<p>When a drive control section of a portable terminal (1) receives a rotational force output command, it outputs a drive control voltage from a source voltage of a battery in a battery section to a rotation motor in a drive section (C). Upon receiving the drive control voltage, the rotation motor of the drive section (C) rotates a rotating shaft to output rotational force to a portable terminal (2). When the rotating shaft is inserted into the portable terminal (1) and portable terminal (2), a rotational force output (reception) mechanism provided at a drive section of each portable terminal is gradually depressed. As a result, a vibrating weight provided at the drive section is receded from the rotation motor and combined with the rotational force output (reception) mechanism and the rotation motor. This enables a rotational force producing device to output rotational force to the outside and to receive rotational force from the outside.</p>
