagram 3] FIG. 1 is a perspective view of an oral irrigator according to one embodiment of the present invention. [Figure 4]1 is an exploded perspective view of an oral irrigator according to one embodiment of the present invention; FIG. [Diagram 5] An oblique view showing the lower part of an oral irrigator according to one embodiment of the present invention. [Figure 6] FIG. 2 is a plan view of the underside according to one embodiment of the present invention. [Figure 7a] FIG. 2 is a plan view of the upper portion according to one embodiment of the present invention. [Figure 7b] 7b is a diagram illustrating the upper part of FIG. 7a in comparison with the oral cavity structure of FIG. 1. FIG. [Figure 8] This is an enlarged view of the mouthpiece portion of the oral irrigator shown in Figure 3. [Figure 9] This shows the portion of FIG. 8 from below. [Figure 10] FIG. 2 is a perspective view of a suction pipe according to an embodiment of the present invention. [Figure 11] FIG. 2 is a plan view of a suction pipe according to an embodiment of the present invention. [Figure 12] 5 is a perspective view showing a shape in which a suction pipe is joined to the lower part of FIG. 4. FIG. [Figure 13] FIG. 7 is a plan view showing a shape in which a suction pipe is joined to the lower portion of FIG. 6. [Figure 14] FIG. 8 is a perspective view showing a shape in which a suction pipe is joined to the upper part of FIG. [Figure 15] 13 is a diagram showing an example in which an oral irrigator according to an embodiment of the present invention is bitten by a tooth using a tooth model. [Figure 16a] Figure 15 shows the flow of cleaning water and contaminated water during use. [Figure 16b] FIG. 15 shows the part of the hand that comes into close contact with the mouth guard when in use. [Figure 17] 1 is a perspective view of an oral irrigator according to another embodiment of the present invention. [Figure 18] 1 is an exploded perspective view of an oral irrigator according to another embodiment of the present invention. [Figure 19] An oblique view of the lower part of an oral irrigator according to another embodiment of the present invention. [Figure 20]An oblique view of the upper part of an oral irrigator according to another embodiment of the present invention. [Figure 21] 13 is a perspective view of an oral irrigator according to another embodiment of the present invention, with a suction pipe connected to the upper part thereof. FIG. [Figure 22] This is a cross-sectional view taken along line 22-22 in FIG. [Diagram 23] Figure 22 shows the flow of cleaning water. [Figure 24] A plan view of the lower part of an oral irrigator according to another embodiment of the present invention. [Diagram 25] A plan view of the upper part of an oral irrigator according to another embodiment of the present invention. [Figure 26] This is an enlarged view of the mouthpiece portion of Figure 17. [Figure 27] This shows the mouthpiece of FIG. 26 from below. [Figure 28] FIG. 11 is a perspective view of a suction pipe according to another embodiment of the present invention. [Figure 29] FIG. 29 is a plan view of the suction pipe of FIG. 28. [Diagram 30] FIG. 29 is a bottom view of the suction pipe of FIG. 28. [Diagram 31] This shows the flow of contaminated water through the suction pipe and water diffuser. [Diagram 32] The flow of contaminated water is shown in a part of Figure 24. [Diagram 33] The flow of contaminated water is shown in a part of Figure 25. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] The advantages and features of the present invention, as well as the methods for achieving them, will become apparent from the following detailed description of the embodiments in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and may be embodied in various forms, but the present embodiments are provided to fully disclose the present invention and to allow those skilled in the art to fully understand the scope of the invention, and the present invention is defined only by the claims. The same reference numerals refer to the same elements throughout the specification.

[0028] The present invention will now be described with reference to the drawings.

[0029] Fig. 3 is a perspective view of an oral irrigator 100 according to one embodiment of the present invention. Fig. 4 is an exploded perspective view of an oral irrigator 100 according to one embodiment of the present invention.

[0030] 3 and 4, an oral irrigator 100 according to one embodiment of the present invention includes a main body (not shown) that supplies cleaning water 51 and stores inhaled contaminated water 53, a handle 110 connected to the main body, a mouthpiece 130 connected to the handle 110 and sprays the cleaning water 51, and a core suction unit 150 connected to the mouthpiece 130 and inhales the contaminated water 53.

[0031] The main body may include a plurality of water pumps. The plurality of water pumps generate power to discharge cleaning water 51 to the handle 110 or to suck contaminated water 53 from the core suction unit 150. The water pump generates positive pressure to discharge cleaning water 51 and generates negative pressure to suck contaminated water 53. A plurality of water pumps are provided, one of which generates positive pressure and the other generates negative pressure.

[0032] The handle 110, mouthpiece 130 and core suction portion 150 may be integrally formed.

[0033] The handle 110, the mouthpiece 130, and the core suction part 150 may be formed separately into an upper part 100b and a lower part 100a. The upper part 100b may form the upper side of the handle 110, the mouthpiece 130, and the core suction part 150, and the lower part 100a may form the lower side of the handle 110, the mouthpiece 130, and the core suction part 150. The suction pipe 170 may be disposed between the upper part 100b and the lower part 100a.

[0034] Fig. 5 is a perspective view of the lower part 100a of the oral irrigator 100 according to one embodiment of the present invention. Fig. 6 is a plan view of the lower part 100a according to one embodiment of the present invention. Fig. 7 is a plan view of the upper part 100b according to one embodiment of the present invention.

[0035] 5 to 7, an oral irrigator 100 according to one embodiment of the present invention includes a mouthpiece 130 that sprays cleaning water 51 into the oral cavity; a core suction unit 150 that sucks in contaminated water 53, which is a mixture of cleaning water 51 and saliva, from the oral cavity; and a handle 110 in which an inlet flow path 101 through which the cleaning water 51 flows, a discharge flow path 107 through which the contaminated water 53 flows, and a diffusion flow path 103 that connects the inlet flow path 101 and the mouthpiece 130 are formed, and the lateral width 103d of the diffusion flow path 103 is formed larger than the lateral width 101d of the inlet flow path 101 or the lateral width 107d of the discharge flow path 107.

[0036] The mouthpiece 130 sprays the cleaning water 51 into the oral cavity. The mouthpiece 130 sprays the cleaning water 51 toward the gums and teeth. The contaminated water 53 is a mixture of the cleaning water 51, saliva, plugs, and waste. The core suction part 150 sucks in the contaminated water 53. The core suction part 150 sucks in the contaminated water 53 and discharges the contaminated water 53 to the handle 110. The cleaning water 51 supplied from the main body flows through the inlet flow path 101 formed in the handle 110. The inlet flow path 101 is formed on one side of the handle 110, and the outlet flow path 107 is formed on the other side. The contaminated water 53 sucked from the core suction part 150 flows through the outlet flow path 107.

[0037] At the connection point between the handle 110 and the mouthpiece 130 (downstream 101b of the inflow channel, upstream 107a of the discharge channel), a diffusion channel 103 is formed by expanding the width of the inflow channel 101.

[0038] The cleaning water 51 flowing through one side of the handle 110 is evenly dispersed to the left and right sides of the mouthpiece 130 through the diffusion channel 103. The width of the diffusion channel 103 is larger than the width of the downstream 101b of the inflow channel 101. The lateral width 103d of the diffusion channel 103 is formed to be larger than the combined width of the lateral width 101d of the inflow channel 101 and the lateral width 107d of the discharge channel 107. The width of the diffusion channel 103 is larger than the width of the upstream 107a of the discharge channel 107. The width of the diffusion channel 103 may be the same as or larger than the combined width of the upstream 107a of the discharge channel 107 and the downstream 101b of the inflow channel 101.

[0039] The discharge passage 107 is connected to a suction pipe 170, which will be described later. The diffusion passage 103 is formed at the upper end and / or lower end of the suction pipe 170 as well as at the downstream 101b of the inflow passage 101. The diffusion passage 103 is formed across the suction pipe 170. For example, the inflow passage 101 is formed on the left side of the handle 110, and the diffusion passage 103 is formed starting from the left side of the handle 110, passing through the suction pipe 170, and reaching the right side of the handle 110.

[0040] The discharge flow passage 107 has a shape in which the cross-sectional area of ​​the flow passage decreases from the rear end (upstream 107a of the discharge flow passage 107) to the front end (downstream 107b of the discharge flow passage 107). The upstream 107a of the discharge flow passage 107 is connected to a suction pipe 170. The width of the upstream 107a of the discharge flow passage 107 may decrease toward the downstream.

[0041] A flow path guide 179 is disposed inside the handle 110 at a point where the handle 110 and the mouthpiece 130 are connected, for dividing the cleaning water 51 discharged from the inflow flow path 101 and flowing the cleaning water 51 in different directions. The flow path guide 179 is disposed behind the downstream 101b of the inflow flow path 101. The flow path guide 179 is disposed at the downstream 101b of the inflow flow path 101 and divides the cleaning water 51. The flow path guide 179 is disposed in the diffusion flow path 103. The flow path guide 179 is disposed at a position facing the front teeth and divides the flow direction of the cleaning water 51 into left and right directions of the front teeth. The flow path guide 179 is disposed on the center line C-C' in the length direction (front-rear direction) of the handle 110. The flow path guide 179 is disposed in front of the front teeth. The cleaning water 51 is divided and diffused from in front of the front teeth and is dispersed overall in the mouthpiece 130. The mouthpiece 130 includes a left side lip surface corresponding portion 131a and a right side lip surface corresponding portion 131b formed at a position facing the labial surfaces of the teeth, a left side buccal surface corresponding portion 133a and a right side buccal surface corresponding portion 133b formed at a position facing the buccal surfaces of the teeth, and a left side lingual surface corresponding portion 135a and a right side lingual surface corresponding portion 135b formed at a position facing the lingual surfaces of the teeth, and the flow path guide 179 is positioned so that the cleansing water 51 is divided and flows toward the left side lip surface corresponding portion 131a and the right side lip surface corresponding portion 131b.

[0042] The flow path guide 179 divides the cleansing water 51 supplied from one side of the handle 110. The cleansing water 51 supplied from the inflow flow path 101 passes through the flow path guide 179 toward the lip surface corresponding portion 131. The cleansing water 51 that has passed through the lip surface corresponding portion 131 passes toward the tongue surface corresponding portion 135. A gap is formed between the flow path guide 179 and the left and right inner walls of the handle 110. A portion of the cleansing water 51 passes through the gap toward the left lip surface corresponding portion 131a. A portion of the cleansing water 51 passes through the inclined surface of the flow path guide 179 toward the right lip surface corresponding portion 131b.

[0043] The flow path guide 179 is disposed at an angle on the center line C-C' in the front-rear direction of the mouthpiece 130 and the handle 110. The cleansing water 51 discharged from the inflow flow path 101 diffuses along the flow path guide 179 disposed in the diffusion flow path 103. The cleansing water 51 diffuses along the inclined surface of the flow path guide 179 toward the mouthpiece 130.

[0044] The oral irrigator 100 according to one embodiment of the present invention forms a concentrated flow path 105 through which contaminated water 53 flows, and includes a suction pipe 170 connecting the core suction part 150 and the discharge flow path 107, and the suction pipe 170 is disposed inside the diffusion flow path 103.

[0045] The diffusion flow path 103 and the concentrated flow path 105 are formed to intersect with each other. The suction pipe 170 connects the core suction part 150 and the discharge flow path 107. The suction pipe 170 forms the concentrated flow path 105. The contaminated water 53 sucked by the core suction part 150 flows through the concentrated flow path 105. The concentrated flow path 105 connects the suction pipe 170 and the discharge flow path 107. The suction pipe 170 is disposed within the diffusion flow path 103, and the cleaning water 51 is diffused throughout the mouthpiece 130 via the upper end and / or lower end of the suction pipe 170. The upper end and / or lower end of the mouthpiece 130 and the suction pipe 170 are spaced apart from each other, and a detailed description thereof will be given later.

[0046] The oral irrigator according to one embodiment of the present invention includes a mouthpiece 130 that sprays cleaning water 51 into the oral cavity; a core suction section 150 that inhales contaminated water 53, which is a mixture of cleaning water 51 and saliva, from the oral cavity; and a handle 110 that forms an inlet passage 101 through which the cleaning water 51 flows, a diffusion passage 103 that connects the inlet passage 101 and the mouthpiece 130, and a discharge passage 107 through which the contaminated water 53 discharged from the core suction section 150 flows. The handle 110 includes an inlet partition 111 that forms the inlet passage 101; a discharge partition 117 that is positioned spaced apart from the inlet partition 111 and forms the discharge passage 107; and a connecting partition 113 that is connected to the rear end of the discharge partition 117 and is connected to the rear end of the inlet partition 111.

[0047] The inflow partition 111 is formed extending from the upstream 101a of the inflow passage 101 to the downstream 101b of the inflow passage 101. The connecting partition 113 is connected to the inflow partition 111. The connecting partition 113 is formed extending to the front of the diffusion passage 103. The connecting partition 113 is disposed upstream 107a of the discharge passage 107.

[0048] The connecting partition 113 is formed to extend forward from the upstream 107a of the discharge flow passage 107, and is connected to the discharge partition 117. The connecting partition 113 is disposed at an angle based on the center line CC' in the front-rear direction of the handle 110. The connecting partition 113 forms the upstream 107a of the discharge flow passage 107 wide.

[0049] The connecting partition 113 forms a width of the upstream 107a of the discharge channel 107 wider than that of the downstream 101b of the inflow channel 101. The connecting partition 113 is disposed at an angle.

[0050] The handle 110 includes a connecting partition 113 arranged in a diagonal direction such that the cross-sectional area of ​​the discharge flow passage 107 decreases from the rear end (upstream) to the front end (downstream).

[0051] The handle 110 includes a connecting partition 113 that connects the discharge partition 117 and the inlet partition 111, is inclined with respect to a center line C-C' in the front-rear direction of the handle 110, and linearly reduces the width of the discharge flow passage 107 from the rear (upstream) to the front (downstream). The connecting partition 113 absorbs the impact of the contaminated water 53 that suddenly flows in from the suction pipe 170. The connecting partition 113 reduces vibration generated from the handle 110.

[0052] The oral irrigator according to an embodiment of the present invention includes a suction pipe 170 including a front channel 171 connected to the discharge flow passage 107; a rear channel 173 connected to the core suction part 150; and a bending channel 175 arranged at an angle based on a center line C-C' in the front-rear direction of the handle 110 and connecting the rear channel 173 and the front channel 171. The inclined direction of the connecting partition 113 may be the same as the inclined direction of the bending channel 175. The contaminated water 53 may hit the inclined surface of the bending channel 175 and concentrate on one side in the lateral direction.

[0053] If a sudden change occurs in the flow of contaminated water 53 when the suction pump is started or stopped, a sudden change occurs in the pressure and flow rate, which may cause a water shock phenomenon. Since the pump simultaneously sucks in air and contaminated water 53 present in the oral cavity, the air and contaminated water 53 flow in a mixed state in the discharge flow path 107 and the suction pipe 170. The environment in which the air and contaminated water 53 flow together causes a water shock phenomenon inside the handle 110. The connecting bulkhead 113 reduces the vacuum generating portion on the discharge flow path 107 and gradually reduces the flow path width of the contaminated water 53, thereby mitigating the water shock.

[0054] Fig. 8 is an enlarged view of the mouthpiece 130 of the oral irrigator 100 in Fig. 3. Fig. 9 shows the part of Fig. 8 from below.

[0055] 8 and 9, an oral irrigator 100 according to an embodiment of the present invention includes a handle 110 having an inlet flow path 101 through which cleaning water 51 flows and an outlet flow path 107 through which contaminated water 53 inhaled from the oral cavity flows; a mouthpiece 130 for spraying the cleaning water 51 supplied through the handle 110 into the oral cavity; and a core suction part 150 having an edge surrounded by the mouthpiece 130 for inhaling the contaminated water 53 discharged from the mouthpiece 130 and used to clean the teeth. The core suction part 150 inhales the contaminated water 53. A suction pipe 170 is connected to the core suction part 150 and inhales the contaminated water 53. The suction pipe 170 is connected to the handle 110. The outlet flow path 107 is connected to the suction pipe 170.

[0056] The core suction part 150 is fixed to the mouthpiece 130. The core suction part 150 is disposed on the center line C-C' of the mouthpiece 130. The core suction part 150 is disposed in the center of the mouthpiece 130. The surface where the core suction part 150 and the mouthpiece 130 are joined is curved in a "U" shape. The inside of the mouthpiece 130 is formed in a "U" shape. The core suction part 150 is formed in an approximately circular or elliptical shape, and is joined to the inside of the mouthpiece 130.

[0057] The mouthpiece 130 includes a labial surface corresponding part 131 formed at a position facing the labial surface of the teeth, a buccal surface corresponding part 133 formed at a position facing the buccal surface of the teeth, and a lingual surface corresponding part 135 formed at a position facing the lingual surface of the teeth, and the core suction part 150 is surrounded by the lingual surface corresponding part 135 and placed on the tongue of the user. The lingual surface corresponding part 135 protects weak epithelial cells inside the oral cavity from the suction force of the core suction part 150.

[0058] The core suction part 150 is placed on the tongue of the user. The core suction part 150 is placed in the center of the tongue. The inside of the oral cavity is composed of very thin epithelial cells. The tongue is the strongest muscle in the oral cavity. The core suction part 150 sucks contaminated water from the top of the tongue. The tongue is less likely to be damaged even if it adheres to the core suction part 150. Since the tongue has multiple lingual papillae, multiple air and / or contaminated water passages are formed between the core suction part 150 and the lingual papillae.

[0059] The outer side of mouthpiece 130 forms lip surface corresponding portion 131 and cheek surface corresponding portion 133, and the inner side of mouthpiece 130 forms tongue surface corresponding portion 135. An intermediate portion 137 described later connects tongue surface corresponding portion 135 and lip surface corresponding portion 131. Core suction portion 150 has a lower suction hole 159 formed at a position facing the tongue. Lower suction hole 159 is formed toward the tongue. Lower suction hole 159 is formed below core suction portion 150. Core suction portion 150 has an suction guide portion 153 formed by protruding from the edge of lower suction hole 159 to guide contaminated water 53 to lower suction hole 159.

[0060] The suction guide part 153 prevents the tongue from blocking the lower suction hole 159. The suction guide part 153 separates the tongue from the lower suction hole 159. The suction guide part 153 plays the role of a straw that sucks in the contaminated water 53 present on the tongue. The suction guide part 153 is immersed in the cleaning water 51 or forms a negative pressure in a close distance to the cleaning water 51.

[0061] The lower suction hole 159 includes a first lower suction hole 159a and a second lower suction hole 159b formed behind the first lower suction hole 159a, and the first suction guide portion 153a formed in the first lower suction hole 159a protrudes higher than the second suction guide portion 153b formed in the second lower suction hole 159b. The first suction guide portion 153a formed in the first lower suction hole 159a is formed higher than the tongue surface corresponding portion 135. The first suction guide portion 153a prevents the user's tongue from directly contacting the tongue surface corresponding portion 135. The first suction guide portion 153a separates the user's tongue from the tongue surface corresponding portion 135.

[0062] Contaminated water 53 can flow between the user's tongue and the tongue surface corresponding portion 135. In the inhalation guiding portion 153, a trough 151 through which the contaminated water 53 flows forward is formed. The trough 151 is a gap formed so that the contaminated water 53 can be inhaled even if the inhalation guiding portion 153 is in close contact with the tongue. The trough 151 may be formed forward, i.e., in the direction of the lips.

[0063] The core suction portion 150 includes a "U"-shaped inhalation guide portion 153 that protrudes downward from the edge of the lower inhalation hole 159. The protruding surface of the inhalation guide portion 153 faces forward, and the concave surface faces backward, i.e., toward the uvula. The height of the inhalation guide portion 153 can be gradually decreased from the front to the rear, i.e., from the mouth to the uvula. Considering the shape of the tongue, the height of the inhalation guide portion 153 is usually gradually increased from the tip of the tongue toward the base of the tongue, so that the height of the inhalation guide portion 153 approaches the tongue at its maximum.

[0064] The core suction section 150 has a shape that protrudes forward and is recessed backward, and includes an inhalation guide section 153 formed on the edge of a lower inhalation hole 159. The core suction section 150 has a rear inhalation hole 157 formed at a position facing the uvula. The rear inhalation hole 157 is formed at the rear of the core suction section 150. The rear inhalation hole 157 inhales contaminated water 53 near the uvula. The core suction section 150 has an upper inhalation hole 155 formed at a position facing the palate. The upper inhalation hole 155 is formed on the upper side of the core suction section 150. The upper inhalation hole 155 inhales contaminated water 53 that falls after being sprayed toward the upper jaw.

[0065] An oral irrigator 100 according to an embodiment of the present invention includes a handle 110 having an inlet flow path 101 through which cleaning water 51 flows and an outlet flow path 107 through which contaminated water 53 inhaled from the oral cavity flows, a mouthpiece 130 for spraying cleaning water 51 supplied through the handle 110 into the oral cavity, and a core suction unit 150 connected to the mouthpiece 130 for inhaling contaminated water 53 discharged from the mouthpiece 130 and used to clean the teeth. Contaminated water 53 flows through the core suction unit 150, and cleaning water 51 flows through the mouthpiece 130.

[0066] The mouthpiece 130 and the core suction part 150 are isolated so that the cleaning water 51 and the contaminated water 53 are not mixed. The center of the core suction part 150 is placed on the median sulcus of the tongue of the user. The core suction part 150 is placed on the dorsum of the tongue of the user. The lower end of the core suction part 150 is formed at a position higher than the lower end of the mouthpiece 130, and the upper end of the core suction part 150 is formed at a position lower than the upper end of the mouthpiece 130.

[0067] The core suction part 150 is placed on the tongue and is lower in height than the mouthpiece 130. Therefore, the user is less likely to contact the tongue or palate with the core suction part 150. The lateral periphery of the core suction part 150 is connected to the mouthpiece 130. The edge of the core suction part 150 is connected to the tongue surface corresponding part 135, and the tongue surface corresponding part 135 is higher than the core suction part 150. An upper suction hole 155 is formed on the upper side of the core suction part 150. The mouthpiece 130 encloses the edge of the core suction part 150. The mouthpiece 130 prevents the core suction part 150 from contacting the user's buccal. This structure protects the soft oral mucosa of the user.

[0068] The core suction section 150 has a lower suction hole 159 at a position facing the tongue, an upper suction hole 155 at a position facing the palate, and a rear suction hole 157 at a position facing the uvula, and the lower suction hole 159, the upper suction hole 155, and the rear suction hole 157 are formed in a line in the front-rear direction. The lower suction hole 159, the upper suction hole 155, and the rear suction hole 157 are arranged in a concentrated manner in the center of the user's oral cavity, and these holes are separated by a certain distance from the oral mucosa by the mouthpiece 130. This prevents the oral mucosa from being sucked into these holes and blocking the holes. This structure keeps the suction function of the contaminated water 53 constant.

[0069] Mouthpiece 130 has a front inhalation hole 139 formed in a portion facing the chewing surfaces of the front teeth, and core suction portion 150 has a lower inhalation hole 159 formed in a position facing the tongue, an upper inhalation hole 155 formed in a position facing the palate, and a rear inhalation hole 157 formed in a position facing the uvula, with front inhalation hole 139, lower inhalation hole 159, upper inhalation hole 155, and rear inhalation hole 157 formed in a line on the center line C-C' in the front-to-rear direction.

[0070] The front suction hole 139 is formed at a position close to the lips. The front suction hole 139 sucks in contaminated water 53 near the lips. The front suction hole 139 is formed in an intermediate portion 137, which will be described later. The intermediate portion 137 is formed at a position that contacts the biting surfaces of the front teeth. The front suction hole 139 may be formed on the upper and / or lower side of the mouthpiece 130.

[0071] An oral irrigator 100 according to one embodiment of the present invention includes a handle 110 having an inlet flow path 101 through which cleaning water 51 flows and an outlet flow path 107 through which contaminated water 53 inhaled from the oral cavity flows; a mouthpiece 130 that sprays cleaning water 51 supplied through the handle 110 into the inside of the oral cavity and has a lip surface corresponding portion 131 formed at a position facing the labial surfaces of the teeth, a buccal surface corresponding portion 133 formed at a position facing the buccal surfaces of the teeth, and a left lingual surface corresponding portion 135a and a right lingual surface corresponding portion 135b formed at a position facing the lingual surfaces of the teeth; and a core suction portion 150 that inhales contaminated water 53 discharged from the mouthpiece 130 and used to clean the teeth, the left side being coupled to the left lingual surface corresponding portion 135a and the right side being coupled to the right lingual surface corresponding portion 135b.

[0072] The core suction part 150 is enclosed by the tongue surface corresponding part 135. The core suction part 150 is separated from the oral mucosa of the user. The rear end of the core suction part 150 is disposed forward of the rear end of the cheek surface corresponding part 133. The rear end of the core suction part 150 is disposed forward of the rear end of the tongue surface corresponding part 135. The rear end of the core suction part 150 protrudes less than the mouthpiece 130, and therefore does not interfere with the uvula.

[0073] Fig. 10 is a perspective view of a suction pipe 170 according to an embodiment of the present invention. Fig. 11 is a plan view of a suction pipe 170 according to an embodiment of the present invention. Fig. 12 is a perspective view showing a shape in which the suction pipe 170 is coupled to the lower part 100a of Fig. 4. Fig. 13 is a plan view showing a shape in which the suction pipe 170 is coupled to the lower part 100a of Fig. 6. Fig. 14 is a perspective view showing a shape in which the suction pipe 170 is coupled to the upper part 100b of Fig. 7.

[0074] 10 to 14, an oral irrigator 100 according to one embodiment of the present invention includes a handle 110 having an inlet passage 101 through which cleaning water 51 flows and an outlet passage 107 through which contaminated water 53 inhaled from the oral cavity flows; a mouthpiece 130 connected to the inlet passage 101 and spraying cleaning water 51 into the oral cavity; a core suction unit 150 that inhales contaminated water 53 discharged from the mouthpiece 130 and used to clean the teeth; and a suction pipe 170 through which contaminated water 53 flows and penetrates the mouthpiece 130 to connect the core suction unit 150 to the handle 110.

[0075] The suction pipe 170 passes through the mouthpiece 130. The contaminated water 53 flows from the core suction part 150 to the suction pipe 170. The suction pipe 170 is connected to the discharge flow path 107. The suction pipe 170 passes through the mouthpiece 130 and is connected to the handle 110. The cleaning water 51 flows inside the mouthpiece 130. The suction pipe 170 separates the cleaning water 51 from the contaminated water 53.

[0076] The mouthpiece 130 includes a left side labial surface corresponding portion 131a and a right side labial surface corresponding portion 131b formed at a position facing the labial surface of the teeth, a left side buccal surface corresponding portion 133a and a right side buccal surface corresponding portion 133b formed at a position facing the buccal surface of the teeth, and a lingual surface corresponding portion 135 formed at a position facing the lingual surface of the teeth, and the suction pipe 170 passes through the labial surface corresponding portion 131 and the lingual surface corresponding portion 135 and is connected to the core suction portion 150. The core suction portion 150 is surrounded by the lingual surface corresponding portion 135. The handle 110 is connected to the labial surface corresponding portion 131. The suction pipe 170 passes through the mouthpiece 130 and is connected to the handle 110. The suction pipe 170 includes a vertical channel 177 that protrudes vertically to form a vertical flow gap 190, 290 with the mouthpiece 130. The flow gaps 190, 290 are shown in Figures 5 and 19. The vertical channel 177 is formed at the upper and / or lower end of the suction pipe 170.

[0077] The mouthpiece 130 is formed at a position facing the biting surface of the user's front teeth and forms a front suction hole 139 for sucking in contaminated water 53, and the vertical channel 177 communicates with the front suction hole 139 to form a vertical flow path. The contaminated water 53 that has gathered in the direction of the front teeth moves to the vertical channel 177 through the front suction hole 139. The contaminated water 53 that has flowed into the suction pipe 170 through the vertical channel 177 flows to the handle 110. The mouthpiece 130 includes a vertical protrusion 137a that engages with the vertical channel 177 to form flow gaps 190, 290.

[0078] The flow gap 190 forms a diffusion flow path 103 through which the cleaning water 51 flows across the suction pipe 170. The mouthpiece 130 includes a vertical protrusion 137a that protrudes vertically inwardly and forms the suction pipe 170 and the flow gaps 190, 290 in the vertical direction. The vertical protrusion 137a and the vertical channel 177 are fastened together. The vertical channel 177 and the vertical protrusion 137a form a space between the mouthpiece 130 and the suction pipe 170. This space is the flow gap 190, 290. The cleaning water 51 flows to the upper side and / or lower side of the suction pipe 170 through the flow gaps 190, 290. The cleaning water 51 flows in the opposite direction to the suction pipe 170 through the flow gaps 190, 290.

[0079] The suction pipe 170 includes a front channel 171 connected to the exhaust passage 107 of the handle 110 ; and a rear channel 173 passing through the rear of the mouthpiece 130 and connected to the core suction portion 150 .

[0080] The suction pipe 170 is detachably formed and disposed inside the diffusion channel 103. The suction pipe 170 is disposed at an angle with respect to a center line 173C of the rear channel 173 and a center line 171C of the front channel 171, and includes a bending channel 175 connecting the rear channel 173 and the front channel 171. The bending channel 175 passes through the front of the mouthpiece 130 and is connected to the front channel 171.

[0081] The rear channel 173 and the front channel 171 are formed so that their centerlines are parallel to each other. The inlet channel 101 is formed on one side of the handle 110, the outlet channel 107 is formed on the other side of the handle 110, the core suction part 150 is disposed on the centerline C-C' of the handle 110, and the suction pipe 170 includes the rear channel 173 connected to the core suction part 150; and the front channel 171 connected to the outlet channel 107.

[0082] The oral irrigator 100 according to one embodiment of the present invention includes a suction pipe 170 that connects the core suction portion 150 and the discharge flow path 107.

[0083] The suction pipe 170 is disposed at an inclined angle to the center line CC' of the handle 110, and includes a bending channel 175 connecting between the rear channel 173 and the front channel 171. The bending channel 175 allows the path of the contaminated water 53 to bend.

[0084] Since the core suction part 150 is disposed on the center line C-C' of the handle 110 and the discharge flow passage 107 is disposed on one side of the handle 110, a means for bending the path of the contaminated water 53 is required. The front channel 171 is formed parallel to the flow direction of the discharge flow passage 107. The contaminated water 53 flows inside the suction pipe 170 and the cleaning water 51 flows outside the suction pipe 170, and a flow passage guide 179 for dividing the cleaning water 51 in different directions is disposed on the outer circumferential surface of the suction pipe 170. A diffusion flow passage 103 is formed at the connection point between the handle 110 and the mouthpiece 130.

[0085] The diffusion channel 103 may be provided with a front channel 171 and a bending channel 175. The channel guide 179 may protrude in the vertical direction to form flow gaps 190, 290. The channel guide 179 separates the suction pipe 170 from the mouthpiece .

[0086] The flow gaps 190, 290 are spaces between the mouthpiece 130 and the suction pipe 170. The flow path guide 179 is disposed in the diffusion flow path 103. Although the figure shows that the flow path guide 179 and the suction pipe 170 are integrally formed, the flow path guide 179 may be formed in the handle 110. The suction pipe 170 includes the flow path guide 179 that divides the inflow flow path 101 to allow the wash water 51 to flow in different directions.

[0087] Cleansing water 51 flowing in from one side of the handle 110 flows along the flow path guide 179 toward the other side of the handle 110. When the inflow flow path 101 is formed on the left side of the handle 110, cleansing water 51 discharged from the left side of the handle 110 flows toward the left buccal surface corresponding portion 133a and the left tongue surface corresponding portion 135a. The flow path guide 179 is disposed obliquely behind the inflow flow path 101 so that a portion of the cleansing water 51 flows toward the right lip surface corresponding portion 131b. The flow path guide 179 is disposed obliquely behind the inflow flow path 101 so that a portion of the cleansing water 51 flows toward the right buccal surface corresponding portion 133b.

[0088] The oral irrigator 100 according to one embodiment of the present invention includes a handle 110 having an inlet passage 101 through which cleaning water 51 flows and an outlet passage 107 through which contaminated water 53 inhaled from the oral cavity flows; a mouthpiece 130 connected to the inlet passage 101 and spraying cleaning water 51 into the inside of the oral cavity; a core suction unit 150 for inhaling contaminated water 53 discharged from the mouthpiece 130 and used to clean the teeth; and a suction pipe 170 which forms a concentrated passage 105 inside through which contaminated water 53 flows and forms flow gaps 190, 290 outside between the mouthpiece 130 through which the cleaning water 51 flows, and connects the core suction unit 150 to the handle 110.

[0089] The suction pipe 170 includes a vertical channel 177 that protrudes in a vertical direction and forms flow gaps 190, 290 in the vertical direction with the mouthpiece 130. The mouthpiece 130 includes a vertical protrusion 137a that engages with the vertical channel 177 to form the flow gaps 190, 290. The flow gaps 190, 290 form a diffusion flow path 103 through which the wash water 51 flows across the suction pipe 170. The mouthpiece 130 includes a vertical protrusion 137a that protrudes inwardly in a vertical direction with the suction pipe 170 and forms the flow gaps 190, 290 in the vertical direction.

[0090] The suction pipe 170 is disposed in the diffusion flow path 103. Contaminated water 53 flows inside the suction pipe 170. Cleaning water 51 flows outside the suction pipe 170. Flow gaps 190, 290 are formed between the suction pipe 170 and the upper end and / or lower end of the mouthpiece 130. The cleaning water 51 flows in the opposite direction to the suction pipe 170 through the flow gaps 190, 290.

[0091] The vertical protrusion 137a and the vertical channel 177 form flow gaps 190 and 290. The vertical protrusion 137a and the vertical channel 177 may be coupled to each other to form the flow gaps 190 and 290. The vertical protrusion 137a may be formed on an edge of the front suction hole 139 to connect the front suction hole 139 and the vertical channel 177.

[0092] Referring again to Figures 8 and 9, an oral irrigator 100 according to one embodiment of the present invention includes a handle 110 having an inlet flow path 101 through which cleaning water 51 flows; and a mouthpiece 130 having an injection hole 130a through which cleaning water 51 is injected into the inside of the oral cavity, and the mouthpiece 130 includes a lip-corresponding portion 131 formed at a position facing the labial surface of the teeth; a buccal-surface-facing portion 133 connected to the lip-corresponding portion 131 and formed at a position facing the buccal surface of the teeth; a tongue-corresponding portion 135 formed at a position facing the lingual surface of the teeth; and an intermediation portion 137 whose both ends start from the connection point between the lip-corresponding portion 131 and the tongue-corresponding portion 135 and connect the lip-corresponding portion 131 and the tongue-corresponding portion 135.

[0093] The intermediate part 137 connects the rear surface of the lip surface corresponding part 131 and the front surface of the tongue surface corresponding part 135. The front of the intermediate part 137 is connected to the lip surface corresponding part 131. The rear of the intermediate part 137 is connected to the tongue surface corresponding part 135. The left end of the intermediate part 137 is connected to the boundary between the left lip surface corresponding part 131a and the left buccal surface corresponding part 133a. The right end of the intermediate part 137 is connected to the boundary between the right lip surface corresponding part 131b and the right buccal surface corresponding part 133b. The tongue surface corresponding part 135 is formed in front of the intermediate part 137, and the lip surface corresponding part 131 is formed in the rear of the intermediate part 137. The intermediate part 137 sucks in the contaminated water 53 distributed around the front teeth.

[0094] The mouthpiece 130 includes a buccal surface corresponding portion 133 connected to the tongue surface corresponding portion 131 and formed at a position facing the buccal surfaces of the teeth, and in the space between the tongue surface corresponding portion 135 and the buccal surface corresponding portion 133, a first contraction-permitting hole 132a is formed so that all areas of the biting surfaces of teeth 1, 2, 3, and 4 form an empty space, and a second contraction-permitting hole 132b is formed so that all areas of the biting surfaces of teeth 13, 14, 15, and 16 form an empty space.

[0095] The first contraction allowable hole 132a and the second contraction allowable hole 132b are each formed by a single hole. The first contraction allowable hole 132a and the second contraction allowable hole 132b form boundaries with the intermediate portion 137, the tongue surface corresponding portion 135, and the buccal surface corresponding portion 133, and the rear end portion of the buccal surface corresponding portion 133 forms a free end.

[0096] An outer jet flow passage 134a is formed in the lip surface corresponding portion 131 and the cheek surface corresponding portion 133, an inner jet flow passage 134b is formed in the tongue surface corresponding portion 135, and a diffusion flow passage 103 connecting the outer jet flow passage 134a and the inner jet flow passage 134b is formed in the intermediate portion 137. The diffusion flow passage 103 is formed at the connection point between the handle 110 and the mouthpiece 130 and in the intermediate portion 137. The cleaning water 51 that flows into the diffusion flow passage 103 is dispersed to all points of the mouthpiece 130. The diffusion flow passage 103 connects the handle 110, the lip surface corresponding portion 131, the tongue surface corresponding portion 135, and the cheek surface corresponding portion 133. One end of the cheek surface corresponding portion 133 is fixed to the lip surface corresponding portion 131, and the other end is formed as a free end. The side end 137b of the intermediate part 137 is recessed toward the center so that the cheek surface corresponding part 133 can move elastically in the direction of the lip surface corresponding part 131. The side end 137b of the intermediate part 137 is curved in a "C" shape so that the cheek surface corresponding part 133 can move elastically in the direction of the lip surface corresponding part 131. One end of the cheek surface corresponding part 133 is fixed by the lip surface corresponding part 131. The other end of the cheek surface corresponding part 133 is a free end. The left end and the right end of the intermediate part 137 are curved toward the handle 110. The left end and the right end of the intermediate part 137 facilitate the elastic movement of the cheek surface corresponding part 133. The other end of the cheek surface corresponding part 133 can vibrate or bend freely. The cheek surface corresponding part 133 can vibrate by the kinetic energy of the wash water 51.

[0097] The injection hole 130a is formed in a direction toward the cervix between the crown and gum. The injection hole 130a injects the cleaning water 51 at an angle of 30 degrees to 65 degrees. The injection hole 130a may be formed so as to inject the cleaning water 51 at an angle of 45 degrees. The injection hole 130a injects the cleaning water 51 to the cervical area. The buccal surface corresponding part 133 vibrates to inject the cleaning water 51 around the cervical area. The cleaning water 51 is injected to the crown and gums around the cervical area. The cleaning water 51 does not damage the gums and massages the gums to improve blood flow. The mouthpiece 130 cleans between the crown and gums while being separated from the cervical area.

[0098] FIG. 15 uses a tooth model to show an example in which the oral irrigator 100 according to one embodiment of the present invention is bitten by a tooth.

[0099] 15 and again to FIGS. 4 to 9, an oral irrigator 100 according to one embodiment of the present invention includes a handle 110 having an inlet flow path 101 through which cleaning water 51 flows; and a mouthpiece 130 having an injection hole 130a through which cleaning water 51 is injected into the inside of the oral cavity. The mouthpiece 130 includes a lip corresponding portion 131 formed at a position facing the labial surfaces of the teeth; a buccal corresponding portion 133 connected to the lip corresponding portion 131 and formed at a position facing the buccal surfaces of the teeth; a lingual corresponding portion 135 formed at a position facing the lingual surfaces of the teeth; and an intermediation portion 137 formed at a position where the 7th, 8th, 9th, and 10th teeth are bitten, connecting the lip corresponding portion 131 and the lingual corresponding portion 135.

[0100] The intermediate portion 137 is formed at a position facing the biting surface of the front teeth. The intermediate portion 137 is formed at a position facing the biting surface of the front teeth of the user, and forms a front suction hole 139 that sucks in contaminated water 53 present in the oral cavity. The intermediate portion 137 is bitten by teeth 7, 8, 9, and 10 or teeth 6, 7, 8, 9, 10, and 11. The cleaning water 51 flows between the front teeth. The diffusion flow path 103 is formed between the front teeth. The suction pipe 170 is disposed between the front teeth. The contaminated water 53 flows between the front teeth. The front suction hole 139 is connected to the suction pipe 170, and the front suction hole 139 is formed in a portion facing the front teeth. The front suction hole 139 facing the biting surface of the front teeth forms a strong negative pressure. The front suction hole 139 increases the flow rate around the front teeth to improve cleaning power.

[0101] An oral irrigator 100 according to one embodiment of the present invention includes a handle 110 having an inlet flow path 101 through which cleaning water 51 flows; and a mouthpiece 130 having an injection hole 130a through which the cleaning water 51 flows into the inside of the oral cavity. The mouthpiece 130 includes a lip corresponding portion 131 formed at a position opposite the labial surface of the teeth; a buccal corresponding portion 133 connected to the lip corresponding portion 131 and formed at a position opposite the buccal surface of the teeth; a lingual corresponding portion 135 formed at a position opposite the lingual surface of the teeth; and an intermediation portion 137 formed at a position where the user's anterior teeth are bitten and connecting the lip corresponding portion 131 and the lingual corresponding portion 135.

[0102] The intermediate portion 137 is formed away from the position where teeth No. 1, 2, 3, 4, 12, 13, 14, 15, and 16 are bitten, and the buccal surface corresponding portion 133 forms a free end. The intermediate portion 137 is bitten by teeth No. 7, 8, 9, and 10. The buccal surface corresponding portion 133 may elastically move in the direction of the lingual surface corresponding portion 135.

[0103] The oral irrigator 100 according to one embodiment of the present invention includes a core suction part 150 that is placed on the user's tongue and connected to the lip corresponding part 131 to suck in contaminated water 53 inside the oral cavity; and a suction pipe 170 that is placed inside the intermediate part 137 and forms a concentrated flow path 105 through which the contaminated water 53 sucked in from the core suction part 150 flows.

[0104] The concentrated flow path 105 is formed inside the suction pipe 170. In the concentrated flow path 105, the contaminated water 53 flowing in from the core suction part 150 and the contaminated water 53 flowing in through the vertical channel 177 flow together. The suction pipe 170 includes a mouthpiece 130 protruding in the vertical direction and a vertical channel 177 forming flow gaps 190, 290 in the vertical direction. The flow gaps 190, 290 form a diffusion flow path 103 through which the cleaning water 51 flows between the suction pipe 170 and the mouthpiece 130.

[0105] Fig. 16a shows the flow of cleaning water and contaminated water when used according to Fig. 15. Fig. 16b shows the part of the hand that comes into close contact with the mouth guard when used according to Fig. 15.

[0106] 16a, 16b, and again to FIGS. 12 to 15, an oral irrigator according to one embodiment of the present invention includes a mouthpiece 130 that sprays cleaning water 51 into the oral cavity; a core suction portion 150 that sucks in contaminated water 53, which is a mixture of cleaning water 51 and saliva, from the oral cavity; and a handle 110 that forms an inlet flow path 101 through which the cleaning water 51 flows and a discharge flow path 107 through which the contaminated water 53 discharged from the core suction portion 150 flows, and the handle 110 includes a mouth guard 119 formed on its outer circumferential surface and having an end bent backwards.

[0107] The mouth guard 119 is curved in an arch shape, and one side of the mouth guard 119 is in close contact with the adductor pollicis and the other side of the mouth guard 119 is in close contact with the proximal phalanx of the thumb. The mouth guard 119 has an elliptical shape with each of the lateral ends curved backward. The contaminated water 53 that cannot be sucked into the core suction unit 150 may be sprayed out of the mouth. The mouth guard 119 is placed between the user's mouth and hand to prevent the contaminated water 53 from scattering. The mouth guard 119 prevents contact between the mouth and the hand. The mouth guard 119 increases the contact area with the side of the fist when the user grips the handle 110. The mouth guard 119 allows the user to grip the handle 110 stably.

[0108] The handle 110 includes a mouth guard 119 formed on the outer periphery and with a lateral end curved backward. The handle 110 includes an oval mouth guard 119 formed to protrude along the outer periphery. The mouth guard 119 is formed on the outer periphery of the handle 110. The mouth guard 119 is curved toward the mouthpiece 130, and increases the range of contact with the hand when the user grips the handle 110. The mouth guard 119 enables the user to stably grip the handle 110 with the hand. The mouth guard 119 prevents contact between the hand and the lips. The mouth guard 119 prevents the cleaning water 51 coming out of the mouth from being sprayed forward. The mouth guard 119 is formed on the handle 110, and the user can easily recognize the gripping position. The mouth guard 119 is in close contact with the side of the user's fist.

[0109] The mouth guard 119 is gently curved toward the user's lips. This shape prevents contact between the user's mouth and hands. The mouth guard 119 prevents bacteria from entering the mouth via the hands. The mouth guard 119 is placed in front of the mouth to prevent the splashing of contaminated water 53 that cannot be inhaled and is discharged into the mouth.

[0110] Cleansing water 51 discharged from the main body flows into the handle 110. The cleansing water 51 flows into the upstream 101a of the inflow channel 101. The cleansing water 51 flows toward the downstream 101b of the inflow channel 101. Since the inflow channel 101 is formed on one side (the left side in the drawing) of the handle 110, the cleansing water 51 is discharged toward one side (the left side in the drawing) of the mouthpiece 130. A diffusion channel 103 is formed downstream 101b of the inflow channel 101.

[0111] After entering the diffusion flow channel 103, the cleaning water 51 is distributed to all the flow channels of the mouthpiece 130. A part of the cleaning water 51 flows toward the left side of the mouthpiece 130. Another part of the cleaning water 51 flows toward the right side of the mouthpiece 130. A suction pipe 170 is disposed in the diffusion flow channel 103. Between the suction pipe 170 and the mouthpiece 130, flow gaps 190 and 290 are formed. The cleaning water 51 flows toward the right side of the mouthpiece 130 through the flow gaps 190 and 290.

[0112] A flow path guide 179 may be disposed on the handle 110 or the suction pipe 170. The flow path guide 179 divides the cleansing water 51 into two directions. Therefore, the cleansing water 51 flowing in from the left side of the handle 110 can flow into the right end of the mouthpiece 130. The above-mentioned configuration reduces flow resistance while simultaneously inhaling and discharging the cleansing water 51, and allows the cleansing water 51 to be diffused evenly and smoothly.

[0113] The cleaning water 51 flows to the lip surface corresponding portion 131, the tongue surface corresponding portion 135, and the cheek surface corresponding portion 133. The cleaning water 51 is sprayed into the oral cavity through the spray hole 130a. The cleaning water 51 is sprayed toward the cervical region. The buccal surface corresponding portion 133 is connected to the lip surface corresponding portion 131 on one side like a cantilever, and the other side is formed as a free end. The side end portion 137b of the intermediate portion 137 is curved in a "C" shape so that the buccal surface facing portion 133 can elastically move toward the lip surface corresponding portion 131. The kinetic energy of the cleaning water 51 vibrates the buccal surface corresponding portion 133. Therefore, the buccal surface corresponding portion 133 moves elastically. The vibration of the buccal surface corresponding portion 133 minutely changes the spray direction. That is, the spray target of the cleaning water 51 is minutely changed.

[0114] The cleaning water 51 can stimulate the neck, crown, gums, etc. Changing the direction of the cleaning water 51 spray not only removes foreign objects caught between the teeth, but also massages the gums. Gum massage strengthens gum tissue, improves blood circulation, and enhances the immunity of the gums. Gum massage using the cleaning water 51 does not damage the gums.

[0115] The cleaning water 51 sprayed into the oral cavity mixes with saliva and foreign matter to become contaminated water 53. The oral irrigator 100 must quickly suck in the contaminated water 53. If there is an excessive amount of contaminated water 53 in the oral cavity, the contaminated water 53 will prevent the spraying of the cleaning water 51. Furthermore, if there is an excessive amount of contaminated water 53, the contaminated water 53 may flow into the airway or esophagus. Therefore, it is necessary to quickly remove the contaminated water 53.

[0116] The oral irrigator 100 according to the present invention sucks in the contaminated water 53 from the core suction part 150 and the front suction hole 139. When the user slightly lowers his / her head, the contaminated water 53 can gather near the front teeth. The front suction hole 139 sucks in the contaminated water 53 near the front teeth. The front suction hole 139 may be formed on both the upper and lower sides of the intermediate part 137, but if it is formed on the lower side, the contaminated water 53 sucked in from the core suction part 150 may be discharged. Therefore, it is preferable that the front suction hole 139 is formed on the upper side of the intermediate part 137. Due to the shape of the intermediate part 137, an empty space is formed between the buccal surface corresponding part 133 and the tongue surface corresponding part 135. The empty space allows the contaminated water 53 to easily gather below. The contaminated water 53 gathered below flows to the lower suction hole 159 via the suction guide part 153. The inhalation guiding portion 153 includes a first inhalation guiding portion 153a and a second inhalation guiding portion 153b. The first inhalation guiding portion 153a is higher (protruding) than the tongue surface corresponding portion 135. The tongue comes into contact with the first inhalation guiding portion 153a, and the tongue is no longer in direct contact with the tongue surface corresponding portion 135. The contaminated water 53 can flow in the gap between the tongue and the tongue surface corresponding portion 135, and the contaminated water 53 can flow to the first inhalation guiding portion 153a. Since a valley 151 is formed in the inhalation guiding portion 153, the inhalation guiding portion 153 is not blocked by the tongue. The second inhalation guiding portion 153b is lower in height than the first inhalation guiding portion 153a. The tongue does not block the second inhalation guiding portion 153b. The first inhalation guiding portion 153a formed in the front prevents the tongue from contacting the tongue surface corresponding portion 135 and prevents the tongue from contacting the second inhalation guiding portion 153b. The suction guide portion 153 is formed in a U-shape. This shape increases the contact area with the contaminated water 53 that moves along the median tongue groove formed in the center of the tongue.

[0117] The upper suction hole 155 is disposed in a direction toward the palate, and sucks in the contaminated water 53. Since the contaminated water 53 continues to splash in the oral cavity, the contaminated water 53 is also present on the upper side.

[0118] The height of the core suction portion 150 is lower than that of the tongue surface corresponding portion 135. In addition, the core suction portion 150 is enclosed by the tongue surface corresponding portion 135. The tongue surface corresponding portion 135 functions as a wall that confines the contaminated water 53. In other words, the contaminated water 53 is confined by the tongue surface corresponding portion 135, and the upper suction hole 155 sucks in the contaminated water 53.

[0119] The edge of the core suction part 150 is covered by the mouthpiece 130. This prevents the core suction part 150 from directly contacting the oral mucosa and damaging the soft oral mucosa. The rear suction hole 157 sucks in the contaminated water 53 present near the uvula or the contaminated water 53 that is about to be swallowed into the airway or esophagus via the uvula. The contaminated water 53 sucked in from the core suction part 150 flows into the suction pipe 170. The contaminated water 53 that flows in from the front suction hole 139 flows into the suction pipe 170.

[0120] A concentrated flow path 105 is formed inside the suction pipe 170. The concentrated flow path 105 is connected to the discharge flow path 107. The suction pipe 170 has a vertical channel 177, and the mouthpiece 130 has a vertical protrusion 137a. The vertical channel 177 and the vertical protrusion 137a are connected to each other to form flow gaps 190 and 290. The flow gaps 190 and 290 are gaps that form the diffusion flow path 103. The flow gaps 190 and 290 may form the diffusion flow path 103 while minimizing flow disturbance of the cleaning water 51 even if the suction pipe 170 is disposed in the center.

[0121] The discharge flow passage 107 is formed on one side of the handle 110 (the right side in the figure), and the core suction part 150 is disposed in the center. The suction pipe 170 needs to have a bent section. The bending channel 175 forms the bent part of the concentrated flow passage 105. The bending channel 175 is disposed in the bent part of the suction pipe 170. The bent part causes the contaminated water 53 to tilt to one side. The bent part on the flow path may form a vacuum part. The bend in the flow path and the vacuum forming part increase the water shock phenomenon and the flow resistance. At the upstream 107a of the discharge flow passage 107, there is a part where the discharge flow passage 107 temporarily widens. The inlet partition 111 and the discharge partition 117 are disposed apart, and the connecting partition 113 disposed at an angle connects the inlet partition 111 and the discharge partition 117. The connecting partition 113 temporarily widens the width of the discharge flow passage 107. The upstream 107a of the discharge flow passage 107 is a space that reduces the water shock phenomenon caused by the contaminated water 53 discharged from the suction pipe 170. The upstream 107a of the discharge flow passage 107 is a space that reduces the flow resistance of the contaminated water 53. The contaminated water 53 is discharged to the outside via the downstream 107b of the discharge flow passage 107. The contaminated water 53 may be stored in the main body.

[0122] Fig. 17 is a perspective view of an oral irrigator according to another embodiment of the present invention. Fig. 18 is an exploded perspective view of an oral irrigator according to another embodiment of the present invention. Fig. 19 is a perspective view of the lower part 200a of an oral irrigator according to another embodiment of the present invention.

[0123] 17 to 19, an oral irrigator 200 according to one embodiment of the present invention includes a handle 210 having an inflow passage 201 through which cleaning water 51 flows; and a mouthpiece 230 connected to the inflow passage 201 and having a plurality of spray holes 230a for spraying the cleaning water 51 into the inside of the oral cavity.

[0124] The oral irrigator 200 includes an upper portion 200b and a lower portion 200a. A suction pipe 270 is disposed between the upper portion 200b and the lower portion 200a.

[0125] After flowing into the upstream 201a of the inflow channel 201, the cleaning water 51 flows through the downstream 201b of the inflow channel 201 and the diffusion channel 203 to the mouthpiece 230. The cleaning water 51 flows through the upper and lower sides of the suction pipe 270.

[0126] A core suction part 250 is disposed at the center of the mouthpiece 230. Contaminated water 53 flowing in through the core suction part 250 is discharged to the handle 210 through the suction pipe 270. The contaminated water 53 flows from the upstream 207a of the discharge flow path 207 to the downstream 207b of the discharge flow path 207. The contaminated water 53 is discharged to the main body or to the outside and discarded.

[0127] Figure 20 is a perspective view of the upper part 200b of an oral irrigator according to another embodiment of the present invention. Figure 21 is a perspective view of the upper part 200b of an oral irrigator according to another embodiment of the present invention to which a suction pipe 270 is coupled. Figure 22 is a cross-sectional view of 22-22 in Figure 17. Figure 23 shows the flow of the cleaning water 51 in Figure 22.

[0128] 20 to 23, an oral irrigator 200 according to one embodiment of the present invention includes a handle 210 having an inflow passage 201 through which cleaning water 51 flows, and a mouthpiece 230 connected to the inflow passage 201 and having a plurality of injection holes 230a for injecting cleaning water 51 into the inside of the oral cavity, and a water stopper 236 is formed inside the mouthpiece 230 between the plurality of injection holes 230a.

[0129] Cleansing water 51 flows into the mouthpiece 230. A portion of the cleaning water 51 flows backwards due to the water stopper 236. A plurality of water stoppers are formed, and a portion of the backward flowing cleaning water 51 is discharged to the outside through the ejection hole 230a, and a portion is trapped between the water stoppers 236 and circulates. A plurality of water stoppers 236 are formed, and ejection grooves 230b are formed between the plurality of water stoppers 236, through which the cleaning water 51 flows in the direction of the ejection hole 230a.

[0130] A plurality of water stoppers 236 are formed, and between the plurality of water stoppers 236, injection grooves 230b are formed through which the cleaning water 51 flows in the direction of the injection holes 230a. Injection grooves 230b are formed between the water stoppers 236. The injection grooves 230b are formed separately for each injection hole 230a. The cleaning water 51 trapped between the water stoppers 236 flows to the injection holes 230a through the injection grooves 230b. A plurality of water stoppers 236 are formed, and between the plurality of water stoppers 236, a reservoir 236b is formed for storing the flowing cleaning water 51. The water stoppers 236 are arranged along the flow direction of the cleaning water 51, and form a reservoir 236b that guides a portion of the cleaning water 51 to flow backward.

[0131] The multiple reservoirs 236b may have a gradually increasing volume toward the rear. The reservoirs 236b store wash water 51. Wash water 51 flowing into the reservoirs 236b is partly discharged to the injection holes 230a, partly circulates inside the reservoirs 236b, and partly discharged to the outside and flows to other reservoirs 236b. The water stopper 236 is formed long in the vertical direction, and a flow hole 236a through which the wash water 51 flows is formed in the center. The water stopper 236 is disposed perpendicular to the flow direction of the wash water 51.

[0132] The oral irrigator 200 according to one embodiment of the present invention includes a handle 210 having an inlet passage 201 through which cleaning water 51 flows; and a mouthpiece 230 having a reservoir 236b connected to the inlet passage 201 for storing the cleaning water 51, the reservoir 236b having a spray hole 230a for spraying the cleaning water 51 into the inside of the oral cavity.

[0133] The reservoir 236b is formed with an injection groove 230b for directing the cleaning water 51 in the direction of the injection hole 230a. A plurality of reservoirs 236b are formed, and a water stopper 236 is formed between the reservoirs 236b. At least one injection groove 230b and at least one injection hole 230a are formed in the reservoir 236b. The water stopper 236 is formed with a flow hole 236a through which the cleaning water 51 that exceeds the storage capacity of the reservoir 236b flows to another reservoir 236b. A plurality of water stoppers 236 are formed inside the mouthpiece 230, and a plurality of reservoirs 236b and a plurality of flow holes 236a are formed. The cleaning water 51 that exceeds the capacity of the reservoir 236b flows to the other reservoir 236b via the flow hole 236a.

[0134] An oral irrigator 200 according to one embodiment of the present invention includes a handle 210 having an inlet flow path 201 through which cleaning water 51 flows; and a mouthpiece 230 having a plurality of water stoppers 236 arranged along the flow direction of the cleaning water 51 supplied from the inlet flow path 201 and forming a plurality of reservoirs 236b therein, the reservoirs 236b having at least one spray hole 230a formed therein for spraying the cleaning water 51 into the inside of the oral cavity.

[0135] A plurality of reservoirs 236b are formed along the flow direction of wash water 51. A plurality of water stoppers 236 are formed along the flow direction of wash water 51. The water stoppers 236 are formed vertically so as to circulate the incoming wash water 51 in the vertical direction.

[0136] Fig. 24 is a plan view of the lower part 200a of an oral irrigator according to another embodiment of the present invention. Fig. 25 is a plan view of the upper part 200b of an oral irrigator according to another embodiment of the present invention. Fig. 26 is an enlarged view of the mouthpiece 230 portion of Fig. 17. Fig. 27 shows the mouthpiece 230 of Fig. 26 from the bottom.

[0137] 24 to 27, an oral irrigator 200 according to one embodiment of the present invention includes a handle 210 having an inlet passage 201 through which cleaning water 51 flows and an outlet passage 207 through which contaminated water 53 inhaled from the oral cavity flows; a mouthpiece 230 connected to the inlet passage 201 and spraying cleaning water 51 into the oral cavity; a core suction unit 250 that inhales contaminated water 53 discharged from the mouthpiece 230 and used to clean the teeth; and a suction pipe 270 connecting the core suction unit 250 to the handle 210. Inside the core suction unit 250, water splitters 256a, 256b (spliters) are formed in front of the suction pipe 270 to split the inhaled contaminated water 53.

[0138] The core suction portion 250 has a rear suction hole 257 formed at a position facing the uvula, and the water splitters 256 a and 256 b are disposed between the rear suction hole 257 and the suction pipe 270 .

[0139] The mouthpiece 230 has a front suction hole 239 formed in a portion of the upper teeth that faces the chewing surfaces of the front teeth. Cleansing water 51 is sprayed into the oral cavity through the mouthpiece 230. The core suction section 250 sucks in contaminated water 53 from the oral cavity. The cleaning water 51 sprayed by the mouthpiece 230 mixes with contaminants and saliva in the oral cavity to become contaminated water 53. The contaminated water 53 is inhaled through the core suction section 250. The contaminated water 53 is inhaled through the front suction hole 239 disposed in the intermediate section 237.

[0140] An oral irrigator 200 according to one embodiment of the present invention includes a handle 210 having an inlet passage 201 through which cleaning water 51 flows and an outlet passage 207 through which contaminated water 53 inhaled from the oral cavity flows; a mouthpiece 230 connected to the inlet passage 201 and spraying cleaning water 51 into the oral cavity; a core suction unit 250 that inhales contaminated water 53 discharged from the mouthpiece 230 and used to clean the teeth; and a suction pipe 270 connecting the core suction unit 250 to the handle 210. A damper 238 is formed inside the mouthpiece 230, positioned laterally of the suction pipe 270 to prevent collision with the cleaning water 51.

[0141] The mouthpiece 230 includes a labial surface corresponding portion 231 formed at a position opposite the labial surface of the teeth; a buccal surface corresponding portion 233 connected to the labial surface corresponding portion 231 and formed at a position opposite the buccal surface of the teeth; a lingual surface corresponding portion 235 formed at a position opposite the lingual surface of the teeth; and an intermediary portion 237 whose both ends start from the connection point between the labial surface corresponding portion 231 and the lingual surface corresponding portion 235 and connect the labial surface corresponding portion 231 and the lingual surface corresponding portion 235, and a damper 238 is disposed in the intermediary portion 237.

[0142] The cleaning water 51 that flows in through the inflow passage 201 flows into the diffusion passage 203. The suction pipe 270 is disposed in the intermediate portion 237. The suction pipe 270 is disposed in the diffusion passage 203. The cleaning water 51 collides with the suction pipe 270 disposed in the diffusion passage 203. The damper prevents a direct collision between the suction pipe 270 and the cleaning water 51. The damper prevents the cleaning water 51 from directly colliding with the side of the suction pipe 270. The damper suppresses the suction pipe 270 from vibrating inside the mouthpiece 230.

[0143] The mouthpiece 230 has a front suction hole 239 formed in a portion facing the biting surface of the upper teeth, and a vertical protrusion 237a is formed on the edge of the front suction hole 239, protruding inward to form a gap between the mouthpiece 230 and the suction pipe 270. A diffusion flow path 203 is formed between the upper and lower surfaces of the mouthpiece 230 and the suction pipe 270. The vertical protrusion 237a forms a gap between the mouthpiece 230 and the suction pipe 270.

[0144] Fig. 28 is a perspective view of a suction pipe 270 according to another embodiment of the present invention. Fig. 29 is a plan view of the suction pipe 270 of Fig. 28. Fig. 30 is a bottom view of the suction pipe 270 of Fig. 28.

[0145] 28 to 30, the suction pipe 270 includes a front channel 271 connected to the exhaust flow passage 207 of the handle 210; a rear channel 273 connected to the core suction portion 250; and a bending channel 275 arranged at an angle with respect to a center line 273c of the rear channel and a center line 271C of the front channel, connecting the rear channel 273 and the front channel 271.

[0146] The suction pipe 270 has a vertical channel formed on the upper side of the rear channel 273, which communicates with the front suction hole 239. The suction pipe 270 has a vertical bar 288 formed on the lower side of the rear channel 273, which forms flow gaps 190, 290 between the mouthpiece 230 and the suction pipe 270, through which the wash water 51 flows.

[0147] Figure 31 shows the flow of contaminated water 53 through the suction pipe 270 and the water diffuser 216. Figure 32 shows the flow of contaminated water 53 in a portion of Figure 24. Figure 33 shows the flow of contaminated water 53 in a portion of Figure 25.

[0148] 31 to 33, contaminated water 53 is sucked in from a plurality of positions, such as the lower suction hole 259 and the rear suction hole 257, and flows into the core suction section 250. The water splitters 256a and 256b are disposed in the core suction section 250. The water splitters 256a and 256b split the contaminated water 53 flowing in through the rear suction hole 257. The water splitters 256a and 256b split the cleaning water 51 flowing into the suction pipe 270. The water splitters 256a and 256b increase the flow rate of the contaminated water 53 flowing through the suction pipe 270. The water splitters 256a and 256b make the internal pressure of the suction pipe 270 lower than that of the core suction section 250. The core suction portion 250 has a lower suction hole 259 formed at a position facing the tongue, and the water splitters 256a, 256b are disposed at positions that divide the lower suction hole 259.

[0149] The water splitters 256a and 256b may be formed as separate parts, one above the other. The upper splitters 256a and 256ba are formed in the upper part 200b, and the lower splitters 256a and 256bb are formed in the lower part 200a. The water splitters 256a and 256b split the contaminated water 53 flowing in through the lower suction hole 259. The water splitters 256a and 256b align the flow direction of the contaminated water 53 to increase the flow rate of the contaminated water 53. The water splitters 256a and 256b are formed as the upper splitters 256a and 256ba and the lower splitters 256a and 256bb, respectively, and are coupled to each other, and the lower splitters 256a and 256bb are disposed in the lower suction hole 259.

[0150] An oral irrigator 200 according to one embodiment of the present invention includes a handle 210 having an inlet passage 201 through which cleaning water 51 flows and an outlet passage 207 through which contaminated water 53 inhaled from the oral cavity flows; a mouthpiece 230 connected to the inlet passage 201 and spraying cleaning water 51 into the oral cavity; a core suction unit 250 that inhales contaminated water 53 discharged from the mouthpiece 230 and used to clean the teeth; and a suction pipe 270 connecting the core suction unit 250 to the handle 210. Inside the mouthpiece 230, a water diffuser 216 is disposed for dividing the contaminated water 53 discharged from the suction pipe 270 and supplying it to the outlet passage 207.

[0151] In the suction pipe 270, the contaminated water 53 sucked in from the core suction section 250 and the contaminated water 53 sucked in from the front suction hole 239 flow. The contaminated water 53 flowing in from different directions collide with each other.

[0152] The water diffuser 216 divides the contaminated water 53 discharged from the suction pipe 270. The water diffuser 216 divides the flow direction of the contaminated water 53. The water diffuser 216 reduces collisions between the contaminated water 53. The water diffuser 216 guides the contaminated water 53 so that it has a certain directionality. The water diffuser 216 increases the flow speed of the contaminated water 53 flowing through the discharge flow path 207. The water diffuser 216 makes the pressure of the discharge flow path 207 lower than the pressure of the suction pipe 270.

[0153] 28 and 31, the contaminated water 53 is redirected through bending channel 275. A water diffuser 216 is positioned on the centerline 271C of the forward channel.

[0154] The bending channel 275 is disposed in a straight line toward the upstream 207a direction of the discharge passage 207. The bending channel 275 is disposed at an incline toward the downstream 207b direction of the discharge passage 207. The water diffuser 216 has one side facing the front channel 271 parallel to the center line 271C of the front channel, and the other side is inclined in the same direction as the bending channel 275. The inclination angle of the other side may be the same as the inclination angle of the bending channel 275.

[0155] A part of the contaminated water 53 that has passed through the suction pipe 270 flows along the water diffuser 216. If the angle of the water diffuser 216 is excessively inclined, flow separation of the contaminated water 53 may occur, so it is preferable not to incline the water diffuser 216 excessively.

[0156] The water diffuser 216 and the water splitters 256a and 256b smooth the confluence of the contaminated water 53 and reduce the generation of a vortex wake or turbulent flow. The water diffuser 216 and the water splitters 256a and 256b smooth the confluence of the contaminated water 53 and reduce vibration and noise.

[0157] Although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above. It goes without saying that various modifications can be made by a person having ordinary knowledge in the technical field to which the invention pertains without departing from the gist of the present invention as claimed in the claims, and such modifications should not be understood individually from the technical ideas and perspectives of the present invention.

Claims

1. A mouthpiece including: a lip surface corresponding part formed at a position facing the lip surface of a tooth; a tongue surface corresponding part formed at a position facing the tongue surface of a tooth; and an intermediate part connecting the lip surface corresponding part and the tongue surface corresponding part; a handle having an inlet flow path through which cleaning water flows into the mouthpiece and an outlet flow path through which contaminated water inhaled from the oral cavity flows; and A plurality of lower suction holes for sucking in contaminated water in the oral cavity are formed, and a space is formed where the contaminated water flowing in from the plurality of lower suction holes joins together, and the space where the contaminated water joins together includes a core suction part connected to the tongue surface corresponding part, The tongue surface corresponding portion is "U" shaped, An oral irrigator in which the core suction portion is arranged along the front-to-back center line of the mouthpiece, and the front, left and right sides are connected to the tongue surface corresponding portion to form a ``U''-shaped contact surface.

2. A handle having an inlet flow path for cleaning water and an outlet flow path for contaminated water inhaled from the oral cavity; A mouthpiece that sprays cleaning water supplied through the handle into the oral cavity, and includes a lip surface corresponding portion formed at a position facing the lip surfaces of the teeth, a buccal surface corresponding portion formed at a position facing the buccal surfaces of the teeth, and a tongue surface corresponding portion formed at a position facing the tongue surfaces of the teeth; and The oral irrigator includes a core suction portion that sucks in contaminated water discharged from the mouthpiece and used to clean the teeth from above the user's mid-lingual groove and has an outer edge that connects with the tongue surface corresponding portion.

3. A handle having an inlet flow path for cleaning water and an outlet flow path for contaminated water inhaled from the oral cavity; A mouthpiece that sprays rinse water supplied through the handle into the oral cavity; and a core suction part having a lower suction hole formed therein for sucking in contaminated water discharged from the mouthpiece and used to clean teeth; The lower suction hole is shaped on the center line of the mouthpiece in the front-to-rear direction.

4. A handle having an inlet flow path for cleaning water and an outlet flow path for contaminated water inhaled from the oral cavity; A mouthpiece that sprays rinse water supplied through the handle into the oral cavity; and a core suction part connected to the mouthpiece for inhaling contaminated water discharged from the mouthpiece and used to clean teeth; The oral irrigator has an upper suction hole formed in the core suction portion at a position opposite to the palate.

5. A mouthpiece that sprays rinse water into the mouth; A core suction part that inhales the contaminated water discharged from the mouthpiece and used to clean the teeth, and is placed on the user's tongue; A handle having an inlet flow path through which cleaning water flows and an outlet flow path through which contaminated water flows; and A section pipe is disposed inside the mouthpiece and connects the core suction portion and the exhaust path, The handle is An oral irrigator comprising a connecting partition disposed at a point where contaminated water discharged from the section pipe is discharged, and inclined on a center line in the front-to-rear direction of the mouthpiece and the handle so that a cross-sectional area of ​​the flow path decreases from the rear end to the front end.

6. A handle having an inlet passage through which cleaning water flows; and The mouthpiece includes a nozzle for spraying cleaning water into the oral cavity, The mouthpiece includes a lip corresponding portion formed at a position facing the lip surfaces of the teeth, a buccal corresponding portion connected to the lip corresponding portion and formed at a position facing the buccal surfaces of the teeth, a tongue corresponding portion formed at a position facing the tongue surfaces of the teeth, and an intermediate portion formed at a position where the 7th, 8th, 9th, and 10th teeth are bitten, connecting the lip corresponding portion and the tongue corresponding portion, and a lateral end portion connected to a boundary between the buccal corresponding portion and the tongue corresponding portion, An outer injection flow passage is formed in the lip surface corresponding portion and the cheek surface corresponding portion, An inner injection flow passage is formed in the tongue surface corresponding portion, The oral irrigator has a diffusion passage formed in the intermediate portion, the diffusion passage connecting the outer injection passage and the inner injection passage.

7. A handle having an inlet passage through which cleaning water flows; and a mouthpiece connected to the inlet path and having a plurality of spray holes for spraying the cleaning water into the oral cavity; The mouthpiece is provided with a plurality of water stoppers for guiding a part of the cleaning water to flow backward along the direction of the cleaning water flow.

8. The water stopper is forming a reservoir arranged along the flow direction of the cleaning water to induce a part of the cleaning water to flow backward; The storage facility includes: The oral irrigator of claim 7 , wherein the plurality of storage chambers are formed so that their volumes gradually increase toward the rear.

9. a handle having an inlet passage through which cleaning water flows; a mouthpiece connected to the handle and having a plurality of spray holes formed therein for spraying the cleaning water supplied from the inflow path; and a plurality of water stoppers disposed inside the mouthpiece and protruding in a direction perpendicular to the direction of flow of the cleaning water to form a plurality of reservoirs; An oral irrigator, wherein at least one injection hole is formed in each of the reservoirs.

10. said mouthpiece being "U" shaped; The oral irrigator according to claim 9 , further comprising a core suction portion that is disposed on a center line of the mouthpiece in the front-rear direction, is surrounded by the mouthpiece, and is disposed at the center of the user's tongue.

11. A handle having an inlet flow path for washing water and an outlet flow path for contaminated water inhaled from the oral cavity; a mouthpiece connected to the inlet flow channel for spraying rinse water into the oral cavity; and a core suction part for inhaling contaminated water discharged from the mouthpiece and used to clean teeth; The oral irrigator further includes a splitter formed inside the core suction portion in a direction toward the handle for dividing the sucked contaminated water and reducing vortexes.

12. A mouthpiece that sprays cleaning water into the mouth; A core suction part that sucks in the contaminated water discharged from the mouthpiece and used to clean the teeth; and a suction pipe connecting the core suction portion and the handle, The oral irrigator further comprises a damper disposed inside the mouthpiece and disposed laterally of the suction pipe for preventing collision between the cleaning water and the suction pipe.

13. The mouthpiece comprises: a lip-surface corresponding part formed at a position facing the lip surface of the tooth; a cheek-surface corresponding part connected to the lip-surface corresponding part and formed at a position facing the cheek surface of the tooth; a tongue-surface corresponding part formed at a position facing the tongue surface of the tooth; and an intermediate part having both ends starting from a connection point between the lip-surface corresponding part and the tongue-surface corresponding part and connecting the lip-surface corresponding part and the tongue-surface corresponding part; The oral irrigator of claim 12 , wherein the damper is disposed in the intermediate portion.

14. A handle having an inlet flow path for cleaning water and an outlet flow path for contaminated water inhaled from the oral cavity; A mouthpiece connected to the inflow path for spraying cleaning water into the oral cavity; and a core suction part that inhales contaminated water discharged from the mouthpiece to clean teeth and discharges the contaminated water in the direction of the discharge flow path; The mouthpiece includes a water diffuser disposed inside the mouthpiece, the water diffuser dividing contaminated water between the core suction portion and the discharge passage to reduce vortexes.

15. The apparatus further includes a suction pipe that connects the core suction part and the handle and through which contaminated water flows, The suction pipe is a forward channel connected to an exhaust passage of the handle; a rear channel connected to the core suction section; and a bending channel disposed at an angle relative to a centerline of the rear channel and a centerline of the forward channel, the bending channel connecting the rear channel and the forward channel; The oral irrigator of claim 14 , wherein the water diffuser is positioned on the centerline of the front channel.

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