DAMPER DRIVER

PURPOSE:To bend the damper plate of shape-memory resin, softened by the excitation of a film heater, by the effect of a magnet and permit the opening of an opening by a method wherein the damper plate, opening and/or closing the opening, through which cold air flows, is formed of the shape-memory resin and the plane type film heater is superposed on the damper plate while the permanent magnet, secured to the free end of the damper plate, is opposed to an electromagnetic coil. CONSTITUTION:The thin plate of a leaf spring, having an elastic force, whose direction is same as the direction of opening an opening 2, or the thin plate 11 of a shape- memory alloy, bent toward the same direction upon the rising of the temperature thereof, are superposed on a damper plate 3. According to this constitution, the damper plate 3 closes the opening 2 while keeping the shape of a plane by the force of the damper plate 3 itself, which tries to become a plane against the resilient force of the thin plate 11, and the effect of a permanent magnet 7 at all times. When a film heater 4 is excited, the elastic force of the thin plate 11 or the bending force of the shape-memory alloy are added to the repulsive force of the permanent magnet 7 whereby the damper plate 3 is bent and opens the opening 2 while the damper plate 3 is descended after cooling and, therefore, the shape of the damper plate is kept as it is.