Nozzle for dental sand blasting handle

Abstract

The utility model relates to a nozzle for a dental sand blasting handle, and belongs to the field of dental instruments. Comprising a pressurizing nozzle, a nozzle body and a sand pipe, the nozzle body is of a tubular structure, one end of the sand pipe is fixedly arranged in the nozzle body, and the pressurizing nozzle is detachably arranged at the end in the nozzle body; the pressurizing nozzle comprises a nozzle pipe body, a limiting boss and a pressurizing mechanism, the limiting boss is fixedly arranged in the middle of the nozzle pipe body in a sleeving mode and abuts against a limiting step in the spray head body, and the pressurizing mechanism is fixedly arranged at one end of the nozzle pipe body in a sleeving mode and abuts against the inner wall of the spray head body; the other end of the nozzle pipe body is detachably connected with the spray head main body, and the sand pipe is communicated with the nozzle pipe body. Under the condition that the pressure intensity value of the water outlet is guaranteed, the input pressure of the input end is reduced, the use cost is reduced, and interference between the nozzle pipe body and a channel in the spray head is avoided.

Description

Technical Field

[0001] This utility model relates to the field of dental instruments, and in particular to a spray head for a dental sandblasting handle. Background Technology

[0002] A dental air polisher is a dental instrument used to whiten teeth, enhance their shine, remove stains, plaque, tea stains, tobacco stains, and food debris. It is often used with a handle. After connecting the handle and the air polishing device with a hose, the air polishing powder and water are sprayed from the nozzle of the handle. The air polishing powder and water mist mix and act on the teeth, using the rinsing action of the air polishing powder and water mist to clean the teeth.

[0003] In the existing technology, the nozzle and the spray head are designed as concentric circles. The nozzle is set inside the spray head and is connected to the sand tube inside the spray head, so that the sand powder is sprayed out from the nozzle. The area between the nozzle and the inner wall of the spray head is used to spray water mist, so that the sprayed water mist envelops the sand powder and mixes it evenly with the sand powder.

[0004] To ensure that the sprayed sand powder and water mist can reach the preset pressure, it is often necessary to pressurize the input end of the sand powder and water. However, due to the complex internal structure of the nozzle, the pressure of the water mist at the outlet is generally lower than the pressure value at the input end. At this time, it is necessary to further increase the pressure at the input end, which increases the cost of use. In addition, the nozzles and spray heads in the existing technology are mostly assembled by direct pressing, which has low installation accuracy and is prone to interference between the sand spraying port of the nozzle and the internal channel of the spray head. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a nozzle for a dental air blasting handle to solve the above-mentioned problem.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A dental air-blasting nozzle includes: a pressure-boosting nozzle, a nozzle body, and an abrasive tube. The nozzle body is a tubular structure. One end of the abrasive tube is fixedly disposed inside the nozzle body. The pressure-boosting nozzle is detachably disposed at the end of the nozzle body. The pressure-boosting nozzle includes: a nozzle tube body, a limiting boss, and a pressure-boosting mechanism. The limiting boss is fixedly sleeved in the middle of the nozzle tube body and abuts against a limiting step inside the nozzle body. The pressure-boosting mechanism is fixedly sleeved in one end of the nozzle tube body and abuts against the inner wall of the nozzle body. The other end of the nozzle tube body is detachably connected to the nozzle body. The abrasive tube communicates with the nozzle tube body.

[0007] The beneficial effects of this invention are as follows: Compared with the concentric cross-sectional shape of the nozzle and the spray head in the prior art, this invention, by fixing the pressurizing mechanism to one end of the nozzle tube and abutting against the inner wall of the spray head body, helps to reduce the cross-sectional area between the nozzle tube and the spray head body. Under the condition that the water input pressure remains unchanged, this invention helps to produce a higher water mist pressure. While ensuring the outlet pressure value, it helps to reduce the input pressure at the input end and reduce the cost of use. In addition, compared with the structure of the nozzle and the spray head being assembled by direct pressing in in the prior art, this invention, by fixing the limiting boss on the nozzle tube and abutting against the limiting step inside the spray head body, helps to limit the pressurizing nozzle inside the spray head and avoids interference between the nozzle tube and the channel inside the spray head.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the nozzle body is provided with a sand pipe channel, a water channel and a nozzle channel. The nozzle channel is connected to the side wall of the sand pipe channel. The two ends of the water channel are connected to the side walls of the sand pipe channel and the nozzle channel respectively. One end of the sand pipe is fixedly installed in the sand pipe channel, and the other end of the nozzle tube is inserted into the nozzle channel.

[0010] The beneficial effects of adopting the above-mentioned further solution are: the side walls of the nozzle channel and the sand tube channel are connected, which helps to form a channel similar to the figure "7" between the nozzle channel and the sand tube channel. At the same time, in conjunction with the water channel, the sand powder and water are sprayed out after bending, which facilitates the operation of air-polishing teeth by medical staff.

[0011] Furthermore, the limiting step is disposed in the circumferential direction of the nozzle channel, and the limiting step divides the nozzle channel into a first nozzle channel and a second nozzle channel. The inner diameter of the second nozzle channel is larger than the inner diameter of the first nozzle channel. The pressurizing mechanism is disposed in the second nozzle channel, and its sidewall abuts against the second nozzle channel. The other end of the nozzle tube is disposed in the first nozzle channel and is inserted into the first nozzle channel with an interference fit. One end of the water channel is connected to the second nozzle channel.

[0012] The beneficial effects of adopting the above-mentioned further solution are: the inner diameter of the second nozzle channel is larger than that of the first nozzle channel, which is conducive to providing displacement space for the limiting boss in the nozzle channel, and also conducive to providing flow space for the water input from the water channel. The other end of the nozzle tube body is inserted into the first nozzle channel with an interference fit, which is conducive to achieving the stability of the assembly between the booster nozzle and the nozzle body, and also ensures that the booster nozzle can be pulled out for replacement.

[0013] Furthermore, the pressurization mechanism includes multiple water-blocking strips, which are circumferentially spaced and fixedly installed on one end side wall of the nozzle tube. A water passage groove is formed between two adjacent water-blocking strips. The side of the water-blocking strip away from the nozzle tube abuts against the second nozzle channel. A water passage is formed between the water passage groove and the second nozzle channel to supply water flow.

[0014] The beneficial effects of adopting the above-mentioned further solution are as follows: the water baffle strip helps to reduce the cross-sectional area between the nozzle tube and the nozzle body. Under the condition that the water input pressure remains unchanged, it helps to increase the pressure of the sprayed water mist. While ensuring the pressure value at the outlet, it helps to reduce the input pressure at the input end and reduce the cost of use. In addition, the combination of the water channel and the water baffle strip helps to make the water flow uniformly around the nozzle tube and form a uniform water mist spray through mechanical limiting. This avoids the phenomenon that sand powder escapes from the water mist due to uneven water mist around the sand powder, which would lead to an increase in the dust concentration in the clinic.

[0015] Furthermore, the axis of the water passage is parallel to the axis of the nozzle tube.

[0016] The beneficial effect of adopting the above-mentioned further solution is that it helps to form a uniform water curtain around the sand powder when the water in multiple water tanks is sprayed out, avoiding the phenomenon that the sand powder escapes from the water mist due to uneven water mist around the sand powder, thereby increasing the dust concentration in the clinic.

[0017] Furthermore, the area between the outer wall of one end of the sand pipe inside the nozzle body and the sand pipe channel is a sealing layer, and the sealing layer contains sealant for fixing the sand pipe inside the sand pipe channel.

[0018] The beneficial effects of adopting the above-mentioned further solution are: setting sealant in the sealing layer helps to fix one end of the sand pipe in the sand pipe channel, avoiding the sand pipe from shaking to a large extent during operation, thereby avoiding affecting the uniformity of the water flow around the sand pipe. At the same time, it also helps to separate the water channel and sand powder channel in the nozzle body, preventing the sand powder and water from mixing in the nozzle body and causing blockage.

[0019] Furthermore, the sealing layer divides the sand pipe channel into a first sand pipe channel and a second sand pipe channel. The other end of the water channel is connected to the first sand pipe channel, and the nozzle channel is connected to the side wall of the second sand pipe channel.

[0020] The beneficial effect of adopting the above-mentioned further solution is that the sealing layer helps to separate the first sand pipe channel and the second sand pipe channel, preventing water flow and sand powder from mixing in the nozzle body and causing blockage.

[0021] Furthermore, it also includes a fixing sleeve, which is fixedly fitted onto the sand pipe. The sidewall of the fixing sleeve is alternately arranged with an arc side and a flat side in the circumferential direction. The arc side abuts against the sand pipe channel, and the flat side forms a channel for water to flow through with the sand pipe channel.

[0022] The beneficial effects of adopting the above-mentioned further solution are: the arc side abuts against the sand pipe channel, which helps to fix the fixed sleeve to the inner wall of the nozzle body, thereby further improving the stability of the sand pipe in the sand pipe channel, avoiding large shaking of the sand pipe in the sand pipe channel due to the large pressure inside the sand pipe, and avoiding affecting the uniformity of the water flow around the sand pipe.

[0023] Furthermore, it also includes a connector, which is a tubular structure detachably installed on the nozzle body at the end away from the pressurizing nozzle. The connector is connected to the nozzle body, and the sand pipe passes axially through the connector.

[0024] The beneficial effect of adopting the above-mentioned further solution is that the connector facilitates the connection of the booster nozzle and nozzle body to the external water supply equipment and sand powder supply equipment.

[0025] Furthermore, the side wall of the connector is provided with a water inlet and multiple sealing ring grooves. The water inlet is connected to the connector, and the sealing ring grooves are grooves provided on both sides of the water inlet.

[0026] The beneficial effects of adopting the above-mentioned further solution are: the connection between the water inlet and the connector facilitates the input of external water into the connector and into the nozzle body along the connector; the sealing gasket in the sealing ring groove helps to prevent external water from leaking at the water inlet. Attached Figure Description

[0027] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0028] Figure 2 for Figure 1 Enlarged view of region A in the middle;

[0029] Figure 3 An isometric view of the booster nozzle provided in an embodiment of this utility model;

[0030] Figure 4 An isometric view of the fixing sleeve provided in an embodiment of this utility model.

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 1. Pressure boosting nozzle; 2. Nozzle body; 3. Connector; 4. Fixing sleeve; 5. Sand pipe; 11. Nozzle tube body; 12. Limiting boss; 13. Pressure boosting mechanism; 21. Sand pipe channel; 22. Water channel; 23. Nozzle channel; 31. Water inlet; 32. Sealing ring groove; 41. Arc side; 42. Flat side; 131. Water baffle; 132. Water passage groove; 211. Sealing layer; 212. First sand pipe channel; 213. Second sand pipe channel; 231. Limiting step; 232. First nozzle channel; 233. Second nozzle channel. Detailed Implementation

[0033] The principles and features of this utility model are described below. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0034] like Figures 1 to 4 As shown, this embodiment provides a dental air-blasting nozzle for a handle, including: a pressure-boosting nozzle 1, a nozzle body 2, and an abrasive tube 5. The nozzle body 2 is a tubular structure, and one end of the abrasive tube 5 is fixedly disposed inside the nozzle body 2. The pressure-boosting nozzle 1 is detachably disposed at the end of the nozzle body 2. The pressure-boosting nozzle 1 includes: a nozzle tube 11, a limiting boss 12, and a pressure-boosting mechanism 13. The limiting boss 12 is fixedly sleeved in the middle of the nozzle tube 11 and abuts against the limiting step 231 inside the nozzle body 2. The pressure-boosting mechanism 13 is fixedly sleeved in one end of the nozzle tube 11 and abuts against the inner wall of the nozzle body 2. The other end of the nozzle tube 11 is detachably connected to the nozzle body 2. The abrasive tube 5 communicates with the nozzle tube 11.

[0035] The beneficial effects of this invention are as follows: Compared with the concentric cross-sectional shape of the nozzle and the spray head in the prior art, this invention, by fixing the pressurizing mechanism to one end of the nozzle tube and abutting against the inner wall of the spray head body, helps to reduce the cross-sectional area between the nozzle tube and the spray head body. Under the condition that the water input pressure remains unchanged, this invention helps to produce a higher water mist pressure. While ensuring the outlet pressure value, it helps to reduce the input pressure at the input end and reduce the cost of use. In addition, compared with the structure of the nozzle and the spray head being directly pressed into each other for assembly in the prior art, this invention, by fixing the limiting boss on the nozzle tube and abutting against the limiting step inside the spray head body, helps to limit the pressurizing nozzle inside the spray head and avoids interference between the nozzle tube and the channel inside the spray head.

[0036] Preferred, such as Figure 1 and Figure 2As shown, the nozzle body 2 is provided with a sand pipe channel 21, a water channel 22 and a nozzle channel 23. The nozzle channel 23 is connected to the side wall of the sand pipe channel 21. The two ends of the water channel 22 are connected to the side walls of the sand pipe channel 21 and the nozzle channel 23 respectively. One end of the sand pipe 5 is fixedly installed in the sand pipe channel 21, and the other end of the nozzle tube 11 is inserted into the nozzle channel 23.

[0037] It should be noted that in the preferred embodiment of this utility model, the nozzle body 2 is a "7"-shaped tubular structure, which facilitates the cleaning of the patient's teeth after the protruding part at the top is assembled with the pressurizing nozzle 1, making it convenient for medical personnel to operate.

[0038] The advantages of adopting the above-mentioned preferred solution are: the side walls of the nozzle channel and the sand tube channel are connected, which helps to form a channel similar to the figure "7" between the nozzle channel and the sand tube channel. At the same time, in conjunction with the water channel, the sand powder and water are sprayed out after bending, which facilitates the operation of air-polishing teeth by medical personnel.

[0039] Preferred, such as Figure 2 As shown, the limiting step 231 is disposed in the circumferential direction of the nozzle channel 23, and the limiting step 231 divides the nozzle channel 23 into a first nozzle channel 232 and a second nozzle channel 233. The inner diameter of the second nozzle channel 233 is larger than the inner diameter of the first nozzle channel 232. The pressurizing mechanism 13 is disposed in the second nozzle channel 233, and its sidewall abuts against the second nozzle channel 233. The other end of the nozzle tube 11 is disposed in the first nozzle channel 232 and is inserted into the first nozzle channel 232 with an interference fit. One end of the water channel 22 is connected to the second nozzle channel 233.

[0040] It should be noted that in the technical solution of this utility model, the other end of the nozzle tube 11 is inserted into the first nozzle channel 232 with an interference fit. This is necessary to ensure that the pressurizing nozzle 1 is stably assembled with the nozzle body 2, while also allowing the pressurizing nozzle 1 to be pulled out of the nozzle body 2 under a certain pulling force.

[0041] The advantages of adopting the above preferred solution are: the inner diameter of the second nozzle channel is larger than that of the first nozzle channel, which is beneficial to provide displacement space for the limiting boss in the nozzle channel, and also beneficial to provide flow space for the water input from the water channel. The other end of the nozzle tube body is inserted into the first nozzle channel with an interference fit, which is beneficial to achieve the stability of the assembly between the booster nozzle and the nozzle body, and also ensures that the booster nozzle can be pulled out for replacement.

[0042] Preferred, such as Figure 2 and Figure 3As shown, the pressurization mechanism 13 includes a plurality of water-blocking strips 131, which are circumferentially spaced and fixedly installed on one end side wall of the nozzle tube 11. A water passage groove 132 is formed between two adjacent water-blocking strips 131. The side of the water-blocking strip 131 away from the nozzle tube 11 abuts against the second nozzle channel 233. A water passage is formed between the water passage groove 132 and the second nozzle channel 233 to supply water flow.

[0043] It should be noted that in the preferred embodiment of this utility model, the cross-section of the water passage 132 is semi-circular, and the cross-section of the channel between the water passage 132 and the second nozzle channel 233 is circular.

[0044] The advantages of adopting the above-mentioned preferred solution are: the water baffle strip helps to reduce the cross-sectional area between the nozzle tube and the nozzle body, which helps to increase the pressure of the sprayed water mist while keeping the water input pressure constant. It also helps to reduce the input pressure at the input end while ensuring the pressure value at the outlet, thus reducing the cost of use. In addition, the combination of the water channel and the water baffle strip helps to make the water flow uniformly around the nozzle tube and form a uniform water mist through mechanical limiting, avoiding the phenomenon that sand powder escapes from the water mist due to uneven water mist around the sand powder, thereby increasing the dust concentration in the clinic.

[0045] Preferably, the axis of the water passage 132 is parallel to the axis of the nozzle tube 11.

[0046] It should be noted that: Figure 2 As shown, in the technical solution of this utility model, the port of the nozzle tube 11 that protrudes from one end of the nozzle body 2 is the sand outlet of the nozzle tube 11.

[0047] In a preferred embodiment of this utility model, the end of the water passage 132 near the limiting boss 12 is connected to the outer wall of the nozzle tube 11 by an arc transition, which reduces the impact force caused by the water flow hitting the end of the pressurizing mechanism 13.

[0048] The beneficial effect of adopting the above-mentioned preferred solution is that it helps to form a uniform water curtain around the sand powder when the water in the multiple water tanks is sprayed out, avoiding the phenomenon that the sand powder escapes from the water mist due to uneven water mist around the sand powder, thereby increasing the dust concentration in the clinic.

[0049] Preferred, such as Figure 2 As shown, the area between the outer wall of one end of the sand pipe 5 inside the nozzle body 2 and the sand pipe channel 21 is a sealing layer 211, and the sealing layer 211 is provided with sealant for fixing the sand pipe 5 inside the sand pipe channel 21.

[0050] It should be noted that, in the technical solution of this utility model, when the sand pipe 5 is sealed and fixedly connected between the outer wall of one end of the nozzle body 2 and the sand pipe channel 21, the end of the sand pipe 5 located inside the nozzle body 2 remains in communication with the sand pipe channel 21.

[0051] The advantages of adopting the above preferred solution are: the sealant inside the sealing layer helps to fix one end of the sand pipe in the sand pipe channel, preventing the sand pipe from shaking significantly during operation, thus avoiding affecting the uniformity of the water flow around the sand pipe. It also helps to separate the water path and sand powder channel inside the nozzle body, preventing the sand powder and water from mixing inside the nozzle body and causing blockage.

[0052] Preferred, such as Figure 2 As shown, the sealing layer 211 divides the sand pipe channel 21 into a first sand pipe channel 212 and a second sand pipe channel 213. The other end of the water channel 22 is connected to the first sand pipe channel 212, and the nozzle channel 23 is connected to the side wall of the second sand pipe channel 213.

[0053] It should be noted that in the technical solution of this utility model, the first nozzle channel 232 is connected to the side wall of the second sand pipe channel 213.

[0054] The advantages of adopting the above preferred solution are: the sealing layer helps to separate the first sand pipe channel and the second sand pipe channel, avoiding water flow and sand powder from mixing in the nozzle body and causing blockage.

[0055] Preferred, such as Figure 1 and Figure 4 As shown, it also includes a fixing sleeve 4, which is fixedly fitted onto the sand pipe 5. The sidewalls of the fixing sleeve 4 are alternately arranged with an arc side 41 and a flat side 42 in a circumferential manner. The arc side 41 abuts against the sand pipe channel 21, and the flat side 42 forms a channel for water to flow through with the sand pipe channel 21.

[0056] It should be noted that in a preferred embodiment of this utility model, the fixing sleeve 4 is disposed within the first sand pipe channel 212.

[0057] The advantages of adopting the above-mentioned preferred solution are: the arc side abuts against the sand pipe channel, which helps to fix the fixed sleeve to the inner wall of the nozzle body, thereby further improving the stability of the sand pipe in the sand pipe channel, avoiding large shaking of the sand pipe in the sand pipe channel due to the large pressure inside the sand pipe, and avoiding affecting the uniformity of the water flow around the sand pipe.

[0058] Preferred, such as Figure 1As shown, it also includes a connector 3, which is a tubular structure detachably installed on the nozzle body 2 at the end away from the pressurizing nozzle 1. The connector 3 is connected to the nozzle body 2, and the sand pipe 5 passes through the connector 3 axially.

[0059] It should be noted that in the preferred embodiment of this utility model, the connector 3 and the nozzle body 2 are connected by a thread or by an interference fit.

[0060] The connector 3 is connected to the first sand pipe channel 212.

[0061] The advantages of adopting the above preferred solution are: the connector facilitates the connection of the booster nozzle and nozzle body to the external water supply equipment and sand powder supply equipment.

[0062] Preferred, such as Figure 1 As shown, the side wall of the connector 3 is provided with a water inlet 31 and a plurality of sealing ring grooves 32. The water inlet 31 is connected to the connector 3, and the sealing ring grooves 32 are grooves provided on both sides of the water inlet 31.

[0063] It should be noted that, in a preferred embodiment of this utility model, the sealing ring groove 32 is disposed on both sides of the water inlet 31 along the axial direction of the connector 3.

[0064] The advantages of adopting the above preferred solution are: the connection between the water inlet and the connector facilitates the input of external water into the connector and into the nozzle body along the connector; the sealing gasket in the sealing ring groove helps to prevent external water from leaking at the water inlet.

[0065] The working process of this embodiment is described below:

[0066] like Figures 1 to 4 As shown, on the one hand, the external water supply equipment injects high-pressure water into the connector 3 through the inlet 31, and then enters the space between the first sand pipe channel 212 and the sand pipe 5 through the connector 3. Then, the water enters the space between the second nozzle channel 233 and the nozzle pipe 11 through the water passage 22 from the space between the first sand pipe channel 212 and the sand pipe 5. Finally, the water is sprayed out from the water tank 132 to form a water mist.

[0067] On the other hand, the external sand supply equipment inputs high-pressure sand into the sand pipe 5, and then into the second sand pipe channel 213 along the sand pipe 5, and then into the first nozzle channel 232, and finally sprays out from the port (sand outlet) protruding from the nozzle body 11 at one end of the nozzle body 2.

[0068] When both water mist and abrasive powder are sprayed out, the water mist evenly surrounds the abrasive powder in the circumference, preventing the abrasive powder from escaping from the water mist and thus increasing the dust concentration in the treatment room. At the same time, the water mist and abrasive powder come into contact with the patient's tooth surface at a preset pressure value to achieve cleaning of the teeth.

[0069] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0070] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0071] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0072] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0073] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0074] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A nozzle for a dental air blasting handle, characterized in that, include: The nozzle (1), the nozzle body (2), and the sand pipe (5) are provided. The nozzle body (2) is a tubular structure. One end of the sand pipe (5) is fixedly installed inside the nozzle body (2). The nozzle (1) is detachably installed at the end inside the nozzle body (2). The pressurizing nozzle (1) includes: a nozzle tube (11), a limiting boss (12), and a pressurizing mechanism (13). The limiting boss (12) is fixedly sleeved in the middle of the nozzle tube (11) and abuts against the limiting step (231) inside the nozzle body (2). The pressurizing mechanism (13) is fixedly sleeved at one end of the nozzle tube (11) and abuts against the inner wall of the nozzle body (2). The other end of the nozzle tube (11) is detachably connected to the nozzle body (2). The sand pipe (5) is connected to the nozzle tube (11).

2. The nozzle for a dental air-blasting handle according to claim 1, characterized in that, The nozzle body (2) is provided with a sand pipe channel (21), a water channel (22) and a nozzle channel (23). The nozzle channel (23) is connected to the side wall of the sand pipe channel (21). The two ends of the water channel (22) are connected to the side wall of the sand pipe channel (21) and the side wall of the nozzle channel (23) respectively. One end of the sand pipe (5) is fixedly installed in the sand pipe channel (21), and the other end of the nozzle tube (11) is inserted into the nozzle channel (23).

3. The nozzle for a dental air blasting handle according to claim 2, characterized in that, The limiting step (231) is disposed in the circumferential direction of the nozzle channel (23). The limiting step (231) divides the nozzle channel (23) into a first nozzle channel (232) and a second nozzle channel (233). The inner diameter of the second nozzle channel (233) is larger than the inner diameter of the first nozzle channel (232). The pressurizing mechanism (13) is disposed in the second nozzle channel (233), and its sidewall abuts against the second nozzle channel (233). The other end of the nozzle tube (11) is disposed in the first nozzle channel (232) and is inserted into the first nozzle channel (232) with an interference fit. One end of the water channel (22) is connected to the second nozzle channel (233).

4. The nozzle for a dental air polishing handle according to claim 3, characterized in that, The pressurization mechanism (13) includes multiple water baffles (131), which are circumferentially spaced and fixedly installed on one end side wall of the nozzle tube (11). A water passage groove (132) is formed between two adjacent water baffles (131). The side of the water baffle (131) away from the nozzle tube (11) abuts against the second nozzle channel (233). A water passage is formed between the water passage groove (132) and the second nozzle channel (233) for water to be sprayed out.

5. The nozzle for a dental air blasting handle according to claim 4, characterized in that, The axis of the water passage (132) is parallel to the axis of the nozzle tube (11).

6. The nozzle for a dental air-blasting handle according to claim 2, characterized in that, The area between the outer wall of one end of the sand pipe (5) inside the nozzle body (2) and the sand pipe channel (21) is a sealing layer (211), and the sealing layer (211) is provided with sealant for fixing the sand pipe (5) inside the sand pipe channel (21).

7. The nozzle for a dental air polishing handle according to claim 6, characterized in that, The sealing layer (211) divides the sand pipe channel (21) into a first sand pipe channel (212) and a second sand pipe channel (213). The other end of the water channel (22) is connected to the first sand pipe channel (212), and the nozzle channel (23) is connected to the side wall of the second sand pipe channel (213).

8. The nozzle for a dental air-blasting handle according to claim 2, characterized in that, It also includes a fixing sleeve (4), which is fixedly fitted on the sand pipe (5). The sidewall of the fixing sleeve (4) is alternately arranged with an arc side (41) and a flat side (42) in the circumference. The arc side (41) abuts against the sand pipe channel (21), and the flat side (42) forms a channel for water to flow through with the sand pipe channel (21).

9. The dental air-blasting nozzle for a handpiece according to any one of claims 1-8, characterized in that, It also includes a connector (3), which is a tubular structure detachably installed on the nozzle body (2) at the end away from the pressurizing nozzle (1). The connector (3) is connected to the nozzle body (2), and the sand pipe (5) passes through the connector (3) axially.

10. The nozzle for a dental air-blasting handle according to claim 9, characterized in that, The connector (3) has a water inlet (31) and a plurality of sealing ring grooves (32) on its side wall. The water inlet (31) is connected to the connector (3), and the sealing ring grooves (32) are grooves provided on both sides of the water inlet (31).

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