ELEVATION OPERATING APPARATUS FOR BLIND

摘要

PURPOSE: A device for controlling the lift of a venetian blind is provided to prevent a shading blade from falling on the contrary to the intention of a user since whether a rod will rotate in the release direction of a ribbon is determined by the selection of the user. CONSTITUTION: A device for controlling the lift of a venetian blind comprises a ribbon drum(100), a main shaft(200), a rod(300) and an one-way clutch(400). The ribbon drum holds a ribbon(110) and revolves on an axis. The main shaft is connected to the axis in order to be able to receive the torque of the ribbon drum. The rod is connected to the main shaft in series and rolls or unrolls the wire of the blind in a rotating direction. The one-way clutch limits the rotating direction of the main shaft so that the main shaft can rotate in one direction. The one-way clutch cancels the limitation to the rotating direction of the main shaft so that the main shaft can rotate in two directions.