Patent ID: 11970901
Assignee: NIEN MADE ENTERPRISE CO., LTD.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 9:
10. A window blind, comprising:
a headrail;
a bottom rail;
a plurality of slats provided below the headrail;
a ladder string extending out of the headrail, wherein the ladder string comprises a first vertical portion, a second vertical portion, and a plurality of rungs for tilting the slats and the bottom rail;
an adjusting shaft, provided in the headrail and connected to the first vertical portion and the second vertical portion for adjusting a shape of the ladder string to tilt the slats and the bottom rail;
a first cord, extending out of the headrail and connected to a first side of the bottom rail, wherein the first cord locates at first sides of the slats;
a second cord, extending out of the headrail and connected to a second side of the bottom rail, wherein the second cord locates at second sides of the slats; and
an auxiliary adjusting module, provided in the headrail, connected to the adjusting shaft, and interfering with the first cord and the second cord, the auxiliary adjusting module comprising:
a follower, movable along with the adjusting shaft and comprising:
a bushing, sleeved on the adjusting shaft and rotatable along with the adjusting shaft; and
a transmission member, comprising a first transmission cord and a second transmission cord wherein a cord adjusting member comprises a first sliding base and a second sliding base which are movable; the first transmission cord is movable along with the first sliding base, and an end of the first transmission cord is fixedly connected to the bushing; the second transmission cord is movable along with the second sliding base, and an end of the second transmission cord is fixedly connected to the bushing; the first cord passes by the first sliding base, and the second cord passes by the second sliding base; and

the cord adjusting member being connected to the follower wherein the first cord and the second cord are movable along with the cord adjusting member; when the adjusting shaft is driven to turn the slats, the follower is driven by the adjusting shaft to move the cord adjusting member, which changes lengths of the first cord and the second cord respectively received in the headrail;

wherein when the first cord and the second cord are retracted, the slats and the bottom rail are received toward the headrail;
wherein when the first cord and the second cord are released, the slats and the bottom rail are expanded away from the headrail;
wherein when the adjusting shaft drives the slats to tilt toward a substantially vertical state in a first rotating direction, the auxiliary adjusting module releases the first cord out of the headrail and retracts the second cord into the headrail until each of the slats abuts an adjacent one of the slats;
wherein when the adjusting shaft drives the slats to turn from the substantially vertical state toward a substantially horizontal state in a second rotating direction opposite to the first rotating direction, the auxiliary adjusting module retracts the first cord into the headrail and releases the second cord out of the headrail.