| 摘要 |
<p>An operator for a window covering held on a roller or axle (2) has a stationary member (13) 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 (15) is positioned so that the axle or roller can pass through and be held by the release brake (15). An inertial ring (30) within the central cavity of the stationary member, surrounds a coil spring (23) which encircles the axle (2). A release member (32) is provided adjacent the release brake (15) and the inertial ring (30). The release member (32) is sized and positioned so that when the release ring is in a first position the release member will not engage the inertial ring (30) or the release brake (15) and when the release member (32) is moved in a selected direction the release member (32) will engage and turn the release brake and the inertial ring. A spool (19) is positioned within the central cavity of the stationary member adjacent the inertial ring. A rewind spring (21) is connected between the spool (19) and the stationary member such that when a force acts on the spool (19) in the first direction from the initial position the rewind spring (21) will tighten and when the force is removed the spring (21) will loosen causing the spool (19) to return to the initial position.</p> |
