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 2222540
An operating device for a Venetian blind includes a positioning tube coupled to the shaft of the Venetian blind and formed with a top opening and an axially extending slot. An annular stop member is disposed in the receiving space adjacent to the top wall and has an inner surface that confines a tapered central hole which tapers upwardly. A retaining member is axially movable in the positioning tube, and has a tapered upper end portion which complements the tapered central hole and which is extendible into the tapered central hole. A biasing spring biases the retaining member upwardly so that pull ropes which extend through the positioning tube can be clamped between the tapered upper end portion and the stop member. An elongated sleeve is disposed around the positioning tube and is formed with a radial hole that is aligned with the pin hole. An insert pin extends through the radial hole, the slot and the pin hole. The elongated sleeve is movable downwardly relative to the positioning tube so as to move the tapered upper end portion downwardly away from the stop member for releasing the pull ropes.
Huang Tai-Long
Marks & Clerk
Taicang Kingfu Plastic Manufacture Co. Ltd
LandOfFree
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