A plastic dental hand piece wind wheel, movement and handpiece

Abstract

A plastic dental hand piece wind wheel, which is composed of a wind wheel shaft and a wind wheel blade, a wind wheel blade bracket is arranged between the wind wheel blade and the wind wheel shaft, and the length of the wind wheel blade along the wind wheel shaft axis is greater than that of the wind wheel blade bracket along the wind wheel axis to the length. In the core, the two bearing seats are respectively fixed on the core cylinder through the bearing frame, the bearing is arranged on the wind wheel shaft in the bearing socket, the bearing inner ring is fixed on the wind wheel shaft, and the bearing outer ring is fixed on the bearing seat. The two bearing seats are respectively fixed on the core cylinder by the bearing frame to form the core. The machine head includes a wind wheel and a machine head shell, and a bearing is arranged on the wind wheel shaft in the bearing socket, the inner ring of the bearing is fixed on the wind wheel shaft, the outer ring of the bearing is fixed on the bearing seat, and the two bearing seats are fixed by the bearing seat The power part of the machine head is formed on the machine head shell, and the annular battery is fixed inside the other part of the machine head shell. LED lights are arranged around the bur insertion hole outside the machine head shell. The LED lights and the ring battery are connected by wires to form the light part. Two-part nose connection.

Description

technical field [0001] The invention relates to a plastic dental handpiece wind wheel, a core and a machine head, which are parts of a dental cutting device; the plastic refers to the machine head shell, wind wheel shaft and wind wheel in the prior art. The blades are all plastic. Background technique [0002] In general, the head of an air cutting device for dental use has a head at its tip, and the necessary parts of the cutting tool are installed in the head, including the rotor shaft of the cutting tool and the two supporting rotary shafts. The bearing and the impeller arranged between the two bearing parts make the high-pressure air supplied from the air supply passage arranged in the handle part of the handpiece hit the impeller to rotate the cutting tool. However, in the air-type cutting device with such a structure, because the machine head extends into the oral cavity, it is easy to block the light and cause inconvenience in operation. In the existing hand-held dri...

AI Technical Summary

Problems solved by technology

However, in the air-type cutting device with such a structure, because the machine head extends into the oral cavity, it is easy to block the light and cause inconvenience in operation. In the existing hand-held drill with light, the light cannot directly shine on the drill bit, and the anti-suckback device is complicated.

The company has applied for the application number PCT / CN2010 / 073256, the international application for the invention name dental turbine hand-held drill, although the light can directly shine on the drill bit, and the anti-suckback device is simple, but when the annular battery is placed outside the outer ring of the bearing , so that the space for accommodating the ring-shaped battery is very small, the volume of the battery will be very small, which increases the difficulty of manufacturing the ring-shaped battery. If the ring-shaped battery is arranged in parallel with the bearing, the axial length of the machine head will be increased.

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