Abstract: A window blind assembly includes a window frame and multiple slats are pivotably connected between two sides of the window frame. A driving plate is connected to the window frame and the slats are pivotably connected to the driving plate. An adjustment device has a case and a power unit is located in the case. The power unit is connected to an arm which has an elongate slot. A driven member is connected to the driving plate and has a guide rod which is movably engaged with the elongate slot. A control unit and a rechargeable battery are located in the case and respectively connected with the power unit. A solar power generating unit is connected to the control unit and the rechargeable battery. The angles of the slats are adjusted by the adjustment device via the power unit.

Abstract: An electric window blind includes a window frame and multiple slats are located between two side rails of the window frame. Each of the slats has two end faces and each end face has a mediate portion and two end portions. The medial portion of each of two end faces of each of the slats is pivotably connected to the window frame. An adjustment device has a power unit which has an output end and an arm with an elongate slot is connected to the output end. A link is fixed to the plates and has a protrusion which is movably engaged with the elongate slot. One of the two end portions of each slat is pivotably connected to the plate. By activating the power unit, the slats are pivoted to adjust the angular positions of the slats.

Abstract: An electric projector screen is revealed. A linkage member is sleeved in a winding tube in a fixed seat and a locator is fixed on the winding tube. An interlock pipe mounted with a connection part therein is arranged between the linkage member and the locator. The interlock pipe and the connection part are corresponding to each other for location. An output end of a motor in the interlock pipe is connected to the connection part while the other end of the motor is arranged with a fastening plate. The cover has limit holes corresponding to the locator so that the locator is pressed tightly by stoppers passing through the limit holes. Thus the screen fabric is located and limited during motor maintenance and replacement and damages caused by sudden opening of the screen fabric are prevented. The motor maintenance and replacement become easier and more convenient.