E - Fixed Constructions – 06 – B
Patent
E - Fixed Constructions
06
B
E06B 9/32 (2006.01) E06B 9/303 (2006.01) E06B 9/307 (2006.01) E06B 9/326 (2006.01)
Patent
CA 2222487
An operating device for a Venetian blind includes a hollow positioning tube, a stationary roller, a releasable clamping unit, and an elongated sleeve. The positioning tube confines a receiving space that is adapted to permit extension of pull ropes of the Venetian blind thereinto. The stationary roller is disposed in the receiving space and is mounted rotatably to the positioning tube. The releasable clamping unit includes a movable roller suspended in the receiving space at one side of the stationary roller such that the stationary roller and the movable roller are adapted to permit extension of the pull ropes therebetween, and a biasing spring for biasing the movable roller toward the stationary roller so that the movable roller cooperates with the stationary roller in order to be adapted to clamp the pull ropes therebetween. The elongated sleeve is mounted coaxially on and slidable axially relative to the positioning tube and is associated operably with the releasable clamping unit so that the movable roller is moved away from the stationary roller for releasing the pull ropes when the elongated sleeve is moved downwardly relative to the positioning tube.
Huang Tai-Long
Marks & Clerk
Taicang Kingfu Plastic Manufacture Co. Ltd
LandOfFree
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