Double-layer cord rolling device for non-pull cord window blind
AssigneeJumbo Home Deco. Corporation
InventorPO-YU CHEN
Life of this patent
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Abstract
A double-layer cord rolling device includes a driving unit, and a cord rolling unit disposed under the driving unit. The driving unit has an upper base, two torsion spring gears rotatably disposed in the upper base and engaged with each other, and a torsion spring connecting the two torsion spring gears. The cord rolling unit has a lower base connected with the upper base, two cord rolling wheels disposed in the lower base in a way that they are capable of rotating synchronously and coaxial with the torsion spring gears respectively, and two lift transmission cords connected to the two cord rolling wheels respectively. A transmission shaft is employed to connect a torsion spring gear and a corresponding one of the cord rolling wheels , enabling them to rotate synchronously.
Claims10
A double-layer cord rolling device for a non-pull cord window blind, the double-layer cord rolling device comprising:
- a driving unit having an upper base, a first torsion spring gear, a second torsion spring gear and a torsion spring, the first and second torsion spring gears being rotatably disposed in the upper base and engaged with each other, the torsion spring connecting the first and second torsion spring gears;
- a cord rolling unit having a lower base, a first cord rolling wheel, a second cord rolling wheel and two lift transmission cords, the lower base being connected with the upper base of the driving unit, the first and second cord rolling wheels being disposed in the lower base in a way that the first and second cord rolling wheels are capable of rotating synchronously and coaxial with the first and second torsion spring gears of the driving unit respectively, an end of one of the two lift transmission cords being connected to the first cord rolling wheel, an end of the other lift transmission cord being connected to the second cord rolling wheel;
- and
- a first transmission shaft connecting the first torsion spring gear of the driving unit and the first cord rolling wheel of the cord rolling unit.
The double-layer cord rolling device as claimed in claim I, wherein the first cord rolling wheel has a first axial portion, a first upper toothed disc portion and a first lower toothed disc portion;
- the first axial portion is connected with a corresponding one of said the lift transmission cords;
- the first upper toothed disc portion is connected to a top end of the first axial portion;
- the first lower toothed disc portion is connected to a bottom end of the first axial portion;
- the second cord rolling wheel has a second axial portion, a second upper toothed disc portion and a second lower toothed disc portion;
- the second axial portion is connected with a corresponding one of the lift transmission cords;
- the second upper toothed disc portion is connected to a top end of the second axial portion and engaged with the first upper toothed disc portion of the first cord rolling wheel;
- the second lower toothed disc portion is connected to a bottom end of the second axial portion and engaged with the first lower toothed disc portion of the first cord rolling wheel.
The double-layer cord rolling device as claimed in claim I, wherein the cord rolling unit further has two vertical rods disposed at two ends of the lower base and abutted against the lift transmission cords respectively.
Dependencies are inferred from the claim text.