A double-layer cord rolling device includes a driving unit and a cord rolling unit disposed under the driving unit. The driving unit has an upper base, two upper wheels rotatably disposed on the upper base, and a torsion spring connected with the upper wheels. The cord rolling unit has a lower base, two lower wheels rotatably disposed on the lower base and coaxially mating with the upper wheels, and two transmission cords respectively connected with the lower wheels. One of the upper wheels is connected with one respective lower wheel through a transmission member, thereby rotatable synchronously. As a result, the double-layer cord rolling device of the present invention is shortened in length on the whole without affecting its functioning, thereby attaining the effect of miniaturization.

A spool assembly for a blind system comprising: a spool rotatable about a longitudinal axis, the spool having a cord collecting portion to collect and release a cord for extending and retracting a blind; and a support for the spool, to support the spool during rotation of the spool about the longitudinal axis, the support comprising: a first support component to support the spool towards the cord collecting portion of the spool; and a second support component locate the first support component with respect to a housing of the blind system, wherein the first and second support components are separable.

A double-layer cord rolling device includes a driving unit and a cord rolling unit disposed under the driving unit. The driving unit has an upper base, two upper wheels rotatably disposed on the upper base, and a torsion spring connected with the upper wheels. The cord rolling unit has a lower base, two lower wheels rotatably disposed on the lower base and coaxially mating with the upper wheels, and two transmission cords respectively connected with the lower wheels. One of the upper wheels is connected with one respective lower wheel through a. transmission member, thereby rotatable synchronously. As a result, the double-layer cord rolling device of the present invention is shortened in length on the whole without affecting its functioning, thereby attaining the effect of miniaturization.

A unidirectional wire take-up mechanism includes a fixing seat, a reel, a spindle, a unidirectional bearing, a bearing sleeve, a damping bounce member, and a positioning shaft. When the curtain is pulled down, the unidirectional bearing is locked, and the reel links the spindle through the bearing sleeve to rotate counterclockwise. When the spindle is rotated, the spindle and the damping bounce member generate a frictional force to form a damping effect, thereby providing a reaction force when the wire is released and offsetting part of the gravity of the curtain and effectively slowing down the speed and impact force when the curtain falls. When the curtain is rolled up, the reel links the bearing sleeve to rotate clockwise relative to the spindle, and the spindle and the damping bounce member have no relative movement, and the rotation has no resistance.

A window shutter actuation device includes a cord for driving window shutter slats to move, a retracting mechanism for winding an end of the cord away from the window shutter slats, a brake mechanism arranged between the retracting mechanism and the window shutter slats for controlling a retracting or releasing speed of the cord, and a power mechanism for driving the retracting mechanism to rotate to wind the cord. The retracting mechanism includes a frame, a reel rotatably mounted to the frame for winding the cord, and a wheel arranged outside and adjacent to an end of the reel. The end of the cord wound on the reel passes about the wheel and then extends to the brake mechanism after extending from the reel.

A window covering includes a head rail that supports a panel by lift cords such that one end of the panel may be raised and lowered relative to the head rail. An operating system controls movement of the panel and includes spools coupled to the lift cords such that rotation of the spools retracts and extends the lift cords. A shaft is connected to a spool of the lift spool assembly and to a brake and a spring motor. The spring motor applies a motor force to the shaft and the brake applies a brake force to the shaft such that the forces generated by the spring motor and brake hold the panel in the desired position.

A blind cord guide seat includes a connection seat fixed under a blind rail and a cord restriction seat connected under the connection seat. The cord restriction seat includes a fixing section and a latch section. An outer face of each of the fixing section and the latch section is formed with a belt guide channel. The top end of the fixing section is formed with threaded holes for connecting with the connection seat by screws. When assembled with a cord winding device, an external force is applied to the latch section to outward bias the latch section to provide an opening for placing the cord winding device through the opening into the cord restriction seat. An iron-made hook bracket and a latch body are securely disposed at the upper end of the latch section for securely latching the latch section with the connection seat.

A take-up device for a curtain includes a pull-cord, a reel mounted to a top beam of the curtain, an actuating mechanism for actuating the reel to rotate to retract or release the pull-cord, and a braking mechanism for braking the pull-cord. The reel defines a winding groove and an actuating slot. The actuating mechanism is a flat spiral-spring assembly. The flat spiral spring assembly includes a wheel arranged in parallel with the reel and a flat spiral-spring. An end of a reed of the flat spiral-spring is wrapped around the wheel, and an opposite end of the reed is fixed in the actuating slot. The top end of the pull-cord is wound on the winding groove, and an opposite end of the pull-cord extends out of the winding groove, extends through the braking mechanism, and then is fixed to a curtain body of the curtain.

A curtain reel structure for rapidly positioning and locking is disclosed herein. It mainly comprises a winding spool, a reel seat for an assembly of the winding spool and having a neck part, a removable lock element pivotally connected to the neck part of the reel seat, and a flexible member engaged with the neck part of the reel seat. The removable lock element pivots to change direction and contacts the flexible member to lift and lower the flexible member.

An electric curtain is provided which comprises a top rail, a bottom bar, a curtain body, a rope winding assembly, a drive device and an end seal; the top rail and the bottom bar are disposed in parallel up and down with the curtain body in between; the top rail is provided with opposed first end and second end; the end seal is disposed at the first end of the top rail and the drive device at the second end; the drive device is in transmission connection with the rope winding assembly; the drive device comprises a motor part and a power supply part; the motor part is disposed inside the top rail and connected to the rope winding assembly in a transmission manner; the power supply part is disposed outside the top rail; the motor part and the power supply part are disposed in parallel inside and out.