| 摘要 |
PROBLEM TO BE SOLVED: To provide a take-up roller control device for a light shielding curtain which improves transmission efficiency, rotates smoothly, and is simple in structure.SOLUTION: A take-up roller control device for a light shielding curtain includes: a spiral shaft 2 whose outer peripheral surface is provided with a thread groove 21; a sleeve shell 3 which surrounds the spiral shaft 2 and is rotatably arranged; a bearing 4 which is arranged inside the sleeve shell 3 and surrounds the spiral shaft 2; a transmission member 42 which is held inside the bearing 4 by the bearing 4 and the spiral shaft 2 and fitted into the thread groove 21; and rotation stop means 7 which is provided on the sleeve shell 3 and the bearing 4 so as to prevent rotation of the bearing 4. When the sleeve shell 3 is moved along a vertical axis L2, the spiral shaft 2 rotates around the vertical axis L2 since the transmission member 42 is engaged with the thread groove 21 and the rotation stop means 7 brakes the rotation of the bearing 4, whereby a light shielding curtain can be wound up. |
