Oral cavity washing head

Abstract

The utility model relates to the field of flushing, in particular to an oral cavity flushing head which is used for flushing the interior of a root canal and comprises a flushing needle. A water flow channel is formed in the washing needle, so that water flow can flow in the water flow channel. The flushing needle comprises a body part and a flushing end part. The flushing end part is connected with the body part, and the flushing end part is used for extending into the root canal to flush the inner side wall of the root canal. A first water outlet hole and a second water outlet hole are formed in the side wall of the flushing end part, and the first water outlet hole and the second water outlet hole are formed in the two opposite sides of the flushing end part respectively. The first water outlet hole and the second water outlet hole are both communicated with the water flow channel, and water flow in the water flow channel is discharged through the first water outlet hole and the second water outlet hole. Water or cleaning liquid flowing out of the first water outlet hole and the second water outlet hole can form vortexes in the root canal, the vortexes can powerfully flush the inner side wall of the root canal, dirt adsorbed in the root canal is flushed away from the wall of the root canal, and therefore the inner side wall of the root canal is better cleaned.

Description

Technical Field

[0001] This patent relates to the field of oral irrigation, and in particular to an oral irrigation head. Background Art

[0002] Root canal therapy is a common dental treatment. Its goal is to remove infected material and dead tissue from the tooth to prevent bacteria from re-invading and causing pain and other problems. During root canal therapy, the doctor uses specialized tools and techniques to remove these materials from the tooth. Flushing with water and disinfectants effectively cleans the inside of the root canal.

[0003] Furthermore, even after the infection and necrotic tissue inside the tooth have been removed, bacteria may still remain on the tooth surface or within the root canal. Without proper flushing, these bacteria can re-enter the tooth and cause the infection to recur. Therefore, during root canal treatment, the doctor will use high-pressure water or other disinfectants to thoroughly flush the tooth to ensure the complete removal of bacteria.

[0004] Furthermore, after root canal treatment, the tissues inside the tooth need time to heal. During this process, if bacteria remain inside the tooth, they may interfere with the healing process and cause pain and other problems. Therefore, regular flushing is necessary during root canal treatment to promote healing and minimize discomfort.

[0005] The inventors of the present application have discovered that the flushing head of the prior art has a problem in which the flushing force of multiple water outlets is uneven, resulting in a poor flushing effect. Utility Model Content

[0006] In order to solve or at least partially solve the above-mentioned technical problems, the present patent provides an oral irrigator for flushing the inside of a root canal, the oral irrigator comprising: a irrigator needle. The inside of the irrigator needle is provided with a water flow channel so that water can flow in the water flow channel. The irrigator needle comprises: a main body and a irrigating end. The irrigating end is connected to the main body, and the irrigating end is used to extend into the inside of the root canal to flush the inner wall of the root canal. A first water outlet hole and a second water outlet hole are provided on the side wall of the irrigating end, and the first water outlet hole and the second water outlet hole are respectively located on opposite sides of the irrigating end. The first water outlet hole and the second water outlet hole are both connected to the water flow channel, and the water in the water flow channel is discharged from the first water outlet hole and the second water outlet hole respectively.

[0007] Preferably, the diameter of the first water outlet gradually increases from the inside to the outside, and / or the diameter of the second water outlet gradually decreases from the inside to the outside.

[0008] Preferably, the flushing end protrudes at the end of the water flow channel and forms a water diversion prism, which divides the water flow channel into two parts connected to the first water outlet and the second water outlet, respectively. The water diversion prism has two guide surfaces corresponding to the first water outlet and the second water outlet, and the height of the guide surfaces gradually decreases from the middle of the water diversion prism to the middle of the water diversion prism.

[0009] Preferably, the guide surface is an inwardly concave curved surface.

[0010] Preferably, the diameter of the water flow channel gradually increases from the side close to the flushing end toward the side away from the flushing end.

[0011] Preferably, the width of the first water outlet is 0.05mm-0.1mm;

[0012] The diameter of the flushing end is 0.35mm-0.4mm;

[0013] The main body is tapered, and the diameter of the main body gradually increases from the connection with the flushing end line. The taper of the main body is 2%-6%;

[0014] Scale marks are evenly distributed on the outer surface of the main body along its length direction to indicate the amount of liquid in the main body.

[0015] Preferably, the oral irrigating head further comprises: a connector having a water outlet and a water inlet, the water outlet being connected to the irrigating needle, the water inlet being connected to the irrigating device, and the water outlet and the water inlet being not in the same straight line.

[0016] Preferably, the angle between the water outlet and the water inlet is 45°-90°.

[0017] Preferably, the outer surface of the flushing end is distributed with reinforcing ribs extending to the main body, the reinforcing ribs are strip-shaped, and the thickness of the cross section of the reinforcing ribs is 0.4-0.6 times the wall thickness of the flushing needle.

[0018] Preferably, an anti-backflow valve is provided at the connection between the main body and the flushing end portion to prevent the backflow of liquid flowing from the main body to the flushing end portion.

[0019] Compared with the existing technology, this patent innovatively sets two opposite water outlet holes at the flushing end of the flushing needle. This design allows water to flow out from the first water outlet and the second water outlet respectively. Compared with the design of a single water outlet, the water flow pressure of each water outlet is effectively diverted, thereby significantly reducing the impact force on the inner wall of the root canal, thereby reducing the patient's pain during the flushing process. In addition, this oppositely designed water outlet hole can form a unique vortex effect in the root canal during flushing. This vortex of water flow can repeatedly flush the inner wall of the root canal to achieve deeper cleaning. At the same time, the design of two symmetrical water outlet holes also gives the flushing needle higher adaptability. Whether it is a straight or curved root canal, it can be effectively cleaned, ensuring the comprehensiveness and efficiency of the treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the embodiments of this patent, the following briefly introduces the relevant drawings. It is understood that the drawings described below are only used to illustrate some embodiments of this patent, and those skilled in the art can also obtain many other technical features and connection relationships not mentioned herein based on these drawings.

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of an oral irrigator according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of an oral irrigator according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of an oral irrigator according to an embodiment of the present invention;

[0024] Figure 4 It is a three-dimensional schematic diagram of a flushing end of an embodiment of the present patent;

[0025] Figure 5 It is a three-dimensional schematic diagram of a flushing end of an embodiment of this patent.

[0026] Description of reference numerals:

[0027] 1. Flush needle; 11. Main body; 111. Scale mark; 12. Flush end; 121. First water outlet; 122. Second water outlet; 123. Water diversion prism; 124. Guide surface; 2. Connector; 21. Water inlet; 22. Water outlet; 3. Reinforcement rib. DETAILED DESCRIPTION

[0028] The following is a detailed description of this patent in conjunction with the accompanying drawings.

[0029] In the prior art, the root canal needs to be flushed and cleaned during root canal treatment, mainly by inserting a flushing head into the root canal and applying high pressure to cause water to flow out of the hole at the end of the flushing head to clean the root canal wall.

[0030] Currently, the water outlets of irrigation needles are all staggered up and down to allow water to flow out from the outlets. However, the water discharge force generated by these irrigation needles is different and cannot form an effective spiral water flow in the same plane to flush the inner wall of the root canal.

[0031] In view of this, the first embodiment of this patent proposes a medical cart to solve the above technical problems.

[0032] First embodiment

[0033] refer to Figure 1 、 Figure 2 、 Figure 3 The patent shown provides an oral flushing head for flushing the inside of the root canal, and the oral flushing head includes: a flushing needle 1. The flushing needle 1 has a water flow channel inside so that water can flow in the water flow channel. The flushing needle 1 includes: a main body 11 and a flushing end 12. The flushing end 12 is connected to the main body 11, and the flushing end 12 is used to extend into the root canal to flush the inner wall of the root canal. A first water outlet hole 121 and a second water outlet hole 122 are provided on the side wall of the flushing end 12, and the first water outlet hole 121 and the second water outlet hole 122 are respectively located on opposite sides of the flushing end 12. The first water outlet hole 121 and the second water outlet hole 122 are both connected to the water flow channel, and the water in the water flow channel is discharged from the first water outlet hole 121 and the second water outlet hole 122 respectively.

[0034] When using the oral irrigator to clean the root canal, part of the irrigating needle 1 will extend into the interior of the root canal. The cleaning liquid flows into the water flow channel from the liquid supply device, and passes through the main body 11 along the water flow channel to the irrigating end 12, and flows out from the first water outlet 121 and the second water outlet 122. Among them, the first water outlet 121 and the second water outlet 122 are respectively located on opposite sides. Such a design can ensure that when irrigating the inside of the root canal, the water flow can act from two directions at the same time, covering a wider area. In order to obtain the best effect, the appropriate water pressure intensity should be adjusted according to the specific situation of the patient. The water pressure intensity should not be too strong so as not to cause discomfort or damage to sensitive parts, nor too weak so that residues cannot be completely removed. The use of this multi-angle spraying method not only helps to clean hard-to-reach places more comprehensively, but also enhances the decontamination ability by forming a slightly rotating flow pattern, while reducing the potential risk of damage to the tooth structure. Moreover, since the first water outlet 121 and the second water outlet 122 are opposite to each other, most of the outflowing water is located in the same plane perpendicular to the length direction of the flushing needle 1. The two streams of water flow in the root canal and form a vortex after touching the inner wall of the root canal to flush the inner wall of the root canal, so as to clean the inner wall of the root canal more comprehensively.

[0035] Furthermore, the water is discharged through the first water outlet 121 and the second water outlet 122. This separates the concentrated water flow in the water channel. This uniform water flow distribution helps avoid excessive local pressure on the root canal wall, achieving better cleaning of the root canal wall while reducing the risk of damage to the tooth structure.

[0036] Furthermore, to allow the oral irrigator to be pre-bent for insertion into the root canal for treatment, some embodiments utilize edible PP. PP is a relatively soft material that can be pre-bent to conform to the shape of the root canal, allowing for better root canal cleaning by fully inserting the irrigator.

[0037] In addition, reference Figure 4 As shown, the diameter of the first water outlet hole 121 gradually increases from the inside to the outside. And / or, the diameter of the second water outlet hole 122 gradually decreases from the inside to the outside.

[0038] When the apertures of the first water outlet 121 and the second water outlet 122 gradually increase from the inside to the outside, this design can effectively increase the kinetic energy of the water flow, allowing the water to flow out more smoothly. When the water flows through the gradually expanding aperture, the flow rate will gradually increase, thereby improving the efficiency of the water outlet. The inner wall of the root canal needs a stable water flow to flush its surface during cleaning to ensure that the cleaning liquid can cover every corner of the inner wall of the root canal. As the aperture gradually increases from the inside to the outside, the trumpet shape formed by the water outlet helps to enhance the stability of the water flow and prevent the water flow from fluctuating or shaking during the outflow process, thereby ensuring the continuity and stability of the cleaning liquid. In this way, a stable vortex can be formed in the root canal to repeatedly flush the inner wall of the root canal, which is suitable for routine situations during the root canal cleaning process.

[0039] As the apertures of first and second water outlet holes 121, 122 gradually decrease from the inside out, the water flow slows as it passes through the shrinking apertures, but the pressure increases, thereby enhancing the impact of the water flow. When dirt or bacteria on the inner wall of the root canal are stubborn and difficult to flush, the pressurized water flow can better act on the stubborn dirt, causing it to fall off the inner wall of the root canal. Furthermore, the smaller aperture limits the amount of water that can pass through, thereby achieving precise control of the flow rate and direction of the water flow.

[0040] Furthermore, when the first water outlet 121 and the second water outlet 122 are of different sizes, the doctor can use the irrigation needle to flush the root canal and choose to direct the larger or smaller hole toward the target area for flushing and cleaning, depending on their needs. This design can adapt to different flushing conditions within the root canal. When encountering stubborn dirt, the doctor can direct the smaller end of the water outlet toward the target dirt to enhance the impact of the water flow and the cleaning effect.

[0041] At the same time, if Figure 4 As shown, the flushing end 12 is raised at the end of the water flow channel to form a water diversion prism 123. The water diversion prism 123 divides the water flow channel into two parts, which are respectively connected to the first water outlet 121 and the second water outlet 122. The water diversion prism 123 has two guide surfaces 124 corresponding to the first water outlet 121 and the second water outlet 122. The height of the guide surfaces 124 gradually decreases from the middle of the water diversion prism 123 to the middle of the water diversion prism 123.

[0042] The flushing end 12 is raised at the end of the water flow channel and forms a water-dividing prism 123, which evenly divides the water flow into two streams. This design ensures that the water flow can be evenly distributed when passing through the first water outlet 121 and the second water outlet 122, so that the water output of the two water outlets is the same. When the flushing end 12 is located in the root canal, the same water output can ensure the formation of a vortex. Furthermore, the design of the water-dividing prism 123 allows the water flow to maintain a high speed and impact force after diversion. The height of the guide surface 124 gradually decreases from the middle of the water-dividing prism 123 toward the middle of the water-dividing prism 123 away from the water-dividing prism 123. The height here refers to the distance from the water-dividing prism 123 to the end of the flushing end 12. The guide surface 124 guides the cleaning liquid from the water flow channel to the outside of the first water outlet 121 or the second water outlet 122. This structure ensures that the direction of the water flow remains consistent, avoiding dispersion during the flow process, thereby enhancing the impact force of the water flow in the two water outlets and effectively improving the cleaning effect of the formed vortex.

[0043] Furthermore, in some embodiments, the guide surface 124 is an inwardly concave curved surface. Compared to a flat curved surface, a concave curved surface can better control the direction and flow of water flow, reduce fluctuations and instability of water flow during the diversion process, and thus improve the stability of the formed vortex structure.

[0044] In addition, the diameter of the water flow channel gradually increases from the side close to the flushing end 12 to the side away from the flushing end 12 .

[0045] In order for the cleaning fluid flowing out of the first and second water outlets 121, 122 to form an effective flushing vortex within the root canal, it is necessary to ensure that the cleaning fluid has sufficient pressure and energy. The cleaning fluid in the water flow channel gradually flows from a section away from the flushing end toward the flushing end, and the diameter of the water flow channel gradually decreases as the cleaning fluid flows. At this time, due to the squeezing effect of the water flow channel, the flow rate gradually slows, but the pressure increases, thereby increasing the energy obtained by the cleaning fluid, ensuring that the cleaning fluid forms a vortex with a flushing effect when it flows out of the water outlet.

[0046] Specifically, the width of the first water outlet 121 is 0.05mm-0.1mm, and the diameter of the flushing end 12 is 0.35mm-0.4mm. The main body 11 is tapered, with its diameter gradually increasing from the point of connection with the flushing end 12. The taper of the main body 11 is 2%-6%. Graduation marks 111 are evenly distributed along the outer surface of the main body 11 along its length to indicate the amount of liquid within the main body 11.

[0047] The diameter of the irrigation end 12 must ensure that it can be smoothly inserted into the root canal for irrigation treatment, and avoid the irrigation end being unable to enter the target root canal due to being too large. The size of the water outlet must not only consider the flow rate of the cleaning liquid, but also prevent the structural strength of the irrigation end 12 from being reduced due to the water outlet being too large. Furthermore, since most root canals are conical in shape, when the main body 11 is also conical and the taper is between 2% and 6%, it can match most root canals, allowing the main body 11 to smoothly extend into the root canal. Since the main body 11 and the root canal are both conical, the distance difference between the outer surface of the main body 11 and the inner wall of the root canal in each plane perpendicular to the length direction of the main body 11 is small, so that each plane is subjected to the same extrusion when the vortex flows, avoiding the problem of the vortex being unable to form due to the inner wall of the root canal and the outer surface of the main body 11 being too large. Furthermore, compared to designs where the main body 11 is cylindrical to ensure the irrigator can reach the root canal, the conical main body 11 has a wider water channel diameter, allowing for a greater volume of water to flow per unit time. The graduated scale 111 provides real-time feedback on the amount of cleaning fluid or water flowing into the oral irrigator, preventing the cleaning fluid from running out and being unable to be replenished in time, which could affect treatment progress.

[0048] Second embodiment

[0049] In the first embodiment, the rinsing end 12 of the oral irrigator is provided with two opposing first and second water outlet holes 121 and 122, so as to form a vortex inside the root canal during cleaning, thereby better cleaning the inner wall of the root canal. However, due to the linear design of the entire oral irrigator, when used with some root canals located deep in the mouth or at unusual angles, the oral irrigator is difficult to adjust the angle to fully extend into the root canal due to the limited size of the oral cavity, which may adversely affect the irrigating effect.

[0050] In view of this, in the second embodiment of the present application, improvements are made based on the first embodiment. The main improvement is that the oral flushing head also includes: a connecting head 2, having a water outlet 22 and a water inlet 21, the water outlet 22 is connected to the flushing needle 1, and the water inlet 21 is connected to the flushing device, and the water outlet 22 and the water inlet 21 are not on the same straight line.

[0051] By providing a connector 2, the cleaning liquid is diverted from the water inlet 21 to the water outlet 22, thereby changing the orientation of the flushing needle 1 relative to the flushing device. When it is necessary to flush the root canals of the teeth inside the oral cavity, the curved cavity flushing head can allow the flushing needle 1 to be inserted into the oral cavity, and the flushing end of the flushing needle 1 can be fully inserted into the root canal and reach the treatment depth. This structure is specially designed to avoid the problem of the flushing device being too long after being connected to the oral flushing head, resulting in the inability to extend into the target root canal. More specifically, the angle between the water outlet 22 and the water inlet 21 is 45°-90°. Generally speaking, under normal circumstances, the angle at which the upper and lower jaws of an adult's mouth are opened is about 45 degrees. Therefore, in order to match this, the angle between the water outlet 22 and the water inlet 21 needs to be controlled so that the flushing needle can accurately extend into the root canal. In order to better match the oral cavity of the general public, the angle between the water outlet 22 and the water inlet 21 is preferably set to 60°, so as to ensure that it can penetrate into the innermost teeth of the oral cavity to meet the treatment needs.

[0052] This design is based on the vortex generation mechanism in fluid dynamics, which enhances the cleaning effect by allowing the water flow to interact in a specific way. At the same time, ergonomic factors were fully considered during the design process, making the product more flexible and easy to use, suitable for people of different ages.

[0053] Third embodiment

[0054] Two oral irrigating heads for root canal irrigation are disclosed in the first and second embodiments, respectively. In both embodiments, the irrigation end 12 is provided with a first water outlet 121 and a second water outlet 122, which are opposite to each other. Because the first water outlet 121 and the second water outlet 122 are located in the same plane perpendicular to the length of the irrigation end 12, the structural strength of the irrigation end 12 is reduced. In the case of some irrigation devices providing a large water flow, the irrigation end 12 may deform, causing deformation of the first water outlet 121 and the second water outlet 122, affecting the irrigation effect.

[0055] In view of this, in the third embodiment of the present application, improvements are made based on the first embodiment and the second embodiment. The main improvements are: Figure 5 The outer surface of the flushing end 12 is provided with reinforcing ribs 3 extending to the main body 11 . The reinforcing ribs 3 are strip-shaped, and the thickness of the cross section of the reinforcing ribs 3 is 0.4-0.6 times the wall thickness of the flushing needle 1 .

[0056] By adding reinforcing ribs 3 to the outer surface of the flushing end 12, the thickness of the reinforced part of the flushing end 12 is increased, making it difficult to bend, thereby enhancing the structural strength of the flushing end 12. In addition, the cross-section of the strip reinforcing ribs 3 is circular or semicircular. Due to the circular arc surface, there are no sharp corners on the surface of these strip reinforcing ribs 3, presenting a smooth outer surface. The reinforcing ribs 3 with smooth surfaces can reduce the resistance encountered during vortex flow in the root canal, reduce the energy consumption of the vortex, and enable the vortex to better act on the inner wall of the root canal. In particular, the height of the cross-section of the reinforcing rib 3 is designed to be between 0.4 and 0.6 times the wall thickness of the flushing needle 1. This ratio ensures sufficient support force while avoiding excessive increase in material cost and manufacturing difficulty. In addition, it is also possible to explore the use of multi-stage distributed injection technology, that is, using multiple small holes instead of a single large hole to achieve a more uniform and gentle cleaning effect. Because there is material between each small hole, the overall strength is enhanced.

[0057] Preferably, an anti-backflow valve is provided at the connection between the main body 11 and the flushing end 12 to prevent the backflow of liquid flowing from the main body 11 to the flushing end 12 .

[0058] As disposable products, oral irrigators are replaced after each use. This is primarily for hygiene reasons. Since they come into direct contact with the patient's oral environment, the "one person, one use" principle must be strictly adhered to to avoid potential cross-infection risks. In contrast, although irrigators themselves are not disposable, they can be safely reused after thorough cleaning and disinfection.

[0059] However, during actual operation, cleaning fluid sometimes flows backward from the root canal into the oral irrigator, which not only affects the treatment effect but also may pose additional health risks. This phenomenon can be caused by a variety of factors, including but not limited to operator inexperience and equipment aging leading to a decrease in sealing. Once this occurs, subsequent treatment becomes more difficult.

[0060] To this end, a backflow prevention valve is installed at the connection between the irrigation head 12 and the main body 11. This valve effectively prevents reverse flow of liquid, allowing only flow from the oral irrigator toward the root canal and preventing any backflow in the opposite direction. This maximizes the integrity and safety of the entire system, even in the event of an unexpected situation.

[0061] Finally, it should be noted that those skilled in the art will appreciate that, in order to facilitate a better understanding of this patent, the embodiments of this patent set forth numerous technical details. However, even without these technical details and the various variations and modifications based on the aforementioned embodiments, the technical solutions claimed in the various claims of this patent can be substantially achieved. Therefore, in actual practice, various changes in form and detail may be made to the aforementioned embodiments without departing from the spirit and scope of this patent.

Claims

1. An oral irrigator for rinsing the inside of a root canal, characterized in that: The oral irrigating head comprises: A flushing needle (1) has a water flow channel inside so that water can flow in the water flow channel; The flushing needle (1) comprises: Body part(11); A flushing end portion (12) is connected to the main body portion (11), and the flushing end portion (12) is used to extend into the root canal to flush the inner wall of the root canal; A first water outlet hole (121) and a second water outlet hole (122) are provided on the side wall of the flushing end portion (12), and the first water outlet hole (121) and the second water outlet hole (122) are respectively located on opposite sides of the flushing end portion (12); The first water outlet hole (121) and the second water outlet hole (122) are both connected to the water flow channel, and the water in the water flow channel is discharged from the first water outlet hole (121) and the second water outlet hole (122) respectively.

2. The oral irrigating head according to claim 1, characterized in that: The diameter of the first water outlet hole (121) gradually increases from the inside to the outside; and / or, The diameter of the second water outlet hole (122) gradually decreases from the inside to the outside.

3. The oral irrigating head according to claim 2, characterized in that: The flushing end (12) is raised at the end of the water flow channel to form a water-dividing prism (123). The water-dividing prism (123) divides the water flow channel into two parts respectively connected to the first water outlet (121) and the second water outlet (122); The water-dividing prism (123) has two guiding surfaces (124) corresponding to the first water outlet hole (121) and the second water outlet hole (122), and the height of the guiding surfaces (124) gradually decreases from the middle of the water-dividing prism (123) toward the middle of the water-dividing prism (123).

4. The oral irrigating head according to claim 3, characterized in that: The guide surface (124) is an inwardly concave curved surface.

5. The oral irrigating head according to claim 1, characterized in that: The diameter of the water flow channel gradually increases from a side close to the flushing end (12) toward a side away from the flushing end (12).

6. The oral irrigating head according to claim 1, characterized in that: The width of the first water outlet hole (121) is 0.05 mm to 0.1 mm; The diameter of the flushing end portion (12) is 0.35 mm to 0.4 mm; The main body (11) is tapered, and the diameter of the main body (11) gradually increases from the line connection with the flushing end (12), and the taper of the main body (11) is 2%-6%; Scale marks (111) are evenly distributed on the outer surface of the main body (11) along its length direction to indicate the amount of liquid in the main body (11).

7. The oral irrigating head according to claim 1, characterized in that: The oral irrigating head further comprises: The adapter (2) has a water outlet (22) and a water inlet (21), wherein the water outlet (22) is connected to the flushing needle (1), and the water inlet (21) is connected to the flushing device; The water outlet (22) and the water inlet (21) are not on the same straight line.

8. The oral irrigating head according to claim 7, characterized in that: The angle between the water outlet (22) and the water inlet (21) is 45°-90°.

9. The oral irrigating head according to claim 1, characterized in that: The outer surface of the flushing end portion (12) is provided with reinforcing ribs (3) extending to the main body portion (11); The reinforcing rib (3) is strip-shaped, and the thickness of the cross section of the reinforcing rib (3) is 0.4-0.6 times the wall thickness of the flushing needle (1).

10. The oral irrigating head according to claim 1, characterized in that: A backflow prevention valve is provided at the connection between the main body (11) and the flushing end (12) to prevent backflow of liquid flowing from the main body (11) to the flushing end (12).

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