Dental sandblasting device

Abstract

This utility model discloses a dental air-blasting device, including a handle, a nozzle, and an air tube. The handle has independent water channels and air-abrasive channels. The nozzle has a mounting hole. The air tube is stepped, with its larger end inserted into the mounting hole and connected to the nozzle, and the other end extending out of the nozzle. The air tube is inserted into and communicates with the air-abrasive channel, forming a liquid outlet between the air tube and the inner wall of the mounting hole. The water channel communicates with the liquid outlet. This utility model features a stepped air tube, with its larger end inserted into the front of the air-abrasive channel. This design prevents high-speed abrasive powder from directly impacting the nozzle, and the larger thickness of the larger end of the air tube provides impact resistance. The smaller thickness of the smaller end facilitates the formation of a ring-shaped liquid outlet between the air tube and the mounting hole, achieving water and abrasive powder separation and reducing the likelihood of abrasive clogging. Furthermore, the design of one end of the air tube protruding from the nozzle ensures that the water and abrasive are mixed outside the nozzle, away from the mounting hole, further reducing the likelihood of abrasive clogging.

Description

Technical Field

[0001] This utility model relates to the field of dental technology, specifically to a dental sandblasting device. Background Technology

[0002] Dental air polishing is an air polishing technique that uses compressed gas (usually air) to propel abrasive powder onto the tooth surface, where it mixes with a liquid medium (usually water) to clean the tooth surface. For example, it can remove plaque, soft deposits, tobacco stains, and tea stains, effectively preventing periodontal disease and maintaining dental health.

[0003] Existing patent CN110882071A discloses a nozzle assembly for a pneumatic dental air-blasting device, including a housing, a gas pipe, a water pipe, and a nozzle, with the gas pipe and water pipe respectively fixed to the nozzle; one end of the housing is connected to the nozzle, and the other end is a connector; the housing has a water inlet for the water pipe. While this nozzle assembly can clean teeth, the high-speed abrasive powder directly impacts the nozzle in the gas pipe, making the nozzle prone to damage under the influence of the high-speed abrasive powder, resulting in a short lifespan for the nozzle assembly.

[0004] Therefore, a dental sandblasting device was designed with a stepped air tube added to the nozzle. This not only prevents high-speed sand powder from directly impacting the nozzle, but also increases the thickness of the front end of the air-sand channel, making it more impact-resistant. Utility Model Content

[0005] The purpose of this invention is to provide a dental air blasting device that incorporates a stepped air tube at the nozzle. This not only prevents high-speed abrasive powder from directly impacting the nozzle but also increases the thickness of the air-abrasive channel tip, enhancing its impact resistance. To this end, this invention adopts the following technical solution:

[0006] A dental air blasting device includes a handle, a nozzle, and an air tube. The handle has independent water channels and air-sand channels. The nozzle has a mounting hole. One end of the air tube is inserted into the mounting hole and detachably connected to the nozzle, while the other end extends out of the nozzle. The air tube communicates with the air-sand channels, and a liquid outlet is formed between the air tube and the inner wall of the mounting hole. The water channel communicates with the liquid outlet.

[0007] As a further improvement to the above technical solution:

[0008] The trachea consists of a first tube, a second tube, a third tube, and a fourth tube connected in sequence and integrally formed. The outer diameter of the trachea increases from the first tube to the fourth tube. The fourth tube is inserted into the air-sand channel and is connected to the air-sand channel.

[0009] Furthermore, the mounting hole is composed of a large hole and a small hole connected together, with the large hole located away from the air-sand channel.

[0010] Furthermore, the first, second, third, and fourth tubes are coaxial and have the same inner diameter. The fourth tube is inserted into the small hole, and the outer wall of the fourth tube is completely fitted and sealed to the inner wall of the small hole.

[0011] Furthermore, the connection between the water channel and the mounting hole is located on the side of the third pipe.

[0012] The air tube has a notch that connects to the air-sand channel.

[0013] Furthermore, the notch is formed by opening the end of the trachea inward, and the diameter of the notch is consistent with the diameter of the front end of the gas-sand channel.

[0014] The handle and nozzle are integrally formed, and the handle and nozzle are combined to form a "7" shaped structure.

[0015] Furthermore, the included angle between the handle and the nozzle is 90°-110°.

[0016] The trachea is made of hard alloy or diamond material.

[0017] Compared with the prior art, the present invention achieves at least the following beneficial effects:

[0018] 1. This utility model features a stepped air pipe. The larger end of the stepped air pipe is inserted into the front end of the air-sand channel. This not only prevents high-speed sand powder from directly impacting the nozzle, but also makes the larger end of the air pipe thicker and more impact-resistant. The smaller end of the air pipe is thinner, which facilitates the formation of a ring-shaped liquid outlet between the air pipe and the mounting hole, achieving separation of water and sand powder and reducing the likelihood of sand blockage.

[0019] 2. In this utility model, one end of the air pipe protrudes from the nozzle, so that the water and sand mix outside the nozzle and away from the nozzle mounting hole, making the nozzle less prone to sand clogging. Attached Figure Description

[0020] One or more embodiments of the present invention will now be described by way of example only with reference to the accompanying drawings, in which:

[0021] Figure 1 This is a structural cross-sectional view of Embodiment 1 of the present utility model;

[0022] Figure 2 This is a diagram of the trachea structure according to Embodiment 1 of this utility model.

[0023] The diagram is labeled as follows: 1. Handle; 2. Nozzle; 3. Air pipe; 11. Water channel; 12. Air-sand channel; 21. Liquid outlet; 31. Notch; 32. First pipe; 33. Second pipe; 34. Third pipe; 35. Fourth pipe. Detailed Implementation

[0024] The present invention will now be described in detail with reference to exemplary embodiments shown in the accompanying drawings. However, it should be understood that the present invention may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided herein to make the disclosure of the present invention more complete and to fully convey the concept of the present invention to those skilled in the art.

[0025] In the description of this utility model, it should be understood that the terms "center", "lateral", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0026] To address the drawback of easily damaged nozzles in existing technologies, the inventors, after careful analysis, discovered that the cause is that in existing nozzle assemblies, high-speed abrasive powder directly impacts the nozzle within the gas pipe, making the nozzle prone to breakage under the impact of the high-speed abrasive powder and resulting in a short lifespan for the nozzle assembly. Based on this analysis, the inventors added an air pipe to the nozzle, which is detachably installed inside the nozzle. This not only prevents high-speed abrasive powder from directly impacting the nozzle but also allows for the replacement of the air pipe, thus improving the service life of the device. Therefore, the inventors provide the following structural improvement: Example

[0027] like Figure 1 and Figure 2 As shown, a dental air-blasting device according to this embodiment includes a handle 1, a nozzle 2, and an air tube 3. The handle 1 has independent water channels 11 and air-sand channels 12. The nozzle 2 has a mounting hole. The air tube 3 is stepped, with its larger end inserted into the mounting hole and connected to the nozzle 2, and the other end extending out of the nozzle 2. The air tube 3 is inserted into and communicates with the air-sand channel 12. A liquid outlet 21 is formed between the air tube 3 and the inner wall of the mounting hole. The water channel 11 communicates with the liquid outlet 21. One end of the air tube 3 protrudes from the nozzle 2, allowing the water and sand to mix outside the nozzle 2, away from the mounting hole of the nozzle 2, thus preventing the nozzle 2 from becoming clogged with sand.

[0028] The air tube 3 is integrally formed by connecting the first tube 32, the second tube 33, the third tube 34, and the fourth tube 35 in sequence. The outer diameter of the air tube 3 increases progressively from the first tube 32 to the fourth tube 35. The fourth tube 35 is inserted into and communicates with the air-sand channel 12. The air tube 3 is stepped, making the wall thickness of the fourth tube 35 greater than that of the other three tubes. The connection between the air-sand channel 12 and the air tube 3 is located on the fourth tube 35, allowing high-speed sand powder to directly impact the inner wall of the fourth tube 35. The thick wall of the fourth tube 35 allows it to withstand the impact of high-speed sand powder in the airway for a longer period, reducing the frequency of air tube 3 replacements. This invention features a liquid outlet 21 that sprays water and an air tube 3 that sprays sand, using a concentric tube-like structure. Water sprays from the liquid outlet 21, forming an outer ring of water that surrounds the sprayed sand powder, preventing sand powder from splashing. The liquid outlet 21 gradually increases in size, which not only increases the amount of water sprayed out, allowing more sand powder to dissolve, but also increases the thickness of the water in the outer ring, making it less likely for sand powder to splash. The air pipe 3 has a notch 31, which communicates with the air-sand channel 12. The notch 31 is formed by opening from the end face of the air pipe 3 inward, and the diameter of the notch 31 is the same as the diameter of the front end of the air-sand channel 12.

[0029] The mounting hole consists of a large hole and a small hole connected together, with the large hole located away from the air-sand channel 12. The first pipe 32, the second pipe 33, the third pipe 34, and the fourth pipe 35 are coaxial and have the same inner diameter. The fourth pipe 35 is inserted into the small hole, with its outer wall completely fitting and sealing against the inner wall of the small hole. Because the outer wall of the fourth pipe 35 is completely fitted and sealed against the inner wall of the small hole, water at the liquid outlet 21 is less likely to seep into the connection between the air-sand channel 12 and the air pipe 3, thus reducing the likelihood of sand blockage at the connection.

[0030] The connection between the water channel 11 and the mounting hole is located on the side of the third pipe 34. When high-pressure water is sprayed from the water channel 11 to the liquid outlet 21, it impacts the outer wall of the air pipe 3, which can easily cause damage. Therefore, the connection between the water channel 11 and the mounting hole is located on the side of the third pipe 34. Since the wall thickness of the third pipe 34 is greater than that of the first pipe 32 or the second pipe 33, the third pipe 34 can withstand the impact for a longer period of time compared to the impact of high-pressure water on the first pipe 32 or the second pipe 33, reducing the frequency of air pipe 3 replacement.

[0031] The handle 1 and nozzle 2 are integrally molded, forming a "7" shape. The angle between the handle 1 and nozzle 2 is 90°-110°. The "7" shape facilitates cleaning teeth and prevents the operator's hand from obstructing the teeth.

[0032] When the dental air polishing device is in use, pressurized air and water are input. Air-polished abrasive powder is ejected from the air pipe 3 through the air-polish channel 12, and water is ejected from the liquid outlet 21 through the water channel 11. The high-pressure air in the air pipe 3 carries the abrasive powder out, and the abrasive powder is surrounded by water. The high-speed abrasive powder knocks off dental plaque, tartar, etc. The water in the outer ring dissolves some of the abrasive powder. In addition, the water surrounding the high-pressure air-powder mixture prevents abrasive powder from splashing. Example

[0033] The difference between this embodiment and Embodiment 1 is that the air tube 3 is made of hard alloy, while the handle 1 and nozzle 2 are injection-molded plastic parts. Hard alloy is an alloy material made by powder metallurgy of a hard compound of refractory metal and a binder metal. It has high hardness and strong wear resistance, and its properties remain essentially unchanged even at 500°C. Therefore, high-speed sand powder impacting the air tube 3 through the air-sand channel 12 is unlikely to cause wear on the air tube 3. Even if the high-speed sand powder impacts the air tube 3 and raises its temperature, it is not easily worn. The handle 1 and nozzle 2 are made of plastic, reducing manufacturing costs. The air tube 3 is made of a different material than the handle 1 and nozzle 2, which greatly reduces manufacturing costs while ensuring the service life of the device. At the same time, it also reduces the weight of the device, making it more convenient for the user to grip. Example

[0034] The difference between this embodiment and Embodiment 1 is that the air tube 3 is made of diamond, while the handle 1 and nozzle 2 are injection-molded plastic parts. Diamond is the hardest naturally occurring substance found on Earth. Therefore, high-speed abrasive powder impacting the air tube 3 through the air-abrasive channel 12 is less likely to cause wear on the air tube 3. However, diamond is expensive. By using different materials for the air tube 3, handle 1, and nozzle 2, the manufacturing cost is greatly reduced while ensuring the lifespan of the nozzle.

[0035] It should be understood that all the above embodiments are exemplary and not restrictive. Various modifications or variations made by those skilled in the art to the specific embodiments described above under the concept of this utility model should be within the protection scope of this utility model.

Claims

1. A dental sandblasting device, characterized by: Includes a handle (1), a nozzle (2) and an air pipe (3). The handle (1) has an independent water channel (11) and an air sand channel (12). The nozzle (2) has an installation hole. The air pipe (3) is stepped and its large end is inserted into the installation hole and connected to the nozzle (2), while the other end extends out of the nozzle (2). The air pipe (3) is inserted into the air sand channel (12) and connected to the air sand channel (12). A liquid outlet (21) is formed between the air pipe (3) and the inner wall of the installation hole. The water channel (11) is connected to the liquid outlet (21).

2. The dental sandblasting device of claim 1, wherein: The air tube (3) is formed by connecting the first tube (32), the second tube (33), the third tube (34) and the fourth tube (35) in sequence and forming a single piece. The outer diameter of the air tube (3) extends from the first tube (32) to the fourth tube (35) in an increasing trend. The fourth tube (35) is inserted into the air-sand channel (12) and communicates with the air-sand channel (12).

3. The dental sandblasting device of claim 2, wherein: The mounting hole is composed of a large hole and a small hole connected together, with the large hole located away from the air-sand channel (12).

4. The dental sandblasting device of claim 3, wherein: The first tube (32), the second tube (33), the third tube (34) and the fourth tube (35) are coaxial and have the same inner diameter. The fourth tube (35) is inserted into the small hole, and the outer wall of the fourth tube (35) is completely fitted and sealed with the inner wall of the small hole.

5. The dental sandblasting device of claim 4, wherein: The connection between the water channel (11) and the mounting hole is located on the side of the third pipe (34).

6. The dental sandblasting device according to claim 1 or 5, characterized in that: The air pipe (3) has a notch (31) that is connected to the air-sand channel (12).

7. The dental sandblasting device of claim 6, wherein: The notch (31) is formed by opening the end of the air pipe (3) inward, and the diameter of the notch (31) is the same as the diameter of the front end of the air-sand channel (12).

8. The dental sandblasting device of claim 1, wherein: The handle (1) and the nozzle (2) are integrally formed, and the handle (1) and the nozzle (2) are combined to form a "7" shaped structure.

9. The dental sandblasting device of claim 8, wherein: The included angle between the handle (1) and the nozzle (2) is 90°-110°.

10. The dental sandblasting device of claim 1, wherein: The trachea (3) is made of hard alloy or diamond material.

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