CONTROL MODULE OF CORDLESS WINDOW COVERING

摘要

A control module of a cordless window covering is disclosed, wherein a first prestressing device and a second prestressing device are provided on two lateral sides of a reel which is adapted to be wound around by lifting cords. In the condition that one single reel is wound around by two lifting cords, the number of gears linked to be rotated together could be reduced. In the condition that the control module is applied to a large window covering which has odd numbers of lifting cords, the pulling force provided by the first prestressing device and the second prestressing device could be distributed evenly on the reel, and the control module could effectively withstand the loadings of the lifting cords, which prevents the window covering from tilting, or prevents the problem that the springs are insufficient to bear the loadings.

主权项

1. A control module of a cordless window covering, comprising:
a base; a first prestressing device provided on the base, wherein the first prestressing device comprises two first drums and a first spiral spring; each end of the first spiral spring is respectively connected to one of the first drums; one of the first drums has a first gear; a second prestressing device provided on the base, wherein the second prestressing device comprises two second drums and a second spiral spring; each end of the second spiral spring is respectively connected to one of the second drums; one of the second drums has a second gear; and at least one reel provided on the base, wherein the at least one reel is adapted to be wound by at least one lifting cord; the at least one reel is located between the first prestressing device and the second prestressing device, and each of the at least one reel comprises at least one intermediate gear; the first gear of the first prestressing device and the second gear of the second prestressing device are linked to rotate together through the at least one intermediate gear of the at least one reel.