TURBINE HAND DRILL IN DENTISTRY

摘要

A turbine hand drill in dentistry includes a head shell and a core. The head shell is provided with a socket for drill bit. The core includes a turbine (3) and a turbine shaft (7). Outside the socket for drill bit, an LED (5) connected with a power supply, mounted in the head shell, is provided. A generator which supplies power to light source is merely formed by way of adding an induction coil (4) in the original head. An LED (5) filament includes at least two parallel light emitting diode arrays in counter conducting directions. The filaments are arranged in a loop. A check valve (14) is mounted on an outlet passage, and it is used as a power switch. The turbine shaft (7) is a magnetic bearing. The turbine (3) is made from magnetically permeable material.