Novel anti-back-suction device for high-speed turbine handpiece

Abstract

The invention discloses a novel anti-back-suction device for a high-speed turbine handpiece. The novel anti-back-suction device comprises a machine head, wherein, the inner cavity of the machine head is equipped with a rotating wind wheel component; the side part of the machine head is equipped with an air inlet and an air return vent; the air inlet and the air return vent are respectively connected with an air inlet pipe and an air return pipe; the air return pipe is internally equipped with a control valve for plugging or opening the air return vent, and an air control pipe is arranged between the control valve and the air inlet pipe; and the air inlet pipe is internally equipped with an air inlet check valve, and the air inlet check valve is positioned between the air inlet and the air control pipe. The novel anti-back-suction device has the advantages of reasonable design, simple structure, high safety and high service efficiency. In the invention, when the handpiece stops operation, the air inlet pipe and the air return pipe prevent airflow at the same time so that cyclone in the machine head stops immediately so as to prevent the inertial response of the wind wheel component and timely cause the wind wheel component to stop rotating, thus avoiding a centrifugal fan-type air suction phenomenon and a back suction effect and achieving an ideal effect of preventing back suction.

Description

technical field [0001] The invention relates to an oral medical device, in particular to a new type anti-sucking device of a high-speed turbine handpiece designed to eliminate the back-suction effect of the high-speed turbine handpiece and the hazards such as cross-infection and disease transmission caused by it. Background technique [0002] The normal operation of the high-speed turbine handpiece is to use the whirlwind formed by the airflow in the handpiece to blow the wind wheel assembly, so that the wind wheel assembly rotates at a high speed, driving the tool to rotate at a high speed of 300,000 to 450,000 revolutions per minute, cutting or drilling teeth. [0003] When the input airflow stops, although there is no airflow in the intake pipe, due to the inertial wind wheel assembly is still in high-speed rotation, the gas and part of the liquid molecules in it are thrown into the intake pipe and return air pipe due to centrifugal force, forming a centrifugal fan. Effec...

AI Technical Summary

Problems solved by technology

[0005] Since the high-speed turbine handpieces produced by the previous manufacturers and most of the current manufacturers have no anti-backflow measures, more than 98% of the high-speed turbine handpieces currently in use have no back-suction devices, and about 95% of the newly launched high-speed turbine handpieces have no back-suction devices. Suction device, only about 5% of the high-speed turbine handpieces with non-return suction device only install a one-way valve in the intake pipe, and only this one-way valve has an unsatisfactory anti-retraction effect

There are two main reasons: one is that there is no damping at the air return port, the inertial rotation effect of the wind wheel assembly is still obvious, the centrifugal effect of the fan still exists, and the back-suction effect naturally exists, but the back-suction amount is only reduced at the air inlet, but in There will still be a certain amount of pollutants in the wind wheel assembly and the machine head

The second is that the failure of the one-way valve at the air inlet is more common, and the suck-back effect is greater after the one-way valve fails

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