Dental handpiece oiling machine

Abstract

A dental handpiece oiling machine comprises a lubricating oil conveying pipeline, a gas conveying pipeline and an atomization generator, and the atomization generator is communicated with the lubricating oil conveying pipeline and the gas conveying pipeline. The atomization generator comprises a gas acceleration structure used for rapidly accelerating gas from the gas conveying pipeline to form high-speed airflow, and further comprises an atomization structure used for enabling lubricating oil from the lubricating oil conveying pipeline to be atomized under the action of the high-speed airflow to form oil mist. And outputting to the dental handpiece. According to the dental handpiece oiling machine disclosed by the invention, as lubricating oil is crushed into vaporific particles by high-speed airflow, oil and gas are fully mixed, and sufficient lubrication can be realized only by a small amount of oil, so that the pollution to the environment is greatly reduced; the oil supply system does not need an oil pump and is simple in structure and long in service life.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to an oil injector for a dental handpiece. Background Art

[0002] A dental handpiece is a medical device widely used in stomatology, and can be used for cleaning teeth and / or grinding decayed teeth. The maintenance of a dental handpiece is inseparable from an oil injector for a dental handpiece. Existing oil injectors for dental handpieces usually use an oil pump to pump lubricating oil into a pipeline, and then use compressed air to transport the lubricating oil into the dental handpiece to lubricate relevant parts inside the dental handpiece; or use a multi-way structure, and pump oil into the multi-way structure through an oil pump, and an air intake mechanism ventilates the multi-way structure. However, in this traditional oil injection method, since the oil and air cannot be fully mixed, the air entering the dental handpiece contains uneven oil, some with oil and some without oil, which is completely uncontrollable. If you want to fully lubricate the dental handpiece, it is usually necessary to extend the oil injection time to inject more lubricating oil, resulting in most of the lubricating oil being finally discharged into the air. Especially when lubricating multiple dental handpieces, this problem is even more obvious, wasting oil and polluting the environment. Summary of the Invention

[0003] In view of this, the present invention aims to provide an oil injector for a dental handpiece that can effectively mix oil and gas.

[0004] An oil injector for a dental handpiece includes a lubricating oil delivery pipeline, a gas delivery pipeline, and an atomization generator. The atomization generator is respectively communicated with the lubricating oil delivery pipeline and the gas delivery pipeline. The atomization generator includes a gas acceleration structure for rapidly accelerating the gas from the gas delivery pipeline to form an accelerated air flow. The atomization generator further includes an atomization structure such that the lubricating oil from the lubricating oil delivery pipeline is atomized under the action of the accelerated air flow to form an oil mist.

[0005] Preferably, a cavity is provided inside the atomization generator, and an oil nozzle is provided in the cavity. The cavity includes a throat formed between the outer wall of the oil nozzle and the inner wall of the cavity, a converging section located upstream of the throat, and a diverging section located downstream of the throat. The converging section is communicated with the gas delivery pipeline, and the oil nozzle is communicated with the lubricating oil delivery pipeline. The converging section and the throat form the gas acceleration structure, and the diverging section forms the atomization structure. The sequentially connected converging section, throat, and diverging section cause the gas to be rapidly accelerated when flowing from the converging section through the throat into the diverging section, and a negative pressure is generated in the end region of the oil nozzle to suck out the lubricating oil. The sucked-out lubricating oil is mixed with the accelerated air flow to form an oil mist, which is output to the dental handpiece.

[0006] In some embodiments, the atomization generator includes a housing and an atomization core. The cavity is disposed within the housing. The atomization core includes a body and an oil injection nozzle connected to one end of the body. The atomization generator further includes a gas input channel communicating with the gas delivery pipeline and a lubricating oil input channel communicating with the lubricating oil delivery pipeline. The gas input channel is disposed between the body and the housing and communicates with the converging section. The lubricating oil input channel penetrates through the body and the oil injection nozzle and then communicates with the diverging section.

[0007] In some embodiments, the transition from the outer surface of the body to the outer surface of the oil injection nozzle is in a converging shape, that is, the end face of the body close to the oil injection nozzle is conical.

[0008] In some embodiments, the part of the inner surface of the housing corresponding to the converging section is in a converging shape.

[0009] In some embodiments, the atomization core further includes a connection end connected to the other end of the body. The connection end is connected to a nozzle through a connecting pipe. The nozzle communicates with the lubricating oil delivery pipeline. The lubricating oil input channel penetrates through the connection end and communicates with the pipeline of the connecting pipe. The inner diameter of the pipeline of the connecting pipe is larger than the inner diameter of the lubricating oil input channel.

[0010] In some embodiments, the atomization generator further includes a valve body. The valve body is provided with a receiving cavity, a first opening and a second opening communicating with the receiving cavity. The receiving cavity communicates with the gas input channel. The gas delivery pipeline communicates with the receiving cavity through the first opening. The nozzle and the connecting pipe are installed in the receiving cavity. One end of the nozzle passes through the second opening and is connected to the lubricating oil delivery pipeline.

[0011] In some embodiments, the lubricating oil delivery pipeline is provided with a check valve to prevent the reverse flow of lubricating oil.

[0012] In some embodiments, the gas delivery pipeline is provided with an electromagnetic valve.

[0013] Preferably, the dental handpiece oil injector further includes a dispenser. The dispenser includes a plurality of output pipelines for respectively connecting with a plurality of the dental handpieces. The atomization generator further includes an atomization nozzle. The diverging section penetrates through the atomization nozzle. The dispenser is connected to the atomization nozzle so that the oil mist generated by the atomization generator is conveyed to the plurality of dental handpieces via the dispenser.

[0014] In some embodiments, the dental handpiece oil injector further includes a base and a cover detachably mounted on the base. The lubricating oil delivery pipeline, the gas delivery pipeline and the atomization generator are installed on the base and housed within the cover.

[0015] In some embodiments, a solenoid valve is provided in the gas delivery pipeline, and the dental handpiece oiler further includes a controller, which is electrically connected to the solenoid valve to control the opening and closing of the solenoid valve.

[0016] Compared with the prior art, in the dental handpiece oiler of the present invention, an atomization generator is provided inside the oiler. After starting the dental oiler, when the compressed air entering the atomization generator flows through the converging section, the throat and reaches the diverging section, it is rapidly accelerated, and a negative pressure is generated inside the atomization generator to draw out the lubricating oil. The lubricating oil is broken into mist-like particles by the high-speed airflow and is transported through the pipeline to the parts of the dental handpiece that need lubrication. Because the lubricating oil is broken into mist-like particles by the high-speed airflow, the oil and gas can be fully mixed, and only a small amount of oil needs to be input to achieve sufficient lubrication. For lubricating multiple dental handpieces simultaneously, uniform lubrication can also be achieved. The structure of the present invention is simple. A negative pressure is generated inside the atomization generator to draw out the lubricating oil, and the oil supply system can not use an oil pump. The oiler has a long service life, sufficient lubrication, less lubricating oil consumption, and greatly reduces environmental pollution at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the principle of the dental handpiece oiler according to an embodiment of the present invention.

[0018] Figure 2 It is a schematic structural diagram of the dental handpiece oiler according to an embodiment of the present invention.

[0019] Figure 3 is Figure 2 The schematic structural diagram of the dental handpiece oiler shown after removing the housing.

[0020] Figure 4 is Figure 3 The schematic cross-sectional view of the atomization generator and the solenoid valve of the dental handpiece oiler shown.

[0021] Figure 5 is Figure 4 The enlarged view of the atomization generator shown.

[0022] Figure 6 It is the schematic connection diagram of the controller and the solenoid valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. One or more embodiments of the present invention are exemplarily shown in the drawings to make the understanding of the technical solutions disclosed by the present invention more accurate and thorough. However, it should be understood that the present invention can be implemented in many different forms and is not limited to the embodiments described below.

[0024] Figure 1Schematic diagram of the principle of an oil injector for a dental handpiece according to an embodiment of the present invention.

[0025] Please refer to Figure 1 , an oil injector for a dental handpiece, including a lubricating oil delivery pipeline 10, a gas delivery pipeline 20, and an atomizing generator 30 respectively communicated with the lubricating oil delivery pipeline 10 and the gas delivery pipeline 20; the atomizing generator 30 includes a gas acceleration structure for sharply accelerating the gas from the gas delivery pipeline 20 to form an accelerating air flow, and the atomizing generator 30 further includes an atomizing structure such that the lubricating oil from the lubricating oil delivery pipeline 10 is atomized under the action of the accelerating air flow to form an oil mist.

[0026] Specifically, the atomizing generator 30 is provided with a cavity and an oil injection nozzle 342 entering the cavity. The cavity includes a throat 322 formed between the inner wall of the cavity and the outer wall of the oil injection nozzle 342, a converging section 324 located upstream of the throat, and a diverging section 326 located downstream of the throat 322. The converging section 326 is communicated with the gas delivery pipeline 20, and the oil injection nozzle 342 is communicated with the lubricating oil delivery pipeline 10. The converging section 326 and the throat 322 form a gas acceleration structure, and the diverging section 326 forms an atomizing structure; the converging section 324, the throat 322, and the diverging section 326 connected in sequence along the air flow direction have a large front-end space, a small middle space, and a large rear-end space, forming a de Laval nozzle structure, such that when the gas flows from the converging section 324 through the throat 322 into the diverging section 326, it is sharply accelerated, and a negative pressure is generated in the region near the end of the oil injection nozzle 342 (the region of the diverging section 326 close to the end of the oil injection nozzle 342) to suck the lubricating oil out of the oil injection nozzle 342. The lubricating oil entering the diverging section 326 is blown by the accelerated air flow into fine particles and is fully mixed with the accelerated air flow to form an oil mist, and is output to the dental handpiece 40 through the diverging section 326.

[0027] The cross-sectional area of the converging section 324 gradually decreases in the direction close to the throat 322. In this embodiment, the inner wall surface of the converging section 324 is a conical surface.

[0028] The cross-sectional area of the diverging section 326 is larger than the cross-sectional area of the throat 322. In this embodiment, the inner wall surface of the diverging section 326 is a cylindrical surface, the inner diameter of which is uniformly arranged along the length direction, or the inner wall surface is trumpet-shaped, the inner diameter of which gradually increases in the direction away from the throat. The oil injection nozzle 342 is a circular tube, and the cross-section of the throat 322 is annular. Preferably, the cross-sectional area of the diverging section 326 is more than 2 times the cross-sectional area of the throat 322, such as 2.5 times, 3 times, 3.5 times, 4 times, 4.5 times, 5 times, 5.5 times, 6 times, 6.5 times, 7 times, 7.5 times, 8 times, 8.5 times, 9 times, 10 times, etc.

[0029] Preferably, the dental handpiece oiler further includes a dispenser 50, which includes a plurality of output pipelines 52 for respectively connecting with a plurality of dental handpieces 42. The dispenser 50 is connected to the atomization generator 30 so that the atomized oil generated by the atomization generator 30 is delivered to the plurality of dental handpieces 40 via the dispenser 50. Preferably, the dental handpiece 40 is connected to the output pipeline 52 of the dispenser 50 through a quick connector 42 to facilitate the disassembly and assembly of the dental handpiece 40.

[0030] Please refer to Figure 2 and Figure 3 , the dental handpiece oiler further includes a housing 100, and the lubricating oil delivery pipeline 10, the gas delivery pipeline 20, the atomization generator 30, the dental handpiece 40 and the dispenser 50 are all installed in the housing 100. Specifically, the housing 100 includes a base 110 and a cover 120, and the cover 120 is detachably installed on the base 110. A receiving space is formed between the cover 120 and the base 110, and the lubricating oil delivery pipeline 10, the gas delivery pipeline 20, the atomization generator 30, the dental handpiece 40 and the dispenser 50 are all received in the receiving space. When the dental handpiece 40 needs maintenance, the cover 120 can be opened, and the dental handpiece 40 can be respectively connected to the dispenser 50 for maintenance.

[0031] Please refer to Figure 4 and Figure 5 , the atomization generator 30 includes a housing 32 and an atomization core 34 received in the housing 32. A cavity is provided in the housing 32, and the atomization core 34 includes a body 344, an injection nozzle 342 located at one end of the body 344, and a connection end 346 located at the other end of the body 344. The cavity includes a throat 322 formed between the inner wall of the cavity and the outer wall of the injection nozzle 342, a converging section 324 located upstream of the throat, and a diverging section 326 located downstream of the throat 322. The upstream and downstream in this article are determined according to the flow direction of the fluid. The converging section 324 includes a converging end (narrower inner diameter end) close to the throat 322 and an open end (wider inner diameter end) away from the throat 322. The body 344 is received in the open end of the converging section 324, and the injection nozzle 342 passes through the converging end of the converging section 324 and then inserts into the diverging section 326, so that a throat 322 is formed between the outer surface of the injection nozzle 342 and the inner surface of the housing 32, and the throat 322 is located at the connection between the converging end of the converging section 324 and the diverging section 326. The cross-sectional area of the converging section 324 gradually decreases in the direction close to the throat 322, and the cross-sectional area of the diverging section 326 is larger than the cross-sectional area of the throat 322. In this way, from the converging section 324 to the diverging section 326, the cross-sectional area of the flow channel decreases sharply at the throat 322 and then increases sharply after passing through the throat 322 (i.e., the downstream of the throat 322), forming a de Laval nozzle structure.

[0032] Preferably, the outer diameter of the body 344 is larger than the outer diameters of the fuel injector 342 and the connection end 346. The outer surface of the body 344 and the outer surface of the fuel injector 342 are preferably connected by an inclined surface, and the inclined surface is opposite to the inclined surface of the converging section 324. A gas input channel 36 is provided between the body 344 and the housing 32, and the gas input channel 36 communicates with the converging section 324. In this embodiment, the gas input channel 36 is provided on the body 344. A lubricating oil input channel 38 is provided at the center of the atomization core 34, and the lubricating oil input channel 38 sequentially penetrates through the connection end 346, the body 344, and the fuel injector 342. The connection end 346 of the atomization core 34 is connected to the nozzle 349 through a connecting pipe 348, and the inner diameter of the connecting pipe 348 is larger than the inner diameter of the lubricating oil input channel 38.

[0033] The atomization generator further includes a valve body 39, and the valve body 39 is hermetically connected to the housing 32. A receiving cavity 392, a first opening 394, and a second opening 396 communicating with the receiving cavity 392 are provided in the valve body 39. The gas delivery pipeline 20 communicates with the first opening 394, and the gas input channel 36 communicates the receiving cavity 392 with the converging section 324; the nozzle 349 and the connecting pipe 348 are installed in the receiving cavity 392, and one end of the nozzle 349 passes through the second opening 396 and communicates with the lubricating oil delivery pipeline 10. Preferably, the inner diameter of the connecting pipe 348 is larger than the inner diameter of the nozzle 349 so that the connecting pipe 348 is sleeved around the nozzle 349.

[0034] The atomization generator 30 further includes an atomization nozzle 35, and the atomization nozzle 35 is formed at one end of the housing 32 away from the valve body 39. The diverging section 326 penetrates through the atomization nozzle 35, and the distributor 50 is connected to the atomization nozzle 35 through a connecting pipeline so that the oil mist generated by the atomization generator 30 is delivered to a plurality of the dental handpieces 40 through the distributor.

[0035] The dental handpiece oil injector further includes an electromagnetic valve 22 connected between the gas delivery pipeline 20 and the atomization generator 30, and the opening time of the electromagnetic valve 22 can be adjusted as needed. Preferably, please refer to Figure 6 ., a controller 80 can also be provided. The controller 80 is electrically connected to the electromagnetic valve 22, and the opening time of the electromagnetic valve 12 is controlled by the controller 80. For example, for a dental handpiece with a complex structure, a mode can be selected, and the controller 80 controls the opening time of the electromagnetic valve 12 to be relatively long, such as 2 to 3 seconds, etc.; for a dental handpiece with a simple structure, another mode can be selected, and the controller 80 controls the opening time of the electromagnetic valve 22 to be relatively short, such as 1 to 2 seconds, etc.

[0036] The lubricating oil delivery pipeline 10 is provided with a one-way valve 12 to prevent the lubricating oil from flowing back.

[0037] The oil and gas control principle of the dental handpiece oil injector will be described in detail below:

[0038] When compressed air enters the atomization generator 30 through the solenoid valve 22, a negative pressure is generated inside the atomization generator 30. Under atmospheric pressure, the lubricating oil flows into the atomization generator 30 through the one-way valve 12, mixes with the compressed air to form an oil mist. The oil mist reaches the quick connector 42 through the distributor 50 and then flows to the dental handpiece 40 to lubricate the handpiece components.

[0039] Specifically, when compressed air enters the accommodation chamber 392 of the atomization generator 30 through the solenoid valve 22 and then enters the converging section 324 through the gas input channel 36. Since the front space of the small annular space at the throat 322 is large, the middle space is small, and the rear space is large, when the compressed air reaches the front end of the annular space, that is, the converging section 324, the flow rate is small and the pressure increases. When flowing through the throat 322, the air flow velocity increases. When flowing through the diverging section 326, the gas expands rapidly and the air flow velocity further increases, and a negative pressure is generated near the fuel injection nozzle 342. The lubricating oil enters the atomization generator 30 under atmospheric pressure and flows out from the fuel injection nozzle 34. The lubricating oil flowing out from the fuel injection nozzle 34 is quickly dispersed by the high-speed air flow to form fine particles and mixes with the high-speed air flow to form an oil mist.

[0040] In the dental handpiece oil injector of the present invention, an atomization generator is provided inside the oil injector. After starting the dental oil injector, the compressed air entering the atomization generator is rapidly accelerated when flowing through the converging section, the throat and the diverging section, and at the same time, a negative pressure is generated inside the atomization generator to bring out the lubricating oil. The lubricating oil is broken into mist-like fine particles by the high-speed air flow and is transported through the pipeline to the parts of the dental handpiece that need to be lubricated. Because the lubricating oil is broken into mist-like fine particles by the high-speed air flow, the oil and gas can be fully mixed, and only a small amount of oil needs to be input to achieve sufficient lubrication. It can also achieve uniform lubrication when lubricating multiple dental handpieces at the same time. The structure of the present invention is simple, a negative pressure is generated inside the atomization generator to bring out the lubricating oil, the oil supply system does not need to use an oil pump, the service life of the oil injector is long, the lubrication is sufficient, the amount of lubricating oil used is small, and at the same time, the environmental pollution is greatly reduced.

[0041] It should be noted that the present invention is not limited to the above embodiments. According to the creative spirit of the present invention, those skilled in the art can also make other changes, and these changes made according to the creative spirit of the present invention should be included within the scope of protection required by the present invention.

Claims

1. A dental handpiece oil injector, comprising a lubricating oil delivery pipeline and a gas delivery pipeline, characterized in that, The dental handpiece oil injector further includes an atomization generator, which is respectively communicated with the lubricating oil delivery pipeline and the gas delivery pipeline. The atomization generator includes a gas acceleration structure for rapidly accelerating the gas from the gas delivery pipeline to form an accelerated air flow, and the atomization generator further includes an atomization structure so that the lubricating oil from the lubricating oil delivery pipeline is atomized under the action of the accelerated air flow to form an oil mist.

2. The dental handpiece oil injector according to claim 1, wherein The atomization generator is internally provided with a cavity and an injection nozzle arranged in the cavity. The cavity includes a throat formed between the outer wall of the injection nozzle and the inner wall of the cavity, a converging section located upstream of the throat, and a diverging section located downstream of the throat; The converging section is communicated with the gas delivery pipeline, and the injection nozzle is communicated with the lubricating oil delivery pipeline; The converging section and the throat form the gas acceleration structure, and the diverging section forms the atomization structure; The sequentially connected converging section, throat and diverging section cause the gas to be rapidly accelerated when flowing from the converging section through the throat into the diverging section, and a negative pressure is generated in the end area of the injection nozzle to suck out the lubricating oil. The sucked-out lubricating oil is mixed with the accelerated air flow to form an oil mist, which is then output to the dental handpiece.

3. The dental handpiece oil injector according to claim 2, characterized in that, The atomization generator includes a housing and an atomization core. The cavity is arranged in the housing. The atomization core includes a body and the injection nozzle connected to one end of the body. The atomization generator further includes a gas input channel communicated with the gas delivery pipeline and a lubricating oil input channel communicated with the lubricating oil delivery pipeline. The lubricating oil input channel penetrates through the body and the injection nozzle and is communicated with the diverging section. The gas input channel is arranged around the lubricating oil input channel and is communicated with the converging section.

4. The dental handpiece oil injector according to claim 3, wherein It is in a converging transition from the outer surface of the body to the outer surface of the injection nozzle; and The inner surface of the housing corresponding to the converging section is in a converging shape.

5. The dental handpiece oil injector according to claim 3, characterized in that, The atomization core further includes a connection end connected to the other end of the body. The connection end is connected to a nozzle through a connecting pipe. The nozzle is communicated with the lubricating oil delivery pipeline. The lubricating oil input channel penetrates through the connection end and is communicated with the pipeline of the connecting pipe. The inner diameter of the pipeline of the connecting pipe is larger than the inner diameter of the lubricating oil input channel.

6. The dental handpiece oil injector according to claim 5, wherein, The atomization generator further includes a valve body. The valve body is internally provided with a receiving cavity and a first opening and a second opening communicated with the receiving cavity. The receiving cavity is communicated with the gas input channel. The gas delivery pipeline is communicated with the receiving cavity through the first opening. The nozzle and the connecting pipe are installed in the receiving cavity. One end of the nozzle passes through the second opening and is connected to the lubricating oil delivery pipeline.

7. The dental handpiece oil injector according to claim 6, wherein, A one-way valve is arranged on the lubricating oil delivery pipeline to prevent the reverse flow of the lubricating oil.

8. The dental handpiece oil injector according to any one of claims 1 to 7, characterized in that, The dental handpiece oil injector further includes a dispenser. The dispenser includes a plurality of output pipelines for respectively connecting with a plurality of the dental handpieces. The atomization generator further includes an atomization nozzle. The expansion section penetrates through the atomization nozzle. The dispenser is connected with the atomization nozzle so that the oil mist generated by the atomization generator is conveyed to the plurality of dental handpieces via the dispenser.

9. The dental handpiece oil injector according to any one of claims 1 to 7, characterized in that, The dental handpiece oil injector further includes a base and a cover detachably mounted on the base. The lubricating oil delivery pipeline, the gas delivery pipeline and the atomization generator are mounted on the base and housed in the cover.

10. The dental handpiece oil injector according to any one of claims 1 to 7, characterized in that, The gas delivery pipeline is provided with an electromagnetic valve. The dental handpiece oil injector further includes a controller. The controller is electrically connected with the electromagnetic valve to control the opening and closing of the electromagnetic valve.

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