Dental handpiece core added with stoppers

Abstract

The invention relates to a dental handpiece core added with stoppers. The handpiece core is arranged in a handpiece head which is connected with a handpiece hand shank, and comprises a rotating shaft, a wind wheel and two bearings, wherein the wind wheel rotatably sleeves the rotating shaft; the two bearings are respectively located at the upper part and the lower part of the wind wheel; a rear cover of the handpiece is arranged at the upper part of the handpiece head; the wind wheel is driven to rotate in the handpiece head by airflow in the handpiece hand shank; and the stoppers for preventing airflow in the handpiece hand shank from blowing into the bearings are arranged between the wind wheel and the bearings. The dental handpiece core has the beneficial effects that the stoppers for preventing airflow in the handpiece hand shank from blowing into the bearings are arranged between the wind wheel and the bearings; and the airflow generated by an air pipe in the hand shank is prevented from blowing into the bearings, so that the noise generated when the dental handpiece works is reduced; foreign matters mixed into the airflow are prevented from accelerating damages to the bearings; and lubricating grease in the bearings is prevented from being blown away to accelerate abrasion and damages to the bearings.

Description

technical field [0001] The invention relates to a medical device, in particular to a dental handpiece movement with additional stoppers. Background technique [0002] Dental handpiece is a high-speed rotary cutting medical device driven by airflow, with a speed ranging from 200,000 rpm to 600,000 rpm. It is mainly used for cutting teeth, preparing tooth cavities, preparing tooth shapes and trimming Tooth shape etc. [0003] The dental high-speed turbine handpiece is mainly composed of a handle and a head connected to the handle. The handle is equipped with a water inlet pipe, an air inlet pipe and a return air channel. The head includes a shell and a movement inside. The wind wheel and two bearings. The air pipe in the handle generates airflow to drive the wind wheel to rotate at high speed for cutting. In the composition of the existing dental handpiece movement, there is no sealing protection between the wind wheel and the bearing. The airflow generated by the air pipe ...

AI Technical Summary

Problems solved by technology

In the composition of the existing dental handpiece movement, there is no sealing protection between the wind wheel and the bearing. The airflow generated by the air pipe in the handle will blow into the bearing, resulting in abnormal noise when the dental handpiece is working. The noise is loud and mixed in the airflow. The foreign matter in the bearing will also accelerate the damage of the bearing, and the air flow will cause the grease inside the bearing to be blown away to accelerate the wear and tear of the bearing

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