Patent CA-2986853-A1 (CA)
Inventor: TAE-WOONG BYUN
IPC: E06B9/42
Filed: 2017-11-27
Abstract: Provided is a dual screen roll blind including two winding roll bodies which are roll-stored respectively so as enable light blocking or light shielding by adjusting vertical positions of two screens, including: a blind housing including a roll cover installed at an upper portion of a window and having an accommodation space of a predetermined length and the end plates formed at both ends of the roll cover; first and second winding roll bodies accommodated in the receiving space of the roll cover at a distance from each other, and rotatably installed at both ends of the end plates, and roll-storing first and second screens so that the positions of the first and second screens are vertically adjusted; a gear unit provided between the first and second winding roll bodies and either one of the end plates and including a driving gear is installed, which is axially coupled to the first winding roll body and chain-connected to a ball chain to rotatably operate the first winding roll body by rotation driving, a first switching connector provided between the first winding roll body and the driving gear and transferring rotation in only one direction of rotational directions of the driving gear to the first winding roll body, a driven gear receiving rotational force of the driving gear to rotatably operate the second winding roll body by an intermediate gear which is axially coupled to the second winding roll body to gear-engaging the first and second winding roll bodies along the end plate, and a second switching connector provided between the second winding roll body and the driven gear and transferring only the rotational force of the driven gear that rotates in a direction opposite to the rotational direction of the driving gear to the second winding roll body, and the winding roll body divided into the first and second winding roll bodies includes a winding roll drawing and storing the screen having a weight bar by rotating the screen in a roll manner, a winding rod fitted to one end of the winding roll and connected respectively to the driving gear or the driven gear so as to be rotatably operate by the rotational force transferred from the driving gear or the driven gear, and a support rod provided on the opposite end plate in correspondence with the winding rod and supporting the winding roll which rotates while being fitted into the other end of the winding roll, and the roll-stored screen is drawn by rotating the winding roll by the driving gear or the driven gear or by the rotational operation of the winding rod, and the rotational force of the winding roll is accumulated through the return spring incorporated in the support rod, and thereafter, elastically restored to roll-store the screen in the winding roll, and a result, it is possible to selectively draw two screens, to rapidly store an unrolled screen through automatic return and ensure child safe by a return spring and a limiter, and to achieve an increased scarcity value by giving novelty, 29 and a light transmitting property, and a light shielding property of the screen according to a taste of a user.