| 摘要 |
PURPOSE: A reduction device of a roller-shaped screen is provided to smoothly and flexibly wind a screen by appropriately dispersing the elastic force of a spring winding the screen. CONSTITUTION: A reduction device of a roller-shaped screen comprises a main shaft(10), a friction spring(20), and an auxiliary shaft(30). The reduction device comprises an eccentricity cask(40) and a chamber(50). One end of the main shaft is combined with a winding roller(4). The main shaft is unitarily rotated with the winding roller. One end of the friction spring is fixed and rotated with the main shaft. The friction spring reduces the speed of a screen(6), which uses the elastic force, by the frictional force. |
