ABSTRACT
The spread of COVID-19 that derived from SARS-CoV-2 has brought serious disasters to human society. Especially in places such as hospitals and hotels where are densely populated, the close contact of people is more likely cause the spread of the virus. So in this paper, we develop a novel automatic electromechanical device, i.e. elevator button with disinfection function, for such places. The disinfection principle is mainly from that the far ultraviolet c (UVC as abbreviation) ray has good inactivation effect on SARS-Cov-2, and we use STM32 to control a proposed ratchet mechanism to drive the ultraviolet lamp to disinfect the elevator button when there are few people at night while to work normally in the day time. Finally the experiment verifies that the proposed device can work safely and disinfect virus effectively.