| 摘要 |
A blind comprises a turnably supported pulley, a control member of which one end is connected to the pulley so as to permit the control member to be wound around and unwound from the pulley, an urging member which urges the pulley in the direction of winding the control member, a first clutch mechanism which is disposed between the rotation shaft and the pulley, and can selectively link the pulley and the rotation shaft with each other to transmit the rotation of the pulley to the rotation shaft or unlink the pulley and the rotation shaft from each other to interrupt the transmission of the rotation of the pulley to the rotation shaft, and a second clutch mechanism which can selectively link the rotation shaft and a fixed member with each other or unlink them from each other.
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