A blind pull cord connector has a cord passage section and a connection section. The cord passage section has more than one cord passage bodies, each of which is formed with a through hole. An inner face of each cord passage body is formed with a cut face. The connection section is passed through a punched hole of rear side of a blind slat, whereby the cord passage section is positioned on outer side of the slat. When the slat is horizontally opened or vertically closed, the connector structure is limited by the slat so that the connector is connected with the blind slat and naturally kept horizontal. In this case, a pull cord can be easily and quickly passed through the through holes of the cord passage bodies, whereby the frictional resistance against the pulling of the pull cord is reduced and the slats can be more tightly closed. In addition, by means of the restriction of the cord passage bodies of the cord passage section, a ladder cord and the pull cord are located. When the slats are displaced, under the pullback of the cord passage bodies, the positions of the slats can be automatically micro-adjusted to restore to a flush state.

A retractable, coilable, security barrier screen easily mounted around a door, window or other building opening such as a hallway entrance. The barrier is designed to withstand considerable forces from blunt force strikes, bullets and edged weapon slashing. As such, it has a strengthened spool tube, novel security barrier attachment methods, and redundant operational features such as dual (top and bottom spool locks), quad spool locking pins and a dual attachment for the fabric security barrier to the screen lock strip that includes both gluing and plate riveting.

An improved roller shade system provides increased support, additional adjustments and/or increased safety. The slip plate allows the brake to slip forward and minimize damage to the clutch spring when a user pulls too hard on the hembar. The center drive mechanism extends through a bracket to allow the drive shaft to distribute power in both directions and drive two shade tube simultaneously. The tube adapter absorbs force from the spinning shade tube to minimize damage to the other components and the bead chain. The sprocket has a back wall supporting the sprocket, allowing the sprocket 130 to rest on the back flange of the sun gear to minimize pressure on the gears. An adjustment arm is adjusted to help level the shade band. The shade bands may be removed without disturbing the other shade bands in the system. A height of a hembar may be adjusted by rotating a rod within the hembar.

An improved roller shade system provides increased support, additional adjustments and/or increased safety. The slip plate allows the brake to slip forward and minimize damage to the clutch spring when a user pulls too hard on the hembar. The center drive mechanism extends through a bracket to allow the drive shaft to distribute power in both directions and drive two shade tube simultaneously. The tube adapter absorbs force from the spinning shade tube to minimize damage to the other components and the bead chain. The sprocket has a back wall supporting the sprocket, allowing the sprocket 130 to rest on the back flange of the sun gear to minimize pressure on the gears. An adjustment arm is adjusted to help level the shade band. The shade bands may be removed without disturbing the other shade bands in the system. A height of a hembar may be adjusted by rotating a rod within the hembar.

The object of the present invention is to provide a lifting type push-pull positioning curtain which can realize the self-locked positioning of the curtain body without the exposed drawstring and can adjust the unfolding length of the curtain body infinitely. A lifting type push-pull positioning curtain, comprises a curtain body, a mounting box and a push-pull positioning device. The push-pull positioning device comprises an active reel, a transmission wheel set and a slave reel. The transmission wheel set comprises a driving wheel and a driven wheel, the driven wheel receive a scroll spring therein, the head end of the scroll spring is connected to the driving wheel; the active reel and the slave reel are wound with a thread rope therein respectively, and one end of the thread rope is fixed to the reel and the other end thereof is fixed to the bottom of the curtain.

The object of the present invention is to provide a lifting type push-pull positioning curtain which can realize the self-locked positioning of the curtain body without the exposed drawstring and can adjust the unfolding length of the curtain body infinitely. A lifting type push-pull positioning curtain, comprises a curtain body, a mounting box and a push-pull positioning device. The push-pull positioning device comprises an active reel, a transmission wheel set and a slave reel. The transmission wheel set comprises a driving wheel and a driven wheel, the driven wheel receive a scroll spring therein, the head end of the scroll spring is connected to the driving wheel; the active reel and the slave reel are wound with a thread rope therein respectively, and one end of the thread rope is fixed to the reel and the other end thereof is fixed to the bottom of the curtain.

A quick-action roll-up door (1) for a cold storage room has a flexible door panel (5), which is windable onto a horizontal shaft (4) in a vertical running direction for purposes of closing a door opening (2) bounded by a door frame (3). A winding drive (6) opens and closes the door, together with a pressure application frame (8), subjecting the door panel in a closing position to force, transverse to a planar face of the door panel, in the direction of the door frame. Furthermore, device features are provided, which apply force to the pressure application frame in the direction of the door frame when the roll-up door is closed, and relieve it when it is opened. The device features have a traction drive (14), which is functionally connected to the winding drive for the door panel, and which controls the movement of the pressure application frame.

A quick-action roll-up door (1) for a cold storage room has a flexible door panel (5), which is windable onto a horizontal shaft (4) in a vertical running direction for purposes of closing a door opening (2) bounded by a door frame (3). A winding drive (6) opens and closes the door, together with a pressure application frame (8), subjecting the door panel in a closing position to force, transverse to a planar face of the door panel, in the direction of the door frame. Furthermore, device features are provided, which apply force to the pressure application frame in the direction of the door frame when the roll-up door is closed, and relieve it when it is opened. The device features have a traction drive (14), which is functionally connected to the winding drive for the door panel, and which controls the movement of the pressure application frame.

An improved roller shade system provides increased support, additional adjustments and/or increased safety. The slip plate allows the brake to slip forward and minimize damage to the clutch spring when a user pulls too hard on the hembar. The center drive mechanism extends through a bracket to allow the drive shaft to distribute power in both directions and drive two shade tube simultaneously. The tube adapter absorbs force from the spinning shade tube to minimize damage to the other components and the bead chain. The sprocket has a back wall supporting the sprocket, allowing the sprocket 130 to rest on the back flange of the sun gear to minimize pressure on the gears. An adjustment arm is adjusted to help level the shade band. The shade bands may be removed without disturbing the other shade bands in the system. A height of a hembar may be adjusted by rotating a rod within the hembar.

An improved roller shade system provides increased support, additional adjustments and/or increased safety. The slip plate allows the brake to slip forward and minimize damage to the clutch spring when a user pulls too hard on the hembar. The center drive mechanism extends through a bracket to allow the drive shaft to distribute power in both directions and drive two shade tube simultaneously. The tube adapter absorbs force from the spinning shade tube to minimize damage to the other components and the bead chain. The sprocket has a back wall supporting the sprocket, allowing the sprocket 130 to rest on the back flange of the sun gear to minimize pressure on the gears. An adjustment arm is adjusted to help level the shade band. The shade bands may be removed without disturbing the other shade bands in the system. A height of a hembar may be adjusted by rotating a rod within the hembar.