CONTROLLING MECHANISM FOR CORDLESS BLIND SET

摘要

A controlling mechanism for a cordless blind set includes a fastening seat, a controlling member, and two driving gears. A coil spring is between the two driving gears each engaged with a driven gear. Each of the driven gears is coupled with a transmission rope passing through the fastening seat and the controlling member and then gets fixed in an upper beam. To operate the blind set, a pushing force is applied to the controlling member to release the transmission ropes. The driving gears are then driven by the coil spring and rotate the driven gears simultaneously, so the driven gears can roll up/release the transmission ropes.

主权项

1. A controlling mechanism for a cordless blind set, the cordless blind set having an upper beam, a low beam, and a blind body formed between the upper and lower beams, and the controlling mechanism comprising:
two controlling assemblies, each having a fastening seat, a controlling member, and a returning elastic member; the fastening seat being deposited on the lower beam and having at least one first rope hole, at least one second rope hole opposite to the first rope hole, and an accommodating socket communicated between the first and second rope holes; the controlling member being such received in the accommodating socket of the fastening seat that it is movable between a retained position and a released position and having at least one rope channel; the returning elastic member being provided between the fastening seat and the controlling member, for normally holding the controlling member at the retained position; a gear assembly, being located between the two controlling assemblies and having a gear seat, two driving gears, two driven gears, and at least one coil spring; the gear seat being fixed in the lower beam; the two driving gears being rotatably fixed to the gear seat and engaged with each other; the two driven gears being rotatably fixed to the gear seat and engaged with one said driving gear, respectively; the coil spring being connected to the two driving gears and selectably wound around one of the two driving gears; and at east two transmission ropes, passing through the first and second rope holes of one said fastening seat and the rope channel of one said controlling member; each said transmission rope having one end fixed to the upper beam and having an opposite end fixed to one said driven gear of the gear assembly; wherein, when the controlling member is at the retained position, it comes into interference with the transmission ropes, so that the driven gear is unable to roll up or release the transmission ropes, and when the controlling member is at the released position, the transmission ropes are released, so that the driven gear is able to roll up or release the transmission ropes.