A multistate resistance adjusting device for a non-pull cord window blind includes a base, an adjusting unit, and an elastic member. The base has a bottom trough provided on the periphery thereof with positioning grooves. The adjusting unit has a control pin provided with a transmission portion rotatable and vertically movable on the base and a positioning portion provided on the outer peripheral surface of the transmission portion and connected with an adjusting rod. When the positioning portion is engaged with one of the positioning grooves, the control pin is disabled from rotating relative to the base and adjusting the resistance applied on the lift transmission cord. When the control pin is moved upwardly to separate the positioning portion thereof from the positioning groove, the control pin is rotatable relative to the base, and the resistance applied on the lift transmission cord is adjustable through the adjusting rod.

Disclosed is a drive device for a vertical window blind, comprising: a driving connecting rod, a driving screw rod and an open-and-close transmission rod connected with a slat open-and-close control screw of the vertical window blind, wherein the driving connecting rod drives the slat open-and-close control screw to axially rotate in the horizontal direction by the rotational driving force via the driving screw rod and the open-and-close transmission rod, thereby moving a plurality of slats slidably disposed on the slat open-and-close control screw in the horizontal direction.

A light blocking system is disclosed, which is adapted to be used in a vertical blind which includes a headrail, a control mechanism provided in the headrail, and a covering assembly including a plurality of slats. Each of the slats is connected to the control mechanism with an end thereof, and therefore is hung below the headrail. A gap is left between the covering assembly and the headrail. The control mechanism is adapted to turn the slats in situ relative to the headrail, or to move the slats back and forth in a longitudinal direction of the headrail. The light blocking system includes a cover plate provided corresponding to the gap, wherein the cover plate covers the gap when the covering assembly is in a closed state.

A device for orienting slats relative to the sun includes a housing, an elongate guide which is connected to the housing and in which the slats are engageable and guidable, a drive with which the slats, which extend substantially transversely of the elongate guide, are rotatably drivable about their longitudinal axis, a controller configured to control the drive such that the slats are orientable relative to the sun, and rotational position determining mechanism configured to detertmine the rotational position of the slats. A solar tracking system is provided for orienting slats relative to the sun, and including such an orienting device. A method is provided for orienting slats with such an orienting device.

The present invention relates to a method for changing the envelope structure of a building to improve functions or facilitate modifying same of a building in accordance with user requests without any reduction to the usable interior space of the building, the method comprising the steps of: a) separating, from an exterior structure, the target exterior enclosure the function of which is to be changed; b) sliding and pulling out the target exterior enclosure, like a drawer, along a guide frame to the outside of the exterior structure; (c) removing a cartridge inside the target exterior enclosure and inserting a cartridge having a new function; and (d) inserting the target exterior enclosure back into the exterior structure by sliding the target exterior enclosure, like a drawer, along the guide panel.

The present invention relates to a louver apparatus with independent top and bottom, the louver allowing being opened and closed from the top or bottom independently. The louver apparatus comprises: a rail means comprising an upper rail and a lower rail; a turning means installed in accommodating spaces of the upper and lower rails so as to be operated independently; and a louver means positioned between the upper rail and lower rail to rotate the slats according to the operation of the turning means.

A modulator for a vertical louvre blind includes a case, a top cap, a transmission member, and a connector. The case has an encircling wall, a first axial hole, a bottom wall, and an accommodating space. The transmission member is accommodated in the accommodating space. An end of the transmission member is connected to the connector. The top cap is detachably disposed at the top side of the case, and has a base and a lateral plate formed at one side of the base. The lateral plate is formed with a horizontally extending section on the periphery of the base and further extends downwardly to be formed with a downwardly extending section. The horizontally extending section and the downwardly extending section collectively form a positionally limiting area to positionally limit the encircling wall, making the top cap strengthen the structure of the encircling wall of the case.