A pre-loadable spring roller blind, including a spring bar, a limiting spring, a spring tail plug and a limiting pipe plug sleeve. By arranging the spring tail plug into the first rotating plug and the first adjusting core and arranging the holding spring between the first rotating plug and the first adjusting core, the first adjusting core can be rotated to store the force for the limiting spring. After the torsion force is stored, the spring may not discharge the force when released. When the limiting pipe plug sleeve is used for loading, as long as the tail of the spring bar is fixed, the limiting pipe plug sleeve is rotated to store a force for the limiting spring. After the force is stored, the limiting pipe plug sleeve can be released at any time and the limiting pipe plug sleeve is kept fixed

A blind assembly for building openings is provided. The blind assembly is switchable from having one roller tube to more roller tubes by changing the number of end plates. The blind assembly may also include a chain guide to guide the chains from the roller tubes such that the chains do not interfere with each other.

A blind assembly for building openings is provided. The blind assembly is switchable from having one roller tube to more roller tubes by changing the number of end plates. The blind assembly may also include a chain guide to guide the chains from the roller tubes such that the chains do not interfere with each other.

A pre-loadable spring roller blind, including a spring bar, a limiting spring, a spring tail plug and a limiting pipe plug sleeve. By arranging the spring tail plug into the first rotating plug and the first adjusting core and arranging the holding spring between the first rotating plug and the first adjusting core, the first adjusting core can be rotated to store the force for the limiting spring. After the torsion force is stored, the spring may not discharge the force when released. When the limiting pipe plug sleeve is used for loading, as long as the tail of the spring bar is fixed, the limiting pipe plug sleeve is rotated to store a force for the limiting spring. After the force is stored, the limiting pipe plug sleeve can be released at any time and the limiting pipe plug sleeve is kept fixed.

An end weight device for horizontal fabric blind includes the front and rear meshed screens fixed to a winding rod rotatably installed inside a head rail. The front and rear meshed screens are secured to each edge of a plurality of shield slats, so that sunlight can be shielded. While the plurality of shield slats is maintained in a level state, the blind allows entering the sunlight and venting air. The meshed screens are tensioned responding to pull the operating string. Since a plurality of shield slats are maintained in a level state with the front and back meshed screens due to the end weight device, the front and rear meshed screens are not separated from each other.

An end weight device for horizontal fabric blind includes the front and rear meshed screens fixed to a winding rod rotatably installed inside a head rail. The front and rear meshed screens are secured to each edge of a plurality of shield slats, so that sunlight can be shielded. While the plurality of shield slats is maintained in a level state, the blind allows entering the sunlight and venting air. The meshed screens are tensioned responding to pull the operating string. Since a plurality of shield slats are maintained in a level state with the front and back meshed screens due to the end weight device, the front and rear meshed screens are not separated from each other.

Example methods and apparatus can be used to reduce noise in motor assemblies, such as those used in architectural coverings. An example apparatus includes a first driver configured to be coupled to and rotated by an output shaft of a motor, a second driver, and a plurality of vibration-absorbers disposed between the first driver and the second driver. The second driver is configured to be coupled to a rotating member to transfer rotational motion from the first driver to the rotating member via the vibration-absorbers.

Example methods and apparatus can be used to reduce noise in motor assemblies, such as those used in architectural coverings. An example apparatus includes a first driver configured to be coupled to and rotated by an output shaft of a motor, a second driver, and a plurality of vibration-absorbers disposed between the first driver and the second driver. The second driver is configured to be coupled to a rotating member to transfer rotational motion from the first driver to the rotating member via the vibration-absorbers.

Example methods and apparatus can be used to reduce noise in motor assemblies, such as those used in architectural coverings. An example apparatus includes a first driver configured to be coupled to and rotated by an output shaft of a motor, a second driver, and a plurality of vibration-absorbers disposed between the first driver and the second driver. The second driver is configured to be coupled to a rotating member to transfer rotational motion from the first driver to the rotating member via the vibration-absorbers.

Example methods and apparatus can be used to reduce noise in motor assemblies, such as those used in architectural coverings. An example apparatus includes a first driver configured to be coupled to and rotated by an output shaft of a motor, a second driver, and a plurality of vibration-absorbers disposed between the first driver and the second driver. The second driver is configured to be coupled to a rotating member to transfer rotational motion from the first driver to the rotating member via the vibration-absorbers.