Patent ID: 7665507

Claim:
A blind having a shielding member coupled to a rotation shaft and in which the shielding member is raised and lowered upon rotation of the rotation shaft, the blind comprising: a pulley; a control member of which one end is connected to the pulley, the control member capable of being wound around and unwound from the pulley; an urging member providing an urging force on the pulley in the direction of winding the control member; a first clutch mechanism which is disposed between the rotation shaft and the pulley, the first clutch mechanism capable of linking the pulley and the rotation shaft with each other to transmit the rotation of the pulley to the rotation shaft, or the first clutch mechanism capable of interrupting the link between the pulley and the rotation shaft to interrupt the transmission of the rotation of the pulley to the rotation shaft; and a second clutch mechanism, the second clutch mechanism capable of linking the rotation shaft and a fixed member with each other, or the second clutch mechanism capable of interrupting the link between the rotation shaft and the fixed member, wherein: action on the control member and rotation of the pulley engages the first clutch mechanism to rotate the rotation shaft in one direction; another action on the control member and rotation of the pulley at a prescribed angle engages the second clutch mechanism to interrupt the link between the rotation shaft and the fixed member and enables the rotation shaft to rotate in the other direction; and another action on the control member and rotation of the pulley engages the first clutch mechanism or the second clutch mechanism to stop rotation of the rotation shaft while the rotation shaft is rotating in the other direction.