Abstract: A cordless blind device for external power drive is provided. The cordless blind device comprises: a winding roll; a screen member wound or unwound on the winding roll; a weight member connected to the lower end of the screen member to apply a torque in the direction in which the screen member is unwound; an elastic member for applying an elastic force to the winding roll to apply a torque in the direction in which the screen member is wound; and a power conversion module formed on at least one of the fixing brackets, and including a first driving shaft connected to the winding roll, a second driving shaft exposed to the outside of the fixing bracket and connected to a driving device connecting hole, and a gear box for transmitting power in both directions between the first driving shaft and the second driving shaft.

Abstract: A cordless blind device that can be operated in various types such as manual, semiautomatic, and automatic types is proposed. The cordless blind device includes: a winding roll, a screen, a driving motor, a weight connected to a lower end of the screen; a torsion spring applying torque in a direction in which the screen is wound; and a rotation conversion module transmitting power in two directions between the driving motor and the winding roll, in which when the driving motor does not generate driving force, the torque applied by the torsion spring, the torque applied by the weight, and resistance by the rotation conversion module and the driving motor make equilibrium, so the screen remains stopped, and when an external force is applied upward or downward to the weight, the equilibrium of the forces breaks, so the screen is wound on or unwound from the winding roll.

Abstract: The present invention provides a cordless blind apparatus that can be conveniently operated without a cord. The cordless blind apparatus includes: a roller that is fitted on a rotary shaft; a screen that is wound or unwound on the roller; a weight that is connected to the lower end of the screen and applies torque in a first direction in which the screen is unwound from the roller by the gravity; an elastic member that applies torque in a second direction in which the screen is wound, by applying elastic force to the roller; and a friction stopper assembly that generates friction force on the roller.

Abstract: The present invention provides a cordless blind apparatus and a method of adjusting the balance of a cordless blind apparatus. The cordless blind apparatus includes a roller, a screen wound or unwound on the roller, and a torsion spring contracting or stretching by rotating with the roller, in which an increasing ratio of torque applied to the roller by the screen and an increasing ratio of torque applied to the roller by the torsion spring are matched to each other through the correlation equation satisfied by parameters as the wire diameter ‘d’ of the torsion spring, the Young's modulus ‘E’ of the torsion spring, the diameter ‘D’ of the torsion spring, the winding number ‘N’ of the torsion spring, the density ‘?’ of the screen, the thickness ‘t’ of the screen, the width ‘S’ of the screen, the radius ‘R’ of the roller, and gravitational acceleration ‘g’.

Abstract: A cordless blind device that can be operated in various types such as manual, semiautomatic, and automatic types is proposed. The cordless blind device includes: a winding roll, a screen, a driving motor, a weight connected to a lower end of the screen; a torsion spring applying torque in a direction in which the screen is wound; and a rotation conversion module transmitting power in two directions between the driving motor and the winding roll, in which when the driving motor does not generate driving force, the torque applied by the torsion spring, the torque applied by the weight, and resistance by the rotation conversion module and the driving motor make equilibrium, so the screen remains stopped, and when an external force is applied upward or downward to the weight, the equilibrium of the forces breaks, so the screen is wound on or unwound from the winding roll.

Abstract: A cordless blind device for external power drive is provided. The cordless blind device comprises: a winding roll; a screen member wound or unwound on the winding roll; a weight member connected to the lower end of the screen member to apply a torque in the direction in which the screen member is unwound; an elastic member for applying an elastic force to the winding roll to apply a torque in the direction in which the screen member is wound; and a power conversion module formed on at least one of the fixing brackets, and including a first driving shaft connected to the winding roll, a second driving shaft exposed to the outside of the fixing bracket and connected to a driving device connecting hole, and a gear box for transmitting power in both directions between the first driving shaft and the second driving shaft.

Abstract: The present invention provides a cordless blind apparatus and a method of adjusting the balance of a cordless blind apparatus. The cordless blind apparatus includes a roller, a screen wound or unwound on the roller, and a torsion spring contracting or stretching by rotating with the roller, in which an increasing ratio of torque applied to the roller by the screen and an increasing ratio of torque applied to the roller by the torsion spring are matched to each other through the correlation equation satisfied by parameters as the wire diameter ‘d’ of the torsion spring, the Young's modulus ‘E’ of the torsion spring, the diameter ‘D’ of the torsion spring, the winding number ‘N’ of the torsion spring, the density ‘?’ of the screen, the thickness ‘t’ of the screen, the width ‘S’ of the screen, the radius ‘R’ of the roller, and gravitational acceleration ‘g’.

Abstract: The present invention provides a cordless blind apparatus that can be conveniently operated without a cord. The cordless blind apparatus includes: a roller that is fitted on a rotary shaft; a screen that is wound or unwound on the roller; a weight that is connected to the lower end of the screen and applies torque in a first direction in which the screen is unwound from the roller by the gravity; an elastic member that applies torque in a second direction in which the screen is wound, by applying elastic force to the roller; and a friction stopper assembly that generates friction force on the roller.

Abstract: A blind apparatus is provided. The blind apparatus includes: a plurality of rolls respectively coupled to rotary shafts that are parallel with each other; a plurality of screens respectively wound on or unwound from the rolls; and a plurality of weights respectively connected to the lower ends of the screens and applying torque in a first direction in which the screens are unwound to the rolls using gravity, in which the weights are combined with each other by magnetic force.

Abstract: The present invention provides an under-structure of a blind apparatus. An under-structure of a blind apparatus according to an embodiment of the present invention includes: a first bar that holds the lower end of a screen; a plug that is coupled to an end of the first bar and has a first through-hole at the center; a second bar that receives the first bar and has a slit through which the screen comes out; a cover that is fixed to an end of the second bar and has a second through-hole communicating with the first through-hole; and a wrench plug that is coupled to the outside of the cover and is fitted in the first through-hole through the second through-hole to transmit torque.

Abstract: The present invention provides an under-structure of a blind apparatus. An under-structure of a blind apparatus according to an embodiment of the present invention includes: a first bar that holds the lower end of a screen; a plug that is coupled to an end of the first bar and has a first through-hole at the center; a second bar that receives the first bar and has a slit through which the screen comes out; a cover that is fixed to an end of the second bar and has a second through-hole communicating with the first through-hole; and a wrench plug that is coupled to the outside of the cover and is fitted in the first through-hole through the second through-hole to transmit torque.

Abstract: The present invention relates to a dual roll blind enabling to control its light transmission amount and open and close with one ball-chain.

Abstract: A dual roll blind is provide. The dual roll blind may include a first screen and a second screen having light transmission portions and light shielding portions, respectively, a first winding bar and a second winding bar for respectively winding the first screen and the second screen, a first gear for rotationally driving the first winding bar, a second gear for rotating the second winding bar with rotating dependently on the first gear, an engagement maintaining portions for providing elasticity in the same direction as the mounting direction of the axis of rotation to one of the first gear or the second gear to prevent the gear from breaking away, and a clutch body holding inside the first gear, the second gear, and the engagement maintaining portions. The clutch body can include a setting hole corresponding to the engagement maintaining portions, and at least one of the first gear, and the second gear is interposed between the setting hole and the engagement maintaining portions.

Abstract: The present invention relates to a dual roll blind enabling to control its light transmission amount and open and close with one hall-chain and to easily reset the roll screen. The dual roll blind comprises.

Abstract: The present invention relates to a dual roll blind enabling to control its light transmission amount and open and close with one ball-chain and to easily reset the roll screen.

Abstract: The present invention relates to a dual roll blind enabling to control its light transmission amount and open and close with one ball-chain.

Abstract: A multiple choice shade system includes a main frame, a first winding roller rotatably supported on the main frame, a second winding roller rotatably supported on the main frame in a spaced-apart relationship with the first winding roller, a multiple choice shade element having a succession of screen sections, and an actuator for rotating at least one of the first winding roller and the second winding roller. The shade element has a first end fixedly secured to the first winding roller and a second end fixedly secured to the second winding roller. The shade element is suspended from the first winding roller and the second winding roller in such a manner that one of the screen sections is extended into or retracted from a target area as the first winding roller and the second winding roller are rotated by the actuator.

Abstract: A multiple choice shade system includes a main frame, a first winding roller rotatably supported on the main frame, a second winding roller rotatably supported on the main frame in a spaced-apart relationship with the first winding roller, a multiple choice shade element having a succession of screen sections, and an actuator for rotating at least one of the first winding roller and the second winding roller. The shade element has a first end fixedly secured to the first winding roller and a second end fixedly secured to the second winding roller. The shade element is suspended from the first winding roller and the second winding roller in such a manner that one of the screen sections is extended into or retracted from a target area as the first winding roller and the second winding roller are rotated by the actuator.