ACTUATOR FOR DOOR OF AIR DUCT IN VEHICLE

摘要

PURPOSE: A door actuator of an air duct is provided to precisely control a flow of air supplied into a vehicle and to secure the durability of a product. CONSTITUTION: A door actuator includes a rotating member(20) to be rotated by the driving motor(10) and having many through holes(32); an optical sensor(30) having a light emitting unit(31) and a light collecting unit(33) in both sides of the through holes(23); an input button for controlling air in an instrument panel; and a control unit(40) to control a rotational angle of the driving motor(10) by signals of the input button and the optical sensor. Damage of the optical sensor(30) is prevented by separately installing from the rotating member(20). Thus, constitution is simple and a cost of a product is reduced by detecting the rotational angle of the driving motor(10) as a digital optical signal.