| 摘要 |
An operator for a window covering held on a roller or axle has a stationary member having a central cavity and a first bore sized and positioned so that the roller can pass through the bore into the central cavity. A release brake is positioned so that the axle or roller can pass through and be held by the release brake. An inertial ring within the central cavity of the stationary member, surrounds a coil spring which encircles the axle. A release member is provided adjacent the release brake and the inertial ring. The release member is sized and positioned so that when the release ring is in a first position the release member will not engage the inertial ring or the release brake and when the release member is moved in a selected direction the release member will engage and turn the release brake and the inertial ring. A spool is positioned within the central cavity of the stationary member adjacent the inertial ring. A rewind spring is connected between the spool and the stationary member such that when a force acts on the spool to turn the spool in the first direction from the initial position the rewind spring will tighten and when the force is removed the spring will loosen causing the spool to return to the initial position. |
