Illuminable Dental Sandblasting Handpiece

Abstract

This application belongs to the technical field of sandblasting scaling equipment, and specifically relates to an illuminated dental sandblasting handpiece. The illuminated dental sandblasting handpiece includes a nozzle head assembly, an intermediate assembly, and an end assembly connected in sequence. A light-emitting device is installed in the nozzle head assembly, the intermediate assembly, and / or the end assembly. A light propagation path is provided in the nozzle head assembly, the intermediate assembly, and / or the end assembly. Wiring for connecting the light-emitting device is installed in the nozzle head assembly, the intermediate assembly, and / or the end assembly. Light from the light-emitting device is emitted directly or via the light propagation path, thereby providing the dental sandblasting handpiece with an illumination function. According to this application, the light source can be used to directly illuminate the scaling area during oral treatment and cleaning, ensuring a better field of view and making it easier to check the cleaning results.

Description

[Technical Field]

[0001] FIELD OF THE INVENTION This application is in the field of sandblasting scaling equipment, and specifically relates to an illuminable dental sandblasting handpiece. [Background technology]

[0002] Sandblasting scaling uses compressed air to move and spray blasting powder (usually composed of sodium bicarbonate, glycine, or erythritol) onto the tooth surface, which then combines with a simultaneously sprayed liquid medium (usually water) to impact plaque and tartar on the tooth surface with a certain amount of kinetic energy, thereby cleaning the tooth surface, effectively preventing periodontal disease, and maintaining dental health. Conventional sandblasting handpieces lack a lighting function, which makes it difficult to provide sufficient light when scaling molars, making treatment and cleaning difficult. In conventional techniques, practitioners typically rely on the light source in the dental chair unit, which requires frequent adjustment of the light source angle, which is inconvenient. Summary of the Invention [Problem to be solved by the invention]

[0003] In view of the above problems, the present application aims to provide an illuminated dental sandblasting handpiece that has a light source that can directly irradiate the scaling area when treating and cleaning the oral cavity, thereby ensuring a better field of view and contributing to confirmation of the cleaning effect. [Means for solving the problem]

[0004] To achieve the above objectives, the present application adopts the following technical solutions:

[0005] The dental sandblasting handpiece capable of illumination comprises a nozzle head assembly, an intermediate assembly and an end assembly connected in sequence, wherein a light-emitting element is installed in the nozzle head assembly, the intermediate assembly and / or the end assembly, a light propagation path is provided in the nozzle head assembly, the intermediate assembly and / or the end assembly, wiring (i.e., a power cable) for connecting to the light-emitting element is installed in the nozzle head assembly, the intermediate assembly and / or the end assembly, and the light beam from the light-emitting element is emitted directly or via the light propagation path, thereby providing the dental sandblasting handpiece with an illumination function.

[0006] In the present application, furthermore, the nozzle head assembly has a lower portion inserted into an intermediate assembly and removably connected to the intermediate assembly, and the nozzle head assembly and intermediate assembly are connected by a first positioning assembly, and the terminal assembly has an upper portion inserted into the intermediate assembly and annularly mounted on the lower end of the nozzle head assembly, and the terminal assembly is removably connected to the intermediate assembly and the nozzle head assembly, and the terminal assembly and intermediate assembly are connected by a second positioning assembly.

[0007] In the present application, the nozzle head assembly further includes a pipe core member, a nozzle head, a nozzle head gas pipe, a nozzle head optical fiber, a nozzle head connecting member, and a joint pipe, the pipe core member is installed within the upper end of the nozzle head and has an injection port, the nozzle head connecting member is connected to the lower end of the nozzle head and is connected to an intermediate assembly, one end of the joint pipe is ring-mounted on the outside of the lower end of the nozzle head connecting member, the nozzle head gas pipe and the nozzle head optical fiber are both installed within the nozzle head, and the nozzle head gas pipe extends through the nozzle head connecting member into the joint pipe.

[0008] In the present application, the intermediate assembly further includes a handpiece housing, a handpiece connecting member fixedly installed within the handpiece housing, an intermediate optical fiber, a support member, a water pipe, a branch pipe, and a lock ring, the handpiece connecting member is hollow, the nozzle head connecting member is inserted into the hollow portion of the handpiece connecting member, and the intermediate optical fiber and the nozzle head optical fiber are connected, the support member is supported and fixed between the handpiece connecting member and the branch pipe, the upper end of the water pipe is in communication with the hollow portion of the handpiece connecting member, the branch pipe is in communication with the lower end of the water pipe and is fitted around the outside of the upper part of the distal assembly, and the lock ring is in contact with the end face of the branch pipe and is connected to the inner wall of the lower end of the handpiece housing.

[0009] In the present application, furthermore, the flow dividing pipe or the lock ring is provided with an annular groove and an engaging groove, the annular groove communicates with the water pipe, and the engaging groove is detachably connected to the terminal assembly.

[0010] In the present application, furthermore, the first positioning assembly includes a protrusion and a groove that fits with the protrusion, the protrusion being provided on a side surface of the nozzle head connecting member, and the groove being provided on the handpiece connecting member.

[0011] The present application further relates to a distal assembly including a distal housing, a diverting valve, a locking ring, a fixing sleeve, a coupling sleeve, a gas inlet tube, a water pipe coupling, a distal optical fiber, a light emitting element, an adapter, a magnetic element, and a circuit board, wherein the diverting valve is fixedly installed in the distal housing and inserted into the locking ring to extend to the diversion tube and communicate with the diversion tube, the locking ring is fixedly annularly mounted on the outside of the diverting valve and engaged with the engaging groove, the fixing sleeve is fixedly installed on the diverting valve and inserted into the hollow portion of the handpiece housing, the coupling sleeve is fixedly installed in the fixing sleeve and annularly mounted on the outside of the coupling tube, and the gas inlet tube is installed in the terminal housing and extends into the coupling sleeve through the inside of the diverting valve, the water pipe coupling extends through the terminal housing into the diverting valve and communicates with the diverting valve, the terminal optical fiber is fixed in the diverting valve and connected to the intermediate optical fiber, the light-emitting element is fixed in the terminal housing by a light-emitting element fixing member, the adapter is located in the terminal housing and fixedly connected to the lower end of the diverting valve, the magnetic element and circuit board are fixedly attached to the adapter, a first electrode and a second electrode are installed on the circuit board, and the first electrode and second electrode are each electrically connected to the light-emitting element.

[0012] In the present application, furthermore, the second positioning assembly includes a positioning pin and a positioning hole that fits with the positioning pin, the positioning pin being provided on the flow guide valve, and the positioning hole being provided in an engaging groove in the intermediate assembly, thereby ensuring accurate connection between the terminal optical fiber and the intermediate optical fiber by the positioning pin and the positioning hole.

[0013] The present application further provides that the flow guide valve is further provided with a first through hole and a second through hole, and a gap is provided between the outer wall of the gas inlet pipe and the inner wall of the flow guide valve, the first through hole is provided on the side of the flow guide valve facing the gas inlet pipe, thereby allowing water in the flow guide valve to flow into the gap between the flow guide valve and the gas inlet pipe via the first through hole, and the second through hole is provided at the connection point between the flow guide valve and the annular groove, thereby allowing water in the gap between the flow guide valve and the gas inlet pipe to flow into the annular groove via the second through hole. [Effects of the Invention]

[0014] The present application provides a removably connectable nozzle head assembly, intermediate assembly, and terminal assembly, with a light emitting device installed in the terminal assembly, and a nozzle head optical fiber, intermediate optical fiber, and terminal optical fiber, each having the functions of guiding and collecting light, installed in the nozzle head assembly, intermediate assembly, and terminal assembly, respectively. The nozzle head assembly and intermediate assembly are connected by a first positioning assembly, and the terminal assembly and intermediate assembly are connected by a second positioning assembly, so that the nozzle head optical fiber, intermediate optical fiber, and terminal optical fiber are connected in sequence to form an optical propagation path, and the connected end faces are aligned perpendicularly, enabling the most efficient propagation of light. As a result, the present application provides a light source that can directly illuminate the scaling area during oral treatment and cleaning, ensuring a better field of view and making it easier to check the cleaning effect, facilitating operation especially in surgical procedures for molar areas, and also allowing doctors to illuminate during tooth cleaning procedures and use the light source to inspect the oral cavity. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a schematic diagram of an illuminable dental sandblasting handpiece according to the present application. FIG. [Figure 2]1 is a cross-sectional view of a nozzle head assembly of an illuminatable dental sandblasting handpiece according to the present application. [Figure 3] FIG. 3 is a partial enlarged view of a portion A in FIG. 2. [Figure 4] FIG. 2 is a second cross-sectional view of a nozzle head assembly in an illuminatable dental sandblasting handpiece according to the present application. [Figure 5] 1 is a cross-sectional view of an intermediate assembly of an illuminatable dental sandblasting handpiece according to the present application. [Figure 6] FIG. 2 is a second cross-sectional view of an intermediate assembly in an illuminatable dental sandblasting handpiece according to the present application. [Figure 7] 1 is a plan view of an intermediate assembly of an illuminatable dental sandblasting handpiece according to the present application. FIG. [Figure 8] 1 is a cross-sectional view of a distal end assembly of an illuminatable dental sandblasting handpiece according to the present application. [Figure 9] 2 is a cross-sectional view of the distal end assembly of the illuminable dental sandblasting handpiece according to the present application. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0016] As shown in Figure 1, the illuminable dental sandblasting handpiece includes a nozzle head assembly 1, an intermediate assembly 2, and an end assembly 3. The nozzle head assembly 1 has a lower portion inserted into the intermediate assembly 2 and detachably connected thereto, and the nozzle head assembly 1 and the intermediate assembly 2 are connected by a first positioning assembly. The end assembly 3 has an upper portion inserted into the intermediate assembly 2 and ring-mounted on the lower end of the nozzle head assembly 1, and the end assembly 3 is detachably connected to the intermediate assembly 2 and the nozzle head assembly 1, and the end assembly 3 and the intermediate assembly 2 are connected by a second positioning assembly. A light-emitting element 308 is further installed in the end assembly 3. Optical propagation paths are provided in the nozzle head assembly 1, intermediate assembly 2, and terminal assembly 3, and the dental sandblasting handpiece has an illumination function when light from the light-emitting element 308 propagates through the optical propagation paths. Electrical and control signals are provided to the light-emitting element 308 through a handpiece pigtail (which contains a water pipe, a gas pipe, and a power signal line and connects the handpiece to a host) externally connected to the terminal assembly 3.

[0017] In this embodiment, the light emitting element 308 is an LED light, and the nozzle head optical fiber 14, intermediate optical fiber 22, and terminal optical fiber 307 are respectively installed in the nozzle head assembly 1, intermediate assembly 2, and terminal assembly 3. The nozzle head optical fiber 14, intermediate optical fiber 22, and terminal optical fiber 307 are all transparent light-guiding elements with light guiding and light-collecting functions. The end faces of the terminal optical fiber 307, handpiece optical fiber 22, and nozzle head optical fiber 14 face each other to form an optical propagation path, which allows light to propagate most efficiently.

[0018] 2 to 4, the nozzle head assembly 1 includes a tubular core member 11, a nozzle head 12, a nozzle head gas pipe 13, a nozzle head optical fiber 14, a nozzle head connecting member 15, and a joint pipe 16. The tubular core member 11 is installed within the upper end of the nozzle head 12 and has an injection port formed therein. The nozzle head connecting member 15 is connected to the lower end of the nozzle head 12 and is connected to the intermediate assembly 2. The nozzle head connecting member 15 has a water inlet hole 151 formed therein. Annular sealing members 17 are further installed above and below the water inlet hole 151 in the nozzle head connecting member 15, and the annular sealing members 17 are used to seal a gap between the nozzle head connecting member 15 and the handpiece connecting member 21 of the intermediate assembly 2. One end of the joint pipe 16 is looped around the lower end of the nozzle head connecting member 15, the nozzle head gas pipe 13 and the nozzle head optical fiber 14 are both installed in the nozzle head 12, the nozzle head gas pipe 13 extends through the nozzle head connecting member 15 into the joint pipe 16, and a gap for water flow is provided between the outer wall of the nozzle head gas pipe 13 and the inner wall of the nozzle head connecting member 15. More specifically, the tubular core member 11 is provided with a first injection port 111 located in the center of the tubular core member 11 and a second injection port 112 located on the outer side of the tubular core member 11, the first injection port 111 communicating with a first passage 121 in the nozzle head 12 in which the nozzle head gas pipe 13 is installed, the second injection port 112 communicating with a second passage 122 in the nozzle head 12, and the second passage 122 communicating with the gap between the nozzle head gas pipe 13 and the nozzle head connecting member 15. With this installation, a mixed gas consisting of high-pressure gas and blast powder is sprayed from the first nozzle 111 via the nozzle head gas pipe 13, and water is sprayed from the second passage 122 via the gap between the nozzle head gas pipe 13 and the nozzle head connecting member 15.The pipe core member 11 is realized as a structure that allows gas to pass inside and water to pass outside, and the gas and water are mixed and atomized outside the nozzle head.This allows the water sprayed from the outside to envelop the blast powder and prevent it from scattering.

[0019] In this embodiment, as shown in Figures 5 to 7, the intermediate assembly 2 includes a handpiece housing 23, a handpiece connecting member 21 fixedly installed in the handpiece housing 23, an intermediate optical fiber 22, a support member 24, a water pipe 25, a branch pipe 26, and a lock ring 27, and the handpiece housing 23 is provided with a protruding base 231 for fixing and positioning the handpiece connecting member 21. The handpiece connecting member 21 is hollow and has a water outlet hole 211. The nozzle head connecting member 15 is inserted into the hollow portion of the handpiece connecting member 21, and the intermediate optical fiber 22 and the nozzle head optical fiber 14 are connected thereto. The support member 24 is supported and fixed between the handpiece connecting member 21 and the branch pipe 26. The upper end of the water pipe 25 communicates with the hollow portion of the handpiece connecting member 21. The branch pipe 26 communicates with the lower end of the water pipe 25 and is fitted around the upper part of the terminal assembly 3 (when the terminal assembly 3 is divided into upper and lower parts). The lock ring 27 contacts the end face of the bottom end of the branch pipe 26 and is connected to the inner wall of the lower end of the handpiece housing 23, i.e., connected to the branch pipe 26 and the inner hole of the lock ring 27. The lock ring 27 functions to ensure that the branch pipe 26 is fixed in the axial direction. More specifically, the dividing pipe 26 is provided with an annular groove 261 and an engagement groove 263, the annular groove 261 communicates with the water pipe 25, and the engagement groove 263 is detachably connected to the terminal assembly 3. Of course, in other embodiments, the annular groove 261 and the engagement groove 263 may be provided on the lock ring 27.

[0020] In this embodiment, specifically, the first positioning assembly includes a protrusion 152 and a groove 212 that fits with the protrusion 152. The protrusion 152 is provided on the side of the nozzle head connecting member 15, and the groove 212 is provided on the handpiece connecting member 21. When the protrusion 152 is inserted and rotated to a predetermined position, it forms a specific angle with the intermediate assembly 2, aligning the end face of the handpiece optical fiber 22 with the end face of the nozzle head optical fiber 14.

[0021] 8 and 9, the terminal assembly 3 includes a terminal housing 316, a diverting valve 304, a locking ring 306, a fixing sleeve 301, a coupling sleeve 302, a gas inlet tube 303, a water pipe coupling 312, a terminal optical fiber 307, a light emitting element 308, an adapter 310, a magnetic element 311, and a circuit board 313. The diverting valve 304 is fixedly installed in the terminal housing 316 and inserted into the locking ring 27, extending to the diversion pipe 26 and communicating with the diversion pipe 26. The locking ring 306 is fixedly mounted on the outside of the diverting valve 304 and engaged with the engaging groove 263, thereby detachably connecting the intermediate assembly 2 to the terminal assembly 3. The fixed sleeve 301 is fixedly installed in the diverting valve 304 and inserted into the hollow portion of the handpiece housing 23, the joint sleeve 302 is fixedly installed in the fixed sleeve 301 and is fitted around the joint tube 16, the gas inlet tube 303 is installed in the terminal housing 316 and extends through the inside of the diverting valve 304 to the joint sleeve 302 and is connected to an inlet tube (external conduit) for introducing a mixed fluid of high-pressure gas and blasting powder. The water pipe joint 312 extends through the terminal housing 316 into the diverting valve 304 and communicates with the diverting valve 304, and the terminal optical fiber 307 is fixed in the diverting valve 304 and connected to the intermediate optical fiber 22. Specifically, the diverting valve 304 has a receiving hole that matches the shape of the terminal optical fiber 307, and the terminal optical fiber 307 is fixed to the diverting valve 304 by adhesive or the like. The light emitting element 308 is fixed in the terminal housing 316 by a light emitting element fixing member 309 fixed in the terminal housing 316, the adapter 310 is located in the terminal housing 316 and fixedly connected to the lower end of the flow guide valve 304, the magnetic element 311 and circuit board 313 are fixedly attached to the adapter 310, a first electrode 314 and a second electrode 315 are installed on the circuit board 313, and the first electrode 314 and the second electrode 315 are electrically connected to the light emitting element 308, respectively.In this embodiment, the magnetic element 311 is a magnet, and a sensor for detecting magnetism is built into the host connected to the handpiece, and the sensor is configured to determine whether the handpiece is lifted.

[0022] More specifically, the flow guiding valve 304 is further provided with a first through-hole 3041 and a second through-hole 3042, providing a gap between the outer wall of the gas inlet pipe 303 and the inner wall of the flow guiding valve 304. The first through-hole 3041 is provided on the side of the flow guiding valve 304 facing the gas inlet pipe 303, allowing water in the flow guiding valve 304 to flow into the gap between the flow guiding valve 304 and the gas inlet pipe 303 via the first through-hole 3041. The second through-hole 3042 is provided at the connection point between the flow guiding valve 304 and the annular groove 261, allowing water in the gap between the flow guiding valve 304 and the gas inlet pipe 303 to flow into the annular groove 261 via the second through-hole 3042.

[0023] In this embodiment, specifically, the second positioning assembly includes a positioning pin 305 and a positioning hole 262 that fits with the positioning pin 305. The positioning pin 305 is provided on the diverting valve 304, and the positioning hole 262 is provided in the engagement groove 263 in the intermediate assembly 2, so that the positioning pin 305 and the positioning hole 262 ensure accurate connection between the terminal optical fiber 307 and the intermediate optical fiber 22.

[0024] In other embodiments, the light-emitting element may be installed in the nozzle head assembly 1 or the intermediate assembly 2. When the light-emitting element is installed in the nozzle head assembly 1, no optical fiber light propagation path is required, and the light beam from the light-emitting element is emitted directly and used for treating and cleaning the oral cavity. When the light-emitting element is installed in the intermediate assembly 2, it is necessary to provide an optical fiber light propagation path only in the nozzle head assembly 1 and the intermediate assembly 2.

[0025] The working principle of this application is as follows: The mixture of high-pressure gas and blasting powder introduced from the external pipeline enters the nozzle head gas pipe 13 via the gas inlet pipe 303, and finally flows out from the first nozzle 111 of the pipe core member 11 and is mixed with water in front of the first nozzle 111. Water enters the guiding valve 304 through the water pipe joint 312, flows through the first through-hole 3041 between the guiding valve 304 and the gas inlet pipe 303, then flows through the second through-hole 3042 into the intermediate assembly annular groove 261 and into the water pipe 25, then flows out of the water pipe 25 and into the handpiece connecting member 21, flows out of the water outlet hole 211 of the handpiece connecting member 21 and enters the gap between the nozzle head gas pipe 13 and the nozzle head connecting member 15 via the water inlet hole 151 of the nozzle head connecting member 15 (the annular sealing member 17 ensures that the water enters the gap from the water outlet hole 211 via the water inlet hole 151), and then flows out of the second nozzle hole 112 of the core member 11 to mix with the mixture from the nozzle head gas pipe 13, the mixing position being 3 to 5 mm away from the front end of the first nozzle hole 111. The light beam from the light-emitting element 308 in the terminal assembly 3 is transmitted from the terminal optical fiber 307 via the intermediate optical fiber 22 of the intermediate assembly 2 to the nozzle head optical fiber 14 in the nozzle head assembly 1 and emitted from the nozzle head optical fiber 14, thereby providing the dental sandblasting handpiece with an illumination function. [Industrial Applicability]

[0026] The present application provides a nozzle head assembly 1, an intermediate assembly 2, and a terminal assembly 3 that are detachably connected, a light emitting device 308 is installed in the terminal assembly 3, a nozzle head optical fiber 14, an intermediate optical fiber 22, and a terminal optical fiber 307 having light guiding and light collecting functions are installed in the nozzle head assembly 1, the intermediate assembly 2, and the terminal assembly 3, respectively, and the nozzle head assembly 1 and the intermediate assembly 2 are connected by a first positioning assembly, and the terminal assembly 3 and the intermediate assembly 2 are connected by a second positioning assembly. By connecting using the positioning assembly, the nozzle head optical fiber 14, the intermediate optical fiber 22 and the terminal optical fiber 307 are connected in order to form an optical propagation path, and the connected end faces are directly facing each other, realizing the most efficient propagation of light. As a result, according to the present application, a light source can be provided that can directly irradiate the scaling area when treating and cleaning the oral cavity, ensuring a better field of view and making it easier to check the cleaning effect, which makes operation easier, especially during surgery in the molar area. In addition, the doctor can illuminate the area during tooth cleaning procedures and use the light source to inspect the oral cavity. [Explanation of symbols]

[0027] 1 Nozzle head assembly 11 Pipe core member 111 1st injection port 112 2nd injection port 12 nozzle head 121 1st aisle 122 2nd aisle 13 Nozzle head gas pipe 14 Nozzle head optical fiber 15 Nozzle head connecting member 151 Water entry hole 152 Protrusion 16 Joint pipe 17 Annular sealing member 2 Intermediate assembly 21 Handpiece connecting member 211 Water outlet 212 Groove 22 Handpiece Optical Fiber 23 Handpiece housing 24 Support member 25 Water pipe 26 Diversion tube 261 Circular Groove 262 Positioning hole 263 Engagement groove 27 Lock ring 3. Terminal Assembly 301 Fixed sleeve 302 Joint sleeve 303 Gas Entry Pipe 304 Diversion valve 3041 First through hole 3042 Second through hole 305 Locating Pin 306 Locking ring 307 End optical fiber 308 Light-emitting element 309 Light-emitting element fixing member 310 adapter 311 Magnetic Elements 312 Water pipe joint 313 Circuit Board 314 1st electrode 315 2nd electrode 316 Terminal housing

Claims

1. The dental sandblasting handpiece includes a nozzle head assembly, an intermediate assembly, and an end assembly connected in this order, a light emitting element is installed in the nozzle head assembly, the intermediate assembly, and / or the end assembly, a light propagation path is provided in the nozzle head assembly, the intermediate assembly, and / or the end assembly, wiring for connecting with the light emitting element is installed in the nozzle head assembly, the intermediate assembly, and / or the end assembly, and light rays from the light emitting element are emitted directly or via the light propagation path, thereby providing the dental sandblasting handpiece with an illumination function. An illuminated dental sandblasting handpiece characterized by:

2. The nozzle head assembly has a lower portion inserted into an intermediate assembly and removably connected to the intermediate assembly, and the nozzle head assembly and intermediate assembly are connected by a first positioning assembly. The terminal assembly has an upper portion inserted into the intermediate assembly and is annularly mounted on the lower end of the nozzle head assembly, and the terminal assembly is removably connected to the intermediate assembly and the nozzle head assembly, and the terminal assembly and intermediate assembly are connected by a second positioning assembly.

10. The illuminable dental sandblasting handpiece of claim 1.

3. The nozzle head assembly includes a pipe core member, a nozzle head, a nozzle head gas pipe, a nozzle head optical fiber, a nozzle head connecting member, and a joint pipe, the pipe core member is installed in the upper end of the nozzle head and has an injection port, the nozzle head connecting member is connected to the lower end of the nozzle head and is connected to an intermediate assembly, one end of the joint pipe is ring-mounted on the outside of the lower end of the nozzle head connecting member, the nozzle head gas pipe and the nozzle head optical fiber are both installed in the nozzle head, and the nozzle head gas pipe extends through the nozzle head connecting member into the joint pipe.

3. The illuminable dental sandblasting handpiece of claim 2.

4. The intermediate assembly includes a handpiece housing, a handpiece connecting member fixedly installed within the handpiece housing, an intermediate optical fiber, a support member, a water pipe, a branch pipe, and a lock ring. The handpiece connecting member is hollow, and the nozzle head connecting member is inserted into the hollow portion of the handpiece connecting member to connect the intermediate optical fiber and the nozzle head optical fiber. The support member is supported and fixed between the handpiece connecting member and the branch pipe. The upper end of the water pipe communicates with the hollow portion of the handpiece connecting member. The branch pipe communicates with the lower end of the water pipe and is fitted around the outside of the upper part of the terminal assembly. The lock ring contacts the end face of the branch pipe and is connected to the inner wall of the lower end of the handpiece housing.

4. The illuminable dental sandblasting handpiece of claim 3.

5. The flow dividing pipe or the lock ring is provided with an annular groove and an engagement groove, the annular groove communicates with the water pipe, and the engagement groove is removably connected to the terminal assembly.

5. The illuminable dental sandblasting handpiece of claim 4.

6. The first positioning assembly includes a protrusion and a recessed groove that fits with the protrusion, the protrusion being provided on a side surface of the nozzle head connecting member, and the recessed groove being provided on the handpiece connecting member.

6. The illuminable dental sandblasting handpiece of claim 5.

7. The distal assembly includes a distal housing, a diverter valve, a locking ring, a fixing sleeve, a joint sleeve, a gas inlet tube, a water pipe joint, a distal optical fiber, a light emitting element, an adapter, a magnetic element, and a circuit board, the diverter valve is fixedly installed in the distal housing and inserted into the locking ring to extend to the diversion tube and communicate with the diversion tube, the locking ring is fixedly annularly mounted on the outside of the diverter valve and engaged with the engaging groove, the fixing sleeve is fixedly installed on the diverter valve and inserted into the hollow portion of the handpiece housing, the joint sleeve is fixedly installed in the fixing sleeve and annularly mounted on the outside of the joint tube, the gas inlet tube is fixed to the distal housing, The water pipe joint is installed in the housing and extends into the joint sleeve through the inside of the diverter valve, the water pipe joint extends into the diverter valve through the terminal housing and communicates with the diverter valve, the terminal optical fiber is fixed in the diverter valve and connected to the intermediate optical fiber, the light emitting element is fixed in the terminal housing by a light emitting element fixing member, the adapter is located in the terminal housing and fixedly connected to the lower end of the diverter valve, the magnetic element and the circuit board are fixedly attached to the adapter, a first electrode and a second electrode are installed on the circuit board, and the first electrode and the second electrode are electrically connected to the light emitting element, respectively.

6. The illuminable dental sandblasting handpiece of claim 5.

8. The second positioning assembly includes a positioning pin and a positioning hole that fits with the positioning pin, the positioning pin is provided on the flow guide valve, and the positioning hole is provided in an engagement groove in the intermediate assembly, thereby ensuring accurate connection between the terminal optical fiber and the intermediate optical fiber by the positioning pin and the positioning hole.

8. The illuminable dental sandblasting handpiece of claim 7.

9. The flow diverter valve is provided with a first through-hole and a second through-hole, and a gap is provided between the outer wall of the gas inlet pipe and the inner wall of the flow diverter valve. The first through-hole is provided on the side of the flow diverter valve facing the gas inlet pipe, so that water in the flow diverter valve can flow into the gap between the flow diverter valve and the gas inlet pipe via the first through-hole. The second through-hole is provided at the connection point between the flow diverter valve and the annular groove, so that water in the gap between the flow diverter valve and the gas inlet pipe can flow into the annular groove via the second through-hole.

8. The illuminable dental sandblasting handpiece of claim 7.

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