PURPOSE: To perform drawing without any drawing instrument such as a rule, by accelerating the manual movement of a pen by mechanical force.

CONSTITUTION: The direction of human force applied to movable piece MO is detected by pressure sensing elements (PxWP-y), amplified by an analog amplifier A, and compared with a fixed threshold voltage f1 uniformly by a comparator C1. As a result, when the detection signal is greater than f1, "setting flip-flop FF" corresponding to the direction of application is reset and then set. For example, when force greater than f1 is applied only in the direction X, the output (1) of the comparator C1 is a low level voltage and the output terminal (2) of only a flip-flop FFx is held at the low level potential to open an NOR gate Gx. Consequently, a pulse motor M1 turns to apply mechanical force so that said movable piece MO moves in the direction X, and the X-directional human force is promoted linearly like a line is drawn with a rule.