Patent ID: 7819488
Filing Date: 2010-10-26
Classification: E05F,E05Y,F25D

Abstract:
1. A door opening device selectively opening a first door and a second door, comprising: an operating member selectively pressurizing the first door and the second door to be opened by rotation; a rotating cam having a plurality of protruding portions contacting the operating member to rotate the operating member and a plurality of depressed portions spaced apart from the protruding portions, the protruding portions and the depressed portions being formed alternately along a rotational direction of the rotating cam; a driving motor rotating the rotating cam in a forward direction and a reverse direction; a return part returning the operating member to an initial position after at least one of the first door and the second door is opened; and a sensing unit detecting a rotational position of the rotating cam to control operation of the driving motor, the sensing unit including magnets provided at front ends of the protruding portions and a sensor provided outside the rotating cam to sense the magnets.