PURPOSE: To execute a motion having abundant change properties many times through simple structure by a method wherein a drive body formed by a shape memory alloy located between two wheels rotated only in a specified direction is combined with a spring energized in a direction in which the two wheels are separated away from each other or approach each other and the wheels are intermittently rotated.
CONSTITUTION: Since, with the switch of a battery 3 turned ON, a drive body 51 formed by a curved plateform shape memory alloy is energized and heated for elongation, a body 1 is changed from a curving shape A into a horizontal state B. Since, when energization is disconnected by means of a timer T of the battery 3, the drive body 51 is cooled, through the energizing force of a leaf spring 2, the body 1 is forced into a curved state C again. Since wheel 91 and 92 are moved only in a forward direction, when the body is changed from A to B, only the front wheel 91 is moved, and when it is changed from B to C, only the rear wheel 92 is moved. As noted above, the body 1 repeats intermittent movement by turning ON and OFF the timer, and a motion having secondary change properties is performed.
GENBAN KOEI
HIRAO KIMIO
