Window shade and its control module

摘要

A window shade comprises a head rail, a shading structure, a bottom part, suspension cords connected with cord winding units, and a control module. The control module includes a drive axle assembled with the cord winding units, a sleeve affixed with the drive axle, an arrester assembled around the drive axle, and a release unit. The arrester has a locking state in which the arrester blocks a rotational displacement of the sleeve and the drive axle to keep the bottom part at a desired position, and an unlocking state in which rotation of the sleeve and the drive axle is allowed to lower the bottom part by gravity action. The release unit includes an actuator that is operatively connected with the arrester and has an elongated shape. The actuator can rotate about its lengthwise axis to turn the arrester from the locking to unlocking state.

主权项

1. A control module of a window shade comprising:
a drive axle; a sleeve affixed with the drive axle; an arrester assembled around the drive axle, the arrester having a locking state in which the arrester blocks a rotational displacement of the sleeve and the drive axle to keep a shading structure of the window shade at a desired position, and an unlocking state in which rotation of the sleeve and the drive axle is allowed to lower the shading structure by gravity action, wherein the arrester includes a spring mounted around the sleeve, the spring tightening on the sleeve when the arrester is in the locking state, and the spring loosening when the arrester is in the unlocking state; and a release unit including an actuator, a collar operable to rotate about a rotation axis of the drive axle, and a plurality of transmission members connected between the collar and the actuator, the actuator being operatively connected with the arrester and having an elongated shape extending substantial vertical that defines a lengthwise axis, wherein the actuator is operable to rotate about the lengthwise axis to turn the arrester from the locking state to the unlocking state, the rotation of the actuator about the lengthwise axis being transmitted via the transmission members and driving a rotational displacement of the collar about the rotation axis of the drive axle to cause the spring to loosen.