| 摘要 |
PROBLEM TO BE SOLVED: To provide a screen lifting device of an electric roll blind enabling easy replacement of a position detection device. SOLUTION: In the electric roll blind, a winding shaft 4 is rotatably supported between a pair of side brackets and a screen is lifted by rotating the winding shaft 4 with the drive force of a motor 17 stored in the winding shaft 4. The electric roll blind comprises the position detection device for detecting the lifted position of the screen. The position detection device includes a photo sensor 21 attached to a side bracket 3b and a detection pattern which is attached to the end of the winding shaft 4 so as to face the photo sensor 21 for detecting the rotation of the winding shaft by the photo sensor 21. COPYRIGHT: (C)2010,JPO&INPIT |
