| CPC E06B 9/68 (2013.01) [E06B 9/44 (2013.01); E06B 9/78 (2013.01); E06B 2009/785 (2013.01)] | 19 Claims |
|
1. A blind lifting control module connectable with an end of a horizontal axle for controlling rotation of the axle, comprising:
a supporting unit including a base seat and a mounting shaft which is securely connected with said base seat and which extends parallel to the horizontal axle from said base seat, said mounting shaft having a shaft portion;
a transmitting wheel rotatably sleeved on said mounting shaft, and including an axle connecting body which is securely connectable with the end of the horizontal axle, and a flange disc which is connected with a side of said axle connecting body proximate to said base seat and which extends radially and outwardly from said axle connecting body, said axle connecting body having a receiving groove which extends from said side for receiving said shaft portion, and a first ratchet portion which is formed in said receiving groove and faces said base seat, said flange disc having a second ratchet portion which is formed on a surface that faces said base seat and surrounds said receiving groove;
an anti-backward unit including an anti-backward wheel and a biasing returning member which are received in said receiving groove, said anti-backward wheel having a movable wheel body which is movably sleeved on said shaft portion, and a third ratchet portion which is formed on a surface of said movable wheel body and faces said first ratchet portion, said anti-backward wheel being movable relative to said shaft portion between an anti-backward position, where said third ratchet portion meshes with said first ratchet portion to permit a uni-directional rotation of said transmitting wheel, and a released position, where said third ratchet portion is disengaged from said first ratchet portion, said biasing returning member being disposed to bias said anti-backward wheel to the anti-backward position; and
a driving unit including a driving reel which is rotatably sleeved on said shaft portion, a transmitting member which is connected between said driving reel and said anti-backward wheel to transmit a rotation of said driving reel to move said anti-backward wheel to the released position, a thrust member which is movably disposed to said base seat, a hindering member which is pivotably disposed to said base seat, a pull cord which has an end secured to said driving reel and which winds on a periphery of said driving reel to have a free end for pulling operation, and a reel biasing member,
said driving reel having a fourth ratchet portion which faces said second ratchet portion and being movable relative to said shaft portion between a driving position, where said fourth ratchet portion meshes with said second ratchet portion, and a normal position, where said fourth ratchet portion is disengaged from said second ratchet portion, said thrust member being movable relative to said base seat between an initial position, where said thrust member is free from action with said driving reel, and a thrusting position, where said thrust member provides a thrust force to move said driving reel to the driving position, said hindering member being turnable relative to said base seat between a hindering position, where said hindering member is kept to position said thrust member in the initial position, and a keeping-off position, where said thrust member is allowed for movement to the thrusting position, said free end of said pull cord passing through said hindering member to receive a pulling force to turn said hindering member, said reel biasing member being disposed to bias said driving reel to rotate to reel said pull cord.
|