| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electric blind requiring reduced power consumption and having a self-weight descending function by a motor. <P>SOLUTION: This electric blind comprises a control part 12 for controlling the lifting operation of an interrupting member, a motor drive circuit 3 for supplying a drive current to the motor according to an instruction signal output from the control part, and a motor driving transformer 1 and a rectifying circuit 2 for supplying a DC current to the motor driving circuit. The control part 12 has a first switch means 11 which, when the instruction signal is not output, cuts out the supply of a commercial power to the motor drive transformer 1 and a second switch means 13 which, when an instruction signal is not output, short-circuits the current supply source of the motor 5 and stops the rotation of the output shaft of the motor. <P>COPYRIGHT: (C)2008,JPO&INPIT |
