| 摘要 |
PROBLEM TO BE SOLVED: To provide a blind which enables two screen materials to be lifted/lowered by simple operations. SOLUTION: This blind includes: first and second drive shafts 42 and 44 which are rotatably supported and connected to first and second screen materials, respectively, and the rotation directions of which correspond to the ascending/descending motions of the first and second screen materials, respectively; first and second stoppers which can switch between the state of allowing the rotations of the first and second drive shafts corresponding to the urged directions of the first and second screen materials, and the state of regulating the rotations of them; an operation shaft 50 which is rotated by undergoing the transmission of an operating physical force; and a clutch 46 which is provided between the operation shaft 50 and the first and second drive shafts 42 and 44. The clutch 46 transmits the rotation from the operation shaft to either of the first and second drive shafts 42 and 44 when the operation shaft 50 is rotated in one direction, and transmits the rotation from the operation shaft 50 to the other one of the first and second drive shafts 42 and 44 when the operation shaft 50 is rotated in one direction after being rotated in the other direction. COPYRIGHT: (C)2010,JPO&INPIT
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