| 摘要 |
PURPOSE:To obtain a high reliability damper opening/closing device by mounting a shape storage alloy coiled spring on an opening/closing plate and a substrate through a holder including a hold part for holding a connection part between a heater of the coiled spring and a lead wire. CONSTITUTION:A linear heater 15 having an insulating coating is wrapped around a shape storage alloy coiled spring 14. A coil storage end is inserted through four or more holes 16a formed in a flaty holder 16 and is rotatably engaged with the opening/closing plate 12 and a substrate 10 via a hook part 16b. When temperature in the cooling chamber is higher than a set value, the heater 15 is supplied with power, whereby the shape storage alloy coiled spring 14 is contracted to rotate the opening/closing plate 12 in an opening direction for permitting cool air to flow into the refrigerator from the open part 11. Reversely, once it is lower than the set value, the power supply to the heater 15 is stopped, whereby the temperature of the shape storage alloy coiled spring 14 is lowered to reduce an output therefrom, so that the opening/closing plate 12 is rotated in an closing direction by the spring 13 to close the opening part 11 of the substrate 10 for interrupting the flow of the cold air onto the refrigera tor. Thus, reliability is improved. |
