Patent ID: 7234503

Claim:
A reduction device for a roll screen, the reduction device comprising: a winding bar having brackets provided on opposite ends thereof and a winding spring provided therein, wherein the winding bar further comprises a screen inserting part having a first groove formed in a longitudinal direction of the winding bar, and configured to receive an end of the roll screen such that the roll screen is configured to be wound and unwound; a fixing axis, having a screw threaded part formed on a peripheral surface, installed in the winding bar to operatively fix the reduction device, wherein one end of the fixing axis is coupled to at least one of the brackets; and a reduction nut having a second groove provided on its peripheral surface, which receives the screen inserting part of the winding bar, wherein the reduction nut, the fixing axis, the screen inserting part, and the winding spring are operatively connected to provide a damper assembly.