Hollow built-in blind
AssigneeShanghai King Hua IG Blinds Co., Ltd.
InventorsXuezhong Zhang, Szu-Chang Huang
Life of this patent
Estimating the term…
Abstract
A hollow built-in blind includes two glass plates, an annular spacer cooperating with the glass plates to define a receiving space, and a blind disposed in the receiving space and including a lower rail, a plurality of slats, and two pull cords connected to the lower rail. A transmission unit includes a transmission shaft, a winding mechanism disposed on the shaft, and a belt pulley fixed to one end of the shaft. A drive unit is located at one lateral end of the blind and includes a guide wheel spaced apart from the belt pulley, an internal control device operable to move upward and downward in the receiving space, and a timing belt looped over the belt pulley and the guide wheel and having two opposite ends connected to the internal control device to form a closed loop.
Claims6
A hollow built-in blind comprising:
- two glass plates;
- an annular spacer disposed between and cooperating with said glass plates to define a receiving space;
- a blind disposed in said receiving space and including a lower rail, a plurality of slats, and two pull cords each having one end connected to said lower rail and the other end extending through said slats;
- a transmission unit disposed in said receiving space above said blind and including a rotatable transmission shaft, a winding mechanism disposed on said transmission shaft, and a belt pulley fixed to one end of said transmission shaft, said other ends of said pull cords being connected to said winding mechanism after extending through said slats;
- and
- a drive unit disposed in said receiving space and located at one lateral end of said blind that is proximate to said belt pulley, said drive unit including a guide wheel spaced apart from said belt pulley, an internal control device operable to move upward and downward in said receiving space, and a timing belt looped over said belt pulley and said guide wheel and having two opposite ends connected to said internal control device to form a closed loop;
- wherein, when said internal control device is operated to move downward, said timing belt is pulled by said internal control device to drive rotation of said belt pulley which, in turn, drives rotation of said transmission shaft so as to wind said pull cords on said winding mechanism to thereby raise said slats;
- and
- wherein, when said internal control device is operated to move upward, said timing belt is pulled by said internal control device to drive reverse rotation of said belt pulley which, in turn, drives reverse rotation of said transmission shaft so as to unwind said pull cords from said winding mechanism to thereby lower said slats.
Dependencies are inferred from the claim text.