| 摘要 |
PROBLEM TO BE SOLVED: To reduce power consumption when people are allowed access over 24 hours. SOLUTION: This device includes a motor driving circuit 10 for rotating a motor 3 which brings a door into opening or closing movement, a control circuit 11 which outputs a control command to the motor driving circuit 10 when a human body detection signal is input thereto, and a power circuit 22 connected to each of the circuits. The contact 24a of a relay 24 is provided between the power circuit 22 and the motor driving circuit 10 and is opened if no human body detection signals are input to the control circuit 11 for more than a certain time. Thus when each circuit is made to carry current over 24 hours to allow people access, the motor driving circuit 10 does not carry current when there is few access, as during the night, resulting in reduced power consumption. |
