To enable power adjustment such as torque adjustment without degrading usability in electrically powered equipment such as a power tool which does not have power adjustment function.
An output voltage regulator 301, an output current regulator 302, and an output stop regulator 303 are provided at a power regulator 3b of an adapter 3 to set the time until the power supply to be supplied to the power tool 4 is stopped. The power regulator 3b transmits signals based on the preset value to a DC power supply body 2. The DC power supply body 2 detects the signals, and supplies electric power to the power tool 4 with voltage/current based on a preset value to stop the power supply at the preset time. The signals are transmitted to the DC power supply body 2 through a cord 316 or wireless communication, thus performing torque adjustment of the power tool 4.
ARADATE TAKAHISA
Shin Koizumi
Akiko Ichikawa
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