A holder structure for a control cord of a curtain for quickly fixing the seamless control cord or a bead chain. The holder is composed of a base seat, an outer cover and elastic members and fixed on a wall face or a floor by fixing members. The base seat and the outer cover are respectively formed with two perforations. Each perforation has a cord passage formed on the same axis. The holder structure is characterized in that a thin connection block is formed at an inner end of the cord slit of the base seat to block the cord slit. When holding the control cord, with respect to a bead chain with a connector, the thin connection block keeps blocking the cord slit. With respect to a seamless control cord, the thin connection block is cut apart to unblock the cord slit for holding the seamless control cord.

A cord retractor for a window covering comprises a housing and a driving wheel, a reeling wheel, a spring, a friction member and a unidirectional transmission mechanism. The driving wheel and the reeling wheel can rotate with each other. The spring is coupled with the driving wheel and is wound on or unwound from the driving wheel according to a rotating direction of the driving wheel. The friction member is in a closed loop shape and surrounding a shaft of the housing. The unidirectional transmission mechanism is coupled with the friction member and the reeling wheel, and operated in different operation modes according to a rotating direction of the reeling wheel, by which the friction member provides constant resistance to the rotation of the reeling wheel when the reeling wheel rotates in a first direction, and stops providing resistance when the reeling wheel rotates in a second direction.

A cord retractor for a window covering comprises a housing and a driving wheel, a reeling wheel, a spring, a friction member and a unidirectional transmission mechanism. The driving wheel and the reeling wheel can rotate with each other. The spring is coupled with the driving wheel and is wound on or unwound from the driving wheel according to a rotating direction of the driving wheel. The friction member is in a closed loop shape and surrounding a shaft of the housing. The unidirectional transmission mechanism is coupled with the friction member and the reeling wheel, and operated in different operation modes according to a rotating direction of the reeling wheel, by which the friction member provides constant resistance to the rotation of the reeling wheel when the reeling wheel rotates in a first direction, and stops providing resistance when the reeling wheel rotates in a second direction.

A transmission stopping device for a cordless curtain includes a box assembly and a stop wheel assembly disposed in the box assembly. The stop wheel assembly includes a torsion wheel and a stop wheel. The stop wheel is provided with balls therein. A rotation-stopping assembly is provided between the stop wheel and the box assembly. The cooperation between the balls of the stop wheel and the rotation-stopping assembly in the box assembly ensures that the ascent and descent of a curtain achieves an accurate positioning.

A transmission stopping device for a cordless curtain includes a box assembly and a stop wheel assembly disposed in the box assembly. The stop wheel assembly includes a torsion wheel and a stop wheel. The stop wheel is provided with balls therein. A rotation-stopping assembly is provided between the stop wheel and the box assembly. The cooperation between the balls of the stop wheel and the rotation-stopping assembly in the box assembly ensures that the ascent and descent of a curtain achieves an accurate positioning.

The present disclosure provides an adjusting device for a curtain cord and a retractable curtain. The adjusting device for a curtain cord comprises a mounting base for fixedly connecting to the lower end of the curtain body, the mounting base is provided with a first threading hole for the cord to pass through, the mounting base is provided with a mounting groove thereon, the first threading hole is provided on the groove wall of the mounting base, and the adjusting device further comprises a stopper for winding and fixing the cord, a winding hole is provided throughout in the middle of the stopper for the cord to pass through, the stopper is detachably jammed within the mounting groove, and a gap for accommodating the cord wound on the outer surface of the stopper is located between the groove wall of the mounting groove and the stopper.

In one aspect, a cord retention assembly for a covering for an architectural structure may include a cord guide coupled to a shade panel of the covering that is configured to receive a corresponding cord of the covering. The cord guide may form a closed shape and may also be configured to define an entryway around at least a portion of a perimeter of the closed shape. In addition, the cord retention assembly may include at least one retention member installed relative to the cord guide such that the retention member(s) prevents the entryway of the cord guide from being rotated past the attachment location defined between the shade panel and the cord guide.

The locking tensioner comprises first and second elongate arms connected by a bridge. The distal end of the second arm has a tongue. The distal end of the first arm has a head with an aperture dimensioned to receive a chain therethrough, the head further having a slot dimensioned to releasably receive the tongue within the aperture. The second arm is pivotable relative to the first arm between a locked and an unlocked configuration. In the unlocked configuration, the tongue is disposed in the aperture to permit the chain to move through the aperture. In the locked configuration, the tongue applies a shear force between the chain and the head to restrict the movement of the chain. The bridge biases the first and second arms towards the locked configuration.

The locking tensioner comprises first and second elongate arms connected by a bridge. The distal end of the second arm has a tongue. The distal end of the first arm has a head with an aperture dimensioned to receive a chain therethrough, the head further having a slot dimensioned to releasably receive the tongue within the aperture. The second arm is pivotable relative to the first arm between a locked and an unlocked configuration. In the unlocked configuration, the tongue is disposed in the aperture to permit the chain to move through the aperture. In the locked configuration, the tongue applies a shear force between the chain and the head to restrict the movement of the chain. The bridge biases the first and second arms towards the locked configuration.

A spring loaded tensioning device for tensioning a flexible blind control element loop to be secured in position on a building, and having a housing shell; a hinged door on the housing shell operable between an open position for insertion of the control element and a closed position, a moveable lock in the housing shell, moveable between a locking position in which it clamps onto the element, and a released position in which the lock is free of the control element; and, a spring urging the lock to clamp onto the control element.