A drive mechanism using shape memory alloy which, even if used repeatedly, is free from the weakening or loss of the shape memorized by the driving member of the shape memory alloy and capable of driving driven members accurately for a long period of time, and an apparatus using this drive mechanism. On the one hand, chipboards, fiberboards and chipfiber combination boards can be manufactured in an economically favorable manner with the apparatus and method described. The housing includes a cavity for inserting terminals of the earphone plug. In the forward stroke, the default table is changed to the alternate table when the detection value passes a second threshold value provided on a deeper depression depth side than a first threshold value.