Patent ID: 8757237

Claim:
A blind comprising: a first shield under a pressure that urges the first shield in any one direction of a lifting direction and a lowering direction; a second shield under a pressure that urges the second shield in any one direction of a lifting direction and a lowering direction; a first driving shaft rotatably supported and connected to the first shield such that a rotational direction of the first driving shaft corresponds to lifting or lowering of the first shield; a second driving shaft rotatably supported and connected to the second shield such that a rotational direction of the second driving shaft corresponds to lifting or lowering of the second shield; a first stopper capable of shifting between a state of allowing rotation of the first driving shaft in an urged direction of the first shield and a state of restricting the rotation of the first driving shaft; and a second stopper capable of shifting between a state of allowing rotation of the second driving shaft in an urged direction of the second shield and a state of restricting the rotation of the second driving shaft, an operating shaft capable of rotating upon receiving an operation force; a clutch capable of rotating integrally with the operating shaft and axially sliding on the operating shaft; a first transmission member disposed at one axial side of the clutch to transmit driving force to the first driving shaft; and a second transmission member disposed at another axial side of the clutch to transmit driving force to the second driving shaft; wherein a sliding direction of the clutch is determined by a rotational direction of the operating shaft, such that as the clutch sliding on the operating shaft becomes engaged with one of the transmission members, the rotation of the operating shaft is transmitted to either one of the driving shafts through one of the transmission members.