Control System of an Electrical Treatment Chair for E.N.T. Doctor

The treatment chair includes a chair-seat and a chair-back from mechanics, which are both controlled by a linear actuator respectively. Thus, after the mechanical principle of the treatment chair is introduced, we present a control system and its control schematics in detail. Functionally, the control system takes advantage of all buttons on the control panel for the treatment chair and four foot-pedal-switches to control the movements of the linear actuators, so as to achieve the purpose of controlling the chair-seat up or down, and the chair-back elevated or depressed. How to set all functions of the treatment chair is also given at the end of the paper.